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提交 0745c9a5 编写于 作者: V Vinod Koul 提交者： Vinod Koul
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Merge branch 'samsung_dma' into next

上级 f8de8f4c 51ddf31d
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arch/arm/mach-exynos4/Kconfig
浏览文件 @ 0745c9a5
......@@ -11,7 +11,7 @@ if ARCH_EXYNOS4
config CPU_EXYNOS4210
bool
select S3C_PL330_DMA
select SAMSUNG_DMADEV
help
Enable EXYNOS4210 CPU support
......
arch/arm/mach-exynos4/clock.c
浏览文件 @ 0745c9a5
......@@ -43,6 +43,11 @@ static struct clk clk_sclk_usbphy1 = {
.name = "sclk_usbphy1",
};
static struct clk dummy_apb_pclk = {
.name = "apb_pclk",
.id = -1,
};
static int exynos4_clksrc_mask_top_ctrl(struct clk *clk, int enable)
{
return s5p_gatectrl(S5P_CLKSRC_MASK_TOP, clk, enable);
......@@ -454,12 +459,12 @@ static struct clk init_clocks_off[] = {
.enable = exynos4_clk_ip_fsys_ctrl,
.ctrlbit = (1 << 10),
}, {
.name = "pdma",
.name = "dma",
.devname = "s3c-pl330.0",
.enable = exynos4_clk_ip_fsys_ctrl,
.ctrlbit = (1 << 0),
}, {
.name = "pdma",
.name = "dma",
.devname = "s3c-pl330.1",
.enable = exynos4_clk_ip_fsys_ctrl,
.ctrlbit = (1 << 1),
......@@ -1210,5 +1215,7 @@ void __init exynos4_register_clocks(void)
s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c24xx_register_clock(&dummy_apb_pclk);
s3c_pwmclk_init();
}
arch/arm/mach-exynos4/dma.c
浏览文件 @ 0745c9a5
......@@ -21,151 +21,228 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl330.h>
#include <asm/irq.h>
#include <plat/devs.h>
#include <plat/irqs.h>
#include <mach/map.h>
#include <mach/irqs.h>
#include <plat/s3c-pl330-pdata.h>
#include <mach/dma.h>
static u64 dma_dmamask = DMA_BIT_MASK(32);
static struct resource exynos4_pdma0_resource[] = {
[0] = {
.start = EXYNOS4_PA_PDMA0,
.end = EXYNOS4_PA_PDMA0 + SZ_4K,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_PDMA0,
.end = IRQ_PDMA0,
.flags = IORESOURCE_IRQ,
struct dma_pl330_peri pdma0_peri[28] = {
{
.peri_id = (u8)DMACH_PCM0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_MSM_REQ0,
}, {
.peri_id = (u8)DMACH_MSM_REQ2,
}, {
.peri_id = (u8)DMACH_SPI0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0S_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART4_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART4_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SLIMBUS0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SLIMBUS0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SLIMBUS2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SLIMBUS2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SLIMBUS4_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SLIMBUS4_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_AC97_MICIN,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_AC97_PCMIN,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_AC97_PCMOUT,
.rqtype = MEMTODEV,
},
};
static struct s3c_pl330_platdata exynos4_pdma0_pdata = {
.peri = {
[0] = DMACH_PCM0_RX,
[1] = DMACH_PCM0_TX,
[2] = DMACH_PCM2_RX,
[3] = DMACH_PCM2_TX,
[4] = DMACH_MSM_REQ0,
[5] = DMACH_MSM_REQ2,
[6] = DMACH_SPI0_RX,
[7] = DMACH_SPI0_TX,
[8] = DMACH_SPI2_RX,
[9] = DMACH_SPI2_TX,
[10] = DMACH_I2S0S_TX,
[11] = DMACH_I2S0_RX,
[12] = DMACH_I2S0_TX,
[13] = DMACH_I2S2_RX,
[14] = DMACH_I2S2_TX,
[15] = DMACH_UART0_RX,
[16] = DMACH_UART0_TX,
[17] = DMACH_UART2_RX,
[18] = DMACH_UART2_TX,
[19] = DMACH_UART4_RX,
[20] = DMACH_UART4_TX,
[21] = DMACH_SLIMBUS0_RX,
[22] = DMACH_SLIMBUS0_TX,
[23] = DMACH_SLIMBUS2_RX,
[24] = DMACH_SLIMBUS2_TX,
[25] = DMACH_SLIMBUS4_RX,
[26] = DMACH_SLIMBUS4_TX,
[27] = DMACH_AC97_MICIN,
[28] = DMACH_AC97_PCMIN,
[29] = DMACH_AC97_PCMOUT,
[30] = DMACH_MAX,
[31] = DMACH_MAX,
},
struct dma_pl330_platdata exynos4_pdma0_pdata = {
.nr_valid_peri = ARRAY_SIZE(pdma0_peri),
.peri = pdma0_peri,
};
static struct platform_device exynos4_device_pdma0 = {
.name = "s3c-pl330",
.id = 0,
.num_resources = ARRAY_SIZE(exynos4_pdma0_resource),
.resource = exynos4_pdma0_resource,
.dev = {
struct amba_device exynos4_device_pdma0 = {
.dev = {
.init_name = "dma-pl330.0",
.dma_mask = &dma_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &exynos4_pdma0_pdata,
},
.res = {
.start = EXYNOS4_PA_PDMA0,
.end = EXYNOS4_PA_PDMA0 + SZ_4K,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_PDMA0, NO_IRQ},
.periphid = 0x00041330,
};
static struct resource exynos4_pdma1_resource[] = {
[0] = {
.start = EXYNOS4_PA_PDMA1,
.end = EXYNOS4_PA_PDMA1 + SZ_4K,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_PDMA1,
.end = IRQ_PDMA1,
.flags = IORESOURCE_IRQ,
struct dma_pl330_peri pdma1_peri[25] = {
{
.peri_id = (u8)DMACH_PCM0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_MSM_REQ1,
}, {
.peri_id = (u8)DMACH_MSM_REQ3,
}, {
.peri_id = (u8)DMACH_SPI1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0S_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART3_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART3_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SLIMBUS1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SLIMBUS1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SLIMBUS3_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SLIMBUS3_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SLIMBUS5_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SLIMBUS5_TX,
.rqtype = MEMTODEV,
},
};
static struct s3c_pl330_platdata exynos4_pdma1_pdata = {
.peri = {
[0] = DMACH_PCM0_RX,
[1] = DMACH_PCM0_TX,
[2] = DMACH_PCM1_RX,
[3] = DMACH_PCM1_TX,
[4] = DMACH_MSM_REQ1,
[5] = DMACH_MSM_REQ3,
[6] = DMACH_SPI1_RX,
[7] = DMACH_SPI1_TX,
[8] = DMACH_I2S0S_TX,
[9] = DMACH_I2S0_RX,
[10] = DMACH_I2S0_TX,
[11] = DMACH_I2S1_RX,
[12] = DMACH_I2S1_TX,
[13] = DMACH_UART0_RX,
[14] = DMACH_UART0_TX,
[15] = DMACH_UART1_RX,
[16] = DMACH_UART1_TX,
[17] = DMACH_UART3_RX,
[18] = DMACH_UART3_TX,
[19] = DMACH_SLIMBUS1_RX,
[20] = DMACH_SLIMBUS1_TX,
[21] = DMACH_SLIMBUS3_RX,
[22] = DMACH_SLIMBUS3_TX,
[23] = DMACH_SLIMBUS5_RX,
[24] = DMACH_SLIMBUS5_TX,
[25] = DMACH_SLIMBUS0AUX_RX,
[26] = DMACH_SLIMBUS0AUX_TX,
[27] = DMACH_SPDIF,
[28] = DMACH_MAX,
[29] = DMACH_MAX,
[30] = DMACH_MAX,
[31] = DMACH_MAX,
},
struct dma_pl330_platdata exynos4_pdma1_pdata = {
.nr_valid_peri = ARRAY_SIZE(pdma1_peri),
.peri = pdma1_peri,
};
static struct platform_device exynos4_device_pdma1 = {
.name = "s3c-pl330",
.id = 1,
.num_resources = ARRAY_SIZE(exynos4_pdma1_resource),
.resource = exynos4_pdma1_resource,
.dev = {
struct amba_device exynos4_device_pdma1 = {
.dev = {
.init_name = "dma-pl330.1",
.dma_mask = &dma_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &exynos4_pdma1_pdata,
},
};
static struct platform_device *exynos4_dmacs[] __initdata = {
&exynos4_device_pdma0,
&exynos4_device_pdma1,
.res = {
.start = EXYNOS4_PA_PDMA1,
.end = EXYNOS4_PA_PDMA1 + SZ_4K,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_PDMA1, NO_IRQ},
.periphid = 0x00041330,
};
static int __init exynos4_dma_init(void)
{
platform_add_devices(exynos4_dmacs, ARRAY_SIZE(exynos4_dmacs));
amba_device_register(&exynos4_device_pdma0, &iomem_resource);
return 0;
}
......
arch/arm/mach-exynos4/include/mach/dma.h
浏览文件 @ 0745c9a5
......@@ -20,7 +20,7 @@
#ifndef __MACH_DMA_H
#define __MACH_DMA_H
/* This platform uses the common S3C DMA API driver for PL330 */
#include <plat/s3c-dma-pl330.h>
/* This platform uses the common DMA API driver for PL330 */
#include <plat/dma-pl330.h>
#endif /* __MACH_DMA_H */
arch/arm/mach-s3c2410/include/mach/dma.h
浏览文件 @ 0745c9a5
......@@ -13,7 +13,6 @@
#ifndef __ASM_ARCH_DMA_H
#define __ASM_ARCH_DMA_H __FILE__
#include <plat/dma.h>
#include <linux/sysdev.h>
#define MAX_DMA_TRANSFER_SIZE 0x100000 /* Data Unit is half word */
......@@ -51,6 +50,18 @@ enum dma_ch {
DMACH_MAX, /* the end entry */
};
static inline bool samsung_dma_has_circular(void)
{
return false;
}
static inline bool samsung_dma_is_dmadev(void)
{
return false;
}
#include <plat/dma.h>
#define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */
/* we have 4 dma channels */
......@@ -163,7 +174,7 @@ struct s3c2410_dma_chan {
struct s3c2410_dma_client *client;
/* channel configuration */
enum s3c2410_dmasrc source;
enum dma_data_direction source;
enum dma_ch req_ch;
unsigned long dev_addr;
unsigned long load_timeout;
......@@ -196,9 +207,4 @@ struct s3c2410_dma_chan {
typedef unsigned long dma_device_t;
static inline bool s3c_dma_has_circular(void)
{
return false;
}
#endif /* __ASM_ARCH_DMA_H */
arch/arm/mach-s3c2412/dma.c
浏览文件 @ 0745c9a5
......@@ -148,11 +148,11 @@ static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
static void s3c2412_dma_direction(struct s3c2410_dma_chan *chan,
struct s3c24xx_dma_map *map,
enum s3c2410_dmasrc dir)
enum dma_data_direction dir)
{
unsigned long chsel;
if (dir == S3C2410_DMASRC_HW)
if (dir == DMA_FROM_DEVICE)
chsel = map->channels_rx[0];
else
chsel = map->channels[0];
......
arch/arm/mach-s3c64xx/dma.c
浏览文件 @ 0745c9a5
......@@ -147,14 +147,14 @@ static void s3c64xx_dma_fill_lli(struct s3c2410_dma_chan *chan,
u32 control0, control1;
switch (chan->source) {
case S3C2410_DMASRC_HW:
case DMA_FROM_DEVICE:
src = chan->dev_addr;
dst = data;
control0 = PL080_CONTROL_SRC_AHB2;
control0 |= PL080_CONTROL_DST_INCR;
break;
case S3C2410_DMASRC_MEM:
case DMA_TO_DEVICE:
src = data;
dst = chan->dev_addr;
control0 = PL080_CONTROL_DST_AHB2;
......@@ -416,7 +416,7 @@ EXPORT_SYMBOL(s3c2410_dma_enqueue);
int s3c2410_dma_devconfig(enum dma_ch channel,
enum s3c2410_dmasrc source,
enum dma_data_direction source,
unsigned long devaddr)
{
struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
......@@ -437,11 +437,11 @@ int s3c2410_dma_devconfig(enum dma_ch channel,
pr_debug("%s: peripheral %d\n", __func__, peripheral);
switch (source) {
case S3C2410_DMASRC_HW:
case DMA_FROM_DEVICE:
config = 2 << PL080_CONFIG_FLOW_CONTROL_SHIFT;
config |= peripheral << PL080_CONFIG_SRC_SEL_SHIFT;
break;
case S3C2410_DMASRC_MEM:
case DMA_TO_DEVICE:
config = 1 << PL080_CONFIG_FLOW_CONTROL_SHIFT;
config |= peripheral << PL080_CONFIG_DST_SEL_SHIFT;
break;
......
arch/arm/mach-s3c64xx/include/mach/dma.h
浏览文件 @ 0745c9a5
......@@ -58,11 +58,15 @@ enum dma_ch {
DMACH_MAX /* the end */
};
static __inline__ bool s3c_dma_has_circular(void)
static inline bool samsung_dma_has_circular(void)
{
return true;
}
static inline bool samsung_dma_is_dmadev(void)
{
return false;
}
#define S3C2410_DMAF_CIRCULAR (1 << 0)
#include <plat/dma.h>
......@@ -95,7 +99,7 @@ struct s3c2410_dma_chan {
unsigned char peripheral;
unsigned int flags;
enum s3c2410_dmasrc source;
enum dma_data_direction source;
dma_addr_t dev_addr;
......
arch/arm/mach-s5p64x0/Kconfig
浏览文件 @ 0745c9a5
......@@ -9,14 +9,14 @@ if ARCH_S5P64X0
config CPU_S5P6440
bool
select S3C_PL330_DMA
select SAMSUNG_DMADEV
select S5P_HRT
help
Enable S5P6440 CPU support
config CPU_S5P6450
bool
select S3C_PL330_DMA
select SAMSUNG_DMADEV
select S5P_HRT
help
Enable S5P6450 CPU support
......
arch/arm/mach-s5p64x0/clock-s5p6440.c
浏览文件 @ 0745c9a5
......@@ -146,7 +146,7 @@ static struct clk init_clocks_off[] = {
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 8),
}, {
.name = "pdma",
.name = "dma",
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 12),
......@@ -499,6 +499,11 @@ static struct clksrc_clk *sysclks[] = {
&clk_pclk_low,
};
static struct clk dummy_apb_pclk = {
.name = "apb_pclk",
.id = -1,
};
void __init_or_cpufreq s5p6440_setup_clocks(void)
{
struct clk *xtal_clk;
......@@ -581,5 +586,7 @@ void __init s5p6440_register_clocks(void)
s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c24xx_register_clock(&dummy_apb_pclk);
s3c_pwmclk_init();
}
arch/arm/mach-s5p64x0/clock-s5p6450.c
浏览文件 @ 0745c9a5
......@@ -179,7 +179,7 @@ static struct clk init_clocks_off[] = {
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 3),
}, {
.name = "pdma",
.name = "dma",
.parent = &clk_hclk_low.clk,
.enable = s5p64x0_hclk0_ctrl,
.ctrlbit = (1 << 12),
......@@ -553,6 +553,11 @@ static struct clksrc_clk *sysclks[] = {
&clk_sclk_audio0,
};
static struct clk dummy_apb_pclk = {
.name = "apb_pclk",
.id = -1,
};
void __init_or_cpufreq s5p6450_setup_clocks(void)
{
struct clk *xtal_clk;
......@@ -632,5 +637,7 @@ void __init s5p6450_register_clocks(void)
s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c24xx_register_clock(&dummy_apb_pclk);
s3c_pwmclk_init();
}
arch/arm/mach-s5p64x0/dma.c
浏览文件 @ 0745c9a5
......@@ -21,128 +21,219 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl330.h>
#include <asm/irq.h>
#include <mach/map.h>
#include <mach/irqs.h>
#include <mach/regs-clock.h>
#include <mach/dma.h>
#include <plat/devs.h>
#include <plat/s3c-pl330-pdata.h>
#include <plat/irqs.h>
static u64 dma_dmamask = DMA_BIT_MASK(32);
static struct resource s5p64x0_pdma_resource[] = {
[0] = {
.start = S5P64X0_PA_PDMA,
.end = S5P64X0_PA_PDMA + SZ_4K,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_DMA0,
.end = IRQ_DMA0,
.flags = IORESOURCE_IRQ,
struct dma_pl330_peri s5p6440_pdma_peri[22] = {
{
.peri_id = (u8)DMACH_UART0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART3_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART3_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = DMACH_MAX,
}, {
.peri_id = DMACH_MAX,
}, {
.peri_id = (u8)DMACH_PCM0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_SPI1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI1_RX,
.rqtype = DEVTOMEM,
},
};
static struct s3c_pl330_platdata s5p6440_pdma_pdata = {
.peri = {
[0] = DMACH_UART0_RX,
[1] = DMACH_UART0_TX,
[2] = DMACH_UART1_RX,
[3] = DMACH_UART1_TX,
[4] = DMACH_UART2_RX,
[5] = DMACH_UART2_TX,
[6] = DMACH_UART3_RX,
[7] = DMACH_UART3_TX,
[8] = DMACH_MAX,
[9] = DMACH_MAX,
[10] = DMACH_PCM0_TX,
[11] = DMACH_PCM0_RX,
[12] = DMACH_I2S0_TX,
[13] = DMACH_I2S0_RX,
[14] = DMACH_SPI0_TX,
[15] = DMACH_SPI0_RX,
[16] = DMACH_MAX,
[17] = DMACH_MAX,
[18] = DMACH_MAX,
[19] = DMACH_MAX,
[20] = DMACH_SPI1_TX,
[21] = DMACH_SPI1_RX,
[22] = DMACH_MAX,
[23] = DMACH_MAX,
[24] = DMACH_MAX,
[25] = DMACH_MAX,
[26] = DMACH_MAX,
[27] = DMACH_MAX,
[28] = DMACH_MAX,
[29] = DMACH_PWM,
[30] = DMACH_MAX,
[31] = DMACH_MAX,
},
struct dma_pl330_platdata s5p6440_pdma_pdata = {
.nr_valid_peri = ARRAY_SIZE(s5p6440_pdma_peri),
.peri = s5p6440_pdma_peri,
};
static struct s3c_pl330_platdata s5p6450_pdma_pdata = {
.peri = {
[0] = DMACH_UART0_RX,
[1] = DMACH_UART0_TX,
[2] = DMACH_UART1_RX,
[3] = DMACH_UART1_TX,
[4] = DMACH_UART2_RX,
[5] = DMACH_UART2_TX,
[6] = DMACH_UART3_RX,
[7] = DMACH_UART3_TX,
[8] = DMACH_UART4_RX,
[9] = DMACH_UART4_TX,
[10] = DMACH_PCM0_TX,
[11] = DMACH_PCM0_RX,
[12] = DMACH_I2S0_TX,
[13] = DMACH_I2S0_RX,
[14] = DMACH_SPI0_TX,
[15] = DMACH_SPI0_RX,
[16] = DMACH_PCM1_TX,
[17] = DMACH_PCM1_RX,
[18] = DMACH_PCM2_TX,
[19] = DMACH_PCM2_RX,
[20] = DMACH_SPI1_TX,
[21] = DMACH_SPI1_RX,
[22] = DMACH_USI_TX,
[23] = DMACH_USI_RX,
[24] = DMACH_MAX,
[25] = DMACH_I2S1_TX,
[26] = DMACH_I2S1_RX,
[27] = DMACH_I2S2_TX,
[28] = DMACH_I2S2_RX,
[29] = DMACH_PWM,
[30] = DMACH_UART5_RX,
[31] = DMACH_UART5_TX,
struct dma_pl330_peri s5p6450_pdma_peri[32] = {
{
.peri_id = (u8)DMACH_UART0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART3_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART3_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART4_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART4_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_USI_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_USI_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_I2S1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PWM,
}, {
.peri_id = (u8)DMACH_UART5_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART5_TX,
.rqtype = MEMTODEV,
},
};
static struct platform_device s5p64x0_device_pdma = {
.name = "s3c-pl330",
.id = -1,
.num_resources = ARRAY_SIZE(s5p64x0_pdma_resource),
.resource = s5p64x0_pdma_resource,
.dev = {
struct dma_pl330_platdata s5p6450_pdma_pdata = {
.nr_valid_peri = ARRAY_SIZE(s5p6450_pdma_peri),
.peri = s5p6450_pdma_peri,
};
struct amba_device s5p64x0_device_pdma = {
.dev = {
.init_name = "dma-pl330",
.dma_mask = &dma_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
},
.res = {
.start = S5P64X0_PA_PDMA,
.end = S5P64X0_PA_PDMA + SZ_4K,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_DMA0, NO_IRQ},
.periphid = 0x00041330,
};
static int __init s5p64x0_dma_init(void)
{
unsigned int id;
id = __raw_readl(S5P64X0_SYS_ID) & 0xFF000;
unsigned int id = __raw_readl(S5P64X0_SYS_ID) & 0xFF000;
if (id == 0x50000)
s5p64x0_device_pdma.dev.platform_data = &s5p6450_pdma_pdata;
else
s5p64x0_device_pdma.dev.platform_data = &s5p6440_pdma_pdata;
platform_device_register(&s5p64x0_device_pdma);
amba_device_register(&s5p64x0_device_pdma, &iomem_resource);
return 0;
}
......
arch/arm/mach-s5p64x0/include/mach/dma.h
浏览文件 @ 0745c9a5
......@@ -20,7 +20,7 @@
#ifndef __MACH_DMA_H
#define __MACH_DMA_H
/* This platform uses the common S3C DMA API driver for PL330 */
#include <plat/s3c-dma-pl330.h>
/* This platform uses the common common DMA API driver for PL330 */
#include <plat/dma-pl330.h>
#endif /* __MACH_DMA_H */
arch/arm/mach-s5pc100/Kconfig
浏览文件 @ 0745c9a5
......@@ -10,7 +10,7 @@ if ARCH_S5PC100
config CPU_S5PC100
bool
select S5P_EXT_INT
select S3C_PL330_DMA
select SAMSUNG_DMADEV
help
Enable S5PC100 CPU support
......
arch/arm/mach-s5pc100/clock.c
浏览文件 @ 0745c9a5
......@@ -33,6 +33,11 @@ static struct clk s5p_clk_otgphy = {
.name = "otg_phy",
};
static struct clk dummy_apb_pclk = {
.name = "apb_pclk",
.id = -1,
};
static struct clk *clk_src_mout_href_list[] = {
[0] = &s5p_clk_27m,
[1] = &clk_fin_hpll,
......@@ -454,13 +459,13 @@ static struct clk init_clocks_off[] = {
.enable = s5pc100_d1_0_ctrl,
.ctrlbit = (1 << 2),
}, {
.name = "pdma",
.name = "dma",
.devname = "s3c-pl330.1",
.parent = &clk_div_d1_bus.clk,
.enable = s5pc100_d1_0_ctrl,
.ctrlbit = (1 << 1),
}, {
.name = "pdma",
.name = "dma",
.devname = "s3c-pl330.0",
.parent = &clk_div_d1_bus.clk,
.enable = s5pc100_d1_0_ctrl,
......@@ -1276,5 +1281,7 @@ void __init s5pc100_register_clocks(void)
s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c24xx_register_clock(&dummy_apb_pclk);
s3c_pwmclk_init();
}
arch/arm/mach-s5pc100/dma.c
浏览文件 @ 0745c9a5
/*
/* linux/arch/arm/mach-s5pc100/dma.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Copyright (C) 2010 Samsung Electronics Co. Ltd.
* Jaswinder Singh <jassi.brar@samsung.com>
*
......@@ -17,150 +21,245 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl330.h>
#include <asm/irq.h>
#include <plat/devs.h>
#include <plat/irqs.h>
#include <mach/map.h>
#include <mach/irqs.h>
#include <plat/s3c-pl330-pdata.h>
#include <mach/dma.h>
static u64 dma_dmamask = DMA_BIT_MASK(32);
static struct resource s5pc100_pdma0_resource[] = {
[0] = {
.start = S5PC100_PA_PDMA0,
.end = S5PC100_PA_PDMA0 + SZ_4K,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_PDMA0,
.end = IRQ_PDMA0,
.flags = IORESOURCE_IRQ,
struct dma_pl330_peri pdma0_peri[30] = {
{
.peri_id = (u8)DMACH_UART0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART3_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART3_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = DMACH_IRDA,
}, {
.peri_id = (u8)DMACH_I2S0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0S_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_AC97_MICIN,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_AC97_PCMIN,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_AC97_PCMOUT,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_EXTERNAL,
}, {
.peri_id = (u8)DMACH_PWM,
}, {
.peri_id = (u8)DMACH_SPDIF,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_HSI_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_HSI_TX,
.rqtype = MEMTODEV,
},
};
static struct s3c_pl330_platdata s5pc100_pdma0_pdata = {
.peri = {
[0] = DMACH_UART0_RX,
[1] = DMACH_UART0_TX,
[2] = DMACH_UART1_RX,
[3] = DMACH_UART1_TX,
[4] = DMACH_UART2_RX,
[5] = DMACH_UART2_TX,
[6] = DMACH_UART3_RX,
[7] = DMACH_UART3_TX,
[8] = DMACH_IRDA,
[9] = DMACH_I2S0_RX,
[10] = DMACH_I2S0_TX,
[11] = DMACH_I2S0S_TX,
[12] = DMACH_I2S1_RX,
[13] = DMACH_I2S1_TX,
[14] = DMACH_I2S2_RX,
[15] = DMACH_I2S2_TX,
[16] = DMACH_SPI0_RX,
[17] = DMACH_SPI0_TX,
[18] = DMACH_SPI1_RX,
[19] = DMACH_SPI1_TX,
[20] = DMACH_SPI2_RX,
[21] = DMACH_SPI2_TX,
[22] = DMACH_AC97_MICIN,
[23] = DMACH_AC97_PCMIN,
[24] = DMACH_AC97_PCMOUT,
[25] = DMACH_EXTERNAL,
[26] = DMACH_PWM,
[27] = DMACH_SPDIF,
[28] = DMACH_HSI_RX,
[29] = DMACH_HSI_TX,
[30] = DMACH_MAX,
[31] = DMACH_MAX,
},
struct dma_pl330_platdata s5pc100_pdma0_pdata = {
.nr_valid_peri = ARRAY_SIZE(pdma0_peri),
.peri = pdma0_peri,
};
static struct platform_device s5pc100_device_pdma0 = {
.name = "s3c-pl330",
.id = 0,
.num_resources = ARRAY_SIZE(s5pc100_pdma0_resource),
.resource = s5pc100_pdma0_resource,
.dev = {
struct amba_device s5pc100_device_pdma0 = {
.dev = {
.init_name = "dma-pl330.0",
.dma_mask = &dma_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &s5pc100_pdma0_pdata,
},
};
static struct resource s5pc100_pdma1_resource[] = {
[0] = {
.start = S5PC100_PA_PDMA1,
.end = S5PC100_PA_PDMA1 + SZ_4K,
.res = {
.start = S5PC100_PA_PDMA0,
.end = S5PC100_PA_PDMA0 + SZ_4K,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_PDMA1,
.end = IRQ_PDMA1,
.flags = IORESOURCE_IRQ,
},
.irq = {IRQ_PDMA0, NO_IRQ},
.periphid = 0x00041330,
};
static struct s3c_pl330_platdata s5pc100_pdma1_pdata = {
.peri = {
[0] = DMACH_UART0_RX,
[1] = DMACH_UART0_TX,
[2] = DMACH_UART1_RX,
[3] = DMACH_UART1_TX,
[4] = DMACH_UART2_RX,
[5] = DMACH_UART2_TX,
[6] = DMACH_UART3_RX,
[7] = DMACH_UART3_TX,
[8] = DMACH_IRDA,
[9] = DMACH_I2S0_RX,
[10] = DMACH_I2S0_TX,
[11] = DMACH_I2S0S_TX,
[12] = DMACH_I2S1_RX,
[13] = DMACH_I2S1_TX,
[14] = DMACH_I2S2_RX,
[15] = DMACH_I2S2_TX,
[16] = DMACH_SPI0_RX,
[17] = DMACH_SPI0_TX,
[18] = DMACH_SPI1_RX,
[19] = DMACH_SPI1_TX,
[20] = DMACH_SPI2_RX,
[21] = DMACH_SPI2_TX,
[22] = DMACH_PCM0_RX,
[23] = DMACH_PCM0_TX,
[24] = DMACH_PCM1_RX,
[25] = DMACH_PCM1_TX,
[26] = DMACH_MSM_REQ0,
[27] = DMACH_MSM_REQ1,
[28] = DMACH_MSM_REQ2,
[29] = DMACH_MSM_REQ3,
[30] = DMACH_MAX,
[31] = DMACH_MAX,
struct dma_pl330_peri pdma1_peri[30] = {
{
.peri_id = (u8)DMACH_UART0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART3_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART3_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = DMACH_IRDA,
}, {
.peri_id = (u8)DMACH_I2S0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0S_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_MSM_REQ0,
}, {
.peri_id = (u8)DMACH_MSM_REQ1,
}, {
.peri_id = (u8)DMACH_MSM_REQ2,
}, {
.peri_id = (u8)DMACH_MSM_REQ3,
},
};
static struct platform_device s5pc100_device_pdma1 = {
.name = "s3c-pl330",
.id = 1,
.num_resources = ARRAY_SIZE(s5pc100_pdma1_resource),
.resource = s5pc100_pdma1_resource,
.dev = {
struct dma_pl330_platdata s5pc100_pdma1_pdata = {
.nr_valid_peri = ARRAY_SIZE(pdma1_peri),
.peri = pdma1_peri,
};
struct amba_device s5pc100_device_pdma1 = {
.dev = {
.init_name = "dma-pl330.1",
.dma_mask = &dma_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &s5pc100_pdma1_pdata,
},
};
static struct platform_device *s5pc100_dmacs[] __initdata = {
&s5pc100_device_pdma0,
&s5pc100_device_pdma1,
.res = {
.start = S5PC100_PA_PDMA1,
.end = S5PC100_PA_PDMA1 + SZ_4K,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_PDMA1, NO_IRQ},
.periphid = 0x00041330,
};
static int __init s5pc100_dma_init(void)
{
platform_add_devices(s5pc100_dmacs, ARRAY_SIZE(s5pc100_dmacs));
amba_device_register(&s5pc100_device_pdma0, &iomem_resource);
return 0;
}
......
arch/arm/mach-s5pc100/include/mach/dma.h
浏览文件 @ 0745c9a5
......@@ -20,7 +20,7 @@
#ifndef __MACH_DMA_H
#define __MACH_DMA_H
/* This platform uses the common S3C DMA API driver for PL330 */
#include <plat/s3c-dma-pl330.h>
/* This platform uses the common DMA API driver for PL330 */
#include <plat/dma-pl330.h>
#endif /* __MACH_DMA_H */
arch/arm/mach-s5pv210/Kconfig
浏览文件 @ 0745c9a5
......@@ -11,7 +11,7 @@ if ARCH_S5PV210
config CPU_S5PV210
bool
select S3C_PL330_DMA
select SAMSUNG_DMADEV
select S5P_EXT_INT
select S5P_HRT
select S5PV210_PM if PM
......
arch/arm/mach-s5pv210/clock.c
浏览文件 @ 0745c9a5
......@@ -203,6 +203,11 @@ static struct clk clk_pcmcdclk2 = {
.name = "pcmcdclk",
};
static struct clk dummy_apb_pclk = {
.name = "apb_pclk",
.id = -1,
};
static struct clk *clkset_vpllsrc_list[] = {
[0] = &clk_fin_vpll,
[1] = &clk_sclk_hdmi27m,
......@@ -289,13 +294,13 @@ static struct clk_ops clk_fout_apll_ops = {
static struct clk init_clocks_off[] = {
{
.name = "pdma",
.name = "dma",
.devname = "s3c-pl330.0",
.parent = &clk_hclk_psys.clk,
.enable = s5pv210_clk_ip0_ctrl,
.ctrlbit = (1 << 3),
}, {
.name = "pdma",
.name = "dma",
.devname = "s3c-pl330.1",
.parent = &clk_hclk_psys.clk,
.enable = s5pv210_clk_ip0_ctrl,
......@@ -1161,5 +1166,6 @@ void __init s5pv210_register_clocks(void)
s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off));
s3c24xx_register_clock(&dummy_apb_pclk);
s3c_pwmclk_init();
}
arch/arm/mach-s5pv210/dma.c
浏览文件 @ 0745c9a5
/*
/* linux/arch/arm/mach-s5pv210/dma.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Copyright (C) 2010 Samsung Electronics Co. Ltd.
* Jaswinder Singh <jassi.brar@samsung.com>
*
......@@ -17,151 +21,239 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl330.h>
#include <asm/irq.h>
#include <plat/devs.h>
#include <plat/irqs.h>
#include <mach/map.h>
#include <mach/irqs.h>
#include <plat/s3c-pl330-pdata.h>
#include <mach/dma.h>
static u64 dma_dmamask = DMA_BIT_MASK(32);
static struct resource s5pv210_pdma0_resource[] = {
[0] = {
.start = S5PV210_PA_PDMA0,
.end = S5PV210_PA_PDMA0 + SZ_4K,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_PDMA0,
.end = IRQ_PDMA0,
.flags = IORESOURCE_IRQ,
struct dma_pl330_peri pdma0_peri[28] = {
{
.peri_id = (u8)DMACH_UART0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART3_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART3_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = DMACH_MAX,
}, {
.peri_id = (u8)DMACH_I2S0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0S_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_SPI0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_AC97_MICIN,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_AC97_PCMIN,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_AC97_PCMOUT,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_PWM,
}, {
.peri_id = (u8)DMACH_SPDIF,
.rqtype = MEMTODEV,
},
};
static struct s3c_pl330_platdata s5pv210_pdma0_pdata = {
.peri = {
[0] = DMACH_UART0_RX,
[1] = DMACH_UART0_TX,
[2] = DMACH_UART1_RX,
[3] = DMACH_UART1_TX,
[4] = DMACH_UART2_RX,
[5] = DMACH_UART2_TX,
[6] = DMACH_UART3_RX,
[7] = DMACH_UART3_TX,
[8] = DMACH_MAX,
[9] = DMACH_I2S0_RX,
[10] = DMACH_I2S0_TX,
[11] = DMACH_I2S0S_TX,
[12] = DMACH_I2S1_RX,
[13] = DMACH_I2S1_TX,
[14] = DMACH_MAX,
[15] = DMACH_MAX,
[16] = DMACH_SPI0_RX,
[17] = DMACH_SPI0_TX,
[18] = DMACH_SPI1_RX,
[19] = DMACH_SPI1_TX,
[20] = DMACH_MAX,
[21] = DMACH_MAX,
[22] = DMACH_AC97_MICIN,
[23] = DMACH_AC97_PCMIN,
[24] = DMACH_AC97_PCMOUT,
[25] = DMACH_MAX,
[26] = DMACH_PWM,
[27] = DMACH_SPDIF,
[28] = DMACH_MAX,
[29] = DMACH_MAX,
[30] = DMACH_MAX,
[31] = DMACH_MAX,
},
struct dma_pl330_platdata s5pv210_pdma0_pdata = {
.nr_valid_peri = ARRAY_SIZE(pdma0_peri),
.peri = pdma0_peri,
};
static struct platform_device s5pv210_device_pdma0 = {
.name = "s3c-pl330",
.id = 0,
.num_resources = ARRAY_SIZE(s5pv210_pdma0_resource),
.resource = s5pv210_pdma0_resource,
.dev = {
struct amba_device s5pv210_device_pdma0 = {
.dev = {
.init_name = "dma-pl330.0",
.dma_mask = &dma_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &s5pv210_pdma0_pdata,
},
};
static struct resource s5pv210_pdma1_resource[] = {
[0] = {
.start = S5PV210_PA_PDMA1,
.end = S5PV210_PA_PDMA1 + SZ_4K,
.res = {
.start = S5PV210_PA_PDMA0,
.end = S5PV210_PA_PDMA0 + SZ_4K,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_PDMA1,
.end = IRQ_PDMA1,
.flags = IORESOURCE_IRQ,
},
.irq = {IRQ_PDMA0, NO_IRQ},
.periphid = 0x00041330,
};
static struct s3c_pl330_platdata s5pv210_pdma1_pdata = {
.peri = {
[0] = DMACH_UART0_RX,
[1] = DMACH_UART0_TX,
[2] = DMACH_UART1_RX,
[3] = DMACH_UART1_TX,
[4] = DMACH_UART2_RX,
[5] = DMACH_UART2_TX,
[6] = DMACH_UART3_RX,
[7] = DMACH_UART3_TX,
[8] = DMACH_MAX,
[9] = DMACH_I2S0_RX,
[10] = DMACH_I2S0_TX,
[11] = DMACH_I2S0S_TX,
[12] = DMACH_I2S1_RX,
[13] = DMACH_I2S1_TX,
[14] = DMACH_I2S2_RX,
[15] = DMACH_I2S2_TX,
[16] = DMACH_SPI0_RX,
[17] = DMACH_SPI0_TX,
[18] = DMACH_SPI1_RX,
[19] = DMACH_SPI1_TX,
[20] = DMACH_MAX,
[21] = DMACH_MAX,
[22] = DMACH_PCM0_RX,
[23] = DMACH_PCM0_TX,
[24] = DMACH_PCM1_RX,
[25] = DMACH_PCM1_TX,
[26] = DMACH_MSM_REQ0,
[27] = DMACH_MSM_REQ1,
[28] = DMACH_MSM_REQ2,
[29] = DMACH_MSM_REQ3,
[30] = DMACH_PCM2_RX,
[31] = DMACH_PCM2_TX,
struct dma_pl330_peri pdma1_peri[32] = {
{
.peri_id = (u8)DMACH_UART0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_UART3_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_UART3_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = DMACH_MAX,
}, {
.peri_id = (u8)DMACH_I2S0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S0S_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_I2S2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_I2S2_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_SPI1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_SPI1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_MAX,
}, {
.peri_id = (u8)DMACH_PCM0_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM0_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_PCM1_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM1_TX,
.rqtype = MEMTODEV,
}, {
.peri_id = (u8)DMACH_MSM_REQ0,
}, {
.peri_id = (u8)DMACH_MSM_REQ1,
}, {
.peri_id = (u8)DMACH_MSM_REQ2,
}, {
.peri_id = (u8)DMACH_MSM_REQ3,
}, {
.peri_id = (u8)DMACH_PCM2_RX,
.rqtype = DEVTOMEM,
}, {
.peri_id = (u8)DMACH_PCM2_TX,
.rqtype = MEMTODEV,
},
};
static struct platform_device s5pv210_device_pdma1 = {
.name = "s3c-pl330",
.id = 1,
.num_resources = ARRAY_SIZE(s5pv210_pdma1_resource),
.resource = s5pv210_pdma1_resource,
.dev = {
struct dma_pl330_platdata s5pv210_pdma1_pdata = {
.nr_valid_peri = ARRAY_SIZE(pdma1_peri),
.peri = pdma1_peri,
};
struct amba_device s5pv210_device_pdma1 = {
.dev = {
.init_name = "dma-pl330.1",
.dma_mask = &dma_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &s5pv210_pdma1_pdata,
},
};
static struct platform_device *s5pv210_dmacs[] __initdata = {
&s5pv210_device_pdma0,
&s5pv210_device_pdma1,
.res = {
.start = S5PV210_PA_PDMA1,
.end = S5PV210_PA_PDMA1 + SZ_4K,
.flags = IORESOURCE_MEM,
},
.irq = {IRQ_PDMA1, NO_IRQ},
.periphid = 0x00041330,
};
static int __init s5pv210_dma_init(void)
{
platform_add_devices(s5pv210_dmacs, ARRAY_SIZE(s5pv210_dmacs));
amba_device_register(&s5pv210_device_pdma0, &iomem_resource);
return 0;
}
......
arch/arm/mach-s5pv210/include/mach/dma.h
浏览文件 @ 0745c9a5
......@@ -20,7 +20,7 @@
#ifndef __MACH_DMA_H
#define __MACH_DMA_H
/* This platform uses the common S3C DMA API driver for PL330 */
#include <plat/s3c-dma-pl330.h>
/* This platform uses the common DMA API driver for PL330 */
#include <plat/dma-pl330.h>
#endif /* __MACH_DMA_H */
arch/arm/plat-s3c24xx/dma.c
浏览文件 @ 0745c9a5
......@@ -1094,14 +1094,14 @@ EXPORT_SYMBOL(s3c2410_dma_config);
*
* configure the dma source/destination hardware type and address
*
* source: S3C2410_DMASRC_HW: source is hardware
* S3C2410_DMASRC_MEM: source is memory
* source: DMA_FROM_DEVICE: source is hardware
* DMA_TO_DEVICE: source is memory
*
* devaddr: physical address of the source
*/
int s3c2410_dma_devconfig(enum dma_ch channel,
enum s3c2410_dmasrc source,
enum dma_data_direction source,
unsigned long devaddr)
{
struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
......@@ -1131,7 +1131,7 @@ int s3c2410_dma_devconfig(enum dma_ch channel,
hwcfg |= S3C2410_DISRCC_INC;
switch (source) {
case S3C2410_DMASRC_HW:
case DMA_FROM_DEVICE:
/* source is hardware */
pr_debug("%s: hw source, devaddr=%08lx, hwcfg=%d\n",
__func__, devaddr, hwcfg);
......@@ -1142,7 +1142,7 @@ int s3c2410_dma_devconfig(enum dma_ch channel,
chan->addr_reg = dma_regaddr(chan, S3C2410_DMA_DIDST);
break;
case S3C2410_DMASRC_MEM:
case DMA_TO_DEVICE:
/* source is memory */
pr_debug("%s: mem source, devaddr=%08lx, hwcfg=%d\n",
__func__, devaddr, hwcfg);
......
arch/arm/plat-samsung/Kconfig
浏览文件 @ 0745c9a5
......@@ -300,11 +300,14 @@ config S3C_DMA
help
Internal configuration for S3C DMA core
config S3C_PL330_DMA
config SAMSUNG_DMADEV
bool
select PL330
select DMADEVICES
select PL330_DMA if (CPU_EXYNOS4210 || CPU_S5PV210 || CPU_S5PC100 || \
CPU_S5P6450 || CPU_S5P6440)
select ARM_AMBA
help
S3C DMA API Driver for PL330 DMAC.
Use DMA device engine for PL330 DMAC.
comment "Power management"
......
arch/arm/plat-samsung/Makefile
浏览文件 @ 0745c9a5
......@@ -63,9 +63,9 @@ obj-$(CONFIG_SAMSUNG_DEV_BACKLIGHT) += dev-backlight.o
# DMA support
obj-$(CONFIG_S3C_DMA) += dma.o
obj-$(CONFIG_S3C_DMA) += dma.o s3c-dma-ops.o
obj-$(CONFIG_S3C_PL330_DMA) += s3c-pl330.o
obj-$(CONFIG_SAMSUNG_DMADEV) += dma-ops.o
# PM support
......
arch/arm/plat-samsung/dma-ops.c 0 → 100644
浏览文件 @ 0745c9a5
/* linux/arch/arm/plat-samsung/dma-ops.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Samsung DMA Operations
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/amba/pl330.h>
#include <linux/scatterlist.h>
#include <mach/dma.h>
static inline bool pl330_filter(struct dma_chan *chan, void *param)
{
struct dma_pl330_peri *peri = chan->private;
return peri->peri_id == (unsigned)param;
}
static unsigned samsung_dmadev_request(enum dma_ch dma_ch,
struct samsung_dma_info *info)
{
struct dma_chan *chan;
dma_cap_mask_t mask;
struct dma_slave_config slave_config;
dma_cap_zero(mask);
dma_cap_set(info->cap, mask);
chan = dma_request_channel(mask, pl330_filter, (void *)dma_ch);
if (info->direction == DMA_FROM_DEVICE) {
memset(&slave_config, 0, sizeof(struct dma_slave_config));
slave_config.direction = info->direction;
slave_config.src_addr = info->fifo;
slave_config.src_addr_width = info->width;
slave_config.src_maxburst = 1;
dmaengine_slave_config(chan, &slave_config);
} else if (info->direction == DMA_TO_DEVICE) {
memset(&slave_config, 0, sizeof(struct dma_slave_config));
slave_config.direction = info->direction;
slave_config.dst_addr = info->fifo;
slave_config.dst_addr_width = info->width;
slave_config.dst_maxburst = 1;
dmaengine_slave_config(chan, &slave_config);
}
return (unsigned)chan;
}
static int samsung_dmadev_release(unsigned ch,
struct s3c2410_dma_client *client)
{
dma_release_channel((struct dma_chan *)ch);
return 0;
}
static int samsung_dmadev_prepare(unsigned ch,
struct samsung_dma_prep_info *info)
{
struct scatterlist sg;
struct dma_chan *chan = (struct dma_chan *)ch;
struct dma_async_tx_descriptor *desc;
switch (info->cap) {
case DMA_SLAVE:
sg_init_table(&sg, 1);
sg_dma_len(&sg) = info->len;
sg_set_page(&sg, pfn_to_page(PFN_DOWN(info->buf)),
info->len, offset_in_page(info->buf));
sg_dma_address(&sg) = info->buf;
desc = chan->device->device_prep_slave_sg(chan,
&sg, 1, info->direction, DMA_PREP_INTERRUPT);
break;
case DMA_CYCLIC:
desc = chan->device->device_prep_dma_cyclic(chan,
info->buf, info->len, info->period, info->direction);
break;
default:
dev_err(&chan->dev->device, "unsupported format\n");
return -EFAULT;
}
if (!desc) {
dev_err(&chan->dev->device, "cannot prepare cyclic dma\n");
return -EFAULT;
}
desc->callback = info->fp;
desc->callback_param = info->fp_param;
dmaengine_submit((struct dma_async_tx_descriptor *)desc);
return 0;
}
static inline int samsung_dmadev_trigger(unsigned ch)
{
dma_async_issue_pending((struct dma_chan *)ch);
return 0;
}
static inline int samsung_dmadev_flush(unsigned ch)
{
return dmaengine_terminate_all((struct dma_chan *)ch);
}
struct samsung_dma_ops dmadev_ops = {
.request = samsung_dmadev_request,
.release = samsung_dmadev_release,
.prepare = samsung_dmadev_prepare,
.trigger = samsung_dmadev_trigger,
.started = NULL,
.flush = samsung_dmadev_flush,
.stop = samsung_dmadev_flush,
};
void *samsung_dmadev_get_ops(void)
{
return &dmadev_ops;
}
EXPORT_SYMBOL(samsung_dmadev_get_ops);
arch/arm/plat-samsung/include/plat/dma-ops.h 0 → 100644
浏览文件 @ 0745c9a5
/* arch/arm/plat-samsung/include/plat/dma-ops.h
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Samsung DMA support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __SAMSUNG_DMA_OPS_H_
#define __SAMSUNG_DMA_OPS_H_ __FILE__
#include <linux/dmaengine.h>
struct samsung_dma_prep_info {
enum dma_transaction_type cap;
enum dma_data_direction direction;
dma_addr_t buf;
unsigned long period;
unsigned long len;
void (*fp)(void *data);
void *fp_param;
};
struct samsung_dma_info {
enum dma_transaction_type cap;
enum dma_data_direction direction;
enum dma_slave_buswidth width;
dma_addr_t fifo;
struct s3c2410_dma_client *client;
};
struct samsung_dma_ops {
unsigned (*request)(enum dma_ch ch, struct samsung_dma_info *info);
int (*release)(unsigned ch, struct s3c2410_dma_client *client);
int (*prepare)(unsigned ch, struct samsung_dma_prep_info *info);
int (*trigger)(unsigned ch);
int (*started)(unsigned ch);
int (*flush)(unsigned ch);
int (*stop)(unsigned ch);
};
extern void *samsung_dmadev_get_ops(void);
extern void *s3c_dma_get_ops(void);
static inline void *__samsung_dma_get_ops(void)
{
if (samsung_dma_is_dmadev())
return samsung_dmadev_get_ops();
else
return s3c_dma_get_ops();
}
/*
* samsung_dma_get_ops
* get the set of samsung dma operations
*/
#define samsung_dma_get_ops() __samsung_dma_get_ops()
#endif /* __SAMSUNG_DMA_OPS_H_ */
arch/arm/plat-samsung/include/plat/s3c-dma-pl330.h → arch/arm/plat-samsung/include/plat/dma-pl330.h
浏览文件 @ 0745c9a5
......@@ -8,11 +8,8 @@
* (at your option) any later version.
*/
#ifndef __S3C_DMA_PL330_H_
#define __S3C_DMA_PL330_H_
#define S3C2410_DMAF_AUTOSTART (1 << 0)
#define S3C2410_DMAF_CIRCULAR (1 << 1)
#ifndef __DMA_PL330_H_
#define __DMA_PL330_H_ __FILE__
/*
* PL330 can assign any channel to communicate with
......@@ -20,7 +17,7 @@
* For the sake of consistency across client drivers,
* We keep the channel names unchanged and only add
* missing peripherals are added.
* Order is not important since S3C PL330 API driver
* Order is not important since DMA PL330 API driver
* use these just as IDs.
*/
enum dma_ch {
......@@ -88,11 +85,20 @@ enum dma_ch {
DMACH_MAX,
};
static inline bool s3c_dma_has_circular(void)
struct s3c2410_dma_client {
char *name;
};
static inline bool samsung_dma_has_circular(void)
{
return true;
}
static inline bool samsung_dma_is_dmadev(void)
{
return true;
}
#include <plat/dma.h>
#include <plat/dma-ops.h>
#endif /* __S3C_DMA_PL330_H_ */
#endif /* __DMA_PL330_H_ */
arch/arm/plat-samsung/include/plat/dma-s3c24xx.h
浏览文件 @ 0745c9a5
......@@ -47,7 +47,7 @@ struct s3c24xx_dma_selection {
void (*direction)(struct s3c2410_dma_chan *chan,
struct s3c24xx_dma_map *map,
enum s3c2410_dmasrc dir);
enum dma_data_direction dir);
};
extern int s3c24xx_dma_init_map(struct s3c24xx_dma_selection *sel);
......
arch/arm/plat-samsung/include/plat/dma.h
浏览文件 @ 0745c9a5
......@@ -10,17 +10,14 @@
* published by the Free Software Foundation.
*/
#include <linux/dma-mapping.h>
enum s3c2410_dma_buffresult {
S3C2410_RES_OK,
S3C2410_RES_ERR,
S3C2410_RES_ABORT
};
enum s3c2410_dmasrc {
S3C2410_DMASRC_HW, /* source is memory */
S3C2410_DMASRC_MEM /* source is hardware */
};
/* enum s3c2410_chan_op
*
* operation codes passed to the DMA code by the user, and also used
......@@ -112,7 +109,7 @@ extern int s3c2410_dma_config(enum dma_ch channel, int xferunit);
*/
extern int s3c2410_dma_devconfig(enum dma_ch channel,
enum s3c2410_dmasrc source, unsigned long devaddr);
enum dma_data_direction source, unsigned long devaddr);
/* s3c2410_dma_getposition
*
......@@ -126,3 +123,4 @@ extern int s3c2410_dma_set_opfn(enum dma_ch, s3c2410_dma_opfn_t rtn);
extern int s3c2410_dma_set_buffdone_fn(enum dma_ch, s3c2410_dma_cbfn_t rtn);
#include <plat/dma-ops.h>
arch/arm/plat-samsung/include/plat/s3c-pl330-pdata.h 已删除 100644 → 0
浏览文件 @ f8de8f4c
/* linux/arch/arm/plat-samsung/include/plat/s3c-pl330-pdata.h
*
* Copyright (C) 2010 Samsung Electronics Co. Ltd.
* Jaswinder Singh <jassi.brar@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __S3C_PL330_PDATA_H
#define __S3C_PL330_PDATA_H
#include <plat/s3c-dma-pl330.h>
/*
* Every PL330 DMAC has max 32 peripheral interfaces,
* of which some may be not be really used in your
* DMAC's configuration.
* Populate this array of 32 peri i/fs with relevant
* channel IDs for used peri i/f and DMACH_MAX for
* those unused.
*
* The platforms just need to provide this info
* to the S3C DMA API driver for PL330.
*/
struct s3c_pl330_platdata {
enum dma_ch peri[32];
};
#endif /* __S3C_PL330_PDATA_H */
arch/arm/plat-samsung/s3c-dma-ops.c 0 → 100644
浏览文件 @ 0745c9a5
/* linux/arch/arm/plat-samsung/s3c-dma-ops.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Samsung S3C-DMA Operations
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <mach/dma.h>
struct cb_data {
void (*fp) (void *);
void *fp_param;
unsigned ch;
struct list_head node;
};
static LIST_HEAD(dma_list);
static void s3c_dma_cb(struct s3c2410_dma_chan *channel, void *param,
int size, enum s3c2410_dma_buffresult res)
{
struct cb_data *data = param;
data->fp(data->fp_param);
}
static unsigned s3c_dma_request(enum dma_ch dma_ch,
struct samsung_dma_info *info)
{
struct cb_data *data;
if (s3c2410_dma_request(dma_ch, info->client, NULL) < 0) {
s3c2410_dma_free(dma_ch, info->client);
return 0;
}
data = kzalloc(sizeof(struct cb_data), GFP_KERNEL);
data->ch = dma_ch;
list_add_tail(&data->node, &dma_list);
s3c2410_dma_devconfig(dma_ch, info->direction, info->fifo);
if (info->cap == DMA_CYCLIC)
s3c2410_dma_setflags(dma_ch, S3C2410_DMAF_CIRCULAR);
s3c2410_dma_config(dma_ch, info->width);
return (unsigned)dma_ch;
}
static int s3c_dma_release(unsigned ch, struct s3c2410_dma_client *client)
{
struct cb_data *data;
list_for_each_entry(data, &dma_list, node)
if (data->ch == ch)
break;
list_del(&data->node);
s3c2410_dma_free(ch, client);
kfree(data);
return 0;
}
static int s3c_dma_prepare(unsigned ch, struct samsung_dma_prep_info *info)
{
struct cb_data *data;
int len = (info->cap == DMA_CYCLIC) ? info->period : info->len;
list_for_each_entry(data, &dma_list, node)
if (data->ch == ch)
break;
if (!data->fp) {
s3c2410_dma_set_buffdone_fn(ch, s3c_dma_cb);
data->fp = info->fp;
data->fp_param = info->fp_param;
}
s3c2410_dma_enqueue(ch, (void *)data, info->buf, len);
return 0;
}
static inline int s3c_dma_trigger(unsigned ch)
{
return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_START);
}
static inline int s3c_dma_started(unsigned ch)
{
return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_STARTED);
}
static inline int s3c_dma_flush(unsigned ch)
{
return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_FLUSH);
}
static inline int s3c_dma_stop(unsigned ch)
{
return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_STOP);
}
static struct samsung_dma_ops s3c_dma_ops = {
.request = s3c_dma_request,
.release = s3c_dma_release,
.prepare = s3c_dma_prepare,
.trigger = s3c_dma_trigger,
.started = s3c_dma_started,
.flush = s3c_dma_flush,
.stop = s3c_dma_stop,
};
void *s3c_dma_get_ops(void)
{
return &s3c_dma_ops;
}
EXPORT_SYMBOL(s3c_dma_get_ops);
arch/arm/plat-samsung/s3c-pl330.c 已删除 100644 → 0
浏览文件 @ f8de8f4c
/* linux/arch/arm/plat-samsung/s3c-pl330.c
*
* Copyright (C) 2010 Samsung Electronics Co. Ltd.
* Jaswinder Singh <jassi.brar@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <asm/hardware/pl330.h>
#include <plat/s3c-pl330-pdata.h>
/**
* struct s3c_pl330_dmac - Logical representation of a PL330 DMAC.
* @busy_chan: Number of channels currently busy.
* @peri: List of IDs of peripherals this DMAC can work with.
* @node: To attach to the global list of DMACs.
* @pi: PL330 configuration info for the DMAC.
* @kmcache: Pool to quickly allocate xfers for all channels in the dmac.
* @clk: Pointer of DMAC operation clock.
*/
struct s3c_pl330_dmac {
unsigned busy_chan;
enum dma_ch *peri;
struct list_head node;
struct pl330_info *pi;
struct kmem_cache *kmcache;
struct clk *clk;
};
/**
* struct s3c_pl330_xfer - A request submitted by S3C DMA clients.
* @token: Xfer ID provided by the client.
* @node: To attach to the list of xfers on a channel.
* @px: Xfer for PL330 core.
* @chan: Owner channel of this xfer.
*/
struct s3c_pl330_xfer {
void *token;
struct list_head node;
struct pl330_xfer px;
struct s3c_pl330_chan *chan;
};
/**
* struct s3c_pl330_chan - Logical channel to communicate with
* a Physical peripheral.
* @pl330_chan_id: Token of a hardware channel thread of PL330 DMAC.
* NULL if the channel is available to be acquired.
* @id: ID of the peripheral that this channel can communicate with.
* @options: Options specified by the client.
* @sdaddr: Address provided via s3c2410_dma_devconfig.
* @node: To attach to the global list of channels.
* @lrq: Pointer to the last submitted pl330_req to PL330 core.
* @xfer_list: To manage list of xfers enqueued.
* @req: Two requests to communicate with the PL330 engine.
* @callback_fn: Callback function to the client.
* @rqcfg: Channel configuration for the xfers.
* @xfer_head: Pointer to the xfer to be next executed.
* @dmac: Pointer to the DMAC that manages this channel, NULL if the
* channel is available to be acquired.
* @client: Client of this channel. NULL if the
* channel is available to be acquired.
*/
struct s3c_pl330_chan {
void *pl330_chan_id;
enum dma_ch id;
unsigned int options;
unsigned long sdaddr;
struct list_head node;
struct pl330_req *lrq;
struct list_head xfer_list;
struct pl330_req req[2];
s3c2410_dma_cbfn_t callback_fn;
struct pl330_reqcfg rqcfg;
struct s3c_pl330_xfer *xfer_head;
struct s3c_pl330_dmac *dmac;
struct s3c2410_dma_client *client;
};
/* All DMACs in the platform */
static LIST_HEAD(dmac_list);
/* All channels to peripherals in the platform */
static LIST_HEAD(chan_list);
/*
* Since we add resources(DMACs and Channels) to the global pool,
* we need to guard access to the resources using a global lock
*/
static DEFINE_SPINLOCK(res_lock);
/* Returns the channel with ID 'id' in the chan_list */
static struct s3c_pl330_chan *id_to_chan(const enum dma_ch id)
{
struct s3c_pl330_chan *ch;
list_for_each_entry(ch, &chan_list, node)
if (ch->id == id)
return ch;
return NULL;
}
/* Allocate a new channel with ID 'id' and add to chan_list */
static void chan_add(const enum dma_ch id)
{
struct s3c_pl330_chan *ch = id_to_chan(id);
/* Return if the channel already exists */
if (ch)
return;
ch = kmalloc(sizeof(*ch), GFP_KERNEL);
/* Return silently to work with other channels */
if (!ch)
return;
ch->id = id;
ch->dmac = NULL;
list_add_tail(&ch->node, &chan_list);
}
/* If the channel is not yet acquired by any client */
static bool chan_free(struct s3c_pl330_chan *ch)
{
if (!ch)
return false;
/* Channel points to some DMAC only when it's acquired */
return ch->dmac ? false : true;
}
/*
* Returns 0 is peripheral i/f is invalid or not present on the dmac.
* Index + 1, otherwise.
*/
static unsigned iface_of_dmac(struct s3c_pl330_dmac *dmac, enum dma_ch ch_id)
{
enum dma_ch *id = dmac->peri;
int i;
/* Discount invalid markers */
if (ch_id == DMACH_MAX)
return 0;
for (i = 0; i < PL330_MAX_PERI; i++)
if (id[i] == ch_id)
return i + 1;
return 0;
}
/* If all channel threads of the DMAC are busy */
static inline bool dmac_busy(struct s3c_pl330_dmac *dmac)
{
struct pl330_info *pi = dmac->pi;
return (dmac->busy_chan < pi->pcfg.num_chan) ? false : true;
}
/*
* Returns the number of free channels that
* can be handled by this dmac only.
*/
static unsigned ch_onlyby_dmac(struct s3c_pl330_dmac *dmac)
{
enum dma_ch *id = dmac->peri;
struct s3c_pl330_dmac *d;
struct s3c_pl330_chan *ch;
unsigned found, count = 0;
enum dma_ch p;
int i;
for (i = 0; i < PL330_MAX_PERI; i++) {
p = id[i];
ch = id_to_chan(p);
if (p == DMACH_MAX || !chan_free(ch))
continue;
found = 0;
list_for_each_entry(d, &dmac_list, node) {
if (d != dmac && iface_of_dmac(d, ch->id)) {
found = 1;
break;
}
}
if (!found)
count++;
}
return count;
}
/*
* Measure of suitability of 'dmac' handling 'ch'
*
* 0 indicates 'dmac' can not handle 'ch' either
* because it is not supported by the hardware or
* because all dmac channels are currently busy.
*
* >0 vlaue indicates 'dmac' has the capability.
* The bigger the value the more suitable the dmac.
*/
#define MAX_SUIT UINT_MAX
#define MIN_SUIT 0
static unsigned suitablility(struct s3c_pl330_dmac *dmac,
struct s3c_pl330_chan *ch)
{
struct pl330_info *pi = dmac->pi;
enum dma_ch *id = dmac->peri;
struct s3c_pl330_dmac *d;
unsigned s;
int i;
s = MIN_SUIT;
/* If all the DMAC channel threads are busy */
if (dmac_busy(dmac))
return s;
for (i = 0; i < PL330_MAX_PERI; i++)
if (id[i] == ch->id)
break;
/* If the 'dmac' can't talk to 'ch' */
if (i == PL330_MAX_PERI)
return s;
s = MAX_SUIT;
list_for_each_entry(d, &dmac_list, node) {
/*
* If some other dmac can talk to this
* peri and has some channel free.
*/
if (d != dmac && iface_of_dmac(d, ch->id) && !dmac_busy(d)) {
s = 0;
break;
}
}
if (s)
return s;
s = 100;
/* Good if free chans are more, bad otherwise */
s += (pi->pcfg.num_chan - dmac->busy_chan) - ch_onlyby_dmac(dmac);
return s;
}
/* More than one DMAC may have capability to transfer data with the
* peripheral. This function assigns most suitable DMAC to manage the
* channel and hence communicate with the peripheral.
*/
static struct s3c_pl330_dmac *map_chan_to_dmac(struct s3c_pl330_chan *ch)
{
struct s3c_pl330_dmac *d, *dmac = NULL;
unsigned sn, sl = MIN_SUIT;
list_for_each_entry(d, &dmac_list, node) {
sn = suitablility(d, ch);
if (sn == MAX_SUIT)
return d;
if (sn > sl)
dmac = d;
}
return dmac;
}
/* Acquire the channel for peripheral 'id' */
static struct s3c_pl330_chan *chan_acquire(const enum dma_ch id)
{
struct s3c_pl330_chan *ch = id_to_chan(id);
struct s3c_pl330_dmac *dmac;
/* If the channel doesn't exist or is already acquired */
if (!ch || !chan_free(ch)) {
ch = NULL;
goto acq_exit;
}
dmac = map_chan_to_dmac(ch);
/* If couldn't map */
if (!dmac) {
ch = NULL;
goto acq_exit;
}
dmac->busy_chan++;
ch->dmac = dmac;
acq_exit:
return ch;
}
/* Delete xfer from the queue */
static inline void del_from_queue(struct s3c_pl330_xfer *xfer)
{
struct s3c_pl330_xfer *t;
struct s3c_pl330_chan *ch;
int found;
if (!xfer)
return;
ch = xfer->chan;
/* Make sure xfer is in the queue */
found = 0;
list_for_each_entry(t, &ch->xfer_list, node)
if (t == xfer) {
found = 1;
break;
}
if (!found)
return;
/* If xfer is last entry in the queue */
if (xfer->node.next == &ch->xfer_list)
t = list_entry(ch->xfer_list.next,
struct s3c_pl330_xfer, node);
else
t = list_entry(xfer->node.next,
struct s3c_pl330_xfer, node);
/* If there was only one node left */
if (t == xfer)
ch->xfer_head = NULL;
else if (ch->xfer_head == xfer)
ch->xfer_head = t;
list_del(&xfer->node);
}
/* Provides pointer to the next xfer in the queue.
* If CIRCULAR option is set, the list is left intact,
* otherwise the xfer is removed from the list.
* Forced delete 'pluck' can be set to override the CIRCULAR option.
*/
static struct s3c_pl330_xfer *get_from_queue(struct s3c_pl330_chan *ch,
int pluck)
{
struct s3c_pl330_xfer *xfer = ch->xfer_head;
if (!xfer)
return NULL;
/* If xfer is last entry in the queue */
if (xfer->node.next == &ch->xfer_list)
ch->xfer_head = list_entry(ch->xfer_list.next,
struct s3c_pl330_xfer, node);
else
ch->xfer_head = list_entry(xfer->node.next,
struct s3c_pl330_xfer, node);
if (pluck || !(ch->options & S3C2410_DMAF_CIRCULAR))
del_from_queue(xfer);
return xfer;
}
static inline void add_to_queue(struct s3c_pl330_chan *ch,
struct s3c_pl330_xfer *xfer, int front)
{
struct pl330_xfer *xt;
/* If queue empty */
if (ch->xfer_head == NULL)
ch->xfer_head = xfer;
xt = &ch->xfer_head->px;
/* If the head already submitted (CIRCULAR head) */
if (ch->options & S3C2410_DMAF_CIRCULAR &&
(xt == ch->req[0].x || xt == ch->req[1].x))
ch->xfer_head = xfer;
/* If this is a resubmission, it should go at the head */
if (front) {
ch->xfer_head = xfer;
list_add(&xfer->node, &ch->xfer_list);
} else {
list_add_tail(&xfer->node, &ch->xfer_list);
}
}
static inline void _finish_off(struct s3c_pl330_xfer *xfer,
enum s3c2410_dma_buffresult res, int ffree)
{
struct s3c_pl330_chan *ch;
if (!xfer)
return;
ch = xfer->chan;
/* Do callback */
if (ch->callback_fn)
ch->callback_fn(NULL, xfer->token, xfer->px.bytes, res);
/* Force Free or if buffer is not needed anymore */
if (ffree || !(ch->options & S3C2410_DMAF_CIRCULAR))
kmem_cache_free(ch->dmac->kmcache, xfer);
}
static inline int s3c_pl330_submit(struct s3c_pl330_chan *ch,
struct pl330_req *r)
{
struct s3c_pl330_xfer *xfer;
int ret = 0;
/* If already submitted */
if (r->x)
return 0;
xfer = get_from_queue(ch, 0);
if (xfer) {
r->x = &xfer->px;
/* Use max bandwidth for M<->M xfers */
if (r->rqtype == MEMTOMEM) {
struct pl330_info *pi = xfer->chan->dmac->pi;
int burst = 1 << ch->rqcfg.brst_size;
u32 bytes = r->x->bytes;
int bl;
bl = pi->pcfg.data_bus_width / 8;
bl *= pi->pcfg.data_buf_dep;
bl /= burst;
/* src/dst_burst_len can't be more than 16 */
if (bl > 16)
bl = 16;
while (bl > 1) {
if (!(bytes % (bl * burst)))
break;
bl--;
}
ch->rqcfg.brst_len = bl;
} else {
ch->rqcfg.brst_len = 1;
}
ret = pl330_submit_req(ch->pl330_chan_id, r);
/* If submission was successful */
if (!ret) {
ch->lrq = r; /* latest submitted req */
return 0;
}
r->x = NULL;
/* If both of the PL330 ping-pong buffers filled */
if (ret == -EAGAIN) {
dev_err(ch->dmac->pi->dev, "%s:%d!\n",
__func__, __LINE__);
/* Queue back again */
add_to_queue(ch, xfer, 1);
ret = 0;
} else {
dev_err(ch->dmac->pi->dev, "%s:%d!\n",
__func__, __LINE__);
_finish_off(xfer, S3C2410_RES_ERR, 0);
}
}
return ret;
}
static void s3c_pl330_rq(struct s3c_pl330_chan *ch,
struct pl330_req *r, enum pl330_op_err err)
{
unsigned long flags;
struct s3c_pl330_xfer *xfer;
struct pl330_xfer *xl = r->x;
enum s3c2410_dma_buffresult res;
spin_lock_irqsave(&res_lock, flags);
r->x = NULL;
s3c_pl330_submit(ch, r);
spin_unlock_irqrestore(&res_lock, flags);
/* Map result to S3C DMA API */
if (err == PL330_ERR_NONE)
res = S3C2410_RES_OK;
else if (err == PL330_ERR_ABORT)
res = S3C2410_RES_ABORT;
else
res = S3C2410_RES_ERR;
/* If last request had some xfer */
if (xl) {
xfer = container_of(xl, struct s3c_pl330_xfer, px);
_finish_off(xfer, res, 0);
} else {
dev_info(ch->dmac->pi->dev, "%s:%d No Xfer?!\n",
__func__, __LINE__);
}
}
static void s3c_pl330_rq0(void *token, enum pl330_op_err err)
{
struct pl330_req *r = token;
struct s3c_pl330_chan *ch = container_of(r,
struct s3c_pl330_chan, req[0]);
s3c_pl330_rq(ch, r, err);
}
static void s3c_pl330_rq1(void *token, enum pl330_op_err err)
{
struct pl330_req *r = token;
struct s3c_pl330_chan *ch = container_of(r,
struct s3c_pl330_chan, req[1]);
s3c_pl330_rq(ch, r, err);
}
/* Release an acquired channel */
static void chan_release(struct s3c_pl330_chan *ch)
{
struct s3c_pl330_dmac *dmac;
if (chan_free(ch))
return;
dmac = ch->dmac;
ch->dmac = NULL;
dmac->busy_chan--;
}
int s3c2410_dma_ctrl(enum dma_ch id, enum s3c2410_chan_op op)
{
struct s3c_pl330_xfer *xfer;
enum pl330_chan_op pl330op;
struct s3c_pl330_chan *ch;
unsigned long flags;
int idx, ret;
spin_lock_irqsave(&res_lock, flags);
ch = id_to_chan(id);
if (!ch || chan_free(ch)) {
ret = -EINVAL;
goto ctrl_exit;
}
switch (op) {
case S3C2410_DMAOP_START:
/* Make sure both reqs are enqueued */
idx = (ch->lrq == &ch->req[0]) ? 1 : 0;
s3c_pl330_submit(ch, &ch->req[idx]);
s3c_pl330_submit(ch, &ch->req[1 - idx]);
pl330op = PL330_OP_START;
break;
case S3C2410_DMAOP_STOP:
pl330op = PL330_OP_ABORT;
break;
case S3C2410_DMAOP_FLUSH:
pl330op = PL330_OP_FLUSH;
break;
case S3C2410_DMAOP_PAUSE:
case S3C2410_DMAOP_RESUME:
case S3C2410_DMAOP_TIMEOUT:
case S3C2410_DMAOP_STARTED:
spin_unlock_irqrestore(&res_lock, flags);
return 0;
default:
spin_unlock_irqrestore(&res_lock, flags);
return -EINVAL;
}
ret = pl330_chan_ctrl(ch->pl330_chan_id, pl330op);
if (pl330op == PL330_OP_START) {
spin_unlock_irqrestore(&res_lock, flags);
return ret;
}
idx = (ch->lrq == &ch->req[0]) ? 1 : 0;
/* Abort the current xfer */
if (ch->req[idx].x) {
xfer = container_of(ch->req[idx].x,
struct s3c_pl330_xfer, px);
/* Drop xfer during FLUSH */
if (pl330op == PL330_OP_FLUSH)
del_from_queue(xfer);
ch->req[idx].x = NULL;
spin_unlock_irqrestore(&res_lock, flags);
_finish_off(xfer, S3C2410_RES_ABORT,
pl330op == PL330_OP_FLUSH ? 1 : 0);
spin_lock_irqsave(&res_lock, flags);
}
/* Flush the whole queue */
if (pl330op == PL330_OP_FLUSH) {
if (ch->req[1 - idx].x) {
xfer = container_of(ch->req[1 - idx].x,
struct s3c_pl330_xfer, px);
del_from_queue(xfer);
ch->req[1 - idx].x = NULL;
spin_unlock_irqrestore(&res_lock, flags);
_finish_off(xfer, S3C2410_RES_ABORT, 1);
spin_lock_irqsave(&res_lock, flags);
}
/* Finish off the remaining in the queue */
xfer = ch->xfer_head;
while (xfer) {
del_from_queue(xfer);
spin_unlock_irqrestore(&res_lock, flags);
_finish_off(xfer, S3C2410_RES_ABORT, 1);
spin_lock_irqsave(&res_lock, flags);
xfer = ch->xfer_head;
}
}
ctrl_exit:
spin_unlock_irqrestore(&res_lock, flags);
return ret;
}
EXPORT_SYMBOL(s3c2410_dma_ctrl);
int s3c2410_dma_enqueue(enum dma_ch id, void *token,
dma_addr_t addr, int size)
{
struct s3c_pl330_chan *ch;
struct s3c_pl330_xfer *xfer;
unsigned long flags;
int idx, ret = 0;
spin_lock_irqsave(&res_lock, flags);
ch = id_to_chan(id);
/* Error if invalid or free channel */
if (!ch || chan_free(ch)) {
ret = -EINVAL;
goto enq_exit;
}
/* Error if size is unaligned */
if (ch->rqcfg.brst_size && size % (1 << ch->rqcfg.brst_size)) {
ret = -EINVAL;
goto enq_exit;
}
xfer = kmem_cache_alloc(ch->dmac->kmcache, GFP_ATOMIC);
if (!xfer) {
ret = -ENOMEM;
goto enq_exit;
}
xfer->token = token;
xfer->chan = ch;
xfer->px.bytes = size;
xfer->px.next = NULL; /* Single request */
/* For S3C DMA API, direction is always fixed for all xfers */
if (ch->req[0].rqtype == MEMTODEV) {
xfer->px.src_addr = addr;
xfer->px.dst_addr = ch->sdaddr;
} else {
xfer->px.src_addr = ch->sdaddr;
xfer->px.dst_addr = addr;
}
add_to_queue(ch, xfer, 0);
/* Try submitting on either request */
idx = (ch->lrq == &ch->req[0]) ? 1 : 0;
if (!ch->req[idx].x)
s3c_pl330_submit(ch, &ch->req[idx]);
else
s3c_pl330_submit(ch, &ch->req[1 - idx]);
spin_unlock_irqrestore(&res_lock, flags);
if (ch->options & S3C2410_DMAF_AUTOSTART)
s3c2410_dma_ctrl(id, S3C2410_DMAOP_START);
return 0;
enq_exit:
spin_unlock_irqrestore(&res_lock, flags);
return ret;
}
EXPORT_SYMBOL(s3c2410_dma_enqueue);
int s3c2410_dma_request(enum dma_ch id,
struct s3c2410_dma_client *client,
void *dev)
{
struct s3c_pl330_dmac *dmac;
struct s3c_pl330_chan *ch;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&res_lock, flags);
ch = chan_acquire(id);
if (!ch) {
ret = -EBUSY;
goto req_exit;
}
dmac = ch->dmac;
ch->pl330_chan_id = pl330_request_channel(dmac->pi);
if (!ch->pl330_chan_id) {
chan_release(ch);
ret = -EBUSY;
goto req_exit;
}
ch->client = client;
ch->options = 0; /* Clear any option */
ch->callback_fn = NULL; /* Clear any callback */
ch->lrq = NULL;
ch->rqcfg.brst_size = 2; /* Default word size */
ch->rqcfg.swap = SWAP_NO;
ch->rqcfg.scctl = SCCTRL0; /* Noncacheable and nonbufferable */
ch->rqcfg.dcctl = DCCTRL0; /* Noncacheable and nonbufferable */
ch->rqcfg.privileged = 0;
ch->rqcfg.insnaccess = 0;
/* Set invalid direction */
ch->req[0].rqtype = DEVTODEV;
ch->req[1].rqtype = ch->req[0].rqtype;
ch->req[0].cfg = &ch->rqcfg;
ch->req[1].cfg = ch->req[0].cfg;
ch->req[0].peri = iface_of_dmac(dmac, id) - 1; /* Original index */
ch->req[1].peri = ch->req[0].peri;
ch->req[0].token = &ch->req[0];
ch->req[0].xfer_cb = s3c_pl330_rq0;
ch->req[1].token = &ch->req[1];
ch->req[1].xfer_cb = s3c_pl330_rq1;
ch->req[0].x = NULL;
ch->req[1].x = NULL;
/* Reset xfer list */
INIT_LIST_HEAD(&ch->xfer_list);
ch->xfer_head = NULL;
req_exit:
spin_unlock_irqrestore(&res_lock, flags);
return ret;
}
EXPORT_SYMBOL(s3c2410_dma_request);
int s3c2410_dma_free(enum dma_ch id, struct s3c2410_dma_client *client)
{
struct s3c_pl330_chan *ch;
struct s3c_pl330_xfer *xfer;
unsigned long flags;
int ret = 0;
unsigned idx;
spin_lock_irqsave(&res_lock, flags);
ch = id_to_chan(id);
if (!ch || chan_free(ch))
goto free_exit;
/* Refuse if someone else wanted to free the channel */
if (ch->client != client) {
ret = -EBUSY;
goto free_exit;
}
/* Stop any active xfer, Flushe the queue and do callbacks */
pl330_chan_ctrl(ch->pl330_chan_id, PL330_OP_FLUSH);
/* Abort the submitted requests */
idx = (ch->lrq == &ch->req[0]) ? 1 : 0;
if (ch->req[idx].x) {
xfer = container_of(ch->req[idx].x,
struct s3c_pl330_xfer, px);
ch->req[idx].x = NULL;
del_from_queue(xfer);
spin_unlock_irqrestore(&res_lock, flags);
_finish_off(xfer, S3C2410_RES_ABORT, 1);
spin_lock_irqsave(&res_lock, flags);
}
if (ch->req[1 - idx].x) {
xfer = container_of(ch->req[1 - idx].x,
struct s3c_pl330_xfer, px);
ch->req[1 - idx].x = NULL;
del_from_queue(xfer);
spin_unlock_irqrestore(&res_lock, flags);
_finish_off(xfer, S3C2410_RES_ABORT, 1);
spin_lock_irqsave(&res_lock, flags);
}
/* Pluck and Abort the queued requests in order */
do {
xfer = get_from_queue(ch, 1);
spin_unlock_irqrestore(&res_lock, flags);
_finish_off(xfer, S3C2410_RES_ABORT, 1);
spin_lock_irqsave(&res_lock, flags);
} while (xfer);
ch->client = NULL;
pl330_release_channel(ch->pl330_chan_id);
ch->pl330_chan_id = NULL;
chan_release(ch);
free_exit:
spin_unlock_irqrestore(&res_lock, flags);
return ret;
}
EXPORT_SYMBOL(s3c2410_dma_free);
int s3c2410_dma_config(enum dma_ch id, int xferunit)
{
struct s3c_pl330_chan *ch;
struct pl330_info *pi;
unsigned long flags;
int i, dbwidth, ret = 0;
spin_lock_irqsave(&res_lock, flags);
ch = id_to_chan(id);
if (!ch || chan_free(ch)) {
ret = -EINVAL;
goto cfg_exit;
}
pi = ch->dmac->pi;
dbwidth = pi->pcfg.data_bus_width / 8;
/* Max size of xfer can be pcfg.data_bus_width */
if (xferunit > dbwidth) {
ret = -EINVAL;
goto cfg_exit;
}
i = 0;
while (xferunit != (1 << i))
i++;
/* If valid value */
if (xferunit == (1 << i))
ch->rqcfg.brst_size = i;
else
ret = -EINVAL;
cfg_exit:
spin_unlock_irqrestore(&res_lock, flags);
return ret;
}
EXPORT_SYMBOL(s3c2410_dma_config);
/* Options that are supported by this driver */
#define S3C_PL330_FLAGS (S3C2410_DMAF_CIRCULAR | S3C2410_DMAF_AUTOSTART)
int s3c2410_dma_setflags(enum dma_ch id, unsigned int options)
{
struct s3c_pl330_chan *ch;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&res_lock, flags);
ch = id_to_chan(id);
if (!ch || chan_free(ch) || options & ~(S3C_PL330_FLAGS))
ret = -EINVAL;
else
ch->options = options;
spin_unlock_irqrestore(&res_lock, flags);
return 0;
}
EXPORT_SYMBOL(s3c2410_dma_setflags);
int s3c2410_dma_set_buffdone_fn(enum dma_ch id, s3c2410_dma_cbfn_t rtn)
{
struct s3c_pl330_chan *ch;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&res_lock, flags);
ch = id_to_chan(id);
if (!ch || chan_free(ch))
ret = -EINVAL;
else
ch->callback_fn = rtn;
spin_unlock_irqrestore(&res_lock, flags);
return ret;
}
EXPORT_SYMBOL(s3c2410_dma_set_buffdone_fn);
int s3c2410_dma_devconfig(enum dma_ch id, enum s3c2410_dmasrc source,
unsigned long address)
{
struct s3c_pl330_chan *ch;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&res_lock, flags);
ch = id_to_chan(id);
if (!ch || chan_free(ch)) {
ret = -EINVAL;
goto devcfg_exit;
}
switch (source) {
case S3C2410_DMASRC_HW: /* P->M */
ch->req[0].rqtype = DEVTOMEM;
ch->req[1].rqtype = DEVTOMEM;
ch->rqcfg.src_inc = 0;
ch->rqcfg.dst_inc = 1;
break;
case S3C2410_DMASRC_MEM: /* M->P */
ch->req[0].rqtype = MEMTODEV;
ch->req[1].rqtype = MEMTODEV;
ch->rqcfg.src_inc = 1;
ch->rqcfg.dst_inc = 0;
break;
default:
ret = -EINVAL;
goto devcfg_exit;
}
ch->sdaddr = address;
devcfg_exit:
spin_unlock_irqrestore(&res_lock, flags);
return ret;
}
EXPORT_SYMBOL(s3c2410_dma_devconfig);
int s3c2410_dma_getposition(enum dma_ch id, dma_addr_t *src, dma_addr_t *dst)
{
struct s3c_pl330_chan *ch = id_to_chan(id);
struct pl330_chanstatus status;
int ret;
if (!ch || chan_free(ch))
return -EINVAL;
ret = pl330_chan_status(ch->pl330_chan_id, &status);
if (ret < 0)
return ret;
*src = status.src_addr;
*dst = status.dst_addr;
return 0;
}
EXPORT_SYMBOL(s3c2410_dma_getposition);
static irqreturn_t pl330_irq_handler(int irq, void *data)
{
if (pl330_update(data))
return IRQ_HANDLED;
else
return IRQ_NONE;
}
static int pl330_probe(struct platform_device *pdev)
{
struct s3c_pl330_dmac *s3c_pl330_dmac;
struct s3c_pl330_platdata *pl330pd;
struct pl330_info *pl330_info;
struct resource *res;
int i, ret, irq;
pl330pd = pdev->dev.platform_data;
/* Can't do without the list of _32_ peripherals */
if (!pl330pd || !pl330pd->peri) {
dev_err(&pdev->dev, "platform data missing!\n");
return -ENODEV;
}
pl330_info = kzalloc(sizeof(*pl330_info), GFP_KERNEL);
if (!pl330_info)
return -ENOMEM;
pl330_info->pl330_data = NULL;
pl330_info->dev = &pdev->dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENODEV;
goto probe_err1;
}
request_mem_region(res->start, resource_size(res), pdev->name);
pl330_info->base = ioremap(res->start, resource_size(res));
if (!pl330_info->base) {
ret = -ENXIO;
goto probe_err2;
}
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
ret = irq;
goto probe_err3;
}
ret = request_irq(irq, pl330_irq_handler, 0,
dev_name(&pdev->dev), pl330_info);
if (ret)
goto probe_err4;
/* Allocate a new DMAC */
s3c_pl330_dmac = kmalloc(sizeof(*s3c_pl330_dmac), GFP_KERNEL);
if (!s3c_pl330_dmac) {
ret = -ENOMEM;
goto probe_err5;
}
/* Get operation clock and enable it */
s3c_pl330_dmac->clk = clk_get(&pdev->dev, "pdma");
if (IS_ERR(s3c_pl330_dmac->clk)) {
dev_err(&pdev->dev, "Cannot get operation clock.\n");
ret = -EINVAL;
goto probe_err6;
}
clk_enable(s3c_pl330_dmac->clk);
ret = pl330_add(pl330_info);
if (ret)
goto probe_err7;
/* Hook the info */
s3c_pl330_dmac->pi = pl330_info;
/* No busy channels */
s3c_pl330_dmac->busy_chan = 0;
s3c_pl330_dmac->kmcache = kmem_cache_create(dev_name(&pdev->dev),
sizeof(struct s3c_pl330_xfer), 0, 0, NULL);
if (!s3c_pl330_dmac->kmcache) {
ret = -ENOMEM;
goto probe_err8;
}
/* Get the list of peripherals */
s3c_pl330_dmac->peri = pl330pd->peri;
/* Attach to the list of DMACs */
list_add_tail(&s3c_pl330_dmac->node, &dmac_list);
/* Create a channel for each peripheral in the DMAC
* that is, if it doesn't already exist
*/
for (i = 0; i < PL330_MAX_PERI; i++)
if (s3c_pl330_dmac->peri[i] != DMACH_MAX)
chan_add(s3c_pl330_dmac->peri[i]);
printk(KERN_INFO
"Loaded driver for PL330 DMAC-%d %s\n", pdev->id, pdev->name);
printk(KERN_INFO
"\tDBUFF-%ux%ubytes Num_Chans-%u Num_Peri-%u Num_Events-%u\n",
pl330_info->pcfg.data_buf_dep,
pl330_info->pcfg.data_bus_width / 8, pl330_info->pcfg.num_chan,
pl330_info->pcfg.num_peri, pl330_info->pcfg.num_events);
return 0;
probe_err8:
pl330_del(pl330_info);
probe_err7:
clk_disable(s3c_pl330_dmac->clk);
clk_put(s3c_pl330_dmac->clk);
probe_err6:
kfree(s3c_pl330_dmac);
probe_err5:
free_irq(irq, pl330_info);
probe_err4:
probe_err3:
iounmap(pl330_info->base);
probe_err2:
release_mem_region(res->start, resource_size(res));
probe_err1:
kfree(pl330_info);
return ret;
}
static int pl330_remove(struct platform_device *pdev)
{
struct s3c_pl330_dmac *dmac, *d;
struct s3c_pl330_chan *ch;
unsigned long flags;
int del, found;
if (!pdev->dev.platform_data)
return -EINVAL;
spin_lock_irqsave(&res_lock, flags);
found = 0;
list_for_each_entry(d, &dmac_list, node)
if (d->pi->dev == &pdev->dev) {
found = 1;
break;
}
if (!found) {
spin_unlock_irqrestore(&res_lock, flags);
return 0;
}
dmac = d;
/* Remove all Channels that are managed only by this DMAC */
list_for_each_entry(ch, &chan_list, node) {
/* Only channels that are handled by this DMAC */
if (iface_of_dmac(dmac, ch->id))
del = 1;
else
continue;
/* Don't remove if some other DMAC has it too */
list_for_each_entry(d, &dmac_list, node)
if (d != dmac && iface_of_dmac(d, ch->id)) {
del = 0;
break;
}
if (del) {
spin_unlock_irqrestore(&res_lock, flags);
s3c2410_dma_free(ch->id, ch->client);
spin_lock_irqsave(&res_lock, flags);
list_del(&ch->node);
kfree(ch);
}
}
/* Disable operation clock */
clk_disable(dmac->clk);
clk_put(dmac->clk);
/* Remove the DMAC */
list_del(&dmac->node);
kfree(dmac);
spin_unlock_irqrestore(&res_lock, flags);
return 0;
}
static struct platform_driver pl330_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "s3c-pl330",
},
.probe = pl330_probe,
.remove = pl330_remove,
};
static int __init pl330_init(void)
{
return platform_driver_register(&pl330_driver);
}
module_init(pl330_init);
static void __exit pl330_exit(void)
{
platform_driver_unregister(&pl330_driver);
return;
}
module_exit(pl330_exit);
MODULE_AUTHOR("Jaswinder Singh <jassi.brar@samsung.com>");
MODULE_DESCRIPTION("Driver for PL330 DMA Controller");
MODULE_LICENSE("GPL");
drivers/dma/Kconfig
浏览文件 @ 0745c9a5
......@@ -193,7 +193,8 @@ config ARCH_HAS_ASYNC_TX_FIND_CHANNEL
config PL330_DMA
tristate "DMA API Driver for PL330"
select DMA_ENGINE
depends on PL330
depends on ARM_AMBA
select PL330
help
Select if your platform has one or more PL330 DMACs.
You need to provide platform specific settings via
......
drivers/dma/pl330.c
浏览文件 @ 0745c9a5
......@@ -17,6 +17,8 @@
#include <linux/interrupt.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl330.h>
#include <linux/pm_runtime.h>
#include <linux/scatterlist.h>
#define NR_DEFAULT_DESC 16
......@@ -68,6 +70,14 @@ struct dma_pl330_chan {
* NULL if the channel is available to be acquired.
*/
void *pl330_chid;
/* For D-to-M and M-to-D channels */
int burst_sz; /* the peripheral fifo width */
int burst_len; /* the number of burst */
dma_addr_t fifo_addr;
/* for cyclic capability */
bool cyclic;
};
struct dma_pl330_dmac {
......@@ -83,6 +93,8 @@ struct dma_pl330_dmac {
/* Peripheral channels connected to this DMAC */
struct dma_pl330_chan *peripherals; /* keep at end */
struct clk *clk;
};
struct dma_pl330_desc {
......@@ -152,6 +164,31 @@ static inline void free_desc_list(struct list_head *list)
spin_unlock_irqrestore(&pdmac->pool_lock, flags);
}
static inline void handle_cyclic_desc_list(struct list_head *list)
{
struct dma_pl330_desc *desc;
struct dma_pl330_chan *pch;
unsigned long flags;
if (list_empty(list))
return;
list_for_each_entry(desc, list, node) {
dma_async_tx_callback callback;
/* Change status to reload it */
desc->status = PREP;
pch = desc->pchan;
callback = desc->txd.callback;
if (callback)
callback(desc->txd.callback_param);
}
spin_lock_irqsave(&pch->lock, flags);
list_splice_tail_init(list, &pch->work_list);
spin_unlock_irqrestore(&pch->lock, flags);
}
static inline void fill_queue(struct dma_pl330_chan *pch)
{
struct dma_pl330_desc *desc;
......@@ -205,7 +242,10 @@ static void pl330_tasklet(unsigned long data)
spin_unlock_irqrestore(&pch->lock, flags);
free_desc_list(&list);
if (pch->cyclic)
handle_cyclic_desc_list(&list);
else
free_desc_list(&list);
}
static void dma_pl330_rqcb(void *token, enum pl330_op_err err)
......@@ -236,6 +276,7 @@ static int pl330_alloc_chan_resources(struct dma_chan *chan)
spin_lock_irqsave(&pch->lock, flags);
pch->completed = chan->cookie = 1;
pch->cyclic = false;
pch->pl330_chid = pl330_request_channel(&pdmac->pif);
if (!pch->pl330_chid) {
......@@ -253,25 +294,52 @@ static int pl330_alloc_chan_resources(struct dma_chan *chan)
static int pl330_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd, unsigned long arg)
{
struct dma_pl330_chan *pch = to_pchan(chan);
struct dma_pl330_desc *desc;
struct dma_pl330_desc *desc, *_dt;
unsigned long flags;
struct dma_pl330_dmac *pdmac = pch->dmac;
struct dma_slave_config *slave_config;
LIST_HEAD(list);
/* Only supports DMA_TERMINATE_ALL */
if (cmd != DMA_TERMINATE_ALL)
return -ENXIO;
spin_lock_irqsave(&pch->lock, flags);
/* FLUSH the PL330 Channel thread */
pl330_chan_ctrl(pch->pl330_chid, PL330_OP_FLUSH);
switch (cmd) {
case DMA_TERMINATE_ALL:
spin_lock_irqsave(&pch->lock, flags);
/* Mark all desc done */
list_for_each_entry(desc, &pch->work_list, node)
desc->status = DONE;
/* FLUSH the PL330 Channel thread */
pl330_chan_ctrl(pch->pl330_chid, PL330_OP_FLUSH);
spin_unlock_irqrestore(&pch->lock, flags);
/* Mark all desc done */
list_for_each_entry_safe(desc, _dt, &pch->work_list , node) {
desc->status = DONE;
pch->completed = desc->txd.cookie;
list_move_tail(&desc->node, &list);
}
pl330_tasklet((unsigned long) pch);
list_splice_tail_init(&list, &pdmac->desc_pool);
spin_unlock_irqrestore(&pch->lock, flags);
break;
case DMA_SLAVE_CONFIG:
slave_config = (struct dma_slave_config *)arg;
if (slave_config->direction == DMA_TO_DEVICE) {
if (slave_config->dst_addr)
pch->fifo_addr = slave_config->dst_addr;
if (slave_config->dst_addr_width)
pch->burst_sz = __ffs(slave_config->dst_addr_width);
if (slave_config->dst_maxburst)
pch->burst_len = slave_config->dst_maxburst;
} else if (slave_config->direction == DMA_FROM_DEVICE) {
if (slave_config->src_addr)
pch->fifo_addr = slave_config->src_addr;
if (slave_config->src_addr_width)
pch->burst_sz = __ffs(slave_config->src_addr_width);
if (slave_config->src_maxburst)
pch->burst_len = slave_config->src_maxburst;
}
break;
default:
dev_err(pch->dmac->pif.dev, "Not supported command.\n");
return -ENXIO;
}
return 0;
}
......@@ -288,6 +356,9 @@ static void pl330_free_chan_resources(struct dma_chan *chan)
pl330_release_channel(pch->pl330_chid);
pch->pl330_chid = NULL;
if (pch->cyclic)
list_splice_tail_init(&pch->work_list, &pch->dmac->desc_pool);
spin_unlock_irqrestore(&pch->lock, flags);
}
......@@ -453,7 +524,7 @@ static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch)
if (peri) {
desc->req.rqtype = peri->rqtype;
desc->req.peri = peri->peri_id;
desc->req.peri = pch->chan.chan_id;
} else {
desc->req.rqtype = MEMTOMEM;
desc->req.peri = 0;
......@@ -524,6 +595,51 @@ static inline int get_burst_len(struct dma_pl330_desc *desc, size_t len)
return burst_len;
}
static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
struct dma_chan *chan, dma_addr_t dma_addr, size_t len,
size_t period_len, enum dma_data_direction direction)
{
struct dma_pl330_desc *desc;
struct dma_pl330_chan *pch = to_pchan(chan);
dma_addr_t dst;
dma_addr_t src;
desc = pl330_get_desc(pch);
if (!desc) {
dev_err(pch->dmac->pif.dev, "%s:%d Unable to fetch desc\n",
__func__, __LINE__);
return NULL;
}
switch (direction) {
case DMA_TO_DEVICE:
desc->rqcfg.src_inc = 1;
desc->rqcfg.dst_inc = 0;
src = dma_addr;
dst = pch->fifo_addr;
break;
case DMA_FROM_DEVICE:
desc->rqcfg.src_inc = 0;
desc->rqcfg.dst_inc = 1;
src = pch->fifo_addr;
dst = dma_addr;
break;
default:
dev_err(pch->dmac->pif.dev, "%s:%d Invalid dma direction\n",
__func__, __LINE__);
return NULL;
}
desc->rqcfg.brst_size = pch->burst_sz;
desc->rqcfg.brst_len = 1;
pch->cyclic = true;
fill_px(&desc->px, dst, src, period_len);
return &desc->txd;
}
static struct dma_async_tx_descriptor *
pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
dma_addr_t src, size_t len, unsigned long flags)
......@@ -579,7 +695,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
struct dma_pl330_peri *peri = chan->private;
struct scatterlist *sg;
unsigned long flags;
int i, burst_size;
int i;
dma_addr_t addr;
if (unlikely(!pch || !sgl || !sg_len || !peri))
......@@ -595,8 +711,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
return NULL;
}
addr = peri->fifo_addr;
burst_size = peri->burst_sz;
addr = pch->fifo_addr;
first = NULL;
......@@ -644,7 +759,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
sg_dma_address(sg), addr, sg_dma_len(sg));
}
desc->rqcfg.brst_size = burst_size;
desc->rqcfg.brst_size = pch->burst_sz;
desc->rqcfg.brst_len = 1;
}
......@@ -696,6 +811,30 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
goto probe_err1;
}
pdmac->clk = clk_get(&adev->dev, "dma");
if (IS_ERR(pdmac->clk)) {
dev_err(&adev->dev, "Cannot get operation clock.\n");
ret = -EINVAL;
goto probe_err1;
}
amba_set_drvdata(adev, pdmac);
#ifdef CONFIG_PM_RUNTIME
/* to use the runtime PM helper functions */
pm_runtime_enable(&adev->dev);
/* enable the power domain */
if (pm_runtime_get_sync(&adev->dev)) {
dev_err(&adev->dev, "failed to get runtime pm\n");
ret = -ENODEV;
goto probe_err1;
}
#else
/* enable dma clk */
clk_enable(pdmac->clk);
#endif
irq = adev->irq[0];
ret = request_irq(irq, pl330_irq_handler, 0,
dev_name(&adev->dev), pi);
......@@ -732,6 +871,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
case MEMTODEV:
case DEVTOMEM:
dma_cap_set(DMA_SLAVE, pd->cap_mask);
dma_cap_set(DMA_CYCLIC, pd->cap_mask);
break;
default:
dev_err(&adev->dev, "DEVTODEV Not Supported\n");
......@@ -758,6 +898,7 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
pd->device_alloc_chan_resources = pl330_alloc_chan_resources;
pd->device_free_chan_resources = pl330_free_chan_resources;
pd->device_prep_dma_memcpy = pl330_prep_dma_memcpy;
pd->device_prep_dma_cyclic = pl330_prep_dma_cyclic;
pd->device_tx_status = pl330_tx_status;
pd->device_prep_slave_sg = pl330_prep_slave_sg;
pd->device_control = pl330_control;
......@@ -769,8 +910,6 @@ pl330_probe(struct amba_device *adev, const struct amba_id *id)
goto probe_err4;
}
amba_set_drvdata(adev, pdmac);
dev_info(&adev->dev,
"Loaded driver for PL330 DMAC-%d\n", adev->periphid);
dev_info(&adev->dev,
......@@ -831,6 +970,13 @@ static int __devexit pl330_remove(struct amba_device *adev)
res = &adev->res;
release_mem_region(res->start, resource_size(res));
#ifdef CONFIG_PM_RUNTIME
pm_runtime_put(&adev->dev);
pm_runtime_disable(&adev->dev);
#else
clk_disable(pdmac->clk);
#endif
kfree(pdmac);
return 0;
......@@ -844,10 +990,49 @@ static struct amba_id pl330_ids[] = {
{ 0, 0 },
};
#ifdef CONFIG_PM_RUNTIME
static int pl330_runtime_suspend(struct device *dev)
{
struct dma_pl330_dmac *pdmac = dev_get_drvdata(dev);
if (!pdmac) {
dev_err(dev, "failed to get dmac\n");
return -ENODEV;
}
clk_disable(pdmac->clk);
return 0;
}
static int pl330_runtime_resume(struct device *dev)
{
struct dma_pl330_dmac *pdmac = dev_get_drvdata(dev);
if (!pdmac) {
dev_err(dev, "failed to get dmac\n");
return -ENODEV;
}
clk_enable(pdmac->clk);
return 0;
}
#else
#define pl330_runtime_suspend NULL
#define pl330_runtime_resume NULL
#endif /* CONFIG_PM_RUNTIME */
static const struct dev_pm_ops pl330_pm_ops = {
.runtime_suspend = pl330_runtime_suspend,
.runtime_resume = pl330_runtime_resume,
};
static struct amba_driver pl330_driver = {
.drv = {
.owner = THIS_MODULE,
.name = "dma-pl330",
.pm = &pl330_pm_ops,
},
.id_table = pl330_ids,
.probe = pl330_probe,
......
drivers/mmc/host/s3cmci.c
浏览文件 @ 0745c9a5
......@@ -913,9 +913,9 @@ static void finalize_request(struct s3cmci_host *host)
}
static void s3cmci_dma_setup(struct s3cmci_host *host,
enum s3c2410_dmasrc source)
enum dma_data_direction source)
{
static enum s3c2410_dmasrc last_source = -1;
static enum dma_data_direction last_source = -1;
static int setup_ok;
if (last_source == source)
......@@ -1087,7 +1087,7 @@ static int s3cmci_prepare_dma(struct s3cmci_host *host, struct mmc_data *data)
BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR);
s3cmci_dma_setup(host, rw ? S3C2410_DMASRC_MEM : S3C2410_DMASRC_HW);
s3cmci_dma_setup(host, rw ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);
dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
......
drivers/spi/spi-s3c64xx.c
浏览文件 @ 0745c9a5
......@@ -131,6 +131,12 @@
#define RXBUSY (1<<2)
#define TXBUSY (1<<3)
struct s3c64xx_spi_dma_data {
unsigned ch;
enum dma_data_direction direction;
enum dma_ch dmach;
};
/**
* struct s3c64xx_spi_driver_data - Runtime info holder for SPI driver.
* @clk: Pointer to the spi clock.
......@@ -164,13 +170,14 @@ struct s3c64xx_spi_driver_data {
struct work_struct work;
struct list_head queue;
spinlock_t lock;
enum dma_ch rx_dmach;
enum dma_ch tx_dmach;
unsigned long sfr_start;
struct completion xfer_completion;
unsigned state;
unsigned cur_mode, cur_bpw;
unsigned cur_speed;
struct s3c64xx_spi_dma_data rx_dma;
struct s3c64xx_spi_dma_data tx_dma;
struct samsung_dma_ops *ops;
};
static struct s3c2410_dma_client s3c64xx_spi_dma_client = {
......@@ -226,6 +233,78 @@ static void flush_fifo(struct s3c64xx_spi_driver_data *sdd)
writel(val, regs + S3C64XX_SPI_CH_CFG);
}
static void s3c64xx_spi_dmacb(void *data)
{
struct s3c64xx_spi_driver_data *sdd;
struct s3c64xx_spi_dma_data *dma = data;
unsigned long flags;
if (dma->direction == DMA_FROM_DEVICE)
sdd = container_of(data,
struct s3c64xx_spi_driver_data, rx_dma);
else
sdd = container_of(data,
struct s3c64xx_spi_driver_data, tx_dma);
spin_lock_irqsave(&sdd->lock, flags);
if (dma->direction == DMA_FROM_DEVICE) {
sdd->state &= ~RXBUSY;
if (!(sdd->state & TXBUSY))
complete(&sdd->xfer_completion);
} else {
sdd->state &= ~TXBUSY;
if (!(sdd->state & RXBUSY))
complete(&sdd->xfer_completion);
}
spin_unlock_irqrestore(&sdd->lock, flags);
}
static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
unsigned len, dma_addr_t buf)
{
struct s3c64xx_spi_driver_data *sdd;
struct samsung_dma_prep_info info;
if (dma->direction == DMA_FROM_DEVICE)
sdd = container_of((void *)dma,
struct s3c64xx_spi_driver_data, rx_dma);
else
sdd = container_of((void *)dma,
struct s3c64xx_spi_driver_data, tx_dma);
info.cap = DMA_SLAVE;
info.len = len;
info.fp = s3c64xx_spi_dmacb;
info.fp_param = dma;
info.direction = dma->direction;
info.buf = buf;
sdd->ops->prepare(dma->ch, &info);
sdd->ops->trigger(dma->ch);
}
static int acquire_dma(struct s3c64xx_spi_driver_data *sdd)
{
struct samsung_dma_info info;
sdd->ops = samsung_dma_get_ops();
info.cap = DMA_SLAVE;
info.client = &s3c64xx_spi_dma_client;
info.width = sdd->cur_bpw / 8;
info.direction = sdd->rx_dma.direction;
info.fifo = sdd->sfr_start + S3C64XX_SPI_RX_DATA;
sdd->rx_dma.ch = sdd->ops->request(sdd->rx_dma.dmach, &info);
info.direction = sdd->tx_dma.direction;
info.fifo = sdd->sfr_start + S3C64XX_SPI_TX_DATA;
sdd->tx_dma.ch = sdd->ops->request(sdd->tx_dma.dmach, &info);
return 1;
}
static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
struct spi_device *spi,
struct spi_transfer *xfer, int dma_mode)
......@@ -258,10 +337,7 @@ static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
chcfg |= S3C64XX_SPI_CH_TXCH_ON;
if (dma_mode) {
modecfg |= S3C64XX_SPI_MODE_TXDMA_ON;
s3c2410_dma_config(sdd->tx_dmach, sdd->cur_bpw / 8);
s3c2410_dma_enqueue(sdd->tx_dmach, (void *)sdd,
xfer->tx_dma, xfer->len);
s3c2410_dma_ctrl(sdd->tx_dmach, S3C2410_DMAOP_START);
prepare_dma(&sdd->tx_dma, xfer->len, xfer->tx_dma);
} else {
switch (sdd->cur_bpw) {
case 32:
......@@ -293,10 +369,7 @@ static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
writel(((xfer->len * 8 / sdd->cur_bpw) & 0xffff)
| S3C64XX_SPI_PACKET_CNT_EN,
regs + S3C64XX_SPI_PACKET_CNT);
s3c2410_dma_config(sdd->rx_dmach, sdd->cur_bpw / 8);
s3c2410_dma_enqueue(sdd->rx_dmach, (void *)sdd,
xfer->rx_dma, xfer->len);
s3c2410_dma_ctrl(sdd->rx_dmach, S3C2410_DMAOP_START);
prepare_dma(&sdd->rx_dma, xfer->len, xfer->rx_dma);
}
}
......@@ -482,46 +555,6 @@ static void s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd)
}
}
static void s3c64xx_spi_dma_rxcb(struct s3c2410_dma_chan *chan, void *buf_id,
int size, enum s3c2410_dma_buffresult res)
{
struct s3c64xx_spi_driver_data *sdd = buf_id;
unsigned long flags;
spin_lock_irqsave(&sdd->lock, flags);
if (res == S3C2410_RES_OK)
sdd->state &= ~RXBUSY;
else
dev_err(&sdd->pdev->dev, "DmaAbrtRx-%d\n", size);
/* If the other done */
if (!(sdd->state & TXBUSY))
complete(&sdd->xfer_completion);
spin_unlock_irqrestore(&sdd->lock, flags);
}
static void s3c64xx_spi_dma_txcb(struct s3c2410_dma_chan *chan, void *buf_id,
int size, enum s3c2410_dma_buffresult res)
{
struct s3c64xx_spi_driver_data *sdd = buf_id;
unsigned long flags;
spin_lock_irqsave(&sdd->lock, flags);
if (res == S3C2410_RES_OK)
sdd->state &= ~TXBUSY;
else
dev_err(&sdd->pdev->dev, "DmaAbrtTx-%d \n", size);
/* If the other done */
if (!(sdd->state & RXBUSY))
complete(&sdd->xfer_completion);
spin_unlock_irqrestore(&sdd->lock, flags);
}
#define XFER_DMAADDR_INVALID DMA_BIT_MASK(32)
static int s3c64xx_spi_map_mssg(struct s3c64xx_spi_driver_data *sdd,
......@@ -696,12 +729,10 @@ static void handle_msg(struct s3c64xx_spi_driver_data *sdd,
if (use_dma) {
if (xfer->tx_buf != NULL
&& (sdd->state & TXBUSY))
s3c2410_dma_ctrl(sdd->tx_dmach,
S3C2410_DMAOP_FLUSH);
sdd->ops->stop(sdd->tx_dma.ch);
if (xfer->rx_buf != NULL
&& (sdd->state & RXBUSY))
s3c2410_dma_ctrl(sdd->rx_dmach,
S3C2410_DMAOP_FLUSH);
sdd->ops->stop(sdd->rx_dma.ch);
}
goto out;
......@@ -739,30 +770,6 @@ static void handle_msg(struct s3c64xx_spi_driver_data *sdd,
msg->complete(msg->context);
}
static int acquire_dma(struct s3c64xx_spi_driver_data *sdd)
{
if (s3c2410_dma_request(sdd->rx_dmach,
&s3c64xx_spi_dma_client, NULL) < 0) {
dev_err(&sdd->pdev->dev, "cannot get RxDMA\n");
return 0;
}
s3c2410_dma_set_buffdone_fn(sdd->rx_dmach, s3c64xx_spi_dma_rxcb);
s3c2410_dma_devconfig(sdd->rx_dmach, S3C2410_DMASRC_HW,
sdd->sfr_start + S3C64XX_SPI_RX_DATA);
if (s3c2410_dma_request(sdd->tx_dmach,
&s3c64xx_spi_dma_client, NULL) < 0) {
dev_err(&sdd->pdev->dev, "cannot get TxDMA\n");
s3c2410_dma_free(sdd->rx_dmach, &s3c64xx_spi_dma_client);
return 0;
}
s3c2410_dma_set_buffdone_fn(sdd->tx_dmach, s3c64xx_spi_dma_txcb);
s3c2410_dma_devconfig(sdd->tx_dmach, S3C2410_DMASRC_MEM,
sdd->sfr_start + S3C64XX_SPI_TX_DATA);
return 1;
}
static void s3c64xx_spi_work(struct work_struct *work)
{
struct s3c64xx_spi_driver_data *sdd = container_of(work,
......@@ -799,8 +806,8 @@ static void s3c64xx_spi_work(struct work_struct *work)
spin_unlock_irqrestore(&sdd->lock, flags);
/* Free DMA channels */
s3c2410_dma_free(sdd->tx_dmach, &s3c64xx_spi_dma_client);
s3c2410_dma_free(sdd->rx_dmach, &s3c64xx_spi_dma_client);
sdd->ops->release(sdd->rx_dma.ch, &s3c64xx_spi_dma_client);
sdd->ops->release(sdd->tx_dma.ch, &s3c64xx_spi_dma_client);
}
static int s3c64xx_spi_transfer(struct spi_device *spi,
......@@ -1017,8 +1024,10 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
sdd->cntrlr_info = sci;
sdd->pdev = pdev;
sdd->sfr_start = mem_res->start;
sdd->tx_dmach = dmatx_res->start;
sdd->rx_dmach = dmarx_res->start;
sdd->tx_dma.dmach = dmatx_res->start;
sdd->tx_dma.direction = DMA_TO_DEVICE;
sdd->rx_dma.dmach = dmarx_res->start;
sdd->rx_dma.direction = DMA_FROM_DEVICE;
sdd->cur_bpw = 8;
......@@ -1106,7 +1115,7 @@ static int __init s3c64xx_spi_probe(struct platform_device *pdev)
pdev->id, master->num_chipselect);
dev_dbg(&pdev->dev, "\tIOmem=[0x%x-0x%x]\tDMA=[Rx-%d, Tx-%d]\n",
mem_res->end, mem_res->start,
sdd->rx_dmach, sdd->tx_dmach);
sdd->rx_dma.dmach, sdd->tx_dma.dmach);
return 0;
......
include/linux/amba/pl330.h
浏览文件 @ 0745c9a5
......@@ -19,12 +19,8 @@ struct dma_pl330_peri {
* Peri_Req i/f of the DMAC that is
* peripheral could be reached from.
*/
u8 peri_id; /* {0, 31} */
u8 peri_id; /* specific dma id */
enum pl330_reqtype rqtype;
/* For M->D and D->M Channels */
int burst_sz; /* in power of 2 */
dma_addr_t fifo_addr;
};
struct dma_pl330_platdata {
......
sound/soc/samsung/ac97.c
浏览文件 @ 0745c9a5
......@@ -271,7 +271,10 @@ static int s3c_ac97_trigger(struct snd_pcm_substream *substream, int cmd,
writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED);
if (!dma_data->ops)
dma_data->ops = samsung_dma_get_ops();
dma_data->ops->started(dma_data->channel);
return 0;
}
......@@ -317,7 +320,10 @@ static int s3c_ac97_mic_trigger(struct snd_pcm_substream *substream,
writel(ac_glbctrl, s3c_ac97.regs + S3C_AC97_GLBCTRL);
s3c2410_dma_ctrl(dma_data->channel, S3C2410_DMAOP_STARTED);
if (!dma_data->ops)
dma_data->ops = samsung_dma_get_ops();
dma_data->ops->started(dma_data->channel);
return 0;
}
......
sound/soc/samsung/dma.c
浏览文件 @ 0745c9a5
......@@ -54,7 +54,6 @@ struct runtime_data {
spinlock_t lock;
int state;
unsigned int dma_loaded;
unsigned int dma_limit;
unsigned int dma_period;
dma_addr_t dma_start;
dma_addr_t dma_pos;
......@@ -62,77 +61,79 @@ struct runtime_data {
struct s3c_dma_params *params;
};
static void audio_buffdone(void *data);
/* dma_enqueue
*
* place a dma buffer onto the queue for the dma system
* to handle.
*/
*/
static void dma_enqueue(struct snd_pcm_substream *substream)
{
struct runtime_data *prtd = substream->runtime->private_data;
dma_addr_t pos = prtd->dma_pos;
unsigned int limit;
int ret;
struct samsung_dma_prep_info dma_info;
pr_debug("Entered %s\n", __func__);
if (s3c_dma_has_circular())
limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;
else
limit = prtd->dma_limit;
limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period;
pr_debug("%s: loaded %d, limit %d\n",
__func__, prtd->dma_loaded, limit);
while (prtd->dma_loaded < limit) {
unsigned long len = prtd->dma_period;
dma_info.cap = (samsung_dma_has_circular() ? DMA_CYCLIC : DMA_SLAVE);
dma_info.direction =
(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
? DMA_TO_DEVICE : DMA_FROM_DEVICE);
dma_info.fp = audio_buffdone;
dma_info.fp_param = substream;
dma_info.period = prtd->dma_period;
dma_info.len = prtd->dma_period*limit;
while (prtd->dma_loaded < limit) {
pr_debug("dma_loaded: %d\n", prtd->dma_loaded);
if ((pos + len) > prtd->dma_end) {
len = prtd->dma_end - pos;
pr_debug("%s: corrected dma len %ld\n", __func__, len);
if ((pos + dma_info.period) > prtd->dma_end) {
dma_info.period = prtd->dma_end - pos;
pr_debug("%s: corrected dma len %ld\n",
__func__, dma_info.period);
}
ret = s3c2410_dma_enqueue(prtd->params->channel,
substream, pos, len);
dma_info.buf = pos;
prtd->params->ops->prepare(prtd->params->ch, &dma_info);
if (ret == 0) {
prtd->dma_loaded++;
pos += prtd->dma_period;
if (pos >= prtd->dma_end)
pos = prtd->dma_start;
} else
break;
prtd->dma_loaded++;
pos += prtd->dma_period;
if (pos >= prtd->dma_end)
pos = prtd->dma_start;
}
prtd->dma_pos = pos;
}
static void audio_buffdone(struct s3c2410_dma_chan *channel,
void *dev_id, int size,
enum s3c2410_dma_buffresult result)
static void audio_buffdone(void *data)
{
struct snd_pcm_substream *substream = dev_id;
struct runtime_data *prtd;
struct snd_pcm_substream *substream = data;
struct runtime_data *prtd = substream->runtime->private_data;
pr_debug("Entered %s\n", __func__);
if (result == S3C2410_RES_ABORT || result == S3C2410_RES_ERR)
return;
prtd = substream->runtime->private_data;
if (prtd->state & ST_RUNNING) {
prtd->dma_pos += prtd->dma_period;
if (prtd->dma_pos >= prtd->dma_end)
prtd->dma_pos = prtd->dma_start;
if (substream)
snd_pcm_period_elapsed(substream);
if (substream)
snd_pcm_period_elapsed(substream);
spin_lock(&prtd->lock);
if (prtd->state & ST_RUNNING && !s3c_dma_has_circular()) {
prtd->dma_loaded--;
dma_enqueue(substream);
spin_lock(&prtd->lock);
if (!samsung_dma_has_circular()) {
prtd->dma_loaded--;
dma_enqueue(substream);
}
spin_unlock(&prtd->lock);
}
spin_unlock(&prtd->lock);
}
static int dma_hw_params(struct snd_pcm_substream *substream,
......@@ -144,8 +145,7 @@ static int dma_hw_params(struct snd_pcm_substream *substream,
unsigned long totbytes = params_buffer_bytes(params);
struct s3c_dma_params *dma =
snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
int ret = 0;
struct samsung_dma_info dma_info;
pr_debug("Entered %s\n", __func__);
......@@ -163,30 +163,26 @@ static int dma_hw_params(struct snd_pcm_substream *substream,
pr_debug("params %p, client %p, channel %d\n", prtd->params,
prtd->params->client, prtd->params->channel);
ret = s3c2410_dma_request(prtd->params->channel,
prtd->params->client, NULL);
if (ret < 0) {
printk(KERN_ERR "failed to get dma channel\n");
return ret;
}
/* use the circular buffering if we have it available. */
if (s3c_dma_has_circular())
s3c2410_dma_setflags(prtd->params->channel,
S3C2410_DMAF_CIRCULAR);
prtd->params->ops = samsung_dma_get_ops();
dma_info.cap = (samsung_dma_has_circular() ?
DMA_CYCLIC : DMA_SLAVE);
dma_info.client = prtd->params->client;
dma_info.direction =
(substream->stream == SNDRV_PCM_STREAM_PLAYBACK
? DMA_TO_DEVICE : DMA_FROM_DEVICE);
dma_info.width = prtd->params->dma_size;
dma_info.fifo = prtd->params->dma_addr;
prtd->params->ch = prtd->params->ops->request(
prtd->params->channel, &dma_info);
}
s3c2410_dma_set_buffdone_fn(prtd->params->channel,
audio_buffdone);
snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
runtime->dma_bytes = totbytes;
spin_lock_irq(&prtd->lock);
prtd->dma_loaded = 0;
prtd->dma_limit = runtime->hw.periods_min;
prtd->dma_period = params_period_bytes(params);
prtd->dma_start = runtime->dma_addr;
prtd->dma_pos = prtd->dma_start;
......@@ -206,7 +202,8 @@ static int dma_hw_free(struct snd_pcm_substream *substream)
snd_pcm_set_runtime_buffer(substream, NULL);
if (prtd->params) {
s3c2410_dma_free(prtd->params->channel, prtd->params->client);
prtd->params->ops->release(prtd->params->ch,
prtd->params->client);
prtd->params = NULL;
}
......@@ -225,23 +222,9 @@ static int dma_prepare(struct snd_pcm_substream *substream)
if (!prtd->params)
return 0;
/* channel needs configuring for mem=>device, increment memory addr,
* sync to pclk, half-word transfers to the IIS-FIFO. */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
s3c2410_dma_devconfig(prtd->params->channel,
S3C2410_DMASRC_MEM,
prtd->params->dma_addr);
} else {
s3c2410_dma_devconfig(prtd->params->channel,
S3C2410_DMASRC_HW,
prtd->params->dma_addr);
}
s3c2410_dma_config(prtd->params->channel,
prtd->params->dma_size);
/* flush the DMA channel */
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_FLUSH);
prtd->params->ops->flush(prtd->params->ch);
prtd->dma_loaded = 0;
prtd->dma_pos = prtd->dma_start;
......@@ -265,14 +248,14 @@ static int dma_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
prtd->state |= ST_RUNNING;
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_START);
prtd->params->ops->trigger(prtd->params->ch);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
prtd->state &= ~ST_RUNNING;
s3c2410_dma_ctrl(prtd->params->channel, S3C2410_DMAOP_STOP);
prtd->params->ops->stop(prtd->params->ch);
break;
default:
......@@ -291,21 +274,12 @@ dma_pointer(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct runtime_data *prtd = runtime->private_data;
unsigned long res;
dma_addr_t src, dst;
pr_debug("Entered %s\n", __func__);
spin_lock(&prtd->lock);
s3c2410_dma_getposition(prtd->params->channel, &src, &dst);
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
res = dst - prtd->dma_start;
else
res = src - prtd->dma_start;
spin_unlock(&prtd->lock);
res = prtd->dma_pos - prtd->dma_start;
pr_debug("Pointer %x %x\n", src, dst);
pr_debug("Pointer offset: %lu\n", res);
/* we seem to be getting the odd error from the pcm library due
* to out-of-bounds pointers. this is maybe due to the dma engine
......
sound/soc/samsung/dma.h
浏览文件 @ 0745c9a5
......@@ -6,7 +6,7 @@
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* ALSA PCM interface for the Samsung S3C24xx CPU
* ALSA PCM interface for the Samsung SoC
*/
#ifndef _S3C_AUDIO_H
......@@ -17,6 +17,8 @@ struct s3c_dma_params {
int channel; /* Channel ID */
dma_addr_t dma_addr;
int dma_size; /* Size of the DMA transfer */
unsigned ch;
struct samsung_dma_ops *ops;
};
#endif
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