Commit | Line | Data |
---|---|---|
60e7a82f | 1 | /* |
83a6d4ab | 2 | * linux/drivers/ide/pci/cmd64x.c Version 1.50 May 10, 2007 |
1da177e4 LT |
3 | * |
4 | * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines. | |
1da177e4 LT |
5 | * Due to massive hardware bugs, UltraDMA is only supported |
6 | * on the 646U2 and not on the 646U. | |
7 | * | |
8 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) | |
9 | * Copyright (C) 1998 David S. Miller (davem@redhat.com) | |
10 | * | |
11 | * Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org> | |
f92d50e6 | 12 | * Copyright (C) 2007 MontaVista Software, Inc. <source@mvista.com> |
1da177e4 LT |
13 | */ |
14 | ||
1da177e4 LT |
15 | #include <linux/module.h> |
16 | #include <linux/types.h> | |
17 | #include <linux/pci.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/hdreg.h> | |
20 | #include <linux/ide.h> | |
21 | #include <linux/init.h> | |
22 | ||
23 | #include <asm/io.h> | |
24 | ||
25 | #define DISPLAY_CMD64X_TIMINGS | |
26 | ||
27 | #define CMD_DEBUG 0 | |
28 | ||
29 | #if CMD_DEBUG | |
30 | #define cmdprintk(x...) printk(x) | |
31 | #else | |
32 | #define cmdprintk(x...) | |
33 | #endif | |
34 | ||
35 | /* | |
36 | * CMD64x specific registers definition. | |
37 | */ | |
38 | #define CFR 0x50 | |
e51e2528 | 39 | #define CFR_INTR_CH0 0x04 |
1da177e4 | 40 | #define CNTRL 0x51 |
5826b318 SS |
41 | #define CNTRL_ENA_1ST 0x04 |
42 | #define CNTRL_ENA_2ND 0x08 | |
43 | #define CNTRL_DIS_RA0 0x40 | |
44 | #define CNTRL_DIS_RA1 0x80 | |
1da177e4 LT |
45 | |
46 | #define CMDTIM 0x52 | |
47 | #define ARTTIM0 0x53 | |
48 | #define DRWTIM0 0x54 | |
49 | #define ARTTIM1 0x55 | |
50 | #define DRWTIM1 0x56 | |
51 | #define ARTTIM23 0x57 | |
52 | #define ARTTIM23_DIS_RA2 0x04 | |
53 | #define ARTTIM23_DIS_RA3 0x08 | |
54 | #define ARTTIM23_INTR_CH1 0x10 | |
1da177e4 LT |
55 | #define DRWTIM2 0x58 |
56 | #define BRST 0x59 | |
57 | #define DRWTIM3 0x5b | |
58 | ||
59 | #define BMIDECR0 0x70 | |
60 | #define MRDMODE 0x71 | |
61 | #define MRDMODE_INTR_CH0 0x04 | |
62 | #define MRDMODE_INTR_CH1 0x08 | |
63 | #define MRDMODE_BLK_CH0 0x10 | |
64 | #define MRDMODE_BLK_CH1 0x20 | |
65 | #define BMIDESR0 0x72 | |
66 | #define UDIDETCR0 0x73 | |
67 | #define DTPR0 0x74 | |
68 | #define BMIDECR1 0x78 | |
69 | #define BMIDECSR 0x79 | |
70 | #define BMIDESR1 0x7A | |
71 | #define UDIDETCR1 0x7B | |
72 | #define DTPR1 0x7C | |
73 | ||
ecfd80e4 | 74 | #if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_IDE_PROC_FS) |
1da177e4 LT |
75 | #include <linux/stat.h> |
76 | #include <linux/proc_fs.h> | |
77 | ||
78 | static u8 cmd64x_proc = 0; | |
79 | ||
80 | #define CMD_MAX_DEVS 5 | |
81 | ||
82 | static struct pci_dev *cmd_devs[CMD_MAX_DEVS]; | |
83 | static int n_cmd_devs; | |
84 | ||
85 | static char * print_cmd64x_get_info (char *buf, struct pci_dev *dev, int index) | |
86 | { | |
87 | char *p = buf; | |
1da177e4 LT |
88 | u8 reg72 = 0, reg73 = 0; /* primary */ |
89 | u8 reg7a = 0, reg7b = 0; /* secondary */ | |
5826b318 | 90 | u8 reg50 = 1, reg51 = 1, reg57 = 0, reg71 = 0; /* extra */ |
1da177e4 LT |
91 | |
92 | p += sprintf(p, "\nController: %d\n", index); | |
5826b318 SS |
93 | p += sprintf(p, "PCI-%x Chipset.\n", dev->device); |
94 | ||
1da177e4 | 95 | (void) pci_read_config_byte(dev, CFR, ®50); |
5826b318 SS |
96 | (void) pci_read_config_byte(dev, CNTRL, ®51); |
97 | (void) pci_read_config_byte(dev, ARTTIM23, ®57); | |
1da177e4 LT |
98 | (void) pci_read_config_byte(dev, MRDMODE, ®71); |
99 | (void) pci_read_config_byte(dev, BMIDESR0, ®72); | |
100 | (void) pci_read_config_byte(dev, UDIDETCR0, ®73); | |
101 | (void) pci_read_config_byte(dev, BMIDESR1, ®7a); | |
102 | (void) pci_read_config_byte(dev, UDIDETCR1, ®7b); | |
103 | ||
5826b318 | 104 | /* PCI0643/6 originally didn't have the primary channel enable bit */ |
5826b318 | 105 | if ((dev->device == PCI_DEVICE_ID_CMD_643) || |
44c10138 | 106 | (dev->device == PCI_DEVICE_ID_CMD_646 && dev->revision < 3)) |
5826b318 SS |
107 | reg51 |= CNTRL_ENA_1ST; |
108 | ||
109 | p += sprintf(p, "---------------- Primary Channel " | |
110 | "---------------- Secondary Channel ------------\n"); | |
111 | p += sprintf(p, " %s %s\n", | |
112 | (reg51 & CNTRL_ENA_1ST) ? "enabled " : "disabled", | |
113 | (reg51 & CNTRL_ENA_2ND) ? "enabled " : "disabled"); | |
114 | p += sprintf(p, "---------------- drive0 --------- drive1 " | |
115 | "-------- drive0 --------- drive1 ------\n"); | |
116 | p += sprintf(p, "DMA enabled: %s %s" | |
117 | " %s %s\n", | |
118 | (reg72 & 0x20) ? "yes" : "no ", (reg72 & 0x40) ? "yes" : "no ", | |
119 | (reg7a & 0x20) ? "yes" : "no ", (reg7a & 0x40) ? "yes" : "no "); | |
120 | p += sprintf(p, "UltraDMA mode: %s (%c) %s (%c)", | |
121 | ( reg73 & 0x01) ? " on" : "off", | |
122 | ((reg73 & 0x30) == 0x30) ? ((reg73 & 0x04) ? '3' : '0') : | |
123 | ((reg73 & 0x30) == 0x20) ? ((reg73 & 0x04) ? '3' : '1') : | |
124 | ((reg73 & 0x30) == 0x10) ? ((reg73 & 0x04) ? '4' : '2') : | |
125 | ((reg73 & 0x30) == 0x00) ? ((reg73 & 0x04) ? '5' : '2') : '?', | |
126 | ( reg73 & 0x02) ? " on" : "off", | |
127 | ((reg73 & 0xC0) == 0xC0) ? ((reg73 & 0x08) ? '3' : '0') : | |
128 | ((reg73 & 0xC0) == 0x80) ? ((reg73 & 0x08) ? '3' : '1') : | |
129 | ((reg73 & 0xC0) == 0x40) ? ((reg73 & 0x08) ? '4' : '2') : | |
130 | ((reg73 & 0xC0) == 0x00) ? ((reg73 & 0x08) ? '5' : '2') : '?'); | |
131 | p += sprintf(p, " %s (%c) %s (%c)\n", | |
132 | ( reg7b & 0x01) ? " on" : "off", | |
133 | ((reg7b & 0x30) == 0x30) ? ((reg7b & 0x04) ? '3' : '0') : | |
134 | ((reg7b & 0x30) == 0x20) ? ((reg7b & 0x04) ? '3' : '1') : | |
135 | ((reg7b & 0x30) == 0x10) ? ((reg7b & 0x04) ? '4' : '2') : | |
136 | ((reg7b & 0x30) == 0x00) ? ((reg7b & 0x04) ? '5' : '2') : '?', | |
137 | ( reg7b & 0x02) ? " on" : "off", | |
138 | ((reg7b & 0xC0) == 0xC0) ? ((reg7b & 0x08) ? '3' : '0') : | |
139 | ((reg7b & 0xC0) == 0x80) ? ((reg7b & 0x08) ? '3' : '1') : | |
140 | ((reg7b & 0xC0) == 0x40) ? ((reg7b & 0x08) ? '4' : '2') : | |
141 | ((reg7b & 0xC0) == 0x00) ? ((reg7b & 0x08) ? '5' : '2') : '?'); | |
142 | p += sprintf(p, "Interrupt: %s, %s %s, %s\n", | |
143 | (reg71 & MRDMODE_BLK_CH0 ) ? "blocked" : "enabled", | |
144 | (reg50 & CFR_INTR_CH0 ) ? "pending" : "clear ", | |
145 | (reg71 & MRDMODE_BLK_CH1 ) ? "blocked" : "enabled", | |
146 | (reg57 & ARTTIM23_INTR_CH1) ? "pending" : "clear "); | |
1da177e4 LT |
147 | |
148 | return (char *)p; | |
149 | } | |
150 | ||
151 | static int cmd64x_get_info (char *buffer, char **addr, off_t offset, int count) | |
152 | { | |
153 | char *p = buffer; | |
154 | int i; | |
155 | ||
1da177e4 LT |
156 | for (i = 0; i < n_cmd_devs; i++) { |
157 | struct pci_dev *dev = cmd_devs[i]; | |
158 | p = print_cmd64x_get_info(p, dev, i); | |
159 | } | |
160 | return p-buffer; /* => must be less than 4k! */ | |
161 | } | |
162 | ||
ecfd80e4 | 163 | #endif /* defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_IDE_PROC_FS) */ |
1da177e4 | 164 | |
e277a1aa SS |
165 | static u8 quantize_timing(int timing, int quant) |
166 | { | |
167 | return (timing + quant - 1) / quant; | |
168 | } | |
169 | ||
1da177e4 | 170 | /* |
60e7a82f SS |
171 | * This routine calculates active/recovery counts and then writes them into |
172 | * the chipset registers. | |
1da177e4 | 173 | */ |
60e7a82f | 174 | static void program_cycle_times (ide_drive_t *drive, int cycle_time, int active_time) |
1da177e4 | 175 | { |
60e7a82f SS |
176 | struct pci_dev *dev = HWIF(drive)->pci_dev; |
177 | int clock_time = 1000 / system_bus_clock(); | |
178 | u8 cycle_count, active_count, recovery_count, drwtim; | |
179 | static const u8 recovery_values[] = | |
1da177e4 | 180 | {15, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0}; |
60e7a82f SS |
181 | static const u8 drwtim_regs[4] = {DRWTIM0, DRWTIM1, DRWTIM2, DRWTIM3}; |
182 | ||
183 | cmdprintk("program_cycle_times parameters: total=%d, active=%d\n", | |
184 | cycle_time, active_time); | |
185 | ||
186 | cycle_count = quantize_timing( cycle_time, clock_time); | |
187 | active_count = quantize_timing(active_time, clock_time); | |
188 | recovery_count = cycle_count - active_count; | |
189 | ||
1da177e4 | 190 | /* |
60e7a82f SS |
191 | * In case we've got too long recovery phase, try to lengthen |
192 | * the active phase | |
1da177e4 | 193 | */ |
60e7a82f SS |
194 | if (recovery_count > 16) { |
195 | active_count += recovery_count - 16; | |
196 | recovery_count = 16; | |
1da177e4 | 197 | } |
60e7a82f SS |
198 | if (active_count > 16) /* shouldn't actually happen... */ |
199 | active_count = 16; | |
200 | ||
201 | cmdprintk("Final counts: total=%d, active=%d, recovery=%d\n", | |
202 | cycle_count, active_count, recovery_count); | |
1da177e4 LT |
203 | |
204 | /* | |
205 | * Convert values to internal chipset representation | |
206 | */ | |
60e7a82f SS |
207 | recovery_count = recovery_values[recovery_count]; |
208 | active_count &= 0x0f; | |
1da177e4 | 209 | |
60e7a82f SS |
210 | /* Program the active/recovery counts into the DRWTIM register */ |
211 | drwtim = (active_count << 4) | recovery_count; | |
212 | (void) pci_write_config_byte(dev, drwtim_regs[drive->dn], drwtim); | |
213 | cmdprintk("Write 0x%02x to reg 0x%x\n", drwtim, drwtim_regs[drive->dn]); | |
1da177e4 LT |
214 | } |
215 | ||
216 | /* | |
60e7a82f SS |
217 | * This routine selects drive's best PIO mode and writes into the chipset |
218 | * registers setup/active/recovery timings. | |
1da177e4 | 219 | */ |
f92d50e6 | 220 | static u8 cmd64x_tune_pio (ide_drive_t *drive, u8 mode_wanted) |
1da177e4 | 221 | { |
60e7a82f SS |
222 | ide_hwif_t *hwif = HWIF(drive); |
223 | struct pci_dev *dev = hwif->pci_dev; | |
7dd00083 | 224 | unsigned int cycle_time; |
60e7a82f SS |
225 | u8 pio_mode, setup_count, arttim = 0; |
226 | static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0}; | |
227 | static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23}; | |
7dd00083 | 228 | |
2134758d | 229 | pio_mode = ide_get_best_pio_mode(drive, mode_wanted, 5); |
7dd00083 | 230 | cycle_time = ide_pio_cycle_time(drive, pio_mode); |
1da177e4 | 231 | |
342cdb6d | 232 | cmdprintk("%s: PIO mode wanted %d, selected %d (%d ns)\n", |
7dd00083 | 233 | drive->name, mode_wanted, pio_mode, cycle_time); |
1da177e4 | 234 | |
7dd00083 | 235 | program_cycle_times(drive, cycle_time, |
60e7a82f | 236 | ide_pio_timings[pio_mode].active_time); |
1da177e4 | 237 | |
60e7a82f SS |
238 | setup_count = quantize_timing(ide_pio_timings[pio_mode].setup_time, |
239 | 1000 / system_bus_clock()); | |
240 | ||
241 | /* | |
242 | * The primary channel has individual address setup timing registers | |
243 | * for each drive and the hardware selects the slowest timing itself. | |
244 | * The secondary channel has one common register and we have to select | |
245 | * the slowest address setup timing ourselves. | |
246 | */ | |
247 | if (hwif->channel) { | |
248 | ide_drive_t *drives = hwif->drives; | |
249 | ||
250 | drive->drive_data = setup_count; | |
251 | setup_count = max(drives[0].drive_data, drives[1].drive_data); | |
1da177e4 | 252 | } |
1da177e4 | 253 | |
60e7a82f SS |
254 | if (setup_count > 5) /* shouldn't actually happen... */ |
255 | setup_count = 5; | |
256 | cmdprintk("Final address setup count: %d\n", setup_count); | |
1da177e4 | 257 | |
60e7a82f SS |
258 | /* |
259 | * Program the address setup clocks into the ARTTIM registers. | |
260 | * Avoid clearing the secondary channel's interrupt bit. | |
261 | */ | |
262 | (void) pci_read_config_byte (dev, arttim_regs[drive->dn], &arttim); | |
263 | if (hwif->channel) | |
264 | arttim &= ~ARTTIM23_INTR_CH1; | |
265 | arttim &= ~0xc0; | |
266 | arttim |= setup_values[setup_count]; | |
267 | (void) pci_write_config_byte(dev, arttim_regs[drive->dn], arttim); | |
268 | cmdprintk("Write 0x%02x to reg 0x%x\n", arttim, arttim_regs[drive->dn]); | |
f92d50e6 SS |
269 | |
270 | return pio_mode; | |
271 | } | |
272 | ||
273 | /* | |
274 | * Attempts to set drive's PIO mode. | |
275 | * Special cases are 8: prefetch off, 9: prefetch on (both never worked), | |
276 | * and 255: auto-select best mode (used at boot time). | |
277 | */ | |
278 | static void cmd64x_tune_drive (ide_drive_t *drive, u8 pio) | |
279 | { | |
280 | /* | |
281 | * Filter out the prefetch control values | |
282 | * to prevent PIO5 from being programmed | |
283 | */ | |
284 | if (pio == 8 || pio == 9) | |
285 | return; | |
286 | ||
287 | pio = cmd64x_tune_pio(drive, pio); | |
288 | (void) ide_config_drive_speed(drive, XFER_PIO_0 + pio); | |
1da177e4 LT |
289 | } |
290 | ||
f212ff28 | 291 | static int cmd64x_tune_chipset(ide_drive_t *drive, const u8 speed) |
1da177e4 LT |
292 | { |
293 | ide_hwif_t *hwif = HWIF(drive); | |
294 | struct pci_dev *dev = hwif->pci_dev; | |
60e7a82f SS |
295 | u8 unit = drive->dn & 0x01; |
296 | u8 regU = 0, pciU = hwif->channel ? UDIDETCR1 : UDIDETCR0; | |
1da177e4 | 297 | |
f92d50e6 | 298 | if (speed >= XFER_SW_DMA_0) { |
1da177e4 | 299 | (void) pci_read_config_byte(dev, pciU, ®U); |
1da177e4 | 300 | regU &= ~(unit ? 0xCA : 0x35); |
1da177e4 LT |
301 | } |
302 | ||
303 | switch(speed) { | |
60e7a82f SS |
304 | case XFER_UDMA_5: |
305 | regU |= unit ? 0x0A : 0x05; | |
306 | break; | |
307 | case XFER_UDMA_4: | |
308 | regU |= unit ? 0x4A : 0x15; | |
309 | break; | |
310 | case XFER_UDMA_3: | |
311 | regU |= unit ? 0x8A : 0x25; | |
312 | break; | |
313 | case XFER_UDMA_2: | |
314 | regU |= unit ? 0x42 : 0x11; | |
315 | break; | |
316 | case XFER_UDMA_1: | |
317 | regU |= unit ? 0x82 : 0x21; | |
318 | break; | |
319 | case XFER_UDMA_0: | |
320 | regU |= unit ? 0xC2 : 0x31; | |
321 | break; | |
322 | case XFER_MW_DMA_2: | |
323 | program_cycle_times(drive, 120, 70); | |
324 | break; | |
325 | case XFER_MW_DMA_1: | |
326 | program_cycle_times(drive, 150, 80); | |
327 | break; | |
328 | case XFER_MW_DMA_0: | |
329 | program_cycle_times(drive, 480, 215); | |
330 | break; | |
331 | case XFER_PIO_5: | |
332 | case XFER_PIO_4: | |
333 | case XFER_PIO_3: | |
334 | case XFER_PIO_2: | |
335 | case XFER_PIO_1: | |
336 | case XFER_PIO_0: | |
337 | (void) cmd64x_tune_pio(drive, speed - XFER_PIO_0); | |
338 | break; | |
339 | default: | |
340 | return 1; | |
1da177e4 LT |
341 | } |
342 | ||
60e7a82f | 343 | if (speed >= XFER_SW_DMA_0) |
1da177e4 | 344 | (void) pci_write_config_byte(dev, pciU, regU); |
1da177e4 | 345 | |
60e7a82f | 346 | return ide_config_drive_speed(drive, speed); |
1da177e4 LT |
347 | } |
348 | ||
1da177e4 LT |
349 | static int cmd64x_config_drive_for_dma (ide_drive_t *drive) |
350 | { | |
4728d546 | 351 | if (ide_tune_dma(drive)) |
3608b5d7 | 352 | return 0; |
1da177e4 | 353 | |
d8f4469d | 354 | if (ide_use_fast_pio(drive)) |
f92d50e6 | 355 | cmd64x_tune_drive(drive, 255); |
d8f4469d | 356 | |
3608b5d7 | 357 | return -1; |
1da177e4 LT |
358 | } |
359 | ||
66602c83 | 360 | static int cmd648_ide_dma_end (ide_drive_t *drive) |
1da177e4 | 361 | { |
66602c83 SS |
362 | ide_hwif_t *hwif = HWIF(drive); |
363 | int err = __ide_dma_end(drive); | |
364 | u8 irq_mask = hwif->channel ? MRDMODE_INTR_CH1 : | |
365 | MRDMODE_INTR_CH0; | |
366 | u8 mrdmode = inb(hwif->dma_master + 0x01); | |
367 | ||
368 | /* clear the interrupt bit */ | |
369 | outb(mrdmode | irq_mask, hwif->dma_master + 0x01); | |
370 | ||
371 | return err; | |
1da177e4 LT |
372 | } |
373 | ||
374 | static int cmd64x_ide_dma_end (ide_drive_t *drive) | |
375 | { | |
1da177e4 LT |
376 | ide_hwif_t *hwif = HWIF(drive); |
377 | struct pci_dev *dev = hwif->pci_dev; | |
66602c83 SS |
378 | int irq_reg = hwif->channel ? ARTTIM23 : CFR; |
379 | u8 irq_mask = hwif->channel ? ARTTIM23_INTR_CH1 : | |
380 | CFR_INTR_CH0; | |
381 | u8 irq_stat = 0; | |
382 | int err = __ide_dma_end(drive); | |
1da177e4 | 383 | |
66602c83 SS |
384 | (void) pci_read_config_byte(dev, irq_reg, &irq_stat); |
385 | /* clear the interrupt bit */ | |
386 | (void) pci_write_config_byte(dev, irq_reg, irq_stat | irq_mask); | |
387 | ||
388 | return err; | |
389 | } | |
390 | ||
391 | static int cmd648_ide_dma_test_irq (ide_drive_t *drive) | |
392 | { | |
393 | ide_hwif_t *hwif = HWIF(drive); | |
394 | u8 irq_mask = hwif->channel ? MRDMODE_INTR_CH1 : | |
395 | MRDMODE_INTR_CH0; | |
396 | u8 dma_stat = inb(hwif->dma_status); | |
397 | u8 mrdmode = inb(hwif->dma_master + 0x01); | |
398 | ||
399 | #ifdef DEBUG | |
400 | printk("%s: dma_stat: 0x%02x mrdmode: 0x%02x irq_mask: 0x%02x\n", | |
401 | drive->name, dma_stat, mrdmode, irq_mask); | |
402 | #endif | |
403 | if (!(mrdmode & irq_mask)) | |
404 | return 0; | |
405 | ||
406 | /* return 1 if INTR asserted */ | |
407 | if (dma_stat & 4) | |
408 | return 1; | |
409 | ||
410 | return 0; | |
1da177e4 LT |
411 | } |
412 | ||
413 | static int cmd64x_ide_dma_test_irq (ide_drive_t *drive) | |
414 | { | |
e51e2528 SS |
415 | ide_hwif_t *hwif = HWIF(drive); |
416 | struct pci_dev *dev = hwif->pci_dev; | |
66602c83 SS |
417 | int irq_reg = hwif->channel ? ARTTIM23 : CFR; |
418 | u8 irq_mask = hwif->channel ? ARTTIM23_INTR_CH1 : | |
419 | CFR_INTR_CH0; | |
420 | u8 dma_stat = inb(hwif->dma_status); | |
421 | u8 irq_stat = 0; | |
e51e2528 SS |
422 | |
423 | (void) pci_read_config_byte(dev, irq_reg, &irq_stat); | |
1da177e4 | 424 | |
1da177e4 | 425 | #ifdef DEBUG |
66602c83 SS |
426 | printk("%s: dma_stat: 0x%02x irq_stat: 0x%02x irq_mask: 0x%02x\n", |
427 | drive->name, dma_stat, irq_stat, irq_mask); | |
1da177e4 | 428 | #endif |
66602c83 | 429 | if (!(irq_stat & irq_mask)) |
1da177e4 LT |
430 | return 0; |
431 | ||
432 | /* return 1 if INTR asserted */ | |
66602c83 | 433 | if (dma_stat & 4) |
1da177e4 LT |
434 | return 1; |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | /* | |
440 | * ASUS P55T2P4D with CMD646 chipset revision 0x01 requires the old | |
441 | * event order for DMA transfers. | |
442 | */ | |
443 | ||
444 | static int cmd646_1_ide_dma_end (ide_drive_t *drive) | |
445 | { | |
446 | ide_hwif_t *hwif = HWIF(drive); | |
447 | u8 dma_stat = 0, dma_cmd = 0; | |
448 | ||
449 | drive->waiting_for_dma = 0; | |
450 | /* get DMA status */ | |
0ecdca26 | 451 | dma_stat = inb(hwif->dma_status); |
1da177e4 | 452 | /* read DMA command state */ |
0ecdca26 | 453 | dma_cmd = inb(hwif->dma_command); |
1da177e4 | 454 | /* stop DMA */ |
0ecdca26 | 455 | outb(dma_cmd & ~1, hwif->dma_command); |
1da177e4 | 456 | /* clear the INTR & ERROR bits */ |
0ecdca26 | 457 | outb(dma_stat | 6, hwif->dma_status); |
1da177e4 LT |
458 | /* and free any DMA resources */ |
459 | ide_destroy_dmatable(drive); | |
460 | /* verify good DMA status */ | |
461 | return (dma_stat & 7) != 4; | |
462 | } | |
463 | ||
464 | static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const char *name) | |
465 | { | |
1da177e4 LT |
466 | u8 mrdmode = 0; |
467 | ||
83a6d4ab SS |
468 | if (dev->device == PCI_DEVICE_ID_CMD_646) { |
469 | u8 rev = 0; | |
1da177e4 | 470 | |
83a6d4ab SS |
471 | pci_read_config_byte(dev, PCI_REVISION_ID, &rev); |
472 | ||
473 | switch (rev) { | |
474 | case 0x07: | |
475 | case 0x05: | |
b37c6b84 | 476 | printk("%s: UltraDMA capable\n", name); |
1da177e4 | 477 | break; |
83a6d4ab | 478 | case 0x03: |
1da177e4 | 479 | default: |
b37c6b84 | 480 | printk("%s: MultiWord DMA force limited\n", name); |
83a6d4ab SS |
481 | break; |
482 | case 0x01: | |
483 | printk("%s: MultiWord DMA limited, " | |
484 | "IRQ workaround enabled\n", name); | |
1da177e4 | 485 | break; |
83a6d4ab | 486 | } |
1da177e4 LT |
487 | } |
488 | ||
489 | /* Set a good latency timer and cache line size value. */ | |
490 | (void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64); | |
491 | /* FIXME: pci_set_master() to ensure a good latency timer value */ | |
492 | ||
83a6d4ab SS |
493 | /* |
494 | * Enable interrupts, select MEMORY READ LINE for reads. | |
495 | * | |
496 | * NOTE: although not mentioned in the PCI0646U specs, | |
497 | * bits 0-1 are write only and won't be read back as | |
498 | * set or not -- PCI0646U2 specs clarify this point. | |
1da177e4 | 499 | */ |
83a6d4ab SS |
500 | (void) pci_read_config_byte (dev, MRDMODE, &mrdmode); |
501 | mrdmode &= ~0x30; | |
502 | (void) pci_write_config_byte(dev, MRDMODE, (mrdmode | 0x02)); | |
1da177e4 | 503 | |
ecfd80e4 | 504 | #if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_IDE_PROC_FS) |
1da177e4 LT |
505 | |
506 | cmd_devs[n_cmd_devs++] = dev; | |
507 | ||
508 | if (!cmd64x_proc) { | |
509 | cmd64x_proc = 1; | |
510 | ide_pci_create_host_proc("cmd64x", cmd64x_get_info); | |
511 | } | |
ecfd80e4 | 512 | #endif /* DISPLAY_CMD64X_TIMINGS && CONFIG_IDE_PROC_FS */ |
1da177e4 LT |
513 | |
514 | return 0; | |
515 | } | |
516 | ||
49521f97 | 517 | static u8 __devinit ata66_cmd64x(ide_hwif_t *hwif) |
1da177e4 | 518 | { |
83a6d4ab SS |
519 | struct pci_dev *dev = hwif->pci_dev; |
520 | u8 bmidecsr = 0, mask = hwif->channel ? 0x02 : 0x01; | |
1da177e4 | 521 | |
83a6d4ab SS |
522 | switch (dev->device) { |
523 | case PCI_DEVICE_ID_CMD_648: | |
524 | case PCI_DEVICE_ID_CMD_649: | |
525 | pci_read_config_byte(dev, BMIDECSR, &bmidecsr); | |
49521f97 | 526 | return (bmidecsr & mask) ? ATA_CBL_PATA80 : ATA_CBL_PATA40; |
83a6d4ab | 527 | default: |
49521f97 | 528 | return ATA_CBL_PATA40; |
1da177e4 | 529 | } |
1da177e4 LT |
530 | } |
531 | ||
532 | static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif) | |
533 | { | |
534 | struct pci_dev *dev = hwif->pci_dev; | |
83a6d4ab | 535 | u8 rev = 0; |
1da177e4 | 536 | |
83a6d4ab | 537 | pci_read_config_byte(dev, PCI_REVISION_ID, &rev); |
1da177e4 | 538 | |
f92d50e6 | 539 | hwif->tuneproc = &cmd64x_tune_drive; |
1da177e4 LT |
540 | hwif->speedproc = &cmd64x_tune_chipset; |
541 | ||
f92d50e6 SS |
542 | hwif->drives[0].autotune = hwif->drives[1].autotune = 1; |
543 | ||
544 | if (!hwif->dma_base) | |
1da177e4 | 545 | return; |
1da177e4 | 546 | |
83a6d4ab SS |
547 | hwif->atapi_dma = 1; |
548 | hwif->mwdma_mask = 0x07; | |
18137207 BZ |
549 | hwif->ultra_mask = hwif->cds->udma_mask; |
550 | ||
2d5eaa6d BZ |
551 | /* |
552 | * UltraDMA only supported on PCI646U and PCI646U2, which | |
553 | * correspond to revisions 0x03, 0x05 and 0x07 respectively. | |
554 | * Actually, although the CMD tech support people won't | |
555 | * tell me the details, the 0x03 revision cannot support | |
556 | * UDMA correctly without hardware modifications, and even | |
557 | * then it only works with Quantum disks due to some | |
558 | * hold time assumptions in the 646U part which are fixed | |
559 | * in the 646U2. | |
560 | * | |
561 | * So we only do UltraDMA on revision 0x05 and 0x07 chipsets. | |
562 | */ | |
83a6d4ab | 563 | if (dev->device == PCI_DEVICE_ID_CMD_646 && rev < 5) |
18137207 | 564 | hwif->ultra_mask = 0x00; |
1da177e4 | 565 | |
1da177e4 | 566 | hwif->ide_dma_check = &cmd64x_config_drive_for_dma; |
83a6d4ab | 567 | |
49521f97 BZ |
568 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
569 | hwif->cbl = ata66_cmd64x(hwif); | |
1da177e4 | 570 | |
83a6d4ab | 571 | switch (dev->device) { |
66602c83 SS |
572 | case PCI_DEVICE_ID_CMD_648: |
573 | case PCI_DEVICE_ID_CMD_649: | |
574 | alt_irq_bits: | |
575 | hwif->ide_dma_end = &cmd648_ide_dma_end; | |
576 | hwif->ide_dma_test_irq = &cmd648_ide_dma_test_irq; | |
577 | break; | |
578 | case PCI_DEVICE_ID_CMD_646: | |
1da177e4 | 579 | hwif->chipset = ide_cmd646; |
83a6d4ab | 580 | if (rev == 0x01) { |
1da177e4 | 581 | hwif->ide_dma_end = &cmd646_1_ide_dma_end; |
66602c83 | 582 | break; |
83a6d4ab | 583 | } else if (rev >= 0x03) |
66602c83 SS |
584 | goto alt_irq_bits; |
585 | /* fall thru */ | |
586 | default: | |
587 | hwif->ide_dma_end = &cmd64x_ide_dma_end; | |
588 | hwif->ide_dma_test_irq = &cmd64x_ide_dma_test_irq; | |
589 | break; | |
1da177e4 LT |
590 | } |
591 | ||
1da177e4 LT |
592 | if (!noautodma) |
593 | hwif->autodma = 1; | |
83a6d4ab | 594 | hwif->drives[0].autodma = hwif->drives[1].autodma = hwif->autodma; |
1da177e4 LT |
595 | } |
596 | ||
7accbffd SS |
597 | static int __devinit init_setup_cmd64x(struct pci_dev *dev, ide_pci_device_t *d) |
598 | { | |
599 | return ide_setup_pci_device(dev, d); | |
600 | } | |
601 | ||
602 | static int __devinit init_setup_cmd646(struct pci_dev *dev, ide_pci_device_t *d) | |
603 | { | |
7accbffd SS |
604 | /* |
605 | * The original PCI0646 didn't have the primary channel enable bit, | |
606 | * it appeared starting with PCI0646U (i.e. revision ID 3). | |
607 | */ | |
44c10138 | 608 | if (dev->revision < 3) |
7accbffd SS |
609 | d->enablebits[0].reg = 0; |
610 | ||
611 | return ide_setup_pci_device(dev, d); | |
612 | } | |
613 | ||
1da177e4 LT |
614 | static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { |
615 | { /* 0 */ | |
616 | .name = "CMD643", | |
7accbffd | 617 | .init_setup = init_setup_cmd64x, |
1da177e4 LT |
618 | .init_chipset = init_chipset_cmd64x, |
619 | .init_hwif = init_hwif_cmd64x, | |
1da177e4 | 620 | .autodma = AUTODMA, |
7accbffd | 621 | .enablebits = {{0x00,0x00,0x00}, {0x51,0x08,0x08}}, |
1da177e4 | 622 | .bootable = ON_BOARD, |
4099d143 | 623 | .pio_mask = ATA_PIO5, |
18137207 | 624 | .udma_mask = 0x00, /* no udma */ |
1da177e4 LT |
625 | },{ /* 1 */ |
626 | .name = "CMD646", | |
7accbffd | 627 | .init_setup = init_setup_cmd646, |
1da177e4 LT |
628 | .init_chipset = init_chipset_cmd64x, |
629 | .init_hwif = init_hwif_cmd64x, | |
1da177e4 | 630 | .autodma = AUTODMA, |
7accbffd | 631 | .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}}, |
1da177e4 | 632 | .bootable = ON_BOARD, |
4099d143 | 633 | .pio_mask = ATA_PIO5, |
18137207 | 634 | .udma_mask = 0x07, /* udma0-2 */ |
1da177e4 LT |
635 | },{ /* 2 */ |
636 | .name = "CMD648", | |
7accbffd | 637 | .init_setup = init_setup_cmd64x, |
1da177e4 LT |
638 | .init_chipset = init_chipset_cmd64x, |
639 | .init_hwif = init_hwif_cmd64x, | |
1da177e4 | 640 | .autodma = AUTODMA, |
7accbffd | 641 | .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}}, |
1da177e4 | 642 | .bootable = ON_BOARD, |
4099d143 | 643 | .pio_mask = ATA_PIO5, |
18137207 | 644 | .udma_mask = 0x1f, /* udma0-4 */ |
1da177e4 LT |
645 | },{ /* 3 */ |
646 | .name = "CMD649", | |
7accbffd | 647 | .init_setup = init_setup_cmd64x, |
1da177e4 LT |
648 | .init_chipset = init_chipset_cmd64x, |
649 | .init_hwif = init_hwif_cmd64x, | |
1da177e4 | 650 | .autodma = AUTODMA, |
7accbffd | 651 | .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}}, |
1da177e4 | 652 | .bootable = ON_BOARD, |
4099d143 | 653 | .pio_mask = ATA_PIO5, |
18137207 | 654 | .udma_mask = 0x3f, /* udma0-5 */ |
1da177e4 LT |
655 | } |
656 | }; | |
657 | ||
7accbffd SS |
658 | /* |
659 | * We may have to modify enablebits for PCI0646, so we'd better pass | |
660 | * a local copy of the ide_pci_device_t structure down the call chain... | |
661 | */ | |
1da177e4 LT |
662 | static int __devinit cmd64x_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
663 | { | |
7accbffd SS |
664 | ide_pci_device_t d = cmd64x_chipsets[id->driver_data]; |
665 | ||
666 | return d.init_setup(dev, &d); | |
1da177e4 LT |
667 | } |
668 | ||
669 | static struct pci_device_id cmd64x_pci_tbl[] = { | |
670 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_643, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
671 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_646, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1}, | |
672 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_648, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2}, | |
673 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_649, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3}, | |
674 | { 0, }, | |
675 | }; | |
676 | MODULE_DEVICE_TABLE(pci, cmd64x_pci_tbl); | |
677 | ||
678 | static struct pci_driver driver = { | |
679 | .name = "CMD64x_IDE", | |
680 | .id_table = cmd64x_pci_tbl, | |
681 | .probe = cmd64x_init_one, | |
682 | }; | |
683 | ||
82ab1eec | 684 | static int __init cmd64x_ide_init(void) |
1da177e4 LT |
685 | { |
686 | return ide_pci_register_driver(&driver); | |
687 | } | |
688 | ||
689 | module_init(cmd64x_ide_init); | |
690 | ||
691 | MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick"); | |
692 | MODULE_DESCRIPTION("PCI driver module for CMD64x IDE"); | |
693 | MODULE_LICENSE("GPL"); |