John Crispin | 05637f1 | 2013-03-13 10:04:01 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify it |
| 3 | * under the terms of the GNU General Public License version 2 as published |
| 4 | * by the Free Software Foundation. |
| 5 | * |
John Crispin | 97b9210 | 2016-05-05 09:57:56 +0200 | [diff] [blame] | 6 | * Copyright (C) 2012 John Crispin <john@phrozen.org> |
John Crispin | 05637f1 | 2013-03-13 10:04:01 +0100 | [diff] [blame] | 7 | */ |
| 8 | |
Paul Gortmaker | 0008ef9 | 2016-08-15 16:30:54 -0400 | [diff] [blame] | 9 | #include <linux/export.h> |
John Crispin | 05637f1 | 2013-03-13 10:04:01 +0100 | [diff] [blame] | 10 | #include <linux/of_platform.h> |
| 11 | #include <linux/of_gpio.h> |
| 12 | #include <linux/dma-mapping.h> |
| 13 | |
| 14 | #include <lantiq_soc.h> |
| 15 | |
| 16 | static unsigned int *cp1_base; |
| 17 | |
| 18 | unsigned int *ltq_get_cp1_base(void) |
| 19 | { |
| 20 | if (!cp1_base) |
| 21 | panic("no cp1 base was set\n"); |
| 22 | |
| 23 | return cp1_base; |
| 24 | } |
| 25 | EXPORT_SYMBOL(ltq_get_cp1_base); |
| 26 | |
| 27 | static int vmmc_probe(struct platform_device *pdev) |
| 28 | { |
| 29 | #define CP1_SIZE (1 << 20) |
| 30 | int gpio_count; |
| 31 | dma_addr_t dma; |
| 32 | |
| 33 | cp1_base = |
| 34 | (void *) CPHYSADDR(dma_alloc_coherent(NULL, CP1_SIZE, |
| 35 | &dma, GFP_ATOMIC)); |
| 36 | |
| 37 | gpio_count = of_gpio_count(pdev->dev.of_node); |
| 38 | while (gpio_count > 0) { |
| 39 | enum of_gpio_flags flags; |
| 40 | int gpio = of_get_gpio_flags(pdev->dev.of_node, |
| 41 | --gpio_count, &flags); |
| 42 | if (gpio_request(gpio, "vmmc-relay")) |
| 43 | continue; |
| 44 | dev_info(&pdev->dev, "requested GPIO %d\n", gpio); |
| 45 | gpio_direction_output(gpio, |
| 46 | (flags & OF_GPIO_ACTIVE_LOW) ? (0) : (1)); |
| 47 | } |
| 48 | |
| 49 | dev_info(&pdev->dev, "reserved %dMB at 0x%p", CP1_SIZE >> 20, cp1_base); |
| 50 | |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | static const struct of_device_id vmmc_match[] = { |
| 55 | { .compatible = "lantiq,vmmc-xway" }, |
| 56 | {}, |
| 57 | }; |
John Crispin | 05637f1 | 2013-03-13 10:04:01 +0100 | [diff] [blame] | 58 | |
| 59 | static struct platform_driver vmmc_driver = { |
| 60 | .probe = vmmc_probe, |
| 61 | .driver = { |
| 62 | .name = "lantiq,vmmc", |
John Crispin | 05637f1 | 2013-03-13 10:04:01 +0100 | [diff] [blame] | 63 | .of_match_table = vmmc_match, |
| 64 | }, |
| 65 | }; |
Paul Gortmaker | 0008ef9 | 2016-08-15 16:30:54 -0400 | [diff] [blame] | 66 | builtin_platform_driver(vmmc_driver); |