Angel Pons | c74dae9 | 2020-04-02 23:48:16 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 2 | |
Elyes Haouas | 04c3b5a | 2022-10-07 10:08:05 +0200 | [diff] [blame] | 3 | #include <commonlib/bsd/helpers.h> |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 4 | #include <console/console.h> |
Elyes Haouas | 04c3b5a | 2022-10-07 10:08:05 +0200 | [diff] [blame] | 5 | #include <device/device.h> |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 6 | #include <device/smbus.h> |
| 7 | #include <device/i2c_bus.h> |
Nico Huber | 9734af6 | 2017-11-01 13:15:33 +0100 | [diff] [blame] | 8 | #include <commonlib/endian.h> |
Elyes Haouas | 04c3b5a | 2022-10-07 10:08:05 +0200 | [diff] [blame] | 9 | #include <types.h> |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 10 | |
Matt DeVillier | ee849ba | 2022-05-19 19:03:07 -0500 | [diff] [blame] | 11 | bool i2c_dev_detect(struct device *dev, unsigned int addr) |
| 12 | { |
| 13 | struct i2c_msg seg = { .flags = 0, .slave = addr, .buf = NULL, .len = 0 }; |
Nico Huber | 51a35764 | 2022-08-01 19:32:37 +0200 | [diff] [blame] | 14 | return dev->ops->ops_i2c_bus->transfer(dev, &seg, 1) == 0; |
Matt DeVillier | ee849ba | 2022-05-19 19:03:07 -0500 | [diff] [blame] | 15 | } |
| 16 | |
Matt DeVillier | 190086e | 2022-03-28 22:24:30 -0500 | [diff] [blame] | 17 | struct bus *i2c_link(const struct device *const dev) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 18 | { |
| 19 | if (!dev || !dev->bus) |
| 20 | return NULL; |
| 21 | |
| 22 | struct bus *link = dev->bus; |
| 23 | while (link) { |
| 24 | struct device *const parent = link->dev; |
| 25 | |
| 26 | if (parent && parent->ops && |
| 27 | (parent->ops->ops_i2c_bus || parent->ops->ops_smbus_bus)) |
| 28 | break; |
| 29 | |
Matt DeVillier | 06abb91 | 2022-06-18 15:22:47 -0500 | [diff] [blame] | 30 | if (parent && parent->bus && link != parent->bus) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 31 | link = parent->bus; |
| 32 | else |
| 33 | link = NULL; |
| 34 | } |
| 35 | |
Frans Hendriks | 68dc369 | 2021-02-01 11:52:51 +0100 | [diff] [blame] | 36 | if (!link) |
Matt DeVillier | e97eb8f | 2022-06-18 15:28:00 -0500 | [diff] [blame] | 37 | printk(BIOS_ALERT, "%s Cannot find I2C or SMBus bus operations\n", |
| 38 | dev_path(dev)); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 39 | |
| 40 | return link; |
| 41 | } |
| 42 | |
Aaron Durbin | 439cee9 | 2018-01-22 21:24:35 -0700 | [diff] [blame] | 43 | int i2c_dev_readb(struct device *const dev) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 44 | { |
| 45 | struct device *const busdev = i2c_busdev(dev); |
| 46 | if (!busdev) |
| 47 | return -1; |
| 48 | |
| 49 | if (busdev->ops->ops_i2c_bus) { |
| 50 | uint8_t val; |
| 51 | const struct i2c_msg msg = { |
| 52 | .flags = I2C_M_RD, |
| 53 | .slave = dev->path.i2c.device, |
| 54 | .buf = &val, |
| 55 | .len = sizeof(val), |
| 56 | }; |
| 57 | |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 58 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, &msg, 1); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 59 | if (ret) |
| 60 | return ret; |
| 61 | else |
| 62 | return val; |
| 63 | } else if (busdev->ops->ops_smbus_bus->recv_byte) { |
| 64 | return busdev->ops->ops_smbus_bus->recv_byte(dev); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 65 | } |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 66 | |
| 67 | printk(BIOS_ERR, "%s Missing ops_smbus_bus->recv_byte", dev_path(busdev)); |
| 68 | return -1; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 69 | } |
| 70 | |
Aaron Durbin | 439cee9 | 2018-01-22 21:24:35 -0700 | [diff] [blame] | 71 | int i2c_dev_writeb(struct device *const dev, uint8_t val) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 72 | { |
| 73 | struct device *const busdev = i2c_busdev(dev); |
| 74 | if (!busdev) |
| 75 | return -1; |
| 76 | |
| 77 | if (busdev->ops->ops_i2c_bus) { |
| 78 | const struct i2c_msg msg = { |
| 79 | .flags = 0, |
| 80 | .slave = dev->path.i2c.device, |
| 81 | .buf = &val, |
| 82 | .len = sizeof(val), |
| 83 | }; |
| 84 | return busdev->ops->ops_i2c_bus->transfer(busdev, &msg, 1); |
| 85 | } else if (busdev->ops->ops_smbus_bus->send_byte) { |
| 86 | return busdev->ops->ops_smbus_bus->send_byte(dev, val); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 87 | } |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 88 | |
Frans Hendriks | 68dc369 | 2021-02-01 11:52:51 +0100 | [diff] [blame] | 89 | printk(BIOS_ERR, "%s Missing ops_smbus_bus->send_byte", dev_path(busdev)); |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 90 | return -1; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 91 | } |
| 92 | |
Aaron Durbin | 439cee9 | 2018-01-22 21:24:35 -0700 | [diff] [blame] | 93 | int i2c_dev_readb_at(struct device *const dev, uint8_t off) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 94 | { |
| 95 | struct device *const busdev = i2c_busdev(dev); |
| 96 | if (!busdev) |
| 97 | return -1; |
| 98 | |
| 99 | if (busdev->ops->ops_i2c_bus) { |
| 100 | uint8_t val; |
| 101 | const struct i2c_msg msg[] = { |
| 102 | { |
| 103 | .flags = 0, |
| 104 | .slave = dev->path.i2c.device, |
| 105 | .buf = &off, |
| 106 | .len = sizeof(off), |
| 107 | }, |
| 108 | { |
| 109 | .flags = I2C_M_RD, |
| 110 | .slave = dev->path.i2c.device, |
| 111 | .buf = &val, |
| 112 | .len = sizeof(val), |
| 113 | }, |
| 114 | }; |
| 115 | |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 116 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, msg, |
| 117 | ARRAY_SIZE(msg)); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 118 | if (ret) |
| 119 | return ret; |
| 120 | else |
| 121 | return val; |
| 122 | } else if (busdev->ops->ops_smbus_bus->read_byte) { |
| 123 | return busdev->ops->ops_smbus_bus->read_byte(dev, off); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 124 | } |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 125 | |
| 126 | printk(BIOS_ERR, "%s Missing ops_smbus_bus->read_byte", dev_path(busdev)); |
| 127 | return -1; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 128 | } |
| 129 | |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 130 | int i2c_dev_writeb_at(struct device *const dev, const uint8_t off, const uint8_t val) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 131 | { |
| 132 | struct device *const busdev = i2c_busdev(dev); |
| 133 | if (!busdev) |
| 134 | return -1; |
| 135 | |
| 136 | if (busdev->ops->ops_i2c_bus) { |
| 137 | uint8_t buf[] = { off, val }; |
| 138 | const struct i2c_msg msg = { |
| 139 | .flags = 0, |
| 140 | .slave = dev->path.i2c.device, |
| 141 | .buf = buf, |
| 142 | .len = sizeof(buf), |
| 143 | }; |
| 144 | return busdev->ops->ops_i2c_bus->transfer(busdev, &msg, 1); |
| 145 | } else if (busdev->ops->ops_smbus_bus->write_byte) { |
| 146 | return busdev->ops->ops_smbus_bus->write_byte(dev, off, val); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 147 | } |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 148 | |
Frans Hendriks | 68dc369 | 2021-02-01 11:52:51 +0100 | [diff] [blame] | 149 | printk(BIOS_ERR, "%s Missing ops_smbus_bus->write_byte", dev_path(busdev)); |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 150 | return -1; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 151 | } |
Nico Huber | 9734af6 | 2017-11-01 13:15:33 +0100 | [diff] [blame] | 152 | |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 153 | int i2c_dev_read_at16(struct device *const dev, uint8_t *const buf, const size_t len, |
| 154 | uint16_t off) |
Nico Huber | 9734af6 | 2017-11-01 13:15:33 +0100 | [diff] [blame] | 155 | { |
| 156 | struct device *const busdev = i2c_busdev(dev); |
| 157 | if (!busdev) |
| 158 | return -1; |
| 159 | |
| 160 | if (busdev->ops->ops_i2c_bus) { |
| 161 | const struct i2c_msg msg[] = { |
| 162 | { |
| 163 | .flags = 0, |
| 164 | .slave = dev->path.i2c.device, |
| 165 | .buf = (uint8_t *)&off, |
| 166 | .len = sizeof(off), |
| 167 | }, |
| 168 | { |
| 169 | .flags = I2C_M_RD, |
| 170 | .slave = dev->path.i2c.device, |
| 171 | .buf = buf, |
| 172 | .len = len, |
| 173 | }, |
| 174 | }; |
| 175 | |
| 176 | write_be16(&off, off); |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 177 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, msg, |
| 178 | ARRAY_SIZE(msg)); |
Nico Huber | 9734af6 | 2017-11-01 13:15:33 +0100 | [diff] [blame] | 179 | if (ret) |
| 180 | return ret; |
| 181 | else |
| 182 | return len; |
| 183 | } else { |
| 184 | printk(BIOS_ERR, "%s Missing ops_i2c_bus->transfer", dev_path(busdev)); |
| 185 | return -1; |
| 186 | } |
| 187 | } |
Werner Zeh | 63f72f0 | 2022-08-26 13:17:52 +0200 | [diff] [blame] | 188 | |
| 189 | int i2c_dev_read_at(struct device *const dev, uint8_t *const buf, const size_t len, |
| 190 | uint8_t off) |
| 191 | { |
| 192 | struct device *const busdev = i2c_busdev(dev); |
| 193 | if (!busdev) |
| 194 | return -1; |
| 195 | |
| 196 | if (busdev->ops->ops_i2c_bus) { |
| 197 | const struct i2c_msg msg[] = { |
| 198 | { |
| 199 | .flags = 0, |
| 200 | .slave = dev->path.i2c.device, |
| 201 | .buf = &off, |
| 202 | .len = sizeof(off), |
| 203 | }, |
| 204 | { |
| 205 | .flags = I2C_M_RD, |
| 206 | .slave = dev->path.i2c.device, |
| 207 | .buf = buf, |
| 208 | .len = len, |
| 209 | }, |
| 210 | }; |
| 211 | |
| 212 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, msg, |
| 213 | ARRAY_SIZE(msg)); |
| 214 | if (ret) |
| 215 | return ret; |
| 216 | else |
| 217 | return len; |
| 218 | } else { |
| 219 | printk(BIOS_ERR, "%s Missing ops_i2c_bus->transfer", dev_path(busdev)); |
| 220 | return -1; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | int i2c_dev_write_at(struct device *const dev, uint8_t *const buf, const size_t len, |
| 225 | uint8_t off) |
| 226 | { |
| 227 | struct device *const busdev = i2c_busdev(dev); |
| 228 | if (!busdev) |
| 229 | return -1; |
| 230 | |
| 231 | if (busdev->ops->ops_i2c_bus) { |
| 232 | const struct i2c_msg msg[] = { |
| 233 | { |
| 234 | .flags = 0, |
| 235 | .slave = dev->path.i2c.device, |
| 236 | .buf = &off, |
| 237 | .len = sizeof(off), |
| 238 | }, |
| 239 | { |
| 240 | .flags = I2C_M_NOSTART, |
| 241 | .slave = dev->path.i2c.device, |
| 242 | .buf = buf, |
| 243 | .len = len, |
| 244 | }, |
| 245 | }; |
| 246 | |
| 247 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, msg, |
| 248 | ARRAY_SIZE(msg)); |
| 249 | if (ret) |
| 250 | return ret; |
| 251 | else |
| 252 | return len; |
| 253 | } else { |
| 254 | printk(BIOS_ERR, "%s Missing ops_i2c_bus->transfer", dev_path(busdev)); |
| 255 | return -1; |
| 256 | } |
| 257 | } |