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>
21 #include <mach-se/mach/se.h>
22 #include <asm/machvec.h>
23 #ifdef CONFIG_SH_STANDARD_BIOS
24 #include <asm/sh_bios.h>
29 #define DRV_NAME "stnic"
31 #define byte unsigned char
32 #define half unsigned short
33 #define word unsigned int
34 #define vbyte volatile unsigned char
35 #define vhalf volatile unsigned short
36 #define vword volatile unsigned int
38 #define STNIC_RUN 0x01 /* 1 == Run, 0 == reset. */
40 #define START_PG 0 /* First page of TX buffer */
41 #define STOP_PG 128 /* Last page +1 of RX ring */
44 #define STNIC_CR E8390_CMD
45 #define PG0_RSAR0 EN0_RSARLO
46 #define PG0_RSAR1 EN0_RSARHI
47 #define PG0_RBCR0 EN0_RCNTLO
48 #define PG0_RBCR1 EN0_RCNTHI
50 #define CR_RRD E8390_RREAD
51 #define CR_RWR E8390_RWRITE
52 #define CR_PG0 E8390_PAGE0
53 #define CR_STA E8390_START
54 #define CR_RDMA E8390_NODMA
56 /* FIXME! YOU MUST SET YOUR OWN ETHER ADDRESS. */
57 static byte stnic_eadr[6] =
58 {0x00, 0xc0, 0x6e, 0x00, 0x00, 0x07};
60 static struct net_device *stnic_dev;
62 static void stnic_reset (struct net_device *dev);
63 static void stnic_get_hdr (struct net_device *dev, struct e8390_pkt_hdr *hdr,
65 static void stnic_block_input (struct net_device *dev, int count,
66 struct sk_buff *skb , int ring_offset);
67 static void stnic_block_output (struct net_device *dev, int count,
68 const unsigned char *buf, int start_page);
70 static void stnic_init (struct net_device *dev);
72 static u32 stnic_msg_enable;
74 module_param_named(msg_enable, stnic_msg_enable, uint, 0444);
75 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
77 /* SH7750 specific read/write io. */
82 trash = *(vword *) 0xa0000000;
83 trash = *(vword *) 0xa0000000;
84 trash = *(vword *) 0xa0000000;
92 val = (*(vhalf *) (PA_83902 + ((reg) << 1)) >> 8) & 0xff;
98 STNIC_WRITE (int reg, byte val)
100 *(vhalf *) (PA_83902 + ((reg) << 1)) = ((half) (val) << 8);
104 static int __init stnic_probe(void)
106 struct net_device *dev;
107 struct ei_device *ei_local;
110 /* If we are not running on a SolutionEngine, give up now */
114 /* New style probing API */
115 dev = alloc_ei_netdev();
119 #ifdef CONFIG_SH_STANDARD_BIOS
120 sh_bios_get_node_addr (stnic_eadr);
122 eth_hw_addr_set(dev, stnic_eadr);
124 /* Set the base address to point to the NIC, not the "real" base! */
125 dev->base_addr = 0x1000;
126 dev->irq = IRQ_STNIC;
127 dev->netdev_ops = &ei_netdev_ops;
129 /* Snarf the interrupt now. There's no point in waiting since we cannot
130 share and the board will usually be enabled. */
131 err = request_irq (dev->irq, ei_interrupt, 0, DRV_NAME, dev);
133 netdev_emerg(dev, " unable to get IRQ %d.\n", dev->irq);
138 ei_status.name = dev->name;
139 ei_status.word16 = 1;
140 #ifdef __LITTLE_ENDIAN__
141 ei_status.bigendian = 0;
143 ei_status.bigendian = 1;
145 ei_status.tx_start_page = START_PG;
146 ei_status.rx_start_page = START_PG + TX_PAGES;
147 ei_status.stop_page = STOP_PG;
149 ei_status.reset_8390 = &stnic_reset;
150 ei_status.get_8390_hdr = &stnic_get_hdr;
151 ei_status.block_input = &stnic_block_input;
152 ei_status.block_output = &stnic_block_output;
155 ei_local = netdev_priv(dev);
156 ei_local->msg_enable = stnic_msg_enable;
158 err = register_netdev(dev);
160 free_irq(dev->irq, dev);
166 netdev_info(dev, "NS ST-NIC 83902A\n");
172 stnic_reset (struct net_device *dev)
174 struct ei_device *ei_local = netdev_priv(dev);
176 *(vhalf *) PA_83902_RST = 0;
178 netif_warn(ei_local, hw, dev, "8390 reset done (%ld).\n", jiffies);
179 *(vhalf *) PA_83902_RST = ~0;
184 stnic_get_hdr (struct net_device *dev, struct e8390_pkt_hdr *hdr,
187 struct ei_device *ei_local = netdev_priv(dev);
191 STNIC_WRITE (PG0_RSAR0, 0);
192 STNIC_WRITE (PG0_RSAR1, ring_page);
193 STNIC_WRITE (PG0_RBCR0, 4);
194 STNIC_WRITE (PG0_RBCR1, 0);
195 STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
197 buf[0] = *(vhalf *) PA_83902_IF;
199 buf[1] = *(vhalf *) PA_83902_IF;
201 hdr->next = buf[0] >> 8;
202 hdr->status = buf[0] & 0xff;
203 #ifdef __LITTLE_ENDIAN__
206 hdr->count = ((buf[1] >> 8) & 0xff) | (buf[1] << 8);
209 netif_dbg(ei_local, probe, dev, "ring %x status %02x next %02x count %04x.\n",
210 ring_page, hdr->status, hdr->next, hdr->count);
212 STNIC_WRITE (STNIC_CR, CR_RDMA | CR_PG0 | CR_STA);
215 /* Block input and output, similar to the Crynwr packet driver. If you are
216 porting to a new ethercard look at the packet driver source for hints.
217 The HP LAN doesn't use shared memory -- we put the packet
218 out through the "remote DMA" dataport. */
221 stnic_block_input (struct net_device *dev, int length, struct sk_buff *skb,
224 char *buf = skb->data;
227 STNIC_WRITE (PG0_RSAR0, offset & 0xff);
228 STNIC_WRITE (PG0_RSAR1, offset >> 8);
229 STNIC_WRITE (PG0_RBCR0, length & 0xff);
230 STNIC_WRITE (PG0_RBCR1, length >> 8);
231 STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
238 val = *(vhalf *) PA_83902_IF;
239 #ifdef __LITTLE_ENDIAN__
247 length -= sizeof (half);
250 STNIC_WRITE (STNIC_CR, CR_RDMA | CR_PG0 | CR_STA);
254 stnic_block_output (struct net_device *dev, int length,
255 const unsigned char *buf, int output_page)
257 STNIC_WRITE (PG0_RBCR0, 1); /* Write non-zero value */
258 STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
261 STNIC_WRITE (PG0_RBCR0, length & 0xff);
262 STNIC_WRITE (PG0_RBCR1, length >> 8);
263 STNIC_WRITE (PG0_RSAR0, 0);
264 STNIC_WRITE (PG0_RSAR1, output_page);
265 STNIC_WRITE (STNIC_CR, CR_RWR | CR_PG0 | CR_STA);
272 #ifdef __LITTLE_ENDIAN__
273 *(vhalf *) PA_83902_IF = ((half) buf[1] << 8) | buf[0];
275 *(vhalf *) PA_83902_IF = ((half) buf[0] << 8) | buf[1];
278 buf += sizeof (half);
279 length -= sizeof (half);
282 STNIC_WRITE (STNIC_CR, CR_RDMA | CR_PG0 | CR_STA);
285 /* This function resets the STNIC if something screws up. */
287 stnic_init (struct net_device *dev)
290 NS8390_init (dev, 0);
293 static void __exit stnic_cleanup(void)
295 unregister_netdev(stnic_dev);
296 free_irq(stnic_dev->irq, stnic_dev);
297 free_netdev(stnic_dev);
300 module_init(stnic_probe);
301 module_exit(stnic_cleanup);
302 MODULE_LICENSE("GPL");