4 Linux driver for Mylex LNE390 EISA Network Adapter
6 Copyright (C) 1996-1998, Paul Gortmaker.
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
11 Information and Code Sources:
13 1) Based upon framework of es3210 driver.
14 2) The existing myriad of other Linux 8390 drivers by Donald Becker.
15 3) Russ Nelson's asm packet driver provided additional info.
16 4) Info for getting IRQ and sh-mem gleaned from the EISA cfg files.
18 The LNE390 is an EISA shared memory NS8390 implementation. Note
19 that all memory copies to/from the board must be 32bit transfers.
20 There are two versions of the card: the lne390a and the lne390b.
21 Going by the EISA cfg files, the "a" has jumpers to select between
22 BNC/AUI, but the "b" also has RJ-45 and selection is via the SCU.
23 The shared memory address selection is also slightly different.
24 Note that shared memory address > 1MB are supported with this driver.
26 You can try <http://www.mylex.com> if you want more info, as I've
27 never even seen one of these cards. :)
29 Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/09/01
30 - get rid of check_region
31 - no need to check if dev == NULL in lne390_probe1
34 static const char *version =
35 "lne390.c: Driver revision v0.99.1, 01/09/2000\n";
37 #include <linux/module.h>
38 #include <linux/eisa.h>
39 #include <linux/kernel.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/delay.h>
43 #include <linux/init.h>
44 #include <linux/netdevice.h>
45 #include <linux/etherdevice.h>
48 #include <asm/system.h>
52 #define DRV_NAME "lne390"
54 static int lne390_probe1(struct net_device *dev, int ioaddr);
56 static int lne390_open(struct net_device *dev);
57 static int lne390_close(struct net_device *dev);
59 static void lne390_reset_8390(struct net_device *dev);
61 static void lne390_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
62 static void lne390_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset);
63 static void lne390_block_output(struct net_device *dev, int count, const unsigned char *buf, const int start_page);
65 #define LNE390_START_PG 0x00 /* First page of TX buffer */
66 #define LNE390_STOP_PG 0x80 /* Last page +1 of RX ring */
68 #define LNE390_ID_PORT 0xc80 /* Same for all EISA cards */
69 #define LNE390_IO_EXTENT 0x20
70 #define LNE390_SA_PROM 0x16 /* Start of e'net addr. */
71 #define LNE390_RESET_PORT 0xc84 /* From the pkt driver source */
72 #define LNE390_NIC_OFFSET 0x00 /* Hello, the 8390 is *here* */
74 #define LNE390_ADDR0 0x00 /* 3 byte vendor prefix */
75 #define LNE390_ADDR1 0x80
76 #define LNE390_ADDR2 0xe5
78 #define LNE390_ID0 0x10009835 /* 0x3598 = 01101 01100 11000 = mlx */
79 #define LNE390_ID1 0x11009835 /* above is the 390A, this is 390B */
81 #define LNE390_CFG1 0xc84 /* NB: 0xc84 is also "reset" port. */
82 #define LNE390_CFG2 0xc90
85 * You can OR any of the following bits together and assign it
86 * to LNE390_DEBUG to get verbose driver info during operation.
87 * Currently only the probe one is implemented.
90 #define LNE390_D_PROBE 0x01
91 #define LNE390_D_RX_PKT 0x02
92 #define LNE390_D_TX_PKT 0x04
93 #define LNE390_D_IRQ 0x08
95 #define LNE390_DEBUG 0
97 static unsigned char irq_map[] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
98 static unsigned int shmem_mapA[] __initdata = {0xff, 0xfe, 0xfd, 0xfff, 0xffe, 0xffc, 0x0d, 0x0};
99 static unsigned int shmem_mapB[] __initdata = {0xff, 0xfe, 0x0e, 0xfff, 0xffe, 0xffc, 0x0d, 0x0};
102 * Probe for the card. The best way is to read the EISA ID if it
103 * is known. Then we can check the prefix of the station address
104 * PROM for a match against the value assigned to Mylex.
107 static int __init do_lne390_probe(struct net_device *dev)
109 unsigned short ioaddr = dev->base_addr;
111 int mem_start = dev->mem_start;
114 if (ioaddr > 0x1ff) { /* Check a single specified location. */
115 if (!request_region(ioaddr, LNE390_IO_EXTENT, DRV_NAME))
117 ret = lne390_probe1(dev, ioaddr);
119 release_region(ioaddr, LNE390_IO_EXTENT);
122 else if (ioaddr > 0) /* Don't probe at all. */
126 #if LNE390_DEBUG & LNE390_D_PROBE
127 printk("lne390-debug: Not an EISA bus. Not probing high ports.\n");
132 /* EISA spec allows for up to 16 slots, but 8 is typical. */
133 for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
134 if (!request_region(ioaddr, LNE390_IO_EXTENT, DRV_NAME))
136 if (lne390_probe1(dev, ioaddr) == 0)
138 release_region(ioaddr, LNE390_IO_EXTENT);
140 dev->mem_start = mem_start;
147 struct net_device * __init lne390_probe(int unit)
149 struct net_device *dev = alloc_ei_netdev();
153 return ERR_PTR(-ENOMEM);
155 sprintf(dev->name, "eth%d", unit);
156 netdev_boot_setup_check(dev);
158 err = do_lne390_probe(dev);
168 static int __init lne390_probe1(struct net_device *dev, int ioaddr)
170 int i, revision, ret;
171 unsigned long eisa_id;
173 if (inb_p(ioaddr + LNE390_ID_PORT) == 0xff) return -ENODEV;
175 #if LNE390_DEBUG & LNE390_D_PROBE
176 printk("lne390-debug: probe at %#x, ID %#8x\n", ioaddr, inl(ioaddr + LNE390_ID_PORT));
177 printk("lne390-debug: config regs: %#x %#x\n",
178 inb(ioaddr + LNE390_CFG1), inb(ioaddr + LNE390_CFG2));
182 /* Check the EISA ID of the card. */
183 eisa_id = inl(ioaddr + LNE390_ID_PORT);
184 if ((eisa_id != LNE390_ID0) && (eisa_id != LNE390_ID1)) {
188 revision = (eisa_id >> 24) & 0x01; /* 0 = rev A, 1 rev B */
191 /* Check the Mylex vendor ID as well. Not really required. */
192 if (inb(ioaddr + LNE390_SA_PROM + 0) != LNE390_ADDR0
193 || inb(ioaddr + LNE390_SA_PROM + 1) != LNE390_ADDR1
194 || inb(ioaddr + LNE390_SA_PROM + 2) != LNE390_ADDR2 ) {
195 printk("lne390.c: card not found");
196 for(i = 0; i < ETHER_ADDR_LEN; i++)
197 printk(" %02x", inb(ioaddr + LNE390_SA_PROM + i));
198 printk(" (invalid prefix).\n");
203 printk("lne390.c: LNE390%X in EISA slot %d, address", 0xa+revision, ioaddr/0x1000);
204 for(i = 0; i < ETHER_ADDR_LEN; i++)
205 printk(" %02x", (dev->dev_addr[i] = inb(ioaddr + LNE390_SA_PROM + i)));
206 printk(".\nlne390.c: ");
208 /* Snarf the interrupt now. CFG file has them all listed as `edge' with share=NO */
210 unsigned char irq_reg = inb(ioaddr + LNE390_CFG2) >> 3;
211 dev->irq = irq_map[irq_reg & 0x07];
214 /* This is useless unless we reprogram the card here too */
215 if (dev->irq == 2) dev->irq = 9; /* Doh! */
218 printk(" IRQ %d,", dev->irq);
220 if ((ret = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev))) {
221 printk (" unable to get IRQ %d.\n", dev->irq);
225 if (dev->mem_start == 0) {
226 unsigned char mem_reg = inb(ioaddr + LNE390_CFG2) & 0x07;
228 if (revision) /* LNE390B */
229 dev->mem_start = shmem_mapB[mem_reg] * 0x10000;
231 dev->mem_start = shmem_mapA[mem_reg] * 0x10000;
234 /* Should check for value in shmem_map and reprogram the card to use it */
235 dev->mem_start &= 0xfff0000;
236 printk(" assigning ");
239 printk("%dkB memory at physical address %#lx\n",
240 LNE390_STOP_PG/4, dev->mem_start);
243 BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
244 the card mem within the region covered by `normal' RAM !!!
246 ioremap() will fail in that case.
248 ei_status.mem = ioremap(dev->mem_start, LNE390_STOP_PG*0x100);
249 if (!ei_status.mem) {
250 printk(KERN_ERR "lne390.c: Unable to remap card memory above 1MB !!\n");
251 printk(KERN_ERR "lne390.c: Try using EISA SCU to set memory below 1MB.\n");
252 printk(KERN_ERR "lne390.c: Driver NOT installed.\n");
256 printk("lne390.c: remapped %dkB card memory to virtual address %p\n",
257 LNE390_STOP_PG/4, ei_status.mem);
259 dev->mem_start = (unsigned long)ei_status.mem;
260 dev->mem_end = dev->mem_start + (LNE390_STOP_PG - LNE390_START_PG)*256;
262 /* The 8390 offset is zero for the LNE390 */
263 dev->base_addr = ioaddr;
265 ei_status.name = "LNE390";
266 ei_status.tx_start_page = LNE390_START_PG;
267 ei_status.rx_start_page = LNE390_START_PG + TX_PAGES;
268 ei_status.stop_page = LNE390_STOP_PG;
269 ei_status.word16 = 1;
274 ei_status.reset_8390 = &lne390_reset_8390;
275 ei_status.block_input = &lne390_block_input;
276 ei_status.block_output = &lne390_block_output;
277 ei_status.get_8390_hdr = &lne390_get_8390_hdr;
279 dev->open = &lne390_open;
280 dev->stop = &lne390_close;
281 #ifdef CONFIG_NET_POLL_CONTROLLER
282 dev->poll_controller = ei_poll;
286 ret = register_netdev(dev);
292 iounmap(ei_status.mem);
294 free_irq(dev->irq, dev);
299 * Reset as per the packet driver method. Judging by the EISA cfg
300 * file, this just toggles the "Board Enable" bits (bit 2 and 0).
303 static void lne390_reset_8390(struct net_device *dev)
305 unsigned short ioaddr = dev->base_addr;
307 outb(0x04, ioaddr + LNE390_RESET_PORT);
308 if (ei_debug > 1) printk("%s: resetting the LNE390...", dev->name);
313 outb(0x01, ioaddr + LNE390_RESET_PORT);
314 if (ei_debug > 1) printk("reset done\n");
320 * Note: In the following three functions is the implicit assumption
321 * that the associated memcpy will only use "rep; movsl" as long as
322 * we keep the counts as some multiple of doublewords. This is a
323 * requirement of the hardware, and also prevents us from using
324 * eth_io_copy_and_sum() since we can't guarantee it will limit
325 * itself to doubleword access.
329 * Grab the 8390 specific header. Similar to the block_input routine, but
330 * we don't need to be concerned with ring wrap as the header will be at
331 * the start of a page, so we optimize accordingly. (A single doubleword.)
335 lne390_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
337 void __iomem *hdr_start = ei_status.mem + ((ring_page - LNE390_START_PG)<<8);
338 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
339 hdr->count = (hdr->count + 3) & ~3; /* Round up allocation. */
343 * Block input and output are easy on shared memory ethercards, the only
344 * complication is when the ring buffer wraps. The count will already
345 * be rounded up to a doubleword value via lne390_get_8390_hdr() above.
348 static void lne390_block_input(struct net_device *dev, int count, struct sk_buff *skb,
351 void __iomem *xfer_start = ei_status.mem + ring_offset - (LNE390_START_PG<<8);
353 if (ring_offset + count > (LNE390_STOP_PG<<8)) {
354 /* Packet wraps over end of ring buffer. */
355 int semi_count = (LNE390_STOP_PG<<8) - ring_offset;
356 memcpy_fromio(skb->data, xfer_start, semi_count);
358 memcpy_fromio(skb->data + semi_count,
359 ei_status.mem + (TX_PAGES<<8), count);
361 /* Packet is in one chunk. */
362 memcpy_fromio(skb->data, xfer_start, count);
366 static void lne390_block_output(struct net_device *dev, int count,
367 const unsigned char *buf, int start_page)
369 void __iomem *shmem = ei_status.mem + ((start_page - LNE390_START_PG)<<8);
371 count = (count + 3) & ~3; /* Round up to doubleword */
372 memcpy_toio(shmem, buf, count);
375 static int lne390_open(struct net_device *dev)
381 static int lne390_close(struct net_device *dev)
385 printk("%s: Shutting down ethercard.\n", dev->name);
392 #define MAX_LNE_CARDS 4 /* Max number of LNE390 cards per module */
393 static struct net_device *dev_lne[MAX_LNE_CARDS];
394 static int io[MAX_LNE_CARDS];
395 static int irq[MAX_LNE_CARDS];
396 static int mem[MAX_LNE_CARDS];
398 module_param_array(io, int, NULL, 0);
399 module_param_array(irq, int, NULL, 0);
400 module_param_array(mem, int, NULL, 0);
401 MODULE_PARM_DESC(io, "I/O base address(es)");
402 MODULE_PARM_DESC(irq, "IRQ number(s)");
403 MODULE_PARM_DESC(mem, "memory base address(es)");
404 MODULE_DESCRIPTION("Mylex LNE390A/B EISA Ethernet driver");
405 MODULE_LICENSE("GPL");
407 int __init init_module(void)
409 struct net_device *dev;
410 int this_dev, found = 0;
412 for (this_dev = 0; this_dev < MAX_LNE_CARDS; this_dev++) {
413 if (io[this_dev] == 0 && this_dev != 0)
415 dev = alloc_ei_netdev();
418 dev->irq = irq[this_dev];
419 dev->base_addr = io[this_dev];
420 dev->mem_start = mem[this_dev];
421 if (do_lne390_probe(dev) == 0) {
422 dev_lne[found++] = dev;
426 printk(KERN_WARNING "lne390.c: No LNE390 card found (i/o = 0x%x).\n", io[this_dev]);
434 static void cleanup_card(struct net_device *dev)
436 free_irq(dev->irq, dev);
437 release_region(dev->base_addr, LNE390_IO_EXTENT);
438 iounmap(ei_status.mem);
441 void __exit cleanup_module(void)
445 for (this_dev = 0; this_dev < MAX_LNE_CARDS; this_dev++) {
446 struct net_device *dev = dev_lne[this_dev];
448 unregister_netdev(dev);