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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/ide.c Version 7.00beta2 Mar 05 2003 | |
3 | * | |
4 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Mostly written by Mark Lord <mlord@pobox.com> | |
9 | * and Gadi Oxman <gadio@netvision.net.il> | |
10 | * and Andre Hedrick <andre@linux-ide.org> | |
11 | * | |
12 | * See linux/MAINTAINERS for address of current maintainer. | |
13 | * | |
14 | * This is the multiple IDE interface driver, as evolved from hd.c. | |
15 | * It supports up to MAX_HWIFS IDE interfaces, on one or more IRQs | |
16 | * (usually 14 & 15). | |
17 | * There can be up to two drives per interface, as per the ATA-2 spec. | |
18 | * | |
19 | * Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64 | |
20 | * Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64 | |
21 | * Tertiary: ide2, port 0x???; major=33; hde is minor=0; hdf is minor=64 | |
22 | * Quaternary: ide3, port 0x???; major=34; hdg is minor=0; hdh is minor=64 | |
23 | * ... | |
24 | * | |
25 | * From hd.c: | |
26 | * | | |
27 | * | It traverses the request-list, using interrupts to jump between functions. | |
28 | * | As nearly all functions can be called within interrupts, we may not sleep. | |
29 | * | Special care is recommended. Have Fun! | |
30 | * | | |
31 | * | modified by Drew Eckhardt to check nr of hd's from the CMOS. | |
32 | * | | |
33 | * | Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug | |
34 | * | in the early extended-partition checks and added DM partitions. | |
35 | * | | |
36 | * | Early work on error handling by Mika Liljeberg (liljeber@cs.Helsinki.FI). | |
37 | * | | |
38 | * | IRQ-unmask, drive-id, multiple-mode, support for ">16 heads", | |
39 | * | and general streamlining by Mark Lord (mlord@pobox.com). | |
40 | * | |
41 | * October, 1994 -- Complete line-by-line overhaul for linux 1.1.x, by: | |
42 | * | |
43 | * Mark Lord (mlord@pobox.com) (IDE Perf.Pkg) | |
44 | * Delman Lee (delman@ieee.org) ("Mr. atdisk2") | |
45 | * Scott Snyder (snyder@fnald0.fnal.gov) (ATAPI IDE cd-rom) | |
46 | * | |
47 | * This was a rewrite of just about everything from hd.c, though some original | |
48 | * code is still sprinkled about. Think of it as a major evolution, with | |
49 | * inspiration from lots of linux users, esp. hamish@zot.apana.org.au | |
50 | * | |
51 | * Version 1.0 ALPHA initial code, primary i/f working okay | |
52 | * Version 1.3 BETA dual i/f on shared irq tested & working! | |
53 | * Version 1.4 BETA added auto probing for irq(s) | |
54 | * Version 1.5 BETA added ALPHA (untested) support for IDE cd-roms, | |
55 | * ... | |
56 | * Version 5.50 allow values as small as 20 for idebus= | |
57 | * Version 5.51 force non io_32bit in drive_cmd_intr() | |
58 | * change delay_10ms() to delay_50ms() to fix problems | |
59 | * Version 5.52 fix incorrect invalidation of removable devices | |
60 | * add "hdx=slow" command line option | |
61 | * Version 5.60 start to modularize the driver; the disk and ATAPI | |
62 | * drivers can be compiled as loadable modules. | |
63 | * move IDE probe code to ide-probe.c | |
64 | * move IDE disk code to ide-disk.c | |
65 | * add support for generic IDE device subdrivers | |
66 | * add m68k code from Geert Uytterhoeven | |
67 | * probe all interfaces by default | |
68 | * add ioctl to (re)probe an interface | |
69 | * Version 6.00 use per device request queues | |
70 | * attempt to optimize shared hwgroup performance | |
71 | * add ioctl to manually adjust bandwidth algorithms | |
72 | * add kerneld support for the probe module | |
73 | * fix bug in ide_error() | |
74 | * fix bug in the first ide_get_lock() call for Atari | |
75 | * don't flush leftover data for ATAPI devices | |
76 | * Version 6.01 clear hwgroup->active while the hwgroup sleeps | |
77 | * support HDIO_GETGEO for floppies | |
78 | * Version 6.02 fix ide_ack_intr() call | |
79 | * check partition table on floppies | |
80 | * Version 6.03 handle bad status bit sequencing in ide_wait_stat() | |
81 | * Version 6.10 deleted old entries from this list of updates | |
82 | * replaced triton.c with ide-dma.c generic PCI DMA | |
83 | * added support for BIOS-enabled UltraDMA | |
84 | * rename all "promise" things to "pdc4030" | |
85 | * fix EZ-DRIVE handling on small disks | |
86 | * Version 6.11 fix probe error in ide_scan_devices() | |
87 | * fix ancient "jiffies" polling bugs | |
88 | * mask all hwgroup interrupts on each irq entry | |
89 | * Version 6.12 integrate ioctl and proc interfaces | |
90 | * fix parsing of "idex=" command line parameter | |
91 | * Version 6.13 add support for ide4/ide5 courtesy rjones@orchestream.com | |
92 | * Version 6.14 fixed IRQ sharing among PCI devices | |
93 | * Version 6.15 added SMP awareness to IDE drivers | |
94 | * Version 6.16 fixed various bugs; even more SMP friendly | |
95 | * Version 6.17 fix for newest EZ-Drive problem | |
96 | * Version 6.18 default unpartitioned-disk translation now "BIOS LBA" | |
97 | * Version 6.19 Re-design for a UNIFORM driver for all platforms, | |
98 | * model based on suggestions from Russell King and | |
99 | * Geert Uytterhoeven | |
100 | * Promise DC4030VL now supported. | |
101 | * add support for ide6/ide7 | |
102 | * delay_50ms() changed to ide_delay_50ms() and exported. | |
103 | * Version 6.20 Added/Fixed Generic ATA-66 support and hwif detection. | |
104 | * Added hdx=flash to allow for second flash disk | |
105 | * detection w/o the hang loop. | |
106 | * Added support for ide8/ide9 | |
107 | * Added idex=ata66 for the quirky chipsets that are | |
108 | * ATA-66 compliant, but have yet to determine a method | |
109 | * of verification of the 80c cable presence. | |
110 | * Specifically Promise's PDC20262 chipset. | |
111 | * Version 6.21 Fixing/Fixed SMP spinlock issue with insight from an old | |
112 | * hat that clarified original low level driver design. | |
113 | * Version 6.30 Added SMP support; fixed multmode issues. -ml | |
114 | * Version 6.31 Debug Share INTR's and request queue streaming | |
115 | * Native ATA-100 support | |
116 | * Prep for Cascades Project | |
117 | * Version 7.00alpha First named revision of ide rearrange | |
118 | * | |
119 | * Some additional driver compile-time options are in ./include/linux/ide.h | |
120 | * | |
121 | * To do, in likely order of completion: | |
122 | * - modify kernel to obtain BIOS geometry for drives on 2nd/3rd/4th i/f | |
123 | * | |
124 | */ | |
125 | ||
126 | #define REVISION "Revision: 7.00alpha2" | |
127 | #define VERSION "Id: ide.c 7.00a2 20020906" | |
128 | ||
129 | #undef REALLY_SLOW_IO /* most systems can safely undef this */ | |
130 | ||
131 | #define _IDE_C /* Tell ide.h it's really us */ | |
132 | ||
133 | #include <linux/config.h> | |
134 | #include <linux/module.h> | |
135 | #include <linux/types.h> | |
136 | #include <linux/string.h> | |
137 | #include <linux/kernel.h> | |
138 | #include <linux/timer.h> | |
139 | #include <linux/mm.h> | |
140 | #include <linux/interrupt.h> | |
141 | #include <linux/major.h> | |
142 | #include <linux/errno.h> | |
143 | #include <linux/genhd.h> | |
144 | #include <linux/blkpg.h> | |
145 | #include <linux/slab.h> | |
146 | #include <linux/init.h> | |
147 | #include <linux/pci.h> | |
148 | #include <linux/delay.h> | |
149 | #include <linux/ide.h> | |
150 | #include <linux/devfs_fs_kernel.h> | |
151 | #include <linux/completion.h> | |
152 | #include <linux/reboot.h> | |
153 | #include <linux/cdrom.h> | |
154 | #include <linux/seq_file.h> | |
155 | #include <linux/device.h> | |
156 | #include <linux/bitops.h> | |
157 | ||
158 | #include <asm/byteorder.h> | |
159 | #include <asm/irq.h> | |
160 | #include <asm/uaccess.h> | |
161 | #include <asm/io.h> | |
162 | ||
163 | ||
164 | /* default maximum number of failures */ | |
165 | #define IDE_DEFAULT_MAX_FAILURES 1 | |
166 | ||
167 | static const u8 ide_hwif_to_major[] = { IDE0_MAJOR, IDE1_MAJOR, | |
168 | IDE2_MAJOR, IDE3_MAJOR, | |
169 | IDE4_MAJOR, IDE5_MAJOR, | |
170 | IDE6_MAJOR, IDE7_MAJOR, | |
171 | IDE8_MAJOR, IDE9_MAJOR }; | |
172 | ||
173 | static int idebus_parameter; /* holds the "idebus=" parameter */ | |
174 | static int system_bus_speed; /* holds what we think is VESA/PCI bus speed */ | |
175 | static int initializing; /* set while initializing built-in drivers */ | |
176 | ||
177 | DECLARE_MUTEX(ide_cfg_sem); | |
178 | __cacheline_aligned_in_smp DEFINE_SPINLOCK(ide_lock); | |
179 | ||
180 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
181 | static int ide_scan_direction; /* THIS was formerly 2.2.x pci=reverse */ | |
182 | #endif | |
183 | ||
184 | #ifdef CONFIG_IDEDMA_AUTO | |
185 | int noautodma = 0; | |
186 | #else | |
187 | int noautodma = 1; | |
188 | #endif | |
189 | ||
190 | EXPORT_SYMBOL(noautodma); | |
191 | ||
192 | /* | |
193 | * This is declared extern in ide.h, for access by other IDE modules: | |
194 | */ | |
195 | ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ | |
196 | ||
197 | EXPORT_SYMBOL(ide_hwifs); | |
198 | ||
1da177e4 LT |
199 | /* |
200 | * Do not even *think* about calling this! | |
201 | */ | |
202 | static void init_hwif_data(ide_hwif_t *hwif, unsigned int index) | |
203 | { | |
204 | unsigned int unit; | |
205 | ||
206 | /* bulk initialize hwif & drive info with zeros */ | |
207 | memset(hwif, 0, sizeof(ide_hwif_t)); | |
208 | ||
209 | /* fill in any non-zero initial values */ | |
210 | hwif->index = index; | |
211 | hwif->major = ide_hwif_to_major[index]; | |
212 | ||
213 | hwif->name[0] = 'i'; | |
214 | hwif->name[1] = 'd'; | |
215 | hwif->name[2] = 'e'; | |
216 | hwif->name[3] = '0' + index; | |
217 | ||
218 | hwif->bus_state = BUSSTATE_ON; | |
219 | ||
220 | hwif->atapi_dma = 0; /* disable all atapi dma */ | |
221 | hwif->ultra_mask = 0x80; /* disable all ultra */ | |
222 | hwif->mwdma_mask = 0x80; /* disable all mwdma */ | |
223 | hwif->swdma_mask = 0x80; /* disable all swdma */ | |
224 | ||
225 | sema_init(&hwif->gendev_rel_sem, 0); | |
226 | ||
227 | default_hwif_iops(hwif); | |
228 | default_hwif_transport(hwif); | |
229 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
230 | ide_drive_t *drive = &hwif->drives[unit]; | |
231 | ||
232 | drive->media = ide_disk; | |
233 | drive->select.all = (unit<<4)|0xa0; | |
234 | drive->hwif = hwif; | |
235 | drive->ctl = 0x08; | |
236 | drive->ready_stat = READY_STAT; | |
237 | drive->bad_wstat = BAD_W_STAT; | |
238 | drive->special.b.recalibrate = 1; | |
239 | drive->special.b.set_geometry = 1; | |
240 | drive->name[0] = 'h'; | |
241 | drive->name[1] = 'd'; | |
242 | drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; | |
243 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; | |
244 | drive->using_dma = 0; | |
245 | drive->is_flash = 0; | |
246 | drive->vdma = 0; | |
247 | INIT_LIST_HEAD(&drive->list); | |
248 | sema_init(&drive->gendev_rel_sem, 0); | |
249 | } | |
250 | } | |
251 | ||
252 | static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) | |
253 | { | |
254 | hw_regs_t hw; | |
255 | ||
256 | memset(&hw, 0, sizeof(hw_regs_t)); | |
257 | ||
258 | ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); | |
259 | ||
260 | memcpy(&hwif->hw, &hw, sizeof(hw)); | |
261 | memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); | |
262 | ||
263 | hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; | |
264 | #ifdef CONFIG_BLK_DEV_HD | |
265 | if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) | |
266 | hwif->noprobe = 1; /* may be overridden by ide_setup() */ | |
267 | #endif | |
268 | } | |
269 | ||
270 | extern void ide_arm_init(void); | |
271 | ||
272 | /* | |
273 | * init_ide_data() sets reasonable default values into all fields | |
274 | * of all instances of the hwifs and drives, but only on the first call. | |
275 | * Subsequent calls have no effect (they don't wipe out anything). | |
276 | * | |
277 | * This routine is normally called at driver initialization time, | |
278 | * but may also be called MUCH earlier during kernel "command-line" | |
279 | * parameter processing. As such, we cannot depend on any other parts | |
280 | * of the kernel (such as memory allocation) to be functioning yet. | |
281 | * | |
282 | * This is too bad, as otherwise we could dynamically allocate the | |
283 | * ide_drive_t structs as needed, rather than always consuming memory | |
284 | * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. | |
285 | * | |
286 | * FIXME: We should stuff the setup data into __init and copy the | |
287 | * relevant hwifs/allocate them properly during boot. | |
288 | */ | |
289 | #define MAGIC_COOKIE 0x12345678 | |
290 | static void __init init_ide_data (void) | |
291 | { | |
292 | ide_hwif_t *hwif; | |
293 | unsigned int index; | |
294 | static unsigned long magic_cookie = MAGIC_COOKIE; | |
295 | ||
296 | if (magic_cookie != MAGIC_COOKIE) | |
297 | return; /* already initialized */ | |
298 | magic_cookie = 0; | |
299 | ||
300 | /* Initialise all interface structures */ | |
301 | for (index = 0; index < MAX_HWIFS; ++index) { | |
302 | hwif = &ide_hwifs[index]; | |
303 | init_hwif_data(hwif, index); | |
304 | init_hwif_default(hwif, index); | |
305 | #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) | |
306 | hwif->irq = hwif->hw.irq = | |
307 | ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); | |
308 | #endif | |
309 | } | |
310 | #ifdef CONFIG_IDE_ARM | |
311 | initializing = 1; | |
312 | ide_arm_init(); | |
313 | initializing = 0; | |
314 | #endif | |
315 | } | |
316 | ||
317 | /** | |
318 | * ide_system_bus_speed - guess bus speed | |
319 | * | |
320 | * ide_system_bus_speed() returns what we think is the system VESA/PCI | |
321 | * bus speed (in MHz). This is used for calculating interface PIO timings. | |
322 | * The default is 40 for known PCI systems, 50 otherwise. | |
323 | * The "idebus=xx" parameter can be used to override this value. | |
324 | * The actual value to be used is computed/displayed the first time | |
325 | * through. Drivers should only use this as a last resort. | |
326 | * | |
327 | * Returns a guessed speed in MHz. | |
328 | */ | |
329 | ||
330 | static int ide_system_bus_speed(void) | |
331 | { | |
332 | #ifdef CONFIG_PCI | |
333 | static struct pci_device_id pci_default[] = { | |
334 | { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, | |
335 | { } | |
336 | }; | |
337 | #else | |
338 | #define pci_default 0 | |
339 | #endif /* CONFIG_PCI */ | |
340 | ||
341 | if (!system_bus_speed) { | |
342 | if (idebus_parameter) { | |
343 | /* user supplied value */ | |
344 | system_bus_speed = idebus_parameter; | |
345 | } else if (pci_dev_present(pci_default)) { | |
346 | /* safe default value for PCI */ | |
347 | system_bus_speed = 33; | |
348 | } else { | |
349 | /* safe default value for VESA and PCI */ | |
350 | system_bus_speed = 50; | |
351 | } | |
352 | printk(KERN_INFO "ide: Assuming %dMHz system bus speed " | |
353 | "for PIO modes%s\n", system_bus_speed, | |
354 | idebus_parameter ? "" : "; override with idebus=xx"); | |
355 | } | |
356 | return system_bus_speed; | |
357 | } | |
358 | ||
1da177e4 LT |
359 | #ifdef CONFIG_PROC_FS |
360 | struct proc_dir_entry *proc_ide_root; | |
361 | #endif | |
362 | ||
363 | static struct resource* hwif_request_region(ide_hwif_t *hwif, | |
364 | unsigned long addr, int num) | |
365 | { | |
366 | struct resource *res = request_region(addr, num, hwif->name); | |
367 | ||
368 | if (!res) | |
369 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", | |
370 | hwif->name, addr, addr+num-1); | |
371 | return res; | |
372 | } | |
373 | ||
374 | /** | |
375 | * ide_hwif_request_regions - request resources for IDE | |
376 | * @hwif: interface to use | |
377 | * | |
378 | * Requests all the needed resources for an interface. | |
379 | * Right now core IDE code does this work which is deeply wrong. | |
380 | * MMIO leaves it to the controller driver, | |
381 | * PIO will migrate this way over time. | |
382 | */ | |
383 | ||
384 | int ide_hwif_request_regions(ide_hwif_t *hwif) | |
385 | { | |
386 | unsigned long addr; | |
387 | unsigned int i; | |
388 | ||
389 | if (hwif->mmio == 2) | |
390 | return 0; | |
391 | BUG_ON(hwif->mmio == 1); | |
392 | addr = hwif->io_ports[IDE_CONTROL_OFFSET]; | |
393 | if (addr && !hwif_request_region(hwif, addr, 1)) | |
394 | goto control_region_busy; | |
395 | hwif->straight8 = 0; | |
396 | addr = hwif->io_ports[IDE_DATA_OFFSET]; | |
397 | if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { | |
398 | if (!hwif_request_region(hwif, addr, 8)) | |
399 | goto data_region_busy; | |
400 | hwif->straight8 = 1; | |
401 | return 0; | |
402 | } | |
403 | for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { | |
404 | addr = hwif->io_ports[i]; | |
405 | if (!hwif_request_region(hwif, addr, 1)) { | |
406 | while (--i) | |
407 | release_region(addr, 1); | |
408 | goto data_region_busy; | |
409 | } | |
410 | } | |
411 | return 0; | |
412 | ||
413 | data_region_busy: | |
414 | addr = hwif->io_ports[IDE_CONTROL_OFFSET]; | |
415 | if (addr) | |
416 | release_region(addr, 1); | |
417 | control_region_busy: | |
418 | /* If any errors are return, we drop the hwif interface. */ | |
419 | return -EBUSY; | |
420 | } | |
421 | ||
422 | /** | |
423 | * ide_hwif_release_regions - free IDE resources | |
424 | * | |
425 | * Note that we only release the standard ports, | |
426 | * and do not even try to handle any extra ports | |
427 | * allocated for weird IDE interface chipsets. | |
428 | * | |
429 | * Note also that we don't yet handle mmio resources here. More | |
430 | * importantly our caller should be doing this so we need to | |
431 | * restructure this as a helper function for drivers. | |
432 | */ | |
433 | ||
434 | void ide_hwif_release_regions(ide_hwif_t *hwif) | |
435 | { | |
436 | u32 i = 0; | |
437 | ||
438 | if (hwif->mmio == 2) | |
439 | return; | |
440 | if (hwif->io_ports[IDE_CONTROL_OFFSET]) | |
441 | release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); | |
442 | if (hwif->straight8) { | |
443 | release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); | |
444 | return; | |
445 | } | |
446 | for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) | |
447 | if (hwif->io_ports[i]) | |
448 | release_region(hwif->io_ports[i], 1); | |
449 | } | |
450 | ||
451 | /** | |
452 | * ide_hwif_restore - restore hwif to template | |
453 | * @hwif: hwif to update | |
454 | * @tmp_hwif: template | |
455 | * | |
456 | * Restore hwif to a previous state by copying most settngs | |
457 | * from the template. | |
458 | */ | |
459 | ||
460 | static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) | |
461 | { | |
462 | hwif->hwgroup = tmp_hwif->hwgroup; | |
463 | ||
464 | hwif->gendev.parent = tmp_hwif->gendev.parent; | |
465 | ||
466 | hwif->proc = tmp_hwif->proc; | |
467 | ||
468 | hwif->major = tmp_hwif->major; | |
469 | hwif->straight8 = tmp_hwif->straight8; | |
470 | hwif->bus_state = tmp_hwif->bus_state; | |
471 | ||
472 | hwif->atapi_dma = tmp_hwif->atapi_dma; | |
473 | hwif->ultra_mask = tmp_hwif->ultra_mask; | |
474 | hwif->mwdma_mask = tmp_hwif->mwdma_mask; | |
475 | hwif->swdma_mask = tmp_hwif->swdma_mask; | |
476 | ||
477 | hwif->chipset = tmp_hwif->chipset; | |
478 | hwif->hold = tmp_hwif->hold; | |
479 | ||
480 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
481 | hwif->pci_dev = tmp_hwif->pci_dev; | |
482 | hwif->cds = tmp_hwif->cds; | |
483 | #endif | |
484 | ||
485 | hwif->tuneproc = tmp_hwif->tuneproc; | |
486 | hwif->speedproc = tmp_hwif->speedproc; | |
487 | hwif->selectproc = tmp_hwif->selectproc; | |
488 | hwif->reset_poll = tmp_hwif->reset_poll; | |
489 | hwif->pre_reset = tmp_hwif->pre_reset; | |
490 | hwif->resetproc = tmp_hwif->resetproc; | |
491 | hwif->intrproc = tmp_hwif->intrproc; | |
492 | hwif->maskproc = tmp_hwif->maskproc; | |
493 | hwif->quirkproc = tmp_hwif->quirkproc; | |
494 | hwif->busproc = tmp_hwif->busproc; | |
495 | ||
496 | hwif->ata_input_data = tmp_hwif->ata_input_data; | |
497 | hwif->ata_output_data = tmp_hwif->ata_output_data; | |
498 | hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; | |
499 | hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; | |
500 | ||
501 | hwif->dma_setup = tmp_hwif->dma_setup; | |
502 | hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; | |
503 | hwif->dma_start = tmp_hwif->dma_start; | |
504 | hwif->ide_dma_end = tmp_hwif->ide_dma_end; | |
505 | hwif->ide_dma_check = tmp_hwif->ide_dma_check; | |
506 | hwif->ide_dma_on = tmp_hwif->ide_dma_on; | |
507 | hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly; | |
508 | hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; | |
509 | hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on; | |
510 | hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off; | |
511 | hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq; | |
512 | hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout; | |
513 | ||
514 | hwif->OUTB = tmp_hwif->OUTB; | |
515 | hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; | |
516 | hwif->OUTW = tmp_hwif->OUTW; | |
517 | hwif->OUTL = tmp_hwif->OUTL; | |
518 | hwif->OUTSW = tmp_hwif->OUTSW; | |
519 | hwif->OUTSL = tmp_hwif->OUTSL; | |
520 | ||
521 | hwif->INB = tmp_hwif->INB; | |
522 | hwif->INW = tmp_hwif->INW; | |
523 | hwif->INL = tmp_hwif->INL; | |
524 | hwif->INSW = tmp_hwif->INSW; | |
525 | hwif->INSL = tmp_hwif->INSL; | |
526 | ||
527 | hwif->sg_max_nents = tmp_hwif->sg_max_nents; | |
528 | ||
529 | hwif->mmio = tmp_hwif->mmio; | |
530 | hwif->rqsize = tmp_hwif->rqsize; | |
531 | hwif->no_lba48 = tmp_hwif->no_lba48; | |
532 | ||
533 | #ifndef CONFIG_BLK_DEV_IDECS | |
534 | hwif->irq = tmp_hwif->irq; | |
535 | #endif | |
536 | ||
537 | hwif->dma_base = tmp_hwif->dma_base; | |
538 | hwif->dma_master = tmp_hwif->dma_master; | |
539 | hwif->dma_command = tmp_hwif->dma_command; | |
540 | hwif->dma_vendor1 = tmp_hwif->dma_vendor1; | |
541 | hwif->dma_status = tmp_hwif->dma_status; | |
542 | hwif->dma_vendor3 = tmp_hwif->dma_vendor3; | |
543 | hwif->dma_prdtable = tmp_hwif->dma_prdtable; | |
544 | ||
545 | hwif->dma_extra = tmp_hwif->dma_extra; | |
546 | hwif->config_data = tmp_hwif->config_data; | |
547 | hwif->select_data = tmp_hwif->select_data; | |
548 | hwif->autodma = tmp_hwif->autodma; | |
549 | hwif->udma_four = tmp_hwif->udma_four; | |
550 | hwif->no_dsc = tmp_hwif->no_dsc; | |
551 | ||
552 | hwif->hwif_data = tmp_hwif->hwif_data; | |
553 | } | |
554 | ||
555 | /** | |
556 | * ide_unregister - free an ide interface | |
557 | * @index: index of interface (will change soon to a pointer) | |
558 | * | |
559 | * Perform the final unregister of an IDE interface. At the moment | |
560 | * we don't refcount interfaces so this will also get split up. | |
561 | * | |
562 | * Locking: | |
563 | * The caller must not hold the IDE locks | |
564 | * The drive present/vanishing is not yet properly locked | |
565 | * Take care with the callbacks. These have been split to avoid | |
566 | * deadlocking the IDE layer. The shutdown callback is called | |
567 | * before we take the lock and free resources. It is up to the | |
568 | * caller to be sure there is no pending I/O here, and that | |
569 | * the interfce will not be reopened (present/vanishing locking | |
570 | * isnt yet done btw). After we commit to the final kill we | |
571 | * call the cleanup callback with the ide locks held. | |
572 | * | |
573 | * Unregister restores the hwif structures to the default state. | |
574 | * This is raving bonkers. | |
575 | */ | |
576 | ||
577 | void ide_unregister(unsigned int index) | |
578 | { | |
579 | ide_drive_t *drive; | |
580 | ide_hwif_t *hwif, *g; | |
581 | static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */ | |
582 | ide_hwgroup_t *hwgroup; | |
8604affd | 583 | int irq_count = 0, unit; |
1da177e4 LT |
584 | |
585 | BUG_ON(index >= MAX_HWIFS); | |
586 | ||
587 | BUG_ON(in_interrupt()); | |
588 | BUG_ON(irqs_disabled()); | |
589 | down(&ide_cfg_sem); | |
590 | spin_lock_irq(&ide_lock); | |
591 | hwif = &ide_hwifs[index]; | |
592 | if (!hwif->present) | |
593 | goto abort; | |
594 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
595 | drive = &hwif->drives[unit]; | |
8604affd BZ |
596 | if (!drive->present) { |
597 | if (drive->devfs_name[0] != '\0') { | |
598 | devfs_remove(drive->devfs_name); | |
599 | drive->devfs_name[0] = '\0'; | |
600 | } | |
1da177e4 | 601 | continue; |
8604affd BZ |
602 | } |
603 | spin_unlock_irq(&ide_lock); | |
604 | device_unregister(&drive->gendev); | |
605 | down(&drive->gendev_rel_sem); | |
606 | spin_lock_irq(&ide_lock); | |
1da177e4 LT |
607 | } |
608 | hwif->present = 0; | |
609 | ||
610 | spin_unlock_irq(&ide_lock); | |
611 | ||
1da177e4 LT |
612 | destroy_proc_ide_interface(hwif); |
613 | ||
614 | hwgroup = hwif->hwgroup; | |
615 | /* | |
616 | * free the irq if we were the only hwif using it | |
617 | */ | |
618 | g = hwgroup->hwif; | |
619 | do { | |
620 | if (g->irq == hwif->irq) | |
621 | ++irq_count; | |
622 | g = g->next; | |
623 | } while (g != hwgroup->hwif); | |
624 | if (irq_count == 1) | |
625 | free_irq(hwif->irq, hwgroup); | |
626 | ||
627 | spin_lock_irq(&ide_lock); | |
628 | /* | |
629 | * Note that we only release the standard ports, | |
630 | * and do not even try to handle any extra ports | |
631 | * allocated for weird IDE interface chipsets. | |
632 | */ | |
633 | ide_hwif_release_regions(hwif); | |
634 | ||
635 | /* | |
636 | * Remove us from the hwgroup, and free | |
637 | * the hwgroup if we were the only member | |
638 | */ | |
1da177e4 LT |
639 | if (hwif->next == hwif) { |
640 | BUG_ON(hwgroup->hwif != hwif); | |
641 | kfree(hwgroup); | |
642 | } else { | |
643 | /* There is another interface in hwgroup. | |
644 | * Unlink us, and set hwgroup->drive and ->hwif to | |
645 | * something sane. | |
646 | */ | |
647 | g = hwgroup->hwif; | |
648 | while (g->next != hwif) | |
649 | g = g->next; | |
650 | g->next = hwif->next; | |
651 | if (hwgroup->hwif == hwif) { | |
652 | /* Chose a random hwif for hwgroup->hwif. | |
653 | * It's guaranteed that there are no drives | |
654 | * left in the hwgroup. | |
655 | */ | |
656 | BUG_ON(hwgroup->drive != NULL); | |
657 | hwgroup->hwif = g; | |
658 | } | |
659 | BUG_ON(hwgroup->hwif == hwif); | |
660 | } | |
661 | ||
662 | /* More messed up locking ... */ | |
663 | spin_unlock_irq(&ide_lock); | |
664 | device_unregister(&hwif->gendev); | |
665 | down(&hwif->gendev_rel_sem); | |
666 | ||
667 | /* | |
668 | * Remove us from the kernel's knowledge | |
669 | */ | |
670 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
671 | kfree(hwif->sg_table); | |
672 | unregister_blkdev(hwif->major, hwif->name); | |
673 | spin_lock_irq(&ide_lock); | |
674 | ||
675 | if (hwif->dma_base) { | |
676 | (void) ide_release_dma(hwif); | |
677 | ||
678 | hwif->dma_base = 0; | |
679 | hwif->dma_master = 0; | |
680 | hwif->dma_command = 0; | |
681 | hwif->dma_vendor1 = 0; | |
682 | hwif->dma_status = 0; | |
683 | hwif->dma_vendor3 = 0; | |
684 | hwif->dma_prdtable = 0; | |
685 | } | |
686 | ||
687 | /* copy original settings */ | |
688 | tmp_hwif = *hwif; | |
689 | ||
690 | /* restore hwif data to pristine status */ | |
691 | init_hwif_data(hwif, index); | |
692 | init_hwif_default(hwif, index); | |
693 | ||
694 | ide_hwif_restore(hwif, &tmp_hwif); | |
695 | ||
696 | abort: | |
697 | spin_unlock_irq(&ide_lock); | |
698 | up(&ide_cfg_sem); | |
699 | } | |
700 | ||
701 | EXPORT_SYMBOL(ide_unregister); | |
702 | ||
703 | ||
704 | /** | |
705 | * ide_setup_ports - set up IDE interface ports | |
706 | * @hw: register descriptions | |
707 | * @base: base register | |
708 | * @offsets: table of register offsets | |
709 | * @ctrl: control register | |
710 | * @ack_irq: IRQ ack | |
711 | * @irq: interrupt lie | |
712 | * | |
713 | * Setup hw_regs_t structure described by parameters. You | |
714 | * may set up the hw structure yourself OR use this routine to | |
715 | * do it for you. This is basically a helper | |
716 | * | |
717 | */ | |
718 | ||
719 | void ide_setup_ports ( hw_regs_t *hw, | |
720 | unsigned long base, int *offsets, | |
721 | unsigned long ctrl, unsigned long intr, | |
722 | ide_ack_intr_t *ack_intr, | |
723 | /* | |
724 | * ide_io_ops_t *iops, | |
725 | */ | |
726 | int irq) | |
727 | { | |
728 | int i; | |
729 | ||
730 | for (i = 0; i < IDE_NR_PORTS; i++) { | |
731 | if (offsets[i] == -1) { | |
732 | switch(i) { | |
733 | case IDE_CONTROL_OFFSET: | |
734 | hw->io_ports[i] = ctrl; | |
735 | break; | |
736 | #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) | |
737 | case IDE_IRQ_OFFSET: | |
738 | hw->io_ports[i] = intr; | |
739 | break; | |
740 | #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ | |
741 | default: | |
742 | hw->io_ports[i] = 0; | |
743 | break; | |
744 | } | |
745 | } else { | |
746 | hw->io_ports[i] = base + offsets[i]; | |
747 | } | |
748 | } | |
749 | hw->irq = irq; | |
750 | hw->dma = NO_DMA; | |
751 | hw->ack_intr = ack_intr; | |
752 | /* | |
753 | * hw->iops = iops; | |
754 | */ | |
755 | } | |
756 | ||
757 | /** | |
758 | * ide_register_hw_with_fixup - register IDE interface | |
759 | * @hw: hardware registers | |
760 | * @hwifp: pointer to returned hwif | |
761 | * @fixup: fixup function | |
762 | * | |
763 | * Register an IDE interface, specifying exactly the registers etc. | |
764 | * Set init=1 iff calling before probes have taken place. | |
765 | * | |
766 | * Returns -1 on error. | |
767 | */ | |
768 | ||
769 | int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif)) | |
770 | { | |
771 | int index, retry = 1; | |
772 | ide_hwif_t *hwif; | |
773 | ||
774 | do { | |
775 | for (index = 0; index < MAX_HWIFS; ++index) { | |
776 | hwif = &ide_hwifs[index]; | |
777 | if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET]) | |
778 | goto found; | |
779 | } | |
780 | for (index = 0; index < MAX_HWIFS; ++index) { | |
781 | hwif = &ide_hwifs[index]; | |
782 | if (hwif->hold) | |
783 | continue; | |
784 | if ((!hwif->present && !hwif->mate && !initializing) || | |
785 | (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing)) | |
786 | goto found; | |
787 | } | |
788 | for (index = 0; index < MAX_HWIFS; index++) | |
789 | ide_unregister(index); | |
790 | } while (retry--); | |
791 | return -1; | |
792 | found: | |
793 | if (hwif->present) | |
794 | ide_unregister(index); | |
795 | else if (!hwif->hold) { | |
796 | init_hwif_data(hwif, index); | |
797 | init_hwif_default(hwif, index); | |
798 | } | |
799 | if (hwif->present) | |
800 | return -1; | |
801 | memcpy(&hwif->hw, hw, sizeof(*hw)); | |
802 | memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports)); | |
803 | hwif->irq = hw->irq; | |
804 | hwif->noprobe = 0; | |
805 | hwif->chipset = hw->chipset; | |
806 | ||
807 | if (!initializing) { | |
808 | probe_hwif_init_with_fixup(hwif, fixup); | |
809 | create_proc_ide_interfaces(); | |
810 | } | |
811 | ||
812 | if (hwifp) | |
813 | *hwifp = hwif; | |
814 | ||
815 | return (initializing || hwif->present) ? index : -1; | |
816 | } | |
817 | ||
818 | EXPORT_SYMBOL(ide_register_hw_with_fixup); | |
819 | ||
820 | int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp) | |
821 | { | |
822 | return ide_register_hw_with_fixup(hw, hwifp, NULL); | |
823 | } | |
824 | ||
825 | EXPORT_SYMBOL(ide_register_hw); | |
826 | ||
827 | /* | |
828 | * Locks for IDE setting functionality | |
829 | */ | |
830 | ||
831 | DECLARE_MUTEX(ide_setting_sem); | |
832 | ||
833 | /** | |
834 | * __ide_add_setting - add an ide setting option | |
835 | * @drive: drive to use | |
836 | * @name: setting name | |
837 | * @rw: true if the function is read write | |
838 | * @read_ioctl: function to call on read | |
839 | * @write_ioctl: function to call on write | |
840 | * @data_type: type of data | |
841 | * @min: range minimum | |
842 | * @max: range maximum | |
843 | * @mul_factor: multiplication scale | |
844 | * @div_factor: divison scale | |
845 | * @data: private data field | |
846 | * @set: setting | |
847 | * @auto_remove: setting auto removal flag | |
848 | * | |
849 | * Removes the setting named from the device if it is present. | |
850 | * The function takes the settings_lock to protect against | |
851 | * parallel changes. This function must not be called from IRQ | |
852 | * context. Returns 0 on success or -1 on failure. | |
853 | * | |
854 | * BUGS: This code is seriously over-engineered. There is also | |
855 | * magic about how the driver specific features are setup. If | |
856 | * a driver is attached we assume the driver settings are auto | |
857 | * remove. | |
858 | */ | |
859 | ||
860 | static int __ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set, int auto_remove) | |
861 | { | |
862 | ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL; | |
863 | ||
864 | down(&ide_setting_sem); | |
865 | while ((*p) && strcmp((*p)->name, name) < 0) | |
866 | p = &((*p)->next); | |
f5e3c2fa | 867 | if ((setting = kzalloc(sizeof(*setting), GFP_KERNEL)) == NULL) |
1da177e4 | 868 | goto abort; |
1da177e4 LT |
869 | if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL) |
870 | goto abort; | |
871 | strcpy(setting->name, name); | |
872 | setting->rw = rw; | |
873 | setting->read_ioctl = read_ioctl; | |
874 | setting->write_ioctl = write_ioctl; | |
875 | setting->data_type = data_type; | |
876 | setting->min = min; | |
877 | setting->max = max; | |
878 | setting->mul_factor = mul_factor; | |
879 | setting->div_factor = div_factor; | |
880 | setting->data = data; | |
881 | setting->set = set; | |
882 | ||
883 | setting->next = *p; | |
884 | if (auto_remove) | |
885 | setting->auto_remove = 1; | |
886 | *p = setting; | |
887 | up(&ide_setting_sem); | |
888 | return 0; | |
889 | abort: | |
890 | up(&ide_setting_sem); | |
6044ec88 | 891 | kfree(setting); |
1da177e4 LT |
892 | return -1; |
893 | } | |
894 | ||
895 | int ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set) | |
896 | { | |
897 | return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1); | |
898 | } | |
899 | ||
900 | EXPORT_SYMBOL(ide_add_setting); | |
901 | ||
902 | /** | |
903 | * __ide_remove_setting - remove an ide setting option | |
904 | * @drive: drive to use | |
905 | * @name: setting name | |
906 | * | |
907 | * Removes the setting named from the device if it is present. | |
908 | * The caller must hold the setting semaphore. | |
909 | */ | |
910 | ||
911 | static void __ide_remove_setting (ide_drive_t *drive, char *name) | |
912 | { | |
913 | ide_settings_t **p, *setting; | |
914 | ||
915 | p = (ide_settings_t **) &drive->settings; | |
916 | ||
917 | while ((*p) && strcmp((*p)->name, name)) | |
918 | p = &((*p)->next); | |
919 | if ((setting = (*p)) == NULL) | |
920 | return; | |
921 | ||
922 | (*p) = setting->next; | |
923 | ||
924 | kfree(setting->name); | |
925 | kfree(setting); | |
926 | } | |
927 | ||
928 | /** | |
929 | * ide_find_setting_by_ioctl - find a drive specific ioctl | |
930 | * @drive: drive to scan | |
931 | * @cmd: ioctl command to handle | |
932 | * | |
933 | * Scan's the device setting table for a matching entry and returns | |
934 | * this or NULL if no entry is found. The caller must hold the | |
935 | * setting semaphore | |
936 | */ | |
937 | ||
938 | static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd) | |
939 | { | |
940 | ide_settings_t *setting = drive->settings; | |
941 | ||
942 | while (setting) { | |
943 | if (setting->read_ioctl == cmd || setting->write_ioctl == cmd) | |
944 | break; | |
945 | setting = setting->next; | |
946 | } | |
947 | ||
948 | return setting; | |
949 | } | |
950 | ||
951 | /** | |
952 | * ide_find_setting_by_name - find a drive specific setting | |
953 | * @drive: drive to scan | |
954 | * @name: setting name | |
955 | * | |
956 | * Scan's the device setting table for a matching entry and returns | |
957 | * this or NULL if no entry is found. The caller must hold the | |
958 | * setting semaphore | |
959 | */ | |
960 | ||
961 | ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name) | |
962 | { | |
963 | ide_settings_t *setting = drive->settings; | |
964 | ||
965 | while (setting) { | |
966 | if (strcmp(setting->name, name) == 0) | |
967 | break; | |
968 | setting = setting->next; | |
969 | } | |
970 | return setting; | |
971 | } | |
972 | ||
973 | /** | |
974 | * auto_remove_settings - remove driver specific settings | |
975 | * @drive: drive | |
976 | * | |
977 | * Automatically remove all the driver specific settings for this | |
978 | * drive. This function may sleep and must not be called from IRQ | |
979 | * context. The caller must hold ide_setting_sem. | |
980 | */ | |
981 | ||
982 | static void auto_remove_settings (ide_drive_t *drive) | |
983 | { | |
984 | ide_settings_t *setting; | |
985 | repeat: | |
986 | setting = drive->settings; | |
987 | while (setting) { | |
988 | if (setting->auto_remove) { | |
989 | __ide_remove_setting(drive, setting->name); | |
990 | goto repeat; | |
991 | } | |
992 | setting = setting->next; | |
993 | } | |
994 | } | |
995 | ||
996 | /** | |
997 | * ide_read_setting - read an IDE setting | |
998 | * @drive: drive to read from | |
999 | * @setting: drive setting | |
1000 | * | |
1001 | * Read a drive setting and return the value. The caller | |
1002 | * must hold the ide_setting_sem when making this call. | |
1003 | * | |
1004 | * BUGS: the data return and error are the same return value | |
1005 | * so an error -EINVAL and true return of the same value cannot | |
1006 | * be told apart | |
1007 | */ | |
1008 | ||
1009 | int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting) | |
1010 | { | |
1011 | int val = -EINVAL; | |
1012 | unsigned long flags; | |
1013 | ||
1014 | if ((setting->rw & SETTING_READ)) { | |
1015 | spin_lock_irqsave(&ide_lock, flags); | |
1016 | switch(setting->data_type) { | |
1017 | case TYPE_BYTE: | |
1018 | val = *((u8 *) setting->data); | |
1019 | break; | |
1020 | case TYPE_SHORT: | |
1021 | val = *((u16 *) setting->data); | |
1022 | break; | |
1023 | case TYPE_INT: | |
1024 | case TYPE_INTA: | |
1025 | val = *((u32 *) setting->data); | |
1026 | break; | |
1027 | } | |
1028 | spin_unlock_irqrestore(&ide_lock, flags); | |
1029 | } | |
1030 | return val; | |
1031 | } | |
1032 | ||
1033 | /** | |
1034 | * ide_spin_wait_hwgroup - wait for group | |
1035 | * @drive: drive in the group | |
1036 | * | |
1037 | * Wait for an IDE device group to go non busy and then return | |
1038 | * holding the ide_lock which guards the hwgroup->busy status | |
1039 | * and right to use it. | |
1040 | */ | |
1041 | ||
1042 | int ide_spin_wait_hwgroup (ide_drive_t *drive) | |
1043 | { | |
1044 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
1045 | unsigned long timeout = jiffies + (3 * HZ); | |
1046 | ||
1047 | spin_lock_irq(&ide_lock); | |
1048 | ||
1049 | while (hwgroup->busy) { | |
1050 | unsigned long lflags; | |
1051 | spin_unlock_irq(&ide_lock); | |
1052 | local_irq_set(lflags); | |
1053 | if (time_after(jiffies, timeout)) { | |
1054 | local_irq_restore(lflags); | |
1055 | printk(KERN_ERR "%s: channel busy\n", drive->name); | |
1056 | return -EBUSY; | |
1057 | } | |
1058 | local_irq_restore(lflags); | |
1059 | spin_lock_irq(&ide_lock); | |
1060 | } | |
1061 | return 0; | |
1062 | } | |
1063 | ||
1064 | EXPORT_SYMBOL(ide_spin_wait_hwgroup); | |
1065 | ||
1066 | /** | |
1067 | * ide_write_setting - read an IDE setting | |
1068 | * @drive: drive to read from | |
1069 | * @setting: drive setting | |
1070 | * @val: value | |
1071 | * | |
1072 | * Write a drive setting if it is possible. The caller | |
1073 | * must hold the ide_setting_sem when making this call. | |
1074 | * | |
1075 | * BUGS: the data return and error are the same return value | |
1076 | * so an error -EINVAL and true return of the same value cannot | |
1077 | * be told apart | |
1078 | * | |
1079 | * FIXME: This should be changed to enqueue a special request | |
1080 | * to the driver to change settings, and then wait on a sema for completion. | |
1081 | * The current scheme of polling is kludgy, though safe enough. | |
1082 | */ | |
1083 | ||
1084 | int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val) | |
1085 | { | |
1086 | int i; | |
1087 | u32 *p; | |
1088 | ||
1089 | if (!capable(CAP_SYS_ADMIN)) | |
1090 | return -EACCES; | |
1091 | if (!(setting->rw & SETTING_WRITE)) | |
1092 | return -EPERM; | |
1093 | if (val < setting->min || val > setting->max) | |
1094 | return -EINVAL; | |
1095 | if (setting->set) | |
1096 | return setting->set(drive, val); | |
1097 | if (ide_spin_wait_hwgroup(drive)) | |
1098 | return -EBUSY; | |
1099 | switch (setting->data_type) { | |
1100 | case TYPE_BYTE: | |
1101 | *((u8 *) setting->data) = val; | |
1102 | break; | |
1103 | case TYPE_SHORT: | |
1104 | *((u16 *) setting->data) = val; | |
1105 | break; | |
1106 | case TYPE_INT: | |
1107 | *((u32 *) setting->data) = val; | |
1108 | break; | |
1109 | case TYPE_INTA: | |
1110 | p = (u32 *) setting->data; | |
1111 | for (i = 0; i < 1 << PARTN_BITS; i++, p++) | |
1112 | *p = val; | |
1113 | break; | |
1114 | } | |
1115 | spin_unlock_irq(&ide_lock); | |
1116 | return 0; | |
1117 | } | |
1118 | ||
1119 | static int set_io_32bit(ide_drive_t *drive, int arg) | |
1120 | { | |
1121 | drive->io_32bit = arg; | |
1122 | #ifdef CONFIG_BLK_DEV_DTC2278 | |
1123 | if (HWIF(drive)->chipset == ide_dtc2278) | |
1124 | HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg; | |
1125 | #endif /* CONFIG_BLK_DEV_DTC2278 */ | |
1126 | return 0; | |
1127 | } | |
1128 | ||
1129 | static int set_using_dma (ide_drive_t *drive, int arg) | |
1130 | { | |
1131 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
1132 | if (!drive->id || !(drive->id->capability & 1)) | |
1133 | return -EPERM; | |
1134 | if (HWIF(drive)->ide_dma_check == NULL) | |
1135 | return -EPERM; | |
1136 | if (arg) { | |
1137 | if (HWIF(drive)->ide_dma_check(drive)) return -EIO; | |
1138 | if (HWIF(drive)->ide_dma_on(drive)) return -EIO; | |
1139 | } else { | |
1140 | if (__ide_dma_off(drive)) | |
1141 | return -EIO; | |
1142 | } | |
1143 | return 0; | |
1144 | #else | |
1145 | return -EPERM; | |
1146 | #endif | |
1147 | } | |
1148 | ||
1149 | static int set_pio_mode (ide_drive_t *drive, int arg) | |
1150 | { | |
1151 | struct request rq; | |
1152 | ||
1153 | if (!HWIF(drive)->tuneproc) | |
1154 | return -ENOSYS; | |
1155 | if (drive->special.b.set_tune) | |
1156 | return -EBUSY; | |
1157 | ide_init_drive_cmd(&rq); | |
1158 | drive->tune_req = (u8) arg; | |
1159 | drive->special.b.set_tune = 1; | |
1160 | (void) ide_do_drive_cmd(drive, &rq, ide_wait); | |
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | static int set_xfer_rate (ide_drive_t *drive, int arg) | |
1165 | { | |
1166 | int err = ide_wait_cmd(drive, | |
1167 | WIN_SETFEATURES, (u8) arg, | |
1168 | SETFEATURES_XFER, 0, NULL); | |
1169 | ||
1170 | if (!err && arg) { | |
1171 | ide_set_xfer_rate(drive, (u8) arg); | |
1172 | ide_driveid_update(drive); | |
1173 | } | |
1174 | return err; | |
1175 | } | |
1176 | ||
1177 | /** | |
1178 | * ide_add_generic_settings - generic ide settings | |
1179 | * @drive: drive being configured | |
1180 | * | |
1181 | * Add the generic parts of the system settings to the /proc files and | |
1182 | * ioctls for this IDE device. The caller must not be holding the | |
1183 | * ide_setting_sem. | |
1184 | */ | |
1185 | ||
1186 | void ide_add_generic_settings (ide_drive_t *drive) | |
1187 | { | |
1188 | /* | |
1189 | * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function | |
1190 | */ | |
1191 | __ide_add_setting(drive, "io_32bit", drive->no_io_32bit ? SETTING_READ : SETTING_RW, HDIO_GET_32BIT, HDIO_SET_32BIT, TYPE_BYTE, 0, 1 + (SUPPORT_VLB_SYNC << 1), 1, 1, &drive->io_32bit, set_io_32bit, 0); | |
1192 | __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0); | |
1193 | __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0); | |
1194 | __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0); | |
1195 | __ide_add_setting(drive, "unmaskirq", drive->no_unmask ? SETTING_READ : SETTING_RW, HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, TYPE_BYTE, 0, 1, 1, 1, &drive->unmask, NULL, 0); | |
1196 | __ide_add_setting(drive, "using_dma", SETTING_RW, HDIO_GET_DMA, HDIO_SET_DMA, TYPE_BYTE, 0, 1, 1, 1, &drive->using_dma, set_using_dma, 0); | |
1197 | __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0); | |
1198 | __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0); | |
1199 | __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0); | |
1200 | } | |
1201 | ||
1202 | /** | |
1203 | * system_bus_clock - clock guess | |
1204 | * | |
1205 | * External version of the bus clock guess used by very old IDE drivers | |
1206 | * for things like VLB timings. Should not be used. | |
1207 | */ | |
1208 | ||
1209 | int system_bus_clock (void) | |
1210 | { | |
1211 | return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed )); | |
1212 | } | |
1213 | ||
1214 | EXPORT_SYMBOL(system_bus_clock); | |
1215 | ||
1da177e4 LT |
1216 | static int generic_ide_suspend(struct device *dev, pm_message_t state) |
1217 | { | |
1218 | ide_drive_t *drive = dev->driver_data; | |
1219 | struct request rq; | |
1220 | struct request_pm_state rqpm; | |
1221 | ide_task_t args; | |
1222 | ||
1223 | memset(&rq, 0, sizeof(rq)); | |
1224 | memset(&rqpm, 0, sizeof(rqpm)); | |
1225 | memset(&args, 0, sizeof(args)); | |
1226 | rq.flags = REQ_PM_SUSPEND; | |
1227 | rq.special = &args; | |
1228 | rq.pm = &rqpm; | |
1229 | rqpm.pm_step = ide_pm_state_start_suspend; | |
ca078bae | 1230 | rqpm.pm_state = state.event; |
1da177e4 LT |
1231 | |
1232 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
1233 | } | |
1234 | ||
1235 | static int generic_ide_resume(struct device *dev) | |
1236 | { | |
1237 | ide_drive_t *drive = dev->driver_data; | |
1238 | struct request rq; | |
1239 | struct request_pm_state rqpm; | |
1240 | ide_task_t args; | |
1241 | ||
1242 | memset(&rq, 0, sizeof(rq)); | |
1243 | memset(&rqpm, 0, sizeof(rqpm)); | |
1244 | memset(&args, 0, sizeof(args)); | |
1245 | rq.flags = REQ_PM_RESUME; | |
1246 | rq.special = &args; | |
1247 | rq.pm = &rqpm; | |
1248 | rqpm.pm_step = ide_pm_state_start_resume; | |
ca078bae | 1249 | rqpm.pm_state = PM_EVENT_ON; |
1da177e4 LT |
1250 | |
1251 | return ide_do_drive_cmd(drive, &rq, ide_head_wait); | |
1252 | } | |
1253 | ||
1254 | int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, | |
1255 | unsigned int cmd, unsigned long arg) | |
1256 | { | |
1257 | ide_settings_t *setting; | |
1258 | ide_driver_t *drv; | |
1259 | int err = 0; | |
1260 | void __user *p = (void __user *)arg; | |
1261 | ||
1262 | down(&ide_setting_sem); | |
1263 | if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) { | |
1264 | if (cmd == setting->read_ioctl) { | |
1265 | err = ide_read_setting(drive, setting); | |
1266 | up(&ide_setting_sem); | |
1267 | return err >= 0 ? put_user(err, (long __user *)arg) : err; | |
1268 | } else { | |
1269 | if (bdev != bdev->bd_contains) | |
1270 | err = -EINVAL; | |
1271 | else | |
1272 | err = ide_write_setting(drive, setting, arg); | |
1273 | up(&ide_setting_sem); | |
1274 | return err; | |
1275 | } | |
1276 | } | |
1277 | up(&ide_setting_sem); | |
1278 | ||
1279 | switch (cmd) { | |
1280 | case HDIO_GETGEO: | |
1281 | { | |
1282 | struct hd_geometry geom; | |
1283 | if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL; | |
1284 | geom.heads = drive->bios_head; | |
1285 | geom.sectors = drive->bios_sect; | |
1286 | geom.cylinders = (u16)drive->bios_cyl; /* truncate */ | |
1287 | geom.start = get_start_sect(bdev); | |
1288 | if (copy_to_user(p, &geom, sizeof(struct hd_geometry))) | |
1289 | return -EFAULT; | |
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | case HDIO_OBSOLETE_IDENTITY: | |
1294 | case HDIO_GET_IDENTITY: | |
1295 | if (bdev != bdev->bd_contains) | |
1296 | return -EINVAL; | |
1297 | if (drive->id_read == 0) | |
1298 | return -ENOMSG; | |
1299 | if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) | |
1300 | return -EFAULT; | |
1301 | return 0; | |
1302 | ||
1303 | case HDIO_GET_NICE: | |
1304 | return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | | |
1305 | drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | | |
1306 | drive->nice0 << IDE_NICE_0 | | |
1307 | drive->nice1 << IDE_NICE_1 | | |
1308 | drive->nice2 << IDE_NICE_2, | |
1309 | (long __user *) arg); | |
1310 | ||
1311 | #ifdef CONFIG_IDE_TASK_IOCTL | |
1312 | case HDIO_DRIVE_TASKFILE: | |
1313 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
1314 | return -EACCES; | |
1315 | switch(drive->media) { | |
1316 | case ide_disk: | |
1317 | return ide_taskfile_ioctl(drive, cmd, arg); | |
1318 | default: | |
1319 | return -ENOMSG; | |
1320 | } | |
1321 | #endif /* CONFIG_IDE_TASK_IOCTL */ | |
1322 | ||
1323 | case HDIO_DRIVE_CMD: | |
1324 | if (!capable(CAP_SYS_RAWIO)) | |
1325 | return -EACCES; | |
1326 | return ide_cmd_ioctl(drive, cmd, arg); | |
1327 | ||
1328 | case HDIO_DRIVE_TASK: | |
1329 | if (!capable(CAP_SYS_RAWIO)) | |
1330 | return -EACCES; | |
1331 | return ide_task_ioctl(drive, cmd, arg); | |
1332 | ||
1333 | case HDIO_SCAN_HWIF: | |
1334 | { | |
1335 | hw_regs_t hw; | |
1336 | int args[3]; | |
1337 | if (!capable(CAP_SYS_RAWIO)) return -EACCES; | |
1338 | if (copy_from_user(args, p, 3 * sizeof(int))) | |
1339 | return -EFAULT; | |
1340 | memset(&hw, 0, sizeof(hw)); | |
1341 | ide_init_hwif_ports(&hw, (unsigned long) args[0], | |
1342 | (unsigned long) args[1], NULL); | |
1343 | hw.irq = args[2]; | |
1344 | if (ide_register_hw(&hw, NULL) == -1) | |
1345 | return -EIO; | |
1346 | return 0; | |
1347 | } | |
1348 | case HDIO_UNREGISTER_HWIF: | |
1349 | if (!capable(CAP_SYS_RAWIO)) return -EACCES; | |
1350 | /* (arg > MAX_HWIFS) checked in function */ | |
1351 | ide_unregister(arg); | |
1352 | return 0; | |
1353 | case HDIO_SET_NICE: | |
1354 | if (!capable(CAP_SYS_ADMIN)) return -EACCES; | |
1355 | if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) | |
1356 | return -EPERM; | |
1357 | drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; | |
1358 | drv = *(ide_driver_t **)bdev->bd_disk->private_data; | |
1359 | if (drive->dsc_overlap && !drv->supports_dsc_overlap) { | |
1360 | drive->dsc_overlap = 0; | |
1361 | return -EPERM; | |
1362 | } | |
1363 | drive->nice1 = (arg >> IDE_NICE_1) & 1; | |
1364 | return 0; | |
1365 | case HDIO_DRIVE_RESET: | |
1366 | { | |
1367 | unsigned long flags; | |
1368 | if (!capable(CAP_SYS_ADMIN)) return -EACCES; | |
1369 | ||
1370 | /* | |
1371 | * Abort the current command on the | |
1372 | * group if there is one, taking | |
1373 | * care not to allow anything else | |
1374 | * to be queued and to die on the | |
1375 | * spot if we miss one somehow | |
1376 | */ | |
1377 | ||
1378 | spin_lock_irqsave(&ide_lock, flags); | |
1379 | ||
1380 | ide_abort(drive, "drive reset"); | |
1381 | ||
1382 | if(HWGROUP(drive)->handler) | |
1383 | BUG(); | |
1384 | ||
1385 | /* Ensure nothing gets queued after we | |
1386 | drop the lock. Reset will clear the busy */ | |
1387 | ||
1388 | HWGROUP(drive)->busy = 1; | |
1389 | spin_unlock_irqrestore(&ide_lock, flags); | |
1390 | (void) ide_do_reset(drive); | |
1391 | ||
1392 | return 0; | |
1393 | } | |
1394 | ||
1395 | case CDROMEJECT: | |
1396 | case CDROMCLOSETRAY: | |
1397 | return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p); | |
1398 | ||
1399 | case HDIO_GET_BUSSTATE: | |
1400 | if (!capable(CAP_SYS_ADMIN)) | |
1401 | return -EACCES; | |
1402 | if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) | |
1403 | return -EFAULT; | |
1404 | return 0; | |
1405 | ||
1406 | case HDIO_SET_BUSSTATE: | |
1407 | if (!capable(CAP_SYS_ADMIN)) | |
1408 | return -EACCES; | |
1409 | if (HWIF(drive)->busproc) | |
1410 | return HWIF(drive)->busproc(drive, (int)arg); | |
1411 | return -EOPNOTSUPP; | |
1412 | default: | |
1413 | return -EINVAL; | |
1414 | } | |
1415 | } | |
1416 | ||
1417 | EXPORT_SYMBOL(generic_ide_ioctl); | |
1418 | ||
1419 | /* | |
1420 | * stridx() returns the offset of c within s, | |
1421 | * or -1 if c is '\0' or not found within s. | |
1422 | */ | |
1423 | static int __init stridx (const char *s, char c) | |
1424 | { | |
1425 | char *i = strchr(s, c); | |
1426 | return (i && c) ? i - s : -1; | |
1427 | } | |
1428 | ||
1429 | /* | |
1430 | * match_parm() does parsing for ide_setup(): | |
1431 | * | |
1432 | * 1. the first char of s must be '='. | |
1433 | * 2. if the remainder matches one of the supplied keywords, | |
1434 | * the index (1 based) of the keyword is negated and returned. | |
1435 | * 3. if the remainder is a series of no more than max_vals numbers | |
1436 | * separated by commas, the numbers are saved in vals[] and a | |
1437 | * count of how many were saved is returned. Base10 is assumed, | |
1438 | * and base16 is allowed when prefixed with "0x". | |
1439 | * 4. otherwise, zero is returned. | |
1440 | */ | |
1441 | static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) | |
1442 | { | |
1443 | static const char *decimal = "0123456789"; | |
1444 | static const char *hex = "0123456789abcdef"; | |
1445 | int i, n; | |
1446 | ||
1447 | if (*s++ == '=') { | |
1448 | /* | |
1449 | * Try matching against the supplied keywords, | |
1450 | * and return -(index+1) if we match one | |
1451 | */ | |
1452 | if (keywords != NULL) { | |
1453 | for (i = 0; *keywords != NULL; ++i) { | |
1454 | if (!strcmp(s, *keywords++)) | |
1455 | return -(i+1); | |
1456 | } | |
1457 | } | |
1458 | /* | |
1459 | * Look for a series of no more than "max_vals" | |
1460 | * numeric values separated by commas, in base10, | |
1461 | * or base16 when prefixed with "0x". | |
1462 | * Return a count of how many were found. | |
1463 | */ | |
1464 | for (n = 0; (i = stridx(decimal, *s)) >= 0;) { | |
1465 | vals[n] = i; | |
1466 | while ((i = stridx(decimal, *++s)) >= 0) | |
1467 | vals[n] = (vals[n] * 10) + i; | |
1468 | if (*s == 'x' && !vals[n]) { | |
1469 | while ((i = stridx(hex, *++s)) >= 0) | |
1470 | vals[n] = (vals[n] * 0x10) + i; | |
1471 | } | |
1472 | if (++n == max_vals) | |
1473 | break; | |
1474 | if (*s == ',' || *s == ';') | |
1475 | ++s; | |
1476 | } | |
1477 | if (!*s) | |
1478 | return n; | |
1479 | } | |
1480 | return 0; /* zero = nothing matched */ | |
1481 | } | |
1482 | ||
1483 | #ifdef CONFIG_BLK_DEV_ALI14XX | |
1484 | static int __initdata probe_ali14xx; | |
1485 | extern int ali14xx_init(void); | |
1486 | #endif | |
1487 | #ifdef CONFIG_BLK_DEV_UMC8672 | |
1488 | static int __initdata probe_umc8672; | |
1489 | extern int umc8672_init(void); | |
1490 | #endif | |
1491 | #ifdef CONFIG_BLK_DEV_DTC2278 | |
1492 | static int __initdata probe_dtc2278; | |
1493 | extern int dtc2278_init(void); | |
1494 | #endif | |
1495 | #ifdef CONFIG_BLK_DEV_HT6560B | |
1496 | static int __initdata probe_ht6560b; | |
1497 | extern int ht6560b_init(void); | |
1498 | #endif | |
1499 | #ifdef CONFIG_BLK_DEV_QD65XX | |
1500 | static int __initdata probe_qd65xx; | |
1501 | extern int qd65xx_init(void); | |
1502 | #endif | |
1503 | ||
1504 | static int __initdata is_chipset_set[MAX_HWIFS]; | |
1505 | ||
1506 | /* | |
1507 | * ide_setup() gets called VERY EARLY during initialization, | |
1508 | * to handle kernel "command line" strings beginning with "hdx=" or "ide". | |
1509 | * | |
1510 | * Remember to update Documentation/ide.txt if you change something here. | |
1511 | */ | |
1512 | static int __init ide_setup(char *s) | |
1513 | { | |
1514 | int i, vals[3]; | |
1515 | ide_hwif_t *hwif; | |
1516 | ide_drive_t *drive; | |
1517 | unsigned int hw, unit; | |
1518 | const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); | |
1519 | const char max_hwif = '0' + (MAX_HWIFS - 1); | |
1520 | ||
1521 | ||
1522 | if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ | |
1523 | return 0; /* driver and not us */ | |
1524 | ||
1525 | if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) | |
1526 | return 0; | |
1527 | ||
1528 | printk(KERN_INFO "ide_setup: %s", s); | |
1529 | init_ide_data (); | |
1530 | ||
1531 | #ifdef CONFIG_BLK_DEV_IDEDOUBLER | |
1532 | if (!strcmp(s, "ide=doubler")) { | |
1533 | extern int ide_doubler; | |
1534 | ||
1535 | printk(" : Enabled support for IDE doublers\n"); | |
1536 | ide_doubler = 1; | |
1537 | return 1; | |
1538 | } | |
1539 | #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ | |
1540 | ||
1541 | if (!strcmp(s, "ide=nodma")) { | |
1542 | printk(" : Prevented DMA\n"); | |
1543 | noautodma = 1; | |
1544 | return 1; | |
1545 | } | |
1546 | ||
1547 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
1548 | if (!strcmp(s, "ide=reverse")) { | |
1549 | ide_scan_direction = 1; | |
1550 | printk(" : Enabled support for IDE inverse scan order.\n"); | |
1551 | return 1; | |
1552 | } | |
1553 | #endif /* CONFIG_BLK_DEV_IDEPCI */ | |
1554 | ||
1555 | /* | |
1556 | * Look for drive options: "hdx=" | |
1557 | */ | |
1558 | if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { | |
1559 | const char *hd_words[] = { | |
1560 | "none", "noprobe", "nowerr", "cdrom", "serialize", | |
1561 | "autotune", "noautotune", "minus8", "swapdata", "bswap", | |
1562 | "minus11", "remap", "remap63", "scsi", NULL }; | |
1563 | unit = s[2] - 'a'; | |
1564 | hw = unit / MAX_DRIVES; | |
1565 | unit = unit % MAX_DRIVES; | |
1566 | hwif = &ide_hwifs[hw]; | |
1567 | drive = &hwif->drives[unit]; | |
1568 | if (strncmp(s + 4, "ide-", 4) == 0) { | |
1569 | strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); | |
1570 | goto done; | |
1571 | } | |
1572 | switch (match_parm(&s[3], hd_words, vals, 3)) { | |
1573 | case -1: /* "none" */ | |
1574 | case -2: /* "noprobe" */ | |
1575 | drive->noprobe = 1; | |
1576 | goto done; | |
1577 | case -3: /* "nowerr" */ | |
1578 | drive->bad_wstat = BAD_R_STAT; | |
1579 | hwif->noprobe = 0; | |
1580 | goto done; | |
1581 | case -4: /* "cdrom" */ | |
1582 | drive->present = 1; | |
1583 | drive->media = ide_cdrom; | |
1584 | /* an ATAPI device ignores DRDY */ | |
1585 | drive->ready_stat = 0; | |
1586 | hwif->noprobe = 0; | |
1587 | goto done; | |
1588 | case -5: /* "serialize" */ | |
1589 | printk(" -- USE \"ide%d=serialize\" INSTEAD", hw); | |
1590 | goto do_serialize; | |
1591 | case -6: /* "autotune" */ | |
1592 | drive->autotune = IDE_TUNE_AUTO; | |
1593 | goto obsolete_option; | |
1594 | case -7: /* "noautotune" */ | |
1595 | drive->autotune = IDE_TUNE_NOAUTO; | |
1596 | goto obsolete_option; | |
1597 | case -9: /* "swapdata" */ | |
1598 | case -10: /* "bswap" */ | |
1599 | drive->bswap = 1; | |
1600 | goto done; | |
1601 | case -12: /* "remap" */ | |
1602 | drive->remap_0_to_1 = 1; | |
1603 | goto done; | |
1604 | case -13: /* "remap63" */ | |
1605 | drive->sect0 = 63; | |
1606 | goto done; | |
1607 | case -14: /* "scsi" */ | |
1608 | drive->scsi = 1; | |
1609 | goto done; | |
1610 | case 3: /* cyl,head,sect */ | |
1611 | drive->media = ide_disk; | |
1612 | drive->ready_stat = READY_STAT; | |
1613 | drive->cyl = drive->bios_cyl = vals[0]; | |
1614 | drive->head = drive->bios_head = vals[1]; | |
1615 | drive->sect = drive->bios_sect = vals[2]; | |
1616 | drive->present = 1; | |
1617 | drive->forced_geom = 1; | |
1618 | hwif->noprobe = 0; | |
1619 | goto done; | |
1620 | default: | |
1621 | goto bad_option; | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') | |
1626 | goto bad_option; | |
1627 | /* | |
1628 | * Look for bus speed option: "idebus=" | |
1629 | */ | |
1630 | if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { | |
1631 | if (match_parm(&s[6], NULL, vals, 1) != 1) | |
1632 | goto bad_option; | |
1633 | if (vals[0] >= 20 && vals[0] <= 66) { | |
1634 | idebus_parameter = vals[0]; | |
1635 | } else | |
1636 | printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); | |
1637 | goto done; | |
1638 | } | |
1639 | /* | |
1640 | * Look for interface options: "idex=" | |
1641 | */ | |
1642 | if (s[3] >= '0' && s[3] <= max_hwif) { | |
1643 | /* | |
1644 | * Be VERY CAREFUL changing this: note hardcoded indexes below | |
1645 | * (-8, -9, -10) are reserved to ease the hardcoding. | |
1646 | */ | |
1647 | static const char *ide_words[] = { | |
1648 | "noprobe", "serialize", "autotune", "noautotune", | |
1649 | "reset", "dma", "ata66", "minus8", "minus9", | |
1650 | "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", | |
1651 | "dtc2278", "umc8672", "ali14xx", NULL }; | |
1652 | hw = s[3] - '0'; | |
1653 | hwif = &ide_hwifs[hw]; | |
1654 | i = match_parm(&s[4], ide_words, vals, 3); | |
1655 | ||
1656 | /* | |
1657 | * Cryptic check to ensure chipset not already set for hwif. | |
1658 | * Note: we can't depend on hwif->chipset here. | |
1659 | */ | |
1660 | if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { | |
1661 | /* chipset already specified */ | |
1662 | if (is_chipset_set[hw]) | |
1663 | goto bad_option; | |
1664 | if (i > -18 && i <= -11) { | |
1665 | /* these drivers are for "ide0=" only */ | |
1666 | if (hw != 0) | |
1667 | goto bad_hwif; | |
1668 | /* chipset already specified for 2nd port */ | |
1669 | if (is_chipset_set[hw+1]) | |
1670 | goto bad_option; | |
1671 | } | |
1672 | is_chipset_set[hw] = 1; | |
1673 | printk("\n"); | |
1674 | } | |
1675 | ||
1676 | switch (i) { | |
1677 | #ifdef CONFIG_BLK_DEV_ALI14XX | |
1678 | case -17: /* "ali14xx" */ | |
1679 | probe_ali14xx = 1; | |
1680 | goto done; | |
1681 | #endif | |
1682 | #ifdef CONFIG_BLK_DEV_UMC8672 | |
1683 | case -16: /* "umc8672" */ | |
1684 | probe_umc8672 = 1; | |
1685 | goto done; | |
1686 | #endif | |
1687 | #ifdef CONFIG_BLK_DEV_DTC2278 | |
1688 | case -15: /* "dtc2278" */ | |
1689 | probe_dtc2278 = 1; | |
1690 | goto done; | |
1691 | #endif | |
1692 | #ifdef CONFIG_BLK_DEV_CMD640 | |
1693 | case -14: /* "cmd640_vlb" */ | |
1694 | { | |
1695 | extern int cmd640_vlb; /* flag for cmd640.c */ | |
1696 | cmd640_vlb = 1; | |
1697 | goto done; | |
1698 | } | |
1699 | #endif | |
1700 | #ifdef CONFIG_BLK_DEV_HT6560B | |
1701 | case -13: /* "ht6560b" */ | |
1702 | probe_ht6560b = 1; | |
1703 | goto done; | |
1704 | #endif | |
1705 | #ifdef CONFIG_BLK_DEV_QD65XX | |
1706 | case -12: /* "qd65xx" */ | |
1707 | probe_qd65xx = 1; | |
1708 | goto done; | |
1709 | #endif | |
1710 | #ifdef CONFIG_BLK_DEV_4DRIVES | |
1711 | case -11: /* "four" drives on one set of ports */ | |
1712 | { | |
1713 | ide_hwif_t *mate = &ide_hwifs[hw^1]; | |
1714 | mate->drives[0].select.all ^= 0x20; | |
1715 | mate->drives[1].select.all ^= 0x20; | |
1716 | hwif->chipset = mate->chipset = ide_4drives; | |
1717 | mate->irq = hwif->irq; | |
1718 | memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); | |
1719 | goto do_serialize; | |
1720 | } | |
1721 | #endif /* CONFIG_BLK_DEV_4DRIVES */ | |
1722 | case -10: /* minus10 */ | |
1723 | case -9: /* minus9 */ | |
1724 | case -8: /* minus8 */ | |
1725 | goto bad_option; | |
1726 | case -7: /* ata66 */ | |
1727 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
1728 | hwif->udma_four = 1; | |
1729 | goto obsolete_option; | |
1730 | #else | |
1731 | goto bad_hwif; | |
1732 | #endif | |
1733 | case -6: /* dma */ | |
1734 | hwif->autodma = 1; | |
1735 | goto obsolete_option; | |
1736 | case -5: /* "reset" */ | |
1737 | hwif->reset = 1; | |
1738 | goto obsolete_option; | |
1739 | case -4: /* "noautotune" */ | |
1740 | hwif->drives[0].autotune = IDE_TUNE_NOAUTO; | |
1741 | hwif->drives[1].autotune = IDE_TUNE_NOAUTO; | |
1742 | goto obsolete_option; | |
1743 | case -3: /* "autotune" */ | |
1744 | hwif->drives[0].autotune = IDE_TUNE_AUTO; | |
1745 | hwif->drives[1].autotune = IDE_TUNE_AUTO; | |
1746 | goto obsolete_option; | |
1747 | case -2: /* "serialize" */ | |
1748 | do_serialize: | |
1749 | hwif->mate = &ide_hwifs[hw^1]; | |
1750 | hwif->mate->mate = hwif; | |
1751 | hwif->serialized = hwif->mate->serialized = 1; | |
1752 | goto obsolete_option; | |
1753 | ||
1754 | case -1: /* "noprobe" */ | |
1755 | hwif->noprobe = 1; | |
1756 | goto done; | |
1757 | ||
1758 | case 1: /* base */ | |
1759 | vals[1] = vals[0] + 0x206; /* default ctl */ | |
1760 | case 2: /* base,ctl */ | |
1761 | vals[2] = 0; /* default irq = probe for it */ | |
1762 | case 3: /* base,ctl,irq */ | |
1763 | hwif->hw.irq = vals[2]; | |
1764 | ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq); | |
1765 | memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports)); | |
1766 | hwif->irq = vals[2]; | |
1767 | hwif->noprobe = 0; | |
1768 | hwif->chipset = ide_forced; | |
1769 | goto obsolete_option; | |
1770 | ||
1771 | case 0: goto bad_option; | |
1772 | default: | |
1773 | printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); | |
1774 | return 1; | |
1775 | } | |
1776 | } | |
1777 | bad_option: | |
1778 | printk(" -- BAD OPTION\n"); | |
1779 | return 1; | |
1780 | obsolete_option: | |
1781 | printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); | |
1782 | return 1; | |
1783 | bad_hwif: | |
1784 | printk("-- NOT SUPPORTED ON ide%d", hw); | |
1785 | done: | |
1786 | printk("\n"); | |
1787 | return 1; | |
1788 | } | |
1789 | ||
1790 | extern void pnpide_init(void); | |
1791 | extern void h8300_ide_init(void); | |
1792 | ||
1793 | /* | |
1794 | * probe_for_hwifs() finds/initializes "known" IDE interfaces | |
1795 | */ | |
1796 | static void __init probe_for_hwifs (void) | |
1797 | { | |
1798 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
1799 | ide_scan_pcibus(ide_scan_direction); | |
1800 | #endif /* CONFIG_BLK_DEV_IDEPCI */ | |
1801 | ||
1802 | #ifdef CONFIG_ETRAX_IDE | |
1803 | { | |
1804 | extern void init_e100_ide(void); | |
1805 | init_e100_ide(); | |
1806 | } | |
1807 | #endif /* CONFIG_ETRAX_IDE */ | |
1808 | #ifdef CONFIG_BLK_DEV_CMD640 | |
1809 | { | |
1810 | extern void ide_probe_for_cmd640x(void); | |
1811 | ide_probe_for_cmd640x(); | |
1812 | } | |
1813 | #endif /* CONFIG_BLK_DEV_CMD640 */ | |
1814 | #ifdef CONFIG_BLK_DEV_IDE_PMAC | |
1815 | { | |
1816 | extern void pmac_ide_probe(void); | |
1817 | pmac_ide_probe(); | |
1818 | } | |
1819 | #endif /* CONFIG_BLK_DEV_IDE_PMAC */ | |
1820 | #ifdef CONFIG_BLK_DEV_GAYLE | |
1821 | { | |
1822 | extern void gayle_init(void); | |
1823 | gayle_init(); | |
1824 | } | |
1825 | #endif /* CONFIG_BLK_DEV_GAYLE */ | |
1826 | #ifdef CONFIG_BLK_DEV_FALCON_IDE | |
1827 | { | |
1828 | extern void falconide_init(void); | |
1829 | falconide_init(); | |
1830 | } | |
1831 | #endif /* CONFIG_BLK_DEV_FALCON_IDE */ | |
1832 | #ifdef CONFIG_BLK_DEV_MAC_IDE | |
1833 | { | |
1834 | extern void macide_init(void); | |
1835 | macide_init(); | |
1836 | } | |
1837 | #endif /* CONFIG_BLK_DEV_MAC_IDE */ | |
1838 | #ifdef CONFIG_BLK_DEV_Q40IDE | |
1839 | { | |
1840 | extern void q40ide_init(void); | |
1841 | q40ide_init(); | |
1842 | } | |
1843 | #endif /* CONFIG_BLK_DEV_Q40IDE */ | |
1844 | #ifdef CONFIG_BLK_DEV_BUDDHA | |
1845 | { | |
1846 | extern void buddha_init(void); | |
1847 | buddha_init(); | |
1848 | } | |
1849 | #endif /* CONFIG_BLK_DEV_BUDDHA */ | |
1850 | #ifdef CONFIG_BLK_DEV_IDEPNP | |
1851 | pnpide_init(); | |
1852 | #endif | |
1853 | #ifdef CONFIG_H8300 | |
1854 | h8300_ide_init(); | |
1855 | #endif | |
1856 | } | |
1857 | ||
8604affd | 1858 | void ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver) |
1da177e4 | 1859 | { |
1da177e4 | 1860 | #ifdef CONFIG_PROC_FS |
8604affd | 1861 | ide_add_proc_entries(drive->proc, driver->proc, drive); |
1da177e4 | 1862 | #endif |
1da177e4 LT |
1863 | } |
1864 | ||
1865 | EXPORT_SYMBOL(ide_register_subdriver); | |
1866 | ||
1867 | /** | |
1868 | * ide_unregister_subdriver - disconnect drive from driver | |
1869 | * @drive: drive to unplug | |
8604affd | 1870 | * @driver: driver |
1da177e4 LT |
1871 | * |
1872 | * Disconnect a drive from the driver it was attached to and then | |
1873 | * clean up the various proc files and other objects attached to it. | |
1874 | * | |
8604affd | 1875 | * Takes ide_setting_sem and ide_lock. |
1da177e4 | 1876 | * Caller must hold none of the locks. |
1da177e4 LT |
1877 | */ |
1878 | ||
8604affd | 1879 | void ide_unregister_subdriver(ide_drive_t *drive, ide_driver_t *driver) |
1da177e4 LT |
1880 | { |
1881 | unsigned long flags; | |
1882 | ||
1883 | down(&ide_setting_sem); | |
1884 | spin_lock_irqsave(&ide_lock, flags); | |
1da177e4 | 1885 | #ifdef CONFIG_PROC_FS |
8604affd | 1886 | ide_remove_proc_entries(drive->proc, driver->proc); |
1da177e4 LT |
1887 | #endif |
1888 | auto_remove_settings(drive); | |
1da177e4 LT |
1889 | spin_unlock_irqrestore(&ide_lock, flags); |
1890 | up(&ide_setting_sem); | |
1da177e4 LT |
1891 | } |
1892 | ||
1893 | EXPORT_SYMBOL(ide_unregister_subdriver); | |
1894 | ||
1da177e4 LT |
1895 | /* |
1896 | * Probe module | |
1897 | */ | |
1898 | ||
1899 | EXPORT_SYMBOL(ide_lock); | |
1900 | ||
8604affd BZ |
1901 | static int ide_bus_match(struct device *dev, struct device_driver *drv) |
1902 | { | |
1903 | return 1; | |
1904 | } | |
1905 | ||
1da177e4 LT |
1906 | struct bus_type ide_bus_type = { |
1907 | .name = "ide", | |
8604affd | 1908 | .match = ide_bus_match, |
1da177e4 LT |
1909 | .suspend = generic_ide_suspend, |
1910 | .resume = generic_ide_resume, | |
1911 | }; | |
1912 | ||
8604affd BZ |
1913 | EXPORT_SYMBOL_GPL(ide_bus_type); |
1914 | ||
1da177e4 LT |
1915 | /* |
1916 | * This is gets invoked once during initialization, to set *everything* up | |
1917 | */ | |
1918 | static int __init ide_init(void) | |
1919 | { | |
1920 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); | |
1921 | devfs_mk_dir("ide"); | |
1922 | system_bus_speed = ide_system_bus_speed(); | |
1923 | ||
1924 | bus_register(&ide_bus_type); | |
1925 | ||
1926 | init_ide_data(); | |
1927 | ||
1928 | #ifdef CONFIG_PROC_FS | |
1929 | proc_ide_root = proc_mkdir("ide", NULL); | |
1930 | #endif | |
1931 | ||
1932 | #ifdef CONFIG_BLK_DEV_ALI14XX | |
1933 | if (probe_ali14xx) | |
1934 | (void)ali14xx_init(); | |
1935 | #endif | |
1936 | #ifdef CONFIG_BLK_DEV_UMC8672 | |
1937 | if (probe_umc8672) | |
1938 | (void)umc8672_init(); | |
1939 | #endif | |
1940 | #ifdef CONFIG_BLK_DEV_DTC2278 | |
1941 | if (probe_dtc2278) | |
1942 | (void)dtc2278_init(); | |
1943 | #endif | |
1944 | #ifdef CONFIG_BLK_DEV_HT6560B | |
1945 | if (probe_ht6560b) | |
1946 | (void)ht6560b_init(); | |
1947 | #endif | |
1948 | #ifdef CONFIG_BLK_DEV_QD65XX | |
1949 | if (probe_qd65xx) | |
1950 | (void)qd65xx_init(); | |
1951 | #endif | |
1952 | ||
1953 | initializing = 1; | |
1954 | /* Probe for special PCI and other "known" interface chipsets. */ | |
1955 | probe_for_hwifs(); | |
1956 | initializing = 0; | |
1957 | ||
1958 | #ifdef CONFIG_PROC_FS | |
1959 | proc_ide_create(); | |
1960 | #endif | |
1961 | return 0; | |
1962 | } | |
1963 | ||
1964 | #ifdef MODULE | |
1965 | static char *options = NULL; | |
1966 | module_param(options, charp, 0); | |
1967 | MODULE_LICENSE("GPL"); | |
1968 | ||
1969 | static void __init parse_options (char *line) | |
1970 | { | |
1971 | char *next = line; | |
1972 | ||
1973 | if (line == NULL || !*line) | |
1974 | return; | |
1975 | while ((line = next) != NULL) { | |
1976 | if ((next = strchr(line,' ')) != NULL) | |
1977 | *next++ = 0; | |
1978 | if (!ide_setup(line)) | |
1979 | printk (KERN_INFO "Unknown option '%s'\n", line); | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | int init_module (void) | |
1984 | { | |
1985 | parse_options(options); | |
1986 | return ide_init(); | |
1987 | } | |
1988 | ||
1989 | void cleanup_module (void) | |
1990 | { | |
1991 | int index; | |
1992 | ||
1993 | for (index = 0; index < MAX_HWIFS; ++index) | |
1994 | ide_unregister(index); | |
1995 | ||
1996 | #ifdef CONFIG_PROC_FS | |
1997 | proc_ide_destroy(); | |
1998 | #endif | |
1999 | devfs_remove("ide"); | |
2000 | ||
2001 | bus_unregister(&ide_bus_type); | |
2002 | } | |
2003 | ||
2004 | #else /* !MODULE */ | |
2005 | ||
2006 | __setup("", ide_setup); | |
2007 | ||
2008 | module_init(ide_init); | |
2009 | ||
2010 | #endif /* MODULE */ |