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>
22 #include <mach-se/mach/se.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 void stnic_reset (struct net_device
*dev
);
64 static void stnic_get_hdr (struct net_device
*dev
, struct e8390_pkt_hdr
*hdr
,
66 static void stnic_block_input (struct net_device
*dev
, int count
,
67 struct sk_buff
*skb
, int ring_offset
);
68 static void stnic_block_output (struct net_device
*dev
, int count
,
69 const unsigned char *buf
, int start_page
);
71 static void stnic_init (struct net_device
*dev
);
73 /* SH7750 specific read/write io. */
78 trash
= *(vword
*) 0xa0000000;
79 trash
= *(vword
*) 0xa0000000;
80 trash
= *(vword
*) 0xa0000000;
88 val
= (*(vhalf
*) (PA_83902
+ ((reg
) << 1)) >> 8) & 0xff;
94 STNIC_WRITE (int reg
, byte val
)
96 *(vhalf
*) (PA_83902
+ ((reg
) << 1)) = ((half
) (val
) << 8);
100 static int __init
stnic_probe(void)
102 struct net_device
*dev
;
105 /* If we are not running on a SolutionEngine, give up now */
109 /* New style probing API */
110 dev
= alloc_ei_netdev();
114 #ifdef CONFIG_SH_STANDARD_BIOS
115 sh_bios_get_node_addr (stnic_eadr
);
117 for (i
= 0; i
< ETHER_ADDR_LEN
; i
++)
118 dev
->dev_addr
[i
] = stnic_eadr
[i
];
120 /* Set the base address to point to the NIC, not the "real" base! */
121 dev
->base_addr
= 0x1000;
122 dev
->irq
= IRQ_STNIC
;
123 dev
->netdev_ops
= &ei_netdev_ops
;
125 /* Snarf the interrupt now. There's no point in waiting since we cannot
126 share and the board will usually be enabled. */
127 err
= request_irq (dev
->irq
, ei_interrupt
, 0, DRV_NAME
, dev
);
129 printk (KERN_EMERG
" unable to get IRQ %d.\n", dev
->irq
);
134 ei_status
.name
= dev
->name
;
135 ei_status
.word16
= 1;
136 #ifdef __LITTLE_ENDIAN__
137 ei_status
.bigendian
= 0;
139 ei_status
.bigendian
= 1;
141 ei_status
.tx_start_page
= START_PG
;
142 ei_status
.rx_start_page
= START_PG
+ TX_PAGES
;
143 ei_status
.stop_page
= STOP_PG
;
145 ei_status
.reset_8390
= &stnic_reset
;
146 ei_status
.get_8390_hdr
= &stnic_get_hdr
;
147 ei_status
.block_input
= &stnic_block_input
;
148 ei_status
.block_output
= &stnic_block_output
;
152 err
= register_netdev(dev
);
154 free_irq(dev
->irq
, dev
);
160 printk (KERN_INFO
"NS ST-NIC 83902A\n");
166 stnic_reset (struct net_device
*dev
)
168 *(vhalf
*) PA_83902_RST
= 0;
171 printk (KERN_WARNING
"8390 reset done (%ld).\n", jiffies
);
172 *(vhalf
*) PA_83902_RST
= ~0;
177 stnic_get_hdr (struct net_device
*dev
, struct e8390_pkt_hdr
*hdr
,
182 STNIC_WRITE (PG0_RSAR0
, 0);
183 STNIC_WRITE (PG0_RSAR1
, ring_page
);
184 STNIC_WRITE (PG0_RBCR0
, 4);
185 STNIC_WRITE (PG0_RBCR1
, 0);
186 STNIC_WRITE (STNIC_CR
, CR_RRD
| CR_PG0
| CR_STA
);
188 buf
[0] = *(vhalf
*) PA_83902_IF
;
190 buf
[1] = *(vhalf
*) PA_83902_IF
;
192 hdr
->next
= buf
[0] >> 8;
193 hdr
->status
= buf
[0] & 0xff;
194 #ifdef __LITTLE_ENDIAN__
197 hdr
->count
= ((buf
[1] >> 8) & 0xff) | (buf
[1] << 8);
201 printk (KERN_DEBUG
"ring %x status %02x next %02x count %04x.\n",
202 ring_page
, hdr
->status
, hdr
->next
, hdr
->count
);
204 STNIC_WRITE (STNIC_CR
, CR_RDMA
| CR_PG0
| CR_STA
);
207 /* Block input and output, similar to the Crynwr packet driver. If you are
208 porting to a new ethercard look at the packet driver source for hints.
209 The HP LAN doesn't use shared memory -- we put the packet
210 out through the "remote DMA" dataport. */
213 stnic_block_input (struct net_device
*dev
, int length
, struct sk_buff
*skb
,
216 char *buf
= skb
->data
;
219 STNIC_WRITE (PG0_RSAR0
, offset
& 0xff);
220 STNIC_WRITE (PG0_RSAR1
, offset
>> 8);
221 STNIC_WRITE (PG0_RBCR0
, length
& 0xff);
222 STNIC_WRITE (PG0_RBCR1
, length
>> 8);
223 STNIC_WRITE (STNIC_CR
, CR_RRD
| CR_PG0
| CR_STA
);
230 val
= *(vhalf
*) PA_83902_IF
;
231 #ifdef __LITTLE_ENDIAN__
239 length
-= sizeof (half
);
242 STNIC_WRITE (STNIC_CR
, CR_RDMA
| CR_PG0
| CR_STA
);
246 stnic_block_output (struct net_device
*dev
, int length
,
247 const unsigned char *buf
, int output_page
)
249 STNIC_WRITE (PG0_RBCR0
, 1); /* Write non-zero value */
250 STNIC_WRITE (STNIC_CR
, CR_RRD
| CR_PG0
| CR_STA
);
253 STNIC_WRITE (PG0_RBCR0
, length
& 0xff);
254 STNIC_WRITE (PG0_RBCR1
, length
>> 8);
255 STNIC_WRITE (PG0_RSAR0
, 0);
256 STNIC_WRITE (PG0_RSAR1
, output_page
);
257 STNIC_WRITE (STNIC_CR
, CR_RWR
| CR_PG0
| CR_STA
);
264 #ifdef __LITTLE_ENDIAN__
265 *(vhalf
*) PA_83902_IF
= ((half
) buf
[1] << 8) | buf
[0];
267 *(vhalf
*) PA_83902_IF
= ((half
) buf
[0] << 8) | buf
[1];
270 buf
+= sizeof (half
);
271 length
-= sizeof (half
);
274 STNIC_WRITE (STNIC_CR
, CR_RDMA
| CR_PG0
| CR_STA
);
277 /* This function resets the STNIC if something screws up. */
279 stnic_init (struct net_device
*dev
)
282 NS8390_init (dev
, 0);
285 static void __exit
stnic_cleanup(void)
287 unregister_netdev(stnic_dev
);
288 free_irq(stnic_dev
->irq
, stnic_dev
);
289 free_netdev(stnic_dev
);
292 module_init(stnic_probe
);
293 module_exit(stnic_cleanup
);
294 MODULE_LICENSE("GPL");
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