blob: 4f7748478984750fa4a9872341f3db5f36d802a8 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Sealevel Systems 4021 driver.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * (c) Copyright 1999, 2001 Alan Cox
10 * (c) Copyright 2001 Red Hat Inc.
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020011 * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012 *
13 */
14
Joe Perches23efcb72011-06-26 19:01:35 +000015#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/mm.h>
20#include <linux/net.h>
21#include <linux/skbuff.h>
22#include <linux/netdevice.h>
23#include <linux/if_arp.h>
24#include <linux/delay.h>
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020025#include <linux/hdlc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/ioport.h>
27#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090028#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <net/arp.h>
30
Al Viro82729972005-12-06 05:53:04 -050031#include <asm/irq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <asm/io.h>
33#include <asm/dma.h>
34#include <asm/byteorder.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "z85230.h"
36
37
38struct slvl_device
39{
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 struct z8530_channel *chan;
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 int channel;
42};
43
44
45struct slvl_board
46{
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020047 struct slvl_device dev[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 struct z8530_dev board;
49 int iobase;
50};
51
52/*
53 * Network driver support routines
54 */
55
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020056static inline struct slvl_device* dev_to_chan(struct net_device *dev)
57{
58 return (struct slvl_device *)dev_to_hdlc(dev)->priv;
59}
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061/*
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020062 * Frame receive. Simple for our card as we do HDLC and there
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 * is no funny garbage involved
64 */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020065
Linus Torvalds1da177e2005-04-16 15:20:36 -070066static void sealevel_input(struct z8530_channel *c, struct sk_buff *skb)
67{
68 /* Drop the CRC - it's not a good idea to try and negotiate it ;) */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020069 skb_trim(skb, skb->len - 2);
70 skb->protocol = hdlc_type_trans(skb, c->netdevice);
Arnaldo Carvalho de Melo98e399f2007-03-19 15:33:04 -070071 skb_reset_mac_header(skb);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020072 skb->dev = c->netdevice;
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 netif_rx(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074}
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020075
Linus Torvalds1da177e2005-04-16 15:20:36 -070076/*
77 * We've been placed in the UP state
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020078 */
79
Linus Torvalds1da177e2005-04-16 15:20:36 -070080static int sealevel_open(struct net_device *d)
81{
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020082 struct slvl_device *slvl = dev_to_chan(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 int err = -1;
84 int unit = slvl->channel;
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020085
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 /*
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020087 * Link layer up.
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 */
89
Rudy Matela614c12a2009-12-02 01:26:01 -080090 switch (unit) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 case 0:
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020092 err = z8530_sync_dma_open(d, slvl->chan);
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 break;
94 case 1:
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020095 err = z8530_sync_open(d, slvl->chan);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 break;
97 }
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +020098
99 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 return err;
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200101
102 err = hdlc_open(d);
103 if (err) {
104 switch (unit) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 case 0:
106 z8530_sync_dma_close(d, slvl->chan);
107 break;
108 case 1:
109 z8530_sync_close(d, slvl->chan);
110 break;
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200111 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 return err;
113 }
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200114
115 slvl->chan->rx_function = sealevel_input;
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 /*
118 * Go go go
119 */
120 netif_start_queue(d);
121 return 0;
122}
123
124static int sealevel_close(struct net_device *d)
125{
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200126 struct slvl_device *slvl = dev_to_chan(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 int unit = slvl->channel;
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 /*
130 * Discard new frames
131 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200133 slvl->chan->rx_function = z8530_null_rx;
134
135 hdlc_close(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 netif_stop_queue(d);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200137
Rudy Matela614c12a2009-12-02 01:26:01 -0800138 switch (unit) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 case 0:
140 z8530_sync_dma_close(d, slvl->chan);
141 break;
142 case 1:
143 z8530_sync_close(d, slvl->chan);
144 break;
145 }
146 return 0;
147}
148
149static int sealevel_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
150{
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200151 /* struct slvl_device *slvl=dev_to_chan(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 z8530_ioctl(d,&slvl->sync.chanA,ifr,cmd) */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200153 return hdlc_ioctl(d, ifr, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154}
155
156/*
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200157 * Passed network frames, fire them downwind.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200159
Stephen Hemmingerd71a6742009-08-31 19:50:47 +0000160static netdev_tx_t sealevel_queue_xmit(struct sk_buff *skb,
161 struct net_device *d)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162{
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200163 return z8530_queue_xmit(dev_to_chan(d)->chan, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164}
165
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200166static int sealevel_attach(struct net_device *dev, unsigned short encoding,
167 unsigned short parity)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168{
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200169 if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
170 return 0;
171 return -EINVAL;
172}
173
Krzysztof Hałasa991990a2009-01-08 22:52:11 +0100174static const struct net_device_ops sealevel_ops = {
175 .ndo_open = sealevel_open,
176 .ndo_stop = sealevel_close,
177 .ndo_change_mtu = hdlc_change_mtu,
178 .ndo_start_xmit = hdlc_start_xmit,
179 .ndo_do_ioctl = sealevel_ioctl,
180};
181
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200182static int slvl_setup(struct slvl_device *sv, int iobase, int irq)
183{
184 struct net_device *dev = alloc_hdlcdev(sv);
185 if (!dev)
186 return -1;
187
188 dev_to_hdlc(dev)->attach = sealevel_attach;
189 dev_to_hdlc(dev)->xmit = sealevel_queue_xmit;
Krzysztof Hałasa991990a2009-01-08 22:52:11 +0100190 dev->netdev_ops = &sealevel_ops;
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200191 dev->base_addr = iobase;
192 dev->irq = irq;
193
194 if (register_hdlc_device(dev)) {
Joe Perches23efcb72011-06-26 19:01:35 +0000195 pr_err("unable to register HDLC device\n");
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200196 free_netdev(dev);
197 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 }
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200199
200 sv->chan->netdevice = dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 return 0;
202}
203
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205/*
206 * Allocate and setup Sealevel board.
207 */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200208
209static __init struct slvl_board *slvl_init(int iobase, int irq,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 int txdma, int rxdma, int slow)
211{
212 struct z8530_dev *dev;
213 struct slvl_board *b;
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 /*
216 * Get the needed I/O space
217 */
218
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200219 if (!request_region(iobase, 8, "Sealevel 4021")) {
Joe Perches23efcb72011-06-26 19:01:35 +0000220 pr_warn("I/O 0x%X already in use\n", iobase);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 return NULL;
222 }
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200223
Yoann Padioleaudd00cc42007-07-19 01:49:03 -0700224 b = kzalloc(sizeof(struct slvl_board), GFP_KERNEL);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200225 if (!b)
226 goto err_kzalloc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200228 b->dev[0].chan = &b->board.chanA;
229 b->dev[0].channel = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200231 b->dev[1].chan = &b->board.chanB;
232 b->dev[1].channel = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
234 dev = &b->board;
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 /*
237 * Stuff in the I/O addressing
238 */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 dev->active = 0;
241
242 b->iobase = iobase;
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 /*
245 * Select 8530 delays for the old board
246 */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200247
248 if (slow)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 iobase |= Z8530_PORT_SLEEP;
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200250
251 dev->chanA.ctrlio = iobase + 1;
252 dev->chanA.dataio = iobase;
253 dev->chanB.ctrlio = iobase + 3;
254 dev->chanB.dataio = iobase + 2;
255
256 dev->chanA.irqs = &z8530_nop;
257 dev->chanB.irqs = &z8530_nop;
258
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 /*
260 * Assert DTR enable DMA
261 */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200262
263 outb(3 | (1 << 7), b->iobase + 4);
264
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
266 /* We want a fast IRQ for this device. Actually we'd like an even faster
267 IRQ ;) - This is one driver RtLinux is made for */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Joe Perchesa0607fd2009-11-18 23:29:17 -0800269 if (request_irq(irq, z8530_interrupt, IRQF_DISABLED,
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200270 "SeaLevel", dev) < 0) {
Joe Perches23efcb72011-06-26 19:01:35 +0000271 pr_warn("IRQ %d already in use\n", irq);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200272 goto err_request_irq;
273 }
274
275 dev->irq = irq;
276 dev->chanA.private = &b->dev[0];
277 dev->chanB.private = &b->dev[1];
278 dev->chanA.dev = dev;
279 dev->chanB.dev = dev;
280
281 dev->chanA.txdma = 3;
282 dev->chanA.rxdma = 1;
283 if (request_dma(dev->chanA.txdma, "SeaLevel (TX)"))
284 goto err_dma_tx;
285
286 if (request_dma(dev->chanA.rxdma, "SeaLevel (RX)"))
287 goto err_dma_rx;
288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 disable_irq(irq);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200290
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 /*
292 * Begin normal initialise
293 */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200294
295 if (z8530_init(dev) != 0) {
Joe Perches23efcb72011-06-26 19:01:35 +0000296 pr_err("Z8530 series device not found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 enable_irq(irq);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200298 goto free_hw;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 }
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200300 if (dev->type == Z85C30) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
302 z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200303 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
305 z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230);
306 }
307
308 /*
309 * Now we can take the IRQ
310 */
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 enable_irq(irq);
313
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200314 if (slvl_setup(&b->dev[0], iobase, irq))
315 goto free_hw;
316 if (slvl_setup(&b->dev[1], iobase, irq))
317 goto free_netdev0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
319 z8530_describe(dev, "I/O", iobase);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200320 dev->active = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 return b;
322
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200323free_netdev0:
324 unregister_hdlc_device(b->dev[0].chan->netdevice);
325 free_netdev(b->dev[0].chan->netdevice);
326free_hw:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 free_dma(dev->chanA.rxdma);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200328err_dma_rx:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 free_dma(dev->chanA.txdma);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200330err_dma_tx:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 free_irq(irq, dev);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200332err_request_irq:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 kfree(b);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200334err_kzalloc:
335 release_region(iobase, 8);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 return NULL;
337}
338
339static void __exit slvl_shutdown(struct slvl_board *b)
340{
341 int u;
342
343 z8530_shutdown(&b->board);
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200344
Rudy Matela614c12a2009-12-02 01:26:01 -0800345 for (u = 0; u < 2; u++) {
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200346 struct net_device *d = b->dev[u].chan->netdevice;
347 unregister_hdlc_device(d);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 free_netdev(d);
349 }
Krzysztof Hałasa52e8a6a2008-07-02 17:47:52 +0200350
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 free_irq(b->board.irq, &b->board);
352 free_dma(b->board.chanA.rxdma);
353 free_dma(b->board.chanA.txdma);
354 /* DMA off on the card, drop DTR */
355 outb(0, b->iobase);
356 release_region(b->iobase, 8);
357 kfree(b);
358}
359
360
361static int io=0x238;
362static int txdma=1;
363static int rxdma=3;
364static int irq=5;
Rusty Russelleb939922011-12-19 14:08:01 +0000365static bool slow=false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
367module_param(io, int, 0);
368MODULE_PARM_DESC(io, "The I/O base of the Sealevel card");
369module_param(txdma, int, 0);
370MODULE_PARM_DESC(txdma, "Transmit DMA channel");
371module_param(rxdma, int, 0);
372MODULE_PARM_DESC(rxdma, "Receive DMA channel");
373module_param(irq, int, 0);
374MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card");
375module_param(slow, bool, 0);
376MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012");
377
378MODULE_AUTHOR("Alan Cox");
379MODULE_LICENSE("GPL");
380MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021");
381
382static struct slvl_board *slvl_unit;
383
384static int __init slvl_init_module(void)
385{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 slvl_unit = slvl_init(io, irq, txdma, rxdma, slow);
387
388 return slvl_unit ? 0 : -ENODEV;
389}
390
391static void __exit slvl_cleanup_module(void)
392{
Rudy Matela614c12a2009-12-02 01:26:01 -0800393 if (slvl_unit)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 slvl_shutdown(slvl_unit);
395}
396
397module_init(slvl_init_module);
398module_exit(slvl_cleanup_module);