#include <linux/debugfs.h>
#include <linux/mtd/spi-nor.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi-mem.h>
#include "core.h"
#define SPI_NOR_DEBUGFS_ROOT "spi-nor"
#define SNOR_F_NAME(name) [ilog2(SNOR_F_##name)] = #name
static const char *const snor_f_names[] = {
SNOR_F_NAME(HAS_SR_TB),
SNOR_F_NAME(NO_OP_CHIP_ERASE),
SNOR_F_NAME(BROKEN_RESET),
SNOR_F_NAME(4B_OPCODES),
SNOR_F_NAME(HAS_4BAIT),
SNOR_F_NAME(HAS_LOCK),
SNOR_F_NAME(HAS_16BIT_SR),
SNOR_F_NAME(NO_READ_CR),
SNOR_F_NAME(HAS_SR_TB_BIT6),
SNOR_F_NAME(HAS_4BIT_BP),
SNOR_F_NAME(HAS_SR_BP3_BIT6),
SNOR_F_NAME(IO_MODE_EN_VOLATILE),
SNOR_F_NAME(SOFT_RESET),
SNOR_F_NAME(SWP_IS_VOLATILE),
SNOR_F_NAME(RWW),
SNOR_F_NAME(ECC),
SNOR_F_NAME(NO_WP),
};
#undef SNOR_F_NAME
static const char *spi_nor_protocol_name(enum spi_nor_protocol proto)
{
switch (proto) {
case SNOR_PROTO_1_1_1: return "1S-1S-1S";
case SNOR_PROTO_1_1_2: return "1S-1S-2S";
case SNOR_PROTO_1_1_4: return "1S-1S-4S";
case SNOR_PROTO_1_1_8: return "1S-1S-8S";
case SNOR_PROTO_1_2_2: return "1S-2S-2S";
case SNOR_PROTO_1_4_4: return "1S-4S-4S";
case SNOR_PROTO_1_8_8: return "1S-8S-8S";
case SNOR_PROTO_2_2_2: return "2S-2S-2S";
case SNOR_PROTO_4_4_4: return "4S-4S-4S";
case SNOR_PROTO_8_8_8: return "8S-8S-8S";
case SNOR_PROTO_1_1_1_DTR: return "1D-1D-1D";
case SNOR_PROTO_1_2_2_DTR: return "1D-2D-2D";
case SNOR_PROTO_1_4_4_DTR: return "1D-4D-4D";
case SNOR_PROTO_1_8_8_DTR: return "1D-8D-8D";
case SNOR_PROTO_8_8_8_DTR: return "8D-8D-8D";
}
return "<unknown>";
}
static void spi_nor_print_flags(struct seq_file *s, unsigned long flags,
const char *const *names, int names_len)
{
bool sep = false;
int i;
for (i = 0; i < sizeof(flags) * BITS_PER_BYTE; i++) {
if (!(flags & BIT(i)))
continue;
if (sep)
seq_puts(s, " | ");
sep = true;
if (i < names_len && names[i])
seq_puts(s, names[i]);
else
seq_printf(s, "1<<%d", i);
}
}
static int spi_nor_params_show(struct seq_file *s, void *data)
{
struct spi_nor *nor = s->private;
struct spi_nor_flash_parameter *params = nor->params;
struct spi_nor_erase_map *erase_map = ¶ms->erase_map;
struct spi_nor_erase_region *region = erase_map->regions;
const struct flash_info *info = nor->info;
char buf[16], *str;
unsigned int i;
seq_printf(s, "name\t\t%s\n", info->name);
seq_printf(s, "id\t\t%*ph\n", SPI_NOR_MAX_ID_LEN, nor->id);
string_get_size(params->size, 1, STRING_UNITS_2, buf, sizeof(buf));
seq_printf(s, "size\t\t%s\n", buf);
seq_printf(s, "write size\t%u\n", params->writesize);
seq_printf(s, "page size\t%u\n", params->page_size);
seq_printf(s, "address nbytes\t%u\n", nor->addr_nbytes);
seq_puts(s, "flags\t\t");
spi_nor_print_flags(s, nor->flags, snor_f_names, sizeof(snor_f_names));
seq_puts(s, "\n");
seq_puts(s, "\nopcodes\n");
seq_printf(s, " read\t\t0x%02x\n", nor->read_opcode);
seq_printf(s, " dummy cycles\t%u\n", nor->read_dummy);
seq_printf(s, " erase\t\t0x%02x\n", nor->erase_opcode);
seq_printf(s, " program\t0x%02x\n", nor->program_opcode);
switch (nor->cmd_ext_type) {
case SPI_NOR_EXT_NONE:
str = "none";
break;
case SPI_NOR_EXT_REPEAT:
str = "repeat";
break;
case SPI_NOR_EXT_INVERT:
str = "invert";
break;
default:
str = "<unknown>";
break;
}
seq_printf(s, " 8D extension\t%s\n", str);
seq_puts(s, "\nprotocols\n");
seq_printf(s, " read\t\t%s\n",
spi_nor_protocol_name(nor->read_proto));
seq_printf(s, " write\t\t%s\n",
spi_nor_protocol_name(nor->write_proto));
seq_printf(s, " register\t%s\n",
spi_nor_protocol_name(nor->reg_proto));
seq_puts(s, "\nerase commands\n");
for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++) {
struct spi_nor_erase_type *et = &erase_map->erase_type[i];
if (et->size) {
string_get_size(et->size, 1, STRING_UNITS_2, buf,
sizeof(buf));
seq_printf(s, " %02x (%s) [%d]\n", et->opcode, buf, i);
}
}
if (!(nor->flags & SNOR_F_NO_OP_CHIP_ERASE)) {
string_get_size(params->size, 1, STRING_UNITS_2, buf, sizeof(buf));
seq_printf(s, " %02x (%s)\n", nor->params->die_erase_opcode, buf);
}
seq_puts(s, "\nsector map\n");
seq_puts(s, " region (in hex) | erase mask | overlaid\n");
seq_puts(s, " ------------------+------------+----------\n");
for (i = 0; i < erase_map->n_regions; i++) {
u64 start = region[i].offset;
u64 end = start + region[i].size - 1;
u8 erase_mask = region[i].erase_mask;
seq_printf(s, " %08llx-%08llx | [%c%c%c%c] | %s\n",
start, end,
erase_mask & BIT(0) ? '0' : ' ',
erase_mask & BIT(1) ? '1' : ' ',
erase_mask & BIT(2) ? '2' : ' ',
erase_mask & BIT(3) ? '3' : ' ',
region[i].overlaid ? "yes" : "no");
}
return 0;
}
DEFINE_SHOW_ATTRIBUTE(spi_nor_params);
static void spi_nor_print_read_cmd(struct seq_file *s, u32 cap,
struct spi_nor_read_command *cmd)
{
seq_printf(s, " %s%s\n", spi_nor_protocol_name(cmd->proto),
cap == SNOR_HWCAPS_READ_FAST ? " (fast read)" : "");
seq_printf(s, " opcode\t0x%02x\n", cmd->opcode);
seq_printf(s, " mode cycles\t%u\n", cmd->num_mode_clocks);
seq_printf(s, " dummy cycles\t%u\n", cmd->num_wait_states);
}
static void spi_nor_print_pp_cmd(struct seq_file *s,
struct spi_nor_pp_command *cmd)
{
seq_printf(s, " %s\n", spi_nor_protocol_name(cmd->proto));
seq_printf(s, " opcode\t0x%02x\n", cmd->opcode);
}
static int spi_nor_capabilities_show(struct seq_file *s, void *data)
{
struct spi_nor *nor = s->private;
struct spi_nor_flash_parameter *params = nor->params;
u32 hwcaps = params->hwcaps.mask;
int i, cmd;
seq_puts(s, "Supported read modes by the flash\n");
for (i = 0; i < sizeof(hwcaps) * BITS_PER_BYTE; i++) {
if (!(hwcaps & BIT(i)))
continue;
cmd = spi_nor_hwcaps_read2cmd(BIT(i));
if (cmd < 0)
continue;
spi_nor_print_read_cmd(s, BIT(i), ¶ms->reads[cmd]);
hwcaps &= ~BIT(i);
}
seq_puts(s, "\nSupported page program modes by the flash\n");
for (i = 0; i < sizeof(hwcaps) * BITS_PER_BYTE; i++) {
if (!(hwcaps & BIT(i)))
continue;
cmd = spi_nor_hwcaps_pp2cmd(BIT(i));
if (cmd < 0)
continue;
spi_nor_print_pp_cmd(s, ¶ms->page_programs[cmd]);
hwcaps &= ~BIT(i);
}
if (hwcaps)
seq_printf(s, "\nunknown hwcaps 0x%x\n", hwcaps);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(spi_nor_capabilities);
static void spi_nor_debugfs_unregister(void *data)
{
struct spi_nor *nor = data;
debugfs_remove(nor->debugfs_root);
nor->debugfs_root = NULL;
}
static struct dentry *rootdir;
void spi_nor_debugfs_register(struct spi_nor *nor)
{
struct dentry *d;
int ret;
if (!rootdir)
rootdir = debugfs_create_dir(SPI_NOR_DEBUGFS_ROOT, NULL);
ret = devm_add_action(nor->dev, spi_nor_debugfs_unregister, nor);
if (ret)
return;
d = debugfs_create_dir(dev_name(nor->dev), rootdir);
nor->debugfs_root = d;
debugfs_create_file("params", 0444, d, nor, &spi_nor_params_fops);
debugfs_create_file("capabilities", 0444, d, nor,
&spi_nor_capabilities_fops);
}
void spi_nor_debugfs_shutdown(void)
{
debugfs_remove(rootdir);
}
