Merge branch 'master' of git://gitorious.org/linux-can/linux-can-next

drivers/net/can/cc770/cc770.c

@@ -34,7 +34,6 @@
 #include <linux/can.h>
 #include <linux/can/dev.h>
 #include <linux/can/error.h>
-#include <linux/can/dev.h>
 #include <linux/can/platform/cc770.h>
 
 #include "cc770.h"

drivers/net/can/sja1000/Kconfig

@@ -43,12 +43,33 @@ config CAN_EMS_PCI
 	  CPC-PCIe and CPC-104P cards from EMS Dr. Thomas Wuensche
 	  (http://www.ems-wuensche.de).
 
+config CAN_PEAK_PCMCIA
+	tristate "PEAK PCAN-PC Card"
+	depends on PCMCIA
+	---help---
+	  This driver is for the PCAN-PC Card PCMCIA adapter (1 or 2 channels)
+	  from PEAK-System (http://www.peak-system.com). To compile this
+	  driver as a module, choose M here: the module will be called
+	  peak_pcmcia.
+
 config CAN_PEAK_PCI
-	tristate "PEAK PCAN PCI/PCIe Cards"
+	tristate "PEAK PCAN-PCI/PCIe/miniPCI Cards"
 	depends on PCI
 	---help---
-	  This driver is for the PCAN PCI/PCIe cards (1, 2, 3 or 4 channels)
-	  from PEAK Systems (http://www.peak-system.com).
+	  This driver is for the PCAN-PCI/PCIe/miniPCI cards
+	  (1, 2, 3 or 4 channels) from PEAK-System Technik
+	  (http://www.peak-system.com).
+
+config CAN_PEAK_PCIEC
+	bool "PEAK PCAN-ExpressCard Cards"
+	depends on CAN_PEAK_PCI
+	select I2C
+	select I2C_ALGOBIT
+	default y
+	---help---
+	  Say Y here if you want to use a PCAN-ExpressCard from PEAK-System
+	  Technik. This will also automatically select I2C and I2C_ALGO
+	  configuration options.
 
 config CAN_KVASER_PCI
 	tristate "Kvaser PCIcanx and Kvaser PCIcan PCI Cards"

drivers/net/can/sja1000/Makefile

@@ -9,6 +9,7 @@ obj-$(CONFIG_CAN_SJA1000_OF_PLATFORM) += sja1000_of_platform.o
 obj-$(CONFIG_CAN_EMS_PCMCIA) += ems_pcmcia.o
 obj-$(CONFIG_CAN_EMS_PCI) += ems_pci.o
 obj-$(CONFIG_CAN_KVASER_PCI) += kvaser_pci.o
+obj-$(CONFIG_CAN_PEAK_PCMCIA) += peak_pcmcia.o
 obj-$(CONFIG_CAN_PEAK_PCI) += peak_pci.o
 obj-$(CONFIG_CAN_PLX_PCI) += plx_pci.o
 obj-$(CONFIG_CAN_TSCAN1) += tscan1.o

drivers/net/can/sja1000/peak_pci.c

 /*
  * Copyright (C) 2007, 2011 Wolfgang Grandegger <wg@grandegger.com>
+ * Copyright (C) 2012 Stephane Grosjean <s.grosjean@peak-system.com>
  *
  * Derived from the PCAN project file driver/src/pcan_pci.c:
  *
@@ -13,10 +14,6 @@
  * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 
 #include <linux/kernel.h>
@@ -26,22 +23,26 @@
 #include <linux/delay.h>
 #include <linux/pci.h>
 #include <linux/io.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
 #include <linux/can.h>
 #include <linux/can/dev.h>
 
 #include "sja1000.h"
 
 MODULE_AUTHOR("Wolfgang Grandegger <wg@grandegger.com>");
-MODULE_DESCRIPTION("Socket-CAN driver for PEAK PCAN PCI/PCIe cards");
-MODULE_SUPPORTED_DEVICE("PEAK PCAN PCI/PCIe CAN card");
+MODULE_DESCRIPTION("Socket-CAN driver for PEAK PCAN PCI family cards");
+MODULE_SUPPORTED_DEVICE("PEAK PCAN PCI/PCIe/PCIeC miniPCI CAN cards");
 MODULE_LICENSE("GPL v2");
 
 #define DRV_NAME  "peak_pci"
 
+struct peak_pciec_card;
 struct peak_pci_chan {
 	void __iomem *cfg_base;		/* Common for all channels */
 	struct net_device *prev_dev;	/* Chain of network devices */
 	u16 icr_mask;			/* Interrupt mask for fast ack */
+	struct peak_pciec_card *pciec_card;	/* only for PCIeC LEDs */
 };
 
 #define PEAK_PCI_CAN_CLOCK	(16000000 / 2)
@@ -61,16 +62,464 @@ struct peak_pci_chan {
 
 #define PEAK_PCI_VENDOR_ID	0x001C	/* The PCI device and vendor IDs */
 #define PEAK_PCI_DEVICE_ID	0x0001	/* for PCI/PCIe slot cards */
+#define PEAK_PCIEC_DEVICE_ID	0x0002	/* for ExpressCard slot cards */
+#define PEAK_PCIE_DEVICE_ID	0x0003	/* for nextgen PCIe slot cards */
+#define PEAK_MPCI_DEVICE_ID	0x0008	/* The miniPCI slot cards */
+
+#define PEAK_PCI_CHAN_MAX	4
 
-static const u16 peak_pci_icr_masks[] = {0x02, 0x01, 0x40, 0x80};
+static const u16 peak_pci_icr_masks[PEAK_PCI_CHAN_MAX] = {
+	0x02, 0x01, 0x40, 0x80
+};
 
 static DEFINE_PCI_DEVICE_TABLE(peak_pci_tbl) = {
 	{PEAK_PCI_VENDOR_ID, PEAK_PCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+	{PEAK_PCI_VENDOR_ID, PEAK_PCIE_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+	{PEAK_PCI_VENDOR_ID, PEAK_MPCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+#ifdef CONFIG_CAN_PEAK_PCIEC
+	{PEAK_PCI_VENDOR_ID, PEAK_PCIEC_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+#endif
 	{0,}
 };
 
 MODULE_DEVICE_TABLE(pci, peak_pci_tbl);
 
+#ifdef CONFIG_CAN_PEAK_PCIEC
+/*
+ * PCAN-ExpressCard needs I2C bit-banging configuration option.
+ */
+
+/* GPIOICR byte access offsets */
+#define PITA_GPOUT		0x18	/* GPx output value */
+#define PITA_GPIN		0x19	/* GPx input value */
+#define PITA_GPOEN		0x1A	/* configure GPx as ouput pin */
+
+/* I2C GP bits */
+#define PITA_GPIN_SCL		0x01	/* Serial Clock Line */
+#define PITA_GPIN_SDA		0x04	/* Serial DAta line */
+
+#define PCA9553_1_SLAVEADDR	(0xC4 >> 1)
+
+/* PCA9553 LS0 fields values */
+enum {
+	PCA9553_LOW,
+	PCA9553_HIGHZ,
+	PCA9553_PWM0,
+	PCA9553_PWM1
+};
+
+/* LEDs control */
+#define PCA9553_ON		PCA9553_LOW
+#define PCA9553_OFF		PCA9553_HIGHZ
+#define PCA9553_SLOW		PCA9553_PWM0
+#define PCA9553_FAST		PCA9553_PWM1
+
+#define PCA9553_LED(c)		(1 << (c))
+#define PCA9553_LED_STATE(s, c)	((s) << ((c) << 1))
+
+#define PCA9553_LED_ON(c)	PCA9553_LED_STATE(PCA9553_ON, c)
+#define PCA9553_LED_OFF(c)	PCA9553_LED_STATE(PCA9553_OFF, c)
+#define PCA9553_LED_SLOW(c)	PCA9553_LED_STATE(PCA9553_SLOW, c)
+#define PCA9553_LED_FAST(c)	PCA9553_LED_STATE(PCA9553_FAST, c)
+#define PCA9553_LED_MASK(c)	PCA9553_LED_STATE(0x03, c)
+
+#define PCA9553_LED_OFF_ALL	(PCA9553_LED_OFF(0) | PCA9553_LED_OFF(1))
+
+#define PCA9553_LS0_INIT	0x40 /* initial value (!= from 0x00) */
+
+struct peak_pciec_chan {
+	struct net_device *netdev;
+	unsigned long prev_rx_bytes;
+	unsigned long prev_tx_bytes;
+};
+
+struct peak_pciec_card {
+	void __iomem *cfg_base;		/* Common for all channels */
+	void __iomem *reg_base;		/* first channel base address */
+	u8 led_cache;			/* leds state cache */
+
+	/* PCIExpressCard i2c data */
+	struct i2c_algo_bit_data i2c_bit;
+	struct i2c_adapter led_chip;
+	struct delayed_work led_work;	/* led delayed work */
+	int chan_count;
+	struct peak_pciec_chan channel[PEAK_PCI_CHAN_MAX];
+};
+
+/* "normal" pci register write callback is overloaded for leds control */
+static void peak_pci_write_reg(const struct sja1000_priv *priv,
+			       int port, u8 val);
+
+static inline void pita_set_scl_highz(struct peak_pciec_card *card)
+{
+	u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SCL;
+	writeb(gp_outen, card->cfg_base + PITA_GPOEN);
+}
+
+static inline void pita_set_sda_highz(struct peak_pciec_card *card)
+{
+	u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SDA;
+	writeb(gp_outen, card->cfg_base + PITA_GPOEN);
+}
+
+static void peak_pciec_init_pita_gpio(struct peak_pciec_card *card)
+{
+	/* raise SCL & SDA GPIOs to high-Z */
+	pita_set_scl_highz(card);
+	pita_set_sda_highz(card);
+}
+
+static void pita_setsda(void *data, int state)
+{
+	struct peak_pciec_card *card = (struct peak_pciec_card *)data;
+	u8 gp_out, gp_outen;
+
+	/* set output sda always to 0 */
+	gp_out = readb(card->cfg_base + PITA_GPOUT) & ~PITA_GPIN_SDA;
+	writeb(gp_out, card->cfg_base + PITA_GPOUT);
+
+	/* control output sda with GPOEN */
+	gp_outen = readb(card->cfg_base + PITA_GPOEN);
+	if (state)
+		gp_outen &= ~PITA_GPIN_SDA;
+	else
+		gp_outen |= PITA_GPIN_SDA;
+
+	writeb(gp_outen, card->cfg_base + PITA_GPOEN);
+}
+
+static void pita_setscl(void *data, int state)
+{
+	struct peak_pciec_card *card = (struct peak_pciec_card *)data;
+	u8 gp_out, gp_outen;
+
+	/* set output scl always to 0 */
+	gp_out = readb(card->cfg_base + PITA_GPOUT) & ~PITA_GPIN_SCL;
+	writeb(gp_out, card->cfg_base + PITA_GPOUT);
+
+	/* control output scl with GPOEN */
+	gp_outen = readb(card->cfg_base + PITA_GPOEN);
+	if (state)
+		gp_outen &= ~PITA_GPIN_SCL;
+	else
+		gp_outen |= PITA_GPIN_SCL;
+
+	writeb(gp_outen, card->cfg_base + PITA_GPOEN);
+}
+
+static int pita_getsda(void *data)
+{
+	struct peak_pciec_card *card = (struct peak_pciec_card *)data;
+
+	/* set tristate */
+	pita_set_sda_highz(card);
+
+	return (readb(card->cfg_base + PITA_GPIN) & PITA_GPIN_SDA) ? 1 : 0;
+}
+
+static int pita_getscl(void *data)
+{
+	struct peak_pciec_card *card = (struct peak_pciec_card *)data;
+
+	/* set tristate */
+	pita_set_scl_highz(card);
+
+	return (readb(card->cfg_base + PITA_GPIN) & PITA_GPIN_SCL) ? 1 : 0;
+}
+
+/*
+ * write commands to the LED chip though the I2C-bus of the PCAN-PCIeC
+ */
+static int peak_pciec_write_pca9553(struct peak_pciec_card *card,
+				    u8 offset, u8 data)
+{
+	u8 buffer[2] = {
+		offset,
+		data
+	};
+	struct i2c_msg msg = {
+		.addr = PCA9553_1_SLAVEADDR,
+		.len = 2,
+		.buf = buffer,
+	};
+	int ret;
+
+	/* cache led mask */
+	if ((offset == 5) && (data == card->led_cache))
+		return 0;
+
+	ret = i2c_transfer(&card->led_chip, &msg, 1);
+	if (ret < 0)
+		return ret;
+
+	if (offset == 5)
+		card->led_cache = data;
+
+	return 0;
+}
+
+/*
+ * delayed work callback used to control the LEDs
+ */
+static void peak_pciec_led_work(struct work_struct *work)
+{
+	struct peak_pciec_card *card =
+		container_of(work, struct peak_pciec_card, led_work.work);
+	struct net_device *netdev;
+	u8 new_led = card->led_cache;
+	int i, up_count = 0;
+
+	/* first check what is to do */
+	for (i = 0; i < card->chan_count; i++) {
+		/* default is: not configured */
+		new_led &= ~PCA9553_LED_MASK(i);
+		new_led |= PCA9553_LED_ON(i);
+
+		netdev = card->channel[i].netdev;
+		if (!netdev || !(netdev->flags & IFF_UP))
+			continue;
+
+		up_count++;
+
+		/* no activity (but configured) */
+		new_led &= ~PCA9553_LED_MASK(i);
+		new_led |= PCA9553_LED_SLOW(i);
+
+		/* if bytes counters changed, set fast blinking led */
+		if (netdev->stats.rx_bytes != card->channel[i].prev_rx_bytes) {
+			card->channel[i].prev_rx_bytes = netdev->stats.rx_bytes;
+			new_led &= ~PCA9553_LED_MASK(i);
+			new_led |= PCA9553_LED_FAST(i);
+		}
+		if (netdev->stats.tx_bytes != card->channel[i].prev_tx_bytes) {
+			card->channel[i].prev_tx_bytes = netdev->stats.tx_bytes;
+			new_led &= ~PCA9553_LED_MASK(i);
+			new_led |= PCA9553_LED_FAST(i);
+		}
+	}
+
+	/* check if LS0 settings changed, only update i2c if so */
+	peak_pciec_write_pca9553(card, 5, new_led);
+
+	/* restart timer (except if no more configured channels) */
+	if (up_count)
+		schedule_delayed_work(&card->led_work, HZ);
+}
+
+/*
+ * set LEDs blinking state
+ */
+static void peak_pciec_set_leds(struct peak_pciec_card *card, u8 led_mask, u8 s)
+{
+	u8 new_led = card->led_cache;
+	int i;
+
+	/* first check what is to do */
+	for (i = 0; i < card->chan_count; i++)
+		if (led_mask & PCA9553_LED(i)) {
+			new_led &= ~PCA9553_LED_MASK(i);
+			new_led |= PCA9553_LED_STATE(s, i);
+		}
+
+	/* check if LS0 settings changed, only update i2c if so */
+	peak_pciec_write_pca9553(card, 5, new_led);
+}
+
+/*
+ * start one second delayed work to control LEDs
+ */
+static void peak_pciec_start_led_work(struct peak_pciec_card *card)
+{
+	if (!delayed_work_pending(&card->led_work))
+		schedule_delayed_work(&card->led_work, HZ);
+}
+
+/*
+ * stop LEDs delayed work
+ */
+static void peak_pciec_stop_led_work(struct peak_pciec_card *card)
+{
+	cancel_delayed_work_sync(&card->led_work);
+}
+
+/*
+ * initialize the PCA9553 4-bit I2C-bus LED chip
+ */
+static int peak_pciec_init_leds(struct peak_pciec_card *card)
+{
+	int err;
+
+	/* prescaler for frequency 0: "SLOW" = 1 Hz = "44" */
+	err = peak_pciec_write_pca9553(card, 1, 44 / 1);
+	if (err)
+		return err;
+
+	/* duty cycle 0: 50% */
+	err = peak_pciec_write_pca9553(card, 2, 0x80);
+	if (err)
+		return err;
+
+	/* prescaler for frequency 1: "FAST" = 5 Hz */
+	err = peak_pciec_write_pca9553(card, 3, 44 / 5);
+	if (err)
+		return err;
+
+	/* duty cycle 1: 50% */
+	err = peak_pciec_write_pca9553(card, 4, 0x80);
+	if (err)
+		return err;
+
+	/* switch LEDs to initial state */
+	return peak_pciec_write_pca9553(card, 5, PCA9553_LS0_INIT);
+}
+
+/*
+ * restore LEDs state to off peak_pciec_leds_exit
+ */
+static void peak_pciec_leds_exit(struct peak_pciec_card *card)
+{
+	/* switch LEDs to off */
+	peak_pciec_write_pca9553(card, 5, PCA9553_LED_OFF_ALL);
+}
+
+/*
+ * normal write sja1000 register method overloaded to catch when controller
+ * is started or stopped, to control leds
+ */
+static void peak_pciec_write_reg(const struct sja1000_priv *priv,
+				 int port, u8 val)
+{
+	struct peak_pci_chan *chan = priv->priv;
+	struct peak_pciec_card *card = chan->pciec_card;
+	int c = (priv->reg_base - card->reg_base) / PEAK_PCI_CHAN_SIZE;
+
+	/* sja1000 register changes control the leds state */
+	if (port == REG_MOD)
+		switch (val) {
+		case MOD_RM:
+			/* Reset Mode: set led on */
+			peak_pciec_set_leds(card, PCA9553_LED(c), PCA9553_ON);
+			break;
+		case 0x00:
+			/* Normal Mode: led slow blinking and start led timer */
+			peak_pciec_set_leds(card, PCA9553_LED(c), PCA9553_SLOW);
+			peak_pciec_start_led_work(card);
+			break;
+		default:
+			break;
+		}
+
+	/* call base function */
+	peak_pci_write_reg(priv, port, val);
+}
+
+static struct i2c_algo_bit_data peak_pciec_i2c_bit_ops = {
+	.setsda	= pita_setsda,
+	.setscl	= pita_setscl,
+	.getsda	= pita_getsda,
+	.getscl	= pita_getscl,
+	.udelay	= 10,
+	.timeout = HZ,
+};
+
+static int peak_pciec_probe(struct pci_dev *pdev, struct net_device *dev)
+{
+	struct sja1000_priv *priv = netdev_priv(dev);
+	struct peak_pci_chan *chan = priv->priv;
+	struct peak_pciec_card *card;
+	int err;
+
+	/* copy i2c object address from 1st channel */
+	if (chan->prev_dev) {
+		struct sja1000_priv *prev_priv = netdev_priv(chan->prev_dev);
+		struct peak_pci_chan *prev_chan = prev_priv->priv;
+
+		card = prev_chan->pciec_card;
+		if (!card)
+			return -ENODEV;
+
+	/* channel is the first one: do the init part */
+	} else {
+		/* create the bit banging I2C adapter structure */
+		card = kzalloc(sizeof(struct peak_pciec_card), GFP_KERNEL);
+		if (!card) {
+			dev_err(&pdev->dev,
+				 "failed allocating memory for i2c chip\n");
+			return -ENOMEM;
+		}
+
+		card->cfg_base = chan->cfg_base;
+		card->reg_base = priv->reg_base;
+
+		card->led_chip.owner = THIS_MODULE;
+		card->led_chip.dev.parent = &pdev->dev;
+		card->led_chip.algo_data = &card->i2c_bit;
+		strncpy(card->led_chip.name, "peak_i2c",
+			sizeof(card->led_chip.name));
+
+		card->i2c_bit = peak_pciec_i2c_bit_ops;
+		card->i2c_bit.udelay = 10;
+		card->i2c_bit.timeout = HZ;
+		card->i2c_bit.data = card;
+
+		peak_pciec_init_pita_gpio(card);
+
+		err = i2c_bit_add_bus(&card->led_chip);
+		if (err) {
+			dev_err(&pdev->dev, "i2c init failed\n");
+			goto pciec_init_err_1;
+		}
+
+		err = peak_pciec_init_leds(card);
+		if (err) {
+			dev_err(&pdev->dev, "leds hardware init failed\n");
+			goto pciec_init_err_2;
+		}
+
+		INIT_DELAYED_WORK(&card->led_work, peak_pciec_led_work);
+		/* PCAN-ExpressCard needs its own callback for leds */
+		priv->write_reg = peak_pciec_write_reg;
+	}
+
+	chan->pciec_card = card;
+	card->channel[card->chan_count++].netdev = dev;
+
+	return 0;
+
+pciec_init_err_2:
+	i2c_del_adapter(&card->led_chip);
+
+pciec_init_err_1:
+	peak_pciec_init_pita_gpio(card);
+	kfree(card);
+
+	return err;
+}
+
+static void peak_pciec_remove(struct peak_pciec_card *card)
+{
+	peak_pciec_stop_led_work(card);
+	peak_pciec_leds_exit(card);
+	i2c_del_adapter(&card->led_chip);
+	peak_pciec_init_pita_gpio(card);
+	kfree(card);
+}
+
+#else /* CONFIG_CAN_PEAK_PCIEC */
+
+/*
+ * Placebo functions when PCAN-ExpressCard support is not selected
+ */
+static inline int peak_pciec_probe(struct pci_dev *pdev, struct net_device *dev)
+{
+	return -ENODEV;
+}
+
+static inline void peak_pciec_remove(struct peak_pciec_card *card)
+{
+}
+#endif /* CONFIG_CAN_PEAK_PCIEC */
+
 static u8 peak_pci_read_reg(const struct sja1000_priv *priv, int port)
 {
 	return readb(priv->reg_base + (port << 2));
@@ -188,17 +637,31 @@ static int __devinit peak_pci_probe(struct pci_dev *pdev,
 
 		SET_NETDEV_DEV(dev, &pdev->dev);
 
+		/* Create chain of SJA1000 devices */
+		chan->prev_dev = pci_get_drvdata(pdev);
+		pci_set_drvdata(pdev, dev);
+
+		/*
+		 * PCAN-ExpressCard needs some additional i2c init.
+		 * This must be done *before* register_sja1000dev() but
+		 * *after* devices linkage
+		 */
+		if (pdev->device == PEAK_PCIEC_DEVICE_ID) {
+			err = peak_pciec_probe(pdev, dev);
+			if (err) {
+				dev_err(&pdev->dev,
+					"failed to probe device (err %d)\n",
+					err);
+				goto failure_free_dev;
+			}
+		}
+
 		err = register_sja1000dev(dev);
 		if (err) {
 			dev_err(&pdev->dev, "failed to register device\n");
-			free_sja1000dev(dev);
-			goto failure_remove_channels;
+			goto failure_free_dev;
 		}
 
-		/* Create chain of SJA1000 devices */
-		chan->prev_dev = pci_get_drvdata(pdev);
-		pci_set_drvdata(pdev, dev);
-
 		dev_info(&pdev->dev,
 			 "%s at reg_base=0x%p cfg_base=0x%p irq=%d\n",
 			 dev->name, priv->reg_base, chan->cfg_base, dev->irq);
@@ -209,10 +672,15 @@ static int __devinit peak_pci_probe(struct pci_dev *pdev,
 
 	return 0;
 
+failure_free_dev:
+	pci_set_drvdata(pdev, chan->prev_dev);
+	free_sja1000dev(dev);
+
 failure_remove_channels:
 	/* Disable interrupts */
 	writew(0x0, cfg_base + PITA_ICR + 2);
 
+	chan = NULL;
 	for (dev = pci_get_drvdata(pdev); dev; dev = chan->prev_dev) {
 		unregister_sja1000dev(dev);
 		free_sja1000dev(dev);
@@ -220,6 +688,10 @@ static int __devinit peak_pci_probe(struct pci_dev *pdev,
 		chan = priv->priv;
 	}
 
+	/* free any PCIeC resources too */
+	if (chan && chan->pciec_card)
+		peak_pciec_remove(chan->pciec_card);
+
 	pci_iounmap(pdev, reg_base);
 
 failure_unmap_cfg_base:
@@ -251,8 +723,13 @@ static void __devexit peak_pci_remove(struct pci_dev *pdev)
 		unregister_sja1000dev(dev);
 		free_sja1000dev(dev);
 		dev = chan->prev_dev;
-		if (!dev)
+
+		if (!dev) {
+			/* do that only for first channel */
+			if (chan->pciec_card)
+				peak_pciec_remove(chan->pciec_card);
 			break;
+		}
 		priv = netdev_priv(dev);
 		chan = priv->priv;
 	}

drivers/net/can/sja1000/peak_pcmcia.c

+/*
+ * Copyright (C) 2010-2012 Stephane Grosjean <s.grosjean@peak-system.com>
+ *
+ * CAN driver for PEAK-System PCAN-PC Card
+ * Derived from the PCAN project file driver/src/pcan_pccard.c
+ * Copyright (C) 2006-2010 PEAK System-Technik GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the version 2 of the GNU General Public License
+ * as published by the Free Software Foundation
+ *
+ * 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.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/io.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include "sja1000.h"
+
+MODULE_AUTHOR("Stephane Grosjean <s.grosjean@peak-system.com>");
+MODULE_DESCRIPTION("CAN driver for PEAK-System PCAN-PC Cards");
+MODULE_LICENSE("GPL v2");
+MODULE_SUPPORTED_DEVICE("PEAK PCAN-PC Card");
+
+/* PEAK-System PCMCIA driver name */
+#define PCC_NAME		"peak_pcmcia"
+
+#define PCC_CHAN_MAX		2
+
+#define PCC_CAN_CLOCK		(16000000 / 2)
+
+#define PCC_MANF_ID		0x0377
+#define PCC_CARD_ID		0x0001
+
+#define PCC_CHAN_SIZE		0x20
+#define PCC_CHAN_OFF(c)		((c) * PCC_CHAN_SIZE)
+#define PCC_COMN_OFF		(PCC_CHAN_OFF(PCC_CHAN_MAX))
+#define PCC_COMN_SIZE		0x40
+
+/* common area registers */
+#define PCC_CCR			0x00
+#define PCC_CSR			0x02
+#define PCC_CPR			0x04
+#define PCC_SPI_DIR		0x06
+#define PCC_SPI_DOR		0x08
+#define PCC_SPI_ADR		0x0a
+#define PCC_SPI_IR		0x0c
+#define PCC_FW_MAJOR		0x10
+#define PCC_FW_MINOR		0x12
+
+/* CCR bits */
+#define PCC_CCR_CLK_16		0x00
+#define PCC_CCR_CLK_10		0x01
+#define PCC_CCR_CLK_21		0x02
+#define PCC_CCR_CLK_8		0x03
+#define PCC_CCR_CLK_MASK	PCC_CCR_CLK_8
+
+#define PCC_CCR_RST_CHAN(c)	(0x01 << ((c) + 2))
+#define PCC_CCR_RST_ALL		(PCC_CCR_RST_CHAN(0) | PCC_CCR_RST_CHAN(1))
+#define PCC_CCR_RST_MASK	PCC_CCR_RST_ALL
+
+/* led selection bits */
+#define PCC_LED(c)		(1 << (c))
+#define PCC_LED_ALL		(PCC_LED(0) | PCC_LED(1))
+
+/* led state value */
+#define PCC_LED_ON		0x00
+#define PCC_LED_FAST		0x01
+#define PCC_LED_SLOW		0x02
+#define PCC_LED_OFF		0x03
+
+#define PCC_CCR_LED_CHAN(s, c)	((s) << (((c) + 2) << 1))
+
+#define PCC_CCR_LED_ON_CHAN(c)		PCC_CCR_LED_CHAN(PCC_LED_ON, c)
+#define PCC_CCR_LED_FAST_CHAN(c)	PCC_CCR_LED_CHAN(PCC_LED_FAST, c)
+#define PCC_CCR_LED_SLOW_CHAN(c)	PCC_CCR_LED_CHAN(PCC_LED_SLOW, c)
+#define PCC_CCR_LED_OFF_CHAN(c)		PCC_CCR_LED_CHAN(PCC_LED_OFF, c)
+#define PCC_CCR_LED_MASK_CHAN(c)	PCC_CCR_LED_OFF_CHAN(c)
+#define PCC_CCR_LED_OFF_ALL		(PCC_CCR_LED_OFF_CHAN(0) | \
+					 PCC_CCR_LED_OFF_CHAN(1))
+#define PCC_CCR_LED_MASK		PCC_CCR_LED_OFF_ALL
+
+#define PCC_CCR_INIT	(PCC_CCR_CLK_16 | PCC_CCR_RST_ALL | PCC_CCR_LED_OFF_ALL)
+
+/* CSR bits */
+#define PCC_CSR_SPI_BUSY		0x04
+
+/* time waiting for SPI busy (prevent from infinite loop) */
+#define PCC_SPI_MAX_BUSY_WAIT_MS	3
+
+/* max count of reading the SPI status register waiting for a change */
+/* (prevent from infinite loop) */
+#define PCC_WRITE_MAX_LOOP		1000
+
+/* max nb of int handled by that isr in one shot (prevent from infinite loop) */
+#define PCC_ISR_MAX_LOOP		10
+
+/* EEPROM chip instruction set */
+/* note: EEPROM Read/Write instructions include A8 bit */
+#define PCC_EEP_WRITE(a)	(0x02 | (((a) & 0x100) >> 5))
+#define PCC_EEP_READ(a)		(0x03 | (((a) & 0x100) >> 5))
+#define PCC_EEP_WRDI		0x04	/* EEPROM Write Disable */
+#define PCC_EEP_RDSR		0x05	/* EEPROM Read Status Register */
+#define PCC_EEP_WREN		0x06	/* EEPROM Write Enable */
+
+/* EEPROM Status Register bits */
+#define PCC_EEP_SR_WEN		0x02	/* EEPROM SR Write Enable bit */
+#define PCC_EEP_SR_WIP		0x01	/* EEPROM SR Write In Progress bit */
+
+/*
+ * The board configuration is probably following:
+ * RX1 is connected to ground.
+ * TX1 is not connected.
+ * CLKO is not connected.
+ * Setting the OCR register to 0xDA is a good idea.
+ * This means normal output mode, push-pull and the correct polarity.
+ */
+#define PCC_OCR			(OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
+
+/*
+ * In the CDR register, you should set CBP to 1.
+ * You will probably also want to set the clock divider value to 7
+ * (meaning direct oscillator output) because the second SJA1000 chip
+ * is driven by the first one CLKOUT output.
+ */
+#define PCC_CDR			(CDR_CBP | CDR_CLKOUT_MASK)
+
+struct pcan_channel {
+	struct net_device *netdev;
+	unsigned long prev_rx_bytes;
+	unsigned long prev_tx_bytes;
+};
+
+/* PCAN-PC Card private structure */
+struct pcan_pccard {
+	struct pcmcia_device *pdev;
+	int chan_count;
+	struct pcan_channel channel[PCC_CHAN_MAX];
+	u8 ccr;
+	u8 fw_major;
+	u8 fw_minor;
+	void __iomem *ioport_addr;
+	struct timer_list led_timer;
+};
+
+static struct pcmcia_device_id pcan_table[] = {
+	PCMCIA_DEVICE_MANF_CARD(PCC_MANF_ID, PCC_CARD_ID),
+	PCMCIA_DEVICE_NULL,
+};
+
+MODULE_DEVICE_TABLE(pcmcia, pcan_table);
+
+static void pcan_set_leds(struct pcan_pccard *card, u8 mask, u8 state);
+
+/*
+ * start timer which controls leds state
+ */
+static void pcan_start_led_timer(struct pcan_pccard *card)
+{
+	if (!timer_pending(&card->led_timer))
+		mod_timer(&card->led_timer, jiffies + HZ);
+}
+
+/*
+ * stop the timer which controls leds state
+ */
+static void pcan_stop_led_timer(struct pcan_pccard *card)
+{
+	del_timer_sync(&card->led_timer);
+}
+
+/*
+ * read a sja1000 register
+ */
+static u8 pcan_read_canreg(const struct sja1000_priv *priv, int port)
+{
+	return ioread8(priv->reg_base + port);
+}
+
+/*
+ * write a sja1000 register
+ */
+static void pcan_write_canreg(const struct sja1000_priv *priv, int port, u8 v)
+{
+	struct pcan_pccard *card = priv->priv;
+	int c = (priv->reg_base - card->ioport_addr) / PCC_CHAN_SIZE;
+
+	/* sja1000 register changes control the leds state */
+	if (port == REG_MOD)
+		switch (v) {
+		case MOD_RM:
+			/* Reset Mode: set led on */
+			pcan_set_leds(card, PCC_LED(c), PCC_LED_ON);
+			break;
+		case 0x00:
+			/* Normal Mode: led slow blinking and start led timer */
+			pcan_set_leds(card, PCC_LED(c), PCC_LED_SLOW);
+			pcan_start_led_timer(card);
+			break;
+		default:
+			break;
+		}
+
+	iowrite8(v, priv->reg_base + port);
+}
+
+/*
+ * read a register from the common area
+ */
+static u8 pcan_read_reg(struct pcan_pccard *card, int port)
+{
+	return ioread8(card->ioport_addr + PCC_COMN_OFF + port);
+}
+
+/*
+ * write a register into the common area
+ */
+static void pcan_write_reg(struct pcan_pccard *card, int port, u8 v)
+{
+	/* cache ccr value */
+	if (port == PCC_CCR) {
+		if (card->ccr == v)
+			return;
+		card->ccr = v;
+	}
+
+	iowrite8(v, card->ioport_addr + PCC_COMN_OFF + port);
+}
+
+/*
+ * check whether the card is present by checking its fw version numbers
+ * against values read at probing time.
+ */
+static inline int pcan_pccard_present(struct pcan_pccard *card)
+{
+	return ((pcan_read_reg(card, PCC_FW_MAJOR) == card->fw_major) &&
+		(pcan_read_reg(card, PCC_FW_MINOR) == card->fw_minor));
+}
+
+/*
+ * wait for SPI engine while it is busy
+ */
+static int pcan_wait_spi_busy(struct pcan_pccard *card)
+{
+	unsigned long timeout = jiffies +
+				msecs_to_jiffies(PCC_SPI_MAX_BUSY_WAIT_MS) + 1;
+
+	/* be sure to read status at least once after sleeping */
+	while (pcan_read_reg(card, PCC_CSR) & PCC_CSR_SPI_BUSY) {
+		if (time_after(jiffies, timeout))
+			return -EBUSY;
+		schedule();
+	}
+
+	return 0;
+}
+
+/*
+ * write data in device eeprom
+ */
+static int pcan_write_eeprom(struct pcan_pccard *card, u16 addr, u8 v)
+{
+	u8 status;
+	int err, i;
+
+	/* write instruction enabling write */
+	pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_WREN);
+	err = pcan_wait_spi_busy(card);
+	if (err)
+		goto we_spi_err;
+
+	/* wait until write enabled */
+	for (i = 0; i < PCC_WRITE_MAX_LOOP; i++) {
+		/* write instruction reading the status register */
+		pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_RDSR);
+		err = pcan_wait_spi_busy(card);
+		if (err)
+			goto we_spi_err;
+
+		/* get status register value and check write enable bit */
+		status = pcan_read_reg(card, PCC_SPI_DIR);
+		if (status & PCC_EEP_SR_WEN)
+			break;
+	}
+
+	if (i >= PCC_WRITE_MAX_LOOP) {
+		dev_err(&card->pdev->dev,
+			"stop waiting to be allowed to write in eeprom\n");
+		return -EIO;
+	}
+
+	/* set address and data */
+	pcan_write_reg(card, PCC_SPI_ADR, addr & 0xff);
+	pcan_write_reg(card, PCC_SPI_DOR, v);
+
+	/*
+	 * write instruction with bit[3] set according to address value:
+	 * if addr refers to upper half of the memory array: bit[3] = 1
+	 */
+	pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_WRITE(addr));
+	err = pcan_wait_spi_busy(card);
+	if (err)
+		goto we_spi_err;
+
+	/* wait while write in progress */
+	for (i = 0; i < PCC_WRITE_MAX_LOOP; i++) {
+		/* write instruction reading the status register */
+		pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_RDSR);
+		err = pcan_wait_spi_busy(card);
+		if (err)
+			goto we_spi_err;
+
+		/* get status register value and check write in progress bit */
+		status = pcan_read_reg(card, PCC_SPI_DIR);
+		if (!(status & PCC_EEP_SR_WIP))
+			break;
+	}
+
+	if (i >= PCC_WRITE_MAX_LOOP) {
+		dev_err(&card->pdev->dev,
+			"stop waiting for write in eeprom to complete\n");
+		return -EIO;
+	}
+
+	/* write instruction disabling write */
+	pcan_write_reg(card, PCC_SPI_IR, PCC_EEP_WRDI);
+	err = pcan_wait_spi_busy(card);
+	if (err)
+		goto we_spi_err;
+
+	return 0;
+
+we_spi_err:
+	dev_err(&card->pdev->dev,
+		"stop waiting (spi engine always busy) err %d\n", err);
+
+	return err;
+}
+
+static void pcan_set_leds(struct pcan_pccard *card, u8 led_mask, u8 state)
+{
+	u8 ccr = card->ccr;
+	int i;
+
+	for (i = 0; i < card->chan_count; i++)
+		if (led_mask & PCC_LED(i)) {
+			/* clear corresponding led bits in ccr */
+			ccr &= ~PCC_CCR_LED_MASK_CHAN(i);
+			/* then set new bits */
+			ccr |= PCC_CCR_LED_CHAN(state, i);
+		}
+
+	/* real write only if something has changed in ccr */
+	pcan_write_reg(card, PCC_CCR, ccr);
+}
+
+/*
+ * enable/disable CAN connectors power
+ */
+static inline void pcan_set_can_power(struct pcan_pccard *card, int onoff)
+{
+	int err;
+
+	err = pcan_write_eeprom(card, 0, !!onoff);
+	if (err)
+		dev_err(&card->pdev->dev,
+			"failed setting power %s to can connectors (err %d)\n",
+			(onoff) ? "on" : "off", err);
+}
+
+/*
+ * set leds state according to channel activity
+ */
+static void pcan_led_timer(unsigned long arg)
+{
+	struct pcan_pccard *card = (struct pcan_pccard *)arg;
+	struct net_device *netdev;
+	int i, up_count = 0;
+	u8 ccr;
+
+	ccr = card->ccr;
+	for (i = 0; i < card->chan_count; i++) {
+		/* default is: not configured */
+		ccr &= ~PCC_CCR_LED_MASK_CHAN(i);
+		ccr |= PCC_CCR_LED_ON_CHAN(i);
+
+		netdev = card->channel[i].netdev;
+		if (!netdev || !(netdev->flags & IFF_UP))
+			continue;
+
+		up_count++;
+
+		/* no activity (but configured) */
+		ccr &= ~PCC_CCR_LED_MASK_CHAN(i);
+		ccr |= PCC_CCR_LED_SLOW_CHAN(i);
+
+		/* if bytes counters changed, set fast blinking led */
+		if (netdev->stats.rx_bytes != card->channel[i].prev_rx_bytes) {
+			card->channel[i].prev_rx_bytes = netdev->stats.rx_bytes;
+			ccr &= ~PCC_CCR_LED_MASK_CHAN(i);
+			ccr |= PCC_CCR_LED_FAST_CHAN(i);
+		}
+		if (netdev->stats.tx_bytes != card->channel[i].prev_tx_bytes) {
+			card->channel[i].prev_tx_bytes = netdev->stats.tx_bytes;
+			ccr &= ~PCC_CCR_LED_MASK_CHAN(i);
+			ccr |= PCC_CCR_LED_FAST_CHAN(i);
+		}
+	}
+
+	/* write the new leds state */
+	pcan_write_reg(card, PCC_CCR, ccr);
+
+	/* restart timer (except if no more configured channels) */
+	if (up_count)
+		mod_timer(&card->led_timer, jiffies + HZ);
+}
+
+/*
+ * interrupt service routine
+ */
+static irqreturn_t pcan_isr(int irq, void *dev_id)
+{
+	struct pcan_pccard *card = dev_id;
+	int irq_handled;
+
+	/* prevent from infinite loop */
+	for (irq_handled = 0; irq_handled < PCC_ISR_MAX_LOOP; irq_handled++) {
+		/* handle shared interrupt and next loop */
+		int nothing_to_handle = 1;
+		int i;
+
+		/* check interrupt for each channel */
+		for (i = 0; i < card->chan_count; i++) {
+			struct net_device *netdev;
+
+			/*
+			 * check whether the card is present before calling
+			 * sja1000_interrupt() to speed up hotplug detection
+			 */
+			if (!pcan_pccard_present(card)) {
+				/* card unplugged during isr */
+				return IRQ_NONE;
+			}
+
+			/*
+			 * should check whether all or SJA1000_MAX_IRQ
+			 * interrupts have been handled: loop again to be sure.
+			 */
+			netdev = card->channel[i].netdev;
+			if (netdev &&
+			    sja1000_interrupt(irq, netdev) == IRQ_HANDLED)
+				nothing_to_handle = 0;
+		}
+
+		if (nothing_to_handle)
+			break;
+	}
+
+	return (irq_handled) ? IRQ_HANDLED : IRQ_NONE;
+}
+
+/*
+ * free all resources used by the channels and switch off leds and can power
+ */
+static void pcan_free_channels(struct pcan_pccard *card)
+{
+	int i;
+	u8 led_mask = 0;
+
+	for (i = 0; i < card->chan_count; i++) {
+		struct net_device *netdev;
+		char name[IFNAMSIZ];
+
+		led_mask |= PCC_LED(i);
+
+		netdev = card->channel[i].netdev;
+		if (!netdev)
+			continue;
+
+		strncpy(name, netdev->name, IFNAMSIZ);
+
+		unregister_sja1000dev(netdev);
+
+		free_sja1000dev(netdev);
+
+		dev_info(&card->pdev->dev, "%s removed\n", name);
+	}
+
+	/* do it only if device not removed */
+	if (pcan_pccard_present(card)) {
+		pcan_set_leds(card, led_mask, PCC_LED_OFF);
+		pcan_set_can_power(card, 0);
+	}
+}
+
+/*
+ * check if a CAN controller is present at the specified location
+ */
+static inline int pcan_channel_present(struct sja1000_priv *priv)
+{
+	/* make sure SJA1000 is in reset mode */
+	pcan_write_canreg(priv, REG_MOD, 1);
+	pcan_write_canreg(priv, REG_CDR, CDR_PELICAN);
+
+	/* read reset-values */
+	if (pcan_read_canreg(priv, REG_CDR) == CDR_PELICAN)
+		return 1;
+
+	return 0;
+}
+
+static int pcan_add_channels(struct pcan_pccard *card)
+{
+	struct pcmcia_device *pdev = card->pdev;
+	int i, err = 0;
+	u8 ccr = PCC_CCR_INIT;
+
+	/* init common registers (reset channels and leds off) */
+	card->ccr = ~ccr;
+	pcan_write_reg(card, PCC_CCR, ccr);
+
+	/* wait 2ms before unresetting channels */
+	mdelay(2);
+
+	ccr &= ~PCC_CCR_RST_ALL;
+	pcan_write_reg(card, PCC_CCR, ccr);
+
+	/* create one network device per channel detected */
+	for (i = 0; i < ARRAY_SIZE(card->channel); i++) {
+		struct net_device *netdev;
+		struct sja1000_priv *priv;
+
+		netdev = alloc_sja1000dev(0);
+		if (!netdev) {
+			err = -ENOMEM;
+			break;
+		}
+
+		/* update linkages */
+		priv = netdev_priv(netdev);
+		priv->priv = card;
+		SET_NETDEV_DEV(netdev, &pdev->dev);
+
+		priv->irq_flags = IRQF_SHARED;
+		netdev->irq = pdev->irq;
+		priv->reg_base = card->ioport_addr + PCC_CHAN_OFF(i);
+
+		/* check if channel is present */
+		if (!pcan_channel_present(priv)) {
+			dev_err(&pdev->dev, "channel %d not present\n", i);
+			free_sja1000dev(netdev);
+			continue;
+		}
+
+		priv->read_reg  = pcan_read_canreg;
+		priv->write_reg = pcan_write_canreg;
+		priv->can.clock.freq = PCC_CAN_CLOCK;
+		priv->ocr = PCC_OCR;
+		priv->cdr = PCC_CDR;
+
+		/* Neither a slave device distributes the clock */
+		if (i > 0)
+			priv->cdr |= CDR_CLK_OFF;
+
+		priv->flags |= SJA1000_CUSTOM_IRQ_HANDLER;
+
+		/* register SJA1000 device */
+		err = register_sja1000dev(netdev);
+		if (err) {
+			free_sja1000dev(netdev);
+			continue;
+		}
+
+		card->channel[i].netdev = netdev;
+		card->chan_count++;
+
+		/* set corresponding led on in the new ccr */
+		ccr &= ~PCC_CCR_LED_OFF_CHAN(i);
+
+		dev_info(&pdev->dev,
+			"%s on channel %d at 0x%p irq %d\n",
+			netdev->name, i, priv->reg_base, pdev->irq);
+	}
+
+	/* write new ccr (change leds state) */
+	pcan_write_reg(card, PCC_CCR, ccr);
+
+	return err;
+}
+
+static int pcan_conf_check(struct pcmcia_device *pdev, void *priv_data)
+{
+	pdev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
+	pdev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8; /* only */
+	pdev->io_lines = 10;
+
+	/* This reserves IO space but doesn't actually enable it */
+	return pcmcia_request_io(pdev);
+}
+
+/*
+ * free all resources used by the device
+ */
+static void pcan_free(struct pcmcia_device *pdev)
+{
+	struct pcan_pccard *card = pdev->priv;
+
+	if (!card)
+		return;
+
+	free_irq(pdev->irq, card);
+	pcan_stop_led_timer(card);
+
+	pcan_free_channels(card);
+
+	ioport_unmap(card->ioport_addr);
+
+	kfree(card);
+	pdev->priv = NULL;
+}
+
+/*
+ * setup PCMCIA socket and probe for PEAK-System PC-CARD
+ */
+static int __devinit pcan_probe(struct pcmcia_device *pdev)
+{
+	struct pcan_pccard *card;
+	int err;
+
+	pdev->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
+
+	err = pcmcia_loop_config(pdev, pcan_conf_check, NULL);
+	if (err) {
+		dev_err(&pdev->dev, "pcmcia_loop_config() error %d\n", err);
+		goto probe_err_1;
+	}
+
+	if (!pdev->irq) {
+		dev_err(&pdev->dev, "no irq assigned\n");
+		err = -ENODEV;
+		goto probe_err_1;
+	}
+
+	err = pcmcia_enable_device(pdev);
+	if (err) {
+		dev_err(&pdev->dev, "pcmcia_enable_device failed err=%d\n",
+			err);
+		goto probe_err_1;
+	}
+
+	card = kzalloc(sizeof(struct pcan_pccard), GFP_KERNEL);
+	if (!card) {
+		dev_err(&pdev->dev, "couldn't allocate card memory\n");
+		err = -ENOMEM;
+		goto probe_err_2;
+	}
+
+	card->pdev = pdev;
+	pdev->priv = card;
+
+	/* sja1000 api uses iomem */
+	card->ioport_addr = ioport_map(pdev->resource[0]->start,
+					resource_size(pdev->resource[0]));
+	if (!card->ioport_addr) {
+		dev_err(&pdev->dev, "couldn't map io port into io memory\n");
+		err = -ENOMEM;
+		goto probe_err_3;
+	}
+	card->fw_major = pcan_read_reg(card, PCC_FW_MAJOR);
+	card->fw_minor = pcan_read_reg(card, PCC_FW_MINOR);
+
+	/* display board name and firware version */
+	dev_info(&pdev->dev, "PEAK-System pcmcia card %s fw %d.%d\n",
+		pdev->prod_id[1] ? pdev->prod_id[1] : "PCAN-PC Card",
+		card->fw_major, card->fw_minor);
+
+	/* detect available channels */
+	pcan_add_channels(card);
+	if (!card->chan_count)
+		goto probe_err_4;
+
+	/* init the timer which controls the leds */
+	init_timer(&card->led_timer);
+	card->led_timer.function = pcan_led_timer;
+	card->led_timer.data = (unsigned long)card;
+
+	/* request the given irq */
+	err = request_irq(pdev->irq, &pcan_isr, IRQF_SHARED, PCC_NAME, card);
+	if (err) {
+		dev_err(&pdev->dev, "couldn't request irq%d\n", pdev->irq);
+		goto probe_err_5;
+	}
+
+	/* power on the connectors */
+	pcan_set_can_power(card, 1);
+
+	return 0;
+
+probe_err_5:
+	/* unregister can devices from network */
+	pcan_free_channels(card);
+
+probe_err_4:
+	ioport_unmap(card->ioport_addr);
+
+probe_err_3:
+	kfree(card);
+	pdev->priv = NULL;
+
+probe_err_2:
+	pcmcia_disable_device(pdev);
+
+probe_err_1:
+	return err;
+}
+
+/*
+ * release claimed resources
+ */
+static void pcan_remove(struct pcmcia_device *pdev)
+{
+	pcan_free(pdev);
+	pcmcia_disable_device(pdev);
+}
+
+static struct pcmcia_driver pcan_driver = {
+	.name = PCC_NAME,
+	.probe = pcan_probe,
+	.remove = pcan_remove,
+	.id_table = pcan_table,
+};
+
+static int __init pcan_init(void)
+{
+	return pcmcia_register_driver(&pcan_driver);
+}
+module_init(pcan_init);
+
+static void __exit pcan_exit(void)
+{
+	pcmcia_unregister_driver(&pcan_driver);
+}
+module_exit(pcan_exit);

drivers/net/can/usb/Kconfig

@@ -13,4 +13,10 @@ config CAN_ESD_USB2
           This driver supports the CAN-USB/2 interface
           from esd electronic system design gmbh (http://www.esd.eu).
 
+config CAN_PEAK_USB
+	tristate "PEAK PCAN-USB/USB Pro interfaces"
+	---help---
+	  This driver supports the PCAN-USB and PCAN-USB Pro adapters
+	  from PEAK-System Technik (http://www.peak-system.com).
+
 endmenu

drivers/net/can/usb/Makefile

@@ -4,5 +4,6 @@
 
 obj-$(CONFIG_CAN_EMS_USB) += ems_usb.o
 obj-$(CONFIG_CAN_ESD_USB2) += esd_usb2.o
+obj-$(CONFIG_CAN_PEAK_USB) += peak_usb/
 
 ccflags-$(CONFIG_CAN_DEBUG_DEVICES) := -DDEBUG

drivers/net/can/usb/peak_usb/Makefile

+obj-$(CONFIG_CAN_PEAK_USB) += peak_usb.o
+peak_usb-y = pcan_usb_core.o pcan_usb.o pcan_usb_pro.o

drivers/net/can/usb/peak_usb/pcan_usb_core.h

+/*
+ * CAN driver for PEAK System USB adapters
+ * Derived from the PCAN project file driver/src/pcan_usb_core.c
+ *
+ * Copyright (C) 2003-2010 PEAK System-Technik GmbH
+ * Copyright (C) 2010-2012 Stephane Grosjean <s.grosjean@peak-system.com>
+ *
+ * Many thanks to Klaus Hitschler <klaus.hitschler@gmx.de>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+#ifndef PCAN_USB_CORE_H
+#define PCAN_USB_CORE_H
+
+/* PEAK-System vendor id. */
+#define PCAN_USB_VENDOR_ID		0x0c72
+
+/* supported device ids. */
+#define PCAN_USB_PRODUCT_ID		0x000c
+#define PCAN_USBPRO_PRODUCT_ID		0x000d
+
+#define PCAN_USB_DRIVER_NAME		"peak_usb"
+
+/* number of urbs that are submitted for rx/tx per channel */
+#define PCAN_USB_MAX_RX_URBS		4
+#define PCAN_USB_MAX_TX_URBS		10
+
+/* usb adapters maximum channels per usb interface */
+#define PCAN_USB_MAX_CHANNEL		2
+
+/* maximum length of the usb commands sent to/received from  the devices */
+#define PCAN_USB_MAX_CMD_LEN		32
+
+struct peak_usb_device;
+
+/* PEAK-System USB adapter descriptor */
+struct peak_usb_adapter {
+	char *name;
+	u32 device_id;
+	struct can_clock clock;
+	struct can_bittiming_const bittiming_const;
+	unsigned int ctrl_count;
+
+	int (*intf_probe)(struct usb_interface *intf);
+
+	int (*dev_init)(struct peak_usb_device *dev);
+	void (*dev_exit)(struct peak_usb_device *dev);
+	void (*dev_free)(struct peak_usb_device *dev);
+	int (*dev_open)(struct peak_usb_device *dev);
+	int (*dev_close)(struct peak_usb_device *dev);
+	int (*dev_set_bittiming)(struct peak_usb_device *dev,
+					struct can_bittiming *bt);
+	int (*dev_set_bus)(struct peak_usb_device *dev, u8 onoff);
+	int (*dev_get_device_id)(struct peak_usb_device *dev, u32 *device_id);
+	int (*dev_decode_buf)(struct peak_usb_device *dev, struct urb *urb);
+	int (*dev_encode_msg)(struct peak_usb_device *dev, struct sk_buff *skb,
+					u8 *obuf, size_t *size);
+	int (*dev_start)(struct peak_usb_device *dev);
+	int (*dev_stop)(struct peak_usb_device *dev);
+	int (*dev_restart_async)(struct peak_usb_device *dev, struct urb *urb,
+					u8 *buf);
+	u8 ep_msg_in;
+	u8 ep_msg_out[PCAN_USB_MAX_CHANNEL];
+	u8 ts_used_bits;
+	u32 ts_period;
+	u8 us_per_ts_shift;
+	u32 us_per_ts_scale;
+
+	int rx_buffer_size;
+	int tx_buffer_size;
+	int sizeof_dev_private;
+};
+
+extern struct peak_usb_adapter pcan_usb;
+extern struct peak_usb_adapter pcan_usb_pro;
+
+struct peak_time_ref {
+	struct timeval tv_host_0, tv_host;
+	u32 ts_dev_1, ts_dev_2;
+	u64 ts_total;
+	u32 tick_count;
+	struct peak_usb_adapter *adapter;
+};
+
+struct peak_tx_urb_context {
+	struct peak_usb_device *dev;
+	u32 echo_index;
+	u8 dlc;
+	struct urb *urb;
+};
+
+#define PCAN_USB_STATE_CONNECTED	0x00000001
+#define PCAN_USB_STATE_STARTED		0x00000002
+
+/* PEAK-System USB device */
+struct peak_usb_device {
+	struct can_priv can;
+	struct peak_usb_adapter *adapter;
+	unsigned int ctrl_idx;
+	int open_time;
+	u32 state;
+
+	struct sk_buff *echo_skb[PCAN_USB_MAX_TX_URBS];
+
+	struct usb_device *udev;
+	struct net_device *netdev;
+
+	atomic_t active_tx_urbs;
+	struct usb_anchor tx_submitted;
+	struct peak_tx_urb_context tx_contexts[PCAN_USB_MAX_TX_URBS];
+
+	u8 *cmd_buf;
+	struct usb_anchor rx_submitted;
+
+	u32 device_number;
+	u8 device_rev;
+
+	u8 ep_msg_in;
+	u8 ep_msg_out;
+
+	u16 bus_load;
+
+	struct peak_usb_device *prev_siblings;
+	struct peak_usb_device *next_siblings;
+};
+
+void dump_mem(char *prompt, void *p, int l);
+
+/* common timestamp management */
+void peak_usb_init_time_ref(struct peak_time_ref *time_ref,
+			    struct peak_usb_adapter *adapter);
+void peak_usb_update_ts_now(struct peak_time_ref *time_ref, u32 ts_now);
+void peak_usb_set_ts_now(struct peak_time_ref *time_ref, u32 ts_now);
+void peak_usb_get_ts_tv(struct peak_time_ref *time_ref, u32 ts,
+			struct timeval *tv);
+
+void peak_usb_async_complete(struct urb *urb);
+void peak_usb_restart_complete(struct peak_usb_device *dev);
+#endif

drivers/net/can/usb/peak_usb/pcan_usb_pro.h

+/*
+ * CAN driver for PEAK System PCAN-USB Pro adapter
+ * Derived from the PCAN project file driver/src/pcan_usbpro_fw.h
+ *
+ * Copyright (C) 2003-2011 PEAK System-Technik GmbH
+ * Copyright (C) 2011-2012 Stephane Grosjean <s.grosjean@peak-system.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; version 2 of the License.
+ *
+ * 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.
+ */
+#ifndef PCAN_USB_PRO_H
+#define PCAN_USB_PRO_H
+
+/*
+ * USB Vendor request data types
+ */
+#define PCAN_USBPRO_REQ_INFO		0
+#define PCAN_USBPRO_REQ_FCT		2
+
+/* Vendor Request value for XXX_INFO */
+#define PCAN_USBPRO_INFO_BL		0
+#define PCAN_USBPRO_INFO_FW		1
+
+/* Vendor Request value for XXX_FCT */
+#define PCAN_USBPRO_FCT_DRVLD		5 /* tell device driver is loaded */
+
+/* PCAN_USBPRO_INFO_BL vendor request record type */
+struct __packed pcan_usb_pro_blinfo {
+	u32 ctrl_type;
+	u8  version[4];
+	u8  day;
+	u8  month;
+	u8  year;
+	u8  dummy;
+	u32 serial_num_hi;
+	u32 serial_num_lo;
+	u32 hw_type;
+	u32 hw_rev;
+};
+
+/* PCAN_USBPRO_INFO_FW vendor request record type */
+struct __packed pcan_usb_pro_fwinfo {
+	u32 ctrl_type;
+	u8  version[4];
+	u8  day;
+	u8  month;
+	u8  year;
+	u8  dummy;
+	u32 fw_type;
+};
+
+/*
+ * USB Command record types
+ */
+#define PCAN_USBPRO_SETBTR	0x02
+#define PCAN_USBPRO_SETBUSACT	0x04
+#define PCAN_USBPRO_SETSILENT	0x05
+#define PCAN_USBPRO_SETFILTR	0x0a
+#define PCAN_USBPRO_SETTS	0x10
+#define PCAN_USBPRO_GETDEVID	0x12
+#define PCAN_USBPRO_SETLED	0x1C
+#define PCAN_USBPRO_RXMSG8	0x80
+#define PCAN_USBPRO_RXMSG4	0x81
+#define PCAN_USBPRO_RXMSG0	0x82
+#define PCAN_USBPRO_RXRTR	0x83
+#define PCAN_USBPRO_RXSTATUS	0x84
+#define PCAN_USBPRO_RXTS	0x85
+#define PCAN_USBPRO_TXMSG8	0x41
+#define PCAN_USBPRO_TXMSG4	0x42
+#define PCAN_USBPRO_TXMSG0	0x43
+
+/* record structures */
+struct __packed pcan_usb_pro_btr {
+	u8  data_type;
+	u8  channel;
+	u16 dummy;
+	u32 CCBT;
+};
+
+struct __packed pcan_usb_pro_busact {
+	u8  data_type;
+	u8  channel;
+	u16 onoff;
+};
+
+struct __packed pcan_usb_pro_silent {
+	u8  data_type;
+	u8  channel;
+	u16 onoff;
+};
+
+struct __packed pcan_usb_pro_filter {
+	u8  data_type;
+	u8  dummy;
+	u16 filter_mode;
+};
+
+struct __packed pcan_usb_pro_setts {
+	u8  data_type;
+	u8  dummy;
+	u16 mode;
+};
+
+struct __packed pcan_usb_pro_devid {
+	u8  data_type;
+	u8  channel;
+	u16 dummy;
+	u32 serial_num;
+};
+
+struct __packed pcan_usb_pro_setled {
+	u8  data_type;
+	u8  channel;
+	u16 mode;
+	u32 timeout;
+};
+
+struct __packed pcan_usb_pro_rxmsg {
+	u8  data_type;
+	u8  client;
+	u8  flags;
+	u8  len;
+	u32 ts32;
+	u32 id;
+
+	u8  data[8];
+};
+
+#define PCAN_USBPRO_STATUS_ERROR	0x0001
+#define PCAN_USBPRO_STATUS_BUS		0x0002
+#define PCAN_USBPRO_STATUS_OVERRUN	0x0004
+#define PCAN_USBPRO_STATUS_QOVERRUN	0x0008
+
+struct __packed pcan_usb_pro_rxstatus {
+	u8  data_type;
+	u8  channel;
+	u16 status;
+	u32 ts32;
+	u32 err_frm;
+};
+
+struct __packed pcan_usb_pro_rxts {
+	u8  data_type;
+	u8  dummy[3];
+	u32 ts64[2];
+};
+
+struct __packed pcan_usb_pro_txmsg {
+	u8  data_type;
+	u8  client;
+	u8  flags;
+	u8  len;
+	u32 id;
+	u8  data[8];
+};
+
+union pcan_usb_pro_rec {
+	u8				data_type;
+	struct pcan_usb_pro_btr		btr;
+	struct pcan_usb_pro_busact	bus_act;
+	struct pcan_usb_pro_silent	silent_mode;
+	struct pcan_usb_pro_filter	filter_mode;
+	struct pcan_usb_pro_setts	ts;
+	struct pcan_usb_pro_devid	dev_id;
+	struct pcan_usb_pro_setled	set_led;
+	struct pcan_usb_pro_rxmsg	rx_msg;
+	struct pcan_usb_pro_rxstatus	rx_status;
+	struct pcan_usb_pro_rxts	rx_ts;
+	struct pcan_usb_pro_txmsg	tx_msg;
+};
+
+#endif