2 * Copyright (C) 2008 Per Dalen <per.dalen@cnw.se>
4 * Parts of this software are based on (derived) the following:
6 * - Kvaser linux driver, version 4.72 BETA
7 * Copyright (C) 2002-2007 KVASER AB
9 * - Lincan driver, version 0.3.3, OCERA project
10 * Copyright (C) 2004 Pavel Pisa
11 * Copyright (C) 2001 Arnaud Westenberg
13 * - Socketcan SJA1000 drivers
14 * Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
15 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
16 * Copyright (c) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
17 * 38106 Braunschweig, GERMANY
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the version 2 of the GNU General Public License
21 * as published by the Free Software Foundation
23 * This program is distributed in the hope that it will be useful, but
24 * WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 * General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software Foundation,
30 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/interrupt.h>
36 #include <linux/netdevice.h>
37 #include <linux/delay.h>
38 #include <linux/pci.h>
39 #include <linux/can.h>
40 #include <linux/can/dev.h>
41 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,16)
49 #define DRV_NAME "kvaser_pci"
51 MODULE_AUTHOR("Per Dalen <per.dalen@cnw.se>");
52 MODULE_DESCRIPTION("Socket-CAN driver for KVASER PCAN PCI cards");
53 MODULE_SUPPORTED_DEVICE("KVASER PCAN PCI CAN card");
54 MODULE_LICENSE("GPL v2");
56 #define MAX_NO_OF_CHANNELS 4 /* max no of channels on
61 struct pci_dev *pci_dev;
62 struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1];
63 void __iomem *conf_addr;
64 void __iomem *res_addr;
69 #define KVASER_PCI_CAN_CLOCK (16000000 / 2)
72 * The board configuration is probably following:
73 * RX1 is connected to ground.
74 * TX1 is not connected.
75 * CLKO is not connected.
76 * Setting the OCR register to 0xDA is a good idea.
77 * This means normal output mode , push-pull and the correct polarity.
79 #define KVASER_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
82 * In the CDR register, you should set CBP to 1.
83 * You will probably also want to set the clock divider value to 0
84 * (meaning divide-by-2), the Pelican bit, and the clock-off bit
85 * (you will have no need for CLKOUT anyway).
87 #define KVASER_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
90 * These register values are valid for revision 14 of the Xilinx logic.
92 #define XILINX_VERINT 7 /* Lower nibble simulate interrupts,
93 high nibble version number. */
95 #define XILINX_PRESUMED_VERSION 14
98 * Important S5920 registers
100 #define S5920_INTCSR 0x38
101 #define S5920_PTCR 0x60
102 #define INTCSR_ADDON_INTENABLE_M 0x2000
105 #define KVASER_PCI_PORT_BYTES 0x20
107 #define PCI_CONFIG_PORT_SIZE 0x80 /* size of the config io-memory */
108 #define PCI_PORT_SIZE 0x80 /* size of a channel io-memory */
109 #define PCI_PORT_XILINX_SIZE 0x08 /* size of a xilinx io-memory */
111 #define KVASER_PCI_VENDOR_ID1 0x10e8 /* the PCI device and vendor IDs */
112 #define KVASER_PCI_DEVICE_ID1 0x8406
114 #define KVASER_PCI_VENDOR_ID2 0x1a07 /* the PCI device and vendor IDs */
115 #define KVASER_PCI_DEVICE_ID2 0x0008
117 static struct pci_device_id kvaser_pci_tbl[] = {
118 {KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,},
119 {KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,},
123 MODULE_DEVICE_TABLE(pci, kvaser_pci_tbl);
125 static u8 kvaser_pci_read_reg(struct net_device *dev, int port)
127 return ioread8((void __iomem *)(dev->base_addr + port));
130 static void kvaser_pci_write_reg(struct net_device *dev, int port, u8 val)
132 iowrite8(val, (void __iomem *)(dev->base_addr + port));
135 static void kvaser_pci_disable_irq(struct net_device *dev)
137 struct sja1000_priv *priv = netdev_priv(dev);
138 struct kvaser_pci *board = priv->priv;
141 /* Disable interrupts from card */
142 tmp = ioread32(board->conf_addr + S5920_INTCSR);
143 tmp &= ~INTCSR_ADDON_INTENABLE_M;
144 iowrite32(tmp, board->conf_addr + S5920_INTCSR);
147 static void kvaser_pci_enable_irq(struct net_device *dev)
149 struct sja1000_priv *priv = netdev_priv(dev);
150 struct kvaser_pci *board = priv->priv;
153 /* Enable interrupts from card */
154 tmp = ioread32(board->conf_addr + S5920_INTCSR);
155 tmp |= INTCSR_ADDON_INTENABLE_M;
156 iowrite32(tmp, board->conf_addr + S5920_INTCSR);
159 static int number_of_sja1000_chip(void __iomem *base_addr)
164 for (i = 0; i < MAX_NO_OF_CHANNELS; i++) {
166 iowrite8(MOD_RM, base_addr +
167 (i * KVASER_PCI_PORT_BYTES) + REG_MOD);
168 status = ioread8(base_addr +
169 (i * KVASER_PCI_PORT_BYTES) + REG_MOD);
171 /* check reset bit */
172 if (!(status & MOD_RM))
179 static void kvaser_pci_del_chan(struct net_device *dev)
181 struct sja1000_priv *priv;
182 struct kvaser_pci *board;
187 priv = netdev_priv(dev);
194 dev_info(&board->pci_dev->dev, "Removing device %s\n",
197 for (i = 0; i < board->no_channels - 1; i++) {
198 if (board->slave_dev[i]) {
199 dev_info(&board->pci_dev->dev, "Removing device %s\n",
200 board->slave_dev[i]->name);
201 unregister_sja1000dev(board->slave_dev[i]);
202 free_sja1000dev(board->slave_dev[i]);
205 unregister_sja1000dev(dev);
207 /* Disable PCI interrupts */
208 kvaser_pci_disable_irq(dev);
210 pci_iounmap(board->pci_dev, (void __iomem *)dev->base_addr);
211 pci_iounmap(board->pci_dev, board->conf_addr);
212 pci_iounmap(board->pci_dev, board->res_addr);
214 free_sja1000dev(dev);
217 static int kvaser_pci_add_chan(struct pci_dev *pdev, int channel,
218 struct net_device **master_dev,
219 void __iomem *conf_addr,
220 void __iomem *res_addr,
221 unsigned long base_addr)
223 struct net_device *dev;
224 struct sja1000_priv *priv;
225 struct kvaser_pci *board;
228 dev = alloc_sja1000dev(sizeof(struct kvaser_pci));
232 priv = netdev_priv(dev);
235 board->pci_dev = pdev;
236 board->channel = channel;
239 board->conf_addr = conf_addr;
241 /*XILINX board wide address*/
242 board->res_addr = res_addr;
246 ioread8(board->res_addr + XILINX_VERINT) >> 4;
249 /* Assert PTADR# - we're in passive mode so the other bits are
251 iowrite32(0x80808080UL, board->conf_addr + S5920_PTCR);
253 /* Disable interrupts from card */
254 kvaser_pci_disable_irq(dev);
255 /* Enable interrupts from card */
256 kvaser_pci_enable_irq(dev);
258 struct sja1000_priv *master_priv = netdev_priv(*master_dev);
259 struct kvaser_pci *master_board = master_priv->priv;
260 master_board->slave_dev[channel - 1] = dev;
261 master_board->no_channels = channel + 1;
262 board->xilinx_ver = master_board->xilinx_ver;
265 dev->base_addr = base_addr + channel * KVASER_PCI_PORT_BYTES;
267 priv->read_reg = kvaser_pci_read_reg;
268 priv->write_reg = kvaser_pci_write_reg;
270 priv->can.bittiming.clock = KVASER_PCI_CAN_CLOCK;
272 priv->ocr = KVASER_PCI_OCR;
273 priv->cdr = KVASER_PCI_CDR;
275 /* Register and setup interrupt handling */
276 dev->irq = pdev->irq;
279 dev_info(&pdev->dev, "base_addr=%#lx conf_addr=%p irq=%d\n",
280 dev->base_addr, board->conf_addr, dev->irq);
282 SET_NETDEV_DEV(dev, &pdev->dev);
284 /* Register SJA1000 device */
285 err = register_sja1000dev(dev);
287 dev_err(&pdev->dev, "Registering device failed (err=%d)\n",
298 kvaser_pci_del_chan(dev);
302 static int __devinit kvaser_pci_init_one(struct pci_dev *pdev,
303 const struct pci_device_id *ent)
306 struct net_device *master_dev = NULL;
307 struct sja1000_priv *priv;
308 struct kvaser_pci *board;
310 void __iomem *base_addr = NULL;
311 void __iomem *conf_addr = NULL;
312 void __iomem *res_addr = NULL;
315 dev_info(&pdev->dev, "initializing device %04x:%04x\n",
316 pdev->vendor, pdev->device);
318 err = pci_enable_device(pdev);
322 err = pci_request_regions(pdev, DRV_NAME);
324 goto failure_release_pci;
327 conf_addr = pci_iomap(pdev, 0, PCI_CONFIG_PORT_SIZE);
328 if (conf_addr == 0) {
330 goto failure_iounmap;
333 /*XILINX board wide address*/
334 res_addr = pci_iomap(pdev, 2, PCI_PORT_XILINX_SIZE);
337 goto failure_iounmap;
340 base_addr = pci_iomap(pdev, 1, PCI_PORT_SIZE);
341 if (base_addr == 0) {
343 goto failure_iounmap;
346 no_channels = number_of_sja1000_chip(base_addr);
347 if (no_channels == 0) {
349 goto failure_iounmap;
352 for (i = 0; i < no_channels; i++) {
353 err = kvaser_pci_add_chan(pdev, i, &master_dev,
355 (unsigned long)base_addr);
357 goto failure_cleanup;
360 priv = netdev_priv(master_dev);
363 dev_info(&pdev->dev, "xilinx version=%d number of channels=%d\n",
364 board->xilinx_ver, board->no_channels);
366 pci_set_drvdata(pdev, master_dev);
370 kvaser_pci_del_chan(master_dev);
374 pci_iounmap(pdev, conf_addr);
376 pci_iounmap(pdev, res_addr);
378 pci_iounmap(pdev, base_addr);
380 pci_release_regions(pdev);
383 pci_disable_device(pdev);
390 static void __devexit kvaser_pci_remove_one(struct pci_dev *pdev)
392 struct net_device *dev = pci_get_drvdata(pdev);
394 kvaser_pci_del_chan(dev);
396 pci_release_regions(pdev);
397 pci_disable_device(pdev);
398 pci_set_drvdata(pdev, NULL);
401 static struct pci_driver kvaser_pci_driver = {
403 .id_table = kvaser_pci_tbl,
404 .probe = kvaser_pci_init_one,
405 .remove = __devexit_p(kvaser_pci_remove_one),
408 static int __init kvaser_pci_init(void)
410 return pci_register_driver(&kvaser_pci_driver);
413 static void __exit kvaser_pci_exit(void)
415 pci_unregister_driver(&kvaser_pci_driver);
418 module_init(kvaser_pci_init);
419 module_exit(kvaser_pci_exit);