tqm5200.c

linux下的BOOT程序原码,有需要的可以来下,保证好用

#if defined (CONFIG_MINIFAP)
	if (idereset) {
		*(vu_long *) (SM501_MMIO_BASE+SM501_GPIO_DATA_HIGH) &=
			~SM501_GPIO_51;
	} else {
		*(vu_long *) (SM501_MMIO_BASE+SM501_GPIO_DATA_HIGH) |=
			SM501_GPIO_51;
	}
#else
	if (idereset) {
		*(vu_long *) MPC5XXX_WU_GPIO_DATA &= ~GPIO_PSC1_4;
	} else {
		*(vu_long *) MPC5XXX_WU_GPIO_DATA |=  GPIO_PSC1_4;
	}
#endif
}
#endif /* defined (CFG_CMD_IDE) && defined (CONFIG_IDE_RESET) */

#ifdef CONFIG_POST
/*
 * Reads GPIO pin PSC6_3. A keypress is reported, if PSC6_3 is low. If PSC6_3
 * is left open, no keypress is detected.
 */
int post_hotkeys_pressed(void)
{
	struct mpc5xxx_gpio *gpio;

	gpio = (struct mpc5xxx_gpio*) MPC5XXX_GPIO;

	/*
	 * Configure PSC6_1 and PSC6_3 as GPIO. PSC6 then couldn't be used in
	 * CODEC or UART mode. Consumer IrDA should still be possible.
	 */
	gpio->port_config &= ~(0x07000000);
	gpio->port_config |=   0x03000000;

	/* Enable GPIO for GPIO_IRDA_1 (IR_USB_CLK pin) = PSC6_3 */
	gpio->simple_gpioe |= 0x20000000;

	/* Configure GPIO_IRDA_1 as input */
	gpio->simple_ddr &= ~(0x20000000);

	return ((gpio->simple_ival & 0x20000000) ? 0 : 1);
}
#endif

#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)

void post_word_store (ulong a)
{
	volatile ulong *save_addr =
		(volatile ulong *)(MPC5XXX_SRAM + MPC5XXX_SRAM_POST_SIZE);

	*save_addr = a;
}

ulong post_word_load (void)
{
	volatile ulong *save_addr =
		(volatile ulong *)(MPC5XXX_SRAM + MPC5XXX_SRAM_POST_SIZE);

	return *save_addr;
}
#endif	/* CONFIG_POST || CONFIG_LOGBUFFER*/

#ifdef CONFIG_PS2MULT
#ifdef CONFIG_BOARD_EARLY_INIT_R
int board_early_init_r (void)
{
	ps2mult_early_init();
	return (0);
}
#endif
#endif /* CONFIG_PS2MULT */

#if defined(CONFIG_CS_AUTOCONF)
int last_stage_init (void)
{
	/*
	 * auto scan for really existing devices and re-set chip select
	 * configuration.
	 */
	u16 save, tmp;
	int restore;

	/*
	 * Check for SRAM and SRAM size
	 */

	/* save original SRAM content  */
	save = *(volatile u16 *)CFG_CS2_START;
	restore = 1;

	/* write test pattern to SRAM */
	*(volatile u16 *)CFG_CS2_START = 0xA5A5;
	__asm__ volatile ("sync");
	/*
	 * Put a different pattern on the data lines: otherwise they may float
	 * long enough to read back what we wrote.
	 */
	tmp = *(volatile u16 *)CFG_FLASH_BASE;
	if (tmp == 0xA5A5)
		puts ("!! possible error in SRAM detection\n");

	if (*(volatile u16 *)CFG_CS2_START != 0xA5A5) {
		/* no SRAM at all, disable cs */
		*(vu_long *)MPC5XXX_ADDECR &= ~(1 << 18);
		*(vu_long *)MPC5XXX_CS2_START = 0x0000FFFF;
		*(vu_long *)MPC5XXX_CS2_STOP = 0x0000FFFF;
		restore = 0;
		__asm__ volatile ("sync");
	} else if (*(volatile u16 *)(CFG_CS2_START + (1<<19)) == 0xA5A5) {
		/* make sure that we access a mirrored address */
		*(volatile u16 *)CFG_CS2_START = 0x1111;
		__asm__ volatile ("sync");
		if (*(volatile u16 *)(CFG_CS2_START + (1<<19)) == 0x1111) {
			/* SRAM size = 512 kByte */
			*(vu_long *)MPC5XXX_CS2_STOP = STOP_REG(CFG_CS2_START,
								0x80000);
			__asm__ volatile ("sync");
			puts ("SRAM:  512 kB\n");
		}
		else
			puts ("!! possible error in SRAM detection\n");
	} else {
		puts ("SRAM:  1 MB\n");
	}
	/* restore origianl SRAM content  */
	if (restore) {
		*(volatile u16 *)CFG_CS2_START = save;
		__asm__ volatile ("sync");
	}

	/*
	 * Check for Grafic Controller
	 */

	/* save origianl FB content  */
	save = *(volatile u16 *)CFG_CS1_START;
	restore = 1;

	/* write test pattern to FB memory */
	*(volatile u16 *)CFG_CS1_START = 0xA5A5;
	__asm__ volatile ("sync");
	/*
	 * Put a different pattern on the data lines: otherwise they may float
	 * long enough to read back what we wrote.
	 */
	tmp = *(volatile u16 *)CFG_FLASH_BASE;
	if (tmp == 0xA5A5)
		puts ("!! possible error in grafic controller detection\n");

	if (*(volatile u16 *)CFG_CS1_START != 0xA5A5) {
		/* no grafic controller at all, disable cs */
		*(vu_long *)MPC5XXX_ADDECR &= ~(1 << 17);
		*(vu_long *)MPC5XXX_CS1_START = 0x0000FFFF;
		*(vu_long *)MPC5XXX_CS1_STOP = 0x0000FFFF;
		restore = 0;
		__asm__ volatile ("sync");
	} else {
		puts ("VGA:   SMI501 (Voyager) with 8 MB\n");
	}
	/* restore origianl FB content  */
	if (restore) {
		*(volatile u16 *)CFG_CS1_START = save;
		__asm__ volatile ("sync");
	}

	return 0;
}
#endif /* CONFIG_CS_AUTOCONF */

#ifdef CONFIG_VIDEO_SM501

#define DISPLAY_WIDTH   640
#define DISPLAY_HEIGHT  480

#ifdef CONFIG_VIDEO_SM501_8BPP
#error CONFIG_VIDEO_SM501_8BPP not supported.
#endif /* CONFIG_VIDEO_SM501_8BPP */

#ifdef CONFIG_VIDEO_SM501_16BPP
#error CONFIG_VIDEO_SM501_16BPP not supported.
#endif /* CONFIG_VIDEO_SM501_16BPP */
#ifdef CONFIG_VIDEO_SM501_32BPP
static const SMI_REGS init_regs [] =
{
#if 0 /* CRT only */
	{0x00004, 0x0},
	{0x00048, 0x00021807},
	{0x0004C, 0x10090a01},
	{0x00054, 0x1},
	{0x00040, 0x00021807},
	{0x00044, 0x10090a01},
	{0x00054, 0x0},
	{0x80200, 0x00010000},
	{0x80204, 0x0},
	{0x80208, 0x0A000A00},
	{0x8020C, 0x02fa027f},
	{0x80210, 0x004a028b},
	{0x80214, 0x020c01df},
	{0x80218, 0x000201e9},
	{0x80200, 0x00013306},
#else  /* panel + CRT */
	{0x00004, 0x0},
	{0x00048, 0x00021807},
	{0x0004C, 0x091a0a01},
	{0x00054, 0x1},
	{0x00040, 0x00021807},
	{0x00044, 0x091a0a01},
	{0x00054, 0x0},
	{0x80000, 0x0f013106},
	{0x80004, 0xc428bb17},
	{0x8000C, 0x00000000},
	{0x80010, 0x0a000a00},
	{0x80014, 0x02800000},
	{0x80018, 0x01e00000},
	{0x8001C, 0x00000000},
	{0x80020, 0x01e00280},
	{0x80024, 0x02fa027f},
	{0x80028, 0x004a028b},
	{0x8002C, 0x020c01df},
	{0x80030, 0x000201e9},
	{0x80200, 0x00010000},
#endif
	{0, 0}
};
#endif /* CONFIG_VIDEO_SM501_32BPP */

#ifdef CONFIG_CONSOLE_EXTRA_INFO
/*
 * Return text to be printed besides the logo.
 */
void video_get_info_str (int line_number, char *info)
{
	if (line_number == 1) {
#if defined (CONFIG_TQM5200_AA)
		strcpy (info, " Board: TQM5200-AA (TQ-Components GmbH)");
#elif defined (CONFIG_TQM5200_AB)
		strcpy (info, " Board: TQM5200-AB (TQ-Components GmbH)");
#elif defined (CONFIG_TQM5200_AC)
		strcpy (info, " Board: TQM5200-AC (TQ-Components GmbH)");
#elif defined (CONFIG_TQM5200)
		strcpy (info, " Board: TQM5200 (TQ-Components GmbH)");
#else
#error No supported board selected
#endif
#if defined (CONFIG_STK52XX)
	} else if (line_number == 2) {
		strcpy (info, "        on a STK52XX baseboard");
#endif
	}
	else {
		info [0] = '\0';
	}
}
#endif

/*
 * Returns SM501 register base address. First thing called in the
 * driver. Checks if SM501 is physically present.
 */
unsigned int board_video_init (void)
{
	u16 save, tmp;
	int restore, ret;

	/*
	 * Check for Grafic Controller
	 */

	/* save origianl FB content  */
	save = *(volatile u16 *)CFG_CS1_START;
	restore = 1;

	/* write test pattern to FB memory */
	*(volatile u16 *)CFG_CS1_START = 0xA5A5;
	__asm__ volatile ("sync");
	/*
	 * Put a different pattern on the data lines: otherwise they may float
	 * long enough to read back what we wrote.
	 */
	tmp = *(volatile u16 *)CFG_FLASH_BASE;
	if (tmp == 0xA5A5)
		puts ("!! possible error in grafic controller detection\n");

	if (*(volatile u16 *)CFG_CS1_START != 0xA5A5) {
		/* no grafic controller found */
		restore = 0;
		ret = 0;
	} else {
		ret = SM501_MMIO_BASE;
	}

	if (restore) {
		*(volatile u16 *)CFG_CS1_START = save;
		__asm__ volatile ("sync");
	}
	return ret;
}

/*
 * Returns SM501 framebuffer address
 */
unsigned int board_video_get_fb (void)
{
	return SM501_FB_BASE;
}

/*
 * Called after initializing the SM501 and before clearing the screen.
 */
void board_validate_screen (unsigned int base)
{
}

/*
 * Return a pointer to the initialization sequence.
 */
const SMI_REGS *board_get_regs (void)
{
	return init_regs;
}

int board_get_width (void)
{
	return DISPLAY_WIDTH;
}

int board_get_height (void)
{
	return DISPLAY_HEIGHT;
}

#endif /* CONFIG_VIDEO_SM501 */