diff options
author | Dirk Eibach <dirk.eibach@gdsys.cc> | 2015-10-28 11:46:32 +0100 |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2015-11-12 18:03:48 -0500 |
commit | a3f9d6c7791bbf0ff7fc68d49abcc5b53c6f7e48 (patch) | |
tree | 070fd5f449eaf864d492a0ffa6c2dbd66582a9ed /board/gdsys/common/ch7301.c | |
parent | 51b96fc67c76cddf3937b18380eb45dcfadd7b56 (diff) |
mpc83xx: Add strider board
The gdsys strider board is based on a Freescale MPC8308 SOC.
It boots from NOR-Flash, kernel and rootfs are stored on
SD-Card.
On board peripherals include:
- 1x 10/100 Mbit/s Ethernet (optional)
- Lattice ECP3 FPGA connected via eLBC
Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
[trini: Drop setting CONFIG_SYS_GENERIC_BOARD, this is always true now]
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'board/gdsys/common/ch7301.c')
-rw-r--r-- | board/gdsys/common/ch7301.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/board/gdsys/common/ch7301.c b/board/gdsys/common/ch7301.c new file mode 100644 index 0000000000..c054e55cf7 --- /dev/null +++ b/board/gdsys/common/ch7301.c @@ -0,0 +1,64 @@ +/* + * (C) Copyright 2014 + * Dirk Eibach, Guntermann & Drunck GmbH, dirk.eibach@gdsys.cc + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* Chrontel CH7301C DVI Transmitter */ + +#include <common.h> +#include <asm/io.h> +#include <errno.h> +#include <i2c.h> + +#define CH7301_I2C_ADDR 0x75 + +enum { + CH7301_CM = 0x1c, /* Clock Mode Register */ + CH7301_IC = 0x1d, /* Input Clock Register */ + CH7301_GPIO = 0x1e, /* GPIO Control Register */ + CH7301_IDF = 0x1f, /* Input Data Format Register */ + CH7301_CD = 0x20, /* Connection Detect Register */ + CH7301_DC = 0x21, /* DAC Control Register */ + CH7301_HPD = 0x23, /* Hot Plug Detection Register */ + CH7301_TCTL = 0x31, /* DVI Control Input Register */ + CH7301_TPCP = 0x33, /* DVI PLL Charge Pump Ctrl Register */ + CH7301_TPD = 0x34, /* DVI PLL Divide Register */ + CH7301_TPVT = 0x35, /* DVI PLL Supply Control Register */ + CH7301_TPF = 0x36, /* DVI PLL Filter Register */ + CH7301_TCT = 0x37, /* DVI Clock Test Register */ + CH7301_TSTP = 0x48, /* Test Pattern Register */ + CH7301_PM = 0x49, /* Power Management register */ + CH7301_VID = 0x4a, /* Version ID Register */ + CH7301_DID = 0x4b, /* Device ID Register */ + CH7301_DSP = 0x56, /* DVI Sync polarity Register */ +}; + +int ch7301_i2c[] = CONFIG_SYS_CH7301_I2C; + +int ch7301_probe(unsigned screen, bool power) +{ + u8 value; + + i2c_set_bus_num(ch7301_i2c[screen]); + if (i2c_probe(CH7301_I2C_ADDR)) + return -1; + + value = i2c_reg_read(CH7301_I2C_ADDR, CH7301_DID); + if (value != 0x17) + return -1; + + if (power) { + i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPCP, 0x08); + i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPD, 0x16); + i2c_reg_write(CH7301_I2C_ADDR, CH7301_TPF, 0x60); + i2c_reg_write(CH7301_I2C_ADDR, CH7301_DC, 0x09); + i2c_reg_write(CH7301_I2C_ADDR, CH7301_PM, 0xc0); + } else { + i2c_reg_write(CH7301_I2C_ADDR, CH7301_DC, 0x00); + i2c_reg_write(CH7301_I2C_ADDR, CH7301_PM, 0x01); + } + + return 0; +} |