--- /dev/null
+/*
+ * 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(¶ms, 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, ¶ms);
+
+ 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;
+}
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