This was done in a mostly automated fashion. I did it in three steps and then rebased it into a single step which avoids repeatedly touching every file in the tree. The first step was a sed-based addition of the parent type to the subclass registration functions. The second step was another sed-based removal of subclass registration functions while also adding virtual functions from the base class into a class_init function as appropriate. Finally, a python script was used to convert the DeviceInfo structures and qdev_register_subclass functions to TypeInfo structures, class_init functions, and type_register_static calls. We are almost fully converted to QOM after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
214 lines
4.9 KiB
C
214 lines
4.9 KiB
C
/*
|
|
* MAX7310 8-port GPIO expansion chip.
|
|
*
|
|
* Copyright (c) 2006 Openedhand Ltd.
|
|
* Written by Andrzej Zaborowski <balrog@zabor.org>
|
|
*
|
|
* This file is licensed under GNU GPL.
|
|
*/
|
|
|
|
#include "i2c.h"
|
|
|
|
typedef struct {
|
|
I2CSlave i2c;
|
|
int i2c_command_byte;
|
|
int len;
|
|
|
|
uint8_t level;
|
|
uint8_t direction;
|
|
uint8_t polarity;
|
|
uint8_t status;
|
|
uint8_t command;
|
|
qemu_irq handler[8];
|
|
qemu_irq *gpio_in;
|
|
} MAX7310State;
|
|
|
|
static void max7310_reset(DeviceState *dev)
|
|
{
|
|
MAX7310State *s = FROM_I2C_SLAVE(MAX7310State, I2C_SLAVE_FROM_QDEV(dev));
|
|
s->level &= s->direction;
|
|
s->direction = 0xff;
|
|
s->polarity = 0xf0;
|
|
s->status = 0x01;
|
|
s->command = 0x00;
|
|
}
|
|
|
|
static int max7310_rx(I2CSlave *i2c)
|
|
{
|
|
MAX7310State *s = (MAX7310State *) i2c;
|
|
|
|
switch (s->command) {
|
|
case 0x00: /* Input port */
|
|
return s->level ^ s->polarity;
|
|
break;
|
|
|
|
case 0x01: /* Output port */
|
|
return s->level & ~s->direction;
|
|
break;
|
|
|
|
case 0x02: /* Polarity inversion */
|
|
return s->polarity;
|
|
|
|
case 0x03: /* Configuration */
|
|
return s->direction;
|
|
|
|
case 0x04: /* Timeout */
|
|
return s->status;
|
|
break;
|
|
|
|
case 0xff: /* Reserved */
|
|
return 0xff;
|
|
|
|
default:
|
|
#ifdef VERBOSE
|
|
printf("%s: unknown register %02x\n", __FUNCTION__, s->command);
|
|
#endif
|
|
break;
|
|
}
|
|
return 0xff;
|
|
}
|
|
|
|
static int max7310_tx(I2CSlave *i2c, uint8_t data)
|
|
{
|
|
MAX7310State *s = (MAX7310State *) i2c;
|
|
uint8_t diff;
|
|
int line;
|
|
|
|
if (s->len ++ > 1) {
|
|
#ifdef VERBOSE
|
|
printf("%s: message too long (%i bytes)\n", __FUNCTION__, s->len);
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
if (s->i2c_command_byte) {
|
|
s->command = data;
|
|
s->i2c_command_byte = 0;
|
|
return 0;
|
|
}
|
|
|
|
switch (s->command) {
|
|
case 0x01: /* Output port */
|
|
for (diff = (data ^ s->level) & ~s->direction; diff;
|
|
diff &= ~(1 << line)) {
|
|
line = ffs(diff) - 1;
|
|
if (s->handler[line])
|
|
qemu_set_irq(s->handler[line], (data >> line) & 1);
|
|
}
|
|
s->level = (s->level & s->direction) | (data & ~s->direction);
|
|
break;
|
|
|
|
case 0x02: /* Polarity inversion */
|
|
s->polarity = data;
|
|
break;
|
|
|
|
case 0x03: /* Configuration */
|
|
s->level &= ~(s->direction ^ data);
|
|
s->direction = data;
|
|
break;
|
|
|
|
case 0x04: /* Timeout */
|
|
s->status = data;
|
|
break;
|
|
|
|
case 0x00: /* Input port - ignore writes */
|
|
break;
|
|
default:
|
|
#ifdef VERBOSE
|
|
printf("%s: unknown register %02x\n", __FUNCTION__, s->command);
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void max7310_event(I2CSlave *i2c, enum i2c_event event)
|
|
{
|
|
MAX7310State *s = (MAX7310State *) i2c;
|
|
s->len = 0;
|
|
|
|
switch (event) {
|
|
case I2C_START_SEND:
|
|
s->i2c_command_byte = 1;
|
|
break;
|
|
case I2C_FINISH:
|
|
#ifdef VERBOSE
|
|
if (s->len == 1)
|
|
printf("%s: message too short (%i bytes)\n", __FUNCTION__, s->len);
|
|
#endif
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static const VMStateDescription vmstate_max7310 = {
|
|
.name = "max7310",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.minimum_version_id_old = 0,
|
|
.fields = (VMStateField []) {
|
|
VMSTATE_INT32(i2c_command_byte, MAX7310State),
|
|
VMSTATE_INT32(len, MAX7310State),
|
|
VMSTATE_UINT8(level, MAX7310State),
|
|
VMSTATE_UINT8(direction, MAX7310State),
|
|
VMSTATE_UINT8(polarity, MAX7310State),
|
|
VMSTATE_UINT8(status, MAX7310State),
|
|
VMSTATE_UINT8(command, MAX7310State),
|
|
VMSTATE_I2C_SLAVE(i2c, MAX7310State),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static void max7310_gpio_set(void *opaque, int line, int level)
|
|
{
|
|
MAX7310State *s = (MAX7310State *) opaque;
|
|
if (line >= ARRAY_SIZE(s->handler) || line < 0)
|
|
hw_error("bad GPIO line");
|
|
|
|
if (level)
|
|
s->level |= s->direction & (1 << line);
|
|
else
|
|
s->level &= ~(s->direction & (1 << line));
|
|
}
|
|
|
|
/* MAX7310 is SMBus-compatible (can be used with only SMBus protocols),
|
|
* but also accepts sequences that are not SMBus so return an I2C device. */
|
|
static int max7310_init(I2CSlave *i2c)
|
|
{
|
|
MAX7310State *s = FROM_I2C_SLAVE(MAX7310State, i2c);
|
|
|
|
qdev_init_gpio_in(&i2c->qdev, max7310_gpio_set, 8);
|
|
qdev_init_gpio_out(&i2c->qdev, s->handler, 8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void max7310_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
|
|
|
|
k->init = max7310_init;
|
|
k->event = max7310_event;
|
|
k->recv = max7310_rx;
|
|
k->send = max7310_tx;
|
|
dc->reset = max7310_reset;
|
|
dc->vmsd = &vmstate_max7310;
|
|
}
|
|
|
|
static TypeInfo max7310_info = {
|
|
.name = "max7310",
|
|
.parent = TYPE_I2C_SLAVE,
|
|
.instance_size = sizeof(MAX7310State),
|
|
.class_init = max7310_class_init,
|
|
};
|
|
|
|
static void max7310_register_devices(void)
|
|
{
|
|
type_register_static(&max7310_info);
|
|
}
|
|
|
|
device_init(max7310_register_devices)
|