include/linux/atmel-ssc.h

Source file repositories/reference/linux-study-clean/include/linux/atmel-ssc.h

File Facts

System
Linux kernel
Corpus path
include/linux/atmel-ssc.h
Extension
.h
Size
9971 bytes
Lines
336
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct atmel_ssc_platform_data {
	int			use_dma;
	int			has_fslen_ext;
};

struct ssc_device {
	struct list_head	list;
	dma_addr_t		phybase;
	void __iomem		*regs;
	struct platform_device	*pdev;
	struct atmel_ssc_platform_data *pdata;
	struct clk		*clk;
	int			user;
	int			irq;
	bool			clk_from_rk_pin;
	bool			sound_dai;
};

struct ssc_device * __must_check ssc_request(unsigned int ssc_num);
void ssc_free(struct ssc_device *ssc);

/* SSC register offsets */

/* SSC Control Register */
#define SSC_CR				0x00000000
#define SSC_CR_RXDIS_SIZE			 1
#define SSC_CR_RXDIS_OFFSET			 1
#define SSC_CR_RXEN_SIZE			 1
#define SSC_CR_RXEN_OFFSET			 0
#define SSC_CR_SWRST_SIZE			 1
#define SSC_CR_SWRST_OFFSET			15
#define SSC_CR_TXDIS_SIZE			 1
#define SSC_CR_TXDIS_OFFSET			 9
#define SSC_CR_TXEN_SIZE			 1
#define SSC_CR_TXEN_OFFSET			 8

/* SSC Clock Mode Register */
#define SSC_CMR				0x00000004
#define SSC_CMR_DIV_SIZE			12
#define SSC_CMR_DIV_OFFSET			 0

/* SSC Receive Clock Mode Register */
#define SSC_RCMR			0x00000010
#define SSC_RCMR_CKG_SIZE			 2
#define SSC_RCMR_CKG_OFFSET			 6
#define SSC_RCMR_CKI_SIZE			 1
#define SSC_RCMR_CKI_OFFSET			 5
#define SSC_RCMR_CKO_SIZE			 3
#define SSC_RCMR_CKO_OFFSET			 2
#define SSC_RCMR_CKS_SIZE			 2
#define SSC_RCMR_CKS_OFFSET			 0
#define SSC_RCMR_PERIOD_SIZE			 8
#define SSC_RCMR_PERIOD_OFFSET			24
#define SSC_RCMR_START_SIZE			 4
#define SSC_RCMR_START_OFFSET			 8
#define SSC_RCMR_STOP_SIZE			 1
#define SSC_RCMR_STOP_OFFSET			12
#define SSC_RCMR_STTDLY_SIZE			 8
#define SSC_RCMR_STTDLY_OFFSET			16

/* SSC Receive Frame Mode Register */
#define SSC_RFMR			0x00000014
#define SSC_RFMR_DATLEN_SIZE			 5
#define SSC_RFMR_DATLEN_OFFSET			 0
#define SSC_RFMR_DATNB_SIZE			 4
#define SSC_RFMR_DATNB_OFFSET			 8
#define SSC_RFMR_FSEDGE_SIZE			 1
#define SSC_RFMR_FSEDGE_OFFSET			24
/*
 * The FSLEN_EXT exist on at91sam9rl, at91sam9g10,
 * at91sam9g20, and at91sam9g45 and newer SoCs
 */
#define SSC_RFMR_FSLEN_EXT_SIZE			 4
#define SSC_RFMR_FSLEN_EXT_OFFSET		28
#define SSC_RFMR_FSLEN_SIZE			 4
#define SSC_RFMR_FSLEN_OFFSET			16
#define SSC_RFMR_FSOS_SIZE			 4
#define SSC_RFMR_FSOS_OFFSET			20
#define SSC_RFMR_LOOP_SIZE			 1
#define SSC_RFMR_LOOP_OFFSET			 5
#define SSC_RFMR_MSBF_SIZE			 1
#define SSC_RFMR_MSBF_OFFSET			 7

/* SSC Transmit Clock Mode Register */
#define SSC_TCMR			0x00000018
#define SSC_TCMR_CKG_SIZE			 2
#define SSC_TCMR_CKG_OFFSET			 6
#define SSC_TCMR_CKI_SIZE			 1
#define SSC_TCMR_CKI_OFFSET			 5
#define SSC_TCMR_CKO_SIZE			 3

Annotation

Implementation Notes