aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/ftmac100.c
blob: c08889c4b1114a02321ffcb6ea5c05d8089ac4f0 (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
// SPDX-License-Identifier: GPL-2.0+
/*
 * Faraday FTMAC100 Ethernet
 *
 * (C) Copyright 2009 Faraday Technology
 * Po-Yu Chuang <ratbert@faraday-tech.com>
 */

#include <config.h>
#include <common.h>
#include <malloc.h>
#include <net.h>
#include <linux/io.h>

#include "ftmac100.h"
#ifdef CONFIG_DM_ETH
#include <dm.h>
DECLARE_GLOBAL_DATA_PTR;
#endif
#define ETH_ZLEN	60

struct ftmac100_data {
	struct ftmac100_txdes txdes[1];
	struct ftmac100_rxdes rxdes[PKTBUFSRX];
	int rx_index;
	const char *name;
	phys_addr_t iobase;
};

/*
 * Reset MAC
 */
static void ftmac100_reset(struct ftmac100_data *priv)
{
	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;

	debug ("%s()\n", __func__);

	writel (FTMAC100_MACCR_SW_RST, &ftmac100->maccr);

	while (readl (&ftmac100->maccr) & FTMAC100_MACCR_SW_RST)
		mdelay(1);
	/*
	 * When soft reset complete, write mac address immediately maybe fail somehow
	 *  Wait for a while can avoid this problem
	 */
	mdelay(1);
}

/*
 * Set MAC address
 */
static void ftmac100_set_mac(struct ftmac100_data *priv ,
	const unsigned char *mac)
{
	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
	unsigned int maddr = mac[0] << 8 | mac[1];
	unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];

	debug ("%s(%x %x)\n", __func__, maddr, laddr);

	writel (maddr, &ftmac100->mac_madr);
	writel (laddr, &ftmac100->mac_ladr);
}

/*
 * Disable MAC
 */
static void _ftmac100_halt(struct ftmac100_data *priv)
{
	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
	debug ("%s()\n", __func__);
	writel (0, &ftmac100->maccr);
}

/*
 * Initialize MAC
 */
static int _ftmac100_init(struct ftmac100_data *priv, unsigned char enetaddr[6])
{
	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
	struct ftmac100_txdes *txdes = priv->txdes;
	struct ftmac100_rxdes *rxdes = priv->rxdes;
	unsigned int maccr;
	int i;
	debug ("%s()\n", __func__);

	ftmac100_reset(priv);

	/* set the ethernet address */
	ftmac100_set_mac(priv, enetaddr);


	/* disable all interrupts */

	writel (0, &ftmac100->imr);

	/* initialize descriptors */

	priv->rx_index = 0;

	txdes[0].txdes1			= FTMAC100_TXDES1_EDOTR;
	rxdes[PKTBUFSRX - 1].rxdes1	= FTMAC100_RXDES1_EDORR;

	for (i = 0; i < PKTBUFSRX; i++) {
		/* RXBUF_BADR */
		rxdes[i].rxdes2 = (unsigned int)(unsigned long)net_rx_packets[i];
		rxdes[i].rxdes1 |= FTMAC100_RXDES1_RXBUF_SIZE (PKTSIZE_ALIGN);
		rxdes[i].rxdes0 = FTMAC100_RXDES0_RXDMA_OWN;
	}

	/* transmit ring */

	writel ((unsigned long)txdes, &ftmac100->txr_badr);

	/* receive ring */

	writel ((unsigned long)rxdes, &ftmac100->rxr_badr);

	/* poll receive descriptor automatically */

	writel (FTMAC100_APTC_RXPOLL_CNT (1), &ftmac100->aptc);

	/* enable transmitter, receiver */

	maccr = FTMAC100_MACCR_XMT_EN |
		FTMAC100_MACCR_RCV_EN |
		FTMAC100_MACCR_XDMA_EN |
		FTMAC100_MACCR_RDMA_EN |
		FTMAC100_MACCR_CRC_APD |
		FTMAC100_MACCR_ENRX_IN_HALFTX |
		FTMAC100_MACCR_RX_RUNT |
		FTMAC100_MACCR_RX_BROADPKT;

	writel (maccr, &ftmac100->maccr);

	return 0;
}

/*
 * Free receiving buffer
 */
static int _ftmac100_free_pkt(struct ftmac100_data *priv)
{
	struct ftmac100_rxdes *curr_des;
	curr_des = &priv->rxdes[priv->rx_index];
	/* release buffer to DMA */
	curr_des->rxdes0 |= FTMAC100_RXDES0_RXDMA_OWN;
	priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
	return 0;
}

/*
 * Receive a data block via Ethernet
 */
static int __ftmac100_recv(struct ftmac100_data *priv)
{
	struct ftmac100_rxdes *curr_des;
	unsigned short rxlen;

	curr_des = &priv->rxdes[priv->rx_index];
	if (curr_des->rxdes0 & FTMAC100_RXDES0_RXDMA_OWN)
		return 0;

	if (curr_des->rxdes0 & (FTMAC100_RXDES0_RX_ERR |
				FTMAC100_RXDES0_CRC_ERR |
				FTMAC100_RXDES0_FTL |
				FTMAC100_RXDES0_RUNT |
				FTMAC100_RXDES0_RX_ODD_NB)) {
		return 0;
	}

	rxlen = FTMAC100_RXDES0_RFL (curr_des->rxdes0);
	invalidate_dcache_range(curr_des->rxdes2,curr_des->rxdes2+rxlen);
	debug ("%s(): RX buffer %d, %x received\n",
	       __func__, priv->rx_index, rxlen);

	return rxlen;
}

/*
 * Send a data block via Ethernet
 */
static int _ftmac100_send(struct ftmac100_data *priv, void *packet, int length)
{
	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
	struct ftmac100_txdes *curr_des = priv->txdes;
	ulong start;

	if (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
		debug ("%s(): no TX descriptor available\n", __func__);
		return -1;
	}

	debug ("%s(%lx, %x)\n", __func__, (unsigned long)packet, length);

	length = (length < ETH_ZLEN) ? ETH_ZLEN : length;

	/* initiate a transmit sequence */

	flush_dcache_range((unsigned long)packet,(unsigned long)packet+length);
	curr_des->txdes2 = (unsigned int)(unsigned long)packet;	/* TXBUF_BADR */

	curr_des->txdes1 &= FTMAC100_TXDES1_EDOTR;
	curr_des->txdes1 |= FTMAC100_TXDES1_FTS |
			    FTMAC100_TXDES1_LTS |
			    FTMAC100_TXDES1_TXBUF_SIZE (length);

	curr_des->txdes0 = FTMAC100_TXDES0_TXDMA_OWN;

	/* start transmit */

	writel (1, &ftmac100->txpd);

	/* wait for transfer to succeed */

	start = get_timer(0);
	while (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
		if (get_timer(start) >= 5) {
			debug ("%s(): timed out\n", __func__);
			return -1;
		}
	}

	debug ("%s(): packet sent\n", __func__);

	return 0;
}

#ifndef CONFIG_DM_ETH
/*
 * disable transmitter, receiver
 */
static void ftmac100_halt(struct eth_device *dev)
{
	struct ftmac100_data *priv = dev->priv;
	return _ftmac100_halt(priv);
}

static int ftmac100_init(struct eth_device *dev, bd_t *bd)
{
	struct ftmac100_data *priv = dev->priv;
	return _ftmac100_init(priv , dev->enetaddr);
}

static int _ftmac100_recv(struct ftmac100_data *priv)
{
	struct ftmac100_rxdes *curr_des;
	unsigned short len;
	curr_des = &priv->rxdes[priv->rx_index];
	len = __ftmac100_recv(priv);
	if (len) {
		/* pass the packet up to the protocol layers. */
		net_process_received_packet((void *)curr_des->rxdes2, len);
		_ftmac100_free_pkt(priv);
	}
	return len ? 1 : 0;
}

/*
 * Get a data block via Ethernet
 */
static int ftmac100_recv(struct eth_device *dev)
{
	struct ftmac100_data *priv = dev->priv;
	return _ftmac100_recv(priv);
}

/*
 * Send a data block via Ethernet
 */
static int ftmac100_send(struct eth_device *dev, void *packet, int length)
{
	struct ftmac100_data *priv = dev->priv;
	return _ftmac100_send(priv , packet , length);
}

int ftmac100_initialize (bd_t *bd)
{
	struct eth_device *dev;
	struct ftmac100_data *priv;
	dev = malloc (sizeof *dev);
	if (!dev) {
		printf ("%s(): failed to allocate dev\n", __func__);
		goto out;
	}
	/* Transmit and receive descriptors should align to 16 bytes */
	priv = memalign (16, sizeof (struct ftmac100_data));
	if (!priv) {
		printf ("%s(): failed to allocate priv\n", __func__);
		goto free_dev;
	}
	memset (dev, 0, sizeof (*dev));
	memset (priv, 0, sizeof (*priv));

	strcpy(dev->name, "FTMAC100");
	dev->iobase	= CONFIG_FTMAC100_BASE;
	dev->init	= ftmac100_init;
	dev->halt	= ftmac100_halt;
	dev->send	= ftmac100_send;
	dev->recv	= ftmac100_recv;
	dev->priv	= priv;
	priv->iobase	= dev->iobase;
	eth_register (dev);

	return 1;

free_dev:
	free (dev);
out:
	return 0;
}
#endif

#ifdef CONFIG_DM_ETH
static int ftmac100_start(struct udevice *dev)
{
	struct eth_pdata *plat = dev_get_platdata(dev);
	struct ftmac100_data *priv = dev_get_priv(dev);

	return _ftmac100_init(priv, plat->enetaddr);
}

static void ftmac100_stop(struct udevice *dev)
{
	struct ftmac100_data *priv = dev_get_priv(dev);
	_ftmac100_halt(priv);
}

static int ftmac100_send(struct udevice *dev, void *packet, int length)
{
	struct ftmac100_data *priv = dev_get_priv(dev);
	int ret;
	ret = _ftmac100_send(priv , packet , length);
	return ret ? 0 : -ETIMEDOUT;
}

static int ftmac100_recv(struct udevice *dev, int flags, uchar **packetp)
{
	struct ftmac100_data *priv = dev_get_priv(dev);
	struct ftmac100_rxdes *curr_des;
	curr_des = &priv->rxdes[priv->rx_index];
	int len;
	len = __ftmac100_recv(priv);
	if (len)
		*packetp = (uchar *)(unsigned long)curr_des->rxdes2;

	return len ? len : -EAGAIN;
}

static int ftmac100_free_pkt(struct udevice *dev, uchar *packet, int length)
{
	struct ftmac100_data *priv = dev_get_priv(dev);
	_ftmac100_free_pkt(priv);
	return 0;
}

int ftmac100_read_rom_hwaddr(struct udevice *dev)
{
	struct eth_pdata *pdata = dev_get_platdata(dev);
	eth_env_get_enetaddr("ethaddr", pdata->enetaddr);
	return 0;
}

static const char *dtbmacaddr(u32 ifno)
{
	int node, len;
	char enet[16];
	const char *mac;
	const char *path;
	if (gd->fdt_blob == NULL) {
		printf("%s: don't have a valid gd->fdt_blob!\n", __func__);
		return NULL;
	}
	node = fdt_path_offset(gd->fdt_blob, "/aliases");
	if (node < 0)
		return NULL;

	sprintf(enet, "ethernet%d", ifno);
	path = fdt_getprop(gd->fdt_blob, node, enet, NULL);
	if (!path) {
		printf("no alias for %s\n", enet);
		return NULL;
	}
	node = fdt_path_offset(gd->fdt_blob, path);
	mac = fdt_getprop(gd->fdt_blob, node, "mac-address", &len);
	if (mac && is_valid_ethaddr((u8 *)mac))
		return mac;

	return NULL;
}

static int ftmac100_ofdata_to_platdata(struct udevice *dev)
{
	struct ftmac100_data *priv = dev_get_priv(dev);
	struct eth_pdata *pdata = dev_get_platdata(dev);
	const char *mac;
	pdata->iobase = devfdt_get_addr(dev);
	priv->iobase = pdata->iobase;
	mac = dtbmacaddr(0);
	if (mac)
		memcpy(pdata->enetaddr , mac , 6);

	return 0;
}

static int ftmac100_probe(struct udevice *dev)
{
	struct ftmac100_data *priv = dev_get_priv(dev);
	priv->name = dev->name;
	return 0;
}

static int ftmac100_bind(struct udevice *dev)
{
	return device_set_name(dev, dev->name);
}

static const struct eth_ops ftmac100_ops = {
	.start	= ftmac100_start,
	.send	= ftmac100_send,
	.recv	= ftmac100_recv,
	.stop	= ftmac100_stop,
	.free_pkt = ftmac100_free_pkt,
};

static const struct udevice_id ftmac100_ids[] = {
	{ .compatible = "andestech,atmac100" },
	{ }
};

U_BOOT_DRIVER(ftmac100) = {
	.name	= "nds32_mac",
	.id	= UCLASS_ETH,
	.of_match = ftmac100_ids,
	.bind	= ftmac100_bind,
	.ofdata_to_platdata = ftmac100_ofdata_to_platdata,
	.probe	= ftmac100_probe,
	.ops	= &ftmac100_ops,
	.priv_auto_alloc_size = sizeof(struct ftmac100_data),
	.platdata_auto_alloc_size = sizeof(struct eth_pdata),
	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
};
#endif