This adds support for the Lynx 10G SerDes found on the QorIQ T-series and Layerscape series. Due to limited time and hardware, only support for the LS1046ARDB is added in this initial series. There is a sketch for LS1088ARDB support, but it is incomplete. Dynamic reconfiguration does not work. That is, the configuration must match what is set in the RCW. From my testing, SerDes register settings appear identical. The issue appears to be between the PCS and the MAC. The link itself comes up at both ends, and a mac loopback succeeds. However, a PCS loopback results in dropped packets. Perhaps there is some undocumented register in the PCS? I suspect this driver is around 95% complete, but, unfortunately, I no longer have time to investigate this further. At the very least it is useful for two cases: - Although this is untested, it should support 2.5G SGMII as well as 1000BASE-KX. The latter needs MAC and PCS support, but the former should work out of the box. - It allows for clock configurations not supported by the RCW. This is very useful if you want to use e.g. SRDS_PRTCL_S1=0x3333 and =0x1133 on the same board. This is because the former setting will use PLL1 as the 1G reference, but the latter will use PLL1 as the 10G reference. Because we can reconfigure the PLLs, it is possible to always use PLL1 as the 1G reference. Changes in v7: - Use double quotes everywhere in yaml - Break out call order into generic documentation - Refuse to switch "major" protocols - Update Kconfig to reflect restrictions - Remove set/clear of "pcs reset" bit, since it doesn't seem to fix anything. Changes in v6: - Bump PHY_TYPE_2500BASEX to 13, since PHY_TYPE_USXGMII was added in the meantime - fsl,type -> phy-type - frequence -> frequency - Update MAINTAINERS to include new files - Include bitfield.h and slab.h to allow compilation on non-arm64 arches. - Depend on COMMON_CLK and either layerscape/ppc - XGI.9 -> XFI.9 Changes in v5: - Update commit description - Dual id header - Remove references to PHY_INTERFACE_MODE_1000BASEKX to allow this series to be applied directly to linux/master. - Add fsl,lynx-10g.h to MAINTAINERS Changes in v4: - Add 2500BASE-X and 10GBASE-R phy types - Use subnodes to describe lane configuration, instead of describing PCCRs. This is the same style used by phy-cadence-sierra et al. - Add ids for Lynx 10g PLLs - Rework all debug statements to remove use of __func__. Additional information has been provided as necessary. - Consider alternative parent rates in round_rate and not in set_rate. Trying to modify out parent's rate in set_rate will deadlock. - Explicitly perform a stop/reset sequence in set_rate. This way we always ensure that the PLL is properly stopped. - Set the power-down bit when disabling the PLL. We can do this now that enable/disable aren't abused during the set rate sequence. - Fix typos in QSGMII_OFFSET and XFI_OFFSET - Rename LNmTECR0_TEQ_TYPE_PRE to LNmTECR0_TEQ_TYPE_POST to better reflect its function (adding post-cursor equalization). - Use of_clk_hw_onecell_get instead of a custom function. - Return struct clks from lynx_clks_init instead of embedding lynx_clk in lynx_priv. - Rework PCCR helper functions; T-series SoCs differ from Layerscape SoCs primarily in the layout and offset of the PCCRs. This will help bring a cleaner abstraction layer. The caps have been removed, since this handles the only current usage. - Convert to use new binding format. As a result of this, we no longer need to have protocols for PCIe or SATA. Additionally, modes now live in lynx_group instead of lynx_priv. - Remove teq from lynx_proto_params, since it can be determined from preq_ratio/postq_ratio. - Fix an early return from lynx_set_mode not releasing serdes->lock. - Rename lynx_priv.conf to .cfg, since I kept mistyping it. Changes in v3: - Manually expand yaml references - Add mode configuration to device tree - Rename remaining references to QorIQ SerDes to Lynx 10G - Fix PLL enable sequence by waiting for our reset request to be cleared before continuing. Do the same for the lock, even though it isn't as critical. Because we will delay for 1.5ms on average, use prepare instead of enable so we can sleep. - Document the status of each protocol - Fix offset of several bitfields in RECR0 - Take into account PLLRST_B, SDRST_B, and SDEN when considering whether a PLL is "enabled." - Only power off unused lanes. - Split mode lane mask into first/last lane (like group) - Read modes from device tree - Use caps to determine whether KX/KR are supported - Move modes to lynx_priv - Ensure that the protocol controller is not already in-use when we try to configure a new mode. This should only occur if the device tree is misconfigured (e.g. when QSGMII is selected on two lanes but there is only one QSGMII controller). - Split PLL drivers off into their own file - Add clock for "ext_dly" instead of writing the bit directly (and racing with any clock code). - Use kasprintf instead of open-coding the snprintf dance - Support 1000BASE-KX in lynx_lookup_proto. This still requires PCS support, so nothing is truly "enabled" yet. - Describe modes in device tree - ls1088a: Add serdes bindings Changes in v2: - Rename to fsl,lynx-10g.yaml - Refer to the device in the documentation, rather than the binding - Move compatible first - Document phy cells in the description - Allow a value of 1 for phy-cells. This allows for compatibility with the similar (but according to Ioana Ciornei different enough) lynx-28g binding. - Remove minItems - Use list for clock-names - Fix example binding having too many cells in regs - Add #clock-cells. This will allow using assigned-clocks* to configure the PLLs. - Document the structure of the compatible strings - Rename driver to Lynx 10G (etc.) - Fix not clearing group->pll after disabling it - Support 1 and 2 phy-cells - Power off lanes during probe - Clear SGMIIaCR1_PCS_EN during probe - Rename LYNX_PROTO_UNKNOWN to LYNX_PROTO_NONE - Handle 1000BASE-KX in lynx_proto_mode_prep - Use one phy cell for SerDes1, since no lanes can be grouped - Disable SerDes by default to prevent breaking boards inadvertently. Sean Anderson (8): dt-bindings: phy: Add 2500BASE-X and 10GBASE-R dt-bindings: phy: Add Lynx 10G phy binding dt-bindings: clock: Add ids for Lynx 10g PLLs phy: fsl: Add Lynx 10G SerDes driver arm64: dts: ls1046a: Add serdes bindings arm64: dts: ls1088a: Add serdes bindings arm64: dts: ls1046ardb: Add serdes bindings [WIP] arm64: dts: ls1088ardb: Add serdes bindings .../devicetree/bindings/phy/fsl,lynx-10g.yaml | 236 ++++ Documentation/driver-api/phy/index.rst | 1 + Documentation/driver-api/phy/lynx_10g.rst | 58 + MAINTAINERS | 7 + .../boot/dts/freescale/fsl-ls1046a-rdb.dts | 112 ++ .../arm64/boot/dts/freescale/fsl-ls1046a.dtsi | 18 + .../boot/dts/freescale/fsl-ls1088a-rdb.dts | 161 +++ .../arm64/boot/dts/freescale/fsl-ls1088a.dtsi | 18 + drivers/phy/freescale/Kconfig | 23 + drivers/phy/freescale/Makefile | 3 + drivers/phy/freescale/lynx-10g.h | 16 + drivers/phy/freescale/phy-fsl-lynx-10g-clk.c | 503 +++++++ drivers/phy/freescale/phy-fsl-lynx-10g.c | 1167 +++++++++++++++++ include/dt-bindings/clock/fsl,lynx-10g.h | 14 + include/dt-bindings/phy/phy.h | 2 + 15 files changed, 2339 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/fsl,lynx-10g.yaml create mode 100644 Documentation/driver-api/phy/lynx_10g.rst create mode 100644 drivers/phy/freescale/lynx-10g.h create mode 100644 drivers/phy/freescale/phy-fsl-lynx-10g-clk.c create mode 100644 drivers/phy/freescale/phy-fsl-lynx-10g.c create mode 100644 include/dt-bindings/clock/fsl,lynx-10g.h -- 2.35.1.1320.gc452695387.dirty
