Kyösti Mälkki (kyosti.malkki@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/865
-gerrit
commit 391ba07000e3627ea7cc185979859ec8e3af67d5 Author: Kyösti Mälkki kyosti.malkki@gmail.com Date: Fri Apr 6 16:08:33 2012 +0300
Add SIMBA: simulator for simple buses
With simba library, I/O and memory accesses to defined regions can be handled in a simulated state machine on the host computer. There is no need to recompile Qemu, as simple state machines can be implemented within this librarys sources.
An Intel 82801 (ICH4) SMBus host controller state machine is implemented as a functional example. At the moment it only parses the transactions.
Change-Id: Ia19067aebc81450fc98ff57f01921b11fec4eecb Signed-off-by: Kyösti Mälkki kyosti.malkki@gmail.com --- SerialICE/patches/lua-5.1.4-shared.diff | 43 +++ SerialICE/simba/i82801dx.lua | 27 ++- SerialICE/util/simba/COPYING | 339 +++++++++++++++++++++ SerialICE/util/simba/Makefile | 35 +++ SerialICE/util/simba/README | 57 ++++ SerialICE/util/simba/config.h | 11 + SerialICE/util/simba/i2c-i801.h | 152 ++++++++++ SerialICE/util/simba/i82801_sim.c | 490 +++++++++++++++++++++++++++++++ SerialICE/util/simba/io_hooks.c | 167 +++++++++++ SerialICE/util/simba/io_hooks.h | 6 + SerialICE/util/simba/main.c | 155 ++++++++++ SerialICE/util/simba/simba.c | 121 ++++++++ SerialICE/util/simba/simba.h | 132 +++++++++ SerialICE/util/simba/simba_lua.c | 62 ++++ 14 files changed, 1793 insertions(+), 4 deletions(-)
diff --git a/SerialICE/patches/lua-5.1.4-shared.diff b/SerialICE/patches/lua-5.1.4-shared.diff new file mode 100644 index 0000000..9371edd --- /dev/null +++ b/SerialICE/patches/lua-5.1.4-shared.diff @@ -0,0 +1,43 @@ +diff -ur lua-5.1.4/Makefile lua-5.1.4-patched/Makefile +--- lua-5.1.4/Makefile 2008-08-12 03:40:48.000000000 +0300 ++++ lua-5.1.4-patched/Makefile 2012-04-05 12:49:40.868289537 +0300 +@@ -43,7 +43,7 @@ + # What to install. + TO_BIN= lua luac + TO_INC= lua.h luaconf.h lualib.h lauxlib.h ../etc/lua.hpp +-TO_LIB= liblua.a ++TO_LIB= liblua.a liblua.so + TO_MAN= lua.1 luac.1 + + # Lua version and release. +diff -ur lua-5.1.4/src/Makefile lua-5.1.4-patched/src/Makefile +--- lua-5.1.4/src/Makefile 2012-04-05 20:49:22.636290315 +0300 ++++ lua-5.1.4-patched/src/Makefile 2012-04-05 12:44:28.684293164 +0300 +@@ -23,6 +23,8 @@ + PLATS= aix ansi bsd freebsd generic linux macosx mingw posix solaris + + LUA_A= liblua.a ++LUA_SO= liblua.so ++ + CORE_O= lapi.o lcode.o ldebug.o ldo.o ldump.o lfunc.o lgc.o llex.o lmem.o \ + lobject.o lopcodes.o lparser.o lstate.o lstring.o ltable.o ltm.o \ + lundump.o lvm.o lzio.o +@@ -36,7 +38,7 @@ + LUAC_O= luac.o print.o + + ALL_O= $(CORE_O) $(LIB_O) $(LUA_O) $(LUAC_O) +-ALL_T= $(LUA_A) $(LUA_T) $(LUAC_T) ++ALL_T= $(LUA_A) $(LUA_T) $(LUAC_T) $(LUA_SO) + ALL_A= $(LUA_A) + + default: $(PLAT) +@@ -51,6 +53,9 @@ + $(AR) $@ $? + $(RANLIB) $@ + ++$(LUA_SO): $(CORE_O) $(LIB_O) ++ $(CC) -o $@ -shared $? ++ + $(LUA_T): $(LUA_O) $(LUA_A) + $(CC) -o $@ $(MYLDFLAGS) $(LUA_O) $(LUA_A) $(LIBS) + diff --git a/SerialICE/simba/i82801dx.lua b/SerialICE/simba/i82801dx.lua index 712be69..dc68365 100644 --- a/SerialICE/simba/i82801dx.lua +++ b/SerialICE/simba/i82801dx.lua @@ -25,29 +25,48 @@ add_pci_cfg_hook(pci_bdf(0x0,0x1f,0x0,0xe6), 2, lpc_decode_hook) -- -- SMBus controller handling
+smbus_host_hooked = false smbus_host_base = 0 smbus_host_size = 0
+require("package") + +simba_init, err, str = package.loadlib("./libsimba.so", "luaopen_simba") +if (simba_init) then + simba_init() + printf("SerialICE: SIMBA initialized\n") +else + printf("SerialICE: %s : %s\n", err, str) +end + function smbus_io_write_log(port, size, data, target) if port >= smbus_host_base and port < smbus_host_base+smbus_host_size then - return not log_smbus_io + smbus_host.write_log(port, size, data, target) + return true end end
function smbus_io_read_log(port, size, data, target) if port >= smbus_host_base and port < smbus_host_base+smbus_host_size then - return not log_smbus_io + smbus_host.read_log(port, size, data, target) + return true end end
function smbus_bar_setup(base, size)
- smbus_host_base = base + smbus_host_base = bit.band(base, bit.bnot(size-1)) smbus_host_size = size
printf("SMBus BAR set up: 0x%08x\n", smbus_host_base) - if decode_smbus then + if simba then + simba.smbus_init(smbus_host_base, smbus_host_size) + end + if (not smbus_host_hooked) and decode_smbus and smbus_host then + smbus_host_hooked = true + printf("SIMBA: SMBus decode enabled\n") + smbus_host.show_io(log_smbus_io and 1 or 0) prepend_to_list(io_write_log_hooks, smbus_io_write_log) prepend_to_list(io_read_log_hooks, smbus_io_read_log) end diff --git a/SerialICE/util/simba/COPYING b/SerialICE/util/simba/COPYING new file mode 100644 index 0000000..d511905 --- /dev/null +++ b/SerialICE/util/simba/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/SerialICE/util/simba/Makefile b/SerialICE/util/simba/Makefile new file mode 100644 index 0000000..54e27ef --- /dev/null +++ b/SerialICE/util/simba/Makefile @@ -0,0 +1,35 @@ +## +## Copyright (C) 2012 Kyösti Mälkki kyosti.malkki@gmail.com +## +## 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 +## + +CFLAGS += +LDFLAGS += -L$(cwd) -ldl -llua -lm + +cwd = $(shell pwd) + +drivers := i82801_sim.c i2c-i801.h +simba_src := simba.c simba.h simba_lua.c $(drivers) + +default: dump_smbus libsimba.so + +dump_smbus : main.c io_hooks.c io_hooks.h $(simba_src) + gcc $(CFLAGS) $(LDFLAGS) -o $@ $^ + +libsimba.so : $(simba_src) + gcc $(CFLAGS) -fPIC -shared -o $@ $^ + +clean: + -rm dump_smbus libsimba.so diff --git a/SerialICE/util/simba/README b/SerialICE/util/simba/README new file mode 100644 index 0000000..bcaa0f9 --- /dev/null +++ b/SerialICE/util/simba/README @@ -0,0 +1,57 @@ + +Serialice SMBus Host Controller simulator + +Not much here yet, but might already mostly work with many +Intel 82801 southbridges (aka ICHxx). There is a list of +PCI IDs in the i2c-i801.c file which have some chance. + +The common byte/word/block SMBus reads and writes have gone +through some testing. Process calls and i2c block variants +are not yet tested. + +NOTE: The "xx" in output means the byte was transferred on the +SMBus but firmware never read it out of the controller buffer. +On writes such bytes are to be considered as "no change". + +*** Build instructions + + $ make + +*** Command-line operation + +Input file is log output from serialice, stdout has +the smbus traffic translated into a more readable form. + + $ ./dump_smbus -h + +Parse SMBus access from SerialICE logfile +dump_smbus [-dhx] -f filename + -f file input serialice logfile + -d strips SMBus inb/outb + -x strips all but SMBus IO + + $ ./dump_smbus -f qemu_serialice_log.txt > filtered.log + $ diff -y -W 200 qemu_serialice_log.txt filtered.log + +Things one may want to change in config.h + + SMBUS_PCIFUNC : PCI function with SMBus BAR + SMBUS_BAR : PCI config register for SMBus BAR + +If BAR autodetect fails, set DEFAULT_SMBUS_HOST_BASE. + + +*** SerialICE runtime translation + +Copy libsimba.so into the same directory with serialice modular +lua scripts. Simulator library should load automatically, check +for keywords "SIMBA and SMBUS" in the log. The "log_smbus_io" +boolean set in serialice.lua controls whether to show individual +inb/outb to smbus host controller. + +It may be necessary to compile qemu to use a shared lua library +to be able to load libsimba.so. + + +Kyösti Mälkki +kyosti.malkki@gmail.com diff --git a/SerialICE/util/simba/config.h b/SerialICE/util/simba/config.h new file mode 100644 index 0000000..6475598 --- /dev/null +++ b/SerialICE/util/simba/config.h @@ -0,0 +1,11 @@ + + +/* Change these to match your ICH southbridge PCI function. */ + +#define SMBUS_PCIFUNC "0:1f.3" +#define SMBUS_BAR 0x20 + +#define DEFAULT_SMBUS_HOST_BASE 0x400 +#define SMBUS_HOST_SIZE 0x20 + + diff --git a/SerialICE/util/simba/i2c-i801.h b/SerialICE/util/simba/i2c-i801.h new file mode 100644 index 0000000..aaf15a0 --- /dev/null +++ b/SerialICE/util/simba/i2c-i801.h @@ -0,0 +1,152 @@ +/* + i2c-i801.c - Part of lm_sensors, Linux kernel modules for hardware + monitoring + Copyright (c) 1998 - 2002 Frodo Looijaard frodol@dds.nl, + Philip Edelbrock phil@netroedge.com, and Mark D. Studebaker + mdsxyz123@yahoo.com + + 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., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +/* + SUPPORTED DEVICES PCI ID + 82801AA 2413 + 82801AB 2423 + 82801BA 2443 + 82801CA/CAM 2483 + 82801DB 24C3 (HW PEC supported, 32 byte buffer not supported) + 82801EB 24D3 (HW PEC supported, 32 byte buffer not supported) + 6300ESB 25A4 ("") + ICH6 266A ("") + ICH7 27DA ("") + ESB2 269B ("") + ICH8 283E ("") + ICH9 2930 ("") + Tolapai 5032 ("") + ICH10 3A30 ("") + ICH10 3A60 ("") + + This driver supports several versions of Intel's I/O Controller Hubs (ICH). + For SMBus support, they are similar to the PIIX4 and are part + of Intel's '810' and other chipsets. + See the doc/busses/i2c-i801 file for details. + I2C Block Read not supported. + Block Process Call are not supported. +*/ + + +/* 82801CA is undefined before kernel 2.4.13 */ +#ifndef PCI_DEVICE_ID_INTEL_82801CA_3 +#define PCI_DEVICE_ID_INTEL_82801CA_3 0x2483 +#endif + +/* 82801DB is undefined before kernel 2.4.19 */ +#ifndef PCI_DEVICE_ID_INTEL_82801DB_3 +#define PCI_DEVICE_ID_INTEL_82801DB_3 0x24c3 +#endif + +/* 82801EB is undefined before kernel 2.4.21 */ +#ifndef PCI_DEVICE_ID_INTEL_82801EB_3 +#define PCI_DEVICE_ID_INTEL_82801EB_3 0x24d3 +#endif + +/* ESB is undefined before kernel 2.4.22 */ +#ifndef PCI_DEVICE_ID_INTEL_ESB_4 +#define PCI_DEVICE_ID_INTEL_ESB_4 0x25a4 +#endif + +/* ESB2 - Enterprise Southbridge is undefined */ +#ifndef PCI_DEVICE_ID_INTEL_ESB2_17 +#define PCI_DEVICE_ID_INTEL_ESB2_17 0x269b +#endif + +/* ICH6 is undefined */ +#ifndef PCI_DEVICE_ID_INTEL_ICH6_16 +#define PCI_DEVICE_ID_INTEL_ICH6_16 0x266a +#endif + +/* ICH7 is undefined */ +#ifndef PCI_DEVICE_ID_INTEL_ICH7_17 +#define PCI_DEVICE_ID_INTEL_ICH7_17 0x27da +#endif + +/* ICH8 is undefined */ +#ifndef PCI_DEVICE_ID_INTEL_ICH8_5 +#define PCI_DEVICE_ID_INTEL_ICH8_5 0x283e +#endif + +/* ICH9 is undefined */ +#ifndef PCI_DEVICE_ID_INTEL_ICH9_6 +#define PCI_DEVICE_ID_INTEL_ICH9_6 0x2930 +#endif + +#ifndef PCI_DEVICE_ID_INTEL_TOLAPAI_1 +#define PCI_DEVICE_ID_INTEL_TOLAPAI_1 0x5032 +#endif + +#ifndef PCI_DEVICE_ID_INTEL_ICH10_4 +#define PCI_DEVICE_ID_INTEL_ICH10_4 0x3a30 +#endif + +#ifndef PCI_DEVICE_ID_INTEL_ICH10_5 +#define PCI_DEVICE_ID_INTEL_ICH10_5 0x3a60 +#endif + +#ifdef I2C_CLIENT_PEC +#define HAVE_PEC +#endif + +/* I801 SMBus address offsets */ +#define SMBHSTSTS (0 + i801_smba) +#define SMBHSTCNT (2 + i801_smba) +#define SMBHSTCMD (3 + i801_smba) +#define SMBHSTADD (4 + i801_smba) +#define SMBHSTDAT0 (5 + i801_smba) +#define SMBHSTDAT1 (6 + i801_smba) +#define SMBBLKDAT (7 + i801_smba) +#define SMBPEC (8 + i801_smba) /* ICH4 only */ +#define SMBAUXSTS (12 + i801_smba) /* ICH4 only */ +#define SMBAUXCTL (13 + i801_smba) /* ICH4 only */ + +/* PCI Address Constants */ +#define SMBBA 0x020 +#define SMBHSTCFG 0x040 +#define SMBREV 0x008 + +/* Host configuration bits for SMBHSTCFG */ +#define SMBHSTCFG_HST_EN 1 +#define SMBHSTCFG_SMB_SMI_EN 2 +#define SMBHSTCFG_I2C_EN 4 + +/* Other settings */ +#define MAX_TIMEOUT 100 +#define ENABLE_INT9 0 /* set to 0x01 to enable - untested */ + +/* I801 command constants */ +#define I801_QUICK 0x00 +#define I801_BYTE 0x04 +#define I801_BYTE_DATA 0x08 +#define I801_WORD_DATA 0x0C +#define I801_PROC_CALL 0x10 /* later chips only, unimplemented */ +#define I801_BLOCK_DATA 0x14 +#define I801_I2C_BLOCK_DATA 0x18 /* unimplemented */ +#define I801_BLOCK_LAST 0x34 +#define I801_I2C_BLOCK_LAST 0x38 /* unimplemented */ +#define I801_START 0x40 +#define I801_PEC_EN 0x80 /* ich4 and later */ + + + + diff --git a/SerialICE/util/simba/i82801_sim.c b/SerialICE/util/simba/i82801_sim.c new file mode 100644 index 0000000..b28e9ad --- /dev/null +++ b/SerialICE/util/simba/i82801_sim.c @@ -0,0 +1,490 @@ +/* + * Copyright (C) 2012 Kyösti Mälkki kyosti.malkki@gmail.com + * + * 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 + */ + +#include <stdio.h> + +/* Intel 82801 SMBus Controller defines from linux src. */ +#include "i2c-i801.h" + +/* complement i2c-i801.c */ +#define i801_smba 0 +#define I801_BLOCK_PROCESS 0x1c + +#include "simba.h" + +static struct smbus_ctrl i801_smbus_controller; +static struct smbus_ctrl *host = &i801_smbus_controller; + +static unsigned int smbus_host_base = 0; +static unsigned int smbus_host_size = 0; +static int show_smbus_io = 1; + +static int passive_mode = 1; + +/* test for !passive_mode */ +void smbus_transaction(struct smbus_ctrl *host) +{ + int i; + unsigned char smb_cmd = (host->control & 0x1c); + + if (smb_is_read(host)) { + for (i=0; i<host->data0; i++) { + host->block_sram[i].hw = 0x80 + i; + host->block_sram[i].hw_valid = 1; + } + } + /* Finish all */ + host->status &= ~0x01; + host->status |= 0x02; +} + +static int smbus_completed(void); + + +static void smbus_state_switch(smb_state_t new_state) +{ + unsigned char smb_cmd = (host->control & 0x1c); + int i; + + if (new_state == host->state) { + dprintf("SMBus: state switch without switch\n"); + return; + } + + switch (new_state) { + case HOST_NOOP: + dprintf("SMBus: state switch to HOST_NOOP\n"); + new_state = HOST_IDLE_0; + break; + + case HOST_IDLE_0: + break; + + case HOST_ACTIVE_0: + /* INUSE_STS is set on SMBHSTSTS read */ + host->status = 0x0; + break; + + case HOST_ACTIVE_1: + { + host->status |= 0x01; + host->wr_data0 = host->data0; + host->wr_data1 = host->data1; + if (smb_is_read(host)) { + host->data0_valid = 0; + host->data1_valid = 0; + } + for (i=0; i<MAX_BLOCK_SRAM; i++) { + /* On block writes, previously read data in buffer is also valid. */ + if (host->block_sram[i].tmp_valid) { + host->block_sram[i].hw = host->block_sram[i].tmp; + host->block_sram[i].tmp_valid = 0; + host->block_sram[i].hw_valid = 1; + } + /* On block reads, no data in buffer is yet valid. */ + if (smb_is_read(host) && smb_cmd == I801_BLOCK_DATA) + host->block_sram[i].hw_valid = 0; + } + break; + } + + case HOST_DONE_0: + if (!smbus_completed()) + host->next_state = HOST_WAIT_0; + else + host->next_state = HOST_DONE_1; + break; + + case HOST_DONE_2: + host->next_state = host->state_completion; + break; + + case HOST_FAIL_0: + host->next_state = HOST_ACTIVE_0; + break; + + default: + break; + } + + host->new_state = new_state; +} + +static void smbus_state_run(void) +{ + smb_state_t next_state; + + while (host->state != host->new_state) { + dprintf("SMBus: state change %s -> %s\n", + ctrl_state[host->state], ctrl_state[host->new_state]); + host->state = host->new_state; + + switch (host->state) { + case HOST_DONE_1: + case HOST_DONE_2: + case HOST_FAIL_0: + smbus_dump_transaction(host); + break; + } + + next_state = host->next_state; + host->next_state = HOST_NOOP; + if (next_state != HOST_NOOP) + smbus_state_switch(next_state); + } +} + +static int smbus_completed(void) +{ + int complete = 0; + + if (!smb_is_read(host)) + return 1; + + switch (get_cmdcode(host)) { + + case SMBUS_QUICK: + complete = 1; + break; + + case SMBUS_BYTE: + complete = host->data0_valid; + break; + + case SMBUS_BYTE_DATA: + complete = host->data0_valid; + break; + + case SMBUS_WORD_DATA: + complete = host->data0_valid && host->data1_valid; + break; + + case SMBUS_BLOCK_DATA: + complete = host->data0_valid && (host->block_ptr >= host->data0); + break; + + case SMBUS_PROC_CALL: + case SMBUS_I2C_BLOCK_DATA: + case SMBUS_BLOCK_PROCESS: + default: + printf("SMBus (cmd_%02x): Unimplemented completion\n", host->smb_cmd); + break; + + } + return complete; +} + +static void smbus_signal_status(unsigned char data, unsigned char io_write) +{ + int reset_inuse = (data & 0x40); + int reset_intr = (data & 0x02); + +#if 0 + if (reset_inuse && (host->state != HOST_DONE_1)) + dprintf("SMBus: Premature reset of bit INUSE_STS\n"); +#endif + + switch (host->state) { + + case HOST_DONE_1: + if (reset_inuse && reset_intr) + smbus_state_switch(HOST_IDLE_0); + else if (reset_intr) + smbus_state_switch(HOST_ACTIVE_0); + break; + + case HOST_WAIT_0: + if (reset_inuse && reset_intr) { + host->state_completion = HOST_IDLE_0; + smbus_state_switch(HOST_WAIT_1); + } else if (reset_intr) { + host->state_completion = HOST_ACTIVE_0; + smbus_state_switch(HOST_WAIT_1); + } + break; + + case HOST_WAIT_1: + if (reset_intr) + smbus_state_switch(HOST_DONE_2); + break; + + default: + break; + } + +} + +static void smbus_signal_start(void) +{ + switch (host->state) { + case HOST_IDLE_0: + case HOST_ACTIVE_0: + smbus_state_switch(HOST_ACTIVE_1); + break; + + default: + printf("SMBus: Starting from illegal state\n"); + break; + } + + switch (host->control & 0x1c) { + + case I801_QUICK: + set_cmdcode(host, SMBUS_QUICK); + break; + + case I801_BYTE: + set_cmdcode(host, SMBUS_BYTE); + break; + + case I801_BYTE_DATA: + set_cmdcode(host, SMBUS_BYTE_DATA); + break; + + case I801_WORD_DATA: + set_cmdcode(host, SMBUS_WORD_DATA); + break; + + case I801_PROC_CALL: + set_cmdcode(host, SMBUS_PROC_CALL); + break; + + case I801_BLOCK_DATA: + set_cmdcode(host, SMBUS_BLOCK_DATA); + break; + + case I801_I2C_BLOCK_DATA: + set_cmdcode(host, SMBUS_I2C_BLOCK_DATA); + break; + + case I801_BLOCK_PROCESS: + set_cmdcode(host, SMBUS_BLOCK_PROCESS); + break; + + default: + printf("SMBus: Unknown controlcode\n"); + break; + } + +} + +/* + * + */ +static void smbus_host_status(unsigned char * data, unsigned char io_write) +{ + if (!io_write) { + if (passive_mode) + host->status = *data; + + switch (host->state) { + + case HOST_IDLE_0: + if (! (host->status & 0x40)) + smbus_state_switch(HOST_ACTIVE_0); + break; + + case HOST_ACTIVE_1: + if ((!host->status & 0x02) && (!passive_mode)) + smbus_transaction(host); + if (host->status & 0x1c) + smbus_state_switch(HOST_FAIL_0); + else if ((host->status & 0x02) && !(host->status & 0x01)) + smbus_state_switch(HOST_DONE_0); + break; + } + + if (!passive_mode) { + *data = host->status; + host->status |= 0x40; + } + } else { + if (!passive_mode) + host->status &= ~(*data); + + smbus_signal_status(*data, io_write); + } + +} + + +static void smbus_host_control(unsigned char * data, unsigned char io_write) +{ + if (!io_write) { + host->block_ptr=0; + if (!passive_mode) + *data = host->control & ~0x40; + } else { + host->control = *data; + if (host->control & 0x80) + printf("SMBus: No PEC simulation\n"); + if (host->control & 0x40) + smbus_signal_start(); + } +} + + +static void smbus_block_data(unsigned char * data, unsigned char io_write) +{ + if (passive_mode) { + if (host->block_ptr < MAX_BLOCK_SRAM) { + if (!io_write) { + host->block_sram[host->block_ptr].hw = *data; + host->block_sram[host->block_ptr].hw_valid = 1; + } + host->block_sram[host->block_ptr].tmp = *data; + host->block_sram[host->block_ptr].tmp_valid = 1; + } + } else { + if (host->block_ptr < MAX_BLOCK_SRAM) { + if (io_write) { + host->block_sram[host->block_ptr].tmp = *data; + host->block_sram[host->block_ptr].tmp_valid = 1; + } else { + *data = 0xff; + if (host->block_sram[host->block_ptr].tmp_valid) + *data = host->block_sram[host->block_ptr].tmp; + else if (host->block_sram[host->block_ptr].hw_valid) + *data = host->block_sram[host->block_ptr].hw; + } + } + } + host->block_ptr++; +} + + + +static void i82801_smbus_pre_io(unsigned char reg, unsigned char data, unsigned char io_write) +{ + switch (host->state) { + case HOST_WAIT_1: + /* Restarting previous transaction. */ + if (io_write && reg == SMBHSTCNT && data & 0x40) + smbus_state_switch(HOST_DONE_2); + + /* Programming new transaction. */ + if (io_write && reg >= SMBHSTCMD && reg <= SMBHSTDAT1) + smbus_state_switch(HOST_DONE_2); + + /* FIXME: Killing on-going transaction. */ + if (io_write && reg == SMBHSTCNT && data & 0x02) + smbus_state_switch(HOST_DONE_2); + break; + } + smbus_state_run(); +} + +static void i82801_smbus_post_io(unsigned char reg, unsigned char data, unsigned char io_write) +{ + switch (host->state) { + case HOST_WAIT_1: + if (smbus_completed()) + smbus_state_switch(HOST_DONE_2); + break; + } + smbus_state_run(); +} + +static void i82801_smbus_io(unsigned char reg, unsigned char * data, unsigned char io_write) +{ + /* In passive mode, data registers update both ways. */ + int data_write = io_write || passive_mode; + + switch (reg) { + + case SMBHSTSTS: + smbus_host_status(data, io_write); + break; + + case SMBHSTCNT: + smbus_host_control(data, io_write); + break; + + case SMBHSTCMD: + if (data_write) + host->command = *data; + else + *data = host->command; + break; + + case SMBHSTADD: + if (data_write) + host->slave = *data; + else + *data = host->slave; + break; + + case SMBHSTDAT0: + if (data_write) + host->data0 = *data; + else + *data = host->data0; + host->data0_valid = 1; + break; + + case SMBHSTDAT1: + if (data_write) + host->data1 = *data; + else + *data = host->data1; + host->data1_valid = 1; + break; + + case SMBBLKDAT: + smbus_block_data(data, io_write); + break; + + case SMBAUXCTL: + if (data_write) + host->aux_ctl = *data; + else + *data = host->aux_ctl; + break; + + default: + printf("SMBus: Unknown register 0x%02x\n", reg); + break; + } + smbus_state_run(); +} + +int serialice_smbus_io_access(unsigned int addr, unsigned int data, int io_write, int len) +{ + unsigned char reg = addr & (host->size - 1); + unsigned char cdata = data; + + i82801_smbus_pre_io(reg, data, io_write); + i82801_smbus_io(reg, (unsigned char*)&data, io_write); + if (show_smbus_io) + smbus_dump_io(io_write, addr, cdata, data); + i82801_smbus_post_io(reg, data, io_write); + return 0; +} + +void serialice_smbus_show_io(int show_io) +{ + show_smbus_io = !!show_io; +} + +void serialice_smbus_init(unsigned int base, unsigned int size) +{ + host->base = base & ~(size-1); + host->size = size; + dprintf("SMBus: base=0x%08x size=%04x\n", host->base, host->size); + smbus_state_switch(HOST_IDLE_0); +} + diff --git a/SerialICE/util/simba/io_hooks.c b/SerialICE/util/simba/io_hooks.c new file mode 100644 index 0000000..4823ae0 --- /dev/null +++ b/SerialICE/util/simba/io_hooks.c @@ -0,0 +1,167 @@ +/* + * Copyright (C) 2012 Kyösti Mälkki kyosti.malkki@gmail.com + * + * 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 + */ + +#include <stdio.h> +#include <stdlib.h> +#include <libio.h> +#include <string.h> +#include <unistd.h> + +#include "simba.h" +#include "io_hooks.h" +#include "config.h" + +static unsigned int smbus_host_base = 0; +static unsigned int smbus_host_size = 0; + +union cfg_io_register { + unsigned char r8[4]; + unsigned short r16[2]; + unsigned int r32; +}; + +typedef struct { + union cfg_io_register valid; + union cfg_io_register data; +} pci_config_reg; + +#define PCI_V23_SPACE 0x40 + +typedef struct { + char pcifunc[10]; + pci_config_reg map[PCI_V23_SPACE]; +} pci_config_space; + +pci_config_space tmpdev; + +pci_config_space sb_lpc = { + .pcifunc = SMBUS_PCIFUNC, +// .parser = sb_lpc_parser, +}; + +static pci_config_space * pci_cfg_get_bdf(char *newfunc) +{ + int i; + + if (strncmp(tmpdev.pcifunc, newfunc, sizeof(tmpdev.pcifunc))==0) + return &tmpdev; + + if (strncmp(sb_lpc.pcifunc, newfunc, sizeof(sb_lpc.pcifunc))==0) + return &sb_lpc; + + strncpy(tmpdev.pcifunc, newfunc, sizeof(tmpdev.pcifunc)); + + for (i=0; i<PCI_V23_SPACE; i++) + tmpdev.map[i].valid.r32=0; + return &tmpdev; +} + +static void pci_cfg_reg_update(pci_config_space *cfg, unsigned int reg, char len, unsigned int data) +{ + if ((reg>>2) >= PCI_V23_SPACE) + return; + + unsigned char ireg = reg & 0x03; + union cfg_io_register * rvalid = &(cfg->map[reg>>2].valid); + union cfg_io_register * rdata = &(cfg->map[reg>>2].data); + + switch (len) { + case 8: + rvalid->r8[ireg] |= 0xff; + rdata->r8[ireg] = data & 0xff; + break; + case 16: + if (ireg & 0x01) + dprintf("PCI: Bad alignment for word at %04x\n", reg); + ireg &= 0x2; + rvalid->r16[ireg] |= 0xffff; + rdata->r16[ireg] = data & 0xffff; + break; + case 32: + if (ireg & 0x03) + dprintf("PCI: Bad alignment for long at %04x\n", reg); + rvalid->r32 = 0xffffffff; + rdata->r32 = data; + break; + default: + break; + } +} + +static void pci_cfg_update(pci_config_space *cfg, unsigned int reg, unsigned int data, char io_write, char len) +{ + int vid=0, did=0; + const char *prefix[2] = {"PCI", "SubSystem" }; + pci_config_reg *pci_id; + + pci_cfg_reg_update(cfg, reg, len, data); + + if ((reg>=0x0 && reg<0x4) || (reg>=0x2c && reg<0x30)) + { + int subsys = reg>4; + pci_id = &cfg->map[reg>>2]; + vid = pci_id->valid.r8[0] && pci_id->valid.r8[1] && (pci_id->data.r16[0]!=0xffff); + did = pci_id->valid.r8[2] && pci_id->valid.r8[3] && (pci_id->data.r16[1]!=0xffff); + + if (vid && did) + dprintf("PCI_trigger: %s Vendor:Device ID = %04x:%04x\n", prefix[subsys], pci_id->data.r16[0], pci_id->data.r16[1]); + else if (vid) + dprintf("PCI_trigger: %s Vendor ID = %04x\n", prefix[subsys], pci_id->data.r16[0]); + else if (did) + dprintf("PCI_trigger: %s Device ID = %04x\n", prefix[subsys], pci_id->data.r16[1]); + } + + /* Catch SMBus Host BAR */ + if (cfg == &sb_lpc && reg>=SMBUS_BAR && reg<SMBUS_BAR+3) { + union cfg_io_register * rvalid = &cfg->map[reg>>2].valid; + union cfg_io_register * rdata = &cfg->map[reg>>2].data; + if (rvalid->r8[0] && rvalid->r8[1]) { + smbus_host_base = rdata->r16[0] & ~(SMBUS_HOST_SIZE-1); + smbus_host_size = SMBUS_HOST_SIZE; + serialice_smbus_init(smbus_host_base, smbus_host_size); + } + } +} + +int handle_pci(char *pcifunc, unsigned int reg, unsigned int data, char io_write, char len) +{ + int done=0; + + pci_config_space * cfg = pci_cfg_get_bdf(pcifunc); + pci_cfg_update(cfg, reg, data, io_write, len); + + return 0; +} + +int handle_io(unsigned int addr, unsigned int data, char io_write, int len) +{ + int done=0; + if ((addr >= smbus_host_base) && (addr < (smbus_host_base + smbus_host_size))) { + serialice_smbus_io_access(addr, data, io_write, len); + done = 1; + } + return done; +} + +void smbus_defaults_init(int smbus_show_io) +{ + smbus_host_base = DEFAULT_SMBUS_HOST_BASE; + smbus_host_size = SMBUS_HOST_SIZE; + serialice_smbus_init(smbus_host_base, smbus_host_size); + serialice_smbus_show_io(smbus_show_io); +} + diff --git a/SerialICE/util/simba/io_hooks.h b/SerialICE/util/simba/io_hooks.h new file mode 100644 index 0000000..e21ebd2 --- /dev/null +++ b/SerialICE/util/simba/io_hooks.h @@ -0,0 +1,6 @@ + + +void smbus_defaults_init(int show_smbus_io); + +int handle_pci(char *pcifunc, unsigned int reg, unsigned int data, char io_write, char len); +int handle_io(unsigned int addr, unsigned int data, char io_write, int len); diff --git a/SerialICE/util/simba/main.c b/SerialICE/util/simba/main.c new file mode 100644 index 0000000..b8cd8f4 --- /dev/null +++ b/SerialICE/util/simba/main.c @@ -0,0 +1,155 @@ +/* + * Copyright (C) 2012 Kyösti Mälkki kyosti.malkki@gmail.com + * + * 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 + */ + +#include <stdio.h> +#include <stdlib.h> +#include <libio.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> + +#include "io_hooks.h" + +/* serialice log parser */ +static char line[80]; +static char s_cmd[3]=""; +static char s_pcidev[10]=""; +static char s_addr[]="0x00000000"; +static char s_data[]="0x00000000"; +static char s_reg[]="0x00"; + +static int try_parse_io(const char * line) +{ + unsigned int addr, data; + int valid=0, len=0; + + valid = sscanf(line, "IO: %*4s %8s %2s %8s", &s_addr[2], &s_cmd[0], &s_data[2]) == 3; + if (!valid) + return 0; + + valid &= (sscanf(s_addr, "%x", &addr)==1); + valid &= (sscanf(s_data, "%x", &data)==1); + len = 4 * (strlen(s_data) - 2); + + if (valid && strcmp("=>", s_cmd)==0) + valid = handle_io(addr, data, 0, len); + else if (valid && strcmp("<=", s_cmd)==0) + valid = handle_io(addr, data, 1, len); + + return valid; +} + +static int try_parse_pci(const char * line) +{ + unsigned int addr, data, reg; + int valid=0, len=0; + + valid = sscanf(line, "PCI %6s R.%2s %2s %8s", &s_pcidev[0], &s_reg[2], &s_cmd[0], &s_data[2]) == 4; + if (!valid) + return 0; + + valid &= (sscanf(s_reg, "%x", ®)==1); + valid &= (sscanf(s_data, "%x", &data)==1); + len = 4 * (strlen(s_data) - 2); + if (valid && strcmp("=>", s_cmd)==0) + valid = handle_pci(s_pcidev, reg, data, 0, len); + else if (valid && strcmp("<=", s_cmd)==0) + valid = handle_pci(s_pcidev, reg, data, 1, len); + + return valid; +} + + +void usage(void) +{ + printf( "Parse SMBus access from SerialICE logfile\n" + "dump_smbus [-dhx] -f filename\n" + "\t-f file input serialice logfile\n" + "\t-d strips SMBus inb/outb\n" + "\t-x strips all but SMBus IO\n"); +} + +int main(int argc, char *argv[]) +{ + char * filename = NULL; + int show_smbus_only = 0; + int show_smbus_io = 1; + int c; + FILE *txtlog; + + while ((c = getopt (argc, argv, "df:hx")) != -1) { + switch (c) { + case 'd': + show_smbus_io = 0; + break; + case 'f': + filename = optarg; + break; + case 'h': + usage(); + exit(0); + break; + case 'x': + show_smbus_only = 1; + break; + case '?': + if (optopt == 'f') + fprintf (stderr, "Option -%c requires an argument.\n", optopt); + else if (isprint (optopt)) + fprintf (stderr, "Unknown option `-%c'.\n", optopt); + else + fprintf (stderr, "Unknown option character `\x%x'.\n", optopt); + return 1; + default: + abort (); + } + } + + if (! filename) { + usage(); + exit(1); + } + + txtlog = fopen(filename, "r"); + if (! txtlog) { + printf("File %s : %s\n", filename, strerror(errno)); + exit(2); + } + + smbus_defaults_init(show_smbus_io); + + while (!feof(txtlog)) { + int done = 0, show = 0; + + fgets(line, sizeof(line), txtlog); + + if (!done) { + done = try_parse_io(line); + } + + if (!done) + done = try_parse_pci(line); + + if (!done && !show_smbus_only) + fputs(line, stdout); + continue; + } + + fclose(txtlog); + exit(0); +} + diff --git a/SerialICE/util/simba/simba.c b/SerialICE/util/simba/simba.c new file mode 100644 index 0000000..dcdea47 --- /dev/null +++ b/SerialICE/util/simba/simba.c @@ -0,0 +1,121 @@ +/* + * Copyright (C) 2012 Kyösti Mälkki kyosti.malkki@gmail.com + * + * 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 + */ + +#include <stdio.h> +#include <string.h> +#include "simba.h" + +void smbus_dump_block(struct smbus_ctrl *host) +{ + int i; + for (i=0; i<host->data0 && i<MAX_BLOCK_SRAM; i++) { + if (host->block_sram[i].hw_valid) + printf(" %02x", host->block_sram[i].hw); + else + printf(" xx"); + } +} + +void smbus_dump_io(unsigned char io_write, unsigned int reg, unsigned char pre_data, unsigned char post_data) +{ + const char *moded[2] = {" !!", "" }; + if (io_write) + printf("IO: outb %04x <= %02x%s\n", reg, post_data, + moded[pre_data==post_data]); + else + printf("IO: inb %04x => %02x%s\n", reg, post_data, + moded[pre_data==post_data]); +} + +void smbus_dump_transaction(struct smbus_ctrl *host) +{ + const char invalid[] = "xx"; + const char *iodir[2] = { "<=", "=>" }; + const char *dir = smb_is_read(host) ? iodir[1] : iodir[0]; + char data0[4], data1[4]; + int length; + + if (host->data0_valid) { + length = host->data0; + sprintf(data0, "%02x", host->data0); + } else { + length = 0; + strncpy(data0, invalid, sizeof(data0)); + } + + if (host->data1_valid) + sprintf(data1, "%02x", host->data1); + else + strncpy(data1, invalid, sizeof(data1)); + + printf("SMBus: 00:%02x proto=%02x ", smb_client(host), get_cmdcode(host)); + + if (host->state == HOST_FAIL_0) { + printf("Failed transaction (%s)\n", dir); + return; + } + + switch (get_cmdcode(host)) { + + case SMBUS_QUICK: + printf("\n"); + break; + + case SMBUS_BYTE: + printf("%02x %s %s\n", host->command, dir, data0); + break; + + case SMBUS_BYTE_DATA: + printf("%02x %s %s\n", host->command, dir, data0); + break; + + case SMBUS_WORD_DATA: + printf("%02x %s %s%s\n", host->command, dir, data0, data1); + break; + + case SMBUS_PROC_CALL: + printf("%02x %02x %02x %s %s %s\n", + host->command, host->wr_data0, host->wr_data1, + iodir[1], data0, data1); + break; + + case SMBUS_BLOCK_DATA: + printf("%02x len=%02d %s", host->command, length, dir); + smbus_dump_block(host); + printf("\n"); + break; + + case SMBUS_I2C_BLOCK_DATA: + printf("%02x %02x %02x len=%02d %s", + host->command, host->data0, host->data1, host->block_ptr, dir); + smbus_dump_block(host); + printf("\n"); + break; + + case SMBUS_BLOCK_PROCESS: + printf("%02x len=%02d %s", host->command, length, iodir[1]); + smbus_dump_block(host); + printf("\n"); + break; + + default: + printf("Cannot parse command\n"); + break; + } +} + + diff --git a/SerialICE/util/simba/simba.h b/SerialICE/util/simba/simba.h new file mode 100644 index 0000000..b048e10 --- /dev/null +++ b/SerialICE/util/simba/simba.h @@ -0,0 +1,132 @@ +/* + * Copyright (C) 2012 Kyösti Mälkki kyosti.malkki@gmail.com + * + * 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 + */ + + +/* Our SMBus Host Simulator states. */ +typedef enum { + HOST_NOOP, + HOST_IDLE_0, + HOST_ACTIVE_0, + HOST_ACTIVE_1, + HOST_DONE_0, + HOST_DONE_1, + HOST_DONE_2, + HOST_WAIT_0, + HOST_WAIT_1, + HOST_FAIL_0, +} smb_state_t; + +static const char *ctrl_state[] = { + "noop", + "idle_0", + "active_0", + "active_1", + "done_0", + "done_1", + "done_2", + "wait_0", + "wait_1", + "fail_0", +}; + +typedef enum { + SMBUS_NOOP, + SMBUS_QUICK, + SMBUS_BYTE, + SMBUS_BYTE_DATA, + SMBUS_WORD_DATA, + SMBUS_PROC_CALL, + SMBUS_BLOCK_DATA, + SMBUS_I2C_BLOCK_DATA, + SMBUS_BLOCK_PROCESS, +} smb_cmd_t; + + +#define MAX_BLOCK_SRAM 32 + + +struct sram_buf { + unsigned char hw; + unsigned char hw_valid; + unsigned char tmp; + unsigned char tmp_valid; +}; + +struct smbus_ctrl { + + /* IO region */ + unsigned int base; + unsigned int size; + + /* HW registers */ + unsigned char status; + unsigned char control; + unsigned char command; + unsigned char slave; + unsigned char data0; + unsigned char data1; + unsigned char aux_ctl; + + unsigned char data0_valid; + unsigned char data1_valid; + + /* for state machine */ + smb_state_t state; + smb_state_t new_state; + smb_state_t next_state; + smb_state_t state_completion; + smb_cmd_t smb_cmd; + + /* for E32B */ + unsigned char block_ptr; + unsigned char max_block_ptr; + struct sram_buf block_sram[MAX_BLOCK_SRAM]; + + /* for Process Call */ + unsigned char wr_data0; + unsigned char wr_data1; +}; + + +#if DEBUG +#define dprintf(x, ...) do { printf(x, ## __VA_ARGS__); } while (0) +#else +#define dprintf(x, ...) do { } while (0) +#endif + + +#define smb_is_read(x) (x->slave & 0x01) +#define smb_client(x) (x->slave >> 1) + +static inline void set_cmdcode(struct smbus_ctrl *host, int code) +{ + host->smb_cmd = (code<<1) | smb_is_read(host); +} + +static inline int get_cmdcode(struct smbus_ctrl *host) +{ + return (host->smb_cmd>>1); +} + +void smbus_dump_block(struct smbus_ctrl *host); +void smbus_dump_transaction(struct smbus_ctrl *host); +void smbus_dump_io(unsigned char io_write, unsigned int reg, unsigned char pre_data, unsigned char post_data); + +void serialice_smbus_init(unsigned int base, unsigned int size); +void serialice_smbus_show_io(int show_io); +int serialice_smbus_io_access(unsigned int addr, unsigned int data, int io_write, int len); + diff --git a/SerialICE/util/simba/simba_lua.c b/SerialICE/util/simba/simba_lua.c new file mode 100644 index 0000000..b31c1e1 --- /dev/null +++ b/SerialICE/util/simba/simba_lua.c @@ -0,0 +1,62 @@ + + +#include <lua.h> +#include <lauxlib.h> + +static int l_smbus_show_io(lua_State *L) +{ + int show_io = lua_tonumber(L, 1); + serialice_smbus_show_io(show_io); + return 0; +} + +static int l_smbus_read_log(lua_State *L) +{ + unsigned int addr = lua_tonumber(L, 1); + unsigned int size = lua_tonumber(L, 2); + unsigned int data = lua_tonumber(L, 3); + serialice_smbus_io_access(addr, data, 0, size); + return 0; +} + +static int l_smbus_write_log(lua_State *L) +{ + unsigned int addr = lua_tonumber(L, 1); + unsigned int size = lua_tonumber(L, 2); + unsigned int data = lua_tonumber(L, 3); + serialice_smbus_io_access(addr, data, 1, size); + return 0; +} + +static const struct luaL_reg smbus_hostsim_lib [] = { + {"show_io", l_smbus_show_io}, + {"read_log", l_smbus_read_log}, + {"write_log", l_smbus_write_log}, + {NULL, NULL} /* sentinel */ +}; + +static int l_smbus_init(lua_State *L) +{ + unsigned int base = lua_tonumber(L, 1); + unsigned int size = lua_tonumber(L, 2); + + serialice_smbus_init(base, size); + luaL_openlib(L, "smbus_host", smbus_hostsim_lib, 0); + return 1; +} + +/* + * + */ + +static const struct luaL_reg simba_lib [] = { + {"smbus_init", l_smbus_init}, + {NULL, NULL} /* sentinel */ +}; + +int luaopen_simba(lua_State *L) +{ + luaL_openlib(L, "simba", simba_lib, 0); + return 1; +} +