Linux-libre 4.4-gnupck-4.4-gnu

1 files changed, 158 insertions, 0 deletions

diff --git a/drivers/net/phy/bcm-cygnus.c b/drivers/net/phy/bcm-cygnus.c
new file mode 100644
index 000000000..49bbc6826
--- /dev/null
+++ b/drivers/net/phy/bcm-cygnus.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2015 Broadcom Corporation
+ *
+ * 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.
+ */
+
+/* Broadcom Cygnus SoC internal transceivers support. */
+#include "bcm-phy-lib.h"
+#include <linux/brcmphy.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+
+/* Broadcom Cygnus Phy specific registers */
+#define MII_BCM_CYGNUS_AFE_VDAC_ICTRL_0  0x91E5 /* VDAL Control register */
+
+static int bcm_cygnus_afe_config(struct phy_device *phydev)
+{
+	int rc;
+
+	/* ensure smdspclk is enabled */
+	rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, 0x0c30);
+	if (rc < 0)
+		return rc;
+
+	/* AFE_VDAC_ICTRL_0 bit 7:4 Iq=1100 for 1g 10bt, normal modes */
+	rc = bcm_phy_write_misc(phydev, 0x39, 0x01, 0xA7C8);
+	if (rc < 0)
+		return rc;
+
+	/* AFE_HPF_TRIM_OTHERS bit11=1, short cascode enable for all modes*/
+	rc = bcm_phy_write_misc(phydev, 0x3A, 0x00, 0x0803);
+	if (rc < 0)
+		return rc;
+
+	/* AFE_TX_CONFIG_1 bit 7:4 Iq=1100 for test modes */
+	rc = bcm_phy_write_misc(phydev, 0x3A, 0x01, 0xA740);
+	if (rc < 0)
+		return rc;
+
+	/* AFE TEMPSEN_OTHERS rcal_HT, rcal_LT 10000 */
+	rc = bcm_phy_write_misc(phydev, 0x3A, 0x03, 0x8400);
+	if (rc < 0)
+		return rc;
+
+	/* AFE_FUTURE_RSV bit 2:0 rccal <2:0>=100 */
+	rc = bcm_phy_write_misc(phydev, 0x3B, 0x00, 0x0004);
+	if (rc < 0)
+		return rc;
+
+	/* Adjust bias current trim to overcome digital offSet */
+	rc = phy_write(phydev, MII_BRCM_CORE_BASE1E, 0x02);
+	if (rc < 0)
+		return rc;
+
+	/* make rcal=100, since rdb default is 000 */
+	rc = bcm_phy_write_exp(phydev, MII_BRCM_CORE_EXPB1, 0x10);
+	if (rc < 0)
+		return rc;
+
+	/* CORE_EXPB0, Reset R_CAL/RC_CAL Engine */
+	rc = bcm_phy_write_exp(phydev, MII_BRCM_CORE_EXPB0, 0x10);
+	if (rc < 0)
+		return rc;
+
+	/* CORE_EXPB0, Disable Reset R_CAL/RC_CAL Engine */
+	rc = bcm_phy_write_exp(phydev, MII_BRCM_CORE_EXPB0, 0x00);
+
+	return 0;
+}
+
+static int bcm_cygnus_config_init(struct phy_device *phydev)
+{
+	int reg, rc;
+
+	reg = phy_read(phydev, MII_BCM54XX_ECR);
+	if (reg < 0)
+		return reg;
+
+	/* Mask interrupts globally. */
+	reg |= MII_BCM54XX_ECR_IM;
+	rc = phy_write(phydev, MII_BCM54XX_ECR, reg);
+	if (rc)
+		return rc;
+
+	/* Unmask events of interest */
+	reg = ~(MII_BCM54XX_INT_DUPLEX |
+		MII_BCM54XX_INT_SPEED |
+		MII_BCM54XX_INT_LINK);
+	rc = phy_write(phydev, MII_BCM54XX_IMR, reg);
+	if (rc)
+		return rc;
+
+	/* Apply AFE settings for the PHY */
+	rc = bcm_cygnus_afe_config(phydev);
+	if (rc)
+		return rc;
+
+	/* Advertise EEE */
+	rc = bcm_phy_enable_eee(phydev);
+	if (rc)
+		return rc;
+
+	/* Enable APD */
+	return bcm_phy_enable_apd(phydev, false);
+}
+
+static int bcm_cygnus_resume(struct phy_device *phydev)
+{
+	int rc;
+
+	genphy_resume(phydev);
+
+	/* Re-initialize the PHY to apply AFE work-arounds and
+	 * configurations when coming out of suspend.
+	 */
+	rc = bcm_cygnus_config_init(phydev);
+	if (rc)
+		return rc;
+
+	/* restart auto negotiation with the new settings */
+	return genphy_config_aneg(phydev);
+}
+
+static struct phy_driver bcm_cygnus_phy_driver[] = {
+{
+	.phy_id        = PHY_ID_BCM_CYGNUS,
+	.phy_id_mask   = 0xfffffff0,
+	.name          = "Broadcom Cygnus PHY",
+	.features      = PHY_GBIT_FEATURES |
+			SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+	.config_init   = bcm_cygnus_config_init,
+	.config_aneg   = genphy_config_aneg,
+	.read_status   = genphy_read_status,
+	.ack_interrupt = bcm_phy_ack_intr,
+	.config_intr   = bcm_phy_config_intr,
+	.suspend       = genphy_suspend,
+	.resume        = bcm_cygnus_resume,
+} };
+
+static struct mdio_device_id __maybe_unused bcm_cygnus_phy_tbl[] = {
+	{ PHY_ID_BCM_CYGNUS, 0xfffffff0, },
+	{ }
+};
+MODULE_DEVICE_TABLE(mdio, bcm_cygnus_phy_tbl);
+
+module_phy_driver(bcm_cygnus_phy_driver);
+
+MODULE_DESCRIPTION("Broadcom Cygnus internal PHY driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Broadcom Corporation");