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author | Francisco Iglesias <frasse.iglesias@gmail.com> | 2017-12-13 17:59:20 +0000 |
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committer | Peter Maydell <peter.maydell@linaro.org> | 2017-12-13 17:59:20 +0000 |
commit | 0add925f7c3188a5e020e223dbb45fb24e093a24 (patch) | |
tree | 00141270493edf07d38b4a9683afab3ee9d8ef74 /hw/block | |
parent | 0a0dc59d27527b78a195c2d838d28b7b49e5a639 (diff) | |
download | qemu-0add925f7c3188a5e020e223dbb45fb24e093a24.zip qemu-0add925f7c3188a5e020e223dbb45fb24e093a24.tar.gz qemu-0add925f7c3188a5e020e223dbb45fb24e093a24.tar.bz2 |
m25p80: Add support for continuous read out of RDSR and READ_FSR
Add support for continuous read out of the RDSR and READ_FSR status
registers until the chip select is deasserted. This feature is supported
by amongst others 1 or more flashtypes manufactured by Numonyx (Micron),
Windbond, SST, Gigadevice, Eon and Macronix.
Signed-off-by: Francisco Iglesias <frasse.iglesias@gmail.com>
Acked-by: Marcin KrzemiĆski<mar.krzeminski@gmail.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20171126231634.9531-2-frasse.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/block')
-rw-r--r-- | hw/block/m25p80.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index a2438b9..d50acc1 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -423,6 +423,7 @@ typedef struct Flash { uint8_t data[M25P80_INTERNAL_DATA_BUFFER_SZ]; uint32_t len; uint32_t pos; + bool data_read_loop; uint8_t needed_bytes; uint8_t cmd_in_progress; uint32_t cur_addr; @@ -983,6 +984,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) } s->pos = 0; s->len = 1; + s->data_read_loop = true; s->state = STATE_READING_DATA; break; @@ -993,6 +995,7 @@ static void decode_new_cmd(Flash *s, uint32_t value) } s->pos = 0; s->len = 1; + s->data_read_loop = true; s->state = STATE_READING_DATA; break; @@ -1133,6 +1136,7 @@ static int m25p80_cs(SSISlave *ss, bool select) s->pos = 0; s->state = STATE_IDLE; flash_sync_dirty(s, -1); + s->data_read_loop = false; } DB_PRINT_L(0, "%sselect\n", select ? "de" : ""); @@ -1198,7 +1202,9 @@ static uint32_t m25p80_transfer8(SSISlave *ss, uint32_t tx) s->pos++; if (s->pos == s->len) { s->pos = 0; - s->state = STATE_IDLE; + if (!s->data_read_loop) { + s->state = STATE_IDLE; + } } break; @@ -1269,11 +1275,38 @@ static Property m25p80_properties[] = { DEFINE_PROP_END_OF_LIST(), }; +static int m25p80_pre_load(void *opaque) +{ + Flash *s = (Flash *)opaque; + + s->data_read_loop = false; + return 0; +} + +static bool m25p80_data_read_loop_needed(void *opaque) +{ + Flash *s = (Flash *)opaque; + + return s->data_read_loop; +} + +static const VMStateDescription vmstate_m25p80_data_read_loop = { + .name = "m25p80/data_read_loop", + .version_id = 1, + .minimum_version_id = 1, + .needed = m25p80_data_read_loop_needed, + .fields = (VMStateField[]) { + VMSTATE_BOOL(data_read_loop, Flash), + VMSTATE_END_OF_LIST() + } +}; + static const VMStateDescription vmstate_m25p80 = { .name = "m25p80", .version_id = 0, .minimum_version_id = 0, .pre_save = m25p80_pre_save, + .pre_load = m25p80_pre_load, .fields = (VMStateField[]) { VMSTATE_UINT8(state, Flash), VMSTATE_UINT8_ARRAY(data, Flash, M25P80_INTERNAL_DATA_BUFFER_SZ), @@ -1295,6 +1328,10 @@ static const VMStateDescription vmstate_m25p80 = { VMSTATE_UINT8(spansion_cr3nv, Flash), VMSTATE_UINT8(spansion_cr4nv, Flash), VMSTATE_END_OF_LIST() + }, + .subsections = (const VMStateDescription * []) { + &vmstate_m25p80_data_read_loop, + NULL } }; |