blob: 85ffaaa39b1b87eecc84e1f87a4d8911fdfa2dfd [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>
Brent Casavant22329b52005-06-21 17:15:59 -070032#include <linux/ioc4.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <asm/io.h>
34
35#include <linux/ide.h>
36
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +020037#define DRV_NAME "SGIIOC4"
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039/* IOC4 Specific Definitions */
40#define IOC4_CMD_OFFSET 0x100
41#define IOC4_CTRL_OFFSET 0x120
42#define IOC4_DMA_OFFSET 0x140
43#define IOC4_INTR_OFFSET 0x0
44
45#define IOC4_TIMING 0x00
46#define IOC4_DMA_PTR_L 0x01
47#define IOC4_DMA_PTR_H 0x02
48#define IOC4_DMA_ADDR_L 0x03
49#define IOC4_DMA_ADDR_H 0x04
50#define IOC4_BC_DEV 0x05
51#define IOC4_BC_MEM 0x06
52#define IOC4_DMA_CTRL 0x07
53#define IOC4_DMA_END_ADDR 0x08
54
55/* Bits in the IOC4 Control/Status Register */
56#define IOC4_S_DMA_START 0x01
57#define IOC4_S_DMA_STOP 0x02
58#define IOC4_S_DMA_DIR 0x04
59#define IOC4_S_DMA_ACTIVE 0x08
60#define IOC4_S_DMA_ERROR 0x10
61#define IOC4_ATA_MEMERR 0x02
62
63/* Read/Write Directions */
64#define IOC4_DMA_WRITE 0x04
65#define IOC4_DMA_READ 0x00
66
67/* Interrupt Register Offsets */
68#define IOC4_INTR_REG 0x03
69#define IOC4_INTR_SET 0x05
70#define IOC4_INTR_CLEAR 0x07
71
72#define IOC4_IDE_CACHELINE_SIZE 128
73#define IOC4_CMD_CTL_BLK_SIZE 0x20
74#define IOC4_SUPPORTED_FIRMWARE_REV 46
75
76typedef struct {
77 u32 timing_reg0;
78 u32 timing_reg1;
79 u32 low_mem_ptr;
80 u32 high_mem_ptr;
81 u32 low_mem_addr;
82 u32 high_mem_addr;
83 u32 dev_byte_count;
84 u32 mem_byte_count;
85 u32 status;
86} ioc4_dma_regs_t;
87
88/* Each Physical Region Descriptor Entry size is 16 bytes (2 * 64 bits) */
89/* IOC4 has only 1 IDE channel */
90#define IOC4_PRD_BYTES 16
91#define IOC4_PRD_ENTRIES (PAGE_SIZE /(4*IOC4_PRD_BYTES))
92
93
94static void
95sgiioc4_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
96 unsigned long ctrl_port, unsigned long irq_port)
97{
98 unsigned long reg = data_port;
99 int i;
100
101 /* Registers are word (32 bit) aligned */
102 for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
103 hw->io_ports[i] = reg + i * 4;
104
105 if (ctrl_port)
106 hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
107
108 if (irq_port)
109 hw->io_ports[IDE_IRQ_OFFSET] = irq_port;
110}
111
112static void
113sgiioc4_maskproc(ide_drive_t * drive, int mask)
114{
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100115 writeb(mask ? (drive->ctl | 2) : (drive->ctl & ~2),
116 (void __iomem *)IDE_CONTROL_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117}
118
119
120static int
121sgiioc4_checkirq(ide_hwif_t * hwif)
122{
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100123 unsigned long intr_addr =
124 hwif->io_ports[IDE_IRQ_OFFSET] + IOC4_INTR_REG * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100126 if ((u8)readl((void __iomem *)intr_addr) & 0x03)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 return 1;
128
129 return 0;
130}
131
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100132static u8 sgiioc4_INB(unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134static int
135sgiioc4_clearirq(ide_drive_t * drive)
136{
137 u32 intr_reg;
138 ide_hwif_t *hwif = HWIF(drive);
139 unsigned long other_ir =
140 hwif->io_ports[IDE_IRQ_OFFSET] + (IOC4_INTR_REG << 2);
141
142 /* Code to check for PCI error conditions */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100143 intr_reg = readl((void __iomem *)other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 if (intr_reg & 0x03) { /* Valid IOC4-IDE interrupt */
145 /*
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100146 * Using sgiioc4_INB to read the IDE_STATUS_REG has a side effect
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 * of clearing the interrupt. The first read should clear it
148 * if it is set. The second read should return a "clear" status
149 * if it got cleared. If not, then spin for a bit trying to
150 * clear it.
151 */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100152 u8 stat = sgiioc4_INB(IDE_STATUS_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 int count = 0;
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100154 stat = sgiioc4_INB(IDE_STATUS_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 while ((stat & 0x80) && (count++ < 100)) {
156 udelay(1);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100157 stat = sgiioc4_INB(IDE_STATUS_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 }
159
160 if (intr_reg & 0x02) {
161 /* Error when transferring DMA data on PCI bus */
162 u32 pci_err_addr_low, pci_err_addr_high,
163 pci_stat_cmd_reg;
164
165 pci_err_addr_low =
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100166 readl((void __iomem *)hwif->io_ports[IDE_IRQ_OFFSET]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 pci_err_addr_high =
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100168 readl((void __iomem *)(hwif->io_ports[IDE_IRQ_OFFSET] + 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 pci_read_config_dword(hwif->pci_dev, PCI_COMMAND,
170 &pci_stat_cmd_reg);
171 printk(KERN_ERR
172 "%s(%s) : PCI Bus Error when doing DMA:"
173 " status-cmd reg is 0x%x\n",
174 __FUNCTION__, drive->name, pci_stat_cmd_reg);
175 printk(KERN_ERR
176 "%s(%s) : PCI Error Address is 0x%x%x\n",
177 __FUNCTION__, drive->name,
178 pci_err_addr_high, pci_err_addr_low);
179 /* Clear the PCI Error indicator */
180 pci_write_config_dword(hwif->pci_dev, PCI_COMMAND,
181 0x00000146);
182 }
183
184 /* Clear the Interrupt, Error bits on the IOC4 */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100185 writel(0x03, (void __iomem *)other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100187 intr_reg = readl((void __iomem *)other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 }
189
190 return intr_reg & 3;
191}
192
193static void sgiioc4_ide_dma_start(ide_drive_t * drive)
194{
195 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100196 unsigned long ioc4_dma_addr = hwif->dma_base + IOC4_DMA_CTRL * 4;
197 unsigned int reg = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 unsigned int temp_reg = reg | IOC4_S_DMA_START;
199
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100200 writel(temp_reg, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201}
202
203static u32
204sgiioc4_ide_dma_stop(ide_hwif_t *hwif, u64 dma_base)
205{
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100206 unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 u32 ioc4_dma;
208 int count;
209
210 count = 0;
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100211 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 while ((ioc4_dma & IOC4_S_DMA_STOP) && (count++ < 200)) {
213 udelay(1);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100214 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 }
216 return ioc4_dma;
217}
218
219/* Stops the IOC4 DMA Engine */
220static int
221sgiioc4_ide_dma_end(ide_drive_t * drive)
222{
223 u32 ioc4_dma, bc_dev, bc_mem, num, valid = 0, cnt = 0;
224 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100225 unsigned long dma_base = hwif->dma_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 int dma_stat = 0;
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700227 unsigned long *ending_dma = ide_get_hwifdata(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100229 writel(IOC4_S_DMA_STOP, (void __iomem *)(dma_base + IOC4_DMA_CTRL * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
231 ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
232
233 if (ioc4_dma & IOC4_S_DMA_STOP) {
234 printk(KERN_ERR
235 "%s(%s): IOC4 DMA STOP bit is still 1 :"
236 "ioc4_dma_reg 0x%x\n",
237 __FUNCTION__, drive->name, ioc4_dma);
238 dma_stat = 1;
239 }
240
241 /*
242 * The IOC4 will DMA 1's to the ending dma area to indicate that
243 * previous data DMA is complete. This is necessary because of relaxed
244 * ordering between register reads and DMA writes on the Altix.
245 */
246 while ((cnt++ < 200) && (!valid)) {
247 for (num = 0; num < 16; num++) {
248 if (ending_dma[num]) {
249 valid = 1;
250 break;
251 }
252 }
253 udelay(1);
254 }
255 if (!valid) {
256 printk(KERN_ERR "%s(%s) : DMA incomplete\n", __FUNCTION__,
257 drive->name);
258 dma_stat = 1;
259 }
260
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100261 bc_dev = readl((void __iomem *)(dma_base + IOC4_BC_DEV * 4));
262 bc_mem = readl((void __iomem *)(dma_base + IOC4_BC_MEM * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
264 if ((bc_dev & 0x01FF) || (bc_mem & 0x1FF)) {
265 if (bc_dev > bc_mem + 8) {
266 printk(KERN_ERR
267 "%s(%s): WARNING!! byte_count_dev %d "
268 "!= byte_count_mem %d\n",
269 __FUNCTION__, drive->name, bc_dev, bc_mem);
270 }
271 }
272
273 drive->waiting_for_dma = 0;
274 ide_destroy_dmatable(drive);
275
276 return dma_stat;
277}
278
279static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280sgiioc4_ide_dma_on(ide_drive_t * drive)
281{
282 drive->using_dma = 1;
283
Bartlomiej Zolnierkiewiczccf35282007-02-17 02:40:26 +0100284 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285}
286
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100287static void sgiioc4_dma_off_quietly(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288{
289 drive->using_dma = 0;
290
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100291 drive->hwif->dma_host_off(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292}
293
Bartlomiej Zolnierkiewicz88b2b322007-10-13 17:47:51 +0200294static void sgiioc4_set_dma_mode(ide_drive_t *drive, const u8 speed)
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200295{
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200296}
297
Bartlomiej Zolnierkiewicz9ef57912007-02-17 02:40:26 +0100298static int sgiioc4_ide_dma_check(ide_drive_t *drive)
299{
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200300 if (ide_tune_dma(drive))
Bartlomiej Zolnierkiewicz3608b5d2007-02-17 02:40:26 +0100301 return 0;
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200302
303 /*
304 * ->set_pio_mode is not implemented currently
305 * so this is just for the completness
306 */
307 ide_set_max_pio(drive);
308
309 return -1;
Bartlomiej Zolnierkiewicz9ef57912007-02-17 02:40:26 +0100310}
311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312/* returns 1 if dma irq issued, 0 otherwise */
313static int
314sgiioc4_ide_dma_test_irq(ide_drive_t * drive)
315{
316 return sgiioc4_checkirq(HWIF(drive));
317}
318
Bartlomiej Zolnierkiewiczccf35282007-02-17 02:40:26 +0100319static void sgiioc4_dma_host_on(ide_drive_t * drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321}
322
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100323static void sgiioc4_dma_host_off(ide_drive_t * drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324{
325 sgiioc4_clearirq(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326}
327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328static void
329sgiioc4_resetproc(ide_drive_t * drive)
330{
331 sgiioc4_ide_dma_end(drive);
332 sgiioc4_clearirq(drive);
333}
334
Sergei Shtylyov841d2a92007-07-09 23:17:54 +0200335static void
336sgiioc4_dma_lost_irq(ide_drive_t * drive)
337{
338 sgiioc4_resetproc(drive);
339
340 ide_dma_lost_irq(drive);
341}
342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343static u8
344sgiioc4_INB(unsigned long port)
345{
Jeremy Higdona835fa72006-05-30 21:27:07 -0700346 u8 reg = (u8) readb((void __iomem *) port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
348 if ((port & 0xFFF) == 0x11C) { /* Status register of IOC4 */
349 if (reg & 0x51) { /* Not busy...check for interrupt */
350 unsigned long other_ir = port - 0x110;
Jeremy Higdona835fa72006-05-30 21:27:07 -0700351 unsigned int intr_reg = (u32) readl((void __iomem *) other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
353 /* Clear the Interrupt, Error bits on the IOC4 */
354 if (intr_reg & 0x03) {
Jeremy Higdona835fa72006-05-30 21:27:07 -0700355 writel(0x03, (void __iomem *) other_ir);
356 intr_reg = (u32) readl((void __iomem *) other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 }
358 }
359 }
360
361 return reg;
362}
363
364/* Creates a dma map for the scatter-gather list entries */
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200365static int __devinit
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366ide_dma_sgiioc4(ide_hwif_t * hwif, unsigned long dma_base)
367{
John Keller1678df32006-08-31 21:27:51 -0700368 void __iomem *virt_dma_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 int num_ports = sizeof (ioc4_dma_regs_t);
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700370 void *pad;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
372 printk(KERN_INFO "%s: BM-DMA at 0x%04lx-0x%04lx\n", hwif->name,
373 dma_base, dma_base + num_ports - 1);
374
John Keller1678df32006-08-31 21:27:51 -0700375 if (!request_mem_region(dma_base, num_ports, hwif->name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 printk(KERN_ERR
377 "%s(%s) -- ERROR, Addresses 0x%p to 0x%p "
378 "ALREADY in use\n",
379 __FUNCTION__, hwif->name, (void *) dma_base,
380 (void *) dma_base + num_ports - 1);
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200381 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 }
383
John Keller1678df32006-08-31 21:27:51 -0700384 virt_dma_base = ioremap(dma_base, num_ports);
385 if (virt_dma_base == NULL) {
386 printk(KERN_ERR
387 "%s(%s) -- ERROR, Unable to map addresses 0x%lx to 0x%lx\n",
388 __FUNCTION__, hwif->name, dma_base, dma_base + num_ports - 1);
389 goto dma_remap_failure;
390 }
391 hwif->dma_base = (unsigned long) virt_dma_base;
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev,
394 IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
395 &hwif->dmatable_dma);
396
397 if (!hwif->dmatable_cpu)
John Keller1678df32006-08-31 21:27:51 -0700398 goto dma_pci_alloc_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
400 hwif->sg_max_nents = IOC4_PRD_ENTRIES;
401
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700402 pad = pci_alloc_consistent(hwif->pci_dev, IOC4_IDE_CACHELINE_SIZE,
403 (dma_addr_t *) &(hwif->dma_status));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700405 if (pad) {
406 ide_set_hwifdata(hwif, pad);
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200407 return 0;
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700408 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 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
John Keller1678df32006-08-31 21:27:51 -0700419dma_pci_alloc_failure:
420 iounmap(virt_dma_base);
421
422dma_remap_failure:
423 release_mem_region(dma_base, num_ports);
424
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200425 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426}
427
428/* Initializes the IOC4 DMA Engine */
429static void
430sgiioc4_configure_for_dma(int dma_direction, ide_drive_t * drive)
431{
432 u32 ioc4_dma;
433 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100434 unsigned long dma_base = hwif->dma_base;
435 unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 u32 dma_addr, ending_dma_addr;
437
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100438 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
440 if (ioc4_dma & IOC4_S_DMA_ACTIVE) {
441 printk(KERN_WARNING
442 "%s(%s):Warning!! DMA from previous transfer was still active\n",
443 __FUNCTION__, drive->name);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100444 writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
446
447 if (ioc4_dma & IOC4_S_DMA_STOP)
448 printk(KERN_ERR
449 "%s(%s) : IOC4 Dma STOP bit is still 1\n",
450 __FUNCTION__, drive->name);
451 }
452
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100453 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 if (ioc4_dma & IOC4_S_DMA_ERROR) {
455 printk(KERN_WARNING
456 "%s(%s) : Warning!! - DMA Error during Previous"
457 " transfer | status 0x%x\n",
458 __FUNCTION__, drive->name, ioc4_dma);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100459 writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
461
462 if (ioc4_dma & IOC4_S_DMA_STOP)
463 printk(KERN_ERR
464 "%s(%s) : IOC4 DMA STOP bit is still 1\n",
465 __FUNCTION__, drive->name);
466 }
467
468 /* Address of the Scatter Gather List */
469 dma_addr = cpu_to_le32(hwif->dmatable_dma);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100470 writel(dma_addr, (void __iomem *)(dma_base + IOC4_DMA_PTR_L * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
472 /* Address of the Ending DMA */
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700473 memset(ide_get_hwifdata(hwif), 0, IOC4_IDE_CACHELINE_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 ending_dma_addr = cpu_to_le32(hwif->dma_status);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100475 writel(ending_dma_addr, (void __iomem *)(dma_base + IOC4_DMA_END_ADDR * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100477 writel(dma_direction, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 drive->waiting_for_dma = 1;
479}
480
481/* IOC4 Scatter Gather list Format */
482/* 128 Bit entries to support 64 bit addresses in the future */
483/* The Scatter Gather list Entry should be in the BIG-ENDIAN Format */
484/* --------------------------------------------------------------------- */
485/* | Upper 32 bits - Zero | Lower 32 bits- address | */
486/* --------------------------------------------------------------------- */
487/* | Upper 32 bits - Zero |EOL| 15 unused | 16 Bit Length| */
488/* --------------------------------------------------------------------- */
489/* Creates the scatter gather list, DMA Table */
490static unsigned int
491sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir)
492{
493 ide_hwif_t *hwif = HWIF(drive);
494 unsigned int *table = hwif->dmatable_cpu;
495 unsigned int count = 0, i = 1;
496 struct scatterlist *sg;
497
498 hwif->sg_nents = i = ide_build_sglist(drive, rq);
499
500 if (!i)
501 return 0; /* sglist of length Zero */
502
503 sg = hwif->sg_table;
504 while (i && sg_dma_len(sg)) {
505 dma_addr_t cur_addr;
506 int cur_len;
507 cur_addr = sg_dma_address(sg);
508 cur_len = sg_dma_len(sg);
509
510 while (cur_len) {
511 if (count++ >= IOC4_PRD_ENTRIES) {
512 printk(KERN_WARNING
513 "%s: DMA table too small\n",
514 drive->name);
515 goto use_pio_instead;
516 } else {
Jeremy Higdon0271fc22006-02-02 00:00:46 -0800517 u32 bcount =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 0x10000 - (cur_addr & 0xffff);
519
520 if (bcount > cur_len)
521 bcount = cur_len;
522
523 /* put the addr, length in
524 * the IOC4 dma-table format */
525 *table = 0x0;
526 table++;
527 *table = cpu_to_be32(cur_addr);
528 table++;
529 *table = 0x0;
530 table++;
531
Jeremy Higdon0271fc22006-02-02 00:00:46 -0800532 *table = cpu_to_be32(bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 table++;
534
535 cur_addr += bcount;
536 cur_len -= bcount;
537 }
538 }
539
540 sg++;
541 i--;
542 }
543
544 if (count) {
545 table--;
546 *table |= cpu_to_be32(0x80000000);
547 return count;
548 }
549
550use_pio_instead:
551 pci_unmap_sg(hwif->pci_dev, hwif->sg_table, hwif->sg_nents,
552 hwif->sg_dma_direction);
553
554 return 0; /* revert to PIO for this request */
555}
556
557static int sgiioc4_ide_dma_setup(ide_drive_t *drive)
558{
559 struct request *rq = HWGROUP(drive)->rq;
560 unsigned int count = 0;
561 int ddir;
562
563 if (rq_data_dir(rq))
564 ddir = PCI_DMA_TODEVICE;
565 else
566 ddir = PCI_DMA_FROMDEVICE;
567
568 if (!(count = sgiioc4_build_dma_table(drive, rq, ddir))) {
569 /* try PIO instead of DMA */
570 ide_map_sg(drive, rq);
571 return 1;
572 }
573
574 if (rq_data_dir(rq))
575 /* Writes TO the IOC4 FROM Main Memory */
576 ddir = IOC4_DMA_READ;
577 else
578 /* Writes FROM the IOC4 TO Main Memory */
579 ddir = IOC4_DMA_WRITE;
580
581 sgiioc4_configure_for_dma(ddir, drive);
582
583 return 0;
584}
585
586static void __devinit
587ide_init_sgiioc4(ide_hwif_t * hwif)
588{
Bartlomiej Zolnierkiewicz2ad1e552007-02-17 02:40:25 +0100589 hwif->mmio = 1;
Bartlomiej Zolnierkiewicz4099d142007-07-20 01:11:59 +0200590 hwif->pio_mask = 0x00;
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200591 hwif->set_pio_mode = NULL; /* Sets timing for PIO mode */
Bartlomiej Zolnierkiewicz88b2b322007-10-13 17:47:51 +0200592 hwif->set_dma_mode = &sgiioc4_set_dma_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 hwif->selectproc = NULL;/* Use the default routine to select drive */
594 hwif->reset_poll = NULL;/* No HBA specific reset_poll needed */
595 hwif->pre_reset = NULL; /* No HBA specific pre_set needed */
596 hwif->resetproc = &sgiioc4_resetproc;/* Reset DMA engine,
597 clear interrupts */
598 hwif->intrproc = NULL; /* Enable or Disable interrupt from drive */
599 hwif->maskproc = &sgiioc4_maskproc; /* Mask on/off NIEN register */
600 hwif->quirkproc = NULL;
601 hwif->busproc = NULL;
602
Bartlomiej Zolnierkiewiczb9d9e612007-10-13 17:47:52 +0200603 hwif->INB = &sgiioc4_INB;
604
605 if (hwif->dma_base == 0)
606 return;
607
608 hwif->atapi_dma = 1;
609 hwif->mwdma_mask = 0x04;
610
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 hwif->dma_setup = &sgiioc4_ide_dma_setup;
612 hwif->dma_start = &sgiioc4_ide_dma_start;
613 hwif->ide_dma_end = &sgiioc4_ide_dma_end;
614 hwif->ide_dma_check = &sgiioc4_ide_dma_check;
615 hwif->ide_dma_on = &sgiioc4_ide_dma_on;
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100616 hwif->dma_off_quietly = &sgiioc4_dma_off_quietly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617 hwif->ide_dma_test_irq = &sgiioc4_ide_dma_test_irq;
Bartlomiej Zolnierkiewiczccf35282007-02-17 02:40:26 +0100618 hwif->dma_host_on = &sgiioc4_dma_host_on;
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100619 hwif->dma_host_off = &sgiioc4_dma_host_off;
Sergei Shtylyov841d2a92007-07-09 23:17:54 +0200620 hwif->dma_lost_irq = &sgiioc4_dma_lost_irq;
Sergei Shtylyovc283f5d2007-07-09 23:17:54 +0200621 hwif->dma_timeout = &ide_dma_timeout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622}
623
624static int __devinit
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200625sgiioc4_ide_setup_pci_device(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626{
John Keller1678df32006-08-31 21:27:51 -0700627 unsigned long cmd_base, dma_base, irqport;
628 unsigned long bar0, cmd_phys_base, ctl;
629 void __iomem *virt_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630 ide_hwif_t *hwif;
631 int h;
632
Jeremy Higdondeb5e5c2005-12-15 02:10:35 +0100633 /*
634 * Find an empty HWIF; if none available, return -ENOMEM.
635 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 for (h = 0; h < MAX_HWIFS; ++h) {
637 hwif = &ide_hwifs[h];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 if (hwif->chipset == ide_unknown)
639 break;
640 }
Jeremy Higdondeb5e5c2005-12-15 02:10:35 +0100641 if (h == MAX_HWIFS) {
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200642 printk(KERN_ERR "%s: too many IDE interfaces, no room in table\n",
643 DRV_NAME);
Jeremy Higdondeb5e5c2005-12-15 02:10:35 +0100644 return -ENOMEM;
645 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646
647 /* Get the CmdBlk and CtrlBlk Base Registers */
John Keller1678df32006-08-31 21:27:51 -0700648 bar0 = pci_resource_start(dev, 0);
649 virt_base = ioremap(bar0, pci_resource_len(dev, 0));
650 if (virt_base == NULL) {
651 printk(KERN_ERR "%s: Unable to remap BAR 0 address: 0x%lx\n",
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200652 DRV_NAME, bar0);
John Keller1678df32006-08-31 21:27:51 -0700653 return -ENOMEM;
654 }
655 cmd_base = (unsigned long) virt_base + IOC4_CMD_OFFSET;
656 ctl = (unsigned long) virt_base + IOC4_CTRL_OFFSET;
657 irqport = (unsigned long) virt_base + IOC4_INTR_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET;
659
John Keller1678df32006-08-31 21:27:51 -0700660 cmd_phys_base = bar0 + IOC4_CMD_OFFSET;
661 if (!request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE,
662 hwif->name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 printk(KERN_ERR
John Keller1678df32006-08-31 21:27:51 -0700664 "%s : %s -- ERROR, Addresses "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 "0x%p to 0x%p ALREADY in use\n",
John Keller1678df32006-08-31 21:27:51 -0700666 __FUNCTION__, hwif->name, (void *) cmd_phys_base,
667 (void *) cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 return -ENOMEM;
669 }
670
John Keller1678df32006-08-31 21:27:51 -0700671 if (hwif->io_ports[IDE_DATA_OFFSET] != cmd_base) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 /* Initialize the IO registers */
John Keller1678df32006-08-31 21:27:51 -0700673 sgiioc4_init_hwif_ports(&hwif->hw, cmd_base, ctl, irqport);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 memcpy(hwif->io_ports, hwif->hw.io_ports,
675 sizeof (hwif->io_ports));
676 hwif->noprobe = !hwif->io_ports[IDE_DATA_OFFSET];
677 }
678
679 hwif->irq = dev->irq;
680 hwif->chipset = ide_pci;
681 hwif->pci_dev = dev;
682 hwif->channel = 0; /* Single Channel chip */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 hwif->gendev.parent = &dev->dev;/* setup proper ancestral information */
684
John Keller1678df32006-08-31 21:27:51 -0700685 /* The IOC4 uses MMIO rather than Port IO. */
686 default_hwif_mmiops(hwif);
687
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 /* Initializing chipset IRQ Registers */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100689 writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200691 hwif->autodma = 0;
692
693 if (dma_base && ide_dma_sgiioc4(hwif, dma_base) == 0) {
694 hwif->autodma = 1;
695 hwif->drives[1].autodma = hwif->drives[0].autodma = 1;
696 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 printk(KERN_INFO "%s: %s Bus-Master DMA disabled\n",
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200698 hwif->name, DRV_NAME);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
Bartlomiej Zolnierkiewiczb9d9e612007-10-13 17:47:52 +0200700 ide_init_sgiioc4(hwif);
701
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 if (probe_hwif_init(hwif))
703 return -EIO;
704
705 /* Create /proc/ide entries */
Bartlomiej Zolnierkiewicz5cbf79c2007-05-10 00:01:11 +0200706 ide_proc_register_port(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
708 return 0;
709}
710
711static unsigned int __devinit
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200712pci_init_sgiioc4(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713{
714 unsigned int class_rev;
715 int ret;
716
717 pci_read_config_dword(dev, PCI_CLASS_REVISION, &class_rev);
718 class_rev &= 0xff;
719 printk(KERN_INFO "%s: IDE controller at PCI slot %s, revision %d\n",
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200720 DRV_NAME, pci_name(dev), class_rev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 if (class_rev < IOC4_SUPPORTED_FIRMWARE_REV) {
722 printk(KERN_ERR "Skipping %s IDE controller in slot %s: "
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200723 "firmware is obsolete - please upgrade to "
724 "revision46 or higher\n",
725 DRV_NAME, pci_name(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 ret = -EAGAIN;
727 goto out;
728 }
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200729 ret = sgiioc4_ide_setup_pci_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730out:
731 return ret;
732}
733
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734int
Brent Casavant22329b52005-06-21 17:15:59 -0700735ioc4_ide_attach_one(struct ioc4_driver_data *idd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736{
Brent Casavantf5befce2006-06-23 02:05:52 -0700737 /* PCI-RT does not bring out IDE connection.
738 * Do not attach to this particular IOC4.
739 */
740 if (idd->idd_variant == IOC4_VARIANT_PCI_RT)
741 return 0;
742
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200743 return pci_init_sgiioc4(idd->idd_pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744}
745
Brent Casavant22329b52005-06-21 17:15:59 -0700746static struct ioc4_submodule ioc4_ide_submodule = {
747 .is_name = "IOC4_ide",
748 .is_owner = THIS_MODULE,
749 .is_probe = ioc4_ide_attach_one,
750/* .is_remove = ioc4_ide_remove_one, */
751};
752
Bartlomiej Zolnierkiewicz82ab1ee2007-01-27 13:46:56 +0100753static int __init ioc4_ide_init(void)
Brent Casavant22329b52005-06-21 17:15:59 -0700754{
755 return ioc4_register_submodule(&ioc4_ide_submodule);
756}
757
Brent Casavant59f14802006-10-17 00:09:25 -0700758late_initcall(ioc4_ide_init); /* Call only after IDE init is done */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
Jeremy Higdona835fa72006-05-30 21:27:07 -0700760MODULE_AUTHOR("Aniket Malatpure/Jeremy Higdon");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card");
762MODULE_LICENSE("GPL");