2 * Renesas R-Car SATA driver
4 * Author: Vladimir Barinov <source@cogentembedded.com>
5 * Copyright (C) 2013 Cogent Embedded, Inc.
6 * Copyright (C) 2013 Renesas Solutions Corp.
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.
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/ata.h>
17 #include <linux/libata.h>
18 #include <linux/of_device.h>
19 #include <linux/platform_device.h>
20 #include <linux/clk.h>
21 #include <linux/err.h>
23 #define DRV_NAME "sata_rcar"
25 /* SH-Navi2G/ATAPI-ATA compatible task registers */
26 #define DATA_REG 0x100
27 #define SDEVCON_REG 0x138
29 /* SH-Navi2G/ATAPI module compatible control registers */
30 #define ATAPI_CONTROL1_REG 0x180
31 #define ATAPI_STATUS_REG 0x184
32 #define ATAPI_INT_ENABLE_REG 0x188
33 #define ATAPI_DTB_ADR_REG 0x198
34 #define ATAPI_DMA_START_ADR_REG 0x19C
35 #define ATAPI_DMA_TRANS_CNT_REG 0x1A0
36 #define ATAPI_CONTROL2_REG 0x1A4
37 #define ATAPI_SIG_ST_REG 0x1B0
38 #define ATAPI_BYTE_SWAP_REG 0x1BC
40 /* ATAPI control 1 register (ATAPI_CONTROL1) bits */
41 #define ATAPI_CONTROL1_ISM BIT(16)
42 #define ATAPI_CONTROL1_DTA32M BIT(11)
43 #define ATAPI_CONTROL1_RESET BIT(7)
44 #define ATAPI_CONTROL1_DESE BIT(3)
45 #define ATAPI_CONTROL1_RW BIT(2)
46 #define ATAPI_CONTROL1_STOP BIT(1)
47 #define ATAPI_CONTROL1_START BIT(0)
49 /* ATAPI status register (ATAPI_STATUS) bits */
50 #define ATAPI_STATUS_SATAINT BIT(11)
51 #define ATAPI_STATUS_DNEND BIT(6)
52 #define ATAPI_STATUS_DEVTRM BIT(5)
53 #define ATAPI_STATUS_DEVINT BIT(4)
54 #define ATAPI_STATUS_ERR BIT(2)
55 #define ATAPI_STATUS_NEND BIT(1)
56 #define ATAPI_STATUS_ACT BIT(0)
58 /* Interrupt enable register (ATAPI_INT_ENABLE) bits */
59 #define ATAPI_INT_ENABLE_SATAINT BIT(11)
60 #define ATAPI_INT_ENABLE_DNEND BIT(6)
61 #define ATAPI_INT_ENABLE_DEVTRM BIT(5)
62 #define ATAPI_INT_ENABLE_DEVINT BIT(4)
63 #define ATAPI_INT_ENABLE_ERR BIT(2)
64 #define ATAPI_INT_ENABLE_NEND BIT(1)
65 #define ATAPI_INT_ENABLE_ACT BIT(0)
67 /* Access control registers for physical layer control register */
68 #define SATAPHYADDR_REG 0x200
69 #define SATAPHYWDATA_REG 0x204
70 #define SATAPHYACCEN_REG 0x208
71 #define SATAPHYRESET_REG 0x20C
72 #define SATAPHYRDATA_REG 0x210
73 #define SATAPHYACK_REG 0x214
75 /* Physical layer control address command register (SATAPHYADDR) bits */
76 #define SATAPHYADDR_PHYRATEMODE BIT(10)
77 #define SATAPHYADDR_PHYCMD_READ BIT(9)
78 #define SATAPHYADDR_PHYCMD_WRITE BIT(8)
80 /* Physical layer control enable register (SATAPHYACCEN) bits */
81 #define SATAPHYACCEN_PHYLANE BIT(0)
83 /* Physical layer control reset register (SATAPHYRESET) bits */
84 #define SATAPHYRESET_PHYRST BIT(1)
85 #define SATAPHYRESET_PHYSRES BIT(0)
87 /* Physical layer control acknowledge register (SATAPHYACK) bits */
88 #define SATAPHYACK_PHYACK BIT(0)
90 /* Serial-ATA HOST control registers */
91 #define BISTCONF_REG 0x102C
92 #define SDATA_REG 0x1100
93 #define SSDEVCON_REG 0x1204
95 #define SCRSSTS_REG 0x1400
96 #define SCRSERR_REG 0x1404
97 #define SCRSCON_REG 0x1408
98 #define SCRSACT_REG 0x140C
100 #define SATAINTSTAT_REG 0x1508
101 #define SATAINTMASK_REG 0x150C
103 /* SATA INT status register (SATAINTSTAT) bits */
104 #define SATAINTSTAT_SERR BIT(3)
105 #define SATAINTSTAT_ATA BIT(0)
107 /* SATA INT mask register (SATAINTSTAT) bits */
108 #define SATAINTMASK_SERRMSK BIT(3)
109 #define SATAINTMASK_ERRMSK BIT(2)
110 #define SATAINTMASK_ERRCRTMSK BIT(1)
111 #define SATAINTMASK_ATAMSK BIT(0)
113 #define SATA_RCAR_INT_MASK (SATAINTMASK_SERRMSK | \
116 /* Physical Layer Control Registers */
117 #define SATAPCTLR1_REG 0x43
118 #define SATAPCTLR2_REG 0x52
119 #define SATAPCTLR3_REG 0x5A
120 #define SATAPCTLR4_REG 0x60
122 /* Descriptor table word 0 bit (when DTA32M = 1) */
123 #define SATA_RCAR_DTEND BIT(0)
125 #define SATA_RCAR_DMA_BOUNDARY 0x1FFFFFFEUL
127 /* Gen2 Physical Layer Control Registers */
128 #define RCAR_GEN2_PHY_CTL1_REG 0x1704
129 #define RCAR_GEN2_PHY_CTL1 0x34180002
130 #define RCAR_GEN2_PHY_CTL1_SS 0xC180 /* Spread Spectrum */
132 #define RCAR_GEN2_PHY_CTL2_REG 0x170C
133 #define RCAR_GEN2_PHY_CTL2 0x00002303
135 #define RCAR_GEN2_PHY_CTL3_REG 0x171C
136 #define RCAR_GEN2_PHY_CTL3 0x000B0194
138 #define RCAR_GEN2_PHY_CTL4_REG 0x1724
139 #define RCAR_GEN2_PHY_CTL4 0x00030994
141 #define RCAR_GEN2_PHY_CTL5_REG 0x1740
142 #define RCAR_GEN2_PHY_CTL5 0x03004001
143 #define RCAR_GEN2_PHY_CTL5_DC BIT(1) /* DC connection */
144 #define RCAR_GEN2_PHY_CTL5_TR BIT(2) /* Termination Resistor */
146 enum sata_rcar_type {
151 struct sata_rcar_priv {
154 enum sata_rcar_type type;
157 static void sata_rcar_gen1_phy_preinit(struct sata_rcar_priv *priv)
159 void __iomem *base = priv->base;
162 iowrite32(0, base + SATAPHYADDR_REG);
164 iowrite32(SATAPHYRESET_PHYRST, base + SATAPHYRESET_REG);
167 iowrite32(0, base + SATAPHYRESET_REG);
170 static void sata_rcar_gen1_phy_write(struct sata_rcar_priv *priv, u16 reg,
173 void __iomem *base = priv->base;
177 iowrite32(0, base + SATAPHYRESET_REG);
179 iowrite32(SATAPHYACCEN_PHYLANE, base + SATAPHYACCEN_REG);
180 /* write phy register value */
181 iowrite32(val, base + SATAPHYWDATA_REG);
182 /* set register group */
184 reg |= SATAPHYADDR_PHYRATEMODE;
186 iowrite32(SATAPHYADDR_PHYCMD_WRITE | reg, base + SATAPHYADDR_REG);
188 for (timeout = 0; timeout < 100; timeout++) {
189 val = ioread32(base + SATAPHYACK_REG);
190 if (val & SATAPHYACK_PHYACK)
194 pr_err("%s timeout\n", __func__);
196 iowrite32(0, base + SATAPHYADDR_REG);
199 static void sata_rcar_gen1_phy_init(struct sata_rcar_priv *priv)
201 sata_rcar_gen1_phy_preinit(priv);
202 sata_rcar_gen1_phy_write(priv, SATAPCTLR1_REG, 0x00200188, 0);
203 sata_rcar_gen1_phy_write(priv, SATAPCTLR1_REG, 0x00200188, 1);
204 sata_rcar_gen1_phy_write(priv, SATAPCTLR3_REG, 0x0000A061, 0);
205 sata_rcar_gen1_phy_write(priv, SATAPCTLR2_REG, 0x20000000, 0);
206 sata_rcar_gen1_phy_write(priv, SATAPCTLR2_REG, 0x20000000, 1);
207 sata_rcar_gen1_phy_write(priv, SATAPCTLR4_REG, 0x28E80000, 0);
210 static void sata_rcar_gen2_phy_init(struct sata_rcar_priv *priv)
212 void __iomem *base = priv->base;
214 iowrite32(RCAR_GEN2_PHY_CTL1, base + RCAR_GEN2_PHY_CTL1_REG);
215 iowrite32(RCAR_GEN2_PHY_CTL2, base + RCAR_GEN2_PHY_CTL2_REG);
216 iowrite32(RCAR_GEN2_PHY_CTL3, base + RCAR_GEN2_PHY_CTL3_REG);
217 iowrite32(RCAR_GEN2_PHY_CTL4, base + RCAR_GEN2_PHY_CTL4_REG);
218 iowrite32(RCAR_GEN2_PHY_CTL5 | RCAR_GEN2_PHY_CTL5_DC |
219 RCAR_GEN2_PHY_CTL5_TR, base + RCAR_GEN2_PHY_CTL5_REG);
222 static void sata_rcar_freeze(struct ata_port *ap)
224 struct sata_rcar_priv *priv = ap->host->private_data;
227 iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
232 static void sata_rcar_thaw(struct ata_port *ap)
234 struct sata_rcar_priv *priv = ap->host->private_data;
235 void __iomem *base = priv->base;
238 iowrite32(~(u32)SATA_RCAR_INT_MASK, base + SATAINTSTAT_REG);
243 iowrite32(0x7ff & ~SATA_RCAR_INT_MASK, base + SATAINTMASK_REG);
246 static void sata_rcar_ioread16_rep(void __iomem *reg, void *buffer, int count)
251 u16 data = ioread32(reg);
257 static void sata_rcar_iowrite16_rep(void __iomem *reg, void *buffer, int count)
259 const u16 *ptr = buffer;
262 iowrite32(*ptr++, reg);
265 static u8 sata_rcar_check_status(struct ata_port *ap)
267 return ioread32(ap->ioaddr.status_addr);
270 static u8 sata_rcar_check_altstatus(struct ata_port *ap)
272 return ioread32(ap->ioaddr.altstatus_addr);
275 static void sata_rcar_set_devctl(struct ata_port *ap, u8 ctl)
277 iowrite32(ctl, ap->ioaddr.ctl_addr);
280 static void sata_rcar_dev_select(struct ata_port *ap, unsigned int device)
282 iowrite32(ATA_DEVICE_OBS, ap->ioaddr.device_addr);
283 ata_sff_pause(ap); /* needed; also flushes, for mmio */
286 static unsigned int sata_rcar_ata_devchk(struct ata_port *ap,
289 struct ata_ioports *ioaddr = &ap->ioaddr;
292 sata_rcar_dev_select(ap, device);
294 iowrite32(0x55, ioaddr->nsect_addr);
295 iowrite32(0xaa, ioaddr->lbal_addr);
297 iowrite32(0xaa, ioaddr->nsect_addr);
298 iowrite32(0x55, ioaddr->lbal_addr);
300 iowrite32(0x55, ioaddr->nsect_addr);
301 iowrite32(0xaa, ioaddr->lbal_addr);
303 nsect = ioread32(ioaddr->nsect_addr);
304 lbal = ioread32(ioaddr->lbal_addr);
306 if (nsect == 0x55 && lbal == 0xaa)
307 return 1; /* found a device */
309 return 0; /* nothing found */
312 static int sata_rcar_wait_after_reset(struct ata_link *link,
313 unsigned long deadline)
315 struct ata_port *ap = link->ap;
317 ata_msleep(ap, ATA_WAIT_AFTER_RESET);
319 return ata_sff_wait_ready(link, deadline);
322 static int sata_rcar_bus_softreset(struct ata_port *ap, unsigned long deadline)
324 struct ata_ioports *ioaddr = &ap->ioaddr;
326 DPRINTK("ata%u: bus reset via SRST\n", ap->print_id);
328 /* software reset. causes dev0 to be selected */
329 iowrite32(ap->ctl, ioaddr->ctl_addr);
331 iowrite32(ap->ctl | ATA_SRST, ioaddr->ctl_addr);
333 iowrite32(ap->ctl, ioaddr->ctl_addr);
334 ap->last_ctl = ap->ctl;
336 /* wait the port to become ready */
337 return sata_rcar_wait_after_reset(&ap->link, deadline);
340 static int sata_rcar_softreset(struct ata_link *link, unsigned int *classes,
341 unsigned long deadline)
343 struct ata_port *ap = link->ap;
344 unsigned int devmask = 0;
348 /* determine if device 0 is present */
349 if (sata_rcar_ata_devchk(ap, 0))
352 /* issue bus reset */
353 DPRINTK("about to softreset, devmask=%x\n", devmask);
354 rc = sata_rcar_bus_softreset(ap, deadline);
355 /* if link is occupied, -ENODEV too is an error */
356 if (rc && (rc != -ENODEV || sata_scr_valid(link))) {
357 ata_link_err(link, "SRST failed (errno=%d)\n", rc);
361 /* determine by signature whether we have ATA or ATAPI devices */
362 classes[0] = ata_sff_dev_classify(&link->device[0], devmask, &err);
364 DPRINTK("classes[0]=%u\n", classes[0]);
368 static void sata_rcar_tf_load(struct ata_port *ap,
369 const struct ata_taskfile *tf)
371 struct ata_ioports *ioaddr = &ap->ioaddr;
372 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
374 if (tf->ctl != ap->last_ctl) {
375 iowrite32(tf->ctl, ioaddr->ctl_addr);
376 ap->last_ctl = tf->ctl;
380 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
381 iowrite32(tf->hob_feature, ioaddr->feature_addr);
382 iowrite32(tf->hob_nsect, ioaddr->nsect_addr);
383 iowrite32(tf->hob_lbal, ioaddr->lbal_addr);
384 iowrite32(tf->hob_lbam, ioaddr->lbam_addr);
385 iowrite32(tf->hob_lbah, ioaddr->lbah_addr);
386 VPRINTK("hob: feat 0x%X nsect 0x%X, lba 0x%X 0x%X 0x%X\n",
395 iowrite32(tf->feature, ioaddr->feature_addr);
396 iowrite32(tf->nsect, ioaddr->nsect_addr);
397 iowrite32(tf->lbal, ioaddr->lbal_addr);
398 iowrite32(tf->lbam, ioaddr->lbam_addr);
399 iowrite32(tf->lbah, ioaddr->lbah_addr);
400 VPRINTK("feat 0x%X nsect 0x%X lba 0x%X 0x%X 0x%X\n",
408 if (tf->flags & ATA_TFLAG_DEVICE) {
409 iowrite32(tf->device, ioaddr->device_addr);
410 VPRINTK("device 0x%X\n", tf->device);
416 static void sata_rcar_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
418 struct ata_ioports *ioaddr = &ap->ioaddr;
420 tf->command = sata_rcar_check_status(ap);
421 tf->feature = ioread32(ioaddr->error_addr);
422 tf->nsect = ioread32(ioaddr->nsect_addr);
423 tf->lbal = ioread32(ioaddr->lbal_addr);
424 tf->lbam = ioread32(ioaddr->lbam_addr);
425 tf->lbah = ioread32(ioaddr->lbah_addr);
426 tf->device = ioread32(ioaddr->device_addr);
428 if (tf->flags & ATA_TFLAG_LBA48) {
429 iowrite32(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
430 tf->hob_feature = ioread32(ioaddr->error_addr);
431 tf->hob_nsect = ioread32(ioaddr->nsect_addr);
432 tf->hob_lbal = ioread32(ioaddr->lbal_addr);
433 tf->hob_lbam = ioread32(ioaddr->lbam_addr);
434 tf->hob_lbah = ioread32(ioaddr->lbah_addr);
435 iowrite32(tf->ctl, ioaddr->ctl_addr);
436 ap->last_ctl = tf->ctl;
440 static void sata_rcar_exec_command(struct ata_port *ap,
441 const struct ata_taskfile *tf)
443 DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
445 iowrite32(tf->command, ap->ioaddr.command_addr);
449 static unsigned int sata_rcar_data_xfer(struct ata_device *dev,
451 unsigned int buflen, int rw)
453 struct ata_port *ap = dev->link->ap;
454 void __iomem *data_addr = ap->ioaddr.data_addr;
455 unsigned int words = buflen >> 1;
457 /* Transfer multiple of 2 bytes */
459 sata_rcar_ioread16_rep(data_addr, buf, words);
461 sata_rcar_iowrite16_rep(data_addr, buf, words);
463 /* Transfer trailing byte, if any. */
464 if (unlikely(buflen & 0x01)) {
465 unsigned char pad[2] = { };
467 /* Point buf to the tail of buffer */
471 * Use io*16_rep() accessors here as well to avoid pointlessly
472 * swapping bytes to and from on the big endian machines...
475 sata_rcar_ioread16_rep(data_addr, pad, 1);
479 sata_rcar_iowrite16_rep(data_addr, pad, 1);
487 static void sata_rcar_drain_fifo(struct ata_queued_cmd *qc)
492 /* We only need to flush incoming data when a command was running */
493 if (qc == NULL || qc->dma_dir == DMA_TO_DEVICE)
497 /* Drain up to 64K of data before we give up this recovery method */
498 for (count = 0; (ap->ops->sff_check_status(ap) & ATA_DRQ) &&
499 count < 65536; count += 2)
500 ioread32(ap->ioaddr.data_addr);
502 /* Can become DEBUG later */
504 ata_port_dbg(ap, "drained %d bytes to clear DRQ\n", count);
507 static int sata_rcar_scr_read(struct ata_link *link, unsigned int sc_reg,
510 if (sc_reg > SCR_ACTIVE)
513 *val = ioread32(link->ap->ioaddr.scr_addr + (sc_reg << 2));
517 static int sata_rcar_scr_write(struct ata_link *link, unsigned int sc_reg,
520 if (sc_reg > SCR_ACTIVE)
523 iowrite32(val, link->ap->ioaddr.scr_addr + (sc_reg << 2));
527 static void sata_rcar_bmdma_fill_sg(struct ata_queued_cmd *qc)
529 struct ata_port *ap = qc->ap;
530 struct ata_bmdma_prd *prd = ap->bmdma_prd;
531 struct scatterlist *sg;
534 for_each_sg(qc->sg, sg, qc->n_elem, si) {
538 * Note: h/w doesn't support 64-bit, so we unconditionally
539 * truncate dma_addr_t to u32.
541 addr = (u32)sg_dma_address(sg);
542 sg_len = sg_dma_len(sg);
544 prd[si].addr = cpu_to_le32(addr);
545 prd[si].flags_len = cpu_to_le32(sg_len);
546 VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", si, addr, sg_len);
549 /* end-of-table flag */
550 prd[si - 1].addr |= cpu_to_le32(SATA_RCAR_DTEND);
553 static void sata_rcar_qc_prep(struct ata_queued_cmd *qc)
555 if (!(qc->flags & ATA_QCFLAG_DMAMAP))
558 sata_rcar_bmdma_fill_sg(qc);
561 static void sata_rcar_bmdma_setup(struct ata_queued_cmd *qc)
563 struct ata_port *ap = qc->ap;
564 unsigned int rw = qc->tf.flags & ATA_TFLAG_WRITE;
565 struct sata_rcar_priv *priv = ap->host->private_data;
566 void __iomem *base = priv->base;
569 /* load PRD table addr. */
570 mb(); /* make sure PRD table writes are visible to controller */
571 iowrite32(ap->bmdma_prd_dma, base + ATAPI_DTB_ADR_REG);
573 /* specify data direction, triple-check start bit is clear */
574 dmactl = ioread32(base + ATAPI_CONTROL1_REG);
575 dmactl &= ~(ATAPI_CONTROL1_RW | ATAPI_CONTROL1_STOP);
576 if (dmactl & ATAPI_CONTROL1_START) {
577 dmactl &= ~ATAPI_CONTROL1_START;
578 dmactl |= ATAPI_CONTROL1_STOP;
581 dmactl |= ATAPI_CONTROL1_RW;
582 iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
584 /* issue r/w command */
585 ap->ops->sff_exec_command(ap, &qc->tf);
588 static void sata_rcar_bmdma_start(struct ata_queued_cmd *qc)
590 struct ata_port *ap = qc->ap;
591 struct sata_rcar_priv *priv = ap->host->private_data;
592 void __iomem *base = priv->base;
595 /* start host DMA transaction */
596 dmactl = ioread32(base + ATAPI_CONTROL1_REG);
597 dmactl &= ~ATAPI_CONTROL1_STOP;
598 dmactl |= ATAPI_CONTROL1_START;
599 iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
602 static void sata_rcar_bmdma_stop(struct ata_queued_cmd *qc)
604 struct ata_port *ap = qc->ap;
605 struct sata_rcar_priv *priv = ap->host->private_data;
606 void __iomem *base = priv->base;
609 /* force termination of DMA transfer if active */
610 dmactl = ioread32(base + ATAPI_CONTROL1_REG);
611 if (dmactl & ATAPI_CONTROL1_START) {
612 dmactl &= ~ATAPI_CONTROL1_START;
613 dmactl |= ATAPI_CONTROL1_STOP;
614 iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
617 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
618 ata_sff_dma_pause(ap);
621 static u8 sata_rcar_bmdma_status(struct ata_port *ap)
623 struct sata_rcar_priv *priv = ap->host->private_data;
627 status = ioread32(priv->base + ATAPI_STATUS_REG);
628 if (status & ATAPI_STATUS_DEVINT)
629 host_stat |= ATA_DMA_INTR;
630 if (status & ATAPI_STATUS_ACT)
631 host_stat |= ATA_DMA_ACTIVE;
636 static struct scsi_host_template sata_rcar_sht = {
637 ATA_BASE_SHT(DRV_NAME),
639 * This controller allows transfer chunks up to 512MB which cross 64KB
640 * boundaries, therefore the DMA limits are more relaxed than standard
643 .sg_tablesize = ATA_MAX_PRD,
644 .dma_boundary = SATA_RCAR_DMA_BOUNDARY,
647 static struct ata_port_operations sata_rcar_port_ops = {
648 .inherits = &ata_bmdma_port_ops,
650 .freeze = sata_rcar_freeze,
651 .thaw = sata_rcar_thaw,
652 .softreset = sata_rcar_softreset,
654 .scr_read = sata_rcar_scr_read,
655 .scr_write = sata_rcar_scr_write,
657 .sff_dev_select = sata_rcar_dev_select,
658 .sff_set_devctl = sata_rcar_set_devctl,
659 .sff_check_status = sata_rcar_check_status,
660 .sff_check_altstatus = sata_rcar_check_altstatus,
661 .sff_tf_load = sata_rcar_tf_load,
662 .sff_tf_read = sata_rcar_tf_read,
663 .sff_exec_command = sata_rcar_exec_command,
664 .sff_data_xfer = sata_rcar_data_xfer,
665 .sff_drain_fifo = sata_rcar_drain_fifo,
667 .qc_prep = sata_rcar_qc_prep,
669 .bmdma_setup = sata_rcar_bmdma_setup,
670 .bmdma_start = sata_rcar_bmdma_start,
671 .bmdma_stop = sata_rcar_bmdma_stop,
672 .bmdma_status = sata_rcar_bmdma_status,
675 static void sata_rcar_serr_interrupt(struct ata_port *ap)
677 struct sata_rcar_priv *priv = ap->host->private_data;
678 struct ata_eh_info *ehi = &ap->link.eh_info;
682 serror = ioread32(priv->base + SCRSERR_REG);
686 DPRINTK("SError @host_intr: 0x%x\n", serror);
688 /* first, analyze and record host port events */
689 ata_ehi_clear_desc(ehi);
691 if (serror & (SERR_DEV_XCHG | SERR_PHYRDY_CHG)) {
692 /* Setup a soft-reset EH action */
693 ata_ehi_hotplugged(ehi);
694 ata_ehi_push_desc(ehi, "%s", "hotplug");
696 freeze = serror & SERR_COMM_WAKE ? 0 : 1;
699 /* freeze or abort */
706 static void sata_rcar_ata_interrupt(struct ata_port *ap)
708 struct ata_queued_cmd *qc;
711 qc = ata_qc_from_tag(ap, ap->link.active_tag);
713 handled |= ata_bmdma_port_intr(ap, qc);
715 /* be sure to clear ATA interrupt */
717 sata_rcar_check_status(ap);
720 static irqreturn_t sata_rcar_interrupt(int irq, void *dev_instance)
722 struct ata_host *host = dev_instance;
723 struct sata_rcar_priv *priv = host->private_data;
724 void __iomem *base = priv->base;
725 unsigned int handled = 0;
730 spin_lock_irqsave(&host->lock, flags);
732 sataintstat = ioread32(base + SATAINTSTAT_REG);
733 sataintstat &= SATA_RCAR_INT_MASK;
737 iowrite32(~sataintstat & 0x7ff, base + SATAINTSTAT_REG);
741 if (sataintstat & SATAINTSTAT_ATA)
742 sata_rcar_ata_interrupt(ap);
744 if (sataintstat & SATAINTSTAT_SERR)
745 sata_rcar_serr_interrupt(ap);
749 spin_unlock_irqrestore(&host->lock, flags);
751 return IRQ_RETVAL(handled);
754 static void sata_rcar_setup_port(struct ata_host *host)
756 struct ata_port *ap = host->ports[0];
757 struct ata_ioports *ioaddr = &ap->ioaddr;
758 struct sata_rcar_priv *priv = host->private_data;
759 void __iomem *base = priv->base;
761 ap->ops = &sata_rcar_port_ops;
762 ap->pio_mask = ATA_PIO4;
763 ap->udma_mask = ATA_UDMA6;
764 ap->flags |= ATA_FLAG_SATA;
766 ioaddr->cmd_addr = base + SDATA_REG;
767 ioaddr->ctl_addr = base + SSDEVCON_REG;
768 ioaddr->scr_addr = base + SCRSSTS_REG;
769 ioaddr->altstatus_addr = ioaddr->ctl_addr;
771 ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << 2);
772 ioaddr->error_addr = ioaddr->cmd_addr + (ATA_REG_ERR << 2);
773 ioaddr->feature_addr = ioaddr->cmd_addr + (ATA_REG_FEATURE << 2);
774 ioaddr->nsect_addr = ioaddr->cmd_addr + (ATA_REG_NSECT << 2);
775 ioaddr->lbal_addr = ioaddr->cmd_addr + (ATA_REG_LBAL << 2);
776 ioaddr->lbam_addr = ioaddr->cmd_addr + (ATA_REG_LBAM << 2);
777 ioaddr->lbah_addr = ioaddr->cmd_addr + (ATA_REG_LBAH << 2);
778 ioaddr->device_addr = ioaddr->cmd_addr + (ATA_REG_DEVICE << 2);
779 ioaddr->status_addr = ioaddr->cmd_addr + (ATA_REG_STATUS << 2);
780 ioaddr->command_addr = ioaddr->cmd_addr + (ATA_REG_CMD << 2);
783 static void sata_rcar_init_controller(struct ata_host *host)
785 struct sata_rcar_priv *priv = host->private_data;
786 void __iomem *base = priv->base;
789 /* reset and setup phy */
790 switch (priv->type) {
792 sata_rcar_gen1_phy_init(priv);
795 sata_rcar_gen2_phy_init(priv);
798 dev_warn(host->dev, "SATA phy is not initialized\n");
802 /* SATA-IP reset state */
803 val = ioread32(base + ATAPI_CONTROL1_REG);
804 val |= ATAPI_CONTROL1_RESET;
805 iowrite32(val, base + ATAPI_CONTROL1_REG);
807 /* ISM mode, PRD mode, DTEND flag at bit 0 */
808 val = ioread32(base + ATAPI_CONTROL1_REG);
809 val |= ATAPI_CONTROL1_ISM;
810 val |= ATAPI_CONTROL1_DESE;
811 val |= ATAPI_CONTROL1_DTA32M;
812 iowrite32(val, base + ATAPI_CONTROL1_REG);
814 /* Release the SATA-IP from the reset state */
815 val = ioread32(base + ATAPI_CONTROL1_REG);
816 val &= ~ATAPI_CONTROL1_RESET;
817 iowrite32(val, base + ATAPI_CONTROL1_REG);
820 iowrite32(0, base + SATAINTSTAT_REG);
821 iowrite32(0x7ff, base + SATAINTMASK_REG);
822 /* enable interrupts */
823 iowrite32(ATAPI_INT_ENABLE_SATAINT, base + ATAPI_INT_ENABLE_REG);
826 static struct of_device_id sata_rcar_match[] = {
828 /* Deprecated by "renesas,sata-r8a7779" */
829 .compatible = "renesas,rcar-sata",
830 .data = (void *)RCAR_GEN1_SATA,
833 .compatible = "renesas,sata-r8a7779",
834 .data = (void *)RCAR_GEN1_SATA,
837 .compatible = "renesas,sata-r8a7790",
838 .data = (void *)RCAR_GEN2_SATA
841 .compatible = "renesas,sata-r8a7791",
842 .data = (void *)RCAR_GEN2_SATA
846 MODULE_DEVICE_TABLE(of, sata_rcar_match);
848 static const struct platform_device_id sata_rcar_id_table[] = {
849 { "sata_rcar", RCAR_GEN1_SATA }, /* Deprecated by "sata-r8a7779" */
850 { "sata-r8a7779", RCAR_GEN1_SATA },
851 { "sata-r8a7790", RCAR_GEN2_SATA },
852 { "sata-r8a7791", RCAR_GEN2_SATA },
855 MODULE_DEVICE_TABLE(platform, sata_rcar_id_table);
857 static int sata_rcar_probe(struct platform_device *pdev)
859 const struct of_device_id *of_id;
860 struct ata_host *host;
861 struct sata_rcar_priv *priv;
862 struct resource *mem;
866 irq = platform_get_irq(pdev, 0);
870 priv = devm_kzalloc(&pdev->dev, sizeof(struct sata_rcar_priv),
875 of_id = of_match_device(sata_rcar_match, &pdev->dev);
877 priv->type = (enum sata_rcar_type)of_id->data;
879 priv->type = platform_get_device_id(pdev)->driver_data;
881 priv->clk = devm_clk_get(&pdev->dev, NULL);
882 if (IS_ERR(priv->clk)) {
883 dev_err(&pdev->dev, "failed to get access to sata clock\n");
884 return PTR_ERR(priv->clk);
886 clk_prepare_enable(priv->clk);
888 host = ata_host_alloc(&pdev->dev, 1);
890 dev_err(&pdev->dev, "ata_host_alloc failed\n");
895 host->private_data = priv;
897 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
898 priv->base = devm_ioremap_resource(&pdev->dev, mem);
899 if (IS_ERR(priv->base)) {
900 ret = PTR_ERR(priv->base);
905 sata_rcar_setup_port(host);
907 /* initialize host controller */
908 sata_rcar_init_controller(host);
910 ret = ata_host_activate(host, irq, sata_rcar_interrupt, 0,
916 clk_disable_unprepare(priv->clk);
921 static int sata_rcar_remove(struct platform_device *pdev)
923 struct ata_host *host = platform_get_drvdata(pdev);
924 struct sata_rcar_priv *priv = host->private_data;
925 void __iomem *base = priv->base;
927 ata_host_detach(host);
929 /* disable interrupts */
930 iowrite32(0, base + ATAPI_INT_ENABLE_REG);
932 iowrite32(0, base + SATAINTSTAT_REG);
933 iowrite32(0x7ff, base + SATAINTMASK_REG);
935 clk_disable_unprepare(priv->clk);
941 static int sata_rcar_suspend(struct device *dev)
943 struct ata_host *host = dev_get_drvdata(dev);
944 struct sata_rcar_priv *priv = host->private_data;
945 void __iomem *base = priv->base;
948 ret = ata_host_suspend(host, PMSG_SUSPEND);
950 /* disable interrupts */
951 iowrite32(0, base + ATAPI_INT_ENABLE_REG);
953 iowrite32(0x7ff, base + SATAINTMASK_REG);
955 clk_disable_unprepare(priv->clk);
961 static int sata_rcar_resume(struct device *dev)
963 struct ata_host *host = dev_get_drvdata(dev);
964 struct sata_rcar_priv *priv = host->private_data;
965 void __iomem *base = priv->base;
967 clk_prepare_enable(priv->clk);
970 iowrite32(0, base + SATAINTSTAT_REG);
971 iowrite32(0x7ff, base + SATAINTMASK_REG);
972 /* enable interrupts */
973 iowrite32(ATAPI_INT_ENABLE_SATAINT, base + ATAPI_INT_ENABLE_REG);
975 ata_host_resume(host);
980 static const struct dev_pm_ops sata_rcar_pm_ops = {
981 .suspend = sata_rcar_suspend,
982 .resume = sata_rcar_resume,
986 static struct platform_driver sata_rcar_driver = {
987 .probe = sata_rcar_probe,
988 .remove = sata_rcar_remove,
989 .id_table = sata_rcar_id_table,
992 .owner = THIS_MODULE,
993 .of_match_table = sata_rcar_match,
995 .pm = &sata_rcar_pm_ops,
1000 module_platform_driver(sata_rcar_driver);
1002 MODULE_LICENSE("GPL");
1003 MODULE_AUTHOR("Vladimir Barinov");
1004 MODULE_DESCRIPTION("Renesas R-Car SATA controller low level driver");