target/linux/lantiq/patches-3.7/0006-MIPS-lantiq-adds-GPHY-firmware-loader.patch

   1 From 0224cde212df4abf251f89c3724a800b1949a774 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Mon, 22 Oct 2012 07:52:50 +0200
   4 Subject: [PATCH 6/6] MIPS: lantiq: adds GPHY firmware loader
   5
   6 The internal GPHYs need a firmware blob to function properly. This patch adds
   7 the code needed to request the blob and load it to the PHY.
   8
   9 Signed-off-by: John Crispin <blogic@openwrt.org>
  10 Patchwork: http://patchwork.linux-mips.org/patch/4523
  11 ---
  12  arch/mips/lantiq/Kconfig              |    4 ++
  13  arch/mips/lantiq/xway/Makefile        |    2 +
  14  arch/mips/lantiq/xway/xrx200_phy_fw.c |   97 +++++++++++++++++++++++++++++++++
  15  3 files changed, 103 insertions(+)
  16  create mode 100644 arch/mips/lantiq/xway/xrx200_phy_fw.c
  17
  18 diff --git a/arch/mips/lantiq/Kconfig b/arch/mips/lantiq/Kconfig
  19 index d84f361..c002191 100644
  20 --- a/arch/mips/lantiq/Kconfig
  21 +++ b/arch/mips/lantiq/Kconfig
  22 @@ -36,4 +36,8 @@ config PCI_LANTIQ
  23         bool "PCI Support"
  24         depends on SOC_XWAY && PCI
  25
  26 +config XRX200_PHY_FW
  27 +       bool "XRX200 PHY firmware loader"
  28 +       depends on SOC_XWAY
  29 +
  30  endif
  31 diff --git a/arch/mips/lantiq/xway/Makefile b/arch/mips/lantiq/xway/Makefile
  32 index 70a58c7..7a13660 100644
  33 --- a/arch/mips/lantiq/xway/Makefile
  34 +++ b/arch/mips/lantiq/xway/Makefile
  35 @@ -1 +1,3 @@
  36  obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o
  37 +
  38 +obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
  39 diff --git a/arch/mips/lantiq/xway/xrx200_phy_fw.c b/arch/mips/lantiq/xway/xrx200_phy_fw.c
  40 new file mode 100644
  41 index 0000000..fe808bf
  42 --- /dev/null
  43 +++ b/arch/mips/lantiq/xway/xrx200_phy_fw.c
  44 @@ -0,0 +1,97 @@
  45 +/*
  46 + *  This program is free software; you can redistribute it and/or modify it
  47 + *  under the terms of the GNU General Public License version 2 as published
  48 + *  by the Free Software Foundation.
  49 + *
  50 + *  Copyright (C) 2012 John Crispin <blogic@openwrt.org>
  51 + */
  52 +
  53 +#include <linux/delay.h>
  54 +#include <linux/dma-mapping.h>
  55 +#include <linux/module.h>
  56 +#include <linux/firmware.h>
  57 +#include <linux/of_platform.h>
  58 +
  59 +#include <lantiq_soc.h>
  60 +
  61 +#define XRX200_GPHY_FW_ALIGN   (16 * 1024)
  62 +
  63 +static dma_addr_t xway_gphy_load(struct platform_device *pdev)
  64 +{
  65 +       const struct firmware *fw;
  66 +       dma_addr_t dev_addr = 0;
  67 +       const char *fw_name;
  68 +       void *fw_addr;
  69 +       size_t size;
  70 +
  71 +       if (of_property_read_string(pdev->dev.of_node, "firmware", &fw_name)) {
  72 +               dev_err(&pdev->dev, "failed to load firmware filename\n");
  73 +               return 0;
  74 +       }
  75 +
  76 +       dev_info(&pdev->dev, "requesting %s\n", fw_name);
  77 +       if (request_firmware(&fw, fw_name, &pdev->dev)) {
  78 +               dev_err(&pdev->dev, "failed to load firmware: %s\n", fw_name);
  79 +               return 0;
  80 +       }
  81 +
  82 +       /*
  83 +        * GPHY cores need the firmware code in a persistent and contiguous
  84 +        * memory area with a 16 kB boundary aligned start address
  85 +        */
  86 +       size = fw->size + XRX200_GPHY_FW_ALIGN;
  87 +
  88 +       fw_addr = dma_alloc_coherent(&pdev->dev, size, &dev_addr, GFP_KERNEL);
  89 +       if (fw_addr) {
  90 +               fw_addr = PTR_ALIGN(fw_addr, XRX200_GPHY_FW_ALIGN);
  91 +               dev_addr = ALIGN(dev_addr, XRX200_GPHY_FW_ALIGN);
  92 +               memcpy(fw_addr, fw->data, fw->size);
  93 +       } else {
  94 +               dev_err(&pdev->dev, "failed to alloc firmware memory\n");
  95 +       }
  96 +
  97 +       release_firmware(fw);
  98 +       return dev_addr;
  99 +}
 100 +
 101 +static int __devinit xway_phy_fw_probe(struct platform_device *pdev)
 102 +{
 103 +       dma_addr_t fw_addr;
 104 +       struct property *pp;
 105 +       unsigned char *phyids;
 106 +       int i, ret = 0;
 107 +
 108 +       fw_addr = xway_gphy_load(pdev);
 109 +       if (!fw_addr)
 110 +               return -EINVAL;
 111 +       pp = of_find_property(pdev->dev.of_node, "phys", NULL);
 112 +       if (!pp)
 113 +               return -ENOENT;
 114 +       phyids = pp->value;
 115 +       for (i = 0; i < pp->length && !ret; i++)
 116 +               ret = xrx200_gphy_boot(&pdev->dev, phyids[i], fw_addr);
 117 +       if (!ret)
 118 +               mdelay(100);
 119 +       return ret;
 120 +}
 121 +
 122 +static const struct of_device_id xway_phy_match[] = {
 123 +       { .compatible = "lantiq,phy-xrx200" },
 124 +       {},
 125 +};
 126 +MODULE_DEVICE_TABLE(of, xway_phy_match);
 127 +
 128 +static struct platform_driver xway_phy_driver = {
 129 +       .probe = xway_phy_fw_probe,
 130 +       .driver = {
 131 +               .name = "phy-xrx200",
 132 +               .owner = THIS_MODULE,
 133 +               .of_match_table = xway_phy_match,
 134 +       },
 135 +};
 136 +
 137 +module_platform_driver(xway_phy_driver);
 138 +
 139 +MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
 140 +MODULE_DESCRIPTION("Lantiq XRX200 PHY Firmware Loader");
 141 +MODULE_LICENSE("GPL");
 142 --
 143 1.7.10.4
 144