diff options
Diffstat (limited to 'src/mainboard/siemens/mc_apl1/ptn3460.c')
| -rw-r--r-- | src/mainboard/siemens/mc_apl1/ptn3460.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/src/mainboard/siemens/mc_apl1/ptn3460.c b/src/mainboard/siemens/mc_apl1/ptn3460.c new file mode 100644 index 0000000000..d63c71cce8 --- /dev/null +++ b/src/mainboard/siemens/mc_apl1/ptn3460.c @@ -0,0 +1,178 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014-2017 Siemens AG + * + * 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; version 2 of the License. + * + * 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. + */ + +#include <console/console.h> +#include <lib.h> +#include <hwilib.h> +#include <device/i2c.h> +#include <soc/i2c.h> +#include "ptn3460.h" + +/** + * This function sets up the DP2LVDS-converter to be used with the appropriate + * lcd panel. + * + * @param *hwi_block Filename in CBFS of the block to use as HW-Info. + * @return 0 on success or HWI-Data/PTN error code. + */ +int ptn3460_init(const char *hwi_block) +{ + struct ptn_3460_config cfg; + int status; + uint8_t disp_con = 0, color_depth = 0; + uint8_t edid_data[PTN_EDID_LEN]; + int i; + + if (!hwi_block || hwilib_find_blocks(hwi_block) != CB_SUCCESS) { + printk(BIOS_ERR, "LCD: Info block \"%s\" not found!\n", + hwi_block); + return 1; + } + /* Get all needed information from hwinfo block. */ + if (hwilib_get_field(Edid, edid_data, sizeof(edid_data)) != + sizeof(edid_data)) { + printk(BIOS_ERR, "LCD: No EDID data available in %s\n", + hwi_block); + return 1; + } + if ((hwilib_get_field(PF_DisplCon, &disp_con, sizeof(disp_con)) != + sizeof(disp_con))) { + printk(BIOS_ERR, "LCD: Missing panel features from %s\n", + hwi_block); + return 1; + } + if (hwilib_get_field(PF_Color_Depth, &color_depth, sizeof(color_depth)) + != sizeof(color_depth)) { + printk(BIOS_ERR, "LCD: Missing panel features from %s\n", + hwi_block); + return 1; + } + /* + * Here, all the desired information for setting up DP2LVDS converter + * is present. Inside the converter, table 6 will be used for the + * timings. + */ + status = ptn3460_write_edid(6, edid_data); + if (status) + return status; + /* Select this table to be emulated. */ + ptn_select_edid(6); + /* Read PTN configuration data. */ + status = i2c_read_bytes(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_CONFIG_OFF, (uint8_t *)&cfg, + sizeof(cfg)); + if (status) + return (PTN_BUS_ERROR | status); + /* Set up configuration data according to the hwinfo block we get. */ + cfg.dp_interface_ctrl = 0; + cfg.lvds_interface_ctrl1 = 0x00; + if (disp_con == PF_DISPLCON_LVDS_DUAL) + /* Turn on dual LVDS lane and clock. */ + cfg.lvds_interface_ctrl1 |= 0x0b; + if (color_depth == PF_COLOR_DEPTH_6BIT) + /* Use 18 bits per pixel. */ + cfg.lvds_interface_ctrl1 |= 0x20; + + /* No clock spreading, 300 mV LVDS swing. */ + cfg.lvds_interface_ctrl2 = 0x03; + /* No LVDS signal swap. */ + cfg.lvds_interface_ctrl3 = 0x00; + /* Delay T2 (VDD to LVDS active) by 16 ms. */ + cfg.t2_delay = 1; + /* 250 ms from LVDS to backlight active. */ + cfg.t3_timing = 10; + /* 1 second re-power delay. */ + cfg.t12_timing = 20; + /* 150 ms backlight off to LVDS inactive. */ + cfg.t4_timing = 3; + /* Delay T5 (LVDS to VDD inactive) by 16 ms. */ + cfg.t5_delay = 1; + /* Enable backlight control. */ + cfg.backlight_ctrl = 0; + + /* Write back configuration data to PTN3460. */ + for (i = 0; i < sizeof(struct ptn_3460_config); i++) { + status = i2c_writeb(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_CONFIG_OFF+i, + *(((uint8_t *)&cfg)+i)); + if (status) + return (PTN_BUS_ERROR | status); + } + + /* Read PTN configuration data. */ + status = i2c_read_bytes(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_CONFIG_OFF, (uint8_t *)&cfg, sizeof(cfg)); + if (status) + return (PTN_BUS_ERROR | status); + + return PTN_NO_ERROR; +} + +/** + * This function writes one Extended Display Identification Data (EDID) + * structure to PTN3460. + * + * @param edid_num Number of EDID that must be written (0..6). + * @param *data Pointer to a buffer where data to write is stored in. + * @return 0 on success or error code. + */ +int ptn3460_write_edid(uint8_t edid_num, const uint8_t data[PTN_EDID_LEN]) +{ + int status; + int i; + + if (edid_num > PTN_MAX_EDID_NUM) + return PTN_INVALID_EDID; + + /* First enable access to the desired EDID table. */ + status = i2c_writeb(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_CONFIG_OFF + 5, edid_num); + if (status) + return (PTN_BUS_ERROR | status); + + /* Now we can simply write EDID-data to ptn3460. */ + for (i = 0; i < PTN_EDID_LEN; i++) { + status = i2c_writeb(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_EDID_OFF + i, data[i]); + if (status) + return (PTN_BUS_ERROR | status); + } + + return PTN_NO_ERROR; +} + +/** + * This function selects one of 7 EDID-tables inside PTN3460 which should be + * emulated on DisplayPort and turn emulation ON. + * + * @param edid_num Number of EDID to emulate (0..6). + * @return 0 on success or error code. + */ +int ptn_select_edid(uint8_t edid_num) +{ + int status; + uint8_t val; + + if (edid_num > PTN_MAX_EDID_NUM) + return PTN_INVALID_EDID; + /* Enable emulation of the desired EDID table. */ + val = (edid_num << 1) | 1; + status = i2c_writeb(PTN_I2C_CONTROLLER, PTN_SLAVE_ADR, + PTN_CONFIG_OFF + 4, val); + if (status) + return (PTN_BUS_ERROR | status); + else + return PTN_NO_ERROR; +} |