diff options
Diffstat (limited to 'drivers/pcmcia/pxa2xx_stargate2.c')
| -rw-r--r-- | drivers/pcmcia/pxa2xx_stargate2.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/drivers/pcmcia/pxa2xx_stargate2.c b/drivers/pcmcia/pxa2xx_stargate2.c new file mode 100644 index 000000000..1d73c4401 --- /dev/null +++ b/drivers/pcmcia/pxa2xx_stargate2.c @@ -0,0 +1,140 @@ +/* + * linux/drivers/pcmcia/pxa2xx_stargate2.c + * + * Stargate 2 PCMCIA specific routines. + * + * Created: December 6, 2005 + * Author: Ed C. Epp + * Copyright: Intel Corp 2005 + * Jonathan Cameron <jic23@cam.ac.uk> 2009 + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> + +#include <pcmcia/ss.h> + +#include <asm/irq.h> +#include <asm/mach-types.h> + +#include "soc_common.h" + +#define SG2_S0_POWER_CTL 108 +#define SG2_S0_GPIO_RESET 82 +#define SG2_S0_GPIO_DETECT 53 +#define SG2_S0_GPIO_READY 81 + +static struct gpio sg2_pcmcia_gpios[] = { + { SG2_S0_GPIO_RESET, GPIOF_OUT_INIT_HIGH, "PCMCIA Reset" }, + { SG2_S0_POWER_CTL, GPIOF_OUT_INIT_HIGH, "PCMCIA Power Ctrl" }, +}; + +static int sg2_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + skt->stat[SOC_STAT_CD].gpio = SG2_S0_GPIO_DETECT; + skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD"; + skt->stat[SOC_STAT_RDY].gpio = SG2_S0_GPIO_READY; + skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY"; + return 0; +} + +static void sg2_pcmcia_socket_state(struct soc_pcmcia_socket *skt, + struct pcmcia_state *state) +{ + state->bvd1 = 0; /* not available - battery detect on card */ + state->bvd2 = 0; /* not available */ + state->vs_3v = 1; /* not available - voltage detect for card */ + state->vs_Xv = 0; /* not available */ +} + +static int sg2_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + /* Enable card power */ + switch (state->Vcc) { + case 0: + /* sets power ctl register high */ + gpio_set_value(SG2_S0_POWER_CTL, 1); + break; + case 33: + case 50: + /* sets power control register low (clear) */ + gpio_set_value(SG2_S0_POWER_CTL, 0); + msleep(100); + break; + default: + pr_err("%s(): bad Vcc %u\n", + __func__, state->Vcc); + return -1; + } + + /* reset */ + gpio_set_value(SG2_S0_GPIO_RESET, !!(state->flags & SS_RESET)); + + return 0; +} + +static struct pcmcia_low_level sg2_pcmcia_ops __initdata = { + .owner = THIS_MODULE, + .hw_init = sg2_pcmcia_hw_init, + .socket_state = sg2_pcmcia_socket_state, + .configure_socket = sg2_pcmcia_configure_socket, + .nr = 1, +}; + +static struct platform_device *sg2_pcmcia_device; + +static int __init sg2_pcmcia_init(void) +{ + int ret; + + if (!machine_is_stargate2()) + return -ENODEV; + + sg2_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); + if (!sg2_pcmcia_device) + return -ENOMEM; + + ret = gpio_request_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios)); + if (ret) + goto error_put_platform_device; + + ret = platform_device_add_data(sg2_pcmcia_device, + &sg2_pcmcia_ops, + sizeof(sg2_pcmcia_ops)); + if (ret) + goto error_free_gpios; + + ret = platform_device_add(sg2_pcmcia_device); + if (ret) + goto error_free_gpios; + + return 0; +error_free_gpios: + gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios)); +error_put_platform_device: + platform_device_put(sg2_pcmcia_device); + + return ret; +} + +static void __exit sg2_pcmcia_exit(void) +{ + platform_device_unregister(sg2_pcmcia_device); + gpio_free_array(sg2_pcmcia_gpios, ARRAY_SIZE(sg2_pcmcia_gpios)); +} + +fs_initcall(sg2_pcmcia_init); +module_exit(sg2_pcmcia_exit); + +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:pxa2xx-pcmcia"); |