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linux-next/arch/arm/mach-at91rm9200/devices.c
Andrew Victor df666b9c51 [ARM] 3325/2: GPIO function to control multi-drive (open collector) capability 
Patch from Andrew Victor

This patch adds the at91_set_multi_drive() function to enable/disable
the multi-drive (open collector) pin capability on the AT91RM9200
processor.

This is necessary to fix the UDC (USB Gadget) driver for the AT91RM9200
board as it will not allow the board reset line to be pulled low if the
pullup is not driven as an open collector output as the boards are wired
to the USB connector on both the DK/EK.

This version of the patch updates it to 2.6.16-rc4.
Orignal patch by Jeff Warren.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-02-22 21:23:35 +00:00

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/*
* arch/arm/mach-at91rm9200/devices.c
*
* Copyright (C) 2005 Thibaut VARENE <varenet@parisc-linux.org>
* Copyright (C) 2005 David Brownell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <linux/config.h>
#include <linux/platform_device.h>
#include <asm/arch/board.h>
#include <asm/arch/pio.h>
/* --------------------------------------------------------------------
* USB Host
* -------------------------------------------------------------------- */
#if defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
static u64 ohci_dmamask = 0xffffffffUL;
static struct at91_usbh_data usbh_data;
static struct resource at91rm9200_usbh_resource[] = {
[0] = {
.start = AT91_UHP_BASE,
.end = AT91_UHP_BASE + SZ_1M -1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = AT91_ID_UHP,
.end = AT91_ID_UHP,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device at91rm9200_usbh_device = {
.name = "at91rm9200-ohci",
.id = -1,
.dev = {
.dma_mask = &ohci_dmamask,
.coherent_dma_mask = 0xffffffff,
.platform_data = &usbh_data,
},
.resource = at91rm9200_usbh_resource,
.num_resources = ARRAY_SIZE(at91rm9200_usbh_resource),
};
void __init at91_add_device_usbh(struct at91_usbh_data *data)
{
if (!data)
return;
usbh_data = *data;
platform_device_register(&at91rm9200_usbh_device);
}
#else
void __init at91_add_device_usbh(struct at91_usbh_data *data) {}
#endif
/* --------------------------------------------------------------------
* USB Device (Gadget)
* -------------------------------------------------------------------- */
#ifdef CONFIG_USB_GADGET_AT91
static struct at91_udc_data udc_data;
static struct resource at91_udc_resources[] = {
{
.start = AT91_BASE_UDP,
.end = AT91_BASE_UDP + SZ_16K - 1,
.flags = IORESOURCE_MEM,
}
};
static struct platform_device at91rm9200_udc_device = {
.name = "at91_udc",
.id = -1,
.dev = {
.platform_data = &udc_data,
},
.resource = at91_udc_resources,
.num_resources = ARRAY_SIZE(at91_udc_resources),
};
void __init at91_add_device_udc(struct at91_udc_data *data)
{
if (!data)
return;
if (data->vbus_pin) {
at91_set_gpio_input(data->vbus_pin, 0);
at91_set_deglitch(data->vbus_pin, 1);
}
if (data->pullup_pin) {
at91_set_gpio_output(data->pullup_pin, 0);
at91_set_multi_drive(data->pullup_pin, 1);
}
udc_data = *data;
platform_device_register(&at91rm9200_udc_device);
}
#else
void __init at91_add_device_udc(struct at91_udc_data *data) {}
#endif
/* --------------------------------------------------------------------
* Ethernet
* -------------------------------------------------------------------- */
#if defined(CONFIG_ARM_AT91_ETHER) || defined(CONFIG_ARM_AT91_ETHER_MODULE)
static u64 eth_dmamask = 0xffffffffUL;
static struct at91_eth_data eth_data;
static struct platform_device at91rm9200_eth_device = {
.name = "at91_ether",
.id = -1,
.dev = {
.dma_mask = &eth_dmamask,
.coherent_dma_mask = 0xffffffff,
.platform_data = &eth_data,
},
.num_resources = 0,
};
void __init at91_add_device_eth(struct at91_eth_data *data)
{
if (!data)
return;
if (data->phy_irq_pin) {
at91_set_gpio_input(data->phy_irq_pin, 0);
at91_set_deglitch(data->phy_irq_pin, 1);
}
/* Pins used for MII and RMII */
at91_set_A_periph(AT91_PIN_PA16, 0); /* EMDIO */
at91_set_A_periph(AT91_PIN_PA15, 0); /* EMDC */
at91_set_A_periph(AT91_PIN_PA14, 0); /* ERXER */
at91_set_A_periph(AT91_PIN_PA13, 0); /* ERX1 */
at91_set_A_periph(AT91_PIN_PA12, 0); /* ERX0 */
at91_set_A_periph(AT91_PIN_PA11, 0); /* ECRS_ECRSDV */
at91_set_A_periph(AT91_PIN_PA10, 0); /* ETX1 */
at91_set_A_periph(AT91_PIN_PA9, 0); /* ETX0 */
at91_set_A_periph(AT91_PIN_PA8, 0); /* ETXEN */
at91_set_A_periph(AT91_PIN_PA7, 0); /* ETXCK_EREFCK */
if (!data->is_rmii) {
at91_set_B_periph(AT91_PIN_PB19, 0); /* ERXCK */
at91_set_B_periph(AT91_PIN_PB18, 0); /* ECOL */
at91_set_B_periph(AT91_PIN_PB17, 0); /* ERXDV */
at91_set_B_periph(AT91_PIN_PB16, 0); /* ERX3 */
at91_set_B_periph(AT91_PIN_PB15, 0); /* ERX2 */
at91_set_B_periph(AT91_PIN_PB14, 0); /* ETXER */
at91_set_B_periph(AT91_PIN_PB13, 0); /* ETX3 */
at91_set_B_periph(AT91_PIN_PB12, 0); /* ETX2 */
}
eth_data = *data;
platform_device_register(&at91rm9200_eth_device);
}
#else
void __init at91_add_device_eth(struct at91_eth_data *data) {}
#endif
/* --------------------------------------------------------------------
* Compact Flash / PCMCIA
* -------------------------------------------------------------------- */
#if defined(CONFIG_AT91_CF) || defined(CONFIG_AT91_CF_MODULE)
static struct at91_cf_data cf_data;
static struct platform_device at91rm9200_cf_device = {
.name = "at91_cf",
.id = -1,
.dev = {
.platform_data = &cf_data,
},
.num_resources = 0,
};
void __init at91_add_device_cf(struct at91_cf_data *data)
{
if (!data)
return;
/* input/irq */
if (data->irq_pin) {
at91_set_gpio_input(data->irq_pin, 1);
at91_set_deglitch(data->irq_pin, 1);
}
at91_set_gpio_input(data->det_pin, 1);
at91_set_deglitch(data->det_pin, 1);
/* outputs, initially off */
if (data->vcc_pin)
at91_set_gpio_output(data->vcc_pin, 0);
at91_set_gpio_output(data->rst_pin, 0);
cf_data = *data;
platform_device_register(&at91rm9200_cf_device);
}
#else
void __init at91_add_device_cf(struct at91_cf_data *data) {}
#endif
/* --------------------------------------------------------------------
* MMC / SD
* -------------------------------------------------------------------- */
#if defined(CONFIG_MMC_AT91RM9200) || defined(CONFIG_MMC_AT91RM9200_MODULE)
static u64 mmc_dmamask = 0xffffffffUL;
static struct at91_mmc_data mmc_data;
static struct resource at91_mmc_resources[] = {
{
.start = AT91_BASE_MCI,
.end = AT91_BASE_MCI + SZ_16K - 1,
.flags = IORESOURCE_MEM,
}
};
static struct platform_device at91rm9200_mmc_device = {
.name = "at91rm9200_mci",
.id = -1,
.dev = {
.dma_mask = &mmc_dmamask,
.coherent_dma_mask = 0xffffffff,
.platform_data = &mmc_data,
},
.resource = at91_mmc_resources,
.num_resources = ARRAY_SIZE(at91_mmc_resources),
};
void __init at91_add_device_mmc(struct at91_mmc_data *data)
{
if (!data)
return;
/* input/irq */
if (data->det_pin) {
at91_set_gpio_input(data->det_pin, 1);
at91_set_deglitch(data->det_pin, 1);
}
if (data->wp_pin)
at91_set_gpio_input(data->wp_pin, 1);
/* CLK */
at91_set_A_periph(AT91_PIN_PA27, 0);
if (data->is_b) {
/* CMD */
at91_set_B_periph(AT91_PIN_PA8, 0);
/* DAT0, maybe DAT1..DAT3 */
at91_set_B_periph(AT91_PIN_PA9, 0);
if (data->wire4) {
at91_set_B_periph(AT91_PIN_PA10, 0);
at91_set_B_periph(AT91_PIN_PA11, 0);
at91_set_B_periph(AT91_PIN_PA12, 0);
}
} else {
/* CMD */
at91_set_A_periph(AT91_PIN_PA28, 0);
/* DAT0, maybe DAT1..DAT3 */
at91_set_A_periph(AT91_PIN_PA29, 0);
if (data->wire4) {
at91_set_B_periph(AT91_PIN_PB3, 0);
at91_set_B_periph(AT91_PIN_PB4, 0);
at91_set_B_periph(AT91_PIN_PB5, 0);
}
}
mmc_data = *data;
platform_device_register(&at91rm9200_mmc_device);
}
#else
void __init at91_add_device_mmc(struct at91_mmc_data *data) {}
#endif
/* -------------------------------------------------------------------- */
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