Commit 338c4991 authored by Max Filippov's avatar Max Filippov Committed by Simon Horman
Browse files

ARM: shmobile: r8a7778: add HPB-DMAC support 



Add HPB-DMAC platform device on R8A7778 SoC along with its slave and channel
configurations (only for SDHI0 so far).

Signed-off-by: default avatarMax Filippov <max.filippov@cogentembedded.com>
[Sergei: moved *enum* declaring HPB-DMAC slave IDs from now removed <mach/dma.h>
to <mach/r8a7778.h>, removed #include <mach/dma.h> from setup-r8a7778.c, removed
SSI-related *enum* values and SSI-related data from hpb_dmae_slaves[] and
hpb_dmae_channels[], moved the comments after the element initializers of
hpb_dmae_channels[].]
Signed-off-by: default avatarSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent 9f754b4a

arch/arm/mach-shmobile/include/mach/r8a7778.h

+8 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2013  Renesas Solutions Corp.

 * Copyright (C) 2013  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

 * Copyright (C) 2013  Cogent Embedded, Inc.

 *

 * 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
@@ -21,6 +22,13 @@ 
#include <linux/sh_eth.h>

#include <linux/platform_data/camera-rcar.h>



/* HPB-DMA slave IDs */

enum {

	HPBDMA_SLAVE_DUMMY,

	HPBDMA_SLAVE_SDHI0_TX,

	HPBDMA_SLAVE_SDHI0_RX,

};



extern void r8a7778_add_standard_devices(void);

extern void r8a7778_add_standard_devices_dt(void);

extern void r8a7778_add_ether_device(struct sh_eth_plat_data *pdata);

arch/arm/mach-shmobile/setup-r8a7778.c

+85 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/irqchip/arm-gic.h>

#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/platform_data/dma-rcar-hpbdma.h>

#include <linux/platform_data/gpio-rcar.h>

#include <linux/platform_data/irq-renesas-intc-irqpin.h>

#include <linux/platform_device.h>
@@ -356,6 +357,88 @@ void __init r8a7778_add_dt_devices(void) 
	r8a7778_register_tmu(1);

}



/* HPB-DMA */



/* Asynchronous mode register (ASYNCMDR) bits */

#define HPB_DMAE_ASYNCMDR_ASMD22_MASK	BIT(2)	/* SDHI0 */

#define HPB_DMAE_ASYNCMDR_ASMD22_SINGLE	BIT(2)	/* SDHI0 */

#define HPB_DMAE_ASYNCMDR_ASMD22_MULTI	0	/* SDHI0 */

#define HPB_DMAE_ASYNCMDR_ASMD21_MASK	BIT(1)	/* SDHI0 */

#define HPB_DMAE_ASYNCMDR_ASMD21_SINGLE	BIT(1)	/* SDHI0 */

#define HPB_DMAE_ASYNCMDR_ASMD21_MULTI	0	/* SDHI0 */



static const struct hpb_dmae_slave_config hpb_dmae_slaves[] = {

	{

		.id	= HPBDMA_SLAVE_SDHI0_TX,

		.addr	= 0xffe4c000 + 0x30,

		.dcr	= HPB_DMAE_DCR_SPDS_16BIT |

			  HPB_DMAE_DCR_DMDL |

			  HPB_DMAE_DCR_DPDS_16BIT,

		.rstr	= HPB_DMAE_ASYNCRSTR_ASRST21 |

			  HPB_DMAE_ASYNCRSTR_ASRST22 |

			  HPB_DMAE_ASYNCRSTR_ASRST23,

		.mdr	= HPB_DMAE_ASYNCMDR_ASMD21_MULTI,

		.mdm	= HPB_DMAE_ASYNCMDR_ASMD21_MASK,

		.port	= 0x0D0C,

		.flags	= HPB_DMAE_SET_ASYNC_RESET | HPB_DMAE_SET_ASYNC_MODE,

		.dma_ch	= 21,

	}, {

		.id	= HPBDMA_SLAVE_SDHI0_RX,

		.addr	= 0xffe4c000 + 0x30,

		.dcr	= HPB_DMAE_DCR_SMDL |

			  HPB_DMAE_DCR_SPDS_16BIT |

			  HPB_DMAE_DCR_DPDS_16BIT,

		.rstr	= HPB_DMAE_ASYNCRSTR_ASRST21 |

			  HPB_DMAE_ASYNCRSTR_ASRST22 |

			  HPB_DMAE_ASYNCRSTR_ASRST23,

		.mdr	= HPB_DMAE_ASYNCMDR_ASMD22_MULTI,

		.mdm	= HPB_DMAE_ASYNCMDR_ASMD22_MASK,

		.port	= 0x0D0C,

		.flags	= HPB_DMAE_SET_ASYNC_RESET | HPB_DMAE_SET_ASYNC_MODE,

		.dma_ch	= 22,

	},

};



static const struct hpb_dmae_channel hpb_dmae_channels[] = {

	HPB_DMAE_CHANNEL(0x7e, HPBDMA_SLAVE_SDHI0_TX), /* ch. 21 */

	HPB_DMAE_CHANNEL(0x7e, HPBDMA_SLAVE_SDHI0_RX), /* ch. 22 */

};



static struct hpb_dmae_pdata dma_platform_data __initdata = {

	.slaves			= hpb_dmae_slaves,

	.num_slaves		= ARRAY_SIZE(hpb_dmae_slaves),

	.channels		= hpb_dmae_channels,

	.num_channels		= ARRAY_SIZE(hpb_dmae_channels),

	.ts_shift		= {

		[XMIT_SZ_8BIT]	= 0,

		[XMIT_SZ_16BIT]	= 1,

		[XMIT_SZ_32BIT]	= 2,

	},

	.num_hw_channels	= 39,

};



static struct resource hpb_dmae_resources[] __initdata = {

	/* Channel registers */

	DEFINE_RES_MEM(0xffc08000, 0x1000),

	/* Common registers */

	DEFINE_RES_MEM(0xffc09000, 0x170),

	/* Asynchronous reset registers */

	DEFINE_RES_MEM(0xffc00300, 4),

	/* Asynchronous mode registers */

	DEFINE_RES_MEM(0xffc00400, 4),

	/* IRQ for DMA channels */

	DEFINE_RES_NAMED(gic_iid(0x7b), 5, NULL, IORESOURCE_IRQ),

};



static void __init r8a7778_register_hpb_dmae(void)

{

	platform_device_register_resndata(&platform_bus, "hpb-dma-engine", -1,

					  hpb_dmae_resources,

					  ARRAY_SIZE(hpb_dmae_resources),

					  &dma_platform_data,

					  sizeof(dma_platform_data));

}



void __init r8a7778_add_standard_devices(void)

{

	r8a7778_add_dt_devices();
@@ -366,6 +449,8 @@ void __init r8a7778_add_standard_devices(void) 
	r8a7778_register_hspi(0);

	r8a7778_register_hspi(1);

	r8a7778_register_hspi(2);



	r8a7778_register_hpb_dmae();

}



void __init r8a7778_init_late(void)

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