forked from Minki/linux
73f8318286
Alex Landau writes in the forums: Previously, changing the MAC address (e.g. via ifconfig) resulted in a generic function to be called that only changed a variable in memory. This patch also updated the Blackfin MAC address registers to filter the correct new MAC. Signed-off-by: Alex Landau <lirsb@yahoo.com> Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Acked-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
1004 lines
24 KiB
C
1004 lines
24 KiB
C
/*
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* File: drivers/net/bfin_mac.c
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* Based on:
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* Maintainer:
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* Bryan Wu <bryan.wu@analog.com>
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*
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* Original author:
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* Luke Yang <luke.yang@analog.com>
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*
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* Created:
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* Description:
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*
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* Modified:
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* Copyright 2004-2006 Analog Devices Inc.
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*
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* Bugs: Enter bugs at http://blackfin.uclinux.org/
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*
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* This program is free software ; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation ; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY ; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program ; see the file COPYING.
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* If not, write to the Free Software Foundation,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/errno.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/crc32.h>
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#include <linux/device.h>
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#include <linux/spinlock.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/platform_device.h>
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#include <asm/dma.h>
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#include <linux/dma-mapping.h>
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#include <asm/blackfin.h>
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#include <asm/cacheflush.h>
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#include <asm/portmux.h>
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#include "bfin_mac.h"
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#define DRV_NAME "bfin_mac"
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#define DRV_VERSION "1.1"
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#define DRV_AUTHOR "Bryan Wu, Luke Yang"
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#define DRV_DESC "Blackfin BF53[67] on-chip Ethernet MAC driver"
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MODULE_AUTHOR(DRV_AUTHOR);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION(DRV_DESC);
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#if defined(CONFIG_BFIN_MAC_USE_L1)
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# define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size)
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# define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr)
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#else
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# define bfin_mac_alloc(dma_handle, size) \
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dma_alloc_coherent(NULL, size, dma_handle, GFP_KERNEL)
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# define bfin_mac_free(dma_handle, ptr) \
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dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle)
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#endif
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#define PKT_BUF_SZ 1580
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#define MAX_TIMEOUT_CNT 500
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/* pointers to maintain transmit list */
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static struct net_dma_desc_tx *tx_list_head;
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static struct net_dma_desc_tx *tx_list_tail;
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static struct net_dma_desc_rx *rx_list_head;
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static struct net_dma_desc_rx *rx_list_tail;
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static struct net_dma_desc_rx *current_rx_ptr;
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static struct net_dma_desc_tx *current_tx_ptr;
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static struct net_dma_desc_tx *tx_desc;
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static struct net_dma_desc_rx *rx_desc;
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static void desc_list_free(void)
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{
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struct net_dma_desc_rx *r;
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struct net_dma_desc_tx *t;
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int i;
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#if !defined(CONFIG_BFIN_MAC_USE_L1)
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dma_addr_t dma_handle = 0;
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#endif
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if (tx_desc) {
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t = tx_list_head;
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for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) {
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if (t) {
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if (t->skb) {
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dev_kfree_skb(t->skb);
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t->skb = NULL;
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}
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t = t->next;
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}
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}
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bfin_mac_free(dma_handle, tx_desc);
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}
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if (rx_desc) {
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r = rx_list_head;
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for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) {
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if (r) {
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if (r->skb) {
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dev_kfree_skb(r->skb);
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r->skb = NULL;
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}
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r = r->next;
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}
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}
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bfin_mac_free(dma_handle, rx_desc);
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}
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}
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static int desc_list_init(void)
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{
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int i;
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struct sk_buff *new_skb;
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#if !defined(CONFIG_BFIN_MAC_USE_L1)
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/*
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* This dma_handle is useless in Blackfin dma_alloc_coherent().
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* The real dma handler is the return value of dma_alloc_coherent().
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*/
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dma_addr_t dma_handle;
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#endif
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tx_desc = bfin_mac_alloc(&dma_handle,
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sizeof(struct net_dma_desc_tx) *
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CONFIG_BFIN_TX_DESC_NUM);
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if (tx_desc == NULL)
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goto init_error;
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rx_desc = bfin_mac_alloc(&dma_handle,
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sizeof(struct net_dma_desc_rx) *
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CONFIG_BFIN_RX_DESC_NUM);
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if (rx_desc == NULL)
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goto init_error;
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/* init tx_list */
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tx_list_head = tx_list_tail = tx_desc;
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for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) {
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struct net_dma_desc_tx *t = tx_desc + i;
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struct dma_descriptor *a = &(t->desc_a);
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struct dma_descriptor *b = &(t->desc_b);
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/*
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* disable DMA
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* read from memory WNR = 0
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* wordsize is 32 bits
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* 6 half words is desc size
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* large desc flow
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*/
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a->config = WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
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a->start_addr = (unsigned long)t->packet;
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a->x_count = 0;
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a->next_dma_desc = b;
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/*
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* enabled DMA
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* write to memory WNR = 1
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* wordsize is 32 bits
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* disable interrupt
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* 6 half words is desc size
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* large desc flow
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*/
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b->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
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b->start_addr = (unsigned long)(&(t->status));
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b->x_count = 0;
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t->skb = NULL;
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tx_list_tail->desc_b.next_dma_desc = a;
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tx_list_tail->next = t;
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tx_list_tail = t;
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}
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tx_list_tail->next = tx_list_head; /* tx_list is a circle */
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tx_list_tail->desc_b.next_dma_desc = &(tx_list_head->desc_a);
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current_tx_ptr = tx_list_head;
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/* init rx_list */
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rx_list_head = rx_list_tail = rx_desc;
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for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) {
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struct net_dma_desc_rx *r = rx_desc + i;
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struct dma_descriptor *a = &(r->desc_a);
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struct dma_descriptor *b = &(r->desc_b);
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/* allocate a new skb for next time receive */
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new_skb = dev_alloc_skb(PKT_BUF_SZ + 2);
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if (!new_skb) {
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printk(KERN_NOTICE DRV_NAME
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": init: low on mem - packet dropped\n");
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goto init_error;
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}
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skb_reserve(new_skb, 2);
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r->skb = new_skb;
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/*
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* enabled DMA
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* write to memory WNR = 1
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* wordsize is 32 bits
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* disable interrupt
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* 6 half words is desc size
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* large desc flow
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*/
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a->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE;
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/* since RXDWA is enabled */
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a->start_addr = (unsigned long)new_skb->data - 2;
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a->x_count = 0;
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a->next_dma_desc = b;
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/*
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* enabled DMA
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* write to memory WNR = 1
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* wordsize is 32 bits
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* enable interrupt
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* 6 half words is desc size
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* large desc flow
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*/
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b->config = DMAEN | WNR | WDSIZE_32 | DI_EN |
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NDSIZE_6 | DMAFLOW_LARGE;
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b->start_addr = (unsigned long)(&(r->status));
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b->x_count = 0;
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rx_list_tail->desc_b.next_dma_desc = a;
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rx_list_tail->next = r;
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rx_list_tail = r;
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}
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rx_list_tail->next = rx_list_head; /* rx_list is a circle */
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rx_list_tail->desc_b.next_dma_desc = &(rx_list_head->desc_a);
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current_rx_ptr = rx_list_head;
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return 0;
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init_error:
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desc_list_free();
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printk(KERN_ERR DRV_NAME ": kmalloc failed\n");
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return -ENOMEM;
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}
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/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/
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/* Set FER regs to MUX in Ethernet pins */
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static int setup_pin_mux(int action)
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{
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#if defined(CONFIG_BFIN_MAC_RMII)
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u16 pin_req[] = P_RMII0;
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#else
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u16 pin_req[] = P_MII0;
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#endif
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if (action) {
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if (peripheral_request_list(pin_req, DRV_NAME)) {
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printk(KERN_ERR DRV_NAME
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": Requesting Peripherals failed\n");
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return -EFAULT;
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}
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} else
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peripheral_free_list(pin_req);
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return 0;
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}
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/* Wait until the previous MDC/MDIO transaction has completed */
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static void poll_mdc_done(void)
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{
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int timeout_cnt = MAX_TIMEOUT_CNT;
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/* poll the STABUSY bit */
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while ((bfin_read_EMAC_STAADD()) & STABUSY) {
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mdelay(10);
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if (timeout_cnt-- < 0) {
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printk(KERN_ERR DRV_NAME
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": wait MDC/MDIO transaction to complete timeout\n");
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break;
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}
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}
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}
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/* Read an off-chip register in a PHY through the MDC/MDIO port */
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static u16 read_phy_reg(u16 PHYAddr, u16 RegAddr)
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{
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poll_mdc_done();
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/* read mode */
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bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) |
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SET_REGAD(RegAddr) |
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STABUSY);
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poll_mdc_done();
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return (u16) bfin_read_EMAC_STADAT();
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}
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/* Write an off-chip register in a PHY through the MDC/MDIO port */
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static void raw_write_phy_reg(u16 PHYAddr, u16 RegAddr, u32 Data)
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{
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bfin_write_EMAC_STADAT(Data);
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/* write mode */
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bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) |
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SET_REGAD(RegAddr) |
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STAOP |
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STABUSY);
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poll_mdc_done();
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}
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static void write_phy_reg(u16 PHYAddr, u16 RegAddr, u32 Data)
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{
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poll_mdc_done();
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raw_write_phy_reg(PHYAddr, RegAddr, Data);
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}
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/* set up the phy */
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static void bf537mac_setphy(struct net_device *dev)
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{
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u16 phydat;
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struct bf537mac_local *lp = netdev_priv(dev);
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/* Program PHY registers */
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pr_debug("start setting up phy\n");
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/* issue a reset */
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raw_write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, 0x8000);
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/* wait half a second */
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msleep(500);
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phydat = read_phy_reg(lp->PhyAddr, PHYREG_MODECTL);
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/* advertise flow control supported */
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phydat = read_phy_reg(lp->PhyAddr, PHYREG_ANAR);
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phydat |= (1 << 10);
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write_phy_reg(lp->PhyAddr, PHYREG_ANAR, phydat);
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phydat = 0;
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if (lp->Negotiate)
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phydat |= 0x1000; /* enable auto negotiation */
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else {
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if (lp->FullDuplex)
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phydat |= (1 << 8); /* full duplex */
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else
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phydat &= (~(1 << 8)); /* half duplex */
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if (!lp->Port10)
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phydat |= (1 << 13); /* 100 Mbps */
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else
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phydat &= (~(1 << 13)); /* 10 Mbps */
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}
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if (lp->Loopback)
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phydat |= (1 << 14); /* enable TX->RX loopback */
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write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, phydat);
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msleep(500);
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phydat = read_phy_reg(lp->PhyAddr, PHYREG_MODECTL);
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/* check for SMSC PHY */
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if ((read_phy_reg(lp->PhyAddr, PHYREG_PHYID1) == 0x7) &&
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((read_phy_reg(lp->PhyAddr, PHYREG_PHYID2) & 0xfff0) == 0xC0A0)) {
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/*
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* we have SMSC PHY so reqest interrupt
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* on link down condition
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*/
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/* enable interrupts */
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write_phy_reg(lp->PhyAddr, 30, 0x0ff);
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}
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}
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/**************************************************************************/
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void setup_system_regs(struct net_device *dev)
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{
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int phyaddr;
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unsigned short sysctl, phydat;
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u32 opmode;
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struct bf537mac_local *lp = netdev_priv(dev);
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int count = 0;
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phyaddr = lp->PhyAddr;
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/* Enable PHY output */
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if (!(bfin_read_VR_CTL() & PHYCLKOE))
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bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
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/* MDC = 2.5 MHz */
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sysctl = SET_MDCDIV(24);
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/* Odd word alignment for Receive Frame DMA word */
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/* Configure checksum support and rcve frame word alignment */
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#if defined(BFIN_MAC_CSUM_OFFLOAD)
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sysctl |= RXDWA | RXCKS;
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#else
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sysctl |= RXDWA;
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#endif
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bfin_write_EMAC_SYSCTL(sysctl);
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/* auto negotiation on */
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/* full duplex */
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/* 100 Mbps */
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phydat = PHY_ANEG_EN | PHY_DUPLEX | PHY_SPD_SET;
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write_phy_reg(phyaddr, PHYREG_MODECTL, phydat);
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/* test if full duplex supported */
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do {
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msleep(100);
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phydat = read_phy_reg(phyaddr, PHYREG_MODESTAT);
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if (count > 30) {
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printk(KERN_NOTICE DRV_NAME ": Link is down\n");
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printk(KERN_NOTICE DRV_NAME
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"please check your network connection\n");
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break;
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}
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count++;
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} while (!(phydat & 0x0004));
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phydat = read_phy_reg(phyaddr, PHYREG_ANLPAR);
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if ((phydat & 0x0100) || (phydat & 0x0040)) {
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opmode = FDMODE;
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} else {
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opmode = 0;
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printk(KERN_INFO DRV_NAME
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": Network is set to half duplex\n");
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}
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#if defined(CONFIG_BFIN_MAC_RMII)
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opmode |= RMII; /* For Now only 100MBit are supported */
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#endif
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bfin_write_EMAC_OPMODE(opmode);
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bfin_write_EMAC_MMC_CTL(RSTC | CROLL);
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/* Initialize the TX DMA channel registers */
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bfin_write_DMA2_X_COUNT(0);
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bfin_write_DMA2_X_MODIFY(4);
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bfin_write_DMA2_Y_COUNT(0);
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bfin_write_DMA2_Y_MODIFY(0);
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/* Initialize the RX DMA channel registers */
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bfin_write_DMA1_X_COUNT(0);
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bfin_write_DMA1_X_MODIFY(4);
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bfin_write_DMA1_Y_COUNT(0);
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bfin_write_DMA1_Y_MODIFY(0);
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}
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static void setup_mac_addr(u8 *mac_addr)
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{
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u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]);
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u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]);
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/* this depends on a little-endian machine */
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bfin_write_EMAC_ADDRLO(addr_low);
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bfin_write_EMAC_ADDRHI(addr_hi);
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}
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static int bf537mac_set_mac_address(struct net_device *dev, void *p)
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{
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struct sockaddr *addr = p;
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if (netif_running(dev))
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return -EBUSY;
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memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
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setup_mac_addr(dev->dev_addr);
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return 0;
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}
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static void adjust_tx_list(void)
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{
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int timeout_cnt = MAX_TIMEOUT_CNT;
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if (tx_list_head->status.status_word != 0
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&& current_tx_ptr != tx_list_head) {
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goto adjust_head; /* released something, just return; */
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}
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/*
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* if nothing released, check wait condition
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* current's next can not be the head,
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* otherwise the dma will not stop as we want
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*/
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if (current_tx_ptr->next->next == tx_list_head) {
|
|
while (tx_list_head->status.status_word == 0) {
|
|
mdelay(10);
|
|
if (tx_list_head->status.status_word != 0
|
|
|| !(bfin_read_DMA2_IRQ_STATUS() & 0x08)) {
|
|
goto adjust_head;
|
|
}
|
|
if (timeout_cnt-- < 0) {
|
|
printk(KERN_ERR DRV_NAME
|
|
": wait for adjust tx list head timeout\n");
|
|
break;
|
|
}
|
|
}
|
|
if (tx_list_head->status.status_word != 0) {
|
|
goto adjust_head;
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
adjust_head:
|
|
do {
|
|
tx_list_head->desc_a.config &= ~DMAEN;
|
|
tx_list_head->status.status_word = 0;
|
|
if (tx_list_head->skb) {
|
|
dev_kfree_skb(tx_list_head->skb);
|
|
tx_list_head->skb = NULL;
|
|
} else {
|
|
printk(KERN_ERR DRV_NAME
|
|
": no sk_buff in a transmitted frame!\n");
|
|
}
|
|
tx_list_head = tx_list_head->next;
|
|
} while (tx_list_head->status.status_word != 0
|
|
&& current_tx_ptr != tx_list_head);
|
|
return;
|
|
|
|
}
|
|
|
|
static int bf537mac_hard_start_xmit(struct sk_buff *skb,
|
|
struct net_device *dev)
|
|
{
|
|
struct bf537mac_local *lp = netdev_priv(dev);
|
|
unsigned int data;
|
|
|
|
current_tx_ptr->skb = skb;
|
|
|
|
/*
|
|
* Is skb->data always 16-bit aligned?
|
|
* Do we need to memcpy((char *)(tail->packet + 2), skb->data, len)?
|
|
*/
|
|
if ((((unsigned int)(skb->data)) & 0x02) == 2) {
|
|
/* move skb->data to current_tx_ptr payload */
|
|
data = (unsigned int)(skb->data) - 2;
|
|
*((unsigned short *)data) = (unsigned short)(skb->len);
|
|
current_tx_ptr->desc_a.start_addr = (unsigned long)data;
|
|
/* this is important! */
|
|
blackfin_dcache_flush_range(data, (data + (skb->len)) + 2);
|
|
|
|
} else {
|
|
*((unsigned short *)(current_tx_ptr->packet)) =
|
|
(unsigned short)(skb->len);
|
|
memcpy((char *)(current_tx_ptr->packet + 2), skb->data,
|
|
(skb->len));
|
|
current_tx_ptr->desc_a.start_addr =
|
|
(unsigned long)current_tx_ptr->packet;
|
|
if (current_tx_ptr->status.status_word != 0)
|
|
current_tx_ptr->status.status_word = 0;
|
|
blackfin_dcache_flush_range((unsigned int)current_tx_ptr->
|
|
packet,
|
|
(unsigned int)(current_tx_ptr->
|
|
packet + skb->len) +
|
|
2);
|
|
}
|
|
|
|
/* enable this packet's dma */
|
|
current_tx_ptr->desc_a.config |= DMAEN;
|
|
|
|
/* tx dma is running, just return */
|
|
if (bfin_read_DMA2_IRQ_STATUS() & 0x08)
|
|
goto out;
|
|
|
|
/* tx dma is not running */
|
|
bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a));
|
|
/* dma enabled, read from memory, size is 6 */
|
|
bfin_write_DMA2_CONFIG(current_tx_ptr->desc_a.config);
|
|
/* Turn on the EMAC tx */
|
|
bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE);
|
|
|
|
out:
|
|
adjust_tx_list();
|
|
current_tx_ptr = current_tx_ptr->next;
|
|
dev->trans_start = jiffies;
|
|
dev->stats.tx_packets++;
|
|
dev->stats.tx_bytes += (skb->len);
|
|
return 0;
|
|
}
|
|
|
|
static void bf537mac_rx(struct net_device *dev)
|
|
{
|
|
struct sk_buff *skb, *new_skb;
|
|
struct bf537mac_local *lp = netdev_priv(dev);
|
|
unsigned short len;
|
|
|
|
/* allocate a new skb for next time receive */
|
|
skb = current_rx_ptr->skb;
|
|
new_skb = dev_alloc_skb(PKT_BUF_SZ + 2);
|
|
if (!new_skb) {
|
|
printk(KERN_NOTICE DRV_NAME
|
|
": rx: low on mem - packet dropped\n");
|
|
dev->stats.rx_dropped++;
|
|
goto out;
|
|
}
|
|
/* reserve 2 bytes for RXDWA padding */
|
|
skb_reserve(new_skb, 2);
|
|
current_rx_ptr->skb = new_skb;
|
|
current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2;
|
|
|
|
len = (unsigned short)((current_rx_ptr->status.status_word) & RX_FRLEN);
|
|
skb_put(skb, len);
|
|
blackfin_dcache_invalidate_range((unsigned long)skb->head,
|
|
(unsigned long)skb->tail);
|
|
|
|
dev->last_rx = jiffies;
|
|
skb->dev = dev;
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
#if defined(BFIN_MAC_CSUM_OFFLOAD)
|
|
skb->csum = current_rx_ptr->status.ip_payload_csum;
|
|
skb->ip_summed = CHECKSUM_PARTIAL;
|
|
#endif
|
|
|
|
netif_rx(skb);
|
|
dev->stats.rx_packets++;
|
|
dev->stats.rx_bytes += len;
|
|
current_rx_ptr->status.status_word = 0x00000000;
|
|
current_rx_ptr = current_rx_ptr->next;
|
|
|
|
out:
|
|
return;
|
|
}
|
|
|
|
/* interrupt routine to handle rx and error signal */
|
|
static irqreturn_t bf537mac_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *dev = dev_id;
|
|
int number = 0;
|
|
|
|
get_one_packet:
|
|
if (current_rx_ptr->status.status_word == 0) {
|
|
/* no more new packet received */
|
|
if (number == 0) {
|
|
if (current_rx_ptr->next->status.status_word != 0) {
|
|
current_rx_ptr = current_rx_ptr->next;
|
|
goto real_rx;
|
|
}
|
|
}
|
|
bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() |
|
|
DMA_DONE | DMA_ERR);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
real_rx:
|
|
bf537mac_rx(dev);
|
|
number++;
|
|
goto get_one_packet;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void bf537mac_poll(struct net_device *dev)
|
|
{
|
|
disable_irq(IRQ_MAC_RX);
|
|
bf537mac_interrupt(IRQ_MAC_RX, dev);
|
|
enable_irq(IRQ_MAC_RX);
|
|
}
|
|
#endif /* CONFIG_NET_POLL_CONTROLLER */
|
|
|
|
static void bf537mac_reset(void)
|
|
{
|
|
unsigned int opmode;
|
|
|
|
opmode = bfin_read_EMAC_OPMODE();
|
|
opmode &= (~RE);
|
|
opmode &= (~TE);
|
|
/* Turn off the EMAC */
|
|
bfin_write_EMAC_OPMODE(opmode);
|
|
}
|
|
|
|
/*
|
|
* Enable Interrupts, Receive, and Transmit
|
|
*/
|
|
static int bf537mac_enable(struct net_device *dev)
|
|
{
|
|
u32 opmode;
|
|
|
|
pr_debug("%s: %s\n", dev->name, __FUNCTION__);
|
|
|
|
/* Set RX DMA */
|
|
bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a));
|
|
bfin_write_DMA1_CONFIG(rx_list_head->desc_a.config);
|
|
|
|
/* Wait MII done */
|
|
poll_mdc_done();
|
|
|
|
/* We enable only RX here */
|
|
/* ASTP : Enable Automatic Pad Stripping
|
|
PR : Promiscuous Mode for test
|
|
PSF : Receive frames with total length less than 64 bytes.
|
|
FDMODE : Full Duplex Mode
|
|
LB : Internal Loopback for test
|
|
RE : Receiver Enable */
|
|
opmode = bfin_read_EMAC_OPMODE();
|
|
if (opmode & FDMODE)
|
|
opmode |= PSF;
|
|
else
|
|
opmode |= DRO | DC | PSF;
|
|
opmode |= RE;
|
|
|
|
#if defined(CONFIG_BFIN_MAC_RMII)
|
|
opmode |= RMII; /* For Now only 100MBit are supported */
|
|
#ifdef CONFIG_BF_REV_0_2
|
|
opmode |= TE;
|
|
#endif
|
|
#endif
|
|
/* Turn on the EMAC rx */
|
|
bfin_write_EMAC_OPMODE(opmode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Our watchdog timed out. Called by the networking layer */
|
|
static void bf537mac_timeout(struct net_device *dev)
|
|
{
|
|
pr_debug("%s: %s\n", dev->name, __FUNCTION__);
|
|
|
|
bf537mac_reset();
|
|
|
|
/* reset tx queue */
|
|
tx_list_tail = tx_list_head->next;
|
|
|
|
bf537mac_enable(dev);
|
|
|
|
/* We can accept TX packets again */
|
|
dev->trans_start = jiffies;
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
/*
|
|
* This routine will, depending on the values passed to it,
|
|
* either make it accept multicast packets, go into
|
|
* promiscuous mode (for TCPDUMP and cousins) or accept
|
|
* a select set of multicast packets
|
|
*/
|
|
static void bf537mac_set_multicast_list(struct net_device *dev)
|
|
{
|
|
u32 sysctl;
|
|
|
|
if (dev->flags & IFF_PROMISC) {
|
|
printk(KERN_INFO "%s: set to promisc mode\n", dev->name);
|
|
sysctl = bfin_read_EMAC_OPMODE();
|
|
sysctl |= RAF;
|
|
bfin_write_EMAC_OPMODE(sysctl);
|
|
} else if (dev->flags & IFF_ALLMULTI || dev->mc_count) {
|
|
/* accept all multicast */
|
|
sysctl = bfin_read_EMAC_OPMODE();
|
|
sysctl |= PAM;
|
|
bfin_write_EMAC_OPMODE(sysctl);
|
|
} else {
|
|
/* clear promisc or multicast mode */
|
|
sysctl = bfin_read_EMAC_OPMODE();
|
|
sysctl &= ~(RAF | PAM);
|
|
bfin_write_EMAC_OPMODE(sysctl);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* this puts the device in an inactive state
|
|
*/
|
|
static void bf537mac_shutdown(struct net_device *dev)
|
|
{
|
|
/* Turn off the EMAC */
|
|
bfin_write_EMAC_OPMODE(0x00000000);
|
|
/* Turn off the EMAC RX DMA */
|
|
bfin_write_DMA1_CONFIG(0x0000);
|
|
bfin_write_DMA2_CONFIG(0x0000);
|
|
}
|
|
|
|
/*
|
|
* Open and Initialize the interface
|
|
*
|
|
* Set up everything, reset the card, etc..
|
|
*/
|
|
static int bf537mac_open(struct net_device *dev)
|
|
{
|
|
int retval;
|
|
pr_debug("%s: %s\n", dev->name, __FUNCTION__);
|
|
|
|
/*
|
|
* Check that the address is valid. If its not, refuse
|
|
* to bring the device up. The user must specify an
|
|
* address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx
|
|
*/
|
|
if (!is_valid_ether_addr(dev->dev_addr)) {
|
|
printk(KERN_WARNING DRV_NAME ": no valid ethernet hw addr\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* initial rx and tx list */
|
|
retval = desc_list_init();
|
|
|
|
if (retval)
|
|
return retval;
|
|
|
|
bf537mac_setphy(dev);
|
|
setup_system_regs(dev);
|
|
bf537mac_reset();
|
|
bf537mac_enable(dev);
|
|
|
|
pr_debug("hardware init finished\n");
|
|
netif_start_queue(dev);
|
|
netif_carrier_on(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* this makes the board clean up everything that it can
|
|
* and not talk to the outside world. Caused by
|
|
* an 'ifconfig ethX down'
|
|
*/
|
|
static int bf537mac_close(struct net_device *dev)
|
|
{
|
|
pr_debug("%s: %s\n", dev->name, __FUNCTION__);
|
|
|
|
netif_stop_queue(dev);
|
|
netif_carrier_off(dev);
|
|
|
|
/* clear everything */
|
|
bf537mac_shutdown(dev);
|
|
|
|
/* free the rx/tx buffers */
|
|
desc_list_free();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init bf537mac_probe(struct net_device *dev)
|
|
{
|
|
struct bf537mac_local *lp = netdev_priv(dev);
|
|
int retval;
|
|
|
|
/* Grab the MAC address in the MAC */
|
|
*(__le32 *) (&(dev->dev_addr[0])) = cpu_to_le32(bfin_read_EMAC_ADDRLO());
|
|
*(__le16 *) (&(dev->dev_addr[4])) = cpu_to_le16((u16) bfin_read_EMAC_ADDRHI());
|
|
|
|
/* probe mac */
|
|
/*todo: how to proble? which is revision_register */
|
|
bfin_write_EMAC_ADDRLO(0x12345678);
|
|
if (bfin_read_EMAC_ADDRLO() != 0x12345678) {
|
|
pr_debug("can't detect bf537 mac!\n");
|
|
retval = -ENODEV;
|
|
goto err_out;
|
|
}
|
|
|
|
/* set the GPIO pins to Ethernet mode */
|
|
retval = setup_pin_mux(1);
|
|
|
|
if (retval)
|
|
return retval;
|
|
|
|
/*Is it valid? (Did bootloader initialize it?) */
|
|
if (!is_valid_ether_addr(dev->dev_addr)) {
|
|
/* Grab the MAC from the board somehow - this is done in the
|
|
arch/blackfin/mach-bf537/boards/eth_mac.c */
|
|
get_bf537_ether_addr(dev->dev_addr);
|
|
}
|
|
|
|
/* If still not valid, get a random one */
|
|
if (!is_valid_ether_addr(dev->dev_addr)) {
|
|
random_ether_addr(dev->dev_addr);
|
|
}
|
|
|
|
setup_mac_addr(dev->dev_addr);
|
|
|
|
/* Fill in the fields of the device structure with ethernet values. */
|
|
ether_setup(dev);
|
|
|
|
dev->open = bf537mac_open;
|
|
dev->stop = bf537mac_close;
|
|
dev->hard_start_xmit = bf537mac_hard_start_xmit;
|
|
dev->set_mac_address = bf537mac_set_mac_address;
|
|
dev->tx_timeout = bf537mac_timeout;
|
|
dev->set_multicast_list = bf537mac_set_multicast_list;
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
dev->poll_controller = bf537mac_poll;
|
|
#endif
|
|
|
|
/* fill in some of the fields */
|
|
lp->version = 1;
|
|
lp->PhyAddr = 0x01;
|
|
lp->CLKIN = 25;
|
|
lp->FullDuplex = 0;
|
|
lp->Negotiate = 1;
|
|
lp->FlowControl = 0;
|
|
spin_lock_init(&lp->lock);
|
|
|
|
/* now, enable interrupts */
|
|
/* register irq handler */
|
|
if (request_irq
|
|
(IRQ_MAC_RX, bf537mac_interrupt, IRQF_DISABLED | IRQF_SHARED,
|
|
"BFIN537_MAC_RX", dev)) {
|
|
printk(KERN_WARNING DRV_NAME
|
|
": Unable to attach BlackFin MAC RX interrupt\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* Enable PHY output early */
|
|
if (!(bfin_read_VR_CTL() & PHYCLKOE))
|
|
bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE);
|
|
|
|
retval = register_netdev(dev);
|
|
if (retval == 0) {
|
|
/* now, print out the card info, in a short format.. */
|
|
printk(KERN_INFO "%s: Version %s, %s\n",
|
|
DRV_NAME, DRV_VERSION, DRV_DESC);
|
|
}
|
|
|
|
err_out:
|
|
return retval;
|
|
}
|
|
|
|
static int bfin_mac_probe(struct platform_device *pdev)
|
|
{
|
|
struct net_device *ndev;
|
|
|
|
ndev = alloc_etherdev(sizeof(struct bf537mac_local));
|
|
if (!ndev) {
|
|
printk(KERN_WARNING DRV_NAME ": could not allocate device\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
SET_NETDEV_DEV(ndev, &pdev->dev);
|
|
|
|
platform_set_drvdata(pdev, ndev);
|
|
|
|
if (bf537mac_probe(ndev) != 0) {
|
|
platform_set_drvdata(pdev, NULL);
|
|
free_netdev(ndev);
|
|
printk(KERN_WARNING DRV_NAME ": not found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bfin_mac_remove(struct platform_device *pdev)
|
|
{
|
|
struct net_device *ndev = platform_get_drvdata(pdev);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
unregister_netdev(ndev);
|
|
|
|
free_irq(IRQ_MAC_RX, ndev);
|
|
|
|
free_netdev(ndev);
|
|
|
|
setup_pin_mux(0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int bfin_mac_resume(struct platform_device *pdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver bfin_mac_driver = {
|
|
.probe = bfin_mac_probe,
|
|
.remove = bfin_mac_remove,
|
|
.resume = bfin_mac_resume,
|
|
.suspend = bfin_mac_suspend,
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
},
|
|
};
|
|
|
|
static int __init bfin_mac_init(void)
|
|
{
|
|
return platform_driver_register(&bfin_mac_driver);
|
|
}
|
|
|
|
module_init(bfin_mac_init);
|
|
|
|
static void __exit bfin_mac_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&bfin_mac_driver);
|
|
}
|
|
|
|
module_exit(bfin_mac_cleanup);
|