1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <types.h>
4 #include <console/console.h>
5 #include <device/device.h>
6 #include <option.h>
7 #include <superio/hwm5_conf.h>
8 #include <superio/nuvoton/common/hwm.h>
9
10 #include "superio_hwm.h"
11
12 /* Hardware Monitor */
13
14 #define FAN_CRUISE_CONTROL_DISABLED 0
15 #define FAN_CRUISE_CONTROL_SPEED 1
16 #define FAN_CRUISE_CONTROL_THERMAL 2
17
18 #define FAN_SPEED_5625 0
19 //#define FAN_TEMPERATURE_30DEGC 0
20
21 #define HWM_BASE 0x290
22
23 struct fan_speed {
24 u8 fan_in;
25 u16 fan_speed;
26 };
27
28 // FANIN Target Speed Register
29 // FANIN = 337500 / RPM
30 struct fan_speed fan_speeds[] = {
31 { 0x3c, 5625 }, { 0x41, 5192 }, { 0x47, 4753 }, { 0x4e, 4326 },
32 { 0x56, 3924 }, { 0x5f, 3552 }, { 0x69, 3214 }, { 0x74, 2909 },
33 { 0x80, 2636 }, { 0x8d, 2393 }, { 0x9b, 2177 }, { 0xaa, 1985 },
34 { 0xba, 1814 }, { 0xcb, 1662 }, { 0xdd, 1527 }, { 0xf0, 1406 }
35 };
36
37 struct temperature {
38 u8 deg_celsius;
39 u8 deg_fahrenheit;
40 };
41
42 struct temperature temperatures[] = {
43 { 30, 86 }, { 33, 91 }, { 36, 96 }, { 39, 102 },
44 { 42, 107 }, { 45, 113 }, { 48, 118 }, { 51, 123 },
45 { 54, 129 }, { 57, 134 }, { 60, 140 }, { 63, 145 },
46 { 66, 150 }, { 69, 156 }, { 72, 161 }, { 75, 167 }
47 };
48
hwm_setup(void)49 void hwm_setup(void)
50 {
51 unsigned int cpufan_control = 0, sysfan_control = 0;
52 unsigned int cpufan_speed = 0, sysfan_speed = 0;
53 unsigned int cpufan_temperature = 0, sysfan_temperature = 0;
54
55 cpufan_control = get_uint_option("cpufan_cruise_control", FAN_CRUISE_CONTROL_DISABLED);
56 cpufan_speed = get_uint_option("cpufan_speed", FAN_SPEED_5625);
57 //cpufan_temperature = get_uint_option("cpufan_temperature", FAN_TEMPERATURE_30DEGC);
58
59 sysfan_control = get_uint_option("sysfan_cruise_control", FAN_CRUISE_CONTROL_DISABLED);
60 sysfan_speed = get_uint_option("sysfan_speed", FAN_SPEED_5625);
61 //sysfan_temperature = get_uint_option("sysfan_temperature", FAN_TEMPERATURE_30DEGC);
62
63 // pnp_write_hwm5_index(HWM_BASE, 0x31, 0x20); // AVCC high limit
64 // pnp_write_hwm5_index(HWM_BASE, 0x34, 0x06); // VIN2 low limit
65
66 nuvoton_hwm_select_bank(HWM_BASE, 0);
67 pnp_write_hwm5_index(HWM_BASE, 0x59, 0x20); // Diode Selection
68 pnp_write_hwm5_index(HWM_BASE, 0x5d, 0x0f); // All Sensors Diode, not Thermistor
69
70 nuvoton_hwm_select_bank(HWM_BASE, 4);
71 pnp_write_hwm5_index(HWM_BASE, 0x54, 0xf1); // SYSTIN temperature offset
72 pnp_write_hwm5_index(HWM_BASE, 0x55, 0x19); // CPUTIN temperature offset
73 pnp_write_hwm5_index(HWM_BASE, 0x56, 0xfc); // AUXTIN temperature offset
74
75 nuvoton_hwm_select_bank(HWM_BASE, 0x80); // Default
76
77 u8 fan_config = 0;
78 // 00 FANOUT is Manual Mode
79 // 01 FANOUT is Thermal Cruise Mode
80 // 10 FANOUT is Fan Speed Cruise Mode
81 switch (cpufan_control) {
82 case FAN_CRUISE_CONTROL_SPEED: fan_config |= (2 << 4); break;
83 case FAN_CRUISE_CONTROL_THERMAL: fan_config |= (1 << 4); break;
84 }
85 switch (sysfan_control) {
86 case FAN_CRUISE_CONTROL_SPEED: fan_config |= (2 << 2); break;
87 case FAN_CRUISE_CONTROL_THERMAL: fan_config |= (1 << 2); break;
88 }
89 // This register must be written first
90 pnp_write_hwm5_index(HWM_BASE, 0x04, fan_config);
91
92 switch (cpufan_control) {
93 case FAN_CRUISE_CONTROL_SPEED: /* CPUFANIN target speed */
94 printk(BIOS_DEBUG, "Fan Cruise Control setting CPU fan to %d RPM\n",
95 fan_speeds[cpufan_speed].fan_speed);
96 pnp_write_hwm5_index(HWM_BASE, 0x06, fan_speeds[cpufan_speed].fan_in);
97 break;
98 case FAN_CRUISE_CONTROL_THERMAL: /* CPUFANIN target temperature */
99 printk(BIOS_DEBUG, "Fan Cruise Control setting CPU fan to activation at %d deg C/%d deg F\n",
100 temperatures[cpufan_temperature].deg_celsius,
101 temperatures[cpufan_temperature].deg_fahrenheit);
102 pnp_write_hwm5_index(HWM_BASE, 0x06,
103 temperatures[cpufan_temperature].deg_celsius);
104 break;
105 }
106
107 switch (sysfan_control) {
108 case FAN_CRUISE_CONTROL_SPEED: /* SYSFANIN target speed */
109 printk(BIOS_DEBUG, "Fan Cruise Control setting system fan to %d RPM\n",
110 fan_speeds[sysfan_speed].fan_speed);
111 pnp_write_hwm5_index(HWM_BASE, 0x05, fan_speeds[sysfan_speed].fan_in);
112 break;
113 case FAN_CRUISE_CONTROL_THERMAL: /* SYSFANIN target temperature */
114 printk(BIOS_DEBUG, "Fan Cruise Control setting system fan to activation at %d deg C/%d deg F\n",
115 temperatures[sysfan_temperature].deg_celsius,
116 temperatures[sysfan_temperature].deg_fahrenheit);
117 pnp_write_hwm5_index(HWM_BASE,
118 0x05, temperatures[sysfan_temperature].deg_celsius);
119 break;
120 }
121
122 pnp_write_hwm5_index(HWM_BASE, 0x0e, 0x02); // Fan Output Step Down Time
123 pnp_write_hwm5_index(HWM_BASE, 0x0f, 0x02); // Fan Output Step Up Time
124
125 pnp_write_hwm5_index(HWM_BASE, 0x47, 0xaf); // FAN divisor register
126 pnp_write_hwm5_index(HWM_BASE, 0x4b, 0x84); // AUXFANIN speed divisor
127
128 pnp_write_hwm5_index(HWM_BASE, 0x40, 0x01); // Init, but no SMI#
129 }
130