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Message-ID: <20240730193635.GA2017245-robh@kernel.org>
Date: Tue, 30 Jul 2024 13:36:35 -0600
From: Rob Herring <robh@...nel.org>
To: Herve Codina <herve.codina@...tlin.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Qiang Zhao <qiang.zhao@....com>,
Li Yang <leoyang.li@....com>, Mark Brown <broonie@...nel.org>,
linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v1 23/36] dt-bindings: soc: fsl: cpm_qe: Add QUICC Engine
(QE) QMC controller
On Mon, Jul 29, 2024 at 04:20:52PM +0200, Herve Codina wrote:
> Add support for the QMC (QUICC Multichannel Controller) available in
> some PowerQUICC SoC that uses a QUICC Engine (QE) block such as MPC8321.
>
> This QE QMC is similar to the CPM QMC except that it uses UCCs (Unified
> Communication Controllers) instead of SCCs (Serial Communication
> Controllers). Also, compared against the CPM QMC, this QE QMC does not
> use a fixed area for the UCC/SCC parameters area but it uses a dynamic
> area allocated and provided to the hardware at runtime.
> Last point, the QE QMC can use a firmware to have the QMC working in
> 'soft-qmc' mode.
>
> Signed-off-by: Herve Codina <herve.codina@...tlin.com>
> ---
> .../soc/fsl/cpm_qe/fsl,qe-ucc-qmc.yaml | 197 ++++++++++++++++++
> 1 file changed, 197 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qe-ucc-qmc.yaml
>
> diff --git a/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qe-ucc-qmc.yaml b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qe-ucc-qmc.yaml
> new file mode 100644
> index 000000000000..1215b2de36e6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/fsl,qe-ucc-qmc.yaml
> @@ -0,0 +1,197 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/fsl/cpm_qe/fsl,qe-ucc-qmc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: PowerQUICC QE QUICC Multichannel Controller (QMC)
> +
> +maintainers:
> + - Herve Codina <herve.codina@...tlin.com>
> +
> +description:
> + The QMC (QUICC Multichannel Controller) emulates up to 64 channels within one
> + serial controller using the same TDM physical interface routed from TSA.
> +
> +properties:
> + compatible:
> + items:
> + - enum:
> + - fsl,mpc8321-ucc-qmc
> + - const: fsl,qe-ucc-qmc
> +
> + reg:
> + items:
> + - description: UCC (Unified communication controller) register base
> + - description: Dual port ram base
> +
> + reg-names:
> + items:
> + - const: ucc_regs
> + - const: dpram
> +
> + interrupts:
> + maxItems: 1
> + description: UCC interrupt line in the QE interrupt controller
> +
> + fsl,tsa-serial:
> + $ref: /schemas/types.yaml#/definitions/phandle-array
> + items:
> + - items:
> + - description: phandle to TSA node
> + - enum: [1, 2, 3, 4, 5]
> + description: |
> + TSA serial interface (dt-bindings/soc/qe-fsl,tsa.h defines these
> + values)
> + - 1: UCC1
> + - 2: UCC2
> + - 3: UCC3
> + - 4: UCC4
> + - 5: UCC5
> + description:
> + Should be a phandle/number pair. The phandle to TSA node and the TSA
> + serial interface to use.
> +
> + fsl,soft-qmc:
> + $ref: /schemas/types.yaml#/definitions/string
> + description:
> + Soft QMC firmware name to load. If this property is omitted, no firmware
> + are used.
> +
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> +patternProperties:
> + '^channel@([0-9]|[1-5][0-9]|6[0-3])$':
Unit-addresses are typically in hex.
> + description:
> + A channel managed by this controller
> + type: object
> + additionalProperties: false
> +
> + properties:
> + reg:
> + minimum: 0
> + maximum: 63
> + description:
> + The channel number
> +
> + fsl,operational-mode:
> + $ref: /schemas/types.yaml#/definitions/string
> + enum: [transparent, hdlc]
> + default: transparent
> + description: |
> + The channel operational mode
> + - hdlc: The channel handles HDLC frames
> + - transparent: The channel handles raw data without any processing
> +
> + fsl,reverse-data:
> + $ref: /schemas/types.yaml#/definitions/flag
> + description:
> + The bit order as seen on the channels is reversed,
> + transmitting/receiving the MSB of each octet first.
> + This flag is used only in 'transparent' mode.
> +
> + fsl,tx-ts-mask:
> + $ref: /schemas/types.yaml#/definitions/uint64
> + description:
> + Channel assigned Tx time-slots within the Tx time-slots routed by the
> + TSA to this cell.
> +
> + fsl,rx-ts-mask:
> + $ref: /schemas/types.yaml#/definitions/uint64
> + description:
> + Channel assigned Rx time-slots within the Rx time-slots routed by the
> + TSA to this cell.
> +
> + compatible:
compatible goes first in the list.
> + items:
> + - enum:
> + - fsl,mpc8321-ucc-qmc-hdlc
> + - const: fsl,qe-ucc-qmc-hdlc
> + - const: fsl,qmc-hdlc
Really need 3 compatibles?
> +
> + fsl,framer:
> + $ref: /schemas/types.yaml#/definitions/phandle
> + description:
> + phandle to the framer node. The framer is in charge of an E1/T1 line
> + interface connected to the TDM bus. It can be used to get the E1/T1 line
> + status such as link up/down.
> +
> + allOf:
> + - if:
> + properties:
> + compatible:
> + not:
> + contains:
> + const: fsl,qmc-hdlc
> + then:
> + properties:
> + fsl,framer: false
> +
> + required:
> + - reg
> + - fsl,tx-ts-mask
> + - fsl,rx-ts-mask
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> + - interrupts
> + - fsl,tsa-serial
> + - '#address-cells'
> + - '#size-cells'
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/soc/qe-fsl,tsa.h>
> +
> + qmc@a60 {
> + compatible = "fsl,mpc8321-ucc-qmc", "fsl,qe-ucc-qmc";
> + reg = <0x3200 0x200>,
> + <0x10000 0x1000>;
> + reg-names = "ucc_regs", "dpram";
> + interrupts = <35>;
> + interrupt-parent = <&qeic>;
> + fsl,soft-qmc = "fsl_qe_ucode_qmc_8321_11.bin";
> +
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + fsl,tsa-serial = <&tsa FSL_QE_TSA_UCC4>;
> +
> + channel@16 {
> + /* Ch16 : First 4 even TS from all routed from TSA */
> + reg = <16>;
> + fsl,operational-mode = "transparent";
> + fsl,reverse-data;
> + fsl,tx-ts-mask = <0x00000000 0x000000aa>;
> + fsl,rx-ts-mask = <0x00000000 0x000000aa>;
> + };
> +
> + channel@17 {
> + /* Ch17 : First 4 odd TS from all routed from TSA */
> + reg = <17>;
> + fsl,operational-mode = "transparent";
> + fsl,reverse-data;
> + fsl,tx-ts-mask = <0x00000000 0x00000055>;
> + fsl,rx-ts-mask = <0x00000000 0x00000055>;
> + };
> +
> + channel@19 {
> + /* Ch19 : 8 TS (TS 8..15) from all routed from TSA */
> + compatible = "fsl,mpc8321-ucc-qmc-hdlc",
> + "fsl,qe-ucc-qmc-hdlc",
> + "fsl,qmc-hdlc";
> + reg = <19>;
> + fsl,operational-mode = "hdlc";
> + fsl,tx-ts-mask = <0x00000000 0x0000ff00>;
> + fsl,rx-ts-mask = <0x00000000 0x0000ff00>;
> + fsl,framer = <&framer>;
> + };
> + };
> --
> 2.45.0
>
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