[PATCH 03/16] add driver for C64x+ ethernet driver
From: Mark Salter
Date: Wed May 11 2011 - 17:08:16 EST
From: Aurelien Jacquiot <a-jacquiot@xxxxxx>
This patch adds a network driver to support the ethernet interface found on
several Texas Instruments C64X+ based System on Chips. In particular, this
driver has been tested on the TMS320C6455, TMS320C6457, TMS320C6472, and
TMS320C6474 parts.
Signed-off-by: Aurelien Jacquiot <a-jacquiot@xxxxxx>
Signed-off-by: Mark Salter <msalter@xxxxxxxxxx>
---
drivers/net/Kconfig | 8 +
drivers/net/Makefile | 2 +
drivers/net/c6x_gemac.c | 1582 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/net/c6x_gmdio.c | 514 +++++++++++++++
4 files changed, 2106 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/c6x_gemac.c
create mode 100644 drivers/net/c6x_gmdio.c
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index dc280bc..5eb46a1 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2910,6 +2910,14 @@ config BNA
<http://support.brocade.com>
+config TMS320C64X_GEMAC
+ tristate "TMS320C64X GEMAC Ethernet Driver Support"
+ depends on TMS320C64XPLUS
+ default n
+ help
+ This driver supports the C64X+ SoC family ethernet
+ interface.
+
source "drivers/net/sfc/Kconfig"
source "drivers/net/benet/Kconfig"
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 01b604a..d768fde 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -259,6 +259,8 @@ obj-$(CONFIG_MLX4_CORE) += mlx4/
obj-$(CONFIG_ENC28J60) += enc28j60.o
obj-$(CONFIG_ETHOC) += ethoc.o
obj-$(CONFIG_GRETH) += greth.o
+obj-$(CONFIG_TMS320C64X_GEMAC) += gemac.o
+gemac-objs := c6x_gemac.o c6x_gmdio.o
obj-$(CONFIG_XTENSA_XT2000_SONIC) += xtsonic.o
diff --git a/drivers/net/c6x_gemac.c b/drivers/net/c6x_gemac.c
new file mode 100644
index 0000000..40124df
--- /dev/null
+++ b/drivers/net/c6x_gemac.c
@@ -0,0 +1,1582 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2006, 2007, 2008, 2009, 2010 Texas Instruments Incorporated
+ * Authors: Nicolas Videau (nicolas.videau@xxxxxxxxxxxxxxxx)
+ * Aurelien Jacquiot (a-jacquiot@xxxxxx)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/gmdio.h>
+#include <asm/gemac.h>
+
+#undef EMAC_DEBUG
+
+#ifdef EMAC_DEBUG
+#define DPRINTK(fmt, args...) printk(KERN_DEBUG "GEMAC: [%s] " fmt, __func__, ## args)
+#define ASSERT(cond) if (!(cond)) DPRINTK("ASSERT %s FAILURE\n", # cond)
+#else
+#define ASSERT(cond)
+#define DPRINTK(fmt, args...)
+#endif
+
+static int emac_open(struct net_device *dev);
+static int emac_close(struct net_device *dev);
+static int emac_reset(struct net_device *dev, int reset_mode);
+static void emac_set_modes(struct net_device *dev);
+static void emac_fixup_modes(struct net_device *dev);
+static void emac_reset_filter(struct net_device *dev,
+ int channel,
+ int reset_mode);
+static void emac_set_filter(struct net_device *dev, int channel);
+static int emac_reconfigure_device(struct net_device *dev);
+
+#ifdef EMAC_TIMER_TICK_MDIO
+static struct timer_list emac_timer;
+#endif
+
+static struct emac_config config = { 0, { 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 } };
+
+static int emac_shared;
+static int emac_idx;
+
+inline long _hex_chartol(char c)
+{
+ if (c >= '0' && c <= '9')
+ return c - '0';
+ if (c >= 'A' && c <= 'F')
+ return c - 'A' + 10;
+ if (c >= 'a' && c <= 'f')
+ return c - 'a' + 10;
+
+ return -1;
+}
+
+static unsigned long _hex_strtoul(const char *str, const char **end)
+{
+ unsigned long ul = 0;
+ long ud;
+ while ((ud = _hex_chartol(*str)) >= 0) {
+ ul = (ul << 4) | ud;
+ str++;
+ }
+ *end = str;
+ return ul;
+}
+
+static int __init get_mac_addr_from_cmdline(char *str)
+{
+ const char *start = (const char *) str;
+ const char *end;
+ int count;
+
+ for (count = 0; count < 6; count++) {
+ config.enetaddr[count] = _hex_strtoul(start, &end);
+ if (end == start)
+ return 0;
+ if ((*end != ':') && (count != 5))
+ return 0;
+ start = end + 1;
+ }
+ return 1;
+}
+
+__setup("emac_addr=", get_mac_addr_from_cmdline);
+
+static int __init set_emac_shared(char *str)
+{
+ emac_shared = 1;
+ return 1;
+}
+
+__setup("emac_shared", set_emac_shared);
+
+/*
+ * Get the device statistic
+ */
+static struct net_device_stats *emac_get_stats(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ unsigned int reg;
+ unsigned int dummy;
+ int i;
+
+ emac_set_stat(dev->stats.multicast, EMAC_RXMCASTFRAMES);
+ emac_set_stat(dev->stats.collisions, EMAC_TXCOLLISION);
+ emac_set_stat(dev->stats.rx_length_errors, EMAC_RXOVERSIZED);
+ emac_set_stat(dev->stats.rx_length_errors, EMAC_RXUNDERSIZED);
+ emac_set_stat(dev->stats.rx_crc_errors, EMAC_RXCRCERRORS);
+ emac_set_stat(dev->stats.rx_frame_errors, EMAC_RXALIGNCODEERRORS);
+ emac_set_stat(dev->stats.tx_carrier_errors, EMAC_TXCARRIERSLOSS);
+ emac_set_stat(dev->stats.tx_fifo_errors, EMAC_TXUNDERRUN);
+ emac_set_stat(dev->stats.tx_window_errors, EMAC_TXLATECOLL);
+
+ /* ACK statistic by write-to-decrement */
+ reg = EMAC_RXGOODFRAMES;
+ for (i = 0; i < EMAC_NUM_STATREGS; i++) {
+ dummy = emac_get_reg(reg);
+ emac_set_reg(reg, dummy);
+ reg += 4;
+ }
+
+ return &dev->stats;
+}
+
+/*
+ * Receive packets
+ */
+static int emac_rx(struct net_device *dev, struct emac_desc *desc_ack)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ volatile struct emac_desc *desc = ep->cur_rx;
+ ushort pkt_len;
+ u32 pkt_flags = desc->packet_flags_len & 0xffff0000;
+ int loop = 1;
+ struct sk_buff *skb, *skb_old;
+
+ DPRINTK("%s: RX desc_ack = 0x%x, cur_rx = 0x%x, num = %d\n",
+ dev->name, desc_ack, desc, (desc_ack - desc));
+
+ if ((desc == desc_ack) && (desc->packet_flags_len == EMAC_DESC_FLAG_OWNER))
+ loop = 0;
+
+ while (loop) {
+ skb_old = ep->rx_skbuff[ep->skb_rx_dirty];
+
+ pkt_len = desc->packet_flags_len & EMAC_PACKET_LEN_MASK;
+ pkt_flags = desc->packet_flags_len & 0xffff0000;
+
+ skb = netdev_alloc_skb_ip_align(dev, ep->packet_mtu);
+ if (skb != NULL) {
+ /* Prepare old sk_buff */
+ skb_old->dev = dev;
+ skb_put(skb_old, pkt_len);
+
+ /* No coherency is assumed between EDMA and L2 cache */
+ L2_cache_block_invalidate((u32) desc->buff,
+ (u32) desc->buff + pkt_len);
+
+ skb_old->protocol = eth_type_trans(skb_old, dev);
+
+ /* Attach new sk_buff to RX ring */
+ desc->buff = (u8 *) skb->data;
+ ep->rx_skbuff[ep->skb_rx_dirty] = skb;
+
+ DPRINTK("%s: receiving packet of %d len, proto 0x%x\n",
+ dev->name, pkt_len, skb->protocol);
+
+ /* Give back old sk_buff */
+ netif_rx(skb_old);
+ dev->last_rx = jiffies;
+
+ /* Fill statistic */
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += pkt_len;
+ } else {
+ printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
+ dev->stats.rx_dropped++;
+ }
+
+ /* Update RX dirty */
+ if (ep->skb_rx_dirty >= RX_RING_MOD_MAX)
+ ep->skb_rx_dirty = 0;
+ else
+ ep->skb_rx_dirty = ep->skb_rx_dirty + 1;
+
+ /* Descriptor is now available */
+ desc->buff_offset_len = ep->packet_mtu;
+ desc->packet_flags_len = EMAC_DESC_FLAG_OWNER;
+
+ /* Check if it is the last descriptor which has been received */
+ if (desc == desc_ack)
+ loop = 0;
+
+ /* Loop in the ring */
+ desc = HW_TO_PTR(desc->next);
+ }
+ ep->cur_rx = (struct emac_desc *) desc;
+
+ /* Check if the receiver stopped */
+ if (pkt_flags & EMAC_DESC_FLAG_EOQ)
+ emac_set_reg(EMAC_RX0HDP + (IDX_TO_CHAN(emac_idx) << 2),
+ PTR_TO_HW((u32) ep->cur_rx));
+
+ return 0;
+}
+
+/*
+ * Transmit packets ACK
+ */
+static int emac_tx(struct net_device *dev, struct emac_desc *desc_ack)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ volatile struct emac_desc *desc = ep->dirty_tx;
+ int loop = 1;
+
+ while (loop) {
+ DPRINTK("%s: TX desc_ack = 0x%x, desc = 0x%x, num = %d\n",
+ dev->name, desc_ack, desc, (desc_ack - desc));
+
+ if (ep->tx_skbuff[ep->skb_tx_dirty] == NULL) {
+ printk(KERN_ERR "%s: SKB NULL desc =%p desc_ack =%p, skb_tx_dirty=%ld count=%ld\n",
+ dev->name, desc, desc_ack, ep->skb_tx_dirty, ep->count_tx);
+ break;
+ }
+
+ /* Free the skbuff associated to this packet */
+ dev_kfree_skb_irq(ep->tx_skbuff[ep->skb_tx_dirty]);
+
+ ep->tx_skbuff[ep->skb_tx_dirty] = NULL;
+ ep->skb_tx_dirty = (ep->skb_tx_dirty + 1) & TX_RING_MOD_MASK;
+ ep->count_tx--;
+
+ /* Check if it is the last acknowledged descriptor */
+ if (desc++ == desc_ack)
+ loop = 0;
+
+ /* Check end of the ring */
+ if (desc > ep->tx_desc_base + (TX_RING_SIZE - 1))
+ desc = ep->tx_desc_base;
+ }
+
+ if (netif_running(dev))
+ netif_wake_queue(dev);
+
+ /* Since we have freed up a buffer, the ring is no longer full */
+ if (ep->tx_full) {
+ ep->tx_full = 0;
+
+ DPRINTK("%s: wake up queue count_tx = %d cur_tx = 0x%x head_tx\n",
+ dev->name, ep->count_tx, ep->cur_tx, ep->head_tx);
+
+ if (netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ }
+
+ /* If this is the end of the queue */
+ if (desc_ack->packet_flags_len & EMAC_DESC_FLAG_EOQ) {
+
+ /* If there are some waiting packets, start the new queue */
+ if (ep->count_tx > 0)
+ emac_set_reg(EMAC_TX0HDP + (IDX_TO_CHAN(emac_idx) << 2),
+ PTR_TO_HW(ep->head_tx));
+
+ /* Set the new head */
+ ep->head_tx = ep->cur_tx;
+ }
+
+ /* Update dirty tx */
+ ep->dirty_tx = (struct emac_desc *) desc;
+
+ return NETDEV_TX_OK;
+}
+
+/*
+ * Transmit the content of a skbuff
+ */
+static int emac_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ volatile struct emac_desc *desc;
+ volatile struct emac_desc *prev_desc = NULL;
+ ushort pkt_len = skb->len;
+ unsigned long flags;
+
+ if (ep->tx_full) {
+ printk(KERN_WARNING "%s: tx queue full\n", dev->name);
+ dev->stats.tx_dropped++;
+ return NETDEV_TX_BUSY;
+ }
+
+ /* Pad short frame */
+ if (unlikely(pkt_len < ETH_ZLEN)) {
+ if (skb_padto(skb, ETH_ZLEN)) {
+ netif_wake_queue(dev);
+ return NETDEV_TX_OK;
+ }
+ pkt_len = ETH_ZLEN;
+ }
+
+ spin_lock_irqsave(&ep->lock, flags);
+
+ desc = ep->cur_tx;
+
+ /* Set buffer length and pointer */
+ desc->buff = skb->data;
+ desc->packet_flags_len = pkt_len;
+ desc->buff_offset_len = pkt_len;
+ desc->next = NULL; /* close the queue*/
+
+ /* No coherency is assumed between EDMA and L2 cache */
+ L2_cache_block_writeback((u32) skb->data,
+ (u32) skb->data + pkt_len);
+
+ DPRINTK("%s: sending packet of %d len, skb_cur = %x, buffer = 0x%x\n",
+ dev->name, pkt_len, ep->skb_cur, skb->data);
+
+ /* Save skb */
+ ep->tx_skbuff[ep->skb_cur] = skb;
+ ep->skb_cur = (ep->skb_cur + 1) & TX_RING_MOD_MASK;
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += pkt_len;
+ dev->trans_start = jiffies;
+
+ desc->packet_flags_len |= EMAC_DESC_FLAG_SOP
+ | EMAC_DESC_FLAG_EOP
+ | EMAC_DESC_FLAG_OWNER;
+
+ /* Get the previous element of the ring if we are not the head */
+ if (desc != ep->head_tx) {
+ if (desc == ep->tx_desc_base)
+ prev_desc = ep->tx_desc_base + (TX_RING_SIZE - 1);
+ else
+ prev_desc = desc - 1;
+
+ /* Link the buffer to the previous one in the list */
+ prev_desc->next = (struct emac_desc *) PTR_TO_HW(desc);
+ }
+
+ ep->count_tx++;
+
+ /* Update current pointer */
+ ep->cur_tx = (struct emac_desc *) desc + 1;
+
+ /* Check end of ring */
+ if (ep->cur_tx > ep->tx_desc_base + (TX_RING_SIZE - 1))
+ ep->cur_tx = ep->tx_desc_base;
+
+ /*
+ * If we are the new head and there is no descriptor to acknowledge, start
+ * the new head.
+ */
+ if ((desc == ep->head_tx) && (ep->count_tx == 1)) {
+ emac_set_reg(EMAC_TX0HDP + (IDX_TO_CHAN(emac_idx) << 2),
+ PTR_TO_HW(ep->head_tx));
+ ep->head_tx = ep->cur_tx; /* set the new head */
+ }
+
+ /* Check ring oll over: do not reach the not yet acknowledged packets */
+ if (ep->count_tx == TX_RING_SIZE) {
+ ep->tx_full = 1;
+
+ DPRINTK("%s: tx queue full count_tx = %d cur_tx = 0x%x head_tx\n",
+ dev->name, ep->count_tx, ep->cur_tx, ep->head_tx);
+
+ netif_stop_queue(dev);
+ }
+ spin_unlock_irqrestore(&ep->lock, flags);
+
+ return NETDEV_TX_OK;
+}
+
+static void emac_handle_host_interrupt(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ unsigned long status;
+
+ /* Handle host error */
+ status = emac_get_reg(EMAC_MACSTATUS);
+
+ /* Check if the problem occurs on our channel when we are slave */
+ if ((ep->slave)
+ && (((status & EMAC_M_RXERRCH) >> EMAC_S_RXERRCH) != IDX_TO_CHAN(emac_idx))
+ && (((status & EMAC_M_TXERRCH) >> EMAC_S_TXERRCH) != IDX_TO_CHAN(emac_idx)))
+ return;
+
+ if ((status & EMAC_M_RXERRCODE) == (EMAC_V_OWNERSHIP << EMAC_S_RXERRCODE)) {
+ printk(KERN_ERR "%s: EMAC rx ring full\n", dev->name);
+ dev->stats.rx_fifo_errors++;
+ } else
+ printk(KERN_ERR "%s: EMAC fatal host error 0x%lx\n",
+ dev->name, status);
+
+ DPRINTK(KERN_ERR "%s: Error head=%p desc=%p dirty=%p skb_tx_dirty=%ld count=%ld\n",
+ dev->name, ep->head_tx, ep->cur_tx,
+ ep->dirty_tx, ep->skb_tx_dirty, ep->count_tx);
+
+ if (!ep->slave) {
+ /* Reconfigure the device */
+ ep->fatal_error = 1;
+ emac_reconfigure_device(dev);
+ }
+}
+
+/*
+ * Receive EMAC interrupt management
+ */
+
+#ifdef EMAC_HAS_SEPARATE_RXTX_IRQS
+
+static irqreturn_t emac_rx_interrupt(int irq, void *netdev_id)
+{
+ struct net_device *dev = netdev_id;
+ struct emac_private *ep = netdev_priv(dev);
+ struct emac_desc *desc;
+ unsigned long irq_flags;
+
+ ectl_arch_rx_irq_enter(IDX_TO_CHAN(emac_idx));
+
+ irq_flags = emac_arch_get_int_vector();
+
+ if (irq_flags & EMAC_B_STATPEND)
+ (void) emac_get_stats(dev);
+
+ if (irq_flags & EMAC_B_HOSTPEND)
+ emac_handle_host_interrupt(dev);
+
+ if (emac_arch_get_pending_irq(irq_flags,
+ EMAC_B_RXPEND0,
+ IDX_TO_CHAN(emac_idx))) {
+
+ /* ACK the interrupt */
+ desc = (struct emac_desc *) emac_get_reg(EMAC_RX0INTACK
+ + (IDX_TO_CHAN(emac_idx) << 2));
+ emac_set_reg(EMAC_RX0INTACK + (IDX_TO_CHAN(emac_idx) << 2), desc);
+
+ /* Handle receive event */
+ emac_rx(netdev_id, HW_TO_PTR(desc));
+ }
+
+ ectl_arch_rx_irq_leave(IDX_TO_CHAN(emac_idx));
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * Transmit EMAC interrupt management
+ */
+static irqreturn_t emac_tx_interrupt(int irq, void *netdev_id)
+{
+ struct net_device *dev = netdev_id;
+ struct emac_private *ep = netdev_priv(dev);
+ struct emac_desc *desc;
+ unsigned long irq_flags;
+
+ ectl_arch_tx_irq_enter(IDX_TO_CHAN(emac_idx));
+
+ irq_flags = emac_arch_get_int_vector();
+
+ if (irq_flags & EMAC_B_STATPEND)
+ (void) emac_get_stats(dev);
+
+ if (irq_flags & EMAC_B_HOSTPEND)
+ emac_handle_host_interrupt(dev);
+
+ if (emac_arch_get_pending_irq(irq_flags,
+ EMAC_B_TXPEND0,
+ IDX_TO_CHAN(emac_idx))) {
+
+ /* ACK the interrupt */
+ desc = (struct emac_desc *) emac_get_reg(EMAC_TX0INTACK
+ + (IDX_TO_CHAN(emac_idx) << 2));
+ emac_set_reg(EMAC_TX0INTACK + (IDX_TO_CHAN(emac_idx) << 2), desc);
+
+ /* Handle transmit ACK event */
+ emac_tx(netdev_id, HW_TO_PTR(desc));
+ }
+
+ ectl_arch_tx_irq_leave(IDX_TO_CHAN(emac_idx));
+
+ return IRQ_HANDLED;
+}
+
+#else
+
+/*
+ * Main EMAC interrupt management
+ */
+static irqreturn_t emac_interrupt(int irq, void *netdev_id)
+{
+ struct net_device *dev = netdev_id;
+ struct emac_private *ep = netdev_priv(dev);
+ struct emac_desc *desc;
+ unsigned long irq_flags;
+
+ /* Disable EMAC/MDIO interrupts */
+ emac_clearbit_reg(EMAC_EWCTL, EMAC_B_INTEN);
+
+ irq_flags = emac_get_reg(EMAC_MACINVECTOR);
+
+ if (irq_flags & EMAC_B_STATPEND)
+ (void) emac_get_stats(dev);
+
+ if (irq_flags & EMAC_B_HOSTPEND) {
+ emac_handle_host_interrupt(dev);
+
+ /* EMAC/MDIO interrupts already enabled by emac_open() */
+ return IRQ_HANDLED;
+ }
+
+ if (irq_flags & EMAC_B_TXPEND0) {
+ /* ACK the interrupt */
+ desc = (struct emac_desc *) emac_get_reg(EMAC_TX0INTACK);
+ emac_set_reg(EMAC_TX0INTACK, desc);
+
+ /* Handle transmit ACK event */
+ emac_tx(netdev_id, desc);
+ }
+
+ if (irq_flags & EMAC_B_RXPEND0) {
+ /* ACK the interrupt */
+ desc = (struct emac_desc *) emac_get_reg(EMAC_RX0INTACK);
+ emac_set_reg(EMAC_RX0INTACK, desc);
+
+ /* Handle receive event */
+ emac_rx(netdev_id, desc);
+ }
+
+ /* Enable EMAC/MDIO interrupts */
+ emac_setbit_reg(EMAC_EWCTL, EMAC_B_INTEN);
+
+ return IRQ_HANDLED;
+}
+#endif
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * EMAC poll
+ */
+static void emac_poll(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ ectl_arch_disable_irq(IDX_TO_CHAN(emac_idx));
+
+#ifdef EMAC_HAS_SEPARATE_RXTX_IRQS
+ emac_tx_interrupt(dev->irq + 1, dev);
+ emac_rx_interrupt(dev->irq, dev);
+#else
+ emac_interrupt(dev->irq, dev);
+#endif
+
+ ectl_arch_enable_irq(IDX_TO_CHAN(emac_idx), !ep->slave);
+}
+#endif
+
+/*
+ * Register the MAC address
+ */
+
+static void emac_register_mac_addr(struct net_device *dev, int idx)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ u32 val;
+ int i;
+
+ /* Copy the config MAC address to the dev_addr */
+ for (i = 4; i >= 0; i--)
+ dev->dev_addr[i] = config.enetaddr[i];
+ /*
+ * Compute MAC addr low for all for the given EMAC instances if several.
+ * Each device consume n MAC addresses where n is the number cores.
+ * This value is for GEM0, this value + 2 is for GEM1, etc
+ * The number programmed in this field will be incremented by n * 2 from
+ * device to device
+ */
+ dev->dev_addr[5] = (config.enetaddr[5] +
+ (IDX_TO_MAC(idx)) + DEV_TO_MAC(dev->dev_id)) & 0xff;
+
+ /* Choose MAC address index between 0 and 31 */
+ emac_arch_set_mac_addr_index(idx);
+
+ /* Compute and store MAC addr high */
+ val = 0;
+ for (i = 3; i >= 0; i--)
+ val = (val << 8) | dev->dev_addr[i];
+ emac_arch_set_mac_addr_high(val);
+
+ val = (dev->dev_addr[5] << 8) | dev->dev_addr[4];
+ val |= (1 << EMAC_S_VALID)
+ | (1 << EMAC_S_MATCHFILTER)
+ | (IDX_TO_CHAN(idx) << EMAC_S_CHANNEL);
+
+ emac_arch_set_mac_addr_low(val);
+}
+
+/*
+ * Reset the EMAC software ring.
+ */
+static void emac_reset_ring(struct emac_private *ep)
+{
+ struct emac_desc *desc;
+ int i;
+
+ desc = (struct emac_desc *) ep->emac_dsc_base;
+
+ /* Reset rx ring */
+ ep->cur_rx = desc;
+ ep->skb_rx_dirty = 0;
+
+ for (i = 0; i < RX_RING_SIZE; desc++, i++)
+ desc->packet_flags_len = EMAC_DESC_FLAG_OWNER;
+
+ /* Reset tx ring */
+ desc = (struct emac_desc *) (ep->emac_dsc_base + (RX_RING_SIZE << 4));
+ ep->cur_tx = desc;
+ ep->dirty_tx = desc;
+ ep->head_tx = desc;
+ ep->skb_cur = 0;
+ ep->skb_tx_dirty = 0;
+ ep->tx_full = 0;
+ ep->fatal_error = 0;
+ ep->count_tx = 0;
+
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ desc->buff = NULL;
+ desc->buff_offset_len = 0;
+ desc->packet_flags_len = 0;
+ desc->next = NULL;
+ ep->tx_skbuff[i] = NULL;
+ desc++;
+ }
+}
+
+/*
+ * Reconfigure the EMAC device
+ */
+static int emac_reconfigure_device(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ if (!ep->slave) {
+ unsigned int hash1;
+ unsigned int hash2;
+ unsigned int promisc;
+ unsigned int control;
+ unsigned int rx_intmask;
+ unsigned int tx_intmask;
+ unsigned int unicast;
+ unsigned int *mac_ctx;
+ int i;
+
+ /* Get state */
+ hash1 = emac_arch_get_hash1();
+ hash2 = emac_arch_get_hash2();
+ promisc = emac_arch_get_promisc();
+ control = emac_arch_get_control();
+
+ unicast = emac_get_reg(EMAC_RXUNICASTSET);
+ rx_intmask = emac_get_reg(EMAC_RXINTMASKSET);
+ tx_intmask = emac_get_reg(EMAC_TXINTMASKSET);
+
+ /* Save MAC addresses */
+ mac_ctx = kmalloc((sizeof(u32) << 1) * MAC_ADDR_NUM, GFP_KERNEL);
+ for (i = 0; i < MAC_ADDR_NUM; i++) {
+ emac_arch_set_mac_addr_index(i);
+ mac_ctx[i << 1] = emac_arch_get_mac_addr_high();
+ mac_ctx[(i << 1) + 1] = emac_arch_get_mac_addr_low();
+ }
+
+ /* Reset the EMAC */
+ if (netif_running(dev)) {
+ emac_close(dev);
+ emac_reset(dev, GEMAC_RESET_WARM);
+ emac_open(dev);
+ } else {
+ emac_reset(dev, GEMAC_RESET_WARM);
+ }
+
+ /* Restore MAC addresses */
+ for (i = 0; i < MAC_ADDR_NUM; i++) {
+ emac_arch_set_mac_addr_index(i);
+ emac_arch_set_mac_addr_high(mac_ctx[i << 1]);
+ emac_arch_set_mac_addr_low(mac_ctx[(i << 1) + 1]);
+ }
+ kfree(mac_ctx);
+
+ /* Restore state */
+ emac_arch_set_hash1(hash1);
+ emac_arch_set_hash2(hash2);
+ emac_arch_set_promisc(hash2);
+ emac_arch_set_control(hash2);
+
+ emac_set_reg(EMAC_RXINTMASKSET, rx_intmask);
+ emac_set_reg(EMAC_TXINTMASKSET, tx_intmask);
+ emac_set_reg(EMAC_RXUNICASTSET, unicast);
+ } else
+ /* Only master core can reset the device */
+ return -EBUSY;
+
+ return 0;
+}
+
+/*
+ * Reset the EMAC hardware.
+ */
+static int emac_reset(struct net_device *dev, int reset_mode)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ volatile u32 *preg;
+ int i;
+
+ if (!ep->slave) {
+
+ if (reset_mode == GEMAC_RESET_COLD) {
+ /* Reset integrated switch if any */
+ emac_arch_reset_switch();
+
+ /* Reset EMAC control Module */
+ emac_arch_reset_ectl();
+ }
+
+ /* Reset EMAC */
+ emac_setbit_reg(EMAC_SOFTRESET, EMAC_B_SOFTRST);
+
+ /* Wait until reset has occured or timeout */
+ for (i = 0; i <= HZ / 2; i++) {
+ if (emac_get_reg(EMAC_SOFTRESET) == 0x0)
+ break;
+ if (i == HZ / 2)
+ return 1;
+ msleep_interruptible(1);
+ }
+ }
+
+ /* Set interrupt pacing */
+ emac_arch_set_pacing();
+
+ if (!ep->slave) {
+ /* Reset MAC, TX, RX Control */
+ emac_set_reg(EMAC_MACCONTROL, 0);
+ emac_set_reg(EMAC_TXCONTROL, 0);
+ emac_set_reg(EMAC_RXCONTROL, 0);
+
+ if (reset_mode == GEMAC_RESET_COLD) {
+#ifdef EMAC_DO_INIT_MDIO
+ /* MII/MDIO setup */
+ mdio_init(emac_get_reg(EMAC_TXIDVER));
+#endif
+
+ /* Init HDPs to NULL for all channels */
+ emac_set_reg(EMAC_TX0HDP, 0);
+ emac_set_reg(EMAC_TX1HDP, 0);
+ emac_set_reg(EMAC_TX2HDP, 0);
+ emac_set_reg(EMAC_TX3HDP, 0);
+ emac_set_reg(EMAC_TX4HDP, 0);
+ emac_set_reg(EMAC_TX5HDP, 0);
+ emac_set_reg(EMAC_TX6HDP, 0);
+ emac_set_reg(EMAC_TX7HDP, 0);
+ emac_set_reg(EMAC_RX0HDP, 0);
+ emac_set_reg(EMAC_RX1HDP, 0);
+ emac_set_reg(EMAC_RX2HDP, 0);
+ emac_set_reg(EMAC_RX3HDP, 0);
+ emac_set_reg(EMAC_RX4HDP, 0);
+ emac_set_reg(EMAC_RX5HDP, 0);
+ emac_set_reg(EMAC_RX6HDP, 0);
+ emac_set_reg(EMAC_RX7HDP, 0);
+
+ /* Clear statistic registers */
+ if (reset_mode == GEMAC_RESET_COLD) {
+ preg = emac_addr_reg(EMAC_RXGOODFRAMES);
+ for (i = 0; i < EMAC_NUM_STATREGS; i++)
+ *preg++ = 0;
+ }
+
+ /* Clear all MAC addresses */
+ emac_arch_clear_mac_addr();
+ }
+ }
+
+ /* Register my MAC address */
+ emac_register_mac_addr(dev, emac_idx);
+
+ if (!ep->slave) {
+
+ /* Used for pause frame (IEEE 802.3x) but not working for MC */
+ emac_set_reg(EMAC_MACSRCADDRLO,
+ (dev->dev_addr[0] << 8) | dev->dev_addr[1]);
+ emac_set_reg(EMAC_MACSRCADDRHI,
+ (dev->dev_addr[2] << 24) | (dev->dev_addr[3] << 16) |
+ (dev->dev_addr[4] << 8) | (dev->dev_addr[5]));
+
+ if (reset_mode == GEMAC_RESET_COLD) {
+
+ /* Init completion pointers to NULL */
+ emac_set_reg(EMAC_RX0INTACK, 0x0);
+ emac_set_reg(EMAC_RX1INTACK, 0x0);
+ emac_set_reg(EMAC_RX2INTACK, 0x0);
+ emac_set_reg(EMAC_RX3INTACK, 0x0);
+ emac_set_reg(EMAC_RX4INTACK, 0x0);
+ emac_set_reg(EMAC_RX5INTACK, 0x0);
+ emac_set_reg(EMAC_RX6INTACK, 0x0);
+ emac_set_reg(EMAC_RX7INTACK, 0x0);
+ emac_set_reg(EMAC_TX0INTACK, 0x0);
+ emac_set_reg(EMAC_TX1INTACK, 0x0);
+ emac_set_reg(EMAC_TX2INTACK, 0x0);
+ emac_set_reg(EMAC_TX3INTACK, 0x0);
+ emac_set_reg(EMAC_TX4INTACK, 0x0);
+ emac_set_reg(EMAC_TX5INTACK, 0x0);
+ emac_set_reg(EMAC_TX6INTACK, 0x0);
+ emac_set_reg(EMAC_TX7INTACK, 0x0);
+ }
+
+ /* Reset unicast, multicast, broadcast Rx */
+ emac_reset_filter(dev, IDX_TO_CHAN(emac_idx), reset_mode);
+
+ /* Set device modes */
+ emac_set_modes(dev);
+
+ /* Disable all channel interrupts */
+ if (reset_mode == GEMAC_RESET_COLD) {
+ emac_set_reg(EMAC_RXINTMASKCLEAR, 0xff);
+ emac_set_reg(EMAC_TXINTMASKCLEAR, 0xff);
+ }
+
+ /* Enable host and stat interrupts */
+ emac_set_reg(EMAC_MACINTMASKSET, EMAC_B_HOSTINT | EMAC_B_STATINT);
+ } else {
+ /* Fixup mode according to hw configuration */
+ emac_fixup_modes(dev);
+ }
+
+ /* Enable TX and RX interrupts for a given channel */
+ emac_arch_enable_irq(EMAC_TXINTMASKSET, IDX_TO_CHAN(emac_idx));
+ emac_arch_enable_irq(EMAC_RXINTMASKSET, IDX_TO_CHAN(emac_idx));
+
+ /* Reset transmit/receive buffers */
+ if (reset_mode == GEMAC_RESET_WARM)
+ (void) emac_reset_ring(ep);
+
+ /* Set default receive filter: unicast, multicast and broadcast */
+ emac_set_filter(dev, IDX_TO_CHAN(emac_idx));
+
+ return 0;
+}
+
+/*
+ * Open the device
+ */
+static int emac_open(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ if (!ep->slave) {
+ /* Set MAC mode (Gigabyte, xxMII, pacing, etc) */
+ emac_arch_init_control(ep->mode_flags & EMAC_CONFIG_PACING);
+
+ /* Enable RX and TX */
+ emac_set_reg(EMAC_TXCONTROL, 1);
+ emac_set_reg(EMAC_RXCONTROL, 1);
+ }
+
+ /* Ready for RX */
+ emac_set_reg(EMAC_RX0HDP + (IDX_TO_CHAN(emac_idx) << 2),
+ PTR_TO_HW(ep->cur_rx));
+
+ /* Enable interrupts at the ECTL level (misc int only for master) */
+ ectl_arch_enable_irq(IDX_TO_CHAN(emac_idx), !ep->slave);
+
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+/*
+ * Close the device
+ */
+static int emac_close(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ netif_stop_queue(dev);
+
+ /* Disable interrupt at the ECTL level */
+ ectl_arch_disable_irq(IDX_TO_CHAN(emac_idx));
+
+ /* Teardown RX and TX */
+ emac_set_reg(EMAC_RXTEARDOWN, IDX_TO_CHAN(emac_idx));
+ emac_set_reg(EMAC_TXTEARDOWN, IDX_TO_CHAN(emac_idx));
+
+ if (!ep->fatal_error) {
+ unsigned int tmp;
+
+ /* Wait for the teardown to complete */
+ for (tmp = 0; tmp != 0xfffffffc;
+ tmp = emac_get_reg(EMAC_RX0INTACK + \
+ (IDX_TO_CHAN(emac_idx) << 2)))
+ emac_set_reg(EMAC_RX0INTACK + \
+ (IDX_TO_CHAN(emac_idx) << 2), tmp);
+
+ for (tmp = 0; tmp != 0xfffffffc;
+ tmp = emac_get_reg(EMAC_TX0INTACK + \
+ (IDX_TO_CHAN(emac_idx) << 2)))
+ emac_set_reg(EMAC_TX0INTACK + \
+ (IDX_TO_CHAN(emac_idx) << 2), tmp);
+ }
+
+ if (!ep->slave) {
+ /* Disable Rx, Tx and MII */
+ emac_set_reg(EMAC_TXCONTROL, 0);
+ emac_set_reg(EMAC_RXCONTROL, 0);
+ emac_set_reg(EMAC_MACCONTROL, 0);
+ }
+
+ /* Clean up the software ring */
+ emac_reset_ring(ep);
+
+ return 0;
+}
+
+/*
+ * Initialize the EMAC software ring.
+ * For the rx ring, we initialize the packet descriptors with pre-allocated
+ * skbuff to the packet MTU size.
+ * For the tx ring, we only initialize it with NULL values.
+ */
+static int emac_setup_ring(struct emac_private *ep)
+{
+ struct emac_desc *desc;
+ int i;
+ struct sk_buff *skb;
+
+ /* Setup rx ring*/
+ desc = (struct emac_desc *) ep->emac_dsc_base;
+ ep->rx_desc_base = desc;
+ ep->cur_rx = desc;
+ ep->skb_rx_dirty = 0;
+
+ /* Allocate ring buffers via sk buffers */
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ skb = netdev_alloc_skb_ip_align(ep->dev, ep->packet_mtu);
+ if (!skb)
+ return 1;
+
+ ep->rx_skbuff[i] = skb;
+ desc->buff = (u8 *) skb->data;
+ desc->buff_offset_len = ep->packet_mtu;
+ desc->packet_flags_len = EMAC_DESC_FLAG_OWNER;
+ desc->next = PTR_TO_HW(desc + 1);
+ desc++;
+ }
+
+ /* Loop the ring */
+ (desc - 1)->next = PTR_TO_HW(ep->rx_desc_base);
+
+ /* Setup tx ring */
+ desc = (struct emac_desc *) (ep->emac_dsc_base + (RX_RING_SIZE << 4));
+ ep->tx_desc_base = desc;
+ ep->cur_tx = desc;
+ ep->dirty_tx = desc;
+ ep->head_tx = desc;
+ ep->skb_cur = 0;
+ ep->skb_tx_dirty = 0;
+ ep->tx_full = 0;
+ ep->fatal_error = 0;
+ ep->count_tx = 0;
+
+ for (i = 0; i < TX_RING_SIZE; i++) {
+ desc->buff = NULL;
+ desc->buff_offset_len = 0;
+ desc->packet_flags_len = 0;
+ desc->next = NULL;
+ ep->tx_skbuff[i] = NULL;
+ desc++;
+ }
+ return 0;
+}
+
+/*
+ * Called by the kernel to send a packet out into the void
+ * of the net.
+ */
+static void emac_timeout(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
+ dev->stats.tx_errors++;
+ dev->trans_start = jiffies;
+ if (!ep->tx_full)
+ netif_wake_queue(dev);
+}
+
+/*
+ * Set or clear the multicast filter for this adaptor.
+ */
+#ifdef EMAC_HAS_ALE_SUPPORT
+static void emac_reset_filter(struct net_device *dev,
+ int channel,
+ int reset_mode)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ int i;
+
+ if (reset_mode == GEMAC_RESET_COLD) {
+ /* Alloc mcast list */
+ ep->mcast_infos = kmalloc(3 * EMAC_V_ALE_MAX_MCAST, GFP_KERNEL);
+ /* Init mcast table */
+ if (ep->mcast_infos) {
+ memset(ep->mcast_infos, 0x0, 3 * EMAC_V_ALE_MAX_MCAST);
+ /* Clear device multicast list */
+ for (i = 0; i < EMAC_V_ALE_MAX_MCAST; i++) {
+ emac_set_reg(EMAC_ALETBLW0, 0);
+ emac_set_reg(EMAC_ALETBLW1, 0);
+ emac_set_reg(EMAC_ALETBLW2, 0);
+ emac_set_reg(EMAC_ALETBLCTL,
+ i | EMAC_B_ALE_WRITE_RDZ);
+ }
+ }
+ }
+ if ((reset_mode == GEMAC_RESET_WARM) && (ep->mcast_infos)) {
+ /* Re-set device multicast list */
+ for (i = 0; i < ep->mcast_valid_len; i++) {
+ emac_set_reg(EMAC_ALETBLW0, ep->mcast_infos[3*i]);
+ emac_set_reg(EMAC_ALETBLW1, ep->mcast_infos[3*i+1]);
+ emac_set_reg(EMAC_ALETBLW2, ep->mcast_infos[3*i+2]);
+ emac_set_reg(EMAC_ALETBLCTL,
+ i | EMAC_B_ALE_WRITE_RDZ);
+ }
+ /* Set mcast mode if needed */
+ if (ep->mcast_valid_len)
+ emac_setbit_reg(EMAC_ALEUNKNOWNVLAN,
+ EMAC_B_REG_MCAST_FLOOD_ON);
+ }
+}
+
+static void emac_set_modes(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ if (ep->mode_flags & EMAC_CONFIG_RXCRC)
+ ep->packet_mtu = PKT_MTU_CRC;
+ else
+ ep->packet_mtu = PKT_MTU_NOCRC;
+
+ /* If PASSERROR is set, enable both ERROR and short frames */
+ if (ep->mode_flags & EMAC_CONFIG_PASSERROR)
+ emac_setbit_reg(EMAC_MACCONTROL,
+ EMAC_B_RXCEFEN | EMAC_B_RXCSFEN);
+
+ /* If PASSCONTROL is set, enable control frames */
+ if (ep->mode_flags & EMAC_CONFIG_PASSCONTROL)
+ emac_setbit_reg(EMAC_MACCONTROL, EMAC_B_RXCMFEN);
+
+ /* Set MAC loopback if requested */
+ if (ep->mode_flags & EMAC_CONFIG_MACLOOPBACK)
+ emac_setbit_reg(EMAC_MACCONTROL, EMAC_B_LOOPBACK);
+}
+
+static void emac_set_filter(struct net_device *dev, int channel)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ emac_set_reg(CPSW_SW_CTL, 0x000000F4); /* Enable switch flow control */
+ emac_set_reg(CPSW_RX_CH_MAP, 0x11110000); /* RX switch priority */
+
+ emac_set_reg(EMAC_ALECONTROL, 0x80000004); /* ALE enable and bypass */
+ emac_set_reg(EMAC_ALEPRESCALE, 0x0); /* no mcat/broadcast limit */
+ emac_set_reg(EMAC_ALEUNKNOWNVLAN, 0x07030307); /* need it!!! */
+ emac_set_reg(EMAC_ALEPORTCTL0, 0x3); /* Port 0 in forward state */
+ emac_set_reg(EMAC_ALEPORTCTL1, 0x3); /* Port 1 in forward state */
+ emac_set_reg(EMAC_ALEPORTCTL2, 0x3); /* Port 2 in forward state */
+}
+
+static void emac_set_rx_mode(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ struct dev_mc_list *dmi = dev->mc_list;
+ u8 hashval, tmpval;
+ u32 info0, info1, info2;
+ int i;
+
+ /* Only master can use promiscuous or multicast */
+ if (ep->slave)
+ return;
+
+ if (dev->flags & IFF_PROMISC)
+ /* Set promiscuous mode */
+ emac_setbit_reg(EMAC_ALECONTROL, EMAC_B_ALEBYPASS);
+ else
+ /* Reset promiscuous mode */
+ emac_clearbit_reg(EMAC_ALECONTROL, EMAC_B_ALEBYPASS);
+
+ /* Clear multicast config */
+ emac_clearbit_reg(EMAC_ALEUNKNOWNVLAN, EMAC_B_MCAST_FLOOD_ON |
+ EMAC_B_REG_MCAST_FLOOD_ON);
+
+ /* Clear old multicast list that will not be reused */
+ for (i = dev->mc_count; i < ep->mcast_valid_len; i++) {
+ emac_setbit_reg(EMAC_ALETBLW0, 0);
+ emac_setbit_reg(EMAC_ALETBLW1, 0);
+ emac_setbit_reg(EMAC_ALETBLW2, 0);
+ emac_setbit_reg(EMAC_ALETBLCTL,
+ i | EMAC_B_ALE_WRITE_RDZ);
+ }
+
+ if ((dev->flags & IFF_ALLMULTI) ||
+ (dev->mc_count > EMAC_V_ALE_MAX_MCAST)) {
+ /* Set all multicast */
+ emac_setbit_reg(EMAC_ALEUNKNOWNVLAN, EMAC_B_MCAST_FLOOD_ON |
+ EMAC_B_REG_MCAST_FLOOD_ON);
+ } else {
+ /* Set mcast from a list */
+ for (i = 0; i < dev->mc_count; i++, dmi = dmi->next) {
+ u8 *p_dmi = dmi->dmi_addr;
+
+ info0 = (((p_dmi[2]&0x0ff)<<24) |
+ ((p_dmi[3]&0x0ff)<<16) |
+ ((p_dmi[4]&0x0ff)<<8) | ((p_dmi[5]&0x0ff)<<0));
+ info1 = ((3<<30) | (0<<29) | (1<<28) |
+ ((0&0x0fff)<<16) |
+ ((p_dmi[0]&0x0ff)<<8) | ((p_dmi[1]&0x0ff)<<0));
+ info2 = (0 << 3) | (7 & 0x7);
+
+ /* Only support group multicast */
+ if (!(*p_dmi & 1)) {
+ /* don't use this entry */
+ info0 = 0;
+ info1 = 1;
+ info2 = 2;
+ }
+
+ emac_set_reg(EMAC_ALETBLW0, info0);
+ emac_set_reg(EMAC_ALETBLW1, info1);
+ emac_set_reg(EMAC_ALETBLW2, info2);
+ emac_set_reg(EMAC_ALETBLCTL,
+ i | EMAC_B_ALE_WRITE_RDZ);
+
+ /* Copy mcast list */
+ if (ep->mcast_infos) {
+ ep->mcast_infos[3*i] = info0;
+ ep->mcast_infos[3*i+1] = info1;
+ ep->mcast_infos[3*i+2] = info2;
+ }
+ }
+
+ /* set multicast mode if needed */
+ if (dev->mc_count)
+ emac_setbit_reg(EMAC_ALEUNKNOWNVLAN,
+ EMAC_B_REG_MCAST_FLOOD_ON);
+
+ /* Remember mcast valid addrs count */
+ ep->mcast_valid_len = dev->mc_count;
+ }
+}
+
+#else /* !EMAC_HAS_ALE_SUPPORT */
+
+static void emac_reset_filter(struct net_device *dev,
+ int channel,
+ int reset_mode)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ /* Reset multicast hash table */
+ emac_set_reg(EMAC_MACHASH1, 0);
+ emac_set_reg(EMAC_MACHASH2, 0);
+
+ /* Set buffer offset */
+ emac_set_reg(EMAC_RXBUFFEROFFSET, 0);
+
+ /* Reset RX (M)ulticast (B)roadcast (P)romiscuous Enable register */
+ emac_set_reg(EMAC_RXMBPENABLE, 0);
+
+ if (reset_mode == GEMAC_RESET_COLD) {
+ /* Clear unicast RX on channel 0-7 */
+ emac_set_reg(EMAC_RXUNICASTCLEAR, 0xff);
+ } else
+ emac_set_reg(EMAC_RXUNICASTCLEAR, (1 << channel));
+}
+
+static void emac_fixup_modes(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ if (emac_get_reg(EMAC_RXMBPENABLE) & EMAC_B_RXPASSCRC)
+ ep->packet_mtu = PKT_MTU_CRC;
+ else
+ ep->packet_mtu = PKT_MTU_NOCRC;
+}
+
+static void emac_set_modes(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ if (ep->slave)
+ return;
+
+ if (ep->mode_flags & EMAC_CONFIG_RXCRC) {
+ emac_setbit_reg(EMAC_RXMBPENABLE, EMAC_B_RXPASSCRC);
+ ep->packet_mtu = PKT_MTU_CRC;
+ } else
+ ep->packet_mtu = PKT_MTU_NOCRC;
+
+ /* If PASSERROR is set, enable both ERROR and short frames */
+ if (ep->mode_flags & EMAC_CONFIG_PASSERROR)
+ emac_setbit_reg(EMAC_RXMBPENABLE,
+ EMAC_B_RXCEFEN | EMAC_B_RXCSFEN);
+
+ /* If PASSCONTROL is set, enable control frames */
+ if (ep->mode_flags & EMAC_CONFIG_PASSCONTROL)
+ emac_setbit_reg(EMAC_RXMBPENABLE, EMAC_B_RXCMFEN);
+
+ /* Set the channel configuration to priority if requested */
+ if (ep->mode_flags & EMAC_CONFIG_CHPRIORITY)
+ emac_setbit_reg(EMAC_MACCONTROL, EMAC_B_TXPTYPE);
+
+ /* Set MAC loopback if requested */
+ if (ep->mode_flags & EMAC_CONFIG_MACLOOPBACK)
+ emac_setbit_reg(EMAC_MACCONTROL, EMAC_B_LOOPBACK);
+}
+
+static void emac_set_filter(struct net_device *dev, int channel)
+{
+ struct emac_private *ep = netdev_priv(dev);
+
+ /* Set unicast for the given channel */
+ emac_set_reg(EMAC_RXUNICASTSET, 1 << channel);
+
+ if (!ep->slave) {
+ emac_set_reg(EMAC_RXMBPENABLE, 0);
+ emac_setbit_reg(EMAC_RXMBPENABLE, EMAC_B_MULTEN);
+ emac_setbit_reg(EMAC_RXMBPENABLE, EMAC_B_BROADEN);
+ emac_setbit_reg(EMAC_RXMBPENABLE, (channel | (channel << 8)));
+ }
+}
+
+static void emac_set_rx_mode(struct net_device *dev)
+{
+ struct emac_private *ep = netdev_priv(dev);
+ struct netdev_hw_addr *ha;
+ u8 hashval, tmpval;
+ u32 machash1, machash2;
+ int i;
+
+ /* Only master can use promiscuous or multicast */
+ if (ep->slave)
+ return;
+
+ if (dev->flags & IFF_PROMISC) {
+ /* Set promiscuous mode */
+ emac_setbit_reg(EMAC_RXMBPENABLE, EMAC_B_RXCAFEN);
+ } else {
+ /* Reset promiscuous mode */
+ emac_clearbit_reg(EMAC_RXMBPENABLE, EMAC_B_RXCAFEN);
+ }
+
+ if (dev->flags & IFF_ALLMULTI) {
+
+ /* Set all multicast filter */
+ emac_setbit_reg(EMAC_MACHASH1, 0xffffffff);
+ emac_setbit_reg(EMAC_MACHASH2, 0xffffffff);
+
+ } else {
+
+ hashval = 0;
+ machash1 = 0;
+ machash2 = 0;
+
+ netdev_for_each_mc_addr(ha, dev) {
+ u8 *addr = ha->addr;
+
+ /* Only support group multicast */
+ if (!(*addr & 1))
+ continue;
+
+ for (i = 0; i < 2; i++) {
+ tmpval = (u8) *addr++;
+ hashval ^= (u8) (tmpval >> 2) ^ (tmpval << 4);
+ tmpval = (u8) *addr++;
+ hashval ^= (u8) (tmpval >> 4) ^ (tmpval << 2);
+ tmpval = (u8) *addr++;
+ hashval ^= (u8) (tmpval >> 6) ^ (tmpval);
+ }
+
+ if (hashval & 0x20)
+ machash2 |= (1 << (hashval & 0x1f));
+ else
+ machash1 |= (1 << (hashval & 0x1f));
+ }
+
+ /* Set computed multicast filter */
+ emac_setbit_reg(EMAC_MACHASH1, machash1);
+ emac_setbit_reg(EMAC_MACHASH2, machash2);
+ }
+}
+#endif /* !EMAC_HAS_ALE_SUPPORT */
+
+#ifdef EMAC_TIMER_TICK_MDIO
+/*
+ * This function should be called for each device in the system on a
+ * periodic basis of 100mS (10 times a second). It is used to check the
+ * status of the EMAC and MDIO device.
+ */
+static void emac_timer_tick(unsigned long data)
+{
+ struct net_device *dev = (struct net_device *)data;
+ struct emac_private *ep = netdev_priv(dev);
+ unsigned int link_status;
+ unsigned int link_event = mdio_timer_tick();
+ unsigned int intfmacsel = mdio_get_macsel();
+
+ /*
+ * Signal the MDIO
+ */
+ if (link_event == MDIO_EVENT_LINKUP) {
+ link_status = mdio_get_status();
+ if (link_status == MDIO_LINKSTATUS_FD10 ||
+ link_status == MDIO_LINKSTATUS_FD100 ||
+ link_status == MDIO_LINKSTATUS_FD1000) {
+ emac_setbit_reg(EMAC_MACCONTROL, EMAC_B_FULLDUPLEX);
+ if (intfmacsel == DEVSTAT_MACSEL_RMII)
+ emac_setbit_reg(EMAC_MACCONTROL,
+ EMAC_B_RMIIDUPLEXMODE);
+ } else {
+ emac_clearbit_reg(EMAC_MACCONTROL, EMAC_B_FULLDUPLEX);
+ if (intfmacsel == DEVSTAT_MACSEL_RMII)
+ emac_clearbit_reg(EMAC_MACCONTROL,
+ EMAC_B_RMIIDUPLEXMODE);
+ }
+
+ if (link_status == MDIO_LINKSTATUS_FD1000)
+ emac_setbit_reg(EMAC_MACCONTROL, EMAC_B_GIG);
+
+ if ((link_status == MDIO_LINKSTATUS_FD10 ||
+ link_status == MDIO_LINKSTATUS_HD10) &&
+ (intfmacsel == DEVSTAT_MACSEL_RMII))
+ /* Clear bit to set clock to 2.5 MHz */
+ emac_clearbit_reg(EMAC_MACCONTROL, EMAC_B_RMIISPEED);
+
+ if ((link_status == MDIO_LINKSTATUS_FD100 ||
+ link_status == MDIO_LINKSTATUS_HD100) &&
+ (intfmacsel == DEVSTAT_MACSEL_RMII))
+ /* Set bit to set clock to 25 MHz */
+ emac_setbit_reg(EMAC_MACCONTROL, EMAC_B_RMIISPEED);
+
+ /* eventually call platform hook for RMII out of reset */
+ rmii_arch_fix();
+
+ /* Put RGMII in forced link mode */
+ if (intfmacsel == DEVSTAT_MACSEL_RGMII)
+ emac_clearbit_reg(EMAC_MACCONTROL, EMAC_B_RGMIIEN);
+ }
+ mod_timer(&emac_timer, jiffies + EMAC_TIMER_PERIOD);
+}
+#endif /* EMAC_TIMER_TICK_MDIO */
+
+static const char emac_driver_name[] = "EMAC";
+
+static const struct net_device_ops gemac_netdev_ops = {
+ .ndo_open = emac_open,
+ .ndo_stop = emac_close,
+ .ndo_start_xmit = emac_start_xmit,
+ .ndo_tx_timeout = emac_timeout,
+ .ndo_set_multicast_list = emac_set_rx_mode,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_get_stats = emac_get_stats,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = emac_poll,
+#endif
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static const struct ethtool_ops gemac_ethtool_ops = {
+};
+
+static int __init emac_probe(struct platform_device *pdev)
+{
+ struct net_device *netdev;
+ struct emac_private *ep;
+ int res = -EINVAL;
+ int i;
+#ifdef EMAC_ARCH_HAS_MAC_ADDR
+ char hw_emac_addr[6];
+#endif
+ struct resource *cur_res;
+ static int ndevs;
+ int irq = 0;
+
+ emac_idx = get_emac_idx();
+
+ if (ndevs >= EMAC_MAX_INSTANCE) {
+ printk(KERN_ERR "gemac: Invalid instance: %d (max=%d)\n",
+ ndevs, EMAC_MAX_INSTANCE);
+ return -EINVAL;
+ }
+
+ /* Allocate private information */
+ netdev = alloc_etherdev(sizeof(struct emac_private));
+ if (!netdev)
+ return -ENOMEM;
+
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+
+ ep = netdev_priv(netdev);
+ ep->dev = netdev;
+
+ spin_lock_init(&ep->lock);
+
+ /* Get irqs numbers */
+ cur_res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "IRQ_SRC");
+ if (cur_res)
+ irq = cur_res->start;
+
+ /* Get EMAC I/O addresses */
+ ep->emac_reg_base = 0;
+ ep->ectl_reg_base = 0;
+ ep->emac_dsc_base = 0;
+ ep->mdio_reg_base = 0;
+
+ cur_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "EMAC_REG_BASE");
+ if (cur_res)
+ ep->emac_reg_base = cur_res->start;
+
+ cur_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "ECTL_REG_BASE");
+ if (cur_res)
+ ep->ectl_reg_base = cur_res->start;
+
+ cur_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "EMAC_DSC_BASE");
+ if (cur_res)
+ ep->emac_dsc_base = cur_res->start
+ + ((IDX_TO_CHAN(emac_idx) * QUEUE_DESC_NUM) << 4);
+
+#ifdef EMAC_DO_INIT_MDIO
+ cur_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "MDIO_REG_BASE");
+ if (cur_res)
+ ep->mdio_reg_base = cur_res->start;
+#endif
+
+ if (!irq || !ep->emac_reg_base || !ep->ectl_reg_base || !ep->emac_dsc_base) {
+ printk(KERN_ERR "%s: Unable to get hardware resources\n",
+ netdev->name);
+ goto error;
+ }
+
+ ep->mode_flags = config.flags;
+
+ if (emac_check_shared_capability())
+ ep->slave = emac_shared;
+
+ netdev->base_addr = ep->emac_reg_base;
+ netdev->dev_id = pdev->id;
+
+#ifdef EMAC_ARCH_HAS_MAC_ADDR
+ /* SoC or board hw has MAC address */
+ if (config.enetaddr[0] == 0 && config.enetaddr[1] == 0 &&
+ config.enetaddr[2] == 0 && config.enetaddr[3] == 0 &&
+ config.enetaddr[4] == 0 && config.enetaddr[5] == 0) {
+ if (!emac_arch_get_mac_addr(hw_emac_addr))
+ for (i = 0; i <= 5; i++)
+ config.enetaddr[i] = hw_emac_addr[i] & 0xff;
+ }
+#endif
+ /* Setup the device */
+ res = emac_reset(netdev, GEMAC_RESET_COLD);
+ if (res) {
+ free_netdev(netdev);
+ goto error;
+ }
+
+ /* driver system function */
+ ether_setup(netdev);
+
+ /* Set generic Ethernet operations */
+ netdev->netdev_ops = &gemac_netdev_ops;
+ netdev->watchdog_timeo = TX_TIMEOUT;
+ netdev->ethtool_ops = &gemac_ethtool_ops;
+
+ platform_set_drvdata(pdev, netdev);
+
+ /* Register Ethernet device */
+ res = register_netdev(netdev);
+ if (res) {
+ printk(KERN_ERR "%s: Unable to register netdev\n",
+ netdev->name);
+ goto error;
+ }
+
+ /* Setup transmit/receive buffers */
+ res = emac_setup_ring(ep);
+ if (res) {
+ printk(KERN_ERR "%s: Unable to allocate memory\n",
+ netdev->name);
+ goto error;
+ }
+
+#ifdef EMAC_TIMER_TICK_MDIO
+ /* Set EMAC timer */
+ init_timer(&emac_timer);
+ emac_timer.function = emac_timer_tick;
+ emac_timer.data = (unsigned long)netdev;
+ mod_timer(&emac_timer, jiffies + EMAC_TIMER_PERIOD);
+#endif
+
+ /* Install our interrupt handler(s) */
+#ifdef EMAC_HAS_SEPARATE_RXTX_IRQS
+ if ((request_irq(irq, emac_rx_interrupt, _INTFLAG, "GEMAC RX", netdev) == 0) &&
+ (request_irq(irq + 1, emac_tx_interrupt, _INTFLAG, "GEMAC TX", netdev) == 0))
+ netdev->irq = irq;
+#else
+ if (request_irq(irq, emac_interrupt, 0, "GEMAC", netdev) == 0)
+ netdev->irq = irq;
+#endif
+
+ printk(KERN_INFO "%s: EMAC(%d) driver version 2.1 IRQ=%d queue=%d %s",
+ netdev->name, pdev->id, netdev->irq, IDX_TO_CHAN(emac_idx),
+ emac_shared ? "shared\n" : "\n");
+
+ printk(KERN_INFO "%s: MAC address=", netdev->name);
+ for (i = 0; i < 5; i++)
+ printk(KERN_CONT "%02x:", netdev->dev_addr[i]);
+#ifdef CONFIG_SGMII
+ printk(KERN_CONT "%02x PHY=SGMII\n", netdev->dev_addr[i]);
+#else
+ printk(KERN_CONT "%02x PHY=%s%sMII\n", netdev->dev_addr[i],
+ ((mdio_get_macsel() & DEVSTAT_MACSEL_RMII) ? "R" : ""),
+ ((mdio_get_macsel() & DEVSTAT_MACSEL_GMII) ? "G" : ""));
+#endif
+ ++ndevs;
+ return 0;
+
+ error:
+ free_netdev(netdev);
+ return res;
+}
+
+static struct platform_driver emac_driver = {
+ .driver = {
+ .name = (char *) emac_driver_name,
+ .owner = THIS_MODULE,
+ },
+ .probe = emac_probe,
+};
+
+static void __exit emac_cleanup(void)
+{
+ platform_driver_unregister(&emac_driver);
+}
+module_exit(emac_cleanup);
+
+/*
+ * Initialize GEMAC controller
+ */
+static int emac_init(void)
+{
+ return platform_driver_register(&emac_driver);
+}
+
+module_init(emac_init);
+
diff --git a/drivers/net/c6x_gmdio.c b/drivers/net/c6x_gmdio.c
new file mode 100644
index 0000000..6a82519
--- /dev/null
+++ b/drivers/net/c6x_gmdio.c
@@ -0,0 +1,514 @@
+/*
+ * Port on Texas Instruments TMS320C6x architecture
+ *
+ * Copyright (C) 2006, 2009, 2010 Texas Instruments Incorporated
+ * Author: Nicolas Videau (nicolas.videau@xxxxxxxxxx)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+
+#include <asm/setup.h>
+#include <asm/irq.h>
+#include <asm/gmdio.h>
+#include <asm/pll.h>
+
+static struct mdio_status mdios;
+
+/*
+ * Tick counts for timeout of each state
+ * Note that NWAYSTART falls through to NWAYWAIT which falls through
+ * to LINKWAIT. The timeout is not reset progressing from one state
+ * to the next, so the system has 5 seconds total to find a link.
+ */
+static unsigned int phy_timeout[] = { 2, /* MDIO_PHY_MDIOINIT - min-delay */
+ 6, /* MDIO_PHY_RESET - .5 sec max */
+ 41, /* MDIO_PHY_NWAYSTART - 4 seconds */
+ 41, /* MDIO_PHY_NWAYWAIT - 4 seconds */
+ 51, /* MDIO_PHY_LINKWAIT - 5 seconds */
+ 0 };/* MDIO_PHY_LINKED - no timeout */
+
+static void mdio_init_state_machine(void)
+{
+ mdios.phy_addr = 0;
+ mdios.phy_state = MDIO_PHY_MDIOINIT;
+ mdios.phy_ticks = 0;
+ mdios.link_status = MDIO_LINKSTATUS_NOLINK;
+}
+
+/*
+ * Initialize the MDIO
+ */
+int mdio_init(unsigned int txid_version)
+{
+#ifdef CONFIG_SOC_TMS320C6455
+ /* Get MAC interface */
+ mdios.macsel = (DSCR_DEVSTAT >> DEVSTAT_MACSEL_OFFSET) &
+ DEVSTAT_MACSEL_MASK;
+#else
+ /* Default (no gigabit support) */
+ mdios.macsel = DEVSTAT_MACSEL_MII;
+#endif
+
+ /* Get Transmit identification and version */
+ mdios.emac_txidver = txid_version;
+
+ mdios.mode = MDIO_MODE_AUTONEG; /* autonegotiate */
+ mdio_init_state_machine();
+ mdio_set_reg(MDIO_CONTROL, EMAC_B_ENABLE | (VBUSCLK & EMAC_M_CLKDIV));
+ return 0;
+}
+
+/*
+ * Return the current MDIO/PHY status
+ */
+unsigned int mdio_get_status(void)
+{
+ return mdios.link_status;
+}
+
+/*
+ * Return the current MDIO/PHY interface
+ */
+unsigned int mdio_get_macsel(void)
+{
+ mdios.macsel = (DSCR_DEVSTAT >> DEVSTAT_MACSEL_OFFSET) &
+ DEVSTAT_MACSEL_MASK;
+
+ return mdios.macsel;
+}
+
+/*
+ * Force a switch to the specified PHY, and start the negotiation process
+ */
+static unsigned int mdio_init_phy_1(volatile unsigned int phy_addr)
+{
+ unsigned short val, ack;
+ unsigned int lval;
+ unsigned int i;
+
+ mdios.phy_addr = phy_addr;
+ mdios.link_status = MDIO_LINKSTATUS_NOLINK;
+
+ /* Shutdown all other PHYs */
+ lval = mdio_get_reg(MDIO_ALIVE);
+ for (i = 0; lval; i++, lval >>= 1)
+ if ((lval & 1) && (i != phy_addr)) {
+ mdio_phy_write(MDIO_PHY_REG_CONTROL,
+ i,
+ (MDIO_PHY_B_ISOLATE |
+ MDIO_PHY_B_POWERDOWN));
+ mdio_phy_wait();
+ }
+
+#ifdef CONFIG_ARCH_BOARD_DSK6455
+ /* Settings for Broadcom phys */
+ if (mdios.macsel == DEVSTAT_MACSEL_RGMII) {
+ /* Put phy in copper mode */
+ mdio_phy_write(MDIO_PHY_REG_ACCESS, phy_addr,
+ MDIO_PHY_B_COPPER);
+ mdio_phy_wait_res_ack(val, ack);
+
+ /* If the PHY did not ACK the write, return zero */
+ if (!ack)
+ return 0;
+
+ mdio_phy_write(0x10, phy_addr, 0x0000);
+ mdio_phy_wait();
+
+ /* Put phy in RGMII mode/in-band status data for PG 2.0 */
+ if (mdios.emac_txidver != 0x000C1207) {
+ mdio_phy_write(MDIO_PHY_REG_SHADOW, phy_addr,
+ MDIO_PHY_B_INBAND);
+ mdio_phy_wait_res_ack(val, ack);
+
+ /* If the PHY did not ACK the write, return zero */
+ if (!ack)
+ return 0;
+ }
+
+ /* Patch for (older) board revB with R822 soldered */
+ mdio_phy_write(MDIO_PHY_REG_ACCESS, phy_addr, 0x8C00);
+ mdio_phy_wait_res_ack(val, ack);
+ /* End of patch */
+ }
+#endif
+
+ if (mdios.macsel == DEVSTAT_MACSEL_GMII) {
+ /* Put phy in copper mode */
+ mdio_phy_write(MDIO_PHY_REG_ACCESS, phy_addr,
+ MDIO_PHY_B_COPPER);
+ mdio_phy_wait_res_ack(val, ack);
+
+ /* If the PHY did not ACK the write, return zero */
+ if (!ack)
+ return 0;
+ }
+
+ /* Ready for next init step */
+ mdios.phy_state = MDIO_PHY_RESET;
+ mdios.phy_ticks = 0;
+
+ return 1;
+}
+
+static unsigned int mdio_init_phy_2(volatile unsigned int phy_addr)
+{
+ unsigned short val, val2, valgig = 0;
+
+ mdios.phy_addr = phy_addr;
+
+ /* Read the STATUS reg to check autonegotiation capability */
+ mdio_phy_read(MDIO_PHY_REG_STATUS, phy_addr);
+ mdio_phy_wait_res(val);
+
+ if ((mdios.macsel == DEVSTAT_MACSEL_GMII) ||
+ (mdios.macsel == DEVSTAT_MACSEL_RGMII)) {
+ mdio_phy_read(MDIO_PHY_REG_EXTSTATUS, phy_addr);
+ mdio_phy_wait_res(valgig);
+ }
+
+ /* See if we auto-neg or not */
+ if ((mdios.mode & MDIO_MODE_AUTONEG) &&
+ (val & MDIO_PHY_B_AUTOCAPABLE)) {
+ /* We will use NWAY */
+
+ /* Advertise 1000 for supported interfaces */
+ if ((mdios.macsel == DEVSTAT_MACSEL_GMII) ||
+ (mdios.macsel == DEVSTAT_MACSEL_RGMII)) {
+ valgig >>= 4;
+ valgig &= MDIO_PHY_ADV_FD1000;
+
+ mdio_phy_write(MDIO_PHY_REG_1000CONTROL, phy_addr,
+ valgig);
+ mdio_phy_wait();
+ }
+
+ /* Shift down the capability bits */
+ val >>= 6;
+
+ /* Mask with the capabilities */
+ val &= (MDIO_PHY_B_AFD100 | MDIO_PHY_B_AHD100 |
+ MDIO_PHY_B_AFD10 | MDIO_PHY_B_AHD10);
+
+ /* Set Ethernet message bit */
+ val |= MDIO_PHY_B_MSG;
+
+ /* Write out advertisement */
+ mdio_phy_write(MDIO_PHY_REG_ADVERTISE, phy_addr, val);
+ mdio_phy_wait();
+
+ /* Start NWAY */
+ mdio_phy_write(MDIO_PHY_REG_CONTROL,
+ phy_addr,
+ MDIO_PHY_B_AUTONEGEN);
+ mdio_phy_wait();
+
+ mdio_phy_write(MDIO_PHY_REG_CONTROL,
+ phy_addr,
+ (MDIO_PHY_B_AUTONEGEN | MDIO_PHY_B_AUTORESTART));
+ mdio_phy_wait();
+
+ /* Setup current state */
+ mdios.mode |= MDIO_MODE_NWAYACTIVE;
+ mdios.phy_state = MDIO_PHY_NWAYSTART;
+ mdios.phy_ticks = 0;
+
+ } else {
+ /* Otherwise use a fixed configuration */
+
+ /* Shift down the capability bits */
+ val >>= 10;
+
+ /* Mask with possible modes */
+ val &= (MDIO_MODE_HD10 | MDIO_MODE_FD10 |
+ MDIO_MODE_HD100 | MDIO_MODE_FD100);
+
+ if ((mdios.macsel == DEVSTAT_MACSEL_GMII) ||
+ (mdios.macsel == DEVSTAT_MACSEL_RGMII)) {
+ valgig >>= 8;
+ valgig &= MDIO_MODE_FD1000;
+
+ valgig &= mdios.mode;
+ }
+
+ /* Mask with what the User wants to allow */
+ val &= mdios.mode;
+
+ /* If nothing if left, move on */
+ if ((!val) && (!valgig))
+ return 0;
+
+ /* Setup Control word and pending status */
+ if (valgig) {
+ val2 = MDIO_PHY_B_SPEEDMSB | MDIO_PHY_B_DUPLEXFULL;
+ mdios.pending_status = MDIO_LINKSTATUS_FD1000;
+ } else if (val & MDIO_MODE_FD100) {
+ val2 = MDIO_PHY_B_SPEEDLSB | MDIO_PHY_B_DUPLEXFULL;
+ mdios.pending_status = MDIO_LINKSTATUS_FD100;
+ } else if (val & MDIO_MODE_HD100) {
+ val2 = MDIO_PHY_B_SPEEDLSB;
+ mdios.pending_status = MDIO_LINKSTATUS_HD100;
+ } else if (val & MDIO_MODE_FD10) {
+ val2 = MDIO_PHY_B_DUPLEXFULL;
+ mdios.pending_status = MDIO_PHY_B_FD10;
+ } else {
+ val2 = 0;
+ mdios.pending_status = MDIO_LINKSTATUS_HD10;
+ }
+
+ /* Add in loopback if user wanted it */
+ if (mdios.mode & MDIO_MODE_LOOPBACK)
+ val2 |= MDIO_PHY_B_LOOPBACK;
+
+ /* Configure PHY */
+ mdio_phy_write(MDIO_PHY_REG_CONTROL, phy_addr,
+ (val2 | MDIO_PHY_B_AUTORESTART));
+ mdio_phy_wait();
+
+ /* Add in external loopback with plug if user wanted it */
+ if (mdios.mode & MDIO_MODE_EXTLOOPBACK) {
+ mdio_phy_write(MDIO_PHY_REG_SHADOW, phy_addr,
+ MDIO_PHY_B_EXTLOOPBACK);
+ mdio_phy_wait();
+ }
+
+ /* Setup current state */
+ mdios.mode &= ~MDIO_MODE_NWAYACTIVE;
+ mdios.phy_state = MDIO_PHY_LINKWAIT;
+ mdios.phy_ticks = 0;
+ }
+ return 1;
+}
+
+
+/*
+ * Called each 100mS to check if MDIO status has changed.
+ * A MDIO event is returned.
+ */
+unsigned int mdio_timer_tick(void)
+{
+ unsigned int res = MDIO_EVENT_NOCHANGE;
+ unsigned short val, val2, valgig = 0, valgig2 = 0, ack;
+ unsigned int lval;
+
+ if (mdios.phy_state == MDIO_PHY_LINKED) {
+ /*
+ * Check for a "link-change" status indication or a link
+ * down indication.
+ */
+ lval = mdio_get_reg(MDIO_LINKINTRAW) & 1;
+ mdio_set_reg(MDIO_LINKINTRAW, lval);
+ if (lval || !(mdio_get_reg(MDIO_LINK) & (1 << mdios.phy_addr))) {
+
+ mdios.link_status = MDIO_LINKSTATUS_NOLINK;
+ mdios.phy_ticks = 0;
+ res = MDIO_EVENT_LINKDOWN;
+
+ /* If not NWAY, just wait for link */
+ if (!(mdios.mode & MDIO_MODE_NWAYACTIVE))
+ mdios.phy_state = MDIO_PHY_LINKWAIT;
+ else {
+ /* Handle NWAY condition */
+ mdio_phy_read(MDIO_PHY_REG_STATUS,
+ mdios.phy_addr);
+ mdio_phy_wait();
+ mdio_phy_read(MDIO_PHY_REG_STATUS,
+ mdios.phy_addr);
+ mdio_phy_wait_res_ack(val, ack);
+ if (!ack)
+ mdio_init_state_machine();
+
+ else if (!(val & MDIO_PHY_B_LINKSTATUS)) {
+ /* No Link - restart NWAY */
+ mdios.phy_state = MDIO_PHY_NWAYSTART;
+
+ mdio_phy_write(MDIO_PHY_REG_CONTROL,
+ mdios.phy_addr,
+ (MDIO_PHY_B_AUTONEGEN |
+ MDIO_PHY_B_AUTORESTART));
+ mdio_phy_wait();
+ } else
+ /* We have a Link - re-read NWAY params */
+ mdios.phy_state = MDIO_PHY_NWAYWAIT;
+ }
+ }
+ }
+
+ if (mdios.phy_state != MDIO_PHY_LINKED) {
+ /* Bump the time counter */
+ mdios.phy_ticks++;
+
+ /* Process differently based on state */
+ switch (mdios.phy_state) {
+#if !(defined(CONFIG_SOC_TMS3206472) || defined(CONFIG_SOC_TMS3206474)) && \
+ !defined(CONFIG_SOC_TMS3206457)
+ case MDIO_PHY_RESET:
+ /* Don't read reset status for the first 100 to 200 ms */
+ if (mdios.phy_ticks < 2)
+ break;
+
+ /* See if the PHY has come out of reset */
+ mdio_phy_read(MDIO_PHY_REG_CONTROL,
+ mdios.phy_addr);
+ mdio_phy_wait_res_ack(val, ack);
+
+ if (ack && !(val & MDIO_PHY_B_RESET)) {
+ /* PHY is not reset.
+ * If the PHY init is going well, break out */
+ if (mdio_init_phy_2(mdios.phy_addr))
+ break;
+ /* Else, this PHY is toast.
+ * Manually trigger a timeout */
+ mdios.phy_ticks = phy_timeout[mdios.phy_state];
+ }
+
+ /* Fall through to timeout check */
+#endif
+ case MDIO_PHY_MDIOINIT:
+ check_timeout:
+ /* Here we just check timeout and try to find a PHY */
+ if (mdios.phy_ticks >= phy_timeout[mdios.phy_state]) {
+ /* Try the next PHY if anything but
+ * a MDIOINIT condition */
+ if (mdios.phy_state != MDIO_PHY_MDIOINIT)
+ if (++mdios.phy_addr == 32)
+ mdios.phy_addr = 0;
+
+ lval = mdio_get_reg(MDIO_ALIVE);
+
+ for (val = 0; val < 32; val++) {
+
+ if ((lval & (1 << mdios.phy_addr)) &&
+ (mdio_init_phy_1(mdios.phy_addr)))
+ break;
+
+ if (++mdios.phy_addr == 32)
+ mdios.phy_addr = 0;
+ }
+
+ /* If we didn't find a PHY, try again */
+ if (val == 32) {
+ mdios.phy_addr = 0;
+ mdios.phy_state = MDIO_PHY_MDIOINIT;
+ mdios.phy_ticks = 0;
+ res = MDIO_EVENT_PHYERROR;
+ }
+ }
+ break;
+
+ case MDIO_PHY_NWAYSTART:
+ /* Start NWAY */
+
+ /* Read the CONTROL reg to verify "restart" is not set */
+ mdio_phy_read(MDIO_PHY_REG_CONTROL, mdios.phy_addr);
+ mdio_phy_wait_res_ack(val, ack);
+ if (!ack) {
+ mdio_init_state_machine();
+ break;
+ }
+
+ if (val & MDIO_PHY_B_AUTORESTART)
+ goto check_timeout;
+
+ /* Flush latched "link status" from the STATUS reg */
+ mdio_phy_read(MDIO_PHY_REG_STATUS, mdios.phy_addr);
+ mdio_phy_wait();
+
+ mdios.phy_state = MDIO_PHY_NWAYWAIT;
+
+ /* Fallthrough */
+
+ case MDIO_PHY_NWAYWAIT:
+ /* Waiting NWAY to complete */
+
+ /* Read the STATUS reg to check for "complete" */
+ mdio_phy_read(MDIO_PHY_REG_STATUS, mdios.phy_addr);
+ mdio_phy_wait_res_ack(val, ack);
+ if (!ack) {
+ mdio_init_state_machine();
+ break;
+ }
+
+ if (!(val & MDIO_PHY_B_AUTOCOMPLETE))
+ goto check_timeout;
+#if !(defined(CONFIG_SOC_TMS3206472) || defined(CONFIG_SOC_TMS3206474)) && !defined(CONFIG_SOC_TMS3206457)
+ /* We can now check the negotiation results */
+ if ((mdios.macsel == DEVSTAT_MACSEL_GMII) ||
+ (mdios.macsel == DEVSTAT_MACSEL_RGMII)) {
+ mdio_phy_read(MDIO_PHY_REG_1000CONTROL,
+ mdios.phy_addr);
+ mdio_phy_wait_res(valgig);
+ mdio_phy_read(MDIO_PHY_REG_1000STATUS,
+ mdios.phy_addr);
+ mdio_phy_wait_res(valgig2);
+ }
+#endif
+ mdio_phy_read(MDIO_PHY_REG_ADVERTISE, mdios.phy_addr);
+ mdio_phy_wait_res(val);
+ mdio_phy_read(MDIO_PHY_REG_PARTNER, mdios.phy_addr);
+ mdio_phy_wait_res(val2);
+
+ val2 &= val;
+#if !(defined(CONFIG_SOC_TMS3206472) || defined(CONFIG_SOC_TMS3206474)) && !defined(CONFIG_SOC_TMS3206457)
+ if ((valgig & MDIO_PHY_ADV_FD1000) &&
+ (valgig2 & MDIO_PHY_PRT_FD1000))
+ mdios.pending_status = MDIO_LINKSTATUS_FD1000;
+ else if (val2 & MDIO_PHY_B_AFD100)
+ mdios.pending_status = MDIO_LINKSTATUS_FD100;
+#else
+ if (val2 & MDIO_PHY_B_AFD100)
+ mdios.pending_status = MDIO_LINKSTATUS_FD100;
+#endif
+ else if (val2 & MDIO_PHY_B_AHD100)
+ mdios.pending_status = MDIO_LINKSTATUS_HD100;
+ else if (val2 & MDIO_PHY_B_AFD10)
+ mdios.pending_status = MDIO_LINKSTATUS_FD10;
+ else if (val2 & MDIO_PHY_B_AHD10)
+ mdios.pending_status = MDIO_LINKSTATUS_HD10;
+ else if (val & MDIO_PHY_B_AHD100)
+ mdios.pending_status = MDIO_LINKSTATUS_HD100;
+ else
+ mdios.pending_status = MDIO_LINKSTATUS_HD10;
+
+ mdios.phy_state = MDIO_PHY_LINKWAIT;
+
+ case MDIO_PHY_LINKWAIT:
+ /* Waiting for LINK */
+ mdio_phy_read(MDIO_PHY_REG_STATUS, mdios.phy_addr);
+ mdio_phy_wait_res_ack(val, ack);
+ if (!ack) {
+ mdio_init_state_machine();
+ break;
+ }
+
+ if (!(val & MDIO_PHY_B_LINKSTATUS))
+ goto check_timeout;
+
+ /* Make sure we're linked in the MDIO module as well */
+ lval = mdio_get_reg(MDIO_LINK);
+ if (!(lval & (1 << mdios.phy_addr)))
+ goto check_timeout;
+
+ /* Start monitoring this PHY */
+ mdio_set_reg(MDIO_USERPHYSEL0, mdios.phy_addr);
+
+ /* Clear the link change flag so we can detect a "re-link" later */
+ mdio_set_reg(MDIO_LINKINTRAW, 1);
+
+ /* Setup our linked state */
+ mdios.phy_state = MDIO_PHY_LINKED;
+ mdios.link_status = mdios.pending_status;
+ res = MDIO_EVENT_LINKUP;
+ break;
+ }
+ }
+ return res;
+}
--
1.6.2.5
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