target/linux/ipq806x/patches/0142-ata-Add-Qualcomm-ARM-SoC-AHCI-SATA-host-controller-d.patch

   1 From c5ea64dcf7b5d45e402e78b9f291d521669b7b80 Mon Sep 17 00:00:00 2001
   2 From: Kumar Gala <galak@codeaurora.org>
   3 Date: Fri, 30 May 2014 15:35:40 -0500
   4 Subject: [PATCH 142/182] ata: Add Qualcomm ARM SoC AHCI SATA host controller
   5  driver
   6
   7 Add support for the Qualcomm AHCI SATA controller that exists on several
   8 SoC and specifically the IPQ806x family of chips.  The IPQ806x SATA support
   9 requires the associated IPQ806x SATA PHY Driver to be enabled as well.
  10
  11 Signed-off-by: Kumar Gala <galak@codeaurora.org>
  12 ---
  13  drivers/ata/Kconfig     |   10 ++++++
  14  drivers/ata/Makefile    |    1 +
  15  drivers/ata/ahci_qcom.c |   86 +++++++++++++++++++++++++++++++++++++++++++++++
  16  3 files changed, 97 insertions(+)
  17  create mode 100644 drivers/ata/ahci_qcom.c
  18
  19 --- a/drivers/ata/Kconfig
  20 +++ b/drivers/ata/Kconfig
  21 @@ -122,6 +122,16 @@ config AHCI_IMX
  22
  23           If unsure, say N.
  24
  25 +config AHCI_QCOM
  26 +       tristate "Qualcomm AHCI SATA support"
  27 +       depends on ARCH_QCOM
  28 +       help
  29 +         This option enables support for AHCI SATA controller
  30 +         integrated into Qualcomm ARM SoC chipsets. For more
  31 +         information please refer to http://www.qualcomm.com/chipsets.
  32 +
  33 +         If unsure, say N.
  34 +
  35  config SATA_FSL
  36         tristate "Freescale 3.0Gbps SATA support"
  37         depends on FSL_SOC
  38 --- a/drivers/ata/Makefile
  39 +++ b/drivers/ata/Makefile
  40 @@ -11,6 +11,7 @@ obj-$(CONFIG_SATA_SIL24)      += sata_sil24.o
  41  obj-$(CONFIG_SATA_DWC)         += sata_dwc_460ex.o
  42  obj-$(CONFIG_SATA_HIGHBANK)    += sata_highbank.o libahci.o
  43  obj-$(CONFIG_AHCI_IMX)         += ahci_imx.o libahci.o libahci_platform.o
  44 +obj-$(CONFIG_AHCI_QCOM)                += ahci_qcom.o libahci.o libahci_platform.o
  45
  46  # SFF w/ custom DMA
  47  obj-$(CONFIG_PDC_ADMA)         += pdc_adma.o
  48 --- /dev/null
  49 +++ b/drivers/ata/ahci_qcom.c
  50 @@ -0,0 +1,86 @@
  51 +/*
  52 + * Qualcomm ARM SoC AHCI SATA platform driver
  53 + *
  54 + * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
  55 + *
  56 + * Copyright (c) 2014, The Linux Foundation. All rights reserved.
  57 + *
  58 + * This program is free software; you can redistribute it and/or modify
  59 + * it under the terms of the GNU General Public License version 2 and
  60 + * only version 2 as published by the Free Software Foundation.
  61 + *
  62 + * This program is distributed in the hope that it will be useful,
  63 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  64 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  65 + * GNU General Public License for more details.
  66 + */
  67 +
  68 +#include <linux/kernel.h>
  69 +#include <linux/module.h>
  70 +#include <linux/pm.h>
  71 +#include <linux/device.h>
  72 +#include <linux/platform_device.h>
  73 +#include <linux/libata.h>
  74 +#include <linux/ahci_platform.h>
  75 +#include "ahci.h"
  76 +
  77 +static const struct ata_port_info qcom_ahci_port_info = {
  78 +       .flags          = AHCI_FLAG_COMMON,
  79 +       .pio_mask       = ATA_PIO4,
  80 +       .udma_mask      = ATA_UDMA6,
  81 +       .port_ops       = &ahci_platform_ops,
  82 +};
  83 +
  84 +static int qcom_ahci_probe(struct platform_device *pdev)
  85 +{
  86 +       struct ahci_host_priv *hpriv;
  87 +       struct clk *rxoob_clk;
  88 +       int rc;
  89 +
  90 +       hpriv = ahci_platform_get_resources(pdev);
  91 +       if (IS_ERR(hpriv))
  92 +               return PTR_ERR(hpriv);
  93 +
  94 +       /* Try and set the rxoob clk to 100Mhz */
  95 +       rxoob_clk = of_clk_get_by_name(pdev->dev.of_node, "rxoob");
  96 +       if (IS_ERR(rxoob_clk))
  97 +               return PTR_ERR(rxoob_clk);
  98 +
  99 +       rc = clk_set_rate(rxoob_clk, 100000000);
 100 +       if (rc)
 101 +               return rc;
 102 +
 103 +       rc = ahci_platform_enable_resources(hpriv);
 104 +       if (rc)
 105 +               return rc;
 106 +
 107 +       rc = ahci_platform_init_host(pdev, hpriv, &qcom_ahci_port_info, 0, 0);
 108 +       if (rc)
 109 +               goto disable_resources;
 110 +
 111 +       return 0;
 112 +disable_resources:
 113 +       ahci_platform_disable_resources(hpriv);
 114 +       return rc;
 115 +}
 116 +
 117 +static const struct of_device_id qcom_ahci_of_match[] = {
 118 +       { .compatible = "qcom,msm-ahci", },
 119 +       {},
 120 +};
 121 +MODULE_DEVICE_TABLE(of, qcom_ahci_of_match);
 122 +
 123 +static struct platform_driver qcom_ahci_driver = {
 124 +       .probe = qcom_ahci_probe,
 125 +       .remove = ata_platform_remove_one,
 126 +       .driver = {
 127 +               .name = "qcom_ahci_qcom",
 128 +               .owner = THIS_MODULE,
 129 +               .of_match_table = qcom_ahci_of_match,
 130 +       },
 131 +};
 132 +module_platform_driver(qcom_ahci_driver);
 133 +
 134 +MODULE_DESCRIPTION("Qualcomm AHCI SATA platform driver");
 135 +MODULE_LICENSE("GPL v2");
 136 +MODULE_ALIAS("ahci:qcom");