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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / ata / sata_promise.c
blobc451d7d1c817aafb37fd6d791906d1363d56882b
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * sata_promise.c - Promise SATA
4 *
5 * Maintained by: Tejun Heo <tj@kernel.org>
6 * Mikael Pettersson
7 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * on emails.
9 *
10 * Copyright 2003-2004 Red Hat, Inc.
11 *
12 * libata documentation is available via 'make {ps|pdf}docs',
13 * as Documentation/driver-api/libata.rst
14 *
15 * Hardware information only available under NDA.
16 */
17
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/gfp.h>
21 #include <linux/pci.h>
22 #include <linux/blkdev.h>
23 #include <linux/delay.h>
24 #include <linux/interrupt.h>
25 #include <linux/device.h>
26 #include <scsi/scsi.h>
27 #include <scsi/scsi_host.h>
28 #include <scsi/scsi_cmnd.h>
29 #include <linux/libata.h>
30 #include "sata_promise.h"
31
32 #define DRV_NAME "sata_promise"
33 #define DRV_VERSION "2.12"
34
35 enum {
36 PDC_MAX_PORTS = 4,
37 PDC_MMIO_BAR = 3,
38 PDC_MAX_PRD = LIBATA_MAX_PRD - 1, /* -1 for ASIC PRD bug workaround */
39
40 /* host register offsets (from host->iomap[PDC_MMIO_BAR]) */
41 PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */
42 PDC_FLASH_CTL = 0x44, /* Flash control register */
43 PDC_PCI_CTL = 0x48, /* PCI control/status reg */
44 PDC_SATA_PLUG_CSR = 0x6C, /* SATA Plug control/status reg */
45 PDC2_SATA_PLUG_CSR = 0x60, /* SATAII Plug control/status reg */
46 PDC_TBG_MODE = 0x41C, /* TBG mode (not SATAII) */
47 PDC_SLEW_CTL = 0x470, /* slew rate control reg (not SATAII) */
48
49 /* per-port ATA register offsets (from ap->ioaddr.cmd_addr) */
50 PDC_FEATURE = 0x04, /* Feature/Error reg (per port) */
51 PDC_SECTOR_COUNT = 0x08, /* Sector count reg (per port) */
52 PDC_SECTOR_NUMBER = 0x0C, /* Sector number reg (per port) */
53 PDC_CYLINDER_LOW = 0x10, /* Cylinder low reg (per port) */
54 PDC_CYLINDER_HIGH = 0x14, /* Cylinder high reg (per port) */
55 PDC_DEVICE = 0x18, /* Device/Head reg (per port) */
56 PDC_COMMAND = 0x1C, /* Command/status reg (per port) */
57 PDC_ALTSTATUS = 0x38, /* Alternate-status/device-control reg (per port) */
58 PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */
59 PDC_GLOBAL_CTL = 0x48, /* Global control/status (per port) */
60 PDC_CTLSTAT = 0x60, /* IDE control and status (per port) */
61
62 /* per-port SATA register offsets (from ap->ioaddr.scr_addr) */
63 PDC_SATA_ERROR = 0x04,
64 PDC_PHYMODE4 = 0x14,
65 PDC_LINK_LAYER_ERRORS = 0x6C,
66 PDC_FPDMA_CTLSTAT = 0xD8,
67 PDC_INTERNAL_DEBUG_1 = 0xF8, /* also used for PATA */
68 PDC_INTERNAL_DEBUG_2 = 0xFC, /* also used for PATA */
69
70 /* PDC_FPDMA_CTLSTAT bit definitions */
71 PDC_FPDMA_CTLSTAT_RESET = 1 << 3,
72 PDC_FPDMA_CTLSTAT_DMASETUP_INT_FLAG = 1 << 10,
73 PDC_FPDMA_CTLSTAT_SETDB_INT_FLAG = 1 << 11,
74
75 /* PDC_GLOBAL_CTL bit definitions */
76 PDC_PH_ERR = (1 << 8), /* PCI error while loading packet */
77 PDC_SH_ERR = (1 << 9), /* PCI error while loading S/G table */
78 PDC_DH_ERR = (1 << 10), /* PCI error while loading data */
79 PDC2_HTO_ERR = (1 << 12), /* host bus timeout */
80 PDC2_ATA_HBA_ERR = (1 << 13), /* error during SATA DATA FIS transmission */
81 PDC2_ATA_DMA_CNT_ERR = (1 << 14), /* DMA DATA FIS size differs from S/G count */
82 PDC_OVERRUN_ERR = (1 << 19), /* S/G byte count larger than HD requires */
83 PDC_UNDERRUN_ERR = (1 << 20), /* S/G byte count less than HD requires */
84 PDC_DRIVE_ERR = (1 << 21), /* drive error */
85 PDC_PCI_SYS_ERR = (1 << 22), /* PCI system error */
86 PDC1_PCI_PARITY_ERR = (1 << 23), /* PCI parity error (from SATA150 driver) */
87 PDC1_ERR_MASK = PDC1_PCI_PARITY_ERR,
88 PDC2_ERR_MASK = PDC2_HTO_ERR | PDC2_ATA_HBA_ERR |
89 PDC2_ATA_DMA_CNT_ERR,
90 PDC_ERR_MASK = PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR |
91 PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR |
92 PDC_DRIVE_ERR | PDC_PCI_SYS_ERR |
93 PDC1_ERR_MASK | PDC2_ERR_MASK,
94
95 board_2037x = 0, /* FastTrak S150 TX2plus */
96 board_2037x_pata = 1, /* FastTrak S150 TX2plus PATA port */
97 board_20319 = 2, /* FastTrak S150 TX4 */
98 board_20619 = 3, /* FastTrak TX4000 */
99 board_2057x = 4, /* SATAII150 Tx2plus */
100 board_2057x_pata = 5, /* SATAII150 Tx2plus PATA port */
101 board_40518 = 6, /* SATAII150 Tx4 */
102
103 PDC_HAS_PATA = (1 << 1), /* PDC20375/20575 has PATA */
104
105 /* Sequence counter control registers bit definitions */
106 PDC_SEQCNTRL_INT_MASK = (1 << 5), /* Sequence Interrupt Mask */
107
108 /* Feature register values */
109 PDC_FEATURE_ATAPI_PIO = 0x00, /* ATAPI data xfer by PIO */
110 PDC_FEATURE_ATAPI_DMA = 0x01, /* ATAPI data xfer by DMA */
111
112 /* Device/Head register values */
113 PDC_DEVICE_SATA = 0xE0, /* Device/Head value for SATA devices */
114
115 /* PDC_CTLSTAT bit definitions */
116 PDC_DMA_ENABLE = (1 << 7),
117 PDC_IRQ_DISABLE = (1 << 10),
118 PDC_RESET = (1 << 11), /* HDMA reset */
119
120 PDC_COMMON_FLAGS = ATA_FLAG_PIO_POLLING,
121
122 /* ap->flags bits */
123 PDC_FLAG_GEN_II = (1 << 24),
124 PDC_FLAG_SATA_PATA = (1 << 25), /* supports SATA + PATA */
125 PDC_FLAG_4_PORTS = (1 << 26), /* 4 ports */
126 };
127
128 struct pdc_port_priv {
129 u8 *pkt;
130 dma_addr_t pkt_dma;
131 };
132
133 struct pdc_host_priv {
134 spinlock_t hard_reset_lock;
135 };
136
137 static int pdc_sata_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
138 static int pdc_sata_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
139 static int pdc_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
140 static int pdc_common_port_start(struct ata_port *ap);
141 static int pdc_sata_port_start(struct ata_port *ap);
142 static enum ata_completion_errors pdc_qc_prep(struct ata_queued_cmd *qc);
143 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
144 static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf);
145 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc);
146 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc);
147 static void pdc_irq_clear(struct ata_port *ap);
148 static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc);
149 static void pdc_freeze(struct ata_port *ap);
150 static void pdc_sata_freeze(struct ata_port *ap);
151 static void pdc_thaw(struct ata_port *ap);
152 static void pdc_sata_thaw(struct ata_port *ap);
153 static int pdc_pata_softreset(struct ata_link *link, unsigned int *class,
154 unsigned long deadline);
155 static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class,
156 unsigned long deadline);
157 static void pdc_error_handler(struct ata_port *ap);
158 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc);
159 static int pdc_pata_cable_detect(struct ata_port *ap);
160 static int pdc_sata_cable_detect(struct ata_port *ap);
161
162 static struct scsi_host_template pdc_ata_sht = {
163 ATA_BASE_SHT(DRV_NAME),
164 .sg_tablesize = PDC_MAX_PRD,
165 .dma_boundary = ATA_DMA_BOUNDARY,
166 };
167
168 static const struct ata_port_operations pdc_common_ops = {
169 .inherits = &ata_sff_port_ops,
170
171 .sff_tf_load = pdc_tf_load_mmio,
172 .sff_exec_command = pdc_exec_command_mmio,
173 .check_atapi_dma = pdc_check_atapi_dma,
174 .qc_prep = pdc_qc_prep,
175 .qc_issue = pdc_qc_issue,
176
177 .sff_irq_clear = pdc_irq_clear,
178 .lost_interrupt = ATA_OP_NULL,
179
180 .post_internal_cmd = pdc_post_internal_cmd,
181 .error_handler = pdc_error_handler,
182 };
183
184 static struct ata_port_operations pdc_sata_ops = {
185 .inherits = &pdc_common_ops,
186 .cable_detect = pdc_sata_cable_detect,
187 .freeze = pdc_sata_freeze,
188 .thaw = pdc_sata_thaw,
189 .scr_read = pdc_sata_scr_read,
190 .scr_write = pdc_sata_scr_write,
191 .port_start = pdc_sata_port_start,
192 .hardreset = pdc_sata_hardreset,
193 };
194
195 /* First-generation chips need a more restrictive ->check_atapi_dma op,
196 and ->freeze/thaw that ignore the hotplug controls. */
197 static struct ata_port_operations pdc_old_sata_ops = {
198 .inherits = &pdc_sata_ops,
199 .freeze = pdc_freeze,
200 .thaw = pdc_thaw,
201 .check_atapi_dma = pdc_old_sata_check_atapi_dma,
202 };
203
204 static struct ata_port_operations pdc_pata_ops = {
205 .inherits = &pdc_common_ops,
206 .cable_detect = pdc_pata_cable_detect,
207 .freeze = pdc_freeze,
208 .thaw = pdc_thaw,
209 .port_start = pdc_common_port_start,
210 .softreset = pdc_pata_softreset,
211 };
212
213 static const struct ata_port_info pdc_port_info[] = {
214 [board_2037x] =
215 {
216 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
217 PDC_FLAG_SATA_PATA,
218 .pio_mask = ATA_PIO4,
219 .mwdma_mask = ATA_MWDMA2,
220 .udma_mask = ATA_UDMA6,
221 .port_ops = &pdc_old_sata_ops,
222 },
223
224 [board_2037x_pata] =
225 {
226 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS,
227 .pio_mask = ATA_PIO4,
228 .mwdma_mask = ATA_MWDMA2,
229 .udma_mask = ATA_UDMA6,
230 .port_ops = &pdc_pata_ops,
231 },
232
233 [board_20319] =
234 {
235 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
236 PDC_FLAG_4_PORTS,
237 .pio_mask = ATA_PIO4,
238 .mwdma_mask = ATA_MWDMA2,
239 .udma_mask = ATA_UDMA6,
240 .port_ops = &pdc_old_sata_ops,
241 },
242
243 [board_20619] =
244 {
245 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
246 PDC_FLAG_4_PORTS,
247 .pio_mask = ATA_PIO4,
248 .mwdma_mask = ATA_MWDMA2,
249 .udma_mask = ATA_UDMA6,
250 .port_ops = &pdc_pata_ops,
251 },
252
253 [board_2057x] =
254 {
255 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
256 PDC_FLAG_GEN_II | PDC_FLAG_SATA_PATA,
257 .pio_mask = ATA_PIO4,
258 .mwdma_mask = ATA_MWDMA2,
259 .udma_mask = ATA_UDMA6,
260 .port_ops = &pdc_sata_ops,
261 },
262
263 [board_2057x_pata] =
264 {
265 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SLAVE_POSS |
266 PDC_FLAG_GEN_II,
267 .pio_mask = ATA_PIO4,
268 .mwdma_mask = ATA_MWDMA2,
269 .udma_mask = ATA_UDMA6,
270 .port_ops = &pdc_pata_ops,
271 },
272
273 [board_40518] =
274 {
275 .flags = PDC_COMMON_FLAGS | ATA_FLAG_SATA |
276 PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS,
277 .pio_mask = ATA_PIO4,
278 .mwdma_mask = ATA_MWDMA2,
279 .udma_mask = ATA_UDMA6,
280 .port_ops = &pdc_sata_ops,
281 },
282 };
283
284 static const struct pci_device_id pdc_ata_pci_tbl[] = {
285 { PCI_VDEVICE(PROMISE, 0x3371), board_2037x },
286 { PCI_VDEVICE(PROMISE, 0x3373), board_2037x },
287 { PCI_VDEVICE(PROMISE, 0x3375), board_2037x },
288 { PCI_VDEVICE(PROMISE, 0x3376), board_2037x },
289 { PCI_VDEVICE(PROMISE, 0x3570), board_2057x },
290 { PCI_VDEVICE(PROMISE, 0x3571), board_2057x },
291 { PCI_VDEVICE(PROMISE, 0x3574), board_2057x },
292 { PCI_VDEVICE(PROMISE, 0x3577), board_2057x },
293 { PCI_VDEVICE(PROMISE, 0x3d73), board_2057x },
294 { PCI_VDEVICE(PROMISE, 0x3d75), board_2057x },
295
296 { PCI_VDEVICE(PROMISE, 0x3318), board_20319 },
297 { PCI_VDEVICE(PROMISE, 0x3319), board_20319 },
298 { PCI_VDEVICE(PROMISE, 0x3515), board_40518 },
299 { PCI_VDEVICE(PROMISE, 0x3519), board_40518 },
300 { PCI_VDEVICE(PROMISE, 0x3d17), board_40518 },
301 { PCI_VDEVICE(PROMISE, 0x3d18), board_40518 },
302
303 { PCI_VDEVICE(PROMISE, 0x6629), board_20619 },
304
305 { } /* terminate list */
306 };
307
308 static struct pci_driver pdc_ata_pci_driver = {
309 .name = DRV_NAME,
310 .id_table = pdc_ata_pci_tbl,
311 .probe = pdc_ata_init_one,
312 .remove = ata_pci_remove_one,
313 };
314
315 static int pdc_common_port_start(struct ata_port *ap)
316 {
317 struct device *dev = ap->host->dev;
318 struct pdc_port_priv *pp;
319 int rc;
320
321 /* we use the same prd table as bmdma, allocate it */
322 rc = ata_bmdma_port_start(ap);
323 if (rc)
324 return rc;
325
326 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
327 if (!pp)
328 return -ENOMEM;
329
330 pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL);
331 if (!pp->pkt)
332 return -ENOMEM;
333
334 ap->private_data = pp;
335
336 return 0;
337 }
338
339 static int pdc_sata_port_start(struct ata_port *ap)
340 {
341 int rc;
342
343 rc = pdc_common_port_start(ap);
344 if (rc)
345 return rc;
346
347 /* fix up PHYMODE4 align timing */
348 if (ap->flags & PDC_FLAG_GEN_II) {
349 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
350 unsigned int tmp;
351
352 tmp = readl(sata_mmio + PDC_PHYMODE4);
353 tmp = (tmp & ~3) | 1; /* set bits 1:0 = 0:1 */
354 writel(tmp, sata_mmio + PDC_PHYMODE4);
355 }
356
357 return 0;
358 }
359
360 static void pdc_fpdma_clear_interrupt_flag(struct ata_port *ap)
361 {
362 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
363 u32 tmp;
364
365 tmp = readl(sata_mmio + PDC_FPDMA_CTLSTAT);
366 tmp |= PDC_FPDMA_CTLSTAT_DMASETUP_INT_FLAG;
367 tmp |= PDC_FPDMA_CTLSTAT_SETDB_INT_FLAG;
368
369 /* It's not allowed to write to the entire FPDMA_CTLSTAT register
370 when NCQ is running. So do a byte-sized write to bits 10 and 11. */
371 writeb(tmp >> 8, sata_mmio + PDC_FPDMA_CTLSTAT + 1);
372 readb(sata_mmio + PDC_FPDMA_CTLSTAT + 1); /* flush */
373 }
374
375 static void pdc_fpdma_reset(struct ata_port *ap)
376 {
377 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
378 u8 tmp;
379
380 tmp = (u8)readl(sata_mmio + PDC_FPDMA_CTLSTAT);
381 tmp &= 0x7F;
382 tmp |= PDC_FPDMA_CTLSTAT_RESET;
383 writeb(tmp, sata_mmio + PDC_FPDMA_CTLSTAT);
384 readl(sata_mmio + PDC_FPDMA_CTLSTAT); /* flush */
385 udelay(100);
386 tmp &= ~PDC_FPDMA_CTLSTAT_RESET;
387 writeb(tmp, sata_mmio + PDC_FPDMA_CTLSTAT);
388 readl(sata_mmio + PDC_FPDMA_CTLSTAT); /* flush */
389
390 pdc_fpdma_clear_interrupt_flag(ap);
391 }
392
393 static void pdc_not_at_command_packet_phase(struct ata_port *ap)
394 {
395 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
396 unsigned int i;
397 u32 tmp;
398
399 /* check not at ASIC packet command phase */
400 for (i = 0; i < 100; ++i) {
401 writel(0, sata_mmio + PDC_INTERNAL_DEBUG_1);
402 tmp = readl(sata_mmio + PDC_INTERNAL_DEBUG_2);
403 if ((tmp & 0xF) != 1)
404 break;
405 udelay(100);
406 }
407 }
408
409 static void pdc_clear_internal_debug_record_error_register(struct ata_port *ap)
410 {
411 void __iomem *sata_mmio = ap->ioaddr.scr_addr;
412
413 writel(0xffffffff, sata_mmio + PDC_SATA_ERROR);
414 writel(0xffff0000, sata_mmio + PDC_LINK_LAYER_ERRORS);
415 }
416
417 static void pdc_reset_port(struct ata_port *ap)
418 {
419 void __iomem *ata_ctlstat_mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT;
420 unsigned int i;
421 u32 tmp;
422
423 if (ap->flags & PDC_FLAG_GEN_II)
424 pdc_not_at_command_packet_phase(ap);
425
426 tmp = readl(ata_ctlstat_mmio);
427 tmp |= PDC_RESET;
428 writel(tmp, ata_ctlstat_mmio);
429
430 for (i = 11; i > 0; i--) {
431 tmp = readl(ata_ctlstat_mmio);
432 if (tmp & PDC_RESET)
433 break;
434
435 udelay(100);
436
437 tmp |= PDC_RESET;
438 writel(tmp, ata_ctlstat_mmio);
439 }
440
441 tmp &= ~PDC_RESET;
442 writel(tmp, ata_ctlstat_mmio);
443 readl(ata_ctlstat_mmio); /* flush */
444
445 if (sata_scr_valid(&ap->link) && (ap->flags & PDC_FLAG_GEN_II)) {
446 pdc_fpdma_reset(ap);
447 pdc_clear_internal_debug_record_error_register(ap);
448 }
449 }
450
451 static int pdc_pata_cable_detect(struct ata_port *ap)
452 {
453 u8 tmp;
454 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
455
456 tmp = readb(ata_mmio + PDC_CTLSTAT + 3);
457 if (tmp & 0x01)
458 return ATA_CBL_PATA40;
459 return ATA_CBL_PATA80;
460 }
461
462 static int pdc_sata_cable_detect(struct ata_port *ap)
463 {
464 return ATA_CBL_SATA;
465 }
466
467 static int pdc_sata_scr_read(struct ata_link *link,
468 unsigned int sc_reg, u32 *val)
469 {
470 if (sc_reg > SCR_CONTROL)
471 return -EINVAL;
472 *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 4));
473 return 0;
474 }
475
476 static int pdc_sata_scr_write(struct ata_link *link,
477 unsigned int sc_reg, u32 val)
478 {
479 if (sc_reg > SCR_CONTROL)
480 return -EINVAL;
481 writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 4));
482 return 0;
483 }
484
485 static void pdc_atapi_pkt(struct ata_queued_cmd *qc)
486 {
487 struct ata_port *ap = qc->ap;
488 dma_addr_t sg_table = ap->bmdma_prd_dma;
489 unsigned int cdb_len = qc->dev->cdb_len;
490 u8 *cdb = qc->cdb;
491 struct pdc_port_priv *pp = ap->private_data;
492 u8 *buf = pp->pkt;
493 __le32 *buf32 = (__le32 *) buf;
494 unsigned int dev_sel, feature;
495
496 /* set control bits (byte 0), zero delay seq id (byte 3),
497 * and seq id (byte 2)
498 */
499 switch (qc->tf.protocol) {
500 case ATAPI_PROT_DMA:
501 if (!(qc->tf.flags & ATA_TFLAG_WRITE))
502 buf32[0] = cpu_to_le32(PDC_PKT_READ);
503 else
504 buf32[0] = 0;
505 break;
506 case ATAPI_PROT_NODATA:
507 buf32[0] = cpu_to_le32(PDC_PKT_NODATA);
508 break;
509 default:
510 BUG();
511 break;
512 }
513 buf32[1] = cpu_to_le32(sg_table); /* S/G table addr */
514 buf32[2] = 0; /* no next-packet */
515
516 /* select drive */
517 if (sata_scr_valid(&ap->link))
518 dev_sel = PDC_DEVICE_SATA;
519 else
520 dev_sel = qc->tf.device;
521
522 buf[12] = (1 << 5) | ATA_REG_DEVICE;
523 buf[13] = dev_sel;
524 buf[14] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_CLEAR_BSY;
525 buf[15] = dev_sel; /* once more, waiting for BSY to clear */
526
527 buf[16] = (1 << 5) | ATA_REG_NSECT;
528 buf[17] = qc->tf.nsect;
529 buf[18] = (1 << 5) | ATA_REG_LBAL;
530 buf[19] = qc->tf.lbal;
531
532 /* set feature and byte counter registers */
533 if (qc->tf.protocol != ATAPI_PROT_DMA)
534 feature = PDC_FEATURE_ATAPI_PIO;
535 else
536 feature = PDC_FEATURE_ATAPI_DMA;
537
538 buf[20] = (1 << 5) | ATA_REG_FEATURE;
539 buf[21] = feature;
540 buf[22] = (1 << 5) | ATA_REG_BYTEL;
541 buf[23] = qc->tf.lbam;
542 buf[24] = (1 << 5) | ATA_REG_BYTEH;
543 buf[25] = qc->tf.lbah;
544
545 /* send ATAPI packet command 0xA0 */
546 buf[26] = (1 << 5) | ATA_REG_CMD;
547 buf[27] = qc->tf.command;
548
549 /* select drive and check DRQ */
550 buf[28] = (1 << 5) | ATA_REG_DEVICE | PDC_PKT_WAIT_DRDY;
551 buf[29] = dev_sel;
552
553 /* we can represent cdb lengths 2/4/6/8/10/12/14/16 */
554 BUG_ON(cdb_len & ~0x1E);
555
556 /* append the CDB as the final part */
557 buf[30] = (((cdb_len >> 1) & 7) << 5) | ATA_REG_DATA | PDC_LAST_REG;
558 memcpy(buf+31, cdb, cdb_len);
559 }
560
561 /**
562 * pdc_fill_sg - Fill PCI IDE PRD table
563 * @qc: Metadata associated with taskfile to be transferred
564 *
565 * Fill PCI IDE PRD (scatter-gather) table with segments
566 * associated with the current disk command.
567 * Make sure hardware does not choke on it.
568 *
569 * LOCKING:
570 * spin_lock_irqsave(host lock)
571 *
572 */
573 static void pdc_fill_sg(struct ata_queued_cmd *qc)
574 {
575 struct ata_port *ap = qc->ap;
576 struct ata_bmdma_prd *prd = ap->bmdma_prd;
577 struct scatterlist *sg;
578 const u32 SG_COUNT_ASIC_BUG = 41*4;
579 unsigned int si, idx;
580 u32 len;
581
582 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
583 return;
584
585 idx = 0;
586 for_each_sg(qc->sg, sg, qc->n_elem, si) {
587 u32 addr, offset;
588 u32 sg_len;
589
590 /* determine if physical DMA addr spans 64K boundary.
591 * Note h/w doesn't support 64-bit, so we unconditionally
592 * truncate dma_addr_t to u32.
593 */
594 addr = (u32) sg_dma_address(sg);
595 sg_len = sg_dma_len(sg);
596
597 while (sg_len) {
598 offset = addr & 0xffff;
599 len = sg_len;
600 if ((offset + sg_len) > 0x10000)
601 len = 0x10000 - offset;
602
603 prd[idx].addr = cpu_to_le32(addr);
604 prd[idx].flags_len = cpu_to_le32(len & 0xffff);
605 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
606
607 idx++;
608 sg_len -= len;
609 addr += len;
610 }
611 }
612
613 len = le32_to_cpu(prd[idx - 1].flags_len);
614
615 if (len > SG_COUNT_ASIC_BUG) {
616 u32 addr;
617
618 VPRINTK("Splitting last PRD.\n");
619
620 addr = le32_to_cpu(prd[idx - 1].addr);
621 prd[idx - 1].flags_len = cpu_to_le32(len - SG_COUNT_ASIC_BUG);
622 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx - 1, addr, SG_COUNT_ASIC_BUG);
623
624 addr = addr + len - SG_COUNT_ASIC_BUG;
625 len = SG_COUNT_ASIC_BUG;
626 prd[idx].addr = cpu_to_le32(addr);
627 prd[idx].flags_len = cpu_to_le32(len);
628 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", idx, addr, len);
629
630 idx++;
631 }
632
633 prd[idx - 1].flags_len |= cpu_to_le32(ATA_PRD_EOT);
634 }
635
636 static enum ata_completion_errors pdc_qc_prep(struct ata_queued_cmd *qc)
637 {
638 struct pdc_port_priv *pp = qc->ap->private_data;
639 unsigned int i;
640
641 VPRINTK("ENTER\n");
642
643 switch (qc->tf.protocol) {
644 case ATA_PROT_DMA:
645 pdc_fill_sg(qc);
646 /*FALLTHROUGH*/
647 case ATA_PROT_NODATA:
648 i = pdc_pkt_header(&qc->tf, qc->ap->bmdma_prd_dma,
649 qc->dev->devno, pp->pkt);
650 if (qc->tf.flags & ATA_TFLAG_LBA48)
651 i = pdc_prep_lba48(&qc->tf, pp->pkt, i);
652 else
653 i = pdc_prep_lba28(&qc->tf, pp->pkt, i);
654 pdc_pkt_footer(&qc->tf, pp->pkt, i);
655 break;
656 case ATAPI_PROT_PIO:
657 pdc_fill_sg(qc);
658 break;
659 case ATAPI_PROT_DMA:
660 pdc_fill_sg(qc);
661 /*FALLTHROUGH*/
662 case ATAPI_PROT_NODATA:
663 pdc_atapi_pkt(qc);
664 break;
665 default:
666 break;
667 }
668
669 return AC_ERR_OK;
670 }
671
672 static int pdc_is_sataii_tx4(unsigned long flags)
673 {
674 const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS;
675 return (flags & mask) == mask;
676 }
677
678 static unsigned int pdc_port_no_to_ata_no(unsigned int port_no,
679 int is_sataii_tx4)
680 {
681 static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2};
682 return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no;
683 }
684
685 static unsigned int pdc_sata_nr_ports(const struct ata_port *ap)
686 {
687 return (ap->flags & PDC_FLAG_4_PORTS) ? 4 : 2;
688 }
689
690 static unsigned int pdc_sata_ata_port_to_ata_no(const struct ata_port *ap)
691 {
692 const struct ata_host *host = ap->host;
693 unsigned int nr_ports = pdc_sata_nr_ports(ap);
694 unsigned int i;
695
696 for (i = 0; i < nr_ports && host->ports[i] != ap; ++i)
697 ;
698 BUG_ON(i >= nr_ports);
699 return pdc_port_no_to_ata_no(i, pdc_is_sataii_tx4(ap->flags));
700 }
701
702 static void pdc_freeze(struct ata_port *ap)
703 {
704 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
705 u32 tmp;
706
707 tmp = readl(ata_mmio + PDC_CTLSTAT);
708 tmp |= PDC_IRQ_DISABLE;
709 tmp &= ~PDC_DMA_ENABLE;
710 writel(tmp, ata_mmio + PDC_CTLSTAT);
711 readl(ata_mmio + PDC_CTLSTAT); /* flush */
712 }
713
714 static void pdc_sata_freeze(struct ata_port *ap)
715 {
716 struct ata_host *host = ap->host;
717 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
718 unsigned int hotplug_offset = PDC2_SATA_PLUG_CSR;
719 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
720 u32 hotplug_status;
721
722 /* Disable hotplug events on this port.
723 *
724 * Locking:
725 * 1) hotplug register accesses must be serialised via host->lock
726 * 2) ap->lock == &ap->host->lock
727 * 3) ->freeze() and ->thaw() are called with ap->lock held
728 */
729 hotplug_status = readl(host_mmio + hotplug_offset);
730 hotplug_status |= 0x11 << (ata_no + 16);
731 writel(hotplug_status, host_mmio + hotplug_offset);
732 readl(host_mmio + hotplug_offset); /* flush */
733
734 pdc_freeze(ap);
735 }
736
737 static void pdc_thaw(struct ata_port *ap)
738 {
739 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
740 u32 tmp;
741
742 /* clear IRQ */
743 readl(ata_mmio + PDC_COMMAND);
744
745 /* turn IRQ back on */
746 tmp = readl(ata_mmio + PDC_CTLSTAT);
747 tmp &= ~PDC_IRQ_DISABLE;
748 writel(tmp, ata_mmio + PDC_CTLSTAT);
749 readl(ata_mmio + PDC_CTLSTAT); /* flush */
750 }
751
752 static void pdc_sata_thaw(struct ata_port *ap)
753 {
754 struct ata_host *host = ap->host;
755 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
756 unsigned int hotplug_offset = PDC2_SATA_PLUG_CSR;
757 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
758 u32 hotplug_status;
759
760 pdc_thaw(ap);
761
762 /* Enable hotplug events on this port.
763 * Locking: see pdc_sata_freeze().
764 */
765 hotplug_status = readl(host_mmio + hotplug_offset);
766 hotplug_status |= 0x11 << ata_no;
767 hotplug_status &= ~(0x11 << (ata_no + 16));
768 writel(hotplug_status, host_mmio + hotplug_offset);
769 readl(host_mmio + hotplug_offset); /* flush */
770 }
771
772 static int pdc_pata_softreset(struct ata_link *link, unsigned int *class,
773 unsigned long deadline)
774 {
775 pdc_reset_port(link->ap);
776 return ata_sff_softreset(link, class, deadline);
777 }
778
779 static unsigned int pdc_ata_port_to_ata_no(const struct ata_port *ap)
780 {
781 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
782 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
783
784 /* ata_mmio == host_mmio + 0x200 + ata_no * 0x80 */
785 return (ata_mmio - host_mmio - 0x200) / 0x80;
786 }
787
788 static void pdc_hard_reset_port(struct ata_port *ap)
789 {
790 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
791 void __iomem *pcictl_b1_mmio = host_mmio + PDC_PCI_CTL + 1;
792 unsigned int ata_no = pdc_ata_port_to_ata_no(ap);
793 struct pdc_host_priv *hpriv = ap->host->private_data;
794 u8 tmp;
795
796 spin_lock(&hpriv->hard_reset_lock);
797
798 tmp = readb(pcictl_b1_mmio);
799 tmp &= ~(0x10 << ata_no);
800 writeb(tmp, pcictl_b1_mmio);
801 readb(pcictl_b1_mmio); /* flush */
802 udelay(100);
803 tmp |= (0x10 << ata_no);
804 writeb(tmp, pcictl_b1_mmio);
805 readb(pcictl_b1_mmio); /* flush */
806
807 spin_unlock(&hpriv->hard_reset_lock);
808 }
809
810 static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class,
811 unsigned long deadline)
812 {
813 if (link->ap->flags & PDC_FLAG_GEN_II)
814 pdc_not_at_command_packet_phase(link->ap);
815 /* hotplug IRQs should have been masked by pdc_sata_freeze() */
816 pdc_hard_reset_port(link->ap);
817 pdc_reset_port(link->ap);
818
819 /* sata_promise can't reliably acquire the first D2H Reg FIS
820 * after hardreset. Do non-waiting hardreset and request
821 * follow-up SRST.
822 */
823 return sata_std_hardreset(link, class, deadline);
824 }
825
826 static void pdc_error_handler(struct ata_port *ap)
827 {
828 if (!(ap->pflags & ATA_PFLAG_FROZEN))
829 pdc_reset_port(ap);
830
831 ata_sff_error_handler(ap);
832 }
833
834 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc)
835 {
836 struct ata_port *ap = qc->ap;
837
838 /* make DMA engine forget about the failed command */
839 if (qc->flags & ATA_QCFLAG_FAILED)
840 pdc_reset_port(ap);
841 }
842
843 static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
844 u32 port_status, u32 err_mask)
845 {
846 struct ata_eh_info *ehi = &ap->link.eh_info;
847 unsigned int ac_err_mask = 0;
848
849 ata_ehi_clear_desc(ehi);
850 ata_ehi_push_desc(ehi, "port_status 0x%08x", port_status);
851 port_status &= err_mask;
852
853 if (port_status & PDC_DRIVE_ERR)
854 ac_err_mask |= AC_ERR_DEV;
855 if (port_status & (PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR))
856 ac_err_mask |= AC_ERR_OTHER;
857 if (port_status & (PDC2_ATA_HBA_ERR | PDC2_ATA_DMA_CNT_ERR))
858 ac_err_mask |= AC_ERR_ATA_BUS;
859 if (port_status & (PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR | PDC2_HTO_ERR
860 | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
861 ac_err_mask |= AC_ERR_HOST_BUS;
862
863 if (sata_scr_valid(&ap->link)) {
864 u32 serror;
865
866 pdc_sata_scr_read(&ap->link, SCR_ERROR, &serror);
867 ehi->serror |= serror;
868 }
869
870 qc->err_mask |= ac_err_mask;
871
872 pdc_reset_port(ap);
873
874 ata_port_abort(ap);
875 }
876
877 static unsigned int pdc_host_intr(struct ata_port *ap,
878 struct ata_queued_cmd *qc)
879 {
880 unsigned int handled = 0;
881 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
882 u32 port_status, err_mask;
883
884 err_mask = PDC_ERR_MASK;
885 if (ap->flags & PDC_FLAG_GEN_II)
886 err_mask &= ~PDC1_ERR_MASK;
887 else
888 err_mask &= ~PDC2_ERR_MASK;
889 port_status = readl(ata_mmio + PDC_GLOBAL_CTL);
890 if (unlikely(port_status & err_mask)) {
891 pdc_error_intr(ap, qc, port_status, err_mask);
892 return 1;
893 }
894
895 switch (qc->tf.protocol) {
896 case ATA_PROT_DMA:
897 case ATA_PROT_NODATA:
898 case ATAPI_PROT_DMA:
899 case ATAPI_PROT_NODATA:
900 qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
901 ata_qc_complete(qc);
902 handled = 1;
903 break;
904 default:
905 ap->stats.idle_irq++;
906 break;
907 }
908
909 return handled;
910 }
911
912 static void pdc_irq_clear(struct ata_port *ap)
913 {
914 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
915
916 readl(ata_mmio + PDC_COMMAND);
917 }
918
919 static irqreturn_t pdc_interrupt(int irq, void *dev_instance)
920 {
921 struct ata_host *host = dev_instance;
922 struct ata_port *ap;
923 u32 mask = 0;
924 unsigned int i, tmp;
925 unsigned int handled = 0;
926 void __iomem *host_mmio;
927 unsigned int hotplug_offset, ata_no;
928 u32 hotplug_status;
929 int is_sataii_tx4;
930
931 VPRINTK("ENTER\n");
932
933 if (!host || !host->iomap[PDC_MMIO_BAR]) {
934 VPRINTK("QUICK EXIT\n");
935 return IRQ_NONE;
936 }
937
938 host_mmio = host->iomap[PDC_MMIO_BAR];
939
940 spin_lock(&host->lock);
941
942 /* read and clear hotplug flags for all ports */
943 if (host->ports[0]->flags & PDC_FLAG_GEN_II) {
944 hotplug_offset = PDC2_SATA_PLUG_CSR;
945 hotplug_status = readl(host_mmio + hotplug_offset);
946 if (hotplug_status & 0xff)
947 writel(hotplug_status | 0xff, host_mmio + hotplug_offset);
948 hotplug_status &= 0xff; /* clear uninteresting bits */
949 } else
950 hotplug_status = 0;
951
952 /* reading should also clear interrupts */
953 mask = readl(host_mmio + PDC_INT_SEQMASK);
954
955 if (mask == 0xffffffff && hotplug_status == 0) {
956 VPRINTK("QUICK EXIT 2\n");
957 goto done_irq;
958 }
959
960 mask &= 0xffff; /* only 16 SEQIDs possible */
961 if (mask == 0 && hotplug_status == 0) {
962 VPRINTK("QUICK EXIT 3\n");
963 goto done_irq;
964 }
965
966 writel(mask, host_mmio + PDC_INT_SEQMASK);
967
968 is_sataii_tx4 = pdc_is_sataii_tx4(host->ports[0]->flags);
969
970 for (i = 0; i < host->n_ports; i++) {
971 VPRINTK("port %u\n", i);
972 ap = host->ports[i];
973
974 /* check for a plug or unplug event */
975 ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
976 tmp = hotplug_status & (0x11 << ata_no);
977 if (tmp) {
978 struct ata_eh_info *ehi = &ap->link.eh_info;
979 ata_ehi_clear_desc(ehi);
980 ata_ehi_hotplugged(ehi);
981 ata_ehi_push_desc(ehi, "hotplug_status %#x", tmp);
982 ata_port_freeze(ap);
983 ++handled;
984 continue;
985 }
986
987 /* check for a packet interrupt */
988 tmp = mask & (1 << (i + 1));
989 if (tmp) {
990 struct ata_queued_cmd *qc;
991
992 qc = ata_qc_from_tag(ap, ap->link.active_tag);
993 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
994 handled += pdc_host_intr(ap, qc);
995 }
996 }
997
998 VPRINTK("EXIT\n");
999
1000 done_irq:
1001 spin_unlock(&host->lock);
1002 return IRQ_RETVAL(handled);
1003 }
1004
1005 static void pdc_packet_start(struct ata_queued_cmd *qc)
1006 {
1007 struct ata_port *ap = qc->ap;
1008 struct pdc_port_priv *pp = ap->private_data;
1009 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
1010 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
1011 unsigned int port_no = ap->port_no;
1012 u8 seq = (u8) (port_no + 1);
1013
1014 VPRINTK("ENTER, ap %p\n", ap);
1015
1016 writel(0x00000001, host_mmio + (seq * 4));
1017 readl(host_mmio + (seq * 4)); /* flush */
1018
1019 pp->pkt[2] = seq;
1020 wmb(); /* flush PRD, pkt writes */
1021 writel(pp->pkt_dma, ata_mmio + PDC_PKT_SUBMIT);
1022 readl(ata_mmio + PDC_PKT_SUBMIT); /* flush */
1023 }
1024
1025 static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc)
1026 {
1027 switch (qc->tf.protocol) {
1028 case ATAPI_PROT_NODATA:
1029 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
1030 break;
1031 /*FALLTHROUGH*/
1032 case ATA_PROT_NODATA:
1033 if (qc->tf.flags & ATA_TFLAG_POLLING)
1034 break;
1035 /*FALLTHROUGH*/
1036 case ATAPI_PROT_DMA:
1037 case ATA_PROT_DMA:
1038 pdc_packet_start(qc);
1039 return 0;
1040 default:
1041 break;
1042 }
1043 return ata_sff_qc_issue(qc);
1044 }
1045
1046 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
1047 {
1048 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
1049 ata_sff_tf_load(ap, tf);
1050 }
1051
1052 static void pdc_exec_command_mmio(struct ata_port *ap,
1053 const struct ata_taskfile *tf)
1054 {
1055 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
1056 ata_sff_exec_command(ap, tf);
1057 }
1058
1059 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
1060 {
1061 u8 *scsicmd = qc->scsicmd->cmnd;
1062 int pio = 1; /* atapi dma off by default */
1063
1064 /* Whitelist commands that may use DMA. */
1065 switch (scsicmd[0]) {
1066 case WRITE_12:
1067 case WRITE_10:
1068 case WRITE_6:
1069 case READ_12:
1070 case READ_10:
1071 case READ_6:
1072 case 0xad: /* READ_DVD_STRUCTURE */
1073 case 0xbe: /* READ_CD */
1074 pio = 0;
1075 }
1076 /* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */
1077 if (scsicmd[0] == WRITE_10) {
1078 unsigned int lba =
1079 (scsicmd[2] << 24) |
1080 (scsicmd[3] << 16) |
1081 (scsicmd[4] << 8) |
1082 scsicmd[5];
1083 if (lba >= 0xFFFF4FA2)
1084 pio = 1;
1085 }
1086 return pio;
1087 }
1088
1089 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc)
1090 {
1091 /* First generation chips cannot use ATAPI DMA on SATA ports */
1092 return 1;
1093 }
1094
1095 static void pdc_ata_setup_port(struct ata_port *ap,
1096 void __iomem *base, void __iomem *scr_addr)
1097 {
1098 ap->ioaddr.cmd_addr = base;
1099 ap->ioaddr.data_addr = base;
1100 ap->ioaddr.feature_addr =
1101 ap->ioaddr.error_addr = base + 0x4;
1102 ap->ioaddr.nsect_addr = base + 0x8;
1103 ap->ioaddr.lbal_addr = base + 0xc;
1104 ap->ioaddr.lbam_addr = base + 0x10;
1105 ap->ioaddr.lbah_addr = base + 0x14;
1106 ap->ioaddr.device_addr = base + 0x18;
1107 ap->ioaddr.command_addr =
1108 ap->ioaddr.status_addr = base + 0x1c;
1109 ap->ioaddr.altstatus_addr =
1110 ap->ioaddr.ctl_addr = base + 0x38;
1111 ap->ioaddr.scr_addr = scr_addr;
1112 }
1113
1114 static void pdc_host_init(struct ata_host *host)
1115 {
1116 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
1117 int is_gen2 = host->ports[0]->flags & PDC_FLAG_GEN_II;
1118 int hotplug_offset;
1119 u32 tmp;
1120
1121 if (is_gen2)
1122 hotplug_offset = PDC2_SATA_PLUG_CSR;
1123 else
1124 hotplug_offset = PDC_SATA_PLUG_CSR;
1125
1126 /*
1127 * Except for the hotplug stuff, this is voodoo from the
1128 * Promise driver. Label this entire section
1129 * "TODO: figure out why we do this"
1130 */
1131
1132 /* enable BMR_BURST, maybe change FIFO_SHD to 8 dwords */
1133 tmp = readl(host_mmio + PDC_FLASH_CTL);
1134 tmp |= 0x02000; /* bit 13 (enable bmr burst) */
1135 if (!is_gen2)
1136 tmp |= 0x10000; /* bit 16 (fifo threshold at 8 dw) */
1137 writel(tmp, host_mmio + PDC_FLASH_CTL);
1138
1139 /* clear plug/unplug flags for all ports */
1140 tmp = readl(host_mmio + hotplug_offset);
1141 writel(tmp | 0xff, host_mmio + hotplug_offset);
1142
1143 tmp = readl(host_mmio + hotplug_offset);
1144 if (is_gen2) /* unmask plug/unplug ints */
1145 writel(tmp & ~0xff0000, host_mmio + hotplug_offset);
1146 else /* mask plug/unplug ints */
1147 writel(tmp | 0xff0000, host_mmio + hotplug_offset);
1148
1149 /* don't initialise TBG or SLEW on 2nd generation chips */
1150 if (is_gen2)
1151 return;
1152
1153 /* reduce TBG clock to 133 Mhz. */
1154 tmp = readl(host_mmio + PDC_TBG_MODE);
1155 tmp &= ~0x30000; /* clear bit 17, 16*/
1156 tmp |= 0x10000; /* set bit 17:16 = 0:1 */
1157 writel(tmp, host_mmio + PDC_TBG_MODE);
1158
1159 readl(host_mmio + PDC_TBG_MODE); /* flush */
1160 msleep(10);
1161
1162 /* adjust slew rate control register. */
1163 tmp = readl(host_mmio + PDC_SLEW_CTL);
1164 tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */
1165 tmp |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */
1166 writel(tmp, host_mmio + PDC_SLEW_CTL);
1167 }
1168
1169 static int pdc_ata_init_one(struct pci_dev *pdev,
1170 const struct pci_device_id *ent)
1171 {
1172 const struct ata_port_info *pi = &pdc_port_info[ent->driver_data];
1173 const struct ata_port_info *ppi[PDC_MAX_PORTS];
1174 struct ata_host *host;
1175 struct pdc_host_priv *hpriv;
1176 void __iomem *host_mmio;
1177 int n_ports, i, rc;
1178 int is_sataii_tx4;
1179
1180 ata_print_version_once(&pdev->dev, DRV_VERSION);
1181
1182 /* enable and acquire resources */
1183 rc = pcim_enable_device(pdev);
1184 if (rc)
1185 return rc;
1186
1187 rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME);
1188 if (rc == -EBUSY)
1189 pcim_pin_device(pdev);
1190 if (rc)
1191 return rc;
1192 host_mmio = pcim_iomap_table(pdev)[PDC_MMIO_BAR];
1193
1194 /* determine port configuration and setup host */
1195 n_ports = 2;
1196 if (pi->flags & PDC_FLAG_4_PORTS)
1197 n_ports = 4;
1198 for (i = 0; i < n_ports; i++)
1199 ppi[i] = pi;
1200
1201 if (pi->flags & PDC_FLAG_SATA_PATA) {
1202 u8 tmp = readb(host_mmio + PDC_FLASH_CTL + 1);
1203 if (!(tmp & 0x80))
1204 ppi[n_ports++] = pi + 1;
1205 }
1206
1207 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
1208 if (!host) {
1209 dev_err(&pdev->dev, "failed to allocate host\n");
1210 return -ENOMEM;
1211 }
1212 hpriv = devm_kzalloc(&pdev->dev, sizeof *hpriv, GFP_KERNEL);
1213 if (!hpriv)
1214 return -ENOMEM;
1215 spin_lock_init(&hpriv->hard_reset_lock);
1216 host->private_data = hpriv;
1217 host->iomap = pcim_iomap_table(pdev);
1218
1219 is_sataii_tx4 = pdc_is_sataii_tx4(pi->flags);
1220 for (i = 0; i < host->n_ports; i++) {
1221 struct ata_port *ap = host->ports[i];
1222 unsigned int ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
1223 unsigned int ata_offset = 0x200 + ata_no * 0x80;
1224 unsigned int scr_offset = 0x400 + ata_no * 0x100;
1225
1226 pdc_ata_setup_port(ap, host_mmio + ata_offset, host_mmio + scr_offset);
1227
1228 ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
1229 ata_port_pbar_desc(ap, PDC_MMIO_BAR, ata_offset, "ata");
1230 }
1231
1232 /* initialize adapter */
1233 pdc_host_init(host);
1234
1235 rc = dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK);
1236 if (rc)
1237 return rc;
1238
1239 /* start host, request IRQ and attach */
1240 pci_set_master(pdev);
1241 return ata_host_activate(host, pdev->irq, pdc_interrupt, IRQF_SHARED,
1242 &pdc_ata_sht);
1243 }
1244
1245 module_pci_driver(pdc_ata_pci_driver);
1246
1247 MODULE_AUTHOR("Jeff Garzik");
1248 MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
1249 MODULE_LICENSE("GPL");
1250 MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
1251 MODULE_VERSION(DRV_VERSION);
Linux with added FPC-III support