e8b1cc3a34
Add basic DMA configuration for u5500 supporting memcpy. Make way for SDI0 dma support by setting SDI0 to -1, indicating it will be configured in runtime. Signed-off-by: Per Forlin <per.forlin@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2010
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*
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* Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson
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* Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
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* Author: Rabin Vincent <rabinv.vincent@stericsson.com> for ST-Ericsson
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*
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* License terms: GNU General Public License (GPL), version 2
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*/
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <plat/ste_dma40.h>
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#include <mach/setup.h>
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#include <mach/hardware.h>
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#include "ste-dma40-db5500.h"
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static struct resource dma40_resources[] = {
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[0] = {
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.start = U5500_DMA_BASE,
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.end = U5500_DMA_BASE + SZ_4K - 1,
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.flags = IORESOURCE_MEM,
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.name = "base",
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},
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[1] = {
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.start = U5500_DMA_LCPA_BASE,
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.end = U5500_DMA_LCPA_BASE + 2 * SZ_1K - 1,
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.flags = IORESOURCE_MEM,
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.name = "lcpa",
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},
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[2] = {
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.start = IRQ_DB5500_DMA,
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.end = IRQ_DB5500_DMA,
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.flags = IORESOURCE_IRQ
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}
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};
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/* Default configuration for physical memcpy */
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static struct stedma40_chan_cfg dma40_memcpy_conf_phy = {
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.mode = STEDMA40_MODE_PHYSICAL,
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.dir = STEDMA40_MEM_TO_MEM,
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.src_info.data_width = STEDMA40_BYTE_WIDTH,
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.src_info.psize = STEDMA40_PSIZE_PHY_1,
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.src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
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.dst_info.data_width = STEDMA40_BYTE_WIDTH,
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.dst_info.psize = STEDMA40_PSIZE_PHY_1,
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.dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
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};
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/* Default configuration for logical memcpy */
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static struct stedma40_chan_cfg dma40_memcpy_conf_log = {
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.dir = STEDMA40_MEM_TO_MEM,
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.src_info.data_width = STEDMA40_BYTE_WIDTH,
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.src_info.psize = STEDMA40_PSIZE_LOG_1,
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.src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
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.dst_info.data_width = STEDMA40_BYTE_WIDTH,
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.dst_info.psize = STEDMA40_PSIZE_LOG_1,
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.dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
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};
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/*
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* Mapping between soruce event lines and physical device address This was
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* created assuming that the event line is tied to a device and therefore the
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* address is constant, however this is not true for at least USB, and the
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* values are just placeholders for USB. This table is preserved and used for
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* now.
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*/
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static const dma_addr_t dma40_rx_map[DB5500_DMA_NR_DEV] = {
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[DB5500_DMA_DEV24_SDMMC0_RX] = -1,
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};
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/* Mapping between destination event lines and physical device address */
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static const dma_addr_t dma40_tx_map[DB5500_DMA_NR_DEV] = {
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[DB5500_DMA_DEV24_SDMMC0_TX] = -1,
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};
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static int dma40_memcpy_event[] = {
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DB5500_DMA_MEMCPY_TX_1,
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DB5500_DMA_MEMCPY_TX_2,
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DB5500_DMA_MEMCPY_TX_3,
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DB5500_DMA_MEMCPY_TX_4,
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DB5500_DMA_MEMCPY_TX_5,
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};
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static struct stedma40_platform_data dma40_plat_data = {
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.dev_len = ARRAY_SIZE(dma40_rx_map),
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.dev_rx = dma40_rx_map,
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.dev_tx = dma40_tx_map,
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.memcpy = dma40_memcpy_event,
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.memcpy_len = ARRAY_SIZE(dma40_memcpy_event),
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.memcpy_conf_phy = &dma40_memcpy_conf_phy,
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.memcpy_conf_log = &dma40_memcpy_conf_log,
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.disabled_channels = {-1},
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};
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static struct platform_device dma40_device = {
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.dev = {
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.platform_data = &dma40_plat_data,
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},
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.name = "dma40",
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.id = 0,
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.num_resources = ARRAY_SIZE(dma40_resources),
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.resource = dma40_resources
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};
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void __init db5500_dma_init(void)
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{
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int ret;
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ret = platform_device_register(&dma40_device);
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if (ret)
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dev_err(&dma40_device.dev, "unable to register device: %d\n", ret);
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}
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