Merge branch 'for-3.5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
[firefly-linux-kernel-4.4.55.git] / arch / arm / mach-davinci / include / mach / debug-macro.S
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
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
21 #include <mach/serial.h>
22
23 #define UART_SHIFT      2
24
25 #if defined(CONFIG_DEBUG_DAVINCI_DMx_UART0)
26 #define UART_BASE       DAVINCI_UART0_BASE
27 #elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART0)
28 #define UART_BASE       DA8XX_UART0_BASE
29 #elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART1)
30 #define UART_BASE       DA8XX_UART1_BASE
31 #elif defined(CONFIG_DEBUG_DAVINCI_DA8XX_UART2)
32 #define UART_BASE       DA8XX_UART2_BASE
33 #elif defined(CONFIG_DEBUG_DAVINCI_TNETV107X_UART1)
34 #define UART_BASE       TNETV107X_UART2_BASE
35 #define UART_VIRTBASE   TNETV107X_UART2_VIRT
36 #else
37 #error "Select a specifc port for DEBUG_LL"
38 #endif
39
40 #ifndef UART_VIRTBASE
41 #define UART_VIRTBASE   IO_ADDRESS(UART_BASE)
42 #endif
43
44                 .macro addruart, rp, rv, tmp
45                 ldr     \rp, =UART_BASE
46                 ldr     \rv, =UART_VIRTBASE
47                 .endm
48
49                 .macro  senduart,rd,rx
50                 str     \rd, [\rx, #UART_TX << UART_SHIFT]
51                 .endm
52
53                 .macro  busyuart,rd,rx
54 1002:           ldr     \rd, [\rx, #UART_LSR << UART_SHIFT]
55                 and     \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE
56                 teq     \rd, #UART_LSR_TEMT | UART_LSR_THRE
57                 bne     1002b
58                 .endm
59
60                 .macro  waituart,rd,rx
61 #ifdef FLOW_CONTROL
62 1001:           ldr     \rd, [\rx, #UART_MSR << UART_SHIFT]
63                 tst     \rd, #UART_MSR_CTS
64                 beq     1001b
65 #endif
66                 .endm
67