6  * SPDX-License-Identifier: GPL-2.0-or-later
13 #include "hw/qdev-properties.h"
41     uint8_t config = s->regs[PCA9554_CONFIG];  in pca9554_update_pin_input()
42     uint8_t output = s->regs[PCA9554_OUTPUT];  in pca9554_update_pin_input()
48         uint8_t old_value = s->regs[PCA9554_INPUT] & bit_mask;  in pca9554_update_pin_input()
53             s->regs[PCA9554_INPUT] &= ~bit_mask;  in pca9554_update_pin_input()
60             if (s->ext_state[i] == PCA9554_PIN_LOW) {  in pca9554_update_pin_input()
61                 s->regs[PCA9554_INPUT] &= ~bit_mask;  in pca9554_update_pin_input()
63                 s->regs[PCA9554_INPUT] |=  bit_mask;  in pca9554_update_pin_input()
66         default:  in pca9554_update_pin_input()
70         /* update irq state only if pin state changed */  in pca9554_update_pin_input()
71         new_value = s->regs[PCA9554_INPUT] & bit_mask;  in pca9554_update_pin_input()
75                 qemu_set_irq(s->gpio_out[i], 1);  in pca9554_update_pin_input()
78                 qemu_set_irq(s->gpio_out[i], 0);  in pca9554_update_pin_input()
88         return s->regs[PCA9554_INPUT] ^ s->regs[PCA9554_POLARITY];  in pca9554_read()
92         return s->regs[reg];  in pca9554_read()
93     default:  in pca9554_read()
105         s->regs[reg] = data;  in pca9554_write()
109         s->regs[reg] = data;  in pca9554_write()
112     default:  in pca9554_write()
122     return pca9554_read(s, s->pointer & 0x3);  in pca9554_recv()
130     if (s->len == 0) {  in pca9554_send()
131         s->pointer = data;  in pca9554_send()
132         s->len++;  in pca9554_send()
134         pca9554_write(s, s->pointer & 0x3, data);  in pca9554_send()
144     s->len = 0;  in pca9554_event()
153     uint8_t state;  in pca9554_get_pin()  local
165     state = pca9554_read(s, PCA9554_CONFIG);  in pca9554_get_pin()
166     state |= pca9554_read(s, PCA9554_OUTPUT);  in pca9554_get_pin()
167     state = (state >> pin) & 0x1;  in pca9554_get_pin()
168     visit_type_str(v, name, (char **)&pin_state[state], errp);  in pca9554_get_pin()
176     uint8_t state, mask;  in pca9554_set_pin()  local
192     for (state = 0; state < ARRAY_SIZE(pin_state); state++) {  in pca9554_set_pin()
193         if (!strcmp(state_str, pin_state[state])) {  in pca9554_set_pin()
197     if (state >= ARRAY_SIZE(pin_state)) {  in pca9554_set_pin()
198         error_setg(errp, "%s invalid pin state %s", __func__, state_str);  in pca9554_set_pin()
205     if (state == PCA9554_PIN_LOW) {  in pca9554_set_pin()
236     s->regs[PCA9554_INPUT] = 0xFF;  in pca9554_reset()
237     s->regs[PCA9554_OUTPUT] = 0xFF;  in pca9554_reset()
238     s->regs[PCA9554_POLARITY] = 0x0; /* No pins are inverted */  in pca9554_reset()
239     s->regs[PCA9554_CONFIG] = 0xFF; /* All pins are inputs */  in pca9554_reset()
241     memset(s->ext_state, PCA9554_PIN_HIZ, PCA9554_PIN_COUNT);  in pca9554_reset()
244     s->pointer = 0x0;  in pca9554_reset()
245     s->len = 0;  in pca9554_reset()
264     if (s->ext_state[pin] != level) {  in pca9554_set_ext_state()
265         s->ext_state[pin] = level;  in pca9554_set_ext_state()
283     if (!s->description) {  in pca9554_realize()
284         s->description = g_strdup("pca9554");  in pca9554_realize()
287     qdev_init_gpio_out(dev, s->gpio_out, PCA9554_PIN_COUNT);  in pca9554_realize()
300     k->event = pca9554_event;  in pca9554_class_init()
301     k->recv = pca9554_recv;  in pca9554_class_init()
302     k->send = pca9554_send;  in pca9554_class_init()
303     dc->realize = pca9554_realize;  in pca9554_class_init()
305     dc->vmsd = &pca9554_vmstate;  in pca9554_class_init()