From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7A14783A09; Mon, 8 Apr 2024 13:15:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712582133; cv=none; b=tze3YFXN3Fm+2ION+A/b9tXscSlIOQEoRBLGIxbbhNmEiUKXRo99aTwMpOhe7d7/tTQrAi6mvk+6PGVmcXu/Bm0/u4IcOgqlTnpRGsuedPzo21wgeWJjmxFWwP977nrz/zFJYky/7TmQe4DnHYeqBN77NNVpYdnAtpsRpO9ebbA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712582133; c=relaxed/simple; bh=cIM3VulVvvane761z2vqbQPfLeYkSs3HWjSG7iWBLns=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CLWN2At1WAu8U3wxrP3bYH05zmMThHwLA4+cwOjEPAn2YZpyT7vkNMs3RQdw3BAXLx2rm68TbZJ+o7K/alvrMBzIdecy0kkvIk1gXqUzp6GXtly1ve3Co6gP+WR9FRB6rXyXI30iBGgVkCkEWg92XfGrKfma36hf2aRtY09Bvjo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=s/C1L+vG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="s/C1L+vG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F36ECC433C7; Mon, 8 Apr 2024 13:15:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1712582133; bh=cIM3VulVvvane761z2vqbQPfLeYkSs3HWjSG7iWBLns=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s/C1L+vG0G3das+OzWzVNe/VlFrg6vuzhGDlzv33cB+1xEj49opEqQPNUGwMF0SzP brqeUTxcu9x7NNWsLpT9jPLOfeG72UjYWA5/wPLMx8ViruM9GQfkbiDM35HgoHG1rc isuzfMLcYglAazkurAfPG82j7a7gMxdJxoUfiBIM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Justin Chen , Paolo Abeni , Sasha Levin Subject: [PATCH 6.8 049/273] net: bcmasp: Bring up unimac after PHY link up Date: Mon, 8 Apr 2024 14:55:24 +0200 Message-ID: <20240408125310.818273704@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240408125309.280181634@linuxfoundation.org> References: <20240408125309.280181634@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Justin Chen [ Upstream commit dfd222e2aef68818320a57b13a1c52a44c22bc80 ] The unimac requires the PHY RX clk during reset or it may be put into a bad state. Bring up the unimac after link up to ensure the PHY RX clk exists. Fixes: 490cb412007d ("net: bcmasp: Add support for ASP2.0 Ethernet controller") Signed-off-by: Justin Chen Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- .../net/ethernet/broadcom/asp2/bcmasp_intf.c | 28 +++++++++++++------ 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c index 6ad1366270f79..78901e2e73032 100644 --- a/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c +++ b/drivers/net/ethernet/broadcom/asp2/bcmasp_intf.c @@ -391,7 +391,9 @@ static void umac_reset(struct bcmasp_intf *intf) umac_wl(intf, 0x0, UMC_CMD); umac_wl(intf, UMC_CMD_SW_RESET, UMC_CMD); usleep_range(10, 100); - umac_wl(intf, 0x0, UMC_CMD); + /* We hold the umac in reset and bring it out of + * reset when phy link is up. + */ } static void umac_set_hw_addr(struct bcmasp_intf *intf, @@ -411,6 +413,8 @@ static void umac_enable_set(struct bcmasp_intf *intf, u32 mask, u32 reg; reg = umac_rl(intf, UMC_CMD); + if (reg & UMC_CMD_SW_RESET) + return; if (enable) reg |= mask; else @@ -429,7 +433,6 @@ static void umac_init(struct bcmasp_intf *intf) umac_wl(intf, 0x800, UMC_FRM_LEN); umac_wl(intf, 0xffff, UMC_PAUSE_CNTRL); umac_wl(intf, 0x800, UMC_RX_MAX_PKT_SZ); - umac_enable_set(intf, UMC_CMD_PROMISC, 1); } static int bcmasp_tx_poll(struct napi_struct *napi, int budget) @@ -656,6 +659,12 @@ static void bcmasp_adj_link(struct net_device *dev) UMC_CMD_HD_EN | UMC_CMD_RX_PAUSE_IGNORE | UMC_CMD_TX_PAUSE_IGNORE); reg |= cmd_bits; + if (reg & UMC_CMD_SW_RESET) { + reg &= ~UMC_CMD_SW_RESET; + umac_wl(intf, reg, UMC_CMD); + udelay(2); + reg |= UMC_CMD_TX_EN | UMC_CMD_RX_EN | UMC_CMD_PROMISC; + } umac_wl(intf, reg, UMC_CMD); intf->eee.eee_active = phy_init_eee(phydev, 0) >= 0; @@ -1063,9 +1072,6 @@ static int bcmasp_netif_init(struct net_device *dev, bool phy_connect) umac_init(intf); - /* Disable the UniMAC RX/TX */ - umac_enable_set(intf, (UMC_CMD_RX_EN | UMC_CMD_TX_EN), 0); - umac_set_hw_addr(intf, dev->dev_addr); intf->old_duplex = -1; @@ -1085,9 +1091,6 @@ static int bcmasp_netif_init(struct net_device *dev, bool phy_connect) bcmasp_enable_rx(intf, 1); - /* Turn on UniMAC TX/RX */ - umac_enable_set(intf, (UMC_CMD_RX_EN | UMC_CMD_TX_EN), 1); - intf->crc_fwd = !!(umac_rl(intf, UMC_CMD) & UMC_CMD_CRC_FWD); bcmasp_netif_start(dev); @@ -1324,7 +1327,14 @@ static void bcmasp_suspend_to_wol(struct bcmasp_intf *intf) if (intf->wolopts & WAKE_FILTER) bcmasp_netfilt_suspend(intf); - /* UniMAC receive needs to be turned on */ + /* Bring UniMAC out of reset if needed and enable RX */ + reg = umac_rl(intf, UMC_CMD); + if (reg & UMC_CMD_SW_RESET) + reg &= ~UMC_CMD_SW_RESET; + + reg |= UMC_CMD_RX_EN | UMC_CMD_PROMISC; + umac_wl(intf, reg, UMC_CMD); + umac_enable_set(intf, UMC_CMD_RX_EN, 1); if (intf->parent->wol_irq > 0) { -- 2.43.0