1/* 2 * wl12xx SDIO routines 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program; if not, write to the Free Software 15 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 16 * 02110-1301 USA 17 * 18 * Copyright (C) 2005 Texas Instruments Incorporated 19 * Copyright (C) 2008 Google Inc 20 * Copyright (C) 2009 Bob Copeland (me@bobcopeland.com) 21 */ 22#include <linux/module.h> 23#include <linux/mod_devicetable.h> 24#include <linux/mmc/sdio_func.h> 25#include <linux/mmc/sdio_ids.h> 26#include <linux/platform_device.h> 27#include <linux/spi/wl12xx.h> 28#include <linux/irq.h> 29 30#include "wl1251.h" 31 32#ifndef SDIO_VENDOR_ID_TI 33#define SDIO_VENDOR_ID_TI 0x104c 34#endif 35 36#ifndef SDIO_DEVICE_ID_TI_WL1251 37#define SDIO_DEVICE_ID_TI_WL1251 0x9066 38#endif 39 40struct wl1251_sdio { 41 struct sdio_func *func; 42 u32 elp_val; 43}; 44 45static struct wl12xx_platform_data *wl12xx_board_data; 46 47static struct sdio_func *wl_to_func(struct wl1251 *wl) 48{ 49 struct wl1251_sdio *wl_sdio = wl->if_priv; 50 return wl_sdio->func; 51} 52 53static void wl1251_sdio_interrupt(struct sdio_func *func) 54{ 55 struct wl1251 *wl = sdio_get_drvdata(func); 56 57 wl1251_debug(DEBUG_IRQ, "IRQ"); 58 59 ieee80211_queue_work(wl->hw, &wl->irq_work); 60} 61 62static const struct sdio_device_id wl1251_devices[] = { 63 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1251) }, 64 {} 65}; 66MODULE_DEVICE_TABLE(sdio, wl1251_devices); 67 68 69static void wl1251_sdio_read(struct wl1251 *wl, int addr, 70 void *buf, size_t len) 71{ 72 int ret; 73 struct sdio_func *func = wl_to_func(wl); 74 75 sdio_claim_host(func); 76 ret = sdio_memcpy_fromio(func, buf, addr, len); 77 if (ret) 78 wl1251_error("sdio read failed (%d)", ret); 79 sdio_release_host(func); 80} 81 82static void wl1251_sdio_write(struct wl1251 *wl, int addr, 83 void *buf, size_t len) 84{ 85 int ret; 86 struct sdio_func *func = wl_to_func(wl); 87 88 sdio_claim_host(func); 89 ret = sdio_memcpy_toio(func, addr, buf, len); 90 if (ret) 91 wl1251_error("sdio write failed (%d)", ret); 92 sdio_release_host(func); 93} 94 95static void wl1251_sdio_read_elp(struct wl1251 *wl, int addr, u32 *val) 96{ 97 int ret = 0; 98 struct wl1251_sdio *wl_sdio = wl->if_priv; 99 struct sdio_func *func = wl_sdio->func; 100 101 /* 102 * The hardware only supports RAW (read after write) access for 103 * reading, regular sdio_readb won't work here (it interprets 104 * the unused bits of CMD52 as write data even if we send read 105 * request). 106 */ 107 sdio_claim_host(func); 108 *val = sdio_writeb_readb(func, wl_sdio->elp_val, addr, &ret); 109 sdio_release_host(func); 110 111 if (ret) 112 wl1251_error("sdio_readb failed (%d)", ret); 113} 114 115static void wl1251_sdio_write_elp(struct wl1251 *wl, int addr, u32 val) 116{ 117 int ret = 0; 118 struct wl1251_sdio *wl_sdio = wl->if_priv; 119 struct sdio_func *func = wl_sdio->func; 120 121 sdio_claim_host(func); 122 sdio_writeb(func, val, addr, &ret); 123 sdio_release_host(func); 124 125 if (ret) 126 wl1251_error("sdio_writeb failed (%d)", ret); 127 else 128 wl_sdio->elp_val = val; 129} 130 131static void wl1251_sdio_reset(struct wl1251 *wl) 132{ 133} 134 135static void wl1251_sdio_enable_irq(struct wl1251 *wl) 136{ 137 struct sdio_func *func = wl_to_func(wl); 138 139 sdio_claim_host(func); 140 sdio_claim_irq(func, wl1251_sdio_interrupt); 141 sdio_release_host(func); 142} 143 144static void wl1251_sdio_disable_irq(struct wl1251 *wl) 145{ 146 struct sdio_func *func = wl_to_func(wl); 147 148 sdio_claim_host(func); 149 sdio_release_irq(func); 150 sdio_release_host(func); 151} 152 153/* Interrupts when using dedicated WLAN_IRQ pin */ 154static irqreturn_t wl1251_line_irq(int irq, void *cookie) 155{ 156 struct wl1251 *wl = cookie; 157 158 ieee80211_queue_work(wl->hw, &wl->irq_work); 159 160 return IRQ_HANDLED; 161} 162 163static void wl1251_enable_line_irq(struct wl1251 *wl) 164{ 165 return enable_irq(wl->irq); 166} 167 168static void wl1251_disable_line_irq(struct wl1251 *wl) 169{ 170 return disable_irq(wl->irq); 171} 172 173static void wl1251_sdio_set_power(bool enable) 174{ 175} 176 177static struct wl1251_if_operations wl1251_sdio_ops = { 178 .read = wl1251_sdio_read, 179 .write = wl1251_sdio_write, 180 .write_elp = wl1251_sdio_write_elp, 181 .read_elp = wl1251_sdio_read_elp, 182 .reset = wl1251_sdio_reset, 183}; 184 185static int wl1251_platform_probe(struct platform_device *pdev) 186{ 187 if (pdev->id != -1) { 188 wl1251_error("can only handle single device"); 189 return -ENODEV; 190 } 191 192 wl12xx_board_data = pdev->dev.platform_data; 193 return 0; 194} 195 196/* 197 * Dummy platform_driver for passing platform_data to this driver, 198 * until we have a way to pass this through SDIO subsystem or 199 * some other way. 200 */ 201static struct platform_driver wl1251_platform_driver = { 202 .driver = { 203 .name = "wl1251_data", 204 .owner = THIS_MODULE, 205 }, 206 .probe = wl1251_platform_probe, 207}; 208 209static int wl1251_sdio_probe(struct sdio_func *func, 210 const struct sdio_device_id *id) 211{ 212 int ret; 213 struct wl1251 *wl; 214 struct ieee80211_hw *hw; 215 struct wl1251_sdio *wl_sdio; 216 217 hw = wl1251_alloc_hw(); 218 if (IS_ERR(hw)) 219 return PTR_ERR(hw); 220 221 wl = hw->priv; 222 223 wl_sdio = kzalloc(sizeof(*wl_sdio), GFP_KERNEL); 224 if (wl_sdio == NULL) { 225 ret = -ENOMEM; 226 goto out_free_hw; 227 } 228 229 sdio_claim_host(func); 230 ret = sdio_enable_func(func); 231 if (ret) 232 goto release; 233 234 sdio_set_block_size(func, 512); 235 sdio_release_host(func); 236 237 SET_IEEE80211_DEV(hw, &func->dev); 238 wl_sdio->func = func; 239 wl->if_priv = wl_sdio; 240 wl->if_ops = &wl1251_sdio_ops; 241 wl->set_power = wl1251_sdio_set_power; 242 243 if (wl12xx_board_data != NULL) { 244 wl->set_power = wl12xx_board_data->set_power; 245 wl->irq = wl12xx_board_data->irq; 246 wl->use_eeprom = wl12xx_board_data->use_eeprom; 247 } 248 249 if (wl->irq) { 250 ret = request_irq(wl->irq, wl1251_line_irq, 0, "wl1251", wl); 251 if (ret < 0) { 252 wl1251_error("request_irq() failed: %d", ret); 253 goto disable; 254 } 255 256 set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING); 257 disable_irq(wl->irq); 258 259 wl1251_sdio_ops.enable_irq = wl1251_enable_line_irq; 260 wl1251_sdio_ops.disable_irq = wl1251_disable_line_irq; 261 262 wl1251_info("using dedicated interrupt line"); 263 } else { 264 wl1251_sdio_ops.enable_irq = wl1251_sdio_enable_irq; 265 wl1251_sdio_ops.disable_irq = wl1251_sdio_disable_irq; 266 267 wl1251_info("using SDIO interrupt"); 268 } 269 270 ret = wl1251_init_ieee80211(wl); 271 if (ret) 272 goto out_free_irq; 273 274 sdio_set_drvdata(func, wl); 275 return ret; 276 277out_free_irq: 278 if (wl->irq) 279 free_irq(wl->irq, wl); 280disable: 281 sdio_claim_host(func); 282 sdio_disable_func(func); 283release: 284 sdio_release_host(func); 285 kfree(wl_sdio); 286out_free_hw: 287 wl1251_free_hw(wl); 288 return ret; 289} 290 291static void __devexit wl1251_sdio_remove(struct sdio_func *func) 292{ 293 struct wl1251 *wl = sdio_get_drvdata(func); 294 struct wl1251_sdio *wl_sdio = wl->if_priv; 295 296 if (wl->irq) 297 free_irq(wl->irq, wl); 298 kfree(wl_sdio); 299 wl1251_free_hw(wl); 300 301 sdio_claim_host(func); 302 sdio_release_irq(func); 303 sdio_disable_func(func); 304 sdio_release_host(func); 305} 306 307static struct sdio_driver wl1251_sdio_driver = { 308 .name = "wl1251_sdio", 309 .id_table = wl1251_devices, 310 .probe = wl1251_sdio_probe, 311 .remove = __devexit_p(wl1251_sdio_remove), 312}; 313 314static int __init wl1251_sdio_init(void) 315{ 316 int err; 317 318 err = platform_driver_register(&wl1251_platform_driver); 319 if (err) { 320 wl1251_error("failed to register platform driver: %d", err); 321 return err; 322 } 323 324 err = sdio_register_driver(&wl1251_sdio_driver); 325 if (err) 326 wl1251_error("failed to register sdio driver: %d", err); 327 return err; 328} 329 330static void __exit wl1251_sdio_exit(void) 331{ 332 sdio_unregister_driver(&wl1251_sdio_driver); 333 platform_driver_unregister(&wl1251_platform_driver); 334 wl1251_notice("unloaded"); 335} 336 337module_init(wl1251_sdio_init); 338module_exit(wl1251_sdio_exit); 339 340MODULE_LICENSE("GPL"); 341MODULE_AUTHOR("Kalle Valo <kalle.valo@nokia.com>"); 342