local variable declaration and definition

函数

description: the host dma0 interrupt handler, when the interrupt generated, it will wake up the process,which is waiting for the host dma0 interrupt.

参数:

	int	irq:
	void	*dev_id:
	struct	pt_regs *regs:

返回:

NULL

参见:

Deprecated:

在文件opl_cpuif.c第134行定义。

参考 opl_host_dma0_irq_event及opl_host_dma0_waitq.

参考自 opl_host_dma_init().

description:the module's exit.

it is used for free resouces:irq,memory and unregister the device.

参数:

void

返回:

void

参见:

Deprecated:

在文件opl_cpuif.c第333行定义。

参考 dma0_rx_buf、OPL_HOST_MAJOR、OPL_HOST_NAME、OPL_HOSTDMA0_IRQ、order及u32.

description: the module's entry.

register the char device,request irq for host dma0 and malloc memory for dma0's buffer.

参数:

void

返回值:

	0	is success.
	!0	is fail

参见:

Deprecated:

在文件opl_cpuif.c第289行定义。

参考 dma0_rx_buf、dma0_tx_buf、host_dma0_isr()、opl_host_dma0_waitq、opl_host_fops、OPL_HOST_MAJOR、OPL_HOST_NAME、OPL_HOSTDMA0_IRQ、order、rx_phys_addr、tx_phys_addr及u32.

description: it is used for api to do something associated with ioctl command.

参数:

	struct	inode *inode:
	struct	file *filp:
	unsigned	int cmd: $:GET_IPMUX_DMA_RX_PHYS_ADDR:return the dma buffer physical address to user(set in dma's base address register) $:GET_IPMUX_DMA_TX_PHYS_ADDR:now,it is not used.all merge in rx buffer. $:GET_IPMUX_DMA_RX_BUF_DATA: receive the data to user,by dma_request_data_t struct. $:SET_IPMUX_DMA_TX_BUF_DATA: send the data to tx buffer, by dma_request_data_t struct. $:ENABLE_IPMUX_HOST_DMA0_INTERRUPT: enable the dma0 interrupt. $:DISABLE_IPMUX_HOST_DMA0_INTERRUPT: disable the dma0 interrupt. $:WAIT_FOR_IPMUX_HOST_DMA0_INTERRUPT: wait for dma0 interrupt generated.
	u32	arg: $for PHY_ADDR: it is dma_request_phys_addr_t $for BUF_DATA: it is dma_request_data_t $for INTERRUPT: NULL

返回值:

	0	is success
	!0	is fail

参见:

Deprecated:

在文件opl_cpuif.c第194行定义。

参考 dma_request_data_s::bd、dma_request_data_s::buf、DISABLE_IPMUX_HOST_DMA0_INTERRUPT、dma_request_data_t、dma_request_phys_addr_t、dma_request_data_s::dmas、dma_request_phys_addr_s::dmas、ENABLE_IPMUX_HOST_DMA0_INTERRUPT、GET_IPMUX_DMA_RX_BUF_DATA、GET_IPMUX_DMA_RX_PHYS_ADDR、GET_IPMUX_DMA_TX_PHYS_ADDR、ipmux_irq_disable()、ipmux_irq_enable()、dma_request_data_s::len、OPL_DMA_VAL_MAX、opl_host_dma0_irq_event、opl_host_dma0_waitq、opl_host_is_open、OPL_HOSTDMA0_IRQ、dma_request_phys_addr_s::phys_addr、rx_phys_addr、SET_IPMUX_DMA_TX_BUF_DATA、tx_phys_addr及WAIT_FOR_IPMUX_HOST_DMA0_INTERRUPT.