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") */
 118 static u8       de600_read_status(struct net_device *dev);
 119 static u8       de600_read_byte(unsigned char type, struct net_device *dev);
 120
 121 /* Put in the device structure. */
 122 static int      de600_open(struct net_device *dev);
 123 static int      de600_close(struct net_device *dev);
 124 static int      de600_start_xmit(struct sk_buff *skb, struct net_device *dev);
 125
 126 /* Dispatch from interrupts. */
 127 static irqreturn_t de600_interrupt(int irq, void *dev_id);
 128 static int      de600_tx_intr(struct net_device *dev, int irq_status);
 129 static void     de600_rx_intr(struct net_device *dev);
 130
 131 /* Initialization */
 132 static void     trigger_interrupt(struct net_device *dev);
 133 static int      adapter_init(struct net_device *dev);
 134
 135 /*
 136  * Convenience macros/functions for D-Link adapter
 137  */
 138
 139 #define select_prn() outb_p(SELECT_PRN, COMMAND_PORT); DE600_SLOW_DOWN
 140 #define select_nic() outb_p(SELECT_NIC, COMMAND_PORT); DE600_SLOW_DOWN
 141
 142 /* Thanks for hints from Mark Burton <markb@ordern.demon.co.uk> */
 143 #define de600_put_byte(data) ( \
 144         outb_p(((data) << 4)   | WRITE_DATA            , DATA_PORT), \
 145         outb_p(((data) & 0xf0) | WRITE_DATA | HI_NIBBLE, DATA_PORT))
 146
 147 /*
 148  * The first two outb_p()'s below could perhaps be deleted if there
 149  * would be more delay in the last two. Not certain about it yet...
 150  */
 151 #define de600_put_command(cmd) ( \
 152         outb_p(( rx_page        << 4)   | COMMAND            , DATA_PORT), \
 153         outb_p(( rx_page        & 0xf0) | COMMAND | HI_NIBBLE, DATA_PORT), \
 154         outb_p(((rx_page | cmd) << 4)   | COMMAND            , DATA_PORT), \
 155         outb_p(((rx_page | cmd) & 0xf0) | COMMAND | HI_NIBBLE, DATA_PORT))
 156
 157 #define de600_setup_address(addr,type) ( \
 158         outb_p((((addr) << 4) & 0xf0) | type            , DATA_PORT), \
 159         outb_p(( (addr)       & 0xf0) | type | HI_NIBBLE, DATA_PORT), \
 160         outb_p((((addr) >> 4) & 0xf0) | type            , DATA_PORT), \
 161         outb_p((((addr) >> 8) & 0xf0) | type | HI_NIBBLE, DATA_PORT))
 162
 163 #define rx_page_adr() ((rx_page & RX_PAGE2_SELECT)?(MEM_6K):(MEM_4K))
 164
 165 /* Flip bit, only 2 pages */
 166 #define next_rx_page() (rx_page ^= RX_PAGE2_SELECT)
 167
 168 #define tx_page_adr(a) (((a) + 1) * MEM_2K)