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 "0.7"
  17
  18 static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
  19 {
  20         unsigned long flags;
  21
  22         spin_lock_irqsave(&fm->lock, flags);
  23         if (!fm->inhibit_new_cards) {
  24                 fm->remove_mask |= 1 << sock->socket_id;
  25                 queue_work(fm->wq, &fm->media_remover);
  26         }
  27         spin_unlock_irqrestore(&fm->lock, flags);
  28 }
  29
  30 static void tifm_7xx1_remove_media(struct work_struct *work)
  31 {
  32         struct tifm_adapter *fm =
  33                 container_of(work, struct tifm_adapter, media_remover);
  34         unsigned long flags;
  35         int cnt;
  36         struct tifm_dev *sock;
  37
  38         if (!class_device_get(&fm->cdev))
  39                 return;
  40         spin_lock_irqsave(&fm->lock, flags);
  41         for (cnt = 0; cnt < fm->max_sockets; cnt++) {
  42                 if (fm->sockets[cnt] && (fm->remove_mask & (1 << cnt))) {
  43                         printk(KERN_INFO DRIVER_NAME
  44                                ": demand removing card from socket %d\n", cnt);
  45                         sock = fm->sockets[cnt];
  46                         fm->sockets[cnt] = NULL;
  47                         fm->remove_mask &= ~(1 << cnt);
  48
  49                         writel(0x0e00, sock->addr + SOCK_CONTROL);
  50
  51                         writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
  52                                 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
  53                         writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
  54                                 fm->addr + FM_SET_INTERRUPT_ENABLE);
  55
  56                         spin_unlock_irqrestore(&fm->lock, flags);
  57                         device_unregister(&sock->dev);
  58                         spin_lock_irqsave(&fm->lock, flags);
  59                 }
  60         }
  61         spin_unlock_irqrestore(&fm->lock, flags);
  62         class_device_put(&fm->cdev);
  63 }
  64
  65 static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
  66 {
  67         struct tifm_adapter *fm = dev_id;
  68         struct tifm_dev *sock;
  69         unsigned int irq_status;
  70         unsigned int sock_irq_status, cnt;
  71
  72         spin_lock(&fm->lock);
  73         irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
  74         if (irq_status == 0 || irq_status == (~0)) {
  75                 spin_unlock(&fm->lock);
  76                 return IRQ_NONE;
  77         }
  78
  79         if (irq_status & TIFM_IRQ_ENABLE) {
  80                 writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
  81
  82                 for (cnt = 0; cnt <  fm->max_sockets; cnt++) {
  83                         sock = fm->sockets[cnt];
  84                         sock_irq_status = (irq_status >> cnt) &
  85                                         (TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK);
  86
  87                         if (sock) {
  88                                 if (sock_irq_status)
  89                                         sock->signal_irq(sock, sock_irq_status);
  90
  91                                 if (irq_status & (1 << cnt))
  92                                         fm->remove_mask |= 1 << cnt;
  93                         } else {
  94                                 if (irq_status & (1 << cnt))
  95                                         fm->insert_mask |= 1 << cnt;
  96                         }
  97                 }
  98         }
  99         writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
 100
 101         if (!fm->inhibit_new_cards) {
 102                 if (!fm->remove_mask && !fm->insert_mask) {
 103                         writel(TIFM_IRQ_ENABLE,
 104                                 fm->addr + FM_SET_INTERRUPT_ENABLE);
 105                 } else {
 106                         queue_work(fm->wq, &fm->media_remover);
 107                         queue_work(fm->wq, &fm->media_inserter);
 108                 }
 109         }
 110
 111         spin_unlock(&fm->lock);
 112         return IRQ_HANDLED;
 113 }
 114
 115 static tifm_media_id tifm_7xx1_toggle_sock_power(char __iomem *sock_addr, int is_x2)
 116 {
 117         unsigned int s_state;
 118         int cnt;
 119
 120         writel(0x0e00, sock_addr + SOCK_CONTROL);
 121
 122         for (cnt = 0; cnt < 100; cnt++) {
 123                 if (!(TIFM_SOCK_STATE_POWERED &
 124                                 readl(sock_addr + SOCK_PRESENT_STATE)))
 125                         break;
 126                 msleep(10);
 127         }
 128
 129         s_state = readl(sock_addr + SOCK_PRESENT_STATE);
 130         if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
 131                 return FM_NULL;
 132
 133         if (is_x2) {
 134                 writel((s_state & 7) | 0x0c00, sock_addr + SOCK_CONTROL);
 135         } else {
 136                 // SmartMedia cards need extra 40 msec
 137                 if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7) == 1)
 138                         msleep(40);
 139                 writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
 140                        sock_addr + SOCK_CONTROL);
 141                 msleep(10);
 142                 writel((s_state & 0x7) | 0x0c00 | TIFM_CTRL_LED,
 143                         sock_addr + SOCK_CONTROL);
 144         }
 145
 146         for (cnt = 0; cnt < 100; cnt++) {
 147                 if ((TIFM_SOCK_STATE_POWERED &
 148                                 readl(sock_addr + SOCK_PRESENT_STATE)))
 149                         break;
 150                 msleep(10);
 151         }
 152
 153         if (!is_x2)
 154                 writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
 155                        sock_addr + SOCK_CONTROL);
 156
 157         return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
 158 }
 159
 160 inline static char __iomem *
 161 tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
 162 {
 163         return base_addr + ((sock_num + 1) << 10);
 164 }
 165
 166 static void tifm_7xx1_insert_media(struct work_struct *work)
 167 {
 168         struct tifm_adapter *fm =
 169                 container_of(work, struct tifm_adapter, media_inserter);
 170         unsigned long flags;
 171         tifm_media_id media_id;
 172         char *card_name = "xx";
 173         int cnt, ok_to_register;
 174         unsigned int insert_mask;
 175         struct tifm_dev *new_sock = NULL;
 176
 177         if (!class_device_get(&fm->cdev))
 178                 return;
 179         spin_lock_irqsave(&fm->lock, flags);
 180         insert_mask = fm->insert_mask;
 181         fm->insert_mask = 0;
 182         if (fm->inhibit_new_cards) {
 183                 spin_unlock_irqrestore(&fm->lock, flags);
 184                 class_device_put(&fm->cdev);
 185                 return;
 186         }
 187         spin_unlock_irqrestore(&fm->lock, flags);
 188
 189         for (cnt = 0; cnt < fm->max_sockets; cnt++) {
 190                 if (!(insert_mask & (1 << cnt)))
 191                         continue;
 192
 193                 media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt),
 194                                                        fm->max_sockets == 2);
 195                 if (media_id) {
 196                         ok_to_register = 0;
 197                         new_sock = tifm_alloc_device(fm);
 198                         if (new_sock) {
 199                                 new_sock->addr = tifm_7xx1_sock_addr(fm->addr,
 200                                                                         cnt);
 201                                 new_sock->media_id = media_id;
 202                                 new_sock->socket_id = cnt;
 203                                 switch (media_id) {
 204                                 case 1:
 205                                         card_name = "xd";
 206                                         break;
 207                                 case 2:
 208                                         card_name = "ms";
 209                                         break;
 210                                 case 3:
 211                                         card_name = "sd";
 212                                         break;
 213                                 default:
 214                                         break;
 215                                 }
 216                                 snprintf(new_sock->dev.bus_id, BUS_ID_SIZE,
 217                                         "tifm_%s%u:%u", card_name, fm->id, cnt);
 218                                 printk(KERN_INFO DRIVER_NAME
 219                                         ": %s card detected in socket %d\n",
 220                                         card_name, cnt);
 221                                 spin_lock_irqsave(&fm->lock, flags);
 222                                 if (!fm->sockets[cnt]) {
 223                                         fm->sockets[cnt] = new_sock;
 224                                         ok_to_register = 1;
 225                                 }
 226                                 spin_unlock_irqrestore(&fm->lock, flags);
 227                                 if (!ok_to_register ||
 228                                             device_register(&new_sock->dev)) {
 229                                         spin_lock_irqsave(&fm->lock, flags);
 230                                         fm->sockets[cnt] = NULL;
 231                                         spin_unlock_irqrestore(&fm->lock,
 232                                                                 flags);
 233                                         tifm_free_device(&new_sock->dev);
 234                                 }
 235                         }
 236                 }
 237                 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
 238                        fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 239                 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
 240                        fm->addr + FM_SET_INTERRUPT_ENABLE);
 241         }
 242
 243         writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
 244         class_device_put(&fm->cdev);
 245 }
 246
 247 static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
 248 {
 249         struct tifm_adapter *fm = pci_get_drvdata(dev);
 250         unsigned long flags;
 251
 252         spin_lock_irqsave(&fm->lock, flags);
 253         fm->inhibit_new_cards = 1;
 254         fm->remove_mask = 0xf;
 255         fm->insert_mask = 0;
 256         writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 257         spin_unlock_irqrestore(&fm->lock, flags);
 258         flush_workqueue(fm->wq);
 259
 260         tifm_7xx1_remove_media(&fm->media_remover);
 261
 262         pci_set_power_state(dev, PCI_D3hot);
 263         pci_disable_device(dev);
 264         pci_save_state(dev);
 265         return 0;
 266 }
 267
 268 static int tifm_7xx1_resume(struct pci_dev *dev)
 269 {
 270         struct tifm_adapter *fm = pci_get_drvdata(dev);
 271         unsigned long flags;
 272
 273         pci_restore_state(dev);
 274         pci_enable_device(dev);
 275         pci_set_power_state(dev, PCI_D0);
 276         pci_set_master(dev);
 277
 278         spin_lock_irqsave(&fm->lock, flags);
 279         fm->inhibit_new_cards = 0;
 280         writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
 281         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 282         writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
 283                 fm->addr + FM_SET_INTERRUPT_ENABLE);
 284         fm->insert_mask = 0xf;
 285         spin_unlock_irqrestore(&fm->lock, flags);
 286         return 0;
 287 }
 288
 289 static int tifm_7xx1_probe(struct pci_dev *dev,
 290                         const struct pci_device_id *dev_id)
 291 {
 292         struct tifm_adapter *fm;
 293         int pci_dev_busy = 0;
 294         int rc;
 295
 296         rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
 297         if (rc)
 298                 return rc;
 299
 300         rc = pci_enable_device(dev);
 301         if (rc)
 302                 return rc;
 303
 304         pci_set_master(dev);
 305
 306         rc = pci_request_regions(dev, DRIVER_NAME);
 307         if (rc) {
 308                 pci_dev_busy = 1;
 309                 goto err_out;
 310         }
 311
 312         pci_intx(dev, 1);
 313
 314         fm = tifm_alloc_adapter();
 315         if (!fm) {
 316                 rc = -ENOMEM;
 317                 goto err_out_int;
 318         }
 319
 320         fm->dev = &dev->dev;
 321         fm->max_sockets = (dev->device == 0x803B) ? 2 : 4;
 322         fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets,
 323                                 GFP_KERNEL);
 324         if (!fm->sockets)
 325                 goto err_out_free;
 326
 327         INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media);
 328         INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media);
 329         fm->eject = tifm_7xx1_eject;
 330         pci_set_drvdata(dev, fm);
 331
 332         fm->addr = ioremap(pci_resource_start(dev, 0),
 333                                 pci_resource_len(dev, 0));
 334         if (!fm->addr)
 335                 goto err_out_free;
 336
 337         rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
 338         if (rc)
 339                 goto err_out_unmap;
 340
 341         rc = tifm_add_adapter(fm);
 342         if (rc)
 343                 goto err_out_irq;
 344
 345         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 346         writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
 347                 fm->addr + FM_SET_INTERRUPT_ENABLE);
 348
 349         fm->insert_mask = 0xf;
 350
 351         return 0;
 352
 353 err_out_irq:
 354         free_irq(dev->irq, fm);
 355 err_out_unmap:
 356         iounmap(fm->addr);
 357 err_out_free:
 358         pci_set_drvdata(dev, NULL);
 359         tifm_free_adapter(fm);
 360 err_out_int:
 361         pci_intx(dev, 0);
 362         pci_release_regions(dev);
 363 err_out:
 364         if (!pci_dev_busy)
 365                 pci_disable_device(dev);
 366         return rc;
 367 }
 368
 369 static void tifm_7xx1_remove(struct pci_dev *dev)
 370 {
 371         struct tifm_adapter *fm = pci_get_drvdata(dev);
 372         unsigned long flags;
 373
 374         spin_lock_irqsave(&fm->lock, flags);
 375         fm->inhibit_new_cards = 1;
 376         fm->remove_mask = 0xf;
 377         fm->insert_mask = 0;
 378         writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 379         spin_unlock_irqrestore(&fm->lock, flags);
 380
 381         flush_workqueue(fm->wq);
 382
 383         tifm_7xx1_remove_media(&fm->media_remover);
 384
 385         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 386         free_irq(dev->irq, fm);
 387
 388         tifm_remove_adapter(fm);
 389
 390         pci_set_drvdata(dev, NULL);
 391
 392         iounmap(fm->addr);
 393         pci_intx(dev, 0);
 394         pci_release_regions(dev);
 395
 396         pci_disable_device(dev);
 397         tifm_free_adapter(fm);
 398 }
 399
 400 static struct pci_device_id tifm_7xx1_pci_tbl [] = {
 401         { PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 402           0 }, /* xx21 - the one I have */
 403         { PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 404           0 }, /* xx12 - should be also supported */
 405         { }
 406 };
 407
 408 static struct pci_driver tifm_7xx1_driver = {
 409         .name = DRIVER_NAME,
 410         .id_table = tifm_7xx1_pci_tbl,
 411         .probe = tifm_7xx1_probe,
 412         .remove = tifm_7xx1_remove,
 413         .suspend = tifm_7xx1_suspend,
 414         .resume = tifm_7xx1_resume,
 415 };
 416
 417 static int __init tifm_7xx1_init(void)
 418 {
 419         return pci_register_driver(&tifm_7xx1_driver);
 420 }
 421
 422 static void __exit tifm_7xx1_exit(void)
 423 {
 424         pci_unregister_driver(&tifm_7xx1_driver);
 425 }
 426
 427 MODULE_AUTHOR("Alex Dubov");
 428 MODULE_DESCRIPTION("TI FlashMedia host driver");
 429 MODULE_LICENSE("GPL");
 430 MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
 431 MODULE_VERSION(DRIVER_VERSION);
 432
 433 module_init(tifm_7xx1_init);
 434 module_exit(tifm_7xx1_exit);