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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Amiga Linux/68k A2065 Ethernet Driver
3 *
4 * (C) Copyright 1995-2003 by Geert Uytterhoeven <geert@linux-m68k.org>
5 *
6 * Fixes and tips by:
7 * - Janos Farkas (CHEXUM@sparta.banki.hu)
8 * - Jes Degn Soerensen (jds@kom.auc.dk)
9 * - Matt Domsch (Matt_Domsch@dell.com)
10 *
11 * ----------------------------------------------------------------------------
12 *
13 * This program is based on
14 *
15 * ariadne.?: Amiga Linux/68k Ariadne Ethernet Driver
16 * (C) Copyright 1995 by Geert Uytterhoeven,
17 * Peter De Schrijver
18 *
19 * lance.c: An AMD LANCE ethernet driver for linux.
20 * Written 1993-94 by Donald Becker.
21 *
22 * Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller
23 * Advanced Micro Devices
24 * Publication #16907, Rev. B, Amendment/0, May 1994
25 *
26 * ----------------------------------------------------------------------------
27 *
28 * This file is subject to the terms and conditions of the GNU General Public
29 * License. See the file COPYING in the main directory of the Linux
30 * distribution for more details.
31 *
32 * ----------------------------------------------------------------------------
33 *
34 * The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains:
35 *
36 * - an Am7990 Local Area Network Controller for Ethernet (LANCE) with
37 * both 10BASE-2 (thin coax) and AUI (DB-15) connectors
38 */
39
Joe Perches747e2522011-06-22 20:38:54 +000040#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
41
42/*#define DEBUG*/
43/*#define TEST_HITS*/
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/errno.h>
46#include <linux/netdevice.h>
47#include <linux/etherdevice.h>
48#include <linux/module.h>
49#include <linux/stddef.h>
50#include <linux/kernel.h>
51#include <linux/interrupt.h>
52#include <linux/ioport.h>
53#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include <linux/init.h>
56#include <linux/crc32.h>
57#include <linux/zorro.h>
58#include <linux/bitops.h>
59
60#include <asm/irq.h>
61#include <asm/amigaints.h>
62#include <asm/amigahw.h>
63
64#include "a2065.h"
65
Joe Perches747e2522011-06-22 20:38:54 +000066/* Transmit/Receive Ring Definitions */
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68#define LANCE_LOG_TX_BUFFERS (2)
69#define LANCE_LOG_RX_BUFFERS (4)
70
Joe Perches747e2522011-06-22 20:38:54 +000071#define TX_RING_SIZE (1 << LANCE_LOG_TX_BUFFERS)
72#define RX_RING_SIZE (1 << LANCE_LOG_RX_BUFFERS)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073
Joe Perches747e2522011-06-22 20:38:54 +000074#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
75#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77#define PKT_BUF_SIZE (1544)
78#define RX_BUFF_SIZE PKT_BUF_SIZE
79#define TX_BUFF_SIZE PKT_BUF_SIZE
80
Joe Perches747e2522011-06-22 20:38:54 +000081/* Layout of the Lance's RAM Buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
83struct lance_init_block {
84 unsigned short mode; /* Pre-set mode (reg. 15) */
85 unsigned char phys_addr[6]; /* Physical ethernet address */
86 unsigned filter[2]; /* Multicast filter. */
87
88 /* Receive and transmit ring base, along with extra bits. */
89 unsigned short rx_ptr; /* receive descriptor addr */
90 unsigned short rx_len; /* receive len and high addr */
91 unsigned short tx_ptr; /* transmit descriptor addr */
92 unsigned short tx_len; /* transmit len and high addr */
Jeff Garzik6aa20a22006-09-13 13:24:59 -040093
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
95 struct lance_rx_desc brx_ring[RX_RING_SIZE];
96 struct lance_tx_desc btx_ring[TX_RING_SIZE];
97
Joe Perches747e2522011-06-22 20:38:54 +000098 char rx_buf[RX_RING_SIZE][RX_BUFF_SIZE];
99 char tx_buf[TX_RING_SIZE][TX_BUFF_SIZE];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100};
101
Joe Perches747e2522011-06-22 20:38:54 +0000102/* Private Device Data */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104struct lance_private {
105 char *name;
106 volatile struct lance_regs *ll;
107 volatile struct lance_init_block *init_block; /* Hosts view */
108 volatile struct lance_init_block *lance_init_block; /* Lance view */
109
110 int rx_new, tx_new;
111 int rx_old, tx_old;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 int lance_log_rx_bufs, lance_log_tx_bufs;
114 int rx_ring_mod_mask, tx_ring_mod_mask;
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 int tpe; /* cable-selection is TPE */
117 int auto_select; /* cable-selection by carrier */
118 unsigned short busmaster_regval;
119
120#ifdef CONFIG_SUNLANCE
121 struct Linux_SBus_DMA *ledma; /* if set this points to ledma and arch=4m */
122 int burst_sizes; /* ledma SBus burst sizes */
123#endif
124 struct timer_list multicast_timer;
125};
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#define LANCE_ADDR(x) ((int)(x) & ~0xff000000)
128
129/* Load the CSR registers */
Joe Perches747e2522011-06-22 20:38:54 +0000130static void load_csrs(struct lance_private *lp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
132 volatile struct lance_regs *ll = lp->ll;
133 volatile struct lance_init_block *aib = lp->lance_init_block;
Joe Perches747e2522011-06-22 20:38:54 +0000134 int leptr = LANCE_ADDR(aib);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
136 ll->rap = LE_CSR1;
137 ll->rdp = (leptr & 0xFFFF);
138 ll->rap = LE_CSR2;
139 ll->rdp = leptr >> 16;
140 ll->rap = LE_CSR3;
141 ll->rdp = lp->busmaster_regval;
142
143 /* Point back to csr0 */
144 ll->rap = LE_CSR0;
145}
146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147/* Setup the Lance Rx and Tx rings */
Joe Perches747e2522011-06-22 20:38:54 +0000148static void lance_init_ring(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
150 struct lance_private *lp = netdev_priv(dev);
151 volatile struct lance_init_block *ib = lp->init_block;
Joe Perches747e2522011-06-22 20:38:54 +0000152 volatile struct lance_init_block *aib = lp->lance_init_block;
153 /* for LANCE_ADDR computations */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 int leptr;
155 int i;
156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 /* Lock out other processes while setting up hardware */
158 netif_stop_queue(dev);
159 lp->rx_new = lp->tx_new = 0;
160 lp->rx_old = lp->tx_old = 0;
161
162 ib->mode = 0;
163
164 /* Copy the ethernet address to the lance init block
165 * Note that on the sparc you need to swap the ethernet address.
166 */
Joe Perches747e2522011-06-22 20:38:54 +0000167 ib->phys_addr[0] = dev->dev_addr[1];
168 ib->phys_addr[1] = dev->dev_addr[0];
169 ib->phys_addr[2] = dev->dev_addr[3];
170 ib->phys_addr[3] = dev->dev_addr[2];
171 ib->phys_addr[4] = dev->dev_addr[5];
172 ib->phys_addr[5] = dev->dev_addr[4];
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 /* Setup the Tx ring entries */
Joe Perches747e2522011-06-22 20:38:54 +0000175 netdev_dbg(dev, "TX rings:\n");
176 for (i = 0; i <= 1 << lp->lance_log_tx_bufs; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
Joe Perches747e2522011-06-22 20:38:54 +0000178 ib->btx_ring[i].tmd0 = leptr;
179 ib->btx_ring[i].tmd1_hadr = leptr >> 16;
180 ib->btx_ring[i].tmd1_bits = 0;
181 ib->btx_ring[i].length = 0xf000; /* The ones required by tmd2 */
182 ib->btx_ring[i].misc = 0;
183 if (i < 3)
184 netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 }
186
187 /* Setup the Rx ring entries */
Joe Perches747e2522011-06-22 20:38:54 +0000188 netdev_dbg(dev, "RX rings:\n");
189 for (i = 0; i < 1 << lp->lance_log_rx_bufs; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
191
Joe Perches747e2522011-06-22 20:38:54 +0000192 ib->brx_ring[i].rmd0 = leptr;
193 ib->brx_ring[i].rmd1_hadr = leptr >> 16;
194 ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
195 ib->brx_ring[i].length = -RX_BUFF_SIZE | 0xf000;
196 ib->brx_ring[i].mblength = 0;
197 if (i < 3)
198 netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 }
200
201 /* Setup the initialization block */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400202
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 /* Setup rx descriptor pointer */
204 leptr = LANCE_ADDR(&aib->brx_ring);
205 ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
206 ib->rx_ptr = leptr;
Joe Perches747e2522011-06-22 20:38:54 +0000207 netdev_dbg(dev, "RX ptr: %08x\n", leptr);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 /* Setup tx descriptor pointer */
210 leptr = LANCE_ADDR(&aib->btx_ring);
211 ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
212 ib->tx_ptr = leptr;
Joe Perches747e2522011-06-22 20:38:54 +0000213 netdev_dbg(dev, "TX ptr: %08x\n", leptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
215 /* Clear the multicast filter */
Joe Perches747e2522011-06-22 20:38:54 +0000216 ib->filter[0] = 0;
217 ib->filter[1] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218}
219
Joe Perches747e2522011-06-22 20:38:54 +0000220static int init_restart_lance(struct lance_private *lp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221{
222 volatile struct lance_regs *ll = lp->ll;
223 int i;
224
225 ll->rap = LE_CSR0;
226 ll->rdp = LE_C0_INIT;
227
228 /* Wait for the lance to complete initialization */
229 for (i = 0; (i < 100) && !(ll->rdp & (LE_C0_ERR | LE_C0_IDON)); i++)
230 barrier();
231 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
Joe Perches747e2522011-06-22 20:38:54 +0000232 pr_err("unopened after %d ticks, csr0=%04x\n", i, ll->rdp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 return -EIO;
234 }
235
236 /* Clear IDON by writing a "1", enable interrupts and start lance */
237 ll->rdp = LE_C0_IDON;
238 ll->rdp = LE_C0_INEA | LE_C0_STRT;
239
240 return 0;
241}
242
Joe Perches747e2522011-06-22 20:38:54 +0000243static int lance_rx(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244{
245 struct lance_private *lp = netdev_priv(dev);
246 volatile struct lance_init_block *ib = lp->init_block;
247 volatile struct lance_regs *ll = lp->ll;
248 volatile struct lance_rx_desc *rd;
249 unsigned char bits;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251#ifdef TEST_HITS
252 int i;
Joe Perches747e2522011-06-22 20:38:54 +0000253 char buf[RX_RING_SIZE + 1];
254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 for (i = 0; i < RX_RING_SIZE; i++) {
Joe Perches747e2522011-06-22 20:38:54 +0000256 char r1_own = ib->brx_ring[i].rmd1_bits & LE_R1_OWN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 if (i == lp->rx_new)
Joe Perches747e2522011-06-22 20:38:54 +0000258 buf[i] = r1_own ? '_' : 'X';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 else
Joe Perches747e2522011-06-22 20:38:54 +0000260 buf[i] = r1_own ? '.' : '1';
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 }
Joe Perches747e2522011-06-22 20:38:54 +0000262 buf[RX_RING_SIZE] = 0;
263
264 pr_debug("RxRing TestHits: [%s]\n", buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265#endif
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400266
Joe Perches747e2522011-06-22 20:38:54 +0000267 ll->rdp = LE_C0_RINT | LE_C0_INEA;
268 for (rd = &ib->brx_ring[lp->rx_new];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 !((bits = rd->rmd1_bits) & LE_R1_OWN);
Joe Perches747e2522011-06-22 20:38:54 +0000270 rd = &ib->brx_ring[lp->rx_new]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
272 /* We got an incomplete frame? */
273 if ((bits & LE_R1_POK) != LE_R1_POK) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700274 dev->stats.rx_over_errors++;
275 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 continue;
277 } else if (bits & LE_R1_ERR) {
278 /* Count only the end frame as a rx error,
279 * not the beginning
280 */
Joe Perches747e2522011-06-22 20:38:54 +0000281 if (bits & LE_R1_BUF)
282 dev->stats.rx_fifo_errors++;
283 if (bits & LE_R1_CRC)
284 dev->stats.rx_crc_errors++;
285 if (bits & LE_R1_OFL)
286 dev->stats.rx_over_errors++;
287 if (bits & LE_R1_FRA)
288 dev->stats.rx_frame_errors++;
289 if (bits & LE_R1_EOP)
290 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 } else {
Al Viro79ea13c2008-01-24 02:06:46 -0800292 int len = (rd->mblength & 0xfff) - 4;
Joe Perches747e2522011-06-22 20:38:54 +0000293 struct sk_buff *skb = dev_alloc_skb(len + 2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Al Viro79ea13c2008-01-24 02:06:46 -0800295 if (!skb) {
Joe Perches747e2522011-06-22 20:38:54 +0000296 netdev_warn(dev, "Memory squeeze, deferring packet\n");
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700297 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 rd->mblength = 0;
299 rd->rmd1_bits = LE_R1_OWN;
300 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
301 return 0;
302 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400303
Joe Perches747e2522011-06-22 20:38:54 +0000304 skb_reserve(skb, 2); /* 16 byte align */
305 skb_put(skb, len); /* make room */
David S. Miller8c7b7fa2007-07-10 22:08:12 -0700306 skb_copy_to_linear_data(skb,
Joe Perches747e2522011-06-22 20:38:54 +0000307 (unsigned char *)&ib->rx_buf[lp->rx_new][0],
308 len);
309 skb->protocol = eth_type_trans(skb, dev);
310 netif_rx(skb);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700311 dev->stats.rx_packets++;
312 dev->stats.rx_bytes += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 }
314
315 /* Return the packet to the pool */
316 rd->mblength = 0;
317 rd->rmd1_bits = LE_R1_OWN;
318 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
319 }
320 return 0;
321}
322
Joe Perches747e2522011-06-22 20:38:54 +0000323static int lance_tx(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324{
325 struct lance_private *lp = netdev_priv(dev);
326 volatile struct lance_init_block *ib = lp->init_block;
327 volatile struct lance_regs *ll = lp->ll;
328 volatile struct lance_tx_desc *td;
329 int i, j;
330 int status;
331
332 /* csr0 is 2f3 */
333 ll->rdp = LE_C0_TINT | LE_C0_INEA;
334 /* csr0 is 73 */
335
336 j = lp->tx_old;
337 for (i = j; i != lp->tx_new; i = j) {
Joe Perches747e2522011-06-22 20:38:54 +0000338 td = &ib->btx_ring[i];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 /* If we hit a packet not owned by us, stop */
341 if (td->tmd1_bits & LE_T1_OWN)
342 break;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400343
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 if (td->tmd1_bits & LE_T1_ERR) {
345 status = td->misc;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400346
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700347 dev->stats.tx_errors++;
Joe Perches747e2522011-06-22 20:38:54 +0000348 if (status & LE_T3_RTY)
349 dev->stats.tx_aborted_errors++;
350 if (status & LE_T3_LCOL)
351 dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
353 if (status & LE_T3_CLOS) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700354 dev->stats.tx_carrier_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 if (lp->auto_select) {
356 lp->tpe = 1 - lp->tpe;
Joe Perches747e2522011-06-22 20:38:54 +0000357 netdev_err(dev, "Carrier Lost, trying %s\n",
358 lp->tpe ? "TPE" : "AUI");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 /* Stop the lance */
360 ll->rap = LE_CSR0;
361 ll->rdp = LE_C0_STOP;
Joe Perches747e2522011-06-22 20:38:54 +0000362 lance_init_ring(dev);
363 load_csrs(lp);
364 init_restart_lance(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 return 0;
366 }
367 }
368
Joe Perches747e2522011-06-22 20:38:54 +0000369 /* buffer errors and underflows turn off
370 * the transmitter, so restart the adapter
371 */
372 if (status & (LE_T3_BUF | LE_T3_UFL)) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700373 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
Joe Perches747e2522011-06-22 20:38:54 +0000375 netdev_err(dev, "Tx: ERR_BUF|ERR_UFL, restarting\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 /* Stop the lance */
377 ll->rap = LE_CSR0;
378 ll->rdp = LE_C0_STOP;
Joe Perches747e2522011-06-22 20:38:54 +0000379 lance_init_ring(dev);
380 load_csrs(lp);
381 init_restart_lance(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 return 0;
383 }
384 } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
Joe Perches747e2522011-06-22 20:38:54 +0000385 /* So we don't count the packet more than once. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 td->tmd1_bits &= ~(LE_T1_POK);
387
388 /* One collision before packet was sent. */
389 if (td->tmd1_bits & LE_T1_EONE)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700390 dev->stats.collisions++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392 /* More than one collision, be optimistic. */
393 if (td->tmd1_bits & LE_T1_EMORE)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700394 dev->stats.collisions += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700396 dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 j = (j + 1) & lp->tx_ring_mod_mask;
400 }
401 lp->tx_old = j;
402 ll->rdp = LE_C0_TINT | LE_C0_INEA;
403 return 0;
404}
405
Joe Perches747e2522011-06-22 20:38:54 +0000406static int lance_tx_buffs_avail(struct lance_private *lp)
407{
408 if (lp->tx_old <= lp->tx_new)
409 return lp->tx_old + lp->tx_ring_mod_mask - lp->tx_new;
410 return lp->tx_old - lp->tx_new - 1;
411}
412
413static irqreturn_t lance_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414{
Joe Perches43d620c2011-06-16 19:08:06 +0000415 struct net_device *dev = dev_id;
416 struct lance_private *lp = netdev_priv(dev);
417 volatile struct lance_regs *ll = lp->ll;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 int csr0;
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 ll->rap = LE_CSR0; /* LANCE Controller Status */
421 csr0 = ll->rdp;
422
423 if (!(csr0 & LE_C0_INTR)) /* Check if any interrupt has */
424 return IRQ_NONE; /* been generated by the Lance. */
425
426 /* Acknowledge all the interrupt sources ASAP */
Joe Perches747e2522011-06-22 20:38:54 +0000427 ll->rdp = csr0 & ~(LE_C0_INEA | LE_C0_TDMD | LE_C0_STOP | LE_C0_STRT |
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 LE_C0_INIT);
429
Joe Perches747e2522011-06-22 20:38:54 +0000430 if (csr0 & LE_C0_ERR) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 /* Clear the error condition */
Joe Perches747e2522011-06-22 20:38:54 +0000432 ll->rdp = LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | LE_C0_INEA;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400434
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 if (csr0 & LE_C0_RINT)
Joe Perches747e2522011-06-22 20:38:54 +0000436 lance_rx(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
438 if (csr0 & LE_C0_TINT)
Joe Perches747e2522011-06-22 20:38:54 +0000439 lance_tx(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
441 /* Log misc errors. */
442 if (csr0 & LE_C0_BABL)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700443 dev->stats.tx_errors++; /* Tx babble. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 if (csr0 & LE_C0_MISS)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700445 dev->stats.rx_errors++; /* Missed a Rx frame. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 if (csr0 & LE_C0_MERR) {
Joe Perches747e2522011-06-22 20:38:54 +0000447 netdev_err(dev, "Bus master arbitration failure, status %04x\n",
448 csr0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 /* Restart the chip. */
450 ll->rdp = LE_C0_STRT;
451 }
452
Joe Perches747e2522011-06-22 20:38:54 +0000453 if (netif_queue_stopped(dev) && lance_tx_buffs_avail(lp) > 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 netif_wake_queue(dev);
455
456 ll->rap = LE_CSR0;
Joe Perches747e2522011-06-22 20:38:54 +0000457 ll->rdp = (LE_C0_BABL | LE_C0_CERR | LE_C0_MISS | LE_C0_MERR |
458 LE_C0_IDON | LE_C0_INEA);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 return IRQ_HANDLED;
460}
461
Joe Perches747e2522011-06-22 20:38:54 +0000462static int lance_open(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463{
464 struct lance_private *lp = netdev_priv(dev);
465 volatile struct lance_regs *ll = lp->ll;
466 int ret;
467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 /* Stop the Lance */
469 ll->rap = LE_CSR0;
470 ll->rdp = LE_C0_STOP;
471
472 /* Install the Interrupt handler */
Thomas Gleixner1fb9df52006-07-01 19:29:39 -0700473 ret = request_irq(IRQ_AMIGA_PORTS, lance_interrupt, IRQF_SHARED,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 dev->name, dev);
Joe Perches747e2522011-06-22 20:38:54 +0000475 if (ret)
476 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Joe Perches747e2522011-06-22 20:38:54 +0000478 load_csrs(lp);
479 lance_init_ring(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
481 netif_start_queue(dev);
482
Joe Perches747e2522011-06-22 20:38:54 +0000483 return init_restart_lance(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484}
485
Joe Perches747e2522011-06-22 20:38:54 +0000486static int lance_close(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487{
488 struct lance_private *lp = netdev_priv(dev);
489 volatile struct lance_regs *ll = lp->ll;
490
491 netif_stop_queue(dev);
492 del_timer_sync(&lp->multicast_timer);
493
494 /* Stop the card */
495 ll->rap = LE_CSR0;
496 ll->rdp = LE_C0_STOP;
497
498 free_irq(IRQ_AMIGA_PORTS, dev);
499 return 0;
500}
501
Joe Perches747e2522011-06-22 20:38:54 +0000502static inline int lance_reset(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503{
504 struct lance_private *lp = netdev_priv(dev);
505 volatile struct lance_regs *ll = lp->ll;
506 int status;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400507
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 /* Stop the lance */
509 ll->rap = LE_CSR0;
510 ll->rdp = LE_C0_STOP;
511
Joe Perches747e2522011-06-22 20:38:54 +0000512 load_csrs(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Joe Perches747e2522011-06-22 20:38:54 +0000514 lance_init_ring(dev);
Eric Dumazet1ae5dc32010-05-10 05:01:31 -0700515 dev->trans_start = jiffies; /* prevent tx timeout */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 netif_start_queue(dev);
517
Joe Perches747e2522011-06-22 20:38:54 +0000518 status = init_restart_lance(lp);
519 netdev_dbg(dev, "Lance restart=%d\n", status);
520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 return status;
522}
523
524static void lance_tx_timeout(struct net_device *dev)
525{
526 struct lance_private *lp = netdev_priv(dev);
527 volatile struct lance_regs *ll = lp->ll;
528
Joe Perches747e2522011-06-22 20:38:54 +0000529 netdev_err(dev, "transmit timed out, status %04x, reset\n", ll->rdp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 lance_reset(dev);
531 netif_wake_queue(dev);
532}
533
Joe Perches747e2522011-06-22 20:38:54 +0000534static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
535 struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536{
537 struct lance_private *lp = netdev_priv(dev);
538 volatile struct lance_regs *ll = lp->ll;
539 volatile struct lance_init_block *ib = lp->init_block;
Dave Jonescedc1db2009-03-18 18:17:48 -0700540 int entry, skblen;
Patrick McHardyec634fe2009-07-05 19:23:38 -0700541 int status = NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 unsigned long flags;
543
Dave Jonescedc1db2009-03-18 18:17:48 -0700544 if (skb_padto(skb, ETH_ZLEN))
Patrick McHardyec634fe2009-07-05 19:23:38 -0700545 return NETDEV_TX_OK;
Dave Jonescedc1db2009-03-18 18:17:48 -0700546 skblen = max_t(unsigned, skb->len, ETH_ZLEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547
548 local_irq_save(flags);
549
Joe Perches747e2522011-06-22 20:38:54 +0000550 if (!lance_tx_buffs_avail(lp)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 local_irq_restore(flags);
Patrick McHardy5b548142009-06-12 06:22:29 +0000552 return NETDEV_TX_LOCKED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 }
554
Joe Perches747e2522011-06-22 20:38:54 +0000555#ifdef DEBUG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 /* dump the packet */
Joe Perchesad361c92009-07-06 13:05:40 -0700557 print_hex_dump(KERN_DEBUG, "skb->data: ", DUMP_PREFIX_NONE,
558 16, 1, skb->data, 64, true);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559#endif
560 entry = lp->tx_new & lp->tx_ring_mod_mask;
Joe Perches747e2522011-06-22 20:38:54 +0000561 ib->btx_ring[entry].length = (-skblen) | 0xf000;
562 ib->btx_ring[entry].misc = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400563
Joe Perches747e2522011-06-22 20:38:54 +0000564 skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 /* Now, give the packet to the lance */
Joe Perches747e2522011-06-22 20:38:54 +0000567 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700569 dev->stats.tx_bytes += skblen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Joe Perches747e2522011-06-22 20:38:54 +0000571 if (lance_tx_buffs_avail(lp) <= 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 netif_stop_queue(dev);
573
574 /* Kick the lance: transmit now */
575 ll->rdp = LE_C0_INEA | LE_C0_TDMD;
Joe Perches747e2522011-06-22 20:38:54 +0000576 dev_kfree_skb(skb);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400577
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 local_irq_restore(flags);
579
580 return status;
581}
582
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583/* taken from the depca driver */
Joe Perches747e2522011-06-22 20:38:54 +0000584static void lance_load_multicast(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585{
586 struct lance_private *lp = netdev_priv(dev);
587 volatile struct lance_init_block *ib = lp->init_block;
588 volatile u16 *mcast_table = (u16 *)&ib->filter;
Jiri Pirko22bedad32010-04-01 21:22:57 +0000589 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 u32 crc;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400591
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 /* set all multicast bits */
Joe Perches747e2522011-06-22 20:38:54 +0000593 if (dev->flags & IFF_ALLMULTI) {
594 ib->filter[0] = 0xffffffff;
595 ib->filter[1] = 0xffffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 return;
597 }
598 /* clear the multicast filter */
Joe Perches747e2522011-06-22 20:38:54 +0000599 ib->filter[0] = 0;
600 ib->filter[1] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
602 /* Add addresses */
Jiri Pirko22bedad32010-04-01 21:22:57 +0000603 netdev_for_each_mc_addr(ha, dev) {
Tobias Klauser498d8e22011-07-07 22:06:26 +0000604 crc = ether_crc_le(6, ha->addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 crc = crc >> 26;
Joe Perches747e2522011-06-22 20:38:54 +0000606 mcast_table[crc >> 4] |= 1 << (crc & 0xf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608}
609
Joe Perches747e2522011-06-22 20:38:54 +0000610static void lance_set_multicast(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611{
612 struct lance_private *lp = netdev_priv(dev);
613 volatile struct lance_init_block *ib = lp->init_block;
614 volatile struct lance_regs *ll = lp->ll;
615
616 if (!netif_running(dev))
617 return;
618
619 if (lp->tx_old != lp->tx_new) {
620 mod_timer(&lp->multicast_timer, jiffies + 4);
621 netif_wake_queue(dev);
622 return;
623 }
624
625 netif_stop_queue(dev);
626
627 ll->rap = LE_CSR0;
628 ll->rdp = LE_C0_STOP;
Joe Perches747e2522011-06-22 20:38:54 +0000629 lance_init_ring(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630
631 if (dev->flags & IFF_PROMISC) {
632 ib->mode |= LE_MO_PROM;
633 } else {
634 ib->mode &= ~LE_MO_PROM;
Joe Perches747e2522011-06-22 20:38:54 +0000635 lance_load_multicast(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 }
Joe Perches747e2522011-06-22 20:38:54 +0000637 load_csrs(lp);
638 init_restart_lance(lp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 netif_wake_queue(dev);
640}
641
642static int __devinit a2065_init_one(struct zorro_dev *z,
643 const struct zorro_device_id *ent);
644static void __devexit a2065_remove_one(struct zorro_dev *z);
645
646
647static struct zorro_device_id a2065_zorro_tbl[] __devinitdata = {
648 { ZORRO_PROD_CBM_A2065_1 },
649 { ZORRO_PROD_CBM_A2065_2 },
650 { ZORRO_PROD_AMERISTAR_A2065 },
651 { 0 }
652};
Geert Uytterhoevenbf54a2b2008-11-18 21:13:53 +0100653MODULE_DEVICE_TABLE(zorro, a2065_zorro_tbl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654
655static struct zorro_driver a2065_driver = {
656 .name = "a2065",
657 .id_table = a2065_zorro_tbl,
658 .probe = a2065_init_one,
659 .remove = __devexit_p(a2065_remove_one),
660};
661
Alexander Beregalov444f1a92009-04-14 18:30:21 +0000662static const struct net_device_ops lance_netdev_ops = {
663 .ndo_open = lance_open,
664 .ndo_stop = lance_close,
665 .ndo_start_xmit = lance_start_xmit,
666 .ndo_tx_timeout = lance_tx_timeout,
667 .ndo_set_multicast_list = lance_set_multicast,
668 .ndo_validate_addr = eth_validate_addr,
669 .ndo_change_mtu = eth_change_mtu,
670 .ndo_set_mac_address = eth_mac_addr,
671};
672
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673static int __devinit a2065_init_one(struct zorro_dev *z,
674 const struct zorro_device_id *ent)
675{
676 struct net_device *dev;
677 struct lance_private *priv;
Joe Perches747e2522011-06-22 20:38:54 +0000678 unsigned long board = z->resource.start;
679 unsigned long base_addr = board + A2065_LANCE;
680 unsigned long mem_start = board + A2065_RAM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 struct resource *r1, *r2;
682 int err;
683
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 r1 = request_mem_region(base_addr, sizeof(struct lance_regs),
685 "Am7990");
686 if (!r1)
687 return -EBUSY;
688 r2 = request_mem_region(mem_start, A2065_RAM_SIZE, "RAM");
689 if (!r2) {
Julia Lawalle6937ee2011-03-22 07:15:23 +0000690 release_mem_region(base_addr, sizeof(struct lance_regs));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 return -EBUSY;
692 }
693
694 dev = alloc_etherdev(sizeof(struct lance_private));
695 if (dev == NULL) {
Julia Lawalle6937ee2011-03-22 07:15:23 +0000696 release_mem_region(base_addr, sizeof(struct lance_regs));
697 release_mem_region(mem_start, A2065_RAM_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 return -ENOMEM;
699 }
700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 priv = netdev_priv(dev);
702
703 r1->name = dev->name;
704 r2->name = dev->name;
705
706 dev->dev_addr[0] = 0x00;
707 if (z->id != ZORRO_PROD_AMERISTAR_A2065) { /* Commodore */
708 dev->dev_addr[1] = 0x80;
709 dev->dev_addr[2] = 0x10;
710 } else { /* Ameristar */
711 dev->dev_addr[1] = 0x00;
712 dev->dev_addr[2] = 0x9f;
713 }
Joe Perches747e2522011-06-22 20:38:54 +0000714 dev->dev_addr[3] = (z->rom.er_SerialNumber >> 16) & 0xff;
715 dev->dev_addr[4] = (z->rom.er_SerialNumber >> 8) & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 dev->dev_addr[5] = z->rom.er_SerialNumber & 0xff;
717 dev->base_addr = ZTWO_VADDR(base_addr);
718 dev->mem_start = ZTWO_VADDR(mem_start);
Joe Perches747e2522011-06-22 20:38:54 +0000719 dev->mem_end = dev->mem_start + A2065_RAM_SIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720
721 priv->ll = (volatile struct lance_regs *)dev->base_addr;
722 priv->init_block = (struct lance_init_block *)dev->mem_start;
723 priv->lance_init_block = (struct lance_init_block *)A2065_RAM;
724 priv->auto_select = 0;
725 priv->busmaster_regval = LE_C3_BSWP;
726
727 priv->lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
728 priv->lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
729 priv->rx_ring_mod_mask = RX_RING_MOD_MASK;
730 priv->tx_ring_mod_mask = TX_RING_MOD_MASK;
731
Alexander Beregalov444f1a92009-04-14 18:30:21 +0000732 dev->netdev_ops = &lance_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 dev->watchdog_timeo = 5*HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 dev->dma = 0;
735
736 init_timer(&priv->multicast_timer);
737 priv->multicast_timer.data = (unsigned long) dev;
738 priv->multicast_timer.function =
Joe Perches747e2522011-06-22 20:38:54 +0000739 (void (*)(unsigned long))lance_set_multicast;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740
741 err = register_netdev(dev);
742 if (err) {
Julia Lawalle6937ee2011-03-22 07:15:23 +0000743 release_mem_region(base_addr, sizeof(struct lance_regs));
744 release_mem_region(mem_start, A2065_RAM_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 free_netdev(dev);
746 return err;
747 }
748 zorro_set_drvdata(z, dev);
749
Joe Perches747e2522011-06-22 20:38:54 +0000750 netdev_info(dev, "A2065 at 0x%08lx, Ethernet Address %pM\n",
751 board, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
753 return 0;
754}
755
756
757static void __devexit a2065_remove_one(struct zorro_dev *z)
758{
759 struct net_device *dev = zorro_get_drvdata(z);
760
761 unregister_netdev(dev);
762 release_mem_region(ZTWO_PADDR(dev->base_addr),
763 sizeof(struct lance_regs));
764 release_mem_region(ZTWO_PADDR(dev->mem_start), A2065_RAM_SIZE);
765 free_netdev(dev);
766}
767
768static int __init a2065_init_module(void)
769{
Bjorn Helgaas33d86752006-03-25 03:07:20 -0800770 return zorro_register_driver(&a2065_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771}
772
773static void __exit a2065_cleanup_module(void)
774{
775 zorro_unregister_driver(&a2065_driver);
776}
777
778module_init(a2065_init_module);
779module_exit(a2065_cleanup_module);
780
781MODULE_LICENSE("GPL");