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-rw-r--r--hw/smbus.c335
1 files changed, 0 insertions, 335 deletions
diff --git a/hw/smbus.c b/hw/smbus.c
deleted file mode 100644
index 9626415bca..0000000000
--- a/hw/smbus.c
+++ /dev/null
@@ -1,335 +0,0 @@
-/*
- * QEMU SMBus device emulation.
- *
- * Copyright (c) 2007 CodeSourcery.
- * Written by Paul Brook
- *
- * This code is licensed under the LGPL.
- */
-
-/* TODO: Implement PEC. */
-
-#include "hw/hw.h"
-#include "hw/i2c.h"
-#include "hw/smbus.h"
-
-//#define DEBUG_SMBUS 1
-
-#ifdef DEBUG_SMBUS
-#define DPRINTF(fmt, ...) \
-do { printf("smbus(%02x): " fmt , dev->i2c.address, ## __VA_ARGS__); } while (0)
-#define BADF(fmt, ...) \
-do { fprintf(stderr, "smbus: error: " fmt , ## __VA_ARGS__); exit(1);} while (0)
-#else
-#define DPRINTF(fmt, ...) do {} while(0)
-#define BADF(fmt, ...) \
-do { fprintf(stderr, "smbus: error: " fmt , ## __VA_ARGS__);} while (0)
-#endif
-
-enum {
- SMBUS_IDLE,
- SMBUS_WRITE_DATA,
- SMBUS_RECV_BYTE,
- SMBUS_READ_DATA,
- SMBUS_DONE,
- SMBUS_CONFUSED = -1
-};
-
-static void smbus_do_quick_cmd(SMBusDevice *dev, int recv)
-{
- SMBusDeviceClass *sc = SMBUS_DEVICE_GET_CLASS(dev);
-
- DPRINTF("Quick Command %d\n", recv);
- if (sc->quick_cmd) {
- sc->quick_cmd(dev, recv);
- }
-}
-
-static void smbus_do_write(SMBusDevice *dev)
-{
- SMBusDeviceClass *sc = SMBUS_DEVICE_GET_CLASS(dev);
-
- if (dev->data_len == 0) {
- smbus_do_quick_cmd(dev, 0);
- } else if (dev->data_len == 1) {
- DPRINTF("Send Byte\n");
- if (sc->send_byte) {
- sc->send_byte(dev, dev->data_buf[0]);
- }
- } else {
- dev->command = dev->data_buf[0];
- DPRINTF("Command %d len %d\n", dev->command, dev->data_len - 1);
- if (sc->write_data) {
- sc->write_data(dev, dev->command, dev->data_buf + 1,
- dev->data_len - 1);
- }
- }
-}
-
-static void smbus_i2c_event(I2CSlave *s, enum i2c_event event)
-{
- SMBusDevice *dev = SMBUS_DEVICE(s);
-
- switch (event) {
- case I2C_START_SEND:
- switch (dev->mode) {
- case SMBUS_IDLE:
- DPRINTF("Incoming data\n");
- dev->mode = SMBUS_WRITE_DATA;
- break;
- default:
- BADF("Unexpected send start condition in state %d\n", dev->mode);
- dev->mode = SMBUS_CONFUSED;
- break;
- }
- break;
-
- case I2C_START_RECV:
- switch (dev->mode) {
- case SMBUS_IDLE:
- DPRINTF("Read mode\n");
- dev->mode = SMBUS_RECV_BYTE;
- break;
- case SMBUS_WRITE_DATA:
- if (dev->data_len == 0) {
- BADF("Read after write with no data\n");
- dev->mode = SMBUS_CONFUSED;
- } else {
- if (dev->data_len > 1) {
- smbus_do_write(dev);
- } else {
- dev->command = dev->data_buf[0];
- DPRINTF("%02x: Command %d\n", dev->i2c.address,
- dev->command);
- }
- DPRINTF("Read mode\n");
- dev->data_len = 0;
- dev->mode = SMBUS_READ_DATA;
- }
- break;
- default:
- BADF("Unexpected recv start condition in state %d\n", dev->mode);
- dev->mode = SMBUS_CONFUSED;
- break;
- }
- break;
-
- case I2C_FINISH:
- switch (dev->mode) {
- case SMBUS_WRITE_DATA:
- smbus_do_write(dev);
- break;
- case SMBUS_RECV_BYTE:
- smbus_do_quick_cmd(dev, 1);
- break;
- case SMBUS_READ_DATA:
- BADF("Unexpected stop during receive\n");
- break;
- default:
- /* Nothing to do. */
- break;
- }
- dev->mode = SMBUS_IDLE;
- dev->data_len = 0;
- break;
-
- case I2C_NACK:
- switch (dev->mode) {
- case SMBUS_DONE:
- /* Nothing to do. */
- break;
- case SMBUS_READ_DATA:
- dev->mode = SMBUS_DONE;
- break;
- default:
- BADF("Unexpected NACK in state %d\n", dev->mode);
- dev->mode = SMBUS_CONFUSED;
- break;
- }
- }
-}
-
-static int smbus_i2c_recv(I2CSlave *s)
-{
- SMBusDevice *dev = SMBUS_DEVICE(s);
- SMBusDeviceClass *sc = SMBUS_DEVICE_GET_CLASS(dev);
- int ret;
-
- switch (dev->mode) {
- case SMBUS_RECV_BYTE:
- if (sc->receive_byte) {
- ret = sc->receive_byte(dev);
- } else {
- ret = 0;
- }
- DPRINTF("Receive Byte %02x\n", ret);
- dev->mode = SMBUS_DONE;
- break;
- case SMBUS_READ_DATA:
- if (sc->read_data) {
- ret = sc->read_data(dev, dev->command, dev->data_len);
- dev->data_len++;
- } else {
- ret = 0;
- }
- DPRINTF("Read data %02x\n", ret);
- break;
- default:
- BADF("Unexpected read in state %d\n", dev->mode);
- dev->mode = SMBUS_CONFUSED;
- ret = 0;
- break;
- }
- return ret;
-}
-
-static int smbus_i2c_send(I2CSlave *s, uint8_t data)
-{
- SMBusDevice *dev = SMBUS_DEVICE(s);
-
- switch (dev->mode) {
- case SMBUS_WRITE_DATA:
- DPRINTF("Write data %02x\n", data);
- dev->data_buf[dev->data_len++] = data;
- break;
- default:
- BADF("Unexpected write in state %d\n", dev->mode);
- break;
- }
- return 0;
-}
-
-static int smbus_device_init(I2CSlave *i2c)
-{
- SMBusDevice *dev = SMBUS_DEVICE(i2c);
- SMBusDeviceClass *sc = SMBUS_DEVICE_GET_CLASS(dev);
-
- return sc->init(dev);
-}
-
-/* Master device commands. */
-void smbus_quick_command(i2c_bus *bus, uint8_t addr, int read)
-{
- i2c_start_transfer(bus, addr, read);
- i2c_end_transfer(bus);
-}
-
-uint8_t smbus_receive_byte(i2c_bus *bus, uint8_t addr)
-{
- uint8_t data;
-
- i2c_start_transfer(bus, addr, 1);
- data = i2c_recv(bus);
- i2c_nack(bus);
- i2c_end_transfer(bus);
- return data;
-}
-
-void smbus_send_byte(i2c_bus *bus, uint8_t addr, uint8_t data)
-{
- i2c_start_transfer(bus, addr, 0);
- i2c_send(bus, data);
- i2c_end_transfer(bus);
-}
-
-uint8_t smbus_read_byte(i2c_bus *bus, uint8_t addr, uint8_t command)
-{
- uint8_t data;
- i2c_start_transfer(bus, addr, 0);
- i2c_send(bus, command);
- i2c_start_transfer(bus, addr, 1);
- data = i2c_recv(bus);
- i2c_nack(bus);
- i2c_end_transfer(bus);
- return data;
-}
-
-void smbus_write_byte(i2c_bus *bus, uint8_t addr, uint8_t command, uint8_t data)
-{
- i2c_start_transfer(bus, addr, 0);
- i2c_send(bus, command);
- i2c_send(bus, data);
- i2c_end_transfer(bus);
-}
-
-uint16_t smbus_read_word(i2c_bus *bus, uint8_t addr, uint8_t command)
-{
- uint16_t data;
- i2c_start_transfer(bus, addr, 0);
- i2c_send(bus, command);
- i2c_start_transfer(bus, addr, 1);
- data = i2c_recv(bus);
- data |= i2c_recv(bus) << 8;
- i2c_nack(bus);
- i2c_end_transfer(bus);
- return data;
-}
-
-void smbus_write_word(i2c_bus *bus, uint8_t addr, uint8_t command, uint16_t data)
-{
- i2c_start_transfer(bus, addr, 0);
- i2c_send(bus, command);
- i2c_send(bus, data & 0xff);
- i2c_send(bus, data >> 8);
- i2c_end_transfer(bus);
-}
-
-int smbus_read_block(i2c_bus *bus, uint8_t addr, uint8_t command, uint8_t *data)
-{
- int len;
- int i;
-
- i2c_start_transfer(bus, addr, 0);
- i2c_send(bus, command);
- i2c_start_transfer(bus, addr, 1);
- len = i2c_recv(bus);
- if (len > 32)
- len = 0;
- for (i = 0; i < len; i++)
- data[i] = i2c_recv(bus);
- i2c_nack(bus);
- i2c_end_transfer(bus);
- return len;
-}
-
-void smbus_write_block(i2c_bus *bus, uint8_t addr, uint8_t command, uint8_t *data,
- int len)
-{
- int i;
-
- if (len > 32)
- len = 32;
-
- i2c_start_transfer(bus, addr, 0);
- i2c_send(bus, command);
- i2c_send(bus, len);
- for (i = 0; i < len; i++)
- i2c_send(bus, data[i]);
- i2c_end_transfer(bus);
-}
-
-static void smbus_device_class_init(ObjectClass *klass, void *data)
-{
- I2CSlaveClass *sc = I2C_SLAVE_CLASS(klass);
-
- sc->init = smbus_device_init;
- sc->event = smbus_i2c_event;
- sc->recv = smbus_i2c_recv;
- sc->send = smbus_i2c_send;
-}
-
-static const TypeInfo smbus_device_type_info = {
- .name = TYPE_SMBUS_DEVICE,
- .parent = TYPE_I2C_SLAVE,
- .instance_size = sizeof(SMBusDevice),
- .abstract = true,
- .class_size = sizeof(SMBusDeviceClass),
- .class_init = smbus_device_class_init,
-};
-
-static void smbus_device_register_types(void)
-{
- type_register_static(&smbus_device_type_info);
-}
-
-type_init(smbus_device_register_types)
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