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Commit | Line | Data |
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1da177e4 | 1 | /* |
0271fc2d | 2 | * Copyright (c) 2003-2006 Silicon Graphics, Inc. All Rights Reserved. |
aa95f0e7 | 3 | * Copyright (C) 2008 MontaVista Software, Inc. |
1da177e4 LT |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of version 2 of the GNU General Public License | |
7 | * as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it would be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write the Free Software | |
15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
16 | * | |
1da177e4 LT |
17 | * For further information regarding this notice, see: |
18 | * | |
19 | * http://oss.sgi.com/projects/GenInfo/NoticeExplan | |
20 | */ | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/pci.h> | |
25 | #include <linux/delay.h> | |
1da177e4 LT |
26 | #include <linux/init.h> |
27 | #include <linux/kernel.h> | |
1da177e4 LT |
28 | #include <linux/ioport.h> |
29 | #include <linux/blkdev.h> | |
55c16a70 | 30 | #include <linux/scatterlist.h> |
22329b51 | 31 | #include <linux/ioc4.h> |
1da177e4 LT |
32 | #include <asm/io.h> |
33 | ||
34 | #include <linux/ide.h> | |
35 | ||
ca1997c1 BZ |
36 | #define DRV_NAME "SGIIOC4" |
37 | ||
1da177e4 LT |
38 | /* IOC4 Specific Definitions */ |
39 | #define IOC4_CMD_OFFSET 0x100 | |
40 | #define IOC4_CTRL_OFFSET 0x120 | |
41 | #define IOC4_DMA_OFFSET 0x140 | |
42 | #define IOC4_INTR_OFFSET 0x0 | |
43 | ||
44 | #define IOC4_TIMING 0x00 | |
45 | #define IOC4_DMA_PTR_L 0x01 | |
46 | #define IOC4_DMA_PTR_H 0x02 | |
47 | #define IOC4_DMA_ADDR_L 0x03 | |
48 | #define IOC4_DMA_ADDR_H 0x04 | |
49 | #define IOC4_BC_DEV 0x05 | |
50 | #define IOC4_BC_MEM 0x06 | |
51 | #define IOC4_DMA_CTRL 0x07 | |
52 | #define IOC4_DMA_END_ADDR 0x08 | |
53 | ||
54 | /* Bits in the IOC4 Control/Status Register */ | |
55 | #define IOC4_S_DMA_START 0x01 | |
56 | #define IOC4_S_DMA_STOP 0x02 | |
57 | #define IOC4_S_DMA_DIR 0x04 | |
58 | #define IOC4_S_DMA_ACTIVE 0x08 | |
59 | #define IOC4_S_DMA_ERROR 0x10 | |
60 | #define IOC4_ATA_MEMERR 0x02 | |
61 | ||
62 | /* Read/Write Directions */ | |
63 | #define IOC4_DMA_WRITE 0x04 | |
64 | #define IOC4_DMA_READ 0x00 | |
65 | ||
66 | /* Interrupt Register Offsets */ | |
67 | #define IOC4_INTR_REG 0x03 | |
68 | #define IOC4_INTR_SET 0x05 | |
69 | #define IOC4_INTR_CLEAR 0x07 | |
70 | ||
71 | #define IOC4_IDE_CACHELINE_SIZE 128 | |
72 | #define IOC4_CMD_CTL_BLK_SIZE 0x20 | |
73 | #define IOC4_SUPPORTED_FIRMWARE_REV 46 | |
74 | ||
75 | typedef struct { | |
76 | u32 timing_reg0; | |
77 | u32 timing_reg1; | |
78 | u32 low_mem_ptr; | |
79 | u32 high_mem_ptr; | |
80 | u32 low_mem_addr; | |
81 | u32 high_mem_addr; | |
82 | u32 dev_byte_count; | |
83 | u32 mem_byte_count; | |
84 | u32 status; | |
85 | } ioc4_dma_regs_t; | |
86 | ||
87 | /* Each Physical Region Descriptor Entry size is 16 bytes (2 * 64 bits) */ | |
88 | /* IOC4 has only 1 IDE channel */ | |
89 | #define IOC4_PRD_BYTES 16 | |
90 | #define IOC4_PRD_ENTRIES (PAGE_SIZE /(4*IOC4_PRD_BYTES)) | |
91 | ||
92 | ||
93 | static void | |
94 | sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port, | |
95 | unsigned long ctrl_port, unsigned long irq_port) | |
96 | { | |
97 | unsigned long reg = data_port; | |
98 | int i; | |
99 | ||
100 | /* Registers are word (32 bit) aligned */ | |
4c3032d8 BZ |
101 | for (i = 0; i <= 7; i++) |
102 | hw->io_ports_array[i] = reg + i * 4; | |
1da177e4 | 103 | |
8108b882 SS |
104 | hw->io_ports.ctl_addr = ctrl_port; |
105 | hw->io_ports.irq_addr = irq_port; | |
1da177e4 LT |
106 | } |
107 | ||
1da177e4 LT |
108 | static int |
109 | sgiioc4_checkirq(ide_hwif_t * hwif) | |
110 | { | |
0ecdca26 | 111 | unsigned long intr_addr = |
4c3032d8 | 112 | hwif->io_ports.irq_addr + IOC4_INTR_REG * 4; |
1da177e4 | 113 | |
0ecdca26 | 114 | if ((u8)readl((void __iomem *)intr_addr) & 0x03) |
1da177e4 LT |
115 | return 1; |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
b73c7ee2 | 120 | static u8 sgiioc4_read_status(ide_hwif_t *); |
1da177e4 LT |
121 | |
122 | static int | |
123 | sgiioc4_clearirq(ide_drive_t * drive) | |
124 | { | |
125 | u32 intr_reg; | |
898ec223 | 126 | ide_hwif_t *hwif = drive->hwif; |
4c3032d8 BZ |
127 | struct ide_io_ports *io_ports = &hwif->io_ports; |
128 | unsigned long other_ir = io_ports->irq_addr + (IOC4_INTR_REG << 2); | |
1da177e4 LT |
129 | |
130 | /* Code to check for PCI error conditions */ | |
0ecdca26 | 131 | intr_reg = readl((void __iomem *)other_ir); |
1da177e4 LT |
132 | if (intr_reg & 0x03) { /* Valid IOC4-IDE interrupt */ |
133 | /* | |
b73c7ee2 BZ |
134 | * Using sgiioc4_read_status to read the Status register has a |
135 | * side effect of clearing the interrupt. The first read should | |
23579a2a BZ |
136 | * clear it if it is set. The second read should return |
137 | * a "clear" status if it got cleared. If not, then spin | |
138 | * for a bit trying to clear it. | |
1da177e4 | 139 | */ |
b73c7ee2 | 140 | u8 stat = sgiioc4_read_status(hwif); |
1da177e4 | 141 | int count = 0; |
b73c7ee2 BZ |
142 | |
143 | stat = sgiioc4_read_status(hwif); | |
aa95f0e7 | 144 | while ((stat & ATA_BUSY) && (count++ < 100)) { |
1da177e4 | 145 | udelay(1); |
b73c7ee2 | 146 | stat = sgiioc4_read_status(hwif); |
1da177e4 LT |
147 | } |
148 | ||
149 | if (intr_reg & 0x02) { | |
36501650 | 150 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
1da177e4 LT |
151 | /* Error when transferring DMA data on PCI bus */ |
152 | u32 pci_err_addr_low, pci_err_addr_high, | |
153 | pci_stat_cmd_reg; | |
154 | ||
155 | pci_err_addr_low = | |
4c3032d8 | 156 | readl((void __iomem *)io_ports->irq_addr); |
1da177e4 | 157 | pci_err_addr_high = |
4c3032d8 | 158 | readl((void __iomem *)(io_ports->irq_addr + 4)); |
36501650 | 159 | pci_read_config_dword(dev, PCI_COMMAND, |
1da177e4 LT |
160 | &pci_stat_cmd_reg); |
161 | printk(KERN_ERR | |
162 | "%s(%s) : PCI Bus Error when doing DMA:" | |
163 | " status-cmd reg is 0x%x\n", | |
eb63963a | 164 | __func__, drive->name, pci_stat_cmd_reg); |
1da177e4 LT |
165 | printk(KERN_ERR |
166 | "%s(%s) : PCI Error Address is 0x%x%x\n", | |
eb63963a | 167 | __func__, drive->name, |
1da177e4 LT |
168 | pci_err_addr_high, pci_err_addr_low); |
169 | /* Clear the PCI Error indicator */ | |
36501650 | 170 | pci_write_config_dword(dev, PCI_COMMAND, 0x00000146); |
1da177e4 LT |
171 | } |
172 | ||
173 | /* Clear the Interrupt, Error bits on the IOC4 */ | |
0ecdca26 | 174 | writel(0x03, (void __iomem *)other_ir); |
1da177e4 | 175 | |
0ecdca26 | 176 | intr_reg = readl((void __iomem *)other_ir); |
1da177e4 LT |
177 | } |
178 | ||
179 | return intr_reg & 3; | |
180 | } | |
181 | ||
5e37bdc0 | 182 | static void sgiioc4_dma_start(ide_drive_t *drive) |
1da177e4 | 183 | { |
898ec223 | 184 | ide_hwif_t *hwif = drive->hwif; |
0ecdca26 BZ |
185 | unsigned long ioc4_dma_addr = hwif->dma_base + IOC4_DMA_CTRL * 4; |
186 | unsigned int reg = readl((void __iomem *)ioc4_dma_addr); | |
1da177e4 LT |
187 | unsigned int temp_reg = reg | IOC4_S_DMA_START; |
188 | ||
0ecdca26 | 189 | writel(temp_reg, (void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
190 | } |
191 | ||
192 | static u32 | |
193 | sgiioc4_ide_dma_stop(ide_hwif_t *hwif, u64 dma_base) | |
194 | { | |
0ecdca26 | 195 | unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4; |
1da177e4 LT |
196 | u32 ioc4_dma; |
197 | int count; | |
198 | ||
199 | count = 0; | |
0ecdca26 | 200 | ioc4_dma = readl((void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
201 | while ((ioc4_dma & IOC4_S_DMA_STOP) && (count++ < 200)) { |
202 | udelay(1); | |
0ecdca26 | 203 | ioc4_dma = readl((void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
204 | } |
205 | return ioc4_dma; | |
206 | } | |
207 | ||
208 | /* Stops the IOC4 DMA Engine */ | |
5e37bdc0 | 209 | static int sgiioc4_dma_end(ide_drive_t *drive) |
1da177e4 LT |
210 | { |
211 | u32 ioc4_dma, bc_dev, bc_mem, num, valid = 0, cnt = 0; | |
898ec223 | 212 | ide_hwif_t *hwif = drive->hwif; |
0ecdca26 | 213 | unsigned long dma_base = hwif->dma_base; |
1da177e4 | 214 | int dma_stat = 0; |
3f63c5e8 | 215 | unsigned long *ending_dma = ide_get_hwifdata(hwif); |
1da177e4 | 216 | |
0ecdca26 | 217 | writel(IOC4_S_DMA_STOP, (void __iomem *)(dma_base + IOC4_DMA_CTRL * 4)); |
1da177e4 LT |
218 | |
219 | ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base); | |
220 | ||
221 | if (ioc4_dma & IOC4_S_DMA_STOP) { | |
222 | printk(KERN_ERR | |
223 | "%s(%s): IOC4 DMA STOP bit is still 1 :" | |
224 | "ioc4_dma_reg 0x%x\n", | |
eb63963a | 225 | __func__, drive->name, ioc4_dma); |
1da177e4 LT |
226 | dma_stat = 1; |
227 | } | |
228 | ||
229 | /* | |
230 | * The IOC4 will DMA 1's to the ending dma area to indicate that | |
231 | * previous data DMA is complete. This is necessary because of relaxed | |
232 | * ordering between register reads and DMA writes on the Altix. | |
233 | */ | |
234 | while ((cnt++ < 200) && (!valid)) { | |
235 | for (num = 0; num < 16; num++) { | |
236 | if (ending_dma[num]) { | |
237 | valid = 1; | |
238 | break; | |
239 | } | |
240 | } | |
241 | udelay(1); | |
242 | } | |
243 | if (!valid) { | |
eb63963a | 244 | printk(KERN_ERR "%s(%s) : DMA incomplete\n", __func__, |
1da177e4 LT |
245 | drive->name); |
246 | dma_stat = 1; | |
247 | } | |
248 | ||
0ecdca26 BZ |
249 | bc_dev = readl((void __iomem *)(dma_base + IOC4_BC_DEV * 4)); |
250 | bc_mem = readl((void __iomem *)(dma_base + IOC4_BC_MEM * 4)); | |
1da177e4 LT |
251 | |
252 | if ((bc_dev & 0x01FF) || (bc_mem & 0x1FF)) { | |
253 | if (bc_dev > bc_mem + 8) { | |
254 | printk(KERN_ERR | |
255 | "%s(%s): WARNING!! byte_count_dev %d " | |
256 | "!= byte_count_mem %d\n", | |
eb63963a | 257 | __func__, drive->name, bc_dev, bc_mem); |
1da177e4 LT |
258 | } |
259 | } | |
260 | ||
261 | drive->waiting_for_dma = 0; | |
262 | ide_destroy_dmatable(drive); | |
263 | ||
264 | return dma_stat; | |
265 | } | |
266 | ||
88b2b32b | 267 | static void sgiioc4_set_dma_mode(ide_drive_t *drive, const u8 speed) |
ca1997c1 | 268 | { |
ca1997c1 BZ |
269 | } |
270 | ||
1da177e4 | 271 | /* returns 1 if dma irq issued, 0 otherwise */ |
5e37bdc0 | 272 | static int sgiioc4_dma_test_irq(ide_drive_t *drive) |
1da177e4 | 273 | { |
898ec223 | 274 | return sgiioc4_checkirq(drive->hwif); |
1da177e4 LT |
275 | } |
276 | ||
15ce926a | 277 | static void sgiioc4_dma_host_set(ide_drive_t *drive, int on) |
1da177e4 | 278 | { |
15ce926a BZ |
279 | if (!on) |
280 | sgiioc4_clearirq(drive); | |
1da177e4 LT |
281 | } |
282 | ||
1da177e4 LT |
283 | static void |
284 | sgiioc4_resetproc(ide_drive_t * drive) | |
285 | { | |
5e37bdc0 | 286 | sgiioc4_dma_end(drive); |
1da177e4 LT |
287 | sgiioc4_clearirq(drive); |
288 | } | |
289 | ||
841d2a9b SS |
290 | static void |
291 | sgiioc4_dma_lost_irq(ide_drive_t * drive) | |
292 | { | |
293 | sgiioc4_resetproc(drive); | |
294 | ||
295 | ide_dma_lost_irq(drive); | |
296 | } | |
297 | ||
b73c7ee2 | 298 | static u8 sgiioc4_read_status(ide_hwif_t *hwif) |
1da177e4 | 299 | { |
b73c7ee2 | 300 | unsigned long port = hwif->io_ports.status_addr; |
a835fa79 | 301 | u8 reg = (u8) readb((void __iomem *) port); |
1da177e4 | 302 | |
8108b882 SS |
303 | if (!(reg & ATA_BUSY)) { /* Not busy... check for interrupt */ |
304 | unsigned long other_ir = port - 0x110; | |
305 | unsigned int intr_reg = (u32) readl((void __iomem *) other_ir); | |
1da177e4 | 306 | |
8108b882 SS |
307 | /* Clear the Interrupt, Error bits on the IOC4 */ |
308 | if (intr_reg & 0x03) { | |
309 | writel(0x03, (void __iomem *) other_ir); | |
310 | intr_reg = (u32) readl((void __iomem *) other_ir); | |
1da177e4 LT |
311 | } |
312 | } | |
313 | ||
314 | return reg; | |
315 | } | |
316 | ||
317 | /* Creates a dma map for the scatter-gather list entries */ | |
ca1997c1 | 318 | static int __devinit |
04216fa1 | 319 | ide_dma_sgiioc4(ide_hwif_t *hwif, const struct ide_port_info *d) |
1da177e4 | 320 | { |
36501650 | 321 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
04216fa1 | 322 | unsigned long dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET; |
1da177e4 | 323 | int num_ports = sizeof (ioc4_dma_regs_t); |
3f63c5e8 | 324 | void *pad; |
1da177e4 | 325 | |
9b5a18e1 | 326 | printk(KERN_INFO " %s: MMIO-DMA\n", hwif->name); |
1da177e4 | 327 | |
9b5a18e1 SS |
328 | if (request_mem_region(dma_base, num_ports, hwif->name) == NULL) { |
329 | printk(KERN_ERR "%s(%s) -- ERROR: addresses 0x%08lx to 0x%08lx " | |
330 | "already in use\n", __func__, hwif->name, | |
331 | dma_base, dma_base + num_ports - 1); | |
ca1997c1 | 332 | return -1; |
1da177e4 LT |
333 | } |
334 | ||
107111d4 SS |
335 | hwif->dma_base = (unsigned long)hwif->io_ports.irq_addr + |
336 | IOC4_DMA_OFFSET; | |
1678df37 | 337 | |
2bbd57ca | 338 | hwif->sg_max_nents = IOC4_PRD_ENTRIES; |
1da177e4 | 339 | |
2bbd57ca BZ |
340 | hwif->prd_max_nents = IOC4_PRD_ENTRIES; |
341 | hwif->prd_ent_size = IOC4_PRD_BYTES; | |
1da177e4 | 342 | |
2bbd57ca BZ |
343 | if (ide_allocate_dma_engine(hwif)) |
344 | goto dma_pci_alloc_failure; | |
1da177e4 | 345 | |
36501650 | 346 | pad = pci_alloc_consistent(dev, IOC4_IDE_CACHELINE_SIZE, |
912ef6d9 | 347 | (dma_addr_t *)&hwif->extra_base); |
3f63c5e8 SS |
348 | if (pad) { |
349 | ide_set_hwifdata(hwif, pad); | |
ca1997c1 | 350 | return 0; |
3f63c5e8 | 351 | } |
1da177e4 | 352 | |
2bbd57ca BZ |
353 | ide_release_dma_engine(hwif); |
354 | ||
9b5a18e1 | 355 | printk(KERN_ERR "%s(%s) -- ERROR: Unable to allocate DMA maps\n", |
eb63963a | 356 | __func__, hwif->name); |
9b5a18e1 | 357 | printk(KERN_INFO "%s: changing from DMA to PIO mode", hwif->name); |
1da177e4 | 358 | |
1678df37 | 359 | dma_pci_alloc_failure: |
1678df37 JK |
360 | release_mem_region(dma_base, num_ports); |
361 | ||
ca1997c1 | 362 | return -1; |
1da177e4 LT |
363 | } |
364 | ||
365 | /* Initializes the IOC4 DMA Engine */ | |
366 | static void | |
367 | sgiioc4_configure_for_dma(int dma_direction, ide_drive_t * drive) | |
368 | { | |
369 | u32 ioc4_dma; | |
898ec223 | 370 | ide_hwif_t *hwif = drive->hwif; |
0ecdca26 BZ |
371 | unsigned long dma_base = hwif->dma_base; |
372 | unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4; | |
1da177e4 LT |
373 | u32 dma_addr, ending_dma_addr; |
374 | ||
0ecdca26 | 375 | ioc4_dma = readl((void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
376 | |
377 | if (ioc4_dma & IOC4_S_DMA_ACTIVE) { | |
378 | printk(KERN_WARNING | |
379 | "%s(%s):Warning!! DMA from previous transfer was still active\n", | |
eb63963a | 380 | __func__, drive->name); |
0ecdca26 | 381 | writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
382 | ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base); |
383 | ||
384 | if (ioc4_dma & IOC4_S_DMA_STOP) | |
385 | printk(KERN_ERR | |
386 | "%s(%s) : IOC4 Dma STOP bit is still 1\n", | |
eb63963a | 387 | __func__, drive->name); |
1da177e4 LT |
388 | } |
389 | ||
0ecdca26 | 390 | ioc4_dma = readl((void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
391 | if (ioc4_dma & IOC4_S_DMA_ERROR) { |
392 | printk(KERN_WARNING | |
393 | "%s(%s) : Warning!! - DMA Error during Previous" | |
394 | " transfer | status 0x%x\n", | |
eb63963a | 395 | __func__, drive->name, ioc4_dma); |
0ecdca26 | 396 | writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
397 | ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base); |
398 | ||
399 | if (ioc4_dma & IOC4_S_DMA_STOP) | |
400 | printk(KERN_ERR | |
401 | "%s(%s) : IOC4 DMA STOP bit is still 1\n", | |
eb63963a | 402 | __func__, drive->name); |
1da177e4 LT |
403 | } |
404 | ||
405 | /* Address of the Scatter Gather List */ | |
406 | dma_addr = cpu_to_le32(hwif->dmatable_dma); | |
0ecdca26 | 407 | writel(dma_addr, (void __iomem *)(dma_base + IOC4_DMA_PTR_L * 4)); |
1da177e4 LT |
408 | |
409 | /* Address of the Ending DMA */ | |
3f63c5e8 | 410 | memset(ide_get_hwifdata(hwif), 0, IOC4_IDE_CACHELINE_SIZE); |
912ef6d9 | 411 | ending_dma_addr = cpu_to_le32(hwif->extra_base); |
0ecdca26 | 412 | writel(ending_dma_addr, (void __iomem *)(dma_base + IOC4_DMA_END_ADDR * 4)); |
1da177e4 | 413 | |
0ecdca26 | 414 | writel(dma_direction, (void __iomem *)ioc4_dma_addr); |
1da177e4 LT |
415 | drive->waiting_for_dma = 1; |
416 | } | |
417 | ||
418 | /* IOC4 Scatter Gather list Format */ | |
419 | /* 128 Bit entries to support 64 bit addresses in the future */ | |
420 | /* The Scatter Gather list Entry should be in the BIG-ENDIAN Format */ | |
421 | /* --------------------------------------------------------------------- */ | |
422 | /* | Upper 32 bits - Zero | Lower 32 bits- address | */ | |
423 | /* --------------------------------------------------------------------- */ | |
424 | /* | Upper 32 bits - Zero |EOL| 15 unused | 16 Bit Length| */ | |
425 | /* --------------------------------------------------------------------- */ | |
426 | /* Creates the scatter gather list, DMA Table */ | |
22981694 | 427 | static int sgiioc4_build_dmatable(ide_drive_t *drive, struct ide_cmd *cmd) |
1da177e4 | 428 | { |
898ec223 | 429 | ide_hwif_t *hwif = drive->hwif; |
1da177e4 | 430 | unsigned int *table = hwif->dmatable_cpu; |
22981694 | 431 | unsigned int count = 0, i = cmd->sg_nents; |
e6830a86 | 432 | struct scatterlist *sg = hwif->sg_table; |
1da177e4 | 433 | |
1da177e4 LT |
434 | while (i && sg_dma_len(sg)) { |
435 | dma_addr_t cur_addr; | |
436 | int cur_len; | |
437 | cur_addr = sg_dma_address(sg); | |
438 | cur_len = sg_dma_len(sg); | |
439 | ||
440 | while (cur_len) { | |
441 | if (count++ >= IOC4_PRD_ENTRIES) { | |
442 | printk(KERN_WARNING | |
443 | "%s: DMA table too small\n", | |
444 | drive->name); | |
445 | goto use_pio_instead; | |
446 | } else { | |
0271fc2d | 447 | u32 bcount = |
1da177e4 LT |
448 | 0x10000 - (cur_addr & 0xffff); |
449 | ||
450 | if (bcount > cur_len) | |
451 | bcount = cur_len; | |
452 | ||
453 | /* put the addr, length in | |
454 | * the IOC4 dma-table format */ | |
455 | *table = 0x0; | |
456 | table++; | |
457 | *table = cpu_to_be32(cur_addr); | |
458 | table++; | |
459 | *table = 0x0; | |
460 | table++; | |
461 | ||
0271fc2d | 462 | *table = cpu_to_be32(bcount); |
1da177e4 LT |
463 | table++; |
464 | ||
465 | cur_addr += bcount; | |
466 | cur_len -= bcount; | |
467 | } | |
468 | } | |
469 | ||
55c16a70 | 470 | sg = sg_next(sg); |
1da177e4 LT |
471 | i--; |
472 | } | |
473 | ||
474 | if (count) { | |
475 | table--; | |
476 | *table |= cpu_to_be32(0x80000000); | |
477 | return count; | |
478 | } | |
479 | ||
480 | use_pio_instead: | |
f6fb786d | 481 | ide_destroy_dmatable(drive); |
1da177e4 LT |
482 | |
483 | return 0; /* revert to PIO for this request */ | |
484 | } | |
485 | ||
22981694 | 486 | static int sgiioc4_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd) |
1da177e4 | 487 | { |
1da177e4 | 488 | int ddir; |
22981694 | 489 | u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE); |
1da177e4 | 490 | |
22981694 | 491 | if (sgiioc4_build_dmatable(drive, cmd) == 0) { |
1da177e4 | 492 | /* try PIO instead of DMA */ |
22981694 | 493 | ide_map_sg(drive, cmd); |
1da177e4 LT |
494 | return 1; |
495 | } | |
496 | ||
22981694 | 497 | if (write) |
1da177e4 LT |
498 | /* Writes TO the IOC4 FROM Main Memory */ |
499 | ddir = IOC4_DMA_READ; | |
500 | else | |
501 | /* Writes FROM the IOC4 TO Main Memory */ | |
502 | ddir = IOC4_DMA_WRITE; | |
503 | ||
504 | sgiioc4_configure_for_dma(ddir, drive); | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
374e042c BZ |
509 | static const struct ide_tp_ops sgiioc4_tp_ops = { |
510 | .exec_command = ide_exec_command, | |
511 | .read_status = sgiioc4_read_status, | |
512 | .read_altstatus = ide_read_altstatus, | |
374e042c BZ |
513 | |
514 | .set_irq = ide_set_irq, | |
515 | ||
516 | .tf_load = ide_tf_load, | |
517 | .tf_read = ide_tf_read, | |
518 | ||
519 | .input_data = ide_input_data, | |
520 | .output_data = ide_output_data, | |
521 | }; | |
522 | ||
ac95beed BZ |
523 | static const struct ide_port_ops sgiioc4_port_ops = { |
524 | .set_dma_mode = sgiioc4_set_dma_mode, | |
525 | /* reset DMA engine, clear IRQs */ | |
526 | .resetproc = sgiioc4_resetproc, | |
ac95beed BZ |
527 | }; |
528 | ||
f37afdac | 529 | static const struct ide_dma_ops sgiioc4_dma_ops = { |
5e37bdc0 BZ |
530 | .dma_host_set = sgiioc4_dma_host_set, |
531 | .dma_setup = sgiioc4_dma_setup, | |
532 | .dma_start = sgiioc4_dma_start, | |
533 | .dma_end = sgiioc4_dma_end, | |
534 | .dma_test_irq = sgiioc4_dma_test_irq, | |
535 | .dma_lost_irq = sgiioc4_dma_lost_irq, | |
536 | .dma_timeout = ide_dma_timeout, | |
537 | }; | |
538 | ||
ecdbc690 | 539 | static const struct ide_port_info sgiioc4_port_info __devinitconst = { |
eb3aff55 | 540 | .name = DRV_NAME, |
c413b9b9 | 541 | .chipset = ide_pci, |
04216fa1 | 542 | .init_dma = ide_dma_sgiioc4, |
374e042c | 543 | .tp_ops = &sgiioc4_tp_ops, |
ac95beed | 544 | .port_ops = &sgiioc4_port_ops, |
5e37bdc0 | 545 | .dma_ops = &sgiioc4_dma_ops, |
c5dd43ec | 546 | .host_flags = IDE_HFLAG_MMIO, |
255115fb | 547 | .irq_flags = IRQF_SHARED, |
c413b9b9 BZ |
548 | .mwdma_mask = ATA_MWDMA2_ONLY, |
549 | }; | |
550 | ||
1da177e4 | 551 | static int __devinit |
ca1997c1 | 552 | sgiioc4_ide_setup_pci_device(struct pci_dev *dev) |
1da177e4 | 553 | { |
04216fa1 | 554 | unsigned long cmd_base, irqport; |
1678df37 JK |
555 | unsigned long bar0, cmd_phys_base, ctl; |
556 | void __iomem *virt_base; | |
c97c6aca | 557 | hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL }; |
8a69580e | 558 | int rc; |
1da177e4 | 559 | |
1da177e4 | 560 | /* Get the CmdBlk and CtrlBlk Base Registers */ |
1678df37 | 561 | bar0 = pci_resource_start(dev, 0); |
28343562 | 562 | virt_base = pci_ioremap_bar(dev, 0); |
1678df37 JK |
563 | if (virt_base == NULL) { |
564 | printk(KERN_ERR "%s: Unable to remap BAR 0 address: 0x%lx\n", | |
ca1997c1 | 565 | DRV_NAME, bar0); |
1678df37 JK |
566 | return -ENOMEM; |
567 | } | |
568 | cmd_base = (unsigned long) virt_base + IOC4_CMD_OFFSET; | |
569 | ctl = (unsigned long) virt_base + IOC4_CTRL_OFFSET; | |
570 | irqport = (unsigned long) virt_base + IOC4_INTR_OFFSET; | |
1da177e4 | 571 | |
1678df37 | 572 | cmd_phys_base = bar0 + IOC4_CMD_OFFSET; |
9b5a18e1 SS |
573 | if (request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE, |
574 | DRV_NAME) == NULL) { | |
575 | printk(KERN_ERR "%s %s -- ERROR: addresses 0x%08lx to 0x%08lx " | |
576 | "already in use\n", DRV_NAME, pci_name(dev), | |
577 | cmd_phys_base, cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE); | |
3059ef99 SS |
578 | rc = -EBUSY; |
579 | goto req_mem_rgn_err; | |
1da177e4 LT |
580 | } |
581 | ||
8f8e8483 BZ |
582 | /* Initialize the IO registers */ |
583 | memset(&hw, 0, sizeof(hw)); | |
584 | sgiioc4_init_hwif_ports(&hw, cmd_base, ctl, irqport); | |
57c802e8 BZ |
585 | hw.irq = dev->irq; |
586 | hw.chipset = ide_pci; | |
587 | hw.dev = &dev->dev; | |
ce30e401 | 588 | |
1da177e4 | 589 | /* Initializing chipset IRQ Registers */ |
0ecdca26 | 590 | writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4)); |
1da177e4 | 591 | |
95a84cd1 SS |
592 | rc = ide_host_add(&sgiioc4_port_info, hws, NULL); |
593 | if (!rc) | |
594 | return 0; | |
1da177e4 | 595 | |
ce30e401 | 596 | release_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE); |
3059ef99 | 597 | req_mem_rgn_err: |
ce30e401 | 598 | iounmap(virt_base); |
8a69580e | 599 | return rc; |
1da177e4 LT |
600 | } |
601 | ||
602 | static unsigned int __devinit | |
ca1997c1 | 603 | pci_init_sgiioc4(struct pci_dev *dev) |
1da177e4 | 604 | { |
1da177e4 LT |
605 | int ret; |
606 | ||
1da177e4 | 607 | printk(KERN_INFO "%s: IDE controller at PCI slot %s, revision %d\n", |
fc212bb1 BZ |
608 | DRV_NAME, pci_name(dev), dev->revision); |
609 | ||
610 | if (dev->revision < IOC4_SUPPORTED_FIRMWARE_REV) { | |
1da177e4 | 611 | printk(KERN_ERR "Skipping %s IDE controller in slot %s: " |
ca1997c1 BZ |
612 | "firmware is obsolete - please upgrade to " |
613 | "revision46 or higher\n", | |
614 | DRV_NAME, pci_name(dev)); | |
1da177e4 LT |
615 | ret = -EAGAIN; |
616 | goto out; | |
617 | } | |
ca1997c1 | 618 | ret = sgiioc4_ide_setup_pci_device(dev); |
1da177e4 LT |
619 | out: |
620 | return ret; | |
621 | } | |
622 | ||
ecdbc690 | 623 | int __devinit |
22329b51 | 624 | ioc4_ide_attach_one(struct ioc4_driver_data *idd) |
1da177e4 | 625 | { |
f5befceb BC |
626 | /* PCI-RT does not bring out IDE connection. |
627 | * Do not attach to this particular IOC4. | |
628 | */ | |
629 | if (idd->idd_variant == IOC4_VARIANT_PCI_RT) | |
630 | return 0; | |
631 | ||
ca1997c1 | 632 | return pci_init_sgiioc4(idd->idd_pdev); |
1da177e4 LT |
633 | } |
634 | ||
ecdbc690 | 635 | static struct ioc4_submodule __devinitdata ioc4_ide_submodule = { |
22329b51 BC |
636 | .is_name = "IOC4_ide", |
637 | .is_owner = THIS_MODULE, | |
638 | .is_probe = ioc4_ide_attach_one, | |
639 | /* .is_remove = ioc4_ide_remove_one, */ | |
640 | }; | |
641 | ||
82ab1eec | 642 | static int __init ioc4_ide_init(void) |
22329b51 BC |
643 | { |
644 | return ioc4_register_submodule(&ioc4_ide_submodule); | |
645 | } | |
646 | ||
59f14800 | 647 | late_initcall(ioc4_ide_init); /* Call only after IDE init is done */ |
1da177e4 | 648 | |
a835fa79 | 649 | MODULE_AUTHOR("Aniket Malatpure/Jeremy Higdon"); |
1da177e4 LT |
650 | MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card"); |
651 | MODULE_LICENSE("GPL"); |