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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2003 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License | |
6 | * as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public | |
13 | * License along with this program; if not, write the Free Software | |
14 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
15 | * | |
16 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
17 | * Mountain View, CA 94043, or: | |
18 | * | |
19 | * http://www.sgi.com | |
20 | * | |
21 | * For further information regarding this notice, see: | |
22 | * | |
23 | * http://oss.sgi.com/projects/GenInfo/NoticeExplan | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/pci.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/hdreg.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/timer.h> | |
34 | #include <linux/mm.h> | |
35 | #include <linux/ioport.h> | |
36 | #include <linux/blkdev.h> | |
37 | #include <linux/ioc4_common.h> | |
38 | #include <asm/io.h> | |
39 | ||
40 | #include <linux/ide.h> | |
41 | ||
42 | /* IOC4 Specific Definitions */ | |
43 | #define IOC4_CMD_OFFSET 0x100 | |
44 | #define IOC4_CTRL_OFFSET 0x120 | |
45 | #define IOC4_DMA_OFFSET 0x140 | |
46 | #define IOC4_INTR_OFFSET 0x0 | |
47 | ||
48 | #define IOC4_TIMING 0x00 | |
49 | #define IOC4_DMA_PTR_L 0x01 | |
50 | #define IOC4_DMA_PTR_H 0x02 | |
51 | #define IOC4_DMA_ADDR_L 0x03 | |
52 | #define IOC4_DMA_ADDR_H 0x04 | |
53 | #define IOC4_BC_DEV 0x05 | |
54 | #define IOC4_BC_MEM 0x06 | |
55 | #define IOC4_DMA_CTRL 0x07 | |
56 | #define IOC4_DMA_END_ADDR 0x08 | |
57 | ||
58 | /* Bits in the IOC4 Control/Status Register */ | |
59 | #define IOC4_S_DMA_START 0x01 | |
60 | #define IOC4_S_DMA_STOP 0x02 | |
61 | #define IOC4_S_DMA_DIR 0x04 | |
62 | #define IOC4_S_DMA_ACTIVE 0x08 | |
63 | #define IOC4_S_DMA_ERROR 0x10 | |
64 | #define IOC4_ATA_MEMERR 0x02 | |
65 | ||
66 | /* Read/Write Directions */ | |
67 | #define IOC4_DMA_WRITE 0x04 | |
68 | #define IOC4_DMA_READ 0x00 | |
69 | ||
70 | /* Interrupt Register Offsets */ | |
71 | #define IOC4_INTR_REG 0x03 | |
72 | #define IOC4_INTR_SET 0x05 | |
73 | #define IOC4_INTR_CLEAR 0x07 | |
74 | ||
75 | #define IOC4_IDE_CACHELINE_SIZE 128 | |
76 | #define IOC4_CMD_CTL_BLK_SIZE 0x20 | |
77 | #define IOC4_SUPPORTED_FIRMWARE_REV 46 | |
78 | ||
79 | typedef struct { | |
80 | u32 timing_reg0; | |
81 | u32 timing_reg1; | |
82 | u32 low_mem_ptr; | |
83 | u32 high_mem_ptr; | |
84 | u32 low_mem_addr; | |
85 | u32 high_mem_addr; | |
86 | u32 dev_byte_count; | |
87 | u32 mem_byte_count; | |
88 | u32 status; | |
89 | } ioc4_dma_regs_t; | |
90 | ||
91 | /* Each Physical Region Descriptor Entry size is 16 bytes (2 * 64 bits) */ | |
92 | /* IOC4 has only 1 IDE channel */ | |
93 | #define IOC4_PRD_BYTES 16 | |
94 | #define IOC4_PRD_ENTRIES (PAGE_SIZE /(4*IOC4_PRD_BYTES)) | |
95 | ||
96 | ||
97 | static void | |
98 | sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port, | |
99 | unsigned long ctrl_port, unsigned long irq_port) | |
100 | { | |
101 | unsigned long reg = data_port; | |
102 | int i; | |
103 | ||
104 | /* Registers are word (32 bit) aligned */ | |
105 | for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) | |
106 | hw->io_ports[i] = reg + i * 4; | |
107 | ||
108 | if (ctrl_port) | |
109 | hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port; | |
110 | ||
111 | if (irq_port) | |
112 | hw->io_ports[IDE_IRQ_OFFSET] = irq_port; | |
113 | } | |
114 | ||
115 | static void | |
116 | sgiioc4_maskproc(ide_drive_t * drive, int mask) | |
117 | { | |
118 | ide_hwif_t *hwif = HWIF(drive); | |
119 | hwif->OUTB(mask ? (drive->ctl | 2) : (drive->ctl & ~2), | |
120 | IDE_CONTROL_REG); | |
121 | } | |
122 | ||
123 | ||
124 | static int | |
125 | sgiioc4_checkirq(ide_hwif_t * hwif) | |
126 | { | |
127 | u8 intr_reg = | |
128 | hwif->INL(hwif->io_ports[IDE_IRQ_OFFSET] + IOC4_INTR_REG * 4); | |
129 | ||
130 | if (intr_reg & 0x03) | |
131 | return 1; | |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | ||
137 | static int | |
138 | sgiioc4_clearirq(ide_drive_t * drive) | |
139 | { | |
140 | u32 intr_reg; | |
141 | ide_hwif_t *hwif = HWIF(drive); | |
142 | unsigned long other_ir = | |
143 | hwif->io_ports[IDE_IRQ_OFFSET] + (IOC4_INTR_REG << 2); | |
144 | ||
145 | /* Code to check for PCI error conditions */ | |
146 | intr_reg = hwif->INL(other_ir); | |
147 | if (intr_reg & 0x03) { /* Valid IOC4-IDE interrupt */ | |
148 | /* | |
149 | * Using hwif->INB to read the IDE_STATUS_REG has a side effect | |
150 | * of clearing the interrupt. The first read should clear it | |
151 | * if it is set. The second read should return a "clear" status | |
152 | * if it got cleared. If not, then spin for a bit trying to | |
153 | * clear it. | |
154 | */ | |
155 | u8 stat = hwif->INB(IDE_STATUS_REG); | |
156 | int count = 0; | |
157 | stat = hwif->INB(IDE_STATUS_REG); | |
158 | while ((stat & 0x80) && (count++ < 100)) { | |
159 | udelay(1); | |
160 | stat = hwif->INB(IDE_STATUS_REG); | |
161 | } | |
162 | ||
163 | if (intr_reg & 0x02) { | |
164 | /* Error when transferring DMA data on PCI bus */ | |
165 | u32 pci_err_addr_low, pci_err_addr_high, | |
166 | pci_stat_cmd_reg; | |
167 | ||
168 | pci_err_addr_low = | |
169 | hwif->INL(hwif->io_ports[IDE_IRQ_OFFSET]); | |
170 | pci_err_addr_high = | |
171 | hwif->INL(hwif->io_ports[IDE_IRQ_OFFSET] + 4); | |
172 | pci_read_config_dword(hwif->pci_dev, PCI_COMMAND, | |
173 | &pci_stat_cmd_reg); | |
174 | printk(KERN_ERR | |
175 | "%s(%s) : PCI Bus Error when doing DMA:" | |
176 | " status-cmd reg is 0x%x\n", | |
177 | __FUNCTION__, drive->name, pci_stat_cmd_reg); | |
178 | printk(KERN_ERR | |
179 | "%s(%s) : PCI Error Address is 0x%x%x\n", | |
180 | __FUNCTION__, drive->name, | |
181 | pci_err_addr_high, pci_err_addr_low); | |
182 | /* Clear the PCI Error indicator */ | |
183 | pci_write_config_dword(hwif->pci_dev, PCI_COMMAND, | |
184 | 0x00000146); | |
185 | } | |
186 | ||
187 | /* Clear the Interrupt, Error bits on the IOC4 */ | |
188 | hwif->OUTL(0x03, other_ir); | |
189 | ||
190 | intr_reg = hwif->INL(other_ir); | |
191 | } | |
192 | ||
193 | return intr_reg & 3; | |
194 | } | |
195 | ||
196 | static void sgiioc4_ide_dma_start(ide_drive_t * drive) | |
197 | { | |
198 | ide_hwif_t *hwif = HWIF(drive); | |
199 | unsigned int reg = hwif->INL(hwif->dma_base + IOC4_DMA_CTRL * 4); | |
200 | unsigned int temp_reg = reg | IOC4_S_DMA_START; | |
201 | ||
202 | hwif->OUTL(temp_reg, hwif->dma_base + IOC4_DMA_CTRL * 4); | |
203 | } | |
204 | ||
205 | static u32 | |
206 | sgiioc4_ide_dma_stop(ide_hwif_t *hwif, u64 dma_base) | |
207 | { | |
208 | u32 ioc4_dma; | |
209 | int count; | |
210 | ||
211 | count = 0; | |
212 | ioc4_dma = hwif->INL(dma_base + IOC4_DMA_CTRL * 4); | |
213 | while ((ioc4_dma & IOC4_S_DMA_STOP) && (count++ < 200)) { | |
214 | udelay(1); | |
215 | ioc4_dma = hwif->INL(dma_base + IOC4_DMA_CTRL * 4); | |
216 | } | |
217 | return ioc4_dma; | |
218 | } | |
219 | ||
220 | /* Stops the IOC4 DMA Engine */ | |
221 | static int | |
222 | sgiioc4_ide_dma_end(ide_drive_t * drive) | |
223 | { | |
224 | u32 ioc4_dma, bc_dev, bc_mem, num, valid = 0, cnt = 0; | |
225 | ide_hwif_t *hwif = HWIF(drive); | |
226 | u64 dma_base = hwif->dma_base; | |
227 | int dma_stat = 0; | |
228 | unsigned long *ending_dma = (unsigned long *) hwif->dma_base2; | |
229 | ||
230 | hwif->OUTL(IOC4_S_DMA_STOP, dma_base + IOC4_DMA_CTRL * 4); | |
231 | ||
232 | ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base); | |
233 | ||
234 | if (ioc4_dma & IOC4_S_DMA_STOP) { | |
235 | printk(KERN_ERR | |
236 | "%s(%s): IOC4 DMA STOP bit is still 1 :" | |
237 | "ioc4_dma_reg 0x%x\n", | |
238 | __FUNCTION__, drive->name, ioc4_dma); | |
239 | dma_stat = 1; | |
240 | } | |
241 | ||
242 | /* | |
243 | * The IOC4 will DMA 1's to the ending dma area to indicate that | |
244 | * previous data DMA is complete. This is necessary because of relaxed | |
245 | * ordering between register reads and DMA writes on the Altix. | |
246 | */ | |
247 | while ((cnt++ < 200) && (!valid)) { | |
248 | for (num = 0; num < 16; num++) { | |
249 | if (ending_dma[num]) { | |
250 | valid = 1; | |
251 | break; | |
252 | } | |
253 | } | |
254 | udelay(1); | |
255 | } | |
256 | if (!valid) { | |
257 | printk(KERN_ERR "%s(%s) : DMA incomplete\n", __FUNCTION__, | |
258 | drive->name); | |
259 | dma_stat = 1; | |
260 | } | |
261 | ||
262 | bc_dev = hwif->INL(dma_base + IOC4_BC_DEV * 4); | |
263 | bc_mem = hwif->INL(dma_base + IOC4_BC_MEM * 4); | |
264 | ||
265 | if ((bc_dev & 0x01FF) || (bc_mem & 0x1FF)) { | |
266 | if (bc_dev > bc_mem + 8) { | |
267 | printk(KERN_ERR | |
268 | "%s(%s): WARNING!! byte_count_dev %d " | |
269 | "!= byte_count_mem %d\n", | |
270 | __FUNCTION__, drive->name, bc_dev, bc_mem); | |
271 | } | |
272 | } | |
273 | ||
274 | drive->waiting_for_dma = 0; | |
275 | ide_destroy_dmatable(drive); | |
276 | ||
277 | return dma_stat; | |
278 | } | |
279 | ||
280 | static int | |
281 | sgiioc4_ide_dma_check(ide_drive_t * drive) | |
282 | { | |
283 | if (ide_config_drive_speed(drive, XFER_MW_DMA_2) != 0) { | |
284 | printk(KERN_INFO | |
285 | "Couldnot set %s in Multimode-2 DMA mode | " | |
286 | "Drive %s using PIO instead\n", | |
287 | drive->name, drive->name); | |
288 | drive->using_dma = 0; | |
289 | } else | |
290 | drive->using_dma = 1; | |
291 | ||
292 | return 0; | |
293 | } | |
294 | ||
295 | static int | |
296 | sgiioc4_ide_dma_on(ide_drive_t * drive) | |
297 | { | |
298 | drive->using_dma = 1; | |
299 | ||
300 | return HWIF(drive)->ide_dma_host_on(drive); | |
301 | } | |
302 | ||
303 | static int | |
304 | sgiioc4_ide_dma_off_quietly(ide_drive_t * drive) | |
305 | { | |
306 | drive->using_dma = 0; | |
307 | ||
308 | return HWIF(drive)->ide_dma_host_off(drive); | |
309 | } | |
310 | ||
311 | /* returns 1 if dma irq issued, 0 otherwise */ | |
312 | static int | |
313 | sgiioc4_ide_dma_test_irq(ide_drive_t * drive) | |
314 | { | |
315 | return sgiioc4_checkirq(HWIF(drive)); | |
316 | } | |
317 | ||
318 | static int | |
319 | sgiioc4_ide_dma_host_on(ide_drive_t * drive) | |
320 | { | |
321 | if (drive->using_dma) | |
322 | return 0; | |
323 | ||
324 | return 1; | |
325 | } | |
326 | ||
327 | static int | |
328 | sgiioc4_ide_dma_host_off(ide_drive_t * drive) | |
329 | { | |
330 | sgiioc4_clearirq(drive); | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
335 | static int | |
336 | sgiioc4_ide_dma_lostirq(ide_drive_t * drive) | |
337 | { | |
338 | HWIF(drive)->resetproc(drive); | |
339 | ||
340 | return __ide_dma_lostirq(drive); | |
341 | } | |
342 | ||
343 | static void | |
344 | sgiioc4_resetproc(ide_drive_t * drive) | |
345 | { | |
346 | sgiioc4_ide_dma_end(drive); | |
347 | sgiioc4_clearirq(drive); | |
348 | } | |
349 | ||
350 | static u8 | |
351 | sgiioc4_INB(unsigned long port) | |
352 | { | |
353 | u8 reg = (u8) inb(port); | |
354 | ||
355 | if ((port & 0xFFF) == 0x11C) { /* Status register of IOC4 */ | |
356 | if (reg & 0x51) { /* Not busy...check for interrupt */ | |
357 | unsigned long other_ir = port - 0x110; | |
358 | unsigned int intr_reg = (u32) inl(other_ir); | |
359 | ||
360 | /* Clear the Interrupt, Error bits on the IOC4 */ | |
361 | if (intr_reg & 0x03) { | |
362 | outl(0x03, other_ir); | |
363 | intr_reg = (u32) inl(other_ir); | |
364 | } | |
365 | } | |
366 | } | |
367 | ||
368 | return reg; | |
369 | } | |
370 | ||
371 | /* Creates a dma map for the scatter-gather list entries */ | |
372 | static void __devinit | |
373 | ide_dma_sgiioc4(ide_hwif_t * hwif, unsigned long dma_base) | |
374 | { | |
375 | int num_ports = sizeof (ioc4_dma_regs_t); | |
376 | ||
377 | printk(KERN_INFO "%s: BM-DMA at 0x%04lx-0x%04lx\n", hwif->name, | |
378 | dma_base, dma_base + num_ports - 1); | |
379 | ||
380 | if (!request_region(dma_base, num_ports, hwif->name)) { | |
381 | printk(KERN_ERR | |
382 | "%s(%s) -- ERROR, Addresses 0x%p to 0x%p " | |
383 | "ALREADY in use\n", | |
384 | __FUNCTION__, hwif->name, (void *) dma_base, | |
385 | (void *) dma_base + num_ports - 1); | |
386 | goto dma_alloc_failure; | |
387 | } | |
388 | ||
389 | hwif->dma_base = dma_base; | |
390 | hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev, | |
391 | IOC4_PRD_ENTRIES * IOC4_PRD_BYTES, | |
392 | &hwif->dmatable_dma); | |
393 | ||
394 | if (!hwif->dmatable_cpu) | |
395 | goto dma_alloc_failure; | |
396 | ||
397 | hwif->sg_max_nents = IOC4_PRD_ENTRIES; | |
398 | ||
399 | hwif->dma_base2 = (unsigned long) | |
400 | pci_alloc_consistent(hwif->pci_dev, | |
401 | IOC4_IDE_CACHELINE_SIZE, | |
402 | (dma_addr_t *) &(hwif->dma_status)); | |
403 | ||
404 | if (!hwif->dma_base2) | |
405 | goto dma_base2alloc_failure; | |
406 | ||
407 | return; | |
408 | ||
409 | dma_base2alloc_failure: | |
410 | pci_free_consistent(hwif->pci_dev, | |
411 | IOC4_PRD_ENTRIES * IOC4_PRD_BYTES, | |
412 | hwif->dmatable_cpu, hwif->dmatable_dma); | |
413 | printk(KERN_INFO | |
414 | "%s() -- Error! Unable to allocate DMA Maps for drive %s\n", | |
415 | __FUNCTION__, hwif->name); | |
416 | printk(KERN_INFO | |
417 | "Changing from DMA to PIO mode for Drive %s\n", hwif->name); | |
418 | ||
419 | dma_alloc_failure: | |
420 | /* Disable DMA because we couldnot allocate any DMA maps */ | |
421 | hwif->autodma = 0; | |
422 | hwif->atapi_dma = 0; | |
423 | } | |
424 | ||
425 | /* Initializes the IOC4 DMA Engine */ | |
426 | static void | |
427 | sgiioc4_configure_for_dma(int dma_direction, ide_drive_t * drive) | |
428 | { | |
429 | u32 ioc4_dma; | |
430 | ide_hwif_t *hwif = HWIF(drive); | |
431 | u64 dma_base = hwif->dma_base; | |
432 | u32 dma_addr, ending_dma_addr; | |
433 | ||
434 | ioc4_dma = hwif->INL(dma_base + IOC4_DMA_CTRL * 4); | |
435 | ||
436 | if (ioc4_dma & IOC4_S_DMA_ACTIVE) { | |
437 | printk(KERN_WARNING | |
438 | "%s(%s):Warning!! DMA from previous transfer was still active\n", | |
439 | __FUNCTION__, drive->name); | |
440 | hwif->OUTL(IOC4_S_DMA_STOP, dma_base + IOC4_DMA_CTRL * 4); | |
441 | ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base); | |
442 | ||
443 | if (ioc4_dma & IOC4_S_DMA_STOP) | |
444 | printk(KERN_ERR | |
445 | "%s(%s) : IOC4 Dma STOP bit is still 1\n", | |
446 | __FUNCTION__, drive->name); | |
447 | } | |
448 | ||
449 | ioc4_dma = hwif->INL(dma_base + IOC4_DMA_CTRL * 4); | |
450 | if (ioc4_dma & IOC4_S_DMA_ERROR) { | |
451 | printk(KERN_WARNING | |
452 | "%s(%s) : Warning!! - DMA Error during Previous" | |
453 | " transfer | status 0x%x\n", | |
454 | __FUNCTION__, drive->name, ioc4_dma); | |
455 | hwif->OUTL(IOC4_S_DMA_STOP, dma_base + IOC4_DMA_CTRL * 4); | |
456 | ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base); | |
457 | ||
458 | if (ioc4_dma & IOC4_S_DMA_STOP) | |
459 | printk(KERN_ERR | |
460 | "%s(%s) : IOC4 DMA STOP bit is still 1\n", | |
461 | __FUNCTION__, drive->name); | |
462 | } | |
463 | ||
464 | /* Address of the Scatter Gather List */ | |
465 | dma_addr = cpu_to_le32(hwif->dmatable_dma); | |
466 | hwif->OUTL(dma_addr, dma_base + IOC4_DMA_PTR_L * 4); | |
467 | ||
468 | /* Address of the Ending DMA */ | |
469 | memset((unsigned int *) hwif->dma_base2, 0, IOC4_IDE_CACHELINE_SIZE); | |
470 | ending_dma_addr = cpu_to_le32(hwif->dma_status); | |
471 | hwif->OUTL(ending_dma_addr, dma_base + IOC4_DMA_END_ADDR * 4); | |
472 | ||
473 | hwif->OUTL(dma_direction, dma_base + IOC4_DMA_CTRL * 4); | |
474 | drive->waiting_for_dma = 1; | |
475 | } | |
476 | ||
477 | /* IOC4 Scatter Gather list Format */ | |
478 | /* 128 Bit entries to support 64 bit addresses in the future */ | |
479 | /* The Scatter Gather list Entry should be in the BIG-ENDIAN Format */ | |
480 | /* --------------------------------------------------------------------- */ | |
481 | /* | Upper 32 bits - Zero | Lower 32 bits- address | */ | |
482 | /* --------------------------------------------------------------------- */ | |
483 | /* | Upper 32 bits - Zero |EOL| 15 unused | 16 Bit Length| */ | |
484 | /* --------------------------------------------------------------------- */ | |
485 | /* Creates the scatter gather list, DMA Table */ | |
486 | static unsigned int | |
487 | sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir) | |
488 | { | |
489 | ide_hwif_t *hwif = HWIF(drive); | |
490 | unsigned int *table = hwif->dmatable_cpu; | |
491 | unsigned int count = 0, i = 1; | |
492 | struct scatterlist *sg; | |
493 | ||
494 | hwif->sg_nents = i = ide_build_sglist(drive, rq); | |
495 | ||
496 | if (!i) | |
497 | return 0; /* sglist of length Zero */ | |
498 | ||
499 | sg = hwif->sg_table; | |
500 | while (i && sg_dma_len(sg)) { | |
501 | dma_addr_t cur_addr; | |
502 | int cur_len; | |
503 | cur_addr = sg_dma_address(sg); | |
504 | cur_len = sg_dma_len(sg); | |
505 | ||
506 | while (cur_len) { | |
507 | if (count++ >= IOC4_PRD_ENTRIES) { | |
508 | printk(KERN_WARNING | |
509 | "%s: DMA table too small\n", | |
510 | drive->name); | |
511 | goto use_pio_instead; | |
512 | } else { | |
513 | u32 xcount, bcount = | |
514 | 0x10000 - (cur_addr & 0xffff); | |
515 | ||
516 | if (bcount > cur_len) | |
517 | bcount = cur_len; | |
518 | ||
519 | /* put the addr, length in | |
520 | * the IOC4 dma-table format */ | |
521 | *table = 0x0; | |
522 | table++; | |
523 | *table = cpu_to_be32(cur_addr); | |
524 | table++; | |
525 | *table = 0x0; | |
526 | table++; | |
527 | ||
528 | xcount = bcount & 0xffff; | |
529 | *table = cpu_to_be32(xcount); | |
530 | table++; | |
531 | ||
532 | cur_addr += bcount; | |
533 | cur_len -= bcount; | |
534 | } | |
535 | } | |
536 | ||
537 | sg++; | |
538 | i--; | |
539 | } | |
540 | ||
541 | if (count) { | |
542 | table--; | |
543 | *table |= cpu_to_be32(0x80000000); | |
544 | return count; | |
545 | } | |
546 | ||
547 | use_pio_instead: | |
548 | pci_unmap_sg(hwif->pci_dev, hwif->sg_table, hwif->sg_nents, | |
549 | hwif->sg_dma_direction); | |
550 | ||
551 | return 0; /* revert to PIO for this request */ | |
552 | } | |
553 | ||
554 | static int sgiioc4_ide_dma_setup(ide_drive_t *drive) | |
555 | { | |
556 | struct request *rq = HWGROUP(drive)->rq; | |
557 | unsigned int count = 0; | |
558 | int ddir; | |
559 | ||
560 | if (rq_data_dir(rq)) | |
561 | ddir = PCI_DMA_TODEVICE; | |
562 | else | |
563 | ddir = PCI_DMA_FROMDEVICE; | |
564 | ||
565 | if (!(count = sgiioc4_build_dma_table(drive, rq, ddir))) { | |
566 | /* try PIO instead of DMA */ | |
567 | ide_map_sg(drive, rq); | |
568 | return 1; | |
569 | } | |
570 | ||
571 | if (rq_data_dir(rq)) | |
572 | /* Writes TO the IOC4 FROM Main Memory */ | |
573 | ddir = IOC4_DMA_READ; | |
574 | else | |
575 | /* Writes FROM the IOC4 TO Main Memory */ | |
576 | ddir = IOC4_DMA_WRITE; | |
577 | ||
578 | sgiioc4_configure_for_dma(ddir, drive); | |
579 | ||
580 | return 0; | |
581 | } | |
582 | ||
583 | static void __devinit | |
584 | ide_init_sgiioc4(ide_hwif_t * hwif) | |
585 | { | |
586 | hwif->mmio = 2; | |
587 | hwif->autodma = 1; | |
588 | hwif->atapi_dma = 1; | |
589 | hwif->ultra_mask = 0x0; /* Disable Ultra DMA */ | |
590 | hwif->mwdma_mask = 0x2; /* Multimode-2 DMA */ | |
591 | hwif->swdma_mask = 0x2; | |
592 | hwif->tuneproc = NULL; /* Sets timing for PIO mode */ | |
593 | hwif->speedproc = NULL; /* Sets timing for DMA &/or PIO modes */ | |
594 | hwif->selectproc = NULL;/* Use the default routine to select drive */ | |
595 | hwif->reset_poll = NULL;/* No HBA specific reset_poll needed */ | |
596 | hwif->pre_reset = NULL; /* No HBA specific pre_set needed */ | |
597 | hwif->resetproc = &sgiioc4_resetproc;/* Reset DMA engine, | |
598 | clear interrupts */ | |
599 | hwif->intrproc = NULL; /* Enable or Disable interrupt from drive */ | |
600 | hwif->maskproc = &sgiioc4_maskproc; /* Mask on/off NIEN register */ | |
601 | hwif->quirkproc = NULL; | |
602 | hwif->busproc = NULL; | |
603 | ||
604 | hwif->dma_setup = &sgiioc4_ide_dma_setup; | |
605 | hwif->dma_start = &sgiioc4_ide_dma_start; | |
606 | hwif->ide_dma_end = &sgiioc4_ide_dma_end; | |
607 | hwif->ide_dma_check = &sgiioc4_ide_dma_check; | |
608 | hwif->ide_dma_on = &sgiioc4_ide_dma_on; | |
609 | hwif->ide_dma_off_quietly = &sgiioc4_ide_dma_off_quietly; | |
610 | hwif->ide_dma_test_irq = &sgiioc4_ide_dma_test_irq; | |
611 | hwif->ide_dma_host_on = &sgiioc4_ide_dma_host_on; | |
612 | hwif->ide_dma_host_off = &sgiioc4_ide_dma_host_off; | |
613 | hwif->ide_dma_lostirq = &sgiioc4_ide_dma_lostirq; | |
614 | hwif->ide_dma_timeout = &__ide_dma_timeout; | |
615 | hwif->INB = &sgiioc4_INB; | |
616 | } | |
617 | ||
618 | static int __devinit | |
619 | sgiioc4_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t * d) | |
620 | { | |
621 | unsigned long base, ctl, dma_base, irqport; | |
622 | ide_hwif_t *hwif; | |
623 | int h; | |
624 | ||
625 | for (h = 0; h < MAX_HWIFS; ++h) { | |
626 | hwif = &ide_hwifs[h]; | |
627 | /* Find an empty HWIF */ | |
628 | if (hwif->chipset == ide_unknown) | |
629 | break; | |
630 | } | |
631 | ||
632 | /* Get the CmdBlk and CtrlBlk Base Registers */ | |
633 | base = pci_resource_start(dev, 0) + IOC4_CMD_OFFSET; | |
634 | ctl = pci_resource_start(dev, 0) + IOC4_CTRL_OFFSET; | |
635 | irqport = pci_resource_start(dev, 0) + IOC4_INTR_OFFSET; | |
636 | dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET; | |
637 | ||
638 | if (!request_region(base, IOC4_CMD_CTL_BLK_SIZE, hwif->name)) { | |
639 | printk(KERN_ERR | |
640 | "%s : %s -- ERROR, Port Addresses " | |
641 | "0x%p to 0x%p ALREADY in use\n", | |
642 | __FUNCTION__, hwif->name, (void *) base, | |
643 | (void *) base + IOC4_CMD_CTL_BLK_SIZE); | |
644 | return -ENOMEM; | |
645 | } | |
646 | ||
647 | if (hwif->io_ports[IDE_DATA_OFFSET] != base) { | |
648 | /* Initialize the IO registers */ | |
649 | sgiioc4_init_hwif_ports(&hwif->hw, base, ctl, irqport); | |
650 | memcpy(hwif->io_ports, hwif->hw.io_ports, | |
651 | sizeof (hwif->io_ports)); | |
652 | hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; | |
653 | } | |
654 | ||
655 | hwif->irq = dev->irq; | |
656 | hwif->chipset = ide_pci; | |
657 | hwif->pci_dev = dev; | |
658 | hwif->channel = 0; /* Single Channel chip */ | |
659 | hwif->cds = (struct ide_pci_device_s *) d; | |
660 | hwif->gendev.parent = &dev->dev;/* setup proper ancestral information */ | |
661 | ||
662 | /* Initializing chipset IRQ Registers */ | |
663 | hwif->OUTL(0x03, irqport + IOC4_INTR_SET * 4); | |
664 | ||
665 | ide_init_sgiioc4(hwif); | |
666 | ||
667 | if (dma_base) | |
668 | ide_dma_sgiioc4(hwif, dma_base); | |
669 | else | |
670 | printk(KERN_INFO "%s: %s Bus-Master DMA disabled\n", | |
671 | hwif->name, d->name); | |
672 | ||
673 | if (probe_hwif_init(hwif)) | |
674 | return -EIO; | |
675 | ||
676 | /* Create /proc/ide entries */ | |
677 | create_proc_ide_interfaces(); | |
678 | ||
679 | return 0; | |
680 | } | |
681 | ||
682 | static unsigned int __devinit | |
683 | pci_init_sgiioc4(struct pci_dev *dev, ide_pci_device_t * d) | |
684 | { | |
685 | unsigned int class_rev; | |
686 | int ret; | |
687 | ||
688 | pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev); | |
689 | class_rev &= 0xff; | |
690 | printk(KERN_INFO "%s: IDE controller at PCI slot %s, revision %d\n", | |
691 | d->name, pci_name(dev), class_rev); | |
692 | if (class_rev < IOC4_SUPPORTED_FIRMWARE_REV) { | |
693 | printk(KERN_ERR "Skipping %s IDE controller in slot %s: " | |
694 | "firmware is obsolete - please upgrade to revision" | |
695 | "46 or higher\n", d->name, pci_name(dev)); | |
696 | ret = -EAGAIN; | |
697 | goto out; | |
698 | } | |
699 | ret = sgiioc4_ide_setup_pci_device(dev, d); | |
700 | out: | |
701 | return ret; | |
702 | } | |
703 | ||
704 | static ide_pci_device_t sgiioc4_chipsets[] __devinitdata = { | |
705 | { | |
706 | /* Channel 0 */ | |
707 | .name = "SGIIOC4", | |
708 | .init_hwif = ide_init_sgiioc4, | |
709 | .init_dma = ide_dma_sgiioc4, | |
710 | .channels = 1, | |
711 | .autodma = AUTODMA, | |
712 | /* SGI IOC4 doesn't have enablebits. */ | |
713 | .bootable = ON_BOARD, | |
714 | } | |
715 | }; | |
716 | ||
717 | int | |
718 | ioc4_ide_attach_one(struct pci_dev *dev, const struct pci_device_id *id) | |
719 | { | |
720 | return pci_init_sgiioc4(dev, &sgiioc4_chipsets[id->driver_data]); | |
721 | } | |
722 | ||
723 | ||
724 | MODULE_AUTHOR("Aniket Malatpure - Silicon Graphics Inc. (SGI)"); | |
725 | MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card"); | |
726 | MODULE_LICENSE("GPL"); | |
727 | ||
728 | EXPORT_SYMBOL(ioc4_ide_attach_one); |