From ca67b09c015d4af3ae3cce12aa72e60941dbb8b5 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 18:29:52 +0200 Subject: Adding debian version 2.06-13+deb12u1. Signed-off-by: Daniel Baumann --- .../disabled/gpxe/src/drivers/nvs/threewire.c | 131 +++++++++++++++++++++ 1 file changed, 131 insertions(+) create mode 100644 debian/grub-extras/disabled/gpxe/src/drivers/nvs/threewire.c (limited to 'debian/grub-extras/disabled/gpxe/src/drivers/nvs/threewire.c') diff --git a/debian/grub-extras/disabled/gpxe/src/drivers/nvs/threewire.c b/debian/grub-extras/disabled/gpxe/src/drivers/nvs/threewire.c new file mode 100644 index 0000000..8e52138 --- /dev/null +++ b/debian/grub-extras/disabled/gpxe/src/drivers/nvs/threewire.c @@ -0,0 +1,131 @@ +/* + * Copyright (C) 2006 Michael Brown . + * + * 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 +#include +#include +#include +#include + +/** @file + * + * Three-wire serial devices + * + */ + +/** + * Read data from three-wire device + * + * @v nvs NVS device + * @v address Address from which to read + * @v data Data buffer + * @v len Length of data buffer + * @ret rc Return status code + */ +int threewire_read ( struct nvs_device *nvs, unsigned int address, + void *data, size_t len ) { + struct spi_device *device = nvs_to_spi ( nvs ); + struct spi_bus *bus = device->bus; + int rc; + + assert ( bus->mode == SPI_MODE_THREEWIRE ); + + DBGC ( device, "3wire %p reading %zd bytes at %04x\n", + device, len, address ); + + if ( ( rc = bus->rw ( bus, device, THREEWIRE_READ, address, + NULL, data, len ) ) != 0 ) { + DBGC ( device, "3wire %p could not read: %s\n", + device, strerror ( rc ) ); + return rc; + } + + return 0; +} + +/** + * Write data to three-wire device + * + * @v nvs NVS device + * @v address Address from which to read + * @v data Data buffer + * @v len Length of data buffer + * @ret rc Return status code + */ +int threewire_write ( struct nvs_device *nvs, unsigned int address, + const void *data, size_t len ) { + struct spi_device *device = nvs_to_spi ( nvs ); + struct spi_bus *bus = device->bus; + int rc; + + assert ( bus->mode == SPI_MODE_THREEWIRE ); + + DBGC ( device, "3wire %p writing %zd bytes at %04x\n", + device, len, address ); + + /* Enable device for writing */ + if ( ( rc = bus->rw ( bus, device, THREEWIRE_EWEN, + THREEWIRE_EWEN_ADDRESS, NULL, NULL, 0 ) ) != 0 ){ + DBGC ( device, "3wire %p could not enable writing: %s\n", + device, strerror ( rc ) ); + return rc; + } + + /* Write data */ + if ( ( rc = bus->rw ( bus, device, THREEWIRE_WRITE, address, + data, NULL, len ) ) != 0 ) { + DBGC ( device, "3wire %p could not write: %s\n", + device, strerror ( rc ) ); + return rc; + } + + /* Our model of an SPI bus doesn't provide a mechanism for + * "assert CS, wait for MISO to become high, so just wait for + * long enough to ensure that the write has completed. + */ + mdelay ( THREEWIRE_WRITE_MDELAY ); + + return 0; +} + +/** + * Autodetect device address length + * + * @v device SPI device + * @ret rc Return status code + */ +int threewire_detect_address_len ( struct spi_device *device ) { + struct nvs_device *nvs = &device->nvs; + int rc; + + DBGC ( device, "3wire %p autodetecting address length\n", device ); + + device->address_len = SPI_AUTODETECT_ADDRESS_LEN; + if ( ( rc = threewire_read ( nvs, 0, NULL, + ( 1 << nvs->word_len_log2 ) ) ) != 0 ) { + DBGC ( device, "3wire %p could not autodetect address " + "length: %s\n", device, strerror ( rc ) ); + return rc; + } + + DBGC ( device, "3wire %p autodetected address length %d\n", + device, device->address_len ); + return 0; +} -- cgit v1.2.3