summaryrefslogtreecommitdiffstats
path: root/include/hw/i2c/smbus.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/hw/i2c/smbus.h')
-rw-r--r--include/hw/i2c/smbus.h83
1 files changed, 83 insertions, 0 deletions
diff --git a/include/hw/i2c/smbus.h b/include/hw/i2c/smbus.h
new file mode 100644
index 0000000..d764d75
--- /dev/null
+++ b/include/hw/i2c/smbus.h
@@ -0,0 +1,83 @@
+#ifndef QEMU_SMBUS_H
+#define QEMU_SMBUS_H
+
+/*
+ * QEMU SMBus 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.
+ */
+
+#include "hw/i2c/i2c.h"
+
+#define TYPE_SMBUS_DEVICE "smbus-device"
+#define SMBUS_DEVICE(obj) \
+ OBJECT_CHECK(SMBusDevice, (obj), TYPE_SMBUS_DEVICE)
+#define SMBUS_DEVICE_CLASS(klass) \
+ OBJECT_CLASS_CHECK(SMBusDeviceClass, (klass), TYPE_SMBUS_DEVICE)
+#define SMBUS_DEVICE_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(SMBusDeviceClass, (obj), TYPE_SMBUS_DEVICE)
+
+typedef struct SMBusDeviceClass
+{
+ I2CSlaveClass parent_class;
+ int (*init)(SMBusDevice *dev);
+ void (*quick_cmd)(SMBusDevice *dev, uint8_t read);
+ void (*send_byte)(SMBusDevice *dev, uint8_t val);
+ uint8_t (*receive_byte)(SMBusDevice *dev);
+ /* We can't distinguish between a word write and a block write with
+ length 1, so pass the whole data block including the length byte
+ (if present). The device is responsible figuring out what type of
+ command this is. */
+ void (*write_data)(SMBusDevice *dev, uint8_t cmd, uint8_t *buf, int len);
+ /* Likewise we can't distinguish between different reads, or even know
+ the length of the read until the read is complete, so read data a
+ byte at a time. The device is responsible for adding the length
+ byte on block reads. */
+ uint8_t (*read_data)(SMBusDevice *dev, uint8_t cmd, int n);
+} SMBusDeviceClass;
+
+struct SMBusDevice {
+ /* The SMBus protocol is implemented on top of I2C. */
+ I2CSlave i2c;
+
+ /* Remaining fields for internal use only. */
+ int mode;
+ int data_len;
+ uint8_t data_buf[34]; /* command + len + 32 bytes of data. */
+ uint8_t command;
+};
+
+/* Master device commands. */
+void smbus_quick_command(i2c_bus *bus, uint8_t addr, int read);
+uint8_t smbus_receive_byte(i2c_bus *bus, uint8_t addr);
+void smbus_send_byte(i2c_bus *bus, uint8_t addr, uint8_t data);
+uint8_t smbus_read_byte(i2c_bus *bus, uint8_t addr, uint8_t command);
+void smbus_write_byte(i2c_bus *bus, uint8_t addr, uint8_t command, uint8_t data);
+uint16_t smbus_read_word(i2c_bus *bus, uint8_t addr, uint8_t command);
+void smbus_write_word(i2c_bus *bus, uint8_t addr, uint8_t command, uint16_t data);
+int smbus_read_block(i2c_bus *bus, uint8_t addr, uint8_t command, uint8_t *data);
+void smbus_write_block(i2c_bus *bus, uint8_t addr, uint8_t command, uint8_t *data,
+ int len);
+
+void smbus_eeprom_init(i2c_bus *smbus, int nb_eeprom,
+ const uint8_t *eeprom_spd, int size);
+
+#endif
OpenPOWER on IntegriCloud