169 lines
5.5 KiB
C
169 lines
5.5 KiB
C
/**************************************************
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* *
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* Definition of D-Link Ethernet Pocket adapter *
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* *
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**************************************************/
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/*
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* D-Link Ethernet pocket adapter ports
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*/
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/*
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* OK, so I'm cheating, but there are an awful lot of
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* reads and writes in order to get anything in and out
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* of the DE-600 with 4 bits at a time in the parallel port,
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* so every saved instruction really helps :-)
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*/
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#ifndef DE600_IO
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#define DE600_IO 0x378
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#endif
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#define DATA_PORT (DE600_IO)
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#define STATUS_PORT (DE600_IO + 1)
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#define COMMAND_PORT (DE600_IO + 2)
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#ifndef DE600_IRQ
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#define DE600_IRQ 7
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#endif
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/*
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* It really should look like this, and autoprobing as well...
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*
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#define DATA_PORT (dev->base_addr + 0)
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#define STATUS_PORT (dev->base_addr + 1)
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#define COMMAND_PORT (dev->base_addr + 2)
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#define DE600_IRQ dev->irq
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*/
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/*
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* D-Link COMMAND_PORT commands
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*/
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#define SELECT_NIC 0x04 /* select Network Interface Card */
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#define SELECT_PRN 0x1c /* select Printer */
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#define NML_PRN 0xec /* normal Printer situation */
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#define IRQEN 0x10 /* enable IRQ line */
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/*
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* D-Link STATUS_PORT
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*/
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#define RX_BUSY 0x80
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#define RX_GOOD 0x40
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#define TX_FAILED16 0x10
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#define TX_BUSY 0x08
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/*
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* D-Link DATA_PORT commands
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* command in low 4 bits
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* data in high 4 bits
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* select current data nibble with HI_NIBBLE bit
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*/
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#define WRITE_DATA 0x00 /* write memory */
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#define READ_DATA 0x01 /* read memory */
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#define STATUS 0x02 /* read status register */
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#define COMMAND 0x03 /* write command register (see COMMAND below) */
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#define NULL_COMMAND 0x04 /* null command */
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#define RX_LEN 0x05 /* read received packet length */
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#define TX_ADDR 0x06 /* set adapter transmit memory address */
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#define RW_ADDR 0x07 /* set adapter read/write memory address */
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#define HI_NIBBLE 0x08 /* read/write the high nibble of data,
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or-ed with rest of command */
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/*
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* command register, accessed through DATA_PORT with low bits = COMMAND
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*/
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#define RX_ALL 0x01 /* PROMISCUOUS */
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#define RX_BP 0x02 /* default: BROADCAST & PHYSICAL ADDRESS */
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#define RX_MBP 0x03 /* MULTICAST, BROADCAST & PHYSICAL ADDRESS */
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#define TX_ENABLE 0x04 /* bit 2 */
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#define RX_ENABLE 0x08 /* bit 3 */
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#define RESET 0x80 /* set bit 7 high */
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#define STOP_RESET 0x00 /* set bit 7 low */
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/*
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* data to command register
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* (high 4 bits in write to DATA_PORT)
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*/
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#define RX_PAGE2_SELECT 0x10 /* bit 4, only 2 pages to select */
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#define RX_BASE_PAGE 0x20 /* bit 5, always set when specifying RX_ADDR */
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#define FLIP_IRQ 0x40 /* bit 6 */
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/*
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* D-Link adapter internal memory:
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*
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* 0-2K 1:st transmit page (send from pointer up to 2K)
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* 2-4K 2:nd transmit page (send from pointer up to 4K)
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*
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* 4-6K 1:st receive page (data from 4K upwards)
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* 6-8K 2:nd receive page (data from 6K upwards)
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*
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* 8K+ Adapter ROM (contains magic code and last 3 bytes of Ethernet address)
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*/
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#define MEM_2K 0x0800 /* 2048 */
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#define MEM_4K 0x1000 /* 4096 */
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#define MEM_6K 0x1800 /* 6144 */
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#define NODE_ADDRESS 0x2000 /* 8192 */
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#define RUNT 60 /* Too small Ethernet packet */
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/**************************************************
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* *
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* End of definition *
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* *
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**************************************************/
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/*
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* Index to functions, as function prototypes.
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*/
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/* Routines used internally. (See "convenience macros") */
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static u8 de600_read_status(struct net_device *dev);
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static u8 de600_read_byte(unsigned char type, struct net_device *dev);
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/* Put in the device structure. */
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static int de600_open(struct net_device *dev);
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static int de600_close(struct net_device *dev);
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static int de600_start_xmit(struct sk_buff *skb, struct net_device *dev);
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/* Dispatch from interrupts. */
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static irqreturn_t de600_interrupt(int irq, void *dev_id);
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static int de600_tx_intr(struct net_device *dev, int irq_status);
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static void de600_rx_intr(struct net_device *dev);
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/* Initialization */
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static void trigger_interrupt(struct net_device *dev);
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static int adapter_init(struct net_device *dev);
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/*
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* Convenience macros/functions for D-Link adapter
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*/
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#define select_prn() outb_p(SELECT_PRN, COMMAND_PORT); DE600_SLOW_DOWN
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#define select_nic() outb_p(SELECT_NIC, COMMAND_PORT); DE600_SLOW_DOWN
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/* Thanks for hints from Mark Burton <markb@ordern.demon.co.uk> */
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#define de600_put_byte(data) ( \
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outb_p(((data) << 4) | WRITE_DATA , DATA_PORT), \
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outb_p(((data) & 0xf0) | WRITE_DATA | HI_NIBBLE, DATA_PORT))
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/*
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* The first two outb_p()'s below could perhaps be deleted if there
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* would be more delay in the last two. Not certain about it yet...
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*/
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#define de600_put_command(cmd) ( \
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outb_p(( rx_page << 4) | COMMAND , DATA_PORT), \
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outb_p(( rx_page & 0xf0) | COMMAND | HI_NIBBLE, DATA_PORT), \
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outb_p(((rx_page | cmd) << 4) | COMMAND , DATA_PORT), \
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outb_p(((rx_page | cmd) & 0xf0) | COMMAND | HI_NIBBLE, DATA_PORT))
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#define de600_setup_address(addr,type) ( \
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outb_p((((addr) << 4) & 0xf0) | type , DATA_PORT), \
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outb_p(( (addr) & 0xf0) | type | HI_NIBBLE, DATA_PORT), \
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outb_p((((addr) >> 4) & 0xf0) | type , DATA_PORT), \
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outb_p((((addr) >> 8) & 0xf0) | type | HI_NIBBLE, DATA_PORT))
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#define rx_page_adr() ((rx_page & RX_PAGE2_SELECT)?(MEM_6K):(MEM_4K))
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/* Flip bit, only 2 pages */
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#define next_rx_page() (rx_page ^= RX_PAGE2_SELECT)
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#define tx_page_adr(a) (((a) + 1) * MEM_2K)
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