[PATCH v1 1/2] phy: keystone: serdes driver for gbe 10gbe and pcie

WingMan Kwok
2015-10-15T14:27:40Z

On TI's Keystone platforms, several peripherals such as the
gbe ethernet switch, 10gbe ethernet switch and PCIe controller
require the use of a SerDes for converting SoC parallel data into
serialized data that can be output over a high-speed electrical
interface, and also converting high-speed serial input data
into parallel data that can be processed by the SoC. The
SerDeses used by those peripherals, though they may be different,
are largely similar in functionality and setup.

This patch provides a SerDes phy driver implementation that can be
used by the above mentioned peripheral drivers to configure their
respective SerDeses.

v1:
- see cover letter for review comments addressed.

Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
---
Documentation/devicetree/bindings/phy/ti-phy.txt | 278 +++
drivers/phy/Kconfig | 8 +
drivers/phy/Makefile | 1 +
drivers/phy/phy-keystone-serdes.c | 2373 ++++++++++++++++++++++
4 files changed, 2660 insertions(+)
create mode 100644 drivers/phy/phy-keystone-serdes.c

diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt b/Documentation/devicetree/bindings/phy/ti-phy.txt
index 9cf9446..4dca271 100644
--- a/Documentation/devicetree/bindings/phy/ti-phy.txt
+++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
@@ -115,4 +115,282 @@ sata_phy: phy@4A096000 {
clock-names = "sysclk", "refclk";
syscon-pllreset = <&scm_conf 0x3fc>;
#phy-cells = <0>;
+
+TI Keystone SerDes PHY
+======================
+
+Required properties:
+ - compatible: should be one of
+ * "ti,keystone-serdes-gbe"
+ * "ti,keystone-serdes-xgbe"
+ * "ti,keystone-serdes-pcie"
+ - reg:
+ * base address and length of the SerDes register set
+ - reg-names:
+ * "serdes"
+ - name of the reg SerDes register set
+ - #phy-cells:
+ * From the generic phy bindings, must be 0;
+ - num-lanes:
+ * Number of lanes in SerDes.
+
+Optional properties:
+ - syscon-peripheral:
+ * Handle to the subsystem register region of the peripheral
+ inside which the SerDes exists.
+ - syscon-link:
+ * Handle to the Link register region of the peripheral inside
+ which the SerDes exists. Example: it is the PCSR register
+ region in the case of 10gbe.
+ - rx-force-enable:
+ * Include this property if receiver attenuation and boost are
+ to be configured with specific values defined in rx-force.
+ - link-rate-kbps:
+ * SerDes link rate to be configured, in kbps.
+
+
+For gbe and 10gbe SerDes, it is optional to represent each lane as
+a sub-node, which can be enabled or disabled individually using
+the "status" property.
+
+Required properties (lane sub-node):
+ - reg:
+ * lane number
+
+Optional properties (lane sub-node):
+ - control-rate:
+ * Lane control rate
+ 0: full rate
+ 1: half rate
+ 2: quarter rate
+ - rx-start:
+ * Initial lane rx equalizer attenuation and boost configurations.
+ * Must be array of 2 integers.
+ - rx-force:
+ * Forced lane rx equalizer attenuation and boost configurations.
+ * Must be array of 2 integers.
+ - tx-coeff:
+ * Lane c1, c2, cm, attenuation and regulator output voltage
+ configurations.
+ * Must be array of 5 integers.
+ - loopback:
+ * Include this property to enable loopback at the SerDes
+ lane level.
+
+Example for Keystone K2E GBE:
+-----------------------------
+
+gbe_serdes0: gbe_serdes@232a000 {
+ #phy-cells = <0>;
+ compatible = "ti,keystone-serdes-gbe";
+ reg = <0x0232a000 0x2000>;
+ reg-names = "serdes";
+ link-rate-kbps = <1250000>;
+ num-lanes = <4>;
+ lanes {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ lane@0 {
+ /*loopback;*/
+ reg = <0>;
+ control-rate = <2>; /* quart */
+ rx-start = <7 5>;
+ rx-force = <1 1>;
+ tx-coeff = <0 0 0 12 4>;
+ /* c1 c2 cm att vreg */
+ };
+ lane@1 {
+ /*loopback;*/
+ reg = <1>;
+ control-rate = <2>; /* quart */
+ rx-start = <7 5>;
+ rx-force = <1 1>;
+ tx-coeff = <0 0 0 12 4>;
+ /* c1 c2 cm att vreg */
+ };
+ };
+};
+
+gbe_serdes1: gbe_serdes@2324000 {
+ #phy-cells = <0>;
+ compatible = "ti,keystone-serdes-gbe";
+ reg = <0x02324000 0x2000>;
+ reg-names = "serdes";
+ link-rate-kbps = <1250000>;
+ num-lanes = <4>;
+ lanes {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ lane@0 {
+ /*loopback;*/
+ reg = <0>;
+ control-rate = <2>; /* quart */
+ rx-start = <7 5>;
+ rx-force = <1 1>;
+ tx-coeff = <0 0 0 12 4>;
+ /* c1 c2 cm att vreg */
+ };
+ lane@1 {
+ /*loopback;*/
+ reg = <1>;
+ control-rate = <2>; /* quart */
+ rx-start = <7 5>;
+ rx-force = <1 1>;
+ tx-coeff = <0 0 0 12 4>;
+ /* c1 c2 cm att vreg */
+ };
+ };
+};
+
+netcp: netcp@24000000 {
+ ...
+
+ netcp-devices {
+ ...
+
+ gbe@200000 { /* ETHSS */
+ ...
+ serdeses {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ serdes@0 {
+ reg = <0>;
+ phys = <&gbe_serdes0>;
+ status = "ok";
+ };
+ serdes@1 {
+ reg = <1>;
+ phys = <&gbe_serdes1>;
+ status = "ok";
+ };
+
+ ...
+ };
+
+ ...
+ };
+
+ ...
+ };
+};
+
+Example for Keystone PCIE:
+--------------------------
+
+ pcie0_phy: serdes_phy@2320000 {
+ #phy-cells = <0>;
+ compatible = "ti,keystone-serdes-pcie";
+ reg = <0x02320000 0x4000>;
+ reg-names = "serdes";
+ num-lanes = <2>;
+ };
+
+
+Then the PHY can be used in PCIe controller node as
+
+ pcie0: pcie@21800000 {
+ ...
+
+ serdeses {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ serdes@0 {
+ reg = <0>;
+ phys = <&pcie0_phy>;
+ status = "disabled";
+ };
+ };
+ }
+
+Example for K2E 10GBE:
+----------------------
+
+Define the syscon regmaps for 10gbe subsystem:
+
+xgbe_subsys: xgbe_subsys@2f00000 {
+ status = "ok";
+ compatible = "syscon";
+ reg = <0x02f00000 0x100>;
+};
+
+Define the syscon regmaps for 10gbe pcsr:
+
+xgbe_pcsr: xgbe_pcsr@2f00000 {
+ status = "ok";
+ compatible = "syscon";
+ reg = <0x02f00600 0x100>;
+};
+
+Define the 10gbe SerDes node:
+
+xgbe_serdes: xgbe_serdes@231e000 {
+ status = "ok";
+ #phy-cells = <0>;
+ compatible = "ti,keystone-serdes-xgbe";
+ reg = <0x0231e000 0x2000>;
+ reg-names = "serdes";
+ link-rate-kbps = <10312500>;
+ num-lanes = <2>;
+ syscon-peripheral = <&xgbe_subsys>;
+ syscon-link = <&xgbe_pcsr>;
+ lanes {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ lane@0 {
+ /*loopback;*/
+ reg = <0>;
+ control-rate = <0>; /* full */
+ rx-start = <7 5>;
+ rx-force = <1 1>;
+ tx-coeff = <2 0 0 12 4>;
+ /* c1 c2 cm att vreg */
+ };
+ lane@1 {
+ /*loopback;*/
+ reg = <1>;
+ control-rate = <0>; /* full */
+ rx-start = <7 5>;
+ rx-force = <1 1>;
+ tx-coeff = <2 0 0 12 4>;
+ /* c1 c2 cm att vreg */
+ };
+ };
+};
+
+Then the 10gbe SerDes PHY can be used in the 10gbe switch node:
+
+netcpx: netcpx@2f00000 {
+
+ ...
+
+ netcp-devices {
+
+ ...
+
+ xgbe@2f00000 {
+
+ ...
+
+ syscon-subsys = <&xgbe_subsys>;
+ syscon-link = <&xgbe_pcsr>;
+
+ ...
+
+ serdeses {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ serdes@0 {
+ reg = <0>;
+ phys = <&xgbe_serdes>;
+ };
+ };
+
+
+ ...
+
+ };
+ };
+
+ ...
+
};
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 47da573..8fc21a4 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -118,6 +118,14 @@ config PHY_RCAR_GEN2
help
Support for USB PHY found on Renesas R-Car generation 2 SoCs.

+config PHY_TI_KEYSTONE_SERDES
+ tristate "TI Keystone SerDes PHY support"
+ depends on OF && ARCH_KEYSTONE
+ select GENERIC_PHY
+ help
+ This option enables support for TI Keystone SerDes PHY found
+ in peripherals GBE, 10GBE and PCIe.
+
config OMAP_CONTROL_PHY
tristate "OMAP CONTROL PHY Driver"
depends on ARCH_OMAP2PLUS || COMPILE_TEST
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index a5b18c1..8cb365b 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -46,3 +46,4 @@ obj-$(CONFIG_PHY_QCOM_UFS) += phy-qcom-ufs-qmp-14nm.o
obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o
obj-$(CONFIG_PHY_BRCMSTB_SATA) += phy-brcmstb-sata.o
obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
+obj-$(CONFIG_PHY_TI_KEYSTONE_SERDES) += phy-keystone-serdes.o
diff --git a/drivers/phy/phy-keystone-serdes.c b/drivers/phy/phy-keystone-serdes.c
new file mode 100644
index 0000000..f213006
--- /dev/null
+++ b/drivers/phy/phy-keystone-serdes.c
@@ -0,0 +1,2373 @@
+/*
+ * Texas Instruments Keystone SerDes driver
+ * Authors: WingMan Kwok <w-kwok2@ti.com>
+ *
+ * This is the SerDes Phy driver for Keystone devices. This is
+ * required to support PCIe RC functionality based on designware
+ * PCIe hardware, gbe and 10gbe found on these devices.
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * Neither the name of Texas Instruments Incorporated nor the names of
+ * its contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The contents of the array k2_100mhz_pcie_5gbps_serdes is covered by BSD
+ * license.
+ */
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/random.h>
+#include <linux/firmware.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/regmap.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+
+/*
+ * Keystone2 SERDES registers
+ */
+/* 0x1fc0 - 0x1fff */
+#define KSERDES_SS_OFFSET 0x1fc0
+/* 0x1fc0 */
+#define MOD_VER_REG (KSERDES_SS_OFFSET + 0x00)
+/* 0x1fc4 */
+#define MEM_ADR_REG (KSERDES_SS_OFFSET + 0x04)
+/* 0x1fc8 */
+#define MEM_DAT_REG (KSERDES_SS_OFFSET + 0x08)
+/* 0x1fcc */
+#define MEM_DATINC_REG (KSERDES_SS_OFFSET + 0x0c)
+/* 0x1fd0 */
+#define CPU_CTRL_REG (KSERDES_SS_OFFSET + 0x10)
+/* 0x1fe0, 0x1fe4 */
+#define LANE_CTRL_STS_REG(x) (KSERDES_SS_OFFSET + 0x20 + (x * 0x04))
+/* 0x1ff0 */
+#define LINK_LOSS_WAIT_REG (KSERDES_SS_OFFSET + 0x30)
+/* 0x1ff4 */
+#define PLL_CTRL_REG (KSERDES_SS_OFFSET + 0x34)
+
+/* CMU0 SS 0x0000 - 0x01ff */
+#define CMU0_SS_OFFSET 0x0000
+#define CMU0_REG(x) (CMU0_SS_OFFSET + x)
+
+/* LANE SS 0x0200 - 0x03ff, 0x0400 - 0x05ff, ... */
+#define LANE0_SS_OFFSET 0x0200
+#define LANEX_SS_OFFSET(x) (LANE0_SS_OFFSET * (x + 1))
+#define LANEX_REG(x, y) (LANEX_SS_OFFSET(x) + y)
+
+/* CML SS 0x0a00 - 0x0bff */
+#define CML_SS_OFFSET 0x0a00
+#define CML_REG(x) (CML_SS_OFFSET + x)
+
+/* CMU1 SS 0x0c00 - 0x0dff */
+#define CMU1_SS_OFFSET 0x0c00
+#define CMU1_REG(x) (CMU1_SS_OFFSET + x)
+
+/*
+ * XGE PCS-R registers
+ */
+#define PCSR_OFFSET(x) (x * 0x80)
+
+#define PCSR_TX_CTL(x) (PCSR_OFFSET(x) + 0x00)
+#define PCSR_TX_STATUS(x) (PCSR_OFFSET(x) + 0x04)
+#define PCSR_RX_CTL(x) (PCSR_OFFSET(x) + 0x08)
+#define PCSR_RX_STATUS(x) (PCSR_OFFSET(x) + 0x0C)
+
+#define XGE_CTRL_OFFSET 0x0c
+#define PCIE_PL_GEN2_OFFSET 0x180c
+
+#define reg_rmw(addr, value, mask) \
+ __raw_writel(((__raw_readl(addr) & (~(mask))) | \
+ (value & (mask))), (addr))
+
+/* Replaces bit field [msb:lsb] in register located
+ * at (base + offset) by val
+ */
+#define FINSR(base, offset, msb, lsb, val) \
+ reg_rmw((base) + (offset), ((val) << (lsb)), GENMASK((msb), (lsb)))
+
+/* This version of FEXTR is NOT safe for msb = 31, lsb = 0
+ * but then why would we need FEXTR for that case.
+ */
+#define FEXTR(val, msb, lsb) \
+ (((val) >> (lsb)) & ((1 << ((msb) - (lsb) + 1)) - 1))
+
+#define MOD_VER(serdes) \
+ ((kserdes_readl(serdes, MOD_VER_REG) >> 16) & 0xffff)
+
+#define PHY_A(serdes) (MOD_VER(serdes) != 0x4eba)
+
+#define FOUR_LANE(serdes) \
+ ((MOD_VER(serdes) == 0x4eb9) || (MOD_VER(serdes) == 0x4ebd))
+
+#define LANE_ENABLE(sc, n) ((sc)->lane[n].enable)
+
+#define for_each_enable_lane(func, sc) \
+ do { \
+ int i; \
+ for (i = 0; i < (sc)->lanes; i++) { \
+ if (!LANE_ENABLE((sc), i)) \
+ continue; \
+ \
+ (func)((sc), i); \
+ } \
+ } while (0)
+
+#define for_each_lane(func, sc) \
+ do { \
+ int i; \
+ for (i = 0; i < (sc)->lanes; i++) { \
+ (func)((sc), i); \
+ } \
+ } while (0)
+
+#define for_each_enable_lane_return(func, sc, r) \
+ do { \
+ int i; \
+ (r) = 0; \
+ for (i = 0; i < (sc)->lanes; i++) { \
+ if (!LANE_ENABLE((sc), i)) \
+ continue; \
+ \
+ (r) = (func)((sc), i); \
+ if ((r)) \
+ break; \
+ } \
+ } while (0)
+
+#define MAX_COMPARATORS 5
+#define DFE_OFFSET_SAMPLES 100
+
+/* CPU CTRL bits */
+#define CPU_EN BIT(31)
+#define CPU_GO BIT(30)
+#define POR_EN BIT(29)
+#define CPUREG_EN BIT(28)
+#define AUTONEG_CTL BIT(27)
+#define DATASPLIT BIT(26)
+#define LNKTRN_SIG_DET BIT(8)
+
+#define ANEG_LINK_CTL_10GKR_MASK GENMASK(21, 20)
+#define ANEG_LINK_CTL_1GKX_MASK GENMASK(17, 16)
+#define ANEG_LINK_CTL_1G10G_MASK \
+ (ANEG_LINK_CTL_10GKR_MASK | ANEG_LINK_CTL_1GKX_MASK)
+
+#define ANEG_1G_10G_OPT_MASK GENMASK(7, 5)
+
+#define SERDES_REG_INDEX 0
+
+/* SERDES internal memory */
+#define KSERDES_XFW_MEM_SIZE SZ_64K
+#define KSERDES_XFW_CONFIG_MEM_SIZE SZ_64
+#define KSERDES_XFW_NUM_PARAMS 5
+
+/* Last 64B of the 64KB internal mem is for parameters */
+#define KSERDES_XFW_CONFIG_START_ADDR \
+ (KSERDES_XFW_MEM_SIZE - KSERDES_XFW_CONFIG_MEM_SIZE)
+
+#define KSERDES_XFW_PARAM_START_ADDR \
+ (KSERDES_XFW_MEM_SIZE - (KSERDES_XFW_NUM_PARAMS * 4))
+
+/* All firmware file names end up here. List the firmware file names below.
+ * Newest first. Search starts from the 0-th array entry until a firmware
+ * file is found.
+ */
+const char *ks2_gbe_serdes_firmwares[] = {"ks2_gbe_serdes.bin"};
+const char *ks2_xgbe_serdes_firmwares[] = {"ks2_xgbe_serdes.bin"};
+const char *ks2_pcie_serdes_firmwares[] = {"ks2_pcie_serdes.bin"};
+
+/* SERDES Link Rate Kbps */
+enum KSERDES_LINK_RATE {
+ KSERDES_LINK_RATE_1P25G = 1250000,
+ KSERDES_LINK_RATE_3P125G = 3125000,
+ KSERDES_LINK_RATE_4P9152G = 4915200,
+ KSERDES_LINK_RATE_5G = 5000000,
+ KSERDES_LINK_RATE_6P144G = 6144000,
+ KSERDES_LINK_RATE_6P25G = 6250000,
+ KSERDES_LINK_RATE_7P3728G = 7372800,
+ KSERDES_LINK_RATE_9P8304G = 9830400,
+ KSERDES_LINK_RATE_10G = 10000000,
+ KSERDES_LINK_RATE_10P3125G = 10312500,
+ KSERDES_LINK_RATE_12P5G = 12500000,
+};
+
+/* SERDES Lane Control Rate */
+enum KSERDES_LANE_CTRL_RATE {
+ KSERDES_FULL_RATE,
+ KSERDES_HALF_RATE,
+ KSERDES_QUARTER_RATE,
+};
+
+enum KSERDES_PHY_TYPE {
+ KSERDES_PHY_SGMII,
+ KSERDES_PHY_XGE,
+ KSERDES_PHY_PCIE,
+ KSERDES_PHY_HYPERLINK,
+};
+
+struct kserdes_tx_coeff {
+ u32 c1;
+ u32 c2;
+ u32 cm;
+ u32 att;
+ u32 vreg;
+};
+
+struct kserdes_equalizer {
+ u32 att;
+ u32 boost;
+};
+
+struct kserdes_lane_config {
+ bool enable;
+ u32 ctrl_rate;
+ struct kserdes_tx_coeff tx_coeff;
+ struct kserdes_equalizer rx_start;
+ struct kserdes_equalizer rx_force;
+ bool loopback;
+};
+
+#define KSERDES_MAX_LANES 4
+
+struct kserdes_fw_config {
+ bool on;
+ u32 rate;
+ u32 link_loss_wait;
+ u32 lane_seeds;
+ u32 fast_train;
+ u32 active_lane;
+ u32 c1, c2, cm, attn, boost, dlpf, cdrcal;
+ u32 lane_config[KSERDES_MAX_LANES];
+};
+
+struct kserdes_config {
+ struct device *dev;
+ enum KSERDES_PHY_TYPE phy_type;
+ u32 lanes;
+ void __iomem *regs;
+ struct regmap *peripheral_regmap;
+ struct regmap *pcsr_regmap;
+ /* non-fw specific */
+ const char *init_fw;
+ struct serdes_cfg *init_cfg;
+ int init_cfg_len;
+ enum KSERDES_LINK_RATE link_rate;
+ bool rx_force_enable;
+ struct kserdes_lane_config lane[KSERDES_MAX_LANES];
+ /* fw specific */
+ bool firmware;
+ struct kserdes_fw_config fw;
+};
+
+struct kserdes_dev {
+ struct device *dev;
+ struct phy *phy;
+ struct kserdes_config sc;
+};
+
+struct kserdes_comparator_tap_offsets {
+ u32 cmp;
+ u32 tap1;
+ u32 tap2;
+ u32 tap3;
+ u32 tap4;
+ u32 tap5;
+};
+
+struct kserdes_lane_offsets {
+ struct kserdes_comparator_tap_offsets ct_ofs[MAX_COMPARATORS];
+};
+
+struct kserdes_offsets {
+ struct kserdes_lane_offsets lane_ofs[KSERDES_MAX_LANES];
+};
+
+struct serdes_cfg {
+ u32 ofs;
+ u32 msb;
+ u32 lsb;
+ u32 val;
+};
+
+static inline u32 kserdes_readl(void __iomem *base, u32 offset)
+{
+ return readl(base + offset);
+}
+
+static inline void kserdes_writel(void __iomem *base, u32 offset, u32 value)
+{
+ writel(value, base + offset);
+}
+
+static void kserdes_do_config(void __iomem *base,
+ struct serdes_cfg *cfg, u32 size)
+{
+ u32 i;
+
+ for (i = 0; i < size; i++)
+ FINSR(base, cfg[i].ofs, cfg[i].msb, cfg[i].lsb, cfg[i].val);
+}
+
+static int kserdes_load_init_fw(struct kserdes_config *sc,
+ const char **a_firmwares,
+ int n_firmwares)
+{
+ const struct firmware *fw;
+ bool found = false;
+ int ret, i;
+
+ for (i = 0; i < n_firmwares; i++) {
+ if (a_firmwares[i]) {
+ ret = request_firmware(&fw, a_firmwares[i], sc->dev);
+ if (!ret) {
+ found = true;
+ break;
+ }
+ }
+ }
+
+ if (!found) {
+ dev_err(sc->dev, "can't get any serdes init fw");
+ return -ENODEV;
+ }
+
+ sc->init_fw = a_firmwares[i];
+ sc->init_cfg = devm_kzalloc(sc->dev, fw->size, GFP_KERNEL);
+ memcpy((void *)sc->init_cfg, fw->data, fw->size);
+ sc->init_cfg_len = fw->size;
+ release_firmware(fw);
+
+ kserdes_do_config(sc->regs, sc->init_cfg,
+ sc->init_cfg_len / sizeof(struct serdes_cfg));
+
+ return 0;
+}
+
+static inline u32 _kserdes_read_tbus_val(void __iomem *sregs)
+{
+ u32 tmp;
+
+ if (PHY_A(sregs)) {
+ tmp = ((kserdes_readl(sregs, CMU0_REG(0xec))) >> 24) & 0x0ff;
+ tmp |= ((kserdes_readl(sregs, CMU0_REG(0xfc))) >> 16) & 0xf00;
+ } else {
+ tmp = ((kserdes_readl(sregs, CMU0_REG(0xf8))) >> 16) & 0xfff;
+ }
+
+ return tmp;
+}
+
+static void _kserdes_write_tbus_addr(void __iomem *sregs, int select, int ofs)
+{
+ if (select && !FOUR_LANE(sregs))
+ ++select;
+
+ if (PHY_A(sregs))
+ FINSR(sregs, CMU0_REG(0x8), 31, 24, ((select << 5) + ofs));
+ else
+ FINSR(sregs, CMU0_REG(0xfc), 26, 16, ((select << 8) + ofs));
+}
+
+static u32 _kserdes_read_select_tbus(void __iomem *sregs, int select, int ofs)
+{
+ /* set tbus address */
+ _kserdes_write_tbus_addr(sregs, select, ofs);
+ /* get tbus value */
+ return _kserdes_read_tbus_val(sregs);
+}
+
+static inline void kserdes_tap1_patch(struct kserdes_config *sc)
+{
+ FINSR(sc->regs, CML_REG(0xbc), 28, 24, 0x1e);
+}
+
+static inline void kserdes_set_tx_idle(struct kserdes_config *sc, u32 lane)
+{
+ if (sc->phy_type != KSERDES_PHY_XGE)
+ FINSR(sc->regs, LANEX_REG(lane, 0xb8), 17, 16, 3);
+
+ FINSR(sc->regs, LANE_CTRL_STS_REG(lane), 25, 24, 3);
+ FINSR(sc->regs, LANEX_REG(lane, 0x28), 21, 20, 0);
+}
+
+static inline void kserdes_clr_tx_idle(struct kserdes_config *sc, u32 lane)
+{
+ if (sc->phy_type != KSERDES_PHY_XGE)
+ FINSR(sc->regs, LANEX_REG(lane, 0xb8), 17, 16, 0);
+
+ FINSR(sc->regs, LANE_CTRL_STS_REG(lane), 25, 24, 0);
+ FINSR(sc->regs, LANEX_REG(lane, 0x28), 21, 20, 0);
+}
+
+static inline void kserdes_cdfe_enable(struct kserdes_config *sc, u32 lane)
+{
+ FINSR(sc->regs, LANEX_REG(lane, 0x94), 24, 24, 0x1);
+}
+
+static inline void kserdes_cdfe_force_calibration_enable(
+ struct kserdes_config *sc, u32 lane)
+{
+ FINSR(sc->regs, LANEX_REG(lane, 0x98), 0, 0, 0x1);
+}
+
+static void kserdes_phya_lane_patch(struct kserdes_config *sc, u32 lane)
+{
+ /* pma_ln_vreg */
+ FINSR(sc->regs, LANEX_REG(lane, 0x18), 25, 24, 0x2);
+ /* pma_ln_vregh */
+ FINSR(sc->regs, LANEX_REG(lane, 0x18), 27, 26, 0x2);
+ /* pma_int_step */
+ FINSR(sc->regs, LANEX_REG(lane, 0x14), 15, 13, 0x1);
+ /* turn off att_boost */
+ FINSR(sc->regs, LANEX_REG(lane, 0x4c), 19, 16, 0xf);
+ /* set dfe_bias to 10 */
+ FINSR(sc->regs, LANEX_REG(lane, 0x4c), 23, 20, 0xa);
+ /* Set offset average num of samples to max value */
+ FINSR(sc->regs, LANEX_REG(lane, 0x78), 30, 24, 0x7f);
+}
+
+static void kserdes_phyb_patch(struct kserdes_config *sc)
+{
+ /* Enables the Center DFE */
+ for_each_enable_lane(kserdes_cdfe_enable, sc);
+
+ /* setting initial cdfe */
+ FINSR(sc->regs, CML_REG(0x108), 23, 16, 0x04);
+
+ /* setting rx tap */
+ FINSR(sc->regs, CML_REG(0xbc), 28, 24, 0x0);
+
+ /* enable cdfe_ln_force_cal for cdfe */
+ for_each_lane(kserdes_cdfe_force_calibration_enable, sc);
+}
+
+static inline void kserdes_set_lane_starts(struct kserdes_config *sc, u32 lane)
+{
+ /* att start -1 for short channel */
+ FINSR(sc->regs, LANEX_REG(lane, 0x8c), 11, 8,
+ sc->lane[lane].rx_start.att);
+ /* boost start -3 for short channel */
+ FINSR(sc->regs, LANEX_REG(lane, 0x8c), 15, 12,
+ sc->lane[lane].rx_start.boost);
+}
+
+static void kserdes_phy_patch(struct kserdes_config *sc)
+{
+ if (sc->phy_type == KSERDES_PHY_XGE)
+ kserdes_phyb_patch(sc);
+ else if (sc->link_rate >= KSERDES_LINK_RATE_9P8304G)
+ for_each_enable_lane(kserdes_phya_lane_patch, sc);
+
+ /* Set ATT and BOOST start values for each lane */
+ for_each_enable_lane(kserdes_set_lane_starts, sc);
+}
+
+static inline void _kserdes_set_training_pattern(void __iomem *sregs)
+{
+ FINSR(sregs, CML_REG(0xc8), 5, 0, 0x0f);
+}
+
+static void kserdes_set_lane_overrides(struct kserdes_config *sc, u32 lane)
+{
+ u32 val_0, val_1, val;
+
+ /* read laneX_ctrl_i/laneX_pd_i */
+ val_0 = _kserdes_read_select_tbus(sc->regs, lane + 1, 0);
+
+ /* read laneX_rate_i */
+ val_1 = _kserdes_read_select_tbus(sc->regs, lane + 1, 1);
+
+ /* set RESET state */
+ val = 0;
+ /* user rate */
+ val |= ((val_1 >> 9) & 0x3) << 1;
+ /* user PD */
+ val |= (val_0 & 0x3) << 3;
+ /* user ctrl_i */
+ val |= ((val_0 >> 2) & 0x1ff) << 5;
+ /* set override */
+ val |= (1 << 14);
+ /* try claer TX Valid bits */
+ val &= ~0x60;
+
+ /* Only modify the reset bit and the overlay bit */
+ FINSR(sc->regs, LANEX_REG(lane, 0x028), 29, 15, val);
+}
+
+static inline void kserdes_assert_reset(struct kserdes_config *sc)
+{
+ for_each_enable_lane(kserdes_set_lane_overrides, sc);
+}
+
+static inline void kserdes_config_c1_c2_cm(struct kserdes_config *sc, u32 lane)
+{
+ u32 c1, c2, cm;
+
+ c1 = sc->lane[lane].tx_coeff.c1;
+ c2 = sc->lane[lane].tx_coeff.c2;
+ cm = sc->lane[lane].tx_coeff.cm;
+
+ if (sc->phy_type == KSERDES_PHY_XGE) {
+ /* TX Control override enable */
+ FINSR(sc->regs, LANEX_REG(lane, 0x8), 11, 8, (cm & 0xf));
+ FINSR(sc->regs, LANEX_REG(lane, 0x8), 4, 0, (c1 & 0x1f));
+ FINSR(sc->regs, LANEX_REG(lane, 0x8), 7, 5, (c2 & 0x7));
+ FINSR(sc->regs, LANEX_REG(lane, 0x4),
+ 18, 18, ((c2 >> 3) & 0x1));
+ } else {
+ FINSR(sc->regs, LANEX_REG(lane, 0x8), 15, 12, (cm & 0xf));
+ FINSR(sc->regs, LANEX_REG(lane, 0x8), 4, 0, (c1 & 0x1f));
+ FINSR(sc->regs, LANEX_REG(lane, 0x8), 11, 8, (c2 & 0xf));
+ }
+}
+
+static inline void kserdes_config_att_boost(struct kserdes_config *sc, u32 lane)
+{
+ u32 att, boost;
+
+ att = sc->lane[lane].rx_force.att;
+ boost = sc->lane[lane].rx_force.boost;
+
+ if (sc->phy_type == KSERDES_PHY_XGE) {
+ FINSR(sc->regs, LANEX_REG(lane, 0x98), 13, 13, 0);
+ FINSR(sc->regs, LANEX_REG(lane, 0x8c), 15, 12, boost);
+ FINSR(sc->regs, LANEX_REG(lane, 0x8c), 11, 8, att);
+ } else {
+ if (att != 1) {
+ FINSR(sc->regs, CML_REG(0x84), 0, 0, 0);
+ FINSR(sc->regs, CML_REG(0x8c), 24, 24, 0);
+ FINSR(sc->regs, LANEX_REG(lane, 0x8c), 11, 8, att);
+ }
+ if (boost != 1) {
+ FINSR(sc->regs, CML_REG(0x84), 1, 1, 0);
+ FINSR(sc->regs, CML_REG(0x8c), 25, 25, 0);
+ FINSR(sc->regs, LANEX_REG(lane, 0x8c), 15, 12, boost);
+ }
+ }
+}
+
+static void kserdes_set_tx_rx_fir_coeff(struct kserdes_config *sc, u32 lane)
+{
+ struct kserdes_tx_coeff *tc = &sc->lane[lane].tx_coeff;
+
+ if (sc->phy_type == KSERDES_PHY_XGE) {
+ /* Tx Swing */
+ FINSR(sc->regs, LANEX_REG(lane, 0x004), 29, 26, tc->att);
+ /* Regulator voltage */
+ FINSR(sc->regs, LANEX_REG(lane, 0x0a4), 2, 0, tc->vreg);
+ } else {
+ /* Tx Swing */
+ FINSR(sc->regs, LANEX_REG(lane, 0x004), 28, 25, tc->att);
+ /* Regulator voltage */
+ FINSR(sc->regs, LANEX_REG(lane, 0x084), 7, 5, tc->vreg);
+ }
+
+ kserdes_config_c1_c2_cm(sc, lane);
+
+ if (sc->rx_force_enable)
+ kserdes_config_att_boost(sc, lane);
+}
+
+static inline void _kserdes_force_signal_detect_low(
+ void __iomem *sregs, u32 lane)
+{
+ FINSR(sregs, LANEX_REG(lane, 0x004), 2, 1, 0x2);
+}
+
+static inline void kserdes_force_signal_detect_low(
+ struct kserdes_config *sc, u32 lane)
+{
+ _kserdes_force_signal_detect_low(sc->regs, lane);
+}
+
+static inline void _kserdes_force_signal_detect_high(
+ void __iomem *sregs, u32 lane)
+{
+ FINSR(sregs, LANEX_REG(lane, 0x004), 2, 1, 0x0);
+}
+
+static inline void kserdes_force_signal_detect_high(
+ struct kserdes_config *sc, u32 lane)
+{
+ _kserdes_force_signal_detect_high(sc->regs, lane);
+}
+
+static int kserdes_deassert_reset_poll_others(struct kserdes_config *sc)
+{
+ unsigned long timeout = jiffies + msecs_to_jiffies(500);
+ u32 lanes_not_ok = 0;
+ u32 ofs = 28;
+ u32 ret, i;
+
+ /* assume all enable lanes not-ok (1) and all others
+ * ok (0) to start
+ */
+ for (i = 0; i < sc->lanes; i++) {
+ if (!LANE_ENABLE(sc, i))
+ continue;
+
+ lanes_not_ok |= (1 << i);
+ }
+
+ /* This is not a mistake. For 2-laner, we
+ * check bit 29 and 30, NOT 28 and 29.
+ */
+ if (!FOUR_LANE(sc->regs))
+ ofs = 29;
+
+ do {
+ for (i = 0; i < sc->lanes; i++) {
+ if (!LANE_ENABLE(sc, i))
+ continue;
+
+ /* no need to check again if this lane's status
+ * is already good
+ */
+ if (!(lanes_not_ok & (1 << i)))
+ continue;
+
+ ret = kserdes_readl(sc->regs, CML_REG(0x1f8));
+
+ /* clear corresponding lane_not_ok bit if
+ * status is good (1)
+ */
+ if (ret & BIT(ofs + i))
+ lanes_not_ok &= ~(1 << i);
+ }
+
+ /* get out if all lanes are good to go */
+ if (!lanes_not_ok)
+ return 0;
+
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+
+ cpu_relax();
+ } while (true);
+}
+
+static int kserdes_deassert_reset_poll_pcie(struct kserdes_config *sc)
+{
+ unsigned long timeout = jiffies + msecs_to_jiffies(500);
+ u32 lanes_not_ok = 0;
+ u32 ret, i;
+
+ /* assume all enable lanes not-ok (1) and all others
+ * ok (0) to start
+ */
+ for (i = 0; i < sc->lanes; i++) {
+ if (!LANE_ENABLE(sc, i))
+ continue;
+
+ lanes_not_ok |= (1 << i);
+ }
+
+ do {
+ for (i = 0; i < sc->lanes; i++) {
+ if (!LANE_ENABLE(sc, i))
+ continue;
+
+ /* no need to check again if this lane's status
+ * is already good
+ */
+ if (!(lanes_not_ok & (1 << i)))
+ continue;
+
+ ret = _kserdes_read_select_tbus(sc->regs, i + 1, 0x02);
+
+ /* clear corresponding lane_not_ok bit if
+ * status is good (0)
+ */
+ if (!(ret & BIT(4)))
+ lanes_not_ok &= ~(1 << i);
+ }
+
+ /* get out if all lanes are good to go */
+ if (!lanes_not_ok)
+ return 0;
+
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+
+ cpu_relax();
+ } while (true);
+}
+
+static inline void _kserdes_lane_reset(void __iomem *serdes,
+ u32 lane, u32 reset)
+{
+ if (reset)
+ FINSR(serdes, LANEX_REG(lane, 0x28), 29, 29, 0x1);
+ else
+ FINSR(serdes, LANEX_REG(lane, 0x28), 29, 29, 0x0);
+}
+
+static inline void kserdes_release_reset(struct kserdes_config *sc, u32 lane)
+{
+ if (sc->phy_type == KSERDES_PHY_XGE) {
+ /* set pma_cmu_sel to 1 */
+ FINSR(sc->regs, LANEX_REG(lane, 0x60), 0, 0, 0x1);
+ }
+ /* release reset */
+ _kserdes_lane_reset(sc->regs, lane, 0);
+}
+
+static int kserdes_deassert_reset(struct kserdes_config *sc, u32 poll)
+{
+ int ret = 0;
+
+ for_each_enable_lane(kserdes_release_reset, sc);
+
+ if (!poll)
+ goto done;
+
+ /* Check Lane OK */
+ if (sc->phy_type == KSERDES_PHY_PCIE)
+ ret = kserdes_deassert_reset_poll_pcie(sc);
+ else
+ ret = kserdes_deassert_reset_poll_others(sc);
+
+done:
+ return ret;
+}
+
+static inline void kserdes_lane_disable(struct kserdes_config *sc, u32 lane)
+{
+ FINSR(sc->regs, LANE_CTRL_STS_REG(lane), 31, 29, 0x4);
+ FINSR(sc->regs, LANE_CTRL_STS_REG(lane), 15, 13, 0x4);
+}
+
+static inline void _kserdes_lane_enable(void __iomem *sregs, u32 lane)
+{
+ FINSR(sregs, LANE_CTRL_STS_REG(lane), 31, 29, 0x7);
+ FINSR(sregs, LANE_CTRL_STS_REG(lane), 15, 13, 0x7);
+}
+
+/* Caller should make sure sgmii cannot be fullrate */
+static inline int _kserdes_set_lane_ctrl_rate(
+ void __iomem *sregs,
+ u32 lane,
+ enum KSERDES_LANE_CTRL_RATE lane_ctrl_rate)
+{
+ u32 rate_mode;
+
+ if (lane_ctrl_rate == KSERDES_FULL_RATE)
+ rate_mode = 0x4;
+ else if (lane_ctrl_rate == KSERDES_QUARTER_RATE)
+ rate_mode = 0x6;
+ else if (lane_ctrl_rate == KSERDES_HALF_RATE)
+ rate_mode = 0x5;
+ else
+ return -EINVAL;
+
+ /* Tx */
+ FINSR(sregs, LANE_CTRL_STS_REG(lane), 28, 26, rate_mode);
+ /* Rx */
+ FINSR(sregs, LANE_CTRL_STS_REG(lane), 12, 10, rate_mode);
+ return 0;
+}
+
+static inline void _kserdes_set_lane_loopback(
+ void __iomem *sregs,
+ u32 lane,
+ enum KSERDES_LINK_RATE link_rate)
+{
+ if (link_rate == KSERDES_LINK_RATE_10P3125G) {
+ FINSR(sregs, LANEX_REG(lane, 0x0), 7, 0, 0x4);
+ FINSR(sregs, LANEX_REG(lane, 0x4), 2, 1, 0x3);
+ } else {
+ FINSR(sregs, LANEX_REG(lane, 0x0), 31, 24, 0x40);
+ }
+}
+
+static void kserdes_set_lane_rate(struct kserdes_config *sc, u32 lane)
+{
+ int ret;
+
+ ret = _kserdes_set_lane_ctrl_rate(sc->regs, lane,
+ sc->lane[lane].ctrl_rate);
+ if (ret) {
+ dev_err(sc->dev, "set_lane_rate FAILED: lane = %d err = %d\n",
+ lane, ret);
+ return;
+ }
+
+ /* disable attenuation auto scale */
+ FINSR(sc->regs, LANEX_REG(lane, 0x30), 11, 11, 0x1);
+ FINSR(sc->regs, LANEX_REG(lane, 0x30), 13, 12, 0x0);
+
+ /* set NES bit if loopback enabled */
+ if (sc->lane[lane].loopback)
+ _kserdes_set_lane_loopback(sc->regs, lane, sc->link_rate);
+
+ _kserdes_lane_enable(sc->regs, lane);
+}
+
+static inline void _kserdes_set_wait_after(void __iomem *sregs)
+{
+ FINSR(sregs, PLL_CTRL_REG, 17, 16, 0x3);
+}
+
+static inline void _kserdes_clear_wait_after(void __iomem *sregs)
+{
+ FINSR(sregs, PLL_CTRL_REG, 17, 16, 0);
+}
+
+static inline void _kserdes_pll_enable(void __iomem *sregs)
+{
+ FINSR(sregs, PLL_CTRL_REG, 31, 29, 0x7);
+}
+
+static inline void _kserdes_pll2_enable(void __iomem *sregs)
+{
+ FINSR(sregs, PLL_CTRL_REG, 27, 25, 0x7);
+}
+
+static inline void _kserdes_pll_disable(void __iomem *sregs)
+{
+ FINSR(sregs, PLL_CTRL_REG, 31, 29, 0x4);
+}
+
+static inline void _kserdes_pll2_disable(void __iomem *sregs)
+{
+ FINSR(sregs, PLL_CTRL_REG, 27, 25, 0x4);
+}
+
+static inline u32 _kserdes_get_pll_status(void __iomem *sregs)
+{
+ return FEXTR(kserdes_readl(sregs, PLL_CTRL_REG), 28, 28);
+}
+
+static inline u32 _kserdes_get_pll2_status(void __iomem *sregs)
+{
+ return FEXTR(kserdes_readl(sregs, PLL_CTRL_REG), 24, 24);
+}
+
+static inline void kserdes_lane_enable_loopback(void __iomem *serdes, u32 lane)
+{
+ FINSR(serdes, LANEX_REG(lane, 0), 31, 24, 0x40);
+}
+
+static inline u32 _kserdes_get_lane_status(
+ void __iomem *sregs,
+ u32 lane,
+ enum KSERDES_PHY_TYPE phy_type)
+{
+ if (phy_type == KSERDES_PHY_PCIE) {
+ return FEXTR(kserdes_readl(sregs, PLL_CTRL_REG), lane, lane);
+ } else if (phy_type == KSERDES_PHY_XGE) {
+ return FEXTR(kserdes_readl(sregs, CML_REG(0x1f8)),
+ (29 + lane), (29 + lane));
+ } else {
+ return FEXTR(kserdes_readl(sregs, PLL_CTRL_REG),
+ (8 + lane), (8 + lane));
+ }
+}
+
+static u32 kserdes_get_pll_lanes_status(struct kserdes_config *sc)
+{
+ u32 val, i;
+
+ /* Check PLL OK Status Bit */
+ val = _kserdes_get_pll_status(sc->regs);
+ if (!val) {
+ /* pll is not ready */
+ goto done;
+ }
+
+ if (sc->phy_type == KSERDES_PHY_XGE) {
+ val = _kserdes_get_pll2_status(sc->regs);
+ if (!val)
+ goto done;
+ }
+
+ /* Check Lane OK Status Bits */
+ for (i = 0; i < sc->lanes; i++) {
+ if (!LANE_ENABLE(sc, i))
+ continue;
+
+ val &= _kserdes_get_lane_status(sc->regs, i, sc->phy_type);
+ }
+
+done:
+ /* if any of the status is 0, this is 0
+ * i.e. serdes status is not good
+ */
+ return val;
+}
+
+int kserdes_get_status(struct kserdes_config *sc)
+{
+ unsigned long timeout;
+
+ /* is 500 msec a good number? */
+ timeout = jiffies + msecs_to_jiffies(500);
+ do {
+ if (kserdes_get_pll_lanes_status(sc))
+ break;
+
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+
+ cpu_relax();
+ } while (true);
+
+ return 0;
+}
+
+static inline u32 _kserdes_get_tx_termination(
+ void __iomem *sregs,
+ enum KSERDES_PHY_TYPE phy_type,
+ u32 lane)
+{
+ return (_kserdes_read_select_tbus(sregs, lane + 1,
+ ((phy_type == KSERDES_PHY_XGE) ?
+ 0x1a : 0x1b)) & 0xff);
+}
+
+static void kserdes_set_tx_terminations(struct kserdes_config *sc, u32 term)
+{
+ u32 i;
+
+ for (i = 0; i < sc->lanes; i++) {
+ FINSR(sc->regs, LANEX_REG(i, 0x7c), 31, 24, term);
+ /* set termination override */
+ FINSR(sc->regs, LANEX_REG(i, 0x7c), 20, 20, 0x1);
+ }
+}
+
+/* lane is 0-based */
+static void
+_kserdes_get_cmp_tap_offsets_xge(void __iomem *sregs, u32 lane, u32 cmp,
+ struct kserdes_comparator_tap_offsets *ofs)
+{
+ /* set comparator number */
+ FINSR(sregs, CML_REG(0x8c), 23, 21, cmp);
+
+ /* read offsets */
+ FINSR(sregs, CMU0_REG(0xfc), 26, 16, ((lane + 2) << 8) + 0x11);
+ ofs->cmp = (_kserdes_read_tbus_val(sregs) & 0x0ff0) >> 4;
+
+ FINSR(sregs, CMU0_REG(0xfc), 26, 16, ((lane + 2) << 8) + 0x11);
+ ofs->tap1 = (_kserdes_read_tbus_val(sregs) & 0x000f) << 3;
+
+ FINSR(sregs, CMU0_REG(0xfc), 26, 16, ((lane + 2) << 8) + 0x12);
+ ofs->tap1 |= (_kserdes_read_tbus_val(sregs) & 0x0e00) >> 9;
+ ofs->tap2 = (_kserdes_read_tbus_val(sregs) & 0x01f8) >> 3;
+ ofs->tap3 = (_kserdes_read_tbus_val(sregs) & 0x0007) << 3;
+
+ FINSR(sregs, CMU0_REG(0xfc), 26, 16, ((lane + 2) << 8) + 0x13);
+ ofs->tap3 |= (_kserdes_read_tbus_val(sregs) & 0x0e00) >> 9;
+ ofs->tap4 = (_kserdes_read_tbus_val(sregs) & 0x01f8) >> 3;
+ ofs->tap5 = (_kserdes_read_tbus_val(sregs) & 0x0007) << 3;
+
+ FINSR(sregs, CMU0_REG(0xfc), 26, 16, ((lane + 2) << 8) + 0x14);
+ ofs->tap5 |= (_kserdes_read_tbus_val(sregs) & 0x0e00) >> 9;
+}
+
+static void kserdes_add_offsets_xge(struct kserdes_config *sc,
+ struct kserdes_offsets *sofs)
+{
+ struct kserdes_comparator_tap_offsets *ctofs;
+ struct kserdes_comparator_tap_offsets sample;
+ struct kserdes_lane_offsets *lofs;
+ u32 lane, cmp;
+
+ for (lane = 0; lane < sc->lanes; lane++) {
+ lofs = &sofs->lane_ofs[lane];
+ /* yes cmp starts from 1 */
+ for (cmp = 1; cmp < MAX_COMPARATORS; cmp++) {
+ ctofs = &lofs->ct_ofs[cmp];
+
+ _kserdes_get_cmp_tap_offsets_xge(sc->regs, lane,
+ cmp, &sample);
+
+ ctofs->cmp += sample.cmp;
+ ctofs->tap1 += sample.tap1;
+ ctofs->tap2 += sample.tap2;
+ ctofs->tap3 += sample.tap3;
+ ctofs->tap4 += sample.tap4;
+ ctofs->tap5 += sample.tap5;
+ }
+ }
+}
+
+/* lane is 0-based */
+static void
+kserdes_get_cmp_tap_offsets_non_xge(void __iomem *sregs, u32 lane, u32 cmp,
+ struct kserdes_comparator_tap_offsets *ofs)
+{
+ /* set comparator number */
+ FINSR(sregs, CML_REG(0x8c), 23, 21, cmp);
+
+ /* read offsets */
+ FINSR(sregs, CMU0_REG(0x8), 31, 24, ((lane + 1) << 5) + 0x12);
+ ofs->cmp = (_kserdes_read_tbus_val(sregs) & 0x0ff0) >> 4;
+}
+
+static void kserdes_add_offsets_non_xge(struct kserdes_config *sc,
+ struct kserdes_offsets *sofs)
+{
+ struct kserdes_comparator_tap_offsets *ctofs;
+ struct kserdes_comparator_tap_offsets sample;
+ struct kserdes_lane_offsets *lofs;
+ u32 lane, cmp;
+
+ for (lane = 0; lane < sc->lanes; lane++) {
+ lofs = &sofs->lane_ofs[lane];
+ /* yes cmp starts from 1 */
+ for (cmp = 1; cmp < MAX_COMPARATORS; cmp++) {
+ ctofs = &lofs->ct_ofs[cmp];
+
+ kserdes_get_cmp_tap_offsets_non_xge(sc->regs, lane,
+ cmp, &sample);
+
+ ctofs->cmp += sample.cmp;
+ }
+ }
+}
+
+static void kserdes_get_average_offsets(struct kserdes_config *sc, u32 samples,
+ struct kserdes_offsets *sofs)
+{
+ struct kserdes_comparator_tap_offsets *ctofs;
+ struct kserdes_lane_offsets *lofs;
+ u32 i, lane, cmp;
+ int ret;
+
+ memset(sofs, 0, sizeof(*sofs));
+
+ /* get the total of each offset for specified number of samples */
+ for (i = 0; i < samples; i++) {
+ kserdes_assert_reset(sc);
+ ret = kserdes_deassert_reset(sc, 1);
+ if (ret) {
+ dev_err(sc->dev,
+ "kserdes_get_average_offsets: reset failed %d\n",
+ ret);
+ return;
+ }
+
+ if (sc->phy_type == KSERDES_PHY_XGE)
+ kserdes_add_offsets_xge(sc, sofs);
+ else
+ kserdes_add_offsets_non_xge(sc, sofs);
+ }
+
+ /* take the average */
+ for (lane = 0; lane < sc->lanes; lane++) {
+ lofs = &sofs->lane_ofs[lane];
+ /* yes cmp starts from 1 */
+ for (cmp = 1; cmp < MAX_COMPARATORS; cmp++) {
+ ctofs = &lofs->ct_ofs[cmp];
+ if (sc->phy_type == KSERDES_PHY_XGE) {
+ ctofs->cmp /= samples;
+ ctofs->tap1 /= samples;
+ ctofs->tap2 /= samples;
+ ctofs->tap3 /= samples;
+ ctofs->tap4 /= samples;
+ ctofs->tap5 /= samples;
+ } else {
+ ctofs->cmp /= samples;
+ }
+ }
+ }
+}
+
+static void
+_kserdes_override_cmp_tap_offsets(void __iomem *sregs, u32 lane, u32 cmp,
+ struct kserdes_comparator_tap_offsets *ofs)
+{
+ /* set dfe_shadow_lane_sel */
+ FINSR(sregs, CML_REG(0xf0), 27, 26, (lane + 1));
+
+ /* set cmp_offset_ovr_en to 1 */
+ FINSR(sregs, CML_REG(0x98), 24, 24, 0x1);
+
+ /* set rxeq_ovr_en to 0x1 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 2, 2, 0x1);
+
+ /* set rxeq_dfe_cmp_sel_ovr to comp_no */
+ FINSR(sregs, LANEX_REG(lane, 0x30), 7, 5, cmp);
+
+ /* set dfe_tap_ovr_en to 1 */
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 31, 31, 0x1);
+
+ /* set cmp offset override */
+ FINSR(sregs, CML_REG(0x9c), 7, 0, ofs->cmp);
+ /* set tap offset overrides */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 30, 24, ofs->tap1);
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 5, 0, ofs->tap2);
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 13, 8, ofs->tap3);
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 21, 16, ofs->tap4);
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 29, 24, ofs->tap5);
+
+ /* set rxeq_ovr_latch_o = 0x1 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 10, 10, 0x1);
+ /* set rxeq_ovr_latch_o = 0x0 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 10, 10, 0x0);
+
+ /* set cmp_offset_ovr_en to 0 */
+ FINSR(sregs, CML_REG(0x98), 24, 24, 0x0);
+ /* set rxeq_ovr_en to 0x0 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 2, 2, 0x0);
+ /* set dfe_tap_ovr_en to 0 */
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 31, 31, 0x0);
+}
+
+static inline void
+_kserdes_override_cmp_offset_cdfe(void __iomem *sregs, u32 lane,
+ u32 cmp, u32 cmp_offset)
+{
+ /* enable comparator offset calibrate */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 18, 18, 0x1);
+
+ /* set gcfsm sel override to comparator */
+ FINSR(sregs, LANEX_REG(lane, 0x4c), 5, 2, (0x1 << (cmp - 1)));
+ /* set comparator offset */
+ FINSR(sregs, LANEX_REG(lane, 0x48), 24, 17, cmp_offset);
+ /* latch in value */
+ FINSR(sregs, LANEX_REG(lane, 0x48), 29, 29, 0x1);
+ FINSR(sregs, LANEX_REG(lane, 0x48), 29, 29, 0x0);
+
+ /* disable comparator offset calibrate */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 18, 18, 0x0);
+}
+
+static inline void
+_kserdes_override_tap_offset_cdfe(void __iomem *sregs, u32 lane,
+ u32 tap, u32 width, u32 tap_offset)
+{
+ /* enable tap */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 23, 19, BIT(tap - 1));
+ /* set tap offset */
+ FINSR(sregs, LANEX_REG(lane, 0x48), 17 + (width - 1), 17, tap_offset);
+ /* latch in value */
+ FINSR(sregs, LANEX_REG(lane, 0x48), 29, 29, 0x1);
+ FINSR(sregs, LANEX_REG(lane, 0x48), 29, 29, 0x0);
+}
+
+static void _kserdes_override_cmp_tap_offsets_cdfe(
+ void __iomem *sregs,
+ u32 lane,
+ u32 cmp,
+ struct kserdes_comparator_tap_offsets *ofs)
+{
+ /* enable overrides */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 16, 16, 0x1);
+ FINSR(sregs, LANEX_REG(lane, 0x48), 16, 16, 0x1);
+
+ _kserdes_override_cmp_offset_cdfe(sregs, lane, cmp, ofs->cmp);
+
+ /* enable tap offset calibrate */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 17, 17, 0x1);
+
+ /* set tap offsets */
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 1, 7, ofs->tap1);
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 2, 6, ofs->tap2);
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 3, 6, ofs->tap3);
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 4, 6, ofs->tap4);
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 5, 6, ofs->tap5);
+
+ /* disable overrides */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 16, 16, 0x0);
+ FINSR(sregs, LANEX_REG(lane, 0x48), 16, 16, 0x0);
+ FINSR(sregs, LANEX_REG(lane, 0x58), 18, 18, 0x0);
+ FINSR(sregs, LANEX_REG(lane, 0x58), 17, 17, 0x0);
+}
+
+static void kserdes_set_offsets_xge(struct kserdes_config *sc,
+ struct kserdes_offsets *sofs)
+{
+ struct kserdes_comparator_tap_offsets *ctofs;
+ struct kserdes_lane_offsets *lofs;
+ u32 lane, cmp;
+
+ for (lane = 0; lane < sc->lanes; lane++) {
+ lofs = &sofs->lane_ofs[lane];
+ for (cmp = 1; cmp < MAX_COMPARATORS; cmp++) {
+ ctofs = &lofs->ct_ofs[cmp];
+ _kserdes_override_cmp_tap_offsets(sc->regs, lane,
+ cmp, ctofs);
+ _kserdes_override_cmp_tap_offsets_cdfe(sc->regs, lane,
+ cmp, ctofs);
+ }
+ }
+}
+
+static void kserdes_set_offsets_non_xge(struct kserdes_config *sc,
+ struct kserdes_offsets *sofs)
+{
+ struct kserdes_comparator_tap_offsets *ctofs;
+ struct kserdes_lane_offsets *lofs;
+ u32 lane, cmp;
+
+ for (lane = 0; lane < sc->lanes; lane++) {
+ lofs = &sofs->lane_ofs[lane];
+ for (cmp = 1; cmp < MAX_COMPARATORS; cmp++) {
+ ctofs = &lofs->ct_ofs[cmp];
+ _kserdes_override_cmp_tap_offsets(sc->regs, lane,
+ cmp, ctofs);
+ }
+ }
+}
+
+static void kserdes_set_offsets(struct kserdes_config *sc,
+ struct kserdes_offsets *sofs)
+{
+ if (sc->phy_type == KSERDES_PHY_XGE)
+ kserdes_set_offsets_xge(sc, sofs);
+ else
+ kserdes_set_offsets_non_xge(sc, sofs);
+}
+
+static void kserdes_dfe_offset_calibration(struct kserdes_config *sc,
+ struct kserdes_offsets *sofs)
+{
+ for_each_enable_lane(kserdes_force_signal_detect_low, sc);
+ usleep_range(10, 20);
+
+ /* offset compensation patch */
+ kserdes_get_average_offsets(sc, DFE_OFFSET_SAMPLES, sofs);
+ kserdes_set_offsets(sc, sofs);
+ usleep_range(10, 20);
+
+ /* re-acquire signal detect */
+ for_each_lane(kserdes_force_signal_detect_high, sc);
+ usleep_range(10, 20);
+}
+
+static void kserdes_override_tap_offsets(struct kserdes_config *sc, u32 lane)
+{
+ u32 tap1val, tap2val, tap3val, tap4val, tap5val;
+ void __iomem *sregs = sc->regs;
+ u32 cmp, tap1_ofs;
+
+ for (cmp = 1; cmp < MAX_COMPARATORS; cmp++) {
+ /* adjust taps only for center comparators of
+ * of conparator 1 and 3
+ */
+ if (!(cmp & 0x1))
+ continue;
+
+ /* set comparator number */
+ FINSR(sregs, CML_REG(0x8c), 23, 21, cmp);
+
+ /* read offsets */
+ FINSR(sregs, CMU0_REG(0x8), 31, 24, ((lane + 1) << 5) + 0x12);
+ tap1_ofs = (_kserdes_read_tbus_val(sregs) & 0x000f) << 3;
+
+ FINSR(sregs, CMU0_REG(0x8), 31, 24, ((lane + 1) << 5) + 0x13);
+ tap1_ofs |= (_kserdes_read_tbus_val(sregs) & 0x0e00) >> 9;
+
+ tap1val = tap1_ofs - 14;
+ tap2val = 31;
+ tap3val = 31;
+ tap4val = 31;
+ tap5val = 31;
+
+ /* set dfe_shadow_lane_sel */
+ FINSR(sregs, CML_REG(0xf0), 27, 26, lane + 1);
+ /* Set rxeq_ovr_en to 0x1 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 2, 2, 0x1);
+ /* set rxeq_dfe_cmp_sel_ovr to comp_no */
+ FINSR(sregs, LANEX_REG(lane, 0x30), 7, 5, cmp);
+ /* set dfe_tap_ovr_en to 1 */
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 31, 31, 0x1);
+
+ /* set tap overrides */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 30, 24, tap1val);
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 6, 0, tap2val);
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 13, 8, tap3val);
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 21, 16, tap4val);
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 29, 24, tap5val);
+
+ /* set rxeq_ovr_latch_o = 0x1 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 10, 10, 0x1);
+ /* set rxeq_ovr_latch_o = 0x0 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 10, 10, 0x0);
+
+ /* set rxeq_ovr_en to 0 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 2, 2, 0x0);
+ /* set dfe_tap_ovr_en to 0 */
+ FINSR(sregs, LANEX_REG(lane, 0x5c), 31, 31, 0x0);
+
+ /* This part of code will latch in offsets to
+ * tap adaptation logic so that if adaptation
+ * occurs, it will pick these offsets
+ */
+ /* enable overrides */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 16, 16, 0x1);
+ FINSR(sregs, LANEX_REG(lane, 0x48), 16, 16, 0x1);
+
+ /* set gcfsm_cmp_sel to comp_no */
+ FINSR(sregs, LANEX_REG(lane, 0x4c), 5, 2, (0x1 << (cmp - 1)));
+ /* enable tap offset calibrate */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 17, 17, 0x1);
+
+ /* enable taps */
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 1, 7, tap1val);
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 2, 6, tap2val);
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 3, 6, tap3val);
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 4, 6, tap4val);
+ _kserdes_override_tap_offset_cdfe(sregs, lane, 5, 6, tap5val);
+
+ /* Disable overrides */
+ FINSR(sregs, LANEX_REG(lane, 0x58), 16, 16, 0x0);
+ FINSR(sregs, LANEX_REG(lane, 0x48), 16, 16, 0x0);
+ FINSR(sregs, LANEX_REG(lane, 0x58), 17, 17, 0x0);
+ }
+}
+
+static int kserdes_wait_lane_rx_valid(struct kserdes_config *sc, u32 lane)
+{
+ unsigned long timeout = jiffies + msecs_to_jiffies(500);
+ u32 status;
+
+ do {
+ status = _kserdes_read_select_tbus(sc->regs, lane + 1, 0x02);
+
+ if (status & 0x20)
+ return 0;
+
+ if (time_after(jiffies, timeout))
+ return -ETIMEDOUT;
+
+ cpu_relax();
+ } while (true);
+}
+
+static int kserdes_att_boost_phya_macro_patch(struct kserdes_config *sc)
+{
+ u32 i, att_read[KSERDES_MAX_LANES], att_start[KSERDES_MAX_LANES];
+ int ret;
+
+ /* First save a copy of initial att start value */
+ for (i = 0; i < sc->lanes; i++) {
+ att_start[i] = kserdes_readl(sc->regs, LANEX_REG(i, 0x8c));
+ att_start[i] = (att_start[i] >> 8) & 0xf;
+ }
+ /* Get att and fix this as start value. Turn off att adaptation and
+ * do boost readaptation
+ */
+ for (i = 0; i < sc->lanes; i++) {
+ att_read[i] = _kserdes_read_select_tbus(
+ sc->regs, i + 1,
+ (sc->phy_type == KSERDES_PHY_XGE) ?
+ 0x10 : 0x11);
+ att_read[i] = (att_read[i] >> 4) & 0xf;
+ }
+ for (i = 0; i < sc->lanes; i++) {
+ /* att start */
+ FINSR(sc->regs, LANEX_REG(i, 0x8c), 11, 8, att_read[i]);
+ }
+ /* clear att init calibration */
+ FINSR(sc->regs, CML_REG(0x84), 0, 0, 0x0);
+ /* clear att re-calibration */
+ FINSR(sc->regs, CML_REG(0x8c), 24, 24, 0x0);
+
+ /* force calibration on all lanes */
+ /* set att continuous recal */
+ FINSR(sc->regs, CML_REG(0x98), 7, 7, 0x1);
+ /* clear att continuous recal */
+ FINSR(sc->regs, CML_REG(0x98), 7, 7, 0x0);
+ usleep_range(300, 400);
+
+ /* check rx valid */
+ for_each_enable_lane_return(kserdes_wait_lane_rx_valid, sc, ret);
+ if (ret) {
+ dev_err(sc->dev, "kserdes_wait_lane_rx_valid FAILED %d\n", ret);
+ return ret;
+ }
+
+ /* write back initial att start value */
+ for (i = 0; i < sc->lanes; i++)
+ FINSR(sc->regs, LANEX_REG(i, 0x8c), 11, 8, att_start[i]);
+
+ /* turn att adaptation back on */
+ FINSR(sc->regs, CML_REG(0x84), 0, 0, 0x1);
+ FINSR(sc->regs, CML_REG(0x8c), 24, 24, 0x1);
+
+ return 0;
+}
+
+static int kserdes_att_boost_phya_lane_patch(struct kserdes_config *sc,
+ u32 lane)
+{
+ u32 boost_read;
+ int ret;
+
+ /* check lane rx valid */
+ ret = kserdes_wait_lane_rx_valid(sc, lane);
+ if (ret) {
+ dev_err(sc->dev, "kserdes_wait_lane_rx_valid FAILED %d\n", ret);
+ return ret;
+ }
+
+ /* check boost value */
+ boost_read = _kserdes_read_select_tbus(
+ sc->regs, lane + 1,
+ (sc->phy_type == KSERDES_PHY_XGE) ?
+ 0x10 : 0x11);
+ boost_read = (boost_read >> 8) & 0xf;
+
+ /* increment boost by 1 if it's 0 */
+ if (!boost_read) {
+ /* Set rxeq_ovr_en to 1 */
+ FINSR(sc->regs, LANEX_REG(lane, 0x2c), 2, 2, 0x1);
+ /* set rxeq_ovr_load_en for boost only */
+ FINSR(sc->regs, LANEX_REG(lane, 0x2c), 18, 12, 0x2);
+ /* set rxeq_ovr_load for a value of 1 */
+ FINSR(sc->regs, LANEX_REG(lane, 0x2c), 9, 3, 0x1);
+ /* latch in new boost value */
+ FINSR(sc->regs, LANEX_REG(lane, 0x2c), 10, 10, 0x1);
+ FINSR(sc->regs, LANEX_REG(lane, 0x2c), 10, 10, 0x0);
+ /* reset previous registers */
+ FINSR(sc->regs, LANEX_REG(lane, 0x2c), 2, 2, 0x0);
+ FINSR(sc->regs, LANEX_REG(lane, 0x2c), 18, 12, 0x0);
+ FINSR(sc->regs, LANEX_REG(lane, 0x2c), 9, 3, 0x0);
+ }
+ return 0;
+}
+
+static inline void kserdes_att_boost_phya_patch(struct kserdes_config *sc)
+{
+ kserdes_att_boost_phya_macro_patch(sc);
+
+ for_each_enable_lane(kserdes_att_boost_phya_lane_patch, sc);
+}
+
+static void kserdes_att_boost_phyb_lane_patch(struct kserdes_config *sc,
+ u32 lane)
+{
+ u32 tbus_ofs, rxeq_init_reg_ofs, rxeq_ln_reg_ofs, rxeq_ln_force_bit;
+ void __iomem *sregs = sc->regs;
+ u32 att_start, att_read, boost_read;
+ int ret;
+
+ /* some setups */
+ if (sc->phy_type == KSERDES_PHY_XGE) {
+ tbus_ofs = 0x10;
+ rxeq_init_reg_ofs = 0x9c;
+ rxeq_ln_reg_ofs = 0x98;
+ rxeq_ln_force_bit = 14;
+ } else {
+ tbus_ofs = 0x11;
+ rxeq_init_reg_ofs = 0x84;
+ rxeq_ln_reg_ofs = 0xac;
+ rxeq_ln_force_bit = 11;
+ }
+
+ /* First save a copy of initial att start value */
+ att_start = kserdes_readl(sregs, LANEX_REG(lane, 0x8c));
+ att_start = (att_start >> 8) & 0xf;
+
+ /* Get att and fix this as start value. Turn off att adaptation and
+ * do boost readaptation
+ */
+ att_read = _kserdes_read_select_tbus(sregs, lane + 1, tbus_ofs);
+ att_read = (att_read >> 4) & 0xf;
+
+ /* att start */
+ FINSR(sregs, LANEX_REG(lane, 0x8c), 11, 8, att_read);
+ /* clear att init calibration */
+ FINSR(sregs, LANEX_REG(lane, rxeq_init_reg_ofs), 0, 0, 0x0);
+ /* clear att re-calibration */
+ FINSR(sregs, CML_REG(0x8c), 24, 24, 0x0);
+
+ /* force calibration */
+ FINSR(sregs, LANEX_REG(lane, rxeq_ln_reg_ofs),
+ rxeq_ln_force_bit, rxeq_ln_force_bit, 0x1);
+ FINSR(sregs, LANEX_REG(lane, rxeq_ln_reg_ofs),
+ rxeq_ln_force_bit, rxeq_ln_force_bit, 0x0);
+
+ /* check lane rx valid */
+ ret = kserdes_wait_lane_rx_valid(sc, lane);
+ if (ret) {
+ dev_err(sc->dev, "kserdes_wait_lane_rx_valid %d FAILED: %d\n",
+ lane, ret);
+ }
+ usleep_range(300, 400);
+
+ /* check boost value */
+ boost_read = _kserdes_read_select_tbus(sregs, lane + 1, tbus_ofs);
+ boost_read = (boost_read >> 8) & 0xf;
+
+ /* increment boost by 1 if it's 0 */
+ if (!boost_read) {
+ /* Set rxeq_ovr_en to 1 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 2, 2, 0x1);
+ /* set rxeq_ovr_load_en for boost only */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 18, 12, 0x2);
+ /* set rxeq_ovr_load for a value of 1 */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 9, 3, 0x1);
+ /* latch in new boost value */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 10, 10, 0x1);
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 10, 10, 0x0);
+ /* reset previous registers */
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 2, 2, 0x0);
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 18, 12, 0x0);
+ FINSR(sregs, LANEX_REG(lane, 0x2c), 9, 3, 0x0);
+ }
+
+ /* write back initial att start value */
+ FINSR(sregs, LANEX_REG(lane, 0x8c), 11, 8, att_start);
+ /* turn att adaptation back on */
+ FINSR(sregs, LANEX_REG(lane, rxeq_init_reg_ofs), 0, 0, 0x1);
+ FINSR(sregs, CML_REG(0x8c), 24, 24, 0x1);
+}
+
+static inline void kserdes_att_boost_phyb_patch(struct kserdes_config *sc,
+ u32 lane)
+{
+ kserdes_att_boost_phyb_lane_patch(sc, lane);
+}
+
+static void kserdes_att_boost_phy_patch(struct kserdes_config *sc)
+{
+ if (sc->phy_type != KSERDES_PHY_XGE)
+ kserdes_att_boost_phya_patch(sc);
+ else
+ for_each_lane(kserdes_att_boost_phyb_patch, sc);
+}
+
+int kserdes_sgmii_lanes_enable(struct kserdes_config *sc)
+{
+ int ret, i;
+ u32 val, lanes_enable = 0;
+
+ for (i = 0; i < sc->lanes; i++) {
+ if (!LANE_ENABLE(sc, i))
+ continue;
+
+ lanes_enable |= (1 << i);
+ }
+
+ /* configure Tap 1 if PHY-A and link rate greater than 8Gbaud */
+ if (sc->link_rate >= KSERDES_LINK_RATE_9P8304G)
+ kserdes_tap1_patch(sc);
+
+ /* disable transmitter on all lanes to prevent
+ * receiver from adapting
+ */
+ for_each_lane(kserdes_set_tx_idle, sc);
+
+ /* apply patch for link rates greater than 8Gbaud */
+ kserdes_phy_patch(sc);
+
+ /* write boost training pattern for Hyperlink functional mode */
+ if (sc->phy_type == KSERDES_PHY_HYPERLINK)
+ _kserdes_set_training_pattern(sc->regs);
+
+ /* assert serdes reset */
+ kserdes_assert_reset(sc);
+
+ /* apply the TX and RX FIR coefficients to the lanes */
+ for_each_enable_lane(kserdes_set_tx_rx_fir_coeff, sc);
+
+ /* force Signal Detect Low. This resets the CDR,
+ * Attenuation and Boost circuitry
+ */
+ for_each_enable_lane(kserdes_force_signal_detect_low, sc);
+
+ ret = kserdes_deassert_reset(sc, 0);
+ if (ret) {
+ dev_err(sc->dev, "kserdes_deassert_reset FAILED %d\n", ret);
+ return ret;
+ }
+
+ /* allow signal detect enable */
+ for_each_enable_lane(kserdes_set_lane_rate, sc);
+
+ _kserdes_pll_enable(sc->regs);
+
+ ret = kserdes_get_status(sc);
+ if (ret) {
+ dev_err(sc->dev, "kserdes_get_status FAILED %d\n", ret);
+ return ret;
+ }
+
+ /* get tx termination on lane 0 */
+ val = _kserdes_get_tx_termination(sc->regs, sc->phy_type, 0);
+
+ /* apply tx termination to all lanes */
+ kserdes_set_tx_terminations(sc, val);
+
+ if (sc->link_rate >= KSERDES_LINK_RATE_9P8304G) {
+ /* manually adjust Tap 1 value for phy-a > 8GBaud */
+ for_each_enable_lane(kserdes_override_tap_offsets, sc);
+ }
+
+ /* We are always in FUNCTIONAL mode, so we always
+ * continue to the following.
+ */
+ /* enable transmitter on all lanes */
+ for_each_enable_lane(kserdes_clr_tx_idle, sc);
+
+ /* allow Signal Detect Enable */
+ for_each_enable_lane(kserdes_force_signal_detect_high, sc);
+
+ /* Wait for RX Valid on all lanes */
+ for_each_enable_lane_return(kserdes_wait_lane_rx_valid, sc, ret);
+ if (ret) {
+ dev_err(sc->dev, "kserdes_wait_lane_rx_valid FAILED %d\n", ret);
+ return ret;
+ }
+
+ /* Apply Attenuation and Boost Patch if rx force
+ * flag is set
+ */
+ if (!sc->rx_force_enable)
+ kserdes_att_boost_phy_patch(sc);
+
+ /* If needed, check for errors or see if DLPF is
+ * railing and toggle signal detect
+ */
+ /* CSL_Serdes_CDR_Reset(); */
+
+ /* Enable MAC RX to allow MAC to take control */
+ _kserdes_clear_wait_after(sc->regs);
+
+ return lanes_enable;
+}
+
+static int kserdes_sgmii_init(struct kserdes_config *sc)
+{
+ return kserdes_load_init_fw(sc, ks2_gbe_serdes_firmwares,
+ ARRAY_SIZE(ks2_gbe_serdes_firmwares));
+}
+
+static inline void _kserdes_set_link_loss_wait(void __iomem *sregs,
+ u32 link_loss_wait)
+{
+ kserdes_writel(sregs, LINK_LOSS_WAIT_REG, link_loss_wait);
+}
+
+static inline void _kserdes_reset(void __iomem *sregs)
+{
+ /* Toggle POR_EN bit */
+ FINSR(sregs, CPU_CTRL_REG, 29, 29, 0x1);
+ usleep_range(10, 20);
+ FINSR(sregs, CPU_CTRL_REG, 29, 29, 0x0);
+ usleep_range(10, 20);
+}
+
+static inline void kserdes_xge_pll_enable(struct kserdes_config *sc)
+{
+ /* phyb reset clear */
+ if (!sc->firmware)
+ FINSR(sc->regs, CML_REG(0), 7, 0, 0x1f);
+
+ if (sc->link_rate == KSERDES_LINK_RATE_10P3125G) {
+ _kserdes_pll_enable(sc->regs);
+ _kserdes_pll2_enable(sc->regs);
+ } else if (sc->link_rate == KSERDES_LINK_RATE_1P25G) {
+ kserdes_writel(sc->regs, PLL_CTRL_REG, 0xe0000000);
+ }
+}
+
+static inline void _kserdes_xge_enable_pcs(void __iomem *sregs, u32 lane)
+{
+ /* set bus-width to 16 bit mode */
+ FINSR(sregs, LANE_CTRL_STS_REG(lane), 23, 21, 0x7);
+ FINSR(sregs, LANE_CTRL_STS_REG(lane), 5, 3, 0x7);
+
+ /* enable PCS overlay and lane select 10GKR */
+ FINSR(sregs, LANE_CTRL_STS_REG(lane), 16, 16, 0x1);
+ FINSR(sregs, LANE_CTRL_STS_REG(lane), 19, 19, 0x1);
+}
+
+static inline void kserdes_xge_lane_enable(struct kserdes_config *sc, u32 lane)
+{
+ u32 lane_ctrl_rate = sc->lane[lane].ctrl_rate;
+
+ /* Set Lane Control Rate */
+ if (sc->link_rate == KSERDES_LINK_RATE_10P3125G)
+ _kserdes_set_lane_ctrl_rate(sc->regs, lane, lane_ctrl_rate);
+ else if (sc->link_rate == KSERDES_LINK_RATE_1P25G)
+ kserdes_writel(sc->regs, LANE_CTRL_STS_REG(lane), 0xf800f8c0);
+
+ _kserdes_xge_enable_pcs(sc->regs, lane);
+
+ _kserdes_lane_enable(sc->regs, lane);
+
+ if (sc->lane[lane].loopback)
+ _kserdes_set_lane_loopback(sc->regs, lane, sc->link_rate);
+}
+
+static inline void _kserdes_enable_xgmii_port(struct regmap *peripheral_regmap,
+ u32 port)
+{
+ regmap_update_bits(peripheral_regmap, XGE_CTRL_OFFSET,
+ GENMASK(port, port), BIT(port));
+}
+
+static inline void _kserdes_reset_cdr(void __iomem *sregs, int lane)
+{
+ /* toggle signal detect */
+ _kserdes_force_signal_detect_low(sregs, lane);
+ mdelay(1);
+ _kserdes_force_signal_detect_high(sregs, lane);
+}
+
+/* Call every 10 ms */
+static int
+_kserdes_check_link_status(struct device *dev, void __iomem *sregs,
+ struct regmap *pcsr_regmap, u32 lanes,
+ u32 lanes_enable, u32 *current_state, u32 *lane_down)
+{
+ u32 pcsr_rx_stat, blk_lock, blk_errs;
+ int loss, i, status = 1;
+ int ret;
+
+ for (i = 0; i < lanes; i++) {
+ if (!(lanes_enable & (1 << i)))
+ continue;
+
+ /* Rx Signal Loss bit in serdes lane control and status reg*/
+ loss = (kserdes_readl(sregs, LANE_CTRL_STS_REG(i))) & 0x01;
+
+ /* Block Errors and Block Lock bits in PCSR rx status reg */
+ ret = regmap_read(pcsr_regmap, PCSR_RX_STATUS(i),
+ &pcsr_rx_stat);
+
+ if (ret)
+ return ret;
+
+ blk_lock = (pcsr_rx_stat >> 30) & 0x1;
+ blk_errs = (pcsr_rx_stat >> 16) & 0x0ff;
+
+ /* If Block error, attempt recovery! */
+ if (blk_errs)
+ blk_lock = 0;
+
+ switch (current_state[i]) {
+ case 0:
+ /* if good link lock the signal detect ON! */
+ if (!loss && blk_lock) {
+ dev_dbg(dev, "XGE PCSR Linked Lane: %d\n", i);
+ FINSR(sregs, LANEX_REG(i, 0x04), 2, 1, 0x3);
+ current_state[i] = 1;
+ } else {
+ /* if no lock, then reset CDR
+ * by toggling sig detect
+ */
+ if (!blk_lock) {
+ dev_dbg(dev,
+ "XGE PCSR Recover Lane: %d\n",
+ i);
+
+ _kserdes_reset_cdr(sregs, i);
+ }
+ }
+ break;
+ case 1:
+ if (!blk_lock) {
+ /* Link Lost? */
+ lane_down[i] = 1;
+ current_state[i] = 2;
+ }
+ break;
+ case 2:
+ if (blk_lock)
+ /* Nope just noise */
+ current_state[i] = 1;
+ else {
+ /* Lost the block lock, reset CDR if it is
+ * not centered and go back to sync state
+ */
+ _kserdes_reset_cdr(sregs, i);
+
+ current_state[i] = 0;
+ }
+ break;
+ default:
+ dev_info(dev, "XGE: unknown current_state[%d] %d\n",
+ i, current_state[i]);
+ break;
+ }
+
+ if (blk_errs) {
+ /* Reset the Error counts! */
+ regmap_update_bits(pcsr_regmap, PCSR_RX_CTL(i),
+ GENMASK(7, 0), 0x19);
+ regmap_update_bits(pcsr_regmap, PCSR_RX_CTL(i),
+ GENMASK(7, 0), 0x00);
+ }
+
+ status &= (current_state[i] == 1);
+ }
+
+ return status;
+}
+
+static int _kserdes_wait_link_up(struct device *dev, void __iomem *sregs,
+ struct regmap *pcsr_regmap,
+ u32 lanes, u32 lanes_enable)
+{
+ u32 current_state[KSERDES_MAX_LANES];
+ int retries = 0, link_up;
+ u32 lane_down[KSERDES_MAX_LANES];
+ int i;
+
+ if (lanes > KSERDES_MAX_LANES)
+ return -EINVAL;
+
+ memset(current_state, 0, sizeof(current_state));
+ memset(lane_down, 0, sizeof(lane_down));
+
+ do {
+ mdelay(10);
+ memset(lane_down, 0, sizeof(lane_down));
+
+ link_up = _kserdes_check_link_status(dev, sregs,
+ pcsr_regmap, lanes,
+ lanes_enable,
+ current_state, lane_down);
+
+ /* if we did not get link up then wait 100ms
+ * before calling it again
+ */
+ if (link_up)
+ break;
+
+ for (i = 0; i < lanes; i++) {
+ if ((lanes_enable & (1 << i)) && lane_down[i])
+ dev_dbg(dev,
+ "XGE: detected lane down on lane %d\n",
+ i);
+ }
+
+ if (++retries > 100)
+ return -ETIMEDOUT;
+
+ } while (!link_up);
+
+ dev_info(dev, "XGE: serdes link up: retried %d times\n", retries);
+ return 0;
+}
+
+static int kserdes_xge_lanes_enable(struct kserdes_config *sc)
+{
+ struct kserdes_offsets sofs;
+ int ret, i;
+ u32 lanes_enable = 0;
+
+ if (sc->firmware) {
+ /* firmware started in serdes_init and
+ * doesn't need lanes enable
+ */
+ return 0;
+ }
+
+ for (i = 0; i < sc->lanes; i++) {
+ if (!LANE_ENABLE(sc, i))
+ continue;
+
+ lanes_enable |= (1 << i);
+ }
+
+ kserdes_phy_patch(sc);
+ kserdes_xge_pll_enable(sc);
+
+ for_each_lane(kserdes_xge_lane_enable, sc);
+
+ ret = kserdes_get_status(sc);
+ if (ret) {
+ dev_err(sc->dev,
+ "kserdes_xge_lanes_enable get status FAILED %d\n", ret);
+ return ret;
+ }
+
+ kserdes_dfe_offset_calibration(sc, &sofs);
+
+ for (i = 0; i < sc->lanes; i++)
+ _kserdes_enable_xgmii_port(sc->peripheral_regmap, i);
+
+ _kserdes_wait_link_up(sc->dev, sc->regs, sc->pcsr_regmap,
+ sc->lanes, lanes_enable);
+
+ return lanes_enable;
+}
+
+static inline void kserdes_xfw_get_lane_params(struct kserdes_config *sc,
+ int lane)
+{
+ struct kserdes_fw_config *fw = &sc->fw;
+ u32 tx_ctrl, val_0, val_1;
+ u32 phy_a = PHY_A(sc->regs);
+
+ val_0 = kserdes_readl(sc->regs, LANEX_REG(lane, 0x04));
+ val_1 = kserdes_readl(sc->regs, LANEX_REG(lane, 0x08));
+
+ tx_ctrl = ((((val_0 >> 18) & 0x1) << 24) | /* TX_CTRL_O_24 */
+ (((val_1 >> 0) & 0xffff) << 8) | /* TX_CTRL_O_23_8 */
+ (((val_0 >> 24) & 0xff) << 0)); /* TX_CTRL_O_7_0 */
+
+ if (phy_a) {
+ fw->cm = (val_1 >> 12) & 0xf;
+ fw->c1 = (val_1 >> 0) & 0x1f;
+ fw->c2 = (val_1 >> 8) & 0xf;
+ } else {
+ fw->cm = (tx_ctrl >> 16) & 0xf;
+ fw->c1 = (tx_ctrl >> 8) & 0x1f;
+ fw->c2 = (tx_ctrl >> 13) & 0x7;
+ fw->c2 = fw->c2 | (((tx_ctrl >> 24) & 0x1) << 3);
+ }
+
+ val_0 = _kserdes_read_select_tbus(sc->regs, lane + 1,
+ (phy_a ? 0x11 : 0x10));
+ fw->attn = (val_0 >> 4) & 0xf;
+ fw->boost = (val_0 >> 8) & 0xf;
+
+ val_0 = _kserdes_read_select_tbus(sc->regs, lane + 1, 0x5);
+ fw->dlpf = (val_0 >> 2) & 0x3ff;
+
+ val_0 = _kserdes_read_select_tbus(sc->regs, lane + 1, 0x6);
+ fw->cdrcal = (val_0 >> 3) & 0xff;
+}
+
+static inline void kserdes_xfw_mem_init(struct kserdes_config *sc)
+{
+ struct kserdes_fw_config *fw = &sc->fw;
+ u32 i, lane_config = 0, lanes = sc->lanes;
+
+ for (i = 0; i < lanes; i++)
+ lane_config = (lane_config << 8) |
+ (fw->lane_config[i] & 0xff);
+
+ lane_config <<= 8;
+
+ /* initialize internal parameter area */
+ kserdes_writel(sc->regs, MEM_ADR_REG, KSERDES_XFW_CONFIG_START_ADDR);
+
+ /* clean out unused config area */
+ for (i = KSERDES_XFW_CONFIG_START_ADDR;
+ i < KSERDES_XFW_PARAM_START_ADDR; i += 4)
+ kserdes_writel(sc->regs, MEM_DATINC_REG, 0x00000000);
+
+ /* Flush 64 bytes 10,11,12,13 */
+ kserdes_writel(sc->regs, MEM_DATINC_REG, 0x00009C9C);
+
+ /* fast train */
+ kserdes_writel(sc->regs, MEM_DATINC_REG, fw->fast_train);
+
+ kserdes_writel(sc->regs, MEM_DATINC_REG, 0x00000000);
+ /* lane seeds */
+ kserdes_writel(sc->regs, MEM_DATINC_REG, fw->lane_seeds);
+ /* lane config */
+ kserdes_writel(sc->regs, MEM_DATINC_REG, lane_config);
+}
+
+static int kserdes_xge_init(struct kserdes_config *sc)
+{
+ return kserdes_load_init_fw(sc, ks2_xgbe_serdes_firmwares,
+ ARRAY_SIZE(ks2_xgbe_serdes_firmwares));
+}
+
+static int kserdes_pcie_lanes_enable(struct kserdes_config *sc)
+{
+ int ret, i;
+ u32 lanes_enable = 0;
+
+ for (i = 0; i < sc->lanes; i++) {
+ if (!LANE_ENABLE(sc, i))
+ continue;
+
+ lanes_enable |= (1 << i);
+ }
+
+ for (i = 0; i < sc->lanes; i++) {
+ kserdes_release_reset(sc, i);
+
+ if (sc->lane[i].loopback)
+ _kserdes_set_lane_loopback(sc->regs, i, sc->link_rate);
+ }
+
+ ret = kserdes_get_status(sc);
+ if (ret)
+ return ret;
+ else
+ return lanes_enable;
+}
+
+static int kserdes_pcie_init(struct kserdes_config *sc)
+{
+ return kserdes_load_init_fw(sc, ks2_pcie_serdes_firmwares,
+ ARRAY_SIZE(ks2_pcie_serdes_firmwares));
+}
+
+static int kserdes_lanes_enable(struct kserdes_config *sc)
+{
+ switch (sc->phy_type) {
+ case KSERDES_PHY_SGMII:
+ return kserdes_sgmii_lanes_enable(sc);
+ case KSERDES_PHY_XGE:
+ return kserdes_xge_lanes_enable(sc);
+ case KSERDES_PHY_PCIE:
+ return kserdes_pcie_lanes_enable(sc);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int kserdes_init(struct phy *phy)
+{
+ struct kserdes_dev *sd = phy_get_drvdata(phy);
+ struct kserdes_config *sc = &sd->sc;
+ int ret;
+
+ switch (sc->phy_type) {
+ case KSERDES_PHY_SGMII:
+ ret = kserdes_sgmii_init(sc);
+ break;
+ case KSERDES_PHY_XGE:
+ ret = kserdes_xge_init(sc);
+ break;
+ case KSERDES_PHY_PCIE:
+ ret = kserdes_pcie_init(sc);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ if (ret < 0) {
+ dev_err(sd->dev, "serdes initialization failed %d\n", ret);
+ goto done;
+ }
+
+ ret = kserdes_lanes_enable(sc);
+ if (ret < 0) {
+ dev_err(sd->dev, "serdes lanes enable failed: %d\n", ret);
+ goto done;
+ }
+
+ dev_dbg(sd->dev, "serdes config done lanes(mask) 0x%x\n", ret);
+
+done:
+ return ret;
+}
+
+static int kserdes_of_parse_lane(struct device *dev,
+ struct device_node *np,
+ struct kserdes_config *sc)
+{
+ struct kserdes_lane_config *lc;
+ struct kserdes_equalizer *eq;
+ struct kserdes_tx_coeff *tc;
+ int lane_num, ret;
+
+ ret = of_property_read_u32(np, "reg", &lane_num);
+ if (ret) {
+ dev_err(dev, "Failed to parse reg\n");
+ return -EINVAL;
+ }
+
+ if (lane_num >= sc->lanes) {
+ dev_err(dev, "Invalid lane number %u\n", lane_num);
+ return -EINVAL;
+ }
+
+ lc = &sc->lane[lane_num];
+ lc->enable = true;
+ dev_dbg(dev, "lane %d enabled\n", lane_num);
+
+ if (of_property_read_u32(np, "control-rate", &lc->ctrl_rate)) {
+ dev_info(dev, "use default lane control-rate: %u\n",
+ lc->ctrl_rate);
+ }
+ dev_dbg(dev, "lane control-rate: %d\n", lc->ctrl_rate);
+
+ if (of_find_property(np, "loopback", NULL))
+ lc->loopback = true;
+ else
+ lc->loopback = false;
+
+ dev_dbg(dev, "lane loopback: %d\n", lc->loopback);
+
+ eq = &lc->rx_start;
+ if (of_property_read_u32_array(np, "rx-start", &eq->att, 2)) {
+ dev_info(dev, "use default lane rx-start 0 0\n");
+ eq->att = 0;
+ eq->boost = 0;
+ }
+ dev_dbg(dev, "lane rx-start: %d %d\n", eq->att, eq->boost);
+
+ eq = &lc->rx_force;
+ if (of_property_read_u32_array(np, "rx-force", &eq->att, 2)) {
+ dev_info(dev, "use default lane rx-force 0 0\n");
+ eq->att = 0;
+ eq->boost = 0;
+ }
+ dev_dbg(dev, "lane rx-force: %d %d\n", eq->att, eq->boost);
+
+ tc = &lc->tx_coeff;
+ if (of_property_read_u32_array(np, "tx-coeff", &tc->c1, 5)) {
+ dev_info(dev, "use default tx-coeff 0\n");
+ tc->c1 = 0;
+ }
+ dev_dbg(dev, "tx-coeff: %d %d %d %d %d\n",
+ tc->c1, tc->c2, tc->cm, tc->att, tc->vreg);
+
+ return 0;
+}
+
+static void kserdes_set_sgmii_defaults(struct kserdes_config *sc)
+{
+ int i;
+
+ sc->link_rate = KSERDES_LINK_RATE_1P25G;
+ sc->lanes = 4;
+ sc->rx_force_enable = false;
+
+ for (i = 0; i < sc->lanes; i++) {
+ memset(&sc->lane[i], 0, sizeof(sc->lane[i]));
+ sc->lane[i].ctrl_rate = KSERDES_QUARTER_RATE;
+ }
+}
+
+static void kserdes_set_xge_defaults(struct kserdes_config *sc)
+{
+ int i;
+
+ sc->link_rate = KSERDES_LINK_RATE_10P3125G;
+ sc->lanes = 2;
+ sc->rx_force_enable = false;
+
+ for (i = 0; i < sc->lanes; i++) {
+ memset(&sc->lane[i], 0, sizeof(sc->lane[i]));
+ sc->lane[i].ctrl_rate = KSERDES_FULL_RATE;
+ }
+}
+
+static void kserdes_set_pcie_defaults(struct kserdes_config *sc)
+{
+ int i;
+
+ sc->link_rate = KSERDES_LINK_RATE_5G;
+ sc->lanes = 2;
+ sc->rx_force_enable = false;
+
+ for (i = 0; i < sc->lanes; i++)
+ memset(&sc->lane[i], 0, sizeof(sc->lane[i]));
+}
+
+static void kserdes_set_defaults(struct kserdes_config *sc,
+ enum KSERDES_PHY_TYPE phy_type)
+{
+ switch (phy_type) {
+ case KSERDES_PHY_SGMII:
+ kserdes_set_sgmii_defaults(sc);
+ break;
+ case KSERDES_PHY_XGE:
+ kserdes_set_xge_defaults(sc);
+ break;
+ case KSERDES_PHY_PCIE:
+ kserdes_set_pcie_defaults(sc);
+ break;
+ default:
+ break;
+ }
+}
+
+static int kserdes_of_parse(struct kserdes_dev *sd,
+ struct device_node *np)
+{
+ struct kserdes_config *sc = &sd->sc;
+ struct device_node *lanes_np, *child;
+ struct device *dev = sd->dev;
+ struct resource res;
+ void __iomem *regs;
+ int ret;
+
+ ret = of_address_to_resource(np, SERDES_REG_INDEX, &res);
+ if (ret) {
+ dev_err(dev, "Can't xlate serdes reg addr of node(%s)\n",
+ np->name);
+ return ret;
+ }
+
+ regs = devm_ioremap_resource(dev, &res);
+ if (IS_ERR(regs)) {
+ dev_err(dev, "Failed to map serdes register base\n");
+ return PTR_ERR(regs);
+ }
+ sc->regs = regs;
+
+ if (of_device_is_compatible(np, "ti,keystone-serdes-gbe")) {
+ sc->phy_type = KSERDES_PHY_SGMII;
+ } else if (of_device_is_compatible(np, "ti,keystone-serdes-xgbe")) {
+ sc->phy_type = KSERDES_PHY_XGE;
+ } else if (of_device_is_compatible(np, "ti,keystone-serdes-pcie")) {
+ sc->phy_type = KSERDES_PHY_PCIE;
+ } else {
+ dev_err(dev, "unknown phy type\n");
+ return -EINVAL;
+ }
+
+ sc->dev = dev;
+
+ /* Set the defaults base on phy type */
+ kserdes_set_defaults(sc, sc->phy_type);
+
+ sc->peripheral_regmap =
+ syscon_regmap_lookup_by_phandle(np, "syscon-peripheral");
+ if (!sc->peripheral_regmap && IS_ERR(sc->peripheral_regmap)) {
+ dev_err(sc->dev,
+ "failed to get syscon-peripheral regmap\n");
+ return PTR_ERR(sc->peripheral_regmap);
+ }
+
+ sc->pcsr_regmap = syscon_regmap_lookup_by_phandle(np, "syscon-link");
+ if (!sc->pcsr_regmap && IS_ERR(sc->pcsr_regmap)) {
+ dev_err(sc->dev,
+ "failed to get syscon-link regmap\n");
+ return PTR_ERR(sc->pcsr_regmap);
+ }
+
+ if (of_property_read_u32(np, "link-rate-kbps", &sc->link_rate)) {
+ dev_info(dev, "use default link-rate-kbps: %u\n",
+ sc->link_rate);
+ }
+
+ if (of_property_read_u32(np, "num-lanes", &sc->lanes))
+ dev_info(dev, "use default num-lanes %d\n", sc->lanes);
+
+ if (sc->lanes > KSERDES_MAX_LANES) {
+ sc->lanes = KSERDES_MAX_LANES;
+ dev_info(dev, "use max allowed lanes %d\n", sc->lanes);
+ }
+
+ if (of_property_read_bool(np, "rx-force-enable"))
+ sc->rx_force_enable = true;
+ else
+ sc->rx_force_enable = false;
+
+ lanes_np = of_get_child_by_name(np, "lanes");
+ if (lanes_np) {
+ for_each_available_child_of_node(lanes_np, child) {
+ ret = kserdes_of_parse_lane(dev, child, sc);
+ if (ret) {
+ of_node_put(child);
+ of_node_put(lanes_np);
+ return ret;
+ }
+ of_node_put(child);
+ }
+ of_node_put(lanes_np);
+ }
+
+ return 0;
+}
+
+static struct phy_ops kserdes_ops = {
+ .init = kserdes_init,
+ .owner = THIS_MODULE,
+};
+
+static int kserdes_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct kserdes_dev *sd;
+ struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ int ret;
+
+ sd = devm_kzalloc(dev, sizeof(*sd), GFP_KERNEL);
+ if (!sd)
+ return -ENOMEM;
+
+ sd->dev = dev;
+
+ ret = kserdes_of_parse(sd, np);
+ if (ret)
+ return ret;
+
+ dev_set_drvdata(dev, sd);
+ sd->phy = devm_phy_create(dev, NULL, &kserdes_ops);
+ if (IS_ERR(sd->phy))
+ return PTR_ERR(sd->phy);
+
+ phy_set_drvdata(sd->phy, sd);
+ phy_provider = devm_of_phy_provider_register(sd->dev,
+ of_phy_simple_xlate);
+
+ if (IS_ERR(phy_provider))
+ return PTR_ERR_OR_ZERO(phy_provider);
+
+ dev_vdbg(&pdev->dev, "probed");
+ return 0;
+}
+
+static const struct of_device_id kserdes_of_match[] = {
+ { .compatible = "ti,keystone-serdes-gbe" },
+ { .compatible = "ti,keystone-serdes-pcie" },
+ { .compatible = "ti,keystone-serdes-xgbe" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, kserdes_of_match);
+
+static struct platform_driver kserdes_driver = {
+ .probe = kserdes_probe,
+ .driver = {
+ .of_match_table = kserdes_of_match,
+ .name = "ti,keystone-serdes",
+ }
+};
+
+static int __init keystone_serdes_phy_init(void)
+{
+ return platform_driver_register(&kserdes_driver);
+}
+module_init(keystone_serdes_phy_init);
+
+static void __exit keystone_serdes_phy_exit(void)
+{
+ platform_driver_unregister(&kserdes_driver);
+}
+module_exit(keystone_serdes_phy_exit);
+
+MODULE_AUTHOR("WingMan Kwok <w-kwok2@ti.com>");
+MODULE_DESCRIPTION("TI Keystone SerDes driver");
+MODULE_LICENSE("GPL");
--
1.7.9.5