isp1301_omap.c 40.2 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
/*
 * isp1301_omap - ISP 1301 USB transceiver, talking to OMAP OTG controller
 *
 * Copyright (C) 2004 Texas Instruments
 * Copyright (C) 2004 David Brownell
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
27
#include <linux/platform_device.h>
D
David Brownell 已提交
28
#include <linux/gpio.h>
29
#include <linux/usb/ch9.h>
D
David Brownell 已提交
30
#include <linux/usb/gadget.h>
L
Linus Torvalds 已提交
31
#include <linux/usb.h>
32
#include <linux/usb/otg.h>
L
Linus Torvalds 已提交
33 34 35 36
#include <linux/i2c.h>
#include <linux/workqueue.h>

#include <asm/irq.h>
D
David Brownell 已提交
37 38
#include <asm/mach-types.h>

39 40
#include <plat/usb.h>
#include <plat/mux.h>
L
Linus Torvalds 已提交
41 42 43 44 45 46 47 48


#ifndef	DEBUG
#undef	VERBOSE
#endif


#define	DRIVER_VERSION	"24 August 2004"
49
#define	DRIVER_NAME	(isp1301_driver.driver.name)
L
Linus Torvalds 已提交
50 51 52 53 54

MODULE_DESCRIPTION("ISP1301 USB OTG Transceiver Driver");
MODULE_LICENSE("GPL");

struct isp1301 {
55
	struct usb_phy		phy;
56
	struct i2c_client	*client;
L
Linus Torvalds 已提交
57 58
	void			(*i2c_release)(struct device *dev);

59
	int			irq_type;
L
Linus Torvalds 已提交
60 61 62 63 64 65 66 67

	u32			last_otg_ctrl;
	unsigned		working:1;

	struct timer_list	timer;

	/* use keventd context to change the state for us */
	struct work_struct	work;
68

L
Linus Torvalds 已提交
69 70 71 72 73 74 75 76 77
	unsigned long		todo;
#		define WORK_UPDATE_ISP	0	/* update ISP from OTG */
#		define WORK_UPDATE_OTG	1	/* update OTG from ISP */
#		define WORK_HOST_RESUME	4	/* resume host */
#		define WORK_TIMER	6	/* timer fired */
#		define WORK_STOP	7	/* don't resubmit */
};


78
/* bits in OTG_CTRL */
L
Linus Torvalds 已提交
79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96

#define	OTG_XCEIV_OUTPUTS \
	(OTG_ASESSVLD|OTG_BSESSEND|OTG_BSESSVLD|OTG_VBUSVLD|OTG_ID)
#define	OTG_XCEIV_INPUTS \
	(OTG_PULLDOWN|OTG_PULLUP|OTG_DRV_VBUS|OTG_PD_VBUS|OTG_PU_VBUS|OTG_PU_ID)
#define	OTG_CTRL_BITS \
	(OTG_A_BUSREQ|OTG_A_SETB_HNPEN|OTG_B_BUSREQ|OTG_B_HNPEN|OTG_BUSDROP)
	/* and OTG_PULLUP is sometimes written */

#define	OTG_CTRL_MASK	(OTG_DRIVER_SEL| \
	OTG_XCEIV_OUTPUTS|OTG_XCEIV_INPUTS| \
	OTG_CTRL_BITS)


/*-------------------------------------------------------------------------*/

/* board-specific PM hooks */

D
David Brownell 已提交
97
#if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
L
Linus Torvalds 已提交
98 99 100

#if	defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)

101
#include <linux/i2c/tps65010.h>
L
Linus Torvalds 已提交
102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119

#else

static inline int tps65010_set_vbus_draw(unsigned mA)
{
	pr_debug("tps65010: draw %d mA (STUB)\n", mA);
	return 0;
}

#endif

static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
{
	int status = tps65010_set_vbus_draw(mA);
	if (status < 0)
		pr_debug("  VBUS %d mA error %d\n", mA, status);
}

A
Anand Gadiyar 已提交
120
#else
D
David Brownell 已提交
121 122 123 124 125 126 127 128 129

static void enable_vbus_draw(struct isp1301 *isp, unsigned mA)
{
	/* H4 controls this by DIP switch S2.4; no soft control.
	 * ON means the charger is always enabled.  Leave it OFF
	 * unless the OTG port is used only in B-peripheral mode.
	 */
}

A
Anand Gadiyar 已提交
130 131
#endif

D
David Brownell 已提交
132 133 134 135 136 137 138 139 140 141 142 143 144 145 146
static void enable_vbus_source(struct isp1301 *isp)
{
	/* this board won't supply more than 8mA vbus power.
	 * some boards can switch a 100ma "unit load" (or more).
	 */
}


/* products will deliver OTG messages with LEDs, GUI, etc */
static inline void notresponding(struct isp1301 *isp)
{
	printk(KERN_NOTICE "OTG device not responding.\n");
}


L
Linus Torvalds 已提交
147 148 149 150 151 152 153 154 155
/*-------------------------------------------------------------------------*/

static struct i2c_driver isp1301_driver;

/* smbus apis are used for portability */

static inline u8
isp1301_get_u8(struct isp1301 *isp, u8 reg)
{
156
	return i2c_smbus_read_byte_data(isp->client, reg + 0);
L
Linus Torvalds 已提交
157 158 159 160 161
}

static inline int
isp1301_get_u16(struct isp1301 *isp, u8 reg)
{
162
	return i2c_smbus_read_word_data(isp->client, reg);
L
Linus Torvalds 已提交
163 164 165 166 167
}

static inline int
isp1301_set_bits(struct isp1301 *isp, u8 reg, u8 bits)
{
168
	return i2c_smbus_write_byte_data(isp->client, reg + 0, bits);
L
Linus Torvalds 已提交
169 170 171 172 173
}

static inline int
isp1301_clear_bits(struct isp1301 *isp, u8 reg, u8 bits)
{
174
	return i2c_smbus_write_byte_data(isp->client, reg + 1, bits);
L
Linus Torvalds 已提交
175 176 177 178 179 180 181 182 183 184 185 186 187 188
}

/*-------------------------------------------------------------------------*/

/* identification */
#define	ISP1301_VENDOR_ID		0x00	/* u16 read */
#define	ISP1301_PRODUCT_ID		0x02	/* u16 read */
#define	ISP1301_BCD_DEVICE		0x14	/* u16 read */

#define	I2C_VENDOR_ID_PHILIPS		0x04cc
#define	I2C_PRODUCT_ID_PHILIPS_1301	0x1301

/* operational registers */
#define	ISP1301_MODE_CONTROL_1		0x04	/* u8 read, set, +1 clear */
189 190
#	define	MC1_SPEED		(1 << 0)
#	define	MC1_SUSPEND		(1 << 1)
L
Linus Torvalds 已提交
191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238
#	define	MC1_DAT_SE0		(1 << 2)
#	define	MC1_TRANSPARENT		(1 << 3)
#	define	MC1_BDIS_ACON_EN	(1 << 4)
#	define	MC1_OE_INT_EN		(1 << 5)
#	define	MC1_UART_EN		(1 << 6)
#	define	MC1_MASK		0x7f
#define	ISP1301_MODE_CONTROL_2		0x12	/* u8 read, set, +1 clear */
#	define	MC2_GLOBAL_PWR_DN	(1 << 0)
#	define	MC2_SPD_SUSP_CTRL	(1 << 1)
#	define	MC2_BI_DI		(1 << 2)
#	define	MC2_TRANSP_BDIR0	(1 << 3)
#	define	MC2_TRANSP_BDIR1	(1 << 4)
#	define	MC2_AUDIO_EN		(1 << 5)
#	define	MC2_PSW_EN		(1 << 6)
#	define	MC2_EN2V7		(1 << 7)
#define	ISP1301_OTG_CONTROL_1		0x06	/* u8 read, set, +1 clear */
#	define	OTG1_DP_PULLUP		(1 << 0)
#	define	OTG1_DM_PULLUP		(1 << 1)
#	define	OTG1_DP_PULLDOWN	(1 << 2)
#	define	OTG1_DM_PULLDOWN	(1 << 3)
#	define	OTG1_ID_PULLDOWN	(1 << 4)
#	define	OTG1_VBUS_DRV		(1 << 5)
#	define	OTG1_VBUS_DISCHRG	(1 << 6)
#	define	OTG1_VBUS_CHRG		(1 << 7)
#define	ISP1301_OTG_STATUS		0x10	/* u8 readonly */
#	define	OTG_B_SESS_END		(1 << 6)
#	define	OTG_B_SESS_VLD		(1 << 7)

#define	ISP1301_INTERRUPT_SOURCE	0x08	/* u8 read */
#define	ISP1301_INTERRUPT_LATCH		0x0A	/* u8 read, set, +1 clear */

#define	ISP1301_INTERRUPT_FALLING	0x0C	/* u8 read, set, +1 clear */
#define	ISP1301_INTERRUPT_RISING	0x0E	/* u8 read, set, +1 clear */

/* same bitfields in all interrupt registers */
#	define	INTR_VBUS_VLD		(1 << 0)
#	define	INTR_SESS_VLD		(1 << 1)
#	define	INTR_DP_HI		(1 << 2)
#	define	INTR_ID_GND		(1 << 3)
#	define	INTR_DM_HI		(1 << 4)
#	define	INTR_ID_FLOAT		(1 << 5)
#	define	INTR_BDIS_ACON		(1 << 6)
#	define	INTR_CR_INT		(1 << 7)

/*-------------------------------------------------------------------------*/

static inline const char *state_name(struct isp1301 *isp)
{
239
	return otg_state_string(isp->phy.state);
L
Linus Torvalds 已提交
240 241 242 243 244 245 246 247 248 249 250 251 252 253
}

/*-------------------------------------------------------------------------*/

/* NOTE:  some of this ISP1301 setup is specific to H2 boards;
 * not everything is guarded by board-specific checks, or even using
 * omap_usb_config data to deduce MC1_DAT_SE0 and MC2_BI_DI.
 *
 * ALSO:  this currently doesn't use ISP1301 low-power modes
 * while OTG is running.
 */

static void power_down(struct isp1301 *isp)
{
254
	isp->phy.state = OTG_STATE_UNDEFINED;
L
Linus Torvalds 已提交
255 256

	// isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
257
	isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
L
Linus Torvalds 已提交
258 259 260 261 262 263 264 265

	isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_ID_PULLDOWN);
	isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
}

static void power_up(struct isp1301 *isp)
{
	// isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN);
266
	isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_SUSPEND);
267

L
Linus Torvalds 已提交
268 269 270 271 272 273 274 275 276 277 278 279 280 281 282
	/* do this only when cpu is driving transceiver,
	 * so host won't see a low speed device...
	 */
	isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);
}

#define	NO_HOST_SUSPEND

static int host_suspend(struct isp1301 *isp)
{
#ifdef	NO_HOST_SUSPEND
	return 0;
#else
	struct device	*dev;

283
	if (!isp->phy.otg->host)
L
Linus Torvalds 已提交
284 285 286 287 288
		return -ENODEV;

	/* Currently ASSUMES only the OTG port matters;
	 * other ports could be active...
	 */
289
	dev = isp->phy.otg->host->controller;
L
Linus Torvalds 已提交
290 291 292 293 294 295 296 297 298 299 300
	return dev->driver->suspend(dev, 3, 0);
#endif
}

static int host_resume(struct isp1301 *isp)
{
#ifdef	NO_HOST_SUSPEND
	return 0;
#else
	struct device	*dev;

301
	if (!isp->phy.otg->host)
L
Linus Torvalds 已提交
302 303
		return -ENODEV;

304
	dev = isp->phy.otg->host->controller;
L
Linus Torvalds 已提交
305 306 307 308 309 310
	return dev->driver->resume(dev, 0);
#endif
}

static int gadget_suspend(struct isp1301 *isp)
{
311 312 313 314
	isp->phy.otg->gadget->b_hnp_enable = 0;
	isp->phy.otg->gadget->a_hnp_support = 0;
	isp->phy.otg->gadget->a_alt_hnp_support = 0;
	return usb_gadget_vbus_disconnect(isp->phy.otg->gadget);
L
Linus Torvalds 已提交
315 316 317 318 319 320 321 322 323 324 325
}

/*-------------------------------------------------------------------------*/

#define	TIMER_MINUTES	10
#define	TIMER_JIFFIES	(TIMER_MINUTES * 60 * HZ)

/* Almost all our I2C messaging comes from a work queue's task context.
 * NOTE: guaranteeing certain response times might mean we shouldn't
 * share keventd's work queue; a realtime task might be safest.
 */
D
David Brownell 已提交
326
static void isp1301_defer_work(struct isp1301 *isp, int work)
L
Linus Torvalds 已提交
327 328 329 330
{
	int status;

	if (isp && !test_and_set_bit(work, &isp->todo)) {
331
		(void) get_device(&isp->client->dev);
L
Linus Torvalds 已提交
332 333
		status = schedule_work(&isp->work);
		if (!status && !isp->working)
334
			dev_vdbg(&isp->client->dev,
L
Linus Torvalds 已提交
335 336 337 338 339 340 341
				"work item %d may be lost\n", work);
	}
}

/* called from irq handlers */
static void a_idle(struct isp1301 *isp, const char *tag)
{
342 343
	u32 l;

344
	if (isp->phy.state == OTG_STATE_A_IDLE)
L
Linus Torvalds 已提交
345 346
		return;

347 348 349
	isp->phy.otg->default_a = 1;
	if (isp->phy.otg->host) {
		isp->phy.otg->host->is_b_host = 0;
L
Linus Torvalds 已提交
350 351
		host_suspend(isp);
	}
352 353
	if (isp->phy.otg->gadget) {
		isp->phy.otg->gadget->is_a_peripheral = 1;
L
Linus Torvalds 已提交
354 355
		gadget_suspend(isp);
	}
356
	isp->phy.state = OTG_STATE_A_IDLE;
357 358 359
	l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
	omap_writel(l, OTG_CTRL);
	isp->last_otg_ctrl = l;
L
Linus Torvalds 已提交
360 361 362 363 364 365
	pr_debug("  --> %s/%s\n", state_name(isp), tag);
}

/* called from irq handlers */
static void b_idle(struct isp1301 *isp, const char *tag)
{
366 367
	u32 l;

368
	if (isp->phy.state == OTG_STATE_B_IDLE)
L
Linus Torvalds 已提交
369 370
		return;

371 372 373
	isp->phy.otg->default_a = 0;
	if (isp->phy.otg->host) {
		isp->phy.otg->host->is_b_host = 1;
L
Linus Torvalds 已提交
374 375
		host_suspend(isp);
	}
376 377
	if (isp->phy.otg->gadget) {
		isp->phy.otg->gadget->is_a_peripheral = 0;
L
Linus Torvalds 已提交
378 379
		gadget_suspend(isp);
	}
380
	isp->phy.state = OTG_STATE_B_IDLE;
381 382 383
	l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
	omap_writel(l, OTG_CTRL);
	isp->last_otg_ctrl = l;
L
Linus Torvalds 已提交
384 385 386 387 388 389 390 391 392 393 394 395
	pr_debug("  --> %s/%s\n", state_name(isp), tag);
}

static void
dump_regs(struct isp1301 *isp, const char *label)
{
#ifdef	DEBUG
	u8	ctrl = isp1301_get_u8(isp, ISP1301_OTG_CONTROL_1);
	u8	status = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
	u8	src = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);

	pr_debug("otg: %06x, %s %s, otg/%02x stat/%02x.%02x\n",
396
		omap_readl(OTG_CTRL), label, state_name(isp),
L
Linus Torvalds 已提交
397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418
		ctrl, status, src);
	/* mode control and irq enables don't change much */
#endif
}

/*-------------------------------------------------------------------------*/

#ifdef	CONFIG_USB_OTG

/*
 * The OMAP OTG controller handles most of the OTG state transitions.
 *
 * We translate isp1301 outputs (mostly voltage comparator status) into
 * OTG inputs; OTG outputs (mostly pullup/pulldown controls) and HNP state
 * flags into isp1301 inputs ... and infer state transitions.
 */

#ifdef	VERBOSE

static void check_state(struct isp1301 *isp, const char *tag)
{
	enum usb_otg_state	state = OTG_STATE_UNDEFINED;
419
	u8			fsm = omap_readw(OTG_TEST) & 0x0ff;
L
Linus Torvalds 已提交
420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480
	unsigned		extra = 0;

	switch (fsm) {

	/* default-b */
	case 0x0:
		state = OTG_STATE_B_IDLE;
		break;
	case 0x3:
	case 0x7:
		extra = 1;
	case 0x1:
		state = OTG_STATE_B_PERIPHERAL;
		break;
	case 0x11:
		state = OTG_STATE_B_SRP_INIT;
		break;

	/* extra dual-role default-b states */
	case 0x12:
	case 0x13:
	case 0x16:
		extra = 1;
	case 0x17:
		state = OTG_STATE_B_WAIT_ACON;
		break;
	case 0x34:
		state = OTG_STATE_B_HOST;
		break;

	/* default-a */
	case 0x36:
		state = OTG_STATE_A_IDLE;
		break;
	case 0x3c:
		state = OTG_STATE_A_WAIT_VFALL;
		break;
	case 0x7d:
		state = OTG_STATE_A_VBUS_ERR;
		break;
	case 0x9e:
	case 0x9f:
		extra = 1;
	case 0x89:
		state = OTG_STATE_A_PERIPHERAL;
		break;
	case 0xb7:
		state = OTG_STATE_A_WAIT_VRISE;
		break;
	case 0xb8:
		state = OTG_STATE_A_WAIT_BCON;
		break;
	case 0xb9:
		state = OTG_STATE_A_HOST;
		break;
	case 0xba:
		state = OTG_STATE_A_SUSPEND;
		break;
	default:
		break;
	}
481
	if (isp->phy.state == state && !extra)
L
Linus Torvalds 已提交
482 483
		return;
	pr_debug("otg: %s FSM %s/%02x, %s, %06x\n", tag,
484
		otg_state_string(state), fsm, state_name(isp),
485
		omap_readl(OTG_CTRL));
L
Linus Torvalds 已提交
486 487 488 489 490 491 492 493 494 495 496 497 498
}

#else

static inline void check_state(struct isp1301 *isp, const char *tag) { }

#endif

/* outputs from ISP1301_INTERRUPT_SOURCE */
static void update_otg1(struct isp1301 *isp, u8 int_src)
{
	u32	otg_ctrl;

499 500 501 502
	otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
	otg_ctrl &= ~OTG_XCEIV_INPUTS;
	otg_ctrl &= ~(OTG_ID|OTG_ASESSVLD|OTG_VBUSVLD);

L
Linus Torvalds 已提交
503 504
	if (int_src & INTR_SESS_VLD)
		otg_ctrl |= OTG_ASESSVLD;
505
	else if (isp->phy.state == OTG_STATE_A_WAIT_VFALL) {
L
Linus Torvalds 已提交
506 507 508 509 510 511
		a_idle(isp, "vfall");
		otg_ctrl &= ~OTG_CTRL_BITS;
	}
	if (int_src & INTR_VBUS_VLD)
		otg_ctrl |= OTG_VBUSVLD;
	if (int_src & INTR_ID_GND) {		/* default-A */
512 513 514
		if (isp->phy.state == OTG_STATE_B_IDLE
				|| isp->phy.state
					== OTG_STATE_UNDEFINED) {
L
Linus Torvalds 已提交
515 516 517 518 519
			a_idle(isp, "init");
			return;
		}
	} else {				/* default-B */
		otg_ctrl |= OTG_ID;
520 521
		if (isp->phy.state == OTG_STATE_A_IDLE
			|| isp->phy.state == OTG_STATE_UNDEFINED) {
L
Linus Torvalds 已提交
522 523 524 525
			b_idle(isp, "init");
			return;
		}
	}
526
	omap_writel(otg_ctrl, OTG_CTRL);
L
Linus Torvalds 已提交
527 528 529 530 531 532 533
}

/* outputs from ISP1301_OTG_STATUS */
static void update_otg2(struct isp1301 *isp, u8 otg_status)
{
	u32	otg_ctrl;

534 535 536
	otg_ctrl = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
	otg_ctrl &= ~OTG_XCEIV_INPUTS;
	otg_ctrl &= ~(OTG_BSESSVLD | OTG_BSESSEND);
L
Linus Torvalds 已提交
537 538 539 540
	if (otg_status & OTG_B_SESS_VLD)
		otg_ctrl |= OTG_BSESSVLD;
	else if (otg_status & OTG_B_SESS_END)
		otg_ctrl |= OTG_BSESSEND;
541
	omap_writel(otg_ctrl, OTG_CTRL);
L
Linus Torvalds 已提交
542 543 544 545 546 547 548 549
}

/* inputs going to ISP1301 */
static void otg_update_isp(struct isp1301 *isp)
{
	u32	otg_ctrl, otg_change;
	u8	set = OTG1_DM_PULLDOWN, clr = OTG1_DM_PULLUP;

550
	otg_ctrl = omap_readl(OTG_CTRL);
L
Linus Torvalds 已提交
551 552 553 554
	otg_change = otg_ctrl ^ isp->last_otg_ctrl;
	isp->last_otg_ctrl = otg_ctrl;
	otg_ctrl = otg_ctrl & OTG_XCEIV_INPUTS;

555
	switch (isp->phy.state) {
L
Linus Torvalds 已提交
556 557 558 559 560
	case OTG_STATE_B_IDLE:
	case OTG_STATE_B_PERIPHERAL:
	case OTG_STATE_B_SRP_INIT:
		if (!(otg_ctrl & OTG_PULLUP)) {
			// if (otg_ctrl & OTG_B_HNPEN) {
561 562
			if (isp->phy.otg->gadget->b_hnp_enable) {
				isp->phy.state = OTG_STATE_B_WAIT_ACON;
L
Linus Torvalds 已提交
563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588
				pr_debug("  --> b_wait_acon\n");
			}
			goto pulldown;
		}
pullup:
		set |= OTG1_DP_PULLUP;
		clr |= OTG1_DP_PULLDOWN;
		break;
	case OTG_STATE_A_SUSPEND:
	case OTG_STATE_A_PERIPHERAL:
		if (otg_ctrl & OTG_PULLUP)
			goto pullup;
		/* FALLTHROUGH */
	// case OTG_STATE_B_WAIT_ACON:
	default:
pulldown:
		set |= OTG1_DP_PULLDOWN;
		clr |= OTG1_DP_PULLUP;
		break;
	}

#	define toggle(OTG,ISP) do { \
		if (otg_ctrl & OTG) set |= ISP; \
		else clr |= ISP; \
		} while (0)

589
	if (!(isp->phy.otg->host))
L
Linus Torvalds 已提交
590 591
		otg_ctrl &= ~OTG_DRV_VBUS;

592
	switch (isp->phy.state) {
L
Linus Torvalds 已提交
593 594 595 596 597 598 599 600 601 602
	case OTG_STATE_A_SUSPEND:
		if (otg_ctrl & OTG_DRV_VBUS) {
			set |= OTG1_VBUS_DRV;
			break;
		}
		/* HNP failed for some reason (A_AIDL_BDIS timeout) */
		notresponding(isp);

		/* FALLTHROUGH */
	case OTG_STATE_A_VBUS_ERR:
603
		isp->phy.state = OTG_STATE_A_WAIT_VFALL;
L
Linus Torvalds 已提交
604 605 606 607 608 609 610 611
		pr_debug("  --> a_wait_vfall\n");
		/* FALLTHROUGH */
	case OTG_STATE_A_WAIT_VFALL:
		/* FIXME usbcore thinks port power is still on ... */
		clr |= OTG1_VBUS_DRV;
		break;
	case OTG_STATE_A_IDLE:
		if (otg_ctrl & OTG_DRV_VBUS) {
612
			isp->phy.state = OTG_STATE_A_WAIT_VRISE;
L
Linus Torvalds 已提交
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629
			pr_debug("  --> a_wait_vrise\n");
		}
		/* FALLTHROUGH */
	default:
		toggle(OTG_DRV_VBUS, OTG1_VBUS_DRV);
	}

	toggle(OTG_PU_VBUS, OTG1_VBUS_CHRG);
	toggle(OTG_PD_VBUS, OTG1_VBUS_DISCHRG);

#	undef toggle

	isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, set);
	isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, clr);

	/* HNP switch to host or peripheral; and SRP */
	if (otg_change & OTG_PULLUP) {
630 631
		u32 l;

632
		switch (isp->phy.state) {
L
Linus Torvalds 已提交
633 634 635
		case OTG_STATE_B_IDLE:
			if (clr & OTG1_DP_PULLUP)
				break;
636
			isp->phy.state = OTG_STATE_B_PERIPHERAL;
L
Linus Torvalds 已提交
637 638 639 640 641
			pr_debug("  --> b_peripheral\n");
			break;
		case OTG_STATE_A_SUSPEND:
			if (clr & OTG1_DP_PULLUP)
				break;
642
			isp->phy.state = OTG_STATE_A_PERIPHERAL;
L
Linus Torvalds 已提交
643 644 645 646 647
			pr_debug("  --> a_peripheral\n");
			break;
		default:
			break;
		}
648 649 650
		l = omap_readl(OTG_CTRL);
		l |= OTG_PULLUP;
		omap_writel(l, OTG_CTRL);
L
Linus Torvalds 已提交
651 652
	}

653
	check_state(isp, __func__);
L
Linus Torvalds 已提交
654 655 656
	dump_regs(isp, "otg->isp1301");
}

657
static irqreturn_t omap_otg_irq(int irq, void *_isp)
L
Linus Torvalds 已提交
658
{
659
	u16		otg_irq = omap_readw(OTG_IRQ_SRC);
L
Linus Torvalds 已提交
660 661 662
	u32		otg_ctrl;
	int		ret = IRQ_NONE;
	struct isp1301	*isp = _isp;
663
	struct usb_otg	*otg = isp->phy.otg;
L
Linus Torvalds 已提交
664

665
	/* update ISP1301 transceiver from OTG controller */
L
Linus Torvalds 已提交
666
	if (otg_irq & OPRT_CHG) {
667
		omap_writew(OPRT_CHG, OTG_IRQ_SRC);
L
Linus Torvalds 已提交
668 669 670 671 672
		isp1301_defer_work(isp, WORK_UPDATE_ISP);
		ret = IRQ_HANDLED;

	/* SRP to become b_peripheral failed */
	} else if (otg_irq & B_SRP_TMROUT) {
673
		pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
L
Linus Torvalds 已提交
674 675 676 677 678 679
		notresponding(isp);

		/* gadget drivers that care should monitor all kinds of
		 * remote wakeup (SRP, normal) using their own timer
		 * to give "check cable and A-device" messages.
		 */
680
		if (isp->phy.state == OTG_STATE_B_SRP_INIT)
L
Linus Torvalds 已提交
681 682
			b_idle(isp, "srp_timeout");

683
		omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
L
Linus Torvalds 已提交
684 685 686 687 688
		ret = IRQ_HANDLED;

	/* HNP to become b_host failed */
	} else if (otg_irq & B_HNP_FAIL) {
		pr_debug("otg: %s B_HNP_FAIL, %06x\n",
689
				state_name(isp), omap_readl(OTG_CTRL));
L
Linus Torvalds 已提交
690 691
		notresponding(isp);

692
		otg_ctrl = omap_readl(OTG_CTRL);
L
Linus Torvalds 已提交
693 694
		otg_ctrl |= OTG_BUSDROP;
		otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
695
		omap_writel(otg_ctrl, OTG_CTRL);
L
Linus Torvalds 已提交
696 697

		/* subset of b_peripheral()... */
698
		isp->phy.state = OTG_STATE_B_PERIPHERAL;
L
Linus Torvalds 已提交
699 700
		pr_debug("  --> b_peripheral\n");

701
		omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
L
Linus Torvalds 已提交
702 703 704 705 706
		ret = IRQ_HANDLED;

	/* detect SRP from B-device ... */
	} else if (otg_irq & A_SRP_DETECT) {
		pr_debug("otg: %s SRP_DETECT, %06x\n",
707
				state_name(isp), omap_readl(OTG_CTRL));
L
Linus Torvalds 已提交
708 709

		isp1301_defer_work(isp, WORK_UPDATE_OTG);
710
		switch (isp->phy.state) {
L
Linus Torvalds 已提交
711
		case OTG_STATE_A_IDLE:
712
			if (!otg->host)
L
Linus Torvalds 已提交
713 714
				break;
			isp1301_defer_work(isp, WORK_HOST_RESUME);
715
			otg_ctrl = omap_readl(OTG_CTRL);
L
Linus Torvalds 已提交
716 717 718 719
			otg_ctrl |= OTG_A_BUSREQ;
			otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
					& ~OTG_XCEIV_INPUTS
					& OTG_CTRL_MASK;
720
			omap_writel(otg_ctrl, OTG_CTRL);
L
Linus Torvalds 已提交
721 722 723 724 725
			break;
		default:
			break;
		}

726
		omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
L
Linus Torvalds 已提交
727 728 729 730 731 732
		ret = IRQ_HANDLED;

	/* timer expired:  T(a_wait_bcon) and maybe T(a_wait_vrise)
	 * we don't track them separately
	 */
	} else if (otg_irq & A_REQ_TMROUT) {
733
		otg_ctrl = omap_readl(OTG_CTRL);
L
Linus Torvalds 已提交
734 735 736 737 738 739
		pr_info("otg: BCON_TMOUT from %s, %06x\n",
				state_name(isp), otg_ctrl);
		notresponding(isp);

		otg_ctrl |= OTG_BUSDROP;
		otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
740
		omap_writel(otg_ctrl, OTG_CTRL);
741
		isp->phy.state = OTG_STATE_A_WAIT_VFALL;
L
Linus Torvalds 已提交
742

743
		omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
L
Linus Torvalds 已提交
744 745 746 747
		ret = IRQ_HANDLED;

	/* A-supplied voltage fell too low; overcurrent */
	} else if (otg_irq & A_VBUS_ERR) {
748
		otg_ctrl = omap_readl(OTG_CTRL);
L
Linus Torvalds 已提交
749 750 751 752 753
		printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
			state_name(isp), otg_irq, otg_ctrl);

		otg_ctrl |= OTG_BUSDROP;
		otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
754
		omap_writel(otg_ctrl, OTG_CTRL);
755
		isp->phy.state = OTG_STATE_A_VBUS_ERR;
L
Linus Torvalds 已提交
756

757
		omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
L
Linus Torvalds 已提交
758 759
		ret = IRQ_HANDLED;

760
	/* switch driver; the transceiver code activates it,
L
Linus Torvalds 已提交
761 762 763 764 765
	 * ungating the udc clock or resuming OHCI.
	 */
	} else if (otg_irq & DRIVER_SWITCH) {
		int	kick = 0;

766
		otg_ctrl = omap_readl(OTG_CTRL);
L
Linus Torvalds 已提交
767 768 769 770 771 772 773 774 775
		printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
				state_name(isp),
				(otg_ctrl & OTG_DRIVER_SEL)
					? "gadget" : "host",
				otg_ctrl);
		isp1301_defer_work(isp, WORK_UPDATE_ISP);

		/* role is peripheral */
		if (otg_ctrl & OTG_DRIVER_SEL) {
776
			switch (isp->phy.state) {
L
Linus Torvalds 已提交
777
			case OTG_STATE_A_IDLE:
778
				b_idle(isp, __func__);
L
Linus Torvalds 已提交
779 780 781 782 783 784 785 786 787
				break;
			default:
				break;
			}
			isp1301_defer_work(isp, WORK_UPDATE_ISP);

		/* role is host */
		} else {
			if (!(otg_ctrl & OTG_ID)) {
788
				otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
789
				omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
L
Linus Torvalds 已提交
790 791
			}

792 793
			if (otg->host) {
				switch (isp->phy.state) {
L
Linus Torvalds 已提交
794
				case OTG_STATE_B_WAIT_ACON:
795
					isp->phy.state = OTG_STATE_B_HOST;
L
Linus Torvalds 已提交
796 797 798 799
					pr_debug("  --> b_host\n");
					kick = 1;
					break;
				case OTG_STATE_A_WAIT_BCON:
800
					isp->phy.state = OTG_STATE_A_HOST;
L
Linus Torvalds 已提交
801 802 803
					pr_debug("  --> a_host\n");
					break;
				case OTG_STATE_A_PERIPHERAL:
804
					isp->phy.state = OTG_STATE_A_WAIT_BCON;
L
Linus Torvalds 已提交
805 806 807 808 809 810 811 812 813
					pr_debug("  --> a_wait_bcon\n");
					break;
				default:
					break;
				}
				isp1301_defer_work(isp, WORK_HOST_RESUME);
			}
		}

814
		omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
L
Linus Torvalds 已提交
815 816 817
		ret = IRQ_HANDLED;

		if (kick)
818
			usb_bus_start_enum(otg->host, otg->host->otg_port);
L
Linus Torvalds 已提交
819 820
	}

821
	check_state(isp, __func__);
L
Linus Torvalds 已提交
822 823 824 825 826
	return ret;
}

static struct platform_device *otg_dev;

827
static int isp1301_otg_init(struct isp1301 *isp)
L
Linus Torvalds 已提交
828
{
829 830
	u32 l;

L
Linus Torvalds 已提交
831 832 833
	if (!otg_dev)
		return -ENODEV;

834
	dump_regs(isp, __func__);
L
Linus Torvalds 已提交
835
	/* some of these values are board-specific... */
836 837
	l = omap_readl(OTG_SYSCON_2);
	l |= OTG_EN
L
Linus Torvalds 已提交
838 839 840 841 842 843 844 845 846
		/* for B-device: */
		| SRP_GPDATA		/* 9msec Bdev D+ pulse */
		| SRP_GPDVBUS		/* discharge after VBUS pulse */
		// | (3 << 24)		/* 2msec VBUS pulse */
		/* for A-device: */
		| (0 << 20)		/* 200ms nominal A_WAIT_VRISE timer */
		| SRP_DPW		/* detect 167+ns SRP pulses */
		| SRP_DATA | SRP_VBUS	/* accept both kinds of SRP pulse */
		;
847
	omap_writel(l, OTG_SYSCON_2);
L
Linus Torvalds 已提交
848 849 850 851

	update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
	update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));

852
	check_state(isp, __func__);
L
Linus Torvalds 已提交
853
	pr_debug("otg: %s, %s %06x\n",
854
			state_name(isp), __func__, omap_readl(OTG_CTRL));
L
Linus Torvalds 已提交
855

856
	omap_writew(DRIVER_SWITCH | OPRT_CHG
L
Linus Torvalds 已提交
857
			| B_SRP_TMROUT | B_HNP_FAIL
858 859 860 861 862
			| A_VBUS_ERR | A_SRP_DETECT | A_REQ_TMROUT, OTG_IRQ_EN);

	l = omap_readl(OTG_SYSCON_2);
	l |= OTG_EN;
	omap_writel(l, OTG_SYSCON_2);
L
Linus Torvalds 已提交
863 864 865 866

	return 0;
}

867
static int otg_probe(struct platform_device *dev)
L
Linus Torvalds 已提交
868 869 870
{
	// struct omap_usb_config *config = dev->platform_data;

871
	otg_dev = dev;
L
Linus Torvalds 已提交
872 873 874
	return 0;
}

875
static int otg_remove(struct platform_device *dev)
L
Linus Torvalds 已提交
876
{
D
David Brownell 已提交
877
	otg_dev = NULL;
L
Linus Torvalds 已提交
878 879 880
	return 0;
}

D
David Brownell 已提交
881
static struct platform_driver omap_otg_driver = {
L
Linus Torvalds 已提交
882
	.probe		= otg_probe,
883 884 885 886 887
	.remove		= otg_remove,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "omap_otg",
	},
L
Linus Torvalds 已提交
888 889 890 891 892 893 894 895 896
};

static int otg_bind(struct isp1301 *isp)
{
	int	status;

	if (otg_dev)
		return -EBUSY;

897
	status = platform_driver_register(&omap_otg_driver);
L
Linus Torvalds 已提交
898 899 900 901 902
	if (status < 0)
		return status;

	if (otg_dev)
		status = request_irq(otg_dev->resource[1].start, omap_otg_irq,
Y
Yong Zhang 已提交
903
				0, DRIVER_NAME, isp);
L
Linus Torvalds 已提交
904 905 906 907
	else
		status = -ENODEV;

	if (status < 0)
908
		platform_driver_unregister(&omap_otg_driver);
L
Linus Torvalds 已提交
909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928
	return status;
}

static void otg_unbind(struct isp1301 *isp)
{
	if (!otg_dev)
		return;
	free_irq(otg_dev->resource[1].start, isp);
}

#else

/* OTG controller isn't clocked */

#endif	/* CONFIG_USB_OTG */

/*-------------------------------------------------------------------------*/

static void b_peripheral(struct isp1301 *isp)
{
929 930 931 932 933
	u32 l;

	l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
	omap_writel(l, OTG_CTRL);

934
	usb_gadget_vbus_connect(isp->phy.otg->gadget);
L
Linus Torvalds 已提交
935 936 937 938 939 940 941 942 943

#ifdef	CONFIG_USB_OTG
	enable_vbus_draw(isp, 8);
	otg_update_isp(isp);
#else
	enable_vbus_draw(isp, 100);
	/* UDC driver just set OTG_BSESSVLD */
	isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLUP);
	isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_DP_PULLDOWN);
944
	isp->phy.state = OTG_STATE_B_PERIPHERAL;
L
Linus Torvalds 已提交
945 946 947 948 949 950 951
	pr_debug("  --> b_peripheral\n");
	dump_regs(isp, "2periph");
#endif
}

static void isp_update_otg(struct isp1301 *isp, u8 stat)
{
952
	struct usb_otg		*otg = isp->phy.otg;
L
Linus Torvalds 已提交
953
	u8			isp_stat, isp_bstat;
954
	enum usb_otg_state	state = isp->phy.state;
L
Linus Torvalds 已提交
955 956 957 958 959 960 961

	if (stat & INTR_BDIS_ACON)
		pr_debug("OTG:  BDIS_ACON, %s\n", state_name(isp));

	/* start certain state transitions right away */
	isp_stat = isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE);
	if (isp_stat & INTR_ID_GND) {
962
		if (otg->default_a) {
L
Linus Torvalds 已提交
963 964 965 966 967 968 969 970 971 972 973 974 975 976
			switch (state) {
			case OTG_STATE_B_IDLE:
				a_idle(isp, "idle");
				/* FALLTHROUGH */
			case OTG_STATE_A_IDLE:
				enable_vbus_source(isp);
				/* FALLTHROUGH */
			case OTG_STATE_A_WAIT_VRISE:
				/* we skip over OTG_STATE_A_WAIT_BCON, since
				 * the HC will transition to A_HOST (or
				 * A_SUSPEND!) without our noticing except
				 * when HNP is used.
				 */
				if (isp_stat & INTR_VBUS_VLD)
977
					isp->phy.state = OTG_STATE_A_HOST;
L
Linus Torvalds 已提交
978 979 980 981 982 983 984
				break;
			case OTG_STATE_A_WAIT_VFALL:
				if (!(isp_stat & INTR_SESS_VLD))
					a_idle(isp, "vfell");
				break;
			default:
				if (!(isp_stat & INTR_VBUS_VLD))
985
					isp->phy.state = OTG_STATE_A_VBUS_ERR;
L
Linus Torvalds 已提交
986 987 988 989 990 991 992 993
				break;
			}
			isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);
		} else {
			switch (state) {
			case OTG_STATE_B_PERIPHERAL:
			case OTG_STATE_B_HOST:
			case OTG_STATE_B_WAIT_ACON:
994
				usb_gadget_vbus_disconnect(otg->gadget);
L
Linus Torvalds 已提交
995 996 997 998 999 1000
				break;
			default:
				break;
			}
			if (state != OTG_STATE_A_IDLE)
				a_idle(isp, "id");
1001
			if (otg->host && state == OTG_STATE_A_IDLE)
L
Linus Torvalds 已提交
1002 1003 1004 1005
				isp1301_defer_work(isp, WORK_HOST_RESUME);
			isp_bstat = 0;
		}
	} else {
1006 1007
		u32 l;

L
Linus Torvalds 已提交
1008 1009 1010
		/* if user unplugged mini-A end of cable,
		 * don't bypass A_WAIT_VFALL.
		 */
1011
		if (otg->default_a) {
L
Linus Torvalds 已提交
1012 1013
			switch (state) {
			default:
1014
				isp->phy.state = OTG_STATE_A_WAIT_VFALL;
L
Linus Torvalds 已提交
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026
				break;
			case OTG_STATE_A_WAIT_VFALL:
				state = OTG_STATE_A_IDLE;
				/* khubd may take a while to notice and
				 * handle this disconnect, so don't go
				 * to B_IDLE quite yet.
				 */
				break;
			case OTG_STATE_A_IDLE:
				host_suspend(isp);
				isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1,
						MC1_BDIS_ACON_EN);
1027
				isp->phy.state = OTG_STATE_B_IDLE;
1028 1029 1030
				l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
				l &= ~OTG_CTRL_BITS;
				omap_writel(l, OTG_CTRL);
L
Linus Torvalds 已提交
1031 1032 1033 1034 1035 1036 1037
				break;
			case OTG_STATE_B_IDLE:
				break;
			}
		}
		isp_bstat = isp1301_get_u8(isp, ISP1301_OTG_STATUS);

1038
		switch (isp->phy.state) {
L
Linus Torvalds 已提交
1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050
		case OTG_STATE_B_PERIPHERAL:
		case OTG_STATE_B_WAIT_ACON:
		case OTG_STATE_B_HOST:
			if (likely(isp_bstat & OTG_B_SESS_VLD))
				break;
			enable_vbus_draw(isp, 0);
#ifndef	CONFIG_USB_OTG
			/* UDC driver will clear OTG_BSESSVLD */
			isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
						OTG1_DP_PULLDOWN);
			isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
						OTG1_DP_PULLUP);
1051
			dump_regs(isp, __func__);
L
Linus Torvalds 已提交
1052 1053 1054
#endif
			/* FALLTHROUGH */
		case OTG_STATE_B_SRP_INIT:
1055
			b_idle(isp, __func__);
1056 1057
			l = omap_readl(OTG_CTRL) & OTG_XCEIV_OUTPUTS;
			omap_writel(l, OTG_CTRL);
L
Linus Torvalds 已提交
1058 1059
			/* FALLTHROUGH */
		case OTG_STATE_B_IDLE:
1060
			if (otg->gadget && (isp_bstat & OTG_B_SESS_VLD)) {
L
Linus Torvalds 已提交
1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077
#ifdef	CONFIG_USB_OTG
				update_otg1(isp, isp_stat);
				update_otg2(isp, isp_bstat);
#endif
				b_peripheral(isp);
			} else if (!(isp_stat & (INTR_VBUS_VLD|INTR_SESS_VLD)))
				isp_bstat |= OTG_B_SESS_END;
			break;
		case OTG_STATE_A_WAIT_VFALL:
			break;
		default:
			pr_debug("otg: unsupported b-device %s\n",
				state_name(isp));
			break;
		}
	}

1078
	if (state != isp->phy.state)
L
Linus Torvalds 已提交
1079
		pr_debug("  isp, %s -> %s\n",
1080
				otg_state_string(state), state_name(isp));
L
Linus Torvalds 已提交
1081 1082 1083 1084 1085 1086 1087

#ifdef	CONFIG_USB_OTG
	/* update the OTG controller state to match the isp1301; may
	 * trigger OPRT_CHG irqs for changes going to the isp1301.
	 */
	update_otg1(isp, isp_stat);
	update_otg2(isp, isp_bstat);
1088
	check_state(isp, __func__);
L
Linus Torvalds 已提交
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
#endif

	dump_regs(isp, "isp1301->otg");
}

/*-------------------------------------------------------------------------*/

static u8 isp1301_clear_latch(struct isp1301 *isp)
{
	u8 latch = isp1301_get_u8(isp, ISP1301_INTERRUPT_LATCH);
	isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, latch);
	return latch;
}

static void
1104
isp1301_work(struct work_struct *work)
L
Linus Torvalds 已提交
1105
{
1106
	struct isp1301	*isp = container_of(work, struct isp1301, work);
L
Linus Torvalds 已提交
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
	int		stop;

	/* implicit lock:  we're the only task using this device */
	isp->working = 1;
	do {
		stop = test_bit(WORK_STOP, &isp->todo);

#ifdef	CONFIG_USB_OTG
		/* transfer state from otg engine to isp1301 */
		if (test_and_clear_bit(WORK_UPDATE_ISP, &isp->todo)) {
			otg_update_isp(isp);
1118
			put_device(&isp->client->dev);
L
Linus Torvalds 已提交
1119 1120 1121 1122 1123 1124 1125
		}
#endif
		/* transfer state from isp1301 to otg engine */
		if (test_and_clear_bit(WORK_UPDATE_OTG, &isp->todo)) {
			u8		stat = isp1301_clear_latch(isp);

			isp_update_otg(isp, stat);
1126
			put_device(&isp->client->dev);
L
Linus Torvalds 已提交
1127 1128 1129 1130 1131 1132 1133 1134 1135
		}

		if (test_and_clear_bit(WORK_HOST_RESUME, &isp->todo)) {
			u32	otg_ctrl;

			/*
			 * skip A_WAIT_VRISE; hc transitions invisibly
			 * skip A_WAIT_BCON; same.
			 */
1136
			switch (isp->phy.state) {
L
Linus Torvalds 已提交
1137 1138
			case OTG_STATE_A_WAIT_BCON:
			case OTG_STATE_A_WAIT_VRISE:
1139
				isp->phy.state = OTG_STATE_A_HOST;
L
Linus Torvalds 已提交
1140
				pr_debug("  --> a_host\n");
1141
				otg_ctrl = omap_readl(OTG_CTRL);
L
Linus Torvalds 已提交
1142 1143 1144
				otg_ctrl |= OTG_A_BUSREQ;
				otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
						& OTG_CTRL_MASK;
1145
				omap_writel(otg_ctrl, OTG_CTRL);
L
Linus Torvalds 已提交
1146 1147
				break;
			case OTG_STATE_B_WAIT_ACON:
1148
				isp->phy.state = OTG_STATE_B_HOST;
L
Linus Torvalds 已提交
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
				pr_debug("  --> b_host (acon)\n");
				break;
			case OTG_STATE_B_HOST:
			case OTG_STATE_B_IDLE:
			case OTG_STATE_A_IDLE:
				break;
			default:
				pr_debug("  host resume in %s\n",
						state_name(isp));
			}
			host_resume(isp);
			// mdelay(10);
1161
			put_device(&isp->client->dev);
L
Linus Torvalds 已提交
1162 1163 1164 1165 1166 1167 1168 1169
		}

		if (test_and_clear_bit(WORK_TIMER, &isp->todo)) {
#ifdef	VERBOSE
			dump_regs(isp, "timer");
			if (!stop)
				mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
#endif
1170
			put_device(&isp->client->dev);
L
Linus Torvalds 已提交
1171 1172 1173
		}

		if (isp->todo)
1174
			dev_vdbg(&isp->client->dev,
L
Linus Torvalds 已提交
1175 1176 1177
				"work done, todo = 0x%lx\n",
				isp->todo);
		if (stop) {
1178
			dev_dbg(&isp->client->dev, "stop\n");
L
Linus Torvalds 已提交
1179 1180 1181 1182 1183 1184
			break;
		}
	} while (isp->todo);
	isp->working = 0;
}

1185
static irqreturn_t isp1301_irq(int irq, void *isp)
L
Linus Torvalds 已提交
1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201
{
	isp1301_defer_work(isp, WORK_UPDATE_OTG);
	return IRQ_HANDLED;
}

static void isp1301_timer(unsigned long _isp)
{
	isp1301_defer_work((void *)_isp, WORK_TIMER);
}

/*-------------------------------------------------------------------------*/

static void isp1301_release(struct device *dev)
{
	struct isp1301	*isp;

1202
	isp = dev_get_drvdata(dev);
L
Linus Torvalds 已提交
1203

D
David Brownell 已提交
1204 1205
	/* FIXME -- not with a "new style" driver, it doesn't!! */

L
Linus Torvalds 已提交
1206 1207 1208
	/* ugly -- i2c hijacks our memory hook to wait_for_completion() */
	if (isp->i2c_release)
		isp->i2c_release(dev);
1209
	kfree(isp->phy.otg);
L
Linus Torvalds 已提交
1210 1211 1212 1213 1214
	kfree (isp);
}

static struct isp1301 *the_transceiver;

1215
static int __exit isp1301_remove(struct i2c_client *i2c)
L
Linus Torvalds 已提交
1216 1217 1218
{
	struct isp1301	*isp;

1219
	isp = i2c_get_clientdata(i2c);
L
Linus Torvalds 已提交
1220 1221 1222

	isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
	isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);
1223
	free_irq(i2c->irq, isp);
L
Linus Torvalds 已提交
1224 1225 1226 1227
#ifdef	CONFIG_USB_OTG
	otg_unbind(isp);
#endif
	if (machine_is_omap_h2())
D
David Brownell 已提交
1228
		gpio_free(2);
L
Linus Torvalds 已提交
1229 1230 1231 1232

	isp->timer.data = 0;
	set_bit(WORK_STOP, &isp->todo);
	del_timer_sync(&isp->timer);
T
Tejun Heo 已提交
1233
	flush_work_sync(&isp->work);
L
Linus Torvalds 已提交
1234 1235

	put_device(&i2c->dev);
D
David Brownell 已提交
1236
	the_transceiver = NULL;
L
Linus Torvalds 已提交
1237

1238
	return 0;
L
Linus Torvalds 已提交
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250
}

/*-------------------------------------------------------------------------*/

/* NOTE:  three modes are possible here, only one of which
 * will be standards-conformant on any given system:
 *
 *  - OTG mode (dual-role), required if there's a Mini-AB connector
 *  - HOST mode, for when there's one or more A (host) connectors
 *  - DEVICE mode, for when there's a B/Mini-B (device) connector
 *
 * As a rule, you won't have an isp1301 chip unless it's there to
1251
 * support the OTG mode.  Other modes help testing USB controllers
L
Linus Torvalds 已提交
1252 1253 1254 1255 1256 1257 1258 1259 1260
 * in isolation from (full) OTG support, or maybe so later board
 * revisions can help to support those feature.
 */

#ifdef	CONFIG_USB_OTG

static int isp1301_otg_enable(struct isp1301 *isp)
{
	power_up(isp);
1261
	isp1301_otg_init(isp);
L
Linus Torvalds 已提交
1262 1263 1264 1265 1266

	/* NOTE:  since we don't change this, this provides
	 * a few more interrupts than are strictly needed.
	 */
	isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1267
		INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
L
Linus Torvalds 已提交
1268
	isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1269
		INTR_VBUS_VLD | INTR_SESS_VLD | INTR_ID_GND);
L
Linus Torvalds 已提交
1270

1271
	dev_info(&isp->client->dev, "ready for dual-role USB ...\n");
L
Linus Torvalds 已提交
1272 1273 1274 1275 1276 1277 1278 1279

	return 0;
}

#endif

/* add or disable the host device+driver */
static int
1280
isp1301_set_host(struct usb_otg *otg, struct usb_bus *host)
L
Linus Torvalds 已提交
1281
{
1282
	struct isp1301	*isp = container_of(otg->phy, struct isp1301, phy);
L
Linus Torvalds 已提交
1283 1284 1285 1286 1287

	if (!otg || isp != the_transceiver)
		return -ENODEV;

	if (!host) {
1288
		omap_writew(0, OTG_IRQ_EN);
L
Linus Torvalds 已提交
1289
		power_down(isp);
1290
		otg->host = NULL;
L
Linus Torvalds 已提交
1291 1292 1293 1294
		return 0;
	}

#ifdef	CONFIG_USB_OTG
1295
	otg->host = host;
1296
	dev_dbg(&isp->client->dev, "registered host\n");
L
Linus Torvalds 已提交
1297
	host_suspend(isp);
1298
	if (otg->gadget)
L
Linus Torvalds 已提交
1299 1300 1301 1302 1303
		return isp1301_otg_enable(isp);
	return 0;

#elif	!defined(CONFIG_USB_GADGET_OMAP)
	// FIXME update its refcount
1304
	otg->host = host;
L
Linus Torvalds 已提交
1305 1306 1307 1308 1309 1310

	power_up(isp);

	if (machine_is_omap_h2())
		isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);

1311
	dev_info(&isp->client->dev, "A-Host sessions ok\n");
L
Linus Torvalds 已提交
1312
	isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1313
		INTR_ID_GND);
L
Linus Torvalds 已提交
1314
	isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1315
		INTR_ID_GND);
L
Linus Torvalds 已提交
1316 1317 1318 1319 1320 1321 1322 1323

	/* If this has a Mini-AB connector, this mode is highly
	 * nonstandard ... but can be handy for testing, especially with
	 * the Mini-A end of an OTG cable.  (Or something nonstandard
	 * like MiniB-to-StandardB, maybe built with a gender mender.)
	 */
	isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1, OTG1_VBUS_DRV);

1324
	dump_regs(isp, __func__);
L
Linus Torvalds 已提交
1325 1326 1327 1328

	return 0;

#else
1329
	dev_dbg(&isp->client->dev, "host sessions not allowed\n");
L
Linus Torvalds 已提交
1330 1331 1332 1333 1334 1335
	return -EINVAL;
#endif

}

static int
1336
isp1301_set_peripheral(struct usb_otg *otg, struct usb_gadget *gadget)
L
Linus Torvalds 已提交
1337
{
1338
	struct isp1301	*isp = container_of(otg->phy, struct isp1301, phy);
L
Linus Torvalds 已提交
1339 1340 1341 1342 1343

	if (!otg || isp != the_transceiver)
		return -ENODEV;

	if (!gadget) {
1344
		omap_writew(0, OTG_IRQ_EN);
1345
		if (!otg->default_a)
L
Linus Torvalds 已提交
1346
			enable_vbus_draw(isp, 0);
1347 1348
		usb_gadget_vbus_disconnect(otg->gadget);
		otg->gadget = NULL;
L
Linus Torvalds 已提交
1349 1350 1351 1352 1353
		power_down(isp);
		return 0;
	}

#ifdef	CONFIG_USB_OTG
1354
	otg->gadget = gadget;
1355
	dev_dbg(&isp->client->dev, "registered gadget\n");
L
Linus Torvalds 已提交
1356
	/* gadget driver may be suspended until vbus_connect () */
1357
	if (otg->host)
L
Linus Torvalds 已提交
1358 1359 1360 1361
		return isp1301_otg_enable(isp);
	return 0;

#elif	!defined(CONFIG_USB_OHCI_HCD) && !defined(CONFIG_USB_OHCI_HCD_MODULE)
1362
	otg->gadget = gadget;
L
Linus Torvalds 已提交
1363 1364
	// FIXME update its refcount

1365 1366 1367 1368 1369 1370 1371 1372
	{
		u32 l;

		l = omap_readl(OTG_CTRL) & OTG_CTRL_MASK;
		l &= ~(OTG_XCEIV_OUTPUTS|OTG_CTRL_BITS);
		l |= OTG_ID;
		omap_writel(l, OTG_CTRL);
	}
1373

L
Linus Torvalds 已提交
1374
	power_up(isp);
1375
	isp->phy.state = OTG_STATE_B_IDLE;
L
Linus Torvalds 已提交
1376

D
David Brownell 已提交
1377
	if (machine_is_omap_h2() || machine_is_omap_h3())
L
Linus Torvalds 已提交
1378 1379 1380
		isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1, MC1_DAT_SE0);

	isp1301_set_bits(isp, ISP1301_INTERRUPT_RISING,
1381
		INTR_SESS_VLD);
L
Linus Torvalds 已提交
1382
	isp1301_set_bits(isp, ISP1301_INTERRUPT_FALLING,
1383
		INTR_VBUS_VLD);
1384
	dev_info(&isp->client->dev, "B-Peripheral sessions ok\n");
1385
	dump_regs(isp, __func__);
L
Linus Torvalds 已提交
1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396

	/* If this has a Mini-AB connector, this mode is highly
	 * nonstandard ... but can be handy for testing, so long
	 * as you don't plug a Mini-A cable into the jack.
	 */
	if (isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE) & INTR_VBUS_VLD)
		b_peripheral(isp);

	return 0;

#else
1397
	dev_dbg(&isp->client->dev, "peripheral sessions not allowed\n");
L
Linus Torvalds 已提交
1398 1399 1400 1401 1402 1403 1404 1405
	return -EINVAL;
#endif
}


/*-------------------------------------------------------------------------*/

static int
1406
isp1301_set_power(struct usb_phy *dev, unsigned mA)
L
Linus Torvalds 已提交
1407 1408 1409 1410 1411 1412 1413 1414 1415
{
	if (!the_transceiver)
		return -ENODEV;
	if (dev->state == OTG_STATE_B_PERIPHERAL)
		enable_vbus_draw(the_transceiver, mA);
	return 0;
}

static int
1416
isp1301_start_srp(struct usb_otg *otg)
L
Linus Torvalds 已提交
1417
{
1418
	struct isp1301	*isp = container_of(otg->phy, struct isp1301, phy);
L
Linus Torvalds 已提交
1419 1420
	u32		otg_ctrl;

1421 1422
	if (!otg || isp != the_transceiver
			|| isp->phy.state != OTG_STATE_B_IDLE)
L
Linus Torvalds 已提交
1423 1424
		return -ENODEV;

1425
	otg_ctrl = omap_readl(OTG_CTRL);
L
Linus Torvalds 已提交
1426 1427 1428 1429 1430
	if (!(otg_ctrl & OTG_BSESSEND))
		return -EINVAL;

	otg_ctrl |= OTG_B_BUSREQ;
	otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK;
1431
	omap_writel(otg_ctrl, OTG_CTRL);
1432
	isp->phy.state = OTG_STATE_B_SRP_INIT;
L
Linus Torvalds 已提交
1433

1434 1435
	pr_debug("otg: SRP, %s ... %06x\n", state_name(isp),
			omap_readl(OTG_CTRL));
L
Linus Torvalds 已提交
1436
#ifdef	CONFIG_USB_OTG
1437
	check_state(isp, __func__);
L
Linus Torvalds 已提交
1438 1439 1440 1441 1442
#endif
	return 0;
}

static int
1443
isp1301_start_hnp(struct usb_otg *otg)
L
Linus Torvalds 已提交
1444 1445
{
#ifdef	CONFIG_USB_OTG
1446
	struct isp1301	*isp = container_of(otg->phy, struct isp1301, phy);
1447
	u32 l;
L
Linus Torvalds 已提交
1448

1449
	if (!otg || isp != the_transceiver)
L
Linus Torvalds 已提交
1450
		return -ENODEV;
1451
	if (otg->default_a && (otg->host == NULL || !otg->host->b_hnp_enable))
L
Linus Torvalds 已提交
1452
		return -ENOTCONN;
1453 1454
	if (!otg->default_a && (otg->gadget == NULL
			|| !otg->gadget->b_hnp_enable))
L
Linus Torvalds 已提交
1455 1456 1457 1458 1459
		return -ENOTCONN;

	/* We want hardware to manage most HNP protocol timings.
	 * So do this part as early as possible...
	 */
1460
	switch (isp->phy.state) {
L
Linus Torvalds 已提交
1461
	case OTG_STATE_B_HOST:
1462
		isp->phy.state = OTG_STATE_B_PERIPHERAL;
L
Linus Torvalds 已提交
1463 1464 1465 1466 1467 1468 1469 1470 1471
		/* caller will suspend next */
		break;
	case OTG_STATE_A_HOST:
#if 0
		/* autoconnect mode avoids irq latency bugs */
		isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
				MC1_BDIS_ACON_EN);
#endif
		/* caller must suspend then clear A_BUSREQ */
1472
		usb_gadget_vbus_connect(otg->gadget);
1473 1474 1475
		l = omap_readl(OTG_CTRL);
		l |= OTG_A_SETB_HNPEN;
		omap_writel(l, OTG_CTRL);
L
Linus Torvalds 已提交
1476 1477 1478 1479 1480 1481 1482 1483 1484

		break;
	case OTG_STATE_A_PERIPHERAL:
		/* initiated by B-Host suspend */
		break;
	default:
		return -EILSEQ;
	}
	pr_debug("otg: HNP %s, %06x ...\n",
1485
		state_name(isp), omap_readl(OTG_CTRL));
1486
	check_state(isp, __func__);
L
Linus Torvalds 已提交
1487 1488 1489 1490 1491 1492 1493 1494 1495
	return 0;
#else
	/* srp-only */
	return -EINVAL;
#endif
}

/*-------------------------------------------------------------------------*/

1496
static int __devinit
D
David Brownell 已提交
1497
isp1301_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
L
Linus Torvalds 已提交
1498 1499 1500 1501 1502 1503 1504
{
	int			status;
	struct isp1301		*isp;

	if (the_transceiver)
		return 0;

1505
	isp = kzalloc(sizeof *isp, GFP_KERNEL);
L
Linus Torvalds 已提交
1506 1507 1508
	if (!isp)
		return 0;

1509 1510 1511 1512 1513 1514
	isp->phy.otg = kzalloc(sizeof *isp->phy.otg, GFP_KERNEL);
	if (!isp->phy.otg) {
		kfree(isp);
		return 0;
	}

1515
	INIT_WORK(&isp->work, isp1301_work);
L
Linus Torvalds 已提交
1516 1517 1518 1519
	init_timer(&isp->timer);
	isp->timer.function = isp1301_timer;
	isp->timer.data = (unsigned long) isp;

1520 1521
	i2c_set_clientdata(i2c, isp);
	isp->client = i2c;
L
Linus Torvalds 已提交
1522

L
Lucas De Marchi 已提交
1523
	/* verify the chip (shouldn't be necessary) */
1524 1525 1526 1527 1528 1529 1530 1531 1532
	status = isp1301_get_u16(isp, ISP1301_VENDOR_ID);
	if (status != I2C_VENDOR_ID_PHILIPS) {
		dev_dbg(&i2c->dev, "not philips id: %d\n", status);
		goto fail;
	}
	status = isp1301_get_u16(isp, ISP1301_PRODUCT_ID);
	if (status != I2C_PRODUCT_ID_PHILIPS_1301) {
		dev_dbg(&i2c->dev, "not isp1301, %d\n", status);
		goto fail;
L
Linus Torvalds 已提交
1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560
	}
	isp->i2c_release = i2c->dev.release;
	i2c->dev.release = isp1301_release;

	/* initial development used chiprev 2.00 */
	status = i2c_smbus_read_word_data(i2c, ISP1301_BCD_DEVICE);
	dev_info(&i2c->dev, "chiprev %x.%02x, driver " DRIVER_VERSION "\n",
		status >> 8, status & 0xff);

	/* make like power-on reset */
	isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_1, MC1_MASK);

	isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2, MC2_BI_DI);
	isp1301_clear_bits(isp, ISP1301_MODE_CONTROL_2, ~MC2_BI_DI);

	isp1301_set_bits(isp, ISP1301_OTG_CONTROL_1,
				OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
	isp1301_clear_bits(isp, ISP1301_OTG_CONTROL_1,
				~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN));

	isp1301_clear_bits(isp, ISP1301_INTERRUPT_LATCH, ~0);
	isp1301_clear_bits(isp, ISP1301_INTERRUPT_FALLING, ~0);
	isp1301_clear_bits(isp, ISP1301_INTERRUPT_RISING, ~0);

#ifdef	CONFIG_USB_OTG
	status = otg_bind(isp);
	if (status < 0) {
		dev_dbg(&i2c->dev, "can't bind OTG\n");
1561
		goto fail;
L
Linus Torvalds 已提交
1562 1563 1564 1565 1566 1567
	}
#endif

	if (machine_is_omap_h2()) {
		/* full speed signaling by default */
		isp1301_set_bits(isp, ISP1301_MODE_CONTROL_1,
D
Dmitry Baryshkov 已提交
1568
			MC1_SPEED);
L
Linus Torvalds 已提交
1569 1570 1571 1572 1573
		isp1301_set_bits(isp, ISP1301_MODE_CONTROL_2,
			MC2_SPD_SUSP_CTRL);

		/* IRQ wired at M14 */
		omap_cfg_reg(M14_1510_GPIO2);
1574 1575 1576
		if (gpio_request(2, "isp1301") == 0)
			gpio_direction_input(2);
		isp->irq_type = IRQF_TRIGGER_FALLING;
L
Linus Torvalds 已提交
1577 1578
	}

1579
	isp->irq_type |= IRQF_SAMPLE_RANDOM;
1580
	status = request_irq(i2c->irq, isp1301_irq,
1581
			isp->irq_type, DRIVER_NAME, isp);
L
Linus Torvalds 已提交
1582 1583
	if (status < 0) {
		dev_dbg(&i2c->dev, "can't get IRQ %d, err %d\n",
1584 1585
				i2c->irq, status);
		goto fail;
L
Linus Torvalds 已提交
1586 1587
	}

1588 1589 1590
	isp->phy.dev = &i2c->dev;
	isp->phy.label = DRIVER_NAME;
	isp->phy.set_power = isp1301_set_power,
L
Linus Torvalds 已提交
1591

1592 1593 1594 1595 1596
	isp->phy.otg->phy = &isp->phy;
	isp->phy.otg->set_host = isp1301_set_host,
	isp->phy.otg->set_peripheral = isp1301_set_peripheral,
	isp->phy.otg->start_srp = isp1301_start_srp,
	isp->phy.otg->start_hnp = isp1301_start_hnp,
L
Linus Torvalds 已提交
1597 1598 1599 1600 1601 1602 1603 1604 1605 1606

	enable_vbus_draw(isp, 0);
	power_down(isp);
	the_transceiver = isp;

#ifdef	CONFIG_USB_OTG
	update_otg1(isp, isp1301_get_u8(isp, ISP1301_INTERRUPT_SOURCE));
	update_otg2(isp, isp1301_get_u8(isp, ISP1301_OTG_STATUS));
#endif

1607
	dump_regs(isp, __func__);
L
Linus Torvalds 已提交
1608 1609 1610 1611 1612 1613

#ifdef	VERBOSE
	mod_timer(&isp->timer, jiffies + TIMER_JIFFIES);
	dev_dbg(&i2c->dev, "scheduled timer, %d min\n", TIMER_MINUTES);
#endif

1614
	status = usb_add_phy(&isp->phy, USB_PHY_TYPE_USB2);
L
Linus Torvalds 已提交
1615 1616 1617 1618 1619 1620
	if (status < 0)
		dev_err(&i2c->dev, "can't register transceiver, %d\n",
			status);

	return 0;

1621
fail:
1622
	kfree(isp->phy.otg);
1623 1624
	kfree(isp);
	return -ENODEV;
L
Linus Torvalds 已提交
1625 1626
}

1627 1628 1629 1630 1631 1632
static const struct i2c_device_id isp1301_id[] = {
	{ "isp1301_omap", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, isp1301_id);

L
Linus Torvalds 已提交
1633
static struct i2c_driver isp1301_driver = {
1634 1635 1636
	.driver = {
		.name	= "isp1301_omap",
	},
1637 1638 1639
	.probe		= isp1301_probe,
	.remove		= __exit_p(isp1301_remove),
	.id_table	= isp1301_id,
L
Linus Torvalds 已提交
1640 1641 1642 1643 1644 1645 1646 1647
};

/*-------------------------------------------------------------------------*/

static int __init isp_init(void)
{
	return i2c_add_driver(&isp1301_driver);
}
1648
subsys_initcall(isp_init);
L
Linus Torvalds 已提交
1649 1650 1651 1652

static void __exit isp_exit(void)
{
	if (the_transceiver)
1653
		usb_remove_phy(&the_transceiver->phy);
L
Linus Torvalds 已提交
1654 1655 1656 1657
	i2c_del_driver(&isp1301_driver);
}
module_exit(isp_exit);