mirror of
https://github.com/AsahiLinux/u-boot
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2e192b245e
Now that they are in their own directory, we can remove this prefix. This makes it easier to find a file since the prefix does not get in the way. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Heiko Schocher <hs@denx.de> Acked-by: Stefan Roese <sr@denx.de> Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
618 lines
14 KiB
C
618 lines
14 KiB
C
/*
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* Command for accessing SPI flash.
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*
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* Copyright (C) 2008 Atmel Corporation
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <div64.h>
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#include <dm.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <spi.h>
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#include <spi_flash.h>
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#include <jffs2/jffs2.h>
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#include <linux/mtd/mtd.h>
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#include <asm/io.h>
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#include <dm/device-internal.h>
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static struct spi_flash *flash;
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/*
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* This function computes the length argument for the erase command.
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* The length on which the command is to operate can be given in two forms:
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* 1. <cmd> offset len - operate on <'offset', 'len')
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* 2. <cmd> offset +len - operate on <'offset', 'round_up(len)')
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* If the second form is used and the length doesn't fall on the
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* sector boundary, than it will be adjusted to the next sector boundary.
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* If it isn't in the flash, the function will fail (return -1).
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* Input:
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* arg: length specification (i.e. both command arguments)
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* Output:
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* len: computed length for operation
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* Return:
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* 1: success
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* -1: failure (bad format, bad address).
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*/
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static int sf_parse_len_arg(char *arg, ulong *len)
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{
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char *ep;
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char round_up_len; /* indicates if the "+length" form used */
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ulong len_arg;
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round_up_len = 0;
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if (*arg == '+') {
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round_up_len = 1;
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++arg;
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}
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len_arg = simple_strtoul(arg, &ep, 16);
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if (ep == arg || *ep != '\0')
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return -1;
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if (round_up_len && flash->sector_size > 0)
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*len = ROUND(len_arg, flash->sector_size);
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else
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*len = len_arg;
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return 1;
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}
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/**
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* This function takes a byte length and a delta unit of time to compute the
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* approximate bytes per second
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*
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* @param len amount of bytes currently processed
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* @param start_ms start time of processing in ms
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* @return bytes per second if OK, 0 on error
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*/
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static ulong bytes_per_second(unsigned int len, ulong start_ms)
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{
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/* less accurate but avoids overflow */
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if (len >= ((unsigned int) -1) / 1024)
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return len / (max(get_timer(start_ms) / 1024, 1UL));
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else
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return 1024 * len / max(get_timer(start_ms), 1UL);
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}
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static int do_spi_flash_probe(int argc, char * const argv[])
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{
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unsigned int bus = CONFIG_SF_DEFAULT_BUS;
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unsigned int cs = CONFIG_SF_DEFAULT_CS;
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unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
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unsigned int mode = CONFIG_SF_DEFAULT_MODE;
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char *endp;
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#ifdef CONFIG_DM_SPI_FLASH
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struct udevice *new, *bus_dev;
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int ret;
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#else
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struct spi_flash *new;
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#endif
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if (argc >= 2) {
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cs = simple_strtoul(argv[1], &endp, 0);
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if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
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return -1;
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if (*endp == ':') {
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if (endp[1] == 0)
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return -1;
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bus = cs;
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cs = simple_strtoul(endp + 1, &endp, 0);
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if (*endp != 0)
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return -1;
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}
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}
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if (argc >= 3) {
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speed = simple_strtoul(argv[2], &endp, 0);
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if (*argv[2] == 0 || *endp != 0)
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return -1;
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}
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if (argc >= 4) {
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mode = simple_strtoul(argv[3], &endp, 16);
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if (*argv[3] == 0 || *endp != 0)
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return -1;
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}
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#ifdef CONFIG_DM_SPI_FLASH
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/* Remove the old device, otherwise probe will just be a nop */
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ret = spi_find_bus_and_cs(bus, cs, &bus_dev, &new);
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if (!ret) {
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device_remove(new);
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device_unbind(new);
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}
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flash = NULL;
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ret = spi_flash_probe_bus_cs(bus, cs, speed, mode, &new);
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if (ret) {
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printf("Failed to initialize SPI flash at %u:%u (error %d)\n",
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bus, cs, ret);
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return 1;
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}
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flash = dev_get_uclass_priv(new);
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#else
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if (flash)
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spi_flash_free(flash);
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new = spi_flash_probe(bus, cs, speed, mode);
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flash = new;
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if (!new) {
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printf("Failed to initialize SPI flash at %u:%u\n", bus, cs);
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return 1;
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}
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flash = new;
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#endif
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return 0;
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}
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/**
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* Write a block of data to SPI flash, first checking if it is different from
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* what is already there.
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*
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* If the data being written is the same, then *skipped is incremented by len.
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*
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* @param flash flash context pointer
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* @param offset flash offset to write
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* @param len number of bytes to write
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* @param buf buffer to write from
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* @param cmp_buf read buffer to use to compare data
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* @param skipped Count of skipped data (incremented by this function)
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* @return NULL if OK, else a string containing the stage which failed
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*/
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static const char *spi_flash_update_block(struct spi_flash *flash, u32 offset,
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size_t len, const char *buf, char *cmp_buf, size_t *skipped)
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{
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char *ptr = (char *)buf;
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debug("offset=%#x, sector_size=%#x, len=%#zx\n",
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offset, flash->sector_size, len);
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/* Read the entire sector so to allow for rewriting */
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if (spi_flash_read(flash, offset, flash->sector_size, cmp_buf))
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return "read";
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/* Compare only what is meaningful (len) */
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if (memcmp(cmp_buf, buf, len) == 0) {
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debug("Skip region %x size %zx: no change\n",
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offset, len);
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*skipped += len;
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return NULL;
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}
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/* Erase the entire sector */
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if (spi_flash_erase(flash, offset, flash->sector_size))
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return "erase";
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/* If it's a partial sector, copy the data into the temp-buffer */
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if (len != flash->sector_size) {
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memcpy(cmp_buf, buf, len);
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ptr = cmp_buf;
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}
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/* Write one complete sector */
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if (spi_flash_write(flash, offset, flash->sector_size, ptr))
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return "write";
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return NULL;
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}
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/**
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* Update an area of SPI flash by erasing and writing any blocks which need
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* to change. Existing blocks with the correct data are left unchanged.
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*
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* @param flash flash context pointer
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* @param offset flash offset to write
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* @param len number of bytes to write
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* @param buf buffer to write from
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* @return 0 if ok, 1 on error
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*/
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static int spi_flash_update(struct spi_flash *flash, u32 offset,
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size_t len, const char *buf)
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{
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const char *err_oper = NULL;
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char *cmp_buf;
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const char *end = buf + len;
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size_t todo; /* number of bytes to do in this pass */
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size_t skipped = 0; /* statistics */
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const ulong start_time = get_timer(0);
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size_t scale = 1;
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const char *start_buf = buf;
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ulong delta;
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if (end - buf >= 200)
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scale = (end - buf) / 100;
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cmp_buf = memalign(ARCH_DMA_MINALIGN, flash->sector_size);
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if (cmp_buf) {
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ulong last_update = get_timer(0);
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for (; buf < end && !err_oper; buf += todo, offset += todo) {
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todo = min_t(size_t, end - buf, flash->sector_size);
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if (get_timer(last_update) > 100) {
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printf(" \rUpdating, %zu%% %lu B/s",
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100 - (end - buf) / scale,
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bytes_per_second(buf - start_buf,
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start_time));
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last_update = get_timer(0);
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}
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err_oper = spi_flash_update_block(flash, offset, todo,
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buf, cmp_buf, &skipped);
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}
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} else {
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err_oper = "malloc";
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}
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free(cmp_buf);
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putc('\r');
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if (err_oper) {
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printf("SPI flash failed in %s step\n", err_oper);
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return 1;
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}
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delta = get_timer(start_time);
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printf("%zu bytes written, %zu bytes skipped", len - skipped,
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skipped);
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printf(" in %ld.%lds, speed %ld B/s\n",
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delta / 1000, delta % 1000, bytes_per_second(len, start_time));
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return 0;
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}
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static int do_spi_flash_read_write(int argc, char * const argv[])
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{
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unsigned long addr;
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void *buf;
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char *endp;
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int ret = 1;
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int dev = 0;
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loff_t offset, len, maxsize;
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if (argc < 3)
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return -1;
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addr = simple_strtoul(argv[1], &endp, 16);
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if (*argv[1] == 0 || *endp != 0)
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return -1;
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if (mtd_arg_off_size(argc - 2, &argv[2], &dev, &offset, &len,
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&maxsize, MTD_DEV_TYPE_NOR, flash->size))
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return -1;
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/* Consistency checking */
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if (offset + len > flash->size) {
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printf("ERROR: attempting %s past flash size (%#x)\n",
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argv[0], flash->size);
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return 1;
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}
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buf = map_physmem(addr, len, MAP_WRBACK);
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if (!buf) {
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puts("Failed to map physical memory\n");
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return 1;
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}
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if (strcmp(argv[0], "update") == 0) {
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ret = spi_flash_update(flash, offset, len, buf);
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} else if (strncmp(argv[0], "read", 4) == 0 ||
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strncmp(argv[0], "write", 5) == 0) {
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int read;
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read = strncmp(argv[0], "read", 4) == 0;
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if (read)
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ret = spi_flash_read(flash, offset, len, buf);
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else
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ret = spi_flash_write(flash, offset, len, buf);
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printf("SF: %zu bytes @ %#x %s: ", (size_t)len, (u32)offset,
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read ? "Read" : "Written");
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if (ret)
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printf("ERROR %d\n", ret);
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else
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printf("OK\n");
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}
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unmap_physmem(buf, len);
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return ret == 0 ? 0 : 1;
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}
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static int do_spi_flash_erase(int argc, char * const argv[])
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{
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int ret;
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int dev = 0;
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loff_t offset, len, maxsize;
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ulong size;
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if (argc < 3)
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return -1;
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if (mtd_arg_off(argv[1], &dev, &offset, &len, &maxsize,
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MTD_DEV_TYPE_NOR, flash->size))
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return -1;
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ret = sf_parse_len_arg(argv[2], &size);
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if (ret != 1)
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return -1;
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/* Consistency checking */
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if (offset + size > flash->size) {
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printf("ERROR: attempting %s past flash size (%#x)\n",
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argv[0], flash->size);
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return 1;
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}
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ret = spi_flash_erase(flash, offset, size);
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printf("SF: %zu bytes @ %#x Erased: %s\n", (size_t)size, (u32)offset,
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ret ? "ERROR" : "OK");
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return ret == 0 ? 0 : 1;
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}
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static int do_spi_protect(int argc, char * const argv[])
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{
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int ret = 0;
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loff_t start, len;
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bool prot = false;
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if (argc != 4)
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return -1;
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if (!str2off(argv[2], &start)) {
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puts("start sector is not a valid number\n");
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return 1;
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}
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if (!str2off(argv[3], &len)) {
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puts("len is not a valid number\n");
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return 1;
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}
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if (strcmp(argv[1], "lock") == 0)
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prot = true;
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else if (strcmp(argv[1], "unlock") == 0)
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prot = false;
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else
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return -1; /* Unknown parameter */
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ret = spi_flash_protect(flash, start, len, prot);
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return ret == 0 ? 0 : 1;
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}
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#ifdef CONFIG_CMD_SF_TEST
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enum {
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STAGE_ERASE,
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STAGE_CHECK,
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STAGE_WRITE,
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STAGE_READ,
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STAGE_COUNT,
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};
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static char *stage_name[STAGE_COUNT] = {
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"erase",
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"check",
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"write",
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"read",
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};
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struct test_info {
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int stage;
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int bytes;
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unsigned base_ms;
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unsigned time_ms[STAGE_COUNT];
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};
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static void show_time(struct test_info *test, int stage)
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{
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uint64_t speed; /* KiB/s */
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int bps; /* Bits per second */
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speed = (long long)test->bytes * 1000;
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if (test->time_ms[stage])
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do_div(speed, test->time_ms[stage] * 1024);
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bps = speed * 8;
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printf("%d %s: %d ticks, %d KiB/s %d.%03d Mbps\n", stage,
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stage_name[stage], test->time_ms[stage],
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(int)speed, bps / 1000, bps % 1000);
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}
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static void spi_test_next_stage(struct test_info *test)
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{
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test->time_ms[test->stage] = get_timer(test->base_ms);
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show_time(test, test->stage);
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test->base_ms = get_timer(0);
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test->stage++;
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}
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/**
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* Run a test on the SPI flash
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*
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* @param flash SPI flash to use
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* @param buf Source buffer for data to write
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* @param len Size of data to read/write
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* @param offset Offset within flash to check
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* @param vbuf Verification buffer
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* @return 0 if ok, -1 on error
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*/
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static int spi_flash_test(struct spi_flash *flash, uint8_t *buf, ulong len,
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ulong offset, uint8_t *vbuf)
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{
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struct test_info test;
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int i;
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printf("SPI flash test:\n");
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memset(&test, '\0', sizeof(test));
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test.base_ms = get_timer(0);
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test.bytes = len;
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if (spi_flash_erase(flash, offset, len)) {
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printf("Erase failed\n");
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return -1;
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}
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spi_test_next_stage(&test);
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if (spi_flash_read(flash, offset, len, vbuf)) {
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printf("Check read failed\n");
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return -1;
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}
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for (i = 0; i < len; i++) {
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if (vbuf[i] != 0xff) {
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printf("Check failed at %d\n", i);
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print_buffer(i, vbuf + i, 1,
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min_t(uint, len - i, 0x40), 0);
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return -1;
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}
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}
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spi_test_next_stage(&test);
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if (spi_flash_write(flash, offset, len, buf)) {
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printf("Write failed\n");
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return -1;
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}
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memset(vbuf, '\0', len);
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spi_test_next_stage(&test);
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if (spi_flash_read(flash, offset, len, vbuf)) {
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printf("Read failed\n");
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return -1;
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}
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spi_test_next_stage(&test);
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for (i = 0; i < len; i++) {
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if (buf[i] != vbuf[i]) {
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printf("Verify failed at %d, good data:\n", i);
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print_buffer(i, buf + i, 1,
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min_t(uint, len - i, 0x40), 0);
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printf("Bad data:\n");
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print_buffer(i, vbuf + i, 1,
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min_t(uint, len - i, 0x40), 0);
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return -1;
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}
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}
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printf("Test passed\n");
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for (i = 0; i < STAGE_COUNT; i++)
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show_time(&test, i);
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return 0;
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}
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static int do_spi_flash_test(int argc, char * const argv[])
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{
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unsigned long offset;
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unsigned long len;
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uint8_t *buf, *from;
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char *endp;
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uint8_t *vbuf;
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int ret;
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if (argc < 3)
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return -1;
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offset = simple_strtoul(argv[1], &endp, 16);
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if (*argv[1] == 0 || *endp != 0)
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return -1;
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len = simple_strtoul(argv[2], &endp, 16);
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if (*argv[2] == 0 || *endp != 0)
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return -1;
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vbuf = memalign(ARCH_DMA_MINALIGN, len);
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if (!vbuf) {
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printf("Cannot allocate memory (%lu bytes)\n", len);
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return 1;
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}
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buf = memalign(ARCH_DMA_MINALIGN, len);
|
|
if (!buf) {
|
|
free(vbuf);
|
|
printf("Cannot allocate memory (%lu bytes)\n", len);
|
|
return 1;
|
|
}
|
|
|
|
from = map_sysmem(CONFIG_SYS_TEXT_BASE, 0);
|
|
memcpy(buf, from, len);
|
|
ret = spi_flash_test(flash, buf, len, offset, vbuf);
|
|
free(vbuf);
|
|
free(buf);
|
|
if (ret) {
|
|
printf("Test failed\n");
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_CMD_SF_TEST */
|
|
|
|
static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc,
|
|
char * const argv[])
|
|
{
|
|
const char *cmd;
|
|
int ret;
|
|
|
|
/* need at least two arguments */
|
|
if (argc < 2)
|
|
goto usage;
|
|
|
|
cmd = argv[1];
|
|
--argc;
|
|
++argv;
|
|
|
|
if (strcmp(cmd, "probe") == 0) {
|
|
ret = do_spi_flash_probe(argc, argv);
|
|
goto done;
|
|
}
|
|
|
|
/* The remaining commands require a selected device */
|
|
if (!flash) {
|
|
puts("No SPI flash selected. Please run `sf probe'\n");
|
|
return 1;
|
|
}
|
|
|
|
if (strcmp(cmd, "read") == 0 || strcmp(cmd, "write") == 0 ||
|
|
strcmp(cmd, "update") == 0)
|
|
ret = do_spi_flash_read_write(argc, argv);
|
|
else if (strcmp(cmd, "erase") == 0)
|
|
ret = do_spi_flash_erase(argc, argv);
|
|
else if (strcmp(cmd, "protect") == 0)
|
|
ret = do_spi_protect(argc, argv);
|
|
#ifdef CONFIG_CMD_SF_TEST
|
|
else if (!strcmp(cmd, "test"))
|
|
ret = do_spi_flash_test(argc, argv);
|
|
#endif
|
|
else
|
|
ret = -1;
|
|
|
|
done:
|
|
if (ret != -1)
|
|
return ret;
|
|
|
|
usage:
|
|
return CMD_RET_USAGE;
|
|
}
|
|
|
|
#ifdef CONFIG_CMD_SF_TEST
|
|
#define SF_TEST_HELP "\nsf test offset len " \
|
|
"- run a very basic destructive test"
|
|
#else
|
|
#define SF_TEST_HELP
|
|
#endif
|
|
|
|
U_BOOT_CMD(
|
|
sf, 5, 1, do_spi_flash,
|
|
"SPI flash sub-system",
|
|
"probe [[bus:]cs] [hz] [mode] - init flash device on given SPI bus\n"
|
|
" and chip select\n"
|
|
"sf read addr offset|partition len - read `len' bytes starting at\n"
|
|
" `offset' or from start of mtd\n"
|
|
" `partition'to memory at `addr'\n"
|
|
"sf write addr offset|partition len - write `len' bytes from memory\n"
|
|
" at `addr' to flash at `offset'\n"
|
|
" or to start of mtd `partition'\n"
|
|
"sf erase offset|partition [+]len - erase `len' bytes from `offset'\n"
|
|
" or from start of mtd `partition'\n"
|
|
" `+len' round up `len' to block size\n"
|
|
"sf update addr offset|partition len - erase and write `len' bytes from memory\n"
|
|
" at `addr' to flash at `offset'\n"
|
|
" or to start of mtd `partition'\n"
|
|
"sf protect lock/unlock sector len - protect/unprotect 'len' bytes starting\n"
|
|
" at address 'sector'\n"
|
|
SF_TEST_HELP
|
|
);
|