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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (C) 2000-2002 Mark Lord <mlord@pobox.com>
Bartlomiej Zolnierkiewicz5fd216b2007-05-16 00:51:43 +02003 * Copyright (C) 2007 Bartlomiej Zolnierkiewicz
4 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 * May be copied or modified under the terms of the GNU General Public License
6 *
7 * Development of this chipset driver was funded
8 * by the nice folks at National Semiconductor.
9 *
10 * Documentation:
11 * Available from National Semiconductor
12 */
13
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/module.h>
15#include <linux/types.h>
16#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/pci.h>
18#include <linux/init.h>
19#include <linux/ide.h>
20#include <linux/pm.h>
Bartlomiej Zolnierkiewicz78829dd2008-02-02 19:56:33 +010021
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <asm/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +020024#define DRV_NAME "sc1200"
25
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#define SC1200_REV_A 0x00
27#define SC1200_REV_B1 0x01
28#define SC1200_REV_B3 0x02
29#define SC1200_REV_C1 0x03
30#define SC1200_REV_D1 0x04
31
32#define PCI_CLK_33 0x00
33#define PCI_CLK_48 0x01
34#define PCI_CLK_66 0x02
35#define PCI_CLK_33A 0x03
36
37static unsigned short sc1200_get_pci_clock (void)
38{
39 unsigned char chip_id, silicon_revision;
40 unsigned int pci_clock;
41 /*
42 * Check the silicon revision, as not all versions of the chip
43 * have the register with the fast PCI bus timings.
44 */
45 chip_id = inb (0x903c);
46 silicon_revision = inb (0x903d);
47
48 // Read the fast pci clock frequency
49 if (chip_id == 0x04 && silicon_revision < SC1200_REV_B1) {
50 pci_clock = PCI_CLK_33;
51 } else {
52 // check clock generator configuration (cfcc)
53 // the clock is in bits 8 and 9 of this word
54
55 pci_clock = inw (0x901e);
56 pci_clock >>= 8;
57 pci_clock &= 0x03;
58 if (pci_clock == PCI_CLK_33A)
59 pci_clock = PCI_CLK_33;
60 }
61 return pci_clock;
62}
63
Linus Torvalds1da177e2005-04-16 15:20:36 -070064/*
65 * Here are the standard PIO mode 0-4 timings for each "format".
66 * Format-0 uses fast data reg timings, with slower command reg timings.
67 * Format-1 uses fast timings for all registers, but won't work with all drives.
68 */
69static const unsigned int sc1200_pio_timings[4][5] =
70 {{0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010}, // format0 33Mhz
71 {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010}, // format1, 33Mhz
72 {0xfaa3f4f3, 0xc23232b2, 0x513101c1, 0x31213121, 0x10211021}, // format1, 48Mhz
73 {0xfff4fff4, 0xf35353d3, 0x814102f1, 0x42314231, 0x11311131}}; // format1, 66Mhz
74
75/*
76 * After chip reset, the PIO timings are set to 0x00009172, which is not valid.
77 */
78//#define SC1200_BAD_PIO(timings) (((timings)&~0x80000000)==0x00009172)
79
Bartlomiej Zolnierkiewicz3c3f5d22007-05-16 00:51:44 +020080static void sc1200_tunepio(ide_drive_t *drive, u8 pio)
81{
82 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +010083 struct pci_dev *pdev = to_pci_dev(hwif->dev);
Bartlomiej Zolnierkiewicz3c3f5d22007-05-16 00:51:44 +020084 unsigned int basereg = hwif->channel ? 0x50 : 0x40, format = 0;
85
86 pci_read_config_dword(pdev, basereg + 4, &format);
87 format = (format >> 31) & 1;
88 if (format)
89 format += sc1200_get_pci_clock();
90 pci_write_config_dword(pdev, basereg + ((drive->dn & 1) << 3),
91 sc1200_pio_timings[format][pio]);
92}
93
Bartlomiej Zolnierkiewicz5fd216b2007-05-16 00:51:43 +020094/*
95 * The SC1200 specifies that two drives sharing a cable cannot mix
96 * UDMA/MDMA. It has to be one or the other, for the pair, though
97 * different timings can still be chosen for each drive. We could
98 * set the appropriate timing bits on the fly, but that might be
99 * a bit confusing. So, for now we statically handle this requirement
100 * by looking at our mate drive to see what it is capable of, before
101 * choosing a mode for our own drive.
102 */
103static u8 sc1200_udma_filter(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104{
Bartlomiej Zolnierkiewicz5fd216b2007-05-16 00:51:43 +0200105 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz7e59ea22008-10-10 22:39:26 +0200106 ide_drive_t *mate = ide_get_pair_dev(drive);
Julia Lawall9ecab6e2008-12-22 23:05:06 +0100107 u16 *mateid;
Bartlomiej Zolnierkiewicz5fd216b2007-05-16 00:51:43 +0200108 u8 mask = hwif->ultra_mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
Bartlomiej Zolnierkiewicz7e59ea22008-10-10 22:39:26 +0200110 if (mate == NULL)
Bartlomiej Zolnierkiewicz5fd216b2007-05-16 00:51:43 +0200111 goto out;
Julia Lawall9ecab6e2008-12-22 23:05:06 +0100112 mateid = mate->id;
Bartlomiej Zolnierkiewicz5fd216b2007-05-16 00:51:43 +0200113
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +0200114 if (ata_id_has_dma(mateid) && __ide_dma_bad_drive(mate) == 0) {
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200115 if ((mateid[ATA_ID_FIELD_VALID] & 4) &&
116 (mateid[ATA_ID_UDMA_MODES] & 7))
Bartlomiej Zolnierkiewicz5fd216b2007-05-16 00:51:43 +0200117 goto out;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200118 if ((mateid[ATA_ID_FIELD_VALID] & 2) &&
119 (mateid[ATA_ID_MWDMA_MODES] & 7))
Bartlomiej Zolnierkiewicz5fd216b2007-05-16 00:51:43 +0200120 mask = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 }
Bartlomiej Zolnierkiewicz5fd216b2007-05-16 00:51:43 +0200122out:
123 return mask;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124}
125
Bartlomiej Zolnierkiewicz88b2b322007-10-13 17:47:51 +0200126static void sc1200_set_dma_mode(ide_drive_t *drive, const u8 mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127{
128 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100129 struct pci_dev *dev = to_pci_dev(hwif->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 unsigned int reg, timings;
131 unsigned short pci_clock;
132 unsigned int basereg = hwif->channel ? 0x50 : 0x40;
133
Bartlomiej Zolnierkiewicz4eed5042008-01-25 22:17:18 +0100134 static const u32 udma_timing[3][3] = {
135 { 0x00921250, 0x00911140, 0x00911030 },
136 { 0x00932470, 0x00922260, 0x00922140 },
137 { 0x009436a1, 0x00933481, 0x00923261 },
138 };
139
140 static const u32 mwdma_timing[3][3] = {
141 { 0x00077771, 0x00012121, 0x00002020 },
142 { 0x000bbbb2, 0x00024241, 0x00013131 },
143 { 0x000ffff3, 0x00035352, 0x00015151 },
144 };
145
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 pci_clock = sc1200_get_pci_clock();
147
148 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 * Note that each DMA mode has several timings associated with it.
150 * The correct timing depends on the fast PCI clock freq.
151 */
Bartlomiej Zolnierkiewicz4eed5042008-01-25 22:17:18 +0100152
153 if (mode >= XFER_UDMA_0)
154 timings = udma_timing[pci_clock][mode - XFER_UDMA_0];
155 else
156 timings = mwdma_timing[pci_clock][mode - XFER_MW_DMA_0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200158 if ((drive->dn & 1) == 0) {
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100159 pci_read_config_dword(dev, basereg + 4, &reg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 timings |= reg & 0x80000000; /* preserve PIO format bit */
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100161 pci_write_config_dword(dev, basereg + 4, timings);
162 } else
163 pci_write_config_dword(dev, basereg + 12, timings);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164}
165
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166/* Replacement for the standard ide_dma_end action in
167 * dma_proc.
168 *
169 * returns 1 on error, 0 otherwise
170 */
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200171static int sc1200_dma_end(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172{
173 ide_hwif_t *hwif = HWIF(drive);
174 unsigned long dma_base = hwif->dma_base;
175 byte dma_stat;
176
177 dma_stat = inb(dma_base+2); /* get DMA status */
178
179 if (!(dma_stat & 4))
180 printk(" ide_dma_end dma_stat=%0x err=%x newerr=%x\n",
181 dma_stat, ((dma_stat&7)!=4), ((dma_stat&2)==2));
182
183 outb(dma_stat|0x1b, dma_base+2); /* clear the INTR & ERROR bits */
184 outb(inb(dma_base)&~1, dma_base); /* !! DO THIS HERE !! stop DMA */
185
186 drive->waiting_for_dma = 0;
187 ide_destroy_dmatable(drive); /* purge DMA mappings */
188
189 return (dma_stat & 7) != 4; /* verify good DMA status */
190}
191
192/*
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200193 * sc1200_set_pio_mode() handles setting of PIO modes
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 * for both the chipset and drive.
195 *
196 * All existing BIOSs for this chipset guarantee that all drives
197 * will have valid default PIO timings set up before we get here.
198 */
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200199
200static void sc1200_set_pio_mode(ide_drive_t *drive, const u8 pio)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201{
202 ide_hwif_t *hwif = HWIF(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 int mode = -1;
204
Bartlomiej Zolnierkiewicza01ba402007-05-16 00:51:44 +0200205 /*
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200206 * bad abuse of ->set_pio_mode interface
Bartlomiej Zolnierkiewicza01ba402007-05-16 00:51:44 +0200207 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 switch (pio) {
209 case 200: mode = XFER_UDMA_0; break;
210 case 201: mode = XFER_UDMA_1; break;
211 case 202: mode = XFER_UDMA_2; break;
212 case 100: mode = XFER_MW_DMA_0; break;
213 case 101: mode = XFER_MW_DMA_1; break;
214 case 102: mode = XFER_MW_DMA_2; break;
215 }
216 if (mode != -1) {
217 printk("SC1200: %s: changing (U)DMA mode\n", drive->name);
Bartlomiej Zolnierkiewicz4a546e02008-01-26 20:13:01 +0100218 ide_dma_off_quietly(drive);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200219 if (ide_set_dma_mode(drive, mode) == 0 &&
220 (drive->dev_flags & IDE_DFLAG_USING_DMA))
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200221 hwif->dma_ops->dma_host_set(drive, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 return;
223 }
224
Bartlomiej Zolnierkiewicz88b2b322007-10-13 17:47:51 +0200225 sc1200_tunepio(drive, pio);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226}
227
Alexey Dobriyanb86cc292006-10-03 01:14:32 -0700228#ifdef CONFIG_PM
Bartlomiej Zolnierkiewicz7c0e2662008-01-25 22:17:14 +0100229struct sc1200_saved_state {
230 u32 regs[8];
231};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
Pavel Machek3bfffd92005-04-16 15:25:37 -0700233static int sc1200_suspend (struct pci_dev *dev, pm_message_t state)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234{
Pavel Machekca078ba2005-09-03 15:56:57 -0700235 printk("SC1200: suspend(%u)\n", state.event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236
Bartlomiej Zolnierkiewicz7c0e2662008-01-25 22:17:14 +0100237 /*
238 * we only save state when going from full power to less
239 */
Pavel Machekca078ba2005-09-03 15:56:57 -0700240 if (state.event == PM_EVENT_ON) {
Bartlomiej Zolnierkiewicz96776f32008-07-24 22:53:16 +0200241 struct ide_host *host = pci_get_drvdata(dev);
242 struct sc1200_saved_state *ss = host->host_priv;
Bartlomiej Zolnierkiewicz7c0e2662008-01-25 22:17:14 +0100243 unsigned int r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Bartlomiej Zolnierkiewicz7c0e2662008-01-25 22:17:14 +0100245 /*
Bartlomiej Zolnierkiewicz7c0e2662008-01-25 22:17:14 +0100246 * save timing registers
247 * (this may be unnecessary if BIOS also does it)
248 */
249 for (r = 0; r < 8; r++)
250 pci_read_config_dword(dev, 0x40 + r * 4, &ss->regs[r]);
251 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
253 pci_disable_device(dev);
Pavel Machekca078ba2005-09-03 15:56:57 -0700254 pci_set_power_state(dev, pci_choose_state(dev, state));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 return 0;
256}
257
258static int sc1200_resume (struct pci_dev *dev)
259{
Bartlomiej Zolnierkiewicz96776f32008-07-24 22:53:16 +0200260 struct ide_host *host = pci_get_drvdata(dev);
261 struct sc1200_saved_state *ss = host->host_priv;
Bartlomiej Zolnierkiewicz7c0e2662008-01-25 22:17:14 +0100262 unsigned int r;
263 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Jeff Garzik9d434812007-10-26 20:31:15 +0200265 i = pci_enable_device(dev);
266 if (i)
267 return i;
268
Bartlomiej Zolnierkiewicz7c0e2662008-01-25 22:17:14 +0100269 /*
270 * restore timing registers
271 * (this may be unnecessary if BIOS also does it)
272 */
Bartlomiej Zolnierkiewicz96776f32008-07-24 22:53:16 +0200273 for (r = 0; r < 8; r++)
274 pci_write_config_dword(dev, 0x40 + r * 4, ss->regs[r]);
Bartlomiej Zolnierkiewicz7c0e2662008-01-25 22:17:14 +0100275
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 return 0;
277}
Alexey Dobriyanb86cc292006-10-03 01:14:32 -0700278#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200280static const struct ide_port_ops sc1200_port_ops = {
281 .set_pio_mode = sc1200_set_pio_mode,
282 .set_dma_mode = sc1200_set_dma_mode,
283 .udma_filter = sc1200_udma_filter,
284};
285
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +0200286static const struct ide_dma_ops sc1200_dma_ops = {
287 .dma_host_set = ide_dma_host_set,
288 .dma_setup = ide_dma_setup,
289 .dma_exec_cmd = ide_dma_exec_cmd,
290 .dma_start = ide_dma_start,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200291 .dma_end = sc1200_dma_end,
Bartlomiej Zolnierkiewiczf37afda2008-04-26 22:25:24 +0200292 .dma_test_irq = ide_dma_test_irq,
293 .dma_lost_irq = ide_dma_lost_irq,
294 .dma_timeout = ide_dma_timeout,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200295};
296
Bartlomiej Zolnierkiewicz85620432007-10-20 00:32:34 +0200297static const struct ide_port_info sc1200_chipset __devinitdata = {
Bartlomiej Zolnierkiewiczced3ec82008-07-24 22:53:32 +0200298 .name = DRV_NAME,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200299 .port_ops = &sc1200_port_ops,
Bartlomiej Zolnierkiewicz5e37bdc2008-04-26 22:25:24 +0200300 .dma_ops = &sc1200_dma_ops,
Bartlomiej Zolnierkiewicz1c513612007-10-19 00:30:10 +0200301 .host_flags = IDE_HFLAG_SERIALIZE |
302 IDE_HFLAG_POST_SET_MODE |
Bartlomiej Zolnierkiewicz5e71d9c2008-04-26 17:36:35 +0200303 IDE_HFLAG_ABUSE_DMA_MODES,
Bartlomiej Zolnierkiewicz4099d142007-07-20 01:11:59 +0200304 .pio_mask = ATA_PIO4,
Bartlomiej Zolnierkiewicz5f8b6c32007-10-19 00:30:07 +0200305 .mwdma_mask = ATA_MWDMA2,
306 .udma_mask = ATA_UDMA2,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307};
308
309static int __devinit sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id)
310{
Bartlomiej Zolnierkiewicz96776f32008-07-24 22:53:16 +0200311 struct sc1200_saved_state *ss = NULL;
312 int rc;
313
314#ifdef CONFIG_PM
315 ss = kmalloc(sizeof(*ss), GFP_KERNEL);
316 if (ss == NULL)
317 return -ENOMEM;
318#endif
319 rc = ide_pci_init_one(dev, &sc1200_chipset, ss);
320 if (rc)
321 kfree(ss);
322
323 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324}
325
Bartlomiej Zolnierkiewicz9cbcc5e2007-10-16 22:29:56 +0200326static const struct pci_device_id sc1200_pci_tbl[] = {
327 { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SCx200_IDE), 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 { 0, },
329};
330MODULE_DEVICE_TABLE(pci, sc1200_pci_tbl);
331
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200332static struct pci_driver sc1200_pci_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 .name = "SC1200_IDE",
334 .id_table = sc1200_pci_tbl,
335 .probe = sc1200_init_one,
Bartlomiej Zolnierkiewicz991f5e62008-07-24 22:53:24 +0200336 .remove = ide_pci_remove,
Alexey Dobriyanb86cc292006-10-03 01:14:32 -0700337#ifdef CONFIG_PM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 .suspend = sc1200_suspend,
339 .resume = sc1200_resume,
Alexey Dobriyanb86cc292006-10-03 01:14:32 -0700340#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341};
342
Bartlomiej Zolnierkiewicz82ab1ee2007-01-27 13:46:56 +0100343static int __init sc1200_ide_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200345 return ide_pci_register_driver(&sc1200_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346}
347
Bartlomiej Zolnierkiewicz991f5e62008-07-24 22:53:24 +0200348static void __exit sc1200_ide_exit(void)
349{
Bartlomiej Zolnierkiewicza9ab09e2008-10-13 21:39:41 +0200350 pci_unregister_driver(&sc1200_pci_driver);
Bartlomiej Zolnierkiewicz991f5e62008-07-24 22:53:24 +0200351}
352
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353module_init(sc1200_ide_init);
Bartlomiej Zolnierkiewicz991f5e62008-07-24 22:53:24 +0200354module_exit(sc1200_ide_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
356MODULE_AUTHOR("Mark Lord");
357MODULE_DESCRIPTION("PCI driver module for NS SC1200 IDE");
358MODULE_LICENSE("GPL");