diff options
| -rw-r--r-- | MAINTAINERS | 6 | ||||
| -rw-r--r-- | drivers/phy/freescale/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/phy/freescale/Makefile | 1 | ||||
| -rw-r--r-- | drivers/phy/freescale/phy-fsl-lynx-28g.c | 624 |
4 files changed, 641 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 12440bdef9b7..8396d6d3d3de 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11333,6 +11333,12 @@ S: Maintained W: http://linux-test-project.github.io/ T: git git://github.com/linux-test-project/ltp.git +LYNX 28G SERDES PHY DRIVER +M: Ioana Ciornei <ioana.ciornei@nxp.com> +L: netdev@vger.kernel.org +S: Supported +F: drivers/phy/freescale/phy-fsl-lynx-28g.c + LYNX PCS MODULE M: Ioana Ciornei <ioana.ciornei@nxp.com> L: netdev@vger.kernel.org diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig index c3669c28ea9f..0e91cd99c36b 100644 --- a/drivers/phy/freescale/Kconfig +++ b/drivers/phy/freescale/Kconfig @@ -22,3 +22,13 @@ config PHY_FSL_IMX8M_PCIE help Enable this to add support for the PCIE PHY as found on i.MX8M family of SOCs. + +config PHY_FSL_LYNX_28G + tristate "Freescale Layerscape Lynx 28G SerDes PHY support" + depends on OF + select GENERIC_PHY + help + Enable this to add support for the Lynx SerDes 28G PHY as + found on NXP's Layerscape platforms such as LX2160A. + Used to change the protocol running on SerDes lanes at runtime. + Only useful for a restricted set of Ethernet protocols. diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile index 55d07c742ab0..3518d5dbe8a7 100644 --- a/drivers/phy/freescale/Makefile +++ b/drivers/phy/freescale/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_PHY_FSL_IMX8MQ_USB) += phy-fsl-imx8mq-usb.o obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY) += phy-fsl-imx8-mipi-dphy.o obj-$(CONFIG_PHY_FSL_IMX8M_PCIE) += phy-fsl-imx8m-pcie.o +obj-$(CONFIG_PHY_FSL_LYNX_28G) += phy-fsl-lynx-28g.o diff --git a/drivers/phy/freescale/phy-fsl-lynx-28g.c b/drivers/phy/freescale/phy-fsl-lynx-28g.c new file mode 100644 index 000000000000..a2b060e9e284 --- /dev/null +++ b/drivers/phy/freescale/phy-fsl-lynx-28g.c @@ -0,0 +1,624 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Copyright (c) 2021-2022 NXP. */ + +#include <linux/module.h> +#include <linux/phy.h> +#include <linux/phy/phy.h> +#include <linux/platform_device.h> +#include <linux/workqueue.h> +#include <linux/workqueue.h> + +#define LYNX_28G_NUM_LANE 8 +#define LYNX_28G_NUM_PLL 2 + +/* General registers per SerDes block */ +#define LYNX_28G_PCC8 0x10a0 +#define LYNX_28G_PCC8_SGMII 0x1 +#define LYNX_28G_PCC8_SGMII_DIS 0x0 + +#define LYNX_28G_PCCC 0x10b0 +#define LYNX_28G_PCCC_10GBASER 0x9 +#define LYNX_28G_PCCC_USXGMII 0x1 +#define LYNX_28G_PCCC_SXGMII_DIS 0x0 + +#define LYNX_28G_LNa_PCC_OFFSET(lane) (4 * (LYNX_28G_NUM_LANE - (lane->id) - 1)) + +/* Per PLL registers */ +#define LYNX_28G_PLLnRSTCTL(pll) (0x400 + (pll) * 0x100 + 0x0) +#define LYNX_28G_PLLnRSTCTL_DIS(rstctl) (((rstctl) & BIT(24)) >> 24) +#define LYNX_28G_PLLnRSTCTL_LOCK(rstctl) (((rstctl) & BIT(23)) >> 23) + +#define LYNX_28G_PLLnCR0(pll) (0x400 + (pll) * 0x100 + 0x4) +#define LYNX_28G_PLLnCR0_REFCLK_SEL(cr0) (((cr0) & GENMASK(20, 16))) +#define LYNX_28G_PLLnCR0_REFCLK_SEL_100MHZ 0x0 +#define LYNX_28G_PLLnCR0_REFCLK_SEL_125MHZ 0x10000 +#define LYNX_28G_PLLnCR0_REFCLK_SEL_156MHZ 0x20000 +#define LYNX_28G_PLLnCR0_REFCLK_SEL_150MHZ 0x30000 +#define LYNX_28G_PLLnCR0_REFCLK_SEL_161MHZ 0x40000 + +#define LYNX_28G_PLLnCR1(pll) (0x400 + (pll) * 0x100 + 0x8) +#define LYNX_28G_PLLnCR1_FRATE_SEL(cr1) (((cr1) & GENMASK(28, 24))) +#define LYNX_28G_PLLnCR1_FRATE_5G_10GVCO 0x0 +#define LYNX_28G_PLLnCR1_FRATE_5G_25GVCO 0x10000000 +#define LYNX_28G_PLLnCR1_FRATE_10G_20GVCO 0x6000000 + +/* Per SerDes lane registers */ +/* Lane a General Control Register */ +#define LYNX_28G_LNaGCR0(lane) (0x800 + (lane) * 0x100 + 0x0) +#define LYNX_28G_LNaGCR0_PROTO_SEL_MSK GENMASK(7, 3) +#define LYNX_28G_LNaGCR0_PROTO_SEL_SGMII 0x8 +#define LYNX_28G_LNaGCR0_PROTO_SEL_XFI 0x50 +#define LYNX_28G_LNaGCR0_IF_WIDTH_MSK GENMASK(2, 0) +#define LYNX_28G_LNaGCR0_IF_WIDTH_10_BIT 0x0 +#define LYNX_28G_LNaGCR0_IF_WIDTH_20_BIT 0x2 + +/* Lane a Tx Reset Control Register */ +#define LYNX_28G_LNaTRSTCTL(lane) (0x800 + (lane) * 0x100 + 0x20) +#define LYNX_28G_LNaTRSTCTL_HLT_REQ BIT(27) +#define LYNX_28G_LNaTRSTCTL_RST_DONE BIT(30) +#define LYNX_28G_LNaTRSTCTL_RST_REQ BIT(31) + +/* Lane a Tx General Control Register */ +#define LYNX_28G_LNaTGCR0(lane) (0x800 + (lane) * 0x100 + 0x24) +#define LYNX_28G_LNaTGCR0_USE_PLLF 0x0 +#define LYNX_28G_LNaTGCR0_USE_PLLS BIT(28) +#define LYNX_28G_LNaTGCR0_USE_PLL_MSK BIT(28) +#define LYNX_28G_LNaTGCR0_N_RATE_FULL 0x0 +#define LYNX_28G_LNaTGCR0_N_RATE_HALF 0x1000000 +#define LYNX_28G_LNaTGCR0_N_RATE_QUARTER 0x2000000 +#define LYNX_28G_LNaTGCR0_N_RATE_MSK GENMASK(26, 24) + +#define LYNX_28G_LNaTECR0(lane) (0x800 + (lane) * 0x100 + 0x30) + +/* Lane a Rx Reset Control Register */ +#define LYNX_28G_LNaRRSTCTL(lane) (0x800 + (lane) * 0x100 + 0x40) +#define LYNX_28G_LNaRRSTCTL_HLT_REQ BIT(27) +#define LYNX_28G_LNaRRSTCTL_RST_DONE BIT(30) +#define LYNX_28G_LNaRRSTCTL_RST_REQ BIT(31) +#define LYNX_28G_LNaRRSTCTL_CDR_LOCK BIT(12) + +/* Lane a Rx General Control Register */ +#define LYNX_28G_LNaRGCR0(lane) (0x800 + (lane) * 0x100 + 0x44) +#define LYNX_28G_LNaRGCR0_USE_PLLF 0x0 +#define LYNX_28G_LNaRGCR0_USE_PLLS BIT(28) +#define LYNX_28G_LNaRGCR0_USE_PLL_MSK BIT(28) +#define LYNX_28G_LNaRGCR0_N_RATE_MSK GENMASK(26, 24) +#define LYNX_28G_LNaRGCR0_N_RATE_FULL 0x0 +#define LYNX_28G_LNaRGCR0_N_RATE_HALF 0x1000000 +#define LYNX_28G_LNaRGCR0_N_RATE_QUARTER 0x2000000 +#define LYNX_28G_LNaRGCR0_N_RATE_MSK GENMASK(26, 24) + +#define LYNX_28G_LNaRGCR1(lane) (0x800 + (lane) * 0x100 + 0x48) + +#define LYNX_28G_LNaRECR0(lane) (0x800 + (lane) * 0x100 + 0x50) +#define LYNX_28G_LNaRECR1(lane) (0x800 + (lane) * 0x100 + 0x54) +#define LYNX_28G_LNaRECR2(lane) (0x800 + (lane) * 0x100 + 0x58) + +#define LYNX_28G_LNaRSCCR0(lane) (0x800 + (lane) * 0x100 + 0x74) + +#define LYNX_28G_LNaPSS(lane) (0x1000 + (lane) * 0x4) +#define LYNX_28G_LNaPSS_TYPE(pss) (((pss) & GENMASK(30, 24)) >> 24) +#define LYNX_28G_LNaPSS_TYPE_SGMII 0x4 +#define LYNX_28G_LNaPSS_TYPE_XFI 0x28 + +#define LYNX_28G_SGMIIaCR1(lane) (0x1804 + (lane) * 0x10) +#define LYNX_28G_SGMIIaCR1_SGPCS_EN BIT(11) +#define LYNX_28G_SGMIIaCR1_SGPCS_DIS 0x0 +#define LYNX_28G_SGMIIaCR1_SGPCS_MSK BIT(11) + +struct lynx_28g_priv; + +struct lynx_28g_pll { + struct lynx_28g_priv *priv; + u32 rstctl, cr0, cr1; + int id; + DECLARE_PHY_INTERFACE_MASK(supported); +}; + +struct lynx_28g_lane { + struct lynx_28g_priv *priv; + struct phy *phy; + bool powered_up; + bool init; + unsigned int id; + phy_interface_t interface; +}; + +struct lynx_28g_priv { + void __iomem *base; + struct device *dev; + struct lynx_28g_pll pll[LYNX_28G_NUM_PLL]; + struct lynx_28g_lane lane[LYNX_28G_NUM_LANE]; + + struct delayed_work cdr_check; +}; + +static void lynx_28g_rmw(struct lynx_28g_priv *priv, unsigned long off, + u32 val, u32 mask) +{ + void __iomem *reg = priv->base + off; + u32 orig, tmp; + + orig = ioread32(reg); + tmp = orig & ~mask; + tmp |= val; + iowrite32(tmp, reg); +} + +#define lynx_28g_lane_rmw(lane, reg, val, mask) \ + lynx_28g_rmw((lane)->priv, LYNX_28G_##reg(lane->id), \ + LYNX_28G_##reg##_##val, LYNX_28G_##reg##_##mask) +#define lynx_28g_lane_read(lane, reg) \ + ioread32((lane)->priv->base + LYNX_28G_##reg((lane)->id)) +#define lynx_28g_pll_read(pll, reg) \ + ioread32((pll)->priv->base + LYNX_28G_##reg((pll)->id)) + +static bool lynx_28g_supports_interface(struct lynx_28g_priv *priv, int intf) +{ + int i; + + for (i = 0; i < LYNX_28G_NUM_PLL; i++) { + if (LYNX_28G_PLLnRSTCTL_DIS(priv->pll[i].rstctl)) + continue; + + if (test_bit(intf, priv->pll[i].supported)) + return true; + } + + return false; +} + +static struct lynx_28g_pll *lynx_28g_pll_get(struct lynx_28g_priv *priv, + phy_interface_t intf) +{ + struct lynx_28g_pll *pll; + int i; + + for (i = 0; i < LYNX_28G_NUM_PLL; i++) { + pll = &priv->pll[i]; + + if (LYNX_28G_PLLnRSTCTL_DIS(pll->rstctl)) + continue; + + if (test_bit(intf, pll->supported)) + return pll; + } + + return NULL; +} + +static void lynx_28g_lane_set_nrate(struct lynx_28g_lane *lane, + struct lynx_28g_pll *pll, + phy_interface_t intf) +{ + switch (LYNX_28G_PLLnCR1_FRATE_SEL(pll->cr1)) { + case LYNX_28G_PLLnCR1_FRATE_5G_10GVCO: + case LYNX_28G_PLLnCR1_FRATE_5G_25GVCO: + switch (intf) { + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_1000BASEX: + lynx_28g_lane_rmw(lane, LNaTGCR0, N_RATE_QUARTER, N_RATE_MSK); + lynx_28g_lane_rmw(lane, LNaRGCR0, N_RATE_QUARTER, N_RATE_MSK); + break; + default: + break; + } + break; + case LYNX_28G_PLLnCR1_FRATE_10G_20GVCO: + switch (intf) { + case PHY_INTERFACE_MODE_10GBASER: + case PHY_INTERFACE_MODE_USXGMII: + lynx_28g_lane_rmw(lane, LNaTGCR0, N_RATE_FULL, N_RATE_MSK); + lynx_28g_lane_rmw(lane, LNaRGCR0, N_RATE_FULL, N_RATE_MSK); + break; + default: + break; + } + break; + default: + break; + } +} + +static void lynx_28g_lane_set_pll(struct lynx_28g_lane *lane, + struct lynx_28g_pll *pll) +{ + if (pll->id == 0) { + lynx_28g_lane_rmw(lane, LNaTGCR0, USE_PLLF, USE_PLL_MSK); + lynx_28g_lane_rmw(lane, LNaRGCR0, USE_PLLF, USE_PLL_MSK); + } else { + lynx_28g_lane_rmw(lane, LNaTGCR0, USE_PLLS, USE_PLL_MSK); + lynx_28g_lane_rmw(lane, LNaRGCR0, USE_PLLS, USE_PLL_MSK); + } +} + +static void lynx_28g_cleanup_lane(struct lynx_28g_lane *lane) +{ + u32 lane_offset = LYNX_28G_LNa_PCC_OFFSET(lane); + struct lynx_28g_priv *priv = lane->priv; + + /* Cleanup the protocol configuration registers of the current protocol */ + switch (lane->interface) { + case PHY_INTERFACE_MODE_10GBASER: + lynx_28g_rmw(priv, LYNX_28G_PCCC, + LYNX_28G_PCCC_SXGMII_DIS << lane_offset, + GENMASK(3, 0) << lane_offset); + break; + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_1000BASEX: + lynx_28g_rmw(priv, LYNX_28G_PCC8, + LYNX_28G_PCC8_SGMII_DIS << lane_offset, + GENMASK(3, 0) << lane_offset); + break; + default: + break; + } +} + +static void lynx_28g_lane_set_sgmii(struct lynx_28g_lane *lane) +{ + u32 lane_offset = LYNX_28G_LNa_PCC_OFFSET(lane); + struct lynx_28g_priv *priv = lane->priv; + struct lynx_28g_pll *pll; + + lynx_28g_cleanup_lane(lane); + + /* Setup the lane to run in SGMII */ + lynx_28g_rmw(priv, LYNX_28G_PCC8, + LYNX_28G_PCC8_SGMII << lane_offset, + GENMASK(3, 0) << lane_offset); + + /* Setup the protocol select and SerDes parallel interface width */ + lynx_28g_lane_rmw(lane, LNaGCR0, PROTO_SEL_SGMII, PROTO_SEL_MSK); + lynx_28g_lane_rmw(lane, LNaGCR0, IF_WIDTH_10_BIT, IF_WIDTH_MSK); + + /* Switch to the PLL that works with this interface type */ + pll = lynx_28g_pll_get(priv, PHY_INTERFACE_MODE_SGMII); + lynx_28g_lane_set_pll(lane, pll); + + /* Choose the portion of clock net to be used on this lane */ + lynx_28g_lane_set_nrate(lane, pll, PHY_INTERFACE_MODE_SGMII); + + /* Enable the SGMII PCS */ + lynx_28g_lane_rmw(lane, SGMIIaCR1, SGPCS_EN, SGPCS_MSK); + + /* Configure the appropriate equalization parameters for the protocol */ + iowrite32(0x00808006, priv->base + LYNX_28G_LNaTECR0(lane->id)); + iowrite32(0x04310000, priv->base + LYNX_28G_LNaRGCR1(lane->id)); + iowrite32(0x9f800000, priv->base + LYNX_28G_LNaRECR0(lane->id)); + iowrite32(0x001f0000, priv->base + LYNX_28G_LNaRECR1(lane->id)); + iowrite32(0x00000000, priv->base + LYNX_28G_LNaRECR2(lane->id)); + iowrite32(0x00000000, priv->base + LYNX_28G_LNaRSCCR0(lane->id)); +} + +static void lynx_28g_lane_set_10gbaser(struct lynx_28g_lane *lane) +{ + u32 lane_offset = LYNX_28G_LNa_PCC_OFFSET(lane); + struct lynx_28g_priv *priv = lane->priv; + struct lynx_28g_pll *pll; + + lynx_28g_cleanup_lane(lane); + + /* Enable the SXGMII lane */ + lynx_28g_rmw(priv, LYNX_28G_PCCC, + LYNX_28G_PCCC_10GBASER << lane_offset, + GENMASK(3, 0) << lane_offset); + + /* Setup the protocol select and SerDes parallel interface width */ + lynx_28g_lane_rmw(lane, LNaGCR0, PROTO_SEL_XFI, PROTO_SEL_MSK); + lynx_28g_lane_rmw(lane, LNaGCR0, IF_WIDTH_20_BIT, IF_WIDTH_MSK); + + /* Switch to the PLL that works with this interface type */ + pll = lynx_28g_pll_get(priv, PHY_INTERFACE_MODE_10GBASER); + lynx_28g_lane_set_pll(lane, pll); + + /* Choose the portion of clock net to be used on this lane */ + lynx_28g_lane_set_nrate(lane, pll, PHY_INTERFACE_MODE_10GBASER); + + /* Disable the SGMII PCS */ + lynx_28g_lane_rmw(lane, SGMIIaCR1, SGPCS_DIS, SGPCS_MSK); + + /* Configure the appropriate equalization parameters for the protocol */ + iowrite32(0x10808307, priv->base + LYNX_28G_LNaTECR0(lane->id)); + iowrite32(0x10000000, priv->base + LYNX_28G_LNaRGCR1(lane->id)); + iowrite32(0x00000000, priv->base + LYNX_28G_LNaRECR0(lane->id)); + iowrite32(0x001f0000, priv->base + LYNX_28G_LNaRECR1(lane->id)); + iowrite32(0x81000020, priv->base + LYNX_28G_LNaRECR2(lane->id)); + iowrite32(0x00002000, priv->base + LYNX_28G_LNaRSCCR0(lane->id)); +} + +static int lynx_28g_power_off(struct phy *phy) +{ + struct lynx_28g_lane *lane = phy_get_drvdata(phy); + u32 trstctl, rrstctl; + + if (!lane->powered_up) + return 0; + + /* Issue a halt request */ + lynx_28g_lane_rmw(lane, LNaTRSTCTL, HLT_REQ, HLT_REQ); + lynx_28g_lane_rmw(lane, LNaRRSTCTL, HLT_REQ, HLT_REQ); + + /* Wait until the halting process is complete */ + do { + trstctl = lynx_28g_lane_read(lane, LNaTRSTCTL); + rrstctl = lynx_28g_lane_read(lane, LNaRRSTCTL); + } while ((trstctl & LYNX_28G_LNaTRSTCTL_HLT_REQ) || + (rrstctl & LYNX_28G_LNaRRSTCTL_HLT_REQ)); + + lane->powered_up = false; + + return 0; +} + +static int lynx_28g_power_on(struct phy *phy) +{ + struct lynx_28g_lane *lane = phy_get_drvdata(phy); + u32 trstctl, rrstctl; + + if (lane->powered_up) + return 0; + + /* Issue a reset request on the lane */ + lynx_28g_lane_rmw(lane, LNaTRSTCTL, RST_REQ, RST_REQ); + lynx_28g_lane_rmw(lane, LNaRRSTCTL, RST_REQ, RST_REQ); + + /* Wait until the reset sequence is completed */ + do { + trstctl = lynx_28g_lane_read(lane, LNaTRSTCTL); + rrstctl = lynx_28g_lane_read(lane, LNaRRSTCTL); + } while (!(trstctl & LYNX_28G_LNaTRSTCTL_RST_DONE) || + !(rrstctl & LYNX_28G_LNaRRSTCTL_RST_DONE)); + + lane->powered_up = true; + + return 0; +} + +static int lynx_28g_set_mode(struct phy *phy, enum phy_mode mode, int submode) +{ + struct lynx_28g_lane *lane = phy_get_drvdata(phy); + struct lynx_28g_priv *priv = lane->priv; + int powered_up = lane->powered_up; + int err = 0; + + if (mode != PHY_MODE_ETHERNET) + return -EOPNOTSUPP; + + if (lane->interface == PHY_INTERFACE_MODE_NA) + return -EOPNOTSUPP; + + if (!lynx_28g_supports_interface(priv, submode)) + return -EOPNOTSUPP; + + /* If the lane is powered up, put the lane into the halt state while + * the reconfiguration is being done. + */ + if (powered_up) + lynx_28g_power_off(phy); + + switch (submode) { + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_1000BASEX: + lynx_28g_lane_set_sgmii(lane); + break; + case PHY_INTERFACE_MODE_10GBASER: + lynx_28g_lane_set_10gbaser(lane); + break; + default: + err = -EOPNOTSUPP; + goto out; + } + + lane->interface = submode; + +out: + /* Power up the lane if necessary */ + if (powered_up) + lynx_28g_power_on(phy); + + return err; +} + +static int lynx_28g_validate(struct phy *phy, enum phy_mode mode, int submode, + union phy_configure_opts *opts __always_unused) +{ + struct lynx_28g_lane *lane = phy_get_drvdata(phy); + struct lynx_28g_priv *priv = lane->priv; + + if (mode != PHY_MODE_ETHERNET) + return -EOPNOTSUPP; + + if (!lynx_28g_supports_interface(priv, submode)) + return -EOPNOTSUPP; + + return 0; +} + +static int lynx_28g_init(struct phy *phy) +{ + struct lynx_28g_lane *lane = phy_get_drvdata(phy); + + /* Mark the fact that the lane was init */ + lane->init = true; + + /* SerDes lanes are powered on at boot time. Any lane that is managed + * by this driver will get powered down at init time aka at dpaa2-eth + * probe time. + */ + lane->powered_up = true; + lynx_28g_power_off(phy); + + return 0; +} + +static const struct phy_ops lynx_28g_ops = { + .init = lynx_28g_init, + .power_on = lynx_28g_power_on, + .power_off = lynx_28g_power_off, + .set_mode = lynx_28g_set_mode, + .validate = lynx_28g_validate, + .owner = THIS_MODULE, +}; + +static void lynx_28g_pll_read_configuration(struct lynx_28g_priv *priv) +{ + struct lynx_28g_pll *pll; + int i; + + for (i = 0; i < LYNX_28G_NUM_PLL; i++) { + pll = &priv->pll[i]; + pll->priv = priv; + pll->id = i; + + pll->rstctl = lynx_28g_pll_read(pll, PLLnRSTCTL); + pll->cr0 = lynx_28g_pll_read(pll, PLLnCR0); + pll->cr1 = lynx_28g_pll_read(pll, PLLnCR1); + + if (LYNX_28G_PLLnRSTCTL_DIS(pll->rstctl)) + continue; + + switch (LYNX_28G_PLLnCR1_FRATE_SEL(pll->cr1)) { + case LYNX_28G_PLLnCR1_FRATE_5G_10GVCO: + case LYNX_28G_PLLnCR1_FRATE_5G_25GVCO: + /* 5GHz clock net */ + __set_bit(PHY_INTERFACE_MODE_1000BASEX, pll->supported); + __set_bit(PHY_INTERFACE_MODE_SGMII, pll->supported); + break; + case LYNX_28G_PLLnCR1_FRATE_10G_20GVCO: + /* 10.3125GHz clock net */ + __set_bit(PHY_INTERFACE_MODE_10GBASER, pll->supported); + break; + default: + /* 6GHz, 12.890625GHz, 8GHz */ + break; + } + } +} + +#define work_to_lynx(w) container_of((w), struct lynx_28g_priv, cdr_check.work) + +static void lynx_28g_cdr_lock_check(struct work_struct *work) +{ + struct lynx_28g_priv *priv = work_to_lynx(work); + struct lynx_28g_lane *lane; + u32 rrstctl; + int i; + + for (i = 0; i < LYNX_28G_NUM_LANE; i++) { + lane = &priv->lane[i]; + + if (!lane->init) + continue; + + if (!lane->powered_up) + continue; + + rrstctl = lynx_28g_lane_read(lane, LNaRRSTCTL); + if (!(rrstctl & LYNX_28G_LNaRRSTCTL_CDR_LOCK)) { + lynx_28g_lane_rmw(lane, LNaRRSTCTL, RST_REQ, RST_REQ); + do { + rrstctl = lynx_28g_lane_read(lane, LNaRRSTCTL); + } while (!(rrstctl & LYNX_28G_LNaRRSTCTL_RST_DONE)); + } + } + queue_delayed_work(system_power_efficient_wq, &priv->cdr_check, + msecs_to_jiffies(1000)); +} + +static void lynx_28g_lane_read_configuration(struct lynx_28g_lane *lane) +{ + u32 pss, protocol; + + pss = lynx_28g_lane_read(lane, LNaPSS); + protocol = LYNX_28G_LNaPSS_TYPE(pss); + switch (protocol) { + case LYNX_28G_LNaPSS_TYPE_SGMII: + lane->interface = PHY_INTERFACE_MODE_SGMII; + break; + case LYNX_28G_LNaPSS_TYPE_XFI: + lane->interface = PHY_INTERFACE_MODE_10GBASER; + break; + default: + lane->interface = PHY_INTERFACE_MODE_NA; + } +} + +static struct phy *lynx_28g_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct lynx_28g_priv *priv = dev_get_drvdata(dev); + int idx = args->args[0]; + + if (WARN_ON(idx >= LYNX_28G_NUM_LANE)) + return ERR_PTR(-EINVAL); + + return priv->lane[idx].phy; +} + +static int lynx_28g_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct phy_provider *provider; + struct lynx_28g_priv *priv; + int i; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + priv->dev = &pdev->dev; + + priv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + lynx_28g_pll_read_configuration(priv); + + for (i = 0; i < LYNX_28G_NUM_LANE; i++) { + struct lynx_28g_lane *lane = &priv->lane[i]; + struct phy *phy; + + memset(lane, 0, sizeof(*lane)); + + phy = devm_phy_create(&pdev->dev, NULL, &lynx_28g_ops); + if (IS_ERR(phy)) + return PTR_ERR(phy); + + lane->priv = priv; + lane->phy = phy; + lane->id = i; + phy_set_drvdata(phy, lane); + lynx_28g_lane_read_configuration(lane); + } + + dev_set_drvdata(dev, priv); + + INIT_DELAYED_WORK(&priv->cdr_check, lynx_28g_cdr_lock_check); + + queue_delayed_work(system_power_efficient_wq, &priv->cdr_check, + msecs_to_jiffies(1000)); + + dev_set_drvdata(&pdev->dev, priv); + provider = devm_of_phy_provider_register(&pdev->dev, lynx_28g_xlate); + + return PTR_ERR_OR_ZERO(provider); +} + +static const struct of_device_id lynx_28g_of_match_table[] = { + { .compatible = "fsl,lynx-28g" }, + { }, +}; +MODULE_DEVICE_TABLE(of, lynx_28g_of_match_table); + +static struct platform_driver lynx_28g_driver = { + .probe = lynx_28g_probe, + .driver = { + .name = "lynx-28g", + .of_match_table = lynx_28g_of_match_table, + }, +}; +module_platform_driver(lynx_28g_driver); + +MODULE_AUTHOR("Ioana Ciornei <ioana.ciornei@nxp.com>"); +MODULE_DESCRIPTION("Lynx 28G SerDes PHY driver for Layerscape SoCs"); +MODULE_LICENSE("GPL v2"); |