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fafc245401
andes_spi is an spi interface developed by Andes Tech. Signed-off-by: Macpaul Lin <macpaul@andestech.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Mike Frysinger <vapier@gentoo.org> Acked-by: Mike Frysinger <vapier@gentoo.org>
128 lines
5.5 KiB
C
128 lines
5.5 KiB
C
/*
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* Register definitions for the Andes SPI Controller
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*
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* (C) Copyright 2011 Andes Technology
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* Macpaul Lin <macpaul@andestech.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef __ANDES_SPI_H
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#define __ANDES_SPI_H
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struct andes_spi_regs {
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unsigned int apb; /* 0x00 - APB SPI interface setting */
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unsigned int pio; /* 0x04 - PIO reg */
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unsigned int cr; /* 0x08 - SPI Control reg */
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unsigned int st; /* 0x0c - SPI Status reg */
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unsigned int ie; /* 0x10 - Interrupt Enable reg */
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unsigned int ist; /* 0x14 - Interrupt Status reg */
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unsigned int dcr; /* 0x18 - data control reg */
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unsigned int data; /* 0x1c - data register */
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unsigned int ahb; /* 0x20 - AHB SPI interface setting */
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unsigned int ver; /* 0x3c - SPI version reg */
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};
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#define BIT(x) (1 << (x))
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/* 0x00 - APB SPI interface setting register */
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#define ANDES_SPI_APB_BAUD(x) (((x) & 0xff) < 0)
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#define ANDES_SPI_APB_CSHT(x) (((x) & 0xf) < 16)
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#define ANDES_SPI_APB_SPNTS BIT(20) /* 0: normal, 1: delay */
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#define ANDES_SPI_APB_CPHA BIT(24) /* 0: Sampling at odd edges */
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#define ANDES_SPI_APB_CPOL BIT(25) /* 0: SCK low, 1: SCK high */
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#define ANDES_SPI_APB_MSSL BIT(26) /* 0: SPI Master, 1: slave */
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/* 0x04 - PIO register */
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#define ANDES_SPI_PIO_MISO BIT(0) /* input value of pin MISO */
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#define ANDES_SPI_PIO_MOSI BIT(1) /* I/O value of pin MOSI */
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#define ANDES_SPI_PIO_SCK BIT(2) /* I/O value of pin SCK */
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#define ANDES_SPI_PIO_CS BIT(3) /* I/O value of pin CS */
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#define ANDES_SPI_PIO_PIOE BIT(4) /* Programming IO Enable */
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/* 0x08 - SPI Control register */
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#define ANDES_SPI_CR_SPIRST BIT(0) /* SPI mode reset */
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#define ANDES_SPI_CR_RXFRST BIT(1) /* RxFIFO reset */
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#define ANDES_SPI_CR_TXFRST BIT(2) /* TxFIFO reset */
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#define ANDES_SPI_CR_RXFTH(x) (((x) & 0x1f) << 10) /* RxFIFO Threshold */
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#define ANDES_SPI_CR_TXFTH(x) (((x) & 0x1f) << 18) /* TxFIFO Threshold */
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/* 0x0c - SPI Status register */
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#define ANDES_SPI_ST_SPIBSY BIT(0) /* SPI Transfer is active */
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#define ANDES_SPI_ST_RXFEM BIT(8) /* RxFIFO Empty Flag */
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#define ANDES_SPI_ST_RXFEL BIT(9) /* RxFIFO Full Flag */
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#define ANDES_SPI_ST_RXFVE(x) (((x) >> 10) & 0x1f)
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#define ANDES_SPI_ST_TXFEM BIT(16) /* TxFIFO Empty Flag */
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#define ANDES_SPI_ST_TXFEL BIT(7) /* TxFIFO Full Flag */
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#define ANDES_SPI_ST_TXFVE(x) (((x) >> 18) & 0x1f)
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/* 0x10 - Interrupt Enable register */
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#define ANDES_SPI_IE_RXFORIE BIT(0) /* RxFIFO overrun intr */
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#define ANDES_SPI_IE_TXFURIE BIT(1) /* TxFOFO underrun intr */
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#define ANDES_SPI_IE_RXFTHIE BIT(2) /* RxFIFO threshold intr */
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#define ANDES_SPI_IE_TXFTHIE BIT(3) /* TxFIFO threshold intr */
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#define ANDES_SPI_IE_SPIEIE BIT(4) /* SPI transmit END intr */
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#define ANDES_SPI_IE_SPCFIE BIT(5) /* AHB/APB TxReq conflict */
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/* 0x14 - Interrupt Status Register */
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#define ANDES_SPI_IST_RXFORI BIT(0) /* has RxFIFO overrun */
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#define ANDES_SPI_IST_TXFURI BIT(1) /* has TxFOFO underrun */
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#define ANDES_SPI_IST_RXFTHI BIT(2) /* has RxFIFO threshold */
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#define ANDES_SPI_IST_TXFTHI BIT(3) /* has TxFIFO threshold */
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#define ANDES_SPI_IST_SPIEI BIT(4) /* has SPI transmit END */
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#define ANDES_SPI_IST_SPCFI BIT(5) /* has AHB/APB TxReq conflict */
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/* 0x18 - Data Control Register */
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#define ANDES_SPI_DCR_RCNT(x) (((x) & 0x3ff) << 0)
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#define ANDES_SPI_DCR_DYCNT(x) (((x) & 0x7) << 12)
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#define ANDES_SPI_DCR_WCNT(x) (((x) & 0x3ff) << 16)
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#define ANDES_SPI_DCR_TRAMODE(x) (((x) & 0x7) << 28)
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#define ANDES_SPI_DCR_SPIT BIT(31) /* SPI bus trigger */
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#define ANDES_SPI_DCR_MODE_WRCON ANDES_SPI_DCR_TRAMODE(0) /* w/r at the same time */
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#define ANDES_SPI_DCR_MODE_WO ANDES_SPI_DCR_TRAMODE(1) /* write only */
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#define ANDES_SPI_DCR_MODE_RO ANDES_SPI_DCR_TRAMODE(2) /* read only */
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#define ANDES_SPI_DCR_MODE_WR ANDES_SPI_DCR_TRAMODE(3) /* write, read */
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#define ANDES_SPI_DCR_MODE_RW ANDES_SPI_DCR_TRAMODE(4) /* read, write */
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#define ANDES_SPI_DCR_MODE_WDR ANDES_SPI_DCR_TRAMODE(5) /* write, dummy, read */
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#define ANDES_SPI_DCR_MODE_RDW ANDES_SPI_DCR_TRAMODE(6) /* read, dummy, write */
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#define ANDES_SPI_DCR_MODE_RECEIVE ANDES_SPI_DCR_TRAMODE(7) /* receive */
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/* 0x20 - AHB SPI interface setting register */
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#define ANDES_SPI_AHB_BAUD(x) (((x) & 0xff) < 0)
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#define ANDES_SPI_AHB_CSHT(x) (((x) & 0xf) < 16)
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#define ANDES_SPI_AHB_SPNTS BIT(20) /* 0: normal, 1: delay */
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#define ANDES_SPI_AHB_CPHA BIT(24) /* 0: Sampling at odd edges */
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#define ANDES_SPI_AHB_CPOL BIT(25) /* 0: SCK low, 1: SCK high */
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#define ANDES_SPI_AHB_MSSL BIT(26) /* only Master mode */
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/* 0x3c - Version Register - (Year V.MAJOR.MINOR) */
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#define ANDES_SPI_VER_MINOR(x) (((x) >> 0) & 0xf)
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#define ANDES_SPI_VER_MAJOR(x) (((x) >> 8) & 0xf)
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#define ANDES_SPI_VER_YEAR(x) (((x) >> 16) & 0xf)
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struct andes_spi_slave {
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struct spi_slave slave;
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struct andes_spi_regs *regs;
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unsigned int freq;
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};
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static inline struct andes_spi_slave *to_andes_spi(struct spi_slave *slave)
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{
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return container_of(slave, struct andes_spi_slave, slave);
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}
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#endif /* __ANDES_SPI_H */
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