From patchwork Mon Apr 2 18:33:02 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: stigge@antcom.de X-Patchwork-Id: 150213 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 66633B6EE7 for ; Tue, 3 Apr 2012 04:37:09 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754678Ab2DBSgt (ORCPT ); Mon, 2 Apr 2012 14:36:49 -0400 Received: from mail.work-microwave.de ([62.245.205.51]:39899 "EHLO work-microwave.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754146Ab2DBSeo (ORCPT ); Mon, 2 Apr 2012 14:34:44 -0400 Received: from rst-pc1.lan.work-microwave.de ([192.168.11.78]) (authenticated bits=0) by mail.work-microwave.de with ESMTP id q32IXIsR008156 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 2 Apr 2012 19:33:19 +0100 Received: by rst-pc1.lan.work-microwave.de (Postfix, from userid 1000) id 8A5DCAE065; Mon, 2 Apr 2012 20:33:18 +0200 (CEST) From: Roland Stigge To: arm@kernel.org, linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, w.sang@pengutronix.de, srinivas.bakki@nxp.com, kevin.wells@nxp.com, gregkh@linuxfoundation.org, netdev@vger.kernel.org, rtc-linux@googlegroups.com, a.zummo@towertech.it, linux-watchdog@vger.kernel.org, wim@iguana.be, jonsmirl@gmail.com Cc: Roland Stigge Subject: [PATCH v2 3/8] net: Add device tree support to LPC32xx Date: Mon, 2 Apr 2012 20:33:02 +0200 Message-Id: <1333391587-26290-4-git-send-email-stigge@antcom.de> X-Mailer: git-send-email 1.7.9 In-Reply-To: <1333391587-26290-1-git-send-email-stigge@antcom.de> References: <1333391587-26290-1-git-send-email-stigge@antcom.de> X-FEAS-SYSTEM-WL: rst@work-microwave.de, 192.168.11.78 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch adds device tree support for lpc_eth.c. The runtime option for MII/RMII is solved via the "phy-mode" property, SRAM ("IRAM") usage for DMA can be chosen via "use-iram". Signed-off-by: Roland Stigge --- Applies to v3.4-rc1 Documentation/devicetree/bindings/net/lpc-eth.txt | 24 ++++++ drivers/net/ethernet/nxp/lpc_eth.c | 77 +++++++++++++--------- 2 files changed, 70 insertions(+), 31 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html --- /dev/null +++ linux-2.6/Documentation/devicetree/bindings/net/lpc-eth.txt @@ -0,0 +1,24 @@ +* NXP LPC32xx SoC Ethernet Controller + +Required properties: +- compatible: Should be "nxp,lpc-eth" +- reg: Address and length of the register set for the device +- interrupts: Should contain ethernet controller interrupt + +Optional properties: +- phy-mode: String, operation mode of the PHY interface. + Supported values are: "mii" (default), "rmii" +- use-iram: Use LPC32xx internal SRAM (IRAM) for DMA buffering +- local-mac-address : 6 bytes, mac address + +Example: + + mac: ethernet@31060000 { + compatible = "nxp,lpc-eth"; + reg = <0x31060000 0x1000>; + interrupt-parent = <&mic>; + interrupts = <29 0>; + + phy-mode = "rmii"; + use-iram; + }; --- linux-2.6.orig/drivers/net/ethernet/nxp/lpc_eth.c +++ linux-2.6/drivers/net/ethernet/nxp/lpc_eth.c @@ -340,27 +340,15 @@ */ #define LPC_POWERDOWN_MACAHB (1 << 31) -/* Upon the upcoming introduction of device tree usage in LPC32xx, - * lpc_phy_interface_mode() and use_iram_for_net() will be extended with a - * device parameter for access to device tree information at runtime, instead - * of defining the values at compile time - */ -static inline phy_interface_t lpc_phy_interface_mode(void) +static phy_interface_t lpc_phy_interface_mode(struct device *dev) { -#ifdef CONFIG_ARCH_LPC32XX_MII_SUPPORT + if (dev && dev->of_node) { + const char *mode = of_get_property(dev->of_node, + "phy-mode", NULL); + if (mode && !strcmp(mode, "rmii")) + return PHY_INTERFACE_MODE_RMII; + } return PHY_INTERFACE_MODE_MII; -#else - return PHY_INTERFACE_MODE_RMII; -#endif -} - -static inline int use_iram_for_net(void) -{ -#ifdef CONFIG_ARCH_LPC32XX_IRAM_FOR_NET - return 1; -#else - return 0; -#endif } /* Receive Status information word */ @@ -450,6 +438,7 @@ struct netdata_local { int speed; int duplex; struct napi_struct napi; + bool use_iram; }; /* @@ -664,7 +653,7 @@ static void __lpc_eth_init(struct netdat LPC_ENET_CLRT(pldat->net_base)); writel(LPC_IPGR_LOAD_PART2(0x12), LPC_ENET_IPGR(pldat->net_base)); - if (lpc_phy_interface_mode() == PHY_INTERFACE_MODE_MII) + if (lpc_phy_interface_mode(&pldat->pdev->dev) == PHY_INTERFACE_MODE_MII) writel(LPC_COMMAND_PASSRUNTFRAME, LPC_ENET_COMMAND(pldat->net_base)); else { @@ -804,12 +793,13 @@ static int lpc_mii_probe(struct net_devi } /* Attach to the PHY */ - if (lpc_phy_interface_mode() == PHY_INTERFACE_MODE_MII) + if (lpc_phy_interface_mode(&pldat->pdev->dev) == PHY_INTERFACE_MODE_MII) netdev_info(ndev, "using MII interface\n"); else netdev_info(ndev, "using RMII interface\n"); phydev = phy_connect(ndev, dev_name(&phydev->dev), - &lpc_handle_link_change, 0, lpc_phy_interface_mode()); + &lpc_handle_link_change, 0, + lpc_phy_interface_mode(&pldat->pdev->dev)); if (IS_ERR(phydev)) { netdev_err(ndev, "Could not attach to PHY\n"); @@ -843,7 +833,7 @@ static int lpc_mii_init(struct netdata_l } /* Setup MII mode */ - if (lpc_phy_interface_mode() == PHY_INTERFACE_MODE_MII) + if (lpc_phy_interface_mode(&pldat->pdev->dev) == PHY_INTERFACE_MODE_MII) writel(LPC_COMMAND_PASSRUNTFRAME, LPC_ENET_COMMAND(pldat->net_base)); else { @@ -1315,18 +1305,26 @@ static const struct net_device_ops lpc_n static int lpc_eth_drv_probe(struct platform_device *pdev) { struct resource *res; - struct resource *dma_res; struct net_device *ndev; struct netdata_local *pldat; struct phy_device *phydev; dma_addr_t dma_handle; int irq, ret; + u32 tmp; + + /* Setup network interface for RMII mode */ + tmp = __raw_readl(LPC32XX_CLKPWR_MACCLK_CTRL); + tmp &= ~LPC32XX_CLKPWR_MACCTRL_PINS_MSK; + if (lpc_phy_interface_mode(&pdev->dev) == PHY_INTERFACE_MODE_MII) + tmp |= LPC32XX_CLKPWR_MACCTRL_USE_MII_PINS; + else + tmp |= LPC32XX_CLKPWR_MACCTRL_USE_RMII_PINS; + __raw_writel(tmp, LPC32XX_CLKPWR_MACCLK_CTRL); /* Get platform resources */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - dma_res = platform_get_resource(pdev, IORESOURCE_MEM, 1); irq = platform_get_irq(pdev, 0); - if ((!res) || (!dma_res) || (irq < 0) || (irq >= NR_IRQS)) { + if ((!res) || (irq < 0) || (irq >= NR_IRQS)) { dev_err(&pdev->dev, "error getting resources.\n"); ret = -ENXIO; goto err_exit; @@ -1348,6 +1346,12 @@ static int lpc_eth_drv_probe(struct plat spin_lock_init(&pldat->lock); + if (pdev->dev.of_node && of_get_property(pdev->dev.of_node, + "use-iram", NULL)) + pldat->use_iram = true; + else + pldat->use_iram = false; + /* Save resources */ ndev->irq = irq; @@ -1389,17 +1393,19 @@ static int lpc_eth_drv_probe(struct plat sizeof(struct txrx_desc_t) + sizeof(struct rx_status_t)); pldat->dma_buff_base_v = 0; - if (use_iram_for_net()) { - dma_handle = dma_res->start; + if (pldat->use_iram) { + dma_handle = LPC32XX_IRAM_BASE; if (pldat->dma_buff_size <= lpc32xx_return_iram_size()) pldat->dma_buff_base_v = - io_p2v(dma_res->start); + io_p2v(LPC32XX_IRAM_BASE); else netdev_err(ndev, "IRAM not big enough for net buffers, using SDRAM instead.\n"); } if (pldat->dma_buff_base_v == 0) { + pldat->pdev->dev.coherent_dma_mask = 0xFFFFFFFF; + pldat->pdev->dev.dma_mask = &pldat->pdev->dev.coherent_dma_mask; pldat->dma_buff_size = PAGE_ALIGN(pldat->dma_buff_size); /* Allocate a chunk of memory for the DMA ethernet buffers @@ -1488,7 +1494,7 @@ err_out_unregister_netdev: platform_set_drvdata(pdev, NULL); unregister_netdev(ndev); err_out_dma_unmap: - if (!use_iram_for_net() || + if (!pldat->use_iram || pldat->dma_buff_size > lpc32xx_return_iram_size()) dma_free_coherent(&pldat->pdev->dev, pldat->dma_buff_size, pldat->dma_buff_base_v, @@ -1515,7 +1521,7 @@ static int lpc_eth_drv_remove(struct pla unregister_netdev(ndev); platform_set_drvdata(pdev, NULL); - if (!use_iram_for_net() || + if (!pldat->use_iram || pldat->dma_buff_size > lpc32xx_return_iram_size()) dma_free_coherent(&pldat->pdev->dev, pldat->dma_buff_size, pldat->dma_buff_base_v, @@ -1584,6 +1590,14 @@ static int lpc_eth_drv_resume(struct pla } #endif +#ifdef CONFIG_OF +static const struct of_device_id lpc_eth_match[] = { + { .compatible = "nxp,lpc-eth" }, + { } +}; +MODULE_DEVICE_TABLE(of, lpc_eth_match); +#endif + static struct platform_driver lpc_eth_driver = { .probe = lpc_eth_drv_probe, .remove = __devexit_p(lpc_eth_drv_remove), @@ -1593,6 +1607,7 @@ static struct platform_driver lpc_eth_dr #endif .driver = { .name = MODNAME, + .of_match_table = of_match_ptr(lpc_eth_match), }, };