[U-Boot] [PATCH v4 1/5] Add support for SMSC95XX USB 2.0 10/100MBit Ethernet Adapter

[U-Boot] [PATCH v4 1/5] Add support for SMSC95XX USB 2.0 10/100MBit Ethernet Adapter

[Simon Glass]

The SMSC95XX is a USB hub with a built-in Ethernet adapter. This adds support
for this, using the USB host network framework.

TEST=usb start; bootp; tftp ...

Signed-off-by: Simon Glass <sjg@chromium.org>

---
Changes for v2:
   - Coding style cleanup
   - Changed some comments as suggested
   - eth_set_hwaddr -> eth_write_hwaddr
   - tided up other users of eth_getenv_enetaddr_by_index()

Changes for v3:
   - Drop tfpserverip patch
   - Change turbo_mode to #define
   - Fix tfpserverip patch bleed

Changes for v4:
   - Dropped Tegra2 specific bit
   - Added patch in place of tftpserverip patch, to speed up successive network commands on asix
   - Fixed a few broken bits in SMSC from my testing

---
 drivers/usb/eth/Makefile    |    1 +
 drivers/usb/eth/smsc95xx.c  |  921 +++++++++++++++++++++++++++++++++++++++++++
 drivers/usb/eth/usb_ether.c |    7 +
 include/usb_ether.h         |   13 +
 4 files changed, 942 insertions(+), 0 deletions(-)
 create mode 100644 drivers/usb/eth/smsc95xx.c

diff --git a/drivers/usb/eth/Makefile b/drivers/usb/eth/Makefile
index 6a5f25a..e28793d 100644
--- a/drivers/usb/eth/Makefile
+++ b/drivers/usb/eth/Makefile
@@ -28,6 +28,7 @@ COBJS-$(CONFIG_USB_HOST_ETHER) += usb_ether.o
 ifdef CONFIG_USB_ETHER_ASIX
 COBJS-y += asix.o
 endif
+COBJS-$(CONFIG_USB_ETHER_SMSC95XX) += smsc95xx.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
diff --git a/drivers/usb/eth/smsc95xx.c b/drivers/usb/eth/smsc95xx.c
new file mode 100644
index 0000000..6a2290f
--- /dev/null
+++ b/drivers/usb/eth/smsc95xx.c
@@ -0,0 +1,921 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * Copyright (C) 2009 NVIDIA, Corporation
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <usb.h>
+#include <linux/mii.h>
+#include "usb_ether.h"
+
+/* SMSC LAN95xx based USB 2.0 Ethernet Devices */
+
+/* Tx command words */
+#define TX_CMD_A_FIRST_SEG_		(0x00002000)
+#define TX_CMD_A_LAST_SEG_		(0x00001000)
+
+/* Rx status word */
+#define RX_STS_FL_			(0x3FFF0000)	/* Frame Length */
+#define RX_STS_ES_			(0x00008000)	/* Error Summary */
+
+/* SCSRs */
+#define ID_REV				(0x00)
+
+#define INT_STS				(0x08)
+
+#define TX_CFG				(0x10)
+#define TX_CFG_ON_			(0x00000004)
+
+#define HW_CFG				(0x14)
+#define HW_CFG_BIR_			(0x00001000)
+#define HW_CFG_RXDOFF_			(0x00000600)
+#define HW_CFG_MEF_			(0x00000020)
+#define HW_CFG_BCE_			(0x00000002)
+#define HW_CFG_LRST_			(0x00000008)
+
+#define PM_CTRL				(0x20)
+#define PM_CTL_PHY_RST_			(0x00000010)
+
+#define AFC_CFG				(0x2C)
+
+/*
+ * Hi watermark = 15.5Kb (~10 mtu pkts)
+ * low watermark = 3k (~2 mtu pkts)
+ * backpressure duration = ~ 350us
+ * Apply FC on any frame.
+ */
+#define AFC_CFG_DEFAULT			(0x00F830A1)
+
+#define E2P_CMD				(0x30)
+#define E2P_CMD_BUSY_			(0x80000000)
+#define E2P_CMD_READ_			(0x00000000)
+#define E2P_CMD_TIMEOUT_		(0x00000400)
+#define E2P_CMD_LOADED_			(0x00000200)
+#define E2P_CMD_ADDR_			(0x000001FF)
+
+#define E2P_DATA			(0x34)
+
+#define BURST_CAP			(0x38)
+
+#define INT_EP_CTL			(0x68)
+#define INT_EP_CTL_PHY_INT_		(0x00008000)
+
+#define BULK_IN_DLY			(0x6C)
+
+/* MAC CSRs */
+#define MAC_CR				(0x100)
+#define MAC_CR_MCPAS_			(0x00080000)
+#define MAC_CR_PRMS_			(0x00040000)
+#define MAC_CR_HPFILT_			(0x00002000)
+#define MAC_CR_TXEN_			(0x00000008)
+#define MAC_CR_RXEN_			(0x00000004)
+
+#define ADDRH				(0x104)
+
+#define ADDRL				(0x108)
+
+#define MII_ADDR			(0x114)
+#define MII_WRITE_			(0x02)
+#define MII_BUSY_			(0x01)
+#define MII_READ_			(0x00) /* ~of MII Write bit */
+
+#define MII_DATA			(0x118)
+
+#define FLOW				(0x11C)
+
+#define VLAN1				(0x120)
+
+#define COE_CR				(0x130)
+#define Tx_COE_EN_			(0x00010000)
+#define Rx_COE_EN_			(0x00000001)
+
+/* Vendor-specific PHY Definitions */
+#define PHY_INT_SRC			(29)
+
+#define PHY_INT_MASK			(30)
+#define PHY_INT_MASK_ANEG_COMP_		((u16)0x0040)
+#define PHY_INT_MASK_LINK_DOWN_		((u16)0x0010)
+#define PHY_INT_MASK_DEFAULT_		(PHY_INT_MASK_ANEG_COMP_ | \
+					 PHY_INT_MASK_LINK_DOWN_)
+
+/* USB Vendor Requests */
+#define USB_VENDOR_REQUEST_WRITE_REGISTER	0xA0
+#define USB_VENDOR_REQUEST_READ_REGISTER	0xA1
+
+/* Some extra defines */
+#define HS_USB_PKT_SIZE			(512)
+#define FS_USB_PKT_SIZE			(64)
+#define DEFAULT_HS_BURST_CAP_SIZE	(16 * 1024 + 5 * HS_USB_PKT_SIZE)
+#define DEFAULT_FS_BURST_CAP_SIZE	(6 * 1024 + 33 * FS_USB_PKT_SIZE)
+#define DEFAULT_BULK_IN_DELAY		(0x00002000)
+#define MAX_SINGLE_PACKET_SIZE		(2048)
+#define EEPROM_MAC_OFFSET		(0x01)
+#define SMSC95XX_INTERNAL_PHY_ID	(1)
+#define ETH_P_8021Q	0x8100          /* 802.1Q VLAN Extended Header  */
+
+/* local defines */
+#define SMSC95XX_BASE_NAME "sms"
+#define USB_CTRL_SET_TIMEOUT 5000
+#define USB_CTRL_GET_TIMEOUT 5000
+#define USB_BULK_SEND_TIMEOUT 5000
+#define USB_BULK_RECV_TIMEOUT 5000
+
+#define AX_RX_URB_SIZE 2048
+#define PHY_CONNECT_TIMEOUT 5000
+
+#define TURBO_MODE
+
+/* local vars */
+static int curr_eth_dev; /* index for name of next device detected */
+
+
+/*
+ * Smsc95xx infrastructure commands
+ */
+static int smsc95xx_write_reg(struct ueth_data *dev, u32 index, u32 data)
+{
+	int len;
+
+	cpu_to_le32s(&data);
+
+	len = usb_control_msg(dev->pusb_dev, usb_sndctrlpipe(dev->pusb_dev, 0),
+		USB_VENDOR_REQUEST_WRITE_REGISTER,
+		USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		00, index, &data, sizeof(data), USB_CTRL_SET_TIMEOUT);
+
+	return len == sizeof(data) ? 0 : -1;
+}
+
+static int smsc95xx_read_reg(struct ueth_data *dev, u32 index, u32 *data)
+{
+	int len;
+
+	len = usb_control_msg(dev->pusb_dev, usb_rcvctrlpipe(dev->pusb_dev, 0),
+		USB_VENDOR_REQUEST_READ_REGISTER,
+		USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+		00, index, data, sizeof(data), USB_CTRL_GET_TIMEOUT);
+
+	le32_to_cpus(data);
+	return len == sizeof(data) ? 0 : -1;
+}
+
+/* Loop until the read is completed with timeout */
+static int smsc95xx_phy_wait_not_busy(struct ueth_data *dev)
+{
+	unsigned long start_time = get_timer(0);
+	u32 val;
+
+	do {
+		smsc95xx_read_reg(dev, MII_ADDR, &val);
+		if (!(val & MII_BUSY_))
+			return 0;
+	} while (get_timer(start_time) < 1 * 1000 * 1000);
+
+	return -1;
+}
+
+static int smsc95xx_mdio_read(struct ueth_data *dev, int phy_id, int idx)
+{
+	u32 val, addr;
+
+	/* confirm MII not busy */
+	if (smsc95xx_phy_wait_not_busy(dev)) {
+		debug("MII is busy in smsc95xx_mdio_read\n");
+		return -1;
+	}
+
+	/* set the address, index & direction (read from PHY) */
+	addr = (phy_id << 11) | (idx << 6) | MII_READ_;
+	smsc95xx_write_reg(dev, MII_ADDR, addr);
+
+	if (smsc95xx_phy_wait_not_busy(dev)) {
+		debug("Timed out reading MII reg %02X\n", idx);
+		return -1;
+	}
+
+	smsc95xx_read_reg(dev, MII_DATA, &val);
+
+	return (u16)(val & 0xFFFF);
+}
+
+static void smsc95xx_mdio_write(struct ueth_data *dev, int phy_id, int idx,
+				int regval)
+{
+	u32 val, addr;
+
+	/* confirm MII not busy */
+	if (smsc95xx_phy_wait_not_busy(dev)) {
+		debug("MII is busy in smsc95xx_mdio_write\n");
+		return;
+	}
+
+	val = regval;
+	smsc95xx_write_reg(dev, MII_DATA, val);
+
+	/* set the address, index & direction (write to PHY) */
+	addr = (phy_id << 11) | (idx << 6) | MII_WRITE_;
+	smsc95xx_write_reg(dev, MII_ADDR, addr);
+
+	if (smsc95xx_phy_wait_not_busy(dev))
+		debug("Timed out writing MII reg %02X\n", idx);
+}
+
+static int smsc95xx_eeprom_confirm_not_busy(struct ueth_data *dev)
+{
+	unsigned long start_time = get_timer(0);
+	u32 val;
+
+	do {
+		smsc95xx_read_reg(dev, E2P_CMD, &val);
+		if (!(val & E2P_CMD_LOADED_)) {
+			debug("No EEPROM present\n");
+			return -1;
+		}
+		if (!(val & E2P_CMD_BUSY_))
+			return 0;
+		udelay(40);
+	} while (get_timer(start_time) < 1 * 1000 * 1000);
+
+	debug("EEPROM is busy\n");
+	return -1;
+}
+
+static int smsc95xx_wait_eeprom(struct ueth_data *dev)
+{
+	unsigned long start_time = get_timer(0);
+	u32 val;
+
+	do {
+		smsc95xx_read_reg(dev, E2P_CMD, &val);
+		if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
+			break;
+		udelay(40);
+	} while (get_timer(start_time) < 1 * 1000 * 1000);
+
+	if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
+		debug("EEPROM read operation timeout\n");
+		return -1;
+	}
+	return 0;
+}
+
+static int smsc95xx_read_eeprom(struct ueth_data *dev, u32 offset, u32 length,
+				u8 *data)
+{
+	u32 val;
+	int i, ret;
+
+	ret = smsc95xx_eeprom_confirm_not_busy(dev);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < length; i++) {
+		val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
+		smsc95xx_write_reg(dev, E2P_CMD, val);
+
+		ret = smsc95xx_wait_eeprom(dev);
+		if (ret < 0)
+			return ret;
+
+		smsc95xx_read_reg(dev, E2P_DATA, &val);
+		data[i] = val & 0xFF;
+		offset++;
+	}
+	return 0;
+}
+
+/*
+ * mii_nway_restart - restart NWay (autonegotiation) for this interface
+ *
+ * Returns 0 on success, negative on error.
+ */
+static int mii_nway_restart(struct ueth_data *dev)
+{
+	int bmcr;
+	int r = -1;
+
+	/* if autoneg is off, it's an error */
+	bmcr = smsc95xx_mdio_read(dev, dev->phy_id, MII_BMCR);
+
+	if (bmcr & BMCR_ANENABLE) {
+		bmcr |= BMCR_ANRESTART;
+		smsc95xx_mdio_write(dev, dev->phy_id, MII_BMCR, bmcr);
+		r = 0;
+	}
+	return r;
+}
+
+static int smsc95xx_phy_initialize(struct ueth_data *dev)
+{
+	smsc95xx_mdio_write(dev, dev->phy_id, MII_BMCR, BMCR_RESET);
+	smsc95xx_mdio_write(dev, dev->phy_id, MII_ADVERTISE,
+		ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
+		ADVERTISE_PAUSE_ASYM);
+
+	/* read to clear */
+	smsc95xx_mdio_read(dev, dev->phy_id, PHY_INT_SRC);
+
+	smsc95xx_mdio_write(dev, dev->phy_id, PHY_INT_MASK,
+		PHY_INT_MASK_DEFAULT_);
+	mii_nway_restart(dev);
+
+	debug("phy initialised succesfully\n");
+	return 0;
+}
+
+static int smsc95xx_init_mac_address(struct eth_device *eth,
+		struct ueth_data *dev)
+{
+	/* try reading mac address from EEPROM */
+	if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
+			eth->enetaddr) == 0) {
+		if (is_valid_ether_addr(eth->enetaddr)) {
+			/* eeprom values are valid so use them */
+			debug("MAC address read from EEPROM\n");
+			return 0;
+		}
+	}
+
+	/*
+	 * No eeprom, or eeprom values are invalid. Generating a random MAC
+	 * address is not safe. Just return an error.
+	 */
+	return -1;
+}
+
+static int smsc95xx_write_hwaddr(struct eth_device *eth)
+{
+	struct ueth_data *dev = (struct ueth_data *)eth->priv;
+	u32 addr_lo, addr_hi;
+	int ret;
+
+	/* set hardware address */
+	debug("** %s()\n", __func__);
+	addr_lo = cpu_to_le32(*((u32 *)eth->enetaddr));
+	addr_hi = cpu_to_le16(*((u16 *)(eth->enetaddr + 4)));
+	ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
+	if (ret < 0) {
+		debug("Failed to write ADDRL: %d\n", ret);
+		return ret;
+	}
+
+	ret = smsc95xx_write_reg(dev, ADDRH, addr_hi);
+	if (ret < 0) {
+		debug("Failed to write ADDRH: %d\n", ret);
+		return ret;
+	}
+	debug("MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
+		eth->enetaddr[0], eth->enetaddr[1],
+		eth->enetaddr[2], eth->enetaddr[3],
+		eth->enetaddr[4], eth->enetaddr[5]);
+	dev->have_hwaddr = 1;
+	return 0;
+}
+
+/* Enable or disable Tx & Rx checksum offload engines */
+static int smsc95xx_set_csums(struct ueth_data *dev,
+		int use_tx_csum, int use_rx_csum)
+{
+	u32 read_buf;
+	int ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
+	if (ret < 0) {
+		debug("Failed to read COE_CR: %d\n", ret);
+		return ret;
+	}
+
+	if (use_tx_csum)
+		read_buf |= Tx_COE_EN_;
+	else
+		read_buf &= ~Tx_COE_EN_;
+
+	if (use_rx_csum)
+		read_buf |= Rx_COE_EN_;
+	else
+		read_buf &= ~Rx_COE_EN_;
+
+	ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
+	if (ret < 0) {
+		debug("Failed to write COE_CR: %d\n", ret);
+		return ret;
+	}
+
+	debug("COE_CR = 0x%08x\n", read_buf);
+	return 0;
+}
+
+static void smsc95xx_set_multicast(struct ueth_data *dev)
+{
+	/* No multicast in u-boot */
+	dev->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
+}
+
+/* starts the TX path */
+static void smsc95xx_start_tx_path(struct ueth_data *dev)
+{
+	u32 reg_val;
+
+	/* Enable Tx at MAC */
+	dev->mac_cr |= MAC_CR_TXEN_;
+
+	smsc95xx_write_reg(dev, MAC_CR, dev->mac_cr);
+
+	/* Enable Tx at SCSRs */
+	reg_val = TX_CFG_ON_;
+	smsc95xx_write_reg(dev, TX_CFG, reg_val);
+}
+
+/* Starts the Receive path */
+static void smsc95xx_start_rx_path(struct ueth_data *dev)
+{
+	dev->mac_cr |= MAC_CR_RXEN_;
+	smsc95xx_write_reg(dev, MAC_CR, dev->mac_cr);
+}
+
+/*
+ * Smsc95xx callbacks
+ */
+static int smsc95xx_init(struct eth_device *eth, bd_t *bd)
+{
+	int ret;
+	u32 write_buf;
+	u32 read_buf;
+	u32 burst_cap;
+	int timeout;
+	struct ueth_data *dev = (struct ueth_data *)eth->priv;
+#define TIMEOUT_RESOLUTION 50	/* ms */
+	int link_detected;
+
+	debug("** %s()\n", __func__);
+	dev->phy_id = SMSC95XX_INTERNAL_PHY_ID; /* fixed phy id */
+
+	write_buf = HW_CFG_LRST_;
+	ret = smsc95xx_write_reg(dev, HW_CFG, write_buf);
+	if (ret < 0) {
+		debug("Failed to write HW_CFG_LRST_ bit in HW_CFG "
+			"register, ret = %d\n", ret);
+		return ret;
+	}
+
+	timeout = 0;
+	do {
+		ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
+		if (ret < 0) {
+			debug("Failed to read HW_CFG: %d\n", ret);
+			return ret;
+		}
+		udelay(10 * 1000);
+		timeout++;
+	} while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
+
+	if (timeout >= 100) {
+		debug("timeout waiting for completion of Lite Reset\n");
+		return -1;
+	}
+
+	write_buf = PM_CTL_PHY_RST_;
+	ret = smsc95xx_write_reg(dev, PM_CTRL, write_buf);
+	if (ret < 0) {
+		debug("Failed to write PM_CTRL: %d\n", ret);
+		return ret;
+	}
+
+	timeout = 0;
+	do {
+		ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
+		if (ret < 0) {
+			debug("Failed to read PM_CTRL: %d\n", ret);
+			return ret;
+		}
+		udelay(10 * 1000);
+		timeout++;
+	} while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
+	if (timeout >= 100) {
+		debug("timeout waiting for PHY Reset\n");
+		return -1;
+	}
+	if (!dev->have_hwaddr && smsc95xx_init_mac_address(eth, dev) == 0)
+		dev->have_hwaddr = 1;
+	if (!dev->have_hwaddr) {
+		puts("Error: SMSC95xx: No MAC address set - set usbethaddr\n");
+		return -1;
+	}
+	if (smsc95xx_write_hwaddr(eth) < 0)
+		return -1;
+
+	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
+	if (ret < 0) {
+		debug("Failed to read HW_CFG: %d\n", ret);
+		return ret;
+	}
+	debug("Read Value from HW_CFG : 0x%08x\n", read_buf);
+
+	read_buf |= HW_CFG_BIR_;
+	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
+	if (ret < 0) {
+		debug("Failed to write HW_CFG_BIR_ bit in HW_CFG "
+			"register, ret = %d\n", ret);
+		return ret;
+	}
+
+	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
+	if (ret < 0) {
+		debug("Failed to read HW_CFG: %d\n", ret);
+		return ret;
+	}
+	debug("Read Value from HW_CFG after writing "
+		"HW_CFG_BIR_: 0x%08x\n", read_buf);
+
+#ifdef TURBO_MODE
+	if (dev->pusb_dev->speed == USB_SPEED_HIGH) {
+		burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
+		dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
+	} else {
+		burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
+		dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
+	}
+#else
+	burst_cap = 0;
+	dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
+#endif
+	debug("rx_urb_size=%ld\n", (ulong)dev->rx_urb_size);
+
+	ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
+	if (ret < 0) {
+		debug("Failed to write BURST_CAP: %d\n", ret);
+		return ret;
+	}
+
+	ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
+	if (ret < 0) {
+		debug("Failed to read BURST_CAP: %d\n", ret);
+		return ret;
+	}
+	debug("Read Value from BURST_CAP after writing: 0x%08x\n", read_buf);
+
+	read_buf = DEFAULT_BULK_IN_DELAY;
+	ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf);
+	if (ret < 0) {
+		debug("ret = %d", ret);
+		return ret;
+	}
+
+	ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
+	if (ret < 0) {
+		debug("Failed to read BULK_IN_DLY: %d\n", ret);
+		return ret;
+	}
+	debug("Read Value from BULK_IN_DLY after writing: "
+			"0x%08x\n", read_buf);
+
+	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
+	if (ret < 0) {
+		debug("Failed to read HW_CFG: %d\n", ret);
+		return ret;
+	}
+	debug("Read Value from HW_CFG: 0x%08x\n", read_buf);
+
+#ifdef TURBO_MODE
+		read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
+#endif
+	read_buf &= ~HW_CFG_RXDOFF_;
+
+	/* set Rx data offset=2, Make IP header aligns on word boundary. */
+#define NET_IP_ALIGN 2
+	read_buf |= NET_IP_ALIGN << 9;
+
+	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
+	if (ret < 0) {
+		debug("Failed to write HW_CFG register, ret=%d\n", ret);
+		return ret;
+	}
+
+	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
+	if (ret < 0) {
+		debug("Failed to read HW_CFG: %d\n", ret);
+		return ret;
+	}
+	debug("Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
+
+	write_buf = 0xFFFFFFFF;
+	ret = smsc95xx_write_reg(dev, INT_STS, write_buf);
+	if (ret < 0) {
+		debug("Failed to write INT_STS register, ret=%d\n", ret);
+		return ret;
+	}
+
+	ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
+	if (ret < 0) {
+		debug("Failed to read ID_REV: %d\n", ret);
+		return ret;
+	}
+	debug("ID_REV = 0x%08x\n", read_buf);
+
+	/* Init Tx */
+	write_buf = 0;
+	ret = smsc95xx_write_reg(dev, FLOW, write_buf);
+	if (ret < 0) {
+		debug("Failed to write FLOW: %d\n", ret);
+		return ret;
+	}
+
+	read_buf = AFC_CFG_DEFAULT;
+	ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf);
+	if (ret < 0) {
+		debug("Failed to write AFC_CFG: %d\n", ret);
+		return ret;
+	}
+
+	ret = smsc95xx_read_reg(dev, MAC_CR, &dev->mac_cr);
+	if (ret < 0) {
+		debug("Failed to read MAC_CR: %d\n", ret);
+		return ret;
+	}
+
+	/* Init Rx. Set Vlan */
+	write_buf = (u32)ETH_P_8021Q;
+	ret = smsc95xx_write_reg(dev, VLAN1, write_buf);
+	if (ret < 0) {
+		debug("Failed to write VAN1: %d\n", ret);
+		return ret;
+	}
+
+	/* Disable checksum offload engines */
+	ret = smsc95xx_set_csums(dev, 0, 0);
+	if (ret < 0) {
+		debug("Failed to set csum offload: %d\n", ret);
+		return ret;
+	}
+	smsc95xx_set_multicast(dev);
+
+	if (smsc95xx_phy_initialize(dev) < 0)
+		return -1;
+	ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
+	if (ret < 0) {
+		debug("Failed to read INT_EP_CTL: %d", ret);
+		return ret;
+	}
+	/* enable PHY interrupts */
+	read_buf |= INT_EP_CTL_PHY_INT_;
+
+	ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
+	if (ret < 0) {
+		debug("Failed to write INT_EP_CTL: %d", ret);
+		return ret;
+	}
+
+	smsc95xx_start_tx_path(dev);
+	smsc95xx_start_rx_path(dev);
+
+	timeout = 0;
+	do {
+		link_detected = smsc95xx_mdio_read(dev, dev->phy_id, MII_BMSR)
+			& BMSR_LSTATUS;
+		if (!link_detected) {
+			if (timeout == 0)
+				printf("Waiting for Ethernet connection... ");
+			udelay(TIMEOUT_RESOLUTION * 1000);
+			timeout += TIMEOUT_RESOLUTION;
+		}
+	} while (!link_detected && timeout < PHY_CONNECT_TIMEOUT);
+	if (link_detected) {
+		if (timeout != 0)
+			printf("done.\n");
+	} else {
+		printf("unable to connect.\n");
+		return -1;
+	}
+	return 0;
+}
+
+static int smsc95xx_send(struct eth_device *eth, volatile void* packet,
+			 int length)
+{
+	struct ueth_data *dev = (struct ueth_data *)eth->priv;
+	int err;
+	int actual_len;
+	u32 tx_cmd_a;
+	u32 tx_cmd_b;
+	unsigned char msg[PKTSIZE + sizeof(tx_cmd_a) + sizeof(tx_cmd_b)];
+
+	debug("** %s(), len %d, buf %#x\n", __func__, length, (int)msg);
+	if (length > PKTSIZE)
+		return -1;
+
+	tx_cmd_a = (u32)length | TX_CMD_A_FIRST_SEG_ | TX_CMD_A_LAST_SEG_;
+	tx_cmd_b = (u32)length;
+	cpu_to_le32s(&tx_cmd_a);
+	cpu_to_le32s(&tx_cmd_b);
+
+	/* prepend cmd_a and cmd_b */
+	memcpy(msg, &tx_cmd_a, sizeof(tx_cmd_a));
+	memcpy(msg + sizeof(tx_cmd_a), &tx_cmd_b, sizeof(tx_cmd_b));
+	memcpy(msg + sizeof(tx_cmd_a) + sizeof(tx_cmd_b), (void *)packet,
+	       length);
+	err = usb_bulk_msg(dev->pusb_dev,
+				usb_sndbulkpipe(dev->pusb_dev, dev->ep_out),
+				(void *)msg,
+				length + sizeof(tx_cmd_a) + sizeof(tx_cmd_b),
+				&actual_len,
+				USB_BULK_SEND_TIMEOUT);
+	debug("Tx: len = %u, actual = %u, err = %d\n",
+	      length + sizeof(tx_cmd_a) + sizeof(tx_cmd_b),
+	      actual_len, err);
+	return err;
+}
+
+static int smsc95xx_recv(struct eth_device *eth)
+{
+	struct ueth_data *dev = (struct ueth_data *)eth->priv;
+	static unsigned char  recv_buf[AX_RX_URB_SIZE];
+	unsigned char *buf_ptr;
+	int err;
+	int actual_len;
+	u32 packet_len;
+	int cur_buf_align;
+
+	debug("** %s()\n", __func__);
+	err = usb_bulk_msg(dev->pusb_dev,
+				usb_rcvbulkpipe(dev->pusb_dev, dev->ep_in),
+				(void *)recv_buf,
+				AX_RX_URB_SIZE,
+				&actual_len,
+				USB_BULK_RECV_TIMEOUT);
+	debug("Rx: len = %u, actual = %u, err = %d\n", AX_RX_URB_SIZE,
+	      actual_len, err);
+	if (err != 0) {
+		debug("Rx: failed to receive\n");
+		return -1;
+	}
+	if (actual_len > AX_RX_URB_SIZE) {
+		debug("Rx: received too many bytes %d\n", actual_len);
+		return -1;
+	}
+
+	buf_ptr = recv_buf;
+	while (actual_len > 0) {
+		/*
+		 * 1st 4 bytes contain the length of the actual data plus error
+		 * info. Extract data length.
+		 */
+		if (actual_len < sizeof(packet_len)) {
+			debug("Rx: incomplete packet length\n");
+			return -1;
+		}
+		memcpy(&packet_len, buf_ptr, sizeof(packet_len));
+		le32_to_cpus(&packet_len);
+		if (packet_len & RX_STS_ES_) {
+			debug("Rx: Error header=%#x", packet_len);
+			return -1;
+		}
+		packet_len = ((packet_len & RX_STS_FL_) >> 16);
+
+		if (packet_len > actual_len - sizeof(packet_len)) {
+			debug("Rx: too large packet: %d\n", packet_len);
+			return -1;
+		}
+
+		/* Notify net stack */
+		NetReceive(buf_ptr + sizeof(packet_len), packet_len - 4);
+
+		/* Adjust for next iteration */
+		actual_len -= sizeof(packet_len) + packet_len;
+		buf_ptr += sizeof(packet_len) + packet_len;
+		cur_buf_align = (int)buf_ptr - (int)recv_buf;
+
+		if (cur_buf_align & 0x03) {
+			int align = 4 - (cur_buf_align & 0x03);
+
+			actual_len -= align;
+			buf_ptr += align;
+		}
+	}
+	return err;
+}
+
+static void smsc95xx_halt(struct eth_device *eth)
+{
+	debug("** %s()\n", __func__);
+}
+
+/*
+ * SMSC probing functions
+ */
+void smsc95xx_eth_before_probe(void)
+{
+	curr_eth_dev = 0;
+}
+
+struct smsc95xx_dongle {
+	unsigned short vendor;
+	unsigned short product;
+};
+
+static const struct smsc95xx_dongle smsc95xx_dongles[] = {
+	{ 0x0424, 0xec00 },	/* LAN9512/LAN9514 Ethernet */
+	{ 0x0424, 0x9500 },	/* LAN9500 Ethernet */
+	{ 0x0000, 0x0000 }	/* END - Do not remove */
+};
+
+/* Probe to see if a new device is actually an SMSC device */
+int smsc95xx_eth_probe(struct usb_device *dev, unsigned int ifnum,
+		      struct ueth_data *ss)
+{
+	struct usb_interface *iface;
+	struct usb_interface_descriptor *iface_desc;
+	int i;
+
+	/* let's examine the device now */
+	iface = &dev->config.if_desc[ifnum];
+	iface_desc = &dev->config.if_desc[ifnum].desc;
+
+	for (i = 0; smsc95xx_dongles[i].vendor != 0; i++) {
+		if (dev->descriptor.idVendor == smsc95xx_dongles[i].vendor &&
+		    dev->descriptor.idProduct == smsc95xx_dongles[i].product)
+			/* Found a supported dongle */
+			break;
+	}
+	if (smsc95xx_dongles[i].vendor == 0)
+		return 0;
+
+	/* At this point, we know we've got a live one */
+	debug("\n\nUSB Ethernet device detected\n");
+	memset(ss, '\0', sizeof(struct ueth_data));
+
+	/* Initialize the ueth_data structure with some useful info */
+	ss->ifnum = ifnum;
+	ss->pusb_dev = dev;
+	ss->subclass = iface_desc->bInterfaceSubClass;
+	ss->protocol = iface_desc->bInterfaceProtocol;
+
+	/*
+	 * We are expecting a minimum of 3 endpoints - in, out (bulk), and int.
+	 * We will ignore any others.
+	 */
+	for (i = 0; i < iface_desc->bNumEndpoints; i++) {
+		/* is it an BULK endpoint? */
+		if ((iface->ep_desc[i].bmAttributes &
+		     USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
+			if (iface->ep_desc[i].bEndpointAddress & USB_DIR_IN)
+				ss->ep_in =
+					iface->ep_desc[i].bEndpointAddress &
+					USB_ENDPOINT_NUMBER_MASK;
+			else
+				ss->ep_out =
+					iface->ep_desc[i].bEndpointAddress &
+					USB_ENDPOINT_NUMBER_MASK;
+		}
+
+		/* is it an interrupt endpoint? */
+		if ((iface->ep_desc[i].bmAttributes &
+		    USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
+			ss->ep_int = iface->ep_desc[i].bEndpointAddress &
+				USB_ENDPOINT_NUMBER_MASK;
+			ss->irqinterval = iface->ep_desc[i].bInterval;
+		}
+	}
+	debug("Endpoints In %d Out %d Int %d\n",
+		  ss->ep_in, ss->ep_out, ss->ep_int);
+
+	/* Do some basic sanity checks, and bail if we find a problem */
+	if (usb_set_interface(dev, iface_desc->bInterfaceNumber, 0) ||
+	    !ss->ep_in || !ss->ep_out || !ss->ep_int) {
+		debug("Problems with device\n");
+		return 0;
+	}
+	dev->privptr = (void *)ss;
+	return 1;
+}
+
+int smsc95xx_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
+				struct eth_device *eth)
+{
+	debug("** %s()\n", __func__);
+	if (!eth) {
+		debug("%s: missing parameter.\n", __func__);
+		return 0;
+	}
+	sprintf(eth->name, "%s%d", SMSC95XX_BASE_NAME, curr_eth_dev++);
+	eth->init = smsc95xx_init;
+	eth->send = smsc95xx_send;
+	eth->recv = smsc95xx_recv;
+	eth->halt = smsc95xx_halt;
+	eth->priv = ss;
+	return 1;
+}
diff --git a/drivers/usb/eth/usb_ether.c b/drivers/usb/eth/usb_ether.c
index 68a0883..7b55da3 100644
--- a/drivers/usb/eth/usb_ether.c
+++ b/drivers/usb/eth/usb_ether.c
@@ -45,6 +45,13 @@ static const struct usb_eth_prob_dev prob_dev[] = {
 		.get_info = asix_eth_get_info,
 	},
 #endif
+#ifdef CONFIG_USB_ETHER_SMSC95XX
+	{
+		.before_probe = smsc95xx_eth_before_probe,
+		.probe = smsc95xx_eth_probe,
+		.get_info = smsc95xx_eth_get_info,
+	},
+#endif
 	{ },		/* END */
 };
 
diff --git a/include/usb_ether.h b/include/usb_ether.h
index 825c275..a7fb26b 100644
--- a/include/usb_ether.h
+++ b/include/usb_ether.h
@@ -51,6 +51,11 @@ struct ueth_data {
 	unsigned char	irqinterval;	/* Intervall for IRQ Pipe */
 
 	/* private fields for each driver can go here if needed */
+#ifdef CONFIG_USB_ETHER_SMSC95XX
+	size_t rx_urb_size;  /* maximum USB URB size */
+	u32 mac_cr;  /* MAC control register value */
+	int have_hwaddr;  /* 1 if we have a hardware MAC address */
+#endif
 };
 
 /*
@@ -65,4 +70,12 @@ int asix_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
 		      struct eth_device *eth);
 #endif
 
+#ifdef CONFIG_USB_ETHER_SMSC95XX
+void smsc95xx_eth_before_probe(void);
+int smsc95xx_eth_probe(struct usb_device *dev, unsigned int ifnum,
+			struct ueth_data *ss);
+int smsc95xx_eth_get_info(struct usb_device *dev, struct ueth_data *ss,
+			struct eth_device *eth);
+#endif
+
 #endif /* __USB_ETHER_H__ */
-- 
1.7.3.1

[U-Boot] [PATCH v4 2/5] Add Ethernet hardware MAC address framework to usbnet

[Simon Glass]

Built-in Ethernet adapters support setting the mac address by means of a
ethaddr environment variable for each interface (ethaddr, eth1addr, eth2addr).

This adds similar support to the USB network side, using the names
usbethaddr, usbeth1addr, etc. They are kept separate since we don't want
a USB device taking the MAC address of a built-in device or vice versa.

TEST=build, test on harmony, with setenv usbethaddr c0:c1:c0:13:0b:b8, bootp, tftp ...

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 board/davinci/common/misc.c |    2 +-
 drivers/net/designware.c    |    2 +-
 drivers/usb/eth/usb_ether.c |    9 ++++-
 include/net.h               |   25 ++++++++++++++++-
 net/eth.c                   |   65 ++++++++++++++++++++++++++----------------
 5 files changed, 73 insertions(+), 30 deletions(-)

diff --git a/board/davinci/common/misc.c b/board/davinci/common/misc.c
index 2bfdf23..b2b980b 100644
--- a/board/davinci/common/misc.c
+++ b/board/davinci/common/misc.c
@@ -101,7 +101,7 @@ void davinci_sync_env_enetaddr(uint8_t *rom_enetaddr)
 {
 	uint8_t env_enetaddr[6];
 
-	eth_getenv_enetaddr_by_index(0, env_enetaddr);
+	eth_getenv_enetaddr_by_index(NULL, 0, env_enetaddr);
 	if (!memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
 		/* There is no MAC address in the environment, so we initialize
 		 * it from the value in the EEPROM. */
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 3f5eeb7..5e0f9e3 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -500,7 +500,7 @@ int designware_initialize(u32 id, ulong base_addr, u32 phy_addr)
 	dev->iobase = (int)base_addr;
 	dev->priv = priv;
 
-	eth_getenv_enetaddr_by_index(id, &dev->enetaddr[0]);
+	eth_getenv_enetaddr_by_index(NULL, id, &dev->enetaddr[0]);
 
 	priv->dev = dev;
 	priv->mac_regs_p = (struct eth_mac_regs *)base_addr;
diff --git a/drivers/usb/eth/usb_ether.c b/drivers/usb/eth/usb_ether.c
index 7b55da3..6565ea5 100644
--- a/drivers/usb/eth/usb_ether.c
+++ b/drivers/usb/eth/usb_ether.c
@@ -80,6 +80,7 @@ int is_eth_dev_on_usb_host(void)
  */
 static void probe_valid_drivers(struct usb_device *dev)
 {
+	struct eth_device *eth;
 	int j;
 
 	for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) {
@@ -88,9 +89,10 @@ static void probe_valid_drivers(struct usb_device *dev)
 		/*
 		 * ok, it is a supported eth device. Get info and fill it in
 		 */
+		eth = &usb_eth[usb_max_eth_dev].eth_dev;
 		if (prob_dev[j].get_info(dev,
 			&usb_eth[usb_max_eth_dev],
-			&usb_eth[usb_max_eth_dev].eth_dev)) {
+			eth)) {
 			/* found proper driver */
 			/* register with networking stack */
 			usb_max_eth_dev++;
@@ -100,7 +102,10 @@ static void probe_valid_drivers(struct usb_device *dev)
 			 * call since eth_current_changed (internally called)
 			 * relies on it
 			 */
-			eth_register(&usb_eth[usb_max_eth_dev - 1].eth_dev);
+			eth_register(eth);
+			if (eth_write_hwaddr(eth, "usbeth",
+					usb_max_eth_dev - 1))
+				puts("Warning: failed to set MAC address\n");
 			break;
 			}
 		}
diff --git a/include/net.h b/include/net.h
index 95ef8ab..9256a46 100644
--- a/include/net.h
+++ b/include/net.h
@@ -123,7 +123,18 @@ extern int eth_get_dev_index (void);		/* get the device index */
 extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
 extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
 extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
-extern int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr);
+
+/*
+ * Get the hardware address for an ethernet interface .
+ * Args:
+ *	base_name - base name for device (NULL for "eth")
+ *	index - device index number (0 for first)
+ *	enetaddr - returns 6 byte hardware address
+ * Returns:
+ *	Return true if the address is valid.
+ */
+extern int eth_getenv_enetaddr_by_index(const char *base_name, int index,
+					uchar *enetaddr);
 
 extern int usb_eth_initialize(bd_t *bi);
 extern int eth_init(bd_t *bis);			/* Initialize the device */
@@ -136,6 +147,18 @@ extern int eth_rx(void);			/* Check for received packets */
 extern void eth_halt(void);			/* stop SCC */
 extern char *eth_get_name(void);		/* get name of current device */
 
+/*
+ * Set the hardware address for an ethernet interface based on 'eth%daddr'
+ * environment variable (or just 'ethaddr' if eth_number is 0).
+ * Args:
+ *	base_name - base name for device (NULL for "eth")
+ *	eth_number - value of %d (0 for first device of this type)
+ * Returns:
+ *	0 is success, non-zero is error status from driver.
+ */
+int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
+		     int eth_number);
+
 #ifdef CONFIG_MCAST_TFTP
 int eth_mcast_join( IPaddr_t mcast_addr, u8 join);
 u32 ether_crc (size_t len, unsigned char const *p);
diff --git a/net/eth.c b/net/eth.c
index 3a7ff50..51ffbee 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -53,10 +53,13 @@ int eth_setenv_enetaddr(char *name, const uchar *enetaddr)
 	return setenv(name, buf);
 }
 
-int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr)
+int eth_getenv_enetaddr_by_index(const char *base_name, int index,
+				 uchar *enetaddr)
 {
 	char enetvar[32];
-	sprintf(enetvar, index ? "eth%daddr" : "ethaddr", index);
+	sprintf(enetvar, index ? "%s%daddr" : "%saddr",
+		base_name ? base_name : "eth",
+		index);
 	return eth_getenv_enetaddr(enetvar, enetaddr);
 }
 
@@ -187,6 +190,37 @@ static void eth_current_changed(void)
 #endif
 }
 
+int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
+		   int eth_number)
+{
+	unsigned char env_enetaddr[6];
+	int ret = 0;
+
+	eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
+
+	if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
+		if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
+			memcmp(dev->enetaddr, env_enetaddr, 6)) {
+			printf("\nWarning: %s MAC addresses don't match:\n",
+				dev->name);
+			printf("Address in SROM is         %pM\n",
+				dev->enetaddr);
+			printf("Address in environment is  %pM\n",
+				env_enetaddr);
+		}
+
+		memcpy(dev->enetaddr, env_enetaddr, 6);
+	}
+
+	if (dev->write_hwaddr &&
+		!eth_mac_skip(eth_number) &&
+		is_valid_ether_addr(dev->enetaddr)) {
+		ret = dev->write_hwaddr(dev);
+	}
+
+	return ret;
+}
+
 int eth_register(struct eth_device *dev)
 {
 	struct eth_device *d;
@@ -207,7 +241,6 @@ int eth_register(struct eth_device *dev)
 
 int eth_initialize(bd_t *bis)
 {
-	unsigned char env_enetaddr[6];
 	int eth_number = 0;
 
 	eth_devices = NULL;
@@ -258,27 +291,8 @@ int eth_initialize(bd_t *bis)
 			if (strchr(dev->name, ' '))
 				puts("\nWarning: eth device name has a space!\n");
 
-			eth_getenv_enetaddr_by_index(eth_number, env_enetaddr);
-
-			if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
-				if (memcmp(dev->enetaddr, "\0\0\0\0\0\0", 6) &&
-				    memcmp(dev->enetaddr, env_enetaddr, 6))
-				{
-					printf ("\nWarning: %s MAC addresses don't match:\n",
-						dev->name);
-					printf ("Address in SROM is         %pM\n",
-						dev->enetaddr);
-					printf ("Address in environment is  %pM\n",
-						env_enetaddr);
-				}
-
-				memcpy(dev->enetaddr, env_enetaddr, 6);
-			}
-			if (dev->write_hwaddr &&
-				!eth_mac_skip(eth_number) &&
-				is_valid_ether_addr(dev->enetaddr)) {
-				dev->write_hwaddr(dev);
-			}
+			if (eth_write_hwaddr(dev, NULL, eth_number))
+				puts("Warning: failed to set MAC address\n");
 
 			eth_number++;
 			dev = dev->next;
@@ -353,7 +367,8 @@ int eth_init(bd_t *bis)
 	do {
 		uchar env_enetaddr[6];
 
-		if (eth_getenv_enetaddr_by_index(eth_number, env_enetaddr))
+		if (eth_getenv_enetaddr_by_index(NULL, eth_number,
+						 env_enetaddr))
 			memcpy(dev->enetaddr, env_enetaddr, 6);
 
 		++eth_number;
-- 
1.7.3.1

[U-Boot] [PATCH v4 3/5] Add documentation for USB Host Networking

[Simon Glass]

This describes what it is for, devices supported, how to enable for your
board in U-Boot, setting up the server, and notes about MAC addresses.

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 doc/README.usb |  164 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 163 insertions(+), 1 deletions(-)

diff --git a/doc/README.usb b/doc/README.usb
index 9aa4f62..d30e696 100644
--- a/doc/README.usb
+++ b/doc/README.usb
@@ -79,4 +79,166 @@ CONFIG_USB_UHCI	    defines the lowlevel part.A lowlevel part must be defined
 		    if using CONFIG_CMD_USB
 CONFIG_USB_KEYBOARD enables the USB Keyboard
 CONFIG_USB_STORAGE  enables the USB storage devices
-CONFIG_USB_HOST_ETHER	enables USB ethernet dongle support
+CONFIG_USB_HOST_ETHER	enables USB ethernet adapter support
+
+
+USB Host Networking
+===================
+
+If you have a supported USB Ethernet adapter you can use it in U-Boot
+to obtain an IP address and load a kernel from a network server.
+
+USB Host Networking is different from making your board act as a USB
+client. In that case your board is pretending to be an Ethernet adapter
+and will appear as a network interface to an attached computer. The
+connection is via a USB cable with the computer acting as the host.
+
+With USB Host Networking, your board is the USB host. It controls the
+Ethernet adapter to which it is directly connected and the connection to
+the outside world is your adapter's Ethernet cable. Your board becomes a
+first class network device, able to connect and perform network
+operations independently of your computer.
+
+
+Device support
+--------------
+
+Currently supported devices are listed in the drivers according to
+their vendor and product IDs. You can check your device by connecting it
+to a Linux machine and typing 'lsusb'. The drivers are in
+drivers/usb/eth.
+
+For example this lsusb output line shows a device with Vendor ID 0x0x95
+and product ID 0x7720:
+
+Bus 002 Device 010: ID 0b95:7720 ASIX Electronics Corp. AX88772
+
+If you look at drivers/usb/eth/asix.c you will see this line within the
+supported device list, so we know this adapter is supported.
+
+        { 0x0b95, 0x7720 },     /* Trendnet TU2-ET100 V3.0R */
+
+If your adapter is not listed there is a still a chance that it will
+work. Try looking up the manufacturer of the chip inside your adapter.
+or take the adapter apart and look for chip markings. Then add a line
+for your vendor/product ID into the table of the appropriate driver,
+build U-Boot and see if it works. If not then there might be differences
+between the chip in your adapter and the driver. You could try to get a
+datasheet for your device and add support for it to U-Boot. This is not
+particularly difficult - you only need to provide support for four basic
+functions: init, halt, send and recv.
+
+
+Enabling USB Host Networking
+----------------------------
+
+The normal U-Boot commands are used with USB networking, but you must
+start USB first. For example:
+
+usb start
+setenv bootfile /tftpboot/uImage
+setenv autoload y
+bootp
+
+
+(The autoload option makes bootp automatically load the boot file.)
+
+To enable USB Host Ethernet in U-Boot, your platform must of course
+support USB with CONFIG_CMD_USB enabled and working. You will need to
+add some config settings to your board header file:
+
+#define CONFIG_USB_HOST_ETHER   /* Enable USB Ethernet adapters */
+#define CONFIG_USB_ETHER_ASIX   /* Asix, or whatever driver(s) you want */
+
+You will also want to enable the network commands:
+
+#define CONFIG_CMD_NET
+#define CONFIG_NET_MULTI
+#define CONFIG_CMD_PING
+#define CONFIG_CMD_DHCP
+
+and some bootp options, which tell your board to obtain its subnet,
+gateway IP, host name and boot path from the bootp/dhcp server:
+
+#define CONFIG_BOOTP_SUBNETMASK
+#define CONFIG_BOOTP_GATEWAY
+#define CONFIG_BOOTP_HOSTNAME
+#define CONFIG_BOOTP_BOOTPATH
+
+You should also set the default IP address of your board and the server
+as well as the default file to load when a 'bootp' command is issued.
+
+#define CONFIG_IPADDR           10.0.0.2
+#define CONFIG_SERVERIP         10.0.0.1
+#define CONFIG_BOOTFILE         uImage
+
+
+The 'usb start' command should identify the adapter something like this:
+
+CrOS> usb start
+(Re)start USB...
+USB EHCI 1.00
+scanning bus for devices... 3 USB Device(s) found
+       scanning bus for storage devices... 0 Storage Device(s) found
+       scanning bus for ethernet devices... 1 Ethernet Device(s) found
+CrOS> print ethact
+ethact=asx0
+
+You can see that it found an ethernet device and we can print out the
+device name (asx0 in this case).
+
+Then 'bootp' should use it to obtain an IP address from DHCP, perhaps
+something like this:
+
+CrOS> bootp
+Waiting for Ethernet connection... done.
+BOOTP broadcast 1
+BOOTP broadcast 2
+DHCP client bound to address 172.22.73.81
+Using asx0 device
+TFTP from server 172.22.72.144; our IP address is 172.22.73.81
+Filename '/tftpboot/uImage-sjg-seaboard-261347'.
+Load address: 0x40c000
+Loading: #################################################################
+         #################################################################
+         #################################################################
+         ################################################
+done
+Bytes transferred = 3557464 (364858 hex)
+CrOS>
+
+
+MAC Addresses
+-------------
+
+Most Ethernet dongles have a built-in MAC address which is unique in the
+world. This is important so that devices on the network can be
+distinguised from each other. MAC address conflicts are evil and
+generally result in strange and eratic behaviour.
+
+Some boards have USB Ethernet chips on-board, and these sometimes do not
+have an assigned MAC address. In this case it is up to you to assign
+one which is unique. You should obtain a valid MAC address from a range
+assigned to you before you ship the product.
+
+Built-in Ethernet adapters support setting the MAC address by means of
+an ethaddr environment variable for each interface (ethaddr, eth1addr,
+eth2addr). There is similar support on the USB network side, using the
+names usbethaddr, usbeth1addr, etc. They are kept separate since we
+don't want a USB device taking the MAC address of a built-in device or
+vice versa.
+
+So if your USB Ethernet chip doesn't have a MAC address available then
+you must set usbethaddr to a suitable MAC address. At the time of
+writing this functionality is only supported by the SMSC driver.
+
+
+Server Setup
+------------
+
+For setting up the server side (dhcpd, tftpd, nfsd) you might find this
+Chromium OS page useful:
+
+http://www.chromium.org/network-based-development
+
+>>>>>>> 232452a... Add documentation for USB Host Networking
-- 
1.7.3.1

[U-Boot] [PATCH v4 4/5] Put common autoload code into auto_load() function

[Simon Glass]

This is a small clean-up patch.

TEST=Build U-Boot, try bootp and check it auto-loads.

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 net/bootp.c |   76 +++++++++++++++++++++++++---------------------------------
 1 files changed, 33 insertions(+), 43 deletions(-)

diff --git a/net/bootp.c b/net/bootp.c
index 1a71786..a3d0e63 100644
--- a/net/bootp.c
+++ b/net/bootp.c
@@ -137,6 +137,36 @@ static int truncate_sz (const char *name, int maxlen, int curlen)
 	return (curlen);
 }
 
+/*
+ * Check if autoload is enabled. If so, use either NFS or TFTP to download
+ * the boot file.
+ */
+static void auto_load(void)
+{
+	char *s = getenv("autoload");
+
+	if (s != NULL) {
+		if (*s == 'n') {
+			/*
+			 * Just use BOOTP to configure system;
+			 * Do not use TFTP to load the bootfile.
+			 */
+			NetState = NETLOOP_SUCCESS;
+			return;
+#if defined(CONFIG_CMD_NFS)
+		} else if (strcmp(s, "NFS") == 0) {
+			/*
+			 * Use NFS to load the bootfile.
+			 */
+			NfsStart();
+			return;
+#endif
+		}
+	}
+
+	TftpStart();
+}
+
 #if !defined(CONFIG_CMD_DHCP)
 
 static void BootpVendorFieldProcess (u8 * ext)
@@ -278,6 +308,7 @@ static void BootpVendorProcess (u8 * ext, int size)
 	if (NetBootFileSize)
 		debug("NetBootFileSize: %d\n", NetBootFileSize);
 }
+
 /*
  *	Handle a BOOTP received packet.
  */
@@ -285,7 +316,6 @@ static void
 BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
 {
 	Bootp_t *bp;
-	char	*s;
 
 	debug("got BOOTP packet (src=%d, dst=%d, len=%d want_len=%zu)\n",
 		src, dest, len, sizeof (Bootp_t));
@@ -312,26 +342,7 @@ BootpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
 
 	debug("Got good BOOTP\n");
 
-	if ((s = getenv("autoload")) != NULL) {
-		if (*s == 'n') {
-			/*
-			 * Just use BOOTP to configure system;
-			 * Do not use TFTP to load the bootfile.
-			 */
-			NetState = NETLOOP_SUCCESS;
-			return;
-#if defined(CONFIG_CMD_NFS)
-		} else if (strcmp(s, "NFS") == 0) {
-			/*
-			 * Use NFS to load the bootfile.
-			 */
-			NfsStart();
-			return;
-#endif
-		}
-	}
-
-	TftpStart();
+	auto_load();
 }
 #endif
 
@@ -904,34 +915,13 @@ DhcpHandler(uchar * pkt, unsigned dest, unsigned src, unsigned len)
 		debug("DHCP State: REQUESTING\n");
 
 		if ( DhcpMessageType((u8 *)bp->bp_vend) == DHCP_ACK ) {
-			char *s;
-
 			if (NetReadLong((ulong*)&bp->bp_vend[0]) == htonl(BOOTP_VENDOR_MAGIC))
 				DhcpOptionsProcess((u8 *)&bp->bp_vend[4], bp);
 			BootpCopyNetParams(bp); /* Store net params from reply */
 			dhcp_state = BOUND;
 			printf ("DHCP client bound to address %pI4\n", &NetOurIP);
 
-			/* Obey the 'autoload' setting */
-			if ((s = getenv("autoload")) != NULL) {
-				if (*s == 'n') {
-					/*
-					 * Just use BOOTP to configure system;
-					 * Do not use TFTP to load the bootfile.
-					 */
-					NetState = NETLOOP_SUCCESS;
-					return;
-#if defined(CONFIG_CMD_NFS)
-				} else if (strcmp(s, "NFS") == 0) {
-					/*
-					 * Use NFS to load the bootfile.
-					 */
-					NfsStart();
-					return;
-#endif
-				}
-			}
-			TftpStart();
+			auto_load();
 			return;
 		}
 		break;
-- 
1.7.3.1

[U-Boot] [PATCH v4 5/5] usbeth: asix: Do a fast init if link already established

[Simon Glass]

The Asix driver takes the link down during init() and then brings it back up.
This commit changes this so that if a link has already been established
successfully we simply check that the link is still good.

This reduces the delay between successive network commands.

TEST=bootp; tftp ...  - see that delay is now shorter than before.

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 drivers/usb/eth/asix.c |   36 +++++++++++++++++++++++-------------
 include/usb_ether.h    |    5 +++--
 2 files changed, 26 insertions(+), 15 deletions(-)

diff --git a/drivers/usb/eth/asix.c b/drivers/usb/eth/asix.c
index 9b012e4..18e5457 100644
--- a/drivers/usb/eth/asix.c
+++ b/drivers/usb/eth/asix.c
@@ -307,20 +307,12 @@ static int mii_nway_restart(struct ueth_data *dev)
 	return r;
 }
 
-/*
- * Asix callbacks
- */
-static int asix_init(struct eth_device *eth, bd_t *bd)
+static int full_init(struct eth_device *eth)
 {
+	struct ueth_data *dev = (struct ueth_data *)eth->priv;
 	int embd_phy;
 	unsigned char buf[ETH_ALEN];
 	u16 rx_ctl;
-	struct ueth_data	*dev = (struct ueth_data *)eth->priv;
-	int timeout = 0;
-#define TIMEOUT_RESOLUTION 50	/* ms */
-	int link_detected;
-
-	debug("** %s()\n", __func__);
 
 	if (asix_write_gpio(dev,
 			AX_GPIO_RSE | AX_GPIO_GPO_2 | AX_GPIO_GPO2EN, 5) < 0)
@@ -395,6 +387,25 @@ static int asix_init(struct eth_device *eth, bd_t *bd)
 
 	if (asix_write_rx_ctl(dev, AX_DEFAULT_RX_CTL) < 0)
 		goto out_err;
+	return 0;
+out_err:
+	return -1;
+}
+
+/*
+ * Asix callbacks
+ */
+static int asix_init(struct eth_device *eth, bd_t *bd)
+{
+	struct ueth_data *dev = (struct ueth_data *)eth->priv;
+	int timeout = 0;
+#define TIMEOUT_RESOLUTION 50	/* ms */
+	int link_detected;
+
+	debug("** %s()\n", __func__);
+
+	if (!dev->has_been_running && full_init(eth))
+		return -1;
 
 	do {
 		link_detected = asix_mdio_read(dev, dev->phy_id, MII_BMSR) &
@@ -411,12 +422,11 @@ static int asix_init(struct eth_device *eth, bd_t *bd)
 			printf("done.\n");
 	} else {
 		printf("unable to connect.\n");
-		goto out_err;
+		return -1;
 	}
 
+	dev->has_been_running = 1;
 	return 0;
-out_err:
-	return -1;
 }
 
 static int asix_send(struct eth_device *eth, volatile void *packet, int length)
diff --git a/include/usb_ether.h b/include/usb_ether.h
index a7fb26b..73b085d 100644
--- a/include/usb_ether.h
+++ b/include/usb_ether.h
@@ -37,8 +37,9 @@
 
 struct ueth_data {
 	/* eth info */
-	struct eth_device eth_dev;		/* used with eth_register */
-	int phy_id;						/* mii phy id */
+	struct eth_device eth_dev;	/* used with eth_register */
+	int phy_id;			/* mii phy id */
+	int has_been_running;		/* 1 if we have had a link up */
 
 	/* usb info */
 	struct usb_device *pusb_dev;	/* this usb_device */
-- 
1.7.3.1

[U-Boot] [PATCH v4 2/5] Add Ethernet hardware MAC address framework to usbnet

[Remy Bohmer]

Hi,

2011/4/14 Simon Glass <sjg@chromium.org>:
> Built-in Ethernet adapters support setting the mac address by means of a
> ethaddr environment variable for each interface (ethaddr, eth1addr, eth2addr).
>
> This adds similar support to the USB network side, using the names
> usbethaddr, usbeth1addr, etc. They are kept separate since we don't want
> a USB device taking the MAC address of a built-in device or vice versa.
>
> TEST=build, test on harmony, with setenv usbethaddr c0:c1:c0:13:0b:b8, bootp, tftp ...
>
> Signed-off-by: Simon Glass <sjg@chromium.org>
> ---
> ?board/davinci/common/misc.c | ? ?2 +-
> ?drivers/net/designware.c ? ?| ? ?2 +-
> ?drivers/usb/eth/usb_ether.c | ? ?9 ++++-
> ?include/net.h ? ? ? ? ? ? ? | ? 25 ++++++++++++++++-
> ?net/eth.c ? ? ? ? ? ? ? ? ? | ? 65 ++++++++++++++++++++++++++----------------

3 subsystems within 1 single patch (net + usb + davinci-boards). How
are we gonna deal with it?
Since the remainder of the series is USB tree related, I would suggest
to include it in the u-boot-usb tree, but then I need the Ack of Ben
and Sandeep.

Kind regards,

Remy

[U-Boot] [PATCH v4 1/5] Add support for SMSC95XX USB 2.0 10/100MBit Ethernet Adapter

[Wolfgang Denk]

Dear Simon Glass,

In message <1302748176-4324-1-git-send-email-sjg@chromium.org> you wrote:
> The SMSC95XX is a USB hub with a built-in Ethernet adapter. This adds support
> for this, using the USB host network framework.
> 
> TEST=usb start; bootp; tftp ...
> 
> Signed-off-by: Simon Glass <sjg@chromium.org>
...
> +#define TX_CMD_A_FIRST_SEG_		(0x00002000)
> +#define TX_CMD_A_LAST_SEG_		(0x00001000)
> +
> +/* Rx status word */
> +#define RX_STS_FL_			(0x3FFF0000)	/* Frame Length */
> +#define RX_STS_ES_			(0x00008000)	/* Error Summary */
...

Please drop the parens around all these constants.  Please fix
globally.

> +/* SCSRs */
> +#define ID_REV				(0x00)
> +
> +#define INT_STS				(0x08)
> +
> +#define TX_CFG				(0x10)
> +#define TX_CFG_ON_			(0x00000004)
> +
> +#define HW_CFG				(0x14)
> +#define HW_CFG_BIR_			(0x00001000)
> +#define HW_CFG_RXDOFF_			(0x00000600)
> +#define HW_CFG_MEF_			(0x00000020)
> +#define HW_CFG_BCE_			(0x00000002)
> +#define HW_CFG_LRST_			(0x00000008)
> +
> +#define PM_CTRL				(0x20)
> +#define PM_CTL_PHY_RST_			(0x00000010)
> +
> +#define AFC_CFG				(0x2C)
> +
> +/*
> + * Hi watermark = 15.5Kb (~10 mtu pkts)
> + * low watermark = 3k (~2 mtu pkts)
> + * backpressure duration = ~ 350us
> + * Apply FC on any frame.
> + */
> +#define AFC_CFG_DEFAULT			(0x00F830A1)
> +
> +#define E2P_CMD				(0x30)
> +#define E2P_CMD_BUSY_			(0x80000000)
> +#define E2P_CMD_READ_			(0x00000000)
> +#define E2P_CMD_TIMEOUT_		(0x00000400)
> +#define E2P_CMD_LOADED_			(0x00000200)
> +#define E2P_CMD_ADDR_			(0x000001FF)
> +
> +#define E2P_DATA			(0x34)
> +
> +#define BURST_CAP			(0x38)
> +
> +#define INT_EP_CTL			(0x68)
> +#define INT_EP_CTL_PHY_INT_		(0x00008000)
> +
> +#define BULK_IN_DLY			(0x6C)
> +
> +/* MAC CSRs */
> +#define MAC_CR				(0x100)
> +#define MAC_CR_MCPAS_			(0x00080000)
> +#define MAC_CR_PRMS_			(0x00040000)
> +#define MAC_CR_HPFILT_			(0x00002000)
> +#define MAC_CR_TXEN_			(0x00000008)
> +#define MAC_CR_RXEN_			(0x00000004)
> +
> +#define ADDRH				(0x104)
> +
> +#define ADDRL				(0x108)
> +
> +#define MII_ADDR			(0x114)
> +#define MII_WRITE_			(0x02)
> +#define MII_BUSY_			(0x01)
> +#define MII_READ_			(0x00) /* ~of MII Write bit */
> +
> +#define MII_DATA			(0x118)
> +
> +#define FLOW				(0x11C)
> +
> +#define VLAN1				(0x120)
> +
> +#define COE_CR				(0x130)
> +#define Tx_COE_EN_			(0x00010000)
> +#define Rx_COE_EN_			(0x00000001)
> +
> +/* Vendor-specific PHY Definitions */
> +#define PHY_INT_SRC			(29)
> +
> +#define PHY_INT_MASK			(30)
> +#define PHY_INT_MASK_ANEG_COMP_		((u16)0x0040)
> +#define PHY_INT_MASK_LINK_DOWN_		((u16)0x0010)
> +#define PHY_INT_MASK_DEFAULT_		(PHY_INT_MASK_ANEG_COMP_ | \
> +					 PHY_INT_MASK_LINK_DOWN_)
> +
> +/* USB Vendor Requests */
> +#define USB_VENDOR_REQUEST_WRITE_REGISTER	0xA0
...

> +	ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
> +	if (ret < 0) {
> +		debug("Failed to read HW_CFG: %d\n", ret);
> +		return ret;
> +	}
> +	debug("Read Value from HW_CFG : 0x%08x\n", read_buf);
> +
> +	read_buf |= HW_CFG_BIR_;
> +	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
> +	if (ret < 0) {
> +		debug("Failed to write HW_CFG_BIR_ bit in HW_CFG "
> +			"register, ret = %d\n", ret);
> +		return ret;
> +	}

You repeat these sequences of smsc95xx_read_reg() resp.
smsc95xx_write_reg() followed by the "if (ret < 0)" part about 20
times.

Please move the respective debug() message for the failure case into
the functions, and consider using a loop here instead.

> +	read_buf = DEFAULT_BULK_IN_DELAY;
> +	ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf);
> +	if (ret < 0) {
> +		debug("ret = %d", ret);
> +		return ret;
> +	}

Is it intentional to use the read_buf with a smsc95xx_write_reg()
call?

> +	ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
> +	if (ret < 0) {
> +		debug("Failed to write HW_CFG register, ret=%d\n", ret);
> +		return ret;
> +	}

Ditto here?

> +	ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf);
> +	if (ret < 0) {
> +		debug("Failed to write AFC_CFG: %d\n", ret);
> +		return ret;
> +	}

And here?

> +	ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
> +	if (ret < 0) {
> +		debug("Failed to read INT_EP_CTL: %d", ret);
> +		return ret;
> +	}

And here we have &read_buf while everywhere else we have read_buf
only?



Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"I like your game but we have to change the rules."

[U-Boot] [PATCH v4 2/5] Add Ethernet hardware MAC address framework to usbnet

[Wolfgang Denk]

Dear Simon Glass,

In message <1302748176-4324-2-git-send-email-sjg@chromium.org> you wrote:
> Built-in Ethernet adapters support setting the mac address by means of a
> ethaddr environment variable for each interface (ethaddr, eth1addr, eth2addr).
> 
> This adds similar support to the USB network side, using the names
> usbethaddr, usbeth1addr, etc. They are kept separate since we don't want
> a USB device taking the MAC address of a built-in device or vice versa.
> 
> TEST=build, test on harmony, with setenv usbethaddr c0:c1:c0:13:0b:b8, bootp, tftp ...
> 
> Signed-off-by: Simon Glass <sjg@chromium.org>
> ---
>  board/davinci/common/misc.c |    2 +-
>  drivers/net/designware.c    |    2 +-
>  drivers/usb/eth/usb_ether.c |    9 ++++-
>  include/net.h               |   25 ++++++++++++++++-
>  net/eth.c                   |   65 ++++++++++++++++++++++++++----------------
>  5 files changed, 73 insertions(+), 30 deletions(-)
...
> diff --git a/drivers/usb/eth/usb_ether.c b/drivers/usb/eth/usb_ether.c
> index 7b55da3..6565ea5 100644
> --- a/drivers/usb/eth/usb_ether.c
> +++ b/drivers/usb/eth/usb_ether.c
> @@ -80,6 +80,7 @@ int is_eth_dev_on_usb_host(void)
>   */
>  static void probe_valid_drivers(struct usb_device *dev)
>  {
> +	struct eth_device *eth;
>  	int j;
>  
>  	for (j = 0; prob_dev[j].probe && prob_dev[j].get_info; j++) {
> @@ -88,9 +89,10 @@ static void probe_valid_drivers(struct usb_device *dev)
>  		/*
>  		 * ok, it is a supported eth device. Get info and fill it in
>  		 */
> +		eth = &usb_eth[usb_max_eth_dev].eth_dev;

Index for eth is usb_max_eth_dev.

> @@ -100,7 +102,10 @@ static void probe_valid_drivers(struct usb_device *dev)
>  			 * call since eth_current_changed (internally called)
>  			 * relies on it
>  			 */
> -			eth_register(&usb_eth[usb_max_eth_dev - 1].eth_dev);
> +			eth_register(eth);

You change the behaviour here.  Please confirmt his is really
intentional.

> diff --git a/include/net.h b/include/net.h
> index 95ef8ab..9256a46 100644
> --- a/include/net.h
> +++ b/include/net.h
> @@ -123,7 +123,18 @@ extern int eth_get_dev_index (void);		/* get the device index */
>  extern void eth_parse_enetaddr(const char *addr, uchar *enetaddr);
>  extern int eth_getenv_enetaddr(char *name, uchar *enetaddr);
>  extern int eth_setenv_enetaddr(char *name, const uchar *enetaddr);
> -extern int eth_getenv_enetaddr_by_index(int index, uchar *enetaddr);
> +
> +/*
> + * Get the hardware address for an ethernet interface .
> + * Args:
> + *	base_name - base name for device (NULL for "eth")

This is an atitifical decision for the API which is difficult to
understand.  It just makes the code and understanding it more
difficult.  Just pass "eth" when you mean it.

> +int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
> +		   int eth_number)
> +{
> +	unsigned char env_enetaddr[6];
> +	int ret = 0;
> +
> +	eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);

Add error handling, or write

	(void)eth_getenv_enetaddr_by_index(...);

to indicate that you intentionally ignore the return value.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Philosophy is a game with objectives and no rules.
Mathematics is a game with rules and no objectives.

[U-Boot] [PATCH v4 2/5] Add Ethernet hardware MAC address framework to usbnet

[Wolfgang Denk]

Dear Remy Bohmer,

In message <BANLkTinCWW+B2bWJpWFQQU_dki0D50XEeg@mail.gmail.com> you wrote:
> 
> >  board/davinci/common/misc.c |    2 +-
> >  drivers/net/designware.c    |    2 +-
> >  drivers/usb/eth/usb_ether.c |    9 ++++-
> >  include/net.h               |   25 ++++++++++++++++-
> >  net/eth.c                   |   65 +++++++++++++++=
> +++++++++++----------------
> 
> 3 subsystems within 1 single patch (net + usb + davinci-boards). How
> are we gonna deal with it?
> Since the remainder of the series is USB tree related, I would suggest
> to include it in the u-boot-usb tree, but then I need the Ack of Ben
> and Sandeep.

I'm standing in for the network custodian as long as we haven't found
a better one.  I think it will be indeed the best to pull this though
your tree.  But I just requested some more changes.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
How many seconds are there in a year? If I tell you there are 3.155 x
10^7, you won't even try to remember it. On the other hand, who could
forget that, to within half a percent, pi seconds is a nanocentury.
                                                - Tom Duff, Bell Labs

[U-Boot] [PATCH v4 1/5] Add support for SMSC95XX USB 2.0 10/100MBit Ethernet Adapter

[Simon Glass]

On Mon, Apr 18, 2011 at 11:51 AM, Wolfgang Denk <wd@denx.de> wrote:
> Dear Simon Glass,
>
>> +/* Rx status word */
>> +#define RX_STS_FL_ ? ? ? ? ? ? ? ? ? (0x3FFF0000) ? ?/* Frame Length */
>> +#define RX_STS_ES_ ? ? ? ? ? ? ? ? ? (0x00008000) ? ?/* Error Summary */
> ...
>
> Please drop the parens around all these constants. ?Please fix
> globally.

Done


>> + ? ? ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
>> + ? ? if (ret < 0) {
>> + ? ? ? ? ? ? debug("Failed to write HW_CFG_BIR_ bit in HW_CFG "
>> + ? ? ? ? ? ? ? ? ? ? "register, ret = %d\n", ret);
>> + ? ? ? ? ? ? return ret;
>> + ? ? }
>
> You repeat these sequences of smsc95xx_read_reg() resp.
> smsc95xx_write_reg() followed by the "if (ret < 0)" part about 20
> times.
>
> Please move the respective debug() message for the failure case into
> the functions, and consider using a loop here instead.

I have moved the debug messages into the routines. Not sure what you
mean by a loop.

>
>> + ? ? read_buf = DEFAULT_BULK_IN_DELAY;
>> + ? ? ret = smsc95xx_write_reg(dev, BULK_IN_DLY, read_buf);
>> + ? ? if (ret < 0) {
>> + ? ? ? ? ? ? debug("ret = %d", ret);
>> + ? ? ? ? ? ? return ret;
>> + ? ? }
>
> Is it intentional to use the read_buf with a smsc95xx_write_reg()
> call?

It doesn't need to - I have changed it to use the value directly.

>> + ? ? ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
>> + ? ? if (ret < 0) {
>> + ? ? ? ? ? ? debug("Failed to write HW_CFG register, ret=%d\n", ret);
>> + ? ? ? ? ? ? return ret;
>> + ? ? }
>
> Ditto here?

This is updating a register. It reads the value, modifies it and writes it back.
>
>> + ? ? ret = smsc95xx_write_reg(dev, AFC_CFG, read_buf);
>> + ? ? if (ret < 0) {
>> + ? ? ? ? ? ? debug("Failed to write AFC_CFG: %d\n", ret);
>> + ? ? ? ? ? ? return ret;
>> + ? ? }
>
> And here?

Same as above.
>
>> + ? ? ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
>> + ? ? if (ret < 0) {
>> + ? ? ? ? ? ? debug("Failed to read INT_EP_CTL: %d", ret);
>> + ? ? ? ? ? ? return ret;
>> + ? ? }
>
> And here we have &read_buf while everywhere else we have read_buf
> only?

That's because it is reading the value here. The read routine needs an
address of a variable to put the value into.

>
>
>
> Best regards,
>
> Wolfgang Denk

Regards,
Simon

[U-Boot] [PATCH v4 2/5] Add Ethernet hardware MAC address framework to usbnet

[Simon Glass]

On Mon, Apr 18, 2011 at 12:04 PM, Wolfgang Denk <wd@denx.de> wrote:
> Dear Simon Glass,
>
> In message <1302748176-4324-2-git-send-email-sjg@chromium.org> you wrote:
>> @@ -88,9 +89,10 @@ static void probe_valid_drivers(struct usb_device *dev)
>> ? ? ? ? ? ? ? /*
>> ? ? ? ? ? ? ? ?* ok, it is a supported eth device. Get info and fill it in
>> ? ? ? ? ? ? ? ?*/
>> + ? ? ? ? ? ? eth = &usb_eth[usb_max_eth_dev].eth_dev;
>
> Index for eth is usb_max_eth_dev.
>
>> @@ -100,7 +102,10 @@ static void probe_valid_drivers(struct usb_device *dev)
>> ? ? ? ? ? ? ? ? ? ? ? ?* call since eth_current_changed (internally called)
>> ? ? ? ? ? ? ? ? ? ? ? ?* relies on it
>> ? ? ? ? ? ? ? ? ? ? ? ?*/
>> - ? ? ? ? ? ? ? ? ? ? eth_register(&usb_eth[usb_max_eth_dev - 1].eth_dev);
>> + ? ? ? ? ? ? ? ? ? ? eth_register(eth);
>
> You change the behaviour here. ?Please confirmt his is really
> intentional.

Yes. Since I am using an 'eth' pointer I don't need to index the array
again. The behaviour is the same as before.

>
>> diff --git a/include/net.h b/include/net.h

>> @@ -123,7 +123,18 @@ extern int eth_get_dev_index (void); ? ? ? ? ? ? /* get the device index */

>> +/*
>> + * Get the hardware address for an ethernet interface .
>> + * Args:
>> + * ? base_name - base name for device (NULL for "eth")
>
> This is an atitifical decision for the API which is difficult to
> understand. ?It just makes the code and understanding it more
> difficult. ?Just pass "eth" when you mean it.

The intention was to avoid everyone having to pass the correct value -
potential for error, etc. I could have created a #define, but decided
on this.

I have changed it as you request.

>
>> +int eth_write_hwaddr(struct eth_device *dev, const char *base_name,
>> + ? ? ? ? ? ? ? ?int eth_number)
>> +{
>> + ? ? unsigned char env_enetaddr[6];
>> + ? ? int ret = 0;
>> +
>> + ? ? eth_getenv_enetaddr_by_index(base_name, eth_number, env_enetaddr);
>
> Add error handling, or write
>
> ? ? ? ?(void)eth_getenv_enetaddr_by_index(...);
>
> to indicate that you intentionally ignore the return value.

Done

>
> Best regards,
>
> Wolfgang Denk

Regards,
Simon

[U-Boot] [PATCH v4 2/5] Add Ethernet hardware MAC address framework to usbnet

[Wolfgang Denk]

Dear Simon Glass,

In message <BANLkTikGucjpun2RhS2T2Nyq4_KB9gK8zw@mail.gmail.com> you wrote:
>
> >> +             eth = &usb_eth[usb_max_eth_dev].eth_dev;
> >
> > Index for eth is usb_max_eth_dev.
> >
> >> @@ -100,7 +102,10 @@ static void probe_valid_drivers(struct usb_device *> dev)
> >>                        * call since eth_current_> changed (internally called)
> >>                        * relies on it
> >>                        */
> >> -                     eth_register(&usb_eth[usb_max_eth_dev - 1].eth_dev);
> >> +                     eth_register(eth);
> >
> > You change the behaviour here.  Please confirmt his is really
> > intentional.
>
> Yes. Since I am using an 'eth' pointer I don't need to index the array
> again. The behaviour is the same as before.

No, it is not.  Before, we were accessing entry N-1 here. Now we use
entry N.  usb_max_eth_dev != usb_max_eth_dev - 1

> >> + *   base_name - base name for device (NULL for "eth")
> >
> > This is an atitifical decision for the API which is difficult to
> > understand.  It just makes the code and understanding it more
> > difficult.  Just pass "eth" when you mean it.
>
> The intention was to avoid everyone having to pass the correct value -
> potential for error, etc. I could have created a #define, but decided
> on this.

Ummm... but having everyone to pass the correct value is actually a
really good thing to have!


Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
When a child is taught ... its programmed with simple instructions --
and at some point, if its mind develops properly, it exceeds the  sum
of what it was taught, thinks independently.
	-- Dr. Richard Daystrom, "The Ultimate Computer",
	   stardate 4731.3.

[U-Boot] [PATCH v4 2/5] Add Ethernet hardware MAC address framework to usbnet

[Simon Glass]

On Thu, Apr 21, 2011 at 4:38 PM, Wolfgang Denk <wd@denx.de> wrote:
> Dear Simon Glass,
>
> In message <BANLkTikGucjpun2RhS2T2Nyq4_KB9gK8zw@mail.gmail.com> you wrote:
>>
>> >> + ? ? ? ? ? ? eth = &usb_eth[usb_max_eth_dev].eth_dev;
>> >
>> > Index for eth is usb_max_eth_dev.
>> >
>> >> @@ -100,7 +102,10 @@ static void probe_valid_drivers(struct usb_device *> dev)
>> >> ? ? ? ? ? ? ? ? ? ? ? ?* call since eth_current_> changed (internally called)
>> >> ? ? ? ? ? ? ? ? ? ? ? ?* relies on it
>> >> ? ? ? ? ? ? ? ? ? ? ? ?*/
>> >> - ? ? ? ? ? ? ? ? ? ? eth_register(&usb_eth[usb_max_eth_dev - 1].eth_dev);
>> >> + ? ? ? ? ? ? ? ? ? ? eth_register(eth);
>> >
>> > You change the behaviour here. ?Please confirmt his is really
>> > intentional.
>>
>> Yes. Since I am using an 'eth' pointer I don't need to index the array
>> again. The behaviour is the same as before.
>
> No, it is not. ?Before, we were accessing entry N-1 here. Now we use
> entry N. ?usb_max_eth_dev != usb_max_eth_dev - 1

Hi Wolfgang,

Hmmm. If you see the usb_max_eth_dev++ below, it is increasing the
index variable to keep eth_register() happy. I have kept that
behaviour.

So let's say usb_max_eth_dev is 3. The sequence is:

- set eth to point to item 3
- increase usb_max_eth_dev to 4 as required by eth_register()
- call eth_register() with item 3 (i.e. eth pointer hasn't changed)
- call eth_write_hwaddr with item 3

Maybe look at the whole code with my patch applied?

Let me know if I am missing something.

+                       eth)) {
                       /* found proper driver */
                       /* register with networking stack */
                       usb_max_eth_dev++;
@@ -100,7 +102,10 @@ static void probe_valid_drivers(struct usb_device *dev)
                        * call since eth_current_changed (internally called)
                        * relies on it
                        */
-                       eth_register(&usb_eth[usb_max_eth_dev - 1].eth_dev);
+                       eth_register(eth);
+                       if (eth_write_hwaddr(eth, "usbeth",
+                                       usb_max_eth_dev - 1))
+                               puts("Warning: failed to set MAC address\n");
                       break;
                       }

>
>> >> + * ? base_name - base name for device (NULL for "eth")
>> >
>> > This is an atitifical decision for the API which is difficult to
>> > understand. ?It just makes the code and understanding it more
>> > difficult. ?Just pass "eth" when you mean it.
>>
>> The intention was to avoid everyone having to pass the correct value -
>> potential for error, etc. I could have created a #define, but decided
>> on this.
>
> Ummm... but having everyone to pass the correct value is actually a
> really good thing to have!

OK fair enough, it is in there now.

Regards,
Simon

[U-Boot] [PATCH v4 2/5] Add Ethernet hardware MAC address framework to usbnet

[Simon Glass]

On Thu, Apr 21, 2011 at 6:52 PM, Simon Glass <sjg@chromium.org> wrote:

> On Thu, Apr 21, 2011 at 4:38 PM, Wolfgang Denk <wd@denx.de> wrote:
> > Dear Simon Glass,
> >
> > In message <BANLkTikGucjpun2RhS2T2Nyq4_KB9gK8zw@mail.gmail.com> you
> wrote:
> >>
> >> >> +             eth = &usb_eth[usb_max_eth_dev].eth_dev;
> >> >
> >> > Index for eth is usb_max_eth_dev.
> >> >
> >> >> @@ -100,7 +102,10 @@ static void probe_valid_drivers(struct
> usb_device *> dev)
> >> >>                        * call since eth_current_> changed (internally
> called)
> >> >>                        * relies on it
> >> >>                        */
> >> >> -                     eth_register(&usb_eth[usb_max_eth_dev -
> 1].eth_dev);
> >> >> +                     eth_register(eth);
> >> >
> >> > You change the behaviour here.  Please confirmt his is really
> >> > intentional.
> >>
> >> Yes. Since I am using an 'eth' pointer I don't need to index the array
> >> again. The behaviour is the same as before.
> >
> > No, it is not.  Before, we were accessing entry N-1 here. Now we use
> > entry N.  usb_max_eth_dev != usb_max_eth_dev - 1
>
> Hi Wolfgang,
>
> Hmmm. If you see the usb_max_eth_dev++ below, it is increasing the
> index variable to keep eth_register() happy. I have kept that
> behaviour.
>
> So let's say usb_max_eth_dev is 3. The sequence is:
>
> - set eth to point to item 3
> - increase usb_max_eth_dev to 4 as required by eth_register()
> - call eth_register() with item 3 (i.e. eth pointer hasn't changed)
> - call eth_write_hwaddr with item 3
>
> Maybe look at the whole code with my patch applied?
>
> Let me know if I am missing something.
>
>
Hi Wolfgang,

Please can you let me know where we stand with this patch? It is a bit
opaque and if you don't mind me reaching a bit further I might be able to
clean it up by changing eth_register().

Thanks,
Simon

[U-Boot] [PATCH v4 2/5] Add Ethernet hardware MAC address framework to usbnet

[Mike Frysinger]

On Thursday, April 21, 2011 19:38:06 Wolfgang Denk wrote:
> Simon Glass wrote:
> > >> + *   base_name - base name for device (NULL for "eth")
> > > 
> > > This is an atitifical decision for the API which is difficult to
> > > understand.  It just makes the code and understanding it more
> > > difficult.  Just pass "eth" when you mean it.
> > 
> > The intention was to avoid everyone having to pass the correct value -
> > potential for error, etc. I could have created a #define, but decided
> > on this.
> 
> Ummm... but having everyone to pass the correct value is actually a
> really good thing to have!

i'm not sure about that.  it just means it's easier for people to screw it up, 
or for duplicated code to propagate via copy & paste.  the current API Simon 
has makes sense to me.
-mike
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 836 bytes
Desc: This is a digitally signed message part.
Url : http://lists.denx.de/pipermail/u-boot/attachments/20110430/eaad9e12/attachment.pgp