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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> | |
7a707b89 | 42 | #include <linux/module.h> |
319afbf9 US |
43 | |
44 | #include "smscoreapi.h" | |
45 | #include "sms-cards.h" | |
46 | ||
47 | /* Registers */ | |
48 | ||
49 | #define SMSSDIO_DATA 0x00 | |
50 | #define SMSSDIO_INT 0x04 | |
ef2d12ce | 51 | #define SMSSDIO_BLOCK_SIZE 128 |
319afbf9 | 52 | |
4c62e976 | 53 | static const struct sdio_device_id smssdio_ids[] = { |
319afbf9 US |
54 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_STELLAR), |
55 | .driver_data = SMS1XXX_BOARD_SIANO_STELLAR}, | |
56 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_A0), | |
57 | .driver_data = SMS1XXX_BOARD_SIANO_NOVA_A}, | |
58 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_B0), | |
59 | .driver_data = SMS1XXX_BOARD_SIANO_NOVA_B}, | |
60 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VEGA_A0), | |
61 | .driver_data = SMS1XXX_BOARD_SIANO_VEGA}, | |
62 | {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VENICE), | |
63 | .driver_data = SMS1XXX_BOARD_SIANO_VEGA}, | |
64 | { /* end: all zeroes */ }, | |
65 | }; | |
66 | ||
67 | MODULE_DEVICE_TABLE(sdio, smssdio_ids); | |
68 | ||
69 | struct smssdio_device { | |
70 | struct sdio_func *func; | |
71 | ||
72 | struct smscore_device_t *coredev; | |
73 | ||
74 | struct smscore_buffer_t *split_cb; | |
75 | }; | |
76 | ||
77 | /*******************************************************************/ | |
78 | /* Siano core callbacks */ | |
79 | /*******************************************************************/ | |
80 | ||
81 | static int smssdio_sendrequest(void *context, void *buffer, size_t size) | |
82 | { | |
f58d7856 | 83 | int ret = 0; |
319afbf9 US |
84 | struct smssdio_device *smsdev; |
85 | ||
86 | smsdev = context; | |
87 | ||
88 | sdio_claim_host(smsdev->func); | |
89 | ||
90 | while (size >= smsdev->func->cur_blksize) { | |
ef2d12ce UA |
91 | ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA, |
92 | buffer, smsdev->func->cur_blksize); | |
319afbf9 US |
93 | if (ret) |
94 | goto out; | |
95 | ||
96 | buffer += smsdev->func->cur_blksize; | |
97 | size -= smsdev->func->cur_blksize; | |
98 | } | |
99 | ||
100 | if (size) { | |
ef2d12ce UA |
101 | ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA, |
102 | buffer, size); | |
319afbf9 US |
103 | } |
104 | ||
105 | out: | |
106 | sdio_release_host(smsdev->func); | |
107 | ||
108 | return ret; | |
109 | } | |
110 | ||
111 | /*******************************************************************/ | |
112 | /* SDIO callbacks */ | |
113 | /*******************************************************************/ | |
114 | ||
115 | static void smssdio_interrupt(struct sdio_func *func) | |
116 | { | |
fdf07b02 | 117 | int ret; |
319afbf9 US |
118 | |
119 | struct smssdio_device *smsdev; | |
120 | struct smscore_buffer_t *cb; | |
121 | struct SmsMsgHdr_ST *hdr; | |
122 | size_t size; | |
123 | ||
124 | smsdev = sdio_get_drvdata(func); | |
125 | ||
126 | /* | |
127 | * The interrupt register has no defined meaning. It is just | |
128 | * a way of turning of the level triggered interrupt. | |
129 | */ | |
fdf07b02 | 130 | (void)sdio_readb(func, SMSSDIO_INT, &ret); |
319afbf9 | 131 | if (ret) { |
ef2d12ce | 132 | sms_err("Unable to read interrupt register!\n"); |
319afbf9 US |
133 | return; |
134 | } | |
135 | ||
136 | if (smsdev->split_cb == NULL) { | |
137 | cb = smscore_getbuffer(smsdev->coredev); | |
138 | if (!cb) { | |
ef2d12ce | 139 | sms_err("Unable to allocate data buffer!\n"); |
319afbf9 US |
140 | return; |
141 | } | |
142 | ||
ef2d12ce UA |
143 | ret = sdio_memcpy_fromio(smsdev->func, |
144 | cb->p, | |
145 | SMSSDIO_DATA, | |
146 | SMSSDIO_BLOCK_SIZE); | |
319afbf9 | 147 | if (ret) { |
ef2d12ce | 148 | sms_err("Error %d reading initial block!\n", ret); |
319afbf9 US |
149 | return; |
150 | } | |
151 | ||
152 | hdr = cb->p; | |
153 | ||
154 | if (hdr->msgFlags & MSG_HDR_FLAG_SPLIT_MSG) { | |
155 | smsdev->split_cb = cb; | |
156 | return; | |
157 | } | |
158 | ||
ef2d12ce UA |
159 | if (hdr->msgLength > smsdev->func->cur_blksize) |
160 | size = hdr->msgLength - smsdev->func->cur_blksize; | |
161 | else | |
162 | size = 0; | |
319afbf9 US |
163 | } else { |
164 | cb = smsdev->split_cb; | |
165 | hdr = cb->p; | |
166 | ||
167 | size = hdr->msgLength - sizeof(struct SmsMsgHdr_ST); | |
168 | ||
169 | smsdev->split_cb = NULL; | |
170 | } | |
171 | ||
ef2d12ce | 172 | if (size) { |
319afbf9 US |
173 | void *buffer; |
174 | ||
ef2d12ce UA |
175 | buffer = cb->p + (hdr->msgLength - size); |
176 | size = ALIGN(size, SMSSDIO_BLOCK_SIZE); | |
319afbf9 | 177 | |
ef2d12ce | 178 | BUG_ON(smsdev->func->cur_blksize != SMSSDIO_BLOCK_SIZE); |
319afbf9 US |
179 | |
180 | /* | |
181 | * First attempt to transfer all of it in one go... | |
182 | */ | |
ef2d12ce UA |
183 | ret = sdio_memcpy_fromio(smsdev->func, |
184 | buffer, | |
185 | SMSSDIO_DATA, | |
186 | size); | |
319afbf9 US |
187 | if (ret && ret != -EINVAL) { |
188 | smscore_putbuffer(smsdev->coredev, cb); | |
ef2d12ce | 189 | sms_err("Error %d reading data from card!\n", ret); |
319afbf9 US |
190 | return; |
191 | } | |
192 | ||
193 | /* | |
194 | * ..then fall back to one block at a time if that is | |
195 | * not possible... | |
196 | * | |
197 | * (we have to do this manually because of the | |
198 | * problem with the "increase address" bit) | |
199 | */ | |
200 | if (ret == -EINVAL) { | |
201 | while (size) { | |
ef2d12ce UA |
202 | ret = sdio_memcpy_fromio(smsdev->func, |
203 | buffer, SMSSDIO_DATA, | |
204 | smsdev->func->cur_blksize); | |
319afbf9 US |
205 | if (ret) { |
206 | smscore_putbuffer(smsdev->coredev, cb); | |
ef2d12ce | 207 | sms_err("Error %d reading " |
319afbf9 US |
208 | "data from card!\n", ret); |
209 | return; | |
210 | } | |
211 | ||
212 | buffer += smsdev->func->cur_blksize; | |
213 | if (size > smsdev->func->cur_blksize) | |
214 | size -= smsdev->func->cur_blksize; | |
215 | else | |
216 | size = 0; | |
217 | } | |
218 | } | |
219 | } | |
220 | ||
221 | cb->size = hdr->msgLength; | |
222 | cb->offset = 0; | |
223 | ||
224 | smscore_onresponse(smsdev->coredev, cb); | |
225 | } | |
226 | ||
4c62e976 | 227 | static int smssdio_probe(struct sdio_func *func, |
319afbf9 US |
228 | const struct sdio_device_id *id) |
229 | { | |
230 | int ret; | |
231 | ||
232 | int board_id; | |
233 | struct smssdio_device *smsdev; | |
234 | struct smsdevice_params_t params; | |
235 | ||
236 | board_id = id->driver_data; | |
237 | ||
238 | smsdev = kzalloc(sizeof(struct smssdio_device), GFP_KERNEL); | |
239 | if (!smsdev) | |
240 | return -ENOMEM; | |
241 | ||
242 | smsdev->func = func; | |
243 | ||
244 | memset(¶ms, 0, sizeof(struct smsdevice_params_t)); | |
245 | ||
246 | params.device = &func->dev; | |
247 | params.buffer_size = 0x5000; /* ?? */ | |
248 | params.num_buffers = 22; /* ?? */ | |
249 | params.context = smsdev; | |
250 | ||
251 | snprintf(params.devpath, sizeof(params.devpath), | |
252 | "sdio\\%s", sdio_func_id(func)); | |
253 | ||
254 | params.sendrequest_handler = smssdio_sendrequest; | |
255 | ||
256 | params.device_type = sms_get_board(board_id)->type; | |
257 | ||
258 | if (params.device_type != SMS_STELLAR) | |
259 | params.flags |= SMS_DEVICE_FAMILY2; | |
260 | else { | |
261 | /* | |
262 | * FIXME: Stellar needs special handling... | |
263 | */ | |
264 | ret = -ENODEV; | |
265 | goto free; | |
266 | } | |
267 | ||
268 | ret = smscore_register_device(¶ms, &smsdev->coredev); | |
269 | if (ret < 0) | |
270 | goto free; | |
271 | ||
272 | smscore_set_board_id(smsdev->coredev, board_id); | |
273 | ||
274 | sdio_claim_host(func); | |
275 | ||
276 | ret = sdio_enable_func(func); | |
277 | if (ret) | |
278 | goto release; | |
279 | ||
ef2d12ce | 280 | ret = sdio_set_block_size(func, SMSSDIO_BLOCK_SIZE); |
319afbf9 US |
281 | if (ret) |
282 | goto disable; | |
283 | ||
284 | ret = sdio_claim_irq(func, smssdio_interrupt); | |
285 | if (ret) | |
286 | goto disable; | |
287 | ||
288 | sdio_set_drvdata(func, smsdev); | |
289 | ||
290 | sdio_release_host(func); | |
291 | ||
292 | ret = smscore_start_device(smsdev->coredev); | |
293 | if (ret < 0) | |
294 | goto reclaim; | |
295 | ||
296 | return 0; | |
297 | ||
298 | reclaim: | |
299 | sdio_claim_host(func); | |
300 | sdio_release_irq(func); | |
301 | disable: | |
302 | sdio_disable_func(func); | |
303 | release: | |
304 | sdio_release_host(func); | |
305 | smscore_unregister_device(smsdev->coredev); | |
306 | free: | |
307 | kfree(smsdev); | |
308 | ||
309 | return ret; | |
310 | } | |
311 | ||
312 | static void smssdio_remove(struct sdio_func *func) | |
313 | { | |
314 | struct smssdio_device *smsdev; | |
315 | ||
316 | smsdev = sdio_get_drvdata(func); | |
317 | ||
318 | /* FIXME: racy! */ | |
319 | if (smsdev->split_cb) | |
320 | smscore_putbuffer(smsdev->coredev, smsdev->split_cb); | |
321 | ||
322 | smscore_unregister_device(smsdev->coredev); | |
323 | ||
324 | sdio_claim_host(func); | |
325 | sdio_release_irq(func); | |
326 | sdio_disable_func(func); | |
327 | sdio_release_host(func); | |
328 | ||
329 | kfree(smsdev); | |
330 | } | |
331 | ||
332 | static struct sdio_driver smssdio_driver = { | |
333 | .name = "smssdio", | |
334 | .id_table = smssdio_ids, | |
335 | .probe = smssdio_probe, | |
336 | .remove = smssdio_remove, | |
337 | }; | |
338 | ||
339 | /*******************************************************************/ | |
340 | /* Module functions */ | |
341 | /*******************************************************************/ | |
342 | ||
2184dda0 | 343 | static int __init smssdio_module_init(void) |
319afbf9 US |
344 | { |
345 | int ret = 0; | |
346 | ||
347 | printk(KERN_INFO "smssdio: Siano SMS1xxx SDIO driver\n"); | |
348 | printk(KERN_INFO "smssdio: Copyright Pierre Ossman\n"); | |
349 | ||
350 | ret = sdio_register_driver(&smssdio_driver); | |
351 | ||
352 | return ret; | |
353 | } | |
354 | ||
2184dda0 | 355 | static void __exit smssdio_module_exit(void) |
319afbf9 US |
356 | { |
357 | sdio_unregister_driver(&smssdio_driver); | |
358 | } | |
359 | ||
db9582a1 US |
360 | module_init(smssdio_module_init); |
361 | module_exit(smssdio_module_exit); | |
362 | ||
319afbf9 US |
363 | MODULE_DESCRIPTION("Siano SMS1xxx SDIO driver"); |
364 | MODULE_AUTHOR("Pierre Ossman"); | |
365 | MODULE_LICENSE("GPL"); |