root/include/linux/atmel-ssc.h

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#ifndef __INCLUDE_ATMEL_SSC_H
#define __INCLUDE_ATMEL_SSC_H

#include <linux/platform_device.h>
#include <linux/list.h>
#include <linux/io.h>

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;
};

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
#define SSC_TCMR_CKO_OFFSET                      2
#define SSC_TCMR_CKS_SIZE                        2
#define SSC_TCMR_CKS_OFFSET                      0
#define SSC_TCMR_PERIOD_SIZE                     8
#define SSC_TCMR_PERIOD_OFFSET                  24
#define SSC_TCMR_START_SIZE                      4
#define SSC_TCMR_START_OFFSET                    8
#define SSC_TCMR_STTDLY_SIZE                     8
#define SSC_TCMR_STTDLY_OFFSET                  16

/* SSC Transmit Frame Mode Register */
#define SSC_TFMR                        0x0000001c
#define SSC_TFMR_DATDEF_SIZE                     1
#define SSC_TFMR_DATDEF_OFFSET                   5
#define SSC_TFMR_DATLEN_SIZE                     5
#define SSC_TFMR_DATLEN_OFFSET                   0
#define SSC_TFMR_DATNB_SIZE                      4
#define SSC_TFMR_DATNB_OFFSET                    8
#define SSC_TFMR_FSDEN_SIZE                      1
#define SSC_TFMR_FSDEN_OFFSET                   23
#define SSC_TFMR_FSEDGE_SIZE                     1
#define SSC_TFMR_FSEDGE_OFFSET                  24
/*
 * The FSLEN_EXT exist on at91sam9rl, at91sam9g10,
 * at91sam9g20, and at91sam9g45 and newer SoCs
 */
#define SSC_TFMR_FSLEN_EXT_SIZE                  4
#define SSC_TFMR_FSLEN_EXT_OFFSET               28
#define SSC_TFMR_FSLEN_SIZE                      4
#define SSC_TFMR_FSLEN_OFFSET                   16
#define SSC_TFMR_FSOS_SIZE                       3
#define SSC_TFMR_FSOS_OFFSET                    20
#define SSC_TFMR_MSBF_SIZE                       1
#define SSC_TFMR_MSBF_OFFSET                     7

/* SSC Receive Hold Register */
#define SSC_RHR                         0x00000020
#define SSC_RHR_RDAT_SIZE                       32
#define SSC_RHR_RDAT_OFFSET                      0

/* SSC Transmit Hold Register */
#define SSC_THR                         0x00000024
#define SSC_THR_TDAT_SIZE                       32
#define SSC_THR_TDAT_OFFSET                      0

/* SSC Receive Sync. Holding Register */
#define SSC_RSHR                        0x00000030
#define SSC_RSHR_RSDAT_SIZE                     16
#define SSC_RSHR_RSDAT_OFFSET                    0

/* SSC Transmit Sync. Holding Register */
#define SSC_TSHR                        0x00000034
#define SSC_TSHR_TSDAT_SIZE                     16
#define SSC_TSHR_RSDAT_OFFSET                    0

/* SSC Receive Compare 0 Register */
#define SSC_RC0R                        0x00000038
#define SSC_RC0R_CP0_SIZE                       16
#define SSC_RC0R_CP0_OFFSET                      0

/* SSC Receive Compare 1 Register */
#define SSC_RC1R                        0x0000003c
#define SSC_RC1R_CP1_SIZE                       16
#define SSC_RC1R_CP1_OFFSET                      0

/* SSC Status Register */
#define SSC_SR                          0x00000040
#define SSC_SR_CP0_SIZE                          1
#define SSC_SR_CP0_OFFSET                        8
#define SSC_SR_CP1_SIZE                          1
#define SSC_SR_CP1_OFFSET                        9
#define SSC_SR_ENDRX_SIZE                        1
#define SSC_SR_ENDRX_OFFSET                      6
#define SSC_SR_ENDTX_SIZE                        1
#define SSC_SR_ENDTX_OFFSET                      2
#define SSC_SR_OVRUN_SIZE                        1
#define SSC_SR_OVRUN_OFFSET                      5
#define SSC_SR_RXBUFF_SIZE                       1
#define SSC_SR_RXBUFF_OFFSET                     7
#define SSC_SR_RXEN_SIZE                         1
#define SSC_SR_RXEN_OFFSET                      17
#define SSC_SR_RXRDY_SIZE                        1
#define SSC_SR_RXRDY_OFFSET                      4
#define SSC_SR_RXSYN_SIZE                        1
#define SSC_SR_RXSYN_OFFSET                     11
#define SSC_SR_TXBUFE_SIZE                       1
#define SSC_SR_TXBUFE_OFFSET                     3
#define SSC_SR_TXEMPTY_SIZE                      1
#define SSC_SR_TXEMPTY_OFFSET                    1
#define SSC_SR_TXEN_SIZE                         1
#define SSC_SR_TXEN_OFFSET                      16
#define SSC_SR_TXRDY_SIZE                        1
#define SSC_SR_TXRDY_OFFSET                      0
#define SSC_SR_TXSYN_SIZE                        1
#define SSC_SR_TXSYN_OFFSET                     10

/* SSC Interrupt Enable Register */
#define SSC_IER                         0x00000044
#define SSC_IER_CP0_SIZE                         1
#define SSC_IER_CP0_OFFSET                       8
#define SSC_IER_CP1_SIZE                         1
#define SSC_IER_CP1_OFFSET                       9
#define SSC_IER_ENDRX_SIZE                       1
#define SSC_IER_ENDRX_OFFSET                     6
#define SSC_IER_ENDTX_SIZE                       1
#define SSC_IER_ENDTX_OFFSET                     2
#define SSC_IER_OVRUN_SIZE                       1
#define SSC_IER_OVRUN_OFFSET                     5
#define SSC_IER_RXBUFF_SIZE                      1
#define SSC_IER_RXBUFF_OFFSET                    7
#define SSC_IER_RXRDY_SIZE                       1
#define SSC_IER_RXRDY_OFFSET                     4
#define SSC_IER_RXSYN_SIZE                       1
#define SSC_IER_RXSYN_OFFSET                    11
#define SSC_IER_TXBUFE_SIZE                      1
#define SSC_IER_TXBUFE_OFFSET                    3
#define SSC_IER_TXEMPTY_SIZE                     1
#define SSC_IER_TXEMPTY_OFFSET                   1
#define SSC_IER_TXRDY_SIZE                       1
#define SSC_IER_TXRDY_OFFSET                     0
#define SSC_IER_TXSYN_SIZE                       1
#define SSC_IER_TXSYN_OFFSET                    10

/* SSC Interrupt Disable Register */
#define SSC_IDR                         0x00000048
#define SSC_IDR_CP0_SIZE                         1
#define SSC_IDR_CP0_OFFSET                       8
#define SSC_IDR_CP1_SIZE                         1
#define SSC_IDR_CP1_OFFSET                       9
#define SSC_IDR_ENDRX_SIZE                       1
#define SSC_IDR_ENDRX_OFFSET                     6
#define SSC_IDR_ENDTX_SIZE                       1
#define SSC_IDR_ENDTX_OFFSET                     2
#define SSC_IDR_OVRUN_SIZE                       1
#define SSC_IDR_OVRUN_OFFSET                     5
#define SSC_IDR_RXBUFF_SIZE                      1
#define SSC_IDR_RXBUFF_OFFSET                    7
#define SSC_IDR_RXRDY_SIZE                       1
#define SSC_IDR_RXRDY_OFFSET                     4
#define SSC_IDR_RXSYN_SIZE                       1
#define SSC_IDR_RXSYN_OFFSET                    11
#define SSC_IDR_TXBUFE_SIZE                      1
#define SSC_IDR_TXBUFE_OFFSET                    3
#define SSC_IDR_TXEMPTY_SIZE                     1
#define SSC_IDR_TXEMPTY_OFFSET                   1
#define SSC_IDR_TXRDY_SIZE                       1
#define SSC_IDR_TXRDY_OFFSET                     0
#define SSC_IDR_TXSYN_SIZE                       1
#define SSC_IDR_TXSYN_OFFSET                    10

/* SSC Interrupt Mask Register */
#define SSC_IMR                         0x0000004c
#define SSC_IMR_CP0_SIZE                         1
#define SSC_IMR_CP0_OFFSET                       8
#define SSC_IMR_CP1_SIZE                         1
#define SSC_IMR_CP1_OFFSET                       9
#define SSC_IMR_ENDRX_SIZE                       1
#define SSC_IMR_ENDRX_OFFSET                     6
#define SSC_IMR_ENDTX_SIZE                       1
#define SSC_IMR_ENDTX_OFFSET                     2
#define SSC_IMR_OVRUN_SIZE                       1
#define SSC_IMR_OVRUN_OFFSET                     5
#define SSC_IMR_RXBUFF_SIZE                      1
#define SSC_IMR_RXBUFF_OFFSET                    7
#define SSC_IMR_RXRDY_SIZE                       1
#define SSC_IMR_RXRDY_OFFSET                     4
#define SSC_IMR_RXSYN_SIZE                       1
#define SSC_IMR_RXSYN_OFFSET                    11
#define SSC_IMR_TXBUFE_SIZE                      1
#define SSC_IMR_TXBUFE_OFFSET                    3
#define SSC_IMR_TXEMPTY_SIZE                     1
#define SSC_IMR_TXEMPTY_OFFSET                   1
#define SSC_IMR_TXRDY_SIZE                       1
#define SSC_IMR_TXRDY_OFFSET                     0
#define SSC_IMR_TXSYN_SIZE                       1
#define SSC_IMR_TXSYN_OFFSET                    10

/* SSC PDC Receive Pointer Register */
#define SSC_PDC_RPR                     0x00000100

/* SSC PDC Receive Counter Register */
#define SSC_PDC_RCR                     0x00000104

/* SSC PDC Transmit Pointer Register */
#define SSC_PDC_TPR                     0x00000108

/* SSC PDC Receive Next Pointer Register */
#define SSC_PDC_RNPR                    0x00000110

/* SSC PDC Receive Next Counter Register */
#define SSC_PDC_RNCR                    0x00000114

/* SSC PDC Transmit Counter Register */
#define SSC_PDC_TCR                     0x0000010c

/* SSC PDC Transmit Next Pointer Register */
#define SSC_PDC_TNPR                    0x00000118

/* SSC PDC Transmit Next Counter Register */
#define SSC_PDC_TNCR                    0x0000011c

/* SSC PDC Transfer Control Register */
#define SSC_PDC_PTCR                    0x00000120
#define SSC_PDC_PTCR_RXTDIS_SIZE                 1
#define SSC_PDC_PTCR_RXTDIS_OFFSET               1
#define SSC_PDC_PTCR_RXTEN_SIZE                  1
#define SSC_PDC_PTCR_RXTEN_OFFSET                0
#define SSC_PDC_PTCR_TXTDIS_SIZE                 1
#define SSC_PDC_PTCR_TXTDIS_OFFSET               9
#define SSC_PDC_PTCR_TXTEN_SIZE                  1
#define SSC_PDC_PTCR_TXTEN_OFFSET                8

/* SSC PDC Transfer Status Register */
#define SSC_PDC_PTSR                    0x00000124
#define SSC_PDC_PTSR_RXTEN_SIZE                  1
#define SSC_PDC_PTSR_RXTEN_OFFSET                0
#define SSC_PDC_PTSR_TXTEN_SIZE                  1
#define SSC_PDC_PTSR_TXTEN_OFFSET                8

/* Bit manipulation macros */
#define SSC_BIT(name)                                   \
        (1 << SSC_##name##_OFFSET)
#define SSC_BF(name, value)                             \
        (((value) & ((1 << SSC_##name##_SIZE) - 1))     \
         << SSC_##name##_OFFSET)
#define SSC_BFEXT(name, value)                          \
        (((value) >> SSC_##name##_OFFSET)               \
         & ((1 << SSC_##name##_SIZE) - 1))
#define SSC_BFINS(name, value, old)                     \
        (((old) & ~(((1 << SSC_##name##_SIZE) - 1)      \
        << SSC_##name##_OFFSET)) | SSC_BF(name, value))

/* Register access macros */
#define ssc_readl(base, reg)            __raw_readl(base + SSC_##reg)
#define ssc_writel(base, reg, value)    __raw_writel((value), base + SSC_##reg)

#endif /* __INCLUDE_ATMEL_SSC_H */

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