1 /* 2 * This file is part of wl1271 3 * 4 * Copyright (C) 2009-2010 Nokia Corporation 5 * 6 * Contact: Luciano Coelho <luciano.coelho@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/irq.h> 25 #include <linux/module.h> 26 #include <linux/vmalloc.h> 27 #include <linux/platform_device.h> 28 #include <linux/mmc/sdio.h> 29 #include <linux/mmc/sdio_func.h> 30 #include <linux/mmc/sdio_ids.h> 31 #include <linux/mmc/card.h> 32 #include <linux/mmc/host.h> 33 #include <linux/gpio.h> 34 #include <linux/pm_runtime.h> 35 #include <linux/printk.h> 36 #include <linux/of.h> 37 #include <linux/of_irq.h> 38 39 #include "wlcore.h" 40 #include "wl12xx_80211.h" 41 #include "io.h" 42 43 #ifndef SDIO_VENDOR_ID_TI 44 #define SDIO_VENDOR_ID_TI 0x0097 45 #endif 46 47 #ifndef SDIO_DEVICE_ID_TI_WL1271 48 #define SDIO_DEVICE_ID_TI_WL1271 0x4076 49 #endif 50 51 static bool dump = false; 52 53 struct wl12xx_sdio_glue { 54 struct device *dev; 55 struct platform_device *core; 56 }; 57 58 static const struct sdio_device_id wl1271_devices[] = { 59 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) }, 60 {} 61 }; 62 MODULE_DEVICE_TABLE(sdio, wl1271_devices); 63 64 static void wl1271_sdio_set_block_size(struct device *child, 65 unsigned int blksz) 66 { 67 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); 68 struct sdio_func *func = dev_to_sdio_func(glue->dev); 69 70 sdio_claim_host(func); 71 sdio_set_block_size(func, blksz); 72 sdio_release_host(func); 73 } 74 75 static int __must_check wl12xx_sdio_raw_read(struct device *child, int addr, 76 void *buf, size_t len, bool fixed) 77 { 78 int ret; 79 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); 80 struct sdio_func *func = dev_to_sdio_func(glue->dev); 81 82 sdio_claim_host(func); 83 84 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) { 85 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret); 86 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n", 87 addr, ((u8 *)buf)[0]); 88 } else { 89 if (fixed) 90 ret = sdio_readsb(func, buf, addr, len); 91 else 92 ret = sdio_memcpy_fromio(func, buf, addr, len); 93 94 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n", 95 addr, len); 96 } 97 98 sdio_release_host(func); 99 100 if (WARN_ON(ret)) 101 dev_err(child->parent, "sdio read failed (%d)\n", ret); 102 103 if (unlikely(dump)) { 104 printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr); 105 print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ", 106 DUMP_PREFIX_OFFSET, 16, 1, 107 buf, len, false); 108 } 109 110 return ret; 111 } 112 113 static int __must_check wl12xx_sdio_raw_write(struct device *child, int addr, 114 void *buf, size_t len, bool fixed) 115 { 116 int ret; 117 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); 118 struct sdio_func *func = dev_to_sdio_func(glue->dev); 119 120 sdio_claim_host(func); 121 122 if (unlikely(dump)) { 123 printk(KERN_DEBUG "wlcore_sdio: WRITE to 0x%04x\n", addr); 124 print_hex_dump(KERN_DEBUG, "wlcore_sdio: WRITE ", 125 DUMP_PREFIX_OFFSET, 16, 1, 126 buf, len, false); 127 } 128 129 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) { 130 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret); 131 dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n", 132 addr, ((u8 *)buf)[0]); 133 } else { 134 dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n", 135 addr, len); 136 137 if (fixed) 138 ret = sdio_writesb(func, addr, buf, len); 139 else 140 ret = sdio_memcpy_toio(func, addr, buf, len); 141 } 142 143 sdio_release_host(func); 144 145 if (WARN_ON(ret)) 146 dev_err(child->parent, "sdio write failed (%d)\n", ret); 147 148 return ret; 149 } 150 151 static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue) 152 { 153 int ret; 154 struct sdio_func *func = dev_to_sdio_func(glue->dev); 155 struct mmc_card *card = func->card; 156 157 ret = pm_runtime_get_sync(&card->dev); 158 if (ret < 0) { 159 pm_runtime_put_noidle(&card->dev); 160 dev_err(glue->dev, "%s: failed to get_sync(%d)\n", 161 __func__, ret); 162 goto out; 163 } 164 165 sdio_claim_host(func); 166 sdio_enable_func(func); 167 sdio_release_host(func); 168 169 out: 170 return ret; 171 } 172 173 static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue) 174 { 175 struct sdio_func *func = dev_to_sdio_func(glue->dev); 176 struct mmc_card *card = func->card; 177 178 sdio_claim_host(func); 179 sdio_disable_func(func); 180 sdio_release_host(func); 181 182 /* Let runtime PM know the card is powered off */ 183 return pm_runtime_put_sync(&card->dev); 184 } 185 186 static int wl12xx_sdio_set_power(struct device *child, bool enable) 187 { 188 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); 189 190 if (enable) 191 return wl12xx_sdio_power_on(glue); 192 else 193 return wl12xx_sdio_power_off(glue); 194 } 195 196 static struct wl1271_if_operations sdio_ops = { 197 .read = wl12xx_sdio_raw_read, 198 .write = wl12xx_sdio_raw_write, 199 .power = wl12xx_sdio_set_power, 200 .set_block_size = wl1271_sdio_set_block_size, 201 }; 202 203 #ifdef CONFIG_OF 204 205 static const struct wilink_family_data wl127x_data = { 206 .name = "wl127x", 207 .nvs_name = "ti-connectivity/wl127x-nvs.bin", 208 }; 209 210 static const struct wilink_family_data wl128x_data = { 211 .name = "wl128x", 212 .nvs_name = "ti-connectivity/wl128x-nvs.bin", 213 }; 214 215 static const struct wilink_family_data wl18xx_data = { 216 .name = "wl18xx", 217 .cfg_name = "ti-connectivity/wl18xx-conf.bin", 218 .nvs_name = "ti-connectivity/wl1271-nvs.bin", 219 }; 220 221 static const struct of_device_id wlcore_sdio_of_match_table[] = { 222 { .compatible = "ti,wl1271", .data = &wl127x_data }, 223 { .compatible = "ti,wl1273", .data = &wl127x_data }, 224 { .compatible = "ti,wl1281", .data = &wl128x_data }, 225 { .compatible = "ti,wl1283", .data = &wl128x_data }, 226 { .compatible = "ti,wl1285", .data = &wl128x_data }, 227 { .compatible = "ti,wl1801", .data = &wl18xx_data }, 228 { .compatible = "ti,wl1805", .data = &wl18xx_data }, 229 { .compatible = "ti,wl1807", .data = &wl18xx_data }, 230 { .compatible = "ti,wl1831", .data = &wl18xx_data }, 231 { .compatible = "ti,wl1835", .data = &wl18xx_data }, 232 { .compatible = "ti,wl1837", .data = &wl18xx_data }, 233 { } 234 }; 235 236 static int wlcore_probe_of(struct device *dev, int *irq, 237 struct wlcore_platdev_data *pdev_data) 238 { 239 struct device_node *np = dev->of_node; 240 const struct of_device_id *of_id; 241 242 of_id = of_match_node(wlcore_sdio_of_match_table, np); 243 if (!of_id) 244 return -ENODEV; 245 246 pdev_data->family = of_id->data; 247 248 *irq = irq_of_parse_and_map(np, 0); 249 if (!*irq) { 250 dev_err(dev, "No irq in platform data\n"); 251 return -EINVAL; 252 } 253 254 /* optional clock frequency params */ 255 of_property_read_u32(np, "ref-clock-frequency", 256 &pdev_data->ref_clock_freq); 257 of_property_read_u32(np, "tcxo-clock-frequency", 258 &pdev_data->tcxo_clock_freq); 259 260 return 0; 261 } 262 #else 263 static int wlcore_probe_of(struct device *dev, int *irq, 264 struct wlcore_platdev_data *pdev_data) 265 { 266 return -ENODATA; 267 } 268 #endif 269 270 static int wl1271_probe(struct sdio_func *func, 271 const struct sdio_device_id *id) 272 { 273 struct wlcore_platdev_data *pdev_data; 274 struct wl12xx_sdio_glue *glue; 275 struct resource res[1]; 276 mmc_pm_flag_t mmcflags; 277 int ret = -ENOMEM; 278 int irq; 279 const char *chip_family; 280 281 /* We are only able to handle the wlan function */ 282 if (func->num != 0x02) 283 return -ENODEV; 284 285 pdev_data = devm_kzalloc(&func->dev, sizeof(*pdev_data), GFP_KERNEL); 286 if (!pdev_data) 287 return -ENOMEM; 288 289 pdev_data->if_ops = &sdio_ops; 290 291 glue = devm_kzalloc(&func->dev, sizeof(*glue), GFP_KERNEL); 292 if (!glue) 293 return -ENOMEM; 294 295 glue->dev = &func->dev; 296 297 /* Grab access to FN0 for ELP reg. */ 298 func->card->quirks |= MMC_QUIRK_LENIENT_FN0; 299 300 /* Use block mode for transferring over one block size of data */ 301 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE; 302 303 ret = wlcore_probe_of(&func->dev, &irq, pdev_data); 304 if (ret) 305 goto out; 306 307 /* if sdio can keep power while host is suspended, enable wow */ 308 mmcflags = sdio_get_host_pm_caps(func); 309 dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags); 310 311 if (mmcflags & MMC_PM_KEEP_POWER) 312 pdev_data->pwr_in_suspend = true; 313 314 sdio_set_drvdata(func, glue); 315 316 /* Tell PM core that we don't need the card to be powered now */ 317 pm_runtime_put_noidle(&func->dev); 318 319 /* 320 * Due to a hardware bug, we can't differentiate wl18xx from 321 * wl12xx, because both report the same device ID. The only 322 * way to differentiate is by checking the SDIO revision, 323 * which is 3.00 on the wl18xx chips. 324 */ 325 if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00) 326 chip_family = "wl18xx"; 327 else 328 chip_family = "wl12xx"; 329 330 glue->core = platform_device_alloc(chip_family, PLATFORM_DEVID_AUTO); 331 if (!glue->core) { 332 dev_err(glue->dev, "can't allocate platform_device"); 333 ret = -ENOMEM; 334 goto out; 335 } 336 337 glue->core->dev.parent = &func->dev; 338 339 memset(res, 0x00, sizeof(res)); 340 341 res[0].start = irq; 342 res[0].flags = IORESOURCE_IRQ | 343 irqd_get_trigger_type(irq_get_irq_data(irq)); 344 res[0].name = "irq"; 345 346 ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res)); 347 if (ret) { 348 dev_err(glue->dev, "can't add resources\n"); 349 goto out_dev_put; 350 } 351 352 ret = platform_device_add_data(glue->core, pdev_data, 353 sizeof(*pdev_data)); 354 if (ret) { 355 dev_err(glue->dev, "can't add platform data\n"); 356 goto out_dev_put; 357 } 358 359 ret = platform_device_add(glue->core); 360 if (ret) { 361 dev_err(glue->dev, "can't add platform device\n"); 362 goto out_dev_put; 363 } 364 return 0; 365 366 out_dev_put: 367 platform_device_put(glue->core); 368 369 out: 370 return ret; 371 } 372 373 static void wl1271_remove(struct sdio_func *func) 374 { 375 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func); 376 377 /* Undo decrement done above in wl1271_probe */ 378 pm_runtime_get_noresume(&func->dev); 379 380 platform_device_unregister(glue->core); 381 } 382 383 #ifdef CONFIG_PM 384 static int wl1271_suspend(struct device *dev) 385 { 386 /* Tell MMC/SDIO core it's OK to power down the card 387 * (if it isn't already), but not to remove it completely */ 388 struct sdio_func *func = dev_to_sdio_func(dev); 389 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func); 390 struct wl1271 *wl = platform_get_drvdata(glue->core); 391 mmc_pm_flag_t sdio_flags; 392 int ret = 0; 393 394 dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n", 395 wl->wow_enabled); 396 397 /* check whether sdio should keep power */ 398 if (wl->wow_enabled) { 399 sdio_flags = sdio_get_host_pm_caps(func); 400 401 if (!(sdio_flags & MMC_PM_KEEP_POWER)) { 402 dev_err(dev, "can't keep power while host " 403 "is suspended\n"); 404 ret = -EINVAL; 405 goto out; 406 } 407 408 /* keep power while host suspended */ 409 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 410 if (ret) { 411 dev_err(dev, "error while trying to keep power\n"); 412 goto out; 413 } 414 } 415 out: 416 return ret; 417 } 418 419 static int wl1271_resume(struct device *dev) 420 { 421 dev_dbg(dev, "wl1271 resume\n"); 422 423 return 0; 424 } 425 426 static const struct dev_pm_ops wl1271_sdio_pm_ops = { 427 .suspend = wl1271_suspend, 428 .resume = wl1271_resume, 429 }; 430 #endif 431 432 static struct sdio_driver wl1271_sdio_driver = { 433 .name = "wl1271_sdio", 434 .id_table = wl1271_devices, 435 .probe = wl1271_probe, 436 .remove = wl1271_remove, 437 #ifdef CONFIG_PM 438 .drv = { 439 .pm = &wl1271_sdio_pm_ops, 440 }, 441 #endif 442 }; 443 444 static int __init wl1271_init(void) 445 { 446 return sdio_register_driver(&wl1271_sdio_driver); 447 } 448 449 static void __exit wl1271_exit(void) 450 { 451 sdio_unregister_driver(&wl1271_sdio_driver); 452 } 453 454 module_init(wl1271_init); 455 module_exit(wl1271_exit); 456 457 module_param(dump, bool, 0600); 458 MODULE_PARM_DESC(dump, "Enable sdio read/write dumps."); 459 460 MODULE_LICENSE("GPL"); 461 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>"); 462 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>"); 463