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-rw-r--r--drivers/net/fec.c248
1 files changed, 180 insertions, 68 deletions
diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index cce32d43175f..2a71373719ae 100644
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -17,6 +17,8 @@
*
* Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be)
* Copyright (c) 2004-2006 Macq Electronique SA.
+ *
+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
*/
#include <linux/module.h>
@@ -45,29 +47,41 @@
#include <asm/cacheflush.h>
-#ifndef CONFIG_ARCH_MXC
+#ifndef CONFIG_ARM
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#endif
#include "fec.h"
-#ifdef CONFIG_ARCH_MXC
-#include <mach/hardware.h>
+#if defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28)
#define FEC_ALIGNMENT 0xf
#else
#define FEC_ALIGNMENT 0x3
#endif
-/*
- * Define the fixed address of the FEC hardware.
- */
-#if defined(CONFIG_M5272)
+#define DRIVER_NAME "fec"
+
+/* Controller is ENET-MAC */
+#define FEC_QUIRK_ENET_MAC (1 << 0)
+/* Controller needs driver to swap frame */
+#define FEC_QUIRK_SWAP_FRAME (1 << 1)
-static unsigned char fec_mac_default[] = {
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+static struct platform_device_id fec_devtype[] = {
+ {
+ .name = DRIVER_NAME,
+ .driver_data = 0,
+ }, {
+ .name = "imx28-fec",
+ .driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME,
+ }
};
+static unsigned char macaddr[ETH_ALEN];
+module_param_array(macaddr, byte, NULL, 0);
+MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
+
+#if defined(CONFIG_M5272)
/*
* Some hardware gets it MAC address out of local flash memory.
* if this is non-zero then assume it is the address to get MAC from.
@@ -133,7 +147,8 @@ static unsigned char fec_mac_default[] = {
* account when setting it.
*/
#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
- defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARCH_MXC)
+ defined(CONFIG_M520x) || defined(CONFIG_M532x) || \
+ defined(CONFIG_ARCH_MXC) || defined(CONFIG_SOC_IMX28)
#define OPT_FRAME_SIZE (PKT_MAXBUF_SIZE << 16)
#else
#define OPT_FRAME_SIZE 0
@@ -186,7 +201,6 @@ struct fec_enet_private {
int mii_timeout;
uint phy_speed;
phy_interface_t phy_interface;
- int index;
int link;
int full_duplex;
struct completion mdio_done;
@@ -213,10 +227,23 @@ static void fec_stop(struct net_device *dev);
/* Transmitter timeout */
#define TX_TIMEOUT (2 * HZ)
+static void *swap_buffer(void *bufaddr, int len)
+{
+ int i;
+ unsigned int *buf = bufaddr;
+
+ for (i = 0; i < (len + 3) / 4; i++, buf++)
+ *buf = cpu_to_be32(*buf);
+
+ return bufaddr;
+}
+
static netdev_tx_t
fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct fec_enet_private *fep = netdev_priv(dev);
+ const struct platform_device_id *id_entry =
+ platform_get_device_id(fep->pdev);
struct bufdesc *bdp;
void *bufaddr;
unsigned short status;
@@ -261,6 +288,14 @@ fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
bufaddr = fep->tx_bounce[index];
}
+ /*
+ * Some design made an incorrect assumption on endian mode of
+ * the system that it's running on. As the result, driver has to
+ * swap every frame going to and coming from the controller.
+ */
+ if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME)
+ swap_buffer(bufaddr, skb->len);
+
/* Save skb pointer */
fep->tx_skbuff[fep->skb_cur] = skb;
@@ -429,6 +464,8 @@ static void
fec_enet_rx(struct net_device *dev)
{
struct fec_enet_private *fep = netdev_priv(dev);
+ const struct platform_device_id *id_entry =
+ platform_get_device_id(fep->pdev);
struct bufdesc *bdp;
unsigned short status;
struct sk_buff *skb;
@@ -492,6 +529,9 @@ fec_enet_rx(struct net_device *dev)
dma_unmap_single(NULL, bdp->cbd_bufaddr, bdp->cbd_datlen,
DMA_FROM_DEVICE);
+ if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME)
+ swap_buffer(data, pkt_len);
+
/* This does 16 byte alignment, exactly what we need.
* The packet length includes FCS, but we don't want to
* include that when passing upstream as it messes up
@@ -538,37 +578,50 @@ rx_processing_done:
}
/* ------------------------------------------------------------------------- */
-#ifdef CONFIG_M5272
static void __inline__ fec_get_mac(struct net_device *dev)
{
struct fec_enet_private *fep = netdev_priv(dev);
+ struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
unsigned char *iap, tmpaddr[ETH_ALEN];
- if (FEC_FLASHMAC) {
- /*
- * Get MAC address from FLASH.
- * If it is all 1's or 0's, use the default.
- */
- iap = (unsigned char *)FEC_FLASHMAC;
- if ((iap[0] == 0) && (iap[1] == 0) && (iap[2] == 0) &&
- (iap[3] == 0) && (iap[4] == 0) && (iap[5] == 0))
- iap = fec_mac_default;
- if ((iap[0] == 0xff) && (iap[1] == 0xff) && (iap[2] == 0xff) &&
- (iap[3] == 0xff) && (iap[4] == 0xff) && (iap[5] == 0xff))
- iap = fec_mac_default;
- } else {
- *((unsigned long *) &tmpaddr[0]) = readl(fep->hwp + FEC_ADDR_LOW);
- *((unsigned short *) &tmpaddr[4]) = (readl(fep->hwp + FEC_ADDR_HIGH) >> 16);
+ /*
+ * try to get mac address in following order:
+ *
+ * 1) module parameter via kernel command line in form
+ * fec.macaddr=0x00,0x04,0x9f,0x01,0x30,0xe0
+ */
+ iap = macaddr;
+
+ /*
+ * 2) from flash or fuse (via platform data)
+ */
+ if (!is_valid_ether_addr(iap)) {
+#ifdef CONFIG_M5272
+ if (FEC_FLASHMAC)
+ iap = (unsigned char *)FEC_FLASHMAC;
+#else
+ if (pdata)
+ memcpy(iap, pdata->mac, ETH_ALEN);
+#endif
+ }
+
+ /*
+ * 3) FEC mac registers set by bootloader
+ */
+ if (!is_valid_ether_addr(iap)) {
+ *((unsigned long *) &tmpaddr[0]) =
+ be32_to_cpu(readl(fep->hwp + FEC_ADDR_LOW));
+ *((unsigned short *) &tmpaddr[4]) =
+ be16_to_cpu(readl(fep->hwp + FEC_ADDR_HIGH) >> 16);
iap = &tmpaddr[0];
}
memcpy(dev->dev_addr, iap, ETH_ALEN);
- /* Adjust MAC if using default MAC address */
- if (iap == fec_mac_default)
- dev->dev_addr[ETH_ALEN-1] = fec_mac_default[ETH_ALEN-1] + fep->index;
+ /* Adjust MAC if using macaddr */
+ if (iap == macaddr)
+ dev->dev_addr[ETH_ALEN-1] = macaddr[ETH_ALEN-1] + fep->pdev->id;
}
-#endif
/* ------------------------------------------------------------------------- */
@@ -651,8 +704,8 @@ static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
fep->mii_timeout = 0;
init_completion(&fep->mdio_done);
- /* start a read op */
- writel(FEC_MMFR_ST | FEC_MMFR_OP_READ |
+ /* start a write op */
+ writel(FEC_MMFR_ST | FEC_MMFR_OP_WRITE |
FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) |
FEC_MMFR_TA | FEC_MMFR_DATA(value),
fep->hwp + FEC_MII_DATA);
@@ -681,6 +734,7 @@ static int fec_enet_mii_probe(struct net_device *dev)
char mdio_bus_id[MII_BUS_ID_SIZE];
char phy_name[MII_BUS_ID_SIZE + 3];
int phy_id;
+ int dev_id = fep->pdev->id;
fep->phy_dev = NULL;
@@ -692,6 +746,8 @@ static int fec_enet_mii_probe(struct net_device *dev)
continue;
if (fep->mii_bus->phy_map[phy_id]->phy_id == 0)
continue;
+ if (dev_id--)
+ continue;
strncpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
break;
}
@@ -729,10 +785,35 @@ static int fec_enet_mii_probe(struct net_device *dev)
static int fec_enet_mii_init(struct platform_device *pdev)
{
+ static struct mii_bus *fec0_mii_bus;
struct net_device *dev = platform_get_drvdata(pdev);
struct fec_enet_private *fep = netdev_priv(dev);
+ const struct platform_device_id *id_entry =
+ platform_get_device_id(fep->pdev);
int err = -ENXIO, i;
+ /*
+ * The dual fec interfaces are not equivalent with enet-mac.
+ * Here are the differences:
+ *
+ * - fec0 supports MII & RMII modes while fec1 only supports RMII
+ * - fec0 acts as the 1588 time master while fec1 is slave
+ * - external phys can only be configured by fec0
+ *
+ * That is to say fec1 can not work independently. It only works
+ * when fec0 is working. The reason behind this design is that the
+ * second interface is added primarily for Switch mode.
+ *
+ * Because of the last point above, both phys are attached on fec0
+ * mdio interface in board design, and need to be configured by
+ * fec0 mii_bus.
+ */
+ if ((id_entry->driver_data & FEC_QUIRK_ENET_MAC) && pdev->id) {
+ /* fec1 uses fec0 mii_bus */
+ fep->mii_bus = fec0_mii_bus;
+ return 0;
+ }
+
fep->mii_timeout = 0;
/*
@@ -769,6 +850,10 @@ static int fec_enet_mii_init(struct platform_device *pdev)
if (mdiobus_register(fep->mii_bus))
goto err_out_free_mdio_irq;
+ /* save fec0 mii_bus */
+ if (id_entry->driver_data & FEC_QUIRK_ENET_MAC)
+ fec0_mii_bus = fep->mii_bus;
+
return 0;
err_out_free_mdio_irq:
@@ -1067,9 +1152,8 @@ static const struct net_device_ops fec_netdev_ops = {
/*
* XXX: We need to clean up on failure exits here.
*
- * index is only used in legacy code
*/
-static int fec_enet_init(struct net_device *dev, int index)
+static int fec_enet_init(struct net_device *dev)
{
struct fec_enet_private *fep = netdev_priv(dev);
struct bufdesc *cbd_base;
@@ -1086,26 +1170,11 @@ static int fec_enet_init(struct net_device *dev, int index)
spin_lock_init(&fep->hw_lock);
- fep->index = index;
fep->hwp = (void __iomem *)dev->base_addr;
fep->netdev = dev;
- /* Set the Ethernet address */
-#ifdef CONFIG_M5272
+ /* Get the Ethernet address */
fec_get_mac(dev);
-#else
- {
- unsigned long l;
- l = readl(fep->hwp + FEC_ADDR_LOW);
- dev->dev_addr[0] = (unsigned char)((l & 0xFF000000) >> 24);
- dev->dev_addr[1] = (unsigned char)((l & 0x00FF0000) >> 16);
- dev->dev_addr[2] = (unsigned char)((l & 0x0000FF00) >> 8);
- dev->dev_addr[3] = (unsigned char)((l & 0x000000FF) >> 0);
- l = readl(fep->hwp + FEC_ADDR_HIGH);
- dev->dev_addr[4] = (unsigned char)((l & 0xFF000000) >> 24);
- dev->dev_addr[5] = (unsigned char)((l & 0x00FF0000) >> 16);
- }
-#endif
/* Set receive and transmit descriptor base. */
fep->rx_bd_base = cbd_base;
@@ -1156,12 +1225,25 @@ static void
fec_restart(struct net_device *dev, int duplex)
{
struct fec_enet_private *fep = netdev_priv(dev);
+ const struct platform_device_id *id_entry =
+ platform_get_device_id(fep->pdev);
int i;
+ u32 val, temp_mac[2];
/* Whack a reset. We should wait for this. */
writel(1, fep->hwp + FEC_ECNTRL);
udelay(10);
+ /*
+ * enet-mac reset will reset mac address registers too,
+ * so need to reconfigure it.
+ */
+ if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) {
+ memcpy(&temp_mac, dev->dev_addr, ETH_ALEN);
+ writel(cpu_to_be32(temp_mac[0]), fep->hwp + FEC_ADDR_LOW);
+ writel(cpu_to_be32(temp_mac[1]), fep->hwp + FEC_ADDR_HIGH);
+ }
+
/* Clear any outstanding interrupt. */
writel(0xffc00000, fep->hwp + FEC_IEVENT);
@@ -1208,20 +1290,45 @@ fec_restart(struct net_device *dev, int duplex)
/* Set MII speed */
writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
-#ifdef FEC_MIIGSK_ENR
- if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) {
- /* disable the gasket and wait */
- writel(0, fep->hwp + FEC_MIIGSK_ENR);
- while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4)
- udelay(1);
+ /*
+ * The phy interface and speed need to get configured
+ * differently on enet-mac.
+ */
+ if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) {
+ val = readl(fep->hwp + FEC_R_CNTRL);
- /* configure the gasket: RMII, 50 MHz, no loopback, no echo */
- writel(1, fep->hwp + FEC_MIIGSK_CFGR);
+ /* MII or RMII */
+ if (fep->phy_interface == PHY_INTERFACE_MODE_RMII)
+ val |= (1 << 8);
+ else
+ val &= ~(1 << 8);
- /* re-enable the gasket */
- writel(2, fep->hwp + FEC_MIIGSK_ENR);
- }
+ /* 10M or 100M */
+ if (fep->phy_dev && fep->phy_dev->speed == SPEED_100)
+ val &= ~(1 << 9);
+ else
+ val |= (1 << 9);
+
+ writel(val, fep->hwp + FEC_R_CNTRL);
+ } else {
+#ifdef FEC_MIIGSK_ENR
+ if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) {
+ /* disable the gasket and wait */
+ writel(0, fep->hwp + FEC_MIIGSK_ENR);
+ while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4)
+ udelay(1);
+
+ /*
+ * configure the gasket:
+ * RMII, 50 MHz, no loopback, no echo
+ */
+ writel(1, fep->hwp + FEC_MIIGSK_CFGR);
+
+ /* re-enable the gasket */
+ writel(2, fep->hwp + FEC_MIIGSK_ENR);
+ }
#endif
+ }
/* And last, enable the transmit and receive processing */
writel(2, fep->hwp + FEC_ECNTRL);
@@ -1316,7 +1423,7 @@ fec_probe(struct platform_device *pdev)
}
clk_enable(fep->clk);
- ret = fec_enet_init(ndev, 0);
+ ret = fec_enet_init(ndev);
if (ret)
goto failed_init;
@@ -1380,8 +1487,10 @@ fec_suspend(struct device *dev)
if (ndev) {
fep = netdev_priv(ndev);
- if (netif_running(ndev))
- fec_enet_close(ndev);
+ if (netif_running(ndev)) {
+ fec_stop(ndev);
+ netif_device_detach(ndev);
+ }
clk_disable(fep->clk);
}
return 0;
@@ -1396,8 +1505,10 @@ fec_resume(struct device *dev)
if (ndev) {
fep = netdev_priv(ndev);
clk_enable(fep->clk);
- if (netif_running(ndev))
- fec_enet_open(ndev);
+ if (netif_running(ndev)) {
+ fec_restart(ndev, fep->full_duplex);
+ netif_device_attach(ndev);
+ }
}
return 0;
}
@@ -1414,12 +1525,13 @@ static const struct dev_pm_ops fec_pm_ops = {
static struct platform_driver fec_driver = {
.driver = {
- .name = "fec",
+ .name = DRIVER_NAME,
.owner = THIS_MODULE,
#ifdef CONFIG_PM
.pm = &fec_pm_ops,
#endif
},
+ .id_table = fec_devtype,
.probe = fec_probe,
.remove = __devexit_p(fec_drv_remove),
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.