michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: memc: smartbond: Add support for the memory driver class.

Browse source 
Add support for the memory controller by utilizing QSPIC2. The latter is
capable to drive both NOR and PSRAM memory devices. For this to work,
the RAM driving mode is enabled.

Signed-off-by: Ioannis Karachalios <ioannis.karachalios.px@renesas.com>
This commit is contained in:
Ioannis Karachalios 2024-01-23 22:13:59 +02:00 • committed by Anas Nashif
commit 02e739873e
5 changed files with 529 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

260
dts/bindings/memory-controllers/renesas,smartbond-nor-psram.yaml Normal file
View file

@ -0,0 +1,260 @@
# Copyright (c) 2023 Renesas Electronics Corporation
# SPDX-License-Identifier: Apache-2.0
description: Renesas Smartbond(tm) NOR/PSRAM controller
include: base.yaml
compatible: "renesas,smartbond-nor-psram"
properties:
reg:
required: true
is-ram:
type: boolean
description: |
If present, the memory controller will be configured to drive PSRAM devices.
dev-size:
type: int
required: true
description: |
Memory size/capacity in bits.
dev-type:
type: int
required: true
description: |
Device type, part of device ID, used to verify the memory device used.
dev-density:
type: int
required: true
description: |
Device density, part of device ID, used to verify the memory device used.
[7:0] should reflect the density value itself and [15:8] should reflect
the mask that should be applied to the returned device ID value.
This is because part of its byte value might contain invalid bits.
dev-id:
type: int
required: true
description: |
Manufacturer ID, part of device ID, used to verify the memory device used.
reset-delay-us:
type: int
required: true
description: |
Time in microseconds (us) the memory device can accept the next command following a SW reset.
read-cs-idle-min-ns:
type: int
required: true
description: |
Min. time, in nanoseconds, the #CS line should remain inactive between
the transmission of two different instructions.
erase-cs-idle-min-ns:
type: int
description: |
Min. time, in nanoseconds, the #CS line should remain inactive after the execution
of a write enable, erase, erase suspend or erase resume instruction. This setting
is not used if is-ram property is present.
enter-qpi-cmd:
type: int
description: |
Command to enter the QPI mode supported by a memory device
(should be transmitted in single bus mode).
exit-qpi-cmd:
type: int
description: |
Command to exit the QPI mode supported by a memory device
(should be transmitted in quad bus mode).
enter-qpi-mode:
type: boolean
description: |
If present, the memory device will enter the QPI mode which typically reflects that
all bytes be sent in quad bus mode. It's a pre-requisite that read and write
commands, that should be read-cmd and write-cmd respectively, reflect the QPI mode.
read-cmd:
type: int
default: 0x03
description: |
Read command for single/burst read accesses in auto mode. Default value is the opcode
for single mode which is supported by all memory devices.
write-cmd:
type: int
default: 0x02
description: |
Write command for single/burst write accesses in auto mode. Default value is the opcode
for single mode which is supported by all memory devices.
clock-mode:
type: string
enum:
- "spi-mode0"
- "spi-mode3"
default: "spi-mode0"
description: |
Clock mode when #CS is idle/inactive
- Mode0: #CLK is low when #CS is inactive
- Mode3: #CLK is high when #CS is inactive
Mode0 is selected by default as it should be supported by all memory devices.
addr-range:
type: string
enum:
- "addr-range-24bit"
- "addr-range-32bit"
default: "addr-range-24bit"
description: |
Address size to use in auto mode. In 24-bit mode up to 16MB can be
accessed whilst in 32-bit mode up to 32MB can be accessed which is
the max. address space supported by QSPICx. Default value is 24-bit
mode which is supported by all memory devices.
clock-div:
type: int
description: |
Clock divider for QSPIC2 controller. The clock path of
this block is always DIV1 which reflects the current
system clock.
tcem-max-us:
type: int
description: |
If a non zero value is applied, then Tcem should be taken into
consideration by QSPIC2 so that it can split a burst read/write
access in case the total time exceeds the defined value
(at the cost of extra cycles required for re-sending the instruction,
address and dummy bytes, if any). This setting is meaningful only if
is-ram is present. This value reflects the max. time in microseconds
the #CS line can be driven low in a write/read burst access
(required for the auto-refresh mechanism, when supported).
dummy-bytes-count:
type: string
required: true
enum:
- "dummy-bytes-count0"
- "dummy-bytes-count1"
- "dummy-bytes-count2"
- "dummy-bytes-count4"
description: |
Number of dummy bytes to send for single/burst read access in auto mode.
extra-byte-enable:
type: boolean
description: |
If present, the extra byte will be sent after the dummy bytes, if any.
This should be useful if 3 dummy bytes are required. In such a case,
dummy-bytes-count should be set to 2.
extra-byte:
type: int
description: |
Extra byte to be sent, if extra-byte-enable is present.
rx-addr-mode:
type: string
enum:
- "single-spi"
- "dual-spi"
- "quad-spi"
default: "single-spi"
description: |
Describes the mode of SPI bus during the address phase for single/burst
read accesses in auto mode. Default value is single mode which should be
supported by all memory devices.
rx-inst-mode:
type: string
enum:
- "single-spi"
- "dual-spi"
- "quad-spi"
default: "single-spi"
description: |
Describes the mode of SPI bus during the instruction phase for single/burst
read accesses in auto mode. Default value is single mode which should be
supported by all memory devices.
rx-data-mode:
type: string
enum:
- "single-spi"
- "dual-spi"
- "quad-spi"
default: "single-spi"
description: |
Describes the mode of SPI bus during the data phase for single/burst
read accesses in auto mode. Default value is single mode which should
be supported by all memory devices.
rx-dummy-mode:
type: string
enum:
- "single-spi"
- "dual-spi"
- "quad-spi"
default: "single-spi"
description: |
Describes the mode of SPI bus during the dummy bytes phase for single/burst
read accesses in auto mode. The single mode should be supported by all
memory devices.
rx-extra-mode:
type: string
enum:
- "single-spi"
- "dual-spi"
- "quad-spi"
description: |
Describes the mode of SPI bus during the extra byte phase for single/burst
read accesses in auto mode. Default value is single mode which should be
supported by all memory devices.
tx-addr-mode:
type: string
enum:
- "single-spi"
- "dual-spi"
- "quad-spi"
default: "single-spi"
description: |
Describes the mode of SPI bus during the address phase for single/burst
write accesses in auto mode. Default value is single mode which should
be supported by all memory devices.
tx-inst-mode:
type: string
enum:
- "single-spi"
- "dual-spi"
- "quad-spi"
default: "single-spi"
description: |
Describes the mode of SPI bus during the instruction phase for single/burst
write accesses in auto mode. The single mode should be supported by all
memory devices.
tx-data-mode:
type: string
enum:
- "single-spi"
- "dual-spi"
- "quad-spi"
default: "single-spi"
description: |
Describes the mode of SPI bus during the data phase for single/burst
write accesses in auto mode. Default value is single mode which should
be supported by all memory devices.