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https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
374 lines
9.5 KiB
C
374 lines
9.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Broadcom PHY drivers
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*
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* Copyright 2010-2011 Freescale Semiconductor, Inc.
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* author Andy Fleming
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*/
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#include <config.h>
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#include <common.h>
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#include <phy.h>
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/* Broadcom BCM54xx -- taken from linux sungem_phy */
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#define MIIM_BCM54xx_AUXCNTL 0x18
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#define MIIM_BCM54xx_AUXCNTL_ENCODE(val) (((val & 0x7) << 12)|(val & 0x7))
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#define MIIM_BCM54xx_AUXSTATUS 0x19
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#define MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK 0x0700
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#define MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT 8
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#define MIIM_BCM54XX_SHD 0x1c
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#define MIIM_BCM54XX_SHD_WRITE 0x8000
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#define MIIM_BCM54XX_SHD_VAL(x) ((x & 0x1f) << 10)
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#define MIIM_BCM54XX_SHD_DATA(x) ((x & 0x3ff) << 0)
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#define MIIM_BCM54XX_SHD_WR_ENCODE(val, data) \
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(MIIM_BCM54XX_SHD_WRITE | MIIM_BCM54XX_SHD_VAL(val) | \
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MIIM_BCM54XX_SHD_DATA(data))
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#define MIIM_BCM54XX_EXP_DATA 0x15 /* Expansion register data */
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#define MIIM_BCM54XX_EXP_SEL 0x17 /* Expansion register select */
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#define MIIM_BCM54XX_EXP_SEL_SSD 0x0e00 /* Secondary SerDes select */
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#define MIIM_BCM54XX_EXP_SEL_ER 0x0f00 /* Expansion register select */
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#define MIIM_BCM_AUXCNTL_SHDWSEL_MISC 0x0007
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#define MIIM_BCM_AUXCNTL_ACTL_SMDSP_EN 0x0800
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#define MIIM_BCM_CHANNEL_WIDTH 0x2000
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static void bcm_phy_write_misc(struct phy_device *phydev,
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u16 reg, u16 chl, u16 value)
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{
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int reg_val;
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
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MIIM_BCM_AUXCNTL_SHDWSEL_MISC);
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reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL);
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reg_val |= MIIM_BCM_AUXCNTL_ACTL_SMDSP_EN;
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, reg_val);
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reg_val = (chl * MIIM_BCM_CHANNEL_WIDTH) | reg;
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL, reg_val);
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA, value);
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}
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/* Broadcom BCM5461S */
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static int bcm5461_config(struct phy_device *phydev)
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{
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genphy_config_aneg(phydev);
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phy_reset(phydev);
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return 0;
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}
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static int bcm54xx_parse_status(struct phy_device *phydev)
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{
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unsigned int mii_reg;
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mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXSTATUS);
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switch ((mii_reg & MIIM_BCM54xx_AUXSTATUS_LINKMODE_MASK) >>
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MIIM_BCM54xx_AUXSTATUS_LINKMODE_SHIFT) {
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case 1:
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phydev->duplex = DUPLEX_HALF;
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phydev->speed = SPEED_10;
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break;
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case 2:
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phydev->duplex = DUPLEX_FULL;
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phydev->speed = SPEED_10;
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break;
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case 3:
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phydev->duplex = DUPLEX_HALF;
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phydev->speed = SPEED_100;
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break;
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case 5:
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phydev->duplex = DUPLEX_FULL;
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phydev->speed = SPEED_100;
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break;
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case 6:
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phydev->duplex = DUPLEX_HALF;
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phydev->speed = SPEED_1000;
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break;
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case 7:
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phydev->duplex = DUPLEX_FULL;
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phydev->speed = SPEED_1000;
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break;
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default:
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printf("Auto-neg error, defaulting to 10BT/HD\n");
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phydev->duplex = DUPLEX_HALF;
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phydev->speed = SPEED_10;
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break;
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}
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return 0;
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}
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static int bcm54xx_startup(struct phy_device *phydev)
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{
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int ret;
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/* Read the Status (2x to make sure link is right) */
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ret = genphy_update_link(phydev);
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if (ret)
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return ret;
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return bcm54xx_parse_status(phydev);
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}
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/* Broadcom BCM5482S */
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/*
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* "Ethernet@Wirespeed" needs to be enabled to achieve link in certain
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* circumstances. eg a gigabit TSEC connected to a gigabit switch with
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* a 4-wire ethernet cable. Both ends advertise gigabit, but can't
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* link. "Ethernet@Wirespeed" reduces advertised speed until link
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* can be achieved.
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*/
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static u32 bcm5482_read_wirespeed(struct phy_device *phydev, u32 reg)
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{
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return (phy_read(phydev, MDIO_DEVAD_NONE, reg) & 0x8FFF) | 0x8010;
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}
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static int bcm5482_config(struct phy_device *phydev)
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{
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unsigned int reg;
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/* reset the PHY */
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reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
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reg |= BMCR_RESET;
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phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, reg);
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/* Setup read from auxilary control shadow register 7 */
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL,
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MIIM_BCM54xx_AUXCNTL_ENCODE(7));
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/* Read Misc Control register and or in Ethernet@Wirespeed */
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reg = bcm5482_read_wirespeed(phydev, MIIM_BCM54xx_AUXCNTL);
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, reg);
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/* Initial config/enable of secondary SerDes interface */
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
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MIIM_BCM54XX_SHD_WR_ENCODE(0x14, 0xf));
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/* Write intial value to secondary SerDes Contol */
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
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MIIM_BCM54XX_EXP_SEL_SSD | 0);
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA,
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BMCR_ANRESTART);
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/* Enable copper/fiber auto-detect */
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_SHD,
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MIIM_BCM54XX_SHD_WR_ENCODE(0x1e, 0x201));
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genphy_config_aneg(phydev);
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return 0;
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}
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static int bcm_cygnus_startup(struct phy_device *phydev)
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{
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int ret;
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/* Read the Status (2x to make sure link is right) */
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ret = genphy_update_link(phydev);
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if (ret)
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return ret;
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return genphy_parse_link(phydev);
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}
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static void bcm_cygnus_afe(struct phy_device *phydev)
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{
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/* ensures smdspclk is enabled */
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54xx_AUXCNTL, 0x0c30);
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/* AFE_VDAC_ICTRL_0 bit 7:4 Iq=1100 for 1g 10bt, normal modes */
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bcm_phy_write_misc(phydev, 0x39, 0x01, 0xA7C8);
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/* AFE_HPF_TRIM_OTHERS bit11=1, short cascode for all modes*/
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bcm_phy_write_misc(phydev, 0x3A, 0x00, 0x0803);
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/* AFE_TX_CONFIG_1 bit 7:4 Iq=1100 for test modes */
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bcm_phy_write_misc(phydev, 0x3A, 0x01, 0xA740);
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/* AFE TEMPSEN_OTHERS rcal_HT, rcal_LT 10000 */
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bcm_phy_write_misc(phydev, 0x3A, 0x03, 0x8400);
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/* AFE_FUTURE_RSV bit 2:0 rccal <2:0>=100 */
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bcm_phy_write_misc(phydev, 0x3B, 0x00, 0x0004);
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/* Adjust bias current trim to overcome digital offSet */
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phy_write(phydev, MDIO_DEVAD_NONE, 0x1E, 0x02);
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/* make rcal=100, since rdb default is 000 */
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phy_write(phydev, MDIO_DEVAD_NONE, 0x17, 0x00B1);
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phy_write(phydev, MDIO_DEVAD_NONE, 0x15, 0x0010);
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/* CORE_EXPB0, Reset R_CAL/RC_CAL Engine */
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phy_write(phydev, MDIO_DEVAD_NONE, 0x17, 0x00B0);
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phy_write(phydev, MDIO_DEVAD_NONE, 0x15, 0x0010);
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/* CORE_EXPB0, Disable Reset R_CAL/RC_CAL Engine */
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phy_write(phydev, MDIO_DEVAD_NONE, 0x17, 0x00B0);
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phy_write(phydev, MDIO_DEVAD_NONE, 0x15, 0x0000);
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}
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static int bcm_cygnus_config(struct phy_device *phydev)
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{
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genphy_config_aneg(phydev);
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phy_reset(phydev);
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/* AFE settings for PHY stability */
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bcm_cygnus_afe(phydev);
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/* Forcing aneg after applying the AFE settings */
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genphy_restart_aneg(phydev);
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return 0;
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}
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/*
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* Find out if PHY is in copper or serdes mode by looking at Expansion Reg
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* 0x42 - "Operating Mode Status Register"
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*/
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static int bcm5482_is_serdes(struct phy_device *phydev)
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{
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u16 val;
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int serdes = 0;
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
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MIIM_BCM54XX_EXP_SEL_ER | 0x42);
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val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);
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switch (val & 0x1f) {
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case 0x0d: /* RGMII-to-100Base-FX */
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case 0x0e: /* RGMII-to-SGMII */
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case 0x0f: /* RGMII-to-SerDes */
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case 0x12: /* SGMII-to-SerDes */
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case 0x13: /* SGMII-to-100Base-FX */
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case 0x16: /* SerDes-to-Serdes */
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serdes = 1;
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break;
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case 0x6: /* RGMII-to-Copper */
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case 0x14: /* SGMII-to-Copper */
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case 0x17: /* SerDes-to-Copper */
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break;
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default:
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printf("ERROR, invalid PHY mode (0x%x\n)", val);
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break;
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}
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return serdes;
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}
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/*
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* Determine SerDes link speed and duplex from Expansion reg 0x42 "Operating
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* Mode Status Register"
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*/
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static u32 bcm5482_parse_serdes_sr(struct phy_device *phydev)
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{
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u16 val;
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int i = 0;
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/* Wait 1s for link - Clause 37 autonegotiation happens very fast */
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while (1) {
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_SEL,
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MIIM_BCM54XX_EXP_SEL_ER | 0x42);
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val = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_BCM54XX_EXP_DATA);
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if (val & 0x8000)
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break;
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if (i++ > 1000) {
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phydev->link = 0;
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return 1;
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}
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udelay(1000); /* 1 ms */
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}
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phydev->link = 1;
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switch ((val >> 13) & 0x3) {
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case (0x00):
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phydev->speed = 10;
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break;
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case (0x01):
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phydev->speed = 100;
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break;
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case (0x02):
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phydev->speed = 1000;
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break;
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}
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phydev->duplex = (val & 0x1000) == 0x1000;
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return 0;
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}
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/*
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* Figure out if BCM5482 is in serdes or copper mode and determine link
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* configuration accordingly
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*/
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static int bcm5482_startup(struct phy_device *phydev)
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{
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int ret;
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if (bcm5482_is_serdes(phydev)) {
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bcm5482_parse_serdes_sr(phydev);
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phydev->port = PORT_FIBRE;
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return 0;
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}
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/* Wait for auto-negotiation to complete or fail */
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ret = genphy_update_link(phydev);
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if (ret)
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return ret;
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/* Parse BCM54xx copper aux status register */
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return bcm54xx_parse_status(phydev);
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}
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static struct phy_driver BCM5461S_driver = {
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.name = "Broadcom BCM5461S",
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.uid = 0x2060c0,
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.mask = 0xfffff0,
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.features = PHY_GBIT_FEATURES,
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.config = &bcm5461_config,
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.startup = &bcm54xx_startup,
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.shutdown = &genphy_shutdown,
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};
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static struct phy_driver BCM5464S_driver = {
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.name = "Broadcom BCM5464S",
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.uid = 0x2060b0,
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.mask = 0xfffff0,
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.features = PHY_GBIT_FEATURES,
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.config = &bcm5461_config,
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.startup = &bcm54xx_startup,
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.shutdown = &genphy_shutdown,
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};
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static struct phy_driver BCM5482S_driver = {
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.name = "Broadcom BCM5482S",
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.uid = 0x143bcb0,
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.mask = 0xffffff0,
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.features = PHY_GBIT_FEATURES,
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.config = &bcm5482_config,
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.startup = &bcm5482_startup,
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.shutdown = &genphy_shutdown,
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};
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static struct phy_driver BCM_CYGNUS_driver = {
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.name = "Broadcom CYGNUS GPHY",
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.uid = 0xae025200,
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.mask = 0xfffff0,
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.features = PHY_GBIT_FEATURES,
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.config = &bcm_cygnus_config,
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.startup = &bcm_cygnus_startup,
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.shutdown = &genphy_shutdown,
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};
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int phy_broadcom_init(void)
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{
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phy_register(&BCM5482S_driver);
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phy_register(&BCM5464S_driver);
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phy_register(&BCM5461S_driver);
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phy_register(&BCM_CYGNUS_driver);
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return 0;
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}
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