LXR linux-bk/drivers/net/de600.h

   1/**************************************************
   2 *                                                *
   3 * Definition of D-Link Ethernet Pocket adapter   *
   4 *                                                *
   5 **************************************************/
   6/*
   7 * D-Link Ethernet pocket adapter ports
   8 */
   9/*
  10 * OK, so I'm cheating, but there are an awful lot of
  11 * reads and writes in order to get anything in and out
  12 * of the DE-600 with 4 bits at a time in the parallel port,
  13 * so every saved instruction really helps :-)
  14 */
  15
  16#ifndef DE600_IO
  17#define DE600_IO        0x378
  18#endif
  19
  20#define DATA_PORT       (DE600_IO)
  21#define STATUS_PORT     (DE600_IO + 1)
  22#define COMMAND_PORT    (DE600_IO + 2)
  23
  24#ifndef DE600_IRQ
  25#define DE600_IRQ       7
  26#endif
  27/*
  28 * It really should look like this, and autoprobing as well...
  29 *
  30#define DATA_PORT       (dev->base_addr + 0)
  31#define STATUS_PORT     (dev->base_addr + 1)
  32#define COMMAND_PORT    (dev->base_addr + 2)
  33#define DE600_IRQ       dev->irq
  34 */
  35
  36/*
  37 * D-Link COMMAND_PORT commands
  38 */
  39#define SELECT_NIC      0x04 /* select Network Interface Card */
  40#define SELECT_PRN      0x1c /* select Printer */
  41#define NML_PRN         0xec /* normal Printer situation */
  42#define IRQEN           0x10 /* enable IRQ line */
  43
  44/*
  45 * D-Link STATUS_PORT
  46 */
  47#define RX_BUSY         0x80
  48#define RX_GOOD         0x40
  49#define TX_FAILED16     0x10
  50#define TX_BUSY         0x08
  51
  52/*
  53 * D-Link DATA_PORT commands
  54 * command in low 4 bits
  55 * data in high 4 bits
  56 * select current data nibble with HI_NIBBLE bit
  57 */
  58#define WRITE_DATA      0x00 /* write memory */
  59#define READ_DATA       0x01 /* read memory */
  60#define STATUS          0x02 /* read  status register */
  61#define COMMAND         0x03 /* write command register (see COMMAND below) */
  62#define NULL_COMMAND    0x04 /* null command */
  63#define RX_LEN          0x05 /* read  received packet length */
  64#define TX_ADDR         0x06 /* set adapter transmit memory address */
  65#define RW_ADDR         0x07 /* set adapter read/write memory address */
  66#define HI_NIBBLE       0x08 /* read/write the high nibble of data,
  67                                or-ed with rest of command */
  68
  69/*
  70 * command register, accessed through DATA_PORT with low bits = COMMAND
  71 */
  72#define RX_ALL          0x01 /* PROMISCUOUS */
  73#define RX_BP           0x02 /* default: BROADCAST & PHYSICAL ADDRESS */
  74#define RX_MBP          0x03 /* MULTICAST, BROADCAST & PHYSICAL ADDRESS */
  75
  76#define TX_ENABLE       0x04 /* bit 2 */
  77#define RX_ENABLE       0x08 /* bit 3 */
  78
  79#define RESET           0x80 /* set bit 7 high */
  80#define STOP_RESET      0x00 /* set bit 7 low */
  81
  82/*
  83 * data to command register
  84 * (high 4 bits in write to DATA_PORT)
  85 */
  86#define RX_PAGE2_SELECT 0x10 /* bit 4, only 2 pages to select */
  87#define RX_BASE_PAGE    0x20 /* bit 5, always set when specifying RX_ADDR */
  88#define FLIP_IRQ        0x40 /* bit 6 */
  89
  90/*
  91 * D-Link adapter internal memory:
  92 *
  93 * 0-2K 1:st transmit page (send from pointer up to 2K)
  94 * 2-4K 2:nd transmit page (send from pointer up to 4K)
  95 *
  96 * 4-6K 1:st receive page (data from 4K upwards)
  97 * 6-8K 2:nd receive page (data from 6K upwards)
  98 *
  99 * 8K+  Adapter ROM (contains magic code and last 3 bytes of Ethernet address)
 100 */
 101#define MEM_2K          0x0800 /* 2048 */
 102#define MEM_4K          0x1000 /* 4096 */
 103#define MEM_6K          0x1800 /* 6144 */
 104#define NODE_ADDRESS    0x2000 /* 8192 */
 105
 106#define RUNT 60         /* Too small Ethernet packet */
 107
 108/**************************************************
 109 *                                                *
 110 *             End of definition                  *
 111 *                                                *
 112 **************************************************/
 113
 114/*
 115 * Index to functions, as function prototypes.
 116 */
 117/* Routines used internally. (See "convenience macros") */
 118static u8       de600_read_status(struct net_device *dev);
 119static u8       de600_read_byte(unsigned char type, struct net_device *dev);
 120
 121/* Put in the device structure. */
 122static int      de600_open(struct net_device *dev);
 123static int      de600_close(struct net_device *dev);
 124static struct net_device_stats *get_stats(struct net_device *dev);
 125static int      de600_start_xmit(struct sk_buff *skb, struct net_device *dev);
 126
 127/* Dispatch from interrupts. */
 128static irqreturn_t de600_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 129static int      de600_tx_intr(struct net_device *dev, int irq_status);
 130static void     de600_rx_intr(struct net_device *dev);
 131
 132/* Initialization */
 133static void     trigger_interrupt(struct net_device *dev);
 134int             de600_probe(struct net_device *dev);
 135static int      adapter_init(struct net_device *dev);
 136
 137/*
 138 * Convenience macros/functions for D-Link adapter
 139 */
 140
 141#define select_prn() outb_p(SELECT_PRN, COMMAND_PORT); DE600_SLOW_DOWN
 142#define select_nic() outb_p(SELECT_NIC, COMMAND_PORT); DE600_SLOW_DOWN
 143
 144/* Thanks for hints from Mark Burton <markb@ordern.demon.co.uk> */
 145#define de600_put_byte(data) ( \
 146        outb_p(((data) << 4)   | WRITE_DATA            , DATA_PORT), \
 147        outb_p(((data) & 0xf0) | WRITE_DATA | HI_NIBBLE, DATA_PORT))
 148
 149/*
 150 * The first two outb_p()'s below could perhaps be deleted if there
 151 * would be more delay in the last two. Not certain about it yet...
 152 */
 153#define de600_put_command(cmd) ( \
 154        outb_p(( rx_page        << 4)   | COMMAND            , DATA_PORT), \
 155        outb_p(( rx_page        & 0xf0) | COMMAND | HI_NIBBLE, DATA_PORT), \
 156        outb_p(((rx_page | cmd) << 4)   | COMMAND            , DATA_PORT), \
 157        outb_p(((rx_page | cmd) & 0xf0) | COMMAND | HI_NIBBLE, DATA_PORT))
 158
 159#define de600_setup_address(addr,type) ( \
 160        outb_p((((addr) << 4) & 0xf0) | type            , DATA_PORT), \
 161        outb_p(( (addr)       & 0xf0) | type | HI_NIBBLE, DATA_PORT), \
 162        outb_p((((addr) >> 4) & 0xf0) | type            , DATA_PORT), \
 163        outb_p((((addr) >> 8) & 0xf0) | type | HI_NIBBLE, DATA_PORT))
 164
 165#define rx_page_adr() ((rx_page & RX_PAGE2_SELECT)?(MEM_6K):(MEM_4K))
 166
 167/* Flip bit, only 2 pages */
 168#define next_rx_page() (rx_page ^= RX_PAGE2_SELECT)
 169
 170#define tx_page_adr(a) (((a) + 1) * MEM_2K)
 171