?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ext4: allow readdir()'s of large empty directories to be interrupted
[linux/fpc-iii.git] / drivers / ide / pdc202xx_old.c
blob224ad46d6cb22494972790fc9b37e0f6e75a2fd9
1 /*
2 * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2006-2007, 2009 MontaVista Software, Inc.
4 * Copyright (C) 2007-2010 Bartlomiej Zolnierkiewicz
5 *
6 * Portions Copyright (C) 1999 Promise Technology, Inc.
7 * Author: Frank Tiernan (frankt@promise.com)
8 * Released under terms of General Public License
9 */
10
11 #include <linux/types.h>
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/delay.h>
15 #include <linux/blkdev.h>
16 #include <linux/pci.h>
17 #include <linux/init.h>
18 #include <linux/ide.h>
19
20 #include <asm/io.h>
21
22 #define DRV_NAME "pdc202xx_old"
23
24 static void pdc202xx_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
25 {
26 struct pci_dev *dev = to_pci_dev(hwif->dev);
27 u8 drive_pci = 0x60 + (drive->dn << 2);
28 const u8 speed = drive->dma_mode;
29
30 u8 AP = 0, BP = 0, CP = 0;
31 u8 TA = 0, TB = 0, TC = 0;
32
33 pci_read_config_byte(dev, drive_pci, &AP);
34 pci_read_config_byte(dev, drive_pci + 1, &BP);
35 pci_read_config_byte(dev, drive_pci + 2, &CP);
36
37 switch(speed) {
38 case XFER_UDMA_5:
39 case XFER_UDMA_4: TB = 0x20; TC = 0x01; break;
40 case XFER_UDMA_2: TB = 0x20; TC = 0x01; break;
41 case XFER_UDMA_3:
42 case XFER_UDMA_1: TB = 0x40; TC = 0x02; break;
43 case XFER_UDMA_0:
44 case XFER_MW_DMA_2: TB = 0x60; TC = 0x03; break;
45 case XFER_MW_DMA_1: TB = 0x60; TC = 0x04; break;
46 case XFER_MW_DMA_0: TB = 0xE0; TC = 0x0F; break;
47 case XFER_PIO_4: TA = 0x01; TB = 0x04; break;
48 case XFER_PIO_3: TA = 0x02; TB = 0x06; break;
49 case XFER_PIO_2: TA = 0x03; TB = 0x08; break;
50 case XFER_PIO_1: TA = 0x05; TB = 0x0C; break;
51 case XFER_PIO_0:
52 default: TA = 0x09; TB = 0x13; break;
53 }
54
55 if (speed < XFER_SW_DMA_0) {
56 /*
57 * preserve SYNC_INT / ERDDY_EN bits while clearing
58 * Prefetch_EN / IORDY_EN / PA[3:0] bits of register A
59 */
60 AP &= ~0x3f;
61 if (ide_pio_need_iordy(drive, speed - XFER_PIO_0))
62 AP |= 0x20; /* set IORDY_EN bit */
63 if (drive->media == ide_disk)
64 AP |= 0x10; /* set Prefetch_EN bit */
65 /* clear PB[4:0] bits of register B */
66 BP &= ~0x1f;
67 pci_write_config_byte(dev, drive_pci, AP | TA);
68 pci_write_config_byte(dev, drive_pci + 1, BP | TB);
69 } else {
70 /* clear MB[2:0] bits of register B */
71 BP &= ~0xe0;
72 /* clear MC[3:0] bits of register C */
73 CP &= ~0x0f;
74 pci_write_config_byte(dev, drive_pci + 1, BP | TB);
75 pci_write_config_byte(dev, drive_pci + 2, CP | TC);
76 }
77 }
78
79 static void pdc202xx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
80 {
81 drive->dma_mode = drive->pio_mode;
82 pdc202xx_set_mode(hwif, drive);
83 }
84
85 static int pdc202xx_test_irq(ide_hwif_t *hwif)
86 {
87 struct pci_dev *dev = to_pci_dev(hwif->dev);
88 unsigned long high_16 = pci_resource_start(dev, 4);
89 u8 sc1d = inb(high_16 + 0x1d);
90
91 if (hwif->channel) {
92 /*
93 * bit 7: error, bit 6: interrupting,
94 * bit 5: FIFO full, bit 4: FIFO empty
95 */
96 return (sc1d & 0x40) ? 1 : 0;
97 } else {
98 /*
99 * bit 3: error, bit 2: interrupting,
100 * bit 1: FIFO full, bit 0: FIFO empty
101 */
102 return (sc1d & 0x04) ? 1 : 0;
103 }
104 }
105
106 static u8 pdc2026x_cable_detect(ide_hwif_t *hwif)
107 {
108 struct pci_dev *dev = to_pci_dev(hwif->dev);
109 u16 CIS, mask = hwif->channel ? (1 << 11) : (1 << 10);
110
111 pci_read_config_word(dev, 0x50, &CIS);
112
113 return (CIS & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80;
114 }
115
116 /*
117 * Set the control register to use the 66MHz system
118 * clock for UDMA 3/4/5 mode operation when necessary.
119 *
120 * FIXME: this register is shared by both channels, some locking is needed
121 *
122 * It may also be possible to leave the 66MHz clock on
123 * and readjust the timing parameters.
124 */
125 static void pdc_old_enable_66MHz_clock(ide_hwif_t *hwif)
126 {
127 unsigned long clock_reg = hwif->extra_base + 0x01;
128 u8 clock = inb(clock_reg);
129
130 outb(clock | (hwif->channel ? 0x08 : 0x02), clock_reg);
131 }
132
133 static void pdc_old_disable_66MHz_clock(ide_hwif_t *hwif)
134 {
135 unsigned long clock_reg = hwif->extra_base + 0x01;
136 u8 clock = inb(clock_reg);
137
138 outb(clock & ~(hwif->channel ? 0x08 : 0x02), clock_reg);
139 }
140
141 static void pdc2026x_init_hwif(ide_hwif_t *hwif)
142 {
143 pdc_old_disable_66MHz_clock(hwif);
144 }
145
146 static void pdc202xx_dma_start(ide_drive_t *drive)
147 {
148 if (drive->current_speed > XFER_UDMA_2)
149 pdc_old_enable_66MHz_clock(drive->hwif);
150 if (drive->media != ide_disk || (drive->dev_flags & IDE_DFLAG_LBA48)) {
151 ide_hwif_t *hwif = drive->hwif;
152 struct request *rq = hwif->rq;
153 unsigned long high_16 = hwif->extra_base - 16;
154 unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
155 u32 word_count = 0;
156 u8 clock = inb(high_16 + 0x11);
157
158 outb(clock | (hwif->channel ? 0x08 : 0x02), high_16 + 0x11);
159 word_count = (blk_rq_sectors(rq) << 8);
160 word_count = (rq_data_dir(rq) == READ) ?
161 word_count | 0x05000000 :
162 word_count | 0x06000000;
163 outl(word_count, atapi_reg);
164 }
165 ide_dma_start(drive);
166 }
167
168 static int pdc202xx_dma_end(ide_drive_t *drive)
169 {
170 if (drive->media != ide_disk || (drive->dev_flags & IDE_DFLAG_LBA48)) {
171 ide_hwif_t *hwif = drive->hwif;
172 unsigned long high_16 = hwif->extra_base - 16;
173 unsigned long atapi_reg = high_16 + (hwif->channel ? 0x24 : 0x20);
174 u8 clock = 0;
175
176 outl(0, atapi_reg); /* zero out extra */
177 clock = inb(high_16 + 0x11);
178 outb(clock & ~(hwif->channel ? 0x08:0x02), high_16 + 0x11);
179 }
180 if (drive->current_speed > XFER_UDMA_2)
181 pdc_old_disable_66MHz_clock(drive->hwif);
182 return ide_dma_end(drive);
183 }
184
185 static int init_chipset_pdc202xx(struct pci_dev *dev)
186 {
187 unsigned long dmabase = pci_resource_start(dev, 4);
188 u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0;
189
190 if (dmabase == 0)
191 goto out;
192
193 udma_speed_flag = inb(dmabase | 0x1f);
194 primary_mode = inb(dmabase | 0x1a);
195 secondary_mode = inb(dmabase | 0x1b);
196 printk(KERN_INFO "%s: (U)DMA Burst Bit %sABLED " \
197 "Primary %s Mode " \
198 "Secondary %s Mode.\n", pci_name(dev),
199 (udma_speed_flag & 1) ? "EN" : "DIS",
200 (primary_mode & 1) ? "MASTER" : "PCI",
201 (secondary_mode & 1) ? "MASTER" : "PCI" );
202
203 if (!(udma_speed_flag & 1)) {
204 printk(KERN_INFO "%s: FORCING BURST BIT 0x%02x->0x%02x ",
205 pci_name(dev), udma_speed_flag,
206 (udma_speed_flag|1));
207 outb(udma_speed_flag | 1, dmabase | 0x1f);
208 printk("%sACTIVE\n", (inb(dmabase | 0x1f) & 1) ? "" : "IN");
209 }
210 out:
211 return 0;
212 }
213
214 static void pdc202ata4_fixup_irq(struct pci_dev *dev, const char *name)
215 {
216 if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
217 u8 irq = 0, irq2 = 0;
218 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
219 /* 0xbc */
220 pci_read_config_byte(dev, (PCI_INTERRUPT_LINE)|0x80, &irq2);
221 if (irq != irq2) {
222 pci_write_config_byte(dev,
223 (PCI_INTERRUPT_LINE)|0x80, irq); /* 0xbc */
224 printk(KERN_INFO "%s %s: PCI config space interrupt "
225 "mirror fixed\n", name, pci_name(dev));
226 }
227 }
228 }
229
230 #define IDE_HFLAGS_PDC202XX \
231 (IDE_HFLAG_ERROR_STOPS_FIFO | \
232 IDE_HFLAG_OFF_BOARD)
233
234 static const struct ide_port_ops pdc20246_port_ops = {
235 .set_pio_mode = pdc202xx_set_pio_mode,
236 .set_dma_mode = pdc202xx_set_mode,
237 .test_irq = pdc202xx_test_irq,
238 };
239
240 static const struct ide_port_ops pdc2026x_port_ops = {
241 .set_pio_mode = pdc202xx_set_pio_mode,
242 .set_dma_mode = pdc202xx_set_mode,
243 .test_irq = pdc202xx_test_irq,
244 .cable_detect = pdc2026x_cable_detect,
245 };
246
247 static const struct ide_dma_ops pdc2026x_dma_ops = {
248 .dma_host_set = ide_dma_host_set,
249 .dma_setup = ide_dma_setup,
250 .dma_start = pdc202xx_dma_start,
251 .dma_end = pdc202xx_dma_end,
252 .dma_test_irq = ide_dma_test_irq,
253 .dma_lost_irq = ide_dma_lost_irq,
254 .dma_timer_expiry = ide_dma_sff_timer_expiry,
255 .dma_sff_read_status = ide_dma_sff_read_status,
256 };
257
258 #define DECLARE_PDC2026X_DEV(udma, sectors) \
259 { \
260 .name = DRV_NAME, \
261 .init_chipset = init_chipset_pdc202xx, \
262 .init_hwif = pdc2026x_init_hwif, \
263 .port_ops = &pdc2026x_port_ops, \
264 .dma_ops = &pdc2026x_dma_ops, \
265 .host_flags = IDE_HFLAGS_PDC202XX, \
266 .pio_mask = ATA_PIO4, \
267 .mwdma_mask = ATA_MWDMA2, \
268 .udma_mask = udma, \
269 .max_sectors = sectors, \
270 }
271
272 static const struct ide_port_info pdc202xx_chipsets[] = {
273 { /* 0: PDC20246 */
274 .name = DRV_NAME,
275 .init_chipset = init_chipset_pdc202xx,
276 .port_ops = &pdc20246_port_ops,
277 .dma_ops = &sff_dma_ops,
278 .host_flags = IDE_HFLAGS_PDC202XX,
279 .pio_mask = ATA_PIO4,
280 .mwdma_mask = ATA_MWDMA2,
281 .udma_mask = ATA_UDMA2,
282 },
283
284 /* 1: PDC2026{2,3} */
285 DECLARE_PDC2026X_DEV(ATA_UDMA4, 0),
286 /* 2: PDC2026{5,7}: UDMA5, limit LBA48 requests to 256 sectors */
287 DECLARE_PDC2026X_DEV(ATA_UDMA5, 256),
288 };
289
290 /**
291 * pdc202xx_init_one - called when a PDC202xx is found
292 * @dev: the pdc202xx device
293 * @id: the matching pci id
294 *
295 * Called when the PCI registration layer (or the IDE initialization)
296 * finds a device matching our IDE device tables.
297 */
298
299 static int pdc202xx_init_one(struct pci_dev *dev,
300 const struct pci_device_id *id)
301 {
302 const struct ide_port_info *d;
303 u8 idx = id->driver_data;
304
305 d = &pdc202xx_chipsets[idx];
306
307 if (idx < 2)
308 pdc202ata4_fixup_irq(dev, d->name);
309
310 if (dev->vendor == PCI_DEVICE_ID_PROMISE_20265) {
311 struct pci_dev *bridge = dev->bus->self;
312
313 if (bridge &&
314 bridge->vendor == PCI_VENDOR_ID_INTEL &&
315 (bridge->device == PCI_DEVICE_ID_INTEL_I960 ||
316 bridge->device == PCI_DEVICE_ID_INTEL_I960RM)) {
317 printk(KERN_INFO DRV_NAME " %s: skipping Promise "
318 "PDC20265 attached to I2O RAID controller\n",
319 pci_name(dev));
320 return -ENODEV;
321 }
322 }
323
324 return ide_pci_init_one(dev, d, NULL);
325 }
326
327 static const struct pci_device_id pdc202xx_pci_tbl[] = {
328 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
329 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
330 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20263), 1 },
331 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20265), 2 },
332 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20267), 2 },
333 { 0, },
334 };
335 MODULE_DEVICE_TABLE(pci, pdc202xx_pci_tbl);
336
337 static struct pci_driver pdc202xx_pci_driver = {
338 .name = "Promise_Old_IDE",
339 .id_table = pdc202xx_pci_tbl,
340 .probe = pdc202xx_init_one,
341 .remove = ide_pci_remove,
342 .suspend = ide_pci_suspend,
343 .resume = ide_pci_resume,
344 };
345
346 static int __init pdc202xx_ide_init(void)
347 {
348 return ide_pci_register_driver(&pdc202xx_pci_driver);
349 }
350
351 static void __exit pdc202xx_ide_exit(void)
352 {
353 pci_unregister_driver(&pdc202xx_pci_driver);
354 }
355
356 module_init(pdc202xx_ide_init);
357 module_exit(pdc202xx_ide_exit);
358
359 MODULE_AUTHOR("Andre Hedrick, Frank Tiernan, Bartlomiej Zolnierkiewicz");
360 MODULE_DESCRIPTION("PCI driver module for older Promise IDE");
361 MODULE_LICENSE("GPL");
Linux with added FPC-III support