Ben Dooks | a21765a | 2007-02-11 18:31:01 +0100 | [diff] [blame] | 1 | /* linux/arch/arm/mach-s3c2412/dma.c |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 2 | * |
Ben Dooks | c16f7bd | 2006-12-17 20:05:21 +0100 | [diff] [blame] | 3 | * Copyright (c) 2006 Simtec Electronics |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 4 | * Ben Dooks <ben@simtec.co.uk> |
| 5 | * |
| 6 | * S3C2412 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> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 19 | #include <linux/io.h> |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 20 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 21 | #include <mach/dma.h> |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +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 | 3434801 | 2006-09-18 23:52:03 +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 | f74c95c | 2008-10-30 10:14:36 +0000 | [diff] [blame] | 28 | #include <plat/regs-ac97.h> |
Ben Dooks | 44dc940 | 2009-03-19 15:02:35 +0000 | [diff] [blame] | 29 | #include <plat/regs-dma.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 30 | #include <mach/regs-mem.h> |
| 31 | #include <mach/regs-lcd.h> |
| 32 | #include <mach/regs-sdi.h> |
Ben Dooks | 8150bc8 | 2009-03-04 00:49:26 +0000 | [diff] [blame] | 33 | #include <plat/regs-iis.h> |
Ben Dooks | 1362270 | 2008-10-30 10:14:38 +0000 | [diff] [blame] | 34 | #include <plat/regs-spi.h> |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 35 | |
| 36 | #define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID } |
| 37 | |
| 38 | static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = { |
| 39 | [DMACH_XD0] = { |
| 40 | .name = "xdreq0", |
| 41 | .channels = MAP(S3C2412_DMAREQSEL_XDREQ0), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 42 | .channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ0), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 43 | }, |
| 44 | [DMACH_XD1] = { |
| 45 | .name = "xdreq1", |
| 46 | .channels = MAP(S3C2412_DMAREQSEL_XDREQ1), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 47 | .channels_rx = MAP(S3C2412_DMAREQSEL_XDREQ1), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 48 | }, |
| 49 | [DMACH_SDI] = { |
| 50 | .name = "sdi", |
| 51 | .channels = MAP(S3C2412_DMAREQSEL_SDI), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 52 | .channels_rx = MAP(S3C2412_DMAREQSEL_SDI), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 53 | }, |
| 54 | [DMACH_SPI0] = { |
| 55 | .name = "spi0", |
| 56 | .channels = MAP(S3C2412_DMAREQSEL_SPI0TX), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 57 | .channels_rx = MAP(S3C2412_DMAREQSEL_SPI0RX), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 58 | }, |
| 59 | [DMACH_SPI1] = { |
| 60 | .name = "spi1", |
| 61 | .channels = MAP(S3C2412_DMAREQSEL_SPI1TX), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 62 | .channels_rx = MAP(S3C2412_DMAREQSEL_SPI1RX), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 63 | }, |
| 64 | [DMACH_UART0] = { |
| 65 | .name = "uart0", |
| 66 | .channels = MAP(S3C2412_DMAREQSEL_UART0_0), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 67 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART0_0), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 68 | }, |
| 69 | [DMACH_UART1] = { |
| 70 | .name = "uart1", |
| 71 | .channels = MAP(S3C2412_DMAREQSEL_UART1_0), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 72 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART1_0), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 73 | }, |
| 74 | [DMACH_UART2] = { |
| 75 | .name = "uart2", |
| 76 | .channels = MAP(S3C2412_DMAREQSEL_UART2_0), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 77 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART2_0), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 78 | }, |
| 79 | [DMACH_UART0_SRC2] = { |
| 80 | .name = "uart0", |
| 81 | .channels = MAP(S3C2412_DMAREQSEL_UART0_1), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 82 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART0_1), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 83 | }, |
| 84 | [DMACH_UART1_SRC2] = { |
| 85 | .name = "uart1", |
| 86 | .channels = MAP(S3C2412_DMAREQSEL_UART1_1), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 87 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART1_1), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 88 | }, |
| 89 | [DMACH_UART2_SRC2] = { |
| 90 | .name = "uart2", |
| 91 | .channels = MAP(S3C2412_DMAREQSEL_UART2_1), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 92 | .channels_rx = MAP(S3C2412_DMAREQSEL_UART2_1), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 93 | }, |
| 94 | [DMACH_TIMER] = { |
| 95 | .name = "timer", |
| 96 | .channels = MAP(S3C2412_DMAREQSEL_TIMER), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 97 | .channels_rx = MAP(S3C2412_DMAREQSEL_TIMER), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 98 | }, |
| 99 | [DMACH_I2S_IN] = { |
| 100 | .name = "i2s-sdi", |
| 101 | .channels = MAP(S3C2412_DMAREQSEL_I2SRX), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 102 | .channels_rx = MAP(S3C2412_DMAREQSEL_I2SRX), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 103 | }, |
| 104 | [DMACH_I2S_OUT] = { |
| 105 | .name = "i2s-sdo", |
| 106 | .channels = MAP(S3C2412_DMAREQSEL_I2STX), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 107 | .channels_rx = MAP(S3C2412_DMAREQSEL_I2STX), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 108 | }, |
| 109 | [DMACH_USB_EP1] = { |
| 110 | .name = "usb-ep1", |
| 111 | .channels = MAP(S3C2412_DMAREQSEL_USBEP1), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 112 | .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP1), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 113 | }, |
| 114 | [DMACH_USB_EP2] = { |
| 115 | .name = "usb-ep2", |
| 116 | .channels = MAP(S3C2412_DMAREQSEL_USBEP2), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 117 | .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP2), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 118 | }, |
| 119 | [DMACH_USB_EP3] = { |
| 120 | .name = "usb-ep3", |
| 121 | .channels = MAP(S3C2412_DMAREQSEL_USBEP3), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 122 | .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP3), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 123 | }, |
| 124 | [DMACH_USB_EP4] = { |
| 125 | .name = "usb-ep4", |
| 126 | .channels = MAP(S3C2412_DMAREQSEL_USBEP4), |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 127 | .channels_rx = MAP(S3C2412_DMAREQSEL_USBEP4), |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 128 | }, |
| 129 | }; |
| 130 | |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 131 | static void s3c2412_dma_direction(struct s3c2410_dma_chan *chan, |
| 132 | struct s3c24xx_dma_map *map, |
Boojin Kim | 51ddf31 | 2011-09-02 09:44:44 +0900 | [diff] [blame] | 133 | enum dma_data_direction dir) |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 134 | { |
| 135 | unsigned long chsel; |
| 136 | |
Boojin Kim | 51ddf31 | 2011-09-02 09:44:44 +0900 | [diff] [blame] | 137 | if (dir == DMA_FROM_DEVICE) |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 138 | chsel = map->channels_rx[0]; |
| 139 | else |
| 140 | chsel = map->channels[0]; |
| 141 | |
| 142 | chsel &= ~DMA_CH_VALID; |
| 143 | chsel |= S3C2412_DMAREQSEL_HW; |
| 144 | |
| 145 | writel(chsel, chan->regs + S3C2412_DMA_DMAREQSEL); |
| 146 | } |
| 147 | |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 148 | static void s3c2412_dma_select(struct s3c2410_dma_chan *chan, |
| 149 | struct s3c24xx_dma_map *map) |
| 150 | { |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 151 | s3c2412_dma_direction(chan, map, chan->source); |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 152 | } |
| 153 | |
| 154 | static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = { |
| 155 | .select = s3c2412_dma_select, |
Ben Dooks | c6709e8 | 2008-01-28 13:01:20 +0100 | [diff] [blame] | 156 | .direction = s3c2412_dma_direction, |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 157 | .dcon_mask = 0, |
| 158 | .map = s3c2412_dma_mappings, |
| 159 | .map_size = ARRAY_SIZE(s3c2412_dma_mappings), |
| 160 | }; |
| 161 | |
Heiko Stuebner | 04511a6 | 2012-01-27 15:35:25 +0900 | [diff] [blame] | 162 | static int __init s3c2412_dma_add(struct device *dev, |
| 163 | struct subsys_interface *sif) |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 164 | { |
Ben Dooks | 48adbcf | 2007-02-17 15:37:14 +0100 | [diff] [blame] | 165 | s3c2410_dma_init(); |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 166 | return s3c24xx_dma_init_map(&s3c2412_dma_sel); |
| 167 | } |
| 168 | |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 169 | static struct subsys_interface s3c2412_dma_interface = { |
| 170 | .name = "s3c2412_dma", |
| 171 | .subsys = &s3c2412_subsys, |
| 172 | .add_dev = s3c2412_dma_add, |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 173 | }; |
| 174 | |
| 175 | static int __init s3c2412_dma_init(void) |
| 176 | { |
Kay Sievers | 4a858cf | 2011-12-21 16:01:38 -0800 | [diff] [blame] | 177 | return subsys_interface_register(&s3c2412_dma_interface); |
Ben Dooks | 3434801 | 2006-09-18 23:52:03 +0100 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | arch_initcall(s3c2412_dma_init); |