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Message-ID: <YW8HIHTCVgB+URJ5@matsya>
Date: Tue, 19 Oct 2021 23:27:52 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Horatiu Vultur <horatiu.vultur@...rochip.com>
Cc: kishon@...com, robh+dt@...nel.org, andrew@...n.ch,
alexandre.belloni@...tlin.com, linux-phy@...ts.infradead.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/3] phy: Add lan966x ethernet serdes PHY driver
On 15-10-21, 14:39, Horatiu Vultur wrote:
> Add the Microchip lan966x ethernet serdes PHY driver for interfaces
> available in the lan966x SoC.
>
> Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
> ---
> drivers/phy/microchip/Kconfig | 8 +
> drivers/phy/microchip/Makefile | 1 +
> drivers/phy/microchip/lan966x_serdes.c | 540 ++++++++++++++++++++
> drivers/phy/microchip/lan966x_serdes_regs.h | 482 +++++++++++++++++
> 4 files changed, 1031 insertions(+)
> create mode 100644 drivers/phy/microchip/lan966x_serdes.c
> create mode 100644 drivers/phy/microchip/lan966x_serdes_regs.h
>
> diff --git a/drivers/phy/microchip/Kconfig b/drivers/phy/microchip/Kconfig
> index 3728a284bf64..38039ed0754c 100644
> --- a/drivers/phy/microchip/Kconfig
> +++ b/drivers/phy/microchip/Kconfig
> @@ -11,3 +11,11 @@ config PHY_SPARX5_SERDES
> depends on HAS_IOMEM
> help
> Enable this for support of the 10G/25G SerDes on Microchip Sparx5.
> +
> +config PHY_LAN966X_SERDES
> + tristate "SerDes PHY driver for Microchip LAN966X"
> + select GENERIC_PHY
> + depends on OF
> + depends on MFD_SYSCON
> + help
> + Enable this for supporting SerDes muxing with Microchip LAN966X
> diff --git a/drivers/phy/microchip/Makefile b/drivers/phy/microchip/Makefile
> index 7b98345712aa..fd73b87960a5 100644
> --- a/drivers/phy/microchip/Makefile
> +++ b/drivers/phy/microchip/Makefile
> @@ -4,3 +4,4 @@
> #
>
> obj-$(CONFIG_PHY_SPARX5_SERDES) := sparx5_serdes.o
> +obj-$(CONFIG_PHY_LAN966X_SERDES) := lan966x_serdes.o
> diff --git a/drivers/phy/microchip/lan966x_serdes.c b/drivers/phy/microchip/lan966x_serdes.c
> new file mode 100644
> index 000000000000..e663bb9186a8
> --- /dev/null
> +++ b/drivers/phy/microchip/lan966x_serdes.c
> @@ -0,0 +1,540 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
Any reason why this is dual licensed, why not GPL only?
> +
> +#include <linux/err.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_platform.h>
> +#include <linux/phy.h>
Why this header?
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <dt-bindings/phy/phy-lan966x-serdes.h>
> +#include "lan966x_serdes_regs.h"
> +
> +#define lan_offset_(id, tinst, tcnt, \
> + gbase, ginst, gcnt, gwidth, \
> + raddr, rinst, rcnt, rwidth) \
> + (gbase + ((ginst) * gwidth) + raddr + ((rinst) * rwidth))
> +#define lan_offset(...) lan_offset_(__VA_ARGS__)
> +
> +static void lan_rmw_(u32 val, u32 mask, void __iomem *mem, u32 offset)
> +{
> + u32 v;
> +
> + v = readl(mem + offset);
> + v = (v & ~mask) | (val & mask);
> + writel(v, mem + offset);
> +}
> +
> +#define lan_rmw(val, mask, reg, off) \
> + lan_rmw_(val, mask, reg, lan_offset(off))
> +
> +struct serdes_ctrl {
> + void __iomem *regs;
> + struct device *dev;
> + struct phy *phys[SERDES_MAX];
> + int ref125;
> +};
> +
> +struct serdes_macro {
> + u8 idx;
> + int port;
> + struct serdes_ctrl *ctrl;
> + int speed;
> + phy_interface_t mode;
> +};
> +
> +enum lan966x_sd6g40_mode {
> + LAN966X_SD6G40_MODE_QSGMII,
> + LAN966X_SD6G40_MODE_SGMII,
> +};
> +
> +enum lan966x_sd6g40_ltx2rx {
> + LAN966X_SD6G40_TX2RX_LOOP_NONE,
> + LAN966X_SD6G40_LTX2RX
> +};
> +
> +struct lan966x_sd6g40_setup_args {
> + enum lan966x_sd6g40_mode mode;
> + enum lan966x_sd6g40_ltx2rx tx2rx_loop;
> + bool txinvert;
> + bool rxinvert;
> + bool refclk125M;
> + bool mute;
> +};
> +
> +struct lan966x_sd6g40_mode_args {
> + enum lan966x_sd6g40_mode mode;
> + u8 lane_10bit_sel;
> + u8 mpll_multiplier;
> + u8 ref_clkdiv2;
> + u8 tx_rate;
> + u8 rx_rate;
> +};
> +
> +struct lan966x_sd6g40_setup {
> + u8 rx_term_en;
> + u8 lane_10bit_sel;
> + u8 tx_invert;
> + u8 rx_invert;
> + u8 mpll_multiplier;
> + u8 lane_loopbk_en;
> + u8 ref_clkdiv2;
> + u8 tx_rate;
> + u8 rx_rate;
> +};
> +
> +static int lan966x_sd6g40_reg_cfg(struct serdes_macro *macro,
> + struct lan966x_sd6g40_setup *res_struct,
> + u32 idx)
> +{
> + u32 value;
> +
> + /* Note: SerDes HSIO is configured in 1G_LAN mode */
> + lan_rmw(HSIO_SD_CFG_LANE_10BIT_SEL(res_struct->lane_10bit_sel) |
> + HSIO_SD_CFG_RX_RATE(res_struct->rx_rate) |
> + HSIO_SD_CFG_TX_RATE(res_struct->tx_rate) |
> + HSIO_SD_CFG_TX_INVERT(res_struct->tx_invert) |
> + HSIO_SD_CFG_RX_INVERT(res_struct->rx_invert) |
> + HSIO_SD_CFG_LANE_LOOPBK_EN(res_struct->lane_loopbk_en) |
> + HSIO_SD_CFG_RX_RESET(0) |
> + HSIO_SD_CFG_TX_RESET(0),
> + HSIO_SD_CFG_LANE_10BIT_SEL_M |
> + HSIO_SD_CFG_RX_RATE_M |
> + HSIO_SD_CFG_TX_RATE_M |
> + HSIO_SD_CFG_TX_INVERT_M |
> + HSIO_SD_CFG_RX_INVERT_M |
> + HSIO_SD_CFG_LANE_LOOPBK_EN_M |
> + HSIO_SD_CFG_RX_RESET_M |
> + HSIO_SD_CFG_TX_RESET_M,
> + macro->ctrl->regs, HSIO_SD_CFG(idx));
> +
> + lan_rmw(HSIO_MPLL_CFG_MPLL_MULTIPLIER(res_struct->mpll_multiplier) |
> + HSIO_MPLL_CFG_REF_CLKDIV2(res_struct->ref_clkdiv2),
> + HSIO_MPLL_CFG_MPLL_MULTIPLIER_M |
> + HSIO_MPLL_CFG_REF_CLKDIV2_M,
> + macro->ctrl->regs, HSIO_MPLL_CFG(idx));
> +
> + lan_rmw(HSIO_SD_CFG_RX_TERM_EN(res_struct->rx_term_en),
> + HSIO_SD_CFG_RX_TERM_EN_M,
> + macro->ctrl->regs, HSIO_SD_CFG(idx));
> +
> + lan_rmw(HSIO_MPLL_CFG_REF_SSP_EN(1),
> + HSIO_MPLL_CFG_REF_SSP_EN_M,
> + macro->ctrl->regs, HSIO_MPLL_CFG(idx));
> +
> + usleep_range(USEC_PER_MSEC, 2 * USEC_PER_MSEC);
> +
> + lan_rmw(HSIO_SD_CFG_PHY_RESET(0),
> + HSIO_SD_CFG_PHY_RESET_M,
> + macro->ctrl->regs, HSIO_SD_CFG(idx));
> +
> + usleep_range(USEC_PER_MSEC, 2 * USEC_PER_MSEC);
> +
> + lan_rmw(HSIO_MPLL_CFG_MPLL_EN(1),
> + HSIO_MPLL_CFG_MPLL_EN_M,
> + macro->ctrl->regs, HSIO_MPLL_CFG(idx));
> +
> + usleep_range(7 * USEC_PER_MSEC, 8 * USEC_PER_MSEC);
> +
> + value = readl(macro->ctrl->regs + lan_offset(HSIO_SD_STAT(idx)));
> + value = HSIO_SD_STAT_MPLL_STATE_X(value);
> + if (value != 0x1) {
> + pr_info("Unexpected sd_sd_stat[%u] mpll_state was 0x1 but is 0x%x\n",
> + idx, value);
maybe an err log? Also why not use dev_err here?
> + return -EIO;
> + }
> +
> + lan_rmw(HSIO_SD_CFG_TX_CM_EN(1),
> + HSIO_SD_CFG_TX_CM_EN_M,
> + macro->ctrl->regs, HSIO_SD_CFG(idx));
> +
> + usleep_range(USEC_PER_MSEC, 2 * USEC_PER_MSEC);
> +
> + value = readl(macro->ctrl->regs + lan_offset(HSIO_SD_STAT(idx)));
> + value = HSIO_SD_STAT_TX_CM_STATE_X(value);
> + if (value != 0x1) {
> + pr_info("Unexpected sd_sd_stat[%u] tx_cm_state was 0x1 but is 0x%x\n",
> + idx, value);
here as well
> + return -EIO;
> + }
> +
> + lan_rmw(HSIO_SD_CFG_RX_PLL_EN(1) |
> + HSIO_SD_CFG_TX_EN(1),
> + HSIO_SD_CFG_RX_PLL_EN_M |
> + HSIO_SD_CFG_TX_EN_M,
> + macro->ctrl->regs, HSIO_SD_CFG(idx));
> +
> + usleep_range(USEC_PER_MSEC, 2 * USEC_PER_MSEC);
> +
> + /* Waiting for serdes 0 rx DPLL to lock... */
> + value = readl(macro->ctrl->regs + lan_offset(HSIO_SD_STAT(idx)));
> + value = HSIO_SD_STAT_RX_PLL_STATE_X(value);
> + if (value != 0x1) {
> + pr_info("Unexpected sd_sd_stat[%u] rx_pll_state was 0x1 but is 0x%x\n",
> + idx, value);
> + return -EIO;
> + }
> +
> + /* Waiting for serdes 0 tx operational... */
> + value = readl(macro->ctrl->regs + lan_offset(HSIO_SD_STAT(idx)));
> + value = HSIO_SD_STAT_TX_STATE_X(value);
> + if (value != 0x1) {
> + pr_info("Unexpected sd_sd_stat[%u] tx_state was 0x1 but is 0x%x\n",
> + idx, value);
> + return -EIO;
> + }
> +
> + lan_rmw(HSIO_SD_CFG_TX_DATA_EN(1) |
> + HSIO_SD_CFG_RX_DATA_EN(1),
> + HSIO_SD_CFG_TX_DATA_EN_M |
> + HSIO_SD_CFG_RX_DATA_EN_M,
> + macro->ctrl->regs, HSIO_SD_CFG(idx));
> +
> + return 0;
> +}
> +
> +static int lan966x_sd6g40_get_conf_from_mode(struct serdes_macro *macro,
> + enum lan966x_sd6g40_mode f_mode,
> + bool ref125M,
> + struct lan966x_sd6g40_mode_args *ret_val)
> +{
> + switch (f_mode) {
> + case LAN966X_SD6G40_MODE_QSGMII:
> + ret_val->lane_10bit_sel = 0;
> + if (ref125M) {
> + ret_val->mpll_multiplier = 40;
> + ret_val->ref_clkdiv2 = 0x1;
> + ret_val->tx_rate = 0x0;
> + ret_val->rx_rate = 0x0;
> + } else {
> + ret_val->mpll_multiplier = 100;
> + ret_val->ref_clkdiv2 = 0x0;
> + ret_val->tx_rate = 0x0;
> + ret_val->rx_rate = 0x0;
> + }
> + break;
empty line here please
> + case LAN966X_SD6G40_MODE_SGMII:
> + ret_val->lane_10bit_sel = 1;
> + if (ref125M) {
> + ret_val->mpll_multiplier = macro->speed == SPEED_2500 ? 50 : 40;
> + ret_val->ref_clkdiv2 = 0x1;
> + ret_val->tx_rate = macro->speed == SPEED_2500 ? 0x1 : 0x2;
> + ret_val->rx_rate = macro->speed == SPEED_2500 ? 0x1 : 0x2;
> + } else {
> + ret_val->mpll_multiplier = macro->speed == SPEED_2500 ? 125 : 100;
> + ret_val->ref_clkdiv2 = 0x0;
> + ret_val->tx_rate = macro->speed == SPEED_2500 ? 0x1 : 0x2;
> + ret_val->rx_rate = macro->speed == SPEED_2500 ? 0x1 : 0x2;
> + }
> + break;
> + default:
> + return -EOPNOTSUPP;
> + }
> +
> + return 0;
> +}
> +
> +static int lan966x_calc_sd6g40_setup_lane(struct serdes_macro *macro,
> + struct lan966x_sd6g40_setup_args config,
> + struct lan966x_sd6g40_setup *ret_val)
> +{
> + struct lan966x_sd6g40_mode_args sd6g40_mode;
> + struct lan966x_sd6g40_mode_args *mode_args = &sd6g40_mode;
> + int ret;
> +
> + ret = lan966x_sd6g40_get_conf_from_mode(macro, config.mode,
> + config.refclk125M, mode_args);
> + if (ret)
> + return ret;
> +
> + ret_val->lane_10bit_sel = mode_args->lane_10bit_sel;
> + ret_val->rx_rate = mode_args->rx_rate;
> + ret_val->tx_rate = mode_args->tx_rate;
> + ret_val->mpll_multiplier = mode_args->mpll_multiplier;
> + ret_val->ref_clkdiv2 = mode_args->ref_clkdiv2;
> + ret_val->rx_term_en = 0;
> +
> + if (config.tx2rx_loop == LAN966X_SD6G40_LTX2RX)
> + ret_val->lane_loopbk_en = 1;
> + else
> + ret_val->lane_loopbk_en = 0;
> +
> + if (config.txinvert)
> + ret_val->tx_invert = 1;
> + else
> + ret_val->tx_invert = 0;
ret_val->tx_invert = !!config.txinvert;
> +
> + if (config.rxinvert)
> + ret_val->rx_invert = 1;
> + else
> + ret_val->rx_invert = 0;
> +
> + return 0;
> +}
> +
> +static int lan966x_sd6g40_setup_lane(struct serdes_macro *macro,
> + struct lan966x_sd6g40_setup_args config,
> + u32 idx)
> +{
> + struct lan966x_sd6g40_setup calc_results;
> + int ret;
> +
> + memset(&calc_results, 0x0, sizeof(calc_results));
why not initialize calc_results and skip memeset
struct lan966x_sd6g40_setup calc_results = {};
> +
> + ret = lan966x_calc_sd6g40_setup_lane(macro, config, &calc_results);
> + if (ret)
> + return ret;
> +
> + return lan966x_sd6g40_reg_cfg(macro, &calc_results, idx);
> +}
> +
> +static int lan966x_sd6g40_setup(struct serdes_macro *macro, u32 idx, int mode)
> +{
> + struct lan966x_sd6g40_setup_args conf;
> +
> + memset(&conf, 0x0, sizeof(conf));
here too
> + conf.refclk125M = macro->ctrl->ref125;
> +
> + if (mode == PHY_INTERFACE_MODE_QSGMII)
> + conf.mode = LAN966X_SD6G40_MODE_QSGMII;
> + else
> + conf.mode = LAN966X_SD6G40_MODE_SGMII;
> +
> + return lan966x_sd6g40_setup_lane(macro, conf, idx);
> +}
> +
> +struct serdes_mux {
> + u8 idx;
> + u8 port;
> + enum phy_mode mode;
> + int submode;
> + u32 mask;
> + u32 mux;
> +};
> +
> +#define SERDES_MUX(_idx, _port, _mode, _submode, _mask, _mux) { \
> + .idx = _idx, \
> + .port = _port, \
> + .mode = _mode, \
> + .submode = _submode, \
> + .mask = _mask, \
> + .mux = _mux, \
> +}
structs and macros at the top fo the file pls
> +
> +#define SERDES_MUX_GMII(i, p, m, c) \
> + SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_GMII, m, c)
> +#define SERDES_MUX_SGMII(i, p, m, c) \
> + SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_SGMII, m, c)
> +#define SERDES_MUX_QSGMII(i, p, m, c) \
> + SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_QSGMII, m, c)
> +#define SERDES_MUX_RGMII(i, p, m, c) \
> + SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_RGMII, m, c)
> +
> +static const struct serdes_mux lan966x_serdes_muxes[] = {
> + SERDES_MUX_QSGMII(SERDES6G(1), 0, HSIO_HW_CFG_QSGMII_ENA_M,
> + HSIO_HW_CFG_QSGMII_ENA(BIT(0))),
> + SERDES_MUX_QSGMII(SERDES6G(1), 1, HSIO_HW_CFG_QSGMII_ENA_M,
> + HSIO_HW_CFG_QSGMII_ENA(BIT(0))),
> + SERDES_MUX_QSGMII(SERDES6G(1), 2, HSIO_HW_CFG_QSGMII_ENA_M,
> + HSIO_HW_CFG_QSGMII_ENA(BIT(0))),
> + SERDES_MUX_QSGMII(SERDES6G(1), 3, HSIO_HW_CFG_QSGMII_ENA_M,
> + HSIO_HW_CFG_QSGMII_ENA(BIT(0))),
> +
> + SERDES_MUX_QSGMII(SERDES6G(2), 4, HSIO_HW_CFG_QSGMII_ENA_M,
> + HSIO_HW_CFG_QSGMII_ENA(BIT(1))),
> + SERDES_MUX_QSGMII(SERDES6G(2), 5, HSIO_HW_CFG_QSGMII_ENA_M,
> + HSIO_HW_CFG_QSGMII_ENA(BIT(1))),
> + SERDES_MUX_QSGMII(SERDES6G(2), 6, HSIO_HW_CFG_QSGMII_ENA_M,
> + HSIO_HW_CFG_QSGMII_ENA(BIT(1))),
> + SERDES_MUX_QSGMII(SERDES6G(2), 7, HSIO_HW_CFG_QSGMII_ENA_M,
> + HSIO_HW_CFG_QSGMII_ENA(BIT(1))),
> +
> + SERDES_MUX_GMII(PHY(0), 0, HSIO_HW_CFG_GMII_ENA_M,
> + HSIO_HW_CFG_GMII_ENA(BIT(0))),
> + SERDES_MUX_GMII(PHY(1), 1, HSIO_HW_CFG_GMII_ENA_M,
> + HSIO_HW_CFG_GMII_ENA(BIT(1))),
> +
> + SERDES_MUX_SGMII(SERDES6G(0), 0, HSIO_HW_CFG_SD6G_0_CFG_M, 0),
> + SERDES_MUX_SGMII(SERDES6G(1), 1, HSIO_HW_CFG_SD6G_1_CFG_M, 0),
> + SERDES_MUX_SGMII(SERDES6G(0), 2, HSIO_HW_CFG_SD6G_0_CFG_M,
> + HSIO_HW_CFG_SD6G_0_CFG(1)),
> + SERDES_MUX_SGMII(SERDES6G(1), 3, HSIO_HW_CFG_SD6G_1_CFG_M,
> + HSIO_HW_CFG_SD6G_1_CFG(1)),
> +
> + SERDES_MUX_RGMII(RGMII(0), 2, HSIO_HW_CFG_RGMII_0_CFG_M |
> + HSIO_HW_CFG_RGMII_ENA_M,
> + HSIO_HW_CFG_RGMII_0_CFG(BIT(0)) |
> + HSIO_HW_CFG_RGMII_ENA(BIT(0))),
> + SERDES_MUX_RGMII(RGMII(1), 3, HSIO_HW_CFG_RGMII_1_CFG_M |
> + HSIO_HW_CFG_RGMII_ENA_M,
> + HSIO_HW_CFG_RGMII_1_CFG(BIT(0)) |
> + HSIO_HW_CFG_RGMII_ENA(BIT(1))),
> + SERDES_MUX_RGMII(RGMII(0), 5, HSIO_HW_CFG_RGMII_0_CFG_M |
> + HSIO_HW_CFG_RGMII_ENA_M,
> + HSIO_HW_CFG_RGMII_0_CFG(BIT(0)) |
> + HSIO_HW_CFG_RGMII_ENA(BIT(0))),
> + SERDES_MUX_RGMII(RGMII(1), 6, HSIO_HW_CFG_RGMII_1_CFG_M |
> + HSIO_HW_CFG_RGMII_ENA_M,
> + HSIO_HW_CFG_RGMII_1_CFG(BIT(0)) |
> + HSIO_HW_CFG_RGMII_ENA(BIT(1))),
> +};
> +
> +static int serdes_set_mode(struct phy *phy, enum phy_mode mode, int submode)
> +{
> + struct serdes_macro *macro = phy_get_drvdata(phy);
> + unsigned int i;
> + int val;
> +
> + /* As of now only PHY_MODE_ETHERNET is supported */
> + if (mode != PHY_MODE_ETHERNET)
> + return -EOPNOTSUPP;
> +
> + for (i = 0; i < ARRAY_SIZE(lan966x_serdes_muxes); i++) {
> + if (macro->idx != lan966x_serdes_muxes[i].idx ||
> + mode != lan966x_serdes_muxes[i].mode ||
> + submode != lan966x_serdes_muxes[i].submode ||
> + macro->port != lan966x_serdes_muxes[i].port)
> + continue;
> +
> + val = readl(macro->ctrl->regs + lan_offset(HSIO_HW_CFG));
> + val |= lan966x_serdes_muxes[i].mux;
> + lan_rmw(val, lan966x_serdes_muxes[i].mask,
> + macro->ctrl->regs, HSIO_HW_CFG);
> +
> + macro->mode = lan966x_serdes_muxes[i].submode;
> +
> + if (macro->idx < PHY_MAX)
> + return 0;
> +
> + if (macro->idx < SERDES6G_MAX)
> + return lan966x_sd6g40_setup(macro,
> + macro->idx - (PHY_MAX + 1),
> + macro->mode);
> +
> + if (macro->idx < RGMII_MAX)
> + return 0;
> +
> + return -EOPNOTSUPP;
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int serdes_set_speed(struct phy *phy, int speed)
> +{
> + struct serdes_macro *macro = phy_get_drvdata(phy);
> +
> + macro->speed = speed;
> +
> + return lan966x_sd6g40_setup(macro, macro->idx - (PHY_MAX + 1),
> + macro->mode);
> +}
> +
> +static const struct phy_ops serdes_ops = {
> + .set_mode = serdes_set_mode,
> + .set_speed = serdes_set_speed,
> + .owner = THIS_MODULE,
> +};
> +
> +static struct phy *serdes_simple_xlate(struct device *dev,
> + struct of_phandle_args *args)
> +{
> + struct serdes_ctrl *ctrl = dev_get_drvdata(dev);
> + unsigned int port, idx, i;
> +
> + if (args->args_count != 2)
> + return ERR_PTR(-EINVAL);
> +
> + port = args->args[0];
> + idx = args->args[1];
> +
> + for (i = 0; i < SERDES_MAX; i++) {
> + struct serdes_macro *macro = phy_get_drvdata(ctrl->phys[i]);
> +
> + if (idx != macro->idx)
> + continue;
> +
> + macro->port = port;
> + return ctrl->phys[i];
> + }
> +
> + return ERR_PTR(-ENODEV);
> +}
> +
> +static int serdes_phy_create(struct serdes_ctrl *ctrl, u8 idx, struct phy **phy)
> +{
> + struct serdes_macro *macro;
> +
> + *phy = devm_phy_create(ctrl->dev, NULL, &serdes_ops);
> + if (IS_ERR(*phy))
> + return PTR_ERR(*phy);
> +
> + macro = devm_kzalloc(ctrl->dev, sizeof(*macro), GFP_KERNEL);
> + if (!macro)
> + return -ENOMEM;
> +
> + macro->idx = idx;
> + macro->ctrl = ctrl;
> + macro->speed = SPEED_1000;
> + macro->port = -1;
> +
> + phy_set_drvdata(*phy, macro);
> +
> + return 0;
> +}
> +
> +static int serdes_probe(struct platform_device *pdev)
> +{
> + struct phy_provider *provider;
> + struct serdes_ctrl *ctrl;
> + void __iomem *hw_stat;
> + unsigned int i;
> + u32 val;
> + int ret;
> +
> + ctrl = devm_kzalloc(&pdev->dev, sizeof(*ctrl), GFP_KERNEL);
> + if (!ctrl)
> + return -ENOMEM;
> +
> + ctrl->dev = &pdev->dev;
> + ctrl->regs = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
> + if (IS_ERR(ctrl->regs))
> + return PTR_ERR(ctrl->regs);
> +
> + hw_stat = devm_platform_get_and_ioremap_resource(pdev, 1, NULL);
> + if (IS_ERR(hw_stat))
> + return PTR_ERR(hw_stat);
> +
> + for (i = 0; i < SERDES_MAX; i++) {
> + ret = serdes_phy_create(ctrl, i, &ctrl->phys[i]);
> + if (ret)
> + return ret;
> + }
> +
> + val = readl(hw_stat);
> + val = (GENMASK(4, 3) & val) >> 3;
> + ctrl->ref125 = (val == 1 || val == 2);
lots of magic values pls define them
> +
> + dev_set_drvdata(&pdev->dev, ctrl);
> +
> + provider = devm_of_phy_provider_register(ctrl->dev,
> + serdes_simple_xlate);
> +
> + return PTR_ERR_OR_ZERO(provider);
> +}
> +
> +static const struct of_device_id serdes_ids[] = {
> + { .compatible = "microchip,lan966x-serdes", },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, serdes_ids);
> +
> +static struct platform_driver mscc_lan966x_serdes = {
> + .probe = serdes_probe,
> + .driver = {
> + .name = "microchip,lan966x-serdes",
> + .of_match_table = of_match_ptr(serdes_ids),
> + },
> +};
No MODULE_LICENSE()?
> +
> +module_platform_driver(mscc_lan966x_serdes);
> diff --git a/drivers/phy/microchip/lan966x_serdes_regs.h b/drivers/phy/microchip/lan966x_serdes_regs.h
> new file mode 100644
> index 000000000000..c3d3d16c1e97
> --- /dev/null
> +++ b/drivers/phy/microchip/lan966x_serdes_regs.h
> @@ -0,0 +1,482 @@
> +/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
> +/*
> + * Microchip LAN966x Switch driver
> + *
> + * License: Dual MIT/GPL
> + * Copyright (c) 2020 Microchip Technology Inc.
> + */
> +
> +/* This file is autogenerated by cml-utils 2021-05-12 15:48:55 +0200.
what is this cml-utils?
> + * Commit ID: dbe188f718027a2c414b90d45f152b73468cbc5c (dirty)
> + */
> +
> +#ifndef _LAN966X_HSIO_REGS_H_
> +#define _LAN966X_HSIO_REGS_H_
> +
> +#include <linux/bitops.h>
> +
> +#define LAN966X_BUILD_ID_REG GCB_BUILDID
> +enum lan966x_target {
> + TARGET_HSIO = 32,
> + NUM_TARGETS = 66
> +};
> +
> +#define __REG(...) __VA_ARGS__
> +
> +/* HSIO:SYNC_ETH_CFG:SYNC_ETH_CFG */
> +#define HSIO_SYNC_ETH_CFG(r) __REG(TARGET_HSIO,\
> + 0, 1, 0, 0, 1, 8, 0, r, 2, 4)
> +
> +#define HSIO_SYNC_ETH_CFG_SEL_RECO_CLK_SRC(x) (((x) << 4) & GENMASK(6, 4))
> +#define HSIO_SYNC_ETH_CFG_SEL_RECO_CLK_SRC_M GENMASK(6, 4)
> +#define HSIO_SYNC_ETH_CFG_SEL_RECO_CLK_SRC_X(x) (((x) & GENMASK(6, 4)) >> 4)
> +
> +#define HSIO_SYNC_ETH_CFG_SEL_RECO_CLK_DIV(x) (((x) << 1) & GENMASK(3, 1))
> +#define HSIO_SYNC_ETH_CFG_SEL_RECO_CLK_DIV_M GENMASK(3, 1)
> +#define HSIO_SYNC_ETH_CFG_SEL_RECO_CLK_DIV_X(x) (((x) & GENMASK(3, 1)) >> 1)
> +
> +#define HSIO_SYNC_ETH_CFG_RECO_CLK_ENA(x) ((x) & GENMASK(0, 0))
> +#define HSIO_SYNC_ETH_CFG_RECO_CLK_ENA_M GENMASK(0, 0)
> +#define HSIO_SYNC_ETH_CFG_RECO_CLK_ENA_X(x) ((x) & GENMASK(0, 0))
> +
> +/* HSIO:SD:SD_CFG */
> +#define HSIO_SD_CFG(g) __REG(TARGET_HSIO,\
> + 0, 1, 8, g, 3, 32, 0, 0, 1, 4)
> +
> +#define HSIO_SD_CFG_TEST_POWERDOWN(x) (((x) << 28) & GENMASK(28, 28))
> +#define HSIO_SD_CFG_TEST_POWERDOWN_M GENMASK(28, 28)
> +#define HSIO_SD_CFG_TEST_POWERDOWN_X(x) (((x) & GENMASK(28, 28)) >> 28)
> +
> +#define HSIO_SD_CFG_PHY_RESET(x) (((x) << 27) & GENMASK(27, 27))
> +#define HSIO_SD_CFG_PHY_RESET_M GENMASK(27, 27)
> +#define HSIO_SD_CFG_PHY_RESET_X(x) (((x) & GENMASK(27, 27)) >> 27)
> +
> +#define HSIO_SD_CFG_RX_LOS_FILT_CNT(x) (((x) << 20) & GENMASK(26, 20))
> +#define HSIO_SD_CFG_RX_LOS_FILT_CNT_M GENMASK(26, 20)
> +#define HSIO_SD_CFG_RX_LOS_FILT_CNT_X(x) (((x) & GENMASK(26, 20)) >> 20)
> +
> +#define HSIO_SD_CFG_TX_VBOOST_EN(x) (((x) << 19) & GENMASK(19, 19))
> +#define HSIO_SD_CFG_TX_VBOOST_EN_M GENMASK(19, 19)
> +#define HSIO_SD_CFG_TX_VBOOST_EN_X(x) (((x) & GENMASK(19, 19)) >> 19)
> +
> +#define HSIO_SD_CFG_TX_RESET(x) (((x) << 18) & GENMASK(18, 18))
> +#define HSIO_SD_CFG_TX_RESET_M GENMASK(18, 18)
> +#define HSIO_SD_CFG_TX_RESET_X(x) (((x) & GENMASK(18, 18)) >> 18)
> +
> +#define HSIO_SD_CFG_TX_RATE(x) (((x) << 16) & GENMASK(17, 16))
> +#define HSIO_SD_CFG_TX_RATE_M GENMASK(17, 16)
> +#define HSIO_SD_CFG_TX_RATE_X(x) (((x) & GENMASK(17, 16)) >> 16)
> +
> +#define HSIO_SD_CFG_TX_INVERT(x) (((x) << 15) & GENMASK(15, 15))
> +#define HSIO_SD_CFG_TX_INVERT_M GENMASK(15, 15)
> +#define HSIO_SD_CFG_TX_INVERT_X(x) (((x) & GENMASK(15, 15)) >> 15)
> +
> +#define HSIO_SD_CFG_TX_EN(x) (((x) << 14) & GENMASK(14, 14))
> +#define HSIO_SD_CFG_TX_EN_M GENMASK(14, 14)
> +#define HSIO_SD_CFG_TX_EN_X(x) (((x) & GENMASK(14, 14)) >> 14)
> +
> +#define HSIO_SD_CFG_TX_DETECT_RX_REQ(x) (((x) << 13) & GENMASK(13, 13))
> +#define HSIO_SD_CFG_TX_DETECT_RX_REQ_M GENMASK(13, 13)
> +#define HSIO_SD_CFG_TX_DETECT_RX_REQ_X(x) (((x) & GENMASK(13, 13)) >> 13)
> +
> +#define HSIO_SD_CFG_TX_DATA_EN(x) (((x) << 12) & GENMASK(12, 12))
> +#define HSIO_SD_CFG_TX_DATA_EN_M GENMASK(12, 12)
> +#define HSIO_SD_CFG_TX_DATA_EN_X(x) (((x) & GENMASK(12, 12)) >> 12)
> +
> +#define HSIO_SD_CFG_TX_CM_EN(x) (((x) << 11) & GENMASK(11, 11))
> +#define HSIO_SD_CFG_TX_CM_EN_M GENMASK(11, 11)
> +#define HSIO_SD_CFG_TX_CM_EN_X(x) (((x) & GENMASK(11, 11)) >> 11)
> +
> +#define HSIO_SD_CFG_LANE_10BIT_SEL(x) (((x) << 10) & GENMASK(10, 10))
> +#define HSIO_SD_CFG_LANE_10BIT_SEL_M GENMASK(10, 10)
> +#define HSIO_SD_CFG_LANE_10BIT_SEL_X(x) (((x) & GENMASK(10, 10)) >> 10)
> +
> +#define HSIO_SD_CFG_RX_TERM_EN(x) (((x) << 9) & GENMASK(9, 9))
> +#define HSIO_SD_CFG_RX_TERM_EN_M GENMASK(9, 9)
> +#define HSIO_SD_CFG_RX_TERM_EN_X(x) (((x) & GENMASK(9, 9)) >> 9)
> +
> +#define HSIO_SD_CFG_RX_RESET(x) (((x) << 8) & GENMASK(8, 8))
> +#define HSIO_SD_CFG_RX_RESET_M GENMASK(8, 8)
> +#define HSIO_SD_CFG_RX_RESET_X(x) (((x) & GENMASK(8, 8)) >> 8)
> +
> +#define HSIO_SD_CFG_RX_RATE(x) (((x) << 6) & GENMASK(7, 6))
> +#define HSIO_SD_CFG_RX_RATE_M GENMASK(7, 6)
> +#define HSIO_SD_CFG_RX_RATE_X(x) (((x) & GENMASK(7, 6)) >> 6)
> +
> +#define HSIO_SD_CFG_RX_PLL_EN(x) (((x) << 5) & GENMASK(5, 5))
> +#define HSIO_SD_CFG_RX_PLL_EN_M GENMASK(5, 5)
> +#define HSIO_SD_CFG_RX_PLL_EN_X(x) (((x) & GENMASK(5, 5)) >> 5)
> +
> +#define HSIO_SD_CFG_RX_LOS_EN(x) (((x) << 4) & GENMASK(4, 4))
> +#define HSIO_SD_CFG_RX_LOS_EN_M GENMASK(4, 4)
> +#define HSIO_SD_CFG_RX_LOS_EN_X(x) (((x) & GENMASK(4, 4)) >> 4)
> +
> +#define HSIO_SD_CFG_RX_INVERT(x) (((x) << 3) & GENMASK(3, 3))
> +#define HSIO_SD_CFG_RX_INVERT_M GENMASK(3, 3)
> +#define HSIO_SD_CFG_RX_INVERT_X(x) (((x) & GENMASK(3, 3)) >> 3)
> +
> +#define HSIO_SD_CFG_RX_DATA_EN(x) (((x) << 2) & GENMASK(2, 2))
> +#define HSIO_SD_CFG_RX_DATA_EN_M GENMASK(2, 2)
> +#define HSIO_SD_CFG_RX_DATA_EN_X(x) (((x) & GENMASK(2, 2)) >> 2)
> +
> +#define HSIO_SD_CFG_RX_ALIGN_EN(x) (((x) << 1) & GENMASK(1, 1))
> +#define HSIO_SD_CFG_RX_ALIGN_EN_M GENMASK(1, 1)
> +#define HSIO_SD_CFG_RX_ALIGN_EN_X(x) (((x) & GENMASK(1, 1)) >> 1)
> +
> +#define HSIO_SD_CFG_LANE_LOOPBK_EN(x) ((x) & GENMASK(0, 0))
> +#define HSIO_SD_CFG_LANE_LOOPBK_EN_M GENMASK(0, 0)
> +#define HSIO_SD_CFG_LANE_LOOPBK_EN_X(x) ((x) & GENMASK(0, 0))
> +
> +/* HSIO:SD:SD_CFG2 */
> +#define HSIO_SD_CFG2(g) __REG(TARGET_HSIO,\
> + 0, 1, 8, g, 3, 32, 4, 0, 1, 4)
> +
> +#define HSIO_SD_CFG2_RX_EQ(x) (((x) << 25) & GENMASK(27, 25))
> +#define HSIO_SD_CFG2_RX_EQ_M GENMASK(27, 25)
> +#define HSIO_SD_CFG2_RX_EQ_X(x) (((x) & GENMASK(27, 25)) >> 25)
You should look at bitfield.h for helpers, you can skip these
--
~Vinod
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