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4de3a8fa33
The APB DMA block handles DMA transfers to and from some peripherals in the Tegra SOC. It reads from sequential addresses on the memory bus, and writes repeatedly to the same address on the APB bus. Two transfer modes are supported, oneshot for transferring a known size to or from a peripheral, and continuous for streaming data. In continuous mode, a callback occurs when the buffer is half full to allow the existing data to be handled and a new request queued.x v2 changes: dma API no longer uses PTR_ERR Signed-off-by: Erik Gilling <konkers@android.com> Signed-off-by: Colin Cross <ccross@android.com>
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/*
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* arch/arm/mach-tegra/board-harmony.c
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*
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* Copyright (C) 2010 Google, Inc.
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*
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* Author:
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* Colin Cross <ccross@android.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <asm/hardware/cache-l2x0.h>
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#include <mach/iomap.h>
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#include <mach/dma.h>
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#include "board.h"
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#include "clock.h"
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#include "fuse.h"
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static __initdata struct tegra_clk_init_table common_clk_init_table[] = {
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/* name parent rate enabled */
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{ "clk_m", NULL, 0, true },
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{ "pll_p", "clk_m", 216000000, true },
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{ "pll_p_out1", "pll_p", 28800000, true },
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{ "pll_p_out2", "pll_p", 48000000, true },
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{ "pll_p_out3", "pll_p", 72000000, true },
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{ "pll_p_out4", "pll_p", 108000000, true },
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{ "sclk", "pll_p_out4", 108000000, true },
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{ "hclk", "sclk", 108000000, true },
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{ "pclk", "hclk", 54000000, true },
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{ NULL, NULL, 0, 0},
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};
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void __init tegra_init_cache(void)
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{
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#ifdef CONFIG_CACHE_L2X0
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void __iomem *p = IO_ADDRESS(TEGRA_ARM_PERIF_BASE) + 0x3000;
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writel(0x331, p + L2X0_TAG_LATENCY_CTRL);
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writel(0x441, p + L2X0_DATA_LATENCY_CTRL);
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l2x0_init(p, 0x6C080001, 0x8200c3fe);
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#endif
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}
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void __init tegra_common_init(void)
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{
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tegra_init_fuse();
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tegra_init_clock();
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tegra_clk_init_from_table(common_clk_init_table);
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tegra_init_cache();
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#ifdef CONFIG_TEGRA_SYSTEM_DMA
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tegra_dma_init();
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#endif
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}
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