Merge tag 'pull-loongarch-20241016' of https://gitlab.com/gaosong/qemu into staging
[qemu/armbru.git] / hw / sensor / dps310.c
blob6966a53248b4ea7a3a003fa56edccc0c792fb94c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright 2017-2021 Joel Stanley <joel@jms.id.au>, IBM Corporation
5 * Infineon DPS310 temperature and humidity sensor
7 * https://www.infineon.com/cms/en/product/sensor/pressure-sensors/pressure-sensors-for-iot/dps310/
8 */
10 #include "qemu/osdep.h"
11 #include "qemu/log.h"
12 #include "hw/i2c/i2c.h"
13 #include "qapi/error.h"
14 #include "qapi/visitor.h"
15 #include "migration/vmstate.h"
17 #define NUM_REGISTERS 0x33
19 typedef struct DPS310State {
20 /*< private >*/
21 I2CSlave i2c;
23 /*< public >*/
24 uint8_t regs[NUM_REGISTERS];
26 uint8_t len;
27 uint8_t pointer;
29 } DPS310State;
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
59 static void dps310_reset(DeviceState *dev)
61 DPS310State *s = DPS310(dev);
63 static const uint8_t regs_reset_state[sizeof(s->regs)] = {
64 0xfe, 0x2f, 0xee, 0x02, 0x69, 0xa6, 0x00, 0x80, 0xc7, 0x00, 0x00, 0x00,
65 0x00, 0x10, 0x00, 0x00, 0x0e, 0x1e, 0xdd, 0x13, 0xca, 0x5f, 0x21, 0x52,
66 0xf9, 0xc6, 0x04, 0xd1, 0xdb, 0x47, 0x00, 0x5b, 0xfb, 0x3a, 0x00, 0x00,
67 0x20, 0x49, 0x4e, 0xa5, 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
68 0x60, 0x15, 0x02
71 memcpy(s->regs, regs_reset_state, sizeof(s->regs));
72 s->pointer = 0;
74 /* TODO: assert these after some timeout ? */
75 s->regs[DPS310_MEAS_CFG] = DPS310_COEF_RDY | DPS310_SENSOR_RDY
76 | DPS310_TMP_RDY | DPS310_PRS_RDY;
79 static uint8_t dps310_read(DPS310State *s, uint8_t reg)
81 if (reg >= sizeof(s->regs)) {
82 qemu_log_mask(LOG_GUEST_ERROR, "%s: register 0x%02x out of bounds\n",
83 __func__, s->pointer);
84 return 0xFF;
87 switch (reg) {
88 case DPS310_PRS_B2:
89 case DPS310_PRS_B1:
90 case DPS310_PRS_B0:
91 case DPS310_TMP_B2:
92 case DPS310_TMP_B1:
93 case DPS310_TMP_B0:
94 case DPS310_PRS_CFG:
95 case DPS310_TMP_CFG:
96 case DPS310_MEAS_CFG:
97 case DPS310_CFG_REG:
98 case DPS310_COEF_BASE...DPS310_COEF_LAST:
99 case DPS310_COEF_SRC:
100 case 0x32: /* Undocumented register to indicate workaround not required */
101 return s->regs[reg];
102 default:
103 qemu_log_mask(LOG_UNIMP, "%s: register 0x%02x unimplemented\n",
104 __func__, reg);
105 return 0xFF;
109 static void dps310_write(DPS310State *s, uint8_t reg, uint8_t data)
111 if (reg >= sizeof(s->regs)) {
112 qemu_log_mask(LOG_GUEST_ERROR, "%s: register %d out of bounds\n",
113 __func__, s->pointer);
114 return;
117 switch (reg) {
118 case DPS310_RESET:
119 if (data == DPS310_RESET_MAGIC) {
120 device_cold_reset(DEVICE(s));
122 break;
123 case DPS310_PRS_CFG:
124 case DPS310_TMP_CFG:
125 case DPS310_MEAS_CFG:
126 case DPS310_CFG_REG:
127 s->regs[reg] = data;
128 break;
129 default:
130 qemu_log_mask(LOG_UNIMP, "%s: register 0x%02x unimplemented\n",
131 __func__, reg);
132 return;
136 static uint8_t dps310_rx(I2CSlave *i2c)
138 DPS310State *s = DPS310(i2c);
140 if (s->len == 1) {
141 return dps310_read(s, s->pointer++);
142 } else {
143 return 0xFF;
147 static int dps310_tx(I2CSlave *i2c, uint8_t data)
149 DPS310State *s = DPS310(i2c);
151 if (s->len == 0) {
153 * first byte is the register pointer for a read or write
154 * operation
156 s->pointer = data;
157 s->len++;
158 } else if (s->len == 1) {
159 dps310_write(s, s->pointer++, data);
162 return 0;
165 static int dps310_event(I2CSlave *i2c, enum i2c_event event)
167 DPS310State *s = DPS310(i2c);
169 switch (event) {
170 case I2C_START_SEND:
171 s->pointer = 0xFF;
172 s->len = 0;
173 break;
174 case I2C_START_RECV:
175 if (s->len != 1) {
176 qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid recv sequence\n",
177 __func__);
179 break;
180 default:
181 break;
184 return 0;
187 static const VMStateDescription vmstate_dps310 = {
188 .name = "DPS310",
189 .version_id = 0,
190 .minimum_version_id = 0,
191 .fields = (const VMStateField[]) {
192 VMSTATE_UINT8(len, DPS310State),
193 VMSTATE_UINT8_ARRAY(regs, DPS310State, NUM_REGISTERS),
194 VMSTATE_UINT8(pointer, DPS310State),
195 VMSTATE_I2C_SLAVE(i2c, DPS310State),
196 VMSTATE_END_OF_LIST()
200 static void dps310_class_init(ObjectClass *klass, void *data)
202 DeviceClass *dc = DEVICE_CLASS(klass);
203 I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
205 k->event = dps310_event;
206 k->recv = dps310_rx;
207 k->send = dps310_tx;
208 device_class_set_legacy_reset(dc, dps310_reset);
209 dc->vmsd = &vmstate_dps310;
212 static const TypeInfo dps310_info = {
213 .name = TYPE_DPS310,
214 .parent = TYPE_I2C_SLAVE,
215 .instance_size = sizeof(DPS310State),
216 .class_init = dps310_class_init,
219 static void dps310_register_types(void)
221 type_register_static(&dps310_info);
224 type_init(dps310_register_types)