Commit | Line | Data |
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1da177e4 | 1 | /* |
0271fc2d | 2 | * Copyright (c) 2003-2006 Silicon Graphics, Inc. All Rights Reserved. |
1da177e4 LT |
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 | * | |
1da177e4 LT |
16 | * For further information regarding this notice, see: |
17 | * | |
18 | * http://oss.sgi.com/projects/GenInfo/NoticeExplan | |
19 | */ | |
20 | ||
21 | #include <linux/module.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/pci.h> | |
24 | #include <linux/delay.h> | |
25 | #include <linux/hdreg.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/kernel.h> | |
28 | #include <linux/timer.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/ioport.h> | |
31 | #include <linux/blkdev.h> | |
22329b51 | 32 | #include <linux/ioc4.h> |
1da177e4 LT |
33 | #include <asm/io.h> |
34 | ||
35 | #include <linux/ide.h> | |
36 | ||
37 | /* IOC4 Specific Definitions */ | |
38 | #define IOC4_CMD_OFFSET 0x100 | |
39 | #define IOC4_CTRL_OFFSET 0x120 | |
40 | #define IOC4_DMA_OFFSET 0x140 | |
41 | #define IOC4_INTR_OFFSET 0x0 | |
42 | ||
43 | #define IOC4_TIMING 0x00 | |
44 | #define IOC4_DMA_PTR_L 0x01 | |
45 | #define IOC4_DMA_PTR_H 0x02 | |
46 | #define IOC4_DMA_ADDR_L 0x03 | |
47 | #define IOC4_DMA_ADDR_H 0x04 | |
48 | #define IOC4_BC_DEV 0x05 | |
49 | #define IOC4_BC_MEM 0x06 | |
50 | #define IOC4_DMA_CTRL 0x07 | |
51 | #define IOC4_DMA_END_ADDR 0x08 | |
52 | ||
53 | /* Bits in the IOC4 Control/Status Register */ | |
54 | #define IOC4_S_DMA_START 0x01 | |
55 | #define IOC4_S_DMA_STOP 0x02 | |
56 | #define IOC4_S_DMA_DIR 0x04 | |
57 | #define IOC4_S_DMA_ACTIVE 0x08 | |
58 | #define IOC4_S_DMA_ERROR 0x10 | |
59 | #define IOC4_ATA_MEMERR 0x02 | |
60 | ||
61 | /* Read/Write Directions */ | |
62 | #define IOC4_DMA_WRITE 0x04 | |
63 | #define IOC4_DMA_READ 0x00 | |
64 | ||
65 | /* Interrupt Register Offsets */ | |
66 | #define IOC4_INTR_REG 0x03 | |
67 | #define IOC4_INTR_SET 0x05 | |
68 | #define IOC4_INTR_CLEAR 0x07 | |
69 | ||
70 | #define IOC4_IDE_CACHELINE_SIZE 128 | |
71 | #define IOC4_CMD_CTL_BLK_SIZE 0x20 | |
72 | #define IOC4_SUPPORTED_FIRMWARE_REV 46 | |
73 | ||
74 | typedef struct { | |
75 | u32 timing_reg0; | |
76 | u32 timing_reg1; | |
77 | u32 low_mem_ptr; | |
78 | u32 high_mem_ptr; | |
79 | u32 low_mem_addr; | |
80 | u32 high_mem_addr; | |
81 | u32 dev_byte_count; | |
82 | u32 mem_byte_count; | |
83 | u32 status; | |
84 | } ioc4_dma_regs_t; | |
85 | ||
86 | /* Each Physical Region Descriptor Entry size is 16 bytes (2 * 64 bits) */ | |
87 | /* IOC4 has only 1 IDE channel */ | |
88 | #define IOC4_PRD_BYTES 16 | |
89 | #define IOC4_PRD_ENTRIES (PAGE_SIZE /(4*IOC4_PRD_BYTES)) | |
90 | ||
91 | ||
92 | static void | |
93 | sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port, | |
94 | unsigned long ctrl_port, unsigned long irq_port) | |
95 | { | |
96 | unsigned long reg = data_port; | |
97 | int i; | |
98 | ||
99 | /* Registers are word (32 bit) aligned */ | |
100 | for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) | |
101 | hw->io_ports[i] = reg + i * 4; | |
102 | ||
103 | if (ctrl_port) | |
104 | hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port; | |
105 | ||
106 | if (irq_port) | |
107 | hw->io_ports[IDE_IRQ_OFFSET] = irq_port; | |
108 | } | |
109 | ||
110 | static void | |
111 | sgiioc4_maskproc(ide_drive_t * drive, int mask) | |
112 | { | |
0ecdca26 BZ |
113 | writeb(mask ? (drive->ctl | 2) : (drive->ctl & ~2), |
114 | (void __iomem *)IDE_CONTROL_REG); | |
1da177e4 LT |
115 | } |
116 | ||
117 | ||
118 | static int | |
119 | sgiioc4_checkirq(ide_hwif_t * hwif) | |
120 | { | |
0ecdca26 BZ |
121 | unsigned long intr_addr = |
122 | hwif->io_ports[IDE_IRQ_OFFSET] + IOC4_INTR_REG * 4; | |
1da177e4 | 123 | |
0ecdca26 | 124 | if ((u8)readl((void __iomem *)intr_addr) & 0x03) |
1da177e4 LT |
125 | return 1; |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
0ecdca26 | 130 | static u8 sgiioc4_INB(unsigned long); |
1da177e4 LT |
131 | |
132 | static int | |
133 | sgiioc4_clearirq(ide_drive_t * drive) | |
134 | { | |
135 | u32 intr_reg; | |
136 | ide_hwif_t *hwif = HWIF(drive); | |
137 | unsigned long other_ir = | |
138 | hwif->io_ports[IDE_IRQ_OFFSET] + (IOC4_INTR_REG << 2); | |
139 | ||
140 | /* Code to check for PCI error conditions */ | |
0ecdca26 | 141 | intr_reg = readl((void __iomem *)other_ir); |
1da177e4 LT |
142 | if (intr_reg & 0x03) { /* Valid IOC4-IDE interrupt */ |
143 | /* | |
0ecdca26 | 144 | * Using sgiioc4_INB to read the IDE_STATUS_REG has a side effect |
1da177e4 LT |
145 | * of clearing the interrupt. The first read should clear it |
146 | * if it is set. The second read should return a "clear" status | |
147 | * if it got cleared. If not, then spin for a bit trying to | |
148 | * clear it. | |
149 | */ | |
0ecdca26 | 150 | u8 stat = sgiioc4_INB(IDE_STATUS_REG); |
1da177e4 | 151 | int count = 0; |
0ecdca26 | 152 | stat = sgiioc4_INB(IDE_STATUS_REG); |
1da177e4 LT |
153 | while ((stat & 0x80) && (count++ < 100)) { |
154 | udelay(1); | |
0ecdca26 | 155 | stat = sgiioc4_INB(IDE_STATUS_REG); |
1da177e4 LT |
156 | } |
157 | ||
158 | if (intr_reg & 0x02) { | |
159 | /* Error when transferring DMA data on PCI bus */ | |
160 | u32 pci_err_addr_low, pci_err_addr_high, | |
161 | pci_stat_cmd_reg; | |
162 | ||
163 | pci_err_addr_low = | |
0ecdca26 | 164 | readl((void __iomem *)hwif->io_ports[IDE_IRQ_OFFSET]); |
1da177e4 | 165 | pci_err_addr_high = |
0ecdca26 | 166 | readl((void __iomem *)(hwif->io_ports[IDE_IRQ_OFFSET] + 4)); |
1da177e4 LT |
167 | pci_read_config_dword(hwif->pci_dev, PCI_COMMAND, |
168 | &pci_stat_cmd_reg); | |
169 | printk(KERN_ERR | |
170 | "%s(%s) : PCI Bus Error when doing DMA:" | |
171 | " status-cmd reg is 0x%x\n", | |
172 | __FUNCTION__, drive->name, pci_stat_cmd_reg); | |
173 | printk(KERN_ERR | |
174 | "%s(%s) : PCI Error Address is 0x%x%x\n", | |
175 | __FUNCTION__, drive->name, | |
176 | pci_err_addr_high, pci_err_addr_low); | |
177 | /* Clear the PCI Error indicator */ | |
178 | pci_write_config_dword(hwif->pci_dev, PCI_COMMAND, | |
179 | 0x00000146); | |
180 | } | |
181 | ||
182 | /* Clear the Interrupt, Error bits on the IOC4 */ | |
0ecdca26 | 183 | writel(0x03, (void __iomem *)other_ir); |
1da177e4 | 184 | |
0ecdca26 | 185 | intr_reg = readl((void __iomem *)other_ir); |
1da177e4 LT |
186 | } |
187 | ||
188 | return intr_reg & 3; | |
189 | } | |
190 | ||
191 | static void sgiioc4_ide_dma_start(ide_drive_t * drive) | |
192 | { | |
193 | ide_hwif_t *hwif = HWIF(drive); | |
0ecdca26 BZ |
194 | unsigned long ioc4_dma_addr = hwif->dma_base + IOC4_DMA_CTRL * 4; |
195 | unsigned int reg = readl((void __iomem *)ioc4_dma_addr); | |
1da177e4 LT |
196 | unsigned int temp_reg = reg | IOC4_S_DMA_START; |
197 | ||
0ecdca26 | 198 | writel(temp_reg, (void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
199 | } |
200 | ||
201 | static u32 | |
202 | sgiioc4_ide_dma_stop(ide_hwif_t *hwif, u64 dma_base) | |
203 | { | |
0ecdca26 | 204 | unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4; |
1da177e4 LT |
205 | u32 ioc4_dma; |
206 | int count; | |
207 | ||
208 | count = 0; | |
0ecdca26 | 209 | ioc4_dma = readl((void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
210 | while ((ioc4_dma & IOC4_S_DMA_STOP) && (count++ < 200)) { |
211 | udelay(1); | |
0ecdca26 | 212 | ioc4_dma = readl((void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
213 | } |
214 | return ioc4_dma; | |
215 | } | |
216 | ||
217 | /* Stops the IOC4 DMA Engine */ | |
218 | static int | |
219 | sgiioc4_ide_dma_end(ide_drive_t * drive) | |
220 | { | |
221 | u32 ioc4_dma, bc_dev, bc_mem, num, valid = 0, cnt = 0; | |
222 | ide_hwif_t *hwif = HWIF(drive); | |
0ecdca26 | 223 | unsigned long dma_base = hwif->dma_base; |
1da177e4 | 224 | int dma_stat = 0; |
3f63c5e8 | 225 | unsigned long *ending_dma = ide_get_hwifdata(hwif); |
1da177e4 | 226 | |
0ecdca26 | 227 | writel(IOC4_S_DMA_STOP, (void __iomem *)(dma_base + IOC4_DMA_CTRL * 4)); |
1da177e4 LT |
228 | |
229 | ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base); | |
230 | ||
231 | if (ioc4_dma & IOC4_S_DMA_STOP) { | |
232 | printk(KERN_ERR | |
233 | "%s(%s): IOC4 DMA STOP bit is still 1 :" | |
234 | "ioc4_dma_reg 0x%x\n", | |
235 | __FUNCTION__, drive->name, ioc4_dma); | |
236 | dma_stat = 1; | |
237 | } | |
238 | ||
239 | /* | |
240 | * The IOC4 will DMA 1's to the ending dma area to indicate that | |
241 | * previous data DMA is complete. This is necessary because of relaxed | |
242 | * ordering between register reads and DMA writes on the Altix. | |
243 | */ | |
244 | while ((cnt++ < 200) && (!valid)) { | |
245 | for (num = 0; num < 16; num++) { | |
246 | if (ending_dma[num]) { | |
247 | valid = 1; | |
248 | break; | |
249 | } | |
250 | } | |
251 | udelay(1); | |
252 | } | |
253 | if (!valid) { | |
254 | printk(KERN_ERR "%s(%s) : DMA incomplete\n", __FUNCTION__, | |
255 | drive->name); | |
256 | dma_stat = 1; | |
257 | } | |
258 | ||
0ecdca26 BZ |
259 | bc_dev = readl((void __iomem *)(dma_base + IOC4_BC_DEV * 4)); |
260 | bc_mem = readl((void __iomem *)(dma_base + IOC4_BC_MEM * 4)); | |
1da177e4 LT |
261 | |
262 | if ((bc_dev & 0x01FF) || (bc_mem & 0x1FF)) { | |
263 | if (bc_dev > bc_mem + 8) { | |
264 | printk(KERN_ERR | |
265 | "%s(%s): WARNING!! byte_count_dev %d " | |
266 | "!= byte_count_mem %d\n", | |
267 | __FUNCTION__, drive->name, bc_dev, bc_mem); | |
268 | } | |
269 | } | |
270 | ||
271 | drive->waiting_for_dma = 0; | |
272 | ide_destroy_dmatable(drive); | |
273 | ||
274 | return dma_stat; | |
275 | } | |
276 | ||
277 | static int | |
278 | sgiioc4_ide_dma_check(ide_drive_t * drive) | |
279 | { | |
280 | if (ide_config_drive_speed(drive, XFER_MW_DMA_2) != 0) { | |
281 | printk(KERN_INFO | |
282 | "Couldnot set %s in Multimode-2 DMA mode | " | |
283 | "Drive %s using PIO instead\n", | |
284 | drive->name, drive->name); | |
285 | drive->using_dma = 0; | |
286 | } else | |
287 | drive->using_dma = 1; | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | static int | |
293 | sgiioc4_ide_dma_on(ide_drive_t * drive) | |
294 | { | |
295 | drive->using_dma = 1; | |
296 | ||
297 | return HWIF(drive)->ide_dma_host_on(drive); | |
298 | } | |
299 | ||
300 | static int | |
301 | sgiioc4_ide_dma_off_quietly(ide_drive_t * drive) | |
302 | { | |
303 | drive->using_dma = 0; | |
304 | ||
305 | return HWIF(drive)->ide_dma_host_off(drive); | |
306 | } | |
307 | ||
308 | /* returns 1 if dma irq issued, 0 otherwise */ | |
309 | static int | |
310 | sgiioc4_ide_dma_test_irq(ide_drive_t * drive) | |
311 | { | |
312 | return sgiioc4_checkirq(HWIF(drive)); | |
313 | } | |
314 | ||
315 | static int | |
316 | sgiioc4_ide_dma_host_on(ide_drive_t * drive) | |
317 | { | |
318 | if (drive->using_dma) | |
319 | return 0; | |
320 | ||
321 | return 1; | |
322 | } | |
323 | ||
324 | static int | |
325 | sgiioc4_ide_dma_host_off(ide_drive_t * drive) | |
326 | { | |
327 | sgiioc4_clearirq(drive); | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
332 | static int | |
333 | sgiioc4_ide_dma_lostirq(ide_drive_t * drive) | |
334 | { | |
335 | HWIF(drive)->resetproc(drive); | |
336 | ||
337 | return __ide_dma_lostirq(drive); | |
338 | } | |
339 | ||
340 | static void | |
341 | sgiioc4_resetproc(ide_drive_t * drive) | |
342 | { | |
343 | sgiioc4_ide_dma_end(drive); | |
344 | sgiioc4_clearirq(drive); | |
345 | } | |
346 | ||
347 | static u8 | |
348 | sgiioc4_INB(unsigned long port) | |
349 | { | |
a835fa79 | 350 | u8 reg = (u8) readb((void __iomem *) port); |
1da177e4 LT |
351 | |
352 | if ((port & 0xFFF) == 0x11C) { /* Status register of IOC4 */ | |
353 | if (reg & 0x51) { /* Not busy...check for interrupt */ | |
354 | unsigned long other_ir = port - 0x110; | |
a835fa79 | 355 | unsigned int intr_reg = (u32) readl((void __iomem *) other_ir); |
1da177e4 LT |
356 | |
357 | /* Clear the Interrupt, Error bits on the IOC4 */ | |
358 | if (intr_reg & 0x03) { | |
a835fa79 JH |
359 | writel(0x03, (void __iomem *) other_ir); |
360 | intr_reg = (u32) readl((void __iomem *) other_ir); | |
1da177e4 LT |
361 | } |
362 | } | |
363 | } | |
364 | ||
365 | return reg; | |
366 | } | |
367 | ||
368 | /* Creates a dma map for the scatter-gather list entries */ | |
369 | static void __devinit | |
370 | ide_dma_sgiioc4(ide_hwif_t * hwif, unsigned long dma_base) | |
371 | { | |
1678df37 | 372 | void __iomem *virt_dma_base; |
1da177e4 | 373 | int num_ports = sizeof (ioc4_dma_regs_t); |
3f63c5e8 | 374 | void *pad; |
1da177e4 LT |
375 | |
376 | printk(KERN_INFO "%s: BM-DMA at 0x%04lx-0x%04lx\n", hwif->name, | |
377 | dma_base, dma_base + num_ports - 1); | |
378 | ||
1678df37 | 379 | if (!request_mem_region(dma_base, num_ports, hwif->name)) { |
1da177e4 LT |
380 | printk(KERN_ERR |
381 | "%s(%s) -- ERROR, Addresses 0x%p to 0x%p " | |
382 | "ALREADY in use\n", | |
383 | __FUNCTION__, hwif->name, (void *) dma_base, | |
384 | (void *) dma_base + num_ports - 1); | |
385 | goto dma_alloc_failure; | |
386 | } | |
387 | ||
1678df37 JK |
388 | virt_dma_base = ioremap(dma_base, num_ports); |
389 | if (virt_dma_base == NULL) { | |
390 | printk(KERN_ERR | |
391 | "%s(%s) -- ERROR, Unable to map addresses 0x%lx to 0x%lx\n", | |
392 | __FUNCTION__, hwif->name, dma_base, dma_base + num_ports - 1); | |
393 | goto dma_remap_failure; | |
394 | } | |
395 | hwif->dma_base = (unsigned long) virt_dma_base; | |
396 | ||
1da177e4 LT |
397 | hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev, |
398 | IOC4_PRD_ENTRIES * IOC4_PRD_BYTES, | |
399 | &hwif->dmatable_dma); | |
400 | ||
401 | if (!hwif->dmatable_cpu) | |
1678df37 | 402 | goto dma_pci_alloc_failure; |
1da177e4 LT |
403 | |
404 | hwif->sg_max_nents = IOC4_PRD_ENTRIES; | |
405 | ||
3f63c5e8 SS |
406 | pad = pci_alloc_consistent(hwif->pci_dev, IOC4_IDE_CACHELINE_SIZE, |
407 | (dma_addr_t *) &(hwif->dma_status)); | |
1da177e4 | 408 | |
3f63c5e8 SS |
409 | if (pad) { |
410 | ide_set_hwifdata(hwif, pad); | |
411 | return; | |
412 | } | |
1da177e4 | 413 | |
1da177e4 LT |
414 | pci_free_consistent(hwif->pci_dev, |
415 | IOC4_PRD_ENTRIES * IOC4_PRD_BYTES, | |
416 | hwif->dmatable_cpu, hwif->dmatable_dma); | |
417 | printk(KERN_INFO | |
418 | "%s() -- Error! Unable to allocate DMA Maps for drive %s\n", | |
419 | __FUNCTION__, hwif->name); | |
420 | printk(KERN_INFO | |
421 | "Changing from DMA to PIO mode for Drive %s\n", hwif->name); | |
422 | ||
1678df37 JK |
423 | dma_pci_alloc_failure: |
424 | iounmap(virt_dma_base); | |
425 | ||
426 | dma_remap_failure: | |
427 | release_mem_region(dma_base, num_ports); | |
428 | ||
1da177e4 LT |
429 | dma_alloc_failure: |
430 | /* Disable DMA because we couldnot allocate any DMA maps */ | |
431 | hwif->autodma = 0; | |
432 | hwif->atapi_dma = 0; | |
433 | } | |
434 | ||
435 | /* Initializes the IOC4 DMA Engine */ | |
436 | static void | |
437 | sgiioc4_configure_for_dma(int dma_direction, ide_drive_t * drive) | |
438 | { | |
439 | u32 ioc4_dma; | |
440 | ide_hwif_t *hwif = HWIF(drive); | |
0ecdca26 BZ |
441 | unsigned long dma_base = hwif->dma_base; |
442 | unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4; | |
1da177e4 LT |
443 | u32 dma_addr, ending_dma_addr; |
444 | ||
0ecdca26 | 445 | ioc4_dma = readl((void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
446 | |
447 | if (ioc4_dma & IOC4_S_DMA_ACTIVE) { | |
448 | printk(KERN_WARNING | |
449 | "%s(%s):Warning!! DMA from previous transfer was still active\n", | |
450 | __FUNCTION__, drive->name); | |
0ecdca26 | 451 | writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
452 | ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base); |
453 | ||
454 | if (ioc4_dma & IOC4_S_DMA_STOP) | |
455 | printk(KERN_ERR | |
456 | "%s(%s) : IOC4 Dma STOP bit is still 1\n", | |
457 | __FUNCTION__, drive->name); | |
458 | } | |
459 | ||
0ecdca26 | 460 | ioc4_dma = readl((void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
461 | if (ioc4_dma & IOC4_S_DMA_ERROR) { |
462 | printk(KERN_WARNING | |
463 | "%s(%s) : Warning!! - DMA Error during Previous" | |
464 | " transfer | status 0x%x\n", | |
465 | __FUNCTION__, drive->name, ioc4_dma); | |
0ecdca26 | 466 | writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
467 | ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base); |
468 | ||
469 | if (ioc4_dma & IOC4_S_DMA_STOP) | |
470 | printk(KERN_ERR | |
471 | "%s(%s) : IOC4 DMA STOP bit is still 1\n", | |
472 | __FUNCTION__, drive->name); | |
473 | } | |
474 | ||
475 | /* Address of the Scatter Gather List */ | |
476 | dma_addr = cpu_to_le32(hwif->dmatable_dma); | |
0ecdca26 | 477 | writel(dma_addr, (void __iomem *)(dma_base + IOC4_DMA_PTR_L * 4)); |
1da177e4 LT |
478 | |
479 | /* Address of the Ending DMA */ | |
3f63c5e8 | 480 | memset(ide_get_hwifdata(hwif), 0, IOC4_IDE_CACHELINE_SIZE); |
1da177e4 | 481 | ending_dma_addr = cpu_to_le32(hwif->dma_status); |
0ecdca26 | 482 | writel(ending_dma_addr, (void __iomem *)(dma_base + IOC4_DMA_END_ADDR * 4)); |
1da177e4 | 483 | |
0ecdca26 | 484 | writel(dma_direction, (void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
485 | drive->waiting_for_dma = 1; |
486 | } | |
487 | ||
488 | /* IOC4 Scatter Gather list Format */ | |
489 | /* 128 Bit entries to support 64 bit addresses in the future */ | |
490 | /* The Scatter Gather list Entry should be in the BIG-ENDIAN Format */ | |
491 | /* --------------------------------------------------------------------- */ | |
492 | /* | Upper 32 bits - Zero | Lower 32 bits- address | */ | |
493 | /* --------------------------------------------------------------------- */ | |
494 | /* | Upper 32 bits - Zero |EOL| 15 unused | 16 Bit Length| */ | |
495 | /* --------------------------------------------------------------------- */ | |
496 | /* Creates the scatter gather list, DMA Table */ | |
497 | static unsigned int | |
498 | sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir) | |
499 | { | |
500 | ide_hwif_t *hwif = HWIF(drive); | |
501 | unsigned int *table = hwif->dmatable_cpu; | |
502 | unsigned int count = 0, i = 1; | |
503 | struct scatterlist *sg; | |
504 | ||
505 | hwif->sg_nents = i = ide_build_sglist(drive, rq); | |
506 | ||
507 | if (!i) | |
508 | return 0; /* sglist of length Zero */ | |
509 | ||
510 | sg = hwif->sg_table; | |
511 | while (i && sg_dma_len(sg)) { | |
512 | dma_addr_t cur_addr; | |
513 | int cur_len; | |
514 | cur_addr = sg_dma_address(sg); | |
515 | cur_len = sg_dma_len(sg); | |
516 | ||
517 | while (cur_len) { | |
518 | if (count++ >= IOC4_PRD_ENTRIES) { | |
519 | printk(KERN_WARNING | |
520 | "%s: DMA table too small\n", | |
521 | drive->name); | |
522 | goto use_pio_instead; | |
523 | } else { | |
0271fc2d | 524 | u32 bcount = |
1da177e4 LT |
525 | 0x10000 - (cur_addr & 0xffff); |
526 | ||
527 | if (bcount > cur_len) | |
528 | bcount = cur_len; | |
529 | ||
530 | /* put the addr, length in | |
531 | * the IOC4 dma-table format */ | |
532 | *table = 0x0; | |
533 | table++; | |
534 | *table = cpu_to_be32(cur_addr); | |
535 | table++; | |
536 | *table = 0x0; | |
537 | table++; | |
538 | ||
0271fc2d | 539 | *table = cpu_to_be32(bcount); |
1da177e4 LT |
540 | table++; |
541 | ||
542 | cur_addr += bcount; | |
543 | cur_len -= bcount; | |
544 | } | |
545 | } | |
546 | ||
547 | sg++; | |
548 | i--; | |
549 | } | |
550 | ||
551 | if (count) { | |
552 | table--; | |
553 | *table |= cpu_to_be32(0x80000000); | |
554 | return count; | |
555 | } | |
556 | ||
557 | use_pio_instead: | |
558 | pci_unmap_sg(hwif->pci_dev, hwif->sg_table, hwif->sg_nents, | |
559 | hwif->sg_dma_direction); | |
560 | ||
561 | return 0; /* revert to PIO for this request */ | |
562 | } | |
563 | ||
564 | static int sgiioc4_ide_dma_setup(ide_drive_t *drive) | |
565 | { | |
566 | struct request *rq = HWGROUP(drive)->rq; | |
567 | unsigned int count = 0; | |
568 | int ddir; | |
569 | ||
570 | if (rq_data_dir(rq)) | |
571 | ddir = PCI_DMA_TODEVICE; | |
572 | else | |
573 | ddir = PCI_DMA_FROMDEVICE; | |
574 | ||
575 | if (!(count = sgiioc4_build_dma_table(drive, rq, ddir))) { | |
576 | /* try PIO instead of DMA */ | |
577 | ide_map_sg(drive, rq); | |
578 | return 1; | |
579 | } | |
580 | ||
581 | if (rq_data_dir(rq)) | |
582 | /* Writes TO the IOC4 FROM Main Memory */ | |
583 | ddir = IOC4_DMA_READ; | |
584 | else | |
585 | /* Writes FROM the IOC4 TO Main Memory */ | |
586 | ddir = IOC4_DMA_WRITE; | |
587 | ||
588 | sgiioc4_configure_for_dma(ddir, drive); | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | static void __devinit | |
594 | ide_init_sgiioc4(ide_hwif_t * hwif) | |
595 | { | |
596 | hwif->mmio = 2; | |
597 | hwif->autodma = 1; | |
598 | hwif->atapi_dma = 1; | |
599 | hwif->ultra_mask = 0x0; /* Disable Ultra DMA */ | |
600 | hwif->mwdma_mask = 0x2; /* Multimode-2 DMA */ | |
601 | hwif->swdma_mask = 0x2; | |
602 | hwif->tuneproc = NULL; /* Sets timing for PIO mode */ | |
603 | hwif->speedproc = NULL; /* Sets timing for DMA &/or PIO modes */ | |
604 | hwif->selectproc = NULL;/* Use the default routine to select drive */ | |
605 | hwif->reset_poll = NULL;/* No HBA specific reset_poll needed */ | |
606 | hwif->pre_reset = NULL; /* No HBA specific pre_set needed */ | |
607 | hwif->resetproc = &sgiioc4_resetproc;/* Reset DMA engine, | |
608 | clear interrupts */ | |
609 | hwif->intrproc = NULL; /* Enable or Disable interrupt from drive */ | |
610 | hwif->maskproc = &sgiioc4_maskproc; /* Mask on/off NIEN register */ | |
611 | hwif->quirkproc = NULL; | |
612 | hwif->busproc = NULL; | |
613 | ||
614 | hwif->dma_setup = &sgiioc4_ide_dma_setup; | |
615 | hwif->dma_start = &sgiioc4_ide_dma_start; | |
616 | hwif->ide_dma_end = &sgiioc4_ide_dma_end; | |
617 | hwif->ide_dma_check = &sgiioc4_ide_dma_check; | |
618 | hwif->ide_dma_on = &sgiioc4_ide_dma_on; | |
619 | hwif->ide_dma_off_quietly = &sgiioc4_ide_dma_off_quietly; | |
620 | hwif->ide_dma_test_irq = &sgiioc4_ide_dma_test_irq; | |
621 | hwif->ide_dma_host_on = &sgiioc4_ide_dma_host_on; | |
622 | hwif->ide_dma_host_off = &sgiioc4_ide_dma_host_off; | |
623 | hwif->ide_dma_lostirq = &sgiioc4_ide_dma_lostirq; | |
624 | hwif->ide_dma_timeout = &__ide_dma_timeout; | |
a835fa79 | 625 | |
1da177e4 LT |
626 | hwif->INB = &sgiioc4_INB; |
627 | } | |
628 | ||
629 | static int __devinit | |
630 | sgiioc4_ide_setup_pci_device(struct pci_dev *dev, ide_pci_device_t * d) | |
631 | { | |
1678df37 JK |
632 | unsigned long cmd_base, dma_base, irqport; |
633 | unsigned long bar0, cmd_phys_base, ctl; | |
634 | void __iomem *virt_base; | |
1da177e4 LT |
635 | ide_hwif_t *hwif; |
636 | int h; | |
637 | ||
deb5e5c0 JH |
638 | /* |
639 | * Find an empty HWIF; if none available, return -ENOMEM. | |
640 | */ | |
1da177e4 LT |
641 | for (h = 0; h < MAX_HWIFS; ++h) { |
642 | hwif = &ide_hwifs[h]; | |
1da177e4 LT |
643 | if (hwif->chipset == ide_unknown) |
644 | break; | |
645 | } | |
deb5e5c0 JH |
646 | if (h == MAX_HWIFS) { |
647 | printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n", d->name); | |
648 | return -ENOMEM; | |
649 | } | |
1da177e4 LT |
650 | |
651 | /* Get the CmdBlk and CtrlBlk Base Registers */ | |
1678df37 JK |
652 | bar0 = pci_resource_start(dev, 0); |
653 | virt_base = ioremap(bar0, pci_resource_len(dev, 0)); | |
654 | if (virt_base == NULL) { | |
655 | printk(KERN_ERR "%s: Unable to remap BAR 0 address: 0x%lx\n", | |
656 | d->name, bar0); | |
657 | return -ENOMEM; | |
658 | } | |
659 | cmd_base = (unsigned long) virt_base + IOC4_CMD_OFFSET; | |
660 | ctl = (unsigned long) virt_base + IOC4_CTRL_OFFSET; | |
661 | irqport = (unsigned long) virt_base + IOC4_INTR_OFFSET; | |
1da177e4 LT |
662 | dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET; |
663 | ||
1678df37 JK |
664 | cmd_phys_base = bar0 + IOC4_CMD_OFFSET; |
665 | if (!request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE, | |
666 | hwif->name)) { | |
1da177e4 | 667 | printk(KERN_ERR |
1678df37 | 668 | "%s : %s -- ERROR, Addresses " |
1da177e4 | 669 | "0x%p to 0x%p ALREADY in use\n", |
1678df37 JK |
670 | __FUNCTION__, hwif->name, (void *) cmd_phys_base, |
671 | (void *) cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE); | |
1da177e4 LT |
672 | return -ENOMEM; |
673 | } | |
674 | ||
1678df37 | 675 | if (hwif->io_ports[IDE_DATA_OFFSET] != cmd_base) { |
1da177e4 | 676 | /* Initialize the IO registers */ |
1678df37 | 677 | sgiioc4_init_hwif_ports(&hwif->hw, cmd_base, ctl, irqport); |
1da177e4 LT |
678 | memcpy(hwif->io_ports, hwif->hw.io_ports, |
679 | sizeof (hwif->io_ports)); | |
680 | hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET]; | |
681 | } | |
682 | ||
683 | hwif->irq = dev->irq; | |
684 | hwif->chipset = ide_pci; | |
685 | hwif->pci_dev = dev; | |
686 | hwif->channel = 0; /* Single Channel chip */ | |
687 | hwif->cds = (struct ide_pci_device_s *) d; | |
688 | hwif->gendev.parent = &dev->dev;/* setup proper ancestral information */ | |
689 | ||
1678df37 JK |
690 | /* The IOC4 uses MMIO rather than Port IO. */ |
691 | default_hwif_mmiops(hwif); | |
692 | ||
1da177e4 | 693 | /* Initializing chipset IRQ Registers */ |
0ecdca26 | 694 | writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4)); |
1da177e4 LT |
695 | |
696 | ide_init_sgiioc4(hwif); | |
697 | ||
698 | if (dma_base) | |
699 | ide_dma_sgiioc4(hwif, dma_base); | |
700 | else | |
701 | printk(KERN_INFO "%s: %s Bus-Master DMA disabled\n", | |
702 | hwif->name, d->name); | |
703 | ||
704 | if (probe_hwif_init(hwif)) | |
705 | return -EIO; | |
706 | ||
707 | /* Create /proc/ide entries */ | |
0271fc2d | 708 | create_proc_ide_interfaces(); |
1da177e4 LT |
709 | |
710 | return 0; | |
711 | } | |
712 | ||
713 | static unsigned int __devinit | |
714 | pci_init_sgiioc4(struct pci_dev *dev, ide_pci_device_t * d) | |
715 | { | |
716 | unsigned int class_rev; | |
717 | int ret; | |
718 | ||
719 | pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev); | |
720 | class_rev &= 0xff; | |
721 | printk(KERN_INFO "%s: IDE controller at PCI slot %s, revision %d\n", | |
722 | d->name, pci_name(dev), class_rev); | |
723 | if (class_rev < IOC4_SUPPORTED_FIRMWARE_REV) { | |
724 | printk(KERN_ERR "Skipping %s IDE controller in slot %s: " | |
725 | "firmware is obsolete - please upgrade to revision" | |
726 | "46 or higher\n", d->name, pci_name(dev)); | |
727 | ret = -EAGAIN; | |
728 | goto out; | |
729 | } | |
730 | ret = sgiioc4_ide_setup_pci_device(dev, d); | |
731 | out: | |
732 | return ret; | |
733 | } | |
734 | ||
7b77d864 | 735 | static ide_pci_device_t sgiioc4_chipset __devinitdata = { |
1da177e4 LT |
736 | /* Channel 0 */ |
737 | .name = "SGIIOC4", | |
738 | .init_hwif = ide_init_sgiioc4, | |
739 | .init_dma = ide_dma_sgiioc4, | |
740 | .channels = 1, | |
741 | .autodma = AUTODMA, | |
742 | /* SGI IOC4 doesn't have enablebits. */ | |
743 | .bootable = ON_BOARD, | |
1da177e4 LT |
744 | }; |
745 | ||
746 | int | |
22329b51 | 747 | ioc4_ide_attach_one(struct ioc4_driver_data *idd) |
1da177e4 | 748 | { |
f5befceb BC |
749 | /* PCI-RT does not bring out IDE connection. |
750 | * Do not attach to this particular IOC4. | |
751 | */ | |
752 | if (idd->idd_variant == IOC4_VARIANT_PCI_RT) | |
753 | return 0; | |
754 | ||
7b77d864 | 755 | return pci_init_sgiioc4(idd->idd_pdev, &sgiioc4_chipset); |
1da177e4 LT |
756 | } |
757 | ||
22329b51 BC |
758 | static struct ioc4_submodule ioc4_ide_submodule = { |
759 | .is_name = "IOC4_ide", | |
760 | .is_owner = THIS_MODULE, | |
761 | .is_probe = ioc4_ide_attach_one, | |
762 | /* .is_remove = ioc4_ide_remove_one, */ | |
763 | }; | |
764 | ||
82ab1eec | 765 | static int __init ioc4_ide_init(void) |
22329b51 BC |
766 | { |
767 | return ioc4_register_submodule(&ioc4_ide_submodule); | |
768 | } | |
769 | ||
59f14800 | 770 | late_initcall(ioc4_ide_init); /* Call only after IDE init is done */ |
1da177e4 | 771 | |
a835fa79 | 772 | MODULE_AUTHOR("Aniket Malatpure/Jeremy Higdon"); |
1da177e4 LT |
773 | MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card"); |
774 | MODULE_LICENSE("GPL"); |