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249 lines
6.9 KiB
249 lines
6.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/mtd/spi-nor.h> |
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#include <linux/spi/spi.h> |
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#include <linux/spi/spi-mem.h> |
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#include <linux/debugfs.h> |
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#include "core.h" |
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#define SPI_NOR_DEBUGFS_ROOT "spi-nor" |
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#define SNOR_F_NAME(name) [ilog2(SNOR_F_##name)] = #name |
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static const char *const snor_f_names[] = { |
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SNOR_F_NAME(HAS_SR_TB), |
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SNOR_F_NAME(NO_OP_CHIP_ERASE), |
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SNOR_F_NAME(BROKEN_RESET), |
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SNOR_F_NAME(4B_OPCODES), |
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SNOR_F_NAME(HAS_4BAIT), |
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SNOR_F_NAME(HAS_LOCK), |
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SNOR_F_NAME(HAS_16BIT_SR), |
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SNOR_F_NAME(NO_READ_CR), |
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SNOR_F_NAME(HAS_SR_TB_BIT6), |
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SNOR_F_NAME(HAS_4BIT_BP), |
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SNOR_F_NAME(HAS_SR_BP3_BIT6), |
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SNOR_F_NAME(IO_MODE_EN_VOLATILE), |
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SNOR_F_NAME(SOFT_RESET), |
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SNOR_F_NAME(SWP_IS_VOLATILE), |
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}; |
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#undef SNOR_F_NAME |
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static const char *spi_nor_protocol_name(enum spi_nor_protocol proto) |
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{ |
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switch (proto) { |
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case SNOR_PROTO_1_1_1: return "1S-1S-1S"; |
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case SNOR_PROTO_1_1_2: return "1S-1S-2S"; |
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case SNOR_PROTO_1_1_4: return "1S-1S-4S"; |
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case SNOR_PROTO_1_1_8: return "1S-1S-8S"; |
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case SNOR_PROTO_1_2_2: return "1S-2S-2S"; |
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case SNOR_PROTO_1_4_4: return "1S-4S-4S"; |
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case SNOR_PROTO_1_8_8: return "1S-8S-8S"; |
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case SNOR_PROTO_2_2_2: return "2S-2S-2S"; |
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case SNOR_PROTO_4_4_4: return "4S-4S-4S"; |
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case SNOR_PROTO_8_8_8: return "8S-8S-8S"; |
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case SNOR_PROTO_1_1_1_DTR: return "1D-1D-1D"; |
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case SNOR_PROTO_1_2_2_DTR: return "1D-2D-2D"; |
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case SNOR_PROTO_1_4_4_DTR: return "1D-4D-4D"; |
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case SNOR_PROTO_1_8_8_DTR: return "1D-8D-8D"; |
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case SNOR_PROTO_8_8_8_DTR: return "8D-8D-8D"; |
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} |
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return "<unknown>"; |
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} |
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static void spi_nor_print_flags(struct seq_file *s, unsigned long flags, |
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const char *const *names, int names_len) |
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{ |
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bool sep = false; |
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int i; |
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for (i = 0; i < sizeof(flags) * BITS_PER_BYTE; i++) { |
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if (!(flags & BIT(i))) |
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continue; |
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if (sep) |
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seq_puts(s, " | "); |
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sep = true; |
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if (i < names_len && names[i]) |
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seq_puts(s, names[i]); |
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else |
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seq_printf(s, "1<<%d", i); |
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} |
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} |
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static int spi_nor_params_show(struct seq_file *s, void *data) |
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{ |
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struct spi_nor *nor = s->private; |
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struct spi_nor_flash_parameter *params = nor->params; |
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struct spi_nor_erase_map *erase_map = ¶ms->erase_map; |
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struct spi_nor_erase_region *region; |
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const struct flash_info *info = nor->info; |
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char buf[16], *str; |
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int i; |
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seq_printf(s, "name\t\t%s\n", info->name); |
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seq_printf(s, "id\t\t%*ph\n", info->id_len, info->id); |
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string_get_size(params->size, 1, STRING_UNITS_2, buf, sizeof(buf)); |
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seq_printf(s, "size\t\t%s\n", buf); |
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seq_printf(s, "write size\t%u\n", params->writesize); |
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seq_printf(s, "page size\t%u\n", params->page_size); |
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seq_printf(s, "address nbytes\t%u\n", nor->addr_nbytes); |
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seq_puts(s, "flags\t\t"); |
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spi_nor_print_flags(s, nor->flags, snor_f_names, sizeof(snor_f_names)); |
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seq_puts(s, "\n"); |
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seq_puts(s, "\nopcodes\n"); |
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seq_printf(s, " read\t\t0x%02x\n", nor->read_opcode); |
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seq_printf(s, " dummy cycles\t%u\n", nor->read_dummy); |
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seq_printf(s, " erase\t\t0x%02x\n", nor->erase_opcode); |
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seq_printf(s, " program\t0x%02x\n", nor->program_opcode); |
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switch (nor->cmd_ext_type) { |
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case SPI_NOR_EXT_NONE: |
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str = "none"; |
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break; |
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case SPI_NOR_EXT_REPEAT: |
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str = "repeat"; |
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break; |
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case SPI_NOR_EXT_INVERT: |
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str = "invert"; |
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break; |
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default: |
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str = "<unknown>"; |
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break; |
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} |
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seq_printf(s, " 8D extension\t%s\n", str); |
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seq_puts(s, "\nprotocols\n"); |
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seq_printf(s, " read\t\t%s\n", |
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spi_nor_protocol_name(nor->read_proto)); |
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seq_printf(s, " write\t\t%s\n", |
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spi_nor_protocol_name(nor->write_proto)); |
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seq_printf(s, " register\t%s\n", |
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spi_nor_protocol_name(nor->reg_proto)); |
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seq_puts(s, "\nerase commands\n"); |
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for (i = 0; i < SNOR_ERASE_TYPE_MAX; i++) { |
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struct spi_nor_erase_type *et = &erase_map->erase_type[i]; |
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if (et->size) { |
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string_get_size(et->size, 1, STRING_UNITS_2, buf, |
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sizeof(buf)); |
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seq_printf(s, " %02x (%s) [%d]\n", et->opcode, buf, i); |
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} |
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} |
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if (!(nor->flags & SNOR_F_NO_OP_CHIP_ERASE)) { |
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string_get_size(params->size, 1, STRING_UNITS_2, buf, sizeof(buf)); |
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seq_printf(s, " %02x (%s)\n", SPINOR_OP_CHIP_ERASE, buf); |
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} |
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seq_puts(s, "\nsector map\n"); |
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seq_puts(s, " region (in hex) | erase mask | flags\n"); |
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seq_puts(s, " ------------------+------------+----------\n"); |
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for (region = erase_map->regions; |
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region; |
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region = spi_nor_region_next(region)) { |
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u64 start = region->offset & ~SNOR_ERASE_FLAGS_MASK; |
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u64 flags = region->offset & SNOR_ERASE_FLAGS_MASK; |
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u64 end = start + region->size - 1; |
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seq_printf(s, " %08llx-%08llx | [%c%c%c%c] | %s\n", |
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start, end, |
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flags & BIT(0) ? '0' : ' ', |
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flags & BIT(1) ? '1' : ' ', |
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flags & BIT(2) ? '2' : ' ', |
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flags & BIT(3) ? '3' : ' ', |
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flags & SNOR_OVERLAID_REGION ? "overlaid" : ""); |
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} |
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return 0; |
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} |
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DEFINE_SHOW_ATTRIBUTE(spi_nor_params); |
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static void spi_nor_print_read_cmd(struct seq_file *s, u32 cap, |
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struct spi_nor_read_command *cmd) |
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{ |
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seq_printf(s, " %s%s\n", spi_nor_protocol_name(cmd->proto), |
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cap == SNOR_HWCAPS_READ_FAST ? " (fast read)" : ""); |
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seq_printf(s, " opcode\t0x%02x\n", cmd->opcode); |
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seq_printf(s, " mode cycles\t%u\n", cmd->num_mode_clocks); |
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seq_printf(s, " dummy cycles\t%u\n", cmd->num_wait_states); |
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} |
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static void spi_nor_print_pp_cmd(struct seq_file *s, |
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struct spi_nor_pp_command *cmd) |
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{ |
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seq_printf(s, " %s\n", spi_nor_protocol_name(cmd->proto)); |
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seq_printf(s, " opcode\t0x%02x\n", cmd->opcode); |
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} |
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static int spi_nor_capabilities_show(struct seq_file *s, void *data) |
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{ |
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struct spi_nor *nor = s->private; |
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struct spi_nor_flash_parameter *params = nor->params; |
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u32 hwcaps = params->hwcaps.mask; |
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int i, cmd; |
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seq_puts(s, "Supported read modes by the flash\n"); |
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for (i = 0; i < sizeof(hwcaps) * BITS_PER_BYTE; i++) { |
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if (!(hwcaps & BIT(i))) |
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continue; |
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cmd = spi_nor_hwcaps_read2cmd(BIT(i)); |
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if (cmd < 0) |
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continue; |
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spi_nor_print_read_cmd(s, BIT(i), ¶ms->reads[cmd]); |
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hwcaps &= ~BIT(i); |
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} |
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seq_puts(s, "\nSupported page program modes by the flash\n"); |
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for (i = 0; i < sizeof(hwcaps) * BITS_PER_BYTE; i++) { |
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if (!(hwcaps & BIT(i))) |
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continue; |
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cmd = spi_nor_hwcaps_pp2cmd(BIT(i)); |
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if (cmd < 0) |
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continue; |
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spi_nor_print_pp_cmd(s, ¶ms->page_programs[cmd]); |
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hwcaps &= ~BIT(i); |
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} |
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if (hwcaps) |
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seq_printf(s, "\nunknown hwcaps 0x%x\n", hwcaps); |
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return 0; |
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} |
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DEFINE_SHOW_ATTRIBUTE(spi_nor_capabilities); |
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static void spi_nor_debugfs_unregister(void *data) |
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{ |
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struct spi_nor *nor = data; |
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debugfs_remove(nor->debugfs_root); |
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nor->debugfs_root = NULL; |
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} |
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void spi_nor_debugfs_register(struct spi_nor *nor) |
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{ |
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struct dentry *rootdir, *d; |
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int ret; |
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/* Create rootdir once. Will never be deleted again. */ |
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rootdir = debugfs_lookup(SPI_NOR_DEBUGFS_ROOT, NULL); |
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if (!rootdir) |
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rootdir = debugfs_create_dir(SPI_NOR_DEBUGFS_ROOT, NULL); |
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ret = devm_add_action(nor->dev, spi_nor_debugfs_unregister, nor); |
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if (ret) |
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return; |
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d = debugfs_create_dir(dev_name(nor->dev), rootdir); |
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nor->debugfs_root = d; |
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debugfs_create_file("params", 0444, d, nor, &spi_nor_params_fops); |
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debugfs_create_file("capabilities", 0444, d, nor, |
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&spi_nor_capabilities_fops); |
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}
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