| 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) |