int create_connection(struct unipro_connection *c) {
switch_cport_connect(NULL, c);
/**
* This part (poking local mailbox) is not part of the greybus spec.
* It is here so we can re-use the existing unipro code
*/
poke_mailbox(c->cport_id0 + 1, 0);
chip_unipro_init_cport(c->cport_id0);
wait_for_mailbox_ack(c->cport_id0 + 1, 0);
write_mailbox(c->cport_id1 + 1);
return 0;
}
result_t framebuffer_init(FramebufferInfo *fb_info)
{
fb_info = (FramebufferInfo*)FB_BASE_ADDR;
*fb_info = FramebufferInfo(); // initialize to the default values
u32 fb_address = FB_BASE_ADDR + GPU_FLUSH_CACHE;
// Tell the GPU where the framebuffer base address is
write_mailbox(fb_address, 1);
// Confirm we got it
if(read_mailbox(1) != 0)
return R_FAIL;
return R_OK;
}
static int ivtv_api_call(struct ivtv *itv, int cmd, int args, u32 data[])
{
struct ivtv_mailbox_data *mbdata = (cmd >= 128) ? &itv->enc_mbox : &itv->dec_mbox;
volatile struct ivtv_mailbox __iomem *mbox;
int api_timeout = msecs_to_jiffies(1000);
int flags, mb, i;
unsigned long then;
/* sanity checks */
if (NULL == mbdata) {
IVTV_ERR("No mailbox allocated\n");
return -ENODEV;
}
if (args < 0 || args > CX2341X_MBOX_MAX_DATA ||
cmd < 0 || cmd > 255 || api_info[cmd].name == NULL) {
IVTV_ERR("Invalid MB call: cmd = 0x%02x, args = %d\n", cmd, args);
return -EINVAL;
}
if (api_info[cmd].flags & API_HIGH_VOL) {
IVTV_DEBUG_HI_MB("MB Call: %s\n", api_info[cmd].name);
}
else {
IVTV_DEBUG_MB("MB Call: %s\n", api_info[cmd].name);
}
/* clear possibly uninitialized part of data array */
for (i = args; i < CX2341X_MBOX_MAX_DATA; i++)
data[i] = 0;
/* If this command was issued within the last 30 minutes and with identical
data, then just return 0 as there is no need to issue this command again.
Just an optimization to prevent unnecessary use of mailboxes. */
if (itv->api_cache[cmd].last_jiffies &&
time_before(jiffies,
itv->api_cache[cmd].last_jiffies +
msecs_to_jiffies(1800000)) &&
!memcmp(data, itv->api_cache[cmd].data, sizeof(itv->api_cache[cmd].data))) {
itv->api_cache[cmd].last_jiffies = jiffies;
return 0;
}
flags = api_info[cmd].flags;
if (flags & API_DMA) {
for (i = 0; i < 100; i++) {
mb = i % (mbdata->max_mbox + 1);
if (try_mailbox(itv, mbdata, mb)) {
write_mailbox(&mbdata->mbox[mb], cmd, args, data);
clear_bit(mb, &mbdata->busy);
return 0;
}
IVTV_DEBUG_WARN("%s: mailbox %d not free %08x\n",
api_info[cmd].name, mb, readl(&mbdata->mbox[mb].flags));
}
IVTV_WARN("Could not find free DMA mailbox for %s\n", api_info[cmd].name);
clear_all_mailboxes(itv, mbdata);
return -EBUSY;
}
if ((flags & API_FAST_RESULT) == API_FAST_RESULT)
api_timeout = msecs_to_jiffies(100);
mb = get_mailbox(itv, mbdata, flags);
if (mb < 0) {
IVTV_DEBUG_WARN("No free mailbox found (%s)\n", api_info[cmd].name);
clear_all_mailboxes(itv, mbdata);
return -EBUSY;
}
mbox = &mbdata->mbox[mb];
write_mailbox(mbox, cmd, args, data);
if (flags & API_CACHE) {
memcpy(itv->api_cache[cmd].data, data, sizeof(itv->api_cache[cmd].data));
itv->api_cache[cmd].last_jiffies = jiffies;
}
if ((flags & API_RESULT) == 0) {
clear_bit(mb, &mbdata->busy);
return 0;
}
/* Get results */
then = jiffies;
if (!(flags & API_NO_POLL)) {
/* First try to poll, then switch to delays */
for (i = 0; i < 100; i++) {
if (readl(&mbox->flags) & IVTV_MBOX_FIRMWARE_DONE)
break;
}
}
while (!(readl(&mbox->flags) & IVTV_MBOX_FIRMWARE_DONE)) {
if (time_after(jiffies, then + api_timeout)) {
IVTV_DEBUG_WARN("Could not get result (%s)\n", api_info[cmd].name);
/* reset the mailbox, but it is likely too late already */
write_sync(0, &mbox->flags);
clear_bit(mb, &mbdata->busy);
return -EIO;
}
if (flags & API_NO_WAIT_RES)
mdelay(1);
else
ivtv_msleep_timeout(1, 0);
}
if (time_after(jiffies, then + msecs_to_jiffies(100)))
IVTV_DEBUG_WARN("%s took %u jiffies\n",
api_info[cmd].name,
jiffies_to_msecs(jiffies - then));
for (i = 0; i < CX2341X_MBOX_MAX_DATA; i++)
data[i] = readl(&mbox->data[i]);
write_sync(0, &mbox->flags);
clear_bit(mb, &mbdata->busy);
return 0;
}
