OMAP1: DMA: Implement in platform device model
Implement OMAP1 DMA as platform device and add support for registering through platform device layer using resource structures. Signed-off-by: G, Manjunath Kondaiah <manjugk@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
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G, Manjunath Kondaiah
Tony Lindgren
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531ce0d57c
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6568f7c43a
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/*
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* OMAP1/OMAP7xx - specific DMA driver
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*
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* Copyright (C) 2003 - 2008 Nokia Corporation
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* Author: Juha Yrjölä <juha.yrjola@nokia.com>
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* DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
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* Graphics DMA and LCD DMA graphics tranformations
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* by Imre Deak <imre.deak@nokia.com>
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* OMAP2/3 support Copyright (C) 2004-2007 Texas Instruments, Inc.
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* Some functions based on earlier dma-omap.c Copyright (C) 2001 RidgeRun, Inc.
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*
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* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
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* Converted DMA library into platform driver
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* - G, Manjunath Kondaiah <manjugk@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include <plat/dma.h>
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#include <plat/tc.h>
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#include <plat/irqs.h>
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#define OMAP1_DMA_BASE (0xfffed800)
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static struct resource res[] __initdata = {
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[0] = {
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.start = OMAP1_DMA_BASE,
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.end = OMAP1_DMA_BASE + SZ_2K - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.name = "0",
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.start = INT_DMA_CH0_6,
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.flags = IORESOURCE_IRQ,
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},
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[2] = {
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.name = "1",
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.start = INT_DMA_CH1_7,
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.flags = IORESOURCE_IRQ,
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},
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[3] = {
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.name = "2",
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.start = INT_DMA_CH2_8,
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.flags = IORESOURCE_IRQ,
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},
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[4] = {
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.name = "3",
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.start = INT_DMA_CH3,
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.flags = IORESOURCE_IRQ,
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},
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[5] = {
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.name = "4",
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.start = INT_DMA_CH4,
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.flags = IORESOURCE_IRQ,
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},
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[6] = {
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.name = "5",
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.start = INT_DMA_CH5,
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.flags = IORESOURCE_IRQ,
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},
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[7] = {
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.name = "6",
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.start = INT_1610_DMA_CH6,
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.flags = IORESOURCE_IRQ,
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},
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/* irq's for omap16xx and omap7xx */
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[8] = {
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.name = "7",
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.start = INT_1610_DMA_CH7,
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.flags = IORESOURCE_IRQ,
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},
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[9] = {
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.name = "8",
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.start = INT_1610_DMA_CH8,
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.flags = IORESOURCE_IRQ,
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},
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[10] = {
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.name = "9",
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.start = INT_1610_DMA_CH9,
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.flags = IORESOURCE_IRQ,
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},
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[11] = {
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.name = "10",
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.start = INT_1610_DMA_CH10,
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.flags = IORESOURCE_IRQ,
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},
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[12] = {
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.name = "11",
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.start = INT_1610_DMA_CH11,
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.flags = IORESOURCE_IRQ,
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},
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[13] = {
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.name = "12",
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.start = INT_1610_DMA_CH12,
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.flags = IORESOURCE_IRQ,
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},
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[14] = {
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.name = "13",
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.start = INT_1610_DMA_CH13,
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.flags = IORESOURCE_IRQ,
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},
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[15] = {
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.name = "14",
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.start = INT_1610_DMA_CH14,
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.flags = IORESOURCE_IRQ,
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},
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[16] = {
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.name = "15",
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.start = INT_1610_DMA_CH15,
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.flags = IORESOURCE_IRQ,
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},
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[17] = {
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.name = "16",
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.start = INT_DMA_LCD,
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.flags = IORESOURCE_IRQ,
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},
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};
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static int __init omap1_system_dma_init(void)
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{
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struct omap_system_dma_plat_info *p;
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struct platform_device *pdev;
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int ret;
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pdev = platform_device_alloc("omap_dma_system", 0);
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if (!pdev) {
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pr_err("%s: Unable to device alloc for dma\n",
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__func__);
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return -ENOMEM;
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}
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ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res));
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if (ret) {
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dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
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__func__, pdev->name, pdev->id);
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goto exit_device_del;
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}
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p = kzalloc(sizeof(struct omap_system_dma_plat_info), GFP_KERNEL);
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if (!p) {
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dev_err(&pdev->dev, "%s: Unable to allocate 'p' for %s\n",
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__func__, pdev->name);
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ret = -ENOMEM;
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goto exit_device_put;
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}
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ret = platform_device_add_data(pdev, p, sizeof(*p));
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if (ret) {
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dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
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__func__, pdev->name, pdev->id);
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goto exit_device_put;
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}
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ret = platform_device_add(pdev);
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if (ret) {
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dev_err(&pdev->dev, "%s: Unable to add resources for %s%d\n",
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__func__, pdev->name, pdev->id);
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goto exit_device_put;
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}
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return ret;
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exit_device_put:
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platform_device_put(pdev);
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exit_device_del:
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platform_device_del(pdev);
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return ret;
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}
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arch_initcall(omap1_system_dma_init);
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