[PATCH] PCMCIA: add Cogent CSB726 PCMCIA support

[Dmitry Eremin-Solenikov]

On 13.05.2010 15:46, Vladimir Zapolskiy wrote:
> This patch adds support for CompactFlash socket found in CSB726 board.

Acked-by: Dmitry Eremin-Solenikov <dbaryshkov at gmail.com>

> Signed-off-by: Vladimir Zapolskiy<vzapolskiy at gmail.com>
> Cc: Dmitry Eremin-Solenikov<dbaryshkov at gmail.com>
> Cc: Dominik Brodowski<linux at dominikbrodowski.net>
> ---
>   drivers/pcmcia/Kconfig         |    3 +-
>   drivers/pcmcia/Makefile        |    1 +
>   drivers/pcmcia/pxa2xx_csb726.c |  155 ++++++++++++++++++++++++++++++++++++++++
>   3 files changed, 158 insertions(+), 1 deletions(-)
>   create mode 100644 drivers/pcmcia/pxa2xx_csb726.c
>
> diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
> index 9f3adbd..168219b 100644
> --- a/drivers/pcmcia/Kconfig
> +++ b/drivers/pcmcia/Kconfig
> @@ -208,7 +208,8 @@ config PCMCIA_PXA2XX
>   	depends on ARM&&  ARCH_PXA&&  PCMCIA
>   	depends on (ARCH_LUBBOCK || MACH_MAINSTONE || PXA_SHARPSL \
>   		    || MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA \
> -		    || ARCOM_PCMCIA || ARCH_PXA_ESERIES || MACH_STARGATE2)
> +		    || ARCOM_PCMCIA || ARCH_PXA_ESERIES || MACH_STARGATE2 \
> +		    || MACH_CSB726)
>   	select PCMCIA_SOC_COMMON
>   	help
>   	  Say Y here to include support for the PXA2xx PCMCIA controller
> diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
> index 83ff802..efcda3f 100644
> --- a/drivers/pcmcia/Makefile
> +++ b/drivers/pcmcia/Makefile
> @@ -74,5 +74,6 @@ pxa2xx-obj-$(CONFIG_MACH_PALMTC)		+= pxa2xx_palmtc.o
>   pxa2xx-obj-$(CONFIG_MACH_PALMLD)		+= pxa2xx_palmld.o
>   pxa2xx-obj-$(CONFIG_MACH_E740)			+= pxa2xx_e740.o
>   pxa2xx-obj-$(CONFIG_MACH_STARGATE2)		+= pxa2xx_stargate2.o
> +pxa2xx-obj-$(CONFIG_MACH_CSB726)		+= pxa2xx_csb726.o
>
>   obj-$(CONFIG_PCMCIA_PXA2XX)			+= pxa2xx_base.o $(pxa2xx-obj-y)
> diff --git a/drivers/pcmcia/pxa2xx_csb726.c b/drivers/pcmcia/pxa2xx_csb726.c
> new file mode 100644
> index 0000000..78052db
> --- /dev/null
> +++ b/drivers/pcmcia/pxa2xx_csb726.c
> @@ -0,0 +1,155 @@
> +/*
> + * linux/drivers/pcmcia/pxa2xx_csb726.c
> + *
> + * Cogent CSB726 Compact Flash specific routines.
> + *
> + * Copyright 2010 Vladimir Zapolskiy<vzapolskiy at gmail.com>
> + *
> + * 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 GPIO_CF_RDY     98
> +#define GPIO_CF_CD      99
> +#define GPIO_CF_RST     103
> +
> +static struct pcmcia_irqs irqs[] = {
> +	{
> +		.sock = 0,
> +		.irq  = IRQ_GPIO(GPIO_CF_CD),
> +		.str  = "PCMCIA0 CD" },
> +};
> +
> +static int csb726_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
> +{
> +	int ret;
> +
> +	ret = gpio_request(GPIO_CF_RST, "CF reset");
> +	if (ret)
> +		return ret;
> +	gpio_direction_output(GPIO_CF_RST, 0);
> +
> +	skt->socket.pci_irq = IRQ_GPIO(GPIO_CF_RDY);
> +	ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
> +	if (!ret)
> +		gpio_free(GPIO_CF_RST);
> +
> +	return ret;
> +}
> +
> +static void csb726_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
> +{
> +	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
> +	gpio_free(GPIO_CF_RST);
> +}
> +
> +static void csb726_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
> +				       struct pcmcia_state *state)
> +{
> +	state->detect = !gpio_get_value(GPIO_CF_CD);
> +	state->ready  = !!gpio_get_value(GPIO_CF_RDY);
> +	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 */
> +	state->wrprot = 0; /* not available - write protect */
> +}
> +
> +static int csb726_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
> +					  const socket_state_t *state)
> +{
> +	switch (skt->nr) {
> +	case 0:
> +		if (state->flags&  SS_RESET) {
> +			/* reset */
> +			gpio_set_value(GPIO_CF_RST, 1);
> +			udelay(10);
> +			gpio_set_value(GPIO_CF_RST, 0);
> +		}
> +		break;
> +	}
> +
> +	return 0;
> +}
> +
> +static void csb726_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
> +{
> +	soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
> +}
> +
> +static void csb726_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
> +{
> +	soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
> +}
> +
> +static struct pcmcia_low_level csb726_pcmcia_ops __initdata = {
> +	.owner			= THIS_MODULE,
> +	.hw_init		= csb726_pcmcia_hw_init,
> +	.hw_shutdown		= csb726_pcmcia_hw_shutdown,
> +	.socket_state		= csb726_pcmcia_socket_state,
> +	.configure_socket	= csb726_pcmcia_configure_socket,
> +	.socket_init		= csb726_pcmcia_socket_init,
> +	.socket_suspend		= csb726_pcmcia_socket_suspend,
> +	.nr			= 1,
> +};
> +
> +static struct platform_device *csb726_pcmcia_device;
> +
> +static int __init csb726_pcmcia_init(void)
> +{
> +	int ret;
> +
> +	if (!machine_is_csb726())
> +		return -ENODEV;
> +
> +	csb726_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
> +	if (!csb726_pcmcia_device)
> +		return -ENOMEM;
> +
> +	ret = platform_device_add_data(csb726_pcmcia_device,
> +				&csb726_pcmcia_ops,
> +				       sizeof(csb726_pcmcia_ops));
> +	if (ret)
> +		goto error_put_platform_device;
> +
> +	ret = platform_device_add(csb726_pcmcia_device);
> +	if (ret)
> +		goto error_put_platform_device;
> +
> +	return 0;
> +
> +error_put_platform_device:
> +	platform_device_put(csb726_pcmcia_device);
> +
> +	return ret;
> +}
> +
> +static void __exit csb726_pcmcia_exit(void)
> +{
> +	platform_device_unregister(csb726_pcmcia_device);
> +}
> +
> +fs_initcall(csb726_pcmcia_init);
> +module_exit(csb726_pcmcia_exit);
> +
> +MODULE_DESCRIPTION("Cogent CSB726 Compact Flash Driver");
> +MODULE_AUTHOR("Vladimir Zapolskiy<vzapolskiy at gmail.com>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("platform:pxa2xx-pcmcia");


-- 
With best wishes
Dmitry