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1/*======================================================================2 3 Device driver for the PCMCIA control functionality of StrongARM4 SA-1100 microprocessors.5 6 The contents of this file are subject to the Mozilla Public7 License Version 1.1 (the "License"); you may not use this file8 except in compliance with the License. You may obtain a copy of9 the License at http://www.mozilla.org/MPL/10 11 Software distributed under the License is distributed on an "AS12 IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or13 implied. See the License for the specific language governing14 rights and limitations under the License.15 16 The initial developer of the original code is John G. Dorsey17 <john+@cs.cmu.edu>. Portions created by John G. Dorsey are18 Copyright (C) 1999 John G. Dorsey. All Rights Reserved.19 20 Alternatively, the contents of this file may be used under the21 terms of the GNU Public License version 2 (the "GPL"), in which22 case the provisions of the GPL are applicable instead of the23 above. If you wish to allow the use of your version of this file24 only under the terms of the GPL and not to allow others to use25 your version of this file under the MPL, indicate your decision26 by deleting the provisions above and replace them with the notice27 and other provisions required by the GPL. If you do not delete28 the provisions above, a recipient may use your version of this29 file under either the MPL or the GPL.30 31======================================================================*/32 33#include <linux/module.h>34#include <linux/gpio/consumer.h>35#include <linux/init.h>36#include <linux/regulator/consumer.h>37#include <linux/slab.h>38#include <linux/platform_device.h>39 40#include <pcmcia/ss.h>41 42#include <asm/hardware/scoop.h>43 44#include "sa1100_generic.h"45 46static const char *sa11x0_cf_gpio_names[] = {47 [SOC_STAT_CD] = "detect",48 [SOC_STAT_BVD1] = "bvd1",49 [SOC_STAT_BVD2] = "bvd2",50 [SOC_STAT_RDY] = "ready",51};52 53static int sa11x0_cf_hw_init(struct soc_pcmcia_socket *skt)54{55 struct device *dev = skt->socket.dev.parent;56 int i;57 58 skt->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);59 if (IS_ERR(skt->gpio_reset))60 return PTR_ERR(skt->gpio_reset);61 62 skt->gpio_bus_enable = devm_gpiod_get_optional(dev, "bus-enable",63 GPIOD_OUT_HIGH);64 if (IS_ERR(skt->gpio_bus_enable))65 return PTR_ERR(skt->gpio_bus_enable);66 67 skt->vcc.reg = devm_regulator_get_optional(dev, "vcc");68 if (IS_ERR(skt->vcc.reg))69 return PTR_ERR(skt->vcc.reg);70 71 if (!skt->vcc.reg)72 dev_warn(dev,73 "no Vcc regulator provided, ignoring Vcc controls\n");74 75 for (i = 0; i < ARRAY_SIZE(sa11x0_cf_gpio_names); i++) {76 skt->stat[i].name = sa11x0_cf_gpio_names[i];77 skt->stat[i].desc = devm_gpiod_get_optional(dev,78 sa11x0_cf_gpio_names[i], GPIOD_IN);79 if (IS_ERR(skt->stat[i].desc))80 return PTR_ERR(skt->stat[i].desc);81 }82 return 0;83}84 85static int sa11x0_cf_configure_socket(struct soc_pcmcia_socket *skt,86 const socket_state_t *state)87{88 return soc_pcmcia_regulator_set(skt, &skt->vcc, state->Vcc);89}90 91static struct pcmcia_low_level sa11x0_cf_ops = {92 .owner = THIS_MODULE,93 .hw_init = sa11x0_cf_hw_init,94 .socket_state = soc_common_cf_socket_state,95 .configure_socket = sa11x0_cf_configure_socket,96};97 98int __init pcmcia_collie_init(struct device *dev);99 100static int (*sa11x0_pcmcia_legacy_hw_init[])(struct device *dev) = {101#ifdef CONFIG_SA1100_H3600102 pcmcia_h3600_init,103#endif104#ifdef CONFIG_SA1100_COLLIE105 pcmcia_collie_init,106#endif107};108 109static int sa11x0_drv_pcmcia_legacy_probe(struct platform_device *dev)110{111 int i, ret = -ENODEV;112 113 /*114 * Initialise any "on-board" PCMCIA sockets.115 */116 for (i = 0; i < ARRAY_SIZE(sa11x0_pcmcia_legacy_hw_init); i++) {117 ret = sa11x0_pcmcia_legacy_hw_init[i](&dev->dev);118 if (ret == 0)119 break;120 }121 122 return ret;123}124 125static void sa11x0_drv_pcmcia_legacy_remove(struct platform_device *dev)126{127 struct skt_dev_info *sinfo = platform_get_drvdata(dev);128 int i;129 130 platform_set_drvdata(dev, NULL);131 132 for (i = 0; i < sinfo->nskt; i++)133 soc_pcmcia_remove_one(&sinfo->skt[i]);134}135 136static int sa11x0_drv_pcmcia_probe(struct platform_device *pdev)137{138 struct soc_pcmcia_socket *skt;139 struct device *dev = &pdev->dev;140 141 if (pdev->id == -1)142 return sa11x0_drv_pcmcia_legacy_probe(pdev);143 144 skt = devm_kzalloc(dev, sizeof(*skt), GFP_KERNEL);145 if (!skt)146 return -ENOMEM;147 148 platform_set_drvdata(pdev, skt);149 150 skt->nr = pdev->id;151 skt->clk = devm_clk_get(dev, NULL);152 if (IS_ERR(skt->clk))153 return PTR_ERR(skt->clk);154 155 sa11xx_drv_pcmcia_ops(&sa11x0_cf_ops);156 soc_pcmcia_init_one(skt, &sa11x0_cf_ops, dev);157 158 return sa11xx_drv_pcmcia_add_one(skt);159}160 161static void sa11x0_drv_pcmcia_remove(struct platform_device *dev)162{163 struct soc_pcmcia_socket *skt;164 165 if (dev->id == -1) {166 sa11x0_drv_pcmcia_legacy_remove(dev);167 return;168 }169 170 skt = platform_get_drvdata(dev);171 172 soc_pcmcia_remove_one(skt);173}174 175static struct platform_driver sa11x0_pcmcia_driver = {176 .driver = {177 .name = "sa11x0-pcmcia",178 },179 .probe = sa11x0_drv_pcmcia_probe,180 .remove_new = sa11x0_drv_pcmcia_remove,181};182 183/* sa11x0_pcmcia_init()184 * ^^^^^^^^^^^^^^^^^^^^185 *186 * This routine performs low-level PCMCIA initialization and then187 * registers this socket driver with Card Services.188 *189 * Returns: 0 on success, -ve error code on failure190 */191static int __init sa11x0_pcmcia_init(void)192{193 return platform_driver_register(&sa11x0_pcmcia_driver);194}195 196/* sa11x0_pcmcia_exit()197 * ^^^^^^^^^^^^^^^^^^^^198 * Invokes the low-level kernel service to free IRQs associated with this199 * socket controller and reset GPIO edge detection.200 */201static void __exit sa11x0_pcmcia_exit(void)202{203 platform_driver_unregister(&sa11x0_pcmcia_driver);204}205 206MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>");207MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11x0 Socket Controller");208MODULE_LICENSE("Dual MPL/GPL");209 210fs_initcall(sa11x0_pcmcia_init);211module_exit(sa11x0_pcmcia_exit);212