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