sa1100fb.c

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};
#endif

#ifdef CONFIG_SA1100_STORK
#if STORK_TFT			/* ie the NEC TFT */
/*
 * pixclock is ps per clock. say 72Hz, 800x600 clocks => (1/72)/(800*600)
 * = 28935 and a bit
 * NB likely to be increased to ease bus timings wrt pcmcia interface
 */
static struct sa1100fb_mach_info stork_tft_info __initdata = {
	pixclock:	28935,		bpp:		16,
	xres:		640,		yres:		480,

	hsync_len:	64,		vsync_len:	2,
	left_margin:	48,		upper_margin:	12,
	right_margin:	48,		lower_margin:	31,

	sync:		0,

	lccr0:		LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
	lccr3:		LCCR3_OutEnH | LCCR3_PixRsEdg,
};

static struct sa1100fb_rgb stork_tft_rgb_16 = {
	red:	{ offset: 11, length: 5, },
	green:	{ offset: 5,  length: 6, },
	blue:	{ offset: 0,  length: 5, },
	transp:	{ offset: 0,  length: 0, },
};

#else	/* Kyocera DSTN */

static struct sa1100fb_mach_info stork_dstn_info __initdata = {
	pixclock:	0,		bpp:		16,
	xres:		640,		yres:		480,

	hsync_len:	2,		vsync_len:	2,
	left_margin:	2,		upper_margin:	0,
	right_margin:	2,		lower_margin:	0,

	sync:		FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT ,

	lccr0:		LCCR0_Color | LCCR0_Dual | LCCR0_Pas,
#error Fixme
	lccr3:		0xff00 |
			0x18		/* ought to be 0x14 but DMA isn't up to that as yet */
};

static struct sa1100fb_rgb stork_dstn_rgb_16 = {
	red:	{ offset: 8,  length: 4, },
	green:	{ offset: 4,  length: 4, },
	blue:	{ offset: 0,  length: 4, },
	transp:	{ offset: 0,  length: 0, },
};
#endif
#endif

#ifdef CONFIG_SA1100_XP860
static struct sa1100fb_mach_info xp860_info __initdata = {
	pixclock:	0,		bpp:		8,
	xres:		1024,		yres:		768,

	hsync_len:	3,		vsync_len:	3,
	left_margin:	3,		upper_margin:	2,
	right_margin:	2,		lower_margin:	1,

	sync:		0,

	lccr0:		LCCR0_Color | LCCR0_Sngl | LCCR0_Act,
	lccr3:		LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_PixClkDiv(6),
};
#endif



static struct sa1100fb_mach_info * __init
sa1100fb_get_machine_info(struct sa1100fb_info *fbi)
{
	struct sa1100fb_mach_info *inf = NULL;

	/*
	 *            R        G       B       T
	 * default  {11,5}, { 5,6}, { 0,5}, { 0,0}
	 * h3600    {12,4}, { 7,4}, { 1,4}, { 0,0}
	 * freebird { 8,4}, { 4,4}, { 0,4}, {12,4}
	 */
#ifdef CONFIG_SA1100_ASSABET
	if (machine_is_assabet()) {
#ifndef ASSABET_PAL_VIDEO
		inf = &lq039q2ds54_info;
#else
		inf = &pal_info;
#endif
	}
#endif
#ifdef CONFIG_SA1100_H3XXX
	if (machine_is_h3600()) {
		inf = &h3600_info;
		fbi->rgb[RGB_16] = &h3600_rgb_16;
	}
	if (machine_is_h3100()) {
		inf = &h3100_info;
	}
	if (machine_is_h3800()) {
		inf = &h3800_info;
	}
#endif
#ifdef CONFIG_SA1100_BRUTUS
	if (machine_is_brutus()) {
		inf = &brutus_info;
	}
#endif
#ifdef CONFIG_SA1100_CERF
	if (machine_is_cerf()) {
		inf = &cerf_info;
	}
#endif
#ifdef CONFIG_SA1100_FREEBIRD
	if (machine_is_freebird()) {
		inf = &freebird_info;
		fbi->rgb[RGB_16] = &freebird_rgb16;
	}
#endif
#ifdef CONFIG_SA1100_GRAPHICSCLIENT
	if (machine_is_graphicsclient()) {
		inf = &graphicsclient_info;
	}
#endif
#ifdef CONFIG_SA1100_HUW_WEBPANEL
	if (machine_is_huw_webpanel()) {
		inf = &huw_webpanel_info;
	}
#endif
#ifdef CONFIG_SA1100_LART
	if (machine_is_lart()) {
#ifdef LART_GREY_LCD
		inf = &lart_grey_info;
#endif
#ifdef LART_COLOR_LCD
		inf = &lart_color_info;
#endif
#ifdef LART_VIDEO_OUT
		inf = &lart_video_info;
#endif
#ifdef KIT01_LCD
		inf = &kit01_info;
#endif
	}
#endif
#ifdef CONFIG_SA1100_FRODO
	if (machine_is_frodo()) {
#ifdef KIT01_LCD
		inf = &kit01_info;
#endif
	}
#endif
#ifdef CONFIG_SA1100_SHANNON
	if (machine_is_shannon()) {
		inf = &shannon_info;
	}
#endif
#ifdef CONFIG_SA1100_OMNIMETER
	if (machine_is_omnimeter()) {
		inf = &omnimeter_info;
	}
#endif
#ifdef CONFIG_SA1100_PANGOLIN
	if (machine_is_pangolin()) {
		inf = &pangolin_info;
	}
#endif
#ifdef CONFIG_SA1100_XP860
	if (machine_is_xp860()) {
		inf = &xp860_info;
	}
#endif
#ifdef CONFIG_SA1100_STORK
	if (machine_is_stork()) {
#if STORK_TFT
		inf = &stork_tft_info;
		fbi->rgb[RGB_16] = &stork_tft_rgb_16;
#else
		inf = &stork_dstn_info;
		fbi->rgb[RGB_16] = &stork_dstn_rgb_16;
#endif
	}
#endif
	return inf;
}

static int sa1100fb_activate_var(struct fb_var_screeninfo *var, struct sa1100fb_info *);
static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state);

static inline void sa1100fb_schedule_task(struct sa1100fb_info *fbi, u_int state)
{
	unsigned long flags;

	local_irq_save(flags);
	/*
	 * We need to handle two requests being made at the same time.
	 * There are two important cases:
	 *  1. When we are changing VT (C_REENABLE) while unblanking (C_ENABLE)
	 *     We must perform the unblanking, which will do our REENABLE for us.
	 *  2. When we are blanking, but immediately unblank before we have
	 *     blanked.  We do the "REENABLE" thing here as well, just to be sure.
	 */
	if (fbi->task_state == C_ENABLE && state == C_REENABLE)
		state = (u_int) -1;
	if (fbi->task_state == C_DISABLE && state == C_ENABLE)
		state = C_REENABLE;

	if (state != (u_int)-1) {
		fbi->task_state = state;
		schedule_task(&fbi->task);
	}
	local_irq_restore(flags);
}

/*
 * Get the VAR structure pointer for the specified console
 */
static inline struct fb_var_screeninfo *get_con_var(struct fb_info *info, int con)
{
	struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
	return (con == fbi->currcon || con == -1) ? &fbi->fb.var : &fb_display[con].var;
}

/*
 * Get the DISPLAY structure pointer for the specified console
 */
static inline struct display *get_con_display(struct fb_info *info, int con)
{
	struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
	return (con < 0) ? fbi->fb.disp : &fb_display[con];
}

/*
 * Get the CMAP pointer for the specified console
 */
static inline struct fb_cmap *get_con_cmap(struct fb_info *info, int con)
{
	struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
	return (con == fbi->currcon || con == -1) ? &fbi->fb.cmap : &fb_display[con].cmap;
}

static inline u_int
chan_to_field(u_int chan, struct fb_bitfield *bf)
{
	chan &= 0xffff;
	chan >>= 16 - bf->length;
	return chan << bf->offset;
}

/*
 * Convert bits-per-pixel to a hardware palette PBS value.
 */
static inline u_int
palette_pbs(struct fb_var_screeninfo *var)
{
	int ret = 0;
	switch (var->bits_per_pixel) {
#ifdef FBCON_HAS_CFB4
	case 4:  ret = 0 << 12;	break;
#endif
#ifdef FBCON_HAS_CFB8
	case 8:  ret = 1 << 12; break;
#endif
#ifdef FBCON_HAS_CFB16
	case 16: ret = 2 << 12; break;
#endif
	}
	return ret;
}

static int
sa1100fb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
		       u_int trans, struct fb_info *info)
{
	struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
	u_int val, ret = 1;

	if (regno < fbi->palette_size) {
		val = ((red >> 4) & 0xf00);
		val |= ((green >> 8) & 0x0f0);
		val |= ((blue >> 12) & 0x00f);

		if (regno == 0)
			val |= palette_pbs(&fbi->fb.var);

		fbi->palette_cpu[regno] = val;
		ret = 0;
	}
	return ret;
}

static int
sa1100fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
		   u_int trans, struct fb_info *info)
{
	struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
	struct display *disp = get_con_display(info, fbi->currcon);
	u_int val;
	int ret = 1;

	/*
	 * If inverse mode was selected, invert all the colours
	 * rather than the register number.  The register number
	 * is what you poke into the framebuffer to produce the
	 * colour you requested.
	 */
	if (disp->inverse) {
		red   = 0xffff - red;
		green = 0xffff - green;
		blue  = 0xffff - blue;
	}

	/*
	 * If greyscale is true, then we convert the RGB value
	 * to greyscale no mater what visual we are using.
	 */
	if (fbi->fb.var.grayscale)
		red = green = blue = (19595 * red + 38470 * green +
					7471 * blue) >> 16;

	switch (fbi->fb.disp->visual) {
	case FB_VISUAL_TRUECOLOR:
		/*
		 * 12 or 16-bit True Colour.  We encode the RGB value
		 * according to the RGB bitfield information.
		 */
		if (regno < 16) {
			u16 *pal = fbi->fb.pseudo_palette;

			val  = chan_to_field(red, &fbi->fb.var.red);
			val |= chan_to_field(green, &fbi->fb.var.green);
			val |= chan_to_field(blue, &fbi->fb.var.blue);

			pal[regno] = val;
			ret = 0;
		}
		break;

	case FB_VISUAL_STATIC_PSEUDOCOLOR:
	case FB_VISUAL_PSEUDOCOLOR:
		ret = sa1100fb_setpalettereg(regno, red, green, blue, trans, info);
		break;
	}

	return ret;
}

/*
 *  sa1100fb_display_dma_period()
 *    Calculate the minimum period (in picoseconds) between two DMA
 *    requests for the LCD controller.
 */
static unsigned int
sa1100fb_display_dma_period(struct fb_var_screeninfo *var)
{
	unsigned int mem_bits_per_pixel;

	mem_bits_per_pixel = var->bits_per_pixel;
	if (mem_bits_per_pixel == 12)
		mem_bits_per_pixel = 16;

	/*
	 * Period = pixclock * bits_per_byte * bytes_per_transfer
	 *		/ memory_bits_per_pixel;
	 */
	return var->pixclock * 8 * 16 / mem_bits_per_pixel;
}

/*
 *  sa1100fb_decode_var():
 *    Get the video params out of 'var'. If a value doesn't fit, round it up,
 *    if it's too big, return -EINVAL.
 *
 *    Suggestion: Round up in the following order: bits_per_pixel, xres,
 *    yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
 *    bitfields, horizontal timing, vertical timing.
 */
static int
sa1100fb_validate_var(struct fb_var_screeninfo *var,
		      struct sa1100fb_info *fbi)
{
	int ret = -EINVAL;

	if (var->xres < MIN_XRES)
		var->xres = MIN_XRES;
	if (var->yres < MIN_YRES)
		var->yres = MIN_YRES;
	if (var->xres > fbi->max_xres)
		var->xres = fbi->max_xres;
	if (var->yres > fbi->max_yres)
		var->yres = fbi->max_yres;
	var->xres_virtual =
	    var->xres_virtual < var->xres ? var->xres : var->xres_virtual;
	var->yres_virtual =
	    var->yres_virtual < var->yres ? var->yres : var->yres_virtual;

	DPRINTK("var->bits_per_pixel=%d\n", var->bits_per_pixel);
	switch (var->bits_per_pixel) {
#ifdef FBCON_HAS_CFB4
	case 4:		ret = 0; break;
#endif
#ifdef FBCON_HAS_CFB8
	case 8:		ret = 0; break;
#endif
#ifdef FBCON_HAS_CFB16
	case 16:	ret = 0; break;
#endif
	default:
		break;
	}

#ifdef CONFIG_CPU_FREQ
	printk(KERN_DEBUG "dma period = %d ps, clock = %d kHz\n",
		sa1100fb_display_dma_period(var),
		cpufreq_get(smp_processor_id()));
#endif

	return ret;
}

static inline void sa1100fb_set_truecolor(u_int is_true_color)
{
	DPRINTK("true_color = %d\n", is_true_color);

	if (machine_is_assabet()) {
#if 1
		// phase 4 or newer Assabet's
		if (is_true_color)
			ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
		else
			ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
#else
		// older Assabet's
		if (is_true_color)
			ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB);
		else
			ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB);
#endif
	}
}

static void
sa1100fb_hw_set_var(struct fb_var_screeninfo *var, struct sa1100fb_info *fbi)
{
	u_long palette_mem_size;

	fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;

	palette_mem_size = fbi->palette_size * sizeof(u16);

	DPRINTK("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);

	fbi->palette_cpu = (u16 *)(fbi->map_cpu + PAGE_SIZE - palette_mem_size);
	fbi->palette_dma = fbi->map_dma + PAGE_SIZE - palette_mem_size;

	fb_set_cmap(&fbi->fb.cmap, 1, sa1100fb_setcolreg, &fbi->fb);

	/* Set board control register to handle new color depth */
	sa1100fb_set_truecolor(var->bits_per_pixel >= 16);

#ifdef CONFIG_SA1100_OMNIMETER
#error Do we have to do this here?   We already do it at init time.
	if (machine_is_omnimeter())
		SetLCDContrast(DefaultLCDContrast);
#endif

	sa1100fb_activate_var(var, fbi);

	fbi->palette_cpu[0] = (fbi->palette_cpu[0] &
					 0xcfff) | palette_pbs(var);

}

/*
 * sa1100fb_set_var():
 *	Set the user defined part of the display for the specified console
 */
static int
sa1100fb_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
{
	struct sa1100fb_info *fbi = (struct sa1100fb_info *)info;
	struct fb_var_screeninfo *dvar = get_con_var(&fbi->fb, con);
	struct display *display = get_con_display(&fbi->fb, con);
	int err, chgvar = 0, rgbidx;

	DPRINTK("set_var\n");

	/*
	 * Decode var contents into a par structure, adjusting any
	 * out of range values.
	 */
	err = sa1100fb_validate_var(var, fbi);
	if (err)
		return err;

	if (var->activate & FB_ACTIVATE_TEST)
		return 0;

	if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW)
		return -EINVAL;

	if (dvar->xres != var->xres)
		chgvar = 1;
	if (dvar->yres != var->yres)
		chgvar = 1;
	if (dvar->xres_virtual != var->xres_virtual)
		chgvar = 1;
	if (dvar->yres_virtual != var->yres_virtual)
		chgvar = 1;
	if (dvar->bits_per_pixel != var->bits_per_pixel)
		chgvar = 1;
	if (con < 0)
		chgvar = 0;

	switch (var->bits_per_pixel) {
#ifdef FBCON_HAS_CFB4
	case 4:
		if (fbi->cmap_static)
			display->visual	= FB_VISUAL_STATIC_PSEUDOCOLOR;
		else
			display->visual	= FB_VISUAL_PSEUDOCOLOR;
		display->line_length	= var->xres / 2;
		display->dispsw		= &fbcon_cfb4;
		rgbidx			= RGB_8;
		break;
#endif
#ifdef FBCON_HAS_CFB8
	case 8:
		if (fbi->cmap_static)
			display->visual	= FB_VISUAL_STATIC_PSEUDOCOLOR;
		else
			display->visual	= FB_VISUAL_PSEUDOCOLOR;
		display->line_length	= var->xres;
		display->dispsw		= &fbcon_cfb8;
		rgbidx			= RGB_8;
		break;
#endif
#ifdef FBCON_HAS_CFB16
	case 16:
		display->visual		= FB_VISUAL_TRUECOLOR;
		display->line_length	= var->xres * 2;
		display->dispsw		= &fbcon_cfb16;
		display->dispsw_data	= fbi->fb.pseudo_palette;
		rgbidx			= RGB_16;
		break;
#endif
	default:
		rgbidx = 0;
		display->dispsw = &fbcon_dummy;
		break;
	}

	display->screen_base	= fbi->screen_cpu;
	display->next_line	= display->line_length;
	display->type		= fbi->fb.fix.type;
	display->type_aux	= fbi->fb.fix.type_aux;
	display->ypanstep	= fbi->fb.fix.ypanstep;
	display->ywrapstep	= fbi->fb.fix.ywrapstep;
	display->can_soft_blank	= 1;
	display->inverse	= fbi->cmap_inverse;