Commit 48e8c6f1 authored by Peter Geis's avatar Peter Geis Committed by David S. Miller
Browse files

net: phy: add driver for Motorcomm yt8511 phy 



Add a driver for the Motorcomm yt8511 phy that will be used in the
production Pine64 rk3566-quartz64 development board.
It supports gigabit transfer speeds, rgmii, and 125mhz clk output.

Signed-off-by: default avatarPeter Geis <pgwipeout@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d0d62baa

MAINTAINERS

+6 −0
Original line number Diff line number Diff line
@@ -12378,6 +12378,12 @@ F: Documentation/userspace-api/media/drivers/meye* 
F:	drivers/media/pci/meye/

F:	include/uapi/linux/meye.h









MOTORCOMM PHY DRIVER









M:	Peter Geis <pgwipeout@gmail.com>









L:	netdev@vger.kernel.org









S:	Maintained









F:	drivers/net/phy/motorcomm.c

















MOXA SMARTIO/INDUSTIO/INTELLIO SERIAL CARD









S:	Orphan









F:	Documentation/driver-api/serial/moxa-smartio.rst
































drivers/net/phy/Kconfig



+6
−0






























Original line number
Diff line number
Diff line







@@ -234,6 +234,12 @@ config MICROSEMI_PHY







	help









	  Currently supports VSC8514, VSC8530, VSC8531, VSC8540 and VSC8541 PHYs



















config MOTORCOMM_PHY









	tristate "Motorcomm PHYs"









	help









	  Enables support for Motorcomm network PHYs.









	  Currently supports the YT8511 gigabit PHY.



















config NATIONAL_PHY









	tristate "National Semiconductor PHYs"









	help
































drivers/net/phy/Makefile



+1
−0






























Original line number
Diff line number
Diff line







@@ -71,6 +71,7 @@ obj-$(CONFIG_MICREL_PHY)	+= micrel.o







obj-$(CONFIG_MICROCHIP_PHY)	+= microchip.o









obj-$(CONFIG_MICROCHIP_T1_PHY)	+= microchip_t1.o









obj-$(CONFIG_MICROSEMI_PHY)	+= mscc/









obj-$(CONFIG_MOTORCOMM_PHY)	+= motorcomm.o









obj-$(CONFIG_NATIONAL_PHY)	+= national.o









obj-$(CONFIG_NXP_C45_TJA11XX_PHY)	+= nxp-c45-tja11xx.o









obj-$(CONFIG_NXP_TJA11XX_PHY)	+= nxp-tja11xx.o
































drivers/net/phy/motorcomm.c
0 → 100644



+136
−0






























Original line number
Diff line number
Diff line









// SPDX-License-Identifier: GPL-2.0+









/*









 * Driver for Motorcomm PHYs









 *









 * Author: Peter Geis <pgwipeout@gmail.com>









 */



















#include <linux/kernel.h>









#include <linux/module.h>









#include <linux/phy.h>



















#define PHY_ID_YT8511		0x0000010a



















#define YT8511_PAGE_SELECT	0x1e









#define YT8511_PAGE		0x1f









#define YT8511_EXT_CLK_GATE	0x0c









#define YT8511_EXT_DELAY_DRIVE	0x0d









#define YT8511_EXT_SLEEP_CTRL	0x27



















/* 2b00 25m from pll









 * 2b01 25m from xtl *default*









 * 2b10 62.m from pll









 * 2b11 125m from pll









 */









#define YT8511_CLK_125M		(BIT(2) | BIT(1))









#define YT8511_PLLON_SLP	BIT(14)



















/* RX Delay enabled = 1.8ns 1000T, 8ns 10/100T */









#define YT8511_DELAY_RX		BIT(0)



















/* TX Gig-E Delay is bits 7:4, default 0x5









 * TX Fast-E Delay is bits 15:12, default 0xf









 * Delay = 150ps * N - 250ps









 * On = 2000ps, off = 50ps









 */









#define YT8511_DELAY_GE_TX_EN	(0xf << 4)









#define YT8511_DELAY_GE_TX_DIS	(0x2 << 4)









#define YT8511_DELAY_FE_TX_EN	(0xf << 12)









#define YT8511_DELAY_FE_TX_DIS	(0x2 << 12)



















static int yt8511_read_page(struct phy_device *phydev)









{









	return __phy_read(phydev, YT8511_PAGE_SELECT);









};



















static int yt8511_write_page(struct phy_device *phydev, int page)









{









	return __phy_write(phydev, YT8511_PAGE_SELECT, page);









};



















static int yt8511_config_init(struct phy_device *phydev)









{









	unsigned int ge, fe;









	int ret, oldpage;



















	/* set clock mode to 125mhz */









	oldpage = phy_select_page(phydev, YT8511_EXT_CLK_GATE);









	if (oldpage < 0)









		goto err_restore_page;



















	ret = __phy_modify(phydev, YT8511_PAGE, 0, YT8511_CLK_125M);









	if (ret < 0)









		goto err_restore_page;



















	/* set rgmii delay mode */









	switch (phydev->interface) {









	case PHY_INTERFACE_MODE_RGMII:









		ge = YT8511_DELAY_GE_TX_DIS;









		fe = YT8511_DELAY_FE_TX_DIS;









		break;









	case PHY_INTERFACE_MODE_RGMII_RXID:









		ge = YT8511_DELAY_RX | YT8511_DELAY_GE_TX_DIS;









		fe = YT8511_DELAY_FE_TX_DIS;









		break;









	case PHY_INTERFACE_MODE_RGMII_TXID:









		ge = YT8511_DELAY_GE_TX_EN;









		fe = YT8511_DELAY_FE_TX_EN;









		break;









	case PHY_INTERFACE_MODE_RGMII_ID:









		ge = YT8511_DELAY_RX | YT8511_DELAY_GE_TX_EN;









		fe = YT8511_DELAY_FE_TX_EN;









		break;









	default: /* leave everything alone in other modes */









		break;









	}



















	ret = __phy_modify(phydev, YT8511_PAGE, (YT8511_DELAY_RX | YT8511_DELAY_GE_TX_EN), ge);









	if (ret < 0)









		goto err_restore_page;



















	/* fast ethernet delay is in a separate page */









	ret = __phy_write(phydev, YT8511_PAGE_SELECT, YT8511_EXT_DELAY_DRIVE);









	if (ret < 0)









		goto err_restore_page;



















	ret = __phy_modify(phydev, YT8511_PAGE, YT8511_DELAY_FE_TX_EN, fe);









	if (ret < 0)









		goto err_restore_page;



















	/* leave pll enabled in sleep */









	ret = __phy_write(phydev, YT8511_PAGE_SELECT, YT8511_EXT_SLEEP_CTRL);









	if (ret < 0)









		goto err_restore_page;



















	ret = __phy_modify(phydev, YT8511_PAGE, 0, YT8511_PLLON_SLP);









	if (ret < 0)









		goto err_restore_page;



















err_restore_page:









	return phy_restore_page(phydev, oldpage, ret);









}



















static struct phy_driver motorcomm_phy_drvs[] = {









	{









		PHY_ID_MATCH_EXACT(PHY_ID_YT8511),









		.name		= "YT8511 Gigabit Ethernet",









		.config_init	= yt8511_config_init,









		.suspend	= genphy_suspend,









		.resume		= genphy_resume,









		.read_page	= yt8511_read_page,









		.write_page	= yt8511_write_page,









	},









};



















module_phy_driver(motorcomm_phy_drvs);



















MODULE_DESCRIPTION("Motorcomm PHY driver");









MODULE_AUTHOR("Peter Geis");









MODULE_LICENSE("GPL");



















static const struct mdio_device_id __maybe_unused motorcomm_tbl[] = {









	{ PHY_ID_MATCH_EXACT(PHY_ID_YT8511) },









	{ /* sentinal */ }









};



















MODULE_DEVICE_TABLE(mdio, motorcomm_tbl);