diff options
Diffstat (limited to 'drivers/i2c/chips/smsc47m1.c')
| -rw-r--r-- | drivers/i2c/chips/smsc47m1.c | 593 |
1 files changed, 0 insertions, 593 deletions
diff --git a/drivers/i2c/chips/smsc47m1.c b/drivers/i2c/chips/smsc47m1.c deleted file mode 100644 index 897117a7213..00000000000 --- a/drivers/i2c/chips/smsc47m1.c +++ /dev/null @@ -1,593 +0,0 @@ -/* - smsc47m1.c - Part of lm_sensors, Linux kernel modules - for hardware monitoring - - Supports the SMSC LPC47B27x, LPC47M10x, LPC47M13x and LPC47M14x - Super-I/O chips. - - Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com> - Copyright (C) 2004 Jean Delvare <khali@linux-fr.org> - Ported to Linux 2.6 by Gabriele Gorla <gorlik@yahoo.com> - and Jean Delvare - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/ioport.h> -#include <linux/jiffies.h> -#include <linux/i2c.h> -#include <linux/i2c-sensor.h> -#include <linux/init.h> -#include <asm/io.h> - -static unsigned short normal_i2c[] = { I2C_CLIENT_END }; -/* Address is autodetected, there is no default value */ -static unsigned int normal_isa[] = { 0x0000, I2C_CLIENT_ISA_END }; -static struct i2c_force_data forces[] = {{NULL}}; - -enum chips { any_chip, smsc47m1 }; -static struct i2c_address_data addr_data = { - .normal_i2c = normal_i2c, - .normal_isa = normal_isa, - .forces = forces, -}; - -/* Super-I/0 registers and commands */ - -#define REG 0x2e /* The register to read/write */ -#define VAL 0x2f /* The value to read/write */ - -static inline void -superio_outb(int reg, int val) -{ - outb(reg, REG); - outb(val, VAL); -} - -static inline int -superio_inb(int reg) -{ - outb(reg, REG); - return inb(VAL); -} - -/* logical device for fans is 0x0A */ -#define superio_select() superio_outb(0x07, 0x0A) - -static inline void -superio_enter(void) -{ - outb(0x55, REG); -} - -static inline void -superio_exit(void) -{ - outb(0xAA, REG); -} - -#define SUPERIO_REG_ACT 0x30 -#define SUPERIO_REG_BASE 0x60 -#define SUPERIO_REG_DEVID 0x20 - -/* Logical device registers */ - -#define SMSC_EXTENT 0x80 - -/* nr is 0 or 1 in the macros below */ -#define SMSC47M1_REG_ALARM 0x04 -#define SMSC47M1_REG_TPIN(nr) (0x34 - (nr)) -#define SMSC47M1_REG_PPIN(nr) (0x36 - (nr)) -#define SMSC47M1_REG_PWM(nr) (0x56 + (nr)) -#define SMSC47M1_REG_FANDIV 0x58 -#define SMSC47M1_REG_FAN(nr) (0x59 + (nr)) -#define SMSC47M1_REG_FAN_PRELOAD(nr) (0x5B + (nr)) - -#define MIN_FROM_REG(reg,div) ((reg)>=192 ? 0 : \ - 983040/((192-(reg))*(div))) -#define FAN_FROM_REG(reg,div,preload) ((reg)<=(preload) || (reg)==255 ? 0 : \ - 983040/(((reg)-(preload))*(div))) -#define DIV_FROM_REG(reg) (1 << (reg)) -#define PWM_FROM_REG(reg) (((reg) & 0x7E) << 1) -#define PWM_EN_FROM_REG(reg) ((~(reg)) & 0x01) -#define PWM_TO_REG(reg) (((reg) >> 1) & 0x7E) - -struct smsc47m1_data { - struct i2c_client client; - struct semaphore lock; - - struct semaphore update_lock; - unsigned long last_updated; /* In jiffies */ - - u8 fan[2]; /* Register value */ - u8 fan_preload[2]; /* Register value */ - u8 fan_div[2]; /* Register encoding, shifted right */ - u8 alarms; /* Register encoding */ - u8 pwm[2]; /* Register value (bit 7 is enable) */ -}; - - -static int smsc47m1_attach_adapter(struct i2c_adapter *adapter); -static int smsc47m1_find(int *address); -static int smsc47m1_detect(struct i2c_adapter *adapter, int address, int kind); -static int smsc47m1_detach_client(struct i2c_client *client); - -static int smsc47m1_read_value(struct i2c_client *client, u8 reg); -static void smsc47m1_write_value(struct i2c_client *client, u8 reg, u8 value); - -static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, - int init); - - -static struct i2c_driver smsc47m1_driver = { - .owner = THIS_MODULE, - .name = "smsc47m1", - .id = I2C_DRIVERID_SMSC47M1, - .flags = I2C_DF_NOTIFY, - .attach_adapter = smsc47m1_attach_adapter, - .detach_client = smsc47m1_detach_client, -}; - -/* nr is 0 or 1 in the callback functions below */ - -static ssize_t get_fan(struct device *dev, char *buf, int nr) -{ - struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); - /* This chip (stupidly) stops monitoring fan speed if PWM is - enabled and duty cycle is 0%. This is fine if the monitoring - and control concern the same fan, but troublesome if they are - not (which could as well happen). */ - int rpm = (data->pwm[nr] & 0x7F) == 0x00 ? 0 : - FAN_FROM_REG(data->fan[nr], - DIV_FROM_REG(data->fan_div[nr]), - data->fan_preload[nr]); - return sprintf(buf, "%d\n", rpm); -} - -static ssize_t get_fan_min(struct device *dev, char *buf, int nr) -{ - struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); - int rpm = MIN_FROM_REG(data->fan_preload[nr], - DIV_FROM_REG(data->fan_div[nr])); - return sprintf(buf, "%d\n", rpm); -} - -static ssize_t get_fan_div(struct device *dev, char *buf, int nr) -{ - struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); - return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[nr])); -} - -static ssize_t get_pwm(struct device *dev, char *buf, int nr) -{ - struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); - return sprintf(buf, "%d\n", PWM_FROM_REG(data->pwm[nr])); -} - -static ssize_t get_pwm_en(struct device *dev, char *buf, int nr) -{ - struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); - return sprintf(buf, "%d\n", PWM_EN_FROM_REG(data->pwm[nr])); -} - -static ssize_t get_alarms(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct smsc47m1_data *data = smsc47m1_update_device(dev, 0); - return sprintf(buf, "%d\n", data->alarms); -} - -static ssize_t set_fan_min(struct device *dev, const char *buf, - size_t count, int nr) -{ - struct i2c_client *client = to_i2c_client(dev); - struct smsc47m1_data *data = i2c_get_clientdata(client); - long rpmdiv, val = simple_strtol(buf, NULL, 10); - - down(&data->update_lock); - rpmdiv = val * DIV_FROM_REG(data->fan_div[nr]); - - if (983040 > 192 * rpmdiv || 2 * rpmdiv > 983040) { - up(&data->update_lock); - return -EINVAL; - } - - data->fan_preload[nr] = 192 - ((983040 + rpmdiv / 2) / rpmdiv); - smsc47m1_write_value(client, SMSC47M1_REG_FAN_PRELOAD(nr), - data->fan_preload[nr]); - up(&data->update_lock); - - return count; -} - -/* Note: we save and restore the fan minimum here, because its value is - determined in part by the fan clock divider. This follows the principle - of least suprise; the user doesn't expect the fan minimum to change just - because the divider changed. */ -static ssize_t set_fan_div(struct device *dev, const char *buf, - size_t count, int nr) -{ - struct i2c_client *client = to_i2c_client(dev); - struct smsc47m1_data *data = i2c_get_clientdata(client); - - long new_div = simple_strtol(buf, NULL, 10), tmp; - u8 old_div = DIV_FROM_REG(data->fan_div[nr]); - - if (new_div == old_div) /* No change */ - return count; - - down(&data->update_lock); - switch (new_div) { - case 1: data->fan_div[nr] = 0; break; - case 2: data->fan_div[nr] = 1; break; - case 4: data->fan_div[nr] = 2; break; - case 8: data->fan_div[nr] = 3; break; - default: - up(&data->update_lock); - return -EINVAL; - } - - tmp = smsc47m1_read_value(client, SMSC47M1_REG_FANDIV) & 0x0F; - tmp |= (data->fan_div[0] << 4) | (data->fan_div[1] << 6); - smsc47m1_write_value(client, SMSC47M1_REG_FANDIV, tmp); - - /* Preserve fan min */ - tmp = 192 - (old_div * (192 - data->fan_preload[nr]) - + new_div / 2) / new_div; - data->fan_preload[nr] = SENSORS_LIMIT(tmp, 0, 191); - smsc47m1_write_value(client, SMSC47M1_REG_FAN_PRELOAD(nr), - data->fan_preload[nr]); - up(&data->update_lock); - - return count; -} - -static ssize_t set_pwm(struct device *dev, const char *buf, - size_t count, int nr) -{ - struct i2c_client *client = to_i2c_client(dev); - struct smsc47m1_data *data = i2c_get_clientdata(client); - - long val = simple_strtol(buf, NULL, 10); - - if (val < 0 || val > 255) - return -EINVAL; - - down(&data->update_lock); - data->pwm[nr] &= 0x81; /* Preserve additional bits */ - data->pwm[nr] |= PWM_TO_REG(val); - smsc47m1_write_value(client, SMSC47M1_REG_PWM(nr), - data->pwm[nr]); - up(&data->update_lock); - - return count; -} - -static ssize_t set_pwm_en(struct device *dev, const char *buf, - size_t count, int nr) -{ - struct i2c_client *client = to_i2c_client(dev); - struct smsc47m1_data *data = i2c_get_clientdata(client); - - long val = simple_strtol(buf, NULL, 10); - - if (val != 0 && val != 1) - return -EINVAL; - - down(&data->update_lock); - data->pwm[nr] &= 0xFE; /* preserve the other bits */ - data->pwm[nr] |= !val; - smsc47m1_write_value(client, SMSC47M1_REG_PWM(nr), - data->pwm[nr]); - up(&data->update_lock); - - return count; -} - -#define fan_present(offset) \ -static ssize_t get_fan##offset (struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - return get_fan(dev, buf, offset - 1); \ -} \ -static ssize_t get_fan##offset##_min (struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - return get_fan_min(dev, buf, offset - 1); \ -} \ -static ssize_t set_fan##offset##_min (struct device *dev, struct device_attribute *attr, \ - const char *buf, size_t count) \ -{ \ - return set_fan_min(dev, buf, count, offset - 1); \ -} \ -static ssize_t get_fan##offset##_div (struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - return get_fan_div(dev, buf, offset - 1); \ -} \ -static ssize_t set_fan##offset##_div (struct device *dev, struct device_attribute *attr, \ - const char *buf, size_t count) \ -{ \ - return set_fan_div(dev, buf, count, offset - 1); \ -} \ -static ssize_t get_pwm##offset (struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - return get_pwm(dev, buf, offset - 1); \ -} \ -static ssize_t set_pwm##offset (struct device *dev, struct device_attribute *attr, \ - const char *buf, size_t count) \ -{ \ - return set_pwm(dev, buf, count, offset - 1); \ -} \ -static ssize_t get_pwm##offset##_en (struct device *dev, struct device_attribute *attr, char *buf) \ -{ \ - return get_pwm_en(dev, buf, offset - 1); \ -} \ -static ssize_t set_pwm##offset##_en (struct device *dev, struct device_attribute *attr, \ - const char *buf, size_t count) \ -{ \ - return set_pwm_en(dev, buf, count, offset - 1); \ -} \ -static DEVICE_ATTR(fan##offset##_input, S_IRUGO, get_fan##offset, \ - NULL); \ -static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \ - get_fan##offset##_min, set_fan##offset##_min); \ -static DEVICE_ATTR(fan##offset##_div, S_IRUGO | S_IWUSR, \ - get_fan##offset##_div, set_fan##offset##_div); \ -static DEVICE_ATTR(pwm##offset, S_IRUGO | S_IWUSR, \ - get_pwm##offset, set_pwm##offset); \ -static DEVICE_ATTR(pwm##offset##_enable, S_IRUGO | S_IWUSR, \ - get_pwm##offset##_en, set_pwm##offset##_en); - -fan_present(1); -fan_present(2); - -static DEVICE_ATTR(alarms, S_IRUGO, get_alarms, NULL); - -static int smsc47m1_attach_adapter(struct i2c_adapter *adapter) -{ - if (!(adapter->class & I2C_CLASS_HWMON)) - return 0; - return i2c_detect(adapter, &addr_data, smsc47m1_detect); -} - -static int smsc47m1_find(int *address) -{ - u8 val; - - superio_enter(); - val = superio_inb(SUPERIO_REG_DEVID); - - /* - * SMSC LPC47M10x/LPC47M13x (device id 0x59), LPC47M14x (device id - * 0x5F) and LPC47B27x (device id 0x51) have fan control. - * The LPC47M15x and LPC47M192 chips "with hardware monitoring block" - * can do much more besides (device id 0x60). - */ - if (val == 0x51) - printk(KERN_INFO "smsc47m1: Found SMSC LPC47B27x\n"); - else if (val == 0x59) - printk(KERN_INFO "smsc47m1: Found SMSC LPC47M10x/LPC47M13x\n"); - else if (val == 0x5F) - printk(KERN_INFO "smsc47m1: Found SMSC LPC47M14x\n"); - else if (val == 0x60) - printk(KERN_INFO "smsc47m1: Found SMSC LPC47M15x/LPC47M192\n"); - else { - superio_exit(); - return -ENODEV; - } - - superio_select(); - *address = (superio_inb(SUPERIO_REG_BASE) << 8) - | superio_inb(SUPERIO_REG_BASE + 1); - val = superio_inb(SUPERIO_REG_ACT); - if (*address == 0 || (val & 0x01) == 0) { - printk(KERN_INFO "smsc47m1: Device is disabled, will not use\n"); - superio_exit(); - return -ENODEV; - } - - superio_exit(); - return 0; -} - -static int smsc47m1_detect(struct i2c_adapter *adapter, int address, int kind) -{ - struct i2c_client *new_client; - struct smsc47m1_data *data; - int err = 0; - int fan1, fan2, pwm1, pwm2; - - if (!i2c_is_isa_adapter(adapter)) { - return 0; - } - - if (!request_region(address, SMSC_EXTENT, smsc47m1_driver.name)) { - dev_err(&adapter->dev, "Region 0x%x already in use!\n", address); - return -EBUSY; - } - - if (!(data = kmalloc(sizeof(struct smsc47m1_data), GFP_KERNEL))) { - err = -ENOMEM; - goto error_release; - } - memset(data, 0x00, sizeof(struct smsc47m1_data)); - - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - init_MUTEX(&data->lock); - new_client->adapter = adapter; - new_client->driver = &smsc47m1_driver; - new_client->flags = 0; - - strlcpy(new_client->name, "smsc47m1", I2C_NAME_SIZE); - init_MUTEX(&data->update_lock); - - /* If no function is properly configured, there's no point in - actually registering the chip. */ - fan1 = (smsc47m1_read_value(new_client, SMSC47M1_REG_TPIN(0)) & 0x05) - == 0x05; - fan2 = (smsc47m1_read_value(new_client, SMSC47M1_REG_TPIN(1)) & 0x05) - == 0x05; - pwm1 = (smsc47m1_read_value(new_client, SMSC47M1_REG_PPIN(0)) & 0x05) - == 0x04; - pwm2 = (smsc47m1_read_value(new_client, SMSC47M1_REG_PPIN(1)) & 0x05) - == 0x04; - if (!(fan1 || fan2 || pwm1 || pwm2)) { - dev_warn(&new_client->dev, "Device is not configured, will not use\n"); - err = -ENODEV; - goto error_free; - } - - if ((err = i2c_attach_client(new_client))) - goto error_free; - - /* Some values (fan min, clock dividers, pwm registers) may be - needed before any update is triggered, so we better read them - at least once here. We don't usually do it that way, but in - this particular case, manually reading 5 registers out of 8 - doesn't make much sense and we're better using the existing - function. */ - smsc47m1_update_device(&new_client->dev, 1); - - if (fan1) { - device_create_file(&new_client->dev, &dev_attr_fan1_input); - device_create_file(&new_client->dev, &dev_attr_fan1_min); - device_create_file(&new_client->dev, &dev_attr_fan1_div); - } else - dev_dbg(&new_client->dev, "Fan 1 not enabled by hardware, " - "skipping\n"); - - if (fan2) { - device_create_file(&new_client->dev, &dev_attr_fan2_input); - device_create_file(&new_client->dev, &dev_attr_fan2_min); - device_create_file(&new_client->dev, &dev_attr_fan2_div); - } else - dev_dbg(&new_client->dev, "Fan 2 not enabled by hardware, " - "skipping\n"); - - if (pwm1) { - device_create_file(&new_client->dev, &dev_attr_pwm1); - device_create_file(&new_client->dev, &dev_attr_pwm1_enable); - } else - dev_dbg(&new_client->dev, "PWM 1 not enabled by hardware, " - "skipping\n"); - if (pwm2) { - device_create_file(&new_client->dev, &dev_attr_pwm2); - device_create_file(&new_client->dev, &dev_attr_pwm2_enable); - } else - dev_dbg(&new_client->dev, "PWM 2 not enabled by hardware, " - "skipping\n"); - - device_create_file(&new_client->dev, &dev_attr_alarms); - - return 0; - -error_free: - kfree(new_client); -error_release: - release_region(address, SMSC_EXTENT); - return err; -} - -static int smsc47m1_detach_client(struct i2c_client *client) -{ - int err; - - if ((err = i2c_detach_client(client))) { - dev_err(&client->dev, "Client deregistration failed, " - "client not detached.\n"); - return err; - } - - release_region(client->addr, SMSC_EXTENT); - kfree(i2c_get_clientdata(client)); - - return 0; -} - -static int smsc47m1_read_value(struct i2c_client *client, u8 reg) -{ - int res; - - down(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); - res = inb_p(client->addr + reg); - up(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); - return res; -} - -static void smsc47m1_write_value(struct i2c_client *client, u8 reg, u8 value) -{ - down(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); - outb_p(value, client->addr + reg); - up(&((struct smsc47m1_data *) i2c_get_clientdata(client))->lock); -} - -static struct smsc47m1_data *smsc47m1_update_device(struct device *dev, - int init) -{ - struct i2c_client *client = to_i2c_client(dev); - struct smsc47m1_data *data = i2c_get_clientdata(client); - - down(&data->update_lock); - - if (time_after(jiffies, data->last_updated + HZ + HZ / 2) || init) { - int i; - - for (i = 0; i < 2; i++) { - data->fan[i] = smsc47m1_read_value(client, - SMSC47M1_REG_FAN(i)); - data->fan_preload[i] = smsc47m1_read_value(client, - SMSC47M1_REG_FAN_PRELOAD(i)); - data->pwm[i] = smsc47m1_read_value(client, - SMSC47M1_REG_PWM(i)); - } - - i = smsc47m1_read_value(client, SMSC47M1_REG_FANDIV); - data->fan_div[0] = (i >> 4) & 0x03; - data->fan_div[1] = i >> 6; - - data->alarms = smsc47m1_read_value(client, - SMSC47M1_REG_ALARM) >> 6; - /* Clear alarms if needed */ - if (data->alarms) - smsc47m1_write_value(client, SMSC47M1_REG_ALARM, 0xC0); - - data->last_updated = jiffies; - } - - up(&data->update_lock); - return data; -} - -static int __init sm_smsc47m1_init(void) -{ - if (smsc47m1_find(normal_isa)) { - return -ENODEV; - } - - return i2c_add_driver(&smsc47m1_driver); -} - -static void __exit sm_smsc47m1_exit(void) -{ - i2c_del_driver(&smsc47m1_driver); -} - -MODULE_AUTHOR("Mark D. Studebaker <mdsxyz123@yahoo.com>"); -MODULE_DESCRIPTION("SMSC LPC47M1xx fan sensors driver"); -MODULE_LICENSE("GPL"); - -module_init(sm_smsc47m1_init); -module_exit(sm_smsc47m1_exit); |