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path: root/drivers/ata/sata_rcar.c
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Diffstat (limited to 'drivers/ata/sata_rcar.c')
-rw-r--r--drivers/ata/sata_rcar.c160
1 files changed, 85 insertions, 75 deletions
diff --git a/drivers/ata/sata_rcar.c b/drivers/ata/sata_rcar.c
index 4799868bd733..8108eb065444 100644
--- a/drivers/ata/sata_rcar.c
+++ b/drivers/ata/sata_rcar.c
@@ -121,6 +121,8 @@
/* Descriptor table word 0 bit (when DTA32M = 1) */
#define SATA_RCAR_DTEND BIT(0)
+#define SATA_RCAR_DMA_BOUNDARY 0x1FFFFFFEUL
+
struct sata_rcar_priv {
void __iomem *base;
struct clk *clk;
@@ -128,41 +130,44 @@ struct sata_rcar_priv {
static void sata_rcar_phy_initialize(struct sata_rcar_priv *priv)
{
+ void __iomem *base = priv->base;
+
/* idle state */
- iowrite32(0, priv->base + SATAPHYADDR_REG);
+ iowrite32(0, base + SATAPHYADDR_REG);
/* reset */
- iowrite32(SATAPHYRESET_PHYRST, priv->base + SATAPHYRESET_REG);
+ iowrite32(SATAPHYRESET_PHYRST, base + SATAPHYRESET_REG);
udelay(10);
/* deassert reset */
- iowrite32(0, priv->base + SATAPHYRESET_REG);
+ iowrite32(0, base + SATAPHYRESET_REG);
}
static void sata_rcar_phy_write(struct sata_rcar_priv *priv, u16 reg, u32 val,
int group)
{
+ void __iomem *base = priv->base;
int timeout;
/* deassert reset */
- iowrite32(0, priv->base + SATAPHYRESET_REG);
+ iowrite32(0, base + SATAPHYRESET_REG);
/* lane 1 */
- iowrite32(SATAPHYACCEN_PHYLANE, priv->base + SATAPHYACCEN_REG);
+ iowrite32(SATAPHYACCEN_PHYLANE, base + SATAPHYACCEN_REG);
/* write phy register value */
- iowrite32(val, priv->base + SATAPHYWDATA_REG);
+ iowrite32(val, base + SATAPHYWDATA_REG);
/* set register group */
if (group)
reg |= SATAPHYADDR_PHYRATEMODE;
/* write command */
- iowrite32(SATAPHYADDR_PHYCMD_WRITE | reg, priv->base + SATAPHYADDR_REG);
+ iowrite32(SATAPHYADDR_PHYCMD_WRITE | reg, base + SATAPHYADDR_REG);
/* wait for ack */
for (timeout = 0; timeout < 100; timeout++) {
- val = ioread32(priv->base + SATAPHYACK_REG);
+ val = ioread32(base + SATAPHYACK_REG);
if (val & SATAPHYACK_PHYACK)
break;
}
if (timeout >= 100)
pr_err("%s timeout\n", __func__);
/* idle state */
- iowrite32(0, priv->base + SATAPHYADDR_REG);
+ iowrite32(0, base + SATAPHYADDR_REG);
}
static void sata_rcar_freeze(struct ata_port *ap)
@@ -178,14 +183,15 @@ static void sata_rcar_freeze(struct ata_port *ap)
static void sata_rcar_thaw(struct ata_port *ap)
{
struct sata_rcar_priv *priv = ap->host->private_data;
+ void __iomem *base = priv->base;
/* ack */
- iowrite32(~SATA_RCAR_INT_MASK, priv->base + SATAINTSTAT_REG);
+ iowrite32(~(u32)SATA_RCAR_INT_MASK, base + SATAINTSTAT_REG);
ata_sff_thaw(ap);
/* unmask */
- iowrite32(0x7ff & ~SATA_RCAR_INT_MASK, priv->base + SATAINTMASK_REG);
+ iowrite32(0x7ff & ~SATA_RCAR_INT_MASK, base + SATAINTMASK_REG);
}
static void sata_rcar_ioread16_rep(void __iomem *reg, void *buffer, int count)
@@ -474,11 +480,10 @@ static void sata_rcar_bmdma_fill_sg(struct ata_queued_cmd *qc)
struct ata_port *ap = qc->ap;
struct ata_bmdma_prd *prd = ap->bmdma_prd;
struct scatterlist *sg;
- unsigned int si, pi;
+ unsigned int si;
- pi = 0;
for_each_sg(qc->sg, sg, qc->n_elem, si) {
- u32 addr, sg_len, len;
+ u32 addr, sg_len;
/*
* Note: h/w doesn't support 64-bit, so we unconditionally
@@ -487,24 +492,13 @@ static void sata_rcar_bmdma_fill_sg(struct ata_queued_cmd *qc)
addr = (u32)sg_dma_address(sg);
sg_len = sg_dma_len(sg);
- /* H/w transfer count is only 29 bits long, let's be careful */
- while (sg_len) {
- len = sg_len;
- if (len > 0x1ffffffe)
- len = 0x1ffffffe;
-
- prd[pi].addr = cpu_to_le32(addr);
- prd[pi].flags_len = cpu_to_le32(len);
- VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", pi, addr, len);
-
- pi++;
- sg_len -= len;
- addr += len;
- }
+ prd[si].addr = cpu_to_le32(addr);
+ prd[si].flags_len = cpu_to_le32(sg_len);
+ VPRINTK("PRD[%u] = (0x%X, 0x%X)\n", si, addr, sg_len);
}
/* end-of-table flag */
- prd[pi - 1].addr |= cpu_to_le32(SATA_RCAR_DTEND);
+ prd[si - 1].addr |= cpu_to_le32(SATA_RCAR_DTEND);
}
static void sata_rcar_qc_prep(struct ata_queued_cmd *qc)
@@ -519,15 +513,16 @@ static void sata_rcar_bmdma_setup(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
unsigned int rw = qc->tf.flags & ATA_TFLAG_WRITE;
- u32 dmactl;
struct sata_rcar_priv *priv = ap->host->private_data;
+ void __iomem *base = priv->base;
+ u32 dmactl;
/* load PRD table addr. */
mb(); /* make sure PRD table writes are visible to controller */
- iowrite32(ap->bmdma_prd_dma, priv->base + ATAPI_DTB_ADR_REG);
+ iowrite32(ap->bmdma_prd_dma, base + ATAPI_DTB_ADR_REG);
/* specify data direction, triple-check start bit is clear */
- dmactl = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ dmactl = ioread32(base + ATAPI_CONTROL1_REG);
dmactl &= ~(ATAPI_CONTROL1_RW | ATAPI_CONTROL1_STOP);
if (dmactl & ATAPI_CONTROL1_START) {
dmactl &= ~ATAPI_CONTROL1_START;
@@ -535,7 +530,7 @@ static void sata_rcar_bmdma_setup(struct ata_queued_cmd *qc)
}
if (!rw)
dmactl |= ATAPI_CONTROL1_RW;
- iowrite32(dmactl, priv->base + ATAPI_CONTROL1_REG);
+ iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
/* issue r/w command */
ap->ops->sff_exec_command(ap, &qc->tf);
@@ -544,27 +539,30 @@ static void sata_rcar_bmdma_setup(struct ata_queued_cmd *qc)
static void sata_rcar_bmdma_start(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
- u32 dmactl;
struct sata_rcar_priv *priv = ap->host->private_data;
+ void __iomem *base = priv->base;
+ u32 dmactl;
/* start host DMA transaction */
- dmactl = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ dmactl = ioread32(base + ATAPI_CONTROL1_REG);
+ dmactl &= ~ATAPI_CONTROL1_STOP;
dmactl |= ATAPI_CONTROL1_START;
- iowrite32(dmactl, priv->base + ATAPI_CONTROL1_REG);
+ iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
}
static void sata_rcar_bmdma_stop(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
struct sata_rcar_priv *priv = ap->host->private_data;
+ void __iomem *base = priv->base;
u32 dmactl;
/* force termination of DMA transfer if active */
- dmactl = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ dmactl = ioread32(base + ATAPI_CONTROL1_REG);
if (dmactl & ATAPI_CONTROL1_START) {
dmactl &= ~ATAPI_CONTROL1_START;
dmactl |= ATAPI_CONTROL1_STOP;
- iowrite32(dmactl, priv->base + ATAPI_CONTROL1_REG);
+ iowrite32(dmactl, base + ATAPI_CONTROL1_REG);
}
/* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
@@ -574,8 +572,8 @@ static void sata_rcar_bmdma_stop(struct ata_queued_cmd *qc)
static u8 sata_rcar_bmdma_status(struct ata_port *ap)
{
struct sata_rcar_priv *priv = ap->host->private_data;
- u32 status;
u8 host_stat = 0;
+ u32 status;
status = ioread32(priv->base + ATAPI_STATUS_REG);
if (status & ATAPI_STATUS_DEVINT)
@@ -587,7 +585,14 @@ static u8 sata_rcar_bmdma_status(struct ata_port *ap)
}
static struct scsi_host_template sata_rcar_sht = {
- ATA_BMDMA_SHT(DRV_NAME),
+ ATA_BASE_SHT(DRV_NAME),
+ /*
+ * This controller allows transfer chunks up to 512MB which cross 64KB
+ * boundaries, therefore the DMA limits are more relaxed than standard
+ * ATA SFF.
+ */
+ .sg_tablesize = ATA_MAX_PRD,
+ .dma_boundary = SATA_RCAR_DMA_BOUNDARY,
};
static struct ata_port_operations sata_rcar_port_ops = {
@@ -618,17 +623,16 @@ static struct ata_port_operations sata_rcar_port_ops = {
.bmdma_status = sata_rcar_bmdma_status,
};
-static int sata_rcar_serr_interrupt(struct ata_port *ap)
+static void sata_rcar_serr_interrupt(struct ata_port *ap)
{
struct sata_rcar_priv *priv = ap->host->private_data;
struct ata_eh_info *ehi = &ap->link.eh_info;
int freeze = 0;
- int handled = 0;
u32 serror;
serror = ioread32(priv->base + SCRSERR_REG);
if (!serror)
- return 0;
+ return;
DPRINTK("SError @host_intr: 0x%x\n", serror);
@@ -641,7 +645,6 @@ static int sata_rcar_serr_interrupt(struct ata_port *ap)
ata_ehi_push_desc(ehi, "%s", "hotplug");
freeze = serror & SERR_COMM_WAKE ? 0 : 1;
- handled = 1;
}
/* freeze or abort */
@@ -649,11 +652,9 @@ static int sata_rcar_serr_interrupt(struct ata_port *ap)
ata_port_freeze(ap);
else
ata_port_abort(ap);
-
- return handled;
}
-static int sata_rcar_ata_interrupt(struct ata_port *ap)
+static void sata_rcar_ata_interrupt(struct ata_port *ap)
{
struct ata_queued_cmd *qc;
int handled = 0;
@@ -662,35 +663,39 @@ static int sata_rcar_ata_interrupt(struct ata_port *ap)
if (qc)
handled |= ata_bmdma_port_intr(ap, qc);
- return handled;
+ /* be sure to clear ATA interrupt */
+ if (!handled)
+ sata_rcar_check_status(ap);
}
static irqreturn_t sata_rcar_interrupt(int irq, void *dev_instance)
{
struct ata_host *host = dev_instance;
struct sata_rcar_priv *priv = host->private_data;
- struct ata_port *ap;
+ void __iomem *base = priv->base;
unsigned int handled = 0;
+ struct ata_port *ap;
u32 sataintstat;
unsigned long flags;
spin_lock_irqsave(&host->lock, flags);
- sataintstat = ioread32(priv->base + SATAINTSTAT_REG);
+ sataintstat = ioread32(base + SATAINTSTAT_REG);
+ sataintstat &= SATA_RCAR_INT_MASK;
if (!sataintstat)
goto done;
/* ack */
- iowrite32(sataintstat & ~SATA_RCAR_INT_MASK,
- priv->base + SATAINTSTAT_REG);
+ iowrite32(~sataintstat & 0x7ff, base + SATAINTSTAT_REG);
ap = host->ports[0];
if (sataintstat & SATAINTSTAT_ATA)
- handled |= sata_rcar_ata_interrupt(ap);
+ sata_rcar_ata_interrupt(ap);
if (sataintstat & SATAINTSTAT_SERR)
- handled |= sata_rcar_serr_interrupt(ap);
+ sata_rcar_serr_interrupt(ap);
+ handled = 1;
done:
spin_unlock_irqrestore(&host->lock, flags);
@@ -702,15 +707,16 @@ static void sata_rcar_setup_port(struct ata_host *host)
struct ata_port *ap = host->ports[0];
struct ata_ioports *ioaddr = &ap->ioaddr;
struct sata_rcar_priv *priv = host->private_data;
+ void __iomem *base = priv->base;
ap->ops = &sata_rcar_port_ops;
ap->pio_mask = ATA_PIO4;
ap->udma_mask = ATA_UDMA6;
ap->flags |= ATA_FLAG_SATA;
- ioaddr->cmd_addr = priv->base + SDATA_REG;
- ioaddr->ctl_addr = priv->base + SSDEVCON_REG;
- ioaddr->scr_addr = priv->base + SCRSSTS_REG;
+ ioaddr->cmd_addr = base + SDATA_REG;
+ ioaddr->ctl_addr = base + SSDEVCON_REG;
+ ioaddr->scr_addr = base + SCRSSTS_REG;
ioaddr->altstatus_addr = ioaddr->ctl_addr;
ioaddr->data_addr = ioaddr->cmd_addr + (ATA_REG_DATA << 2);
@@ -728,6 +734,7 @@ static void sata_rcar_setup_port(struct ata_host *host)
static void sata_rcar_init_controller(struct ata_host *host)
{
struct sata_rcar_priv *priv = host->private_data;
+ void __iomem *base = priv->base;
u32 val;
/* reset and setup phy */
@@ -740,27 +747,27 @@ static void sata_rcar_init_controller(struct ata_host *host)
sata_rcar_phy_write(priv, SATAPCTLR4_REG, 0x28E80000, 0);
/* SATA-IP reset state */
- val = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ val = ioread32(base + ATAPI_CONTROL1_REG);
val |= ATAPI_CONTROL1_RESET;
- iowrite32(val, priv->base + ATAPI_CONTROL1_REG);
+ iowrite32(val, base + ATAPI_CONTROL1_REG);
/* ISM mode, PRD mode, DTEND flag at bit 0 */
- val = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ val = ioread32(base + ATAPI_CONTROL1_REG);
val |= ATAPI_CONTROL1_ISM;
val |= ATAPI_CONTROL1_DESE;
val |= ATAPI_CONTROL1_DTA32M;
- iowrite32(val, priv->base + ATAPI_CONTROL1_REG);
+ iowrite32(val, base + ATAPI_CONTROL1_REG);
/* Release the SATA-IP from the reset state */
- val = ioread32(priv->base + ATAPI_CONTROL1_REG);
+ val = ioread32(base + ATAPI_CONTROL1_REG);
val &= ~ATAPI_CONTROL1_RESET;
- iowrite32(val, priv->base + ATAPI_CONTROL1_REG);
+ iowrite32(val, base + ATAPI_CONTROL1_REG);
/* ack and mask */
- iowrite32(0, priv->base + SATAINTSTAT_REG);
- iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+ iowrite32(0, base + SATAINTSTAT_REG);
+ iowrite32(0x7ff, base + SATAINTMASK_REG);
/* enable interrupts */
- iowrite32(ATAPI_INT_ENABLE_SATAINT, priv->base + ATAPI_INT_ENABLE_REG);
+ iowrite32(ATAPI_INT_ENABLE_SATAINT, base + ATAPI_INT_ENABLE_REG);
}
static int sata_rcar_probe(struct platform_device *pdev)
@@ -825,16 +832,17 @@ cleanup:
static int sata_rcar_remove(struct platform_device *pdev)
{
- struct ata_host *host = dev_get_drvdata(&pdev->dev);
+ struct ata_host *host = platform_get_drvdata(pdev);
struct sata_rcar_priv *priv = host->private_data;
+ void __iomem *base = priv->base;
ata_host_detach(host);
/* disable interrupts */
- iowrite32(0, priv->base + ATAPI_INT_ENABLE_REG);
+ iowrite32(0, base + ATAPI_INT_ENABLE_REG);
/* ack and mask */
- iowrite32(0, priv->base + SATAINTSTAT_REG);
- iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+ iowrite32(0, base + SATAINTSTAT_REG);
+ iowrite32(0x7ff, base + SATAINTMASK_REG);
clk_disable(priv->clk);
@@ -846,14 +854,15 @@ static int sata_rcar_suspend(struct device *dev)
{
struct ata_host *host = dev_get_drvdata(dev);
struct sata_rcar_priv *priv = host->private_data;
+ void __iomem *base = priv->base;
int ret;
ret = ata_host_suspend(host, PMSG_SUSPEND);
if (!ret) {
/* disable interrupts */
- iowrite32(0, priv->base + ATAPI_INT_ENABLE_REG);
+ iowrite32(0, base + ATAPI_INT_ENABLE_REG);
/* mask */
- iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+ iowrite32(0x7ff, base + SATAINTMASK_REG);
clk_disable(priv->clk);
}
@@ -865,14 +874,15 @@ static int sata_rcar_resume(struct device *dev)
{
struct ata_host *host = dev_get_drvdata(dev);
struct sata_rcar_priv *priv = host->private_data;
+ void __iomem *base = priv->base;
clk_enable(priv->clk);
/* ack and mask */
- iowrite32(0, priv->base + SATAINTSTAT_REG);
- iowrite32(0x7ff, priv->base + SATAINTMASK_REG);
+ iowrite32(0, base + SATAINTSTAT_REG);
+ iowrite32(0x7ff, base + SATAINTMASK_REG);
/* enable interrupts */
- iowrite32(ATAPI_INT_ENABLE_SATAINT, priv->base + ATAPI_INT_ENABLE_REG);
+ iowrite32(ATAPI_INT_ENABLE_SATAINT, base + ATAPI_INT_ENABLE_REG);
ata_host_resume(host);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 04:20:46 +0000