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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_SUPPORTED_DEVICE("KVASER PCAN PCI CAN card");
37MODULE_LICENSE("GPL v2");
38
39#define MAX_NO_OF_CHANNELS 4
40
41struct kvaser_pci {
42 int channel;
43 struct pci_dev *pci_dev;
44 struct net_device *slave_dev[MAX_NO_OF_CHANNELS-1];
45 void __iomem *conf_addr;
46 void __iomem *res_addr;
47 int no_channels;
48 u8 xilinx_ver;
49};
50
51#define KVASER_PCI_CAN_CLOCK (16000000 / 2)
52
53
54
55
56
57
58
59
60
61#define KVASER_PCI_OCR (OCR_TX0_PUSHPULL | OCR_TX1_PUSHPULL)
62
63
64
65
66
67
68
69#define KVASER_PCI_CDR (CDR_CBP | CDR_CLKOUT_MASK)
70
71
72
73
74#define XILINX_VERINT 7
75
76
77#define XILINX_PRESUMED_VERSION 14
78
79
80
81
82#define S5920_INTCSR 0x38
83#define S5920_PTCR 0x60
84#define INTCSR_ADDON_INTENABLE_M 0x2000
85
86
87#define KVASER_PCI_PORT_BYTES 0x20
88
89#define PCI_CONFIG_PORT_SIZE 0x80
90#define PCI_PORT_SIZE 0x80
91#define PCI_PORT_XILINX_SIZE 0x08
92
93#define KVASER_PCI_VENDOR_ID1 0x10e8
94#define KVASER_PCI_DEVICE_ID1 0x8406
95
96#define KVASER_PCI_VENDOR_ID2 0x1a07
97#define KVASER_PCI_DEVICE_ID2 0x0008
98
99static const struct pci_device_id kvaser_pci_tbl[] = {
100 {KVASER_PCI_VENDOR_ID1, KVASER_PCI_DEVICE_ID1, PCI_ANY_ID, PCI_ANY_ID,},
101 {KVASER_PCI_VENDOR_ID2, KVASER_PCI_DEVICE_ID2, PCI_ANY_ID, PCI_ANY_ID,},
102 { 0,}
103};
104
105MODULE_DEVICE_TABLE(pci, kvaser_pci_tbl);
106
107static u8 kvaser_pci_read_reg(const struct sja1000_priv *priv, int port)
108{
109 return ioread8(priv->reg_base + port);
110}
111
112static void kvaser_pci_write_reg(const struct sja1000_priv *priv,
113 int port, u8 val)
114{
115 iowrite8(val, priv->reg_base + port);
116}
117
118static void kvaser_pci_disable_irq(struct net_device *dev)
119{
120 struct sja1000_priv *priv = netdev_priv(dev);
121 struct kvaser_pci *board = priv->priv;
122 u32 intcsr;
123
124
125 intcsr = ioread32(board->conf_addr + S5920_INTCSR);
126 intcsr &= ~INTCSR_ADDON_INTENABLE_M;
127 iowrite32(intcsr, board->conf_addr + S5920_INTCSR);
128}
129
130static void kvaser_pci_enable_irq(struct net_device *dev)
131{
132 struct sja1000_priv *priv = netdev_priv(dev);
133 struct kvaser_pci *board = priv->priv;
134 u32 tmp_en_io;
135
136
137 tmp_en_io = ioread32(board->conf_addr + S5920_INTCSR);
138 tmp_en_io |= INTCSR_ADDON_INTENABLE_M;
139 iowrite32(tmp_en_io, board->conf_addr + S5920_INTCSR);
140}
141
142static int number_of_sja1000_chip(void __iomem *base_addr)
143{
144 u8 status;
145 int i;
146
147 for (i = 0; i < MAX_NO_OF_CHANNELS; i++) {
148
149 iowrite8(MOD_RM, base_addr +
150 (i * KVASER_PCI_PORT_BYTES) + SJA1000_MOD);
151 status = ioread8(base_addr +
152 (i * KVASER_PCI_PORT_BYTES) + SJA1000_MOD);
153
154 if (!(status & MOD_RM))
155 break;
156 }
157
158 return i;
159}
160
161static void kvaser_pci_del_chan(struct net_device *dev)
162{
163 struct sja1000_priv *priv;
164 struct kvaser_pci *board;
165 int i;
166
167 if (!dev)
168 return;
169 priv = netdev_priv(dev);
170 board = priv->priv;
171 if (!board)
172 return;
173
174 dev_info(&board->pci_dev->dev, "Removing device %s\n",
175 dev->name);
176
177
178 kvaser_pci_disable_irq(dev);
179
180 for (i = 0; i < board->no_channels - 1; i++) {
181 if (board->slave_dev[i]) {
182 dev_info(&board->pci_dev->dev, "Removing device %s\n",
183 board->slave_dev[i]->name);
184 unregister_sja1000dev(board->slave_dev[i]);
185 free_sja1000dev(board->slave_dev[i]);
186 }
187 }
188 unregister_sja1000dev(dev);
189
190 pci_iounmap(board->pci_dev, priv->reg_base);
191 pci_iounmap(board->pci_dev, board->conf_addr);
192 pci_iounmap(board->pci_dev, board->res_addr);
193
194 free_sja1000dev(dev);
195}
196
197static int kvaser_pci_add_chan(struct pci_dev *pdev, int channel,
198 struct net_device **master_dev,
199 void __iomem *conf_addr,
200 void __iomem *res_addr,
201 void __iomem *base_addr)
202{
203 struct net_device *dev;
204 struct sja1000_priv *priv;
205 struct kvaser_pci *board;
206 int err;
207
208 dev = alloc_sja1000dev(sizeof(struct kvaser_pci));
209 if (dev == NULL)
210 return -ENOMEM;
211
212 priv = netdev_priv(dev);
213 board = priv->priv;
214
215 board->pci_dev = pdev;
216 board->channel = channel;
217
218
219 board->conf_addr = conf_addr;
220
221
222 board->res_addr = res_addr;
223
224 if (channel == 0) {
225 board->xilinx_ver =
226 ioread8(board->res_addr + XILINX_VERINT) >> 4;
227
228
229
230 iowrite32(0x80808080UL, board->conf_addr + S5920_PTCR);
231
232
233 kvaser_pci_enable_irq(dev);
234 } else {
235 struct sja1000_priv *master_priv = netdev_priv(*master_dev);
236 struct kvaser_pci *master_board = master_priv->priv;
237 master_board->slave_dev[channel - 1] = dev;
238 master_board->no_channels = channel + 1;
239 board->xilinx_ver = master_board->xilinx_ver;
240 }
241
242 priv->reg_base = base_addr + channel * KVASER_PCI_PORT_BYTES;
243
244 priv->read_reg = kvaser_pci_read_reg;
245 priv->write_reg = kvaser_pci_write_reg;
246
247 priv->can.clock.freq = KVASER_PCI_CAN_CLOCK;
248
249 priv->ocr = KVASER_PCI_OCR;
250 priv->cdr = KVASER_PCI_CDR;
251
252 priv->irq_flags = IRQF_SHARED;
253 dev->irq = pdev->irq;
254
255 dev_info(&pdev->dev, "reg_base=%p conf_addr=%p irq=%d\n",
256 priv->reg_base, board->conf_addr, dev->irq);
257
258 SET_NETDEV_DEV(dev, &pdev->dev);
259 dev->dev_id = channel;
260
261
262 err = register_sja1000dev(dev);
263 if (err) {
264 dev_err(&pdev->dev, "Registering device failed (err=%d)\n",
265 err);
266 goto failure;
267 }
268
269 if (channel == 0)
270 *master_dev = dev;
271
272 return 0;
273
274failure:
275 kvaser_pci_del_chan(dev);
276 return err;
277}
278
279static int kvaser_pci_init_one(struct pci_dev *pdev,
280 const struct pci_device_id *ent)
281{
282 int err;
283 struct net_device *master_dev = NULL;
284 struct sja1000_priv *priv;
285 struct kvaser_pci *board;
286 int no_channels;
287 void __iomem *base_addr = NULL;
288 void __iomem *conf_addr = NULL;
289 void __iomem *res_addr = NULL;
290 int i;
291
292 dev_info(&pdev->dev, "initializing device %04x:%04x\n",
293 pdev->vendor, pdev->device);
294
295 err = pci_enable_device(pdev);
296 if (err)
297 goto failure;
298
299 err = pci_request_regions(pdev, DRV_NAME);
300 if (err)
301 goto failure_release_pci;
302
303
304 conf_addr = pci_iomap(pdev, 0, PCI_CONFIG_PORT_SIZE);
305 if (conf_addr == NULL) {
306 err = -ENODEV;
307 goto failure_release_regions;
308 }
309
310
311 res_addr = pci_iomap(pdev, 2, PCI_PORT_XILINX_SIZE);
312 if (res_addr == NULL) {
313 err = -ENOMEM;
314 goto failure_iounmap;
315 }
316
317 base_addr = pci_iomap(pdev, 1, PCI_PORT_SIZE);
318 if (base_addr == NULL) {
319 err = -ENOMEM;
320 goto failure_iounmap;
321 }
322
323 no_channels = number_of_sja1000_chip(base_addr);
324 if (no_channels == 0) {
325 err = -ENOMEM;
326 goto failure_iounmap;
327 }
328
329 for (i = 0; i < no_channels; i++) {
330 err = kvaser_pci_add_chan(pdev, i, &master_dev,
331 conf_addr, res_addr,
332 base_addr);
333 if (err)
334 goto failure_cleanup;
335 }
336
337 priv = netdev_priv(master_dev);
338 board = priv->priv;
339
340 dev_info(&pdev->dev, "xilinx version=%d number of channels=%d\n",
341 board->xilinx_ver, board->no_channels);
342
343 pci_set_drvdata(pdev, master_dev);
344 return 0;
345
346failure_cleanup:
347 kvaser_pci_del_chan(master_dev);
348
349failure_iounmap:
350 if (conf_addr != NULL)
351 pci_iounmap(pdev, conf_addr);
352 if (res_addr != NULL)
353 pci_iounmap(pdev, res_addr);
354 if (base_addr != NULL)
355 pci_iounmap(pdev, base_addr);
356
357failure_release_regions:
358 pci_release_regions(pdev);
359
360failure_release_pci:
361 pci_disable_device(pdev);
362
363failure:
364 return err;
365
366}
367
368static void kvaser_pci_remove_one(struct pci_dev *pdev)
369{
370 struct net_device *dev = pci_get_drvdata(pdev);
371
372 kvaser_pci_del_chan(dev);
373
374 pci_release_regions(pdev);
375 pci_disable_device(pdev);
376}
377
378static struct pci_driver kvaser_pci_driver = {
379 .name = DRV_NAME,
380 .id_table = kvaser_pci_tbl,
381 .probe = kvaser_pci_init_one,
382 .remove = kvaser_pci_remove_one,
383};
384
385module_pci_driver(kvaser_pci_driver);
386
