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1da177e4 | 1 | /* |
1da177e4 | 2 | * Copyright (C) 2000-2002 Mark Lord <mlord@pobox.com> |
5fd216bb BZ |
3 | * Copyright (C) 2007 Bartlomiej Zolnierkiewicz |
4 | * | |
1da177e4 LT |
5 | * 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 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/types.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/timer.h> | |
19 | #include <linux/mm.h> | |
20 | #include <linux/ioport.h> | |
21 | #include <linux/blkdev.h> | |
22 | #include <linux/hdreg.h> | |
23 | #include <linux/interrupt.h> | |
24 | #include <linux/pci.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/ide.h> | |
27 | #include <linux/pm.h> | |
28 | #include <asm/io.h> | |
29 | #include <asm/irq.h> | |
30 | ||
31 | #define SC1200_REV_A 0x00 | |
32 | #define SC1200_REV_B1 0x01 | |
33 | #define SC1200_REV_B3 0x02 | |
34 | #define SC1200_REV_C1 0x03 | |
35 | #define SC1200_REV_D1 0x04 | |
36 | ||
37 | #define PCI_CLK_33 0x00 | |
38 | #define PCI_CLK_48 0x01 | |
39 | #define PCI_CLK_66 0x02 | |
40 | #define PCI_CLK_33A 0x03 | |
41 | ||
42 | static unsigned short sc1200_get_pci_clock (void) | |
43 | { | |
44 | unsigned char chip_id, silicon_revision; | |
45 | unsigned int pci_clock; | |
46 | /* | |
47 | * Check the silicon revision, as not all versions of the chip | |
48 | * have the register with the fast PCI bus timings. | |
49 | */ | |
50 | chip_id = inb (0x903c); | |
51 | silicon_revision = inb (0x903d); | |
52 | ||
53 | // Read the fast pci clock frequency | |
54 | if (chip_id == 0x04 && silicon_revision < SC1200_REV_B1) { | |
55 | pci_clock = PCI_CLK_33; | |
56 | } else { | |
57 | // check clock generator configuration (cfcc) | |
58 | // the clock is in bits 8 and 9 of this word | |
59 | ||
60 | pci_clock = inw (0x901e); | |
61 | pci_clock >>= 8; | |
62 | pci_clock &= 0x03; | |
63 | if (pci_clock == PCI_CLK_33A) | |
64 | pci_clock = PCI_CLK_33; | |
65 | } | |
66 | return pci_clock; | |
67 | } | |
68 | ||
1da177e4 LT |
69 | /* |
70 | * Here are the standard PIO mode 0-4 timings for each "format". | |
71 | * Format-0 uses fast data reg timings, with slower command reg timings. | |
72 | * Format-1 uses fast timings for all registers, but won't work with all drives. | |
73 | */ | |
74 | static const unsigned int sc1200_pio_timings[4][5] = | |
75 | {{0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010}, // format0 33Mhz | |
76 | {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010}, // format1, 33Mhz | |
77 | {0xfaa3f4f3, 0xc23232b2, 0x513101c1, 0x31213121, 0x10211021}, // format1, 48Mhz | |
78 | {0xfff4fff4, 0xf35353d3, 0x814102f1, 0x42314231, 0x11311131}}; // format1, 66Mhz | |
79 | ||
80 | /* | |
81 | * After chip reset, the PIO timings are set to 0x00009172, which is not valid. | |
82 | */ | |
83 | //#define SC1200_BAD_PIO(timings) (((timings)&~0x80000000)==0x00009172) | |
84 | ||
3c3f5d2c BZ |
85 | static void sc1200_tunepio(ide_drive_t *drive, u8 pio) |
86 | { | |
87 | ide_hwif_t *hwif = drive->hwif; | |
36501650 | 88 | struct pci_dev *pdev = to_pci_dev(hwif->dev); |
3c3f5d2c BZ |
89 | unsigned int basereg = hwif->channel ? 0x50 : 0x40, format = 0; |
90 | ||
91 | pci_read_config_dword(pdev, basereg + 4, &format); | |
92 | format = (format >> 31) & 1; | |
93 | if (format) | |
94 | format += sc1200_get_pci_clock(); | |
95 | pci_write_config_dword(pdev, basereg + ((drive->dn & 1) << 3), | |
96 | sc1200_pio_timings[format][pio]); | |
97 | } | |
98 | ||
5fd216bb BZ |
99 | /* |
100 | * The SC1200 specifies that two drives sharing a cable cannot mix | |
101 | * UDMA/MDMA. It has to be one or the other, for the pair, though | |
102 | * different timings can still be chosen for each drive. We could | |
103 | * set the appropriate timing bits on the fly, but that might be | |
104 | * a bit confusing. So, for now we statically handle this requirement | |
105 | * by looking at our mate drive to see what it is capable of, before | |
106 | * choosing a mode for our own drive. | |
107 | */ | |
108 | static u8 sc1200_udma_filter(ide_drive_t *drive) | |
1da177e4 | 109 | { |
5fd216bb BZ |
110 | ide_hwif_t *hwif = drive->hwif; |
111 | ide_drive_t *mate = &hwif->drives[(drive->dn & 1) ^ 1]; | |
112 | struct hd_driveid *mateid = mate->id; | |
113 | u8 mask = hwif->ultra_mask; | |
114 | ||
115 | if (mate->present == 0) | |
116 | goto out; | |
117 | ||
118 | if ((mateid->capability & 1) && __ide_dma_bad_drive(mate) == 0) { | |
119 | if ((mateid->field_valid & 4) && (mateid->dma_ultra & 7)) | |
120 | goto out; | |
121 | if ((mateid->field_valid & 2) && (mateid->dma_mword & 7)) | |
122 | mask = 0; | |
1da177e4 | 123 | } |
5fd216bb BZ |
124 | out: |
125 | return mask; | |
1da177e4 LT |
126 | } |
127 | ||
88b2b32b | 128 | static void sc1200_set_dma_mode(ide_drive_t *drive, const u8 mode) |
1da177e4 LT |
129 | { |
130 | ide_hwif_t *hwif = HWIF(drive); | |
36501650 | 131 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
1da177e4 LT |
132 | int unit = drive->select.b.unit; |
133 | unsigned int reg, timings; | |
134 | unsigned short pci_clock; | |
135 | unsigned int basereg = hwif->channel ? 0x50 : 0x40; | |
136 | ||
4eed504d BZ |
137 | static const u32 udma_timing[3][3] = { |
138 | { 0x00921250, 0x00911140, 0x00911030 }, | |
139 | { 0x00932470, 0x00922260, 0x00922140 }, | |
140 | { 0x009436a1, 0x00933481, 0x00923261 }, | |
141 | }; | |
142 | ||
143 | static const u32 mwdma_timing[3][3] = { | |
144 | { 0x00077771, 0x00012121, 0x00002020 }, | |
145 | { 0x000bbbb2, 0x00024241, 0x00013131 }, | |
146 | { 0x000ffff3, 0x00035352, 0x00015151 }, | |
147 | }; | |
148 | ||
1da177e4 LT |
149 | pci_clock = sc1200_get_pci_clock(); |
150 | ||
151 | /* | |
1da177e4 LT |
152 | * Note that each DMA mode has several timings associated with it. |
153 | * The correct timing depends on the fast PCI clock freq. | |
154 | */ | |
4eed504d BZ |
155 | |
156 | if (mode >= XFER_UDMA_0) | |
157 | timings = udma_timing[pci_clock][mode - XFER_UDMA_0]; | |
158 | else | |
159 | timings = mwdma_timing[pci_clock][mode - XFER_MW_DMA_0]; | |
1da177e4 LT |
160 | |
161 | if (unit == 0) { /* are we configuring drive0? */ | |
36501650 | 162 | pci_read_config_dword(dev, basereg + 4, ®); |
1da177e4 | 163 | timings |= reg & 0x80000000; /* preserve PIO format bit */ |
36501650 BZ |
164 | pci_write_config_dword(dev, basereg + 4, timings); |
165 | } else | |
166 | pci_write_config_dword(dev, basereg + 12, timings); | |
1da177e4 LT |
167 | } |
168 | ||
1da177e4 LT |
169 | /* Replacement for the standard ide_dma_end action in |
170 | * dma_proc. | |
171 | * | |
172 | * returns 1 on error, 0 otherwise | |
173 | */ | |
174 | static int sc1200_ide_dma_end (ide_drive_t *drive) | |
175 | { | |
176 | ide_hwif_t *hwif = HWIF(drive); | |
177 | unsigned long dma_base = hwif->dma_base; | |
178 | byte dma_stat; | |
179 | ||
180 | dma_stat = inb(dma_base+2); /* get DMA status */ | |
181 | ||
182 | if (!(dma_stat & 4)) | |
183 | printk(" ide_dma_end dma_stat=%0x err=%x newerr=%x\n", | |
184 | dma_stat, ((dma_stat&7)!=4), ((dma_stat&2)==2)); | |
185 | ||
186 | outb(dma_stat|0x1b, dma_base+2); /* clear the INTR & ERROR bits */ | |
187 | outb(inb(dma_base)&~1, dma_base); /* !! DO THIS HERE !! stop DMA */ | |
188 | ||
189 | drive->waiting_for_dma = 0; | |
190 | ide_destroy_dmatable(drive); /* purge DMA mappings */ | |
191 | ||
192 | return (dma_stat & 7) != 4; /* verify good DMA status */ | |
193 | } | |
194 | ||
195 | /* | |
26bcb879 | 196 | * sc1200_set_pio_mode() handles setting of PIO modes |
1da177e4 LT |
197 | * for both the chipset and drive. |
198 | * | |
199 | * All existing BIOSs for this chipset guarantee that all drives | |
200 | * will have valid default PIO timings set up before we get here. | |
201 | */ | |
26bcb879 BZ |
202 | |
203 | static void sc1200_set_pio_mode(ide_drive_t *drive, const u8 pio) | |
1da177e4 LT |
204 | { |
205 | ide_hwif_t *hwif = HWIF(drive); | |
1da177e4 LT |
206 | int mode = -1; |
207 | ||
a01ba401 | 208 | /* |
26bcb879 | 209 | * bad abuse of ->set_pio_mode interface |
a01ba401 | 210 | */ |
1da177e4 LT |
211 | switch (pio) { |
212 | case 200: mode = XFER_UDMA_0; break; | |
213 | case 201: mode = XFER_UDMA_1; break; | |
214 | case 202: mode = XFER_UDMA_2; break; | |
215 | case 100: mode = XFER_MW_DMA_0; break; | |
216 | case 101: mode = XFER_MW_DMA_1; break; | |
217 | case 102: mode = XFER_MW_DMA_2; break; | |
218 | } | |
219 | if (mode != -1) { | |
220 | printk("SC1200: %s: changing (U)DMA mode\n", drive->name); | |
4a546e04 | 221 | ide_dma_off_quietly(drive); |
f37aaf9e | 222 | if (ide_set_dma_mode(drive, mode) == 0 && drive->using_dma) |
15ce926a | 223 | hwif->dma_host_set(drive, 1); |
1da177e4 LT |
224 | return; |
225 | } | |
226 | ||
88b2b32b | 227 | sc1200_tunepio(drive, pio); |
1da177e4 LT |
228 | } |
229 | ||
b86cc29d | 230 | #ifdef CONFIG_PM |
7c0e2666 BZ |
231 | struct sc1200_saved_state { |
232 | u32 regs[8]; | |
233 | }; | |
1da177e4 | 234 | |
3bfffd97 | 235 | static int sc1200_suspend (struct pci_dev *dev, pm_message_t state) |
1da177e4 | 236 | { |
ca078bae | 237 | printk("SC1200: suspend(%u)\n", state.event); |
1da177e4 | 238 | |
7c0e2666 BZ |
239 | /* |
240 | * we only save state when going from full power to less | |
241 | */ | |
ca078bae | 242 | if (state.event == PM_EVENT_ON) { |
7c0e2666 BZ |
243 | struct sc1200_saved_state *ss; |
244 | unsigned int r; | |
245 | ||
246 | /* | |
247 | * allocate a permanent save area, if not already allocated | |
248 | */ | |
249 | ss = (struct sc1200_saved_state *)pci_get_drvdata(dev); | |
250 | if (ss == NULL) { | |
251 | ss = kmalloc(sizeof(*ss), GFP_KERNEL); | |
252 | if (ss == NULL) | |
253 | return -ENOMEM; | |
254 | pci_set_drvdata(dev, ss); | |
1da177e4 | 255 | } |
1da177e4 | 256 | |
7c0e2666 BZ |
257 | /* |
258 | * save timing registers | |
259 | * (this may be unnecessary if BIOS also does it) | |
260 | */ | |
261 | for (r = 0; r < 8; r++) | |
262 | pci_read_config_dword(dev, 0x40 + r * 4, &ss->regs[r]); | |
263 | } | |
1da177e4 LT |
264 | |
265 | pci_disable_device(dev); | |
ca078bae | 266 | pci_set_power_state(dev, pci_choose_state(dev, state)); |
1da177e4 LT |
267 | return 0; |
268 | } | |
269 | ||
270 | static int sc1200_resume (struct pci_dev *dev) | |
271 | { | |
7c0e2666 BZ |
272 | struct sc1200_saved_state *ss; |
273 | unsigned int r; | |
274 | int i; | |
9d434813 JG |
275 | |
276 | i = pci_enable_device(dev); | |
277 | if (i) | |
278 | return i; | |
1da177e4 | 279 | |
7c0e2666 BZ |
280 | ss = (struct sc1200_saved_state *)pci_get_drvdata(dev); |
281 | ||
282 | /* | |
283 | * restore timing registers | |
284 | * (this may be unnecessary if BIOS also does it) | |
285 | */ | |
286 | if (ss) { | |
287 | for (r = 0; r < 8; r++) | |
288 | pci_write_config_dword(dev, 0x40 + r * 4, ss->regs[r]); | |
1da177e4 | 289 | } |
7c0e2666 | 290 | |
1da177e4 LT |
291 | return 0; |
292 | } | |
b86cc29d | 293 | #endif |
1da177e4 LT |
294 | |
295 | /* | |
296 | * This gets invoked by the IDE driver once for each channel, | |
297 | * and performs channel-specific pre-initialization before drive probing. | |
298 | */ | |
6a6e1b1c | 299 | static void __devinit init_hwif_sc1200 (ide_hwif_t *hwif) |
1da177e4 | 300 | { |
88ae4d8c BZ |
301 | hwif->set_pio_mode = &sc1200_set_pio_mode; |
302 | hwif->set_dma_mode = &sc1200_set_dma_mode; | |
303 | ||
304 | if (hwif->dma_base == 0) | |
305 | return; | |
306 | ||
307 | hwif->udma_filter = sc1200_udma_filter; | |
88ae4d8c | 308 | hwif->ide_dma_end = &sc1200_ide_dma_end; |
1da177e4 LT |
309 | } |
310 | ||
85620436 | 311 | static const struct ide_port_info sc1200_chipset __devinitdata = { |
1da177e4 LT |
312 | .name = "SC1200", |
313 | .init_hwif = init_hwif_sc1200, | |
1c51361a BZ |
314 | .host_flags = IDE_HFLAG_SERIALIZE | |
315 | IDE_HFLAG_POST_SET_MODE | | |
316 | IDE_HFLAG_ABUSE_DMA_MODES | | |
7cab14a7 | 317 | IDE_HFLAG_BOOTABLE, |
4099d143 | 318 | .pio_mask = ATA_PIO4, |
5f8b6c34 BZ |
319 | .mwdma_mask = ATA_MWDMA2, |
320 | .udma_mask = ATA_UDMA2, | |
1da177e4 LT |
321 | }; |
322 | ||
323 | static int __devinit sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id) | |
324 | { | |
325 | return ide_setup_pci_device(dev, &sc1200_chipset); | |
326 | } | |
327 | ||
9cbcc5e3 BZ |
328 | static const struct pci_device_id sc1200_pci_tbl[] = { |
329 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SCx200_IDE), 0}, | |
1da177e4 LT |
330 | { 0, }, |
331 | }; | |
332 | MODULE_DEVICE_TABLE(pci, sc1200_pci_tbl); | |
333 | ||
334 | static struct pci_driver driver = { | |
335 | .name = "SC1200_IDE", | |
336 | .id_table = sc1200_pci_tbl, | |
337 | .probe = sc1200_init_one, | |
b86cc29d | 338 | #ifdef CONFIG_PM |
1da177e4 LT |
339 | .suspend = sc1200_suspend, |
340 | .resume = sc1200_resume, | |
b86cc29d | 341 | #endif |
1da177e4 LT |
342 | }; |
343 | ||
82ab1eec | 344 | static int __init sc1200_ide_init(void) |
1da177e4 LT |
345 | { |
346 | return ide_pci_register_driver(&driver); | |
347 | } | |
348 | ||
349 | module_init(sc1200_ide_init); | |
350 | ||
351 | MODULE_AUTHOR("Mark Lord"); | |
352 | MODULE_DESCRIPTION("PCI driver module for NS SC1200 IDE"); | |
353 | MODULE_LICENSE("GPL"); |