tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
can: add driver for Softing card
This patch adds a driver for the platform:softing device.
This will create (up to) 2 CAN network devices from 1
platform:softing device
Signed-off-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
authored by
Kurt Van Dijck
and committed by
David S. Miller
03fd3cf5
2221eca0
+1815
+2
drivers/net/can/Kconfig
+2
drivers/net/can/Kconfig
+1
drivers/net/can/Makefile
+1
drivers/net/can/Makefile
+16
drivers/net/can/softing/Kconfig
+16
drivers/net/can/softing/Kconfig
···
1
+
config CAN_SOFTING
2
+
tristate "Softing Gmbh CAN generic support"
3
+
depends on CAN_DEV
4
+
---help---
5
+
Support for CAN cards from Softing Gmbh & some cards
6
+
from Vector Gmbh.
7
+
Softing Gmbh CAN cards come with 1 or 2 physical busses.
8
+
Those cards typically use Dual Port RAM to communicate
9
+
with the host CPU. The interface is then identical for PCI
10
+
and PCMCIA cards. This driver operates on a platform device,
11
+
which has been created by softing_cs or softing_pci driver.
12
+
Warning:
13
+
The API of the card does not allow fine control per bus, but
14
+
controls the 2 busses on the card together.
15
+
As such, some actions (start/stop/busoff recovery) on 1 bus
16
+
must bring down the other bus too temporarily.
+5
drivers/net/can/softing/Makefile
+5
drivers/net/can/softing/Makefile
+167
drivers/net/can/softing/softing.h
+167
drivers/net/can/softing/softing.h
···
1
+
/*
2
+
* softing common interfaces
3
+
*
4
+
* by Kurt Van Dijck, 2008-2010
5
+
*/
6
+
7
+
#include <linux/atomic.h>
8
+
#include <linux/netdevice.h>
9
+
#include <linux/ktime.h>
10
+
#include <linux/mutex.h>
11
+
#include <linux/spinlock.h>
12
+
#include <linux/can.h>
13
+
#include <linux/can/dev.h>
14
+
15
+
#include "softing_platform.h"
16
+
17
+
struct softing;
18
+
19
+
struct softing_priv {
20
+
struct can_priv can; /* must be the first member! */
21
+
struct net_device *netdev;
22
+
struct softing *card;
23
+
struct {
24
+
int pending;
25
+
/* variables wich hold the circular buffer */
26
+
int echo_put;
27
+
int echo_get;
28
+
} tx;
29
+
struct can_bittiming_const btr_const;
30
+
int index;
31
+
uint8_t output;
32
+
uint16_t chip;
33
+
};
34
+
#define netdev2softing(netdev) ((struct softing_priv *)netdev_priv(netdev))
35
+
36
+
struct softing {
37
+
const struct softing_platform_data *pdat;
38
+
struct platform_device *pdev;
39
+
struct net_device *net[2];
40
+
spinlock_t spin; /* protect this structure & DPRAM access */
41
+
ktime_t ts_ref;
42
+
ktime_t ts_overflow; /* timestamp overflow value, in ktime */
43
+
44
+
struct {
45
+
/* indication of firmware status */
46
+
int up;
47
+
/* protection of the 'up' variable */
48
+
struct mutex lock;
49
+
} fw;
50
+
struct {
51
+
int nr;
52
+
int requested;
53
+
int svc_count;
54
+
unsigned int dpram_position;
55
+
} irq;
56
+
struct {
57
+
int pending;
58
+
int last_bus;
59
+
/*
60
+
* keep the bus that last tx'd a message,
61
+
* in order to let every netdev queue resume
62
+
*/
63
+
} tx;
64
+
__iomem uint8_t *dpram;
65
+
unsigned long dpram_phys;
66
+
unsigned long dpram_size;
67
+
struct {
68
+
uint16_t fw_version, hw_version, license, serial;
69
+
uint16_t chip[2];
70
+
unsigned int freq; /* remote cpu's operating frequency */
71
+
} id;
72
+
};
73
+
74
+
extern int softing_default_output(struct net_device *netdev);
75
+
76
+
extern ktime_t softing_raw2ktime(struct softing *card, u32 raw);
77
+
78
+
extern int softing_chip_poweron(struct softing *card);
79
+
80
+
extern int softing_bootloader_command(struct softing *card, int16_t cmd,
81
+
const char *msg);
82
+
83
+
/* Load firmware after reset */
84
+
extern int softing_load_fw(const char *file, struct softing *card,
85
+
__iomem uint8_t *virt, unsigned int size, int offset);
86
+
87
+
/* Load final application firmware after bootloader */
88
+
extern int softing_load_app_fw(const char *file, struct softing *card);
89
+
90
+
/*
91
+
* enable or disable irq
92
+
* only called with fw.lock locked
93
+
*/
94
+
extern int softing_enable_irq(struct softing *card, int enable);
95
+
96
+
/* start/stop 1 bus on card */
97
+
extern int softing_startstop(struct net_device *netdev, int up);
98
+
99
+
/* netif_rx() */
100
+
extern int softing_netdev_rx(struct net_device *netdev,
101
+
const struct can_frame *msg, ktime_t ktime);
102
+
103
+
/* SOFTING DPRAM mappings */
104
+
#define DPRAM_RX 0x0000
105
+
#define DPRAM_RX_SIZE 32
106
+
#define DPRAM_RX_CNT 16
107
+
#define DPRAM_RX_RD 0x0201 /* uint8_t */
108
+
#define DPRAM_RX_WR 0x0205 /* uint8_t */
109
+
#define DPRAM_RX_LOST 0x0207 /* uint8_t */
110
+
111
+
#define DPRAM_FCT_PARAM 0x0300 /* int16_t [20] */
112
+
#define DPRAM_FCT_RESULT 0x0328 /* int16_t */
113
+
#define DPRAM_FCT_HOST 0x032b /* uint16_t */
114
+
115
+
#define DPRAM_INFO_BUSSTATE 0x0331 /* uint16_t */
116
+
#define DPRAM_INFO_BUSSTATE2 0x0335 /* uint16_t */
117
+
#define DPRAM_INFO_ERRSTATE 0x0339 /* uint16_t */
118
+
#define DPRAM_INFO_ERRSTATE2 0x033d /* uint16_t */
119
+
#define DPRAM_RESET 0x0341 /* uint16_t */
120
+
#define DPRAM_CLR_RECV_FIFO 0x0345 /* uint16_t */
121
+
#define DPRAM_RESET_TIME 0x034d /* uint16_t */
122
+
#define DPRAM_TIME 0x0350 /* uint64_t */
123
+
#define DPRAM_WR_START 0x0358 /* uint8_t */
124
+
#define DPRAM_WR_END 0x0359 /* uint8_t */
125
+
#define DPRAM_RESET_RX_FIFO 0x0361 /* uint16_t */
126
+
#define DPRAM_RESET_TX_FIFO 0x0364 /* uint8_t */
127
+
#define DPRAM_READ_FIFO_LEVEL 0x0365 /* uint8_t */
128
+
#define DPRAM_RX_FIFO_LEVEL 0x0366 /* uint16_t */
129
+
#define DPRAM_TX_FIFO_LEVEL 0x0366 /* uint16_t */
130
+
131
+
#define DPRAM_TX 0x0400 /* uint16_t */
132
+
#define DPRAM_TX_SIZE 16
133
+
#define DPRAM_TX_CNT 32
134
+
#define DPRAM_TX_RD 0x0601 /* uint8_t */
135
+
#define DPRAM_TX_WR 0x0605 /* uint8_t */
136
+
137
+
#define DPRAM_COMMAND 0x07e0 /* uint16_t */
138
+
#define DPRAM_RECEIPT 0x07f0 /* uint16_t */
139
+
#define DPRAM_IRQ_TOHOST 0x07fe /* uint8_t */
140
+
#define DPRAM_IRQ_TOCARD 0x07ff /* uint8_t */
141
+
142
+
#define DPRAM_V2_RESET 0x0e00 /* uint8_t */
143
+
#define DPRAM_V2_IRQ_TOHOST 0x0e02 /* uint8_t */
144
+
145
+
#define TXMAX (DPRAM_TX_CNT - 1)
146
+
147
+
/* DPRAM return codes */
148
+
#define RES_NONE 0
149
+
#define RES_OK 1
150
+
#define RES_NOK 2
151
+
#define RES_UNKNOWN 3
152
+
/* DPRAM flags */
153
+
#define CMD_TX 0x01
154
+
#define CMD_ACK 0x02
155
+
#define CMD_XTD 0x04
156
+
#define CMD_RTR 0x08
157
+
#define CMD_ERR 0x10
158
+
#define CMD_BUS2 0x80
159
+
160
+
/* returned fifo entry bus state masks */
161
+
#define SF_MASK_BUSOFF 0x80
162
+
#define SF_MASK_EPASSIVE 0x60
163
+
164
+
/* bus states */
165
+
#define STATE_BUSOFF 2
166
+
#define STATE_EPASSIVE 1
167
+
#define STATE_EACTIVE 0
+691
drivers/net/can/softing/softing_fw.c
+691
drivers/net/can/softing/softing_fw.c
···
1
+
/*
2
+
* Copyright (C) 2008-2010
3
+
*
4
+
* - Kurt Van Dijck, EIA Electronics
5
+
*
6
+
* This program is free software; you can redistribute it and/or modify
7
+
* it under the terms of the version 2 of the GNU General Public License
8
+
* as published by the Free Software Foundation
9
+
*
10
+
* This program is distributed in the hope that it will be useful,
11
+
* but WITHOUT ANY WARRANTY; without even the implied warranty of
12
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
+
* GNU General Public License for more details.
14
+
*
15
+
* You should have received a copy of the GNU General Public License
16
+
* along with this program; if not, write to the Free Software
17
+
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
+
*/
19
+
20
+
#include <linux/firmware.h>
21
+
#include <linux/sched.h>
22
+
#include <asm/div64.h>
23
+
24
+
#include "softing.h"
25
+
26
+
/*
27
+
* low level DPRAM command.
28
+
* Make sure that card->dpram[DPRAM_FCT_HOST] is preset
29
+
*/
30
+
static int _softing_fct_cmd(struct softing *card, int16_t cmd, uint16_t vector,
31
+
const char *msg)
32
+
{
33
+
int ret;
34
+
unsigned long stamp;
35
+
36
+
iowrite16(cmd, &card->dpram[DPRAM_FCT_PARAM]);
37
+
iowrite8(vector >> 8, &card->dpram[DPRAM_FCT_HOST + 1]);
38
+
iowrite8(vector, &card->dpram[DPRAM_FCT_HOST]);
39
+
/* be sure to flush this to the card */
40
+
wmb();
41
+
stamp = jiffies + 1 * HZ;
42
+
/* wait for card */
43
+
do {
44
+
/* DPRAM_FCT_HOST is _not_ aligned */
45
+
ret = ioread8(&card->dpram[DPRAM_FCT_HOST]) +
46
+
(ioread8(&card->dpram[DPRAM_FCT_HOST + 1]) << 8);
47
+
/* don't have any cached variables */
48
+
rmb();
49
+
if (ret == RES_OK)
50
+
/* read return-value now */
51
+
return ioread16(&card->dpram[DPRAM_FCT_RESULT]);
52
+
53
+
if ((ret != vector) || time_after(jiffies, stamp))
54
+
break;
55
+
/* process context => relax */
56
+
usleep_range(500, 10000);
57
+
} while (1);
58
+
59
+
ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
60
+
dev_alert(&card->pdev->dev, "firmware %s failed (%i)\n", msg, ret);
61
+
return ret;
62
+
}
63
+
64
+
static int softing_fct_cmd(struct softing *card, int16_t cmd, const char *msg)
65
+
{
66
+
int ret;
67
+
68
+
ret = _softing_fct_cmd(card, cmd, 0, msg);
69
+
if (ret > 0) {
70
+
dev_alert(&card->pdev->dev, "%s returned %u\n", msg, ret);
71
+
ret = -EIO;
72
+
}
73
+
return ret;
74
+
}
75
+
76
+
int softing_bootloader_command(struct softing *card, int16_t cmd,
77
+
const char *msg)
78
+
{
79
+
int ret;
80
+
unsigned long stamp;
81
+
82
+
iowrite16(RES_NONE, &card->dpram[DPRAM_RECEIPT]);
83
+
iowrite16(cmd, &card->dpram[DPRAM_COMMAND]);
84
+
/* be sure to flush this to the card */
85
+
wmb();
86
+
stamp = jiffies + 3 * HZ;
87
+
/* wait for card */
88
+
do {
89
+
ret = ioread16(&card->dpram[DPRAM_RECEIPT]);
90
+
/* don't have any cached variables */
91
+
rmb();
92
+
if (ret == RES_OK)
93
+
return 0;
94
+
if (time_after(jiffies, stamp))
95
+
break;
96
+
/* process context => relax */
97
+
usleep_range(500, 10000);
98
+
} while (!signal_pending(current));
99
+
100
+
ret = (ret == RES_NONE) ? -ETIMEDOUT : -ECANCELED;
101
+
dev_alert(&card->pdev->dev, "bootloader %s failed (%i)\n", msg, ret);
102
+
return ret;
103
+
}
104
+
105
+
static int fw_parse(const uint8_t **pmem, uint16_t *ptype, uint32_t *paddr,
106
+
uint16_t *plen, const uint8_t **pdat)
107
+
{
108
+
uint16_t checksum[2];
109
+
const uint8_t *mem;
110
+
const uint8_t *end;
111
+
112
+
/*
113
+
* firmware records are a binary, unaligned stream composed of:
114
+
* uint16_t type;
115
+
* uint32_t addr;
116
+
* uint16_t len;
117
+
* uint8_t dat[len];
118
+
* uint16_t checksum;
119
+
* all values in little endian.
120
+
* We could define a struct for this, with __attribute__((packed)),
121
+
* but would that solve the alignment in _all_ cases (cfr. the
122
+
* struct itself may be an odd address)?
123
+
*
124
+
* I chose to use leXX_to_cpup() since this solves both
125
+
* endianness & alignment.
126
+
*/
127
+
mem = *pmem;
128
+
*ptype = le16_to_cpup((void *)&mem[0]);
129
+
*paddr = le32_to_cpup((void *)&mem[2]);
130
+
*plen = le16_to_cpup((void *)&mem[6]);
131
+
*pdat = &mem[8];
132
+
/* verify checksum */
133
+
end = &mem[8 + *plen];
134
+
checksum[0] = le16_to_cpup((void *)end);
135
+
for (checksum[1] = 0; mem < end; ++mem)
136
+
checksum[1] += *mem;
137
+
if (checksum[0] != checksum[1])
138
+
return -EINVAL;
139
+
/* increment */
140
+
*pmem += 10 + *plen;
141
+
return 0;
142
+
}
143
+
144
+
int softing_load_fw(const char *file, struct softing *card,
145
+
__iomem uint8_t *dpram, unsigned int size, int offset)
146
+
{
147
+
const struct firmware *fw;
148
+
int ret;
149
+
const uint8_t *mem, *end, *dat;
150
+
uint16_t type, len;
151
+
uint32_t addr;
152
+
uint8_t *buf = NULL;
153
+
int buflen = 0;
154
+
int8_t type_end = 0;
155
+
156
+
ret = request_firmware(&fw, file, &card->pdev->dev);
157
+
if (ret < 0)
158
+
return ret;
159
+
dev_dbg(&card->pdev->dev, "%s, firmware(%s) got %u bytes"
160
+
", offset %c0x%04x\n",
161
+
card->pdat->name, file, (unsigned int)fw->size,
162
+
(offset >= 0) ? '+' : '-', (unsigned int)abs(offset));
163
+
/* parse the firmware */
164
+
mem = fw->data;
165
+
end = &mem[fw->size];
166
+
/* look for header record */
167
+
ret = fw_parse(&mem, &type, &addr, &len, &dat);
168
+
if (ret < 0)
169
+
goto failed;
170
+
if (type != 0xffff)
171
+
goto failed;
172
+
if (strncmp("Structured Binary Format, Softing GmbH" , dat, len)) {
173
+
ret = -EINVAL;
174
+
goto failed;
175
+
}
176
+
/* ok, we had a header */
177
+
while (mem < end) {
178
+
ret = fw_parse(&mem, &type, &addr, &len, &dat);
179
+
if (ret < 0)
180
+
goto failed;
181
+
if (type == 3) {
182
+
/* start address, not used here */
183
+
continue;
184
+
} else if (type == 1) {
185
+
/* eof */
186
+
type_end = 1;
187
+
break;
188
+
} else if (type != 0) {
189
+
ret = -EINVAL;
190
+
goto failed;
191
+
}
192
+
193
+
if ((addr + len + offset) > size)
194
+
goto failed;
195
+
memcpy_toio(&dpram[addr + offset], dat, len);
196
+
/* be sure to flush caches from IO space */
197
+
mb();
198
+
if (len > buflen) {
199
+
/* align buflen */
200
+
buflen = (len + (1024-1)) & ~(1024-1);
201
+
buf = krealloc(buf, buflen, GFP_KERNEL);
202
+
if (!buf) {
203
+
ret = -ENOMEM;
204
+
goto failed;
205
+
}
206
+
}
207
+
/* verify record data */
208
+
memcpy_fromio(buf, &dpram[addr + offset], len);
209
+
if (memcmp(buf, dat, len)) {
210
+
/* is not ok */
211
+
dev_alert(&card->pdev->dev, "DPRAM readback failed\n");
212
+
ret = -EIO;
213
+
goto failed;
214
+
}
215
+
}
216
+
if (!type_end)
217
+
/* no end record seen */
218
+
goto failed;
219
+
ret = 0;
220
+
failed:
221
+
kfree(buf);
222
+
release_firmware(fw);
223
+
if (ret < 0)
224
+
dev_info(&card->pdev->dev, "firmware %s failed\n", file);
225
+
return ret;
226
+
}
227
+
228
+
int softing_load_app_fw(const char *file, struct softing *card)
229
+
{
230
+
const struct firmware *fw;
231
+
const uint8_t *mem, *end, *dat;
232
+
int ret, j;
233
+
uint16_t type, len;
234
+
uint32_t addr, start_addr = 0;
235
+
unsigned int sum, rx_sum;
236
+
int8_t type_end = 0, type_entrypoint = 0;
237
+
238
+
ret = request_firmware(&fw, file, &card->pdev->dev);
239
+
if (ret) {
240
+
dev_alert(&card->pdev->dev, "request_firmware(%s) got %i\n",
241
+
file, ret);
242
+
return ret;
243
+
}
244
+
dev_dbg(&card->pdev->dev, "firmware(%s) got %lu bytes\n",
245
+
file, (unsigned long)fw->size);
246
+
/* parse the firmware */
247
+
mem = fw->data;
248
+
end = &mem[fw->size];
249
+
/* look for header record */
250
+
ret = fw_parse(&mem, &type, &addr, &len, &dat);
251
+
if (ret)
252
+
goto failed;
253
+
ret = -EINVAL;
254
+
if (type != 0xffff) {
255
+
dev_alert(&card->pdev->dev, "firmware starts with type 0x%x\n",
256
+
type);
257
+
goto failed;
258
+
}
259
+
if (strncmp("Structured Binary Format, Softing GmbH", dat, len)) {
260
+
dev_alert(&card->pdev->dev, "firmware string '%.*s' fault\n",
261
+
len, dat);
262
+
goto failed;
263
+
}
264
+
/* ok, we had a header */
265
+
while (mem < end) {
266
+
ret = fw_parse(&mem, &type, &addr, &len, &dat);
267
+
if (ret)
268
+
goto failed;
269
+
270
+
if (type == 3) {
271
+
/* start address */
272
+
start_addr = addr;
273
+
type_entrypoint = 1;
274
+
continue;
275
+
} else if (type == 1) {
276
+
/* eof */
277
+
type_end = 1;
278
+
break;
279
+
} else if (type != 0) {
280
+
dev_alert(&card->pdev->dev,
281
+
"unknown record type 0x%04x\n", type);
282
+
ret = -EINVAL;
283
+
goto failed;
284
+
}
285
+
286
+
/* regualar data */
287
+
for (sum = 0, j = 0; j < len; ++j)
288
+
sum += dat[j];
289
+
/* work in 16bit (target) */
290
+
sum &= 0xffff;
291
+
292
+
memcpy_toio(&card->dpram[card->pdat->app.offs], dat, len);
293
+
iowrite32(card->pdat->app.offs + card->pdat->app.addr,
294
+
&card->dpram[DPRAM_COMMAND + 2]);
295
+
iowrite32(addr, &card->dpram[DPRAM_COMMAND + 6]);
296
+
iowrite16(len, &card->dpram[DPRAM_COMMAND + 10]);
297
+
iowrite8(1, &card->dpram[DPRAM_COMMAND + 12]);
298
+
ret = softing_bootloader_command(card, 1, "loading app.");
299
+
if (ret < 0)
300
+
goto failed;
301
+
/* verify checksum */
302
+
rx_sum = ioread16(&card->dpram[DPRAM_RECEIPT + 2]);
303
+
if (rx_sum != sum) {
304
+
dev_alert(&card->pdev->dev, "SRAM seems to be damaged"
305
+
", wanted 0x%04x, got 0x%04x\n", sum, rx_sum);
306
+
ret = -EIO;
307
+
goto failed;
308
+
}
309
+
}
310
+
if (!type_end || !type_entrypoint)
311
+
goto failed;
312
+
/* start application in card */
313
+
iowrite32(start_addr, &card->dpram[DPRAM_COMMAND + 2]);
314
+
iowrite8(1, &card->dpram[DPRAM_COMMAND + 6]);
315
+
ret = softing_bootloader_command(card, 3, "start app.");
316
+
if (ret < 0)
317
+
goto failed;
318
+
ret = 0;
319
+
failed:
320
+
release_firmware(fw);
321
+
if (ret < 0)
322
+
dev_info(&card->pdev->dev, "firmware %s failed\n", file);
323
+
return ret;
324
+
}
325
+
326
+
static int softing_reset_chip(struct softing *card)
327
+
{
328
+
int ret;
329
+
330
+
do {
331
+
/* reset chip */
332
+
iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO]);
333
+
iowrite8(0, &card->dpram[DPRAM_RESET_RX_FIFO+1]);
334
+
iowrite8(1, &card->dpram[DPRAM_RESET]);
335
+
iowrite8(0, &card->dpram[DPRAM_RESET+1]);
336
+
337
+
ret = softing_fct_cmd(card, 0, "reset_can");
338
+
if (!ret)
339
+
break;
340
+
if (signal_pending(current))
341
+
/* don't wait any longer */
342
+
break;
343
+
} while (1);
344
+
card->tx.pending = 0;
345
+
return ret;
346
+
}
347
+
348
+
int softing_chip_poweron(struct softing *card)
349
+
{
350
+
int ret;
351
+
/* sync */
352
+
ret = _softing_fct_cmd(card, 99, 0x55, "sync-a");
353
+
if (ret < 0)
354
+
goto failed;
355
+
356
+
ret = _softing_fct_cmd(card, 99, 0xaa, "sync-b");
357
+
if (ret < 0)
358
+
goto failed;
359
+
360
+
ret = softing_reset_chip(card);
361
+
if (ret < 0)
362
+
goto failed;
363
+
/* get_serial */
364
+
ret = softing_fct_cmd(card, 43, "get_serial_number");
365
+
if (ret < 0)
366
+
goto failed;
367
+
card->id.serial = ioread32(&card->dpram[DPRAM_FCT_PARAM]);
368
+
/* get_version */
369
+
ret = softing_fct_cmd(card, 12, "get_version");
370
+
if (ret < 0)
371
+
goto failed;
372
+
card->id.fw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 2]);
373
+
card->id.hw_version = ioread16(&card->dpram[DPRAM_FCT_PARAM + 4]);
374
+
card->id.license = ioread16(&card->dpram[DPRAM_FCT_PARAM + 6]);
375
+
card->id.chip[0] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 8]);
376
+
card->id.chip[1] = ioread16(&card->dpram[DPRAM_FCT_PARAM + 10]);
377
+
return 0;
378
+
failed:
379
+
return ret;
380
+
}
381
+
382
+
static void softing_initialize_timestamp(struct softing *card)
383
+
{
384
+
uint64_t ovf;
385
+
386
+
card->ts_ref = ktime_get();
387
+
388
+
/* 16MHz is the reference */
389
+
ovf = 0x100000000ULL * 16;
390
+
do_div(ovf, card->pdat->freq ?: 16);
391
+
392
+
card->ts_overflow = ktime_add_us(ktime_set(0, 0), ovf);
393
+
}
394
+
395
+
ktime_t softing_raw2ktime(struct softing *card, u32 raw)
396
+
{
397
+
uint64_t rawl;
398
+
ktime_t now, real_offset;
399
+
ktime_t target;
400
+
ktime_t tmp;
401
+
402
+
now = ktime_get();
403
+
real_offset = ktime_sub(ktime_get_real(), now);
404
+
405
+
/* find nsec from card */
406
+
rawl = raw * 16;
407
+
do_div(rawl, card->pdat->freq ?: 16);
408
+
target = ktime_add_us(card->ts_ref, rawl);
409
+
/* test for overflows */
410
+
tmp = ktime_add(target, card->ts_overflow);
411
+
while (unlikely(ktime_to_ns(tmp) > ktime_to_ns(now))) {
412
+
card->ts_ref = ktime_add(card->ts_ref, card->ts_overflow);
413
+
target = tmp;
414
+
tmp = ktime_add(target, card->ts_overflow);
415
+
}
416
+
return ktime_add(target, real_offset);
417
+
}
418
+
419
+
static inline int softing_error_reporting(struct net_device *netdev)
420
+
{
421
+
struct softing_priv *priv = netdev_priv(netdev);
422
+
423
+
return (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
424
+
? 1 : 0;
425
+
}
426
+
427
+
int softing_startstop(struct net_device *dev, int up)
428
+
{
429
+
int ret;
430
+
struct softing *card;
431
+
struct softing_priv *priv;
432
+
struct net_device *netdev;
433
+
int bus_bitmask_start;
434
+
int j, error_reporting;
435
+
struct can_frame msg;
436
+
const struct can_bittiming *bt;
437
+
438
+
priv = netdev_priv(dev);
439
+
card = priv->card;
440
+
441
+
if (!card->fw.up)
442
+
return -EIO;
443
+
444
+
ret = mutex_lock_interruptible(&card->fw.lock);
445
+
if (ret)
446
+
return ret;
447
+
448
+
bus_bitmask_start = 0;
449
+
if (dev && up)
450
+
/* prepare to start this bus as well */
451
+
bus_bitmask_start |= (1 << priv->index);
452
+
/* bring netdevs down */
453
+
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
454
+
netdev = card->net[j];
455
+
if (!netdev)
456
+
continue;
457
+
priv = netdev_priv(netdev);
458
+
459
+
if (dev != netdev)
460
+
netif_stop_queue(netdev);
461
+
462
+
if (netif_running(netdev)) {
463
+
if (dev != netdev)
464
+
bus_bitmask_start |= (1 << j);
465
+
priv->tx.pending = 0;
466
+
priv->tx.echo_put = 0;
467
+
priv->tx.echo_get = 0;
468
+
/*
469
+
* this bus' may just have called open_candev()
470
+
* which is rather stupid to call close_candev()
471
+
* already
472
+
* but we may come here from busoff recovery too
473
+
* in which case the echo_skb _needs_ flushing too.
474
+
* just be sure to call open_candev() again
475
+
*/
476
+
close_candev(netdev);
477
+
}
478
+
priv->can.state = CAN_STATE_STOPPED;
479
+
}
480
+
card->tx.pending = 0;
481
+
482
+
softing_enable_irq(card, 0);
483
+
ret = softing_reset_chip(card);
484
+
if (ret)
485
+
goto failed;
486
+
if (!bus_bitmask_start)
487
+
/* no busses to be brought up */
488
+
goto card_done;
489
+
490
+
if ((bus_bitmask_start & 1) && (bus_bitmask_start & 2)
491
+
&& (softing_error_reporting(card->net[0])
492
+
!= softing_error_reporting(card->net[1]))) {
493
+
dev_alert(&card->pdev->dev,
494
+
"err_reporting flag differs for busses\n");
495
+
goto invalid;
496
+
}
497
+
error_reporting = 0;
498
+
if (bus_bitmask_start & 1) {
499
+
netdev = card->net[0];
500
+
priv = netdev_priv(netdev);
501
+
error_reporting += softing_error_reporting(netdev);
502
+
/* init chip 1 */
503
+
bt = &priv->can.bittiming;
504
+
iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
505
+
iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
506
+
iowrite16(bt->phase_seg1 + bt->prop_seg,
507
+
&card->dpram[DPRAM_FCT_PARAM + 6]);
508
+
iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
509
+
iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
510
+
&card->dpram[DPRAM_FCT_PARAM + 10]);
511
+
ret = softing_fct_cmd(card, 1, "initialize_chip[0]");
512
+
if (ret < 0)
513
+
goto failed;
514
+
/* set mode */
515
+
iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
516
+
iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
517
+
ret = softing_fct_cmd(card, 3, "set_mode[0]");
518
+
if (ret < 0)
519
+
goto failed;
520
+
/* set filter */
521
+
/* 11bit id & mask */
522
+
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
523
+
iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
524
+
/* 29bit id.lo & mask.lo & id.hi & mask.hi */
525
+
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
526
+
iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
527
+
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
528
+
iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
529
+
ret = softing_fct_cmd(card, 7, "set_filter[0]");
530
+
if (ret < 0)
531
+
goto failed;
532
+
/* set output control */
533
+
iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
534
+
ret = softing_fct_cmd(card, 5, "set_output[0]");
535
+
if (ret < 0)
536
+
goto failed;
537
+
}
538
+
if (bus_bitmask_start & 2) {
539
+
netdev = card->net[1];
540
+
priv = netdev_priv(netdev);
541
+
error_reporting += softing_error_reporting(netdev);
542
+
/* init chip2 */
543
+
bt = &priv->can.bittiming;
544
+
iowrite16(bt->brp, &card->dpram[DPRAM_FCT_PARAM + 2]);
545
+
iowrite16(bt->sjw, &card->dpram[DPRAM_FCT_PARAM + 4]);
546
+
iowrite16(bt->phase_seg1 + bt->prop_seg,
547
+
&card->dpram[DPRAM_FCT_PARAM + 6]);
548
+
iowrite16(bt->phase_seg2, &card->dpram[DPRAM_FCT_PARAM + 8]);
549
+
iowrite16((priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES) ? 1 : 0,
550
+
&card->dpram[DPRAM_FCT_PARAM + 10]);
551
+
ret = softing_fct_cmd(card, 2, "initialize_chip[1]");
552
+
if (ret < 0)
553
+
goto failed;
554
+
/* set mode2 */
555
+
iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 2]);
556
+
iowrite16(0, &card->dpram[DPRAM_FCT_PARAM + 4]);
557
+
ret = softing_fct_cmd(card, 4, "set_mode[1]");
558
+
if (ret < 0)
559
+
goto failed;
560
+
/* set filter2 */
561
+
/* 11bit id & mask */
562
+
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 2]);
563
+
iowrite16(0x07ff, &card->dpram[DPRAM_FCT_PARAM + 4]);
564
+
/* 29bit id.lo & mask.lo & id.hi & mask.hi */
565
+
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 6]);
566
+
iowrite16(0xffff, &card->dpram[DPRAM_FCT_PARAM + 8]);
567
+
iowrite16(0x0000, &card->dpram[DPRAM_FCT_PARAM + 10]);
568
+
iowrite16(0x1fff, &card->dpram[DPRAM_FCT_PARAM + 12]);
569
+
ret = softing_fct_cmd(card, 8, "set_filter[1]");
570
+
if (ret < 0)
571
+
goto failed;
572
+
/* set output control2 */
573
+
iowrite16(priv->output, &card->dpram[DPRAM_FCT_PARAM + 2]);
574
+
ret = softing_fct_cmd(card, 6, "set_output[1]");
575
+
if (ret < 0)
576
+
goto failed;
577
+
}
578
+
/* enable_error_frame */
579
+
/*
580
+
* Error reporting is switched off at the moment since
581
+
* the receiving of them is not yet 100% verified
582
+
* This should be enabled sooner or later
583
+
*
584
+
if (error_reporting) {
585
+
ret = softing_fct_cmd(card, 51, "enable_error_frame");
586
+
if (ret < 0)
587
+
goto failed;
588
+
}
589
+
*/
590
+
/* initialize interface */
591
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 2]);
592
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 4]);
593
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 6]);
594
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 8]);
595
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 10]);
596
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 12]);
597
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 14]);
598
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 16]);
599
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 18]);
600
+
iowrite16(1, &card->dpram[DPRAM_FCT_PARAM + 20]);
601
+
ret = softing_fct_cmd(card, 17, "initialize_interface");
602
+
if (ret < 0)
603
+
goto failed;
604
+
/* enable_fifo */
605
+
ret = softing_fct_cmd(card, 36, "enable_fifo");
606
+
if (ret < 0)
607
+
goto failed;
608
+
/* enable fifo tx ack */
609
+
ret = softing_fct_cmd(card, 13, "fifo_tx_ack[0]");
610
+
if (ret < 0)
611
+
goto failed;
612
+
/* enable fifo tx ack2 */
613
+
ret = softing_fct_cmd(card, 14, "fifo_tx_ack[1]");
614
+
if (ret < 0)
615
+
goto failed;
616
+
/* start_chip */
617
+
ret = softing_fct_cmd(card, 11, "start_chip");
618
+
if (ret < 0)
619
+
goto failed;
620
+
iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE]);
621
+
iowrite8(0, &card->dpram[DPRAM_INFO_BUSSTATE2]);
622
+
if (card->pdat->generation < 2) {
623
+
iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
624
+
/* flush the DPRAM caches */
625
+
wmb();
626
+
}
627
+
628
+
softing_initialize_timestamp(card);
629
+
630
+
/*
631
+
* do socketcan notifications/status changes
632
+
* from here, no errors should occur, or the failed: part
633
+
* must be reviewed
634
+
*/
635
+
memset(&msg, 0, sizeof(msg));
636
+
msg.can_id = CAN_ERR_FLAG | CAN_ERR_RESTARTED;
637
+
msg.can_dlc = CAN_ERR_DLC;
638
+
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
639
+
if (!(bus_bitmask_start & (1 << j)))
640
+
continue;
641
+
netdev = card->net[j];
642
+
if (!netdev)
643
+
continue;
644
+
priv = netdev_priv(netdev);
645
+
priv->can.state = CAN_STATE_ERROR_ACTIVE;
646
+
open_candev(netdev);
647
+
if (dev != netdev) {
648
+
/* notify other busses on the restart */
649
+
softing_netdev_rx(netdev, &msg, ktime_set(0, 0));
650
+
++priv->can.can_stats.restarts;
651
+
}
652
+
netif_wake_queue(netdev);
653
+
}
654
+
655
+
/* enable interrupts */
656
+
ret = softing_enable_irq(card, 1);
657
+
if (ret)
658
+
goto failed;
659
+
card_done:
660
+
mutex_unlock(&card->fw.lock);
661
+
return 0;
662
+
invalid:
663
+
ret = -EINVAL;
664
+
failed:
665
+
softing_enable_irq(card, 0);
666
+
softing_reset_chip(card);
667
+
mutex_unlock(&card->fw.lock);
668
+
/* bring all other interfaces down */
669
+
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
670
+
netdev = card->net[j];
671
+
if (!netdev)
672
+
continue;
673
+
dev_close(netdev);
674
+
}
675
+
return ret;
676
+
}
677
+
678
+
int softing_default_output(struct net_device *netdev)
679
+
{
680
+
struct softing_priv *priv = netdev_priv(netdev);
681
+
struct softing *card = priv->card;
682
+
683
+
switch (priv->chip) {
684
+
case 1000:
685
+
return (card->pdat->generation < 2) ? 0xfb : 0xfa;
686
+
case 5:
687
+
return 0x60;
688
+
default:
689
+
return 0x40;
690
+
}
691
+
}
+893
drivers/net/can/softing/softing_main.c
+893
drivers/net/can/softing/softing_main.c
···
1
+
/*
2
+
* Copyright (C) 2008-2010
3
+
*
4
+
* - Kurt Van Dijck, EIA Electronics
5
+
*
6
+
* This program is free software; you can redistribute it and/or modify
7
+
* it under the terms of the version 2 of the GNU General Public License
8
+
* as published by the Free Software Foundation
9
+
*
10
+
* This program is distributed in the hope that it will be useful,
11
+
* but WITHOUT ANY WARRANTY; without even the implied warranty of
12
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
+
* GNU General Public License for more details.
14
+
*
15
+
* You should have received a copy of the GNU General Public License
16
+
* along with this program; if not, write to the Free Software
17
+
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
+
*/
19
+
20
+
#include <linux/version.h>
21
+
#include <linux/module.h>
22
+
#include <linux/init.h>
23
+
#include <linux/interrupt.h>
24
+
25
+
#include "softing.h"
26
+
27
+
#define TX_ECHO_SKB_MAX (((TXMAX+1)/2)-1)
28
+
29
+
/*
30
+
* test is a specific CAN netdev
31
+
* is online (ie. up 'n running, not sleeping, not busoff
32
+
*/
33
+
static inline int canif_is_active(struct net_device *netdev)
34
+
{
35
+
struct can_priv *can = netdev_priv(netdev);
36
+
37
+
if (!netif_running(netdev))
38
+
return 0;
39
+
return (can->state <= CAN_STATE_ERROR_PASSIVE);
40
+
}
41
+
42
+
/* reset DPRAM */
43
+
static inline void softing_set_reset_dpram(struct softing *card)
44
+
{
45
+
if (card->pdat->generation >= 2) {
46
+
spin_lock_bh(&card->spin);
47
+
iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) & ~1,
48
+
&card->dpram[DPRAM_V2_RESET]);
49
+
spin_unlock_bh(&card->spin);
50
+
}
51
+
}
52
+
53
+
static inline void softing_clr_reset_dpram(struct softing *card)
54
+
{
55
+
if (card->pdat->generation >= 2) {
56
+
spin_lock_bh(&card->spin);
57
+
iowrite8(ioread8(&card->dpram[DPRAM_V2_RESET]) | 1,
58
+
&card->dpram[DPRAM_V2_RESET]);
59
+
spin_unlock_bh(&card->spin);
60
+
}
61
+
}
62
+
63
+
/* trigger the tx queue-ing */
64
+
static netdev_tx_t softing_netdev_start_xmit(struct sk_buff *skb,
65
+
struct net_device *dev)
66
+
{
67
+
struct softing_priv *priv = netdev_priv(dev);
68
+
struct softing *card = priv->card;
69
+
int ret;
70
+
uint8_t *ptr;
71
+
uint8_t fifo_wr, fifo_rd;
72
+
struct can_frame *cf = (struct can_frame *)skb->data;
73
+
uint8_t buf[DPRAM_TX_SIZE];
74
+
75
+
if (can_dropped_invalid_skb(dev, skb))
76
+
return NETDEV_TX_OK;
77
+
78
+
spin_lock(&card->spin);
79
+
80
+
ret = NETDEV_TX_BUSY;
81
+
if (!card->fw.up ||
82
+
(card->tx.pending >= TXMAX) ||
83
+
(priv->tx.pending >= TX_ECHO_SKB_MAX))
84
+
goto xmit_done;
85
+
fifo_wr = ioread8(&card->dpram[DPRAM_TX_WR]);
86
+
fifo_rd = ioread8(&card->dpram[DPRAM_TX_RD]);
87
+
if (fifo_wr == fifo_rd)
88
+
/* fifo full */
89
+
goto xmit_done;
90
+
memset(buf, 0, sizeof(buf));
91
+
ptr = buf;
92
+
*ptr = CMD_TX;
93
+
if (cf->can_id & CAN_RTR_FLAG)
94
+
*ptr |= CMD_RTR;
95
+
if (cf->can_id & CAN_EFF_FLAG)
96
+
*ptr |= CMD_XTD;
97
+
if (priv->index)
98
+
*ptr |= CMD_BUS2;
99
+
++ptr;
100
+
*ptr++ = cf->can_dlc;
101
+
*ptr++ = (cf->can_id >> 0);
102
+
*ptr++ = (cf->can_id >> 8);
103
+
if (cf->can_id & CAN_EFF_FLAG) {
104
+
*ptr++ = (cf->can_id >> 16);
105
+
*ptr++ = (cf->can_id >> 24);
106
+
} else {
107
+
/* increment 1, not 2 as you might think */
108
+
ptr += 1;
109
+
}
110
+
if (!(cf->can_id & CAN_RTR_FLAG))
111
+
memcpy(ptr, &cf->data[0], cf->can_dlc);
112
+
memcpy_toio(&card->dpram[DPRAM_TX + DPRAM_TX_SIZE * fifo_wr],
113
+
buf, DPRAM_TX_SIZE);
114
+
if (++fifo_wr >= DPRAM_TX_CNT)
115
+
fifo_wr = 0;
116
+
iowrite8(fifo_wr, &card->dpram[DPRAM_TX_WR]);
117
+
card->tx.last_bus = priv->index;
118
+
++card->tx.pending;
119
+
++priv->tx.pending;
120
+
can_put_echo_skb(skb, dev, priv->tx.echo_put);
121
+
++priv->tx.echo_put;
122
+
if (priv->tx.echo_put >= TX_ECHO_SKB_MAX)
123
+
priv->tx.echo_put = 0;
124
+
/* can_put_echo_skb() saves the skb, safe to return TX_OK */
125
+
ret = NETDEV_TX_OK;
126
+
xmit_done:
127
+
spin_unlock(&card->spin);
128
+
if (card->tx.pending >= TXMAX) {
129
+
int j;
130
+
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
131
+
if (card->net[j])
132
+
netif_stop_queue(card->net[j]);
133
+
}
134
+
}
135
+
if (ret != NETDEV_TX_OK)
136
+
netif_stop_queue(dev);
137
+
138
+
return ret;
139
+
}
140
+
141
+
/*
142
+
* shortcut for skb delivery
143
+
*/
144
+
int softing_netdev_rx(struct net_device *netdev, const struct can_frame *msg,
145
+
ktime_t ktime)
146
+
{
147
+
struct sk_buff *skb;
148
+
struct can_frame *cf;
149
+
150
+
skb = alloc_can_skb(netdev, &cf);
151
+
if (!skb)
152
+
return -ENOMEM;
153
+
memcpy(cf, msg, sizeof(*msg));
154
+
skb->tstamp = ktime;
155
+
return netif_rx(skb);
156
+
}
157
+
158
+
/*
159
+
* softing_handle_1
160
+
* pop 1 entry from the DPRAM queue, and process
161
+
*/
162
+
static int softing_handle_1(struct softing *card)
163
+
{
164
+
struct net_device *netdev;
165
+
struct softing_priv *priv;
166
+
ktime_t ktime;
167
+
struct can_frame msg;
168
+
int cnt = 0, lost_msg;
169
+
uint8_t fifo_rd, fifo_wr, cmd;
170
+
uint8_t *ptr;
171
+
uint32_t tmp_u32;
172
+
uint8_t buf[DPRAM_RX_SIZE];
173
+
174
+
memset(&msg, 0, sizeof(msg));
175
+
/* test for lost msgs */
176
+
lost_msg = ioread8(&card->dpram[DPRAM_RX_LOST]);
177
+
if (lost_msg) {
178
+
int j;
179
+
/* reset condition */
180
+
iowrite8(0, &card->dpram[DPRAM_RX_LOST]);
181
+
/* prepare msg */
182
+
msg.can_id = CAN_ERR_FLAG | CAN_ERR_CRTL;
183
+
msg.can_dlc = CAN_ERR_DLC;
184
+
msg.data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
185
+
/*
186
+
* service to all busses, we don't know which it was applicable
187
+
* but only service busses that are online
188
+
*/
189
+
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
190
+
netdev = card->net[j];
191
+
if (!netdev)
192
+
continue;
193
+
if (!canif_is_active(netdev))
194
+
/* a dead bus has no overflows */
195
+
continue;
196
+
++netdev->stats.rx_over_errors;
197
+
softing_netdev_rx(netdev, &msg, ktime_set(0, 0));
198
+
}
199
+
/* prepare for other use */
200
+
memset(&msg, 0, sizeof(msg));
201
+
++cnt;
202
+
}
203
+
204
+
fifo_rd = ioread8(&card->dpram[DPRAM_RX_RD]);
205
+
fifo_wr = ioread8(&card->dpram[DPRAM_RX_WR]);
206
+
207
+
if (++fifo_rd >= DPRAM_RX_CNT)
208
+
fifo_rd = 0;
209
+
if (fifo_wr == fifo_rd)
210
+
return cnt;
211
+
212
+
memcpy_fromio(buf, &card->dpram[DPRAM_RX + DPRAM_RX_SIZE*fifo_rd],
213
+
DPRAM_RX_SIZE);
214
+
mb();
215
+
/* trigger dual port RAM */
216
+
iowrite8(fifo_rd, &card->dpram[DPRAM_RX_RD]);
217
+
218
+
ptr = buf;
219
+
cmd = *ptr++;
220
+
if (cmd == 0xff)
221
+
/* not quite usefull, probably the card has got out */
222
+
return 0;
223
+
netdev = card->net[0];
224
+
if (cmd & CMD_BUS2)
225
+
netdev = card->net[1];
226
+
priv = netdev_priv(netdev);
227
+
228
+
if (cmd & CMD_ERR) {
229
+
uint8_t can_state, state;
230
+
231
+
state = *ptr++;
232
+
233
+
msg.can_id = CAN_ERR_FLAG;
234
+
msg.can_dlc = CAN_ERR_DLC;
235
+
236
+
if (state & SF_MASK_BUSOFF) {
237
+
can_state = CAN_STATE_BUS_OFF;
238
+
msg.can_id |= CAN_ERR_BUSOFF;
239
+
state = STATE_BUSOFF;
240
+
} else if (state & SF_MASK_EPASSIVE) {
241
+
can_state = CAN_STATE_ERROR_PASSIVE;
242
+
msg.can_id |= CAN_ERR_CRTL;
243
+
msg.data[1] = CAN_ERR_CRTL_TX_PASSIVE;
244
+
state = STATE_EPASSIVE;
245
+
} else {
246
+
can_state = CAN_STATE_ERROR_ACTIVE;
247
+
msg.can_id |= CAN_ERR_CRTL;
248
+
state = STATE_EACTIVE;
249
+
}
250
+
/* update DPRAM */
251
+
iowrite8(state, &card->dpram[priv->index ?
252
+
DPRAM_INFO_BUSSTATE2 : DPRAM_INFO_BUSSTATE]);
253
+
/* timestamp */
254
+
tmp_u32 = le32_to_cpup((void *)ptr);
255
+
ptr += 4;
256
+
ktime = softing_raw2ktime(card, tmp_u32);
257
+
258
+
++netdev->stats.rx_errors;
259
+
/* update internal status */
260
+
if (can_state != priv->can.state) {
261
+
priv->can.state = can_state;
262
+
if (can_state == CAN_STATE_ERROR_PASSIVE)
263
+
++priv->can.can_stats.error_passive;
264
+
else if (can_state == CAN_STATE_BUS_OFF) {
265
+
/* this calls can_close_cleanup() */
266
+
can_bus_off(netdev);
267
+
netif_stop_queue(netdev);
268
+
}
269
+
/* trigger socketcan */
270
+
softing_netdev_rx(netdev, &msg, ktime);
271
+
}
272
+
273
+
} else {
274
+
if (cmd & CMD_RTR)
275
+
msg.can_id |= CAN_RTR_FLAG;
276
+
msg.can_dlc = get_can_dlc(*ptr++);
277
+
if (cmd & CMD_XTD) {
278
+
msg.can_id |= CAN_EFF_FLAG;
279
+
msg.can_id |= le32_to_cpup((void *)ptr);
280
+
ptr += 4;
281
+
} else {
282
+
msg.can_id |= le16_to_cpup((void *)ptr);
283
+
ptr += 2;
284
+
}
285
+
/* timestamp */
286
+
tmp_u32 = le32_to_cpup((void *)ptr);
287
+
ptr += 4;
288
+
ktime = softing_raw2ktime(card, tmp_u32);
289
+
if (!(msg.can_id & CAN_RTR_FLAG))
290
+
memcpy(&msg.data[0], ptr, 8);
291
+
ptr += 8;
292
+
/* update socket */
293
+
if (cmd & CMD_ACK) {
294
+
/* acknowledge, was tx msg */
295
+
struct sk_buff *skb;
296
+
skb = priv->can.echo_skb[priv->tx.echo_get];
297
+
if (skb)
298
+
skb->tstamp = ktime;
299
+
can_get_echo_skb(netdev, priv->tx.echo_get);
300
+
++priv->tx.echo_get;
301
+
if (priv->tx.echo_get >= TX_ECHO_SKB_MAX)
302
+
priv->tx.echo_get = 0;
303
+
if (priv->tx.pending)
304
+
--priv->tx.pending;
305
+
if (card->tx.pending)
306
+
--card->tx.pending;
307
+
++netdev->stats.tx_packets;
308
+
if (!(msg.can_id & CAN_RTR_FLAG))
309
+
netdev->stats.tx_bytes += msg.can_dlc;
310
+
} else {
311
+
int ret;
312
+
313
+
ret = softing_netdev_rx(netdev, &msg, ktime);
314
+
if (ret == NET_RX_SUCCESS) {
315
+
++netdev->stats.rx_packets;
316
+
if (!(msg.can_id & CAN_RTR_FLAG))
317
+
netdev->stats.rx_bytes += msg.can_dlc;
318
+
} else {
319
+
++netdev->stats.rx_dropped;
320
+
}
321
+
}
322
+
}
323
+
++cnt;
324
+
return cnt;
325
+
}
326
+
327
+
/*
328
+
* real interrupt handler
329
+
*/
330
+
static irqreturn_t softing_irq_thread(int irq, void *dev_id)
331
+
{
332
+
struct softing *card = (struct softing *)dev_id;
333
+
struct net_device *netdev;
334
+
struct softing_priv *priv;
335
+
int j, offset, work_done;
336
+
337
+
work_done = 0;
338
+
spin_lock_bh(&card->spin);
339
+
while (softing_handle_1(card) > 0) {
340
+
++card->irq.svc_count;
341
+
++work_done;
342
+
}
343
+
spin_unlock_bh(&card->spin);
344
+
/* resume tx queue's */
345
+
offset = card->tx.last_bus;
346
+
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
347
+
if (card->tx.pending >= TXMAX)
348
+
break;
349
+
netdev = card->net[(j + offset + 1) % card->pdat->nbus];
350
+
if (!netdev)
351
+
continue;
352
+
priv = netdev_priv(netdev);
353
+
if (!canif_is_active(netdev))
354
+
/* it makes no sense to wake dead busses */
355
+
continue;
356
+
if (priv->tx.pending >= TX_ECHO_SKB_MAX)
357
+
continue;
358
+
++work_done;
359
+
netif_wake_queue(netdev);
360
+
}
361
+
return work_done ? IRQ_HANDLED : IRQ_NONE;
362
+
}
363
+
364
+
/*
365
+
* interrupt routines:
366
+
* schedule the 'real interrupt handler'
367
+
*/
368
+
static irqreturn_t softing_irq_v2(int irq, void *dev_id)
369
+
{
370
+
struct softing *card = (struct softing *)dev_id;
371
+
uint8_t ir;
372
+
373
+
ir = ioread8(&card->dpram[DPRAM_V2_IRQ_TOHOST]);
374
+
iowrite8(0, &card->dpram[DPRAM_V2_IRQ_TOHOST]);
375
+
return (1 == ir) ? IRQ_WAKE_THREAD : IRQ_NONE;
376
+
}
377
+
378
+
static irqreturn_t softing_irq_v1(int irq, void *dev_id)
379
+
{
380
+
struct softing *card = (struct softing *)dev_id;
381
+
uint8_t ir;
382
+
383
+
ir = ioread8(&card->dpram[DPRAM_IRQ_TOHOST]);
384
+
iowrite8(0, &card->dpram[DPRAM_IRQ_TOHOST]);
385
+
return ir ? IRQ_WAKE_THREAD : IRQ_NONE;
386
+
}
387
+
388
+
/*
389
+
* netdev/candev inter-operability
390
+
*/
391
+
static int softing_netdev_open(struct net_device *ndev)
392
+
{
393
+
int ret;
394
+
395
+
/* check or determine and set bittime */
396
+
ret = open_candev(ndev);
397
+
if (!ret)
398
+
ret = softing_startstop(ndev, 1);
399
+
return ret;
400
+
}
401
+
402
+
static int softing_netdev_stop(struct net_device *ndev)
403
+
{
404
+
int ret;
405
+
406
+
netif_stop_queue(ndev);
407
+
408
+
/* softing cycle does close_candev() */
409
+
ret = softing_startstop(ndev, 0);
410
+
return ret;
411
+
}
412
+
413
+
static int softing_candev_set_mode(struct net_device *ndev, enum can_mode mode)
414
+
{
415
+
int ret;
416
+
417
+
switch (mode) {
418
+
case CAN_MODE_START:
419
+
/* softing_startstop does close_candev() */
420
+
ret = softing_startstop(ndev, 1);
421
+
return ret;
422
+
case CAN_MODE_STOP:
423
+
case CAN_MODE_SLEEP:
424
+
return -EOPNOTSUPP;
425
+
}
426
+
return 0;
427
+
}
428
+
429
+
/*
430
+
* Softing device management helpers
431
+
*/
432
+
int softing_enable_irq(struct softing *card, int enable)
433
+
{
434
+
int ret;
435
+
436
+
if (!card->irq.nr) {
437
+
return 0;
438
+
} else if (card->irq.requested && !enable) {
439
+
free_irq(card->irq.nr, card);
440
+
card->irq.requested = 0;
441
+
} else if (!card->irq.requested && enable) {
442
+
ret = request_threaded_irq(card->irq.nr,
443
+
(card->pdat->generation >= 2) ?
444
+
softing_irq_v2 : softing_irq_v1,
445
+
softing_irq_thread, IRQF_SHARED,
446
+
dev_name(&card->pdev->dev), card);
447
+
if (ret) {
448
+
dev_alert(&card->pdev->dev,
449
+
"request_threaded_irq(%u) failed\n",
450
+
card->irq.nr);
451
+
return ret;
452
+
}
453
+
card->irq.requested = 1;
454
+
}
455
+
return 0;
456
+
}
457
+
458
+
static void softing_card_shutdown(struct softing *card)
459
+
{
460
+
int fw_up = 0;
461
+
462
+
if (mutex_lock_interruptible(&card->fw.lock))
463
+
/* return -ERESTARTSYS */;
464
+
fw_up = card->fw.up;
465
+
card->fw.up = 0;
466
+
467
+
if (card->irq.requested && card->irq.nr) {
468
+
free_irq(card->irq.nr, card);
469
+
card->irq.requested = 0;
470
+
}
471
+
if (fw_up) {
472
+
if (card->pdat->enable_irq)
473
+
card->pdat->enable_irq(card->pdev, 0);
474
+
softing_set_reset_dpram(card);
475
+
if (card->pdat->reset)
476
+
card->pdat->reset(card->pdev, 1);
477
+
}
478
+
mutex_unlock(&card->fw.lock);
479
+
}
480
+
481
+
static __devinit int softing_card_boot(struct softing *card)
482
+
{
483
+
int ret, j;
484
+
static const uint8_t stream[] = {
485
+
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, };
486
+
unsigned char back[sizeof(stream)];
487
+
488
+
if (mutex_lock_interruptible(&card->fw.lock))
489
+
return -ERESTARTSYS;
490
+
if (card->fw.up) {
491
+
mutex_unlock(&card->fw.lock);
492
+
return 0;
493
+
}
494
+
/* reset board */
495
+
if (card->pdat->enable_irq)
496
+
card->pdat->enable_irq(card->pdev, 1);
497
+
/* boot card */
498
+
softing_set_reset_dpram(card);
499
+
if (card->pdat->reset)
500
+
card->pdat->reset(card->pdev, 1);
501
+
for (j = 0; (j + sizeof(stream)) < card->dpram_size;
502
+
j += sizeof(stream)) {
503
+
504
+
memcpy_toio(&card->dpram[j], stream, sizeof(stream));
505
+
/* flush IO cache */
506
+
mb();
507
+
memcpy_fromio(back, &card->dpram[j], sizeof(stream));
508
+
509
+
if (!memcmp(back, stream, sizeof(stream)))
510
+
continue;
511
+
/* memory is not equal */
512
+
dev_alert(&card->pdev->dev, "dpram failed at 0x%04x\n", j);
513
+
ret = -EIO;
514
+
goto failed;
515
+
}
516
+
wmb();
517
+
/* load boot firmware */
518
+
ret = softing_load_fw(card->pdat->boot.fw, card, card->dpram,
519
+
card->dpram_size,
520
+
card->pdat->boot.offs - card->pdat->boot.addr);
521
+
if (ret < 0)
522
+
goto failed;
523
+
/* load loader firmware */
524
+
ret = softing_load_fw(card->pdat->load.fw, card, card->dpram,
525
+
card->dpram_size,
526
+
card->pdat->load.offs - card->pdat->load.addr);
527
+
if (ret < 0)
528
+
goto failed;
529
+
530
+
if (card->pdat->reset)
531
+
card->pdat->reset(card->pdev, 0);
532
+
softing_clr_reset_dpram(card);
533
+
ret = softing_bootloader_command(card, 0, "card boot");
534
+
if (ret < 0)
535
+
goto failed;
536
+
ret = softing_load_app_fw(card->pdat->app.fw, card);
537
+
if (ret < 0)
538
+
goto failed;
539
+
540
+
ret = softing_chip_poweron(card);
541
+
if (ret < 0)
542
+
goto failed;
543
+
544
+
card->fw.up = 1;
545
+
mutex_unlock(&card->fw.lock);
546
+
return 0;
547
+
failed:
548
+
card->fw.up = 0;
549
+
if (card->pdat->enable_irq)
550
+
card->pdat->enable_irq(card->pdev, 0);
551
+
softing_set_reset_dpram(card);
552
+
if (card->pdat->reset)
553
+
card->pdat->reset(card->pdev, 1);
554
+
mutex_unlock(&card->fw.lock);
555
+
return ret;
556
+
}
557
+
558
+
/*
559
+
* netdev sysfs
560
+
*/
561
+
static ssize_t show_channel(struct device *dev, struct device_attribute *attr,
562
+
char *buf)
563
+
{
564
+
struct net_device *ndev = to_net_dev(dev);
565
+
struct softing_priv *priv = netdev2softing(ndev);
566
+
567
+
return sprintf(buf, "%i\n", priv->index);
568
+
}
569
+
570
+
static ssize_t show_chip(struct device *dev, struct device_attribute *attr,
571
+
char *buf)
572
+
{
573
+
struct net_device *ndev = to_net_dev(dev);
574
+
struct softing_priv *priv = netdev2softing(ndev);
575
+
576
+
return sprintf(buf, "%i\n", priv->chip);
577
+
}
578
+
579
+
static ssize_t show_output(struct device *dev, struct device_attribute *attr,
580
+
char *buf)
581
+
{
582
+
struct net_device *ndev = to_net_dev(dev);
583
+
struct softing_priv *priv = netdev2softing(ndev);
584
+
585
+
return sprintf(buf, "0x%02x\n", priv->output);
586
+
}
587
+
588
+
static ssize_t store_output(struct device *dev, struct device_attribute *attr,
589
+
const char *buf, size_t count)
590
+
{
591
+
struct net_device *ndev = to_net_dev(dev);
592
+
struct softing_priv *priv = netdev2softing(ndev);
593
+
struct softing *card = priv->card;
594
+
unsigned long val;
595
+
int ret;
596
+
597
+
ret = strict_strtoul(buf, 0, &val);
598
+
if (ret < 0)
599
+
return ret;
600
+
val &= 0xFF;
601
+
602
+
ret = mutex_lock_interruptible(&card->fw.lock);
603
+
if (ret)
604
+
return -ERESTARTSYS;
605
+
if (netif_running(ndev)) {
606
+
mutex_unlock(&card->fw.lock);
607
+
return -EBUSY;
608
+
}
609
+
priv->output = val;
610
+
mutex_unlock(&card->fw.lock);
611
+
return count;
612
+
}
613
+
614
+
static const DEVICE_ATTR(channel, S_IRUGO, show_channel, NULL);
615
+
static const DEVICE_ATTR(chip, S_IRUGO, show_chip, NULL);
616
+
static const DEVICE_ATTR(output, S_IRUGO | S_IWUSR, show_output, store_output);
617
+
618
+
static const struct attribute *const netdev_sysfs_attrs[] = {
619
+
&dev_attr_channel.attr,
620
+
&dev_attr_chip.attr,
621
+
&dev_attr_output.attr,
622
+
NULL,
623
+
};
624
+
static const struct attribute_group netdev_sysfs_group = {
625
+
.name = NULL,
626
+
.attrs = (struct attribute **)netdev_sysfs_attrs,
627
+
};
628
+
629
+
static const struct net_device_ops softing_netdev_ops = {
630
+
.ndo_open = softing_netdev_open,
631
+
.ndo_stop = softing_netdev_stop,
632
+
.ndo_start_xmit = softing_netdev_start_xmit,
633
+
};
634
+
635
+
static const struct can_bittiming_const softing_btr_const = {
636
+
.tseg1_min = 1,
637
+
.tseg1_max = 16,
638
+
.tseg2_min = 1,
639
+
.tseg2_max = 8,
640
+
.sjw_max = 4, /* overruled */
641
+
.brp_min = 1,
642
+
.brp_max = 32, /* overruled */
643
+
.brp_inc = 1,
644
+
};
645
+
646
+
647
+
static __devinit struct net_device *softing_netdev_create(struct softing *card,
648
+
uint16_t chip_id)
649
+
{
650
+
struct net_device *netdev;
651
+
struct softing_priv *priv;
652
+
653
+
netdev = alloc_candev(sizeof(*priv), TX_ECHO_SKB_MAX);
654
+
if (!netdev) {
655
+
dev_alert(&card->pdev->dev, "alloc_candev failed\n");
656
+
return NULL;
657
+
}
658
+
priv = netdev_priv(netdev);
659
+
priv->netdev = netdev;
660
+
priv->card = card;
661
+
memcpy(&priv->btr_const, &softing_btr_const, sizeof(priv->btr_const));
662
+
priv->btr_const.brp_max = card->pdat->max_brp;
663
+
priv->btr_const.sjw_max = card->pdat->max_sjw;
664
+
priv->can.bittiming_const = &priv->btr_const;
665
+
priv->can.clock.freq = 8000000;
666
+
priv->chip = chip_id;
667
+
priv->output = softing_default_output(netdev);
668
+
SET_NETDEV_DEV(netdev, &card->pdev->dev);
669
+
670
+
netdev->flags |= IFF_ECHO;
671
+
netdev->netdev_ops = &softing_netdev_ops;
672
+
priv->can.do_set_mode = softing_candev_set_mode;
673
+
priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES;
674
+
675
+
return netdev;
676
+
}
677
+
678
+
static __devinit int softing_netdev_register(struct net_device *netdev)
679
+
{
680
+
int ret;
681
+
682
+
netdev->sysfs_groups[0] = &netdev_sysfs_group;
683
+
ret = register_candev(netdev);
684
+
if (ret) {
685
+
dev_alert(&netdev->dev, "register failed\n");
686
+
return ret;
687
+
}
688
+
return 0;
689
+
}
690
+
691
+
static void softing_netdev_cleanup(struct net_device *netdev)
692
+
{
693
+
unregister_candev(netdev);
694
+
free_candev(netdev);
695
+
}
696
+
697
+
/*
698
+
* sysfs for Platform device
699
+
*/
700
+
#define DEV_ATTR_RO(name, member) \
701
+
static ssize_t show_##name(struct device *dev, \
702
+
struct device_attribute *attr, char *buf) \
703
+
{ \
704
+
struct softing *card = platform_get_drvdata(to_platform_device(dev)); \
705
+
return sprintf(buf, "%u\n", card->member); \
706
+
} \
707
+
static DEVICE_ATTR(name, 0444, show_##name, NULL)
708
+
709
+
#define DEV_ATTR_RO_STR(name, member) \
710
+
static ssize_t show_##name(struct device *dev, \
711
+
struct device_attribute *attr, char *buf) \
712
+
{ \
713
+
struct softing *card = platform_get_drvdata(to_platform_device(dev)); \
714
+
return sprintf(buf, "%s\n", card->member); \
715
+
} \
716
+
static DEVICE_ATTR(name, 0444, show_##name, NULL)
717
+
718
+
DEV_ATTR_RO(serial, id.serial);
719
+
DEV_ATTR_RO_STR(firmware, pdat->app.fw);
720
+
DEV_ATTR_RO(firmware_version, id.fw_version);
721
+
DEV_ATTR_RO_STR(hardware, pdat->name);
722
+
DEV_ATTR_RO(hardware_version, id.hw_version);
723
+
DEV_ATTR_RO(license, id.license);
724
+
DEV_ATTR_RO(frequency, id.freq);
725
+
DEV_ATTR_RO(txpending, tx.pending);
726
+
727
+
static struct attribute *softing_pdev_attrs[] = {
728
+
&dev_attr_serial.attr,
729
+
&dev_attr_firmware.attr,
730
+
&dev_attr_firmware_version.attr,
731
+
&dev_attr_hardware.attr,
732
+
&dev_attr_hardware_version.attr,
733
+
&dev_attr_license.attr,
734
+
&dev_attr_frequency.attr,
735
+
&dev_attr_txpending.attr,
736
+
NULL,
737
+
};
738
+
739
+
static const struct attribute_group softing_pdev_group = {
740
+
.name = NULL,
741
+
.attrs = softing_pdev_attrs,
742
+
};
743
+
744
+
/*
745
+
* platform driver
746
+
*/
747
+
static __devexit int softing_pdev_remove(struct platform_device *pdev)
748
+
{
749
+
struct softing *card = platform_get_drvdata(pdev);
750
+
int j;
751
+
752
+
/* first, disable card*/
753
+
softing_card_shutdown(card);
754
+
755
+
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
756
+
if (!card->net[j])
757
+
continue;
758
+
softing_netdev_cleanup(card->net[j]);
759
+
card->net[j] = NULL;
760
+
}
761
+
sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
762
+
763
+
iounmap(card->dpram);
764
+
kfree(card);
765
+
return 0;
766
+
}
767
+
768
+
static __devinit int softing_pdev_probe(struct platform_device *pdev)
769
+
{
770
+
const struct softing_platform_data *pdat = pdev->dev.platform_data;
771
+
struct softing *card;
772
+
struct net_device *netdev;
773
+
struct softing_priv *priv;
774
+
struct resource *pres;
775
+
int ret;
776
+
int j;
777
+
778
+
if (!pdat) {
779
+
dev_warn(&pdev->dev, "no platform data\n");
780
+
return -EINVAL;
781
+
}
782
+
if (pdat->nbus > ARRAY_SIZE(card->net)) {
783
+
dev_warn(&pdev->dev, "%u nets??\n", pdat->nbus);
784
+
return -EINVAL;
785
+
}
786
+
787
+
card = kzalloc(sizeof(*card), GFP_KERNEL);
788
+
if (!card)
789
+
return -ENOMEM;
790
+
card->pdat = pdat;
791
+
card->pdev = pdev;
792
+
platform_set_drvdata(pdev, card);
793
+
mutex_init(&card->fw.lock);
794
+
spin_lock_init(&card->spin);
795
+
796
+
ret = -EINVAL;
797
+
pres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
798
+
if (!pres)
799
+
goto platform_resource_failed;;
800
+
card->dpram_phys = pres->start;
801
+
card->dpram_size = pres->end - pres->start + 1;
802
+
card->dpram = ioremap_nocache(card->dpram_phys, card->dpram_size);
803
+
if (!card->dpram) {
804
+
dev_alert(&card->pdev->dev, "dpram ioremap failed\n");
805
+
goto ioremap_failed;
806
+
}
807
+
808
+
pres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
809
+
if (pres)
810
+
card->irq.nr = pres->start;
811
+
812
+
/* reset card */
813
+
ret = softing_card_boot(card);
814
+
if (ret < 0) {
815
+
dev_alert(&pdev->dev, "failed to boot\n");
816
+
goto boot_failed;
817
+
}
818
+
819
+
/* only now, the chip's are known */
820
+
card->id.freq = card->pdat->freq;
821
+
822
+
ret = sysfs_create_group(&pdev->dev.kobj, &softing_pdev_group);
823
+
if (ret < 0) {
824
+
dev_alert(&card->pdev->dev, "sysfs failed\n");
825
+
goto sysfs_failed;
826
+
}
827
+
828
+
ret = -ENOMEM;
829
+
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
830
+
card->net[j] = netdev =
831
+
softing_netdev_create(card, card->id.chip[j]);
832
+
if (!netdev) {
833
+
dev_alert(&pdev->dev, "failed to make can[%i]", j);
834
+
goto netdev_failed;
835
+
}
836
+
priv = netdev_priv(card->net[j]);
837
+
priv->index = j;
838
+
ret = softing_netdev_register(netdev);
839
+
if (ret) {
840
+
free_candev(netdev);
841
+
card->net[j] = NULL;
842
+
dev_alert(&card->pdev->dev,
843
+
"failed to register can[%i]\n", j);
844
+
goto netdev_failed;
845
+
}
846
+
}
847
+
dev_info(&card->pdev->dev, "%s ready.\n", card->pdat->name);
848
+
return 0;
849
+
850
+
netdev_failed:
851
+
for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
852
+
if (!card->net[j])
853
+
continue;
854
+
softing_netdev_cleanup(card->net[j]);
855
+
}
856
+
sysfs_remove_group(&pdev->dev.kobj, &softing_pdev_group);
857
+
sysfs_failed:
858
+
softing_card_shutdown(card);
859
+
boot_failed:
860
+
iounmap(card->dpram);
861
+
ioremap_failed:
862
+
platform_resource_failed:
863
+
kfree(card);
864
+
return ret;
865
+
}
866
+
867
+
static struct platform_driver softing_driver = {
868
+
.driver = {
869
+
.name = "softing",
870
+
.owner = THIS_MODULE,
871
+
},
872
+
.probe = softing_pdev_probe,
873
+
.remove = __devexit_p(softing_pdev_remove),
874
+
};
875
+
876
+
MODULE_ALIAS("platform:softing");
877
+
878
+
static int __init softing_start(void)
879
+
{
880
+
return platform_driver_register(&softing_driver);
881
+
}
882
+
883
+
static void __exit softing_stop(void)
884
+
{
885
+
platform_driver_unregister(&softing_driver);
886
+
}
887
+
888
+
module_init(softing_start);
889
+
module_exit(softing_stop);
890
+
891
+
MODULE_DESCRIPTION("Softing DPRAM CAN driver");
892
+
MODULE_AUTHOR("Kurt Van Dijck <kurt.van.dijck@eia.be>");
893
+
MODULE_LICENSE("GPL v2");
+40
drivers/net/can/softing/softing_platform.h
+40
drivers/net/can/softing/softing_platform.h
···
1
+
2
+
#include <linux/platform_device.h>
3
+
4
+
#ifndef _SOFTING_DEVICE_H_
5
+
#define _SOFTING_DEVICE_H_
6
+
7
+
/* softing firmware directory prefix */
8
+
#define fw_dir "softing-4.6/"
9
+
10
+
struct softing_platform_data {
11
+
unsigned int manf;
12
+
unsigned int prod;
13
+
/*
14
+
* generation
15
+
* 1st with NEC or SJA1000
16
+
* 8bit, exclusive interrupt, ...
17
+
* 2nd only SJA1000
18
+
* 16bit, shared interrupt
19
+
*/
20
+
int generation;
21
+
int nbus; /* # busses on device */
22
+
unsigned int freq; /* operating frequency in Hz */
23
+
unsigned int max_brp;
24
+
unsigned int max_sjw;
25
+
unsigned long dpram_size;
26
+
const char *name;
27
+
struct {
28
+
unsigned long offs;
29
+
unsigned long addr;
30
+
const char *fw;
31
+
} boot, load, app;
32
+
/*
33
+
* reset() function
34
+
* bring pdev in or out of reset, depending on value
35
+
*/
36
+
int (*reset)(struct platform_device *pdev, int value);
37
+
int (*enable_irq)(struct platform_device *pdev, int value);
38
+
};
39
+
40
+
#endif