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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/pci/slc90e66.c Version 0.11 September 11, 2002 | |
3 | * | |
4 | * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> | |
5 | * | |
6 | * This a look-a-like variation of the ICH0 PIIX4 Ultra-66, | |
7 | * but this keeps the ISA-Bridge and slots alive. | |
8 | * | |
9 | */ | |
10 | ||
1da177e4 LT |
11 | #include <linux/types.h> |
12 | #include <linux/module.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/ioport.h> | |
15 | #include <linux/pci.h> | |
16 | #include <linux/hdreg.h> | |
17 | #include <linux/ide.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/init.h> | |
20 | ||
21 | #include <asm/io.h> | |
22 | ||
23 | static u8 slc90e66_ratemask (ide_drive_t *drive) | |
24 | { | |
25 | u8 mode = 2; | |
26 | ||
27 | if (!eighty_ninty_three(drive)) | |
28 | mode = min(mode, (u8)1); | |
29 | return mode; | |
30 | } | |
31 | ||
32 | static u8 slc90e66_dma_2_pio (u8 xfer_rate) { | |
33 | switch(xfer_rate) { | |
34 | case XFER_UDMA_4: | |
35 | case XFER_UDMA_3: | |
36 | case XFER_UDMA_2: | |
37 | case XFER_UDMA_1: | |
38 | case XFER_UDMA_0: | |
39 | case XFER_MW_DMA_2: | |
40 | case XFER_PIO_4: | |
41 | return 4; | |
42 | case XFER_MW_DMA_1: | |
43 | case XFER_PIO_3: | |
44 | return 3; | |
45 | case XFER_SW_DMA_2: | |
46 | case XFER_PIO_2: | |
47 | return 2; | |
48 | case XFER_MW_DMA_0: | |
49 | case XFER_SW_DMA_1: | |
50 | case XFER_SW_DMA_0: | |
51 | case XFER_PIO_1: | |
52 | case XFER_PIO_0: | |
53 | case XFER_PIO_SLOW: | |
54 | default: | |
55 | return 0; | |
56 | } | |
57 | } | |
58 | ||
59 | /* | |
60 | * Based on settings done by AMI BIOS | |
61 | * (might be useful if drive is not registered in CMOS for any reason). | |
62 | */ | |
63 | static void slc90e66_tune_drive (ide_drive_t *drive, u8 pio) | |
64 | { | |
65 | ide_hwif_t *hwif = HWIF(drive); | |
66 | struct pci_dev *dev = hwif->pci_dev; | |
67 | int is_slave = (&hwif->drives[1] == drive); | |
68 | int master_port = hwif->channel ? 0x42 : 0x40; | |
69 | int slave_port = 0x44; | |
70 | unsigned long flags; | |
71 | u16 master_data; | |
72 | u8 slave_data; | |
73 | /* ISP RTC */ | |
f201f504 AC |
74 | static const u8 timings[][2]= { |
75 | { 0, 0 }, | |
1da177e4 LT |
76 | { 0, 0 }, |
77 | { 1, 0 }, | |
78 | { 2, 1 }, | |
79 | { 2, 3 }, }; | |
80 | ||
81 | pio = ide_get_best_pio_mode(drive, pio, 5, NULL); | |
82 | spin_lock_irqsave(&ide_lock, flags); | |
83 | pci_read_config_word(dev, master_port, &master_data); | |
84 | if (is_slave) { | |
85 | master_data = master_data | 0x4000; | |
86 | if (pio > 1) | |
87 | /* enable PPE, IE and TIME */ | |
88 | master_data = master_data | 0x0070; | |
89 | pci_read_config_byte(dev, slave_port, &slave_data); | |
90 | slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0); | |
91 | slave_data = slave_data | (((timings[pio][0] << 2) | timings[pio][1]) << (hwif->channel ? 4 : 0)); | |
92 | } else { | |
93 | master_data = master_data & 0xccf8; | |
94 | if (pio > 1) | |
95 | /* enable PPE, IE and TIME */ | |
96 | master_data = master_data | 0x0007; | |
97 | master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8); | |
98 | } | |
99 | pci_write_config_word(dev, master_port, master_data); | |
100 | if (is_slave) | |
101 | pci_write_config_byte(dev, slave_port, slave_data); | |
102 | spin_unlock_irqrestore(&ide_lock, flags); | |
103 | } | |
104 | ||
105 | static int slc90e66_tune_chipset (ide_drive_t *drive, u8 xferspeed) | |
106 | { | |
107 | ide_hwif_t *hwif = HWIF(drive); | |
108 | struct pci_dev *dev = hwif->pci_dev; | |
109 | u8 maslave = hwif->channel ? 0x42 : 0x40; | |
110 | u8 speed = ide_rate_filter(slc90e66_ratemask(drive), xferspeed); | |
111 | int sitre = 0, a_speed = 7 << (drive->dn * 4); | |
112 | int u_speed = 0, u_flag = 1 << drive->dn; | |
113 | u16 reg4042, reg44, reg48, reg4a; | |
114 | ||
115 | pci_read_config_word(dev, maslave, ®4042); | |
116 | sitre = (reg4042 & 0x4000) ? 1 : 0; | |
117 | pci_read_config_word(dev, 0x44, ®44); | |
118 | pci_read_config_word(dev, 0x48, ®48); | |
119 | pci_read_config_word(dev, 0x4a, ®4a); | |
120 | ||
121 | switch(speed) { | |
1da177e4 LT |
122 | case XFER_UDMA_4: u_speed = 4 << (drive->dn * 4); break; |
123 | case XFER_UDMA_3: u_speed = 3 << (drive->dn * 4); break; | |
124 | case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break; | |
125 | case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break; | |
126 | case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break; | |
127 | case XFER_MW_DMA_2: | |
128 | case XFER_MW_DMA_1: | |
129 | case XFER_SW_DMA_2: break; | |
1da177e4 LT |
130 | case XFER_PIO_4: |
131 | case XFER_PIO_3: | |
132 | case XFER_PIO_2: | |
133 | case XFER_PIO_0: break; | |
134 | default: return -1; | |
135 | } | |
136 | ||
137 | if (speed >= XFER_UDMA_0) { | |
138 | if (!(reg48 & u_flag)) | |
139 | pci_write_config_word(dev, 0x48, reg48|u_flag); | |
140 | /* FIXME: (reg4a & a_speed) ? */ | |
141 | if ((reg4a & u_speed) != u_speed) { | |
142 | pci_write_config_word(dev, 0x4a, reg4a & ~a_speed); | |
143 | pci_read_config_word(dev, 0x4a, ®4a); | |
144 | pci_write_config_word(dev, 0x4a, reg4a|u_speed); | |
145 | } | |
146 | } else { | |
147 | if (reg48 & u_flag) | |
148 | pci_write_config_word(dev, 0x48, reg48 & ~u_flag); | |
149 | if (reg4a & a_speed) | |
150 | pci_write_config_word(dev, 0x4a, reg4a & ~a_speed); | |
151 | } | |
152 | ||
153 | slc90e66_tune_drive(drive, slc90e66_dma_2_pio(speed)); | |
154 | return (ide_config_drive_speed(drive, speed)); | |
155 | } | |
156 | ||
1da177e4 LT |
157 | static int slc90e66_config_drive_for_dma (ide_drive_t *drive) |
158 | { | |
159 | u8 speed = ide_dma_speed(drive, slc90e66_ratemask(drive)); | |
160 | ||
161 | if (!(speed)) { | |
162 | u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL); | |
163 | speed = slc90e66_dma_2_pio(XFER_PIO_0 + tspeed); | |
164 | } | |
165 | ||
166 | (void) slc90e66_tune_chipset(drive, speed); | |
167 | return ide_dma_enable(drive); | |
168 | } | |
169 | ||
170 | static int slc90e66_config_drive_xfer_rate (ide_drive_t *drive) | |
171 | { | |
172 | ide_hwif_t *hwif = HWIF(drive); | |
173 | struct hd_driveid *id = drive->id; | |
174 | ||
175 | drive->init_speed = 0; | |
176 | ||
177 | if (id && (id->capability & 1) && drive->autodma) { | |
178 | ||
179 | if (ide_use_dma(drive)) { | |
180 | if (slc90e66_config_drive_for_dma(drive)) | |
181 | return hwif->ide_dma_on(drive); | |
182 | } | |
183 | ||
184 | goto fast_ata_pio; | |
185 | ||
186 | } else if ((id->capability & 8) || (id->field_valid & 2)) { | |
187 | fast_ata_pio: | |
188 | hwif->tuneproc(drive, 5); | |
189 | return hwif->ide_dma_off_quietly(drive); | |
190 | } | |
191 | /* IORDY not supported */ | |
192 | return 0; | |
193 | } | |
1da177e4 | 194 | |
97319630 | 195 | static void __devinit init_hwif_slc90e66 (ide_hwif_t *hwif) |
1da177e4 LT |
196 | { |
197 | u8 reg47 = 0; | |
198 | u8 mask = hwif->channel ? 0x01 : 0x02; /* bit0:Primary */ | |
199 | ||
200 | hwif->autodma = 0; | |
201 | ||
202 | if (!hwif->irq) | |
203 | hwif->irq = hwif->channel ? 15 : 14; | |
204 | ||
205 | hwif->speedproc = &slc90e66_tune_chipset; | |
206 | hwif->tuneproc = &slc90e66_tune_drive; | |
207 | ||
208 | pci_read_config_byte(hwif->pci_dev, 0x47, ®47); | |
209 | ||
210 | if (!hwif->dma_base) { | |
211 | hwif->drives[0].autotune = 1; | |
212 | hwif->drives[1].autotune = 1; | |
213 | return; | |
214 | } | |
215 | ||
216 | hwif->atapi_dma = 1; | |
217 | hwif->ultra_mask = 0x1f; | |
218 | hwif->mwdma_mask = 0x07; | |
219 | hwif->swdma_mask = 0x07; | |
220 | ||
1da177e4 LT |
221 | if (!(hwif->udma_four)) |
222 | /* bit[0(1)]: 0:80, 1:40 */ | |
223 | hwif->udma_four = (reg47 & mask) ? 0 : 1; | |
224 | ||
225 | hwif->ide_dma_check = &slc90e66_config_drive_xfer_rate; | |
226 | if (!noautodma) | |
227 | hwif->autodma = 1; | |
228 | hwif->drives[0].autodma = hwif->autodma; | |
229 | hwif->drives[1].autodma = hwif->autodma; | |
1da177e4 LT |
230 | } |
231 | ||
232 | static ide_pci_device_t slc90e66_chipset __devinitdata = { | |
233 | .name = "SLC90E66", | |
234 | .init_hwif = init_hwif_slc90e66, | |
235 | .channels = 2, | |
236 | .autodma = AUTODMA, | |
237 | .enablebits = {{0x41,0x80,0x80}, {0x43,0x80,0x80}}, | |
238 | .bootable = ON_BOARD, | |
239 | }; | |
240 | ||
241 | static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
242 | { | |
243 | return ide_setup_pci_device(dev, &slc90e66_chipset); | |
244 | } | |
245 | ||
246 | static struct pci_device_id slc90e66_pci_tbl[] = { | |
f201f504 | 247 | { PCI_DEVICE(PCI_VENDOR_ID_EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0}, |
1da177e4 LT |
248 | { 0, }, |
249 | }; | |
250 | MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl); | |
251 | ||
252 | static struct pci_driver driver = { | |
253 | .name = "SLC90e66_IDE", | |
254 | .id_table = slc90e66_pci_tbl, | |
255 | .probe = slc90e66_init_one, | |
256 | }; | |
257 | ||
258 | static int slc90e66_ide_init(void) | |
259 | { | |
260 | return ide_pci_register_driver(&driver); | |
261 | } | |
262 | ||
263 | module_init(slc90e66_ide_init); | |
264 | ||
265 | MODULE_AUTHOR("Andre Hedrick"); | |
266 | MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE"); | |
267 | MODULE_LICENSE("GPL"); |