1/*====================================================================== 2 3 A driver for PCMCIA parallel port adapters 4 5 (specifically, for the Quatech SPP-100 EPP card: other cards will 6 probably require driver tweaks) 7 8 parport_cs.c 1.24 2001/10/13 14:04:05 9 10 The contents of this file are subject to the Mozilla Public 11 License Version 1.1 (the "License"); you may not use this file 12 except in compliance with the License. You may obtain a copy of 13 the License at http://www.mozilla.org/MPL/ 14 15 Software distributed under the License is distributed on an "AS 16 IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or 17 implied. See the License for the specific language governing 18 rights and limitations under the License. 19 20 The initial developer of the original code is David A. Hinds 21 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds 22 are Copyright (C) 1999 David A. Hinds. All Rights Reserved. 23 24 Alternatively, the contents of this file may be used under the 25 terms of the GNU General Public License version 2 (the "GPL"), in 26 which case the provisions of the GPL are applicable instead of the 27 above. If you wish to allow the use of your version of this file 28 only under the terms of the GPL and not to allow others to use 29 your version of this file under the MPL, indicate your decision 30 by deleting the provisions above and replace them with the notice 31 and other provisions required by the GPL. If you do not delete 32 the provisions above, a recipient may use your version of this 33 file under either the MPL or the GPL. 34 35======================================================================*/ 36 37 38#include <linux/kernel.h> 39#include <linux/version.h> 40#include <linux/module.h> 41#include <linux/init.h> 42#include <linux/sched.h> 43#include <linux/ptrace.h> 44#include <linux/slab.h> 45#include <linux/string.h> 46#include <linux/timer.h> 47#include <linux/ioport.h> 48 49#include <linux/parport.h> 50#include <linux/parport_pc.h> 51 52#include <pcmcia/version.h> 53#include <pcmcia/cs_types.h> 54#include <pcmcia/cs.h> 55#include <pcmcia/cistpl.h> 56#include <pcmcia/ds.h> 57#include <pcmcia/cisreg.h> 58#include <pcmcia/ciscode.h> 59 60/*====================================================================*/ 61 62/* Module parameters */ 63 64MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); 65MODULE_DESCRIPTION("PCMCIA parallel port card driver"); 66MODULE_LICENSE("Dual MPL/GPL"); 67 68#define INT_MODULE_PARM(n, v) static int n = v; MODULE_PARM(n, "i") 69 70/* Bit map of interrupts to choose from */ 71INT_MODULE_PARM(irq_mask, 0xdeb8); 72static int irq_list[4] = { -1 }; 73MODULE_PARM(irq_list, "1-4i"); 74 75INT_MODULE_PARM(epp_mode, 1); 76 77#ifdef PCMCIA_DEBUG 78INT_MODULE_PARM(pc_debug, PCMCIA_DEBUG); 79#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args) 80static char *version = 81"parport_cs.c 1.24 2001/10/13 14:04:05 (David Hinds)"; 82#else 83#define DEBUG(n, args...) 84#endif 85 86/*====================================================================*/ 87 88#define FORCE_EPP_MODE 0x08 89 90typedef struct parport_info_t { 91 dev_link_t link; 92 int ndev; 93 dev_node_t node; 94 struct parport *port; 95} parport_info_t; 96 97static dev_link_t *parport_attach(void); 98static void parport_detach(dev_link_t *); 99static void parport_config(dev_link_t *link); 100static void parport_cs_release(u_long arg); 101static int parport_event(event_t event, int priority, 102 event_callback_args_t *args); 103 104static dev_info_t dev_info = "parport_cs"; 105static dev_link_t *dev_list = NULL; 106 107/*====================================================================*/ 108 109static void cs_error(client_handle_t handle, int func, int ret) 110{ 111 error_info_t err = { func, ret }; 112 CardServices(ReportError, handle, &err); 113} 114 115/*====================================================================== 116 117 parport_attach() creates an "instance" of the driver, allocating 118 local data structures for one device. The device is registered 119 with Card Services. 120 121======================================================================*/ 122 123static dev_link_t *parport_attach(void) 124{ 125 parport_info_t *info; 126 dev_link_t *link; 127 client_reg_t client_reg; 128 int i, ret; 129 130 DEBUG(0, "parport_attach()\n"); 131 132 /* Create new parport device */ 133 info = kmalloc(sizeof(*info), GFP_KERNEL); 134 if (!info) return NULL; 135 memset(info, 0, sizeof(*info)); 136 link = &info->link; link->priv = info; 137 138 link->release.function = &parport_cs_release; 139 link->release.data = (u_long)link; 140 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; 141 link->io.Attributes2 = IO_DATA_PATH_WIDTH_8; 142 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; 143 link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID; 144 if (irq_list[0] == -1) 145 link->irq.IRQInfo2 = irq_mask; 146 else 147 for (i = 0; i < 4; i++) 148 link->irq.IRQInfo2 |= 1 << irq_list[i]; 149 link->conf.Attributes = CONF_ENABLE_IRQ; 150 link->conf.Vcc = 50; 151 link->conf.IntType = INT_MEMORY_AND_IO; 152 153 /* Register with Card Services */ 154 link->next = dev_list; 155 dev_list = link; 156 client_reg.dev_info = &dev_info; 157 client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE; 158 client_reg.EventMask = 159 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL | 160 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET | 161 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME; 162 client_reg.event_handler = &parport_event; 163 client_reg.Version = 0x0210; 164 client_reg.event_callback_args.client_data = link; 165 ret = CardServices(RegisterClient, &link->handle, &client_reg); 166 if (ret != CS_SUCCESS) { 167 cs_error(link->handle, RegisterClient, ret); 168 parport_detach(link); 169 return NULL; 170 } 171 172 return link; 173} /* parport_attach */ 174 175/*====================================================================== 176 177 This deletes a driver "instance". The device is de-registered 178 with Card Services. If it has been released, all local data 179 structures are freed. Otherwise, the structures will be freed 180 when the device is released. 181 182======================================================================*/ 183 184static void parport_detach(dev_link_t *link) 185{ 186 dev_link_t **linkp; 187 int ret; 188 189 DEBUG(0, "parport_detach(0x%p)\n", link); 190 191 /* Locate device structure */ 192 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next) 193 if (*linkp == link) break; 194 if (*linkp == NULL) 195 return; 196 197 del_timer(&link->release); 198 if (link->state & DEV_CONFIG) 199 parport_cs_release((u_long)link); 200 201 if (link->handle) { 202 ret = CardServices(DeregisterClient, link->handle); 203 if (ret != CS_SUCCESS) 204 cs_error(link->handle, DeregisterClient, ret); 205 } 206 207 /* Unlink, free device structure */ 208 *linkp = link->next; 209 kfree(link->priv); 210 211} /* parport_detach */ 212 213/*====================================================================== 214 215 parport_config() is scheduled to run after a CARD_INSERTION event 216 is received, to configure the PCMCIA socket, and to make the 217 parport device available to the system. 218 219======================================================================*/ 220 221#define CS_CHECK(fn, args...) \ 222while ((last_ret=CardServices(last_fn=(fn), args))!=0) goto cs_failed 223 224#define CFG_CHECK(fn, args...) \ 225if (CardServices(fn, args) != 0) goto next_entry 226 227static struct { u_int flag; char *name; } mode[] = { 228 { PARPORT_MODE_TRISTATE, "PS2" }, 229 { PARPORT_MODE_EPP, "EPP" }, 230 { PARPORT_MODE_ECP, "ECP" }, 231}; 232 233void parport_config(dev_link_t *link) 234{ 235 client_handle_t handle = link->handle; 236 parport_info_t *info = link->priv; 237 tuple_t tuple; 238 u_short buf[128]; 239 cisparse_t parse; 240 config_info_t conf; 241 cistpl_cftable_entry_t *cfg = &parse.cftable_entry; 242 cistpl_cftable_entry_t dflt = { 0 }; 243 struct parport *p; 244 int i, last_ret, last_fn; 245 246 DEBUG(0, "parport_config(0x%p)\n", link); 247 248 tuple.TupleData = (cisdata_t *)buf; 249 tuple.TupleOffset = 0; tuple.TupleDataMax = 255; 250 tuple.Attributes = 0; 251 tuple.DesiredTuple = CISTPL_CONFIG; 252 CS_CHECK(GetFirstTuple, handle, &tuple); 253 CS_CHECK(GetTupleData, handle, &tuple); 254 CS_CHECK(ParseTuple, handle, &tuple, &parse); 255 link->conf.ConfigBase = parse.config.base; 256 link->conf.Present = parse.config.rmask[0]; 257 258 /* Configure card */ 259 link->state |= DEV_CONFIG; 260 261 /* Not sure if this is right... look up the current Vcc */ 262 CS_CHECK(GetConfigurationInfo, handle, &conf); 263 264 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; 265 tuple.Attributes = 0; 266 CS_CHECK(GetFirstTuple, handle, &tuple); 267 while (1) { 268 CFG_CHECK(GetTupleData, handle, &tuple); 269 CFG_CHECK(ParseTuple, handle, &tuple, &parse); 270 271 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) { 272 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io; 273 link->conf.ConfigIndex = cfg->index; 274 if (epp_mode) 275 link->conf.ConfigIndex |= FORCE_EPP_MODE; 276 link->io.BasePort1 = io->win[0].base; 277 link->io.NumPorts1 = io->win[0].len; 278 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK; 279 if (io->nwin == 2) { 280 link->io.BasePort2 = io->win[1].base; 281 link->io.NumPorts2 = io->win[1].len; 282 } 283 CFG_CHECK(RequestIO, link->handle, &link->io); 284 /* If we've got this far, we're done */ 285 break; 286 } 287 288 next_entry: 289 if (cfg->flags & CISTPL_CFTABLE_DEFAULT) dflt = *cfg; 290 CS_CHECK(GetNextTuple, handle, &tuple); 291 } 292 293 CS_CHECK(RequestIRQ, handle, &link->irq); 294 CS_CHECK(RequestConfiguration, handle, &link->conf); 295 296 p = parport_pc_probe_port(link->io.BasePort1, link->io.BasePort2, 297 link->irq.AssignedIRQ, PARPORT_DMA_NONE, 298 NULL); 299 if (p == NULL) { 300 printk(KERN_NOTICE "parport_cs: parport_pc_probe_port() at " 301 "0x%3x, irq %u failed\n", link->io.BasePort1, 302 link->irq.AssignedIRQ); 303 goto failed; 304 } 305 306 p->modes |= PARPORT_MODE_PCSPP; 307 if (epp_mode) 308 p->modes |= PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP; 309 info->ndev = 1; 310 info->node.major = LP_MAJOR; 311 info->node.minor = p->number; 312 info->port = p; 313 strcpy(info->node.dev_name, p->name); 314 link->dev = &info->node; 315 printk(KERN_INFO "%s: PC-style PCMCIA at %#x", p->name, 316 link->io.BasePort1); 317 if (link->io.NumPorts2) 318 printk(" & %#x", link->io.BasePort2); 319 printk(", irq %u [SPP", link->irq.AssignedIRQ); 320 for (i = 0; i < 5; i++) 321 if (p->modes & mode[i].flag) printk(",%s", mode[i].name); 322 printk("]\n"); 323 324 link->state &= ~DEV_CONFIG_PENDING; 325 return; 326 327cs_failed: 328 cs_error(link->handle, last_fn, last_ret); 329failed: 330 parport_cs_release((u_long)link); 331 332} /* parport_config */ 333 334/*====================================================================== 335 336 After a card is removed, parport_cs_release() will unregister the 337 device, and release the PCMCIA configuration. If the device is 338 still open, this will be postponed until it is closed. 339 340======================================================================*/ 341 342void parport_cs_release(u_long arg) 343{ 344 dev_link_t *link = (dev_link_t *)arg; 345 parport_info_t *info = link->priv; 346 347 DEBUG(0, "parport_release(0x%p)\n", link); 348 349 if (info->ndev) { 350 struct parport *p = info->port; 351 parport_proc_unregister(p); 352 kfree(p->private_data); 353 parport_unregister_port(p); 354 } 355 info->ndev = 0; 356 link->dev = NULL; 357 358 CardServices(ReleaseConfiguration, link->handle); 359 CardServices(ReleaseIO, link->handle, &link->io); 360 CardServices(ReleaseIRQ, link->handle, &link->irq); 361 362 link->state &= ~DEV_CONFIG; 363 364} /* parport_cs_release */ 365 366/*====================================================================== 367 368 The card status event handler. Mostly, this schedules other 369 stuff to run after an event is received. 370 371======================================================================*/ 372 373int parport_event(event_t event, int priority, 374 event_callback_args_t *args) 375{ 376 dev_link_t *link = args->client_data; 377 378 DEBUG(1, "parport_event(0x%06x)\n", event); 379 380 switch (event) { 381 case CS_EVENT_CARD_REMOVAL: 382 link->state &= ~DEV_PRESENT; 383 if (link->state & DEV_CONFIG) 384 mod_timer(&link->release, jiffies + HZ/20); 385 break; 386 case CS_EVENT_CARD_INSERTION: 387 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; 388 parport_config(link); 389 break; 390 case CS_EVENT_PM_SUSPEND: 391 link->state |= DEV_SUSPEND; 392 /* Fall through... */ 393 case CS_EVENT_RESET_PHYSICAL: 394 if (link->state & DEV_CONFIG) 395 CardServices(ReleaseConfiguration, link->handle); 396 break; 397 case CS_EVENT_PM_RESUME: 398 link->state &= ~DEV_SUSPEND; 399 /* Fall through... */ 400 case CS_EVENT_CARD_RESET: 401 if (DEV_OK(link)) 402 CardServices(RequestConfiguration, link->handle, &link->conf); 403 break; 404 } 405 return 0; 406} /* parport_event */ 407 408/*====================================================================*/ 409 410static int __init init_parport_cs(void) 411{ 412 servinfo_t serv; 413 DEBUG(0, "%s\n", version); 414 CardServices(GetCardServicesInfo, &serv); 415 if (serv.Revision != CS_RELEASE_CODE) { 416 printk(KERN_NOTICE "parport_cs: Card Services release " 417 "does not match!\n"); 418 return -1; 419 } 420 421 register_pccard_driver(&dev_info, &parport_attach, &parport_detach); 422 return 0; 423} 424 425static void __exit exit_parport_cs(void) 426{ 427 DEBUG(0, "parport_cs: unloading\n"); 428 unregister_pccard_driver(&dev_info); 429 while (dev_list != NULL) 430 parport_detach(dev_list); 431} 432 433module_init(init_parport_cs); 434module_exit(exit_parport_cs); 435