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
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, see <http://www.gnu.org/licenses/>.
32 #include <linux/kernel.h>
33 #include <linux/module.h>
34 #include <linux/interrupt.h>
35 #include <linux/netdevice.h>
36 #include <linux/delay.h>
37 #include <linux/pci.h>
38 #include <linux/can/dev.h>
43 #define DRV_NAME "kvaser_pci"
46 MODULE_DESCRIPTION("Socket-CAN driver for KVASER PCAN PCI cards");
47 MODULE_SUPPORTED_DEVICE("KVASER PCAN PCI CAN card");
48 MODULE_LICENSE("GPL v2");
50 #define MAX_NO_OF_CHANNELS 4 /* max no of channels on a single card */
54 struct pci_dev *pci_dev;
55 struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1];
56 void __iomem *conf_addr;
57 void __iomem *res_addr;
62 #define KVASER_PCI_CAN_CLOCK (16000000 / 2)
65 * The board configuration is probably following:
66 * RX1 is connected to ground.
67 * TX1 is not connected.
68 * CLKO is not connected.
69 * Setting the OCR register to 0xDA is a good idea.
70 * This means normal output mode , push-pull and the correct polarity.
72 #define KVASER_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
75 * In the CDR register, you should set CBP to 1.
76 * You will probably also want to set the clock divider value to 0
77 * (meaning divide-by-2), the Pelican bit, and the clock-off bit
78 * (you will have no need for CLKOUT anyway).
80 #define KVASER_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
83 * These register values are valid for revision 14 of the Xilinx logic.
85 #define XILINX_VERINT 7 /* Lower nibble simulate interrupts,
86 high nibble version number. */
88 #define XILINX_PRESUMED_VERSION 14
91 * Important S5920 registers
93 #define S5920_INTCSR 0x38
94 #define S5920_PTCR 0x60
95 #define INTCSR_ADDON_INTENABLE_M 0x2000
98 #define KVASER_PCI_PORT_BYTES 0x20
100 #define PCI_CONFIG_PORT_SIZE 0x80 /* size of the config io-memory */
101 #define PCI_PORT_SIZE 0x80 /* size of a channel io-memory */
102 #define PCI_PORT_XILINX_SIZE 0x08 /* size of a xilinx io-memory */
104 #define KVASER_PCI_VENDOR_ID1 0x10e8 /* the PCI device and vendor IDs */
105 #define KVASER_PCI_DEVICE_ID1 0x8406
107 #define KVASER_PCI_VENDOR_ID2 0x1a07 /* the PCI device and vendor IDs */
108 #define KVASER_PCI_DEVICE_ID2 0x0008
110 static DEFINE_PCI_DEVICE_TABLE(kvaser_pci_tbl) = {
111 {KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,},
112 {KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,},
116 MODULE_DEVICE_TABLE(pci, kvaser_pci_tbl);
118 static u8 kvaser_pci_read_reg(const struct sja1000_priv *priv, int port)
120 return ioread8(priv->reg_base + port);
123 static void kvaser_pci_write_reg(const struct sja1000_priv *priv,
126 iowrite8(val, priv->reg_base + port);
129 static void kvaser_pci_disable_irq(struct net_device *dev)
131 struct sja1000_priv *priv = netdev_priv(dev);
132 struct kvaser_pci *board = priv->priv;
135 /* Disable interrupts from card */
136 intcsr = ioread32(board->conf_addr + S5920_INTCSR);
137 intcsr &= ~INTCSR_ADDON_INTENABLE_M;
138 iowrite32(intcsr, board->conf_addr + S5920_INTCSR);
141 static void kvaser_pci_enable_irq(struct net_device *dev)
143 struct sja1000_priv *priv = netdev_priv(dev);
144 struct kvaser_pci *board = priv->priv;
147 /* Enable interrupts from card */
148 tmp_en_io = ioread32(board->conf_addr + S5920_INTCSR);
149 tmp_en_io |= INTCSR_ADDON_INTENABLE_M;
150 iowrite32(tmp_en_io, board->conf_addr + S5920_INTCSR);
153 static int number_of_sja1000_chip(void __iomem *base_addr)
158 for (i = 0; i < MAX_NO_OF_CHANNELS; i++) {
160 iowrite8(MOD_RM, base_addr +
161 (i * KVASER_PCI_PORT_BYTES) + SJA1000_MOD);
162 status = ioread8(base_addr +
163 (i * KVASER_PCI_PORT_BYTES) + SJA1000_MOD);
164 /* check reset bit */
165 if (!(status & MOD_RM))
172 static void kvaser_pci_del_chan(struct net_device *dev)
174 struct sja1000_priv *priv;
175 struct kvaser_pci *board;
180 priv = netdev_priv(dev);
185 dev_info(&board->pci_dev->dev, "Removing device %s\n",
188 /* Disable PCI interrupts */
189 kvaser_pci_disable_irq(dev);
191 for (i = 0; i < board->no_channels - 1; i++) {
192 if (board->slave_dev[i]) {
193 dev_info(&board->pci_dev->dev, "Removing device %s\n",
194 board->slave_dev[i]->name);
195 unregister_sja1000dev(board->slave_dev[i]);
196 free_sja1000dev(board->slave_dev[i]);
199 unregister_sja1000dev(dev);
201 pci_iounmap(board->pci_dev, priv->reg_base);
202 pci_iounmap(board->pci_dev, board->conf_addr);
203 pci_iounmap(board->pci_dev, board->res_addr);
205 free_sja1000dev(dev);
208 static int kvaser_pci_add_chan(struct pci_dev *pdev, int channel,
209 struct net_device **master_dev,
210 void __iomem *conf_addr,
211 void __iomem *res_addr,
212 void __iomem *base_addr)
214 struct net_device *dev;
215 struct sja1000_priv *priv;
216 struct kvaser_pci *board;
219 dev = alloc_sja1000dev(sizeof(struct kvaser_pci));
223 priv = netdev_priv(dev);
226 board->pci_dev = pdev;
227 board->channel = channel;
230 board->conf_addr = conf_addr;
232 /* XILINX board wide address */
233 board->res_addr = res_addr;
237 ioread8(board->res_addr + XILINX_VERINT) >> 4;
240 /* Assert PTADR# - we're in passive mode so the other bits are
242 iowrite32(0x80808080UL, board->conf_addr + S5920_PTCR);
244 /* Enable interrupts from card */
245 kvaser_pci_enable_irq(dev);
247 struct sja1000_priv *master_priv = netdev_priv(*master_dev);
248 struct kvaser_pci *master_board = master_priv->priv;
249 master_board->slave_dev[channel - 1] = dev;
250 master_board->no_channels = channel + 1;
251 board->xilinx_ver = master_board->xilinx_ver;
254 priv->reg_base = base_addr + channel * KVASER_PCI_PORT_BYTES;
256 priv->read_reg = kvaser_pci_read_reg;
257 priv->write_reg = kvaser_pci_write_reg;
259 priv->can.clock.freq = KVASER_PCI_CAN_CLOCK;
261 priv->ocr = KVASER_PCI_OCR;
262 priv->cdr = KVASER_PCI_CDR;
264 priv->irq_flags = IRQF_SHARED;
265 dev->irq = pdev->irq;
269 dev_info(&pdev->dev, "reg_base=%p conf_addr=%p irq=%d\n",
270 priv->reg_base, board->conf_addr, dev->irq);
272 SET_NETDEV_DEV(dev, &pdev->dev);
273 dev->dev_id = channel;
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 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,
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 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);
392 static struct pci_driver kvaser_pci_driver = {
394 .id_table = kvaser_pci_tbl,
395 .probe = kvaser_pci_init_one,
396 .remove = kvaser_pci_remove_one,
399 module_pci_driver(kvaser_pci_driver);