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319afbf9 US |
1 | /* |
2 | * smssdio.c - Siano 1xxx SDIO interface driver | |
3 | * | |
4 | * Copyright 2008 Pierre Ossman | |
5 | * | |
6 | * Based on code by Siano Mobile Silicon, Inc., | |
7 | * Copyright (C) 2006-2008, Uri Shkolnik | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or (at | |
12 | * your option) any later version. | |
13 | * | |
14 | * | |
15 | * This hardware is a bit odd in that all transfers should be done | |
16 | * to/from the SMSSDIO_DATA register, yet the "increase address" bit | |
17 | * always needs to be set. | |
18 | * | |
19 | * Also, buffers from the card are always aligned to 128 byte | |
20 | * boundaries. | |
21 | */ | |
22 | ||
23 | /* | |
24 | * General cleanup notes: | |
25 | * | |
26 | * - only typedefs should be name *_t | |
27 | * | |
28 | * - use ERR_PTR and friends for smscore_register_device() | |
29 | * | |
30 | * - smscore_getbuffer should zero fields | |
31 | * | |
32 | * Fix stop command | |
33 | */ | |
34 | ||
35 | #include <linux/moduleparam.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
319afbf9 US |
37 | #include <linux/firmware.h> |
38 | #include <linux/delay.h> | |
39 | #include <linux/mmc/card.h> | |
40 | #include <linux/mmc/sdio_func.h> | |
41 | #include <linux/mmc/sdio_ids.h> | |
42 | ||
43 | #include "smscoreapi.h" | |
44 | #include "sms-cards.h" | |
45 | ||
46 | /* Registers */ | |
47 | ||
48 | #define SMSSDIO_DATA 0x00 | |
49 | #define SMSSDIO_INT 0x04 | |
ef2d12ce | 50 | #define SMSSDIO_BLOCK_SIZE 128 |
319afbf9 | 51 | |
2184dda0 | 52 | static const struct sdio_device_id smssdio_ids[] __devinitconst = { |
319afbf9 US |
53 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_STELLAR), |
54 | .driver_data = SMS1XXX_BOARD_SIANO_STELLAR}, | |
55 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_A0), | |
56 | .driver_data = SMS1XXX_BOARD_SIANO_NOVA_A}, | |
57 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_B0), | |
58 | .driver_data = SMS1XXX_BOARD_SIANO_NOVA_B}, | |
59 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VEGA_A0), | |
60 | .driver_data = SMS1XXX_BOARD_SIANO_VEGA}, | |
61 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VENICE), | |
62 | .driver_data = SMS1XXX_BOARD_SIANO_VEGA}, | |
63 | { /* end: all zeroes */ }, | |
64 | }; | |
65 | ||
66 | MODULE_DEVICE_TABLE(sdio, smssdio_ids); | |
67 | ||
68 | struct smssdio_device { | |
69 | struct sdio_func *func; | |
70 | ||
71 | struct smscore_device_t *coredev; | |
72 | ||
73 | struct smscore_buffer_t *split_cb; | |
74 | }; | |
75 | ||
76 | /*******************************************************************/ | |
77 | /* Siano core callbacks */ | |
78 | /*******************************************************************/ | |
79 | ||
80 | static int smssdio_sendrequest(void *context, void *buffer, size_t size) | |
81 | { | |
f58d7856 | 82 | int ret = 0; |
319afbf9 US |
83 | struct smssdio_device *smsdev; |
84 | ||
85 | smsdev = context; | |
86 | ||
87 | sdio_claim_host(smsdev->func); | |
88 | ||
89 | while (size >= smsdev->func->cur_blksize) { | |
ef2d12ce UA |
90 | ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA, |
91 | buffer, smsdev->func->cur_blksize); | |
319afbf9 US |
92 | if (ret) |
93 | goto out; | |
94 | ||
95 | buffer += smsdev->func->cur_blksize; | |
96 | size -= smsdev->func->cur_blksize; | |
97 | } | |
98 | ||
99 | if (size) { | |
ef2d12ce UA |
100 | ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA, |
101 | buffer, size); | |
319afbf9 US |
102 | } |
103 | ||
104 | out: | |
105 | sdio_release_host(smsdev->func); | |
106 | ||
107 | return ret; | |
108 | } | |
109 | ||
110 | /*******************************************************************/ | |
111 | /* SDIO callbacks */ | |
112 | /*******************************************************************/ | |
113 | ||
114 | static void smssdio_interrupt(struct sdio_func *func) | |
115 | { | |
116 | int ret, isr; | |
117 | ||
118 | struct smssdio_device *smsdev; | |
119 | struct smscore_buffer_t *cb; | |
120 | struct SmsMsgHdr_ST *hdr; | |
121 | size_t size; | |
122 | ||
123 | smsdev = sdio_get_drvdata(func); | |
124 | ||
125 | /* | |
126 | * The interrupt register has no defined meaning. It is just | |
127 | * a way of turning of the level triggered interrupt. | |
128 | */ | |
129 | isr = sdio_readb(func, SMSSDIO_INT, &ret); | |
130 | if (ret) { | |
ef2d12ce | 131 | sms_err("Unable to read interrupt register!\n"); |
319afbf9 US |
132 | return; |
133 | } | |
134 | ||
135 | if (smsdev->split_cb == NULL) { | |
136 | cb = smscore_getbuffer(smsdev->coredev); | |
137 | if (!cb) { | |
ef2d12ce | 138 | sms_err("Unable to allocate data buffer!\n"); |
319afbf9 US |
139 | return; |
140 | } | |
141 | ||
ef2d12ce UA |
142 | ret = sdio_memcpy_fromio(smsdev->func, |
143 | cb->p, | |
144 | SMSSDIO_DATA, | |
145 | SMSSDIO_BLOCK_SIZE); | |
319afbf9 | 146 | if (ret) { |
ef2d12ce | 147 | sms_err("Error %d reading initial block!\n", ret); |
319afbf9 US |
148 | return; |
149 | } | |
150 | ||
151 | hdr = cb->p; | |
152 | ||
153 | if (hdr->msgFlags & MSG_HDR_FLAG_SPLIT_MSG) { | |
154 | smsdev->split_cb = cb; | |
155 | return; | |
156 | } | |
157 | ||
ef2d12ce UA |
158 | if (hdr->msgLength > smsdev->func->cur_blksize) |
159 | size = hdr->msgLength - smsdev->func->cur_blksize; | |
160 | else | |
161 | size = 0; | |
319afbf9 US |
162 | } else { |
163 | cb = smsdev->split_cb; | |
164 | hdr = cb->p; | |
165 | ||
166 | size = hdr->msgLength - sizeof(struct SmsMsgHdr_ST); | |
167 | ||
168 | smsdev->split_cb = NULL; | |
169 | } | |
170 | ||
ef2d12ce | 171 | if (size) { |
319afbf9 US |
172 | void *buffer; |
173 | ||
ef2d12ce UA |
174 | buffer = cb->p + (hdr->msgLength - size); |
175 | size = ALIGN(size, SMSSDIO_BLOCK_SIZE); | |
319afbf9 | 176 | |
ef2d12ce | 177 | BUG_ON(smsdev->func->cur_blksize != SMSSDIO_BLOCK_SIZE); |
319afbf9 US |
178 | |
179 | /* | |
180 | * First attempt to transfer all of it in one go... | |
181 | */ | |
ef2d12ce UA |
182 | ret = sdio_memcpy_fromio(smsdev->func, |
183 | buffer, | |
184 | SMSSDIO_DATA, | |
185 | size); | |
319afbf9 US |
186 | if (ret && ret != -EINVAL) { |
187 | smscore_putbuffer(smsdev->coredev, cb); | |
ef2d12ce | 188 | sms_err("Error %d reading data from card!\n", ret); |
319afbf9 US |
189 | return; |
190 | } | |
191 | ||
192 | /* | |
193 | * ..then fall back to one block at a time if that is | |
194 | * not possible... | |
195 | * | |
196 | * (we have to do this manually because of the | |
197 | * problem with the "increase address" bit) | |
198 | */ | |
199 | if (ret == -EINVAL) { | |
200 | while (size) { | |
ef2d12ce UA |
201 | ret = sdio_memcpy_fromio(smsdev->func, |
202 | buffer, SMSSDIO_DATA, | |
203 | smsdev->func->cur_blksize); | |
319afbf9 US |
204 | if (ret) { |
205 | smscore_putbuffer(smsdev->coredev, cb); | |
ef2d12ce | 206 | sms_err("Error %d reading " |
319afbf9 US |
207 | "data from card!\n", ret); |
208 | return; | |
209 | } | |
210 | ||
211 | buffer += smsdev->func->cur_blksize; | |
212 | if (size > smsdev->func->cur_blksize) | |
213 | size -= smsdev->func->cur_blksize; | |
214 | else | |
215 | size = 0; | |
216 | } | |
217 | } | |
218 | } | |
219 | ||
220 | cb->size = hdr->msgLength; | |
221 | cb->offset = 0; | |
222 | ||
223 | smscore_onresponse(smsdev->coredev, cb); | |
224 | } | |
225 | ||
2184dda0 | 226 | static int __devinit smssdio_probe(struct sdio_func *func, |
319afbf9 US |
227 | const struct sdio_device_id *id) |
228 | { | |
229 | int ret; | |
230 | ||
231 | int board_id; | |
232 | struct smssdio_device *smsdev; | |
233 | struct smsdevice_params_t params; | |
234 | ||
235 | board_id = id->driver_data; | |
236 | ||
237 | smsdev = kzalloc(sizeof(struct smssdio_device), GFP_KERNEL); | |
238 | if (!smsdev) | |
239 | return -ENOMEM; | |
240 | ||
241 | smsdev->func = func; | |
242 | ||
243 | memset(¶ms, 0, sizeof(struct smsdevice_params_t)); | |
244 | ||
245 | params.device = &func->dev; | |
246 | params.buffer_size = 0x5000; /* ?? */ | |
247 | params.num_buffers = 22; /* ?? */ | |
248 | params.context = smsdev; | |
249 | ||
250 | snprintf(params.devpath, sizeof(params.devpath), | |
251 | "sdio\\%s", sdio_func_id(func)); | |
252 | ||
253 | params.sendrequest_handler = smssdio_sendrequest; | |
254 | ||
255 | params.device_type = sms_get_board(board_id)->type; | |
256 | ||
257 | if (params.device_type != SMS_STELLAR) | |
258 | params.flags |= SMS_DEVICE_FAMILY2; | |
259 | else { | |
260 | /* | |
261 | * FIXME: Stellar needs special handling... | |
262 | */ | |
263 | ret = -ENODEV; | |
264 | goto free; | |
265 | } | |
266 | ||
267 | ret = smscore_register_device(¶ms, &smsdev->coredev); | |
268 | if (ret < 0) | |
269 | goto free; | |
270 | ||
271 | smscore_set_board_id(smsdev->coredev, board_id); | |
272 | ||
273 | sdio_claim_host(func); | |
274 | ||
275 | ret = sdio_enable_func(func); | |
276 | if (ret) | |
277 | goto release; | |
278 | ||
ef2d12ce | 279 | ret = sdio_set_block_size(func, SMSSDIO_BLOCK_SIZE); |
319afbf9 US |
280 | if (ret) |
281 | goto disable; | |
282 | ||
283 | ret = sdio_claim_irq(func, smssdio_interrupt); | |
284 | if (ret) | |
285 | goto disable; | |
286 | ||
287 | sdio_set_drvdata(func, smsdev); | |
288 | ||
289 | sdio_release_host(func); | |
290 | ||
291 | ret = smscore_start_device(smsdev->coredev); | |
292 | if (ret < 0) | |
293 | goto reclaim; | |
294 | ||
295 | return 0; | |
296 | ||
297 | reclaim: | |
298 | sdio_claim_host(func); | |
299 | sdio_release_irq(func); | |
300 | disable: | |
301 | sdio_disable_func(func); | |
302 | release: | |
303 | sdio_release_host(func); | |
304 | smscore_unregister_device(smsdev->coredev); | |
305 | free: | |
306 | kfree(smsdev); | |
307 | ||
308 | return ret; | |
309 | } | |
310 | ||
311 | static void smssdio_remove(struct sdio_func *func) | |
312 | { | |
313 | struct smssdio_device *smsdev; | |
314 | ||
315 | smsdev = sdio_get_drvdata(func); | |
316 | ||
317 | /* FIXME: racy! */ | |
318 | if (smsdev->split_cb) | |
319 | smscore_putbuffer(smsdev->coredev, smsdev->split_cb); | |
320 | ||
321 | smscore_unregister_device(smsdev->coredev); | |
322 | ||
323 | sdio_claim_host(func); | |
324 | sdio_release_irq(func); | |
325 | sdio_disable_func(func); | |
326 | sdio_release_host(func); | |
327 | ||
328 | kfree(smsdev); | |
329 | } | |
330 | ||
331 | static struct sdio_driver smssdio_driver = { | |
332 | .name = "smssdio", | |
333 | .id_table = smssdio_ids, | |
334 | .probe = smssdio_probe, | |
335 | .remove = smssdio_remove, | |
336 | }; | |
337 | ||
338 | /*******************************************************************/ | |
339 | /* Module functions */ | |
340 | /*******************************************************************/ | |
341 | ||
2184dda0 | 342 | static int __init smssdio_module_init(void) |
319afbf9 US |
343 | { |
344 | int ret = 0; | |
345 | ||
346 | printk(KERN_INFO "smssdio: Siano SMS1xxx SDIO driver\n"); | |
347 | printk(KERN_INFO "smssdio: Copyright Pierre Ossman\n"); | |
348 | ||
349 | ret = sdio_register_driver(&smssdio_driver); | |
350 | ||
351 | return ret; | |
352 | } | |
353 | ||
2184dda0 | 354 | static void __exit smssdio_module_exit(void) |
319afbf9 US |
355 | { |
356 | sdio_unregister_driver(&smssdio_driver); | |
357 | } | |
358 | ||
db9582a1 US |
359 | module_init(smssdio_module_init); |
360 | module_exit(smssdio_module_exit); | |
361 | ||
319afbf9 US |
362 | MODULE_DESCRIPTION("Siano SMS1xxx SDIO driver"); |
363 | MODULE_AUTHOR("Pierre Ossman"); | |
364 | MODULE_LICENSE("GPL"); |