2 * Copyright (C) 2009 Thomas Koerper <thomas.koerper@esd.eu>, esd gmbh
3 * derived from kernel/2.6/drivers/net/can/sja1000/esd_pci.c,
4 * * Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
5 * * Copyright (C) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
6 * * Copyright (C) 2009 Matthias Fuchs <matthias.fuchs@esd.eu>, esd gmbh
7 * and kernel/2.6/drivers/net/can/at91_can.c,
8 * * Copyright (C) 2007 by Hans J. Koch <hjk@linutronix.de>
9 * * Copyright (C) 2008 by Marc Kleine-Budde <kernel@pengutronix.de
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the version 2 of the GNU General Public License
13 * as published by the Free Software Foundation
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software Foundation,
22 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #include <linux/interrupt.h>
26 #include <linux/netdevice.h>
27 #include <linux/module.h>
28 #include <linux/kernel.h>
29 #include <linux/if_arp.h>
30 #include <linux/skbuff.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/errno.h>
34 #include <linux/init.h>
36 #include <linux/byteorder/generic.h>
37 #include <linux/pci.h>
38 #include <linux/pci_ids.h>
39 #include <socketcan/can.h>
40 #include <socketcan/can/error.h>
41 #include <socketcan/can/dev.h>
43 #define DRV_NAME "esd_pci331"
45 MODULE_AUTHOR("Thomas Koerper <thomas.koerper@esd.eu>");
46 MODULE_LICENSE("GPL v2");
47 MODULE_DESCRIPTION("Socket-CAN driver for the esd 331 CAN cards");
48 MODULE_DEVICE_TABLE(pci, esd331_pci_tbl);
49 MODULE_SUPPORTED_DEVICE("esd CAN-PCI/331, CAN-CPCI/331, CAN-PMC/331");
51 #ifndef PCI_DEVICE_ID_PLX_9030
52 # define PCI_DEVICE_ID_PLX_9030 0x9030
54 #ifndef PCI_DEVICE_ID_PLX_9050
55 # define PCI_DEVICE_ID_PLX_9050 0x9050
57 #ifndef PCI_VENDOR_ID_ESDGMBH
58 #define PCI_VENDOR_ID_ESDGMBH 0x12fe
61 #define ESD_PCI_SUB_SYS_ID_PCI331 0x0001
62 #define ESD_PCI_SUB_SYS_ID_PMC331 0x000C
64 /* Maximum number of interfaces supported per card */
65 #define ESD331_MAX_CAN 2
66 /* 331's fifo size. Don't change! */
67 #define ESD331_DPRSIZE 1024
68 /* Max. messages to handle per interrupt */
69 #define ESD331_MAX_INTERRUPT_WORK 8
70 #define ESD331_MAX_BOARD_MESSAGES 5
71 #define ESD331_RTR_FLAG 0x10
72 #define ESD331_ERR_OK 0x00
73 #define ESD331_ERR_WARN 0x40
74 #define ESD331_ERR_BUSOFF1 0x80
75 #define ESD331_ERR_BUSOFF2 0xc0
76 #define ESD331_CONF_OFFS_ICS 0x4c
77 #define ESD331_CONF_OFFS_MISC_CTRL 0x50
78 #define ESD331_OFFS_LINK_BASE 0x846
79 #define ESD331_OFFS_IRQ_ACK 0xc0100
80 #define ESD331_NETS_MASK 0x07
81 #define ESD331_EVENT_MASK 0x7f
82 #define ESD331_DLC_MASK 0x0f
83 #define ESD331_EFF_SUPP_FLAG 0x80
84 #define ESD331_IRQ_FLAG 0x00000004
85 #define ESD331_ENABLE_IRQ_FLAG 0x00000041
86 #define ESD331_STOP_OS 0x40000010
87 #define ESD331_RESTART_OS 0x40000028
89 #define ESD331_I20_BCAN 0
90 #define ESD331_I20_ENABLE 1
91 #define ESD331_I20_BAUD 4
92 #define ESD331_I20_TXDONE 5
93 #define ESD331_I20_TXTOUT 12
94 #define ESD331_I20_ERROR 13
95 #define ESD331_I20_BOARD 14
96 #define ESD331_I20_EX_BCAN 15
97 #define ESD331_I20_EX_TXDONE 16
98 #define ESD331_I20_EX_TXTOUT 17
99 #define ESD331_I20_BOARD2 20
100 #define ESD331_I20_FAST 21
102 #define ESD331_ECHO_SKB_MAX 1
104 static struct pci_device_id esd331_pci_tbl[] = {
105 {PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
106 PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PCI331},
107 {PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,
108 PCI_VENDOR_ID_ESDGMBH, ESD_PCI_SUB_SYS_ID_PMC331},
112 struct esd331_can_msg {
121 } __attribute__((packed));
122 #define ESD331_CM_SSIZE (sizeof(struct esd331_can_msg) / sizeof(u16))
127 } __attribute__((packed));
135 struct esd331_can_msg rx_buff[ESD331_DPRSIZE];
140 struct esd331_can_msg tx_buff[ESD331_DPRSIZE];
141 } __attribute__((packed));
144 struct pci_dev *pci_dev;
145 struct net_device *dev[ESD331_MAX_CAN];
146 void __iomem *conf_addr;
147 void __iomem *base_addr1;
148 void __iomem *base_addr2;
149 spinlock_t irq_lock; /* locks access to card's fifo */
150 struct esd331_dpr *dpr;
156 struct can_priv can; /* must be the first member! */
157 struct esd331_pci *board;
161 struct esd331_baud_entry {
166 static struct esd331_baud_entry esd331_baud_table[] = {
186 static void esd331_reset(void *pci331_confspace, int wait_for_restart)
189 void __iomem *addr = pci331_confspace + ESD331_CONF_OFFS_MISC_CTRL;
192 data |= ESD331_STOP_OS;
197 data &= ~ESD331_RESTART_OS;
200 if (wait_for_restart)
201 msleep_interruptible(3500);
204 static struct esd331_dpr *esd331_init_pointer(void __iomem *pci331_space2)
207 struct esd331_idp *idp;
208 void __iomem *ptr = pci331_space2 + ESD331_OFFS_LINK_BASE;
211 data = (data << 8) + readb(ptr++);
212 data = (data << 8) + readb(ptr++);
213 data = (data << 8) + readb(ptr++);
215 idp = (struct esd331_idp *)(pci331_space2 + data);
216 data = idp->buffer[0];
217 data = (data << 8) + idp->buffer[1];
218 data = (data << 8) + idp->buffer[2];
219 data = (data << 8) + idp->buffer[3];
221 return (struct esd331_dpr *)(pci331_space2 + data);
224 static void esd331_enable_irq(void *pci331_confspace)
226 void __iomem *addr = pci331_confspace + ESD331_CONF_OFFS_ICS;
230 data |= ESD331_ENABLE_IRQ_FLAG;
234 static void esd331_disable_irq(void *pci331_confspace)
236 void __iomem *addr = pci331_confspace + ESD331_CONF_OFFS_ICS;
240 data &= ~ESD331_ENABLE_IRQ_FLAG;
244 static int esd331_write(struct esd331_can_msg *mesg, struct esd331_pci *board)
249 unsigned long irq_flags;
250 int err = -EAGAIN; /* = card's fifo full */
253 spin_lock_irqsave(&board->irq_lock, irq_flags);
255 out = be16_to_cpu(readw(&board->dpr->rx_ou));
256 in = be16_to_cpu(readw(&board->dpr->rx_in));
258 in_new = (in + 1) % ESD331_DPRSIZE;
265 ptr2 = (u16 *)&board->dpr->rx_buff[in];
266 for (i = 0; i < ESD331_CM_SSIZE; i++)
267 writew(*ptr1++, ptr2++);
269 in_new = cpu_to_be16(in_new);
271 writew(in_new, &board->dpr->rx_in);
276 spin_unlock_irqrestore(&board->irq_lock, irq_flags);
280 static int esd331_read(struct esd331_can_msg *mesg, struct esd331_pci *board)
284 unsigned long irq_flags;
287 spin_lock_irqsave(&board->irq_lock, irq_flags);
289 out = be16_to_cpu(readw(&board->dpr->tx_ou));
290 in = be16_to_cpu(readw(&board->dpr->tx_in));
298 ptr2 = (u16 *)&board->dpr->tx_buff[out];
299 for (ll = 0; ll < ESD331_CM_SSIZE; ll++)
300 *ptr1++ = readw(ptr2++);
303 out %= ESD331_DPRSIZE;
306 writew(cpu_to_be16(out), &board->dpr->tx_ou);
308 mesg->id = be16_to_cpu(mesg->id);
309 mesg->len = be16_to_cpu(mesg->len);
310 mesg->x1 = be16_to_cpu(mesg->x1);
311 mesg->x2 = be16_to_cpu(mesg->x2);
312 mesg->x3 = be16_to_cpu(mesg->x3);
317 spin_unlock_irqrestore(&board->irq_lock, irq_flags);
321 static int esd331_write_allid(u8 net, struct esd331_pci *board)
323 struct esd331_can_msg mesg;
326 memset(&mesg, 0, sizeof(mesg));
328 mesg.cmmd = ESD331_I20_ENABLE;
331 for (id = 0; id < 2048; id++) {
334 mesg.id = cpu_to_be16(id);
336 while (esd331_write(&mesg, board) && (retryCount--))
346 static int esd331_write_fast(struct esd331_pci *board)
348 struct esd331_can_msg mesg;
350 memset(&mesg, 0, sizeof(mesg));
351 mesg.cmmd = ESD331_I20_FAST;
353 return esd331_write(&mesg, board);
356 static int esd331_write_baud(u8 pci331net, int index, struct esd331_pci *board)
358 struct esd331_can_msg mesg;
360 memset(&mesg, 0, sizeof(mesg));
361 mesg.cmmd = ESD331_I20_BAUD;
362 mesg.net = pci331net;
363 mesg.data[0] = (u8)(index >> 8);
364 mesg.data[1] = (u8)index;
366 return esd331_write(&mesg, board);
369 static int esd331_read_features(struct esd331_pci *board)
371 struct esd331_can_msg msg;
372 int max_msg = ESD331_MAX_BOARD_MESSAGES;
374 board->net_count = 0;
377 while ((esd331_read(&msg, board) == 0) && (max_msg--)) {
378 if (msg.cmmd == ESD331_I20_BOARD) {
379 u8 magic = (msg.x1 >> 8);
382 u8 features = (u8)msg.x1;
383 u8 nets = (features & ESD331_NETS_MASK);
385 if (nets <= ESD331_MAX_CAN)
386 board->net_count = nets;
388 if (features & ESD331_EFF_SUPP_FLAG)
391 } else if (msg.cmmd == ESD331_I20_BOARD2) {
392 u8 features = msg.net;
394 if (features & ESD331_EFF_SUPP_FLAG)
397 if (board->net_count == 0) {
398 u8 nets = (features & ESD331_NETS_MASK);
400 if (nets <= ESD331_MAX_CAN)
401 board->net_count = nets;
406 return (board->net_count < 1) ? -EIO : 0;
409 static int esd331_create_err_frame(struct net_device *dev, canid_t idflags,
412 struct net_device_stats *stats;
413 struct can_frame *cf;
416 skb = alloc_can_err_skb(dev, &cf);
417 if (unlikely(skb == NULL))
420 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
421 stats = can_get_stats(dev);
426 cf->can_id |= idflags;
431 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
432 dev->last_rx = jiffies;
435 stats->rx_bytes += cf->can_dlc;
440 static void esd331_irq_rx(struct net_device *dev, struct esd331_can_msg *msg,
443 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
444 struct net_device_stats *stats = can_get_stats(dev);
446 struct net_device_stats *stats = &dev->stats;
448 struct can_frame *cfrm;
452 skb = alloc_can_skb(dev, &cfrm);
453 if (unlikely(skb == NULL)) {
459 cfrm->can_id = (msg->id << 16);
460 cfrm->can_id |= (msg->x2);
462 cfrm->can_id = msg->id;
464 if (msg->len & ESD331_RTR_FLAG)
465 cfrm->can_id |= CAN_RTR_FLAG;
468 cfrm->can_id |= CAN_EFF_FLAG;
470 cfrm->can_dlc = get_can_dlc(msg->len & ESD331_DLC_MASK);
472 for (i = 0; i < cfrm->can_dlc; ++i)
473 cfrm->data[i] = msg->data[i];
477 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
478 dev->last_rx = jiffies;
481 stats->rx_bytes += cfrm->can_dlc;
484 static void esd331_handle_errmsg(struct net_device *dev,
485 struct esd331_can_msg *msg)
487 struct esd331_priv *priv = netdev_priv(dev);
489 if (msg->id & ESD331_EVENT_MASK)
492 switch (msg->data[1]) {
494 if (priv->can.state != CAN_STATE_STOPPED)
495 priv->can.state = CAN_STATE_ERROR_ACTIVE;
498 case ESD331_ERR_WARN:
499 if ((priv->can.state != CAN_STATE_ERROR_WARNING)
500 && (priv->can.state != CAN_STATE_STOPPED)) {
501 priv->can.can_stats.error_warning++;
502 priv->can.state = CAN_STATE_ERROR_WARNING;
504 /* might be RX warning, too... */
505 esd331_create_err_frame(dev, CAN_ERR_CRTL,
506 CAN_ERR_CRTL_TX_WARNING);
510 case ESD331_ERR_BUSOFF1:
511 case ESD331_ERR_BUSOFF2:
512 if ((priv->can.state != CAN_STATE_BUS_OFF)
513 && (priv->can.state != CAN_STATE_STOPPED)) {
514 priv->can.state = CAN_STATE_BUS_OFF;
515 esd331_create_err_frame(dev, CAN_ERR_BUSOFF, 0);
526 static void esd331_handle_messages(struct esd331_pci *board)
528 struct net_device *dev;
529 struct esd331_priv *priv;
530 struct net_device_stats *stats;
531 struct esd331_can_msg msg;
532 int msg_count = ESD331_MAX_INTERRUPT_WORK;
534 while ((esd331_read(&msg, board) == 0) && (msg_count--)) {
535 if (unlikely((msg.net >= ESD331_MAX_CAN)
536 || (board->dev[msg.net] == NULL)))
539 dev = board->dev[msg.net];
540 priv = netdev_priv(dev);
541 if (priv->can.state == CAN_STATE_STOPPED)
544 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
545 stats = can_get_stats(dev);
551 case ESD331_I20_BCAN:
552 case ESD331_I20_EX_BCAN:
553 esd331_irq_rx(dev, &msg,
554 (msg.cmmd == ESD331_I20_EX_BCAN));
557 case ESD331_I20_TXDONE:
558 case ESD331_I20_EX_TXDONE:
560 stats->tx_bytes += msg.x1;
561 can_get_echo_skb(dev, 0);
562 netif_wake_queue(dev);
565 case ESD331_I20_TXTOUT:
566 case ESD331_I20_EX_TXTOUT:
569 can_free_echo_skb(dev, 0);
570 netif_wake_queue(dev);
573 case ESD331_I20_ERROR:
574 esd331_handle_errmsg(dev, &msg);
583 static int esd331_all_nets_stopped(struct esd331_pci *board)
587 for (i = 0; i < ESD331_MAX_CAN; i++) {
588 if (board->dev[i] == NULL) {
591 struct esd331_priv *priv = netdev_priv(board->dev[i]);
593 if (priv->can.state != CAN_STATE_STOPPED)
601 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,19)
602 irqreturn_t esd331_interrupt(int irq, void *dev_id, struct pt_regs *regs)
604 irqreturn_t esd331_interrupt(int irq, void *dev_id)
607 struct esd331_pci *board = (struct esd331_pci *)dev_id;
608 void __iomem *ics = board->conf_addr + ESD331_CONF_OFFS_ICS;
610 if (!(readl(ics) & ESD331_IRQ_FLAG))
613 writew(0xffff, board->base_addr2 + ESD331_OFFS_IRQ_ACK);
614 esd331_handle_messages(board);
619 /* also enables interrupt when no other net on card is openened yet */
620 static int esd331_open(struct net_device *dev)
622 struct esd331_priv *priv = netdev_priv(dev);
625 err = open_candev(dev);
629 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
630 memset(&priv->can.net_stats, 0, sizeof(priv->can.net_stats));
633 if (esd331_all_nets_stopped(priv->board))
634 esd331_enable_irq(priv->board->conf_addr);
636 priv->can.state = CAN_STATE_ERROR_ACTIVE;
637 netif_start_queue(dev);
642 /* also disables interrupt when all other nets on card are closed already*/
643 static int esd331_close(struct net_device *dev)
645 struct esd331_priv *priv = netdev_priv(dev);
647 priv->can.state = CAN_STATE_STOPPED;
648 netif_stop_queue(dev);
651 if (esd331_all_nets_stopped(priv->board))
652 esd331_disable_irq(priv->board->conf_addr);
657 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,32)
658 static int esd331_start_xmit(struct sk_buff *skb, struct net_device *dev)
660 static netdev_tx_t esd331_start_xmit(struct sk_buff *skb,
661 struct net_device *dev)
664 struct esd331_priv *priv = netdev_priv(dev);
665 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
666 struct net_device_stats *stats = can_get_stats(dev);
668 struct net_device_stats *stats = &dev->stats;
670 struct can_frame *cf = (struct can_frame *)skb->data;
671 struct esd331_can_msg msg;
674 if (can_dropped_invalid_skb(dev, skb))
677 if ((cf->can_id & CAN_EFF_FLAG) && (priv->board->eff_supp == 0)) {
683 memset(&msg, 0, sizeof(msg));
684 if (cf->can_id & CAN_EFF_FLAG) {
685 msg.cmmd = ESD331_I20_EX_BCAN;
686 msg.id = cpu_to_be16((cf->can_id & CAN_EFF_MASK) >> 16);
687 msg.x2 = cpu_to_be16(cf->can_id & CAN_EFF_MASK);
689 msg.cmmd = ESD331_I20_BCAN;
690 msg.id = cpu_to_be16(cf->can_id & CAN_EFF_MASK);
692 msg.x1 = cpu_to_be16(cf->can_dlc);
693 msg.net = priv->boards_net;
694 msg.len = cpu_to_be16((cf->can_id & CAN_RTR_FLAG) ?
695 cf->can_dlc | ESD331_RTR_FLAG : cf->can_dlc);
697 for (i = 0; i < cf->can_dlc; i++)
698 msg.data[i] = cf->data[i];
700 can_put_echo_skb(skb, dev, 0);
701 if (unlikely(esd331_write(&msg, priv->board))) {
702 can_free_echo_skb(dev, 0);
703 dev_err(ND2D(dev), "Couldn't write frame to card's FIFO!\n");
708 netif_stop_queue(dev);
709 dev->trans_start = jiffies;
714 static int esd331_set_bittiming(struct net_device *dev)
716 struct esd331_priv *priv = netdev_priv(dev);
719 for (i = 0; i < ARRAY_SIZE(esd331_baud_table); i++) {
720 if (priv->can.bittiming.bitrate == esd331_baud_table[i].rate) {
721 return esd331_write_baud(priv->boards_net,
722 esd331_baud_table[i].index, priv->board);
729 static int esd331_set_mode(struct net_device *dev, enum can_mode mode)
731 struct esd331_priv *priv = netdev_priv(dev);
735 priv->can.state = CAN_STATE_ERROR_ACTIVE;
736 if (netif_queue_stopped(dev))
737 netif_wake_queue(dev);
748 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,28)
749 static const struct net_device_ops esd331_netdev_ops = {
750 .ndo_open = esd331_open,
751 .ndo_stop = esd331_close,
752 .ndo_start_xmit = esd331_start_xmit,
756 static struct net_device *__devinit esd331_pci_add_chan(struct pci_dev *pdev,
757 struct esd331_pci *board, u8 boards_net)
759 struct net_device *dev;
760 struct esd331_priv *priv;
763 dev = alloc_candev(sizeof(*priv), ESD331_ECHO_SKB_MAX);
765 return ERR_PTR(-ENOMEM);
767 priv = netdev_priv(dev);
768 priv->boards_net = boards_net;
771 SET_NETDEV_DEV(dev, &pdev->dev);
773 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,28)
774 dev->netdev_ops = &esd331_netdev_ops;
776 dev->open = esd331_open;
777 dev->stop = esd331_close;
778 dev->hard_start_xmit = esd331_start_xmit;
781 dev->irq = pdev->irq;
782 /* Set and enable PCI interrupts */
783 dev->flags |= IFF_ECHO;
785 priv->can.do_set_bittiming = esd331_set_bittiming;
786 priv->can.do_set_mode = esd331_set_mode;
787 priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
789 err = register_candev(dev);
791 dev_err(&pdev->dev, "registering candev failed\n");
796 dev_info(&pdev->dev, "device %s registered\n", dev->name);
801 static int __devinit esd331_pci_init_one(struct pci_dev *pdev,
802 const struct pci_device_id *ent)
804 struct esd331_pci *board;
807 int read_features = 0;
810 "Initializing device %04x:%04x %04x:%04x\n",
811 pdev->vendor, pdev->device,
812 pdev->subsystem_vendor, pdev->subsystem_device);
814 board = kzalloc(sizeof(*board), GFP_KERNEL);
818 err = pci_enable_device(pdev);
822 err = pci_request_regions(pdev, DRV_NAME);
826 board->conf_addr = pci_iomap(pdev, 0, 0);
827 if (board->conf_addr == NULL) {
829 goto failure_release_pci;
831 board->base_addr1 = pci_iomap(pdev, 2, 0);
832 if (board->base_addr1 == NULL) {
834 goto failure_iounmap_conf;
836 board->base_addr2 = pci_iomap(pdev, 3, 0);
837 if (board->base_addr2 == NULL) {
839 goto failure_iounmap_base1;
842 spin_lock_init(&board->irq_lock);
845 board->dpr = esd331_init_pointer(board->base_addr1);
846 err = esd331_read_features(board);
848 /* esd331_read_features() works only after board reset */
849 /* So if failed: reset board and retry: */
850 if (!read_features) {
852 esd331_reset(board->conf_addr, 1);
856 goto failure_iounmap_base2;
859 for (i = 0; i < board->net_count; ++i) {
860 board->dev[i] = esd331_pci_add_chan(pdev, board, i);
861 if (IS_ERR(board->dev[i])) {
862 err = PTR_ERR(board->dev[i]);
863 goto failure_iounmap_base2;
865 if (esd331_write_allid(i, board)) {
866 dev_err(&pdev->dev, "device %s failed to enable all "
867 "IDs\n", board->dev[i]->name);
871 if (esd331_write_fast(board))
872 dev_err(&pdev->dev, "failed to enable fast mode\n");
874 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
875 err = request_irq(pdev->irq, &esd331_interrupt, SA_SHIRQ, "pci331",
878 err = request_irq(pdev->irq, &esd331_interrupt, IRQF_SHARED, "pci331",
883 goto failure_iounmap_base2;
885 pci_set_drvdata(pdev, board);
888 failure_iounmap_base2:
889 pci_iounmap(pdev, board->base_addr2);
891 failure_iounmap_base1:
892 pci_iounmap(pdev, board->base_addr1);
894 failure_iounmap_conf:
895 pci_iounmap(pdev, board->conf_addr);
898 pci_release_regions(pdev);
906 static void __devexit esd331_pci_remove_one(struct pci_dev *pdev)
908 struct esd331_pci *board = pci_get_drvdata(pdev);
911 esd331_disable_irq(board->conf_addr);
912 free_irq(pdev->irq, (void *)board);
914 for (i = 0; i < ESD331_MAX_CAN; i++) {
915 if (board->dev[i] == NULL)
918 unregister_candev(board->dev[i]);
919 free_netdev(board->dev[i]);
922 esd331_reset(board->conf_addr, 0); /* 0 = No wait for restart here */
923 /* If module is reloaded too early, it will try a reset with waiting */
925 pci_iounmap(pdev, board->base_addr2);
926 pci_iounmap(pdev, board->base_addr1);
927 pci_iounmap(pdev, board->conf_addr);
928 pci_release_regions(pdev);
930 pci_disable_device(pdev);
931 pci_set_drvdata(pdev, NULL);
936 static struct pci_driver esd331_pci_driver = {
938 .id_table = esd331_pci_tbl,
939 .probe = esd331_pci_init_one,
940 .remove = __devexit_p(esd331_pci_remove_one), };
942 static int __init esd331_pci_init(void)
944 printk(KERN_INFO "%s CAN netdevice driver\n", DRV_NAME);
945 return pci_register_driver(&esd331_pci_driver);
948 static void __exit esd331_pci_exit(void)
950 pci_unregister_driver(&esd331_pci_driver);
951 printk(KERN_INFO "%s driver removed\n", DRV_NAME);
954 module_init(esd331_pci_init);
955 module_exit(esd331_pci_exit);