tqm5200.c

U-BOOT,著名的Bootloader程序

#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_BOARD_EARLY_INIT_R
int board_early_init_r (void)
{

	extern int usb_cpu_init(void);

#ifdef CONFIG_PS2MULT
	ps2mult_early_init();
#endif /* CONFIG_PS2MULT */

#if defined(CONFIG_USB_OHCI_NEW) && defined(CFG_USB_OHCI_CPU_INIT)
	/* Low level USB init, required for proper kernel operation */
	usb_cpu_init();
#endif

	return (0);
}
#endif

#ifdef CONFIG_FO300
int silent_boot (void)
{
	vu_long timer3_status;

	/* Configure GPT3 as GPIO input */
	*(vu_long *)MPC5XXX_GPT3_ENABLE = 0x00000004;

	/* Read in TIMER_3 pin status */
	timer3_status = *(vu_long *)MPC5XXX_GPT3_STATUS;

#ifdef FO300_SILENT_CONSOLE_WHEN_S1_CLOSED
	/* Force silent console mode if S1 switch
	 * is in closed position (TIMER_3 pin status is LOW). */
	if (MPC5XXX_GPT_GPIO_PIN(timer3_status) == 0)
		return 1;
#else
	/* Force silent console mode if S1 switch
	 * is in open position (TIMER_3 pin status is HIGH). */
	if (MPC5XXX_GPT_GPIO_PIN(timer3_status) == 1)
		return 1;
#endif

	return 0;
}

int board_early_init_f (void)
{
	if (silent_boot())
		gd->flags |= GD_FLG_SILENT;

	return 0;
}
#endif	/* CONFIG_FO300 */

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");
	}

#ifndef CONFIG_TQM5200S	/* The TQM5200S has no SM501 grafic controller */
	/*
	 * 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");
	}

#ifdef CONFIG_FO300
	if (silent_boot()) {
		setenv("bootdelay", "0");
		disable_ctrlc(1);
	}
#endif
#endif /* !CONFIG_TQM5200S */

	return 0;
}

#ifdef CONFIG_VIDEO_SM501

#ifdef CONFIG_FO300
#define DISPLAY_WIDTH   800
#else
#define DISPLAY_WIDTH   640
#endif
#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 */
#ifdef CONFIG_FO300
	{0x00004, 0x0},
	{0x00048, 0x00021807},
	{0x0004C, 0x301a0a01},
	{0x00054, 0x1},
	{0x00040, 0x00021807},
	{0x00044, 0x091a0a01},
	{0x00054, 0x0},
	{0x80000, 0x0f013106},
	{0x80004, 0xc428bb17},
	{0x8000C, 0x00000000},
	{0x80010, 0x0C800C80},
	{0x80014, 0x03200000},
	{0x80018, 0x01e00000},
	{0x8001C, 0x00000000},
	{0x80020, 0x01e00320},
	{0x80024, 0x042a031f},
	{0x80028, 0x0086034a},
	{0x8002C, 0x020c01df},
	{0x80030, 0x000201ea},
	{0x80200, 0x00010000},
#else
	{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 /* #ifdef CONFIG_FO300 */
#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) {
	strcpy (info, " Board: TQM5200 (TQ-Components GmbH)");
#if defined (CONFIG_STK52XX) || defined (CONFIG_TB5200) || defined(CONFIG_FO300)
	} else if (line_number == 2) {
#if defined (CONFIG_STK52XX)
		strcpy (info, "        on a STK52xx carrier board");
#endif
#if defined (CONFIG_TB5200)
		strcpy (info, "        on a TB5200 carrier board");
#endif
#if defined (CONFIG_FO300)
		strcpy (info, "        on a FO300 carrier board");
#endif
#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 */

#if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
void ft_board_setup(void *blob, bd_t *bd)
{
	ft_cpu_setup(blob, bd);
	fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
}
#endif /* defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP) */