David Brownell | c6de2b6 | 2005-05-26 05:55:55 -0700 | [diff] [blame^] | 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); |