static int
xspi_release(struct inode *inode, struct file *filp)
{
struct xspi_instance *dev = filp->private_data;
func_enter();
if (down_interruptible(&dev->sem))
return -EINTR;
if (--dev->use_count == 0) {
/* This was the last closer: stop the device and free the IRQ */
if (wait_event_interruptible(dev->waitq,
XSpi_Stop(&dev->Spi) !=
XST_DEVICE_BUSY) != 0) {
/* Abort transfer by brute force */
XSpi_Abort(&dev->Spi);
}
disable_irq(dev->irq);
free_irq(dev->irq, &dev->Spi);
}
up(&dev->sem);
return 0;
}
/***************************************************************************//**
* @brief spi_init
*******************************************************************************/
int32_t spi_init(uint32_t device_id,
uint8_t clk_pha,
uint8_t clk_pol)
{
uint32_t base_addr = 0;
uint32_t spi_options = 0;
#ifdef _XPARAMETERS_PS_H_
spi_config = XSpiPs_LookupConfig(device_id);
base_addr = spi_config->BaseAddress;
XSpiPs_CfgInitialize(&spi_instance, spi_config, base_addr);
spi_options = XSPIPS_MASTER_OPTION |
(clk_pol ? XSPIPS_CLK_ACTIVE_LOW_OPTION : 0) |
(clk_pha ? XSPIPS_CLK_PHASE_1_OPTION : 0) |
(spi_decoded_cs ? XSPIPS_DECODE_SSELECT_OPTION : 0) |
XSPIPS_FORCE_SSELECT_OPTION;
XSpiPs_SetOptions(&spi_instance, spi_options);
XSpiPs_SetClkPrescaler(&spi_instance, XSPIPS_CLK_PRESCALE_32);
/* FIXME: Temporary 15.2 Fix */
XSpiPs_CfgInitialize(&spi_instance, spi_config, base_addr);
XSpiPs_SetOptions(&spi_instance, spi_options);
XSpiPs_SetClkPrescaler(&spi_instance, XSPIPS_CLK_PRESCALE_32);
#else
XSpi_Initialize(&spi_instance, device_id);
XSpi_Stop(&spi_instance);
spi_config = XSpi_LookupConfig(device_id);
base_addr = spi_config->BaseAddress;
XSpi_CfgInitialize(&spi_instance, spi_config, base_addr);
spi_options = XSP_MASTER_OPTION |
(clk_pol ? XSP_CLK_ACTIVE_LOW_OPTION : 0) |
(clk_pha ? XSP_CLK_PHASE_1_OPTION : 0) |
XSP_MANUAL_SSELECT_OPTION;
XSpi_SetOptions(&spi_instance, spi_options);
XSpi_Start(&spi_instance);
XSpi_IntrGlobalDisable(&spi_instance);
#endif
return 0;
}
void OLED_HostTerm(PmodOLED *InstancePtr)
{
///* Make the Data/Command select, Reset, and SPI CS pins be inputs.
//*/
OLED_SetGPIOBits(InstancePtr, DataCmd | Reset, true);
OLED_SetGPIOTristateBits(InstancePtr, DataCmd | Reset, true);
///* Make power control pins be inputs. The pullup resistors on the
//** board will ensure that the power supplies stay off.
//*/
OLED_SetGPIOBits(InstancePtr, VddCtrl | VbatCtrl, true);
OLED_SetGPIOTristateBits(InstancePtr, VddCtrl | VbatCtrl, true);
XSpi_Stop(&InstancePtr->OLEDSpi);
}
/***************************************************************************//**
* @brief spi_init
*******************************************************************************/
int32_t spi_init(uint32_t device_id,
uint8_t clk_pha,
uint8_t clk_pol)
{
uint32_t base_addr = 0;
uint32_t control_val = 0;
#ifdef _XPARAMETERS_PS_H_
uint8_t byte = 0;
spi_config = XSpiPs_LookupConfig(device_id);
base_addr = spi_config->BaseAddress;
XSpiPs_CfgInitialize(&spi_instance, spi_config, base_addr);
control_val = XSPIPS_CR_SSFORCE_MASK |
XSPIPS_CR_SSCTRL_MASK |
4 << XSPIPS_CR_PRESC_SHIFT |
(clk_pha ? XSPIPS_CR_CPHA_MASK : 0) |
(clk_pol ? XSPIPS_CR_CPOL_MASK : 0) |
XSPIPS_CR_MSTREN_MASK;
XSpiPs_WriteReg(base_addr, XSPIPS_CR_OFFSET, control_val);
for(byte = 0; byte < 128; byte++)
{
XSpiPs_ReadReg(base_addr, XSPIPS_RXD_OFFSET);
}
#else
XSpi_Initialize(&spi_instance, device_id);
XSpi_Stop(&spi_instance);
spi_config = XSpi_LookupConfig(device_id);
base_addr = spi_config->BaseAddress;
XSpi_CfgInitialize(&spi_instance, spi_config, base_addr);
control_val = XSP_MASTER_OPTION |
XSP_CLK_PHASE_1_OPTION |
XSP_MANUAL_SSELECT_OPTION;
XSpi_SetOptions(&spi_instance, control_val);
XSpi_Start(&spi_instance);
XSpi_IntrGlobalDisable(&spi_instance);
XSpi_SetSlaveSelect(&spi_instance, 1);
#endif
return SUCCESS;
}
/*** AD1_end(void)
**
** Parameters:
** InstancePtr - PmodAD1 object to stop
**
** Return Value:
** none
**
** Errors:
** none
**
** Description:
** Stops the device
*/
void AD1_end(PmodAD1* InstancePtr){
XSpi_Stop(&InstancePtr->AD1Spi);
}
/*** DA1_end(void)
**
** Parameters:
** InstancePtr - PmodDA1 object to stop
**
** Return Value:
** none
**
** Errors:
** none
**
** Description:
** Stops the device
*/
void DA1_end(PmodDA1* InstancePtr){
XSpi_Stop(&InstancePtr->DA1Spi);
}
/*** DPG1_end(void)
**
** Parameters:
** InstancePtr - PmodDPG1 object to stop
**
** Return Value:
** none
**
** Errors:
** none
**
** Description:
** Stops the device
*/
void DPG1_end(PmodDPG1* InstancePtr){
XSpi_Stop(&InstancePtr->DPG1Spi);
}
/*** NAV_end(void)
**
** Parameters:
** InstancePtr - PmodNAV object to stop
**
** Return Value:
** none
**
** Errors:
** none
**
** Description:
** Stops the device
*/
void NAV_end(PmodNAV* InstancePtr){
XSpi_Stop(&InstancePtr->NAVSpi);
}