Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / hwmon / lm63.c

diff --git a/qemu/roms/u-boot/drivers/hwmon/lm63.c b/qemu/roms/u-boot/drivers/hwmon/lm63.c
new file mode 100644 (file)
index 0000000..053c785
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/hwmon/lm63.c
@@ -0,0 +1,160 @@
+/*
+ * (C) Copyright 2007-2008
+ * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
+ * based on lm75.c by Bill Hunter
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*
+ * National LM63/LM64 Temperature Sensor
+ * Main difference: LM 64 has -16 Kelvin temperature offset
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <dtt.h>
+
+#define DTT_I2C_LM63_ADDR      0x4C    /* National LM63 device */
+
+#define DTT_READ_TEMP_RMT_MSB  0x01
+#define DTT_CONFIG             0x03
+#define DTT_READ_TEMP_RMT_LSB  0x10
+#define DTT_TACHLIM_LSB                0x48
+#define DTT_TACHLIM_MSB                0x49
+#define DTT_FAN_CONFIG         0x4A
+#define DTT_PWM_FREQ           0x4D
+#define DTT_PWM_LOOKUP_BASE    0x50
+
+struct pwm_lookup_entry {
+       u8 temp;
+       u8 pwm;
+};
+
+/*
+ * Device code
+ */
+
+int dtt_read(int sensor, int reg)
+{
+       int dlen;
+       uchar data[2];
+
+       /*
+        * Calculate sensor address and register.
+        */
+       if (!sensor)
+               sensor = DTT_I2C_LM63_ADDR;     /* legacy config */
+
+       dlen = 1;
+
+       /*
+        * Now try to read the register.
+        */
+       if (i2c_read(sensor, reg, 1, data, dlen) != 0)
+               return -1;
+
+       return (int)data[0];
+}                              /* dtt_read() */
+
+int dtt_write(int sensor, int reg, int val)
+{
+       int dlen;
+       uchar data[2];
+
+       /*
+        * Calculate sensor address and register.
+        */
+       if (!sensor)
+               sensor = DTT_I2C_LM63_ADDR;     /* legacy config */
+
+       dlen = 1;
+       data[0] = (char)(val & 0xff);
+
+       /*
+        * Write value to register.
+        */
+       if (i2c_write(sensor, reg, 1, data, dlen) != 0)
+               return 1;
+
+       return 0;
+}                              /* dtt_write() */
+
+static int is_lm64(int sensor)
+{
+       return sensor && (sensor != DTT_I2C_LM63_ADDR);
+}
+
+int dtt_init_one(int sensor)
+{
+       int i;
+       int val;
+
+       struct pwm_lookup_entry pwm_lookup[] = CONFIG_DTT_PWM_LOOKUPTABLE;
+
+       /*
+        * Set PWM Frequency to 2.5% resolution
+        */
+       val = 20;
+       if (dtt_write(sensor, DTT_PWM_FREQ, val) != 0)
+               return 1;
+
+       /*
+        * Set Tachometer Limit
+        */
+       val = CONFIG_DTT_TACH_LIMIT;
+       if (dtt_write(sensor, DTT_TACHLIM_LSB, val & 0xff) != 0)
+               return 1;
+       if (dtt_write(sensor, DTT_TACHLIM_MSB, (val >> 8) & 0xff) != 0)
+               return 1;
+
+       /*
+        * Make sure PWM Lookup-Table is writeable
+        */
+       if (dtt_write(sensor, DTT_FAN_CONFIG, 0x20) != 0)
+               return 1;
+
+       /*
+        * Setup PWM Lookup-Table
+        */
+       for (i = 0; i < ARRAY_SIZE(pwm_lookup); i++) {
+               int address = DTT_PWM_LOOKUP_BASE + 2 * i;
+               val = pwm_lookup[i].temp;
+               if (is_lm64(sensor))
+                       val -= 16;
+               if (dtt_write(sensor, address, val) != 0)
+                       return 1;
+               val = dtt_read(sensor, address);
+               val = pwm_lookup[i].pwm;
+               if (dtt_write(sensor, address + 1, val) != 0)
+                       return 1;
+       }
+
+       /*
+        * Enable PWM Lookup-Table, PWM Clock 360 kHz, Tachometer Mode 2
+        */
+       val = 0x02;
+       if (dtt_write(sensor, DTT_FAN_CONFIG, val) != 0)
+               return 1;
+
+       /*
+        * Enable Tach input
+        */
+       val = dtt_read(sensor, DTT_CONFIG) | 0x04;
+       if (dtt_write(sensor, DTT_CONFIG, val) != 0)
+               return 1;
+
+       return 0;
+}
+
+int dtt_get_temp(int sensor)
+{
+       s16 temp = (dtt_read(sensor, DTT_READ_TEMP_RMT_MSB) << 8)
+           | (dtt_read(sensor, DTT_READ_TEMP_RMT_LSB));
+
+       if (is_lm64(sensor))
+               temp += 16 << 8;
+
+       /* Ignore LSB for now, U-Boot only prints natural numbers */
+       return temp >> 8;
+}