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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Sergei Shtylyov44854ad2006-12-29 16:49:26 -08002 * linux/drivers/ide/pci/slc90e66.c Version 0.12 May 12, 2006
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
Sergei Shtylyov44854ad2006-12-29 16:49:26 -08005 * Copyright (C) 2006 MontaVista Software, Inc. <source@mvista.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 *
Sergei Shtylyov44854ad2006-12-29 16:49:26 -08007 * This is a look-alike variation of the ICH0 PIIX4 Ultra-66,
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * but this keeps the ISA-Bridge and slots alive.
9 *
10 */
11
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/types.h>
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/ioport.h>
16#include <linux/pci.h>
17#include <linux/hdreg.h>
18#include <linux/ide.h>
19#include <linux/delay.h>
20#include <linux/init.h>
21
22#include <asm/io.h>
23
24static u8 slc90e66_ratemask (ide_drive_t *drive)
25{
26 u8 mode = 2;
27
28 if (!eighty_ninty_three(drive))
29 mode = min(mode, (u8)1);
30 return mode;
31}
32
33static u8 slc90e66_dma_2_pio (u8 xfer_rate) {
34 switch(xfer_rate) {
35 case XFER_UDMA_4:
36 case XFER_UDMA_3:
37 case XFER_UDMA_2:
38 case XFER_UDMA_1:
39 case XFER_UDMA_0:
40 case XFER_MW_DMA_2:
41 case XFER_PIO_4:
42 return 4;
43 case XFER_MW_DMA_1:
44 case XFER_PIO_3:
45 return 3;
46 case XFER_SW_DMA_2:
47 case XFER_PIO_2:
48 return 2;
49 case XFER_MW_DMA_0:
50 case XFER_SW_DMA_1:
51 case XFER_SW_DMA_0:
52 case XFER_PIO_1:
53 case XFER_PIO_0:
54 case XFER_PIO_SLOW:
55 default:
56 return 0;
57 }
58}
59
60/*
61 * Based on settings done by AMI BIOS
62 * (might be useful if drive is not registered in CMOS for any reason).
63 */
64static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio)
65{
66 ide_hwif_t *hwif = HWIF(drive);
67 struct pci_dev *dev = hwif->pci_dev;
68 int is_slave = (&hwif->drives[1] == drive);
69 int master_port = hwif->channel ? 0x42 : 0x40;
70 int slave_port = 0x44;
71 unsigned long flags;
72 u16 master_data;
73 u8 slave_data;
74 /* ISP RTC */
Alan Coxf201f502006-06-28 04:27:02 -070075 static const u8 timings[][2]= {
76 { 0, 0 },
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 { 0, 0 },
78 { 1, 0 },
79 { 2, 1 },
80 { 2, 3 }, };
81
82 pio = ide_get_best_pio_mode(drive, pio, 5, NULL);
83 spin_lock_irqsave(&ide_lock, flags);
84 pci_read_config_word(dev, master_port, &master_data);
85 if (is_slave) {
86 master_data = master_data | 0x4000;
87 if (pio > 1)
88 /* enable PPE, IE and TIME */
89 master_data = master_data | 0x0070;
90 pci_read_config_byte(dev, slave_port, &slave_data);
91 slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0);
92 slave_data = slave_data | (((timings[pio][0] << 2) | timings[pio][1]) << (hwif->channel ? 4 : 0));
93 } else {
94 master_data = master_data & 0xccf8;
95 if (pio > 1)
96 /* enable PPE, IE and TIME */
97 master_data = master_data | 0x0007;
98 master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8);
99 }
100 pci_write_config_word(dev, master_port, master_data);
101 if (is_slave)
102 pci_write_config_byte(dev, slave_port, slave_data);
103 spin_unlock_irqrestore(&ide_lock, flags);
104}
105
106static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed)
107{
108 ide_hwif_t *hwif = HWIF(drive);
109 struct pci_dev *dev = hwif->pci_dev;
110 u8 maslave = hwif->channel ? 0x42 : 0x40;
111 u8 speed = ide_rate_filter(slc90e66_ratemask(drive), xferspeed);
112 int sitre = 0, a_speed = 7 << (drive->dn * 4);
113 int u_speed = 0, u_flag = 1 << drive->dn;
114 u16 reg4042, reg44, reg48, reg4a;
115
116 pci_read_config_word(dev, maslave, &reg4042);
117 sitre = (reg4042 & 0x4000) ? 1 : 0;
118 pci_read_config_word(dev, 0x44, &reg44);
119 pci_read_config_word(dev, 0x48, &reg48);
120 pci_read_config_word(dev, 0x4a, &reg4a);
121
122 switch(speed) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123 case XFER_UDMA_4: u_speed = 4 << (drive->dn * 4); break;
124 case XFER_UDMA_3: u_speed = 3 << (drive->dn * 4); break;
125 case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
126 case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
127 case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
128 case XFER_MW_DMA_2:
129 case XFER_MW_DMA_1:
130 case XFER_SW_DMA_2: break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 case XFER_PIO_4:
132 case XFER_PIO_3:
133 case XFER_PIO_2:
134 case XFER_PIO_0: break;
135 default: return -1;
136 }
137
138 if (speed >= XFER_UDMA_0) {
139 if (!(reg48 & u_flag))
140 pci_write_config_word(dev, 0x48, reg48|u_flag);
141 /* FIXME: (reg4a & a_speed) ? */
142 if ((reg4a & u_speed) != u_speed) {
143 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
144 pci_read_config_word(dev, 0x4a, &reg4a);
145 pci_write_config_word(dev, 0x4a, reg4a|u_speed);
146 }
147 } else {
148 if (reg48 & u_flag)
149 pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
150 if (reg4a & a_speed)
151 pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
152 }
153
154 slc90e66_tune_drive(drive, slc90e66_dma_2_pio(speed));
155 return (ide_config_drive_speed(drive, speed));
156}
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158static int slc90e66_config_drive_for_dma (ide_drive_t *drive)
159{
160 u8 speed = ide_dma_speed(drive, slc90e66_ratemask(drive));
161
Sergei Shtylyov44854ad2006-12-29 16:49:26 -0800162 if (!speed)
163 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165 (void) slc90e66_tune_chipset(drive, speed);
166 return ide_dma_enable(drive);
167}
168
169static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive)
170{
171 ide_hwif_t *hwif = HWIF(drive);
172 struct hd_driveid *id = drive->id;
173
174 drive->init_speed = 0;
175
176 if (id && (id->capability & 1) && drive->autodma) {
177
Sergei Shtylyov44854ad2006-12-29 16:49:26 -0800178 if (ide_use_dma(drive) && slc90e66_config_drive_for_dma(drive))
179 return hwif->ide_dma_on(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
181 goto fast_ata_pio;
182
183 } else if ((id->capability & 8) || (id->field_valid & 2)) {
184fast_ata_pio:
Sergei Shtylyov44854ad2006-12-29 16:49:26 -0800185 (void) hwif->speedproc(drive, XFER_PIO_0 +
186 ide_get_best_pio_mode(drive, 255, 4, NULL));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 return hwif->ide_dma_off_quietly(drive);
188 }
189 /* IORDY not supported */
190 return 0;
191}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Herbert Xu97319632005-07-03 16:38:51 +0200193static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194{
195 u8 reg47 = 0;
196 u8 mask = hwif->channel ? 0x01 : 0x02; /* bit0:Primary */
197
198 hwif->autodma = 0;
199
200 if (!hwif->irq)
201 hwif->irq = hwif->channel ? 15 : 14;
202
203 hwif->speedproc = &slc90e66_tune_chipset;
204 hwif->tuneproc = &slc90e66_tune_drive;
205
206 pci_read_config_byte(hwif->pci_dev, 0x47, &reg47);
207
208 if (!hwif->dma_base) {
209 hwif->drives[0].autotune = 1;
210 hwif->drives[1].autotune = 1;
211 return;
212 }
213
214 hwif->atapi_dma = 1;
215 hwif->ultra_mask = 0x1f;
216 hwif->mwdma_mask = 0x07;
217 hwif->swdma_mask = 0x07;
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 if (!(hwif->udma_four))
220 /* bit[0(1)]: 0:80, 1:40 */
221 hwif->udma_four = (reg47 & mask) ? 0 : 1;
222
223 hwif->ide_dma_check = &slc90e66_config_drive_xfer_rate;
224 if (!noautodma)
225 hwif->autodma = 1;
226 hwif->drives[0].autodma = hwif->autodma;
227 hwif->drives[1].autodma = hwif->autodma;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228}
229
230static ide_pci_device_t slc90e66_chipset __devinitdata = {
231 .name = "SLC90E66",
232 .init_hwif = init_hwif_slc90e66,
233 .channels = 2,
234 .autodma = AUTODMA,
235 .enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}},
236 .bootable = ON_BOARD,
237};
238
239static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id)
240{
241 return ide_setup_pci_device(dev, &slc90e66_chipset);
242}
243
244static struct pci_device_id slc90e66_pci_tbl[] = {
Alan Coxf201f502006-06-28 04:27:02 -0700245 { PCI_DEVICE(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0},
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 { 0, },
247};
248MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl);
249
250static struct pci_driver driver = {
251 .name = "SLC90e66_IDE",
252 .id_table = slc90e66_pci_tbl,
253 .probe = slc90e66_init_one,
254};
255
256static int slc90e66_ide_init(void)
257{
258 return ide_pci_register_driver(&driver);
259}
260
261module_init(slc90e66_ide_init);
262
263MODULE_AUTHOR("Andre Hedrick");
264MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE");
265MODULE_LICENSE("GPL");