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-rw-r--r--recipes/linux/linux-2.6.24/ts72xx/ep93xx-eth-phylib-framework.patch548
1 files changed, 548 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.24/ts72xx/ep93xx-eth-phylib-framework.patch b/recipes/linux/linux-2.6.24/ts72xx/ep93xx-eth-phylib-framework.patch
new file mode 100644
index 0000000000..3f25f308cd
--- /dev/null
+++ b/recipes/linux/linux-2.6.24/ts72xx/ep93xx-eth-phylib-framework.patch
@@ -0,0 +1,548 @@
+Currently, the ep93xx_eth driver doesn't care about the PHY state,
+but it should, in order to tell the MAC when full duplex operation is
+required; failure to do so causes degraded performance on full duplex
+links. This patch implements proper PHY handling via the phylib framework:
+
+ - clean up ep93xx_mdio_{read,write} to conform to ep93xx manual
+ - convert ep93xx_eth driver to phylib framework
+ - set full duplex bit in configuration of MAC when FDX link detected
+ - convert to use print_mac()
+
+Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>
+Cc: Lennert Buytenhek <buytenh@wantstofly.org>
+Cc: Andy Fleming <afleming@freescale.com>
+
+ drivers/net/arm/Kconfig | 1 +
+ drivers/net/arm/ep93xx_eth.c | 354 +++++++++++++++++++++++++++++++++---------
+ 2 files changed, 282 insertions(+), 73 deletions(-)
+
+diff --git a/drivers/net/arm/Kconfig b/drivers/net/arm/Kconfig
+index f9cc2b6..5860175 100644
+--- a/drivers/net/arm/Kconfig
++++ b/drivers/net/arm/Kconfig
+@@ -44,6 +44,7 @@ config EP93XX_ETH
+ tristate "EP93xx Ethernet support"
+ depends on ARM && ARCH_EP93XX
+ select MII
++ select PHYLIB
+ help
+ This is a driver for the ethernet hardware included in EP93xx CPUs.
+ Say Y if you are building a kernel for EP93xx based devices.
+diff --git a/drivers/net/arm/ep93xx_eth.c b/drivers/net/arm/ep93xx_eth.c
+index 91a6590..6b9ac41 100644
+--- a/drivers/net/arm/ep93xx_eth.c
++++ b/drivers/net/arm/ep93xx_eth.c
+@@ -2,6 +2,7 @@
+ * EP93xx ethernet network device driver
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ * Dedicated to Marija Kulikova.
++ * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
+ *
+ * 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
+@@ -14,6 +15,7 @@
+ #include <linux/kernel.h>
+ #include <linux/netdevice.h>
+ #include <linux/mii.h>
++#include <linux/phy.h>
+ #include <linux/etherdevice.h>
+ #include <linux/ethtool.h>
+ #include <linux/init.h>
+@@ -37,6 +39,8 @@
+ #define REG_RXCTL_DEFAULT 0x00073800
+ #define REG_TXCTL 0x0004
+ #define REG_TXCTL_ENABLE 0x00000001
++#define REG_TESTCTL 0x0008
++#define REG_TESTCTL_MFDX 0x00000040
+ #define REG_MIICMD 0x0010
+ #define REG_MIICMD_READ 0x00008000
+ #define REG_MIICMD_WRITE 0x00004000
+@@ -45,6 +49,9 @@
+ #define REG_MIISTS_BUSY 0x00000001
+ #define REG_SELFCTL 0x0020
+ #define REG_SELFCTL_RESET 0x00000001
++#define REG_SELFCTL_MDCDIV_MSK 0x00007e00
++#define REG_SELFCTL_MDCDIV_OFS 9
++#define REG_SELFCTL_PSPRS 0x00000100
+ #define REG_INTEN 0x0024
+ #define REG_INTEN_TX 0x00000008
+ #define REG_INTEN_RX 0x00000007
+@@ -174,8 +181,14 @@ struct ep93xx_priv
+
+ struct net_device_stats stats;
+
+- struct mii_if_info mii;
+ u8 mdc_divisor;
++ int phy_supports_mfps:1;
++
++ struct mii_bus mii_bus;
++ struct phy_device *phy_dev;
++ int speed;
++ int duplex;
++ int link;
+ };
+
+ #define rdb(ep, off) __raw_readb((ep)->base_addr + (off))
+@@ -185,8 +198,6 @@ struct ep93xx_priv
+ #define wrw(ep, off, val) __raw_writew((val), (ep)->base_addr + (off))
+ #define wrl(ep, off, val) __raw_writel((val), (ep)->base_addr + (off))
+
+-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg);
+-
+ static struct net_device_stats *ep93xx_get_stats(struct net_device *dev)
+ {
+ struct ep93xx_priv *ep = netdev_priv(dev);
+@@ -542,12 +553,6 @@ static int ep93xx_start_hw(struct net_device *dev)
+ return 1;
+ }
+
+- wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9));
+-
+- /* Does the PHY support preamble suppress? */
+- if ((ep93xx_mdio_read(dev, ep->mii.phy_id, MII_BMSR) & 0x0040) != 0)
+- wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9) | (1 << 8));
+-
+ /* Receive descriptor ring. */
+ addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rdesc);
+ wrl(ep, REG_RXDQBADD, addr);
+@@ -631,12 +636,11 @@ static int ep93xx_open(struct net_device *dev)
+ return -ENOMEM;
+
+ if (is_zero_ether_addr(dev->dev_addr)) {
++ DECLARE_MAC_BUF(mac_buf);
++
+ random_ether_addr(dev->dev_addr);
+- printk(KERN_INFO "%s: generated random MAC address "
+- "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x.\n", dev->name,
+- dev->dev_addr[0], dev->dev_addr[1],
+- dev->dev_addr[2], dev->dev_addr[3],
+- dev->dev_addr[4], dev->dev_addr[5]);
++ dev_info(&dev->dev, "generated random MAC address %s\n",
++ print_mac(mac_buf, dev->dev_addr));
+ }
+
+ napi_enable(&ep->napi);
+@@ -664,6 +668,8 @@ static int ep93xx_open(struct net_device *dev)
+
+ wrl(ep, REG_GIINTMSK, REG_GIINTMSK_ENABLE);
+
++ phy_start(ep->phy_dev);
++
+ netif_start_queue(dev);
+
+ return 0;
+@@ -676,6 +682,9 @@ static int ep93xx_close(struct net_device *dev)
+ napi_disable(&ep->napi);
+ netif_stop_queue(dev);
+
++ if (ep->phy_dev)
++ phy_stop(ep->phy_dev);
++
+ wrl(ep, REG_GIINTMSK, 0);
+ free_irq(ep->irq, dev);
+ ep93xx_stop_hw(dev);
+@@ -687,53 +696,103 @@ static int ep93xx_close(struct net_device *dev)
+ static int ep93xx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+ {
+ struct ep93xx_priv *ep = netdev_priv(dev);
+- struct mii_ioctl_data *data = if_mii(ifr);
+
+- return generic_mii_ioctl(&ep->mii, data, cmd, NULL);
++ return phy_mii_ioctl(ep->phy_dev, if_mii(ifr), cmd);
+ }
+
+-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
++/* common MII transactions should take < 100 iterations */
++#define EP93XX_PHY_TIMEOUT 2000
++
++static int ep93xx_mdio_wait(struct mii_bus *bus)
+ {
+- struct ep93xx_priv *ep = netdev_priv(dev);
+- int data;
+- int i;
++ struct ep93xx_priv *ep = bus->priv;
++ unsigned int timeout = EP93XX_PHY_TIMEOUT;
+
+- wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
++ while ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY)
++ && timeout--)
++ cpu_relax();
+
+- for (i = 0; i < 10; i++) {
+- if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+- break;
+- msleep(1);
++ if (timeout <= 0) {
++ dev_err(bus->dev, "MII operation timed out\n");
++ return -ETIMEDOUT;
+ }
+
+- if (i == 10) {
+- printk(KERN_INFO DRV_MODULE_NAME ": mdio read timed out\n");
+- data = 0xffff;
+- } else {
+- data = rdl(ep, REG_MIIDATA);
+- }
++ return 0;
++}
++
++
++static int ep93xx_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
++{
++ struct ep93xx_priv *ep = bus->priv;
++ u32 selfctl;
++ u32 data;
++
++ if (ep93xx_mdio_wait(bus) < 0)
++ return -ETIMEDOUT;
++
++ selfctl = rdl(ep, REG_SELFCTL);
++
++ if (ep->phy_supports_mfps)
++ wrl(ep, REG_SELFCTL, selfctl | REG_SELFCTL_PSPRS);
++ else
++ wrl(ep, REG_SELFCTL, selfctl & ~REG_SELFCTL_PSPRS);
++
++ wrl(ep, REG_MIICMD, REG_MIICMD_READ | (mii_id << 5) | regnum);
++
++ if (ep93xx_mdio_wait(bus) < 0)
++ return -ETIMEDOUT;
++
++ data = rdl(ep, REG_MIIDATA);
++
++ wrl(ep, REG_SELFCTL, selfctl);
+
+ return data;
+ }
+
+-static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
++static int ep93xx_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
++ u16 value)
+ {
+- struct ep93xx_priv *ep = netdev_priv(dev);
+- int i;
++ struct ep93xx_priv *ep = bus->priv;
++ u32 selfctl;
+
+- wrl(ep, REG_MIIDATA, data);
+- wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
++ if (ep93xx_mdio_wait(bus) < 0)
++ return -ETIMEDOUT;
+
+- for (i = 0; i < 10; i++) {
+- if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+- break;
+- msleep(1);
+- }
++ selfctl = rdl(ep, REG_SELFCTL);
+
+- if (i == 10)
+- printk(KERN_INFO DRV_MODULE_NAME ": mdio write timed out\n");
++ if (ep->phy_supports_mfps)
++ wrl(ep, REG_SELFCTL, selfctl | REG_SELFCTL_PSPRS);
++ else
++ wrl(ep, REG_SELFCTL, selfctl & ~REG_SELFCTL_PSPRS);
++
++ wrl(ep, REG_MIIDATA, value);
++ wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (mii_id << 5) | regnum);
++
++ if (ep93xx_mdio_wait(bus) < 0)
++ return -ETIMEDOUT;
++
++ wrl(ep, REG_SELFCTL, selfctl);
++
++ return 0;
++}
++
++static int ep93xx_mdio_reset(struct mii_bus *bus)
++{
++ struct ep93xx_priv *ep = bus->priv;
++
++ u32 selfctl = rdl(ep, REG_SELFCTL);
++
++ selfctl &= ~(REG_SELFCTL_MDCDIV_MSK | REG_SELFCTL_PSPRS);
++
++ selfctl |= (ep->mdc_divisor - 1) << REG_SELFCTL_MDCDIV_OFS;
++ selfctl |= REG_SELFCTL_PSPRS;
++
++ wrl(ep, REG_SELFCTL, selfctl);
++
++ return 0;
+ }
+
++
+ static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+ {
+ strcpy(info->driver, DRV_MODULE_NAME);
+@@ -743,33 +802,30 @@ static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *i
+ static int ep93xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+ {
+ struct ep93xx_priv *ep = netdev_priv(dev);
+- return mii_ethtool_gset(&ep->mii, cmd);
++ struct phy_device *phydev = ep->phy_dev;
++
++ if (!phydev)
++ return -ENODEV;
++
++ return phy_ethtool_gset(phydev, cmd);
+ }
+
+ static int ep93xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+ {
+ struct ep93xx_priv *ep = netdev_priv(dev);
+- return mii_ethtool_sset(&ep->mii, cmd);
+-}
++ struct phy_device *phydev = ep->phy_dev;
+
+-static int ep93xx_nway_reset(struct net_device *dev)
+-{
+- struct ep93xx_priv *ep = netdev_priv(dev);
+- return mii_nway_restart(&ep->mii);
+-}
++ if (!phydev)
++ return -ENODEV;
+
+-static u32 ep93xx_get_link(struct net_device *dev)
+-{
+- struct ep93xx_priv *ep = netdev_priv(dev);
+- return mii_link_ok(&ep->mii);
++ return phy_ethtool_sset(phydev, cmd);
+ }
+
+ static struct ethtool_ops ep93xx_ethtool_ops = {
+ .get_drvinfo = ep93xx_get_drvinfo,
+ .get_settings = ep93xx_get_settings,
+ .set_settings = ep93xx_set_settings,
+- .nway_reset = ep93xx_nway_reset,
+- .get_link = ep93xx_get_link,
++ .get_link = ethtool_op_get_link,
+ };
+
+ struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
+@@ -824,15 +880,127 @@ static int ep93xx_eth_remove(struct platform_device *pdev)
+ return 0;
+ }
+
++static void ep93xx_adjust_link(struct net_device *dev)
++{
++ struct ep93xx_priv *ep = netdev_priv(dev);
++ struct phy_device *phydev = ep->phy_dev;
++
++ int status_change = 0;
++
++ if (phydev->link) {
++ if ((ep->speed != phydev->speed) ||
++ (ep->duplex != phydev->duplex)) {
++ /* speed and/or duplex state changed */
++ u32 testctl = rdl(ep, REG_TESTCTL);
++
++ if (DUPLEX_FULL == phydev->duplex)
++ testctl |= REG_TESTCTL_MFDX;
++ else
++ testctl &= ~(REG_TESTCTL_MFDX);
++
++ wrl(ep, REG_TESTCTL, testctl);
++
++ ep->speed = phydev->speed;
++ ep->duplex = phydev->duplex;
++ status_change = 1;
++ }
++ }
++
++ /* test for online/offline link transition */
++ if (phydev->link != ep->link) {
++ if (phydev->link) /* link went online */
++ netif_schedule(dev);
++ else { /* link went offline */
++ ep->speed = 0;
++ ep->duplex = -1;
++ }
++ ep->link = phydev->link;
++
++ status_change = 1;
++ }
++
++ if (status_change)
++ phy_print_status(phydev);
++}
++
++static int ep93xx_mii_probe(struct net_device *dev, int phy_addr)
++{
++ struct ep93xx_priv *ep = netdev_priv(dev);
++ struct phy_device *phydev = NULL;
++ int val;
++
++ if (phy_addr >= 0 && phy_addr < PHY_MAX_ADDR)
++ phydev = ep->mii_bus.phy_map[phy_addr];
++
++ if (!phydev) {
++ dev_info(&dev->dev,
++ "PHY not found at specified address,"
++ " trying autodetection\n");
++
++ /* find the first phy */
++ for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
++ if (ep->mii_bus.phy_map[phy_addr]) {
++ phydev = ep->mii_bus.phy_map[phy_addr];
++ break;
++ }
++ }
++ }
++
++ if (!phydev) {
++ dev_err(&dev->dev, "no PHY found\n");
++ return -ENODEV;
++ }
++
++ phydev = phy_connect(dev, phydev->dev.bus_id,
++ ep93xx_adjust_link, 0, PHY_INTERFACE_MODE_MII);
++
++ if (IS_ERR(phydev)) {
++ dev_err(&dev->dev, "Could not attach to PHY\n");
++ return PTR_ERR(phydev);
++ }
++
++ ep->phy_supports_mfps = 0;
++
++ val = phy_read(phydev, MII_BMSR);
++ if (val < 0) {
++ dev_err(&phydev->dev, "failed to read MII register\n");
++ return val;
++ }
++
++ if (val & 0x0040) {
++ dev_info(&phydev->dev,
++ "PHY supports MII frame preamble suppression\n");
++ ep->phy_supports_mfps = 1;
++ }
++
++ phydev->supported &= PHY_BASIC_FEATURES;
++
++ phydev->advertising = phydev->supported;
++
++ ep->link = 0;
++ ep->speed = 0;
++ ep->duplex = -1;
++ ep->phy_dev = phydev;
++
++ dev_info(&dev->dev, "attached PHY driver [%s] "
++ "(mii_bus:phy_addr=%s, irq=%d)\n",
++ phydev->drv->name, phydev->dev.bus_id, phydev->irq);
++
++ return 0;
++}
++
++
+ static int ep93xx_eth_probe(struct platform_device *pdev)
+ {
+ struct ep93xx_eth_data *data;
+ struct net_device *dev;
+ struct ep93xx_priv *ep;
+- int err;
++ DECLARE_MAC_BUF(mac_buf);
++ int err, i;
+
+ if (pdev == NULL)
+ return -ENODEV;
++
+ data = pdev->dev.platform_data;
+
+ dev = ep93xx_dev_alloc(data);
+@@ -852,7 +1020,7 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
+ if (ep->res == NULL) {
+ dev_err(&pdev->dev, "Could not reserve memory region\n");
+ err = -ENOMEM;
+- goto err_out;
++ goto err_out_request_mem_region;
+ }
+
+ ep->base_addr = ioremap(pdev->resource[0].start,
+@@ -860,34 +1028,74 @@ static int ep93xx_eth_probe(struct platform_device *pdev)
+ if (ep->base_addr == NULL) {
+ dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
+ err = -EIO;
+- goto err_out;
++ goto err_out_ioremap;
+ }
+ ep->irq = pdev->resource[1].start;
+
+- ep->mii.phy_id = data->phy_id;
+- ep->mii.phy_id_mask = 0x1f;
+- ep->mii.reg_num_mask = 0x1f;
+- ep->mii.dev = dev;
+- ep->mii.mdio_read = ep93xx_mdio_read;
+- ep->mii.mdio_write = ep93xx_mdio_write;
++ /* mdio/mii bus */
++ ep->mii_bus.name = "ep93xx_mii_bus";
++ ep->mii_bus.id = 0;
++
++ ep->mii_bus.read = ep93xx_mdio_read;
++ ep->mii_bus.write = ep93xx_mdio_write;
++ ep->mii_bus.reset = ep93xx_mdio_reset;
++
++ ep->mii_bus.phy_mask = 0;
++
++ ep->mii_bus.priv = ep;
++ ep->mii_bus.dev = &dev->dev;
++
++ ep->mii_bus.irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
++ if (NULL == ep->mii_bus.irq) {
++ dev_err(&pdev->dev, "Could not allocate memory\n");
++ err = -ENOMEM;
++ goto err_out_mii_bus_irq_kmalloc;
++ }
++
++ for (i = 0; i < PHY_MAX_ADDR; i++)
++ ep->mii_bus.irq[i] = PHY_POLL;
++
+ ep->mdc_divisor = 40; /* Max HCLK 100 MHz, min MDIO clk 2.5 MHz. */
++ ep->phy_supports_mfps = 0; /* probe without preamble suppression */
+
+ err = register_netdev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to register netdev\n");
+- goto err_out;
++ goto err_out_register_netdev;
+ }
+
+- printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, "
+- "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x.\n", dev->name,
+- ep->irq, data->dev_addr[0], data->dev_addr[1],
+- data->dev_addr[2], data->dev_addr[3],
+- data->dev_addr[4], data->dev_addr[5]);
++ err = mdiobus_register(&ep->mii_bus);
++ if (err) {
++ dev_err(&dev->dev, "Could not register MII bus\n");
++ goto err_out_mdiobus_register;
++ }
++
++ err = ep93xx_mii_probe(dev, data->phy_id);
++ if (err) {
++ dev_err(&dev->dev, "failed to probe MII bus\n");
++ goto err_out_mii_probe;
++ }
++
++ dev_info(&dev->dev, "ep93xx on-chip ethernet, IRQ %d, %s\n",
++ ep->irq, print_mac(mac_buf, dev->dev_addr));
+
+ return 0;
+
++err_out_mii_probe:
++ mdiobus_unregister(&ep->mii_bus);
++err_out_mdiobus_register:
++ unregister_netdev(dev);
++err_out_register_netdev:
++ kfree(ep->mii_bus.irq);
++err_out_mii_bus_irq_kmalloc:
++ iounmap(ep->base_addr);
++err_out_ioremap:
++ release_resource(ep->res);
++ kfree(ep->res);
++err_out_request_mem_region:
++ free_netdev(dev);
+ err_out:
+- ep93xx_eth_remove(pdev);
++
+ return err;
+ }
+
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-07 15:44:45 +0000