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e96a0d9774
In preparation of removing the .ack_interrupt() callback, we must replace its occurrences (aka phy_clear_interrupt), from the 2 places where it is called from (phy_enable_interrupts and phy_disable_interrupts), with equivalent functionality. This means that clearing interrupts now becomes something that the PHY driver is responsible of doing, before enabling interrupts and after clearing them. Make this driver follow the new contract. Cc: Kavya Sree Kotagiri <kavyasree.kotagiri@microchip.com> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
522 lines
14 KiB
C
522 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for Vitesse PHYs
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*
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* Author: Kriston Carson
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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/* Vitesse Extended Page Magic Register(s) */
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#define MII_VSC82X4_EXT_PAGE_16E 0x10
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#define MII_VSC82X4_EXT_PAGE_17E 0x11
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#define MII_VSC82X4_EXT_PAGE_18E 0x12
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/* Vitesse Extended Control Register 1 */
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#define MII_VSC8244_EXT_CON1 0x17
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#define MII_VSC8244_EXTCON1_INIT 0x0000
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#define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00
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#define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300
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#define MII_VSC8244_EXTCON1_TX_SKEW 0x0800
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#define MII_VSC8244_EXTCON1_RX_SKEW 0x0200
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/* Vitesse Interrupt Mask Register */
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#define MII_VSC8244_IMASK 0x19
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#define MII_VSC8244_IMASK_IEN 0x8000
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#define MII_VSC8244_IMASK_SPEED 0x4000
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#define MII_VSC8244_IMASK_LINK 0x2000
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#define MII_VSC8244_IMASK_DUPLEX 0x1000
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#define MII_VSC8244_IMASK_MASK 0xf000
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#define MII_VSC8221_IMASK_MASK 0xa000
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/* Vitesse Interrupt Status Register */
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#define MII_VSC8244_ISTAT 0x1a
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#define MII_VSC8244_ISTAT_STATUS 0x8000
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#define MII_VSC8244_ISTAT_SPEED 0x4000
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#define MII_VSC8244_ISTAT_LINK 0x2000
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#define MII_VSC8244_ISTAT_DUPLEX 0x1000
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#define MII_VSC8244_ISTAT_MASK (MII_VSC8244_ISTAT_SPEED | \
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MII_VSC8244_ISTAT_LINK | \
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MII_VSC8244_ISTAT_DUPLEX)
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#define MII_VSC8221_ISTAT_MASK MII_VSC8244_ISTAT_LINK
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/* Vitesse Auxiliary Control/Status Register */
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#define MII_VSC8244_AUX_CONSTAT 0x1c
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#define MII_VSC8244_AUXCONSTAT_INIT 0x0000
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#define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020
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#define MII_VSC8244_AUXCONSTAT_SPEED 0x0018
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#define MII_VSC8244_AUXCONSTAT_GBIT 0x0010
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#define MII_VSC8244_AUXCONSTAT_100 0x0008
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#define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
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#define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
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/* Vitesse Extended Page Access Register */
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#define MII_VSC82X4_EXT_PAGE_ACCESS 0x1f
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/* Vitesse VSC8601 Extended PHY Control Register 1 */
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#define MII_VSC8601_EPHY_CTL 0x17
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#define MII_VSC8601_EPHY_CTL_RGMII_SKEW (1 << 8)
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#define PHY_ID_VSC8234 0x000fc620
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#define PHY_ID_VSC8244 0x000fc6c0
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#define PHY_ID_VSC8572 0x000704d0
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#define PHY_ID_VSC8601 0x00070420
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#define PHY_ID_VSC7385 0x00070450
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#define PHY_ID_VSC7388 0x00070480
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#define PHY_ID_VSC7395 0x00070550
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#define PHY_ID_VSC7398 0x00070580
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#define PHY_ID_VSC8662 0x00070660
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#define PHY_ID_VSC8221 0x000fc550
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#define PHY_ID_VSC8211 0x000fc4b0
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MODULE_DESCRIPTION("Vitesse PHY driver");
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MODULE_AUTHOR("Kriston Carson");
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MODULE_LICENSE("GPL");
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static int vsc824x_add_skew(struct phy_device *phydev)
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{
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int err;
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int extcon;
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extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
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if (extcon < 0)
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return extcon;
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extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
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MII_VSC8244_EXTCON1_RX_SKEW_MASK);
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extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
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MII_VSC8244_EXTCON1_RX_SKEW);
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err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
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return err;
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}
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static int vsc824x_config_init(struct phy_device *phydev)
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{
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int err;
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err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
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MII_VSC8244_AUXCONSTAT_INIT);
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if (err < 0)
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return err;
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if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
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err = vsc824x_add_skew(phydev);
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return err;
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}
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#define VSC73XX_EXT_PAGE_ACCESS 0x1f
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static int vsc73xx_read_page(struct phy_device *phydev)
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{
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return __phy_read(phydev, VSC73XX_EXT_PAGE_ACCESS);
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}
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static int vsc73xx_write_page(struct phy_device *phydev, int page)
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{
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return __phy_write(phydev, VSC73XX_EXT_PAGE_ACCESS, page);
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}
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static void vsc73xx_config_init(struct phy_device *phydev)
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{
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/* Receiver init */
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x0c, 0x0300, 0x0200);
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phy_write(phydev, 0x1f, 0x0000);
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/* Config LEDs 0x61 */
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phy_modify(phydev, MII_TPISTATUS, 0xff00, 0x0061);
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}
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static int vsc738x_config_init(struct phy_device *phydev)
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{
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u16 rev;
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/* This magic sequence appear in the application note
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* "VSC7385/7388 PHY Configuration".
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*
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* Maybe one day we will get to know what it all means.
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*/
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0200);
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phy_write(phydev, 0x1f, 0x52b5);
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phy_write(phydev, 0x10, 0xb68a);
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phy_modify(phydev, 0x12, 0xff07, 0x0003);
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phy_modify(phydev, 0x11, 0x00ff, 0x00a2);
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phy_write(phydev, 0x10, 0x968a);
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0000);
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phy_write(phydev, 0x1f, 0x0000);
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/* Read revision */
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rev = phy_read(phydev, MII_PHYSID2);
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rev &= 0x0f;
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/* Special quirk for revision 0 */
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if (rev == 0) {
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0200);
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phy_write(phydev, 0x1f, 0x52b5);
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phy_write(phydev, 0x12, 0x0000);
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phy_write(phydev, 0x11, 0x0689);
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phy_write(phydev, 0x10, 0x8f92);
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phy_write(phydev, 0x1f, 0x52b5);
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phy_write(phydev, 0x12, 0x0000);
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phy_write(phydev, 0x11, 0x0e35);
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phy_write(phydev, 0x10, 0x9786);
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0000);
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phy_write(phydev, 0x17, 0xff80);
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phy_write(phydev, 0x17, 0x0000);
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}
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phy_write(phydev, 0x1f, 0x0000);
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phy_write(phydev, 0x12, 0x0048);
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if (rev == 0) {
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phy_write(phydev, 0x1f, 0x2a30);
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phy_write(phydev, 0x14, 0x6600);
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phy_write(phydev, 0x1f, 0x0000);
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phy_write(phydev, 0x18, 0xa24e);
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} else {
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x16, 0x0fc0, 0x0240);
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phy_modify(phydev, 0x14, 0x6000, 0x4000);
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/* bits 14-15 in extended register 0x14 controls DACG amplitude
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* 6 = -8%, 2 is hardware default
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*/
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phy_write(phydev, 0x1f, 0x0001);
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phy_modify(phydev, 0x14, 0xe000, 0x6000);
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phy_write(phydev, 0x1f, 0x0000);
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}
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vsc73xx_config_init(phydev);
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return 0;
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}
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static int vsc739x_config_init(struct phy_device *phydev)
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{
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/* This magic sequence appears in the VSC7395 SparX-G5e application
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* note "VSC7395/VSC7398 PHY Configuration"
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*
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* Maybe one day we will get to know what it all means.
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*/
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0200);
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phy_write(phydev, 0x1f, 0x52b5);
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phy_write(phydev, 0x10, 0xb68a);
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phy_modify(phydev, 0x12, 0xff07, 0x0003);
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phy_modify(phydev, 0x11, 0x00ff, 0x00a2);
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phy_write(phydev, 0x10, 0x968a);
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x08, 0x0200, 0x0000);
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phy_write(phydev, 0x1f, 0x0000);
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phy_write(phydev, 0x1f, 0x0000);
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phy_write(phydev, 0x12, 0x0048);
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phy_write(phydev, 0x1f, 0x2a30);
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phy_modify(phydev, 0x16, 0x0fc0, 0x0240);
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phy_modify(phydev, 0x14, 0x6000, 0x4000);
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phy_write(phydev, 0x1f, 0x0001);
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phy_modify(phydev, 0x14, 0xe000, 0x6000);
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phy_write(phydev, 0x1f, 0x0000);
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vsc73xx_config_init(phydev);
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return 0;
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}
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static int vsc73xx_config_aneg(struct phy_device *phydev)
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{
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/* The VSC73xx switches does not like to be instructed to
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* do autonegotiation in any way, it prefers that you just go
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* with the power-on/reset defaults. Writing some registers will
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* just make autonegotiation permanently fail.
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*/
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return 0;
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}
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/* This adds a skew for both TX and RX clocks, so the skew should only be
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* applied to "rgmii-id" interfaces. It may not work as expected
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* on "rgmii-txid", "rgmii-rxid" or "rgmii" interfaces. */
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static int vsc8601_add_skew(struct phy_device *phydev)
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{
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int ret;
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ret = phy_read(phydev, MII_VSC8601_EPHY_CTL);
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if (ret < 0)
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return ret;
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ret |= MII_VSC8601_EPHY_CTL_RGMII_SKEW;
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return phy_write(phydev, MII_VSC8601_EPHY_CTL, ret);
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}
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static int vsc8601_config_init(struct phy_device *phydev)
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{
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int ret = 0;
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if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
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ret = vsc8601_add_skew(phydev);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int vsc82xx_config_intr(struct phy_device *phydev)
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{
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int err;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
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/* Don't bother to ACK the interrupts since the 824x cannot
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* clear the interrupts if they are disabled.
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*/
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err = phy_write(phydev, MII_VSC8244_IMASK,
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(phydev->drv->phy_id == PHY_ID_VSC8234 ||
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phydev->drv->phy_id == PHY_ID_VSC8244 ||
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phydev->drv->phy_id == PHY_ID_VSC8572 ||
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phydev->drv->phy_id == PHY_ID_VSC8601) ?
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MII_VSC8244_IMASK_MASK :
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MII_VSC8221_IMASK_MASK);
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else {
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/* The Vitesse PHY cannot clear the interrupt
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* once it has disabled them, so we clear them first
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*/
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err = phy_read(phydev, MII_VSC8244_ISTAT);
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if (err < 0)
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return err;
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err = phy_write(phydev, MII_VSC8244_IMASK, 0);
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}
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return err;
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}
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static irqreturn_t vsc82xx_handle_interrupt(struct phy_device *phydev)
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{
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int irq_status, irq_mask;
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if (phydev->drv->phy_id == PHY_ID_VSC8244 ||
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phydev->drv->phy_id == PHY_ID_VSC8572 ||
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phydev->drv->phy_id == PHY_ID_VSC8601)
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irq_mask = MII_VSC8244_ISTAT_MASK;
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else
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irq_mask = MII_VSC8221_ISTAT_MASK;
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irq_status = phy_read(phydev, MII_VSC8244_ISTAT);
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if (irq_status < 0) {
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phy_error(phydev);
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return IRQ_NONE;
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}
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if (!(irq_status & irq_mask))
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return IRQ_NONE;
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phy_trigger_machine(phydev);
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return IRQ_HANDLED;
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}
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static int vsc8221_config_init(struct phy_device *phydev)
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{
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int err;
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err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
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MII_VSC8221_AUXCONSTAT_INIT);
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return err;
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/* Perhaps we should set EXT_CON1 based on the interface?
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* Options are 802.3Z SerDes or SGMII
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*/
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}
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/* vsc82x4_config_autocross_enable - Enable auto MDI/MDI-X for forced links
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* @phydev: target phy_device struct
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*
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* Enable auto MDI/MDI-X when in 10/100 forced link speeds by writing
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* special values in the VSC8234/VSC8244 extended reserved registers
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*/
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static int vsc82x4_config_autocross_enable(struct phy_device *phydev)
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{
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int ret;
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if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed > SPEED_100)
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return 0;
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/* map extended registers set 0x10 - 0x1e */
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x52b5);
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if (ret >= 0)
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_18E, 0x0012);
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if (ret >= 0)
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_17E, 0x2803);
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if (ret >= 0)
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_16E, 0x87fa);
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/* map standard registers set 0x10 - 0x1e */
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if (ret >= 0)
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ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
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else
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phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
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return ret;
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}
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/* vsc82x4_config_aneg - restart auto-negotiation or write BMCR
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* @phydev: target phy_device struct
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*
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* Description: If auto-negotiation is enabled, we configure the
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* advertising, and then restart auto-negotiation. If it is not
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* enabled, then we write the BMCR and also start the auto
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* MDI/MDI-X feature
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*/
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static int vsc82x4_config_aneg(struct phy_device *phydev)
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{
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int ret;
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/* Enable auto MDI/MDI-X when in 10/100 forced link speeds by
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* writing special values in the VSC8234 extended reserved registers
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*/
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if (phydev->autoneg != AUTONEG_ENABLE && phydev->speed <= SPEED_100) {
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ret = genphy_setup_forced(phydev);
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if (ret < 0) /* error */
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return ret;
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return vsc82x4_config_autocross_enable(phydev);
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}
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return genphy_config_aneg(phydev);
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}
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/* Vitesse 82xx */
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static struct phy_driver vsc82xx_driver[] = {
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{
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.phy_id = PHY_ID_VSC8234,
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.name = "Vitesse VSC8234",
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.phy_id_mask = 0x000ffff0,
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/* PHY_GBIT_FEATURES */
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.config_init = &vsc824x_config_init,
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.config_aneg = &vsc82x4_config_aneg,
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.config_intr = &vsc82xx_config_intr,
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.handle_interrupt = &vsc82xx_handle_interrupt,
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}, {
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.phy_id = PHY_ID_VSC8244,
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.name = "Vitesse VSC8244",
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.phy_id_mask = 0x000fffc0,
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/* PHY_GBIT_FEATURES */
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.config_init = &vsc824x_config_init,
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.config_aneg = &vsc82x4_config_aneg,
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.config_intr = &vsc82xx_config_intr,
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.handle_interrupt = &vsc82xx_handle_interrupt,
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}, {
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.phy_id = PHY_ID_VSC8572,
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.name = "Vitesse VSC8572",
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.phy_id_mask = 0x000ffff0,
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/* PHY_GBIT_FEATURES */
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.config_init = &vsc824x_config_init,
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.config_aneg = &vsc82x4_config_aneg,
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.config_intr = &vsc82xx_config_intr,
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.handle_interrupt = &vsc82xx_handle_interrupt,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC8601,
|
|
.name = "Vitesse VSC8601",
|
|
.phy_id_mask = 0x000ffff0,
|
|
/* PHY_GBIT_FEATURES */
|
|
.config_init = &vsc8601_config_init,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
.handle_interrupt = &vsc82xx_handle_interrupt,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC7385,
|
|
.name = "Vitesse VSC7385",
|
|
.phy_id_mask = 0x000ffff0,
|
|
/* PHY_GBIT_FEATURES */
|
|
.config_init = vsc738x_config_init,
|
|
.config_aneg = vsc73xx_config_aneg,
|
|
.read_page = vsc73xx_read_page,
|
|
.write_page = vsc73xx_write_page,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC7388,
|
|
.name = "Vitesse VSC7388",
|
|
.phy_id_mask = 0x000ffff0,
|
|
/* PHY_GBIT_FEATURES */
|
|
.config_init = vsc738x_config_init,
|
|
.config_aneg = vsc73xx_config_aneg,
|
|
.read_page = vsc73xx_read_page,
|
|
.write_page = vsc73xx_write_page,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC7395,
|
|
.name = "Vitesse VSC7395",
|
|
.phy_id_mask = 0x000ffff0,
|
|
/* PHY_GBIT_FEATURES */
|
|
.config_init = vsc739x_config_init,
|
|
.config_aneg = vsc73xx_config_aneg,
|
|
.read_page = vsc73xx_read_page,
|
|
.write_page = vsc73xx_write_page,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC7398,
|
|
.name = "Vitesse VSC7398",
|
|
.phy_id_mask = 0x000ffff0,
|
|
/* PHY_GBIT_FEATURES */
|
|
.config_init = vsc739x_config_init,
|
|
.config_aneg = vsc73xx_config_aneg,
|
|
.read_page = vsc73xx_read_page,
|
|
.write_page = vsc73xx_write_page,
|
|
}, {
|
|
.phy_id = PHY_ID_VSC8662,
|
|
.name = "Vitesse VSC8662",
|
|
.phy_id_mask = 0x000ffff0,
|
|
/* PHY_GBIT_FEATURES */
|
|
.config_init = &vsc824x_config_init,
|
|
.config_aneg = &vsc82x4_config_aneg,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
.handle_interrupt = &vsc82xx_handle_interrupt,
|
|
}, {
|
|
/* Vitesse 8221 */
|
|
.phy_id = PHY_ID_VSC8221,
|
|
.phy_id_mask = 0x000ffff0,
|
|
.name = "Vitesse VSC8221",
|
|
/* PHY_GBIT_FEATURES */
|
|
.config_init = &vsc8221_config_init,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
.handle_interrupt = &vsc82xx_handle_interrupt,
|
|
}, {
|
|
/* Vitesse 8211 */
|
|
.phy_id = PHY_ID_VSC8211,
|
|
.phy_id_mask = 0x000ffff0,
|
|
.name = "Vitesse VSC8211",
|
|
/* PHY_GBIT_FEATURES */
|
|
.config_init = &vsc8221_config_init,
|
|
.config_intr = &vsc82xx_config_intr,
|
|
.handle_interrupt = &vsc82xx_handle_interrupt,
|
|
} };
|
|
|
|
module_phy_driver(vsc82xx_driver);
|
|
|
|
static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
|
|
{ PHY_ID_VSC8234, 0x000ffff0 },
|
|
{ PHY_ID_VSC8244, 0x000fffc0 },
|
|
{ PHY_ID_VSC8572, 0x000ffff0 },
|
|
{ PHY_ID_VSC7385, 0x000ffff0 },
|
|
{ PHY_ID_VSC7388, 0x000ffff0 },
|
|
{ PHY_ID_VSC7395, 0x000ffff0 },
|
|
{ PHY_ID_VSC7398, 0x000ffff0 },
|
|
{ PHY_ID_VSC8662, 0x000ffff0 },
|
|
{ PHY_ID_VSC8221, 0x000ffff0 },
|
|
{ PHY_ID_VSC8211, 0x000ffff0 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(mdio, vitesse_tbl);
|