Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 1 | /* linux/arch/arm/mach-s3c2440/dma.c |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 2 | * |
Ben Dooks | c16f7bd | 2006-12-17 20:05:21 +0100 | [diff] [blame] | 3 | * Copyright (c) 2006 Simtec Electronics |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 4 | * Ben Dooks <ben@simtec.co.uk> |
| 5 | * |
| 6 | * S3C2440 DMA selection |
| 7 | * |
| 8 | * http://armlinux.simtec.co.uk/ |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 17 | #include <linux/device.h> |
Ben Dooks | b6d1f54 | 2006-12-17 23:22:26 +0100 | [diff] [blame] | 18 | #include <linux/serial_core.h> |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 19 | |
Ben Dooks | 44dc940 | 2009-03-19 15:02:35 +0000 | [diff] [blame] | 20 | #include <mach/map.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 21 | #include <mach/dma.h> |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 22 | |
Ben Dooks | 992426b | 2010-02-20 23:01:33 +0000 | [diff] [blame] | 23 | #include <plat/dma-s3c24xx.h> |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 24 | #include <plat/cpu.h> |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 25 | |
Ben Dooks | a2b7ba9 | 2008-10-07 22:26:09 +0100 | [diff] [blame] | 26 | #include <plat/regs-serial.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 27 | #include <mach/regs-gpio.h> |
Ben Dooks | 44dc940 | 2009-03-19 15:02:35 +0000 | [diff] [blame] | 28 | #include <plat/regs-dma.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 29 | #include <mach/regs-lcd.h> |
Ben Dooks | 1362270 | 2008-10-30 10:14:38 +0000 | [diff] [blame] | 30 | #include <plat/regs-spi.h> |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 31 | |
| 32 | static struct s3c24xx_dma_map __initdata s3c2440_dma_mappings[] = { |
| 33 | [DMACH_XD0] = { |
| 34 | .name = "xdreq0", |
| 35 | .channels[0] = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID, |
| 36 | }, |
| 37 | [DMACH_XD1] = { |
| 38 | .name = "xdreq1", |
| 39 | .channels[1] = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID, |
| 40 | }, |
| 41 | [DMACH_SDI] = { |
| 42 | .name = "sdi", |
| 43 | .channels[0] = S3C2410_DCON_CH0_SDI | DMA_CH_VALID, |
| 44 | .channels[1] = S3C2440_DCON_CH1_SDI | DMA_CH_VALID, |
| 45 | .channels[2] = S3C2410_DCON_CH2_SDI | DMA_CH_VALID, |
| 46 | .channels[3] = S3C2410_DCON_CH3_SDI | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 47 | }, |
| 48 | [DMACH_SPI0] = { |
| 49 | .name = "spi0", |
| 50 | .channels[1] = S3C2410_DCON_CH1_SPI | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 51 | }, |
| 52 | [DMACH_SPI1] = { |
| 53 | .name = "spi1", |
| 54 | .channels[3] = S3C2410_DCON_CH3_SPI | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 55 | }, |
| 56 | [DMACH_UART0] = { |
| 57 | .name = "uart0", |
| 58 | .channels[0] = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 59 | }, |
| 60 | [DMACH_UART1] = { |
| 61 | .name = "uart1", |
| 62 | .channels[1] = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 63 | }, |
| 64 | [DMACH_UART2] = { |
| 65 | .name = "uart2", |
| 66 | .channels[3] = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 67 | }, |
| 68 | [DMACH_TIMER] = { |
| 69 | .name = "timer", |
| 70 | .channels[0] = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID, |
| 71 | .channels[2] = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID, |
| 72 | .channels[3] = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID, |
| 73 | }, |
| 74 | [DMACH_I2S_IN] = { |
| 75 | .name = "i2s-sdi", |
| 76 | .channels[1] = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID, |
| 77 | .channels[2] = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 78 | }, |
| 79 | [DMACH_I2S_OUT] = { |
| 80 | .name = "i2s-sdo", |
| 81 | .channels[0] = S3C2440_DCON_CH0_I2SSDO | DMA_CH_VALID, |
| 82 | .channels[2] = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 83 | }, |
| 84 | [DMACH_PCM_IN] = { |
| 85 | .name = "pcm-in", |
| 86 | .channels[0] = S3C2440_DCON_CH0_PCMIN | DMA_CH_VALID, |
| 87 | .channels[2] = S3C2440_DCON_CH2_PCMIN | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 88 | }, |
| 89 | [DMACH_PCM_OUT] = { |
| 90 | .name = "pcm-out", |
| 91 | .channels[1] = S3C2440_DCON_CH1_PCMOUT | DMA_CH_VALID, |
| 92 | .channels[3] = S3C2440_DCON_CH3_PCMOUT | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 93 | }, |
| 94 | [DMACH_MIC_IN] = { |
| 95 | .name = "mic-in", |
| 96 | .channels[2] = S3C2440_DCON_CH2_MICIN | DMA_CH_VALID, |
| 97 | .channels[3] = S3C2440_DCON_CH3_MICIN | DMA_CH_VALID, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 98 | }, |
| 99 | [DMACH_USB_EP1] = { |
| 100 | .name = "usb-ep1", |
| 101 | .channels[0] = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID, |
| 102 | }, |
| 103 | [DMACH_USB_EP2] = { |
| 104 | .name = "usb-ep2", |
| 105 | .channels[1] = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID, |
| 106 | }, |
| 107 | [DMACH_USB_EP3] = { |
| 108 | .name = "usb-ep3", |
| 109 | .channels[2] = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID, |
| 110 | }, |
| 111 | [DMACH_USB_EP4] = { |
| 112 | .name = "usb-ep4", |
| 113 | .channels[3] = S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID, |
| 114 | }, |
| 115 | }; |
| 116 | |
| 117 | static void s3c2440_dma_select(struct s3c2410_dma_chan *chan, |
| 118 | struct s3c24xx_dma_map *map) |
| 119 | { |
| 120 | chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID; |
| 121 | } |
| 122 | |
| 123 | static struct s3c24xx_dma_selection __initdata s3c2440_dma_sel = { |
| 124 | .select = s3c2440_dma_select, |
| 125 | .dcon_mask = 7 << 24, |
| 126 | .map = s3c2440_dma_mappings, |
| 127 | .map_size = ARRAY_SIZE(s3c2440_dma_mappings), |
| 128 | }; |
| 129 | |
Ben Dooks | bd65c82 | 2007-02-13 13:14:12 +0100 | [diff] [blame] | 130 | static struct s3c24xx_dma_order __initdata s3c2440_dma_order = { |
| 131 | .channels = { |
| 132 | [DMACH_SDI] = { |
| 133 | .list = { |
| 134 | [0] = 3 | DMA_CH_VALID, |
| 135 | [1] = 2 | DMA_CH_VALID, |
| 136 | [2] = 1 | DMA_CH_VALID, |
| 137 | [3] = 0 | DMA_CH_VALID, |
| 138 | }, |
| 139 | }, |
| 140 | [DMACH_I2S_IN] = { |
| 141 | .list = { |
| 142 | [0] = 1 | DMA_CH_VALID, |
| 143 | [1] = 2 | DMA_CH_VALID, |
| 144 | }, |
| 145 | }, |
| 146 | [DMACH_I2S_OUT] = { |
| 147 | .list = { |
| 148 | [0] = 2 | DMA_CH_VALID, |
| 149 | [1] = 1 | DMA_CH_VALID, |
| 150 | }, |
| 151 | }, |
| 152 | [DMACH_PCM_IN] = { |
| 153 | .list = { |
| 154 | [0] = 2 | DMA_CH_VALID, |
| 155 | [1] = 1 | DMA_CH_VALID, |
| 156 | }, |
| 157 | }, |
| 158 | [DMACH_PCM_OUT] = { |
| 159 | .list = { |
| 160 | [0] = 1 | DMA_CH_VALID, |
| 161 | [1] = 3 | DMA_CH_VALID, |
| 162 | }, |
| 163 | }, |
| 164 | [DMACH_MIC_IN] = { |
| 165 | .list = { |
| 166 | [0] = 3 | DMA_CH_VALID, |
| 167 | [1] = 2 | DMA_CH_VALID, |
| 168 | }, |
| 169 | }, |
| 170 | }, |
| 171 | }; |
| 172 | |
Heiko Stuebner | 04511a6 | 2012-01-27 15:35:25 +0900 | [diff] [blame] | 173 | static int __init s3c2440_dma_add(struct device *dev, |
| 174 | struct subsys_interface *sif) |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 175 | { |
Ben Dooks | 48adbcf | 2007-02-17 15:37:14 +0100 | [diff] [blame] | 176 | s3c2410_dma_init(); |
Ben Dooks | bd65c82 | 2007-02-13 13:14:12 +0100 | [diff] [blame] | 177 | s3c24xx_dma_order_set(&s3c2440_dma_order); |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 178 | return s3c24xx_dma_init_map(&s3c2440_dma_sel); |
| 179 | } |
| 180 | |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 181 | static struct subsys_interface s3c2440_dma_interface = { |
| 182 | .name = "s3c2440_dma", |
| 183 | .subsys = &s3c2440_subsys, |
| 184 | .add_dev = s3c2440_dma_add, |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 185 | }; |
| 186 | |
| 187 | static int __init s3c2440_dma_init(void) |
| 188 | { |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 189 | return subsys_interface_register(&s3c2440_dma_interface); |
Ben Dooks | 98c418a | 2006-09-15 23:45:17 +0100 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | arch_initcall(s3c2440_dma_init); |
| 193 | |