@@ -313,14 +313,21 @@ config ATA_PIIX
config SATA_DWC
tristate "DesignWare Cores SATA support"
- depends on 460EX
- select DW_DMAC_CORE
help
This option enables support for the on-chip SATA controller of the
AppliedMicro processor 460EX.
If unsure, say N.
+config SATA_DWC_OLD_DMA
+ bool "Support old device trees"
+ depends on SATA_DWC
+ select DW_DMAC_CORE
+ default y if 460EX
+ help
+ This option enables support for old device trees without the
+ "dmas" property.
+
config SATA_DWC_DEBUG
bool "Debugging driver version"
depends on SATA_DWC
@@ -30,6 +30,7 @@
#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>
@@ -42,10 +43,6 @@
#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
@@ -148,7 +145,9 @@ struct sata_dwc_device {
struct ata_host *host;
u8 __iomem *reg_base;
struct sata_dwc_regs *sata_dwc_regs; /* DW Synopsys SATA specific */
+#ifdef CONFIG_SATA_DWC_OLD_DMA
struct dw_dma_chip *dma;
+#endif
};
#define SATA_DWC_QCMD_MAX 32
@@ -159,7 +158,6 @@ 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;
@@ -198,13 +196,6 @@ struct sata_dwc_host_priv {
static struct sata_dwc_host_priv host_pvt;
-static struct dw_dma_slave sata_dwc_dma_dws = {
- .src_id = 0,
- .dst_id = 0,
- .m_master = 1,
- .p_master = 0,
-};
-
/*
* Prototypes
*/
@@ -215,6 +206,99 @@ 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;
+ int err;
+
+ 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 */
+ hsdev->dma->regs = of_iomap(np, 1);
+ if (!hsdev->dma->regs) {
+ dev_err(&pdev->dev,
+ "ioremap failed for AHBDMA register address\n");
+ return -ENODEV;
+ }
+
+ /* Initialize AHB DMAC */
+ err = dw_dma_probe(hsdev->dma);
+ if (err) {
+ iounmap(hsdev->dma->regs);
+ return err;
+ }
+
+ return 0;
+}
+
+static void sata_dwc_dma_exit_old(struct sata_dwc_device *hsdev)
+{
+ if (!hsdev->dma)
+ return;
+
+ dw_dma_remove(hsdev->dma);
+ iounmap(hsdev->dma->regs);
+}
+
+#endif
+
static const char *get_prot_descript(u8 protocol)
{
switch ((enum ata_tf_protocols)protocol) {
@@ -783,18 +867,6 @@ static void sata_dwc_enable_interrupts(struct sata_dwc_device *hsdev)
in_le32(&hsdev->sata_dwc_regs->errmr));
}
-static bool sata_dwc_dma_filter(struct dma_chan *chan, void *param)
-{
- struct sata_dwc_device_port *hsdevp = param;
- struct dw_dma_slave *dws = hsdevp->dws;
-
- if (dws->dma_dev != chan->device->dev)
- return false;
-
- chan->private = dws;
- return true;
-}
-
static void sata_dwc_setup_port(struct ata_ioports *port, unsigned long base)
{
port->cmd_addr = (void __iomem *)base + 0x00;
@@ -817,6 +889,26 @@ static void sata_dwc_setup_port(struct ata_ioports *port, unsigned long base)
port->ctl_addr = (void __iomem *)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;
+
+#ifdef CONFIG_SATA_DWC_OLD_DMA
+ if (!of_find_property(dev->of_node, "dmas", NULL))
+ return sata_dwc_dma_get_channel_old(hsdevp);
+#endif
+
+ 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);
+ }
+
+ return 0;
+}
+
/*
* Function : sata_dwc_port_start
* arguments : struct ata_ioports *port
@@ -829,7 +921,6 @@ 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 +944,9 @@ 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);
-
- /* 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 = sata_dwc_dma_get_channel(hsdevp);
+ if (err)
goto CLEANUP_ALLOC;
- }
for (i = 0; i < SATA_DWC_QCMD_MAX; i++)
hsdevp->cmd_issued[i] = SATA_DWC_CMD_ISSUED_NOT;
@@ -1219,33 +1299,9 @@ static int sata_dwc_probe(struct platform_device *ofdev)
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);
- if (err)
- goto error_dma_iomap;
-
/* Enable SATA Interrupts */
sata_dwc_enable_interrupts(hsdev);
@@ -1257,6 +1313,14 @@ 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
+
/*
* Now, register with libATA core, this will also initiate the
* device discovery process, invoking our port_start() handler &
@@ -1270,11 +1334,6 @@ 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);
return err;
}
@@ -1287,10 +1346,11 @@ static int sata_dwc_remove(struct platform_device *ofdev)
ata_host_detach(host);
+#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;