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Date: Wed, 15 Sep 2010 10:11:24 -0400
From: Cyril Chemparathy <cyril@...com>
To: netdev@...r.kernel.org,
davinci-linux-open-source@...ux.davincidsp.com,
linux-omap@...r.kernel.org
Cc: michael.williamson@...ticallink.com, caglarakyuz@...il.com,
bparrot@...com, Cyril Chemparathy <cyril@...com>
Subject: [PATCH v4 04/10] net: davinci_emac: switch to new mdio
This patch switches the emac implementation over to the newly separated
MDIO driver.
With this, the mdio bus frequency defaults to a safe 2.2MHz. Boards may
optionally specify a bus frequency via platform data.
The phy identification scheme has been modified to use a phy bus id instead
of a mask. This largely serves to eliminate the "phy search" code in emac
init.
Signed-off-by: Cyril Chemparathy <cyril@...com>
Acked-by: David S. Miller <davem@...emloft.net>
Tested-by: Michael Williamson <michael.williamson@...ticallink.com>
Tested-by: Caglar Akyuz <caglarakyuz@...il.com>
---
drivers/net/Kconfig | 1 +
drivers/net/davinci_emac.c | 88 ++++++++++++++---------------------------
include/linux/davinci_emac.h | 9 ++++
3 files changed, 40 insertions(+), 58 deletions(-)
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index c5c86e0..911e7f1 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -951,6 +951,7 @@ config NET_NETX
config TI_DAVINCI_EMAC
tristate "TI DaVinci EMAC Support"
depends on ARM && ( ARCH_DAVINCI || ARCH_OMAP3 )
+ select TI_DAVINCI_MDIO
select PHYLIB
help
This driver supports TI's DaVinci Ethernet .
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 7fbd052..997f599 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -500,6 +500,7 @@ struct emac_priv {
u32 phy_mask;
/* mii_bus,phy members */
struct mii_bus *mii_bus;
+ const char *phy_id;
struct phy_device *phydev;
spinlock_t lock;
/*platform specific members*/
@@ -686,7 +687,7 @@ static int emac_get_settings(struct net_device *ndev,
struct ethtool_cmd *ecmd)
{
struct emac_priv *priv = netdev_priv(ndev);
- if (priv->phy_mask)
+ if (priv->phydev)
return phy_ethtool_gset(priv->phydev, ecmd);
else
return -EOPNOTSUPP;
@@ -704,7 +705,7 @@ static int emac_get_settings(struct net_device *ndev,
static int emac_set_settings(struct net_device *ndev, struct ethtool_cmd *ecmd)
{
struct emac_priv *priv = netdev_priv(ndev);
- if (priv->phy_mask)
+ if (priv->phydev)
return phy_ethtool_sset(priv->phydev, ecmd);
else
return -EOPNOTSUPP;
@@ -841,7 +842,7 @@ static void emac_update_phystatus(struct emac_priv *priv)
mac_control = emac_read(EMAC_MACCONTROL);
cur_duplex = (mac_control & EMAC_MACCONTROL_FULLDUPLEXEN) ?
DUPLEX_FULL : DUPLEX_HALF;
- if (priv->phy_mask)
+ if (priv->phydev)
new_duplex = priv->phydev->duplex;
else
new_duplex = DUPLEX_FULL;
@@ -2485,6 +2486,11 @@ static int emac_devioctl(struct net_device *ndev, struct ifreq *ifrq, int cmd)
return -EOPNOTSUPP;
}
+static int match_first_device(struct device *dev, void *data)
+{
+ return 1;
+}
+
/**
* emac_dev_open: EMAC device open
* @ndev: The DaVinci EMAC network adapter
@@ -2499,7 +2505,6 @@ static int emac_dev_open(struct net_device *ndev)
{
struct device *emac_dev = &ndev->dev;
u32 rc, cnt, ch;
- int phy_addr;
struct resource *res;
int q, m;
int i = 0;
@@ -2560,28 +2565,26 @@ static int emac_dev_open(struct net_device *ndev)
emac_set_coalesce(ndev, &coal);
}
- /* find the first phy */
priv->phydev = NULL;
- if (priv->phy_mask) {
- emac_mii_reset(priv->mii_bus);
- for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
- if (priv->mii_bus->phy_map[phy_addr]) {
- priv->phydev = priv->mii_bus->phy_map[phy_addr];
- break;
- }
- }
+ /* use the first phy on the bus if pdata did not give us a phy id */
+ if (!priv->phy_id) {
+ struct device *phy;
- if (!priv->phydev) {
- printk(KERN_ERR "%s: no PHY found\n", ndev->name);
- return -1;
- }
+ phy = bus_find_device(&mdio_bus_type, NULL, NULL,
+ match_first_device);
+ if (phy)
+ priv->phy_id = dev_name(phy);
+ }
- priv->phydev = phy_connect(ndev, dev_name(&priv->phydev->dev),
- &emac_adjust_link, 0, PHY_INTERFACE_MODE_MII);
+ if (priv->phy_id && *priv->phy_id) {
+ priv->phydev = phy_connect(ndev, priv->phy_id,
+ &emac_adjust_link, 0,
+ PHY_INTERFACE_MODE_MII);
if (IS_ERR(priv->phydev)) {
- printk(KERN_ERR "%s: Could not attach to PHY\n",
- ndev->name);
+ dev_err(emac_dev, "could not connect to phy %s\n",
+ priv->phy_id);
+ priv->phydev = NULL;
return PTR_ERR(priv->phydev);
}
@@ -2589,12 +2592,13 @@ static int emac_dev_open(struct net_device *ndev)
priv->speed = 0;
priv->duplex = ~0;
- printk(KERN_INFO "%s: attached PHY driver [%s] "
- "(mii_bus:phy_addr=%s, id=%x)\n", ndev->name,
+ dev_info(emac_dev, "attached PHY driver [%s] "
+ "(mii_bus:phy_addr=%s, id=%x)\n",
priv->phydev->drv->name, dev_name(&priv->phydev->dev),
priv->phydev->phy_id);
- } else{
+ } else {
/* No PHY , fix the link, speed and duplex settings */
+ dev_notice(emac_dev, "no phy, defaulting to 100/full\n");
priv->link = 1;
priv->speed = SPEED_100;
priv->duplex = DUPLEX_FULL;
@@ -2607,7 +2611,7 @@ static int emac_dev_open(struct net_device *ndev)
if (netif_msg_drv(priv))
dev_notice(emac_dev, "DaVinci EMAC: Opened %s\n", ndev->name);
- if (priv->phy_mask)
+ if (priv->phydev)
phy_start(priv->phydev);
return 0;
@@ -2794,7 +2798,7 @@ static int __devinit davinci_emac_probe(struct platform_device *pdev)
/* MAC addr and PHY mask , RMII enable info from platform_data */
memcpy(priv->mac_addr, pdata->mac_addr, 6);
- priv->phy_mask = pdata->phy_mask;
+ priv->phy_id = pdata->phy_id;
priv->rmii_en = pdata->rmii_en;
priv->version = pdata->version;
priv->int_enable = pdata->interrupt_enable;
@@ -2871,32 +2875,6 @@ static int __devinit davinci_emac_probe(struct platform_device *pdev)
}
- /* MII/Phy intialisation, mdio bus registration */
- emac_mii = mdiobus_alloc();
- if (emac_mii == NULL) {
- dev_err(emac_dev, "DaVinci EMAC: Error allocating mii_bus\n");
- rc = -ENOMEM;
- goto mdio_alloc_err;
- }
-
- priv->mii_bus = emac_mii;
- emac_mii->name = "emac-mii",
- emac_mii->read = emac_mii_read,
- emac_mii->write = emac_mii_write,
- emac_mii->reset = emac_mii_reset,
- emac_mii->irq = mii_irqs,
- emac_mii->phy_mask = ~(priv->phy_mask);
- emac_mii->parent = &pdev->dev;
- emac_mii->priv = priv->remap_addr + pdata->mdio_reg_offset;
- snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%x", priv->pdev->id);
- mdio_max_freq = pdata->mdio_max_freq;
- emac_mii->reset(emac_mii);
-
- /* Register the MII bus */
- rc = mdiobus_register(emac_mii);
- if (rc)
- goto mdiobus_quit;
-
if (netif_msg_probe(priv)) {
dev_notice(emac_dev, "DaVinci EMAC Probe found device "\
"(regs: %p, irq: %d)\n",
@@ -2904,11 +2882,7 @@ static int __devinit davinci_emac_probe(struct platform_device *pdev)
}
return 0;
-mdiobus_quit:
- mdiobus_free(emac_mii);
-
netdev_reg_err:
-mdio_alloc_err:
clk_disable(emac_clk);
no_irq_res:
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -2938,8 +2912,6 @@ static int __devexit davinci_emac_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- mdiobus_unregister(priv->mii_bus);
- mdiobus_free(priv->mii_bus);
release_mem_region(res->start, res->end - res->start + 1);
diff --git a/include/linux/davinci_emac.h b/include/linux/davinci_emac.h
index a04fd8c..46a759f 100644
--- a/include/linux/davinci_emac.h
+++ b/include/linux/davinci_emac.h
@@ -28,6 +28,15 @@ struct emac_platform_data {
u32 ctrl_ram_size;
u32 phy_mask;
u32 mdio_max_freq;
+
+ /*
+ * phy_id can be one of the following:
+ * - NULL : use the first phy on the bus,
+ * - "" : force to 100/full, no mdio control
+ * - "<bus>:<addr>" : use the specified bus and phy
+ */
+ const char *phy_id;
+
u8 rmii_en;
u8 version;
void (*interrupt_enable) (void);
--
1.7.0.4
--
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