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Merge branch 'dma_slave_direction' into next_test_dirn
[linux-2.6.git] / drivers / ata / sata_promise.c
blob000fcc99e01d0b935cec5dbbd962dc1370728fcc
1 /*
2 * sata_promise.c - Promise SATA
3 *
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Mikael Pettersson <mikpe@it.uu.se>
6 * Please ALWAYS copy linux-ide@vger.kernel.org
7 * on emails.
8 *
9 * Copyright 2003-2004 Red Hat, Inc.
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
15 * any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 *
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
29 *
30 * Hardware information only available under NDA.
31 *
32 */
33
34 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/gfp.h>
37 #include <linux/pci.h>
38 #include <linux/init.h>
39 #include <linux/blkdev.h>
40 #include <linux/delay.h>
41 #include <linux/interrupt.h>
42 #include <linux/device.h>
43 #include <scsi/scsi.h>
44 #include <scsi/scsi_host.h>
45 #include <scsi/scsi_cmnd.h>
46 #include <linux/libata.h>
47 #include "sata_promise.h"
48
49 #define DRV_NAME "sata_promise"
50 #define DRV_VERSION "2.12"
51
52 enum {
53 PDC_MAX_PORTS = 4,
54 PDC_MMIO_BAR = 3,
55 PDC_MAX_PRD = LIBATA_MAX_PRD - 1, /* -1 for ASIC PRD bug workaround */
56
57 /* host register offsets (from host->iomap[PDC_MMIO_BAR]) */
58 PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
59 PDC_FLASH_CTL = 0x44, /* Flash control register */
60 PDC_PCI_CTL = 0x48, /* PCI control/status reg */
61 PDC_SATA_PLUG_CSR = 0x6C, /* SATA Plug control/status reg */
62 PDC2_SATA_PLUG_CSR = 0x60, /* SATAII Plug control/status reg */
63 PDC_TBG_MODE = 0x41C, /* TBG mode (not SATAII) */
64 PDC_SLEW_CTL = 0x470, /* slew rate control reg (not SATAII) */
65
66 /* per-port ATA register offsets (from ap->ioaddr.cmd_addr) */
67 PDC_FEATURE = 0x04, /* Feature/Error reg (per port) */
68 PDC_SECTOR_COUNT = 0x08, /* Sector count reg (per port) */
69 PDC_SECTOR_NUMBER = 0x0C, /* Sector number reg (per port) */
70 PDC_CYLINDER_LOW = 0x10, /* Cylinder low reg (per port) */
71 PDC_CYLINDER_HIGH = 0x14, /* Cylinder high reg (per port) */
72 PDC_DEVICE = 0x18, /* Device/Head reg (per port) */
73 PDC_COMMAND = 0x1C, /* Command/status reg (per port) */
74 PDC_ALTSTATUS = 0x38, /* Alternate-status/device-control reg (per port) */
75 PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
76 PDC_GLOBAL_CTL = 0x48, /* Global control/status (per port) */
77 PDC_CTLSTAT = 0x60, /* IDE control and status (per port) */
78
79 /* per-port SATA register offsets (from ap->ioaddr.scr_addr) */
80 PDC_SATA_ERROR = 0x04,
81 PDC_PHYMODE4 = 0x14,
82 PDC_LINK_LAYER_ERRORS = 0x6C,
83 PDC_FPDMA_CTLSTAT = 0xD8,
84 PDC_INTERNAL_DEBUG_1 = 0xF8, /* also used for PATA */
85 PDC_INTERNAL_DEBUG_2 = 0xFC, /* also used for PATA */
86
87 /* PDC_FPDMA_CTLSTAT bit definitions */
88 PDC_FPDMA_CTLSTAT_RESET = 1 << 3,
89 PDC_FPDMA_CTLSTAT_DMASETUP_INT_FLAG = 1 << 10,
90 PDC_FPDMA_CTLSTAT_SETDB_INT_FLAG = 1 << 11,
91
92 /* PDC_GLOBAL_CTL bit definitions */
93 PDC_PH_ERR = (1 << 8), /* PCI error while loading packet */
94 PDC_SH_ERR = (1 << 9), /* PCI error while loading S/G table */
95 PDC_DH_ERR = (1 << 10), /* PCI error while loading data */
96 PDC2_HTO_ERR = (1 << 12), /* host bus timeout */
97 PDC2_ATA_HBA_ERR = (1 << 13), /* error during SATA DATA FIS transmission */
98 PDC2_ATA_DMA_CNT_ERR = (1 << 14), /* DMA DATA FIS size differs from S/G count */
99 PDC_OVERRUN_ERR = (1 << 19), /* S/G byte count larger than HD requires */
100 PDC_UNDERRUN_ERR = (1 << 20), /* S/G byte count less than HD requires */
101 PDC_DRIVE_ERR = (1 << 21), /* drive error */
102 PDC_PCI_SYS_ERR = (1 << 22), /* PCI system error */
103 PDC1_PCI_PARITY_ERR = (1 << 23), /* PCI parity error (from SATA150 driver) */
104 PDC1_ERR_MASK = PDC1_PCI_PARITY_ERR,
105 PDC2_ERR_MASK = PDC2_HTO_ERR | PDC2_ATA_HBA_ERR |
106 PDC2_ATA_DMA_CNT_ERR,
107 PDC_ERR_MASK = PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR |
108 PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR |
109 PDC_DRIVE_ERR | PDC_PCI_SYS_ERR |
110 PDC1_ERR_MASK | PDC2_ERR_MASK,
111
112 board_2037x = 0, /* FastTrak S150 TX2plus */
113 board_2037x_pata = 1, /* FastTrak S150 TX2plus PATA port */
114 board_20319 = 2, /* FastTrak S150 TX4 */
115 board_20619 = 3, /* FastTrak TX4000 */
116 board_2057x = 4, /* SATAII150 Tx2plus */
117 board_2057x_pata = 5, /* SATAII150 Tx2plus PATA port */
118 board_40518 = 6, /* SATAII150 Tx4 */
119
120 PDC_HAS_PATA = (1 << 1), /* PDC20375/20575 has PATA */
121
122 /* Sequence counter control registers bit definitions */
123 PDC_SEQCNTRL_INT_MASK = (1 << 5), /* Sequence Interrupt Mask */
124
125 /* Feature register values */
126 PDC_FEATURE_ATAPI_PIO = 0x00, /* ATAPI data xfer by PIO */
127 PDC_FEATURE_ATAPI_DMA = 0x01, /* ATAPI data xfer by DMA */
128
129 /* Device/Head register values */
130 PDC_DEVICE_SATA = 0xE0, /* Device/Head value for SATA devices */
131
132 /* PDC_CTLSTAT bit definitions */
133 PDC_DMA_ENABLE = (1 << 7),
134 PDC_IRQ_DISABLE = (1 << 10),
135 PDC_RESET = (1 << 11), /* HDMA reset */
136
137 PDC_COMMON_FLAGS = ATA_FLAG_PIO_POLLING,
138
139 /* ap->flags bits */
140 PDC_FLAG_GEN_II = (1 << 24),
141 PDC_FLAG_SATA_PATA = (1 << 25), /* supports SATA + PATA */
142 PDC_FLAG_4_PORTS = (1 << 26), /* 4 ports */
143 };
144
145 struct pdc_port_priv {
146 u8 *pkt;
147 dma_addr_t pkt_dma;
148 };
149
150 static int pdc_sata_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
151 static int pdc_sata_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
152 static int pdc_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
153 static int pdc_common_port_start(struct ata_port *ap);
154 static int pdc_sata_port_start(struct ata_port *ap);
155 static void pdc_qc_prep(struct ata_queued_cmd *qc);
156 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
157 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
158 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc);
159 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc);
160 static void pdc_irq_clear(struct ata_port *ap);
161 static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc);
162 static void pdc_freeze(struct ata_port *ap);
163 static void pdc_sata_freeze(struct ata_port *ap);
164 static void pdc_thaw(struct ata_port *ap);
165 static void pdc_sata_thaw(struct ata_port *ap);
166 static int pdc_pata_softreset(struct ata_link *link, unsigned int *class,
167 unsigned long deadline);
168 static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class,
169 unsigned long deadline);
170 static void pdc_error_handler(struct ata_port *ap);
171 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc);
172 static int pdc_pata_cable_detect(struct ata_port *ap);
173 static int pdc_sata_cable_detect(struct ata_port *ap);
174
175 static struct scsi_host_template pdc_ata_sht = {
176 ATA_BASE_SHT(DRV_NAME),
177 .sg_tablesize = PDC_MAX_PRD,
178 .dma_boundary = ATA_DMA_BOUNDARY,
179 };
180
181 static const struct ata_port_operations pdc_common_ops = {
182 .inherits = &ata_sff_port_ops,
183
184 .sff_tf_load = pdc_tf_load_mmio,
185 .sff_exec_command = pdc_exec_command_mmio,
186 .check_atapi_dma = pdc_check_atapi_dma,
187 .qc_prep = pdc_qc_prep,
188 .qc_issue = pdc_qc_issue,
189
190 .sff_irq_clear = pdc_irq_clear,
191 .lost_interrupt = ATA_OP_NULL,
192
193 .post_internal_cmd = pdc_post_internal_cmd,
194 .error_handler = pdc_error_handler,
195 };
196
197 static struct ata_port_operations pdc_sata_ops = {
198 .inherits = &pdc_common_ops,
199 .cable_detect = pdc_sata_cable_detect,
200 .freeze = pdc_sata_freeze,
201 .thaw = pdc_sata_thaw,
202 .scr_read = pdc_sata_scr_read,
203 .scr_write = pdc_sata_scr_write,
204 .port_start = pdc_sata_port_start,
205 .hardreset = pdc_sata_hardreset,
206 };
207
208 /* First-generation chips need a more restrictive ->check_atapi_dma op,
209 and ->freeze/thaw that ignore the hotplug controls. */
210 static struct ata_port_operations pdc_old_sata_ops = {
211 .inherits = &pdc_sata_ops,
212 .freeze = pdc_freeze,
213 .thaw = pdc_thaw,
214 .check_atapi_dma = pdc_old_sata_check_atapi_dma,
215 };
216
217 static struct ata_port_operations pdc_pata_ops = {
218 .inherits = &pdc_common_ops,
219 .cable_detect = pdc_pata_cable_detect,
220 .freeze = pdc_freeze,
221 .thaw = pdc_thaw,
222 .port_start = pdc_common_port_start,
223 .softreset = pdc_pata_softreset,
224 };
225
226 static const struct ata_port_info pdc_port_info[] = {
227 [board_2037x] =
228 {
229 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
230 PDC_FLAG_SATA_PATA,
231 .pio_mask = ATA_PIO4,
232 .mwdma_mask = ATA_MWDMA2,
233 .udma_mask = ATA_UDMA6,
234 .port_ops = &pdc_old_sata_ops,
235 },
236
237 [board_2037x_pata] =
238 {
239 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
240 .pio_mask = ATA_PIO4,
241 .mwdma_mask = ATA_MWDMA2,
242 .udma_mask = ATA_UDMA6,
243 .port_ops = &pdc_pata_ops,
244 },
245
246 [board_20319] =
247 {
248 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
249 PDC_FLAG_4_PORTS,
250 .pio_mask = ATA_PIO4,
251 .mwdma_mask = ATA_MWDMA2,
252 .udma_mask = ATA_UDMA6,
253 .port_ops = &pdc_old_sata_ops,
254 },
255
256 [board_20619] =
257 {
258 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
259 PDC_FLAG_4_PORTS,
260 .pio_mask = ATA_PIO4,
261 .mwdma_mask = ATA_MWDMA2,
262 .udma_mask = ATA_UDMA6,
263 .port_ops = &pdc_pata_ops,
264 },
265
266 [board_2057x] =
267 {
268 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
269 PDC_FLAG_GEN_II | PDC_FLAG_SATA_PATA,
270 .pio_mask = ATA_PIO4,
271 .mwdma_mask = ATA_MWDMA2,
272 .udma_mask = ATA_UDMA6,
273 .port_ops = &pdc_sata_ops,
274 },
275
276 [board_2057x_pata] =
277 {
278 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
279 PDC_FLAG_GEN_II,
280 .pio_mask = ATA_PIO4,
281 .mwdma_mask = ATA_MWDMA2,
282 .udma_mask = ATA_UDMA6,
283 .port_ops = &pdc_pata_ops,
284 },
285
286 [board_40518] =
287 {
288 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
289 PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS,
290 .pio_mask = ATA_PIO4,
291 .mwdma_mask = ATA_MWDMA2,
292 .udma_mask = ATA_UDMA6,
293 .port_ops = &pdc_sata_ops,
294 },
295 };
296
297 static const struct pci_device_id pdc_ata_pci_tbl[] = {
298 { PCI_VDEVICE(PROMISE, 0x3371), board_2037x },
299 { PCI_VDEVICE(PROMISE, 0x3373), board_2037x },
300 { PCI_VDEVICE(PROMISE, 0x3375), board_2037x },
301 { PCI_VDEVICE(PROMISE, 0x3376), board_2037x },
302 { PCI_VDEVICE(PROMISE, 0x3570), board_2057x },
303 { PCI_VDEVICE(PROMISE, 0x3571), board_2057x },
304 { PCI_VDEVICE(PROMISE, 0x3574), board_2057x },
305 { PCI_VDEVICE(PROMISE, 0x3577), board_2057x },
306 { PCI_VDEVICE(PROMISE, 0x3d73), board_2057x },
307 { PCI_VDEVICE(PROMISE, 0x3d75), board_2057x },
308
309 { PCI_VDEVICE(PROMISE, 0x3318), board_20319 },
310 { PCI_VDEVICE(PROMISE, 0x3319), board_20319 },
311 { PCI_VDEVICE(PROMISE, 0x3515), board_40518 },
312 { PCI_VDEVICE(PROMISE, 0x3519), board_40518 },
313 { PCI_VDEVICE(PROMISE, 0x3d17), board_40518 },
314 { PCI_VDEVICE(PROMISE, 0x3d18), board_40518 },
315
316 { PCI_VDEVICE(PROMISE, 0x6629), board_20619 },
317
318 { } /* terminate list */
319 };
320
321 static struct pci_driver pdc_ata_pci_driver = {
322 .name = DRV_NAME,
323 .id_table = pdc_ata_pci_tbl,
324 .probe = pdc_ata_init_one,
325 .remove = ata_pci_remove_one,
326 };
327
328 static int pdc_common_port_start(struct ata_port *ap)
329 {
330 struct device *dev = ap->host->dev;
331 struct pdc_port_priv *pp;
332 int rc;
333
334 /* we use the same prd table as bmdma, allocate it */
335 rc = ata_bmdma_port_start(ap);
336 if (rc)
337 return rc;
338
339 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
340 if (!pp)
341 return -ENOMEM;
342
343 pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
344 if (!pp->pkt)
345 return -ENOMEM;
346
347 ap->private_data = pp;
348
349 return 0;
350 }
351
352 static int pdc_sata_port_start(struct ata_port *ap)
353 {
354 int rc;
355
356 rc = pdc_common_port_start(ap);
357 if (rc)
358 return rc;
359
360 /* fix up PHYMODE4 align timing */
361 if (ap->flags & PDC_FLAG_GEN_II) {
362 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
363 unsigned int tmp;
364
365 tmp = readl(sata_mmio + PDC_PHYMODE4);
366 tmp = (tmp & ~3) | 1; /* set bits 1:0 = 0:1 */
367 writel(tmp, sata_mmio + PDC_PHYMODE4);
368 }
369
370 return 0;
371 }
372
373 static void pdc_fpdma_clear_interrupt_flag(struct ata_port *ap)
374 {
375 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
376 u32 tmp;
377
378 tmp = readl(sata_mmio + PDC_FPDMA_CTLSTAT);
379 tmp |= PDC_FPDMA_CTLSTAT_DMASETUP_INT_FLAG;
380 tmp |= PDC_FPDMA_CTLSTAT_SETDB_INT_FLAG;
381
382 /* It's not allowed to write to the entire FPDMA_CTLSTAT register
383 when NCQ is running. So do a byte-sized write to bits 10 and 11. */
384 writeb(tmp >> 8, sata_mmio + PDC_FPDMA_CTLSTAT + 1);
385 readb(sata_mmio + PDC_FPDMA_CTLSTAT + 1); /* flush */
386 }
387
388 static void pdc_fpdma_reset(struct ata_port *ap)
389 {
390 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
391 u8 tmp;
392
393 tmp = (u8)readl(sata_mmio + PDC_FPDMA_CTLSTAT);
394 tmp &= 0x7F;
395 tmp |= PDC_FPDMA_CTLSTAT_RESET;
396 writeb(tmp, sata_mmio + PDC_FPDMA_CTLSTAT);
397 readl(sata_mmio + PDC_FPDMA_CTLSTAT); /* flush */
398 udelay(100);
399 tmp &= ~PDC_FPDMA_CTLSTAT_RESET;
400 writeb(tmp, sata_mmio + PDC_FPDMA_CTLSTAT);
401 readl(sata_mmio + PDC_FPDMA_CTLSTAT); /* flush */
402
403 pdc_fpdma_clear_interrupt_flag(ap);
404 }
405
406 static void pdc_not_at_command_packet_phase(struct ata_port *ap)
407 {
408 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
409 unsigned int i;
410 u32 tmp;
411
412 /* check not at ASIC packet command phase */
413 for (i = 0; i < 100; ++i) {
414 writel(0, sata_mmio + PDC_INTERNAL_DEBUG_1);
415 tmp = readl(sata_mmio + PDC_INTERNAL_DEBUG_2);
416 if ((tmp & 0xF) != 1)
417 break;
418 udelay(100);
419 }
420 }
421
422 static void pdc_clear_internal_debug_record_error_register(struct ata_port *ap)
423 {
424 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
425
426 writel(0xffffffff, sata_mmio + PDC_SATA_ERROR);
427 writel(0xffff0000, sata_mmio + PDC_LINK_LAYER_ERRORS);
428 }
429
430 static void pdc_reset_port(struct ata_port *ap)
431 {
432 void __iomem *ata_ctlstat_mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT;
433 unsigned int i;
434 u32 tmp;
435
436 if (ap->flags & PDC_FLAG_GEN_II)
437 pdc_not_at_command_packet_phase(ap);
438
439 tmp = readl(ata_ctlstat_mmio);
440 tmp |= PDC_RESET;
441 writel(tmp, ata_ctlstat_mmio);
442
443 for (i = 11; i > 0; i--) {
444 tmp = readl(ata_ctlstat_mmio);
445 if (tmp & PDC_RESET)
446 break;
447
448 udelay(100);
449
450 tmp |= PDC_RESET;
451 writel(tmp, ata_ctlstat_mmio);
452 }
453
454 tmp &= ~PDC_RESET;
455 writel(tmp, ata_ctlstat_mmio);
456 readl(ata_ctlstat_mmio); /* flush */
457
458 if (sata_scr_valid(&ap->link) && (ap->flags & PDC_FLAG_GEN_II)) {
459 pdc_fpdma_reset(ap);
460 pdc_clear_internal_debug_record_error_register(ap);
461 }
462 }
463
464 static int pdc_pata_cable_detect(struct ata_port *ap)
465 {
466 u8 tmp;
467 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
468
469 tmp = readb(ata_mmio + PDC_CTLSTAT + 3);
470 if (tmp & 0x01)
471 return ATA_CBL_PATA40;
472 return ATA_CBL_PATA80;
473 }
474
475 static int pdc_sata_cable_detect(struct ata_port *ap)
476 {
477 return ATA_CBL_SATA;
478 }
479
480 static int pdc_sata_scr_read(struct ata_link *link,
481 unsigned int sc_reg, u32 *val)
482 {
483 if (sc_reg > SCR_CONTROL)
484 return -EINVAL;
485 *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4));
486 return 0;
487 }
488
489 static int pdc_sata_scr_write(struct ata_link *link,
490 unsigned int sc_reg, u32 val)
491 {
492 if (sc_reg > SCR_CONTROL)
493 return -EINVAL;
494 writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4));
495 return 0;
496 }
497
498 static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
499 {
500 struct ata_port *ap = qc->ap;
501 dma_addr_t sg_table = ap->bmdma_prd_dma;
502 unsigned int cdb_len = qc->dev->cdb_len;
503 u8 *cdb = qc->cdb;
504 struct pdc_port_priv *pp = ap->private_data;
505 u8 *buf = pp->pkt;
506 __le32 *buf32 = (__le32 *) buf;
507 unsigned int dev_sel, feature;
508
509 /* set control bits (byte 0), zero delay seq id (byte 3),
510 * and seq id (byte 2)
511 */
512 switch (qc->tf.protocol) {
513 case ATAPI_PROT_DMA:
514 if (!(qc->tf.flags & ATA_TFLAG_WRITE))
515 buf32[0] = cpu_to_le32(PDC_PKT_READ);
516 else
517 buf32[0] = 0;
518 break;
519 case ATAPI_PROT_NODATA:
520 buf32[0] = cpu_to_le32(PDC_PKT_NODATA);
521 break;
522 default:
523 BUG();
524 break;
525 }
526 buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */
527 buf32[2] = 0; /* no next-packet */
528
529 /* select drive */
530 if (sata_scr_valid(&ap->link))
531 dev_sel = PDC_DEVICE_SATA;
532 else
533 dev_sel = qc->tf.device;
534
535 buf[12] = (1 << 5) | ATA_REG_DEVICE;
536 buf[13] = dev_sel;
537 buf[14] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_CLEAR_BSY;
538 buf[15] = dev_sel; /* once more, waiting for BSY to clear */
539
540 buf[16] = (1 << 5) | ATA_REG_NSECT;
541 buf[17] = qc->tf.nsect;
542 buf[18] = (1 << 5) | ATA_REG_LBAL;
543 buf[19] = qc->tf.lbal;
544
545 /* set feature and byte counter registers */
546 if (qc->tf.protocol != ATAPI_PROT_DMA)
547 feature = PDC_FEATURE_ATAPI_PIO;
548 else
549 feature = PDC_FEATURE_ATAPI_DMA;
550
551 buf[20] = (1 << 5) | ATA_REG_FEATURE;
552 buf[21] = feature;
553 buf[22] = (1 << 5) | ATA_REG_BYTEL;
554 buf[23] = qc->tf.lbam;
555 buf[24] = (1 << 5) | ATA_REG_BYTEH;
556 buf[25] = qc->tf.lbah;
557
558 /* send ATAPI packet command 0xA0 */
559 buf[26] = (1 << 5) | ATA_REG_CMD;
560 buf[27] = qc->tf.command;
561
562 /* select drive and check DRQ */
563 buf[28] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_WAIT_DRDY;
564 buf[29] = dev_sel;
565
566 /* we can represent cdb lengths 2/4/6/8/10/12/14/16 */
567 BUG_ON(cdb_len & ~0x1E);
568
569 /* append the CDB as the final part */
570 buf[30] = (((cdb_len >> 1) & 7) << 5) | ATA_REG_DATA | PDC_LAST_REG;
571 memcpy(buf+31, cdb, cdb_len);
572 }
573
574 /**
575 * pdc_fill_sg - Fill PCI IDE PRD table
576 * @qc: Metadata associated with taskfile to be transferred
577 *
578 * Fill PCI IDE PRD (scatter-gather) table with segments
579 * associated with the current disk command.
580 * Make sure hardware does not choke on it.
581 *
582 * LOCKING:
583 * spin_lock_irqsave(host lock)
584 *
585 */
586 static void pdc_fill_sg(struct ata_queued_cmd *qc)
587 {
588 struct ata_port *ap = qc->ap;
589 struct ata_bmdma_prd *prd = ap->bmdma_prd;
590 struct scatterlist *sg;
591 const u32 SG_COUNT_ASIC_BUG = 41*4;
592 unsigned int si, idx;
593 u32 len;
594
595 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
596 return;
597
598 idx = 0;
599 for_each_sg(qc->sg, sg, qc->n_elem, si) {
600 u32 addr, offset;
601 u32 sg_len;
602
603 /* determine if physical DMA addr spans 64K boundary.
604 * Note h/w doesn't support 64-bit, so we unconditionally
605 * truncate dma_addr_t to u32.
606 */
607 addr = (u32) sg_dma_address(sg);
608 sg_len = sg_dma_len(sg);
609
610 while (sg_len) {
611 offset = addr & 0xffff;
612 len = sg_len;
613 if ((offset + sg_len) > 0x10000)
614 len = 0x10000 - offset;
615
616 prd[idx].addr = cpu_to_le32(addr);
617 prd[idx].flags_len = cpu_to_le32(len & 0xffff);
618 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
619
620 idx++;
621 sg_len -= len;
622 addr += len;
623 }
624 }
625
626 len = le32_to_cpu(prd[idx - 1].flags_len);
627
628 if (len > SG_COUNT_ASIC_BUG) {
629 u32 addr;
630
631 VPRINTK("Splitting last PRD.\n");
632
633 addr = le32_to_cpu(prd[idx - 1].addr);
634 prd[idx - 1].flags_len = cpu_to_le32(len - SG_COUNT_ASIC_BUG);
635 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx - 1, addr, SG_COUNT_ASIC_BUG);
636
637 addr = addr + len - SG_COUNT_ASIC_BUG;
638 len = SG_COUNT_ASIC_BUG;
639 prd[idx].addr = cpu_to_le32(addr);
640 prd[idx].flags_len = cpu_to_le32(len);
641 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
642
643 idx++;
644 }
645
646 prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
647 }
648
649 static void pdc_qc_prep(struct ata_queued_cmd *qc)
650 {
651 struct pdc_port_priv *pp = qc->ap->private_data;
652 unsigned int i;
653
654 VPRINTK("ENTER\n");
655
656 switch (qc->tf.protocol) {
657 case ATA_PROT_DMA:
658 pdc_fill_sg(qc);
659 /*FALLTHROUGH*/
660 case ATA_PROT_NODATA:
661 i = pdc_pkt_header(&qc->tf, qc->ap->bmdma_prd_dma,
662 qc->dev->devno, pp->pkt);
663 if (qc->tf.flags & ATA_TFLAG_LBA48)
664 i = pdc_prep_lba48(&qc->tf, pp->pkt, i);
665 else
666 i = pdc_prep_lba28(&qc->tf, pp->pkt, i);
667 pdc_pkt_footer(&qc->tf, pp->pkt, i);
668 break;
669 case ATAPI_PROT_PIO:
670 pdc_fill_sg(qc);
671 break;
672 case ATAPI_PROT_DMA:
673 pdc_fill_sg(qc);
674 /*FALLTHROUGH*/
675 case ATAPI_PROT_NODATA:
676 pdc_atapi_pkt(qc);
677 break;
678 default:
679 break;
680 }
681 }
682
683 static int pdc_is_sataii_tx4(unsigned long flags)
684 {
685 const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS;
686 return (flags & mask) == mask;
687 }
688
689 static unsigned int pdc_port_no_to_ata_no(unsigned int port_no,
690 int is_sataii_tx4)
691 {
692 static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2};
693 return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no;
694 }
695
696 static unsigned int pdc_sata_nr_ports(const struct ata_port *ap)
697 {
698 return (ap->flags & PDC_FLAG_4_PORTS) ? 4 : 2;
699 }
700
701 static unsigned int pdc_sata_ata_port_to_ata_no(const struct ata_port *ap)
702 {
703 const struct ata_host *host = ap->host;
704 unsigned int nr_ports = pdc_sata_nr_ports(ap);
705 unsigned int i;
706
707 for (i = 0; i < nr_ports && host->ports[i] != ap; ++i)
708 ;
709 BUG_ON(i >= nr_ports);
710 return pdc_port_no_to_ata_no(i, pdc_is_sataii_tx4(ap->flags));
711 }
712
713 static void pdc_freeze(struct ata_port *ap)
714 {
715 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
716 u32 tmp;
717
718 tmp = readl(ata_mmio + PDC_CTLSTAT);
719 tmp |= PDC_IRQ_DISABLE;
720 tmp &= ~PDC_DMA_ENABLE;
721 writel(tmp, ata_mmio + PDC_CTLSTAT);
722 readl(ata_mmio + PDC_CTLSTAT); /* flush */
723 }
724
725 static void pdc_sata_freeze(struct ata_port *ap)
726 {
727 struct ata_host *host = ap->host;
728 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
729 unsigned int hotplug_offset = PDC2_SATA_PLUG_CSR;
730 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
731 u32 hotplug_status;
732
733 /* Disable hotplug events on this port.
734 *
735 * Locking:
736 * 1) hotplug register accesses must be serialised via host->lock
737 * 2) ap->lock == &ap->host->lock
738 * 3) ->freeze() and ->thaw() are called with ap->lock held
739 */
740 hotplug_status = readl(host_mmio + hotplug_offset);
741 hotplug_status |= 0x11 << (ata_no + 16);
742 writel(hotplug_status, host_mmio + hotplug_offset);
743 readl(host_mmio + hotplug_offset); /* flush */
744
745 pdc_freeze(ap);
746 }
747
748 static void pdc_thaw(struct ata_port *ap)
749 {
750 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
751 u32 tmp;
752
753 /* clear IRQ */
754 readl(ata_mmio + PDC_COMMAND);
755
756 /* turn IRQ back on */
757 tmp = readl(ata_mmio + PDC_CTLSTAT);
758 tmp &= ~PDC_IRQ_DISABLE;
759 writel(tmp, ata_mmio + PDC_CTLSTAT);
760 readl(ata_mmio + PDC_CTLSTAT); /* flush */
761 }
762
763 static void pdc_sata_thaw(struct ata_port *ap)
764 {
765 struct ata_host *host = ap->host;
766 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
767 unsigned int hotplug_offset = PDC2_SATA_PLUG_CSR;
768 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
769 u32 hotplug_status;
770
771 pdc_thaw(ap);
772
773 /* Enable hotplug events on this port.
774 * Locking: see pdc_sata_freeze().
775 */
776 hotplug_status = readl(host_mmio + hotplug_offset);
777 hotplug_status |= 0x11 << ata_no;
778 hotplug_status &= ~(0x11 << (ata_no + 16));
779 writel(hotplug_status, host_mmio + hotplug_offset);
780 readl(host_mmio + hotplug_offset); /* flush */
781 }
782
783 static int pdc_pata_softreset(struct ata_link *link, unsigned int *class,
784 unsigned long deadline)
785 {
786 pdc_reset_port(link->ap);
787 return ata_sff_softreset(link, class, deadline);
788 }
789
790 static unsigned int pdc_ata_port_to_ata_no(const struct ata_port *ap)
791 {
792 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
793 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
794
795 /* ata_mmio == host_mmio + 0x200 + ata_no * 0x80 */
796 return (ata_mmio - host_mmio - 0x200) / 0x80;
797 }
798
799 static void pdc_hard_reset_port(struct ata_port *ap)
800 {
801 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
802 void __iomem *pcictl_b1_mmio = host_mmio + PDC_PCI_CTL + 1;
803 unsigned int ata_no = pdc_ata_port_to_ata_no(ap);
804 u8 tmp;
805
806 spin_lock(&ap->host->lock);
807
808 tmp = readb(pcictl_b1_mmio);
809 tmp &= ~(0x10 << ata_no);
810 writeb(tmp, pcictl_b1_mmio);
811 readb(pcictl_b1_mmio); /* flush */
812 udelay(100);
813 tmp |= (0x10 << ata_no);
814 writeb(tmp, pcictl_b1_mmio);
815 readb(pcictl_b1_mmio); /* flush */
816
817 spin_unlock(&ap->host->lock);
818 }
819
820 static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class,
821 unsigned long deadline)
822 {
823 if (link->ap->flags & PDC_FLAG_GEN_II)
824 pdc_not_at_command_packet_phase(link->ap);
825 /* hotplug IRQs should have been masked by pdc_sata_freeze() */
826 pdc_hard_reset_port(link->ap);
827 pdc_reset_port(link->ap);
828
829 /* sata_promise can't reliably acquire the first D2H Reg FIS
830 * after hardreset. Do non-waiting hardreset and request
831 * follow-up SRST.
832 */
833 return sata_std_hardreset(link, class, deadline);
834 }
835
836 static void pdc_error_handler(struct ata_port *ap)
837 {
838 if (!(ap->pflags & ATA_PFLAG_FROZEN))
839 pdc_reset_port(ap);
840
841 ata_sff_error_handler(ap);
842 }
843
844 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc)
845 {
846 struct ata_port *ap = qc->ap;
847
848 /* make DMA engine forget about the failed command */
849 if (qc->flags & ATA_QCFLAG_FAILED)
850 pdc_reset_port(ap);
851 }
852
853 static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
854 u32 port_status, u32 err_mask)
855 {
856 struct ata_eh_info *ehi = &ap->link.eh_info;
857 unsigned int ac_err_mask = 0;
858
859 ata_ehi_clear_desc(ehi);
860 ata_ehi_push_desc(ehi, "port_status 0x%08x", port_status);
861 port_status &= err_mask;
862
863 if (port_status & PDC_DRIVE_ERR)
864 ac_err_mask |= AC_ERR_DEV;
865 if (port_status & (PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR))
866 ac_err_mask |= AC_ERR_OTHER;
867 if (port_status & (PDC2_ATA_HBA_ERR | PDC2_ATA_DMA_CNT_ERR))
868 ac_err_mask |= AC_ERR_ATA_BUS;
869 if (port_status & (PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR | PDC2_HTO_ERR
870 | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
871 ac_err_mask |= AC_ERR_HOST_BUS;
872
873 if (sata_scr_valid(&ap->link)) {
874 u32 serror;
875
876 pdc_sata_scr_read(&ap->link, SCR_ERROR, &serror);
877 ehi->serror |= serror;
878 }
879
880 qc->err_mask |= ac_err_mask;
881
882 pdc_reset_port(ap);
883
884 ata_port_abort(ap);
885 }
886
887 static unsigned int pdc_host_intr(struct ata_port *ap,
888 struct ata_queued_cmd *qc)
889 {
890 unsigned int handled = 0;
891 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
892 u32 port_status, err_mask;
893
894 err_mask = PDC_ERR_MASK;
895 if (ap->flags & PDC_FLAG_GEN_II)
896 err_mask &= ~PDC1_ERR_MASK;
897 else
898 err_mask &= ~PDC2_ERR_MASK;
899 port_status = readl(ata_mmio + PDC_GLOBAL_CTL);
900 if (unlikely(port_status & err_mask)) {
901 pdc_error_intr(ap, qc, port_status, err_mask);
902 return 1;
903 }
904
905 switch (qc->tf.protocol) {
906 case ATA_PROT_DMA:
907 case ATA_PROT_NODATA:
908 case ATAPI_PROT_DMA:
909 case ATAPI_PROT_NODATA:
910 qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
911 ata_qc_complete(qc);
912 handled = 1;
913 break;
914 default:
915 ap->stats.idle_irq++;
916 break;
917 }
918
919 return handled;
920 }
921
922 static void pdc_irq_clear(struct ata_port *ap)
923 {
924 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
925
926 readl(ata_mmio + PDC_COMMAND);
927 }
928
929 static irqreturn_t pdc_interrupt(int irq, void *dev_instance)
930 {
931 struct ata_host *host = dev_instance;
932 struct ata_port *ap;
933 u32 mask = 0;
934 unsigned int i, tmp;
935 unsigned int handled = 0;
936 void __iomem *host_mmio;
937 unsigned int hotplug_offset, ata_no;
938 u32 hotplug_status;
939 int is_sataii_tx4;
940
941 VPRINTK("ENTER\n");
942
943 if (!host || !host->iomap[PDC_MMIO_BAR]) {
944 VPRINTK("QUICK EXIT\n");
945 return IRQ_NONE;
946 }
947
948 host_mmio = host->iomap[PDC_MMIO_BAR];
949
950 spin_lock(&host->lock);
951
952 /* read and clear hotplug flags for all ports */
953 if (host->ports[0]->flags & PDC_FLAG_GEN_II) {
954 hotplug_offset = PDC2_SATA_PLUG_CSR;
955 hotplug_status = readl(host_mmio + hotplug_offset);
956 if (hotplug_status & 0xff)
957 writel(hotplug_status | 0xff, host_mmio + hotplug_offset);
958 hotplug_status &= 0xff; /* clear uninteresting bits */
959 } else
960 hotplug_status = 0;
961
962 /* reading should also clear interrupts */
963 mask = readl(host_mmio + PDC_INT_SEQMASK);
964
965 if (mask == 0xffffffff && hotplug_status == 0) {
966 VPRINTK("QUICK EXIT 2\n");
967 goto done_irq;
968 }
969
970 mask &= 0xffff; /* only 16 SEQIDs possible */
971 if (mask == 0 && hotplug_status == 0) {
972 VPRINTK("QUICK EXIT 3\n");
973 goto done_irq;
974 }
975
976 writel(mask, host_mmio + PDC_INT_SEQMASK);
977
978 is_sataii_tx4 = pdc_is_sataii_tx4(host->ports[0]->flags);
979
980 for (i = 0; i < host->n_ports; i++) {
981 VPRINTK("port %u\n", i);
982 ap = host->ports[i];
983
984 /* check for a plug or unplug event */
985 ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
986 tmp = hotplug_status & (0x11 << ata_no);
987 if (tmp) {
988 struct ata_eh_info *ehi = &ap->link.eh_info;
989 ata_ehi_clear_desc(ehi);
990 ata_ehi_hotplugged(ehi);
991 ata_ehi_push_desc(ehi, "hotplug_status %#x", tmp);
992 ata_port_freeze(ap);
993 ++handled;
994 continue;
995 }
996
997 /* check for a packet interrupt */
998 tmp = mask & (1 << (i + 1));
999 if (tmp) {
1000 struct ata_queued_cmd *qc;
1001
1002 qc = ata_qc_from_tag(ap, ap->link.active_tag);
1003 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
1004 handled += pdc_host_intr(ap, qc);
1005 }
1006 }
1007
1008 VPRINTK("EXIT\n");
1009
1010 done_irq:
1011 spin_unlock(&host->lock);
1012 return IRQ_RETVAL(handled);
1013 }
1014
1015 static void pdc_packet_start(struct ata_queued_cmd *qc)
1016 {
1017 struct ata_port *ap = qc->ap;
1018 struct pdc_port_priv *pp = ap->private_data;
1019 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
1020 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
1021 unsigned int port_no = ap->port_no;
1022 u8 seq = (u8) (port_no + 1);
1023
1024 VPRINTK("ENTER, ap %p\n", ap);
1025
1026 writel(0x00000001, host_mmio + (seq * 4));
1027 readl(host_mmio + (seq * 4)); /* flush */
1028
1029 pp->pkt[2] = seq;
1030 wmb(); /* flush PRD, pkt writes */
1031 writel(pp->pkt_dma, ata_mmio + PDC_PKT_SUBMIT);
1032 readl(ata_mmio + PDC_PKT_SUBMIT); /* flush */
1033 }
1034
1035 static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc)
1036 {
1037 switch (qc->tf.protocol) {
1038 case ATAPI_PROT_NODATA:
1039 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
1040 break;
1041 /*FALLTHROUGH*/
1042 case ATA_PROT_NODATA:
1043 if (qc->tf.flags & ATA_TFLAG_POLLING)
1044 break;
1045 /*FALLTHROUGH*/
1046 case ATAPI_PROT_DMA:
1047 case ATA_PROT_DMA:
1048 pdc_packet_start(qc);
1049 return 0;
1050 default:
1051 break;
1052 }
1053 return ata_sff_qc_issue(qc);
1054 }
1055
1056 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
1057 {
1058 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
1059 ata_sff_tf_load(ap, tf);
1060 }
1061
1062 static void pdc_exec_command_mmio(struct ata_port *ap,
1063 const struct ata_taskfile *tf)
1064 {
1065 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
1066 ata_sff_exec_command(ap, tf);
1067 }
1068
1069 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
1070 {
1071 u8 *scsicmd = qc->scsicmd->cmnd;
1072 int pio = 1; /* atapi dma off by default */
1073
1074 /* Whitelist commands that may use DMA. */
1075 switch (scsicmd[0]) {
1076 case WRITE_12:
1077 case WRITE_10:
1078 case WRITE_6:
1079 case READ_12:
1080 case READ_10:
1081 case READ_6:
1082 case 0xad: /* READ_DVD_STRUCTURE */
1083 case 0xbe: /* READ_CD */
1084 pio = 0;
1085 }
1086 /* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */
1087 if (scsicmd[0] == WRITE_10) {
1088 unsigned int lba =
1089 (scsicmd[2] << 24) |
1090 (scsicmd[3] << 16) |
1091 (scsicmd[4] << 8) |
1092 scsicmd[5];
1093 if (lba >= 0xFFFF4FA2)
1094 pio = 1;
1095 }
1096 return pio;
1097 }
1098
1099 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc)
1100 {
1101 /* First generation chips cannot use ATAPI DMA on SATA ports */
1102 return 1;
1103 }
1104
1105 static void pdc_ata_setup_port(struct ata_port *ap,
1106 void __iomem *base, void __iomem *scr_addr)
1107 {
1108 ap->ioaddr.cmd_addr = base;
1109 ap->ioaddr.data_addr = base;
1110 ap->ioaddr.feature_addr =
1111 ap->ioaddr.error_addr = base + 0x4;
1112 ap->ioaddr.nsect_addr = base + 0x8;
1113 ap->ioaddr.lbal_addr = base + 0xc;
1114 ap->ioaddr.lbam_addr = base + 0x10;
1115 ap->ioaddr.lbah_addr = base + 0x14;
1116 ap->ioaddr.device_addr = base + 0x18;
1117 ap->ioaddr.command_addr =
1118 ap->ioaddr.status_addr = base + 0x1c;
1119 ap->ioaddr.altstatus_addr =
1120 ap->ioaddr.ctl_addr = base + 0x38;
1121 ap->ioaddr.scr_addr = scr_addr;
1122 }
1123
1124 static void pdc_host_init(struct ata_host *host)
1125 {
1126 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
1127 int is_gen2 = host->ports[0]->flags & PDC_FLAG_GEN_II;
1128 int hotplug_offset;
1129 u32 tmp;
1130
1131 if (is_gen2)
1132 hotplug_offset = PDC2_SATA_PLUG_CSR;
1133 else
1134 hotplug_offset = PDC_SATA_PLUG_CSR;
1135
1136 /*
1137 * Except for the hotplug stuff, this is voodoo from the
1138 * Promise driver. Label this entire section
1139 * "TODO: figure out why we do this"
1140 */
1141
1142 /* enable BMR_BURST, maybe change FIFO_SHD to 8 dwords */
1143 tmp = readl(host_mmio + PDC_FLASH_CTL);
1144 tmp |= 0x02000; /* bit 13 (enable bmr burst) */
1145 if (!is_gen2)
1146 tmp |= 0x10000; /* bit 16 (fifo threshold at 8 dw) */
1147 writel(tmp, host_mmio + PDC_FLASH_CTL);
1148
1149 /* clear plug/unplug flags for all ports */
1150 tmp = readl(host_mmio + hotplug_offset);
1151 writel(tmp | 0xff, host_mmio + hotplug_offset);
1152
1153 tmp = readl(host_mmio + hotplug_offset);
1154 if (is_gen2) /* unmask plug/unplug ints */
1155 writel(tmp & ~0xff0000, host_mmio + hotplug_offset);
1156 else /* mask plug/unplug ints */
1157 writel(tmp | 0xff0000, host_mmio + hotplug_offset);
1158
1159 /* don't initialise TBG or SLEW on 2nd generation chips */
1160 if (is_gen2)
1161 return;
1162
1163 /* reduce TBG clock to 133 Mhz. */
1164 tmp = readl(host_mmio + PDC_TBG_MODE);
1165 tmp &= ~0x30000; /* clear bit 17, 16*/
1166 tmp |= 0x10000; /* set bit 17:16 = 0:1 */
1167 writel(tmp, host_mmio + PDC_TBG_MODE);
1168
1169 readl(host_mmio + PDC_TBG_MODE); /* flush */
1170 msleep(10);
1171
1172 /* adjust slew rate control register. */
1173 tmp = readl(host_mmio + PDC_SLEW_CTL);
1174 tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */
1175 tmp |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */
1176 writel(tmp, host_mmio + PDC_SLEW_CTL);
1177 }
1178
1179 static int pdc_ata_init_one(struct pci_dev *pdev,
1180 const struct pci_device_id *ent)
1181 {
1182 const struct ata_port_info *pi = &pdc_port_info[ent->driver_data];
1183 const struct ata_port_info *ppi[PDC_MAX_PORTS];
1184 struct ata_host *host;
1185 void __iomem *host_mmio;
1186 int n_ports, i, rc;
1187 int is_sataii_tx4;
1188
1189 ata_print_version_once(&pdev->dev, DRV_VERSION);
1190
1191 /* enable and acquire resources */
1192 rc = pcim_enable_device(pdev);
1193 if (rc)
1194 return rc;
1195
1196 rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME);
1197 if (rc == -EBUSY)
1198 pcim_pin_device(pdev);
1199 if (rc)
1200 return rc;
1201 host_mmio = pcim_iomap_table(pdev)[PDC_MMIO_BAR];
1202
1203 /* determine port configuration and setup host */
1204 n_ports = 2;
1205 if (pi->flags & PDC_FLAG_4_PORTS)
1206 n_ports = 4;
1207 for (i = 0; i < n_ports; i++)
1208 ppi[i] = pi;
1209
1210 if (pi->flags & PDC_FLAG_SATA_PATA) {
1211 u8 tmp = readb(host_mmio + PDC_FLASH_CTL + 1);
1212 if (!(tmp & 0x80))
1213 ppi[n_ports++] = pi + 1;
1214 }
1215
1216 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
1217 if (!host) {
1218 dev_err(&pdev->dev, "failed to allocate host\n");
1219 return -ENOMEM;
1220 }
1221 host->iomap = pcim_iomap_table(pdev);
1222
1223 is_sataii_tx4 = pdc_is_sataii_tx4(pi->flags);
1224 for (i = 0; i < host->n_ports; i++) {
1225 struct ata_port *ap = host->ports[i];
1226 unsigned int ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
1227 unsigned int ata_offset = 0x200 + ata_no * 0x80;
1228 unsigned int scr_offset = 0x400 + ata_no * 0x100;
1229
1230 pdc_ata_setup_port(ap, host_mmio + ata_offset, host_mmio + scr_offset);
1231
1232 ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
1233 ata_port_pbar_desc(ap, PDC_MMIO_BAR, ata_offset, "ata");
1234 }
1235
1236 /* initialize adapter */
1237 pdc_host_init(host);
1238
1239 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
1240 if (rc)
1241 return rc;
1242 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
1243 if (rc)
1244 return rc;
1245
1246 /* start host, request IRQ and attach */
1247 pci_set_master(pdev);
1248 return ata_host_activate(host, pdev->irq, pdc_interrupt, IRQF_SHARED,
1249 &pdc_ata_sht);
1250 }
1251
1252 static int __init pdc_ata_init(void)
1253 {
1254 return pci_register_driver(&pdc_ata_pci_driver);
1255 }
1256
1257 static void __exit pdc_ata_exit(void)
1258 {
1259 pci_unregister_driver(&pdc_ata_pci_driver);
1260 }
1261
1262 MODULE_AUTHOR("Jeff Garzik");
1263 MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
1264 MODULE_LICENSE("GPL");
1265 MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
1266 MODULE_VERSION(DRV_VERSION);
1267
1268 module_init(pdc_ata_init);
1269 module_exit(pdc_ata_exit);
Linus' kernel tree