2  * nRF51 System-on-Chip general purpose input/output register definition
7  * Copyright 2018 Steffen Görtz <contrib@steffen-goertz.de>
10  * the COPYING file in the top-level directory.
23  * given the current configuration and logic level.
24  * It is not differentiated between standard and "high"(-power) drive modes.
26 static bool is_connected(uint32_t config, uint32_t level)  in is_connected()  argument
36         state = level != 0;  in is_connected()
39         state = level == 0;  in is_connected()
56     return -1;  in pull_value()
60                               bool connected, bool level)  in update_output_irq()  argument
62     int64_t irq_level = connected ? level : -1;  in update_output_irq()
63     bool old_connected = extract32(s->old_out_connected, i, 1);  in update_output_irq()
64     bool old_level = extract32(s->old_out, i, 1);  in update_output_irq()
66     if ((old_connected != connected) || (old_level != level)) {  in update_output_irq()
67         qemu_set_irq(s->output[i], irq_level);  in update_output_irq()
71     s->old_out = deposit32(s->old_out, i, 1, level);  in update_output_irq()
72     s->old_out_connected = deposit32(s->old_out_connected, i, 1, connected);  in update_output_irq()
83         pull = pull_value(s->cnf[i]);  in update_state()
84         dir = extract32(s->cnf[i], 0, 1);  in update_state()
85         connected_in = extract32(s->in_mask, i, 1);  in update_state()
86         out = extract32(s->out, i, 1);  in update_state()
87         in = extract32(s->in, i, 1);  in update_state()
88         input = !extract32(s->cnf[i], 1, 1);  in update_state()
89         connected_out = is_connected(s->cnf[i], out) && dir;  in update_state()
94                 s->in = deposit32(s->in, i, 1, pull);  in update_state()
103                 uint32_t detect_config = extract32(s->cnf[i], 16, 2);  in update_state()
113                  * otherwise pull-up/pull-down resistors put a value on both  in update_state()
121                     s->in = deposit32(s->in, i, 1, out);  in update_state()
128     qemu_set_irq(s->detect, assert_detect);  in update_state()
140     uint32_t value = s->dir;  in reflect_dir_bit_in_cnf()
143         s->cnf[i] = (s->cnf[i] & ~(1UL)) | ((value >> i) & 0x01);  in reflect_dir_bit_in_cnf()
155         r = s->out;  in nrf51_gpio_read()
159         r = s->in;  in nrf51_gpio_read()
163         r = s->dir;  in nrf51_gpio_read()
167         idx = (offset - NRF51_GPIO_REG_CNF_START) / 4;  in nrf51_gpio_read()
168         r = s->cnf[idx];  in nrf51_gpio_read()
192         s->out = value;  in nrf51_gpio_write()
196         s->out |= value;  in nrf51_gpio_write()
200         s->out &= ~value;  in nrf51_gpio_write()
204         s->dir = value;  in nrf51_gpio_write()
209         s->dir |= value;  in nrf51_gpio_write()
214         s->dir &= ~value;  in nrf51_gpio_write()
219         idx = (offset - NRF51_GPIO_REG_CNF_START) / 4;  in nrf51_gpio_write()
220         s->cnf[idx] = value;  in nrf51_gpio_write()
225         s->dir = (s->dir & ~(1UL << idx)) | ((value & 0x01) << idx);  in nrf51_gpio_write()
253     s->in_mask = deposit32(s->in_mask, line, 1, value >= 0);  in nrf51_gpio_set()
255         s->in = deposit32(s->in, line, 1, value != 0);  in nrf51_gpio_set()
266     s->out = 0;  in nrf51_gpio_reset()
267     s->old_out = 0;  in nrf51_gpio_reset()
268     s->old_out_connected = 0;  in nrf51_gpio_reset()
269     s->in = 0;  in nrf51_gpio_reset()
270     s->in_mask = 0;  in nrf51_gpio_reset()
271     s->dir = 0;  in nrf51_gpio_reset()
274         s->cnf[i] = 0x00000002;  in nrf51_gpio_reset()
298     memory_region_init_io(&s->mmio, obj, &gpio_ops, s,  in nrf51_gpio_init()
300     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);  in nrf51_gpio_init()
303     qdev_init_gpio_out(DEVICE(s), s->output, NRF51_GPIO_PINS);  in nrf51_gpio_init()
304     qdev_init_gpio_out_named(DEVICE(s), &s->detect, "detect", 1);  in nrf51_gpio_init()
311     dc->vmsd = &vmstate_nrf51_gpio;  in nrf51_gpio_class_init()
313     dc->desc = "nRF51 GPIO";  in nrf51_gpio_class_init()