h3600.c

优龙2410linux2.6.8内核源代码

/*
 * Hardware definitions for Compaq iPAQ H3xxx Handheld Computers
 *
 * Copyright 2000,1 Compaq Computer Corporation.
 *
 * Use consistent with the GNU GPL is permitted,
 * provided that this copyright notice is
 * preserved in its entirety in all copies and derived works.
 *
 * COMPAQ COMPUTER CORPORATION MAKES NO WARRANTIES, EXPRESSED OR IMPLIED,
 * AS TO THE USEFULNESS OR CORRECTNESS OF THIS CODE OR ITS
 * FITNESS FOR ANY PARTICULAR PURPOSE.
 *
 * Author: Jamey Hicks.
 *
 * History:
 *
 * 2001-10-??	Andrew Christian   Added support for iPAQ H3800
 *				   and abstracted EGPIO interface.
 *
 */
#include <linux/config.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/pm.h>
#include <linux/serial_core.h>

#include <asm/irq.h>
#include <asm/hardware.h>
#include <asm/mach-types.h>
#include <asm/setup.h>

#include <asm/mach/irq.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/serial_sa1100.h>

#include <asm/arch/h3600.h>

#if defined (CONFIG_SA1100_H3600) || defined (CONFIG_SA1100_H3100)
#include <asm/arch/h3600_gpio.h>
#endif

#ifdef CONFIG_SA1100_H3800
#include <asm/arch/h3600_asic.h>
#endif

#include "generic.h"

struct ipaq_model_ops ipaq_model_ops;
EXPORT_SYMBOL(ipaq_model_ops);

/*
 * low-level UART features
 */

static void h3600_uart_set_mctrl(struct uart_port *port, u_int mctrl)
{
	if (port->mapbase == _Ser3UTCR0) {
		if (mctrl & TIOCM_RTS)
			GPCR = GPIO_H3600_COM_RTS;
		else
			GPSR = GPIO_H3600_COM_RTS;
	}
}

static u_int h3600_uart_get_mctrl(struct uart_port *port)
{
	u_int ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR;

	if (port->mapbase == _Ser3UTCR0) {
		int gplr = GPLR;
		/* DCD and CTS bits are inverted in GPLR by RS232 transceiver */
		if (gplr & GPIO_H3600_COM_DCD)
			ret &= ~TIOCM_CD;
		if (gplr & GPIO_H3600_COM_CTS)
			ret &= ~TIOCM_CTS;
	}

	return ret;
}

static void h3600_uart_pm(struct uart_port *port, u_int state, u_int oldstate)
{
	if (port->mapbase == _Ser2UTCR0) { /* TODO: REMOVE THIS */
		assign_h3600_egpio(IPAQ_EGPIO_IR_ON, !state);
	} else if (port->mapbase == _Ser3UTCR0) {
		assign_h3600_egpio(IPAQ_EGPIO_RS232_ON, !state);
	}
}

/*
 * Enable/Disable wake up events for this serial port.
 * Obviously, we only support this on the normal COM port.
 */
static int h3600_uart_set_wake(struct uart_port *port, u_int enable)
{
	int err = -EINVAL;

	if (port->mapbase == _Ser3UTCR0) {
		if (enable)
			PWER |= PWER_GPIO23 | PWER_GPIO25; /* DCD and CTS */
		else
			PWER &= ~(PWER_GPIO23 | PWER_GPIO25); /* DCD and CTS */
		err = 0;
	}
	return err;
}

static struct sa1100_port_fns h3600_port_fns __initdata = {
	.set_mctrl	= h3600_uart_set_mctrl,
	.get_mctrl	= h3600_uart_get_mctrl,
	.pm		= h3600_uart_pm,
	.set_wake	= h3600_uart_set_wake,
};

/*
 * helper for sa1100fb
 */
static void h3xxx_lcd_power(int enable)
{
	assign_h3600_egpio(IPAQ_EGPIO_LCD_POWER, enable);
}

static struct map_desc h3600_io_desc[] __initdata = {
 /* virtual	       physical 	  length      type */
  { H3600_BANK_2_VIRT, SA1100_CS2_PHYS,   0x02800000, MT_DEVICE }, /* static memory bank 2  CS#2 */
  { H3600_BANK_4_VIRT, SA1100_CS4_PHYS,   0x00800000, MT_DEVICE }, /* static memory bank 4  CS#4 */
  { H3600_EGPIO_VIRT,  H3600_EGPIO_PHYS,  0x01000000, MT_DEVICE }, /* EGPIO 0		CS#5 */
};

/*
 * Common map_io initialization
 */

static void __init h3xxx_map_io(void)
{
	sa1100_map_io();
	iotable_init(h3600_io_desc, ARRAY_SIZE(h3600_io_desc));

	sa1100_register_uart_fns(&h3600_port_fns);
	sa1100_register_uart(0, 3); /* Common serial port */
//	sa1100_register_uart(1, 1); /* Microcontroller on 3100/3600 */

	/* Ensure those pins are outputs and driving low  */
	PPDR |= PPC_TXD4 | PPC_SCLK | PPC_SFRM;
	PPSR &= ~(PPC_TXD4 | PPC_SCLK | PPC_SFRM);

	/* Configure suspend conditions */
	PGSR = 0;
	PWER = PWER_GPIO0 | PWER_RTC;
	PCFR = PCFR_OPDE;
	PSDR = 0;

	sa1100fb_lcd_power = h3xxx_lcd_power;
}

static __inline__ void do_blank(int setp)
{
	if (ipaq_model_ops.blank_callback)
		ipaq_model_ops.blank_callback(1-setp);
}

/************************* H3100 *************************/

#ifdef CONFIG_SA1100_H3100

#define H3100_EGPIO	(*(volatile unsigned int *)H3600_EGPIO_VIRT)
static unsigned int h3100_egpio = 0;

static void h3100_control_egpio(enum ipaq_egpio_type x, int setp)
{
	unsigned int egpio = 0;
	long	     gpio = 0;
	unsigned long flags;

	switch (x) {
	case IPAQ_EGPIO_LCD_POWER:
		egpio |= EGPIO_H3600_LCD_ON;
		gpio  |= GPIO_H3100_LCD_3V_ON;
		do_blank(setp);
		break;
	case IPAQ_EGPIO_LCD_ENABLE:
		break;
	case IPAQ_EGPIO_CODEC_NRESET:
		egpio |= EGPIO_H3600_CODEC_NRESET;
		break;
	case IPAQ_EGPIO_AUDIO_ON:
		gpio |= GPIO_H3100_AUD_PWR_ON
			| GPIO_H3100_AUD_ON;
		break;
	case IPAQ_EGPIO_QMUTE:
		gpio |= GPIO_H3100_QMUTE;
		break;
	case IPAQ_EGPIO_OPT_NVRAM_ON:
		egpio |= EGPIO_H3600_OPT_NVRAM_ON;
		break;
	case IPAQ_EGPIO_OPT_ON:
		egpio |= EGPIO_H3600_OPT_ON;
		break;
	case IPAQ_EGPIO_CARD_RESET:
		egpio |= EGPIO_H3600_CARD_RESET;
		break;
	case IPAQ_EGPIO_OPT_RESET:
		egpio |= EGPIO_H3600_OPT_RESET;
		break;
	case IPAQ_EGPIO_IR_ON:
		gpio |= GPIO_H3100_IR_ON;
		break;
	case IPAQ_EGPIO_IR_FSEL:
		gpio |= GPIO_H3100_IR_FSEL;
		break;
	case IPAQ_EGPIO_RS232_ON:
		egpio |= EGPIO_H3600_RS232_ON;
		break;
	case IPAQ_EGPIO_VPP_ON:
		egpio |= EGPIO_H3600_VPP_ON;
		break;
	}

	if (egpio || gpio) {
		local_irq_save(flags);
		if (setp) {
			h3100_egpio |= egpio;
			GPSR = gpio;
		} else {
			h3100_egpio &= ~egpio;
			GPCR = gpio;
		}
		H3100_EGPIO = h3100_egpio;
		local_irq_restore(flags);
	}
}

static unsigned long h3100_read_egpio(void)
{
	return h3100_egpio;
}

static int h3100_pm_callback(int req)
{
	if (ipaq_model_ops.pm_callback_aux)
		return ipaq_model_ops.pm_callback_aux(req);
	return 0;
}

static struct ipaq_model_ops h3100_model_ops __initdata = {
	.generic_name	= "3100",
	.control	= h3100_control_egpio,
	.read		= h3100_read_egpio,
	.pm_callback	= h3100_pm_callback
};

#define H3100_DIRECT_EGPIO (GPIO_H3100_BT_ON	  \
			  | GPIO_H3100_GPIO3	  \
			  | GPIO_H3100_QMUTE	  \
			  | GPIO_H3100_LCD_3V_ON  \
			  | GPIO_H3100_AUD_ON	  \
			  | GPIO_H3100_AUD_PWR_ON \
			  | GPIO_H3100_IR_ON	  \
			  | GPIO_H3100_IR_FSEL)

static void __init h3100_map_io(void)
{
	h3xxx_map_io();

	/* Initialize h3100-specific values here */
	GPCR = 0x0fffffff;	 /* All outputs are set low by default */
	GPDR = GPIO_H3600_COM_RTS  | GPIO_H3600_L3_CLOCK |
	       GPIO_H3600_L3_MODE  | GPIO_H3600_L3_DATA  |
	       GPIO_H3600_CLK_SET1 | GPIO_H3600_CLK_SET0 |
	       H3100_DIRECT_EGPIO;

	/* Older bootldrs put GPIO2-9 in alternate mode on the
	   assumption that they are used for video */
	GAFR &= ~H3100_DIRECT_EGPIO;

	H3100_EGPIO = h3100_egpio;
	ipaq_model_ops = h3100_model_ops;
}

MACHINE_START(H3100, "Compaq iPAQ H3100")
	BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
	BOOT_PARAMS(0xc0000100)
	MAPIO(h3100_map_io)
	INITIRQ(sa1100_init_irq)
	INITTIME(sa1100_init_time)
MACHINE_END

#endif /* CONFIG_SA1100_H3100 */

/************************* H3600 *************************/

#ifdef CONFIG_SA1100_H3600

#define H3600_EGPIO	(*(volatile unsigned int *)H3600_EGPIO_VIRT)
static unsigned int h3600_egpio = EGPIO_H3600_RS232_ON;

static void h3600_control_egpio(enum ipaq_egpio_type x, int setp)
{
	unsigned int egpio = 0;
	unsigned long flags;

	switch (x) {
	case IPAQ_EGPIO_LCD_POWER:
		egpio |= EGPIO_H3600_LCD_ON |
			 EGPIO_H3600_LCD_PCI |
			 EGPIO_H3600_LCD_5V_ON |
			 EGPIO_H3600_LVDD_ON;
		do_blank(setp);
		break;
	case IPAQ_EGPIO_LCD_ENABLE:
		break;
	case IPAQ_EGPIO_CODEC_NRESET:
		egpio |= EGPIO_H3600_CODEC_NRESET;
		break;
	case IPAQ_EGPIO_AUDIO_ON:
		egpio |= EGPIO_H3600_AUD_AMP_ON |
			 EGPIO_H3600_AUD_PWR_ON;
		break;
	case IPAQ_EGPIO_QMUTE:
		egpio |= EGPIO_H3600_QMUTE;
		break;
	case IPAQ_EGPIO_OPT_NVRAM_ON:
		egpio |= EGPIO_H3600_OPT_NVRAM_ON;
		break;
	case IPAQ_EGPIO_OPT_ON:
		egpio |= EGPIO_H3600_OPT_ON;
		break;
	case IPAQ_EGPIO_CARD_RESET:
		egpio |= EGPIO_H3600_CARD_RESET;
		break;
	case IPAQ_EGPIO_OPT_RESET:
		egpio |= EGPIO_H3600_OPT_RESET;
		break;
	case IPAQ_EGPIO_IR_ON:
		egpio |= EGPIO_H3600_IR_ON;
		break;
	case IPAQ_EGPIO_IR_FSEL:
		egpio |= EGPIO_H3600_IR_FSEL;
		break;
	case IPAQ_EGPIO_RS232_ON:
		egpio |= EGPIO_H3600_RS232_ON;
		break;
	case IPAQ_EGPIO_VPP_ON:
		egpio |= EGPIO_H3600_VPP_ON;
		break;
	}

	if (egpio) {
		local_irq_save(flags);
		if (setp)
			h3600_egpio |= egpio;
		else
			h3600_egpio &= ~egpio;
		H3600_EGPIO = h3600_egpio;
		local_irq_restore(flags);
	}
}

static unsigned long h3600_read_egpio(void)
{
	return h3600_egpio;
}

static int h3600_pm_callback(int req)
{
	if (ipaq_model_ops.pm_callback_aux)
		return ipaq_model_ops.pm_callback_aux(req);
	return 0;
}

static struct ipaq_model_ops h3600_model_ops __initdata = {
	.generic_name	= "3600",
	.control	= h3600_control_egpio,
	.read		= h3600_read_egpio,
	.pm_callback	= h3600_pm_callback
};

static void __init h3600_map_io(void)
{
	h3xxx_map_io();

	/* Initialize h3600-specific values here */

	GPCR = 0x0fffffff;	 /* All outputs are set low by default */
	GPDR = GPIO_H3600_COM_RTS  | GPIO_H3600_L3_CLOCK |
	       GPIO_H3600_L3_MODE  | GPIO_H3600_L3_DATA  |
	       GPIO_H3600_CLK_SET1 | GPIO_H3600_CLK_SET0 |
	       GPIO_LDD15 | GPIO_LDD14 | GPIO_LDD13 | GPIO_LDD12 |
	       GPIO_LDD11 | GPIO_LDD10 | GPIO_LDD9  | GPIO_LDD8;

	H3600_EGPIO = h3600_egpio;	   /* Maintains across sleep? */
	ipaq_model_ops = h3600_model_ops;