Commit | Line | Data |
---|---|---|
2f01a1f5 | 1 | /* |
80301cdc | 2 | * This file is part of wl1251 |
2f01a1f5 KV |
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 | ||
8e639c06 | 24 | #include <linux/irq.h> |
2f01a1f5 | 25 | #include <linux/module.h> |
5a0e3ad6 | 26 | #include <linux/slab.h> |
2f01a1f5 KV |
27 | #include <linux/crc7.h> |
28 | #include <linux/spi/spi.h> | |
8e639c06 | 29 | #include <linux/spi/wl12xx.h> |
2f01a1f5 | 30 | |
13674118 | 31 | #include "wl1251.h" |
29d904c4 | 32 | #include "wl1251_reg.h" |
ef2f8d45 | 33 | #include "wl1251_spi.h" |
2f01a1f5 | 34 | |
b5ed9c1b BC |
35 | static irqreturn_t wl1251_irq(int irq, void *cookie) |
36 | { | |
37 | struct wl1251 *wl; | |
38 | ||
39 | wl1251_debug(DEBUG_IRQ, "IRQ"); | |
40 | ||
41 | wl = cookie; | |
42 | ||
16e711f9 | 43 | ieee80211_queue_work(wl->hw, &wl->irq_work); |
b5ed9c1b BC |
44 | |
45 | return IRQ_HANDLED; | |
46 | } | |
47 | ||
af8c78eb BC |
48 | static struct spi_device *wl_to_spi(struct wl1251 *wl) |
49 | { | |
50 | return wl->if_priv; | |
51 | } | |
52 | ||
08d9f572 | 53 | static void wl1251_spi_reset(struct wl1251 *wl) |
2f01a1f5 KV |
54 | { |
55 | u8 *cmd; | |
56 | struct spi_transfer t; | |
57 | struct spi_message m; | |
58 | ||
59 | cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL); | |
60 | if (!cmd) { | |
80301cdc | 61 | wl1251_error("could not allocate cmd for spi reset"); |
2f01a1f5 KV |
62 | return; |
63 | } | |
64 | ||
65 | memset(&t, 0, sizeof(t)); | |
66 | spi_message_init(&m); | |
67 | ||
68 | memset(cmd, 0xff, WSPI_INIT_CMD_LEN); | |
69 | ||
70 | t.tx_buf = cmd; | |
71 | t.len = WSPI_INIT_CMD_LEN; | |
72 | spi_message_add_tail(&t, &m); | |
73 | ||
af8c78eb | 74 | spi_sync(wl_to_spi(wl), &m); |
2f01a1f5 | 75 | |
80301cdc | 76 | wl1251_dump(DEBUG_SPI, "spi reset -> ", cmd, WSPI_INIT_CMD_LEN); |
2f01a1f5 KV |
77 | } |
78 | ||
8e639c06 | 79 | static void wl1251_spi_wake(struct wl1251 *wl) |
2f01a1f5 KV |
80 | { |
81 | u8 crc[WSPI_INIT_CMD_CRC_LEN], *cmd; | |
82 | struct spi_transfer t; | |
83 | struct spi_message m; | |
84 | ||
85 | cmd = kzalloc(WSPI_INIT_CMD_LEN, GFP_KERNEL); | |
86 | if (!cmd) { | |
80301cdc | 87 | wl1251_error("could not allocate cmd for spi init"); |
2f01a1f5 KV |
88 | return; |
89 | } | |
90 | ||
91 | memset(crc, 0, sizeof(crc)); | |
92 | memset(&t, 0, sizeof(t)); | |
93 | spi_message_init(&m); | |
94 | ||
95 | /* | |
96 | * Set WSPI_INIT_COMMAND | |
97 | * the data is being send from the MSB to LSB | |
98 | */ | |
99 | cmd[2] = 0xff; | |
100 | cmd[3] = 0xff; | |
101 | cmd[1] = WSPI_INIT_CMD_START | WSPI_INIT_CMD_TX; | |
102 | cmd[0] = 0; | |
103 | cmd[7] = 0; | |
104 | cmd[6] |= HW_ACCESS_WSPI_INIT_CMD_MASK << 3; | |
105 | cmd[6] |= HW_ACCESS_WSPI_FIXED_BUSY_LEN & WSPI_INIT_CMD_FIXEDBUSY_LEN; | |
106 | ||
107 | if (HW_ACCESS_WSPI_FIXED_BUSY_LEN == 0) | |
108 | cmd[5] |= WSPI_INIT_CMD_DIS_FIXEDBUSY; | |
109 | else | |
110 | cmd[5] |= WSPI_INIT_CMD_EN_FIXEDBUSY; | |
111 | ||
112 | cmd[5] |= WSPI_INIT_CMD_IOD | WSPI_INIT_CMD_IP | WSPI_INIT_CMD_CS | |
113 | | WSPI_INIT_CMD_WSPI | WSPI_INIT_CMD_WS; | |
114 | ||
115 | crc[0] = cmd[1]; | |
116 | crc[1] = cmd[0]; | |
117 | crc[2] = cmd[7]; | |
118 | crc[3] = cmd[6]; | |
119 | crc[4] = cmd[5]; | |
120 | ||
121 | cmd[4] |= crc7(0, crc, WSPI_INIT_CMD_CRC_LEN) << 1; | |
122 | cmd[4] |= WSPI_INIT_CMD_END; | |
123 | ||
124 | t.tx_buf = cmd; | |
125 | t.len = WSPI_INIT_CMD_LEN; | |
126 | spi_message_add_tail(&t, &m); | |
127 | ||
af8c78eb | 128 | spi_sync(wl_to_spi(wl), &m); |
2f01a1f5 | 129 | |
80301cdc | 130 | wl1251_dump(DEBUG_SPI, "spi init -> ", cmd, WSPI_INIT_CMD_LEN); |
2f01a1f5 KV |
131 | } |
132 | ||
08d9f572 BC |
133 | static void wl1251_spi_reset_wake(struct wl1251 *wl) |
134 | { | |
135 | wl1251_spi_reset(wl); | |
8e639c06 | 136 | wl1251_spi_wake(wl); |
08d9f572 BC |
137 | } |
138 | ||
08d9f572 BC |
139 | static void wl1251_spi_read(struct wl1251 *wl, int addr, void *buf, |
140 | size_t len) | |
2f01a1f5 KV |
141 | { |
142 | struct spi_transfer t[3]; | |
143 | struct spi_message m; | |
5262c12d | 144 | u8 *busy_buf; |
56343a3c | 145 | u32 *cmd; |
2f01a1f5 | 146 | |
56343a3c | 147 | cmd = &wl->buffer_cmd; |
5262c12d | 148 | busy_buf = wl->buffer_busyword; |
56343a3c KV |
149 | |
150 | *cmd = 0; | |
151 | *cmd |= WSPI_CMD_READ; | |
152 | *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH; | |
153 | *cmd |= addr & WSPI_CMD_BYTE_ADDR; | |
2f01a1f5 KV |
154 | |
155 | spi_message_init(&m); | |
156 | memset(t, 0, sizeof(t)); | |
157 | ||
56343a3c | 158 | t[0].tx_buf = cmd; |
2f01a1f5 KV |
159 | t[0].len = 4; |
160 | spi_message_add_tail(&t[0], &m); | |
161 | ||
162 | /* Busy and non busy words read */ | |
163 | t[1].rx_buf = busy_buf; | |
80301cdc | 164 | t[1].len = WL1251_BUSY_WORD_LEN; |
2f01a1f5 KV |
165 | spi_message_add_tail(&t[1], &m); |
166 | ||
167 | t[2].rx_buf = buf; | |
168 | t[2].len = len; | |
169 | spi_message_add_tail(&t[2], &m); | |
170 | ||
af8c78eb | 171 | spi_sync(wl_to_spi(wl), &m); |
2f01a1f5 KV |
172 | |
173 | /* FIXME: check busy words */ | |
174 | ||
80301cdc KV |
175 | wl1251_dump(DEBUG_SPI, "spi_read cmd -> ", cmd, sizeof(*cmd)); |
176 | wl1251_dump(DEBUG_SPI, "spi_read buf <- ", buf, len); | |
2f01a1f5 KV |
177 | } |
178 | ||
08d9f572 BC |
179 | static void wl1251_spi_write(struct wl1251 *wl, int addr, void *buf, |
180 | size_t len) | |
2f01a1f5 KV |
181 | { |
182 | struct spi_transfer t[2]; | |
183 | struct spi_message m; | |
56343a3c | 184 | u32 *cmd; |
2f01a1f5 | 185 | |
56343a3c KV |
186 | cmd = &wl->buffer_cmd; |
187 | ||
188 | *cmd = 0; | |
189 | *cmd |= WSPI_CMD_WRITE; | |
190 | *cmd |= (len << WSPI_CMD_BYTE_LENGTH_OFFSET) & WSPI_CMD_BYTE_LENGTH; | |
191 | *cmd |= addr & WSPI_CMD_BYTE_ADDR; | |
2f01a1f5 KV |
192 | |
193 | spi_message_init(&m); | |
194 | memset(t, 0, sizeof(t)); | |
195 | ||
56343a3c KV |
196 | t[0].tx_buf = cmd; |
197 | t[0].len = sizeof(*cmd); | |
2f01a1f5 KV |
198 | spi_message_add_tail(&t[0], &m); |
199 | ||
200 | t[1].tx_buf = buf; | |
201 | t[1].len = len; | |
202 | spi_message_add_tail(&t[1], &m); | |
203 | ||
af8c78eb | 204 | spi_sync(wl_to_spi(wl), &m); |
2f01a1f5 | 205 | |
80301cdc KV |
206 | wl1251_dump(DEBUG_SPI, "spi_write cmd -> ", cmd, sizeof(*cmd)); |
207 | wl1251_dump(DEBUG_SPI, "spi_write buf -> ", buf, len); | |
2f01a1f5 | 208 | } |
08d9f572 | 209 | |
b5ed9c1b BC |
210 | static void wl1251_spi_enable_irq(struct wl1251 *wl) |
211 | { | |
212 | return enable_irq(wl->irq); | |
213 | } | |
214 | ||
215 | static void wl1251_spi_disable_irq(struct wl1251 *wl) | |
216 | { | |
217 | return disable_irq(wl->irq); | |
218 | } | |
219 | ||
af8c78eb | 220 | static const struct wl1251_if_operations wl1251_spi_ops = { |
08d9f572 BC |
221 | .read = wl1251_spi_read, |
222 | .write = wl1251_spi_write, | |
223 | .reset = wl1251_spi_reset_wake, | |
b5ed9c1b BC |
224 | .enable_irq = wl1251_spi_enable_irq, |
225 | .disable_irq = wl1251_spi_disable_irq, | |
08d9f572 | 226 | }; |
8e639c06 BC |
227 | |
228 | static int __devinit wl1251_spi_probe(struct spi_device *spi) | |
229 | { | |
230 | struct wl12xx_platform_data *pdata; | |
231 | struct ieee80211_hw *hw; | |
232 | struct wl1251 *wl; | |
233 | int ret; | |
234 | ||
235 | pdata = spi->dev.platform_data; | |
236 | if (!pdata) { | |
237 | wl1251_error("no platform data"); | |
238 | return -ENODEV; | |
239 | } | |
240 | ||
241 | hw = wl1251_alloc_hw(); | |
242 | if (IS_ERR(hw)) | |
243 | return PTR_ERR(hw); | |
244 | ||
245 | wl = hw->priv; | |
246 | ||
247 | SET_IEEE80211_DEV(hw, &spi->dev); | |
248 | dev_set_drvdata(&spi->dev, wl); | |
af8c78eb | 249 | wl->if_priv = spi; |
8e639c06 BC |
250 | wl->if_ops = &wl1251_spi_ops; |
251 | ||
252 | /* This is the only SPI value that we need to set here, the rest | |
253 | * comes from the board-peripherals file */ | |
254 | spi->bits_per_word = 32; | |
255 | ||
256 | ret = spi_setup(spi); | |
257 | if (ret < 0) { | |
258 | wl1251_error("spi_setup failed"); | |
259 | goto out_free; | |
260 | } | |
261 | ||
262 | wl->set_power = pdata->set_power; | |
263 | if (!wl->set_power) { | |
264 | wl1251_error("set power function missing in platform data"); | |
265 | return -ENODEV; | |
266 | } | |
267 | ||
268 | wl->irq = spi->irq; | |
269 | if (wl->irq < 0) { | |
270 | wl1251_error("irq missing in platform data"); | |
271 | return -ENODEV; | |
272 | } | |
273 | ||
c95cf3d0 DJW |
274 | wl->use_eeprom = pdata->use_eeprom; |
275 | ||
8e639c06 BC |
276 | ret = request_irq(wl->irq, wl1251_irq, 0, DRIVER_NAME, wl); |
277 | if (ret < 0) { | |
278 | wl1251_error("request_irq() failed: %d", ret); | |
279 | goto out_free; | |
280 | } | |
281 | ||
282 | set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING); | |
283 | ||
284 | disable_irq(wl->irq); | |
285 | ||
286 | ret = wl1251_init_ieee80211(wl); | |
287 | if (ret) | |
288 | goto out_irq; | |
289 | ||
290 | return 0; | |
291 | ||
292 | out_irq: | |
293 | free_irq(wl->irq, wl); | |
294 | ||
295 | out_free: | |
296 | ieee80211_free_hw(hw); | |
297 | ||
298 | return ret; | |
299 | } | |
300 | ||
301 | static int __devexit wl1251_spi_remove(struct spi_device *spi) | |
302 | { | |
303 | struct wl1251 *wl = dev_get_drvdata(&spi->dev); | |
304 | ||
b5ed9c1b | 305 | free_irq(wl->irq, wl); |
8e639c06 BC |
306 | wl1251_free_hw(wl); |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | static struct spi_driver wl1251_spi_driver = { | |
312 | .driver = { | |
40f54242 | 313 | .name = "wl1251", |
8e639c06 BC |
314 | .bus = &spi_bus_type, |
315 | .owner = THIS_MODULE, | |
316 | }, | |
317 | ||
318 | .probe = wl1251_spi_probe, | |
319 | .remove = __devexit_p(wl1251_spi_remove), | |
320 | }; | |
321 | ||
322 | static int __init wl1251_spi_init(void) | |
323 | { | |
324 | int ret; | |
325 | ||
326 | ret = spi_register_driver(&wl1251_spi_driver); | |
327 | if (ret < 0) { | |
328 | wl1251_error("failed to register spi driver: %d", ret); | |
329 | goto out; | |
330 | } | |
331 | ||
332 | out: | |
333 | return ret; | |
334 | } | |
335 | ||
336 | static void __exit wl1251_spi_exit(void) | |
337 | { | |
338 | spi_unregister_driver(&wl1251_spi_driver); | |
339 | ||
340 | wl1251_notice("unloaded"); | |
341 | } | |
342 | ||
343 | module_init(wl1251_spi_init); | |
344 | module_exit(wl1251_spi_exit); | |
345 | ||
346 | MODULE_LICENSE("GPL"); | |
b1b0a2b8 | 347 | MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>"); |