target/linux/rb532/files/drivers/net/rc32434_eth.h

   1 /**************************************************************************
   2  *
   3  *  BRIEF MODULE DESCRIPTION
   4  *     Definitions for IDT RC32434 on-chip ethernet controller.
   5  *
   6  *  Copyright 2004 IDT Inc. (rischelp@idt.com)
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  14  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  15  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  16  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  17  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  19  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  20  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  21  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  *
  24  *  You should have received a copy of the  GNU General Public License along
  25  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  26  *  675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  *
  29  **************************************************************************
  30  * May 2004 rkt, neb
  31  *
  32  * Initial Release
  33  *
  34  * Aug 2004
  35  *
  36  * Added NAPI
  37  *
  38  **************************************************************************
  39  */
  40
  41
  42 #include  <asm/rc32434/rc32434.h>
  43 #include  <asm/rc32434/dma_v.h>
  44 #include  <asm/rc32434/eth_v.h>
  45
  46 #define CONFIG_IDT_USE_NAPI 1
  47 #define RC32434_DEBUG   2
  48 //#define RC32434_PROC_DEBUG
  49 #undef  RC32434_DEBUG
  50
  51 #ifdef RC32434_DEBUG
  52
  53 /* use 0 for production, 1 for verification, >2 for debug */
  54 static int rc32434_debug = RC32434_DEBUG;
  55 #define ASSERT(expr) \
  56         if(!(expr)) {   \
  57                 printk( "Assertion failed! %s,%s,%s,line=%d\n", \
  58                 #expr,__FILE__,__FUNCTION__,__LINE__);          }
  59 #define DBG(lvl, format, arg...) if (rc32434_debug > lvl) printk(KERN_INFO "%s: " format, dev->name , ## arg)
  60 #else
  61 #define ASSERT(expr) do {} while (0)
  62 #define DBG(lvl, format, arg...) do {} while (0)
  63 #endif
  64
  65 #define INFO(format, arg...) printk(KERN_INFO "%s: " format, dev->name , ## arg)
  66 #define ERR(format, arg...) printk(KERN_ERR "%s: " format, dev->name , ## arg)
  67 #define WARN(format, arg...) printk(KERN_WARNING "%s: " format, dev->name , ## arg)
  68
  69 /* the following must be powers of two */
  70 #ifdef CONFIG_IDT_USE_NAPI
  71 #define RC32434_NUM_RDS    64                   /* number of receive descriptors */
  72 #define RC32434_NUM_TDS    64                   /* number of transmit descriptors */
  73 #else
  74 #define RC32434_NUM_RDS    128                  /* number of receive descriptors */
  75 #define RC32434_NUM_TDS    128                  /* number of transmit descriptors */
  76 #endif
  77
  78 #define RC32434_RBSIZE     1536                 /* size of one resource buffer = Ether MTU */
  79 #define RC32434_RDS_MASK   (RC32434_NUM_RDS-1)
  80 #define RC32434_TDS_MASK   (RC32434_NUM_TDS-1)
  81 #define RD_RING_SIZE (RC32434_NUM_RDS * sizeof(struct DMAD_s))
  82 #define TD_RING_SIZE (RC32434_NUM_TDS * sizeof(struct DMAD_s))
  83
  84 #define RC32434_TX_TIMEOUT HZ * 100
  85
  86 #define rc32434_eth0_regs ((ETH_t)(ETH0_VirtualAddress))
  87 #define rc32434_eth1_regs ((ETH_t)(ETH1_VirtualAddress))
  88
  89 enum status     { filled,       empty};
  90 #define IS_DMA_FINISHED(X)   (((X) & (DMAD_f_m)) != 0)
  91 #define IS_DMA_DONE(X)   (((X) & (DMAD_d_m)) != 0)
  92
  93
  94 /* Information that need to be kept for each board. */
  95 struct rc32434_local {
  96         ETH_t  eth_regs;
  97         DMA_Chan_t  rx_dma_regs;
  98         DMA_Chan_t  tx_dma_regs;
  99         volatile DMAD_t   td_ring;                      /* transmit descriptor ring */
 100         volatile DMAD_t   rd_ring;                      /* receive descriptor ring  */
 101
 102         struct sk_buff* tx_skb[RC32434_NUM_TDS];        /* skbuffs for pkt to trans */
 103         struct sk_buff* rx_skb[RC32434_NUM_RDS];        /* skbuffs for pkt to trans */
 104
 105         struct tasklet_struct * tx_tasklet;
 106
 107         int     rx_next_done;
 108         int     rx_chain_head;
 109         int     rx_chain_tail;
 110         enum status     rx_chain_status;
 111
 112         int     tx_next_done;
 113         int     tx_chain_head;
 114         int     tx_chain_tail;
 115         enum status     tx_chain_status;
 116         int tx_count;
 117         int     tx_full;
 118
 119         struct timer_list    mii_phy_timer;
 120         unsigned long duplex_mode;
 121
 122         int     rx_irq;
 123         int    tx_irq;
 124         int    ovr_irq;
 125         int    und_irq;
 126
 127         struct net_device_stats stats;
 128         spinlock_t lock;
 129
 130         /* debug /proc entry */
 131         struct proc_dir_entry *ps;
 132         int dma_halt_cnt;  int dma_run_cnt;
 133         struct napi_struct napi;
 134         struct net_device *dev;
 135 };
 136
 137 extern unsigned int idt_cpu_freq;
 138
 139 /* Index to functions, as function prototypes. */
 140 static int rc32434_open(struct net_device *dev);
 141 static int rc32434_send_packet(struct sk_buff *skb, struct net_device *dev);
 142 static void rc32434_mii_handler(unsigned long data);
 143 static irqreturn_t  rc32434_und_interrupt(int irq, void *dev_id);
 144 static irqreturn_t rc32434_rx_dma_interrupt(int irq, void *dev_id);
 145 static irqreturn_t rc32434_tx_dma_interrupt(int irq, void *dev_id);
 146 #ifdef  RC32434_REVISION
 147 static irqreturn_t rc32434_ovr_interrupt(int irq, void *dev_id);
 148 #endif
 149 static int  rc32434_close(struct net_device *dev);
 150 static struct net_device_stats *rc32434_get_stats(struct net_device *dev);
 151 static void rc32434_multicast_list(struct net_device *dev);
 152 static int  rc32434_init(struct net_device *dev);
 153 static void rc32434_tx_timeout(struct net_device *dev);
 154
 155 static void rc32434_tx_tasklet(unsigned long tx_data_dev);
 156 static int rc32434_poll(struct napi_struct *napi, int budget);
 157 static void rc32434_cleanup_module(void);
 158
 159
 160 static inline void rc32434_abort_dma(struct net_device *dev, DMA_Chan_t ch)
 161 {
 162         if (__raw_readl(&ch->dmac) & DMAC_run_m) {
 163                 __raw_writel(0x10, &ch->dmac);
 164
 165                 while (!(__raw_readl(&ch->dmas) & DMAS_h_m))
 166                         dev->trans_start = jiffies;
 167
 168                 __raw_writel(0, &ch->dmas);
 169         }
 170
 171         __raw_writel(0, &ch->dmadptr);
 172         __raw_writel(0, &ch->dmandptr);
 173 }