static int
zr36050_basic_test (struct zr36050 *ptr)
{
zr36050_write(ptr, ZR050_SOF_IDX, 0x00);
zr36050_write(ptr, ZR050_SOF_IDX + 1, 0x00);
if ((zr36050_read(ptr, ZR050_SOF_IDX) |
zr36050_read(ptr, ZR050_SOF_IDX + 1)) != 0x0000) {
dprintk(1,
KERN_ERR
"%s: attach failed, can't connect to jpeg processor!\n",
ptr->name);
return -ENXIO;
}
zr36050_write(ptr, ZR050_SOF_IDX, 0xff);
zr36050_write(ptr, ZR050_SOF_IDX + 1, 0xc0);
if (((zr36050_read(ptr, ZR050_SOF_IDX) << 8) |
zr36050_read(ptr, ZR050_SOF_IDX + 1)) != 0xffc0) {
dprintk(1,
KERN_ERR
"%s: attach failed, can't connect to jpeg processor!\n",
ptr->name);
return -ENXIO;
}
zr36050_wait_end(ptr);
if ((ptr->status1 & 0x4) == 0) {
dprintk(1,
KERN_ERR
"%s: attach failed, jpeg processor failed (end flag)!\n",
ptr->name);
return -EBUSY;
}
return 0; /* looks good! */
}
/* status is kept in datastructure */
static u8
zr36050_read_status1 (struct zr36050 *ptr)
{
ptr->status1 = zr36050_read(ptr, ZR050_STATUS_1);
zr36050_read(ptr, 0);
return ptr->status1;
}
/* scale factor is kept in datastructure */
static u16
zr36050_read_scalefactor (struct zr36050 *ptr)
{
ptr->scalefact = (zr36050_read(ptr, ZR050_SF_HI) << 8) |
(zr36050_read(ptr, ZR050_SF_LO) & 0xFF);
/* leave 0 selected for an eventually GO from master */
zr36050_read(ptr, 0);
return ptr->scalefact;
}
static u16
zr36050_read_scalefactor (struct zr36050 *ptr)
{
ptr->scalefact = (zr36050_read(ptr, ZR050_SF_HI) << 8) |
(zr36050_read(ptr, ZR050_SF_LO) & 0xFF);
/* */
zr36050_read(ptr, 0);
return ptr->scalefact;
}