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@xxxxxx> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Cc: Kevin Hilman <khilman@xxxxxxxxxxxxxxxxxxx> Cc: Tony Lindgren <tony@xxxxxxxxxxx> Cc: Santosh Shilimkar <santosh.shilimkar@xxxxxx> Cc: Benoit Cousson <b-cousson@xxxxxx> --- arch/arm/mach-omap1/dma.c | 179 +++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 179 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-omap1/dma.c diff --git a/arch/arm/mach-omap1/dma.c b/arch/arm/mach-omap1/dma.c new file mode 100644 index 0000000..b56ee21 --- /dev/null +++ b/arch/arm/mach-omap1/dma.c @@ -0,0 +1,179 @@ +/* + * OMAP1/OMAP7xx - specific DMA driver + * + * 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 Incorporated - http://www.ti.com/ + * 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/io.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/device.h> + +#include <plat/dma.h> +#include <plat/tc.h> +#include <plat/irqs.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) { + dev_err(&pdev->dev, "%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); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
