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![Russell King](/assets/img/avatar_default.png)
Convert shannon to use the generic CF socket support. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
216 lines
5.9 KiB
C
216 lines
5.9 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/gpio/consumer.h>
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#include <linux/init.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <pcmcia/ss.h>
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#include <asm/hardware/scoop.h>
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#include "sa1100_generic.h"
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static const char *sa11x0_cf_gpio_names[] = {
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[SOC_STAT_CD] = "detect",
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[SOC_STAT_BVD1] = "bvd1",
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[SOC_STAT_BVD2] = "bvd2",
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[SOC_STAT_RDY] = "ready",
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};
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static int sa11x0_cf_hw_init(struct soc_pcmcia_socket *skt)
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{
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struct device *dev = skt->socket.dev.parent;
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int i;
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skt->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
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if (IS_ERR(skt->gpio_reset))
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return PTR_ERR(skt->gpio_reset);
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skt->gpio_bus_enable = devm_gpiod_get_optional(dev, "bus-enable",
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GPIOD_OUT_HIGH);
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if (IS_ERR(skt->gpio_bus_enable))
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return PTR_ERR(skt->gpio_bus_enable);
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skt->vcc.reg = devm_regulator_get_optional(dev, "vcc");
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if (IS_ERR(skt->vcc.reg))
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return PTR_ERR(skt->vcc.reg);
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if (!skt->vcc.reg)
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dev_warn(dev,
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"no Vcc regulator provided, ignoring Vcc controls\n");
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for (i = 0; i < ARRAY_SIZE(sa11x0_cf_gpio_names); i++) {
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skt->stat[i].name = sa11x0_cf_gpio_names[i];
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skt->stat[i].desc = devm_gpiod_get_optional(dev,
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sa11x0_cf_gpio_names[i], GPIOD_IN);
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if (IS_ERR(skt->stat[i].desc))
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return PTR_ERR(skt->stat[i].desc);
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}
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return 0;
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}
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static int sa11x0_cf_configure_socket(struct soc_pcmcia_socket *skt,
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const socket_state_t *state)
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{
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return soc_pcmcia_regulator_set(skt, &skt->vcc, state->Vcc);
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}
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static struct pcmcia_low_level sa11x0_cf_ops = {
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.owner = THIS_MODULE,
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.hw_init = sa11x0_cf_hw_init,
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.socket_state = soc_common_cf_socket_state,
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.configure_socket = sa11x0_cf_configure_socket,
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};
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int __init pcmcia_collie_init(struct device *dev);
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static int (*sa11x0_pcmcia_legacy_hw_init[])(struct device *dev) = {
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#if defined(CONFIG_SA1100_H3100) || defined(CONFIG_SA1100_H3600)
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pcmcia_h3600_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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#ifdef CONFIG_SA1100_COLLIE
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pcmcia_collie_init,
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#endif
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};
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static int sa11x0_drv_pcmcia_legacy_probe(struct platform_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_legacy_hw_init); i++) {
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ret = sa11x0_pcmcia_legacy_hw_init[i](&dev->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_legacy_remove(struct platform_device *dev)
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{
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struct skt_dev_info *sinfo = platform_get_drvdata(dev);
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int i;
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platform_set_drvdata(dev, NULL);
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for (i = 0; i < sinfo->nskt; i++)
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soc_pcmcia_remove_one(&sinfo->skt[i]);
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return 0;
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}
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static int sa11x0_drv_pcmcia_probe(struct platform_device *pdev)
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{
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struct soc_pcmcia_socket *skt;
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struct device *dev = &pdev->dev;
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if (pdev->id == -1)
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return sa11x0_drv_pcmcia_legacy_probe(pdev);
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skt = devm_kzalloc(dev, sizeof(*skt), GFP_KERNEL);
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if (!skt)
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return -ENOMEM;
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platform_set_drvdata(pdev, skt);
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skt->nr = pdev->id;
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skt->clk = devm_clk_get(dev, NULL);
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if (IS_ERR(skt->clk))
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return PTR_ERR(skt->clk);
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sa11xx_drv_pcmcia_ops(&sa11x0_cf_ops);
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soc_pcmcia_init_one(skt, &sa11x0_cf_ops, dev);
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return sa11xx_drv_pcmcia_add_one(skt);
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}
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static int sa11x0_drv_pcmcia_remove(struct platform_device *dev)
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{
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struct soc_pcmcia_socket *skt;
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if (dev->id == -1)
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return sa11x0_drv_pcmcia_legacy_remove(dev);
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skt = platform_get_drvdata(dev);
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soc_pcmcia_remove_one(skt);
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return 0;
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}
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static struct platform_driver sa11x0_pcmcia_driver = {
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.driver = {
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.name = "sa11x0-pcmcia",
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},
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.probe = sa11x0_drv_pcmcia_probe,
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.remove = sa11x0_drv_pcmcia_remove,
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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 platform_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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platform_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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