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 diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
  20 index dc950f3..da05034 100644
  21 --- a/drivers/ata/Kconfig
  22 +++ b/drivers/ata/Kconfig
  23 @@ -106,6 +106,16 @@ config AHCI_IMX
  24
  25           If unsure, say N.
  26
  27 +config AHCI_QCOM
  28 +       tristate "Qualcomm AHCI SATA support"
  29 +       depends on ARCH_QCOM
  30 +       help
  31 +         This option enables support for AHCI SATA controller
  32 +         integrated into Qualcomm ARM SoC chipsets. For more
  33 +         information please refer to http://www.qualcomm.com/chipsets.
  34 +
  35 +         If unsure, say N.
  36 +
  37  config SATA_FSL
  38         tristate "Freescale 3.0Gbps SATA support"
  39         depends on FSL_SOC
  40 diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
  41 index 366b743..e08044f 100644
  42 --- a/drivers/ata/Makefile
  43 +++ b/drivers/ata/Makefile
  44 @@ -11,6 +11,7 @@ obj-$(CONFIG_SATA_SIL24)      += sata_sil24.o
  45  obj-$(CONFIG_SATA_DWC)         += sata_dwc_460ex.o
  46  obj-$(CONFIG_SATA_HIGHBANK)    += sata_highbank.o libahci.o
  47  obj-$(CONFIG_AHCI_IMX)         += ahci_imx.o libahci.o libahci_platform.o
  48 +obj-$(CONFIG_AHCI_QCOM)                += ahci_qcom.o libahci.o libahci_platform.o
  49
  50  # SFF w/ custom DMA
  51  obj-$(CONFIG_PDC_ADMA)         += pdc_adma.o
  52 diff --git a/drivers/ata/ahci_qcom.c b/drivers/ata/ahci_qcom.c
  53 new file mode 100644
  54 index 0000000..bfb7a77
  55 --- /dev/null
  56 +++ b/drivers/ata/ahci_qcom.c
  57 @@ -0,0 +1,86 @@
  58 +/*
  59 + * Qualcomm ARM SoC AHCI SATA platform driver
  60 + *
  61 + * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov
  62 + *
  63 + * Copyright (c) 2014, The Linux Foundation. All rights reserved.
  64 + *
  65 + * This program is free software; you can redistribute it and/or modify
  66 + * it under the terms of the GNU General Public License version 2 and
  67 + * only version 2 as published by the Free Software Foundation.
  68 + *
  69 + * This program is distributed in the hope that it will be useful,
  70 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  71 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  72 + * GNU General Public License for more details.
  73 + */
  74 +
  75 +#include <linux/kernel.h>
  76 +#include <linux/module.h>
  77 +#include <linux/pm.h>
  78 +#include <linux/device.h>
  79 +#include <linux/platform_device.h>
  80 +#include <linux/libata.h>
  81 +#include <linux/ahci_platform.h>
  82 +#include "ahci.h"
  83 +
  84 +static const struct ata_port_info qcom_ahci_port_info = {
  85 +       .flags          = AHCI_FLAG_COMMON,
  86 +       .pio_mask       = ATA_PIO4,
  87 +       .udma_mask      = ATA_UDMA6,
  88 +       .port_ops       = &ahci_platform_ops,
  89 +};
  90 +
  91 +static int qcom_ahci_probe(struct platform_device *pdev)
  92 +{
  93 +       struct ahci_host_priv *hpriv;
  94 +       struct clk *rxoob_clk;
  95 +       int rc;
  96 +
  97 +       hpriv = ahci_platform_get_resources(pdev);
  98 +       if (IS_ERR(hpriv))
  99 +               return PTR_ERR(hpriv);
 100 +
 101 +       /* Try and set the rxoob clk to 100Mhz */
 102 +       rxoob_clk = of_clk_get_by_name(pdev->dev.of_node, "rxoob");
 103 +       if (IS_ERR(rxoob_clk))
 104 +               return PTR_ERR(rxoob_clk);
 105 +
 106 +       rc = clk_set_rate(rxoob_clk, 100000000);
 107 +       if (rc)
 108 +               return rc;
 109 +
 110 +       rc = ahci_platform_enable_resources(hpriv);
 111 +       if (rc)
 112 +               return rc;
 113 +
 114 +       rc = ahci_platform_init_host(pdev, hpriv, &qcom_ahci_port_info, 0, 0);
 115 +       if (rc)
 116 +               goto disable_resources;
 117 +
 118 +       return 0;
 119 +disable_resources:
 120 +       ahci_platform_disable_resources(hpriv);
 121 +       return rc;
 122 +}
 123 +
 124 +static const struct of_device_id qcom_ahci_of_match[] = {
 125 +       { .compatible = "qcom,msm-ahci", },
 126 +       {},
 127 +};
 128 +MODULE_DEVICE_TABLE(of, qcom_ahci_of_match);
 129 +
 130 +static struct platform_driver qcom_ahci_driver = {
 131 +       .probe = qcom_ahci_probe,
 132 +       .remove = ata_platform_remove_one,
 133 +       .driver = {
 134 +               .name = "qcom_ahci_qcom",
 135 +               .owner = THIS_MODULE,
 136 +               .of_match_table = qcom_ahci_of_match,
 137 +       },
 138 +};
 139 +module_platform_driver(qcom_ahci_driver);
 140 +
 141 +MODULE_DESCRIPTION("Qualcomm AHCI SATA platform driver");
 142 +MODULE_LICENSE("GPL v2");
 143 +MODULE_ALIAS("ahci:qcom");
 144 --
 145 1.7.10.4
 146