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");