diff options
Diffstat (limited to 'arch/arm/mach-pxa/viper-pcmcia.c')
| -rw-r--r-- | arch/arm/mach-pxa/viper-pcmcia.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/viper-pcmcia.c b/arch/arm/mach-pxa/viper-pcmcia.c new file mode 100644 index 000000000000..26599dcc49b3 --- /dev/null +++ b/arch/arm/mach-pxa/viper-pcmcia.c @@ -0,0 +1,180 @@ +/* + * Viper/Zeus PCMCIA support + * Copyright 2004 Arcom Control Systems + * + * Maintained by Marc Zyngier <maz@misterjones.org> + * + * Based on: + * iPAQ h2200 PCMCIA support + * Copyright 2004 Koen Kooi <koen@vestingbar.nl> + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> + +#include <pcmcia/ss.h> +#include <pcmcia/soc_common.h> + +#include <asm/irq.h> + +#include "viper-pcmcia.h" + +static struct platform_device *arcom_pcmcia_dev; + +static inline struct arcom_pcmcia_pdata *viper_get_pdata(void) +{ + return arcom_pcmcia_dev->dev.platform_data; +} + +static int viper_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + struct arcom_pcmcia_pdata *pdata = viper_get_pdata(); + unsigned long flags; + + skt->stat[SOC_STAT_CD].gpio = pdata->cd_gpio; + skt->stat[SOC_STAT_CD].name = "PCMCIA_CD"; + skt->stat[SOC_STAT_RDY].gpio = pdata->rdy_gpio; + skt->stat[SOC_STAT_RDY].name = "CF ready"; + + if (gpio_request(pdata->pwr_gpio, "CF power")) + goto err_request_pwr; + + local_irq_save(flags); + + if (gpio_direction_output(pdata->pwr_gpio, 0)) { + local_irq_restore(flags); + goto err_dir; + } + + local_irq_restore(flags); + + return 0; + +err_dir: + gpio_free(pdata->pwr_gpio); +err_request_pwr: + dev_err(&arcom_pcmcia_dev->dev, "Failed to setup PCMCIA GPIOs\n"); + return -1; +} + +/* + * Release all resources. + */ +static void viper_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) +{ + struct arcom_pcmcia_pdata *pdata = viper_get_pdata(); + + gpio_free(pdata->pwr_gpio); +} + +static void viper_pcmcia_socket_state(struct soc_pcmcia_socket *skt, + struct pcmcia_state *state) +{ + state->vs_3v = 1; /* Can only apply 3.3V */ + state->vs_Xv = 0; +} + +static int viper_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + struct arcom_pcmcia_pdata *pdata = viper_get_pdata(); + + /* Silently ignore Vpp, output enable, speaker enable. */ + pdata->reset(state->flags & SS_RESET); + + /* Apply socket voltage */ + switch (state->Vcc) { + case 0: + gpio_set_value(pdata->pwr_gpio, 0); + break; + case 33: + gpio_set_value(pdata->pwr_gpio, 1); + break; + default: + dev_err(&arcom_pcmcia_dev->dev, "Unsupported Vcc:%d\n", state->Vcc); + return -1; + } + + return 0; +} + +static struct pcmcia_low_level viper_pcmcia_ops = { + .owner = THIS_MODULE, + .hw_init = viper_pcmcia_hw_init, + .hw_shutdown = viper_pcmcia_hw_shutdown, + .socket_state = viper_pcmcia_socket_state, + .configure_socket = viper_pcmcia_configure_socket, + .nr = 1, +}; + +static struct platform_device *viper_pcmcia_device; + +static int viper_pcmcia_probe(struct platform_device *pdev) +{ + int ret; + + /* I can't imagine more than one device, but you never know... */ + if (arcom_pcmcia_dev) + return -EEXIST; + + if (!pdev->dev.platform_data) + return -EINVAL; + + viper_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); + if (!viper_pcmcia_device) + return -ENOMEM; + + arcom_pcmcia_dev = pdev; + + viper_pcmcia_device->dev.parent = &pdev->dev; + + ret = platform_device_add_data(viper_pcmcia_device, + &viper_pcmcia_ops, + sizeof(viper_pcmcia_ops)); + + if (!ret) + ret = platform_device_add(viper_pcmcia_device); + + if (ret) { + platform_device_put(viper_pcmcia_device); + arcom_pcmcia_dev = NULL; + } + + return ret; +} + +static int viper_pcmcia_remove(struct platform_device *pdev) +{ + platform_device_unregister(viper_pcmcia_device); + arcom_pcmcia_dev = NULL; + return 0; +} + +static struct platform_device_id viper_pcmcia_id_table[] = { + { .name = "viper-pcmcia", }, + { .name = "zeus-pcmcia", }, + { }, +}; + +static struct platform_driver viper_pcmcia_driver = { + .probe = viper_pcmcia_probe, + .remove = viper_pcmcia_remove, + .driver = { + .name = "arcom-pcmcia", + }, + .id_table = viper_pcmcia_id_table, +}; + +module_platform_driver(viper_pcmcia_driver); + +MODULE_DEVICE_TABLE(platform, viper_pcmcia_id_table); +MODULE_LICENSE("GPL"); |