7fa93ae37c
This driver works in PIO mode for now, interrupts are available only when FIFO is enabled. The FIFO cannot be used with arbitrary sizes which defeat its general use. At some point we can add DMA transfers where the FIFO can be more useful. Tested on uBMC (microBMC) and BBB. Sponsored by: Rubicon Communications (Netgate)
98 lines
3.8 KiB
C
98 lines
3.8 KiB
C
/*-
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* Copyright (c) 2016 Rubicon Communications, LLC (Netgate)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _TI_SPIREG_H_
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#define _TI_SPIREG_H_
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#define TI_SPI_GCLK 48000000U
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#define TI_SPI_FIFOSZ 32
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#define MCSPI_REVISION 0x0
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#define MCSPI_REVISION_SCHEME_SHIFT 30
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#define MCSPI_REVISION_SCHEME_MSK 0x3
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#define MCSPI_REVISION_FUNC_SHIFT 16
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#define MCSPI_REVISION_FUNC_MSK 0xfff
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#define MCSPI_REVISION_RTL_SHIFT 11
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#define MCSPI_REVISION_RTL_MSK 0x1f
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#define MCSPI_REVISION_MAJOR_SHIFT 8
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#define MCSPI_REVISION_MAJOR_MSK 0x7
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#define MCSPI_REVISION_CUSTOM_SHIFT 6
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#define MCSPI_REVISION_CUSTOM_MSK 0x3
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#define MCSPI_REVISION_MINOR_SHIFT 0
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#define MCSPI_REVISION_MINOR_MSK 0x3f
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#define MCSPI_SYSCONFIG 0x110
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#define MCSPI_SYSCONFIG_SOFTRESET (1 << 1)
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#define MCSPI_SYSSTATUS 0x114
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#define MCSPI_SYSSTATUS_RESETDONE (1 << 0)
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#define MCSPI_MODULCTRL 0x128
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#define MCSPI_MODULCTRL_SLAVE (1 << 2)
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#define MCSPI_MODULCTRL_SINGLE (1 << 0)
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#define MCSPI_IRQSTATUS 0x118
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#define MCSPI_IRQENABLE 0x11c
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#define MCSPI_IRQ_EOW (1 << 17)
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#define MCSPI_IRQ_RX0_OVERFLOW (1 << 3)
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#define MCSPI_IRQ_RX0_FULL (1 << 2)
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#define MCSPI_IRQ_TX0_UNDERFLOW (1 << 1)
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#define MCSPI_IRQ_TX0_EMPTY (1 << 0)
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#define MCSPI_CONF_CH(_c) (0x12c + 0x14 * (_c))
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#define MCSPI_CONF_CLKG (1 << 29)
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#define MCSPI_CONF_FFER (1 << 28)
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#define MCSPI_CONF_FFEW (1 << 27)
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#define MCSPI_CONF_SBPOL (1 << 24)
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#define MCSPI_CONF_SBE (1 << 23)
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#define MCSPI_CONF_FORCE (1 << 20)
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#define MCSPI_CONF_TURBO (1 << 19)
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#define MCSPI_CONF_IS (1 << 18)
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#define MCSPI_CONF_DPE1 (1 << 17)
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#define MCSPI_CONF_DPE0 (1 << 16)
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#define MCSPI_CONF_DMAR (1 << 15)
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#define MCSPI_CONF_DMAW (1 << 14)
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#define MCSPI_CONF_WL_MSK 0x1f
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#define MCSPI_CONF_WL_SHIFT 7
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#define MCSPI_CONF_WL8BITS (7 << MCSPI_CONF_WL_SHIFT)
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#define MCSPI_CONF_EPOL (1 << 6)
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#define MCSPI_CONF_CLK_MSK 0xf
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#define MCSPI_CONF_CLK_SHIFT 2
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#define MCSPI_CONF_POL (1 << 1)
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#define MCSPI_CONF_PHA (1 << 0)
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#define MCSPI_STAT_CH(_c) (0x130 + 0x14 * (_c))
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#define MCSPI_STAT_TXFFF (1 << 4)
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#define MCSPI_STAT_TXS (1 << 1)
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#define MCSPI_STAT_RXS (1 << 0)
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#define MCSPI_CTRL_CH(_c) (0x134 + 0x14 * (_c))
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#define MCSPI_EXTCLK_MSK 0xfff
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#define MCSPI_CTRL_EXTCLK_MSK 0xff
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#define MCSPI_CTRL_EXTCLK_SHIFT 8
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#define MCSPI_CTRL_ENABLE (1 << 0)
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#define MCSPI_TX_CH(_c) (0x138 + 0x14 * (_c))
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#define MCSPI_RX_CH(_c) (0x13c + 0x14 * (_c))
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#define MCSPI_XFERLEVEL 0x17c
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#define MCSPI_XFERLEVEL_AFL(_a) (((_a) >> 8) & 0xff)
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#define MCSPI_XFERLEVEL_AEL(_a) (((_a) >> 0) & 0xff)
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#endif /* _TI_SPIREG_H_ */
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