/* * Copyright 1997 * Digital Equipment Corporation. All rights reserved. * * This software is furnished under license and may be used and * copied only in accordance with the following terms and conditions. * Subject to these conditions, you may download, copy, install, * use, modify and distribute this software in source and/or binary * form. No title or ownership is transferred hereby. * * 1) Any source code used, modified or distributed must reproduce * and retain this copyright notice and list of conditions as * they appear in the source file. * * 2) No right is granted to use any trade name, trademark, or logo of * Digital Equipment Corporation. Neither the "Digital Equipment * Corporation" name nor any trademark or logo of Digital Equipment * Corporation may be used to endorse or promote products derived * from this software without the prior written permission of * Digital Equipment Corporation. * * 3) This software is provided "AS-IS" and any express or implied * warranties, including but not limited to, any implied warranties * of merchantability, fitness for a particular purpose, or * non-infringement are disclaimed. In no event shall DIGITAL be * liable for any damages whatsoever, and in particular, DIGITAL * shall not be liable for special, indirect, consequential, or * incidental damages or damages for lost profits, loss of * revenue or loss of use, whether such damages arise in contract, * negligence, tort, under statute, in equity, at law or otherwise, * even if advised of the possibility of such damage. */ /* **++ ** ** FACILITY: ** ** Driver for smart card ** ** ABSTRACT: ** ** The driver provides access to a Smart Card for the DNARD. ** ** There is no Smart Card silicon. Several i/o pins ** connect to the pads on the Smart Card, and the driver is ** is responsible for driving the signals in accordance with ** ISO 7816-3 (the Smart Card spec) ** ** This driver puts a high load on the system due to the need ** to interrupt at a high rate (up to 50 Khz) during bit detection. ** ** ** The driver is dived into the standard top half ioctl, and bottom ** half interupt. The interrupt is FIQ, which requires its own stack. ** disable_interrupts and restore_interrupts must be used to protect from ** a FIQ. Since splxxx functions do not use this, the bottom half cannot ** use any standard functions (ie like wakeup, timeout, etc. ** Thus the communication from the bottom half ** to the top half uses a "done" bit called masterDone. This bit ** is set by the master state machine when all bottom half work is ** complete. The top half checks/sleeps on this masterDone bit. ** ** The FIQ is driven by Timer 2 (T2)in the sequoia. All times are ** referenced to T2 counts. ** ** The bottom half is done as a several linked state machines. ** The top level machine is the maserSM (ie master State Machine). This ** machine calls mid level protocol machines, ie ATRSM (Answer To Reset ** State Machine), t0SendSM (T=0 Send State Machine), and t0RecvSM (T=0 Recv ** State Machine). These mid level protocol machines in turn call low level ** bit-bashing machines, ie coldResetSM, t0SendByteSM, T0RecvByteSM. ** ** Smart Cards are driven in a command/response mode. Ie you issue a command ** to the Smart Card and it responds. This command/response mode is reflected ** in the structure of the driver. Ie the ioctl gets a command, it ** gives it to the bottom half to execute and goes to sleep. The bottom half ** executes the command and gets the response to from the card and then ** notifies the top half that it has completed. Commands usually complete ** in under a second. ** ** ** ** AUTHORS: ** ** E. J. Grohn ** Digital Equipment Corporation. ** ** CREATION DATE: ** ** 27-July-97 ** **-- */ /* ** ** INCLUDE FILES ** */ #include #include #include /* #include */ /* #include */ #include /* #include */ #include /* #include */ /* #include */ #include /* #include */ #include #include #include #include /* SCR_DEBUG is the master switch for turning on debugging */ //#define SCR_DEBUG 1 #ifdef SCR_DEBUG #define KERNEL_DEBUG #ifdef DDB #define DEBUGGER printf("file = %s, line = %d\n",__FILE__,__LINE__);Debugger() #else #define DEBUGGER panic("file = %s, line = %d\n",__FILE__,__LINE__); #endif #else #define DEBUGGER #endif #include //#include #include #include #include #include /* ** ** MACRO DEFINITIONS ** */ #define scr_lcr scr_cfcr /* ** Macro to extract the minor device number from the device Identifier */ #define SCRUNIT(x) (minor(x)) /* ** Macros to clear/set/test bit flags. */ #define SET(t, f) (t) |= (f) #define CLR(t, f) (t) &= ~(f) #define ISSET(t, f) ((t) & (f)) #define ISCLR(t, f) ( ((t) & (f)) == 0) /* ** some macros to assist in debugging */ #ifdef SCR_DEBUG #define KERNEL_DEBUG #define ASSERT(f) do { if (!(f)) { DEBUGGER;} }while(0) #define TOGGLE_TEST_PIN() scrToggleTestPin() #define INVALID_STATE_CMD(sc,state,cmd) invalidStateCmd(sc,state,cmd,__LINE__); #else #define ASSERT(f) #define TOGGLE_TEST_PIN() //#define INVALID_STATE_CMD(sc,state,cmd) panic("scr: invalid state/cmd, sc = %X, state = %X, cmd = %X, line = %d\n",sc,state,cmd,__LINE__); #define INVALID_STATE_CMD(sc,state,cmd) sc->bigTrouble = TRUE; #endif #ifndef FALSE #define FALSE 0 #endif #ifndef TRUE #define TRUE 1 #endif /* ** The first and last bytes of the debug control variables is reserved for ** the standard KERN_DEBUG_xxx macros, so we can tailor the middle two bytes */ #define SCRPROBE_DEBUG_INFO 0x00000100 #define SCRATTACH_DEBUG_INFO 0x00000200 #define SCROPEN_DEBUG_INFO 0x00000400 #define SCRCLOSE_DEBUG_INFO 0x00000800 #define SCRREAD_DEBUG_INFO 0x00001000 #define SCRWRITE_DEBUG_INFO 0x00002000 #define SCRIOCTL_DEBUG_INFO 0x00004000 #define MASTER_SM_DEBUG_INFO 0x00008000 #define COLD_RESET_SM_DEBUG_INFO 0x00010000 #define ATR_SM_DEBUG_INFO 0x00020000 #define T0_RECV_BYTE_SM_DEBUG_INFO 0x00040000 #define T0_SEND_BYTE_SM_DEBUG_INFO 0x00080000 #define T0_RECV_SM_DEBUG_INFO 0x00100000 #define T0_SEND_SM_DEBUG_INFO 0x00200000 int scrdebug = //SCRPROBE_DEBUG_INFO | //SCRATTACH_DEBUG_INFO | //SCROPEN_DEBUG_INFO | //SCRCLOSE_DEBUG_INFO | //SCRREAD_DEBUG_INFO | //SCRWRITE_DEBUG_INFO | //SCRIOCTL_DEBUG_INFO | //MASTER_SM_DEBUG_INFO | //COLD_RESET_SM_DEBUG_INFO| //ATR_SM_DEBUG_INFO | //T0_RECV_BYTE_SM_DEBUG_INFO | //T0_SEND_BYTE_SM_DEBUG_INFO | //T0_RECV_SM_DEBUG_INFO | //T0_SEND_SM_DEBUG_INFO | 0; /* ** the bottom half of the driver is done as several linked state machines ** below are all the states of the machines, and the commands that are ** sent to each machine */ /* commands to Master State Machine from ioctl */ #define mcOn 0x0100 /* ioctl on */ #define mcT0DataSend 0x0102 /* ioctl send */ #define mcT0DataRecv 0x0103 /* ioctl recv */ /* commands to Master State Machine from lower state machines */ #define mcColdReset 0x0105 /* cold reset finished */ #define mcATR 0x0106 /* ATR has finished */ #define mcT0Send 0x0108 /* T0 send finished */ #define mcT0Recv 0x010a /* T0 recv finished */ /* states in Master state machine (ms = Master State) */ #define msIdleOff 0x0200 /* in idle state, card powered off */ #define msColdReset 0x0201 /* turning on power, clock, reset */ #define msATR 0x0202 /* getting ATR sequence from card */ #define msIdleOn 0x0203 /* idle, put card powered on */ #define msT0Send 0x0204 /* sending T0 data */ #define msT0Recv 0x0205 /* recving T0 data */ /* commands to T0 send state machine */ #define t0scStart 0x0300 /* start */ #define t0scTWorkWaiting 0x0301 /* work waiting timeout */ /* states in T0 send state machine */ #define t0ssIdle 0x0400 /* idle state */ #define t0ssSendHeader 0x0401 /* send 5 header bytes */ #define t0ssRecvProcedure 0x0402 /* wait for procedure byte */ #define t0ssSendByte 0x0403 /* send 1 byte */ #define t0ssSendData 0x0404 /* send all bytes */ #define t0ssRecvSW1 0x0405 /* wait for sw1 */ #define t0ssRecvSW2 0x0406 /* wait for sw2 */ /* commands to T0 recv state machine */ #define t0rcStart 0x0500 /* start */ #define t0rcTWorkWaiting 0x0501 /* work waiting timeout */ /* states in T0 recv state machine */ #define t0rsIdle 0x0600 /* idle state */ #define t0rsSendHeader 0x0601 /* send 5 header bytes */ #define t0rsRecvProcedure 0x0602 /* wait for procedure byte */ #define t0rsRecvByte 0x0603 /* recv 1 byte */ #define t0rsRecvData 0x0604 /* recv all bytes */ #define t0rsRecvSW1 0x0605 /* wait for sw1 */ #define t0rsRecvSW2 0x0606 /* wait for sw2 */ /* commands to Cold Reset state machine */ #define crcStart 0x0900 /* start */ #define crcT2 0x0902 /* timeout T2 ISO 7816-3, P6, Figure 2 */ /* states in cold reset state machine */ #define crsIdle 0x0a00 /* idle */ #define crsT2Wait 0x0a01 /* wait for T2 ISO 7816-3.P6. Figure 2 */ /* commands to Answer To Reset (ATR) state machine */ #define atrcStart 0x0b00 /* start */ #define atrcT3 0x0b04 /* got T3 timeout */ #define atrcTWorkWaiting 0x0b05 /* work waiting timeout */ /* states in Answer To Reset (ATR) state machine */ #define atrsIdle 0x0c00 /* idle */ #define atrsTS 0x0c01 /* looking for TS, (initial bytes) */ #define atrsT0 0x0c02 /* looking for T0, (format bytes) */ #define atrsTABCD 0x0c03 /* looking for TAx (interface bytes)*/ #define atrsTK 0x0c04 /* looking for TK (history bytes) */ #define atrsTCK 0x0c05 /* looking for TCK (check bytes */ /* commands to T0 Recv Byte state machine */ #define t0rbcStart 0x0d00 /* start */ #define t0rbcAbort 0x0d01 /* abort */ #define t0rbcTFindStartEdge 0x0d02 /* start bit edge search */ #define t0rbcTFindStartMid 0x0d03 /* start bit mid search */ #define t0rbcTClockData 0x0d04 /* data bit search */ #define t0rbcTErrorStart 0x0d05 /* start to send error */ #define t0rbcTErrorStop 0x0d06 /* stop sending error */ /* states in T0 Recv Byte state machine */ #define t0rbsIdle 0x0e00 /* idle */ #define t0rbsFindStartEdge 0x0e01 /* looking for start bit */ #define t0rbsFindStartMid 0x0e02 /* looking for start bit */ #define t0rbsClockData 0x0e03 /* looking for data bits */ #define t0rbsSendError 0x0e04 /* output error bit */ /* commands to T0 Send Byte state machine */ #define t0sbcStart 0x0f00 /* start the machine */ #define t0sbcAbort 0x0f01 /* abort the machine */ #define t0sbcTGuardTime 0x0f02 /* guard time finished */ #define t0sbcTClockData 0x0f03 /* clock time finished */ #define t0sbcTError 0x0f04 /* start to send error */ #define t0sbcTResend 0x0f05 /* if parity error, then wait unfill we can re-send */ /* states in T0 Send Byte state machine */ #define t0sbsIdle 0x1000 /* idle */ #define t0sbsWaitGuardTime 0x1001 /* wait for guard time to finish */ #define t0sbsClockData 0x1002 /* clocking out data & parity */ #define t0sbsWaitError 0x1003 /* waiting for error indicator */ #define t0sbsWaitResend 0x1004 /* waiting to start re-send if error */ /* ** generic middle level state machine commands ** sent by T0 Send Byte & T0 recv Byte to T0 Send and T0 Recv */ #define gcT0RecvByte 0x1100 /* receive finished */ #define gcT0RecvByteErr 0x1101 /* receive got error */ #define gcT0SendByte 0x1102 /* send finished */ #define gcT0SendByteErr 0x1103 /* send got error */ /* ** ** below are definitions associated with Smart Card ** */ /* ** Frequency of clock sent to card ** NCI's card is running at 1/2 freq, so in debug we can make ** use of this to toggle more debug signals and still be within ** interrupt time budget */ #ifdef SCR_DEBUG #define CARD_FREQ_DEF (3579000/2) #else #define CARD_FREQ_DEF (3579000) #endif /* byte logic level and msb/lsb coding */ #define CONVENTION_UNKOWN 0 #define CONVENTION_INVERSE 1 #define CONVENTION_DIRECT 2 #define CONVENIONT_INVERSE_ID 0x3f #define CONVENTION_DIRECT_FIX 0x3b #define CONVENTION_DIRECT_ID 0x23 /* macros that help us set the T2 count for bit bashing */ #define CLK_COUNT_START (((372 * TIMER_FREQ) / sc->cardFreq) /5) #define CLK_COUNT_DATA (((372 * TIMER_FREQ) / sc->cardFreq) ) #define START_2_DATA 5 /* default settings to use if not specified in ATR */ #define N_DEFAULT 0 /* guard time default */ #define Fi_DEFAULT 372 /* clock rate conversion default */ #define Di_DEFAULT 1 /* bit rate adjustment factor */ #define Wi_DEFAULT 10 /* waiting time */ /* table for clock rate adjustment in ATR */ int FI2Fi[16] = {372, 372, 558, 744,1116,1488,1860, 0, 0, 512, 768,1024,1536,2048, 0, 0}; /* table for bit rate adjustment in ATR*/ int DI2Di[16] = { 0, 1, 2, 4, 8, 16, 32, 0, 12, 20, 0, 0, 0, 0, 0, 0}; /* values of atrY in the ATR sequence*/ #define ATR_Y_TA 0x10 #define ATR_Y_TB 0x20 #define ATR_Y_TC 0x40 #define ATR_Y_TD 0x80 /* T0,T1,etc information in ATR sequence*/ #define PROTOCOL_T0 0x0001 /* bit 0 for T0 */ #define PROTOCOL_T1 0x0002 /* bit 1 for T1 */ #define PROTOCOL_T2 0x0004 /* bit 2 for T2*/ #define PROTOCOL_T3 0x0008 /* bit 3 for T3*/ /* etc */ /* timeouts for various places - see ISO 7816-3 */ #define T_t2 ((300 * TIMER_FREQ) / sc->cardFreq) #define T_t3 ((40000 * (TIMER_FREQ/1024)) / (sc->cardFreq/1024)) #define T_WORK_WAITING (((960 * sc->Wi * sc->Fi ) / (sc->cardFreq/1024)) * (TIMER_FREQ/1024)) #define PARITY_ERROR_MAX 3 /* maximum parity errors on 1 byte before giving up */ /* ** its possible for the HAT to wedge. If that happens, all timing is sick, so ** we use timeout below (driven of system sleeps) as a "watchdog" */ #define MAX_FIQ_TIME 5 /* maximum time we are willing to run the FIQ */ /* used to decode T0 commands */ #define CMD_BUF_INS_OFF 1 /* offset to INS in header */ #define CMD_BUF_DATA_LEN_OFF 4 /* offset to data length in header */ /* ** ** DATA STRUCTURES ** */ typedef unsigned char BYTE; /* our soft c structure */ struct scr_softc { struct device dev; int open; /* configuration information */ int status; /* status to be returned */ int cardFreq; /* freq supplied to card */ int convention; /* ie direct or inverse */ int protocolType; /* bit 0 indicates T0, bit 1 indicates T1,etc */ int N; /* guard time */ int Fi; /* clock rate */ int Di; /* bit rate adjustment */ int Wi; /* work waiting time */ int clkCountStartRecv; /* count for clock start bits on recv */ int clkCountDataRecv; /* count for clock data bits on recv*/ int clkCountDataSend; /* count for clock data bits on send */ /* state machines */ int masterS ; int t0RecvS; int t0SendS; int coldResetS; int ATRS; int t0RecvByteS; int t0SendByteS; /* extra stuff kept for t0send state machine */ int commandCount; /* number of command bytes sent */ int dataCount; /* number of data bytes send/recv */ int dataMax; /* max number of data bytes to send/recv */ /* extra stuff kept for t0RecvByteS, t0SendByteS machines */ void (*t0ByteParent) __P((struct scr_softc *,int)); /* state machine that is controlling this SM */ int shiftBits; /* number of bits shifted */ BYTE shiftByte; /* intermediate value of bit being shifted */ BYTE dataByte; /* actual value of byte */ int shiftParity; /* value of parity */ int shiftParityCount; /* number of retries due to parity error */ /* extra stuff kept for ATR machine */ int atrY; /* indicates if TA,TB,TC,TD is to follow */ int atrK; /* number of historical characters*/ int atrKCount; /* progressive could of historical characters*/ int atrTAx; /* how many TA characters we have received */ int atrTBx; /* how many TB characters we have received */ int atrTCx; /* how many TB characters we have received */ int atrTDx; /* how many TB characters we have received */ int atrFi; /* value of Fi */ int atrDi; /* value of Di */ int masterDone; /* flag used by bottom half to tell top half its done */ int bigTrouble; /* david/jim, remove this when the dust settles */ /* pointers used by ioctl */ ScrOn * pIoctlOn; /* pointer to on ioctl data */ ScrT0 * pIoctlT0; /* pointer to T0 ioctl data */ }; /* number of devices */ static int devices = 0; /* used as reference for tsleep */ static int tsleepIdent; /* ** only 1 device is using the hat at any one time ** variable below must be acquired using splhigh before using the hat */ static int hatLock = FALSE; /* ** data structures associated with our timeout queue that we run for the ** bottom half of the driver */ /* timeout callout structure */ typedef struct callout_t { struct callout_t *c_next; /* next callout in queue */ struct scr_softc *c_sc; /* soft c */ int c_arg; /* function argument */ void (*c_func) __P((struct scr_softc*,int)); /* function to call */ int c_time; /* ticks to the event */ }Callout; /* actual callout array */ #define SCR_CLK_CALLOUT_COUNT 10 static Callout scrClkCalloutArray[SCR_CLK_CALLOUT_COUNT]; /* callout lists */ static Callout *scrClkCallFree; /* free queue */ static Callout scrClkCallTodo; /* todo queue */ /* ** information kept for the clock/FIQ that drives our timeout queue */ static int scrClkEnable = 0; /* true if clock enabled */ static void myHatWedge(int nFIQs); /* callback that informs us if FIQ has wedged */ static int scrClkCount; /* number used to set t2 that drives FIQ */ #define HATSTACKSIZE 1024 /* size of stack used during a FIQ */ static unsigned char hatStack[HATSTACKSIZE]; /* actual stack used during a FIQ */ /* ** ** FUNCTIONAL PROTOTYPES ** */ /* ** ** functions in top half of driver ** */ /* configure routines */ int scrprobe __P((struct device *, void *, void *)); void scrattach __P((struct device *, struct device *, void *)); /* driver entry points routines */ int scropen __P((dev_t dev, int flag, int mode, struct proc *p)); int scrclose __P((dev_t dev, int flag, int mode, struct proc *p)); int scrread __P((dev_t dev, struct uio *uio, int flag)); int scrwrite __P((dev_t dev, struct uio *uio, int flag)); int scrioctl __P((dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p)); void scrstop __P((struct tty *tp, int flag)); static void initStates __P((struct scr_softc * sc)); /* ** ** functions in bottom half of driver ** */ /* top level state machine */ static void masterSM __P((struct scr_softc * sc,int cmd)); /* mid level state machines, ie protocols */ static void t0SendSM __P((struct scr_softc * sc,int cnd)); static void t0RecvSM __P((struct scr_softc * sc,int cnd)); static void ATRSM __P((struct scr_softc * sc,int cnd)); /* low level state machines, ie bash hardware bits */ static void coldResetSM __P((struct scr_softc * sc,int cnd)); static void t0SendByteSM __P((struct scr_softc * sc,int cnd)); static void t0RecvByteSM __P((struct scr_softc * sc,int cnd)); static void cardOff __P((struct scr_softc * sc)); /* ** functions used for our own timeout routines. ** we cannot use system ones as we are running at a spl level ** that can interrupt the system timeout routines */ static void scrClkInit __P(()); static void scrClkStart __P((struct scr_softc* sc,int countPerTick)); static void scrClkAdj __P((int count)); static void scrClkStop __P((void)); static void hatClkIrq __P((int count)); static void scrTimeout __P((void (*func)(struct scr_softc*,int), struct scr_softc*, int arg, int count)); static void scrUntimeout __P((void (*func)(struct scr_softc*,int), struct scr_softc*, int arg)); /* debug functions */ #ifdef SCR_DEBUG static void invalidStateCmd __P((struct scr_softc* sc,int state,int cmd, int line)); static char * getText __P((int x)); #endif /* Declare the cdevsw and bdevsw entrypoint routines */ cdev_decl(scr); bdev_decl(scr); struct cfattach scr_ca = { sizeof(struct scr_softc), (cfmatch_t)scrprobe, scrattach }; extern struct cfdriver scr_cd; /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrProbe ** ** This is the probe routine for the Smart Card. Because the ** Smart Card is hard wired, there is no probing to peform. The ** function ensures that a succesfull problem occurs only once. ** ** FORMAL PARAMETERS: ** ** parent - input : pointer to the parent device ** match - not used ** aux - output : pointer to an isa_attach_args structure. ** ** IMPLICIT INPUTS: ** ** none. ** ** IMPLICIT OUTPUTS: ** ** none. ** ** FUNCTION VALUE: ** ** 0 - Probe failed to find the requested device. ** 1 - Probe successfully talked to the device. ** ** SIDE EFFECTS: ** ** none. **-- */ int scrprobe(parent, match, aux) struct device *parent; void *match; void *aux; { struct isa_attach_args *ia = aux; int rv = 0; KERN_DEBUG (scrdebug, SCRPROBE_DEBUG_INFO,("scrprobe: called, name = %s\n", parent->dv_cfdata->cf_driver->cd_name)); if (strcmp(parent->dv_cfdata->cf_driver->cd_name, "ofisascr") == 0 && devices == 0) { /* set "devices" to ensure that we respond only once */ devices++; /* tell the caller that we are not using any resource */ ia->ia_iosize = -1; ia->ia_irq = -1; ia->ia_msize = 0; rv = 1; KERN_DEBUG (scrdebug, SCRPROBE_DEBUG_INFO,("scrprobe: successful \n")); } return (rv); } /* End scrprobe() */ /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrattach ** ** Initialize the clock and state machines ** ** FORMAL PARAMETERS: ** ** parent - input : pointer to my parents device structure. ** self - output : pointer to my softc with device structure at front. ** aux - input : pointer to the isa_attach_args structure. ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** scrconsinit - clock callout functions set ** state machines all at idle ** ** FUNCTION VALUE: ** ** none. ** ** SIDE EFFECTS: ** ** none. **-- */ void scrattach(parent, self, aux) struct device *parent; struct device *self; void *aux; { struct scr_softc *sc = (void *)self; printf("\n"); if (!strcmp(parent->dv_cfdata->cf_driver->cd_name, "ofisascr")) { KERN_DEBUG (scrdebug, SCRATTACH_DEBUG_INFO,("scrattach: called \n")); /* set initial state machine values */ scrClkInit(sc); initStates(sc); sc->open = FALSE; } else { panic("scrattach: not on an ISA bus, attach impossible"); } /* End else we aren't on ISA and we can't handle it */ return; } /* End scrattach() */ /* **++ ** FUNCTIONAL DESCRIPTION: ** ** initStates ** ** sets the state of all machines to idle ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void initStates(struct scr_softc * sc) { sc->masterS = msIdleOff; sc->t0RecvS = t0rsIdle; sc->t0SendS = t0ssIdle; sc->coldResetS = crsIdle; sc->ATRS = atrsIdle; sc->t0RecvByteS = t0rbsIdle; sc->t0SendByteS = t0sbsIdle; } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrOpen ** ** Opens the driver. We only let the device be opened ** once for security reasons ** ** FORMAL PARAMETERS: ** ** dev - input : Device identifier consisting of major and minor numbers. ** flag - input : Indicates if this is a blocking I/O call. ** mode - not used. ** p - input : Pointer to the proc structure of the process ** performing the open. ** ** IMPLICIT INPUTS: ** ** none. ** ** IMPLICIT OUTPUTS: ** ** none. ** ** FUNCTION VALUE: ** ** ENXIO - invalid device specified for open. ** EBUSY - The unit is already open ** ** SIDE EFFECTS: ** ** none. **-- */ int scropen(dev, flag, mode, p) dev_t dev; int flag; int mode; struct proc *p; { int unit = SCRUNIT(dev); struct scr_softc *sc; KERN_DEBUG (scrdebug, SCROPEN_DEBUG_INFO, ("scropen: called with minor device %d and flag 0x%x\n", unit, flag)); /* Sanity check the minor device number we have been instructed ** to open and set up our softc structure pointer. */ if (unit >= scr_cd.cd_ndevs) { KERN_DEBUG (scrdebug, SCROPEN_DEBUG_INFO,("\t scropen, return ENXIO\n")); return (ENXIO); } sc = scr_cd.cd_devs[unit]; if (!sc) { KERN_DEBUG (scrdebug, SCROPEN_DEBUG_INFO,("\t scropen, return ENXIO\n")); return (ENXIO); } // david,jim - remove ifdef this when NCI can cope with only 1 open #if 0 if (sc->open) { KERN_DEBUG (scrdebug, SCROPEN_DEBUG_INFO,("\t scropen, return EBUSY\n")); return (EBUSY); } /* set all initial conditions */ sc->open = TRUE; #endif KERN_DEBUG (scrdebug, SCROPEN_DEBUG_INFO,("scropen: success \n")); /* Now invoke the line discipline open routine */ return 0; } /* End scropen() */ /* **++ ** FUNCTIONAL DESCRIPTION: ** ** This function closed the driver ** ** FORMAL PARAMETERS: ** ** dev - input : Device identifier consisting of major and minor numbers. ** flag - Not used. ** mode - Not used. ** p - Not used. ** ** IMPLICIT INPUTS: ** ** scr_cd - used to locate the softc structure for the device unit ** identified by dev. ** ** IMPLICIT OUTPUTS: ** ** The device is put into an idle state. ** ** FUNCTION VALUE: ** ** 0 - Always returns success. ** ** SIDE EFFECTS: ** ** none. **-- */ int scrclose(dev, flag, mode, p) dev_t dev; int flag; int mode; struct proc *p; { #if 0 int unit = SCRUNIT(dev); struct scr_softc *sc = scr_cd.cd_devs[unit]; #endif KERN_DEBUG (scrdebug, SCRCLOSE_DEBUG_INFO, ("scrclose: called for minor device %d flag 0x%x\n", SCRUNIT(dev), flag)); // david,jim - remove ifdef this when NCI can cope with only 1 open #if 0 /* Check we are open in the first place */ if (sc->open) { /* put everything in the idle state */ scrClkInit(sc); initStates(sc); sc->open = FALSE; } else { KERN_DEBUG (scrdebug, SCRCLOSE_DEBUG_INFO,("\t scrclose, device not open\n")); } #endif KERN_DEBUG (scrdebug, SCRCLOSE_DEBUG_INFO,("scrclose exiting\n")); return(0); } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrwrite ** ** not supported ** ** FORMAL PARAMETERS: ** ** dev - input : Device identifier consisting of major and minor numbers. ** uio - input : Pointer to the user I/O information (ie. write data). ** flag - input : Information on how the I/O should be done (eg. blocking ** or non-blocking). ** ** IMPLICIT INPUTS: ** ** ** IMPLICIT OUTPUTS: ** ** none ** ** FUNCTION VALUE: ** ** Returns ENODEV ** ** SIDE EFFECTS: ** ** none **-- */ int scrwrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { return ENODEV; } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrread ** ** not supported ** ** FORMAL PARAMETERS: ** ** dev - input : Device identifier consisting of major and minor numbers. ** uio - input : Pointer to the user I/O information (ie. read buffer). ** flag - input : Information on how the I/O should be done (eg. blocking ** or non-blocking). ** ** IMPLICIT INPUTS: ** ** ** IMPLICIT OUTPUTS: ** ** none ** ** FUNCTION VALUE: ** ** Returns ENODEV ** ** SIDE EFFECTS: ** ** none **-- */ int scrread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { return ENODEV; } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrstop ** ** should not be called ** ** FORMAL PARAMETERS: ** ** tp - Pointer to our tty structure. ** flag - Ignored. ** ** IMPLICIT INPUTS: ** ** none. ** ** IMPLICIT OUTPUTS: ** ** none. ** ** FUNCTION VALUE: ** ** none. ** ** SIDE EFFECTS: ** ** none. **-- */ void scrstop(tp, flag) struct tty *tp; int flag; { panic("scrstop: not implemented"); } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** tty ** ** should not be called ** ** FORMAL PARAMETERS: ** ** dev - input : Device identifier consisting of major and minor numbers. ** ** IMPLICIT INPUTS: ** ** ** IMPLICIT OUTPUTS: ** ** none ** ** FUNCTION VALUE: ** ** null ** ** SIDE EFFECTS: ** ** none. **-- */ struct tty * scrtty(dev) dev_t dev; { panic("scrtty: not implemented"); return NULL; } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** This routine is responsible for performing I/O controls. ** ** There are 4 commands. Status, On, T0 and Off. ** ** Status checks to see if the card is inserted. This command ** does not use the state machines ** ** On turns the card on and gets the ATR sequence from the card. ** This command does use the state machines ** ** T0 is used to read and write the card. This command does use ** the state machines ** ** Off turns the card off. This command does not use the state ** machines. ** ** ** FORMAL PARAMETERS: ** ** dev - input : Device identifier consisting of major and minor numbers. ** cmd - input : The requested IOCTL command to be performed. ** See scrio.h for details ** ** ** Bit Position { 3322222222221111111111 ** { 10987654321098765432109876543210 ** Meaning | DDDLLLLLLLLLLLLLGGGGGGGGCCCCCCCC ** ** D - Command direction, in/out/both. ** L - Command argument length. ** G - Command group, 't' used for tty. ** C - Actual command enumeration. ** ** data - input/output : Direction depends on the command. ** flag - input : Not used by us but passed to line discipline and ttioctl ** p - input : pointer to proc structure of user. ** ** IMPLICIT INPUTS: ** ** none. ** ** IMPLICIT OUTPUTS: ** ** sc->masterS state of master state machine ** ** ** FUNCTION VALUE: ** ** ENOTTY if not correct ioctl ** ** ** SIDE EFFECTS: ** **-- */ int scrioctl(dev, cmd, data, flag, p) dev_t dev; u_long cmd; caddr_t data; int flag; struct proc *p; { int unit = SCRUNIT(dev); struct scr_softc* sc = scr_cd.cd_devs[unit]; int error = 0; /* error value returned */ int masterDoneRetries= 0; /* nuber of times we looked at masterDone */ int done; /* local copy of masterDone */ ScrStatus * pIoctlStatus; /* pointer to status ioctl */ ScrOff * pIoctlOff; /* pointer to off ioctl */ u_int savedInts; /* saved interrupts */ int s; /* saved spl value */ KERN_DEBUG (scrdebug, SCRIOCTL_DEBUG_INFO, ("scrioctl: called for device 0x%x, command 0x%lx, " "flag 0x%x\n", unit, cmd, flag)); switch (cmd) { /* ** get the status of the card, ie is it in, in but off, in and on */ case SCRIOSTATUS: pIoctlStatus = (ScrStatus*)data; if (scrGetDetect()) { savedInts = disable_interrupts(I32_bit | F32_bit); if (sc->masterS == msIdleOn) { pIoctlStatus->status = CARD_ON; } else { ASSERT(sc->masterS == msIdleOff); pIoctlStatus->status = CARD_INSERTED; } restore_interrupts(savedInts); } else { pIoctlStatus->status = CARD_REMOVED; } break; /* ** turn the card on and get the ATR sequence */ case SCRIOON: sc->pIoctlOn = (ScrOn*)data; // acquire the hat lock. while (1) { s = splhigh(); if(!hatLock) { hatLock = TRUE; splx(s); break; } splx(s); tsleep(&tsleepIdent ,PZERO,"hat", 1); } // check to see if the card is in if(!scrGetDetect()) { initStates(sc); cardOff(sc); // do not call scrClkInit() as it is idle already sc->pIoctlOn->status = ERROR_CARD_REMOVED; } // check to see if we are already on else if(sc->masterS == msIdleOn) { sc->pIoctlOn->status = ERROR_CARD_ON; } // card was in, card is off, so lets start it else { // set up the top half sc->masterDone = FALSE; sc->bigTrouble = FALSE; /* david/jim, remove this when the dust settles */ // start bottom half scrClkStart (sc,400); savedInts = disable_interrupts(I32_bit | F32_bit); masterSM(sc,mcOn); restore_interrupts(savedInts); // see if bottom half done while (1) { // check that we have not looped too many times if(masterDoneRetries >= MAX_FIQ_TIME * HZ) { //printf("MAX_FIQ_TIME reached \n"); // big problems, so reset bottom savedInts = disable_interrupts(I32_bit | F32_bit); scrClkInit(); initStates(sc); cardOff(sc); sc->status = ERROR_CARD_REMOVED; sc->masterDone = TRUE; restore_interrupts(savedInts); // dont stop clock, done at bottom of case } masterDoneRetries ++; // get done bit savedInts = disable_interrupts(I32_bit | F32_bit); done = sc->masterDone; restore_interrupts(savedInts); // see if all done if(done) { break; } // wait for a while tsleep(&tsleepIdent ,PZERO,"hat", 1); } // stop bottom half scrClkStop(); /* need to fix up count bits in non hat interrupt time, so */ if (sc->status == ERROR_OK) { sc->clkCountStartRecv = CLK_COUNT_START; sc->clkCountDataRecv = sc->clkCountStartRecv * START_2_DATA; sc->clkCountDataSend = CLK_COUNT_DATA; } /* takes while to turn off all lines, so keep out of hat */ if (sc->masterS != msIdleOn) { cardOff(sc); } // get the status back from the state machine sc->pIoctlOn->status = sc->status; } // release the hat lock. s = splhigh(); ASSERT(hatlock); hatLock = FALSE; splx(s); // david,jim hack to stop ioctl memcpy problem, to be removed when problem fixed ejg if (sc->pIoctlOn->status != ERROR_OK) { sc->pIoctlOn->atrLen = 0; } break; /* ** turn the card off */ case SCRIOOFF: pIoctlOff = (ScrOff*)data; // card off does not requires any state processing, so do work here initStates(sc); cardOff(sc); // do not call scrClkInit() as it is idle already pIoctlOff->status = ERROR_OK; break; /* ** do a T0 read or write */ case SCRIOT0: sc->pIoctlT0 = (ScrT0*)data; // acquire the hat lock. while (1) { s = splhigh(); if(!hatLock) { hatLock = TRUE; splx(s); break; } splx(s); tsleep(&tsleepIdent ,PZERO,"hat", 1); } // check to see if the card is in if(!scrGetDetect()) { initStates(sc); cardOff(sc); // do not call scrClkInit() as it is idle already sc->pIoctlT0->status = ERROR_CARD_REMOVED; } // check to see if card is off else if(sc->masterS == msIdleOff) { sc->pIoctlT0->status = ERROR_CARD_OFF; } // card was in, card is on, lets do command else { // set up the top half sc->masterDone = FALSE; sc->bigTrouble = FALSE; /* david/jim, remove this when the dust settles */ // start bottom half scrClkStart (sc,sc->clkCountDataSend); savedInts = disable_interrupts(I32_bit | F32_bit); if (sc->pIoctlT0->writeBuffer) { masterSM(sc,mcT0DataSend); } else { masterSM(sc,mcT0DataRecv); } restore_interrupts(savedInts); // see if bottom half done while (1) { // check that we have not looped too many times if(masterDoneRetries >= MAX_FIQ_TIME * HZ) { //printf("MAX_FIQ_TIME reached \n"); // big problems, so reset bottom savedInts = disable_interrupts(I32_bit | F32_bit); scrClkInit(); initStates(sc); cardOff(sc); sc->status = ERROR_CARD_REMOVED; sc->masterDone = TRUE; restore_interrupts(savedInts); } masterDoneRetries ++; // get done bit savedInts = disable_interrupts(I32_bit | F32_bit); done = sc->masterDone; restore_interrupts(savedInts); // see if all done if(done) { break; } // wait for a while tsleep(&tsleepIdent ,PZERO,"hat", 1); } // stop bottom half scrClkStop(); // get the status back from the state machine sc->pIoctlT0->status = sc->status; } // release the hat lock. s = splhigh(); hatLock = FALSE; splx(s); // david, jim hack to stop ioctl memcpy problem, to be removed when problem fixed ejg if (sc->pIoctlT0->status != ERROR_OK) { sc->pIoctlT0->dataLen = 0; } break; default: KERN_DEBUG (scrdebug, SCRIOCTL_DEBUG_INFO,("\t scrioctl: unknown command, ENOTTY \n")); error = ENOTTY; break; } KERN_DEBUG (scrdebug, SCRIOCTL_DEBUG_INFO, ("scrioctl: exiting with sc->status %d\n", error)); return (error); } /* End scrioctl */ /* ** ** All functions below this point are the bottom half of the driver ** ** All are called during a FIQ, except for some functions in masterSM which ** provides the interface between the bottom half and top half of ** the driver (nb masterDone() helps masterSM() out with this interface ** between top and bottom parts of the driver. ** */ /* **++ ** FUNCTIONAL DESCRIPTION: ** ** masterSM ** ** This state machine implements the top level state control It ** receives commands to turn the card on, and do T0 reads and T0 writes ** from the scrioctl. It then calls mid level state machine to action ** these commands. ** ** This machine is the only machine to keep state between scrioctl calls. ** Between calls, the state will be either msIdleOff, or msIdleOn. msIdleOff ** indicates that no signals are applied to the card. msidleOn indicates that ** power and clock are supplied to the card, and that the card has performed ** a successful ATR sequence. ** ** This routine gets called during FIQ interrupts and from scrioctl. It is a ** requirement that the scrioctl disables interrupts before calling this function. ** ** NB:- there is no way for the machine to get from msIdleOn to msIdleOff. Since ** this is just a mater of turning all signals off and resetting state machines, ** scrioctl takes a shortcut and resets everything itself. Ie it hits everything ** with a big hammer!! ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** cmd - command to the state machine, can be from ioctl, or mid level SM ** ** IMPLICIT INPUTS: ** ** sc->masterS state of this machine ** sc->pIoctlT0 pointer to T0 ioctl ** ** IMPLICIT OUTPUTS: ** ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** power and clock applied to card if successful ATR **-- */ static void masterSM(struct scr_softc * sc,int cmd) { if (sc->bigTrouble) return; // david,jim , remove this when dust settles switch (sc->masterS) { case msIdleOff: switch (cmd) { case mcOn: if (scrGetDetect()) { /* ** the card is off, and we want it on */ /* set initial values */ sc->status = 0; sc->convention = CONVENTION_UNKOWN; sc->protocolType = 0; sc->N = N_DEFAULT; sc->Fi = Fi_DEFAULT; sc->Di = Di_DEFAULT; sc->Wi = Wi_DEFAULT; sc->cardFreq = CARD_FREQ_DEF; sc->clkCountStartRecv = CLK_COUNT_START; sc->clkCountDataRecv = sc->clkCountStartRecv * START_2_DATA; sc->clkCountDataSend = CLK_COUNT_DATA; /* get coldResetSM to turn on power, clock, reset */ sc->masterS = msColdReset; coldResetSM(sc,crcStart); } else { /* card not inserted, so just set status and give up */ sc->status = ERROR_CARD_REMOVED; sc->masterDone = TRUE; } break; default: INVALID_STATE_CMD(sc,sc->masterS,cmd); break; } break; case msColdReset: switch (cmd) { case mcColdReset: /* ** coldResetSM has turned on power, clock , reset ** tell ATRSM to get the ATR sequence from the card */ sc->masterS = msATR; ATRSM(sc,atrcStart); break; default: INVALID_STATE_CMD(sc,sc->masterS,cmd); break; } break; case msATR: switch (cmd) { case mcATR: /* ** ATRSM has tried to get ATR sequence, so give ** back results to scrioctl. ATR sequence data ** was copied directly into ioctl data area, so ** no need to copy data */ if(sc->status == ERROR_OK) { sc->masterS = msIdleOn; } else { sc->masterS = msIdleOff; } sc->masterDone = TRUE; break; default: INVALID_STATE_CMD(sc,sc->masterS,cmd); break; } break; case msIdleOn: switch (cmd) { // nb there is no command to go to the IdleOff state. This // is a reset of the state machine, so is done in ioctl case mcT0DataSend: /* ** card is on, and we want to T0 Send, so ** as t0SendSM to do work */ sc->status = ERROR_OK; sc->masterS = msT0Send; t0SendSM(sc,t0scStart); break; case mcT0DataRecv: /* ** card is on, and we want to T0 Recv, so ** as t0RecvSM to do work */ sc->status = ERROR_OK; sc->masterS = msT0Recv; t0RecvSM(sc,t0rcStart); break; default: INVALID_STATE_CMD(sc,sc->masterS,cmd); break; } break; case msT0Send: switch (cmd) { case mcT0Send: /* ** t0SendSM has tried to send , so lets give back results */ sc->masterS = msIdleOn; sc->masterDone = TRUE; break; default: INVALID_STATE_CMD(sc,sc->masterS,cmd); break; } break; case msT0Recv: switch (cmd) { case mcT0Recv: /* ** t0RecvSM has tried to recv , so lets give back results ** data was written directly into ioctl data area, so we ** do not need to copy any data */ sc->pIoctlT0->dataLen = sc->dataCount; sc->masterS = msIdleOn; sc->masterDone = TRUE; break; default: INVALID_STATE_CMD(sc,sc->masterS,cmd); break; } break; default: INVALID_STATE_CMD(sc,sc->masterS,cmd); break; } } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** t0SendSM ** ** This is the T=0 Send State Machine. It is responsible ** for performing the send part of the ISO 7816-3 T=0 ** protocol. It is mid level protocol state machine. ** ** Once started, this machine is driven entirely via the ** FIQ/timeout structure . ** ** ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** cmd - command to this machine ** ** IMPLICIT INPUTS: ** ** sc->t0SendS state of this machine ** sc->pIoctlT0->command command to send to card ** sc->pIoctlT0->data data to send to card ** ** IMPLICIT OUTPUTS: ** ** sc->status error status from this machine ** sc->pIoctlT0->sw1 command status from card ** sc->pIoctlT0->sw2 command status from card ** sc->status error status from this machine ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void t0SendSM (struct scr_softc * sc, int cmd) { if (sc->bigTrouble) return; // david,jim , remove this when dust settles /* ** check for major failures that are common to most states */ if (cmd == t0scTWorkWaiting || cmd == gcT0RecvByteErr || cmd == gcT0SendByteErr ) { switch(cmd) { case t0scTWorkWaiting: ASSERT(sc->t0SendS != t0ssIdle); /* kill all lower machines */ t0SendByteSM(sc,t0sbcAbort); t0RecvByteSM(sc,t0rbcAbort); /* set status */ sc->status = ERROR_WORK_WAITING; break; case gcT0RecvByteErr: // fall through case gcT0SendByteErr: scrUntimeout(t0SendSM, sc, t0scTWorkWaiting); // done set status, already set in lower machine break; default: INVALID_STATE_CMD(sc, sc->t0SendS,cmd); break; } /* change states */ sc->t0SendS = t0ssIdle; masterSM(sc,mcT0Send); return; } switch (sc->t0SendS) { case t0ssIdle: switch (cmd) { case t0scStart: /* set initial values */ sc->t0SendS = t0ssSendHeader; sc->t0ByteParent = t0SendSM; sc->commandCount = 0; sc->dataCount = 0; sc->dataMax = sc->pIoctlT0->command[CMD_BUF_DATA_LEN_OFF]; sc->dataByte = sc->pIoctlT0->command[sc->commandCount]; // get a byte t0SendByteSM(sc,t0sbcStart); break; default: INVALID_STATE_CMD(sc, sc->t0SendS,cmd); break; } break; case t0ssSendHeader: switch (cmd) { case gcT0SendByte: sc->commandCount++; if (sc->commandCount < CMD_BUF_LEN) { sc->dataByte = sc->pIoctlT0->command[sc->commandCount]; t0SendByteSM(sc,t0sbcStart); } else { ASSERT(sc->commandCount == CMD_BUF_LEN); sc->t0SendS = t0ssRecvProcedure; scrTimeout(t0SendSM,sc,t0scTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } break; default: INVALID_STATE_CMD(sc, sc->t0SendS,cmd); break; } break; case t0ssRecvProcedure: switch (cmd) { case gcT0RecvByte: scrUntimeout(t0SendSM, sc,t0scTWorkWaiting); /* see if we should send all remaining bytes */ if ( (sc->dataByte == sc->pIoctlT0->command[CMD_BUF_INS_OFF]) || (sc->dataByte == (sc->pIoctlT0->command[CMD_BUF_INS_OFF] ^ 0x01)) ) { ASSERT(sc->dataCount < sc->dataMax); sc->t0SendS = t0ssSendData; sc->dataByte = sc->pIoctlT0->data[sc->dataCount]; t0SendByteSM(sc,t0sbcStart); sc->dataCount++; } /* see if we should send one data byte */ else if ((sc->dataByte == (sc->pIoctlT0->command[CMD_BUF_INS_OFF] ^ 0xFF)) || (sc->dataByte == (sc->pIoctlT0->command[CMD_BUF_INS_OFF] ^ 0xFE)) ) { ASSERT(sc->dataCount < sc->dataMax); sc->t0SendS = t0ssSendByte; sc->dataByte = sc->pIoctlT0->data[ sc->dataCount]; t0SendByteSM(sc,t0sbcStart); sc->dataCount++; } /* see if we should extend the work waiting period */ else if (sc->dataByte == 0x60) { t0RecvByteSM(sc,t0rbcStart); scrTimeout(t0SendSM,sc,t0scTWorkWaiting,T_WORK_WAITING); } #ifdef ORIGINAL_SW1_CODE /* XXX XXX XXX cgd */ /* see if we have a SW1 byte */ else if ( ((sc->dataByte & 0xf0) == 0x60) || ((sc->dataByte & 0xf0) == 0x90) && sc->dataByte != 0x60) #else /* XXX XXX XXX cgd */ /* see if we have a SW1 byte */ else if ( ( ((sc->dataByte & 0xf0) == 0x60) || ((sc->dataByte & 0xf0) == 0x90) ) && sc->dataByte != 0x60) #endif /* XXX XXX XXX cgd */ { sc->pIoctlT0->sw1 = sc->dataByte; sc->t0SendS = t0ssRecvSW2; t0RecvByteSM(sc,t0rbcStart); scrTimeout(t0SendSM,sc,t0scTWorkWaiting,T_WORK_WAITING); } /* got bad data byte, log error and get out */ else { sc->status = ERROR_BAD_PROCEDURE_BYTE; /* change state */ sc->t0SendS = t0ssIdle; masterSM(sc,mcT0Send); } break; default: INVALID_STATE_CMD(sc, sc->t0SendS,cmd); break; } break; case t0ssSendByte: switch (cmd) { case gcT0SendByte: if (sc->dataCount < sc->dataMax) { sc->t0SendS = t0ssRecvProcedure; } /* wait for sw1 byte */ else { ASSERT(sc->dataCount == sc->dataMax); sc->t0SendS = t0ssRecvSW1; } // ask for another byte t0RecvByteSM(sc,t0rbcStart); scrTimeout(t0SendSM,sc,t0scTWorkWaiting,T_WORK_WAITING); break; default: INVALID_STATE_CMD(sc, sc->t0SendS,cmd); break; } break; case t0ssSendData: switch (cmd) { case gcT0SendByte: /* send data */ if (sc->dataCount < sc->dataMax) { sc->t0SendS = t0ssSendData; sc->dataByte = sc->pIoctlT0->data[ sc->dataCount]; t0SendByteSM(sc,t0sbcStart); sc->dataCount++; } /* wait for sw1 byte */ else { ASSERT(sc->dataCount == sc->dataMax); sc->t0SendS = t0ssRecvSW1; t0RecvByteSM(sc,t0rbcStart); scrTimeout(t0SendSM,sc,t0scTWorkWaiting,T_WORK_WAITING); } break; default: INVALID_STATE_CMD(sc, sc->t0SendS,cmd); break; } break; case t0ssRecvSW1: switch (cmd) { case gcT0RecvByte: scrUntimeout(t0SendSM, sc,t0scTWorkWaiting); sc->pIoctlT0->sw1 = sc->dataByte; sc->t0SendS = t0ssRecvSW2; t0RecvByteSM(sc,t0rbcStart); scrTimeout(t0SendSM,sc,t0scTWorkWaiting,T_WORK_WAITING); break; default: INVALID_STATE_CMD(sc, sc->t0SendS,cmd); break; } break; case t0ssRecvSW2: switch (cmd) { case gcT0RecvByte: scrUntimeout(t0SendSM, sc,t0scTWorkWaiting); sc->pIoctlT0->sw2 = sc->dataByte; sc->t0SendS = t0ssIdle; masterSM(sc,mcT0Send); break; default: INVALID_STATE_CMD(sc, sc->t0SendS,cmd); break; } break; default: INVALID_STATE_CMD(sc, sc->t0SendS,cmd); break; } } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** t0RecvSM ** ** This is the T=0 Recv State Machine. It is responsible ** for performing the recv part of the ISO 7816-3 T=0 ** protocol. It is mid level protocol state machine. ** ** Once started, this machine is driven entirely via the ** FIQ/timeout structure . ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** cmd - command to this machine ** ** IMPLICIT INPUTS: ** ** sc->t0RecvS state of this machine ** sc->pIoctlT0->command command to send to card ** ** IMPLICIT OUTPUTS: ** ** sc->pIoctlT0->data data from card ** sc->pIoctlT0->dataLen size of data from card ** sc->pIoctlT0->sw1 command status from card ** sc->pIoctlT0->sw2 command status from card ** sc->status error status from this machine ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void t0RecvSM (struct scr_softc * sc,int cmd) { if (sc->bigTrouble) return; // david,jim , remove this when dust settles /* ** check for major failures that are common to most states */ if (cmd == t0rcTWorkWaiting || cmd == gcT0RecvByteErr || cmd == gcT0SendByteErr ) { switch(cmd) { case t0rcTWorkWaiting: ASSERT(sc->t0RecvS != t0rsIdle); /* kill all lower level machines */ t0SendByteSM(sc,t0sbcAbort); t0RecvByteSM(sc,t0rbcAbort); /* set status */ sc->status = ERROR_WORK_WAITING; break; case gcT0RecvByteErr: // fall through case gcT0SendByteErr: /* kill all the timers */ scrUntimeout(t0RecvSM, sc,t0rcTWorkWaiting); break; default: INVALID_STATE_CMD(sc, sc->t0RecvS,cmd); break; } /* change state */ sc->t0RecvS = t0rsIdle; masterSM(sc,mcT0Recv); /* all done */ return; } switch (sc->t0RecvS) { case t0rsIdle: switch (cmd) { case t0rcStart: /* set initial values */ sc->t0RecvS = t0rsSendHeader; sc->t0ByteParent = t0RecvSM; sc->commandCount = 0; sc->dataCount = 0; sc->dataMax = sc->pIoctlT0->command[CMD_BUF_DATA_LEN_OFF]; if (sc->dataMax == 0) { sc->dataMax = 256; } sc->dataByte = sc->pIoctlT0->command[sc->commandCount]; t0SendByteSM(sc,t0sbcStart); break; default: INVALID_STATE_CMD(sc, sc->t0RecvS,cmd); break; } break; case t0rsSendHeader: switch (cmd) { case gcT0SendByte: sc->commandCount++; if (sc->commandCount < CMD_BUF_LEN) { sc->dataByte = sc->pIoctlT0->command[sc->commandCount]; t0SendByteSM(sc,t0sbcStart); } else { ASSERT(sc->commandCount == CMD_BUF_LEN); sc->t0RecvS = t0rsRecvProcedure; scrTimeout(t0RecvSM,sc,t0rcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } break; default: INVALID_STATE_CMD(sc, sc->t0RecvS,cmd); break; } break; case t0rsRecvProcedure: switch (cmd) { case gcT0RecvByte: scrUntimeout(t0RecvSM, sc,t0rcTWorkWaiting); /* see if we should recv all remaining bytes */ if ( (sc->dataByte == sc->pIoctlT0->command[CMD_BUF_INS_OFF]) || (sc->dataByte == (sc->pIoctlT0->command[CMD_BUF_INS_OFF] ^ 0x01)) ) { ASSERT(sc->dataCount < sc->dataMax); sc->t0RecvS = t0rsRecvData; scrTimeout(t0RecvSM,sc,t0rcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } /* see if we should send one data byte */ else if ((sc->dataByte == (sc->pIoctlT0->command[CMD_BUF_INS_OFF] ^ 0xFF)) || (sc->dataByte == (sc->pIoctlT0->command[CMD_BUF_INS_OFF] ^ 0xFE)) ) { ASSERT(sc->dataCount < sc->dataMax); sc->t0RecvS = t0rsRecvByte; scrTimeout(t0RecvSM,sc,t0rcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } /* see if we should extend the work waiting period */ else if (sc->dataByte == 0x60) { t0RecvByteSM(sc,t0rbcStart); scrTimeout(t0RecvSM,sc,t0rcTWorkWaiting,T_WORK_WAITING); } #ifdef ORIGINAL_SW1_CODE /* XXX XXX XXX cgd */ /* see if we have a SW1 byte */ else if ( ((sc->dataByte & 0xf0) == 0x60) || ((sc->dataByte & 0xf0) == 0x90) && sc->dataByte != 0x60) #else /* XXX XXX XXX cgd */ /* see if we have a SW1 byte */ else if ( ( ((sc->dataByte & 0xf0) == 0x60) || ((sc->dataByte & 0xf0) == 0x90) ) && sc->dataByte != 0x60) #endif /* XXX XXX XXX cgd */ { sc->pIoctlT0->sw1 = sc->dataByte; sc->t0RecvS = t0rsRecvSW2; t0RecvByteSM(sc,t0rbcStart); scrTimeout(t0RecvSM,sc,t0rcTWorkWaiting,T_WORK_WAITING); } /* got bad data byte, log error and get out */ else { sc->status = ERROR_BAD_PROCEDURE_BYTE; /* change state */ sc->t0RecvS = t0rsIdle; masterSM(sc,mcT0Recv); } break; default: INVALID_STATE_CMD(sc, sc->t0RecvS,cmd); break; } break; case t0rsRecvByte: switch (cmd) { case gcT0RecvByte: /* clock in byte */ scrUntimeout(t0RecvSM, sc,t0rcTWorkWaiting); sc->pIoctlT0->data[sc->dataCount] = sc->dataByte; sc->dataCount++; if (sc->dataCount < sc->dataMax) { /* get procedure byte */ sc->t0RecvS = t0rsRecvProcedure; } else { ASSERT(sc->dataCount == sc->dataMax); sc->t0RecvS = t0rsRecvSW1; } // ask for another byte scrTimeout(t0RecvSM,sc,t0rcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); break; default: INVALID_STATE_CMD(sc, sc->t0RecvS,cmd); break; } break; case t0rsRecvData: switch (cmd) { case gcT0RecvByte: /* clock in data */ scrUntimeout(t0RecvSM, sc,t0rcTWorkWaiting); sc->pIoctlT0->data[sc->dataCount] = sc->dataByte; sc->dataCount++; /* decide if we have all data */ if (sc->dataCount >= sc->dataMax) { KERN_DEBUG (scrdebug, T0_RECV_SM_DEBUG_INFO,("\t\tt0RecvSM: changing state to t0rsRecvSW1\n",sc->dataByte)); ASSERT(sc->dataCount == sc->dataMax); sc->t0RecvS = t0rsRecvSW1; } /* ask for another byte */ scrTimeout(t0RecvSM,sc,t0rcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); break; default: INVALID_STATE_CMD(sc, sc->t0RecvS,cmd); break; } break; case t0rsRecvSW1: switch (cmd) { case gcT0RecvByte: scrUntimeout(t0RecvSM, sc,t0rcTWorkWaiting); sc->pIoctlT0->sw1 = sc->dataByte; sc->t0RecvS = t0rsRecvSW2; t0RecvByteSM(sc,t0rbcStart); scrTimeout(t0RecvSM,sc,t0rcTWorkWaiting,T_WORK_WAITING); break; default: INVALID_STATE_CMD(sc, sc->t0RecvS,cmd); break; } break; case t0rsRecvSW2: switch (cmd) { case gcT0RecvByte: scrUntimeout(t0RecvSM, sc,t0rcTWorkWaiting); sc->pIoctlT0->sw2 = sc->dataByte; sc->t0RecvS = t0rsIdle; masterSM(sc,mcT0Recv); break; default: INVALID_STATE_CMD(sc, sc->t0RecvS,cmd); break; } break; default: INVALID_STATE_CMD(sc, sc->t0RecvS,cmd); break; } } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** coldResetSM ** ** This state machine switches on the power, clock and reset pins ** in the correct order/timing. ** It is a low level bit-bashing state machine. ** ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** cmd - command to this machine ** ** IMPLICIT INPUTS: ** ** sc->coldResetS state of this machine ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** signals to card are on **-- */ static void coldResetSM(struct scr_softc * sc,int cmd) { if (sc->bigTrouble) return; // david,jim , remove this when dust settles switch (sc->coldResetS) { case crsIdle: switch (cmd) { case crcStart: scrSetReset(TRUE); scrSetClock(TRUE); scrSetDataHighZ(); scrSetPower(TRUE); /* start a t2 timer */ scrTimeout(coldResetSM,sc,crcT2,T_t2); sc->coldResetS = crsT2Wait; break; default: INVALID_STATE_CMD(sc,sc->masterS,cmd); break; } break; case crsT2Wait: switch (cmd) { case crcT2: /* turn off rst */ scrSetReset(FALSE); /* tell master state machine that we are all done */ sc->coldResetS = crsIdle; masterSM(sc,mcColdReset); break; default: INVALID_STATE_CMD(sc,sc->masterS,cmd); break; } break; default: INVALID_STATE_CMD(sc,sc->coldResetS,cmd); break; } } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** ATRSM ** ** This is the Answer To Reset State Machine. It is responsible ** for performing the Answer To Reset as specified in ISO 7816-3. ** It is mid level protocol state machine. ** ** Once started, this machine is driven entirely via the ** FIQ/timeout structure. ** ** ** During the first byte, we have to check if the card is operating ** at full speed or half speed. The first couple of bits are ** checked to see if it is 1/2 speed, and if so, the clock is changed ** and the state adjustes ** ** At the end of the first byte we have to determin the logic being ** used by the card, ie is it active high/low and msb/lsb. ** ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** cmd - command to this machine ** ** IMPLICIT INPUTS: ** ** sc->pIoctlAtr->atr data from card ** sc->pIoctlT0->sw1 command status from card ** sc->pIoctlT0->sw2 command status from card ** sc->status error status from this machine ** ** IMPLICIT OUTPUTS: ** ** sc->pIoctlOn->atrBuf data from ATR sequence ** sc->pIoctlOn->atrLen size of data from ATR sequence ** sc->status error status from this machine ** ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void ATRSM (struct scr_softc * sc,int cmd) { int lc; int tck; if (sc->bigTrouble) return; // david,jim , remove this when dust settles /* ** check for major failures that are common to most states */ if (cmd == atrcT3 || cmd == atrcTWorkWaiting || cmd == gcT0RecvByteErr ) { switch(cmd) { case atrcT3: scrUntimeout (ATRSM,sc,atrcTWorkWaiting); sc->status = ERROR_ATR_T3; t0RecvByteSM(sc,t0rbcAbort); break; case atrcTWorkWaiting: scrUntimeout (ATRSM,sc,atrcT3); sc->status = ERROR_WORK_WAITING; t0RecvByteSM(sc,t0rbcAbort); break; case gcT0RecvByteErr: scrUntimeout (ATRSM,sc,atrcT3); scrUntimeout (ATRSM,sc,atrcTWorkWaiting); /* done set status, its already set */ break; default: INVALID_STATE_CMD(sc,sc->ATRS,cmd); break; } /* change state */ sc->ATRS = atrsIdle; masterSM(sc,mcATR); return; } switch (sc->ATRS) { case atrsIdle: switch (cmd) { case atrcStart: /* lets start looking */ sc->ATRS = atrsTS; sc->pIoctlOn->atrLen = 0; sc->t0ByteParent = ATRSM; scrTimeout(ATRSM,sc,atrcT3,T_t3 *2); /* by 2 to accomodate 1/2 freq cards */ t0RecvByteSM(sc,t0rbcStart); break; default: INVALID_STATE_CMD(sc,sc->ATRS,cmd); break; } break; case atrsTS: switch (cmd) { case gcT0RecvByte: scrUntimeout(ATRSM,sc,atrcT3); sc->pIoctlOn->atrBuf[sc->pIoctlOn->atrLen] = sc->dataByte; sc->pIoctlOn->atrLen++; if(sc->pIoctlOn->atrLen >= ATR_BUF_MAX) { #ifdef SCR_DEBUG DEBUGGER; #endif sc->status = ERROR_ATR_TCK; sc->ATRS = atrsIdle; masterSM(sc,mcATR); } else { /* move onto recv T0 */ sc->ATRS = atrsT0; scrTimeout(ATRSM,sc,atrcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } break; default: INVALID_STATE_CMD(sc,sc->ATRS,cmd); break; } break; case atrsT0: switch (cmd) { case gcT0RecvByte: scrUntimeout(ATRSM,sc,atrcTWorkWaiting); sc->pIoctlOn->atrBuf[sc->pIoctlOn->atrLen] = sc->dataByte; sc->pIoctlOn->atrLen++; if(sc->pIoctlOn->atrLen >= ATR_BUF_MAX) { #ifdef SCR_DEBUG printf("atrLen >= ATR_BUF_MAX\n"); DEBUGGER; #endif sc->status = ERROR_ATR_TCK; sc->ATRS = atrsIdle; masterSM(sc,mcATR); } else { /* store Y & K */ sc->atrY = sc->dataByte & 0xf0; sc->atrK = sc->dataByte & 0x0f; sc->atrTAx = 1; sc->atrTBx = 1; sc->atrTCx = 1; sc->atrTDx = 1; sc->atrKCount = 1; /* if there are no TDx following set T0 protocol */ if (ISCLR(sc->atrY,ATR_Y_TD)) { sc->protocolType = PROTOCOL_T0; } if (sc->atrY) { sc->ATRS = atrsTABCD; scrTimeout(ATRSM,sc,atrcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } else if (sc->atrK) { sc->ATRS = atrsTK; scrTimeout(ATRSM,sc,atrcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } else if (sc->protocolType != PROTOCOL_T0) { sc->ATRS = atrsTCK; scrTimeout(ATRSM,sc,atrcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } else /* got all of ATR */ { sc->ATRS = atrsIdle; masterSM(sc,mcATR); } } break; default: INVALID_STATE_CMD(sc,sc->ATRS,cmd); break; } break; case atrsTABCD: switch (cmd) { case gcT0RecvByte: scrUntimeout(ATRSM,sc,atrcTWorkWaiting); sc->pIoctlOn->atrBuf[sc->pIoctlOn->atrLen] = sc->dataByte; sc->pIoctlOn->atrLen++; if(sc->pIoctlOn->atrLen >= ATR_BUF_MAX) { #ifdef SCR_DEBUG printf("atrLen >= ATR_BUF_MAX\n"); DEBUGGER; #endif sc->status = ERROR_ATR_TCK; sc->ATRS = atrsIdle; masterSM(sc,mcATR); } else { if (sc->atrY & ATR_Y_TA) { sc->atrY &= ~ATR_Y_TA; if (sc->atrTAx == 1) { sc->Fi = FI2Fi[((sc->dataByte >> 4) & 0x0f)]; if (sc->Fi == 0) { sc->status = ERROR_ATR_FI_INVALID; sc->Fi = Fi_DEFAULT; } sc->Di = DI2Di[(sc->dataByte & 0x0f)]; if (sc->Di == 0) { sc->status = ERROR_ATR_DI_INVALID; sc->Di = Di_DEFAULT; } } sc->atrTAx++; } else if (sc->atrY & ATR_Y_TB) { sc->atrY &= ~ATR_Y_TB; sc->atrTBx++; } else if (sc->atrY & ATR_Y_TC) { sc->atrY &= ~ATR_Y_TC; if (sc->atrTCx == 1) { sc->N = sc->dataByte; } if (sc->atrTCx == 2) { sc->Wi = sc->dataByte; } sc->atrTCx++; } else { ASSERT(sc->atrY & ATR_Y_TD); sc->atrY &= ~ATR_Y_TD; sc->atrTDx++; /* copy across the y section of TD */ sc->atrY = sc->dataByte; sc->atrY &= 0xf0; /* store protocols */ sc->protocolType = (1 << (sc->dataByte &0x0f)); } /* see what we should do next */ if (sc->atrY) { /* just stay in the same state */ scrTimeout(ATRSM,sc,atrcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } else if (sc->atrK) { sc->ATRS = atrsTK; scrTimeout(ATRSM,sc,atrcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } else if (sc->protocolType != PROTOCOL_T0) { sc->ATRS = atrsTCK; scrTimeout(ATRSM,sc,atrcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } else /* got all of ATR */ { sc->ATRS = atrsIdle; masterSM(sc,mcATR); } } break; default: INVALID_STATE_CMD(sc,sc->ATRS,cmd); break; } break; case atrsTK: switch (cmd) { case gcT0RecvByte: scrUntimeout(ATRSM,sc,atrcTWorkWaiting); sc->pIoctlOn->atrBuf[sc->pIoctlOn->atrLen] = sc->dataByte; sc->pIoctlOn->atrLen++; if(sc->pIoctlOn->atrLen >= ATR_BUF_MAX) { #ifdef SCR_DEBUG printf("atrLen >= ATR_BUF_MAX\n"); DEBUGGER; #endif sc->status = ERROR_ATR_TCK; sc->ATRS = atrsIdle; masterSM(sc,mcATR); } else { if (sc->atrKCount < sc->atrK) { sc->atrKCount++; scrTimeout(ATRSM,sc,atrcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } else if (sc->protocolType != PROTOCOL_T0) { sc->ATRS = atrsTCK; scrTimeout(ATRSM,sc,atrcTWorkWaiting,T_WORK_WAITING); t0RecvByteSM(sc,t0rbcStart); } else /* got all of ATR */ { sc->ATRS = atrsIdle; masterSM(sc,mcATR); } } break; default: INVALID_STATE_CMD(sc,sc->ATRS,cmd); break; } break; case atrsTCK: switch (cmd) { case gcT0RecvByte: scrUntimeout(ATRSM,sc,atrcTWorkWaiting); sc->pIoctlOn->atrBuf[sc->pIoctlOn->atrLen] = sc->dataByte; sc->pIoctlOn->atrLen++; if(sc->pIoctlOn->atrLen >= ATR_BUF_MAX) { #ifdef SCR_DEBUG printf("atrLen >= ATR_BUF_MAX\n"); DEBUGGER; #endif sc->status = ERROR_ATR_TCK; sc->ATRS = atrsIdle; masterSM(sc,mcATR); } else { tck = sc->pIoctlOn->atrBuf[0]; for (lc = 1; lc < sc->pIoctlOn->atrLen-1; lc++) { tck ^= sc->pIoctlOn->atrBuf[lc]; } if (tck == sc->pIoctlOn->atrBuf[sc->pIoctlOn->atrLen-1]) { sc->ATRS = atrsIdle; masterSM(sc,mcATR); } else { sc->status = ERROR_ATR_TCK; sc->ATRS = atrsIdle; masterSM(sc,mcATR); } } break; default: INVALID_STATE_CMD(sc,sc->ATRS,cmd); break; } break; default: INVALID_STATE_CMD(sc,sc->ATRS,cmd); break; } } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** t0RecvByteSM ** ** This state machine attempts to read 1 byte from a card. ** It is a low level bit-bashing state machine. ** ** Data from the card is async, so the machine scans at ** 5 times the data rate looking for a state bit. Once ** a start bit has been found, it waits for the middle of ** the bit and starts sampling at the bit rate. ** ** Several mid level machines can use this machine, so the value ** sc->t0ByteParent is used to point to back to the mid level machine ** ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** cmd - command to this machine ** ** IMPLICIT INPUTS: ** ** sc->t0RecvByteS state of this machine ** sc->t0ByteParent mid level machine that started this machine ** ** IMPLICIT OUTPUTS: ** ** sc->shiftByte byte read from the card ** sc->status error value if could not read byte ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void t0RecvByteSM(struct scr_softc* sc,int cmd) { if (sc->bigTrouble) return; // david,jim , remove this when dust settles if (cmd == t0rbcAbort) { /* kill all the timers */ scrUntimeout(t0RecvByteSM, sc,t0rbcTFindStartEdge); scrUntimeout(t0RecvByteSM, sc,t0rbcTFindStartMid); scrUntimeout(t0RecvByteSM, sc,t0rbcTClockData); scrUntimeout(t0RecvByteSM, sc,t0rbcTErrorStart); scrUntimeout(t0RecvByteSM, sc,t0rbcTErrorStop); scrSetDataHighZ(); sc->t0RecvByteS = t0rbsIdle; return; } switch (sc->t0RecvByteS) { case t0rbsIdle: switch (cmd) { case t0rbcStart: /* set initial conditions */ sc->shiftBits = 0; sc->shiftByte = 0; sc->shiftParity = 0; sc->shiftParityCount = 0; scrClkAdj(sc->clkCountStartRecv); /* recv data clock running at 5 times */ /* check if start bit is already here */ //if (scrGetData()) if (1) { /* didn't find it, keep looking */ scrTimeout(t0RecvByteSM,sc,t0rbcTFindStartEdge,sc->clkCountStartRecv); sc->t0RecvByteS = t0rbsFindStartEdge; } else { /* found start bit, look for mid bit */ scrTimeout(t0RecvByteSM,sc,t0rbcTFindStartMid,sc->clkCountStartRecv); sc->t0RecvByteS = t0rbsFindStartMid; } break; default: INVALID_STATE_CMD(sc, sc->t0RecvByteS,cmd); break; } break; case t0rbsFindStartEdge: switch (cmd) { case t0rbcTFindStartEdge: if (scrGetData()) { /* didn't find it, keep looking */ scrTimeout(t0RecvByteSM,sc,t0rbcTFindStartEdge,sc->clkCountStartRecv); } else { /* found start bit, look for mid bit */ scrTimeout(t0RecvByteSM,sc,t0rbcTFindStartMid,sc->clkCountStartRecv * 2); sc->t0RecvByteS = t0rbsFindStartMid; } break; default: INVALID_STATE_CMD(sc, sc->t0RecvByteS,cmd); break; } break; case t0rbsFindStartMid: switch (cmd) { case t0rbcTFindStartMid: if (scrGetData()) { /* found glitch, so just go back to hunting */ scrTimeout(t0RecvByteSM,sc,t0rbcTFindStartEdge,sc->clkCountStartRecv); sc->t0RecvByteS = t0rbsFindStartEdge; } else { /* found start bit, start clocking in data */ TOGGLE_TEST_PIN(); scrTimeout(t0RecvByteSM,sc,t0rbcTClockData,sc->clkCountDataRecv); sc->t0RecvByteS = t0rbsClockData; } break; default: INVALID_STATE_CMD(sc, sc->t0RecvByteS,cmd); break; } break; case t0rbsClockData: TOGGLE_TEST_PIN(); switch (cmd) { case t0rbcTClockData: if (sc->shiftBits < 8) { if (sc->convention == CONVENTION_INVERSE || sc->convention == CONVENTION_UNKOWN) { /* logic 1 is low, msb is first */ sc->shiftByte <<= 1; sc->shiftByte &= 0xfe; if (!scrGetData()) { sc->shiftByte |= 0x01; sc->shiftParity++; } } else { ASSERT(sc->convention == CONVENTION_DIRECT); /* logic 1 is high, lsb is first */ sc->shiftByte = sc->shiftByte >> 1; sc->shiftByte &= 0x7f; if (scrGetData()) { sc->shiftParity++; sc->shiftByte |= 0x80; } } sc->shiftBits++; /* in TS byte, check if we have a card that works at 1/2 freq */ if (sc->convention == CONVENTION_UNKOWN && /* in TS byte */ sc->shiftBits == 3 && /* test at bit 3 in word */ sc->shiftByte == 4 && /* check for 1/2 freq pattern */ sc->cardFreq == CARD_FREQ_DEF) /* only do this if at full freq */ { /* adjust counts down to 1/2 freq */ sc->cardFreq = CARD_FREQ_DEF / 2; sc->clkCountStartRecv = sc->clkCountStartRecv *2; sc->clkCountDataRecv = sc->clkCountDataRecv *2; sc->clkCountDataSend = sc->clkCountDataSend *2; /* adjust this so that we have clocked in only fist bit of TS */ sc->shiftParity = 0; sc->shiftByte = 0; sc->shiftBits = 1; scrTimeout(t0RecvByteSM,sc,t0rbcTClockData,(sc->clkCountDataRecv * 3) /4); } else { scrTimeout(t0RecvByteSM,sc,t0rbcTClockData,sc->clkCountDataRecv); } } /* clock in parity bit */ else if (sc->shiftBits == 8) { if (sc->convention == CONVENTION_INVERSE) { if (!scrGetData()) { sc->shiftParity++; } } else if (sc->convention == CONVENTION_DIRECT) { if (scrGetData()) { sc->shiftParity++; } } else { /* sc->convention not set so sort it out */ ASSERT(sc->convention == CONVENTION_UNKOWN); if (sc->shiftByte == CONVENIONT_INVERSE_ID && scrGetData()) { sc->convention = CONVENTION_INVERSE; sc->shiftParity = 0; /* force good parity */ } else if (sc->shiftByte == CONVENTION_DIRECT_ID && scrGetData()) { sc->shiftByte = CONVENTION_DIRECT_FIX; sc->convention = CONVENTION_DIRECT; sc->shiftParity = 0; /* force good parity */ } else { sc->shiftParity = 1; /* force bad parity */ } } if ((sc->shiftParity & 01) == 0) { sc->shiftBits++; scrTimeout(t0RecvByteSM,sc,t0rbcTClockData,sc->clkCountDataRecv); } else { /* got parity error */ if (sc->shiftParityCount < PARITY_ERROR_MAX) { sc->shiftParityCount++; scrTimeout(t0RecvByteSM,sc,t0rbcTErrorStart,sc->clkCountDataRecv); sc->t0RecvByteS = t0rbsSendError; } else { /* too many parity errors, just give up on this sc->dataByte */ sc->status = ERROR_PARITY; sc->t0RecvByteS = t0rbsIdle; sc->t0ByteParent(sc,gcT0RecvByteErr); } } } else { sc->dataByte = sc->shiftByte; sc->t0RecvByteS = t0rbsIdle; sc->t0ByteParent(sc,gcT0RecvByte); } break; default: INVALID_STATE_CMD(sc, sc->t0RecvByteS,cmd); break; } break; case t0rbsSendError: TOGGLE_TEST_PIN(); switch (cmd) { case t0rbcTErrorStart: /* start sending error bit */ scrSetData(FALSE); scrTimeout(t0RecvByteSM,sc,t0rbcTErrorStop,sc->clkCountDataRecv * 2); break; case t0rbcTErrorStop: /* stop sending parity error & reset information*/ scrSetData(TRUE); sc->shiftBits = 0; sc->shiftByte = 0; sc->shiftParity = 0; /* start looking for start bit */ scrTimeout(t0RecvByteSM,sc,t0rbcTFindStartEdge,1); sc->t0RecvByteS = t0rbsFindStartEdge; break; default: INVALID_STATE_CMD(sc, sc->t0RecvByteS,cmd); break; } break; default: INVALID_STATE_CMD(sc, sc->t0RecvByteS,cmd); break; } } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** t0SendByteSM ** ** This state machine writes 1 byte to a card. ** It is a low level bit-bashing state machine. ** ** ** Several mid level machines can use this machine, so the value ** sc->t0ByteParent is used to point to back to the mid level machine ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** cmd - command to this machine ** ** IMPLICIT INPUTS: ** ** sc->t0SendByteS state of this machine ** sc->shiftByte byte to write to the card ** ** IMPLICIT OUTPUTS: ** ** sc->status error value if could not read byte ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ //int bigTroubleTest = 0; static void t0SendByteSM (struct scr_softc * sc,int cmd) { //if(bigTroubleTest == 2000) //{ // INVALID_STATE_CMD(sc, sc->t0SendByteS,cmd); // bigTroubleTest = 0; //} // //bigTroubleTest++; if (sc->bigTrouble) return; // david,jim , remove this when dust settles if (cmd == t0sbcAbort) { /* kill all the timers */ scrUntimeout(t0SendByteSM, sc, t0sbcTGuardTime); scrUntimeout(t0SendByteSM, sc, t0sbcTClockData); scrUntimeout(t0SendByteSM, sc, t0sbcTError); scrSetDataHighZ(); return; } switch (sc->t0SendByteS) { case t0sbsIdle: switch (cmd) { case t0sbcStart: /* set initial conditions */ sc->shiftBits = 0; sc->shiftParity = 0; sc->shiftParityCount = 0; sc->shiftByte = sc->dataByte; scrClkAdj(sc->clkCountDataSend); /* send data clock running at 1 ETU */ /* check if we have to wait for guard time */ if (0) /* possible optimization here */ { /* can send start bit now */ scrTimeout(t0SendByteSM,sc,t0sbcTClockData,sc->clkCountDataSend); scrSetData(FALSE); sc->t0SendByteS = t0sbsClockData; } else { /* need to wait for guard time */ scrTimeout(t0SendByteSM,sc,t0sbcTGuardTime,sc->clkCountDataSend * (12 + sc->N)); sc->t0SendByteS = t0sbsWaitGuardTime; } break; default: INVALID_STATE_CMD(sc, sc->t0SendByteS,cmd); break; } break; case t0sbsWaitGuardTime: switch (cmd) { case t0sbcTGuardTime: TOGGLE_TEST_PIN(); /* set start bit */ scrTimeout(t0SendByteSM,sc,t0sbcTClockData,sc->clkCountDataSend); scrSetData(FALSE); sc->t0SendByteS = t0sbsClockData; break; default: INVALID_STATE_CMD(sc, sc->t0SendByteS,cmd); break; } break; case t0sbsClockData: switch (cmd) { case t0sbcTClockData: TOGGLE_TEST_PIN(); /* clock out data bit */ if (sc->shiftBits < 8) { if (sc->convention == CONVENTION_INVERSE) { if (sc->shiftByte & 0x80) { scrSetData(FALSE); sc->shiftParity++; } else { scrSetData(TRUE); } sc->shiftByte = sc->shiftByte << 1; } else { ASSERT(sc->convention == CONVENTION_DIRECT); if (sc->shiftByte & 0x01) { scrSetData(TRUE); sc->shiftParity++; } else { scrSetData(FALSE); } sc->shiftByte = sc->shiftByte >> 1; } sc->shiftBits++; scrTimeout(t0SendByteSM,sc,t0sbcTClockData,sc->clkCountDataSend); } /* clock out parity bit */ else if (sc->shiftBits == 8) { if ( ((sc->shiftParity & 0x01) && (sc->convention == CONVENTION_INVERSE)) || (!(sc->shiftParity & 0x01) && (sc->convention == CONVENTION_DIRECT)) ) { scrSetData(FALSE); } else { scrSetData(TRUE); } sc->shiftBits++; scrTimeout(t0SendByteSM,sc,t0sbcTClockData,sc->clkCountDataSend); } /* all data shifted out, move onto next state */ else { ASSERT(sc->shiftBits > 8); scrSetData(TRUE); scrTimeout(t0SendByteSM,sc,t0sbcTError,sc->clkCountDataSend); sc->t0SendByteS = t0sbsWaitError; } break; default: INVALID_STATE_CMD(sc, sc->t0SendByteS,cmd); break; } break; case t0sbsWaitError: switch (cmd) { case t0sbcTError: /* no error indicated*/ if (scrGetData()) { sc->t0SendByteS = t0sbsIdle; sc->t0ByteParent(sc,gcT0SendByte); } /* got error */ else { /* got parity error */ if (sc->shiftParityCount < PARITY_ERROR_MAX) { sc->shiftParityCount++; scrTimeout(t0SendByteSM,sc,t0sbcTResend,sc->clkCountDataSend * 2); sc->t0SendByteS = t0sbsWaitResend; } else { /* too many parity errors, just give up on this sc->dataByte */ sc->status = ERROR_PARITY; sc->t0SendByteS = t0sbsIdle; sc->t0ByteParent(sc,gcT0SendByteErr); } } break; default: INVALID_STATE_CMD(sc, sc->t0SendByteS,cmd); break; } break; case t0sbsWaitResend: switch (cmd) { case t0sbcTResend: sc->shiftBits = 0; sc->shiftParity = 0; sc->shiftByte = sc->dataByte; /* set start bit */ scrTimeout(t0SendByteSM,sc,t0sbcTClockData,sc->clkCountDataSend); scrSetData(FALSE); sc->t0SendByteS = t0sbsClockData; break; default: INVALID_STATE_CMD(sc, sc->t0SendByteS,cmd); break; } break; default: INVALID_STATE_CMD(sc, sc->t0SendByteS,cmd); break; } } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** cardOff ** ** Turn all signals to the card off ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void cardOff (struct scr_softc * sc) { scrSetReset(TRUE); scrSetDataHighZ(); scrSetClock(FALSE); scrSetPower(FALSE); } /* ** ** ** **************** timer routines *************** ** */ /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrClkInit ** ** Init the callout queues. The callout queues are used ** by the timeout/untimeout queues ** ** FORMAL PARAMETERS: ** ** nill ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void scrClkInit(void) { int lc; Callout *c; Callout *new; scrClkCallTodo.c_next = NULL; scrClkCallFree = &scrClkCalloutArray[0]; c = scrClkCallFree; for (lc = 1; lc < SCR_CLK_CALLOUT_COUNT; lc++) { new = &scrClkCalloutArray[lc]; c->c_next = new; c = new; } c->c_next = NULL; } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrClkStart ** ** This function starts the clock running. The clock is reall the ** HAT clock (High Available Timer) that is using a FIQ (fast interrupt ** request). ** ** FORMAL PARAMETERS: ** ** sc - Pointer to the softc structure. ** countPerTick - value for T2 timer that drives FIQ ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void scrClkStart(struct scr_softc * sc,int countPerTick) { u_int savedInts; savedInts = disable_interrupts(I32_bit | F32_bit); ASSERT(scrClkCallTodo.c_next == NULL); ASSERT(!scrClkEnable); scrClkEnable = 1; scrClkCount = countPerTick; hatClkOn(countPerTick, hatClkIrq, 0xdeadbeef, hatStack + HATSTACKSIZE - sizeof(unsigned), myHatWedge); restore_interrupts(savedInts); } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrClkAdj ** ** Adjusts the frequence of the clock ** ** FORMAL PARAMETERS: ** ** count - new value for T2 timer that drives FIQ ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void scrClkAdj (int count) { u_int savedInts; if (count != scrClkCount) { savedInts = disable_interrupts(I32_bit | F32_bit); ASSERT(scrClkEnable); scrClkCount = count; hatClkAdjust(count); restore_interrupts(savedInts); } } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrClkStop ** ** Stops the clock ** ** FORMAL PARAMETERS: ** ** nill ** ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void scrClkStop(void) { u_int savedInts; savedInts = disable_interrupts(I32_bit | F32_bit); ASSERT(scrClkEnable); scrClkEnable = 0; ASSERT(scrClkCallTodo.c_next == NULL); hatClkOff(); restore_interrupts(savedInts); } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** hatClkIrq ** ** This is what the HAT clock calls. This call drives ** the timeout queues, which in turn drive the state machines ** ** Be very carefully when calling a timeout as the function ** that is called may in turn do timeout/untimeout calls ** before returning ** ** FORMAL PARAMETERS: ** ** int x - not used ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** a timeout may be called if it is due **-- */ static void hatClkIrq(int x) { register Callout *p1; register int needsoft =0; register Callout *c; register int arg; register void (*func) __P((struct scr_softc*,int)); struct scr_softc * sc; ASSERT(scrClkEnable); for (p1 = scrClkCallTodo.c_next; p1 != NULL; p1 = p1->c_next) { p1->c_time -= scrClkCount; if (p1->c_time > 0) { break; } needsoft = 1; if (p1->c_time == 0) { break; } } if (needsoft) { while ((c = scrClkCallTodo.c_next) != NULL && c->c_time <= 0) { func = c->c_func; sc = c->c_sc; arg = c->c_arg; scrClkCallTodo.c_next = c->c_next; c->c_next = scrClkCallFree; scrClkCallFree = c; (*func)(sc,arg); } } } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** myHatWedge ** ** Called if the HAT timer becomes clogged/wedged. Not ** used by this driver, we let upper layers recover ** from this condition ** ** FORMAL PARAMETERS: ** ** int nFIQs - not used ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void myHatWedge(int nFIQs) { #ifdef DEBUG printf("myHatWedge: nFIQ = %d\n",nFIQs); #endif } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrTimeout ** ** Execute a function after a specified length of time. ** ** ** FORMAL PARAMETERS: ** ** ftn - function to execute ** sc - pointer to soft c ** arg - argument passed to function ** count - number of T2 counts for timeout ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void scrTimeout(ftn, sc, arg, count) void (*ftn) __P((struct scr_softc*,int)); struct scr_softc* sc; int arg; register int count; { register Callout *new, *p, *t; ASSERT(scrClkEnable); if (count <= 0) { count = 1; } /* Fill in the next free fcallout structure. */ if (scrClkCallFree == NULL) { panic("timeout table full"); } new = scrClkCallFree; scrClkCallFree = new->c_next; new->c_sc = sc; new->c_arg = arg; new->c_func = ftn; /* * The time for each event is stored as a difference from the time * of the previous event on the queue. Walk the queue, correcting * the counts argument for queue entries passed. Correct the counts * value for the queue entry immediately after the insertion point * as well. Watch out for negative c_time values; these represent * overdue events. */ for (p = &scrClkCallTodo; (t = p->c_next) != NULL && count > t->c_time; p = t) { if (t->c_time > 0) { count -= t->c_time; } } new->c_time = count; if (t != NULL) { t->c_time -= count; } /* Insert the new entry into the queue. */ p->c_next = new; new->c_next = t; } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** scrUntimeout ** ** Cancel previous timeout function call. ** ** FORMAL PARAMETERS: ** ** ftn - function of timeout to cancel ** sc - sc of timeout to cancel ** arg - arg of timeout to cancel ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ static void scrUntimeout(ftn, sc, arg) void (*ftn) __P((struct scr_softc*,int)); struct scr_softc* sc; int arg; { register Callout *p, *t; ASSERT(scrClkEnable); for (p = &scrClkCallTodo; (t = p->c_next) != NULL; p = t) { if (t->c_func == ftn && t->c_sc == sc && t->c_arg == arg) { /* Increment next entry's count. */ if (t->c_next && t->c_time > 0) { t->c_next->c_time += t->c_time; } /* Move entry from fcallout queue to scrClkCallFree queue. */ p->c_next = t->c_next; t->c_next = scrClkCallFree; scrClkCallFree = t; break; } } } /******************* routines used only during debugging */ #ifdef SCR_DEBUG /* **++ ** FUNCTIONAL DESCRIPTION: ** ** invalidStateCmd ** ** Debugging function. Printout information about problem ** and then kick in the debugger or panic ** ** FORMAL PARAMETERS: ** ** sc - pointer to soft c ** state - state of machine ** cmd - command of machine ** line - line that problem was detected ** ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ void invalidStateCmd (struct scr_softc* sc,int state,int cmd,int line) { printf("INVALID_STATE_CMD: sc = %X, state = %X, cmd = %X, line = %d\n",sc,state,cmd,line); DEBUGGER; } /* **++ ** FUNCTIONAL DESCRIPTION: ** ** getText ** ** Get text representation of state or command ** ** FORMAL PARAMETERS: ** ** x - state or command ** ** IMPLICIT INPUTS: ** ** nill ** ** IMPLICIT OUTPUTS: ** ** nill ** ** FUNCTION VALUE: ** ** nill ** ** SIDE EFFECTS: ** ** nill **-- */ char * getText(int x) { switch (x) { /* commands to Master State Machine (mc = Master Command )*/ case mcOn: return "mcOn"; case mcT0DataSend: return "mcT0DataSend"; case mcT0DataRecv: return "mcT0DataRecv"; case mcColdReset: return "mcColdReset"; case mcATR: return "mcATR"; case mcT0Send: return "mcT0Send"; case mcT0Recv: return "mcT0Recv"; /* states in Master state machine (ms = Master State) */ case msIdleOff: return "msIdleOff"; case msColdReset: return "msColdReset"; case msATR: return "msATR"; case msIdleOn: return "msIdleOn"; case msT0Send: return "msT0Send"; case msT0Recv: return "msT0Recv"; /* commands to T0 send state machine */ case t0scStart: return "t0scStart"; case t0scTWorkWaiting: return "t0scTWorkWaiting"; /* states in T0 send state machine */ case t0ssIdle: return "t0ssIdle"; case t0ssSendHeader: return "t0ssSendHeader"; case t0ssRecvProcedure: return "t0ssRecvProcedu"; case t0ssSendByte: return "t0ssSendByte"; case t0ssSendData: return "t0ssSendData"; case t0ssRecvSW1: return "t0ssRecvSW1"; case t0ssRecvSW2: return "t0ssRecvSW2"; /* commands to T0 recv state machine */ case t0rcStart: return "t0rcStart"; case t0rcTWorkWaiting: return "t0rcTWorkWaiting"; /* states in T0 recv state machine */ case t0rsIdle: return "t0rsIdle"; case t0rsSendHeader: return "t0rsSendHeader"; case t0rsRecvProcedure: return "t0rsRecvProcedure"; case t0rsRecvByte: return "t0rsRecvByte"; case t0rsRecvData: return "t0rsRecvData"; case t0rsRecvSW1: return "t0rsRecvSW1"; case t0rsRecvSW2: return "t0rsRecvSW2"; /* commands to Answer To Reset (ATR) state machine */ case atrcStart: return "atrcStart"; case atrcT3: return "0x0b04"; case atrcTWorkWaiting: return "atrcTWorkWaiting"; /* states in in Anser To Reset (ATR) state machine */ case atrsIdle: return "atrsIdle"; case atrsTS: return "atrsTS"; case atrsT0: return "atrsT0"; case atrsTABCD: return "atrsTABCD"; case atrsTK: return "atrsTK"; case atrsTCK: return "atrsTCK"; /* commands to T0 Recv Byte state machine */ case t0rbcStart: return "t0rbcStart"; case t0rbcAbort: return "t0rbcAbort"; case t0rbcTFindStartEdge:return "t0rbcTFindStartEdge"; case t0rbcTFindStartMid: return "t0rbcTFindStartMid"; case t0rbcTClockData: return "t0rbcTClockData"; case t0rbcTErrorStart: return "t0rbcTErrorStart"; case t0rbcTErrorStop: return "t0rbcTErrorStop"; /* states in in TO Recv Byte state machine */ case t0rbsIdle: return "t0rbsIdle"; case t0rbsFindStartEdge: return "t0rbcFindStartEdge"; case t0rbsFindStartMid: return "t0rbcFindStartMid"; case t0rbsClockData: return "t0rbcClockData"; case t0rbsSendError: return "t0rbcSendError"; /* commands to T0 Send Byte state machine */ case t0sbcStart: return "t0sbcStart"; case t0sbcAbort: return "t0sbcAbort"; case t0sbcTGuardTime: return "t0sbcTGuardTime"; case t0sbcTClockData: return "t0sbcTClockData"; case t0sbcTError: return "t0sbcTError"; case t0sbcTResend: return "t0sbcTResend"; /* states in in T0 Send Byte state machine */ case t0sbsIdle: return "t0sbsIdle"; case t0sbsClockData: return "t0sbsClockData"; case t0sbsWaitError: return "t0sbsWaitError"; case t0sbsWaitResend: return "t0sbsWaitResend"; case t0sbsWaitGuardTime: return "t0sbsWaitGuardTime"; case gcT0RecvByte: return "gcT0RecvByte"; case gcT0RecvByteErr: return "gcT0RecvByteErr"; case gcT0SendByte: return "gcT0SendByte"; case gcT0SendByteErr: return "gcT0SendByteErr"; case crcStart: return "crcStart"; case crcT2: return "crcT2"; default: printf("unkown case, %x\n",x); break; } return "???"; } #endif /* SCR_DEBUG */