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/* tmu.c
*
* Milkymist TMU driver for RTEMS
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*
* COPYRIGHT (c) 2010, 2011 Sebastien Bourdeauducq
*/
#define RTEMS_STATUS_CHECKS_USE_PRINTK
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <rtems.h>
#include <bsp.h>
#include <bsp/irq-generic.h>
#include <rtems/libio.h>
#include <rtems/status-checks.h>
#include "../include/system_conf.h"
#include "milkymist_tmu.h"
#define DEVICE_NAME "/dev/tmu"
static rtems_id done_sem;
static rtems_isr done_handler(rtems_vector_number n)
{
rtems_semaphore_release(done_sem);
lm32_interrupt_ack(1 << MM_IRQ_TMU);
}
rtems_device_driver tmu_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_status_code sc;
rtems_isr_entry dummy;
sc = rtems_io_register_name(DEVICE_NAME, major, 0);
RTEMS_CHECK_SC(sc, "create TMU device");
sc = rtems_semaphore_create(
rtems_build_name('T', 'M', 'U', ' '),
0,
RTEMS_SIMPLE_BINARY_SEMAPHORE,
0,
&done_sem
);
RTEMS_CHECK_SC(sc, "create TMU done semaphore");
rtems_interrupt_catch(done_handler, MM_IRQ_TMU, &dummy);
bsp_interrupt_vector_enable(MM_IRQ_TMU);
return RTEMS_SUCCESSFUL;
}
static void invalidate_l2(void)
{
volatile char *flushbase = (char *)FMLBRG_FLUSH_BASE;
int i, offset;
offset = 0;
for (i=0;i<FMLBRG_LINE_COUNT;i++) {
flushbase[offset] = 0;
offset += FMLBRG_LINE_LENGTH;
}
}
static bool invalidate_after;
static void tmu_start(struct tmu_td *td)
{
if (td->invalidate_before)
invalidate_l2();
MM_WRITE(MM_TMU_HMESHLAST, td->hmeshlast);
MM_WRITE(MM_TMU_VMESHLAST, td->vmeshlast);
MM_WRITE(MM_TMU_BRIGHTNESS, td->brightness);
MM_WRITE(MM_TMU_CHROMAKEY, td->chromakey);
MM_WRITE(MM_TMU_VERTICESADR, (unsigned int)td->vertices);
MM_WRITE(MM_TMU_TEXFBUF, (unsigned int)td->texfbuf);
MM_WRITE(MM_TMU_TEXHRES, td->texhres);
MM_WRITE(MM_TMU_TEXVRES, td->texvres);
MM_WRITE(MM_TMU_TEXHMASK, td->texhmask);
MM_WRITE(MM_TMU_TEXVMASK, td->texvmask);
MM_WRITE(MM_TMU_DSTFBUF, (unsigned int)td->dstfbuf);
MM_WRITE(MM_TMU_DSTHRES, td->dsthres);
MM_WRITE(MM_TMU_DSTVRES, td->dstvres);
MM_WRITE(MM_TMU_DSTHOFFSET, td->dsthoffset);
MM_WRITE(MM_TMU_DSTVOFFSET, td->dstvoffset);
MM_WRITE(MM_TMU_DSTSQUAREW, td->dstsquarew);
MM_WRITE(MM_TMU_DSTSQUAREH, td->dstsquareh);
MM_WRITE(MM_TMU_ALPHA, td->alpha);
MM_WRITE(MM_TMU_CTL, td->flags|TMU_CTL_START);
invalidate_after = td->invalidate_after;
}
static rtems_status_code tmu_finalize(void)
{
rtems_status_code sc;
sc = rtems_semaphore_obtain(done_sem, RTEMS_WAIT, 100);
if (sc != RTEMS_SUCCESSFUL)
return sc;
if (invalidate_after) {
invalidate_l2();
__asm__ volatile( /* Invalidate Level-1 data cache */
"wcsr DCC, r0\n"
"nop\n"
);
}
return RTEMS_SUCCESSFUL;
}
rtems_device_driver tmu_control(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_libio_ioctl_args_t *args = arg;
struct tmu_td *td = (struct tmu_td *)args->buffer;
rtems_status_code sc;
switch (args->command) {
case TMU_EXECUTE:
tmu_start(td);
sc = tmu_finalize();
break;
case TMU_EXECUTE_NONBLOCK:
tmu_start(td);
sc = RTEMS_SUCCESSFUL;
break;
case TMU_EXECUTE_WAIT:
sc = tmu_finalize();
break;
default:
sc = RTEMS_UNSATISFIED;
break;
}
if (sc == RTEMS_SUCCESSFUL)
args->ioctl_return = 0;
else
args->ioctl_return = -1;
return sc;
}
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