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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 | /* * smssdio.c - Siano 1xxx SDIO interface driver * * Copyright 2008 Pierre Ossman * * Based on code by Siano Mobile Silicon, Inc., * Copyright (C) 2006-2008, Uri Shkolnik * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * * This hardware is a bit odd in that all transfers should be done * to/from the SMSSDIO_DATA register, yet the "increase address" bit * always needs to be set. * * Also, buffers from the card are always aligned to 128 byte * boundaries. */ /* * General cleanup notes: * * - only typedefs should be name *_t * * - use ERR_PTR and friends for smscore_register_device() * * - smscore_getbuffer should zero fields * * Fix stop command */ #include <linux/moduleparam.h> #include <linux/slab.h> #include <linux/firmware.h> #include <linux/delay.h> #include <linux/mmc/card.h> #include <linux/mmc/sdio_func.h> #include <linux/mmc/sdio_ids.h> #include <linux/module.h> #include "smscoreapi.h" #include "sms-cards.h" #include "smsendian.h" /* Registers */ #define SMSSDIO_DATA 0x00 #define SMSSDIO_INT 0x04 #define SMSSDIO_BLOCK_SIZE 128 static const struct sdio_device_id smssdio_ids[] = { {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_STELLAR), .driver_data = SMS1XXX_BOARD_SIANO_STELLAR}, {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_A0), .driver_data = SMS1XXX_BOARD_SIANO_NOVA_A}, {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_NOVA_B0), .driver_data = SMS1XXX_BOARD_SIANO_NOVA_B}, {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VEGA_A0), .driver_data = SMS1XXX_BOARD_SIANO_VEGA}, {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, SDIO_DEVICE_ID_SIANO_VENICE), .driver_data = SMS1XXX_BOARD_SIANO_VEGA}, {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x302), .driver_data = SMS1XXX_BOARD_SIANO_MING}, {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x500), .driver_data = SMS1XXX_BOARD_SIANO_PELE}, {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x600), .driver_data = SMS1XXX_BOARD_SIANO_RIO}, {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x700), .driver_data = SMS1XXX_BOARD_SIANO_DENVER_2160}, {SDIO_DEVICE(SDIO_VENDOR_ID_SIANO, 0x800), .driver_data = SMS1XXX_BOARD_SIANO_DENVER_1530}, { /* end: all zeroes */ }, }; MODULE_DEVICE_TABLE(sdio, smssdio_ids); struct smssdio_device { struct sdio_func *func; struct smscore_device_t *coredev; struct smscore_buffer_t *split_cb; }; /*******************************************************************/ /* Siano core callbacks */ /*******************************************************************/ static int smssdio_sendrequest(void *context, void *buffer, size_t size) { int ret = 0; struct smssdio_device *smsdev; smsdev = context; sdio_claim_host(smsdev->func); smsendian_handle_tx_message((struct sms_msg_data *) buffer); while (size >= smsdev->func->cur_blksize) { ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA, buffer, smsdev->func->cur_blksize); if (ret) goto out; buffer += smsdev->func->cur_blksize; size -= smsdev->func->cur_blksize; } if (size) { ret = sdio_memcpy_toio(smsdev->func, SMSSDIO_DATA, buffer, size); } out: sdio_release_host(smsdev->func); return ret; } /*******************************************************************/ /* SDIO callbacks */ /*******************************************************************/ static void smssdio_interrupt(struct sdio_func *func) { int ret; struct smssdio_device *smsdev; struct smscore_buffer_t *cb; struct sms_msg_hdr *hdr; size_t size; smsdev = sdio_get_drvdata(func); /* * The interrupt register has no defined meaning. It is just * a way of turning of the level triggered interrupt. */ (void)sdio_readb(func, SMSSDIO_INT, &ret); if (ret) { sms_err("Unable to read interrupt register!\n"); return; } if (smsdev->split_cb == NULL) { cb = smscore_getbuffer(smsdev->coredev); if (!cb) { sms_err("Unable to allocate data buffer!\n"); return; } ret = sdio_memcpy_fromio(smsdev->func, cb->p, SMSSDIO_DATA, SMSSDIO_BLOCK_SIZE); if (ret) { sms_err("Error %d reading initial block!\n", ret); return; } hdr = cb->p; if (hdr->msg_flags & MSG_HDR_FLAG_SPLIT_MSG) { smsdev->split_cb = cb; return; } if (hdr->msg_length > smsdev->func->cur_blksize) size = hdr->msg_length - smsdev->func->cur_blksize; else size = 0; } else { cb = smsdev->split_cb; hdr = cb->p; size = hdr->msg_length - sizeof(struct sms_msg_hdr); smsdev->split_cb = NULL; } if (size) { void *buffer; buffer = cb->p + (hdr->msg_length - size); size = ALIGN(size, SMSSDIO_BLOCK_SIZE); BUG_ON(smsdev->func->cur_blksize != SMSSDIO_BLOCK_SIZE); /* * First attempt to transfer all of it in one go... */ ret = sdio_memcpy_fromio(smsdev->func, buffer, SMSSDIO_DATA, size); if (ret && ret != -EINVAL) { smscore_putbuffer(smsdev->coredev, cb); sms_err("Error %d reading data from card!\n", ret); return; } /* * ..then fall back to one block at a time if that is * not possible... * * (we have to do this manually because of the * problem with the "increase address" bit) */ if (ret == -EINVAL) { while (size) { ret = sdio_memcpy_fromio(smsdev->func, buffer, SMSSDIO_DATA, smsdev->func->cur_blksize); if (ret) { smscore_putbuffer(smsdev->coredev, cb); sms_err("Error %d reading " "data from card!\n", ret); return; } buffer += smsdev->func->cur_blksize; if (size > smsdev->func->cur_blksize) size -= smsdev->func->cur_blksize; else size = 0; } } } cb->size = hdr->msg_length; cb->offset = 0; smsendian_handle_rx_message((struct sms_msg_data *) cb->p); smscore_onresponse(smsdev->coredev, cb); } static int smssdio_probe(struct sdio_func *func, const struct sdio_device_id *id) { int ret; int board_id; struct smssdio_device *smsdev; struct smsdevice_params_t params; board_id = id->driver_data; smsdev = kzalloc(sizeof(struct smssdio_device), GFP_KERNEL); if (!smsdev) return -ENOMEM; smsdev->func = func; memset(¶ms, 0, sizeof(struct smsdevice_params_t)); params.device = &func->dev; params.buffer_size = 0x5000; /* ?? */ params.num_buffers = 22; /* ?? */ params.context = smsdev; snprintf(params.devpath, sizeof(params.devpath), "sdio\\%s", sdio_func_id(func)); params.sendrequest_handler = smssdio_sendrequest; params.device_type = sms_get_board(board_id)->type; if (params.device_type != SMS_STELLAR) params.flags |= SMS_DEVICE_FAMILY2; else { /* * FIXME: Stellar needs special handling... */ ret = -ENODEV; goto free; } ret = smscore_register_device(¶ms, &smsdev->coredev); if (ret < 0) goto free; smscore_set_board_id(smsdev->coredev, board_id); sdio_claim_host(func); ret = sdio_enable_func(func); if (ret) goto release; ret = sdio_set_block_size(func, SMSSDIO_BLOCK_SIZE); if (ret) goto disable; ret = sdio_claim_irq(func, smssdio_interrupt); if (ret) goto disable; sdio_set_drvdata(func, smsdev); sdio_release_host(func); ret = smscore_start_device(smsdev->coredev); if (ret < 0) goto reclaim; return 0; reclaim: sdio_claim_host(func); sdio_release_irq(func); disable: sdio_disable_func(func); release: sdio_release_host(func); smscore_unregister_device(smsdev->coredev); free: kfree(smsdev); return ret; } static void smssdio_remove(struct sdio_func *func) { struct smssdio_device *smsdev; smsdev = sdio_get_drvdata(func); /* FIXME: racy! */ if (smsdev->split_cb) smscore_putbuffer(smsdev->coredev, smsdev->split_cb); smscore_unregister_device(smsdev->coredev); sdio_claim_host(func); sdio_release_irq(func); sdio_disable_func(func); sdio_release_host(func); kfree(smsdev); } static struct sdio_driver smssdio_driver = { .name = "smssdio", .id_table = smssdio_ids, .probe = smssdio_probe, .remove = smssdio_remove, }; /*******************************************************************/ /* Module functions */ /*******************************************************************/ static int __init smssdio_module_init(void) { int ret = 0; printk(KERN_INFO "smssdio: Siano SMS1xxx SDIO driver\n"); printk(KERN_INFO "smssdio: Copyright Pierre Ossman\n"); ret = sdio_register_driver(&smssdio_driver); return ret; } static void __exit smssdio_module_exit(void) { sdio_unregister_driver(&smssdio_driver); } module_init(smssdio_module_init); module_exit(smssdio_module_exit); MODULE_DESCRIPTION("Siano SMS1xxx SDIO driver"); MODULE_AUTHOR("Pierre Ossman"); MODULE_LICENSE("GPL"); |