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/* usbinput.c
*
* Milkymist USB input devices 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.com/license/LICENSE.
*
* $Id$
*
* 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_usbinput.h"
static const unsigned char input_firmware[] = {
#include "softusb-input.h"
};
#include "comloc.h"
#define DEVICE_NAME "/dev/usbinput"
static int mouse_consume;
static int keyboard_consume;
static int midi_consume;
static rtems_id event_q;
static rtems_isr interrupt_handler(rtems_vector_number n)
{
unsigned char msg[8];
int i;
lm32_interrupt_ack(1 << MM_IRQ_USB);
while(mouse_consume != COMLOC_MEVT_PRODUCE) {
for(i=0;i<4;i++)
msg[i] = COMLOC_MEVT(4*mouse_consume+i);
rtems_message_queue_send(event_q, msg, 4);
mouse_consume = (mouse_consume + 1) & 0x0f;
}
while(keyboard_consume != COMLOC_KEVT_PRODUCE) {
for(i=0;i<8;i++)
msg[i] = COMLOC_KEVT(8*keyboard_consume+i);
rtems_message_queue_send(event_q, msg, 8);
keyboard_consume = (keyboard_consume + 1) & 0x07;
}
while(midi_consume != COMLOC_MIDI_PRODUCE) {
for(i=0;i<3;i++)
msg[i] = COMLOC_MIDI(4*midi_consume+i+1);
rtems_message_queue_send(event_q, msg, 3);
midi_consume = (midi_consume + 1) & 0x0f;
}
}
rtems_device_driver usbinput_initialize(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_status_code sc;
volatile unsigned int *usb_dmem
= (volatile unsigned int *)MM_SOFTUSB_DMEM_BASE;
volatile unsigned int *usb_pmem
= (volatile unsigned int *)MM_SOFTUSB_PMEM_BASE;
int i, nwords;
rtems_isr_entry dummy;
MM_WRITE(MM_SOFTUSB_CONTROL, SOFTUSB_CONTROL_RESET);
for(i=0;i<SOFTUSB_DMEM_SIZE/4;i++)
usb_dmem[i] = 0;
for(i=0;i<SOFTUSB_PMEM_SIZE/2;i++)
usb_pmem[i] = 0;
nwords = (sizeof(input_firmware)+1)/2;
for(i=0;i<nwords;i++)
usb_pmem[i] = ((unsigned int)(input_firmware[2*i]))
|((unsigned int)(input_firmware[2*i+1]) << 8);
MM_WRITE(MM_SOFTUSB_CONTROL, 0);
mouse_consume = 0;
keyboard_consume = 0;
midi_consume = 0;
sc = rtems_io_register_name(DEVICE_NAME, major, 0);
RTEMS_CHECK_SC(sc, "create USB input device");
sc = rtems_message_queue_create(
rtems_build_name('U', 'S', 'B', 'I'),
64,
8,
0,
&event_q
);
RTEMS_CHECK_SC(sc, "create USB event queue");
rtems_interrupt_catch(interrupt_handler, MM_IRQ_USB, &dummy);
bsp_interrupt_vector_enable(MM_IRQ_USB);
return RTEMS_SUCCESSFUL;
}
rtems_device_driver usbinput_open(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
uint32_t count;
rtems_message_queue_flush(event_q, &count);
return RTEMS_SUCCESSFUL;
}
rtems_device_driver usbinput_read(
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
)
{
rtems_libio_rw_args_t *rw_args = (rtems_libio_rw_args_t *)arg;
rtems_status_code sc;
if(rw_args->count < 8) {
rw_args->bytes_moved = 0;
return RTEMS_UNSATISFIED;
}
sc = rtems_message_queue_receive(
event_q,
rw_args->buffer,
(size_t *)&rw_args->bytes_moved,
RTEMS_WAIT,
RTEMS_NO_TIMEOUT
);
if(sc == RTEMS_SUCCESSFUL)
return RTEMS_SUCCESSFUL;
else {
rw_args->bytes_moved = 0;
return RTEMS_UNSATISFIED;
}
}
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