1 /* stnic.c : A SH7750 specific part of driver for NS DP83902A ST-NIC.
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
7 * Copyright (C) 1999 kaz Kojima
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/errno.h>
13 #include <linux/interrupt.h>
14 #include <linux/ioport.h>
15 #include <linux/netdevice.h>
16 #include <linux/etherdevice.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
20 #include <asm/system.h>
23 #include <asm/machvec.h>
24 #ifdef CONFIG_SH_STANDARD_BIOS
25 #include <asm/sh_bios.h>
30 #define DRV_NAME "stnic"
32 #define byte unsigned char
33 #define half unsigned short
34 #define word unsigned int
35 #define vbyte volatile unsigned char
36 #define vhalf volatile unsigned short
37 #define vword volatile unsigned int
39 #define STNIC_RUN 0x01 /* 1 == Run, 0 == reset. */
41 #define START_PG 0 /* First page of TX buffer */
42 #define STOP_PG 128 /* Last page +1 of RX ring */
45 #define STNIC_CR E8390_CMD
46 #define PG0_RSAR0 EN0_RSARLO
47 #define PG0_RSAR1 EN0_RSARHI
48 #define PG0_RBCR0 EN0_RCNTLO
49 #define PG0_RBCR1 EN0_RCNTHI
51 #define CR_RRD E8390_RREAD
52 #define CR_RWR E8390_RWRITE
53 #define CR_PG0 E8390_PAGE0
54 #define CR_STA E8390_START
55 #define CR_RDMA E8390_NODMA
57 /* FIXME! YOU MUST SET YOUR OWN ETHER ADDRESS. */
58 static byte stnic_eadr
[6] =
59 {0x00, 0xc0, 0x6e, 0x00, 0x00, 0x07};
61 static struct net_device
*stnic_dev
;
63 static int stnic_open (struct net_device
*dev
);
64 static int stnic_close (struct net_device
*dev
);
65 static void stnic_reset (struct net_device
*dev
);
66 static void stnic_get_hdr (struct net_device
*dev
, struct e8390_pkt_hdr
*hdr
,
68 static void stnic_block_input (struct net_device
*dev
, int count
,
69 struct sk_buff
*skb
, int ring_offset
);
70 static void stnic_block_output (struct net_device
*dev
, int count
,
71 const unsigned char *buf
, int start_page
);
73 static void stnic_init (struct net_device
*dev
);
75 /* SH7750 specific read/write io. */
80 trash
= *(vword
*) 0xa0000000;
81 trash
= *(vword
*) 0xa0000000;
82 trash
= *(vword
*) 0xa0000000;
90 val
= (*(vhalf
*) (PA_83902
+ ((reg
) << 1)) >> 8) & 0xff;
96 STNIC_WRITE (int reg
, byte val
)
98 *(vhalf
*) (PA_83902
+ ((reg
) << 1)) = ((half
) (val
) << 8);
102 static int __init
stnic_probe(void)
104 struct net_device
*dev
;
107 /* If we are not running on a SolutionEngine, give up now */
111 /* New style probing API */
112 dev
= alloc_ei_netdev();
116 #ifdef CONFIG_SH_STANDARD_BIOS
117 sh_bios_get_node_addr (stnic_eadr
);
119 for (i
= 0; i
< ETHER_ADDR_LEN
; i
++)
120 dev
->dev_addr
[i
] = stnic_eadr
[i
];
122 /* Set the base address to point to the NIC, not the "real" base! */
123 dev
->base_addr
= 0x1000;
124 dev
->irq
= IRQ_STNIC
;
125 dev
->open
= &stnic_open
;
126 dev
->stop
= &stnic_close
;
127 #ifdef CONFIG_NET_POLL_CONTROLLER
128 dev
->poll_controller
= ei_poll
;
131 /* Snarf the interrupt now. There's no point in waiting since we cannot
132 share and the board will usually be enabled. */
133 err
= request_irq (dev
->irq
, ei_interrupt
, 0, DRV_NAME
, dev
);
135 printk (KERN_EMERG
" unable to get IRQ %d.\n", dev
->irq
);
140 ei_status
.name
= dev
->name
;
141 ei_status
.word16
= 1;
142 #ifdef __LITTLE_ENDIAN__
143 ei_status
.bigendian
= 0;
145 ei_status
.bigendian
= 1;
147 ei_status
.tx_start_page
= START_PG
;
148 ei_status
.rx_start_page
= START_PG
+ TX_PAGES
;
149 ei_status
.stop_page
= STOP_PG
;
151 ei_status
.reset_8390
= &stnic_reset
;
152 ei_status
.get_8390_hdr
= &stnic_get_hdr
;
153 ei_status
.block_input
= &stnic_block_input
;
154 ei_status
.block_output
= &stnic_block_output
;
158 err
= register_netdev(dev
);
160 free_irq(dev
->irq
, dev
);
166 printk (KERN_INFO
"NS ST-NIC 83902A\n");
172 stnic_open (struct net_device
*dev
)
175 printk (KERN_DEBUG
"stnic open\n");
182 stnic_close (struct net_device
*dev
)
189 stnic_reset (struct net_device
*dev
)
191 *(vhalf
*) PA_83902_RST
= 0;
194 printk (KERN_WARNING
"8390 reset done (%ld).\n", jiffies
);
195 *(vhalf
*) PA_83902_RST
= ~0;
200 stnic_get_hdr (struct net_device
*dev
, struct e8390_pkt_hdr
*hdr
,
205 STNIC_WRITE (PG0_RSAR0
, 0);
206 STNIC_WRITE (PG0_RSAR1
, ring_page
);
207 STNIC_WRITE (PG0_RBCR0
, 4);
208 STNIC_WRITE (PG0_RBCR1
, 0);
209 STNIC_WRITE (STNIC_CR
, CR_RRD
| CR_PG0
| CR_STA
);
211 buf
[0] = *(vhalf
*) PA_83902_IF
;
213 buf
[1] = *(vhalf
*) PA_83902_IF
;
215 hdr
->next
= buf
[0] >> 8;
216 hdr
->status
= buf
[0] & 0xff;
217 #ifdef __LITTLE_ENDIAN__
220 hdr
->count
= ((buf
[1] >> 8) & 0xff) | (buf
[1] << 8);
224 printk (KERN_DEBUG
"ring %x status %02x next %02x count %04x.\n",
225 ring_page
, hdr
->status
, hdr
->next
, hdr
->count
);
227 STNIC_WRITE (STNIC_CR
, CR_RDMA
| CR_PG0
| CR_STA
);
230 /* Block input and output, similar to the Crynwr packet driver. If you are
231 porting to a new ethercard look at the packet driver source for hints.
232 The HP LAN doesn't use shared memory -- we put the packet
233 out through the "remote DMA" dataport. */
236 stnic_block_input (struct net_device
*dev
, int length
, struct sk_buff
*skb
,
239 char *buf
= skb
->data
;
242 STNIC_WRITE (PG0_RSAR0
, offset
& 0xff);
243 STNIC_WRITE (PG0_RSAR1
, offset
>> 8);
244 STNIC_WRITE (PG0_RBCR0
, length
& 0xff);
245 STNIC_WRITE (PG0_RBCR1
, length
>> 8);
246 STNIC_WRITE (STNIC_CR
, CR_RRD
| CR_PG0
| CR_STA
);
253 val
= *(vhalf
*) PA_83902_IF
;
254 #ifdef __LITTLE_ENDIAN__
262 length
-= sizeof (half
);
265 STNIC_WRITE (STNIC_CR
, CR_RDMA
| CR_PG0
| CR_STA
);
269 stnic_block_output (struct net_device
*dev
, int length
,
270 const unsigned char *buf
, int output_page
)
272 STNIC_WRITE (PG0_RBCR0
, 1); /* Write non-zero value */
273 STNIC_WRITE (STNIC_CR
, CR_RRD
| CR_PG0
| CR_STA
);
276 STNIC_WRITE (PG0_RBCR0
, length
& 0xff);
277 STNIC_WRITE (PG0_RBCR1
, length
>> 8);
278 STNIC_WRITE (PG0_RSAR0
, 0);
279 STNIC_WRITE (PG0_RSAR1
, output_page
);
280 STNIC_WRITE (STNIC_CR
, CR_RWR
| CR_PG0
| CR_STA
);
287 #ifdef __LITTLE_ENDIAN__
288 *(vhalf
*) PA_83902_IF
= ((half
) buf
[1] << 8) | buf
[0];
290 *(vhalf
*) PA_83902_IF
= ((half
) buf
[0] << 8) | buf
[1];
293 buf
+= sizeof (half
);
294 length
-= sizeof (half
);
297 STNIC_WRITE (STNIC_CR
, CR_RDMA
| CR_PG0
| CR_STA
);
300 /* This function resets the STNIC if something screws up. */
302 stnic_init (struct net_device
*dev
)
305 NS8390_init (dev
, 0);
309 static void __exit
stnic_cleanup(void)
311 unregister_netdev(stnic_dev
);
312 free_irq(stnic_dev
->irq
, stnic_dev
);
313 free_netdev(stnic_dev
);
316 module_init(stnic_probe
);
317 module_exit(stnic_cleanup
);
318 MODULE_LICENSE("GPL");
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