1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2016, Bin Meng <bmeng.cn@gmail.com>
4 */
5
6 #include <common.h>
7 #include <asm/io.h>
8 #include <errno.h>
9 #include <smsc_sio1007.h>
10
sio1007_read(int port,int reg)11 static inline u8 sio1007_read(int port, int reg)
12 {
13 outb(reg, port);
14
15 return inb(port + 1);
16 }
17
sio1007_write(int port,int reg,int val)18 static inline void sio1007_write(int port, int reg, int val)
19 {
20 outb(reg, port);
21 outb(val, port + 1);
22 }
23
sio1007_clrsetbits(int port,int reg,u8 clr,u8 set)24 static inline void sio1007_clrsetbits(int port, int reg, u8 clr, u8 set)
25 {
26 sio1007_write(port, reg, (sio1007_read(port, reg) & ~clr) | set);
27 }
28
sio1007_enable_serial(int port,int num,int iobase,int irq)29 void sio1007_enable_serial(int port, int num, int iobase, int irq)
30 {
31 if (num < 0 || num > SIO1007_UART_NUM)
32 return;
33
34 /* enter configuration state */
35 outb(0x55, port);
36
37 /* power on serial port and set up its i/o base & irq */
38 if (!num) {
39 sio1007_clrsetbits(port, DEV_POWER_CTRL, 0, UART1_POWER_ON);
40 sio1007_clrsetbits(port, UART1_IOBASE, 0xfe, iobase >> 2);
41 sio1007_clrsetbits(port, UART_IRQ, 0xf0, irq << 4);
42 } else {
43 sio1007_clrsetbits(port, DEV_POWER_CTRL, 0, UART2_POWER_ON);
44 sio1007_clrsetbits(port, UART2_IOBASE, 0xfe, iobase >> 2);
45 sio1007_clrsetbits(port, UART_IRQ, 0x0f, irq);
46 }
47
48 /* exit configuration state */
49 outb(0xaa, port);
50 }
51
sio1007_enable_runtime(int port,int iobase)52 void sio1007_enable_runtime(int port, int iobase)
53 {
54 /* enter configuration state */
55 outb(0x55, port);
56
57 /* set i/o base for the runtime register block */
58 sio1007_clrsetbits(port, RTR_IOBASE_LOW, 0, iobase >> 4);
59 sio1007_clrsetbits(port, RTR_IOBASE_HIGH, 0, iobase >> 12);
60 /* turn on address decoding for this block */
61 sio1007_clrsetbits(port, DEV_ACTIVATE, 0, RTR_EN);
62
63 /* exit configuration state */
64 outb(0xaa, port);
65 }
66
sio1007_gpio_config(int port,int gpio,int dir,int pol,int type)67 void sio1007_gpio_config(int port, int gpio, int dir, int pol, int type)
68 {
69 int reg = GPIO0_DIR;
70
71 if (gpio < 0 || gpio > SIO1007_GPIO_NUM)
72 return;
73 if (gpio >= GPIO_NUM_PER_GROUP) {
74 reg = GPIO1_DIR;
75 gpio -= GPIO_NUM_PER_GROUP;
76 }
77
78 /* enter configuration state */
79 outb(0x55, port);
80
81 /* set gpio pin direction, polority and type */
82 sio1007_clrsetbits(port, reg, 1 << gpio, dir << gpio);
83 sio1007_clrsetbits(port, reg + 1, 1 << gpio, pol << gpio);
84 sio1007_clrsetbits(port, reg + 2, 1 << gpio, type << gpio);
85
86 /* exit configuration state */
87 outb(0xaa, port);
88 }
89
sio1007_gpio_get_value(int port,int gpio)90 int sio1007_gpio_get_value(int port, int gpio)
91 {
92 int reg = GPIO0_DATA;
93 int val;
94
95 if (gpio < 0 || gpio > SIO1007_GPIO_NUM)
96 return -EINVAL;
97 if (gpio >= GPIO_NUM_PER_GROUP) {
98 reg = GPIO1_DATA;
99 gpio -= GPIO_NUM_PER_GROUP;
100 }
101
102 val = inb(port + reg);
103 if (val & (1 << gpio))
104 return 1;
105 else
106 return 0;
107 }
108
sio1007_gpio_set_value(int port,int gpio,int val)109 void sio1007_gpio_set_value(int port, int gpio, int val)
110 {
111 int reg = GPIO0_DATA;
112 u8 data;
113
114 if (gpio < 0 || gpio > SIO1007_GPIO_NUM)
115 return;
116 if (gpio >= GPIO_NUM_PER_GROUP) {
117 reg = GPIO1_DATA;
118 gpio -= GPIO_NUM_PER_GROUP;
119 }
120
121 data = inb(port + reg);
122 data &= ~(1 << gpio);
123 data |= (val << gpio);
124 outb(data, port + reg);
125 }
126