1 files changed, 642 insertions, 0 deletions

diff --git a/drivers/video/mxc_ipuv3_fb.c b/drivers/video/mxc_ipuv3_fb.c
new file mode 100644
index 0000000..a66981c
--- /dev/null
+++ b/drivers/video/mxc_ipuv3_fb.c
@@ -0,0 +1,642 @@
+/*
+ * Porting to u-boot:
+ *
+ * (C) Copyright 2010
+ * Stefano Babic, DENX Software Engineering, sbabic@denx.de
+ *
+ * MX51 Linux framebuffer:
+ *
+ * (C) Copyright 2004-2010 Freescale Semiconductor, Inc.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* #define DEBUG */
+#include <common.h>
+#include <asm/errno.h>
+#include <linux/string.h>
+#include <linux/list.h>
+#include <linux/fb.h>
+#include <asm/io.h>
+#include <malloc.h>
+#include <lcd.h>
+#include "videomodes.h"
+#include "ipu.h"
+#include "mxcfb.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void *lcd_base;			/* Start of framebuffer memory	*/
+void *lcd_console_address;	/* Start of console buffer	*/
+
+int lcd_line_length;
+int lcd_color_fg;
+int lcd_color_bg;
+
+short console_col;
+short console_row;
+
+vidinfo_t panel_info;
+
+static int mxcfb_map_video_memory(struct fb_info *fbi);
+static int mxcfb_unmap_video_memory(struct fb_info *fbi);
+
+void lcd_initcolregs(void)
+{
+}
+
+void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
+{
+}
+
+void lcd_disable(void)
+{
+}
+
+void lcd_panel_disable(void)
+{
+}
+
+void fb_videomode_to_var(struct fb_var_screeninfo *var,
+			 const struct fb_videomode *mode)
+{
+	var->xres = mode->xres;
+	var->yres = mode->yres;
+	var->xres_virtual = mode->xres;
+	var->yres_virtual = mode->yres;
+	var->xoffset = 0;
+	var->yoffset = 0;
+	var->pixclock = mode->pixclock;
+	var->left_margin = mode->left_margin;
+	var->right_margin = mode->right_margin;
+	var->upper_margin = mode->upper_margin;
+	var->lower_margin = mode->lower_margin;
+	var->hsync_len = mode->hsync_len;
+	var->vsync_len = mode->vsync_len;
+	var->sync = mode->sync;
+	var->vmode = mode->vmode & FB_VMODE_MASK;
+}
+
+/*
+ * Structure containing the MXC specific framebuffer information.
+ */
+struct mxcfb_info {
+	int blank;
+	ipu_channel_t ipu_ch;
+	int ipu_di;
+	u32 ipu_di_pix_fmt;
+	unsigned char overlay;
+	unsigned char alpha_chan_en;
+	dma_addr_t alpha_phy_addr0;
+	dma_addr_t alpha_phy_addr1;
+	void *alpha_virt_addr0;
+	void *alpha_virt_addr1;
+	uint32_t alpha_mem_len;
+	uint32_t cur_ipu_buf;
+	uint32_t cur_ipu_alpha_buf;
+
+	u32 pseudo_palette[16];
+};
+
+enum {
+	BOTH_ON,
+	SRC_ON,
+	TGT_ON,
+	BOTH_OFF
+};
+
+static unsigned long default_bpp = 16;
+static unsigned char g_dp_in_use;
+static struct fb_info *mxcfb_info[3];
+static int ext_clk_used;
+
+static uint32_t bpp_to_pixfmt(struct fb_info *fbi)
+{
+	uint32_t pixfmt = 0;
+
+	debug("bpp_to_pixfmt: %d\n", fbi->var.bits_per_pixel);
+
+	if (fbi->var.nonstd)
+		return fbi->var.nonstd;
+
+	switch (fbi->var.bits_per_pixel) {
+	case 24:
+		pixfmt = IPU_PIX_FMT_BGR24;
+		break;
+	case 32:
+		pixfmt = IPU_PIX_FMT_BGR32;
+		break;
+	case 16:
+		pixfmt = IPU_PIX_FMT_RGB565;
+		break;
+	}
+	return pixfmt;
+}
+
+/*
+ * Set fixed framebuffer parameters based on variable settings.
+ *
+ * @param       info     framebuffer information pointer
+ */
+static int mxcfb_set_fix(struct fb_info *info)
+{
+	struct fb_fix_screeninfo *fix = &info->fix;
+	struct fb_var_screeninfo *var = &info->var;
+
+	fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
+
+	fix->type = FB_TYPE_PACKED_PIXELS;
+	fix->accel = FB_ACCEL_NONE;
+	fix->visual = FB_VISUAL_TRUECOLOR;
+	fix->xpanstep = 1;
+	fix->ypanstep = 1;
+
+	return 0;
+}
+
+static int setup_disp_channel1(struct fb_info *fbi)
+{
+	ipu_channel_params_t params;
+	struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
+
+	memset(&params, 0, sizeof(params));
+	params.mem_dp_bg_sync.di = mxc_fbi->ipu_di;
+
+	debug("%s called\n", __func__);
+	/*
+	 * Assuming interlaced means yuv output, below setting also
+	 * valid for mem_dc_sync. FG should have the same vmode as BG.
+	 */
+	if (fbi->var.vmode & FB_VMODE_INTERLACED) {
+		params.mem_dp_bg_sync.interlaced = 1;
+		params.mem_dp_bg_sync.out_pixel_fmt =
+			IPU_PIX_FMT_YUV444;
+	} else {
+		if (mxc_fbi->ipu_di_pix_fmt) {
+			params.mem_dp_bg_sync.out_pixel_fmt =
+				mxc_fbi->ipu_di_pix_fmt;
+		} else {
+			params.mem_dp_bg_sync.out_pixel_fmt =
+				IPU_PIX_FMT_RGB666;
+		}
+	}
+	params.mem_dp_bg_sync.in_pixel_fmt = bpp_to_pixfmt(fbi);
+	if (mxc_fbi->alpha_chan_en)
+		params.mem_dp_bg_sync.alpha_chan_en = 1;
+
+	ipu_init_channel(mxc_fbi->ipu_ch, &params);
+
+	return 0;
+}
+
+static int setup_disp_channel2(struct fb_info *fbi)
+{
+	int retval = 0;
+	struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
+
+	mxc_fbi->cur_ipu_buf = 1;
+	if (mxc_fbi->alpha_chan_en)
+		mxc_fbi->cur_ipu_alpha_buf = 1;
+
+	fbi->var.xoffset = fbi->var.yoffset = 0;
+
+	debug("%s: %x %d %d %d %lx %lx\n",
+		__func__,
+		mxc_fbi->ipu_ch,
+		fbi->var.xres,
+		fbi->var.yres,
+		fbi->fix.line_length,
+		fbi->fix.smem_start,
+		fbi->fix.smem_start +
+		(fbi->fix.line_length * fbi->var.yres));
+
+	retval = ipu_init_channel_buffer(mxc_fbi->ipu_ch, IPU_INPUT_BUFFER,
+					 bpp_to_pixfmt(fbi),
+					 fbi->var.xres, fbi->var.yres,
+					 fbi->fix.line_length,
+					 fbi->fix.smem_start +
+					 (fbi->fix.line_length * fbi->var.yres),
+					 fbi->fix.smem_start,
+					 0, 0);
+	if (retval)
+		printf("ipu_init_channel_buffer error %d\n", retval);
+
+	return retval;
+}
+
+/*
+ * Set framebuffer parameters and change the operating mode.
+ *
+ * @param       info     framebuffer information pointer
+ */
+static int mxcfb_set_par(struct fb_info *fbi)
+{
+	int retval = 0;
+	u32 mem_len;
+	ipu_di_signal_cfg_t sig_cfg;
+	struct mxcfb_info *mxc_fbi = (struct mxcfb_info *)fbi->par;
+	uint32_t out_pixel_fmt;
+
+	ipu_disable_channel(mxc_fbi->ipu_ch);
+	ipu_uninit_channel(mxc_fbi->ipu_ch);
+	mxcfb_set_fix(fbi);
+
+	mem_len = fbi->var.yres_virtual * fbi->fix.line_length;
+	if (!fbi->fix.smem_start || (mem_len > fbi->fix.smem_len)) {
+		if (fbi->fix.smem_start)
+			mxcfb_unmap_video_memory(fbi);
+
+		if (mxcfb_map_video_memory(fbi) < 0)
+			return -ENOMEM;
+	}
+
+	setup_disp_channel1(fbi);
+
+	memset(&sig_cfg, 0, sizeof(sig_cfg));
+	if (fbi->var.vmode & FB_VMODE_INTERLACED) {
+		sig_cfg.interlaced = 1;
+		out_pixel_fmt = IPU_PIX_FMT_YUV444;
+	} else {
+		if (mxc_fbi->ipu_di_pix_fmt)
+			out_pixel_fmt = mxc_fbi->ipu_di_pix_fmt;
+		else
+			out_pixel_fmt = IPU_PIX_FMT_RGB666;
+	}
+	if (fbi->var.vmode & FB_VMODE_ODD_FLD_FIRST) /* PAL */
+		sig_cfg.odd_field_first = 1;
+	if ((fbi->var.sync & FB_SYNC_EXT) || ext_clk_used)
+		sig_cfg.ext_clk = 1;
+	if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
+		sig_cfg.Hsync_pol = 1;
+	if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
+		sig_cfg.Vsync_pol = 1;
+	if (!(fbi->var.sync & FB_SYNC_CLK_LAT_FALL))
+		sig_cfg.clk_pol = 1;
+	if (fbi->var.sync & FB_SYNC_DATA_INVERT)
+		sig_cfg.data_pol = 1;
+	if (!(fbi->var.sync & FB_SYNC_OE_LOW_ACT))
+		sig_cfg.enable_pol = 1;
+	if (fbi->var.sync & FB_SYNC_CLK_IDLE_EN)
+		sig_cfg.clkidle_en = 1;
+
+	debug("pixclock = %ul Hz\n",
+		(u32) (PICOS2KHZ(fbi->var.pixclock) * 1000UL));
+
+	if (ipu_init_sync_panel(mxc_fbi->ipu_di,
+				(PICOS2KHZ(fbi->var.pixclock)) * 1000UL,
+				fbi->var.xres, fbi->var.yres,
+				out_pixel_fmt,
+				fbi->var.left_margin,
+				fbi->var.hsync_len,
+				fbi->var.right_margin,
+				fbi->var.upper_margin,
+				fbi->var.vsync_len,
+				fbi->var.lower_margin,
+				0, sig_cfg) != 0) {
+		puts("mxcfb: Error initializing panel.\n");
+		return -EINVAL;
+	}
+
+	retval = setup_disp_channel2(fbi);
+	if (retval)
+		return retval;
+
+	if (mxc_fbi->blank == FB_BLANK_UNBLANK)
+		ipu_enable_channel(mxc_fbi->ipu_ch);
+
+	return retval;
+}
+
+/*
+ * Check framebuffer variable parameters and adjust to valid values.
+ *
+ * @param       var      framebuffer variable parameters
+ *
+ * @param       info     framebuffer information pointer
+ */
+static int mxcfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	u32 vtotal;
+	u32 htotal;
+
+	if (var->xres_virtual < var->xres)
+		var->xres_virtual = var->xres;
+	if (var->yres_virtual < var->yres)
+		var->yres_virtual = var->yres;
+
+	if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
+	    (var->bits_per_pixel != 16) && (var->bits_per_pixel != 8))
+		var->bits_per_pixel = default_bpp;
+
+	switch (var->bits_per_pixel) {
+	case 8:
+		var->red.length = 3;
+		var->red.offset = 5;
+		var->red.msb_right = 0;
+
+		var->green.length = 3;
+		var->green.offset = 2;
+		var->green.msb_right = 0;
+
+		var->blue.length = 2;
+		var->blue.offset = 0;
+		var->blue.msb_right = 0;
+
+		var->transp.length = 0;
+		var->transp.offset = 0;
+		var->transp.msb_right = 0;
+		break;
+	case 16:
+		var->red.length = 5;
+		var->red.offset = 11;
+		var->red.msb_right = 0;
+
+		var->green.length = 6;
+		var->green.offset = 5;
+		var->green.msb_right = 0;
+
+		var->blue.length = 5;
+		var->blue.offset = 0;
+		var->blue.msb_right = 0;
+
+		var->transp.length = 0;
+		var->transp.offset = 0;
+		var->transp.msb_right = 0;
+		break;
+	case 24:
+		var->red.length = 8;
+		var->red.offset = 16;
+		var->red.msb_right = 0;
+
+		var->green.length = 8;
+		var->green.offset = 8;
+		var->green.msb_right = 0;
+
+		var->blue.length = 8;
+		var->blue.offset = 0;
+		var->blue.msb_right = 0;
+
+		var->transp.length = 0;
+		var->transp.offset = 0;
+		var->transp.msb_right = 0;
+		break;
+	case 32:
+		var->red.length = 8;
+		var->red.offset = 16;
+		var->red.msb_right = 0;
+
+		var->green.length = 8;
+		var->green.offset = 8;
+		var->green.msb_right = 0;
+
+		var->blue.length = 8;
+		var->blue.offset = 0;
+		var->blue.msb_right = 0;
+
+		var->transp.length = 8;
+		var->transp.offset = 24;
+		var->transp.msb_right = 0;
+		break;
+	}
+
+	if (var->pixclock < 1000) {
+		htotal = var->xres + var->right_margin + var->hsync_len +
+		    var->left_margin;
+		vtotal = var->yres + var->lower_margin + var->vsync_len +
+		    var->upper_margin;
+		var->pixclock = (vtotal * htotal * 6UL) / 100UL;
+		var->pixclock = KHZ2PICOS(var->pixclock);
+		printf("pixclock set for 60Hz refresh = %u ps\n",
+			var->pixclock);
+	}
+
+	var->height = -1;
+	var->width = -1;
+	var->grayscale = 0;
+
+	return 0;
+}
+
+static int mxcfb_map_video_memory(struct fb_info *fbi)
+{
+	if (fbi->fix.smem_len < fbi->var.yres_virtual * fbi->fix.line_length) {
+		fbi->fix.smem_len = fbi->var.yres_virtual *
+				    fbi->fix.line_length;
+	}
+
+	fbi->screen_base = (char *)lcd_base;
+	fbi->fix.smem_start = (unsigned long)lcd_base;
+	if (fbi->screen_base == 0) {
+		puts("Unable to allocate framebuffer memory\n");
+		fbi->fix.smem_len = 0;
+		fbi->fix.smem_start = 0;
+		return -EBUSY;
+	}
+
+	debug("allocated fb @ paddr=0x%08X, size=%d.\n",
+		(uint32_t) fbi->fix.smem_start, fbi->fix.smem_len);
+
+	fbi->screen_size = fbi->fix.smem_len;
+
+	/* Clear the screen */
+	memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
+
+	return 0;
+}
+
+static int mxcfb_unmap_video_memory(struct fb_info *fbi)
+{
+	fbi->screen_base = 0;
+	fbi->fix.smem_start = 0;
+	fbi->fix.smem_len = 0;
+	return 0;
+}
+
+/*
+ * Initializes the framebuffer information pointer. After allocating
+ * sufficient memory for the framebuffer structure, the fields are
+ * filled with custom information passed in from the configurable
+ * structures.  This includes information such as bits per pixel,
+ * color maps, screen width/height and RGBA offsets.
+ *
+ * @return      Framebuffer structure initialized with our information
+ */
+static struct fb_info *mxcfb_init_fbinfo(void)
+{
+#define BYTES_PER_LONG 4
+#define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
+	struct fb_info *fbi;
+	struct mxcfb_info *mxcfbi;
+	char *p;
+	int size = sizeof(struct mxcfb_info) + PADDING +
+		sizeof(struct fb_info);
+
+	debug("%s: %d %d %d %d\n",
+		__func__,
+		PADDING,
+		size,
+		sizeof(struct mxcfb_info),
+		sizeof(struct fb_info));
+	/*
+	 * Allocate sufficient memory for the fb structure
+	 */
+
+	p = malloc(size);
+	if (!p)
+		return NULL;
+
+	memset(p, 0, size);
+
+	fbi = (struct fb_info *)p;
+	fbi->par = p + sizeof(struct fb_info) + PADDING;
+
+	mxcfbi = (struct mxcfb_info *)fbi->par;
+	debug("Framebuffer structures at: fbi=0x%x mxcfbi=0x%x\n",
+		(unsigned int)fbi, (unsigned int)mxcfbi);
+
+	fbi->var.activate = FB_ACTIVATE_NOW;
+
+	fbi->flags = FBINFO_FLAG_DEFAULT;
+	fbi->pseudo_palette = mxcfbi->pseudo_palette;
+
+	return fbi;
+}
+
+/*
+ * Probe routine for the framebuffer driver. It is called during the
+ * driver binding process.      The following functions are performed in
+ * this routine: Framebuffer initialization, Memory allocation and
+ * mapping, Framebuffer registration, IPU initialization.
+ *
+ * @return      Appropriate error code to the kernel common code
+ */
+static int mxcfb_probe(u32 interface_pix_fmt, struct fb_videomode *mode)
+{
+	struct fb_info *fbi;
+	struct mxcfb_info *mxcfbi;
+	int ret = 0;
+
+	/*
+	 * Initialize FB structures
+	 */
+	fbi = mxcfb_init_fbinfo();
+	if (!fbi) {
+		ret = -ENOMEM;
+		goto err0;
+	}
+	mxcfbi = (struct mxcfb_info *)fbi->par;
+
+	if (!g_dp_in_use) {
+		mxcfbi->ipu_ch = MEM_BG_SYNC;
+		mxcfbi->blank = FB_BLANK_UNBLANK;
+	} else {
+		mxcfbi->ipu_ch = MEM_DC_SYNC;
+		mxcfbi->blank = FB_BLANK_POWERDOWN;
+	}
+
+	mxcfbi->ipu_di = 0;
+
+	ipu_disp_set_global_alpha(mxcfbi->ipu_ch, 1, 0x80);
+	ipu_disp_set_color_key(mxcfbi->ipu_ch, 0, 0);
+	strcpy(fbi->fix.id, "DISP3 BG");
+
+	g_dp_in_use = 1;
+
+	mxcfb_info[mxcfbi->ipu_di] = fbi;
+
+	/* Need dummy values until real panel is configured */
+	fbi->var.xres = 640;
+	fbi->var.yres = 480;
+	fbi->var.bits_per_pixel = 16;
+
+	mxcfbi->ipu_di_pix_fmt = interface_pix_fmt;
+	fb_videomode_to_var(&fbi->var, mode);
+
+	mxcfb_check_var(&fbi->var, fbi);
+
+	/* Default Y virtual size is 2x panel size */
+	fbi->var.yres_virtual = fbi->var.yres * 2;
+
+	mxcfb_set_fix(fbi);
+
+	/* alocate fb first */
+	if (mxcfb_map_video_memory(fbi) < 0)
+		return -ENOMEM;
+
+	mxcfb_set_par(fbi);
+
+	/* Setting panel_info for lcd */
+	panel_info.cmap = NULL;
+	panel_info.vl_col = fbi->var.xres;
+	panel_info.vl_row = fbi->var.yres;
+	panel_info.vl_bpix = LCD_BPP;
+
+	lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8;
+
+	debug("MXC IPUV3 configured\n"
+		"XRES = %d YRES = %d BitsXpixel = %d\n",
+		panel_info.vl_col,
+		panel_info.vl_row,
+		panel_info.vl_bpix);
+
+	ipu_dump_registers();
+
+	return 0;
+
+err0:
+	return ret;
+}
+
+int overwrite_console(void)
+{
+	/* Keep stdout / stderr on serial, our LCD is for splashscreen only */
+	return 1;
+}
+
+void lcd_ctrl_init(void *lcdbase)
+{
+	u32 mem_len = panel_info.vl_col *
+		panel_info.vl_row *
+		NBITS(panel_info.vl_bpix) / 8;
+
+	/*
+	 * We rely on lcdbase being a physical address, i.e., either MMU off,
+	 * or 1-to-1 mapping. Might want to add some virt2phys here.
+	 */
+	if (!lcdbase)
+		return;
+
+	memset(lcdbase, 0, mem_len);
+}
+
+int mx51_fb_init(struct fb_videomode *mode)
+{
+	int ret;
+
+	ret = ipu_probe();
+	if (ret)
+		puts("Error initializing IPU\n");
+
+	lcd_base += 56;
+
+	debug("Framebuffer at 0x%x\n", (unsigned int)lcd_base);
+	ret = mxcfb_probe(IPU_PIX_FMT_RGB666, mode);
+
+	return ret;
+}