diff options
| -rw-r--r-- | src/soc/intel/braswell/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/braswell/include/soc/smbus.h | 26 | ||||
| -rw-r--r-- | src/soc/intel/braswell/smbus.c | 32 |
3 files changed, 59 insertions, 0 deletions
diff --git a/src/soc/intel/braswell/Makefile.inc b/src/soc/intel/braswell/Makefile.inc index 1017d80c65..cc111da485 100644 --- a/src/soc/intel/braswell/Makefile.inc +++ b/src/soc/intel/braswell/Makefile.inc @@ -35,6 +35,7 @@ ramstage-$(CONFIG_ELOG) += elog.c ramstage-y += emmc.c ramstage-y += gpio.c ramstage-y += gfx.c +ramstage-y += smbus.c ramstage-y += gpio_support.c ramstage-y += iosf.c diff --git a/src/soc/intel/braswell/include/soc/smbus.h b/src/soc/intel/braswell/include/soc/smbus.h new file mode 100644 index 0000000000..8bc62f7eec --- /dev/null +++ b/src/soc/intel/braswell/include/soc/smbus.h @@ -0,0 +1,26 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * Copyright (C) 2015 Intel Corp. + * Copyright (C) 2019 Eltan B.V. + * + * 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. + */ + +#ifndef _SOC_SMBUS_H_ +#define _SOC_SMBUS_H_ + +/* PCI Configuration Space SMBus */ +#define HOSTC 0x40 +#define HOSTC_I2C_EN (1 << 2) + +int smbus_i2c_block_write(u8 addr, u8 bytes, u8 *buf); +#endif /* _SOC_SMBUS_H_ */ diff --git a/src/soc/intel/braswell/smbus.c b/src/soc/intel/braswell/smbus.c index 7e1b0dfbb0..1dfd4c7ecd 100644 --- a/src/soc/intel/braswell/smbus.c +++ b/src/soc/intel/braswell/smbus.c @@ -3,6 +3,7 @@ * * Copyright (C) 2017 Intel Corporation. * Copyright (C) 2019 3mdeb + * Copyright (C) 2019 Eltan B.V. * * 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 @@ -16,6 +17,11 @@ #include <device/early_smbus.h> #include <soc/iomap.h> +#include <soc/pci_devs.h> +#include <device/pci_def.h> +#include <device/pci_type.h> +#include <device/pci_ops.h> +#include <soc/smbus.h> #include <southbridge/intel/common/smbus.h> u8 smbus_read_byte(u32 smbus_dev, u8 addr, u8 offset) @@ -27,3 +33,29 @@ u8 smbus_write_byte(u32 smbus_dev, u8 addr, u8 offset, u8 value) { return do_smbus_write_byte(SMBUS_BASE_ADDRESS, addr, offset, value); } + +int smbus_i2c_block_write(u8 addr, u8 bytes, u8 *buf) +{ +#ifdef __SIMPLE_DEVICE__ + pci_devfn_t dev = PCI_DEV(0, SMBUS_DEV, SMBUS_FUNC); +#else + struct device *dev = pcidev_on_root(SMBUS_DEV, SMBUS_FUNC); +#endif + u32 smbase; + u32 smb_ctrl_reg; + int status; + + /* SMBus I/O BAR */ + smbase = pci_read_config32(dev, PCI_BASE_ADDRESS_4) & 0xFFFFFFFE; + + /* Enable I2C_EN bit in HOSTC register */ + smb_ctrl_reg = pci_read_config32(dev, HOSTC); + pci_write_config32(dev, HOSTC, smb_ctrl_reg | HOSTC_I2C_EN); + + status = do_i2c_block_write(smbase, addr, bytes, buf); + + /* Restore I2C_EN bit */ + pci_write_config32(dev, HOSTC, smb_ctrl_reg); + + return status; +} |