This patch introduces OMAP1 DMA driver as platform device
and adds support for registering through platform device
layer.
Signed-off-by: Manjunatha GK <manjugk@xxxxxx>
Cc: Benoit Cousson <b-cousson@xxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx>
Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
---
arch/arm/mach-omap1/dma.c | 234 ++++++++++++++++++++++++++++++++
arch/arm/mach-omap1/include/mach/dma.h | 80 +++++++++++
2 files changed, 314 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..26ab6e3
--- /dev/null
+++ b/arch/arm/mach-omap1/dma.c
@@ -0,0 +1,234 @@
+/*
+ * dma.c - OMAP1/OMAP7xx-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) 2010 Texas Instruments, Inc.
+ * Converted DMA library into platform driver by Manjunatha GK <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/dma.h>
+#include <plat/tc.h>
+
+#define dma_read(reg) \
+({ \
+ u32 __val; \
+ __val = __raw_readw(dma_base + OMAP1_DMA_##reg); \
+ __val; \
+})
+
+#define dma_write(val, reg) \
+({ \
+ __raw_writew((val), dma_base + OMAP1_DMA_##reg); \
+})
+
+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 void __iomem *dma_base;
+
+static int __init omap1_system_dma_init(void)
+{
+ struct platform_device *pdev;
+ struct omap_system_dma_plat_info *pdata;
+ struct omap_dma_dev_attr *d;
+ int ret;
+
+ pdev = platform_device_alloc("system_dma", 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_put;
+ }
+
+ pdata = kzalloc(sizeof(struct omap_system_dma_plat_info), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(&pdev->dev, "%s: Unable to allocate pdata for %s\n",
+ __func__, pdev->name);
+ ret = -ENOMEM;
+ goto exit_device_put;
+ }
+
+ d = pdata->dma_attr;
+
+ /* Valid attributes for omap1 plus processors */
+ d->dev_caps = 0;
+
+ if (cpu_is_omap15xx())
+ d->dev_caps = ENABLE_1510_MODE;
+
+ d->dev_caps |= SRC_PORT;
+ d->dev_caps |= DST_PORT;
+ d->dev_caps |= SRC_INDEX;
+ d->dev_caps |= DST_INDEX;
+ d->dev_caps |= IS_BURST_ONLY4;
+ d->dev_caps |= CLEAR_CSR_ON_READ;
+ d->dev_caps |= IS_WORD_16;
+
+ d->lch_count = OMAP1_LOGICAL_DMA_CH_COUNT;
+
+ if (cpu_is_omap15xx())
+ d->chan_count = 9;
+ else if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
+ if (!(d->dev_caps & ENABLE_1510_MODE))
+ d->chan_count = 16;
+ else
+ d->chan_count = 9;
+ }
+
+ pdata->omap_dma_base = (void __iomem *)res[0].start;
+ dma_base = pdata->omap_dma_base;
+
+ d->dma_chan = kzalloc(sizeof(struct omap_dma_lch) *
+ (d->lch_count), GFP_KERNEL);
+
+ if (!d->dma_chan) {
+ dev_err(&pdev->dev, "%s: Memory allcation failed"
+ "for dma_chan!!!\n", __func__);
+ goto exit_release_pdata;
+ }
+
+ ret = platform_device_add_data(pdev, pdata, sizeof(*pdata));
+ if (ret) {
+ dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
+ __func__, pdev->name, pdev->id);
+ goto exit_release_dma_chan;
+ }
+ 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_release_dma_chan;
+ }
+
+exit_release_dma_chan:
+ kfree(d->dma_chan);
+exit_release_pdata:
+ kfree(pdata);
+exit_device_put:
+ platform_device_put(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..d446cdd
--- /dev/null
+++ b/arch/arm/mach-omap1/include/mach/dma.h
@@ -0,0 +1,80 @@
+/*
+ * OMAP DMA controller register offsets.
+ *
+ * Copyright (C) 2003 Nokia Corporation
+ * Author: Juha Yrjölä <juha.yrjola@xxxxxxxxx>
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Converted DMA library into platform driver by Manjunatha GK <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_OMAP1_DMA_H
+#define __ASM_ARCH_OMAP1_DMA_H
+/* Hardware registers for omap1 */
+#define OMAP1_DMA_BASE (0xfffed800)
+
+#define OMAP1_DMA_GCR 0x400
+#define OMAP1_DMA_GSCR 0x404
+#define OMAP1_DMA_GRST 0x408
+#define OMAP1_DMA_HW_ID 0x442
+#define OMAP1_DMA_PCH2_ID 0x444
+#define OMAP1_DMA_PCH0_ID 0x446
+#define OMAP1_DMA_PCH1_ID 0x448
+#define OMAP1_DMA_PCHG_ID 0x44a
+#define OMAP1_DMA_PCHD_ID 0x44c
+#define OMAP1_DMA_CAPS_0_U 0x44e
+#define OMAP1_DMA_CAPS_0_L 0x450
+#define OMAP1_DMA_CAPS_1_U 0x452
+#define OMAP1_DMA_CAPS_1_L 0x454
+#define OMAP1_DMA_CAPS_2 0x456
+#define OMAP1_DMA_CAPS_3 0x458
+#define OMAP1_DMA_CAPS_4 0x45a
+#define OMAP1_DMA_PCH2_SR 0x460
+#define OMAP1_DMA_PCH0_SR 0x480
+#define OMAP1_DMA_PCH1_SR 0x482
+#define OMAP1_DMA_PCHD_SR 0x4c0
+
+#define OMAP1_LOGICAL_DMA_CH_COUNT 17
+
+/* Common channel specific registers for omap1 */
+#define OMAP1_DMA_CH_BASE(n) (0x40 * (n) + 0x00)
+#define OMAP1_DMA_CSDP(n) (0x40 * (n) + 0x00)
+#define OMAP1_DMA_CCR(n) (0x40 * (n) + 0x02)
+#define OMAP1_DMA_CICR(n) (0x40 * (n) + 0x04)
+#define OMAP1_DMA_CSR(n) (0x40 * (n) + 0x06)
+#define OMAP1_DMA_CEN(n) (0x40 * (n) + 0x10)
+#define OMAP1_DMA_CFN(n) (0x40 * (n) + 0x12)
+#define OMAP1_DMA_CSFI(n) (0x40 * (n) + 0x14)
+#define OMAP1_DMA_CSEI(n) (0x40 * (n) + 0x16)
+#define OMAP1_DMA_CPC(n) (0x40 * (n) + 0x18) /* 15xx only */
+#define OMAP1_DMA_CSAC(n) (0x40 * (n) + 0x18)
+#define OMAP1_DMA_CDAC(n) (0x40 * (n) + 0x1a)
+#define OMAP1_DMA_CDEI(n) (0x40 * (n) + 0x1c)
+#define OMAP1_DMA_CDFI(n) (0x40 * (n) + 0x1e)
+#define OMAP1_DMA_CLNK_CTRL(n) (0x40 * (n) + 0x28)
+
+/* Channel specific registers only on omap1 */
+#define OMAP1_DMA_CSSA_L(n) (0x40 * (n) + 0x08)
+#define OMAP1_DMA_CSSA_U(n) (0x40 * (n) + 0x0a)
+#define OMAP1_DMA_CDSA_L(n) (0x40 * (n) + 0x0c)
+#define OMAP1_DMA_CDSA_U(n) (0x40 * (n) + 0x0e)
+#define OMAP1_DMA_COLOR_L(n) (0x40 * (n) + 0x20)
+#define OMAP1_DMA_COLOR_U(n) (0x40 * (n) + 0x22)
+#define OMAP1_DMA_CCR2(n) (0x40 * (n) + 0x24)
+#define OMAP1_DMA_LCH_CTRL(n) (0x40 * (n) + 0x2a)
+
+#endif /* __ASM_ARCH_OMAP1_DMA_H */
--
1.7.0.4
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