diff options
Diffstat (limited to 'include/linux/amba/clcd.h')
| -rw-r--r-- | include/linux/amba/clcd.h | 271 |
1 files changed, 271 insertions, 0 deletions
diff --git a/include/linux/amba/clcd.h b/include/linux/amba/clcd.h new file mode 100644 index 00000000000..6b8d73dc1ab --- /dev/null +++ b/include/linux/amba/clcd.h @@ -0,0 +1,271 @@ +/* + * 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/config.h> +#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 + +#if !defined(CONFIG_ARCH_VERSATILE) && !defined(CONFIG_ARCH_REALVIEW) +#define CLCD_IENB 0x00000018 +#define CLCD_CNTL 0x0000001c +#else +/* + * Someone rearranged these two registers on the Versatile + * platform... + */ +#define CLCD_IENB 0x0000001c +#define CLCD_CNTL 0x00000018 +#endif + +#define CLCD_STAT 0x00000020 +#define CLCD_INTR 0x00000024 +#define CLCD_UCUR 0x00000028 +#define CLCD_LCUR 0x0000002C +#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_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) + +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; + 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. Check whether the var structure is acceptable + * for this display. + */ + int (*check)(struct clcd_fb *fb, struct fb_var_screeninfo *var); + + /* + * Compulsary. 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; + u32 clcd_cntl; + u32 cmap[16]; +}; + +static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs) +{ + u32 val, cpl; + + /* + * Program the CLCD controller registers and start the CLCD + */ + val = ((fb->fb.var.xres / 16) - 1) << 2; + val |= (fb->fb.var.hsync_len - 1) << 8; + val |= (fb->fb.var.right_margin - 1) << 16; + val |= (fb->fb.var.left_margin - 1) << 24; + regs->tim0 = val; + + val = fb->fb.var.yres; + if (fb->panel->cntl & CNTL_LCDDUAL) + val /= 2; + val -= 1; + val |= (fb->fb.var.vsync_len - 1) << 10; + val |= fb->fb.var.lower_margin << 16; + val |= fb->fb.var.upper_margin << 24; + regs->tim1 = val; + + val = fb->panel->tim2; + val |= fb->fb.var.sync & FB_SYNC_HOR_HIGH_ACT ? 0 : TIM2_IHS; + val |= fb->fb.var.sync & FB_SYNC_VERT_HIGH_ACT ? 0 : TIM2_IVS; + + cpl = fb->fb.var.xres_virtual; + if (fb->panel->cntl & CNTL_LCDTFT) /* TFT */ + /* / 1 */; + else if (!fb->fb.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 (fb->fb.var.grayscale) + val |= CNTL_LCDBW; + + switch (fb->fb.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: + val |= CNTL_LCDBPP16; + break; + case 32: + val |= CNTL_LCDBPP24; + break; + } + + regs->cntl = val; + regs->pixclock = fb->fb.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; +} |