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![Heinrich Schuchardt](/assets/img/avatar_default.png)
Compiling drivers/mtd/spi/sandbox.c fails when compiled with
CONFIG_LOG=n:
In file included from include/common.h:20,
from drivers/mtd/spi/sandbox.c:13:
drivers/mtd/spi/sandbox.c:295:15: error: format ‘%s’ expects argument of
type ‘char *’, but argument 7 has type ‘int’ [-Werror=format=]
295 | log_content(" cmd: transition to %s state\n",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/printk.h:37:21: note: in definition of macro ‘pr_fmt’
37 | #define pr_fmt(fmt) fmt
| ^~~
include/log.h:128:30: note: in expansion of macro ‘log_nop’
128 | #define log_content(_fmt...) log_nop(LOG_CATEGORY, \
| ^~~~~~~
drivers/mtd/spi/sandbox.c:295:3: note: in expansion of macro
‘log_content’
295 | log_content(" cmd: transition to %s state\n",
| ^~~~~~~~~~~
drivers/mtd/spi/sandbox.c:295:37: note: format string is defined here
295 | log_content(" cmd: transition to %s state\n",
| ~^
| |
| char *
| %d
Supply function sandbox_sf_state_name() independent of CONFIG_LOG.
Fixes: c3aed5db59
("sandbox: spi: Add more logging")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
607 lines
15 KiB
C
607 lines
15 KiB
C
/*
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* Simulate a SPI flash
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*
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* Copyright (c) 2011-2013 The Chromium OS Authors.
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* Licensed under the GPL-2 or later.
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*/
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#define LOG_CATEGORY UCLASS_SPI_FLASH
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#include <common.h>
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#include <dm.h>
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#include <log.h>
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#include <malloc.h>
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#include <spi.h>
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#include <os.h>
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#include <spi_flash.h>
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#include "sf_internal.h"
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#include <asm/getopt.h>
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#include <asm/spi.h>
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#include <asm/state.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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#include <dm/uclass-internal.h>
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/*
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* The different states that our SPI flash transitions between.
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* We need to keep track of this across multiple xfer calls since
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* the SPI bus could possibly call down into us multiple times.
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*/
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enum sandbox_sf_state {
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SF_CMD, /* default state -- we're awaiting a command */
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SF_ID, /* read the flash's (jedec) ID code */
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SF_ADDR, /* processing the offset in the flash to read/etc... */
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SF_READ, /* reading data from the flash */
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SF_WRITE, /* writing data to the flash, i.e. page programming */
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SF_ERASE, /* erase the flash */
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SF_READ_STATUS, /* read the flash's status register */
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SF_READ_STATUS1, /* read the flash's status register upper 8 bits*/
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SF_WRITE_STATUS, /* write the flash's status register */
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};
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static const char *sandbox_sf_state_name(enum sandbox_sf_state state)
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{
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static const char * const states[] = {
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"CMD", "ID", "ADDR", "READ", "WRITE", "ERASE", "READ_STATUS",
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"READ_STATUS1", "WRITE_STATUS",
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};
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return states[state];
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}
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/* Bits for the status register */
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#define STAT_WIP (1 << 0)
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#define STAT_WEL (1 << 1)
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#define STAT_BP_SHIFT 2
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#define STAT_BP_MASK (7 << STAT_BP_SHIFT)
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/* Assume all SPI flashes have 3 byte addresses since they do atm */
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#define SF_ADDR_LEN 3
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#define IDCODE_LEN 3
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/* Used to quickly bulk erase backing store */
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static u8 sandbox_sf_0xff[0x1000];
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/* Internal state data for each SPI flash */
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struct sandbox_spi_flash {
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unsigned int cs; /* Chip select we are attached to */
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/*
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* As we receive data over the SPI bus, our flash transitions
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* between states. For example, we start off in the SF_CMD
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* state where the first byte tells us what operation to perform
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* (such as read or write the flash). But the operation itself
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* can go through a few states such as first reading in the
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* offset in the flash to perform the requested operation.
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* Thus "state" stores the exact state that our machine is in
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* while "cmd" stores the overall command we're processing.
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*/
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enum sandbox_sf_state state;
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uint cmd;
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/* Erase size of current erase command */
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uint erase_size;
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/* Current position in the flash; used when reading/writing/etc... */
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uint off;
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/* How many address bytes we've consumed */
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uint addr_bytes, pad_addr_bytes;
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/* The current flash status (see STAT_XXX defines above) */
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u16 status;
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/* Data describing the flash we're emulating */
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const struct flash_info *data;
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/* The file on disk to serv up data from */
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int fd;
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};
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struct sandbox_spi_flash_plat_data {
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const char *filename;
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const char *device_name;
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int bus;
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int cs;
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};
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void sandbox_sf_set_block_protect(struct udevice *dev, int bp_mask)
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{
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struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
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sbsf->status &= ~STAT_BP_MASK;
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sbsf->status |= bp_mask << STAT_BP_SHIFT;
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}
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/**
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* This is a very strange probe function. If it has platform data (which may
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* have come from the device tree) then this function gets the filename and
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* device type from there.
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*/
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static int sandbox_sf_probe(struct udevice *dev)
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{
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/* spec = idcode:file */
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struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
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size_t len, idname_len;
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const struct flash_info *data;
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struct sandbox_spi_flash_plat_data *pdata = dev_get_platdata(dev);
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struct sandbox_state *state = state_get_current();
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struct dm_spi_slave_platdata *slave_plat;
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struct udevice *bus = dev->parent;
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const char *spec = NULL;
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struct udevice *emul;
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int ret = 0;
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int cs = -1;
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debug("%s: bus %d, looking for emul=%p: ", __func__, bus->seq, dev);
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ret = sandbox_spi_get_emul(state, bus, dev, &emul);
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if (ret) {
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printf("Error: Unknown chip select for device '%s'\n",
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dev->name);
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return ret;
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}
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slave_plat = dev_get_parent_platdata(dev);
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cs = slave_plat->cs;
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debug("found at cs %d\n", cs);
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if (!pdata->filename) {
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printf("Error: No filename available\n");
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return -EINVAL;
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}
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spec = strchr(pdata->device_name, ',');
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if (spec)
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spec++;
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else
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spec = pdata->device_name;
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idname_len = strlen(spec);
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debug("%s: device='%s'\n", __func__, spec);
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for (data = spi_nor_ids; data->name; data++) {
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len = strlen(data->name);
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if (idname_len != len)
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continue;
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if (!strncasecmp(spec, data->name, len))
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break;
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}
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if (!data->name) {
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printf("%s: unknown flash '%*s'\n", __func__, (int)idname_len,
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spec);
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ret = -EINVAL;
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goto error;
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}
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if (sandbox_sf_0xff[0] == 0x00)
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memset(sandbox_sf_0xff, 0xff, sizeof(sandbox_sf_0xff));
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sbsf->fd = os_open(pdata->filename, 02);
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if (sbsf->fd == -1) {
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printf("%s: unable to open file '%s'\n", __func__,
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pdata->filename);
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ret = -EIO;
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goto error;
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}
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sbsf->data = data;
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sbsf->cs = cs;
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return 0;
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error:
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debug("%s: Got error %d\n", __func__, ret);
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return ret;
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}
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static int sandbox_sf_remove(struct udevice *dev)
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{
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struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
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os_close(sbsf->fd);
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return 0;
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}
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static void sandbox_sf_cs_activate(struct udevice *dev)
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{
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struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
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log_content("sandbox_sf: CS activated; state is fresh!\n");
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/* CS is asserted, so reset state */
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sbsf->off = 0;
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sbsf->addr_bytes = 0;
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sbsf->pad_addr_bytes = 0;
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sbsf->state = SF_CMD;
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sbsf->cmd = SF_CMD;
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}
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static void sandbox_sf_cs_deactivate(struct udevice *dev)
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{
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log_content("sandbox_sf: CS deactivated; cmd done processing!\n");
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}
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/*
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* There are times when the data lines are allowed to tristate. What
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* is actually sensed on the line depends on the hardware. It could
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* always be 0xFF/0x00 (if there are pull ups/downs), or things could
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* float and so we'd get garbage back. This func encapsulates that
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* scenario so we can worry about the details here.
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*/
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static void sandbox_spi_tristate(u8 *buf, uint len)
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{
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/* XXX: make this into a user config option ? */
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memset(buf, 0xff, len);
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}
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/* Figure out what command this stream is telling us to do */
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static int sandbox_sf_process_cmd(struct sandbox_spi_flash *sbsf, const u8 *rx,
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u8 *tx)
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{
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enum sandbox_sf_state oldstate = sbsf->state;
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/* We need to output a byte for the cmd byte we just ate */
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if (tx)
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sandbox_spi_tristate(tx, 1);
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sbsf->cmd = rx[0];
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switch (sbsf->cmd) {
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case SPINOR_OP_RDID:
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sbsf->state = SF_ID;
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sbsf->cmd = SF_ID;
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break;
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case SPINOR_OP_READ_FAST:
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sbsf->pad_addr_bytes = 1;
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case SPINOR_OP_READ:
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case SPINOR_OP_PP:
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sbsf->state = SF_ADDR;
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break;
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case SPINOR_OP_WRDI:
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debug(" write disabled\n");
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sbsf->status &= ~STAT_WEL;
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break;
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case SPINOR_OP_RDSR:
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sbsf->state = SF_READ_STATUS;
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break;
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case SPINOR_OP_RDSR2:
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sbsf->state = SF_READ_STATUS1;
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break;
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case SPINOR_OP_WREN:
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debug(" write enabled\n");
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sbsf->status |= STAT_WEL;
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break;
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case SPINOR_OP_WRSR:
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sbsf->state = SF_WRITE_STATUS;
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break;
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default: {
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int flags = sbsf->data->flags;
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/* we only support erase here */
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if (sbsf->cmd == SPINOR_OP_CHIP_ERASE) {
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sbsf->erase_size = sbsf->data->sector_size *
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sbsf->data->n_sectors;
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} else if (sbsf->cmd == SPINOR_OP_BE_4K && (flags & SECT_4K)) {
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sbsf->erase_size = 4 << 10;
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} else if (sbsf->cmd == SPINOR_OP_SE && !(flags & SECT_4K)) {
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sbsf->erase_size = 64 << 10;
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} else {
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debug(" cmd unknown: %#x\n", sbsf->cmd);
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return -EIO;
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}
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sbsf->state = SF_ADDR;
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break;
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}
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}
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if (oldstate != sbsf->state)
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log_content(" cmd: transition to %s state\n",
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sandbox_sf_state_name(sbsf->state));
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return 0;
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}
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int sandbox_erase_part(struct sandbox_spi_flash *sbsf, int size)
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{
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int todo;
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int ret;
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while (size > 0) {
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todo = min(size, (int)sizeof(sandbox_sf_0xff));
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ret = os_write(sbsf->fd, sandbox_sf_0xff, todo);
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if (ret != todo)
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return ret;
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size -= todo;
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}
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return 0;
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}
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static int sandbox_sf_xfer(struct udevice *dev, unsigned int bitlen,
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const void *rxp, void *txp, unsigned long flags)
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{
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struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
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const uint8_t *rx = rxp;
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uint8_t *tx = txp;
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uint cnt, pos = 0;
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int bytes = bitlen / 8;
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int ret;
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log_content("sandbox_sf: state:%x(%s) bytes:%u\n", sbsf->state,
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sandbox_sf_state_name(sbsf->state), bytes);
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if ((flags & SPI_XFER_BEGIN))
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sandbox_sf_cs_activate(dev);
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if (sbsf->state == SF_CMD) {
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/* Figure out the initial state */
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ret = sandbox_sf_process_cmd(sbsf, rx, tx);
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if (ret)
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return ret;
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++pos;
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}
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/* Process the remaining data */
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while (pos < bytes) {
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switch (sbsf->state) {
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case SF_ID: {
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u8 id;
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log_content(" id: off:%u tx:", sbsf->off);
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if (sbsf->off < IDCODE_LEN) {
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/* Extract correct byte from ID 0x00aabbcc */
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id = ((JEDEC_MFR(sbsf->data) << 16) |
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JEDEC_ID(sbsf->data)) >>
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(8 * (IDCODE_LEN - 1 - sbsf->off));
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} else {
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id = 0;
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}
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log_content("%d %02x\n", sbsf->off, id);
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tx[pos++] = id;
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++sbsf->off;
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break;
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}
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case SF_ADDR:
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log_content(" addr: bytes:%u rx:%02x ",
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sbsf->addr_bytes, rx[pos]);
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if (sbsf->addr_bytes++ < SF_ADDR_LEN)
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sbsf->off = (sbsf->off << 8) | rx[pos];
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log_content("addr:%06x\n", sbsf->off);
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if (tx)
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sandbox_spi_tristate(&tx[pos], 1);
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pos++;
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/* See if we're done processing */
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if (sbsf->addr_bytes <
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SF_ADDR_LEN + sbsf->pad_addr_bytes)
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break;
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/* Next state! */
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if (os_lseek(sbsf->fd, sbsf->off, OS_SEEK_SET) < 0) {
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puts("sandbox_sf: os_lseek() failed");
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return -EIO;
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}
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switch (sbsf->cmd) {
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case SPINOR_OP_READ_FAST:
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case SPINOR_OP_READ:
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sbsf->state = SF_READ;
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break;
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case SPINOR_OP_PP:
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sbsf->state = SF_WRITE;
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break;
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default:
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/* assume erase state ... */
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sbsf->state = SF_ERASE;
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goto case_sf_erase;
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}
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log_content(" cmd: transition to %s state\n",
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sandbox_sf_state_name(sbsf->state));
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break;
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case SF_READ:
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/*
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* XXX: need to handle exotic behavior:
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* - reading past end of device
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*/
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cnt = bytes - pos;
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log_content(" tx: read(%u)\n", cnt);
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assert(tx);
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ret = os_read(sbsf->fd, tx + pos, cnt);
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if (ret < 0) {
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puts("sandbox_sf: os_read() failed\n");
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return -EIO;
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}
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pos += ret;
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break;
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case SF_READ_STATUS:
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log_content(" read status: %#x\n", sbsf->status);
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cnt = bytes - pos;
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memset(tx + pos, sbsf->status, cnt);
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pos += cnt;
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break;
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case SF_READ_STATUS1:
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log_content(" read status: %#x\n", sbsf->status);
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cnt = bytes - pos;
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memset(tx + pos, sbsf->status >> 8, cnt);
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pos += cnt;
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break;
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case SF_WRITE_STATUS:
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log_content(" write status: %#x (ignored)\n", rx[pos]);
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pos = bytes;
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break;
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case SF_WRITE:
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/*
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* XXX: need to handle exotic behavior:
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* - unaligned addresses
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* - more than a page (256) worth of data
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* - reading past end of device
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*/
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if (!(sbsf->status & STAT_WEL)) {
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puts("sandbox_sf: write enable not set before write\n");
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goto done;
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}
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cnt = bytes - pos;
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log_content(" rx: write(%u)\n", cnt);
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if (tx)
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sandbox_spi_tristate(&tx[pos], cnt);
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ret = os_write(sbsf->fd, rx + pos, cnt);
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if (ret < 0) {
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puts("sandbox_spi: os_write() failed\n");
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return -EIO;
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}
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pos += ret;
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sbsf->status &= ~STAT_WEL;
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break;
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case SF_ERASE:
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case_sf_erase: {
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if (!(sbsf->status & STAT_WEL)) {
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puts("sandbox_sf: write enable not set before erase\n");
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goto done;
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}
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/* verify address is aligned */
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if (sbsf->off & (sbsf->erase_size - 1)) {
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log_content(" sector erase: cmd:%#x needs align:%#x, but we got %#x\n",
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sbsf->cmd, sbsf->erase_size,
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sbsf->off);
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sbsf->status &= ~STAT_WEL;
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goto done;
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}
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log_content(" sector erase addr: %u, size: %u\n",
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sbsf->off, sbsf->erase_size);
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cnt = bytes - pos;
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if (tx)
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sandbox_spi_tristate(&tx[pos], cnt);
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pos += cnt;
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/*
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* TODO(vapier@gentoo.org): latch WIP in status, and
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* delay before clearing it ?
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*/
|
|
ret = sandbox_erase_part(sbsf, sbsf->erase_size);
|
|
sbsf->status &= ~STAT_WEL;
|
|
if (ret) {
|
|
log_content("sandbox_sf: Erase failed\n");
|
|
goto done;
|
|
}
|
|
goto done;
|
|
}
|
|
default:
|
|
log_content(" ??? no idea what to do ???\n");
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
done:
|
|
if (flags & SPI_XFER_END)
|
|
sandbox_sf_cs_deactivate(dev);
|
|
return pos == bytes ? 0 : -EIO;
|
|
}
|
|
|
|
int sandbox_sf_ofdata_to_platdata(struct udevice *dev)
|
|
{
|
|
struct sandbox_spi_flash_plat_data *pdata = dev_get_platdata(dev);
|
|
|
|
pdata->filename = dev_read_string(dev, "sandbox,filename");
|
|
pdata->device_name = dev_read_string(dev, "compatible");
|
|
if (!pdata->filename || !pdata->device_name) {
|
|
debug("%s: Missing properties, filename=%s, device_name=%s\n",
|
|
__func__, pdata->filename, pdata->device_name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_spi_emul_ops sandbox_sf_emul_ops = {
|
|
.xfer = sandbox_sf_xfer,
|
|
};
|
|
|
|
#ifdef CONFIG_SPI_FLASH
|
|
int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
|
|
struct udevice *bus, ofnode node, const char *spec)
|
|
{
|
|
struct udevice *emul;
|
|
char name[20], *str;
|
|
struct driver *drv;
|
|
int ret;
|
|
|
|
/* now the emulator */
|
|
strncpy(name, spec, sizeof(name) - 6);
|
|
name[sizeof(name) - 6] = '\0';
|
|
strcat(name, "-emul");
|
|
drv = lists_driver_lookup_name("sandbox_sf_emul");
|
|
if (!drv) {
|
|
puts("Cannot find sandbox_sf_emul driver\n");
|
|
return -ENOENT;
|
|
}
|
|
str = strdup(name);
|
|
if (!str)
|
|
return -ENOMEM;
|
|
ret = device_bind_ofnode(bus, drv, str, NULL, node, &emul);
|
|
if (ret) {
|
|
free(str);
|
|
printf("Cannot create emul device for spec '%s' (err=%d)\n",
|
|
spec, ret);
|
|
return ret;
|
|
}
|
|
state->spi[busnum][cs].emul = emul;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
dev = state->spi[busnum][cs].emul;
|
|
device_remove(dev, DM_REMOVE_NORMAL);
|
|
device_unbind(dev);
|
|
state->spi[busnum][cs].emul = NULL;
|
|
}
|
|
|
|
int sandbox_spi_get_emul(struct sandbox_state *state,
|
|
struct udevice *bus, struct udevice *slave,
|
|
struct udevice **emulp)
|
|
{
|
|
struct sandbox_spi_info *info;
|
|
int busnum = bus->seq;
|
|
int cs = spi_chip_select(slave);
|
|
int ret;
|
|
|
|
info = &state->spi[busnum][cs];
|
|
if (!info->emul) {
|
|
/* Use the same device tree node as the SPI flash device */
|
|
debug("%s: busnum=%u, cs=%u: binding SPI flash emulation: ",
|
|
__func__, busnum, cs);
|
|
ret = sandbox_sf_bind_emul(state, busnum, cs, bus,
|
|
dev_ofnode(slave), slave->name);
|
|
if (ret) {
|
|
debug("failed (err=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
debug("OK\n");
|
|
}
|
|
*emulp = info->emul;
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct udevice_id sandbox_sf_ids[] = {
|
|
{ .compatible = "sandbox,spi-flash" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(sandbox_sf_emul) = {
|
|
.name = "sandbox_sf_emul",
|
|
.id = UCLASS_SPI_EMUL,
|
|
.of_match = sandbox_sf_ids,
|
|
.ofdata_to_platdata = sandbox_sf_ofdata_to_platdata,
|
|
.probe = sandbox_sf_probe,
|
|
.remove = sandbox_sf_remove,
|
|
.priv_auto_alloc_size = sizeof(struct sandbox_spi_flash),
|
|
.platdata_auto_alloc_size = sizeof(struct sandbox_spi_flash_plat_data),
|
|
.ops = &sandbox_sf_emul_ops,
|
|
};
|