diff options
Diffstat (limited to 'drivers/net/dsa/microchip/ksz9477.c')
-rw-r--r-- | drivers/net/dsa/microchip/ksz9477.c | 287 |
1 files changed, 61 insertions, 226 deletions
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c index 425e20daf1e9..0ba658a72d8f 100644 --- a/drivers/net/dsa/microchip/ksz9477.c +++ b/drivers/net/dsa/microchip/ksz9477.c @@ -56,187 +56,6 @@ int ksz9477_change_mtu(struct ksz_device *dev, int port, int mtu) REG_SW_MTU_MASK, frame_size); } -/** - * ksz9477_handle_wake_reason - Handle wake reason on a specified port. - * @dev: The device structure. - * @port: The port number. - * - * This function reads the PME (Power Management Event) status register of a - * specified port to determine the wake reason. If there is no wake event, it - * returns early. Otherwise, it logs the wake reason which could be due to a - * "Magic Packet", "Link Up", or "Energy Detect" event. The PME status register - * is then cleared to acknowledge the handling of the wake event. - * - * Return: 0 on success, or an error code on failure. - */ -static int ksz9477_handle_wake_reason(struct ksz_device *dev, int port) -{ - u8 pme_status; - int ret; - - ret = ksz_pread8(dev, port, REG_PORT_PME_STATUS, &pme_status); - if (ret) - return ret; - - if (!pme_status) - return 0; - - dev_dbg(dev->dev, "Wake event on port %d due to:%s%s%s\n", port, - pme_status & PME_WOL_MAGICPKT ? " \"Magic Packet\"" : "", - pme_status & PME_WOL_LINKUP ? " \"Link Up\"" : "", - pme_status & PME_WOL_ENERGY ? " \"Energy detect\"" : ""); - - return ksz_pwrite8(dev, port, REG_PORT_PME_STATUS, pme_status); -} - -/** - * ksz9477_get_wol - Get Wake-on-LAN settings for a specified port. - * @dev: The device structure. - * @port: The port number. - * @wol: Pointer to ethtool Wake-on-LAN settings structure. - * - * This function checks the PME Pin Control Register to see if PME Pin Output - * Enable is set, indicating PME is enabled. If enabled, it sets the supported - * and active WoL flags. - */ -void ksz9477_get_wol(struct ksz_device *dev, int port, - struct ethtool_wolinfo *wol) -{ - u8 pme_ctrl; - int ret; - - if (!dev->wakeup_source) - return; - - wol->supported = WAKE_PHY; - - /* Check if the current MAC address on this port can be set - * as global for WAKE_MAGIC support. The result may vary - * dynamically based on other ports configurations. - */ - if (ksz_is_port_mac_global_usable(dev->ds, port)) - wol->supported |= WAKE_MAGIC; - - ret = ksz_pread8(dev, port, REG_PORT_PME_CTRL, &pme_ctrl); - if (ret) - return; - - if (pme_ctrl & PME_WOL_MAGICPKT) - wol->wolopts |= WAKE_MAGIC; - if (pme_ctrl & (PME_WOL_LINKUP | PME_WOL_ENERGY)) - wol->wolopts |= WAKE_PHY; -} - -/** - * ksz9477_set_wol - Set Wake-on-LAN settings for a specified port. - * @dev: The device structure. - * @port: The port number. - * @wol: Pointer to ethtool Wake-on-LAN settings structure. - * - * This function configures Wake-on-LAN (WoL) settings for a specified port. - * It validates the provided WoL options, checks if PME is enabled via the - * switch's PME Pin Control Register, clears any previous wake reasons, - * and sets the Magic Packet flag in the port's PME control register if - * specified. - * - * Return: 0 on success, or other error codes on failure. - */ -int ksz9477_set_wol(struct ksz_device *dev, int port, - struct ethtool_wolinfo *wol) -{ - u8 pme_ctrl = 0, pme_ctrl_old = 0; - bool magic_switched_off; - bool magic_switched_on; - int ret; - - if (wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC)) - return -EINVAL; - - if (!dev->wakeup_source) - return -EOPNOTSUPP; - - ret = ksz9477_handle_wake_reason(dev, port); - if (ret) - return ret; - - if (wol->wolopts & WAKE_MAGIC) - pme_ctrl |= PME_WOL_MAGICPKT; - if (wol->wolopts & WAKE_PHY) - pme_ctrl |= PME_WOL_LINKUP | PME_WOL_ENERGY; - - ret = ksz_pread8(dev, port, REG_PORT_PME_CTRL, &pme_ctrl_old); - if (ret) - return ret; - - if (pme_ctrl_old == pme_ctrl) - return 0; - - magic_switched_off = (pme_ctrl_old & PME_WOL_MAGICPKT) && - !(pme_ctrl & PME_WOL_MAGICPKT); - magic_switched_on = !(pme_ctrl_old & PME_WOL_MAGICPKT) && - (pme_ctrl & PME_WOL_MAGICPKT); - - /* To keep reference count of MAC address, we should do this - * operation only on change of WOL settings. - */ - if (magic_switched_on) { - ret = ksz_switch_macaddr_get(dev->ds, port, NULL); - if (ret) - return ret; - } else if (magic_switched_off) { - ksz_switch_macaddr_put(dev->ds); - } - - ret = ksz_pwrite8(dev, port, REG_PORT_PME_CTRL, pme_ctrl); - if (ret) { - if (magic_switched_on) - ksz_switch_macaddr_put(dev->ds); - return ret; - } - - return 0; -} - -/** - * ksz9477_wol_pre_shutdown - Prepares the switch device for shutdown while - * considering Wake-on-LAN (WoL) settings. - * @dev: The switch device structure. - * @wol_enabled: Pointer to a boolean which will be set to true if WoL is - * enabled on any port. - * - * This function prepares the switch device for a safe shutdown while taking - * into account the Wake-on-LAN (WoL) settings on the user ports. It updates - * the wol_enabled flag accordingly to reflect whether WoL is active on any - * port. - */ -void ksz9477_wol_pre_shutdown(struct ksz_device *dev, bool *wol_enabled) -{ - struct dsa_port *dp; - int ret; - - *wol_enabled = false; - - if (!dev->wakeup_source) - return; - - dsa_switch_for_each_user_port(dp, dev->ds) { - u8 pme_ctrl = 0; - - ret = ksz_pread8(dev, dp->index, REG_PORT_PME_CTRL, &pme_ctrl); - if (!ret && pme_ctrl) - *wol_enabled = true; - - /* make sure there are no pending wake events which would - * prevent the device from going to sleep/shutdown. - */ - ksz9477_handle_wake_reason(dev, dp->index); - } - - /* Now we are save to enable PME pin. */ - if (*wol_enabled) - ksz_write8(dev, REG_SW_PME_CTRL, PME_ENABLE); -} - static int ksz9477_wait_vlan_ctrl_ready(struct ksz_device *dev) { unsigned int val; @@ -427,54 +246,70 @@ void ksz9477_freeze_mib(struct ksz_device *dev, int port, bool freeze) mutex_unlock(&p->mib.cnt_mutex); } -int ksz9477_errata_monitor(struct ksz_device *dev, int port, - u64 tx_late_col) +static int ksz9477_half_duplex_monitor(struct ksz_device *dev, int port, + u64 tx_late_col) { + u8 lue_ctrl; u32 pmavbc; - u8 status; u16 pqm; int ret; - ret = ksz_pread8(dev, port, REG_PORT_STATUS_0, &status); + /* Errata DS80000754 recommends monitoring potential faults in + * half-duplex mode. The switch might not be able to communicate anymore + * in these states. If you see this message, please read the + * errata-sheet for more information: + * https://ww1.microchip.com/downloads/aemDocuments/documents/UNG/ProductDocuments/Errata/KSZ9477S-Errata-DS80000754.pdf + * To workaround this issue, half-duplex mode should be avoided. + * A software reset could be implemented to recover from this state. + */ + dev_warn_once(dev->dev, + "Half-duplex detected on port %d, transmission halt may occur\n", + port); + if (tx_late_col != 0) { + /* Transmission halt with late collisions */ + dev_crit_once(dev->dev, + "TX late collisions detected, transmission may be halted on port %d\n", + port); + } + ret = ksz_read8(dev, REG_SW_LUE_CTRL_0, &lue_ctrl); if (ret) return ret; - if (!(FIELD_GET(PORT_INTF_SPEED_MASK, status) == PORT_INTF_SPEED_NONE) && - !(status & PORT_INTF_FULL_DUPLEX)) { - /* Errata DS80000754 recommends monitoring potential faults in - * half-duplex mode. The switch might not be able to communicate anymore - * in these states. - * If you see this message, please read the errata-sheet for more information: - * https://ww1.microchip.com/downloads/aemDocuments/documents/UNG/ProductDocuments/Errata/KSZ9477S-Errata-DS80000754.pdf - * To workaround this issue, half-duplex mode should be avoided. - * A software reset could be implemented to recover from this state. - */ - dev_warn_once(dev->dev, - "Half-duplex detected on port %d, transmission halt may occur\n", - port); - if (tx_late_col != 0) { - /* Transmission halt with late collisions */ - dev_crit_once(dev->dev, - "TX late collisions detected, transmission may be halted on port %d\n", - port); - } - ret = ksz_read8(dev, REG_SW_LUE_CTRL_0, &status); + if (lue_ctrl & SW_VLAN_ENABLE) { + ret = ksz_pread16(dev, port, REG_PORT_QM_TX_CNT_0__4, &pqm); if (ret) return ret; - if (status & SW_VLAN_ENABLE) { - ret = ksz_pread16(dev, port, REG_PORT_QM_TX_CNT_0__4, &pqm); - if (ret) - return ret; - ret = ksz_read32(dev, REG_PMAVBC, &pmavbc); - if (ret) - return ret; - if ((FIELD_GET(PMAVBC_MASK, pmavbc) <= PMAVBC_MIN) || - (FIELD_GET(PORT_QM_TX_CNT_M, pqm) >= PORT_QM_TX_CNT_MAX)) { - /* Transmission halt with Half-Duplex and VLAN */ - dev_crit_once(dev->dev, - "resources out of limits, transmission may be halted\n"); - } + + ret = ksz_read32(dev, REG_PMAVBC, &pmavbc); + if (ret) + return ret; + + if ((FIELD_GET(PMAVBC_MASK, pmavbc) <= PMAVBC_MIN) || + (FIELD_GET(PORT_QM_TX_CNT_M, pqm) >= PORT_QM_TX_CNT_MAX)) { + /* Transmission halt with Half-Duplex and VLAN */ + dev_crit_once(dev->dev, + "resources out of limits, transmission may be halted\n"); } } + + return ret; +} + +int ksz9477_errata_monitor(struct ksz_device *dev, int port, + u64 tx_late_col) +{ + u8 status; + int ret; + + ret = ksz_pread8(dev, port, REG_PORT_STATUS_0, &status); + if (ret) + return ret; + + if (!(FIELD_GET(PORT_INTF_SPEED_MASK, status) + == PORT_INTF_SPEED_NONE) && + !(status & PORT_INTF_FULL_DUPLEX)) { + ret = ksz9477_half_duplex_monitor(dev, port, tx_late_col); + } + return ret; } @@ -1188,6 +1023,7 @@ void ksz9477_port_queue_split(struct ksz_device *dev, int port) void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port) { + const u16 *regs = dev->info->regs; struct dsa_switch *ds = dev->ds; u16 data16; u8 member; @@ -1232,12 +1068,12 @@ void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port) ksz9477_port_acl_init(dev, port); /* clear pending wake flags */ - ksz9477_handle_wake_reason(dev, port); + ksz_handle_wake_reason(dev, port); /* Disable all WoL options by default. Otherwise * ksz_switch_macaddr_get/put logic will not work properly. */ - ksz_pwrite8(dev, port, REG_PORT_PME_CTRL, 0); + ksz_pwrite8(dev, port, regs[REG_PORT_PME_CTRL], 0); } void ksz9477_config_cpu_port(struct dsa_switch *ds) @@ -1334,6 +1170,7 @@ int ksz9477_enable_stp_addr(struct ksz_device *dev) int ksz9477_setup(struct dsa_switch *ds) { struct ksz_device *dev = ds->priv; + const u16 *regs = dev->info->regs; int ret = 0; ds->mtu_enforcement_ingress = true; @@ -1364,13 +1201,11 @@ int ksz9477_setup(struct dsa_switch *ds) /* enable global MIB counter freeze function */ ksz_cfg(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FREEZE, true); - /* Make sure PME (WoL) is not enabled. If requested, it will be - * enabled by ksz9477_wol_pre_shutdown(). Otherwise, some PMICs do not - * like PME events changes before shutdown. + /* Make sure PME (WoL) is not enabled. If requested, it will + * be enabled by ksz_wol_pre_shutdown(). Otherwise, some PMICs + * do not like PME events changes before shutdown. */ - ksz_write8(dev, REG_SW_PME_CTRL, 0); - - return 0; + return ksz_write8(dev, regs[REG_SW_PME_CTRL], 0); } u32 ksz9477_get_port_addr(int port, int offset) |