C++ (Cpp) acpi_ec_write_data Examples

Example #1

static void advance_transaction(struct acpi_ec *ec, u8 status)
{
	unsigned long flags;
	spin_lock_irqsave(&ec->curr_lock, flags);
	if (!ec->curr)
		goto unlock;
	if (ec->curr->wlen > ec->curr->wi) {
		if ((status & ACPI_EC_FLAG_IBF) == 0)
			acpi_ec_write_data(ec,
				ec->curr->wdata[ec->curr->wi++]);
		else
			goto err;
	} else if (ec->curr->rlen > ec->curr->ri) {
		if ((status & ACPI_EC_FLAG_OBF) == 1) {
			ec->curr->rdata[ec->curr->ri++] = acpi_ec_read_data(ec);
			if (ec->curr->rlen == ec->curr->ri)
				ec->curr->done = true;
		} else
			goto err;
	} else if (ec->curr->wlen == ec->curr->wi &&
		   (status & ACPI_EC_FLAG_IBF) == 0)
		ec->curr->done = true;
	goto unlock;
err:
	/* false interrupt, state didn't change */
	if (in_interrupt())
		++ec->curr->irq_count;
unlock:
	spin_unlock_irqrestore(&ec->curr_lock, flags);
}

Example #2

static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
					const u8 * wdata, unsigned wdata_len,
					u8 * rdata, unsigned rdata_len)
{
	int result = 0;
	unsigned count = atomic_read(&ec->event_count);
	acpi_ec_write_cmd(ec, command);

	for (; wdata_len > 0; --wdata_len) {
		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count);
		if (result) {
			printk(KERN_ERR PREFIX
			       "write_cmd timeout, command = %d\n", command);
			goto end;
		}
		count = atomic_read(&ec->event_count);
		acpi_ec_write_data(ec, *(wdata++));
	}

	if (!rdata_len) {
		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0, count);
		if (result) {
			printk(KERN_ERR PREFIX
			       "finish-write timeout, command = %d\n", command);
			goto end;
		}
	} else if (command == ACPI_EC_COMMAND_QUERY) {
		atomic_set(&ec->query_pending, 0);
	}

	for (; rdata_len > 0; --rdata_len) {
		result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1, count);
		if (result) {
			printk(KERN_ERR PREFIX "read timeout, command = %d\n",
			       command);
			goto end;
		}
		count = atomic_read(&ec->event_count);
		*(rdata++) = acpi_ec_read_data(ec);
	}
      end:
	return result;
}