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