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dccf736965
Some of the Intel LPSS SPI properties will be different in upcoming platforms compared to existing Lynxpoint and BayTrail/Braswell. LPSS SPI private registers will be at different offset and there will be changes in individual registers and default FIFO thresholds too. Add configuration for these differences and use them in runtime based on LPSS SSP type. With this change private registers offset autodetection becomes needless. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
263 lines
9.7 KiB
C
263 lines
9.7 KiB
C
/*
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* pxa2xx_ssp.h
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*
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* Copyright (C) 2003 Russell King, All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This driver supports the following PXA CPU/SSP ports:-
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*
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* PXA250 SSP
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* PXA255 SSP, NSSP
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* PXA26x SSP, NSSP, ASSP
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* PXA27x SSP1, SSP2, SSP3
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* PXA3xx SSP1, SSP2, SSP3, SSP4
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*/
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#ifndef __LINUX_SSP_H
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#define __LINUX_SSP_H
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#include <linux/list.h>
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#include <linux/io.h>
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#include <linux/of.h>
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/*
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* SSP Serial Port Registers
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* PXA250, PXA255, PXA26x and PXA27x SSP controllers are all slightly different.
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* PXA255, PXA26x and PXA27x have extra ports, registers and bits.
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*/
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#define SSCR0 (0x00) /* SSP Control Register 0 */
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#define SSCR1 (0x04) /* SSP Control Register 1 */
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#define SSSR (0x08) /* SSP Status Register */
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#define SSITR (0x0C) /* SSP Interrupt Test Register */
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#define SSDR (0x10) /* SSP Data Write/Data Read Register */
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#define SSTO (0x28) /* SSP Time Out Register */
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#define DDS_RATE (0x28) /* SSP DDS Clock Rate Register (Intel Quark) */
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#define SSPSP (0x2C) /* SSP Programmable Serial Protocol */
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#define SSTSA (0x30) /* SSP Tx Timeslot Active */
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#define SSRSA (0x34) /* SSP Rx Timeslot Active */
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#define SSTSS (0x38) /* SSP Timeslot Status */
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#define SSACD (0x3C) /* SSP Audio Clock Divider */
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#define SSACDD (0x40) /* SSP Audio Clock Dither Divider */
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/* Common PXA2xx bits first */
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#define SSCR0_DSS (0x0000000f) /* Data Size Select (mask) */
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#define SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..16] */
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#define SSCR0_FRF (0x00000030) /* FRame Format (mask) */
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#define SSCR0_Motorola (0x0 << 4) /* Motorola's Serial Peripheral Interface (SPI) */
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#define SSCR0_TI (0x1 << 4) /* Texas Instruments' Synchronous Serial Protocol (SSP) */
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#define SSCR0_National (0x2 << 4) /* National Microwire */
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#define SSCR0_ECS (1 << 6) /* External clock select */
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#define SSCR0_SSE (1 << 7) /* Synchronous Serial Port Enable */
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#define SSCR0_SCR(x) ((x) << 8) /* Serial Clock Rate (mask) */
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/* PXA27x, PXA3xx */
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#define SSCR0_EDSS (1 << 20) /* Extended data size select */
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#define SSCR0_NCS (1 << 21) /* Network clock select */
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#define SSCR0_RIM (1 << 22) /* Receive FIFO overrrun interrupt mask */
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#define SSCR0_TUM (1 << 23) /* Transmit FIFO underrun interrupt mask */
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#define SSCR0_FRDC (0x07000000) /* Frame rate divider control (mask) */
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#define SSCR0_SlotsPerFrm(x) (((x) - 1) << 24) /* Time slots per frame [1..8] */
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#define SSCR0_FPCKE (1 << 29) /* FIFO packing enable */
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#define SSCR0_ACS (1 << 30) /* Audio clock select */
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#define SSCR0_MOD (1 << 31) /* Mode (normal or network) */
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#define SSCR1_RIE (1 << 0) /* Receive FIFO Interrupt Enable */
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#define SSCR1_TIE (1 << 1) /* Transmit FIFO Interrupt Enable */
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#define SSCR1_LBM (1 << 2) /* Loop-Back Mode */
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#define SSCR1_SPO (1 << 3) /* Motorola SPI SSPSCLK polarity setting */
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#define SSCR1_SPH (1 << 4) /* Motorola SPI SSPSCLK phase setting */
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#define SSCR1_MWDS (1 << 5) /* Microwire Transmit Data Size */
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#define SSSR_ALT_FRM_MASK 3 /* Masks the SFRM signal number */
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#define SSSR_TNF (1 << 2) /* Transmit FIFO Not Full */
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#define SSSR_RNE (1 << 3) /* Receive FIFO Not Empty */
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#define SSSR_BSY (1 << 4) /* SSP Busy */
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#define SSSR_TFS (1 << 5) /* Transmit FIFO Service Request */
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#define SSSR_RFS (1 << 6) /* Receive FIFO Service Request */
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#define SSSR_ROR (1 << 7) /* Receive FIFO Overrun */
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#ifdef CONFIG_ARCH_PXA
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#define RX_THRESH_DFLT 8
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#define TX_THRESH_DFLT 8
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#define SSSR_TFL_MASK (0xf << 8) /* Transmit FIFO Level mask */
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#define SSSR_RFL_MASK (0xf << 12) /* Receive FIFO Level mask */
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#define SSCR1_TFT (0x000003c0) /* Transmit FIFO Threshold (mask) */
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#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..16] */
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#define SSCR1_RFT (0x00003c00) /* Receive FIFO Threshold (mask) */
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#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..16] */
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#else
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#define RX_THRESH_DFLT 2
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#define TX_THRESH_DFLT 2
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#define SSSR_TFL_MASK (0x3 << 8) /* Transmit FIFO Level mask */
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#define SSSR_RFL_MASK (0x3 << 12) /* Receive FIFO Level mask */
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#define SSCR1_TFT (0x000000c0) /* Transmit FIFO Threshold (mask) */
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#define SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..4] */
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#define SSCR1_RFT (0x00000c00) /* Receive FIFO Threshold (mask) */
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#define SSCR1_RxTresh(x) (((x) - 1) << 10) /* level [1..4] */
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#endif
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/* QUARK_X1000 SSCR0 bit definition */
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#define QUARK_X1000_SSCR0_DSS (0x1F) /* Data Size Select (mask) */
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#define QUARK_X1000_SSCR0_DataSize(x) ((x) - 1) /* Data Size Select [4..32] */
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#define QUARK_X1000_SSCR0_FRF (0x3 << 5) /* FRame Format (mask) */
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#define QUARK_X1000_SSCR0_Motorola (0x0 << 5) /* Motorola's Serial Peripheral Interface (SPI) */
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#define RX_THRESH_QUARK_X1000_DFLT 1
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#define TX_THRESH_QUARK_X1000_DFLT 16
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#define QUARK_X1000_SSSR_TFL_MASK (0x1F << 8) /* Transmit FIFO Level mask */
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#define QUARK_X1000_SSSR_RFL_MASK (0x1F << 13) /* Receive FIFO Level mask */
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#define QUARK_X1000_SSCR1_TFT (0x1F << 6) /* Transmit FIFO Threshold (mask) */
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#define QUARK_X1000_SSCR1_TxTresh(x) (((x) - 1) << 6) /* level [1..32] */
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#define QUARK_X1000_SSCR1_RFT (0x1F << 11) /* Receive FIFO Threshold (mask) */
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#define QUARK_X1000_SSCR1_RxTresh(x) (((x) - 1) << 11) /* level [1..32] */
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#define QUARK_X1000_SSCR1_STRF (1 << 17) /* Select FIFO or EFWR */
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#define QUARK_X1000_SSCR1_EFWR (1 << 16) /* Enable FIFO Write/Read */
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/* extra bits in PXA255, PXA26x and PXA27x SSP ports */
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#define SSCR0_TISSP (1 << 4) /* TI Sync Serial Protocol */
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#define SSCR0_PSP (3 << 4) /* PSP - Programmable Serial Protocol */
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#define SSCR1_TTELP (1 << 31) /* TXD Tristate Enable Last Phase */
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#define SSCR1_TTE (1 << 30) /* TXD Tristate Enable */
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#define SSCR1_EBCEI (1 << 29) /* Enable Bit Count Error interrupt */
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#define SSCR1_SCFR (1 << 28) /* Slave Clock free Running */
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#define SSCR1_ECRA (1 << 27) /* Enable Clock Request A */
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#define SSCR1_ECRB (1 << 26) /* Enable Clock request B */
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#define SSCR1_SCLKDIR (1 << 25) /* Serial Bit Rate Clock Direction */
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#define SSCR1_SFRMDIR (1 << 24) /* Frame Direction */
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#define SSCR1_RWOT (1 << 23) /* Receive Without Transmit */
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#define SSCR1_TRAIL (1 << 22) /* Trailing Byte */
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#define SSCR1_TSRE (1 << 21) /* Transmit Service Request Enable */
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#define SSCR1_RSRE (1 << 20) /* Receive Service Request Enable */
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#define SSCR1_TINTE (1 << 19) /* Receiver Time-out Interrupt enable */
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#define SSCR1_PINTE (1 << 18) /* Peripheral Trailing Byte Interrupt Enable */
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#define SSCR1_IFS (1 << 16) /* Invert Frame Signal */
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#define SSCR1_STRF (1 << 15) /* Select FIFO or EFWR */
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#define SSCR1_EFWR (1 << 14) /* Enable FIFO Write/Read */
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#define SSSR_BCE (1 << 23) /* Bit Count Error */
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#define SSSR_CSS (1 << 22) /* Clock Synchronisation Status */
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#define SSSR_TUR (1 << 21) /* Transmit FIFO Under Run */
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#define SSSR_EOC (1 << 20) /* End Of Chain */
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#define SSSR_TINT (1 << 19) /* Receiver Time-out Interrupt */
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#define SSSR_PINT (1 << 18) /* Peripheral Trailing Byte Interrupt */
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#define SSPSP_SCMODE(x) ((x) << 0) /* Serial Bit Rate Clock Mode */
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#define SSPSP_SFRMP (1 << 2) /* Serial Frame Polarity */
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#define SSPSP_ETDS (1 << 3) /* End of Transfer data State */
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#define SSPSP_STRTDLY(x) ((x) << 4) /* Start Delay */
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#define SSPSP_DMYSTRT(x) ((x) << 7) /* Dummy Start */
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#define SSPSP_SFRMDLY(x) ((x) << 9) /* Serial Frame Delay */
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#define SSPSP_SFRMWDTH(x) ((x) << 16) /* Serial Frame Width */
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#define SSPSP_DMYSTOP(x) ((x) << 23) /* Dummy Stop */
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#define SSPSP_FSRT (1 << 25) /* Frame Sync Relative Timing */
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/* PXA3xx */
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#define SSPSP_EDMYSTRT(x) ((x) << 26) /* Extended Dummy Start */
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#define SSPSP_EDMYSTOP(x) ((x) << 28) /* Extended Dummy Stop */
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#define SSPSP_TIMING_MASK (0x7f8001f0)
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#define SSACD_SCDB (1 << 3) /* SSPSYSCLK Divider Bypass */
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#define SSACD_ACPS(x) ((x) << 4) /* Audio clock PLL select */
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#define SSACD_ACDS(x) ((x) << 0) /* Audio clock divider select */
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#define SSACD_SCDX8 (1 << 7) /* SYSCLK division ratio select */
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/* LPSS SSP */
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#define SSITF 0x44 /* TX FIFO trigger level */
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#define SSITF_TxLoThresh(x) (((x) - 1) << 8)
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#define SSITF_TxHiThresh(x) ((x) - 1)
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#define SSIRF 0x48 /* RX FIFO trigger level */
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#define SSIRF_RxThresh(x) ((x) - 1)
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enum pxa_ssp_type {
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SSP_UNDEFINED = 0,
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PXA25x_SSP, /* pxa 210, 250, 255, 26x */
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PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */
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PXA27x_SSP,
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PXA3xx_SSP,
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PXA168_SSP,
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PXA910_SSP,
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CE4100_SSP,
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QUARK_X1000_SSP,
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LPSS_LPT_SSP, /* Keep LPSS types sorted with lpss_platforms[] */
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LPSS_BYT_SSP,
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};
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struct ssp_device {
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struct platform_device *pdev;
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struct list_head node;
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struct clk *clk;
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void __iomem *mmio_base;
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unsigned long phys_base;
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const char *label;
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int port_id;
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int type;
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int use_count;
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int irq;
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int drcmr_rx;
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int drcmr_tx;
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struct device_node *of_node;
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};
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/**
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* pxa_ssp_write_reg - Write to a SSP register
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*
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* @dev: SSP device to access
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* @reg: Register to write to
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* @val: Value to be written.
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*/
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static inline void pxa_ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val)
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{
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__raw_writel(val, dev->mmio_base + reg);
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}
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/**
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* pxa_ssp_read_reg - Read from a SSP register
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*
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* @dev: SSP device to access
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* @reg: Register to read from
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*/
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static inline u32 pxa_ssp_read_reg(struct ssp_device *dev, u32 reg)
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{
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return __raw_readl(dev->mmio_base + reg);
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}
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#if IS_ENABLED(CONFIG_PXA_SSP)
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struct ssp_device *pxa_ssp_request(int port, const char *label);
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void pxa_ssp_free(struct ssp_device *);
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struct ssp_device *pxa_ssp_request_of(const struct device_node *of_node,
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const char *label);
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#else
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static inline struct ssp_device *pxa_ssp_request(int port, const char *label)
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{
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return NULL;
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}
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static inline struct ssp_device *pxa_ssp_request_of(const struct device_node *n,
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const char *name)
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{
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return NULL;
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}
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static inline void pxa_ssp_free(struct ssp_device *ssp) {}
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#endif
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#endif
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