| /* |
| * Copyright 2007-2011 Freescale Semiconductor, Inc. |
| * Authors: York Sun <yorksun@freescale.com> |
| * Timur Tabi <timur@freescale.com> |
| * |
| * FSL DIU Framebuffer driver |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <common.h> |
| #include <command.h> |
| #include <asm/io.h> |
| #include <fsl_diu_fb.h> |
| #include "../common/pixis.h" |
| |
| #define PX_BRDCFG0_DLINK 0x10 |
| #define PX_BRDCFG0_DVISEL 0x08 |
| |
| void diu_set_pixel_clock(unsigned int pixclock) |
| { |
| volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR; |
| volatile ccsr_gur_t *gur = &immap->im_gur; |
| volatile unsigned int *guts_clkdvdr = &gur->clkdvdr; |
| unsigned long speed_ccb, temp, pixval; |
| |
| speed_ccb = get_bus_freq(0); |
| temp = 1000000000/pixclock; |
| temp *= 1000; |
| pixval = speed_ccb / temp; |
| debug("DIU pixval = %lu\n", pixval); |
| |
| /* Modify PXCLK in GUTS CLKDVDR */ |
| debug("DIU: Current value of CLKDVDR = 0x%08x\n", *guts_clkdvdr); |
| temp = *guts_clkdvdr & 0x2000FFFF; |
| *guts_clkdvdr = temp; /* turn off clock */ |
| *guts_clkdvdr = temp | 0x80000000 | ((pixval & 0x1F) << 16); |
| debug("DIU: Modified value of CLKDVDR = 0x%08x\n", *guts_clkdvdr); |
| } |
| |
| int platform_diu_init(unsigned int xres, unsigned int yres, const char *port) |
| { |
| const char *name; |
| int gamma_fix = 0; |
| u32 pixel_format = 0x88883316; |
| u8 temp; |
| |
| temp = in_8(&pixis->brdcfg0); |
| |
| if (strncmp(port, "dlvds", 5) == 0) { |
| /* Dual link LVDS */ |
| gamma_fix = 1; |
| temp &= ~(PX_BRDCFG0_DLINK | PX_BRDCFG0_DVISEL); |
| name = "Dual-Link LVDS"; |
| } else if (strncmp(port, "lvds", 4) == 0) { |
| /* Single link LVDS */ |
| temp = (temp & ~PX_BRDCFG0_DVISEL) | PX_BRDCFG0_DLINK; |
| name = "Single-Link LVDS"; |
| } else { |
| /* DVI */ |
| if (in_8(&pixis->ver) == 1) /* Board version */ |
| pixel_format = 0x88882317; |
| temp |= PX_BRDCFG0_DVISEL; |
| name = "DVI"; |
| } |
| |
| printf("DIU: Switching to %s monitor @ %ux%u\n", name, xres, yres); |
| out_8(&pixis->brdcfg0, temp); |
| |
| return fsl_diu_init(xres, pixel_format, gamma_fix); |
| } |