/**
* intel_mid_i2s_open - reserve and start a SSP depending of it's usage
* @usage : select which ssp i2s you need by giving usage (BT,MODEM...)
* @ps_settings : hardware settings to configure the SSP module
*
* May sleep (driver_find_device) : no lock permitted when called.
*
* Output parameters
* handle : handle of the selected SSP, or NULL if not found
*/
struct intel_mid_i2s_hdl *intel_mid_i2s_open(enum intel_mid_i2s_ssp_usage usage,
const struct intel_mid_i2s_settings *ps_settings)
{
struct pci_dev *pdev;
struct intel_mid_i2s_hdl *drv_data = NULL;
struct device *found_device = NULL;
pr_debug("%s : open called,searching for device with usage=%x !\n",
DRIVER_NAME, usage);
found_device = driver_find_device(&(intel_mid_i2s_driver.driver),
NULL, &usage, check_device);
if (!found_device) {
pr_debug("%s : open can not found with usage=0x%02X\n",
DRIVER_NAME, (int)usage);
return NULL;
}
pdev = to_pci_dev(found_device);
drv_data = pci_get_drvdata(pdev);
drv_data->current_settings = *ps_settings;
if (!drv_data) {
dev_err(found_device, "no drv_data in open pdev=%p\n", pdev);
put_device(found_device);
return NULL;
}
mutex_lock(&drv_data->mutex);
dev_dbg(found_device, "Open found pdevice=0x%p\n", pdev);
/* pm_runtime */
pm_runtime_get_sync(&drv_data->pdev->dev);
/* dmac1 is already set during probe */
if (i2s_dma_start(drv_data) != 0) {
dev_err(found_device, "Can not start DMA\n");
goto open_error;
}
/* if we restart after stop without suspend, we start ssp faster */
set_ssp_i2s_hw(drv_data, ps_settings);
drv_data->mask_sr = ((SSSR_BCE_MASK << SSSR_BCE_SHIFT) |
(SSSR_EOC_MASK << SSSR_EOC_SHIFT) |
(SSSR_ROR_MASK << SSSR_ROR_SHIFT) |
(SSSR_TUR_MASK << SSSR_TUR_SHIFT) |
(SSSR_TINT_MASK << SSSR_TINT_SHIFT) |
(SSSR_PINT_MASK << SSSR_PINT_SHIFT));
if (test_bit(I2S_PORT_CLOSING, &drv_data->flags)) {
dev_err(&drv_data->pdev->dev, "Opening a closing I2S!");
goto open_error;
}
/* there is no need to "wake up" as we can not close an opening i2s */
clear_bit(I2S_PORT_WRITE_BUSY, &drv_data->flags);
clear_bit(I2S_PORT_READ_BUSY, &drv_data->flags);
mutex_unlock(&drv_data->mutex);
return drv_data;
open_error:
pm_runtime_put(&drv_data->pdev->dev);
put_device(found_device);
mutex_unlock(&drv_data->mutex);
return NULL;
}
/*
* apl_i2s_init - Initialize I2s.
* @bus: i2s config structure
*
* Initialize I2s.
*/
static int apl_i2s_init(AplI2s *bus)
{
if (enable_DSP_SSP(bus))
return -1;
i2s_disable(bus->regs);
set_ssp_i2s_hw(bus->regs,
bus->shim,
bus->settings,
bus->bits_per_sample);
return 0;
}
