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)
70 /* ST Microelectronics variant bits */
71 #define CNTL_ST_1XBPP_444 0x0
72 #define CNTL_ST_1XBPP_5551 (1 << 17)
73 #define CNTL_ST_1XBPP_565 (1 << 18)
74 #define CNTL_ST_CDWID_12 0x0
75 #define CNTL_ST_CDWID_16 (1 << 19)
76 #define CNTL_ST_CDWID_18 (1 << 20)
77 #define CNTL_ST_CDWID_24 ((1 << 19)|(1 << 20))
78 #define CNTL_ST_CEAEN (1 << 21)
79 #define CNTL_ST_LCDBPP24_PACKED (6 << 1)
82 /* individual formats */
83 CLCD_CAP_RGB444 = (1 << 0),
84 CLCD_CAP_RGB5551 = (1 << 1),
85 CLCD_CAP_RGB565 = (1 << 2),
86 CLCD_CAP_RGB888 = (1 << 3),
87 CLCD_CAP_BGR444 = (1 << 4),
88 CLCD_CAP_BGR5551 = (1 << 5),
89 CLCD_CAP_BGR565 = (1 << 6),
90 CLCD_CAP_BGR888 = (1 << 7),
92 /* connection layouts */
93 CLCD_CAP_444 = CLCD_CAP_RGB444 | CLCD_CAP_BGR444,
94 CLCD_CAP_5551 = CLCD_CAP_RGB5551 | CLCD_CAP_BGR5551,
95 CLCD_CAP_565 = CLCD_CAP_RGB565 | CLCD_CAP_BGR565,
96 CLCD_CAP_888 = CLCD_CAP_RGB888 | CLCD_CAP_BGR888,
98 /* red/blue ordering */
99 CLCD_CAP_RGB = CLCD_CAP_RGB444 | CLCD_CAP_RGB5551 |
100 CLCD_CAP_RGB565 | CLCD_CAP_RGB888,
101 CLCD_CAP_BGR = CLCD_CAP_BGR444 | CLCD_CAP_BGR5551 |
102 CLCD_CAP_BGR565 | CLCD_CAP_BGR888,
104 CLCD_CAP_ALL = CLCD_CAP_BGR | CLCD_CAP_RGB,
107 struct backlight_device;
110 struct fb_videomode mode;
111 signed short width; /* width in mm */
112 signed short height; /* height in mm */
120 unsigned int connector;
121 struct backlight_device *backlight;
123 * If the B/R lines are switched between the CLCD
124 * and the panel we need to know this and not try to
125 * compensate with the BGR bit in the control register.
136 unsigned long pixclock;
142 * the board-type specific routines
148 * Optional. Hardware capability flags.
153 * Optional. Check whether the var structure is acceptable
156 int (*check)(struct clcd_fb *fb, struct fb_var_screeninfo *var);
159 * Compulsory. Decode fb->fb.var into regs->*. In the case of
160 * fixed timing, set regs->* to the register values required.
162 void (*decode)(struct clcd_fb *fb, struct clcd_regs *regs);
165 * Optional. Disable any extra display hardware.
167 void (*disable)(struct clcd_fb *);
170 * Optional. Enable any extra display hardware.
172 void (*enable)(struct clcd_fb *);
175 * Setup platform specific parts of CLCD driver
177 int (*setup)(struct clcd_fb *);
180 * mmap the framebuffer memory
182 int (*mmap)(struct clcd_fb *, struct vm_area_struct *);
185 * Remove platform specific parts of CLCD driver
187 void (*remove)(struct clcd_fb *);
194 * struct clcd_vendor_data - holds hardware (IP-block) vendor-specific
195 * variant information
197 * @clock_timregs: the CLCD needs to be clocked when accessing the
198 * timer registers, or the hardware will hang.
199 * @packed_24_bit_pixels: this variant supports 24bit packed pixel data,
200 * so that RGB accesses 3 bytes at a time, not just on even 32bit
201 * boundaries, packing the pixel data in memory. ST Microelectronics
203 * @st_bitmux_control: ST Microelectronics have implemented output
204 * bit line multiplexing into the CLCD control register. This indicates
205 * that we need to use this.
206 * @init_board: custom board init function for this variant
207 * @init_panel: custom panel init function for this variant
209 struct clcd_vendor_data {
211 bool packed_24_bit_pixels;
212 bool st_bitmux_control;
213 int (*init_board)(struct amba_device *adev,
214 struct clcd_board *board);
215 int (*init_panel)(struct clcd_fb *fb,
216 struct device_node *panel);
219 /* this data structure describes each frame buffer device we find */
222 struct amba_device *dev;
224 struct clcd_vendor_data *vendor;
225 struct clcd_panel *panel;
226 struct clcd_board *board;
236 static inline void clcdfb_decode(struct clcd_fb *fb, struct clcd_regs *regs)
238 struct fb_var_screeninfo *var = &fb->fb.var;
242 * Program the CLCD controller registers and start the CLCD
244 val = ((var->xres / 16) - 1) << 2;
245 val |= (var->hsync_len - 1) << 8;
246 val |= (var->right_margin - 1) << 16;
247 val |= (var->left_margin - 1) << 24;
251 if (fb->panel->cntl & CNTL_LCDDUAL)
254 val |= (var->vsync_len - 1) << 10;
255 val |= var->lower_margin << 16;
256 val |= var->upper_margin << 24;
259 val = fb->panel->tim2;
260 val |= var->sync & FB_SYNC_HOR_HIGH_ACT ? 0 : TIM2_IHS;
261 val |= var->sync & FB_SYNC_VERT_HIGH_ACT ? 0 : TIM2_IVS;
263 cpl = var->xres_virtual;
264 if (fb->panel->cntl & CNTL_LCDTFT) /* TFT */
266 else if (!var->grayscale) /* STN color */
268 else if (fb->panel->cntl & CNTL_LCDMONO8) /* STN monochrome, 8bit */
270 else /* STN monochrome, 4bit */
273 regs->tim2 = val | ((cpl - 1) << 16);
275 regs->tim3 = fb->panel->tim3;
277 val = fb->panel->cntl;
281 if (fb->panel->caps && fb->board->caps && var->bits_per_pixel >= 16) {
283 * if board and panel supply capabilities, we can support
284 * changing BGR/RGB depending on supplied parameters. Here
285 * we switch to what the framebuffer is providing if need
286 * be, so if the framebuffer is BGR but the display connection
287 * is RGB (first case) we switch it around. Vice versa mutatis
288 * mutandis if the framebuffer is RGB but the display connection
289 * is BGR, we flip it around.
291 if (var->red.offset == 0)
295 if (fb->panel->bgr_connection)
299 switch (var->bits_per_pixel) {
314 * PL110 cannot choose between 5551 and 565 modes in its
315 * control register. It is possible to use 565 with
316 * custom external wiring.
318 if (amba_part(fb->dev) == 0x110 ||
319 var->green.length == 5)
320 val |= CNTL_LCDBPP16;
321 else if (var->green.length == 6)
322 val |= CNTL_LCDBPP16_565;
324 val |= CNTL_LCDBPP16_444;
327 /* Modified variant supporting 24 bit packed pixels */
328 val |= CNTL_ST_LCDBPP24_PACKED;
331 val |= CNTL_LCDBPP24;
336 regs->pixclock = var->pixclock;
339 static inline int clcdfb_check(struct clcd_fb *fb, struct fb_var_screeninfo *var)
341 var->xres_virtual = var->xres = (var->xres + 15) & ~15;
342 var->yres_virtual = var->yres = (var->yres + 1) & ~1;
344 #define CHECK(e,l,h) (var->e < l || var->e > h)
345 if (CHECK(right_margin, (5+1), 256) || /* back porch */
346 CHECK(left_margin, (5+1), 256) || /* front porch */
347 CHECK(hsync_len, (5+1), 256) ||
349 var->lower_margin > 255 || /* back porch */
350 var->upper_margin > 255 || /* front porch */
351 var->vsync_len > 32 ||
356 /* single panel mode: PCD = max(PCD, 1) */
357 /* dual panel mode: PCD = max(PCD, 5) */
360 * You can't change the grayscale setting, and
361 * we can only do non-interlaced video.
363 if (var->grayscale != fb->fb.var.grayscale ||
364 (var->vmode & FB_VMODE_MASK) != FB_VMODE_NONINTERLACED)
367 #define CHECK(e) (var->e != fb->fb.var.e)
368 if (fb->panel->fixedtimings &&
371 CHECK(bits_per_pixel) ||
373 CHECK(left_margin) ||
374 CHECK(right_margin) ||
375 CHECK(upper_margin) ||
376 CHECK(lower_margin) ||
384 var->accel_flags = 0;