[PATCH Resend] PCMCIA: add Cogent CSB726 PCMCIA support
Marek Vasut
marek.vasut at gmail.com
Mon Jun 7 12:56:56 EDT 2010
Dne Po 7. června 2010 18:24:57 Dominik Brodowski napsal(a):
> Russell,
>
> have you had a chance to review this patch, and/or decide which way it
> should take upstream?
>
> Best,
> Dominik
>
> On Thu, Jun 03, 2010 at 05:25:50PM +0400, Vladimir Zapolskiy wrote:
> > This patch adds support for CompactFlash socket found in CSB726 board.
> >
> > Signed-off-by: Vladimir Zapolskiy <vzapolskiy at gmail.com>
> > Cc: Dmitry Eremin-Solenikov <dbaryshkov at gmail.com>
> > Cc: Dominik Brodowski <linux at dominikbrodowski.net>
> > Acked-by: Dmitry Eremin-Solenikov <dbaryshkov at gmail.com>
> > Acked-by: Dominik Brodowski<linux at dominikbrodowski.net>
> > ---
> >
> > drivers/pcmcia/Kconfig | 3 +-
> > drivers/pcmcia/Makefile | 1 +
> > drivers/pcmcia/pxa2xx_csb726.c | 156
> > ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 159
> > 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..bd86e90
> > --- /dev/null
> > +++ b/drivers/pcmcia/pxa2xx_csb726.c
> > @@ -0,0 +1,156 @@
> > +/*
> > + * 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);
This can also fail.
> > +
> > + skt->socket.pci_irq = IRQ_GPIO(GPIO_CF_RDY);
gpio_to_irq();
> > + ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
> > + if (!ret)
> > + gpio_free(GPIO_CF_RST);
Use a failpath here:
if (ret) { dev_err(); goto err1; }
return 0;
err1:
...
> > +
> > + 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);
Is the double negation (!!) needed here?
> > + 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:
You registered just one socket anyway ... how can socket->nr be != 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_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");
>
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