diff options
Diffstat (limited to 'drivers/pcmcia/pxa2xx_cm_x255.c')
| -rw-r--r-- | drivers/pcmcia/pxa2xx_cm_x255.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/drivers/pcmcia/pxa2xx_cm_x255.c b/drivers/pcmcia/pxa2xx_cm_x255.c new file mode 100644 index 00000000000..7c8bcb47662 --- /dev/null +++ b/drivers/pcmcia/pxa2xx_cm_x255.c @@ -0,0 +1,154 @@ +/* + * linux/drivers/pcmcia/pxa/pxa_cm_x255.c + * + * 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. + * + * Compulab Ltd., 2003, 2007, 2008 + * Mike Rapoport <mike@compulab.co.il> + * + */ + +#include <linux/platform_device.h> +#include <linux/irq.h> +#include <linux/delay.h> +#include <linux/gpio.h> + +#include <asm/mach-types.h> +#include <mach/pxa-regs.h> + +#include "soc_common.h" + +#define GPIO_PCMCIA_SKTSEL (54) +#define GPIO_PCMCIA_S0_CD_VALID (16) +#define GPIO_PCMCIA_S1_CD_VALID (17) +#define GPIO_PCMCIA_S0_RDYINT (6) +#define GPIO_PCMCIA_S1_RDYINT (8) +#define GPIO_PCMCIA_RESET (9) + +#define PCMCIA_S0_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S0_CD_VALID) +#define PCMCIA_S1_CD_VALID IRQ_GPIO(GPIO_PCMCIA_S1_CD_VALID) +#define PCMCIA_S0_RDYINT IRQ_GPIO(GPIO_PCMCIA_S0_RDYINT) +#define PCMCIA_S1_RDYINT IRQ_GPIO(GPIO_PCMCIA_S1_RDYINT) + + +static struct pcmcia_irqs irqs[] = { + { 0, PCMCIA_S0_CD_VALID, "PCMCIA0 CD" }, + { 1, PCMCIA_S1_CD_VALID, "PCMCIA1 CD" }, +}; + +static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt) +{ + int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset"); + if (ret) + return ret; + gpio_direction_output(GPIO_PCMCIA_RESET, 0); + + skt->irq = skt->nr == 0 ? PCMCIA_S0_RDYINT : PCMCIA_S1_RDYINT; + ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs)); + if (!ret) + gpio_free(GPIO_PCMCIA_RESET); + + return ret; +} + +static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt) +{ + soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs)); + gpio_free(GPIO_PCMCIA_RESET); +} + + +static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt, + struct pcmcia_state *state) +{ + int cd = skt->nr ? GPIO_PCMCIA_S1_CD_VALID : GPIO_PCMCIA_S0_CD_VALID; + int rdy = skt->nr ? GPIO_PCMCIA_S0_RDYINT : GPIO_PCMCIA_S1_RDYINT; + + state->detect = !gpio_get_value(cd); + state->ready = !!gpio_get_value(rdy); + state->bvd1 = 1; + state->bvd2 = 1; + state->vs_3v = 0; + state->vs_Xv = 0; + state->wrprot = 0; /* not available */ +} + + +static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, + const socket_state_t *state) +{ + switch (skt->nr) { + case 0: + if (state->flags & SS_RESET) { + gpio_set_value(GPIO_PCMCIA_SKTSEL, 0); + udelay(1); + gpio_set_value(GPIO_PCMCIA_RESET, 1); + udelay(10); + gpio_set_value(GPIO_PCMCIA_RESET, 0); + } + break; + case 1: + if (state->flags & SS_RESET) { + gpio_set_value(GPIO_PCMCIA_SKTSEL, 1); + udelay(1); + gpio_set_value(GPIO_PCMCIA_RESET, 1); + udelay(10); + gpio_set_value(GPIO_PCMCIA_RESET, 0); + } + break; + } + + return 0; +} + +static void cmx255_pcmcia_socket_init(struct soc_pcmcia_socket *skt) +{ +} + +static void cmx255_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) +{ +} + + +static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = { + .owner = THIS_MODULE, + .hw_init = cmx255_pcmcia_hw_init, + .hw_shutdown = cmx255_pcmcia_shutdown, + .socket_state = cmx255_pcmcia_socket_state, + .configure_socket = cmx255_pcmcia_configure_socket, + .socket_init = cmx255_pcmcia_socket_init, + .socket_suspend = cmx255_pcmcia_socket_suspend, + .nr = 1, +}; + +static struct platform_device *cmx255_pcmcia_device; + +int __init cmx255_pcmcia_init(void) +{ + int ret; + + cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); + + if (!cmx255_pcmcia_device) + return -ENOMEM; + + ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops, + sizeof(cmx255_pcmcia_ops)); + + if (ret == 0) { + printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n"); + ret = platform_device_add(cmx255_pcmcia_device); + } + + if (ret) + platform_device_put(cmx255_pcmcia_device); + + return ret; +} + +void __exit cmx255_pcmcia_exit(void) +{ + platform_device_unregister(cmx255_pcmcia_device); +} |