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21#include <linux/kernel.h>
22#include <linux/module.h>
23#include <linux/interrupt.h>
24#include <linux/netdevice.h>
25#include <linux/delay.h>
26#include <linux/pci.h>
27#include <linux/can/dev.h>
28#include <linux/io.h>
29
30#include "sja1000.h"
31
32#define DRV_NAME "kvaser_pci"
33
34MODULE_AUTHOR("Per Dalen <per.dalen@cnw.se>");
35MODULE_DESCRIPTION("Socket-CAN driver for KVASER PCAN PCI cards");
36MODULE_LICENSE("GPL v2");
37
38#define MAX_NO_OF_CHANNELS 4
39
40struct kvaser_pci {
41 int channel;
42 struct pci_dev *pci_dev;
43 struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1];
44 void __iomem *conf_addr;
45 void __iomem *res_addr;
46 int no_channels;
47 u8 xilinx_ver;
48};
49
50#define KVASER_PCI_CAN_CLOCK (16000000 / 2)
51
52
53
54
55
56
57
58
59
60#define KVASER_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
61
62
63
64
65
66
67
68#define KVASER_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
69
70
71
72
73#define XILINX_VERINT 7
74
75
76#define XILINX_PRESUMED_VERSION 14
77
78
79
80
81#define S5920_INTCSR 0x38
82#define S5920_PTCR 0x60
83#define INTCSR_ADDON_INTENABLE_M 0x2000
84
85
86#define KVASER_PCI_PORT_BYTES 0x20
87
88#define PCI_CONFIG_PORT_SIZE 0x80
89#define PCI_PORT_SIZE 0x80
90#define PCI_PORT_XILINX_SIZE 0x08
91
92#define KVASER_PCI_VENDOR_ID1 0x10e8
93#define KVASER_PCI_DEVICE_ID1 0x8406
94
95#define KVASER_PCI_VENDOR_ID2 0x1a07
96#define KVASER_PCI_DEVICE_ID2 0x0008
97
98static const struct pci_device_id kvaser_pci_tbl[] = {
99 {KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,},
100 {KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,},
101 { 0,}
102};
103
104MODULE_DEVICE_TABLE(pci, kvaser_pci_tbl);
105
106static u8 kvaser_pci_read_reg(const struct sja1000_priv *priv, int port)
107{
108 return ioread8(priv->reg_base + port);
109}
110
111static void kvaser_pci_write_reg(const struct sja1000_priv *priv,
112 int port, u8 val)
113{
114 iowrite8(val, priv->reg_base + port);
115}
116
117static void kvaser_pci_disable_irq(struct net_device *dev)
118{
119 struct sja1000_priv *priv = netdev_priv(dev);
120 struct kvaser_pci *board = priv->priv;
121 u32 intcsr;
122
123
124 intcsr = ioread32(board->conf_addr + S5920_INTCSR);
125 intcsr &= ~INTCSR_ADDON_INTENABLE_M;
126 iowrite32(intcsr, board->conf_addr + S5920_INTCSR);
127}
128
129static void kvaser_pci_enable_irq(struct net_device *dev)
130{
131 struct sja1000_priv *priv = netdev_priv(dev);
132 struct kvaser_pci *board = priv->priv;
133 u32 tmp_en_io;
134
135
136 tmp_en_io = ioread32(board->conf_addr + S5920_INTCSR);
137 tmp_en_io |= INTCSR_ADDON_INTENABLE_M;
138 iowrite32(tmp_en_io, board->conf_addr + S5920_INTCSR);
139}
140
141static int number_of_sja1000_chip(void __iomem *base_addr)
142{
143 u8 status;
144 int i;
145
146 for (i = 0; i < MAX_NO_OF_CHANNELS; i++) {
147
148 iowrite8(MOD_RM, base_addr +
149 (i * KVASER_PCI_PORT_BYTES) + SJA1000_MOD);
150 status = ioread8(base_addr +
151 (i * KVASER_PCI_PORT_BYTES) + SJA1000_MOD);
152
153 if (!(status & MOD_RM))
154 break;
155 }
156
157 return i;
158}
159
160static void kvaser_pci_del_chan(struct net_device *dev)
161{
162 struct sja1000_priv *priv;
163 struct kvaser_pci *board;
164 int i;
165
166 if (!dev)
167 return;
168 priv = netdev_priv(dev);
169 board = priv->priv;
170 if (!board)
171 return;
172
173 dev_info(&board->pci_dev->dev, "Removing device %s\n",
174 dev->name);
175
176
177 kvaser_pci_disable_irq(dev);
178
179 for (i = 0; i < board->no_channels - 1; i++) {
180 if (board->slave_dev[i]) {
181 dev_info(&board->pci_dev->dev, "Removing device %s\n",
182 board->slave_dev[i]->name);
183 unregister_sja1000dev(board->slave_dev[i]);
184 free_sja1000dev(board->slave_dev[i]);
185 }
186 }
187 unregister_sja1000dev(dev);
188
189 pci_iounmap(board->pci_dev, priv->reg_base);
190 pci_iounmap(board->pci_dev, board->conf_addr);
191 pci_iounmap(board->pci_dev, board->res_addr);
192
193 free_sja1000dev(dev);
194}
195
196static int kvaser_pci_add_chan(struct pci_dev *pdev, int channel,
197 struct net_device **master_dev,
198 void __iomem *conf_addr,
199 void __iomem *res_addr,
200 void __iomem *base_addr)
201{
202 struct net_device *dev;
203 struct sja1000_priv *priv;
204 struct kvaser_pci *board;
205 int err;
206
207 dev = alloc_sja1000dev(sizeof(struct kvaser_pci));
208 if (dev == NULL)
209 return -ENOMEM;
210
211 priv = netdev_priv(dev);
212 board = priv->priv;
213
214 board->pci_dev = pdev;
215 board->channel = channel;
216
217
218 board->conf_addr = conf_addr;
219
220
221 board->res_addr = res_addr;
222
223 if (channel == 0) {
224 board->xilinx_ver =
225 ioread8(board->res_addr + XILINX_VERINT) >> 4;
226
227
228
229 iowrite32(0x80808080UL, board->conf_addr + S5920_PTCR);
230
231
232 kvaser_pci_enable_irq(dev);
233 } else {
234 struct sja1000_priv *master_priv = netdev_priv(*master_dev);
235 struct kvaser_pci *master_board = master_priv->priv;
236 master_board->slave_dev[channel - 1] = dev;
237 master_board->no_channels = channel + 1;
238 board->xilinx_ver = master_board->xilinx_ver;
239 }
240
241 priv->reg_base = base_addr + channel * KVASER_PCI_PORT_BYTES;
242
243 priv->read_reg = kvaser_pci_read_reg;
244 priv->write_reg = kvaser_pci_write_reg;
245
246 priv->can.clock.freq = KVASER_PCI_CAN_CLOCK;
247
248 priv->ocr = KVASER_PCI_OCR;
249 priv->cdr = KVASER_PCI_CDR;
250
251 priv->irq_flags = IRQF_SHARED;
252 dev->irq = pdev->irq;
253
254 dev_info(&pdev->dev, "reg_base=%p conf_addr=%p irq=%d\n",
255 priv->reg_base, board->conf_addr, dev->irq);
256
257 SET_NETDEV_DEV(dev, &pdev->dev);
258 dev->dev_id = channel;
259
260
261 err = register_sja1000dev(dev);
262 if (err) {
263 dev_err(&pdev->dev, "Registering device failed (err=%d)\n",
264 err);
265 goto failure;
266 }
267
268 if (channel == 0)
269 *master_dev = dev;
270
271 return 0;
272
273failure:
274 kvaser_pci_del_chan(dev);
275 return err;
276}
277
278static int kvaser_pci_init_one(struct pci_dev *pdev,
279 const struct pci_device_id *ent)
280{
281 int err;
282 struct net_device *master_dev = NULL;
283 struct sja1000_priv *priv;
284 struct kvaser_pci *board;
285 int no_channels;
286 void __iomem *base_addr = NULL;
287 void __iomem *conf_addr = NULL;
288 void __iomem *res_addr = NULL;
289 int i;
290
291 dev_info(&pdev->dev, "initializing device %04x:%04x\n",
292 pdev->vendor, pdev->device);
293
294 err = pci_enable_device(pdev);
295 if (err)
296 goto failure;
297
298 err = pci_request_regions(pdev, DRV_NAME);
299 if (err)
300 goto failure_release_pci;
301
302
303 conf_addr = pci_iomap(pdev, 0, PCI_CONFIG_PORT_SIZE);
304 if (conf_addr == NULL) {
305 err = -ENODEV;
306 goto failure_release_regions;
307 }
308
309
310 res_addr = pci_iomap(pdev, 2, PCI_PORT_XILINX_SIZE);
311 if (res_addr == NULL) {
312 err = -ENOMEM;
313 goto failure_iounmap;
314 }
315
316 base_addr = pci_iomap(pdev, 1, PCI_PORT_SIZE);
317 if (base_addr == NULL) {
318 err = -ENOMEM;
319 goto failure_iounmap;
320 }
321
322 no_channels = number_of_sja1000_chip(base_addr);
323 if (no_channels == 0) {
324 err = -ENOMEM;
325 goto failure_iounmap;
326 }
327
328 for (i = 0; i < no_channels; i++) {
329 err = kvaser_pci_add_chan(pdev, i, &master_dev,
330 conf_addr, res_addr,
331 base_addr);
332 if (err)
333 goto failure_cleanup;
334 }
335
336 priv = netdev_priv(master_dev);
337 board = priv->priv;
338
339 dev_info(&pdev->dev, "xilinx version=%d number of channels=%d\n",
340 board->xilinx_ver, board->no_channels);
341
342 pci_set_drvdata(pdev, master_dev);
343 return 0;
344
345failure_cleanup:
346 kvaser_pci_del_chan(master_dev);
347
348failure_iounmap:
349 if (conf_addr != NULL)
350 pci_iounmap(pdev, conf_addr);
351 if (res_addr != NULL)
352 pci_iounmap(pdev, res_addr);
353 if (base_addr != NULL)
354 pci_iounmap(pdev, base_addr);
355
356failure_release_regions:
357 pci_release_regions(pdev);
358
359failure_release_pci:
360 pci_disable_device(pdev);
361
362failure:
363 return err;
364
365}
366
367static void kvaser_pci_remove_one(struct pci_dev *pdev)
368{
369 struct net_device *dev = pci_get_drvdata(pdev);
370
371 kvaser_pci_del_chan(dev);
372
373 pci_release_regions(pdev);
374 pci_disable_device(pdev);
375}
376
377static struct pci_driver kvaser_pci_driver = {
378 .name = DRV_NAME,
379 .id_table = kvaser_pci_tbl,
380 .probe = kvaser_pci_init_one,
381 .remove = kvaser_pci_remove_one,
382};
383
384module_pci_driver(kvaser_pci_driver);
385
