arch/arm/mach-pxa/pcm990-baseboard.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  arch/arm/mach-pxa/pcm990-baseboard.c
 *  Support for the Phytec phyCORE-PXA270 Development Platform (PCM-990).
 *
 *  Refer
 *   http://www.phytec.com/products/rdk/ARM-XScale/phyCORE-XScale-PXA270.html
 *  for additional hardware info
 *
 *  Author:	Juergen Kilb
 *  Created:	April 05, 2005
 *  Copyright:	Phytec Messtechnik GmbH
 *  e-Mail:	armlinux@phytec.de
 *
 *  based on Intel Mainstone Board
 *
 *  Copyright 2007 Juergen Beisert @ Pengutronix (j.beisert@pengutronix.de)
 */
#include <linux/gpio.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/platform_data/i2c-pxa.h>
#include <linux/pwm.h>
#include <linux/pwm_backlight.h>

#include <asm/mach/map.h>
#include "pxa27x.h"
#include <linux/platform_data/asoc-pxa.h>
#include <linux/platform_data/mmc-pxamci.h>
#include <linux/platform_data/usb-ohci-pxa27x.h>
#include "pcm990_baseboard.h"
#include <linux/platform_data/video-pxafb.h>

#include "devices.h"
#include "generic.h"

static unsigned long pcm990_pin_config[] __initdata = {
	/* MMC */
	GPIO32_MMC_CLK,
	GPIO112_MMC_CMD,
	GPIO92_MMC_DAT_0,
	GPIO109_MMC_DAT_1,
	GPIO110_MMC_DAT_2,
	GPIO111_MMC_DAT_3,
	/* USB */
	GPIO88_USBH1_PWR,
	GPIO89_USBH1_PEN,
	/* PWM0 */
	GPIO16_PWM0_OUT,

	/* I2C */
	GPIO117_I2C_SCL,
	GPIO118_I2C_SDA,

	/* AC97 */
	GPIO28_AC97_BITCLK,
	GPIO29_AC97_SDATA_IN_0,
	GPIO30_AC97_SDATA_OUT,
	GPIO31_AC97_SYNC,
};

static void __iomem *pcm990_cpld_base;

static u8 pcm990_cpld_readb(unsigned int reg)
{
	return readb(pcm990_cpld_base + reg);
}

static void pcm990_cpld_writeb(u8 value, unsigned int reg)
{
	writeb(value, pcm990_cpld_base + reg);
}

/*
 * pcm990_lcd_power - control power supply to the LCD
 * @on: 0 = switch off, 1 = switch on
 *
 * Called by the pxafb driver
 */
#ifndef CONFIG_PCM990_DISPLAY_NONE
static void pcm990_lcd_power(int on, struct fb_var_screeninfo *var)
{
	if (on) {
		/* enable LCD-Latches
		 * power on LCD
		 */
		pcm990_cpld_writeb(PCM990_CTRL_LCDPWR + PCM990_CTRL_LCDON,
				PCM990_CTRL_REG3);
	} else {
		/* disable LCD-Latches
		 * power off LCD
		 */
		pcm990_cpld_writeb(0, PCM990_CTRL_REG3);
	}
}
#endif

#if defined(CONFIG_PCM990_DISPLAY_SHARP)
static struct pxafb_mode_info fb_info_sharp_lq084v1dg21 = {
	.pixclock		= 28000,
	.xres			= 640,
	.yres			= 480,
	.bpp			= 16,
	.hsync_len		= 20,
	.left_margin		= 103,
	.right_margin		= 47,
	.vsync_len		= 6,
	.upper_margin		= 28,
	.lower_margin		= 5,
	.sync			= 0,
	.cmap_greyscale		= 0,
};

static struct pxafb_mach_info pcm990_fbinfo __initdata = {
	.modes			= &fb_info_sharp_lq084v1dg21,
	.num_modes		= 1,
	.lcd_conn		= LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
	.pxafb_lcd_power	= pcm990_lcd_power,
};
#elif defined(CONFIG_PCM990_DISPLAY_NEC)
struct pxafb_mode_info fb_info_nec_nl6448bc20_18d = {
	.pixclock		= 39720,
	.xres			= 640,
	.yres			= 480,
	.bpp			= 16,
	.hsync_len		= 32,
	.left_margin		= 16,
	.right_margin		= 48,
	.vsync_len		= 2,
	.upper_margin		= 12,
	.lower_margin		= 17,
	.sync			= 0,
	.cmap_greyscale		= 0,
};

static struct pxafb_mach_info pcm990_fbinfo __initdata = {
	.modes			= &fb_info_nec_nl6448bc20_18d,
	.num_modes		= 1,
	.lcd_conn		= LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
	.pxafb_lcd_power	= pcm990_lcd_power,
};
#endif

static struct pwm_lookup pcm990_pwm_lookup[] = {
	PWM_LOOKUP("pxa27x-pwm.0", 0, "pwm-backlight.0", NULL, 78770,
		   PWM_POLARITY_NORMAL),
};

static struct platform_pwm_backlight_data pcm990_backlight_data = {
	.max_brightness	= 1023,
	.dft_brightness	= 1023,
};

static struct platform_device pcm990_backlight_device = {
	.name		= "pwm-backlight",
	.dev		= {
		.parent = &pxa27x_device_pwm0.dev,
		.platform_data = &pcm990_backlight_data,
	},
};

/*
 * The PCM-990 development baseboard uses PCM-027's hardware in the
 * following way:
 *
 * - LCD support is in use
 *  - GPIO16 is output for back light on/off with PWM
 *  - GPIO58 ... GPIO73 are outputs for display data
 *  - GPIO74 is output output for LCDFCLK
 *  - GPIO75 is output for LCDLCLK
 *  - GPIO76 is output for LCDPCLK
 *  - GPIO77 is output for LCDBIAS
 * - MMC support is in use
 *  - GPIO32 is output for MMCCLK
 *  - GPIO92 is MMDAT0
 *  - GPIO109 is MMDAT1
 *  - GPIO110 is MMCS0
 *  - GPIO111 is MMCS1
 *  - GPIO112 is MMCMD
 * - IDE/CF card is in use
 *  - GPIO48 is output /POE
 *  - GPIO49 is output /PWE
 *  - GPIO50 is output /PIOR
 *  - GPIO51 is output /PIOW
 *  - GPIO54 is output /PCE2
 *  - GPIO55 is output /PREG
 *  - GPIO56 is input /PWAIT
 *  - GPIO57 is output /PIOS16
 *  - GPIO79 is output PSKTSEL
 *  - GPIO85 is output /PCE1
 * - FFUART is in use
 *  - GPIO34 is input FFRXD
 *  - GPIO35 is input FFCTS
 *  - GPIO36 is input FFDCD
 *  - GPIO37 is input FFDSR
 *  - GPIO38 is input FFRI
 *  - GPIO39 is output FFTXD
 *  - GPIO40 is output FFDTR
 *  - GPIO41 is output FFRTS
 * - BTUART is in use
 *  - GPIO42 is input BTRXD
 *  - GPIO43 is output BTTXD
 *  - GPIO44 is input BTCTS
 *  - GPIO45 is output BTRTS
 * - IRUART is in use
 *  - GPIO46 is input STDRXD
 *  - GPIO47 is output STDTXD
 * - AC97 is in use*)
 *  - GPIO28 is input AC97CLK
 *  - GPIO29 is input AC97DatIn
 *  - GPIO30 is output AC97DatO
 *  - GPIO31 is output AC97SYNC
 *  - GPIO113 is output AC97_RESET
 * - SSP is in use
 *  - GPIO23 is output SSPSCLK
 *  - GPIO24 is output chip select to Max7301
 *  - GPIO25 is output SSPTXD
 *  - GPIO26 is input SSPRXD
 *  - GPIO27 is input for Max7301 IRQ
 *  - GPIO53 is input SSPSYSCLK
 * - SSP3 is in use
 *  - GPIO81 is output SSPTXD3
 *  - GPIO82 is input SSPRXD3
 *  - GPIO83 is output SSPSFRM
 *  - GPIO84 is output SSPCLK3
 *
 * Otherwise claimed GPIOs:
 * GPIO1 -> IRQ from user switch
 * GPIO9 -> IRQ from power management
 * GPIO10 -> IRQ from WML9712 AC97 controller
 * GPIO11 -> IRQ from IDE controller
 * GPIO12 -> IRQ from CF controller
 * GPIO13 -> IRQ from CF controller
 * GPIO14 -> GPIO free
 * GPIO15 -> /CS1 selects baseboard's Control CPLD (U7, 16 bit wide data path)
 * GPIO19 -> GPIO free
 * GPIO20 -> /SDCS2
 * GPIO21 -> /CS3 PC card socket select
 * GPIO33 -> /CS5  network controller select
 * GPIO78 -> /CS2  (16 bit wide data path)
 * GPIO80 -> /CS4  (16 bit wide data path)
 * GPIO86 -> GPIO free
 * GPIO87 -> GPIO free
 * GPIO90 -> LED0 on CPU module
 * GPIO91 -> LED1 on CPI module
 * GPIO117 -> SCL
 * GPIO118 -> SDA
 */

static unsigned long pcm990_irq_enabled;

static void pcm990_mask_ack_irq(struct irq_data *d)
{
	int pcm990_irq = (d->irq - PCM027_IRQ(0));

	pcm990_irq_enabled &= ~(1 << pcm990_irq);

	pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
}

static void pcm990_unmask_irq(struct irq_data *d)
{
	int pcm990_irq = (d->irq - PCM027_IRQ(0));
	u8 val;

	/* the irq can be acknowledged only if deasserted, so it's done here */

	pcm990_irq_enabled |= (1 << pcm990_irq);

	val = pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
	val |= 1 << pcm990_irq;
	pcm990_cpld_writeb(val, PCM990_CTRL_INTSETCLR);

	pcm990_cpld_writeb(pcm990_irq_enabled, PCM990_CTRL_INTMSKENA);
}

static struct irq_chip pcm990_irq_chip = {
	.irq_mask_ack	= pcm990_mask_ack_irq,
	.irq_unmask	= pcm990_unmask_irq,
};

static void pcm990_irq_handler(struct irq_desc *desc)
{
	unsigned int irq;
	unsigned long pending;

	pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
	pending &= pcm990_irq_enabled;

	do {
		/* clear our parent IRQ */
		desc->irq_data.chip->irq_ack(&desc->irq_data);
		if (likely(pending)) {
			irq = PCM027_IRQ(0) + __ffs(pending);
			generic_handle_irq(irq);
		}
		pending = ~pcm990_cpld_readb(PCM990_CTRL_INTSETCLR);
		pending &= pcm990_irq_enabled;
	} while (pending);
}

static void __init pcm990_init_irq(void)
{
	int irq;

	/* setup extra PCM990 irqs */
	for (irq = PCM027_IRQ(0); irq <= PCM027_IRQ(3); irq++) {
		irq_set_chip_and_handler(irq, &pcm990_irq_chip,
					 handle_level_irq);
		irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
	}

	/* disable all Interrupts */
	pcm990_cpld_writeb(0x0, PCM990_CTRL_INTMSKENA);
	pcm990_cpld_writeb(0xff, PCM990_CTRL_INTSETCLR);

	irq_set_chained_handler(PCM990_CTRL_INT_IRQ, pcm990_irq_handler);
	irq_set_irq_type(PCM990_CTRL_INT_IRQ, PCM990_CTRL_INT_IRQ_EDGE);
}

static int pcm990_mci_init(struct device *dev, irq_handler_t mci_detect_int,
			void *data)
{
	int err;

	err = request_irq(PCM027_MMCDET_IRQ, mci_detect_int, 0,
			     "MMC card detect", data);
	if (err)
		printk(KERN_ERR "pcm990_mci_init: MMC/SD: can't request MMC "
				"card detect IRQ\n");

	return err;
}

static int pcm990_mci_setpower(struct device *dev, unsigned int vdd)
{
	struct pxamci_platform_data *p_d = dev->platform_data;
	u8 val;

	val = pcm990_cpld_readb(PCM990_CTRL_REG5);

	if ((1 << vdd) & p_d->ocr_mask)
		val |= PCM990_CTRL_MMC2PWR;
	else
		val &= ~PCM990_CTRL_MMC2PWR;

	pcm990_cpld_writeb(PCM990_CTRL_MMC2PWR, PCM990_CTRL_REG5);
	return 0;
}

static void pcm990_mci_exit(struct device *dev, void *data)
{
	free_irq(PCM027_MMCDET_IRQ, data);
}

#define MSECS_PER_JIFFY (1000/HZ)

static struct pxamci_platform_data pcm990_mci_platform_data = {
	.detect_delay_ms	= 250,
	.ocr_mask		= MMC_VDD_32_33 | MMC_VDD_33_34,
	.init 			= pcm990_mci_init,
	.setpower 		= pcm990_mci_setpower,
	.exit			= pcm990_mci_exit,
};

static struct pxaohci_platform_data pcm990_ohci_platform_data = {
	.port_mode	= PMM_PERPORT_MODE,
	.flags		= ENABLE_PORT1 | POWER_CONTROL_LOW | POWER_SENSE_LOW,
	.power_on_delay	= 10,
};

/*
 * system init for baseboard usage. Will be called by pcm027 init.
 *
 * Add platform devices present on this baseboard and init
 * them from CPU side as far as required to use them later on
 */
void __init pcm990_baseboard_init(void)
{
	pxa2xx_mfp_config(ARRAY_AND_SIZE(pcm990_pin_config));

	pcm990_cpld_base = ioremap(PCM990_CTRL_PHYS, PCM990_CTRL_SIZE);
	if (!pcm990_cpld_base) {
		pr_err("pcm990: failed to ioremap cpld\n");
		return;
	}

	/* register CPLD's IRQ controller */
	pcm990_init_irq();

#ifndef CONFIG_PCM990_DISPLAY_NONE
	pxa_set_fb_info(NULL, &pcm990_fbinfo);
#endif
	pwm_add_table(pcm990_pwm_lookup, ARRAY_SIZE(pcm990_pwm_lookup));
	platform_device_register(&pcm990_backlight_device);

	/* MMC */
	pxa_set_mci_info(&pcm990_mci_platform_data);

	/* USB host */
	pxa_set_ohci_info(&pcm990_ohci_platform_data);

	pxa_set_i2c_info(NULL);
	pxa_set_ac97_info(NULL);

	printk(KERN_INFO "PCM-990 Evaluation baseboard initialized\n");
}