diff options
Diffstat (limited to 'c/src/lib/libbsp/m68k/dmv152/clock/ckinit.c')
-rw-r--r-- | c/src/lib/libbsp/m68k/dmv152/clock/ckinit.c | 111 |
1 files changed, 90 insertions, 21 deletions
diff --git a/c/src/lib/libbsp/m68k/dmv152/clock/ckinit.c b/c/src/lib/libbsp/m68k/dmv152/clock/ckinit.c index d5f0f5e023..8715cdcc26 100644 --- a/c/src/lib/libbsp/m68k/dmv152/clock/ckinit.c +++ b/c/src/lib/libbsp/m68k/dmv152/clock/ckinit.c @@ -19,36 +19,46 @@ */ #include <stdlib.h> - -#include <rtems.h> + #include <bsp.h> -#include <clockdrv.h> +#include <rtems/libio.h> rtems_unsigned32 Clock_isrs; /* ISRs until next tick */ volatile rtems_unsigned32 Clock_driver_ticks; /* ticks since initialization */ rtems_isr_entry Old_ticker; -rtems_device_driver Clock_initialize( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *pargp, - rtems_id tid, - rtems_unsigned32 *rval -) -{ - Install_clock( Clock_isr ); -} +void Clock_exit( void ); -void ReInstall_clock( - rtems_isr_entry clock_isr +#define CLOCK_VECTOR TIMER_VECTOR + +/* + * These are set by clock driver during its init + */ + +rtems_device_major_number rtems_clock_major = ~0; +rtems_device_minor_number rtems_clock_minor; + +/* + * ISR Handler + */ + +rtems_isr Clock_isr( + rtems_vector_number vector ) { - rtems_unsigned32 isrlevel = 0 ; + Clock_driver_ticks += 1; - rtems_interrupt_disable( isrlevel ); - (void) set_vector( clock_isr, TIMER_VECTOR, 1 ); - rtems_interrupt_enable( isrlevel ); + Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xE2 ); + Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0x22 ); + Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0xC6 ); + + if ( Clock_isrs == 1 ) { + rtems_clock_tick(); + Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000; + } + else + Clock_isrs -= 1; } void Install_clock( @@ -61,7 +71,7 @@ void Install_clock( Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000; if ( BSP_Configuration.ticks_per_timeslice ) { - Old_ticker = (rtems_isr_entry) set_vector( clock_isr, TIMER_VECTOR, 1 ); + Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 ); Z8x36_WRITE( TIMER, MASTER_CFG, 0xd4 ); Z8x36_READ ( TIMER, MASTER_INTR, data ); @@ -69,7 +79,7 @@ void Install_clock( Z8x36_WRITE( TIMER, CT1_TIME_CONST_MSB, 0x04 ); Z8x36_WRITE( TIMER, CT1_TIME_CONST_LSB, 0xCE ); Z8x36_WRITE( TIMER, CT1_MODE_SPEC, 0x83 ); - Z8x36_WRITE( TIMER, CNT_TMR_VECTOR, TIMER_VECTOR ); + Z8x36_WRITE( TIMER, CNT_TMR_VECTOR, CLOCK_VECTOR ); Z8x36_WRITE( TIMER, CT1_CMD_STATUS, 0x20 ); Z8x36_READ ( TIMER, MASTER_INTR, data ); Z8x36_WRITE( TIMER, MASTER_INTR, (data & 0xDA) | 0x80 ); @@ -87,6 +97,17 @@ void Install_clock( } } +void ReInstall_clock( + rtems_isr_entry clock_isr +) +{ + rtems_unsigned32 isrlevel = 0 ; + + rtems_interrupt_disable( isrlevel ); + (void) set_vector( clock_isr, CLOCK_VECTOR, 1 ); + rtems_interrupt_enable( isrlevel ); +} + void Clock_exit( void ) { rtems_unsigned8 data; @@ -99,3 +120,51 @@ void Clock_exit( void ) } } + +rtems_device_driver Clock_initialize( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *pargp +) +{ + Install_clock( Clock_isr ); + + /* + * make major/minor avail to others such as shared memory driver + */ + + rtems_clock_major = major; + rtems_clock_minor = minor; + + return RTEMS_SUCCESSFUL; +} + +rtems_device_driver Clock_control( + rtems_device_major_number major, + rtems_device_minor_number minor, + void *pargp +) +{ + rtems_libio_ioctl_args_t *args = pargp; + + if (args == 0) + goto done; + + /* + * This is hokey, but until we get a defined interface + * to do this, it will just be this simple... + */ + + if (args->command == rtems_build_name('I', 'S', 'R', ' ')) + { + Clock_isr(CLOCK_VECTOR); + } + else if (args->command == rtems_build_name('N', 'E', 'W', ' ')) + { + ReInstall_clock(args->buffer); + } + +done: + return RTEMS_SUCCESSFUL; +} + |