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authorKalle Valo <kalle.valo@nokia.com>2009-06-12 07:17:19 -0400
committerJohn W. Linville <linville@tuxdriver.com>2009-07-10 14:57:49 -0400
commitef2f8d45771490de5b8373c25e983ee1e3aee9ea (patch)
tree0ddf8a416ab891a371ddcaf914c059387d65fe07 /drivers/net/wireless/wl12xx/spi.c
parentc731837855a9dcc2ec0c5367b0e16ad975aaed16 (diff)
wl1251: add wl1251 prefix to all 1251 files
Now that all 1271 files are split, we can add wl1251_ prefix to the files. Signed-off-by: Kalle Valo <kalle.valo@nokia.com> Reviewed-by: Vidhya Govindan <vidhya.govindan@nokia.com> Reviewed-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/wl12xx/spi.c')
-rw-r--r--drivers/net/wireless/wl12xx/spi.c395
1 files changed, 0 insertions, 395 deletions
diff --git a/drivers/net/wireless/wl12xx/spi.c b/drivers/net/wireless/wl12xx/spi.c
deleted file mode 100644
index 9c9943f98674..000000000000
--- a/drivers/net/wireless/wl12xx/spi.c
+++ /dev/null
@@ -1,395 +0,0 @@
1/*
2 * This file is part of wl12xx
3 *
4 * Copyright (C) 2008 Nokia Corporation
5 *
6 * Contact: Kalle Valo <kalle.valo@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24#include <linux/module.h>
25#include <linux/crc7.h>
26#include <linux/spi/spi.h>
27
28#include "wl12xx.h"
29#include "wl12xx_80211.h"
30#include "reg.h"
31#include "spi.h"
32#include "ps.h"
33
34static int wl12xx_translate_reg_addr(struct wl12xx *wl, int addr)
35{
36 /* If the address is lower than REGISTERS_BASE, it means that this is
37 * a chip-specific register address, so look it up in the registers
38 * table */
39 if (addr < REGISTERS_BASE) {
40 /* Make sure we don't go over the table */
41 if (addr >= ACX_REG_TABLE_LEN) {
42 wl12xx_error("address out of range (%d)", addr);
43 return -EINVAL;
44 }
45 addr = wl->chip.acx_reg_table[addr];
46 }
47
48 return addr - wl->physical_reg_addr + wl->virtual_reg_addr;
49}
50
51static int wl12xx_translate_mem_addr(struct wl12xx *wl, int addr)
52{
53 return addr - wl->physical_mem_addr + wl->virtual_mem_addr;
54}
55
56
57void wl12xx_spi_reset(struct wl12xx *wl)
58{
59 u8 *cmd;
60 struct spi_transfer t;
61 struct spi_message m;
62
63 cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
64 if (!cmd) {
65 wl12xx_error("could not allocate cmd for spi reset");
66 return;
67 }
68
69 memset(&t, 0, sizeof(t));
70 spi_message_init(&m);
71
72 memset(cmd, 0xff, WSPI_INIT_CMD_LEN);
73
74 t.tx_buf = cmd;
75 t.len = WSPI_INIT_CMD_LEN;
76 spi_message_add_tail(&t, &m);
77
78 spi_sync(wl->spi, &m);
79
80 wl12xx_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN);
81}
82
83void wl12xx_spi_init(struct wl12xx *wl)
84{
85 u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd;
86 struct spi_transfer t;
87 struct spi_message m;
88
89 cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL);
90 if (!cmd) {
91 wl12xx_error("could not allocate cmd for spi init");
92 return;
93 }
94
95 memset(crc, 0, sizeof(crc));
96 memset(&t, 0, sizeof(t));
97 spi_message_init(&m);
98
99 /*
100 * Set WSPI_INIT_COMMAND
101 * the data is being send from the MSB to LSB
102 */
103 cmd[2] = 0xff;
104 cmd[3] = 0xff;
105 cmd[1] = WSPI_INIT_CMD_START | WSPI_INIT_CMD_TX;
106 cmd[0] = 0;
107 cmd[7] = 0;
108 cmd[6] |= HW_ACCESS_WSPI_INIT_CMD_MASK << 3;
109 cmd[6] |= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN;
110
111 if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0)
112 cmd[5] |= WSPI_INIT_CMD_DIS_FIXEDBUSY;
113 else
114 cmd[5] |= WSPI_INIT_CMD_EN_FIXEDBUSY;
115
116 cmd[5] |= WSPI_INIT_CMD_IOD | WSPI_INIT_CMD_IP | WSPI_INIT_CMD_CS
117 | WSPI_INIT_CMD_WSPI | WSPI_INIT_CMD_WS;
118
119 crc[0] = cmd[1];
120 crc[1] = cmd[0];
121 crc[2] = cmd[7];
122 crc[3] = cmd[6];
123 crc[4] = cmd[5];
124
125 cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1;
126 cmd[4] |= WSPI_INIT_CMD_END;
127
128 t.tx_buf = cmd;
129 t.len = WSPI_INIT_CMD_LEN;
130 spi_message_add_tail(&t, &m);
131
132 spi_sync(wl->spi, &m);
133
134 wl12xx_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN);
135}
136
137/* Set the SPI partitions to access the chip addresses
138 *
139 * There are two VIRTUAL (SPI) partitions (the memory partition and the
140 * registers partition), which are mapped to two different areas of the
141 * PHYSICAL (hardware) memory. This function also makes other checks to
142 * ensure that the partitions are not overlapping. In the diagram below, the
143 * memory partition comes before the register partition, but the opposite is
144 * also supported.
145 *
146 * PHYSICAL address
147 * space
148 *
149 * | |
150 * ...+----+--> mem_start
151 * VIRTUAL address ... | |
152 * space ... | | [PART_0]
153 * ... | |
154 * 0x00000000 <--+----+... ...+----+--> mem_start + mem_size
155 * | | ... | |
156 * |MEM | ... | |
157 * | | ... | |
158 * part_size <--+----+... | | {unused area)
159 * | | ... | |
160 * |REG | ... | |
161 * part_size | | ... | |
162 * + <--+----+... ...+----+--> reg_start
163 * reg_size ... | |
164 * ... | | [PART_1]
165 * ... | |
166 * ...+----+--> reg_start + reg_size
167 * | |
168 *
169 */
170int wl12xx_set_partition(struct wl12xx *wl,
171 u32 mem_start, u32 mem_size,
172 u32 reg_start, u32 reg_size)
173{
174 struct wl12xx_partition *partition;
175 struct spi_transfer t;
176 struct spi_message m;
177 size_t len, cmd_len;
178 u32 *cmd;
179 int addr;
180
181 cmd_len = sizeof(u32) + 2 * sizeof(struct wl12xx_partition);
182 cmd = kzalloc(cmd_len, GFP_KERNEL);
183 if (!cmd)
184 return -ENOMEM;
185
186 spi_message_init(&m);
187 memset(&t, 0, sizeof(t));
188
189 partition = (struct wl12xx_partition *) (cmd + 1);
190 addr = HW_ACCESS_PART0_SIZE_ADDR;
191 len = 2 * sizeof(struct wl12xx_partition);
192
193 *cmd |= WSPI_CMD_WRITE;
194 *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
195 *cmd |= addr & WSPI_CMD_BYTE_ADDR;
196
197 wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
198 mem_start, mem_size);
199 wl12xx_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
200 reg_start, reg_size);
201
202 /* Make sure that the two partitions together don't exceed the
203 * address range */
204 if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
205 wl12xx_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
206 " address range. Truncating partition[0].");
207 mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
208 wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
209 mem_start, mem_size);
210 wl12xx_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
211 reg_start, reg_size);
212 }
213
214 if ((mem_start < reg_start) &&
215 ((mem_start + mem_size) > reg_start)) {
216 /* Guarantee that the memory partition doesn't overlap the
217 * registers partition */
218 wl12xx_debug(DEBUG_SPI, "End of partition[0] is "
219 "overlapping partition[1]. Adjusted.");
220 mem_size = reg_start - mem_start;
221 wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
222 mem_start, mem_size);
223 wl12xx_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
224 reg_start, reg_size);
225 } else if ((reg_start < mem_start) &&
226 ((reg_start + reg_size) > mem_start)) {
227 /* Guarantee that the register partition doesn't overlap the
228 * memory partition */
229 wl12xx_debug(DEBUG_SPI, "End of partition[1] is"
230 " overlapping partition[0]. Adjusted.");
231 reg_size = mem_start - reg_start;
232 wl12xx_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
233 mem_start, mem_size);
234 wl12xx_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
235 reg_start, reg_size);
236 }
237
238 partition[0].start = mem_start;
239 partition[0].size = mem_size;
240 partition[1].start = reg_start;
241 partition[1].size = reg_size;
242
243 wl->physical_mem_addr = mem_start;
244 wl->physical_reg_addr = reg_start;
245
246 wl->virtual_mem_addr = 0;
247 wl->virtual_reg_addr = mem_size;
248
249 t.tx_buf = cmd;
250 t.len = cmd_len;
251 spi_message_add_tail(&t, &m);
252
253 spi_sync(wl->spi, &m);
254
255 kfree(cmd);
256
257 return 0;
258}
259
260void wl12xx_spi_read(struct wl12xx *wl, int addr, void *buf,
261 size_t len, bool fixed)
262{
263 struct spi_transfer t[3];
264 struct spi_message m;
265 u8 *busy_buf;
266 u32 *cmd;
267
268 cmd = &wl->buffer_cmd;
269 busy_buf = wl->buffer_busyword;
270
271 *cmd = 0;
272 *cmd |= WSPI_CMD_READ;
273 *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
274 *cmd |= addr & WSPI_CMD_BYTE_ADDR;
275
276 if (fixed)
277 *cmd |= WSPI_CMD_FIXED;
278
279 spi_message_init(&m);
280 memset(t, 0, sizeof(t));
281
282 t[0].tx_buf = cmd;
283 t[0].len = 4;
284 spi_message_add_tail(&t[0], &m);
285
286 /* Busy and non busy words read */
287 t[1].rx_buf = busy_buf;
288 t[1].len = WL12XX_BUSY_WORD_LEN;
289 spi_message_add_tail(&t[1], &m);
290
291 t[2].rx_buf = buf;
292 t[2].len = len;
293 spi_message_add_tail(&t[2], &m);
294
295 spi_sync(wl->spi, &m);
296
297 /* FIXME: check busy words */
298
299 wl12xx_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd));
300 wl12xx_dump(DEBUG_SPI, "spi_read buf <- ", buf, len);
301}
302
303void wl12xx_spi_write(struct wl12xx *wl, int addr, void *buf,
304 size_t len, bool fixed)
305{
306 struct spi_transfer t[2];
307 struct spi_message m;
308 u32 *cmd;
309
310 cmd = &wl->buffer_cmd;
311
312 *cmd = 0;
313 *cmd |= WSPI_CMD_WRITE;
314 *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH;
315 *cmd |= addr & WSPI_CMD_BYTE_ADDR;
316
317 if (fixed)
318 *cmd |= WSPI_CMD_FIXED;
319
320 spi_message_init(&m);
321 memset(t, 0, sizeof(t));
322
323 t[0].tx_buf = cmd;
324 t[0].len = sizeof(*cmd);
325 spi_message_add_tail(&t[0], &m);
326
327 t[1].tx_buf = buf;
328 t[1].len = len;
329 spi_message_add_tail(&t[1], &m);
330
331 spi_sync(wl->spi, &m);
332
333 wl12xx_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd));
334 wl12xx_dump(DEBUG_SPI, "spi_write buf -> ", buf, len);
335}
336
337void wl12xx_spi_mem_read(struct wl12xx *wl, int addr, void *buf,
338 size_t len)
339{
340 int physical;
341
342 physical = wl12xx_translate_mem_addr(wl, addr);
343
344 wl12xx_spi_read(wl, physical, buf, len, false);
345}
346
347void wl12xx_spi_mem_write(struct wl12xx *wl, int addr, void *buf,
348 size_t len)
349{
350 int physical;
351
352 physical = wl12xx_translate_mem_addr(wl, addr);
353
354 wl12xx_spi_write(wl, physical, buf, len, false);
355}
356
357void wl12xx_spi_reg_read(struct wl12xx *wl, int addr, void *buf, size_t len,
358 bool fixed)
359{
360 int physical;
361
362 physical = wl12xx_translate_reg_addr(wl, addr);
363
364 wl12xx_spi_read(wl, physical, buf, len, fixed);
365}
366
367void wl12xx_spi_reg_write(struct wl12xx *wl, int addr, void *buf, size_t len,
368 bool fixed)
369{
370 int physical;
371
372 physical = wl12xx_translate_reg_addr(wl, addr);
373
374 wl12xx_spi_write(wl, physical, buf, len, fixed);
375}
376
377u32 wl12xx_mem_read32(struct wl12xx *wl, int addr)
378{
379 return wl12xx_read32(wl, wl12xx_translate_mem_addr(wl, addr));
380}
381
382void wl12xx_mem_write32(struct wl12xx *wl, int addr, u32 val)
383{
384 wl12xx_write32(wl, wl12xx_translate_mem_addr(wl, addr), val);
385}
386
387u32 wl12xx_reg_read32(struct wl12xx *wl, int addr)
388{
389 return wl12xx_read32(wl, wl12xx_translate_reg_addr(wl, addr));
390}
391
392void wl12xx_reg_write32(struct wl12xx *wl, int addr, u32 val)
393{
394 wl12xx_write32(wl, wl12xx_translate_reg_addr(wl, addr), val);
395}
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