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 }; |
Martin Roth | fab89b3 | 2023-10-23 17:47:03 -0600 | [diff] [blame] | 14 | if (!dev) |
| 15 | return false; |
Nico Huber | 51a35764 | 2022-08-01 19:32:37 +0200 | [diff] [blame] | 16 | return dev->ops->ops_i2c_bus->transfer(dev, &seg, 1) == 0; |
Matt DeVillier | ee849ba | 2022-05-19 19:03:07 -0500 | [diff] [blame] | 17 | } |
| 18 | |
Matt DeVillier | 190086e | 2022-03-28 22:24:30 -0500 | [diff] [blame] | 19 | struct bus *i2c_link(const struct device *const dev) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 20 | { |
Arthur Heymans | 7fcd4d5 | 2023-08-24 15:12:19 +0200 | [diff] [blame] | 21 | if (!dev || !dev->upstream) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 22 | return NULL; |
| 23 | |
Arthur Heymans | 7fcd4d5 | 2023-08-24 15:12:19 +0200 | [diff] [blame] | 24 | struct bus *link = dev->upstream; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 25 | while (link) { |
| 26 | struct device *const parent = link->dev; |
| 27 | |
| 28 | if (parent && parent->ops && |
| 29 | (parent->ops->ops_i2c_bus || parent->ops->ops_smbus_bus)) |
| 30 | break; |
| 31 | |
Arthur Heymans | 7fcd4d5 | 2023-08-24 15:12:19 +0200 | [diff] [blame] | 32 | if (parent && parent->upstream && link != parent->upstream) |
| 33 | link = parent->upstream; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 34 | else |
| 35 | link = NULL; |
| 36 | } |
| 37 | |
Frans Hendriks | 68dc369 | 2021-02-01 11:52:51 +0100 | [diff] [blame] | 38 | if (!link) |
Matt DeVillier | e97eb8f | 2022-06-18 15:28:00 -0500 | [diff] [blame] | 39 | printk(BIOS_ALERT, "%s Cannot find I2C or SMBus bus operations\n", |
| 40 | dev_path(dev)); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 41 | |
| 42 | return link; |
| 43 | } |
| 44 | |
Aaron Durbin | 439cee9 | 2018-01-22 21:24:35 -0700 | [diff] [blame] | 45 | int i2c_dev_readb(struct device *const dev) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 46 | { |
| 47 | struct device *const busdev = i2c_busdev(dev); |
| 48 | if (!busdev) |
| 49 | return -1; |
| 50 | |
| 51 | if (busdev->ops->ops_i2c_bus) { |
| 52 | uint8_t val; |
| 53 | const struct i2c_msg msg = { |
| 54 | .flags = I2C_M_RD, |
| 55 | .slave = dev->path.i2c.device, |
| 56 | .buf = &val, |
| 57 | .len = sizeof(val), |
| 58 | }; |
| 59 | |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 60 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, &msg, 1); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 61 | if (ret) |
| 62 | return ret; |
| 63 | else |
| 64 | return val; |
| 65 | } else if (busdev->ops->ops_smbus_bus->recv_byte) { |
| 66 | return busdev->ops->ops_smbus_bus->recv_byte(dev); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 67 | } |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 68 | |
| 69 | printk(BIOS_ERR, "%s Missing ops_smbus_bus->recv_byte", dev_path(busdev)); |
| 70 | return -1; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 71 | } |
| 72 | |
Aaron Durbin | 439cee9 | 2018-01-22 21:24:35 -0700 | [diff] [blame] | 73 | int i2c_dev_writeb(struct device *const dev, uint8_t val) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 74 | { |
| 75 | struct device *const busdev = i2c_busdev(dev); |
| 76 | if (!busdev) |
| 77 | return -1; |
| 78 | |
| 79 | if (busdev->ops->ops_i2c_bus) { |
| 80 | const struct i2c_msg msg = { |
| 81 | .flags = 0, |
| 82 | .slave = dev->path.i2c.device, |
| 83 | .buf = &val, |
| 84 | .len = sizeof(val), |
| 85 | }; |
| 86 | return busdev->ops->ops_i2c_bus->transfer(busdev, &msg, 1); |
| 87 | } else if (busdev->ops->ops_smbus_bus->send_byte) { |
| 88 | return busdev->ops->ops_smbus_bus->send_byte(dev, val); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 89 | } |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 90 | |
Frans Hendriks | 68dc369 | 2021-02-01 11:52:51 +0100 | [diff] [blame] | 91 | 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] | 92 | return -1; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 93 | } |
| 94 | |
Aaron Durbin | 439cee9 | 2018-01-22 21:24:35 -0700 | [diff] [blame] | 95 | int i2c_dev_readb_at(struct device *const dev, uint8_t off) |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 96 | { |
| 97 | struct device *const busdev = i2c_busdev(dev); |
| 98 | if (!busdev) |
| 99 | return -1; |
| 100 | |
| 101 | if (busdev->ops->ops_i2c_bus) { |
| 102 | uint8_t val; |
| 103 | const struct i2c_msg msg[] = { |
| 104 | { |
| 105 | .flags = 0, |
| 106 | .slave = dev->path.i2c.device, |
| 107 | .buf = &off, |
| 108 | .len = sizeof(off), |
| 109 | }, |
| 110 | { |
| 111 | .flags = I2C_M_RD, |
| 112 | .slave = dev->path.i2c.device, |
| 113 | .buf = &val, |
| 114 | .len = sizeof(val), |
| 115 | }, |
| 116 | }; |
| 117 | |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 118 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, msg, |
| 119 | ARRAY_SIZE(msg)); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 120 | if (ret) |
| 121 | return ret; |
| 122 | else |
| 123 | return val; |
| 124 | } else if (busdev->ops->ops_smbus_bus->read_byte) { |
| 125 | return busdev->ops->ops_smbus_bus->read_byte(dev, off); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 126 | } |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 127 | |
| 128 | printk(BIOS_ERR, "%s Missing ops_smbus_bus->read_byte", dev_path(busdev)); |
| 129 | return -1; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 130 | } |
| 131 | |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 132 | 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] | 133 | { |
| 134 | struct device *const busdev = i2c_busdev(dev); |
| 135 | if (!busdev) |
| 136 | return -1; |
| 137 | |
| 138 | if (busdev->ops->ops_i2c_bus) { |
| 139 | uint8_t buf[] = { off, val }; |
| 140 | const struct i2c_msg msg = { |
| 141 | .flags = 0, |
| 142 | .slave = dev->path.i2c.device, |
| 143 | .buf = buf, |
| 144 | .len = sizeof(buf), |
| 145 | }; |
| 146 | return busdev->ops->ops_i2c_bus->transfer(busdev, &msg, 1); |
| 147 | } else if (busdev->ops->ops_smbus_bus->write_byte) { |
| 148 | return busdev->ops->ops_smbus_bus->write_byte(dev, off, val); |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 149 | } |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 150 | |
Frans Hendriks | 68dc369 | 2021-02-01 11:52:51 +0100 | [diff] [blame] | 151 | 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] | 152 | return -1; |
Nico Huber | 5817386 | 2017-08-01 17:09:35 +0200 | [diff] [blame] | 153 | } |
Nico Huber | 9734af6 | 2017-11-01 13:15:33 +0100 | [diff] [blame] | 154 | |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 155 | int i2c_dev_read_at16(struct device *const dev, uint8_t *const buf, const size_t len, |
| 156 | uint16_t off) |
Nico Huber | 9734af6 | 2017-11-01 13:15:33 +0100 | [diff] [blame] | 157 | { |
| 158 | struct device *const busdev = i2c_busdev(dev); |
| 159 | if (!busdev) |
| 160 | return -1; |
| 161 | |
| 162 | if (busdev->ops->ops_i2c_bus) { |
| 163 | const struct i2c_msg msg[] = { |
| 164 | { |
| 165 | .flags = 0, |
| 166 | .slave = dev->path.i2c.device, |
| 167 | .buf = (uint8_t *)&off, |
| 168 | .len = sizeof(off), |
| 169 | }, |
| 170 | { |
| 171 | .flags = I2C_M_RD, |
| 172 | .slave = dev->path.i2c.device, |
| 173 | .buf = buf, |
| 174 | .len = len, |
| 175 | }, |
| 176 | }; |
| 177 | |
| 178 | write_be16(&off, off); |
Frans Hendriks | a9caa50 | 2021-02-01 11:44:37 +0100 | [diff] [blame] | 179 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, msg, |
| 180 | ARRAY_SIZE(msg)); |
Nico Huber | 9734af6 | 2017-11-01 13:15:33 +0100 | [diff] [blame] | 181 | if (ret) |
| 182 | return ret; |
| 183 | else |
| 184 | return len; |
| 185 | } else { |
| 186 | printk(BIOS_ERR, "%s Missing ops_i2c_bus->transfer", dev_path(busdev)); |
| 187 | return -1; |
| 188 | } |
| 189 | } |
Werner Zeh | 63f72f0 | 2022-08-26 13:17:52 +0200 | [diff] [blame] | 190 | |
| 191 | int i2c_dev_read_at(struct device *const dev, uint8_t *const buf, const size_t len, |
| 192 | uint8_t off) |
| 193 | { |
| 194 | struct device *const busdev = i2c_busdev(dev); |
| 195 | if (!busdev) |
| 196 | return -1; |
| 197 | |
| 198 | if (busdev->ops->ops_i2c_bus) { |
| 199 | const struct i2c_msg msg[] = { |
| 200 | { |
| 201 | .flags = 0, |
| 202 | .slave = dev->path.i2c.device, |
| 203 | .buf = &off, |
| 204 | .len = sizeof(off), |
| 205 | }, |
| 206 | { |
| 207 | .flags = I2C_M_RD, |
| 208 | .slave = dev->path.i2c.device, |
| 209 | .buf = buf, |
| 210 | .len = len, |
| 211 | }, |
| 212 | }; |
| 213 | |
| 214 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, msg, |
| 215 | ARRAY_SIZE(msg)); |
| 216 | if (ret) |
| 217 | return ret; |
| 218 | else |
| 219 | return len; |
| 220 | } else { |
| 221 | printk(BIOS_ERR, "%s Missing ops_i2c_bus->transfer", dev_path(busdev)); |
| 222 | return -1; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | int i2c_dev_write_at(struct device *const dev, uint8_t *const buf, const size_t len, |
| 227 | uint8_t off) |
| 228 | { |
| 229 | struct device *const busdev = i2c_busdev(dev); |
| 230 | if (!busdev) |
| 231 | return -1; |
| 232 | |
| 233 | if (busdev->ops->ops_i2c_bus) { |
| 234 | const struct i2c_msg msg[] = { |
| 235 | { |
| 236 | .flags = 0, |
| 237 | .slave = dev->path.i2c.device, |
| 238 | .buf = &off, |
| 239 | .len = sizeof(off), |
| 240 | }, |
| 241 | { |
| 242 | .flags = I2C_M_NOSTART, |
| 243 | .slave = dev->path.i2c.device, |
| 244 | .buf = buf, |
| 245 | .len = len, |
| 246 | }, |
| 247 | }; |
| 248 | |
| 249 | const int ret = busdev->ops->ops_i2c_bus->transfer(busdev, msg, |
| 250 | ARRAY_SIZE(msg)); |
| 251 | if (ret) |
| 252 | return ret; |
| 253 | else |
| 254 | return len; |
| 255 | } else { |
| 256 | printk(BIOS_ERR, "%s Missing ops_i2c_bus->transfer", dev_path(busdev)); |
| 257 | return -1; |
| 258 | } |
| 259 | } |