H Hartley Sweeten | 309231d | 2013-01-30 15:22:44 -0700 | [diff] [blame] | 1 | /* |
| 2 | * comedi_pcmcia.c |
| 3 | * Comedi PCMCIA driver specific functions. |
| 4 | * |
| 5 | * COMEDI - Linux Control and Measurement Device Interface |
| 6 | * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
H Hartley Sweeten | 309231d | 2013-01-30 15:22:44 -0700 | [diff] [blame] | 17 | */ |
| 18 | |
Ian Abbott | aae434b | 2014-10-31 17:47:37 +0000 | [diff] [blame] | 19 | #include <linux/module.h> |
H Hartley Sweeten | 309231d | 2013-01-30 15:22:44 -0700 | [diff] [blame] | 20 | #include <linux/kernel.h> |
| 21 | |
Ian Abbott | a1d49ae | 2015-01-30 09:57:18 +0000 | [diff] [blame] | 22 | #include "comedi_pcmcia.h" |
H Hartley Sweeten | 309231d | 2013-01-30 15:22:44 -0700 | [diff] [blame] | 23 | |
| 24 | /** |
H Hartley Sweeten | 1f021e1f | 2013-01-30 15:23:06 -0700 | [diff] [blame] | 25 | * comedi_to_pcmcia_dev() - comedi_device pointer to pcmcia_device pointer. |
| 26 | * @dev: comedi_device struct |
| 27 | */ |
| 28 | struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *dev) |
| 29 | { |
| 30 | return dev->hw_dev ? to_pcmcia_dev(dev->hw_dev) : NULL; |
| 31 | } |
| 32 | EXPORT_SYMBOL_GPL(comedi_to_pcmcia_dev); |
| 33 | |
H Hartley Sweeten | ddb2d0a | 2013-02-04 14:19:35 -0700 | [diff] [blame] | 34 | static int comedi_pcmcia_conf_check(struct pcmcia_device *link, |
| 35 | void *priv_data) |
| 36 | { |
| 37 | if (link->config_index == 0) |
| 38 | return -EINVAL; |
| 39 | |
| 40 | return pcmcia_request_io(link); |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * comedi_pcmcia_enable() - Request the regions and enable the PCMCIA device. |
| 45 | * @dev: comedi_device struct |
H Hartley Sweeten | a3ac951 | 2013-02-05 18:16:07 -0700 | [diff] [blame] | 46 | * @conf_check: optional callback to check the pcmcia_device configuration |
H Hartley Sweeten | ddb2d0a | 2013-02-04 14:19:35 -0700 | [diff] [blame] | 47 | * |
| 48 | * The comedi PCMCIA driver needs to set the link->config_flags, as |
| 49 | * appropriate for that driver, before calling this function in order |
| 50 | * to allow pcmcia_loop_config() to do its internal autoconfiguration. |
| 51 | */ |
H Hartley Sweeten | a3ac951 | 2013-02-05 18:16:07 -0700 | [diff] [blame] | 52 | int comedi_pcmcia_enable(struct comedi_device *dev, |
| 53 | int (*conf_check)(struct pcmcia_device *, void *)) |
H Hartley Sweeten | ddb2d0a | 2013-02-04 14:19:35 -0700 | [diff] [blame] | 54 | { |
| 55 | struct pcmcia_device *link = comedi_to_pcmcia_dev(dev); |
| 56 | int ret; |
| 57 | |
| 58 | if (!link) |
| 59 | return -ENODEV; |
| 60 | |
H Hartley Sweeten | a3ac951 | 2013-02-05 18:16:07 -0700 | [diff] [blame] | 61 | if (!conf_check) |
| 62 | conf_check = comedi_pcmcia_conf_check; |
| 63 | |
| 64 | ret = pcmcia_loop_config(link, conf_check, NULL); |
H Hartley Sweeten | ddb2d0a | 2013-02-04 14:19:35 -0700 | [diff] [blame] | 65 | if (ret) |
| 66 | return ret; |
| 67 | |
| 68 | return pcmcia_enable_device(link); |
| 69 | } |
| 70 | EXPORT_SYMBOL_GPL(comedi_pcmcia_enable); |
| 71 | |
| 72 | /** |
| 73 | * comedi_pcmcia_disable() - Disable the PCMCIA device and release the regions. |
| 74 | * @dev: comedi_device struct |
| 75 | */ |
| 76 | void comedi_pcmcia_disable(struct comedi_device *dev) |
| 77 | { |
| 78 | struct pcmcia_device *link = comedi_to_pcmcia_dev(dev); |
| 79 | |
| 80 | if (link) |
| 81 | pcmcia_disable_device(link); |
| 82 | } |
| 83 | EXPORT_SYMBOL_GPL(comedi_pcmcia_disable); |
| 84 | |
H Hartley Sweeten | 1f021e1f | 2013-01-30 15:23:06 -0700 | [diff] [blame] | 85 | /** |
| 86 | * comedi_pcmcia_auto_config() - Configure/probe a comedi PCMCIA driver. |
| 87 | * @link: pcmcia_device struct |
| 88 | * @driver: comedi_driver struct |
| 89 | * |
| 90 | * Typically called from the pcmcia_driver (*probe) function. |
| 91 | */ |
| 92 | int comedi_pcmcia_auto_config(struct pcmcia_device *link, |
| 93 | struct comedi_driver *driver) |
| 94 | { |
| 95 | return comedi_auto_config(&link->dev, driver, 0); |
| 96 | } |
| 97 | EXPORT_SYMBOL_GPL(comedi_pcmcia_auto_config); |
| 98 | |
| 99 | /** |
| 100 | * comedi_pcmcia_auto_unconfig() - Unconfigure/remove a comedi PCMCIA driver. |
| 101 | * @link: pcmcia_device struct |
| 102 | * |
| 103 | * Typically called from the pcmcia_driver (*remove) function. |
| 104 | */ |
| 105 | void comedi_pcmcia_auto_unconfig(struct pcmcia_device *link) |
| 106 | { |
| 107 | comedi_auto_unconfig(&link->dev); |
| 108 | } |
| 109 | EXPORT_SYMBOL_GPL(comedi_pcmcia_auto_unconfig); |
| 110 | |
| 111 | /** |
H Hartley Sweeten | 309231d | 2013-01-30 15:22:44 -0700 | [diff] [blame] | 112 | * comedi_pcmcia_driver_register() - Register a comedi PCMCIA driver. |
| 113 | * @comedi_driver: comedi_driver struct |
| 114 | * @pcmcia_driver: pcmcia_driver struct |
| 115 | * |
| 116 | * This function is used for the module_init() of comedi USB drivers. |
| 117 | * Do not call it directly, use the module_comedi_pcmcia_driver() helper |
| 118 | * macro instead. |
| 119 | */ |
| 120 | int comedi_pcmcia_driver_register(struct comedi_driver *comedi_driver, |
| 121 | struct pcmcia_driver *pcmcia_driver) |
| 122 | { |
| 123 | int ret; |
| 124 | |
| 125 | ret = comedi_driver_register(comedi_driver); |
| 126 | if (ret < 0) |
| 127 | return ret; |
| 128 | |
| 129 | ret = pcmcia_register_driver(pcmcia_driver); |
| 130 | if (ret < 0) { |
| 131 | comedi_driver_unregister(comedi_driver); |
| 132 | return ret; |
| 133 | } |
| 134 | |
| 135 | return 0; |
| 136 | } |
| 137 | EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_register); |
| 138 | |
| 139 | /** |
| 140 | * comedi_pcmcia_driver_unregister() - Unregister a comedi PCMCIA driver. |
| 141 | * @comedi_driver: comedi_driver struct |
| 142 | * @pcmcia_driver: pcmcia_driver struct |
| 143 | * |
| 144 | * This function is used for the module_exit() of comedi PCMCIA drivers. |
| 145 | * Do not call it directly, use the module_comedi_pcmcia_driver() helper |
| 146 | * macro instead. |
| 147 | */ |
| 148 | void comedi_pcmcia_driver_unregister(struct comedi_driver *comedi_driver, |
| 149 | struct pcmcia_driver *pcmcia_driver) |
| 150 | { |
| 151 | pcmcia_unregister_driver(pcmcia_driver); |
| 152 | comedi_driver_unregister(comedi_driver); |
| 153 | } |
| 154 | EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_unregister); |
Ian Abbott | aae434b | 2014-10-31 17:47:37 +0000 | [diff] [blame] | 155 | |
| 156 | static int __init comedi_pcmcia_init(void) |
| 157 | { |
| 158 | return 0; |
| 159 | } |
| 160 | module_init(comedi_pcmcia_init); |
| 161 | |
| 162 | static void __exit comedi_pcmcia_exit(void) |
| 163 | { |
| 164 | } |
| 165 | module_exit(comedi_pcmcia_exit); |
| 166 | |
| 167 | MODULE_AUTHOR("http://www.comedi.org"); |
| 168 | MODULE_DESCRIPTION("Comedi PCMCIA interface module"); |
| 169 | MODULE_LICENSE("GPL"); |