diff options
Diffstat (limited to 'drivers/pcmcia/sa1100_generic.c')
| -rw-r--r-- | drivers/pcmcia/sa1100_generic.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/drivers/pcmcia/sa1100_generic.c b/drivers/pcmcia/sa1100_generic.c new file mode 100644 index 000000000..c2b6e828c --- /dev/null +++ b/drivers/pcmcia/sa1100_generic.c @@ -0,0 +1,216 @@ +/*====================================================================== + + Device driver for the PCMCIA control functionality of StrongARM + SA-1100 microprocessors. + + The contents of this file are subject to the Mozilla Public + License Version 1.1 (the "License"); you may not use this file + except in compliance with the License. You may obtain a copy of + the License at http://www.mozilla.org/MPL/ + + Software distributed under the License is distributed on an "AS + IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or + implied. See the License for the specific language governing + rights and limitations under the License. + + The initial developer of the original code is John G. Dorsey + <john+@cs.cmu.edu>. Portions created by John G. Dorsey are + Copyright (C) 1999 John G. Dorsey. All Rights Reserved. + + Alternatively, the contents of this file may be used under the + terms of the GNU Public License version 2 (the "GPL"), in which + case the provisions of the GPL are applicable instead of the + above. If you wish to allow the use of your version of this file + only under the terms of the GPL and not to allow others to use + your version of this file under the MPL, indicate your decision + by deleting the provisions above and replace them with the notice + and other provisions required by the GPL. If you do not delete + the provisions above, a recipient may use your version of this + file under either the MPL or the GPL. + +======================================================================*/ + +#include <linux/module.h> +#include <linux/gpio/consumer.h> +#include <linux/init.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> +#include <linux/platform_device.h> + +#include <pcmcia/ss.h> + +#include <asm/hardware/scoop.h> + +#include "sa1100_generic.h" + +static const char *sa11x0_cf_gpio_names[] = { + [SOC_STAT_CD] = "detect", + [SOC_STAT_BVD1] = "bvd1", + [SOC_STAT_BVD2] = "bvd2", + [SOC_STAT_RDY] = "ready", +}; + +static int sa11x0_cf_hw_init(struct soc_pcmcia_socket *skt) +{ + struct device *dev = skt->socket.dev.parent; + int i; + + skt->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(skt->gpio_reset)) + return PTR_ERR(skt->gpio_reset); + + skt->gpio_bus_enable = devm_gpiod_get_optional(dev, "bus-enable", + GPIOD_OUT_HIGH); + if (IS_ERR(skt->gpio_bus_enable)) + return PTR_ERR(skt->gpio_bus_enable); + + skt->vcc.reg = devm_regulator_get_optional(dev, "vcc"); + if (IS_ERR(skt->vcc.reg)) + return PTR_ERR(skt->vcc.reg); + + if (!skt->vcc.reg) + dev_warn(dev, + "no Vcc regulator provided, ignoring Vcc controls\n"); + + for (i = 0; i < ARRAY_SIZE(sa11x0_cf_gpio_names); i++) { + skt->stat[i].name = sa11x0_cf_gpio_names[i]; + skt->stat[i].desc = devm_gpiod_get_optional(dev, + sa11x0_cf_gpio_names[i], GPIOD_IN); + if (IS_ERR(skt->stat[i].desc)) + return PTR_ERR(skt->stat[i].desc); + } + return 0; +} + +static int sa11x0_cf_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + return soc_pcmcia_regulator_set(skt, &skt->vcc, state->Vcc); +} + +static struct pcmcia_low_level sa11x0_cf_ops = { + .owner = THIS_MODULE, + .hw_init = sa11x0_cf_hw_init, + .socket_state = soc_common_cf_socket_state, + .configure_socket = sa11x0_cf_configure_socket, +}; + +int __init pcmcia_collie_init(struct device *dev); + +static int (*sa11x0_pcmcia_legacy_hw_init[])(struct device *dev) = { +#if defined(CONFIG_SA1100_H3100) || defined(CONFIG_SA1100_H3600) + pcmcia_h3600_init, +#endif +#ifdef CONFIG_SA1100_SIMPAD + pcmcia_simpad_init, +#endif +#ifdef CONFIG_SA1100_COLLIE + pcmcia_collie_init, +#endif +}; + +static int sa11x0_drv_pcmcia_legacy_probe(struct platform_device *dev) +{ + int i, ret = -ENODEV; + + /* + * Initialise any "on-board" PCMCIA sockets. + */ + for (i = 0; i < ARRAY_SIZE(sa11x0_pcmcia_legacy_hw_init); i++) { + ret = sa11x0_pcmcia_legacy_hw_init[i](&dev->dev); + if (ret == 0) + break; + } + + return ret; +} + +static void sa11x0_drv_pcmcia_legacy_remove(struct platform_device *dev) +{ + struct skt_dev_info *sinfo = platform_get_drvdata(dev); + int i; + + platform_set_drvdata(dev, NULL); + + for (i = 0; i < sinfo->nskt; i++) + soc_pcmcia_remove_one(&sinfo->skt[i]); +} + +static int sa11x0_drv_pcmcia_probe(struct platform_device *pdev) +{ + struct soc_pcmcia_socket *skt; + struct device *dev = &pdev->dev; + + if (pdev->id == -1) + return sa11x0_drv_pcmcia_legacy_probe(pdev); + + skt = devm_kzalloc(dev, sizeof(*skt), GFP_KERNEL); + if (!skt) + return -ENOMEM; + + platform_set_drvdata(pdev, skt); + + skt->nr = pdev->id; + skt->clk = devm_clk_get(dev, NULL); + if (IS_ERR(skt->clk)) + return PTR_ERR(skt->clk); + + sa11xx_drv_pcmcia_ops(&sa11x0_cf_ops); + soc_pcmcia_init_one(skt, &sa11x0_cf_ops, dev); + + return sa11xx_drv_pcmcia_add_one(skt); +} + +static int sa11x0_drv_pcmcia_remove(struct platform_device *dev) +{ + struct soc_pcmcia_socket *skt; + + if (dev->id == -1) { + sa11x0_drv_pcmcia_legacy_remove(dev); + return 0; + } + + skt = platform_get_drvdata(dev); + + soc_pcmcia_remove_one(skt); + + return 0; +} + +static struct platform_driver sa11x0_pcmcia_driver = { + .driver = { + .name = "sa11x0-pcmcia", + }, + .probe = sa11x0_drv_pcmcia_probe, + .remove = sa11x0_drv_pcmcia_remove, +}; + +/* sa11x0_pcmcia_init() + * ^^^^^^^^^^^^^^^^^^^^ + * + * This routine performs low-level PCMCIA initialization and then + * registers this socket driver with Card Services. + * + * Returns: 0 on success, -ve error code on failure + */ +static int __init sa11x0_pcmcia_init(void) +{ + return platform_driver_register(&sa11x0_pcmcia_driver); +} + +/* sa11x0_pcmcia_exit() + * ^^^^^^^^^^^^^^^^^^^^ + * Invokes the low-level kernel service to free IRQs associated with this + * socket controller and reset GPIO edge detection. + */ +static void __exit sa11x0_pcmcia_exit(void) +{ + platform_driver_unregister(&sa11x0_pcmcia_driver); +} + +MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>"); +MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11x0 Socket Controller"); +MODULE_LICENSE("Dual MPL/GPL"); + +fs_initcall(sa11x0_pcmcia_init); +module_exit(sa11x0_pcmcia_exit); |