Edit File: clcd.h
/* * linux/include/asm-arm/hardware/amba_clcd.h -- Integrator LCD panel. * * David A Rusling * * Copyright (C) 2001 ARM Limited * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */ #include <linux/fb.h> /* * CLCD Controller Internal Register addresses */ #define CLCD_TIM0 0x00000000 #define CLCD_TIM1 0x00000004 #define CLCD_TIM2 0x00000008 #define CLCD_TIM3 0x0000000c #define CLCD_UBAS 0x00000010 #define CLCD_LBAS 0x00000014 #define CLCD_PL110_IENB 0x00000018 #define CLCD_PL110_CNTL 0x0000001c #define CLCD_PL110_STAT 0x00000020 #define CLCD_PL110_INTR 0x00000024 #define CLCD_PL110_UCUR 0x00000028 #define CLCD_PL110_LCUR 0x0000002C #define CLCD_PL111_CNTL 0x00000018 #define CLCD_PL111_IENB 0x0000001c #define CLCD_PL111_RIS 0x00000020 #define CLCD_PL111_MIS 0x00000024 #define CLCD_PL111_ICR 0x00000028 #define CLCD_PL111_UCUR 0x0000002c #define CLCD_PL111_LCUR 0x00000030 #define CLCD_PALL 0x00000200 #define CLCD_PALETTE 0x00000200 #define TIM2_CLKSEL (1 << 5) #define TIM2_IVS (1 << 11) #define TIM2_IHS (1 << 12) #define TIM2_IPC (1 << 13) #define TIM2_IOE (1 << 14) #define TIM2_BCD (1 << 26) #define CNTL_LCDEN (1 << 0) #define CNTL_LCDBPP1 (0 << 1) #define CNTL_LCDBPP2 (1 << 1) #define CNTL_LCDBPP4 (2 << 1) #define CNTL_LCDBPP8 (3 << 1) #define CNTL_LCDBPP16 (4 << 1) #define CNTL_LCDBPP16_565 (6 << 1) #define CNTL_LCDBPP16_444 (7 << 1) #define CNTL_LCDBPP24 (5 << 1) #define CNTL_LCDBW (1 << 4) #define CNTL_LCDTFT (1 << 5) #define CNTL_LCDMONO8 (1 << 6) #define CNTL_LCDDUAL (1 << 7) #define CNTL_BGR (1 << 8) #define CNTL_BEBO (1 << 9) #define CNTL_BEPO (1 << 10) #define CNTL_LCDPWR (1 << 11) #define CNTL_LCDVCOMP(x) ((x) << 12) #define CNTL_LDMAFIFOTIME (1 << 15) #define CNTL_WATERMARK (1 << 16) enum { /* individual formats */ CLCD_CAP_RGB444 = (1 << 0), CLCD_CAP_RGB5551 = (1 << 1), CLCD_CAP_RGB565 = (1 << 2), CLCD_CAP_RGB888 = (1 << 3), CLCD_CAP_BGR444 = (1 << 4), CLCD_CAP_BGR5551 = (1 << 5), CLCD_CAP_BGR565 = (1 << 6), CLCD_CAP_BGR888 = (1 << 7), /* connection layouts */ CLCD_CAP_444 = CLCD_CAP_RGB444 | CLCD_CAP_BGR444, CLCD_CAP_5551 = CLCD_CAP_RGB5551 | CLCD_CAP_BGR5551, CLCD_CAP_565 = CLCD_CAP_RGB565 | CLCD_CAP_BGR565, CLCD_CAP_888 = CLCD_CAP_RGB888 | CLCD_CAP_BGR888, /* red/blue ordering */ CLCD_CAP_RGB = CLCD_CAP_RGB444 | CLCD_CAP_RGB5551 | CLCD_CAP_RGB565 | CLCD_CAP_RGB888, CLCD_CAP_BGR = CLCD_CAP_BGR444 | CLCD_CAP_BGR5551 | CLCD_CAP_BGR565 | CLCD_CAP_BGR888, CLCD_CAP_ALL = CLCD_CAP_BGR | CLCD_CAP_RGB, }; struct clcd_panel { struct fb_videomode mode; signed short width; /* width in mm */ signed short height; /* height in mm */ u32 tim2; u32 tim3; u32 cntl; u32 caps; unsigned int bpp:8, fixedtimings:1, grayscale:1; unsigned int connector; }; struct clcd_regs { u32 tim0; u32 tim1; u32 tim2; u32 tim3; u32 cntl; unsigned long pixclock; }; struct clcd_fb; /* * the board-type specific routines */ struct clcd_board { const char *name; /* * Optional. Hardware capability flags. */ u32 caps; /* * Optional. Check whether the var structure is acceptable * for this display. */ int (*check)(struct clcd_fb *fb, struct fb_var_screeninfo *var); /* * Compulsory. Decode fb->fb.var into regs->*. In the case of * fixed timing, set regs->* to the register values required. */ void (*decode)(struct clcd_fb *fb, struct clcd_regs *regs); /* * Optional. Disable any extra display hardware. */ void (*disable)(struct clcd_fb *); /* * Optional. Enable any extra display hardware. */ void (*enable)(struct clcd_fb *); /* * Setup platform specific parts of CLCD driver */ int (*setup)(struct clcd_fb *); /* * mmap the framebuffer memory */ int (*mmap)(struct clcd_fb *, struct vm_area_struct *); /* * Remove platform specific parts of CLCD driver */ void (*remove)(struct clcd_fb *); }; struct amba_device; struct clk; /* this data structure describes each frame buffer device we find */ struct clcd_fb { struct fb_info fb; struct amba_device *dev; struct clk *clk; struct clcd_panel *panel; struct clcd_board *board; void *board_data; void __iomem *regs; u16 off_ienb; u16 off_cntl; u32 clcd_cntl; u32 cmap[16]; bool clk_enabled; }; static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs) { struct fb_var_screeninfo *var = &fb->fb.var; u32 val, cpl; /* * Program the CLCD controller registers and start the CLCD */ val = ((var->xres / 16) - 1) << 2; val |= (var->hsync_len - 1) << 8; val |= (var->right_margin - 1) << 16; val |= (var->left_margin - 1) << 24; regs->tim0 = val; val = var->yres; if (fb->panel->cntl & CNTL_LCDDUAL) val /= 2; val -= 1; val |= (var->vsync_len - 1) << 10; val |= var->lower_margin << 16; val |= var->upper_margin << 24; regs->tim1 = val; val = fb->panel->tim2; val |= var->sync & FB_SYNC_HOR_HIGH_ACT ? 0 : TIM2_IHS; val |= var->sync & FB_SYNC_VERT_HIGH_ACT ? 0 : TIM2_IVS; cpl = var->xres_virtual; if (fb->panel->cntl & CNTL_LCDTFT) /* TFT */ /* / 1 */; else if (!var->grayscale) /* STN color */ cpl = cpl * 8 / 3; else if (fb->panel->cntl & CNTL_LCDMONO8) /* STN monochrome, 8bit */ cpl /= 8; else /* STN monochrome, 4bit */ cpl /= 4; regs->tim2 = val | ((cpl - 1) << 16); regs->tim3 = fb->panel->tim3; val = fb->panel->cntl; if (var->grayscale) val |= CNTL_LCDBW; if (fb->panel->caps && fb->board->caps && var->bits_per_pixel >= 16) { /* * if board and panel supply capabilities, we can support * changing BGR/RGB depending on supplied parameters */ if (var->red.offset == 0) val &= ~CNTL_BGR; else val |= CNTL_BGR; } switch (var->bits_per_pixel) { case 1: val |= CNTL_LCDBPP1; break; case 2: val |= CNTL_LCDBPP2; break; case 4: val |= CNTL_LCDBPP4; break; case 8: val |= CNTL_LCDBPP8; break; case 16: /* * PL110 cannot choose between 5551 and 565 modes in its * control register. It is possible to use 565 with * custom external wiring. */ if (amba_part(fb->dev) == 0x110 || var->green.length == 5) val |= CNTL_LCDBPP16; else if (var->green.length == 6) val |= CNTL_LCDBPP16_565; else val |= CNTL_LCDBPP16_444; break; case 32: val |= CNTL_LCDBPP24; break; } regs->cntl = val; regs->pixclock = var->pixclock; } static inline int clcdfb_check(struct clcd_fb *fb, struct fb_var_screeninfo *var) { var->xres_virtual = var->xres = (var->xres + 15) & ~15; var->yres_virtual = var->yres = (var->yres + 1) & ~1; #define CHECK(e,l,h) (var->e < l || var->e > h) if (CHECK(right_margin, (5+1), 256) || /* back porch */ CHECK(left_margin, (5+1), 256) || /* front porch */ CHECK(hsync_len, (5+1), 256) || var->xres > 4096 || var->lower_margin > 255 || /* back porch */ var->upper_margin > 255 || /* front porch */ var->vsync_len > 32 || var->yres > 1024) return -EINVAL; #undef CHECK /* single panel mode: PCD = max(PCD, 1) */ /* dual panel mode: PCD = max(PCD, 5) */ /* * You can't change the grayscale setting, and * we can only do non-interlaced video. */ if (var->grayscale != fb->fb.var.grayscale || (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED) return -EINVAL; #define CHECK(e) (var->e != fb->fb.var.e) if (fb->panel->fixedtimings && (CHECK(xres) || CHECK(yres) || CHECK(bits_per_pixel) || CHECK(pixclock) || CHECK(left_margin) || CHECK(right_margin) || CHECK(upper_margin) || CHECK(lower_margin) || CHECK(hsync_len) || CHECK(vsync_len) || CHECK(sync))) return -EINVAL; #undef CHECK var->nonstd = 0; var->accel_flags = 0; return 0; }