// SPDX-License-Identifier: GPL-2.0-only/* envctrl.c: Temperature and Fan monitoring on Machines providing it. * * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) * Copyright (C) 2000 Vinh Truong (vinh.truong@eng.sun.com) * VT - The implementation is to support Sun Microelectronics (SME) platform * environment monitoring. SME platforms use pcf8584 as the i2c bus * controller to access pcf8591 (8-bit A/D and D/A converter) and * pcf8571 (256 x 8-bit static low-voltage RAM with I2C-bus interface). * At board level, it follows SME Firmware I2C Specification. Reference: * http://www-eu2.semiconductors.com/pip/PCF8584P * http://www-eu2.semiconductors.com/pip/PCF8574AP * http://www-eu2.semiconductors.com/pip/PCF8591P * * EB - Added support for CP1500 Global Address and PS/Voltage monitoring. * Eric Brower <ebrower@usa.net> * * DB - Audit every copy_to_user in envctrl_read. * Daniele Bellucci <bellucda@tiscali.it> */ #include <linux/module.h>#include <linux/kthread.h>#include <linux/delay.h>#include <linux/ioport.h>#include <linux/miscdevice.h>#include <linux/kmod.h>#include <linux/reboot.h>#include <linux/slab.h>#include <linux/of.h>#include <linux/platform_device.h> #include <linux/uaccess.h>#include <asm/envctrl.h>#include <asm/io.h> #define DRIVER_NAME "envctrl"#define PFX DRIVER_NAME ": " #define PCF8584_ADDRESS 0x55 #define CONTROL_PIN 0x80#define CONTROL_ES0 0x40#define CONTROL_ES1 0x20#define CONTROL_ES2 0x10#define CONTROL_ENI 0x08#define CONTROL_STA 0x04#define CONTROL_STO 0x02#define CONTROL_ACK 0x01 #define STATUS_PIN 0x80#define STATUS_STS 0x20#define STATUS_BER 0x10#define STATUS_LRB 0x08#define STATUS_AD0 0x08#define STATUS_AAB 0x04#define STATUS_LAB 0x02#define STATUS_BB 0x01 /* * CLK Mode Register. */#define BUS_CLK_90 0x00#define BUS_CLK_45 0x01#define BUS_CLK_11 0x02#define BUS_CLK_1_5 0x03 #define CLK_3 0x00#define CLK_4_43 0x10#define CLK_6 0x14#define CLK_8 0x18#define CLK_12 0x1c #define OBD_SEND_START 0xc5 /* value to generate I2c_bus START condition */#define OBD_SEND_STOP 0xc3 /* value to generate I2c_bus STOP condition */ /* Monitor type of i2c child device. * Firmware definitions. */#define PCF8584_MAX_CHANNELS 8#define PCF8584_GLOBALADDR_TYPE 6 /* global address monitor */#define PCF8584_FANSTAT_TYPE 3 /* fan status monitor */#define PCF8584_VOLTAGE_TYPE 2 /* voltage monitor */#define PCF8584_TEMP_TYPE 1 /* temperature monitor*/ /* Monitor type of i2c child device. * Driver definitions. */#define ENVCTRL_NOMON 0#define ENVCTRL_CPUTEMP_MON 1 /* cpu temperature monitor */#define ENVCTRL_CPUVOLTAGE_MON 2 /* voltage monitor */#define ENVCTRL_FANSTAT_MON 3 /* fan status monitor */#define ENVCTRL_ETHERTEMP_MON 4 /* ethernet temperature */ /* monitor */#define ENVCTRL_VOLTAGESTAT_MON 5 /* voltage status monitor */#define ENVCTRL_MTHRBDTEMP_MON 6 /* motherboard temperature */#define ENVCTRL_SCSITEMP_MON 7 /* scsi temperature */#define ENVCTRL_GLOBALADDR_MON 8 /* global address */ /* Child device type. * Driver definitions. */#define I2C_ADC 0 /* pcf8591 */#define I2C_GPIO 1 /* pcf8571 */ /* Data read from child device may need to decode * through a data table and a scale. * Translation type as defined by firmware. */#define ENVCTRL_TRANSLATE_NO 0#define ENVCTRL_TRANSLATE_PARTIAL 1#define ENVCTRL_TRANSLATE_COMBINED 2#define ENVCTRL_TRANSLATE_FULL 3 /* table[data] */#define ENVCTRL_TRANSLATE_SCALE 4 /* table[data]/scale */ /* Driver miscellaneous definitions. */#define ENVCTRL_MAX_CPU 4#define CHANNEL_DESC_SZ 256 /* Mask values for combined GlobalAddress/PowerStatus node */#define ENVCTRL_GLOBALADDR_ADDR_MASK 0x1F#define ENVCTRL_GLOBALADDR_PSTAT_MASK 0x60 /* Node 0x70 ignored on CompactPCI CP1400/1500 platforms * (see envctrl_init_i2c_child) */#define ENVCTRL_CPCI_IGNORED_NODE 0x70 #define PCF8584_DATA 0x00#define PCF8584_CSR 0x01 /* Each child device can be monitored by up to PCF8584_MAX_CHANNELS. * Property of a port or channel as defined by the firmware. */struct pcf8584_channel { unsigned char chnl_no; unsigned char io_direction; unsigned char type; unsigned char last;}; /* Each child device may have one or more tables of bytes to help decode * data. Table property as defined by the firmware. */ struct pcf8584_tblprop { unsigned int type; unsigned int scale; unsigned int offset; /* offset from the beginning of the table */ unsigned int size;}; /* i2c child */struct i2c_child_t { /* Either ADC or GPIO. */ unsigned char i2ctype; unsigned long addr; struct pcf8584_channel chnl_array[PCF8584_MAX_CHANNELS]; /* Channel info. */ unsigned int total_chnls; /* Number of monitor channels. */ unsigned char fan_mask; /* Byte mask for fan status channels. */ unsigned char voltage_mask; /* Byte mask for voltage status channels. */ struct pcf8584_tblprop tblprop_array[PCF8584_MAX_CHANNELS]; /* Properties of all monitor channels. */ unsigned int total_tbls; /* Number of monitor tables. */ char *tables; /* Pointer to table(s). */ char chnls_desc[CHANNEL_DESC_SZ]; /* Channel description. */ char mon_type[PCF8584_MAX_CHANNELS];}; static void __iomem *i2c;static struct i2c_child_t i2c_childlist[ENVCTRL_MAX_CPU*2];static unsigned char chnls_mask[] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 };static unsigned int warning_temperature = 0;static unsigned int shutdown_temperature = 0;static char read_cpu; /* Forward declarations. */static struct i2c_child_t *envctrl_get_i2c_child(unsigned char); /* Function Description: Test the PIN bit (Pending Interrupt Not) * to test when serial transmission is completed . * Return : None. */static void envtrl_i2c_test_pin(void){ int limit = 1000000; while (--limit > 0) { if (!(readb(i2c + PCF8584_CSR) & STATUS_PIN)) break; udelay(1); } if (limit <= 0) printk(KERN_INFO PFX "Pin status will not clear.\n");} /* Function Description: Test busy bit. * Return : None. */static void envctrl_i2c_test_bb(void){ int limit = 1000000; while (--limit > 0) { /* Busy bit 0 means busy. */ if (readb(i2c + PCF8584_CSR) & STATUS_BB) break; udelay(1); } if (limit <= 0) printk(KERN_INFO PFX "Busy bit will not clear.\n");} /* Function Description: Send the address for a read access. * Return : 0 if not acknowledged, otherwise acknowledged. */static int envctrl_i2c_read_addr(unsigned char addr){ envctrl_i2c_test_bb(); /* Load address. */ writeb(addr + 1, i2c + PCF8584_DATA); envctrl_i2c_test_bb(); writeb(OBD_SEND_START, i2c + PCF8584_CSR); /* Wait for PIN. */ envtrl_i2c_test_pin(); /* CSR 0 means acknowledged. */ if (!(readb(i2c + PCF8584_CSR) & STATUS_LRB)) { return readb(i2c + PCF8584_DATA); } else { writeb(OBD_SEND_STOP, i2c + PCF8584_CSR); return 0; }} /* Function Description: Send the address for write mode. * Return : None. */static void envctrl_i2c_write_addr(unsigned char addr){ envctrl_i2c_test_bb(); writeb(addr, i2c + PCF8584_DATA); /* Generate Start condition. */ writeb(OBD_SEND_START, i2c + PCF8584_CSR);} /* Function Description: Read 1 byte of data from addr * set by envctrl_i2c_read_addr() * Return : Data from address set by envctrl_i2c_read_addr(). */static unsigned char envctrl_i2c_read_data(void){ envtrl_i2c_test_pin(); writeb(CONTROL_ES0, i2c + PCF8584_CSR); /* Send neg ack. */ return readb(i2c + PCF8584_DATA);} /* Function Description: Instruct the device which port to read data from. * Return : None. */static void envctrl_i2c_write_data(unsigned char port){ envtrl_i2c_test_pin(); writeb(port, i2c + PCF8584_DATA);} /* Function Description: Generate Stop condition after last byte is sent. * Return : None. */static void envctrl_i2c_stop(void){ envtrl_i2c_test_pin(); writeb(OBD_SEND_STOP, i2c + PCF8584_CSR);} /* Function Description: Read adc device. * Return : Data at address and port. */static unsigned char envctrl_i2c_read_8591(unsigned char addr, unsigned char port){ /* Send address. */ envctrl_i2c_write_addr(addr); /* Setup port to read. */ envctrl_i2c_write_data(port); envctrl_i2c_stop(); /* Read port. */ envctrl_i2c_read_addr(addr); /* Do a single byte read and send stop. */ envctrl_i2c_read_data(); envctrl_i2c_stop(); return readb(i2c + PCF8584_DATA);} /* Function Description: Read gpio device. * Return : Data at address. */static unsigned char envctrl_i2c_read_8574(unsigned char addr){ unsigned char rd; envctrl_i2c_read_addr(addr); /* Do a single byte read and send stop. */ rd = envctrl_i2c_read_data(); envctrl_i2c_stop(); return rd;} /* Function Description: Decode data read from an adc device using firmware * table. * Return: Number of read bytes. Data is stored in bufdata in ascii format. */static int envctrl_i2c_data_translate(unsigned char data, int translate_type, int scale, char *tbl, char *bufdata){ int len = 0; switch (translate_type) { case ENVCTRL_TRANSLATE_NO: /* No decode necessary. */ len = 1; bufdata[0] = data; break; case ENVCTRL_TRANSLATE_FULL: /* Decode this way: data = table[data]. */ len = 1; bufdata[0] = tbl[data]; break; case ENVCTRL_TRANSLATE_SCALE: /* Decode this way: data = table[data]/scale */ sprintf(bufdata,"%d ", (tbl[data] * 10) / (scale)); len = strlen(bufdata); bufdata[len - 1] = bufdata[len - 2]; bufdata[len - 2] = '.'; break; default: break; } return len;} /* Function Description: Read cpu-related data such as cpu temperature, voltage. * Return: Number of read bytes. Data is stored in bufdata in ascii format. */static int envctrl_read_cpu_info(int cpu, struct i2c_child_t *pchild, char mon_type, unsigned char *bufdata){ unsigned char data; int i, j = -1; char *tbl; /* Find the right monitor type and channel. */ for (i = 0; i < PCF8584_MAX_CHANNELS; i++) { if (pchild->mon_type[i] == mon_type) { if (++j == cpu) { break; } } } if (j != cpu) return 0; /* Read data from address and port. */ data = envctrl_i2c_read_8591((unsigned char)pchild->addr, (unsigned char)pchild->chnl_array[i].chnl_no); /* Find decoding table. */ tbl = pchild->tables + pchild->tblprop_array[i].offset; return envctrl_i2c_data_translate(data, pchild->tblprop_array[i].type, pchild->tblprop_array[i].scale, tbl, bufdata);} /* Function Description: Read noncpu-related data such as motherboard * temperature. * Return: Number of read bytes. Data is stored in bufdata in ascii format. */static int envctrl_read_noncpu_info(struct i2c_child_t *pchild, char mon_type, unsigned char *bufdata){ unsigned char data; int i; char *tbl = NULL; for (i = 0; i < PCF8584_MAX_CHANNELS; i++) { if (pchild->mon_type[i] == mon_type) break; } if (i >= PCF8584_MAX_CHANNELS) return 0; /* Read data from address and port. */ data = envctrl_i2c_read_8591((unsigned char)pchild->addr, (unsigned char)pchild->chnl_array[i].chnl_no); /* Find decoding table. */ tbl = pchild->tables + pchild->tblprop_array[i].offset; return envctrl_i2c_data_translate(data, pchild->tblprop_array[i].type, pchild->tblprop_array[i].scale, tbl, bufdata);} /* Function Description: Read fan status. * Return : Always 1 byte. Status stored in bufdata. */static int envctrl_i2c_fan_status(struct i2c_child_t *pchild, unsigned char data, char *bufdata){ unsigned char tmp, ret = 0; int i, j = 0; tmp = data & pchild->fan_mask; if (tmp == pchild->fan_mask) { /* All bits are on. All fans are functioning. */ ret = ENVCTRL_ALL_FANS_GOOD; } else if (tmp == 0) { /* No bits are on. No fans are functioning. */ ret = ENVCTRL_ALL_FANS_BAD; } else { /* Go through all channels, mark 'on' the matched bits. * Notice that fan_mask may have discontiguous bits but * return mask are always contiguous. For example if we * monitor 4 fans at channels 0,1,2,4, the return mask * should be 00010000 if only fan at channel 4 is working. */ for (i = 0; i < PCF8584_MAX_CHANNELS;i++) { if (pchild->fan_mask & chnls_mask[i]) { if (!(chnls_mask[i] & tmp)) ret |= chnls_mask[j]; j++; } } } bufdata[0] = ret; return 1;} /* Function Description: Read global addressing line. * Return : Always 1 byte. Status stored in bufdata. */static int envctrl_i2c_globaladdr(struct i2c_child_t *pchild, unsigned char data, char *bufdata){ /* Translatation table is not necessary, as global * addr is the integer value of the GA# bits. * * NOTE: MSB is documented as zero, but I see it as '1' always.... * * ----------------------------------------------- * | 0 | FAL | DEG | GA4 | GA3 | GA2 | GA1 | GA0 | * ----------------------------------------------- * GA0 - GA4 integer value of Global Address (backplane slot#) * DEG 0 = cPCI Power supply output is starting to degrade * 1 = cPCI Power supply output is OK * FAL 0 = cPCI Power supply has failed * 1 = cPCI Power supply output is OK */ bufdata[0] = (data & ENVCTRL_GLOBALADDR_ADDR_MASK); return 1;} /* Function Description: Read standard voltage and power supply status. * Return : Always 1 byte. Status stored in bufdata. */static unsigned char envctrl_i2c_voltage_status(struct i2c_child_t *pchild, unsigned char data, char *bufdata){ unsigned char tmp, ret = 0; int i, j = 0; tmp = data & pchild->voltage_mask; /* Two channels are used to monitor voltage and power supply. */Lines 1–500 of 1134. Load more
// SPDX-License-Identifier: GPL-2.0-only /* envctrl.c: Temperature and Fan monitoring on Machines providing it. * * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) * Copyright (C) 2000 Vinh Truong (vinh.truong@eng.sun.com) * VT - The implementation is to support Sun Microelectronics (SME) platform * environment monitoring. SME platforms use pcf8584 as the i2c bus * controller to access pcf8591 (8-bit A/D and D/A converter) and * pcf8571 (256 x 8-bit static low-voltage RAM with I2C-bus interface). * At board level, it follows SME Firmware I2C Specification. Reference: * http://www-eu2.semiconductors.com/pip/PCF8584P * http://www-eu2.semiconductors.com/pip/PCF8574AP * http://www-eu2.semiconductors.com/pip/PCF8591P * * EB - Added support for CP1500 Global Address and PS/Voltage monitoring. * Eric Brower <ebrower@usa.net> * * DB - Audit every copy_to_user in envctrl_read. * Daniele Bellucci <bellucda@tiscali.it> */ #include <linux/module.h> #include <linux/kthread.h> #include <linux/delay.h> #include <linux/ioport.h> #include <linux/miscdevice.h> #include <linux/kmod.h> #include <linux/reboot.h> #include <linux/slab.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/uaccess.h> #include <asm/envctrl.h> #include <asm/io.h> #define DRIVER_NAME "envctrl" #define PFX DRIVER_NAME ": " #define PCF8584_ADDRESS 0x55 #define CONTROL_PIN 0x80 #define CONTROL_ES0 0x40 #define CONTROL_ES1 0x20 #define CONTROL_ES2 0x10 #define CONTROL_ENI 0x08 #define CONTROL_STA 0x04 #define CONTROL_STO 0x02 #define CONTROL_ACK 0x01 #define STATUS_PIN 0x80 #define STATUS_STS 0x20 #define STATUS_BER 0x10 #define STATUS_LRB 0x08 #define STATUS_AD0 0x08 #define STATUS_AAB 0x04 #define STATUS_LAB 0x02 #define STATUS_BB 0x01 /* * CLK Mode Register. */ #define BUS_CLK_90 0x00 #define BUS_CLK_45 0x01 #define BUS_CLK_11 0x02 #define BUS_CLK_1_5 0x03 #define CLK_3 0x00 #define CLK_4_43 0x10 #define CLK_6 0x14 #define CLK_8 0x18 #define CLK_12 0x1c #define OBD_SEND_START 0xc5 /* value to generate I2c_bus START condition */ #define OBD_SEND_STOP 0xc3 /* value to generate I2c_bus STOP condition */ /* Monitor type of i2c child device. * Firmware definitions. */ #define PCF8584_MAX_CHANNELS 8 #define PCF8584_GLOBALADDR_TYPE 6 /* global address monitor */ #define PCF8584_FANSTAT_TYPE 3 /* fan status monitor */ #define PCF8584_VOLTAGE_TYPE 2 /* voltage monitor */ #define PCF8584_TEMP_TYPE 1 /* temperature monitor*/ /* Monitor type of i2c child device. * Driver definitions. */ #define ENVCTRL_NOMON 0 #define ENVCTRL_CPUTEMP_MON 1 /* cpu temperature monitor */ #define ENVCTRL_CPUVOLTAGE_MON 2 /* voltage monitor */ #define ENVCTRL_FANSTAT_MON 3 /* fan status monitor */ #define ENVCTRL_ETHERTEMP_MON 4 /* ethernet temperature */ /* monitor */ #define ENVCTRL_VOLTAGESTAT_MON 5 /* voltage status monitor */ #define ENVCTRL_MTHRBDTEMP_MON 6 /* motherboard temperature */ #define ENVCTRL_SCSITEMP_MON 7 /* scsi temperature */ #define ENVCTRL_GLOBALADDR_MON 8 /* global address */ /* Child device type. * Driver definitions. */ #define I2C_ADC 0 /* pcf8591 */ #define I2C_GPIO 1 /* pcf8571 */ /* Data read from child device may need to decode * through a data table and a scale. * Translation type as defined by firmware. */ #define ENVCTRL_TRANSLATE_NO 0 #define ENVCTRL_TRANSLATE_PARTIAL 1 #define ENVCTRL_TRANSLATE_COMBINED 2 #define ENVCTRL_TRANSLATE_FULL 3 /* table[data] */ #define ENVCTRL_TRANSLATE_SCALE 4 /* table[data]/scale */ /* Driver miscellaneous definitions. */ #define ENVCTRL_MAX_CPU 4 #define CHANNEL_DESC_SZ 256 /* Mask values for combined GlobalAddress/PowerStatus node */ #define ENVCTRL_GLOBALADDR_ADDR_MASK 0x1F #define ENVCTRL_GLOBALADDR_PSTAT_MASK 0x60 /* Node 0x70 ignored on CompactPCI CP1400/1500 platforms * (see envctrl_init_i2c_child) */ #define ENVCTRL_CPCI_IGNORED_NODE 0x70 #define PCF8584_DATA 0x00 #define PCF8584_CSR 0x01 /* Each child device can be monitored by up to PCF8584_MAX_CHANNELS. * Property of a port or channel as defined by the firmware. */ struct pcf8584_channel { unsigned char chnl_no; unsigned char io_direction; unsigned char type; unsigned char last; }; /* Each child device may have one or more tables of bytes to help decode * data. Table property as defined by the firmware. */ struct pcf8584_tblprop { unsigned int type; unsigned int scale; unsigned int offset; /* offset from the beginning of the table */ unsigned int size; }; /* i2c child */ struct i2c_child_t { /* Either ADC or GPIO. */ unsigned char i2ctype; unsigned long addr; struct pcf8584_channel chnl_array[PCF8584_MAX_CHANNELS]; /* Channel info. */ unsigned int total_chnls; /* Number of monitor channels. */ unsigned char fan_mask; /* Byte mask for fan status channels. */ unsigned char voltage_mask; /* Byte mask for voltage status channels. */ struct pcf8584_tblprop tblprop_array[PCF8584_MAX_CHANNELS]; /* Properties of all monitor channels. */ unsigned int total_tbls; /* Number of monitor tables. */ char *tables; /* Pointer to table(s). */ char chnls_desc[CHANNEL_DESC_SZ]; /* Channel description. */ char mon_type[PCF8584_MAX_CHANNELS]; }; static void __iomem *i2c; static struct i2c_child_t i2c_childlist[ENVCTRL_MAX_CPU*2]; static unsigned char chnls_mask[] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 }; static unsigned int warning_temperature = 0; static unsigned int shutdown_temperature = 0; static char read_cpu; /* Forward declarations. */ static struct i2c_child_t *envctrl_get_i2c_child(unsigned char); /* Function Description: Test the PIN bit (Pending Interrupt Not) * to test when serial transmission is completed . * Return : None. */ static void envtrl_i2c_test_pin(void) { int limit = 1000000; while (--limit > 0) { if (!(readb(i2c + PCF8584_CSR) & STATUS_PIN)) break; udelay(1); } if (limit <= 0) printk(KERN_INFO PFX "Pin status will not clear.\n"); } /* Function Description: Test busy bit. * Return : None. */ static void envctrl_i2c_test_bb(void) { int limit = 1000000; while (--limit > 0) { /* Busy bit 0 means busy. */ if (readb(i2c + PCF8584_CSR) & STATUS_BB) break; udelay(1); } if (limit <= 0) printk(KERN_INFO PFX "Busy bit will not clear.\n"); } /* Function Description: Send the address for a read access. * Return : 0 if not acknowledged, otherwise acknowledged. */ static int envctrl_i2c_read_addr(unsigned char addr) { envctrl_i2c_test_bb(); /* Load address. */ writeb(addr + 1, i2c + PCF8584_DATA); envctrl_i2c_test_bb(); writeb(OBD_SEND_START, i2c + PCF8584_CSR); /* Wait for PIN. */ envtrl_i2c_test_pin(); /* CSR 0 means acknowledged. */ if (!(readb(i2c + PCF8584_CSR) & STATUS_LRB)) { return readb(i2c + PCF8584_DATA); } else { writeb(OBD_SEND_STOP, i2c + PCF8584_CSR); return 0; } } /* Function Description: Send the address for write mode. * Return : None. */ static void envctrl_i2c_write_addr(unsigned char addr) { envctrl_i2c_test_bb(); writeb(addr, i2c + PCF8584_DATA); /* Generate Start condition. */ writeb(OBD_SEND_START, i2c + PCF8584_CSR); } /* Function Description: Read 1 byte of data from addr * set by envctrl_i2c_read_addr() * Return : Data from address set by envctrl_i2c_read_addr(). */ static unsigned char envctrl_i2c_read_data(void) { envtrl_i2c_test_pin(); writeb(CONTROL_ES0, i2c + PCF8584_CSR); /* Send neg ack. */ return readb(i2c + PCF8584_DATA); } /* Function Description: Instruct the device which port to read data from. * Return : None. */ static void envctrl_i2c_write_data(unsigned char port) { envtrl_i2c_test_pin(); writeb(port, i2c + PCF8584_DATA); } /* Function Description: Generate Stop condition after last byte is sent. * Return : None. */ static void envctrl_i2c_stop(void) { envtrl_i2c_test_pin(); writeb(OBD_SEND_STOP, i2c + PCF8584_CSR); } /* Function Description: Read adc device. * Return : Data at address and port. */ static unsigned char envctrl_i2c_read_8591(unsigned char addr, unsigned char port) { /* Send address. */ envctrl_i2c_write_addr(addr); /* Setup port to read. */ envctrl_i2c_write_data(port); envctrl_i2c_stop(); /* Read port. */ envctrl_i2c_read_addr(addr); /* Do a single byte read and send stop. */ envctrl_i2c_read_data(); envctrl_i2c_stop(); return readb(i2c + PCF8584_DATA); } /* Function Description: Read gpio device. * Return : Data at address. */ static unsigned char envctrl_i2c_read_8574(unsigned char addr) { unsigned char rd; envctrl_i2c_read_addr(addr); /* Do a single byte read and send stop. */ rd = envctrl_i2c_read_data(); envctrl_i2c_stop(); return rd; } /* Function Description: Decode data read from an adc device using firmware * table. * Return: Number of read bytes. Data is stored in bufdata in ascii format. */ static int envctrl_i2c_data_translate(unsigned char data, int translate_type, int scale, char *tbl, char *bufdata) { int len = 0; switch (translate_type) { case ENVCTRL_TRANSLATE_NO: /* No decode necessary. */ len = 1; bufdata[0] = data; break; case ENVCTRL_TRANSLATE_FULL: /* Decode this way: data = table[data]. */ len = 1; bufdata[0] = tbl[data]; break; case ENVCTRL_TRANSLATE_SCALE: /* Decode this way: data = table[data]/scale */ sprintf(bufdata,"%d ", (tbl[data] * 10) / (scale)); len = strlen(bufdata); bufdata[len - 1] = bufdata[len - 2]; bufdata[len - 2] = '.'; break; default: break; } return len; } /* Function Description: Read cpu-related data such as cpu temperature, voltage. * Return: Number of read bytes. Data is stored in bufdata in ascii format. */ static int envctrl_read_cpu_info(int cpu, struct i2c_child_t *pchild, char mon_type, unsigned char *bufdata) { unsigned char data; int i, j = -1; char *tbl; /* Find the right monitor type and channel. */ for (i = 0; i < PCF8584_MAX_CHANNELS; i++) { if (pchild->mon_type[i] == mon_type) { if (++j == cpu) { break; } } } if (j != cpu) return 0; /* Read data from address and port. */ data = envctrl_i2c_read_8591((unsigned char)pchild->addr, (unsigned char)pchild->chnl_array[i].chnl_no); /* Find decoding table. */ tbl = pchild->tables + pchild->tblprop_array[i].offset; return envctrl_i2c_data_translate(data, pchild->tblprop_array[i].type, pchild->tblprop_array[i].scale, tbl, bufdata); } /* Function Description: Read noncpu-related data such as motherboard * temperature. * Return: Number of read bytes. Data is stored in bufdata in ascii format. */ static int envctrl_read_noncpu_info(struct i2c_child_t *pchild, char mon_type, unsigned char *bufdata) { unsigned char data; int i; char *tbl = NULL; for (i = 0; i < PCF8584_MAX_CHANNELS; i++) { if (pchild->mon_type[i] == mon_type) break; } if (i >= PCF8584_MAX_CHANNELS) return 0; /* Read data from address and port. */ data = envctrl_i2c_read_8591((unsigned char)pchild->addr, (unsigned char)pchild->chnl_array[i].chnl_no); /* Find decoding table. */ tbl = pchild->tables + pchild->tblprop_array[i].offset; return envctrl_i2c_data_translate(data, pchild->tblprop_array[i].type, pchild->tblprop_array[i].scale, tbl, bufdata); } /* Function Description: Read fan status. * Return : Always 1 byte. Status stored in bufdata. */ static int envctrl_i2c_fan_status(struct i2c_child_t *pchild, unsigned char data, char *bufdata) { unsigned char tmp, ret = 0; int i, j = 0; tmp = data & pchild->fan_mask; if (tmp == pchild->fan_mask) { /* All bits are on. All fans are functioning. */ ret = ENVCTRL_ALL_FANS_GOOD; } else if (tmp == 0) { /* No bits are on. No fans are functioning. */ ret = ENVCTRL_ALL_FANS_BAD; } else { /* Go through all channels, mark 'on' the matched bits. * Notice that fan_mask may have discontiguous bits but * return mask are always contiguous. For example if we * monitor 4 fans at channels 0,1,2,4, the return mask * should be 00010000 if only fan at channel 4 is working. */ for (i = 0; i < PCF8584_MAX_CHANNELS;i++) { if (pchild->fan_mask & chnls_mask[i]) { if (!(chnls_mask[i] & tmp)) ret |= chnls_mask[j]; j++; } } } bufdata[0] = ret; return 1; } /* Function Description: Read global addressing line. * Return : Always 1 byte. Status stored in bufdata. */ static int envctrl_i2c_globaladdr(struct i2c_child_t *pchild, unsigned char data, char *bufdata) { /* Translatation table is not necessary, as global * addr is the integer value of the GA# bits. * * NOTE: MSB is documented as zero, but I see it as '1' always.... * * ----------------------------------------------- * | 0 | FAL | DEG | GA4 | GA3 | GA2 | GA1 | GA0 | * ----------------------------------------------- * GA0 - GA4 integer value of Global Address (backplane slot#) * DEG 0 = cPCI Power supply output is starting to degrade * 1 = cPCI Power supply output is OK * FAL 0 = cPCI Power supply has failed * 1 = cPCI Power supply output is OK */ bufdata[0] = (data & ENVCTRL_GLOBALADDR_ADDR_MASK); return 1; } /* Function Description: Read standard voltage and power supply status. * Return : Always 1 byte. Status stored in bufdata. */ static unsigned char envctrl_i2c_voltage_status(struct i2c_child_t *pchild, unsigned char data, char *bufdata) { unsigned char tmp, ret = 0; int i, j = 0; tmp = data & pchild->voltage_mask; /* Two channels are used to monitor voltage and power supply. */