?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Linux 5.2
[linux-2.6/linux-2.6-arm.git] / drivers / ata / sata_promise.c
blobf4dfec3b6e424146a90c00b5d9a53146dca6bdf2
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 void 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 void 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
670 static int pdc_is_sataii_tx4(unsigned long flags)
671 {
672 const unsigned long mask = PDC_FLAG_GEN_II | PDC_FLAG_4_PORTS;
673 return (flags & mask) == mask;
674 }
675
676 static unsigned int pdc_port_no_to_ata_no(unsigned int port_no,
677 int is_sataii_tx4)
678 {
679 static const unsigned char sataii_tx4_port_remap[4] = { 3, 1, 0, 2};
680 return is_sataii_tx4 ? sataii_tx4_port_remap[port_no] : port_no;
681 }
682
683 static unsigned int pdc_sata_nr_ports(const struct ata_port *ap)
684 {
685 return (ap->flags & PDC_FLAG_4_PORTS) ? 4 : 2;
686 }
687
688 static unsigned int pdc_sata_ata_port_to_ata_no(const struct ata_port *ap)
689 {
690 const struct ata_host *host = ap->host;
691 unsigned int nr_ports = pdc_sata_nr_ports(ap);
692 unsigned int i;
693
694 for (i = 0; i < nr_ports && host->ports[i] != ap; ++i)
695 ;
696 BUG_ON(i >= nr_ports);
697 return pdc_port_no_to_ata_no(i, pdc_is_sataii_tx4(ap->flags));
698 }
699
700 static void pdc_freeze(struct ata_port *ap)
701 {
702 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
703 u32 tmp;
704
705 tmp = readl(ata_mmio + PDC_CTLSTAT);
706 tmp |= PDC_IRQ_DISABLE;
707 tmp &= ~PDC_DMA_ENABLE;
708 writel(tmp, ata_mmio + PDC_CTLSTAT);
709 readl(ata_mmio + PDC_CTLSTAT); /* flush */
710 }
711
712 static void pdc_sata_freeze(struct ata_port *ap)
713 {
714 struct ata_host *host = ap->host;
715 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
716 unsigned int hotplug_offset = PDC2_SATA_PLUG_CSR;
717 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
718 u32 hotplug_status;
719
720 /* Disable hotplug events on this port.
721 *
722 * Locking:
723 * 1) hotplug register accesses must be serialised via host->lock
724 * 2) ap->lock == &ap->host->lock
725 * 3) ->freeze() and ->thaw() are called with ap->lock held
726 */
727 hotplug_status = readl(host_mmio + hotplug_offset);
728 hotplug_status |= 0x11 << (ata_no + 16);
729 writel(hotplug_status, host_mmio + hotplug_offset);
730 readl(host_mmio + hotplug_offset); /* flush */
731
732 pdc_freeze(ap);
733 }
734
735 static void pdc_thaw(struct ata_port *ap)
736 {
737 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
738 u32 tmp;
739
740 /* clear IRQ */
741 readl(ata_mmio + PDC_COMMAND);
742
743 /* turn IRQ back on */
744 tmp = readl(ata_mmio + PDC_CTLSTAT);
745 tmp &= ~PDC_IRQ_DISABLE;
746 writel(tmp, ata_mmio + PDC_CTLSTAT);
747 readl(ata_mmio + PDC_CTLSTAT); /* flush */
748 }
749
750 static void pdc_sata_thaw(struct ata_port *ap)
751 {
752 struct ata_host *host = ap->host;
753 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
754 unsigned int hotplug_offset = PDC2_SATA_PLUG_CSR;
755 unsigned int ata_no = pdc_sata_ata_port_to_ata_no(ap);
756 u32 hotplug_status;
757
758 pdc_thaw(ap);
759
760 /* Enable hotplug events on this port.
761 * Locking: see pdc_sata_freeze().
762 */
763 hotplug_status = readl(host_mmio + hotplug_offset);
764 hotplug_status |= 0x11 << ata_no;
765 hotplug_status &= ~(0x11 << (ata_no + 16));
766 writel(hotplug_status, host_mmio + hotplug_offset);
767 readl(host_mmio + hotplug_offset); /* flush */
768 }
769
770 static int pdc_pata_softreset(struct ata_link *link, unsigned int *class,
771 unsigned long deadline)
772 {
773 pdc_reset_port(link->ap);
774 return ata_sff_softreset(link, class, deadline);
775 }
776
777 static unsigned int pdc_ata_port_to_ata_no(const struct ata_port *ap)
778 {
779 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
780 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
781
782 /* ata_mmio == host_mmio + 0x200 + ata_no * 0x80 */
783 return (ata_mmio - host_mmio - 0x200) / 0x80;
784 }
785
786 static void pdc_hard_reset_port(struct ata_port *ap)
787 {
788 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
789 void __iomem *pcictl_b1_mmio = host_mmio + PDC_PCI_CTL + 1;
790 unsigned int ata_no = pdc_ata_port_to_ata_no(ap);
791 struct pdc_host_priv *hpriv = ap->host->private_data;
792 u8 tmp;
793
794 spin_lock(&hpriv->hard_reset_lock);
795
796 tmp = readb(pcictl_b1_mmio);
797 tmp &= ~(0x10 << ata_no);
798 writeb(tmp, pcictl_b1_mmio);
799 readb(pcictl_b1_mmio); /* flush */
800 udelay(100);
801 tmp |= (0x10 << ata_no);
802 writeb(tmp, pcictl_b1_mmio);
803 readb(pcictl_b1_mmio); /* flush */
804
805 spin_unlock(&hpriv->hard_reset_lock);
806 }
807
808 static int pdc_sata_hardreset(struct ata_link *link, unsigned int *class,
809 unsigned long deadline)
810 {
811 if (link->ap->flags & PDC_FLAG_GEN_II)
812 pdc_not_at_command_packet_phase(link->ap);
813 /* hotplug IRQs should have been masked by pdc_sata_freeze() */
814 pdc_hard_reset_port(link->ap);
815 pdc_reset_port(link->ap);
816
817 /* sata_promise can't reliably acquire the first D2H Reg FIS
818 * after hardreset. Do non-waiting hardreset and request
819 * follow-up SRST.
820 */
821 return sata_std_hardreset(link, class, deadline);
822 }
823
824 static void pdc_error_handler(struct ata_port *ap)
825 {
826 if (!(ap->pflags & ATA_PFLAG_FROZEN))
827 pdc_reset_port(ap);
828
829 ata_sff_error_handler(ap);
830 }
831
832 static void pdc_post_internal_cmd(struct ata_queued_cmd *qc)
833 {
834 struct ata_port *ap = qc->ap;
835
836 /* make DMA engine forget about the failed command */
837 if (qc->flags & ATA_QCFLAG_FAILED)
838 pdc_reset_port(ap);
839 }
840
841 static void pdc_error_intr(struct ata_port *ap, struct ata_queued_cmd *qc,
842 u32 port_status, u32 err_mask)
843 {
844 struct ata_eh_info *ehi = &ap->link.eh_info;
845 unsigned int ac_err_mask = 0;
846
847 ata_ehi_clear_desc(ehi);
848 ata_ehi_push_desc(ehi, "port_status 0x%08x", port_status);
849 port_status &= err_mask;
850
851 if (port_status & PDC_DRIVE_ERR)
852 ac_err_mask |= AC_ERR_DEV;
853 if (port_status & (PDC_OVERRUN_ERR | PDC_UNDERRUN_ERR))
854 ac_err_mask |= AC_ERR_OTHER;
855 if (port_status & (PDC2_ATA_HBA_ERR | PDC2_ATA_DMA_CNT_ERR))
856 ac_err_mask |= AC_ERR_ATA_BUS;
857 if (port_status & (PDC_PH_ERR | PDC_SH_ERR | PDC_DH_ERR | PDC2_HTO_ERR
858 | PDC_PCI_SYS_ERR | PDC1_PCI_PARITY_ERR))
859 ac_err_mask |= AC_ERR_HOST_BUS;
860
861 if (sata_scr_valid(&ap->link)) {
862 u32 serror;
863
864 pdc_sata_scr_read(&ap->link, SCR_ERROR, &serror);
865 ehi->serror |= serror;
866 }
867
868 qc->err_mask |= ac_err_mask;
869
870 pdc_reset_port(ap);
871
872 ata_port_abort(ap);
873 }
874
875 static unsigned int pdc_host_intr(struct ata_port *ap,
876 struct ata_queued_cmd *qc)
877 {
878 unsigned int handled = 0;
879 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
880 u32 port_status, err_mask;
881
882 err_mask = PDC_ERR_MASK;
883 if (ap->flags & PDC_FLAG_GEN_II)
884 err_mask &= ~PDC1_ERR_MASK;
885 else
886 err_mask &= ~PDC2_ERR_MASK;
887 port_status = readl(ata_mmio + PDC_GLOBAL_CTL);
888 if (unlikely(port_status & err_mask)) {
889 pdc_error_intr(ap, qc, port_status, err_mask);
890 return 1;
891 }
892
893 switch (qc->tf.protocol) {
894 case ATA_PROT_DMA:
895 case ATA_PROT_NODATA:
896 case ATAPI_PROT_DMA:
897 case ATAPI_PROT_NODATA:
898 qc->err_mask |= ac_err_mask(ata_wait_idle(ap));
899 ata_qc_complete(qc);
900 handled = 1;
901 break;
902 default:
903 ap->stats.idle_irq++;
904 break;
905 }
906
907 return handled;
908 }
909
910 static void pdc_irq_clear(struct ata_port *ap)
911 {
912 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
913
914 readl(ata_mmio + PDC_COMMAND);
915 }
916
917 static irqreturn_t pdc_interrupt(int irq, void *dev_instance)
918 {
919 struct ata_host *host = dev_instance;
920 struct ata_port *ap;
921 u32 mask = 0;
922 unsigned int i, tmp;
923 unsigned int handled = 0;
924 void __iomem *host_mmio;
925 unsigned int hotplug_offset, ata_no;
926 u32 hotplug_status;
927 int is_sataii_tx4;
928
929 VPRINTK("ENTER\n");
930
931 if (!host || !host->iomap[PDC_MMIO_BAR]) {
932 VPRINTK("QUICK EXIT\n");
933 return IRQ_NONE;
934 }
935
936 host_mmio = host->iomap[PDC_MMIO_BAR];
937
938 spin_lock(&host->lock);
939
940 /* read and clear hotplug flags for all ports */
941 if (host->ports[0]->flags & PDC_FLAG_GEN_II) {
942 hotplug_offset = PDC2_SATA_PLUG_CSR;
943 hotplug_status = readl(host_mmio + hotplug_offset);
944 if (hotplug_status & 0xff)
945 writel(hotplug_status | 0xff, host_mmio + hotplug_offset);
946 hotplug_status &= 0xff; /* clear uninteresting bits */
947 } else
948 hotplug_status = 0;
949
950 /* reading should also clear interrupts */
951 mask = readl(host_mmio + PDC_INT_SEQMASK);
952
953 if (mask == 0xffffffff && hotplug_status == 0) {
954 VPRINTK("QUICK EXIT 2\n");
955 goto done_irq;
956 }
957
958 mask &= 0xffff; /* only 16 SEQIDs possible */
959 if (mask == 0 && hotplug_status == 0) {
960 VPRINTK("QUICK EXIT 3\n");
961 goto done_irq;
962 }
963
964 writel(mask, host_mmio + PDC_INT_SEQMASK);
965
966 is_sataii_tx4 = pdc_is_sataii_tx4(host->ports[0]->flags);
967
968 for (i = 0; i < host->n_ports; i++) {
969 VPRINTK("port %u\n", i);
970 ap = host->ports[i];
971
972 /* check for a plug or unplug event */
973 ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
974 tmp = hotplug_status & (0x11 << ata_no);
975 if (tmp) {
976 struct ata_eh_info *ehi = &ap->link.eh_info;
977 ata_ehi_clear_desc(ehi);
978 ata_ehi_hotplugged(ehi);
979 ata_ehi_push_desc(ehi, "hotplug_status %#x", tmp);
980 ata_port_freeze(ap);
981 ++handled;
982 continue;
983 }
984
985 /* check for a packet interrupt */
986 tmp = mask & (1 << (i + 1));
987 if (tmp) {
988 struct ata_queued_cmd *qc;
989
990 qc = ata_qc_from_tag(ap, ap->link.active_tag);
991 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING)))
992 handled += pdc_host_intr(ap, qc);
993 }
994 }
995
996 VPRINTK("EXIT\n");
997
998 done_irq:
999 spin_unlock(&host->lock);
1000 return IRQ_RETVAL(handled);
1001 }
1002
1003 static void pdc_packet_start(struct ata_queued_cmd *qc)
1004 {
1005 struct ata_port *ap = qc->ap;
1006 struct pdc_port_priv *pp = ap->private_data;
1007 void __iomem *host_mmio = ap->host->iomap[PDC_MMIO_BAR];
1008 void __iomem *ata_mmio = ap->ioaddr.cmd_addr;
1009 unsigned int port_no = ap->port_no;
1010 u8 seq = (u8) (port_no + 1);
1011
1012 VPRINTK("ENTER, ap %p\n", ap);
1013
1014 writel(0x00000001, host_mmio + (seq * 4));
1015 readl(host_mmio + (seq * 4)); /* flush */
1016
1017 pp->pkt[2] = seq;
1018 wmb(); /* flush PRD, pkt writes */
1019 writel(pp->pkt_dma, ata_mmio + PDC_PKT_SUBMIT);
1020 readl(ata_mmio + PDC_PKT_SUBMIT); /* flush */
1021 }
1022
1023 static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc)
1024 {
1025 switch (qc->tf.protocol) {
1026 case ATAPI_PROT_NODATA:
1027 if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
1028 break;
1029 /*FALLTHROUGH*/
1030 case ATA_PROT_NODATA:
1031 if (qc->tf.flags & ATA_TFLAG_POLLING)
1032 break;
1033 /*FALLTHROUGH*/
1034 case ATAPI_PROT_DMA:
1035 case ATA_PROT_DMA:
1036 pdc_packet_start(qc);
1037 return 0;
1038 default:
1039 break;
1040 }
1041 return ata_sff_qc_issue(qc);
1042 }
1043
1044 static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf)
1045 {
1046 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
1047 ata_sff_tf_load(ap, tf);
1048 }
1049
1050 static void pdc_exec_command_mmio(struct ata_port *ap,
1051 const struct ata_taskfile *tf)
1052 {
1053 WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA);
1054 ata_sff_exec_command(ap, tf);
1055 }
1056
1057 static int pdc_check_atapi_dma(struct ata_queued_cmd *qc)
1058 {
1059 u8 *scsicmd = qc->scsicmd->cmnd;
1060 int pio = 1; /* atapi dma off by default */
1061
1062 /* Whitelist commands that may use DMA. */
1063 switch (scsicmd[0]) {
1064 case WRITE_12:
1065 case WRITE_10:
1066 case WRITE_6:
1067 case READ_12:
1068 case READ_10:
1069 case READ_6:
1070 case 0xad: /* READ_DVD_STRUCTURE */
1071 case 0xbe: /* READ_CD */
1072 pio = 0;
1073 }
1074 /* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */
1075 if (scsicmd[0] == WRITE_10) {
1076 unsigned int lba =
1077 (scsicmd[2] << 24) |
1078 (scsicmd[3] << 16) |
1079 (scsicmd[4] << 8) |
1080 scsicmd[5];
1081 if (lba >= 0xFFFF4FA2)
1082 pio = 1;
1083 }
1084 return pio;
1085 }
1086
1087 static int pdc_old_sata_check_atapi_dma(struct ata_queued_cmd *qc)
1088 {
1089 /* First generation chips cannot use ATAPI DMA on SATA ports */
1090 return 1;
1091 }
1092
1093 static void pdc_ata_setup_port(struct ata_port *ap,
1094 void __iomem *base, void __iomem *scr_addr)
1095 {
1096 ap->ioaddr.cmd_addr = base;
1097 ap->ioaddr.data_addr = base;
1098 ap->ioaddr.feature_addr =
1099 ap->ioaddr.error_addr = base + 0x4;
1100 ap->ioaddr.nsect_addr = base + 0x8;
1101 ap->ioaddr.lbal_addr = base + 0xc;
1102 ap->ioaddr.lbam_addr = base + 0x10;
1103 ap->ioaddr.lbah_addr = base + 0x14;
1104 ap->ioaddr.device_addr = base + 0x18;
1105 ap->ioaddr.command_addr =
1106 ap->ioaddr.status_addr = base + 0x1c;
1107 ap->ioaddr.altstatus_addr =
1108 ap->ioaddr.ctl_addr = base + 0x38;
1109 ap->ioaddr.scr_addr = scr_addr;
1110 }
1111
1112 static void pdc_host_init(struct ata_host *host)
1113 {
1114 void __iomem *host_mmio = host->iomap[PDC_MMIO_BAR];
1115 int is_gen2 = host->ports[0]->flags & PDC_FLAG_GEN_II;
1116 int hotplug_offset;
1117 u32 tmp;
1118
1119 if (is_gen2)
1120 hotplug_offset = PDC2_SATA_PLUG_CSR;
1121 else
1122 hotplug_offset = PDC_SATA_PLUG_CSR;
1123
1124 /*
1125 * Except for the hotplug stuff, this is voodoo from the
1126 * Promise driver. Label this entire section
1127 * "TODO: figure out why we do this"
1128 */
1129
1130 /* enable BMR_BURST, maybe change FIFO_SHD to 8 dwords */
1131 tmp = readl(host_mmio + PDC_FLASH_CTL);
1132 tmp |= 0x02000; /* bit 13 (enable bmr burst) */
1133 if (!is_gen2)
1134 tmp |= 0x10000; /* bit 16 (fifo threshold at 8 dw) */
1135 writel(tmp, host_mmio + PDC_FLASH_CTL);
1136
1137 /* clear plug/unplug flags for all ports */
1138 tmp = readl(host_mmio + hotplug_offset);
1139 writel(tmp | 0xff, host_mmio + hotplug_offset);
1140
1141 tmp = readl(host_mmio + hotplug_offset);
1142 if (is_gen2) /* unmask plug/unplug ints */
1143 writel(tmp & ~0xff0000, host_mmio + hotplug_offset);
1144 else /* mask plug/unplug ints */
1145 writel(tmp | 0xff0000, host_mmio + hotplug_offset);
1146
1147 /* don't initialise TBG or SLEW on 2nd generation chips */
1148 if (is_gen2)
1149 return;
1150
1151 /* reduce TBG clock to 133 Mhz. */
1152 tmp = readl(host_mmio + PDC_TBG_MODE);
1153 tmp &= ~0x30000; /* clear bit 17, 16*/
1154 tmp |= 0x10000; /* set bit 17:16 = 0:1 */
1155 writel(tmp, host_mmio + PDC_TBG_MODE);
1156
1157 readl(host_mmio + PDC_TBG_MODE); /* flush */
1158 msleep(10);
1159
1160 /* adjust slew rate control register. */
1161 tmp = readl(host_mmio + PDC_SLEW_CTL);
1162 tmp &= 0xFFFFF03F; /* clear bit 11 ~ 6 */
1163 tmp |= 0x00000900; /* set bit 11-9 = 100b , bit 8-6 = 100 */
1164 writel(tmp, host_mmio + PDC_SLEW_CTL);
1165 }
1166
1167 static int pdc_ata_init_one(struct pci_dev *pdev,
1168 const struct pci_device_id *ent)
1169 {
1170 const struct ata_port_info *pi = &pdc_port_info[ent->driver_data];
1171 const struct ata_port_info *ppi[PDC_MAX_PORTS];
1172 struct ata_host *host;
1173 struct pdc_host_priv *hpriv;
1174 void __iomem *host_mmio;
1175 int n_ports, i, rc;
1176 int is_sataii_tx4;
1177
1178 ata_print_version_once(&pdev->dev, DRV_VERSION);
1179
1180 /* enable and acquire resources */
1181 rc = pcim_enable_device(pdev);
1182 if (rc)
1183 return rc;
1184
1185 rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME);
1186 if (rc == -EBUSY)
1187 pcim_pin_device(pdev);
1188 if (rc)
1189 return rc;
1190 host_mmio = pcim_iomap_table(pdev)[PDC_MMIO_BAR];
1191
1192 /* determine port configuration and setup host */
1193 n_ports = 2;
1194 if (pi->flags & PDC_FLAG_4_PORTS)
1195 n_ports = 4;
1196 for (i = 0; i < n_ports; i++)
1197 ppi[i] = pi;
1198
1199 if (pi->flags & PDC_FLAG_SATA_PATA) {
1200 u8 tmp = readb(host_mmio + PDC_FLASH_CTL + 1);
1201 if (!(tmp & 0x80))
1202 ppi[n_ports++] = pi + 1;
1203 }
1204
1205 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
1206 if (!host) {
1207 dev_err(&pdev->dev, "failed to allocate host\n");
1208 return -ENOMEM;
1209 }
1210 hpriv = devm_kzalloc(&pdev->dev, sizeof *hpriv, GFP_KERNEL);
1211 if (!hpriv)
1212 return -ENOMEM;
1213 spin_lock_init(&hpriv->hard_reset_lock);
1214 host->private_data = hpriv;
1215 host->iomap = pcim_iomap_table(pdev);
1216
1217 is_sataii_tx4 = pdc_is_sataii_tx4(pi->flags);
1218 for (i = 0; i < host->n_ports; i++) {
1219 struct ata_port *ap = host->ports[i];
1220 unsigned int ata_no = pdc_port_no_to_ata_no(i, is_sataii_tx4);
1221 unsigned int ata_offset = 0x200 + ata_no * 0x80;
1222 unsigned int scr_offset = 0x400 + ata_no * 0x100;
1223
1224 pdc_ata_setup_port(ap, host_mmio + ata_offset, host_mmio + scr_offset);
1225
1226 ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio");
1227 ata_port_pbar_desc(ap, PDC_MMIO_BAR, ata_offset, "ata");
1228 }
1229
1230 /* initialize adapter */
1231 pdc_host_init(host);
1232
1233 rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK);
1234 if (rc)
1235 return rc;
1236 rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK);
1237 if (rc)
1238 return rc;
1239
1240 /* start host, request IRQ and attach */
1241 pci_set_master(pdev);
1242 return ata_host_activate(host, pdev->irq, pdc_interrupt, IRQF_SHARED,
1243 &pdc_ata_sht);
1244 }
1245
1246 module_pci_driver(pdc_ata_pci_driver);
1247
1248 MODULE_AUTHOR("Jeff Garzik");
1249 MODULE_DESCRIPTION("Promise ATA TX2/TX4/TX4000 low-level driver");
1250 MODULE_LICENSE("GPL");
1251 MODULE_DEVICE_TABLE(pci, pdc_ata_pci_tbl);
1252 MODULE_VERSION(DRV_VERSION);
Mirror of linux-2.6-arm at arm.linux.org.uk