| /* linux/arch/arm/mach-s3c2443/dma.c |
| * |
| * Copyright (c) 2007 Simtec Electronics |
| * Ben Dooks <ben@simtec.co.uk> |
| * |
| * S3C2443 DMA selection |
| * |
| * http://armlinux.simtec.co.uk/ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/device.h> |
| #include <linux/serial_core.h> |
| #include <linux/serial_s3c.h> |
| #include <linux/io.h> |
| |
| #include <mach/dma.h> |
| |
| #include <plat/dma-s3c24xx.h> |
| #include <plat/cpu.h> |
| |
| #include <mach/regs-gpio.h> |
| #include <plat/regs-dma.h> |
| #include <mach/regs-lcd.h> |
| #include <plat/regs-spi.h> |
| |
| #define MAP(x) { \ |
| [0] = (x) | DMA_CH_VALID, \ |
| [1] = (x) | DMA_CH_VALID, \ |
| [2] = (x) | DMA_CH_VALID, \ |
| [3] = (x) | DMA_CH_VALID, \ |
| [4] = (x) | DMA_CH_VALID, \ |
| [5] = (x) | DMA_CH_VALID, \ |
| } |
| |
| static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = { |
| [DMACH_XD0] = { |
| .name = "xdreq0", |
| .channels = MAP(S3C2443_DMAREQSEL_XDREQ0), |
| }, |
| [DMACH_XD1] = { |
| .name = "xdreq1", |
| .channels = MAP(S3C2443_DMAREQSEL_XDREQ1), |
| }, |
| [DMACH_SDI] = { /* only on S3C2443 */ |
| .name = "sdi", |
| .channels = MAP(S3C2443_DMAREQSEL_SDI), |
| }, |
| [DMACH_SPI0_RX] = { |
| .name = "spi0-rx", |
| .channels = MAP(S3C2443_DMAREQSEL_SPI0RX), |
| }, |
| [DMACH_SPI0_TX] = { |
| .name = "spi0-tx", |
| .channels = MAP(S3C2443_DMAREQSEL_SPI0TX), |
| }, |
| [DMACH_SPI1_RX] = { /* only on S3C2443/S3C2450 */ |
| .name = "spi1-rx", |
| .channels = MAP(S3C2443_DMAREQSEL_SPI1RX), |
| }, |
| [DMACH_SPI1_TX] = { /* only on S3C2443/S3C2450 */ |
| .name = "spi1-tx", |
| .channels = MAP(S3C2443_DMAREQSEL_SPI1TX), |
| }, |
| [DMACH_UART0] = { |
| .name = "uart0", |
| .channels = MAP(S3C2443_DMAREQSEL_UART0_0), |
| }, |
| [DMACH_UART1] = { |
| .name = "uart1", |
| .channels = MAP(S3C2443_DMAREQSEL_UART1_0), |
| }, |
| [DMACH_UART2] = { |
| .name = "uart2", |
| .channels = MAP(S3C2443_DMAREQSEL_UART2_0), |
| }, |
| [DMACH_UART3] = { |
| .name = "uart3", |
| .channels = MAP(S3C2443_DMAREQSEL_UART3_0), |
| }, |
| [DMACH_UART0_SRC2] = { |
| .name = "uart0", |
| .channels = MAP(S3C2443_DMAREQSEL_UART0_1), |
| }, |
| [DMACH_UART1_SRC2] = { |
| .name = "uart1", |
| .channels = MAP(S3C2443_DMAREQSEL_UART1_1), |
| }, |
| [DMACH_UART2_SRC2] = { |
| .name = "uart2", |
| .channels = MAP(S3C2443_DMAREQSEL_UART2_1), |
| }, |
| [DMACH_UART3_SRC2] = { |
| .name = "uart3", |
| .channels = MAP(S3C2443_DMAREQSEL_UART3_1), |
| }, |
| [DMACH_TIMER] = { |
| .name = "timer", |
| .channels = MAP(S3C2443_DMAREQSEL_TIMER), |
| }, |
| [DMACH_I2S_IN] = { |
| .name = "i2s-sdi", |
| .channels = MAP(S3C2443_DMAREQSEL_I2SRX), |
| }, |
| [DMACH_I2S_OUT] = { |
| .name = "i2s-sdo", |
| .channels = MAP(S3C2443_DMAREQSEL_I2STX), |
| }, |
| [DMACH_PCM_IN] = { |
| .name = "pcm-in", |
| .channels = MAP(S3C2443_DMAREQSEL_PCMIN), |
| }, |
| [DMACH_PCM_OUT] = { |
| .name = "pcm-out", |
| .channels = MAP(S3C2443_DMAREQSEL_PCMOUT), |
| }, |
| [DMACH_MIC_IN] = { |
| .name = "mic-in", |
| .channels = MAP(S3C2443_DMAREQSEL_MICIN), |
| }, |
| }; |
| |
| static void s3c2443_dma_select(struct s3c2410_dma_chan *chan, |
| struct s3c24xx_dma_map *map) |
| { |
| unsigned long chsel = map->channels[0] & (~DMA_CH_VALID); |
| writel(chsel | S3C2443_DMAREQSEL_HW, |
| chan->regs + S3C2443_DMA_DMAREQSEL); |
| } |
| |
| static struct s3c24xx_dma_selection __initdata s3c2443_dma_sel = { |
| .select = s3c2443_dma_select, |
| .dcon_mask = 0, |
| .map = s3c2443_dma_mappings, |
| .map_size = ARRAY_SIZE(s3c2443_dma_mappings), |
| }; |
| |
| static int __init s3c2443_dma_add(struct device *dev, |
| struct subsys_interface *sif) |
| { |
| s3c24xx_dma_init(6, IRQ_S3C2443_DMA0, 0x100); |
| return s3c24xx_dma_init_map(&s3c2443_dma_sel); |
| } |
| |
| #ifdef CONFIG_CPU_S3C2416 |
| /* S3C2416 DMA contains the same selection table as the S3C2443 */ |
| static struct subsys_interface s3c2416_dma_interface = { |
| .name = "s3c2416_dma", |
| .subsys = &s3c2416_subsys, |
| .add_dev = s3c2443_dma_add, |
| }; |
| |
| static int __init s3c2416_dma_init(void) |
| { |
| return subsys_interface_register(&s3c2416_dma_interface); |
| } |
| |
| arch_initcall(s3c2416_dma_init); |
| #endif |
| |
| #ifdef CONFIG_CPU_S3C2443 |
| static struct subsys_interface s3c2443_dma_interface = { |
| .name = "s3c2443_dma", |
| .subsys = &s3c2443_subsys, |
| .add_dev = s3c2443_dma_add, |
| }; |
| |
| static int __init s3c2443_dma_init(void) |
| { |
| return subsys_interface_register(&s3c2443_dma_interface); |
| } |
| |
| arch_initcall(s3c2443_dma_init); |
| #endif |