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- From 16e315864132b59749faff739230daf4cee9abbb Mon Sep 17 00:00:00 2001
- From: John Crispin <blogic@openwrt.org>
- Date: Wed, 13 Mar 2013 10:04:01 +0100
- Subject: [PATCH 03/36] MIPS: lantiq: handle vmmc memory reservation
- Signed-off-by: John Crispin <blogic@openwrt.org>
- ---
- arch/mips/lantiq/xway/Makefile | 2 ++
- arch/mips/lantiq/xway/vmmc.c | 63 ++++++++++++++++++++++++++++++++++++++++
- 2 files changed, 65 insertions(+)
- create mode 100644 arch/mips/lantiq/xway/vmmc.c
- --- a/arch/mips/lantiq/xway/Makefile
- +++ b/arch/mips/lantiq/xway/Makefile
- @@ -1,3 +1,5 @@
- obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o dcdc.o
-
- +obj-y += vmmc.o
- +
- obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
- --- /dev/null
- +++ b/arch/mips/lantiq/xway/vmmc.c
- @@ -0,0 +1,63 @@
- +/*
- + * This program is free software; you can redistribute it and/or modify it
- + * under the terms of the GNU General Public License version 2 as published
- + * by the Free Software Foundation.
- + *
- + * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
- + */
- +
- +#include <linux/module.h>
- +#include <linux/of_platform.h>
- +#include <linux/of_gpio.h>
- +#include <linux/dma-mapping.h>
- +
- +#include <lantiq_soc.h>
- +
- +static unsigned int *cp1_base = 0;
- +unsigned int* ltq_get_cp1_base(void)
- +{
- + if (!cp1_base)
- + panic("no cp1 base was set\n");
- + return cp1_base;
- +}
- +EXPORT_SYMBOL(ltq_get_cp1_base);
- +
- +static int vmmc_probe(struct platform_device *pdev)
- +{
- +#define CP1_SIZE (1 << 20)
- + int gpio_count;
- + dma_addr_t dma;
- + cp1_base =
- + (void*)CPHYSADDR(dma_alloc_coherent(NULL, CP1_SIZE, &dma, GFP_ATOMIC));
- +
- + gpio_count = of_gpio_count(pdev->dev.of_node);
- + while (gpio_count > 0) {
- + enum of_gpio_flags flags;
- + int gpio = of_get_gpio_flags(pdev->dev.of_node, --gpio_count, &flags);
- + if (gpio_request(gpio, "vmmc-relay"))
- + continue;
- + dev_info(&pdev->dev, "requested GPIO %d\n", gpio);
- + gpio_direction_output(gpio, (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1));
- + }
- +
- + dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base);
- +
- + return 0;
- +}
- +
- +static const struct of_device_id vmmc_match[] = {
- + { .compatible = "lantiq,vmmc" },
- + {},
- +};
- +MODULE_DEVICE_TABLE(of, vmmc_match);
- +
- +static struct platform_driver vmmc_driver = {
- + .probe = vmmc_probe,
- + .driver = {
- + .name = "lantiq,vmmc",
- + .owner = THIS_MODULE,
- + .of_match_table = vmmc_match,
- + },
- +};
- +
- +module_platform_driver(vmmc_driver);
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