On Fri, Oct 11, 2013 at 11:01:33AM +0200, Heiko Stübner wrote:
> s3c2410 and s3c2442 share the same dma channels while s3c2440 has
> slight differences. But on all three the reachable sources per dma
> channel has constraints attached and thus encodes the usable
> combinations using the S3C24XX_DMA_CHANREQ macro.
>
> This also fixes the warning about s3c2410_dma_resource being unused
> as reported by Olof Johansson.
Perhpas you should have used Reported-by tag for that..
~Vinod
>
> Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
> ---
> arch/arm/mach-s3c24xx/common.c | 100 +++++++++++++++++++++++++++++
> arch/arm/mach-s3c24xx/common.h | 2 +
> include/linux/platform_data/dma-s3c24xx.h | 3 +
> 3 files changed, 105 insertions(+)
>
> diff --git a/arch/arm/mach-s3c24xx/common.c b/arch/arm/mach-s3c24xx/common.c
> index 16ac669..4cfe7a4 100644
> --- a/arch/arm/mach-s3c24xx/common.c
> +++ b/arch/arm/mach-s3c24xx/common.c
> @@ -343,6 +343,50 @@ static struct resource s3c2410_dma_resource[] = {
> };
> #endif
>
> +#if defined(CONFIG_CPU_S3C2410) || defined(CONFIG_CPU_S3C2442)
> +static struct s3c24xx_dma_channel s3c2410_dma_channels[DMACH_MAX] = {
> + [DMACH_XD0] = { S3C24XX_DMA_AHB, true, S3C24XX_DMA_CHANREQ(0, 0), },
> + [DMACH_XD1] = { S3C24XX_DMA_AHB, true, S3C24XX_DMA_CHANREQ(0, 1), },
> + [DMACH_SDI] = { S3C24XX_DMA_APB, false, S3C24XX_DMA_CHANREQ(2, 0) |
> + S3C24XX_DMA_CHANREQ(2, 2) |
> + S3C24XX_DMA_CHANREQ(1, 3),
> + },
> + [DMACH_SPI0] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(3, 1), },
> + [DMACH_SPI1] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(2, 3), },
> + [DMACH_UART0] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(1, 0), },
> + [DMACH_UART1] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(1, 1), },
> + [DMACH_UART2] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(0, 3), },
> + [DMACH_TIMER] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(3, 0) |
> + S3C24XX_DMA_CHANREQ(3, 2) |
> + S3C24XX_DMA_CHANREQ(3, 3),
> + },
> + [DMACH_I2S_IN] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(2, 1) |
> + S3C24XX_DMA_CHANREQ(1, 2),
> + },
> + [DMACH_I2S_OUT] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(0, 2), },
> + [DMACH_USB_EP1] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(4, 0), },
> + [DMACH_USB_EP2] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(4, 1), },
> + [DMACH_USB_EP3] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(4, 2), },
> + [DMACH_USB_EP4] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(4, 3), },
> +};
> +
> +static struct s3c24xx_dma_platdata s3c2410_dma_platdata = {
> + .num_phy_channels = 4,
> + .channels = s3c2410_dma_channels,
> + .num_channels = DMACH_MAX,
> +};
> +
> +struct platform_device s3c2410_device_dma = {
> + .name = "s3c2410-dma",
> + .id = 0,
> + .num_resources = ARRAY_SIZE(s3c2410_dma_resource),
> + .resource = s3c2410_dma_resource,
> + .dev = {
> + .platform_data = &s3c2410_dma_platdata,
> + },
> +};
> +#endif
> +
> #ifdef CONFIG_CPU_S3C2412
> static struct s3c24xx_dma_channel s3c2412_dma_channels[DMACH_MAX] = {
> [DMACH_XD0] = { S3C24XX_DMA_AHB, true, 17 },
> @@ -384,6 +428,62 @@ struct platform_device s3c2412_device_dma = {
> };
> #endif
>
> +#if defined(CONFIG_CPU_S3C2440)
> +static struct s3c24xx_dma_channel s3c2440_dma_channels[DMACH_MAX] = {
> + [DMACH_XD0] = { S3C24XX_DMA_AHB, true, S3C24XX_DMA_CHANREQ(0, 0), },
> + [DMACH_XD1] = { S3C24XX_DMA_AHB, true, S3C24XX_DMA_CHANREQ(0, 1), },
> + [DMACH_SDI] = { S3C24XX_DMA_APB, false, S3C24XX_DMA_CHANREQ(2, 0) |
> + S3C24XX_DMA_CHANREQ(6, 1) |
> + S3C24XX_DMA_CHANREQ(2, 2) |
> + S3C24XX_DMA_CHANREQ(1, 3),
> + },
> + [DMACH_SPI0] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(3, 1), },
> + [DMACH_SPI1] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(2, 3), },
> + [DMACH_UART0] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(1, 0), },
> + [DMACH_UART1] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(1, 1), },
> + [DMACH_UART2] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(0, 3), },
> + [DMACH_TIMER] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(3, 0) |
> + S3C24XX_DMA_CHANREQ(3, 2) |
> + S3C24XX_DMA_CHANREQ(3, 3),
> + },
> + [DMACH_I2S_IN] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(2, 1) |
> + S3C24XX_DMA_CHANREQ(1, 2),
> + },
> + [DMACH_I2S_OUT] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(5, 0) |
> + S3C24XX_DMA_CHANREQ(0, 2),
> + },
> + [DMACH_PCM_IN] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(6, 0) |
> + S3C24XX_DMA_CHANREQ(5, 2),
> + },
> + [DMACH_PCM_OUT] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(5, 1) |
> + S3C24XX_DMA_CHANREQ(6, 3),
> + },
> + [DMACH_MIC_IN] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(6, 2) |
> + S3C24XX_DMA_CHANREQ(5, 3),
> + },
> + [DMACH_USB_EP1] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(4, 0), },
> + [DMACH_USB_EP2] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(4, 1), },
> + [DMACH_USB_EP3] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(4, 2), },
> + [DMACH_USB_EP4] = { S3C24XX_DMA_APB, true, S3C24XX_DMA_CHANREQ(4, 3), },
> +};
> +
> +static struct s3c24xx_dma_platdata s3c2440_dma_platdata = {
> + .num_phy_channels = 4,
> + .channels = s3c2440_dma_channels,
> + .num_channels = DMACH_MAX,
> +};
> +
> +struct platform_device s3c2440_device_dma = {
> + .name = "s3c2410-dma",
> + .id = 0,
> + .num_resources = ARRAY_SIZE(s3c2410_dma_resource),
> + .resource = s3c2410_dma_resource,
> + .dev = {
> + .platform_data = &s3c2440_dma_platdata,
> + },
> +};
> +#endif
> +
> #if defined(CONFIG_CPUS_3C2443) || defined(CONFIG_CPU_S3C2416)
> static struct resource s3c2443_dma_resource[] = {
> [0] = DEFINE_RES_MEM(S3C24XX_PA_DMA, S3C24XX_SZ_DMA),
> diff --git a/arch/arm/mach-s3c24xx/common.h b/arch/arm/mach-s3c24xx/common.h
> index fe07189..e46c104 100644
> --- a/arch/arm/mach-s3c24xx/common.h
> +++ b/arch/arm/mach-s3c24xx/common.h
> @@ -109,7 +109,9 @@ extern void s3c2443_init_irq(void);
>
> extern struct syscore_ops s3c24xx_irq_syscore_ops;
>
> +extern struct platform_device s3c2410_device_dma;
> extern struct platform_device s3c2412_device_dma;
> +extern struct platform_device s3c2440_device_dma;
> extern struct platform_device s3c2443_device_dma;
>
> #endif /* __ARCH_ARM_MACH_S3C24XX_COMMON_H */
> diff --git a/include/linux/platform_data/dma-s3c24xx.h b/include/linux/platform_data/dma-s3c24xx.h
> index 5a0cfff..89ba1b0 100644
> --- a/include/linux/platform_data/dma-s3c24xx.h
> +++ b/include/linux/platform_data/dma-s3c24xx.h
> @@ -9,6 +9,9 @@
> * any later version.
> */
>
> +/* Helper to encode the source selection constraints for early s3c socs. */
> +#define S3C24XX_DMA_CHANREQ(src, chan) ((BIT(3) | src) << chan * 4)
> +
> enum s3c24xx_dma_bus {
> S3C24XX_DMA_APB,
> S3C24XX_DMA_AHB,
> --
> 1.7.10.4
>
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