AHCI Add the AHCI SATA feature on the MX53 platforms (97915bdf) · Commits · 方亚芬 / linux

arch/arm/mach-mx5/clock-mx51-mx53.c

+19 −0

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		@@ -1401,6 +1401,22 @@ static struct clk esdhc4_mx53_clk = {
		.secondary = &esdhc4_ipg_clk,
		};

		static struct clk sata_clk = {
		.parent = &ipg_clk,
		.enable = _clk_max_enable,
		.enable_reg = MXC_CCM_CCGR4,
		.enable_shift = MXC_CCM_CCGRx_CG1_OFFSET,
		.disable = _clk_max_disable,
		};

		static struct clk ahci_phy_clk = {
		.parent = &usb_phy1_clk,
		};

		static struct clk ahci_dma_clk = {
		.parent = &ahb_clk,
		};

		DEFINE_CLOCK(mipi_esc_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG5_OFFSET, NULL, NULL, NULL, &pll2_sw_clk);
		DEFINE_CLOCK(mipi_hsc2_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG4_OFFSET, NULL, NULL, &mipi_esc_clk, &pll2_sw_clk);
		DEFINE_CLOCK(mipi_hsc1_clk, 0, MXC_CCM_CCGR4, MXC_CCM_CCGRx_CG3_OFFSET, NULL, NULL, &mipi_hsc2_clk, &pll2_sw_clk);
		@@ -1507,6 +1523,9 @@ static struct clk_lookup mx53_lookups[] = {
		_REGISTER_CLOCK("imx-ssi.1", NULL, ssi2_clk)
		_REGISTER_CLOCK("imx-ssi.2", NULL, ssi3_clk)
		_REGISTER_CLOCK("imx-keypad", NULL, dummy_clk)
		_REGISTER_CLOCK("imx53-ahci.0", "ahci", sata_clk)
		_REGISTER_CLOCK("imx53-ahci.0", "ahci_phy", ahci_phy_clk)
		_REGISTER_CLOCK("imx53-ahci.0", "ahci_dma", ahci_dma_clk)
		};

		static void clk_tree_init(void)

arch/arm/mach-mx5/devices-imx53.h

+2 −0

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		@@ -40,3 +40,5 @@ extern const struct imx_imx_ssi_data imx53_imx_ssi_data[];
		extern const struct imx_imx_keypad_data imx53_imx_keypad_data;
		#define imx53_add_imx_keypad(pdata) \
		imx_add_imx_keypad(&imx53_imx_keypad_data, pdata)

		extern struct platform_device *__init imx53_add_ahci_imx(void);

arch/arm/plat-mxc/devices/Kconfig

+4 −0

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		@@ -76,3 +76,7 @@ config IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX

		config IMX_HAVE_PLATFORM_SPI_IMX
		bool

		config IMX_HAVE_PLATFORM_AHCI
		bool
		default y if ARCH_MX53

arch/arm/plat-mxc/devices/Makefile

+1 −0

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		@@ -25,3 +25,4 @@ obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_RTC) += platform-mxc_rtc.o
		obj-$(CONFIG_IMX_HAVE_PLATFORM_MXC_W1) += platform-mxc_w1.o
		obj-$(CONFIG_IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX) += platform-sdhci-esdhc-imx.o
		obj-$(CONFIG_IMX_HAVE_PLATFORM_SPI_IMX) += platform-spi_imx.o
		obj-$(CONFIG_IMX_HAVE_PLATFORM_AHCI) += platform-ahci-imx.o

arch/arm/plat-mxc/devices/platform-ahci-imx.c

0 → 100644

+156 −0

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		/*
		* Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
		*/

		/*
		* 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.,
		* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
		*/

		#include <linux/io.h>
		#include <linux/clk.h>
		#include <linux/err.h>
		#include <linux/device.h>
		#include <linux/dma-mapping.h>
		#include <asm/sizes.h>
		#include <mach/hardware.h>
		#include <mach/devices-common.h>

		#define imx_ahci_imx_data_entry_single(soc, _devid) \
		{ \
		.devid = _devid, \
		.iobase = soc ## _SATA_BASE_ADDR, \
		.irq = soc ## _INT_SATA, \
		}

		#ifdef CONFIG_SOC_IMX53
		const struct imx_ahci_imx_data imx53_ahci_imx_data __initconst =
		imx_ahci_imx_data_entry_single(MX53, "imx53-ahci");
		#endif

		enum {
		HOST_CAP = 0x00,
		HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
		HOST_PORTS_IMPL = 0x0c,
		HOST_TIMER1MS = 0xe0, /* Timer 1-ms */
		};

		static struct clk sata_clk, sata_ref_clk;

		/* AHCI module Initialization, if return 0, initialization is successful. */
		static int imx_sata_init(struct device dev, void __iomem addr)
		{
		u32 tmpdata;
		int ret = 0;
		struct clk *clk;

		sata_clk = clk_get(dev, "ahci");
		if (IS_ERR(sata_clk)) {
		dev_err(dev, "no sata clock.\n");
		return PTR_ERR(sata_clk);
		}
		ret = clk_enable(sata_clk);
		if (ret) {
		dev_err(dev, "can't enable sata clock.\n");
		goto put_sata_clk;
		}

		/* Get the AHCI SATA PHY CLK */
		sata_ref_clk = clk_get(dev, "ahci_phy");
		if (IS_ERR(sata_ref_clk)) {
		dev_err(dev, "no sata ref clock.\n");
		ret = PTR_ERR(sata_ref_clk);
		goto release_sata_clk;
		}
		ret = clk_enable(sata_ref_clk);
		if (ret) {
		dev_err(dev, "can't enable sata ref clock.\n");
		goto put_sata_ref_clk;
		}

		/* Get the AHB clock rate, and configure the TIMER1MS reg later */
		clk = clk_get(dev, "ahci_dma");
		if (IS_ERR(clk)) {
		dev_err(dev, "no dma clock.\n");
		ret = PTR_ERR(clk);
		goto release_sata_ref_clk;
		}
		tmpdata = clk_get_rate(clk) / 1000;
		clk_put(clk);

		writel(tmpdata, addr + HOST_TIMER1MS);

		tmpdata = readl(addr + HOST_CAP);
		if (!(tmpdata & HOST_CAP_SSS)) {
		tmpdata \|= HOST_CAP_SSS;
		writel(tmpdata, addr + HOST_CAP);
		}

		if (!(readl(addr + HOST_PORTS_IMPL) & 0x1))
		writel((readl(addr + HOST_PORTS_IMPL) \| 0x1),
		addr + HOST_PORTS_IMPL);

		return 0;

		release_sata_ref_clk:
		clk_disable(sata_ref_clk);
		put_sata_ref_clk:
		clk_put(sata_ref_clk);
		release_sata_clk:
		clk_disable(sata_clk);
		put_sata_clk:
		clk_put(sata_clk);

		return ret;
		}

		static void imx_sata_exit(struct device *dev)
		{
		clk_disable(sata_ref_clk);
		clk_put(sata_ref_clk);

		clk_disable(sata_clk);
		clk_put(sata_clk);

		}
		struct platform_device *__init imx_add_ahci_imx(
		const struct imx_ahci_imx_data *data,
		const struct ahci_platform_data *pdata)
		{
		struct resource res[] = {
		{
		.start = data->iobase,
		.end = data->iobase + SZ_4K - 1,
		.flags = IORESOURCE_MEM,
		}, {
		.start = data->irq,
		.end = data->irq,
		.flags = IORESOURCE_IRQ,
		},
		};

		return imx_add_platform_device_dmamask(data->devid, 0,
		res, ARRAY_SIZE(res),
		pdata, sizeof(*pdata), DMA_BIT_MASK(32));
		}

		struct platform_device *__init imx53_add_ahci_imx(void)
		{
		struct ahci_platform_data pdata = {
		.init = imx_sata_init,
		.exit = imx_sata_exit,
		};

		return imx_add_ahci_imx(&imx53_ahci_imx_data, &pdata);
		}