ux500: Add DMA support for U5500
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>
diff --git a/arch/arm/mach-ux500/dma-db5500.c b/arch/arm/mach-ux500/dma-db5500.c
new file mode 100644
index 0000000..32a061f
--- /dev/null
+++ b/arch/arm/mach-ux500/dma-db5500.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * Author: Per Forlin <per.forlin@stericsson.com> for ST-Ericsson
+ * Author: Jonas Aaberg <jonas.aberg@stericsson.com> for ST-Ericsson
+ * Author: Rabin Vincent <rabinv.vincent@stericsson.com> for ST-Ericsson
+ *
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+#include <plat/ste_dma40.h>
+#include <mach/setup.h>
+#include <mach/hardware.h>
+
+#include "ste-dma40-db5500.h"
+
+static struct resource dma40_resources[] = {
+ [0] = {
+ .start = U5500_DMA_BASE,
+ .end = U5500_DMA_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ .name = "base",
+ },
+ [1] = {
+ .start = U5500_DMA_LCPA_BASE,
+ .end = U5500_DMA_LCPA_BASE + 2 * SZ_1K - 1,
+ .flags = IORESOURCE_MEM,
+ .name = "lcpa",
+ },
+ [2] = {
+ .start = IRQ_DB5500_DMA,
+ .end = IRQ_DB5500_DMA,
+ .flags = IORESOURCE_IRQ
+ }
+};
+
+/* Default configuration for physical memcpy */
+static struct stedma40_chan_cfg dma40_memcpy_conf_phy = {
+ .mode = STEDMA40_MODE_PHYSICAL,
+ .dir = STEDMA40_MEM_TO_MEM,
+
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .src_info.psize = STEDMA40_PSIZE_PHY_1,
+ .src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
+
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.psize = STEDMA40_PSIZE_PHY_1,
+ .dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
+};
+
+/* Default configuration for logical memcpy */
+static struct stedma40_chan_cfg dma40_memcpy_conf_log = {
+ .dir = STEDMA40_MEM_TO_MEM,
+
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .src_info.psize = STEDMA40_PSIZE_LOG_1,
+ .src_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
+
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.psize = STEDMA40_PSIZE_LOG_1,
+ .dst_info.flow_ctrl = STEDMA40_NO_FLOW_CTRL,
+};
+
+/*
+ * Mapping between soruce event lines and physical device address This was
+ * created assuming that the event line is tied to a device and therefore the
+ * address is constant, however this is not true for at least USB, and the
+ * values are just placeholders for USB. This table is preserved and used for
+ * now.
+ */
+static const dma_addr_t dma40_rx_map[DB5500_DMA_NR_DEV] = {
+ [DB5500_DMA_DEV24_SDMMC0_RX] = -1,
+};
+
+/* Mapping between destination event lines and physical device address */
+static const dma_addr_t dma40_tx_map[DB5500_DMA_NR_DEV] = {
+ [DB5500_DMA_DEV24_SDMMC0_TX] = -1,
+};
+
+static int dma40_memcpy_event[] = {
+ DB5500_DMA_MEMCPY_TX_1,
+ DB5500_DMA_MEMCPY_TX_2,
+ DB5500_DMA_MEMCPY_TX_3,
+ DB5500_DMA_MEMCPY_TX_4,
+ DB5500_DMA_MEMCPY_TX_5,
+};
+
+static struct stedma40_platform_data dma40_plat_data = {
+ .dev_len = ARRAY_SIZE(dma40_rx_map),
+ .dev_rx = dma40_rx_map,
+ .dev_tx = dma40_tx_map,
+ .memcpy = dma40_memcpy_event,
+ .memcpy_len = ARRAY_SIZE(dma40_memcpy_event),
+ .memcpy_conf_phy = &dma40_memcpy_conf_phy,
+ .memcpy_conf_log = &dma40_memcpy_conf_log,
+ .disabled_channels = {-1},
+};
+
+static struct platform_device dma40_device = {
+ .dev = {
+ .platform_data = &dma40_plat_data,
+ },
+ .name = "dma40",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(dma40_resources),
+ .resource = dma40_resources
+};
+
+void __init db5500_dma_init(void)
+{
+ int ret;
+
+ ret = platform_device_register(&dma40_device);
+ if (ret)
+ dev_err(&dma40_device.dev, "unable to register device: %d\n", ret);
+
+}