drivers/usb/host/sl811_cs.c

   1 /*
   2  * PCMCIA driver for SL811HS (as found in REX-CFU1U)
   3  * Filename: sl811_cs.c
   4  * Author:   Yukio Yamamoto
   5  *
   6  *  Port to sl811-hcd and 2.6.x by
   7  *    Botond Botyanszki <boti@rocketmail.com>
   8  *    Simon Pickering
   9  *
  10  *  Last update: 2005-05-12
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/init.h>
  16 #include <linux/sched.h>
  17 #include <linux/ptrace.h>
  18 #include <linux/slab.h>
  19 #include <linux/string.h>
  20 #include <linux/timer.h>
  21 #include <linux/ioport.h>
  22
  23 #include <pcmcia/version.h>
  24 #include <pcmcia/cs_types.h>
  25 #include <pcmcia/cs.h>
  26 #include <pcmcia/cistpl.h>
  27 #include <pcmcia/cisreg.h>
  28 #include <pcmcia/ds.h>
  29
  30 #include <linux/usb_sl811.h>
  31
  32 MODULE_AUTHOR("Botond Botyanszki");
  33 MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
  34 MODULE_LICENSE("GPL");
  35
  36
  37 /*====================================================================*/
  38 /* MACROS                                                             */
  39 /*====================================================================*/
  40
  41 #if defined(DEBUG) || defined(CONFIG_USB_DEBUG) || defined(PCMCIA_DEBUG)
  42
  43 static int pc_debug = 0;
  44 module_param(pc_debug, int, 0644);
  45
  46 #define DBG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG "sl811_cs: " args)
  47
  48 #else
  49 #define DBG(n, args...) do{}while(0)
  50 #endif  /* no debugging */
  51
  52 #define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
  53
  54 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
  55
  56 #define CS_CHECK(fn, ret) \
  57         do { \
  58                 last_fn = (fn); \
  59                 if ((last_ret = (ret)) != 0) \
  60                         goto cs_failed; \
  61         } while (0)
  62
  63 /*====================================================================*/
  64 /* VARIABLES                                                          */
  65 /*====================================================================*/
  66
  67 static const char driver_name[DEV_NAME_LEN]  = "sl811_cs";
  68
  69 static dev_link_t *dev_list = NULL;
  70
  71 static int irq_list[4] = { -1 };
  72 static int irq_list_count;
  73
  74 module_param_array(irq_list, int, &irq_list_count, 0444);
  75
  76 INT_MODULE_PARM(irq_mask, 0xdeb8);
  77
  78 typedef struct local_info_t {
  79         dev_link_t              link;
  80         dev_node_t              node;
  81 } local_info_t;
  82
  83 /*====================================================================*/
  84
  85 static void release_platform_dev(struct device * dev)
  86 {
  87         DBG(0, "sl811_cs platform_dev release\n");
  88         dev->parent = NULL;
  89 }
  90
  91 static struct sl811_platform_data platform_data = {
  92         .potpg          = 100,
  93         .power          = 50,           /* == 100mA */
  94         // .reset       = ... FIXME:  invoke CF reset on the card
  95 };
  96
  97 static struct resource resources[] = {
  98         [0] = {
  99                 .flags  = IORESOURCE_IRQ,
 100         },
 101         [1] = {
 102                 // .name   = "address",
 103                 .flags  = IORESOURCE_IO,
 104         },
 105         [2] = {
 106                 // .name   = "data",
 107                 .flags  = IORESOURCE_IO,
 108         },
 109 };
 110
 111 extern struct device_driver sl811h_driver;
 112
 113 static struct platform_device platform_dev = {
 114         .id                     = -1,
 115         .dev = {
 116                 .platform_data = &platform_data,
 117                 .release       = release_platform_dev,
 118         },
 119         .resource               = resources,
 120         .num_resources          = ARRAY_SIZE(resources),
 121 };
 122
 123 static int sl811_hc_init(struct device *parent, ioaddr_t base_addr, int irq)
 124 {
 125         if (platform_dev.dev.parent)
 126                 return -EBUSY;
 127         platform_dev.dev.parent = parent;
 128
 129         /* finish seting up the platform device */
 130         resources[0].start = irq;
 131
 132         resources[1].start = base_addr;
 133         resources[1].end = base_addr;
 134
 135         resources[2].start = base_addr + 1;
 136         resources[2].end   = base_addr + 1;
 137
 138         /* The driver core will probe for us.  We know sl811-hcd has been
 139          * initialized already because of the link order dependency.
 140          */
 141         platform_dev.name = sl811h_driver.name;
 142         return platform_device_register(&platform_dev);
 143 }
 144
 145 /*====================================================================*/
 146
 147 static void sl811_cs_detach(dev_link_t *link)
 148 {
 149         dev_link_t **linkp;
 150
 151         DBG(0, "sl811_cs_detach(0x%p)\n", link);
 152
 153         /* Locate device structure */
 154         for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) {
 155                 if (*linkp == link)
 156                         break;
 157         }
 158         if (*linkp == NULL)
 159                 return;
 160
 161         /* Break the link with Card Services */
 162         if (link->handle)
 163                 pcmcia_deregister_client(link->handle);
 164
 165         /* Unlink device structure, and free it */
 166         *linkp = link->next;
 167         /* This points to the parent local_info_t struct */
 168         kfree(link->priv);
 169 }
 170
 171 static void sl811_cs_release(dev_link_t * link)
 172 {
 173
 174         DBG(0, "sl811_cs_release(0x%p)\n", link);
 175
 176         if (link->open) {
 177                 DBG(1, "sl811_cs: release postponed, '%s' still open\n",
 178                     link->dev->dev_name);
 179                 link->state |= DEV_STALE_CONFIG;
 180                 return;
 181         }
 182
 183         /* Unlink the device chain */
 184         link->dev = NULL;
 185
 186         platform_device_unregister(&platform_dev);
 187         pcmcia_release_configuration(link->handle);
 188         if (link->io.NumPorts1)
 189                 pcmcia_release_io(link->handle, &link->io);
 190         if (link->irq.AssignedIRQ)
 191                 pcmcia_release_irq(link->handle, &link->irq);
 192         link->state &= ~DEV_CONFIG;
 193
 194         if (link->state & DEV_STALE_LINK)
 195                 sl811_cs_detach(link);
 196 }
 197
 198 static void sl811_cs_config(dev_link_t *link)
 199 {
 200         client_handle_t         handle = link->handle;
 201         struct device           *parent = &handle_to_dev(handle);
 202         local_info_t            *dev = link->priv;
 203         tuple_t                 tuple;
 204         cisparse_t              parse;
 205         int                     last_fn, last_ret;
 206         u_char                  buf[64];
 207         config_info_t           conf;
 208         cistpl_cftable_entry_t  dflt = { 0 };
 209
 210         DBG(0, "sl811_cs_config(0x%p)\n", link);
 211
 212         tuple.DesiredTuple = CISTPL_CONFIG;
 213         tuple.Attributes = 0;
 214         tuple.TupleData = buf;
 215         tuple.TupleDataMax = sizeof(buf);
 216         tuple.TupleOffset = 0;
 217         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 218         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 219         CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
 220         link->conf.ConfigBase = parse.config.base;
 221         link->conf.Present = parse.config.rmask[0];
 222
 223         /* Configure card */
 224         link->state |= DEV_CONFIG;
 225
 226         /* Look up the current Vcc */
 227         CS_CHECK(GetConfigurationInfo,
 228                         pcmcia_get_configuration_info(handle, &conf));
 229         link->conf.Vcc = conf.Vcc;
 230
 231         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 232         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 233         while (1) {
 234                 cistpl_cftable_entry_t  *cfg = &(parse.cftable_entry);
 235
 236                 if (pcmcia_get_tuple_data(handle, &tuple) != 0
 237                                 || pcmcia_parse_tuple(handle, &tuple, &parse)
 238                                                 != 0)
 239                         goto next_entry;
 240
 241                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) {
 242                         dflt = *cfg;
 243                 }
 244
 245                 if (cfg->index == 0)
 246                         goto next_entry;
 247
 248                 link->conf.ConfigIndex = cfg->index;
 249
 250                 /* Use power settings for Vcc and Vpp if present */
 251                 /*  Note that the CIS values need to be rescaled */
 252                 if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
 253                         if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000
 254                                         != conf.Vcc)
 255                                 goto next_entry;
 256                 } else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) {
 257                         if (dflt.vcc.param[CISTPL_POWER_VNOM]/10000
 258                                         != conf.Vcc)
 259                                 goto next_entry;
 260                 }
 261
 262                 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 263                         link->conf.Vpp1 = link->conf.Vpp2 =
 264                                 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 265                 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
 266                         link->conf.Vpp1 = link->conf.Vpp2 =
 267                                 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
 268
 269                 /* we need an interrupt */
 270                 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
 271                         link->conf.Attributes |= CONF_ENABLE_IRQ;
 272
 273                 /* IO window settings */
 274                 link->io.NumPorts1 = link->io.NumPorts2 = 0;
 275                 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 276                         cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 277
 278                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 279                         link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 280                         link->io.BasePort1 = io->win[0].base;
 281                         link->io.NumPorts1 = io->win[0].len;
 282
 283                         if (pcmcia_request_io(link->handle, &link->io) != 0)
 284                                 goto next_entry;
 285                 }
 286                 break;
 287
 288 next_entry:
 289                 if (link->io.NumPorts1)
 290                         pcmcia_release_io(link->handle, &link->io);
 291                 last_ret = pcmcia_get_next_tuple(handle, &tuple);
 292         }
 293
 294         /* require an IRQ and two registers */
 295         if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
 296                 goto cs_failed;
 297         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 298                 CS_CHECK(RequestIRQ,
 299                         pcmcia_request_irq(link->handle, &link->irq));
 300         else
 301                 goto cs_failed;
 302
 303         CS_CHECK(RequestConfiguration,
 304                 pcmcia_request_configuration(link->handle, &link->conf));
 305
 306         sprintf(dev->node.dev_name, driver_name);
 307         dev->node.major = dev->node.minor = 0;
 308         link->dev = &dev->node;
 309
 310         printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
 311                dev->node.dev_name, link->conf.ConfigIndex,
 312                link->conf.Vcc/10, link->conf.Vcc%10);
 313         if (link->conf.Vpp1)
 314                 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
 315         printk(", irq %d", link->irq.AssignedIRQ);
 316         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 317                link->io.BasePort1+link->io.NumPorts1-1);
 318         printk("\n");
 319
 320         link->state &= ~DEV_CONFIG_PENDING;
 321
 322         if (sl811_hc_init(parent, link->io.BasePort1, link->irq.AssignedIRQ)
 323                         < 0) {
 324 cs_failed:
 325                 printk("sl811_cs_config failed\n");
 326                 cs_error(link->handle, last_fn, last_ret);
 327                 sl811_cs_release(link);
 328                 link->state &= ~DEV_CONFIG_PENDING;
 329         }
 330 }
 331
 332 static int
 333 sl811_cs_event(event_t event, int priority, event_callback_args_t *args)
 334 {
 335         dev_link_t *link = args->client_data;
 336
 337         DBG(1, "sl811_cs_event(0x%06x)\n", event);
 338
 339         switch (event) {
 340         case CS_EVENT_CARD_REMOVAL:
 341                 link->state &= ~DEV_PRESENT;
 342                 if (link->state & DEV_CONFIG)
 343                         sl811_cs_release(link);
 344                 break;
 345
 346         case CS_EVENT_CARD_INSERTION:
 347                 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 348                 sl811_cs_config(link);
 349                 break;
 350
 351         case CS_EVENT_PM_SUSPEND:
 352                 link->state |= DEV_SUSPEND;
 353                 /* Fall through... */
 354         case CS_EVENT_RESET_PHYSICAL:
 355                 if (link->state & DEV_CONFIG)
 356                         pcmcia_release_configuration(link->handle);
 357                 break;
 358
 359         case CS_EVENT_PM_RESUME:
 360                 link->state &= ~DEV_SUSPEND;
 361                 /* Fall through... */
 362         case CS_EVENT_CARD_RESET:
 363                 if (link->state & DEV_CONFIG)
 364                         pcmcia_request_configuration(link->handle, &link->conf);
 365                 DBG(0, "reset sl811-hcd here?\n");
 366                 break;
 367         }
 368         return 0;
 369 }
 370
 371 static dev_link_t *sl811_cs_attach(void)
 372 {
 373         local_info_t *local;
 374         dev_link_t *link;
 375         client_reg_t client_reg;
 376         int ret, i;
 377
 378         local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
 379         if (!local)
 380                 return NULL;
 381         memset(local, 0, sizeof(local_info_t));
 382         link = &local->link;
 383         link->priv = local;
 384
 385         /* Initialize */
 386         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 387         link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
 388         if (irq_list[0] == -1)
 389                 link->irq.IRQInfo2 = irq_mask;
 390         else
 391                 for (i = 0; i < irq_list_count; i++)
 392                         link->irq.IRQInfo2 |= 1 << irq_list[i];
 393         link->irq.Handler = NULL;
 394
 395         link->conf.Attributes = 0;
 396         link->conf.Vcc = 33;
 397         link->conf.IntType = INT_MEMORY_AND_IO;
 398
 399         /* Register with Card Services */
 400         link->next = dev_list;
 401         dev_list = link;
 402         client_reg.dev_info = (dev_info_t *) &driver_name;
 403         client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
 404         client_reg.EventMask =
 405                 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
 406                 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
 407                 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
 408         client_reg.event_handler = &sl811_cs_event;
 409         client_reg.Version = 0x0210;
 410         client_reg.event_callback_args.client_data = link;
 411         ret = pcmcia_register_client(&link->handle, &client_reg);
 412         if (ret != CS_SUCCESS) {
 413                 cs_error(link->handle, RegisterClient, ret);
 414                 sl811_cs_detach(link);
 415                 return NULL;
 416         }
 417
 418         return link;
 419 }
 420
 421 static struct pcmcia_driver sl811_cs_driver = {
 422         .owner          = THIS_MODULE,
 423         .drv            = {
 424                 .name   = (char *)driver_name,
 425         },
 426         .attach         = sl811_cs_attach,
 427         .detach         = sl811_cs_detach,
 428 };
 429
 430 /*====================================================================*/
 431
 432 static int __init init_sl811_cs(void)
 433 {
 434         return pcmcia_register_driver(&sl811_cs_driver);
 435 }
 436 module_init(init_sl811_cs);
 437
 438 static void __exit exit_sl811_cs(void)
 439 {
 440         pcmcia_unregister_driver(&sl811_cs_driver);
 441 }
 442 module_exit(exit_sl811_cs);