Commit | Line | Data |
---|---|---|
1b93b3c3 WZ |
1 | /* |
2 | * 16550 compatible uart based serial debug support for zboot | |
3 | */ | |
4 | ||
5 | #include <linux/types.h> | |
6 | #include <linux/serial_reg.h> | |
1b93b3c3 WZ |
7 | |
8 | #include <asm/addrspace.h> | |
9 | ||
30ad29bb | 10 | #if defined(CONFIG_MACH_LOONGSON64) || defined(CONFIG_MIPS_MALTA) |
1b93b3c3 WZ |
11 | #define UART_BASE 0x1fd003f8 |
12 | #define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset)) | |
13 | #endif | |
14 | ||
15 | #ifdef CONFIG_AR7 | |
16 | #include <ar7.h> | |
17 | #define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset)) | |
18 | #endif | |
19 | ||
ba9e72c2 | 20 | #if defined(CONFIG_MACH_JZ4740) || defined(CONFIG_MACH_JZ4780) |
59197e44 AP |
21 | #include <asm/mach-jz4740/base.h> |
22 | #define PORT(offset) (CKSEG1ADDR(JZ4740_UART0_BASE_ADDR) + (4 * offset)) | |
f9c9affc LBR |
23 | #endif |
24 | ||
8f0b0430 J |
25 | #ifdef CONFIG_CPU_XLR |
26 | #define UART0_BASE 0x1EF14000 | |
27 | #define PORT(offset) (CKSEG1ADDR(UART0_BASE) + (4 * offset)) | |
28 | #define IOTYPE unsigned int | |
29 | #endif | |
30 | ||
31 | #ifdef CONFIG_CPU_XLP | |
32 | #define UART0_BASE 0x18030100 | |
33 | #define PORT(offset) (CKSEG1ADDR(UART0_BASE) + (4 * offset)) | |
34 | #define IOTYPE unsigned int | |
35 | #endif | |
36 | ||
d6a50784 J |
37 | #ifndef IOTYPE |
38 | #define IOTYPE char | |
39 | #endif | |
40 | ||
1b93b3c3 WZ |
41 | #ifndef PORT |
42 | #error please define the serial port address for your own machine | |
43 | #endif | |
44 | ||
45 | static inline unsigned int serial_in(int offset) | |
46 | { | |
d6a50784 | 47 | return *((volatile IOTYPE *)PORT(offset)) & 0xFF; |
1b93b3c3 WZ |
48 | } |
49 | ||
50 | static inline void serial_out(int offset, int value) | |
51 | { | |
d6a50784 | 52 | *((volatile IOTYPE *)PORT(offset)) = value & 0xFF; |
1b93b3c3 WZ |
53 | } |
54 | ||
55 | void putc(char c) | |
56 | { | |
d6a50784 | 57 | int timeout = 1000000; |
1b93b3c3 WZ |
58 | |
59 | while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0)) | |
60 | ; | |
61 | ||
62 | serial_out(UART_TX, c); | |
63 | } |