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(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);