aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/imx6/patches-3.10/0005-ahci_imx-add-ahci-sata-support-on-imx-platforms.patch
diff options
context:
space:
mode:
authorLuka Perkov <luka@openwrt.org>2013-09-10 22:26:36 +0000
committerLuka Perkov <luka@openwrt.org>2013-09-10 22:26:36 +0000
commit2964a119330f638cb68665387f2f6765d5f17d07 (patch)
treef83c154cee1aa8f333afe0814da358715b6a1ee6 /target/linux/imx6/patches-3.10/0005-ahci_imx-add-ahci-sata-support-on-imx-platforms.patch
parentb2c852e685aaf6bef83fa60e5a98b0bc000e4cb2 (diff)
downloadupstream-2964a119330f638cb68665387f2f6765d5f17d07.tar.gz
upstream-2964a119330f638cb68665387f2f6765d5f17d07.tar.bz2
upstream-2964a119330f638cb68665387f2f6765d5f17d07.zip
imx6: backport ahci support
Signed-off-by: Tim Harvey <tharvey@gateworks.com> Signed-off-by: Luka Perkov <luka@openwrt.org> SVN-Revision: 37936
Diffstat (limited to 'target/linux/imx6/patches-3.10/0005-ahci_imx-add-ahci-sata-support-on-imx-platforms.patch')
-rw-r--r--target/linux/imx6/patches-3.10/0005-ahci_imx-add-ahci-sata-support-on-imx-platforms.patch306
1 files changed, 306 insertions, 0 deletions
diff --git a/target/linux/imx6/patches-3.10/0005-ahci_imx-add-ahci-sata-support-on-imx-platforms.patch b/target/linux/imx6/patches-3.10/0005-ahci_imx-add-ahci-sata-support-on-imx-platforms.patch
new file mode 100644
index 0000000000..1adb41d25f
--- /dev/null
+++ b/target/linux/imx6/patches-3.10/0005-ahci_imx-add-ahci-sata-support-on-imx-platforms.patch
@@ -0,0 +1,306 @@
+From 9e54eae23bc9cca0d8a955018c35b1250e09a73a Mon Sep 17 00:00:00 2001
+From: Richard Zhu <r65037@freescale.com>
+Date: Wed, 24 Jul 2013 14:15:29 +0800
+Subject: [PATCH] ahci_imx: add ahci sata support on imx platforms
+
+imx6q contains one Synopsys AHCI SATA controller, But it can't share
+ahci_platform driver with other controllers because there are some
+misalignments of the generic AHCI controller - the bits definitions of
+the HBA registers, the Vendor Specific registers, the AHCI PHY clock
+and the AHCI signals adjustment window(GPR13 register).
+
+ - CAP_SSS(bit20) of the HOST_CAP is writable, default value is '0',
+ should be configured to be '1'
+
+ - bit0 (only one AHCI SATA port on imx6q) of the HOST_PORTS_IMPL
+ should be set to be '1'.(default 0)
+
+ - One Vendor Specific register HOST_TIMER1MS(offset:0xe0) should be
+ configured regarding to the frequency of AHB bus clock.
+
+ - Configurations of the AHCI PHY clock, and the signal parameters of
+ the GPR13
+
+Setup its own ahci sata driver, contained the imx6q specific
+initialized codes, re-use the generic ahci_platform driver, and keep
+the generic ahci_platform driver clean as much as possible.
+
+tj: patch description reformatted
+
+Signed-off-by: Richard Zhu <r65037@freescale.com>
+Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
+Signed-off-by: Tejun Heo <tj@kernel.org>
+---
+ drivers/ata/Kconfig | 9 ++
+ drivers/ata/Makefile | 1 +
+ drivers/ata/ahci_imx.c | 236 +++++++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 246 insertions(+)
+ create mode 100644 drivers/ata/ahci_imx.c
+
+--- a/drivers/ata/Kconfig
++++ b/drivers/ata/Kconfig
+@@ -97,6 +97,15 @@ config SATA_AHCI_PLATFORM
+
+ If unsure, say N.
+
++config AHCI_IMX
++ tristate "Freescale i.MX AHCI SATA support"
++ depends on SATA_AHCI_PLATFORM
++ help
++ This option enables support for the Freescale i.MX SoC's
++ onboard AHCI SATA.
++
++ If unsure, say N.
++
+ config SATA_FSL
+ tristate "Freescale 3.0Gbps SATA support"
+ depends on FSL_SOC
+--- a/drivers/ata/Makefile
++++ b/drivers/ata/Makefile
+@@ -10,6 +10,7 @@ obj-$(CONFIG_SATA_INIC162X) += sata_inic
+ obj-$(CONFIG_SATA_SIL24) += sata_sil24.o
+ obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o
+ obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o
++obj-$(CONFIG_AHCI_IMX) += ahci_imx.o
+
+ # SFF w/ custom DMA
+ obj-$(CONFIG_PDC_ADMA) += pdc_adma.o
+--- /dev/null
++++ b/drivers/ata/ahci_imx.c
+@@ -0,0 +1,236 @@
++/*
++ * Freescale IMX AHCI SATA platform driver
++ * Copyright 2013 Freescale Semiconductor, Inc.
++ *
++ * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms and conditions of the GNU General Public License,
++ * version 2, as published by the Free Software Foundation.
++ *
++ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/regmap.h>
++#include <linux/ahci_platform.h>
++#include <linux/of_device.h>
++#include <linux/mfd/syscon.h>
++#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
++#include "ahci.h"
++
++enum {
++ HOST_TIMER1MS = 0xe0, /* Timer 1-ms */
++};
++
++struct imx_ahci_priv {
++ struct platform_device *ahci_pdev;
++ struct clk *sata_ref_clk;
++ struct clk *ahb_clk;
++ struct regmap *gpr;
++};
++
++static int imx6q_sata_init(struct device *dev, void __iomem *mmio)
++{
++ int ret = 0;
++ unsigned int reg_val;
++ struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent);
++
++ imxpriv->gpr =
++ syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
++ if (IS_ERR(imxpriv->gpr)) {
++ dev_err(dev, "failed to find fsl,imx6q-iomux-gpr regmap\n");
++ return PTR_ERR(imxpriv->gpr);
++ }
++
++ ret = clk_prepare_enable(imxpriv->sata_ref_clk);
++ if (ret < 0) {
++ dev_err(dev, "prepare-enable sata_ref clock err:%d\n", ret);
++ return ret;
++ }
++
++ /*
++ * set PHY Paremeters, two steps to configure the GPR13,
++ * one write for rest of parameters, mask of first write
++ * is 0x07fffffd, and the other one write for setting
++ * the mpll_clk_en.
++ */
++ regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK
++ | IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK
++ | IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK
++ | IMX6Q_GPR13_SATA_SPD_MODE_MASK
++ | IMX6Q_GPR13_SATA_MPLL_SS_EN
++ | IMX6Q_GPR13_SATA_TX_ATTEN_MASK
++ | IMX6Q_GPR13_SATA_TX_BOOST_MASK
++ | IMX6Q_GPR13_SATA_TX_LVL_MASK
++ | IMX6Q_GPR13_SATA_TX_EDGE_RATE
++ , IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB
++ | IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M
++ | IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F
++ | IMX6Q_GPR13_SATA_SPD_MODE_3P0G
++ | IMX6Q_GPR13_SATA_MPLL_SS_EN
++ | IMX6Q_GPR13_SATA_TX_ATTEN_9_16
++ | IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB
++ | IMX6Q_GPR13_SATA_TX_LVL_1_025_V);
++ regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_MPLL_CLK_EN,
++ IMX6Q_GPR13_SATA_MPLL_CLK_EN);
++ usleep_range(100, 200);
++
++ /*
++ * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL,
++ * and IP vendor specific register HOST_TIMER1MS.
++ * Configure CAP_SSS (support stagered spin up).
++ * Implement the port0.
++ * Get the ahb clock rate, and configure the TIMER1MS register.
++ */
++ reg_val = readl(mmio + HOST_CAP);
++ if (!(reg_val & HOST_CAP_SSS)) {
++ reg_val |= HOST_CAP_SSS;
++ writel(reg_val, mmio + HOST_CAP);
++ }
++ reg_val = readl(mmio + HOST_PORTS_IMPL);
++ if (!(reg_val & 0x1)) {
++ reg_val |= 0x1;
++ writel(reg_val, mmio + HOST_PORTS_IMPL);
++ }
++
++ reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
++ writel(reg_val, mmio + HOST_TIMER1MS);
++
++ return 0;
++}
++
++static void imx6q_sata_exit(struct device *dev)
++{
++ struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent);
++
++ regmap_update_bits(imxpriv->gpr, 0x34, IMX6Q_GPR13_SATA_MPLL_CLK_EN,
++ !IMX6Q_GPR13_SATA_MPLL_CLK_EN);
++ clk_disable_unprepare(imxpriv->sata_ref_clk);
++}
++
++static struct ahci_platform_data imx6q_sata_pdata = {
++ .init = imx6q_sata_init,
++ .exit = imx6q_sata_exit,
++};
++
++static const struct of_device_id imx_ahci_of_match[] = {
++ { .compatible = "fsl,imx6q-ahci", .data = &imx6q_sata_pdata},
++ {},
++};
++MODULE_DEVICE_TABLE(of, imx_ahci_of_match);
++
++static int imx_ahci_probe(struct platform_device *pdev)
++{
++ struct device *dev = &pdev->dev;
++ struct resource *mem, *irq, res[2];
++ const struct of_device_id *of_id;
++ const struct ahci_platform_data *pdata = NULL;
++ struct imx_ahci_priv *imxpriv;
++ struct device *ahci_dev;
++ struct platform_device *ahci_pdev;
++ int ret;
++
++ imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
++ if (!imxpriv) {
++ dev_err(dev, "can't alloc ahci_host_priv\n");
++ return -ENOMEM;
++ }
++
++ ahci_pdev = platform_device_alloc("ahci", -1);
++ if (!ahci_pdev)
++ return -ENODEV;
++
++ ahci_dev = &ahci_pdev->dev;
++ ahci_dev->parent = dev;
++
++ imxpriv->ahb_clk = devm_clk_get(dev, "ahb");
++ if (IS_ERR(imxpriv->ahb_clk)) {
++ dev_err(dev, "can't get ahb clock.\n");
++ ret = PTR_ERR(imxpriv->ahb_clk);
++ goto err_out;
++ }
++
++ imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref");
++ if (IS_ERR(imxpriv->sata_ref_clk)) {
++ dev_err(dev, "can't get sata_ref clock.\n");
++ ret = PTR_ERR(imxpriv->sata_ref_clk);
++ goto err_out;
++ }
++
++ imxpriv->ahci_pdev = ahci_pdev;
++ platform_set_drvdata(pdev, imxpriv);
++
++ of_id = of_match_device(imx_ahci_of_match, dev);
++ if (of_id) {
++ pdata = of_id->data;
++ } else {
++ ret = -EINVAL;
++ goto err_out;
++ }
++
++ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
++ if (!mem || !irq) {
++ dev_err(dev, "no mmio/irq resource\n");
++ ret = -ENOMEM;
++ goto err_out;
++ }
++
++ res[0] = *mem;
++ res[1] = *irq;
++
++ ahci_dev->coherent_dma_mask = DMA_BIT_MASK(32);
++ ahci_dev->dma_mask = &ahci_dev->coherent_dma_mask;
++ ahci_dev->of_node = dev->of_node;
++
++ ret = platform_device_add_resources(ahci_pdev, res, 2);
++ if (ret)
++ goto err_out;
++
++ ret = platform_device_add_data(ahci_pdev, pdata, sizeof(*pdata));
++ if (ret)
++ goto err_out;
++
++ ret = platform_device_add(ahci_pdev);
++ if (ret) {
++err_out:
++ platform_device_put(ahci_pdev);
++ return ret;
++ }
++
++ return 0;
++}
++
++static int imx_ahci_remove(struct platform_device *pdev)
++{
++ struct imx_ahci_priv *imxpriv = platform_get_drvdata(pdev);
++ struct platform_device *ahci_pdev = imxpriv->ahci_pdev;
++
++ platform_device_unregister(ahci_pdev);
++ return 0;
++}
++
++static struct platform_driver imx_ahci_driver = {
++ .probe = imx_ahci_probe,
++ .remove = imx_ahci_remove,
++ .driver = {
++ .name = "ahci-imx",
++ .owner = THIS_MODULE,
++ .of_match_table = imx_ahci_of_match,
++ },
++};
++module_platform_driver(imx_ahci_driver);
++
++MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver");
++MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>");
++MODULE_LICENSE("GPL");
++MODULE_ALIAS("ahci:imx");