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d37d16488c
openwrt/target/linux/apm821xx/patches-4.4/020-sata-dwc.patch
Christian Lamparter d37d16488c apm821xx: sata_dwc_460ex: backport fixes and cleanups from 4.7 
This patch fixes the sata_dwc_460ex SATA driver which is used
by the SATA controllers in the MyBook Live Series and WNDR4700.

The code was backported from the upstream kernel.
It can be dropped completely on 4.7+.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
2016-07-22 09:48:12 +02:00

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34 KiB
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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Sat, 21 May 2016 22:46:32 +0200
Subject: [PATCH v2 00/23] ata: sata_dwc_460ex: make it working again
The last approach in the commit 8b3444852a2b ("sata_dwc_460ex: move to generic
DMA driver") to switch to generic DMA engine API wasn't tested on bare metal.
Besides that we expecting new board support coming with the same SATA IP but
with different DMA.
This series is targetting the following things:
- a few bug fixes to the original driver
- a part to fix the DMA engine usage and in particularly dw_dmac driver
- move driver to use generic PHY and "dmas" property which leads to update in DTS
The driver has been tested myself on Sam460ex and WD MyBookLive (apollo3g)
boards. In any case I ask Christian, Måns, and Julian to independently test and
provide Tested-by tag or an error report.
Series depends on previously published but not yet fully applied series [1].
The patches are also available via public branch [2].
[1] http://www.spinics.net/lists/dmaengine/msg09250.html
[2] https://bitbucket.org/andy-shev/linux/branch/topic%2Fdw%2Fsata
Since v1:
- simplify patch 8 (David Laight)
- add Tested-by and Acked-by tags
Andy Shevchenko (11):
ata: sata_dwc_460ex: set dma_boundary to 0x1fff
ata: sata_dwc_460ex: burst size must be in items not bytes
ata: sata_dwc_460ex: DMA is always a flow controller
ata: sata_dwc_460ex: select only core part of DMA driver
ata: sata_dwc_460ex: don't call ata_sff_qc_issue() on DMA commands
ata: sata_dwc_460ex: correct HOSTDEV{P}_FROM_*() macros
ata: sata_dwc_460ex: supply physical address of FIFO to DMA
ata: sata_dwc_460ex: switch to new dmaengine_terminate_* API
ata: sata_dwc_460ex: use devm_ioremap
ata: sata_dwc_460ex: make debug messages neat
powerpc/4xx: Device tree update for the 460ex DWC SATA
Christian Lamparter (1):
ata: sata_dwc_460ex: fix crash on offline links without an attached
drive
Mans Rullgard (11):
ata: sata_dwc_460ex: remove incorrect locking
ata: sata_dwc_460ex: skip dma setup for non-dma commands
ata: sata_dwc_460ex: use "dmas" DT property to find dma channel
ata: sata_dwc_460ex: add phy support
ata: sata_dwc_460ex: get rid of global data
ata: sata_dwc_460ex: remove empty libata callback
ata: sata_dwc_460ex: get rid of some pointless casts
ata: sata_dwc_460ex: get rid of incorrect cast
ata: sata_dwc_460ex: add __iomem to register base pointer
ata: sata_dwc_460ex: use readl/writel_relaxed()
ata: sata_dwc_460ex: tidy up sata_dwc_clear_dmacr()
arch/powerpc/boot/dts/canyonlands.dts | 15 +-
drivers/ata/Kconfig | 12 +-
drivers/ata/sata_dwc_460ex.c | 552 +++++++++++++++++-----------------
3 files changed, 305 insertions(+), 274 deletions(-)
---
drivers/ata/sata_dwc_460ex.c | 552 ++++++++++++++++++++++---------------------
1 file changed, 283 insertions(+), 269 deletions(-)
diff --git a/drivers/ata/sata_dwc_460ex.c b/drivers/ata/sata_dwc_460ex.c
index 9020349..00c2af1 100644
--- a/drivers/ata/sata_dwc_460ex.c
+++ b/drivers/ata/sata_dwc_460ex.c
@@ -30,10 +30,12 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
+#include <linux/dmaengine.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
#include <linux/libata.h>
#include <linux/slab.h>
@@ -42,10 +44,6 @@
#include <scsi/scsi_host.h>
#include <scsi/scsi_cmnd.h>
-/* Supported DMA engine drivers */
-#include <linux/platform_data/dma-dw.h>
-#include <linux/dma/dw.h>
-
/* These two are defined in "libata.h" */
#undef DRV_NAME
#undef DRV_VERSION
@@ -53,19 +51,14 @@
#define DRV_NAME "sata-dwc"
#define DRV_VERSION "1.3"
-#ifndef out_le32
-#define out_le32(a, v) __raw_writel(__cpu_to_le32(v), (void __iomem *)(a))
-#endif
-
-#ifndef in_le32
-#define in_le32(a) __le32_to_cpu(__raw_readl((void __iomem *)(a)))
-#endif
+#define sata_dwc_writel(a, v) writel_relaxed(v, a)
+#define sata_dwc_readl(a) readl_relaxed(a)
#ifndef NO_IRQ
#define NO_IRQ 0
#endif
-#define AHB_DMA_BRST_DFLT 64 /* 16 data items burst length*/
+#define AHB_DMA_BRST_DFLT 64 /* 16 data items burst length */
enum {
SATA_DWC_MAX_PORTS = 1,
@@ -102,7 +95,7 @@ struct sata_dwc_regs {
u32 versionr; /* Version Register */
u32 idr; /* ID Register */
u32 unimpl[192]; /* Unimplemented */
- u32 dmadr[256]; /* FIFO Locations in DMA Mode */
+ u32 dmadr[256]; /* FIFO Locations in DMA Mode */
};
enum {
@@ -146,9 +139,14 @@ struct sata_dwc_device {
struct device *dev; /* generic device struct */
struct ata_probe_ent *pe; /* ptr to probe-ent */
struct ata_host *host;
- u8 __iomem *reg_base;
- struct sata_dwc_regs *sata_dwc_regs; /* DW Synopsys SATA specific */
+ struct sata_dwc_regs __iomem *sata_dwc_regs; /* DW SATA specific */
+ u32 sactive_issued;
+ u32 sactive_queued;
+ struct phy *phy;
+ phys_addr_t dmadr;
+#ifdef CONFIG_SATA_DWC_OLD_DMA
struct dw_dma_chip *dma;
+#endif
};
#define SATA_DWC_QCMD_MAX 32
@@ -159,25 +157,19 @@ struct sata_dwc_device_port {
int dma_pending[SATA_DWC_QCMD_MAX];
/* DMA info */
- struct dw_dma_slave *dws;
struct dma_chan *chan;
struct dma_async_tx_descriptor *desc[SATA_DWC_QCMD_MAX];
u32 dma_interrupt_count;
};
/*
- * Commonly used DWC SATA driver Macros
+ * Commonly used DWC SATA driver macros
*/
-#define HSDEV_FROM_HOST(host) ((struct sata_dwc_device *)\
- (host)->private_data)
-#define HSDEV_FROM_AP(ap) ((struct sata_dwc_device *)\
- (ap)->host->private_data)
-#define HSDEVP_FROM_AP(ap) ((struct sata_dwc_device_port *)\
- (ap)->private_data)
-#define HSDEV_FROM_QC(qc) ((struct sata_dwc_device *)\
- (qc)->ap->host->private_data)
-#define HSDEV_FROM_HSDEVP(p) ((struct sata_dwc_device *)\
- (hsdevp)->hsdev)
+#define HSDEV_FROM_HOST(host) ((struct sata_dwc_device *)(host)->private_data)
+#define HSDEV_FROM_AP(ap) ((struct sata_dwc_device *)(ap)->host->private_data)
+#define HSDEVP_FROM_AP(ap) ((struct sata_dwc_device_port *)(ap)->private_data)
+#define HSDEV_FROM_QC(qc) ((struct sata_dwc_device *)(qc)->ap->host->private_data)
+#define HSDEV_FROM_HSDEVP(p) ((struct sata_dwc_device *)(p)->hsdev)
enum {
SATA_DWC_CMD_ISSUED_NOT = 0,
@@ -190,21 +182,6 @@ enum {
SATA_DWC_DMA_PENDING_RX = 2,
};
-struct sata_dwc_host_priv {
- void __iomem *scr_addr_sstatus;
- u32 sata_dwc_sactive_issued ;
- u32 sata_dwc_sactive_queued ;
-};
-
-static struct sata_dwc_host_priv host_pvt;
-
-static struct dw_dma_slave sata_dwc_dma_dws = {
- .src_id = 0,
- .dst_id = 0,
- .src_master = 0,
- .dst_master = 1,
-};
-
/*
* Prototypes
*/
@@ -215,6 +192,93 @@ static void sata_dwc_dma_xfer_complete(struct ata_port *ap, u32 check_status);
static void sata_dwc_port_stop(struct ata_port *ap);
static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag);
+#ifdef CONFIG_SATA_DWC_OLD_DMA
+
+#include <linux/platform_data/dma-dw.h>
+#include <linux/dma/dw.h>
+
+static struct dw_dma_slave sata_dwc_dma_dws = {
+ .src_id = 0,
+ .dst_id = 0,
+ .m_master = 1,
+ .p_master = 0,
+};
+
+static bool sata_dwc_dma_filter(struct dma_chan *chan, void *param)
+{
+ struct dw_dma_slave *dws = &sata_dwc_dma_dws;
+
+ if (dws->dma_dev != chan->device->dev)
+ return false;
+
+ chan->private = dws;
+ return true;
+}
+
+static int sata_dwc_dma_get_channel_old(struct sata_dwc_device_port *hsdevp)
+{
+ struct sata_dwc_device *hsdev = hsdevp->hsdev;
+ struct dw_dma_slave *dws = &sata_dwc_dma_dws;
+ dma_cap_mask_t mask;
+
+ dws->dma_dev = hsdev->dev;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+
+ /* Acquire DMA channel */
+ hsdevp->chan = dma_request_channel(mask, sata_dwc_dma_filter, hsdevp);
+ if (!hsdevp->chan) {
+ dev_err(hsdev->dev, "%s: dma channel unavailable\n",
+ __func__);
+ return -EAGAIN;
+ }
+
+ return 0;
+}
+
+static int sata_dwc_dma_init_old(struct platform_device *pdev,
+ struct sata_dwc_device *hsdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct resource *res;
+
+ hsdev->dma = devm_kzalloc(&pdev->dev, sizeof(*hsdev->dma), GFP_KERNEL);
+ if (!hsdev->dma)
+ return -ENOMEM;
+
+ hsdev->dma->dev = &pdev->dev;
+
+ /* Get SATA DMA interrupt number */
+ hsdev->dma->irq = irq_of_parse_and_map(np, 1);
+ if (hsdev->dma->irq == NO_IRQ) {
+ dev_err(&pdev->dev, "no SATA DMA irq\n");
+ return -ENODEV;
+ }
+
+ /* Get physical SATA DMA register base address */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ hsdev->dma->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hsdev->dma->regs)) {
+ dev_err(&pdev->dev,
+ "ioremap failed for AHBDMA register address\n");
+ return PTR_ERR(hsdev->dma->regs);
+ }
+
+ /* Initialize AHB DMAC */
+ return dw_dma_probe(hsdev->dma);
+}
+
+static void sata_dwc_dma_exit_old(struct sata_dwc_device *hsdev)
+{
+ if (!hsdev->dma)
+ return;
+
+ dw_dma_remove(hsdev->dma);
+}
+
+#endif
+
static const char *get_prot_descript(u8 protocol)
{
switch ((enum ata_tf_protocols)protocol) {
@@ -305,21 +369,20 @@ static struct dma_async_tx_descriptor *dma_dwc_xfer_setup(struct ata_queued_cmd
struct ata_port *ap = qc->ap;
struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
- dma_addr_t addr = (dma_addr_t)&hsdev->sata_dwc_regs->dmadr;
struct dma_slave_config sconf;
struct dma_async_tx_descriptor *desc;
if (qc->dma_dir == DMA_DEV_TO_MEM) {
- sconf.src_addr = addr;
- sconf.device_fc = true;
+ sconf.src_addr = hsdev->dmadr;
+ sconf.device_fc = false;
} else { /* DMA_MEM_TO_DEV */
- sconf.dst_addr = addr;
+ sconf.dst_addr = hsdev->dmadr;
sconf.device_fc = false;
}
sconf.direction = qc->dma_dir;
- sconf.src_maxburst = AHB_DMA_BRST_DFLT;
- sconf.dst_maxburst = AHB_DMA_BRST_DFLT;
+ sconf.src_maxburst = AHB_DMA_BRST_DFLT / 4; /* in items */
+ sconf.dst_maxburst = AHB_DMA_BRST_DFLT / 4; /* in items */
sconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
sconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
@@ -336,8 +399,8 @@ static struct dma_async_tx_descriptor *dma_dwc_xfer_setup(struct ata_queued_cmd
desc->callback = dma_dwc_xfer_done;
desc->callback_param = hsdev;
- dev_dbg(hsdev->dev, "%s sg: 0x%p, count: %d addr: %pad\n",
- __func__, qc->sg, qc->n_elem, &addr);
+ dev_dbg(hsdev->dev, "%s sg: 0x%p, count: %d addr: %pa\n", __func__,
+ qc->sg, qc->n_elem, &hsdev->dmadr);
return desc;
}
@@ -350,48 +413,38 @@ static int sata_dwc_scr_read(struct ata_link *link, unsigned int scr, u32 *val)
return -EINVAL;
}
- *val = in_le32(link->ap->ioaddr.scr_addr + (scr * 4));
- dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=val=0x%08x\n",
- __func__, link->ap->print_id, scr, *val);
+ *val = sata_dwc_readl(link->ap->ioaddr.scr_addr + (scr * 4));
+ dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=0x%08x\n", __func__,
+ link->ap->print_id, scr, *val);
return 0;
}
static int sata_dwc_scr_write(struct ata_link *link, unsigned int scr, u32 val)
{
- dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=val=0x%08x\n",
- __func__, link->ap->print_id, scr, val);
+ dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=0x%08x\n", __func__,
+ link->ap->print_id, scr, val);
if (scr > SCR_NOTIFICATION) {
dev_err(link->ap->dev, "%s: Incorrect SCR offset 0x%02x\n",
__func__, scr);
return -EINVAL;
}
- out_le32(link->ap->ioaddr.scr_addr + (scr * 4), val);
+ sata_dwc_writel(link->ap->ioaddr.scr_addr + (scr * 4), val);
return 0;
}
-static u32 core_scr_read(unsigned int scr)
-{
- return in_le32(host_pvt.scr_addr_sstatus + (scr * 4));
-}
-
-static void core_scr_write(unsigned int scr, u32 val)
-{
- out_le32(host_pvt.scr_addr_sstatus + (scr * 4), val);
-}
-
-static void clear_serror(void)
+static void clear_serror(struct ata_port *ap)
{
u32 val;
- val = core_scr_read(SCR_ERROR);
- core_scr_write(SCR_ERROR, val);
+ sata_dwc_scr_read(&ap->link, SCR_ERROR, &val);
+ sata_dwc_scr_write(&ap->link, SCR_ERROR, val);
}
static void clear_interrupt_bit(struct sata_dwc_device *hsdev, u32 bit)
{
- out_le32(&hsdev->sata_dwc_regs->intpr,
- in_le32(&hsdev->sata_dwc_regs->intpr));
+ sata_dwc_writel(&hsdev->sata_dwc_regs->intpr,
+ sata_dwc_readl(&hsdev->sata_dwc_regs->intpr));
}
static u32 qcmd_tag_to_mask(u8 tag)
@@ -412,7 +465,7 @@ static void sata_dwc_error_intr(struct ata_port *ap,
ata_ehi_clear_desc(ehi);
- serror = core_scr_read(SCR_ERROR);
+ sata_dwc_scr_read(&ap->link, SCR_ERROR, &serror);
status = ap->ops->sff_check_status(ap);
tag = ap->link.active_tag;
@@ -423,7 +476,7 @@ static void sata_dwc_error_intr(struct ata_port *ap,
hsdevp->dma_pending[tag], hsdevp->cmd_issued[tag]);
/* Clear error register and interrupt bit */
- clear_serror();
+ clear_serror(ap);
clear_interrupt_bit(hsdev, SATA_DWC_INTPR_ERR);
/* This is the only error happening now. TODO check for exact error */
@@ -462,12 +515,12 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance)
int handled, num_processed, port = 0;
uint intpr, sactive, sactive2, tag_mask;
struct sata_dwc_device_port *hsdevp;
- host_pvt.sata_dwc_sactive_issued = 0;
+ hsdev->sactive_issued = 0;
spin_lock_irqsave(&host->lock, flags);
/* Read the interrupt register */
- intpr = in_le32(&hsdev->sata_dwc_regs->intpr);
+ intpr = sata_dwc_readl(&hsdev->sata_dwc_regs->intpr);
ap = host->ports[port];
hsdevp = HSDEVP_FROM_AP(ap);
@@ -486,12 +539,12 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance)
if (intpr & SATA_DWC_INTPR_NEWFP) {
clear_interrupt_bit(hsdev, SATA_DWC_INTPR_NEWFP);
- tag = (u8)(in_le32(&hsdev->sata_dwc_regs->fptagr));
+ tag = (u8)(sata_dwc_readl(&hsdev->sata_dwc_regs->fptagr));
dev_dbg(ap->dev, "%s: NEWFP tag=%d\n", __func__, tag);
if (hsdevp->cmd_issued[tag] != SATA_DWC_CMD_ISSUED_PEND)
dev_warn(ap->dev, "CMD tag=%d not pending?\n", tag);
- host_pvt.sata_dwc_sactive_issued |= qcmd_tag_to_mask(tag);
+ hsdev->sactive_issued |= qcmd_tag_to_mask(tag);
qc = ata_qc_from_tag(ap, tag);
/*
@@ -505,11 +558,11 @@ static irqreturn_t sata_dwc_isr(int irq, void *dev_instance)
handled = 1;
goto DONE;
}
- sactive = core_scr_read(SCR_ACTIVE);
- tag_mask = (host_pvt.sata_dwc_sactive_issued | sactive) ^ sactive;
+ sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive);
+ tag_mask = (hsdev->sactive_issued | sactive) ^ sactive;
/* If no sactive issued and tag_mask is zero then this is not NCQ */
- if (host_pvt.sata_dwc_sactive_issued == 0 && tag_mask == 0) {
+ if (hsdev->sactive_issued == 0 && tag_mask == 0) {
if (ap->link.active_tag == ATA_TAG_POISON)
tag = 0;
else
@@ -579,22 +632,19 @@ DRVSTILLBUSY:
*/
/* process completed commands */
- sactive = core_scr_read(SCR_ACTIVE);
- tag_mask = (host_pvt.sata_dwc_sactive_issued | sactive) ^ sactive;
+ sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive);
+ tag_mask = (hsdev->sactive_issued | sactive) ^ sactive;
- if (sactive != 0 || (host_pvt.sata_dwc_sactive_issued) > 1 || \
- tag_mask > 1) {
+ if (sactive != 0 || hsdev->sactive_issued > 1 || tag_mask > 1) {
dev_dbg(ap->dev,
"%s NCQ:sactive=0x%08x sactive_issued=0x%08x tag_mask=0x%08x\n",
- __func__, sactive, host_pvt.sata_dwc_sactive_issued,
- tag_mask);
+ __func__, sactive, hsdev->sactive_issued, tag_mask);
}
- if ((tag_mask | (host_pvt.sata_dwc_sactive_issued)) != \
- (host_pvt.sata_dwc_sactive_issued)) {
+ if ((tag_mask | hsdev->sactive_issued) != hsdev->sactive_issued) {
dev_warn(ap->dev,
- "Bad tag mask? sactive=0x%08x (host_pvt.sata_dwc_sactive_issued)=0x%08x tag_mask=0x%08x\n",
- sactive, host_pvt.sata_dwc_sactive_issued, tag_mask);
+ "Bad tag mask? sactive=0x%08x sactive_issued=0x%08x tag_mask=0x%08x\n",
+ sactive, hsdev->sactive_issued, tag_mask);
}
/* read just to clear ... not bad if currently still busy */
@@ -656,7 +706,7 @@ STILLBUSY:
* we were processing --we read status as part of processing a completed
* command).
*/
- sactive2 = core_scr_read(SCR_ACTIVE);
+ sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive2);
if (sactive2 != sactive) {
dev_dbg(ap->dev,
"More completed - sactive=0x%x sactive2=0x%x\n",
@@ -672,15 +722,14 @@ DONE:
static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag)
{
struct sata_dwc_device *hsdev = HSDEV_FROM_HSDEVP(hsdevp);
+ u32 dmacr = sata_dwc_readl(&hsdev->sata_dwc_regs->dmacr);
if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_RX) {
- out_le32(&(hsdev->sata_dwc_regs->dmacr),
- SATA_DWC_DMACR_RX_CLEAR(
- in_le32(&(hsdev->sata_dwc_regs->dmacr))));
+ dmacr = SATA_DWC_DMACR_RX_CLEAR(dmacr);
+ sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr, dmacr);
} else if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_TX) {
- out_le32(&(hsdev->sata_dwc_regs->dmacr),
- SATA_DWC_DMACR_TX_CLEAR(
- in_le32(&(hsdev->sata_dwc_regs->dmacr))));
+ dmacr = SATA_DWC_DMACR_TX_CLEAR(dmacr);
+ sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr, dmacr);
} else {
/*
* This should not happen, it indicates the driver is out of
@@ -688,10 +737,9 @@ static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag)
*/
dev_err(hsdev->dev,
"%s DMA protocol RX and TX DMA not pending tag=0x%02x pending=%d dmacr: 0x%08x\n",
- __func__, tag, hsdevp->dma_pending[tag],
- in_le32(&hsdev->sata_dwc_regs->dmacr));
- out_le32(&(hsdev->sata_dwc_regs->dmacr),
- SATA_DWC_DMACR_TXRXCH_CLEAR);
+ __func__, tag, hsdevp->dma_pending[tag], dmacr);
+ sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr,
+ SATA_DWC_DMACR_TXRXCH_CLEAR);
}
}
@@ -716,7 +764,7 @@ static void sata_dwc_dma_xfer_complete(struct ata_port *ap, u32 check_status)
__func__, qc->tag, qc->tf.command,
get_dma_dir_descript(qc->dma_dir),
get_prot_descript(qc->tf.protocol),
- in_le32(&(hsdev->sata_dwc_regs->dmacr)));
+ sata_dwc_readl(&hsdev->sata_dwc_regs->dmacr));
}
#endif
@@ -725,7 +773,7 @@ static void sata_dwc_dma_xfer_complete(struct ata_port *ap, u32 check_status)
dev_err(ap->dev,
"%s DMA protocol RX and TX DMA not pending dmacr: 0x%08x\n",
__func__,
- in_le32(&(hsdev->sata_dwc_regs->dmacr)));
+ sata_dwc_readl(&hsdev->sata_dwc_regs->dmacr));
}
hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_NONE;
@@ -742,8 +790,9 @@ static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc,
u8 status = 0;
u32 mask = 0x0;
u8 tag = qc->tag;
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
- host_pvt.sata_dwc_sactive_queued = 0;
+ hsdev->sactive_queued = 0;
dev_dbg(ap->dev, "%s checkstatus? %x\n", __func__, check_status);
if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_TX)
@@ -756,10 +805,8 @@ static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc,
/* clear active bit */
mask = (~(qcmd_tag_to_mask(tag)));
- host_pvt.sata_dwc_sactive_queued = (host_pvt.sata_dwc_sactive_queued) \
- & mask;
- host_pvt.sata_dwc_sactive_issued = (host_pvt.sata_dwc_sactive_issued) \
- & mask;
+ hsdev->sactive_queued = hsdev->sactive_queued & mask;
+ hsdev->sactive_issued = hsdev->sactive_issued & mask;
ata_qc_complete(qc);
return 0;
}
@@ -767,54 +814,62 @@ static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc,
static void sata_dwc_enable_interrupts(struct sata_dwc_device *hsdev)
{
/* Enable selective interrupts by setting the interrupt maskregister*/
- out_le32(&hsdev->sata_dwc_regs->intmr,
- SATA_DWC_INTMR_ERRM |
- SATA_DWC_INTMR_NEWFPM |
- SATA_DWC_INTMR_PMABRTM |
- SATA_DWC_INTMR_DMATM);
+ sata_dwc_writel(&hsdev->sata_dwc_regs->intmr,
+ SATA_DWC_INTMR_ERRM |
+ SATA_DWC_INTMR_NEWFPM |
+ SATA_DWC_INTMR_PMABRTM |
+ SATA_DWC_INTMR_DMATM);
/*
* Unmask the error bits that should trigger an error interrupt by
* setting the error mask register.
*/
- out_le32(&hsdev->sata_dwc_regs->errmr, SATA_DWC_SERROR_ERR_BITS);
+ sata_dwc_writel(&hsdev->sata_dwc_regs->errmr, SATA_DWC_SERROR_ERR_BITS);
dev_dbg(hsdev->dev, "%s: INTMR = 0x%08x, ERRMR = 0x%08x\n",
- __func__, in_le32(&hsdev->sata_dwc_regs->intmr),
- in_le32(&hsdev->sata_dwc_regs->errmr));
+ __func__, sata_dwc_readl(&hsdev->sata_dwc_regs->intmr),
+ sata_dwc_readl(&hsdev->sata_dwc_regs->errmr));
}
-static bool sata_dwc_dma_filter(struct dma_chan *chan, void *param)
+static void sata_dwc_setup_port(struct ata_ioports *port, void __iomem *base)
{
- struct sata_dwc_device_port *hsdevp = param;
- struct dw_dma_slave *dws = hsdevp->dws;
+ port->cmd_addr = base + 0x00;
+ port->data_addr = base + 0x00;
- if (dws->dma_dev != chan->device->dev)
- return false;
+ port->error_addr = base + 0x04;
+ port->feature_addr = base + 0x04;
- chan->private = dws;
- return true;
-}
+ port->nsect_addr = base + 0x08;
-static void sata_dwc_setup_port(struct ata_ioports *port, unsigned long base)
-{
- port->cmd_addr = (void __iomem *)base + 0x00;
- port->data_addr = (void __iomem *)base + 0x00;
+ port->lbal_addr = base + 0x0c;
+ port->lbam_addr = base + 0x10;
+ port->lbah_addr = base + 0x14;
- port->error_addr = (void __iomem *)base + 0x04;
- port->feature_addr = (void __iomem *)base + 0x04;
+ port->device_addr = base + 0x18;
+ port->command_addr = base + 0x1c;
+ port->status_addr = base + 0x1c;
- port->nsect_addr = (void __iomem *)base + 0x08;
+ port->altstatus_addr = base + 0x20;
+ port->ctl_addr = base + 0x20;
+}
+
+static int sata_dwc_dma_get_channel(struct sata_dwc_device_port *hsdevp)
+{
+ struct sata_dwc_device *hsdev = hsdevp->hsdev;
+ struct device *dev = hsdev->dev;
- port->lbal_addr = (void __iomem *)base + 0x0c;
- port->lbam_addr = (void __iomem *)base + 0x10;
- port->lbah_addr = (void __iomem *)base + 0x14;
+#ifdef CONFIG_SATA_DWC_OLD_DMA
+ if (!of_find_property(dev->of_node, "dmas", NULL))
+ return sata_dwc_dma_get_channel_old(hsdevp);
+#endif
- port->device_addr = (void __iomem *)base + 0x18;
- port->command_addr = (void __iomem *)base + 0x1c;
- port->status_addr = (void __iomem *)base + 0x1c;
+ hsdevp->chan = dma_request_chan(dev, "sata-dma");
+ if (IS_ERR(hsdevp->chan)) {
+ dev_err(dev, "failed to allocate dma channel: %ld\n",
+ PTR_ERR(hsdevp->chan));
+ return PTR_ERR(hsdevp->chan);
+ }
- port->altstatus_addr = (void __iomem *)base + 0x20;
- port->ctl_addr = (void __iomem *)base + 0x20;
+ return 0;
}
/*
@@ -829,7 +884,6 @@ static int sata_dwc_port_start(struct ata_port *ap)
struct sata_dwc_device *hsdev;
struct sata_dwc_device_port *hsdevp = NULL;
struct device *pdev;
- dma_cap_mask_t mask;
int i;
hsdev = HSDEV_FROM_AP(ap);
@@ -853,20 +907,13 @@ static int sata_dwc_port_start(struct ata_port *ap)
}
hsdevp->hsdev = hsdev;
- hsdevp->dws = &sata_dwc_dma_dws;
- hsdevp->dws->dma_dev = hsdev->dev;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
+ err = sata_dwc_dma_get_channel(hsdevp);
+ if (err)
+ goto CLEANUP_ALLOC;
- /* Acquire DMA channel */
- hsdevp->chan = dma_request_channel(mask, sata_dwc_dma_filter, hsdevp);
- if (!hsdevp->chan) {
- dev_err(hsdev->dev, "%s: dma channel unavailable\n",
- __func__);
- err = -EAGAIN;
+ err = phy_power_on(hsdev->phy);
+ if (err)
goto CLEANUP_ALLOC;
- }
for (i = 0; i < SATA_DWC_QCMD_MAX; i++)
hsdevp->cmd_issued[i] = SATA_DWC_CMD_ISSUED_NOT;
@@ -877,18 +924,18 @@ static int sata_dwc_port_start(struct ata_port *ap)
if (ap->port_no == 0) {
dev_dbg(ap->dev, "%s: clearing TXCHEN, RXCHEN in DMAC\n",
__func__);
- out_le32(&hsdev->sata_dwc_regs->dmacr,
- SATA_DWC_DMACR_TXRXCH_CLEAR);
+ sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr,
+ SATA_DWC_DMACR_TXRXCH_CLEAR);
dev_dbg(ap->dev, "%s: setting burst size in DBTSR\n",
__func__);
- out_le32(&hsdev->sata_dwc_regs->dbtsr,
- (SATA_DWC_DBTSR_MWR(AHB_DMA_BRST_DFLT) |
- SATA_DWC_DBTSR_MRD(AHB_DMA_BRST_DFLT)));
+ sata_dwc_writel(&hsdev->sata_dwc_regs->dbtsr,
+ (SATA_DWC_DBTSR_MWR(AHB_DMA_BRST_DFLT) |
+ SATA_DWC_DBTSR_MRD(AHB_DMA_BRST_DFLT)));
}
/* Clear any error bits before libata starts issuing commands */
- clear_serror();
+ clear_serror(ap);
ap->private_data = hsdevp;
dev_dbg(ap->dev, "%s: done\n", __func__);
return 0;
@@ -903,11 +950,13 @@ CLEANUP:
static void sata_dwc_port_stop(struct ata_port *ap)
{
struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
+ struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap);
dev_dbg(ap->dev, "%s: ap->id = %d\n", __func__, ap->print_id);
- dmaengine_terminate_all(hsdevp->chan);
+ dmaengine_terminate_sync(hsdevp->chan);
dma_release_channel(hsdevp->chan);
+ phy_power_off(hsdev->phy);
kfree(hsdevp);
ap->private_data = NULL;
@@ -924,22 +973,20 @@ static void sata_dwc_exec_command_by_tag(struct ata_port *ap,
struct ata_taskfile *tf,
u8 tag, u32 cmd_issued)
{
- unsigned long flags;
struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
dev_dbg(ap->dev, "%s cmd(0x%02x): %s tag=%d\n", __func__, tf->command,
ata_get_cmd_descript(tf->command), tag);
- spin_lock_irqsave(&ap->host->lock, flags);
hsdevp->cmd_issued[tag] = cmd_issued;
- spin_unlock_irqrestore(&ap->host->lock, flags);
+
/*
* Clear SError before executing a new command.
* sata_dwc_scr_write and read can not be used here. Clearing the PM
* managed SError register for the disk needs to be done before the
* task file is loaded.
*/
- clear_serror();
+ clear_serror(ap);
ata_sff_exec_command(ap, tf);
}
@@ -992,18 +1039,18 @@ static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag)
sata_dwc_tf_dump(ap, &qc->tf);
if (start_dma) {
- reg = core_scr_read(SCR_ERROR);
+ sata_dwc_scr_read(&ap->link, SCR_ERROR, &reg);
if (reg & SATA_DWC_SERROR_ERR_BITS) {
dev_err(ap->dev, "%s: ****** SError=0x%08x ******\n",
__func__, reg);
}
if (dir == DMA_TO_DEVICE)
- out_le32(&hsdev->sata_dwc_regs->dmacr,
- SATA_DWC_DMACR_TXCHEN);
+ sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr,
+ SATA_DWC_DMACR_TXCHEN);
else
- out_le32(&hsdev->sata_dwc_regs->dmacr,
- SATA_DWC_DMACR_RXCHEN);
+ sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr,
+ SATA_DWC_DMACR_RXCHEN);
/* Enable AHB DMA transfer on the specified channel */
dmaengine_submit(desc);
@@ -1025,36 +1072,12 @@ static void sata_dwc_bmdma_start(struct ata_queued_cmd *qc)
sata_dwc_bmdma_start_by_tag(qc, tag);
}
-/*
- * Function : sata_dwc_qc_prep_by_tag
- * arguments : ata_queued_cmd *qc, u8 tag
- * Return value : None
- * qc_prep for a particular queued command based on tag
- */
-static void sata_dwc_qc_prep_by_tag(struct ata_queued_cmd *qc, u8 tag)
-{
- struct dma_async_tx_descriptor *desc;
- struct ata_port *ap = qc->ap;
- struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
-
- dev_dbg(ap->dev, "%s: port=%d dma dir=%s n_elem=%d\n",
- __func__, ap->port_no, get_dma_dir_descript(qc->dma_dir),
- qc->n_elem);
-
- desc = dma_dwc_xfer_setup(qc);
- if (!desc) {
- dev_err(ap->dev, "%s: dma_dwc_xfer_setup returns NULL\n",
- __func__);
- return;
- }
- hsdevp->desc[tag] = desc;
-}
-
static unsigned int sata_dwc_qc_issue(struct ata_queued_cmd *qc)
{
u32 sactive;
u8 tag = qc->tag;
struct ata_port *ap = qc->ap;
+ struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap);
#ifdef DEBUG_NCQ
if (qc->tag > 0 || ap->link.sactive > 1)
@@ -1068,47 +1091,33 @@ static unsigned int sata_dwc_qc_issue(struct ata_queued_cmd *qc)
if (!ata_is_ncq(qc->tf.protocol))
tag = 0;
- sata_dwc_qc_prep_by_tag(qc, tag);
+
+ if (ata_is_dma(qc->tf.protocol)) {
+ hsdevp->desc[tag] = dma_dwc_xfer_setup(qc);
+ if (!hsdevp->desc[tag])
+ return AC_ERR_SYSTEM;
+ } else {
+ hsdevp->desc[tag] = NULL;
+ }
if (ata_is_ncq(qc->tf.protocol)) {
- sactive = core_scr_read(SCR_ACTIVE);
+ sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive);
sactive |= (0x00000001 << tag);
- core_scr_write(SCR_ACTIVE, sactive);
+ sata_dwc_scr_write(&ap->link, SCR_ACTIVE, sactive);
dev_dbg(qc->ap->dev,
"%s: tag=%d ap->link.sactive = 0x%08x sactive=0x%08x\n",
__func__, tag, qc->ap->link.sactive, sactive);
ap->ops->sff_tf_load(ap, &qc->tf);
- sata_dwc_exec_command_by_tag(ap, &qc->tf, qc->tag,
+ sata_dwc_exec_command_by_tag(ap, &qc->tf, tag,
SATA_DWC_CMD_ISSUED_PEND);
} else {
- ata_sff_qc_issue(qc);
+ return ata_bmdma_qc_issue(qc);
}
return 0;
}
-/*
- * Function : sata_dwc_qc_prep
- * arguments : ata_queued_cmd *qc
- * Return value : None
- * qc_prep for a particular queued command
- */
-
-static void sata_dwc_qc_prep(struct ata_queued_cmd *qc)
-{
- if ((qc->dma_dir == DMA_NONE) || (qc->tf.protocol == ATA_PROT_PIO))
- return;
-
-#ifdef DEBUG_NCQ
- if (qc->tag > 0)
- dev_info(qc->ap->dev, "%s: qc->tag=%d ap->active_tag=0x%08x\n",
- __func__, qc->tag, qc->ap->link.active_tag);
-
- return ;
-#endif
-}
-
static void sata_dwc_error_handler(struct ata_port *ap)
{
ata_sff_error_handler(ap);
@@ -1125,17 +1134,22 @@ static int sata_dwc_hardreset(struct ata_link *link, unsigned int *class,
sata_dwc_enable_interrupts(hsdev);
/* Reconfigure the DMA control register */
- out_le32(&hsdev->sata_dwc_regs->dmacr,
- SATA_DWC_DMACR_TXRXCH_CLEAR);
+ sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr,
+ SATA_DWC_DMACR_TXRXCH_CLEAR);
/* Reconfigure the DMA Burst Transaction Size register */
- out_le32(&hsdev->sata_dwc_regs->dbtsr,
- SATA_DWC_DBTSR_MWR(AHB_DMA_BRST_DFLT) |
- SATA_DWC_DBTSR_MRD(AHB_DMA_BRST_DFLT));
+ sata_dwc_writel(&hsdev->sata_dwc_regs->dbtsr,
+ SATA_DWC_DBTSR_MWR(AHB_DMA_BRST_DFLT) |
+ SATA_DWC_DBTSR_MRD(AHB_DMA_BRST_DFLT));
return ret;
}
+static void sata_dwc_dev_select(struct ata_port *ap, unsigned int device)
+{
+ /* SATA DWC is master only */
+}
+
/*
* scsi mid-layer and libata interface structures
*/
@@ -1148,7 +1162,13 @@ static struct scsi_host_template sata_dwc_sht = {
*/
.sg_tablesize = LIBATA_MAX_PRD,
/* .can_queue = ATA_MAX_QUEUE, */
- .dma_boundary = ATA_DMA_BOUNDARY,
+ /*
+ * Make sure a LLI block is not created that will span 8K max FIS
+ * boundary. If the block spans such a FIS boundary, there is a chance
+ * that a DMA burst will cross that boundary -- this results in an
+ * error in the host controller.
+ */
+ .dma_boundary = 0x1fff /* ATA_DMA_BOUNDARY */,
};
static struct ata_port_operations sata_dwc_ops = {
@@ -1157,7 +1177,6 @@ static struct ata_port_operations sata_dwc_ops = {
.error_handler = sata_dwc_error_handler,
.hardreset = sata_dwc_hardreset,
- .qc_prep = sata_dwc_qc_prep,
.qc_issue = sata_dwc_qc_issue,
.scr_read = sata_dwc_scr_read,
@@ -1166,6 +1185,8 @@ static struct ata_port_operations sata_dwc_ops = {
.port_start = sata_dwc_port_start,
.port_stop = sata_dwc_port_stop,
+ .sff_dev_select = sata_dwc_dev_select,
+
.bmdma_setup = sata_dwc_bmdma_setup,
.bmdma_start = sata_dwc_bmdma_start,
};
@@ -1184,13 +1205,14 @@ static int sata_dwc_probe(struct platform_device *ofdev)
struct sata_dwc_device *hsdev;
u32 idr, versionr;
char *ver = (char *)&versionr;
- u8 __iomem *base;
+ void __iomem *base;
int err = 0;
int irq;
struct ata_host *host;
struct ata_port_info pi = sata_dwc_port_info[0];
const struct ata_port_info *ppi[] = { &pi, NULL };
struct device_node *np = ofdev->dev.of_node;
+ struct resource *res;
/* Allocate DWC SATA device */
host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_DWC_MAX_PORTS);
@@ -1201,57 +1223,33 @@ static int sata_dwc_probe(struct platform_device *ofdev)
host->private_data = hsdev;
/* Ioremap SATA registers */
- base = of_iomap(np, 0);
- if (!base) {
+ res = platform_get_resource(ofdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&ofdev->dev, res);
+ if (IS_ERR(base)) {
dev_err(&ofdev->dev,
"ioremap failed for SATA register address\n");
- return -ENODEV;
+ return PTR_ERR(base);
}
- hsdev->reg_base = base;
dev_dbg(&ofdev->dev, "ioremap done for SATA register address\n");
/* Synopsys DWC SATA specific Registers */
- hsdev->sata_dwc_regs = (void *__iomem)(base + SATA_DWC_REG_OFFSET);
+ hsdev->sata_dwc_regs = base + SATA_DWC_REG_OFFSET;
+ hsdev->dmadr = res->start + SATA_DWC_REG_OFFSET + offsetof(struct sata_dwc_regs, dmadr);
/* Setup port */
host->ports[0]->ioaddr.cmd_addr = base;
host->ports[0]->ioaddr.scr_addr = base + SATA_DWC_SCR_OFFSET;
- host_pvt.scr_addr_sstatus = base + SATA_DWC_SCR_OFFSET;
- sata_dwc_setup_port(&host->ports[0]->ioaddr, (unsigned long)base);
+ sata_dwc_setup_port(&host->ports[0]->ioaddr, base);
/* Read the ID and Version Registers */
- idr = in_le32(&hsdev->sata_dwc_regs->idr);
- versionr = in_le32(&hsdev->sata_dwc_regs->versionr);
+ idr = sata_dwc_readl(&hsdev->sata_dwc_regs->idr);
+ versionr = sata_dwc_readl(&hsdev->sata_dwc_regs->versionr);
dev_notice(&ofdev->dev, "id %d, controller version %c.%c%c\n",
idr, ver[0], ver[1], ver[2]);
- /* Get SATA DMA interrupt number */
- hsdev->dma->irq = irq_of_parse_and_map(np, 1);
- if (hsdev->dma->irq == NO_IRQ) {
- dev_err(&ofdev->dev, "no SATA DMA irq\n");
- err = -ENODEV;
- goto error_iomap;
- }
-
- /* Get physical SATA DMA register base address */
- hsdev->dma->regs = of_iomap(np, 1);
- if (!hsdev->dma->regs) {
- dev_err(&ofdev->dev,
- "ioremap failed for AHBDMA register address\n");
- err = -ENODEV;
- goto error_iomap;
- }
-
/* Save dev for later use in dev_xxx() routines */
hsdev->dev = &ofdev->dev;
- hsdev->dma->dev = &ofdev->dev;
-
- /* Initialize AHB DMAC */
- err = dw_dma_probe(hsdev->dma, NULL);
- if (err)
- goto error_dma_iomap;
-
/* Enable SATA Interrupts */
sata_dwc_enable_interrupts(hsdev);
@@ -1263,6 +1261,25 @@ static int sata_dwc_probe(struct platform_device *ofdev)
goto error_out;
}
+#ifdef CONFIG_SATA_DWC_OLD_DMA
+ if (!of_find_property(np, "dmas", NULL)) {
+ err = sata_dwc_dma_init_old(ofdev, hsdev);
+ if (err)
+ goto error_out;
+ }
+#endif
+
+ hsdev->phy = devm_phy_optional_get(hsdev->dev, "sata-phy");
+ if (IS_ERR(hsdev->phy)) {
+ err = PTR_ERR(hsdev->phy);
+ hsdev->phy = NULL;
+ goto error_out;
+ }
+
+ err = phy_init(hsdev->phy);
+ if (err)
+ goto error_out;
+
/*
* Now, register with libATA core, this will also initiate the
* device discovery process, invoking our port_start() handler &
@@ -1276,12 +1293,7 @@ static int sata_dwc_probe(struct platform_device *ofdev)
return 0;
error_out:
- /* Free SATA DMA resources */
- dw_dma_remove(hsdev->dma);
-error_dma_iomap:
- iounmap(hsdev->dma->regs);
-error_iomap:
- iounmap(base);
+ phy_exit(hsdev->phy);
return err;
}
@@ -1293,11 +1305,13 @@ static int sata_dwc_remove(struct platform_device *ofdev)
ata_host_detach(host);
+ phy_exit(hsdev->phy);
+
+#ifdef CONFIG_SATA_DWC_OLD_DMA
/* Free SATA DMA resources */
- dw_dma_remove(hsdev->dma);
+ sata_dwc_dma_exit_old(hsdev);
+#endif
- iounmap(hsdev->dma->regs);
- iounmap(hsdev->reg_base);
dev_dbg(&ofdev->dev, "done\n");
return 0;
}
--
2.8.1
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