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path: root/drivers/dma/imx-dma.c
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Diffstat (limited to 'drivers/dma/imx-dma.c')
-rw-r--r--drivers/dma/imx-dma.c137
1 files changed, 80 insertions, 57 deletions
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index 7d9554cc497..dbf0e6f8de8 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -29,7 +29,6 @@
#include <asm/irq.h>
#include <linux/platform_data/dma-imx.h>
-#include <mach/hardware.h>
#include "dmaengine.h"
#define IMXDMA_MAX_CHAN_DESCRIPTORS 16
@@ -167,6 +166,12 @@ struct imxdma_channel {
int slot_2d;
};
+enum imx_dma_type {
+ IMX1_DMA,
+ IMX21_DMA,
+ IMX27_DMA,
+};
+
struct imxdma_engine {
struct device *dev;
struct device_dma_parameters dma_parms;
@@ -177,7 +182,39 @@ struct imxdma_engine {
spinlock_t lock;
struct imx_dma_2d_config slots_2d[IMX_DMA_2D_SLOTS];
struct imxdma_channel channel[IMX_DMA_CHANNELS];
+ enum imx_dma_type devtype;
+};
+
+static struct platform_device_id imx_dma_devtype[] = {
+ {
+ .name = "imx1-dma",
+ .driver_data = IMX1_DMA,
+ }, {
+ .name = "imx21-dma",
+ .driver_data = IMX21_DMA,
+ }, {
+ .name = "imx27-dma",
+ .driver_data = IMX27_DMA,
+ }, {
+ /* sentinel */
+ }
};
+MODULE_DEVICE_TABLE(platform, imx_dma_devtype);
+
+static inline int is_imx1_dma(struct imxdma_engine *imxdma)
+{
+ return imxdma->devtype == IMX1_DMA;
+}
+
+static inline int is_imx21_dma(struct imxdma_engine *imxdma)
+{
+ return imxdma->devtype == IMX21_DMA;
+}
+
+static inline int is_imx27_dma(struct imxdma_engine *imxdma)
+{
+ return imxdma->devtype == IMX27_DMA;
+}
static struct imxdma_channel *to_imxdma_chan(struct dma_chan *chan)
{
@@ -212,7 +249,9 @@ static unsigned imx_dmav1_readl(struct imxdma_engine *imxdma, unsigned offset)
static int imxdma_hw_chain(struct imxdma_channel *imxdmac)
{
- if (cpu_is_mx27())
+ struct imxdma_engine *imxdma = imxdmac->imxdma;
+
+ if (is_imx27_dma(imxdma))
return imxdmac->hw_chaining;
else
return 0;
@@ -267,7 +306,7 @@ static void imxdma_enable_hw(struct imxdma_desc *d)
imx_dmav1_writel(imxdma, imx_dmav1_readl(imxdma, DMA_CCR(channel)) |
CCR_CEN | CCR_ACRPT, DMA_CCR(channel));
- if ((cpu_is_mx21() || cpu_is_mx27()) &&
+ if (!is_imx1_dma(imxdma) &&
d->sg && imxdma_hw_chain(imxdmac)) {
d->sg = sg_next(d->sg);
if (d->sg) {
@@ -436,7 +475,7 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id)
struct imxdma_engine *imxdma = dev_id;
int i, disr;
- if (cpu_is_mx21() || cpu_is_mx27())
+ if (!is_imx1_dma(imxdma))
imxdma_err_handler(irq, dev_id);
disr = imx_dmav1_readl(imxdma, DMA_DISR);
@@ -961,35 +1000,32 @@ static void imxdma_issue_pending(struct dma_chan *chan)
static int __init imxdma_probe(struct platform_device *pdev)
{
struct imxdma_engine *imxdma;
+ struct resource *res;
int ret, i;
+ int irq, irq_err;
-
- imxdma = kzalloc(sizeof(*imxdma), GFP_KERNEL);
+ imxdma = devm_kzalloc(&pdev->dev, sizeof(*imxdma), GFP_KERNEL);
if (!imxdma)
return -ENOMEM;
- if (cpu_is_mx1()) {
- imxdma->base = MX1_IO_ADDRESS(MX1_DMA_BASE_ADDR);
- } else if (cpu_is_mx21()) {
- imxdma->base = MX21_IO_ADDRESS(MX21_DMA_BASE_ADDR);
- } else if (cpu_is_mx27()) {
- imxdma->base = MX27_IO_ADDRESS(MX27_DMA_BASE_ADDR);
- } else {
- kfree(imxdma);
- return 0;
- }
+ imxdma->devtype = pdev->id_entry->driver_data;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ imxdma->base = devm_request_and_ioremap(&pdev->dev, res);
+ if (!imxdma->base)
+ return -EADDRNOTAVAIL;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
imxdma->dma_ipg = devm_clk_get(&pdev->dev, "ipg");
- if (IS_ERR(imxdma->dma_ipg)) {
- ret = PTR_ERR(imxdma->dma_ipg);
- goto err_clk;
- }
+ if (IS_ERR(imxdma->dma_ipg))
+ return PTR_ERR(imxdma->dma_ipg);
imxdma->dma_ahb = devm_clk_get(&pdev->dev, "ahb");
- if (IS_ERR(imxdma->dma_ahb)) {
- ret = PTR_ERR(imxdma->dma_ahb);
- goto err_clk;
- }
+ if (IS_ERR(imxdma->dma_ahb))
+ return PTR_ERR(imxdma->dma_ahb);
clk_prepare_enable(imxdma->dma_ipg);
clk_prepare_enable(imxdma->dma_ahb);
@@ -997,18 +1033,25 @@ static int __init imxdma_probe(struct platform_device *pdev)
/* reset DMA module */
imx_dmav1_writel(imxdma, DCR_DRST, DMA_DCR);
- if (cpu_is_mx1()) {
- ret = request_irq(MX1_DMA_INT, dma_irq_handler, 0, "DMA", imxdma);
+ if (is_imx1_dma(imxdma)) {
+ ret = devm_request_irq(&pdev->dev, irq,
+ dma_irq_handler, 0, "DMA", imxdma);
if (ret) {
dev_warn(imxdma->dev, "Can't register IRQ for DMA\n");
- goto err_enable;
+ goto err;
+ }
+
+ irq_err = platform_get_irq(pdev, 1);
+ if (irq_err < 0) {
+ ret = irq_err;
+ goto err;
}
- ret = request_irq(MX1_DMA_ERR, imxdma_err_handler, 0, "DMA", imxdma);
+ ret = devm_request_irq(&pdev->dev, irq_err,
+ imxdma_err_handler, 0, "DMA", imxdma);
if (ret) {
dev_warn(imxdma->dev, "Can't register ERRIRQ for DMA\n");
- free_irq(MX1_DMA_INT, NULL);
- goto err_enable;
+ goto err;
}
}
@@ -1038,14 +1081,14 @@ static int __init imxdma_probe(struct platform_device *pdev)
for (i = 0; i < IMX_DMA_CHANNELS; i++) {
struct imxdma_channel *imxdmac = &imxdma->channel[i];
- if (cpu_is_mx21() || cpu_is_mx27()) {
- ret = request_irq(MX2x_INT_DMACH0 + i,
+ if (!is_imx1_dma(imxdma)) {
+ ret = devm_request_irq(&pdev->dev, irq + i,
dma_irq_handler, 0, "DMA", imxdma);
if (ret) {
dev_warn(imxdma->dev, "Can't register IRQ %d "
"for DMA channel %d\n",
- MX2x_INT_DMACH0 + i, i);
- goto err_init;
+ irq + i, i);
+ goto err;
}
init_timer(&imxdmac->watchdog);
imxdmac->watchdog.function = &imxdma_watchdog;
@@ -1091,46 +1134,25 @@ static int __init imxdma_probe(struct platform_device *pdev)
ret = dma_async_device_register(&imxdma->dma_device);
if (ret) {
dev_err(&pdev->dev, "unable to register\n");
- goto err_init;
+ goto err;
}
return 0;
-err_init:
-
- if (cpu_is_mx21() || cpu_is_mx27()) {
- while (--i >= 0)
- free_irq(MX2x_INT_DMACH0 + i, NULL);
- } else if cpu_is_mx1() {
- free_irq(MX1_DMA_INT, NULL);
- free_irq(MX1_DMA_ERR, NULL);
- }
-err_enable:
+err:
clk_disable_unprepare(imxdma->dma_ipg);
clk_disable_unprepare(imxdma->dma_ahb);
-err_clk:
- kfree(imxdma);
return ret;
}
static int __exit imxdma_remove(struct platform_device *pdev)
{
struct imxdma_engine *imxdma = platform_get_drvdata(pdev);
- int i;
dma_async_device_unregister(&imxdma->dma_device);
- if (cpu_is_mx21() || cpu_is_mx27()) {
- for (i = 0; i < IMX_DMA_CHANNELS; i++)
- free_irq(MX2x_INT_DMACH0 + i, NULL);
- } else if cpu_is_mx1() {
- free_irq(MX1_DMA_INT, NULL);
- free_irq(MX1_DMA_ERR, NULL);
- }
-
clk_disable_unprepare(imxdma->dma_ipg);
clk_disable_unprepare(imxdma->dma_ahb);
- kfree(imxdma);
return 0;
}
@@ -1139,6 +1161,7 @@ static struct platform_driver imxdma_driver = {
.driver = {
.name = "imx-dma",
},
+ .id_table = imx_dma_devtype,
.remove = __exit_p(imxdma_remove),
};
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 15:00:12 +0000