David Turner , thank for your reply.
And now my /dev/ttyVSP0 can't be opened in android, if it is
opened ,then kernel panic. It' s big problem.
By the way, if /dev/ttyVSP0(a char device map to uart 0) driver works
well, i just need to implement reference-ril.c, such as(1) change the
Open() device,(2)modify AT command for my GSM module. Like this ,
radio will work.
If i need to modify other files under ril directory?
On 2月20日, 上午6时18分, David Turner <di...@android.com> wrote:
> the value of errno should give you more information about the error. I
> suspect a permission problem, but I don't know how these are setup in the
> system for device files.
>
> On Thu, Feb 19, 2009 at 11:04 AM, dephon...@gmail.com
> <dephon...@gmail.com>wrote:
>
>
>
>
>
> > Hi, all:
>
> > I am porting Android GSM CALL function to my EVB. I have a /dev/
> > ttyVSP0 device which used to send AT command.
>
> > But fd = open ("/dev/ttyVSP0", O_RDWR); always returen -1 in mainLoop
> > () (locate in reference-ril.c).
>
> > My code looks like this:
>
> > static void * mainLoop(void *param) //reference-ril.c
>
> > {.....
>
> > while (fd < 0) {
>
> > if (s_port > 0) {
>
> > fd = socket_loopback_client(s_port, SOCK_STREAM);
>
> > LOGI("mainLoop 111\n");
>
> > } else if (s_device_socket) {
>
> > fd = socket_local_client( s_device_path,
>
> > ANDROID_SOCKET_NAMESPACE_FILESYSTEM,
>
> > SOCK_STREAM );
>
> > LOGI("mainLoop 222\n");
>
> > } else if (s_device_path != NULL) {
>
> > LOGI("mainLoop 333\n");
>
> > fd = open (s_device_path, O_RDWR);
>
> > LOGI("mainLoop open return %d.\n", fd);
>
> > if ( fd >= 0 && !memcmp( s_device_path, "/dev/
> > ttyVSP0", 12 ) ) {
>
> > /* disable echo on serial ports */
>
> > struct termios ios;
>
> > tcgetattr( fd, &ios );
>
> > ios.c_lflag = 0; /* disable ECHO, ICANON, etc...
> > */
>
> > tcsetattr( fd, TCSANOW, &ios );
>
> > LOGI("mainLoop 444\n");
>
> > }
>
> > }
>
> > if (fd < 0) {
>
> > perror ("opening AT interface. retrying...");
>
> > LOGI("mainLoop 555\n");
>
> > sleep(10);
>
> > /* never returns */
>
> > }
>
> > else
>
> > {
>
> > LOGI("mainLoop exit while\n");
>
> > }
>
> > ......
> > }
>
> > My debug info is (Just get by: logcat -b radio)
>
> > # logcat -b radio
>
> > I/RIL ( 408): Opening tty device /dev/ttyVSP0
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RILJ ( 455): Connected to 'rild' socket
>
> > I/RILC ( 408): libril: new connection
>
> > I/RILC ( 408): RIL Daemon version: zmzmzm reference-ril 1.0
>
> > D/RILJ ( 455): [UNSL]< UNSOL_RESPONSE_RADIO_STATE_CHANGED
> > RADIO_UNAVAILABLE
>
> > W/GSM ( 455): Can't open /system/etc/voicemail-conf.xml
>
> > D/RILJ ( 455): [0000]> GET_CURRENT_CALLS
>
> > D/GSM ( 455): Poll ServiceState done: oldSS=[1 home null null
> > null ] newSS=[1 home null null null ] oldGprs=1 newGprs=1
> > oldType=unknown newType=unknown
>
> > D/RIL ( 408): onRequest: GET_CURRENT_CALLS
>
> > D/RILJ ( 455): [0000]< GET_CURRENT_CALLS error:
> > com.android.internal.telephony.gsm.CommandException:
> > RADIO_NOT_AVAILABLE
>
> > D/GSM ( 455): [DataConnectionTracker] Radio is off and clean up
> > all connection
>
> > D/GSM ( 455): [DataConnectionTracker] Clean up connection due to
> > radioTurnedOff
>
> > D/GSM ( 455): [DataConnection] Stop poll NetStat
>
> > D/GSM ( 455): [DataConnectionTracker] setState: IDLE
>
> > D/GSM ( 455): [DataConnection] Stop poll NetStat
>
> > D/GSM ( 455): [DataConnectionTracker] ***trySetupData due to
> > roamingOff
>
> > D/GSM ( 455): [DataConnectionTracker] trySetupData: Not ready for
> > data: dataState=IDLE gprsState=1 sim=false UMTS=false phoneState=IDLE
> > dataEnabled=true roaming=false dataOnRoamingEnable=false
>
> > D/GSM ( 455): [GsmSimCard] Broadcasting intent
> > SIM_STATE_CHANGED_ACTION NOT_READY reason null
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > D/STK ( 455): StkAppService$ServiceHandler: OP_BOOT_COMPLETED
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > I/RIL ( 408): mainLoop 333
>
> > I/RIL ( 408): mainLoop open return -1.
>
> > I/RIL ( 408): mainLoop 555
>
> > [ 121.580000] android_power: sleep (0->2) at 121572574640 (1970-01-01
> > 00:02:01.572582011 UTC)
>
> > My /dev info:
>
> > # ls -l /dev/ttyVSP0
>
> > crw------- root root 250, 0 1970-01-01 00:00 ttyVSP0
>
> > # ls -l /system/lib/libreference-ril.so
>
> > -rw-r--r-- system system 21896 2009-02-02 03:41 libreference-
> > ril.so
>
> > # ls -l /system/lib/libril.so
>
> > -rw-r--r-- system system 27112 2009-02-02 03:27 libril.so
>
> > £š2£(c)If i chang /dev/ttyVSP0£¬Open("/dev/ttyVSP0") successful, bu
> > kernel panic. if i chmod 772, Open() OK£¬ otherwise (such as 644, 774,
> > 744) permission defiend:
>
> > # /system/bin/rild -l /system/lib/libreference-ril.so -- -d /dev/
> > ttyVSP0
>
> > opening AT interface. retrying...: Permission denied
>
> > # chmod 644 /dev/ttyVSP0
>
> > # /system/bin/rild -l /system/lib/libreference-ril.so -- -d /dev/
> > ttyVSP0
>
> > opening AT interface. retrying...: Permission denied
>
> > # chmod 744 /dev/ttyVSP0
>
> > # /system/bin/rild -l /system/lib/libreference-ril.so -- -d /dev/
> > ttyVSP0
>
> > opening AT interface. retrying...: Permission denied
>
> > # chmod 772 /dev/ttyVSP0
>
> > #/system/bin/rild -l /system/lib/libreference-ril.so -- -d /dev/
> > ttyVSP0
>
> > [ 140.940000]
>
> > [ 140.940000] MUTEX_LOCK = 0
>
> > [ 140.950000]
>
> > [ 140.950000] MUTEX_LOCK = 0
>
> > [ 140.950000]
>
> > [ 140.950000] MUTEX_LOCK = 0
>
> > [ 140.960000]
>
> > [ 140.960000] MUTEX_LOCK = 0
>
> > [ 140.960000] vsp_tty_open: port number 0 //but mainLoop still
> > while (fd < 0)
>
> > Kernel panic info:
>
> > # chmod 777 /dev/ttyVSP0
>
> > [ 247.690000]
>
> > [ 247.690000] MUTEX_LOCK = 0
>
> > [ 247.690000]
>
> > [ 247.690000] MUTEX_LOCK = 0
>
> > [ 247.690000]
>
> > [ 247.690000] MUTEX_LOCK = 0
>
> > [ 247.700000]
>
> > [ 247.700000] MUTEX_LOCK = 0
>
> > [ 247.700000] vsp_tty_open: port number 0 //this is my debug
> > info in my VSP driver.
>
> > [ 247.920000] Unable to handle kernel NULL pointer dereference at
> > virtual address 00000000
>
> > [ 247.920000] pgd = c0004000
>
> > [ 247.920000] [00000000] *pgd=00000000
>
> > [ 247.920000] Internal error: Oops: 817 [#1] PREEMPT
>
> > [ 247.920000] Modules linked in:
>
> > [ 247.920000] CPU: 0 Not tainted (2.6.25 #31)
>
> > [ 247.920000] PC is at ghdi_gpdma_set_property+0x2cc/0x388
>
> > [ 247.920000] LR is at 0xc02dfc50
>
> > [ 247.920000] pc : [<c0196dbc>] lr : [<c02dfc50>] psr: 60000093
>
> > [ 247.920000] sp : c68b1f20 ip : 00000000 fp : c68b1f44
>
> > [ 247.920000] r10: 00000000 r9 : 00000001 r8 : ffc00000
>
> > [ 247.920000] r7 : c02df5d0 r6 : c68b1f68 r5 : 00000000 r4 :
> > 00000001
>
> > [ 247.920000] r3 : 00000000 r2 : 0000058f r1 : c68b0000 r0 :
> > 00000000
>
> > [ 247.920000] Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM
> > Segment kernel
>
> > [ 247.920000] Control: 0005317f Table: 473bc000 DAC: 00000017
>
> > [ 247.920000] Process swapper (pid: 224, stack limit = 0xc68b0268)
>
> > [ 247.920000] Stack: (0xc68b1f20 to 0xc68b2000)
>
> > [ 247.920000] 1f20: c0193b80 20000013 c68b1f44 00000000 c68b1f68
> > c882ab6c c68b1fa4 c68b1f48
>
> > [ 247.920000] 1f40: c0195aa8 c0196b00 00000000 40000013 468d3000
> > 00000000 c02df5f8 0000011a
>
> > [ 247.920000] 1f60: 468d3000 c7355400 0000058f 00000400 0000011a
> > 2002e010 c0141c40 0000011a
>
> > [ 247.920000] 1f80: 00000000 c02df5f8 00000000 00000000 00000000
> > c02df5d0 c68b1ff4 c68b1fa8
>
> > [ 247.920000] 1fa0: c01961dc c0195908 00000000 00000000 00000001
> > 00000000 c68b1fb8 c68b1fb8
>
> > [ 247.920000] 1fc0: 2002d7b0 00000010 00000000 00000000 00000000
> > 00000000 00000000 00000000
>
> > [ 247.920000] 1fe0: 00000000 00000000 00000000 c68b1ff8 c003eef0
> > c0195e50 00000000 00000000
>
> > [ 247.920000] Backtrace:
>
> > [ 247.920000] [<c0196af0>] (ghdi_gpdma_set_property+0x0/0x388) from
> > [<c0195aa8>] (vsp_read+0x1b0/0x4f8)
>
> > [ 247.920000] r6:c882ab6c r5:c68b1f68 r4:00000000
>
> > [ 247.920000] [<c01958f8>] (vsp_read+0x0/0x4f8) from [<c01961dc>]
> > (crm_manager_a9+0x39c/0x578)
>
> > [ 247.920000] [<c0195e40>] (crm_manager_a9+0x0/0x578) from
> > [<c003eef0>] (do_exit+0x0/0x68c)
>
> > [ 247.920000] Code: e023e39c e5962000 e5933050 e3a04001 (e5832000)
>
> > [ 247.930000] Kernel panic - not syncing: Fatal exception
>
> > My question is:
>
> > (1)Why i can't open("/dev/ttyVSP0") Ok£¬but Open("/dev/ttyS0") OK¡£
>
> > # ls -l /dev/ttyVSP0
>
> > crw------- root root 250, 0 1970-01-01 00:00 ttyVSP0
>
> > # ls -l /dev/ttyS0
>
> > crw------- root
>
> ...
>
> 阅读更多 »- 隐藏被引用文字 -
>
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