/**
* omap_hsi_is_io_wakeup_from_hsi - Indicates an IO wakeup from HSI CAWAKE
*
* @hsi_port - returns port number which triggered wakeup. Range [1, 2].
* Only valid if return value is 1 (HSI wakeup detected)
*
* Return value :* false if CAWAKE Padconf has not been found or no IOWAKEUP event
* occured for CAWAKE.
* * true if HSI wakeup detected on port *hsi_port
*/
bool omap_hsi_is_io_wakeup_from_hsi(int *hsi_port)
{
struct hsi_port_ctx *port_ctx;
u16 val;
int i;
for (i = 0; i < omap_hsi_platform_data.num_ports; i++) {
port_ctx = &omap_hsi_platform_data.ctx->pctx[i];
/* Check for IO pad wakeup */
val = omap_mux_read_signal(port_ctx->cawake_padconf_name);
if (val == -ENODEV)
continue;
/* Continue only if CAWAKE is muxed */
if ((val & OMAP_MUX_MODE_MASK) !=
port_ctx->cawake_padconf_hsi_mode)
continue;
if (val & OMAP44XX_PADCONF_WAKEUPEVENT0) {
*hsi_port = port_ctx->port_number;
return true;
}
}
*hsi_port = 0;
return false;
}
/**
* omap_hsi_is_io_pad_hsi - Indicates if IO Pad has been muxed for HSI CAWAKE
*
* Return value :* 0 if CAWAKE Padconf has not been found or CAWAKE not muxed for
* CAWAKE
* * else 1
*/
static int omap_hsi_is_io_pad_hsi(void)
{
u16 val;
/* Check for IO pad */
val = omap_mux_read_signal(OMAP_HSI_PADCONF_CAWAKE_PIN);
if (val == -ENODEV)
return 0;
/* Continue only if CAWAKE is muxed */
if ((val & OMAP_MUX_MODE_MASK) != OMAP_HSI_PADCONF_CAWAKE_MODE)
return 0;
return 1;
}
/**
* omap_hsi_is_io_wakeup_from_hsi - Indicates an IO wakeup from HSI CAWAKE
*
* Return value :* 0 if CAWAKE Padconf has not been found or no IOWAKEUP event
* occured for CAWAKE
* * else 1
*/
int omap_hsi_is_io_wakeup_from_hsi(void)
{
u16 val;
/* Check for IO pad wakeup */
val = omap_mux_read_signal(OMAP_HSI_PADCONF_CAWAKE_PIN);
if (val == -ENODEV)
return 0;
/* Continue only if CAWAKE is muxed */
if ((val & OMAP_MUX_MODE_MASK) != OMAP_HSI_PADCONF_CAWAKE_MODE)
return 0;
if (val & OMAP44XX_PADCONF_WAKEUPEVENT0)
return 1;
return 0;
}
/**
* omap_hsi_is_io_pad_hsi - Indicates if IO Pad has been muxed for HSI CAWAKE
*
* @hsi_port - port number to check for HSI muxing. Range [1, 2]
*
* Return value :* 0 if CAWAKE Padconf has not been found or CAWAKE not muxed for
* CAWAKE
* * else 1
*/
static int omap_hsi_is_io_pad_hsi(int hsi_port)
{
struct hsi_port_ctx *port_ctx;
u16 val;
port_ctx = hsi_get_hsi_port_ctx_data(hsi_port);
if (!port_ctx)
return 0;
/* Check for IO pad */
val = omap_mux_read_signal(port_ctx->cawake_padconf_name);
if (val == -ENODEV)
return 0;
/* Continue only if CAWAKE is muxed */
if ((val & OMAP_MUX_MODE_MASK) != port_ctx->cawake_padconf_hsi_mode)
return 0;
return 1;
}
/**
* omap_hsi_resume_idle - Prepare HSI for wakeup from low power
*
* Return value :* -ENODEV if HSI platform device or HSI controller or CAWAKE
* Padconf has not been found
* * -EPERM if HSI is not allowed to wakeup the platform.
* * else 0.
*
*/
int omap_hsi_resume_idle(void)
{
struct platform_device *pdev;
struct hsi_dev *hsi_ctrl;
u16 val;
pdev = hsi_get_hsi_platform_device();
if (!pdev)
return -ENODEV;
if (!device_may_wakeup(&pdev->dev))
return -EPERM;
hsi_ctrl = hsi_get_hsi_controller_data(pdev);
if (!hsi_ctrl)
return -ENODEV;
/* Check for IO pad wakeup */
val = omap_mux_read_signal(OMAP_HSI_PADCONF_CAWAKE_PIN);
if (val == -ENODEV)
return val;
if (val & OMAP44XX_PADCONF_WAKEUPEVENT0) {
dev_dbg(hsi_ctrl->dev, "HSI WAKEUP DETECTED from PADCONF : "
"0x%04x\n", val);
/* CAWAKE falling or rising edge detected */
hsi_ctrl->hsi_port->cawake_off_event = true;
tasklet_hi_schedule(&hsi_ctrl->hsi_port->hsi_tasklet);
/* Disable interrupt until Bottom Half has cleared */
/* the IRQ status register */
disable_irq_nosync(hsi_ctrl->hsi_port->irq);
}
return 0;
}
/**
* omap_hsi_prepare_suspend - Prepare HSI for suspend mode (OFF)
*
* Return value : -ENODEV if HSI controller has not been found, else 0.
*
*/
int omap_hsi_prepare_suspend(void)
{
struct platform_device *pdev;
struct hsi_dev *hsi_ctrl;
u16 val;
pdev = hsi_get_hsi_platform_device();
hsi_ctrl = hsi_get_hsi_controller_data(pdev);
if (!hsi_ctrl)
return -ENODEV;
/* If HSI is enabled, CAWAKE IO wakeup has been disabled and */
/* we don't want to re-enable it here. HSI interrupt shall be */
/* generated normally because HSI HW is ON. */
if (hsi_ctrl->clock_enabled) {
dev_info(hsi_ctrl->dev, "Platform Suspend while HSI active\n");
return 0;
}
/* Check for IO pad wakeup */
val = omap_mux_read_signal(OMAP_HSI_PADCONF_CAWAKE_PIN);
if (val == -ENODEV)
return -ENODEV;
/* HSI can only wakeup OMAP if CAWAKE is muxed */
if ((val & OMAP_MUX_MODE_MASK) != OMAP_HSI_PADCONF_CAWAKE_MODE)
return 0;
if (device_may_wakeup(&pdev->dev))
omap_hsi_wakeup_enable(hsi_ctrl, 0);
else
omap_hsi_wakeup_disable(hsi_ctrl, 0);
return 0;
}
/**
* omap_hsi_is_io_wakeup_from_hsi - Indicates an IO wakeup from HSI CAWAKE
*
* Return value :* 0 if CAWAKE Padconf has not been found or no IOWAKEUP event
* occured for CAWAKE
* * else 1
*/
int omap_hsi_is_io_wakeup_from_hsi(void)
{
u16 val = 0;
/* Check for IO pad wakeup */
#ifdef CONFIG_OMAP_MUX
val = omap_mux_read_signal(OMAP_HSI_PADCONF_CAWAKE_PIN);
#else
if (cpu_is_omap44xx())
val = omap_readw(OMAP443X_CTRL_BASE +
OMAP4_CTRL_MODULE_PAD_USBB1_ULPITLL_CLK_OFFSET);
#endif
if (val == -ENODEV)
return 0;
/* Continue only if CAWAKE is muxed */
if ((val & OMAP_MUX_MODE_MASK) != OMAP_HSI_PADCONF_CAWAKE_MODE)
return 0;
if (val & OMAP44XX_PADCONF_WAKEUPEVENT0)
return 1;
return 0;
}
