Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * smsc47b397.c - Part of lm_sensors, Linux kernel modules
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * for hardware monitoring
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Supports the SMSC LPC47B397-NC Super-I/O chip.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Author/Maintainer: Mark M. Hoffman <mhoffman@lightlink.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Copyright (C) 2004 Utilitek Systems, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * derived in part from smsc47m1.c:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * Copyright (C) 2002 Mark D. Studebaker <mdsxyz123@yahoo.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * Copyright (C) 2004 Jean Delvare <jdelvare@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <linux/jiffies.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/hwmon.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/hwmon-sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) static unsigned short force_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) module_param(force_id, ushort, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) MODULE_PARM_DESC(force_id, "Override the detected device ID");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static struct platform_device *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define DRVNAME "smsc47b397"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) /* Super-I/0 registers and commands */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #define	REG	0x2e	/* The register to read/write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) #define	VAL	0x2f	/* The value to read/write */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static inline void superio_outb(int reg, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	outb(reg, REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	outb(val, VAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) static inline int superio_inb(int reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	outb(reg, REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	return inb(VAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) /* select superio logical device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static inline void superio_select(int ld)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	superio_outb(0x07, ld);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) static inline int superio_enter(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	if (!request_muxed_region(REG, 2, DRVNAME))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	outb(0x55, REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static inline void superio_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	outb(0xAA, REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	release_region(REG, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) #define SUPERIO_REG_DEVID	0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) #define SUPERIO_REG_DEVREV	0x21
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #define SUPERIO_REG_BASE_MSB	0x60
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) #define SUPERIO_REG_BASE_LSB	0x61
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #define SUPERIO_REG_LD8		0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) #define SMSC_EXTENT		0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) /* 0 <= nr <= 3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static u8 smsc47b397_reg_temp[] = {0x25, 0x26, 0x27, 0x80};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) #define SMSC47B397_REG_TEMP(nr)	(smsc47b397_reg_temp[(nr)])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) /* 0 <= nr <= 3 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) #define SMSC47B397_REG_FAN_LSB(nr) (0x28 + 2 * (nr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) #define SMSC47B397_REG_FAN_MSB(nr) (0x29 + 2 * (nr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) struct smsc47b397_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	unsigned short addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct mutex update_lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	unsigned long last_updated; /* in jiffies */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	int valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	/* register values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	u16 fan[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	u8 temp[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int smsc47b397_read_value(struct smsc47b397_data *data, u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	mutex_lock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	outb(reg, data->addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	res = inb_p(data->addr + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static struct smsc47b397_data *smsc47b397_update_device(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	struct smsc47b397_data *data = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	mutex_lock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		dev_dbg(dev, "starting device update...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		/* 4 temperature inputs, 4 fan inputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		for (i = 0; i < 4; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			data->temp[i] = smsc47b397_read_value(data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 					SMSC47B397_REG_TEMP(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			/* must read LSB first */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			data->fan[i]  = smsc47b397_read_value(data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 					SMSC47B397_REG_FAN_LSB(i));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 			data->fan[i] |= smsc47b397_read_value(data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 					SMSC47B397_REG_FAN_MSB(i)) << 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		data->last_updated = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		data->valid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		dev_dbg(dev, "... device update complete\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	mutex_unlock(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	return data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)  * TEMP: 0.001C/bit (-128C to +127C)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)  * REG: 1C/bit, two's complement
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static int temp_from_reg(u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	return (s8)reg * 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static ssize_t temp_show(struct device *dev, struct device_attribute *devattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			 char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	struct smsc47b397_data *data = smsc47b397_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	return sprintf(buf, "%d\n", temp_from_reg(data->temp[attr->index]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)  * FAN: 1 RPM/bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)  * REG: count of 90kHz pulses / revolution
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) static int fan_from_reg(u16 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	if (reg == 0 || reg == 0xffff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	return 90000 * 60 / reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 			char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	struct smsc47b397_data *data = smsc47b397_update_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	return sprintf(buf, "%d\n", fan_from_reg(data->fan[attr->index]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static struct attribute *smsc47b397_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	&sensor_dev_attr_temp1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	&sensor_dev_attr_temp2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	&sensor_dev_attr_temp3_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	&sensor_dev_attr_temp4_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	&sensor_dev_attr_fan1_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	&sensor_dev_attr_fan2_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	&sensor_dev_attr_fan3_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	&sensor_dev_attr_fan4_input.dev_attr.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) ATTRIBUTE_GROUPS(smsc47b397);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static int smsc47b397_probe(struct platform_device *pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) static struct platform_driver smsc47b397_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		.name	= DRVNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	.probe		= smsc47b397_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static int smsc47b397_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	struct smsc47b397_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	struct device *hwmon_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	if (!devm_request_region(dev, res->start, SMSC_EXTENT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 				 smsc47b397_driver.driver.name)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 			(unsigned long)res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 			(unsigned long)res->start + SMSC_EXTENT - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	data = devm_kzalloc(dev, sizeof(struct smsc47b397_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	data->addr = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	mutex_init(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	mutex_init(&data->update_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	hwmon_dev = devm_hwmon_device_register_with_groups(dev, "smsc47b397",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 							   data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 							   smsc47b397_groups);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	return PTR_ERR_OR_ZERO(hwmon_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) static int __init smsc47b397_device_add(unsigned short address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	struct resource res = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		.start	= address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		.end	= address + SMSC_EXTENT - 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		.name	= DRVNAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		.flags	= IORESOURCE_IO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	err = acpi_check_resource_conflict(&res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 		goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	pdev = platform_device_alloc(DRVNAME, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	if (!pdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		pr_err("Device allocation failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	err = platform_device_add_resources(pdev, &res, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		pr_err("Device resource addition failed (%d)\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		goto exit_device_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	err = platform_device_add(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		pr_err("Device addition failed (%d)\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		goto exit_device_put;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) exit_device_put:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	platform_device_put(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static int __init smsc47b397_find(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	u8 id, rev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	unsigned short addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	err = superio_enter();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	id = force_id ? force_id : superio_inb(SUPERIO_REG_DEVID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	switch (id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	case 0x81:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		name = "SCH5307-NS";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	case 0x6f:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		name = "LPC47B397-NC";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	case 0x85:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	case 0x8c:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 		name = "SCH5317";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		superio_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	rev = superio_inb(SUPERIO_REG_DEVREV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	superio_select(SUPERIO_REG_LD8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	addr = (superio_inb(SUPERIO_REG_BASE_MSB) << 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		 |  superio_inb(SUPERIO_REG_BASE_LSB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	pr_info("found SMSC %s (base address 0x%04x, revision %u)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		name, addr, rev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	superio_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	return addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) static int __init smsc47b397_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	unsigned short address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	ret = smsc47b397_find();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	address = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	ret = platform_driver_register(&smsc47b397_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	/* Sets global pdev as a side effect */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	ret = smsc47b397_device_add(address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		goto exit_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) exit_driver:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	platform_driver_unregister(&smsc47b397_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) static void __exit smsc47b397_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	platform_device_unregister(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	platform_driver_unregister(&smsc47b397_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) MODULE_DESCRIPTION("SMSC LPC47B397 driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) module_init(smsc47b397_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) module_exit(smsc47b397_exit);