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Commit d7e9d01a authored by Angelo Dureghello's avatar Angelo Dureghello Committed by Greg Ungerer
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m68k: add ColdFire mcf5441x eDMA platform support 



This patch adds support for ColdFire eDMA platform driver.

Signed-off-by: default avatarAngelo Dureghello <angelo@sysam.it>
Signed-off-by: default avatarGreg Ungerer <gerg@linux-m68k.org>
parent 5908e6b7

arch/m68k/coldfire/device.c

+81 −0
Original line number Diff line number Diff line
@@ -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

};



/*

arch/m68k/coldfire/m5441x.c

+2 −2
Original line number Diff line number Diff line
@@ -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 */

arch/m68k/include/asm/m5441xsim.h

+15 −0
Original line number Diff line number Diff line
@@ -282,6 +282,21 @@ 
 *  DSPI module.

 */

#define MCFDSPI_BASE0		0xfc05c000

#define MCFDSPI_BASE1		0xfC03c000

#define MCF_IRQ_DSPI0		(MCFINT0_VECBASE + MCFINT0_DSPI0)

#define MCF_IRQ_DSPI1		(MCFINT1_VECBASE + MCFINT1_DSPI1)

/*

 *  eDMA module.

 */

#define MCFEDMA_BASE		0xfc044000

#define MCFEDMA_SIZE		0x4000

#define MCFINT0_EDMA_INTR0	8

#define MCFINT0_EDMA_ERR	24

#define MCFEDMA_EDMA_INTR16	8

#define MCFEDMA_EDMA_INTR56	0

#define MCFEDMA_IRQ_INTR0	(MCFINT0_VECBASE + MCFINT0_EDMA_INTR0)

#define MCFEDMA_IRQ_INTR16	(MCFINT1_VECBASE + MCFEDMA_EDMA_INTR16)

#define MCFEDMA_IRQ_INTR56	(MCFINT2_VECBASE + MCFEDMA_EDMA_INTR56)

#define MCFEDMA_IRQ_ERR	(MCFINT0_VECBASE + MCFINT0_EDMA_ERR)



#endif /* m5441xsim_h */