projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 77166934 RR |
1 | /* |
| 2 | * Support for Xilinx SPI platform devices | |
| 3 | * Copyright (c) 2009 Intel Corporation | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License version 2 as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program; if not, write to the Free Software | |
| 16 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 17 | */ | |
| 18 | ||
| 19 | /* Supports: | |
| 20 | * Xilinx SPI devices as platform devices | |
| 21 | * | |
| 22 | * Inspired by xilinx_spi.c, 2002-2007 (c) MontaVista Software, Inc. | |
| 23 | */ | |
| 24 | ||
| 25 | #include <linux/module.h> | |
| 26 | #include <linux/init.h> | |
| 27 | #include <linux/interrupt.h> | |
| 28 | #include <linux/io.h> | |
| 29 | #include <linux/platform_device.h> | |
| 30 | ||
| 31 | #include <linux/spi/spi.h> | |
| 32 | #include <linux/spi/spi_bitbang.h> | |
| 33 | #include <linux/spi/xilinx_spi.h> | |
| 34 | ||
| 35 | #include "xilinx_spi.h" | |
| 36 | ||
| 37 | static int __devinit xilinx_spi_probe(struct platform_device *dev) | |
| 38 | { | |
| 39 | struct xspi_platform_data *pdata; | |
| 40 | struct resource *r; | |
| 41 | int irq; | |
| 42 | struct spi_master *master; | |
| 43 | u8 i; | |
| 44 | ||
| 45 | pdata = dev->dev.platform_data; | |
| 46 | if (!pdata) | |
| 47 | return -ENODEV; | |
| 48 | ||
| 49 | r = platform_get_resource(dev, IORESOURCE_MEM, 0); | |
| 50 | if (!r) | |
| 51 | return -ENODEV; | |
| 52 | ||
| 53 | irq = platform_get_irq(dev, 0); | |
| 54 | if (irq < 0) | |
| 55 | return -ENXIO; | |
| 56 | ||
| 57 | master = xilinx_spi_init(&dev->dev, r, irq, dev->id); | |
| 58 | if (!master) | |
| 59 | return -ENODEV; | |
| 60 | ||
| 61 | for (i = 0; i < pdata->num_devices; i++) | |
| 62 | spi_new_device(master, pdata->devices + i); | |
| 63 | ||
| 64 | platform_set_drvdata(dev, master); | |
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | static int __devexit xilinx_spi_remove(struct platform_device *dev) | |
| 69 | { | |
| 70 | xilinx_spi_deinit(platform_get_drvdata(dev)); | |
| 71 | platform_set_drvdata(dev, 0); | |
| 72 | ||
| 73 | return 0; | |
| 74 | } | |
| 75 | ||
| 76 | /* work with hotplug and coldplug */ | |
| 77 | MODULE_ALIAS("platform:" XILINX_SPI_NAME); | |
| 78 | ||
| 79 | static struct platform_driver xilinx_spi_driver = { | |
| 80 | .probe = xilinx_spi_probe, | |
| 81 | .remove = __devexit_p(xilinx_spi_remove), | |
| 82 | .driver = { | |
| 83 | .name = XILINX_SPI_NAME, | |
| 84 | .owner = THIS_MODULE, | |
| 85 | }, | |
| 86 | }; | |
| 87 | ||
| 88 | static int __init xilinx_spi_pltfm_init(void) | |
| 89 | { | |
| 90 | return platform_driver_register(&xilinx_spi_driver); | |
| 91 | } | |
| 92 | module_init(xilinx_spi_pltfm_init); | |
| 93 | ||
| 94 | static void __exit xilinx_spi_pltfm_exit(void) | |
| 95 | { | |
| 96 | platform_driver_unregister(&xilinx_spi_driver); | |
| 97 | } | |
| 98 | module_exit(xilinx_spi_pltfm_exit); | |
| 99 | ||
| 100 | MODULE_AUTHOR("Mocean Laboratories <[email protected]>"); | |
| 101 | MODULE_DESCRIPTION("Xilinx SPI platform driver"); | |
| 102 | MODULE_LICENSE("GPL v2"); |