hw/sensor/dps310.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright 2017-2021 Joel Stanley <joel@jms.id.au>, IBM Corporation
7  * https://www.infineon.com/cms/en/product/sensor/pressure-sensors/pressure-sensors-for-iot/dps310/
17 #define NUM_REGISTERS   0x33
26     uint8_t len;  member
31 #define TYPE_DPS310 "dps310"
32 #define DPS310(obj) OBJECT_CHECK(DPS310State, (obj), TYPE_DPS310)
34 #define DPS310_PRS_B2           0x00
35 #define DPS310_PRS_B1           0x01
36 #define DPS310_PRS_B0           0x02
37 #define DPS310_TMP_B2           0x03
38 #define DPS310_TMP_B1           0x04
39 #define DPS310_TMP_B0           0x05
40 #define DPS310_PRS_CFG          0x06
41 #define DPS310_TMP_CFG          0x07
42 #define  DPS310_TMP_RATE_BITS   (0x70)
43 #define DPS310_MEAS_CFG         0x08
44 #define  DPS310_MEAS_CTRL_BITS  (0x07)
45 #define   DPS310_PRESSURE_EN    BIT(0)
46 #define   DPS310_TEMP_EN        BIT(1)
47 #define   DPS310_BACKGROUND     BIT(2)
48 #define  DPS310_PRS_RDY         BIT(4)
49 #define  DPS310_TMP_RDY         BIT(5)
50 #define  DPS310_SENSOR_RDY      BIT(6)
51 #define  DPS310_COEF_RDY        BIT(7)
52 #define DPS310_CFG_REG          0x09
53 #define DPS310_RESET            0x0c
54 #define  DPS310_RESET_MAGIC     (BIT(0) | BIT(3))
55 #define DPS310_COEF_BASE        0x10
56 #define DPS310_COEF_LAST        0x21
57 #define DPS310_COEF_SRC         0x28
63     static const uint8_t regs_reset_state[sizeof(s->regs)] = {  in dps310_reset()
71     memcpy(s->regs, regs_reset_state, sizeof(s->regs));  in dps310_reset()
72     s->pointer = 0;  in dps310_reset()
75     s->regs[DPS310_MEAS_CFG] = DPS310_COEF_RDY | DPS310_SENSOR_RDY  in dps310_reset()
81     if (reg >= sizeof(s->regs)) {  in dps310_read()
83                       __func__, s->pointer);  in dps310_read()
101         return s->regs[reg];  in dps310_read()
111     if (reg >= sizeof(s->regs)) {  in dps310_write()
113                       __func__, s->pointer);  in dps310_write()
127         s->regs[reg] = data;  in dps310_write()
140     if (s->len == 1) {  in dps310_rx()
141         return dps310_read(s, s->pointer++);  in dps310_rx()
151     if (s->len == 0) {  in dps310_tx()
153          * first byte is the register pointer for a read or write  in dps310_tx()
156         s->pointer = data;  in dps310_tx()
157         s->len++;  in dps310_tx()
158     } else if (s->len == 1) {  in dps310_tx()
159         dps310_write(s, s->pointer++, data);  in dps310_tx()
171         s->pointer = 0xFF;  in dps310_event()
172         s->len = 0;  in dps310_event()
175         if (s->len != 1) {  in dps310_event()
192         VMSTATE_UINT8(len, DPS310State),
205     k->event = dps310_event;  in dps310_class_init()
206     k->recv = dps310_rx;  in dps310_class_init()
207     k->send = dps310_tx;  in dps310_class_init()
209     dc->vmsd = &vmstate_dps310;  in dps310_class_init()