/* show_msm_console - provide per-port serial console state. */
static ssize_t show_msm_console(struct device *dev,
struct device_attribute *attr, char *buf)
{
int enable;
struct uart_port *port;
struct platform_device *pdev = to_platform_device(dev);
port = get_port_from_line(pdev->id);
enable = get_console_state(port);
D("%s () :port->line %d, ir\n", __func__, port->line);
return snprintf(buf, sizeof(enable), "%d\n", enable);
}
/*
* set_msm_console - allow to enable/disable serial console on port.
*
* writing 1 enables serial console on UART port.
* writing 0 disables serial console on UART port.
*/
static ssize_t set_msm_console(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int enable, cur_state;
struct uart_port *port;
struct platform_device *pdev = to_platform_device(dev);
port = get_port_from_line(pdev->id);
cur_state = get_console_state(port);
enable = buf[0] - '0';
D("%s ():port->line %d,enable %d, cur_state %d ir\n", __func__, port->line, enable, cur_state);
if (enable == cur_state)
return count;
switch (enable) {
case 0:
D("%s(): Calling stop_console\n", __func__);
console_stop(port->cons);
D("%s(): Calling unregister_console\n", __func__);
unregister_console(port->cons);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
/*
* Disable UART Core clk
* 3 - to disable the UART clock
* Thid parameter is not used here, but used in serial core.
*/
msm_hsl_power_irda(port, 3, 1);
break;
case 1:
D("%s(): Calling register_console\n", __func__);
/*
* Disable UART Core clk
* 0 - to enable the UART clock
* Thid parameter is not used here, but used in serial core.
*/
msm_hsl_power_irda(port, 0, 1);
pm_runtime_enable(&pdev->dev);
register_console(port->cons);
break;
default:
return -EINVAL;
}
return count;
}
static ssize_t set_msm_console(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
int enable, cur_state;
struct uart_port *port;
struct platform_device *pdev = to_platform_device(dev);
port = get_port_from_line(pdev->id);
cur_state = get_console_state(port);
enable = buf[0] - '0';
pr_info("%s ():port->line %d,enable %d, cur_state %d ir\n", __func__, port->line, enable, cur_state);
if (enable == cur_state)
return count;
switch (enable) {
case 0:
pr_info("%s(): Calling stop_console\n", __func__);
console_stop(port->cons);
pr_debug("%s(): Calling unregister_console\n", __func__);
unregister_console(port->cons);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
msm_hsl_power_cir(port, 3, 1);
break;
case 1:
pr_info("%s(): Calling register_console\n", __func__);
msm_hsl_power_cir(port, 0, 1);
pm_runtime_enable(&pdev->dev);
register_console(port->cons);
break;
default:
return -EINVAL;
}
return count;
}
