u-boot/drivers/video/mxc_ipuv3_fb.c

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/*
* 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;
}