From 1bf40ada62901e14395902d0934a4e51e04afe46 Mon Sep 17 00:00:00 2001 From: "Lendacky, Thomas" Date: Thu, 3 Nov 2016 13:18:47 -0500 Subject: [PATCH] amd-xgbe: Add support for clause 37 auto-negotiation Add support to be able to use clause 37 auto-negotiation. Signed-off-by: Tom Lendacky Signed-off-by: David S. Miller --- drivers/net/ethernet/amd/xgbe/xgbe-common.h | 41 +++++ drivers/net/ethernet/amd/xgbe/xgbe-mdio.c | 242 +++++++++++++++++++++++++++- drivers/net/ethernet/amd/xgbe/xgbe.h | 11 +- 3 files changed, 286 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-common.h b/drivers/net/ethernet/amd/xgbe/xgbe-common.h index 695e982..8bcf4ef0 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-common.h +++ b/drivers/net/ethernet/amd/xgbe/xgbe-common.h @@ -1027,6 +1027,10 @@ #define MDIO_PMA_10GBR_FECCTRL 0x00ab #endif +#ifndef MDIO_PCS_DIG_CTRL +#define MDIO_PCS_DIG_CTRL 0x8000 +#endif + #ifndef MDIO_AN_XNP #define MDIO_AN_XNP 0x0016 #endif @@ -1047,10 +1051,34 @@ #define MDIO_AN_INT 0x8002 #endif +#ifndef MDIO_VEND2_AN_ADVERTISE +#define MDIO_VEND2_AN_ADVERTISE 0x0004 +#endif + +#ifndef MDIO_VEND2_AN_LP_ABILITY +#define MDIO_VEND2_AN_LP_ABILITY 0x0005 +#endif + +#ifndef MDIO_VEND2_AN_CTRL +#define MDIO_VEND2_AN_CTRL 0x8001 +#endif + +#ifndef MDIO_VEND2_AN_STAT +#define MDIO_VEND2_AN_STAT 0x8002 +#endif + #ifndef MDIO_CTRL1_SPEED1G #define MDIO_CTRL1_SPEED1G (MDIO_CTRL1_SPEED10G & ~BMCR_SPEED100) #endif +#ifndef MDIO_VEND2_CTRL1_AN_ENABLE +#define MDIO_VEND2_CTRL1_AN_ENABLE BIT(12) +#endif + +#ifndef MDIO_VEND2_CTRL1_AN_RESTART +#define MDIO_VEND2_CTRL1_AN_RESTART BIT(9) +#endif + /* MDIO mask values */ #define XGBE_AN_CL73_INT_CMPLT BIT(0) #define XGBE_AN_CL73_INC_LINK BIT(1) @@ -1065,6 +1093,19 @@ #define XGBE_KR_TRAINING_START BIT(0) #define XGBE_KR_TRAINING_ENABLE BIT(1) +#define XGBE_PCS_CL37_BP BIT(12) + +#define XGBE_AN_CL37_INT_CMPLT BIT(0) +#define XGBE_AN_CL37_INT_MASK 0x01 + +#define XGBE_AN_CL37_HD_MASK 0x40 +#define XGBE_AN_CL37_FD_MASK 0x20 + +#define XGBE_AN_CL37_PCS_MODE_MASK 0x06 +#define XGBE_AN_CL37_PCS_MODE_BASEX 0x00 +#define XGBE_AN_CL37_PCS_MODE_SGMII 0x04 +#define XGBE_AN_CL37_TX_CONFIG_MASK 0x08 + /* Bit setting and getting macros * The get macro will extract the current bit field value from within * the variable diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c index d5bfbe4..723eb90 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-mdio.c @@ -125,6 +125,41 @@ #include "xgbe.h" #include "xgbe-common.h" +static void xgbe_an37_clear_interrupts(struct xgbe_prv_data *pdata) +{ + int reg; + + reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_STAT); + reg &= ~XGBE_AN_CL37_INT_MASK; + XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_STAT, reg); +} + +static void xgbe_an37_disable_interrupts(struct xgbe_prv_data *pdata) +{ + int reg; + + reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL); + reg &= ~XGBE_AN_CL37_INT_MASK; + XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL, reg); + + reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_PCS_DIG_CTRL); + reg &= ~XGBE_PCS_CL37_BP; + XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_PCS_DIG_CTRL, reg); +} + +static void xgbe_an37_enable_interrupts(struct xgbe_prv_data *pdata) +{ + int reg; + + reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_PCS_DIG_CTRL); + reg |= XGBE_PCS_CL37_BP; + XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_PCS_DIG_CTRL, reg); + + reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL); + reg |= XGBE_AN_CL37_INT_MASK; + XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL, reg); +} + static void xgbe_an73_clear_interrupts(struct xgbe_prv_data *pdata) { XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0); @@ -146,11 +181,21 @@ static void xgbe_an_enable_interrupts(struct xgbe_prv_data *pdata) case XGBE_AN_MODE_CL73: xgbe_an73_enable_interrupts(pdata); break; + case XGBE_AN_MODE_CL37: + case XGBE_AN_MODE_CL37_SGMII: + xgbe_an37_enable_interrupts(pdata); + break; default: break; } } +static void xgbe_an_clear_interrupts_all(struct xgbe_prv_data *pdata) +{ + xgbe_an73_clear_interrupts(pdata); + xgbe_an37_clear_interrupts(pdata); +} + static void xgbe_an73_enable_kr_training(struct xgbe_prv_data *pdata) { unsigned int reg; @@ -258,6 +303,39 @@ static bool xgbe_use_mode(struct xgbe_prv_data *pdata, return pdata->phy_if.phy_impl.use_mode(pdata, mode); } +static void xgbe_an37_set(struct xgbe_prv_data *pdata, bool enable, + bool restart) +{ + unsigned int reg; + + reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_CTRL1); + reg &= ~MDIO_VEND2_CTRL1_AN_ENABLE; + + if (enable) + reg |= MDIO_VEND2_CTRL1_AN_ENABLE; + + if (restart) + reg |= MDIO_VEND2_CTRL1_AN_RESTART; + + XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_CTRL1, reg); +} + +static void xgbe_an37_restart(struct xgbe_prv_data *pdata) +{ + xgbe_an37_enable_interrupts(pdata); + xgbe_an37_set(pdata, true, true); + + netif_dbg(pdata, link, pdata->netdev, "CL37 AN enabled/restarted\n"); +} + +static void xgbe_an37_disable(struct xgbe_prv_data *pdata) +{ + xgbe_an37_set(pdata, false, false); + xgbe_an37_disable_interrupts(pdata); + + netif_dbg(pdata, link, pdata->netdev, "CL37 AN disabled\n"); +} + static void xgbe_an73_set(struct xgbe_prv_data *pdata, bool enable, bool restart) { @@ -297,6 +375,10 @@ static void xgbe_an_restart(struct xgbe_prv_data *pdata) case XGBE_AN_MODE_CL73: xgbe_an73_restart(pdata); break; + case XGBE_AN_MODE_CL37: + case XGBE_AN_MODE_CL37_SGMII: + xgbe_an37_restart(pdata); + break; default: break; } @@ -308,11 +390,21 @@ static void xgbe_an_disable(struct xgbe_prv_data *pdata) case XGBE_AN_MODE_CL73: xgbe_an73_disable(pdata); break; + case XGBE_AN_MODE_CL37: + case XGBE_AN_MODE_CL37_SGMII: + xgbe_an37_disable(pdata); + break; default: break; } } +static void xgbe_an_disable_all(struct xgbe_prv_data *pdata) +{ + xgbe_an73_disable(pdata); + xgbe_an37_disable(pdata); +} + static enum xgbe_an xgbe_an73_tx_training(struct xgbe_prv_data *pdata, enum xgbe_rx *state) { @@ -484,6 +576,30 @@ static enum xgbe_an xgbe_an73_incompat_link(struct xgbe_prv_data *pdata) return XGBE_AN_INCOMPAT_LINK; } +static void xgbe_an37_isr(struct xgbe_prv_data *pdata) +{ + unsigned int reg; + + /* Disable AN interrupts */ + xgbe_an37_disable_interrupts(pdata); + + /* Save the interrupt(s) that fired */ + reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_STAT); + pdata->an_int = reg & XGBE_AN_CL37_INT_MASK; + pdata->an_status = reg & ~XGBE_AN_CL37_INT_MASK; + + if (pdata->an_int) { + /* Clear the interrupt(s) that fired and process them */ + reg &= ~XGBE_AN_CL37_INT_MASK; + XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_STAT, reg); + + queue_work(pdata->an_workqueue, &pdata->an_irq_work); + } else { + /* Enable AN interrupts */ + xgbe_an37_enable_interrupts(pdata); + } +} + static void xgbe_an73_isr(struct xgbe_prv_data *pdata) { /* Disable AN interrupts */ @@ -513,6 +629,10 @@ static irqreturn_t xgbe_an_isr(int irq, void *data) case XGBE_AN_MODE_CL73: xgbe_an73_isr(pdata); break; + case XGBE_AN_MODE_CL37: + case XGBE_AN_MODE_CL37_SGMII: + xgbe_an37_isr(pdata); + break; default: break; } @@ -553,6 +673,64 @@ static const char *xgbe_state_as_string(enum xgbe_an state) } } +static void xgbe_an37_state_machine(struct xgbe_prv_data *pdata) +{ + enum xgbe_an cur_state = pdata->an_state; + + if (!pdata->an_int) + return; + + if (pdata->an_int & XGBE_AN_CL37_INT_CMPLT) { + pdata->an_state = XGBE_AN_COMPLETE; + pdata->an_int &= ~XGBE_AN_CL37_INT_CMPLT; + + /* If SGMII is enabled, check the link status */ + if ((pdata->an_mode == XGBE_AN_MODE_CL37_SGMII) && + !(pdata->an_status & XGBE_SGMII_AN_LINK_STATUS)) + pdata->an_state = XGBE_AN_NO_LINK; + } + + netif_dbg(pdata, link, pdata->netdev, "CL37 AN %s\n", + xgbe_state_as_string(pdata->an_state)); + + cur_state = pdata->an_state; + + switch (pdata->an_state) { + case XGBE_AN_READY: + break; + + case XGBE_AN_COMPLETE: + netif_dbg(pdata, link, pdata->netdev, + "Auto negotiation successful\n"); + break; + + case XGBE_AN_NO_LINK: + break; + + default: + pdata->an_state = XGBE_AN_ERROR; + } + + if (pdata->an_state == XGBE_AN_ERROR) { + netdev_err(pdata->netdev, + "error during auto-negotiation, state=%u\n", + cur_state); + + pdata->an_int = 0; + xgbe_an37_clear_interrupts(pdata); + } + + if (pdata->an_state >= XGBE_AN_COMPLETE) { + pdata->an_result = pdata->an_state; + pdata->an_state = XGBE_AN_READY; + + netif_dbg(pdata, link, pdata->netdev, "CL37 AN result: %s\n", + xgbe_state_as_string(pdata->an_result)); + } + + xgbe_an37_enable_interrupts(pdata); +} + static void xgbe_an73_state_machine(struct xgbe_prv_data *pdata) { enum xgbe_an cur_state = pdata->an_state; @@ -574,8 +752,6 @@ next_int: pdata->an_state = XGBE_AN_ERROR; } - pdata->an_result = pdata->an_state; - again: netif_dbg(pdata, link, pdata->netdev, "CL73 AN %s\n", xgbe_state_as_string(pdata->an_state)); @@ -656,6 +832,10 @@ static void xgbe_an_state_machine(struct work_struct *work) case XGBE_AN_MODE_CL73: xgbe_an73_state_machine(pdata); break; + case XGBE_AN_MODE_CL37: + case XGBE_AN_MODE_CL37_SGMII: + xgbe_an37_state_machine(pdata); + break; default: break; } @@ -663,6 +843,50 @@ static void xgbe_an_state_machine(struct work_struct *work) mutex_unlock(&pdata->an_mutex); } +static void xgbe_an37_init(struct xgbe_prv_data *pdata) +{ + unsigned int reg; + + /* Set up Advertisement register */ + reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_ADVERTISE); + if (pdata->phy.advertising & ADVERTISED_Pause) + reg |= 0x100; + else + reg &= ~0x100; + + if (pdata->phy.advertising & ADVERTISED_Asym_Pause) + reg |= 0x80; + else + reg &= ~0x80; + + /* Full duplex, but not half */ + reg |= XGBE_AN_CL37_FD_MASK; + reg &= ~XGBE_AN_CL37_HD_MASK; + + XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_ADVERTISE, reg); + + /* Set up the Control register */ + reg = XMDIO_READ(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL); + reg &= XGBE_AN_CL37_TX_CONFIG_MASK; + reg &= XGBE_AN_CL37_PCS_MODE_MASK; + + switch (pdata->an_mode) { + case XGBE_AN_MODE_CL37: + reg |= XGBE_AN_CL37_PCS_MODE_BASEX; + break; + case XGBE_AN_MODE_CL37_SGMII: + reg |= XGBE_AN_CL37_PCS_MODE_SGMII; + break; + default: + break; + } + + XMDIO_WRITE(pdata, MDIO_MMD_VEND2, MDIO_VEND2_AN_CTRL, reg); + + netif_dbg(pdata, link, pdata->netdev, "CL37 AN (%s) initialized\n", + (pdata->an_mode == XGBE_AN_MODE_CL37) ? "BaseX" : "SGMII"); +} + static void xgbe_an73_init(struct xgbe_prv_data *pdata) { unsigned int reg; @@ -719,6 +943,10 @@ static void xgbe_an_init(struct xgbe_prv_data *pdata) case XGBE_AN_MODE_CL73: xgbe_an73_init(pdata); break; + case XGBE_AN_MODE_CL37: + case XGBE_AN_MODE_CL37_SGMII: + xgbe_an37_init(pdata); + break; default: break; } @@ -865,10 +1093,10 @@ static int __xgbe_phy_config_aneg(struct xgbe_prv_data *pdata) } /* Disable and stop any in progress auto-negotiation */ - xgbe_an_disable(pdata); + xgbe_an_disable_all(pdata); /* Clear any auto-negotitation interrupts */ - xgbe_an73_clear_interrupts(pdata); + xgbe_an_clear_interrupts_all(pdata); pdata->an_result = XGBE_AN_READY; pdata->an_state = XGBE_AN_READY; @@ -1007,7 +1235,7 @@ static void xgbe_phy_stop(struct xgbe_prv_data *pdata) pdata->phy_started = 0; /* Disable auto-negotiation */ - xgbe_an_disable(pdata); + xgbe_an_disable_all(pdata); devm_free_irq(pdata->dev, pdata->an_irq, pdata); @@ -1078,10 +1306,10 @@ static int xgbe_phy_reset(struct xgbe_prv_data *pdata) return ret; /* Disable auto-negotiation for now */ - xgbe_an_disable(pdata); + xgbe_an_disable_all(pdata); /* Clear auto-negotiation interrupts */ - xgbe_an73_clear_interrupts(pdata); + xgbe_an_clear_interrupts_all(pdata); return 0; } diff --git a/drivers/net/ethernet/amd/xgbe/xgbe.h b/drivers/net/ethernet/amd/xgbe/xgbe.h index d90ecbc..8cb4f20 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe.h +++ b/drivers/net/ethernet/amd/xgbe/xgbe.h @@ -261,7 +261,13 @@ /* Auto-negotiation */ #define XGBE_AN_MS_TIMEOUT 500 -#define XGBE_LINK_TIMEOUT 10 +#define XGBE_LINK_TIMEOUT 5 + +#define XGBE_SGMII_AN_LINK_STATUS BIT(1) +#define XGBE_SGMII_AN_LINK_SPEED (BIT(2) | BIT(3)) +#define XGBE_SGMII_AN_LINK_SPEED_100 0x04 +#define XGBE_SGMII_AN_LINK_SPEED_1000 0x08 +#define XGBE_SGMII_AN_LINK_DUPLEX BIT(4) struct xgbe_prv_data; @@ -467,6 +473,8 @@ enum xgbe_speed { enum xgbe_an_mode { XGBE_AN_MODE_CL73 = 0, + XGBE_AN_MODE_CL37, + XGBE_AN_MODE_CL37_SGMII, XGBE_AN_MODE_NONE, }; @@ -961,6 +969,7 @@ struct xgbe_prv_data { /* Auto-negotiation state machine support */ unsigned int an_int; + unsigned int an_status; struct mutex an_mutex; enum xgbe_an an_result; enum xgbe_an an_state; -- 2.7.4