From 16e315864132b59749faff739230daf4cee9abbb Mon Sep 17 00:00:00 2001 From: John Crispin Date: Wed, 13 Mar 2013 10:04:01 +0100 Subject: [PATCH 03/31] MIPS: lantiq: handle vmmc memory reservation Signed-off-by: John Crispin --- 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 diff --git a/arch/mips/lantiq/xway/Makefile b/arch/mips/lantiq/xway/Makefile index 087497d..a2edc53 100644 --- 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 diff --git a/arch/mips/lantiq/xway/vmmc.c b/arch/mips/lantiq/xway/vmmc.c new file mode 100644 index 0000000..cea0ff9 --- /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 + */ + +#include +#include +#include +#include + +#include + +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); -- 1.7.10.4