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Kernel: Add SATA support on imx6 wandboard.
The imx6q wandboard has a soldered SATA port which can be used by loading the ahci_imx kernel module.
This commit is contained in:
Stefan Schantl
@@ -0,0 +1,85 @@
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From 8e890a259208dbe3aba6f46f7c3a213269d8f123 Mon Sep 17 00:00:00 2001
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From: Allen Ibara <allen@zee.aero>
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Date: Tue, 4 Dec 2012 20:44:26 -0800
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Subject: [PATCH 2/5] Add IMX6Q AHCI support
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Adds ahci_platform bits to make AHCI work on sabrelite IMX6Q board.
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Signed-off-by: Allen Ibara <allen@zee.aero>
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Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
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---
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diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
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index 7a8a284..d324cdf 100644
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--- a/drivers/ata/ahci_platform.c
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+++ b/drivers/ata/ahci_platform.c
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@@ -23,6 +23,9 @@
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#include <linux/platform_device.h>
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#include <linux/libata.h>
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#include <linux/ahci_platform.h>
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+#include <linux/of.h>
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+#include <linux/of_device.h>
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+#include <linux/of_gpio.h>
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#include "ahci.h"
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static void ahci_host_stop(struct ata_host *host);
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@@ -30,6 +33,7 @@ static void ahci_host_stop(struct ata_host *host);
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enum ahci_type {
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AHCI, /* standard platform ahci */
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IMX53_AHCI, /* ahci on i.mx53 */
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+ IMX6Q_AHCI, /* ahci on i.mx6q */
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STRICT_AHCI, /* delayed DMA engine start */
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};
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@@ -41,6 +45,9 @@ static struct platform_device_id ahci_devtype[] = {
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.name = "imx53-ahci",
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.driver_data = IMX53_AHCI,
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}, {
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+ .name = "imx6q-ahci",
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+ .driver_data = IMX53_AHCI,
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+ }, {
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.name = "strict-ahci",
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.driver_data = STRICT_AHCI,
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}, {
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@@ -86,12 +93,24 @@ static struct scsi_host_template ahci_platform_sht = {
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AHCI_SHT("ahci_platform"),
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};
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+static const struct of_device_id ahci_of_match[] = {
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+ { .compatible = "calxeda,hb-ahci", .data = &ahci_devtype[AHCI],},
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+ { .compatible = "fsl,imx6q-ahci", .data = &ahci_devtype[IMX6Q_AHCI],},
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+ { .compatible = "snps,spear-ahci", },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, ahci_of_match);
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+
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static int ahci_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ahci_platform_data *pdata = dev_get_platdata(dev);
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+ const struct of_device_id *of_id =
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+ of_match_device(ahci_of_match, &pdev->dev);
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+ const struct platform_device_id *id_entry = of_id->data;
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const struct platform_device_id *id = platform_get_device_id(pdev);
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- struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0];
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+ struct ata_port_info pi = ahci_port_info[id ? id->driver_data : \
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+ id_entry->driver_data];
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const struct ata_port_info *ppi[] = { &pi, NULL };
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struct ahci_host_priv *hpriv;
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struct ata_host *host;
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@@ -325,12 +344,6 @@ disable_unprepare_clk:
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static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_suspend, ahci_resume);
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-static const struct of_device_id ahci_of_match[] = {
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- { .compatible = "snps,spear-ahci", },
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- {},
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-};
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-MODULE_DEVICE_TABLE(of, ahci_of_match);
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-
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static struct platform_driver ahci_driver = {
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.probe = ahci_probe,
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.remove = ata_platform_remove_one,
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--
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1.7.10.4
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@@ -0,0 +1,25 @@
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From 41cc1967181a833c3c5af30682ea85dd01c28ff4 Mon Sep 17 00:00:00 2001
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From: Robert Nelson <robertcnelson@gmail.com>
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Date: Tue, 22 Jan 2013 22:21:03 -0600
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Subject: [PATCH 3/5] imx: Add IMX53 AHCI support
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Adds ahci_platform bits to make AHCI work on mx53 qsb board.
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Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
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---
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diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
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index d324cdf..b01eeca 100644
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--- a/drivers/ata/ahci_platform.c
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+++ b/drivers/ata/ahci_platform.c
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@@ -95,6 +95,7 @@ static struct scsi_host_template ahci_platform_sht = {
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static const struct of_device_id ahci_of_match[] = {
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{ .compatible = "calxeda,hb-ahci", .data = &ahci_devtype[AHCI],},
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+ { .compatible = "fsl,imx53-ahci", .data = &ahci_devtype[IMX53_AHCI],},
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{ .compatible = "fsl,imx6q-ahci", .data = &ahci_devtype[IMX6Q_AHCI],},
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{ .compatible = "snps,spear-ahci", },
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{},
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--
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1.7.10.4
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@@ -0,0 +1,33 @@
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From 765561c8c72a46c2177b20d730e061ab2ff8f970 Mon Sep 17 00:00:00 2001
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From: Paolo Pisati <paolo.pisati@canonical.com>
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Date: Thu, 31 Jan 2013 18:33:46 +0100
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Subject: [PATCH 4/5] SAUCE: imx6: enable sata clk if SATA_AHCI_PLATFORM
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Clock modifications in 24d340ac "ARM i.MX6: Fix ethernet PLL clocks" broke the
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SATA clk, fix it.
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More info: http://www.spinics.net/lists/arm-kernel/msg221503.html
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Original-code-from: Shawn Guo <shawn.guo@linaro.org>
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Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
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---
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arch/arm/mach-imx/clk-imx6q.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/arch/arm/mach-imx/clk-imx6q.c b/arch/arm/mach-imx/clk-imx6q.c
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index 4e3148c..38d707a 100644
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--- a/arch/arm/mach-imx/clk-imx6q.c
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+++ b/arch/arm/mach-imx/clk-imx6q.c
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@@ -568,6 +568,9 @@ int __init mx6q_clocks_init(void)
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clk_prepare_enable(clk[usbphy2_gate]);
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}
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+ if (IS_ENABLED(CONFIG_SATA_AHCI_PLATFORM))
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+ clk_prepare_enable(clk[sata_ref_100m]);
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+
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/* Set initial power mode */
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imx6q_set_lpm(WAIT_CLOCKED);
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--
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1.7.10.4
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@@ -0,0 +1,150 @@
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From 371863a788db77e6092d69df17d8884cb0d94270 Mon Sep 17 00:00:00 2001
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From: Richard Zhu <r65037@freescale.com>
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Date: Wed, 24 Jul 2013 06:15:28 +0000
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Subject: [PATCH 1/2] ARM: imx6q: update the sata bits definitions of gpr13
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Replace the SATA_PHY_# by the more readable definitons.
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tj: Being routed through libata branch to enable implementation of
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ahci_imx.
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Signed-off-by: Richard Zhu <r65037@freescale.com>
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Acked-by: Shawn Guo <shawn.guo@linaro.org>
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Signed-off-by: Tejun Heo <tj@kernel.org>
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---
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include/linux/mfd/syscon/imx6q-iomuxc-gpr.h | 121 +++++++++++++++++++--------
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1 file changed, 84 insertions(+), 37 deletions(-)
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diff --git a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h
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index b1521e8..b6bdcd6 100644
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--- a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h
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+++ b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h
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@@ -279,41 +279,88 @@
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#define IMX6Q_GPR13_CAN2_STOP_REQ BIT(29)
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#define IMX6Q_GPR13_CAN1_STOP_REQ BIT(28)
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#define IMX6Q_GPR13_ENET_STOP_REQ BIT(27)
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-#define IMX6Q_GPR13_SATA_PHY_8_MASK (0x7 << 24)
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-#define IMX6Q_GPR13_SATA_PHY_8_0_5_DB (0x0 << 24)
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-#define IMX6Q_GPR13_SATA_PHY_8_1_0_DB (0x1 << 24)
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-#define IMX6Q_GPR13_SATA_PHY_8_1_5_DB (0x2 << 24)
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-#define IMX6Q_GPR13_SATA_PHY_8_2_0_DB (0x3 << 24)
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-#define IMX6Q_GPR13_SATA_PHY_8_2_5_DB (0x4 << 24)
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-#define IMX6Q_GPR13_SATA_PHY_8_3_0_DB (0x5 << 24)
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-#define IMX6Q_GPR13_SATA_PHY_8_3_5_DB (0x6 << 24)
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-#define IMX6Q_GPR13_SATA_PHY_8_4_0_DB (0x7 << 24)
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-#define IMX6Q_GPR13_SATA_PHY_7_MASK (0x1f << 19)
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-#define IMX6Q_GPR13_SATA_PHY_7_SATA1I (0x10 << 19)
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-#define IMX6Q_GPR13_SATA_PHY_7_SATA1M (0x10 << 19)
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-#define IMX6Q_GPR13_SATA_PHY_7_SATA1X (0x1a << 19)
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-#define IMX6Q_GPR13_SATA_PHY_7_SATA2I (0x12 << 19)
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-#define IMX6Q_GPR13_SATA_PHY_7_SATA2M (0x12 << 19)
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-#define IMX6Q_GPR13_SATA_PHY_7_SATA2X (0x1a << 19)
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-#define IMX6Q_GPR13_SATA_PHY_6_MASK (0x7 << 16)
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-#define IMX6Q_GPR13_SATA_SPEED_MASK BIT(15)
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-#define IMX6Q_GPR13_SATA_SPEED_1P5G 0x0
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-#define IMX6Q_GPR13_SATA_SPEED_3P0G BIT(15)
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-#define IMX6Q_GPR13_SATA_PHY_5 BIT(14)
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-#define IMX6Q_GPR13_SATA_PHY_4_MASK (0x7 << 11)
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-#define IMX6Q_GPR13_SATA_PHY_4_16_16 (0x0 << 11)
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-#define IMX6Q_GPR13_SATA_PHY_4_14_16 (0x1 << 11)
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-#define IMX6Q_GPR13_SATA_PHY_4_12_16 (0x2 << 11)
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-#define IMX6Q_GPR13_SATA_PHY_4_10_16 (0x3 << 11)
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-#define IMX6Q_GPR13_SATA_PHY_4_9_16 (0x4 << 11)
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-#define IMX6Q_GPR13_SATA_PHY_4_8_16 (0x5 << 11)
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-#define IMX6Q_GPR13_SATA_PHY_3_MASK (0xf << 7)
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-#define IMX6Q_GPR13_SATA_PHY_3_OFF 0x7
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-#define IMX6Q_GPR13_SATA_PHY_2_MASK (0x1f << 2)
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-#define IMX6Q_GPR13_SATA_PHY_2_OFF 0x2
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-#define IMX6Q_GPR13_SATA_PHY_1_MASK (0x3 << 0)
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-#define IMX6Q_GPR13_SATA_PHY_1_FAST (0x0 << 0)
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-#define IMX6Q_GPR13_SATA_PHY_1_MED (0x1 << 0)
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-#define IMX6Q_GPR13_SATA_PHY_1_SLOW (0x2 << 0)
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-
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+#define IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK (0x7 << 24)
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+#define IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB (0x0 << 24)
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+#define IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB (0x1 << 24)
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+#define IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB (0x2 << 24)
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+#define IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB (0x3 << 24)
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+#define IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB (0x4 << 24)
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+#define IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB (0x5 << 24)
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+#define IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB (0x6 << 24)
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+#define IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB (0x7 << 24)
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+#define IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK (0x1f << 19)
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+#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA1I (0x10 << 19)
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+#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA1M (0x10 << 19)
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+#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA1X (0x1a << 19)
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+#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2I (0x12 << 19)
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+#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M (0x12 << 19)
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+#define IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2X (0x1a << 19)
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+#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK (0x7 << 16)
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+#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_1P_1F (0x0 << 16)
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+#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_2F (0x1 << 16)
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+#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_1P_4F (0x2 << 16)
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+#define IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F (0x3 << 16)
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+#define IMX6Q_GPR13_SATA_SPD_MODE_MASK BIT(15)
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+#define IMX6Q_GPR13_SATA_SPD_MODE_1P5G 0x0
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+#define IMX6Q_GPR13_SATA_SPD_MODE_3P0G BIT(15)
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+#define IMX6Q_GPR13_SATA_MPLL_SS_EN BIT(14)
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+#define IMX6Q_GPR13_SATA_TX_ATTEN_MASK (0x7 << 11)
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+#define IMX6Q_GPR13_SATA_TX_ATTEN_16_16 (0x0 << 11)
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+#define IMX6Q_GPR13_SATA_TX_ATTEN_14_16 (0x1 << 11)
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+#define IMX6Q_GPR13_SATA_TX_ATTEN_12_16 (0x2 << 11)
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+#define IMX6Q_GPR13_SATA_TX_ATTEN_10_16 (0x3 << 11)
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+#define IMX6Q_GPR13_SATA_TX_ATTEN_9_16 (0x4 << 11)
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+#define IMX6Q_GPR13_SATA_TX_ATTEN_8_16 (0x5 << 11)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_MASK (0xf << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB (0x0 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB (0x1 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB (0x2 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB (0x3 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB (0x4 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB (0x5 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB (0x6 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB (0x7 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB (0x8 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB (0x9 << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB (0xa << 7)
|
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+#define IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB (0xb << 7)
|
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+#define IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB (0xc << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB (0xd << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB (0xe << 7)
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+#define IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB (0xf << 7)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_MASK (0x1f << 2)
|
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+#define IMX6Q_GPR13_SATA_TX_LVL_0_937_V (0x00 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_0_947_V (0x01 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_0_957_V (0x02 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_0_966_V (0x03 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_0_976_V (0x04 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_0_986_V (0x05 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_0_996_V (0x06 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_005_V (0x07 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_015_V (0x08 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_025_V (0x09 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_035_V (0x0a << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_045_V (0x0b << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_054_V (0x0c << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_064_V (0x0d << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_074_V (0x0e << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_084_V (0x0f << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_094_V (0x10 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_104_V (0x11 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_113_V (0x12 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_123_V (0x13 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_133_V (0x14 << 2)
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_143_V (0x15 << 2)
|
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+#define IMX6Q_GPR13_SATA_TX_LVL_1_152_V (0x16 << 2)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_1_162_V (0x17 << 2)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_1_172_V (0x18 << 2)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_1_182_V (0x19 << 2)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_1_191_V (0x1a << 2)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_1_201_V (0x1b << 2)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_1_211_V (0x1c << 2)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_1_221_V (0x1d << 2)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_1_230_V (0x1e << 2)
|
||||
+#define IMX6Q_GPR13_SATA_TX_LVL_1_240_V (0x1f << 2)
|
||||
+#define IMX6Q_GPR13_SATA_MPLL_CLK_EN BIT(1)
|
||||
+#define IMX6Q_GPR13_SATA_TX_EDGE_RATE BIT(0)
|
||||
#endif /* __LINUX_IMX6Q_IOMUXC_GPR_H */
|
||||
--
|
||||
1.7.10.4
|
||||
|
||||
@@ -0,0 +1,316 @@
|
||||
From 093f4fdd74f29031d79be747c65b95fb16601a92 Mon Sep 17 00:00:00 2001
|
||||
From: Richard Zhu <r65037@freescale.com>
|
||||
Date: Wed, 24 Jul 2013 06:15:29 +0000
|
||||
Subject: [PATCH 2/2] 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
|
||||
|
||||
diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
|
||||
index 80dc988..cbf7a16 100644
|
||||
--- 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
|
||||
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
|
||||
index c04d0fd..46518c6 100644
|
||||
--- a/drivers/ata/Makefile
|
||||
+++ b/drivers/ata/Makefile
|
||||
@@ -10,6 +10,7 @@ obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o
|
||||
obj-$(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
|
||||
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
|
||||
new file mode 100644
|
||||
index 0000000..58debb0
|
||||
--- /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");
|
||||
--
|
||||
1.7.10.4
|
||||
|
||||
@@ -0,0 +1,24 @@
|
||||
From: Tejun Heo <tj@kernel.org>
|
||||
Subject: [PATCH] ahci_imx: depend on CONFIG_MFD_SYSCON
|
||||
|
||||
ahci_imx makes use of regmap but the dependency wasn't specified in
|
||||
Kconfig leading build failures if CONFIG_AHCI_IMX is enabled but
|
||||
CONFIG_MFD_SYSCON is not. Add the Kconfig dependency.
|
||||
|
||||
Signed-off-by: Tejun Heo <tj@kernel.org>
|
||||
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
|
||||
---
|
||||
drivers/ata/Kconfig | 2 +-
|
||||
1 file changed, 1 insertion(+), 1 deletion(-)
|
||||
|
||||
--- a/drivers/ata/Kconfig
|
||||
+++ b/drivers/ata/Kconfig
|
||||
@@ -99,7 +99,7 @@ config SATA_AHCI_PLATFORM
|
||||
|
||||
config AHCI_IMX
|
||||
tristate "Freescale i.MX AHCI SATA support"
|
||||
- depends on SATA_AHCI_PLATFORM
|
||||
+ depends on SATA_AHCI_PLATFORM && MFD_SYSCON
|
||||
help
|
||||
This option enables support for the Freescale i.MX SoC's
|
||||
onboard AHCI SATA.
|
||||
Reference in New Issue
Block a user