blob: f6d4b4136a89f36e29408485dd309ca46b887123 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jeremy Higdon0271fc22006-02-02 00:00:46 -08002 * Copyright (c) 2003-2006 Silicon Graphics, Inc. All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 * 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>
Jens Axboe55c16a72007-07-25 08:13:56 +020032#include <linux/scatterlist.h>
Brent Casavant22329b52005-06-21 17:15:59 -070033#include <linux/ioc4.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <asm/io.h>
35
36#include <linux/ide.h>
37
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +020038#define DRV_NAME "SGIIOC4"
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040/* IOC4 Specific Definitions */
41#define IOC4_CMD_OFFSET 0x100
42#define IOC4_CTRL_OFFSET 0x120
43#define IOC4_DMA_OFFSET 0x140
44#define IOC4_INTR_OFFSET 0x0
45
46#define IOC4_TIMING 0x00
47#define IOC4_DMA_PTR_L 0x01
48#define IOC4_DMA_PTR_H 0x02
49#define IOC4_DMA_ADDR_L 0x03
50#define IOC4_DMA_ADDR_H 0x04
51#define IOC4_BC_DEV 0x05
52#define IOC4_BC_MEM 0x06
53#define IOC4_DMA_CTRL 0x07
54#define IOC4_DMA_END_ADDR 0x08
55
56/* Bits in the IOC4 Control/Status Register */
57#define IOC4_S_DMA_START 0x01
58#define IOC4_S_DMA_STOP 0x02
59#define IOC4_S_DMA_DIR 0x04
60#define IOC4_S_DMA_ACTIVE 0x08
61#define IOC4_S_DMA_ERROR 0x10
62#define IOC4_ATA_MEMERR 0x02
63
64/* Read/Write Directions */
65#define IOC4_DMA_WRITE 0x04
66#define IOC4_DMA_READ 0x00
67
68/* Interrupt Register Offsets */
69#define IOC4_INTR_REG 0x03
70#define IOC4_INTR_SET 0x05
71#define IOC4_INTR_CLEAR 0x07
72
73#define IOC4_IDE_CACHELINE_SIZE 128
74#define IOC4_CMD_CTL_BLK_SIZE 0x20
75#define IOC4_SUPPORTED_FIRMWARE_REV 46
76
77typedef struct {
78 u32 timing_reg0;
79 u32 timing_reg1;
80 u32 low_mem_ptr;
81 u32 high_mem_ptr;
82 u32 low_mem_addr;
83 u32 high_mem_addr;
84 u32 dev_byte_count;
85 u32 mem_byte_count;
86 u32 status;
87} ioc4_dma_regs_t;
88
89/* Each Physical Region Descriptor Entry size is 16 bytes (2 * 64 bits) */
90/* IOC4 has only 1 IDE channel */
91#define IOC4_PRD_BYTES 16
92#define IOC4_PRD_ENTRIES (PAGE_SIZE /(4*IOC4_PRD_BYTES))
93
94
95static void
96sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
97 unsigned long ctrl_port, unsigned long irq_port)
98{
99 unsigned long reg = data_port;
100 int i;
101
102 /* Registers are word (32 bit) aligned */
103 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
104 hw->io_ports[i] = reg + i * 4;
105
106 if (ctrl_port)
107 hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
108
109 if (irq_port)
110 hw->io_ports[IDE_IRQ_OFFSET] = irq_port;
111}
112
113static void
114sgiioc4_maskproc(ide_drive_t * drive, int mask)
115{
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100116 writeb(mask ? (drive->ctl | 2) : (drive->ctl & ~2),
117 (void __iomem *)IDE_CONTROL_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118}
119
120
121static int
122sgiioc4_checkirq(ide_hwif_t * hwif)
123{
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100124 unsigned long intr_addr =
125 hwif->io_ports[IDE_IRQ_OFFSET] + IOC4_INTR_REG * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100127 if ((u8)readl((void __iomem *)intr_addr) & 0x03)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 return 1;
129
130 return 0;
131}
132
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100133static u8 sgiioc4_INB(unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135static int
136sgiioc4_clearirq(ide_drive_t * drive)
137{
138 u32 intr_reg;
139 ide_hwif_t *hwif = HWIF(drive);
140 unsigned long other_ir =
141 hwif->io_ports[IDE_IRQ_OFFSET] + (IOC4_INTR_REG << 2);
142
143 /* Code to check for PCI error conditions */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100144 intr_reg = readl((void __iomem *)other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 if (intr_reg & 0x03) { /* Valid IOC4-IDE interrupt */
146 /*
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100147 * Using sgiioc4_INB to read the IDE_STATUS_REG has a side effect
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 * of clearing the interrupt. The first read should clear it
149 * if it is set. The second read should return a "clear" status
150 * if it got cleared. If not, then spin for a bit trying to
151 * clear it.
152 */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100153 u8 stat = sgiioc4_INB(IDE_STATUS_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 int count = 0;
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100155 stat = sgiioc4_INB(IDE_STATUS_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 while ((stat & 0x80) && (count++ < 100)) {
157 udelay(1);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100158 stat = sgiioc4_INB(IDE_STATUS_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 }
160
161 if (intr_reg & 0x02) {
162 /* Error when transferring DMA data on PCI bus */
163 u32 pci_err_addr_low, pci_err_addr_high,
164 pci_stat_cmd_reg;
165
166 pci_err_addr_low =
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100167 readl((void __iomem *)hwif->io_ports[IDE_IRQ_OFFSET]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 pci_err_addr_high =
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100169 readl((void __iomem *)(hwif->io_ports[IDE_IRQ_OFFSET] + 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 pci_read_config_dword(hwif->pci_dev, PCI_COMMAND,
171 &pci_stat_cmd_reg);
172 printk(KERN_ERR
173 "%s(%s) : PCI Bus Error when doing DMA:"
174 " status-cmd reg is 0x%x\n",
175 __FUNCTION__, drive->name, pci_stat_cmd_reg);
176 printk(KERN_ERR
177 "%s(%s) : PCI Error Address is 0x%x%x\n",
178 __FUNCTION__, drive->name,
179 pci_err_addr_high, pci_err_addr_low);
180 /* Clear the PCI Error indicator */
181 pci_write_config_dword(hwif->pci_dev, PCI_COMMAND,
182 0x00000146);
183 }
184
185 /* Clear the Interrupt, Error bits on the IOC4 */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100186 writel(0x03, (void __iomem *)other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100188 intr_reg = readl((void __iomem *)other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 }
190
191 return intr_reg & 3;
192}
193
194static void sgiioc4_ide_dma_start(ide_drive_t * drive)
195{
196 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100197 unsigned long ioc4_dma_addr = hwif->dma_base + IOC4_DMA_CTRL * 4;
198 unsigned int reg = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 unsigned int temp_reg = reg | IOC4_S_DMA_START;
200
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100201 writel(temp_reg, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202}
203
204static u32
205sgiioc4_ide_dma_stop(ide_hwif_t *hwif, u64 dma_base)
206{
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100207 unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 u32 ioc4_dma;
209 int count;
210
211 count = 0;
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100212 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 while ((ioc4_dma & IOC4_S_DMA_STOP) && (count++ < 200)) {
214 udelay(1);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100215 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 }
217 return ioc4_dma;
218}
219
220/* Stops the IOC4 DMA Engine */
221static int
222sgiioc4_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);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100226 unsigned long dma_base = hwif->dma_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 int dma_stat = 0;
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700228 unsigned long *ending_dma = ide_get_hwifdata(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100230 writel(IOC4_S_DMA_STOP, (void __iomem *)(dma_base + IOC4_DMA_CTRL * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
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
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100262 bc_dev = readl((void __iomem *)(dma_base + IOC4_BC_DEV * 4));
263 bc_mem = readl((void __iomem *)(dma_base + IOC4_BC_MEM * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
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
280static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281sgiioc4_ide_dma_on(ide_drive_t * drive)
282{
283 drive->using_dma = 1;
284
Bartlomiej Zolnierkiewiczccf35282007-02-17 02:40:26 +0100285 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286}
287
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100288static void sgiioc4_dma_off_quietly(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
290 drive->using_dma = 0;
291
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100292 drive->hwif->dma_host_off(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293}
294
Bartlomiej Zolnierkiewicz88b2b322007-10-13 17:47:51 +0200295static void sgiioc4_set_dma_mode(ide_drive_t *drive, const u8 speed)
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200296{
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200297}
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299/* returns 1 if dma irq issued, 0 otherwise */
300static int
301sgiioc4_ide_dma_test_irq(ide_drive_t * drive)
302{
303 return sgiioc4_checkirq(HWIF(drive));
304}
305
Bartlomiej Zolnierkiewiczccf35282007-02-17 02:40:26 +0100306static void sgiioc4_dma_host_on(ide_drive_t * drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308}
309
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100310static void sgiioc4_dma_host_off(ide_drive_t * drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311{
312 sgiioc4_clearirq(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313}
314
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315static void
316sgiioc4_resetproc(ide_drive_t * drive)
317{
318 sgiioc4_ide_dma_end(drive);
319 sgiioc4_clearirq(drive);
320}
321
Sergei Shtylyov841d2a92007-07-09 23:17:54 +0200322static void
323sgiioc4_dma_lost_irq(ide_drive_t * drive)
324{
325 sgiioc4_resetproc(drive);
326
327 ide_dma_lost_irq(drive);
328}
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330static u8
331sgiioc4_INB(unsigned long port)
332{
Jeremy Higdona835fa72006-05-30 21:27:07 -0700333 u8 reg = (u8) readb((void __iomem *) port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335 if ((port & 0xFFF) == 0x11C) { /* Status register of IOC4 */
336 if (reg & 0x51) { /* Not busy...check for interrupt */
337 unsigned long other_ir = port - 0x110;
Jeremy Higdona835fa72006-05-30 21:27:07 -0700338 unsigned int intr_reg = (u32) readl((void __iomem *) other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 /* Clear the Interrupt, Error bits on the IOC4 */
341 if (intr_reg & 0x03) {
Jeremy Higdona835fa72006-05-30 21:27:07 -0700342 writel(0x03, (void __iomem *) other_ir);
343 intr_reg = (u32) readl((void __iomem *) other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 }
345 }
346 }
347
348 return reg;
349}
350
351/* Creates a dma map for the scatter-gather list entries */
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200352static int __devinit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353ide_dma_sgiioc4(ide_hwif_t * hwif, unsigned long dma_base)
354{
John Keller1678df32006-08-31 21:27:51 -0700355 void __iomem *virt_dma_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 int num_ports = sizeof (ioc4_dma_regs_t);
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700357 void *pad;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
359 printk(KERN_INFO "%s: BM-DMA at 0x%04lx-0x%04lx\n", hwif->name,
360 dma_base, dma_base + num_ports - 1);
361
John Keller1678df32006-08-31 21:27:51 -0700362 if (!request_mem_region(dma_base, num_ports, hwif->name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 printk(KERN_ERR
364 "%s(%s) -- ERROR, Addresses 0x%p to 0x%p "
365 "ALREADY in use\n",
366 __FUNCTION__, hwif->name, (void *) dma_base,
367 (void *) dma_base + num_ports - 1);
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200368 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 }
370
John Keller1678df32006-08-31 21:27:51 -0700371 virt_dma_base = ioremap(dma_base, num_ports);
372 if (virt_dma_base == NULL) {
373 printk(KERN_ERR
374 "%s(%s) -- ERROR, Unable to map addresses 0x%lx to 0x%lx\n",
375 __FUNCTION__, hwif->name, dma_base, dma_base + num_ports - 1);
376 goto dma_remap_failure;
377 }
378 hwif->dma_base = (unsigned long) virt_dma_base;
379
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
381 IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
382 &hwif->dmatable_dma);
383
384 if (!hwif->dmatable_cpu)
John Keller1678df32006-08-31 21:27:51 -0700385 goto dma_pci_alloc_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
387 hwif->sg_max_nents = IOC4_PRD_ENTRIES;
388
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700389 pad = pci_alloc_consistent(hwif->pci_dev, IOC4_IDE_CACHELINE_SIZE,
390 (dma_addr_t *) &(hwif->dma_status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700392 if (pad) {
393 ide_set_hwifdata(hwif, pad);
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200394 return 0;
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700395 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 pci_free_consistent(hwif->pci_dev,
398 IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
399 hwif->dmatable_cpu, hwif->dmatable_dma);
400 printk(KERN_INFO
401 "%s() -- Error! Unable to allocate DMA Maps for drive %s\n",
402 __FUNCTION__, hwif->name);
403 printk(KERN_INFO
404 "Changing from DMA to PIO mode for Drive %s\n", hwif->name);
405
John Keller1678df32006-08-31 21:27:51 -0700406dma_pci_alloc_failure:
407 iounmap(virt_dma_base);
408
409dma_remap_failure:
410 release_mem_region(dma_base, num_ports);
411
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200412 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413}
414
415/* Initializes the IOC4 DMA Engine */
416static void
417sgiioc4_configure_for_dma(int dma_direction, ide_drive_t * drive)
418{
419 u32 ioc4_dma;
420 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100421 unsigned long dma_base = hwif->dma_base;
422 unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 u32 dma_addr, ending_dma_addr;
424
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100425 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
427 if (ioc4_dma & IOC4_S_DMA_ACTIVE) {
428 printk(KERN_WARNING
429 "%s(%s):Warning!! DMA from previous transfer was still active\n",
430 __FUNCTION__, drive->name);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100431 writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
433
434 if (ioc4_dma & IOC4_S_DMA_STOP)
435 printk(KERN_ERR
436 "%s(%s) : IOC4 Dma STOP bit is still 1\n",
437 __FUNCTION__, drive->name);
438 }
439
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100440 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 if (ioc4_dma & IOC4_S_DMA_ERROR) {
442 printk(KERN_WARNING
443 "%s(%s) : Warning!! - DMA Error during Previous"
444 " transfer | status 0x%x\n",
445 __FUNCTION__, drive->name, ioc4_dma);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100446 writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
448
449 if (ioc4_dma & IOC4_S_DMA_STOP)
450 printk(KERN_ERR
451 "%s(%s) : IOC4 DMA STOP bit is still 1\n",
452 __FUNCTION__, drive->name);
453 }
454
455 /* Address of the Scatter Gather List */
456 dma_addr = cpu_to_le32(hwif->dmatable_dma);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100457 writel(dma_addr, (void __iomem *)(dma_base + IOC4_DMA_PTR_L * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
459 /* Address of the Ending DMA */
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700460 memset(ide_get_hwifdata(hwif), 0, IOC4_IDE_CACHELINE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 ending_dma_addr = cpu_to_le32(hwif->dma_status);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100462 writel(ending_dma_addr, (void __iomem *)(dma_base + IOC4_DMA_END_ADDR * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100464 writel(dma_direction, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 drive->waiting_for_dma = 1;
466}
467
468/* IOC4 Scatter Gather list Format */
469/* 128 Bit entries to support 64 bit addresses in the future */
470/* The Scatter Gather list Entry should be in the BIG-ENDIAN Format */
471/* --------------------------------------------------------------------- */
472/* | Upper 32 bits - Zero | Lower 32 bits- address | */
473/* --------------------------------------------------------------------- */
474/* | Upper 32 bits - Zero |EOL| 15 unused | 16 Bit Length| */
475/* --------------------------------------------------------------------- */
476/* Creates the scatter gather list, DMA Table */
477static unsigned int
478sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir)
479{
480 ide_hwif_t *hwif = HWIF(drive);
481 unsigned int *table = hwif->dmatable_cpu;
482 unsigned int count = 0, i = 1;
483 struct scatterlist *sg;
484
485 hwif->sg_nents = i = ide_build_sglist(drive, rq);
486
487 if (!i)
488 return 0; /* sglist of length Zero */
489
490 sg = hwif->sg_table;
491 while (i && sg_dma_len(sg)) {
492 dma_addr_t cur_addr;
493 int cur_len;
494 cur_addr = sg_dma_address(sg);
495 cur_len = sg_dma_len(sg);
496
497 while (cur_len) {
498 if (count++ >= IOC4_PRD_ENTRIES) {
499 printk(KERN_WARNING
500 "%s: DMA table too small\n",
501 drive->name);
502 goto use_pio_instead;
503 } else {
Jeremy Higdon0271fc22006-02-02 00:00:46 -0800504 u32 bcount =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 0x10000 - (cur_addr & 0xffff);
506
507 if (bcount > cur_len)
508 bcount = cur_len;
509
510 /* put the addr, length in
511 * the IOC4 dma-table format */
512 *table = 0x0;
513 table++;
514 *table = cpu_to_be32(cur_addr);
515 table++;
516 *table = 0x0;
517 table++;
518
Jeremy Higdon0271fc22006-02-02 00:00:46 -0800519 *table = cpu_to_be32(bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 table++;
521
522 cur_addr += bcount;
523 cur_len -= bcount;
524 }
525 }
526
Jens Axboe55c16a72007-07-25 08:13:56 +0200527 sg = sg_next(sg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 i--;
529 }
530
531 if (count) {
532 table--;
533 *table |= cpu_to_be32(0x80000000);
534 return count;
535 }
536
537use_pio_instead:
538 pci_unmap_sg(hwif->pci_dev, hwif->sg_table, hwif->sg_nents,
539 hwif->sg_dma_direction);
540
541 return 0; /* revert to PIO for this request */
542}
543
544static int sgiioc4_ide_dma_setup(ide_drive_t *drive)
545{
546 struct request *rq = HWGROUP(drive)->rq;
547 unsigned int count = 0;
548 int ddir;
549
550 if (rq_data_dir(rq))
551 ddir = PCI_DMA_TODEVICE;
552 else
553 ddir = PCI_DMA_FROMDEVICE;
554
555 if (!(count = sgiioc4_build_dma_table(drive, rq, ddir))) {
556 /* try PIO instead of DMA */
557 ide_map_sg(drive, rq);
558 return 1;
559 }
560
561 if (rq_data_dir(rq))
562 /* Writes TO the IOC4 FROM Main Memory */
563 ddir = IOC4_DMA_READ;
564 else
565 /* Writes FROM the IOC4 TO Main Memory */
566 ddir = IOC4_DMA_WRITE;
567
568 sgiioc4_configure_for_dma(ddir, drive);
569
570 return 0;
571}
572
573static void __devinit
574ide_init_sgiioc4(ide_hwif_t * hwif)
575{
Bartlomiej Zolnierkiewicz2ad1e552007-02-17 02:40:25 +0100576 hwif->mmio = 1;
Bartlomiej Zolnierkiewicz4099d142007-07-20 01:11:59 +0200577 hwif->pio_mask = 0x00;
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200578 hwif->set_pio_mode = NULL; /* Sets timing for PIO mode */
Bartlomiej Zolnierkiewicz88b2b322007-10-13 17:47:51 +0200579 hwif->set_dma_mode = &sgiioc4_set_dma_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 hwif->selectproc = NULL;/* Use the default routine to select drive */
581 hwif->reset_poll = NULL;/* No HBA specific reset_poll needed */
582 hwif->pre_reset = NULL; /* No HBA specific pre_set needed */
583 hwif->resetproc = &sgiioc4_resetproc;/* Reset DMA engine,
584 clear interrupts */
585 hwif->intrproc = NULL; /* Enable or Disable interrupt from drive */
586 hwif->maskproc = &sgiioc4_maskproc; /* Mask on/off NIEN register */
587 hwif->quirkproc = NULL;
588 hwif->busproc = NULL;
589
Bartlomiej Zolnierkiewiczb9d9e612007-10-13 17:47:52 +0200590 hwif->INB = &sgiioc4_INB;
591
592 if (hwif->dma_base == 0)
593 return;
594
Bartlomiej Zolnierkiewicz5f8b6c32007-10-19 00:30:07 +0200595 hwif->mwdma_mask = ATA_MWDMA2_ONLY;
Bartlomiej Zolnierkiewiczb9d9e612007-10-13 17:47:52 +0200596
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 hwif->dma_setup = &sgiioc4_ide_dma_setup;
598 hwif->dma_start = &sgiioc4_ide_dma_start;
599 hwif->ide_dma_end = &sgiioc4_ide_dma_end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 hwif->ide_dma_on = &sgiioc4_ide_dma_on;
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100601 hwif->dma_off_quietly = &sgiioc4_dma_off_quietly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 hwif->ide_dma_test_irq = &sgiioc4_ide_dma_test_irq;
Bartlomiej Zolnierkiewiczccf35282007-02-17 02:40:26 +0100603 hwif->dma_host_on = &sgiioc4_dma_host_on;
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100604 hwif->dma_host_off = &sgiioc4_dma_host_off;
Sergei Shtylyov841d2a92007-07-09 23:17:54 +0200605 hwif->dma_lost_irq = &sgiioc4_dma_lost_irq;
Sergei Shtylyovc283f5d2007-07-09 23:17:54 +0200606 hwif->dma_timeout = &ide_dma_timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607}
608
609static int __devinit
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200610sgiioc4_ide_setup_pci_device(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611{
John Keller1678df32006-08-31 21:27:51 -0700612 unsigned long cmd_base, dma_base, irqport;
613 unsigned long bar0, cmd_phys_base, ctl;
614 void __iomem *virt_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 ide_hwif_t *hwif;
616 int h;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200617 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Jeremy Higdondeb5e5c2005-12-15 02:10:35 +0100619 /*
620 * Find an empty HWIF; if none available, return -ENOMEM.
621 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 for (h = 0; h < MAX_HWIFS; ++h) {
623 hwif = &ide_hwifs[h];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 if (hwif->chipset == ide_unknown)
625 break;
626 }
Jeremy Higdondeb5e5c2005-12-15 02:10:35 +0100627 if (h == MAX_HWIFS) {
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200628 printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n",
629 DRV_NAME);
Jeremy Higdondeb5e5c2005-12-15 02:10:35 +0100630 return -ENOMEM;
631 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
633 /* Get the CmdBlk and CtrlBlk Base Registers */
John Keller1678df32006-08-31 21:27:51 -0700634 bar0 = pci_resource_start(dev, 0);
635 virt_base = ioremap(bar0, pci_resource_len(dev, 0));
636 if (virt_base == NULL) {
637 printk(KERN_ERR "%s: Unable to remap BAR 0 address: 0x%lx\n",
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200638 DRV_NAME, bar0);
John Keller1678df32006-08-31 21:27:51 -0700639 return -ENOMEM;
640 }
641 cmd_base = (unsigned long) virt_base + IOC4_CMD_OFFSET;
642 ctl = (unsigned long) virt_base + IOC4_CTRL_OFFSET;
643 irqport = (unsigned long) virt_base + IOC4_INTR_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET;
645
John Keller1678df32006-08-31 21:27:51 -0700646 cmd_phys_base = bar0 + IOC4_CMD_OFFSET;
647 if (!request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE,
648 hwif->name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 printk(KERN_ERR
John Keller1678df32006-08-31 21:27:51 -0700650 "%s : %s -- ERROR, Addresses "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 "0x%p to 0x%p ALREADY in use\n",
John Keller1678df32006-08-31 21:27:51 -0700652 __FUNCTION__, hwif->name, (void *) cmd_phys_base,
653 (void *) cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 return -ENOMEM;
655 }
656
John Keller1678df32006-08-31 21:27:51 -0700657 if (hwif->io_ports[IDE_DATA_OFFSET] != cmd_base) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 /* Initialize the IO registers */
John Keller1678df32006-08-31 21:27:51 -0700659 sgiioc4_init_hwif_ports(&hwif->hw, cmd_base, ctl, irqport);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 memcpy(hwif->io_ports, hwif->hw.io_ports,
661 sizeof (hwif->io_ports));
662 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
663 }
664
665 hwif->irq = dev->irq;
666 hwif->chipset = ide_pci;
667 hwif->pci_dev = dev;
668 hwif->channel = 0; /* Single Channel chip */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 hwif->gendev.parent = &dev->dev;/* setup proper ancestral information */
670
John Keller1678df32006-08-31 21:27:51 -0700671 /* The IOC4 uses MMIO rather than Port IO. */
672 default_hwif_mmiops(hwif);
673
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 /* Initializing chipset IRQ Registers */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100675 writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676
Bartlomiej Zolnierkiewicz9ff6f722007-10-16 22:29:58 +0200677 if (dma_base == 0 || ide_dma_sgiioc4(hwif, dma_base))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 printk(KERN_INFO "%s: %s Bus-Master DMA disabled\n",
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200679 hwif->name, DRV_NAME);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680
Bartlomiej Zolnierkiewiczb9d9e612007-10-13 17:47:52 +0200681 ide_init_sgiioc4(hwif);
682
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200683 idx[0] = hwif->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200685 if (ide_device_add(idx))
686 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
688 return 0;
689}
690
691static unsigned int __devinit
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200692pci_init_sgiioc4(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694 int ret;
695
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 printk(KERN_INFO "%s: IDE controller at PCI slot %s, revision %d\n",
Bartlomiej Zolnierkiewiczfc212bb2007-10-19 00:30:08 +0200697 DRV_NAME, pci_name(dev), dev->revision);
698
699 if (dev->revision < IOC4_SUPPORTED_FIRMWARE_REV) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 printk(KERN_ERR "Skipping %s IDE controller in slot %s: "
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200701 "firmware is obsolete - please upgrade to "
702 "revision46 or higher\n",
703 DRV_NAME, pci_name(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 ret = -EAGAIN;
705 goto out;
706 }
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200707 ret = sgiioc4_ide_setup_pci_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708out:
709 return ret;
710}
711
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712int
Brent Casavant22329b52005-06-21 17:15:59 -0700713ioc4_ide_attach_one(struct ioc4_driver_data *idd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714{
Brent Casavantf5befce2006-06-23 02:05:52 -0700715 /* PCI-RT does not bring out IDE connection.
716 * Do not attach to this particular IOC4.
717 */
718 if (idd->idd_variant == IOC4_VARIANT_PCI_RT)
719 return 0;
720
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200721 return pci_init_sgiioc4(idd->idd_pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722}
723
Brent Casavant22329b52005-06-21 17:15:59 -0700724static struct ioc4_submodule ioc4_ide_submodule = {
725 .is_name = "IOC4_ide",
726 .is_owner = THIS_MODULE,
727 .is_probe = ioc4_ide_attach_one,
728/* .is_remove = ioc4_ide_remove_one, */
729};
730
Bartlomiej Zolnierkiewicz82ab1ee2007-01-27 13:46:56 +0100731static int __init ioc4_ide_init(void)
Brent Casavant22329b52005-06-21 17:15:59 -0700732{
733 return ioc4_register_submodule(&ioc4_ide_submodule);
734}
735
Brent Casavant59f14802006-10-17 00:09:25 -0700736late_initcall(ioc4_ide_init); /* Call only after IDE init is done */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
Jeremy Higdona835fa72006-05-30 21:27:07 -0700738MODULE_AUTHOR("Aniket Malatpure/Jeremy Higdon");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card");
740MODULE_LICENSE("GPL");