diff options
| author | Angelo Dureghello <angelo@sysam.it> | 2019-01-19 21:14:41 +0100 |
|---|---|---|
| committer | Greg Ungerer <gerg@kernel.org> | 2019-02-25 11:04:05 +1000 |
| commit | d7e9d01ac2920959b474c6363dba269a868f4db9 (patch) | |
| tree | 48fd5a66786a79df6a0f8880133db007540f1dd2 /arch/m68k/coldfire | |
| parent | 5908e6b738e3357af42c10e1183753c70a0117a9 (diff) | |
m68k: add ColdFire mcf5441x eDMA platform support
This patch adds support for ColdFire eDMA platform driver.
Signed-off-by: Angelo Dureghello <angelo@sysam.it>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Diffstat (limited to 'arch/m68k/coldfire')
| -rw-r--r-- | arch/m68k/coldfire/device.c | 81 | ||||
| -rw-r--r-- | arch/m68k/coldfire/m5441x.c | 4 |
2 files changed, 83 insertions, 2 deletions
diff --git a/arch/m68k/coldfire/device.c b/arch/m68k/coldfire/device.c index 908d58347790..b4103b6bfdeb 100644 --- a/arch/m68k/coldfire/device.c +++ b/arch/m68k/coldfire/device.c @@ -14,11 +14,14 @@ #include <linux/spi/spi.h> #include <linux/gpio.h> #include <linux/fec.h> +#include <linux/dmaengine.h> #include <asm/traps.h> #include <asm/coldfire.h> #include <asm/mcfsim.h> #include <asm/mcfuart.h> #include <asm/mcfqspi.h> +#include <linux/platform_data/edma.h> +#include <linux/platform_data/dma-mcf-edma.h> /* * All current ColdFire parts contain from 2, 3, 4 or 10 UARTS. @@ -476,6 +479,81 @@ static struct platform_device mcf_i2c5 = { #endif /* MCFI2C_BASE5 */ #endif /* IS_ENABLED(CONFIG_I2C_IMX) */ +#if IS_ENABLED(CONFIG_MCF_EDMA) + +static const struct dma_slave_map mcf_edma_map[] = { + { "dreq0", "rx-tx", MCF_EDMA_FILTER_PARAM(0) }, + { "dreq1", "rx-tx", MCF_EDMA_FILTER_PARAM(1) }, + { "uart.0", "rx", MCF_EDMA_FILTER_PARAM(2) }, + { "uart.0", "tx", MCF_EDMA_FILTER_PARAM(3) }, + { "uart.1", "rx", MCF_EDMA_FILTER_PARAM(4) }, + { "uart.1", "tx", MCF_EDMA_FILTER_PARAM(5) }, + { "uart.2", "rx", MCF_EDMA_FILTER_PARAM(6) }, + { "uart.2", "tx", MCF_EDMA_FILTER_PARAM(7) }, + { "timer0", "rx-tx", MCF_EDMA_FILTER_PARAM(8) }, + { "timer1", "rx-tx", MCF_EDMA_FILTER_PARAM(9) }, + { "timer2", "rx-tx", MCF_EDMA_FILTER_PARAM(10) }, + { "timer3", "rx-tx", MCF_EDMA_FILTER_PARAM(11) }, + { "fsl-dspi.0", "rx", MCF_EDMA_FILTER_PARAM(12) }, + { "fsl-dspi.0", "tx", MCF_EDMA_FILTER_PARAM(13) }, + { "fsl-dspi.1", "rx", MCF_EDMA_FILTER_PARAM(14) }, + { "fsl-dspi.1", "tx", MCF_EDMA_FILTER_PARAM(15) }, +}; + +static struct mcf_edma_platform_data mcf_edma_data = { + .dma_channels = 64, + .slave_map = mcf_edma_map, + .slavecnt = ARRAY_SIZE(mcf_edma_map), +}; + +static struct resource mcf_edma_resources[] = { + { + .start = MCFEDMA_BASE, + .end = MCFEDMA_BASE + MCFEDMA_SIZE - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = MCFEDMA_IRQ_INTR0, + .end = MCFEDMA_IRQ_INTR0 + 15, + .flags = IORESOURCE_IRQ, + .name = "edma-tx-00-15", + }, + { + .start = MCFEDMA_IRQ_INTR16, + .end = MCFEDMA_IRQ_INTR16 + 39, + .flags = IORESOURCE_IRQ, + .name = "edma-tx-16-55", + }, + { + .start = MCFEDMA_IRQ_INTR56, + .end = MCFEDMA_IRQ_INTR56, + .flags = IORESOURCE_IRQ, + .name = "edma-tx-56-63", + }, + { + .start = MCFEDMA_IRQ_ERR, + .end = MCFEDMA_IRQ_ERR, + .flags = IORESOURCE_IRQ, + .name = "edma-err", + }, +}; + +static u64 mcf_edma_dmamask = DMA_BIT_MASK(32); + +static struct platform_device mcf_edma = { + .name = "mcf-edma", + .id = 0, + .num_resources = ARRAY_SIZE(mcf_edma_resources), + .resource = mcf_edma_resources, + .dev = { + .dma_mask = &mcf_edma_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &mcf_edma_data, + } +}; + +#endif /* IS_ENABLED(CONFIG_MCF_EDMA) */ + static struct platform_device *mcf_devices[] __initdata = { &mcf_uart, #if IS_ENABLED(CONFIG_FEC) @@ -505,6 +583,9 @@ static struct platform_device *mcf_devices[] __initdata = { &mcf_i2c5, #endif #endif +#if IS_ENABLED(CONFIG_MCF_EDMA) + &mcf_edma, +#endif }; /* diff --git a/arch/m68k/coldfire/m5441x.c b/arch/m68k/coldfire/m5441x.c index 55392af845fb..5bd24c9b865d 100644 --- a/arch/m68k/coldfire/m5441x.c +++ b/arch/m68k/coldfire/m5441x.c @@ -137,6 +137,8 @@ struct clk *mcf_clks[] = { static struct clk * const enable_clks[] __initconst = { /* make sure these clocks are enabled */ + &__clk_0_15, /* dspi.1 */ + &__clk_0_17, /* eDMA */ &__clk_0_18, /* intc0 */ &__clk_0_19, /* intc0 */ &__clk_0_20, /* intc0 */ @@ -157,8 +159,6 @@ static struct clk * const disable_clks[] __initconst = { &__clk_0_8, /* can.0 */ &__clk_0_9, /* can.1 */ &__clk_0_14, /* i2c.1 */ - &__clk_0_15, /* dspi.1 */ - &__clk_0_17, /* eDMA */ &__clk_0_22, /* i2c.0 */ &__clk_0_23, /* dspi.0 */ &__clk_0_28, /* tmr.1 */ |