1. 根目录:
2. arch
3. arm
4. mach-exynos
5. dma.c

/* linux/arch/arm/mach-exynos4/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>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/dma-mapping.h>
#include <linux/amba/bus.h>
#include <linux/amba/pl330.h>
#include <linux/of.h>

#include <asm/irq.h>
#include <plat/devs.h>
#include <plat/irqs.h>
#include <plat/cpu.h>

#include <mach/map.h>
#include <mach/irqs.h>
#include <mach/dma.h>

static u8 exynos4210_pdma0_peri[] = {
	DMACH_PCM0_RX,
	DMACH_PCM0_TX,
	DMACH_PCM2_RX,
	DMACH_PCM2_TX,
	DMACH_MSM_REQ0,
	DMACH_MSM_REQ2,
	DMACH_SPI0_RX,
	DMACH_SPI0_TX,
	DMACH_SPI2_RX,
	DMACH_SPI2_TX,
	DMACH_I2S0S_TX,
	DMACH_I2S0_RX,
	DMACH_I2S0_TX,
	DMACH_I2S2_RX,
	DMACH_I2S2_TX,
	DMACH_UART0_RX,
	DMACH_UART0_TX,
	DMACH_UART2_RX,
	DMACH_UART2_TX,
	DMACH_UART4_RX,
	DMACH_UART4_TX,
	DMACH_SLIMBUS0_RX,
	DMACH_SLIMBUS0_TX,
	DMACH_SLIMBUS2_RX,
	DMACH_SLIMBUS2_TX,
	DMACH_SLIMBUS4_RX,
	DMACH_SLIMBUS4_TX,
	DMACH_AC97_MICIN,
	DMACH_AC97_PCMIN,
	DMACH_AC97_PCMOUT,
};

static u8 exynos4212_pdma0_peri[] = {
	DMACH_PCM0_RX,
	DMACH_PCM0_TX,
	DMACH_PCM2_RX,
	DMACH_PCM2_TX,
	DMACH_MIPI_HSI0,
	DMACH_MIPI_HSI1,
	DMACH_SPI0_RX,
	DMACH_SPI0_TX,
	DMACH_SPI2_RX,
	DMACH_SPI2_TX,
	DMACH_I2S0S_TX,
	DMACH_I2S0_RX,
	DMACH_I2S0_TX,
	DMACH_I2S2_RX,
	DMACH_I2S2_TX,
	DMACH_UART0_RX,
	DMACH_UART0_TX,
	DMACH_UART2_RX,
	DMACH_UART2_TX,
	DMACH_UART4_RX,
	DMACH_UART4_TX,
	DMACH_SLIMBUS0_RX,
	DMACH_SLIMBUS0_TX,
	DMACH_SLIMBUS2_RX,
	DMACH_SLIMBUS2_TX,
	DMACH_SLIMBUS4_RX,
	DMACH_SLIMBUS4_TX,
	DMACH_AC97_MICIN,
	DMACH_AC97_PCMIN,
	DMACH_AC97_PCMOUT,
	DMACH_MIPI_HSI4,
	DMACH_MIPI_HSI5,
};

static u8 exynos5250_pdma0_peri[] = {
	DMACH_PCM0_RX,
	DMACH_PCM0_TX,
	DMACH_PCM2_RX,
	DMACH_PCM2_TX,
	DMACH_SPI0_RX,
	DMACH_SPI0_TX,
	DMACH_SPI2_RX,
	DMACH_SPI2_TX,
	DMACH_I2S0S_TX,
	DMACH_I2S0_RX,
	DMACH_I2S0_TX,
	DMACH_I2S2_RX,
	DMACH_I2S2_TX,
	DMACH_UART0_RX,
	DMACH_UART0_TX,
	DMACH_UART2_RX,
	DMACH_UART2_TX,
	DMACH_UART4_RX,
	DMACH_UART4_TX,
	DMACH_SLIMBUS0_RX,
	DMACH_SLIMBUS0_TX,
	DMACH_SLIMBUS2_RX,
	DMACH_SLIMBUS2_TX,
	DMACH_SLIMBUS4_RX,
	DMACH_SLIMBUS4_TX,
	DMACH_AC97_MICIN,
	DMACH_AC97_PCMIN,
	DMACH_AC97_PCMOUT,
	DMACH_MIPI_HSI0,
	DMACH_MIPI_HSI2,
	DMACH_MIPI_HSI4,
	DMACH_MIPI_HSI6,
};

static struct dma_pl330_platdata exynos_pdma0_pdata;

static AMBA_AHB_DEVICE(exynos_pdma0, "dma-pl330.0", 0x00041330,
	EXYNOS4_PA_PDMA0, {EXYNOS4_IRQ_PDMA0}, &exynos_pdma0_pdata);

static u8 exynos4210_pdma1_peri[] = {
	DMACH_PCM0_RX,
	DMACH_PCM0_TX,
	DMACH_PCM1_RX,
	DMACH_PCM1_TX,
	DMACH_MSM_REQ1,
	DMACH_MSM_REQ3,
	DMACH_SPI1_RX,
	DMACH_SPI1_TX,
	DMACH_I2S0S_TX,
	DMACH_I2S0_RX,
	DMACH_I2S0_TX,
	DMACH_I2S1_RX,
	DMACH_I2S1_TX,
	DMACH_UART0_RX,
	DMACH_UART0_TX,
	DMACH_UART1_RX,
	DMACH_UART1_TX,
	DMACH_UART3_RX,
	DMACH_UART3_TX,
	DMACH_SLIMBUS1_RX,
	DMACH_SLIMBUS1_TX,
	DMACH_SLIMBUS3_RX,
	DMACH_SLIMBUS3_TX,
	DMACH_SLIMBUS5_RX,
	DMACH_SLIMBUS5_TX,
};

static u8 exynos4212_pdma1_peri[] = {
	DMACH_PCM0_RX,
	DMACH_PCM0_TX,
	DMACH_PCM1_RX,
	DMACH_PCM1_TX,
	DMACH_MIPI_HSI2,
	DMACH_MIPI_HSI3,
	DMACH_SPI1_RX,
	DMACH_SPI1_TX,
	DMACH_I2S0S_TX,
	DMACH_I2S0_RX,
	DMACH_I2S0_TX,
	DMACH_I2S1_RX,
	DMACH_I2S1_TX,
	DMACH_UART0_RX,
	DMACH_UART0_TX,
	DMACH_UART1_RX,
	DMACH_UART1_TX,
	DMACH_UART3_RX,
	DMACH_UART3_TX,
	DMACH_SLIMBUS1_RX,
	DMACH_SLIMBUS1_TX,
	DMACH_SLIMBUS3_RX,
	DMACH_SLIMBUS3_TX,
	DMACH_SLIMBUS5_RX,
	DMACH_SLIMBUS5_TX,
	DMACH_SLIMBUS0AUX_RX,
	DMACH_SLIMBUS0AUX_TX,
	DMACH_SPDIF,
	DMACH_MIPI_HSI6,
	DMACH_MIPI_HSI7,
};

static u8 exynos5250_pdma1_peri[] = {
	DMACH_PCM0_RX,
	DMACH_PCM0_TX,
	DMACH_PCM1_RX,
	DMACH_PCM1_TX,
	DMACH_SPI1_RX,
	DMACH_SPI1_TX,
	DMACH_PWM,
	DMACH_SPDIF,
	DMACH_I2S0S_TX,
	DMACH_I2S0_RX,
	DMACH_I2S0_TX,
	DMACH_I2S1_RX,
	DMACH_I2S1_TX,
	DMACH_UART0_RX,
	DMACH_UART0_TX,
	DMACH_UART1_RX,
	DMACH_UART1_TX,
	DMACH_UART3_RX,
	DMACH_UART3_TX,
	DMACH_SLIMBUS1_RX,
	DMACH_SLIMBUS1_TX,
	DMACH_SLIMBUS3_RX,
	DMACH_SLIMBUS3_TX,
	DMACH_SLIMBUS5_RX,
	DMACH_SLIMBUS5_TX,
	DMACH_SLIMBUS0AUX_RX,
	DMACH_SLIMBUS0AUX_TX,
	DMACH_DISP1,
	DMACH_MIPI_HSI1,
	DMACH_MIPI_HSI3,
	DMACH_MIPI_HSI5,
	DMACH_MIPI_HSI7,
};

static struct dma_pl330_platdata exynos_pdma1_pdata;

static AMBA_AHB_DEVICE(exynos_pdma1,  "dma-pl330.1", 0x00041330,
	EXYNOS4_PA_PDMA1, {EXYNOS4_IRQ_PDMA1}, &exynos_pdma1_pdata);

static u8 mdma_peri[] = {
	DMACH_MTOM_0,
	DMACH_MTOM_1,
	DMACH_MTOM_2,
	DMACH_MTOM_3,
	DMACH_MTOM_4,
	DMACH_MTOM_5,
	DMACH_MTOM_6,
	DMACH_MTOM_7,
};

static struct dma_pl330_platdata exynos_mdma1_pdata = {
	.nr_valid_peri = ARRAY_SIZE(mdma_peri),
	.peri_id = mdma_peri,
};

static AMBA_AHB_DEVICE(exynos_mdma1,  "dma-pl330.2", 0x00041330,
	EXYNOS4_PA_MDMA1, {EXYNOS4_IRQ_MDMA1}, &exynos_mdma1_pdata);

static int __init exynos_dma_init(void)
{
	if (of_have_populated_dt())
		return 0;

	if (soc_is_exynos4210()) {
		exynos_pdma0_pdata.nr_valid_peri =
			ARRAY_SIZE(exynos4210_pdma0_peri);
		exynos_pdma0_pdata.peri_id = exynos4210_pdma0_peri;
		exynos_pdma1_pdata.nr_valid_peri =
			ARRAY_SIZE(exynos4210_pdma1_peri);
		exynos_pdma1_pdata.peri_id = exynos4210_pdma1_peri;

		if (samsung_rev() == EXYNOS4210_REV_0)
			exynos_mdma1_device.res.start = EXYNOS4_PA_S_MDMA1;
	} else if (soc_is_exynos4212() || soc_is_exynos4412()) {
		exynos_pdma0_pdata.nr_valid_peri =
			ARRAY_SIZE(exynos4212_pdma0_peri);
		exynos_pdma0_pdata.peri_id = exynos4212_pdma0_peri;
		exynos_pdma1_pdata.nr_valid_peri =
			ARRAY_SIZE(exynos4212_pdma1_peri);
		exynos_pdma1_pdata.peri_id = exynos4212_pdma1_peri;
	} else if (soc_is_exynos5250()) {
		exynos_pdma0_pdata.nr_valid_peri =
			ARRAY_SIZE(exynos5250_pdma0_peri);
		exynos_pdma0_pdata.peri_id = exynos5250_pdma0_peri;
		exynos_pdma1_pdata.nr_valid_peri =
			ARRAY_SIZE(exynos5250_pdma1_peri);
		exynos_pdma1_pdata.peri_id = exynos5250_pdma1_peri;

		exynos_pdma0_device.res.start = EXYNOS5_PA_PDMA0;
		exynos_pdma0_device.res.end = EXYNOS5_PA_PDMA0 + SZ_4K;
		exynos_pdma0_device.irq[0] = EXYNOS5_IRQ_PDMA0;
		exynos_pdma1_device.res.start = EXYNOS5_PA_PDMA1;
		exynos_pdma1_device.res.end = EXYNOS5_PA_PDMA1 + SZ_4K;
		exynos_pdma0_device.irq[0] = EXYNOS5_IRQ_PDMA1;
		exynos_mdma1_device.res.start = EXYNOS5_PA_MDMA1;
		exynos_mdma1_device.res.end = EXYNOS5_PA_MDMA1 + SZ_4K;
		exynos_pdma0_device.irq[0] = EXYNOS5_IRQ_MDMA1;
	}

	dma_cap_set(DMA_SLAVE, exynos_pdma0_pdata.cap_mask);
	dma_cap_set(DMA_CYCLIC, exynos_pdma0_pdata.cap_mask);
	dma_cap_set(DMA_PRIVATE, exynos_pdma0_pdata.cap_mask);
	amba_device_register(&exynos_pdma0_device, &iomem_resource);

	dma_cap_set(DMA_SLAVE, exynos_pdma1_pdata.cap_mask);
	dma_cap_set(DMA_CYCLIC, exynos_pdma1_pdata.cap_mask);
	dma_cap_set(DMA_PRIVATE, exynos_pdma1_pdata.cap_mask);
	amba_device_register(&exynos_pdma1_device, &iomem_resource);

	dma_cap_set(DMA_MEMCPY, exynos_mdma1_pdata.cap_mask);
	amba_device_register(&exynos_mdma1_device, &iomem_resource);

	return 0;
}
arch_initcall(exynos_dma_init);