Alexandru Gagniuc ([email protected]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/144
-gerrit commit efa4eabbf4a197726d351685d48b61edfa202f06 Author: Alexandru Gagniuc <[email protected]> Date: Tue Aug 9 02:00:43 2011 -0500 smbus: Example of how to use generic smbus code NOTFORMERGE Change-Id: If5ad8cd0942ac02d358a0139967e7d85d395660f Signed-off-by: Alexandru Gagniuc <[email protected]> --- src/northbridge/via/vx900/Kconfig | 23 ++++ src/northbridge/via/vx900/Makefile.inc | 33 +++++ src/northbridge/via/vx900/early_smbus.c | 194 +++++++++++++++++++++++++++++++ src/northbridge/via/vx900/early_vx900.h | 31 +++++ src/northbridge/via/vx900/romstrap.inc | 50 ++++++++ src/northbridge/via/vx900/romstrap.lds | 27 +++++ src/northbridge/via/vx900/vx900.h | 26 ++++ 7 files changed, 384 insertions(+), 0 deletions(-) diff --git a/src/northbridge/via/vx900/Kconfig b/src/northbridge/via/vx900/Kconfig new file mode 100644 index 0000000..60e7993 --- /dev/null +++ b/src/northbridge/via/vx900/Kconfig @@ -0,0 +1,23 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2011 Alexandru Gagniuc <[email protected]> +## +## 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 3 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, see <http://www.gnu.org/licenses/>. +## + +config NORTHBRIDGE_VIA_VX900 + bool + select HAVE_DEBUG_RAM_SETUP + select HAVE_DEBUG_SMBUS \ No newline at end of file diff --git a/src/northbridge/via/vx900/Makefile.inc b/src/northbridge/via/vx900/Makefile.inc new file mode 100644 index 0000000..5450b1d --- /dev/null +++ b/src/northbridge/via/vx900/Makefile.inc @@ -0,0 +1,33 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2011 Alexandru Gagniuc <[email protected]> +## +## 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 3 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, see <http://www.gnu.org/licenses/>. +## + +romstage-y += early_smbus.c +romstage-y += raminit_ddr3.c +romstage-y += ./../../../devices/dram/dram_util.c +romstage-y += ./../../../devices/smbus/early_smbus.c + +# Drivers for these devices already exist with the vx800 +# Use those instead of duplicating code + +driver-y += ./../vx800/northbridge.c +driver-y += ./../vx800/vga.c +driver-y += ./../vx800/lpc.c + +chipset_bootblock_inc += $(src)/northbridge/via/vx900/romstrap.inc +chipset_bootblock_lds += $(src)/northbridge/via/vx900/romstrap.lds \ No newline at end of file diff --git a/src/northbridge/via/vx900/early_smbus.c b/src/northbridge/via/vx900/early_smbus.c new file mode 100644 index 0000000..707bd10 --- /dev/null +++ b/src/northbridge/via/vx900/early_smbus.c @@ -0,0 +1,194 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Alexandru Gagniuc <[email protected]> + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#include <device/pci_ids.h> +#include "early_vx900.h" + +#include <arch/io.h> +#include <arch/romcc_io.h> +#include <console/console.h> +#include <devices/dram/dram.h> + +#define SMBUS_IO_BASE 0x500 +#include <devices/smbus/smbus.h> + +__attribute__((unused)) +static void smbus_delays(int delays) +{ + while(delays--) __smbus_delay(); +} + + +/** + * Read a byte from the SMBus. + * + * @param dimm The address location of the DIMM on the SMBus. + * @param offset The offset the data is located at. + */ +u8 __smbus_read_byte(u8 dimm, u8 offset, u16 __smbus_io_base) +{ + u8 val; + + /* Initialize SMBUS sequence */ + smbus_reset(); + /* Clear host data port. */ + outb(0x00, SMBHSTDAT0); + + smbus_wait_until_ready(); + smbus_delays(50); + + /* Actual addr to reg format. */ + dimm = (dimm << 1); + dimm |= 1; /* read command */ + outb(dimm, SMBXMITADD); + outb(offset, SMBHSTCMD); + /* Start transaction, byte data read. */ + outb(0x48, SMBHSTCTL); + smbus_wait_until_ready(); + + val = inb(SMBHSTDAT0); + return val; +} + +void enable_smbus(void) +{ + device_t dev; + u8 reg8; + u16 __smbus_io_base = SMBUS_IO_BASE; + + /* Locate the Power Management control */ + dev = pci_locate_device(PCI_ID(PCI_VENDOR_ID_VIA, + PCI_DEVICE_ID_VIA_VX900_LPC), 0); + + if (dev == PCI_DEV_INVALID) { + die("Power Managment Controller not found\n"); + } + + /* + * To use SMBus to manage devices on the system board, it is a must to + * enable SMBus function by setting + * PMU_RXD2[0] (SMBus Controller Enable) to 1. + * And set PMU_RXD0 and PMU_RXD1 (SMBus I/O Base) to an appropriate + * I/O port address, so that all registers in SMBus I/O port can be + * accessed. + */ + + reg8 = pci_read_config8(dev, 0xd2); + /* Enable SMBus controller */ + reg8 |= 1; + /* Set SMBUS clock from 128k source */ + reg8 |= 1<<2; + pci_write_config8(dev, 0xd2, reg8); + + reg8 = pci_read_config8(dev, 0x94); + /* SMBUS clock from divider of 14.318 MHz */ + reg8 &= ~(1<<7); + pci_write_config8(dev, 0x94, reg8); + + /* Set SMBus IO base */ + pci_write_config16(dev, 0xd0, SMBUS_IO_BASE); + + /* + * Initialize the SMBus sequence: + */ + /* Clear SMBus host status register */ + smbus_reset(); + /* Clear SMBus host data 0 register */ + outb(0x00, SMBHSTDAT0); + + /* Wait for SMBUS */ + smbus_wait_until_ready(); + +} + +void spd_read(u8 addr, spd_raw_data spd) +{ + u8 reg; + int i, regs; + reg = smbus_read_byte(addr, 2); + if(reg != 0x0b) + { + printk(BIOS_DEBUG, "SMBUS device %x not a DDR3 module\n", addr); + spd[2] = 0; + return; + } + + reg = smbus_read_byte(addr, 0); + reg &= 0xf; + if (reg == 0x3) { + regs = 256; + } else if (reg == 0x2) { + regs = 176; + } else if (reg == 0x1) { + regs = 128; + } else { + printk(BIOS_INFO, "No DIMM present at %x\n", addr); + spd[2] = 0; + return; + } + printk(BIOS_DEBUG, "SPD Data for DIMM %x \n", addr); + for (i = 0; i < regs; i++) { + reg = smbus_read_byte(addr, i); + //printk(BIOS_DEBUG, " Offset %u = 0x%x \n", i, reg ); + spd[i] = reg; + } +} + +void dump_spd_data(void) +{ + int dimm, offset, regs; + unsigned int reg; + spd_raw_data spd; + dimm_attr dimmx; + + for (dimm = 0x50; dimm < 0x52; dimm++) { + reg = smbus_read_byte(dimm, 2); + if(reg != 0x0b) + { + printk(BIOS_DEBUG, + "SMBUS device %x not a DDR3 module\n", dimm); + continue; + } + + reg = smbus_read_byte(dimm, 0); + reg &= 0xf; + if (reg == 0x3) { + regs = 256; + } else if (reg == 0x2) { + regs = 176; + } else if (reg == 0x1) { + regs = 128; + } else { + printk(BIOS_INFO, "No DIMM present at %x\n", dimm); + regs = 0; + continue; + } + printk(BIOS_DEBUG, "SPD Data for DIMM %x \n", dimm); + for (offset = 0; offset < regs; offset++) { + reg = smbus_read_byte(dimm, offset); + //printk(BIOS_DEBUG, " Offset %u = 0x%x \n", offset, reg ); + spd[offset] = reg; + } + + spd_decode_ddr3(&dimmx, spd); + dram_print_spd_ddr3(&dimmx); + + } +} + diff --git a/src/northbridge/via/vx900/early_vx900.h b/src/northbridge/via/vx900/early_vx900.h new file mode 100644 index 0000000..798cac0 --- /dev/null +++ b/src/northbridge/via/vx900/early_vx900.h @@ -0,0 +1,31 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Alexandru Gagniuc <[email protected]> + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#ifndef EARLY_VX900_H +#define EARLY_VX900_H + +#include <stdint.h> + +#include "raminit.h" + +void enable_smbus(void); +void dump_spd_data(void); +void spd_read(u8 addr, spd_raw_data spd); + +#endif /* EARLY_VX900_H */ diff --git a/src/northbridge/via/vx900/romstrap.inc b/src/northbridge/via/vx900/romstrap.inc new file mode 100644 index 0000000..8e54627 --- /dev/null +++ b/src/northbridge/via/vx900/romstrap.inc @@ -0,0 +1,50 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2004 Tyan Computer + * (Written by Yinghai Lu <[email protected]> for Tyan Computer) + * Copyright (C) 2007 Rudolf Marek <[email protected]> + * Copyright (C) 2009 One Laptop per Child, Association, Inc. + * Copyright (C) 2011 Alexandru Gagniuc <[email protected]> + * + * 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. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* This file constructs the ROM strap table for VX900 */ + + .section ".romstrap", "a", @progbits + + .globl __romstrap_start +__romstrap_start: +tblpointer: + .long 0x77886047 + .long 0x00777777 + .long 0x00000000 + .long 0x00000000 + .long 0x00888888 + .long 0x00AA1111 + .long 0x00000000 + .long 0x00000000 + +/* + * The pointer to above table should be at 0xffffffd0, + * the table itself MUST be aligned to 128B it seems! + */ +rspointers: + .long tblpointer // It will be 0xffffffd0 + + .globl __romstrap_end + +__romstrap_end: +.previous diff --git a/src/northbridge/via/vx900/romstrap.lds b/src/northbridge/via/vx900/romstrap.lds new file mode 100644 index 0000000..b51c979 --- /dev/null +++ b/src/northbridge/via/vx900/romstrap.lds @@ -0,0 +1,27 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007 AMD + * (Written by Yinghai Lu <[email protected]> for AMD) + * Copyright (C) 2011 Alexandru Gagniuc <[email protected]> + * + * 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 3 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, see <http://www.gnu.org/licenses/> + */ + +SECTIONS { + . = (0x100000000 - 0x2c) - (__romstrap_end - __romstrap_start); + .romstrap (.): { + *(.romstrap) + } +} diff --git a/src/northbridge/via/vx900/vx900.h b/src/northbridge/via/vx900/vx900.h new file mode 100644 index 0000000..2137daf --- /dev/null +++ b/src/northbridge/via/vx900/vx900.h @@ -0,0 +1,26 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Alexandru Gagniuc <[email protected]> + * + * 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 3 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, see <http://www.gnu.org/licenses/>. + */ + +#define VX800_ACPI_IO_BASE 0x0400 + +#define VX900_NB_IOAPIC_ID 0x2 +#define VX900_NB_IOAPIC_BASE 0xfecc000 + +#define VX900_SB_IOAPIC_ID 0x1 +#define VX900_SB_IOAPIC_BASE 0xfec0000 \ No newline at end of file -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
