summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/netx-eth.c
blob: cf6e7eb1b1e1def72326381c87e129ed4e5d429b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
// SPDX-License-Identifier: GPL-2.0-only
/*
 * drivers/net/ethernet/netx-eth.c
 *
 * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
 */

#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/delay.h>

#include <linux/netdevice.h>
#include <linux/platform_device.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/mii.h>

#include <asm/io.h>
#include <mach/hardware.h>
#include <mach/netx-regs.h>
#include <mach/pfifo.h>
#include <mach/xc.h>
#include <linux/platform_data/eth-netx.h>

/* XC Fifo Offsets */
#define EMPTY_PTR_FIFO(xcno)    (0 + ((xcno) << 3))	/* Index of the empty pointer FIFO */
#define IND_FIFO_PORT_HI(xcno)  (1 + ((xcno) << 3))	/* Index of the FIFO where received */
							/* Data packages are indicated by XC */
#define IND_FIFO_PORT_LO(xcno)  (2 + ((xcno) << 3))	/* Index of the FIFO where received */
							/* Data packages are indicated by XC */
#define REQ_FIFO_PORT_HI(xcno)  (3 + ((xcno) << 3))	/* Index of the FIFO where Data packages */
							/* have to be indicated by ARM which */
							/* shall be sent */
#define REQ_FIFO_PORT_LO(xcno)  (4 + ((xcno) << 3))	/* Index of the FIFO where Data packages */
							/* have to be indicated by ARM which shall */
							/* be sent */
#define CON_FIFO_PORT_HI(xcno)  (5 + ((xcno) << 3))	/* Index of the FIFO where sent Data packages */
							/* are confirmed */
#define CON_FIFO_PORT_LO(xcno)  (6 + ((xcno) << 3))	/* Index of the FIFO where sent Data */
							/* packages are confirmed */
#define PFIFO_MASK(xcno)        (0x7f << (xcno*8))

#define FIFO_PTR_FRAMELEN_SHIFT 0
#define FIFO_PTR_FRAMELEN_MASK  (0x7ff << 0)
#define FIFO_PTR_FRAMELEN(len)  (((len) << 0) & FIFO_PTR_FRAMELEN_MASK)
#define FIFO_PTR_TIMETRIG       (1<<11)
#define FIFO_PTR_MULTI_REQ
#define FIFO_PTR_ORIGIN         (1<<14)
#define FIFO_PTR_VLAN           (1<<15)
#define FIFO_PTR_FRAMENO_SHIFT  16
#define FIFO_PTR_FRAMENO_MASK   (0x3f << 16)
#define FIFO_PTR_FRAMENO(no)    (((no) << 16) & FIFO_PTR_FRAMENO_MASK)
#define FIFO_PTR_SEGMENT_SHIFT  22
#define FIFO_PTR_SEGMENT_MASK   (0xf << 22)
#define FIFO_PTR_SEGMENT(seg)   (((seg) & 0xf) << 22)
#define FIFO_PTR_ERROR_SHIFT    28
#define FIFO_PTR_ERROR_MASK     (0xf << 28)

#define ISR_LINK_STATUS_CHANGE (1<<4)
#define ISR_IND_LO             (1<<3)
#define ISR_CON_LO             (1<<2)
#define ISR_IND_HI             (1<<1)
#define ISR_CON_HI             (1<<0)

#define ETH_MAC_LOCAL_CONFIG 0x1560
#define ETH_MAC_4321         0x1564
#define ETH_MAC_65           0x1568

#define MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT 16
#define MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK (0xf<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT)
#define MAC_TRAFFIC_CLASS_ARRANGEMENT(x) (((x)<<MAC_TRAFFIC_CLASS_ARRANGEMENT_SHIFT) & MAC_TRAFFIC_CLASS_ARRANGEMENT_MASK)
#define LOCAL_CONFIG_LINK_STATUS_IRQ_EN (1<<24)
#define LOCAL_CONFIG_CON_LO_IRQ_EN (1<<23)
#define LOCAL_CONFIG_CON_HI_IRQ_EN (1<<22)
#define LOCAL_CONFIG_IND_LO_IRQ_EN (1<<21)
#define LOCAL_CONFIG_IND_HI_IRQ_EN (1<<20)

#define CARDNAME "netx-eth"

/* LSB must be zero */
#define INTERNAL_PHY_ADR 0x1c

struct netx_eth_priv {
	void                    __iomem *sram_base, *xpec_base, *xmac_base;
	int                     id;
	struct mii_if_info      mii;
	u32                     msg_enable;
	struct xc               *xc;
	spinlock_t              lock;
};

static void netx_eth_set_multicast_list(struct net_device *ndev)
{
	/* implement me */
}

static int
netx_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
	struct netx_eth_priv *priv = netdev_priv(ndev);
	unsigned char *buf = skb->data;
	unsigned int len = skb->len;

	spin_lock_irq(&priv->lock);
	memcpy_toio(priv->sram_base + 1560, (void *)buf, len);
	if (len < 60) {
		memset_io(priv->sram_base + 1560 + len, 0, 60 - len);
		len = 60;
	}

	pfifo_push(REQ_FIFO_PORT_LO(priv->id),
	           FIFO_PTR_SEGMENT(priv->id) |
	           FIFO_PTR_FRAMENO(1) |
	           FIFO_PTR_FRAMELEN(len));

	ndev->stats.tx_packets++;
	ndev->stats.tx_bytes += skb->len;

	netif_stop_queue(ndev);
	spin_unlock_irq(&priv->lock);
	dev_kfree_skb(skb);

	return NETDEV_TX_OK;
}

static void netx_eth_receive(struct net_device *ndev)
{
	struct netx_eth_priv *priv = netdev_priv(ndev);
	unsigned int val, frameno, seg, len;
	unsigned char *data;
	struct sk_buff *skb;

	val = pfifo_pop(IND_FIFO_PORT_LO(priv->id));

	frameno = (val & FIFO_PTR_FRAMENO_MASK) >> FIFO_PTR_FRAMENO_SHIFT;
	seg = (val & FIFO_PTR_SEGMENT_MASK) >> FIFO_PTR_SEGMENT_SHIFT;
	len = (val & FIFO_PTR_FRAMELEN_MASK) >> FIFO_PTR_FRAMELEN_SHIFT;

	skb = netdev_alloc_skb(ndev, len);
	if (unlikely(skb == NULL)) {
		ndev->stats.rx_dropped++;
		return;
	}

	data = skb_put(skb, len);

	memcpy_fromio(data, priv->sram_base + frameno * 1560, len);

	pfifo_push(EMPTY_PTR_FIFO(priv->id),
		FIFO_PTR_SEGMENT(seg) | FIFO_PTR_FRAMENO(frameno));

	skb->protocol = eth_type_trans(skb, ndev);
	netif_rx(skb);
	ndev->stats.rx_packets++;
	ndev->stats.rx_bytes += len;
}

static irqreturn_t
netx_eth_interrupt(int irq, void *dev_id)
{
	struct net_device *ndev = dev_id;
	struct netx_eth_priv *priv = netdev_priv(ndev);
	int status;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);

	status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
	while (status) {
		int fill_level;
		writel(status, NETX_PFIFO_XPEC_ISR(priv->id));

		if ((status & ISR_CON_HI) || (status & ISR_IND_HI))
			printk("%s: unexpected status: 0x%08x\n",
			    __func__, status);

		fill_level =
		    readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));
		while (fill_level--)
			netx_eth_receive(ndev);

		if (status & ISR_CON_LO)
			netif_wake_queue(ndev);

		if (status & ISR_LINK_STATUS_CHANGE)
			mii_check_media(&priv->mii, netif_msg_link(priv), 1);

		status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
	}
	spin_unlock_irqrestore(&priv->lock, flags);
	return IRQ_HANDLED;
}

static int netx_eth_open(struct net_device *ndev)
{
	struct netx_eth_priv *priv = netdev_priv(ndev);

	if (request_irq
	    (ndev->irq, netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev))
		return -EAGAIN;

	writel(ndev->dev_addr[0] |
	       ndev->dev_addr[1]<<8 |
	       ndev->dev_addr[2]<<16 |
	       ndev->dev_addr[3]<<24,
	       priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
	writel(ndev->dev_addr[4] |
	       ndev->dev_addr[5]<<8,
	       priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);

	writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |
		LOCAL_CONFIG_CON_LO_IRQ_EN |
		LOCAL_CONFIG_CON_HI_IRQ_EN |
		LOCAL_CONFIG_IND_LO_IRQ_EN |
		LOCAL_CONFIG_IND_HI_IRQ_EN,
		priv->xpec_base + NETX_XPEC_RAM_START_OFS +
		ETH_MAC_LOCAL_CONFIG);

	mii_check_media(&priv->mii, netif_msg_link(priv), 1);
	netif_start_queue(ndev);

	return 0;
}

static int netx_eth_close(struct net_device *ndev)
{
	struct netx_eth_priv *priv = netdev_priv(ndev);

	netif_stop_queue(ndev);

	writel(0,
	    priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_LOCAL_CONFIG);

	free_irq(ndev->irq, ndev);

	return 0;
}

static void netx_eth_timeout(struct net_device *ndev)
{
	struct netx_eth_priv *priv = netdev_priv(ndev);
	int i;

	printk(KERN_ERR "%s: transmit timed out, resetting\n", ndev->name);

	spin_lock_irq(&priv->lock);

	xc_reset(priv->xc);
	xc_start(priv->xc);

	for (i=2; i<=18; i++)
		pfifo_push(EMPTY_PTR_FIFO(priv->id),
			FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));

	spin_unlock_irq(&priv->lock);

	netif_wake_queue(ndev);
}

static int
netx_eth_phy_read(struct net_device *ndev, int phy_id, int reg)
{
	unsigned int val;

	val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
	      MIIMU_REGADDR(reg) | MIIMU_PHY_NRES;

	writel(val, NETX_MIIMU);
	while (readl(NETX_MIIMU) & MIIMU_SNRDY);

	return readl(NETX_MIIMU) >> 16;

}

static void
netx_eth_phy_write(struct net_device *ndev, int phy_id, int reg, int value)
{
	unsigned int val;

	val = MIIMU_SNRDY | MIIMU_PREAMBLE | MIIMU_PHYADDR(phy_id) |
	      MIIMU_REGADDR(reg) | MIIMU_PHY_NRES | MIIMU_OPMODE_WRITE |
	      MIIMU_DATA(value);

	writel(val, NETX_MIIMU);
	while (readl(NETX_MIIMU) & MIIMU_SNRDY);
}

static const struct net_device_ops netx_eth_netdev_ops = {
	.ndo_open		= netx_eth_open,
	.ndo_stop		= netx_eth_close,
	.ndo_start_xmit		= netx_eth_hard_start_xmit,
	.ndo_tx_timeout		= netx_eth_timeout,
	.ndo_set_rx_mode	= netx_eth_set_multicast_list,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= eth_mac_addr,
};

static int netx_eth_enable(struct net_device *ndev)
{
	struct netx_eth_priv *priv = netdev_priv(ndev);
	unsigned int mac4321, mac65;
	int running, i, ret;
	bool inv_mac_addr = false;

	ndev->netdev_ops = &netx_eth_netdev_ops;
	ndev->watchdog_timeo = msecs_to_jiffies(5000);

	priv->msg_enable       = NETIF_MSG_LINK;
	priv->mii.phy_id_mask  = 0x1f;
	priv->mii.reg_num_mask = 0x1f;
	priv->mii.force_media  = 0;
	priv->mii.full_duplex  = 0;
	priv->mii.dev	     = ndev;
	priv->mii.mdio_read    = netx_eth_phy_read;
	priv->mii.mdio_write   = netx_eth_phy_write;
	priv->mii.phy_id = INTERNAL_PHY_ADR + priv->id;

	running = xc_running(priv->xc);
	xc_stop(priv->xc);

	/* if the xc engine is already running, assume the bootloader has
	 * loaded the firmware for us
	 */
	if (running) {
		/* get Node Address from hardware */
		mac4321 = readl(priv->xpec_base +
			NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
		mac65 = readl(priv->xpec_base +
			NETX_XPEC_RAM_START_OFS + ETH_MAC_65);

		ndev->dev_addr[0] = mac4321 & 0xff;
		ndev->dev_addr[1] = (mac4321 >> 8) & 0xff;
		ndev->dev_addr[2] = (mac4321 >> 16) & 0xff;
		ndev->dev_addr[3] = (mac4321 >> 24) & 0xff;
		ndev->dev_addr[4] = mac65 & 0xff;
		ndev->dev_addr[5] = (mac65 >> 8) & 0xff;
	} else {
		if (xc_request_firmware(priv->xc)) {
			printk(CARDNAME ": requesting firmware failed\n");
			return -ENODEV;
		}
	}

	xc_reset(priv->xc);
	xc_start(priv->xc);

	if (!is_valid_ether_addr(ndev->dev_addr))
		inv_mac_addr = true;

	for (i=2; i<=18; i++)
		pfifo_push(EMPTY_PTR_FIFO(priv->id),
			FIFO_PTR_FRAMENO(i) | FIFO_PTR_SEGMENT(priv->id));

	ret = register_netdev(ndev);
	if (inv_mac_addr)
		printk("%s: Invalid ethernet MAC address. Please set using ip\n",
		       ndev->name);

	return ret;
}

static int netx_eth_drv_probe(struct platform_device *pdev)
{
	struct netx_eth_priv *priv;
	struct net_device *ndev;
	struct netxeth_platform_data *pdata;
	int ret;

	ndev = alloc_etherdev(sizeof (struct netx_eth_priv));
	if (!ndev) {
		ret = -ENOMEM;
		goto exit;
	}
	SET_NETDEV_DEV(ndev, &pdev->dev);

	platform_set_drvdata(pdev, ndev);

	priv = netdev_priv(ndev);

	pdata = dev_get_platdata(&pdev->dev);
	priv->xc = request_xc(pdata->xcno, &pdev->dev);
	if (!priv->xc) {
		dev_err(&pdev->dev, "unable to request xc engine\n");
		ret = -ENODEV;
		goto exit_free_netdev;
	}

	ndev->irq = priv->xc->irq;
	priv->id = pdev->id;
	priv->xpec_base = priv->xc->xpec_base;
	priv->xmac_base = priv->xc->xmac_base;
	priv->sram_base = priv->xc->sram_base;

	spin_lock_init(&priv->lock);

	ret = pfifo_request(PFIFO_MASK(priv->id));
	if (ret) {
		printk("unable to request PFIFO\n");
		goto exit_free_xc;
	}

	ret = netx_eth_enable(ndev);
	if (ret)
		goto exit_free_pfifo;

	return 0;
exit_free_pfifo:
	pfifo_free(PFIFO_MASK(priv->id));
exit_free_xc:
	free_xc(priv->xc);
exit_free_netdev:
	free_netdev(ndev);
exit:
	return ret;
}

static int netx_eth_drv_remove(struct platform_device *pdev)
{
	struct net_device *ndev = platform_get_drvdata(pdev);
	struct netx_eth_priv *priv = netdev_priv(ndev);

	unregister_netdev(ndev);
	xc_stop(priv->xc);
	free_xc(priv->xc);
	free_netdev(ndev);
	pfifo_free(PFIFO_MASK(priv->id));

	return 0;
}

static int netx_eth_drv_suspend(struct platform_device *pdev, pm_message_t state)
{
	dev_err(&pdev->dev, "suspend not implemented\n");
	return 0;
}

static int netx_eth_drv_resume(struct platform_device *pdev)
{
	dev_err(&pdev->dev, "resume not implemented\n");
	return 0;
}

static struct platform_driver netx_eth_driver = {
	.probe		= netx_eth_drv_probe,
	.remove		= netx_eth_drv_remove,
	.suspend	= netx_eth_drv_suspend,
	.resume		= netx_eth_drv_resume,
	.driver		= {
		.name	= CARDNAME,
	},
};

static int __init netx_eth_init(void)
{
	unsigned int phy_control, val;

	printk("NetX Ethernet driver\n");

	phy_control = PHY_CONTROL_PHY_ADDRESS(INTERNAL_PHY_ADR>>1) |
		      PHY_CONTROL_PHY1_MODE(PHY_MODE_ALL) |
		      PHY_CONTROL_PHY1_AUTOMDIX |
		      PHY_CONTROL_PHY1_EN |
		      PHY_CONTROL_PHY0_MODE(PHY_MODE_ALL) |
		      PHY_CONTROL_PHY0_AUTOMDIX |
		      PHY_CONTROL_PHY0_EN |
		      PHY_CONTROL_CLK_XLATIN;

	val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
	writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);

	writel(phy_control | PHY_CONTROL_RESET, NETX_SYSTEM_PHY_CONTROL);
	udelay(100);

	val = readl(NETX_SYSTEM_IOC_ACCESS_KEY);
	writel(val, NETX_SYSTEM_IOC_ACCESS_KEY);

	writel(phy_control, NETX_SYSTEM_PHY_CONTROL);

	return platform_driver_register(&netx_eth_driver);
}

static void __exit netx_eth_cleanup(void)
{
	platform_driver_unregister(&netx_eth_driver);
}

module_init(netx_eth_init);
module_exit(netx_eth_cleanup);

MODULE_AUTHOR("Sascha Hauer, Pengutronix");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" CARDNAME);
MODULE_FIRMWARE("xc0.bin");
MODULE_FIRMWARE("xc1.bin");
MODULE_FIRMWARE("xc2.bin");