Re: [Qemu-devel] [PATCH v3 01/16] i2c: Split smbus into parts

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 26/11/18 21:04, minyard@acm.org wrote:
> From: Corey Minyard <cminyard@mvista.com>
> 
> smbus.c and smbus.h had device side code, master side code, and
> smbus.h has some smbus_eeprom.c definitions.  Split them into
> separate files.
> 
> Signed-off-by: Corey Minyard <cminyard@mvista.com>
> ---
>  MAINTAINERS                               |  12 ++
>  hw/arm/aspeed.c                           |   2 +-
>  hw/i2c/Makefile.objs                      |   2 +-
>  hw/i2c/pm_smbus.c                         |   2 +-
>  hw/i2c/smbus_eeprom.c                     |   3 +-
>  hw/i2c/smbus_ich9.c                       |   2 -
>  hw/i2c/smbus_master.c                     | 165 ++++++++++++++++++++++
>  hw/i2c/{smbus.c => smbus_slave.c}         | 153 +-------------------
>  hw/i386/pc_piix.c                         |   2 +-
>  hw/i386/pc_q35.c                          |   2 +-
>  hw/isa/vt82c686.c                         |   1 -
>  hw/mips/mips_fulong2e.c                   |   2 +-
>  hw/mips/mips_malta.c                      |   2 +-
>  hw/ppc/sam460ex.c                         |   2 +-
>  include/hw/i2c/pm_smbus.h                 |   2 +
>  include/hw/i2c/smbus_eeprom.h             |  32 +++++
>  include/hw/i2c/smbus_master.h             |  55 ++++++++
>  include/hw/i2c/{smbus.h => smbus_slave.h} |  37 +----
>  18 files changed, 285 insertions(+), 193 deletions(-)
>  create mode 100644 hw/i2c/smbus_master.c
>  rename hw/i2c/{smbus.c => smbus_slave.c} (64%)
>  create mode 100644 include/hw/i2c/smbus_eeprom.h
>  create mode 100644 include/hw/i2c/smbus_master.h
>  rename include/hw/i2c/{smbus.h => smbus_slave.h} (65%)
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 0499e11593..62340d32b8 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1935,6 +1935,18 @@ M: Viktor Prutyanov <viktor.prutyanov@phystech.edu>
>  S: Maintained
>  F: contrib/elf2dmp/
>  
> +I2C

Maybe "I2C and SMBus"

> +M: Corey Minyard <cminyard@mvista.com>
> +S: Maintained
> +F: hw/i2c/core.c
> +F: hw/i2c/smbus_slave.c
> +F: hw/i2c/smbus_master.c
> +F: hw/i2c/smbus_eeprom.c
> +F: include/hw/i2c/i2c.h
> +F: include/hw/i2c/smbus_master.h
> +F: include/hw/i2c/smbus_slave.h
> +F: include/hw/i2c/smbus_eeprom.h
> +
>  Usermode Emulation
>  ------------------
>  Overall
> diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
> index 6b33ecd5aa..69a19df00d 100644
> --- a/hw/arm/aspeed.c
> +++ b/hw/arm/aspeed.c
> @@ -18,7 +18,7 @@
>  #include "hw/arm/aspeed.h"
>  #include "hw/arm/aspeed_soc.h"
>  #include "hw/boards.h"
> -#include "hw/i2c/smbus.h"
> +#include "hw/i2c/smbus_eeprom.h"
>  #include "qemu/log.h"
>  #include "sysemu/block-backend.h"
>  #include "hw/loader.h"
> diff --git a/hw/i2c/Makefile.objs b/hw/i2c/Makefile.objs
> index 37cacde978..8973edfa22 100644
> --- a/hw/i2c/Makefile.objs
> +++ b/hw/i2c/Makefile.objs
> @@ -1,4 +1,4 @@
> -common-obj-$(CONFIG_I2C) += core.o smbus.o smbus_eeprom.o
> +common-obj-$(CONFIG_I2C) += core.o smbus_slave.o smbus_master.o smbus_eeprom.o
>  common-obj-$(CONFIG_DDC) += i2c-ddc.o
>  common-obj-$(CONFIG_VERSATILE_I2C) += versatile_i2c.o
>  common-obj-$(CONFIG_ACPI_X86) += smbus_ich9.o
> diff --git a/hw/i2c/pm_smbus.c b/hw/i2c/pm_smbus.c
> index 685a2378ed..f3c6cc46f9 100644
> --- a/hw/i2c/pm_smbus.c
> +++ b/hw/i2c/pm_smbus.c
> @@ -20,7 +20,7 @@
>  #include "qemu/osdep.h"
>  #include "hw/hw.h"
>  #include "hw/i2c/pm_smbus.h"
> -#include "hw/i2c/smbus.h"
> +#include "hw/i2c/smbus_master.h"
>  
>  #define SMBHSTSTS       0x00
>  #define SMBHSTCNT       0x02
> diff --git a/hw/i2c/smbus_eeprom.c b/hw/i2c/smbus_eeprom.c
> index f18aa3de35..d82423aa7e 100644
> --- a/hw/i2c/smbus_eeprom.c
> +++ b/hw/i2c/smbus_eeprom.c
> @@ -25,7 +25,8 @@
>  #include "qemu/osdep.h"
>  #include "hw/hw.h"
>  #include "hw/i2c/i2c.h"
> -#include "hw/i2c/smbus.h"
> +#include "hw/i2c/smbus_slave.h"
> +#include "hw/i2c/smbus_eeprom.h"
>  
>  //#define DEBUG
>  
> diff --git a/hw/i2c/smbus_ich9.c b/hw/i2c/smbus_ich9.c
> index 2a8b49e02f..e6d8d28194 100644
> --- a/hw/i2c/smbus_ich9.c
> +++ b/hw/i2c/smbus_ich9.c
> @@ -29,8 +29,6 @@
>  #include "hw/i2c/pm_smbus.h"
>  #include "hw/pci/pci.h"
>  #include "sysemu/sysemu.h"
> -#include "hw/i2c/i2c.h"
> -#include "hw/i2c/smbus.h"
>  
>  #include "hw/i386/ich9.h"
>  
> diff --git a/hw/i2c/smbus_master.c b/hw/i2c/smbus_master.c
> new file mode 100644
> index 0000000000..0a6223744c
> --- /dev/null
> +++ b/hw/i2c/smbus_master.c
> @@ -0,0 +1,165 @@
> +/*
> + * QEMU SMBus host (master) emulation.
> + *
> + * This code emulates SMBus transactions from the master point of view,
> + * it runs the individual I2C transaction to do the SMBus protocol
> + * over I2C.
> + *
> + * Copyright (c) 2007 CodeSourcery.
> + * Written by Paul Brook
> + *
> + * This code is licensed under the LGPL.
> + */
> +
> +#include "qemu/osdep.h"
> +#include "hw/hw.h"
> +#include "hw/i2c/i2c.h"
> +#include "hw/i2c/smbus_master.h"
> +
> +/* Master device commands.  */
> +int smbus_quick_command(I2CBus *bus, uint8_t addr, int read)
> +{
> +    if (i2c_start_transfer(bus, addr, read)) {
> +        return -1;
> +    }
> +    i2c_end_transfer(bus);
> +    return 0;
> +}
> +
> +int smbus_receive_byte(I2CBus *bus, uint8_t addr)
> +{
> +    uint8_t data;
> +
> +    if (i2c_start_transfer(bus, addr, 1)) {
> +        return -1;
> +    }
> +    data = i2c_recv(bus);
> +    i2c_nack(bus);
> +    i2c_end_transfer(bus);
> +    return data;
> +}
> +
> +int smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data)
> +{
> +    if (i2c_start_transfer(bus, addr, 0)) {
> +        return -1;
> +    }
> +    i2c_send(bus, data);
> +    i2c_end_transfer(bus);
> +    return 0;
> +}
> +
> +int smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command)
> +{
> +    uint8_t data;
> +    if (i2c_start_transfer(bus, addr, 0)) {
> +        return -1;
> +    }
> +    i2c_send(bus, command);
> +    if (i2c_start_transfer(bus, addr, 1)) {
> +        i2c_end_transfer(bus);
> +        return -1;
> +    }
> +    data = i2c_recv(bus);
> +    i2c_nack(bus);
> +    i2c_end_transfer(bus);
> +    return data;
> +}
> +
> +int smbus_write_byte(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t data)
> +{
> +    if (i2c_start_transfer(bus, addr, 0)) {
> +        return -1;
> +    }
> +    i2c_send(bus, command);
> +    i2c_send(bus, data);
> +    i2c_end_transfer(bus);
> +    return 0;
> +}
> +
> +int smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command)
> +{
> +    uint16_t data;
> +    if (i2c_start_transfer(bus, addr, 0)) {
> +        return -1;
> +    }
> +    i2c_send(bus, command);
> +    if (i2c_start_transfer(bus, addr, 1)) {
> +        i2c_end_transfer(bus);
> +        return -1;
> +    }
> +    data = i2c_recv(bus);
> +    data |= i2c_recv(bus) << 8;
> +    i2c_nack(bus);
> +    i2c_end_transfer(bus);
> +    return data;
> +}
> +
> +int smbus_write_word(I2CBus *bus, uint8_t addr, uint8_t command, uint16_t data)
> +{
> +    if (i2c_start_transfer(bus, addr, 0)) {
> +        return -1;
> +    }
> +    i2c_send(bus, command);
> +    i2c_send(bus, data & 0xff);
> +    i2c_send(bus, data >> 8);
> +    i2c_end_transfer(bus);
> +    return 0;
> +}
> +
> +int smbus_read_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
> +                     int len, bool recv_len, bool send_cmd)
> +{
> +    int rlen;
> +    int i;
> +
> +    if (send_cmd) {
> +        if (i2c_start_transfer(bus, addr, 0)) {
> +            return -1;
> +        }
> +        i2c_send(bus, command);
> +    }
> +    if (i2c_start_transfer(bus, addr, 1)) {
> +        if (send_cmd) {
> +            i2c_end_transfer(bus);
> +        }
> +        return -1;
> +    }
> +    if (recv_len) {
> +        rlen = i2c_recv(bus);
> +    } else {
> +        rlen = len;
> +    }
> +    if (rlen > len) {
> +        rlen = 0;
> +    }
> +    for (i = 0; i < rlen; i++) {
> +        data[i] = i2c_recv(bus);
> +    }
> +    i2c_nack(bus);
> +    i2c_end_transfer(bus);
> +    return rlen;
> +}
> +
> +int smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
> +                      int len, bool send_len)
> +{
> +    int i;
> +
> +    if (len > 32) {
> +        len = 32;
> +    }
> +
> +    if (i2c_start_transfer(bus, addr, 0)) {
> +        return -1;
> +    }
> +    i2c_send(bus, command);
> +    if (send_len) {
> +        i2c_send(bus, len);
> +    }
> +    for (i = 0; i < len; i++) {
> +        i2c_send(bus, data[i]);
> +    }
> +    i2c_end_transfer(bus);
> +    return 0;
> +}
> diff --git a/hw/i2c/smbus.c b/hw/i2c/smbus_slave.c
> similarity index 64%
> rename from hw/i2c/smbus.c
> rename to hw/i2c/smbus_slave.c
> index 6ff77c582f..1e734752d7 100644
> --- a/hw/i2c/smbus.c
> +++ b/hw/i2c/smbus_slave.c
> @@ -1,6 +1,10 @@
>  /*
>   * QEMU SMBus device emulation.
>   *
> + * This code is a helper for SMBus device emulation.  It implements an
> + * I2C device inteface and runs the SMBus protocol from the device
> + * point of view and maps those to simple calls to emulate.
> + *
>   * Copyright (c) 2007 CodeSourcery.
>   * Written by Paul Brook
>   *
> @@ -12,7 +16,7 @@
>  #include "qemu/osdep.h"
>  #include "hw/hw.h"
>  #include "hw/i2c/i2c.h"
> -#include "hw/i2c/smbus.h"
> +#include "hw/i2c/smbus_slave.h"
>  
>  //#define DEBUG_SMBUS 1
>  
> @@ -202,153 +206,6 @@ static int smbus_i2c_send(I2CSlave *s, uint8_t data)
>      return 0;
>  }
>  
> -/* Master device commands.  */
> -int smbus_quick_command(I2CBus *bus, uint8_t addr, int read)
> -{
> -    if (i2c_start_transfer(bus, addr, read)) {
> -        return -1;
> -    }
> -    i2c_end_transfer(bus);
> -    return 0;
> -}
> -
> -int smbus_receive_byte(I2CBus *bus, uint8_t addr)
> -{
> -    uint8_t data;
> -
> -    if (i2c_start_transfer(bus, addr, 1)) {
> -        return -1;
> -    }
> -    data = i2c_recv(bus);
> -    i2c_nack(bus);
> -    i2c_end_transfer(bus);
> -    return data;
> -}
> -
> -int smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data)
> -{
> -    if (i2c_start_transfer(bus, addr, 0)) {
> -        return -1;
> -    }
> -    i2c_send(bus, data);
> -    i2c_end_transfer(bus);
> -    return 0;
> -}
> -
> -int smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command)
> -{
> -    uint8_t data;
> -    if (i2c_start_transfer(bus, addr, 0)) {
> -        return -1;
> -    }
> -    i2c_send(bus, command);
> -    if (i2c_start_transfer(bus, addr, 1)) {
> -        i2c_end_transfer(bus);
> -        return -1;
> -    }
> -    data = i2c_recv(bus);
> -    i2c_nack(bus);
> -    i2c_end_transfer(bus);
> -    return data;
> -}
> -
> -int smbus_write_byte(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t data)
> -{
> -    if (i2c_start_transfer(bus, addr, 0)) {
> -        return -1;
> -    }
> -    i2c_send(bus, command);
> -    i2c_send(bus, data);
> -    i2c_end_transfer(bus);
> -    return 0;
> -}
> -
> -int smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command)
> -{
> -    uint16_t data;
> -    if (i2c_start_transfer(bus, addr, 0)) {
> -        return -1;
> -    }
> -    i2c_send(bus, command);
> -    if (i2c_start_transfer(bus, addr, 1)) {
> -        i2c_end_transfer(bus);
> -        return -1;
> -    }
> -    data = i2c_recv(bus);
> -    data |= i2c_recv(bus) << 8;
> -    i2c_nack(bus);
> -    i2c_end_transfer(bus);
> -    return data;
> -}
> -
> -int smbus_write_word(I2CBus *bus, uint8_t addr, uint8_t command, uint16_t data)
> -{
> -    if (i2c_start_transfer(bus, addr, 0)) {
> -        return -1;
> -    }
> -    i2c_send(bus, command);
> -    i2c_send(bus, data & 0xff);
> -    i2c_send(bus, data >> 8);
> -    i2c_end_transfer(bus);
> -    return 0;
> -}
> -
> -int smbus_read_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
> -                     int len, bool recv_len, bool send_cmd)
> -{
> -    int rlen;
> -    int i;
> -
> -    if (send_cmd) {
> -        if (i2c_start_transfer(bus, addr, 0)) {
> -            return -1;
> -        }
> -        i2c_send(bus, command);
> -    }
> -    if (i2c_start_transfer(bus, addr, 1)) {
> -        if (send_cmd) {
> -            i2c_end_transfer(bus);
> -        }
> -        return -1;
> -    }
> -    if (recv_len) {
> -        rlen = i2c_recv(bus);
> -    } else {
> -        rlen = len;
> -    }
> -    if (rlen > len) {
> -        rlen = 0;
> -    }
> -    for (i = 0; i < rlen; i++) {
> -        data[i] = i2c_recv(bus);
> -    }
> -    i2c_nack(bus);
> -    i2c_end_transfer(bus);
> -    return rlen;
> -}
> -
> -int smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
> -                      int len, bool send_len)
> -{
> -    int i;
> -
> -    if (len > 32)
> -        len = 32;
> -
> -    if (i2c_start_transfer(bus, addr, 0)) {
> -        return -1;
> -    }
> -    i2c_send(bus, command);
> -    if (send_len) {
> -        i2c_send(bus, len);
> -    }
> -    for (i = 0; i < len; i++) {
> -        i2c_send(bus, data[i]);
> -    }
> -    i2c_end_transfer(bus);
> -    return 0;
> -}
> -
>  static void smbus_device_class_init(ObjectClass *klass, void *data)
>  {
>      I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index dc09466b3e..cb28227cc3 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -42,7 +42,7 @@
>  #include "sysemu/sysemu.h"
>  #include "hw/sysbus.h"
>  #include "sysemu/arch_init.h"
> -#include "hw/i2c/smbus.h"
> +#include "hw/i2c/smbus_eeprom.h"
>  #include "hw/xen/xen.h"
>  #include "exec/memory.h"
>  #include "exec/address-spaces.h"
> diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
> index 532241e3f8..90e88c9b28 100644
> --- a/hw/i386/pc_q35.c
> +++ b/hw/i386/pc_q35.c
> @@ -33,7 +33,7 @@
>  #include "hw/hw.h"
>  #include "hw/loader.h"
>  #include "sysemu/arch_init.h"
> -#include "hw/i2c/smbus.h"
> +#include "hw/i2c/smbus_eeprom.h"
>  #include "hw/boards.h"
>  #include "hw/timer/mc146818rtc.h"
>  #include "hw/xen/xen.h"
> diff --git a/hw/isa/vt82c686.c b/hw/isa/vt82c686.c
> index 7302f6d74b..85d0532dd5 100644
> --- a/hw/isa/vt82c686.c
> +++ b/hw/isa/vt82c686.c
> @@ -14,7 +14,6 @@
>  #include "hw/hw.h"
>  #include "hw/isa/vt82c686.h"
>  #include "hw/i2c/i2c.h"
> -#include "hw/i2c/smbus.h"
>  #include "hw/pci/pci.h"
>  #include "hw/isa/isa.h"
>  #include "hw/isa/superio.h"
> diff --git a/hw/mips/mips_fulong2e.c b/hw/mips/mips_fulong2e.c
> index 2fbba32c48..dae8acc108 100644
> --- a/hw/mips/mips_fulong2e.c
> +++ b/hw/mips/mips_fulong2e.c
> @@ -27,7 +27,7 @@
>  #include "hw/isa/superio.h"
>  #include "net/net.h"
>  #include "hw/boards.h"
> -#include "hw/i2c/smbus.h"
> +#include "hw/i2c/smbus_eeprom.h"
>  #include "hw/block/flash.h"
>  #include "hw/mips/mips.h"
>  #include "hw/mips/cpudevs.h"
> diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
> index c1cf0fe12e..1fb7170f5e 100644
> --- a/hw/mips/mips_malta.c
> +++ b/hw/mips/mips_malta.c
> @@ -33,7 +33,7 @@
>  #include "hw/char/serial.h"
>  #include "net/net.h"
>  #include "hw/boards.h"
> -#include "hw/i2c/smbus.h"
> +#include "hw/i2c/smbus_eeprom.h"
>  #include "hw/block/flash.h"
>  #include "hw/mips/mips.h"
>  #include "hw/mips/cpudevs.h"
> diff --git a/hw/ppc/sam460ex.c b/hw/ppc/sam460ex.c
> index 5aac58f36e..7136b23f91 100644
> --- a/hw/ppc/sam460ex.c
> +++ b/hw/ppc/sam460ex.c
> @@ -34,7 +34,7 @@
>  #include "hw/sysbus.h"
>  #include "hw/char/serial.h"
>  #include "hw/i2c/ppc4xx_i2c.h"
> -#include "hw/i2c/smbus.h"
> +#include "hw/i2c/smbus_eeprom.h"
>  #include "hw/usb/hcd-ehci.h"
>  #include "hw/ppc/fdt.h"
>  
> diff --git a/include/hw/i2c/pm_smbus.h b/include/hw/i2c/pm_smbus.h
> index 060d3c6ac0..6dd5b7040b 100644
> --- a/include/hw/i2c/pm_smbus.h
> +++ b/include/hw/i2c/pm_smbus.h
> @@ -1,6 +1,8 @@
>  #ifndef PM_SMBUS_H
>  #define PM_SMBUS_H
>  
> +#include "hw/i2c/smbus_master.h"
> +
>  #define PM_SMBUS_MAX_MSG_SIZE 32
>  
>  typedef struct PMSMBus {
> diff --git a/include/hw/i2c/smbus_eeprom.h b/include/hw/i2c/smbus_eeprom.h
> new file mode 100644
> index 0000000000..46fb1a37d6
> --- /dev/null
> +++ b/include/hw/i2c/smbus_eeprom.h
> @@ -0,0 +1,32 @@
> +/*
> + * QEMU SMBus EEPROM API
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a copy
> + * of this software and associated documentation files (the "Software"), to deal
> + * in the Software without restriction, including without limitation the rights
> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> + * copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
> + * THE SOFTWARE.
> + */
> +
> +#ifndef HW_SMBUS_EEPROM_H
> +#define HW_SMBUS_EEPROM_H
> +
> +#include "hw/i2c/i2c.h"
> +
> +void smbus_eeprom_init_one(I2CBus *bus, uint8_t address, uint8_t *eeprom_buf);
> +void smbus_eeprom_init(I2CBus *bus, int nb_eeprom,
> +                       const uint8_t *eeprom_spd, int size);
> +
> +#endif
> diff --git a/include/hw/i2c/smbus_master.h b/include/hw/i2c/smbus_master.h
> new file mode 100644
> index 0000000000..bb13bc423c
> --- /dev/null
> +++ b/include/hw/i2c/smbus_master.h
> @@ -0,0 +1,55 @@
> +/*
> + * QEMU SMBus host (master) API
> + *
> + * Copyright (c) 2007 Arastra, Inc.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a copy
> + * of this software and associated documentation files (the "Software"), to deal
> + * in the Software without restriction, including without limitation the rights
> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> + * copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
> + * THE SOFTWARE.
> + */
> +
> +#ifndef HW_SMBUS_MASTER_H
> +#define HW_SMBUS_MASTER_H
> +
> +#include "hw/i2c/i2c.h"
> +
> +/* Master device commands.  */
> +int smbus_quick_command(I2CBus *bus, uint8_t addr, int read);
> +int smbus_receive_byte(I2CBus *bus, uint8_t addr);
> +int smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data);
> +int smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command);
> +int smbus_write_byte(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t data);
> +int smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command);
> +int smbus_write_word(I2CBus *bus, uint8_t addr, uint8_t command, uint16_t data);
> +
> +/*
> + * Do a block transfer from an I2C device.  If recv_len is set, then the
> + * first received byte is a length field and is used to know how much data
> + * to receive.  Otherwise receive "len" bytes.  If send_cmd is set, send
> + * the command byte first before receiving the data.
> + */
> +int smbus_read_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
> +                     int len, bool recv_len, bool send_cmd);
> +
> +/*
> + * Do a block transfer to an I2C device.  If send_len is set, send the
> + * "len" value before the data.
> + */
> +int smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
> +                      int len, bool send_len);
> +
> +#endif
> diff --git a/include/hw/i2c/smbus.h b/include/hw/i2c/smbus_slave.h
> similarity index 65%
> rename from include/hw/i2c/smbus.h
> rename to include/hw/i2c/smbus_slave.h
> index d8b1b9ee81..ff07ee005d 100644
> --- a/include/hw/i2c/smbus.h
> +++ b/include/hw/i2c/smbus_slave.h
> @@ -1,8 +1,5 @@
> -#ifndef QEMU_SMBUS_H
> -#define QEMU_SMBUS_H
> -
>  /*
> - * QEMU SMBus API
> + * QEMU SMBus device (slave) API
>   *
>   * Copyright (c) 2007 Arastra, Inc.
>   *
> @@ -25,6 +22,9 @@
>   * THE SOFTWARE.
>   */
>  
> +#ifndef HW_SMBUS_SLAVE_H
> +#define HW_SMBUS_SLAVE_H
> +
>  #include "hw/i2c/i2c.h"
>  
>  #define TYPE_SMBUS_DEVICE "smbus-device"
> @@ -64,33 +64,4 @@ struct SMBusDevice {
>      uint8_t command;
>  };
>  
> -/* Master device commands.  */
> -int smbus_quick_command(I2CBus *bus, uint8_t addr, int read);
> -int smbus_receive_byte(I2CBus *bus, uint8_t addr);
> -int smbus_send_byte(I2CBus *bus, uint8_t addr, uint8_t data);
> -int smbus_read_byte(I2CBus *bus, uint8_t addr, uint8_t command);
> -int smbus_write_byte(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t data);
> -int smbus_read_word(I2CBus *bus, uint8_t addr, uint8_t command);
> -int smbus_write_word(I2CBus *bus, uint8_t addr, uint8_t command, uint16_t data);
> -
> -/*
> - * Do a block transfer from an I2C device.  If recv_len is set, then the
> - * first received byte is a length field and is used to know how much data
> - * to receive.  Otherwise receive "len" bytes.  If send_cmd is set, send
> - * the command byte first before receiving the data.
> - */
> -int smbus_read_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
> -                     int len, bool recv_len, bool send_cmd);
> -
> -/*
> - * Do a block transfer to an I2C device.  If send_len is set, send the
> - * "len" value before the data.
> - */
> -int smbus_write_block(I2CBus *bus, uint8_t addr, uint8_t command, uint8_t *data,
> -                      int len, bool send_len);
> -
> -void smbus_eeprom_init_one(I2CBus *smbus, uint8_t address, uint8_t *eeprom_buf);
> -void smbus_eeprom_init(I2CBus *smbus, int nb_eeprom,
> -                       const uint8_t *eeprom_spd, int size);
> -
>  #endif
> 

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>