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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Amiga Linux/m68k and Linux/PPC Zorro NS8390 Ethernet Driver
4 *
5 * (C) Copyright 1998-2000 by some Elitist 680x0 Users(TM)
6 *
7 * ---------------------------------------------------------------------------
8 *
9 * This program is based on all the other NE2000 drivers for Linux
10 *
11 * ---------------------------------------------------------------------------
12 *
13 * The Ariadne II and X-Surf are Zorro-II boards containing Realtek RTL8019AS
14 * Ethernet Controllers.
15 */
16
17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include <linux/module.h>
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/init.h>
23#include <linux/delay.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/zorro.h>
27#include <linux/jiffies.h>
28
29#include <asm/irq.h>
30#include <asm/amigaints.h>
31#include <asm/amigahw.h>
32
33#define EI_SHIFT(x) (ei_local->reg_offset[x])
34#define ei_inb(port) in_8(port)
35#define ei_outb(val, port) out_8(port, val)
36#define ei_inb_p(port) in_8(port)
37#define ei_outb_p(val, port) out_8(port, val)
38
39static const char version[] =
40 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
41
42#include "lib8390.c"
43
44#define DRV_NAME "zorro8390"
45
46#define NE_BASE (dev->base_addr)
47#define NE_CMD (0x00 * 2)
48#define NE_DATAPORT (0x10 * 2) /* NatSemi-defined port window offset */
49#define NE_RESET (0x1f * 2) /* Issue a read to reset,
50 * a write to clear. */
51#define NE_IO_EXTENT (0x20 * 2)
52
53#define NE_EN0_ISR (0x07 * 2)
54#define NE_EN0_DCFG (0x0e * 2)
55
56#define NE_EN0_RSARLO (0x08 * 2)
57#define NE_EN0_RSARHI (0x09 * 2)
58#define NE_EN0_RCNTLO (0x0a * 2)
59#define NE_EN0_RXCR (0x0c * 2)
60#define NE_EN0_TXCR (0x0d * 2)
61#define NE_EN0_RCNTHI (0x0b * 2)
62#define NE_EN0_IMR (0x0f * 2)
63
64#define NESM_START_PG 0x40 /* First page of TX buffer */
65#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
66
67#define WORDSWAP(a) ((((a) >> 8) & 0xff) | ((a) << 8))
68
69static struct card_info {
70 zorro_id id;
71 const char *name;
72 unsigned int offset;
73} cards[] = {
74 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
75 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
76};
77
78/* Hard reset the card. This used to pause for the same period that a
79 * 8390 reset command required, but that shouldn't be necessary.
80 */
81static void zorro8390_reset_8390(struct net_device *dev)
82{
83 unsigned long reset_start_time = jiffies;
84 struct ei_device *ei_local = netdev_priv(dev);
85
86 netif_dbg(ei_local, hw, dev, "resetting - t=%ld...\n", jiffies);
87
88 z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
89
90 ei_status.txing = 0;
91 ei_status.dmaing = 0;
92
93 /* This check _should_not_ be necessary, omit eventually. */
94 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RESET) == 0)
95 if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
96 netdev_warn(dev, "%s: did not complete\n", __func__);
97 break;
98 }
99 z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr */
100}
101
102/* Grab the 8390 specific header. Similar to the block_input routine, but
103 * we don't need to be concerned with ring wrap as the header will be at
104 * the start of a page, so we optimize accordingly.
105 */
106static void zorro8390_get_8390_hdr(struct net_device *dev,
107 struct e8390_pkt_hdr *hdr, int ring_page)
108{
109 int nic_base = dev->base_addr;
110 int cnt;
111 short *ptrs;
112
113 /* This *shouldn't* happen.
114 * If it does, it's the last thing you'll see
115 */
116 if (ei_status.dmaing) {
117 netdev_warn(dev,
118 "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
119 __func__, ei_status.dmaing, ei_status.irqlock);
120 return;
121 }
122
123 ei_status.dmaing |= 0x01;
124 z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
125 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
126 z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
127 z_writeb(0, nic_base + NE_EN0_RCNTHI);
128 z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
129 z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
130 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
131
132 ptrs = (short *)hdr;
133 for (cnt = 0; cnt < sizeof(struct e8390_pkt_hdr) >> 1; cnt++)
134 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
135
136 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */
137
138 hdr->count = WORDSWAP(hdr->count);
139
140 ei_status.dmaing &= ~0x01;
141}
142
143/* Block input and output, similar to the Crynwr packet driver.
144 * If you are porting to a new ethercard, look at the packet driver source
145 * for hints. The NEx000 doesn't share the on-board packet memory --
146 * you have to put the packet out through the "remote DMA" dataport
147 * using z_writeb.
148 */
149static void zorro8390_block_input(struct net_device *dev, int count,
150 struct sk_buff *skb, int ring_offset)
151{
152 int nic_base = dev->base_addr;
153 char *buf = skb->data;
154 short *ptrs;
155 int cnt;
156
157 /* This *shouldn't* happen.
158 * If it does, it's the last thing you'll see
159 */
160 if (ei_status.dmaing) {
161 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
162 __func__, ei_status.dmaing, ei_status.irqlock);
163 return;
164 }
165 ei_status.dmaing |= 0x01;
166 z_writeb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
167 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
168 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
169 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
170 z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
171 z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
172 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
173 ptrs = (short *)buf;
174 for (cnt = 0; cnt < count >> 1; cnt++)
175 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
176 if (count & 0x01)
177 buf[count - 1] = z_readb(NE_BASE + NE_DATAPORT);
178
179 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */
180 ei_status.dmaing &= ~0x01;
181}
182
183static void zorro8390_block_output(struct net_device *dev, int count,
184 const unsigned char *buf,
185 const int start_page)
186{
187 int nic_base = NE_BASE;
188 unsigned long dma_start;
189 short *ptrs;
190 int cnt;
191
192 /* Round the count up for word writes. Do we need to do this?
193 * What effect will an odd byte count have on the 8390?
194 * I should check someday.
195 */
196 if (count & 0x01)
197 count++;
198
199 /* This *shouldn't* happen.
200 * If it does, it's the last thing you'll see
201 */
202 if (ei_status.dmaing) {
203 netdev_err(dev, "%s: DMAing conflict [DMAstat:%d][irqlock:%d]\n",
204 __func__, ei_status.dmaing, ei_status.irqlock);
205 return;
206 }
207 ei_status.dmaing |= 0x01;
208 /* We should already be in page 0, but to be safe... */
209 z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
210
211 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
212
213 /* Now the normal output. */
214 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
215 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
216 z_writeb(0x00, nic_base + NE_EN0_RSARLO);
217 z_writeb(start_page, nic_base + NE_EN0_RSARHI);
218
219 z_writeb(E8390_RWRITE + E8390_START, nic_base + NE_CMD);
220 ptrs = (short *)buf;
221 for (cnt = 0; cnt < count >> 1; cnt++)
222 z_writew(*ptrs++, NE_BASE + NE_DATAPORT);
223
224 dma_start = jiffies;
225
226 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
227 if (time_after(jiffies, dma_start + 2 * HZ / 100)) {
228 /* 20ms */
229 netdev_warn(dev, "timeout waiting for Tx RDC\n");
230 zorro8390_reset_8390(dev);
231 __NS8390_init(dev, 1);
232 break;
233 }
234
235 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr */
236 ei_status.dmaing &= ~0x01;
237}
238
239static int zorro8390_open(struct net_device *dev)
240{
241 __ei_open(dev);
242 return 0;
243}
244
245static int zorro8390_close(struct net_device *dev)
246{
247 struct ei_device *ei_local = netdev_priv(dev);
248
249 netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard\n");
250 __ei_close(dev);
251 return 0;
252}
253
254static void zorro8390_remove_one(struct zorro_dev *z)
255{
256 struct net_device *dev = zorro_get_drvdata(z);
257
258 unregister_netdev(dev);
259 free_irq(IRQ_AMIGA_PORTS, dev);
260 release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT * 2);
261 free_netdev(dev);
262}
263
264static struct zorro_device_id zorro8390_zorro_tbl[] = {
265 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
266 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
267 { 0 }
268};
269MODULE_DEVICE_TABLE(zorro, zorro8390_zorro_tbl);
270
271static const struct net_device_ops zorro8390_netdev_ops = {
272 .ndo_open = zorro8390_open,
273 .ndo_stop = zorro8390_close,
274 .ndo_start_xmit = __ei_start_xmit,
275 .ndo_tx_timeout = __ei_tx_timeout,
276 .ndo_get_stats = __ei_get_stats,
277 .ndo_set_rx_mode = __ei_set_multicast_list,
278 .ndo_validate_addr = eth_validate_addr,
279 .ndo_set_mac_address = eth_mac_addr,
280#ifdef CONFIG_NET_POLL_CONTROLLER
281 .ndo_poll_controller = __ei_poll,
282#endif
283};
284
285static int zorro8390_init(struct net_device *dev, unsigned long board,
286 const char *name, void __iomem *ioaddr)
287{
288 int i;
289 int err;
290 unsigned char SA_prom[32];
291 int start_page, stop_page;
292 static u32 zorro8390_offsets[16] = {
293 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
294 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
295 };
296
297 /* Reset card. Who knows what dain-bramaged state it was left in. */
298 {
299 unsigned long reset_start_time = jiffies;
300
301 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
302
303 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
304 if (time_after(jiffies,
305 reset_start_time + 2 * HZ / 100)) {
306 netdev_warn(dev, "not found (no reset ack)\n");
307 return -ENODEV;
308 }
309
310 z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
311 }
312
313 /* Read the 16 bytes of station address PROM.
314 * We must first initialize registers,
315 * similar to NS8390_init(eifdev, 0).
316 * We can't reliably read the SAPROM address without this.
317 * (I learned the hard way!).
318 */
319 {
320 static const struct {
321 u32 value;
322 u32 offset;
323 } program_seq[] = {
324 {E8390_NODMA + E8390_PAGE0 + E8390_STOP, NE_CMD},
325 /* Select page 0 */
326 {0x48, NE_EN0_DCFG}, /* 0x48: Set byte-wide access */
327 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs */
328 {0x00, NE_EN0_RCNTHI},
329 {0x00, NE_EN0_IMR}, /* Mask completion irq */
330 {0xFF, NE_EN0_ISR},
331 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
332 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode */
333 {32, NE_EN0_RCNTLO},
334 {0x00, NE_EN0_RCNTHI},
335 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000 */
336 {0x00, NE_EN0_RSARHI},
337 {E8390_RREAD + E8390_START, NE_CMD},
338 };
339 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
340 z_writeb(program_seq[i].value,
341 ioaddr + program_seq[i].offset);
342 }
343 for (i = 0; i < 16; i++) {
344 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
345 (void)z_readb(ioaddr + NE_DATAPORT);
346 }
347
348 /* We must set the 8390 for word mode. */
349 z_writeb(0x49, ioaddr + NE_EN0_DCFG);
350 start_page = NESM_START_PG;
351 stop_page = NESM_STOP_PG;
352
353 dev->base_addr = (unsigned long)ioaddr;
354 dev->irq = IRQ_AMIGA_PORTS;
355
356 /* Install the Interrupt handler */
357 i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt,
358 IRQF_SHARED, DRV_NAME, dev);
359 if (i)
360 return i;
361
362 eth_hw_addr_set(dev, SA_prom);
363
364 pr_debug("Found ethernet address: %pM\n", dev->dev_addr);
365
366 ei_status.name = name;
367 ei_status.tx_start_page = start_page;
368 ei_status.stop_page = stop_page;
369 ei_status.word16 = 1;
370
371 ei_status.rx_start_page = start_page + TX_PAGES;
372
373 ei_status.reset_8390 = zorro8390_reset_8390;
374 ei_status.block_input = zorro8390_block_input;
375 ei_status.block_output = zorro8390_block_output;
376 ei_status.get_8390_hdr = zorro8390_get_8390_hdr;
377 ei_status.reg_offset = zorro8390_offsets;
378
379 dev->netdev_ops = &zorro8390_netdev_ops;
380 __NS8390_init(dev, 0);
381
382 err = register_netdev(dev);
383 if (err) {
384 free_irq(IRQ_AMIGA_PORTS, dev);
385 return err;
386 }
387
388 netdev_info(dev, "%s at 0x%08lx, Ethernet Address %pM\n",
389 name, board, dev->dev_addr);
390
391 return 0;
392}
393
394static int zorro8390_init_one(struct zorro_dev *z,
395 const struct zorro_device_id *ent)
396{
397 struct net_device *dev;
398 unsigned long board, ioaddr;
399 int err, i;
400
401 for (i = ARRAY_SIZE(cards) - 1; i >= 0; i--)
402 if (z->id == cards[i].id)
403 break;
404 if (i < 0)
405 return -ENODEV;
406
407 board = z->resource.start;
408 ioaddr = board + cards[i].offset;
409 dev = ____alloc_ei_netdev(0);
410 if (!dev)
411 return -ENOMEM;
412 if (!request_mem_region(ioaddr, NE_IO_EXTENT * 2, DRV_NAME)) {
413 free_netdev(dev);
414 return -EBUSY;
415 }
416 err = zorro8390_init(dev, board, cards[i].name, ZTWO_VADDR(ioaddr));
417 if (err) {
418 release_mem_region(ioaddr, NE_IO_EXTENT * 2);
419 free_netdev(dev);
420 return err;
421 }
422 zorro_set_drvdata(z, dev);
423 return 0;
424}
425
426static struct zorro_driver zorro8390_driver = {
427 .name = "zorro8390",
428 .id_table = zorro8390_zorro_tbl,
429 .probe = zorro8390_init_one,
430 .remove = zorro8390_remove_one,
431};
432
433static int __init zorro8390_init_module(void)
434{
435 return zorro_register_driver(&zorro8390_driver);
436}
437
438static void __exit zorro8390_cleanup_module(void)
439{
440 zorro_unregister_driver(&zorro8390_driver);
441}
442
443module_init(zorro8390_init_module);
444module_exit(zorro8390_cleanup_module);
445
446MODULE_DESCRIPTION("Zorro NS8390-based ethernet driver");
447MODULE_LICENSE("GPL");