WSL2-Linux-Kernel/arch/arm/mach-mmp/gplugd.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  linux/arch/arm/mach-mmp/gplugd.c
 *
 *  Support for the Marvell PXA168-based GuruPlug Display (gplugD) Platform.
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/gpio-pxa.h>

#include <asm/mach/arch.h>
#include <asm/mach-types.h>

#include "irqs.h"
#include "pxa168.h"
#include "mfp-pxa168.h"

#include "common.h"

static unsigned long gplugd_pin_config[] __initdata = {
	/* UART3 */
	GPIO8_UART3_TXD,
	GPIO9_UART3_RXD,
	GPIO1O_UART3_CTS,
	GPIO11_UART3_RTS,

	/* USB OTG PEN */
	GPIO18_GPIO,

	/* MMC2 */
	GPIO28_MMC2_CMD,
	GPIO29_MMC2_CLK,
	GPIO30_MMC2_DAT0,
	GPIO31_MMC2_DAT1,
	GPIO32_MMC2_DAT2,
	GPIO33_MMC2_DAT3,

	/* LCD & HDMI clock selection GPIO: 0: 74.176MHz, 1: 74.25 MHz */
	GPIO35_GPIO,
	GPIO36_GPIO, /* CEC Interrupt */

	/* MMC1 */
	GPIO43_MMC1_CLK,
	GPIO49_MMC1_CMD,
	GPIO41_MMC1_DAT0,
	GPIO40_MMC1_DAT1,
	GPIO52_MMC1_DAT2,
	GPIO51_MMC1_DAT3,
	GPIO53_MMC1_CD,

	/* LCD */
	GPIO56_LCD_FCLK_RD,
	GPIO57_LCD_LCLK_A0,
	GPIO58_LCD_PCLK_WR,
	GPIO59_LCD_DENA_BIAS,
	GPIO60_LCD_DD0,
	GPIO61_LCD_DD1,
	GPIO62_LCD_DD2,
	GPIO63_LCD_DD3,
	GPIO64_LCD_DD4,
	GPIO65_LCD_DD5,
	GPIO66_LCD_DD6,
	GPIO67_LCD_DD7,
	GPIO68_LCD_DD8,
	GPIO69_LCD_DD9,
	GPIO70_LCD_DD10,
	GPIO71_LCD_DD11,
	GPIO72_LCD_DD12,
	GPIO73_LCD_DD13,
	GPIO74_LCD_DD14,
	GPIO75_LCD_DD15,
	GPIO76_LCD_DD16,
	GPIO77_LCD_DD17,
	GPIO78_LCD_DD18,
	GPIO79_LCD_DD19,
	GPIO80_LCD_DD20,
	GPIO81_LCD_DD21,
	GPIO82_LCD_DD22,
	GPIO83_LCD_DD23,

	/* GPIO */
	GPIO84_GPIO,
	GPIO85_GPIO,

	/* Fast-Ethernet*/
	GPIO86_TX_CLK,
	GPIO87_TX_EN,
	GPIO88_TX_DQ3,
	GPIO89_TX_DQ2,
	GPIO90_TX_DQ1,
	GPIO91_TX_DQ0,
	GPIO92_MII_CRS,
	GPIO93_MII_COL,
	GPIO94_RX_CLK,
	GPIO95_RX_ER,
	GPIO96_RX_DQ3,
	GPIO97_RX_DQ2,
	GPIO98_RX_DQ1,
	GPIO99_RX_DQ0,
	GPIO100_MII_MDC,
	GPIO101_MII_MDIO,
	GPIO103_RX_DV,
	GPIO104_GPIO,     /* Reset PHY */

	/* RTC interrupt */
	GPIO102_GPIO,

	/* I2C */
	GPIO105_CI2C_SDA,
	GPIO106_CI2C_SCL,

	/* SPI NOR Flash on SSP2 */
	GPIO107_SSP2_RXD,
	GPIO108_SSP2_TXD,
	GPIO110_GPIO,     /* SPI_CSn */
	GPIO111_SSP2_CLK,

	/* Select JTAG */
	GPIO109_GPIO,

	/* I2S */
	GPIO114_I2S_FRM,
	GPIO115_I2S_BCLK,
	GPIO116_I2S_TXD
};

static struct pxa_gpio_platform_data pxa168_gpio_pdata = {
	.irq_base	= MMP_GPIO_TO_IRQ(0),
};

static struct i2c_board_info gplugd_i2c_board_info[] = {
	{
		.type = "isl1208",
		.addr = 0x6F,
	}
};

/* Bring PHY out of reset by setting GPIO 104 */
static int gplugd_eth_init(void)
{
	if (unlikely(gpio_request(104, "ETH_RESET_N"))) {
		printk(KERN_ERR "Can't get hold of GPIO 104 to bring Ethernet "
				"PHY out of reset\n");
		return -EIO;
	}

	gpio_direction_output(104, 1);
	gpio_free(104);
	return 0;
}

struct pxa168_eth_platform_data gplugd_eth_platform_data = {
	.port_number = 0,
	.phy_addr    = 0,
	.speed       = 0, /* Autonagotiation */
	.intf        = PHY_INTERFACE_MODE_RMII,
	.init        = gplugd_eth_init,
};

static void __init select_disp_freq(void)
{
	/* set GPIO 35 & clear GPIO 85 to set LCD External Clock to 74.25 MHz */
	if (unlikely(gpio_request(35, "DISP_FREQ_SEL"))) {
		printk(KERN_ERR "Can't get hold of GPIO 35 to select display "
				"frequency\n");
	} else {
		gpio_direction_output(35, 1);
		gpio_free(35);
	}

	if (unlikely(gpio_request(85, "DISP_FREQ_SEL_2"))) {
		printk(KERN_ERR "Can't get hold of GPIO 85 to select display "
				"frequency\n");
	} else {
		gpio_direction_output(85, 0);
		gpio_free(85);
	}
}

static void __init gplugd_init(void)
{
	mfp_config(ARRAY_AND_SIZE(gplugd_pin_config));

	select_disp_freq();

	/* on-chip devices */
	pxa168_add_uart(3);
	pxa168_add_ssp(1);
	pxa168_add_twsi(0, NULL, ARRAY_AND_SIZE(gplugd_i2c_board_info));
	platform_device_add_data(&pxa168_device_gpio, &pxa168_gpio_pdata,
				 sizeof(struct pxa_gpio_platform_data));
	platform_device_register(&pxa168_device_gpio);

	pxa168_add_eth(&gplugd_eth_platform_data);
}

MACHINE_START(GPLUGD, "PXA168-based GuruPlug Display (gplugD) Platform")
	.map_io		= mmp_map_io,
	.nr_irqs	= MMP_NR_IRQS,
	.init_irq       = pxa168_init_irq,
	.init_time	= pxa168_timer_init,
	.init_machine   = gplugd_init,
	.restart	= pxa168_restart,
MACHINE_END