leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Blackfin arch: fix bug - Error if one serial has hardware flow control and the other doesn't

Browse Source 
I have a system where UART0 is configured with hardware flow control, but UART1
doesn't have it enabled. Attempting to access UART1 in this configuration
results in the following error in dmesg:

<3>bfin-gpio: GPIO 0 is already reserved as Peripheral by bfin-uart !
<5>Stack from 0082bc7c:
<5>        0082bc88 00404dd6 00000003 00000000 0054051e 004079da 0082bcb4
00000000
<5>        00000003 00000000 0052686c 0113f2a0 005fa3f0 00000032 20515249
00003035
<5>        00427228 00526e50 0113f2e0 005fa3f0 00000032 0113f2e0 0054b748
0000ffff
<5>        22222222 22222222 004e1628 00427304 00000000 00000032 00000023
0054b748
<5>        00487a94 0054b7e8 0054b748 0000000b 00487fb8 0054b748 0054b748
00000001
<5>        0000000a 005fa3f0 009d4fe8 0101e3c0 0054b748 005fa3f0 0050b134
0054b748
<5>
<5>Call Trace:
<4>[<00485c16>] _uart_startup+0x56/0x178
<4>[<004865c8>] _uart_open+0x40/0x3e0
<4>[<0048661c>] _uart_open+0x94/0x3e0
<4>[<0047f1ce>] _init_dev+0x1fa/0x450
<4>[<004e1628>] ___mutex_unlock_slowpath+0x30/0xe8
<4>[<004815da>] _tty_open+0xf6/0x21c
<4>[<0043dab0>] ___path_lookup_intent_open+0x34/0x7c
<4>[<004375e4>] _chrdev_open+0x7c/0x134
<4>[<0043dc2c>] _open_namei+0x60/0x568
<4>[<00433fa2>] ___dentry_open+0x9e/0x188
<4>[<00437568>] _chrdev_open+0x0/0x134
<4>[<0043410c>] _nameidata_to_filp+0x30/0x3c
<4>[<00434152>] _do_filp_open+0x3a/0x44
<4>[<00408826>] _task_running_tick+0x102/0x278
<4>[<0043418e>] _do_sys_open+0x32/0xac
<4>[<0043ede4>] _sys_ioctl+0x28/0x50
<4>[<0043edbc>] _sys_ioctl+0x0/0x50
<4>[<00434224>] _sys_open+0x18/0x20
<4>[<0043420c>] _sys_open+0x0/0x20
<4>[<00418174>] _sys_setuid+0x0/0xc8

This is because the #ifdef's in bfin_serial_5xx.h are messed up. More
specifically, they add/remove the uart_{rts,cts}_pin fields in
bfin_serial_resources based on whether the particular port has rts/cts enabled,
as opposed to when either port has it enabled.

This patch fixed this.

Signed-off-by: Tom Parker <blackfin@tevp.net>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Tom Parker 2009-03-03 17:59:39 +08:00 committed by Bryan Wu
parent ee554be9dd
commit 97d4b35fb4
7 changed files with 25 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/blackfin/mach-bf518/include/mach/bfin_serial_5xx.h
View File

@ -144,7 +144,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART0_TX,
CH_UART0_RX,
#endif
#ifdef CONFIG_BFIN_UART0_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART0_CTS_PIN,
CONFIG_UART0_RTS_PIN,
#endif
@ -158,7 +158,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART1_TX,
CH_UART1_RX,
#endif
#ifdef CONFIG_BFIN_UART1_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART1_CTS_PIN,
CONFIG_UART1_RTS_PIN,
#endif

4
arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h
View File

@ -144,7 +144,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART0_TX,
CH_UART0_RX,
#endif
#ifdef CONFIG_BFIN_UART0_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART0_CTS_PIN,
CONFIG_UART0_RTS_PIN,
#endif
@ -158,7 +158,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART1_TX,
CH_UART1_RX,
#endif
#ifdef CONFIG_BFIN_UART1_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART1_CTS_PIN,
CONFIG_UART1_RTS_PIN,
#endif

2
arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h
View File

@ -134,7 +134,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART_TX,
CH_UART_RX,
#endif
#ifdef CONFIG_BFIN_UART0_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART0_CTS_PIN,
CONFIG_UART0_RTS_PIN,
#endif

4
arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h
View File

@ -144,7 +144,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART0_TX,
CH_UART0_RX,
#endif
#ifdef CONFIG_BFIN_UART0_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART0_CTS_PIN,
CONFIG_UART0_RTS_PIN,
#endif
@ -158,7 +158,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART1_TX,
CH_UART1_RX,
#endif
#ifdef CONFIG_BFIN_UART1_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART1_CTS_PIN,
CONFIG_UART1_RTS_PIN,
#endif

4
arch/blackfin/mach-bf538/include/mach/bfin_serial_5xx.h
View File

@ -144,7 +144,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART0_TX,
CH_UART0_RX,
#endif
#ifdef CONFIG_BFIN_UART0_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART0_CTS_PIN,
CONFIG_UART0_RTS_PIN,
#endif
@ -158,7 +158,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART1_TX,
CH_UART1_RX,
#endif
#ifdef CONFIG_BFIN_UART1_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART1_CTS_PIN,
CONFIG_UART1_RTS_PIN,
#endif

22
arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h
View File

@ -63,7 +63,7 @@
#define UART_ENABLE_INTS(x, v) UART_SET_IER(x, v)
#define UART_DISABLE_INTS(x) UART_CLEAR_IER(x, 0xF)
#if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_CTSRTS)
#if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART2_CTSRTS)
# define CONFIG_SERIAL_BFIN_CTSRTS
# ifndef CONFIG_UART0_CTS_PIN
@ -74,12 +74,12 @@
# define CONFIG_UART0_RTS_PIN -1
# endif
# ifndef CONFIG_UART1_CTS_PIN
# define CONFIG_UART1_CTS_PIN -1
# ifndef CONFIG_UART2_CTS_PIN
# define CONFIG_UART2_CTS_PIN -1
# endif
# ifndef CONFIG_UART1_RTS_PIN
# define CONFIG_UART1_RTS_PIN -1
# ifndef CONFIG_UART2_RTS_PIN
# define CONFIG_UART2_RTS_PIN -1
# endif
#endif
@ -130,7 +130,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART0_TX,
CH_UART0_RX,
#endif
#ifdef CONFIG_BFIN_UART0_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART0_CTS_PIN,
CONFIG_UART0_RTS_PIN,
#endif
@ -143,6 +143,10 @@ struct bfin_serial_res bfin_serial_resource[] = {
#ifdef CONFIG_SERIAL_BFIN_DMA
CH_UART1_TX,
CH_UART1_RX,
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
0,
0,
#endif
},
#endif
@ -154,7 +158,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART2_TX,
CH_UART2_RX,
#endif
#ifdef CONFIG_BFIN_UART2_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART2_CTS_PIN,
CONFIG_UART2_RTS_PIN,
#endif
@ -167,6 +171,10 @@ struct bfin_serial_res bfin_serial_resource[] = {
#ifdef CONFIG_SERIAL_BFIN_DMA
CH_UART3_TX,
CH_UART3_RX,
#endif
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
0,
0,
#endif
},
#endif

2
arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h
View File

@ -134,7 +134,7 @@ struct bfin_serial_res bfin_serial_resource[] = {
CH_UART_TX,
CH_UART_RX,
#endif
#ifdef CONFIG_BFIN_UART0_CTSRTS
#ifdef CONFIG_SERIAL_BFIN_CTSRTS
CONFIG_UART0_CTS_PIN,
CONFIG_UART0_RTS_PIN,
#endif