1fb8ddc24SMarek Vasut /* 2fb8ddc24SMarek Vasut * Freescale i.MX23/i.MX28 LCDIF driver 3fb8ddc24SMarek Vasut * 4fb8ddc24SMarek Vasut * Copyright (C) 2011-2013 Marek Vasut <marex@denx.de> 5fb8ddc24SMarek Vasut * 6fb8ddc24SMarek Vasut * This program is free software; you can redistribute it and/or 7fb8ddc24SMarek Vasut * modify it under the terms of the GNU General Public License as 8fb8ddc24SMarek Vasut * published by the Free Software Foundation; either version 2 of 9fb8ddc24SMarek Vasut * the License, or (at your option) any later version. 10fb8ddc24SMarek Vasut * 11fb8ddc24SMarek Vasut * This program is distributed in the hope that it will be useful, 12fb8ddc24SMarek Vasut * but WITHOUT ANY WARRANTY; without even the implied warranty of 13fb8ddc24SMarek Vasut * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14fb8ddc24SMarek Vasut * GNU General Public License for more details. 15fb8ddc24SMarek Vasut * 16fb8ddc24SMarek Vasut * You should have received a copy of the GNU General Public License 17fb8ddc24SMarek Vasut * along with this program; if not, write to the Free Software 18fb8ddc24SMarek Vasut * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 19fb8ddc24SMarek Vasut * MA 02111-1307 USA 20fb8ddc24SMarek Vasut */ 21fb8ddc24SMarek Vasut #include <common.h> 22fb8ddc24SMarek Vasut #include <malloc.h> 23fb8ddc24SMarek Vasut #include <video_fb.h> 24fb8ddc24SMarek Vasut 25fb8ddc24SMarek Vasut #include <asm/arch/imx-regs.h> 26fb8ddc24SMarek Vasut #include <asm/arch/clock.h> 27fb8ddc24SMarek Vasut #include <asm/arch/sys_proto.h> 28fb8ddc24SMarek Vasut #include <asm/errno.h> 29fb8ddc24SMarek Vasut #include <asm/io.h> 30fb8ddc24SMarek Vasut 31fb8ddc24SMarek Vasut #include "videomodes.h" 32fb8ddc24SMarek Vasut 33fb8ddc24SMarek Vasut #define PS2KHZ(ps) (1000000000UL / (ps)) 34fb8ddc24SMarek Vasut 35fb8ddc24SMarek Vasut static GraphicDevice panel; 36fb8ddc24SMarek Vasut 37fb8ddc24SMarek Vasut /* 38fb8ddc24SMarek Vasut * DENX M28EVK: 39fb8ddc24SMarek Vasut * setenv videomode 40fb8ddc24SMarek Vasut * video=ctfb:x:800,y:480,depth:18,mode:0,pclk:30066, 41fb8ddc24SMarek Vasut * le:0,ri:256,up:0,lo:45,hs:1,vs:1,sync:100663296,vmode:0 42*11f98d1fSFabio Estevam * 43*11f98d1fSFabio Estevam * Freescale mx23evk/mx28evk with a Seiko 4.3'' WVGA panel: 44*11f98d1fSFabio Estevam * setenv videomode 45*11f98d1fSFabio Estevam * video=ctfb:x:800,y:480,depth:24,mode:0,pclk:29851, 46*11f98d1fSFabio Estevam * le:89,ri:164,up:23,lo:10,hs:10,vs:10,sync:0,vmode:0 47fb8ddc24SMarek Vasut */ 48fb8ddc24SMarek Vasut 49fb8ddc24SMarek Vasut static void mxs_lcd_init(GraphicDevice *panel, 50fb8ddc24SMarek Vasut struct ctfb_res_modes *mode, int bpp) 51fb8ddc24SMarek Vasut { 52fb8ddc24SMarek Vasut struct mxs_lcdif_regs *regs = (struct mxs_lcdif_regs *)MXS_LCDIF_BASE; 53fb8ddc24SMarek Vasut uint32_t word_len = 0, bus_width = 0; 54fb8ddc24SMarek Vasut uint8_t valid_data = 0; 55fb8ddc24SMarek Vasut 56fb8ddc24SMarek Vasut /* Kick in the LCDIF clock */ 57fb8ddc24SMarek Vasut mxs_set_lcdclk(PS2KHZ(mode->pixclock)); 58fb8ddc24SMarek Vasut 59fb8ddc24SMarek Vasut /* Restart the LCDIF block */ 60fb8ddc24SMarek Vasut mxs_reset_block(®s->hw_lcdif_ctrl_reg); 61fb8ddc24SMarek Vasut 62fb8ddc24SMarek Vasut switch (bpp) { 63fb8ddc24SMarek Vasut case 24: 64fb8ddc24SMarek Vasut word_len = LCDIF_CTRL_WORD_LENGTH_24BIT; 65fb8ddc24SMarek Vasut bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_24BIT; 66fb8ddc24SMarek Vasut valid_data = 0x7; 67fb8ddc24SMarek Vasut break; 68fb8ddc24SMarek Vasut case 18: 69fb8ddc24SMarek Vasut word_len = LCDIF_CTRL_WORD_LENGTH_24BIT; 70fb8ddc24SMarek Vasut bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_18BIT; 71fb8ddc24SMarek Vasut valid_data = 0x7; 72fb8ddc24SMarek Vasut break; 73fb8ddc24SMarek Vasut case 16: 74fb8ddc24SMarek Vasut word_len = LCDIF_CTRL_WORD_LENGTH_16BIT; 75fb8ddc24SMarek Vasut bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_16BIT; 76fb8ddc24SMarek Vasut valid_data = 0xf; 77fb8ddc24SMarek Vasut break; 78fb8ddc24SMarek Vasut case 8: 79fb8ddc24SMarek Vasut word_len = LCDIF_CTRL_WORD_LENGTH_8BIT; 80fb8ddc24SMarek Vasut bus_width = LCDIF_CTRL_LCD_DATABUS_WIDTH_8BIT; 81fb8ddc24SMarek Vasut valid_data = 0xf; 82fb8ddc24SMarek Vasut break; 83fb8ddc24SMarek Vasut } 84fb8ddc24SMarek Vasut 85fb8ddc24SMarek Vasut writel(bus_width | word_len | LCDIF_CTRL_DOTCLK_MODE | 86fb8ddc24SMarek Vasut LCDIF_CTRL_BYPASS_COUNT | LCDIF_CTRL_LCDIF_MASTER, 87fb8ddc24SMarek Vasut ®s->hw_lcdif_ctrl); 88fb8ddc24SMarek Vasut 89fb8ddc24SMarek Vasut writel(valid_data << LCDIF_CTRL1_BYTE_PACKING_FORMAT_OFFSET, 90fb8ddc24SMarek Vasut ®s->hw_lcdif_ctrl1); 91fb8ddc24SMarek Vasut writel((mode->yres << LCDIF_TRANSFER_COUNT_V_COUNT_OFFSET) | mode->xres, 92fb8ddc24SMarek Vasut ®s->hw_lcdif_transfer_count); 93fb8ddc24SMarek Vasut 94fb8ddc24SMarek Vasut writel(LCDIF_VDCTRL0_ENABLE_PRESENT | LCDIF_VDCTRL0_ENABLE_POL | 95fb8ddc24SMarek Vasut LCDIF_VDCTRL0_VSYNC_PERIOD_UNIT | 96fb8ddc24SMarek Vasut LCDIF_VDCTRL0_VSYNC_PULSE_WIDTH_UNIT | 97fb8ddc24SMarek Vasut mode->vsync_len, ®s->hw_lcdif_vdctrl0); 98fb8ddc24SMarek Vasut writel(mode->upper_margin + mode->lower_margin + 99fb8ddc24SMarek Vasut mode->vsync_len + mode->yres, 100fb8ddc24SMarek Vasut ®s->hw_lcdif_vdctrl1); 101fb8ddc24SMarek Vasut writel((mode->hsync_len << LCDIF_VDCTRL2_HSYNC_PULSE_WIDTH_OFFSET) | 102fb8ddc24SMarek Vasut (mode->left_margin + mode->right_margin + 103fb8ddc24SMarek Vasut mode->hsync_len + mode->xres), 104fb8ddc24SMarek Vasut ®s->hw_lcdif_vdctrl2); 105fb8ddc24SMarek Vasut writel(((mode->left_margin + mode->hsync_len) << 106fb8ddc24SMarek Vasut LCDIF_VDCTRL3_HORIZONTAL_WAIT_CNT_OFFSET) | 107fb8ddc24SMarek Vasut (mode->upper_margin + mode->vsync_len), 108fb8ddc24SMarek Vasut ®s->hw_lcdif_vdctrl3); 109fb8ddc24SMarek Vasut writel((0 << LCDIF_VDCTRL4_DOTCLK_DLY_SEL_OFFSET) | mode->xres, 110fb8ddc24SMarek Vasut ®s->hw_lcdif_vdctrl4); 111fb8ddc24SMarek Vasut 112fb8ddc24SMarek Vasut writel(panel->frameAdrs, ®s->hw_lcdif_cur_buf); 113fb8ddc24SMarek Vasut writel(panel->frameAdrs, ®s->hw_lcdif_next_buf); 114fb8ddc24SMarek Vasut 115fb8ddc24SMarek Vasut /* Flush FIFO first */ 116fb8ddc24SMarek Vasut writel(LCDIF_CTRL1_FIFO_CLEAR, ®s->hw_lcdif_ctrl1_set); 117fb8ddc24SMarek Vasut 118fb8ddc24SMarek Vasut /* Sync signals ON */ 119fb8ddc24SMarek Vasut setbits_le32(®s->hw_lcdif_vdctrl4, LCDIF_VDCTRL4_SYNC_SIGNALS_ON); 120fb8ddc24SMarek Vasut 121fb8ddc24SMarek Vasut /* FIFO cleared */ 122fb8ddc24SMarek Vasut writel(LCDIF_CTRL1_FIFO_CLEAR, ®s->hw_lcdif_ctrl1_clr); 123fb8ddc24SMarek Vasut 124fb8ddc24SMarek Vasut /* RUN! */ 125fb8ddc24SMarek Vasut writel(LCDIF_CTRL_RUN, ®s->hw_lcdif_ctrl_set); 126fb8ddc24SMarek Vasut } 127fb8ddc24SMarek Vasut 128fb8ddc24SMarek Vasut void *video_hw_init(void) 129fb8ddc24SMarek Vasut { 130fb8ddc24SMarek Vasut int bpp = -1; 131fb8ddc24SMarek Vasut char *penv; 132fb8ddc24SMarek Vasut void *fb; 133fb8ddc24SMarek Vasut struct ctfb_res_modes mode; 134fb8ddc24SMarek Vasut 135fb8ddc24SMarek Vasut puts("Video: "); 136fb8ddc24SMarek Vasut 137fb8ddc24SMarek Vasut /* Suck display configuration from "videomode" variable */ 138fb8ddc24SMarek Vasut penv = getenv("videomode"); 139fb8ddc24SMarek Vasut if (!penv) { 140fb8ddc24SMarek Vasut printf("MXSFB: 'videomode' variable not set!"); 141fb8ddc24SMarek Vasut return NULL; 142fb8ddc24SMarek Vasut } 143fb8ddc24SMarek Vasut 144fb8ddc24SMarek Vasut bpp = video_get_params(&mode, penv); 145fb8ddc24SMarek Vasut 146fb8ddc24SMarek Vasut /* fill in Graphic device struct */ 147fb8ddc24SMarek Vasut sprintf(panel.modeIdent, "%dx%dx%d", 148fb8ddc24SMarek Vasut mode.xres, mode.yres, bpp); 149fb8ddc24SMarek Vasut 150fb8ddc24SMarek Vasut panel.winSizeX = mode.xres; 151fb8ddc24SMarek Vasut panel.winSizeY = mode.yres; 152fb8ddc24SMarek Vasut panel.plnSizeX = mode.xres; 153fb8ddc24SMarek Vasut panel.plnSizeY = mode.yres; 154fb8ddc24SMarek Vasut 155fb8ddc24SMarek Vasut switch (bpp) { 156fb8ddc24SMarek Vasut case 24: 157fb8ddc24SMarek Vasut case 18: 158fb8ddc24SMarek Vasut panel.gdfBytesPP = 4; 159fb8ddc24SMarek Vasut panel.gdfIndex = GDF_32BIT_X888RGB; 160fb8ddc24SMarek Vasut break; 161fb8ddc24SMarek Vasut case 16: 162fb8ddc24SMarek Vasut panel.gdfBytesPP = 2; 163fb8ddc24SMarek Vasut panel.gdfIndex = GDF_16BIT_565RGB; 164fb8ddc24SMarek Vasut break; 165fb8ddc24SMarek Vasut case 8: 166fb8ddc24SMarek Vasut panel.gdfBytesPP = 1; 167fb8ddc24SMarek Vasut panel.gdfIndex = GDF__8BIT_INDEX; 168fb8ddc24SMarek Vasut break; 169fb8ddc24SMarek Vasut default: 170fb8ddc24SMarek Vasut printf("MXSFB: Invalid BPP specified! (bpp = %i)\n", bpp); 171fb8ddc24SMarek Vasut return NULL; 172fb8ddc24SMarek Vasut } 173fb8ddc24SMarek Vasut 174fb8ddc24SMarek Vasut panel.memSize = mode.xres * mode.yres * panel.gdfBytesPP; 175fb8ddc24SMarek Vasut 176fb8ddc24SMarek Vasut /* Allocate framebuffer */ 177fb8ddc24SMarek Vasut fb = malloc(panel.memSize); 178fb8ddc24SMarek Vasut if (!fb) { 179fb8ddc24SMarek Vasut printf("MXSFB: Error allocating framebuffer!\n"); 180fb8ddc24SMarek Vasut return NULL; 181fb8ddc24SMarek Vasut } 182fb8ddc24SMarek Vasut 183fb8ddc24SMarek Vasut /* Wipe framebuffer */ 184fb8ddc24SMarek Vasut memset(fb, 0, panel.memSize); 185fb8ddc24SMarek Vasut 186fb8ddc24SMarek Vasut panel.frameAdrs = (u32)fb; 187fb8ddc24SMarek Vasut 188fb8ddc24SMarek Vasut printf("%s\n", panel.modeIdent); 189fb8ddc24SMarek Vasut 190fb8ddc24SMarek Vasut /* Start framebuffer */ 191fb8ddc24SMarek Vasut mxs_lcd_init(&panel, &mode, bpp); 192fb8ddc24SMarek Vasut 193fb8ddc24SMarek Vasut return (void *)&panel; 194fb8ddc24SMarek Vasut } 195