1 /* 2 * JzRISC lcd controller 3 * 4 * Copyright (C) Xiangfu Liu <xiangfu@sharism.cc> 5 * Copyright (C) 2015 Paul Boddie <paul@boddie.org.uk> 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of 10 * the License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 20 * MA 02111-1307 USA 21 */ 22 23 /* virt_to_phys() from u-boot/arch/mips/include/asm/addrspace.h 24 via u-boot/arch/mips/include/asm/io.h */ 25 #define virt_to_phys(n) (((int) n) & 0x1fffffff) 26 27 #include "jz4740.h" 28 #include "nanonote_gpm940b0.h" 29 #include "board-nanonote.h" 30 31 #define align2(n) (n)=((((n)+1)>>1)<<1) 32 #define align4(n) (n)=((((n)+3)>>2)<<2) 33 #define align8(n) (n)=((((n)+7)>>3)<<3) 34 35 struct jzfb_info { 36 unsigned int cfg; /* panel mode and pin usage etc. */ 37 unsigned int w; 38 unsigned int h; 39 unsigned int bpp; /* bit per pixel */ 40 unsigned int fclk; /* frame clk */ 41 unsigned int hsw; /* hsync width, in pclk */ 42 unsigned int vsw; /* vsync width, in line count */ 43 unsigned int elw; /* end of line, in pclk */ 44 unsigned int blw; /* begin of line, in pclk */ 45 unsigned int efw; /* end of frame, in line count */ 46 unsigned int bfw; /* begin of frame, in line count */ 47 }; 48 49 static struct jzfb_info jzfb = { 50 MODE_8BIT_SERIAL_TFT | PCLK_N | HSYNC_N | VSYNC_N, 51 320, 240, 32, 70, 1, 1, 273, 140, 1, 20 52 }; 53 54 vidinfo_t panel_info = { 55 320, 240, LCD_BPP, 56 }; 57 58 unsigned long lcd_get_size(void) 59 { 60 int line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8; 61 return line_length * panel_info.vl_row; 62 } 63 64 static int jz_lcd_init_mem(void *lcdbase, vidinfo_t *vid); 65 static void jz_lcd_desc_init(vidinfo_t *vid); 66 static int jz_lcd_hw_init(vidinfo_t *vid); 67 68 void lcd_ctrl_init (void *lcdbase) 69 { 70 jz_lcd_init_mem(lcdbase, &panel_info); 71 jz_lcd_desc_init(&panel_info); 72 jz_lcd_hw_init(&panel_info); 73 } 74 75 /* 76 * Before enabled lcd controller, lcd registers should be configured correctly. 77 */ 78 void lcd_enable (void) 79 { 80 REG_LCD_CTRL &= ~(1<<4); /* LCDCTRL.DIS */ 81 REG_LCD_CTRL |= 1<<3; /* LCDCTRL.ENA*/ 82 } 83 84 void lcd_disable (void) 85 { 86 REG_LCD_CTRL |= (1<<4); /* LCDCTRL.DIS, regular disable */ 87 /* REG_LCD_CTRL |= (1<<3); */ /* LCDCTRL.DIS, quikly disable */ 88 } 89 90 static int jz_lcd_init_mem(void *lcdbase, vidinfo_t *vid) 91 { 92 unsigned long palette_mem_size; 93 struct jz_fb_info *fbi = &vid->jz_fb; 94 int fb_size = vid->vl_row * (vid->vl_col * NBITS (vid->vl_bpix)) / 8; 95 96 fbi->screen = (unsigned long)lcdbase; 97 fbi->palette_size = 256; 98 palette_mem_size = fbi->palette_size * sizeof(u16); 99 100 /* debug("jz_lcd.c palette_mem_size = 0x%08lx\n", (unsigned long) palette_mem_size); */ 101 /* locate palette and descs at end of page following fb */ 102 fbi->palette = (unsigned long)lcdbase + fb_size + PAGE_SIZE - palette_mem_size; 103 104 return 0; 105 } 106 107 static void jz_lcd_desc_init(vidinfo_t *vid) 108 { 109 struct jz_fb_info * fbi; 110 fbi = &vid->jz_fb; 111 fbi->dmadesc_fblow = (struct jz_fb_dma_descriptor *)((unsigned int)fbi->palette - 3*16); 112 fbi->dmadesc_fbhigh = (struct jz_fb_dma_descriptor *)((unsigned int)fbi->palette - 2*16); 113 fbi->dmadesc_palette = (struct jz_fb_dma_descriptor *)((unsigned int)fbi->palette - 1*16); 114 115 #define BYTES_PER_PANEL (vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8) 116 117 /* populate descriptors */ 118 fbi->dmadesc_fblow->fdadr = virt_to_phys(fbi->dmadesc_fblow); 119 fbi->dmadesc_fblow->fsadr = virt_to_phys((void *)(fbi->screen + BYTES_PER_PANEL)); 120 fbi->dmadesc_fblow->fidr = 0; 121 fbi->dmadesc_fblow->ldcmd = BYTES_PER_PANEL / 4 ; 122 123 fbi->fdadr1 = virt_to_phys(fbi->dmadesc_fblow); /* only used in dual-panel mode */ 124 125 fbi->dmadesc_fbhigh->fsadr = virt_to_phys((void *)fbi->screen); 126 fbi->dmadesc_fbhigh->fidr = 0; 127 fbi->dmadesc_fbhigh->ldcmd = BYTES_PER_PANEL / 4; /* length in word */ 128 129 fbi->dmadesc_palette->fsadr = virt_to_phys((void *)fbi->palette); 130 fbi->dmadesc_palette->fidr = 0; 131 fbi->dmadesc_palette->ldcmd = (fbi->palette_size * 2)/4 | (1<<28); 132 133 if(NBITS(vid->vl_bpix) < 12) 134 { 135 /* assume any mode with <12 bpp is palette driven */ 136 fbi->dmadesc_palette->fdadr = virt_to_phys(fbi->dmadesc_fbhigh); 137 fbi->dmadesc_fbhigh->fdadr = virt_to_phys(fbi->dmadesc_palette); 138 /* flips back and forth between pal and fbhigh */ 139 fbi->fdadr0 = virt_to_phys(fbi->dmadesc_palette); 140 } else { 141 /* palette shouldn't be loaded in true-color mode */ 142 fbi->dmadesc_fbhigh->fdadr = virt_to_phys((void *)fbi->dmadesc_fbhigh); 143 fbi->fdadr0 = virt_to_phys(fbi->dmadesc_fbhigh); /* no pal just fbhigh */ 144 } 145 146 flush_cache_all(); 147 } 148 149 static int jz_lcd_hw_init(vidinfo_t *vid) 150 { 151 struct jz_fb_info *fbi = &vid->jz_fb; 152 unsigned int val = 0; 153 unsigned int pclk; 154 unsigned int stnH; 155 int pll_div; 156 157 /* Setting Control register */ 158 switch (jzfb.bpp) { 159 case 1: 160 val |= LCD_CTRL_BPP_1; 161 break; 162 case 2: 163 val |= LCD_CTRL_BPP_2; 164 break; 165 case 4: 166 val |= LCD_CTRL_BPP_4; 167 break; 168 case 8: 169 val |= LCD_CTRL_BPP_8; 170 break; 171 case 15: 172 val |= LCD_CTRL_RGB555; 173 case 16: 174 val |= LCD_CTRL_BPP_16; 175 break; 176 case 17 ... 32: 177 val |= LCD_CTRL_BPP_18_24; /* target is 4bytes/pixel */ 178 break; 179 180 default: 181 /* printf("jz_lcd.c The BPP %d is not supported\n", jzfb.bpp); */ 182 val |= LCD_CTRL_BPP_16; 183 break; 184 } 185 186 switch (jzfb.cfg & MODE_MASK) { 187 case MODE_STN_MONO_DUAL: 188 case MODE_STN_COLOR_DUAL: 189 case MODE_STN_MONO_SINGLE: 190 case MODE_STN_COLOR_SINGLE: 191 switch (jzfb.bpp) { 192 case 1: 193 /* val |= LCD_CTRL_PEDN; */ 194 case 2: 195 val |= LCD_CTRL_FRC_2; 196 break; 197 case 4: 198 val |= LCD_CTRL_FRC_4; 199 break; 200 case 8: 201 default: 202 val |= LCD_CTRL_FRC_16; 203 break; 204 } 205 break; 206 } 207 208 val |= LCD_CTRL_BST_16; /* Burst Length is 16WORD=64Byte */ 209 val |= LCD_CTRL_OFUP; /* OutFIFO underrun protect */ 210 211 switch (jzfb.cfg & MODE_MASK) { 212 case MODE_STN_MONO_DUAL: 213 case MODE_STN_COLOR_DUAL: 214 case MODE_STN_MONO_SINGLE: 215 case MODE_STN_COLOR_SINGLE: 216 switch (jzfb.cfg & STN_DAT_PINMASK) { 217 case STN_DAT_PIN1: 218 /* Do not adjust the hori-param value. */ 219 break; 220 case STN_DAT_PIN2: 221 align2(jzfb.hsw); 222 align2(jzfb.elw); 223 align2(jzfb.blw); 224 break; 225 case STN_DAT_PIN4: 226 align4(jzfb.hsw); 227 align4(jzfb.elw); 228 align4(jzfb.blw); 229 break; 230 case STN_DAT_PIN8: 231 align8(jzfb.hsw); 232 align8(jzfb.elw); 233 align8(jzfb.blw); 234 break; 235 } 236 break; 237 } 238 239 REG_LCD_CTRL = val; 240 241 switch (jzfb.cfg & MODE_MASK) { 242 case MODE_STN_MONO_DUAL: 243 case MODE_STN_COLOR_DUAL: 244 case MODE_STN_MONO_SINGLE: 245 case MODE_STN_COLOR_SINGLE: 246 if (((jzfb.cfg & MODE_MASK) == MODE_STN_MONO_DUAL) || 247 ((jzfb.cfg & MODE_MASK) == MODE_STN_COLOR_DUAL)) 248 stnH = jzfb.h >> 1; 249 else 250 stnH = jzfb.h; 251 252 REG_LCD_VSYNC = (0 << 16) | jzfb.vsw; 253 REG_LCD_HSYNC = ((jzfb.blw+jzfb.w) << 16) | (jzfb.blw+jzfb.w+jzfb.hsw); 254 255 /* Screen setting */ 256 REG_LCD_VAT = ((jzfb.blw + jzfb.w + jzfb.hsw + jzfb.elw) << 16) | (stnH + jzfb.vsw + jzfb.bfw + jzfb.efw); 257 REG_LCD_DAH = (jzfb.blw << 16) | (jzfb.blw + jzfb.w); 258 REG_LCD_DAV = (0 << 16) | (stnH); 259 260 /* AC BIAs signal */ 261 REG_LCD_PS = (0 << 16) | (stnH+jzfb.vsw+jzfb.efw+jzfb.bfw); 262 263 break; 264 265 case MODE_TFT_GEN: 266 case MODE_TFT_SHARP: 267 case MODE_TFT_CASIO: 268 case MODE_TFT_SAMSUNG: 269 case MODE_8BIT_SERIAL_TFT: 270 case MODE_TFT_18BIT: 271 REG_LCD_VSYNC = (0 << 16) | jzfb.vsw; 272 REG_LCD_HSYNC = (0 << 16) | jzfb.hsw; 273 REG_LCD_DAV =((jzfb.vsw+jzfb.bfw) << 16) | (jzfb.vsw +jzfb.bfw+jzfb.h); 274 REG_LCD_DAH = ((jzfb.hsw + jzfb.blw) << 16) | (jzfb.hsw + jzfb.blw + jzfb.w ); 275 REG_LCD_VAT = (((jzfb.blw + jzfb.w + jzfb.elw + jzfb.hsw)) << 16) \ 276 | (jzfb.vsw + jzfb.bfw + jzfb.h + jzfb.efw); 277 break; 278 } 279 280 switch (jzfb.cfg & MODE_MASK) { 281 case MODE_TFT_SAMSUNG: 282 { 283 unsigned int total, tp_s, tp_e, ckv_s, ckv_e; 284 unsigned int rev_s, rev_e, inv_s, inv_e; 285 286 pclk = val * (jzfb.w + jzfb.hsw + jzfb.elw + jzfb.blw) * 287 (jzfb.h + jzfb.vsw + jzfb.efw + jzfb.bfw); /* Pixclk */ 288 289 total = jzfb.blw + jzfb.w + jzfb.elw + jzfb.hsw; 290 tp_s = jzfb.blw + jzfb.w + 1; 291 tp_e = tp_s + 1; 292 /* ckv_s = tp_s - jz_clocks.pixclk/(1000000000/4100); */ 293 ckv_s = tp_s - pclk/(1000000000/4100); 294 ckv_e = tp_s + total; 295 rev_s = tp_s - 11; /* -11.5 clk */ 296 rev_e = rev_s + total; 297 inv_s = tp_s; 298 inv_e = inv_s + total; 299 REG_LCD_CLS = (tp_s << 16) | tp_e; 300 REG_LCD_PS = (ckv_s << 16) | ckv_e; 301 REG_LCD_SPL = (rev_s << 16) | rev_e; 302 REG_LCD_REV = (inv_s << 16) | inv_e; 303 jzfb.cfg |= STFT_REVHI | STFT_SPLHI; 304 break; 305 } 306 case MODE_TFT_SHARP: 307 { 308 unsigned int total, cls_s, cls_e, ps_s, ps_e; 309 unsigned int spl_s, spl_e, rev_s, rev_e; 310 total = jzfb.blw + jzfb.w + jzfb.elw + jzfb.hsw; 311 spl_s = 1; 312 spl_e = spl_s + 1; 313 cls_s = 0; 314 cls_e = total - 60; /* > 4us (pclk = 80ns) */ 315 ps_s = cls_s; 316 ps_e = cls_e; 317 rev_s = total - 40; /* > 3us (pclk = 80ns) */ 318 rev_e = rev_s + total; 319 jzfb.cfg |= STFT_PSHI; 320 REG_LCD_SPL = (spl_s << 16) | spl_e; 321 REG_LCD_CLS = (cls_s << 16) | cls_e; 322 REG_LCD_PS = (ps_s << 16) | ps_e; 323 REG_LCD_REV = (rev_s << 16) | rev_e; 324 break; 325 } 326 case MODE_TFT_CASIO: 327 break; 328 } 329 330 /* Configure the LCD panel */ 331 REG_LCD_CFG = jzfb.cfg; 332 333 /* Timing setting */ 334 __cpm_stop_lcd(); 335 336 val = jzfb.fclk; /* frame clk */ 337 if ( (jzfb.cfg & MODE_MASK) != MODE_8BIT_SERIAL_TFT) { 338 pclk = val * (jzfb.w + jzfb.hsw + jzfb.elw + jzfb.blw) * 339 (jzfb.h + jzfb.vsw + jzfb.efw + jzfb.bfw); /* Pixclk */ 340 } else { 341 /* serial mode: Hsync period = 3*Width_Pixel */ 342 pclk = val * (jzfb.w*3 + jzfb.hsw + jzfb.elw + jzfb.blw) * 343 (jzfb.h + jzfb.vsw + jzfb.efw + jzfb.bfw); /* Pixclk */ 344 } 345 346 if (((jzfb.cfg & MODE_MASK) == MODE_STN_COLOR_SINGLE) || 347 ((jzfb.cfg & MODE_MASK) == MODE_STN_COLOR_DUAL)) 348 pclk = (pclk * 3); 349 350 if (((jzfb.cfg & MODE_MASK) == MODE_STN_COLOR_SINGLE) || 351 ((jzfb.cfg & MODE_MASK) == MODE_STN_COLOR_DUAL) || 352 ((jzfb.cfg & MODE_MASK) == MODE_STN_MONO_SINGLE) || 353 ((jzfb.cfg & MODE_MASK) == MODE_STN_MONO_DUAL)) 354 pclk = pclk >> ((jzfb.cfg & STN_DAT_PINMASK) >> 4); 355 356 if (((jzfb.cfg & MODE_MASK) == MODE_STN_COLOR_DUAL) || 357 ((jzfb.cfg & MODE_MASK) == MODE_STN_MONO_DUAL)) 358 pclk >>= 1; 359 360 pll_div = ( REG_CPM_CPCCR & CPM_CPCCR_PCS ); /* clock source,0:pllout/2 1: pllout */ 361 pll_div = pll_div ? 1 : 2 ; 362 val = ( __cpm_get_pllout()/pll_div ) / pclk; 363 val--; 364 if ( val > 0x1ff ) { 365 /* printf("CPM_LPCDR too large, set it to 0x1ff\n"); */ 366 val = 0x1ff; 367 } 368 __cpm_set_pixdiv(val); 369 370 val = pclk * 3 ; /* LCDClock > 2.5*Pixclock */ 371 if ( val > 150000000 ) { 372 /* printf("Warning: LCDClock=%d\n, LCDClock must less or equal to 150MHz.\n", val); */ 373 /* printf("Change LCDClock to 150MHz\n"); */ 374 val = 150000000; 375 } 376 val = ( __cpm_get_pllout()/pll_div ) / val; 377 val--; 378 if ( val > 0x1f ) { 379 /* printf("CPM_CPCCR.LDIV too large, set it to 0x1f\n"); */ 380 val = 0x1f; 381 } 382 __cpm_set_ldiv( val ); 383 REG_CPM_CPCCR |= CPM_CPCCR_CE ; /* update divide */ 384 385 __cpm_start_lcd(); 386 udelay(1000); 387 388 REG_LCD_DA0 = fbi->fdadr0; /* frame descripter*/ 389 390 if (((jzfb.cfg & MODE_MASK) == MODE_STN_COLOR_DUAL) || 391 ((jzfb.cfg & MODE_MASK) == MODE_STN_MONO_DUAL)) 392 REG_LCD_DA1 = fbi->fdadr1; /* frame descripter*/ 393 394 return 0; 395 } 396 397 void lcd_setcolreg (unsigned short regno, unsigned short red, unsigned short green, unsigned short blue) 398 { 399 } 400 401 void lcd_initcolregs (void) 402 { 403 }