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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 | ||
199 | static struct list_head ide_drives = LIST_HEAD_INIT(ide_drives); | |
200 | ||
201 | /* | |
202 | * Do not even *think* about calling this! | |
203 | */ | |
204 | static void init_hwif_data(ide_hwif_t *hwif, unsigned int index) | |
205 | { | |
206 | unsigned int unit; | |
207 | ||
208 | /* bulk initialize hwif & drive info with zeros */ | |
209 | memset(hwif, 0, sizeof(ide_hwif_t)); | |
210 | ||
211 | /* fill in any non-zero initial values */ | |
212 | hwif->index = index; | |
213 | hwif->major = ide_hwif_to_major[index]; | |
214 | ||
215 | hwif->name[0] = 'i'; | |
216 | hwif->name[1] = 'd'; | |
217 | hwif->name[2] = 'e'; | |
218 | hwif->name[3] = '0' + index; | |
219 | ||
220 | hwif->bus_state = BUSSTATE_ON; | |
221 | ||
222 | hwif->atapi_dma = 0; /* disable all atapi dma */ | |
223 | hwif->ultra_mask = 0x80; /* disable all ultra */ | |
224 | hwif->mwdma_mask = 0x80; /* disable all mwdma */ | |
225 | hwif->swdma_mask = 0x80; /* disable all swdma */ | |
226 | ||
227 | sema_init(&hwif->gendev_rel_sem, 0); | |
228 | ||
229 | default_hwif_iops(hwif); | |
230 | default_hwif_transport(hwif); | |
231 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
232 | ide_drive_t *drive = &hwif->drives[unit]; | |
233 | ||
234 | drive->media = ide_disk; | |
235 | drive->select.all = (unit<<4)|0xa0; | |
236 | drive->hwif = hwif; | |
237 | drive->ctl = 0x08; | |
238 | drive->ready_stat = READY_STAT; | |
239 | drive->bad_wstat = BAD_W_STAT; | |
240 | drive->special.b.recalibrate = 1; | |
241 | drive->special.b.set_geometry = 1; | |
242 | drive->name[0] = 'h'; | |
243 | drive->name[1] = 'd'; | |
244 | drive->name[2] = 'a' + (index * MAX_DRIVES) + unit; | |
245 | drive->max_failures = IDE_DEFAULT_MAX_FAILURES; | |
246 | drive->using_dma = 0; | |
247 | drive->is_flash = 0; | |
248 | drive->vdma = 0; | |
249 | INIT_LIST_HEAD(&drive->list); | |
250 | sema_init(&drive->gendev_rel_sem, 0); | |
251 | } | |
252 | } | |
253 | ||
254 | static void init_hwif_default(ide_hwif_t *hwif, unsigned int index) | |
255 | { | |
256 | hw_regs_t hw; | |
257 | ||
258 | memset(&hw, 0, sizeof(hw_regs_t)); | |
259 | ||
260 | ide_init_hwif_ports(&hw, ide_default_io_base(index), 0, &hwif->irq); | |
261 | ||
262 | memcpy(&hwif->hw, &hw, sizeof(hw)); | |
263 | memcpy(hwif->io_ports, hw.io_ports, sizeof(hw.io_ports)); | |
264 | ||
265 | hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; | |
266 | #ifdef CONFIG_BLK_DEV_HD | |
267 | if (hwif->io_ports[IDE_DATA_OFFSET] == HD_DATA) | |
268 | hwif->noprobe = 1; /* may be overridden by ide_setup() */ | |
269 | #endif | |
270 | } | |
271 | ||
272 | extern void ide_arm_init(void); | |
273 | ||
274 | /* | |
275 | * init_ide_data() sets reasonable default values into all fields | |
276 | * of all instances of the hwifs and drives, but only on the first call. | |
277 | * Subsequent calls have no effect (they don't wipe out anything). | |
278 | * | |
279 | * This routine is normally called at driver initialization time, | |
280 | * but may also be called MUCH earlier during kernel "command-line" | |
281 | * parameter processing. As such, we cannot depend on any other parts | |
282 | * of the kernel (such as memory allocation) to be functioning yet. | |
283 | * | |
284 | * This is too bad, as otherwise we could dynamically allocate the | |
285 | * ide_drive_t structs as needed, rather than always consuming memory | |
286 | * for the max possible number (MAX_HWIFS * MAX_DRIVES) of them. | |
287 | * | |
288 | * FIXME: We should stuff the setup data into __init and copy the | |
289 | * relevant hwifs/allocate them properly during boot. | |
290 | */ | |
291 | #define MAGIC_COOKIE 0x12345678 | |
292 | static void __init init_ide_data (void) | |
293 | { | |
294 | ide_hwif_t *hwif; | |
295 | unsigned int index; | |
296 | static unsigned long magic_cookie = MAGIC_COOKIE; | |
297 | ||
298 | if (magic_cookie != MAGIC_COOKIE) | |
299 | return; /* already initialized */ | |
300 | magic_cookie = 0; | |
301 | ||
302 | /* Initialise all interface structures */ | |
303 | for (index = 0; index < MAX_HWIFS; ++index) { | |
304 | hwif = &ide_hwifs[index]; | |
305 | init_hwif_data(hwif, index); | |
306 | init_hwif_default(hwif, index); | |
307 | #if !defined(CONFIG_PPC32) || !defined(CONFIG_PCI) | |
308 | hwif->irq = hwif->hw.irq = | |
309 | ide_init_default_irq(hwif->io_ports[IDE_DATA_OFFSET]); | |
310 | #endif | |
311 | } | |
312 | #ifdef CONFIG_IDE_ARM | |
313 | initializing = 1; | |
314 | ide_arm_init(); | |
315 | initializing = 0; | |
316 | #endif | |
317 | } | |
318 | ||
319 | /** | |
320 | * ide_system_bus_speed - guess bus speed | |
321 | * | |
322 | * ide_system_bus_speed() returns what we think is the system VESA/PCI | |
323 | * bus speed (in MHz). This is used for calculating interface PIO timings. | |
324 | * The default is 40 for known PCI systems, 50 otherwise. | |
325 | * The "idebus=xx" parameter can be used to override this value. | |
326 | * The actual value to be used is computed/displayed the first time | |
327 | * through. Drivers should only use this as a last resort. | |
328 | * | |
329 | * Returns a guessed speed in MHz. | |
330 | */ | |
331 | ||
332 | static int ide_system_bus_speed(void) | |
333 | { | |
334 | #ifdef CONFIG_PCI | |
335 | static struct pci_device_id pci_default[] = { | |
336 | { PCI_DEVICE(PCI_ANY_ID, PCI_ANY_ID) }, | |
337 | { } | |
338 | }; | |
339 | #else | |
340 | #define pci_default 0 | |
341 | #endif /* CONFIG_PCI */ | |
342 | ||
343 | if (!system_bus_speed) { | |
344 | if (idebus_parameter) { | |
345 | /* user supplied value */ | |
346 | system_bus_speed = idebus_parameter; | |
347 | } else if (pci_dev_present(pci_default)) { | |
348 | /* safe default value for PCI */ | |
349 | system_bus_speed = 33; | |
350 | } else { | |
351 | /* safe default value for VESA and PCI */ | |
352 | system_bus_speed = 50; | |
353 | } | |
354 | printk(KERN_INFO "ide: Assuming %dMHz system bus speed " | |
355 | "for PIO modes%s\n", system_bus_speed, | |
356 | idebus_parameter ? "" : "; override with idebus=xx"); | |
357 | } | |
358 | return system_bus_speed; | |
359 | } | |
360 | ||
361 | /* | |
362 | * drives_lock protects the list of drives, drivers_lock the | |
363 | * list of drivers. Currently nobody takes both at once. | |
364 | */ | |
365 | ||
366 | static DEFINE_SPINLOCK(drives_lock); | |
367 | static DEFINE_SPINLOCK(drivers_lock); | |
368 | static LIST_HEAD(drivers); | |
369 | ||
370 | /* Iterator for the driver list. */ | |
371 | ||
372 | static void *m_start(struct seq_file *m, loff_t *pos) | |
373 | { | |
374 | struct list_head *p; | |
375 | loff_t l = *pos; | |
376 | spin_lock(&drivers_lock); | |
377 | list_for_each(p, &drivers) | |
378 | if (!l--) | |
379 | return list_entry(p, ide_driver_t, drivers); | |
380 | return NULL; | |
381 | } | |
382 | ||
383 | static void *m_next(struct seq_file *m, void *v, loff_t *pos) | |
384 | { | |
385 | struct list_head *p = ((ide_driver_t *)v)->drivers.next; | |
386 | (*pos)++; | |
387 | return p==&drivers ? NULL : list_entry(p, ide_driver_t, drivers); | |
388 | } | |
389 | ||
390 | static void m_stop(struct seq_file *m, void *v) | |
391 | { | |
392 | spin_unlock(&drivers_lock); | |
393 | } | |
394 | ||
395 | static int show_driver(struct seq_file *m, void *v) | |
396 | { | |
397 | ide_driver_t *driver = v; | |
398 | seq_printf(m, "%s version %s\n", driver->name, driver->version); | |
399 | return 0; | |
400 | } | |
401 | ||
402 | struct seq_operations ide_drivers_op = { | |
403 | .start = m_start, | |
404 | .next = m_next, | |
405 | .stop = m_stop, | |
406 | .show = show_driver | |
407 | }; | |
408 | ||
409 | #ifdef CONFIG_PROC_FS | |
410 | struct proc_dir_entry *proc_ide_root; | |
411 | #endif | |
412 | ||
413 | static struct resource* hwif_request_region(ide_hwif_t *hwif, | |
414 | unsigned long addr, int num) | |
415 | { | |
416 | struct resource *res = request_region(addr, num, hwif->name); | |
417 | ||
418 | if (!res) | |
419 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", | |
420 | hwif->name, addr, addr+num-1); | |
421 | return res; | |
422 | } | |
423 | ||
424 | /** | |
425 | * ide_hwif_request_regions - request resources for IDE | |
426 | * @hwif: interface to use | |
427 | * | |
428 | * Requests all the needed resources for an interface. | |
429 | * Right now core IDE code does this work which is deeply wrong. | |
430 | * MMIO leaves it to the controller driver, | |
431 | * PIO will migrate this way over time. | |
432 | */ | |
433 | ||
434 | int ide_hwif_request_regions(ide_hwif_t *hwif) | |
435 | { | |
436 | unsigned long addr; | |
437 | unsigned int i; | |
438 | ||
439 | if (hwif->mmio == 2) | |
440 | return 0; | |
441 | BUG_ON(hwif->mmio == 1); | |
442 | addr = hwif->io_ports[IDE_CONTROL_OFFSET]; | |
443 | if (addr && !hwif_request_region(hwif, addr, 1)) | |
444 | goto control_region_busy; | |
445 | hwif->straight8 = 0; | |
446 | addr = hwif->io_ports[IDE_DATA_OFFSET]; | |
447 | if ((addr | 7) == hwif->io_ports[IDE_STATUS_OFFSET]) { | |
448 | if (!hwif_request_region(hwif, addr, 8)) | |
449 | goto data_region_busy; | |
450 | hwif->straight8 = 1; | |
451 | return 0; | |
452 | } | |
453 | for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) { | |
454 | addr = hwif->io_ports[i]; | |
455 | if (!hwif_request_region(hwif, addr, 1)) { | |
456 | while (--i) | |
457 | release_region(addr, 1); | |
458 | goto data_region_busy; | |
459 | } | |
460 | } | |
461 | return 0; | |
462 | ||
463 | data_region_busy: | |
464 | addr = hwif->io_ports[IDE_CONTROL_OFFSET]; | |
465 | if (addr) | |
466 | release_region(addr, 1); | |
467 | control_region_busy: | |
468 | /* If any errors are return, we drop the hwif interface. */ | |
469 | return -EBUSY; | |
470 | } | |
471 | ||
472 | /** | |
473 | * ide_hwif_release_regions - free IDE resources | |
474 | * | |
475 | * Note that we only release the standard ports, | |
476 | * and do not even try to handle any extra ports | |
477 | * allocated for weird IDE interface chipsets. | |
478 | * | |
479 | * Note also that we don't yet handle mmio resources here. More | |
480 | * importantly our caller should be doing this so we need to | |
481 | * restructure this as a helper function for drivers. | |
482 | */ | |
483 | ||
484 | void ide_hwif_release_regions(ide_hwif_t *hwif) | |
485 | { | |
486 | u32 i = 0; | |
487 | ||
488 | if (hwif->mmio == 2) | |
489 | return; | |
490 | if (hwif->io_ports[IDE_CONTROL_OFFSET]) | |
491 | release_region(hwif->io_ports[IDE_CONTROL_OFFSET], 1); | |
492 | if (hwif->straight8) { | |
493 | release_region(hwif->io_ports[IDE_DATA_OFFSET], 8); | |
494 | return; | |
495 | } | |
496 | for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) | |
497 | if (hwif->io_ports[i]) | |
498 | release_region(hwif->io_ports[i], 1); | |
499 | } | |
500 | ||
501 | /** | |
502 | * ide_hwif_restore - restore hwif to template | |
503 | * @hwif: hwif to update | |
504 | * @tmp_hwif: template | |
505 | * | |
506 | * Restore hwif to a previous state by copying most settngs | |
507 | * from the template. | |
508 | */ | |
509 | ||
510 | static void ide_hwif_restore(ide_hwif_t *hwif, ide_hwif_t *tmp_hwif) | |
511 | { | |
512 | hwif->hwgroup = tmp_hwif->hwgroup; | |
513 | ||
514 | hwif->gendev.parent = tmp_hwif->gendev.parent; | |
515 | ||
516 | hwif->proc = tmp_hwif->proc; | |
517 | ||
518 | hwif->major = tmp_hwif->major; | |
519 | hwif->straight8 = tmp_hwif->straight8; | |
520 | hwif->bus_state = tmp_hwif->bus_state; | |
521 | ||
522 | hwif->atapi_dma = tmp_hwif->atapi_dma; | |
523 | hwif->ultra_mask = tmp_hwif->ultra_mask; | |
524 | hwif->mwdma_mask = tmp_hwif->mwdma_mask; | |
525 | hwif->swdma_mask = tmp_hwif->swdma_mask; | |
526 | ||
527 | hwif->chipset = tmp_hwif->chipset; | |
528 | hwif->hold = tmp_hwif->hold; | |
529 | ||
530 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
531 | hwif->pci_dev = tmp_hwif->pci_dev; | |
532 | hwif->cds = tmp_hwif->cds; | |
533 | #endif | |
534 | ||
535 | hwif->tuneproc = tmp_hwif->tuneproc; | |
536 | hwif->speedproc = tmp_hwif->speedproc; | |
537 | hwif->selectproc = tmp_hwif->selectproc; | |
538 | hwif->reset_poll = tmp_hwif->reset_poll; | |
539 | hwif->pre_reset = tmp_hwif->pre_reset; | |
540 | hwif->resetproc = tmp_hwif->resetproc; | |
541 | hwif->intrproc = tmp_hwif->intrproc; | |
542 | hwif->maskproc = tmp_hwif->maskproc; | |
543 | hwif->quirkproc = tmp_hwif->quirkproc; | |
544 | hwif->busproc = tmp_hwif->busproc; | |
545 | ||
546 | hwif->ata_input_data = tmp_hwif->ata_input_data; | |
547 | hwif->ata_output_data = tmp_hwif->ata_output_data; | |
548 | hwif->atapi_input_bytes = tmp_hwif->atapi_input_bytes; | |
549 | hwif->atapi_output_bytes = tmp_hwif->atapi_output_bytes; | |
550 | ||
551 | hwif->dma_setup = tmp_hwif->dma_setup; | |
552 | hwif->dma_exec_cmd = tmp_hwif->dma_exec_cmd; | |
553 | hwif->dma_start = tmp_hwif->dma_start; | |
554 | hwif->ide_dma_end = tmp_hwif->ide_dma_end; | |
555 | hwif->ide_dma_check = tmp_hwif->ide_dma_check; | |
556 | hwif->ide_dma_on = tmp_hwif->ide_dma_on; | |
557 | hwif->ide_dma_off_quietly = tmp_hwif->ide_dma_off_quietly; | |
558 | hwif->ide_dma_test_irq = tmp_hwif->ide_dma_test_irq; | |
559 | hwif->ide_dma_host_on = tmp_hwif->ide_dma_host_on; | |
560 | hwif->ide_dma_host_off = tmp_hwif->ide_dma_host_off; | |
561 | hwif->ide_dma_lostirq = tmp_hwif->ide_dma_lostirq; | |
562 | hwif->ide_dma_timeout = tmp_hwif->ide_dma_timeout; | |
563 | ||
564 | hwif->OUTB = tmp_hwif->OUTB; | |
565 | hwif->OUTBSYNC = tmp_hwif->OUTBSYNC; | |
566 | hwif->OUTW = tmp_hwif->OUTW; | |
567 | hwif->OUTL = tmp_hwif->OUTL; | |
568 | hwif->OUTSW = tmp_hwif->OUTSW; | |
569 | hwif->OUTSL = tmp_hwif->OUTSL; | |
570 | ||
571 | hwif->INB = tmp_hwif->INB; | |
572 | hwif->INW = tmp_hwif->INW; | |
573 | hwif->INL = tmp_hwif->INL; | |
574 | hwif->INSW = tmp_hwif->INSW; | |
575 | hwif->INSL = tmp_hwif->INSL; | |
576 | ||
577 | hwif->sg_max_nents = tmp_hwif->sg_max_nents; | |
578 | ||
579 | hwif->mmio = tmp_hwif->mmio; | |
580 | hwif->rqsize = tmp_hwif->rqsize; | |
581 | hwif->no_lba48 = tmp_hwif->no_lba48; | |
582 | ||
583 | #ifndef CONFIG_BLK_DEV_IDECS | |
584 | hwif->irq = tmp_hwif->irq; | |
585 | #endif | |
586 | ||
587 | hwif->dma_base = tmp_hwif->dma_base; | |
588 | hwif->dma_master = tmp_hwif->dma_master; | |
589 | hwif->dma_command = tmp_hwif->dma_command; | |
590 | hwif->dma_vendor1 = tmp_hwif->dma_vendor1; | |
591 | hwif->dma_status = tmp_hwif->dma_status; | |
592 | hwif->dma_vendor3 = tmp_hwif->dma_vendor3; | |
593 | hwif->dma_prdtable = tmp_hwif->dma_prdtable; | |
594 | ||
595 | hwif->dma_extra = tmp_hwif->dma_extra; | |
596 | hwif->config_data = tmp_hwif->config_data; | |
597 | hwif->select_data = tmp_hwif->select_data; | |
598 | hwif->autodma = tmp_hwif->autodma; | |
599 | hwif->udma_four = tmp_hwif->udma_four; | |
600 | hwif->no_dsc = tmp_hwif->no_dsc; | |
601 | ||
602 | hwif->hwif_data = tmp_hwif->hwif_data; | |
603 | } | |
604 | ||
605 | /** | |
606 | * ide_unregister - free an ide interface | |
607 | * @index: index of interface (will change soon to a pointer) | |
608 | * | |
609 | * Perform the final unregister of an IDE interface. At the moment | |
610 | * we don't refcount interfaces so this will also get split up. | |
611 | * | |
612 | * Locking: | |
613 | * The caller must not hold the IDE locks | |
614 | * The drive present/vanishing is not yet properly locked | |
615 | * Take care with the callbacks. These have been split to avoid | |
616 | * deadlocking the IDE layer. The shutdown callback is called | |
617 | * before we take the lock and free resources. It is up to the | |
618 | * caller to be sure there is no pending I/O here, and that | |
619 | * the interfce will not be reopened (present/vanishing locking | |
620 | * isnt yet done btw). After we commit to the final kill we | |
621 | * call the cleanup callback with the ide locks held. | |
622 | * | |
623 | * Unregister restores the hwif structures to the default state. | |
624 | * This is raving bonkers. | |
625 | */ | |
626 | ||
627 | void ide_unregister(unsigned int index) | |
628 | { | |
629 | ide_drive_t *drive; | |
630 | ide_hwif_t *hwif, *g; | |
631 | static ide_hwif_t tmp_hwif; /* protected by ide_cfg_sem */ | |
632 | ide_hwgroup_t *hwgroup; | |
633 | int irq_count = 0, unit, i; | |
634 | ||
635 | BUG_ON(index >= MAX_HWIFS); | |
636 | ||
637 | BUG_ON(in_interrupt()); | |
638 | BUG_ON(irqs_disabled()); | |
639 | down(&ide_cfg_sem); | |
640 | spin_lock_irq(&ide_lock); | |
641 | hwif = &ide_hwifs[index]; | |
642 | if (!hwif->present) | |
643 | goto abort; | |
644 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
645 | drive = &hwif->drives[unit]; | |
646 | if (!drive->present) | |
647 | continue; | |
648 | if (drive->usage || DRIVER(drive)->busy) | |
649 | goto abort; | |
650 | drive->dead = 1; | |
651 | } | |
652 | hwif->present = 0; | |
653 | ||
654 | spin_unlock_irq(&ide_lock); | |
655 | ||
656 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
657 | drive = &hwif->drives[unit]; | |
658 | if (!drive->present) | |
659 | continue; | |
660 | DRIVER(drive)->cleanup(drive); | |
661 | } | |
662 | ||
663 | destroy_proc_ide_interface(hwif); | |
664 | ||
665 | hwgroup = hwif->hwgroup; | |
666 | /* | |
667 | * free the irq if we were the only hwif using it | |
668 | */ | |
669 | g = hwgroup->hwif; | |
670 | do { | |
671 | if (g->irq == hwif->irq) | |
672 | ++irq_count; | |
673 | g = g->next; | |
674 | } while (g != hwgroup->hwif); | |
675 | if (irq_count == 1) | |
676 | free_irq(hwif->irq, hwgroup); | |
677 | ||
678 | spin_lock_irq(&ide_lock); | |
679 | /* | |
680 | * Note that we only release the standard ports, | |
681 | * and do not even try to handle any extra ports | |
682 | * allocated for weird IDE interface chipsets. | |
683 | */ | |
684 | ide_hwif_release_regions(hwif); | |
685 | ||
686 | /* | |
687 | * Remove us from the hwgroup, and free | |
688 | * the hwgroup if we were the only member | |
689 | */ | |
690 | for (i = 0; i < MAX_DRIVES; ++i) { | |
691 | drive = &hwif->drives[i]; | |
692 | if (drive->devfs_name[0] != '\0') { | |
693 | devfs_remove(drive->devfs_name); | |
694 | drive->devfs_name[0] = '\0'; | |
695 | } | |
696 | if (!drive->present) | |
697 | continue; | |
698 | if (drive == drive->next) { | |
699 | /* special case: last drive from hwgroup. */ | |
700 | BUG_ON(hwgroup->drive != drive); | |
701 | hwgroup->drive = NULL; | |
702 | } else { | |
703 | ide_drive_t *walk; | |
704 | ||
705 | walk = hwgroup->drive; | |
706 | while (walk->next != drive) | |
707 | walk = walk->next; | |
708 | walk->next = drive->next; | |
709 | if (hwgroup->drive == drive) { | |
710 | hwgroup->drive = drive->next; | |
711 | hwgroup->hwif = HWIF(hwgroup->drive); | |
712 | } | |
713 | } | |
714 | BUG_ON(hwgroup->drive == drive); | |
715 | if (drive->id != NULL) { | |
716 | kfree(drive->id); | |
717 | drive->id = NULL; | |
718 | } | |
719 | drive->present = 0; | |
720 | /* Messed up locking ... */ | |
721 | spin_unlock_irq(&ide_lock); | |
722 | blk_cleanup_queue(drive->queue); | |
723 | device_unregister(&drive->gendev); | |
724 | down(&drive->gendev_rel_sem); | |
725 | spin_lock_irq(&ide_lock); | |
726 | drive->queue = NULL; | |
727 | } | |
728 | if (hwif->next == hwif) { | |
729 | BUG_ON(hwgroup->hwif != hwif); | |
730 | kfree(hwgroup); | |
731 | } else { | |
732 | /* There is another interface in hwgroup. | |
733 | * Unlink us, and set hwgroup->drive and ->hwif to | |
734 | * something sane. | |
735 | */ | |
736 | g = hwgroup->hwif; | |
737 | while (g->next != hwif) | |
738 | g = g->next; | |
739 | g->next = hwif->next; | |
740 | if (hwgroup->hwif == hwif) { | |
741 | /* Chose a random hwif for hwgroup->hwif. | |
742 | * It's guaranteed that there are no drives | |
743 | * left in the hwgroup. | |
744 | */ | |
745 | BUG_ON(hwgroup->drive != NULL); | |
746 | hwgroup->hwif = g; | |
747 | } | |
748 | BUG_ON(hwgroup->hwif == hwif); | |
749 | } | |
750 | ||
751 | /* More messed up locking ... */ | |
752 | spin_unlock_irq(&ide_lock); | |
753 | device_unregister(&hwif->gendev); | |
754 | down(&hwif->gendev_rel_sem); | |
755 | ||
756 | /* | |
757 | * Remove us from the kernel's knowledge | |
758 | */ | |
759 | blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS); | |
760 | kfree(hwif->sg_table); | |
761 | unregister_blkdev(hwif->major, hwif->name); | |
762 | spin_lock_irq(&ide_lock); | |
763 | ||
764 | if (hwif->dma_base) { | |
765 | (void) ide_release_dma(hwif); | |
766 | ||
767 | hwif->dma_base = 0; | |
768 | hwif->dma_master = 0; | |
769 | hwif->dma_command = 0; | |
770 | hwif->dma_vendor1 = 0; | |
771 | hwif->dma_status = 0; | |
772 | hwif->dma_vendor3 = 0; | |
773 | hwif->dma_prdtable = 0; | |
774 | } | |
775 | ||
776 | /* copy original settings */ | |
777 | tmp_hwif = *hwif; | |
778 | ||
779 | /* restore hwif data to pristine status */ | |
780 | init_hwif_data(hwif, index); | |
781 | init_hwif_default(hwif, index); | |
782 | ||
783 | ide_hwif_restore(hwif, &tmp_hwif); | |
784 | ||
785 | abort: | |
786 | spin_unlock_irq(&ide_lock); | |
787 | up(&ide_cfg_sem); | |
788 | } | |
789 | ||
790 | EXPORT_SYMBOL(ide_unregister); | |
791 | ||
792 | ||
793 | /** | |
794 | * ide_setup_ports - set up IDE interface ports | |
795 | * @hw: register descriptions | |
796 | * @base: base register | |
797 | * @offsets: table of register offsets | |
798 | * @ctrl: control register | |
799 | * @ack_irq: IRQ ack | |
800 | * @irq: interrupt lie | |
801 | * | |
802 | * Setup hw_regs_t structure described by parameters. You | |
803 | * may set up the hw structure yourself OR use this routine to | |
804 | * do it for you. This is basically a helper | |
805 | * | |
806 | */ | |
807 | ||
808 | void ide_setup_ports ( hw_regs_t *hw, | |
809 | unsigned long base, int *offsets, | |
810 | unsigned long ctrl, unsigned long intr, | |
811 | ide_ack_intr_t *ack_intr, | |
812 | /* | |
813 | * ide_io_ops_t *iops, | |
814 | */ | |
815 | int irq) | |
816 | { | |
817 | int i; | |
818 | ||
819 | for (i = 0; i < IDE_NR_PORTS; i++) { | |
820 | if (offsets[i] == -1) { | |
821 | switch(i) { | |
822 | case IDE_CONTROL_OFFSET: | |
823 | hw->io_ports[i] = ctrl; | |
824 | break; | |
825 | #if defined(CONFIG_AMIGA) || defined(CONFIG_MAC) | |
826 | case IDE_IRQ_OFFSET: | |
827 | hw->io_ports[i] = intr; | |
828 | break; | |
829 | #endif /* (CONFIG_AMIGA) || (CONFIG_MAC) */ | |
830 | default: | |
831 | hw->io_ports[i] = 0; | |
832 | break; | |
833 | } | |
834 | } else { | |
835 | hw->io_ports[i] = base + offsets[i]; | |
836 | } | |
837 | } | |
838 | hw->irq = irq; | |
839 | hw->dma = NO_DMA; | |
840 | hw->ack_intr = ack_intr; | |
841 | /* | |
842 | * hw->iops = iops; | |
843 | */ | |
844 | } | |
845 | ||
846 | /** | |
847 | * ide_register_hw_with_fixup - register IDE interface | |
848 | * @hw: hardware registers | |
849 | * @hwifp: pointer to returned hwif | |
850 | * @fixup: fixup function | |
851 | * | |
852 | * Register an IDE interface, specifying exactly the registers etc. | |
853 | * Set init=1 iff calling before probes have taken place. | |
854 | * | |
855 | * Returns -1 on error. | |
856 | */ | |
857 | ||
858 | int ide_register_hw_with_fixup(hw_regs_t *hw, ide_hwif_t **hwifp, void(*fixup)(ide_hwif_t *hwif)) | |
859 | { | |
860 | int index, retry = 1; | |
861 | ide_hwif_t *hwif; | |
862 | ||
863 | do { | |
864 | for (index = 0; index < MAX_HWIFS; ++index) { | |
865 | hwif = &ide_hwifs[index]; | |
866 | if (hwif->hw.io_ports[IDE_DATA_OFFSET] == hw->io_ports[IDE_DATA_OFFSET]) | |
867 | goto found; | |
868 | } | |
869 | for (index = 0; index < MAX_HWIFS; ++index) { | |
870 | hwif = &ide_hwifs[index]; | |
871 | if (hwif->hold) | |
872 | continue; | |
873 | if ((!hwif->present && !hwif->mate && !initializing) || | |
874 | (!hwif->hw.io_ports[IDE_DATA_OFFSET] && initializing)) | |
875 | goto found; | |
876 | } | |
877 | for (index = 0; index < MAX_HWIFS; index++) | |
878 | ide_unregister(index); | |
879 | } while (retry--); | |
880 | return -1; | |
881 | found: | |
882 | if (hwif->present) | |
883 | ide_unregister(index); | |
884 | else if (!hwif->hold) { | |
885 | init_hwif_data(hwif, index); | |
886 | init_hwif_default(hwif, index); | |
887 | } | |
888 | if (hwif->present) | |
889 | return -1; | |
890 | memcpy(&hwif->hw, hw, sizeof(*hw)); | |
891 | memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports)); | |
892 | hwif->irq = hw->irq; | |
893 | hwif->noprobe = 0; | |
894 | hwif->chipset = hw->chipset; | |
895 | ||
896 | if (!initializing) { | |
897 | probe_hwif_init_with_fixup(hwif, fixup); | |
898 | create_proc_ide_interfaces(); | |
899 | } | |
900 | ||
901 | if (hwifp) | |
902 | *hwifp = hwif; | |
903 | ||
904 | return (initializing || hwif->present) ? index : -1; | |
905 | } | |
906 | ||
907 | EXPORT_SYMBOL(ide_register_hw_with_fixup); | |
908 | ||
909 | int ide_register_hw(hw_regs_t *hw, ide_hwif_t **hwifp) | |
910 | { | |
911 | return ide_register_hw_with_fixup(hw, hwifp, NULL); | |
912 | } | |
913 | ||
914 | EXPORT_SYMBOL(ide_register_hw); | |
915 | ||
916 | /* | |
917 | * Locks for IDE setting functionality | |
918 | */ | |
919 | ||
920 | DECLARE_MUTEX(ide_setting_sem); | |
921 | ||
922 | /** | |
923 | * __ide_add_setting - add an ide setting option | |
924 | * @drive: drive to use | |
925 | * @name: setting name | |
926 | * @rw: true if the function is read write | |
927 | * @read_ioctl: function to call on read | |
928 | * @write_ioctl: function to call on write | |
929 | * @data_type: type of data | |
930 | * @min: range minimum | |
931 | * @max: range maximum | |
932 | * @mul_factor: multiplication scale | |
933 | * @div_factor: divison scale | |
934 | * @data: private data field | |
935 | * @set: setting | |
936 | * @auto_remove: setting auto removal flag | |
937 | * | |
938 | * Removes the setting named from the device if it is present. | |
939 | * The function takes the settings_lock to protect against | |
940 | * parallel changes. This function must not be called from IRQ | |
941 | * context. Returns 0 on success or -1 on failure. | |
942 | * | |
943 | * BUGS: This code is seriously over-engineered. There is also | |
944 | * magic about how the driver specific features are setup. If | |
945 | * a driver is attached we assume the driver settings are auto | |
946 | * remove. | |
947 | */ | |
948 | ||
949 | 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) | |
950 | { | |
951 | ide_settings_t **p = (ide_settings_t **) &drive->settings, *setting = NULL; | |
952 | ||
953 | down(&ide_setting_sem); | |
954 | while ((*p) && strcmp((*p)->name, name) < 0) | |
955 | p = &((*p)->next); | |
956 | if ((setting = kmalloc(sizeof(*setting), GFP_KERNEL)) == NULL) | |
957 | goto abort; | |
958 | memset(setting, 0, sizeof(*setting)); | |
959 | if ((setting->name = kmalloc(strlen(name) + 1, GFP_KERNEL)) == NULL) | |
960 | goto abort; | |
961 | strcpy(setting->name, name); | |
962 | setting->rw = rw; | |
963 | setting->read_ioctl = read_ioctl; | |
964 | setting->write_ioctl = write_ioctl; | |
965 | setting->data_type = data_type; | |
966 | setting->min = min; | |
967 | setting->max = max; | |
968 | setting->mul_factor = mul_factor; | |
969 | setting->div_factor = div_factor; | |
970 | setting->data = data; | |
971 | setting->set = set; | |
972 | ||
973 | setting->next = *p; | |
974 | if (auto_remove) | |
975 | setting->auto_remove = 1; | |
976 | *p = setting; | |
977 | up(&ide_setting_sem); | |
978 | return 0; | |
979 | abort: | |
980 | up(&ide_setting_sem); | |
981 | if (setting) | |
982 | kfree(setting); | |
983 | return -1; | |
984 | } | |
985 | ||
986 | 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) | |
987 | { | |
988 | return __ide_add_setting(drive, name, rw, read_ioctl, write_ioctl, data_type, min, max, mul_factor, div_factor, data, set, 1); | |
989 | } | |
990 | ||
991 | EXPORT_SYMBOL(ide_add_setting); | |
992 | ||
993 | /** | |
994 | * __ide_remove_setting - remove an ide setting option | |
995 | * @drive: drive to use | |
996 | * @name: setting name | |
997 | * | |
998 | * Removes the setting named from the device if it is present. | |
999 | * The caller must hold the setting semaphore. | |
1000 | */ | |
1001 | ||
1002 | static void __ide_remove_setting (ide_drive_t *drive, char *name) | |
1003 | { | |
1004 | ide_settings_t **p, *setting; | |
1005 | ||
1006 | p = (ide_settings_t **) &drive->settings; | |
1007 | ||
1008 | while ((*p) && strcmp((*p)->name, name)) | |
1009 | p = &((*p)->next); | |
1010 | if ((setting = (*p)) == NULL) | |
1011 | return; | |
1012 | ||
1013 | (*p) = setting->next; | |
1014 | ||
1015 | kfree(setting->name); | |
1016 | kfree(setting); | |
1017 | } | |
1018 | ||
1019 | /** | |
1020 | * ide_find_setting_by_ioctl - find a drive specific ioctl | |
1021 | * @drive: drive to scan | |
1022 | * @cmd: ioctl command to handle | |
1023 | * | |
1024 | * Scan's the device setting table for a matching entry and returns | |
1025 | * this or NULL if no entry is found. The caller must hold the | |
1026 | * setting semaphore | |
1027 | */ | |
1028 | ||
1029 | static ide_settings_t *ide_find_setting_by_ioctl (ide_drive_t *drive, int cmd) | |
1030 | { | |
1031 | ide_settings_t *setting = drive->settings; | |
1032 | ||
1033 | while (setting) { | |
1034 | if (setting->read_ioctl == cmd || setting->write_ioctl == cmd) | |
1035 | break; | |
1036 | setting = setting->next; | |
1037 | } | |
1038 | ||
1039 | return setting; | |
1040 | } | |
1041 | ||
1042 | /** | |
1043 | * ide_find_setting_by_name - find a drive specific setting | |
1044 | * @drive: drive to scan | |
1045 | * @name: setting name | |
1046 | * | |
1047 | * Scan's the device setting table for a matching entry and returns | |
1048 | * this or NULL if no entry is found. The caller must hold the | |
1049 | * setting semaphore | |
1050 | */ | |
1051 | ||
1052 | ide_settings_t *ide_find_setting_by_name (ide_drive_t *drive, char *name) | |
1053 | { | |
1054 | ide_settings_t *setting = drive->settings; | |
1055 | ||
1056 | while (setting) { | |
1057 | if (strcmp(setting->name, name) == 0) | |
1058 | break; | |
1059 | setting = setting->next; | |
1060 | } | |
1061 | return setting; | |
1062 | } | |
1063 | ||
1064 | /** | |
1065 | * auto_remove_settings - remove driver specific settings | |
1066 | * @drive: drive | |
1067 | * | |
1068 | * Automatically remove all the driver specific settings for this | |
1069 | * drive. This function may sleep and must not be called from IRQ | |
1070 | * context. The caller must hold ide_setting_sem. | |
1071 | */ | |
1072 | ||
1073 | static void auto_remove_settings (ide_drive_t *drive) | |
1074 | { | |
1075 | ide_settings_t *setting; | |
1076 | repeat: | |
1077 | setting = drive->settings; | |
1078 | while (setting) { | |
1079 | if (setting->auto_remove) { | |
1080 | __ide_remove_setting(drive, setting->name); | |
1081 | goto repeat; | |
1082 | } | |
1083 | setting = setting->next; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | /** | |
1088 | * ide_read_setting - read an IDE setting | |
1089 | * @drive: drive to read from | |
1090 | * @setting: drive setting | |
1091 | * | |
1092 | * Read a drive setting and return the value. The caller | |
1093 | * must hold the ide_setting_sem when making this call. | |
1094 | * | |
1095 | * BUGS: the data return and error are the same return value | |
1096 | * so an error -EINVAL and true return of the same value cannot | |
1097 | * be told apart | |
1098 | */ | |
1099 | ||
1100 | int ide_read_setting (ide_drive_t *drive, ide_settings_t *setting) | |
1101 | { | |
1102 | int val = -EINVAL; | |
1103 | unsigned long flags; | |
1104 | ||
1105 | if ((setting->rw & SETTING_READ)) { | |
1106 | spin_lock_irqsave(&ide_lock, flags); | |
1107 | switch(setting->data_type) { | |
1108 | case TYPE_BYTE: | |
1109 | val = *((u8 *) setting->data); | |
1110 | break; | |
1111 | case TYPE_SHORT: | |
1112 | val = *((u16 *) setting->data); | |
1113 | break; | |
1114 | case TYPE_INT: | |
1115 | case TYPE_INTA: | |
1116 | val = *((u32 *) setting->data); | |
1117 | break; | |
1118 | } | |
1119 | spin_unlock_irqrestore(&ide_lock, flags); | |
1120 | } | |
1121 | return val; | |
1122 | } | |
1123 | ||
1124 | /** | |
1125 | * ide_spin_wait_hwgroup - wait for group | |
1126 | * @drive: drive in the group | |
1127 | * | |
1128 | * Wait for an IDE device group to go non busy and then return | |
1129 | * holding the ide_lock which guards the hwgroup->busy status | |
1130 | * and right to use it. | |
1131 | */ | |
1132 | ||
1133 | int ide_spin_wait_hwgroup (ide_drive_t *drive) | |
1134 | { | |
1135 | ide_hwgroup_t *hwgroup = HWGROUP(drive); | |
1136 | unsigned long timeout = jiffies + (3 * HZ); | |
1137 | ||
1138 | spin_lock_irq(&ide_lock); | |
1139 | ||
1140 | while (hwgroup->busy) { | |
1141 | unsigned long lflags; | |
1142 | spin_unlock_irq(&ide_lock); | |
1143 | local_irq_set(lflags); | |
1144 | if (time_after(jiffies, timeout)) { | |
1145 | local_irq_restore(lflags); | |
1146 | printk(KERN_ERR "%s: channel busy\n", drive->name); | |
1147 | return -EBUSY; | |
1148 | } | |
1149 | local_irq_restore(lflags); | |
1150 | spin_lock_irq(&ide_lock); | |
1151 | } | |
1152 | return 0; | |
1153 | } | |
1154 | ||
1155 | EXPORT_SYMBOL(ide_spin_wait_hwgroup); | |
1156 | ||
1157 | /** | |
1158 | * ide_write_setting - read an IDE setting | |
1159 | * @drive: drive to read from | |
1160 | * @setting: drive setting | |
1161 | * @val: value | |
1162 | * | |
1163 | * Write a drive setting if it is possible. The caller | |
1164 | * must hold the ide_setting_sem when making this call. | |
1165 | * | |
1166 | * BUGS: the data return and error are the same return value | |
1167 | * so an error -EINVAL and true return of the same value cannot | |
1168 | * be told apart | |
1169 | * | |
1170 | * FIXME: This should be changed to enqueue a special request | |
1171 | * to the driver to change settings, and then wait on a sema for completion. | |
1172 | * The current scheme of polling is kludgy, though safe enough. | |
1173 | */ | |
1174 | ||
1175 | int ide_write_setting (ide_drive_t *drive, ide_settings_t *setting, int val) | |
1176 | { | |
1177 | int i; | |
1178 | u32 *p; | |
1179 | ||
1180 | if (!capable(CAP_SYS_ADMIN)) | |
1181 | return -EACCES; | |
1182 | if (!(setting->rw & SETTING_WRITE)) | |
1183 | return -EPERM; | |
1184 | if (val < setting->min || val > setting->max) | |
1185 | return -EINVAL; | |
1186 | if (setting->set) | |
1187 | return setting->set(drive, val); | |
1188 | if (ide_spin_wait_hwgroup(drive)) | |
1189 | return -EBUSY; | |
1190 | switch (setting->data_type) { | |
1191 | case TYPE_BYTE: | |
1192 | *((u8 *) setting->data) = val; | |
1193 | break; | |
1194 | case TYPE_SHORT: | |
1195 | *((u16 *) setting->data) = val; | |
1196 | break; | |
1197 | case TYPE_INT: | |
1198 | *((u32 *) setting->data) = val; | |
1199 | break; | |
1200 | case TYPE_INTA: | |
1201 | p = (u32 *) setting->data; | |
1202 | for (i = 0; i < 1 << PARTN_BITS; i++, p++) | |
1203 | *p = val; | |
1204 | break; | |
1205 | } | |
1206 | spin_unlock_irq(&ide_lock); | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | static int set_io_32bit(ide_drive_t *drive, int arg) | |
1211 | { | |
1212 | drive->io_32bit = arg; | |
1213 | #ifdef CONFIG_BLK_DEV_DTC2278 | |
1214 | if (HWIF(drive)->chipset == ide_dtc2278) | |
1215 | HWIF(drive)->drives[!drive->select.b.unit].io_32bit = arg; | |
1216 | #endif /* CONFIG_BLK_DEV_DTC2278 */ | |
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | static int set_using_dma (ide_drive_t *drive, int arg) | |
1221 | { | |
1222 | #ifdef CONFIG_BLK_DEV_IDEDMA | |
1223 | if (!drive->id || !(drive->id->capability & 1)) | |
1224 | return -EPERM; | |
1225 | if (HWIF(drive)->ide_dma_check == NULL) | |
1226 | return -EPERM; | |
1227 | if (arg) { | |
1228 | if (HWIF(drive)->ide_dma_check(drive)) return -EIO; | |
1229 | if (HWIF(drive)->ide_dma_on(drive)) return -EIO; | |
1230 | } else { | |
1231 | if (__ide_dma_off(drive)) | |
1232 | return -EIO; | |
1233 | } | |
1234 | return 0; | |
1235 | #else | |
1236 | return -EPERM; | |
1237 | #endif | |
1238 | } | |
1239 | ||
1240 | static int set_pio_mode (ide_drive_t *drive, int arg) | |
1241 | { | |
1242 | struct request rq; | |
1243 | ||
1244 | if (!HWIF(drive)->tuneproc) | |
1245 | return -ENOSYS; | |
1246 | if (drive->special.b.set_tune) | |
1247 | return -EBUSY; | |
1248 | ide_init_drive_cmd(&rq); | |
1249 | drive->tune_req = (u8) arg; | |
1250 | drive->special.b.set_tune = 1; | |
1251 | (void) ide_do_drive_cmd(drive, &rq, ide_wait); | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | static int set_xfer_rate (ide_drive_t *drive, int arg) | |
1256 | { | |
1257 | int err = ide_wait_cmd(drive, | |
1258 | WIN_SETFEATURES, (u8) arg, | |
1259 | SETFEATURES_XFER, 0, NULL); | |
1260 | ||
1261 | if (!err && arg) { | |
1262 | ide_set_xfer_rate(drive, (u8) arg); | |
1263 | ide_driveid_update(drive); | |
1264 | } | |
1265 | return err; | |
1266 | } | |
1267 | ||
1268 | /** | |
1269 | * ide_add_generic_settings - generic ide settings | |
1270 | * @drive: drive being configured | |
1271 | * | |
1272 | * Add the generic parts of the system settings to the /proc files and | |
1273 | * ioctls for this IDE device. The caller must not be holding the | |
1274 | * ide_setting_sem. | |
1275 | */ | |
1276 | ||
1277 | void ide_add_generic_settings (ide_drive_t *drive) | |
1278 | { | |
1279 | /* | |
1280 | * drive setting name read/write access read ioctl write ioctl data type min max mul_factor div_factor data pointer set function | |
1281 | */ | |
1282 | __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); | |
1283 | __ide_add_setting(drive, "keepsettings", SETTING_RW, HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, TYPE_BYTE, 0, 1, 1, 1, &drive->keep_settings, NULL, 0); | |
1284 | __ide_add_setting(drive, "nice1", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->nice1, NULL, 0); | |
1285 | __ide_add_setting(drive, "pio_mode", SETTING_WRITE, -1, HDIO_SET_PIO_MODE, TYPE_BYTE, 0, 255, 1, 1, NULL, set_pio_mode, 0); | |
1286 | __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); | |
1287 | __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); | |
1288 | __ide_add_setting(drive, "init_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->init_speed, NULL, 0); | |
1289 | __ide_add_setting(drive, "current_speed", SETTING_RW, -1, -1, TYPE_BYTE, 0, 70, 1, 1, &drive->current_speed, set_xfer_rate, 0); | |
1290 | __ide_add_setting(drive, "number", SETTING_RW, -1, -1, TYPE_BYTE, 0, 3, 1, 1, &drive->dn, NULL, 0); | |
1291 | } | |
1292 | ||
1293 | /** | |
1294 | * system_bus_clock - clock guess | |
1295 | * | |
1296 | * External version of the bus clock guess used by very old IDE drivers | |
1297 | * for things like VLB timings. Should not be used. | |
1298 | */ | |
1299 | ||
1300 | int system_bus_clock (void) | |
1301 | { | |
1302 | return((int) ((!system_bus_speed) ? ide_system_bus_speed() : system_bus_speed )); | |
1303 | } | |
1304 | ||
1305 | EXPORT_SYMBOL(system_bus_clock); | |
1306 | ||
1307 | /* | |
1308 | * Locking is badly broken here - since way back. That sucker is | |
1309 | * root-only, but that's not an excuse... The real question is what | |
1310 | * exclusion rules do we want here. | |
1311 | */ | |
1312 | int ide_replace_subdriver (ide_drive_t *drive, const char *driver) | |
1313 | { | |
1314 | if (!drive->present || drive->usage || drive->dead) | |
1315 | goto abort; | |
1316 | if (DRIVER(drive)->cleanup(drive)) | |
1317 | goto abort; | |
1318 | strlcpy(drive->driver_req, driver, sizeof(drive->driver_req)); | |
1319 | if (ata_attach(drive)) { | |
1320 | spin_lock(&drives_lock); | |
1321 | list_del_init(&drive->list); | |
1322 | spin_unlock(&drives_lock); | |
1323 | drive->driver_req[0] = 0; | |
1324 | ata_attach(drive); | |
1325 | } else { | |
1326 | drive->driver_req[0] = 0; | |
1327 | } | |
1328 | if (drive->driver && !strcmp(drive->driver->name, driver)) | |
1329 | return 0; | |
1330 | abort: | |
1331 | return 1; | |
1332 | } | |
1333 | ||
1334 | /** | |
1335 | * ata_attach - attach an ATA/ATAPI device | |
1336 | * @drive: drive to attach | |
1337 | * | |
1338 | * Takes a drive that is as yet not assigned to any midlayer IDE | |
1339 | * driver (or is assigned to the default driver) and figures out | |
1340 | * which driver would like to own it. If nobody claims the drive | |
1341 | * then it is automatically attached to the default driver used for | |
1342 | * unclaimed objects. | |
1343 | * | |
1344 | * A return of zero indicates attachment to a driver, of one | |
1345 | * attachment to the default driver. | |
1346 | * | |
1347 | * Takes drivers_lock. | |
1348 | */ | |
1349 | ||
1350 | int ata_attach(ide_drive_t *drive) | |
1351 | { | |
1352 | struct list_head *p; | |
1353 | spin_lock(&drivers_lock); | |
1354 | list_for_each(p, &drivers) { | |
1355 | ide_driver_t *driver = list_entry(p, ide_driver_t, drivers); | |
1356 | if (!try_module_get(driver->owner)) | |
1357 | continue; | |
1358 | spin_unlock(&drivers_lock); | |
1359 | if (driver->attach(drive) == 0) { | |
1360 | module_put(driver->owner); | |
1361 | drive->gendev.driver = &driver->gen_driver; | |
1362 | return 0; | |
1363 | } | |
1364 | spin_lock(&drivers_lock); | |
1365 | module_put(driver->owner); | |
1366 | } | |
1367 | drive->gendev.driver = NULL; | |
1368 | spin_unlock(&drivers_lock); | |
1369 | if (ide_register_subdriver(drive, NULL)) | |
1370 | panic("ide: default attach failed"); | |
1371 | return 1; | |
1372 | } | |
1373 | ||
1374 | static int generic_ide_suspend(struct device *dev, pm_message_t state) | |
1375 | { | |
1376 | ide_drive_t *drive = dev->driver_data; | |
1377 | struct request rq; | |
1378 | struct request_pm_state rqpm; | |
1379 | ide_task_t args; | |
1380 | ||
1381 | memset(&rq, 0, sizeof(rq)); | |
1382 | memset(&rqpm, 0, sizeof(rqpm)); | |
1383 | memset(&args, 0, sizeof(args)); | |
1384 | rq.flags = REQ_PM_SUSPEND; | |
1385 | rq.special = &args; | |
1386 | rq.pm = &rqpm; | |
1387 | rqpm.pm_step = ide_pm_state_start_suspend; | |
1388 | rqpm.pm_state = state; | |
1389 | ||
1390 | return ide_do_drive_cmd(drive, &rq, ide_wait); | |
1391 | } | |
1392 | ||
1393 | static int generic_ide_resume(struct device *dev) | |
1394 | { | |
1395 | ide_drive_t *drive = dev->driver_data; | |
1396 | struct request rq; | |
1397 | struct request_pm_state rqpm; | |
1398 | ide_task_t args; | |
1399 | ||
1400 | memset(&rq, 0, sizeof(rq)); | |
1401 | memset(&rqpm, 0, sizeof(rqpm)); | |
1402 | memset(&args, 0, sizeof(args)); | |
1403 | rq.flags = REQ_PM_RESUME; | |
1404 | rq.special = &args; | |
1405 | rq.pm = &rqpm; | |
1406 | rqpm.pm_step = ide_pm_state_start_resume; | |
1407 | rqpm.pm_state = 0; | |
1408 | ||
1409 | return ide_do_drive_cmd(drive, &rq, ide_head_wait); | |
1410 | } | |
1411 | ||
1412 | int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev, | |
1413 | unsigned int cmd, unsigned long arg) | |
1414 | { | |
1415 | ide_settings_t *setting; | |
1416 | ide_driver_t *drv; | |
1417 | int err = 0; | |
1418 | void __user *p = (void __user *)arg; | |
1419 | ||
1420 | down(&ide_setting_sem); | |
1421 | if ((setting = ide_find_setting_by_ioctl(drive, cmd)) != NULL) { | |
1422 | if (cmd == setting->read_ioctl) { | |
1423 | err = ide_read_setting(drive, setting); | |
1424 | up(&ide_setting_sem); | |
1425 | return err >= 0 ? put_user(err, (long __user *)arg) : err; | |
1426 | } else { | |
1427 | if (bdev != bdev->bd_contains) | |
1428 | err = -EINVAL; | |
1429 | else | |
1430 | err = ide_write_setting(drive, setting, arg); | |
1431 | up(&ide_setting_sem); | |
1432 | return err; | |
1433 | } | |
1434 | } | |
1435 | up(&ide_setting_sem); | |
1436 | ||
1437 | switch (cmd) { | |
1438 | case HDIO_GETGEO: | |
1439 | { | |
1440 | struct hd_geometry geom; | |
1441 | if (!p || (drive->media != ide_disk && drive->media != ide_floppy)) return -EINVAL; | |
1442 | geom.heads = drive->bios_head; | |
1443 | geom.sectors = drive->bios_sect; | |
1444 | geom.cylinders = (u16)drive->bios_cyl; /* truncate */ | |
1445 | geom.start = get_start_sect(bdev); | |
1446 | if (copy_to_user(p, &geom, sizeof(struct hd_geometry))) | |
1447 | return -EFAULT; | |
1448 | return 0; | |
1449 | } | |
1450 | ||
1451 | case HDIO_OBSOLETE_IDENTITY: | |
1452 | case HDIO_GET_IDENTITY: | |
1453 | if (bdev != bdev->bd_contains) | |
1454 | return -EINVAL; | |
1455 | if (drive->id_read == 0) | |
1456 | return -ENOMSG; | |
1457 | if (copy_to_user(p, drive->id, (cmd == HDIO_GET_IDENTITY) ? sizeof(*drive->id) : 142)) | |
1458 | return -EFAULT; | |
1459 | return 0; | |
1460 | ||
1461 | case HDIO_GET_NICE: | |
1462 | return put_user(drive->dsc_overlap << IDE_NICE_DSC_OVERLAP | | |
1463 | drive->atapi_overlap << IDE_NICE_ATAPI_OVERLAP | | |
1464 | drive->nice0 << IDE_NICE_0 | | |
1465 | drive->nice1 << IDE_NICE_1 | | |
1466 | drive->nice2 << IDE_NICE_2, | |
1467 | (long __user *) arg); | |
1468 | ||
1469 | #ifdef CONFIG_IDE_TASK_IOCTL | |
1470 | case HDIO_DRIVE_TASKFILE: | |
1471 | if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) | |
1472 | return -EACCES; | |
1473 | switch(drive->media) { | |
1474 | case ide_disk: | |
1475 | return ide_taskfile_ioctl(drive, cmd, arg); | |
1476 | default: | |
1477 | return -ENOMSG; | |
1478 | } | |
1479 | #endif /* CONFIG_IDE_TASK_IOCTL */ | |
1480 | ||
1481 | case HDIO_DRIVE_CMD: | |
1482 | if (!capable(CAP_SYS_RAWIO)) | |
1483 | return -EACCES; | |
1484 | return ide_cmd_ioctl(drive, cmd, arg); | |
1485 | ||
1486 | case HDIO_DRIVE_TASK: | |
1487 | if (!capable(CAP_SYS_RAWIO)) | |
1488 | return -EACCES; | |
1489 | return ide_task_ioctl(drive, cmd, arg); | |
1490 | ||
1491 | case HDIO_SCAN_HWIF: | |
1492 | { | |
1493 | hw_regs_t hw; | |
1494 | int args[3]; | |
1495 | if (!capable(CAP_SYS_RAWIO)) return -EACCES; | |
1496 | if (copy_from_user(args, p, 3 * sizeof(int))) | |
1497 | return -EFAULT; | |
1498 | memset(&hw, 0, sizeof(hw)); | |
1499 | ide_init_hwif_ports(&hw, (unsigned long) args[0], | |
1500 | (unsigned long) args[1], NULL); | |
1501 | hw.irq = args[2]; | |
1502 | if (ide_register_hw(&hw, NULL) == -1) | |
1503 | return -EIO; | |
1504 | return 0; | |
1505 | } | |
1506 | case HDIO_UNREGISTER_HWIF: | |
1507 | if (!capable(CAP_SYS_RAWIO)) return -EACCES; | |
1508 | /* (arg > MAX_HWIFS) checked in function */ | |
1509 | ide_unregister(arg); | |
1510 | return 0; | |
1511 | case HDIO_SET_NICE: | |
1512 | if (!capable(CAP_SYS_ADMIN)) return -EACCES; | |
1513 | if (arg != (arg & ((1 << IDE_NICE_DSC_OVERLAP) | (1 << IDE_NICE_1)))) | |
1514 | return -EPERM; | |
1515 | drive->dsc_overlap = (arg >> IDE_NICE_DSC_OVERLAP) & 1; | |
1516 | drv = *(ide_driver_t **)bdev->bd_disk->private_data; | |
1517 | if (drive->dsc_overlap && !drv->supports_dsc_overlap) { | |
1518 | drive->dsc_overlap = 0; | |
1519 | return -EPERM; | |
1520 | } | |
1521 | drive->nice1 = (arg >> IDE_NICE_1) & 1; | |
1522 | return 0; | |
1523 | case HDIO_DRIVE_RESET: | |
1524 | { | |
1525 | unsigned long flags; | |
1526 | if (!capable(CAP_SYS_ADMIN)) return -EACCES; | |
1527 | ||
1528 | /* | |
1529 | * Abort the current command on the | |
1530 | * group if there is one, taking | |
1531 | * care not to allow anything else | |
1532 | * to be queued and to die on the | |
1533 | * spot if we miss one somehow | |
1534 | */ | |
1535 | ||
1536 | spin_lock_irqsave(&ide_lock, flags); | |
1537 | ||
1538 | ide_abort(drive, "drive reset"); | |
1539 | ||
1540 | if(HWGROUP(drive)->handler) | |
1541 | BUG(); | |
1542 | ||
1543 | /* Ensure nothing gets queued after we | |
1544 | drop the lock. Reset will clear the busy */ | |
1545 | ||
1546 | HWGROUP(drive)->busy = 1; | |
1547 | spin_unlock_irqrestore(&ide_lock, flags); | |
1548 | (void) ide_do_reset(drive); | |
1549 | ||
1550 | return 0; | |
1551 | } | |
1552 | ||
1553 | case CDROMEJECT: | |
1554 | case CDROMCLOSETRAY: | |
1555 | return scsi_cmd_ioctl(file, bdev->bd_disk, cmd, p); | |
1556 | ||
1557 | case HDIO_GET_BUSSTATE: | |
1558 | if (!capable(CAP_SYS_ADMIN)) | |
1559 | return -EACCES; | |
1560 | if (put_user(HWIF(drive)->bus_state, (long __user *)arg)) | |
1561 | return -EFAULT; | |
1562 | return 0; | |
1563 | ||
1564 | case HDIO_SET_BUSSTATE: | |
1565 | if (!capable(CAP_SYS_ADMIN)) | |
1566 | return -EACCES; | |
1567 | if (HWIF(drive)->busproc) | |
1568 | return HWIF(drive)->busproc(drive, (int)arg); | |
1569 | return -EOPNOTSUPP; | |
1570 | default: | |
1571 | return -EINVAL; | |
1572 | } | |
1573 | } | |
1574 | ||
1575 | EXPORT_SYMBOL(generic_ide_ioctl); | |
1576 | ||
1577 | /* | |
1578 | * stridx() returns the offset of c within s, | |
1579 | * or -1 if c is '\0' or not found within s. | |
1580 | */ | |
1581 | static int __init stridx (const char *s, char c) | |
1582 | { | |
1583 | char *i = strchr(s, c); | |
1584 | return (i && c) ? i - s : -1; | |
1585 | } | |
1586 | ||
1587 | /* | |
1588 | * match_parm() does parsing for ide_setup(): | |
1589 | * | |
1590 | * 1. the first char of s must be '='. | |
1591 | * 2. if the remainder matches one of the supplied keywords, | |
1592 | * the index (1 based) of the keyword is negated and returned. | |
1593 | * 3. if the remainder is a series of no more than max_vals numbers | |
1594 | * separated by commas, the numbers are saved in vals[] and a | |
1595 | * count of how many were saved is returned. Base10 is assumed, | |
1596 | * and base16 is allowed when prefixed with "0x". | |
1597 | * 4. otherwise, zero is returned. | |
1598 | */ | |
1599 | static int __init match_parm (char *s, const char *keywords[], int vals[], int max_vals) | |
1600 | { | |
1601 | static const char *decimal = "0123456789"; | |
1602 | static const char *hex = "0123456789abcdef"; | |
1603 | int i, n; | |
1604 | ||
1605 | if (*s++ == '=') { | |
1606 | /* | |
1607 | * Try matching against the supplied keywords, | |
1608 | * and return -(index+1) if we match one | |
1609 | */ | |
1610 | if (keywords != NULL) { | |
1611 | for (i = 0; *keywords != NULL; ++i) { | |
1612 | if (!strcmp(s, *keywords++)) | |
1613 | return -(i+1); | |
1614 | } | |
1615 | } | |
1616 | /* | |
1617 | * Look for a series of no more than "max_vals" | |
1618 | * numeric values separated by commas, in base10, | |
1619 | * or base16 when prefixed with "0x". | |
1620 | * Return a count of how many were found. | |
1621 | */ | |
1622 | for (n = 0; (i = stridx(decimal, *s)) >= 0;) { | |
1623 | vals[n] = i; | |
1624 | while ((i = stridx(decimal, *++s)) >= 0) | |
1625 | vals[n] = (vals[n] * 10) + i; | |
1626 | if (*s == 'x' && !vals[n]) { | |
1627 | while ((i = stridx(hex, *++s)) >= 0) | |
1628 | vals[n] = (vals[n] * 0x10) + i; | |
1629 | } | |
1630 | if (++n == max_vals) | |
1631 | break; | |
1632 | if (*s == ',' || *s == ';') | |
1633 | ++s; | |
1634 | } | |
1635 | if (!*s) | |
1636 | return n; | |
1637 | } | |
1638 | return 0; /* zero = nothing matched */ | |
1639 | } | |
1640 | ||
1641 | #ifdef CONFIG_BLK_DEV_ALI14XX | |
1642 | static int __initdata probe_ali14xx; | |
1643 | extern int ali14xx_init(void); | |
1644 | #endif | |
1645 | #ifdef CONFIG_BLK_DEV_UMC8672 | |
1646 | static int __initdata probe_umc8672; | |
1647 | extern int umc8672_init(void); | |
1648 | #endif | |
1649 | #ifdef CONFIG_BLK_DEV_DTC2278 | |
1650 | static int __initdata probe_dtc2278; | |
1651 | extern int dtc2278_init(void); | |
1652 | #endif | |
1653 | #ifdef CONFIG_BLK_DEV_HT6560B | |
1654 | static int __initdata probe_ht6560b; | |
1655 | extern int ht6560b_init(void); | |
1656 | #endif | |
1657 | #ifdef CONFIG_BLK_DEV_QD65XX | |
1658 | static int __initdata probe_qd65xx; | |
1659 | extern int qd65xx_init(void); | |
1660 | #endif | |
1661 | ||
1662 | static int __initdata is_chipset_set[MAX_HWIFS]; | |
1663 | ||
1664 | /* | |
1665 | * ide_setup() gets called VERY EARLY during initialization, | |
1666 | * to handle kernel "command line" strings beginning with "hdx=" or "ide". | |
1667 | * | |
1668 | * Remember to update Documentation/ide.txt if you change something here. | |
1669 | */ | |
1670 | static int __init ide_setup(char *s) | |
1671 | { | |
1672 | int i, vals[3]; | |
1673 | ide_hwif_t *hwif; | |
1674 | ide_drive_t *drive; | |
1675 | unsigned int hw, unit; | |
1676 | const char max_drive = 'a' + ((MAX_HWIFS * MAX_DRIVES) - 1); | |
1677 | const char max_hwif = '0' + (MAX_HWIFS - 1); | |
1678 | ||
1679 | ||
1680 | if (strncmp(s,"hd",2) == 0 && s[2] == '=') /* hd= is for hd.c */ | |
1681 | return 0; /* driver and not us */ | |
1682 | ||
1683 | if (strncmp(s,"ide",3) && strncmp(s,"idebus",6) && strncmp(s,"hd",2)) | |
1684 | return 0; | |
1685 | ||
1686 | printk(KERN_INFO "ide_setup: %s", s); | |
1687 | init_ide_data (); | |
1688 | ||
1689 | #ifdef CONFIG_BLK_DEV_IDEDOUBLER | |
1690 | if (!strcmp(s, "ide=doubler")) { | |
1691 | extern int ide_doubler; | |
1692 | ||
1693 | printk(" : Enabled support for IDE doublers\n"); | |
1694 | ide_doubler = 1; | |
1695 | return 1; | |
1696 | } | |
1697 | #endif /* CONFIG_BLK_DEV_IDEDOUBLER */ | |
1698 | ||
1699 | if (!strcmp(s, "ide=nodma")) { | |
1700 | printk(" : Prevented DMA\n"); | |
1701 | noautodma = 1; | |
1702 | return 1; | |
1703 | } | |
1704 | ||
1705 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
1706 | if (!strcmp(s, "ide=reverse")) { | |
1707 | ide_scan_direction = 1; | |
1708 | printk(" : Enabled support for IDE inverse scan order.\n"); | |
1709 | return 1; | |
1710 | } | |
1711 | #endif /* CONFIG_BLK_DEV_IDEPCI */ | |
1712 | ||
1713 | /* | |
1714 | * Look for drive options: "hdx=" | |
1715 | */ | |
1716 | if (s[0] == 'h' && s[1] == 'd' && s[2] >= 'a' && s[2] <= max_drive) { | |
1717 | const char *hd_words[] = { | |
1718 | "none", "noprobe", "nowerr", "cdrom", "serialize", | |
1719 | "autotune", "noautotune", "minus8", "swapdata", "bswap", | |
1720 | "minus11", "remap", "remap63", "scsi", NULL }; | |
1721 | unit = s[2] - 'a'; | |
1722 | hw = unit / MAX_DRIVES; | |
1723 | unit = unit % MAX_DRIVES; | |
1724 | hwif = &ide_hwifs[hw]; | |
1725 | drive = &hwif->drives[unit]; | |
1726 | if (strncmp(s + 4, "ide-", 4) == 0) { | |
1727 | strlcpy(drive->driver_req, s + 4, sizeof(drive->driver_req)); | |
1728 | goto done; | |
1729 | } | |
1730 | switch (match_parm(&s[3], hd_words, vals, 3)) { | |
1731 | case -1: /* "none" */ | |
1732 | case -2: /* "noprobe" */ | |
1733 | drive->noprobe = 1; | |
1734 | goto done; | |
1735 | case -3: /* "nowerr" */ | |
1736 | drive->bad_wstat = BAD_R_STAT; | |
1737 | hwif->noprobe = 0; | |
1738 | goto done; | |
1739 | case -4: /* "cdrom" */ | |
1740 | drive->present = 1; | |
1741 | drive->media = ide_cdrom; | |
1742 | /* an ATAPI device ignores DRDY */ | |
1743 | drive->ready_stat = 0; | |
1744 | hwif->noprobe = 0; | |
1745 | goto done; | |
1746 | case -5: /* "serialize" */ | |
1747 | printk(" -- USE \"ide%d=serialize\" INSTEAD", hw); | |
1748 | goto do_serialize; | |
1749 | case -6: /* "autotune" */ | |
1750 | drive->autotune = IDE_TUNE_AUTO; | |
1751 | goto obsolete_option; | |
1752 | case -7: /* "noautotune" */ | |
1753 | drive->autotune = IDE_TUNE_NOAUTO; | |
1754 | goto obsolete_option; | |
1755 | case -9: /* "swapdata" */ | |
1756 | case -10: /* "bswap" */ | |
1757 | drive->bswap = 1; | |
1758 | goto done; | |
1759 | case -12: /* "remap" */ | |
1760 | drive->remap_0_to_1 = 1; | |
1761 | goto done; | |
1762 | case -13: /* "remap63" */ | |
1763 | drive->sect0 = 63; | |
1764 | goto done; | |
1765 | case -14: /* "scsi" */ | |
1766 | drive->scsi = 1; | |
1767 | goto done; | |
1768 | case 3: /* cyl,head,sect */ | |
1769 | drive->media = ide_disk; | |
1770 | drive->ready_stat = READY_STAT; | |
1771 | drive->cyl = drive->bios_cyl = vals[0]; | |
1772 | drive->head = drive->bios_head = vals[1]; | |
1773 | drive->sect = drive->bios_sect = vals[2]; | |
1774 | drive->present = 1; | |
1775 | drive->forced_geom = 1; | |
1776 | hwif->noprobe = 0; | |
1777 | goto done; | |
1778 | default: | |
1779 | goto bad_option; | |
1780 | } | |
1781 | } | |
1782 | ||
1783 | if (s[0] != 'i' || s[1] != 'd' || s[2] != 'e') | |
1784 | goto bad_option; | |
1785 | /* | |
1786 | * Look for bus speed option: "idebus=" | |
1787 | */ | |
1788 | if (s[3] == 'b' && s[4] == 'u' && s[5] == 's') { | |
1789 | if (match_parm(&s[6], NULL, vals, 1) != 1) | |
1790 | goto bad_option; | |
1791 | if (vals[0] >= 20 && vals[0] <= 66) { | |
1792 | idebus_parameter = vals[0]; | |
1793 | } else | |
1794 | printk(" -- BAD BUS SPEED! Expected value from 20 to 66"); | |
1795 | goto done; | |
1796 | } | |
1797 | /* | |
1798 | * Look for interface options: "idex=" | |
1799 | */ | |
1800 | if (s[3] >= '0' && s[3] <= max_hwif) { | |
1801 | /* | |
1802 | * Be VERY CAREFUL changing this: note hardcoded indexes below | |
1803 | * (-8, -9, -10) are reserved to ease the hardcoding. | |
1804 | */ | |
1805 | static const char *ide_words[] = { | |
1806 | "noprobe", "serialize", "autotune", "noautotune", | |
1807 | "reset", "dma", "ata66", "minus8", "minus9", | |
1808 | "minus10", "four", "qd65xx", "ht6560b", "cmd640_vlb", | |
1809 | "dtc2278", "umc8672", "ali14xx", NULL }; | |
1810 | hw = s[3] - '0'; | |
1811 | hwif = &ide_hwifs[hw]; | |
1812 | i = match_parm(&s[4], ide_words, vals, 3); | |
1813 | ||
1814 | /* | |
1815 | * Cryptic check to ensure chipset not already set for hwif. | |
1816 | * Note: we can't depend on hwif->chipset here. | |
1817 | */ | |
1818 | if ((i >= -18 && i <= -11) || (i > 0 && i <= 3)) { | |
1819 | /* chipset already specified */ | |
1820 | if (is_chipset_set[hw]) | |
1821 | goto bad_option; | |
1822 | if (i > -18 && i <= -11) { | |
1823 | /* these drivers are for "ide0=" only */ | |
1824 | if (hw != 0) | |
1825 | goto bad_hwif; | |
1826 | /* chipset already specified for 2nd port */ | |
1827 | if (is_chipset_set[hw+1]) | |
1828 | goto bad_option; | |
1829 | } | |
1830 | is_chipset_set[hw] = 1; | |
1831 | printk("\n"); | |
1832 | } | |
1833 | ||
1834 | switch (i) { | |
1835 | #ifdef CONFIG_BLK_DEV_ALI14XX | |
1836 | case -17: /* "ali14xx" */ | |
1837 | probe_ali14xx = 1; | |
1838 | goto done; | |
1839 | #endif | |
1840 | #ifdef CONFIG_BLK_DEV_UMC8672 | |
1841 | case -16: /* "umc8672" */ | |
1842 | probe_umc8672 = 1; | |
1843 | goto done; | |
1844 | #endif | |
1845 | #ifdef CONFIG_BLK_DEV_DTC2278 | |
1846 | case -15: /* "dtc2278" */ | |
1847 | probe_dtc2278 = 1; | |
1848 | goto done; | |
1849 | #endif | |
1850 | #ifdef CONFIG_BLK_DEV_CMD640 | |
1851 | case -14: /* "cmd640_vlb" */ | |
1852 | { | |
1853 | extern int cmd640_vlb; /* flag for cmd640.c */ | |
1854 | cmd640_vlb = 1; | |
1855 | goto done; | |
1856 | } | |
1857 | #endif | |
1858 | #ifdef CONFIG_BLK_DEV_HT6560B | |
1859 | case -13: /* "ht6560b" */ | |
1860 | probe_ht6560b = 1; | |
1861 | goto done; | |
1862 | #endif | |
1863 | #ifdef CONFIG_BLK_DEV_QD65XX | |
1864 | case -12: /* "qd65xx" */ | |
1865 | probe_qd65xx = 1; | |
1866 | goto done; | |
1867 | #endif | |
1868 | #ifdef CONFIG_BLK_DEV_4DRIVES | |
1869 | case -11: /* "four" drives on one set of ports */ | |
1870 | { | |
1871 | ide_hwif_t *mate = &ide_hwifs[hw^1]; | |
1872 | mate->drives[0].select.all ^= 0x20; | |
1873 | mate->drives[1].select.all ^= 0x20; | |
1874 | hwif->chipset = mate->chipset = ide_4drives; | |
1875 | mate->irq = hwif->irq; | |
1876 | memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports)); | |
1877 | goto do_serialize; | |
1878 | } | |
1879 | #endif /* CONFIG_BLK_DEV_4DRIVES */ | |
1880 | case -10: /* minus10 */ | |
1881 | case -9: /* minus9 */ | |
1882 | case -8: /* minus8 */ | |
1883 | goto bad_option; | |
1884 | case -7: /* ata66 */ | |
1885 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
1886 | hwif->udma_four = 1; | |
1887 | goto obsolete_option; | |
1888 | #else | |
1889 | goto bad_hwif; | |
1890 | #endif | |
1891 | case -6: /* dma */ | |
1892 | hwif->autodma = 1; | |
1893 | goto obsolete_option; | |
1894 | case -5: /* "reset" */ | |
1895 | hwif->reset = 1; | |
1896 | goto obsolete_option; | |
1897 | case -4: /* "noautotune" */ | |
1898 | hwif->drives[0].autotune = IDE_TUNE_NOAUTO; | |
1899 | hwif->drives[1].autotune = IDE_TUNE_NOAUTO; | |
1900 | goto obsolete_option; | |
1901 | case -3: /* "autotune" */ | |
1902 | hwif->drives[0].autotune = IDE_TUNE_AUTO; | |
1903 | hwif->drives[1].autotune = IDE_TUNE_AUTO; | |
1904 | goto obsolete_option; | |
1905 | case -2: /* "serialize" */ | |
1906 | do_serialize: | |
1907 | hwif->mate = &ide_hwifs[hw^1]; | |
1908 | hwif->mate->mate = hwif; | |
1909 | hwif->serialized = hwif->mate->serialized = 1; | |
1910 | goto obsolete_option; | |
1911 | ||
1912 | case -1: /* "noprobe" */ | |
1913 | hwif->noprobe = 1; | |
1914 | goto done; | |
1915 | ||
1916 | case 1: /* base */ | |
1917 | vals[1] = vals[0] + 0x206; /* default ctl */ | |
1918 | case 2: /* base,ctl */ | |
1919 | vals[2] = 0; /* default irq = probe for it */ | |
1920 | case 3: /* base,ctl,irq */ | |
1921 | hwif->hw.irq = vals[2]; | |
1922 | ide_init_hwif_ports(&hwif->hw, (unsigned long) vals[0], (unsigned long) vals[1], &hwif->irq); | |
1923 | memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports)); | |
1924 | hwif->irq = vals[2]; | |
1925 | hwif->noprobe = 0; | |
1926 | hwif->chipset = ide_forced; | |
1927 | goto obsolete_option; | |
1928 | ||
1929 | case 0: goto bad_option; | |
1930 | default: | |
1931 | printk(" -- SUPPORT NOT CONFIGURED IN THIS KERNEL\n"); | |
1932 | return 1; | |
1933 | } | |
1934 | } | |
1935 | bad_option: | |
1936 | printk(" -- BAD OPTION\n"); | |
1937 | return 1; | |
1938 | obsolete_option: | |
1939 | printk(" -- OBSOLETE OPTION, WILL BE REMOVED SOON!\n"); | |
1940 | return 1; | |
1941 | bad_hwif: | |
1942 | printk("-- NOT SUPPORTED ON ide%d", hw); | |
1943 | done: | |
1944 | printk("\n"); | |
1945 | return 1; | |
1946 | } | |
1947 | ||
1948 | extern void pnpide_init(void); | |
1949 | extern void h8300_ide_init(void); | |
1950 | ||
1951 | /* | |
1952 | * probe_for_hwifs() finds/initializes "known" IDE interfaces | |
1953 | */ | |
1954 | static void __init probe_for_hwifs (void) | |
1955 | { | |
1956 | #ifdef CONFIG_BLK_DEV_IDEPCI | |
1957 | ide_scan_pcibus(ide_scan_direction); | |
1958 | #endif /* CONFIG_BLK_DEV_IDEPCI */ | |
1959 | ||
1960 | #ifdef CONFIG_ETRAX_IDE | |
1961 | { | |
1962 | extern void init_e100_ide(void); | |
1963 | init_e100_ide(); | |
1964 | } | |
1965 | #endif /* CONFIG_ETRAX_IDE */ | |
1966 | #ifdef CONFIG_BLK_DEV_CMD640 | |
1967 | { | |
1968 | extern void ide_probe_for_cmd640x(void); | |
1969 | ide_probe_for_cmd640x(); | |
1970 | } | |
1971 | #endif /* CONFIG_BLK_DEV_CMD640 */ | |
1972 | #ifdef CONFIG_BLK_DEV_IDE_PMAC | |
1973 | { | |
1974 | extern void pmac_ide_probe(void); | |
1975 | pmac_ide_probe(); | |
1976 | } | |
1977 | #endif /* CONFIG_BLK_DEV_IDE_PMAC */ | |
1978 | #ifdef CONFIG_BLK_DEV_GAYLE | |
1979 | { | |
1980 | extern void gayle_init(void); | |
1981 | gayle_init(); | |
1982 | } | |
1983 | #endif /* CONFIG_BLK_DEV_GAYLE */ | |
1984 | #ifdef CONFIG_BLK_DEV_FALCON_IDE | |
1985 | { | |
1986 | extern void falconide_init(void); | |
1987 | falconide_init(); | |
1988 | } | |
1989 | #endif /* CONFIG_BLK_DEV_FALCON_IDE */ | |
1990 | #ifdef CONFIG_BLK_DEV_MAC_IDE | |
1991 | { | |
1992 | extern void macide_init(void); | |
1993 | macide_init(); | |
1994 | } | |
1995 | #endif /* CONFIG_BLK_DEV_MAC_IDE */ | |
1996 | #ifdef CONFIG_BLK_DEV_Q40IDE | |
1997 | { | |
1998 | extern void q40ide_init(void); | |
1999 | q40ide_init(); | |
2000 | } | |
2001 | #endif /* CONFIG_BLK_DEV_Q40IDE */ | |
2002 | #ifdef CONFIG_BLK_DEV_BUDDHA | |
2003 | { | |
2004 | extern void buddha_init(void); | |
2005 | buddha_init(); | |
2006 | } | |
2007 | #endif /* CONFIG_BLK_DEV_BUDDHA */ | |
2008 | #ifdef CONFIG_BLK_DEV_IDEPNP | |
2009 | pnpide_init(); | |
2010 | #endif | |
2011 | #ifdef CONFIG_H8300 | |
2012 | h8300_ide_init(); | |
2013 | #endif | |
2014 | } | |
2015 | ||
2016 | int ide_register_subdriver(ide_drive_t *drive, ide_driver_t *driver) | |
2017 | { | |
2018 | unsigned long flags; | |
2019 | ||
2020 | spin_lock_irqsave(&ide_lock, flags); | |
2021 | if (!drive->present || drive->driver != NULL || | |
2022 | drive->usage || drive->dead) { | |
2023 | spin_unlock_irqrestore(&ide_lock, flags); | |
2024 | return 1; | |
2025 | } | |
2026 | drive->driver = driver; | |
2027 | spin_unlock_irqrestore(&ide_lock, flags); | |
2028 | spin_lock(&drives_lock); | |
2029 | list_add_tail(&drive->list, driver ? &driver->drives : &ide_drives); | |
2030 | spin_unlock(&drives_lock); | |
2031 | // printk(KERN_INFO "%s: attached %s driver.\n", drive->name, driver->name); | |
2032 | #ifdef CONFIG_PROC_FS | |
2033 | if (driver) | |
2034 | ide_add_proc_entries(drive->proc, driver->proc, drive); | |
2035 | #endif | |
2036 | return 0; | |
2037 | } | |
2038 | ||
2039 | EXPORT_SYMBOL(ide_register_subdriver); | |
2040 | ||
2041 | /** | |
2042 | * ide_unregister_subdriver - disconnect drive from driver | |
2043 | * @drive: drive to unplug | |
2044 | * | |
2045 | * Disconnect a drive from the driver it was attached to and then | |
2046 | * clean up the various proc files and other objects attached to it. | |
2047 | * | |
2048 | * Takes ide_setting_sem, ide_lock and drives_lock. | |
2049 | * Caller must hold none of the locks. | |
2050 | * | |
2051 | * No locking versus subdriver unload because we are moving to the | |
2052 | * default driver anyway. Wants double checking. | |
2053 | */ | |
2054 | ||
2055 | int ide_unregister_subdriver (ide_drive_t *drive) | |
2056 | { | |
2057 | unsigned long flags; | |
2058 | ||
2059 | down(&ide_setting_sem); | |
2060 | spin_lock_irqsave(&ide_lock, flags); | |
2061 | if (drive->usage || drive->driver == NULL || DRIVER(drive)->busy) { | |
2062 | spin_unlock_irqrestore(&ide_lock, flags); | |
2063 | up(&ide_setting_sem); | |
2064 | return 1; | |
2065 | } | |
2066 | #ifdef CONFIG_PROC_FS | |
2067 | ide_remove_proc_entries(drive->proc, DRIVER(drive)->proc); | |
2068 | #endif | |
2069 | auto_remove_settings(drive); | |
2070 | drive->driver = NULL; | |
2071 | spin_unlock_irqrestore(&ide_lock, flags); | |
2072 | up(&ide_setting_sem); | |
2073 | spin_lock(&drives_lock); | |
2074 | list_del_init(&drive->list); | |
2075 | spin_unlock(&drives_lock); | |
2076 | /* drive will be added to &ide_drives in ata_attach() */ | |
2077 | return 0; | |
2078 | } | |
2079 | ||
2080 | EXPORT_SYMBOL(ide_unregister_subdriver); | |
2081 | ||
2082 | static int ide_drive_remove(struct device * dev) | |
2083 | { | |
2084 | ide_drive_t * drive = container_of(dev,ide_drive_t,gendev); | |
2085 | DRIVER(drive)->cleanup(drive); | |
2086 | return 0; | |
2087 | } | |
2088 | ||
2089 | /** | |
2090 | * ide_register_driver - register IDE device driver | |
2091 | * @driver: the IDE device driver | |
2092 | * | |
2093 | * Register a new device driver and then scan the devices | |
2094 | * on the IDE bus in case any should be attached to the | |
2095 | * driver we have just registered. If so attach them. | |
2096 | * | |
2097 | * Takes drivers_lock and drives_lock. | |
2098 | */ | |
2099 | ||
2100 | int ide_register_driver(ide_driver_t *driver) | |
2101 | { | |
2102 | struct list_head list; | |
2103 | struct list_head *list_loop; | |
2104 | struct list_head *tmp_storage; | |
2105 | ||
2106 | spin_lock(&drivers_lock); | |
2107 | list_add(&driver->drivers, &drivers); | |
2108 | spin_unlock(&drivers_lock); | |
2109 | ||
2110 | INIT_LIST_HEAD(&list); | |
2111 | spin_lock(&drives_lock); | |
2112 | list_splice_init(&ide_drives, &list); | |
2113 | spin_unlock(&drives_lock); | |
2114 | ||
2115 | list_for_each_safe(list_loop, tmp_storage, &list) { | |
2116 | ide_drive_t *drive = container_of(list_loop, ide_drive_t, list); | |
2117 | list_del_init(&drive->list); | |
2118 | if (drive->present) | |
2119 | ata_attach(drive); | |
2120 | } | |
2121 | driver->gen_driver.name = (char *) driver->name; | |
2122 | driver->gen_driver.bus = &ide_bus_type; | |
2123 | driver->gen_driver.remove = ide_drive_remove; | |
2124 | return driver_register(&driver->gen_driver); | |
2125 | } | |
2126 | ||
2127 | EXPORT_SYMBOL(ide_register_driver); | |
2128 | ||
2129 | /** | |
2130 | * ide_unregister_driver - unregister IDE device driver | |
2131 | * @driver: the IDE device driver | |
2132 | * | |
2133 | * Called when a driver module is being unloaded. We reattach any | |
2134 | * devices to whatever driver claims them next (typically the default | |
2135 | * driver). | |
2136 | * | |
2137 | * Takes drivers_lock and called functions will take ide_setting_sem. | |
2138 | */ | |
2139 | ||
2140 | void ide_unregister_driver(ide_driver_t *driver) | |
2141 | { | |
2142 | ide_drive_t *drive; | |
2143 | ||
2144 | spin_lock(&drivers_lock); | |
2145 | list_del(&driver->drivers); | |
2146 | spin_unlock(&drivers_lock); | |
2147 | ||
2148 | driver_unregister(&driver->gen_driver); | |
2149 | ||
2150 | while(!list_empty(&driver->drives)) { | |
2151 | drive = list_entry(driver->drives.next, ide_drive_t, list); | |
2152 | if (driver->cleanup(drive)) { | |
2153 | printk(KERN_ERR "%s: cleanup_module() called while still busy\n", drive->name); | |
2154 | BUG(); | |
2155 | } | |
2156 | ata_attach(drive); | |
2157 | } | |
2158 | } | |
2159 | ||
2160 | EXPORT_SYMBOL(ide_unregister_driver); | |
2161 | ||
2162 | /* | |
2163 | * Probe module | |
2164 | */ | |
2165 | ||
2166 | EXPORT_SYMBOL(ide_lock); | |
2167 | ||
2168 | struct bus_type ide_bus_type = { | |
2169 | .name = "ide", | |
2170 | .suspend = generic_ide_suspend, | |
2171 | .resume = generic_ide_resume, | |
2172 | }; | |
2173 | ||
2174 | /* | |
2175 | * This is gets invoked once during initialization, to set *everything* up | |
2176 | */ | |
2177 | static int __init ide_init(void) | |
2178 | { | |
2179 | printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n"); | |
2180 | devfs_mk_dir("ide"); | |
2181 | system_bus_speed = ide_system_bus_speed(); | |
2182 | ||
2183 | bus_register(&ide_bus_type); | |
2184 | ||
2185 | init_ide_data(); | |
2186 | ||
2187 | #ifdef CONFIG_PROC_FS | |
2188 | proc_ide_root = proc_mkdir("ide", NULL); | |
2189 | #endif | |
2190 | ||
2191 | #ifdef CONFIG_BLK_DEV_ALI14XX | |
2192 | if (probe_ali14xx) | |
2193 | (void)ali14xx_init(); | |
2194 | #endif | |
2195 | #ifdef CONFIG_BLK_DEV_UMC8672 | |
2196 | if (probe_umc8672) | |
2197 | (void)umc8672_init(); | |
2198 | #endif | |
2199 | #ifdef CONFIG_BLK_DEV_DTC2278 | |
2200 | if (probe_dtc2278) | |
2201 | (void)dtc2278_init(); | |
2202 | #endif | |
2203 | #ifdef CONFIG_BLK_DEV_HT6560B | |
2204 | if (probe_ht6560b) | |
2205 | (void)ht6560b_init(); | |
2206 | #endif | |
2207 | #ifdef CONFIG_BLK_DEV_QD65XX | |
2208 | if (probe_qd65xx) | |
2209 | (void)qd65xx_init(); | |
2210 | #endif | |
2211 | ||
2212 | initializing = 1; | |
2213 | /* Probe for special PCI and other "known" interface chipsets. */ | |
2214 | probe_for_hwifs(); | |
2215 | initializing = 0; | |
2216 | ||
2217 | #ifdef CONFIG_PROC_FS | |
2218 | proc_ide_create(); | |
2219 | #endif | |
2220 | return 0; | |
2221 | } | |
2222 | ||
2223 | #ifdef MODULE | |
2224 | static char *options = NULL; | |
2225 | module_param(options, charp, 0); | |
2226 | MODULE_LICENSE("GPL"); | |
2227 | ||
2228 | static void __init parse_options (char *line) | |
2229 | { | |
2230 | char *next = line; | |
2231 | ||
2232 | if (line == NULL || !*line) | |
2233 | return; | |
2234 | while ((line = next) != NULL) { | |
2235 | if ((next = strchr(line,' ')) != NULL) | |
2236 | *next++ = 0; | |
2237 | if (!ide_setup(line)) | |
2238 | printk (KERN_INFO "Unknown option '%s'\n", line); | |
2239 | } | |
2240 | } | |
2241 | ||
2242 | int init_module (void) | |
2243 | { | |
2244 | parse_options(options); | |
2245 | return ide_init(); | |
2246 | } | |
2247 | ||
2248 | void cleanup_module (void) | |
2249 | { | |
2250 | int index; | |
2251 | ||
2252 | for (index = 0; index < MAX_HWIFS; ++index) | |
2253 | ide_unregister(index); | |
2254 | ||
2255 | #ifdef CONFIG_PROC_FS | |
2256 | proc_ide_destroy(); | |
2257 | #endif | |
2258 | devfs_remove("ide"); | |
2259 | ||
2260 | bus_unregister(&ide_bus_type); | |
2261 | } | |
2262 | ||
2263 | #else /* !MODULE */ | |
2264 | ||
2265 | __setup("", ide_setup); | |
2266 | ||
2267 | module_init(ide_init); | |
2268 | ||
2269 | #endif /* MODULE */ |