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>
45 #define DRV_NAME "kvaser_pci"
47 MODULE_AUTHOR("Per Dalen <per.dalen@cnw.se>");
48 MODULE_DESCRIPTION("Socket-CAN driver for KVASER PCAN PCI cards");
49 MODULE_SUPPORTED_DEVICE("KVASER PCAN PCI CAN card");
50 MODULE_LICENSE("GPL v2");
52 #define MAX_NO_OF_CHANNELS 4 /* max no of channels on a single card */
56 struct pci_dev *pci_dev;
57 struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1];
58 void __iomem *conf_addr;
59 void __iomem *res_addr;
64 #define KVASER_PCI_CAN_CLOCK (16000000 / 2)
67 * The board configuration is probably following:
68 * RX1 is connected to ground.
69 * TX1 is not connected.
70 * CLKO is not connected.
71 * Setting the OCR register to 0xDA is a good idea.
72 * This means normal output mode , push-pull and the correct polarity.
74 #define KVASER_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
77 * In the CDR register, you should set CBP to 1.
78 * You will probably also want to set the clock divider value to 0
79 * (meaning divide-by-2), the Pelican bit, and the clock-off bit
80 * (you will have no need for CLKOUT anyway).
82 #define KVASER_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
85 * These register values are valid for revision 14 of the Xilinx logic.
87 #define XILINX_VERINT 7 /* Lower nibble simulate interrupts,
88 high nibble version number. */
90 #define XILINX_PRESUMED_VERSION 14
93 * Important S5920 registers
95 #define S5920_INTCSR 0x38
96 #define S5920_PTCR 0x60
97 #define INTCSR_ADDON_INTENABLE_M 0x2000
100 #define KVASER_PCI_PORT_BYTES 0x20
102 #define PCI_CONFIG_PORT_SIZE 0x80 /* size of the config io-memory */
103 #define PCI_PORT_SIZE 0x80 /* size of a channel io-memory */
104 #define PCI_PORT_XILINX_SIZE 0x08 /* size of a xilinx io-memory */
106 #define KVASER_PCI_VENDOR_ID1 0x10e8 /* the PCI device and vendor IDs */
107 #define KVASER_PCI_DEVICE_ID1 0x8406
109 #define KVASER_PCI_VENDOR_ID2 0x1a07 /* the PCI device and vendor IDs */
110 #define KVASER_PCI_DEVICE_ID2 0x0008
112 static struct pci_device_id kvaser_pci_tbl[] = {
113 {KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,},
114 {KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,},
118 MODULE_DEVICE_TABLE(pci, kvaser_pci_tbl);
120 static u8 kvaser_pci_read_reg(const struct net_device *dev, int port)
122 return ioread8((void __iomem *)(dev->base_addr + port));
125 static void kvaser_pci_write_reg(const struct net_device *dev, int port, u8 val)
127 iowrite8(val, (void __iomem *)(dev->base_addr + port));
130 static void kvaser_pci_disable_irq(struct net_device *dev)
132 struct sja1000_priv *priv = netdev_priv(dev);
133 struct kvaser_pci *board = priv->priv;
136 /* Disable interrupts from card */
137 intcsr = ioread32(board->conf_addr + S5920_INTCSR);
138 intcsr &= ~INTCSR_ADDON_INTENABLE_M;
139 iowrite32(intcsr, board->conf_addr + S5920_INTCSR);
142 static void kvaser_pci_enable_irq(struct net_device *dev)
144 struct sja1000_priv *priv = netdev_priv(dev);
145 struct kvaser_pci *board = priv->priv;
148 /* Enable interrupts from card */
149 tmp_en_io = ioread32(board->conf_addr + S5920_INTCSR);
150 tmp_en_io |= INTCSR_ADDON_INTENABLE_M;
151 iowrite32(tmp_en_io, board->conf_addr + S5920_INTCSR);
154 static int number_of_sja1000_chip(void __iomem *base_addr)
159 for (i = 0; i < MAX_NO_OF_CHANNELS; i++) {
161 iowrite8(MOD_RM, base_addr +
162 (i * KVASER_PCI_PORT_BYTES) + REG_MOD);
163 status = ioread8(base_addr +
164 (i * KVASER_PCI_PORT_BYTES) + REG_MOD);
165 /* check reset bit */
166 if (!(status & MOD_RM))
173 static void kvaser_pci_del_chan(struct net_device *dev)
175 struct sja1000_priv *priv;
176 struct kvaser_pci *board;
181 priv = netdev_priv(dev);
186 dev_info(&board->pci_dev->dev, "Removing device %s\n",
189 /* Disable PCI interrupts */
190 kvaser_pci_disable_irq(dev);
192 for (i = 0; i < board->no_channels - 1; i++) {
193 if (board->slave_dev[i]) {
194 dev_info(&board->pci_dev->dev, "Removing device %s\n",
195 board->slave_dev[i]->name);
196 unregister_sja1000dev(board->slave_dev[i]);
197 free_sja1000dev(board->slave_dev[i]);
200 unregister_sja1000dev(dev);
202 pci_iounmap(board->pci_dev, (void __iomem *)dev->base_addr);
203 pci_iounmap(board->pci_dev, board->conf_addr);
204 pci_iounmap(board->pci_dev, board->res_addr);
206 free_sja1000dev(dev);
209 static int kvaser_pci_add_chan(struct pci_dev *pdev, int channel,
210 struct net_device **master_dev,
211 void __iomem *conf_addr,
212 void __iomem *res_addr,
213 unsigned long base_addr)
215 struct net_device *dev;
216 struct sja1000_priv *priv;
217 struct kvaser_pci *board;
220 dev = alloc_sja1000dev(sizeof(struct kvaser_pci));
224 priv = netdev_priv(dev);
227 board->pci_dev = pdev;
228 board->channel = channel;
231 board->conf_addr = conf_addr;
233 /* XILINX board wide address */
234 board->res_addr = res_addr;
238 ioread8(board->res_addr + XILINX_VERINT) >> 4;
241 /* Assert PTADR# - we're in passive mode so the other bits are
243 iowrite32(0x80808080UL, board->conf_addr + S5920_PTCR);
245 /* Enable interrupts from card */
246 kvaser_pci_enable_irq(dev);
248 struct sja1000_priv *master_priv = netdev_priv(*master_dev);
249 struct kvaser_pci *master_board = master_priv->priv;
250 master_board->slave_dev[channel - 1] = dev;
251 master_board->no_channels = channel + 1;
252 board->xilinx_ver = master_board->xilinx_ver;
255 dev->base_addr = base_addr + channel * KVASER_PCI_PORT_BYTES;
257 priv->read_reg = kvaser_pci_read_reg;
258 priv->write_reg = kvaser_pci_write_reg;
260 priv->can.clock.freq = KVASER_PCI_CAN_CLOCK;
262 priv->ocr = KVASER_PCI_OCR;
263 priv->cdr = KVASER_PCI_CDR;
265 priv->irq_flags = IRQF_SHARED;
266 dev->irq = pdev->irq;
270 dev_info(&pdev->dev, "base_addr=%#lx conf_addr=%p irq=%d\n",
271 dev->base_addr, board->conf_addr, dev->irq);
273 SET_NETDEV_DEV(dev, &pdev->dev);
275 /* Register SJA1000 device */
276 err = register_sja1000dev(dev);
278 dev_err(&pdev->dev, "Registering device failed (err=%d)\n",
289 kvaser_pci_del_chan(dev);
293 static int __devinit kvaser_pci_init_one(struct pci_dev *pdev,
294 const struct pci_device_id *ent)
297 struct net_device *master_dev = NULL;
298 struct sja1000_priv *priv;
299 struct kvaser_pci *board;
301 void __iomem *base_addr = NULL;
302 void __iomem *conf_addr = NULL;
303 void __iomem *res_addr = NULL;
306 dev_info(&pdev->dev, "initializing device %04x:%04x\n",
307 pdev->vendor, pdev->device);
309 err = pci_enable_device(pdev);
313 err = pci_request_regions(pdev, DRV_NAME);
315 goto failure_release_pci;
318 conf_addr = pci_iomap(pdev, 0, PCI_CONFIG_PORT_SIZE);
319 if (conf_addr == NULL) {
321 goto failure_release_regions;
324 /* XILINX board wide address */
325 res_addr = pci_iomap(pdev, 2, PCI_PORT_XILINX_SIZE);
326 if (res_addr == NULL) {
328 goto failure_iounmap;
331 base_addr = pci_iomap(pdev, 1, PCI_PORT_SIZE);
332 if (base_addr == NULL) {
334 goto failure_iounmap;
337 no_channels = number_of_sja1000_chip(base_addr);
338 if (no_channels == 0) {
340 goto failure_iounmap;
343 for (i = 0; i < no_channels; i++) {
344 err = kvaser_pci_add_chan(pdev, i, &master_dev,
346 (unsigned long)base_addr);
348 goto failure_cleanup;
351 priv = netdev_priv(master_dev);
354 dev_info(&pdev->dev, "xilinx version=%d number of channels=%d\n",
355 board->xilinx_ver, board->no_channels);
357 pci_set_drvdata(pdev, master_dev);
361 kvaser_pci_del_chan(master_dev);
364 if (conf_addr != NULL)
365 pci_iounmap(pdev, conf_addr);
366 if (res_addr != NULL)
367 pci_iounmap(pdev, res_addr);
368 if (base_addr != NULL)
369 pci_iounmap(pdev, base_addr);
371 failure_release_regions:
372 pci_release_regions(pdev);
375 pci_disable_device(pdev);
382 static void __devexit kvaser_pci_remove_one(struct pci_dev *pdev)
384 struct net_device *dev = pci_get_drvdata(pdev);
386 kvaser_pci_del_chan(dev);
388 pci_release_regions(pdev);
389 pci_disable_device(pdev);
390 pci_set_drvdata(pdev, NULL);
393 static struct pci_driver kvaser_pci_driver = {
395 .id_table = kvaser_pci_tbl,
396 .probe = kvaser_pci_init_one,
397 .remove = __devexit_p(kvaser_pci_remove_one),
400 static int __init kvaser_pci_init(void)
402 return pci_register_driver(&kvaser_pci_driver);
405 static void __exit kvaser_pci_exit(void)
407 pci_unregister_driver(&kvaser_pci_driver);
410 module_init(kvaser_pci_init);
411 module_exit(kvaser_pci_exit);