1 /* smc-ultra32.c: An SMC Ultra32 EISA ethernet driver for linux.
5 This driver is based on (cloned from) the ISA SMC Ultra driver
6 written by Donald Becker. Modifications to support the EISA
7 version of the card by Paul Gortmaker and Leonard N. Zubkoff.
9 This software may be used and distributed according to the terms
10 of the GNU General Public License, incorporated herein by reference.
14 The SMC Ultra32C card uses the SMC 83c790 chip which is also
15 found on the ISA SMC Ultra cards. It has a shared memory mode of
16 operation that makes it similar to the ISA version of the card.
17 The main difference is that the EISA card has 32KB of RAM, but
18 only an 8KB window into that memory. The EISA card also can be
19 set for a bus-mastering mode of operation via the ECU, but that
20 is not (and probably will never be) supported by this driver.
21 The ECU should be run to enable shared memory and to disable the
22 bus-mastering feature for use with linux.
24 By programming the 8390 to use only 8KB RAM, the modifications
25 to the ISA driver can be limited to the probe and initialization
26 code. This allows easy integration of EISA support into the ISA
27 driver. However, the driver development kit from SMC provided the
28 register information for sliding the 8KB window, and hence the 8390
29 is programmed to use the full 32KB RAM.
31 Unfortunately this required code changes outside the probe/init
32 routines, and thus we decided to separate the EISA driver from
33 the ISA one. In this way, ISA users don't end up with a larger
34 driver due to the EISA code, and EISA users don't end up with a
35 larger driver due to the ISA EtherEZ PIO code. The driver is
36 similar to the 3c503/16 driver, in that the window must be set
37 back to the 1st 8KB of space for access to the two 8390 Tx slots.
39 In testing, using only 8KB RAM (3 Tx / 5 Rx) didn't appear to
40 be a limiting factor, since the EISA bus could get packets off
41 the card fast enough, but having the use of lots of RAM as Rx
42 space is extra insurance if interrupt latencies become excessive.
46 static const char *version = "smc-ultra32.c: 06/97 v1.00\n";
49 #include <linux/module.h>
50 #include <linux/eisa.h>
51 #include <linux/kernel.h>
52 #include <linux/errno.h>
53 #include <linux/string.h>
54 #include <linux/init.h>
55 #include <linux/interrupt.h>
56 #include <linux/netdevice.h>
57 #include <linux/etherdevice.h>
60 #include <asm/system.h>
64 #define DRV_NAME "smc-ultra32"
66 static int ultra32_probe1(struct net_device *dev, int ioaddr);
67 static int ultra32_open(struct net_device *dev);
68 static void ultra32_reset_8390(struct net_device *dev);
69 static void ultra32_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
71 static void ultra32_block_input(struct net_device *dev, int count,
72 struct sk_buff *skb, int ring_offset);
73 static void ultra32_block_output(struct net_device *dev, int count,
74 const unsigned char *buf,
75 const int start_page);
76 static int ultra32_close(struct net_device *dev);
78 #define ULTRA32_CMDREG 0 /* Offset to ASIC command register. */
79 #define ULTRA32_RESET 0x80 /* Board reset, in ULTRA32_CMDREG. */
80 #define ULTRA32_MEMENB 0x40 /* Enable the shared memory. */
81 #define ULTRA32_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
82 #define ULTRA32_IO_EXTENT 32
83 #define EN0_ERWCNT 0x08 /* Early receive warning count. */
86 * Defines that apply only to the Ultra32 EISA card. Note that
87 * "smc" = 10011 01101 00011 = 0x4da3, and hence !smc8010.cfg translates
88 * into an EISA ID of 0x1080A34D
90 #define ULTRA32_BASE 0xca0
91 #define ULTRA32_ID 0x1080a34d
92 #define ULTRA32_IDPORT (-0x20) /* 0xc80 */
93 /* Config regs 1->7 from the EISA !SMC8010.CFG file. */
94 #define ULTRA32_CFG1 0x04 /* 0xca4 */
95 #define ULTRA32_CFG2 0x05 /* 0xca5 */
96 #define ULTRA32_CFG3 (-0x18) /* 0xc88 */
97 #define ULTRA32_CFG4 (-0x17) /* 0xc89 */
98 #define ULTRA32_CFG5 (-0x16) /* 0xc8a */
99 #define ULTRA32_CFG6 (-0x15) /* 0xc8b */
100 #define ULTRA32_CFG7 0x0d /* 0xcad */
102 static void cleanup_card(struct net_device *dev)
104 int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET;
105 /* NB: ultra32_close_card() does free_irq */
106 release_region(ioaddr, ULTRA32_IO_EXTENT);
107 iounmap(ei_status.mem);
110 /* Probe for the Ultra32. This looks like a 8013 with the station
111 address PROM at I/O ports <base>+8 to <base>+13, with a checksum
115 struct net_device * __init ultra32_probe(int unit)
117 struct net_device *dev;
123 return ERR_PTR(-ENODEV);
125 dev = alloc_ei_netdev();
128 return ERR_PTR(-ENOMEM);
131 sprintf(dev->name, "eth%d", unit);
132 netdev_boot_setup_check(dev);
137 /* EISA spec allows for up to 16 slots, but 8 is typical. */
138 for (base = 0x1000 + ULTRA32_BASE; base < 0x9000; base += 0x1000) {
139 if (ultra32_probe1(dev, base) == 0)
145 err = register_netdev(dev);
157 static const struct net_device_ops ultra32_netdev_ops = {
158 .ndo_open = ultra32_open,
159 .ndo_stop = ultra32_close,
160 .ndo_start_xmit = ei_start_xmit,
161 .ndo_tx_timeout = ei_tx_timeout,
162 .ndo_get_stats = ei_get_stats,
163 .ndo_set_multicast_list = ei_set_multicast_list,
164 .ndo_validate_addr = eth_validate_addr,
165 .ndo_set_mac_address = eth_mac_addr,
166 .ndo_change_mtu = eth_change_mtu,
167 #ifdef CONFIG_NET_POLL_CONTROLLER
168 .ndo_poll_controller = ei_poll,
172 static int __init ultra32_probe1(struct net_device *dev, int ioaddr)
174 int i, edge, media, retval;
176 const char *model_name;
177 static unsigned version_printed;
178 /* Values from various config regs. */
181 const char *ifmap[] = {"UTP No Link", "", "UTP/AUI", "UTP/BNC"};
183 if (!request_region(ioaddr, ULTRA32_IO_EXTENT, DRV_NAME))
186 if (inb(ioaddr + ULTRA32_IDPORT) == 0xff ||
187 inl(ioaddr + ULTRA32_IDPORT) != ULTRA32_ID) {
192 media = inb(ioaddr + ULTRA32_CFG7) & 0x03;
193 edge = inb(ioaddr + ULTRA32_CFG5) & 0x08;
194 printk("SMC Ultra32 in EISA Slot %d, Media: %s, %s IRQs.\n",
195 ioaddr >> 12, ifmap[media],
196 (edge ? "Edge Triggered" : "Level Sensitive"));
198 idreg = inb(ioaddr + 7);
199 reg4 = inb(ioaddr + 4) & 0x7f;
201 /* Check the ID nibble. */
202 if ((idreg & 0xf0) != 0x20) { /* SMC Ultra */
207 /* Select the station address register set. */
208 outb(reg4, ioaddr + 4);
210 for (i = 0; i < 8; i++)
211 checksum += inb(ioaddr + 8 + i);
212 if ((checksum & 0xff) != 0xff) {
217 if (ei_debug && version_printed++ == 0)
220 model_name = "SMC Ultra32";
222 for (i = 0; i < 6; i++)
223 dev->dev_addr[i] = inb(ioaddr + 8 + i);
225 printk("%s: %s at 0x%X, %pM",
226 dev->name, model_name, ioaddr, dev->dev_addr);
228 /* Switch from the station address to the alternate register set and
229 read the useful registers there. */
230 outb(0x80 | reg4, ioaddr + 4);
232 /* Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
233 outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
235 /* Reset RAM addr. */
236 outb(0x00, ioaddr + 0x0b);
238 /* Switch back to the station address register set so that the
239 MS-DOS driver can find the card after a warm boot. */
240 outb(reg4, ioaddr + 4);
242 if ((inb(ioaddr + ULTRA32_CFG5) & 0x40) == 0) {
243 printk("\nsmc-ultra32: Card RAM is disabled! "
244 "Run EISA config utility.\n");
248 if ((inb(ioaddr + ULTRA32_CFG2) & 0x04) == 0)
249 printk("\nsmc-ultra32: Ignoring Bus-Master enable bit. "
250 "Run EISA config utility.\n");
253 unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};
254 int irq = irqmap[inb(ioaddr + ULTRA32_CFG5) & 0x07];
256 printk(", failed to detect IRQ line.\n");
263 /* The 8390 isn't at the base address, so fake the offset */
264 dev->base_addr = ioaddr + ULTRA32_NIC_OFFSET;
266 /* Save RAM address in the unused reg0 to avoid excess inb's. */
267 ei_status.reg0 = inb(ioaddr + ULTRA32_CFG3) & 0xfc;
269 dev->mem_start = 0xc0000 + ((ei_status.reg0 & 0x7c) << 11);
271 ei_status.name = model_name;
272 ei_status.word16 = 1;
273 ei_status.tx_start_page = 0;
274 ei_status.rx_start_page = TX_PAGES;
275 /* All Ultra32 cards have 32KB memory with an 8KB window. */
276 ei_status.stop_page = 128;
278 ei_status.mem = ioremap(dev->mem_start, 0x2000);
279 if (!ei_status.mem) {
280 printk(", failed to ioremap.\n");
284 dev->mem_end = dev->mem_start + 0x1fff;
286 printk(", IRQ %d, 32KB memory, 8KB window at 0x%lx-0x%lx.\n",
287 dev->irq, dev->mem_start, dev->mem_end);
288 ei_status.block_input = &ultra32_block_input;
289 ei_status.block_output = &ultra32_block_output;
290 ei_status.get_8390_hdr = &ultra32_get_8390_hdr;
291 ei_status.reset_8390 = &ultra32_reset_8390;
293 dev->netdev_ops = &ultra32_netdev_ops;
298 release_region(ioaddr, ULTRA32_IO_EXTENT);
302 static int ultra32_open(struct net_device *dev)
304 int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* ASIC addr */
305 int irq_flags = (inb(ioaddr + ULTRA32_CFG5) & 0x08) ? 0 : IRQF_SHARED;
308 retval = request_irq(dev->irq, ei_interrupt, irq_flags, dev->name, dev);
312 outb(ULTRA32_MEMENB, ioaddr); /* Enable Shared Memory. */
313 outb(0x80, ioaddr + ULTRA32_CFG6); /* Enable Interrupts. */
314 outb(0x84, ioaddr + 5); /* Enable MEM16 & Disable Bus Master. */
315 outb(0x01, ioaddr + 6); /* Enable Interrupts. */
316 /* Set the early receive warning level in window 0 high enough not
317 to receive ERW interrupts. */
318 outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);
319 outb(0xff, dev->base_addr + EN0_ERWCNT);
324 static int ultra32_close(struct net_device *dev)
326 int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* CMDREG */
328 netif_stop_queue(dev);
331 printk("%s: Shutting down ethercard.\n", dev->name);
333 outb(0x00, ioaddr + ULTRA32_CFG6); /* Disable Interrupts. */
334 outb(0x00, ioaddr + 6); /* Disable interrupts. */
335 free_irq(dev->irq, dev);
342 static void ultra32_reset_8390(struct net_device *dev)
344 int ioaddr = dev->base_addr - ULTRA32_NIC_OFFSET; /* ASIC base addr */
346 outb(ULTRA32_RESET, ioaddr);
347 if (ei_debug > 1) printk("resetting Ultra32, t=%ld...", jiffies);
350 outb(ULTRA32_MEMENB, ioaddr); /* Enable Shared Memory. */
351 outb(0x80, ioaddr + ULTRA32_CFG6); /* Enable Interrupts. */
352 outb(0x84, ioaddr + 5); /* Enable MEM16 & Disable Bus Master. */
353 outb(0x01, ioaddr + 6); /* Enable Interrupts. */
354 if (ei_debug > 1) printk("reset done\n");
358 /* Grab the 8390 specific header. Similar to the block_input routine, but
359 we don't need to be concerned with ring wrap as the header will be at
360 the start of a page, so we optimize accordingly. */
362 static void ultra32_get_8390_hdr(struct net_device *dev,
363 struct e8390_pkt_hdr *hdr,
366 void __iomem *hdr_start = ei_status.mem + ((ring_page & 0x1f) << 8);
367 unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;
369 /* Select correct 8KB Window. */
370 outb(ei_status.reg0 | ((ring_page & 0x60) >> 5), RamReg);
373 /* Officially this is what we are doing, but the readl() is faster */
374 /* unfortunately it isn't endian aware of the struct */
375 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
376 hdr->count = le16_to_cpu(hdr->count);
378 ((unsigned int*)hdr)[0] = readl(hdr_start);
382 /* Block input and output are easy on shared memory ethercards, the only
383 complication is when the ring buffer wraps, or in this case, when a
384 packet spans an 8KB boundary. Note that the current 8KB segment is
385 already set by the get_8390_hdr routine. */
387 static void ultra32_block_input(struct net_device *dev,
392 void __iomem *xfer_start = ei_status.mem + (ring_offset & 0x1fff);
393 unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;
395 if ((ring_offset & ~0x1fff) != ((ring_offset + count - 1) & ~0x1fff)) {
396 int semi_count = 8192 - (ring_offset & 0x1FFF);
397 memcpy_fromio(skb->data, xfer_start, semi_count);
399 if (ring_offset < 96*256) {
400 /* Select next 8KB Window. */
401 ring_offset += semi_count;
402 outb(ei_status.reg0 | ((ring_offset & 0x6000) >> 13), RamReg);
403 memcpy_fromio(skb->data + semi_count, ei_status.mem, count);
405 /* Select first 8KB Window. */
406 outb(ei_status.reg0, RamReg);
407 memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
410 memcpy_fromio(skb->data, xfer_start, count);
414 static void ultra32_block_output(struct net_device *dev,
416 const unsigned char *buf,
419 void __iomem *xfer_start = ei_status.mem + (start_page<<8);
420 unsigned int RamReg = dev->base_addr - ULTRA32_NIC_OFFSET + ULTRA32_CFG3;
422 /* Select first 8KB Window. */
423 outb(ei_status.reg0, RamReg);
425 memcpy_toio(xfer_start, buf, count);
429 #define MAX_ULTRA32_CARDS 4 /* Max number of Ultra cards per module */
430 static struct net_device *dev_ultra[MAX_ULTRA32_CARDS];
432 MODULE_DESCRIPTION("SMC Ultra32 EISA ethernet driver");
433 MODULE_LICENSE("GPL");
435 int __init init_module(void)
437 int this_dev, found = 0;
439 for (this_dev = 0; this_dev < MAX_ULTRA32_CARDS; this_dev++) {
440 struct net_device *dev = ultra32_probe(-1);
443 dev_ultra[found++] = dev;
447 printk(KERN_WARNING "smc-ultra32.c: No SMC Ultra32 found.\n");
451 void __exit cleanup_module(void)
455 for (this_dev = 0; this_dev < MAX_ULTRA32_CARDS; this_dev++) {
456 struct net_device *dev = dev_ultra[this_dev];
458 unregister_netdev(dev);