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7c6337e2 KH |
1 | /* |
2 | * Debugging macro for DaVinci | |
3 | * | |
4 | * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com> | |
5 | * | |
6 | * 2007 (c) MontaVista Software, Inc. This file is licensed under | |
7 | * the terms of the GNU General Public License version 2. This program | |
8 | * is licensed "as is" without any warranty of any kind, whether express | |
9 | * or implied. | |
10 | */ | |
11 | ||
17eb1570 C |
12 | /* Modifications |
13 | * Jan 2009 Chaithrika U S Added senduart, busyuart, waituart | |
14 | * macros, based on debug-8250.S file | |
15 | * but using 32-bit accesses required for | |
16 | * some davinci devices. | |
17 | */ | |
18 | ||
19 | #include <linux/serial_reg.h> | |
20 | #define UART_SHIFT 2 | |
21 | ||
4e6d488a | 22 | .macro addruart, rx, tmp |
7c6337e2 KH |
23 | mrc p15, 0, \rx, c1, c0 |
24 | tst \rx, #1 @ MMU enabled? | |
25 | moveq \rx, #0x01000000 @ physical base address | |
26 | movne \rx, #0xfe000000 @ virtual base | |
8593790d MG |
27 | #if defined(CONFIG_ARCH_DAVINCI_DA8XX) && defined(CONFIG_ARCH_DAVINCI_DMx) |
28 | #error Cannot enable DaVinci and DA8XX platforms concurrently | |
0fbc5592 SR |
29 | #elif defined(CONFIG_MACH_DAVINCI_DA830_EVM) || \ |
30 | defined(CONFIG_MACH_DAVINCI_DA850_EVM) | |
8593790d MG |
31 | orr \rx, \rx, #0x00d00000 @ physical base address |
32 | orr \rx, \rx, #0x0000d000 @ of UART 2 | |
33 | #else | |
7c6337e2 | 34 | orr \rx, \rx, #0x00c20000 @ UART 0 |
8593790d | 35 | #endif |
7c6337e2 KH |
36 | .endm |
37 | ||
17eb1570 C |
38 | .macro senduart,rd,rx |
39 | str \rd, [\rx, #UART_TX << UART_SHIFT] | |
40 | .endm | |
41 | ||
42 | .macro busyuart,rd,rx | |
43 | 1002: ldr \rd, [\rx, #UART_LSR << UART_SHIFT] | |
44 | and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE | |
45 | teq \rd, #UART_LSR_TEMT | UART_LSR_THRE | |
46 | bne 1002b | |
47 | .endm | |
48 | ||
49 | .macro waituart,rd,rx | |
50 | #ifdef FLOW_CONTROL | |
51 | 1001: ldr \rd, [\rx, #UART_MSR << UART_SHIFT] | |
52 | tst \rd, #UART_MSR_CTS | |
53 | beq 1001b | |
54 | #endif | |
55 | .endm | |
56 |