2 * linux/include/asm-arm/hardware/amba_clcd.h -- Integrator LCD panel.
6 * Copyright (C) 2001 ARM Limited
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive
15 * CLCD Controller Internal Register addresses
17 #define CLCD_TIM0 0x00000000
18 #define CLCD_TIM1 0x00000004
19 #define CLCD_TIM2 0x00000008
20 #define CLCD_TIM3 0x0000000c
21 #define CLCD_UBAS 0x00000010
22 #define CLCD_LBAS 0x00000014
24 #define CLCD_PL110_IENB 0x00000018
25 #define CLCD_PL110_CNTL 0x0000001c
26 #define CLCD_PL110_STAT 0x00000020
27 #define CLCD_PL110_INTR 0x00000024
28 #define CLCD_PL110_UCUR 0x00000028
29 #define CLCD_PL110_LCUR 0x0000002C
31 #define CLCD_PL111_CNTL 0x00000018
32 #define CLCD_PL111_IENB 0x0000001c
33 #define CLCD_PL111_RIS 0x00000020
34 #define CLCD_PL111_MIS 0x00000024
35 #define CLCD_PL111_ICR 0x00000028
36 #define CLCD_PL111_UCUR 0x0000002c
37 #define CLCD_PL111_LCUR 0x00000030
39 #define CLCD_PALL 0x00000200
40 #define CLCD_PALETTE 0x00000200
42 #define TIM2_CLKSEL (1 << 5)
43 #define TIM2_IVS (1 << 11)
44 #define TIM2_IHS (1 << 12)
45 #define TIM2_IPC (1 << 13)
46 #define TIM2_IOE (1 << 14)
47 #define TIM2_BCD (1 << 26)
49 #define CNTL_LCDEN (1 << 0)
50 #define CNTL_LCDBPP1 (0 << 1)
51 #define CNTL_LCDBPP2 (1 << 1)
52 #define CNTL_LCDBPP4 (2 << 1)
53 #define CNTL_LCDBPP8 (3 << 1)
54 #define CNTL_LCDBPP16 (4 << 1)
55 #define CNTL_LCDBPP16_565 (6 << 1)
56 #define CNTL_LCDBPP16_444 (7 << 1)
57 #define CNTL_LCDBPP24 (5 << 1)
58 #define CNTL_LCDBW (1 << 4)
59 #define CNTL_LCDTFT (1 << 5)
60 #define CNTL_LCDMONO8 (1 << 6)
61 #define CNTL_LCDDUAL (1 << 7)
62 #define CNTL_BGR (1 << 8)
63 #define CNTL_BEBO (1 << 9)
64 #define CNTL_BEPO (1 << 10)
65 #define CNTL_LCDPWR (1 << 11)
66 #define CNTL_LCDVCOMP(x) ((x) << 12)
67 #define CNTL_LDMAFIFOTIME (1 << 15)
68 #define CNTL_WATERMARK (1 << 16)
71 /* individual formats */
72 CLCD_CAP_RGB444 = (1 << 0),
73 CLCD_CAP_RGB5551 = (1 << 1),
74 CLCD_CAP_RGB565 = (1 << 2),
75 CLCD_CAP_RGB888 = (1 << 3),
76 CLCD_CAP_BGR444 = (1 << 4),
77 CLCD_CAP_BGR5551 = (1 << 5),
78 CLCD_CAP_BGR565 = (1 << 6),
79 CLCD_CAP_BGR888 = (1 << 7),
81 /* connection layouts */
82 CLCD_CAP_444 = CLCD_CAP_RGB444 | CLCD_CAP_BGR444,
83 CLCD_CAP_5551 = CLCD_CAP_RGB5551 | CLCD_CAP_BGR5551,
84 CLCD_CAP_565 = CLCD_CAP_RGB565 | CLCD_CAP_BGR565,
85 CLCD_CAP_888 = CLCD_CAP_RGB888 | CLCD_CAP_BGR888,
87 /* red/blue ordering */
88 CLCD_CAP_RGB = CLCD_CAP_RGB444 | CLCD_CAP_RGB5551 |
89 CLCD_CAP_RGB565 | CLCD_CAP_RGB888,
90 CLCD_CAP_BGR = CLCD_CAP_BGR444 | CLCD_CAP_BGR5551 |
91 CLCD_CAP_BGR565 | CLCD_CAP_BGR888,
93 CLCD_CAP_ALL = CLCD_CAP_BGR | CLCD_CAP_RGB,
97 struct fb_videomode mode;
98 signed short width; /* width in mm */
99 signed short height; /* height in mm */
107 unsigned int connector;
116 unsigned long pixclock;
122 * the board-type specific routines
128 * Optional. Hardware capability flags.
133 * Optional. Check whether the var structure is acceptable
136 int (*check)(struct clcd_fb *fb, struct fb_var_screeninfo *var);
139 * Compulsory. Decode fb->fb.var into regs->*. In the case of
140 * fixed timing, set regs->* to the register values required.
142 void (*decode)(struct clcd_fb *fb, struct clcd_regs *regs);
145 * Optional. Disable any extra display hardware.
147 void (*disable)(struct clcd_fb *);
150 * Optional. Enable any extra display hardware.
152 void (*enable)(struct clcd_fb *);
155 * Setup platform specific parts of CLCD driver
157 int (*setup)(struct clcd_fb *);
160 * mmap the framebuffer memory
162 int (*mmap)(struct clcd_fb *, struct vm_area_struct *);
165 * Remove platform specific parts of CLCD driver
167 void (*remove)(struct clcd_fb *);
173 /* this data structure describes each frame buffer device we find */
176 struct amba_device *dev;
178 struct clcd_panel *panel;
179 struct clcd_board *board;
189 static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs)
191 struct fb_var_screeninfo *var = &fb->fb.var;
195 * Program the CLCD controller registers and start the CLCD
197 val = ((var->xres / 16) - 1) << 2;
198 val |= (var->hsync_len - 1) << 8;
199 val |= (var->right_margin - 1) << 16;
200 val |= (var->left_margin - 1) << 24;
204 if (fb->panel->cntl & CNTL_LCDDUAL)
207 val |= (var->vsync_len - 1) << 10;
208 val |= var->lower_margin << 16;
209 val |= var->upper_margin << 24;
212 val = fb->panel->tim2;
213 val |= var->sync & FB_SYNC_HOR_HIGH_ACT ? 0 : TIM2_IHS;
214 val |= var->sync & FB_SYNC_VERT_HIGH_ACT ? 0 : TIM2_IVS;
216 cpl = var->xres_virtual;
217 if (fb->panel->cntl & CNTL_LCDTFT) /* TFT */
219 else if (!var->grayscale) /* STN color */
221 else if (fb->panel->cntl & CNTL_LCDMONO8) /* STN monochrome, 8bit */
223 else /* STN monochrome, 4bit */
226 regs->tim2 = val | ((cpl - 1) << 16);
228 regs->tim3 = fb->panel->tim3;
230 val = fb->panel->cntl;
234 if (fb->panel->caps && fb->board->caps &&
235 var->bits_per_pixel >= 16) {
237 * if board and panel supply capabilities, we can support
238 * changing BGR/RGB depending on supplied parameters
240 if (var->red.offset == 0)
246 switch (var->bits_per_pixel) {
261 * PL110 cannot choose between 5551 and 565 modes in its
262 * control register. It is possible to use 565 with
263 * custom external wiring.
265 if (amba_part(fb->dev) == 0x110 ||
266 var->green.length == 5)
267 val |= CNTL_LCDBPP16;
268 else if (var->green.length == 6)
269 val |= CNTL_LCDBPP16_565;
271 val |= CNTL_LCDBPP16_444;
274 val |= CNTL_LCDBPP24;
279 regs->pixclock = var->pixclock;
282 static inline int clcdfb_check(struct clcd_fb *fb, struct fb_var_screeninfo *var)
284 var->xres_virtual = var->xres = (var->xres + 15) & ~15;
285 var->yres_virtual = var->yres = (var->yres + 1) & ~1;
287 #define CHECK(e,l,h) (var->e < l || var->e > h)
288 if (CHECK(right_margin, (5+1), 256) || /* back porch */
289 CHECK(left_margin, (5+1), 256) || /* front porch */
290 CHECK(hsync_len, (5+1), 256) ||
292 var->lower_margin > 255 || /* back porch */
293 var->upper_margin > 255 || /* front porch */
294 var->vsync_len > 32 ||
299 /* single panel mode: PCD = max(PCD, 1) */
300 /* dual panel mode: PCD = max(PCD, 5) */
303 * You can't change the grayscale setting, and
304 * we can only do non-interlaced video.
306 if (var->grayscale != fb->fb.var.grayscale ||
307 (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
310 #define CHECK(e) (var->e != fb->fb.var.e)
311 if (fb->panel->fixedtimings &&
314 CHECK(bits_per_pixel) ||
316 CHECK(left_margin) ||
317 CHECK(right_margin) ||
318 CHECK(upper_margin) ||
319 CHECK(lower_margin) ||
327 var->accel_flags = 0;