/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2003 Russell King, All Rights Reserved.
*
* This driver supports the following PXA CPU/SSP ports:-
*
* PXA250 SSP
* PXA255 SSP, NSSP
* PXA26x SSP, NSSP, ASSP
* PXA27x SSP1, SSP2, SSP3
* PXA3xx SSP1, SSP2, SSP3, SSP4
*/
#ifndef __LINUX_PXA2XX_SSP_H
#define __LINUX_PXA2XX_SSP_H
#include <linux/bits.h>
#include <linux/compiler_types.h>
#include <linux/io.h>
#include <linux/kconfig.h>
#include <linux/list.h>
#include <linux/types.h>
struct clk;
struct device;
struct device_node;
/*
* SSP Serial Port Registers
* PXA250, PXA255, PXA26x and PXA27x SSP controllers are all slightly different.
* PXA255, PXA26x and PXA27x have extra ports, registers and bits.
*/
#define SSCR0 (0 x00) /* SSP Control Register 0 */
#define SSCR1 (0 x04) /* SSP Control Register 1 */
#define SSSR (0 x08) /* SSP Status Register */
#define SSITR (0 x0C) /* SSP Interrupt Test Register */
#define SSDR (0 x10) /* SSP Data Write/Data Read Register */
#define SSTO (0 x28) /* SSP Time Out Register */
#define SSPSP (0 x2C) /* SSP Programmable Serial Protocol */
#define SSTSA (0 x30) /* SSP Tx Timeslot Active */
#define SSRSA (0 x34) /* SSP Rx Timeslot Active */
#define SSTSS (0 x38) /* SSP Timeslot Status */
#define SSACD (0 x3C) /* SSP Audio Clock Divider */
#define SSACDD (0 x40) /* SSP Audio Clock Dither Divider */
/* Common PXA2xx bits first */
#define SSCR0_DSS GENMASK(3 , 0 ) /* Data Size Select (mask) */
#define SSCR0_DataSize(x) ((x) - 1 ) /* Data Size Select [4..16] */
#define SSCR0_FRF GENMASK(5 , 4 ) /* FRame Format (mask) */
#define SSCR0_Motorola (0 x0 << 4 ) /* Motorola's Serial Peripheral Interface (SPI) */
#define SSCR0_TI (0 x1 << 4 ) /* Texas Instruments' Synchronous Serial Protocol (SSP) */
#define SSCR0_National (0 x2 << 4 ) /* National Microwire */
#define SSCR0_ECS BIT(6 ) /* External clock select */
#define SSCR0_SSE BIT(7 ) /* Synchronous Serial Port Enable */
#define SSCR0_SCR(x) ((x) << 8 ) /* Serial Clock Rate (mask) */
/* PXA27x, PXA3xx */
#define SSCR0_EDSS BIT(20 ) /* Extended data size select */
#define SSCR0_NCS BIT(21 ) /* Network clock select */
#define SSCR0_RIM BIT(22 ) /* Receive FIFO overrun interrupt mask */
#define SSCR0_TUM BIT(23 ) /* Transmit FIFO underrun interrupt mask */
#define SSCR0_FRDC GENMASK(26 , 24 ) /* Frame rate divider control (mask) */
#define SSCR0_SlotsPerFrm(x) (((x) - 1 ) << 24 ) /* Time slots per frame [1..8] */
#define SSCR0_FPCKE BIT(29 ) /* FIFO packing enable */
#define SSCR0_ACS BIT(30 ) /* Audio clock select */
#define SSCR0_MOD BIT(31 ) /* Mode (normal or network) */
#define SSCR1_RIE BIT(0 ) /* Receive FIFO Interrupt Enable */
#define SSCR1_TIE BIT(1 ) /* Transmit FIFO Interrupt Enable */
#define SSCR1_LBM BIT(2 ) /* Loop-Back Mode */
#define SSCR1_SPO BIT(3 ) /* Motorola SPI SSPSCLK polarity setting */
#define SSCR1_SPH BIT(4 ) /* Motorola SPI SSPSCLK phase setting */
#define SSCR1_MWDS BIT(5 ) /* Microwire Transmit Data Size */
#define SSSR_ALT_FRM_MASK GENMASK(1 , 0 ) /* Masks the SFRM signal number */
#define SSSR_TNF BIT(2 ) /* Transmit FIFO Not Full */
#define SSSR_RNE BIT(3 ) /* Receive FIFO Not Empty */
#define SSSR_BSY BIT(4 ) /* SSP Busy */
#define SSSR_TFS BIT(5 ) /* Transmit FIFO Service Request */
#define SSSR_RFS BIT(6 ) /* Receive FIFO Service Request */
#define SSSR_ROR BIT(7 ) /* Receive FIFO Overrun */
#define RX_THRESH_DFLT 8
#define TX_THRESH_DFLT 8
#define SSSR_TFL_MASK GENMASK(11 , 8 ) /* Transmit FIFO Level mask */
#define SSSR_RFL_MASK GENMASK(15 , 12 ) /* Receive FIFO Level mask */
#define SSCR1_TFT GENMASK(9 , 6 ) /* Transmit FIFO Threshold (mask) */
#define SSCR1_TxTresh(x) (((x) - 1 ) << 6 ) /* level [1..16] */
#define SSCR1_RFT GENMASK(13 , 10 ) /* Receive FIFO Threshold (mask) */
#define SSCR1_RxTresh(x) (((x) - 1 ) << 10 ) /* level [1..16] */
#define RX_THRESH_CE4100_DFLT 2
#define TX_THRESH_CE4100_DFLT 2
#define CE4100_SSSR_TFL_MASK GENMASK(9 , 8 ) /* Transmit FIFO Level mask */
#define CE4100_SSSR_RFL_MASK GENMASK(13 , 12 ) /* Receive FIFO Level mask */
#define CE4100_SSCR1_TFT GENMASK(7 , 6 ) /* Transmit FIFO Threshold (mask) */
#define CE4100_SSCR1_TxTresh(x) (((x) - 1 ) << 6 ) /* level [1..4] */
#define CE4100_SSCR1_RFT GENMASK(11 , 10 ) /* Receive FIFO Threshold (mask) */
#define CE4100_SSCR1_RxTresh(x) (((x) - 1 ) << 10 ) /* level [1..4] */
/* Intel Quark X1000 */
#define DDS_RATE 0 x28 /* SSP DDS Clock Rate Register */
/* QUARK_X1000 SSCR0 bit definition */
#define QUARK_X1000_SSCR0_DSS GENMASK(4 , 0 ) /* Data Size Select (mask) */
#define QUARK_X1000_SSCR0_DataSize(x) ((x) - 1 ) /* Data Size Select [4..32] */
#define QUARK_X1000_SSCR0_FRF GENMASK(6 , 5 ) /* FRame Format (mask) */
#define QUARK_X1000_SSCR0_Motorola (0 x0 << 5 ) /* Motorola's Serial Peripheral Interface (SPI) */
#define RX_THRESH_QUARK_X1000_DFLT 1
#define TX_THRESH_QUARK_X1000_DFLT 16
#define QUARK_X1000_SSSR_TFL_MASK GENMASK(12 , 8 ) /* Transmit FIFO Level mask */
#define QUARK_X1000_SSSR_RFL_MASK GENMASK(17 , 13 ) /* Receive FIFO Level mask */
#define QUARK_X1000_SSCR1_TFT GENMASK(10 , 6 ) /* Transmit FIFO Threshold (mask) */
#define QUARK_X1000_SSCR1_TxTresh(x) (((x) - 1 ) << 6 ) /* level [1..32] */
#define QUARK_X1000_SSCR1_RFT GENMASK(15 , 11 ) /* Receive FIFO Threshold (mask) */
#define QUARK_X1000_SSCR1_RxTresh(x) (((x) - 1 ) << 11 ) /* level [1..32] */
#define QUARK_X1000_SSCR1_EFWR BIT(16 ) /* Enable FIFO Write/Read */
#define QUARK_X1000_SSCR1_STRF BIT(17 ) /* Select FIFO or EFWR */
/* Extra bits in PXA255, PXA26x and PXA27x SSP ports */
#define SSCR0_TISSP (1 << 4 ) /* TI Sync Serial Protocol */
#define SSCR0_PSP (3 << 4 ) /* PSP - Programmable Serial Protocol */
#define SSCR1_EFWR BIT(14 ) /* Enable FIFO Write/Read */
#define SSCR1_STRF BIT(15 ) /* Select FIFO or EFWR */
#define SSCR1_IFS BIT(16 ) /* Invert Frame Signal */
#define SSCR1_PINTE BIT(18 ) /* Peripheral Trailing Byte Interrupt Enable */
#define SSCR1_TINTE BIT(19 ) /* Receiver Time-out Interrupt enable */
#define SSCR1_RSRE BIT(20 ) /* Receive Service Request Enable */
#define SSCR1_TSRE BIT(21 ) /* Transmit Service Request Enable */
#define SSCR1_TRAIL BIT(22 ) /* Trailing Byte */
#define SSCR1_RWOT BIT(23 ) /* Receive Without Transmit */
#define SSCR1_SFRMDIR BIT(24 ) /* Frame Direction */
#define SSCR1_SCLKDIR BIT(25 ) /* Serial Bit Rate Clock Direction */
#define SSCR1_ECRB BIT(26 ) /* Enable Clock request B */
#define SSCR1_ECRA BIT(27 ) /* Enable Clock Request A */
#define SSCR1_SCFR BIT(28 ) /* Slave Clock free Running */
#define SSCR1_EBCEI BIT(29 ) /* Enable Bit Count Error interrupt */
#define SSCR1_TTE BIT(30 ) /* TXD Tristate Enable */
#define SSCR1_TTELP BIT(31 ) /* TXD Tristate Enable Last Phase */
#define SSSR_PINT BIT(18 ) /* Peripheral Trailing Byte Interrupt */
#define SSSR_TINT BIT(19 ) /* Receiver Time-out Interrupt */
#define SSSR_EOC BIT(20 ) /* End Of Chain */
#define SSSR_TUR BIT(21 ) /* Transmit FIFO Under Run */
#define SSSR_CSS BIT(22 ) /* Clock Synchronisation Status */
#define SSSR_BCE BIT(23 ) /* Bit Count Error */
#define SSPSP_SCMODE(x) ((x) << 0 ) /* Serial Bit Rate Clock Mode */
#define SSPSP_SFRMP BIT(2 ) /* Serial Frame Polarity */
#define SSPSP_ETDS BIT(3 ) /* End of Transfer data State */
#define SSPSP_STRTDLY(x) ((x) << 4 ) /* Start Delay */
#define SSPSP_DMYSTRT(x) ((x) << 7 ) /* Dummy Start */
#define SSPSP_SFRMDLY(x) ((x) << 9 ) /* Serial Frame Delay */
#define SSPSP_SFRMWDTH(x) ((x) << 16 ) /* Serial Frame Width */
#define SSPSP_DMYSTOP(x) ((x) << 23 ) /* Dummy Stop */
#define SSPSP_FSRT BIT(25 ) /* Frame Sync Relative Timing */
/* PXA3xx */
#define SSPSP_EDMYSTRT(x) ((x) << 26 ) /* Extended Dummy Start */
#define SSPSP_EDMYSTOP(x) ((x) << 28 ) /* Extended Dummy Stop */
#define SSPSP_TIMING_MASK (0 x7f8001f0)
#define SSACD_ACDS(x) ((x) << 0 ) /* Audio clock divider select */
#define SSACD_ACDS_1 (0 )
#define SSACD_ACDS_2 (1 )
#define SSACD_ACDS_4 (2 )
#define SSACD_ACDS_8 (3 )
#define SSACD_ACDS_16 (4 )
#define SSACD_ACDS_32 (5 )
#define SSACD_SCDB BIT(3 ) /* SSPSYSCLK Divider Bypass */
#define SSACD_SCDB_4X (0 )
#define SSACD_SCDB_1X (1 )
#define SSACD_ACPS(x) ((x) << 4 ) /* Audio clock PLL select */
#define SSACD_SCDX8 BIT(7 ) /* SYSCLK division ratio select */
/* Intel Merrifield SSP */
#define SFIFOL 0 x68 /* FIFO level */
#define SFIFOTT 0 x6c /* FIFO trigger threshold */
#define RX_THRESH_MRFLD_DFLT 16
#define TX_THRESH_MRFLD_DFLT 16
#define SFIFOL_TFL_MASK GENMASK(15 , 0 ) /* Transmit FIFO Level mask */
#define SFIFOL_RFL_MASK GENMASK(31 , 16 ) /* Receive FIFO Level mask */
#define SFIFOTT_TFT GENMASK(15 , 0 ) /* Transmit FIFO Threshold (mask) */
#define SFIFOTT_TxThresh(x) (((x) - 1 ) << 0 ) /* TX FIFO trigger threshold / level */
#define SFIFOTT_RFT GENMASK(31 , 16 ) /* Receive FIFO Threshold (mask) */
#define SFIFOTT_RxThresh(x) (((x) - 1 ) << 16 ) /* RX FIFO trigger threshold / level */
/* LPSS SSP */
#define SSITF 0 x44 /* TX FIFO trigger level */
#define SSITF_TxHiThresh(x) (((x) - 1 ) << 0 )
#define SSITF_TxLoThresh(x) (((x) - 1 ) << 8 )
#define SSIRF 0 x48 /* RX FIFO trigger level */
#define SSIRF_RxThresh(x) ((x) - 1 )
/* LPT/WPT SSP */
#define SSCR2 (0 x40) /* SSP Command / Status 2 */
#define SSPSP2 (0 x44) /* SSP Programmable Serial Protocol 2 */
enum pxa_ssp_type {
SSP_UNDEFINED = 0 ,
PXA25x_SSP, /* pxa 210, 250, 255, 26x */
PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
PXA27x_SSP,
PXA3xx_SSP,
PXA168_SSP,
PXA910_SSP,
CE4100_SSP,
MMP2_SSP,
MRFLD_SSP,
QUARK_X1000_SSP,
/* Keep LPSS types sorted with lpss_platforms[] */
LPSS_LPT_SSP,
LPSS_BYT_SSP,
LPSS_BSW_SSP,
LPSS_SPT_SSP,
LPSS_BXT_SSP,
LPSS_CNL_SSP,
SSP_MAX
};
struct ssp_device {
struct device *dev;
struct list_head node;
struct clk *clk;
void __iomem *mmio_base;
unsigned long phys_base;
const char *label;
int port_id;
enum pxa_ssp_type type;
int use_count;
int irq;
struct device_node *of_node;
};
/**
* pxa_ssp_write_reg - Write to a SSP register
*
* @dev: SSP device to access
* @reg: Register to write to
* @val: Value to be written.
*/
static inline void pxa_ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val)
{
__raw_writel(val, dev->mmio_base + reg);
}
/**
* pxa_ssp_read_reg - Read from a SSP register
*
* @dev: SSP device to access
* @reg: Register to read from
*/
static inline u32 pxa_ssp_read_reg(struct ssp_device *dev, u32 reg)
{
return __raw_readl(dev->mmio_base + reg);
}
static inline void pxa_ssp_enable(struct ssp_device *ssp)
{
u32 sscr0;
sscr0 = pxa_ssp_read_reg(ssp, SSCR0) | SSCR0_SSE;
pxa_ssp_write_reg(ssp, SSCR0, sscr0);
}
static inline void pxa_ssp_disable(struct ssp_device *ssp)
{
u32 sscr0;
sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & ~SSCR0_SSE;
pxa_ssp_write_reg(ssp, SSCR0, sscr0);
}
#if IS_ENABLED(CONFIG_PXA_SSP)
struct ssp_device *pxa_ssp_request(int port, const char *label);
void pxa_ssp_free(struct ssp_device *);
struct ssp_device *pxa_ssp_request_of(const struct device_node *of_node,
const char *label);
#else
static inline struct ssp_device *pxa_ssp_request(int port, const char *label)
{
return NULL;
}
static inline struct ssp_device *pxa_ssp_request_of(const struct device_node *n,
const char *name)
{
return NULL;
}
static inline void pxa_ssp_free(struct ssp_device *ssp) {}
#endif
#endif /* __LINUX_PXA2XX_SSP_H */
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