f36598aeca
Patch from Richard Purdie This change makes the soc pcmcia interfaces available earlier in the boot process meaning devices like CF microdrives can be used for the root filesystem. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
130 lines
3.8 KiB
C
130 lines
3.8 KiB
C
/*======================================================================
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Device driver for the PCMCIA control functionality of StrongARM
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SA-1100 microprocessors.
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The contents of this file are subject to the Mozilla Public
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License Version 1.1 (the "License"); you may not use this file
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except in compliance with the License. You may obtain a copy of
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the License at http://www.mozilla.org/MPL/
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Software distributed under the License is distributed on an "AS
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IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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implied. See the License for the specific language governing
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rights and limitations under the License.
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The initial developer of the original code is John G. Dorsey
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<john+@cs.cmu.edu>. Portions created by John G. Dorsey are
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Copyright (C) 1999 John G. Dorsey. All Rights Reserved.
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Alternatively, the contents of this file may be used under the
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terms of the GNU Public License version 2 (the "GPL"), in which
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case the provisions of the GPL are applicable instead of the
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above. If you wish to allow the use of your version of this file
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only under the terms of the GPL and not to allow others to use
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your version of this file under the MPL, indicate your decision
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by deleting the provisions above and replace them with the notice
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and other provisions required by the GPL. If you do not delete
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the provisions above, a recipient may use your version of this
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file under either the MPL or the GPL.
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======================================================================*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/config.h>
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#include <pcmcia/cs_types.h>
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#include <pcmcia/cs.h>
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#include <pcmcia/ss.h>
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#include "sa1100_generic.h"
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static int (*sa11x0_pcmcia_hw_init[])(struct device *dev) = {
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#ifdef CONFIG_SA1100_ASSABET
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pcmcia_assabet_init,
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#endif
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#ifdef CONFIG_SA1100_CERF
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pcmcia_cerf_init,
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#endif
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#ifdef CONFIG_SA1100_H3600
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pcmcia_h3600_init,
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#endif
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#ifdef CONFIG_SA1100_SHANNON
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pcmcia_shannon_init,
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#endif
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#ifdef CONFIG_SA1100_SIMPAD
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pcmcia_simpad_init,
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#endif
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};
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static int sa11x0_drv_pcmcia_probe(struct device *dev)
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{
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int i, ret = -ENODEV;
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/*
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* Initialise any "on-board" PCMCIA sockets.
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*/
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for (i = 0; i < ARRAY_SIZE(sa11x0_pcmcia_hw_init); i++) {
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ret = sa11x0_pcmcia_hw_init[i](dev);
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if (ret == 0)
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break;
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}
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return ret;
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}
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static int sa11x0_drv_pcmcia_suspend(struct device *dev, pm_message_t state, u32 level)
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{
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int ret = 0;
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if (level == SUSPEND_SAVE_STATE)
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ret = pcmcia_socket_dev_suspend(dev, state);
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return ret;
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}
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static int sa11x0_drv_pcmcia_resume(struct device *dev, u32 level)
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{
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int ret = 0;
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if (level == RESUME_RESTORE_STATE)
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ret = pcmcia_socket_dev_resume(dev);
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return ret;
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}
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static struct device_driver sa11x0_pcmcia_driver = {
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.probe = sa11x0_drv_pcmcia_probe,
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.remove = soc_common_drv_pcmcia_remove,
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.name = "sa11x0-pcmcia",
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.bus = &platform_bus_type,
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.suspend = sa11x0_drv_pcmcia_suspend,
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.resume = sa11x0_drv_pcmcia_resume,
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};
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/* sa11x0_pcmcia_init()
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* ^^^^^^^^^^^^^^^^^^^^
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*
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* This routine performs low-level PCMCIA initialization and then
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* registers this socket driver with Card Services.
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*
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* Returns: 0 on success, -ve error code on failure
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*/
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static int __init sa11x0_pcmcia_init(void)
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{
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return driver_register(&sa11x0_pcmcia_driver);
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}
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/* sa11x0_pcmcia_exit()
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* ^^^^^^^^^^^^^^^^^^^^
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* Invokes the low-level kernel service to free IRQs associated with this
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* socket controller and reset GPIO edge detection.
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*/
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static void __exit sa11x0_pcmcia_exit(void)
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{
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driver_unregister(&sa11x0_pcmcia_driver);
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}
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MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>");
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MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11x0 Socket Controller");
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MODULE_LICENSE("Dual MPL/GPL");
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fs_initcall(sa11x0_pcmcia_init);
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module_exit(sa11x0_pcmcia_exit);
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