diff options
Diffstat (limited to 'hw/max7310.c')
| -rw-r--r-- | hw/max7310.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/hw/max7310.c b/hw/max7310.c deleted file mode 100644 index e5cb810a27..0000000000 --- a/hw/max7310.c +++ /dev/null @@ -1,213 +0,0 @@ -/* - * 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 "hw/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(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 const TypeInfo max7310_info = { - .name = "max7310", - .parent = TYPE_I2C_SLAVE, - .instance_size = sizeof(MAX7310State), - .class_init = max7310_class_init, -}; - -static void max7310_register_types(void) -{ - type_register_static(&max7310_info); -} - -type_init(max7310_register_types) |