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216 lines
5.9 KiB
216 lines
5.9 KiB
/*====================================================================== |
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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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<[email protected]>. 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 <[email protected]>"); |
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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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