Root/drivers/net/lne390.c

1/*
2    lne390.c
3
4    Linux driver for Mylex LNE390 EISA Network Adapter
5
6    Copyright (C) 1996-1998, Paul Gortmaker.
7
8    This software may be used and distributed according to the terms
9    of the GNU General Public License, incorporated herein by reference.
10
11    Information and Code Sources:
12
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.
17
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.
25
26    You can try <http://www.mylex.com> if you want more info, as I've
27    never even seen one of these cards. :)
28
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
32*/
33
34static const char *version =
35    "lne390.c: Driver revision v0.99.1, 01/09/2000\n";
36
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>
46
47#include <asm/io.h>
48#include <asm/system.h>
49
50#include "8390.h"
51
52#define DRV_NAME "lne390"
53
54static int lne390_probe1(struct net_device *dev, int ioaddr);
55
56static void lne390_reset_8390(struct net_device *dev);
57
58static void lne390_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page);
59static void lne390_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset);
60static void lne390_block_output(struct net_device *dev, int count, const unsigned char *buf, const int start_page);
61
62#define LNE390_START_PG 0x00 /* First page of TX buffer */
63#define LNE390_STOP_PG 0x80 /* Last page +1 of RX ring */
64
65#define LNE390_ID_PORT 0xc80 /* Same for all EISA cards */
66#define LNE390_IO_EXTENT 0x20
67#define LNE390_SA_PROM 0x16 /* Start of e'net addr. */
68#define LNE390_RESET_PORT 0xc84 /* From the pkt driver source */
69#define LNE390_NIC_OFFSET 0x00 /* Hello, the 8390 is *here* */
70
71#define LNE390_ADDR0 0x00 /* 3 byte vendor prefix */
72#define LNE390_ADDR1 0x80
73#define LNE390_ADDR2 0xe5
74
75#define LNE390_ID0 0x10009835 /* 0x3598 = 01101 01100 11000 = mlx */
76#define LNE390_ID1 0x11009835 /* above is the 390A, this is 390B */
77
78#define LNE390_CFG1 0xc84 /* NB: 0xc84 is also "reset" port. */
79#define LNE390_CFG2 0xc90
80
81/*
82 * You can OR any of the following bits together and assign it
83 * to LNE390_DEBUG to get verbose driver info during operation.
84 * Currently only the probe one is implemented.
85 */
86
87#define LNE390_D_PROBE 0x01
88#define LNE390_D_RX_PKT 0x02
89#define LNE390_D_TX_PKT 0x04
90#define LNE390_D_IRQ 0x08
91
92#define LNE390_DEBUG 0
93
94static unsigned char irq_map[] __initdata = {15, 12, 11, 10, 9, 7, 5, 3};
95static unsigned int shmem_mapA[] __initdata = {0xff, 0xfe, 0xfd, 0xfff, 0xffe, 0xffc, 0x0d, 0x0};
96static unsigned int shmem_mapB[] __initdata = {0xff, 0xfe, 0x0e, 0xfff, 0xffe, 0xffc, 0x0d, 0x0};
97
98/*
99 * Probe for the card. The best way is to read the EISA ID if it
100 * is known. Then we can check the prefix of the station address
101 * PROM for a match against the value assigned to Mylex.
102 */
103
104static int __init do_lne390_probe(struct net_device *dev)
105{
106    unsigned short ioaddr = dev->base_addr;
107    int irq = dev->irq;
108    int mem_start = dev->mem_start;
109    int ret;
110
111    if (ioaddr > 0x1ff) { /* Check a single specified location. */
112        if (!request_region(ioaddr, LNE390_IO_EXTENT, DRV_NAME))
113            return -EBUSY;
114        ret = lne390_probe1(dev, ioaddr);
115        if (ret)
116            release_region(ioaddr, LNE390_IO_EXTENT);
117        return ret;
118    }
119    else if (ioaddr > 0) /* Don't probe at all. */
120        return -ENXIO;
121
122    if (!EISA_bus) {
123#if LNE390_DEBUG & LNE390_D_PROBE
124        printk("lne390-debug: Not an EISA bus. Not probing high ports.\n");
125#endif
126        return -ENXIO;
127    }
128
129    /* EISA spec allows for up to 16 slots, but 8 is typical. */
130    for (ioaddr = 0x1000; ioaddr < 0x9000; ioaddr += 0x1000) {
131        if (!request_region(ioaddr, LNE390_IO_EXTENT, DRV_NAME))
132            continue;
133        if (lne390_probe1(dev, ioaddr) == 0)
134            return 0;
135        release_region(ioaddr, LNE390_IO_EXTENT);
136        dev->irq = irq;
137        dev->mem_start = mem_start;
138    }
139
140    return -ENODEV;
141}
142
143#ifndef MODULE
144struct net_device * __init lne390_probe(int unit)
145{
146    struct net_device *dev = alloc_ei_netdev();
147    int err;
148
149    if (!dev)
150        return ERR_PTR(-ENOMEM);
151
152    sprintf(dev->name, "eth%d", unit);
153    netdev_boot_setup_check(dev);
154
155    err = do_lne390_probe(dev);
156    if (err)
157        goto out;
158    return dev;
159out:
160    free_netdev(dev);
161    return ERR_PTR(err);
162}
163#endif
164
165static int __init lne390_probe1(struct net_device *dev, int ioaddr)
166{
167    int i, revision, ret;
168    unsigned long eisa_id;
169
170    if (inb_p(ioaddr + LNE390_ID_PORT) == 0xff) return -ENODEV;
171
172#if LNE390_DEBUG & LNE390_D_PROBE
173    printk("lne390-debug: probe at %#x, ID %#8x\n", ioaddr, inl(ioaddr + LNE390_ID_PORT));
174    printk("lne390-debug: config regs: %#x %#x\n",
175        inb(ioaddr + LNE390_CFG1), inb(ioaddr + LNE390_CFG2));
176#endif
177
178
179/* Check the EISA ID of the card. */
180    eisa_id = inl(ioaddr + LNE390_ID_PORT);
181    if ((eisa_id != LNE390_ID0) && (eisa_id != LNE390_ID1)) {
182        return -ENODEV;
183    }
184
185    revision = (eisa_id >> 24) & 0x01; /* 0 = rev A, 1 rev B */
186
187#if 0
188/* Check the Mylex vendor ID as well. Not really required. */
189    if (inb(ioaddr + LNE390_SA_PROM + 0) != LNE390_ADDR0
190        || inb(ioaddr + LNE390_SA_PROM + 1) != LNE390_ADDR1
191        || inb(ioaddr + LNE390_SA_PROM + 2) != LNE390_ADDR2 ) {
192        printk("lne390.c: card not found");
193        for(i = 0; i < ETHER_ADDR_LEN; i++)
194            printk(" %02x", inb(ioaddr + LNE390_SA_PROM + i));
195        printk(" (invalid prefix).\n");
196        return -ENODEV;
197    }
198#endif
199
200    for(i = 0; i < ETHER_ADDR_LEN; i++)
201        dev->dev_addr[i] = inb(ioaddr + LNE390_SA_PROM + i);
202    printk("lne390.c: LNE390%X in EISA slot %d, address %pM.\n",
203           0xa+revision, ioaddr/0x1000, dev->dev_addr);
204
205    printk("lne390.c: ");
206
207    /* Snarf the interrupt now. CFG file has them all listed as `edge' with share=NO */
208    if (dev->irq == 0) {
209        unsigned char irq_reg = inb(ioaddr + LNE390_CFG2) >> 3;
210        dev->irq = irq_map[irq_reg & 0x07];
211        printk("using");
212    } else {
213        /* This is useless unless we reprogram the card here too */
214        if (dev->irq == 2) dev->irq = 9; /* Doh! */
215        printk("assigning");
216    }
217    printk(" IRQ %d,", dev->irq);
218
219    if ((ret = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev))) {
220        printk (" unable to get IRQ %d.\n", dev->irq);
221        return ret;
222    }
223
224    if (dev->mem_start == 0) {
225        unsigned char mem_reg = inb(ioaddr + LNE390_CFG2) & 0x07;
226
227        if (revision) /* LNE390B */
228            dev->mem_start = shmem_mapB[mem_reg] * 0x10000;
229        else /* LNE390A */
230            dev->mem_start = shmem_mapA[mem_reg] * 0x10000;
231        printk(" using ");
232    } else {
233        /* Should check for value in shmem_map and reprogram the card to use it */
234        dev->mem_start &= 0xfff0000;
235        printk(" assigning ");
236    }
237
238    printk("%dkB memory at physical address %#lx\n",
239            LNE390_STOP_PG/4, dev->mem_start);
240
241    /*
242       BEWARE!! Some dain-bramaged EISA SCUs will allow you to put
243       the card mem within the region covered by `normal' RAM !!!
244
245       ioremap() will fail in that case.
246    */
247    ei_status.mem = ioremap(dev->mem_start, LNE390_STOP_PG*0x100);
248    if (!ei_status.mem) {
249        printk(KERN_ERR "lne390.c: Unable to remap card memory above 1MB !!\n");
250        printk(KERN_ERR "lne390.c: Try using EISA SCU to set memory below 1MB.\n");
251        printk(KERN_ERR "lne390.c: Driver NOT installed.\n");
252        ret = -EAGAIN;
253        goto cleanup;
254    }
255    printk("lne390.c: remapped %dkB card memory to virtual address %p\n",
256            LNE390_STOP_PG/4, ei_status.mem);
257
258    dev->mem_start = (unsigned long)ei_status.mem;
259    dev->mem_end = dev->mem_start + (LNE390_STOP_PG - LNE390_START_PG)*256;
260
261    /* The 8390 offset is zero for the LNE390 */
262    dev->base_addr = ioaddr;
263
264    ei_status.name = "LNE390";
265    ei_status.tx_start_page = LNE390_START_PG;
266    ei_status.rx_start_page = LNE390_START_PG + TX_PAGES;
267    ei_status.stop_page = LNE390_STOP_PG;
268    ei_status.word16 = 1;
269
270    if (ei_debug > 0)
271        printk(version);
272
273    ei_status.reset_8390 = &lne390_reset_8390;
274    ei_status.block_input = &lne390_block_input;
275    ei_status.block_output = &lne390_block_output;
276    ei_status.get_8390_hdr = &lne390_get_8390_hdr;
277
278    dev->netdev_ops = &ei_netdev_ops;
279    NS8390_init(dev, 0);
280
281    ret = register_netdev(dev);
282    if (ret)
283        goto unmap;
284    return 0;
285unmap:
286    if (ei_status.reg0)
287        iounmap(ei_status.mem);
288cleanup:
289    free_irq(dev->irq, dev);
290    return ret;
291}
292
293/*
294 * Reset as per the packet driver method. Judging by the EISA cfg
295 * file, this just toggles the "Board Enable" bits (bit 2 and 0).
296 */
297
298static void lne390_reset_8390(struct net_device *dev)
299{
300    unsigned short ioaddr = dev->base_addr;
301
302    outb(0x04, ioaddr + LNE390_RESET_PORT);
303    if (ei_debug > 1) printk("%s: resetting the LNE390...", dev->name);
304
305    mdelay(2);
306
307    ei_status.txing = 0;
308    outb(0x01, ioaddr + LNE390_RESET_PORT);
309    if (ei_debug > 1) printk("reset done\n");
310
311    return;
312}
313
314/*
315 * Note: In the following three functions is the implicit assumption
316 * that the associated memcpy will only use "rep; movsl" as long as
317 * we keep the counts as some multiple of doublewords. This is a
318 * requirement of the hardware, and also prevents us from using
319 * eth_io_copy_and_sum() since we can't guarantee it will limit
320 * itself to doubleword access.
321 */
322
323/*
324 * Grab the 8390 specific header. Similar to the block_input routine, but
325 * we don't need to be concerned with ring wrap as the header will be at
326 * the start of a page, so we optimize accordingly. (A single doubleword.)
327 */
328
329static void
330lne390_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
331{
332    void __iomem *hdr_start = ei_status.mem + ((ring_page - LNE390_START_PG)<<8);
333    memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
334    hdr->count = (hdr->count + 3) & ~3; /* Round up allocation. */
335}
336
337/*
338 * Block input and output are easy on shared memory ethercards, the only
339 * complication is when the ring buffer wraps. The count will already
340 * be rounded up to a doubleword value via lne390_get_8390_hdr() above.
341 */
342
343static void lne390_block_input(struct net_device *dev, int count, struct sk_buff *skb,
344                          int ring_offset)
345{
346    void __iomem *xfer_start = ei_status.mem + ring_offset - (LNE390_START_PG<<8);
347
348    if (ring_offset + count > (LNE390_STOP_PG<<8)) {
349        /* Packet wraps over end of ring buffer. */
350        int semi_count = (LNE390_STOP_PG<<8) - ring_offset;
351        memcpy_fromio(skb->data, xfer_start, semi_count);
352        count -= semi_count;
353        memcpy_fromio(skb->data + semi_count,
354            ei_status.mem + (TX_PAGES<<8), count);
355    } else {
356        /* Packet is in one chunk. */
357        memcpy_fromio(skb->data, xfer_start, count);
358    }
359}
360
361static void lne390_block_output(struct net_device *dev, int count,
362                const unsigned char *buf, int start_page)
363{
364    void __iomem *shmem = ei_status.mem + ((start_page - LNE390_START_PG)<<8);
365
366    count = (count + 3) & ~3; /* Round up to doubleword */
367    memcpy_toio(shmem, buf, count);
368}
369
370
371#ifdef MODULE
372#define MAX_LNE_CARDS 4 /* Max number of LNE390 cards per module */
373static struct net_device *dev_lne[MAX_LNE_CARDS];
374static int io[MAX_LNE_CARDS];
375static int irq[MAX_LNE_CARDS];
376static int mem[MAX_LNE_CARDS];
377
378module_param_array(io, int, NULL, 0);
379module_param_array(irq, int, NULL, 0);
380module_param_array(mem, int, NULL, 0);
381MODULE_PARM_DESC(io, "I/O base address(es)");
382MODULE_PARM_DESC(irq, "IRQ number(s)");
383MODULE_PARM_DESC(mem, "memory base address(es)");
384MODULE_DESCRIPTION("Mylex LNE390A/B EISA Ethernet driver");
385MODULE_LICENSE("GPL");
386
387int __init init_module(void)
388{
389    struct net_device *dev;
390    int this_dev, found = 0;
391
392    for (this_dev = 0; this_dev < MAX_LNE_CARDS; this_dev++) {
393        if (io[this_dev] == 0 && this_dev != 0)
394            break;
395        dev = alloc_ei_netdev();
396        if (!dev)
397            break;
398        dev->irq = irq[this_dev];
399        dev->base_addr = io[this_dev];
400        dev->mem_start = mem[this_dev];
401        if (do_lne390_probe(dev) == 0) {
402            dev_lne[found++] = dev;
403            continue;
404        }
405        free_netdev(dev);
406        printk(KERN_WARNING "lne390.c: No LNE390 card found (i/o = 0x%x).\n", io[this_dev]);
407        break;
408    }
409    if (found)
410        return 0;
411    return -ENXIO;
412}
413
414static void cleanup_card(struct net_device *dev)
415{
416    free_irq(dev->irq, dev);
417    release_region(dev->base_addr, LNE390_IO_EXTENT);
418    iounmap(ei_status.mem);
419}
420
421void __exit cleanup_module(void)
422{
423    int this_dev;
424
425    for (this_dev = 0; this_dev < MAX_LNE_CARDS; this_dev++) {
426        struct net_device *dev = dev_lne[this_dev];
427        if (dev) {
428            unregister_netdev(dev);
429            cleanup_card(dev);
430            free_netdev(dev);
431        }
432    }
433}
434#endif /* MODULE */
435
436

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