avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/net/xilinx_ll_temac.c

@@ -0,0 +1,403 @@
+/*
+ * Xilinx xps_ll_temac ethernet driver for u-boot
+ *
+ * supports SDMA or FIFO access and MDIO bus communication
+ *
+ * Copyright (C) 2011 - 2012 Stephan Linz <linz@li-pro.net>
+ * Copyright (C) 2008 - 2011 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2008 - 2011 PetaLogix
+ *
+ * Based on Yoshio Kashiwagi kashiwagi@co-nss.co.jp driver
+ * Copyright (C) 2008 Nissin Systems Co.,Ltd.
+ * March 2008 created
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * [0]: http://www.xilinx.com/support/documentation
+ *
+ * [S]:	[0]/ip_documentation/xps_ll_temac.pdf
+ * [A]:	[0]/application_notes/xapp1041.pdf
+ */
+
+#include <config.h>
+#include <common.h>
+#include <net.h>
+#include <netdev.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <miiphy.h>
+
+#include "xilinx_ll_temac.h"
+#include "xilinx_ll_temac_fifo.h"
+#include "xilinx_ll_temac_sdma.h"
+#include "xilinx_ll_temac_mdio.h"
+
+#if !defined(CONFIG_MII)
+# error "LL_TEMAC requires MII -- missing CONFIG_MII"
+#endif
+
+#if !defined(CONFIG_PHYLIB)
+# error "LL_TEMAC requires PHYLIB -- missing CONFIG_PHYLIB"
+#endif
+
+struct ll_temac_info {
+	int			flags;
+	unsigned long		base_addr;
+	unsigned long		ctrl_addr;
+	char			*devname;
+	unsigned int		phyaddr;
+	char			*mdio_busname;
+};
+
+/* Ethernet interface ready status */
+int ll_temac_check_status(struct temac_reg *regs, u32 mask)
+{
+	unsigned timeout = 50;	/* 1usec * 50 = 50usec */
+
+	/*
+	 * Quote from LL TEMAC documentation: The bits in the RDY
+	 * register are asserted when there is no access in progress.
+	 * When an access is in progress, a bit corresponding to the
+	 * type of access is automatically de-asserted. The bit is
+	 * automatically re-asserted when the access is complete.
+	 */
+	while (timeout && (!(in_be32(&regs->rdy) & mask))) {
+		timeout--;
+		udelay(1);
+	}
+
+	if (!timeout) {
+		printf("%s: Timeout on 0x%08x @%p\n", __func__,
+				mask, &regs->rdy);
+		return 1;
+	}
+
+	return 0;
+}
+
+/*
+ * Indirect write to ll_temac.
+ *
+ * http://www.xilinx.com/support/documentation/ip_documentation/xps_ll_temac.pdf
+ * page 23, second paragraph, The use of CTL0 register or CTL1 register
+ */
+int ll_temac_indirect_set(struct temac_reg *regs, u16 regn, u32 reg_data)
+{
+	out_be32(&regs->lsw, (reg_data & MLSW_MASK));
+	out_be32(&regs->ctl, CTL_WEN | (regn & CTL_ADDR_MASK));
+
+	if (ll_temac_check_status(regs, RSE_CFG_WR))
+		return 0;
+
+	return 1;
+}
+
+/*
+ * Indirect read from ll_temac.
+ *
+ * http://www.xilinx.com/support/documentation/ip_documentation/xps_ll_temac.pdf
+ * page 23, second paragraph, The use of CTL0 register or CTL1 register
+ */
+int ll_temac_indirect_get(struct temac_reg *regs, u16 regn, u32* reg_data)
+{
+	out_be32(&regs->ctl, (regn & CTL_ADDR_MASK));
+
+	if (ll_temac_check_status(regs, RSE_CFG_RR))
+		return 0;
+
+	*reg_data = in_be32(&regs->lsw) & MLSW_MASK;
+	return 1;
+}
+
+/* setting sub-controller and ll_temac to proper setting */
+static int ll_temac_setup_ctrl(struct eth_device *dev)
+{
+	struct ll_temac *ll_temac = dev->priv;
+	struct temac_reg *regs = (struct temac_reg *)dev->iobase;
+
+	if (ll_temac->ctrlreset && ll_temac->ctrlreset(dev))
+		return 0;
+
+	if (ll_temac->ctrlinit && ll_temac->ctrlinit(dev))
+		return 0;
+
+	/* Promiscuous mode disable */
+	if (!ll_temac_indirect_set(regs, TEMAC_AFM, 0))
+		return 0;
+
+	/* Enable Receiver - RX bit */
+	if (!ll_temac_indirect_set(regs, TEMAC_RCW1, RCW1_RX))
+		return 0;
+
+	/* Enable Transmitter - TX bit */
+	if (!ll_temac_indirect_set(regs, TEMAC_TC, TC_TX))
+		return 0;
+
+	return 1;
+}
+
+/*
+ * Configure ll_temac based on negotiated speed and duplex
+ * reported by PHY handling code
+ */
+static int ll_temac_adjust_link(struct eth_device *dev)
+{
+	unsigned int speed, emmc_reg;
+	struct temac_reg *regs = (struct temac_reg *)dev->iobase;
+	struct ll_temac *ll_temac = dev->priv;
+	struct phy_device *phydev = ll_temac->phydev;
+
+	if (!phydev->link) {
+		printf("%s: No link.\n", phydev->dev->name);
+		return 0;
+	}
+
+	switch (phydev->speed) {
+	case 1000:
+		speed = EMMC_LSPD_1000;
+		break;
+	case 100:
+		speed = EMMC_LSPD_100;
+		break;
+	case 10:
+		speed = EMMC_LSPD_10;
+		break;
+	default:
+		return 0;
+	}
+
+	if (!ll_temac_indirect_get(regs, TEMAC_EMMC, &emmc_reg))
+		return 0;
+
+	emmc_reg &= ~EMMC_LSPD_MASK;
+	emmc_reg |= speed;
+
+	if (!ll_temac_indirect_set(regs, TEMAC_EMMC, emmc_reg))
+		return 0;
+
+	printf("%s: PHY is %s with %dbase%s, %s%s\n",
+			dev->name, phydev->drv->name,
+			phydev->speed, (phydev->port == PORT_TP) ? "T" : "X",
+			(phydev->duplex) ? "FDX" : "HDX",
+			(phydev->port == PORT_OTHER) ? ", unkown mode" : "");
+
+	return 1;
+}
+
+/* setup mac addr */
+static int ll_temac_setup_mac_addr(struct eth_device *dev)
+{
+	struct temac_reg *regs = (struct temac_reg *)dev->iobase;
+	u32 val;
+
+	/* set up unicast MAC address filter */
+	val = ((dev->enetaddr[3] << 24) | (dev->enetaddr[2] << 16) |
+			(dev->enetaddr[1] << 8) | (dev->enetaddr[0]));
+	val &= UAW0_UADDR_MASK;
+
+	if (!ll_temac_indirect_set(regs, TEMAC_UAW0, val))
+		return 1;
+
+	val = ((dev->enetaddr[5] << 8) | dev->enetaddr[4]);
+	val &= UAW1_UADDR_MASK;
+
+	if (!ll_temac_indirect_set(regs, TEMAC_UAW1, val))
+		return 1;
+
+	return 0;
+}
+
+/* halt device */
+static void ll_temac_halt(struct eth_device *dev)
+{
+	struct ll_temac *ll_temac = dev->priv;
+	struct temac_reg *regs = (struct temac_reg *)dev->iobase;
+
+	/* Disable Receiver */
+	ll_temac_indirect_set(regs, TEMAC_RCW0, 0);
+
+	/* Disable Transmitter */
+	ll_temac_indirect_set(regs, TEMAC_TC, 0);
+
+	if (ll_temac->ctrlhalt)
+		ll_temac->ctrlhalt(dev);
+
+	/* Shut down the PHY, as needed */
+	phy_shutdown(ll_temac->phydev);
+}
+
+static int ll_temac_init(struct eth_device *dev, bd_t *bis)
+{
+	struct ll_temac *ll_temac = dev->priv;
+	int ret;
+
+	printf("%s: Xilinx XPS LocalLink Tri-Mode Ether MAC #%d at 0x%08lx.\n",
+		dev->name, dev->index, dev->iobase);
+
+	if (!ll_temac_setup_ctrl(dev))
+		return -1;
+
+	/* Start up the PHY */
+	ret = phy_startup(ll_temac->phydev);
+	if (ret) {
+		printf("%s: Could not initialize PHY %s\n",
+		       dev->name, ll_temac->phydev->dev->name);
+		return ret;
+	}
+
+	if (!ll_temac_adjust_link(dev)) {
+		ll_temac_halt(dev);
+		return -1;
+	}
+
+	/* If there's no link, fail */
+	return ll_temac->phydev->link ? 0 : -1;
+}
+
+/*
+ * Discover which PHY is attached to the device, and configure it
+ * properly.  If the PHY is not recognized, then return 0
+ * (failure).  Otherwise, return 1
+ */
+static int ll_temac_phy_init(struct eth_device *dev)
+{
+	struct ll_temac *ll_temac = dev->priv;
+	struct phy_device *phydev;
+	unsigned int supported = PHY_GBIT_FEATURES;
+
+	/* interface - look at driver/net/tsec.c */
+	phydev = phy_connect(ll_temac->bus, ll_temac->phyaddr,
+			dev, PHY_INTERFACE_MODE_NONE);
+
+	phydev->supported &= supported;
+	phydev->advertising = phydev->supported;
+
+	ll_temac->phydev = phydev;
+
+	phy_config(phydev);
+
+	return 1;
+}
+
+/*
+ * Initialize a single ll_temac devices
+ *
+ * Returns the result of ll_temac phy interface that were initialized
+ */
+int xilinx_ll_temac_initialize(bd_t *bis, struct ll_temac_info *devinf)
+{
+	struct eth_device *dev;
+	struct ll_temac *ll_temac;
+
+	dev = calloc(1, sizeof(*dev));
+	if (dev == NULL)
+		return 0;
+
+	ll_temac = calloc(1, sizeof(struct ll_temac));
+	if (ll_temac == NULL) {
+		free(dev);
+		return 0;
+	}
+
+	/* use given name or generate its own unique name */
+	if (devinf->devname) {
+		strncpy(dev->name, devinf->devname, sizeof(dev->name));
+	} else {
+		snprintf(dev->name, sizeof(dev->name), "ll_tem.%lx",
+			 devinf->base_addr);
+		devinf->devname = dev->name;
+	}
+
+	dev->iobase = devinf->base_addr;
+
+	dev->priv = ll_temac;
+	dev->init = ll_temac_init;
+	dev->halt = ll_temac_halt;
+	dev->write_hwaddr = ll_temac_setup_mac_addr;
+
+	ll_temac->ctrladdr = devinf->ctrl_addr;
+	if (devinf->flags & XILINX_LL_TEMAC_M_SDMA_PLB) {
+#if defined(CONFIG_XILINX_440) || defined(CONFIG_XILINX_405)
+		if (devinf->flags & XILINX_LL_TEMAC_M_SDMA_DCR) {
+			ll_temac_collect_xldcr_sdma_reg_addr(dev);
+			ll_temac->in32 = ll_temac_xldcr_in32;
+			ll_temac->out32 = ll_temac_xldcr_out32;
+		} else
+#endif
+		{
+			ll_temac_collect_xlplb_sdma_reg_addr(dev);
+			ll_temac->in32 = ll_temac_xlplb_in32;
+			ll_temac->out32 = ll_temac_xlplb_out32;
+		}
+		ll_temac->ctrlinit = ll_temac_init_sdma;
+		ll_temac->ctrlhalt = ll_temac_halt_sdma;
+		ll_temac->ctrlreset = ll_temac_reset_sdma;
+		dev->recv = ll_temac_recv_sdma;
+		dev->send = ll_temac_send_sdma;
+	} else {
+		ll_temac->in32 = NULL;
+		ll_temac->out32 = NULL;
+		ll_temac->ctrlinit = NULL;
+		ll_temac->ctrlhalt = NULL;
+		ll_temac->ctrlreset = ll_temac_reset_fifo;
+		dev->recv = ll_temac_recv_fifo;
+		dev->send = ll_temac_send_fifo;
+	}
+
+	/* Link to specified MDIO bus */
+	strncpy(ll_temac->mdio_busname, devinf->mdio_busname, MDIO_NAME_LEN);
+	ll_temac->bus = miiphy_get_dev_by_name(ll_temac->mdio_busname);
+
+	/* Looking for a valid PHY address if it is not yet set */
+	if (devinf->phyaddr == -1)
+		ll_temac->phyaddr = ll_temac_phy_addr(ll_temac->bus);
+	else
+		ll_temac->phyaddr = devinf->phyaddr;
+
+	eth_register(dev);
+
+	/* Try to initialize PHY here, and return */
+	return ll_temac_phy_init(dev);
+}
+
+/*
+ * Initialize a single ll_temac device with its mdio bus behind ll_temac
+ *
+ * Returns 1 if the ll_temac device and the mdio bus were initialized
+ * otherwise returns 0
+ */
+int xilinx_ll_temac_eth_init(bd_t *bis, unsigned long base_addr, int flags,
+							unsigned long ctrl_addr)
+{
+	struct ll_temac_info devinf;
+	struct ll_temac_mdio_info mdioinf;
+	int ret;
+
+	/* prepare the internal driver informations */
+	devinf.flags = flags;
+	devinf.base_addr = base_addr;
+	devinf.ctrl_addr = ctrl_addr;
+	devinf.devname = NULL;
+	devinf.phyaddr = -1;
+
+	mdioinf.name = devinf.mdio_busname = NULL;
+	mdioinf.regs = (struct temac_reg *)devinf.base_addr;
+
+	ret = xilinx_ll_temac_mdio_initialize(bis, &mdioinf);
+	if (ret >= 0) {
+
+		/*
+		 * If there was no MDIO bus name then take over the
+		 * new automaticaly generated by the MDIO init code.
+		 */
+		if (mdioinf.name != devinf.mdio_busname)
+			devinf.mdio_busname = mdioinf.name;
+
+		ret = xilinx_ll_temac_initialize(bis, &devinf);
+		if (ret > 0)
+			return 1;
+
+	}
+
+	return 0;
+}