179 lines
6 KiB
C
179 lines
6 KiB
C
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/**************************************************************************
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*
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* BRIEF MODULE DESCRIPTION
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* Definitions for IDT RC32434 on-chip ethernet controller.
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*
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* Copyright 2004 IDT Inc. (rischelp@idt.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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**************************************************************************
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* May 2004 rkt, neb
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*
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* Initial Release
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*
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* Aug 2004
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*
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* Added NAPI
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*
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**************************************************************************
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*/
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#include <asm/rc32434/rc32434.h>
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#include <asm/rc32434/dma_v.h>
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#include <asm/rc32434/eth_v.h>
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#define CONFIG_IDT_USE_NAPI 1
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#define RC32434_DEBUG 2
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//#define RC32434_PROC_DEBUG
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#undef RC32434_DEBUG
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#ifdef RC32434_DEBUG
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/* use 0 for production, 1 for verification, >2 for debug */
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static int rc32434_debug = RC32434_DEBUG;
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#define ASSERT(expr) \
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if(!(expr)) { \
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printk( "Assertion failed! %s,%s,%s,line=%d\n", \
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#expr,__FILE__,__FUNCTION__,__LINE__); }
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#define DBG(lvl, format, arg...) if (rc32434_debug > lvl) printk(KERN_INFO "%s: " format, dev->name , ## arg)
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#else
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#define ASSERT(expr) do {} while (0)
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#define DBG(lvl, format, arg...) do {} while (0)
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#endif
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#define INFO(format, arg...) printk(KERN_INFO "%s: " format, dev->name , ## arg)
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#define ERR(format, arg...) printk(KERN_ERR "%s: " format, dev->name , ## arg)
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#define WARN(format, arg...) printk(KERN_WARNING "%s: " format, dev->name , ## arg)
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/* the following must be powers of two */
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#ifdef CONFIG_IDT_USE_NAPI
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#define RC32434_NUM_RDS 64 /* number of receive descriptors */
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#define RC32434_NUM_TDS 64 /* number of transmit descriptors */
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#else
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#define RC32434_NUM_RDS 128 /* number of receive descriptors */
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#define RC32434_NUM_TDS 128 /* number of transmit descriptors */
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#endif
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#define RC32434_RBSIZE 1536 /* size of one resource buffer = Ether MTU */
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#define RC32434_RDS_MASK (RC32434_NUM_RDS-1)
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#define RC32434_TDS_MASK (RC32434_NUM_TDS-1)
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#define RD_RING_SIZE (RC32434_NUM_RDS * sizeof(struct DMAD_s))
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#define TD_RING_SIZE (RC32434_NUM_TDS * sizeof(struct DMAD_s))
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#define RC32434_TX_TIMEOUT HZ * 100
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#define rc32434_eth0_regs ((ETH_t)(ETH0_VirtualAddress))
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#define rc32434_eth1_regs ((ETH_t)(ETH1_VirtualAddress))
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enum status { filled, empty};
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#define IS_DMA_FINISHED(X) (((X) & (DMAD_f_m)) != 0)
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#define IS_DMA_DONE(X) (((X) & (DMAD_d_m)) != 0)
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/* Information that need to be kept for each board. */
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struct rc32434_local {
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ETH_t eth_regs;
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DMA_Chan_t rx_dma_regs;
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DMA_Chan_t tx_dma_regs;
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volatile DMAD_t td_ring; /* transmit descriptor ring */
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volatile DMAD_t rd_ring; /* receive descriptor ring */
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struct sk_buff* tx_skb[RC32434_NUM_TDS]; /* skbuffs for pkt to trans */
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struct sk_buff* rx_skb[RC32434_NUM_RDS]; /* skbuffs for pkt to trans */
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#ifndef CONFIG_IDT_USE_NAPI
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struct tasklet_struct * rx_tasklet;
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#endif
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struct tasklet_struct * tx_tasklet;
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int rx_next_done;
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int rx_chain_head;
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int rx_chain_tail;
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enum status rx_chain_status;
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int tx_next_done;
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int tx_chain_head;
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int tx_chain_tail;
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enum status tx_chain_status;
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int tx_count;
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int tx_full;
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struct timer_list mii_phy_timer;
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unsigned long duplex_mode;
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int rx_irq;
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int tx_irq;
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int ovr_irq;
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int und_irq;
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struct net_device_stats stats;
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spinlock_t lock;
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/* debug /proc entry */
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struct proc_dir_entry *ps;
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int dma_halt_cnt; int dma_run_cnt;
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};
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extern unsigned int idt_cpu_freq;
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/* Index to functions, as function prototypes. */
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static int rc32434_open(struct net_device *dev);
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static int rc32434_send_packet(struct sk_buff *skb, struct net_device *dev);
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static void rc32434_mii_handler(unsigned long data);
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static irqreturn_t rc32434_und_interrupt(int irq, void *dev_id);
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static irqreturn_t rc32434_rx_dma_interrupt(int irq, void *dev_id);
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static irqreturn_t rc32434_tx_dma_interrupt(int irq, void *dev_id);
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#ifdef RC32434_REVISION
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static irqreturn_t rc32434_ovr_interrupt(int irq, void *dev_id);
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#endif
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static int rc32434_close(struct net_device *dev);
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static struct net_device_stats *rc32434_get_stats(struct net_device *dev);
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static void rc32434_multicast_list(struct net_device *dev);
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static int rc32434_init(struct net_device *dev);
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static void rc32434_tx_timeout(struct net_device *dev);
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static void rc32434_tx_tasklet(unsigned long tx_data_dev);
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#ifdef CONFIG_IDT_USE_NAPI
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static int rc32434_poll(struct net_device *rx_data_dev, int *budget);
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#else
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static void rc32434_rx_tasklet(unsigned long rx_data_dev);
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#endif
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static void rc32434_cleanup_module(void);
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static inline void rc32434_abort_dma(struct net_device *dev, DMA_Chan_t ch)
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{
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if (__raw_readl(&ch->dmac) & DMAC_run_m) {
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__raw_writel(0x10, &ch->dmac);
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while (!(__raw_readl(&ch->dmas) & DMAS_h_m))
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dev->trans_start = jiffies;
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__raw_writel(0, &ch->dmas);
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}
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__raw_writel(0, &ch->dmadptr);
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__raw_writel(0, &ch->dmandptr);
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}
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