Alex Dubov | 4020f2d | 2006-10-04 02:15:37 -0700 | [diff] [blame] | 1 | /* |
| 2 | * tifm_7xx1.c - TI FlashMedia driver |
| 3 | * |
| 4 | * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/tifm.h> |
| 13 | #include <linux/dma-mapping.h> |
| 14 | |
| 15 | #define DRIVER_NAME "tifm_7xx1" |
| 16 | #define DRIVER_VERSION "0.6" |
| 17 | |
| 18 | static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock) |
| 19 | { |
| 20 | int cnt; |
| 21 | unsigned long flags; |
| 22 | |
| 23 | spin_lock_irqsave(&fm->lock, flags); |
| 24 | if (!fm->inhibit_new_cards) { |
| 25 | for (cnt = 0; cnt < fm->max_sockets; cnt++) { |
| 26 | if (fm->sockets[cnt] == sock) { |
| 27 | fm->remove_mask |= (1 << cnt); |
| 28 | queue_work(fm->wq, &fm->media_remover); |
| 29 | break; |
| 30 | } |
| 31 | } |
| 32 | } |
| 33 | spin_unlock_irqrestore(&fm->lock, flags); |
| 34 | } |
| 35 | |
| 36 | static void tifm_7xx1_remove_media(void *adapter) |
| 37 | { |
| 38 | struct tifm_adapter *fm = adapter; |
| 39 | unsigned long flags; |
| 40 | int cnt; |
| 41 | struct tifm_dev *sock; |
| 42 | |
| 43 | if (!class_device_get(&fm->cdev)) |
| 44 | return; |
| 45 | spin_lock_irqsave(&fm->lock, flags); |
| 46 | for (cnt = 0; cnt < fm->max_sockets; cnt++) { |
| 47 | if (fm->sockets[cnt] && (fm->remove_mask & (1 << cnt))) { |
| 48 | printk(KERN_INFO DRIVER_NAME |
| 49 | ": demand removing card from socket %d\n", cnt); |
| 50 | sock = fm->sockets[cnt]; |
| 51 | fm->sockets[cnt] = 0; |
| 52 | fm->remove_mask &= ~(1 << cnt); |
| 53 | |
| 54 | writel(0x0e00, sock->addr + SOCK_CONTROL); |
| 55 | |
| 56 | writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt, |
| 57 | fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 58 | writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt, |
| 59 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 60 | |
| 61 | spin_unlock_irqrestore(&fm->lock, flags); |
| 62 | device_unregister(&sock->dev); |
| 63 | spin_lock_irqsave(&fm->lock, flags); |
| 64 | } |
| 65 | } |
| 66 | spin_unlock_irqrestore(&fm->lock, flags); |
| 67 | class_device_put(&fm->cdev); |
| 68 | } |
| 69 | |
| 70 | static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id, struct pt_regs *regs) |
| 71 | { |
| 72 | struct tifm_adapter *fm = dev_id; |
| 73 | unsigned int irq_status; |
| 74 | unsigned int sock_irq_status, cnt; |
| 75 | |
| 76 | spin_lock(&fm->lock); |
| 77 | irq_status = readl(fm->addr + FM_INTERRUPT_STATUS); |
| 78 | if (irq_status == 0 || irq_status == (~0)) { |
| 79 | spin_unlock(&fm->lock); |
| 80 | return IRQ_NONE; |
| 81 | } |
| 82 | |
| 83 | if (irq_status & TIFM_IRQ_ENABLE) { |
| 84 | writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 85 | |
| 86 | for (cnt = 0; cnt < fm->max_sockets; cnt++) { |
| 87 | sock_irq_status = (irq_status >> cnt) & |
| 88 | (TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK); |
| 89 | |
| 90 | if (fm->sockets[cnt]) { |
| 91 | if (sock_irq_status && |
| 92 | fm->sockets[cnt]->signal_irq) |
| 93 | sock_irq_status = fm->sockets[cnt]-> |
| 94 | signal_irq(fm->sockets[cnt], |
| 95 | sock_irq_status); |
| 96 | |
| 97 | if (irq_status & (1 << cnt)) |
| 98 | fm->remove_mask |= 1 << cnt; |
| 99 | } else { |
| 100 | if (irq_status & (1 << cnt)) |
| 101 | fm->insert_mask |= 1 << cnt; |
| 102 | } |
| 103 | } |
| 104 | } |
| 105 | writel(irq_status, fm->addr + FM_INTERRUPT_STATUS); |
| 106 | |
| 107 | if (!fm->inhibit_new_cards) { |
| 108 | if (!fm->remove_mask && !fm->insert_mask) { |
| 109 | writel(TIFM_IRQ_ENABLE, |
| 110 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 111 | } else { |
| 112 | queue_work(fm->wq, &fm->media_remover); |
| 113 | queue_work(fm->wq, &fm->media_inserter); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | spin_unlock(&fm->lock); |
| 118 | return IRQ_HANDLED; |
| 119 | } |
| 120 | |
| 121 | static tifm_media_id tifm_7xx1_toggle_sock_power(char *sock_addr, int is_x2) |
| 122 | { |
| 123 | unsigned int s_state; |
| 124 | int cnt; |
| 125 | |
| 126 | writel(0x0e00, sock_addr + SOCK_CONTROL); |
| 127 | |
| 128 | for (cnt = 0; cnt < 100; cnt++) { |
| 129 | if (!(TIFM_SOCK_STATE_POWERED & |
| 130 | readl(sock_addr + SOCK_PRESENT_STATE))) |
| 131 | break; |
| 132 | msleep(10); |
| 133 | } |
| 134 | |
| 135 | s_state = readl(sock_addr + SOCK_PRESENT_STATE); |
| 136 | if (!(TIFM_SOCK_STATE_OCCUPIED & s_state)) |
| 137 | return FM_NULL; |
| 138 | |
| 139 | if (is_x2) { |
| 140 | writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL); |
| 141 | } else { |
| 142 | // SmartMedia cards need extra 40 msec |
| 143 | if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1) |
| 144 | msleep(40); |
| 145 | writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED, |
| 146 | sock_addr + SOCK_CONTROL); |
| 147 | msleep(10); |
| 148 | writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED, |
| 149 | sock_addr + SOCK_CONTROL); |
| 150 | } |
| 151 | |
| 152 | for (cnt = 0; cnt < 100; cnt++) { |
| 153 | if ((TIFM_SOCK_STATE_POWERED & |
| 154 | readl(sock_addr + SOCK_PRESENT_STATE))) |
| 155 | break; |
| 156 | msleep(10); |
| 157 | } |
| 158 | |
| 159 | if (!is_x2) |
| 160 | writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED), |
| 161 | sock_addr + SOCK_CONTROL); |
| 162 | |
| 163 | return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7; |
| 164 | } |
| 165 | |
| 166 | inline static char *tifm_7xx1_sock_addr(char *base_addr, unsigned int sock_num) |
| 167 | { |
| 168 | return base_addr + ((sock_num + 1) << 10); |
| 169 | } |
| 170 | |
| 171 | static void tifm_7xx1_insert_media(void *adapter) |
| 172 | { |
| 173 | struct tifm_adapter *fm = adapter; |
| 174 | unsigned long flags; |
| 175 | tifm_media_id media_id; |
| 176 | char *card_name = "xx"; |
| 177 | int cnt, ok_to_register; |
| 178 | unsigned int insert_mask; |
| 179 | struct tifm_dev *new_sock = 0; |
| 180 | |
| 181 | if (!class_device_get(&fm->cdev)) |
| 182 | return; |
| 183 | spin_lock_irqsave(&fm->lock, flags); |
| 184 | insert_mask = fm->insert_mask; |
| 185 | fm->insert_mask = 0; |
| 186 | if (fm->inhibit_new_cards) { |
| 187 | spin_unlock_irqrestore(&fm->lock, flags); |
| 188 | class_device_put(&fm->cdev); |
| 189 | return; |
| 190 | } |
| 191 | spin_unlock_irqrestore(&fm->lock, flags); |
| 192 | |
| 193 | for (cnt = 0; cnt < fm->max_sockets; cnt++) { |
| 194 | if (!(insert_mask & (1 << cnt))) |
| 195 | continue; |
| 196 | |
| 197 | media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt), |
| 198 | fm->max_sockets == 2); |
| 199 | if (media_id) { |
| 200 | ok_to_register = 0; |
| 201 | new_sock = tifm_alloc_device(fm, cnt); |
| 202 | if (new_sock) { |
| 203 | new_sock->addr = tifm_7xx1_sock_addr(fm->addr, |
| 204 | cnt); |
| 205 | new_sock->media_id = media_id; |
| 206 | switch (media_id) { |
| 207 | case 1: |
| 208 | card_name = "xd"; |
| 209 | break; |
| 210 | case 2: |
| 211 | card_name = "ms"; |
| 212 | break; |
| 213 | case 3: |
| 214 | card_name = "sd"; |
| 215 | break; |
| 216 | default: |
| 217 | break; |
| 218 | } |
| 219 | snprintf(new_sock->dev.bus_id, BUS_ID_SIZE, |
| 220 | "tifm_%s%u:%u", card_name, fm->id, cnt); |
| 221 | printk(KERN_INFO DRIVER_NAME |
| 222 | ": %s card detected in socket %d\n", |
| 223 | card_name, cnt); |
| 224 | spin_lock_irqsave(&fm->lock, flags); |
| 225 | if (!fm->sockets[cnt]) { |
| 226 | fm->sockets[cnt] = new_sock; |
| 227 | ok_to_register = 1; |
| 228 | } |
| 229 | spin_unlock_irqrestore(&fm->lock, flags); |
| 230 | if (!ok_to_register || |
| 231 | device_register(&new_sock->dev)) { |
| 232 | spin_lock_irqsave(&fm->lock, flags); |
| 233 | fm->sockets[cnt] = 0; |
| 234 | spin_unlock_irqrestore(&fm->lock, |
| 235 | flags); |
| 236 | tifm_free_device(&new_sock->dev); |
| 237 | } |
| 238 | } |
| 239 | } |
| 240 | writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt, |
| 241 | fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 242 | writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt, |
| 243 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 244 | } |
| 245 | |
| 246 | writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 247 | class_device_put(&fm->cdev); |
| 248 | } |
| 249 | |
| 250 | static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state) |
| 251 | { |
| 252 | struct tifm_adapter *fm = pci_get_drvdata(dev); |
| 253 | unsigned long flags; |
| 254 | |
| 255 | spin_lock_irqsave(&fm->lock, flags); |
| 256 | fm->inhibit_new_cards = 1; |
| 257 | fm->remove_mask = 0xf; |
| 258 | fm->insert_mask = 0; |
| 259 | writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 260 | spin_unlock_irqrestore(&fm->lock, flags); |
| 261 | flush_workqueue(fm->wq); |
| 262 | |
| 263 | tifm_7xx1_remove_media(fm); |
| 264 | |
| 265 | pci_set_power_state(dev, PCI_D3hot); |
| 266 | pci_disable_device(dev); |
| 267 | pci_save_state(dev); |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | static int tifm_7xx1_resume(struct pci_dev *dev) |
| 272 | { |
| 273 | struct tifm_adapter *fm = pci_get_drvdata(dev); |
| 274 | unsigned long flags; |
| 275 | |
| 276 | pci_restore_state(dev); |
| 277 | pci_enable_device(dev); |
| 278 | pci_set_power_state(dev, PCI_D0); |
| 279 | pci_set_master(dev); |
| 280 | |
| 281 | spin_lock_irqsave(&fm->lock, flags); |
| 282 | fm->inhibit_new_cards = 0; |
| 283 | writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS); |
| 284 | writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 285 | writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK, |
| 286 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 287 | fm->insert_mask = 0xf; |
| 288 | spin_unlock_irqrestore(&fm->lock, flags); |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | static int tifm_7xx1_probe(struct pci_dev *dev, |
| 293 | const struct pci_device_id *dev_id) |
| 294 | { |
| 295 | struct tifm_adapter *fm; |
| 296 | int pci_dev_busy = 0; |
| 297 | int rc; |
| 298 | |
| 299 | rc = pci_set_dma_mask(dev, DMA_32BIT_MASK); |
| 300 | if (rc) |
| 301 | return rc; |
| 302 | |
| 303 | rc = pci_enable_device(dev); |
| 304 | if (rc) |
| 305 | return rc; |
| 306 | |
| 307 | pci_set_master(dev); |
| 308 | |
| 309 | rc = pci_request_regions(dev, DRIVER_NAME); |
| 310 | if (rc) { |
| 311 | pci_dev_busy = 1; |
| 312 | goto err_out; |
| 313 | } |
| 314 | |
| 315 | pci_intx(dev, 1); |
| 316 | |
| 317 | fm = tifm_alloc_adapter(); |
| 318 | if (!fm) { |
| 319 | rc = -ENOMEM; |
| 320 | goto err_out_int; |
| 321 | } |
| 322 | |
| 323 | fm->dev = &dev->dev; |
| 324 | fm->max_sockets = (dev->device == 0x803B) ? 2 : 4; |
| 325 | fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets, |
| 326 | GFP_KERNEL); |
| 327 | if (!fm->sockets) |
| 328 | goto err_out_free; |
| 329 | |
| 330 | INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media, fm); |
| 331 | INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media, fm); |
| 332 | fm->eject = tifm_7xx1_eject; |
| 333 | pci_set_drvdata(dev, fm); |
| 334 | |
| 335 | fm->addr = ioremap(pci_resource_start(dev, 0), |
| 336 | pci_resource_len(dev, 0)); |
| 337 | if (!fm->addr) |
| 338 | goto err_out_free; |
| 339 | |
| 340 | rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm); |
| 341 | if (rc) |
| 342 | goto err_out_unmap; |
| 343 | |
| 344 | rc = tifm_add_adapter(fm); |
| 345 | if (rc) |
| 346 | goto err_out_irq; |
| 347 | |
| 348 | writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 349 | writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK, |
| 350 | fm->addr + FM_SET_INTERRUPT_ENABLE); |
| 351 | |
| 352 | fm->insert_mask = 0xf; |
| 353 | |
| 354 | return 0; |
| 355 | |
| 356 | err_out_irq: |
| 357 | free_irq(dev->irq, fm); |
| 358 | err_out_unmap: |
| 359 | iounmap(fm->addr); |
| 360 | err_out_free: |
| 361 | pci_set_drvdata(dev, NULL); |
| 362 | tifm_free_adapter(fm); |
| 363 | err_out_int: |
| 364 | pci_intx(dev, 0); |
| 365 | pci_release_regions(dev); |
| 366 | err_out: |
| 367 | if (!pci_dev_busy) |
| 368 | pci_disable_device(dev); |
| 369 | return rc; |
| 370 | } |
| 371 | |
| 372 | static void tifm_7xx1_remove(struct pci_dev *dev) |
| 373 | { |
| 374 | struct tifm_adapter *fm = pci_get_drvdata(dev); |
| 375 | unsigned long flags; |
| 376 | |
| 377 | spin_lock_irqsave(&fm->lock, flags); |
| 378 | fm->inhibit_new_cards = 1; |
| 379 | fm->remove_mask = 0xf; |
| 380 | fm->insert_mask = 0; |
| 381 | writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 382 | spin_unlock_irqrestore(&fm->lock, flags); |
| 383 | |
| 384 | flush_workqueue(fm->wq); |
| 385 | |
| 386 | tifm_7xx1_remove_media(fm); |
| 387 | |
| 388 | writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE); |
| 389 | free_irq(dev->irq, fm); |
| 390 | |
| 391 | tifm_remove_adapter(fm); |
| 392 | |
| 393 | pci_set_drvdata(dev, 0); |
| 394 | |
| 395 | iounmap(fm->addr); |
| 396 | pci_intx(dev, 0); |
| 397 | pci_release_regions(dev); |
| 398 | |
| 399 | pci_disable_device(dev); |
| 400 | tifm_free_adapter(fm); |
| 401 | } |
| 402 | |
| 403 | static struct pci_device_id tifm_7xx1_pci_tbl [] = { |
| 404 | { PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| 405 | 0 }, /* xx21 - the one I have */ |
| 406 | { PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0, |
| 407 | 0 }, /* xx12 - should be also supported */ |
| 408 | { } |
| 409 | }; |
| 410 | |
| 411 | static struct pci_driver tifm_7xx1_driver = { |
| 412 | .name = DRIVER_NAME, |
| 413 | .id_table = tifm_7xx1_pci_tbl, |
| 414 | .probe = tifm_7xx1_probe, |
| 415 | .remove = tifm_7xx1_remove, |
| 416 | .suspend = tifm_7xx1_suspend, |
| 417 | .resume = tifm_7xx1_resume, |
| 418 | }; |
| 419 | |
| 420 | static int __init tifm_7xx1_init(void) |
| 421 | { |
| 422 | return pci_register_driver(&tifm_7xx1_driver); |
| 423 | } |
| 424 | |
| 425 | static void __exit tifm_7xx1_exit(void) |
| 426 | { |
| 427 | pci_unregister_driver(&tifm_7xx1_driver); |
| 428 | } |
| 429 | |
| 430 | MODULE_AUTHOR("Alex Dubov"); |
| 431 | MODULE_DESCRIPTION("TI FlashMedia host driver"); |
| 432 | MODULE_LICENSE("GPL"); |
| 433 | MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl); |
| 434 | MODULE_VERSION(DRIVER_VERSION); |
| 435 | |
| 436 | module_init(tifm_7xx1_init); |
| 437 | module_exit(tifm_7xx1_exit); |