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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/pci/cs5530.c Version 0.7 Sept 10, 2002 | |
3 | * | |
4 | * Copyright (C) 2000 Andre Hedrick <andre@linux-ide.org> | |
5 | * Ditto of GNU General Public License. | |
6 | * | |
7 | * Copyright (C) 2000 Mark Lord <mlord@pobox.com> | |
8 | * May be copied or modified under the terms of the GNU General Public License | |
9 | * | |
10 | * Development of this chipset driver was funded | |
11 | * by the nice folks at National Semiconductor. | |
12 | * | |
13 | * Documentation: | |
14 | * CS5530 documentation available from National Semiconductor. | |
15 | */ | |
16 | ||
1da177e4 LT |
17 | #include <linux/module.h> |
18 | #include <linux/types.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/timer.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/ioport.h> | |
24 | #include <linux/blkdev.h> | |
25 | #include <linux/hdreg.h> | |
26 | #include <linux/interrupt.h> | |
27 | #include <linux/pci.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/ide.h> | |
30 | #include <asm/io.h> | |
31 | #include <asm/irq.h> | |
32 | ||
33 | /** | |
34 | * cs5530_xfer_set_mode - set a new transfer mode at the drive | |
35 | * @drive: drive to tune | |
36 | * @mode: new mode | |
37 | * | |
38 | * Logging wrapper to the IDE driver speed configuration. This can | |
39 | * probably go away now. | |
40 | */ | |
41 | ||
42 | static int cs5530_set_xfer_mode (ide_drive_t *drive, u8 mode) | |
43 | { | |
44 | printk(KERN_DEBUG "%s: cs5530_set_xfer_mode(%s)\n", | |
45 | drive->name, ide_xfer_verbose(mode)); | |
46 | return (ide_config_drive_speed(drive, mode)); | |
47 | } | |
48 | ||
49 | /* | |
50 | * Here are the standard PIO mode 0-4 timings for each "format". | |
51 | * Format-0 uses fast data reg timings, with slower command reg timings. | |
52 | * Format-1 uses fast timings for all registers, but won't work with all drives. | |
53 | */ | |
54 | static unsigned int cs5530_pio_timings[2][5] = { | |
55 | {0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010}, | |
56 | {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010} | |
57 | }; | |
58 | ||
59 | /* | |
60 | * After chip reset, the PIO timings are set to 0x0000e132, which is not valid. | |
61 | */ | |
62 | #define CS5530_BAD_PIO(timings) (((timings)&~0x80000000)==0x0000e132) | |
63 | #define CS5530_BASEREG(hwif) (((hwif)->dma_base & ~0xf) + ((hwif)->channel ? 0x30 : 0x20)) | |
64 | ||
65 | /** | |
66 | * cs5530_tuneproc - select/set PIO modes | |
67 | * | |
68 | * cs5530_tuneproc() handles selection/setting of PIO modes | |
69 | * for both the chipset and drive. | |
70 | * | |
71 | * The ide_init_cs5530() routine guarantees that all drives | |
72 | * will have valid default PIO timings set up before we get here. | |
73 | */ | |
74 | ||
75 | static void cs5530_tuneproc (ide_drive_t *drive, u8 pio) /* pio=255 means "autotune" */ | |
76 | { | |
77 | ide_hwif_t *hwif = HWIF(drive); | |
78 | unsigned int format; | |
79 | unsigned long basereg = CS5530_BASEREG(hwif); | |
80 | static u8 modes[5] = { XFER_PIO_0, XFER_PIO_1, XFER_PIO_2, XFER_PIO_3, XFER_PIO_4}; | |
81 | ||
82 | pio = ide_get_best_pio_mode(drive, pio, 4, NULL); | |
83 | if (!cs5530_set_xfer_mode(drive, modes[pio])) { | |
84 | format = (hwif->INL(basereg+4) >> 31) & 1; | |
85 | hwif->OUTL(cs5530_pio_timings[format][pio], | |
86 | basereg+(drive->select.b.unit<<3)); | |
87 | } | |
88 | } | |
89 | ||
90 | /** | |
91 | * cs5530_config_dma - select/set DMA and UDMA modes | |
92 | * @drive: drive to tune | |
93 | * | |
94 | * cs5530_config_dma() handles selection/setting of DMA/UDMA modes | |
95 | * for both the chipset and drive. The CS5530 has limitations about | |
96 | * mixing DMA/UDMA on the same cable. | |
97 | */ | |
98 | ||
99 | static int cs5530_config_dma (ide_drive_t *drive) | |
100 | { | |
101 | int udma_ok = 1, mode = 0; | |
102 | ide_hwif_t *hwif = HWIF(drive); | |
103 | int unit = drive->select.b.unit; | |
104 | ide_drive_t *mate = &hwif->drives[unit^1]; | |
105 | struct hd_driveid *id = drive->id; | |
106 | unsigned int reg, timings; | |
107 | unsigned long basereg; | |
108 | ||
109 | /* | |
110 | * Default to DMA-off in case we run into trouble here. | |
111 | */ | |
112 | hwif->ide_dma_off_quietly(drive); | |
113 | /* turn off DMA while we fiddle */ | |
114 | hwif->ide_dma_host_off(drive); | |
115 | /* clear DMA_capable bit */ | |
116 | ||
117 | /* | |
118 | * The CS5530 specifies that two drives sharing a cable cannot | |
119 | * mix UDMA/MDMA. It has to be one or the other, for the pair, | |
120 | * though different timings can still be chosen for each drive. | |
121 | * We could set the appropriate timing bits on the fly, | |
122 | * but that might be a bit confusing. So, for now we statically | |
123 | * handle this requirement by looking at our mate drive to see | |
124 | * what it is capable of, before choosing a mode for our own drive. | |
125 | * | |
126 | * Note: This relies on the fact we never fail from UDMA to MWDMA_2 | |
127 | * but instead drop to PIO | |
128 | */ | |
129 | if (mate->present) { | |
130 | struct hd_driveid *mateid = mate->id; | |
131 | if (mateid && (mateid->capability & 1) && | |
132 | !__ide_dma_bad_drive(mate)) { | |
133 | if ((mateid->field_valid & 4) && | |
134 | (mateid->dma_ultra & 7)) | |
135 | udma_ok = 1; | |
136 | else if ((mateid->field_valid & 2) && | |
137 | (mateid->dma_mword & 7)) | |
138 | udma_ok = 0; | |
139 | else | |
140 | udma_ok = 1; | |
141 | } | |
142 | } | |
143 | ||
144 | /* | |
145 | * Now see what the current drive is capable of, | |
146 | * selecting UDMA only if the mate said it was ok. | |
147 | */ | |
148 | if (id && (id->capability & 1) && drive->autodma && | |
149 | !__ide_dma_bad_drive(drive)) { | |
150 | if (udma_ok && (id->field_valid & 4) && (id->dma_ultra & 7)) { | |
151 | if (id->dma_ultra & 4) | |
152 | mode = XFER_UDMA_2; | |
153 | else if (id->dma_ultra & 2) | |
154 | mode = XFER_UDMA_1; | |
155 | else if (id->dma_ultra & 1) | |
156 | mode = XFER_UDMA_0; | |
157 | } | |
158 | if (!mode && (id->field_valid & 2) && (id->dma_mword & 7)) { | |
159 | if (id->dma_mword & 4) | |
160 | mode = XFER_MW_DMA_2; | |
161 | else if (id->dma_mword & 2) | |
162 | mode = XFER_MW_DMA_1; | |
163 | else if (id->dma_mword & 1) | |
164 | mode = XFER_MW_DMA_0; | |
165 | } | |
166 | } | |
167 | ||
168 | /* | |
169 | * Tell the drive to switch to the new mode; abort on failure. | |
170 | */ | |
171 | if (!mode || cs5530_set_xfer_mode(drive, mode)) | |
172 | return 1; /* failure */ | |
173 | ||
174 | /* | |
175 | * Now tune the chipset to match the drive: | |
176 | */ | |
177 | switch (mode) { | |
178 | case XFER_UDMA_0: timings = 0x00921250; break; | |
179 | case XFER_UDMA_1: timings = 0x00911140; break; | |
180 | case XFER_UDMA_2: timings = 0x00911030; break; | |
181 | case XFER_MW_DMA_0: timings = 0x00077771; break; | |
182 | case XFER_MW_DMA_1: timings = 0x00012121; break; | |
183 | case XFER_MW_DMA_2: timings = 0x00002020; break; | |
184 | default: | |
185 | printk(KERN_ERR "%s: cs5530_config_dma: huh? mode=%02x\n", | |
186 | drive->name, mode); | |
187 | return 1; /* failure */ | |
188 | } | |
189 | basereg = CS5530_BASEREG(hwif); | |
190 | reg = hwif->INL(basereg+4); /* get drive0 config register */ | |
191 | timings |= reg & 0x80000000; /* preserve PIO format bit */ | |
192 | if (unit == 0) { /* are we configuring drive0? */ | |
193 | hwif->OUTL(timings, basereg+4); /* write drive0 config register */ | |
194 | } else { | |
195 | if (timings & 0x00100000) | |
196 | reg |= 0x00100000; /* enable UDMA timings for both drives */ | |
197 | else | |
198 | reg &= ~0x00100000; /* disable UDMA timings for both drives */ | |
199 | hwif->OUTL(reg, basereg+4); /* write drive0 config register */ | |
200 | hwif->OUTL(timings, basereg+12); /* write drive1 config register */ | |
201 | } | |
202 | (void) hwif->ide_dma_host_on(drive); | |
203 | /* set DMA_capable bit */ | |
204 | ||
205 | /* | |
206 | * Finally, turn DMA on in software, and exit. | |
207 | */ | |
208 | return hwif->ide_dma_on(drive); /* success */ | |
209 | } | |
210 | ||
211 | /** | |
212 | * init_chipset_5530 - set up 5530 bridge | |
213 | * @dev: PCI device | |
214 | * @name: device name | |
215 | * | |
216 | * Initialize the cs5530 bridge for reliable IDE DMA operation. | |
217 | */ | |
218 | ||
88de8e99 | 219 | static unsigned int __devinit init_chipset_cs5530 (struct pci_dev *dev, const char *name) |
1da177e4 LT |
220 | { |
221 | struct pci_dev *master_0 = NULL, *cs5530_0 = NULL; | |
222 | unsigned long flags; | |
223 | ||
224 | dev = NULL; | |
225 | while ((dev = pci_find_device(PCI_VENDOR_ID_CYRIX, PCI_ANY_ID, dev)) != NULL) { | |
226 | switch (dev->device) { | |
227 | case PCI_DEVICE_ID_CYRIX_PCI_MASTER: | |
228 | master_0 = dev; | |
229 | break; | |
230 | case PCI_DEVICE_ID_CYRIX_5530_LEGACY: | |
231 | cs5530_0 = dev; | |
232 | break; | |
233 | } | |
234 | } | |
235 | if (!master_0) { | |
236 | printk(KERN_ERR "%s: unable to locate PCI MASTER function\n", name); | |
237 | return 0; | |
238 | } | |
239 | if (!cs5530_0) { | |
240 | printk(KERN_ERR "%s: unable to locate CS5530 LEGACY function\n", name); | |
241 | return 0; | |
242 | } | |
243 | ||
244 | spin_lock_irqsave(&ide_lock, flags); | |
245 | /* all CPUs (there should only be one CPU with this chipset) */ | |
246 | ||
247 | /* | |
248 | * Enable BusMaster and MemoryWriteAndInvalidate for the cs5530: | |
249 | * --> OR 0x14 into 16-bit PCI COMMAND reg of function 0 of the cs5530 | |
250 | */ | |
251 | ||
252 | pci_set_master(cs5530_0); | |
253 | pci_set_mwi(cs5530_0); | |
254 | ||
255 | /* | |
256 | * Set PCI CacheLineSize to 16-bytes: | |
257 | * --> Write 0x04 into 8-bit PCI CACHELINESIZE reg of function 0 of the cs5530 | |
258 | */ | |
259 | ||
260 | pci_write_config_byte(cs5530_0, PCI_CACHE_LINE_SIZE, 0x04); | |
261 | ||
262 | /* | |
263 | * Disable trapping of UDMA register accesses (Win98 hack): | |
264 | * --> Write 0x5006 into 16-bit reg at offset 0xd0 of function 0 of the cs5530 | |
265 | */ | |
266 | ||
267 | pci_write_config_word(cs5530_0, 0xd0, 0x5006); | |
268 | ||
269 | /* | |
270 | * Bit-1 at 0x40 enables MemoryWriteAndInvalidate on internal X-bus: | |
271 | * The other settings are what is necessary to get the register | |
272 | * into a sane state for IDE DMA operation. | |
273 | */ | |
274 | ||
275 | pci_write_config_byte(master_0, 0x40, 0x1e); | |
276 | ||
277 | /* | |
278 | * Set max PCI burst size (16-bytes seems to work best): | |
279 | * 16bytes: set bit-1 at 0x41 (reg value of 0x16) | |
280 | * all others: clear bit-1 at 0x41, and do: | |
281 | * 128bytes: OR 0x00 at 0x41 | |
282 | * 256bytes: OR 0x04 at 0x41 | |
283 | * 512bytes: OR 0x08 at 0x41 | |
284 | * 1024bytes: OR 0x0c at 0x41 | |
285 | */ | |
286 | ||
287 | pci_write_config_byte(master_0, 0x41, 0x14); | |
288 | ||
289 | /* | |
290 | * These settings are necessary to get the chip | |
291 | * into a sane state for IDE DMA operation. | |
292 | */ | |
293 | ||
294 | pci_write_config_byte(master_0, 0x42, 0x00); | |
295 | pci_write_config_byte(master_0, 0x43, 0xc1); | |
296 | ||
297 | spin_unlock_irqrestore(&ide_lock, flags); | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
302 | /** | |
303 | * init_hwif_cs5530 - initialise an IDE channel | |
304 | * @hwif: IDE to initialize | |
305 | * | |
306 | * This gets invoked by the IDE driver once for each channel. It | |
307 | * performs channel-specific pre-initialization before drive probing. | |
308 | */ | |
309 | ||
88de8e99 | 310 | static void __devinit init_hwif_cs5530 (ide_hwif_t *hwif) |
1da177e4 LT |
311 | { |
312 | unsigned long basereg; | |
313 | u32 d0_timings; | |
314 | hwif->autodma = 0; | |
315 | ||
316 | if (hwif->mate) | |
317 | hwif->serialized = hwif->mate->serialized = 1; | |
318 | ||
319 | hwif->tuneproc = &cs5530_tuneproc; | |
320 | basereg = CS5530_BASEREG(hwif); | |
321 | d0_timings = hwif->INL(basereg+0); | |
322 | if (CS5530_BAD_PIO(d0_timings)) { | |
323 | /* PIO timings not initialized? */ | |
324 | hwif->OUTL(cs5530_pio_timings[(d0_timings>>31)&1][0], basereg+0); | |
325 | if (!hwif->drives[0].autotune) | |
326 | hwif->drives[0].autotune = 1; | |
327 | /* needs autotuning later */ | |
328 | } | |
329 | if (CS5530_BAD_PIO(hwif->INL(basereg+8))) { | |
330 | /* PIO timings not initialized? */ | |
331 | hwif->OUTL(cs5530_pio_timings[(d0_timings>>31)&1][0], basereg+8); | |
332 | if (!hwif->drives[1].autotune) | |
333 | hwif->drives[1].autotune = 1; | |
334 | /* needs autotuning later */ | |
335 | } | |
336 | ||
337 | hwif->atapi_dma = 1; | |
338 | hwif->ultra_mask = 0x07; | |
339 | hwif->mwdma_mask = 0x07; | |
340 | ||
341 | hwif->ide_dma_check = &cs5530_config_dma; | |
342 | if (!noautodma) | |
343 | hwif->autodma = 1; | |
344 | hwif->drives[0].autodma = hwif->autodma; | |
345 | hwif->drives[1].autodma = hwif->autodma; | |
346 | } | |
347 | ||
348 | static ide_pci_device_t cs5530_chipset __devinitdata = { | |
349 | .name = "CS5530", | |
350 | .init_chipset = init_chipset_cs5530, | |
351 | .init_hwif = init_hwif_cs5530, | |
352 | .channels = 2, | |
353 | .autodma = AUTODMA, | |
354 | .bootable = ON_BOARD, | |
355 | }; | |
356 | ||
357 | static int __devinit cs5530_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
358 | { | |
359 | return ide_setup_pci_device(dev, &cs5530_chipset); | |
360 | } | |
361 | ||
362 | static struct pci_device_id cs5530_pci_tbl[] = { | |
363 | { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
364 | { 0, }, | |
365 | }; | |
366 | MODULE_DEVICE_TABLE(pci, cs5530_pci_tbl); | |
367 | ||
368 | static struct pci_driver driver = { | |
369 | .name = "CS5530 IDE", | |
370 | .id_table = cs5530_pci_tbl, | |
371 | .probe = cs5530_init_one, | |
372 | }; | |
373 | ||
374 | static int cs5530_ide_init(void) | |
375 | { | |
376 | return ide_pci_register_driver(&driver); | |
377 | } | |
378 | ||
379 | module_init(cs5530_ide_init); | |
380 | ||
381 | MODULE_AUTHOR("Mark Lord"); | |
382 | MODULE_DESCRIPTION("PCI driver module for Cyrix/NS 5530 IDE"); | |
383 | MODULE_LICENSE("GPL"); |