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 #include <linux/platform_device.h>
  23
  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(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 typedef struct local_info_t {
  70         dev_link_t              link;
  71         dev_node_t              node;
  72 } local_info_t;
  73
  74 static void sl811_cs_release(dev_link_t * link);
  75
  76 /*====================================================================*/
  77
  78 static void release_platform_dev(struct device * dev)
  79 {
  80         DBG(0, "sl811_cs platform_dev release\n");
  81         dev->parent = NULL;
  82 }
  83
  84 static struct sl811_platform_data platform_data = {
  85         .potpg          = 100,
  86         .power          = 50,           /* == 100mA */
  87         // .reset       = ... FIXME:  invoke CF reset on the card
  88 };
  89
  90 static struct resource resources[] = {
  91         [0] = {
  92                 .flags  = IORESOURCE_IRQ,
  93         },
  94         [1] = {
  95                 // .name   = "address",
  96                 .flags  = IORESOURCE_IO,
  97         },
  98         [2] = {
  99                 // .name   = "data",
 100                 .flags  = IORESOURCE_IO,
 101         },
 102 };
 103
 104 extern struct platform_driver sl811h_driver;
 105
 106 static struct platform_device platform_dev = {
 107         .id                     = -1,
 108         .dev = {
 109                 .platform_data = &platform_data,
 110                 .release       = release_platform_dev,
 111         },
 112         .resource               = resources,
 113         .num_resources          = ARRAY_SIZE(resources),
 114 };
 115
 116 static int sl811_hc_init(struct device *parent, ioaddr_t base_addr, int irq)
 117 {
 118         if (platform_dev.dev.parent)
 119                 return -EBUSY;
 120         platform_dev.dev.parent = parent;
 121
 122         /* finish seting up the platform device */
 123         resources[0].start = irq;
 124
 125         resources[1].start = base_addr;
 126         resources[1].end = base_addr;
 127
 128         resources[2].start = base_addr + 1;
 129         resources[2].end   = base_addr + 1;
 130
 131         /* The driver core will probe for us.  We know sl811-hcd has been
 132          * initialized already because of the link order dependency created
 133          * by referencing "sl811h_driver".
 134          */
 135         platform_dev.name = sl811h_driver.driver.name;
 136         return platform_device_register(&platform_dev);
 137 }
 138
 139 /*====================================================================*/
 140
 141 static void sl811_cs_detach(struct pcmcia_device *p_dev)
 142 {
 143         dev_link_t *link = dev_to_instance(p_dev);
 144
 145         DBG(0, "sl811_cs_detach(0x%p)\n", link);
 146
 147         link->state &= ~DEV_PRESENT;
 148         if (link->state & DEV_CONFIG)
 149                 sl811_cs_release(link);
 150
 151         /* This points to the parent local_info_t struct */
 152         kfree(link->priv);
 153 }
 154
 155 static void sl811_cs_release(dev_link_t * link)
 156 {
 157
 158         DBG(0, "sl811_cs_release(0x%p)\n", link);
 159
 160         /* Unlink the device chain */
 161         link->dev = NULL;
 162
 163         platform_device_unregister(&platform_dev);
 164         pcmcia_release_configuration(link->handle);
 165         if (link->io.NumPorts1)
 166                 pcmcia_release_io(link->handle, &link->io);
 167         if (link->irq.AssignedIRQ)
 168                 pcmcia_release_irq(link->handle, &link->irq);
 169         link->state &= ~DEV_CONFIG;
 170 }
 171
 172 static void sl811_cs_config(dev_link_t *link)
 173 {
 174         client_handle_t         handle = link->handle;
 175         struct device           *parent = &handle_to_dev(handle);
 176         local_info_t            *dev = link->priv;
 177         tuple_t                 tuple;
 178         cisparse_t              parse;
 179         int                     last_fn, last_ret;
 180         u_char                  buf[64];
 181         config_info_t           conf;
 182         cistpl_cftable_entry_t  dflt = { 0 };
 183
 184         DBG(0, "sl811_cs_config(0x%p)\n", link);
 185
 186         tuple.DesiredTuple = CISTPL_CONFIG;
 187         tuple.Attributes = 0;
 188         tuple.TupleData = buf;
 189         tuple.TupleDataMax = sizeof(buf);
 190         tuple.TupleOffset = 0;
 191         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 192         CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
 193         CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, &parse));
 194         link->conf.ConfigBase = parse.config.base;
 195         link->conf.Present = parse.config.rmask[0];
 196
 197         /* Configure card */
 198         link->state |= DEV_CONFIG;
 199
 200         /* Look up the current Vcc */
 201         CS_CHECK(GetConfigurationInfo,
 202                         pcmcia_get_configuration_info(handle, &conf));
 203         link->conf.Vcc = conf.Vcc;
 204
 205         tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
 206         CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
 207         while (1) {
 208                 cistpl_cftable_entry_t  *cfg = &(parse.cftable_entry);
 209
 210                 if (pcmcia_get_tuple_data(handle, &tuple) != 0
 211                                 || pcmcia_parse_tuple(handle, &tuple, &parse)
 212                                                 != 0)
 213                         goto next_entry;
 214
 215                 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) {
 216                         dflt = *cfg;
 217                 }
 218
 219                 if (cfg->index == 0)
 220                         goto next_entry;
 221
 222                 link->conf.ConfigIndex = cfg->index;
 223
 224                 /* Use power settings for Vcc and Vpp if present */
 225                 /*  Note that the CIS values need to be rescaled */
 226                 if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
 227                         if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000
 228                                         != conf.Vcc)
 229                                 goto next_entry;
 230                 } else if (dflt.vcc.present & (1<<CISTPL_POWER_VNOM)) {
 231                         if (dflt.vcc.param[CISTPL_POWER_VNOM]/10000
 232                                         != conf.Vcc)
 233                                 goto next_entry;
 234                 }
 235
 236                 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
 237                         link->conf.Vpp1 = link->conf.Vpp2 =
 238                                 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
 239                 else if (dflt.vpp1.present & (1<<CISTPL_POWER_VNOM))
 240                         link->conf.Vpp1 = link->conf.Vpp2 =
 241                                 dflt.vpp1.param[CISTPL_POWER_VNOM]/10000;
 242
 243                 /* we need an interrupt */
 244                 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
 245                         link->conf.Attributes |= CONF_ENABLE_IRQ;
 246
 247                 /* IO window settings */
 248                 link->io.NumPorts1 = link->io.NumPorts2 = 0;
 249                 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
 250                         cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
 251
 252                         link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
 253                         link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
 254                         link->io.BasePort1 = io->win[0].base;
 255                         link->io.NumPorts1 = io->win[0].len;
 256
 257                         if (pcmcia_request_io(link->handle, &link->io) != 0)
 258                                 goto next_entry;
 259                 }
 260                 break;
 261
 262 next_entry:
 263                 if (link->io.NumPorts1)
 264                         pcmcia_release_io(link->handle, &link->io);
 265                 last_ret = pcmcia_get_next_tuple(handle, &tuple);
 266         }
 267
 268         /* require an IRQ and two registers */
 269         if (!link->io.NumPorts1 || link->io.NumPorts1 < 2)
 270                 goto cs_failed;
 271         if (link->conf.Attributes & CONF_ENABLE_IRQ)
 272                 CS_CHECK(RequestIRQ,
 273                         pcmcia_request_irq(link->handle, &link->irq));
 274         else
 275                 goto cs_failed;
 276
 277         CS_CHECK(RequestConfiguration,
 278                 pcmcia_request_configuration(link->handle, &link->conf));
 279
 280         sprintf(dev->node.dev_name, driver_name);
 281         dev->node.major = dev->node.minor = 0;
 282         link->dev = &dev->node;
 283
 284         printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
 285                dev->node.dev_name, link->conf.ConfigIndex,
 286                link->conf.Vcc/10, link->conf.Vcc%10);
 287         if (link->conf.Vpp1)
 288                 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
 289         printk(", irq %d", link->irq.AssignedIRQ);
 290         printk(", io 0x%04x-0x%04x", link->io.BasePort1,
 291                link->io.BasePort1+link->io.NumPorts1-1);
 292         printk("\n");
 293
 294         link->state &= ~DEV_CONFIG_PENDING;
 295
 296         if (sl811_hc_init(parent, link->io.BasePort1, link->irq.AssignedIRQ)
 297                         < 0) {
 298 cs_failed:
 299                 printk("sl811_cs_config failed\n");
 300                 cs_error(link->handle, last_fn, last_ret);
 301                 sl811_cs_release(link);
 302                 link->state &= ~DEV_CONFIG_PENDING;
 303         }
 304 }
 305
 306 static int sl811_suspend(struct pcmcia_device *dev)
 307 {
 308         dev_link_t *link = dev_to_instance(dev);
 309
 310         link->state |= DEV_SUSPEND;
 311         if (link->state & DEV_CONFIG)
 312                 pcmcia_release_configuration(link->handle);
 313
 314         return 0;
 315 }
 316
 317 static int sl811_resume(struct pcmcia_device *dev)
 318 {
 319         dev_link_t *link = dev_to_instance(dev);
 320
 321         link->state &= ~DEV_SUSPEND;
 322         if (link->state & DEV_CONFIG)
 323                 pcmcia_request_configuration(link->handle, &link->conf);
 324
 325         return 0;
 326 }
 327
 328 static int sl811_cs_attach(struct pcmcia_device *p_dev)
 329 {
 330         local_info_t *local;
 331         dev_link_t *link;
 332
 333         local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
 334         if (!local)
 335                 return -ENOMEM;
 336         memset(local, 0, sizeof(local_info_t));
 337         link = &local->link;
 338         link->priv = local;
 339
 340         /* Initialize */
 341         link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
 342         link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID;
 343         link->irq.Handler = NULL;
 344
 345         link->conf.Attributes = 0;
 346         link->conf.Vcc = 33;
 347         link->conf.IntType = INT_MEMORY_AND_IO;
 348
 349         link->handle = p_dev;
 350         p_dev->instance = link;
 351
 352         link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
 353         sl811_cs_config(link);
 354
 355         return 0;
 356 }
 357
 358 static struct pcmcia_device_id sl811_ids[] = {
 359         PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
 360         PCMCIA_DEVICE_NULL,
 361 };
 362 MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
 363
 364 static struct pcmcia_driver sl811_cs_driver = {
 365         .owner          = THIS_MODULE,
 366         .drv            = {
 367                 .name   = (char *)driver_name,
 368         },
 369         .probe          = sl811_cs_attach,
 370         .remove         = sl811_cs_detach,
 371         .id_table       = sl811_ids,
 372         .suspend        = sl811_suspend,
 373         .resume         = sl811_resume,
 374 };
 375
 376 /*====================================================================*/
 377
 378 static int __init init_sl811_cs(void)
 379 {
 380         return pcmcia_register_driver(&sl811_cs_driver);
 381 }
 382 module_init(init_sl811_cs);
 383
 384 static void __exit exit_sl811_cs(void)
 385 {
 386         pcmcia_unregister_driver(&sl811_cs_driver);
 387 }
 388 module_exit(exit_sl811_cs);