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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 | // SPDX-License-Identifier: GPL-2.0-only /* * ultra45_env.c: Driver for Ultra45 PIC16F747 environmental monitor. * * Copyright (C) 2008 David S. Miller <davem@davemloft.net> */ #include <linux/kernel.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/io.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #define DRV_MODULE_VERSION "0.1" MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); MODULE_DESCRIPTION("Ultra45 environmental monitor driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_MODULE_VERSION); /* PIC device registers */ #define REG_CMD 0x00UL #define REG_CMD_RESET 0x80 #define REG_CMD_ESTAR 0x01 #define REG_STAT 0x01UL #define REG_STAT_FWVER 0xf0 #define REG_STAT_TGOOD 0x08 #define REG_STAT_STALE 0x04 #define REG_STAT_BUSY 0x02 #define REG_STAT_FAULT 0x01 #define REG_DATA 0x40UL #define REG_ADDR 0x41UL #define REG_SIZE 0x42UL /* Registers accessed indirectly via REG_DATA/REG_ADDR */ #define IREG_FAN0 0x00 #define IREG_FAN1 0x01 #define IREG_FAN2 0x02 #define IREG_FAN3 0x03 #define IREG_FAN4 0x04 #define IREG_FAN5 0x05 #define IREG_LCL_TEMP 0x06 #define IREG_RMT1_TEMP 0x07 #define IREG_RMT2_TEMP 0x08 #define IREG_RMT3_TEMP 0x09 #define IREG_LM95221_TEMP 0x0a #define IREG_FIRE_TEMP 0x0b #define IREG_LSI1064_TEMP 0x0c #define IREG_FRONT_TEMP 0x0d #define IREG_FAN_STAT 0x0e #define IREG_VCORE0 0x0f #define IREG_VCORE1 0x10 #define IREG_VMEM0 0x11 #define IREG_VMEM1 0x12 #define IREG_PSU_TEMP 0x13 struct env { void __iomem *regs; spinlock_t lock; struct device *hwmon_dev; }; static u8 env_read(struct env *p, u8 ireg) { u8 ret; spin_lock(&p->lock); writeb(ireg, p->regs + REG_ADDR); ret = readb(p->regs + REG_DATA); spin_unlock(&p->lock); return ret; } static void env_write(struct env *p, u8 ireg, u8 val) { spin_lock(&p->lock); writeb(ireg, p->regs + REG_ADDR); writeb(val, p->regs + REG_DATA); spin_unlock(&p->lock); } /* * There seems to be a adr7462 providing these values, thus a lot * of these calculations are borrowed from the adt7470 driver. */ #define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x)) #define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM #define FAN_PERIOD_INVALID (0xff << 8) #define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID) static ssize_t show_fan_speed(struct device *dev, struct device_attribute *attr, char *buf) { int fan_nr = to_sensor_dev_attr(attr)->index; struct env *p = dev_get_drvdata(dev); int rpm, period; u8 val; val = env_read(p, IREG_FAN0 + fan_nr); period = (int) val << 8; if (FAN_DATA_VALID(period)) rpm = FAN_PERIOD_TO_RPM(period); else rpm = 0; return sprintf(buf, "%d\n", rpm); } static ssize_t set_fan_speed(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int fan_nr = to_sensor_dev_attr(attr)->index; unsigned long rpm; struct env *p = dev_get_drvdata(dev); int period; u8 val; int err; err = kstrtoul(buf, 10, &rpm); if (err) return err; if (!rpm) return -EINVAL; period = FAN_RPM_TO_PERIOD(rpm); val = period >> 8; env_write(p, IREG_FAN0 + fan_nr, val); return count; } static ssize_t show_fan_fault(struct device *dev, struct device_attribute *attr, char *buf) { int fan_nr = to_sensor_dev_attr(attr)->index; struct env *p = dev_get_drvdata(dev); u8 val = env_read(p, IREG_FAN_STAT); return sprintf(buf, "%d\n", (val & (1 << fan_nr)) ? 1 : 0); } #define fan(index) \ static SENSOR_DEVICE_ATTR(fan##index##_speed, S_IRUGO | S_IWUSR, \ show_fan_speed, set_fan_speed, index); \ static SENSOR_DEVICE_ATTR(fan##index##_fault, S_IRUGO, \ show_fan_fault, NULL, index) fan(0); fan(1); fan(2); fan(3); fan(4); static SENSOR_DEVICE_ATTR(psu_fan_fault, S_IRUGO, show_fan_fault, NULL, 6); static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf) { int temp_nr = to_sensor_dev_attr(attr)->index; struct env *p = dev_get_drvdata(dev); s8 val; val = env_read(p, IREG_LCL_TEMP + temp_nr); return sprintf(buf, "%d\n", ((int) val) - 64); } static SENSOR_DEVICE_ATTR(adt7462_local_temp, S_IRUGO, show_temp, NULL, 0); static SENSOR_DEVICE_ATTR(cpu0_temp, S_IRUGO, show_temp, NULL, 1); static SENSOR_DEVICE_ATTR(cpu1_temp, S_IRUGO, show_temp, NULL, 2); static SENSOR_DEVICE_ATTR(motherboard_temp, S_IRUGO, show_temp, NULL, 3); static SENSOR_DEVICE_ATTR(lm95221_local_temp, S_IRUGO, show_temp, NULL, 4); static SENSOR_DEVICE_ATTR(fire_temp, S_IRUGO, show_temp, NULL, 5); static SENSOR_DEVICE_ATTR(lsi1064_local_temp, S_IRUGO, show_temp, NULL, 6); static SENSOR_DEVICE_ATTR(front_panel_temp, S_IRUGO, show_temp, NULL, 7); static SENSOR_DEVICE_ATTR(psu_temp, S_IRUGO, show_temp, NULL, 13); static ssize_t show_stat_bit(struct device *dev, struct device_attribute *attr, char *buf) { int index = to_sensor_dev_attr(attr)->index; struct env *p = dev_get_drvdata(dev); u8 val; val = readb(p->regs + REG_STAT); return sprintf(buf, "%d\n", (val & (1 << index)) ? 1 : 0); } static SENSOR_DEVICE_ATTR(fan_failure, S_IRUGO, show_stat_bit, NULL, 0); static SENSOR_DEVICE_ATTR(env_bus_busy, S_IRUGO, show_stat_bit, NULL, 1); static SENSOR_DEVICE_ATTR(env_data_stale, S_IRUGO, show_stat_bit, NULL, 2); static SENSOR_DEVICE_ATTR(tpm_self_test_passed, S_IRUGO, show_stat_bit, NULL, 3); static ssize_t show_fwver(struct device *dev, struct device_attribute *attr, char *buf) { struct env *p = dev_get_drvdata(dev); u8 val; val = readb(p->regs + REG_STAT); return sprintf(buf, "%d\n", val >> 4); } static SENSOR_DEVICE_ATTR(firmware_version, S_IRUGO, show_fwver, NULL, 0); static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "ultra45\n"); } static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0); static struct attribute *env_attributes[] = { &sensor_dev_attr_fan0_speed.dev_attr.attr, &sensor_dev_attr_fan0_fault.dev_attr.attr, &sensor_dev_attr_fan1_speed.dev_attr.attr, &sensor_dev_attr_fan1_fault.dev_attr.attr, &sensor_dev_attr_fan2_speed.dev_attr.attr, &sensor_dev_attr_fan2_fault.dev_attr.attr, &sensor_dev_attr_fan3_speed.dev_attr.attr, &sensor_dev_attr_fan3_fault.dev_attr.attr, &sensor_dev_attr_fan4_speed.dev_attr.attr, &sensor_dev_attr_fan4_fault.dev_attr.attr, &sensor_dev_attr_psu_fan_fault.dev_attr.attr, &sensor_dev_attr_adt7462_local_temp.dev_attr.attr, &sensor_dev_attr_cpu0_temp.dev_attr.attr, &sensor_dev_attr_cpu1_temp.dev_attr.attr, &sensor_dev_attr_motherboard_temp.dev_attr.attr, &sensor_dev_attr_lm95221_local_temp.dev_attr.attr, &sensor_dev_attr_fire_temp.dev_attr.attr, &sensor_dev_attr_lsi1064_local_temp.dev_attr.attr, &sensor_dev_attr_front_panel_temp.dev_attr.attr, &sensor_dev_attr_psu_temp.dev_attr.attr, &sensor_dev_attr_fan_failure.dev_attr.attr, &sensor_dev_attr_env_bus_busy.dev_attr.attr, &sensor_dev_attr_env_data_stale.dev_attr.attr, &sensor_dev_attr_tpm_self_test_passed.dev_attr.attr, &sensor_dev_attr_firmware_version.dev_attr.attr, &sensor_dev_attr_name.dev_attr.attr, NULL, }; static const struct attribute_group env_group = { .attrs = env_attributes, }; static int env_probe(struct platform_device *op) { struct env *p = devm_kzalloc(&op->dev, sizeof(*p), GFP_KERNEL); int err = -ENOMEM; if (!p) goto out; spin_lock_init(&p->lock); p->regs = of_ioremap(&op->resource[0], 0, REG_SIZE, "pic16f747"); if (!p->regs) goto out; err = sysfs_create_group(&op->dev.kobj, &env_group); if (err) goto out_iounmap; p->hwmon_dev = hwmon_device_register(&op->dev); if (IS_ERR(p->hwmon_dev)) { err = PTR_ERR(p->hwmon_dev); goto out_sysfs_remove_group; } platform_set_drvdata(op, p); err = 0; out: return err; out_sysfs_remove_group: sysfs_remove_group(&op->dev.kobj, &env_group); out_iounmap: of_iounmap(&op->resource[0], p->regs, REG_SIZE); goto out; } static int env_remove(struct platform_device *op) { struct env *p = platform_get_drvdata(op); if (p) { sysfs_remove_group(&op->dev.kobj, &env_group); hwmon_device_unregister(p->hwmon_dev); of_iounmap(&op->resource[0], p->regs, REG_SIZE); } return 0; } static const struct of_device_id env_match[] = { { .name = "env-monitor", .compatible = "SUNW,ebus-pic16f747-env", }, {}, }; MODULE_DEVICE_TABLE(of, env_match); static struct platform_driver env_driver = { .driver = { .name = "ultra45_env", .of_match_table = env_match, }, .probe = env_probe, .remove = env_remove, }; module_platform_driver(env_driver); |