blob: ed999d31f1fa802e4738d466c68ea7e03f263ce0 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sgiseeq.c: Seeq8003 ethernet driver for SGI machines.
3 *
4 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
5 */
Ralf Baechlea4d4d512006-03-08 11:49:31 +00006
7#undef DEBUG
8
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/errno.h>
12#include <linux/init.h>
13#include <linux/types.h>
14#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#include <linux/string.h>
16#include <linux/delay.h>
17#include <linux/netdevice.h>
Ralf Baechledf9f5402007-05-11 15:48:58 +010018#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/etherdevice.h>
20#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <asm/sgi/hpc3.h>
23#include <asm/sgi/ip22.h>
Ralf Baechledf9f5402007-05-11 15:48:58 +010024#include <asm/sgi/seeq.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
26#include "sgiseeq.h"
27
Linus Torvalds1da177e2005-04-16 15:20:36 -070028static char *sgiseeqstr = "SGI Seeq8003";
29
30/*
31 * If you want speed, you do something silly, it always has worked for me. So,
32 * with that in mind, I've decided to make this driver look completely like a
33 * stupid Lance from a driver architecture perspective. Only difference is that
34 * here our "ring buffer" looks and acts like a real Lance one does but is
35 * layed out like how the HPC DMA and the Seeq want it to. You'd be surprised
36 * how a stupid idea like this can pay off in performance, not to mention
37 * making this driver 2,000 times easier to write. ;-)
38 */
39
40/* Tune these if we tend to run out often etc. */
41#define SEEQ_RX_BUFFERS 16
42#define SEEQ_TX_BUFFERS 16
43
44#define PKT_BUF_SZ 1584
45
46#define NEXT_RX(i) (((i) + 1) & (SEEQ_RX_BUFFERS - 1))
47#define NEXT_TX(i) (((i) + 1) & (SEEQ_TX_BUFFERS - 1))
48#define PREV_RX(i) (((i) - 1) & (SEEQ_RX_BUFFERS - 1))
49#define PREV_TX(i) (((i) - 1) & (SEEQ_TX_BUFFERS - 1))
50
51#define TX_BUFFS_AVAIL(sp) ((sp->tx_old <= sp->tx_new) ? \
52 sp->tx_old + (SEEQ_TX_BUFFERS - 1) - sp->tx_new : \
53 sp->tx_old - sp->tx_new - 1)
54
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +010055#define VIRT_TO_DMA(sp, v) ((sp)->srings_dma + \
56 (dma_addr_t)((unsigned long)(v) - \
57 (unsigned long)((sp)->rx_desc)))
58
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +010059/* Copy frames shorter than rx_copybreak, otherwise pass on up in
60 * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
61 */
62static int rx_copybreak = 100;
63
64#define PAD_SIZE (128 - sizeof(struct hpc_dma_desc) - sizeof(void *))
65
Linus Torvalds1da177e2005-04-16 15:20:36 -070066struct sgiseeq_rx_desc {
67 volatile struct hpc_dma_desc rdma;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +010068 u8 padding[PAD_SIZE];
69 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070};
71
72struct sgiseeq_tx_desc {
73 volatile struct hpc_dma_desc tdma;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +010074 u8 padding[PAD_SIZE];
75 struct sk_buff *skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076};
77
78/*
79 * Warning: This structure is layed out in a certain way because HPC dma
80 * descriptors must be 8-byte aligned. So don't touch this without
81 * some care.
82 */
83struct sgiseeq_init_block { /* Note the name ;-) */
84 struct sgiseeq_rx_desc rxvector[SEEQ_RX_BUFFERS];
85 struct sgiseeq_tx_desc txvector[SEEQ_TX_BUFFERS];
86};
87
88struct sgiseeq_private {
89 struct sgiseeq_init_block *srings;
Ralf Baechle99cd1492007-09-04 14:41:01 +010090 dma_addr_t srings_dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 /* Ptrs to the descriptors in uncached space. */
93 struct sgiseeq_rx_desc *rx_desc;
94 struct sgiseeq_tx_desc *tx_desc;
95
96 char *name;
97 struct hpc3_ethregs *hregs;
98 struct sgiseeq_regs *sregs;
99
100 /* Ring entry counters. */
101 unsigned int rx_new, tx_new;
102 unsigned int rx_old, tx_old;
103
104 int is_edlc;
105 unsigned char control;
106 unsigned char mode;
107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 spinlock_t tx_lock;
109};
110
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100111static inline void dma_sync_desc_cpu(struct net_device *dev, void *addr)
112{
113 dma_cache_sync(dev->dev.parent, addr, sizeof(struct sgiseeq_rx_desc),
114 DMA_FROM_DEVICE);
115}
116
117static inline void dma_sync_desc_dev(struct net_device *dev, void *addr)
118{
119 dma_cache_sync(dev->dev.parent, addr, sizeof(struct sgiseeq_rx_desc),
120 DMA_TO_DEVICE);
121}
122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123static inline void hpc3_eth_reset(struct hpc3_ethregs *hregs)
124{
Ralf Baechle302a5c4b2005-10-10 14:50:56 +0100125 hregs->reset = HPC3_ERST_CRESET | HPC3_ERST_CLRIRQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 udelay(20);
Ralf Baechle302a5c4b2005-10-10 14:50:56 +0100127 hregs->reset = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128}
129
130static inline void reset_hpc3_and_seeq(struct hpc3_ethregs *hregs,
131 struct sgiseeq_regs *sregs)
132{
133 hregs->rx_ctrl = hregs->tx_ctrl = 0;
134 hpc3_eth_reset(hregs);
135}
136
137#define RSTAT_GO_BITS (SEEQ_RCMD_IGOOD | SEEQ_RCMD_IEOF | SEEQ_RCMD_ISHORT | \
138 SEEQ_RCMD_IDRIB | SEEQ_RCMD_ICRC)
139
140static inline void seeq_go(struct sgiseeq_private *sp,
141 struct hpc3_ethregs *hregs,
142 struct sgiseeq_regs *sregs)
143{
144 sregs->rstat = sp->mode | RSTAT_GO_BITS;
145 hregs->rx_ctrl = HPC3_ERXCTRL_ACTIVE;
146}
147
148static inline void __sgiseeq_set_mac_address(struct net_device *dev)
149{
150 struct sgiseeq_private *sp = netdev_priv(dev);
151 struct sgiseeq_regs *sregs = sp->sregs;
152 int i;
153
154 sregs->tstat = SEEQ_TCMD_RB0;
155 for (i = 0; i < 6; i++)
156 sregs->rw.eth_addr[i] = dev->dev_addr[i];
157}
158
159static int sgiseeq_set_mac_address(struct net_device *dev, void *addr)
160{
161 struct sgiseeq_private *sp = netdev_priv(dev);
162 struct sockaddr *sa = addr;
163
164 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
165
166 spin_lock_irq(&sp->tx_lock);
167 __sgiseeq_set_mac_address(dev);
168 spin_unlock_irq(&sp->tx_lock);
169
170 return 0;
171}
172
173#define TCNTINFO_INIT (HPCDMA_EOX | HPCDMA_ETXD)
174#define RCNTCFG_INIT (HPCDMA_OWN | HPCDMA_EORP | HPCDMA_XIE)
175#define RCNTINFO_INIT (RCNTCFG_INIT | (PKT_BUF_SZ & HPCDMA_BCNT))
176
177static int seeq_init_ring(struct net_device *dev)
178{
179 struct sgiseeq_private *sp = netdev_priv(dev);
180 int i;
181
182 netif_stop_queue(dev);
183 sp->rx_new = sp->tx_new = 0;
184 sp->rx_old = sp->tx_old = 0;
185
186 __sgiseeq_set_mac_address(dev);
187
188 /* Setup tx ring. */
189 for(i = 0; i < SEEQ_TX_BUFFERS; i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 sp->tx_desc[i].tdma.cntinfo = TCNTINFO_INIT;
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100191 dma_sync_desc_dev(dev, &sp->tx_desc[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 }
193
194 /* And now the rx ring. */
195 for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
Thomas Bogendoerfera24a7892008-01-13 00:08:47 +0100196 if (!sp->rx_desc[i].skb) {
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100197 dma_addr_t dma_addr;
198 struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100200 if (skb == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 return -ENOMEM;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100202 skb_reserve(skb, 2);
203 dma_addr = dma_map_single(dev->dev.parent,
204 skb->data - 2,
205 PKT_BUF_SZ, DMA_FROM_DEVICE);
206 sp->rx_desc[i].skb = skb;
207 sp->rx_desc[i].rdma.pbuf = dma_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 }
209 sp->rx_desc[i].rdma.cntinfo = RCNTINFO_INIT;
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100210 dma_sync_desc_dev(dev, &sp->rx_desc[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 }
212 sp->rx_desc[i - 1].rdma.cntinfo |= HPCDMA_EOR;
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100213 dma_sync_desc_dev(dev, &sp->rx_desc[i - 1]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 return 0;
215}
216
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100217static void seeq_purge_ring(struct net_device *dev)
218{
219 struct sgiseeq_private *sp = netdev_priv(dev);
220 int i;
221
222 /* clear tx ring. */
223 for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
224 if (sp->tx_desc[i].skb) {
225 dev_kfree_skb(sp->tx_desc[i].skb);
226 sp->tx_desc[i].skb = NULL;
227 }
228 }
229
230 /* And now the rx ring. */
231 for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
232 if (sp->rx_desc[i].skb) {
233 dev_kfree_skb(sp->rx_desc[i].skb);
234 sp->rx_desc[i].skb = NULL;
235 }
236 }
237}
238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239#ifdef DEBUG
240static struct sgiseeq_private *gpriv;
241static struct net_device *gdev;
242
Ralf Baechlea4d4d512006-03-08 11:49:31 +0000243static void sgiseeq_dump_rings(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244{
245 static int once;
246 struct sgiseeq_rx_desc *r = gpriv->rx_desc;
247 struct sgiseeq_tx_desc *t = gpriv->tx_desc;
248 struct hpc3_ethregs *hregs = gpriv->hregs;
249 int i;
250
251 if (once)
252 return;
253 once++;
254 printk("RING DUMP:\n");
255 for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
256 printk("RX [%d]: @(%p) [%08x,%08x,%08x] ",
257 i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
258 r[i].rdma.pnext);
259 i += 1;
260 printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
261 i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
262 r[i].rdma.pnext);
263 }
264 for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
265 printk("TX [%d]: @(%p) [%08x,%08x,%08x] ",
266 i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
267 t[i].tdma.pnext);
268 i += 1;
269 printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
270 i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
271 t[i].tdma.pnext);
272 }
273 printk("INFO: [rx_new = %d rx_old=%d] [tx_new = %d tx_old = %d]\n",
274 gpriv->rx_new, gpriv->rx_old, gpriv->tx_new, gpriv->tx_old);
275 printk("RREGS: rx_cbptr[%08x] rx_ndptr[%08x] rx_ctrl[%08x]\n",
276 hregs->rx_cbptr, hregs->rx_ndptr, hregs->rx_ctrl);
277 printk("TREGS: tx_cbptr[%08x] tx_ndptr[%08x] tx_ctrl[%08x]\n",
278 hregs->tx_cbptr, hregs->tx_ndptr, hregs->tx_ctrl);
279}
280#endif
281
282#define TSTAT_INIT_SEEQ (SEEQ_TCMD_IPT|SEEQ_TCMD_I16|SEEQ_TCMD_IC|SEEQ_TCMD_IUF)
283#define TSTAT_INIT_EDLC ((TSTAT_INIT_SEEQ) | SEEQ_TCMD_RB2)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
285static int init_seeq(struct net_device *dev, struct sgiseeq_private *sp,
286 struct sgiseeq_regs *sregs)
287{
288 struct hpc3_ethregs *hregs = sp->hregs;
289 int err;
290
291 reset_hpc3_and_seeq(hregs, sregs);
292 err = seeq_init_ring(dev);
293 if (err)
294 return err;
295
296 /* Setup to field the proper interrupt types. */
297 if (sp->is_edlc) {
298 sregs->tstat = TSTAT_INIT_EDLC;
299 sregs->rw.wregs.control = sp->control;
300 sregs->rw.wregs.frame_gap = 0;
301 } else {
302 sregs->tstat = TSTAT_INIT_SEEQ;
303 }
304
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100305 hregs->rx_ndptr = VIRT_TO_DMA(sp, sp->rx_desc);
306 hregs->tx_ndptr = VIRT_TO_DMA(sp, sp->tx_desc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
308 seeq_go(sp, hregs, sregs);
309 return 0;
310}
311
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700312static void record_rx_errors(struct net_device *dev, unsigned char status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313{
314 if (status & SEEQ_RSTAT_OVERF ||
315 status & SEEQ_RSTAT_SFRAME)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700316 dev->stats.rx_over_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 if (status & SEEQ_RSTAT_CERROR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700318 dev->stats.rx_crc_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 if (status & SEEQ_RSTAT_DERROR)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700320 dev->stats.rx_frame_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 if (status & SEEQ_RSTAT_REOF)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700322 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323}
324
325static inline void rx_maybe_restart(struct sgiseeq_private *sp,
326 struct hpc3_ethregs *hregs,
327 struct sgiseeq_regs *sregs)
328{
329 if (!(hregs->rx_ctrl & HPC3_ERXCTRL_ACTIVE)) {
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100330 hregs->rx_ndptr = VIRT_TO_DMA(sp, sp->rx_desc + sp->rx_new);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 seeq_go(sp, hregs, sregs);
332 }
333}
334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp,
336 struct hpc3_ethregs *hregs,
337 struct sgiseeq_regs *sregs)
338{
339 struct sgiseeq_rx_desc *rd;
Ralf Baechlea4d4d512006-03-08 11:49:31 +0000340 struct sk_buff *skb = NULL;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100341 struct sk_buff *newskb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 unsigned char pkt_status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 int len = 0;
344 unsigned int orig_end = PREV_RX(sp->rx_new);
345
346 /* Service every received packet. */
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100347 rd = &sp->rx_desc[sp->rx_new];
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100348 dma_sync_desc_cpu(dev, rd);
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100349 while (!(rd->rdma.cntinfo & HPCDMA_OWN)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 len = PKT_BUF_SZ - (rd->rdma.cntinfo & HPCDMA_BCNT) - 3;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100351 dma_unmap_single(dev->dev.parent, rd->rdma.pbuf,
352 PKT_BUF_SZ, DMA_FROM_DEVICE);
353 pkt_status = rd->skb->data[len];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 if (pkt_status & SEEQ_RSTAT_FIG) {
355 /* Packet is OK. */
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100356 /* We don't want to receive our own packets */
357 if (memcmp(rd->skb->data + 6, dev->dev_addr, ETH_ALEN)) {
358 if (len > rx_copybreak) {
359 skb = rd->skb;
360 newskb = netdev_alloc_skb(dev, PKT_BUF_SZ);
361 if (!newskb) {
362 newskb = skb;
363 skb = NULL;
364 goto memory_squeeze;
365 }
366 skb_reserve(newskb, 2);
367 } else {
Eric Dumazet89d71a62009-10-13 05:34:20 +0000368 skb = netdev_alloc_skb_ip_align(dev, len);
369 if (skb)
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100370 skb_copy_to_linear_data(skb, rd->skb->data, len);
Eric Dumazet89d71a62009-10-13 05:34:20 +0000371
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100372 newskb = rd->skb;
373 }
374memory_squeeze:
375 if (skb) {
376 skb_put(skb, len);
377 skb->protocol = eth_type_trans(skb, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 netif_rx(skb);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700379 dev->stats.rx_packets++;
380 dev->stats.rx_bytes += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 } else {
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100382 printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n",
383 dev->name);
384 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 }
386 } else {
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100387 /* Silently drop my own packets */
388 newskb = rd->skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 }
390 } else {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700391 record_rx_errors(dev, pkt_status);
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100392 newskb = rd->skb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 }
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100394 rd->skb = newskb;
395 rd->rdma.pbuf = dma_map_single(dev->dev.parent,
396 newskb->data - 2,
397 PKT_BUF_SZ, DMA_FROM_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
399 /* Return the entry to the ring pool. */
400 rd->rdma.cntinfo = RCNTINFO_INIT;
401 sp->rx_new = NEXT_RX(sp->rx_new);
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100402 dma_sync_desc_dev(dev, rd);
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100403 rd = &sp->rx_desc[sp->rx_new];
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100404 dma_sync_desc_cpu(dev, rd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 }
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100406 dma_sync_desc_cpu(dev, &sp->rx_desc[orig_end]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 sp->rx_desc[orig_end].rdma.cntinfo &= ~(HPCDMA_EOR);
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100408 dma_sync_desc_dev(dev, &sp->rx_desc[orig_end]);
409 dma_sync_desc_cpu(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 sp->rx_desc[PREV_RX(sp->rx_new)].rdma.cntinfo |= HPCDMA_EOR;
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100411 dma_sync_desc_dev(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 rx_maybe_restart(sp, hregs, sregs);
413}
414
415static inline void tx_maybe_reset_collisions(struct sgiseeq_private *sp,
416 struct sgiseeq_regs *sregs)
417{
418 if (sp->is_edlc) {
419 sregs->rw.wregs.control = sp->control & ~(SEEQ_CTRL_XCNT);
420 sregs->rw.wregs.control = sp->control;
421 }
422}
423
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100424static inline void kick_tx(struct net_device *dev,
425 struct sgiseeq_private *sp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 struct hpc3_ethregs *hregs)
427{
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100428 struct sgiseeq_tx_desc *td;
429 int i = sp->tx_old;
430
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 /* If the HPC aint doin nothin, and there are more packets
432 * with ETXD cleared and XIU set we must make very certain
433 * that we restart the HPC else we risk locking up the
434 * adapter. The following code is only safe iff the HPCDMA
435 * is not active!
436 */
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100437 td = &sp->tx_desc[i];
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100438 dma_sync_desc_cpu(dev, td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 while ((td->tdma.cntinfo & (HPCDMA_XIU | HPCDMA_ETXD)) ==
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100440 (HPCDMA_XIU | HPCDMA_ETXD)) {
441 i = NEXT_TX(i);
442 td = &sp->tx_desc[i];
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100443 dma_sync_desc_cpu(dev, td);
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100444 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 if (td->tdma.cntinfo & HPCDMA_XIU) {
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100446 hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
448 }
449}
450
451static inline void sgiseeq_tx(struct net_device *dev, struct sgiseeq_private *sp,
452 struct hpc3_ethregs *hregs,
453 struct sgiseeq_regs *sregs)
454{
455 struct sgiseeq_tx_desc *td;
456 unsigned long status = hregs->tx_ctrl;
457 int j;
458
459 tx_maybe_reset_collisions(sp, sregs);
460
461 if (!(status & (HPC3_ETXCTRL_ACTIVE | SEEQ_TSTAT_PTRANS))) {
462 /* Oops, HPC detected some sort of error. */
463 if (status & SEEQ_TSTAT_R16)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700464 dev->stats.tx_aborted_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 if (status & SEEQ_TSTAT_UFLOW)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700466 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 if (status & SEEQ_TSTAT_LCLS)
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700468 dev->stats.collisions++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 }
470
471 /* Ack 'em... */
472 for (j = sp->tx_old; j != sp->tx_new; j = NEXT_TX(j)) {
473 td = &sp->tx_desc[j];
474
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100475 dma_sync_desc_cpu(dev, td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 if (!(td->tdma.cntinfo & (HPCDMA_XIU)))
477 break;
478 if (!(td->tdma.cntinfo & (HPCDMA_ETXD))) {
479 if (!(status & HPC3_ETXCTRL_ACTIVE)) {
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100480 hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
482 }
483 break;
484 }
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700485 dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 sp->tx_old = NEXT_TX(sp->tx_old);
487 td->tdma.cntinfo &= ~(HPCDMA_XIU | HPCDMA_XIE);
488 td->tdma.cntinfo |= HPCDMA_EOX;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100489 if (td->skb) {
490 dev_kfree_skb_any(td->skb);
491 td->skb = NULL;
492 }
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100493 dma_sync_desc_dev(dev, td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 }
495}
496
David Howells7d12e782006-10-05 14:55:46 +0100497static irqreturn_t sgiseeq_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498{
499 struct net_device *dev = (struct net_device *) dev_id;
500 struct sgiseeq_private *sp = netdev_priv(dev);
501 struct hpc3_ethregs *hregs = sp->hregs;
502 struct sgiseeq_regs *sregs = sp->sregs;
503
504 spin_lock(&sp->tx_lock);
505
506 /* Ack the IRQ and set software state. */
Ralf Baechle302a5c4b2005-10-10 14:50:56 +0100507 hregs->reset = HPC3_ERST_CLRIRQ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
509 /* Always check for received packets. */
510 sgiseeq_rx(dev, sp, hregs, sregs);
511
512 /* Only check for tx acks if we have something queued. */
513 if (sp->tx_old != sp->tx_new)
514 sgiseeq_tx(dev, sp, hregs, sregs);
515
516 if ((TX_BUFFS_AVAIL(sp) > 0) && netif_queue_stopped(dev)) {
517 netif_wake_queue(dev);
518 }
519 spin_unlock(&sp->tx_lock);
520
521 return IRQ_HANDLED;
522}
523
524static int sgiseeq_open(struct net_device *dev)
525{
526 struct sgiseeq_private *sp = netdev_priv(dev);
527 struct sgiseeq_regs *sregs = sp->sregs;
528 unsigned int irq = dev->irq;
529 int err;
530
531 if (request_irq(irq, sgiseeq_interrupt, 0, sgiseeqstr, dev)) {
532 printk(KERN_ERR "Seeq8003: Can't get irq %d\n", dev->irq);
533 err = -EAGAIN;
534 }
535
536 err = init_seeq(dev, sp, sregs);
537 if (err)
538 goto out_free_irq;
539
540 netif_start_queue(dev);
541
542 return 0;
543
544out_free_irq:
545 free_irq(irq, dev);
546
547 return err;
548}
549
550static int sgiseeq_close(struct net_device *dev)
551{
552 struct sgiseeq_private *sp = netdev_priv(dev);
553 struct sgiseeq_regs *sregs = sp->sregs;
Ralf Baechle28914392005-10-10 14:50:51 +0100554 unsigned int irq = dev->irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555
556 netif_stop_queue(dev);
557
558 /* Shutdown the Seeq. */
559 reset_hpc3_and_seeq(sp->hregs, sregs);
Ralf Baechle28914392005-10-10 14:50:51 +0100560 free_irq(irq, dev);
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100561 seeq_purge_ring(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562
563 return 0;
564}
565
566static inline int sgiseeq_reset(struct net_device *dev)
567{
568 struct sgiseeq_private *sp = netdev_priv(dev);
569 struct sgiseeq_regs *sregs = sp->sregs;
570 int err;
571
572 err = init_seeq(dev, sp, sregs);
573 if (err)
574 return err;
575
576 dev->trans_start = jiffies;
577 netif_wake_queue(dev);
578
579 return 0;
580}
581
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582static int sgiseeq_start_xmit(struct sk_buff *skb, struct net_device *dev)
583{
584 struct sgiseeq_private *sp = netdev_priv(dev);
585 struct hpc3_ethregs *hregs = sp->hregs;
586 unsigned long flags;
587 struct sgiseeq_tx_desc *td;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100588 int len, entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
590 spin_lock_irqsave(&sp->tx_lock, flags);
591
592 /* Setup... */
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100593 len = skb->len;
594 if (len < ETH_ZLEN) {
595 if (skb_padto(skb, ETH_ZLEN))
Patrick McHardy6ed10652009-06-23 06:03:08 +0000596 return NETDEV_TX_OK;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100597 len = ETH_ZLEN;
598 }
599
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700600 dev->stats.tx_bytes += len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 entry = sp->tx_new;
602 td = &sp->tx_desc[entry];
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100603 dma_sync_desc_cpu(dev, td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
605 /* Create entry. There are so many races with adding a new
606 * descriptor to the chain:
607 * 1) Assume that the HPC is off processing a DMA chain while
608 * we are changing all of the following.
609 * 2) Do no allow the HPC to look at a new descriptor until
610 * we have completely set up it's state. This means, do
611 * not clear HPCDMA_EOX in the current last descritptor
612 * until the one we are adding looks consistent and could
613 * be processes right now.
614 * 3) The tx interrupt code must notice when we've added a new
615 * entry and the HPC got to the end of the chain before we
616 * added this new entry and restarted it.
617 */
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100618 td->skb = skb;
619 td->tdma.pbuf = dma_map_single(dev->dev.parent, skb->data,
620 len, DMA_TO_DEVICE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 td->tdma.cntinfo = (len & HPCDMA_BCNT) |
622 HPCDMA_XIU | HPCDMA_EOXP | HPCDMA_XIE | HPCDMA_EOX;
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100623 dma_sync_desc_dev(dev, td);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 if (sp->tx_old != sp->tx_new) {
625 struct sgiseeq_tx_desc *backend;
626
627 backend = &sp->tx_desc[PREV_TX(sp->tx_new)];
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100628 dma_sync_desc_cpu(dev, backend);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 backend->tdma.cntinfo &= ~HPCDMA_EOX;
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100630 dma_sync_desc_dev(dev, backend);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 }
632 sp->tx_new = NEXT_TX(sp->tx_new); /* Advance. */
633
634 /* Maybe kick the HPC back into motion. */
635 if (!(hregs->tx_ctrl & HPC3_ETXCTRL_ACTIVE))
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100636 kick_tx(dev, sp, hregs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637
638 dev->trans_start = jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
640 if (!TX_BUFFS_AVAIL(sp))
641 netif_stop_queue(dev);
642 spin_unlock_irqrestore(&sp->tx_lock, flags);
643
Patrick McHardy6ed10652009-06-23 06:03:08 +0000644 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645}
646
647static void timeout(struct net_device *dev)
648{
649 printk(KERN_NOTICE "%s: transmit timed out, resetting\n", dev->name);
650 sgiseeq_reset(dev);
651
652 dev->trans_start = jiffies;
653 netif_wake_queue(dev);
654}
655
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656static void sgiseeq_set_multicast(struct net_device *dev)
657{
Wang Chen8f15ea42008-11-12 23:38:36 -0800658 struct sgiseeq_private *sp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 unsigned char oldmode = sp->mode;
660
661 if(dev->flags & IFF_PROMISC)
662 sp->mode = SEEQ_RCMD_RANY;
Jiri Pirko4cd24ea2010-02-08 04:30:35 +0000663 else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 sp->mode = SEEQ_RCMD_RBMCAST;
665 else
666 sp->mode = SEEQ_RCMD_RBCAST;
667
668 /* XXX I know this sucks, but is there a better way to reprogram
669 * XXX the receiver? At least, this shouldn't happen too often.
670 */
671
672 if (oldmode != sp->mode)
673 sgiseeq_reset(dev);
674}
675
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100676static inline void setup_tx_ring(struct net_device *dev,
677 struct sgiseeq_tx_desc *buf,
678 int nbufs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679{
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100680 struct sgiseeq_private *sp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 int i = 0;
682
683 while (i < (nbufs - 1)) {
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100684 buf[i].tdma.pnext = VIRT_TO_DMA(sp, buf + i + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 buf[i].tdma.pbuf = 0;
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100686 dma_sync_desc_dev(dev, &buf[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 i++;
688 }
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100689 buf[i].tdma.pnext = VIRT_TO_DMA(sp, buf);
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100690 dma_sync_desc_dev(dev, &buf[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691}
692
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100693static inline void setup_rx_ring(struct net_device *dev,
694 struct sgiseeq_rx_desc *buf,
695 int nbufs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696{
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100697 struct sgiseeq_private *sp = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 int i = 0;
699
700 while (i < (nbufs - 1)) {
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100701 buf[i].rdma.pnext = VIRT_TO_DMA(sp, buf + i + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 buf[i].rdma.pbuf = 0;
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100703 dma_sync_desc_dev(dev, &buf[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 i++;
705 }
706 buf[i].rdma.pbuf = 0;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100707 buf[i].rdma.pnext = VIRT_TO_DMA(sp, buf);
Thomas Bogendoerfer49b11bc2007-12-19 13:42:36 +0100708 dma_sync_desc_dev(dev, &buf[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709}
710
Alexander Beregalov8c2c6be2009-04-15 12:52:58 +0000711static const struct net_device_ops sgiseeq_netdev_ops = {
712 .ndo_open = sgiseeq_open,
713 .ndo_stop = sgiseeq_close,
714 .ndo_start_xmit = sgiseeq_start_xmit,
715 .ndo_tx_timeout = timeout,
716 .ndo_set_multicast_list = sgiseeq_set_multicast,
717 .ndo_set_mac_address = sgiseeq_set_mac_address,
718 .ndo_change_mtu = eth_change_mtu,
719 .ndo_validate_addr = eth_validate_addr,
720};
721
Uwe Kleine-Königa65a6882009-07-21 11:25:26 +0000722static int __devinit sgiseeq_probe(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723{
Ralf Baechledf9f5402007-05-11 15:48:58 +0100724 struct sgiseeq_platform_data *pd = pdev->dev.platform_data;
725 struct hpc3_regs *hpcregs = pd->hpc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 struct sgiseeq_init_block *sr;
Ralf Baechledf9f5402007-05-11 15:48:58 +0100727 unsigned int irq = pd->irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 struct sgiseeq_private *sp;
729 struct net_device *dev;
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100730 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731
732 dev = alloc_etherdev(sizeof (struct sgiseeq_private));
733 if (!dev) {
734 printk(KERN_ERR "Sgiseeq: Etherdev alloc failed, aborting.\n");
735 err = -ENOMEM;
736 goto err_out;
737 }
Ralf Baechledf9f5402007-05-11 15:48:58 +0100738
739 platform_set_drvdata(pdev, dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 sp = netdev_priv(dev);
741
742 /* Make private data page aligned */
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100743 sr = dma_alloc_noncoherent(&pdev->dev, sizeof(*sp->srings),
Ralf Baechle99cd1492007-09-04 14:41:01 +0100744 &sp->srings_dma, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 if (!sr) {
746 printk(KERN_ERR "Sgiseeq: Page alloc failed, aborting.\n");
747 err = -ENOMEM;
748 goto err_out_free_dev;
749 }
750 sp->srings = sr;
Ralf Baechle99cd1492007-09-04 14:41:01 +0100751 sp->rx_desc = sp->srings->rxvector;
752 sp->tx_desc = sp->srings->txvector;
753
754 /* A couple calculations now, saves many cycles later. */
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100755 setup_rx_ring(dev, sp->rx_desc, SEEQ_RX_BUFFERS);
756 setup_tx_ring(dev, sp->tx_desc, SEEQ_TX_BUFFERS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
Ralf Baechledf9f5402007-05-11 15:48:58 +0100758 memcpy(dev->dev_addr, pd->mac, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
760#ifdef DEBUG
761 gpriv = sp;
762 gdev = dev;
763#endif
Ralf Baechle302a5c4b2005-10-10 14:50:56 +0100764 sp->sregs = (struct sgiseeq_regs *) &hpcregs->eth_ext[0];
765 sp->hregs = &hpcregs->ethregs;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 sp->name = sgiseeqstr;
767 sp->mode = SEEQ_RCMD_RBCAST;
768
Ralf Baechle302a5c4b2005-10-10 14:50:56 +0100769 /* Setup PIO and DMA transfer timing */
770 sp->hregs->pconfig = 0x161;
771 sp->hregs->dconfig = HPC3_EDCFG_FIRQ | HPC3_EDCFG_FEOP |
772 HPC3_EDCFG_FRXDC | HPC3_EDCFG_PTO | 0x026;
773
Ladislav Michl78ee5b32007-02-28 01:18:35 +0000774 /* Setup PIO and DMA transfer timing */
775 sp->hregs->pconfig = 0x161;
776 sp->hregs->dconfig = HPC3_EDCFG_FIRQ | HPC3_EDCFG_FEOP |
777 HPC3_EDCFG_FRXDC | HPC3_EDCFG_PTO | 0x026;
778
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 /* Reset the chip. */
780 hpc3_eth_reset(sp->hregs);
781
782 sp->is_edlc = !(sp->sregs->rw.rregs.collision_tx[0] & 0xff);
783 if (sp->is_edlc)
784 sp->control = SEEQ_CTRL_XCNT | SEEQ_CTRL_ACCNT |
785 SEEQ_CTRL_SFLAG | SEEQ_CTRL_ESHORT |
786 SEEQ_CTRL_ENCARR;
787
Alexander Beregalov8c2c6be2009-04-15 12:52:58 +0000788 dev->netdev_ops = &sgiseeq_netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 dev->watchdog_timeo = (200 * HZ) / 1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 dev->irq = irq;
791
792 if (register_netdev(dev)) {
793 printk(KERN_ERR "Sgiseeq: Cannot register net device, "
794 "aborting.\n");
795 err = -ENODEV;
796 goto err_out_free_page;
797 }
798
Johannes Berge1749612008-10-27 15:59:26 -0700799 printk(KERN_INFO "%s: %s %pM\n", dev->name, sgiseeqstr, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 return 0;
802
803err_out_free_page:
Ralf Baechle28914392005-10-10 14:50:51 +0100804 free_page((unsigned long) sp->srings);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805err_out_free_dev:
806 kfree(dev);
807
808err_out:
809 return err;
810}
811
Ralf Baechlee3efb052007-08-22 16:03:52 +0100812static int __exit sgiseeq_remove(struct platform_device *pdev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813{
Ralf Baechledf9f5402007-05-11 15:48:58 +0100814 struct net_device *dev = platform_get_drvdata(pdev);
815 struct sgiseeq_private *sp = netdev_priv(dev);
Ladislav Michl78ee5b32007-02-28 01:18:35 +0000816
Ralf Baechledf9f5402007-05-11 15:48:58 +0100817 unregister_netdev(dev);
Thomas Bogendoerfer43831b12007-11-24 13:29:19 +0100818 dma_free_noncoherent(&pdev->dev, sizeof(*sp->srings), sp->srings,
819 sp->srings_dma);
Ralf Baechledf9f5402007-05-11 15:48:58 +0100820 free_netdev(dev);
821 platform_set_drvdata(pdev, NULL);
Ralf Baechlee3efb052007-08-22 16:03:52 +0100822
823 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824}
825
Ralf Baechledf9f5402007-05-11 15:48:58 +0100826static struct platform_driver sgiseeq_driver = {
827 .probe = sgiseeq_probe,
Uwe Kleine-Königfb74c2f2009-09-30 22:28:26 +0000828 .remove = __exit_p(sgiseeq_remove),
Ralf Baechledf9f5402007-05-11 15:48:58 +0100829 .driver = {
Kay Sievers72abb462008-04-18 13:50:44 -0700830 .name = "sgiseeq",
831 .owner = THIS_MODULE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 }
Ralf Baechledf9f5402007-05-11 15:48:58 +0100833};
834
835static int __init sgiseeq_module_init(void)
836{
837 if (platform_driver_register(&sgiseeq_driver)) {
838 printk(KERN_ERR "Driver registration failed\n");
839 return -ENODEV;
840 }
841
842 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843}
844
Ralf Baechledf9f5402007-05-11 15:48:58 +0100845static void __exit sgiseeq_module_exit(void)
846{
847 platform_driver_unregister(&sgiseeq_driver);
848}
849
850module_init(sgiseeq_module_init);
851module_exit(sgiseeq_module_exit);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
Ralf Baechle302a5c4b2005-10-10 14:50:56 +0100853MODULE_DESCRIPTION("SGI Seeq 8003 driver");
854MODULE_AUTHOR("Linux/MIPS Mailing List <linux-mips@linux-mips.org>");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855MODULE_LICENSE("GPL");
Kay Sievers72abb462008-04-18 13:50:44 -0700856MODULE_ALIAS("platform:sgiseeq");