2 * Samsung's S3C64XX generic DMA support using amba-pl08x driver.
4 * Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/kernel.h>
12 #include <linux/amba/bus.h>
13 #include <linux/amba/pl080.h>
14 #include <linux/amba/pl08x.h>
17 #include <mach/irqs.h>
22 static int pl08x_get_xfer_signal(const struct pl08x_channel_data *cd)
24 return cd->min_signal;
27 static void pl08x_put_xfer_signal(const struct pl08x_channel_data *cd, int ch)
35 static struct pl08x_channel_data s3c64xx_dma0_info[] = {
40 .periph_buses = PL08X_AHB2,
45 .periph_buses = PL08X_AHB2,
50 .periph_buses = PL08X_AHB2,
55 .periph_buses = PL08X_AHB2,
60 .periph_buses = PL08X_AHB2,
65 .periph_buses = PL08X_AHB2,
70 .periph_buses = PL08X_AHB2,
75 .periph_buses = PL08X_AHB2,
80 .periph_buses = PL08X_AHB2,
85 .periph_buses = PL08X_AHB2,
90 .periph_buses = PL08X_AHB2,
95 .periph_buses = PL08X_AHB2,
100 .periph_buses = PL08X_AHB2,
105 .periph_buses = PL08X_AHB2,
110 .periph_buses = PL08X_AHB2,
115 .periph_buses = PL08X_AHB2,
119 struct pl08x_platform_data s3c64xx_dma0_plat_data = {
123 (PL080_BSIZE_4 << PL080_CONTROL_SB_SIZE_SHIFT |
124 PL080_BSIZE_4 << PL080_CONTROL_DB_SIZE_SHIFT |
125 PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT |
126 PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT |
127 PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE |
128 PL080_CONTROL_PROT_SYS),
130 .lli_buses = PL08X_AHB1,
131 .mem_buses = PL08X_AHB1,
132 .get_xfer_signal = pl08x_get_xfer_signal,
133 .put_xfer_signal = pl08x_put_xfer_signal,
134 .slave_channels = s3c64xx_dma0_info,
135 .num_slave_channels = ARRAY_SIZE(s3c64xx_dma0_info),
138 static AMBA_AHB_DEVICE(s3c64xx_dma0, "dma-pl080s.0", 0,
139 0x75000000, {IRQ_DMA0}, &s3c64xx_dma0_plat_data);
145 static struct pl08x_channel_data s3c64xx_dma1_info[] = {
150 .periph_buses = PL08X_AHB2,
155 .periph_buses = PL08X_AHB2,
160 .periph_buses = PL08X_AHB2,
165 .periph_buses = PL08X_AHB2,
170 .periph_buses = PL08X_AHB2,
175 .periph_buses = PL08X_AHB2,
177 .bus_id = "ac97_out",
180 .periph_buses = PL08X_AHB2,
185 .periph_buses = PL08X_AHB2,
187 .bus_id = "ac97_mic",
190 .periph_buses = PL08X_AHB2,
195 .periph_buses = PL08X_AHB2,
200 .periph_buses = PL08X_AHB2,
202 .bus_id = "external",
205 .periph_buses = PL08X_AHB2,
209 struct pl08x_platform_data s3c64xx_dma1_plat_data = {
213 (PL080_BSIZE_4 << PL080_CONTROL_SB_SIZE_SHIFT |
214 PL080_BSIZE_4 << PL080_CONTROL_DB_SIZE_SHIFT |
215 PL080_WIDTH_32BIT << PL080_CONTROL_SWIDTH_SHIFT |
216 PL080_WIDTH_32BIT << PL080_CONTROL_DWIDTH_SHIFT |
217 PL080_CONTROL_PROT_BUFF | PL080_CONTROL_PROT_CACHE |
218 PL080_CONTROL_PROT_SYS),
220 .lli_buses = PL08X_AHB1,
221 .mem_buses = PL08X_AHB1,
222 .get_xfer_signal = pl08x_get_xfer_signal,
223 .put_xfer_signal = pl08x_put_xfer_signal,
224 .slave_channels = s3c64xx_dma1_info,
225 .num_slave_channels = ARRAY_SIZE(s3c64xx_dma1_info),
228 static AMBA_AHB_DEVICE(s3c64xx_dma1, "dma-pl080s.1", 0,
229 0x75100000, {IRQ_DMA1}, &s3c64xx_dma1_plat_data);
231 static int __init s3c64xx_pl080_init(void)
233 /* Set all DMA configuration to be DMA, not SDMA */
234 writel(0xffffff, S3C64XX_SDMA_SEL);
236 if (of_have_populated_dt())
239 amba_device_register(&s3c64xx_dma0_device, &iomem_resource);
240 amba_device_register(&s3c64xx_dma1_device, &iomem_resource);
244 arch_initcall(s3c64xx_pl080_init);