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[PULL 05/19] hw/block: m25p80: Add ISSI SPI flash support
From: |
Alistair Francis |
Subject: |
[PULL 05/19] hw/block: m25p80: Add ISSI SPI flash support |
Date: |
Wed, 17 Feb 2021 17:59:20 -0800 |
From: Bin Meng <bin.meng@windriver.com>
This adds the ISSI SPI flash support. The number of dummy cycles in
fast read, fast read dual output and fast read quad output commands
is currently using the default 8. Likewise, the same default value
is used for fast read dual/quad I/O command. Per the datasheet [1],
the number of dummy cycles is configurable, but this is not modeled
at present.
For flash whose size is larger than 16 MiB, the sequence of 3-byte
address along with EXTADD bit in the bank address register (BAR) is
not supported. We assume that guest software always uses op codes
with 4-byte address sequence. Fortunately, this is the case for both
U-Boot and Linux spi-nor drivers.
QPI (Quad Peripheral Interface) that supports 2-cycle instruction
has different default values for dummy cycles of fast read family
commands, and is unsupported at the time being.
[1] http://www.issi.com/WW/pdf/25LP-WP256.pdf
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20210126060007.12904-2-bmeng.cn@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
hw/block/m25p80.c | 44 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 43 insertions(+), 1 deletion(-)
diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c
index 0412d3e7f4..ad4456b74e 100644
--- a/hw/block/m25p80.c
+++ b/hw/block/m25p80.c
@@ -412,6 +412,7 @@ typedef enum {
MAN_NUMONYX,
MAN_WINBOND,
MAN_SST,
+ MAN_ISSI,
MAN_GENERIC,
} Manufacturer;
@@ -487,6 +488,8 @@ static inline Manufacturer get_man(Flash *s)
return MAN_MACRONIX;
case 0xBF:
return MAN_SST;
+ case 0x9D:
+ return MAN_ISSI;
default:
return MAN_GENERIC;
}
@@ -706,6 +709,9 @@ static void complete_collecting_data(Flash *s)
case MAN_SPANSION:
s->quad_enable = !!(s->data[1] & 0x02);
break;
+ case MAN_ISSI:
+ s->quad_enable = extract32(s->data[0], 6, 1);
+ break;
case MAN_MACRONIX:
s->quad_enable = extract32(s->data[0], 6, 1);
if (s->len > 1) {
@@ -895,6 +901,19 @@ static void decode_fast_read_cmd(Flash *s)
SPANSION_DUMMY_CLK_LEN
);
break;
+ case MAN_ISSI:
+ /*
+ * The Fast Read instruction code is followed by address bytes and
+ * dummy cycles, transmitted via the SI line.
+ *
+ * The number of dummy cycles is configurable but this is currently
+ * unmodeled, hence the default value 8 is used.
+ *
+ * QPI (Quad Peripheral Interface) mode has different default value
+ * of dummy cycles, but this is unsupported at the time being.
+ */
+ s->needed_bytes += 1;
+ break;
default:
break;
}
@@ -934,6 +953,16 @@ static void decode_dio_read_cmd(Flash *s)
break;
}
break;
+ case MAN_ISSI:
+ /*
+ * The Fast Read Dual I/O instruction code is followed by address bytes
+ * and dummy cycles, transmitted via the IO1 and IO0 line.
+ *
+ * The number of dummy cycles is configurable but this is currently
+ * unmodeled, hence the default value 4 is used.
+ */
+ s->needed_bytes += 1;
+ break;
default:
break;
}
@@ -974,6 +1003,19 @@ static void decode_qio_read_cmd(Flash *s)
break;
}
break;
+ case MAN_ISSI:
+ /*
+ * The Fast Read Quad I/O instruction code is followed by address bytes
+ * and dummy cycles, transmitted via the IO3, IO2, IO1 and IO0 line.
+ *
+ * The number of dummy cycles is configurable but this is currently
+ * unmodeled, hence the default value 6 is used.
+ *
+ * QPI (Quad Peripheral Interface) mode has different default value
+ * of dummy cycles, but this is unsupported at the time being.
+ */
+ s->needed_bytes += 3;
+ break;
default:
break;
}
@@ -1132,7 +1174,7 @@ static void decode_new_cmd(Flash *s, uint32_t value)
case RDSR:
s->data[0] = (!!s->write_enable) << 1;
- if (get_man(s) == MAN_MACRONIX) {
+ if (get_man(s) == MAN_MACRONIX || get_man(s) == MAN_ISSI) {
s->data[0] |= (!!s->quad_enable) << 6;
}
if (get_man(s) == MAN_SST) {
--
2.30.0
- [PULL 00/19] riscv-to-apply queue, Alistair Francis, 2021/02/17
- [PULL 01/19] target/riscv: Declare csr_ops[] with a known size, Alistair Francis, 2021/02/17
- [PULL 02/19] hw/misc: sifive_u_otp: Use error_report() when block operation fails, Alistair Francis, 2021/02/17
- [PULL 05/19] hw/block: m25p80: Add ISSI SPI flash support,
Alistair Francis <=
- [PULL 04/19] target-riscv: support QMP dump-guest-memory, Alistair Francis, 2021/02/17
- [PULL 07/19] hw/ssi: Add SiFive SPI controller support, Alistair Francis, 2021/02/17
- [PULL 06/19] hw/block: m25p80: Add various ISSI flash information, Alistair Francis, 2021/02/17
- [PULL 03/19] roms/opensbi: Upgrade from v0.8 to v0.9, Alistair Francis, 2021/02/17
- [PULL 08/19] hw/riscv: sifive_u: Add QSPI0 controller and connect a flash, Alistair Francis, 2021/02/17
- [PULL 09/19] hw/riscv: sifive_u: Add QSPI2 controller and connect an SD card, Alistair Francis, 2021/02/17
- [PULL 10/19] hw/riscv: sifive_u: Change SIFIVE_U_GEM_IRQ to decimal value, Alistair Francis, 2021/02/17
- [PULL 11/19] docs/system: Sort targets in alphabetical order, Alistair Francis, 2021/02/17
- [PULL 13/19] docs/system: riscv: Add documentation for sifive_u machine, Alistair Francis, 2021/02/17
- [PULL 12/19] docs/system: Add RISC-V documentation, Alistair Francis, 2021/02/17