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m25p80: Add support for SST READ ID 0x90/0xAB commands 

Add support for SST READ ID 0x90/0xAB commands for reading out the flash
manufacturer ID and device ID.

Signed-off-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20171126231634.9531-3-frasse.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Francisco Iglesias 2017-12-13 17:59:21 +00:00 committed by Peter Maydell
parent 0add925f7c
commit a87fc364f9
1 changed files with 32 additions and 0 deletions
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32
hw/block/m25p80.c
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@ -355,6 +355,8 @@ typedef enum {
DPP = 0xa2,
QPP = 0x32,
QPP_4 = 0x34,
RDID_90 = 0x90,
RDID_AB = 0xab,
ERASE_4K = 0x20,
ERASE4_4K = 0x21,
@ -405,6 +407,7 @@ typedef enum {
MAN_MACRONIX,
MAN_NUMONYX,
MAN_WINBOND,
MAN_SST,
MAN_GENERIC,
} Manufacturer;
@ -476,6 +479,8 @@ static inline Manufacturer get_man(Flash *s)
return MAN_SPANSION;
case 0xC2:
return MAN_MACRONIX;
case 0xBF:
return MAN_SST;
default:
return MAN_GENERIC;
}
@ -711,6 +716,31 @@ static void complete_collecting_data(Flash *s)
case WEVCR:
s->enh_volatile_cfg = s->data[0];
break;
case RDID_90:
case RDID_AB:
if (get_man(s) == MAN_SST) {
if (s->cur_addr <= 1) {
if (s->cur_addr) {
s->data[0] = s->pi->id[2];
s->data[1] = s->pi->id[0];
} else {
s->data[0] = s->pi->id[0];
s->data[1] = s->pi->id[2];
}
s->pos = 0;
s->len = 2;
s->data_read_loop = true;
s->state = STATE_READING_DATA;
} else {
qemu_log_mask(LOG_GUEST_ERROR,
"M25P80: Invalid read id address\n");
}
} else {
qemu_log_mask(LOG_GUEST_ERROR,
"M25P80: Read id (command 0x90/0xAB) is not supported"
" by device\n");
}
break;
default:
break;
}
@ -926,6 +956,8 @@ static void decode_new_cmd(Flash *s, uint32_t value)
case PP4:
case PP4_4:
case DIE_ERASE:
case RDID_90:
case RDID_AB:
s->needed_bytes = get_addr_length(s);
s->pos = 0;
s->len = 0;