target/linux/lantiq/patches-3.14/0003-MIPS-lantiq-handle-vmmc-memory-reservation.patch

   1 From 16e315864132b59749faff739230daf4cee9abbb 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 03/36] MIPS: lantiq: handle vmmc memory reservation
   5
   6 Signed-off-by: John Crispin <blogic@openwrt.org>
   7 ---
   8  arch/mips/lantiq/xway/Makefile |    2 ++
   9  arch/mips/lantiq/xway/vmmc.c   |   63 ++++++++++++++++++++++++++++++++++++++++
  10  2 files changed, 65 insertions(+)
  11  create mode 100644 arch/mips/lantiq/xway/vmmc.c
  12
  13 --- a/arch/mips/lantiq/xway/Makefile
  14 +++ b/arch/mips/lantiq/xway/Makefile
  15 @@ -1,3 +1,5 @@
  16  obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o dcdc.o
  17
  18 +obj-y += vmmc.o
  19 +
  20  obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
  21 --- /dev/null
  22 +++ b/arch/mips/lantiq/xway/vmmc.c
  23 @@ -0,0 +1,63 @@
  24 +/*
  25 + *  This program is free software; you can redistribute it and/or modify it
  26 + *  under the terms of the GNU General Public License version 2 as published
  27 + *  by the Free Software Foundation.
  28 + *
  29 + *  Copyright (C) 2012 John Crispin <blogic@openwrt.org>
  30 + */
  31 +
  32 +#include <linux/module.h>
  33 +#include <linux/of_platform.h>
  34 +#include <linux/of_gpio.h>
  35 +#include <linux/dma-mapping.h>
  36 +
  37 +#include <lantiq_soc.h>
  38 +
  39 +static unsigned int *cp1_base = 0;
  40 +unsigned int* ltq_get_cp1_base(void)
  41 +{
  42 +       if (!cp1_base)
  43 +               panic("no cp1 base was set\n");
  44 +       return cp1_base;
  45 +}
  46 +EXPORT_SYMBOL(ltq_get_cp1_base);
  47 +
  48 +static int vmmc_probe(struct platform_device *pdev)
  49 +{
  50 +#define CP1_SIZE       (1 << 20)
  51 +       int gpio_count;
  52 +       dma_addr_t dma;
  53 +       cp1_base =
  54 +               (void*)CPHYSADDR(dma_alloc_coherent(NULL, CP1_SIZE, &dma, GFP_ATOMIC));
  55 +
  56 +       gpio_count = of_gpio_count(pdev->dev.of_node);
  57 +       while (gpio_count > 0) {
  58 +               enum of_gpio_flags flags;
  59 +               int gpio = of_get_gpio_flags(pdev->dev.of_node, --gpio_count, &flags);
  60 +               if (gpio_request(gpio, "vmmc-relay"))
  61 +                       continue;
  62 +               dev_info(&pdev->dev, "requested GPIO %d\n", gpio);
  63 +               gpio_direction_output(gpio, (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
  64 +       }
  65 +
  66 +       dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
  67 +
  68 +       return 0;
  69 +}
  70 +
  71 +static const struct of_device_id vmmc_match[] = {
  72 +       { .compatible = "lantiq,vmmc" },
  73 +       {},
  74 +};
  75 +MODULE_DEVICE_TABLE(of, vmmc_match);
  76 +
  77 +static struct platform_driver vmmc_driver = {
  78 +       .probe = vmmc_probe,
  79 +       .driver = {
  80 +               .name = "lantiq,vmmc",
  81 +               .owner = THIS_MODULE,
  82 +               .of_match_table = vmmc_match,
  83 +       },
  84 +};
  85 +
  86 +module_platform_driver(vmmc_driver);