xref: /aosp_15_r20/external/coreboot/src/ec/lenovo/pmh7/pmh7.c (revision b9411a12aaaa7e1e6a6fb7c5e057f44ee179a49c)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 
3 #include <arch/io.h>
4 #include <console/console.h>
5 #include <device/device.h>
6 #include <device/pnp.h>
7 #include <option.h>
8 #include <delay.h>
9 #include <types.h>
10 
11 #include "pmh7.h"
12 #include "chip.h"
13 
pmh7_backlight_enable(int onoff)14 void pmh7_backlight_enable(int onoff)
15 {
16 	if (onoff)
17 		pmh7_register_set_bit(0x50, 5);
18 	else
19 		pmh7_register_clear_bit(0x50, 5);
20 }
21 
pmh7_dock_event_enable(int onoff)22 void pmh7_dock_event_enable(int onoff)
23 {
24 	if (onoff)
25 		pmh7_register_set_bit(0x60, 3);
26 	else
27 		pmh7_register_clear_bit(0x60, 3);
28 }
29 
pmh7_touchpad_enable(int onoff)30 void pmh7_touchpad_enable(int onoff)
31 {
32 	if (onoff)
33 		pmh7_register_clear_bit(0x51, 2);
34 	else
35 		pmh7_register_set_bit(0x51, 2);
36 }
37 
pmh7_trackpoint_enable(int onoff)38 void pmh7_trackpoint_enable(int onoff)
39 {
40 	if (onoff)
41 		pmh7_register_clear_bit(0x51, 0);
42 	else
43 		pmh7_register_set_bit(0x51, 0);
44 }
45 
pmh7_ultrabay_power_enable(int onoff)46 void pmh7_ultrabay_power_enable(int onoff)
47 {
48 	if (onoff)
49 		pmh7_register_clear_bit(0x62, 0);
50 	else
51 		pmh7_register_set_bit(0x62, 0);
52 }
53 
pmh7_dgpu_power_enable(int onoff)54 void pmh7_dgpu_power_enable(int onoff)
55 {
56 	if (onoff) {
57 		pmh7_register_clear_bit(0x50, 7); // DGPU_RST
58 		pmh7_register_set_bit(0x50, 3); // DGPU_PWR
59 		mdelay(10);
60 		pmh7_register_set_bit(0x50, 7); // DGPU_RST
61 		mdelay(50);
62 	} else {
63 		pmh7_register_clear_bit(0x50, 7); // DGPU_RST
64 		udelay(100);
65 		pmh7_register_clear_bit(0x50, 3); // DGPU_PWR
66 	}
67 }
68 
pmh7_dgpu_power_state(void)69 bool pmh7_dgpu_power_state(void)
70 {
71 	return (pmh7_register_read(0x50) & 0x08) == 8;
72 }
73 
pmh7_register_set_bit(int reg,int bit)74 void pmh7_register_set_bit(int reg, int bit)
75 {
76 	char val;
77 
78 	val = pmh7_register_read(reg);
79 	pmh7_register_write(reg, val | (1 << bit));
80 }
81 
pmh7_register_clear_bit(int reg,int bit)82 void pmh7_register_clear_bit(int reg, int bit)
83 {
84 	char val;
85 
86 	val = pmh7_register_read(reg);
87 	pmh7_register_write(reg, val & ~(1 << bit));
88 }
89 
pmh7_register_read(int reg)90 char pmh7_register_read(int reg)
91 {
92 	outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L);
93 	outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H);
94 	return inb(EC_LENOVO_PMH7_DATA);
95 }
96 
pmh7_register_write(int reg,int val)97 void pmh7_register_write(int reg, int val)
98 {
99 	outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L);
100 	outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H);
101 	outb(val, EC_LENOVO_PMH7_DATA);
102 }
103 
enable_dev(struct device * dev)104 static void enable_dev(struct device *dev)
105 {
106 	const struct ec_lenovo_pmh7_config *conf = dev->chip_info;
107 	struct resource *resource;
108 
109 	resource = new_resource(dev, EC_LENOVO_PMH7_INDEX);
110 	resource->base = EC_LENOVO_PMH7_BASE;
111 	resource->size = 16;
112 	resource->align = 5;
113 	resource->gran = 5;
114 	resource->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_ASSIGNED;
115 
116 	pmh7_backlight_enable(conf->backlight_enable);
117 	pmh7_dock_event_enable(conf->dock_event_enable);
118 
119 	pmh7_touchpad_enable(get_uint_option("touchpad", 1));
120 
121 	pmh7_trackpoint_enable(get_uint_option("trackpoint", 1));
122 
123 	printk(BIOS_INFO, "PMH7: ID %02x Revision %02x\n",
124 	       pmh7_register_read(EC_LENOVO_PMH7_REG_ID),
125 	       pmh7_register_read(EC_LENOVO_PMH7_REG_REV));
126 }
127 
128 struct chip_operations ec_lenovo_pmh7_ops = {
129 	.name = "Lenovo Power Management Hardware Hub 7",
130 	.enable_dev = enable_dev,
131 };
132