target/linux/lantiq/patches-3.9/0019-owrt-lantiq-handle-vmmc-memory-reservation.patch

   1 From 12ec61455ea440c164c3ff777adbedea350b1e08 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Wed, 13 Mar 2013 10:04:01 +0100
   4 Subject: [PATCH 19/22] owrt: lantiq: handle vmmc memory reservation
   5
   6 ---
   7  arch/mips/lantiq/xway/Makefile |    2 +-
   8  arch/mips/lantiq/xway/vmmc.c   |   63 ++++++++++++++++++++++++++++++++++++++++
   9  2 files changed, 64 insertions(+), 1 deletion(-)
  10  create mode 100644 arch/mips/lantiq/xway/vmmc.c
  11
  12 diff --git a/arch/mips/lantiq/xway/Makefile b/arch/mips/lantiq/xway/Makefile
  13 index 51f0eba..3a01d22 100644
  14 --- a/arch/mips/lantiq/xway/Makefile
  15 +++ b/arch/mips/lantiq/xway/Makefile
  16 @@ -1,6 +1,6 @@
  17  obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o dcdc.o
  18
  19 -obj-y += eth_mac.o
  20 +obj-y += eth_mac.o vmmc.o
  21  obj-$(CONFIG_PCI) += ath_eep.o rt_eep.o pci-ath-fixup.o
  22
  23  obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
  24 diff --git a/arch/mips/lantiq/xway/vmmc.c b/arch/mips/lantiq/xway/vmmc.c
  25 new file mode 100644
  26 index 0000000..6dedf77
  27 --- /dev/null
  28 +++ b/arch/mips/lantiq/xway/vmmc.c
  29 @@ -0,0 +1,63 @@
  30 +/*
  31 + *  This program is free software; you can redistribute it and/or modify it
  32 + *  under the terms of the GNU General Public License version 2 as published
  33 + *  by the Free Software Foundation.
  34 + *
  35 + *  Copyright (C) 2012 John Crispin <blogic@openwrt.org>
  36 + */
  37 +
  38 +#include <linux/module.h>
  39 +#include <linux/of_platform.h>
  40 +#include <linux/of_gpio.h>
  41 +#include <linux/dma-mapping.h>
  42 +
  43 +#include <lantiq_soc.h>
  44 +
  45 +static unsigned int *cp1_base = 0;
  46 +unsigned int* ltq_get_cp1_base(void)
  47 +{
  48 +       if (!cp1_base)
  49 +               panic("no cp1 base was set\n");
  50 +       return cp1_base;
  51 +}
  52 +EXPORT_SYMBOL(ltq_get_cp1_base);
  53 +
  54 +static int vmmc_probe(struct platform_device *pdev)
  55 +{
  56 +#define CP1_SIZE       (1 << 20)
  57 +       int gpio_count;
  58 +       dma_addr_t dma;
  59 +       cp1_base =
  60 +               (void*)CPHYSADDR(dma_alloc_coherent(NULL, CP1_SIZE, &dma, GFP_ATOMIC));
  61 +
  62 +       gpio_count = of_gpio_count(pdev->dev.of_node);
  63 +       while (gpio_count) {
  64 +               enum of_gpio_flags flags;
  65 +               int gpio = of_get_gpio_flags(pdev->dev.of_node, --gpio_count, &flags);
  66 +               if (gpio_request(gpio, "vmmc-relay"))
  67 +                       continue;
  68 +               dev_info(&pdev->dev, "requested GPIO %d\n", gpio);
  69 +               gpio_direction_output(gpio, (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
  70 +       }
  71 +
  72 +       dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
  73 +
  74 +       return 0;
  75 +}
  76 +
  77 +static const struct of_device_id vmmc_match[] = {
  78 +       { .compatible = "lantiq,vmmc" },
  79 +       {},
  80 +};
  81 +MODULE_DEVICE_TABLE(of, vmmc_match);
  82 +
  83 +static struct platform_driver vmmc_driver = {
  84 +       .probe = vmmc_probe,
  85 +       .driver = {
  86 +               .name = "lantiq,vmmc",
  87 +               .owner = THIS_MODULE,
  88 +               .of_match_table = vmmc_match,
  89 +       },
  90 +};
  91 +
  92 +module_platform_driver(vmmc_driver);
  93 --
  94 1.7.10.4
  95