| Richard Röjfors | 7716693 | 2009-11-13 12:29:00 +0100 | [diff] [blame] | 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 <info@mocean-labs.com>"); |
| 101 | MODULE_DESCRIPTION("Xilinx SPI platform driver"); |
| 102 | MODULE_LICENSE("GPL v2"); |