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1da177e4 LT |
1 | /* $Id: cmd64x.c,v 1.21 2000/01/30 23:23:16 |
2 | * | |
3 | * linux/drivers/ide/pci/cmd64x.c Version 1.30 Sept 10, 2002 | |
4 | * | |
5 | * cmd64x.c: Enable interrupts at initialization time on Ultra/PCI machines. | |
6 | * Note, this driver is not used at all on other systems because | |
7 | * there the "BIOS" has done all of the following already. | |
8 | * Due to massive hardware bugs, UltraDMA is only supported | |
9 | * on the 646U2 and not on the 646U. | |
10 | * | |
11 | * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) | |
12 | * Copyright (C) 1998 David S. Miller (davem@redhat.com) | |
13 | * | |
14 | * Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org> | |
15 | */ | |
16 | ||
17 | #include <linux/config.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/types.h> | |
20 | #include <linux/pci.h> | |
21 | #include <linux/delay.h> | |
22 | #include <linux/hdreg.h> | |
23 | #include <linux/ide.h> | |
24 | #include <linux/init.h> | |
25 | ||
26 | #include <asm/io.h> | |
27 | ||
28 | #define DISPLAY_CMD64X_TIMINGS | |
29 | ||
30 | #define CMD_DEBUG 0 | |
31 | ||
32 | #if CMD_DEBUG | |
33 | #define cmdprintk(x...) printk(x) | |
34 | #else | |
35 | #define cmdprintk(x...) | |
36 | #endif | |
37 | ||
38 | /* | |
39 | * CMD64x specific registers definition. | |
40 | */ | |
41 | #define CFR 0x50 | |
42 | #define CFR_INTR_CH0 0x02 | |
43 | #define CNTRL 0x51 | |
44 | #define CNTRL_DIS_RA0 0x40 | |
45 | #define CNTRL_DIS_RA1 0x80 | |
46 | #define CNTRL_ENA_2ND 0x08 | |
47 | ||
48 | #define CMDTIM 0x52 | |
49 | #define ARTTIM0 0x53 | |
50 | #define DRWTIM0 0x54 | |
51 | #define ARTTIM1 0x55 | |
52 | #define DRWTIM1 0x56 | |
53 | #define ARTTIM23 0x57 | |
54 | #define ARTTIM23_DIS_RA2 0x04 | |
55 | #define ARTTIM23_DIS_RA3 0x08 | |
56 | #define ARTTIM23_INTR_CH1 0x10 | |
57 | #define ARTTIM2 0x57 | |
58 | #define ARTTIM3 0x57 | |
59 | #define DRWTIM23 0x58 | |
60 | #define DRWTIM2 0x58 | |
61 | #define BRST 0x59 | |
62 | #define DRWTIM3 0x5b | |
63 | ||
64 | #define BMIDECR0 0x70 | |
65 | #define MRDMODE 0x71 | |
66 | #define MRDMODE_INTR_CH0 0x04 | |
67 | #define MRDMODE_INTR_CH1 0x08 | |
68 | #define MRDMODE_BLK_CH0 0x10 | |
69 | #define MRDMODE_BLK_CH1 0x20 | |
70 | #define BMIDESR0 0x72 | |
71 | #define UDIDETCR0 0x73 | |
72 | #define DTPR0 0x74 | |
73 | #define BMIDECR1 0x78 | |
74 | #define BMIDECSR 0x79 | |
75 | #define BMIDESR1 0x7A | |
76 | #define UDIDETCR1 0x7B | |
77 | #define DTPR1 0x7C | |
78 | ||
79 | #if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_PROC_FS) | |
80 | #include <linux/stat.h> | |
81 | #include <linux/proc_fs.h> | |
82 | ||
83 | static u8 cmd64x_proc = 0; | |
84 | ||
85 | #define CMD_MAX_DEVS 5 | |
86 | ||
87 | static struct pci_dev *cmd_devs[CMD_MAX_DEVS]; | |
88 | static int n_cmd_devs; | |
89 | ||
90 | static char * print_cmd64x_get_info (char *buf, struct pci_dev *dev, int index) | |
91 | { | |
92 | char *p = buf; | |
93 | ||
94 | u8 reg53 = 0, reg54 = 0, reg55 = 0, reg56 = 0; /* primary */ | |
95 | u8 reg57 = 0, reg58 = 0, reg5b; /* secondary */ | |
96 | u8 reg72 = 0, reg73 = 0; /* primary */ | |
97 | u8 reg7a = 0, reg7b = 0; /* secondary */ | |
98 | u8 reg50 = 0, reg71 = 0; /* extra */ | |
99 | ||
100 | p += sprintf(p, "\nController: %d\n", index); | |
101 | p += sprintf(p, "CMD%x Chipset.\n", dev->device); | |
102 | (void) pci_read_config_byte(dev, CFR, ®50); | |
103 | (void) pci_read_config_byte(dev, ARTTIM0, ®53); | |
104 | (void) pci_read_config_byte(dev, DRWTIM0, ®54); | |
105 | (void) pci_read_config_byte(dev, ARTTIM1, ®55); | |
106 | (void) pci_read_config_byte(dev, DRWTIM1, ®56); | |
107 | (void) pci_read_config_byte(dev, ARTTIM2, ®57); | |
108 | (void) pci_read_config_byte(dev, DRWTIM2, ®58); | |
109 | (void) pci_read_config_byte(dev, DRWTIM3, ®5b); | |
110 | (void) pci_read_config_byte(dev, MRDMODE, ®71); | |
111 | (void) pci_read_config_byte(dev, BMIDESR0, ®72); | |
112 | (void) pci_read_config_byte(dev, UDIDETCR0, ®73); | |
113 | (void) pci_read_config_byte(dev, BMIDESR1, ®7a); | |
114 | (void) pci_read_config_byte(dev, UDIDETCR1, ®7b); | |
115 | ||
116 | p += sprintf(p, "--------------- Primary Channel " | |
117 | "---------------- Secondary Channel " | |
118 | "-------------\n"); | |
119 | p += sprintf(p, " %sabled " | |
120 | " %sabled\n", | |
121 | (reg72&0x80)?"dis":" en", | |
122 | (reg7a&0x80)?"dis":" en"); | |
123 | p += sprintf(p, "--------------- drive0 " | |
124 | "--------- drive1 -------- drive0 " | |
125 | "---------- drive1 ------\n"); | |
126 | p += sprintf(p, "DMA enabled: %s %s" | |
127 | " %s %s\n", | |
128 | (reg72&0x20)?"yes":"no ", (reg72&0x40)?"yes":"no ", | |
129 | (reg7a&0x20)?"yes":"no ", (reg7a&0x40)?"yes":"no "); | |
130 | ||
131 | p += sprintf(p, "DMA Mode: %s(%s) %s(%s)", | |
132 | (reg72&0x20)?((reg73&0x01)?"UDMA":" DMA"):" PIO", | |
133 | (reg72&0x20)?( | |
134 | ((reg73&0x30)==0x30)?(((reg73&0x35)==0x35)?"3":"0"): | |
135 | ((reg73&0x20)==0x20)?(((reg73&0x25)==0x25)?"3":"1"): | |
136 | ((reg73&0x10)==0x10)?(((reg73&0x15)==0x15)?"4":"2"): | |
137 | ((reg73&0x00)==0x00)?(((reg73&0x05)==0x05)?"5":"2"): | |
138 | "X"):"?", | |
139 | (reg72&0x40)?((reg73&0x02)?"UDMA":" DMA"):" PIO", | |
140 | (reg72&0x40)?( | |
141 | ((reg73&0xC0)==0xC0)?(((reg73&0xC5)==0xC5)?"3":"0"): | |
142 | ((reg73&0x80)==0x80)?(((reg73&0x85)==0x85)?"3":"1"): | |
143 | ((reg73&0x40)==0x40)?(((reg73&0x4A)==0x4A)?"4":"2"): | |
144 | ((reg73&0x00)==0x00)?(((reg73&0x0A)==0x0A)?"5":"2"): | |
145 | "X"):"?"); | |
146 | p += sprintf(p, " %s(%s) %s(%s)\n", | |
147 | (reg7a&0x20)?((reg7b&0x01)?"UDMA":" DMA"):" PIO", | |
148 | (reg7a&0x20)?( | |
149 | ((reg7b&0x30)==0x30)?(((reg7b&0x35)==0x35)?"3":"0"): | |
150 | ((reg7b&0x20)==0x20)?(((reg7b&0x25)==0x25)?"3":"1"): | |
151 | ((reg7b&0x10)==0x10)?(((reg7b&0x15)==0x15)?"4":"2"): | |
152 | ((reg7b&0x00)==0x00)?(((reg7b&0x05)==0x05)?"5":"2"): | |
153 | "X"):"?", | |
154 | (reg7a&0x40)?((reg7b&0x02)?"UDMA":" DMA"):" PIO", | |
155 | (reg7a&0x40)?( | |
156 | ((reg7b&0xC0)==0xC0)?(((reg7b&0xC5)==0xC5)?"3":"0"): | |
157 | ((reg7b&0x80)==0x80)?(((reg7b&0x85)==0x85)?"3":"1"): | |
158 | ((reg7b&0x40)==0x40)?(((reg7b&0x4A)==0x4A)?"4":"2"): | |
159 | ((reg7b&0x00)==0x00)?(((reg7b&0x0A)==0x0A)?"5":"2"): | |
160 | "X"):"?" ); | |
161 | p += sprintf(p, "PIO Mode: %s %s" | |
162 | " %s %s\n", | |
163 | "?", "?", "?", "?"); | |
164 | p += sprintf(p, " %s %s\n", | |
165 | (reg50 & CFR_INTR_CH0) ? "interrupting" : "polling ", | |
166 | (reg57 & ARTTIM23_INTR_CH1) ? "interrupting" : "polling"); | |
167 | p += sprintf(p, " %s %s\n", | |
168 | (reg71 & MRDMODE_INTR_CH0) ? "pending" : "clear ", | |
169 | (reg71 & MRDMODE_INTR_CH1) ? "pending" : "clear"); | |
170 | p += sprintf(p, " %s %s\n", | |
171 | (reg71 & MRDMODE_BLK_CH0) ? "blocked" : "enabled", | |
172 | (reg71 & MRDMODE_BLK_CH1) ? "blocked" : "enabled"); | |
173 | ||
174 | return (char *)p; | |
175 | } | |
176 | ||
177 | static int cmd64x_get_info (char *buffer, char **addr, off_t offset, int count) | |
178 | { | |
179 | char *p = buffer; | |
180 | int i; | |
181 | ||
182 | p += sprintf(p, "\n"); | |
183 | for (i = 0; i < n_cmd_devs; i++) { | |
184 | struct pci_dev *dev = cmd_devs[i]; | |
185 | p = print_cmd64x_get_info(p, dev, i); | |
186 | } | |
187 | return p-buffer; /* => must be less than 4k! */ | |
188 | } | |
189 | ||
190 | #endif /* defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_PROC_FS) */ | |
191 | ||
192 | /* | |
193 | * Registers and masks for easy access by drive index: | |
194 | */ | |
195 | #if 0 | |
196 | static u8 prefetch_regs[4] = {CNTRL, CNTRL, ARTTIM23, ARTTIM23}; | |
197 | static u8 prefetch_masks[4] = {CNTRL_DIS_RA0, CNTRL_DIS_RA1, ARTTIM23_DIS_RA2, ARTTIM23_DIS_RA3}; | |
198 | #endif | |
199 | ||
200 | /* | |
201 | * This routine writes the prepared setup/active/recovery counts | |
202 | * for a drive into the cmd646 chipset registers to active them. | |
203 | */ | |
204 | static void program_drive_counts (ide_drive_t *drive, int setup_count, int active_count, int recovery_count) | |
205 | { | |
206 | unsigned long flags; | |
207 | struct pci_dev *dev = HWIF(drive)->pci_dev; | |
208 | ide_drive_t *drives = HWIF(drive)->drives; | |
209 | u8 temp_b; | |
210 | static const u8 setup_counts[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0}; | |
211 | static const u8 recovery_counts[] = | |
212 | {15, 15, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 0}; | |
213 | static const u8 arttim_regs[2][2] = { | |
214 | { ARTTIM0, ARTTIM1 }, | |
215 | { ARTTIM23, ARTTIM23 } | |
216 | }; | |
217 | static const u8 drwtim_regs[2][2] = { | |
218 | { DRWTIM0, DRWTIM1 }, | |
219 | { DRWTIM2, DRWTIM3 } | |
220 | }; | |
221 | int channel = (int) HWIF(drive)->channel; | |
222 | int slave = (drives != drive); /* Is this really the best way to determine this?? */ | |
223 | ||
224 | cmdprintk("program_drive_count parameters = s(%d),a(%d),r(%d),p(%d)\n", | |
225 | setup_count, active_count, recovery_count, drive->present); | |
226 | /* | |
227 | * Set up address setup count registers. | |
228 | * Primary interface has individual count/timing registers for | |
229 | * each drive. Secondary interface has one common set of registers, | |
230 | * for address setup so we merge these timings, using the slowest | |
231 | * value. | |
232 | */ | |
233 | if (channel) { | |
234 | drive->drive_data = setup_count; | |
235 | setup_count = max(drives[0].drive_data, | |
236 | drives[1].drive_data); | |
237 | cmdprintk("Secondary interface, setup_count = %d\n", | |
238 | setup_count); | |
239 | } | |
240 | ||
241 | /* | |
242 | * Convert values to internal chipset representation | |
243 | */ | |
244 | setup_count = (setup_count > 5) ? 0xc0 : (int) setup_counts[setup_count]; | |
245 | active_count &= 0xf; /* Remember, max value is 16 */ | |
246 | recovery_count = (int) recovery_counts[recovery_count]; | |
247 | ||
248 | cmdprintk("Final values = %d,%d,%d\n", | |
249 | setup_count, active_count, recovery_count); | |
250 | ||
251 | /* | |
252 | * Now that everything is ready, program the new timings | |
253 | */ | |
254 | local_irq_save(flags); | |
255 | /* | |
256 | * Program the address_setup clocks into ARTTIM reg, | |
257 | * and then the active/recovery counts into the DRWTIM reg | |
258 | */ | |
259 | (void) pci_read_config_byte(dev, arttim_regs[channel][slave], &temp_b); | |
260 | (void) pci_write_config_byte(dev, arttim_regs[channel][slave], | |
261 | ((u8) setup_count) | (temp_b & 0x3f)); | |
262 | (void) pci_write_config_byte(dev, drwtim_regs[channel][slave], | |
263 | (u8) ((active_count << 4) | recovery_count)); | |
264 | cmdprintk ("Write %x to %x\n", | |
265 | ((u8) setup_count) | (temp_b & 0x3f), | |
266 | arttim_regs[channel][slave]); | |
267 | cmdprintk ("Write %x to %x\n", | |
268 | (u8) ((active_count << 4) | recovery_count), | |
269 | drwtim_regs[channel][slave]); | |
270 | local_irq_restore(flags); | |
271 | } | |
272 | ||
273 | /* | |
274 | * Attempts to set the interface PIO mode. | |
275 | * The preferred method of selecting PIO modes (e.g. mode 4) is | |
276 | * "echo 'piomode:4' > /proc/ide/hdx/settings". Special cases are | |
277 | * 8: prefetch off, 9: prefetch on, 255: auto-select best mode. | |
278 | * Called with 255 at boot time. | |
279 | */ | |
280 | ||
281 | static void cmd64x_tuneproc (ide_drive_t *drive, u8 mode_wanted) | |
282 | { | |
283 | int setup_time, active_time, recovery_time; | |
284 | int clock_time, pio_mode, cycle_time; | |
285 | u8 recovery_count2, cycle_count; | |
286 | int setup_count, active_count, recovery_count; | |
287 | int bus_speed = system_bus_clock(); | |
288 | /*byte b;*/ | |
289 | ide_pio_data_t d; | |
290 | ||
291 | switch (mode_wanted) { | |
292 | case 8: /* set prefetch off */ | |
293 | case 9: /* set prefetch on */ | |
294 | mode_wanted &= 1; | |
295 | /*set_prefetch_mode(index, mode_wanted);*/ | |
296 | cmdprintk("%s: %sabled cmd640 prefetch\n", | |
297 | drive->name, mode_wanted ? "en" : "dis"); | |
298 | return; | |
299 | } | |
300 | ||
301 | mode_wanted = ide_get_best_pio_mode (drive, mode_wanted, 5, &d); | |
302 | pio_mode = d.pio_mode; | |
303 | cycle_time = d.cycle_time; | |
304 | ||
305 | /* | |
306 | * I copied all this complicated stuff from cmd640.c and made a few | |
307 | * minor changes. For now I am just going to pray that it is correct. | |
308 | */ | |
309 | if (pio_mode > 5) | |
310 | pio_mode = 5; | |
311 | setup_time = ide_pio_timings[pio_mode].setup_time; | |
312 | active_time = ide_pio_timings[pio_mode].active_time; | |
313 | recovery_time = cycle_time - (setup_time + active_time); | |
314 | clock_time = 1000 / bus_speed; | |
315 | cycle_count = (cycle_time + clock_time - 1) / clock_time; | |
316 | ||
317 | setup_count = (setup_time + clock_time - 1) / clock_time; | |
318 | ||
319 | active_count = (active_time + clock_time - 1) / clock_time; | |
320 | ||
321 | recovery_count = (recovery_time + clock_time - 1) / clock_time; | |
322 | recovery_count2 = cycle_count - (setup_count + active_count); | |
323 | if (recovery_count2 > recovery_count) | |
324 | recovery_count = recovery_count2; | |
325 | if (recovery_count > 16) { | |
326 | active_count += recovery_count - 16; | |
327 | recovery_count = 16; | |
328 | } | |
329 | if (active_count > 16) | |
330 | active_count = 16; /* maximum allowed by cmd646 */ | |
331 | ||
332 | /* | |
333 | * In a perfect world, we might set the drive pio mode here | |
334 | * (using WIN_SETFEATURE) before continuing. | |
335 | * | |
336 | * But we do not, because: | |
337 | * 1) this is the wrong place to do it | |
338 | * (proper is do_special() in ide.c) | |
339 | * 2) in practice this is rarely, if ever, necessary | |
340 | */ | |
341 | program_drive_counts (drive, setup_count, active_count, recovery_count); | |
342 | ||
343 | cmdprintk("%s: selected cmd646 PIO mode%d : %d (%dns)%s, " | |
344 | "clocks=%d/%d/%d\n", | |
345 | drive->name, pio_mode, mode_wanted, cycle_time, | |
346 | d.overridden ? " (overriding vendor mode)" : "", | |
347 | setup_count, active_count, recovery_count); | |
348 | } | |
349 | ||
350 | static u8 cmd64x_ratemask (ide_drive_t *drive) | |
351 | { | |
352 | struct pci_dev *dev = HWIF(drive)->pci_dev; | |
353 | u8 mode = 0; | |
354 | ||
355 | switch(dev->device) { | |
356 | case PCI_DEVICE_ID_CMD_649: | |
357 | mode = 3; | |
358 | break; | |
359 | case PCI_DEVICE_ID_CMD_648: | |
360 | mode = 2; | |
361 | break; | |
362 | case PCI_DEVICE_ID_CMD_643: | |
363 | return 0; | |
364 | ||
365 | case PCI_DEVICE_ID_CMD_646: | |
366 | { | |
367 | unsigned int class_rev = 0; | |
368 | pci_read_config_dword(dev, | |
369 | PCI_CLASS_REVISION, &class_rev); | |
370 | class_rev &= 0xff; | |
371 | /* | |
372 | * UltraDMA only supported on PCI646U and PCI646U2, which | |
373 | * correspond to revisions 0x03, 0x05 and 0x07 respectively. | |
374 | * Actually, although the CMD tech support people won't | |
375 | * tell me the details, the 0x03 revision cannot support | |
376 | * UDMA correctly without hardware modifications, and even | |
377 | * then it only works with Quantum disks due to some | |
378 | * hold time assumptions in the 646U part which are fixed | |
379 | * in the 646U2. | |
380 | * | |
381 | * So we only do UltraDMA on revision 0x05 and 0x07 chipsets. | |
382 | */ | |
383 | switch(class_rev) { | |
384 | case 0x07: | |
385 | case 0x05: | |
386 | return 1; | |
387 | case 0x03: | |
388 | case 0x01: | |
389 | default: | |
390 | return 0; | |
391 | } | |
392 | } | |
393 | } | |
394 | if (!eighty_ninty_three(drive)) | |
395 | mode = min(mode, (u8)1); | |
396 | return mode; | |
397 | } | |
398 | ||
399 | static void config_cmd64x_chipset_for_pio (ide_drive_t *drive, u8 set_speed) | |
400 | { | |
401 | u8 speed = 0x00; | |
402 | u8 set_pio = ide_get_best_pio_mode(drive, 4, 5, NULL); | |
403 | ||
404 | cmd64x_tuneproc(drive, set_pio); | |
405 | speed = XFER_PIO_0 + set_pio; | |
406 | if (set_speed) | |
407 | (void) ide_config_drive_speed(drive, speed); | |
408 | } | |
409 | ||
410 | static void config_chipset_for_pio (ide_drive_t *drive, u8 set_speed) | |
411 | { | |
412 | config_cmd64x_chipset_for_pio(drive, set_speed); | |
413 | } | |
414 | ||
415 | static int cmd64x_tune_chipset (ide_drive_t *drive, u8 xferspeed) | |
416 | { | |
417 | ide_hwif_t *hwif = HWIF(drive); | |
418 | struct pci_dev *dev = hwif->pci_dev; | |
419 | ||
420 | u8 unit = (drive->select.b.unit & 0x01); | |
421 | u8 regU = 0, pciU = (hwif->channel) ? UDIDETCR1 : UDIDETCR0; | |
422 | u8 regD = 0, pciD = (hwif->channel) ? BMIDESR1 : BMIDESR0; | |
423 | ||
424 | u8 speed = ide_rate_filter(cmd64x_ratemask(drive), xferspeed); | |
425 | ||
426 | if (speed > XFER_PIO_4) { | |
427 | (void) pci_read_config_byte(dev, pciD, ®D); | |
428 | (void) pci_read_config_byte(dev, pciU, ®U); | |
429 | regD &= ~(unit ? 0x40 : 0x20); | |
430 | regU &= ~(unit ? 0xCA : 0x35); | |
431 | (void) pci_write_config_byte(dev, pciD, regD); | |
432 | (void) pci_write_config_byte(dev, pciU, regU); | |
433 | (void) pci_read_config_byte(dev, pciD, ®D); | |
434 | (void) pci_read_config_byte(dev, pciU, ®U); | |
435 | } | |
436 | ||
437 | switch(speed) { | |
438 | case XFER_UDMA_5: regU |= (unit ? 0x0A : 0x05); break; | |
439 | case XFER_UDMA_4: regU |= (unit ? 0x4A : 0x15); break; | |
440 | case XFER_UDMA_3: regU |= (unit ? 0x8A : 0x25); break; | |
441 | case XFER_UDMA_2: regU |= (unit ? 0x42 : 0x11); break; | |
442 | case XFER_UDMA_1: regU |= (unit ? 0x82 : 0x21); break; | |
443 | case XFER_UDMA_0: regU |= (unit ? 0xC2 : 0x31); break; | |
444 | case XFER_MW_DMA_2: regD |= (unit ? 0x40 : 0x10); break; | |
445 | case XFER_MW_DMA_1: regD |= (unit ? 0x80 : 0x20); break; | |
446 | case XFER_MW_DMA_0: regD |= (unit ? 0xC0 : 0x30); break; | |
447 | case XFER_SW_DMA_2: regD |= (unit ? 0x40 : 0x10); break; | |
448 | case XFER_SW_DMA_1: regD |= (unit ? 0x80 : 0x20); break; | |
449 | case XFER_SW_DMA_0: regD |= (unit ? 0xC0 : 0x30); break; | |
450 | case XFER_PIO_4: cmd64x_tuneproc(drive, 4); break; | |
451 | case XFER_PIO_3: cmd64x_tuneproc(drive, 3); break; | |
452 | case XFER_PIO_2: cmd64x_tuneproc(drive, 2); break; | |
453 | case XFER_PIO_1: cmd64x_tuneproc(drive, 1); break; | |
454 | case XFER_PIO_0: cmd64x_tuneproc(drive, 0); break; | |
455 | ||
456 | default: | |
457 | return 1; | |
458 | } | |
459 | ||
460 | if (speed > XFER_PIO_4) { | |
461 | (void) pci_write_config_byte(dev, pciU, regU); | |
462 | regD |= (unit ? 0x40 : 0x20); | |
463 | (void) pci_write_config_byte(dev, pciD, regD); | |
464 | } | |
465 | ||
466 | return (ide_config_drive_speed(drive, speed)); | |
467 | } | |
468 | ||
469 | static int config_chipset_for_dma (ide_drive_t *drive) | |
470 | { | |
471 | u8 speed = ide_dma_speed(drive, cmd64x_ratemask(drive)); | |
472 | ||
473 | config_chipset_for_pio(drive, !speed); | |
474 | ||
475 | if (!speed) | |
476 | return 0; | |
477 | ||
478 | if(ide_set_xfer_rate(drive, speed)) | |
479 | return 0; | |
480 | ||
481 | if (!drive->init_speed) | |
482 | drive->init_speed = speed; | |
483 | ||
484 | return ide_dma_enable(drive); | |
485 | } | |
486 | ||
487 | static int cmd64x_config_drive_for_dma (ide_drive_t *drive) | |
488 | { | |
489 | ide_hwif_t *hwif = HWIF(drive); | |
490 | struct hd_driveid *id = drive->id; | |
491 | ||
492 | if ((id != NULL) && ((id->capability & 1) != 0) && drive->autodma) { | |
493 | ||
494 | if (ide_use_dma(drive)) { | |
495 | if (config_chipset_for_dma(drive)) | |
496 | return hwif->ide_dma_on(drive); | |
497 | } | |
498 | ||
499 | goto fast_ata_pio; | |
500 | ||
501 | } else if ((id->capability & 8) || (id->field_valid & 2)) { | |
502 | fast_ata_pio: | |
503 | config_chipset_for_pio(drive, 1); | |
504 | return hwif->ide_dma_off_quietly(drive); | |
505 | } | |
506 | /* IORDY not supported */ | |
507 | return 0; | |
508 | } | |
509 | ||
510 | static int cmd64x_alt_dma_status (struct pci_dev *dev) | |
511 | { | |
512 | switch(dev->device) { | |
513 | case PCI_DEVICE_ID_CMD_648: | |
514 | case PCI_DEVICE_ID_CMD_649: | |
515 | return 1; | |
516 | default: | |
517 | break; | |
518 | } | |
519 | return 0; | |
520 | } | |
521 | ||
522 | static int cmd64x_ide_dma_end (ide_drive_t *drive) | |
523 | { | |
524 | u8 dma_stat = 0, dma_cmd = 0; | |
525 | ide_hwif_t *hwif = HWIF(drive); | |
526 | struct pci_dev *dev = hwif->pci_dev; | |
527 | ||
528 | drive->waiting_for_dma = 0; | |
529 | /* read DMA command state */ | |
530 | dma_cmd = hwif->INB(hwif->dma_command); | |
531 | /* stop DMA */ | |
532 | hwif->OUTB((dma_cmd & ~1), hwif->dma_command); | |
533 | /* get DMA status */ | |
534 | dma_stat = hwif->INB(hwif->dma_status); | |
535 | /* clear the INTR & ERROR bits */ | |
536 | hwif->OUTB(dma_stat|6, hwif->dma_status); | |
537 | if (cmd64x_alt_dma_status(dev)) { | |
538 | u8 dma_intr = 0; | |
539 | u8 dma_mask = (hwif->channel) ? ARTTIM23_INTR_CH1 : | |
540 | CFR_INTR_CH0; | |
541 | u8 dma_reg = (hwif->channel) ? ARTTIM2 : CFR; | |
542 | (void) pci_read_config_byte(dev, dma_reg, &dma_intr); | |
543 | /* clear the INTR bit */ | |
544 | (void) pci_write_config_byte(dev, dma_reg, dma_intr|dma_mask); | |
545 | } | |
546 | /* purge DMA mappings */ | |
547 | ide_destroy_dmatable(drive); | |
548 | /* verify good DMA status */ | |
549 | return (dma_stat & 7) != 4; | |
550 | } | |
551 | ||
552 | static int cmd64x_ide_dma_test_irq (ide_drive_t *drive) | |
553 | { | |
554 | ide_hwif_t *hwif = HWIF(drive); | |
555 | struct pci_dev *dev = hwif->pci_dev; | |
556 | u8 dma_alt_stat = 0, mask = (hwif->channel) ? MRDMODE_INTR_CH1 : | |
557 | MRDMODE_INTR_CH0; | |
558 | u8 dma_stat = hwif->INB(hwif->dma_status); | |
559 | ||
560 | (void) pci_read_config_byte(dev, MRDMODE, &dma_alt_stat); | |
561 | #ifdef DEBUG | |
562 | printk("%s: dma_stat: 0x%02x dma_alt_stat: " | |
563 | "0x%02x mask: 0x%02x\n", drive->name, | |
564 | dma_stat, dma_alt_stat, mask); | |
565 | #endif | |
566 | if (!(dma_alt_stat & mask)) | |
567 | return 0; | |
568 | ||
569 | /* return 1 if INTR asserted */ | |
570 | if ((dma_stat & 4) == 4) | |
571 | return 1; | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | /* | |
577 | * ASUS P55T2P4D with CMD646 chipset revision 0x01 requires the old | |
578 | * event order for DMA transfers. | |
579 | */ | |
580 | ||
581 | static int cmd646_1_ide_dma_end (ide_drive_t *drive) | |
582 | { | |
583 | ide_hwif_t *hwif = HWIF(drive); | |
584 | u8 dma_stat = 0, dma_cmd = 0; | |
585 | ||
586 | drive->waiting_for_dma = 0; | |
587 | /* get DMA status */ | |
588 | dma_stat = hwif->INB(hwif->dma_status); | |
589 | /* read DMA command state */ | |
590 | dma_cmd = hwif->INB(hwif->dma_command); | |
591 | /* stop DMA */ | |
592 | hwif->OUTB((dma_cmd & ~1), hwif->dma_command); | |
593 | /* clear the INTR & ERROR bits */ | |
594 | hwif->OUTB(dma_stat|6, hwif->dma_status); | |
595 | /* and free any DMA resources */ | |
596 | ide_destroy_dmatable(drive); | |
597 | /* verify good DMA status */ | |
598 | return (dma_stat & 7) != 4; | |
599 | } | |
600 | ||
601 | static unsigned int __devinit init_chipset_cmd64x(struct pci_dev *dev, const char *name) | |
602 | { | |
603 | u32 class_rev = 0; | |
604 | u8 mrdmode = 0; | |
605 | ||
606 | pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev); | |
607 | class_rev &= 0xff; | |
608 | ||
609 | #ifdef __i386__ | |
610 | if (dev->resource[PCI_ROM_RESOURCE].start) { | |
611 | pci_write_config_byte(dev, PCI_ROM_ADDRESS, dev->resource[PCI_ROM_RESOURCE].start | PCI_ROM_ADDRESS_ENABLE); | |
612 | printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n", name, dev->resource[PCI_ROM_RESOURCE].start); | |
613 | } | |
614 | #endif | |
615 | ||
616 | switch(dev->device) { | |
617 | case PCI_DEVICE_ID_CMD_643: | |
618 | break; | |
619 | case PCI_DEVICE_ID_CMD_646: | |
620 | printk(KERN_INFO "%s: chipset revision 0x%02X, ", name, class_rev); | |
621 | switch(class_rev) { | |
622 | case 0x07: | |
623 | case 0x05: | |
624 | printk("UltraDMA Capable"); | |
625 | break; | |
626 | case 0x03: | |
627 | printk("MultiWord DMA Force Limited"); | |
628 | break; | |
629 | case 0x01: | |
630 | default: | |
631 | printk("MultiWord DMA Limited, IRQ workaround enabled"); | |
632 | break; | |
633 | } | |
634 | printk("\n"); | |
635 | break; | |
636 | case PCI_DEVICE_ID_CMD_648: | |
637 | case PCI_DEVICE_ID_CMD_649: | |
638 | break; | |
639 | default: | |
640 | break; | |
641 | } | |
642 | ||
643 | /* Set a good latency timer and cache line size value. */ | |
644 | (void) pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64); | |
645 | /* FIXME: pci_set_master() to ensure a good latency timer value */ | |
646 | ||
647 | /* Setup interrupts. */ | |
648 | (void) pci_read_config_byte(dev, MRDMODE, &mrdmode); | |
649 | mrdmode &= ~(0x30); | |
650 | (void) pci_write_config_byte(dev, MRDMODE, mrdmode); | |
651 | ||
652 | /* Use MEMORY READ LINE for reads. | |
653 | * NOTE: Although not mentioned in the PCI0646U specs, | |
654 | * these bits are write only and won't be read | |
655 | * back as set or not. The PCI0646U2 specs clarify | |
656 | * this point. | |
657 | */ | |
658 | (void) pci_write_config_byte(dev, MRDMODE, mrdmode | 0x02); | |
659 | ||
660 | /* Set reasonable active/recovery/address-setup values. */ | |
661 | (void) pci_write_config_byte(dev, ARTTIM0, 0x40); | |
662 | (void) pci_write_config_byte(dev, DRWTIM0, 0x3f); | |
663 | (void) pci_write_config_byte(dev, ARTTIM1, 0x40); | |
664 | (void) pci_write_config_byte(dev, DRWTIM1, 0x3f); | |
665 | #ifdef __i386__ | |
666 | (void) pci_write_config_byte(dev, ARTTIM23, 0x1c); | |
667 | #else | |
668 | (void) pci_write_config_byte(dev, ARTTIM23, 0x5c); | |
669 | #endif | |
670 | (void) pci_write_config_byte(dev, DRWTIM23, 0x3f); | |
671 | (void) pci_write_config_byte(dev, DRWTIM3, 0x3f); | |
672 | #ifdef CONFIG_PPC | |
673 | (void) pci_write_config_byte(dev, UDIDETCR0, 0xf0); | |
674 | #endif /* CONFIG_PPC */ | |
675 | ||
676 | #if defined(DISPLAY_CMD64X_TIMINGS) && defined(CONFIG_PROC_FS) | |
677 | ||
678 | cmd_devs[n_cmd_devs++] = dev; | |
679 | ||
680 | if (!cmd64x_proc) { | |
681 | cmd64x_proc = 1; | |
682 | ide_pci_create_host_proc("cmd64x", cmd64x_get_info); | |
683 | } | |
684 | #endif /* DISPLAY_CMD64X_TIMINGS && CONFIG_PROC_FS */ | |
685 | ||
686 | return 0; | |
687 | } | |
688 | ||
689 | static unsigned int __devinit ata66_cmd64x(ide_hwif_t *hwif) | |
690 | { | |
691 | u8 ata66 = 0, mask = (hwif->channel) ? 0x02 : 0x01; | |
692 | ||
693 | switch(hwif->pci_dev->device) { | |
694 | case PCI_DEVICE_ID_CMD_643: | |
695 | case PCI_DEVICE_ID_CMD_646: | |
696 | return ata66; | |
697 | default: | |
698 | break; | |
699 | } | |
700 | pci_read_config_byte(hwif->pci_dev, BMIDECSR, &ata66); | |
701 | return (ata66 & mask) ? 1 : 0; | |
702 | } | |
703 | ||
704 | static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif) | |
705 | { | |
706 | struct pci_dev *dev = hwif->pci_dev; | |
707 | unsigned int class_rev; | |
708 | ||
709 | hwif->autodma = 0; | |
710 | pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev); | |
711 | class_rev &= 0xff; | |
712 | ||
713 | hwif->tuneproc = &cmd64x_tuneproc; | |
714 | hwif->speedproc = &cmd64x_tune_chipset; | |
715 | ||
716 | if (!hwif->dma_base) { | |
717 | hwif->drives[0].autotune = 1; | |
718 | hwif->drives[1].autotune = 1; | |
719 | return; | |
720 | } | |
721 | ||
722 | hwif->atapi_dma = 1; | |
723 | ||
724 | hwif->ultra_mask = 0x3f; | |
725 | hwif->mwdma_mask = 0x07; | |
726 | hwif->swdma_mask = 0x07; | |
727 | ||
728 | if (dev->device == PCI_DEVICE_ID_CMD_643) | |
729 | hwif->ultra_mask = 0x80; | |
730 | if (dev->device == PCI_DEVICE_ID_CMD_646) | |
731 | hwif->ultra_mask = (class_rev > 0x04) ? 0x07 : 0x80; | |
732 | if (dev->device == PCI_DEVICE_ID_CMD_648) | |
733 | hwif->ultra_mask = 0x1f; | |
734 | ||
735 | hwif->ide_dma_check = &cmd64x_config_drive_for_dma; | |
736 | if (!(hwif->udma_four)) | |
737 | hwif->udma_four = ata66_cmd64x(hwif); | |
738 | ||
739 | if (dev->device == PCI_DEVICE_ID_CMD_646) { | |
740 | hwif->chipset = ide_cmd646; | |
741 | if (class_rev == 0x01) { | |
742 | hwif->ide_dma_end = &cmd646_1_ide_dma_end; | |
743 | } else { | |
744 | hwif->ide_dma_end = &cmd64x_ide_dma_end; | |
745 | hwif->ide_dma_test_irq = &cmd64x_ide_dma_test_irq; | |
746 | } | |
747 | } else { | |
748 | hwif->ide_dma_end = &cmd64x_ide_dma_end; | |
749 | hwif->ide_dma_test_irq = &cmd64x_ide_dma_test_irq; | |
750 | } | |
751 | ||
752 | ||
753 | if (!noautodma) | |
754 | hwif->autodma = 1; | |
755 | hwif->drives[0].autodma = hwif->autodma; | |
756 | hwif->drives[1].autodma = hwif->autodma; | |
757 | } | |
758 | ||
759 | static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { | |
760 | { /* 0 */ | |
761 | .name = "CMD643", | |
762 | .init_chipset = init_chipset_cmd64x, | |
763 | .init_hwif = init_hwif_cmd64x, | |
764 | .channels = 2, | |
765 | .autodma = AUTODMA, | |
766 | .bootable = ON_BOARD, | |
767 | },{ /* 1 */ | |
768 | .name = "CMD646", | |
769 | .init_chipset = init_chipset_cmd64x, | |
770 | .init_hwif = init_hwif_cmd64x, | |
771 | .channels = 2, | |
772 | .autodma = AUTODMA, | |
773 | .enablebits = {{0x00,0x00,0x00}, {0x51,0x80,0x80}}, | |
774 | .bootable = ON_BOARD, | |
775 | },{ /* 2 */ | |
776 | .name = "CMD648", | |
777 | .init_chipset = init_chipset_cmd64x, | |
778 | .init_hwif = init_hwif_cmd64x, | |
779 | .channels = 2, | |
780 | .autodma = AUTODMA, | |
781 | .bootable = ON_BOARD, | |
782 | },{ /* 3 */ | |
783 | .name = "CMD649", | |
784 | .init_chipset = init_chipset_cmd64x, | |
785 | .init_hwif = init_hwif_cmd64x, | |
786 | .channels = 2, | |
787 | .autodma = AUTODMA, | |
788 | .bootable = ON_BOARD, | |
789 | } | |
790 | }; | |
791 | ||
792 | static int __devinit cmd64x_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
793 | { | |
794 | return ide_setup_pci_device(dev, &cmd64x_chipsets[id->driver_data]); | |
795 | } | |
796 | ||
797 | static struct pci_device_id cmd64x_pci_tbl[] = { | |
798 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_643, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, | |
799 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_646, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1}, | |
800 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_648, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2}, | |
801 | { PCI_VENDOR_ID_CMD, PCI_DEVICE_ID_CMD_649, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3}, | |
802 | { 0, }, | |
803 | }; | |
804 | MODULE_DEVICE_TABLE(pci, cmd64x_pci_tbl); | |
805 | ||
806 | static struct pci_driver driver = { | |
807 | .name = "CMD64x_IDE", | |
808 | .id_table = cmd64x_pci_tbl, | |
809 | .probe = cmd64x_init_one, | |
810 | }; | |
811 | ||
812 | static int cmd64x_ide_init(void) | |
813 | { | |
814 | return ide_pci_register_driver(&driver); | |
815 | } | |
816 | ||
817 | module_init(cmd64x_ide_init); | |
818 | ||
819 | MODULE_AUTHOR("Eddie Dost, David Miller, Andre Hedrick"); | |
820 | MODULE_DESCRIPTION("PCI driver module for CMD64x IDE"); | |
821 | MODULE_LICENSE("GPL"); |