| /* |
| * 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. |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <linux/errno.h> |
| #include <asm/arch/crm_regs.h> |
| #include <asm/global_data.h> |
| #include <linux/string.h> |
| #include <linux/list.h> |
| #include <linux/fb.h> |
| #include <asm/io.h> |
| #include <malloc.h> |
| #include <video_fb.h> |
| #include "videomodes.h" |
| #include "ipu.h" |
| #include "mxcfb.h" |
| #include "ipu_regs.h" |
| |
| DECLARE_GLOBAL_DATA_PTR; |
| |
| static int mxcfb_map_video_memory(struct fb_info *fbi); |
| static int mxcfb_unmap_video_memory(struct fb_info *fbi); |
| |
| /* graphics setup */ |
| static GraphicDevice panel; |
| static struct fb_videomode const *gmode; |
| static uint8_t gdisp; |
| static uint32_t gpixfmt; |
| |
| static 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 = %lu Hz\n", 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->fix.smem_len = roundup(fbi->fix.smem_len, ARCH_DMA_MINALIGN); |
| fbi->screen_base = (char *)memalign(ARCH_DMA_MINALIGN, |
| fbi->fix.smem_len); |
| fbi->fix.smem_start = (unsigned long)fbi->screen_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; |
| |
| gd->fb_base = fbi->fix.smem_start; |
| |
| /* 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, uint8_t disp, |
| struct fb_videomode const *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 = disp; |
| |
| 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 */ |
| |
| mxcfbi->ipu_di_pix_fmt = interface_pix_fmt; |
| fb_videomode_to_var(&fbi->var, mode); |
| fbi->var.bits_per_pixel = 16; |
| fbi->fix.line_length = fbi->var.xres * (fbi->var.bits_per_pixel / 8); |
| fbi->fix.smem_len = fbi->var.yres_virtual * fbi->fix.line_length; |
| |
| 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); |
| |
| /* allocate fb first */ |
| if (mxcfb_map_video_memory(fbi) < 0) |
| return -ENOMEM; |
| |
| mxcfb_set_par(fbi); |
| |
| panel.winSizeX = mode->xres; |
| panel.winSizeY = mode->yres; |
| panel.plnSizeX = mode->xres; |
| panel.plnSizeY = mode->yres; |
| |
| panel.frameAdrs = (u32)fbi->screen_base; |
| panel.memSize = fbi->screen_size; |
| |
| panel.gdfBytesPP = 2; |
| panel.gdfIndex = GDF_16BIT_565RGB; |
| |
| ipu_dump_registers(); |
| |
| return 0; |
| |
| err0: |
| return ret; |
| } |
| |
| void ipuv3_fb_shutdown(void) |
| { |
| struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR; |
| struct ipu_stat *stat = (struct ipu_stat *)IPU_STAT; |
| u32 reg; |
| int i; |
| |
| /* |
| * Check if IPU clock was enabled before. Won't access |
| * IPU registers if clock is not enabled. |
| */ |
| reg = readl(&mxc_ccm->CCGR3); |
| if ((reg & MXC_CCM_CCGR3_IPU1_IPU_MASK) == 0) |
| return; |
| |
| for (i = 0; i < ARRAY_SIZE(mxcfb_info); i++) { |
| struct fb_info *fbi = mxcfb_info[i]; |
| if (fbi) { |
| struct mxcfb_info *mxc_fbi = fbi->par; |
| ipu_disable_channel(mxc_fbi->ipu_ch); |
| ipu_uninit_channel(mxc_fbi->ipu_ch); |
| } |
| } |
| for (i = 0; i < ARRAY_SIZE(stat->int_stat); i++) { |
| __raw_writel(__raw_readl(&stat->int_stat[i]), |
| &stat->int_stat[i]); |
| } |
| } |
| |
| void *video_hw_init(void) |
| { |
| int ret; |
| |
| ret = ipu_probe(); |
| if (ret) |
| puts("Error initializing IPU\n"); |
| |
| ret = mxcfb_probe(gpixfmt, gdisp, gmode); |
| debug("Framebuffer at 0x%x\n", (unsigned int)panel.frameAdrs); |
| |
| return (void *)&panel; |
| } |
| |
| int ipuv3_fb_init(struct fb_videomode const *mode, |
| uint8_t disp, |
| uint32_t pixfmt) |
| { |
| gmode = mode; |
| gdisp = disp; |
| gpixfmt = pixfmt; |
| |
| return 0; |
| } |