blob: 76afa1f9c59952241621fd89523e46d324f85549 [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/ioport.h>
29#include <linux/blkdev.h>
Jens Axboe55c16a72007-07-25 08:13:56 +020030#include <linux/scatterlist.h>
Brent Casavant22329b52005-06-21 17:15:59 -070031#include <linux/ioc4.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/io.h>
33
34#include <linux/ide.h>
35
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +020036#define DRV_NAME "SGIIOC4"
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038/* 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
75typedef 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
93static void
94sgiioc4_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 */
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200101 for (i = 0; i <= 7; i++)
102 hw->io_ports_array[i] = reg + i * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104 if (ctrl_port)
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200105 hw->io_ports.ctl_addr = ctrl_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
107 if (irq_port)
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200108 hw->io_ports.irq_addr = irq_port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109}
110
111static void
112sgiioc4_maskproc(ide_drive_t * drive, int mask)
113{
Bartlomiej Zolnierkiewiczff074882008-07-15 21:21:50 +0200114 writeb(ATA_DEVCTL_OBS | (mask ? 2 : 0),
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200115 (void __iomem *)drive->hwif->io_ports.ctl_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116}
117
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118static int
119sgiioc4_checkirq(ide_hwif_t * hwif)
120{
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100121 unsigned long intr_addr =
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200122 hwif->io_ports.irq_addr + IOC4_INTR_REG * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100124 if ((u8)readl((void __iomem *)intr_addr) & 0x03)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 return 1;
126
127 return 0;
128}
129
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100130static u8 sgiioc4_INB(unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131
132static int
133sgiioc4_clearirq(ide_drive_t * drive)
134{
135 u32 intr_reg;
136 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200137 struct ide_io_ports *io_ports = &hwif->io_ports;
138 unsigned long other_ir = io_ports->irq_addr + (IOC4_INTR_REG << 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
140 /* Code to check for PCI error conditions */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100141 intr_reg = readl((void __iomem *)other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 if (intr_reg & 0x03) { /* Valid IOC4-IDE interrupt */
143 /*
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200144 * Using sgiioc4_INB to read the Status register has a side
145 * effect of clearing the interrupt. The first read should
146 * clear it if it is set. The second read should return
147 * a "clear" status if it got cleared. If not, then spin
148 * for a bit trying to clear it.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 */
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200150 u8 stat = sgiioc4_INB(io_ports->status_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 int count = 0;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200152 stat = sgiioc4_INB(io_ports->status_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 while ((stat & 0x80) && (count++ < 100)) {
154 udelay(1);
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200155 stat = sgiioc4_INB(io_ports->status_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 }
157
158 if (intr_reg & 0x02) {
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100159 struct pci_dev *dev = to_pci_dev(hwif->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 /* Error when transferring DMA data on PCI bus */
161 u32 pci_err_addr_low, pci_err_addr_high,
162 pci_stat_cmd_reg;
163
164 pci_err_addr_low =
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200165 readl((void __iomem *)io_ports->irq_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 pci_err_addr_high =
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200167 readl((void __iomem *)(io_ports->irq_addr + 4));
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100168 pci_read_config_dword(dev, PCI_COMMAND,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 &pci_stat_cmd_reg);
170 printk(KERN_ERR
171 "%s(%s) : PCI Bus Error when doing DMA:"
172 " status-cmd reg is 0x%x\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200173 __func__, drive->name, pci_stat_cmd_reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 printk(KERN_ERR
175 "%s(%s) : PCI Error Address is 0x%x%x\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200176 __func__, drive->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 pci_err_addr_high, pci_err_addr_low);
178 /* Clear the PCI Error indicator */
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100179 pci_write_config_dword(dev, PCI_COMMAND, 0x00000146);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 }
181
182 /* Clear the Interrupt, Error bits on the IOC4 */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100183 writel(0x03, (void __iomem *)other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100185 intr_reg = readl((void __iomem *)other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 }
187
188 return intr_reg & 3;
189}
190
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200191static void sgiioc4_dma_start(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192{
193 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100194 unsigned long ioc4_dma_addr = hwif->dma_base + IOC4_DMA_CTRL * 4;
195 unsigned int reg = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 unsigned int temp_reg = reg | IOC4_S_DMA_START;
197
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100198 writel(temp_reg, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199}
200
201static u32
202sgiioc4_ide_dma_stop(ide_hwif_t *hwif, u64 dma_base)
203{
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100204 unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 u32 ioc4_dma;
206 int count;
207
208 count = 0;
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100209 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 while ((ioc4_dma & IOC4_S_DMA_STOP) && (count++ < 200)) {
211 udelay(1);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100212 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 }
214 return ioc4_dma;
215}
216
217/* Stops the IOC4 DMA Engine */
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200218static int sgiioc4_dma_end(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219{
220 u32 ioc4_dma, bc_dev, bc_mem, num, valid = 0, cnt = 0;
221 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100222 unsigned long dma_base = hwif->dma_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 int dma_stat = 0;
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700224 unsigned long *ending_dma = ide_get_hwifdata(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100226 writel(IOC4_S_DMA_STOP, (void __iomem *)(dma_base + IOC4_DMA_CTRL * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
228 ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
229
230 if (ioc4_dma & IOC4_S_DMA_STOP) {
231 printk(KERN_ERR
232 "%s(%s): IOC4 DMA STOP bit is still 1 :"
233 "ioc4_dma_reg 0x%x\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200234 __func__, drive->name, ioc4_dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 dma_stat = 1;
236 }
237
238 /*
239 * The IOC4 will DMA 1's to the ending dma area to indicate that
240 * previous data DMA is complete. This is necessary because of relaxed
241 * ordering between register reads and DMA writes on the Altix.
242 */
243 while ((cnt++ < 200) && (!valid)) {
244 for (num = 0; num < 16; num++) {
245 if (ending_dma[num]) {
246 valid = 1;
247 break;
248 }
249 }
250 udelay(1);
251 }
252 if (!valid) {
Harvey Harrisoneb639632008-04-26 22:25:20 +0200253 printk(KERN_ERR "%s(%s) : DMA incomplete\n", __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 drive->name);
255 dma_stat = 1;
256 }
257
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100258 bc_dev = readl((void __iomem *)(dma_base + IOC4_BC_DEV * 4));
259 bc_mem = readl((void __iomem *)(dma_base + IOC4_BC_MEM * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261 if ((bc_dev & 0x01FF) || (bc_mem & 0x1FF)) {
262 if (bc_dev > bc_mem + 8) {
263 printk(KERN_ERR
264 "%s(%s): WARNING!! byte_count_dev %d "
265 "!= byte_count_mem %d\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200266 __func__, drive->name, bc_dev, bc_mem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 }
268 }
269
270 drive->waiting_for_dma = 0;
271 ide_destroy_dmatable(drive);
272
273 return dma_stat;
274}
275
Bartlomiej Zolnierkiewicz88b2b322007-10-13 17:47:51 +0200276static void sgiioc4_set_dma_mode(ide_drive_t *drive, const u8 speed)
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200277{
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200278}
279
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280/* returns 1 if dma irq issued, 0 otherwise */
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200281static int sgiioc4_dma_test_irq(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
283 return sgiioc4_checkirq(HWIF(drive));
284}
285
Bartlomiej Zolnierkiewicz15ce9262008-01-26 20:13:03 +0100286static void sgiioc4_dma_host_set(ide_drive_t *drive, int on)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287{
Bartlomiej Zolnierkiewicz15ce9262008-01-26 20:13:03 +0100288 if (!on)
289 sgiioc4_clearirq(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290}
291
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292static void
293sgiioc4_resetproc(ide_drive_t * drive)
294{
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200295 sgiioc4_dma_end(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 sgiioc4_clearirq(drive);
297}
298
Sergei Shtylyov841d2a92007-07-09 23:17:54 +0200299static void
300sgiioc4_dma_lost_irq(ide_drive_t * drive)
301{
302 sgiioc4_resetproc(drive);
303
304 ide_dma_lost_irq(drive);
305}
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307static u8
308sgiioc4_INB(unsigned long port)
309{
Jeremy Higdona835fa72006-05-30 21:27:07 -0700310 u8 reg = (u8) readb((void __iomem *) port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
312 if ((port & 0xFFF) == 0x11C) { /* Status register of IOC4 */
313 if (reg & 0x51) { /* Not busy...check for interrupt */
314 unsigned long other_ir = port - 0x110;
Jeremy Higdona835fa72006-05-30 21:27:07 -0700315 unsigned int intr_reg = (u32) readl((void __iomem *) other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316
317 /* Clear the Interrupt, Error bits on the IOC4 */
318 if (intr_reg & 0x03) {
Jeremy Higdona835fa72006-05-30 21:27:07 -0700319 writel(0x03, (void __iomem *) other_ir);
320 intr_reg = (u32) readl((void __iomem *) other_ir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 }
322 }
323 }
324
325 return reg;
326}
327
328/* Creates a dma map for the scatter-gather list entries */
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200329static int __devinit
Bartlomiej Zolnierkiewicz04216fa2008-04-26 22:25:23 +0200330ide_dma_sgiioc4(ide_hwif_t *hwif, const struct ide_port_info *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331{
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100332 struct pci_dev *dev = to_pci_dev(hwif->dev);
Bartlomiej Zolnierkiewicz04216fa2008-04-26 22:25:23 +0200333 unsigned long dma_base = pci_resource_start(dev, 0) + IOC4_DMA_OFFSET;
John Keller1678df32006-08-31 21:27:51 -0700334 void __iomem *virt_dma_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 int num_ports = sizeof (ioc4_dma_regs_t);
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700336 void *pad;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
Bartlomiej Zolnierkiewicz04216fa2008-04-26 22:25:23 +0200338 if (dma_base == 0)
339 return -1;
340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 printk(KERN_INFO "%s: BM-DMA at 0x%04lx-0x%04lx\n", hwif->name,
342 dma_base, dma_base + num_ports - 1);
343
John Keller1678df32006-08-31 21:27:51 -0700344 if (!request_mem_region(dma_base, num_ports, hwif->name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 printk(KERN_ERR
346 "%s(%s) -- ERROR, Addresses 0x%p to 0x%p "
347 "ALREADY in use\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200348 __func__, hwif->name, (void *) dma_base,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 (void *) dma_base + num_ports - 1);
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200350 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 }
352
John Keller1678df32006-08-31 21:27:51 -0700353 virt_dma_base = ioremap(dma_base, num_ports);
354 if (virt_dma_base == NULL) {
355 printk(KERN_ERR
356 "%s(%s) -- ERROR, Unable to map addresses 0x%lx to 0x%lx\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200357 __func__, hwif->name, dma_base, dma_base + num_ports - 1);
John Keller1678df32006-08-31 21:27:51 -0700358 goto dma_remap_failure;
359 }
360 hwif->dma_base = (unsigned long) virt_dma_base;
361
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100362 hwif->dmatable_cpu = pci_alloc_consistent(dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363 IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
364 &hwif->dmatable_dma);
365
366 if (!hwif->dmatable_cpu)
John Keller1678df32006-08-31 21:27:51 -0700367 goto dma_pci_alloc_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
369 hwif->sg_max_nents = IOC4_PRD_ENTRIES;
370
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100371 pad = pci_alloc_consistent(dev, IOC4_IDE_CACHELINE_SIZE,
Bartlomiej Zolnierkiewicz912ef6d2008-07-15 21:21:47 +0200372 (dma_addr_t *)&hwif->extra_base);
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700373 if (pad) {
374 ide_set_hwifdata(hwif, pad);
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200375 return 0;
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700376 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100378 pci_free_consistent(dev, IOC4_PRD_ENTRIES * IOC4_PRD_BYTES,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 hwif->dmatable_cpu, hwif->dmatable_dma);
380 printk(KERN_INFO
381 "%s() -- Error! Unable to allocate DMA Maps for drive %s\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200382 __func__, hwif->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 printk(KERN_INFO
384 "Changing from DMA to PIO mode for Drive %s\n", hwif->name);
385
John Keller1678df32006-08-31 21:27:51 -0700386dma_pci_alloc_failure:
387 iounmap(virt_dma_base);
388
389dma_remap_failure:
390 release_mem_region(dma_base, num_ports);
391
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200392 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393}
394
395/* Initializes the IOC4 DMA Engine */
396static void
397sgiioc4_configure_for_dma(int dma_direction, ide_drive_t * drive)
398{
399 u32 ioc4_dma;
400 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100401 unsigned long dma_base = hwif->dma_base;
402 unsigned long ioc4_dma_addr = dma_base + IOC4_DMA_CTRL * 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 u32 dma_addr, ending_dma_addr;
404
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100405 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
407 if (ioc4_dma & IOC4_S_DMA_ACTIVE) {
408 printk(KERN_WARNING
409 "%s(%s):Warning!! DMA from previous transfer was still active\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200410 __func__, drive->name);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100411 writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
413
414 if (ioc4_dma & IOC4_S_DMA_STOP)
415 printk(KERN_ERR
416 "%s(%s) : IOC4 Dma STOP bit is still 1\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200417 __func__, drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 }
419
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100420 ioc4_dma = readl((void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 if (ioc4_dma & IOC4_S_DMA_ERROR) {
422 printk(KERN_WARNING
423 "%s(%s) : Warning!! - DMA Error during Previous"
424 " transfer | status 0x%x\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200425 __func__, drive->name, ioc4_dma);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100426 writel(IOC4_S_DMA_STOP, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 ioc4_dma = sgiioc4_ide_dma_stop(hwif, dma_base);
428
429 if (ioc4_dma & IOC4_S_DMA_STOP)
430 printk(KERN_ERR
431 "%s(%s) : IOC4 DMA STOP bit is still 1\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200432 __func__, drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 }
434
435 /* Address of the Scatter Gather List */
436 dma_addr = cpu_to_le32(hwif->dmatable_dma);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100437 writel(dma_addr, (void __iomem *)(dma_base + IOC4_DMA_PTR_L * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439 /* Address of the Ending DMA */
Sergei Shtylyov3f63c5e2006-10-03 01:14:25 -0700440 memset(ide_get_hwifdata(hwif), 0, IOC4_IDE_CACHELINE_SIZE);
Bartlomiej Zolnierkiewicz912ef6d2008-07-15 21:21:47 +0200441 ending_dma_addr = cpu_to_le32(hwif->extra_base);
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100442 writel(ending_dma_addr, (void __iomem *)(dma_base + IOC4_DMA_END_ADDR * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100444 writel(dma_direction, (void __iomem *)ioc4_dma_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 drive->waiting_for_dma = 1;
446}
447
448/* IOC4 Scatter Gather list Format */
449/* 128 Bit entries to support 64 bit addresses in the future */
450/* The Scatter Gather list Entry should be in the BIG-ENDIAN Format */
451/* --------------------------------------------------------------------- */
452/* | Upper 32 bits - Zero | Lower 32 bits- address | */
453/* --------------------------------------------------------------------- */
454/* | Upper 32 bits - Zero |EOL| 15 unused | 16 Bit Length| */
455/* --------------------------------------------------------------------- */
456/* Creates the scatter gather list, DMA Table */
457static unsigned int
458sgiioc4_build_dma_table(ide_drive_t * drive, struct request *rq, int ddir)
459{
460 ide_hwif_t *hwif = HWIF(drive);
461 unsigned int *table = hwif->dmatable_cpu;
462 unsigned int count = 0, i = 1;
463 struct scatterlist *sg;
464
465 hwif->sg_nents = i = ide_build_sglist(drive, rq);
466
467 if (!i)
468 return 0; /* sglist of length Zero */
469
470 sg = hwif->sg_table;
471 while (i && sg_dma_len(sg)) {
472 dma_addr_t cur_addr;
473 int cur_len;
474 cur_addr = sg_dma_address(sg);
475 cur_len = sg_dma_len(sg);
476
477 while (cur_len) {
478 if (count++ >= IOC4_PRD_ENTRIES) {
479 printk(KERN_WARNING
480 "%s: DMA table too small\n",
481 drive->name);
482 goto use_pio_instead;
483 } else {
Jeremy Higdon0271fc22006-02-02 00:00:46 -0800484 u32 bcount =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 0x10000 - (cur_addr & 0xffff);
486
487 if (bcount > cur_len)
488 bcount = cur_len;
489
490 /* put the addr, length in
491 * the IOC4 dma-table format */
492 *table = 0x0;
493 table++;
494 *table = cpu_to_be32(cur_addr);
495 table++;
496 *table = 0x0;
497 table++;
498
Jeremy Higdon0271fc22006-02-02 00:00:46 -0800499 *table = cpu_to_be32(bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 table++;
501
502 cur_addr += bcount;
503 cur_len -= bcount;
504 }
505 }
506
Jens Axboe55c16a72007-07-25 08:13:56 +0200507 sg = sg_next(sg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 i--;
509 }
510
511 if (count) {
512 table--;
513 *table |= cpu_to_be32(0x80000000);
514 return count;
515 }
516
517use_pio_instead:
Bartlomiej Zolnierkiewiczf6fb7862008-02-01 23:09:31 +0100518 ide_destroy_dmatable(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520 return 0; /* revert to PIO for this request */
521}
522
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200523static int sgiioc4_dma_setup(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524{
525 struct request *rq = HWGROUP(drive)->rq;
526 unsigned int count = 0;
527 int ddir;
528
529 if (rq_data_dir(rq))
530 ddir = PCI_DMA_TODEVICE;
531 else
532 ddir = PCI_DMA_FROMDEVICE;
533
534 if (!(count = sgiioc4_build_dma_table(drive, rq, ddir))) {
535 /* try PIO instead of DMA */
536 ide_map_sg(drive, rq);
537 return 1;
538 }
539
540 if (rq_data_dir(rq))
541 /* Writes TO the IOC4 FROM Main Memory */
542 ddir = IOC4_DMA_READ;
543 else
544 /* Writes FROM the IOC4 TO Main Memory */
545 ddir = IOC4_DMA_WRITE;
546
547 sgiioc4_configure_for_dma(ddir, drive);
548
549 return 0;
550}
551
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200552static const struct ide_port_ops sgiioc4_port_ops = {
553 .set_dma_mode = sgiioc4_set_dma_mode,
554 /* reset DMA engine, clear IRQs */
555 .resetproc = sgiioc4_resetproc,
556 /* mask on/off NIEN register */
557 .maskproc = sgiioc4_maskproc,
558};
559
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +0200560static const struct ide_dma_ops sgiioc4_dma_ops = {
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200561 .dma_host_set = sgiioc4_dma_host_set,
562 .dma_setup = sgiioc4_dma_setup,
563 .dma_start = sgiioc4_dma_start,
564 .dma_end = sgiioc4_dma_end,
565 .dma_test_irq = sgiioc4_dma_test_irq,
566 .dma_lost_irq = sgiioc4_dma_lost_irq,
567 .dma_timeout = ide_dma_timeout,
568};
569
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100570static const struct ide_port_info sgiioc4_port_info __devinitdata = {
Bartlomiej Zolnierkiewiczeb3aff52008-07-16 20:33:42 +0200571 .name = DRV_NAME,
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100572 .chipset = ide_pci,
Bartlomiej Zolnierkiewicz04216fa2008-04-26 22:25:23 +0200573 .init_dma = ide_dma_sgiioc4,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200574 .port_ops = &sgiioc4_port_ops,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200575 .dma_ops = &sgiioc4_dma_ops,
Bartlomiej Zolnierkiewiczc5dd43e2008-04-28 23:44:37 +0200576 .host_flags = IDE_HFLAG_MMIO,
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100577 .mwdma_mask = ATA_MWDMA2_ONLY,
578};
579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580static int __devinit
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200581sgiioc4_ide_setup_pci_device(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582{
Bartlomiej Zolnierkiewicz04216fa2008-04-26 22:25:23 +0200583 unsigned long cmd_base, irqport;
John Keller1678df32006-08-31 21:27:51 -0700584 unsigned long bar0, cmd_phys_base, ctl;
585 void __iomem *virt_base;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +0200587 hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200588 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100589 struct ide_port_info d = sgiioc4_port_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591 /* Get the CmdBlk and CtrlBlk Base Registers */
John Keller1678df32006-08-31 21:27:51 -0700592 bar0 = pci_resource_start(dev, 0);
593 virt_base = ioremap(bar0, pci_resource_len(dev, 0));
594 if (virt_base == NULL) {
595 printk(KERN_ERR "%s: Unable to remap BAR 0 address: 0x%lx\n",
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200596 DRV_NAME, bar0);
John Keller1678df32006-08-31 21:27:51 -0700597 return -ENOMEM;
598 }
599 cmd_base = (unsigned long) virt_base + IOC4_CMD_OFFSET;
600 ctl = (unsigned long) virt_base + IOC4_CTRL_OFFSET;
601 irqport = (unsigned long) virt_base + IOC4_INTR_OFFSET;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
John Keller1678df32006-08-31 21:27:51 -0700603 cmd_phys_base = bar0 + IOC4_CMD_OFFSET;
604 if (!request_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE,
Bartlomiej Zolnierkiewicz01397012008-07-16 20:33:41 +0200605 DRV_NAME)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 printk(KERN_ERR
John Keller1678df32006-08-31 21:27:51 -0700607 "%s : %s -- ERROR, Addresses "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 "0x%p to 0x%p ALREADY in use\n",
Bartlomiej Zolnierkiewicz01397012008-07-16 20:33:41 +0200609 __func__, DRV_NAME, (void *) cmd_phys_base,
John Keller1678df32006-08-31 21:27:51 -0700610 (void *) cmd_phys_base + IOC4_CMD_CTL_BLK_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 return -ENOMEM;
612 }
613
Bartlomiej Zolnierkiewicz8f8e8482008-01-26 20:13:05 +0100614 /* Initialize the IO registers */
615 memset(&hw, 0, sizeof(hw));
616 sgiioc4_init_hwif_ports(&hw, cmd_base, ctl, irqport);
Bartlomiej Zolnierkiewicz57c802e2008-01-26 20:13:05 +0100617 hw.irq = dev->irq;
618 hw.chipset = ide_pci;
619 hw.dev = &dev->dev;
Bartlomiej Zolnierkiewiczce30e402008-07-16 20:33:44 +0200620
621 hwif = ide_find_port_slot(&d);
622 if (hwif == NULL)
623 goto err;
624
John Keller1678df32006-08-31 21:27:51 -0700625 /* The IOC4 uses MMIO rather than Port IO. */
626 default_hwif_mmiops(hwif);
627
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 /* Initializing chipset IRQ Registers */
Bartlomiej Zolnierkiewicz0ecdca22007-02-17 02:40:25 +0100629 writel(0x03, (void __iomem *)(irqport + IOC4_INTR_SET * 4));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630
Bartlomiej Zolnierkiewicz04216fa2008-04-26 22:25:23 +0200631 hwif->INB = &sgiioc4_INB;
Bartlomiej Zolnierkiewiczb9d9e612007-10-13 17:47:52 +0200632
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200633 idx[0] = hwif->index;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +0200635 if (ide_device_add(idx, &d, hws))
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +0200636 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
638 return 0;
Bartlomiej Zolnierkiewiczce30e402008-07-16 20:33:44 +0200639err:
640 release_mem_region(cmd_phys_base, IOC4_CMD_CTL_BLK_SIZE);
641 iounmap(virt_base);
642 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643}
644
645static unsigned int __devinit
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200646pci_init_sgiioc4(struct pci_dev *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 int ret;
649
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 printk(KERN_INFO "%s: IDE controller at PCI slot %s, revision %d\n",
Bartlomiej Zolnierkiewiczfc212bb2007-10-19 00:30:08 +0200651 DRV_NAME, pci_name(dev), dev->revision);
652
653 if (dev->revision < IOC4_SUPPORTED_FIRMWARE_REV) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654 printk(KERN_ERR "Skipping %s IDE controller in slot %s: "
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200655 "firmware is obsolete - please upgrade to "
656 "revision46 or higher\n",
657 DRV_NAME, pci_name(dev));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 ret = -EAGAIN;
659 goto out;
660 }
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200661 ret = sgiioc4_ide_setup_pci_device(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662out:
663 return ret;
664}
665
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666int
Brent Casavant22329b52005-06-21 17:15:59 -0700667ioc4_ide_attach_one(struct ioc4_driver_data *idd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668{
Brent Casavantf5befce2006-06-23 02:05:52 -0700669 /* PCI-RT does not bring out IDE connection.
670 * Do not attach to this particular IOC4.
671 */
672 if (idd->idd_variant == IOC4_VARIANT_PCI_RT)
673 return 0;
674
Bartlomiej Zolnierkiewiczca1997c2007-10-11 23:54:00 +0200675 return pci_init_sgiioc4(idd->idd_pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676}
677
Brent Casavant22329b52005-06-21 17:15:59 -0700678static struct ioc4_submodule ioc4_ide_submodule = {
679 .is_name = "IOC4_ide",
680 .is_owner = THIS_MODULE,
681 .is_probe = ioc4_ide_attach_one,
682/* .is_remove = ioc4_ide_remove_one, */
683};
684
Bartlomiej Zolnierkiewicz82ab1ee2007-01-27 13:46:56 +0100685static int __init ioc4_ide_init(void)
Brent Casavant22329b52005-06-21 17:15:59 -0700686{
687 return ioc4_register_submodule(&ioc4_ide_submodule);
688}
689
Brent Casavant59f14802006-10-17 00:09:25 -0700690late_initcall(ioc4_ide_init); /* Call only after IDE init is done */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
Jeremy Higdona835fa72006-05-30 21:27:07 -0700692MODULE_AUTHOR("Aniket Malatpure/Jeremy Higdon");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693MODULE_DESCRIPTION("IDE PCI driver module for SGI IOC4 Base-IO Card");
694MODULE_LICENSE("GPL");