1 /*
2 * Copyright (c) 2006-2021, RT-Thread Development Team
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Change Logs:
7 * Date Author Notes
8 * 2013-7-14 Peng Fan sep6200 implementation
9 */
10
11 /**
12 * @addtogroup sep6200
13 */
14
15 /*@{*/
16 #include <rthw.h>
17 #include <rtthread.h>
18
19 #include <drivers/dev_serial.h>
20
21 #include <sep6200.h>
22
23 void rt_hw_serial_putc(const char c);
24
25 #define UART0 ((struct uartport *)SEP6200_UART0_BASE)
26
27 struct rt_device uart0_device;
28 struct serial_int_rx uart0_int_rx;
29 struct serial_device uart0 =
30 {
31 UART0,
32 &uart0_int_rx,
33 RT_NULL
34 };
35
36 /*
37 * This function will handle rtos timer
38 */
rt_timer_handler(int vector,void * param)39 void rt_timer_handler(int vector, void *param)
40 {
41 rt_uint32_t clear_int;
42
43 /* clear timer interrupt */
44 if (read_reg(SEP6200_TIMER_T2IMSR) & 0x1)
45 clear_int = read_reg(SEP6200_TIMER_T2ISCR);
46
47 rt_tick_increase();
48 }
49
50 /*
51 * This function will handle serial interrupt
52 */
rt_serial_handler(int vector,void * param)53 void rt_serial_handler(int vector, void *param)
54 {
55 rt_uint32_t num;
56 switch (vector) {
57 case INTSRC_UART0:
58
59 /*No interrupt*/
60 if ((*(RP)SEP6200_UART0_IIR & 0x1))
61 return;
62
63 /*Get the serial interrupt num*/
64 num = (*(RP)SEP6200_UART0_IIR >> 1) & 0x7;
65
66 /*Receive or timeout*/
67 if ((num == 6) || (num == 2))
68 rt_hw_serial_isr(&uart0_device);
69 break;
70 /*1,2,3 not implemented now, do in future*/
71 case INTSRC_UART1:
72 break;
73 case INTSRC_UART2:
74 break;
75 case INTSRC_UART3:
76 break;
77 }
78 }
79
80 /*
81 * This function will init timer2 for system ticks
82 */
83 #define BUS4_FREQ 320000000UL
84 #define TIMER_CLK BUS4_FREQ
85 #define HZ 100
rt_hw_timer_init(void)86 void rt_hw_timer_init(void)
87 {
88 *(RP)SEP6200_TIMER_T2LCR = (TIMER_CLK + HZ / 2) / HZ;
89 *(RP)SEP6200_TIMER_T2CR = 0x6;
90
91 rt_hw_interrupt_install(INTSRC_TIMER1, rt_timer_handler, RT_NULL, "timer");
92 rt_hw_interrupt_umask(INTSRC_TIMER1);
93
94 /* start the timer */
95 *(RP)SEP6200_TIMER_T2CR |= 0x1;
96 }
97
98 /*
99 * This function will init uart
100 */
101 #define UART_CLK 60000000UL
rt_hw_uart_init(void)102 void rt_hw_uart_init(void)
103 {
104 const rt_uint32_t uartclk = UART_CLK;
105
106 *(RP)(SEP6200_UART0_LCR) = 0x83;
107 *(RP)(SEP6200_UART0_DLBH) = (uartclk/16/115200) >> 8;
108 *(RP)(SEP6200_UART0_DLBL) = (uartclk/16/115200) & 0xff;
109 *(RP)(SEP6200_UART0_LCR) = 0x83 & (~(0x1 << 7));
110
111 *(RP)(SEP6200_UART0_FCR) = 0x0;
112 *(RP)(SEP6200_UART0_MCR) = 0x0;
113
114 *(RP)(SEP6200_UART0_IER) = 0x0;
115 /* Enable rx interrupt*/
116 *(RP)(SEP6200_UART0_IER) |= 0x1;
117 /* Disable tx interrupt*/
118 *(RP)(SEP6200_UART0_IER) &= ~(0x1 << 1);
119
120 rt_hw_interrupt_install(INTSRC_UART0, rt_serial_handler, RT_NULL, "uart0");
121 rt_hw_interrupt_umask(INTSRC_UART0);
122
123 rt_hw_serial_register(&uart0_device, "uart0",
124 RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_STREAM,
125 &uart0);
126 }
127
rt_hw_board_init(void)128 void rt_hw_board_init(void)
129 {
130 int i = 0;
131 rt_hw_uart_init();
132 rt_hw_timer_init();
133 }
134
135 /*
136 * Write one char to serial, must not trigger interrupt
137 */
rt_hw_serial_putc(const char c)138 void rt_hw_serial_putc(const char c)
139 {
140 if (c == '\n')
141 rt_hw_serial_putc('\r');
142
143 while (!((*(RP)SEP6200_UART0_LSR) & 0x40));
144
145 *(RP)(SEP6200_UART0_TXFIFO) = c;
146 }
147
148 /**
149 * This function is used by rt_kprintf to display a string on console.
150 *
151 * @param str the displayed string^M
152 */
rt_hw_console_output(const char * str)153 void rt_hw_console_output(const char *str)
154 {
155 while (*str) {
156 rt_hw_serial_putc(*str++);
157 }
158 }
159
160 /*@}*/
161