Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: avm_cs.c,v 1.4.6.3 2001/09/23 22:24:33 kai Exp $ |
| 2 | * |
| 3 | * A PCMCIA client driver for AVM B1/M1/M2 |
| 4 | * |
| 5 | * Copyright 1999 by Carsten Paeth <calle@calle.de> |
| 6 | * |
| 7 | * This software may be used and distributed according to the terms |
| 8 | * of the GNU General Public License, incorporated herein by reference. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/sched.h> |
| 16 | #include <linux/ptrace.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/string.h> |
| 19 | #include <linux/tty.h> |
| 20 | #include <linux/serial.h> |
| 21 | #include <linux/major.h> |
| 22 | #include <asm/io.h> |
| 23 | #include <asm/system.h> |
| 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <pcmcia/cs_types.h> |
| 26 | #include <pcmcia/cs.h> |
| 27 | #include <pcmcia/cistpl.h> |
| 28 | #include <pcmcia/ciscode.h> |
| 29 | #include <pcmcia/ds.h> |
| 30 | #include <pcmcia/cisreg.h> |
| 31 | |
| 32 | #include <linux/skbuff.h> |
| 33 | #include <linux/capi.h> |
| 34 | #include <linux/b1lli.h> |
| 35 | #include <linux/b1pcmcia.h> |
| 36 | |
| 37 | /*====================================================================*/ |
| 38 | |
| 39 | MODULE_DESCRIPTION("CAPI4Linux: PCMCIA client driver for AVM B1/M1/M2"); |
| 40 | MODULE_AUTHOR("Carsten Paeth"); |
| 41 | MODULE_LICENSE("GPL"); |
| 42 | |
| 43 | /*====================================================================*/ |
| 44 | |
| 45 | /* |
| 46 | The event() function is this driver's Card Services event handler. |
| 47 | It will be called by Card Services when an appropriate card status |
| 48 | event is received. The config() and release() entry points are |
| 49 | used to configure or release a socket, in response to card insertion |
| 50 | and ejection events. They are invoked from the skeleton event |
| 51 | handler. |
| 52 | */ |
| 53 | |
| 54 | static void avmcs_config(dev_link_t *link); |
| 55 | static void avmcs_release(dev_link_t *link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
| 57 | /* |
| 58 | The attach() and detach() entry points are used to create and destroy |
| 59 | "instances" of the driver, where each instance represents everything |
| 60 | needed to manage one actual PCMCIA card. |
| 61 | */ |
| 62 | |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 63 | static void avmcs_detach(struct pcmcia_device *p_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
| 65 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | A linked list of "instances" of the skeleton device. Each actual |
| 67 | PCMCIA card corresponds to one device instance, and is described |
| 68 | by one dev_link_t structure (defined in ds.h). |
| 69 | |
| 70 | You may not want to use a linked list for this -- for example, the |
| 71 | memory card driver uses an array of dev_link_t pointers, where minor |
| 72 | device numbers are used to derive the corresponding array index. |
| 73 | */ |
| 74 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | A driver needs to provide a dev_node_t structure for each device |
| 77 | on a card. In some cases, there is only one device per card (for |
| 78 | example, ethernet cards, modems). In other cases, there may be |
| 79 | many actual or logical devices (SCSI adapters, memory cards with |
| 80 | multiple partitions). The dev_node_t structures need to be kept |
| 81 | in a linked list starting at the 'dev' field of a dev_link_t |
| 82 | structure. We allocate them in the card's private data structure, |
| 83 | because they generally can't be allocated dynamically. |
| 84 | */ |
| 85 | |
| 86 | typedef struct local_info_t { |
| 87 | dev_node_t node; |
| 88 | } local_info_t; |
| 89 | |
| 90 | /*====================================================================== |
| 91 | |
| 92 | avmcs_attach() creates an "instance" of the driver, allocating |
| 93 | local data structures for one device. The device is registered |
| 94 | with Card Services. |
| 95 | |
| 96 | The dev_link structure is initialized, but we don't actually |
| 97 | configure the card at this point -- we wait until we receive a |
| 98 | card insertion event. |
| 99 | |
| 100 | ======================================================================*/ |
| 101 | |
Dominik Brodowski | f8cfa61 | 2005-11-14 21:25:51 +0100 | [diff] [blame] | 102 | static int avmcs_attach(struct pcmcia_device *p_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | dev_link_t *link; |
| 105 | local_info_t *local; |
Dominik Brodowski | f8cfa61 | 2005-11-14 21:25:51 +0100 | [diff] [blame] | 106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | /* Initialize the dev_link_t structure */ |
| 108 | link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL); |
| 109 | if (!link) |
| 110 | goto err; |
| 111 | memset(link, 0, sizeof(struct dev_link_t)); |
| 112 | |
| 113 | /* The io structure describes IO port mapping */ |
| 114 | link->io.NumPorts1 = 16; |
| 115 | link->io.Attributes1 = IO_DATA_PATH_WIDTH_8; |
| 116 | link->io.NumPorts2 = 0; |
| 117 | |
| 118 | /* Interrupt setup */ |
| 119 | link->irq.Attributes = IRQ_TYPE_EXCLUSIVE; |
| 120 | link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED; |
| 121 | |
| 122 | link->irq.IRQInfo1 = IRQ_LEVEL_ID; |
| 123 | |
| 124 | /* General socket configuration */ |
| 125 | link->conf.Attributes = CONF_ENABLE_IRQ; |
| 126 | link->conf.Vcc = 50; |
| 127 | link->conf.IntType = INT_MEMORY_AND_IO; |
| 128 | link->conf.ConfigIndex = 1; |
| 129 | link->conf.Present = PRESENT_OPTION; |
| 130 | |
| 131 | /* Allocate space for private device-specific data */ |
| 132 | local = kmalloc(sizeof(local_info_t), GFP_KERNEL); |
| 133 | if (!local) |
| 134 | goto err_kfree; |
| 135 | memset(local, 0, sizeof(local_info_t)); |
| 136 | link->priv = local; |
Dominik Brodowski | f8cfa61 | 2005-11-14 21:25:51 +0100 | [diff] [blame] | 137 | |
| 138 | link->handle = p_dev; |
| 139 | p_dev->instance = link; |
| 140 | |
| 141 | link->state |= DEV_PRESENT | DEV_CONFIG_PENDING; |
| 142 | avmcs_config(link); |
| 143 | |
| 144 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | err_kfree: |
| 147 | kfree(link); |
| 148 | err: |
Dominik Brodowski | f8cfa61 | 2005-11-14 21:25:51 +0100 | [diff] [blame] | 149 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | } /* avmcs_attach */ |
| 151 | |
| 152 | /*====================================================================== |
| 153 | |
| 154 | This deletes a driver "instance". The device is de-registered |
| 155 | with Card Services. If it has been released, all local data |
| 156 | structures are freed. Otherwise, the structures will be freed |
| 157 | when the device is released. |
| 158 | |
| 159 | ======================================================================*/ |
| 160 | |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 161 | static void avmcs_detach(struct pcmcia_device *p_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 163 | dev_link_t *link = dev_to_instance(p_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 165 | if (link->state & DEV_CONFIG) |
| 166 | avmcs_release(link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
Jesper Juhl | 3c7208f | 2005-11-07 01:01:29 -0800 | [diff] [blame] | 168 | kfree(link->priv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | kfree(link); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | } /* avmcs_detach */ |
| 171 | |
| 172 | /*====================================================================== |
| 173 | |
| 174 | avmcs_config() is scheduled to run after a CARD_INSERTION event |
| 175 | is received, to configure the PCMCIA socket, and to make the |
| 176 | ethernet device available to the system. |
| 177 | |
| 178 | ======================================================================*/ |
| 179 | |
| 180 | static int get_tuple(client_handle_t handle, tuple_t *tuple, |
| 181 | cisparse_t *parse) |
| 182 | { |
| 183 | int i = pcmcia_get_tuple_data(handle, tuple); |
| 184 | if (i != CS_SUCCESS) return i; |
| 185 | return pcmcia_parse_tuple(handle, tuple, parse); |
| 186 | } |
| 187 | |
| 188 | static int first_tuple(client_handle_t handle, tuple_t *tuple, |
| 189 | cisparse_t *parse) |
| 190 | { |
| 191 | int i = pcmcia_get_first_tuple(handle, tuple); |
| 192 | if (i != CS_SUCCESS) return i; |
| 193 | return get_tuple(handle, tuple, parse); |
| 194 | } |
| 195 | |
| 196 | static int next_tuple(client_handle_t handle, tuple_t *tuple, |
| 197 | cisparse_t *parse) |
| 198 | { |
| 199 | int i = pcmcia_get_next_tuple(handle, tuple); |
| 200 | if (i != CS_SUCCESS) return i; |
| 201 | return get_tuple(handle, tuple, parse); |
| 202 | } |
| 203 | |
| 204 | static void avmcs_config(dev_link_t *link) |
| 205 | { |
| 206 | client_handle_t handle; |
| 207 | tuple_t tuple; |
| 208 | cisparse_t parse; |
| 209 | cistpl_cftable_entry_t *cf = &parse.cftable_entry; |
| 210 | local_info_t *dev; |
| 211 | int i; |
| 212 | u_char buf[64]; |
| 213 | char devname[128]; |
| 214 | int cardtype; |
| 215 | int (*addcard)(unsigned int port, unsigned irq); |
| 216 | |
| 217 | handle = link->handle; |
| 218 | dev = link->priv; |
| 219 | |
| 220 | /* |
| 221 | This reads the card's CONFIG tuple to find its configuration |
| 222 | registers. |
| 223 | */ |
| 224 | do { |
| 225 | tuple.DesiredTuple = CISTPL_CONFIG; |
| 226 | i = pcmcia_get_first_tuple(handle, &tuple); |
| 227 | if (i != CS_SUCCESS) break; |
| 228 | tuple.TupleData = buf; |
| 229 | tuple.TupleDataMax = 64; |
| 230 | tuple.TupleOffset = 0; |
| 231 | i = pcmcia_get_tuple_data(handle, &tuple); |
| 232 | if (i != CS_SUCCESS) break; |
| 233 | i = pcmcia_parse_tuple(handle, &tuple, &parse); |
| 234 | if (i != CS_SUCCESS) break; |
| 235 | link->conf.ConfigBase = parse.config.base; |
| 236 | } while (0); |
| 237 | if (i != CS_SUCCESS) { |
| 238 | cs_error(link->handle, ParseTuple, i); |
| 239 | link->state &= ~DEV_CONFIG_PENDING; |
| 240 | return; |
| 241 | } |
| 242 | |
| 243 | /* Configure card */ |
| 244 | link->state |= DEV_CONFIG; |
| 245 | |
| 246 | do { |
| 247 | |
| 248 | tuple.Attributes = 0; |
| 249 | tuple.TupleData = buf; |
| 250 | tuple.TupleDataMax = 254; |
| 251 | tuple.TupleOffset = 0; |
| 252 | tuple.DesiredTuple = CISTPL_VERS_1; |
| 253 | |
| 254 | devname[0] = 0; |
| 255 | if( !first_tuple(handle, &tuple, &parse) && parse.version_1.ns > 1 ) { |
| 256 | strlcpy(devname,parse.version_1.str + parse.version_1.ofs[1], |
| 257 | sizeof(devname)); |
| 258 | } |
| 259 | /* |
| 260 | * find IO port |
| 261 | */ |
| 262 | tuple.TupleData = (cisdata_t *)buf; |
| 263 | tuple.TupleOffset = 0; tuple.TupleDataMax = 255; |
| 264 | tuple.Attributes = 0; |
| 265 | tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY; |
| 266 | i = first_tuple(handle, &tuple, &parse); |
| 267 | while (i == CS_SUCCESS) { |
| 268 | if (cf->io.nwin > 0) { |
| 269 | link->conf.ConfigIndex = cf->index; |
| 270 | link->io.BasePort1 = cf->io.win[0].base; |
| 271 | link->io.NumPorts1 = cf->io.win[0].len; |
| 272 | link->io.NumPorts2 = 0; |
| 273 | printk(KERN_INFO "avm_cs: testing i/o %#x-%#x\n", |
| 274 | link->io.BasePort1, |
| 275 | link->io.BasePort1+link->io.NumPorts1-1); |
| 276 | i = pcmcia_request_io(link->handle, &link->io); |
| 277 | if (i == CS_SUCCESS) goto found_port; |
| 278 | } |
| 279 | i = next_tuple(handle, &tuple, &parse); |
| 280 | } |
| 281 | |
| 282 | found_port: |
| 283 | if (i != CS_SUCCESS) { |
| 284 | cs_error(link->handle, RequestIO, i); |
| 285 | break; |
| 286 | } |
| 287 | |
| 288 | /* |
| 289 | * allocate an interrupt line |
| 290 | */ |
| 291 | i = pcmcia_request_irq(link->handle, &link->irq); |
| 292 | if (i != CS_SUCCESS) { |
| 293 | cs_error(link->handle, RequestIRQ, i); |
| 294 | pcmcia_release_io(link->handle, &link->io); |
| 295 | break; |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * configure the PCMCIA socket |
| 300 | */ |
| 301 | i = pcmcia_request_configuration(link->handle, &link->conf); |
| 302 | if (i != CS_SUCCESS) { |
| 303 | cs_error(link->handle, RequestConfiguration, i); |
| 304 | pcmcia_release_io(link->handle, &link->io); |
| 305 | pcmcia_release_irq(link->handle, &link->irq); |
| 306 | break; |
| 307 | } |
| 308 | |
| 309 | } while (0); |
| 310 | |
| 311 | /* At this point, the dev_node_t structure(s) should be |
| 312 | initialized and arranged in a linked list at link->dev. */ |
| 313 | |
| 314 | if (devname[0]) { |
| 315 | char *s = strrchr(devname, ' '); |
| 316 | if (!s) |
| 317 | s = devname; |
| 318 | else s++; |
| 319 | strcpy(dev->node.dev_name, s); |
| 320 | if (strcmp("M1", s) == 0) { |
| 321 | cardtype = AVM_CARDTYPE_M1; |
| 322 | } else if (strcmp("M2", s) == 0) { |
| 323 | cardtype = AVM_CARDTYPE_M2; |
| 324 | } else { |
| 325 | cardtype = AVM_CARDTYPE_B1; |
| 326 | } |
| 327 | } else { |
| 328 | strcpy(dev->node.dev_name, "b1"); |
| 329 | cardtype = AVM_CARDTYPE_B1; |
| 330 | } |
| 331 | |
| 332 | dev->node.major = 64; |
| 333 | dev->node.minor = 0; |
| 334 | link->dev = &dev->node; |
| 335 | |
| 336 | link->state &= ~DEV_CONFIG_PENDING; |
| 337 | /* If any step failed, release any partially configured state */ |
| 338 | if (i != 0) { |
| 339 | avmcs_release(link); |
| 340 | return; |
| 341 | } |
| 342 | |
| 343 | |
| 344 | switch (cardtype) { |
| 345 | case AVM_CARDTYPE_M1: addcard = b1pcmcia_addcard_m1; break; |
| 346 | case AVM_CARDTYPE_M2: addcard = b1pcmcia_addcard_m2; break; |
| 347 | default: |
| 348 | case AVM_CARDTYPE_B1: addcard = b1pcmcia_addcard_b1; break; |
| 349 | } |
| 350 | if ((i = (*addcard)(link->io.BasePort1, link->irq.AssignedIRQ)) < 0) { |
| 351 | printk(KERN_ERR "avm_cs: failed to add AVM-%s-Controller at i/o %#x, irq %d\n", |
| 352 | dev->node.dev_name, link->io.BasePort1, link->irq.AssignedIRQ); |
| 353 | avmcs_release(link); |
| 354 | return; |
| 355 | } |
| 356 | dev->node.minor = i; |
| 357 | |
| 358 | } /* avmcs_config */ |
| 359 | |
| 360 | /*====================================================================== |
| 361 | |
| 362 | After a card is removed, avmcs_release() will unregister the net |
| 363 | device, and release the PCMCIA configuration. If the device is |
| 364 | still open, this will be postponed until it is closed. |
| 365 | |
| 366 | ======================================================================*/ |
| 367 | |
| 368 | static void avmcs_release(dev_link_t *link) |
| 369 | { |
| 370 | b1pcmcia_delcard(link->io.BasePort1, link->irq.AssignedIRQ); |
| 371 | |
| 372 | /* Unlink the device chain */ |
| 373 | link->dev = NULL; |
| 374 | |
| 375 | /* Don't bother checking to see if these succeed or not */ |
| 376 | pcmcia_release_configuration(link->handle); |
| 377 | pcmcia_release_io(link->handle, &link->io); |
| 378 | pcmcia_release_irq(link->handle, &link->irq); |
| 379 | link->state &= ~DEV_CONFIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | } /* avmcs_release */ |
| 381 | |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 382 | static int avmcs_suspend(struct pcmcia_device *dev) |
| 383 | { |
| 384 | dev_link_t *link = dev_to_instance(dev); |
| 385 | |
| 386 | link->state |= DEV_SUSPEND; |
| 387 | if (link->state & DEV_CONFIG) |
| 388 | pcmcia_release_configuration(link->handle); |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static int avmcs_resume(struct pcmcia_device *dev) |
| 394 | { |
| 395 | dev_link_t *link = dev_to_instance(dev); |
| 396 | |
| 397 | link->state &= ~DEV_SUSPEND; |
| 398 | if (link->state & DEV_CONFIG) |
| 399 | pcmcia_request_configuration(link->handle, &link->conf); |
| 400 | |
| 401 | return 0; |
| 402 | } |
| 403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | /*====================================================================== |
| 405 | |
| 406 | The card status event handler. Mostly, this schedules other |
| 407 | stuff to run after an event is received. A CARD_REMOVAL event |
| 408 | also sets some flags to discourage the net drivers from trying |
| 409 | to talk to the card any more. |
| 410 | |
| 411 | When a CARD_REMOVAL event is received, we immediately set a flag |
| 412 | to block future accesses to this device. All the functions that |
| 413 | actually access the device should check this flag to make sure |
| 414 | the card is still present. |
| 415 | |
| 416 | ======================================================================*/ |
| 417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
Dominik Brodowski | a13bcf0 | 2005-06-27 16:28:35 -0700 | [diff] [blame] | 419 | static struct pcmcia_device_id avmcs_ids[] = { |
| 420 | PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN-Controller B1", 0x95d42008, 0x845dc335), |
| 421 | PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M1", 0x95d42008, 0x81e10430), |
| 422 | PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M2", 0x95d42008, 0x18e8558a), |
| 423 | PCMCIA_DEVICE_NULL |
| 424 | }; |
| 425 | MODULE_DEVICE_TABLE(pcmcia, avmcs_ids); |
| 426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | static struct pcmcia_driver avmcs_driver = { |
| 428 | .owner = THIS_MODULE, |
| 429 | .drv = { |
| 430 | .name = "avm_cs", |
| 431 | }, |
Dominik Brodowski | f8cfa61 | 2005-11-14 21:25:51 +0100 | [diff] [blame] | 432 | .probe = avmcs_attach, |
Dominik Brodowski | cc3b486 | 2005-11-14 21:23:14 +0100 | [diff] [blame] | 433 | .remove = avmcs_detach, |
Dominik Brodowski | a13bcf0 | 2005-06-27 16:28:35 -0700 | [diff] [blame] | 434 | .id_table = avmcs_ids, |
Dominik Brodowski | 98e4c28 | 2005-11-14 21:21:18 +0100 | [diff] [blame] | 435 | .suspend= avmcs_suspend, |
| 436 | .resume = avmcs_resume, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | }; |
| 438 | |
| 439 | static int __init avmcs_init(void) |
| 440 | { |
| 441 | return pcmcia_register_driver(&avmcs_driver); |
| 442 | } |
| 443 | |
| 444 | static void __exit avmcs_exit(void) |
| 445 | { |
| 446 | pcmcia_unregister_driver(&avmcs_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | } |
| 448 | |
| 449 | module_init(avmcs_init); |
| 450 | module_exit(avmcs_exit); |