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-rw-r--r--arch/sh/include/asm/dma-sh.h13
-rw-r--r--arch/sh/kernel/cpu/sh4a/setup-sh7722.c70
-rw-r--r--arch/sh/kernel/cpu/sh4a/setup-sh7724.c159
-rw-r--r--arch/sh/kernel/cpu/sh4a/setup-sh7780.c113
-rw-r--r--arch/sh/kernel/cpu/sh4a/setup-sh7785.c113
-rw-r--r--drivers/dma/shdma.c318
-rw-r--r--drivers/dma/shdma.h6
7 files changed, 636 insertions, 156 deletions
diff --git a/arch/sh/include/asm/dma-sh.h b/arch/sh/include/asm/dma-sh.h
index e934a2e6665..2e3631d6e27 100644
--- a/arch/sh/include/asm/dma-sh.h
+++ b/arch/sh/include/asm/dma-sh.h
@@ -154,10 +154,17 @@ struct sh_dmae_slave_config {
char mid_rid;
};
+struct sh_dmae_channel {
+ unsigned int offset;
+ unsigned int dmars;
+ unsigned int dmars_bit;
+};
+
struct sh_dmae_pdata {
- unsigned int mode;
- struct sh_dmae_slave_config *config;
- int config_num;
+ struct sh_dmae_slave_config *slave;
+ int slave_num;
+ struct sh_dmae_channel *channel;
+ int channel_num;
};
struct device;
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
index 538280a3dc6..aec182bed8a 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
@@ -75,15 +75,79 @@ static struct sh_dmae_slave_config sh7722_dmae_slaves[] = {
},
};
+static struct sh_dmae_channel sh7722_dmae_channels[] = {
+ {
+ .offset = 0,
+ .dmars = 0,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x10,
+ .dmars = 0,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x20,
+ .dmars = 4,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x30,
+ .dmars = 4,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x50,
+ .dmars = 8,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x60,
+ .dmars = 8,
+ .dmars_bit = 8,
+ }
+};
+
static struct sh_dmae_pdata dma_platform_data = {
- .mode = 0,
- .config = sh7722_dmae_slaves,
- .config_num = ARRAY_SIZE(sh7722_dmae_slaves),
+ .slave = sh7722_dmae_slaves,
+ .slave_num = ARRAY_SIZE(sh7722_dmae_slaves),
+ .channel = sh7722_dmae_channels,
+ .channel_num = ARRAY_SIZE(sh7722_dmae_channels),
+};
+
+static struct resource sh7722_dmae_resources[] = {
+ [0] = {
+ /* Channel registers and DMAOR */
+ .start = 0xfe008020,
+ .end = 0xfe00808f,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ /* DMARSx */
+ .start = 0xfe009000,
+ .end = 0xfe00900b,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ /* DMA error IRQ */
+ .start = 78,
+ .end = 78,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ /* IRQ for channels 0-3 */
+ .start = 48,
+ .end = 51,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ /* IRQ for channels 4-5 */
+ .start = 76,
+ .end = 77,
+ .flags = IORESOURCE_IRQ,
+ },
};
struct platform_device dma_device = {
.name = "sh-dma-engine",
.id = -1,
+ .resource = sh7722_dmae_resources,
+ .num_resources = ARRAY_SIZE(sh7722_dmae_resources),
.dev = {
.platform_data = &dma_platform_data,
},
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index 31e3451f7e3..aca1fb2c571 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -28,15 +28,157 @@
#include <cpu/sh7724.h>
/* DMA */
-static struct sh_dmae_pdata dma_platform_data = {
- .mode = SHDMA_DMAOR1,
+static struct sh_dmae_channel sh7724_dmae0_channels[] = {
+ {
+ .offset = 0,
+ .dmars = 0,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x10,
+ .dmars = 0,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x20,
+ .dmars = 4,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x30,
+ .dmars = 4,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x50,
+ .dmars = 8,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x60,
+ .dmars = 8,
+ .dmars_bit = 8,
+ }
+};
+
+static struct sh_dmae_channel sh7724_dmae1_channels[] = {
+ {
+ .offset = 0,
+ .dmars = 0,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x10,
+ .dmars = 0,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x20,
+ .dmars = 4,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x30,
+ .dmars = 4,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x50,
+ .dmars = 8,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x60,
+ .dmars = 8,
+ .dmars_bit = 8,
+ }
+};
+
+static struct sh_dmae_pdata dma0_platform_data = {
+ .channel = sh7724_dmae0_channels,
+ .channel_num = ARRAY_SIZE(sh7724_dmae0_channels),
+};
+
+static struct sh_dmae_pdata dma1_platform_data = {
+ .channel = sh7724_dmae1_channels,
+ .channel_num = ARRAY_SIZE(sh7724_dmae1_channels),
+};
+
+/* Resource order important! */
+static struct resource sh7724_dmae0_resources[] = {
+ {
+ /* Channel registers and DMAOR */
+ .start = 0xfe008020,
+ .end = 0xfe00808f,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ /* DMARSx */
+ .start = 0xfe009000,
+ .end = 0xfe00900b,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ /* DMA error IRQ */
+ .start = 78,
+ .end = 78,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ /* IRQ for channels 0-3 */
+ .start = 48,
+ .end = 51,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ /* IRQ for channels 4-5 */
+ .start = 76,
+ .end = 77,
+ .flags = IORESOURCE_IRQ,
+ },
};
-static struct platform_device dma_device = {
- .name = "sh-dma-engine",
- .id = -1,
- .dev = {
- .platform_data = &dma_platform_data,
+/* Resource order important! */
+static struct resource sh7724_dmae1_resources[] = {
+ {
+ /* Channel registers and DMAOR */
+ .start = 0xfdc08020,
+ .end = 0xfdc0808f,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ /* DMARSx */
+ .start = 0xfdc09000,
+ .end = 0xfdc0900b,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ /* DMA error IRQ */
+ .start = 74,
+ .end = 74,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ /* IRQ for channels 0-3 */
+ .start = 40,
+ .end = 43,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ /* IRQ for channels 4-5 */
+ .start = 72,
+ .end = 73,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device dma0_device = {
+ .name = "sh-dma-engine",
+ .id = 0,
+ .resource = sh7724_dmae0_resources,
+ .num_resources = ARRAY_SIZE(sh7724_dmae0_resources),
+ .dev = {
+ .platform_data = &dma0_platform_data,
+ },
+};
+
+static struct platform_device dma1_device = {
+ .name = "sh-dma-engine",
+ .id = 1,
+ .resource = sh7724_dmae1_resources,
+ .num_resources = ARRAY_SIZE(sh7724_dmae1_resources),
+ .dev = {
+ .platform_data = &dma1_platform_data,
},
};
@@ -663,7 +805,8 @@ static struct platform_device *sh7724_devices[] __initdata = {
&tmu3_device,
&tmu4_device,
&tmu5_device,
- &dma_device,
+ &dma0_device,
+ &dma1_device,
&rtc_device,
&iic0_device,
&iic1_device,
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
index f8f21618d78..338dfc2c2bb 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
@@ -247,15 +247,115 @@ static struct platform_device rtc_device = {
.resource = rtc_resources,
};
-static struct sh_dmae_pdata dma_platform_data = {
- .mode = (SHDMA_MIX_IRQ | SHDMA_DMAOR1),
+/* DMA */
+static struct sh_dmae_channel sh7780_dmae0_channels[] = {
+ {
+ .offset = 0,
+ .dmars = 0,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x10,
+ .dmars = 0,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x20,
+ .dmars = 4,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x30,
+ .dmars = 4,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x50,
+ .dmars = 8,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x60,
+ .dmars = 8,
+ .dmars_bit = 8,
+ }
+};
+
+static struct sh_dmae_channel sh7780_dmae1_channels[] = {
+ {
+ .offset = 0,
+ }, {
+ .offset = 0x10,
+ }, {
+ .offset = 0x20,
+ }, {
+ .offset = 0x30,
+ }, {
+ .offset = 0x50,
+ }, {
+ .offset = 0x60,
+ }
+};
+
+static struct sh_dmae_pdata dma0_platform_data = {
+ .channel = sh7780_dmae0_channels,
+ .channel_num = ARRAY_SIZE(sh7780_dmae0_channels),
+};
+
+static struct sh_dmae_pdata dma1_platform_data = {
+ .channel = sh7780_dmae1_channels,
+ .channel_num = ARRAY_SIZE(sh7780_dmae1_channels),
+};
+
+static struct resource sh7780_dmae0_resources[] = {
+ [0] = {
+ /* Channel registers and DMAOR */
+ .start = 0xfc808020,
+ .end = 0xfc80808f,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ /* DMARSx */
+ .start = 0xfc809000,
+ .end = 0xfc80900b,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ /* Real DMA error IRQ is 38, and channel IRQs are 34-37, 44-45 */
+ .start = 34,
+ .end = 34,
+ .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE,
+ },
+};
+
+static struct resource sh7780_dmae1_resources[] = {
+ [0] = {
+ /* Channel registers and DMAOR */
+ .start = 0xfc818020,
+ .end = 0xfc81808f,
+ .flags = IORESOURCE_MEM,
+ },
+ /* DMAC1 has no DMARS */
+ {
+ /* Real DMA error IRQ is 38, and channel IRQs are 46-47, 92-95 */
+ .start = 46,
+ .end = 46,
+ .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE,
+ },
};
-static struct platform_device dma_device = {
+static struct platform_device dma0_device = {
.name = "sh-dma-engine",
- .id = -1,
+ .id = 0,
+ .resource = sh7780_dmae0_resources,
+ .num_resources = ARRAY_SIZE(sh7780_dmae0_resources),
.dev = {
- .platform_data = &dma_platform_data,
+ .platform_data = &dma0_platform_data,
+ },
+};
+
+static struct platform_device dma1_device = {
+ .name = "sh-dma-engine",
+ .id = 1,
+ .resource = sh7780_dmae1_resources,
+ .num_resources = ARRAY_SIZE(sh7780_dmae1_resources),
+ .dev = {
+ .platform_data = &dma1_platform_data,
},
};
@@ -269,7 +369,8 @@ static struct platform_device *sh7780_devices[] __initdata = {
&tmu4_device,
&tmu5_device,
&rtc_device,
- &dma_device,
+ &dma0_device,
+ &dma1_device,
};
static int __init sh7780_devices_setup(void)
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
index 23448d8c671..fbb5d1f51f1 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
@@ -295,15 +295,115 @@ static struct platform_device tmu5_device = {
.num_resources = ARRAY_SIZE(tmu5_resources),
};
-static struct sh_dmae_pdata dma_platform_data = {
- .mode = (SHDMA_MIX_IRQ | SHDMA_DMAOR1),
+/* DMA */
+static struct sh_dmae_channel sh7785_dmae0_channels[] = {
+ {
+ .offset = 0,
+ .dmars = 0,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x10,
+ .dmars = 0,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x20,
+ .dmars = 4,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x30,
+ .dmars = 4,
+ .dmars_bit = 8,
+ }, {
+ .offset = 0x50,
+ .dmars = 8,
+ .dmars_bit = 0,
+ }, {
+ .offset = 0x60,
+ .dmars = 8,
+ .dmars_bit = 8,
+ }
+};
+
+static struct sh_dmae_channel sh7785_dmae1_channels[] = {
+ {
+ .offset = 0,
+ }, {
+ .offset = 0x10,
+ }, {
+ .offset = 0x20,
+ }, {
+ .offset = 0x30,
+ }, {
+ .offset = 0x50,
+ }, {
+ .offset = 0x60,
+ }
+};
+
+static struct sh_dmae_pdata dma0_platform_data = {
+ .channel = sh7785_dmae0_channels,
+ .channel_num = ARRAY_SIZE(sh7785_dmae0_channels),
+};
+
+static struct sh_dmae_pdata dma1_platform_data = {
+ .channel = sh7785_dmae1_channels,
+ .channel_num = ARRAY_SIZE(sh7785_dmae1_channels),
+};
+
+static struct resource sh7785_dmae0_resources[] = {
+ [0] = {
+ /* Channel registers and DMAOR */
+ .start = 0xfc808020,
+ .end = 0xfc80808f,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ /* DMARSx */
+ .start = 0xfc809000,
+ .end = 0xfc80900b,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ /* Real DMA error IRQ is 39, and channel IRQs are 33-38 */
+ .start = 33,
+ .end = 33,
+ .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE,
+ },
+};
+
+static struct resource sh7785_dmae1_resources[] = {
+ [0] = {
+ /* Channel registers and DMAOR */
+ .start = 0xfcc08020,
+ .end = 0xfcc0808f,
+ .flags = IORESOURCE_MEM,
+ },
+ /* DMAC1 has no DMARS */
+ {
+ /* Real DMA error IRQ is 58, and channel IRQs are 52-57 */
+ .start = 52,
+ .end = 52,
+ .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_SHAREABLE,
+ },
};
-static struct platform_device dma_device = {
+static struct platform_device dma0_device = {
.name = "sh-dma-engine",
- .id = -1,
+ .id = 0,
+ .resource = sh7785_dmae0_resources,
+ .num_resources = ARRAY_SIZE(sh7785_dmae0_resources),
.dev = {
- .platform_data = &dma_platform_data,
+ .platform_data = &dma0_platform_data,
+ },
+};
+
+static struct platform_device dma1_device = {
+ .name = "sh-dma-engine",
+ .id = 1,
+ .resource = sh7785_dmae1_resources,
+ .num_resources = ARRAY_SIZE(sh7785_dmae1_resources),
+ .dev = {
+ .platform_data = &dma1_platform_data,
},
};
@@ -320,7 +420,8 @@ static struct platform_device *sh7785_devices[] __initdata = {
&tmu3_device,
&tmu4_device,
&tmu5_device,
- &dma_device,
+ &dma0_device,
+ &dma1_device,
};
static int __init sh7785_devices_setup(void)
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 77311698c04..ab12fa5a129 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -53,15 +53,24 @@ static unsigned long sh_dmae_slave_used[BITS_TO_LONGS(SHDMA_SLAVE_NUMBER)];
static void sh_dmae_chan_ld_cleanup(struct sh_dmae_chan *sh_chan, bool all);
-#define SH_DMAC_CHAN_BASE(id) (dma_base_addr[id])
static void sh_dmae_writel(struct sh_dmae_chan *sh_dc, u32 data, u32 reg)
{
- ctrl_outl(data, SH_DMAC_CHAN_BASE(sh_dc->id) + reg);
+ __raw_writel(data, sh_dc->base + reg / sizeof(u32));
}
static u32 sh_dmae_readl(struct sh_dmae_chan *sh_dc, u32 reg)
{
- return ctrl_inl(SH_DMAC_CHAN_BASE(sh_dc->id) + reg);
+ return __raw_readl(sh_dc->base + reg / sizeof(u32));
+}
+
+static u16 dmaor_read(struct sh_dmae_device *shdev)
+{
+ return __raw_readw(shdev->chan_reg + DMAOR / sizeof(u32));
+}
+
+static void dmaor_write(struct sh_dmae_device *shdev, u16 data)
+{
+ __raw_writew(data, shdev->chan_reg + DMAOR / sizeof(u32));
}
/*
@@ -69,23 +78,22 @@ static u32 sh_dmae_readl(struct sh_dmae_chan *sh_dc, u32 reg)
*
* SH7780 has two DMAOR register
*/
-static void sh_dmae_ctl_stop(int id)
+static void sh_dmae_ctl_stop(struct sh_dmae_device *shdev)
{
- unsigned short dmaor = dmaor_read_reg(id);
+ unsigned short dmaor = dmaor_read(shdev);
- dmaor &= ~(DMAOR_NMIF | DMAOR_AE | DMAOR_DME);
- dmaor_write_reg(id, dmaor);
+ dmaor_write(shdev, dmaor & ~(DMAOR_NMIF | DMAOR_AE | DMAOR_DME));
}
-static int sh_dmae_rst(int id)
+static int sh_dmae_rst(struct sh_dmae_device *shdev)
{
unsigned short dmaor;
- sh_dmae_ctl_stop(id);
- dmaor = dmaor_read_reg(id) | DMAOR_INIT;
+ sh_dmae_ctl_stop(shdev);
+ dmaor = dmaor_read(shdev) | DMAOR_INIT;
- dmaor_write_reg(id, dmaor);
- if (dmaor_read_reg(id) & (DMAOR_AE | DMAOR_NMIF)) {
+ dmaor_write(shdev, dmaor);
+ if (dmaor_read(shdev) & (DMAOR_AE | DMAOR_NMIF)) {
pr_warning("dma-sh: Can't initialize DMAOR.\n");
return -EINVAL;
}
@@ -153,31 +161,20 @@ static int dmae_set_chcr(struct sh_dmae_chan *sh_chan, u32 val)
return 0;
}
-#define DMARS_SHIFT 8
-#define DMARS_CHAN_MSK 0x01
static int dmae_set_dmars(struct sh_dmae_chan *sh_chan, u16 val)
{
- u32 addr;
- int shift = 0;
+ struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
+ struct sh_dmae_device, common);
+ struct sh_dmae_pdata *pdata = shdev->pdata;
+ struct sh_dmae_channel *chan_pdata = &pdata->channel[sh_chan->id];
+ u16 __iomem *addr = shdev->dmars + chan_pdata->dmars / sizeof(u16);
+ int shift = chan_pdata->dmars_bit;
if (dmae_is_busy(sh_chan))
return -EBUSY;
- if (sh_chan->id & DMARS_CHAN_MSK)
- shift = DMARS_SHIFT;
-
- if (sh_chan->id < 6)
- /* DMA0RS0 - DMA0RS2 */
- addr = SH_DMARS_BASE0 + (sh_chan->id / 2) * 4;
-#ifdef SH_DMARS_BASE1
- else if (sh_chan->id < 12)
- /* DMA1RS0 - DMA1RS2 */
- addr = SH_DMARS_BASE1 + ((sh_chan->id - 6) / 2) * 4;
-#endif
- else
- return -EINVAL;
-
- ctrl_outw((val << shift) | (ctrl_inw(addr) & (0xFF00 >> shift)), addr);
+ __raw_writew((__raw_readw(addr) & (0xff00 >> shift)) | (val << shift),
+ addr);
return 0;
}
@@ -251,15 +248,15 @@ static struct sh_dmae_slave_config *sh_dmae_find_slave(
struct dma_device *dma_dev = sh_chan->common.device;
struct sh_dmae_device *shdev = container_of(dma_dev,
struct sh_dmae_device, common);
- struct sh_dmae_pdata *pdata = &shdev->pdata;
+ struct sh_dmae_pdata *pdata = shdev->pdata;
int i;
if ((unsigned)slave_id >= SHDMA_SLAVE_NUMBER)
return NULL;
- for (i = 0; i < pdata->config_num; i++)
- if (pdata->config[i].slave_id == slave_id)
- return pdata->config + i;
+ for (i = 0; i < pdata->slave_num; i++)
+ if (pdata->slave[i].slave_id == slave_id)
+ return pdata->slave + i;
return NULL;
}
@@ -757,9 +754,7 @@ static irqreturn_t sh_dmae_err(int irq, void *data)
int i;
/* halt the dma controller */
- sh_dmae_ctl_stop(0);
- if (shdev->pdata.mode & SHDMA_DMAOR1)
- sh_dmae_ctl_stop(1);
+ sh_dmae_ctl_stop(shdev);
/* We cannot detect, which channel caused the error, have to reset all */
for (i = 0; i < MAX_DMA_CHANNELS; i++) {
@@ -778,9 +773,7 @@ static irqreturn_t sh_dmae_err(int irq, void *data)
list_splice_init(&sh_chan->ld_queue, &sh_chan->ld_free);
}
}
- sh_dmae_rst(0);
- if (shdev->pdata.mode & SHDMA_DMAOR1)
- sh_dmae_rst(1);
+ sh_dmae_rst(shdev);
return IRQ_HANDLED;
}
@@ -813,19 +806,12 @@ static void dmae_do_tasklet(unsigned long data)
sh_dmae_chan_ld_cleanup(sh_chan, false);
}
-static unsigned int get_dmae_irq(unsigned int id)
-{
- unsigned int irq = 0;
- if (id < ARRAY_SIZE(dmte_irq_map))
- irq = dmte_irq_map[id];
- return irq;
-}
-
-static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
+static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id,
+ int irq, unsigned long flags)
{
int err;
- unsigned int irq = get_dmae_irq(id);
- unsigned long irqflags = IRQF_DISABLED;
+ struct sh_dmae_channel *chan_pdata = &shdev->pdata->channel[id];
+ struct platform_device *pdev = to_platform_device(shdev->common.dev);
struct sh_dmae_chan *new_sh_chan;
/* alloc channel */
@@ -838,6 +824,8 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
new_sh_chan->dev = shdev->common.dev;
new_sh_chan->id = id;
+ new_sh_chan->irq = irq;
+ new_sh_chan->base = shdev->chan_reg + chan_pdata->offset / sizeof(u32);
/* Init DMA tasklet */
tasklet_init(&new_sh_chan->tasklet, dmae_do_tasklet,
@@ -860,21 +848,15 @@ static int __devinit sh_dmae_chan_probe(struct sh_dmae_device *shdev, int id)
&shdev->common.channels);
shdev->common.chancnt++;
- if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
- irqflags = IRQF_SHARED;
-#if defined(DMTE6_IRQ)
- if (irq >= DMTE6_IRQ)
- irq = DMTE6_IRQ;
- else
-#endif
- irq = DMTE0_IRQ;
- }
-
- snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
- "sh-dmae%d", new_sh_chan->id);
+ if (pdev->id >= 0)
+ snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
+ "sh-dmae%d.%d", pdev->id, new_sh_chan->id);
+ else
+ snprintf(new_sh_chan->dev_id, sizeof(new_sh_chan->dev_id),
+ "sh-dma%d", new_sh_chan->id);
/* set up channel irq */
- err = request_irq(irq, &sh_dmae_interrupt, irqflags,
+ err = request_irq(irq, &sh_dmae_interrupt, flags,
new_sh_chan->dev_id, new_sh_chan);
if (err) {
dev_err(shdev->common.dev, "DMA channel %d request_irq error "
@@ -898,12 +880,12 @@ static void sh_dmae_chan_remove(struct sh_dmae_device *shdev)
for (i = shdev->common.chancnt - 1 ; i >= 0 ; i--) {
if (shdev->chan[i]) {
- struct sh_dmae_chan *shchan = shdev->chan[i];
- if (!(shdev->pdata.mode & SHDMA_MIX_IRQ))
- free_irq(dmte_irq_map[i], shchan);
+ struct sh_dmae_chan *sh_chan = shdev->chan[i];
+
+ free_irq(sh_chan->irq, sh_chan);
- list_del(&shchan->common.device_node);
- kfree(shchan);
+ list_del(&sh_chan->common.device_node);
+ kfree(sh_chan);
shdev->chan[i] = NULL;
}
}
@@ -912,47 +894,81 @@ static void sh_dmae_chan_remove(struct sh_dmae_device *shdev)
static int __init sh_dmae_probe(struct platform_device *pdev)
{
- int err = 0, cnt, ecnt;
- unsigned long irqflags = IRQF_DISABLED;
-#if defined(CONFIG_CPU_SH4)
- int eirq[] = { DMAE0_IRQ,
-#if defined(DMAE1_IRQ)
- DMAE1_IRQ
-#endif
- };
-#endif
+ struct sh_dmae_pdata *pdata = pdev->dev.platform_data;
+ unsigned long irqflags = IRQF_DISABLED,
+ chan_flag[MAX_DMA_CHANNELS] = {};
+ int errirq, chan_irq[MAX_DMA_CHANNELS];
+ int err, i, irq_cnt = 0, irqres = 0;
struct sh_dmae_device *shdev;
+ struct resource *chan, *dmars, *errirq_res, *chanirq_res;
/* get platform data */
- if (!pdev->dev.platform_data)
+ if (!pdata || !pdata->channel_num)
return -ENODEV;
+ chan = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ /* DMARS area is optional, if absent, this controller cannot do slave DMA */
+ dmars = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ /*
+ * IRQ resources:
+ * 1. there always must be at least one IRQ IO-resource. On SH4 it is
+ * the error IRQ, in which case it is the only IRQ in this resource:
+ * start == end. If it is the only IRQ resource, all channels also
+ * use the same IRQ.
+ * 2. DMA channel IRQ resources can be specified one per resource or in
+ * ranges (start != end)
+ * 3. iff all events (channels and, optionally, error) on this
+ * controller use the same IRQ, only one IRQ resource can be
+ * specified, otherwise there must be one IRQ per channel, even if
+ * some of them are equal
+ * 4. if all IRQs on this controller are equal or if some specific IRQs
+ * specify IORESOURCE_IRQ_SHAREABLE in their resources, they will be
+ * requested with the IRQF_SHARED flag
+ */
+ errirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!chan || !errirq_res)
+ return -ENODEV;
+
+ if (!request_mem_region(chan->start, resource_size(chan), pdev->name)) {
+ dev_err(&pdev->dev, "DMAC register region already claimed\n");
+ return -EBUSY;
+ }
+
+ if (dmars && !request_mem_region(dmars->start, resource_size(dmars), pdev->name)) {
+ dev_err(&pdev->dev, "DMAC DMARS region already claimed\n");
+ err = -EBUSY;
+ goto ermrdmars;
+ }
+
+ err = -ENOMEM;
shdev = kzalloc(sizeof(struct sh_dmae_device), GFP_KERNEL);
if (!shdev) {
- dev_err(&pdev->dev, "No enough memory\n");
- return -ENOMEM;
+ dev_err(&pdev->dev, "Not enough memory\n");
+ goto ealloc;
+ }
+
+ shdev->chan_reg = ioremap(chan->start, resource_size(chan));
+ if (!shdev->chan_reg)
+ goto emapchan;
+ if (dmars) {
+ shdev->dmars = ioremap(dmars->start, resource_size(dmars));
+ if (!shdev->dmars)
+ goto emapdmars;
}
/* platform data */
- memcpy(&shdev->pdata, pdev->dev.platform_data,
- sizeof(struct sh_dmae_pdata));
+ shdev->pdata = pdata;
/* reset dma controller */
- err = sh_dmae_rst(0);
+ err = sh_dmae_rst(shdev);
if (err)
goto rst_err;
- /* SH7780/85/23 has DMAOR1 */
- if (shdev->pdata.mode & SHDMA_DMAOR1) {
- err = sh_dmae_rst(1);
- if (err)
- goto rst_err;
- }
-
INIT_LIST_HEAD(&shdev->common.channels);
dma_cap_set(DMA_MEMCPY, shdev->common.cap_mask);
- dma_cap_set(DMA_SLAVE, shdev->common.cap_mask);
+ if (dmars)
+ dma_cap_set(DMA_SLAVE, shdev->common.cap_mask);
shdev->common.device_alloc_chan_resources
= sh_dmae_alloc_chan_resources;
@@ -970,30 +986,63 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
shdev->common.copy_align = 5;
#if defined(CONFIG_CPU_SH4)
- /* Non Mix IRQ mode SH7722/SH7730 etc... */
- if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
+ chanirq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 1);
+
+ if (!chanirq_res)
+ chanirq_res = errirq_res;
+ else
+ irqres++;
+
+ if (chanirq_res == errirq_res ||
+ (errirq_res->flags & IORESOURCE_BITS) == IORESOURCE_IRQ_SHAREABLE)
irqflags = IRQF_SHARED;
- eirq[0] = DMTE0_IRQ;
-#if defined(DMTE6_IRQ) && defined(DMAE1_IRQ)
- eirq[1] = DMTE6_IRQ;
-#endif
+
+ errirq = errirq_res->start;
+
+ err = request_irq(errirq, sh_dmae_err, irqflags,
+ "DMAC Address Error", shdev);
+ if (err) {
+ dev_err(&pdev->dev,
+ "DMA failed requesting irq #%d, error %d\n",
+ errirq, err);
+ goto eirq_err;
}
- for (ecnt = 0 ; ecnt < ARRAY_SIZE(eirq); ecnt++) {
- err = request_irq(eirq[ecnt], sh_dmae_err, irqflags,
- "DMAC Address Error", shdev);
- if (err) {
- dev_err(&pdev->dev, "DMA device request_irq"
- "error (irq %d) with return %d\n",
- eirq[ecnt], err);
- goto eirq_err;
+#else
+ chanirq_res = errirq_res;
+#endif /* CONFIG_CPU_SH4 */
+
+ if (chanirq_res->start == chanirq_res->end &&
+ !platform_get_resource(pdev, IORESOURCE_IRQ, 1)) {
+ /* Special case - all multiplexed */
+ for (; irq_cnt < pdata->channel_num; irq_cnt++) {
+ chan_irq[irq_cnt] = chanirq_res->start;
+ chan_flag[irq_cnt] = IRQF_SHARED;
}
+ } else {
+ do {
+ for (i = chanirq_res->start; i <= chanirq_res->end; i++) {
+ if ((errirq_res->flags & IORESOURCE_BITS) ==
+ IORESOURCE_IRQ_SHAREABLE)
+ chan_flag[irq_cnt] = IRQF_SHARED;
+ else
+ chan_flag[irq_cnt] = IRQF_DISABLED;
+ dev_dbg(&pdev->dev,
+ "Found IRQ %d for channel %d\n",
+ i, irq_cnt);
+ chan_irq[irq_cnt++] = i;
+ }
+ chanirq_res = platform_get_resource(pdev,
+ IORESOURCE_IRQ, ++irqres);
+ } while (irq_cnt < pdata->channel_num && chanirq_res);
}
-#endif /* CONFIG_CPU_SH4 */
+
+ if (irq_cnt < pdata->channel_num)
+ goto eirqres;
/* Create DMA Channel */
- for (cnt = 0 ; cnt < MAX_DMA_CHANNELS ; cnt++) {
- err = sh_dmae_chan_probe(shdev, cnt);
+ for (i = 0; i < pdata->channel_num; i++) {
+ err = sh_dmae_chan_probe(shdev, i, chan_irq[i], chan_flag[i]);
if (err)
goto chan_probe_err;
}
@@ -1005,13 +1054,23 @@ static int __init sh_dmae_probe(struct platform_device *pdev)
chan_probe_err:
sh_dmae_chan_remove(shdev);
-
+eirqres:
+#if defined(CONFIG_CPU_SH4)
+ free_irq(errirq, shdev);
eirq_err:
- for (ecnt-- ; ecnt >= 0; ecnt--)
- free_irq(eirq[ecnt], shdev);
-
+#endif
rst_err:
+ if (dmars)
+ iounmap(shdev->dmars);
+emapdmars:
+ iounmap(shdev->chan_reg);
+emapchan:
kfree(shdev);
+ealloc:
+ if (dmars)
+ release_mem_region(dmars->start, resource_size(dmars));
+ermrdmars:
+ release_mem_region(chan->start, resource_size(chan));
return err;
}
@@ -1019,36 +1078,37 @@ rst_err:
static int __exit sh_dmae_remove(struct platform_device *pdev)
{
struct sh_dmae_device *shdev = platform_get_drvdata(pdev);
+ struct resource *res;
+ int errirq = platform_get_irq(pdev, 0);
dma_async_device_unregister(&shdev->common);
- if (shdev->pdata.mode & SHDMA_MIX_IRQ) {
- free_irq(DMTE0_IRQ, shdev);
-#if defined(DMTE6_IRQ)
- free_irq(DMTE6_IRQ, shdev);
-#endif
- }
+ if (errirq > 0)
+ free_irq(errirq, shdev);
/* channel data remove */
sh_dmae_chan_remove(shdev);
- if (!(shdev->pdata.mode & SHDMA_MIX_IRQ)) {
- free_irq(DMAE0_IRQ, shdev);
-#if defined(DMAE1_IRQ)
- free_irq(DMAE1_IRQ, shdev);
-#endif
- }
+ if (shdev->dmars)
+ iounmap(shdev->dmars);
+ iounmap(shdev->chan_reg);
+
kfree(shdev);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res)
+ release_mem_region(res->start, resource_size(res));
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (res)
+ release_mem_region(res->start, resource_size(res));
+
return 0;
}
static void sh_dmae_shutdown(struct platform_device *pdev)
{
struct sh_dmae_device *shdev = platform_get_drvdata(pdev);
- sh_dmae_ctl_stop(0);
- if (shdev->pdata.mode & SHDMA_DMAOR1)
- sh_dmae_ctl_stop(1);
+ sh_dmae_ctl_stop(shdev);
}
static struct platform_driver sh_dmae_driver = {
diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index 7e227f3c87c..800fd884be8 100644
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -47,14 +47,18 @@ struct sh_dmae_chan {
struct tasklet_struct tasklet; /* Tasklet */
int descs_allocated; /* desc count */
int xmit_shift; /* log_2(bytes_per_xfer) */
+ int irq;
int id; /* Raw id of this channel */
+ u32 __iomem *base;
char dev_id[16]; /* unique name per DMAC of channel */
};
struct sh_dmae_device {
struct dma_device common;
struct sh_dmae_chan *chan[MAX_DMA_CHANNELS];
- struct sh_dmae_pdata pdata;
+ struct sh_dmae_pdata *pdata;
+ u32 __iomem *chan_reg;
+ u16 __iomem *dmars;
};
#define to_sh_chan(chan) container_of(chan, struct sh_dmae_chan, common)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-30 12:38:44 +0000