diff options
Diffstat (limited to 'firmware/microblaze/usrp2p/spi_flash_read.c')
-rw-r--r-- | firmware/microblaze/usrp2p/spi_flash_read.c | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/firmware/microblaze/usrp2p/spi_flash_read.c b/firmware/microblaze/usrp2p/spi_flash_read.c deleted file mode 100644 index 4682c5fe6..000000000 --- a/firmware/microblaze/usrp2p/spi_flash_read.c +++ /dev/null @@ -1,119 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2009 Free Software Foundation, Inc. - * Copyright 2009 Ettus Research LLC - * - * 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 3 of the License, or - * (at your option) 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, see <http://www.gnu.org/licenses/>. - */ - -#include "spi_flash_private.h" -#include <stdlib.h> // abort - -static size_t _spi_flash_log2_memory_size; - -uint32_t -spi_flash_rdid(void) -{ - return spif_transact(SPI_TXRX, SPI_SS_FLASH, RDID_CMD << 24, 32, FLAGS) & 0xffffff; -} - -size_t -spi_flash_log2_sector_size(void) -{ - static size_t _spi_flash_log2_sector_size; - - if (_spi_flash_log2_sector_size != 0) - return _spi_flash_log2_sector_size; - - - uint32_t id = spi_flash_rdid(); - int type = (id >> 8) & 0xff; - int size = id & 0xff; - if (type != 0x20 || size < 22 || size > 24) - abort(); - - static unsigned char log2_sector_size[3] = { - 16, /* M25P32 */ - 16, /* M25P64 */ - 18, /* M25P128 */ - }; - - _spi_flash_log2_sector_size = log2_sector_size[size - 22]; - _spi_flash_log2_memory_size = size; //while we're at it - return _spi_flash_log2_sector_size; -} - -size_t -spi_flash_log2_memory_size(void) -{ - if (_spi_flash_log2_memory_size != 0) - return _spi_flash_log2_memory_size; - - uint32_t id = spi_flash_rdid(); - int type = (id >> 8) & 0xff; - int size = id & 0xff; - if (type != 0x20 || size < 22 || size > 24) - abort(); - - _spi_flash_log2_memory_size = size; - return _spi_flash_log2_memory_size; -} - -void -spi_flash_read(uint32_t flash_addr, size_t nbytes, void *buf) -{ - /* - * We explicitly control the slave select here (/S), so that we can - * do the entire read operation as a single transaction from - * device's point of view. (The most our SPI peripheral can transfer - * in a single shot is 16 bytes.) - */ - spif_wait(); - - spif_regs->ss = 0; - spif_regs->ctrl = FLAGS; // ASS is now clear and no chip select is enabled. - - /* - * Do the 5 byte instruction tranfer: - * FAST_READ_CMD, ADDR2, ADDR1, ADDR0, DUMMY - */ - spif_regs->txrx1 = FAST_READ_CMD; - spif_regs->txrx0 = ((flash_addr & 0x00ffffff) << 8); - spif_regs->ss = SPI_SS_FLASH; // assert chip select - spif_regs->ctrl = FLAGS | LEN(5 * 8); - spif_regs->ctrl = FLAGS | LEN(5 * 8) | SPI_CTRL_GO_BSY; - spif_wait(); - - /* - * Read up to 16 bytes at a time until done - */ - unsigned char *dst = (unsigned char *) buf; - size_t m; - for (size_t n = 0; n < nbytes; n += m, dst += m){ - spif_regs->ctrl = FLAGS | LEN(16 * 8); // xfer 16 bytes - spif_regs->ctrl = FLAGS | LEN(16 * 8) | SPI_CTRL_GO_BSY; - spif_wait(); - - uint32_t w[4]; - w[0] = spif_regs->txrx3; // txrx3 has first bits in it - w[1] = spif_regs->txrx2; - w[2] = spif_regs->txrx1; - w[3] = spif_regs->txrx0; - unsigned char *src = (unsigned char *) &w[0]; - m = min(nbytes - n, 16); - for (size_t i = 0; i < m; i++) - dst[i] = src[i]; - } - spif_regs->ss = 0; // deassert chip select -} |