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net: phy: broadcom: Add support code for downshift/Wirespeed

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Broadcom's Wirespeed feature allows us to configure how auto-negotiation
should behave with fewer working pairs of wires on a cable. Add support
code for retrieving and setting such downshift counters using the
recently added ethtool downshift tunables.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2016-11-22 11:40:55 -08:00 • committed by David S. Miller
parent 5519da874a
commit d06f78c423
3 changed files with 101 additions and 0 deletions
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10
include/linux/brcmphy.h
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@ -114,6 +114,7 @@
#define MII_BCM54XX_AUXCTL_SHDWSEL_MISC 0x0007
#define MII_BCM54XX_AUXCTL_SHDWSEL_READ_SHIFT 12
#define MII_BCM54XX_AUXCTL_SHDWSEL_MISC_RGMII_SKEW_EN (1 << 8)
#define MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN (1 << 4)
#define MII_BCM54XX_AUXCTL_SHDWSEL_MASK 0x0007
@ -130,6 +131,7 @@
#define BCM_LED_SRC_INTR 0x6
#define BCM_LED_SRC_QUALITY 0x7
#define BCM_LED_SRC_RCVLED 0x8
#define BCM_LED_SRC_WIRESPEED 0x9
#define BCM_LED_SRC_MULTICOLOR1 0xa
#define BCM_LED_SRC_OPENSHORT 0xb
#define BCM_LED_SRC_OFF 0xe /* Tied high */
@ -141,6 +143,14 @@
* Shadow values go into bits [14:10] of register 0x1c to select a shadow
* register to access.
*/
/* 00100: Reserved control register 2 */
#define BCM54XX_SHD_SCR2 0x04
#define BCM54XX_SHD_SCR2_WSPD_RTRY_DIS 0x100
#define BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT 2
#define BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET 2
#define BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK 0x7
/* 00101: Spare Control Register 3 */
#define BCM54XX_SHD_SCR3 0x05
#define BCM54XX_SHD_SCR3_DEF_CLK125 0x0001