Prepare omap2+ dma driver to use hwmod infrastructure
so that DMA driver can register as platform device.
Signed-off-by: G, Manjunath Kondaiah <manjugk@xxxxxx>
Cc: Benoit Cousson <b-cousson@xxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
---
arch/arm/mach-omap2/dma.c | 86 ++++++++++++++++++++++++++++++++
arch/arm/mach-omap2/include/mach/dma.h | 32 ++++++++++++
2 files changed, 118 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap2/dma.c
create mode 100644 arch/arm/mach-omap2/include/mach/dma.h
diff --git a/arch/arm/mach-omap2/dma.c b/arch/arm/mach-omap2/dma.c
new file mode 100644
index 0000000..30b20cd
--- /dev/null
+++ b/arch/arm/mach-omap2/dma.c
@@ -0,0 +1,86 @@
+/*
+ * dma.c - OMAP2 specific DMA code
+ *
+ * Copyright (C) 2003 - 2008 Nokia Corporation
+ * Author: Juha Yrjölä <juha.yrjola@xxxxxxxxx>
+ * DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@xxxxxxxxx>
+ * Graphics DMA and LCD DMA graphics tranformations
+ * by Imre Deak <imre.deak@xxxxxxxxx>
+ * 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) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@xxxxxx>
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Converted DMA library into platform driver
+ * - G, Manjunath Kondaiah <manjugk@xxxxxx>
+ *
+ * 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/irqs.h>
+#include <plat/omap_hwmod.h>
+#include <plat/omap_device.h>
+#include <plat/dma.h>
+
+static struct omap_device_pm_latency omap2_dma_latency[] = {
+ {
+ .deactivate_func = omap_device_idle_hwmods,
+ .activate_func = omap_device_enable_hwmods,
+ .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
+ },
+};
+
+/* One time initializations */
+static int __init omap2_system_dma_init_dev(struct omap_hwmod *oh, void *unused)
+{
+ struct omap_device *od;
+ struct omap_system_dma_plat_info *p;
+ char *name = "omap_system_dma";
+
+ p = kzalloc(sizeof(struct omap_system_dma_plat_info), GFP_KERNEL);
+ if (!p) {
+ pr_err("%s: Unable to allocate pdata for %s:%s\n",
+ __func__, name, oh->name);
+ return -ENOMEM;
+ }
+ od = omap_device_build(name, 0, oh, p, sizeof(*p),
+ omap2_dma_latency, ARRAY_SIZE(omap2_dma_latency), 0);
+
+ if (IS_ERR(od)) {
+ pr_err("%s: Cant build omap_device for %s:%s.\n",
+ __func__, name, oh->name);
+ kfree(p);
+ return IS_ERR(od);
+ }
+ kfree(p);
+
+ return 0;
+}
+
+static int __init omap2_system_dma_init(void)
+{
+ int ret;
+
+ ret = omap_hwmod_for_each_by_class("dma",
+ omap2_system_dma_init_dev, NULL);
+
+ return ret;
+}
+arch_initcall(omap2_system_dma_init);
diff --git a/arch/arm/mach-omap2/include/mach/dma.h b/arch/arm/mach-omap2/include/mach/dma.h
new file mode 100644
index 0000000..d0a7d5b
--- /dev/null
+++ b/arch/arm/mach-omap2/include/mach/dma.h
@@ -0,0 +1,32 @@
+/*
+ * OMAP DMA controller register offsets.
+ *
+ * Copyright (C) 2003 Nokia Corporation
+ * Author: Juha Yrjölä <juha.yrjola@xxxxxxxxx>
+ *
+ * Copyright (C) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@xxxxxx>
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Converted DMA library into platform driver
+ * - G, Manjunath Kondaiah <manjugk@xxxxxx>
+ *
+ * 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_OMAP2_DMA_H
+#define __ASM_ARCH_OMAP2_DMA_H
+
+#endif /* __ASM_ARCH_OMAP2_DMA_H */
--
1.7.1
--
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