mirror of https://github.com/xemu-project/xemu.git
118 lines
2.9 KiB
C
118 lines
2.9 KiB
C
/*
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* QEMU SMBus Conexant CX25871 Video Encoder
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*
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* Copyright (c) 2012 espes
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 or
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* (at your option) version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hw/hw.h"
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#include "hw/i2c/i2c.h"
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#include "hw/i2c/smbus.h"
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typedef struct SMBusCX25871Device {
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SMBusDevice smbusdev;
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uint8_t registers[256];
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} SMBusCX25871Device;
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//#define DEBUG
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static void cx_quick_cmd(SMBusDevice *dev, uint8_t read)
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{
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#ifdef DEBUG
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printf("cx_quick_cmd: addr=0x%02x read=%d\n", dev->i2c.address, read);
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#endif
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}
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static void cx_send_byte(SMBusDevice *dev, uint8_t val)
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{
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#ifdef DEBUG
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printf("cx_send_byte: addr=0x%02x val=0x%02x\n",
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dev->i2c.address, val);
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#endif
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}
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static uint8_t cx_receive_byte(SMBusDevice *dev)
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{
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#ifdef DEBUG
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printf("cx_receive_byte: addr=0x%02x\n",
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dev->i2c.address);
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#endif
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return 0;
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}
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static void cx_write_data(SMBusDevice *dev, uint8_t cmd, uint8_t *buf, int len)
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{
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SMBusCX25871Device *cx = (SMBusCX25871Device *) dev;
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#ifdef DEBUG
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printf("cx_write_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n",
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dev->i2c.address, cmd, buf[0]);
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#endif
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memcpy(cx->registers+cmd, buf, MIN(len, 256-cmd));
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}
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static uint8_t cx_read_data(SMBusDevice *dev, uint8_t cmd, int n)
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{
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SMBusCX25871Device *cx = (SMBusCX25871Device *) dev;
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#ifdef DEBUG
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printf("cx_read_data: addr=0x%02x cmd=0x%02x n=%d\n",
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dev->i2c.address, cmd, n);
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#endif
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return cx->registers[cmd];
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}
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static int smbus_cx_init(SMBusDevice *dev)
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{
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return 0;
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}
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static void smbus_cx25871_class_initfn(ObjectClass *klass, void *data)
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{
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SMBusDeviceClass *sc = SMBUS_DEVICE_CLASS(klass);
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sc->init = smbus_cx_init;
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sc->quick_cmd = cx_quick_cmd;
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sc->send_byte = cx_send_byte;
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sc->receive_byte = cx_receive_byte;
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sc->write_data = cx_write_data;
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sc->read_data = cx_read_data;
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}
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static TypeInfo smbus_cx25871_info = {
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.name = "smbus-cx25871",
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.parent = TYPE_SMBUS_DEVICE,
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.instance_size = sizeof(SMBusCX25871Device),
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.class_init = smbus_cx25871_class_initfn,
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};
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static void smbus_cx25871_register_devices(void)
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{
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type_register_static(&smbus_cx25871_info);
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}
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type_init(smbus_cx25871_register_devices)
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void smbus_cx25871_init(i2c_bus *smbus, int address)
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{
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DeviceState *cx;
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cx = qdev_create((BusState *)smbus, "smbus-cx25871");
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qdev_prop_set_uint8(cx, "address", address);
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qdev_init_nofail(cx);
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}
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