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Miller" , MD Danish Anwar CC: , , , , , , Subject: [PATCH 4/4] net: ti: icssg-prueth: am65x SR2.0 add 10M full duplex support Date: Thu, 3 Aug 2023 16:31:53 +0530 Message-ID: <20230803110153.3309577-5-danishanwar@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230803110153.3309577-1-danishanwar@ti.com> References: <20230803110153.3309577-1-danishanwar@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230803_040245_421087_F01372A1 X-CRM114-Status: GOOD ( 17.34 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Grygorii Strashko For AM65x SR2.0 it's required to enable IEP1 in raw 64bit mode which is used by PRU FW to monitor the link and apply w/a for 10M link issue. Note. No public errata available yet. Without this w/a the PRU FW will stuck if link state changes under TX traffic pressure. Hence, add support for 10M full duplex for AM65x SR2.0: - add new IEP API to enable IEP, but without PTP support - add pdata quirk_10m_link_issue to enable 10M link issue w/a. Signed-off-by: Grygorii Strashko Signed-off-by: Vignesh Raghavendra Signed-off-by: MD Danish Anwar --- drivers/net/ethernet/ti/icssg/icss_iep.c | 26 ++++++++++++++++++++ drivers/net/ethernet/ti/icssg/icss_iep.h | 2 ++ drivers/net/ethernet/ti/icssg/icssg_config.c | 6 +++++ drivers/net/ethernet/ti/icssg/icssg_prueth.c | 17 +++++++++++-- 4 files changed, 49 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/ti/icssg/icss_iep.c b/drivers/net/ethernet/ti/icssg/icss_iep.c index ee333cf14776..dfb836aef2e5 100644 --- a/drivers/net/ethernet/ti/icssg/icss_iep.c +++ b/drivers/net/ethernet/ti/icssg/icss_iep.c @@ -721,6 +721,32 @@ void icss_iep_put(struct icss_iep *iep) } EXPORT_SYMBOL_GPL(icss_iep_put); +void icss_iep_init_fw(struct icss_iep *iep) +{ + /* start IEP for FW use in raw 64bit mode, no PTP support */ + iep->clk_tick_time = iep->def_inc; + iep->cycle_time_ns = 0; + iep->ops = NULL; + iep->clockops_data = NULL; + icss_iep_set_default_inc(iep, iep->def_inc); + icss_iep_set_compensation_inc(iep, iep->def_inc); + icss_iep_set_compensation_count(iep, 0); + regmap_write(iep->map, ICSS_IEP_SYNC_PWIDTH_REG, iep->refclk_freq / 10); /* 100 ms pulse */ + regmap_write(iep->map, ICSS_IEP_SYNC0_PERIOD_REG, 0); + if (iep->plat_data->flags & ICSS_IEP_SLOW_COMPEN_REG_SUPPORT) + icss_iep_set_slow_compensation_count(iep, 0); + + icss_iep_enable(iep); + icss_iep_settime(iep, 0); +} +EXPORT_SYMBOL_GPL(icss_iep_init_fw); + +void icss_iep_exit_fw(struct icss_iep *iep) +{ + icss_iep_disable(iep); +} +EXPORT_SYMBOL_GPL(icss_iep_exit_fw); + int icss_iep_init(struct icss_iep *iep, const struct icss_iep_clockops *clkops, void *clockops_data, u32 cycle_time_ns) { diff --git a/drivers/net/ethernet/ti/icssg/icss_iep.h b/drivers/net/ethernet/ti/icssg/icss_iep.h index 9c7f4d0a0916..803a4b714893 100644 --- a/drivers/net/ethernet/ti/icssg/icss_iep.h +++ b/drivers/net/ethernet/ti/icssg/icss_iep.h @@ -35,5 +35,7 @@ int icss_iep_exit(struct icss_iep *iep); int icss_iep_get_count_low(struct icss_iep *iep); int icss_iep_get_count_hi(struct icss_iep *iep); int icss_iep_get_ptp_clock_idx(struct icss_iep *iep); +void icss_iep_init_fw(struct icss_iep *iep); +void icss_iep_exit_fw(struct icss_iep *iep); #endif /* __NET_TI_ICSS_IEP_H */ diff --git a/drivers/net/ethernet/ti/icssg/icssg_config.c b/drivers/net/ethernet/ti/icssg/icssg_config.c index ab648d3efe85..4c2b5d496670 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_config.c +++ b/drivers/net/ethernet/ti/icssg/icssg_config.c @@ -210,6 +210,9 @@ void icssg_config_ipg(struct prueth_emac *emac) case SPEED_100: icssg_mii_update_ipg(prueth->mii_rt, slice, MII_RT_TX_IPG_100M); break; + case SPEED_10: + icssg_mii_update_ipg(prueth->mii_rt, slice, MII_RT_TX_IPG_100M); + break; default: /* Other links speeds not supported */ netdev_err(emac->ndev, "Unsupported link speed\n"); @@ -440,6 +443,9 @@ void icssg_config_set_speed(struct prueth_emac *emac) case SPEED_100: fw_speed = FW_LINK_SPEED_100M; break; + case SPEED_10: + fw_speed = FW_LINK_SPEED_10M; + break; default: /* Other links speeds not supported */ netdev_err(emac->ndev, "Unsupported link speed\n"); diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c index 28a6deb8d4aa..40cb86872470 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c @@ -1131,7 +1131,6 @@ static int emac_phy_connect(struct prueth_emac *emac) /* remove unsupported modes */ phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT); - phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT); phy_remove_link_mode(ndev->phydev, ETHTOOL_LINK_MODE_Pause_BIT); @@ -2081,13 +2080,20 @@ static int prueth_probe(struct platform_device *pdev) goto free_pool; } + if (prueth->pdata.quirk_10m_link_issue) { + /* Enable IEP1 for FW in 64bit mode as W/A for 10M FD link detect issue under TX + * traffic. + */ + icss_iep_init_fw(prueth->iep1); + } + /* setup netdev interfaces */ if (eth0_node) { ret = prueth_netdev_init(prueth, eth0_node); if (ret) { dev_err_probe(dev, ret, "netdev init %s failed\n", eth0_node->name); - goto netdev_exit; + goto exit_iep; } prueth->emac[PRUETH_MAC0]->iep = prueth->iep0; } @@ -2158,6 +2164,10 @@ static int prueth_probe(struct platform_device *pdev) prueth_netdev_exit(prueth, eth_node); } +exit_iep: + if (prueth->pdata.quirk_10m_link_issue) + icss_iep_exit_fw(prueth->iep1); + free_pool: gen_pool_free(prueth->sram_pool, (unsigned long)prueth->msmcram.va, msmc_ram_size); @@ -2203,6 +2213,9 @@ static void prueth_remove(struct platform_device *pdev) prueth_netdev_exit(prueth, eth_node); } + if (prueth->pdata.quirk_10m_link_issue) + icss_iep_exit_fw(prueth->iep1); + icss_iep_put(prueth->iep1); icss_iep_put(prueth->iep0);