static int __init str8100_inthandler_init(void)
{
int ret;
if(debug) printk("%s: \n",__FUNCTION__);
#if 0
/*
* Configure system Xtal clock to be output to CLKOUT pin
*/
HAL_PWRMGT_CONFIGURE_CLOCK_OUT_PIN(0, 0);
#endif
// HAL_MISC_ENABLE_ALL_SHARED_GPIO_PINS();
if(gpio){
if(debug) printk("%s: registering int handler for gpio int\n",__FUNCTION__);\
//gpio initialization depend on application
#if 0
HAL_MISC_DISABLE_EXT_INT29_PINS();
HAL_MISC_DISABLE_EXT_INT30_PINS();
HAL_PWRMGT_ENABLE_GPIO_CLOCK();
PWRMGT_SOFTWARE_RESET_CONTROL_REG |= (0x1 << PWRMGT_GPIO_SOFTWARE_RESET_BIT_INDEX);
PWRMGT_SOFTWARE_RESET_CONTROL_REG &= ~(0x1 << PWRMGT_GPIO_SOFTWARE_RESET_BIT_INDEX);
PWRMGT_SOFTWARE_RESET_CONTROL_REG |= (0x1 << PWRMGT_GPIO_SOFTWARE_RESET_BIT_INDEX);
HAL_GPIOA_SET_DIRECTION_INPUT(3);
HAL_GPIOA_ENABLE_INTERRUPT(3);
HAL_GPIOA_DISABLE_INTERRUPT_MASK(3);
HAL_GPIOA_SET_INTERRUPT_EDGE_TRIGGER_MODE(3);
#endif
str8100_set_interrupt_trigger (INTC_GPIO_EXTERNAL_INT_BIT_INDEX,INTC_LEVEL_TRIGGER,INTC_ACTIVE_HIGH);
if ((ret=request_irq(INTC_GPIO_EXTERNAL_INT_BIT_INDEX, str8100_gpio_irq_handler, 0, "testing", NULL))){
if(debug) printk("%s: request_irq failed(ret=0x%x)(-EBUSY=0x%x)\n",__FUNCTION__,ret,-EBUSY);
return -EBUSY;
}
}
#define register_ext_int(_i){\
if(debug) printk("%s: registering int handler for external int%d\n",__FUNCTION__,_i);\
HAL_MISC_ENABLE_EXT_INT##_i##_PINS();\
str8100_set_interrupt_trigger (INTC_EXT_INT##_i##_BIT_INDEX,INTC_LEVEL_TRIGGER,INTC_ACTIVE_LOW);\
if ((ret=request_irq(INTC_EXT_INT##_i##_BIT_INDEX, str8100_ext_irq_handler, 0, "testing", NULL))){\
if(debug) printk("%s: request_irq %d failed(ret=0x%x)(-EBUSY=0x%x)\n",__FUNCTION__,INTC_EXT_INT##_i##_BIT_INDEX,ret,-EBUSY);\
return -EBUSY;\
}\
}
if(ext29) register_ext_int(29);
if(ext30) register_ext_int(30);
/* HAL_MISC_ENABLE_EXT_INT30_PINS();
str8100_set_interrupt_trigger (INTC_EXT_INT30_BIT_INDEX,INTC_IRQ_INTERRUPT,INTC_LEVEL_TRIGGER,INTC_ACTIVE_LOW);
if ((ret=request_irq(INTC_EXT_INT30_BIT_INDEX, str8100_pm_irq_handler, 0, "testing", NULL))){
printk("%s: request_irq failed(ret=0x%x)(-EBUSY=0x%x)\n",__FUNCTION__,ret,-EBUSY);
return -EBUSY;
}
*/
return 0;
}
static int __init i2s_init_module(void)
{
u32 ret;
u32 ii;
printk("%s:\n",__FUNCTION__);
buffer = pci_alloc_consistent(NULL, BUFSIZE*2, &buffer_p);
if(!buffer){
printk("%s: alloc buffer failed.\n",__FUNCTION__);
goto exit1;
}
lbuffer=buffer;
lbuffer_p=buffer_p;
rbuffer=lbuffer+BUFSIZE;
rbuffer_p=lbuffer_p+BUFSIZE;
desc = pci_alloc_consistent(NULL, I2S_WM8772_DMAC_LLP_NUM*sizeof(DMAC_LLP_T)*4 , &desc_p);
if(!desc){
printk("%s: alloc buffer for desc failed.\n",__FUNCTION__);
goto exit1;
}
lb_txd=desc;
lb_txd_p=desc_p;
lb_rxd=desc+I2S_WM8772_DMAC_LLP_NUM;
lb_rxd_p=desc_p+I2S_WM8772_DMAC_LLP_NUM;
rb_txd=desc+I2S_WM8772_DMAC_LLP_NUM*2;
rb_txd_p=desc_p+I2S_WM8772_DMAC_LLP_NUM*2;
rb_rxd=desc+I2S_WM8772_DMAC_LLP_NUM*3;
rb_rxd_p=desc_p+I2S_WM8772_DMAC_LLP_NUM*3;
str8100_set_interrupt_trigger (INTC_I2S_BIT_INDEX,INTC_LEVEL_TRIGGER,INTC_ACTIVE_LOW);
if ((ret=request_irq(INTC_I2S_BIT_INDEX, str8100_i2s_irq_handler, 0, "i2s", NULL))){
printk("%s: request_irq %d failed(ret=0x%x)(-EBUSY=0x%x)\n",__FUNCTION__,INTC_I2S_BIT_INDEX,ret,-EBUSY);
goto exit1;
}
str8100_set_interrupt_trigger (INTC_GDMAC_TC_BIT_INDEX,INTC_LEVEL_TRIGGER,INTC_ACTIVE_HIGH);
if ((ret=request_irq(INTC_GDMAC_TC_BIT_INDEX, str8100_dma_tc_irq_handler, 0, "dma tc", NULL))){
printk("%s: request_irq %d failed(ret=0x%x)(-EBUSY=0x%x)\n",__FUNCTION__,INTC_GDMAC_TC_BIT_INDEX,ret,-EBUSY);
goto exit1;
}
str8100_set_interrupt_trigger (INTC_GDMAC_ERROR_BIT_INDEX,INTC_LEVEL_TRIGGER,INTC_ACTIVE_HIGH);
if ((ret=request_irq(INTC_GDMAC_ERROR_BIT_INDEX, str8100_dma_err_irq_handler, 0, "dma error", NULL))){
printk("%s: request_irq %d failed(ret=0x%x)(-EBUSY=0x%x)\n",__FUNCTION__,INTC_GDMAC_ERROR_BIT_INDEX,ret,-EBUSY);
goto exit1;
}
/*
* Initialize GPIO pins for COM1/COM2/COM3
*/
I2s_Gpio_SSP_Initialise();
str8100_i2s_init(sampling_rate,DATA_WIDTH, I2S_MODE, I2S_TIMING, I2S_SCLK_MODE);
/*
* Configure Wolfson's WM8772 ADC/DAC
*/
I2s_Configure_WM8772(I2S_TIMING, DATA_WIDTH, I2S_MODE);
#ifdef I2S_FULL_DUPLEX
/*
* To support I2S full duplex mode, GPIOA[3] will be used as I2S_DR pin.
* It means GPIOA[3] should be as input pin.
*/
MISC_GPIOA_PIN_ENABLE_REG &= ~(0x1 << 3);
GPIOA_DIRECTION_REG &= ~(0x1 << 3);
#endif
I2S_RIGHT_TRANSMIT_DATA_REG=0;
I2S_LEFT_TRANSMIT_DATA_REG=0;
ii=I2S_RIGHT_RECEIVE_DATA_REG;
ii=I2S_LEFT_RECEIVE_DATA_REG;
/*
* Initialize DMAC related configuration
*/
i2s_left_channel_llp_buf[0] = lbuffer_p;
i2s_right_channel_llp_buf[0] = rbuffer_p;
memset ((void *)&lbuffer[0], 0x0, I2S_WM8772_BUFFER_SIZE * 4);
memset ((void *)&rbuffer[0], 0x0, I2S_WM8772_BUFFER_SIZE * 4);
for (ii = 1; ii < I2S_WM8772_DMAC_LLP_NUM; ii++)
{
i2s_left_channel_llp_buf[ii] = i2s_left_channel_llp_buf[ii - 1] + (I2S_WM8772_BUFFER_SIZE * 4);
i2s_right_channel_llp_buf[ii] = i2s_right_channel_llp_buf[ii - 1] + (I2S_WM8772_BUFFER_SIZE * 4);
memset ((void *)&lbuffer[ii*I2S_WM8772_BUFFER_SIZE*4], 0x0, I2S_WM8772_BUFFER_SIZE * 4);
memset ((void *)&rbuffer[ii*I2S_WM8772_BUFFER_SIZE*4], 0x0, I2S_WM8772_BUFFER_SIZE * 4);
}
i2s_wm8772_dma_left_tx_channel = 0;
i2s_wm8772_dma_right_tx_channel = 1;
i2s_wm8772_dma_left_rx_channel = 2;
i2s_wm8772_dma_right_rx_channel = 3;
I2s_Configure_WM8772_DMA_Hardware_Handshake();
/*
* Enable I2S's interrupt sources
* Note for DMA hardware handshake, we only need to enable Left/Right Channel's
* Transmit Buffer Underrun.
*/
I2S_INTERRUPT_ENABLE_REG |= (I2S_RXBF_R_OR_FLAG | I2S_RXBF_L_OR_FLAG | I2S_TXBF_R_UR_FLAG | I2S_TXBF_L_UR_FLAG);
// Enable CPU interrupt
local_irq_enable();
/*
* Note DMA must be enabled first before I2S is enabled
*/
HAL_DMAC_ENABLE();
HAL_I2S_ENABLE_I2S();
printk("%s: exit successfully\n",__FUNCTION__);
return 0;
exit1:
HAL_I2S_DISABLE_I2S();
i2s_exit_module();
printk("%s: exit errornous\n",__FUNCTION__);
return -EBUSY;
}