02629d8f87
Targets were build tested and patches are refreshed. Signed-off-by: Luka Perkov <luka@openwrt.org> SVN-Revision: 42463
136 lines
4 KiB
Diff
136 lines
4 KiB
Diff
From c5ea64dcf7b5d45e402e78b9f291d521669b7b80 Mon Sep 17 00:00:00 2001
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From: Kumar Gala <galak@codeaurora.org>
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Date: Fri, 30 May 2014 15:35:40 -0500
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Subject: [PATCH 142/182] ata: Add Qualcomm ARM SoC AHCI SATA host controller
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driver
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Add support for the Qualcomm AHCI SATA controller that exists on several
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SoC and specifically the IPQ806x family of chips. The IPQ806x SATA support
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requires the associated IPQ806x SATA PHY Driver to be enabled as well.
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Signed-off-by: Kumar Gala <galak@codeaurora.org>
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---
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drivers/ata/Kconfig | 10 ++++++
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drivers/ata/Makefile | 1 +
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drivers/ata/ahci_qcom.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++
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3 files changed, 97 insertions(+)
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create mode 100644 drivers/ata/ahci_qcom.c
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--- a/drivers/ata/Kconfig
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+++ b/drivers/ata/Kconfig
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@@ -106,6 +106,16 @@ config AHCI_IMX
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If unsure, say N.
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+config AHCI_QCOM
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+ tristate "Qualcomm AHCI SATA support"
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+ depends on ARCH_QCOM
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+ help
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+ This option enables support for AHCI SATA controller
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+ integrated into Qualcomm ARM SoC chipsets. For more
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+ information please refer to http://www.qualcomm.com/chipsets.
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+
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+ If unsure, say N.
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+
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config SATA_FSL
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tristate "Freescale 3.0Gbps SATA support"
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depends on FSL_SOC
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--- a/drivers/ata/Makefile
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+++ b/drivers/ata/Makefile
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@@ -11,6 +11,7 @@ obj-$(CONFIG_SATA_SIL24) += sata_sil24.o
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obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o
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obj-$(CONFIG_SATA_HIGHBANK) += sata_highbank.o libahci.o
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obj-$(CONFIG_AHCI_IMX) += ahci_imx.o libahci.o libahci_platform.o
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+obj-$(CONFIG_AHCI_QCOM) += ahci_qcom.o libahci.o libahci_platform.o
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# SFF w/ custom DMA
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obj-$(CONFIG_PDC_ADMA) += pdc_adma.o
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--- /dev/null
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+++ b/drivers/ata/ahci_qcom.c
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@@ -0,0 +1,86 @@
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+/*
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+ * Qualcomm ARM SoC AHCI SATA platform driver
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+ *
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+ * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
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+ *
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+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 and
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+ * only version 2 as published by the Free Software Foundation.
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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/kernel.h>
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+#include <linux/module.h>
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+#include <linux/pm.h>
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+#include <linux/device.h>
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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 "ahci.h"
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+
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+static const struct ata_port_info qcom_ahci_port_info = {
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+ .flags = AHCI_FLAG_COMMON,
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+ .pio_mask = ATA_PIO4,
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+ .udma_mask = ATA_UDMA6,
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+ .port_ops = &ahci_platform_ops,
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+};
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+
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+static int qcom_ahci_probe(struct platform_device *pdev)
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+{
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+ struct ahci_host_priv *hpriv;
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+ struct clk *rxoob_clk;
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+ int rc;
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+
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+ hpriv = ahci_platform_get_resources(pdev);
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+ if (IS_ERR(hpriv))
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+ return PTR_ERR(hpriv);
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+
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+ /* Try and set the rxoob clk to 100Mhz */
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+ rxoob_clk = of_clk_get_by_name(pdev->dev.of_node, "rxoob");
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+ if (IS_ERR(rxoob_clk))
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+ return PTR_ERR(rxoob_clk);
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+
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+ rc = clk_set_rate(rxoob_clk, 100000000);
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+ if (rc)
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+ return rc;
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+
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+ rc = ahci_platform_enable_resources(hpriv);
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+ if (rc)
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+ return rc;
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+
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+ rc = ahci_platform_init_host(pdev, hpriv, &qcom_ahci_port_info, 0, 0);
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+ if (rc)
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+ goto disable_resources;
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+
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+ return 0;
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+disable_resources:
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+ ahci_platform_disable_resources(hpriv);
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+ return rc;
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+}
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+
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+static const struct of_device_id qcom_ahci_of_match[] = {
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+ { .compatible = "qcom,msm-ahci", },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, qcom_ahci_of_match);
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+
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+static struct platform_driver qcom_ahci_driver = {
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+ .probe = qcom_ahci_probe,
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+ .remove = ata_platform_remove_one,
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+ .driver = {
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+ .name = "qcom_ahci_qcom",
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+ .owner = THIS_MODULE,
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+ .of_match_table = qcom_ahci_of_match,
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+ },
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+};
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+module_platform_driver(qcom_ahci_driver);
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+
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+MODULE_DESCRIPTION("Qualcomm AHCI SATA platform driver");
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+MODULE_LICENSE("GPL v2");
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+MODULE_ALIAS("ahci:qcom");
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