blob: 8108eb0654448f8eba16da40e4aace400ff8087a [file] [log] [blame]
Vladimir Barinov163cf81d2013-02-20 23:10:29 +03001/*
2 * Renesas R-Car SATA driver
3 *
4 * Author: Vladimir Barinov <source@cogentembedded.com>
5 * Copyright (C) 2013 Cogent Embedded, Inc.
6 * Copyright (C) 2013 Renesas Solutions Corp.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/ata.h>
17#include <linux/libata.h>
18#include <linux/platform_device.h>
19#include <linux/clk.h>
Sachin Kamat2de1d5e2013-04-04 14:56:36 +053020#include <linux/err.h>
Vladimir Barinov163cf81d2013-02-20 23:10:29 +030021
22#define DRV_NAME "sata_rcar"
23
24/* SH-Navi2G/ATAPI-ATA compatible task registers */
25#define DATA_REG 0x100
26#define SDEVCON_REG 0x138
27
28/* SH-Navi2G/ATAPI module compatible control registers */
29#define ATAPI_CONTROL1_REG 0x180
30#define ATAPI_STATUS_REG 0x184
31#define ATAPI_INT_ENABLE_REG 0x188
32#define ATAPI_DTB_ADR_REG 0x198
33#define ATAPI_DMA_START_ADR_REG 0x19C
34#define ATAPI_DMA_TRANS_CNT_REG 0x1A0
35#define ATAPI_CONTROL2_REG 0x1A4
36#define ATAPI_SIG_ST_REG 0x1B0
37#define ATAPI_BYTE_SWAP_REG 0x1BC
38
39/* ATAPI control 1 register (ATAPI_CONTROL1) bits */
40#define ATAPI_CONTROL1_ISM BIT(16)
41#define ATAPI_CONTROL1_DTA32M BIT(11)
42#define ATAPI_CONTROL1_RESET BIT(7)
43#define ATAPI_CONTROL1_DESE BIT(3)
44#define ATAPI_CONTROL1_RW BIT(2)
45#define ATAPI_CONTROL1_STOP BIT(1)
46#define ATAPI_CONTROL1_START BIT(0)
47
48/* ATAPI status register (ATAPI_STATUS) bits */
49#define ATAPI_STATUS_SATAINT BIT(11)
50#define ATAPI_STATUS_DNEND BIT(6)
51#define ATAPI_STATUS_DEVTRM BIT(5)
52#define ATAPI_STATUS_DEVINT BIT(4)
53#define ATAPI_STATUS_ERR BIT(2)
54#define ATAPI_STATUS_NEND BIT(1)
55#define ATAPI_STATUS_ACT BIT(0)
56
57/* Interrupt enable register (ATAPI_INT_ENABLE) bits */
58#define ATAPI_INT_ENABLE_SATAINT BIT(11)
59#define ATAPI_INT_ENABLE_DNEND BIT(6)
60#define ATAPI_INT_ENABLE_DEVTRM BIT(5)
61#define ATAPI_INT_ENABLE_DEVINT BIT(4)
62#define ATAPI_INT_ENABLE_ERR BIT(2)
63#define ATAPI_INT_ENABLE_NEND BIT(1)
64#define ATAPI_INT_ENABLE_ACT BIT(0)
65
66/* Access control registers for physical layer control register */
67#define SATAPHYADDR_REG 0x200
68#define SATAPHYWDATA_REG 0x204
69#define SATAPHYACCEN_REG 0x208
70#define SATAPHYRESET_REG 0x20C
71#define SATAPHYRDATA_REG 0x210
72#define SATAPHYACK_REG 0x214
73
74/* Physical layer control address command register (SATAPHYADDR) bits */
75#define SATAPHYADDR_PHYRATEMODE BIT(10)
76#define SATAPHYADDR_PHYCMD_READ BIT(9)
77#define SATAPHYADDR_PHYCMD_WRITE BIT(8)
78
79/* Physical layer control enable register (SATAPHYACCEN) bits */
80#define SATAPHYACCEN_PHYLANE BIT(0)
81
82/* Physical layer control reset register (SATAPHYRESET) bits */
83#define SATAPHYRESET_PHYRST BIT(1)
84#define SATAPHYRESET_PHYSRES BIT(0)
85
86/* Physical layer control acknowledge register (SATAPHYACK) bits */
87#define SATAPHYACK_PHYACK BIT(0)
88
89/* Serial-ATA HOST control registers */
90#define BISTCONF_REG 0x102C
91#define SDATA_REG 0x1100
92#define SSDEVCON_REG 0x1204
93
94#define SCRSSTS_REG 0x1400
95#define SCRSERR_REG 0x1404
96#define SCRSCON_REG 0x1408
97#define SCRSACT_REG 0x140C
98
99#define SATAINTSTAT_REG 0x1508
100#define SATAINTMASK_REG 0x150C
101
102/* SATA INT status register (SATAINTSTAT) bits */
103#define SATAINTSTAT_SERR BIT(3)
104#define SATAINTSTAT_ATA BIT(0)
105
106/* SATA INT mask register (SATAINTSTAT) bits */
107#define SATAINTMASK_SERRMSK BIT(3)
108#define SATAINTMASK_ERRMSK BIT(2)
109#define SATAINTMASK_ERRCRTMSK BIT(1)
110#define SATAINTMASK_ATAMSK BIT(0)
111
112#define SATA_RCAR_INT_MASK (SATAINTMASK_SERRMSK | \
113 SATAINTMASK_ATAMSK)
114
115/* Physical Layer Control Registers */
116#define SATAPCTLR1_REG 0x43
117#define SATAPCTLR2_REG 0x52
118#define SATAPCTLR3_REG 0x5A
119#define SATAPCTLR4_REG 0x60
120
121/* Descriptor table word 0 bit (when DTA32M = 1) */
122#define SATA_RCAR_DTEND BIT(0)
123
Sergei Shtylyov8bfbeed2013-05-28 02:45:08 +0400124#define SATA_RCAR_DMA_BOUNDARY 0x1FFFFFFEUL
125
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300126struct sata_rcar_priv {
127 void __iomem *base;
128 struct clk *clk;
129};
130
131static void sata_rcar_phy_initialize(struct sata_rcar_priv *priv)
132{
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400133 void __iomem *base = priv->base;
134
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300135 /* idle state */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400136 iowrite32(0, base + SATAPHYADDR_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300137 /* reset */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400138 iowrite32(SATAPHYRESET_PHYRST, base + SATAPHYRESET_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300139 udelay(10);
140 /* deassert reset */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400141 iowrite32(0, base + SATAPHYRESET_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300142}
143
144static void sata_rcar_phy_write(struct sata_rcar_priv *priv, u16 reg, u32 val,
145 int group)
146{
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400147 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300148 int timeout;
149
150 /* deassert reset */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400151 iowrite32(0, base + SATAPHYRESET_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300152 /* lane 1 */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400153 iowrite32(SATAPHYACCEN_PHYLANE, base + SATAPHYACCEN_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300154 /* write phy register value */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400155 iowrite32(val, base + SATAPHYWDATA_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300156 /* set register group */
157 if (group)
158 reg |= SATAPHYADDR_PHYRATEMODE;
159 /* write command */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400160 iowrite32(SATAPHYADDR_PHYCMD_WRITE | reg, base + SATAPHYADDR_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300161 /* wait for ack */
162 for (timeout = 0; timeout < 100; timeout++) {
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400163 val = ioread32(base + SATAPHYACK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300164 if (val & SATAPHYACK_PHYACK)
165 break;
166 }
167 if (timeout >= 100)
168 pr_err("%s timeout\n", __func__);
169 /* idle state */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400170 iowrite32(0, base + SATAPHYADDR_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300171}
172
173static void sata_rcar_freeze(struct ata_port *ap)
174{
175 struct sata_rcar_priv *priv = ap->host->private_data;
176
177 /* mask */
178 iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
179
180 ata_sff_freeze(ap);
181}
182
183static void sata_rcar_thaw(struct ata_port *ap)
184{
185 struct sata_rcar_priv *priv = ap->host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400186 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300187
188 /* ack */
Tejun Heo5a0a6a42013-07-02 19:54:16 -0700189 iowrite32(~(u32)SATA_RCAR_INT_MASK, base + SATAINTSTAT_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300190
191 ata_sff_thaw(ap);
192
193 /* unmask */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400194 iowrite32(0x7ff & ~SATA_RCAR_INT_MASK, base + SATAINTMASK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300195}
196
197static void sata_rcar_ioread16_rep(void __iomem *reg, void *buffer, int count)
198{
199 u16 *ptr = buffer;
200
201 while (count--) {
202 u16 data = ioread32(reg);
203
204 *ptr++ = data;
205 }
206}
207
208static void sata_rcar_iowrite16_rep(void __iomem *reg, void *buffer, int count)
209{
210 const u16 *ptr = buffer;
211
212 while (count--)
213 iowrite32(*ptr++, reg);
214}
215
216static u8 sata_rcar_check_status(struct ata_port *ap)
217{
218 return ioread32(ap->ioaddr.status_addr);
219}
220
221static u8 sata_rcar_check_altstatus(struct ata_port *ap)
222{
223 return ioread32(ap->ioaddr.altstatus_addr);
224}
225
226static void sata_rcar_set_devctl(struct ata_port *ap, u8 ctl)
227{
228 iowrite32(ctl, ap->ioaddr.ctl_addr);
229}
230
231static void sata_rcar_dev_select(struct ata_port *ap, unsigned int device)
232{
233 iowrite32(ATA_DEVICE_OBS, ap->ioaddr.device_addr);
234 ata_sff_pause(ap); /* needed; also flushes, for mmio */
235}
236
237static unsigned int sata_rcar_ata_devchk(struct ata_port *ap,
238 unsigned int device)
239{
240 struct ata_ioports *ioaddr = &ap->ioaddr;
241 u8 nsect, lbal;
242
243 sata_rcar_dev_select(ap, device);
244
245 iowrite32(0x55, ioaddr->nsect_addr);
246 iowrite32(0xaa, ioaddr->lbal_addr);
247
248 iowrite32(0xaa, ioaddr->nsect_addr);
249 iowrite32(0x55, ioaddr->lbal_addr);
250
251 iowrite32(0x55, ioaddr->nsect_addr);
252 iowrite32(0xaa, ioaddr->lbal_addr);
253
254 nsect = ioread32(ioaddr->nsect_addr);
255 lbal = ioread32(ioaddr->lbal_addr);
256
257 if (nsect == 0x55 && lbal == 0xaa)
258 return 1; /* found a device */
259
260 return 0; /* nothing found */
261}
262
263static int sata_rcar_wait_after_reset(struct ata_link *link,
264 unsigned long deadline)
265{
266 struct ata_port *ap = link->ap;
267
268 ata_msleep(ap, ATA_WAIT_AFTER_RESET);
269
270 return ata_sff_wait_ready(link, deadline);
271}
272
273static int sata_rcar_bus_softreset(struct ata_port *ap, unsigned long deadline)
274{
275 struct ata_ioports *ioaddr = &ap->ioaddr;
276
277 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
278
279 /* software reset. causes dev0 to be selected */
280 iowrite32(ap->ctl, ioaddr->ctl_addr);
281 udelay(20);
282 iowrite32(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
283 udelay(20);
284 iowrite32(ap->ctl, ioaddr->ctl_addr);
285 ap->last_ctl = ap->ctl;
286
287 /* wait the port to become ready */
288 return sata_rcar_wait_after_reset(&ap->link, deadline);
289}
290
291static int sata_rcar_softreset(struct ata_link *link, unsigned int *classes,
292 unsigned long deadline)
293{
294 struct ata_port *ap = link->ap;
295 unsigned int devmask = 0;
296 int rc;
297 u8 err;
298
299 /* determine if device 0 is present */
300 if (sata_rcar_ata_devchk(ap, 0))
301 devmask |= 1 << 0;
302
303 /* issue bus reset */
304 DPRINTK("about to softreset, devmask=%x\n", devmask);
305 rc = sata_rcar_bus_softreset(ap, deadline);
306 /* if link is occupied, -ENODEV too is an error */
307 if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
308 ata_link_err(link, "SRST failed (errno=%d)\n", rc);
309 return rc;
310 }
311
312 /* determine by signature whether we have ATA or ATAPI devices */
313 classes[0] = ata_sff_dev_classify(&link->device[0], devmask, &err);
314
315 DPRINTK("classes[0]=%u\n", classes[0]);
316 return 0;
317}
318
319static void sata_rcar_tf_load(struct ata_port *ap,
320 const struct ata_taskfile *tf)
321{
322 struct ata_ioports *ioaddr = &ap->ioaddr;
323 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
324
325 if (tf->ctl != ap->last_ctl) {
326 iowrite32(tf->ctl, ioaddr->ctl_addr);
327 ap->last_ctl = tf->ctl;
328 ata_wait_idle(ap);
329 }
330
331 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
332 iowrite32(tf->hob_feature, ioaddr->feature_addr);
333 iowrite32(tf->hob_nsect, ioaddr->nsect_addr);
334 iowrite32(tf->hob_lbal, ioaddr->lbal_addr);
335 iowrite32(tf->hob_lbam, ioaddr->lbam_addr);
336 iowrite32(tf->hob_lbah, ioaddr->lbah_addr);
337 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
338 tf->hob_feature,
339 tf->hob_nsect,
340 tf->hob_lbal,
341 tf->hob_lbam,
342 tf->hob_lbah);
343 }
344
345 if (is_addr) {
346 iowrite32(tf->feature, ioaddr->feature_addr);
347 iowrite32(tf->nsect, ioaddr->nsect_addr);
348 iowrite32(tf->lbal, ioaddr->lbal_addr);
349 iowrite32(tf->lbam, ioaddr->lbam_addr);
350 iowrite32(tf->lbah, ioaddr->lbah_addr);
351 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
352 tf->feature,
353 tf->nsect,
354 tf->lbal,
355 tf->lbam,
356 tf->lbah);
357 }
358
359 if (tf->flags & ATA_TFLAG_DEVICE) {
360 iowrite32(tf->device, ioaddr->device_addr);
361 VPRINTK("device 0x%X\n", tf->device);
362 }
363
364 ata_wait_idle(ap);
365}
366
367static void sata_rcar_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
368{
369 struct ata_ioports *ioaddr = &ap->ioaddr;
370
371 tf->command = sata_rcar_check_status(ap);
372 tf->feature = ioread32(ioaddr->error_addr);
373 tf->nsect = ioread32(ioaddr->nsect_addr);
374 tf->lbal = ioread32(ioaddr->lbal_addr);
375 tf->lbam = ioread32(ioaddr->lbam_addr);
376 tf->lbah = ioread32(ioaddr->lbah_addr);
377 tf->device = ioread32(ioaddr->device_addr);
378
379 if (tf->flags & ATA_TFLAG_LBA48) {
380 iowrite32(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
381 tf->hob_feature = ioread32(ioaddr->error_addr);
382 tf->hob_nsect = ioread32(ioaddr->nsect_addr);
383 tf->hob_lbal = ioread32(ioaddr->lbal_addr);
384 tf->hob_lbam = ioread32(ioaddr->lbam_addr);
385 tf->hob_lbah = ioread32(ioaddr->lbah_addr);
386 iowrite32(tf->ctl, ioaddr->ctl_addr);
387 ap->last_ctl = tf->ctl;
388 }
389}
390
391static void sata_rcar_exec_command(struct ata_port *ap,
392 const struct ata_taskfile *tf)
393{
394 DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
395
396 iowrite32(tf->command, ap->ioaddr.command_addr);
397 ata_sff_pause(ap);
398}
399
400static unsigned int sata_rcar_data_xfer(struct ata_device *dev,
401 unsigned char *buf,
402 unsigned int buflen, int rw)
403{
404 struct ata_port *ap = dev->link->ap;
405 void __iomem *data_addr = ap->ioaddr.data_addr;
406 unsigned int words = buflen >> 1;
407
408 /* Transfer multiple of 2 bytes */
409 if (rw == READ)
410 sata_rcar_ioread16_rep(data_addr, buf, words);
411 else
412 sata_rcar_iowrite16_rep(data_addr, buf, words);
413
414 /* Transfer trailing byte, if any. */
415 if (unlikely(buflen & 0x01)) {
416 unsigned char pad[2] = { };
417
418 /* Point buf to the tail of buffer */
419 buf += buflen - 1;
420
421 /*
422 * Use io*16_rep() accessors here as well to avoid pointlessly
423 * swapping bytes to and from on the big endian machines...
424 */
425 if (rw == READ) {
426 sata_rcar_ioread16_rep(data_addr, pad, 1);
427 *buf = pad[0];
428 } else {
429 pad[0] = *buf;
430 sata_rcar_iowrite16_rep(data_addr, pad, 1);
431 }
432 words++;
433 }
434
435 return words << 1;
436}
437
438static void sata_rcar_drain_fifo(struct ata_queued_cmd *qc)
439{
440 int count;
441 struct ata_port *ap;
442
443 /* We only need to flush incoming data when a command was running */
444 if (qc == NULL || qc->dma_dir == DMA_TO_DEVICE)
445 return;
446
447 ap = qc->ap;
448 /* Drain up to 64K of data before we give up this recovery method */
449 for (count = 0; (ap->ops->sff_check_status(ap) & ATA_DRQ) &&
450 count < 65536; count += 2)
451 ioread32(ap->ioaddr.data_addr);
452
453 /* Can become DEBUG later */
454 if (count)
455 ata_port_dbg(ap, "drained %d bytes to clear DRQ\n", count);
456}
457
458static int sata_rcar_scr_read(struct ata_link *link, unsigned int sc_reg,
459 u32 *val)
460{
461 if (sc_reg > SCR_ACTIVE)
462 return -EINVAL;
463
464 *val = ioread32(link->ap->ioaddr.scr_addr + (sc_reg << 2));
465 return 0;
466}
467
468static int sata_rcar_scr_write(struct ata_link *link, unsigned int sc_reg,
469 u32 val)
470{
471 if (sc_reg > SCR_ACTIVE)
472 return -EINVAL;
473
474 iowrite32(val, link->ap->ioaddr.scr_addr + (sc_reg << 2));
475 return 0;
476}
477
478static void sata_rcar_bmdma_fill_sg(struct ata_queued_cmd *qc)
479{
480 struct ata_port *ap = qc->ap;
481 struct ata_bmdma_prd *prd = ap->bmdma_prd;
482 struct scatterlist *sg;
Sergei Shtylyov333279c2013-05-28 02:43:23 +0400483 unsigned int si;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300484
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300485 for_each_sg(qc->sg, sg, qc->n_elem, si) {
Sergei Shtylyov333279c2013-05-28 02:43:23 +0400486 u32 addr, sg_len;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300487
488 /*
489 * Note: h/w doesn't support 64-bit, so we unconditionally
490 * truncate dma_addr_t to u32.
491 */
492 addr = (u32)sg_dma_address(sg);
493 sg_len = sg_dma_len(sg);
494
Sergei Shtylyov333279c2013-05-28 02:43:23 +0400495 prd[si].addr = cpu_to_le32(addr);
496 prd[si].flags_len = cpu_to_le32(sg_len);
497 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", si, addr, sg_len);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300498 }
499
500 /* end-of-table flag */
Sergei Shtylyov333279c2013-05-28 02:43:23 +0400501 prd[si - 1].addr |= cpu_to_le32(SATA_RCAR_DTEND);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300502}
503
504static void sata_rcar_qc_prep(struct ata_queued_cmd *qc)
505{
506 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
507 return;
508
509 sata_rcar_bmdma_fill_sg(qc);
510}
511
512static void sata_rcar_bmdma_setup(struct ata_queued_cmd *qc)
513{
514 struct ata_port *ap = qc->ap;
515 unsigned int rw = qc->tf.flags & ATA_TFLAG_WRITE;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300516 struct sata_rcar_priv *priv = ap->host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400517 void __iomem *base = priv->base;
518 u32 dmactl;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300519
520 /* load PRD table addr. */
521 mb(); /* make sure PRD table writes are visible to controller */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400522 iowrite32(ap->bmdma_prd_dma, base + ATAPI_DTB_ADR_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300523
524 /* specify data direction, triple-check start bit is clear */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400525 dmactl = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300526 dmactl &= ~(ATAPI_CONTROL1_RW | ATAPI_CONTROL1_STOP);
527 if (dmactl & ATAPI_CONTROL1_START) {
528 dmactl &= ~ATAPI_CONTROL1_START;
529 dmactl |= ATAPI_CONTROL1_STOP;
530 }
531 if (!rw)
532 dmactl |= ATAPI_CONTROL1_RW;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400533 iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300534
535 /* issue r/w command */
536 ap->ops->sff_exec_command(ap, &qc->tf);
537}
538
539static void sata_rcar_bmdma_start(struct ata_queued_cmd *qc)
540{
541 struct ata_port *ap = qc->ap;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300542 struct sata_rcar_priv *priv = ap->host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400543 void __iomem *base = priv->base;
544 u32 dmactl;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300545
546 /* start host DMA transaction */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400547 dmactl = ioread32(base + ATAPI_CONTROL1_REG);
Sergei Shtylyovdf7e1312013-05-21 23:07:54 +0400548 dmactl &= ~ATAPI_CONTROL1_STOP;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300549 dmactl |= ATAPI_CONTROL1_START;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400550 iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300551}
552
553static void sata_rcar_bmdma_stop(struct ata_queued_cmd *qc)
554{
555 struct ata_port *ap = qc->ap;
556 struct sata_rcar_priv *priv = ap->host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400557 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300558 u32 dmactl;
559
560 /* force termination of DMA transfer if active */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400561 dmactl = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300562 if (dmactl & ATAPI_CONTROL1_START) {
563 dmactl &= ~ATAPI_CONTROL1_START;
564 dmactl |= ATAPI_CONTROL1_STOP;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400565 iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300566 }
567
568 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
569 ata_sff_dma_pause(ap);
570}
571
572static u8 sata_rcar_bmdma_status(struct ata_port *ap)
573{
574 struct sata_rcar_priv *priv = ap->host->private_data;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300575 u8 host_stat = 0;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400576 u32 status;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300577
578 status = ioread32(priv->base + ATAPI_STATUS_REG);
579 if (status & ATAPI_STATUS_DEVINT)
580 host_stat |= ATA_DMA_INTR;
581 if (status & ATAPI_STATUS_ACT)
582 host_stat |= ATA_DMA_ACTIVE;
583
584 return host_stat;
585}
586
587static struct scsi_host_template sata_rcar_sht = {
Sergei Shtylyov8bfbeed2013-05-28 02:45:08 +0400588 ATA_BASE_SHT(DRV_NAME),
589 /*
590 * This controller allows transfer chunks up to 512MB which cross 64KB
591 * boundaries, therefore the DMA limits are more relaxed than standard
592 * ATA SFF.
593 */
594 .sg_tablesize = ATA_MAX_PRD,
595 .dma_boundary = SATA_RCAR_DMA_BOUNDARY,
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300596};
597
598static struct ata_port_operations sata_rcar_port_ops = {
599 .inherits = &ata_bmdma_port_ops,
600
601 .freeze = sata_rcar_freeze,
602 .thaw = sata_rcar_thaw,
603 .softreset = sata_rcar_softreset,
604
605 .scr_read = sata_rcar_scr_read,
606 .scr_write = sata_rcar_scr_write,
607
608 .sff_dev_select = sata_rcar_dev_select,
609 .sff_set_devctl = sata_rcar_set_devctl,
610 .sff_check_status = sata_rcar_check_status,
611 .sff_check_altstatus = sata_rcar_check_altstatus,
612 .sff_tf_load = sata_rcar_tf_load,
613 .sff_tf_read = sata_rcar_tf_read,
614 .sff_exec_command = sata_rcar_exec_command,
615 .sff_data_xfer = sata_rcar_data_xfer,
616 .sff_drain_fifo = sata_rcar_drain_fifo,
617
618 .qc_prep = sata_rcar_qc_prep,
619
620 .bmdma_setup = sata_rcar_bmdma_setup,
621 .bmdma_start = sata_rcar_bmdma_start,
622 .bmdma_stop = sata_rcar_bmdma_stop,
623 .bmdma_status = sata_rcar_bmdma_status,
624};
625
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400626static void sata_rcar_serr_interrupt(struct ata_port *ap)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300627{
628 struct sata_rcar_priv *priv = ap->host->private_data;
629 struct ata_eh_info *ehi = &ap->link.eh_info;
630 int freeze = 0;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300631 u32 serror;
632
633 serror = ioread32(priv->base + SCRSERR_REG);
634 if (!serror)
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400635 return;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300636
637 DPRINTK("SError @host_intr: 0x%x\n", serror);
638
639 /* first, analyze and record host port events */
640 ata_ehi_clear_desc(ehi);
641
642 if (serror & (SERR_DEV_XCHG | SERR_PHYRDY_CHG)) {
643 /* Setup a soft-reset EH action */
644 ata_ehi_hotplugged(ehi);
645 ata_ehi_push_desc(ehi, "%s", "hotplug");
646
647 freeze = serror & SERR_COMM_WAKE ? 0 : 1;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300648 }
649
650 /* freeze or abort */
651 if (freeze)
652 ata_port_freeze(ap);
653 else
654 ata_port_abort(ap);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300655}
656
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400657static void sata_rcar_ata_interrupt(struct ata_port *ap)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300658{
659 struct ata_queued_cmd *qc;
660 int handled = 0;
661
662 qc = ata_qc_from_tag(ap, ap->link.active_tag);
663 if (qc)
664 handled |= ata_bmdma_port_intr(ap, qc);
665
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400666 /* be sure to clear ATA interrupt */
667 if (!handled)
668 sata_rcar_check_status(ap);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300669}
670
671static irqreturn_t sata_rcar_interrupt(int irq, void *dev_instance)
672{
673 struct ata_host *host = dev_instance;
674 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400675 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300676 unsigned int handled = 0;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400677 struct ata_port *ap;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300678 u32 sataintstat;
679 unsigned long flags;
680
681 spin_lock_irqsave(&host->lock, flags);
682
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400683 sataintstat = ioread32(base + SATAINTSTAT_REG);
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400684 sataintstat &= SATA_RCAR_INT_MASK;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300685 if (!sataintstat)
686 goto done;
687 /* ack */
Tejun Heo5a0a6a42013-07-02 19:54:16 -0700688 iowrite32(~sataintstat & 0x7ff, base + SATAINTSTAT_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300689
690 ap = host->ports[0];
691
692 if (sataintstat & SATAINTSTAT_ATA)
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400693 sata_rcar_ata_interrupt(ap);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300694
695 if (sataintstat & SATAINTSTAT_SERR)
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400696 sata_rcar_serr_interrupt(ap);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300697
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400698 handled = 1;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300699done:
700 spin_unlock_irqrestore(&host->lock, flags);
701
702 return IRQ_RETVAL(handled);
703}
704
705static void sata_rcar_setup_port(struct ata_host *host)
706{
707 struct ata_port *ap = host->ports[0];
708 struct ata_ioports *ioaddr = &ap->ioaddr;
709 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400710 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300711
712 ap->ops = &sata_rcar_port_ops;
713 ap->pio_mask = ATA_PIO4;
714 ap->udma_mask = ATA_UDMA6;
715 ap->flags |= ATA_FLAG_SATA;
716
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400717 ioaddr->cmd_addr = base + SDATA_REG;
718 ioaddr->ctl_addr = base + SSDEVCON_REG;
719 ioaddr->scr_addr = base + SCRSSTS_REG;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300720 ioaddr->altstatus_addr = ioaddr->ctl_addr;
721
722 ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << 2);
723 ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << 2);
724 ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << 2);
725 ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << 2);
726 ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << 2);
727 ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << 2);
728 ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << 2);
729 ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << 2);
730 ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << 2);
731 ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << 2);
732}
733
734static void sata_rcar_init_controller(struct ata_host *host)
735{
736 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400737 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300738 u32 val;
739
740 /* reset and setup phy */
741 sata_rcar_phy_initialize(priv);
742 sata_rcar_phy_write(priv, SATAPCTLR1_REG, 0x00200188, 0);
743 sata_rcar_phy_write(priv, SATAPCTLR1_REG, 0x00200188, 1);
744 sata_rcar_phy_write(priv, SATAPCTLR3_REG, 0x0000A061, 0);
745 sata_rcar_phy_write(priv, SATAPCTLR2_REG, 0x20000000, 0);
746 sata_rcar_phy_write(priv, SATAPCTLR2_REG, 0x20000000, 1);
747 sata_rcar_phy_write(priv, SATAPCTLR4_REG, 0x28E80000, 0);
748
749 /* SATA-IP reset state */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400750 val = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300751 val |= ATAPI_CONTROL1_RESET;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400752 iowrite32(val, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300753
754 /* ISM mode, PRD mode, DTEND flag at bit 0 */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400755 val = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300756 val |= ATAPI_CONTROL1_ISM;
757 val |= ATAPI_CONTROL1_DESE;
758 val |= ATAPI_CONTROL1_DTA32M;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400759 iowrite32(val, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300760
761 /* Release the SATA-IP from the reset state */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400762 val = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300763 val &= ~ATAPI_CONTROL1_RESET;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400764 iowrite32(val, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300765
766 /* ack and mask */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400767 iowrite32(0, base + SATAINTSTAT_REG);
768 iowrite32(0x7ff, base + SATAINTMASK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300769 /* enable interrupts */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400770 iowrite32(ATAPI_INT_ENABLE_SATAINT, base + ATAPI_INT_ENABLE_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300771}
772
773static int sata_rcar_probe(struct platform_device *pdev)
774{
775 struct ata_host *host;
776 struct sata_rcar_priv *priv;
777 struct resource *mem;
778 int irq;
779 int ret = 0;
780
781 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
782 if (mem == NULL)
783 return -EINVAL;
784
785 irq = platform_get_irq(pdev, 0);
786 if (irq <= 0)
787 return -EINVAL;
788
789 priv = devm_kzalloc(&pdev->dev, sizeof(struct sata_rcar_priv),
790 GFP_KERNEL);
791 if (!priv)
792 return -ENOMEM;
793
794 priv->clk = devm_clk_get(&pdev->dev, NULL);
795 if (IS_ERR(priv->clk)) {
796 dev_err(&pdev->dev, "failed to get access to sata clock\n");
797 return PTR_ERR(priv->clk);
798 }
799 clk_enable(priv->clk);
800
801 host = ata_host_alloc(&pdev->dev, 1);
802 if (!host) {
803 dev_err(&pdev->dev, "ata_host_alloc failed\n");
804 ret = -ENOMEM;
805 goto cleanup;
806 }
807
808 host->private_data = priv;
809
Sachin Kamat2de1d5e2013-04-04 14:56:36 +0530810 priv->base = devm_ioremap_resource(&pdev->dev, mem);
811 if (IS_ERR(priv->base)) {
812 ret = PTR_ERR(priv->base);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300813 goto cleanup;
814 }
815
816 /* setup port */
817 sata_rcar_setup_port(host);
818
819 /* initialize host controller */
820 sata_rcar_init_controller(host);
821
822 ret = ata_host_activate(host, irq, sata_rcar_interrupt, 0,
823 &sata_rcar_sht);
824 if (!ret)
825 return 0;
826
827cleanup:
828 clk_disable(priv->clk);
829
830 return ret;
831}
832
833static int sata_rcar_remove(struct platform_device *pdev)
834{
Jingoo Hand89995d2013-05-23 19:41:21 +0900835 struct ata_host *host = platform_get_drvdata(pdev);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300836 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400837 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300838
839 ata_host_detach(host);
840
841 /* disable interrupts */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400842 iowrite32(0, base + ATAPI_INT_ENABLE_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300843 /* ack and mask */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400844 iowrite32(0, base + SATAINTSTAT_REG);
845 iowrite32(0x7ff, base + SATAINTMASK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300846
847 clk_disable(priv->clk);
848
849 return 0;
850}
851
852#ifdef CONFIG_PM
853static int sata_rcar_suspend(struct device *dev)
854{
855 struct ata_host *host = dev_get_drvdata(dev);
856 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400857 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300858 int ret;
859
860 ret = ata_host_suspend(host, PMSG_SUSPEND);
861 if (!ret) {
862 /* disable interrupts */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400863 iowrite32(0, base + ATAPI_INT_ENABLE_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300864 /* mask */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400865 iowrite32(0x7ff, base + SATAINTMASK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300866
867 clk_disable(priv->clk);
868 }
869
870 return ret;
871}
872
873static int sata_rcar_resume(struct device *dev)
874{
875 struct ata_host *host = dev_get_drvdata(dev);
876 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400877 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300878
879 clk_enable(priv->clk);
880
881 /* ack and mask */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400882 iowrite32(0, base + SATAINTSTAT_REG);
883 iowrite32(0x7ff, base + SATAINTMASK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300884 /* enable interrupts */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400885 iowrite32(ATAPI_INT_ENABLE_SATAINT, base + ATAPI_INT_ENABLE_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300886
887 ata_host_resume(host);
888
889 return 0;
890}
891
892static const struct dev_pm_ops sata_rcar_pm_ops = {
893 .suspend = sata_rcar_suspend,
894 .resume = sata_rcar_resume,
895};
896#endif
897
898static struct of_device_id sata_rcar_match[] = {
899 { .compatible = "renesas,rcar-sata", },
900 {},
901};
902MODULE_DEVICE_TABLE(of, sata_rcar_match);
903
904static struct platform_driver sata_rcar_driver = {
905 .probe = sata_rcar_probe,
906 .remove = sata_rcar_remove,
907 .driver = {
908 .name = DRV_NAME,
909 .owner = THIS_MODULE,
910 .of_match_table = sata_rcar_match,
911#ifdef CONFIG_PM
912 .pm = &sata_rcar_pm_ops,
913#endif
914 },
915};
916
917module_platform_driver(sata_rcar_driver);
918
919MODULE_LICENSE("GPL");
920MODULE_AUTHOR("Vladimir Barinov");
921MODULE_DESCRIPTION("Renesas R-Car SATA controller low level driver");