blob: 590ebea996017c13409db10df89b7175ede06f98 [file] [log] [blame]
Kuninori Morimotobb39ba62018-11-08 06:34:34 +00001// SPDX-License-Identifier: GPL-2.0+
Vladimir Barinov163cf81d2013-02-20 23:10:29 +03002/*
3 * Renesas R-Car SATA driver
4 *
5 * Author: Vladimir Barinov <source@cogentembedded.com>
Mikhail Ulyanov5bc27ef2015-01-17 02:00:36 +03006 * Copyright (C) 2013-2015 Cogent Embedded, Inc.
7 * Copyright (C) 2013-2015 Renesas Solutions Corp.
Vladimir Barinov163cf81d2013-02-20 23:10:29 +03008 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/ata.h>
13#include <linux/libata.h>
Valentine Barshake67adb42013-11-08 16:09:29 +040014#include <linux/of_device.h>
Vladimir Barinov163cf81d2013-02-20 23:10:29 +030015#include <linux/platform_device.h>
Geert Uytterhoeven1ecd34d2018-07-20 14:27:39 +020016#include <linux/pm_runtime.h>
Sachin Kamat2de1d5e2013-04-04 14:56:36 +053017#include <linux/err.h>
Vladimir Barinov163cf81d2013-02-20 23:10:29 +030018
19#define DRV_NAME "sata_rcar"
20
Vladimir Barinov163cf81d2013-02-20 23:10:29 +030021/* SH-Navi2G/ATAPI module compatible control registers */
22#define ATAPI_CONTROL1_REG 0x180
23#define ATAPI_STATUS_REG 0x184
24#define ATAPI_INT_ENABLE_REG 0x188
25#define ATAPI_DTB_ADR_REG 0x198
26#define ATAPI_DMA_START_ADR_REG 0x19C
27#define ATAPI_DMA_TRANS_CNT_REG 0x1A0
28#define ATAPI_CONTROL2_REG 0x1A4
29#define ATAPI_SIG_ST_REG 0x1B0
30#define ATAPI_BYTE_SWAP_REG 0x1BC
31
32/* ATAPI control 1 register (ATAPI_CONTROL1) bits */
33#define ATAPI_CONTROL1_ISM BIT(16)
34#define ATAPI_CONTROL1_DTA32M BIT(11)
35#define ATAPI_CONTROL1_RESET BIT(7)
36#define ATAPI_CONTROL1_DESE BIT(3)
37#define ATAPI_CONTROL1_RW BIT(2)
38#define ATAPI_CONTROL1_STOP BIT(1)
39#define ATAPI_CONTROL1_START BIT(0)
40
41/* ATAPI status register (ATAPI_STATUS) bits */
42#define ATAPI_STATUS_SATAINT BIT(11)
43#define ATAPI_STATUS_DNEND BIT(6)
44#define ATAPI_STATUS_DEVTRM BIT(5)
45#define ATAPI_STATUS_DEVINT BIT(4)
46#define ATAPI_STATUS_ERR BIT(2)
47#define ATAPI_STATUS_NEND BIT(1)
48#define ATAPI_STATUS_ACT BIT(0)
49
50/* Interrupt enable register (ATAPI_INT_ENABLE) bits */
51#define ATAPI_INT_ENABLE_SATAINT BIT(11)
52#define ATAPI_INT_ENABLE_DNEND BIT(6)
53#define ATAPI_INT_ENABLE_DEVTRM BIT(5)
54#define ATAPI_INT_ENABLE_DEVINT BIT(4)
55#define ATAPI_INT_ENABLE_ERR BIT(2)
56#define ATAPI_INT_ENABLE_NEND BIT(1)
57#define ATAPI_INT_ENABLE_ACT BIT(0)
58
59/* Access control registers for physical layer control register */
60#define SATAPHYADDR_REG 0x200
61#define SATAPHYWDATA_REG 0x204
62#define SATAPHYACCEN_REG 0x208
63#define SATAPHYRESET_REG 0x20C
64#define SATAPHYRDATA_REG 0x210
65#define SATAPHYACK_REG 0x214
66
67/* Physical layer control address command register (SATAPHYADDR) bits */
68#define SATAPHYADDR_PHYRATEMODE BIT(10)
69#define SATAPHYADDR_PHYCMD_READ BIT(9)
70#define SATAPHYADDR_PHYCMD_WRITE BIT(8)
71
72/* Physical layer control enable register (SATAPHYACCEN) bits */
73#define SATAPHYACCEN_PHYLANE BIT(0)
74
75/* Physical layer control reset register (SATAPHYRESET) bits */
76#define SATAPHYRESET_PHYRST BIT(1)
77#define SATAPHYRESET_PHYSRES BIT(0)
78
79/* Physical layer control acknowledge register (SATAPHYACK) bits */
80#define SATAPHYACK_PHYACK BIT(0)
81
82/* Serial-ATA HOST control registers */
83#define BISTCONF_REG 0x102C
84#define SDATA_REG 0x1100
85#define SSDEVCON_REG 0x1204
86
87#define SCRSSTS_REG 0x1400
88#define SCRSERR_REG 0x1404
89#define SCRSCON_REG 0x1408
90#define SCRSACT_REG 0x140C
91
92#define SATAINTSTAT_REG 0x1508
93#define SATAINTMASK_REG 0x150C
94
95/* SATA INT status register (SATAINTSTAT) bits */
96#define SATAINTSTAT_SERR BIT(3)
97#define SATAINTSTAT_ATA BIT(0)
98
99/* SATA INT mask register (SATAINTSTAT) bits */
100#define SATAINTMASK_SERRMSK BIT(3)
101#define SATAINTMASK_ERRMSK BIT(2)
102#define SATAINTMASK_ERRCRTMSK BIT(1)
103#define SATAINTMASK_ATAMSK BIT(0)
Wolfram Sange2076102018-08-06 12:40:05 +0200104#define SATAINTMASK_ALL_GEN1 0x7ff
105#define SATAINTMASK_ALL_GEN2 0xfff
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300106
107#define SATA_RCAR_INT_MASK (SATAINTMASK_SERRMSK | \
108 SATAINTMASK_ATAMSK)
109
110/* Physical Layer Control Registers */
111#define SATAPCTLR1_REG 0x43
112#define SATAPCTLR2_REG 0x52
113#define SATAPCTLR3_REG 0x5A
114#define SATAPCTLR4_REG 0x60
115
116/* Descriptor table word 0 bit (when DTA32M = 1) */
117#define SATA_RCAR_DTEND BIT(0)
118
Geert Uytterhoevendf9c5902020-09-17 15:09:20 +0200119#define SATA_RCAR_DMA_BOUNDARY 0x1FFFFFFFUL
Sergei Shtylyov8bfbeed2013-05-28 02:45:08 +0400120
Valentine Barshake67adb42013-11-08 16:09:29 +0400121/* Gen2 Physical Layer Control Registers */
122#define RCAR_GEN2_PHY_CTL1_REG 0x1704
123#define RCAR_GEN2_PHY_CTL1 0x34180002
124#define RCAR_GEN2_PHY_CTL1_SS 0xC180 /* Spread Spectrum */
125
126#define RCAR_GEN2_PHY_CTL2_REG 0x170C
127#define RCAR_GEN2_PHY_CTL2 0x00002303
128
129#define RCAR_GEN2_PHY_CTL3_REG 0x171C
130#define RCAR_GEN2_PHY_CTL3 0x000B0194
131
132#define RCAR_GEN2_PHY_CTL4_REG 0x1724
133#define RCAR_GEN2_PHY_CTL4 0x00030994
134
135#define RCAR_GEN2_PHY_CTL5_REG 0x1740
136#define RCAR_GEN2_PHY_CTL5 0x03004001
137#define RCAR_GEN2_PHY_CTL5_DC BIT(1) /* DC connection */
138#define RCAR_GEN2_PHY_CTL5_TR BIT(2) /* Termination Resistor */
139
140enum sata_rcar_type {
141 RCAR_GEN1_SATA,
142 RCAR_GEN2_SATA,
Khiem Nguyenda77d762018-02-05 04:18:51 +0900143 RCAR_GEN3_SATA,
Simon Hormanaa1cf252014-10-27 09:14:30 +0900144 RCAR_R8A7790_ES1_SATA,
Valentine Barshake67adb42013-11-08 16:09:29 +0400145};
146
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300147struct sata_rcar_priv {
148 void __iomem *base;
Wolfram Sange2076102018-08-06 12:40:05 +0200149 u32 sataint_mask;
Valentine Barshake67adb42013-11-08 16:09:29 +0400150 enum sata_rcar_type type;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300151};
152
Valentine Barshake67adb42013-11-08 16:09:29 +0400153static void sata_rcar_gen1_phy_preinit(struct sata_rcar_priv *priv)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300154{
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400155 void __iomem *base = priv->base;
156
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300157 /* idle state */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400158 iowrite32(0, base + SATAPHYADDR_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300159 /* reset */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400160 iowrite32(SATAPHYRESET_PHYRST, base + SATAPHYRESET_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300161 udelay(10);
162 /* deassert reset */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400163 iowrite32(0, base + SATAPHYRESET_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300164}
165
Valentine Barshake67adb42013-11-08 16:09:29 +0400166static void sata_rcar_gen1_phy_write(struct sata_rcar_priv *priv, u16 reg,
167 u32 val, int group)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300168{
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400169 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300170 int timeout;
171
172 /* deassert reset */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400173 iowrite32(0, base + SATAPHYRESET_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300174 /* lane 1 */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400175 iowrite32(SATAPHYACCEN_PHYLANE, base + SATAPHYACCEN_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300176 /* write phy register value */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400177 iowrite32(val, base + SATAPHYWDATA_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300178 /* set register group */
179 if (group)
180 reg |= SATAPHYADDR_PHYRATEMODE;
181 /* write command */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400182 iowrite32(SATAPHYADDR_PHYCMD_WRITE | reg, base + SATAPHYADDR_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300183 /* wait for ack */
184 for (timeout = 0; timeout < 100; timeout++) {
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400185 val = ioread32(base + SATAPHYACK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300186 if (val & SATAPHYACK_PHYACK)
187 break;
188 }
189 if (timeout >= 100)
190 pr_err("%s timeout\n", __func__);
191 /* idle state */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400192 iowrite32(0, base + SATAPHYADDR_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300193}
194
Valentine Barshake67adb42013-11-08 16:09:29 +0400195static void sata_rcar_gen1_phy_init(struct sata_rcar_priv *priv)
196{
197 sata_rcar_gen1_phy_preinit(priv);
198 sata_rcar_gen1_phy_write(priv, SATAPCTLR1_REG, 0x00200188, 0);
199 sata_rcar_gen1_phy_write(priv, SATAPCTLR1_REG, 0x00200188, 1);
200 sata_rcar_gen1_phy_write(priv, SATAPCTLR3_REG, 0x0000A061, 0);
201 sata_rcar_gen1_phy_write(priv, SATAPCTLR2_REG, 0x20000000, 0);
202 sata_rcar_gen1_phy_write(priv, SATAPCTLR2_REG, 0x20000000, 1);
203 sata_rcar_gen1_phy_write(priv, SATAPCTLR4_REG, 0x28E80000, 0);
204}
205
206static void sata_rcar_gen2_phy_init(struct sata_rcar_priv *priv)
207{
208 void __iomem *base = priv->base;
209
210 iowrite32(RCAR_GEN2_PHY_CTL1, base + RCAR_GEN2_PHY_CTL1_REG);
211 iowrite32(RCAR_GEN2_PHY_CTL2, base + RCAR_GEN2_PHY_CTL2_REG);
212 iowrite32(RCAR_GEN2_PHY_CTL3, base + RCAR_GEN2_PHY_CTL3_REG);
213 iowrite32(RCAR_GEN2_PHY_CTL4, base + RCAR_GEN2_PHY_CTL4_REG);
214 iowrite32(RCAR_GEN2_PHY_CTL5 | RCAR_GEN2_PHY_CTL5_DC |
215 RCAR_GEN2_PHY_CTL5_TR, base + RCAR_GEN2_PHY_CTL5_REG);
216}
217
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300218static void sata_rcar_freeze(struct ata_port *ap)
219{
220 struct sata_rcar_priv *priv = ap->host->private_data;
221
222 /* mask */
Wolfram Sange2076102018-08-06 12:40:05 +0200223 iowrite32(priv->sataint_mask, priv->base + SATAINTMASK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300224
225 ata_sff_freeze(ap);
226}
227
228static void sata_rcar_thaw(struct ata_port *ap)
229{
230 struct sata_rcar_priv *priv = ap->host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400231 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300232
233 /* ack */
Tejun Heo5a0a6a42013-07-02 19:54:16 -0700234 iowrite32(~(u32)SATA_RCAR_INT_MASK, base + SATAINTSTAT_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300235
236 ata_sff_thaw(ap);
237
238 /* unmask */
Wolfram Sange2076102018-08-06 12:40:05 +0200239 iowrite32(priv->sataint_mask & ~SATA_RCAR_INT_MASK, base + SATAINTMASK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300240}
241
242static void sata_rcar_ioread16_rep(void __iomem *reg, void *buffer, int count)
243{
244 u16 *ptr = buffer;
245
246 while (count--) {
247 u16 data = ioread32(reg);
248
249 *ptr++ = data;
250 }
251}
252
253static void sata_rcar_iowrite16_rep(void __iomem *reg, void *buffer, int count)
254{
255 const u16 *ptr = buffer;
256
257 while (count--)
258 iowrite32(*ptr++, reg);
259}
260
261static u8 sata_rcar_check_status(struct ata_port *ap)
262{
263 return ioread32(ap->ioaddr.status_addr);
264}
265
266static u8 sata_rcar_check_altstatus(struct ata_port *ap)
267{
268 return ioread32(ap->ioaddr.altstatus_addr);
269}
270
271static void sata_rcar_set_devctl(struct ata_port *ap, u8 ctl)
272{
273 iowrite32(ctl, ap->ioaddr.ctl_addr);
274}
275
276static void sata_rcar_dev_select(struct ata_port *ap, unsigned int device)
277{
278 iowrite32(ATA_DEVICE_OBS, ap->ioaddr.device_addr);
279 ata_sff_pause(ap); /* needed; also flushes, for mmio */
280}
281
Sergey Shtylyov88e6b812022-02-10 00:46:30 +0300282static bool sata_rcar_ata_devchk(struct ata_port *ap, unsigned int device)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300283{
284 struct ata_ioports *ioaddr = &ap->ioaddr;
285 u8 nsect, lbal;
286
287 sata_rcar_dev_select(ap, device);
288
289 iowrite32(0x55, ioaddr->nsect_addr);
290 iowrite32(0xaa, ioaddr->lbal_addr);
291
292 iowrite32(0xaa, ioaddr->nsect_addr);
293 iowrite32(0x55, ioaddr->lbal_addr);
294
295 iowrite32(0x55, ioaddr->nsect_addr);
296 iowrite32(0xaa, ioaddr->lbal_addr);
297
298 nsect = ioread32(ioaddr->nsect_addr);
299 lbal = ioread32(ioaddr->lbal_addr);
300
301 if (nsect == 0x55 && lbal == 0xaa)
Sergey Shtylyov88e6b812022-02-10 00:46:30 +0300302 return true; /* found a device */
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300303
Sergey Shtylyov88e6b812022-02-10 00:46:30 +0300304 return false; /* nothing found */
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300305}
306
307static int sata_rcar_wait_after_reset(struct ata_link *link,
308 unsigned long deadline)
309{
310 struct ata_port *ap = link->ap;
311
312 ata_msleep(ap, ATA_WAIT_AFTER_RESET);
313
314 return ata_sff_wait_ready(link, deadline);
315}
316
317static int sata_rcar_bus_softreset(struct ata_port *ap, unsigned long deadline)
318{
319 struct ata_ioports *ioaddr = &ap->ioaddr;
320
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300321 /* software reset. causes dev0 to be selected */
322 iowrite32(ap->ctl, ioaddr->ctl_addr);
323 udelay(20);
324 iowrite32(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
325 udelay(20);
326 iowrite32(ap->ctl, ioaddr->ctl_addr);
327 ap->last_ctl = ap->ctl;
328
329 /* wait the port to become ready */
330 return sata_rcar_wait_after_reset(&ap->link, deadline);
331}
332
333static int sata_rcar_softreset(struct ata_link *link, unsigned int *classes,
334 unsigned long deadline)
335{
336 struct ata_port *ap = link->ap;
337 unsigned int devmask = 0;
338 int rc;
339 u8 err;
340
341 /* determine if device 0 is present */
342 if (sata_rcar_ata_devchk(ap, 0))
343 devmask |= 1 << 0;
344
345 /* issue bus reset */
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300346 rc = sata_rcar_bus_softreset(ap, deadline);
347 /* if link is occupied, -ENODEV too is an error */
348 if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
349 ata_link_err(link, "SRST failed (errno=%d)\n", rc);
350 return rc;
351 }
352
353 /* determine by signature whether we have ATA or ATAPI devices */
354 classes[0] = ata_sff_dev_classify(&link->device[0], devmask, &err);
355
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300356 return 0;
357}
358
359static void sata_rcar_tf_load(struct ata_port *ap,
360 const struct ata_taskfile *tf)
361{
362 struct ata_ioports *ioaddr = &ap->ioaddr;
363 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
364
365 if (tf->ctl != ap->last_ctl) {
366 iowrite32(tf->ctl, ioaddr->ctl_addr);
367 ap->last_ctl = tf->ctl;
368 ata_wait_idle(ap);
369 }
370
371 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
372 iowrite32(tf->hob_feature, ioaddr->feature_addr);
373 iowrite32(tf->hob_nsect, ioaddr->nsect_addr);
374 iowrite32(tf->hob_lbal, ioaddr->lbal_addr);
375 iowrite32(tf->hob_lbam, ioaddr->lbam_addr);
376 iowrite32(tf->hob_lbah, ioaddr->lbah_addr);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300377 }
378
379 if (is_addr) {
380 iowrite32(tf->feature, ioaddr->feature_addr);
381 iowrite32(tf->nsect, ioaddr->nsect_addr);
382 iowrite32(tf->lbal, ioaddr->lbal_addr);
383 iowrite32(tf->lbam, ioaddr->lbam_addr);
384 iowrite32(tf->lbah, ioaddr->lbah_addr);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300385 }
386
Hannes Reinecke559ba182021-12-21 08:20:53 +0100387 if (tf->flags & ATA_TFLAG_DEVICE)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300388 iowrite32(tf->device, ioaddr->device_addr);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300389
390 ata_wait_idle(ap);
391}
392
393static void sata_rcar_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
394{
395 struct ata_ioports *ioaddr = &ap->ioaddr;
396
Sergey Shtylyovefcef262022-02-15 21:49:26 +0300397 tf->status = sata_rcar_check_status(ap);
398 tf->error = ioread32(ioaddr->error_addr);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300399 tf->nsect = ioread32(ioaddr->nsect_addr);
400 tf->lbal = ioread32(ioaddr->lbal_addr);
401 tf->lbam = ioread32(ioaddr->lbam_addr);
402 tf->lbah = ioread32(ioaddr->lbah_addr);
403 tf->device = ioread32(ioaddr->device_addr);
404
405 if (tf->flags & ATA_TFLAG_LBA48) {
406 iowrite32(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
407 tf->hob_feature = ioread32(ioaddr->error_addr);
408 tf->hob_nsect = ioread32(ioaddr->nsect_addr);
409 tf->hob_lbal = ioread32(ioaddr->lbal_addr);
410 tf->hob_lbam = ioread32(ioaddr->lbam_addr);
411 tf->hob_lbah = ioread32(ioaddr->lbah_addr);
412 iowrite32(tf->ctl, ioaddr->ctl_addr);
413 ap->last_ctl = tf->ctl;
414 }
415}
416
417static void sata_rcar_exec_command(struct ata_port *ap,
418 const struct ata_taskfile *tf)
419{
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300420 iowrite32(tf->command, ap->ioaddr.command_addr);
421 ata_sff_pause(ap);
422}
423
Bartlomiej Zolnierkiewicz989e0aa2016-12-30 15:01:17 +0100424static unsigned int sata_rcar_data_xfer(struct ata_queued_cmd *qc,
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300425 unsigned char *buf,
426 unsigned int buflen, int rw)
427{
Bartlomiej Zolnierkiewicz989e0aa2016-12-30 15:01:17 +0100428 struct ata_port *ap = qc->dev->link->ap;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300429 void __iomem *data_addr = ap->ioaddr.data_addr;
430 unsigned int words = buflen >> 1;
431
432 /* Transfer multiple of 2 bytes */
433 if (rw == READ)
434 sata_rcar_ioread16_rep(data_addr, buf, words);
435 else
436 sata_rcar_iowrite16_rep(data_addr, buf, words);
437
438 /* Transfer trailing byte, if any. */
439 if (unlikely(buflen & 0x01)) {
440 unsigned char pad[2] = { };
441
442 /* Point buf to the tail of buffer */
443 buf += buflen - 1;
444
445 /*
446 * Use io*16_rep() accessors here as well to avoid pointlessly
447 * swapping bytes to and from on the big endian machines...
448 */
449 if (rw == READ) {
450 sata_rcar_ioread16_rep(data_addr, pad, 1);
451 *buf = pad[0];
452 } else {
453 pad[0] = *buf;
454 sata_rcar_iowrite16_rep(data_addr, pad, 1);
455 }
456 words++;
457 }
458
459 return words << 1;
460}
461
462static void sata_rcar_drain_fifo(struct ata_queued_cmd *qc)
463{
464 int count;
465 struct ata_port *ap;
466
467 /* We only need to flush incoming data when a command was running */
468 if (qc == NULL || qc->dma_dir == DMA_TO_DEVICE)
469 return;
470
471 ap = qc->ap;
472 /* Drain up to 64K of data before we give up this recovery method */
473 for (count = 0; (ap->ops->sff_check_status(ap) & ATA_DRQ) &&
474 count < 65536; count += 2)
475 ioread32(ap->ioaddr.data_addr);
476
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300477 if (count)
478 ata_port_dbg(ap, "drained %d bytes to clear DRQ\n", count);
479}
480
481static int sata_rcar_scr_read(struct ata_link *link, unsigned int sc_reg,
482 u32 *val)
483{
484 if (sc_reg > SCR_ACTIVE)
485 return -EINVAL;
486
487 *val = ioread32(link->ap->ioaddr.scr_addr + (sc_reg << 2));
488 return 0;
489}
490
491static int sata_rcar_scr_write(struct ata_link *link, unsigned int sc_reg,
492 u32 val)
493{
494 if (sc_reg > SCR_ACTIVE)
495 return -EINVAL;
496
497 iowrite32(val, link->ap->ioaddr.scr_addr + (sc_reg << 2));
498 return 0;
499}
500
501static void sata_rcar_bmdma_fill_sg(struct ata_queued_cmd *qc)
502{
503 struct ata_port *ap = qc->ap;
504 struct ata_bmdma_prd *prd = ap->bmdma_prd;
505 struct scatterlist *sg;
Sergei Shtylyov333279c2013-05-28 02:43:23 +0400506 unsigned int si;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300507
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300508 for_each_sg(qc->sg, sg, qc->n_elem, si) {
Sergei Shtylyov333279c2013-05-28 02:43:23 +0400509 u32 addr, sg_len;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300510
511 /*
512 * Note: h/w doesn't support 64-bit, so we unconditionally
513 * truncate dma_addr_t to u32.
514 */
515 addr = (u32)sg_dma_address(sg);
516 sg_len = sg_dma_len(sg);
517
Sergei Shtylyov333279c2013-05-28 02:43:23 +0400518 prd[si].addr = cpu_to_le32(addr);
519 prd[si].flags_len = cpu_to_le32(sg_len);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300520 }
521
522 /* end-of-table flag */
Sergei Shtylyov333279c2013-05-28 02:43:23 +0400523 prd[si - 1].addr |= cpu_to_le32(SATA_RCAR_DTEND);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300524}
525
Jiri Slaby95364f32019-10-31 10:59:45 +0100526static enum ata_completion_errors sata_rcar_qc_prep(struct ata_queued_cmd *qc)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300527{
528 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
Jiri Slaby95364f32019-10-31 10:59:45 +0100529 return AC_ERR_OK;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300530
531 sata_rcar_bmdma_fill_sg(qc);
Jiri Slaby95364f32019-10-31 10:59:45 +0100532
533 return AC_ERR_OK;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300534}
535
536static void sata_rcar_bmdma_setup(struct ata_queued_cmd *qc)
537{
538 struct ata_port *ap = qc->ap;
539 unsigned int rw = qc->tf.flags & ATA_TFLAG_WRITE;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300540 struct sata_rcar_priv *priv = ap->host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400541 void __iomem *base = priv->base;
542 u32 dmactl;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300543
544 /* load PRD table addr. */
545 mb(); /* make sure PRD table writes are visible to controller */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400546 iowrite32(ap->bmdma_prd_dma, base + ATAPI_DTB_ADR_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300547
548 /* specify data direction, triple-check start bit is clear */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400549 dmactl = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300550 dmactl &= ~(ATAPI_CONTROL1_RW | ATAPI_CONTROL1_STOP);
551 if (dmactl & ATAPI_CONTROL1_START) {
552 dmactl &= ~ATAPI_CONTROL1_START;
553 dmactl |= ATAPI_CONTROL1_STOP;
554 }
555 if (!rw)
556 dmactl |= ATAPI_CONTROL1_RW;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400557 iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300558
559 /* issue r/w command */
560 ap->ops->sff_exec_command(ap, &qc->tf);
561}
562
563static void sata_rcar_bmdma_start(struct ata_queued_cmd *qc)
564{
565 struct ata_port *ap = qc->ap;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300566 struct sata_rcar_priv *priv = ap->host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400567 void __iomem *base = priv->base;
568 u32 dmactl;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300569
570 /* start host DMA transaction */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400571 dmactl = ioread32(base + ATAPI_CONTROL1_REG);
Sergei Shtylyovdf7e1312013-05-21 23:07:54 +0400572 dmactl &= ~ATAPI_CONTROL1_STOP;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300573 dmactl |= ATAPI_CONTROL1_START;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400574 iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300575}
576
577static void sata_rcar_bmdma_stop(struct ata_queued_cmd *qc)
578{
579 struct ata_port *ap = qc->ap;
580 struct sata_rcar_priv *priv = ap->host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400581 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300582 u32 dmactl;
583
584 /* force termination of DMA transfer if active */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400585 dmactl = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300586 if (dmactl & ATAPI_CONTROL1_START) {
587 dmactl &= ~ATAPI_CONTROL1_START;
588 dmactl |= ATAPI_CONTROL1_STOP;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400589 iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300590 }
591
592 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
593 ata_sff_dma_pause(ap);
594}
595
596static u8 sata_rcar_bmdma_status(struct ata_port *ap)
597{
598 struct sata_rcar_priv *priv = ap->host->private_data;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300599 u8 host_stat = 0;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400600 u32 status;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300601
602 status = ioread32(priv->base + ATAPI_STATUS_REG);
603 if (status & ATAPI_STATUS_DEVINT)
604 host_stat |= ATA_DMA_INTR;
605 if (status & ATAPI_STATUS_ACT)
606 host_stat |= ATA_DMA_ACTIVE;
607
608 return host_stat;
609}
610
611static struct scsi_host_template sata_rcar_sht = {
Sergei Shtylyov8bfbeed2013-05-28 02:45:08 +0400612 ATA_BASE_SHT(DRV_NAME),
613 /*
614 * This controller allows transfer chunks up to 512MB which cross 64KB
615 * boundaries, therefore the DMA limits are more relaxed than standard
616 * ATA SFF.
617 */
618 .sg_tablesize = ATA_MAX_PRD,
619 .dma_boundary = SATA_RCAR_DMA_BOUNDARY,
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300620};
621
622static struct ata_port_operations sata_rcar_port_ops = {
623 .inherits = &ata_bmdma_port_ops,
624
625 .freeze = sata_rcar_freeze,
626 .thaw = sata_rcar_thaw,
627 .softreset = sata_rcar_softreset,
628
629 .scr_read = sata_rcar_scr_read,
630 .scr_write = sata_rcar_scr_write,
631
632 .sff_dev_select = sata_rcar_dev_select,
633 .sff_set_devctl = sata_rcar_set_devctl,
634 .sff_check_status = sata_rcar_check_status,
635 .sff_check_altstatus = sata_rcar_check_altstatus,
636 .sff_tf_load = sata_rcar_tf_load,
637 .sff_tf_read = sata_rcar_tf_read,
638 .sff_exec_command = sata_rcar_exec_command,
639 .sff_data_xfer = sata_rcar_data_xfer,
640 .sff_drain_fifo = sata_rcar_drain_fifo,
641
642 .qc_prep = sata_rcar_qc_prep,
643
644 .bmdma_setup = sata_rcar_bmdma_setup,
645 .bmdma_start = sata_rcar_bmdma_start,
646 .bmdma_stop = sata_rcar_bmdma_stop,
647 .bmdma_status = sata_rcar_bmdma_status,
648};
649
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400650static void sata_rcar_serr_interrupt(struct ata_port *ap)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300651{
652 struct sata_rcar_priv *priv = ap->host->private_data;
653 struct ata_eh_info *ehi = &ap->link.eh_info;
654 int freeze = 0;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300655 u32 serror;
656
657 serror = ioread32(priv->base + SCRSERR_REG);
658 if (!serror)
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400659 return;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300660
Hannes Reineckefa538d42021-12-21 08:20:43 +0100661 ata_port_dbg(ap, "SError @host_intr: 0x%x\n", serror);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300662
663 /* first, analyze and record host port events */
664 ata_ehi_clear_desc(ehi);
665
666 if (serror & (SERR_DEV_XCHG | SERR_PHYRDY_CHG)) {
667 /* Setup a soft-reset EH action */
668 ata_ehi_hotplugged(ehi);
669 ata_ehi_push_desc(ehi, "%s", "hotplug");
670
671 freeze = serror & SERR_COMM_WAKE ? 0 : 1;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300672 }
673
674 /* freeze or abort */
675 if (freeze)
676 ata_port_freeze(ap);
677 else
678 ata_port_abort(ap);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300679}
680
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400681static void sata_rcar_ata_interrupt(struct ata_port *ap)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300682{
683 struct ata_queued_cmd *qc;
684 int handled = 0;
685
686 qc = ata_qc_from_tag(ap, ap->link.active_tag);
687 if (qc)
688 handled |= ata_bmdma_port_intr(ap, qc);
689
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400690 /* be sure to clear ATA interrupt */
691 if (!handled)
692 sata_rcar_check_status(ap);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300693}
694
695static irqreturn_t sata_rcar_interrupt(int irq, void *dev_instance)
696{
697 struct ata_host *host = dev_instance;
698 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400699 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300700 unsigned int handled = 0;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400701 struct ata_port *ap;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300702 u32 sataintstat;
703 unsigned long flags;
704
705 spin_lock_irqsave(&host->lock, flags);
706
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400707 sataintstat = ioread32(base + SATAINTSTAT_REG);
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400708 sataintstat &= SATA_RCAR_INT_MASK;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300709 if (!sataintstat)
710 goto done;
711 /* ack */
Wolfram Sange2076102018-08-06 12:40:05 +0200712 iowrite32(~sataintstat & priv->sataint_mask, base + SATAINTSTAT_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300713
714 ap = host->ports[0];
715
716 if (sataintstat & SATAINTSTAT_ATA)
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400717 sata_rcar_ata_interrupt(ap);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300718
719 if (sataintstat & SATAINTSTAT_SERR)
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400720 sata_rcar_serr_interrupt(ap);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300721
Sergei Shtylyov52a2a102013-06-01 02:38:35 +0400722 handled = 1;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300723done:
724 spin_unlock_irqrestore(&host->lock, flags);
725
726 return IRQ_RETVAL(handled);
727}
728
729static void sata_rcar_setup_port(struct ata_host *host)
730{
731 struct ata_port *ap = host->ports[0];
732 struct ata_ioports *ioaddr = &ap->ioaddr;
733 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400734 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300735
736 ap->ops = &sata_rcar_port_ops;
737 ap->pio_mask = ATA_PIO4;
738 ap->udma_mask = ATA_UDMA6;
739 ap->flags |= ATA_FLAG_SATA;
740
Simon Hormanaa1cf252014-10-27 09:14:30 +0900741 if (priv->type == RCAR_R8A7790_ES1_SATA)
742 ap->flags |= ATA_FLAG_NO_DIPM;
743
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400744 ioaddr->cmd_addr = base + SDATA_REG;
745 ioaddr->ctl_addr = base + SSDEVCON_REG;
746 ioaddr->scr_addr = base + SCRSSTS_REG;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300747 ioaddr->altstatus_addr = ioaddr->ctl_addr;
748
749 ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << 2);
750 ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << 2);
751 ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << 2);
752 ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << 2);
753 ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << 2);
754 ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << 2);
755 ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << 2);
756 ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << 2);
757 ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << 2);
758 ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << 2);
759}
760
Khiem Nguyenda77d762018-02-05 04:18:51 +0900761static void sata_rcar_init_module(struct sata_rcar_priv *priv)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300762{
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400763 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300764 u32 val;
765
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300766 /* SATA-IP reset state */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400767 val = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300768 val |= ATAPI_CONTROL1_RESET;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400769 iowrite32(val, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300770
771 /* ISM mode, PRD mode, DTEND flag at bit 0 */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400772 val = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300773 val |= ATAPI_CONTROL1_ISM;
774 val |= ATAPI_CONTROL1_DESE;
775 val |= ATAPI_CONTROL1_DTA32M;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400776 iowrite32(val, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300777
778 /* Release the SATA-IP from the reset state */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400779 val = ioread32(base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300780 val &= ~ATAPI_CONTROL1_RESET;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400781 iowrite32(val, base + ATAPI_CONTROL1_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300782
783 /* ack and mask */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400784 iowrite32(0, base + SATAINTSTAT_REG);
Wolfram Sange2076102018-08-06 12:40:05 +0200785 iowrite32(priv->sataint_mask, base + SATAINTMASK_REG);
Khiem Nguyenda77d762018-02-05 04:18:51 +0900786
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300787 /* enable interrupts */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400788 iowrite32(ATAPI_INT_ENABLE_SATAINT, base + ATAPI_INT_ENABLE_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300789}
790
Khiem Nguyenda77d762018-02-05 04:18:51 +0900791static void sata_rcar_init_controller(struct ata_host *host)
792{
793 struct sata_rcar_priv *priv = host->private_data;
Khiem Nguyenda77d762018-02-05 04:18:51 +0900794
Wolfram Sange2076102018-08-06 12:40:05 +0200795 priv->sataint_mask = SATAINTMASK_ALL_GEN2;
796
Khiem Nguyenda77d762018-02-05 04:18:51 +0900797 /* reset and setup phy */
798 switch (priv->type) {
799 case RCAR_GEN1_SATA:
Wolfram Sange2076102018-08-06 12:40:05 +0200800 priv->sataint_mask = SATAINTMASK_ALL_GEN1;
Khiem Nguyenda77d762018-02-05 04:18:51 +0900801 sata_rcar_gen1_phy_init(priv);
802 break;
803 case RCAR_GEN2_SATA:
Khiem Nguyenda77d762018-02-05 04:18:51 +0900804 case RCAR_R8A7790_ES1_SATA:
805 sata_rcar_gen2_phy_init(priv);
806 break;
Masaharu Hayakawa96b95482018-08-06 12:42:00 +0200807 case RCAR_GEN3_SATA:
808 break;
Khiem Nguyenda77d762018-02-05 04:18:51 +0900809 default:
810 dev_warn(host->dev, "SATA phy is not initialized\n");
811 break;
812 }
813
814 sata_rcar_init_module(priv);
815}
816
Arvind Yadava5893872017-06-16 17:32:21 +0530817static const struct of_device_id sata_rcar_match[] = {
Valentine Barshake67adb42013-11-08 16:09:29 +0400818 {
819 /* Deprecated by "renesas,sata-r8a7779" */
820 .compatible = "renesas,rcar-sata",
821 .data = (void *)RCAR_GEN1_SATA,
822 },
823 {
824 .compatible = "renesas,sata-r8a7779",
825 .data = (void *)RCAR_GEN1_SATA,
826 },
827 {
828 .compatible = "renesas,sata-r8a7790",
829 .data = (void *)RCAR_GEN2_SATA
830 },
831 {
Simon Hormanaa1cf252014-10-27 09:14:30 +0900832 .compatible = "renesas,sata-r8a7790-es1",
833 .data = (void *)RCAR_R8A7790_ES1_SATA
834 },
835 {
Valentine Barshake67adb42013-11-08 16:09:29 +0400836 .compatible = "renesas,sata-r8a7791",
837 .data = (void *)RCAR_GEN2_SATA
838 },
Koji Matsuokae35b9882014-10-28 12:45:32 +0900839 {
840 .compatible = "renesas,sata-r8a7793",
841 .data = (void *)RCAR_GEN2_SATA
842 },
Kouei Abefec7bc42015-11-20 21:33:02 +0900843 {
844 .compatible = "renesas,sata-r8a7795",
Khiem Nguyenda77d762018-02-05 04:18:51 +0900845 .data = (void *)RCAR_GEN3_SATA
Kouei Abefec7bc42015-11-20 21:33:02 +0900846 },
Simon Horman6ac1d152017-07-11 13:44:20 +0200847 {
848 .compatible = "renesas,rcar-gen2-sata",
849 .data = (void *)RCAR_GEN2_SATA
850 },
851 {
852 .compatible = "renesas,rcar-gen3-sata",
Khiem Nguyenda77d762018-02-05 04:18:51 +0900853 .data = (void *)RCAR_GEN3_SATA
Simon Horman6ac1d152017-07-11 13:44:20 +0200854 },
Geert Uytterhoeven5e776d72022-03-03 09:36:35 +0100855 { /* sentinel */ }
Valentine Barshake67adb42013-11-08 16:09:29 +0400856};
857MODULE_DEVICE_TABLE(of, sata_rcar_match);
858
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300859static int sata_rcar_probe(struct platform_device *pdev)
860{
Geert Uytterhoevenc01e2292018-07-20 14:27:38 +0200861 struct device *dev = &pdev->dev;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300862 struct ata_host *host;
863 struct sata_rcar_priv *priv;
864 struct resource *mem;
865 int irq;
866 int ret = 0;
867
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300868 irq = platform_get_irq(pdev, 0);
Sergei Shtylyov9f83cfd2018-11-24 21:14:16 +0300869 if (irq < 0)
870 return irq;
871 if (!irq)
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300872 return -EINVAL;
873
Geert Uytterhoevenc01e2292018-07-20 14:27:38 +0200874 priv = devm_kzalloc(dev, sizeof(struct sata_rcar_priv), GFP_KERNEL);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300875 if (!priv)
876 return -ENOMEM;
877
Geert Uytterhoevenc01e2292018-07-20 14:27:38 +0200878 priv->type = (enum sata_rcar_type)of_device_get_match_data(dev);
Arvind Yadav5dc63fd2017-05-09 16:00:28 +0530879
Geert Uytterhoeven1ecd34d2018-07-20 14:27:39 +0200880 pm_runtime_enable(dev);
881 ret = pm_runtime_get_sync(dev);
882 if (ret < 0)
Navid Emamdoosteea12382020-06-04 22:06:43 -0500883 goto err_pm_put;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300884
Geert Uytterhoevenc01e2292018-07-20 14:27:38 +0200885 host = ata_host_alloc(dev, 1);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300886 if (!host) {
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300887 ret = -ENOMEM;
Geert Uytterhoeven1ecd34d2018-07-20 14:27:39 +0200888 goto err_pm_put;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300889 }
890
891 host->private_data = priv;
892
Julia Lawall4a9b7f92013-08-14 11:11:31 +0200893 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
Geert Uytterhoevenc01e2292018-07-20 14:27:38 +0200894 priv->base = devm_ioremap_resource(dev, mem);
Sachin Kamat2de1d5e2013-04-04 14:56:36 +0530895 if (IS_ERR(priv->base)) {
896 ret = PTR_ERR(priv->base);
Geert Uytterhoeven1ecd34d2018-07-20 14:27:39 +0200897 goto err_pm_put;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300898 }
899
900 /* setup port */
901 sata_rcar_setup_port(host);
902
903 /* initialize host controller */
904 sata_rcar_init_controller(host);
905
906 ret = ata_host_activate(host, irq, sata_rcar_interrupt, 0,
907 &sata_rcar_sht);
908 if (!ret)
909 return 0;
910
Geert Uytterhoeven1ecd34d2018-07-20 14:27:39 +0200911err_pm_put:
912 pm_runtime_put(dev);
Geert Uytterhoeven1ecd34d2018-07-20 14:27:39 +0200913 pm_runtime_disable(dev);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300914 return ret;
915}
916
917static int sata_rcar_remove(struct platform_device *pdev)
918{
Jingoo Hand89995d2013-05-23 19:41:21 +0900919 struct ata_host *host = platform_get_drvdata(pdev);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300920 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400921 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300922
923 ata_host_detach(host);
924
925 /* disable interrupts */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400926 iowrite32(0, base + ATAPI_INT_ENABLE_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300927 /* ack and mask */
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400928 iowrite32(0, base + SATAINTSTAT_REG);
Wolfram Sange2076102018-08-06 12:40:05 +0200929 iowrite32(priv->sataint_mask, base + SATAINTMASK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300930
Geert Uytterhoeven1ecd34d2018-07-20 14:27:39 +0200931 pm_runtime_put(&pdev->dev);
932 pm_runtime_disable(&pdev->dev);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300933
934 return 0;
935}
936
Bartlomiej Zolnierkiewicz58eb8cd2014-05-07 17:17:44 +0200937#ifdef CONFIG_PM_SLEEP
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300938static int sata_rcar_suspend(struct device *dev)
939{
940 struct ata_host *host = dev_get_drvdata(dev);
941 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400942 void __iomem *base = priv->base;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300943
Sergey Shtylyovec87cf32022-02-02 23:58:21 +0300944 ata_host_suspend(host, PMSG_SUSPEND);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300945
Sergey Shtylyovec87cf32022-02-02 23:58:21 +0300946 /* disable interrupts */
947 iowrite32(0, base + ATAPI_INT_ENABLE_REG);
948 /* mask */
949 iowrite32(priv->sataint_mask, base + SATAINTMASK_REG);
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300950
Sergey Shtylyovec87cf32022-02-02 23:58:21 +0300951 pm_runtime_put(dev);
952
953 return 0;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300954}
955
956static int sata_rcar_resume(struct device *dev)
957{
958 struct ata_host *host = dev_get_drvdata(dev);
959 struct sata_rcar_priv *priv = host->private_data;
Sergei Shtylyov1b20f6a2013-05-28 02:46:41 +0400960 void __iomem *base = priv->base;
Arvind Yadav5dc63fd2017-05-09 16:00:28 +0530961 int ret;
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300962
Geert Uytterhoeven1ecd34d2018-07-20 14:27:39 +0200963 ret = pm_runtime_get_sync(dev);
Navid Emamdoosteea12382020-06-04 22:06:43 -0500964 if (ret < 0) {
965 pm_runtime_put(dev);
Arvind Yadav5dc63fd2017-05-09 16:00:28 +0530966 return ret;
Navid Emamdoosteea12382020-06-04 22:06:43 -0500967 }
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300968
Khiem Nguyenda77d762018-02-05 04:18:51 +0900969 if (priv->type == RCAR_GEN3_SATA) {
Khiem Nguyenda77d762018-02-05 04:18:51 +0900970 sata_rcar_init_module(priv);
971 } else {
972 /* ack and mask */
973 iowrite32(0, base + SATAINTSTAT_REG);
Wolfram Sange2076102018-08-06 12:40:05 +0200974 iowrite32(priv->sataint_mask, base + SATAINTMASK_REG);
Khiem Nguyenda77d762018-02-05 04:18:51 +0900975
976 /* enable interrupts */
977 iowrite32(ATAPI_INT_ENABLE_SATAINT,
978 base + ATAPI_INT_ENABLE_REG);
979 }
Vladimir Barinov163cf81d2013-02-20 23:10:29 +0300980
981 ata_host_resume(host);
982
983 return 0;
984}
985
Mikhail Ulyanov5bc27ef2015-01-17 02:00:36 +0300986static int sata_rcar_restore(struct device *dev)
987{
988 struct ata_host *host = dev_get_drvdata(dev);
Arvind Yadav5dc63fd2017-05-09 16:00:28 +0530989 int ret;
Mikhail Ulyanov5bc27ef2015-01-17 02:00:36 +0300990
Geert Uytterhoeven1ecd34d2018-07-20 14:27:39 +0200991 ret = pm_runtime_get_sync(dev);
Navid Emamdoosteea12382020-06-04 22:06:43 -0500992 if (ret < 0) {
993 pm_runtime_put(dev);
Arvind Yadav5dc63fd2017-05-09 16:00:28 +0530994 return ret;
Navid Emamdoosteea12382020-06-04 22:06:43 -0500995 }
Mikhail Ulyanov5bc27ef2015-01-17 02:00:36 +0300996
997 sata_rcar_setup_port(host);
998
999 /* initialize host controller */
1000 sata_rcar_init_controller(host);
1001
1002 ata_host_resume(host);
1003
1004 return 0;
1005}
1006
Vladimir Barinov163cf81d2013-02-20 23:10:29 +03001007static const struct dev_pm_ops sata_rcar_pm_ops = {
1008 .suspend = sata_rcar_suspend,
1009 .resume = sata_rcar_resume,
Mikhail Ulyanov5bc27ef2015-01-17 02:00:36 +03001010 .freeze = sata_rcar_suspend,
1011 .thaw = sata_rcar_resume,
1012 .poweroff = sata_rcar_suspend,
1013 .restore = sata_rcar_restore,
Vladimir Barinov163cf81d2013-02-20 23:10:29 +03001014};
1015#endif
1016
Vladimir Barinov163cf81d2013-02-20 23:10:29 +03001017static struct platform_driver sata_rcar_driver = {
1018 .probe = sata_rcar_probe,
1019 .remove = sata_rcar_remove,
Vladimir Barinov163cf81d2013-02-20 23:10:29 +03001020 .driver = {
1021 .name = DRV_NAME,
Vladimir Barinov163cf81d2013-02-20 23:10:29 +03001022 .of_match_table = sata_rcar_match,
Bartlomiej Zolnierkiewicz58eb8cd2014-05-07 17:17:44 +02001023#ifdef CONFIG_PM_SLEEP
Vladimir Barinov163cf81d2013-02-20 23:10:29 +03001024 .pm = &sata_rcar_pm_ops,
1025#endif
1026 },
1027};
1028
1029module_platform_driver(sata_rcar_driver);
1030
1031MODULE_LICENSE("GPL");
1032MODULE_AUTHOR("Vladimir Barinov");
1033MODULE_DESCRIPTION("Renesas R-Car SATA controller low level driver");