io_edgeport.c 100.2 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
/*
 * Edgeport USB Serial Converter driver
 *
 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
 *
 *	This program is free software; you can redistribute it and/or modify
 *	it under the terms of the GNU General Public License as published by
 *	the Free Software Foundation; either version 2 of the License, or
 *	(at your option) any later version.
 *
 * Supports the following devices:
 *	Edgeport/4
 *	Edgeport/4t
 *	Edgeport/2
 *	Edgeport/4i
 *	Edgeport/2i
 *	Edgeport/421
 *	Edgeport/21
 *	Rapidport/4
 *	Edgeport/8
 *	Edgeport/2D8
 *	Edgeport/4D8
 *	Edgeport/8i
 *
 * For questions or problems with this driver, contact Inside Out
 * Networks technical support, or Peter Berger <pberger@brimson.com>,
 * or Al Borchers <alborchers@steinerpoint.com>.
 *
 */

#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/serial.h>
#include <linux/ioctl.h>
#include <linux/wait.h>
44 45
#include <linux/firmware.h>
#include <linux/ihex.h>
A
Alan Cox 已提交
46
#include <linux/uaccess.h>
L
Linus Torvalds 已提交
47
#include <linux/usb.h>
48
#include <linux/usb/serial.h>
L
Linus Torvalds 已提交
49 50 51 52 53 54 55 56 57 58 59
#include "io_edgeport.h"
#include "io_ionsp.h"		/* info for the iosp messages */
#include "io_16654.h"		/* 16654 UART defines */

#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
#define DRIVER_DESC "Edgeport USB Serial Driver"

#define MAX_NAME_LEN		64

#define OPEN_TIMEOUT		(5*HZ)		/* 5 seconds */

60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
static const struct usb_device_id edgeport_2port_id_table[] = {
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
	{ }
};

static const struct usb_device_id edgeport_4port_id_table[] = {
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
	{ }
};

static const struct usb_device_id edgeport_8port_id_table[] = {
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
	{ }
};

static const struct usb_device_id Epic_port_id_table[] = {
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
	{ }
};

/* Devices that this driver supports */
static const struct usb_device_id id_table_combined[] = {
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_RAPIDPORT_4) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4T) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_2) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_2I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_421) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_21) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_8) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_2_DIN) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_4_DIN) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
	{ USB_DEVICE(USB_VENDOR_ID_ION,	ION_DEVICE_ID_EDGEPORT_8I) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
	{ USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
	{ USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
	{ USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
	{ } /* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, id_table_combined);


L
Linus Torvalds 已提交
142 143
/* receive port state */
enum RXSTATE {
A
Alan Cox 已提交
144 145 146 147
	EXPECT_HDR1 = 0,    /* Expect header byte 1 */
	EXPECT_HDR2 = 1,    /* Expect header byte 2 */
	EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
	EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
L
Linus Torvalds 已提交
148 149 150
};


A
Alan Cox 已提交
151 152 153
/* Transmit Fifo
 * This Transmit queue is an extension of the edgeport Rx buffer.
 * The maximum amount of data buffered in both the edgeport
L
Linus Torvalds 已提交
154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170
 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
 */
struct TxFifo {
	unsigned int	head;	/* index to head pointer (write) */
	unsigned int	tail;	/* index to tail pointer (read)  */
	unsigned int	count;	/* Bytes in queue */
	unsigned int	size;	/* Max size of queue (equal to Max number of TxCredits) */
	unsigned char	*fifo;	/* allocated Buffer */
};

/* This structure holds all of the local port information */
struct edgeport_port {
	__u16			txCredits;		/* our current credits for this port */
	__u16			maxTxCredits;		/* the max size of the port */

	struct TxFifo		txfifo;			/* transmit fifo -- size will be maxTxCredits */
	struct urb		*write_urb;		/* write URB for this port */
171
	bool			write_in_progress;	/* 'true' while a write URB is outstanding */
L
Linus Torvalds 已提交
172 173 174 175 176 177 178 179 180 181 182
	spinlock_t		ep_lock;

	__u8			shadowLCR;		/* last LCR value received */
	__u8			shadowMCR;		/* last MCR value received */
	__u8			shadowMSR;		/* last MSR value received */
	__u8			shadowLSR;		/* last LSR value received */
	__u8			shadowXonChar;		/* last value set as XON char in Edgeport */
	__u8			shadowXoffChar;		/* last value set as XOFF char in Edgeport */
	__u8			validDataMask;
	__u32			baudRate;

183 184 185 186 187
	bool			open;
	bool			openPending;
	bool			commandPending;
	bool			closePending;
	bool			chaseResponsePending;
L
Linus Torvalds 已提交
188 189 190 191 192 193 194 195 196 197 198

	wait_queue_head_t	wait_chase;		/* for handling sleeping while waiting for chase to finish */
	wait_queue_head_t	wait_open;		/* for handling sleeping while waiting for open to finish */
	wait_queue_head_t	wait_command;		/* for handling sleeping while waiting for command to finish */

	struct usb_serial_port	*port;			/* loop back to the owner of this object */
};


/* This structure holds all of the individual device information */
struct edgeport_serial {
199
	char			name[MAX_NAME_LEN+2];		/* string name of this device */
L
Linus Torvalds 已提交
200 201 202 203

	struct edge_manuf_descriptor	manuf_descriptor;	/* the manufacturer descriptor */
	struct edge_boot_descriptor	boot_descriptor;	/* the boot firmware descriptor */
	struct edgeport_product_info	product_info;		/* Product Info */
204 205
	struct edge_compatibility_descriptor epic_descriptor;	/* Edgeport compatible descriptor */
	int			is_epic;			/* flag if EPiC device or not */
L
Linus Torvalds 已提交
206 207

	__u8			interrupt_in_endpoint;		/* the interrupt endpoint handle */
A
Alan Cox 已提交
208 209
	unsigned char		*interrupt_in_buffer;		/* the buffer we use for the interrupt endpoint */
	struct urb		*interrupt_read_urb;		/* our interrupt urb */
L
Linus Torvalds 已提交
210 211

	__u8			bulk_in_endpoint;		/* the bulk in endpoint handle */
A
Alan Cox 已提交
212 213
	unsigned char		*bulk_in_buffer;		/* the buffer we use for the bulk in endpoint */
	struct urb		*read_urb;			/* our bulk read urb */
214
	bool			read_in_progress;
L
Linus Torvalds 已提交
215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
	spinlock_t		es_lock;

	__u8			bulk_out_endpoint;		/* the bulk out endpoint handle */

	__s16			rxBytesAvail;			/* the number of bytes that we need to read from this device */

	enum RXSTATE		rxState;			/* the current state of the bulk receive processor */
	__u8			rxHeader1;			/* receive header byte 1 */
	__u8			rxHeader2;			/* receive header byte 2 */
	__u8			rxHeader3;			/* receive header byte 3 */
	__u8			rxPort;				/* the port that we are currently receiving data for */
	__u8			rxStatusCode;			/* the receive status code */
	__u8			rxStatusParam;			/* the receive status paramater */
	__s16			rxBytesRemaining;		/* the number of port bytes left to read */
	struct usb_serial	*serial;			/* loop back to the owner of this object */
};

/* baud rate information */
struct divisor_table_entry {
	__u32   BaudRate;
	__u16  Divisor;
};

A
Alan Cox 已提交
238 239 240 241 242 243
/*
 * Define table of divisors for Rev A EdgePort/4 hardware
 * These assume a 3.6864MHz crystal, the standard /16, and
 * MCR.7 = 0.
 */

244
static const struct divisor_table_entry divisor_table[] = {
A
Alan Cox 已提交
245 246 247 248
	{   50,		4608},
	{   75,		3072},
	{   110,	2095},	/* 2094.545455 => 230450   => .0217 % over */
	{   134,	1713},	/* 1713.011152 => 230398.5 => .00065% under */
L
Linus Torvalds 已提交
249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265
	{   150,	1536},
	{   300,	768},
	{   600,	384},
	{   1200,	192},
	{   1800,	128},
	{   2400,	96},
	{   4800,	48},
	{   7200,	32},
	{   9600,	24},
	{   14400,	16},
	{   19200,	12},
	{   38400,	6},
	{   57600,	4},
	{   115200,	2},
	{   230400,	1},
};

266 267
/* Number of outstanding Command Write Urbs */
static atomic_t CmdUrbs = ATOMIC_INIT(0);
L
Linus Torvalds 已提交
268 269 270 271 272


/* local function prototypes */

/* function prototypes for all URB callbacks */
A
Alan Cox 已提交
273 274 275 276
static void edge_interrupt_callback(struct urb *urb);
static void edge_bulk_in_callback(struct urb *urb);
static void edge_bulk_out_data_callback(struct urb *urb);
static void edge_bulk_out_cmd_callback(struct urb *urb);
L
Linus Torvalds 已提交
277 278

/* function prototypes for the usbserial callbacks */
279
static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
280
static void edge_close(struct usb_serial_port *port);
A
Alan Cox 已提交
281 282 283 284 285 286 287 288 289
static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
					const unsigned char *buf, int count);
static int edge_write_room(struct tty_struct *tty);
static int edge_chars_in_buffer(struct tty_struct *tty);
static void edge_throttle(struct tty_struct *tty);
static void edge_unthrottle(struct tty_struct *tty);
static void edge_set_termios(struct tty_struct *tty,
					struct usb_serial_port *port,
					struct ktermios *old_termios);
290
static int  edge_ioctl(struct tty_struct *tty,
A
Alan Cox 已提交
291 292
					unsigned int cmd, unsigned long arg);
static void edge_break(struct tty_struct *tty, int break_state);
293
static int  edge_tiocmget(struct tty_struct *tty);
294
static int  edge_tiocmset(struct tty_struct *tty,
A
Alan Cox 已提交
295 296
					unsigned int set, unsigned int clear);
static int  edge_startup(struct usb_serial *serial);
297 298
static void edge_disconnect(struct usb_serial *serial);
static void edge_release(struct usb_serial *serial);
299 300
static int edge_port_probe(struct usb_serial_port *port);
static int edge_port_remove(struct usb_serial_port *port);
L
Linus Torvalds 已提交
301 302

/* function prototypes for all of our local functions */
A
Alan Cox 已提交
303 304 305 306 307

static void  process_rcvd_data(struct edgeport_serial *edge_serial,
				unsigned char *buffer, __u16 bufferLength);
static void process_rcvd_status(struct edgeport_serial *edge_serial,
				__u8 byte2, __u8 byte3);
J
Jiri Slaby 已提交
308 309
static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
		int length);
A
Alan Cox 已提交
310 311 312 313 314
static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
				__u8 lsr, __u8 data);
static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
				__u8 param);
315
static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
A
Alan Cox 已提交
316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345
static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
				int baudRate);
static void change_port_settings(struct tty_struct *tty,
				struct edgeport_port *edge_port,
				struct ktermios *old_termios);
static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
				__u8 regNum, __u8 regValue);
static int  write_cmd_usb(struct edgeport_port *edge_port,
				unsigned char *buffer, int writeLength);
static void send_more_port_data(struct edgeport_serial *edge_serial,
				struct edgeport_port *edge_port);

static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
					__u16 length, const __u8 *data);
static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
						__u16 length, __u8 *data);
static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
					__u16 length, const __u8 *data);
static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
static void get_boot_desc(struct edgeport_serial *edge_serial);
static void load_application_firmware(struct edgeport_serial *edge_serial);

static void unicode_to_ascii(char *string, int buflen,
				__le16 *unicode, int unicode_size);


/* ************************************************************************ */
/* ************************************************************************ */
/* ************************************************************************ */
/* ************************************************************************ */
L
Linus Torvalds 已提交
346 347 348 349 350 351 352 353 354

/************************************************************************
 *									*
 * update_edgeport_E2PROM()	Compare current versions of		*
 *				Boot ROM and Manufacture 		*
 *				Descriptors with versions		*
 *				embedded in this driver			*
 *									*
 ************************************************************************/
A
Alan Cox 已提交
355
static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
L
Linus Torvalds 已提交
356
{
357
	struct device *dev = &edge_serial->serial->dev->dev;
L
Linus Torvalds 已提交
358 359
	__u32 BootCurVer;
	__u32 BootNewVer;
360 361 362 363 364 365 366
	__u8 BootMajorVersion;
	__u8 BootMinorVersion;
	__u16 BootBuildNumber;
	__u32 Bootaddr;
	const struct ihex_binrec *rec;
	const struct firmware *fw;
	const char *fw_name;
L
Linus Torvalds 已提交
367 368 369
	int response;

	switch (edge_serial->product_info.iDownloadFile) {
A
Alan Cox 已提交
370 371 372 373 374 375 376 377
	case EDGE_DOWNLOAD_FILE_I930:
		fw_name	= "edgeport/boot.fw";
		break;
	case EDGE_DOWNLOAD_FILE_80251:
		fw_name	= "edgeport/boot2.fw";
		break;
	default:
		return;
L
Linus Torvalds 已提交
378 379
	}

380 381 382
	response = request_ihex_firmware(&fw, fw_name,
					 &edge_serial->serial->dev->dev);
	if (response) {
383
		dev_err(dev, "Failed to load image \"%s\" err %d\n",
384 385 386 387 388 389 390 391 392
		       fw_name, response);
		return;
	}

	rec = (const struct ihex_binrec *)fw->data;
	BootMajorVersion = rec->data[0];
	BootMinorVersion = rec->data[1];
	BootBuildNumber = (rec->data[2] << 8) | rec->data[3];

A
Alan Cox 已提交
393
	/* Check Boot Image Version */
L
Linus Torvalds 已提交
394 395 396 397 398 399
	BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
		     (edge_serial->boot_descriptor.MinorVersion << 16) +
		      le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);

	BootNewVer = (BootMajorVersion << 24) +
		     (BootMinorVersion << 16) +
400
		      BootBuildNumber;
L
Linus Torvalds 已提交
401

402
	dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
L
Linus Torvalds 已提交
403 404 405 406 407 408
	    edge_serial->boot_descriptor.MajorVersion,
	    edge_serial->boot_descriptor.MinorVersion,
	    le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));


	if (BootNewVer > BootCurVer) {
409
		dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
L
Linus Torvalds 已提交
410 411 412
		    edge_serial->boot_descriptor.MajorVersion,
		    edge_serial->boot_descriptor.MinorVersion,
		    le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
413
		    BootMajorVersion, BootMinorVersion, BootBuildNumber);
L
Linus Torvalds 已提交
414

415
		dev_dbg(dev, "Downloading new Boot Image\n");
L
Linus Torvalds 已提交
416

417 418 419 420 421 422 423 424
		for (rec = ihex_next_binrec(rec); rec;
		     rec = ihex_next_binrec(rec)) {
			Bootaddr = be32_to_cpu(rec->addr);
			response = rom_write(edge_serial->serial,
					     Bootaddr >> 16,
					     Bootaddr & 0xFFFF,
					     be16_to_cpu(rec->len),
					     &rec->data[0]);
L
Linus Torvalds 已提交
425
			if (response < 0) {
426 427 428 429
				dev_err(&edge_serial->serial->dev->dev,
					"rom_write failed (%x, %x, %d)\n",
					Bootaddr >> 16, Bootaddr & 0xFFFF,
					be16_to_cpu(rec->len));
L
Linus Torvalds 已提交
430 431 432 433
				break;
			}
		}
	} else {
434
		dev_dbg(dev, "Boot Image -- already up to date\n");
L
Linus Torvalds 已提交
435
	}
436
	release_firmware(fw);
L
Linus Torvalds 已提交
437 438 439 440 441 442 443 444
}

#if 0
/************************************************************************
 *
 *  Get string descriptor from device
 *
 ************************************************************************/
A
Alan Cox 已提交
445 446
static int get_string_desc(struct usb_device *dev, int Id,
				struct usb_string_descriptor **pRetDesc)
L
Linus Torvalds 已提交
447 448 449 450
{
	struct usb_string_descriptor StringDesc;
	struct usb_string_descriptor *pStringDesc;

451
	dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
L
Linus Torvalds 已提交
452

A
Alan Cox 已提交
453 454
	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
						sizeof(StringDesc)))
L
Linus Torvalds 已提交
455 456
		return 0;

A
Alan Cox 已提交
457 458
	pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
	if (!pStringDesc)
L
Linus Torvalds 已提交
459 460
		return -1;

A
Alan Cox 已提交
461 462
	if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
							StringDesc.bLength)) {
L
Linus Torvalds 已提交
463 464 465 466 467 468 469 470 471
		kfree(pStringDesc);
		return -1;
	}

	*pRetDesc = pStringDesc;
	return 0;
}
#endif

472 473
static void dump_product_info(struct edgeport_serial *edge_serial,
			      struct edgeport_product_info *product_info)
474
{
475 476
	struct device *dev = &edge_serial->serial->dev->dev;

A
Alan Cox 已提交
477
	/* Dump Product Info structure */
478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504
	dev_dbg(dev, "**Product Information:\n");
	dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
	dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
	dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
	dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
	dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
	dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
	dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
	dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
	dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
	dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
	dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
	dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
		product_info->BootMajorVersion,
		product_info->BootMinorVersion,
		le16_to_cpu(product_info->BootBuildNumber));
	dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
		product_info->FirmwareMajorVersion,
		product_info->FirmwareMinorVersion,
		le16_to_cpu(product_info->FirmwareBuildNumber));
	dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
		product_info->ManufactureDescDate[0],
		product_info->ManufactureDescDate[1],
		product_info->ManufactureDescDate[2]+1900);
	dev_dbg(dev, "  iDownloadFile         0x%x\n",
		product_info->iDownloadFile);
	dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
505 506
}

L
Linus Torvalds 已提交
507 508 509 510
static void get_product_info(struct edgeport_serial *edge_serial)
{
	struct edgeport_product_info *product_info = &edge_serial->product_info;

A
Alan Cox 已提交
511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538
	memset(product_info, 0, sizeof(struct edgeport_product_info));

	product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
	product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
	product_info->ProdInfoVer = 0;

	product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
	product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
	product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
	product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;

	product_info->BootMajorVersion =
				edge_serial->boot_descriptor.MajorVersion;
	product_info->BootMinorVersion =
				edge_serial->boot_descriptor.MinorVersion;
	product_info->BootBuildNumber =
				edge_serial->boot_descriptor.BuildNumber;

	memcpy(product_info->ManufactureDescDate,
			edge_serial->manuf_descriptor.DescDate,
			sizeof(edge_serial->manuf_descriptor.DescDate));

	/* check if this is 2nd generation hardware */
	if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
					    & ION_DEVICE_ID_80251_NETCHIP)
		product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
	else
		product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
539

A
Alan Cox 已提交
540
	/* Determine Product type and set appropriate flags */
L
Linus Torvalds 已提交
541
	switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
A
Alan Cox 已提交
542 543 544 545 546 547 548 549 550 551 552 553 554
	case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
	case ION_DEVICE_ID_EDGEPORT_4T:
	case ION_DEVICE_ID_EDGEPORT_4:
	case ION_DEVICE_ID_EDGEPORT_2:
	case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
	case ION_DEVICE_ID_EDGEPORT_8:
	case ION_DEVICE_ID_EDGEPORT_421:
	case ION_DEVICE_ID_EDGEPORT_21:
	case ION_DEVICE_ID_EDGEPORT_2_DIN:
	case ION_DEVICE_ID_EDGEPORT_4_DIN:
	case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
		product_info->IsRS232 = 1;
		break;
L
Linus Torvalds 已提交
555

A
Alan Cox 已提交
556 557 558 559
	case ION_DEVICE_ID_EDGEPORT_2I:	/* Edgeport/2 RS422/RS485 */
		product_info->IsRS422 = 1;
		product_info->IsRS485 = 1;
		break;
L
Linus Torvalds 已提交
560

A
Alan Cox 已提交
561 562 563 564
	case ION_DEVICE_ID_EDGEPORT_8I:	/* Edgeport/4 RS422 */
	case ION_DEVICE_ID_EDGEPORT_4I:	/* Edgeport/4 RS422 */
		product_info->IsRS422 = 1;
		break;
L
Linus Torvalds 已提交
565 566
	}

567
	dump_product_info(edge_serial, product_info);
568
}
L
Linus Torvalds 已提交
569

570 571 572 573 574
static int get_epic_descriptor(struct edgeport_serial *ep)
{
	int result;
	struct usb_serial *serial = ep->serial;
	struct edgeport_product_info *product_info = &ep->product_info;
575
	struct edge_compatibility_descriptor *epic;
576
	struct edge_compatibility_bits *bits;
577
	struct device *dev = &serial->dev->dev;
578 579

	ep->is_epic = 0;
580 581 582 583 584

	epic = kmalloc(sizeof(*epic), GFP_KERNEL);
	if (!epic)
		return -ENOMEM;

585 586 587
	result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
				 USB_REQUEST_ION_GET_EPIC_DESC,
				 0xC0, 0x00, 0x00,
588
				 epic, sizeof(*epic),
589
				 300);
590
	if (result == sizeof(*epic)) {
591
		ep->is_epic = 1;
592
		memcpy(&ep->epic_descriptor, epic, sizeof(*epic));
593 594
		memset(product_info, 0, sizeof(struct edgeport_product_info));

A
Alan Cox 已提交
595 596 597 598 599 600 601 602 603
		product_info->NumPorts = epic->NumPorts;
		product_info->ProdInfoVer = 0;
		product_info->FirmwareMajorVersion = epic->MajorVersion;
		product_info->FirmwareMinorVersion = epic->MinorVersion;
		product_info->FirmwareBuildNumber = epic->BuildNumber;
		product_info->iDownloadFile = epic->iDownloadFile;
		product_info->EpicVer = epic->EpicVer;
		product_info->Epic = epic->Supports;
		product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
604
		dump_product_info(ep, product_info);
605 606

		bits = &ep->epic_descriptor.Supports;
607 608 609 610 611 612 613 614 615 616 617 618 619 620
		dev_dbg(dev, "**EPIC descriptor:\n");
		dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR	? "TRUE": "FALSE");
		dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate	? "TRUE": "FALSE");
		dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport	? "TRUE": "FALSE");
621 622 623 624 625 626

		result = 0;
	} else if (result >= 0) {
		dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n",
			 result);
		result = -EIO;
627 628
	}

629 630
	kfree(epic);

631
	return result;
L
Linus Torvalds 已提交
632 633 634 635 636 637 638 639 640 641 642 643
}


/************************************************************************/
/************************************************************************/
/*            U S B  C A L L B A C K   F U N C T I O N S                */
/*            U S B  C A L L B A C K   F U N C T I O N S                */
/************************************************************************/
/************************************************************************/

/*****************************************************************************
 * edge_interrupt_callback
A
Alan Cox 已提交
644
 *	this is the callback function for when we have received data on the
L
Linus Torvalds 已提交
645 646
 *	interrupt endpoint.
 *****************************************************************************/
A
Alan Cox 已提交
647
static void edge_interrupt_callback(struct urb *urb)
L
Linus Torvalds 已提交
648
{
649 650
	struct edgeport_serial *edge_serial = urb->context;
	struct device *dev;
L
Linus Torvalds 已提交
651 652 653 654 655 656 657 658 659
	struct edgeport_port *edge_port;
	struct usb_serial_port *port;
	unsigned char *data = urb->transfer_buffer;
	int length = urb->actual_length;
	int bytes_avail;
	int position;
	int txCredits;
	int portNumber;
	int result;
660
	int status = urb->status;
L
Linus Torvalds 已提交
661

662
	switch (status) {
L
Linus Torvalds 已提交
663 664 665 666 667 668 669
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
670
		dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
L
Linus Torvalds 已提交
671 672
		return;
	default:
673
		dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
L
Linus Torvalds 已提交
674 675 676
		goto exit;
	}

677 678
	dev = &edge_serial->serial->dev->dev;

A
Alan Cox 已提交
679
	/* process this interrupt-read even if there are no ports open */
L
Linus Torvalds 已提交
680
	if (length) {
681
		usb_serial_debug_data(dev, __func__, length, data);
L
Linus Torvalds 已提交
682 683 684 685 686 687

		if (length > 1) {
			bytes_avail = data[0] | (data[1] << 8);
			if (bytes_avail) {
				spin_lock(&edge_serial->es_lock);
				edge_serial->rxBytesAvail += bytes_avail;
688 689 690 691 692
				dev_dbg(dev,
					"%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
					__func__, bytes_avail,
					edge_serial->rxBytesAvail,
					edge_serial->read_in_progress);
L
Linus Torvalds 已提交
693 694 695

				if (edge_serial->rxBytesAvail > 0 &&
				    !edge_serial->read_in_progress) {
696
					dev_dbg(dev, "%s - posting a read\n", __func__);
697
					edge_serial->read_in_progress = true;
L
Linus Torvalds 已提交
698

A
Alan Cox 已提交
699 700
					/* we have pending bytes on the
					   bulk in pipe, send a request */
L
Linus Torvalds 已提交
701 702
					result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
					if (result) {
703 704 705
						dev_err(dev,
							"%s - usb_submit_urb(read bulk) failed with result = %d\n",
							__func__, result);
706
						edge_serial->read_in_progress = false;
L
Linus Torvalds 已提交
707 708 709 710 711 712 713 714
					}
				}
				spin_unlock(&edge_serial->es_lock);
			}
		}
		/* grab the txcredits for the ports if available */
		position = 2;
		portNumber = 0;
A
Alan Cox 已提交
715 716
		while ((position < length) &&
				(portNumber < edge_serial->serial->num_ports)) {
L
Linus Torvalds 已提交
717 718 719 720 721 722 723 724
			txCredits = data[position] | (data[position+1] << 8);
			if (txCredits) {
				port = edge_serial->serial->port[portNumber];
				edge_port = usb_get_serial_port_data(port);
				if (edge_port->open) {
					spin_lock(&edge_port->ep_lock);
					edge_port->txCredits += txCredits;
					spin_unlock(&edge_port->ep_lock);
725 726 727
					dev_dbg(dev, "%s - txcredits for port%d = %d\n",
						__func__, portNumber,
						edge_port->txCredits);
L
Linus Torvalds 已提交
728

A
Alan Cox 已提交
729 730
					/* tell the tty driver that something
					   has changed */
J
Jiri Slaby 已提交
731
					tty_port_tty_wakeup(&edge_port->port->port);
A
Alan Cox 已提交
732 733 734 735
					/* Since we have more credit, check
					   if more data can be sent */
					send_more_port_data(edge_serial,
								edge_port);
L
Linus Torvalds 已提交
736 737 738 739 740 741 742 743
				}
			}
			position += 2;
			++portNumber;
		}
	}

exit:
A
Alan Cox 已提交
744 745 746 747 748
	result = usb_submit_urb(urb, GFP_ATOMIC);
	if (result)
		dev_err(&urb->dev->dev,
			"%s - Error %d submitting control urb\n",
						__func__, result);
L
Linus Torvalds 已提交
749 750 751 752 753
}


/*****************************************************************************
 * edge_bulk_in_callback
A
Alan Cox 已提交
754
 *	this is the callback function for when we have received data on the
L
Linus Torvalds 已提交
755 756
 *	bulk in endpoint.
 *****************************************************************************/
A
Alan Cox 已提交
757
static void edge_bulk_in_callback(struct urb *urb)
L
Linus Torvalds 已提交
758
{
759
	struct edgeport_serial	*edge_serial = urb->context;
760
	struct device *dev;
L
Linus Torvalds 已提交
761
	unsigned char		*data = urb->transfer_buffer;
762
	int			retval;
L
Linus Torvalds 已提交
763
	__u16			raw_data_length;
764
	int status = urb->status;
L
Linus Torvalds 已提交
765

766
	if (status) {
767 768
		dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
			__func__, status);
769
		edge_serial->read_in_progress = false;
L
Linus Torvalds 已提交
770 771 772 773
		return;
	}

	if (urb->actual_length == 0) {
774
		dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
775
		edge_serial->read_in_progress = false;
L
Linus Torvalds 已提交
776 777 778
		return;
	}

779
	dev = &edge_serial->serial->dev->dev;
L
Linus Torvalds 已提交
780 781
	raw_data_length = urb->actual_length;

782
	usb_serial_debug_data(dev, __func__, raw_data_length, data);
L
Linus Torvalds 已提交
783 784 785 786 787 788

	spin_lock(&edge_serial->es_lock);

	/* decrement our rxBytes available by the number that we just got */
	edge_serial->rxBytesAvail -= raw_data_length;

789 790
	dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
		raw_data_length, edge_serial->rxBytesAvail);
L
Linus Torvalds 已提交
791

A
Alan Cox 已提交
792
	process_rcvd_data(edge_serial, data, urb->actual_length);
L
Linus Torvalds 已提交
793 794 795

	/* check to see if there's any more data for us to read */
	if (edge_serial->rxBytesAvail > 0) {
796
		dev_dbg(dev, "%s - posting a read\n", __func__);
797 798
		retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
		if (retval) {
799 800 801
			dev_err(dev,
				"%s - usb_submit_urb(read bulk) failed, retval = %d\n",
				__func__, retval);
802
			edge_serial->read_in_progress = false;
L
Linus Torvalds 已提交
803 804
		}
	} else {
805
		edge_serial->read_in_progress = false;
L
Linus Torvalds 已提交
806 807 808 809 810 811 812 813
	}

	spin_unlock(&edge_serial->es_lock);
}


/*****************************************************************************
 * edge_bulk_out_data_callback
A
Alan Cox 已提交
814 815
 *	this is the callback function for when we have finished sending
 *	serial data on the bulk out endpoint.
L
Linus Torvalds 已提交
816
 *****************************************************************************/
A
Alan Cox 已提交
817
static void edge_bulk_out_data_callback(struct urb *urb)
L
Linus Torvalds 已提交
818
{
819
	struct edgeport_port *edge_port = urb->context;
820
	int status = urb->status;
L
Linus Torvalds 已提交
821

822
	if (status) {
823 824 825
		dev_dbg(&urb->dev->dev,
			"%s - nonzero write bulk status received: %d\n",
			__func__, status);
L
Linus Torvalds 已提交
826 827
	}

J
Jiri Slaby 已提交
828 829
	if (edge_port->open)
		tty_port_tty_wakeup(&edge_port->port->port);
L
Linus Torvalds 已提交
830

A
Alan Cox 已提交
831
	/* Release the Write URB */
832
	edge_port->write_in_progress = false;
L
Linus Torvalds 已提交
833

A
Alan Cox 已提交
834 835 836
	/* Check if more data needs to be sent */
	send_more_port_data((struct edgeport_serial *)
		(usb_get_serial_data(edge_port->port->serial)), edge_port);
L
Linus Torvalds 已提交
837 838 839 840 841
}


/*****************************************************************************
 * BulkOutCmdCallback
A
Alan Cox 已提交
842 843
 *	this is the callback function for when we have finished sending a
 *	command	on the bulk out endpoint.
L
Linus Torvalds 已提交
844
 *****************************************************************************/
A
Alan Cox 已提交
845
static void edge_bulk_out_cmd_callback(struct urb *urb)
L
Linus Torvalds 已提交
846
{
847
	struct edgeport_port *edge_port = urb->context;
L
Linus Torvalds 已提交
848 849
	int status = urb->status;

850
	atomic_dec(&CmdUrbs);
851 852
	dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
		__func__, urb, atomic_read(&CmdUrbs));
L
Linus Torvalds 已提交
853 854 855


	/* clean up the transfer buffer */
856
	kfree(urb->transfer_buffer);
L
Linus Torvalds 已提交
857 858

	/* Free the command urb */
A
Alan Cox 已提交
859
	usb_free_urb(urb);
L
Linus Torvalds 已提交
860 861

	if (status) {
862 863 864
		dev_dbg(&urb->dev->dev,
			"%s - nonzero write bulk status received: %d\n",
			__func__, status);
L
Linus Torvalds 已提交
865 866 867 868
		return;
	}

	/* tell the tty driver that something has changed */
J
Jiri Slaby 已提交
869 870
	if (edge_port->open)
		tty_port_tty_wakeup(&edge_port->port->port);
L
Linus Torvalds 已提交
871 872

	/* we have completed the command */
873
	edge_port->commandPending = false;
L
Linus Torvalds 已提交
874 875 876 877 878 879 880 881 882 883 884 885 886 887
	wake_up(&edge_port->wait_command);
}


/*****************************************************************************
 * Driver tty interface functions
 *****************************************************************************/

/*****************************************************************************
 * SerialOpen
 *	this function is called by the tty driver when a port is opened
 *	If successful, we return 0
 *	Otherwise we return a negative error number.
 *****************************************************************************/
888
static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
L
Linus Torvalds 已提交
889 890
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
891
	struct device *dev = &port->dev;
L
Linus Torvalds 已提交
892 893 894 895 896 897 898
	struct usb_serial *serial;
	struct edgeport_serial *edge_serial;
	int response;

	if (edge_port == NULL)
		return -ENODEV;

A
Alan Cox 已提交
899 900
	/* see if we've set up our endpoint info yet (can't set it up
	   in edge_startup as the structures were not set up at that time.) */
L
Linus Torvalds 已提交
901 902
	serial = port->serial;
	edge_serial = usb_get_serial_data(serial);
A
Alan Cox 已提交
903
	if (edge_serial == NULL)
L
Linus Torvalds 已提交
904 905 906
		return -ENODEV;
	if (edge_serial->interrupt_in_buffer == NULL) {
		struct usb_serial_port *port0 = serial->port[0];
A
Alan Cox 已提交
907

L
Linus Torvalds 已提交
908
		/* not set up yet, so do it now */
A
Alan Cox 已提交
909 910 911 912
		edge_serial->interrupt_in_buffer =
					port0->interrupt_in_buffer;
		edge_serial->interrupt_in_endpoint =
					port0->interrupt_in_endpointAddress;
L
Linus Torvalds 已提交
913 914
		edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
		edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
A
Alan Cox 已提交
915 916
		edge_serial->bulk_in_endpoint =
					port0->bulk_in_endpointAddress;
L
Linus Torvalds 已提交
917
		edge_serial->read_urb = port0->read_urb;
A
Alan Cox 已提交
918 919 920
		edge_serial->bulk_out_endpoint =
					port0->bulk_out_endpointAddress;

L
Linus Torvalds 已提交
921 922
		/* set up our interrupt urb */
		usb_fill_int_urb(edge_serial->interrupt_read_urb,
A
Alan Cox 已提交
923 924 925 926 927 928 929 930
		      serial->dev,
		      usb_rcvintpipe(serial->dev,
				port0->interrupt_in_endpointAddress),
		      port0->interrupt_in_buffer,
		      edge_serial->interrupt_read_urb->transfer_buffer_length,
		      edge_interrupt_callback, edge_serial,
		      edge_serial->interrupt_read_urb->interval);

L
Linus Torvalds 已提交
931 932
		/* set up our bulk in urb */
		usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
A
Alan Cox 已提交
933 934 935 936 937
			usb_rcvbulkpipe(serial->dev,
				port0->bulk_in_endpointAddress),
			port0->bulk_in_buffer,
			edge_serial->read_urb->transfer_buffer_length,
			edge_bulk_in_callback, edge_serial);
938
		edge_serial->read_in_progress = false;
L
Linus Torvalds 已提交
939 940

		/* start interrupt read for this edgeport
A
Alan Cox 已提交
941 942 943 944
		 * this interrupt will continue as long
		 * as the edgeport is connected */
		response = usb_submit_urb(edge_serial->interrupt_read_urb,
								GFP_KERNEL);
L
Linus Torvalds 已提交
945
		if (response) {
946 947
			dev_err(dev, "%s - Error %d submitting control urb\n",
				__func__, response);
L
Linus Torvalds 已提交
948 949
		}
	}
A
Alan Cox 已提交
950

L
Linus Torvalds 已提交
951 952 953 954 955 956
	/* initialize our wait queues */
	init_waitqueue_head(&edge_port->wait_open);
	init_waitqueue_head(&edge_port->wait_chase);
	init_waitqueue_head(&edge_port->wait_command);

	/* initialize our port settings */
A
Alan Cox 已提交
957 958 959
	edge_port->txCredits = 0;	/* Can't send any data yet */
	/* Must always set this bit to enable ints! */
	edge_port->shadowMCR = MCR_MASTER_IE;
960
	edge_port->chaseResponsePending = false;
L
Linus Torvalds 已提交
961 962

	/* send a open port command */
963 964
	edge_port->openPending = true;
	edge_port->open        = false;
A
Alan Cox 已提交
965
	response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
L
Linus Torvalds 已提交
966 967

	if (response < 0) {
968
		dev_err(dev, "%s - error sending open port command\n", __func__);
969
		edge_port->openPending = false;
L
Linus Torvalds 已提交
970 971 972 973
		return -ENODEV;
	}

	/* now wait for the port to be completely opened */
A
Alan Cox 已提交
974 975
	wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
								OPEN_TIMEOUT);
L
Linus Torvalds 已提交
976

977
	if (!edge_port->open) {
L
Linus Torvalds 已提交
978
		/* open timed out */
979
		dev_dbg(dev, "%s - open timedout\n", __func__);
980
		edge_port->openPending = false;
L
Linus Torvalds 已提交
981 982 983 984 985 986 987 988
		return -ENODEV;
	}

	/* create the txfifo */
	edge_port->txfifo.head	= 0;
	edge_port->txfifo.tail	= 0;
	edge_port->txfifo.count	= 0;
	edge_port->txfifo.size	= edge_port->maxTxCredits;
A
Alan Cox 已提交
989
	edge_port->txfifo.fifo	= kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
L
Linus Torvalds 已提交
990 991

	if (!edge_port->txfifo.fifo) {
992
		edge_close(port);
L
Linus Torvalds 已提交
993 994 995 996
		return -ENOMEM;
	}

	/* Allocate a URB for the write */
A
Alan Cox 已提交
997
	edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
998
	edge_port->write_in_progress = false;
L
Linus Torvalds 已提交
999 1000

	if (!edge_port->write_urb) {
1001
		edge_close(port);
L
Linus Torvalds 已提交
1002 1003 1004
		return -ENOMEM;
	}

1005 1006
	dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
		__func__, edge_port->maxTxCredits);
L
Linus Torvalds 已提交
1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017

	return 0;
}


/************************************************************************
 *
 * block_until_chase_response
 *
 *	This function will block the close until one of the following:
 *		1. Response to our Chase comes from Edgeport
J
Joe Perches 已提交
1018
 *		2. A timeout of 10 seconds without activity has expired
L
Linus Torvalds 已提交
1019 1020 1021 1022 1023
 *		   (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 *
 ************************************************************************/
static void block_until_chase_response(struct edgeport_port *edge_port)
{
1024
	struct device *dev = &edge_port->port->dev;
L
Linus Torvalds 已提交
1025 1026 1027 1028 1029 1030
	DEFINE_WAIT(wait);
	__u16 lastCredits;
	int timeout = 1*HZ;
	int loop = 10;

	while (1) {
A
Alan Cox 已提交
1031
		/* Save Last credits */
L
Linus Torvalds 已提交
1032 1033
		lastCredits = edge_port->txCredits;

A
Alan Cox 已提交
1034
		/* Did we get our Chase response */
1035
		if (!edge_port->chaseResponsePending) {
1036
			dev_dbg(dev, "%s - Got Chase Response\n", __func__);
L
Linus Torvalds 已提交
1037

A
Alan Cox 已提交
1038 1039
			/* did we get all of our credit back? */
			if (edge_port->txCredits == edge_port->maxTxCredits) {
1040
				dev_dbg(dev, "%s - Got all credits\n", __func__);
L
Linus Torvalds 已提交
1041 1042 1043 1044
				return;
			}
		}

A
Alan Cox 已提交
1045 1046 1047
		/* Block the thread for a while */
		prepare_to_wait(&edge_port->wait_chase, &wait,
						TASK_UNINTERRUPTIBLE);
L
Linus Torvalds 已提交
1048 1049 1050 1051
		schedule_timeout(timeout);
		finish_wait(&edge_port->wait_chase, &wait);

		if (lastCredits == edge_port->txCredits) {
A
Alan Cox 已提交
1052
			/* No activity.. count down. */
L
Linus Torvalds 已提交
1053 1054
			loop--;
			if (loop == 0) {
1055
				edge_port->chaseResponsePending = false;
1056
				dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
L
Linus Torvalds 已提交
1057 1058 1059
				return;
			}
		} else {
A
Alan Cox 已提交
1060
			/* Reset timeout value back to 10 seconds */
1061
			dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
A
Alan Cox 已提交
1062
					lastCredits, edge_port->txCredits);
L
Linus Torvalds 已提交
1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075
			loop = 10;
		}
	}
}


/************************************************************************
 *
 * block_until_tx_empty
 *
 *	This function will block the close until one of the following:
 *		1. TX count are 0
 *		2. The edgeport has stopped
J
Joe Perches 已提交
1076
 *		3. A timeout of 3 seconds without activity has expired
L
Linus Torvalds 已提交
1077 1078
 *
 ************************************************************************/
A
Alan Cox 已提交
1079
static void block_until_tx_empty(struct edgeport_port *edge_port)
L
Linus Torvalds 已提交
1080
{
1081
	struct device *dev = &edge_port->port->dev;
L
Linus Torvalds 已提交
1082 1083 1084 1085 1086 1087 1088
	DEFINE_WAIT(wait);
	struct TxFifo *fifo = &edge_port->txfifo;
	__u32 lastCount;
	int timeout = HZ/10;
	int loop = 30;

	while (1) {
A
Alan Cox 已提交
1089
		/* Save Last count */
L
Linus Torvalds 已提交
1090 1091
		lastCount = fifo->count;

A
Alan Cox 已提交
1092
		/* Is the Edgeport Buffer empty? */
L
Linus Torvalds 已提交
1093
		if (lastCount == 0) {
1094
			dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
L
Linus Torvalds 已提交
1095 1096 1097
			return;
		}

A
Alan Cox 已提交
1098 1099 1100
		/* Block the thread for a while */
		prepare_to_wait(&edge_port->wait_chase, &wait,
						TASK_UNINTERRUPTIBLE);
L
Linus Torvalds 已提交
1101 1102 1103
		schedule_timeout(timeout);
		finish_wait(&edge_port->wait_chase, &wait);

1104
		dev_dbg(dev, "%s wait\n", __func__);
L
Linus Torvalds 已提交
1105 1106

		if (lastCount == fifo->count) {
A
Alan Cox 已提交
1107
			/* No activity.. count down. */
L
Linus Torvalds 已提交
1108 1109
			loop--;
			if (loop == 0) {
1110
				dev_dbg(dev, "%s - TIMEOUT\n", __func__);
L
Linus Torvalds 已提交
1111 1112 1113
				return;
			}
		} else {
A
Alan Cox 已提交
1114
			/* Reset timeout value back to seconds */
L
Linus Torvalds 已提交
1115 1116 1117 1118 1119 1120 1121 1122 1123 1124
			loop = 30;
		}
	}
}


/*****************************************************************************
 * edge_close
 *	this function is called by the tty driver when a port is closed
 *****************************************************************************/
1125
static void edge_close(struct usb_serial_port *port)
L
Linus Torvalds 已提交
1126 1127 1128 1129 1130 1131 1132
{
	struct edgeport_serial *edge_serial;
	struct edgeport_port *edge_port;
	int status;

	edge_serial = usb_get_serial_data(port->serial);
	edge_port = usb_get_serial_port_data(port);
A
Alan Cox 已提交
1133
	if (edge_serial == NULL || edge_port == NULL)
L
Linus Torvalds 已提交
1134
		return;
A
Alan Cox 已提交
1135 1136

	/* block until tx is empty */
L
Linus Torvalds 已提交
1137 1138
	block_until_tx_empty(edge_port);

1139
	edge_port->closePending = true;
L
Linus Torvalds 已提交
1140

1141 1142
	if (!edge_serial->is_epic ||
	    edge_serial->epic_descriptor.Supports.IOSPChase) {
1143
		/* flush and chase */
1144
		edge_port->chaseResponsePending = true;
1145

1146
		dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
A
Alan Cox 已提交
1147 1148 1149
		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
		if (status == 0)
			/* block until chase finished */
1150
			block_until_chase_response(edge_port);
A
Alan Cox 已提交
1151
		else
1152
			edge_port->chaseResponsePending = false;
L
Linus Torvalds 已提交
1153 1154
	}

1155 1156
	if (!edge_serial->is_epic ||
	    edge_serial->epic_descriptor.Supports.IOSPClose) {
1157
	       /* close the port */
1158
		dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
A
Alan Cox 已提交
1159
		send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1160
	}
L
Linus Torvalds 已提交
1161

A
Alan Cox 已提交
1162
	/* port->close = true; */
1163 1164 1165
	edge_port->closePending = false;
	edge_port->open = false;
	edge_port->openPending = false;
L
Linus Torvalds 已提交
1166

1167
	usb_kill_urb(edge_port->write_urb);
L
Linus Torvalds 已提交
1168 1169

	if (edge_port->write_urb) {
A
Alan Cox 已提交
1170 1171
		/* if this urb had a transfer buffer already
				(old transfer) free it */
1172 1173
		kfree(edge_port->write_urb->transfer_buffer);
		usb_free_urb(edge_port->write_urb);
L
Linus Torvalds 已提交
1174 1175
		edge_port->write_urb = NULL;
	}
1176 1177
	kfree(edge_port->txfifo.fifo);
	edge_port->txfifo.fifo = NULL;
A
Alan Cox 已提交
1178
}
L
Linus Torvalds 已提交
1179 1180 1181

/*****************************************************************************
 * SerialWrite
A
Alan Cox 已提交
1182 1183 1184 1185
 *	this function is called by the tty driver when data should be written
 *	to the port.
 *	If successful, we return the number of bytes written, otherwise we
 *	return a negative error number.
L
Linus Torvalds 已提交
1186
 *****************************************************************************/
A
Alan Cox 已提交
1187 1188
static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
					const unsigned char *data, int count)
L
Linus Torvalds 已提交
1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	struct TxFifo *fifo;
	int copySize;
	int bytesleft;
	int firsthalf;
	int secondhalf;
	unsigned long flags;

	if (edge_port == NULL)
		return -ENODEV;

A
Alan Cox 已提交
1201
	/* get a pointer to the Tx fifo */
L
Linus Torvalds 已提交
1202 1203 1204 1205
	fifo = &edge_port->txfifo;

	spin_lock_irqsave(&edge_port->ep_lock, flags);

A
Alan Cox 已提交
1206 1207 1208
	/* calculate number of bytes to put in fifo */
	copySize = min((unsigned int)count,
				(edge_port->txCredits - fifo->count));
L
Linus Torvalds 已提交
1209

1210 1211
	dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
		__func__, count, edge_port->txCredits - fifo->count, copySize);
L
Linus Torvalds 已提交
1212

A
Alan Cox 已提交
1213 1214
	/* catch writes of 0 bytes which the tty driver likes to give us,
	   and when txCredits is empty */
L
Linus Torvalds 已提交
1215
	if (copySize == 0) {
1216
		dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
L
Linus Torvalds 已提交
1217 1218 1219
		goto finish_write;
	}

A
Alan Cox 已提交
1220 1221 1222 1223 1224 1225 1226
	/* queue the data
	 * since we can never overflow the buffer we do not have to check for a
	 * full condition
	 *
	 * the copy is done is two parts -- first fill to the end of the buffer
	 * then copy the reset from the start of the buffer
	 */
L
Linus Torvalds 已提交
1227
	bytesleft = fifo->size - fifo->head;
A
Alan Cox 已提交
1228
	firsthalf = min(bytesleft, copySize);
1229 1230
	dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
		firsthalf, bytesleft);
L
Linus Torvalds 已提交
1231 1232 1233

	/* now copy our data */
	memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1234
	usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
L
Linus Torvalds 已提交
1235

A
Alan Cox 已提交
1236
	/* update the index and size */
L
Linus Torvalds 已提交
1237 1238 1239
	fifo->head  += firsthalf;
	fifo->count += firsthalf;

A
Alan Cox 已提交
1240 1241
	/* wrap the index */
	if (fifo->head == fifo->size)
L
Linus Torvalds 已提交
1242 1243 1244 1245 1246
		fifo->head = 0;

	secondhalf = copySize-firsthalf;

	if (secondhalf) {
1247
		dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
L
Linus Torvalds 已提交
1248
		memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1249
		usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
A
Alan Cox 已提交
1250
		/* update the index and size */
L
Linus Torvalds 已提交
1251 1252
		fifo->count += secondhalf;
		fifo->head  += secondhalf;
A
Alan Cox 已提交
1253 1254 1255
		/* No need to check for wrap since we can not get to end of
		 * the fifo in this part
		 */
L
Linus Torvalds 已提交
1256 1257 1258 1259 1260
	}

finish_write:
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

A
Alan Cox 已提交
1261 1262
	send_more_port_data((struct edgeport_serial *)
			usb_get_serial_data(port->serial), edge_port);
L
Linus Torvalds 已提交
1263

1264 1265
	dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
		__func__, copySize, edge_port->txCredits, fifo->count);
L
Linus Torvalds 已提交
1266

A
Alan Cox 已提交
1267
	return copySize;
L
Linus Torvalds 已提交
1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283
}


/************************************************************************
 *
 * send_more_port_data()
 *
 *	This routine attempts to write additional UART transmit data
 *	to a port over the USB bulk pipe. It is called (1) when new
 *	data has been written to a port's TxBuffer from higher layers
 *	(2) when the peripheral sends us additional TxCredits indicating
 *	that it can accept more	Tx data for a given port; and (3) when
 *	a bulk write completes successfully and we want to see if we
 *	can transmit more.
 *
 ************************************************************************/
A
Alan Cox 已提交
1284 1285
static void send_more_port_data(struct edgeport_serial *edge_serial,
					struct edgeport_port *edge_port)
L
Linus Torvalds 已提交
1286 1287
{
	struct TxFifo	*fifo = &edge_port->txfifo;
1288
	struct device	*dev = &edge_port->port->dev;
L
Linus Torvalds 已提交
1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302
	struct urb	*urb;
	unsigned char	*buffer;
	int		status;
	int		count;
	int		bytesleft;
	int		firsthalf;
	int		secondhalf;
	unsigned long	flags;

	spin_lock_irqsave(&edge_port->ep_lock, flags);

	if (edge_port->write_in_progress ||
	    !edge_port->open             ||
	    (fifo->count == 0)) {
1303 1304
		dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
			__func__, fifo->count, edge_port->write_in_progress);
L
Linus Torvalds 已提交
1305 1306 1307
		goto exit_send;
	}

A
Alan Cox 已提交
1308 1309 1310 1311 1312 1313 1314 1315
	/* since the amount of data in the fifo will always fit into the
	 * edgeport buffer we do not need to check the write length
	 *
	 * Do we have enough credits for this port to make it worthwhile
	 * to bother queueing a write. If it's too small, say a few bytes,
	 * it's better to wait for more credits so we can do a larger write.
	 */
	if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1316 1317
		dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
			__func__, fifo->count, edge_port->txCredits);
L
Linus Torvalds 已提交
1318 1319 1320
		goto exit_send;
	}

A
Alan Cox 已提交
1321
	/* lock this write */
1322
	edge_port->write_in_progress = true;
L
Linus Torvalds 已提交
1323

A
Alan Cox 已提交
1324
	/* get a pointer to the write_urb */
L
Linus Torvalds 已提交
1325 1326
	urb = edge_port->write_urb;

1327 1328 1329
	/* make sure transfer buffer is freed */
	kfree(urb->transfer_buffer);
	urb->transfer_buffer = NULL;
L
Linus Torvalds 已提交
1330

A
Alan Cox 已提交
1331 1332
	/* build the data header for the buffer and port that we are about
	   to send out */
L
Linus Torvalds 已提交
1333
	count = fifo->count;
A
Alan Cox 已提交
1334
	buffer = kmalloc(count+2, GFP_ATOMIC);
1335
	if (!buffer) {
1336
		edge_port->write_in_progress = false;
L
Linus Torvalds 已提交
1337 1338
		goto exit_send;
	}
1339 1340
	buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
	buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
L
Linus Torvalds 已提交
1341 1342 1343

	/* now copy our data */
	bytesleft =  fifo->size - fifo->tail;
A
Alan Cox 已提交
1344
	firsthalf = min(bytesleft, count);
L
Linus Torvalds 已提交
1345 1346 1347
	memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
	fifo->tail  += firsthalf;
	fifo->count -= firsthalf;
A
Alan Cox 已提交
1348
	if (fifo->tail == fifo->size)
L
Linus Torvalds 已提交
1349 1350 1351 1352
		fifo->tail = 0;

	secondhalf = count-firsthalf;
	if (secondhalf) {
A
Alan Cox 已提交
1353 1354
		memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
								secondhalf);
L
Linus Torvalds 已提交
1355 1356 1357 1358 1359
		fifo->tail  += secondhalf;
		fifo->count -= secondhalf;
	}

	if (count)
1360
		usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
L
Linus Torvalds 已提交
1361 1362

	/* fill up the urb with all of our data and submit it */
A
Alan Cox 已提交
1363 1364 1365 1366 1367
	usb_fill_bulk_urb(urb, edge_serial->serial->dev,
			usb_sndbulkpipe(edge_serial->serial->dev,
					edge_serial->bulk_out_endpoint),
			buffer, count+2,
			edge_bulk_out_data_callback, edge_port);
L
Linus Torvalds 已提交
1368 1369 1370

	/* decrement the number of credits we have by the number we just sent */
	edge_port->txCredits -= count;
1371
	edge_port->port->icount.tx += count;
L
Linus Torvalds 已提交
1372 1373 1374 1375

	status = usb_submit_urb(urb, GFP_ATOMIC);
	if (status) {
		/* something went wrong */
1376
		dev_err_console(edge_port->port,
A
Alan Cox 已提交
1377 1378
			"%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
				__func__, status);
1379
		edge_port->write_in_progress = false;
L
Linus Torvalds 已提交
1380 1381 1382

		/* revert the credits as something bad happened. */
		edge_port->txCredits += count;
1383
		edge_port->port->icount.tx -= count;
L
Linus Torvalds 已提交
1384
	}
1385 1386
	dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
		__func__, count, edge_port->txCredits, fifo->count);
L
Linus Torvalds 已提交
1387 1388 1389 1390 1391 1392 1393 1394

exit_send:
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
}


/*****************************************************************************
 * edge_write_room
A
Alan Cox 已提交
1395 1396 1397 1398
 *	this function is called by the tty driver when it wants to know how
 *	many bytes of data we can accept for a specific port. If successful,
 *	we return the amount of room that we have for this port	(the txCredits)
 *	otherwise we return a negative error number.
L
Linus Torvalds 已提交
1399
 *****************************************************************************/
A
Alan Cox 已提交
1400
static int edge_write_room(struct tty_struct *tty)
L
Linus Torvalds 已提交
1401
{
A
Alan Cox 已提交
1402
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
1403 1404 1405 1406 1407
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int room;
	unsigned long flags;

	if (edge_port == NULL)
1408
		return 0;
1409
	if (edge_port->closePending)
1410
		return 0;
L
Linus Torvalds 已提交
1411 1412

	if (!edge_port->open) {
1413
		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1414
		return 0;
L
Linus Torvalds 已提交
1415 1416
	}

A
Alan Cox 已提交
1417
	/* total of both buffers is still txCredit */
L
Linus Torvalds 已提交
1418 1419 1420 1421
	spin_lock_irqsave(&edge_port->ep_lock, flags);
	room = edge_port->txCredits - edge_port->txfifo.count;
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

1422
	dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
L
Linus Torvalds 已提交
1423 1424 1425 1426 1427 1428
	return room;
}


/*****************************************************************************
 * edge_chars_in_buffer
A
Alan Cox 已提交
1429 1430 1431 1432 1433
 *	this function is called by the tty driver when it wants to know how
 *	many bytes of data we currently have outstanding in the port (data that
 *	has been written, but hasn't made it out the port yet)
 *	If successful, we return the number of bytes left to be written in the
 *	system,
L
Linus Torvalds 已提交
1434 1435
 *	Otherwise we return a negative error number.
 *****************************************************************************/
A
Alan Cox 已提交
1436
static int edge_chars_in_buffer(struct tty_struct *tty)
L
Linus Torvalds 已提交
1437
{
A
Alan Cox 已提交
1438
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
1439 1440 1441 1442 1443
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int num_chars;
	unsigned long flags;

	if (edge_port == NULL)
1444
		return 0;
1445
	if (edge_port->closePending)
1446
		return 0;
L
Linus Torvalds 已提交
1447 1448

	if (!edge_port->open) {
1449
		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1450
		return 0;
L
Linus Torvalds 已提交
1451 1452 1453
	}

	spin_lock_irqsave(&edge_port->ep_lock, flags);
A
Alan Cox 已提交
1454 1455
	num_chars = edge_port->maxTxCredits - edge_port->txCredits +
						edge_port->txfifo.count;
L
Linus Torvalds 已提交
1456 1457
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);
	if (num_chars) {
1458
		dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
L
Linus Torvalds 已提交
1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469
	}

	return num_chars;
}


/*****************************************************************************
 * SerialThrottle
 *	this function is called by the tty driver when it wants to stop the data
 *	being read from the port.
 *****************************************************************************/
A
Alan Cox 已提交
1470
static void edge_throttle(struct tty_struct *tty)
L
Linus Torvalds 已提交
1471
{
A
Alan Cox 已提交
1472
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
1473 1474 1475 1476 1477 1478 1479
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int status;

	if (edge_port == NULL)
		return;

	if (!edge_port->open) {
1480
		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
L
Linus Torvalds 已提交
1481 1482 1483 1484 1485 1486
		return;
	}

	/* if we are implementing XON/XOFF, send the stop character */
	if (I_IXOFF(tty)) {
		unsigned char stop_char = STOP_CHAR(tty);
A
Alan Cox 已提交
1487 1488
		status = edge_write(tty, port, &stop_char, 1);
		if (status <= 0)
L
Linus Torvalds 已提交
1489 1490 1491 1492
			return;
	}

	/* if we are implementing RTS/CTS, toggle that line */
P
Peter Hurley 已提交
1493
	if (C_CRTSCTS(tty)) {
L
Linus Torvalds 已提交
1494
		edge_port->shadowMCR &= ~MCR_RTS;
A
Alan Cox 已提交
1495 1496 1497
		status = send_cmd_write_uart_register(edge_port, MCR,
							edge_port->shadowMCR);
		if (status != 0)
L
Linus Torvalds 已提交
1498 1499 1500 1501 1502 1503 1504
			return;
	}
}


/*****************************************************************************
 * edge_unthrottle
A
Alan Cox 已提交
1505 1506
 *	this function is called by the tty driver when it wants to resume the
 *	data being read from the port (called after SerialThrottle is called)
L
Linus Torvalds 已提交
1507
 *****************************************************************************/
A
Alan Cox 已提交
1508
static void edge_unthrottle(struct tty_struct *tty)
L
Linus Torvalds 已提交
1509
{
A
Alan Cox 已提交
1510
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
1511 1512 1513 1514 1515 1516 1517
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	int status;

	if (edge_port == NULL)
		return;

	if (!edge_port->open) {
1518
		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
L
Linus Torvalds 已提交
1519 1520 1521 1522 1523 1524
		return;
	}

	/* if we are implementing XON/XOFF, send the start character */
	if (I_IXOFF(tty)) {
		unsigned char start_char = START_CHAR(tty);
A
Alan Cox 已提交
1525 1526
		status = edge_write(tty, port, &start_char, 1);
		if (status <= 0)
L
Linus Torvalds 已提交
1527 1528 1529
			return;
	}
	/* if we are implementing RTS/CTS, toggle that line */
P
Peter Hurley 已提交
1530
	if (C_CRTSCTS(tty)) {
L
Linus Torvalds 已提交
1531
		edge_port->shadowMCR |= MCR_RTS;
A
Alan Cox 已提交
1532 1533
		send_cmd_write_uart_register(edge_port, MCR,
						edge_port->shadowMCR);
L
Linus Torvalds 已提交
1534 1535 1536 1537 1538 1539
	}
}


/*****************************************************************************
 * SerialSetTermios
A
Alan Cox 已提交
1540 1541
 *	this function is called by the tty driver when it wants to change
 * the termios structure
L
Linus Torvalds 已提交
1542
 *****************************************************************************/
A
Alan Cox 已提交
1543 1544
static void edge_set_termios(struct tty_struct *tty,
	struct usb_serial_port *port, struct ktermios *old_termios)
L
Linus Torvalds 已提交
1545 1546 1547 1548 1549 1550 1551
{
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);

	if (edge_port == NULL)
		return;

	if (!edge_port->open) {
1552
		dev_dbg(&port->dev, "%s - port not opened\n", __func__);
L
Linus Torvalds 已提交
1553 1554 1555 1556
		return;
	}

	/* change the port settings to the new ones specified */
A
Alan Cox 已提交
1557
	change_port_settings(tty, edge_port, old_termios);
L
Linus Torvalds 已提交
1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568
}


/*****************************************************************************
 * get_lsr_info - get line status register info
 *
 * Purpose: Let user call ioctl() to get info when the UART physically
 * 	    is emptied.  On bus types like RS485, the transmitter must
 * 	    release the bus after transmitting. This must be done when
 * 	    the transmit shift register is empty, not be done when the
 * 	    transmit holding register is empty.  This functionality
A
Alan Cox 已提交
1569
 * 	    allows an RS485 driver to be written in user space.
L
Linus Torvalds 已提交
1570
 *****************************************************************************/
A
Alan Cox 已提交
1571 1572
static int get_lsr_info(struct edgeport_port *edge_port,
						unsigned int __user *value)
L
Linus Torvalds 已提交
1573 1574 1575 1576 1577 1578 1579
{
	unsigned int result = 0;
	unsigned long flags;

	spin_lock_irqsave(&edge_port->ep_lock, flags);
	if (edge_port->maxTxCredits == edge_port->txCredits &&
	    edge_port->txfifo.count == 0) {
1580
		dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
L
Linus Torvalds 已提交
1581 1582 1583 1584 1585 1586 1587 1588 1589
		result = TIOCSER_TEMT;
	}
	spin_unlock_irqrestore(&edge_port->ep_lock, flags);

	if (copy_to_user(value, &result, sizeof(int)))
		return -EFAULT;
	return 0;
}

1590
static int edge_tiocmset(struct tty_struct *tty,
A
Alan Cox 已提交
1591
					unsigned int set, unsigned int clear)
L
Linus Torvalds 已提交
1592
{
A
Alan Cox 已提交
1593
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	unsigned int mcr;

	mcr = edge_port->shadowMCR;
	if (set & TIOCM_RTS)
		mcr |= MCR_RTS;
	if (set & TIOCM_DTR)
		mcr |= MCR_DTR;
	if (set & TIOCM_LOOP)
		mcr |= MCR_LOOPBACK;

	if (clear & TIOCM_RTS)
		mcr &= ~MCR_RTS;
	if (clear & TIOCM_DTR)
		mcr &= ~MCR_DTR;
	if (clear & TIOCM_LOOP)
		mcr &= ~MCR_LOOPBACK;

	edge_port->shadowMCR = mcr;

	send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);

	return 0;
}

1619
static int edge_tiocmget(struct tty_struct *tty)
L
Linus Torvalds 已提交
1620
{
A
Alan Cox 已提交
1621
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
	unsigned int result = 0;
	unsigned int msr;
	unsigned int mcr;

	msr = edge_port->shadowMSR;
	mcr = edge_port->shadowMCR;
	result = ((mcr & MCR_DTR)	? TIOCM_DTR: 0)	  /* 0x002 */
		  | ((mcr & MCR_RTS)	? TIOCM_RTS: 0)   /* 0x004 */
		  | ((msr & EDGEPORT_MSR_CTS)	? TIOCM_CTS: 0)   /* 0x020 */
		  | ((msr & EDGEPORT_MSR_CD)	? TIOCM_CAR: 0)   /* 0x040 */
		  | ((msr & EDGEPORT_MSR_RI)	? TIOCM_RI:  0)   /* 0x080 */
		  | ((msr & EDGEPORT_MSR_DSR)	? TIOCM_DSR: 0);  /* 0x100 */

	return result;
}

A
Alan Cox 已提交
1639 1640
static int get_serial_info(struct edgeport_port *edge_port,
				struct serial_struct __user *retinfo)
L
Linus Torvalds 已提交
1641 1642 1643 1644 1645 1646
{
	struct serial_struct tmp;

	memset(&tmp, 0, sizeof(tmp));

	tmp.type		= PORT_16550A;
1647
	tmp.line		= edge_port->port->minor;
1648
	tmp.port		= edge_port->port->port_number;
L
Linus Torvalds 已提交
1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664
	tmp.irq			= 0;
	tmp.xmit_fifo_size	= edge_port->maxTxCredits;
	tmp.baud_base		= 9600;
	tmp.close_delay		= 5*HZ;
	tmp.closing_wait	= 30*HZ;

	if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
		return -EFAULT;
	return 0;
}


/*****************************************************************************
 * SerialIoctl
 *	this function handles any ioctl calls to the driver
 *****************************************************************************/
1665
static int edge_ioctl(struct tty_struct *tty,
A
Alan Cox 已提交
1666
					unsigned int cmd, unsigned long arg)
L
Linus Torvalds 已提交
1667
{
A
Alan Cox 已提交
1668
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
1669 1670 1671 1672
	DEFINE_WAIT(wait);
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);

	switch (cmd) {
A
Alan Cox 已提交
1673
	case TIOCSERGETLSR:
1674
		dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
A
Alan Cox 已提交
1675 1676 1677
		return get_lsr_info(edge_port, (unsigned int __user *) arg);

	case TIOCGSERIAL:
1678
		dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
A
Alan Cox 已提交
1679
		return get_serial_info(edge_port, (struct serial_struct __user *) arg);
L
Linus Torvalds 已提交
1680 1681 1682 1683 1684 1685 1686 1687 1688
	}
	return -ENOIOCTLCMD;
}


/*****************************************************************************
 * SerialBreak
 *	this function sends a break to the port
 *****************************************************************************/
A
Alan Cox 已提交
1689
static void edge_break(struct tty_struct *tty, int break_state)
L
Linus Torvalds 已提交
1690
{
A
Alan Cox 已提交
1691
	struct usb_serial_port *port = tty->driver_data;
L
Linus Torvalds 已提交
1692
	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1693
	struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
L
Linus Torvalds 已提交
1694 1695
	int status;

1696 1697
	if (!edge_serial->is_epic ||
	    edge_serial->epic_descriptor.Supports.IOSPChase) {
1698
		/* flush and chase */
1699
		edge_port->chaseResponsePending = true;
1700

1701
		dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
A
Alan Cox 已提交
1702
		status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1703
		if (status == 0) {
A
Alan Cox 已提交
1704
			/* block until chase finished */
1705 1706
			block_until_chase_response(edge_port);
		} else {
1707
			edge_port->chaseResponsePending = false;
1708
		}
L
Linus Torvalds 已提交
1709 1710
	}

1711 1712
	if (!edge_serial->is_epic ||
	    edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1713
		if (break_state == -1) {
1714
			dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
A
Alan Cox 已提交
1715 1716
			status = send_iosp_ext_cmd(edge_port,
						IOSP_CMD_SET_BREAK, 0);
1717
		} else {
1718
			dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
A
Alan Cox 已提交
1719 1720
			status = send_iosp_ext_cmd(edge_port,
						IOSP_CMD_CLEAR_BREAK, 0);
1721
		}
A
Alan Cox 已提交
1722
		if (status)
1723
			dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
A
Alan Cox 已提交
1724
				__func__);
L
Linus Torvalds 已提交
1725 1726 1727 1728 1729 1730 1731 1732
	}
}


/*****************************************************************************
 * process_rcvd_data
 *	this function handles the data received on the bulk in pipe.
 *****************************************************************************/
A
Alan Cox 已提交
1733 1734
static void process_rcvd_data(struct edgeport_serial *edge_serial,
				unsigned char *buffer, __u16 bufferLength)
L
Linus Torvalds 已提交
1735
{
1736
	struct device *dev = &edge_serial->serial->dev->dev;
L
Linus Torvalds 已提交
1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
	struct usb_serial_port *port;
	struct edgeport_port *edge_port;
	__u16 lastBufferLength;
	__u16 rxLen;

	lastBufferLength = bufferLength + 1;

	while (bufferLength > 0) {
		/* failsafe incase we get a message that we don't understand */
		if (lastBufferLength == bufferLength) {
1747
			dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
L
Linus Torvalds 已提交
1748 1749 1750 1751 1752
			break;
		}
		lastBufferLength = bufferLength;

		switch (edge_serial->rxState) {
A
Alan Cox 已提交
1753 1754 1755 1756
		case EXPECT_HDR1:
			edge_serial->rxHeader1 = *buffer;
			++buffer;
			--bufferLength;
L
Linus Torvalds 已提交
1757

A
Alan Cox 已提交
1758 1759 1760 1761 1762 1763 1764 1765 1766 1767
			if (bufferLength == 0) {
				edge_serial->rxState = EXPECT_HDR2;
				break;
			}
			/* otherwise, drop on through */
		case EXPECT_HDR2:
			edge_serial->rxHeader2 = *buffer;
			++buffer;
			--bufferLength;

1768 1769
			dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
				edge_serial->rxHeader1, edge_serial->rxHeader2);
A
Alan Cox 已提交
1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792
			/* Process depending on whether this header is
			 * data or status */

			if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
				/* Decode this status header and go to
				 * EXPECT_HDR1 (if we can process the status
				 * with only 2 bytes), or go to EXPECT_HDR3 to
				 * get the third byte. */
				edge_serial->rxPort =
				    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
				edge_serial->rxStatusCode =
				    IOSP_GET_STATUS_CODE(
						edge_serial->rxHeader1);

				if (!IOSP_STATUS_IS_2BYTE(
						edge_serial->rxStatusCode)) {
					/* This status needs additional bytes.
					 * Save what we have and then wait for
					 * more data.
					 */
					edge_serial->rxStatusParam
						= edge_serial->rxHeader2;
					edge_serial->rxState = EXPECT_HDR3;
L
Linus Torvalds 已提交
1793 1794
					break;
				}
A
Alan Cox 已提交
1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807
				/* We have all the header bytes, process the
				   status now */
				process_rcvd_status(edge_serial,
						edge_serial->rxHeader2, 0);
				edge_serial->rxState = EXPECT_HDR1;
				break;
			} else {
				edge_serial->rxPort =
				    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
				edge_serial->rxBytesRemaining =
				    IOSP_GET_HDR_DATA_LEN(
						edge_serial->rxHeader1,
						edge_serial->rxHeader2);
1808 1809 1810 1811
				dev_dbg(dev, "%s - Data for Port %u Len %u\n",
					__func__,
					edge_serial->rxPort,
					edge_serial->rxBytesRemaining);
A
Alan Cox 已提交
1812 1813 1814 1815 1816

				/* ASSERT(DevExt->RxPort < DevExt->NumPorts);
				 * ASSERT(DevExt->RxBytesRemaining <
				 *		IOSP_MAX_DATA_LENGTH);
				 */
L
Linus Torvalds 已提交
1817

A
Alan Cox 已提交
1818 1819
				if (bufferLength == 0) {
					edge_serial->rxState = EXPECT_DATA;
L
Linus Torvalds 已提交
1820 1821
					break;
				}
A
Alan Cox 已提交
1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834
				/* Else, drop through */
			}
		case EXPECT_DATA: /* Expect data */
			if (bufferLength < edge_serial->rxBytesRemaining) {
				rxLen = bufferLength;
				/* Expect data to start next buffer */
				edge_serial->rxState = EXPECT_DATA;
			} else {
				/* BufLen >= RxBytesRemaining */
				rxLen = edge_serial->rxBytesRemaining;
				/* Start another header next time */
				edge_serial->rxState = EXPECT_HDR1;
			}
L
Linus Torvalds 已提交
1835

A
Alan Cox 已提交
1836 1837
			bufferLength -= rxLen;
			edge_serial->rxBytesRemaining -= rxLen;
L
Linus Torvalds 已提交
1838

A
Alan Cox 已提交
1839 1840 1841 1842 1843 1844 1845
			/* spit this data back into the tty driver if this
			   port is open */
			if (rxLen) {
				port = edge_serial->serial->port[
							edge_serial->rxPort];
				edge_port = usb_get_serial_port_data(port);
				if (edge_port->open) {
J
Jiri Slaby 已提交
1846 1847 1848 1849 1850
					dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
						__func__, rxLen,
						edge_serial->rxPort);
					edge_tty_recv(edge_port->port, buffer,
							rxLen);
1851
					edge_port->port->icount.rx += rxLen;
L
Linus Torvalds 已提交
1852
				}
A
Alan Cox 已提交
1853 1854 1855
				buffer += rxLen;
			}
			break;
L
Linus Torvalds 已提交
1856

A
Alan Cox 已提交
1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868
		case EXPECT_HDR3:	/* Expect 3rd byte of status header */
			edge_serial->rxHeader3 = *buffer;
			++buffer;
			--bufferLength;

			/* We have all the header bytes, process the
			   status now */
			process_rcvd_status(edge_serial,
				edge_serial->rxStatusParam,
				edge_serial->rxHeader3);
			edge_serial->rxState = EXPECT_HDR1;
			break;
L
Linus Torvalds 已提交
1869 1870 1871 1872 1873 1874 1875
		}
	}
}


/*****************************************************************************
 * process_rcvd_status
A
Alan Cox 已提交
1876 1877
 *	this function handles the any status messages received on the
 *	bulk in pipe.
L
Linus Torvalds 已提交
1878
 *****************************************************************************/
A
Alan Cox 已提交
1879 1880
static void process_rcvd_status(struct edgeport_serial *edge_serial,
						__u8 byte2, __u8 byte3)
L
Linus Torvalds 已提交
1881 1882 1883
{
	struct usb_serial_port *port;
	struct edgeport_port *edge_port;
A
Alan Cox 已提交
1884
	struct tty_struct *tty;
1885
	struct device *dev;
L
Linus Torvalds 已提交
1886 1887 1888 1889 1890 1891
	__u8 code = edge_serial->rxStatusCode;

	/* switch the port pointer to the one being currently talked about */
	port = edge_serial->serial->port[edge_serial->rxPort];
	edge_port = usb_get_serial_port_data(port);
	if (edge_port == NULL) {
A
Alan Cox 已提交
1892 1893 1894
		dev_err(&edge_serial->serial->dev->dev,
			"%s - edge_port == NULL for port %d\n",
					__func__, edge_serial->rxPort);
L
Linus Torvalds 已提交
1895 1896
		return;
	}
1897
	dev = &port->dev;
L
Linus Torvalds 已提交
1898 1899 1900

	if (code == IOSP_EXT_STATUS) {
		switch (byte2) {
A
Alan Cox 已提交
1901 1902 1903
		case IOSP_EXT_STATUS_CHASE_RSP:
			/* we want to do EXT status regardless of port
			 * open/closed */
1904 1905
			dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
				__func__, edge_serial->rxPort, byte3);
A
Alan Cox 已提交
1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917
			/* Currently, the only EXT_STATUS is Chase, so process
			 * here instead of one more call to one more subroutine
			 * If/when more EXT_STATUS, there'll be more work to do
			 * Also, we currently clear flag and close the port
			 * regardless of content of above's Byte3.
			 * We could choose to do something else when Byte3 says
			 * Timeout on Chase from Edgeport, like wait longer in
			 * block_until_chase_response, but for now we don't.
			 */
			edge_port->chaseResponsePending = false;
			wake_up(&edge_port->wait_chase);
			return;
L
Linus Torvalds 已提交
1918

A
Alan Cox 已提交
1919
		case IOSP_EXT_STATUS_RX_CHECK_RSP:
1920 1921
			dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
				__func__, edge_serial->rxPort, byte3);
A
Alan Cox 已提交
1922 1923
			/* Port->RxCheckRsp = true; */
			return;
L
Linus Torvalds 已提交
1924 1925 1926 1927 1928 1929
		}
	}

	if (code == IOSP_STATUS_OPEN_RSP) {
		edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
		edge_port->maxTxCredits = edge_port->txCredits;
1930 1931
		dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
			__func__, edge_serial->rxPort, byte2, edge_port->txCredits);
A
Alan Cox 已提交
1932
		handle_new_msr(edge_port, byte2);
L
Linus Torvalds 已提交
1933

A
Alan Cox 已提交
1934 1935
		/* send the current line settings to the port so we are
		   in sync with any further termios calls */
A
Alan Cox 已提交
1936 1937 1938
		tty = tty_port_tty_get(&edge_port->port->port);
		if (tty) {
			change_port_settings(tty,
1939
				edge_port, &tty->termios);
A
Alan Cox 已提交
1940 1941
			tty_kref_put(tty);
		}
L
Linus Torvalds 已提交
1942 1943

		/* we have completed the open */
1944 1945
		edge_port->openPending = false;
		edge_port->open = true;
L
Linus Torvalds 已提交
1946 1947 1948 1949
		wake_up(&edge_port->wait_open);
		return;
	}

A
Alan Cox 已提交
1950 1951 1952 1953 1954
	/* If port is closed, silently discard all rcvd status. We can
	 * have cases where buffered status is received AFTER the close
	 * port command is sent to the Edgeport.
	 */
	if (!edge_port->open || edge_port->closePending)
L
Linus Torvalds 已提交
1955 1956 1957
		return;

	switch (code) {
A
Alan Cox 已提交
1958 1959
	/* Not currently sent by Edgeport */
	case IOSP_STATUS_LSR:
1960 1961
		dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
			__func__, edge_serial->rxPort, byte2);
A
Alan Cox 已提交
1962 1963
		handle_new_lsr(edge_port, false, byte2, 0);
		break;
L
Linus Torvalds 已提交
1964

A
Alan Cox 已提交
1965
	case IOSP_STATUS_LSR_DATA:
1966 1967
		dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
			__func__, edge_serial->rxPort, byte2, byte3);
A
Alan Cox 已提交
1968 1969 1970 1971 1972 1973
		/* byte2 is LSR Register */
		/* byte3 is broken data byte */
		handle_new_lsr(edge_port, true, byte2, byte3);
		break;
	/*
	 *	case IOSP_EXT_4_STATUS:
1974
	 *		dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
A
Alan Cox 已提交
1975 1976 1977 1978
	 *			__func__, edge_serial->rxPort, byte2, byte3);
	 *		break;
	 */
	case IOSP_STATUS_MSR:
1979 1980
		dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
			__func__, edge_serial->rxPort, byte2);
A
Alan Cox 已提交
1981 1982 1983 1984 1985 1986 1987
		/*
		 * Process this new modem status and generate appropriate
		 * events, etc, based on the new status. This routine
		 * also saves the MSR in Port->ShadowMsr.
		 */
		handle_new_msr(edge_port, byte2);
		break;
L
Linus Torvalds 已提交
1988

A
Alan Cox 已提交
1989
	default:
1990
		dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
A
Alan Cox 已提交
1991
		break;
L
Linus Torvalds 已提交
1992 1993 1994 1995 1996 1997 1998 1999
	}
}


/*****************************************************************************
 * edge_tty_recv
 *	this function passes data on to the tty flip buffer
 *****************************************************************************/
J
Jiri Slaby 已提交
2000 2001
static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
		int length)
L
Linus Torvalds 已提交
2002 2003 2004
{
	int cnt;

J
Jiri Slaby 已提交
2005
	cnt = tty_insert_flip_string(&port->port, data, length);
2006
	if (cnt < length) {
J
Jiri Slaby 已提交
2007
		dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
2008 2009 2010 2011
				__func__, length - cnt);
	}
	data += cnt;
	length -= cnt;
L
Linus Torvalds 已提交
2012

J
Jiri Slaby 已提交
2013
	tty_flip_buffer_push(&port->port);
L
Linus Torvalds 已提交
2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
}


/*****************************************************************************
 * handle_new_msr
 *	this function handles any change to the msr register for a port.
 *****************************************************************************/
static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
{
	struct  async_icount *icount;

A
Alan Cox 已提交
2025 2026
	if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
			EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2027
		icount = &edge_port->port->icount;
L
Linus Torvalds 已提交
2028 2029

		/* update input line counters */
A
Alan Cox 已提交
2030
		if (newMsr & EDGEPORT_MSR_DELTA_CTS)
L
Linus Torvalds 已提交
2031
			icount->cts++;
A
Alan Cox 已提交
2032
		if (newMsr & EDGEPORT_MSR_DELTA_DSR)
L
Linus Torvalds 已提交
2033
			icount->dsr++;
A
Alan Cox 已提交
2034
		if (newMsr & EDGEPORT_MSR_DELTA_CD)
L
Linus Torvalds 已提交
2035
			icount->dcd++;
A
Alan Cox 已提交
2036
		if (newMsr & EDGEPORT_MSR_DELTA_RI)
L
Linus Torvalds 已提交
2037
			icount->rng++;
2038
		wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
L
Linus Torvalds 已提交
2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049
	}

	/* Save the new modem status */
	edge_port->shadowMSR = newMsr & 0xf0;
}


/*****************************************************************************
 * handle_new_lsr
 *	this function handles any change to the lsr register for a port.
 *****************************************************************************/
A
Alan Cox 已提交
2050 2051
static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
							__u8 lsr, __u8 data)
L
Linus Torvalds 已提交
2052
{
A
Alan Cox 已提交
2053 2054 2055
	__u8 newLsr = (__u8) (lsr & (__u8)
		(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
	struct async_icount *icount;
L
Linus Torvalds 已提交
2056 2057 2058 2059

	edge_port->shadowLSR = lsr;

	if (newLsr & LSR_BREAK) {
A
Alan Cox 已提交
2060 2061 2062 2063 2064
		/*
		 * Parity and Framing errors only count if they
		 * occur exclusive of a break being
		 * received.
		 */
L
Linus Torvalds 已提交
2065 2066 2067 2068
		newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
	}

	/* Place LSR data byte into Rx buffer */
J
Jiri Slaby 已提交
2069 2070 2071
	if (lsrData)
		edge_tty_recv(edge_port->port, &data, 1);

L
Linus Torvalds 已提交
2072
	/* update input line counters */
2073
	icount = &edge_port->port->icount;
A
Alan Cox 已提交
2074
	if (newLsr & LSR_BREAK)
L
Linus Torvalds 已提交
2075
		icount->brk++;
A
Alan Cox 已提交
2076
	if (newLsr & LSR_OVER_ERR)
L
Linus Torvalds 已提交
2077
		icount->overrun++;
A
Alan Cox 已提交
2078
	if (newLsr & LSR_PAR_ERR)
L
Linus Torvalds 已提交
2079
		icount->parity++;
A
Alan Cox 已提交
2080
	if (newLsr & LSR_FRM_ERR)
L
Linus Torvalds 已提交
2081 2082 2083 2084 2085 2086
		icount->frame++;
}


/****************************************************************************
 * sram_write
A
Alan Cox 已提交
2087
 *	writes a number of bytes to the Edgeport device's sram starting at the
L
Linus Torvalds 已提交
2088 2089 2090 2091
 *	given address.
 *	If successful returns the number of bytes written, otherwise it returns
 *	a negative error number of the problem.
 ****************************************************************************/
A
Alan Cox 已提交
2092 2093
static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
					__u16 length, const __u8 *data)
L
Linus Torvalds 已提交
2094 2095 2096 2097 2098
{
	int result;
	__u16 current_length;
	unsigned char *transfer_buffer;

2099
	dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
L
Linus Torvalds 已提交
2100

A
Alan Cox 已提交
2101
	transfer_buffer =  kmalloc(64, GFP_KERNEL);
2102
	if (!transfer_buffer)
L
Linus Torvalds 已提交
2103 2104 2105 2106 2107
		return -ENOMEM;

	/* need to split these writes up into 64 byte chunks */
	result = 0;
	while (length > 0) {
A
Alan Cox 已提交
2108
		if (length > 64)
L
Linus Torvalds 已提交
2109
			current_length = 64;
A
Alan Cox 已提交
2110
		else
L
Linus Torvalds 已提交
2111
			current_length = length;
A
Alan Cox 已提交
2112

2113
/*		dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
A
Alan Cox 已提交
2114 2115 2116 2117 2118 2119
		memcpy(transfer_buffer, data, current_length);
		result = usb_control_msg(serial->dev,
					usb_sndctrlpipe(serial->dev, 0),
					USB_REQUEST_ION_WRITE_RAM,
					0x40, addr, extAddr, transfer_buffer,
					current_length, 300);
L
Linus Torvalds 已提交
2120 2121 2122 2123 2124
		if (result < 0)
			break;
		length -= current_length;
		addr += current_length;
		data += current_length;
A
Alan Cox 已提交
2125
	}
L
Linus Torvalds 已提交
2126

A
Alan Cox 已提交
2127
	kfree(transfer_buffer);
L
Linus Torvalds 已提交
2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138
	return result;
}


/****************************************************************************
 * rom_write
 *	writes a number of bytes to the Edgeport device's ROM starting at the
 *	given address.
 *	If successful returns the number of bytes written, otherwise it returns
 *	a negative error number of the problem.
 ****************************************************************************/
A
Alan Cox 已提交
2139 2140
static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
					__u16 length, const __u8 *data)
L
Linus Torvalds 已提交
2141 2142 2143 2144 2145
{
	int result;
	__u16 current_length;
	unsigned char *transfer_buffer;

A
Alan Cox 已提交
2146
	transfer_buffer =  kmalloc(64, GFP_KERNEL);
2147
	if (!transfer_buffer)
L
Linus Torvalds 已提交
2148 2149 2150 2151 2152
		return -ENOMEM;

	/* need to split these writes up into 64 byte chunks */
	result = 0;
	while (length > 0) {
A
Alan Cox 已提交
2153
		if (length > 64)
L
Linus Torvalds 已提交
2154
			current_length = 64;
A
Alan Cox 已提交
2155
		else
L
Linus Torvalds 已提交
2156
			current_length = length;
A
Alan Cox 已提交
2157 2158 2159 2160 2161 2162
		memcpy(transfer_buffer, data, current_length);
		result = usb_control_msg(serial->dev,
					usb_sndctrlpipe(serial->dev, 0),
					USB_REQUEST_ION_WRITE_ROM, 0x40,
					addr, extAddr,
					transfer_buffer, current_length, 300);
L
Linus Torvalds 已提交
2163 2164 2165 2166 2167
		if (result < 0)
			break;
		length -= current_length;
		addr += current_length;
		data += current_length;
A
Alan Cox 已提交
2168
	}
L
Linus Torvalds 已提交
2169

A
Alan Cox 已提交
2170
	kfree(transfer_buffer);
L
Linus Torvalds 已提交
2171 2172 2173 2174 2175 2176 2177 2178
	return result;
}


/****************************************************************************
 * rom_read
 *	reads a number of bytes from the Edgeport device starting at the given
 *	address.
2179
 *	Returns zero on success or a negative error number.
L
Linus Torvalds 已提交
2180
 ****************************************************************************/
A
Alan Cox 已提交
2181 2182
static int rom_read(struct usb_serial *serial, __u16 extAddr,
					__u16 addr, __u16 length, __u8 *data)
L
Linus Torvalds 已提交
2183 2184 2185 2186 2187
{
	int result;
	__u16 current_length;
	unsigned char *transfer_buffer;

A
Alan Cox 已提交
2188
	transfer_buffer =  kmalloc(64, GFP_KERNEL);
2189
	if (!transfer_buffer)
L
Linus Torvalds 已提交
2190 2191 2192 2193 2194
		return -ENOMEM;

	/* need to split these reads up into 64 byte chunks */
	result = 0;
	while (length > 0) {
A
Alan Cox 已提交
2195
		if (length > 64)
L
Linus Torvalds 已提交
2196
			current_length = 64;
A
Alan Cox 已提交
2197
		else
L
Linus Torvalds 已提交
2198
			current_length = length;
A
Alan Cox 已提交
2199 2200 2201 2202 2203
		result = usb_control_msg(serial->dev,
					usb_rcvctrlpipe(serial->dev, 0),
					USB_REQUEST_ION_READ_ROM,
					0xC0, addr, extAddr, transfer_buffer,
					current_length, 300);
2204 2205 2206
		if (result < current_length) {
			if (result >= 0)
				result = -EIO;
L
Linus Torvalds 已提交
2207
			break;
2208
		}
A
Alan Cox 已提交
2209
		memcpy(data, transfer_buffer, current_length);
L
Linus Torvalds 已提交
2210 2211 2212
		length -= current_length;
		addr += current_length;
		data += current_length;
2213 2214

		result = 0;
A
Alan Cox 已提交
2215
	}
L
Linus Torvalds 已提交
2216

A
Alan Cox 已提交
2217
	kfree(transfer_buffer);
L
Linus Torvalds 已提交
2218 2219 2220 2221 2222 2223 2224 2225
	return result;
}


/****************************************************************************
 * send_iosp_ext_cmd
 *	Is used to send a IOSP message to the Edgeport device
 ****************************************************************************/
A
Alan Cox 已提交
2226 2227
static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
						__u8 command, __u8 param)
L
Linus Torvalds 已提交
2228 2229 2230 2231 2232 2233
{
	unsigned char   *buffer;
	unsigned char   *currentCommand;
	int             length = 0;
	int             status = 0;

A
Alan Cox 已提交
2234
	buffer = kmalloc(10, GFP_ATOMIC);
2235
	if (!buffer)
L
Linus Torvalds 已提交
2236 2237 2238 2239
		return -ENOMEM;

	currentCommand = buffer;

2240 2241
	MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
			 command, param);
L
Linus Torvalds 已提交
2242

A
Alan Cox 已提交
2243
	status = write_cmd_usb(edge_port, buffer, length);
L
Linus Torvalds 已提交
2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256
	if (status) {
		/* something bad happened, let's free up the memory */
		kfree(buffer);
	}

	return status;
}


/*****************************************************************************
 * write_cmd_usb
 *	this function writes the given buffer out to the bulk write endpoint.
 *****************************************************************************/
A
Alan Cox 已提交
2257 2258
static int write_cmd_usb(struct edgeport_port *edge_port,
					unsigned char *buffer, int length)
L
Linus Torvalds 已提交
2259
{
A
Alan Cox 已提交
2260 2261
	struct edgeport_serial *edge_serial =
				usb_get_serial_data(edge_port->port->serial);
2262
	struct device *dev = &edge_port->port->dev;
L
Linus Torvalds 已提交
2263 2264 2265
	int status = 0;
	struct urb *urb;

2266
	usb_serial_debug_data(dev, __func__, length, buffer);
L
Linus Torvalds 已提交
2267 2268

	/* Allocate our next urb */
A
Alan Cox 已提交
2269
	urb = usb_alloc_urb(0, GFP_ATOMIC);
L
Linus Torvalds 已提交
2270 2271 2272
	if (!urb)
		return -ENOMEM;

2273
	atomic_inc(&CmdUrbs);
2274 2275
	dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
		__func__, urb, atomic_read(&CmdUrbs));
L
Linus Torvalds 已提交
2276

A
Alan Cox 已提交
2277 2278 2279 2280
	usb_fill_bulk_urb(urb, edge_serial->serial->dev,
			usb_sndbulkpipe(edge_serial->serial->dev,
					edge_serial->bulk_out_endpoint),
			buffer, length, edge_bulk_out_cmd_callback, edge_port);
L
Linus Torvalds 已提交
2281

2282
	edge_port->commandPending = true;
L
Linus Torvalds 已提交
2283 2284 2285 2286
	status = usb_submit_urb(urb, GFP_ATOMIC);

	if (status) {
		/* something went wrong */
2287 2288
		dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
			__func__, status);
L
Linus Torvalds 已提交
2289 2290
		usb_kill_urb(urb);
		usb_free_urb(urb);
2291
		atomic_dec(&CmdUrbs);
L
Linus Torvalds 已提交
2292 2293 2294 2295
		return status;
	}

#if 0
A
Alan Cox 已提交
2296
	wait_event(&edge_port->wait_command, !edge_port->commandPending);
L
Linus Torvalds 已提交
2297

2298
	if (edge_port->commandPending) {
L
Linus Torvalds 已提交
2299
		/* command timed out */
2300
		dev_dbg(dev, "%s - command timed out\n", __func__);
L
Linus Torvalds 已提交
2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312
		status = -EINVAL;
	}
#endif
	return status;
}


/*****************************************************************************
 * send_cmd_write_baud_rate
 *	this function sends the proper command to change the baud rate of the
 *	specified port.
 *****************************************************************************/
A
Alan Cox 已提交
2313 2314
static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
								int baudRate)
L
Linus Torvalds 已提交
2315
{
A
Alan Cox 已提交
2316 2317
	struct edgeport_serial *edge_serial =
				usb_get_serial_data(edge_port->port->serial);
2318
	struct device *dev = &edge_port->port->dev;
L
Linus Torvalds 已提交
2319 2320 2321 2322 2323
	unsigned char *cmdBuffer;
	unsigned char *currCmd;
	int cmdLen = 0;
	int divisor;
	int status;
2324
	u32 number = edge_port->port->port_number;
L
Linus Torvalds 已提交
2325

2326 2327
	if (edge_serial->is_epic &&
	    !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2328 2329
		dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
			baudRate);
2330 2331 2332
		return 0;
	}

2333
	dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
L
Linus Torvalds 已提交
2334

2335
	status = calc_baud_rate_divisor(dev, baudRate, &divisor);
L
Linus Torvalds 已提交
2336
	if (status) {
2337
		dev_err(dev, "%s - bad baud rate\n", __func__);
L
Linus Torvalds 已提交
2338 2339 2340
		return status;
	}

A
Alan Cox 已提交
2341 2342
	/* Alloc memory for the string of commands. */
	cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2343
	if (!cmdBuffer)
L
Linus Torvalds 已提交
2344
		return -ENOMEM;
2345

L
Linus Torvalds 已提交
2346 2347
	currCmd = cmdBuffer;

A
Alan Cox 已提交
2348 2349
	/* Enable access to divisor latch */
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
L
Linus Torvalds 已提交
2350

A
Alan Cox 已提交
2351 2352 2353
	/* Write the divisor itself */
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
L
Linus Torvalds 已提交
2354

A
Alan Cox 已提交
2355 2356 2357
	/* Restore original value to disable access to divisor latch */
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
						edge_port->shadowLCR);
L
Linus Torvalds 已提交
2358

A
Alan Cox 已提交
2359
	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
L
Linus Torvalds 已提交
2360 2361
	if (status) {
		/* something bad happened, let's free up the memory */
A
Alan Cox 已提交
2362
		kfree(cmdBuffer);
L
Linus Torvalds 已提交
2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373
	}

	return status;
}


/*****************************************************************************
 * calc_baud_rate_divisor
 *	this function calculates the proper baud rate divisor for the specified
 *	baud rate.
 *****************************************************************************/
2374
static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
L
Linus Torvalds 已提交
2375 2376 2377 2378
{
	int i;
	__u16 custom;

2379
	for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
A
Alan Cox 已提交
2380
		if (divisor_table[i].BaudRate == baudrate) {
L
Linus Torvalds 已提交
2381 2382 2383 2384 2385
			*divisor = divisor_table[i].Divisor;
			return 0;
		}
	}

A
Alan Cox 已提交
2386 2387 2388
	/* We have tried all of the standard baud rates
	 * lets try to calculate the divisor for this baud rate
	 * Make sure the baud rate is reasonable */
L
Linus Torvalds 已提交
2389
	if (baudrate > 50 && baudrate < 230400) {
A
Alan Cox 已提交
2390
		/* get divisor */
L
Linus Torvalds 已提交
2391 2392 2393 2394
		custom = (__u16)((230400L + baudrate/2) / baudrate);

		*divisor = custom;

2395
		dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
L
Linus Torvalds 已提交
2396 2397 2398 2399 2400 2401 2402 2403 2404
		return 0;
	}

	return -1;
}


/*****************************************************************************
 * send_cmd_write_uart_register
2405
 *  this function builds up a uart register message and sends to the device.
L
Linus Torvalds 已提交
2406
 *****************************************************************************/
A
Alan Cox 已提交
2407 2408
static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
						__u8 regNum, __u8 regValue)
L
Linus Torvalds 已提交
2409
{
A
Alan Cox 已提交
2410 2411
	struct edgeport_serial *edge_serial =
				usb_get_serial_data(edge_port->port->serial);
2412
	struct device *dev = &edge_port->port->dev;
L
Linus Torvalds 已提交
2413 2414 2415 2416 2417
	unsigned char *cmdBuffer;
	unsigned char *currCmd;
	unsigned long cmdLen = 0;
	int status;

2418 2419
	dev_dbg(dev, "%s - write to %s register 0x%02x\n",
		(regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
L
Linus Torvalds 已提交
2420

2421 2422 2423
	if (edge_serial->is_epic &&
	    !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
	    regNum == MCR) {
2424
		dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2425 2426 2427
		return 0;
	}

2428 2429 2430
	if (edge_serial->is_epic &&
	    !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
	    regNum == LCR) {
2431
		dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2432 2433 2434
		return 0;
	}

A
Alan Cox 已提交
2435 2436 2437
	/* Alloc memory for the string of commands. */
	cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
	if (cmdBuffer == NULL)
L
Linus Torvalds 已提交
2438 2439 2440 2441
		return -ENOMEM;

	currCmd = cmdBuffer;

A
Alan Cox 已提交
2442
	/* Build a cmd in the buffer to write the given register */
2443 2444
	MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
			   regNum, regValue);
L
Linus Torvalds 已提交
2445 2446 2447 2448

	status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
	if (status) {
		/* something bad happened, let's free up the memory */
A
Alan Cox 已提交
2449
		kfree(cmdBuffer);
L
Linus Torvalds 已提交
2450 2451 2452 2453 2454 2455 2456 2457
	}

	return status;
}


/*****************************************************************************
 * change_port_settings
A
Alan Cox 已提交
2458 2459
 *	This routine is called to set the UART on the device to match the
 *	specified new settings.
L
Linus Torvalds 已提交
2460
 *****************************************************************************/
A
Alan Cox 已提交
2461 2462 2463

static void change_port_settings(struct tty_struct *tty,
	struct edgeport_port *edge_port, struct ktermios *old_termios)
L
Linus Torvalds 已提交
2464
{
2465
	struct device *dev = &edge_port->port->dev;
A
Alan Cox 已提交
2466 2467
	struct edgeport_serial *edge_serial =
			usb_get_serial_data(edge_port->port->serial);
L
Linus Torvalds 已提交
2468 2469 2470 2471 2472 2473 2474 2475 2476 2477
	int baud;
	unsigned cflag;
	__u8 mask = 0xff;
	__u8 lData;
	__u8 lParity;
	__u8 lStop;
	__u8 rxFlow;
	__u8 txFlow;
	int status;

2478 2479
	if (!edge_port->open &&
	    !edge_port->openPending) {
2480
		dev_dbg(dev, "%s - port not opened\n", __func__);
L
Linus Torvalds 已提交
2481 2482 2483
		return;
	}

2484
	cflag = tty->termios.c_cflag;
L
Linus Torvalds 已提交
2485 2486

	switch (cflag & CSIZE) {
A
Alan Cox 已提交
2487 2488
	case CS5:
		lData = LCR_BITS_5; mask = 0x1f;
2489
		dev_dbg(dev, "%s - data bits = 5\n", __func__);
A
Alan Cox 已提交
2490 2491 2492
		break;
	case CS6:
		lData = LCR_BITS_6; mask = 0x3f;
2493
		dev_dbg(dev, "%s - data bits = 6\n", __func__);
A
Alan Cox 已提交
2494 2495 2496
		break;
	case CS7:
		lData = LCR_BITS_7; mask = 0x7f;
2497
		dev_dbg(dev, "%s - data bits = 7\n", __func__);
A
Alan Cox 已提交
2498 2499 2500 2501
		break;
	default:
	case CS8:
		lData = LCR_BITS_8;
2502
		dev_dbg(dev, "%s - data bits = 8\n", __func__);
A
Alan Cox 已提交
2503
		break;
L
Linus Torvalds 已提交
2504 2505 2506 2507 2508 2509 2510
	}

	lParity = LCR_PAR_NONE;
	if (cflag & PARENB) {
		if (cflag & CMSPAR) {
			if (cflag & PARODD) {
				lParity = LCR_PAR_MARK;
2511
				dev_dbg(dev, "%s - parity = mark\n", __func__);
L
Linus Torvalds 已提交
2512 2513
			} else {
				lParity = LCR_PAR_SPACE;
2514
				dev_dbg(dev, "%s - parity = space\n", __func__);
L
Linus Torvalds 已提交
2515 2516 2517
			}
		} else if (cflag & PARODD) {
			lParity = LCR_PAR_ODD;
2518
			dev_dbg(dev, "%s - parity = odd\n", __func__);
L
Linus Torvalds 已提交
2519 2520
		} else {
			lParity = LCR_PAR_EVEN;
2521
			dev_dbg(dev, "%s - parity = even\n", __func__);
L
Linus Torvalds 已提交
2522 2523
		}
	} else {
2524
		dev_dbg(dev, "%s - parity = none\n", __func__);
L
Linus Torvalds 已提交
2525 2526 2527 2528
	}

	if (cflag & CSTOPB) {
		lStop = LCR_STOP_2;
2529
		dev_dbg(dev, "%s - stop bits = 2\n", __func__);
L
Linus Torvalds 已提交
2530 2531
	} else {
		lStop = LCR_STOP_1;
2532
		dev_dbg(dev, "%s - stop bits = 1\n", __func__);
L
Linus Torvalds 已提交
2533 2534 2535 2536 2537 2538 2539
	}

	/* figure out the flow control settings */
	rxFlow = txFlow = 0x00;
	if (cflag & CRTSCTS) {
		rxFlow |= IOSP_RX_FLOW_RTS;
		txFlow |= IOSP_TX_FLOW_CTS;
2540
		dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
L
Linus Torvalds 已提交
2541
	} else {
2542
		dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
L
Linus Torvalds 已提交
2543 2544
	}

A
Alan Cox 已提交
2545 2546
	/* if we are implementing XON/XOFF, set the start and stop character
	   in the device */
L
Linus Torvalds 已提交
2547 2548 2549 2550
	if (I_IXOFF(tty) || I_IXON(tty)) {
		unsigned char stop_char  = STOP_CHAR(tty);
		unsigned char start_char = START_CHAR(tty);

2551 2552
		if (!edge_serial->is_epic ||
		    edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
A
Alan Cox 已提交
2553 2554 2555 2556
			send_iosp_ext_cmd(edge_port,
					IOSP_CMD_SET_XON_CHAR, start_char);
			send_iosp_ext_cmd(edge_port,
					IOSP_CMD_SET_XOFF_CHAR, stop_char);
2557
		}
L
Linus Torvalds 已提交
2558 2559 2560 2561

		/* if we are implementing INBOUND XON/XOFF */
		if (I_IXOFF(tty)) {
			rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2562 2563
			dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
				__func__, start_char, stop_char);
L
Linus Torvalds 已提交
2564
		} else {
2565
			dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
L
Linus Torvalds 已提交
2566 2567 2568 2569 2570
		}

		/* if we are implementing OUTBOUND XON/XOFF */
		if (I_IXON(tty)) {
			txFlow |= IOSP_TX_FLOW_XON_XOFF;
2571 2572
			dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
				__func__, start_char, stop_char);
L
Linus Torvalds 已提交
2573
		} else {
2574
			dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
L
Linus Torvalds 已提交
2575 2576 2577 2578
		}
	}

	/* Set flow control to the configured value */
2579 2580
	if (!edge_serial->is_epic ||
	    edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2581
		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2582 2583
	if (!edge_serial->is_epic ||
	    edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2584
		send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
L
Linus Torvalds 已提交
2585 2586 2587 2588 2589 2590 2591 2592


	edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
	edge_port->shadowLCR |= (lData | lParity | lStop);

	edge_port->validDataMask = mask;

	/* Send the updated LCR value to the EdgePort */
A
Alan Cox 已提交
2593 2594 2595
	status = send_cmd_write_uart_register(edge_port, LCR,
							edge_port->shadowLCR);
	if (status != 0)
L
Linus Torvalds 已提交
2596 2597 2598 2599
		return;

	/* set up the MCR register and send it to the EdgePort */
	edge_port->shadowMCR = MCR_MASTER_IE;
A
Alan Cox 已提交
2600
	if (cflag & CBAUD)
L
Linus Torvalds 已提交
2601
		edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
A
Alan Cox 已提交
2602 2603 2604 2605

	status = send_cmd_write_uart_register(edge_port, MCR,
						edge_port->shadowMCR);
	if (status != 0)
L
Linus Torvalds 已提交
2606 2607 2608 2609 2610 2611 2612 2613 2614
		return;

	/* Determine divisor based on baud rate */
	baud = tty_get_baud_rate(tty);
	if (!baud) {
		/* pick a default, any default... */
		baud = 9600;
	}

2615
	dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
A
Alan Cox 已提交
2616
	status = send_cmd_write_baud_rate(edge_port, baud);
2617 2618 2619 2620 2621
	if (status == -1) {
		/* Speed change was not possible - put back the old speed */
		baud = tty_termios_baud_rate(old_termios);
		tty_encode_baud_rate(tty, baud, baud);
	}
L
Linus Torvalds 已提交
2622 2623 2624 2625 2626 2627 2628 2629 2630 2631
}


/****************************************************************************
 * unicode_to_ascii
 *	Turns a string from Unicode into ASCII.
 *	Doesn't do a good job with any characters that are outside the normal
 *	ASCII range, but it's only for debugging...
 *	NOTE: expects the unicode in LE format
 ****************************************************************************/
A
Alan Cox 已提交
2632 2633
static void unicode_to_ascii(char *string, int buflen,
					__le16 *unicode, int unicode_size)
L
Linus Torvalds 已提交
2634 2635 2636
{
	int i;

2637
	if (buflen <= 0)	/* never happens, but... */
L
Linus Torvalds 已提交
2638
		return;
2639
	--buflen;		/* space for nul */
L
Linus Torvalds 已提交
2640

2641 2642 2643
	for (i = 0; i < unicode_size; i++) {
		if (i >= buflen)
			break;
L
Linus Torvalds 已提交
2644
		string[i] = (char)(le16_to_cpu(unicode[i]));
2645 2646
	}
	string[i] = 0x00;
L
Linus Torvalds 已提交
2647 2648 2649 2650 2651
}


/****************************************************************************
 * get_manufacturing_desc
A
Alan Cox 已提交
2652
 *	reads in the manufacturing descriptor and stores it into the serial
L
Linus Torvalds 已提交
2653 2654
 *	structure.
 ****************************************************************************/
A
Alan Cox 已提交
2655
static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
L
Linus Torvalds 已提交
2656
{
2657
	struct device *dev = &edge_serial->serial->dev->dev;
L
Linus Torvalds 已提交
2658 2659
	int response;

2660
	dev_dbg(dev, "getting manufacturer descriptor\n");
L
Linus Torvalds 已提交
2661

A
Alan Cox 已提交
2662 2663 2664 2665 2666
	response = rom_read(edge_serial->serial,
				(EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
				(__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
				EDGE_MANUF_DESC_LEN,
				(__u8 *)(&edge_serial->manuf_descriptor));
L
Linus Torvalds 已提交
2667

2668 2669 2670 2671
	if (response < 0) {
		dev_err(dev, "error in getting manufacturer descriptor: %d\n",
				response);
	} else {
L
Linus Torvalds 已提交
2672
		char string[30];
2673 2674
		dev_dbg(dev, "**Manufacturer Descriptor\n");
		dev_dbg(dev, "  RomSize:        %dK\n",
A
Alan Cox 已提交
2675
			edge_serial->manuf_descriptor.RomSize);
2676
		dev_dbg(dev, "  RamSize:        %dK\n",
A
Alan Cox 已提交
2677
			edge_serial->manuf_descriptor.RamSize);
2678
		dev_dbg(dev, "  CpuRev:         %d\n",
A
Alan Cox 已提交
2679
			edge_serial->manuf_descriptor.CpuRev);
2680
		dev_dbg(dev, "  BoardRev:       %d\n",
A
Alan Cox 已提交
2681
			edge_serial->manuf_descriptor.BoardRev);
2682
		dev_dbg(dev, "  NumPorts:       %d\n",
A
Alan Cox 已提交
2683
			edge_serial->manuf_descriptor.NumPorts);
2684
		dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
A
Alan Cox 已提交
2685 2686 2687
			edge_serial->manuf_descriptor.DescDate[0],
			edge_serial->manuf_descriptor.DescDate[1],
			edge_serial->manuf_descriptor.DescDate[2]+1900);
P
Pete Zaitcev 已提交
2688
		unicode_to_ascii(string, sizeof(string),
A
Alan Cox 已提交
2689 2690
			edge_serial->manuf_descriptor.SerialNumber,
			edge_serial->manuf_descriptor.SerNumLength/2);
2691
		dev_dbg(dev, "  SerialNumber: %s\n", string);
P
Pete Zaitcev 已提交
2692
		unicode_to_ascii(string, sizeof(string),
A
Alan Cox 已提交
2693 2694
			edge_serial->manuf_descriptor.AssemblyNumber,
			edge_serial->manuf_descriptor.AssemblyNumLength/2);
2695
		dev_dbg(dev, "  AssemblyNumber: %s\n", string);
P
Pete Zaitcev 已提交
2696
		unicode_to_ascii(string, sizeof(string),
2697 2698
		    edge_serial->manuf_descriptor.OemAssyNumber,
		    edge_serial->manuf_descriptor.OemAssyNumLength/2);
2699 2700
		dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
		dev_dbg(dev, "  UartType:       %d\n",
A
Alan Cox 已提交
2701
			edge_serial->manuf_descriptor.UartType);
2702
		dev_dbg(dev, "  IonPid:         %d\n",
A
Alan Cox 已提交
2703
			edge_serial->manuf_descriptor.IonPid);
2704
		dev_dbg(dev, "  IonConfig:      %d\n",
A
Alan Cox 已提交
2705
			edge_serial->manuf_descriptor.IonConfig);
L
Linus Torvalds 已提交
2706 2707 2708 2709 2710 2711
	}
}


/****************************************************************************
 * get_boot_desc
A
Alan Cox 已提交
2712
 *	reads in the bootloader descriptor and stores it into the serial
L
Linus Torvalds 已提交
2713 2714
 *	structure.
 ****************************************************************************/
A
Alan Cox 已提交
2715
static void get_boot_desc(struct edgeport_serial *edge_serial)
L
Linus Torvalds 已提交
2716
{
2717
	struct device *dev = &edge_serial->serial->dev->dev;
L
Linus Torvalds 已提交
2718 2719
	int response;

2720
	dev_dbg(dev, "getting boot descriptor\n");
L
Linus Torvalds 已提交
2721

A
Alan Cox 已提交
2722 2723 2724 2725 2726
	response = rom_read(edge_serial->serial,
				(EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
				(__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
				EDGE_BOOT_DESC_LEN,
				(__u8 *)(&edge_serial->boot_descriptor));
L
Linus Torvalds 已提交
2727

2728 2729 2730 2731
	if (response < 0) {
		dev_err(dev, "error in getting boot descriptor: %d\n",
				response);
	} else {
2732 2733 2734 2735
		dev_dbg(dev, "**Boot Descriptor:\n");
		dev_dbg(dev, "  BootCodeLength: %d\n",
			le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
		dev_dbg(dev, "  MajorVersion:   %d\n",
A
Alan Cox 已提交
2736
			edge_serial->boot_descriptor.MajorVersion);
2737
		dev_dbg(dev, "  MinorVersion:   %d\n",
A
Alan Cox 已提交
2738
			edge_serial->boot_descriptor.MinorVersion);
2739
		dev_dbg(dev, "  BuildNumber:    %d\n",
A
Alan Cox 已提交
2740
			le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2741
		dev_dbg(dev, "  Capabilities:   0x%x\n",
A
Alan Cox 已提交
2742
		      le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2743
		dev_dbg(dev, "  UConfig0:       %d\n",
A
Alan Cox 已提交
2744
			edge_serial->boot_descriptor.UConfig0);
2745
		dev_dbg(dev, "  UConfig1:       %d\n",
A
Alan Cox 已提交
2746
			edge_serial->boot_descriptor.UConfig1);
L
Linus Torvalds 已提交
2747 2748 2749 2750 2751 2752 2753 2754
	}
}


/****************************************************************************
 * load_application_firmware
 *	This is called to load the application firmware to the device
 ****************************************************************************/
A
Alan Cox 已提交
2755
static void load_application_firmware(struct edgeport_serial *edge_serial)
L
Linus Torvalds 已提交
2756
{
2757
	struct device *dev = &edge_serial->serial->dev->dev;
2758 2759 2760 2761
	const struct ihex_binrec *rec;
	const struct firmware *fw;
	const char *fw_name;
	const char *fw_info;
L
Linus Torvalds 已提交
2762
	int response;
2763 2764
	__u32 Operaddr;
	__u16 build;
L
Linus Torvalds 已提交
2765 2766 2767

	switch (edge_serial->product_info.iDownloadFile) {
		case EDGE_DOWNLOAD_FILE_I930:
2768 2769
			fw_info = "downloading firmware version (930)";
			fw_name	= "edgeport/down.fw";
L
Linus Torvalds 已提交
2770 2771 2772
			break;

		case EDGE_DOWNLOAD_FILE_80251:
2773 2774
			fw_info = "downloading firmware version (80251)";
			fw_name	= "edgeport/down2.fw";
L
Linus Torvalds 已提交
2775 2776 2777
			break;

		case EDGE_DOWNLOAD_FILE_NONE:
2778
			dev_dbg(dev, "No download file specified, skipping download\n");
L
Linus Torvalds 已提交
2779 2780 2781 2782 2783 2784
			return;

		default:
			return;
	}

2785 2786 2787
	response = request_ihex_firmware(&fw, fw_name,
				    &edge_serial->serial->dev->dev);
	if (response) {
2788
		dev_err(dev, "Failed to load image \"%s\" err %d\n",
2789 2790 2791 2792 2793 2794 2795
		       fw_name, response);
		return;
	}

	rec = (const struct ihex_binrec *)fw->data;
	build = (rec->data[2] << 8) | rec->data[3];

2796
	dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2797

2798 2799
	edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
	edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2800
	edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
L
Linus Torvalds 已提交
2801

2802 2803 2804 2805 2806 2807 2808 2809
	for (rec = ihex_next_binrec(rec); rec;
	     rec = ihex_next_binrec(rec)) {
		Operaddr = be32_to_cpu(rec->addr);
		response = sram_write(edge_serial->serial,
				     Operaddr >> 16,
				     Operaddr & 0xFFFF,
				     be16_to_cpu(rec->len),
				     &rec->data[0]);
L
Linus Torvalds 已提交
2810
		if (response < 0) {
2811 2812 2813 2814
			dev_err(&edge_serial->serial->dev->dev,
				"sram_write failed (%x, %x, %d)\n",
				Operaddr >> 16, Operaddr & 0xFFFF,
				be16_to_cpu(rec->len));
L
Linus Torvalds 已提交
2815 2816 2817 2818
			break;
		}
	}

2819 2820 2821 2822
	dev_dbg(dev, "sending exec_dl_code\n");
	response = usb_control_msg (edge_serial->serial->dev,
				    usb_sndctrlpipe(edge_serial->serial->dev, 0),
				    USB_REQUEST_ION_EXEC_DL_CODE,
L
Linus Torvalds 已提交
2823 2824
				    0x40, 0x4000, 0x0001, NULL, 0, 3000);

2825
	release_firmware(fw);
L
Linus Torvalds 已提交
2826 2827 2828 2829 2830 2831
}


/****************************************************************************
 * edge_startup
 ****************************************************************************/
A
Alan Cox 已提交
2832
static int edge_startup(struct usb_serial *serial)
L
Linus Torvalds 已提交
2833 2834 2835
{
	struct edgeport_serial *edge_serial;
	struct usb_device *dev;
2836
	struct device *ddev = &serial->dev->dev;
2837
	int i;
2838
	int response;
2839 2840 2841
	bool interrupt_in_found;
	bool bulk_in_found;
	bool bulk_out_found;
2842 2843 2844
	static __u32 descriptor[3] = {	EDGE_COMPATIBILITY_MASK0,
					EDGE_COMPATIBILITY_MASK1,
					EDGE_COMPATIBILITY_MASK2 };
L
Linus Torvalds 已提交
2845 2846 2847 2848

	dev = serial->dev;

	/* create our private serial structure */
2849
	edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2850
	if (!edge_serial)
L
Linus Torvalds 已提交
2851
		return -ENOMEM;
2852

L
Linus Torvalds 已提交
2853 2854 2855 2856 2857
	spin_lock_init(&edge_serial->es_lock);
	edge_serial->serial = serial;
	usb_set_serial_data(serial, edge_serial);

	/* get the name for the device from the device */
2858
	i = usb_string(dev, dev->descriptor.iManufacturer,
2859
	    &edge_serial->name[0], MAX_NAME_LEN+1);
2860 2861
	if (i < 0)
		i = 0;
2862
	edge_serial->name[i++] = ' ';
2863
	usb_string(dev, dev->descriptor.iProduct,
2864
	    &edge_serial->name[i], MAX_NAME_LEN+2 - i);
L
Linus Torvalds 已提交
2865 2866 2867

	dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);

2868
	/* Read the epic descriptor */
2869
	if (get_epic_descriptor(edge_serial) < 0) {
2870 2871 2872
		/* memcpy descriptor to Supports structures */
		memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
		       sizeof(struct edge_compatibility_bits));
L
Linus Torvalds 已提交
2873

2874
		/* get the manufacturing descriptor for this device */
A
Alan Cox 已提交
2875
		get_manufacturing_desc(edge_serial);
L
Linus Torvalds 已提交
2876

2877
		/* get the boot descriptor */
A
Alan Cox 已提交
2878
		get_boot_desc(edge_serial);
2879 2880 2881

		get_product_info(edge_serial);
	}
L
Linus Torvalds 已提交
2882 2883 2884

	/* set the number of ports from the manufacturing description */
	/* serial->num_ports = serial->product_info.NumPorts; */
2885 2886
	if ((!edge_serial->is_epic) &&
	    (edge_serial->product_info.NumPorts != serial->num_ports)) {
2887 2888
		dev_warn(ddev,
			"Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2889 2890
			 edge_serial->product_info.NumPorts,
			 serial->num_ports);
L
Linus Torvalds 已提交
2891 2892
	}

2893
	dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
L
Linus Torvalds 已提交
2894

2895 2896 2897
	/* If not an EPiC device */
	if (!edge_serial->is_epic) {
		/* now load the application firmware into this device */
A
Alan Cox 已提交
2898
		load_application_firmware(edge_serial);
L
Linus Torvalds 已提交
2899

2900
		dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
L
Linus Torvalds 已提交
2901

2902
		/* Check current Edgeport EEPROM and update if necessary */
A
Alan Cox 已提交
2903
		update_edgeport_E2PROM(edge_serial);
L
Linus Torvalds 已提交
2904

2905
		dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2906 2907

		/* set the configuration to use #1 */
2908
/*		dev_dbg(ddev, "set_configuration 1\n"); */
A
Alan Cox 已提交
2909
/*		usb_set_configuration (dev, 1); */
2910
	}
2911
	dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2912 2913 2914
	    edge_serial->product_info.FirmwareMajorVersion,
	    edge_serial->product_info.FirmwareMinorVersion,
	    le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
L
Linus Torvalds 已提交
2915

A
Alan Cox 已提交
2916
	/* we set up the pointers to the endpoints in the edge_open function,
L
Linus Torvalds 已提交
2917 2918
	 * as the structures aren't created yet. */

2919 2920 2921
	response = 0;

	if (edge_serial->is_epic) {
A
Alan Cox 已提交
2922 2923
		/* EPIC thing, set up our interrupt polling now and our read
		 * urb, so that the device knows it really is connected. */
2924
		interrupt_in_found = bulk_in_found = bulk_out_found = false;
A
Alan Cox 已提交
2925 2926
		for (i = 0; i < serial->interface->altsetting[0]
						.desc.bNumEndpoints; ++i) {
2927 2928 2929
			struct usb_endpoint_descriptor *endpoint;
			int buffer_size;

A
Alan Cox 已提交
2930 2931
			endpoint = &serial->interface->altsetting[0].
							endpoint[i].desc;
2932
			buffer_size = usb_endpoint_maxp(endpoint);
2933
			if (!interrupt_in_found &&
2934 2935
			    (usb_endpoint_is_int_in(endpoint))) {
				/* we found a interrupt in endpoint */
2936
				dev_dbg(ddev, "found interrupt in\n");
2937 2938

				/* not set up yet, so do it now */
A
Alan Cox 已提交
2939 2940
				edge_serial->interrupt_read_urb =
						usb_alloc_urb(0, GFP_KERNEL);
2941 2942 2943 2944
				if (!edge_serial->interrupt_read_urb) {
					response = -ENOMEM;
					break;
				}
2945

A
Alan Cox 已提交
2946 2947
				edge_serial->interrupt_in_buffer =
					kmalloc(buffer_size, GFP_KERNEL);
2948
				if (!edge_serial->interrupt_in_buffer) {
2949 2950
					response = -ENOMEM;
					break;
2951
				}
A
Alan Cox 已提交
2952 2953
				edge_serial->interrupt_in_endpoint =
						endpoint->bEndpointAddress;
2954 2955

				/* set up our interrupt urb */
A
Alan Cox 已提交
2956 2957 2958 2959 2960 2961 2962 2963 2964 2965
				usb_fill_int_urb(
					edge_serial->interrupt_read_urb,
					dev,
					usb_rcvintpipe(dev,
						endpoint->bEndpointAddress),
					edge_serial->interrupt_in_buffer,
					buffer_size,
					edge_interrupt_callback,
					edge_serial,
					endpoint->bInterval);
2966

2967
				interrupt_in_found = true;
2968 2969
			}

2970
			if (!bulk_in_found &&
A
Alan Cox 已提交
2971
				(usb_endpoint_is_bulk_in(endpoint))) {
2972
				/* we found a bulk in endpoint */
2973
				dev_dbg(ddev, "found bulk in\n");
2974 2975

				/* not set up yet, so do it now */
A
Alan Cox 已提交
2976 2977
				edge_serial->read_urb =
						usb_alloc_urb(0, GFP_KERNEL);
2978 2979 2980 2981
				if (!edge_serial->read_urb) {
					response = -ENOMEM;
					break;
				}
2982

A
Alan Cox 已提交
2983 2984
				edge_serial->bulk_in_buffer =
					kmalloc(buffer_size, GFP_KERNEL);
2985
				if (!edge_serial->bulk_in_buffer) {
2986 2987
					response = -ENOMEM;
					break;
2988
				}
A
Alan Cox 已提交
2989 2990
				edge_serial->bulk_in_endpoint =
						endpoint->bEndpointAddress;
2991 2992 2993

				/* set up our bulk in urb */
				usb_fill_bulk_urb(edge_serial->read_urb, dev,
A
Alan Cox 已提交
2994 2995 2996
					usb_rcvbulkpipe(dev,
						endpoint->bEndpointAddress),
					edge_serial->bulk_in_buffer,
2997
					usb_endpoint_maxp(endpoint),
A
Alan Cox 已提交
2998 2999
					edge_bulk_in_callback,
					edge_serial);
3000
				bulk_in_found = true;
3001 3002
			}

3003
			if (!bulk_out_found &&
3004 3005
			    (usb_endpoint_is_bulk_out(endpoint))) {
				/* we found a bulk out endpoint */
3006
				dev_dbg(ddev, "found bulk out\n");
A
Alan Cox 已提交
3007 3008
				edge_serial->bulk_out_endpoint =
						endpoint->bEndpointAddress;
3009
				bulk_out_found = true;
3010 3011 3012
			}
		}

3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028
		if (response || !interrupt_in_found || !bulk_in_found ||
							!bulk_out_found) {
			if (!response) {
				dev_err(ddev, "expected endpoints not found\n");
				response = -ENODEV;
			}

			usb_free_urb(edge_serial->interrupt_read_urb);
			kfree(edge_serial->interrupt_in_buffer);

			usb_free_urb(edge_serial->read_urb);
			kfree(edge_serial->bulk_in_buffer);

			kfree(edge_serial);

			return response;
3029 3030 3031 3032
		}

		/* start interrupt read for this edgeport this interrupt will
		 * continue as long as the edgeport is connected */
A
Alan Cox 已提交
3033 3034
		response = usb_submit_urb(edge_serial->interrupt_read_urb,
								GFP_KERNEL);
3035
		if (response)
3036
			dev_err(ddev, "%s - Error %d submitting control urb\n",
3037
				__func__, response);
3038 3039
	}
	return response;
L
Linus Torvalds 已提交
3040 3041 3042 3043
}


/****************************************************************************
3044
 * edge_disconnect
L
Linus Torvalds 已提交
3045 3046
 *	This function is called whenever the device is removed from the usb bus.
 ****************************************************************************/
3047
static void edge_disconnect(struct usb_serial *serial)
L
Linus Torvalds 已提交
3048
{
3049
	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
L
Linus Torvalds 已提交
3050

3051
	if (edge_serial->is_epic) {
3052 3053
		usb_kill_urb(edge_serial->interrupt_read_urb);
		usb_kill_urb(edge_serial->read_urb);
3054
	}
3055 3056 3057 3058 3059 3060 3061 3062 3063 3064
}


/****************************************************************************
 * edge_release
 *	This function is called when the device structure is deallocated.
 ****************************************************************************/
static void edge_release(struct usb_serial *serial)
{
	struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3065

3066 3067 3068 3069 3070 3071 3072 3073 3074 3075
	if (edge_serial->is_epic) {
		usb_kill_urb(edge_serial->interrupt_read_urb);
		usb_free_urb(edge_serial->interrupt_read_urb);
		kfree(edge_serial->interrupt_in_buffer);

		usb_kill_urb(edge_serial->read_urb);
		usb_free_urb(edge_serial->read_urb);
		kfree(edge_serial->bulk_in_buffer);
	}

3076
	kfree(edge_serial);
L
Linus Torvalds 已提交
3077 3078
}

3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104
static int edge_port_probe(struct usb_serial_port *port)
{
	struct edgeport_port *edge_port;

	edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
	if (!edge_port)
		return -ENOMEM;

	spin_lock_init(&edge_port->ep_lock);
	edge_port->port = port;

	usb_set_serial_port_data(port, edge_port);

	return 0;
}

static int edge_port_remove(struct usb_serial_port *port)
{
	struct edgeport_port *edge_port;

	edge_port = usb_get_serial_port_data(port);
	kfree(edge_port);

	return 0;
}

3105 3106 3107 3108 3109 3110 3111 3112
static struct usb_serial_driver edgeport_2port_device = {
	.driver = {
		.owner		= THIS_MODULE,
		.name		= "edgeport_2",
	},
	.description		= "Edgeport 2 port adapter",
	.id_table		= edgeport_2port_id_table,
	.num_ports		= 2,
3113 3114 3115
	.num_bulk_in		= 1,
	.num_bulk_out		= 1,
	.num_interrupt_in	= 1,
3116 3117 3118 3119 3120 3121 3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147
	.open			= edge_open,
	.close			= edge_close,
	.throttle		= edge_throttle,
	.unthrottle		= edge_unthrottle,
	.attach			= edge_startup,
	.disconnect		= edge_disconnect,
	.release		= edge_release,
	.port_probe		= edge_port_probe,
	.port_remove		= edge_port_remove,
	.ioctl			= edge_ioctl,
	.set_termios		= edge_set_termios,
	.tiocmget		= edge_tiocmget,
	.tiocmset		= edge_tiocmset,
	.tiocmiwait		= usb_serial_generic_tiocmiwait,
	.get_icount		= usb_serial_generic_get_icount,
	.write			= edge_write,
	.write_room		= edge_write_room,
	.chars_in_buffer	= edge_chars_in_buffer,
	.break_ctl		= edge_break,
	.read_int_callback	= edge_interrupt_callback,
	.read_bulk_callback	= edge_bulk_in_callback,
	.write_bulk_callback	= edge_bulk_out_data_callback,
};

static struct usb_serial_driver edgeport_4port_device = {
	.driver = {
		.owner		= THIS_MODULE,
		.name		= "edgeport_4",
	},
	.description		= "Edgeport 4 port adapter",
	.id_table		= edgeport_4port_id_table,
	.num_ports		= 4,
3148 3149 3150
	.num_bulk_in		= 1,
	.num_bulk_out		= 1,
	.num_interrupt_in	= 1,
3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182
	.open			= edge_open,
	.close			= edge_close,
	.throttle		= edge_throttle,
	.unthrottle		= edge_unthrottle,
	.attach			= edge_startup,
	.disconnect		= edge_disconnect,
	.release		= edge_release,
	.port_probe		= edge_port_probe,
	.port_remove		= edge_port_remove,
	.ioctl			= edge_ioctl,
	.set_termios		= edge_set_termios,
	.tiocmget		= edge_tiocmget,
	.tiocmset		= edge_tiocmset,
	.tiocmiwait		= usb_serial_generic_tiocmiwait,
	.get_icount		= usb_serial_generic_get_icount,
	.write			= edge_write,
	.write_room		= edge_write_room,
	.chars_in_buffer	= edge_chars_in_buffer,
	.break_ctl		= edge_break,
	.read_int_callback	= edge_interrupt_callback,
	.read_bulk_callback	= edge_bulk_in_callback,
	.write_bulk_callback	= edge_bulk_out_data_callback,
};

static struct usb_serial_driver edgeport_8port_device = {
	.driver = {
		.owner		= THIS_MODULE,
		.name		= "edgeport_8",
	},
	.description		= "Edgeport 8 port adapter",
	.id_table		= edgeport_8port_id_table,
	.num_ports		= 8,
3183 3184 3185
	.num_bulk_in		= 1,
	.num_bulk_out		= 1,
	.num_interrupt_in	= 1,
3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213 3214 3215 3216 3217
	.open			= edge_open,
	.close			= edge_close,
	.throttle		= edge_throttle,
	.unthrottle		= edge_unthrottle,
	.attach			= edge_startup,
	.disconnect		= edge_disconnect,
	.release		= edge_release,
	.port_probe		= edge_port_probe,
	.port_remove		= edge_port_remove,
	.ioctl			= edge_ioctl,
	.set_termios		= edge_set_termios,
	.tiocmget		= edge_tiocmget,
	.tiocmset		= edge_tiocmset,
	.tiocmiwait		= usb_serial_generic_tiocmiwait,
	.get_icount		= usb_serial_generic_get_icount,
	.write			= edge_write,
	.write_room		= edge_write_room,
	.chars_in_buffer	= edge_chars_in_buffer,
	.break_ctl		= edge_break,
	.read_int_callback	= edge_interrupt_callback,
	.read_bulk_callback	= edge_bulk_in_callback,
	.write_bulk_callback	= edge_bulk_out_data_callback,
};

static struct usb_serial_driver epic_device = {
	.driver = {
		.owner		= THIS_MODULE,
		.name		= "epic",
	},
	.description		= "EPiC device",
	.id_table		= Epic_port_id_table,
	.num_ports		= 1,
3218 3219 3220
	.num_bulk_in		= 1,
	.num_bulk_out		= 1,
	.num_interrupt_in	= 1,
3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249
	.open			= edge_open,
	.close			= edge_close,
	.throttle		= edge_throttle,
	.unthrottle		= edge_unthrottle,
	.attach			= edge_startup,
	.disconnect		= edge_disconnect,
	.release		= edge_release,
	.port_probe		= edge_port_probe,
	.port_remove		= edge_port_remove,
	.ioctl			= edge_ioctl,
	.set_termios		= edge_set_termios,
	.tiocmget		= edge_tiocmget,
	.tiocmset		= edge_tiocmset,
	.tiocmiwait		= usb_serial_generic_tiocmiwait,
	.get_icount		= usb_serial_generic_get_icount,
	.write			= edge_write,
	.write_room		= edge_write_room,
	.chars_in_buffer	= edge_chars_in_buffer,
	.break_ctl		= edge_break,
	.read_int_callback	= edge_interrupt_callback,
	.read_bulk_callback	= edge_bulk_in_callback,
	.write_bulk_callback	= edge_bulk_out_data_callback,
};

static struct usb_serial_driver * const serial_drivers[] = {
	&edgeport_2port_device, &edgeport_4port_device,
	&edgeport_8port_device, &epic_device, NULL
};

3250
module_usb_serial_driver(serial_drivers, id_table_combined);
L
Linus Torvalds 已提交
3251

A
Alan Cox 已提交
3252 3253
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
L
Linus Torvalds 已提交
3254
MODULE_LICENSE("GPL");
3255 3256 3257 3258
MODULE_FIRMWARE("edgeport/boot.fw");
MODULE_FIRMWARE("edgeport/boot2.fw");
MODULE_FIRMWARE("edgeport/down.fw");
MODULE_FIRMWARE("edgeport/down2.fw");