From: Kirill Kranke <kirill.kra...@gmail.com>
Current generic PHY driver does not work with TJA1100 BroadR-REACH PHY
properly. TJA1100 does not have any standard ability enabled at MII_BMSR
register. Instead it has BroadR-REACH ability at MII_ESTATUS enabled, which
is not handled by generic driver yet. Therefore generic driver is unable to
guess required link speed, duplex etc. Device is started up with 10Mbps
halfduplex which is incorrect.
BroadR-REACH able flag is not specified in IEEE802.3-2015. Which is why I
did not add BroadR-REACH able flag support at generic driver. Once
BroadR-REACH able flag gets into IEEE802.3 it should be reasonable to
support it in the generic PHY driver.
Signed-off-by: Kirill Kranke <kirill.kra...@gmail.com>
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 343989f..7014eb7 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -422,6 +422,14 @@ config TERANETICS_PHY
---help---
Currently supports the Teranetics TN2020
+config TJA1100_PHY
+ tristate "NXP TJA1100 PHY"
+ help
+ Support of NXP TJA1100 BroadR-REACH ethernet PHY.
+ Generic driver is not suitable for TJA1100 PHY while the PHY does not
+ advertise any standard IEEE capabilities. It uses BroadR-REACH able
+ flag instead. This driver configures capabilities of the PHY properly.
+
config VITESSE_PHY
tristate "Vitesse PHYs"
---help---
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 5805c0b..4d2a69d 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -83,5 +83,6 @@ obj-$(CONFIG_ROCKCHIP_PHY) += rockchip.o
obj-$(CONFIG_SMSC_PHY) += smsc.o
obj-$(CONFIG_STE10XP) += ste10Xp.o
obj-$(CONFIG_TERANETICS_PHY) += teranetics.o
+obj-$(CONFIG_TJA1100_PHY) += tja1100.o
obj-$(CONFIG_VITESSE_PHY) += vitesse.o
obj-$(CONFIG_XILINX_GMII2RGMII) += xilinx_gmii2rgmii.o
diff --git a/drivers/net/phy/tja1100.c b/drivers/net/phy/tja1100.c
new file mode 100644
index 0000000..081b580
--- /dev/null
+++ b/drivers/net/phy/tja1100.c
@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-2.0
+/* tja1100.c: TJA1100 BoardR-REACH PHY driver.
+ *
+ * Copyright (c) 2017 Kirill Kranke <kirill.kra...@gmail.com>
+ * Author: Kirill Kranke <kirill.kra...@gmail.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/phy.h>
+
+/* TJA1100 specific registers */
+#define TJA1100_ECTRL 0x11 /* Extended control register */
+#define TJA1100_CFG1 0x12 /* Configuration register 1 */
+#define TJA1100_CFG2 0x13 /* Configuration register 2 */
+#define TJA1100_SERRCNT 0x14 /* Symbol error counter register 2 */
+#define TJA1100_INTST 0x15 /* Interrupt status register */
+#define TJA1100_INTEN 0x16 /* Interrupt enable register */
+#define TJA1100_COMST 0x17 /* Communication status register */
+#define TJA1100_GST 0x18 /* General status register */
+#define TJA1100_EXTST 0x19 /* External status register */
+#define TJA1100_LFCNT 0x1a /* Link fail counter register */
+
+/* Extended control register */
+#define ECTRL_LC 0x8000 /* link control enable */
+#define ECTRL_PM 0x7800 /* operating mode select */
+#define ECTRL_PM_NOCNG 0x0000 /* PM == 0000: no change */
+#define ECTRL_PM_NORMAL 0x1800 /* PM == 0011: Normal mode */
+#define ECTRL_PM_STANBY 0x6000 /* PM == 1100: Standby mode */
+#define ECTRL_PM_SREQ 0x5800 /* PM == 1011: Sleep Request mode */
+#define ECTRL_SJ_TST 0x0400 /* enable/disable Slave jitter test */
+#define ECTRL_TR_RST 0x0200 /* Autonegotiation process restart */
+#define ECTRL_TST_MODE 0x01c0 /* test mode selection */
+#define ECTRL_C_TST 0x0020 /* TDR-based cable test */
+#define ECTRL_LOOPBACK 0x0018 /* loopback mode select */
+#define ECTRL_CFGEN 0x0004 /* configuration register access */
+#define ECTRL_CFGINH 0x0002 /* INH configuration */
+#define ECTRL_WAKE_REQ 0x0001 /* wake-up request configuration */
+
+/* Configuration register 1 */
+#define CFG1_MS 0x8000 /* PHY Master/Slave configuration */
+#define CFG1_AUTO_OP 0x4000 /* managed/autonomous operation */
+#define CFG1_LINKLEN 0x2000 /* cable length: 0 < 15 m; 1 > 15 m */
+#define CFG1_TXAMP 0x0c00 /* nominal transmit amplitude */
+#define CFG1_TXAMP_050 0x0000 /* TXAMP == 00: 500 mV */
+#define CFG1_TXAMP_075 0x0200 /* TXAMP == 01: 750 mV */
+#define CFG1_TXAMP_100 0x0400 /* TXAMP == 10: 1000 mV */
+#define CFG1_TXAMP_125 0x0c00 /* TXAMP == 11: 1250 mV */
+#define CFG1_MODE 0x0300 /* MII/RMII mode */
+#define CFG1_DRIVER 0x0080 /* MII output driver strength */
+#define CFG1_SC 0x0040 /* sleep confirmation setting */
+#define CFG1_LED_MODE 0x0030 /* LED mode */
+#define CFG1_LED_EN 0x0008 /* LED enable */
+#define CFG1_CFG_WAKE 0x0004 /* local wake configuration */
+#define CFG1_APWD 0x0002 /* autonomous power down */
+#define CFG1_LPS 0x0001 /* LPS code group reception */
+
+/* Configuration register 2 */
+#define CFG2_PHYAD_4_0 0xf800 /* PHY address used for the SMI addr */
+#define CFG2_SNR_AVG 0x0600 /* signal-to-noise ratio averaging */
+#define CFG2_SNR_WLIM 0x01c0 /* signal-to-noise ratio warning limit */
+#define CFG2_SNR_FLIM 0x0038 /* signal-to-noise ratio fail limit */
+#define CFG2_JUMBO_EN 0x0004 /* Jumbo packet support */
+#define CFG2_SRTO 0x0003 /* sleep request time-out */
+#define CFG2_SRTO_04 0x0000 /* SRTO == 00: 0.4 ms */
+#define CFG2_SRTO_1 0x0001 /* SRTO == 01: 1 ms */
+#define CFG2_SRTO_4 0x0002 /* SRTO == 10: 4 ms */
+#define CFG2_SRTO_16 0x0003 /* SRTO == 11: 16 ms */
+
+/* Symbol error counter register 2 */
+#define SERRCNT_SEC 0xffff /* The symbol error counter */
+
+/* Interrupt status register */
+#define INTST_PWON 0x8000 /* power-on detected */
+#define INTST_WAKEUP 0x4000 /* local or remote wake-up detected */
+#define INTST_WUR 0x2000 /* dedicated wake-up request detected */
+#define INTST_LPS 0x1000 /* LPS code groups received */
+#define INTST_PIF 0x0800 /* PHY initialization error detected */
+#define INTST_LINK_FAIL 0x0400 /* link status changed to ‘link fail’ */
+#define INTST_LINK_UP 0x0200 /* link status changed to ‘link up’ */
+#define INTST_SYM_ERR 0x0100 /* symbol error detected */
+#define INTST_TF 0x0080 /* training phase failure detected */
+#define INTST_SNRW 0x0040 /* SNR value above warning limit */
+#define INTST_CTRL_ERR 0x0020 /* SMI control error detected */
+#define INTST_TXENC 0x0010 /* TXEN clamping detected */
+#define INTST_UV_ERR 0x0008 /* undervoltage detected */
+#define INTST_UVR 0x0004 /* undervoltage recovery detected */
+#define INTST_TEMP_ERR 0x0002 /* overtemperature error detected */
+#define INTST_SA 0x0001 /* transition to Normal on timer expiring */
+
+/* Interrupt enable register */
+#define INTEN_PWON 0x8000 /* PWON interrupt enable */
+#define INTEN_WAKEUP 0x4000 /* WAKEUP interrupt enable */
+#define INTEN_WUR 0x2000 /* WUR_RECEIVED interrupt enable */
+#define INTEN_LPS 0x1000 /* LPS_RECEIVED interrupt enable */
+#define INTEN_PIF 0x0800 /* PHY_INIT_FAIL interrupt enable */
+#define INTEN_LINK_FAIL 0x0400 /* LINK_STATUS_FAIL interrupt enable */
+#define INTEN_LINK_UP 0x0200 /* LINK_STATUS_UP interrupt enable */
+#define INTEN_SYM_ERR 0x0100 /* SYM_ERR interrupt enable */
+#define INTEN_TF 0x0080 /* TRAINING_FAILED interrupt enable */
+#define INTEN_SNRW 0x0040 /* SNR_WARNING interrupt enable */
+#define INTEN_CTRL_ERR 0x0020 /* CONTROL_ERR interrupt enable */
+#define INTEN_TXENC 0x0010 /* TXEN_CLAMPED interrupt enable */
+#define INTEN_UV_ERR 0x0008 /* UV_ERR interrupt enable */
+#define INTEN_UVR 0x0004 /* UV_RECOVERY interrupt enable */
+#define INTEN_TEMP_ERR 0x0002 /* TEMP_ERR interrupt enable */
+#define INTEN_SA 0x0001 /* SLEEP_ABORT interrupt enable */
+
+/* Communication status register */
+#define COMST_LINK_UP 0x8000 /* link OK */
+#define COMST_TXM 0x6000 /* transmitter mode */
+#define COMST_TXM_DIS 0x0000 /* TXM == 00: transmitter disabled */
+#define COMST_TXM_DIS 0x0000 /* TXM == 01: transmitter in SEND_N mode */
+#define COMST_TXM_DIS 0x0000 /* TXM == 10: transmitter in SEND_I mode */
+#define COMST_TXM_DIS 0x0000 /* TXM == 11: transmitter in SEND_Z mode */
+#define COMST_LR 0x1000 /* local receiver OK */
+#define COMST_RR 0x0800 /* remote receiver OK */
+#define COMST_SCRL 0x0400 /* descrambler locked */
+#define COMST_SSD_ERR 0x0200 /* SSD error detected */
+#define COMST_ESD_ERR 0x0100 /* ESD error detected */
+#define COMST_SNR 0x00e0 /* SNR link status */
+#define COMST_RX_ERR 0x0010 /* receive error detected since last read */
+#define COMST_TX_ERR 0x0080 /* transmit error detected since last read */
+#define COMST_PS 0x0007 /* PHY state */
+
+/* General status register */
+#define GST_INTP 0x8000 /* unmasked interrupt pending */
+#define GST_PLL_LOCKED 0x4000 /* PLL stable and locked */
+#define GST_LWU 0x2000 /* local wake-up detected */
+#define GST_RWU 0x1000 /* remote wake-up detected */
+#define GST_DDWU 0x0800 /* data detected at MDI in Sleep Request mode */
+#define GST_EN 0x0400 /* EN switched LOW since last read */
+#define GST_RST 0x0200 /* hardware reset detected since last
read */
+#define GST_LF_CNT 0x00f8 /* number of link fails since last read */
+
+/* External status register */
+#define EXTST_UVDDA_3V3 0x4000 /* undervoltage detected on pin
VDDA(3V3) */
+#define EXTST_UVDDD_1V8 0x2000 /* undervoltage detected on pin
VDDD(1V8) */
+#define EXTST_UVDDA_1V8 0x1000 /* undervoltage detected on pin
VDDA(1V8) */
+#define EXTST_UVDDIO 0x0800 /* undervoltage detected on pin VDD(IO) */
+#define EXTST_TH 0x0400 /* temperature above high level */
+#define EXTST_TW 0x0200 /* temperature above warning level */
+#define EXTST_SD 0x0100 /* short circuit detected since last read */
+#define EXTST_OD 0x0080 /* open circuit detected since last read */
+#define EXTST_INTDET 0x0040 /* interleave order detection */
+
+/* Link fail counter register */
+#define LFCNT_LRC 0xff00 /* incremented when local receiver is NOT_OK */
+#define LFCNT_RRC 0x00ff /* incremented when remote receiver is NOT_OK */
+
+static int tja1100_phy_config_init(struct phy_device *phydev)
+{
+ u32 features;
+
+ /* TJA1100 has only 100BASE-BroadR-REACH ability specified at
+ * MII_ESTATUS register. Standard modes are not supported. Therefore
+ * BroadR-REACH allow only 100Mbps full duplex without autoneg.
+ */
+ features = SUPPORTED_MII;
+ features |= SUPPORTED_100baseT_Full;
+
+ phydev->supported &= features;
+ phydev->advertising &= features;
+ phydev->autoneg = AUTONEG_DISABLE;
+ phydev->speed = SPEED_100;
+ phydev->duplex = DUPLEX_FULL;
+
+ return 0;
+}
+
+static int tja1100_phy_config_aneg(struct phy_device *phydev)
+{
+ if (phydev->autoneg == AUTONEG_ENABLE) {
+ pr_err("TJA1100: autonegotiation is not supported\n");
+ return -1;
+ }
+
+ if (phydev->speed != SPEED_100 || phydev->duplex != DUPLEX_FULL) {
+ pr_err("TJA1100: only 100MBps Full Duplex allowed\n");
+ return -2;
+ }
+
+ return 0;
+}
+
+static struct phy_driver tja1100_phy_driver[] = {
+ {
+ .phy_id = 0x0180dc48,
+ .phy_id_mask = 0xfffffff0,
+ .name = "NXP TJA1100",
+
+ .features = SUPPORTED_100baseT_Full | SUPPORTED_MII,
+
+ .config_aneg = tja1100_phy_config_aneg,
+ .read_status = genphy_read_status,
+ .config_init = tja1100_phy_config_init,
+ .soft_reset = genphy_soft_reset,
+
+ .suspend = genphy_suspend,
+ .resume = genphy_resume,
+ }
+};
+
+module_phy_driver(tja1100_phy_driver);
+
+MODULE_DESCRIPTION("NXP TJA1100 driver");
+MODULE_AUTHOR("Kirill Kranke <kkra...@topcon.com>");
+MODULE_LICENSE("GPL");
+
+static struct mdio_device_id __maybe_unused nxp_tbl[] = {
+ { 0x0180dc48, 0xfffffff0 },
+ {}
+};
+
+MODULE_DEVICE_TABLE(mdio, nxp_tbl);
