1 files changed, 0 insertions, 225 deletions
diff --git a/gpxe/src/drivers/bitbash/spi_bit.c b/gpxe/src/drivers/bitbash/spi_bit.c
deleted file mode 100644
index 8e703936..00000000
--- a/gpxe/src/drivers/bitbash/spi_bit.c
+++ /dev/null
@@ -1,225 +0,0 @@
-/*
- * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-FILE_LICENCE ( GPL2_OR_LATER );
-
-#include <stddef.h>
-#include <stdint.h>
-#include <string.h>
-#include <byteswap.h>
-#include <errno.h>
-#include <assert.h>
-#include <unistd.h>
-#include <gpxe/bitbash.h>
-#include <gpxe/spi_bit.h>
-
-/** @file
- *
- * SPI bit-bashing interface
- *
- */
-
-/** Delay between SCLK changes and around SS changes */
-static void spi_bit_delay ( void ) {
-	udelay ( SPI_BIT_UDELAY );
-}
-
-/** Chip select line will be asserted */
-#define SELECT_SLAVE 0
-
-/** Chip select line will be deasserted */
-#define DESELECT_SLAVE SPI_MODE_SSPOL
-
-/**
- * Select/deselect slave
- *
- * @v spibit		SPI bit-bashing interface
- * @v slave		Slave number
- * @v state		Slave select state
- *
- * @c state must be @c SELECT_SLAVE or @c DESELECT_SLAVE.
- */
-static void spi_bit_set_slave_select ( struct spi_bit_basher *spibit,
-				       unsigned int slave,
-				       unsigned int state ) {
-	struct bit_basher *basher = &spibit->basher;
-
-	state ^= ( spibit->bus.mode & SPI_MODE_SSPOL );
-	DBGC2 ( spibit, "SPIBIT %p setting slave %d select %s\n",
-		spibit, slave, ( state ? "high" : "low" ) );
-
-	spi_bit_delay();
-	write_bit ( basher, SPI_BIT_SS ( slave ), state );
-	spi_bit_delay();
-}
-
-/**
- * Transfer bits over SPI bit-bashing bus
- *
- * @v bus		SPI bus
- * @v data_out		TX data buffer (or NULL)
- * @v data_in		RX data buffer (or NULL)
- * @v len		Length of transfer (in @b bits)
- * @v endianness	Endianness of this data transfer
- *
- * This issues @c len clock cycles on the SPI bus, shifting out data
- * from the @c data_out buffer to the MOSI line and shifting in data
- * from the MISO line to the @c data_in buffer.  If @c data_out is
- * NULL, then the data sent will be all zeroes.  If @c data_in is
- * NULL, then the incoming data will be discarded.
- */
-static void spi_bit_transfer ( struct spi_bit_basher *spibit,
-			       const void *data_out, void *data_in,
-			       unsigned int len, int endianness ) {
-	struct spi_bus *bus = &spibit->bus;
-	struct bit_basher *basher = &spibit->basher;
-	unsigned int sclk = ( ( bus->mode & SPI_MODE_CPOL ) ? 1 : 0 );
-	unsigned int cpha = ( ( bus->mode & SPI_MODE_CPHA ) ? 1 : 0 );
-	unsigned int bit_offset;
-	unsigned int byte_offset;
-	unsigned int byte_mask;
-	unsigned int bit;
-	unsigned int step;
-
-	DBGC2 ( spibit, "SPIBIT %p transferring %d bits in mode %#x\n",
-		spibit, len, bus->mode );
-
-	for ( step = 0 ; step < ( len * 2 ) ; step++ ) {
-		/* Calculate byte offset and byte mask */
-		bit_offset = ( ( endianness == SPI_BIT_BIG_ENDIAN ) ?
-			       ( len - ( step / 2 ) - 1 ) : ( step / 2 ) );
-		byte_offset = ( bit_offset / 8 );
-		byte_mask = ( 1 << ( bit_offset % 8 ) );
-
-		/* Shift data in or out */
-		if ( sclk == cpha ) {
-			const uint8_t *byte;
-
-			/* Shift data out */
-			if ( data_out ) {
-				byte = ( data_out + byte_offset );
-				bit = ( *byte & byte_mask );
-				DBGCP ( spibit, "SPIBIT %p wrote bit %d\n",
-					spibit, ( bit ? 1 : 0 ) );
-			} else {
-				bit = 0;
-			}
-			write_bit ( basher, SPI_BIT_MOSI, bit );
-		} else {
-			uint8_t *byte;
-
-			/* Shift data in */
-			bit = read_bit ( basher, SPI_BIT_MISO );
-			if ( data_in ) {
-				DBGCP ( spibit, "SPIBIT %p read bit %d\n",
-					spibit, ( bit ? 1 : 0 ) );
-				byte = ( data_in + byte_offset );
-				*byte &= ~byte_mask;
-				*byte |= ( bit & byte_mask );
-			}
-		}
-
-		/* Toggle clock line */
-		spi_bit_delay();
-		sclk ^= 1;
-		write_bit ( basher, SPI_BIT_SCLK, sclk );
-	}
-}
-
-/**
- * Read/write data via SPI bit-bashing bus
- *
- * @v bus		SPI bus
- * @v device		SPI device
- * @v command		Command
- * @v address		Address to read/write (<0 for no address)
- * @v data_out		TX data buffer (or NULL)
- * @v data_in		RX data buffer (or NULL)
- * @v len		Length of transfer
- * @ret rc		Return status code
- */
-static int spi_bit_rw ( struct spi_bus *bus, struct spi_device *device,
-			unsigned int command, int address,
-			const void *data_out, void *data_in, size_t len ) {
-	struct spi_bit_basher *spibit
-		= container_of ( bus, struct spi_bit_basher, bus );
-	uint32_t tmp_command;
-	uint32_t tmp_address;
-	uint32_t tmp_address_detect;
-
-	/* Set clock line to idle state */
-	write_bit ( &spibit->basher, SPI_BIT_SCLK, 
-		    ( bus->mode & SPI_MODE_CPOL ) );
-
-	/* Assert chip select on specified slave */
-	spi_bit_set_slave_select ( spibit, device->slave, SELECT_SLAVE );
-
-	/* Transmit command */
-	assert ( device->command_len <= ( 8 * sizeof ( tmp_command ) ) );
-	tmp_command = cpu_to_le32 ( command );
-	spi_bit_transfer ( spibit, &tmp_command, NULL, device->command_len,
-			   SPI_BIT_BIG_ENDIAN );
-
-	/* Transmit address, if present */
-	if ( address >= 0 ) {
-		assert ( device->address_len <= ( 8 * sizeof ( tmp_address )));
-		tmp_address = cpu_to_le32 ( address );
-		if ( device->address_len == SPI_AUTODETECT_ADDRESS_LEN ) {
-			/* Autodetect address length.  This relies on
-			 * the device responding with a dummy zero
-			 * data bit before the first real data bit.
-			 */
-			DBGC ( spibit, "SPIBIT %p autodetecting device "
-			       "address length\n", spibit );
-			assert ( address == 0 );
-			device->address_len = 0;
-			do {
-				spi_bit_transfer ( spibit, &tmp_address,
-						   &tmp_address_detect, 1,
-						   SPI_BIT_BIG_ENDIAN );
-				device->address_len++;
-			} while ( le32_to_cpu ( tmp_address_detect ) & 1 );
-			DBGC ( spibit, "SPIBIT %p autodetected device address "
-			       "length %d\n", spibit, device->address_len );
-		} else {
-			spi_bit_transfer ( spibit, &tmp_address, NULL,
-					   device->address_len,
-					   SPI_BIT_BIG_ENDIAN );
-		}
-	}
-
-	/* Transmit/receive data */
-	spi_bit_transfer ( spibit, data_out, data_in, ( len * 8 ),
-			   spibit->endianness );
-
-	/* Deassert chip select on specified slave */
-	spi_bit_set_slave_select ( spibit, device->slave, DESELECT_SLAVE );
-
-	return 0;
-}
-
-/**
- * Initialise SPI bit-bashing interface
- *
- * @v spibit		SPI bit-bashing interface
- */
-void init_spi_bit_basher ( struct spi_bit_basher *spibit ) {
-	assert ( &spibit->basher.op->read != NULL );
-	assert ( &spibit->basher.op->write != NULL );
-	spibit->bus.rw = spi_bit_rw;
-}