drivers/misc/tifm_7xx1.c

   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(struct work_struct *work)
  37 {
  38         struct tifm_adapter *fm =
  39                 container_of(work, struct tifm_adapter, media_remover);
  40         unsigned long flags;
  41         int cnt;
  42         struct tifm_dev *sock;
  43
  44         if (!class_device_get(&fm->cdev))
  45                 return;
  46         spin_lock_irqsave(&fm->lock, flags);
  47         for (cnt = 0; cnt < fm->max_sockets; cnt++) {
  48                 if (fm->sockets[cnt] && (fm->remove_mask & (1 << cnt))) {
  49                         printk(KERN_INFO DRIVER_NAME
  50                                ": demand removing card from socket %d\n", cnt);
  51                         sock = fm->sockets[cnt];
  52                         fm->sockets[cnt] = NULL;
  53                         fm->remove_mask &= ~(1 << cnt);
  54
  55                         writel(0x0e00, sock->addr + SOCK_CONTROL);
  56
  57                         writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
  58                                 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
  59                         writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
  60                                 fm->addr + FM_SET_INTERRUPT_ENABLE);
  61
  62                         spin_unlock_irqrestore(&fm->lock, flags);
  63                         device_unregister(&sock->dev);
  64                         spin_lock_irqsave(&fm->lock, flags);
  65                 }
  66         }
  67         spin_unlock_irqrestore(&fm->lock, flags);
  68         class_device_put(&fm->cdev);
  69 }
  70
  71 static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
  72 {
  73         struct tifm_adapter *fm = dev_id;
  74         unsigned int irq_status;
  75         unsigned int sock_irq_status, cnt;
  76
  77         spin_lock(&fm->lock);
  78         irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
  79         if (irq_status == 0 || irq_status == (~0)) {
  80                 spin_unlock(&fm->lock);
  81                 return IRQ_NONE;
  82         }
  83
  84         if (irq_status & TIFM_IRQ_ENABLE) {
  85                 writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
  86
  87                 for (cnt = 0; cnt <  fm->max_sockets; cnt++) {
  88                         sock_irq_status = (irq_status >> cnt) &
  89                                         (TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK);
  90
  91                         if (fm->sockets[cnt]) {
  92                                 if (sock_irq_status &&
  93                                                 fm->sockets[cnt]->signal_irq)
  94                                         sock_irq_status = fm->sockets[cnt]->
  95                                                 signal_irq(fm->sockets[cnt],
  96                                                         sock_irq_status);
  97
  98                                 if (irq_status & (1 << cnt))
  99                                         fm->remove_mask |= 1 << cnt;
 100                         } else {
 101                                 if (irq_status & (1 << cnt))
 102                                         fm->insert_mask |= 1 << cnt;
 103                         }
 104                 }
 105         }
 106         writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
 107
 108         if (!fm->inhibit_new_cards) {
 109                 if (!fm->remove_mask && !fm->insert_mask) {
 110                         writel(TIFM_IRQ_ENABLE,
 111                                 fm->addr + FM_SET_INTERRUPT_ENABLE);
 112                 } else {
 113                         queue_work(fm->wq, &fm->media_remover);
 114                         queue_work(fm->wq, &fm->media_inserter);
 115                 }
 116         }
 117
 118         spin_unlock(&fm->lock);
 119         return IRQ_HANDLED;
 120 }
 121
 122 static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr, int is_x2)
 123 {
 124         unsigned int s_state;
 125         int cnt;
 126
 127         writel(0x0e00, sock_addr + SOCK_CONTROL);
 128
 129         for (cnt = 0; cnt < 100; cnt++) {
 130                 if (!(TIFM_SOCK_STATE_POWERED &
 131                                 readl(sock_addr + SOCK_PRESENT_STATE)))
 132                         break;
 133                 msleep(10);
 134         }
 135
 136         s_state = readl(sock_addr + SOCK_PRESENT_STATE);
 137         if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
 138                 return FM_NULL;
 139
 140         if (is_x2) {
 141                 writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
 142         } else {
 143                 // SmartMedia cards need extra 40 msec
 144                 if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
 145                         msleep(40);
 146                 writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
 147                        sock_addr + SOCK_CONTROL);
 148                 msleep(10);
 149                 writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
 150                         sock_addr + SOCK_CONTROL);
 151         }
 152
 153         for (cnt = 0; cnt < 100; cnt++) {
 154                 if ((TIFM_SOCK_STATE_POWERED &
 155                                 readl(sock_addr + SOCK_PRESENT_STATE)))
 156                         break;
 157                 msleep(10);
 158         }
 159
 160         if (!is_x2)
 161                 writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
 162                        sock_addr + SOCK_CONTROL);
 163
 164         return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
 165 }
 166
 167 inline static char __iomem *
 168 tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
 169 {
 170         return base_addr + ((sock_num + 1) << 10);
 171 }
 172
 173 static void tifm_7xx1_insert_media(struct work_struct *work)
 174 {
 175         struct tifm_adapter *fm =
 176                 container_of(work, struct tifm_adapter, media_inserter);
 177         unsigned long flags;
 178         tifm_media_id media_id;
 179         char *card_name = "xx";
 180         int cnt, ok_to_register;
 181         unsigned int insert_mask;
 182         struct tifm_dev *new_sock = NULL;
 183
 184         if (!class_device_get(&fm->cdev))
 185                 return;
 186         spin_lock_irqsave(&fm->lock, flags);
 187         insert_mask = fm->insert_mask;
 188         fm->insert_mask = 0;
 189         if (fm->inhibit_new_cards) {
 190                 spin_unlock_irqrestore(&fm->lock, flags);
 191                 class_device_put(&fm->cdev);
 192                 return;
 193         }
 194         spin_unlock_irqrestore(&fm->lock, flags);
 195
 196         for (cnt = 0; cnt < fm->max_sockets; cnt++) {
 197                 if (!(insert_mask & (1 << cnt)))
 198                         continue;
 199
 200                 media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt),
 201                                                        fm->max_sockets == 2);
 202                 if (media_id) {
 203                         ok_to_register = 0;
 204                         new_sock = tifm_alloc_device(fm, cnt);
 205                         if (new_sock) {
 206                                 new_sock->addr = tifm_7xx1_sock_addr(fm->addr,
 207                                                                         cnt);
 208                                 new_sock->media_id = media_id;
 209                                 switch (media_id) {
 210                                 case 1:
 211                                         card_name = "xd";
 212                                         break;
 213                                 case 2:
 214                                         card_name = "ms";
 215                                         break;
 216                                 case 3:
 217                                         card_name = "sd";
 218                                         break;
 219                                 default:
 220                                         break;
 221                                 }
 222                                 snprintf(new_sock->dev.bus_id, BUS_ID_SIZE,
 223                                         "tifm_%s%u:%u", card_name, fm->id, cnt);
 224                                 printk(KERN_INFO DRIVER_NAME
 225                                         ": %s card detected in socket %d\n",
 226                                         card_name, cnt);
 227                                 spin_lock_irqsave(&fm->lock, flags);
 228                                 if (!fm->sockets[cnt]) {
 229                                         fm->sockets[cnt] = new_sock;
 230                                         ok_to_register = 1;
 231                                 }
 232                                 spin_unlock_irqrestore(&fm->lock, flags);
 233                                 if (!ok_to_register ||
 234                                             device_register(&new_sock->dev)) {
 235                                         spin_lock_irqsave(&fm->lock, flags);
 236                                         fm->sockets[cnt] = NULL;
 237                                         spin_unlock_irqrestore(&fm->lock,
 238                                                                 flags);
 239                                         tifm_free_device(&new_sock->dev);
 240                                 }
 241                         }
 242                 }
 243                 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
 244                        fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 245                 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
 246                        fm->addr + FM_SET_INTERRUPT_ENABLE);
 247         }
 248
 249         writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
 250         class_device_put(&fm->cdev);
 251 }
 252
 253 static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
 254 {
 255         struct tifm_adapter *fm = pci_get_drvdata(dev);
 256         unsigned long flags;
 257
 258         spin_lock_irqsave(&fm->lock, flags);
 259         fm->inhibit_new_cards = 1;
 260         fm->remove_mask = 0xf;
 261         fm->insert_mask = 0;
 262         writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 263         spin_unlock_irqrestore(&fm->lock, flags);
 264         flush_workqueue(fm->wq);
 265
 266         tifm_7xx1_remove_media(&fm->media_remover);
 267
 268         pci_set_power_state(dev, PCI_D3hot);
 269         pci_disable_device(dev);
 270         pci_save_state(dev);
 271         return 0;
 272 }
 273
 274 static int tifm_7xx1_resume(struct pci_dev *dev)
 275 {
 276         struct tifm_adapter *fm = pci_get_drvdata(dev);
 277         unsigned long flags;
 278
 279         pci_restore_state(dev);
 280         pci_enable_device(dev);
 281         pci_set_power_state(dev, PCI_D0);
 282         pci_set_master(dev);
 283
 284         spin_lock_irqsave(&fm->lock, flags);
 285         fm->inhibit_new_cards = 0;
 286         writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
 287         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 288         writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
 289                 fm->addr + FM_SET_INTERRUPT_ENABLE);
 290         fm->insert_mask = 0xf;
 291         spin_unlock_irqrestore(&fm->lock, flags);
 292         return 0;
 293 }
 294
 295 static int tifm_7xx1_probe(struct pci_dev *dev,
 296                         const struct pci_device_id *dev_id)
 297 {
 298         struct tifm_adapter *fm;
 299         int pci_dev_busy = 0;
 300         int rc;
 301
 302         rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
 303         if (rc)
 304                 return rc;
 305
 306         rc = pci_enable_device(dev);
 307         if (rc)
 308                 return rc;
 309
 310         pci_set_master(dev);
 311
 312         rc = pci_request_regions(dev, DRIVER_NAME);
 313         if (rc) {
 314                 pci_dev_busy = 1;
 315                 goto err_out;
 316         }
 317
 318         pci_intx(dev, 1);
 319
 320         fm = tifm_alloc_adapter();
 321         if (!fm) {
 322                 rc = -ENOMEM;
 323                 goto err_out_int;
 324         }
 325
 326         fm->dev = &dev->dev;
 327         fm->max_sockets = (dev->device == 0x803B) ? 2 : 4;
 328         fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets,
 329                                 GFP_KERNEL);
 330         if (!fm->sockets)
 331                 goto err_out_free;
 332
 333         INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media);
 334         INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media);
 335         fm->eject = tifm_7xx1_eject;
 336         pci_set_drvdata(dev, fm);
 337
 338         fm->addr = ioremap(pci_resource_start(dev, 0),
 339                                 pci_resource_len(dev, 0));
 340         if (!fm->addr)
 341                 goto err_out_free;
 342
 343         rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
 344         if (rc)
 345                 goto err_out_unmap;
 346
 347         rc = tifm_add_adapter(fm);
 348         if (rc)
 349                 goto err_out_irq;
 350
 351         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 352         writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
 353                 fm->addr + FM_SET_INTERRUPT_ENABLE);
 354
 355         fm->insert_mask = 0xf;
 356
 357         return 0;
 358
 359 err_out_irq:
 360         free_irq(dev->irq, fm);
 361 err_out_unmap:
 362         iounmap(fm->addr);
 363 err_out_free:
 364         pci_set_drvdata(dev, NULL);
 365         tifm_free_adapter(fm);
 366 err_out_int:
 367         pci_intx(dev, 0);
 368         pci_release_regions(dev);
 369 err_out:
 370         if (!pci_dev_busy)
 371                 pci_disable_device(dev);
 372         return rc;
 373 }
 374
 375 static void tifm_7xx1_remove(struct pci_dev *dev)
 376 {
 377         struct tifm_adapter *fm = pci_get_drvdata(dev);
 378         unsigned long flags;
 379
 380         spin_lock_irqsave(&fm->lock, flags);
 381         fm->inhibit_new_cards = 1;
 382         fm->remove_mask = 0xf;
 383         fm->insert_mask = 0;
 384         writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 385         spin_unlock_irqrestore(&fm->lock, flags);
 386
 387         flush_workqueue(fm->wq);
 388
 389         tifm_7xx1_remove_media(&fm->media_remover);
 390
 391         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 392         free_irq(dev->irq, fm);
 393
 394         tifm_remove_adapter(fm);
 395
 396         pci_set_drvdata(dev, NULL);
 397
 398         iounmap(fm->addr);
 399         pci_intx(dev, 0);
 400         pci_release_regions(dev);
 401
 402         pci_disable_device(dev);
 403         tifm_free_adapter(fm);
 404 }
 405
 406 static struct pci_device_id tifm_7xx1_pci_tbl [] = {
 407         { PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 408           0 }, /* xx21 - the one I have */
 409         { PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 410           0 }, /* xx12 - should be also supported */
 411         { }
 412 };
 413
 414 static struct pci_driver tifm_7xx1_driver = {
 415         .name = DRIVER_NAME,
 416         .id_table = tifm_7xx1_pci_tbl,
 417         .probe = tifm_7xx1_probe,
 418         .remove = tifm_7xx1_remove,
 419         .suspend = tifm_7xx1_suspend,
 420         .resume = tifm_7xx1_resume,
 421 };
 422
 423 static int __init tifm_7xx1_init(void)
 424 {
 425         return pci_register_driver(&tifm_7xx1_driver);
 426 }
 427
 428 static void __exit tifm_7xx1_exit(void)
 429 {
 430         pci_unregister_driver(&tifm_7xx1_driver);
 431 }
 432
 433 MODULE_AUTHOR("Alex Dubov");
 434 MODULE_DESCRIPTION("TI FlashMedia host driver");
 435 MODULE_LICENSE("GPL");
 436 MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
 437 MODULE_VERSION(DRIVER_VERSION);
 438
 439 module_init(tifm_7xx1_init);
 440 module_exit(tifm_7xx1_exit);