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