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ceph: move readahead default to fs/ceph from libceph
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / netx-eth.c
blob2e4b42175f3fb3ff6fdae5d0d8b6fceac17af87d
1 /*
2 * drivers/net/netx-eth.c
3 *
4 * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include <linux/init.h>
21 #include <linux/module.h>
22 #include <linux/kernel.h>
23 #include <linux/delay.h>
24
25 #include <linux/netdevice.h>
26 #include <linux/platform_device.h>
27 #include <linux/etherdevice.h>
28 #include <linux/skbuff.h>
29 #include <linux/mii.h>
30
31 #include <asm/io.h>
32 #include <mach/hardware.h>
33 #include <mach/netx-regs.h>
34 #include <mach/pfifo.h>
35 #include <mach/xc.h>
36 #include <mach/eth.h>
37
38 /* XC Fifo Offsets */
39 #define EMPTY_PTR_FIFO(xcno) (0 + ((xcno) << 3)) /* Index of the empty pointer FIFO */
40 #define IND_FIFO_PORT_HI(xcno) (1 + ((xcno) << 3)) /* Index of the FIFO where received */
41 /* Data packages are indicated by XC */
42 #define IND_FIFO_PORT_LO(xcno) (2 + ((xcno) << 3)) /* Index of the FIFO where received */
43 /* Data packages are indicated by XC */
44 #define REQ_FIFO_PORT_HI(xcno) (3 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
45 /* have to be indicated by ARM which */
46 /* shall be sent */
47 #define REQ_FIFO_PORT_LO(xcno) (4 + ((xcno) << 3)) /* Index of the FIFO where Data packages */
48 /* have to be indicated by ARM which shall */
49 /* be sent */
50 #define CON_FIFO_PORT_HI(xcno) (5 + ((xcno) << 3)) /* Index of the FIFO where sent Data packages */
51 /* are confirmed */
52 #define CON_FIFO_PORT_LO(xcno) (6 + ((xcno) << 3)) /* Index of the FIFO where sent Data */
53 /* packages are confirmed */
54 #define PFIFO_MASK(xcno) (0x7f << (xcno*8))
55
56 #define FIFO_PTR_FRAMELEN_SHIFT 0
57 #define FIFO_PTR_FRAMELEN_MASK (0x7ff << 0)
58 #define FIFO_PTR_FRAMELEN(len) (((len) << 0) & FIFO_PTR_FRAMELEN_MASK)
59 #define FIFO_PTR_TIMETRIG (1<<11)
60 #define FIFO_PTR_MULTI_REQ
61 #define FIFO_PTR_ORIGIN (1<<14)
62 #define FIFO_PTR_VLAN (1<<15)
63 #define FIFO_PTR_FRAMENO_SHIFT 16
64 #define FIFO_PTR_FRAMENO_MASK (0x3f << 16)
65 #define FIFO_PTR_FRAMENO(no) (((no) << 16) & FIFO_PTR_FRAMENO_MASK)
66 #define FIFO_PTR_SEGMENT_SHIFT 22
67 #define FIFO_PTR_SEGMENT_MASK (0xf << 22)
68 #define FIFO_PTR_SEGMENT(seg) (((seg) & 0xf) << 22)
69 #define FIFO_PTR_ERROR_SHIFT 28
70 #define FIFO_PTR_ERROR_MASK (0xf << 28)
71
72 #define ISR_LINK_STATUS_CHANGE (1<<4)
73 #define ISR_IND_LO (1<<3)
74 #define ISR_CON_LO (1<<2)
75 #define ISR_IND_HI (1<<1)
76 #define ISR_CON_HI (1<<0)
77
78 #define ETH_MAC_LOCAL_CONFIG 0x1560
79 #define ETH_MAC_4321 0x1564
80 #define ETH_MAC_65 0x1568
81
82 #define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16
83 #define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT)
84 #define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK)
85 #define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24)
86 #define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23)
87 #define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22)
88 #define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21)
89 #define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20)
90
91 #define CARDNAME "netx-eth"
92
93 /* LSB must be zero */
94 #define INTERNAL_PHY_ADR 0x1c
95
96 struct netx_eth_priv {
97 void __iomem *sram_base, *xpec_base, *xmac_base;
98 int id;
99 struct mii_if_info mii;
100 u32 msg_enable;
101 struct xc *xc;
102 spinlock_t lock;
103 };
104
105 static void netx_eth_set_multicast_list(struct net_device *ndev)
106 {
107 /* implement me */
108 }
109
110 static int
111 netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
112 {
113 struct netx_eth_priv *priv = netdev_priv(ndev);
114 unsigned char *buf = skb->data;
115 unsigned int len = skb->len;
116
117 spin_lock_irq(&priv->lock);
118 memcpy_toio(priv->sram_base + 1560, (void *)buf, len);
119 if (len < 60) {
120 memset_io(priv->sram_base + 1560 + len, 0, 60 - len);
121 len = 60;
122 }
123
124 pfifo_push(REQ_FIFO_PORT_LO(priv->id),
125 FIFO_PTR_SEGMENT(priv->id) |
126 FIFO_PTR_FRAMENO(1) |
127 FIFO_PTR_FRAMELEN(len));
128
129 ndev->stats.tx_packets++;
130 ndev->stats.tx_bytes += skb->len;
131
132 netif_stop_queue(ndev);
133 spin_unlock_irq(&priv->lock);
134 dev_kfree_skb(skb);
135
136 return NETDEV_TX_OK;
137 }
138
139 static void netx_eth_receive(struct net_device *ndev)
140 {
141 struct netx_eth_priv *priv = netdev_priv(ndev);
142 unsigned int val, frameno, seg, len;
143 unsigned char *data;
144 struct sk_buff *skb;
145
146 val = pfifo_pop(IND_FIFO_PORT_LO(priv->id));
147
148 frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT;
149 seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT;
150 len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT;
151
152 skb = dev_alloc_skb(len);
153 if (unlikely(skb == NULL)) {
154 printk(KERN_NOTICE "%s: Low memory, packet dropped.\n",
155 ndev->name);
156 ndev->stats.rx_dropped++;
157 return;
158 }
159
160 data = skb_put(skb, len);
161
162 memcpy_fromio(data, priv->sram_base + frameno * 1560, len);
163
164 pfifo_push(EMPTY_PTR_FIFO(priv->id),
165 FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno));
166
167 skb->protocol = eth_type_trans(skb, ndev);
168 netif_rx(skb);
169 ndev->stats.rx_packets++;
170 ndev->stats.rx_bytes += len;
171 }
172
173 static irqreturn_t
174 netx_eth_interrupt(int irq, void *dev_id)
175 {
176 struct net_device *ndev = dev_id;
177 struct netx_eth_priv *priv = netdev_priv(ndev);
178 int status;
179 unsigned long flags;
180
181 spin_lock_irqsave(&priv->lock, flags);
182
183 status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
184 while (status) {
185 int fill_level;
186 writel(status, NETX_PFIFO_XPEC_ISR(priv->id));
187
188 if ((status & ISR_CON_HI) || (status & ISR_IND_HI))
189 printk("%s: unexpected status: 0x%08x\n",
190 __func__, status);
191
192 fill_level =
193 readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));
194 while (fill_level--)
195 netx_eth_receive(ndev);
196
197 if (status & ISR_CON_LO)
198 netif_wake_queue(ndev);
199
200 if (status & ISR_LINK_STATUS_CHANGE)
201 mii_check_media(&priv->mii, netif_msg_link(priv), 1);
202
203 status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
204 }
205 spin_unlock_irqrestore(&priv->lock, flags);
206 return IRQ_HANDLED;
207 }
208
209 static int netx_eth_open(struct net_device *ndev)
210 {
211 struct netx_eth_priv *priv = netdev_priv(ndev);
212
213 if (request_irq
214 (ndev->irq, netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev))
215 return -EAGAIN;
216
217 writel(ndev->dev_addr[0] |
218 ndev->dev_addr[1]<<8 |
219 ndev->dev_addr[2]<<16 |
220 ndev->dev_addr[3]<<24,
221 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
222 writel(ndev->dev_addr[4] |
223 ndev->dev_addr[5]<<8,
224 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
225
226 writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |
227 LOCAL_CONFIG_CON_LO_IRQ_EN |
228 LOCAL_CONFIG_CON_HI_IRQ_EN |
229 LOCAL_CONFIG_IND_LO_IRQ_EN |
230 LOCAL_CONFIG_IND_HI_IRQ_EN,
231 priv->xpec_base + NETX_XPEC_RAM_START_OFS +
232 ETH_MAC_LOCAL_CONFIG);
233
234 mii_check_media(&priv->mii, netif_msg_link(priv), 1);
235 netif_start_queue(ndev);
236
237 return 0;
238 }
239
240 static int netx_eth_close(struct net_device *ndev)
241 {
242 struct netx_eth_priv *priv = netdev_priv(ndev);
243
244 netif_stop_queue(ndev);
245
246 writel(0,
247 priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG);
248
249 free_irq(ndev->irq, ndev);
250
251 return 0;
252 }
253
254 static void netx_eth_timeout(struct net_device *ndev)
255 {
256 struct netx_eth_priv *priv = netdev_priv(ndev);
257 int i;
258
259 printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name);
260
261 spin_lock_irq(&priv->lock);
262
263 xc_reset(priv->xc);
264 xc_start(priv->xc);
265
266 for (i=2; i<=18; i++)
267 pfifo_push(EMPTY_PTR_FIFO(priv->id),
268 FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
269
270 spin_unlock_irq(&priv->lock);
271
272 netif_wake_queue(ndev);
273 }
274
275 static int
276 netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg)
277 {
278 unsigned int val;
279
280 val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
281 MIIMU_REGADDR(reg) | MIIMU_PHY_NRES;
282
283 writel(val, NETX_MIIMU);
284 while (readl(NETX_MIIMU) & MIIMU_SNRDY);
285
286 return readl(NETX_MIIMU) >> 16;
287
288 }
289
290 static void
291 netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value)
292 {
293 unsigned int val;
294
295 val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
296 MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE |
297 MIIMU_DATA(value);
298
299 writel(val, NETX_MIIMU);
300 while (readl(NETX_MIIMU) & MIIMU_SNRDY);
301 }
302
303 static const struct net_device_ops netx_eth_netdev_ops = {
304 .ndo_open = netx_eth_open,
305 .ndo_stop = netx_eth_close,
306 .ndo_start_xmit = netx_eth_hard_start_xmit,
307 .ndo_tx_timeout = netx_eth_timeout,
308 .ndo_set_multicast_list = netx_eth_set_multicast_list,
309 .ndo_change_mtu = eth_change_mtu,
310 .ndo_validate_addr = eth_validate_addr,
311 .ndo_set_mac_address = eth_mac_addr,
312 };
313
314 static int netx_eth_enable(struct net_device *ndev)
315 {
316 struct netx_eth_priv *priv = netdev_priv(ndev);
317 unsigned int mac4321, mac65;
318 int running, i;
319
320 ether_setup(ndev);
321
322 ndev->netdev_ops = &netx_eth_netdev_ops;
323 ndev->watchdog_timeo = msecs_to_jiffies(5000);
324
325 priv->msg_enable = NETIF_MSG_LINK;
326 priv->mii.phy_id_mask = 0x1f;
327 priv->mii.reg_num_mask = 0x1f;
328 priv->mii.force_media = 0;
329 priv->mii.full_duplex = 0;
330 priv->mii.dev = ndev;
331 priv->mii.mdio_read = netx_eth_phy_read;
332 priv->mii.mdio_write = netx_eth_phy_write;
333 priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id;
334
335 running = xc_running(priv->xc);
336 xc_stop(priv->xc);
337
338 /* if the xc engine is already running, assume the bootloader has
339 * loaded the firmware for us
340 */
341 if (running) {
342 /* get Node Address from hardware */
343 mac4321 = readl(priv->xpec_base +
344 NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
345 mac65 = readl(priv->xpec_base +
346 NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
347
348 ndev->dev_addr[0] = mac4321 & 0xff;
349 ndev->dev_addr[1] = (mac4321 >> 8) & 0xff;
350 ndev->dev_addr[2] = (mac4321 >> 16) & 0xff;
351 ndev->dev_addr[3] = (mac4321 >> 24) & 0xff;
352 ndev->dev_addr[4] = mac65 & 0xff;
353 ndev->dev_addr[5] = (mac65 >> 8) & 0xff;
354 } else {
355 if (xc_request_firmware(priv->xc)) {
356 printk(CARDNAME ": requesting firmware failed\n");
357 return -ENODEV;
358 }
359 }
360
361 xc_reset(priv->xc);
362 xc_start(priv->xc);
363
364 if (!is_valid_ether_addr(ndev->dev_addr))
365 printk("%s: Invalid ethernet MAC address. Please "
366 "set using ifconfig\n", ndev->name);
367
368 for (i=2; i<=18; i++)
369 pfifo_push(EMPTY_PTR_FIFO(priv->id),
370 FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));
371
372 return register_netdev(ndev);
373
374 }
375
376 static int netx_eth_drv_probe(struct platform_device *pdev)
377 {
378 struct netx_eth_priv *priv;
379 struct net_device *ndev;
380 struct netxeth_platform_data *pdata;
381 int ret;
382
383 ndev = alloc_etherdev(sizeof (struct netx_eth_priv));
384 if (!ndev) {
385 printk("%s: could not allocate device.\n", CARDNAME);
386 ret = -ENOMEM;
387 goto exit;
388 }
389 SET_NETDEV_DEV(ndev, &pdev->dev);
390
391 platform_set_drvdata(pdev, ndev);
392
393 priv = netdev_priv(ndev);
394
395 pdata = (struct netxeth_platform_data *)pdev->dev.platform_data;
396 priv->xc = request_xc(pdata->xcno, &pdev->dev);
397 if (!priv->xc) {
398 dev_err(&pdev->dev, "unable to request xc engine\n");
399 ret = -ENODEV;
400 goto exit_free_netdev;
401 }
402
403 ndev->irq = priv->xc->irq;
404 priv->id = pdev->id;
405 priv->xpec_base = priv->xc->xpec_base;
406 priv->xmac_base = priv->xc->xmac_base;
407 priv->sram_base = priv->xc->sram_base;
408
409 spin_lock_init(&priv->lock);
410
411 ret = pfifo_request(PFIFO_MASK(priv->id));
412 if (ret) {
413 printk("unable to request PFIFO\n");
414 goto exit_free_xc;
415 }
416
417 ret = netx_eth_enable(ndev);
418 if (ret)
419 goto exit_free_pfifo;
420
421 return 0;
422 exit_free_pfifo:
423 pfifo_free(PFIFO_MASK(priv->id));
424 exit_free_xc:
425 free_xc(priv->xc);
426 exit_free_netdev:
427 platform_set_drvdata(pdev, NULL);
428 free_netdev(ndev);
429 exit:
430 return ret;
431 }
432
433 static int netx_eth_drv_remove(struct platform_device *pdev)
434 {
435 struct net_device *ndev = dev_get_drvdata(&pdev->dev);
436 struct netx_eth_priv *priv = netdev_priv(ndev);
437
438 platform_set_drvdata(pdev, NULL);
439
440 unregister_netdev(ndev);
441 xc_stop(priv->xc);
442 free_xc(priv->xc);
443 free_netdev(ndev);
444 pfifo_free(PFIFO_MASK(priv->id));
445
446 return 0;
447 }
448
449 static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state)
450 {
451 dev_err(&pdev->dev, "suspend not implemented\n");
452 return 0;
453 }
454
455 static int netx_eth_drv_resume(struct platform_device *pdev)
456 {
457 dev_err(&pdev->dev, "resume not implemented\n");
458 return 0;
459 }
460
461 static struct platform_driver netx_eth_driver = {
462 .probe = netx_eth_drv_probe,
463 .remove = netx_eth_drv_remove,
464 .suspend = netx_eth_drv_suspend,
465 .resume = netx_eth_drv_resume,
466 .driver = {
467 .name = CARDNAME,
468 .owner = THIS_MODULE,
469 },
470 };
471
472 static int __init netx_eth_init(void)
473 {
474 unsigned int phy_control, val;
475
476 printk("NetX Ethernet driver\n");
477
478 phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) |
479 PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) |
480 PHY_CONTROL_PHY1_AUTOMDIX |
481 PHY_CONTROL_PHY1_EN |
482 PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) |
483 PHY_CONTROL_PHY0_AUTOMDIX |
484 PHY_CONTROL_PHY0_EN |
485 PHY_CONTROL_CLK_XLATIN;
486
487 val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
488 writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
489
490 writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL);
491 udelay(100);
492
493 val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
494 writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);
495
496 writel(phy_control, NETX_SYSTEM_PHY_CONTROL);
497
498 return platform_driver_register(&netx_eth_driver);
499 }
500
501 static void __exit netx_eth_cleanup(void)
502 {
503 platform_driver_unregister(&netx_eth_driver);
504 }
505
506 module_init(netx_eth_init);
507 module_exit(netx_eth_cleanup);
508
509 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
510 MODULE_LICENSE("GPL");
511 MODULE_ALIAS("platform:" CARDNAME);
512 MODULE_FIRMWARE("xc0.bin");
513 MODULE_FIRMWARE("xc1.bin");
514 MODULE_FIRMWARE("xc2.bin");
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