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  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 int	de600_start_xmit(struct sk_buff *skb, struct net_device *dev);
125
126/* Dispatch from interrupts. */
127static irqreturn_t de600_interrupt(int irq, void *dev_id);
128static int	de600_tx_intr(struct net_device *dev, int irq_status);
129static void	de600_rx_intr(struct net_device *dev);
130
131/* Initialization */
132static void	trigger_interrupt(struct net_device *dev);
133static 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)