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Commit 477fbf1d authored by Alexander Shiyan's avatar Alexander Shiyan Committed by Shawn Guo
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ARM: i.MX: mx21ads: Replace direct handling of peripheral bits with GPIOs 

This patch replaces direct handling of peripheral bits with GPIOs by
using basic-mmio-gpio driver. As a result this change eliminate some
low-level code and removes custom io_map() from the board.
Signed-off-by: default avatarAlexander Shiyan <shc_work@mail.ru>
Acked-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
parent d1db0eea
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Showing with 66 additions and 70 deletions
arch/arm/mach-imx/mach-mx21ads.c
View file @ 477fbf1d
......@@ -17,51 +17,45 @@
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/physmap.h>
#include <linux/basic_mmio_gpio.h>
#include <linux/gpio.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <asm/mach/map.h>
#include "common.h"
#include "devices-imx21.h"
#include "hardware.h"
#include "iomux-mx21.h"
/*
* Memory-mapped I/O on MX21ADS base board
*/
#define MX21ADS_MMIO_BASE_ADDR 0xf5000000
#define MX21ADS_MMIO_SIZE 0xc00000
#define MX21ADS_REG_ADDR(offset) (void __force __iomem *) \
(MX21ADS_MMIO_BASE_ADDR + (offset))
#define MX21ADS_CS8900A_REG (MX21_CS1_BASE_ADDR + 0x000000)
#define MX21ADS_ST16C255_IOBASE_REG (MX21_CS1_BASE_ADDR + 0x200000)
#define MX21ADS_VERSION_REG (MX21_CS1_BASE_ADDR + 0x400000)
#define MX21ADS_IO_REG (MX21_CS1_BASE_ADDR + 0x800000)
#define MX21ADS_CS8900A_MMIO_SIZE 0x200000
#define MX21ADS_CS8900A_IRQ_GPIO IMX_GPIO_NR(5, 11)
#define MX21ADS_ST16C255_IOBASE_REG MX21ADS_REG_ADDR(0x200000)
#define MX21ADS_VERSION_REG MX21ADS_REG_ADDR(0x400000)
#define MX21ADS_IO_REG MX21ADS_REG_ADDR(0x800000)
#define MX21ADS_MMC_CD IMX_GPIO_NR(4, 25)
#define MX21ADS_CS8900A_IRQ_GPIO IMX_GPIO_NR(5, 11)
#define MX21ADS_MMGPIO_BASE (6 * 32)
/* MX21ADS_IO_REG bit definitions */
#define MX21ADS_IO_SD_WP 0x0001 /* read */
#define MX21ADS_IO_TP6 0x0001 /* write */
#define MX21ADS_IO_SW_SEL 0x0002 /* read */
#define MX21ADS_IO_TP7 0x0002 /* write */
#define MX21ADS_IO_RESET_E_UART 0x0004
#define MX21ADS_IO_RESET_BASE 0x0008
#define MX21ADS_IO_CSI_CTL2 0x0010
#define MX21ADS_IO_CSI_CTL1 0x0020
#define MX21ADS_IO_CSI_CTL0 0x0040
#define MX21ADS_IO_UART1_EN 0x0080
#define MX21ADS_IO_UART4_EN 0x0100
#define MX21ADS_IO_LCDON 0x0200
#define MX21ADS_IO_IRDA_EN 0x0400
#define MX21ADS_IO_IRDA_FIR_SEL 0x0800
#define MX21ADS_IO_IRDA_MD0_B 0x1000
#define MX21ADS_IO_IRDA_MD1 0x2000
#define MX21ADS_IO_LED4_ON 0x4000
#define MX21ADS_IO_LED3_ON 0x8000
#define MX21ADS_IO_SD_WP (MX21ADS_MMGPIO_BASE + 0)
#define MX21ADS_IO_TP6 (MX21ADS_IO_SD_WP)
#define MX21ADS_IO_SW_SEL (MX21ADS_MMGPIO_BASE + 1)
#define MX21ADS_IO_TP7 (MX21ADS_IO_SW_SEL)
#define MX21ADS_IO_RESET_E_UART (MX21ADS_MMGPIO_BASE + 2)
#define MX21ADS_IO_RESET_BASE (MX21ADS_MMGPIO_BASE + 3)
#define MX21ADS_IO_CSI_CTL2 (MX21ADS_MMGPIO_BASE + 4)
#define MX21ADS_IO_CSI_CTL1 (MX21ADS_MMGPIO_BASE + 5)
#define MX21ADS_IO_CSI_CTL0 (MX21ADS_MMGPIO_BASE + 6)
#define MX21ADS_IO_UART1_EN (MX21ADS_MMGPIO_BASE + 7)
#define MX21ADS_IO_UART4_EN (MX21ADS_MMGPIO_BASE + 8)
#define MX21ADS_IO_LCDON (MX21ADS_MMGPIO_BASE + 9)
#define MX21ADS_IO_IRDA_EN (MX21ADS_MMGPIO_BASE + 10)
#define MX21ADS_IO_IRDA_FIR_SEL (MX21ADS_MMGPIO_BASE + 11)
#define MX21ADS_IO_IRDA_MD0_B (MX21ADS_MMGPIO_BASE + 12)
#define MX21ADS_IO_IRDA_MD1 (MX21ADS_MMGPIO_BASE + 13)
#define MX21ADS_IO_LED4_ON (MX21ADS_MMGPIO_BASE + 14)
#define MX21ADS_IO_LED3_ON (MX21ADS_MMGPIO_BASE + 15)
static const int mx21ads_pins[] __initconst = {
......@@ -160,7 +154,7 @@ static struct platform_device mx21ads_nor_mtd_device = {
};
static struct resource mx21ads_cs8900_resources[] __initdata = {
DEFINE_RES_MEM(MX21_CS1_BASE_ADDR, MX21ADS_CS8900A_MMIO_SIZE),
DEFINE_RES_MEM(MX21_CS1_BASE_ADDR, SZ_1K),
/* irq number is run-time assigned */
DEFINE_RES_IRQ(-1),
};
......@@ -179,23 +173,39 @@ static const struct imxuart_platform_data uart_pdata_rts __initconst = {
static const struct imxuart_platform_data uart_pdata_norts __initconst = {
};
static struct resource mx21ads_mmgpio_resource =
DEFINE_RES_MEM_NAMED(MX21ADS_IO_REG, SZ_2, "dat");
static struct bgpio_pdata mx21ads_mmgpio_pdata = {
.base = MX21ADS_MMGPIO_BASE,
.ngpio = 16,
};
static struct platform_device mx21ads_mmgpio = {
.name = "basic-mmio-gpio",
.id = PLATFORM_DEVID_AUTO,
.resource = &mx21ads_mmgpio_resource,
.num_resources = 1,
.dev = {
.platform_data = &mx21ads_mmgpio_pdata,
},
};
static int mx21ads_fb_init(struct platform_device *pdev)
{
u16 tmp;
int ret;
tmp = __raw_readw(MX21ADS_IO_REG);
tmp |= MX21ADS_IO_LCDON;
__raw_writew(tmp, MX21ADS_IO_REG);
return 0;
ret = gpio_request(MX21ADS_IO_LCDON, "fb-lcdon");
if (ret)
return ret;
return gpio_direction_output(MX21ADS_IO_LCDON, 1);
}
static void mx21ads_fb_exit(struct platform_device *pdev)
{
u16 tmp;
tmp = __raw_readw(MX21ADS_IO_REG);
tmp &= ~MX21ADS_IO_LCDON;
__raw_writew(tmp, MX21ADS_IO_REG);
gpio_set_value(MX21ADS_IO_LCDON, 0);
gpio_free(MX21ADS_IO_LCDON);
}
/*
......@@ -236,19 +246,26 @@ static const struct imx_fb_platform_data mx21ads_fb_data __initconst = {
static int mx21ads_sdhc_get_ro(struct device *dev)
{
return (__raw_readw(MX21ADS_IO_REG) & MX21ADS_IO_SD_WP) ? 1 : 0;
return gpio_get_value(MX21ADS_IO_SD_WP);
}
static int mx21ads_sdhc_init(struct device *dev, irq_handler_t detect_irq,
void *data)
{
return request_irq(gpio_to_irq(IMX_GPIO_NR(4, 25)), detect_irq,
IRQF_TRIGGER_FALLING, "mmc-detect", data);
int ret;
ret = gpio_request(MX21ADS_IO_SD_WP, "mmc-ro");
if (ret)
return ret;
return request_irq(gpio_to_irq(MX21ADS_MMC_CD), detect_irq,
IRQF_TRIGGER_FALLING, "mmc-detect", data);
}
static void mx21ads_sdhc_exit(struct device *dev, void *data)
{
free_irq(gpio_to_irq(IMX_GPIO_NR(4, 25)), data);
free_irq(gpio_to_irq(MX21ADS_MMC_CD), data);
gpio_free(MX21ADS_IO_SD_WP);
}
static const struct imxmmc_platform_data mx21ads_sdhc_pdata __initconst = {
......@@ -264,29 +281,8 @@ mx21ads_nand_board_info __initconst = {
.hw_ecc = 1,
};
static struct map_desc mx21ads_io_desc[] __initdata = {
/*
* Memory-mapped I/O on MX21ADS Base board:
* - CS8900A Ethernet controller
* - ST16C2552CJ UART
* - CPU and Base board version
* - Base board I/O register
*/
{
.virtual = MX21ADS_MMIO_BASE_ADDR,
.pfn = __phys_to_pfn(MX21_CS1_BASE_ADDR),
.length = MX21ADS_MMIO_SIZE,
.type = MT_DEVICE,
},
};
static void __init mx21ads_map_io(void)
{
mx21_map_io();
iotable_init(mx21ads_io_desc, ARRAY_SIZE(mx21ads_io_desc));
}
static struct platform_device *platform_devices[] __initdata = {
&mx21ads_mmgpio,
&mx21ads_nor_mtd_device,
};
......@@ -321,7 +317,7 @@ static void __init mx21ads_timer_init(void)
MACHINE_START(MX21ADS, "Freescale i.MX21ADS")
/* maintainer: Freescale Semiconductor, Inc. */
.atag_offset = 0x100,
.map_io = mx21ads_map_io,
.map_io = mx21_map_io,
.init_early = imx21_init_early,
.init_irq = mx21_init_irq,
.handle_irq = imx21_handle_irq,
......
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