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drivers/mtd/spi/sf_ops.c
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/* * SPI flash operations * * Copyright (C) 2008 Atmel Corporation * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc. * |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ #include <common.h> |
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#include <malloc.h> |
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#include <spi.h> #include <spi_flash.h> #include <watchdog.h> |
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#include "sf_internal.h" |
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static void spi_flash_addr(u32 addr, u8 *cmd) { /* cmd[0] is actual command */ cmd[1] = addr >> 16; cmd[2] = addr >> 8; cmd[3] = addr >> 0; } int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) { u8 cmd; int ret; cmd = CMD_WRITE_STATUS; ret = spi_flash_write_common(flash, &cmd, 1, &sr, 1); if (ret < 0) { debug("SF: fail to write status register "); return ret; } return 0; } |
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#ifdef CONFIG_SPI_FLASH_MACRONIX int spi_flash_set_qeb_mxic(struct spi_flash *flash) { u8 qeb_status; u8 cmd; int ret; cmd = CMD_READ_STATUS; ret = spi_flash_read_common(flash, &cmd, 1, &qeb_status, 1); if (ret < 0) { debug("SF: fail to read status register "); return ret; } if (qeb_status & STATUS_QEB_MXIC) { debug("SF: Quad enable bit is already set "); } else { ret = spi_flash_cmd_write_status(flash, STATUS_QEB_MXIC); if (ret < 0) return ret; } return ret; } #endif |
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#if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND) |
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static int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr) { u8 data[2]; u8 cmd; int ret; cmd = CMD_READ_STATUS; ret = spi_flash_read_common(flash, &cmd, 1, &data[0], 1); if (ret < 0) { debug("SF: fail to read status register "); return ret; } cmd = CMD_WRITE_STATUS; data[1] = cr; ret = spi_flash_write_common(flash, &cmd, 1, &data, 2); if (ret) { debug("SF: fail to write config register "); return ret; } return 0; } |
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int spi_flash_set_qeb_winspan(struct spi_flash *flash) { u8 qeb_status; u8 cmd; int ret; cmd = CMD_READ_CONFIG; ret = spi_flash_read_common(flash, &cmd, 1, &qeb_status, 1); if (ret < 0) { debug("SF: fail to read config register "); return ret; } if (qeb_status & STATUS_QEB_WINSPAN) { debug("SF: Quad enable bit is already set "); } else { ret = spi_flash_cmd_write_config(flash, STATUS_QEB_WINSPAN); if (ret < 0) return ret; } return ret; } #endif |
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#ifdef CONFIG_SPI_FLASH_BAR |
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static int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel) |
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{ u8 cmd; int ret; if (flash->bank_curr == bank_sel) { debug("SF: not require to enable bank%d ", bank_sel); return 0; } cmd = flash->bank_write_cmd; ret = spi_flash_write_common(flash, &cmd, 1, &bank_sel, 1); if (ret < 0) { debug("SF: fail to write bank register "); return ret; } flash->bank_curr = bank_sel; return 0; } |
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static int spi_flash_bank(struct spi_flash *flash, u32 offset) { u8 bank_sel; int ret; bank_sel = offset / SPI_FLASH_16MB_BOUN; ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); if (ret) { debug("SF: fail to set bank%d ", bank_sel); return ret; } return 0; } |
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#endif int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout) { struct spi_slave *spi = flash->spi; unsigned long timebase; int ret; u8 status; u8 check_status = 0x0; u8 poll_bit = STATUS_WIP; u8 cmd = flash->poll_cmd; if (cmd == CMD_FLAG_STATUS) { poll_bit = STATUS_PEC; check_status = poll_bit; } ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); if (ret) { debug("SF: fail to read %s status register ", cmd == CMD_READ_STATUS ? "read" : "flag"); return ret; } timebase = get_timer(0); do { WATCHDOG_RESET(); ret = spi_xfer(spi, 8, NULL, &status, 0); if (ret) return -1; if ((status & poll_bit) == check_status) break; } while (get_timer(timebase) < timeout); spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); if ((status & poll_bit) == check_status) return 0; /* Timed out */ debug("SF: time out! "); return -1; } int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, size_t cmd_len, const void *buf, size_t buf_len) { struct spi_slave *spi = flash->spi; unsigned long timeout = SPI_FLASH_PROG_TIMEOUT; int ret; if (buf == NULL) timeout = SPI_FLASH_PAGE_ERASE_TIMEOUT; ret = spi_claim_bus(flash->spi); if (ret) { debug("SF: unable to claim SPI bus "); return ret; } ret = spi_flash_cmd_write_enable(flash); if (ret < 0) { debug("SF: enabling write failed "); return ret; } ret = spi_flash_cmd_write(spi, cmd, cmd_len, buf, buf_len); if (ret < 0) { debug("SF: write cmd failed "); return ret; } ret = spi_flash_cmd_wait_ready(flash, timeout); if (ret < 0) { debug("SF: write %s timed out ", timeout == SPI_FLASH_PROG_TIMEOUT ? "program" : "page erase"); return ret; } spi_release_bus(spi); return ret; } |
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int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len) |
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{ u32 erase_size; |
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u8 cmd[SPI_FLASH_CMD_LEN]; |
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int ret = -1; |
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erase_size = flash->erase_size; |
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if (offset % erase_size || len % erase_size) { debug("SF: Erase offset/length not multiple of erase size "); return -1; } |
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cmd[0] = flash->erase_cmd; |
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while (len) { #ifdef CONFIG_SPI_FLASH_BAR |
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ret = spi_flash_bank(flash, offset); if (ret < 0) |
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return ret; |
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#endif spi_flash_addr(offset, cmd); debug("SF: erase %2x %2x %2x %2x (%x) ", cmd[0], cmd[1], cmd[2], cmd[3], offset); ret = spi_flash_write_common(flash, cmd, sizeof(cmd), NULL, 0); if (ret < 0) { debug("SF: erase failed "); break; } offset += erase_size; len -= erase_size; } return ret; } |
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int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset, |
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size_t len, const void *buf) { unsigned long byte_addr, page_size; size_t chunk_len, actual; |
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u8 cmd[SPI_FLASH_CMD_LEN]; |
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int ret = -1; page_size = flash->page_size; |
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cmd[0] = flash->write_cmd; |
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for (actual = 0; actual < len; actual += chunk_len) { #ifdef CONFIG_SPI_FLASH_BAR |
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ret = spi_flash_bank(flash, offset); if (ret < 0) |
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return ret; |
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#endif byte_addr = offset % page_size; chunk_len = min(len - actual, page_size - byte_addr); if (flash->spi->max_write_size) chunk_len = min(chunk_len, flash->spi->max_write_size); spi_flash_addr(offset, cmd); debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu ", buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len); ret = spi_flash_write_common(flash, cmd, sizeof(cmd), buf + actual, chunk_len); if (ret < 0) { debug("SF: write failed "); break; } offset += chunk_len; } return ret; } int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, size_t cmd_len, void *data, size_t data_len) { struct spi_slave *spi = flash->spi; int ret; ret = spi_claim_bus(flash->spi); if (ret) { debug("SF: unable to claim SPI bus "); return ret; } ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len); if (ret < 0) { debug("SF: read cmd failed "); return ret; } spi_release_bus(spi); return ret; } |
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int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset, |
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size_t len, void *data) { |
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u8 *cmd, cmdsz, bank_sel = 0; |
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u32 remain_len, read_len; int ret = -1; /* Handle memory-mapped SPI */ if (flash->memory_map) { |
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ret = spi_claim_bus(flash->spi); if (ret) { debug("SF: unable to claim SPI bus "); return ret; } |
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spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP); |
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memcpy(data, flash->memory_map + offset, len); |
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spi_xfer(flash->spi, 0, NULL, NULL, SPI_XFER_MMAP_END); |
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spi_release_bus(flash->spi); |
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return 0; } |
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cmdsz = SPI_FLASH_CMD_LEN + flash->dummy_byte; cmd = malloc(cmdsz); memset(cmd, 0, cmdsz); |
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cmd[0] = flash->read_cmd; |
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while (len) { #ifdef CONFIG_SPI_FLASH_BAR bank_sel = offset / SPI_FLASH_16MB_BOUN; ret = spi_flash_cmd_bankaddr_write(flash, bank_sel); if (ret) { debug("SF: fail to set bank%d ", bank_sel); return ret; } #endif |
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remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1)) - offset; |
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if (len < remain_len) read_len = len; else read_len = remain_len; spi_flash_addr(offset, cmd); |
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ret = spi_flash_read_common(flash, cmd, cmdsz, data, read_len); |
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if (ret < 0) { debug("SF: read failed "); break; } offset += read_len; len -= read_len; data += read_len; } return ret; } |
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#ifdef CONFIG_SPI_FLASH_SST static int sst_byte_write(struct spi_flash *flash, u32 offset, const void *buf) { int ret; u8 cmd[4] = { CMD_SST_BP, offset >> 16, offset >> 8, offset, }; debug("BP[%02x]: 0x%p => cmd = { 0x%02x 0x%06x } ", spi_w8r8(flash->spi, CMD_READ_STATUS), buf, cmd[0], offset); ret = spi_flash_cmd_write_enable(flash); if (ret) return ret; ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), buf, 1); if (ret) return ret; return spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); } int sst_write_wp(struct spi_flash *flash, u32 offset, size_t len, const void *buf) { size_t actual, cmd_len; int ret; u8 cmd[4]; ret = spi_claim_bus(flash->spi); if (ret) { debug("SF: Unable to claim SPI bus "); return ret; } /* If the data is not word aligned, write out leading single byte */ actual = offset % 2; if (actual) { ret = sst_byte_write(flash, offset, buf); if (ret) goto done; } offset += actual; ret = spi_flash_cmd_write_enable(flash); if (ret) goto done; cmd_len = 4; cmd[0] = CMD_SST_AAI_WP; cmd[1] = offset >> 16; cmd[2] = offset >> 8; cmd[3] = offset; for (; actual < len - 1; actual += 2) { debug("WP[%02x]: 0x%p => cmd = { 0x%02x 0x%06x } ", spi_w8r8(flash->spi, CMD_READ_STATUS), buf + actual, cmd[0], offset); ret = spi_flash_cmd_write(flash->spi, cmd, cmd_len, buf + actual, 2); if (ret) { debug("SF: sst word program failed "); break; } ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); if (ret) break; cmd_len = 1; offset += 2; } if (!ret) ret = spi_flash_cmd_write_disable(flash); /* If there is a single trailing byte, write it out */ if (!ret && actual != len) ret = sst_byte_write(flash, offset, buf + actual); done: debug("SF: sst: program %s %zu bytes @ 0x%zx ", ret ? "failure" : "success", len, offset - actual); spi_release_bus(flash->spi); return ret; } #endif |