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Diffstat (limited to 'drivers/net/bfin_mac.c')
-rw-r--r--drivers/net/bfin_mac.c107
1 files changed, 69 insertions, 38 deletions
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index eb971755a3ff..c993a32b3f50 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -1,34 +1,11 @@
/*
- * File: drivers/net/bfin_mac.c
- * Based on:
- * Maintainer:
- * Bryan Wu <bryan.wu@analog.com>
+ * Blackfin On-Chip MAC Driver
*
- * Original author:
- * Luke Yang <luke.yang@analog.com>
+ * Copyright 2004-2007 Analog Devices Inc.
*
- * Created:
- * Description:
+ * Enter bugs at http://blackfin.uclinux.org/
*
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.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
- * the Free Software Foundation ; either version 2, 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 ; see the file COPYING.
- * If not, write to the Free Software Foundation,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * Licensed under the GPL-2 or later.
*/
#include <linux/init.h>
@@ -65,7 +42,7 @@
#define DRV_NAME "bfin_mac"
#define DRV_VERSION "1.1"
#define DRV_AUTHOR "Bryan Wu, Luke Yang"
-#define DRV_DESC "Blackfin BF53[67] on-chip Ethernet MAC driver"
+#define DRV_DESC "Blackfin BF53[67] BF527 on-chip Ethernet MAC driver"
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_LICENSE("GPL");
@@ -296,7 +273,7 @@ static void mdio_poll(void)
/* poll the STABUSY bit */
while ((bfin_read_EMAC_STAADD()) & STABUSY) {
- mdelay(10);
+ udelay(1);
if (timeout_cnt-- < 0) {
printk(KERN_ERR DRV_NAME
": wait MDC/MDIO transaction to complete timeout\n");
@@ -412,20 +389,26 @@ static void bf537_adjust_link(struct net_device *dev)
spin_unlock_irqrestore(&lp->lock, flags);
}
+/* MDC = 2.5 MHz */
+#define MDC_CLK 2500000
+
static int mii_probe(struct net_device *dev)
{
struct bf537mac_local *lp = netdev_priv(dev);
struct phy_device *phydev = NULL;
unsigned short sysctl;
int i;
+ u32 sclk, mdc_div;
/* Enable PHY output early */
if (!(bfin_read_VR_CTL() & PHYCLKOE))
bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
- /* MDC = 2.5 MHz */
+ sclk = get_sclk();
+ mdc_div = ((sclk / MDC_CLK) / 2) - 1;
+
sysctl = bfin_read_EMAC_SYSCTL();
- sysctl |= SET_MDCDIV(24);
+ sysctl = (sysctl & ~MDCDIV) | SET_MDCDIV(mdc_div);
bfin_write_EMAC_SYSCTL(sysctl);
/* search for connect PHY device */
@@ -477,8 +460,10 @@ static int mii_probe(struct net_device *dev)
lp->phydev = phydev;
printk(KERN_INFO "%s: attached PHY driver [%s] "
- "(mii_bus:phy_addr=%s, irq=%d)\n",
- DRV_NAME, phydev->drv->name, phydev->dev.bus_id, phydev->irq);
+ "(mii_bus:phy_addr=%s, irq=%d, mdc_clk=%dHz(mdc_div=%d)"
+ "@sclk=%dMHz)\n",
+ DRV_NAME, phydev->drv->name, phydev->dev.bus_id, phydev->irq,
+ MDC_CLK, mdc_div, sclk/1000000);
return 0;
}
@@ -551,7 +536,7 @@ static void adjust_tx_list(void)
*/
if (current_tx_ptr->next->next == tx_list_head) {
while (tx_list_head->status.status_word == 0) {
- mdelay(10);
+ mdelay(1);
if (tx_list_head->status.status_word != 0
|| !(bfin_read_DMA2_IRQ_STATUS() & 0x08)) {
goto adjust_head;
@@ -666,6 +651,12 @@ static void bf537mac_rx(struct net_device *dev)
current_rx_ptr->skb = new_skb;
current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2;
+ /* Invidate the data cache of skb->data range when it is write back
+ * cache. It will prevent overwritting the new data from DMA
+ */
+ blackfin_dcache_invalidate_range((unsigned long)new_skb->head,
+ (unsigned long)new_skb->end);
+
len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN);
skb_put(skb, len);
blackfin_dcache_invalidate_range((unsigned long)skb->head,
@@ -767,7 +758,7 @@ static void bf537mac_enable(void)
#if defined(CONFIG_BFIN_MAC_RMII)
opmode |= RMII; /* For Now only 100MBit are supported */
-#ifdef CONFIG_BF_REV_0_2
+#if (defined(CONFIG_BF537) || defined(CONFIG_BF536)) && CONFIG_BF_REV_0_2
opmode |= TE;
#endif
#endif
@@ -792,6 +783,39 @@ static void bf537mac_timeout(struct net_device *dev)
netif_wake_queue(dev);
}
+static void bf537mac_multicast_hash(struct net_device *dev)
+{
+ u32 emac_hashhi, emac_hashlo;
+ struct dev_mc_list *dmi = dev->mc_list;
+ char *addrs;
+ int i;
+ u32 crc;
+
+ emac_hashhi = emac_hashlo = 0;
+
+ for (i = 0; i < dev->mc_count; i++) {
+ addrs = dmi->dmi_addr;
+ dmi = dmi->next;
+
+ /* skip non-multicast addresses */
+ if (!(*addrs & 1))
+ continue;
+
+ crc = ether_crc(ETH_ALEN, addrs);
+ crc >>= 26;
+
+ if (crc & 0x20)
+ emac_hashhi |= 1 << (crc & 0x1f);
+ else
+ emac_hashlo |= 1 << (crc & 0x1f);
+ }
+
+ bfin_write_EMAC_HASHHI(emac_hashhi);
+ bfin_write_EMAC_HASHLO(emac_hashlo);
+
+ return;
+}
+
/*
* This routine will, depending on the values passed to it,
* either make it accept multicast packets, go into
@@ -807,11 +831,17 @@ static void bf537mac_set_multicast_list(struct net_device *dev)
sysctl = bfin_read_EMAC_OPMODE();
sysctl |= RAF;
bfin_write_EMAC_OPMODE(sysctl);
- } else if (dev->flags & IFF_ALLMULTI || dev->mc_count) {
+ } else if (dev->flags & IFF_ALLMULTI) {
/* accept all multicast */
sysctl = bfin_read_EMAC_OPMODE();
sysctl |= PAM;
bfin_write_EMAC_OPMODE(sysctl);
+ } else if (dev->mc_count) {
+ /* set up multicast hash table */
+ sysctl = bfin_read_EMAC_OPMODE();
+ sysctl |= HM;
+ bfin_write_EMAC_OPMODE(sysctl);
+ bf537mac_multicast_hash(dev);
} else {
/* clear promisc or multicast mode */
sysctl = bfin_read_EMAC_OPMODE();
@@ -860,10 +890,10 @@ static int bf537mac_open(struct net_device *dev)
return retval;
phy_start(lp->phydev);
+ phy_write(lp->phydev, MII_BMCR, BMCR_RESET);
setup_system_regs(dev);
bf537mac_disable();
bf537mac_enable();
-
pr_debug("hardware init finished\n");
netif_start_queue(dev);
netif_carrier_on(dev);
@@ -886,6 +916,7 @@ static int bf537mac_close(struct net_device *dev)
netif_carrier_off(dev);
phy_stop(lp->phydev);
+ phy_write(lp->phydev, MII_BMCR, BMCR_PDOWN);
/* clear everything */
bf537mac_shutdown(dev);
@@ -970,7 +1001,7 @@ static int __init bf537mac_probe(struct net_device *dev)
/* register irq handler */
if (request_irq
(IRQ_MAC_RX, bf537mac_interrupt, IRQF_DISABLED | IRQF_SHARED,
- "BFIN537_MAC_RX", dev)) {
+ "EMAC_RX", dev)) {
printk(KERN_WARNING DRV_NAME
": Unable to attach BlackFin MAC RX interrupt\n");
return -EBUSY;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.