[PATCH v3 08/13] OMAP1: DMA: Introduce DMA driver as platform device
G, Manjunath Kondaiah
manjugk at ti.com
Tue Oct 26 09:25:08 EDT 2010
Register OMAP1 DMA driver as platform device and add support
for registering through platform device layer using resource
structures.
Signed-off-by: G, Manjunath Kondaiah <manjugk at ti.com>
Cc: Benoit Cousson <b-cousson at ti.com>
Cc: Kevin Hilman <khilman at deeprootsystems.com>
Cc: Santosh Shilimkar <santosh.shilimkar at ti.com>
---
arch/arm/mach-omap1/dma.c | 182 ++++++++++++++++++++++++++++++++
arch/arm/mach-omap1/include/mach/dma.h | 29 +++++
2 files changed, 211 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap1/dma.c
create mode 100644 arch/arm/mach-omap1/include/mach/dma.h
diff --git a/arch/arm/mach-omap1/dma.c b/arch/arm/mach-omap1/dma.c
new file mode 100644
index 0000000..e756069
--- /dev/null
+++ b/arch/arm/mach-omap1/dma.c
@@ -0,0 +1,182 @@
+/*
+ * dma.c - OMAP1/OMAP7xx-specific DMA code
+ *
+ * Copyright (C) 2003 - 2008 Nokia Corporation
+ * Author: Juha Yrjölä <juha.yrjola at nokia.com>
+ * DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz at nokia.com>
+ * Graphics DMA and LCD DMA graphics tranformations
+ * by Imre Deak <imre.deak at nokia.com>
+ * OMAP2/3 support Copyright (C) 2004-2007 Texas Instruments, Inc.
+ * Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Converted DMA library into platform driver
+ * - G, Manjunath Kondaiah <manjugk at ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/device.h>
+
+#include <plat/dma.h>
+#include <plat/tc.h>
+
+#define OMAP1_DMA_BASE (0xfffed800)
+
+static struct resource res[] __initdata = {
+ [0] = {
+ .start = OMAP1_DMA_BASE,
+ .end = OMAP1_DMA_BASE + SZ_2K - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .name = "0",
+ .start = INT_DMA_CH0_6,
+ .flags = IORESOURCE_IRQ,
+ },
+ [2] = {
+ .name = "1",
+ .start = INT_DMA_CH1_7,
+ .flags = IORESOURCE_IRQ,
+ },
+ [3] = {
+ .name = "2",
+ .start = INT_DMA_CH2_8,
+ .flags = IORESOURCE_IRQ,
+ },
+ [4] = {
+ .name = "3",
+ .start = INT_DMA_CH3,
+ .flags = IORESOURCE_IRQ,
+ },
+ [5] = {
+ .name = "4",
+ .start = INT_DMA_CH4,
+ .flags = IORESOURCE_IRQ,
+ },
+ [6] = {
+ .name = "5",
+ .start = INT_DMA_CH5,
+ .flags = IORESOURCE_IRQ,
+ },
+ [7] = {
+ .name = "6",
+ .start = INT_DMA_LCD,
+ .flags = IORESOURCE_IRQ,
+ },
+ /* irq's for omap16xx and omap7xx */
+ [8] = {
+ .name = "7",
+ .start = 53 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+ [9] = {
+ .name = "8",
+ .start = 54 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+ [10] = {
+ .name = "9",
+ .start = 55 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+ [11] = {
+ .name = "10",
+ .start = 56 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+ [12] = {
+ .name = "11",
+ .start = 57 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+ [13] = {
+ .name = "12",
+ .start = 58 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+ [14] = {
+ .name = "13",
+ .start = 59 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+ [15] = {
+ .name = "14",
+ .start = 60 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+ [16] = {
+ .name = "15",
+ .start = 61 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+ [17] = {
+ .name = "16",
+ .start = 62 + IH2_BASE,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static int __init omap1_system_dma_init(void)
+{
+ struct omap_system_dma_plat_info *p;
+ struct platform_device *pdev;
+ int ret;
+
+ pdev = platform_device_alloc("omap_dma_system", 0);
+ if (!pdev) {
+ pr_err("%s: Unable to device alloc for dma\n",
+ __func__);
+ return -ENOMEM;
+ }
+
+ ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
+ if (ret) {
+ pr_err("%s: Unable to add resources for %s%d\n",
+ __func__, pdev->name, pdev->id);
+ goto exit_device_del;
+ }
+
+ p = kzalloc(sizeof(struct omap_system_dma_plat_info), GFP_KERNEL);
+ if (!p) {
+ dev_err(&pdev->dev, "%s: Unable to allocate 'p' for %s\n",
+ __func__, pdev->name);
+ ret = -ENOMEM;
+ goto exit_device_put;
+ }
+
+ ret = platform_device_add_data(pdev, p, sizeof(*p));
+ if (ret) {
+ dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
+ __func__, pdev->name, pdev->id);
+ goto exit_device_put;
+ }
+ ret = platform_device_add(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
+ __func__, pdev->name, pdev->id);
+ goto exit_device_put;
+ }
+ return ret;
+
+exit_device_put:
+ platform_device_put(pdev);
+exit_device_del:
+ platform_device_del(pdev);
+
+ return ret;
+}
+arch_initcall(omap1_system_dma_init);
diff --git a/arch/arm/mach-omap1/include/mach/dma.h b/arch/arm/mach-omap1/include/mach/dma.h
new file mode 100644
index 0000000..7949e3f
--- /dev/null
+++ b/arch/arm/mach-omap1/include/mach/dma.h
@@ -0,0 +1,29 @@
+/*
+ * OMAP DMA controller register offsets.
+ *
+ * Copyright (C) 2003 Nokia Corporation
+ * Author: Juha Yrjölä <juha.yrjola at nokia.com>
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Converted DMA library into platform driver
+ * by G, Manjunath Kondaiah <manjugk at ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef __ASM_ARCH_OMAP1_DMA_H
+#define __ASM_ARCH_OMAP1_DMA_H
+
+#endif /* __ASM_ARCH_OMAP1_DMA_H */
--
1.7.1
More information about the linux-arm-kernel
mailing list