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Date: Wed, 30 Aug 2017 13:39:47 +0200
From: Antoine Tenart <antoine.tenart@...e-electrons.com>
To: Kishon Vijay Abraham I <kishon@...com>
Cc: Antoine Tenart <antoine.tenart@...e-electrons.com>,
davem@...emloft.net, andrew@...n.ch, jason@...edaemon.net,
sebastian.hesselbarth@...il.com,
gregory.clement@...e-electrons.com,
thomas.petazzoni@...e-electrons.com, nadavh@...vell.com,
linux@...linux.org.uk, linux-kernel@...r.kernel.org,
mw@...ihalf.com, stefanc@...vell.com,
miquel.raynal@...e-electrons.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v4 02/13] phy: add the mvebu cp110 comphy driver
Hi Kishon,
On Wed, Aug 30, 2017 at 05:02:55PM +0530, Kishon Vijay Abraham I wrote:
> On Wednesday 30 August 2017 01:59 PM, Antoine Tenart wrote:
> > On the CP110 unit, which can be found on various Marvell platforms such
> > as the 7k and 8k (currently), a comphy (common PHYs) hardware block can
> > be found. This block provides a number of PHYs which can be used in
> > various modes by other controllers (network, SATA ...). These common
> > PHYs must be configured for the controllers using them to work correctly
> > either at boot time, or when the system runs to switch the mode used.
> > This patch adds a driver for this comphy hardware block, providing
> > callbacks for the its PHYs so that consumers can configure the modes
> > used.
> >
> > As of this commit, two modes are supported by the comphy driver: sgmii
> > and 10gkr.
> >
> > Signed-off-by: Antoine Tenart <antoine.tenart@...e-electrons.com>
>
> Acked-by: Kishon Vijay Abraham I <kishon@...com>
Thanks for the review!
@Dave: As stated by Kishon in the previous version of the series, the
two generic PHY patches can go through the net-next tree.
Thanks,
Antoine
> > ---
> > drivers/phy/marvell/Kconfig | 11 +
> > drivers/phy/marvell/Makefile | 1 +
> > drivers/phy/marvell/phy-mvebu-cp110-comphy.c | 644 +++++++++++++++++++++++++++
> > 3 files changed, 656 insertions(+)
> > create mode 100644 drivers/phy/marvell/phy-mvebu-cp110-comphy.c
> >
> > diff --git a/drivers/phy/marvell/Kconfig b/drivers/phy/marvell/Kconfig
> > index 048d8893bc2e..68e321225400 100644
> > --- a/drivers/phy/marvell/Kconfig
> > +++ b/drivers/phy/marvell/Kconfig
> > @@ -21,6 +21,17 @@ config PHY_BERLIN_USB
> > help
> > Enable this to support the USB PHY on Marvell Berlin SoCs.
> >
> > +config PHY_MVEBU_CP110_COMPHY
> > + tristate "Marvell CP110 comphy driver"
> > + depends on ARCH_MVEBU || COMPILE_TEST
> > + depends on OF
> > + select GENERIC_PHY
> > + help
> > + This driver allows to control the comphy, an hardware block providing
> > + shared serdes PHYs on Marvell Armada 7k/8k (in the CP110). Its serdes
> > + lanes can be used by various controllers (Ethernet, sata, usb,
> > + PCIe...).
> > +
> > config PHY_MVEBU_SATA
> > def_bool y
> > depends on ARCH_DOVE || MACH_DOVE || MACH_KIRKWOOD
> > diff --git a/drivers/phy/marvell/Makefile b/drivers/phy/marvell/Makefile
> > index 3fc188f59118..0cf6a7cbaf9f 100644
> > --- a/drivers/phy/marvell/Makefile
> > +++ b/drivers/phy/marvell/Makefile
> > @@ -1,6 +1,7 @@
> > obj-$(CONFIG_ARMADA375_USBCLUSTER_PHY) += phy-armada375-usb2.o
> > obj-$(CONFIG_PHY_BERLIN_SATA) += phy-berlin-sata.o
> > obj-$(CONFIG_PHY_BERLIN_USB) += phy-berlin-usb.o
> > +obj-$(CONFIG_PHY_MVEBU_CP110_COMPHY) += phy-mvebu-cp110-comphy.o
> > obj-$(CONFIG_PHY_MVEBU_SATA) += phy-mvebu-sata.o
> > obj-$(CONFIG_PHY_PXA_28NM_HSIC) += phy-pxa-28nm-hsic.o
> > obj-$(CONFIG_PHY_PXA_28NM_USB2) += phy-pxa-28nm-usb2.o
> > diff --git a/drivers/phy/marvell/phy-mvebu-cp110-comphy.c b/drivers/phy/marvell/phy-mvebu-cp110-comphy.c
> > new file mode 100644
> > index 000000000000..73ebad6634a7
> > --- /dev/null
> > +++ b/drivers/phy/marvell/phy-mvebu-cp110-comphy.c
> > @@ -0,0 +1,644 @@
> > +/*
> > + * Copyright (C) 2017 Marvell
> > + *
> > + * Antoine Tenart <antoine.tenart@...e-electrons.com>
> > + *
> > + * This file is licensed under the terms of the GNU General Public
> > + * License version 2. This program is licensed "as is" without any
> > + * warranty of any kind, whether express or implied.
> > + */
> > +
> > +#include <linux/io.h>
> > +#include <linux/iopoll.h>
> > +#include <linux/mfd/syscon.h>
> > +#include <linux/module.h>
> > +#include <linux/phy/phy.h>
> > +#include <linux/platform_device.h>
> > +#include <linux/regmap.h>
> > +
> > +/* Relative to priv->base */
> > +#define MVEBU_COMPHY_SERDES_CFG0(n) (0x0 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_SERDES_CFG0_PU_PLL BIT(1)
> > +#define MVEBU_COMPHY_SERDES_CFG0_GEN_RX(n) ((n) << 3)
> > +#define MVEBU_COMPHY_SERDES_CFG0_GEN_TX(n) ((n) << 7)
> > +#define MVEBU_COMPHY_SERDES_CFG0_PU_RX BIT(11)
> > +#define MVEBU_COMPHY_SERDES_CFG0_PU_TX BIT(12)
> > +#define MVEBU_COMPHY_SERDES_CFG0_HALF_BUS BIT(14)
> > +#define MVEBU_COMPHY_SERDES_CFG1(n) (0x4 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_SERDES_CFG1_RESET BIT(3)
> > +#define MVEBU_COMPHY_SERDES_CFG1_RX_INIT BIT(4)
> > +#define MVEBU_COMPHY_SERDES_CFG1_CORE_RESET BIT(5)
> > +#define MVEBU_COMPHY_SERDES_CFG1_RF_RESET BIT(6)
> > +#define MVEBU_COMPHY_SERDES_CFG2(n) (0x8 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_SERDES_CFG2_DFE_EN BIT(4)
> > +#define MVEBU_COMPHY_SERDES_STATUS0(n) (0x18 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_SERDES_STATUS0_TX_PLL_RDY BIT(2)
> > +#define MVEBU_COMPHY_SERDES_STATUS0_RX_PLL_RDY BIT(3)
> > +#define MVEBU_COMPHY_SERDES_STATUS0_RX_INIT BIT(4)
> > +#define MVEBU_COMPHY_PWRPLL_CTRL(n) (0x804 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_PWRPLL_CTRL_RFREQ(n) ((n) << 0)
> > +#define MVEBU_COMPHY_PWRPLL_PHY_MODE(n) ((n) << 5)
> > +#define MVEBU_COMPHY_IMP_CAL(n) (0x80c + (n) * 0x1000)
> > +#define MVEBU_COMPHY_IMP_CAL_TX_EXT(n) ((n) << 10)
> > +#define MVEBU_COMPHY_IMP_CAL_TX_EXT_EN BIT(15)
> > +#define MVEBU_COMPHY_DFE_RES(n) (0x81c + (n) * 0x1000)
> > +#define MVEBU_COMPHY_DFE_RES_FORCE_GEN_TBL BIT(15)
> > +#define MVEBU_COMPHY_COEF(n) (0x828 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_COEF_DFE_EN BIT(14)
> > +#define MVEBU_COMPHY_COEF_DFE_CTRL BIT(15)
> > +#define MVEBU_COMPHY_GEN1_S0(n) (0x834 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_GEN1_S0_TX_AMP(n) ((n) << 1)
> > +#define MVEBU_COMPHY_GEN1_S0_TX_EMPH(n) ((n) << 7)
> > +#define MVEBU_COMPHY_GEN1_S1(n) (0x838 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_GEN1_S1_RX_MUL_PI(n) ((n) << 0)
> > +#define MVEBU_COMPHY_GEN1_S1_RX_MUL_PF(n) ((n) << 3)
> > +#define MVEBU_COMPHY_GEN1_S1_RX_MUL_FI(n) ((n) << 6)
> > +#define MVEBU_COMPHY_GEN1_S1_RX_MUL_FF(n) ((n) << 8)
> > +#define MVEBU_COMPHY_GEN1_S1_RX_DFE_EN BIT(10)
> > +#define MVEBU_COMPHY_GEN1_S1_RX_DIV(n) ((n) << 11)
> > +#define MVEBU_COMPHY_GEN1_S2(n) (0x8f4 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_GEN1_S2_TX_EMPH(n) ((n) << 0)
> > +#define MVEBU_COMPHY_GEN1_S2_TX_EMPH_EN BIT(4)
> > +#define MVEBU_COMPHY_LOOPBACK(n) (0x88c + (n) * 0x1000)
> > +#define MVEBU_COMPHY_LOOPBACK_DBUS_WIDTH(n) ((n) << 1)
> > +#define MVEBU_COMPHY_VDD_CAL0(n) (0x908 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_VDD_CAL0_CONT_MODE BIT(15)
> > +#define MVEBU_COMPHY_EXT_SELV(n) (0x914 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_EXT_SELV_RX_SAMPL(n) ((n) << 5)
> > +#define MVEBU_COMPHY_MISC_CTRL0(n) (0x93c + (n) * 0x1000)
> > +#define MVEBU_COMPHY_MISC_CTRL0_ICP_FORCE BIT(5)
> > +#define MVEBU_COMPHY_MISC_CTRL0_REFCLK_SEL BIT(10)
> > +#define MVEBU_COMPHY_RX_CTRL1(n) (0x940 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_RX_CTRL1_RXCLK2X_SEL BIT(11)
> > +#define MVEBU_COMPHY_RX_CTRL1_CLK8T_EN BIT(12)
> > +#define MVEBU_COMPHY_SPEED_DIV(n) (0x954 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_SPEED_DIV_TX_FORCE BIT(7)
> > +#define MVEBU_SP_CALIB(n) (0x96c + (n) * 0x1000)
> > +#define MVEBU_SP_CALIB_SAMPLER(n) ((n) << 8)
> > +#define MVEBU_SP_CALIB_SAMPLER_EN BIT(12)
> > +#define MVEBU_COMPHY_TX_SLEW_RATE(n) (0x974 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_TX_SLEW_RATE_EMPH(n) ((n) << 5)
> > +#define MVEBU_COMPHY_TX_SLEW_RATE_SLC(n) ((n) << 10)
> > +#define MVEBU_COMPHY_DLT_CTRL(n) (0x984 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_DLT_CTRL_DTL_FLOOP_EN BIT(2)
> > +#define MVEBU_COMPHY_FRAME_DETECT0(n) (0xa14 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_FRAME_DETECT0_PATN(n) ((n) << 7)
> > +#define MVEBU_COMPHY_FRAME_DETECT3(n) (0xa20 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_FRAME_DETECT3_LOST_TIMEOUT_EN BIT(12)
> > +#define MVEBU_COMPHY_DME(n) (0xa28 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_DME_ETH_MODE BIT(7)
> > +#define MVEBU_COMPHY_TRAINING0(n) (0xa68 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_TRAINING0_P2P_HOLD BIT(15)
> > +#define MVEBU_COMPHY_TRAINING5(n) (0xaa4 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_TRAINING5_RX_TIMER(n) ((n) << 0)
> > +#define MVEBU_COMPHY_TX_TRAIN_PRESET(n) (0xb1c + (n) * 0x1000)
> > +#define MVEBU_COMPHY_TX_TRAIN_PRESET_16B_AUTO_EN BIT(8)
> > +#define MVEBU_COMPHY_TX_TRAIN_PRESET_PRBS11 BIT(9)
> > +#define MVEBU_COMPHY_GEN1_S3(n) (0xc40 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_GEN1_S3_FBCK_SEL BIT(9)
> > +#define MVEBU_COMPHY_GEN1_S4(n) (0xc44 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_GEN1_S4_DFE_RES(n) ((n) << 8)
> > +#define MVEBU_COMPHY_TX_PRESET(n) (0xc68 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_TX_PRESET_INDEX(n) ((n) << 0)
> > +#define MVEBU_COMPHY_GEN1_S5(n) (0xd38 + (n) * 0x1000)
> > +#define MVEBU_COMPHY_GEN1_S5_ICP(n) ((n) << 0)
> > +
> > +/* Relative to priv->regmap */
> > +#define MVEBU_COMPHY_CONF1(n) (0x1000 + (n) * 0x28)
> > +#define MVEBU_COMPHY_CONF1_PWRUP BIT(1)
> > +#define MVEBU_COMPHY_CONF1_USB_PCIE BIT(2) /* 0: Ethernet/SATA */
> > +#define MVEBU_COMPHY_CONF6(n) (0x1014 + (n) * 0x28)
> > +#define MVEBU_COMPHY_CONF6_40B BIT(18)
> > +#define MVEBU_COMPHY_SELECTOR 0x1140
> > +#define MVEBU_COMPHY_SELECTOR_PHY(n) ((n) * 0x4)
> > +
> > +#define MVEBU_COMPHY_LANES 6
> > +#define MVEBU_COMPHY_PORTS 3
> > +
> > +struct mvebu_comhy_conf {
> > + enum phy_mode mode;
> > + unsigned lane;
> > + unsigned port;
> > + u32 mux;
> > +};
> > +
> > +#define MVEBU_COMPHY_CONF(_lane, _port, _mode, _mux) \
> > + { \
> > + .lane = _lane, \
> > + .port = _port, \
> > + .mode = _mode, \
> > + .mux = _mux, \
> > + }
> > +
> > +static const struct mvebu_comhy_conf mvebu_comphy_cp110_modes[] = {
> > + /* lane 0 */
> > + MVEBU_COMPHY_CONF(0, 1, PHY_MODE_SGMII, 0x1),
> > + /* lane 1 */
> > + MVEBU_COMPHY_CONF(1, 2, PHY_MODE_SGMII, 0x1),
> > + /* lane 2 */
> > + MVEBU_COMPHY_CONF(2, 0, PHY_MODE_SGMII, 0x1),
> > + MVEBU_COMPHY_CONF(2, 0, PHY_MODE_10GKR, 0x1),
> > + /* lane 3 */
> > + MVEBU_COMPHY_CONF(3, 1, PHY_MODE_SGMII, 0x2),
> > + /* lane 4 */
> > + MVEBU_COMPHY_CONF(4, 0, PHY_MODE_SGMII, 0x2),
> > + MVEBU_COMPHY_CONF(4, 0, PHY_MODE_10GKR, 0x2),
> > + MVEBU_COMPHY_CONF(4, 1, PHY_MODE_SGMII, 0x1),
> > + /* lane 5 */
> > + MVEBU_COMPHY_CONF(5, 2, PHY_MODE_SGMII, 0x1),
> > +};
> > +
> > +struct mvebu_comphy_priv {
> > + void __iomem *base;
> > + struct regmap *regmap;
> > + struct device *dev;
> > + int modes[MVEBU_COMPHY_LANES];
> > +};
> > +
> > +struct mvebu_comphy_lane {
> > + struct mvebu_comphy_priv *priv;
> > + unsigned id;
> > + enum phy_mode mode;
> > + int port;
> > +};
> > +
> > +static int mvebu_comphy_get_mux(int lane, int port, enum phy_mode mode)
> > +{
> > + int i, n = ARRAY_SIZE(mvebu_comphy_cp110_modes);
> > +
> > + /* Unused PHY mux value is 0x0 */
> > + if (mode == PHY_MODE_INVALID)
> > + return 0;
> > +
> > + for (i = 0; i < n; i++) {
> > + if (mvebu_comphy_cp110_modes[i].lane == lane &&
> > + mvebu_comphy_cp110_modes[i].port == port &&
> > + mvebu_comphy_cp110_modes[i].mode == mode)
> > + break;
> > + }
> > +
> > + if (i == n)
> > + return -EINVAL;
> > +
> > + return mvebu_comphy_cp110_modes[i].mux;
> > +}
> > +
> > +static void mvebu_comphy_ethernet_init_reset(struct mvebu_comphy_lane *lane,
> > + enum phy_mode mode)
> > +{
> > + struct mvebu_comphy_priv *priv = lane->priv;
> > + u32 val;
> > +
> > + regmap_read(priv->regmap, MVEBU_COMPHY_CONF1(lane->id), &val);
> > + val &= ~MVEBU_COMPHY_CONF1_USB_PCIE;
> > + val |= MVEBU_COMPHY_CONF1_PWRUP;
> > + regmap_write(priv->regmap, MVEBU_COMPHY_CONF1(lane->id), val);
> > +
> > + /* Select baud rates and PLLs */
> > + val = readl(priv->base + MVEBU_COMPHY_SERDES_CFG0(lane->id));
> > + val &= ~(MVEBU_COMPHY_SERDES_CFG0_PU_PLL |
> > + MVEBU_COMPHY_SERDES_CFG0_PU_RX |
> > + MVEBU_COMPHY_SERDES_CFG0_PU_TX |
> > + MVEBU_COMPHY_SERDES_CFG0_HALF_BUS |
> > + MVEBU_COMPHY_SERDES_CFG0_GEN_RX(0xf) |
> > + MVEBU_COMPHY_SERDES_CFG0_GEN_TX(0xf));
> > + if (mode == PHY_MODE_10GKR)
> > + val |= MVEBU_COMPHY_SERDES_CFG0_GEN_RX(0xe) |
> > + MVEBU_COMPHY_SERDES_CFG0_GEN_TX(0xe);
> > + else if (mode == PHY_MODE_SGMII)
> > + val |= MVEBU_COMPHY_SERDES_CFG0_GEN_RX(0x6) |
> > + MVEBU_COMPHY_SERDES_CFG0_GEN_TX(0x6) |
> > + MVEBU_COMPHY_SERDES_CFG0_HALF_BUS;
> > + writel(val, priv->base + MVEBU_COMPHY_SERDES_CFG0(lane->id));
> > +
> > + /* reset */
> > + val = readl(priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > + val &= ~(MVEBU_COMPHY_SERDES_CFG1_RESET |
> > + MVEBU_COMPHY_SERDES_CFG1_CORE_RESET |
> > + MVEBU_COMPHY_SERDES_CFG1_RF_RESET);
> > + writel(val, priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > +
> > + /* de-assert reset */
> > + val = readl(priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > + val |= MVEBU_COMPHY_SERDES_CFG1_RESET |
> > + MVEBU_COMPHY_SERDES_CFG1_CORE_RESET;
> > + writel(val, priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > +
> > + /* wait until clocks are ready */
> > + mdelay(1);
> > +
> > + /* exlicitly disable 40B, the bits isn't clear on reset */
> > + regmap_read(priv->regmap, MVEBU_COMPHY_CONF6(lane->id), &val);
> > + val &= ~MVEBU_COMPHY_CONF6_40B;
> > + regmap_write(priv->regmap, MVEBU_COMPHY_CONF6(lane->id), val);
> > +
> > + /* refclk selection */
> > + val = readl(priv->base + MVEBU_COMPHY_MISC_CTRL0(lane->id));
> > + val &= ~MVEBU_COMPHY_MISC_CTRL0_REFCLK_SEL;
> > + if (mode == PHY_MODE_10GKR)
> > + val |= MVEBU_COMPHY_MISC_CTRL0_ICP_FORCE;
> > + writel(val, priv->base + MVEBU_COMPHY_MISC_CTRL0(lane->id));
> > +
> > + /* power and pll selection */
> > + val = readl(priv->base + MVEBU_COMPHY_PWRPLL_CTRL(lane->id));
> > + val &= ~(MVEBU_COMPHY_PWRPLL_CTRL_RFREQ(0x1f) |
> > + MVEBU_COMPHY_PWRPLL_PHY_MODE(0x7));
> > + val |= MVEBU_COMPHY_PWRPLL_CTRL_RFREQ(0x1) |
> > + MVEBU_COMPHY_PWRPLL_PHY_MODE(0x4);
> > + writel(val, priv->base + MVEBU_COMPHY_PWRPLL_CTRL(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_LOOPBACK(lane->id));
> > + val &= ~MVEBU_COMPHY_LOOPBACK_DBUS_WIDTH(0x7);
> > + val |= MVEBU_COMPHY_LOOPBACK_DBUS_WIDTH(0x1);
> > + writel(val, priv->base + MVEBU_COMPHY_LOOPBACK(lane->id));
> > +}
> > +
> > +static int mvebu_comphy_init_plls(struct mvebu_comphy_lane *lane,
> > + enum phy_mode mode)
> > +{
> > + struct mvebu_comphy_priv *priv = lane->priv;
> > + u32 val;
> > +
> > + /* SERDES external config */
> > + val = readl(priv->base + MVEBU_COMPHY_SERDES_CFG0(lane->id));
> > + val |= MVEBU_COMPHY_SERDES_CFG0_PU_PLL |
> > + MVEBU_COMPHY_SERDES_CFG0_PU_RX |
> > + MVEBU_COMPHY_SERDES_CFG0_PU_TX;
> > + writel(val, priv->base + MVEBU_COMPHY_SERDES_CFG0(lane->id));
> > +
> > + /* check rx/tx pll */
> > + readl_poll_timeout(priv->base + MVEBU_COMPHY_SERDES_STATUS0(lane->id),
> > + val,
> > + val & (MVEBU_COMPHY_SERDES_STATUS0_RX_PLL_RDY |
> > + MVEBU_COMPHY_SERDES_STATUS0_TX_PLL_RDY),
> > + 1000, 150000);
> > + if (!(val & (MVEBU_COMPHY_SERDES_STATUS0_RX_PLL_RDY |
> > + MVEBU_COMPHY_SERDES_STATUS0_TX_PLL_RDY)))
> > + return -ETIMEDOUT;
> > +
> > + /* rx init */
> > + val = readl(priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > + val |= MVEBU_COMPHY_SERDES_CFG1_RX_INIT;
> > + writel(val, priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > +
> > + /* check rx */
> > + readl_poll_timeout(priv->base + MVEBU_COMPHY_SERDES_STATUS0(lane->id),
> > + val, val & MVEBU_COMPHY_SERDES_STATUS0_RX_INIT,
> > + 1000, 10000);
> > + if (!(val & MVEBU_COMPHY_SERDES_STATUS0_RX_INIT))
> > + return -ETIMEDOUT;
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > + val &= ~MVEBU_COMPHY_SERDES_CFG1_RX_INIT;
> > + writel(val, priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > +
> > + return 0;
> > +}
> > +
> > +static int mvebu_comphy_set_mode_sgmii(struct phy *phy)
> > +{
> > + struct mvebu_comphy_lane *lane = phy_get_drvdata(phy);
> > + struct mvebu_comphy_priv *priv = lane->priv;
> > + u32 val;
> > +
> > + mvebu_comphy_ethernet_init_reset(lane, PHY_MODE_SGMII);
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_RX_CTRL1(lane->id));
> > + val &= ~MVEBU_COMPHY_RX_CTRL1_CLK8T_EN;
> > + val |= MVEBU_COMPHY_RX_CTRL1_RXCLK2X_SEL;
> > + writel(val, priv->base + MVEBU_COMPHY_RX_CTRL1(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_DLT_CTRL(lane->id));
> > + val &= ~MVEBU_COMPHY_DLT_CTRL_DTL_FLOOP_EN;
> > + writel(val, priv->base + MVEBU_COMPHY_DLT_CTRL(lane->id));
> > +
> > + regmap_read(priv->regmap, MVEBU_COMPHY_CONF1(lane->id), &val);
> > + val &= ~MVEBU_COMPHY_CONF1_USB_PCIE;
> > + val |= MVEBU_COMPHY_CONF1_PWRUP;
> > + regmap_write(priv->regmap, MVEBU_COMPHY_CONF1(lane->id), val);
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_GEN1_S0(lane->id));
> > + val &= ~MVEBU_COMPHY_GEN1_S0_TX_EMPH(0xf);
> > + val |= MVEBU_COMPHY_GEN1_S0_TX_EMPH(0x1);
> > + writel(val, priv->base + MVEBU_COMPHY_GEN1_S0(lane->id));
> > +
> > + return mvebu_comphy_init_plls(lane, PHY_MODE_SGMII);
> > +}
> > +
> > +static int mvebu_comphy_set_mode_10gkr(struct phy *phy)
> > +{
> > + struct mvebu_comphy_lane *lane = phy_get_drvdata(phy);
> > + struct mvebu_comphy_priv *priv = lane->priv;
> > + u32 val;
> > +
> > + mvebu_comphy_ethernet_init_reset(lane, PHY_MODE_10GKR);
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_RX_CTRL1(lane->id));
> > + val |= MVEBU_COMPHY_RX_CTRL1_RXCLK2X_SEL |
> > + MVEBU_COMPHY_RX_CTRL1_CLK8T_EN;
> > + writel(val, priv->base + MVEBU_COMPHY_RX_CTRL1(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_DLT_CTRL(lane->id));
> > + val |= MVEBU_COMPHY_DLT_CTRL_DTL_FLOOP_EN;
> > + writel(val, priv->base + MVEBU_COMPHY_DLT_CTRL(lane->id));
> > +
> > + /* Speed divider */
> > + val = readl(priv->base + MVEBU_COMPHY_SPEED_DIV(lane->id));
> > + val |= MVEBU_COMPHY_SPEED_DIV_TX_FORCE;
> > + writel(val, priv->base + MVEBU_COMPHY_SPEED_DIV(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_SERDES_CFG2(lane->id));
> > + val |= MVEBU_COMPHY_SERDES_CFG2_DFE_EN;
> > + writel(val, priv->base + MVEBU_COMPHY_SERDES_CFG2(lane->id));
> > +
> > + /* DFE resolution */
> > + val = readl(priv->base + MVEBU_COMPHY_DFE_RES(lane->id));
> > + val |= MVEBU_COMPHY_DFE_RES_FORCE_GEN_TBL;
> > + writel(val, priv->base + MVEBU_COMPHY_DFE_RES(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_GEN1_S0(lane->id));
> > + val &= ~(MVEBU_COMPHY_GEN1_S0_TX_AMP(0x1f) |
> > + MVEBU_COMPHY_GEN1_S0_TX_EMPH(0xf));
> > + val |= MVEBU_COMPHY_GEN1_S0_TX_AMP(0x1c) |
> > + MVEBU_COMPHY_GEN1_S0_TX_EMPH(0xe);
> > + writel(val, priv->base + MVEBU_COMPHY_GEN1_S0(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_GEN1_S2(lane->id));
> > + val &= ~MVEBU_COMPHY_GEN1_S2_TX_EMPH(0xf);
> > + val |= MVEBU_COMPHY_GEN1_S2_TX_EMPH_EN;
> > + writel(val, priv->base + MVEBU_COMPHY_GEN1_S2(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_TX_SLEW_RATE(lane->id));
> > + val |= MVEBU_COMPHY_TX_SLEW_RATE_EMPH(0x3) |
> > + MVEBU_COMPHY_TX_SLEW_RATE_SLC(0x3f);
> > + writel(val, priv->base + MVEBU_COMPHY_TX_SLEW_RATE(lane->id));
> > +
> > + /* Impedance calibration */
> > + val = readl(priv->base + MVEBU_COMPHY_IMP_CAL(lane->id));
> > + val &= ~MVEBU_COMPHY_IMP_CAL_TX_EXT(0x1f);
> > + val |= MVEBU_COMPHY_IMP_CAL_TX_EXT(0xe) |
> > + MVEBU_COMPHY_IMP_CAL_TX_EXT_EN;
> > + writel(val, priv->base + MVEBU_COMPHY_IMP_CAL(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_GEN1_S5(lane->id));
> > + val &= ~MVEBU_COMPHY_GEN1_S5_ICP(0xf);
> > + writel(val, priv->base + MVEBU_COMPHY_GEN1_S5(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_GEN1_S1(lane->id));
> > + val &= ~(MVEBU_COMPHY_GEN1_S1_RX_MUL_PI(0x7) |
> > + MVEBU_COMPHY_GEN1_S1_RX_MUL_PF(0x7) |
> > + MVEBU_COMPHY_GEN1_S1_RX_MUL_FI(0x3) |
> > + MVEBU_COMPHY_GEN1_S1_RX_MUL_FF(0x3));
> > + val |= MVEBU_COMPHY_GEN1_S1_RX_DFE_EN |
> > + MVEBU_COMPHY_GEN1_S1_RX_MUL_PI(0x2) |
> > + MVEBU_COMPHY_GEN1_S1_RX_MUL_PF(0x2) |
> > + MVEBU_COMPHY_GEN1_S1_RX_MUL_FF(0x1) |
> > + MVEBU_COMPHY_GEN1_S1_RX_DIV(0x3);
> > + writel(val, priv->base + MVEBU_COMPHY_GEN1_S1(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_COEF(lane->id));
> > + val &= ~(MVEBU_COMPHY_COEF_DFE_EN | MVEBU_COMPHY_COEF_DFE_CTRL);
> > + writel(val, priv->base + MVEBU_COMPHY_COEF(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_GEN1_S4(lane->id));
> > + val &= ~MVEBU_COMPHY_GEN1_S4_DFE_RES(0x3);
> > + val |= MVEBU_COMPHY_GEN1_S4_DFE_RES(0x1);
> > + writel(val, priv->base + MVEBU_COMPHY_GEN1_S4(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_GEN1_S3(lane->id));
> > + val |= MVEBU_COMPHY_GEN1_S3_FBCK_SEL;
> > + writel(val, priv->base + MVEBU_COMPHY_GEN1_S3(lane->id));
> > +
> > + /* rx training timer */
> > + val = readl(priv->base + MVEBU_COMPHY_TRAINING5(lane->id));
> > + val &= ~MVEBU_COMPHY_TRAINING5_RX_TIMER(0x3ff);
> > + val |= MVEBU_COMPHY_TRAINING5_RX_TIMER(0x13);
> > + writel(val, priv->base + MVEBU_COMPHY_TRAINING5(lane->id));
> > +
> > + /* tx train peak to peak hold */
> > + val = readl(priv->base + MVEBU_COMPHY_TRAINING0(lane->id));
> > + val |= MVEBU_COMPHY_TRAINING0_P2P_HOLD;
> > + writel(val, priv->base + MVEBU_COMPHY_TRAINING0(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_TX_PRESET(lane->id));
> > + val &= ~MVEBU_COMPHY_TX_PRESET_INDEX(0xf);
> > + val |= MVEBU_COMPHY_TX_PRESET_INDEX(0x2); /* preset coeff */
> > + writel(val, priv->base + MVEBU_COMPHY_TX_PRESET(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_FRAME_DETECT3(lane->id));
> > + val &= ~MVEBU_COMPHY_FRAME_DETECT3_LOST_TIMEOUT_EN;
> > + writel(val, priv->base + MVEBU_COMPHY_FRAME_DETECT3(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_TX_TRAIN_PRESET(lane->id));
> > + val |= MVEBU_COMPHY_TX_TRAIN_PRESET_16B_AUTO_EN |
> > + MVEBU_COMPHY_TX_TRAIN_PRESET_PRBS11;
> > + writel(val, priv->base + MVEBU_COMPHY_TX_TRAIN_PRESET(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_FRAME_DETECT0(lane->id));
> > + val &= ~MVEBU_COMPHY_FRAME_DETECT0_PATN(0x1ff);
> > + val |= MVEBU_COMPHY_FRAME_DETECT0_PATN(0x88);
> > + writel(val, priv->base + MVEBU_COMPHY_FRAME_DETECT0(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_DME(lane->id));
> > + val |= MVEBU_COMPHY_DME_ETH_MODE;
> > + writel(val, priv->base + MVEBU_COMPHY_DME(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_VDD_CAL0(lane->id));
> > + val |= MVEBU_COMPHY_VDD_CAL0_CONT_MODE;
> > + writel(val, priv->base + MVEBU_COMPHY_VDD_CAL0(lane->id));
> > +
> > + val = readl(priv->base + MVEBU_SP_CALIB(lane->id));
> > + val &= ~MVEBU_SP_CALIB_SAMPLER(0x3);
> > + val |= MVEBU_SP_CALIB_SAMPLER(0x3) |
> > + MVEBU_SP_CALIB_SAMPLER_EN;
> > + writel(val, priv->base + MVEBU_SP_CALIB(lane->id));
> > + val &= ~MVEBU_SP_CALIB_SAMPLER_EN;
> > + writel(val, priv->base + MVEBU_SP_CALIB(lane->id));
> > +
> > + /* External rx regulator */
> > + val = readl(priv->base + MVEBU_COMPHY_EXT_SELV(lane->id));
> > + val &= ~MVEBU_COMPHY_EXT_SELV_RX_SAMPL(0x1f);
> > + val |= MVEBU_COMPHY_EXT_SELV_RX_SAMPL(0x1a);
> > + writel(val, priv->base + MVEBU_COMPHY_EXT_SELV(lane->id));
> > +
> > + return mvebu_comphy_init_plls(lane, PHY_MODE_10GKR);
> > +}
> > +
> > +static int mvebu_comphy_power_on(struct phy *phy)
> > +{
> > + struct mvebu_comphy_lane *lane = phy_get_drvdata(phy);
> > + struct mvebu_comphy_priv *priv = lane->priv;
> > + int ret;
> > + u32 mux, val;
> > +
> > + mux = mvebu_comphy_get_mux(lane->id, lane->port, lane->mode);
> > + if (mux < 0)
> > + return -ENOTSUPP;
> > +
> > + regmap_read(priv->regmap, MVEBU_COMPHY_SELECTOR, &val);
> > + val &= ~(0xf << MVEBU_COMPHY_SELECTOR_PHY(lane->id));
> > + val |= mux << MVEBU_COMPHY_SELECTOR_PHY(lane->id);
> > + regmap_write(priv->regmap, MVEBU_COMPHY_SELECTOR, val);
> > +
> > + switch (lane->mode) {
> > + case PHY_MODE_SGMII:
> > + ret = mvebu_comphy_set_mode_sgmii(phy);
> > + break;
> > + case PHY_MODE_10GKR:
> > + ret = mvebu_comphy_set_mode_10gkr(phy);
> > + break;
> > + default:
> > + return -ENOTSUPP;
> > + }
> > +
> > + /* digital reset */
> > + val = readl(priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > + val |= MVEBU_COMPHY_SERDES_CFG1_RF_RESET;
> > + writel(val, priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > +
> > + return ret;
> > +}
> > +
> > +static int mvebu_comphy_set_mode(struct phy *phy, enum phy_mode mode)
> > +{
> > + struct mvebu_comphy_lane *lane = phy_get_drvdata(phy);
> > +
> > + if (mvebu_comphy_get_mux(lane->id, lane->port, mode) < 0)
> > + return -EINVAL;
> > +
> > + lane->mode = mode;
> > + return 0;
> > +}
> > +
> > +static int mvebu_comphy_power_off(struct phy *phy)
> > +{
> > + struct mvebu_comphy_lane *lane = phy_get_drvdata(phy);
> > + struct mvebu_comphy_priv *priv = lane->priv;
> > + u32 val;
> > +
> > + val = readl(priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > + val &= ~(MVEBU_COMPHY_SERDES_CFG1_RESET |
> > + MVEBU_COMPHY_SERDES_CFG1_CORE_RESET |
> > + MVEBU_COMPHY_SERDES_CFG1_RF_RESET);
> > + writel(val, priv->base + MVEBU_COMPHY_SERDES_CFG1(lane->id));
> > +
> > + regmap_read(priv->regmap, MVEBU_COMPHY_SELECTOR, &val);
> > + val &= ~(0xf << MVEBU_COMPHY_SELECTOR_PHY(lane->id));
> > + regmap_write(priv->regmap, MVEBU_COMPHY_SELECTOR, val);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct phy_ops mvebu_comphy_ops = {
> > + .power_on = mvebu_comphy_power_on,
> > + .power_off = mvebu_comphy_power_off,
> > + .set_mode = mvebu_comphy_set_mode,
> > + .owner = THIS_MODULE,
> > +};
> > +
> > +static struct phy *mvebu_comphy_xlate(struct device *dev,
> > + struct of_phandle_args *args)
> > +{
> > + struct mvebu_comphy_lane *lane;
> > + struct phy *phy;
> > +
> > + if (WARN_ON(args->args[0] >= MVEBU_COMPHY_PORTS))
> > + return ERR_PTR(-EINVAL);
> > +
> > + phy = of_phy_simple_xlate(dev, args);
> > + if (IS_ERR(phy))
> > + return phy;
> > +
> > + lane = phy_get_drvdata(phy);
> > + if (lane->port >= 0)
> > + return ERR_PTR(-EBUSY);
> > + lane->port = args->args[0];
> > +
> > + return phy;
> > +}
> > +
> > +static int mvebu_comphy_probe(struct platform_device *pdev)
> > +{
> > + struct mvebu_comphy_priv *priv;
> > + struct phy_provider *provider;
> > + struct device_node *child;
> > + struct resource *res;
> > +
> > + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
> > + if (!priv)
> > + return -ENOMEM;
> > +
> > + priv->dev = &pdev->dev;
> > + priv->regmap =
> > + syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
> > + "marvell,system-controller");
> > + if (IS_ERR(priv->regmap))
> > + return PTR_ERR(priv->regmap);
> > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > + priv->base = devm_ioremap_resource(&pdev->dev, res);
> > + if (!priv->base)
> > + return -ENOMEM;
> > +
> > + for_each_available_child_of_node(pdev->dev.of_node, child) {
> > + struct mvebu_comphy_lane *lane;
> > + struct phy *phy;
> > + int ret;
> > + u32 val;
> > +
> > + ret = of_property_read_u32(child, "reg", &val);
> > + if (ret < 0) {
> > + dev_err(&pdev->dev, "missing 'reg' property (%d)\n",
> > + ret);
> > + continue;
> > + }
> > +
> > + if (val >= MVEBU_COMPHY_LANES) {
> > + dev_err(&pdev->dev, "invalid 'reg' property\n");
> > + continue;
> > + }
> > +
> > + lane = devm_kzalloc(&pdev->dev, sizeof(*lane), GFP_KERNEL);
> > + if (!lane)
> > + return -ENOMEM;
> > +
> > + phy = devm_phy_create(&pdev->dev, child, &mvebu_comphy_ops);
> > + if (IS_ERR(phy))
> > + return PTR_ERR(phy);
> > +
> > + lane->priv = priv;
> > + lane->mode = PHY_MODE_INVALID;
> > + lane->id = val;
> > + lane->port = -1;
> > + phy_set_drvdata(phy, lane);
> > +
> > + /*
> > + * Once all modes are supported in this driver we should call
> > + * mvebu_comphy_power_off(phy) here to avoid relying on the
> > + * bootloader/firmware configuration.
> > + */
> > + }
> > +
> > + dev_set_drvdata(&pdev->dev, priv);
> > + provider = devm_of_phy_provider_register(&pdev->dev,
> > + mvebu_comphy_xlate);
> > + return PTR_ERR_OR_ZERO(provider);
> > +}
> > +
> > +static const struct of_device_id mvebu_comphy_of_match_table[] = {
> > + { .compatible = "marvell,comphy-cp110" },
> > + { },
> > +};
> > +MODULE_DEVICE_TABLE(of, mvebu_comphy_of_match_table);
> > +
> > +static struct platform_driver mvebu_comphy_driver = {
> > + .probe = mvebu_comphy_probe,
> > + .driver = {
> > + .name = "mvebu-comphy",
> > + .of_match_table = mvebu_comphy_of_match_table,
> > + },
> > +};
> > +module_platform_driver(mvebu_comphy_driver);
> > +
> > +MODULE_AUTHOR("Antoine Tenart <antoine.tenart@...e-electrons.com>");
> > +MODULE_DESCRIPTION("Common PHY driver for mvebu SoCs");
> > +MODULE_LICENSE("GPL v2");
> >
--
Antoine Ténart, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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