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
);
156 static int __init
ultra32_probe1(struct net_device
*dev
, int ioaddr
)
158 int i
, edge
, media
, retval
;
160 const char *model_name
;
161 static unsigned version_printed
;
162 /* Values from various config regs. */
165 const char *ifmap
[] = {"UTP No Link", "", "UTP/AUI", "UTP/BNC"};
167 if (!request_region(ioaddr
, ULTRA32_IO_EXTENT
, DRV_NAME
))
170 if (inb(ioaddr
+ ULTRA32_IDPORT
) == 0xff ||
171 inl(ioaddr
+ ULTRA32_IDPORT
) != ULTRA32_ID
) {
176 media
= inb(ioaddr
+ ULTRA32_CFG7
) & 0x03;
177 edge
= inb(ioaddr
+ ULTRA32_CFG5
) & 0x08;
178 printk("SMC Ultra32 in EISA Slot %d, Media: %s, %s IRQs.\n",
179 ioaddr
>> 12, ifmap
[media
],
180 (edge
? "Edge Triggered" : "Level Sensitive"));
182 idreg
= inb(ioaddr
+ 7);
183 reg4
= inb(ioaddr
+ 4) & 0x7f;
185 /* Check the ID nibble. */
186 if ((idreg
& 0xf0) != 0x20) { /* SMC Ultra */
191 /* Select the station address register set. */
192 outb(reg4
, ioaddr
+ 4);
194 for (i
= 0; i
< 8; i
++)
195 checksum
+= inb(ioaddr
+ 8 + i
);
196 if ((checksum
& 0xff) != 0xff) {
201 if (ei_debug
&& version_printed
++ == 0)
204 model_name
= "SMC Ultra32";
206 for (i
= 0; i
< 6; i
++)
207 dev
->dev_addr
[i
] = inb(ioaddr
+ 8 + i
);
209 printk("%s: %s at 0x%X, %pM",
210 dev
->name
, model_name
, ioaddr
, dev
->dev_addr
);
212 /* Switch from the station address to the alternate register set and
213 read the useful registers there. */
214 outb(0x80 | reg4
, ioaddr
+ 4);
216 /* Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */
217 outb(0x80 | inb(ioaddr
+ 0x0c), ioaddr
+ 0x0c);
219 /* Reset RAM addr. */
220 outb(0x00, ioaddr
+ 0x0b);
222 /* Switch back to the station address register set so that the
223 MS-DOS driver can find the card after a warm boot. */
224 outb(reg4
, ioaddr
+ 4);
226 if ((inb(ioaddr
+ ULTRA32_CFG5
) & 0x40) == 0) {
227 printk("\nsmc-ultra32: Card RAM is disabled! "
228 "Run EISA config utility.\n");
232 if ((inb(ioaddr
+ ULTRA32_CFG2
) & 0x04) == 0)
233 printk("\nsmc-ultra32: Ignoring Bus-Master enable bit. "
234 "Run EISA config utility.\n");
237 unsigned char irqmap
[] = {0, 9, 3, 5, 7, 10, 11, 15};
238 int irq
= irqmap
[inb(ioaddr
+ ULTRA32_CFG5
) & 0x07];
240 printk(", failed to detect IRQ line.\n");
247 /* The 8390 isn't at the base address, so fake the offset */
248 dev
->base_addr
= ioaddr
+ ULTRA32_NIC_OFFSET
;
250 /* Save RAM address in the unused reg0 to avoid excess inb's. */
251 ei_status
.reg0
= inb(ioaddr
+ ULTRA32_CFG3
) & 0xfc;
253 dev
->mem_start
= 0xc0000 + ((ei_status
.reg0
& 0x7c) << 11);
255 ei_status
.name
= model_name
;
256 ei_status
.word16
= 1;
257 ei_status
.tx_start_page
= 0;
258 ei_status
.rx_start_page
= TX_PAGES
;
259 /* All Ultra32 cards have 32KB memory with an 8KB window. */
260 ei_status
.stop_page
= 128;
262 ei_status
.mem
= ioremap(dev
->mem_start
, 0x2000);
263 if (!ei_status
.mem
) {
264 printk(", failed to ioremap.\n");
268 dev
->mem_end
= dev
->mem_start
+ 0x1fff;
270 printk(", IRQ %d, 32KB memory, 8KB window at 0x%lx-0x%lx.\n",
271 dev
->irq
, dev
->mem_start
, dev
->mem_end
);
272 ei_status
.block_input
= &ultra32_block_input
;
273 ei_status
.block_output
= &ultra32_block_output
;
274 ei_status
.get_8390_hdr
= &ultra32_get_8390_hdr
;
275 ei_status
.reset_8390
= &ultra32_reset_8390
;
276 dev
->open
= &ultra32_open
;
277 dev
->stop
= &ultra32_close
;
278 #ifdef CONFIG_NET_POLL_CONTROLLER
279 dev
->poll_controller
= ei_poll
;
285 release_region(ioaddr
, ULTRA32_IO_EXTENT
);
289 static int ultra32_open(struct net_device
*dev
)
291 int ioaddr
= dev
->base_addr
- ULTRA32_NIC_OFFSET
; /* ASIC addr */
292 int irq_flags
= (inb(ioaddr
+ ULTRA32_CFG5
) & 0x08) ? 0 : IRQF_SHARED
;
295 retval
= request_irq(dev
->irq
, ei_interrupt
, irq_flags
, dev
->name
, dev
);
299 outb(ULTRA32_MEMENB
, ioaddr
); /* Enable Shared Memory. */
300 outb(0x80, ioaddr
+ ULTRA32_CFG6
); /* Enable Interrupts. */
301 outb(0x84, ioaddr
+ 5); /* Enable MEM16 & Disable Bus Master. */
302 outb(0x01, ioaddr
+ 6); /* Enable Interrupts. */
303 /* Set the early receive warning level in window 0 high enough not
304 to receive ERW interrupts. */
305 outb_p(E8390_NODMA
+E8390_PAGE0
, dev
->base_addr
);
306 outb(0xff, dev
->base_addr
+ EN0_ERWCNT
);
311 static int ultra32_close(struct net_device
*dev
)
313 int ioaddr
= dev
->base_addr
- ULTRA32_NIC_OFFSET
; /* CMDREG */
315 netif_stop_queue(dev
);
318 printk("%s: Shutting down ethercard.\n", dev
->name
);
320 outb(0x00, ioaddr
+ ULTRA32_CFG6
); /* Disable Interrupts. */
321 outb(0x00, ioaddr
+ 6); /* Disable interrupts. */
322 free_irq(dev
->irq
, dev
);
329 static void ultra32_reset_8390(struct net_device
*dev
)
331 int ioaddr
= dev
->base_addr
- ULTRA32_NIC_OFFSET
; /* ASIC base addr */
333 outb(ULTRA32_RESET
, ioaddr
);
334 if (ei_debug
> 1) printk("resetting Ultra32, t=%ld...", jiffies
);
337 outb(ULTRA32_MEMENB
, ioaddr
); /* Enable Shared Memory. */
338 outb(0x80, ioaddr
+ ULTRA32_CFG6
); /* Enable Interrupts. */
339 outb(0x84, ioaddr
+ 5); /* Enable MEM16 & Disable Bus Master. */
340 outb(0x01, ioaddr
+ 6); /* Enable Interrupts. */
341 if (ei_debug
> 1) printk("reset done\n");
345 /* Grab the 8390 specific header. Similar to the block_input routine, but
346 we don't need to be concerned with ring wrap as the header will be at
347 the start of a page, so we optimize accordingly. */
349 static void ultra32_get_8390_hdr(struct net_device
*dev
,
350 struct e8390_pkt_hdr
*hdr
,
353 void __iomem
*hdr_start
= ei_status
.mem
+ ((ring_page
& 0x1f) << 8);
354 unsigned int RamReg
= dev
->base_addr
- ULTRA32_NIC_OFFSET
+ ULTRA32_CFG3
;
356 /* Select correct 8KB Window. */
357 outb(ei_status
.reg0
| ((ring_page
& 0x60) >> 5), RamReg
);
360 /* Officially this is what we are doing, but the readl() is faster */
361 /* unfortunately it isn't endian aware of the struct */
362 memcpy_fromio(hdr
, hdr_start
, sizeof(struct e8390_pkt_hdr
));
363 hdr
->count
= le16_to_cpu(hdr
->count
);
365 ((unsigned int*)hdr
)[0] = readl(hdr_start
);
369 /* Block input and output are easy on shared memory ethercards, the only
370 complication is when the ring buffer wraps, or in this case, when a
371 packet spans an 8KB boundary. Note that the current 8KB segment is
372 already set by the get_8390_hdr routine. */
374 static void ultra32_block_input(struct net_device
*dev
,
379 void __iomem
*xfer_start
= ei_status
.mem
+ (ring_offset
& 0x1fff);
380 unsigned int RamReg
= dev
->base_addr
- ULTRA32_NIC_OFFSET
+ ULTRA32_CFG3
;
382 if ((ring_offset
& ~0x1fff) != ((ring_offset
+ count
- 1) & ~0x1fff)) {
383 int semi_count
= 8192 - (ring_offset
& 0x1FFF);
384 memcpy_fromio(skb
->data
, xfer_start
, semi_count
);
386 if (ring_offset
< 96*256) {
387 /* Select next 8KB Window. */
388 ring_offset
+= semi_count
;
389 outb(ei_status
.reg0
| ((ring_offset
& 0x6000) >> 13), RamReg
);
390 memcpy_fromio(skb
->data
+ semi_count
, ei_status
.mem
, count
);
392 /* Select first 8KB Window. */
393 outb(ei_status
.reg0
, RamReg
);
394 memcpy_fromio(skb
->data
+ semi_count
, ei_status
.mem
+ TX_PAGES
* 256, count
);
397 memcpy_fromio(skb
->data
, xfer_start
, count
);
401 static void ultra32_block_output(struct net_device
*dev
,
403 const unsigned char *buf
,
406 void __iomem
*xfer_start
= ei_status
.mem
+ (start_page
<<8);
407 unsigned int RamReg
= dev
->base_addr
- ULTRA32_NIC_OFFSET
+ ULTRA32_CFG3
;
409 /* Select first 8KB Window. */
410 outb(ei_status
.reg0
, RamReg
);
412 memcpy_toio(xfer_start
, buf
, count
);
416 #define MAX_ULTRA32_CARDS 4 /* Max number of Ultra cards per module */
417 static struct net_device
*dev_ultra
[MAX_ULTRA32_CARDS
];
419 MODULE_DESCRIPTION("SMC Ultra32 EISA ethernet driver");
420 MODULE_LICENSE("GPL");
422 int __init
init_module(void)
424 int this_dev
, found
= 0;
426 for (this_dev
= 0; this_dev
< MAX_ULTRA32_CARDS
; this_dev
++) {
427 struct net_device
*dev
= ultra32_probe(-1);
430 dev_ultra
[found
++] = dev
;
434 printk(KERN_WARNING
"smc-ultra32.c: No SMC Ultra32 found.\n");
438 void __exit
cleanup_module(void)
442 for (this_dev
= 0; this_dev
< MAX_ULTRA32_CARDS
; this_dev
++) {
443 struct net_device
*dev
= dev_ultra
[this_dev
];
445 unregister_netdev(dev
);
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