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avr32: some mmc/sd cleanups 

Minor cleanups for the MMC/SD support on avr32:

 - Make at32_add_device_mci() properly initialize "missing"
   platform data ... so boards like STK1002 won't try GPIO 0.

 - Switch over to gpio_is_valid() instead of testing for only
   one designated value.

 - Provide STK1002 platform data for the unlikely case that
   switches are set so first Ethernet controller isn't in use.
   (That's the only way to get card detect and writeprotect
   switch sensing on the STK1000.)

And get rid of one "unused variable" warning.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
This commit is contained in:
David Brownell 2008-07-27 02:34:45 -07:00 committed by Haavard Skinnemoen
parent eda3d8f560
commit 3c26e17032
3 changed files with 33 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/avr32/boards/atstk1000/atstk1002.c
View File

@ -21,6 +21,8 @@
#include <asm/io.h>
#include <asm/setup.h>
#include <asm/atmel-mci.h>
#include <asm/arch/at32ap700x.h>
#include <asm/arch/board.h>
#include <asm/arch/init.h>
@ -260,6 +262,21 @@ void __init setup_board(void)
at32_setup_serial_console(0);
}
#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
/* MMC card detect requires MACB0 *NOT* be used */
#ifdef CONFIG_BOARD_ATSTK1002_SW6_CUSTOM
static struct mci_platform_data __initdata mci0_data = {
.detect_pin = GPIO_PIN_PC(14), /* gpio30/sdcd */
.wp_pin = GPIO_PIN_PC(15), /* gpio31/sdwp */
};
#define MCI_PDATA &mci0_data
#else
#define MCI_PDATA NULL
#endif /* SW6 for sd{cd,wp} routing */
#endif /* SW2 for MMC signal routing */
static int __init atstk1002_init(void)
{
/*
@ -309,7 +326,7 @@ static int __init atstk1002_init(void)
at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
#endif
#ifndef CONFIG_BOARD_ATSTK1002_SW2_CUSTOM
at32_add_device_mci(0, NULL);
at32_add_device_mci(0, MCI_PDATA);
#endif
#ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
set_hw_addr(at32_add_device_eth(1, &eth_data[1]));

13
arch/avr32/mach-at32ap/at32ap700x.c
View File

@ -12,6 +12,7 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/gpio.h>
#include <linux/spi/spi.h>
#include <linux/usb/atmel_usba_udc.h>
@ -1299,7 +1300,7 @@ at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
if (!data) {
data = &_data;
memset(data, 0, sizeof(struct mci_platform_data));
memset(data, -1, sizeof(struct mci_platform_data));
data->detect_pin = GPIO_PIN_NONE;
data->wp_pin = GPIO_PIN_NONE;
}
@ -1315,9 +1316,9 @@ at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
select_peripheral(PA(14), PERIPH_A, 0); /* DATA2 */
select_peripheral(PA(15), PERIPH_A, 0); /* DATA3 */
if (data->detect_pin != GPIO_PIN_NONE)
if (gpio_is_valid(data->detect_pin))
at32_select_gpio(data->detect_pin, 0);
if (data->wp_pin != GPIO_PIN_NONE)
if (gpio_is_valid(data->wp_pin))
at32_select_gpio(data->wp_pin, 0);
atmel_mci0_pclk.dev = &pdev->dev;
@ -1852,11 +1853,11 @@ at32_add_device_cf(unsigned int id, unsigned int extint,
if (at32_init_ide_or_cf(pdev, data->cs, extint))
goto fail;
if (data->detect_pin != GPIO_PIN_NONE)
if (gpio_is_valid(data->detect_pin))
at32_select_gpio(data->detect_pin, AT32_GPIOF_DEGLITCH);
if (data->reset_pin != GPIO_PIN_NONE)
if (gpio_is_valid(data->reset_pin))
at32_select_gpio(data->reset_pin, 0);
if (data->vcc_pin != GPIO_PIN_NONE)
if (gpio_is_valid(data->vcc_pin))
at32_select_gpio(data->vcc_pin, 0);
/* READY is used as extint, so we can't select it as gpio */

16
drivers/mmc/host/atmel-mci.c
View File

@ -12,6 +12,7 @@
#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
@ -28,7 +29,6 @@
#include <asm/unaligned.h>
#include <asm/arch/board.h>
#include <asm/arch/gpio.h>
#include "atmel-mci-regs.h"
@ -574,7 +574,7 @@ static int atmci_get_ro(struct mmc_host *mmc)
int read_only = 0;
struct atmel_mci *host = mmc_priv(mmc);
if (host->wp_pin >= 0) {
if (gpio_is_valid(host->wp_pin)) {
read_only = gpio_get_value(host->wp_pin);
dev_dbg(&mmc->class_dev, "card is %s\n",
read_only ? "read-only" : "read-write");
@ -636,7 +636,7 @@ static void atmci_detect_change(unsigned long data)
* been freed.
*/
smp_rmb();
if (host->detect_pin < 0)
if (!gpio_is_valid(host->detect_pin))
return;
enable_irq(gpio_to_irq(host->detect_pin));
@ -1051,7 +1051,7 @@ static int __init atmci_probe(struct platform_device *pdev)
/* Assume card is present if we don't have a detect pin */
host->present = 1;
if (host->detect_pin >= 0) {
if (gpio_is_valid(host->detect_pin)) {
if (gpio_request(host->detect_pin, "mmc_detect")) {
dev_dbg(&mmc->class_dev, "no detect pin available\n");
host->detect_pin = -1;
@ -1059,7 +1059,7 @@ static int __init atmci_probe(struct platform_device *pdev)
host->present = !gpio_get_value(host->detect_pin);
}
}
if (host->wp_pin >= 0) {
if (gpio_is_valid(host->wp_pin)) {
if (gpio_request(host->wp_pin, "mmc_wp")) {
dev_dbg(&mmc->class_dev, "no WP pin available\n");
host->wp_pin = -1;
@ -1070,7 +1070,7 @@ static int __init atmci_probe(struct platform_device *pdev)
mmc_add_host(mmc);
if (host->detect_pin >= 0) {
if (gpio_is_valid(host->detect_pin)) {
setup_timer(&host->detect_timer, atmci_detect_change,
(unsigned long)host);
@ -1113,7 +1113,7 @@ static int __exit atmci_remove(struct platform_device *pdev)
if (host) {
/* Debugfs stuff is cleaned up by mmc core */
if (host->detect_pin >= 0) {
if (gpio_is_valid(host->detect_pin)) {
int pin = host->detect_pin;
/* Make sure the timer doesn't enable the interrupt */
@ -1133,7 +1133,7 @@ static int __exit atmci_remove(struct platform_device *pdev)
mci_readl(host, SR);
clk_disable(host->mck);
if (host->wp_pin >= 0)
if (gpio_is_valid(host->wp_pin))
gpio_free(host->wp_pin);
free_irq(platform_get_irq(pdev, 0), host->mmc);