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] = NULL;
  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)
  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 __iomem *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 __iomem *
 167 tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
 168 {
 169         return base_addr + ((sock_num + 1) << 10);
 170 }
 171
 172 static void tifm_7xx1_insert_media(void *adapter)
 173 {
 174         struct tifm_adapter *fm = adapter;
 175         unsigned long flags;
 176         tifm_media_id media_id;
 177         char *card_name = "xx";
 178         int cnt, ok_to_register;
 179         unsigned int insert_mask;
 180         struct tifm_dev *new_sock = NULL;
 181
 182         if (!class_device_get(&fm->cdev))
 183                 return;
 184         spin_lock_irqsave(&fm->lock, flags);
 185         insert_mask = fm->insert_mask;
 186         fm->insert_mask = 0;
 187         if (fm->inhibit_new_cards) {
 188                 spin_unlock_irqrestore(&fm->lock, flags);
 189                 class_device_put(&fm->cdev);
 190                 return;
 191         }
 192         spin_unlock_irqrestore(&fm->lock, flags);
 193
 194         for (cnt = 0; cnt < fm->max_sockets; cnt++) {
 195                 if (!(insert_mask & (1 << cnt)))
 196                         continue;
 197
 198                 media_id = tifm_7xx1_toggle_sock_power(tifm_7xx1_sock_addr(fm->addr, cnt),
 199                                                        fm->max_sockets == 2);
 200                 if (media_id) {
 201                         ok_to_register = 0;
 202                         new_sock = tifm_alloc_device(fm, cnt);
 203                         if (new_sock) {
 204                                 new_sock->addr = tifm_7xx1_sock_addr(fm->addr,
 205                                                                         cnt);
 206                                 new_sock->media_id = media_id;
 207                                 switch (media_id) {
 208                                 case 1:
 209                                         card_name = "xd";
 210                                         break;
 211                                 case 2:
 212                                         card_name = "ms";
 213                                         break;
 214                                 case 3:
 215                                         card_name = "sd";
 216                                         break;
 217                                 default:
 218                                         break;
 219                                 }
 220                                 snprintf(new_sock->dev.bus_id, BUS_ID_SIZE,
 221                                         "tifm_%s%u:%u", card_name, fm->id, cnt);
 222                                 printk(KERN_INFO DRIVER_NAME
 223                                         ": %s card detected in socket %d\n",
 224                                         card_name, cnt);
 225                                 spin_lock_irqsave(&fm->lock, flags);
 226                                 if (!fm->sockets[cnt]) {
 227                                         fm->sockets[cnt] = new_sock;
 228                                         ok_to_register = 1;
 229                                 }
 230                                 spin_unlock_irqrestore(&fm->lock, flags);
 231                                 if (!ok_to_register ||
 232                                             device_register(&new_sock->dev)) {
 233                                         spin_lock_irqsave(&fm->lock, flags);
 234                                         fm->sockets[cnt] = NULL;
 235                                         spin_unlock_irqrestore(&fm->lock,
 236                                                                 flags);
 237                                         tifm_free_device(&new_sock->dev);
 238                                 }
 239                         }
 240                 }
 241                 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
 242                        fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 243                 writel((TIFM_IRQ_FIFOMASK | TIFM_IRQ_CARDMASK) << cnt,
 244                        fm->addr + FM_SET_INTERRUPT_ENABLE);
 245         }
 246
 247         writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
 248         class_device_put(&fm->cdev);
 249 }
 250
 251 static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
 252 {
 253         struct tifm_adapter *fm = pci_get_drvdata(dev);
 254         unsigned long flags;
 255
 256         spin_lock_irqsave(&fm->lock, flags);
 257         fm->inhibit_new_cards = 1;
 258         fm->remove_mask = 0xf;
 259         fm->insert_mask = 0;
 260         writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 261         spin_unlock_irqrestore(&fm->lock, flags);
 262         flush_workqueue(fm->wq);
 263
 264         tifm_7xx1_remove_media(fm);
 265
 266         pci_set_power_state(dev, PCI_D3hot);
 267         pci_disable_device(dev);
 268         pci_save_state(dev);
 269         return 0;
 270 }
 271
 272 static int tifm_7xx1_resume(struct pci_dev *dev)
 273 {
 274         struct tifm_adapter *fm = pci_get_drvdata(dev);
 275         unsigned long flags;
 276
 277         pci_restore_state(dev);
 278         pci_enable_device(dev);
 279         pci_set_power_state(dev, PCI_D0);
 280         pci_set_master(dev);
 281
 282         spin_lock_irqsave(&fm->lock, flags);
 283         fm->inhibit_new_cards = 0;
 284         writel(TIFM_IRQ_SETALL, fm->addr + FM_INTERRUPT_STATUS);
 285         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 286         writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
 287                 fm->addr + FM_SET_INTERRUPT_ENABLE);
 288         fm->insert_mask = 0xf;
 289         spin_unlock_irqrestore(&fm->lock, flags);
 290         return 0;
 291 }
 292
 293 static int tifm_7xx1_probe(struct pci_dev *dev,
 294                         const struct pci_device_id *dev_id)
 295 {
 296         struct tifm_adapter *fm;
 297         int pci_dev_busy = 0;
 298         int rc;
 299
 300         rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
 301         if (rc)
 302                 return rc;
 303
 304         rc = pci_enable_device(dev);
 305         if (rc)
 306                 return rc;
 307
 308         pci_set_master(dev);
 309
 310         rc = pci_request_regions(dev, DRIVER_NAME);
 311         if (rc) {
 312                 pci_dev_busy = 1;
 313                 goto err_out;
 314         }
 315
 316         pci_intx(dev, 1);
 317
 318         fm = tifm_alloc_adapter();
 319         if (!fm) {
 320                 rc = -ENOMEM;
 321                 goto err_out_int;
 322         }
 323
 324         fm->dev = &dev->dev;
 325         fm->max_sockets = (dev->device == 0x803B) ? 2 : 4;
 326         fm->sockets = kzalloc(sizeof(struct tifm_dev*) * fm->max_sockets,
 327                                 GFP_KERNEL);
 328         if (!fm->sockets)
 329                 goto err_out_free;
 330
 331         INIT_WORK(&fm->media_inserter, tifm_7xx1_insert_media, fm);
 332         INIT_WORK(&fm->media_remover, tifm_7xx1_remove_media, fm);
 333         fm->eject = tifm_7xx1_eject;
 334         pci_set_drvdata(dev, fm);
 335
 336         fm->addr = ioremap(pci_resource_start(dev, 0),
 337                                 pci_resource_len(dev, 0));
 338         if (!fm->addr)
 339                 goto err_out_free;
 340
 341         rc = request_irq(dev->irq, tifm_7xx1_isr, SA_SHIRQ, DRIVER_NAME, fm);
 342         if (rc)
 343                 goto err_out_unmap;
 344
 345         rc = tifm_add_adapter(fm);
 346         if (rc)
 347                 goto err_out_irq;
 348
 349         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 350         writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SETALLSOCK,
 351                 fm->addr + FM_SET_INTERRUPT_ENABLE);
 352
 353         fm->insert_mask = 0xf;
 354
 355         return 0;
 356
 357 err_out_irq:
 358         free_irq(dev->irq, fm);
 359 err_out_unmap:
 360         iounmap(fm->addr);
 361 err_out_free:
 362         pci_set_drvdata(dev, NULL);
 363         tifm_free_adapter(fm);
 364 err_out_int:
 365         pci_intx(dev, 0);
 366         pci_release_regions(dev);
 367 err_out:
 368         if (!pci_dev_busy)
 369                 pci_disable_device(dev);
 370         return rc;
 371 }
 372
 373 static void tifm_7xx1_remove(struct pci_dev *dev)
 374 {
 375         struct tifm_adapter *fm = pci_get_drvdata(dev);
 376         unsigned long flags;
 377
 378         spin_lock_irqsave(&fm->lock, flags);
 379         fm->inhibit_new_cards = 1;
 380         fm->remove_mask = 0xf;
 381         fm->insert_mask = 0;
 382         writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 383         spin_unlock_irqrestore(&fm->lock, flags);
 384
 385         flush_workqueue(fm->wq);
 386
 387         tifm_7xx1_remove_media(fm);
 388
 389         writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
 390         free_irq(dev->irq, fm);
 391
 392         tifm_remove_adapter(fm);
 393
 394         pci_set_drvdata(dev, NULL);
 395
 396         iounmap(fm->addr);
 397         pci_intx(dev, 0);
 398         pci_release_regions(dev);
 399
 400         pci_disable_device(dev);
 401         tifm_free_adapter(fm);
 402 }
 403
 404 static struct pci_device_id tifm_7xx1_pci_tbl [] = {
 405         { PCI_VENDOR_ID_TI, 0x8033, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 406           0 }, /* xx21 - the one I have */
 407         { PCI_VENDOR_ID_TI, 0x803B, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 408           0 }, /* xx12 - should be also supported */
 409         { }
 410 };
 411
 412 static struct pci_driver tifm_7xx1_driver = {
 413         .name = DRIVER_NAME,
 414         .id_table = tifm_7xx1_pci_tbl,
 415         .probe = tifm_7xx1_probe,
 416         .remove = tifm_7xx1_remove,
 417         .suspend = tifm_7xx1_suspend,
 418         .resume = tifm_7xx1_resume,
 419 };
 420
 421 static int __init tifm_7xx1_init(void)
 422 {
 423         return pci_register_driver(&tifm_7xx1_driver);
 424 }
 425
 426 static void __exit tifm_7xx1_exit(void)
 427 {
 428         pci_unregister_driver(&tifm_7xx1_driver);
 429 }
 430
 431 MODULE_AUTHOR("Alex Dubov");
 432 MODULE_DESCRIPTION("TI FlashMedia host driver");
 433 MODULE_LICENSE("GPL");
 434 MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
 435 MODULE_VERSION(DRIVER_VERSION);
 436
 437 module_init(tifm_7xx1_init);
 438 module_exit(tifm_7xx1_exit);