/* * 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 <john@phrozen.org> */ #include <linux/export.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; 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(&pdev->dev, CP1_SIZE, &dma, GFP_KERNEL)); 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-xway" }, {}, }; static struct platform_driver vmmc_driver = { .probe = vmmc_probe, .driver = { .name = "lantiq,vmmc", .of_match_table = vmmc_match, }, }; builtin_platform_driver(vmmc_driver);