xref: /openbmc/u-boot/drivers/net/ftmac100.c (revision bb839ad9)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Faraday FTMAC100 Ethernet
4  *
5  * (C) Copyright 2009 Faraday Technology
6  * Po-Yu Chuang <ratbert@faraday-tech.com>
7  */
8 
9 #include <config.h>
10 #include <common.h>
11 #include <malloc.h>
12 #include <net.h>
13 #include <linux/io.h>
14 
15 #include "ftmac100.h"
16 #ifdef CONFIG_DM_ETH
17 #include <dm.h>
18 DECLARE_GLOBAL_DATA_PTR;
19 #endif
20 #define ETH_ZLEN	60
21 
22 struct ftmac100_data {
23 	struct ftmac100_txdes txdes[1];
24 	struct ftmac100_rxdes rxdes[PKTBUFSRX];
25 	int rx_index;
26 	const char *name;
27 	phys_addr_t iobase;
28 };
29 
30 /*
31  * Reset MAC
32  */
33 static void ftmac100_reset(struct ftmac100_data *priv)
34 {
35 	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
36 
37 	debug ("%s()\n", __func__);
38 
39 	writel (FTMAC100_MACCR_SW_RST, &ftmac100->maccr);
40 
41 	while (readl (&ftmac100->maccr) & FTMAC100_MACCR_SW_RST)
42 		mdelay(1);
43 	/*
44 	 * When soft reset complete, write mac address immediately maybe fail somehow
45 	 *  Wait for a while can avoid this problem
46 	 */
47 	mdelay(1);
48 }
49 
50 /*
51  * Set MAC address
52  */
53 static void ftmac100_set_mac(struct ftmac100_data *priv ,
54 	const unsigned char *mac)
55 {
56 	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
57 	unsigned int maddr = mac[0] << 8 | mac[1];
58 	unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
59 
60 	debug ("%s(%x %x)\n", __func__, maddr, laddr);
61 
62 	writel (maddr, &ftmac100->mac_madr);
63 	writel (laddr, &ftmac100->mac_ladr);
64 }
65 
66 /*
67  * Disable MAC
68  */
69 static void _ftmac100_halt(struct ftmac100_data *priv)
70 {
71 	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
72 	debug ("%s()\n", __func__);
73 	writel (0, &ftmac100->maccr);
74 }
75 
76 /*
77  * Initialize MAC
78  */
79 static int _ftmac100_init(struct ftmac100_data *priv, unsigned char enetaddr[6])
80 {
81 	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
82 	struct ftmac100_txdes *txdes = priv->txdes;
83 	struct ftmac100_rxdes *rxdes = priv->rxdes;
84 	unsigned int maccr;
85 	int i;
86 	debug ("%s()\n", __func__);
87 
88 	ftmac100_reset(priv);
89 
90 	/* set the ethernet address */
91 	ftmac100_set_mac(priv, enetaddr);
92 
93 
94 	/* disable all interrupts */
95 
96 	writel (0, &ftmac100->imr);
97 
98 	/* initialize descriptors */
99 
100 	priv->rx_index = 0;
101 
102 	txdes[0].txdes1			= FTMAC100_TXDES1_EDOTR;
103 	rxdes[PKTBUFSRX - 1].rxdes1	= FTMAC100_RXDES1_EDORR;
104 
105 	for (i = 0; i < PKTBUFSRX; i++) {
106 		/* RXBUF_BADR */
107 		rxdes[i].rxdes2 = (unsigned int)(unsigned long)net_rx_packets[i];
108 		rxdes[i].rxdes1 |= FTMAC100_RXDES1_RXBUF_SIZE (PKTSIZE_ALIGN);
109 		rxdes[i].rxdes0 = FTMAC100_RXDES0_RXDMA_OWN;
110 	}
111 
112 	/* transmit ring */
113 
114 	writel ((unsigned long)txdes, &ftmac100->txr_badr);
115 
116 	/* receive ring */
117 
118 	writel ((unsigned long)rxdes, &ftmac100->rxr_badr);
119 
120 	/* poll receive descriptor automatically */
121 
122 	writel (FTMAC100_APTC_RXPOLL_CNT (1), &ftmac100->aptc);
123 
124 	/* enable transmitter, receiver */
125 
126 	maccr = FTMAC100_MACCR_XMT_EN |
127 		FTMAC100_MACCR_RCV_EN |
128 		FTMAC100_MACCR_XDMA_EN |
129 		FTMAC100_MACCR_RDMA_EN |
130 		FTMAC100_MACCR_CRC_APD |
131 		FTMAC100_MACCR_ENRX_IN_HALFTX |
132 		FTMAC100_MACCR_RX_RUNT |
133 		FTMAC100_MACCR_RX_BROADPKT;
134 
135 	writel (maccr, &ftmac100->maccr);
136 
137 	return 0;
138 }
139 
140 /*
141  * Free receiving buffer
142  */
143 static int _ftmac100_free_pkt(struct ftmac100_data *priv)
144 {
145 	struct ftmac100_rxdes *curr_des;
146 	curr_des = &priv->rxdes[priv->rx_index];
147 	/* release buffer to DMA */
148 	curr_des->rxdes0 |= FTMAC100_RXDES0_RXDMA_OWN;
149 	priv->rx_index = (priv->rx_index + 1) % PKTBUFSRX;
150 	return 0;
151 }
152 
153 /*
154  * Receive a data block via Ethernet
155  */
156 static int __ftmac100_recv(struct ftmac100_data *priv)
157 {
158 	struct ftmac100_rxdes *curr_des;
159 	unsigned short rxlen;
160 
161 	curr_des = &priv->rxdes[priv->rx_index];
162 	if (curr_des->rxdes0 & FTMAC100_RXDES0_RXDMA_OWN)
163 		return 0;
164 
165 	if (curr_des->rxdes0 & (FTMAC100_RXDES0_RX_ERR |
166 				FTMAC100_RXDES0_CRC_ERR |
167 				FTMAC100_RXDES0_FTL |
168 				FTMAC100_RXDES0_RUNT |
169 				FTMAC100_RXDES0_RX_ODD_NB)) {
170 		return 0;
171 	}
172 
173 	rxlen = FTMAC100_RXDES0_RFL (curr_des->rxdes0);
174 	invalidate_dcache_range(curr_des->rxdes2,curr_des->rxdes2+rxlen);
175 	debug ("%s(): RX buffer %d, %x received\n",
176 	       __func__, priv->rx_index, rxlen);
177 
178 	return rxlen;
179 }
180 
181 /*
182  * Send a data block via Ethernet
183  */
184 static int _ftmac100_send(struct ftmac100_data *priv, void *packet, int length)
185 {
186 	struct ftmac100 *ftmac100 = (struct ftmac100 *)priv->iobase;
187 	struct ftmac100_txdes *curr_des = priv->txdes;
188 	ulong start;
189 
190 	if (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
191 		debug ("%s(): no TX descriptor available\n", __func__);
192 		return -1;
193 	}
194 
195 	debug ("%s(%lx, %x)\n", __func__, (unsigned long)packet, length);
196 
197 	length = (length < ETH_ZLEN) ? ETH_ZLEN : length;
198 
199 	/* initiate a transmit sequence */
200 
201 	flush_dcache_range((unsigned long)packet,(unsigned long)packet+length);
202 	curr_des->txdes2 = (unsigned int)(unsigned long)packet;	/* TXBUF_BADR */
203 
204 	curr_des->txdes1 &= FTMAC100_TXDES1_EDOTR;
205 	curr_des->txdes1 |= FTMAC100_TXDES1_FTS |
206 			    FTMAC100_TXDES1_LTS |
207 			    FTMAC100_TXDES1_TXBUF_SIZE (length);
208 
209 	curr_des->txdes0 = FTMAC100_TXDES0_TXDMA_OWN;
210 
211 	/* start transmit */
212 
213 	writel (1, &ftmac100->txpd);
214 
215 	/* wait for transfer to succeed */
216 
217 	start = get_timer(0);
218 	while (curr_des->txdes0 & FTMAC100_TXDES0_TXDMA_OWN) {
219 		if (get_timer(start) >= 5) {
220 			debug ("%s(): timed out\n", __func__);
221 			return -1;
222 		}
223 	}
224 
225 	debug ("%s(): packet sent\n", __func__);
226 
227 	return 0;
228 }
229 
230 #ifndef CONFIG_DM_ETH
231 /*
232  * disable transmitter, receiver
233  */
234 static void ftmac100_halt(struct eth_device *dev)
235 {
236 	struct ftmac100_data *priv = dev->priv;
237 	return _ftmac100_halt(priv);
238 }
239 
240 static int ftmac100_init(struct eth_device *dev, bd_t *bd)
241 {
242 	struct ftmac100_data *priv = dev->priv;
243 	return _ftmac100_init(priv , dev->enetaddr);
244 }
245 
246 static int _ftmac100_recv(struct ftmac100_data *priv)
247 {
248 	struct ftmac100_rxdes *curr_des;
249 	unsigned short len;
250 	curr_des = &priv->rxdes[priv->rx_index];
251 	len = __ftmac100_recv(priv);
252 	if (len) {
253 		/* pass the packet up to the protocol layers. */
254 		net_process_received_packet((void *)curr_des->rxdes2, len);
255 		_ftmac100_free_pkt(priv);
256 	}
257 	return len ? 1 : 0;
258 }
259 
260 /*
261  * Get a data block via Ethernet
262  */
263 static int ftmac100_recv(struct eth_device *dev)
264 {
265 	struct ftmac100_data *priv = dev->priv;
266 	return _ftmac100_recv(priv);
267 }
268 
269 /*
270  * Send a data block via Ethernet
271  */
272 static int ftmac100_send(struct eth_device *dev, void *packet, int length)
273 {
274 	struct ftmac100_data *priv = dev->priv;
275 	return _ftmac100_send(priv , packet , length);
276 }
277 
278 int ftmac100_initialize (bd_t *bd)
279 {
280 	struct eth_device *dev;
281 	struct ftmac100_data *priv;
282 	dev = malloc (sizeof *dev);
283 	if (!dev) {
284 		printf ("%s(): failed to allocate dev\n", __func__);
285 		goto out;
286 	}
287 	/* Transmit and receive descriptors should align to 16 bytes */
288 	priv = memalign (16, sizeof (struct ftmac100_data));
289 	if (!priv) {
290 		printf ("%s(): failed to allocate priv\n", __func__);
291 		goto free_dev;
292 	}
293 	memset (dev, 0, sizeof (*dev));
294 	memset (priv, 0, sizeof (*priv));
295 
296 	strcpy(dev->name, "FTMAC100");
297 	dev->iobase	= CONFIG_FTMAC100_BASE;
298 	dev->init	= ftmac100_init;
299 	dev->halt	= ftmac100_halt;
300 	dev->send	= ftmac100_send;
301 	dev->recv	= ftmac100_recv;
302 	dev->priv	= priv;
303 	priv->iobase	= dev->iobase;
304 	eth_register (dev);
305 
306 	return 1;
307 
308 free_dev:
309 	free (dev);
310 out:
311 	return 0;
312 }
313 #endif
314 
315 #ifdef CONFIG_DM_ETH
316 static int ftmac100_start(struct udevice *dev)
317 {
318 	struct eth_pdata *plat = dev_get_platdata(dev);
319 	struct ftmac100_data *priv = dev_get_priv(dev);
320 
321 	return _ftmac100_init(priv, plat->enetaddr);
322 }
323 
324 static void ftmac100_stop(struct udevice *dev)
325 {
326 	struct ftmac100_data *priv = dev_get_priv(dev);
327 	_ftmac100_halt(priv);
328 }
329 
330 static int ftmac100_send(struct udevice *dev, void *packet, int length)
331 {
332 	struct ftmac100_data *priv = dev_get_priv(dev);
333 	int ret;
334 	ret = _ftmac100_send(priv , packet , length);
335 	return ret ? 0 : -ETIMEDOUT;
336 }
337 
338 static int ftmac100_recv(struct udevice *dev, int flags, uchar **packetp)
339 {
340 	struct ftmac100_data *priv = dev_get_priv(dev);
341 	struct ftmac100_rxdes *curr_des;
342 	curr_des = &priv->rxdes[priv->rx_index];
343 	int len;
344 	len = __ftmac100_recv(priv);
345 	if (len)
346 		*packetp = (uchar *)(unsigned long)curr_des->rxdes2;
347 
348 	return len ? len : -EAGAIN;
349 }
350 
351 static int ftmac100_free_pkt(struct udevice *dev, uchar *packet, int length)
352 {
353 	struct ftmac100_data *priv = dev_get_priv(dev);
354 	_ftmac100_free_pkt(priv);
355 	return 0;
356 }
357 
358 int ftmac100_read_rom_hwaddr(struct udevice *dev)
359 {
360 	struct eth_pdata *pdata = dev_get_platdata(dev);
361 	eth_env_get_enetaddr("ethaddr", pdata->enetaddr);
362 	return 0;
363 }
364 
365 static const char *dtbmacaddr(u32 ifno)
366 {
367 	int node, len;
368 	char enet[16];
369 	const char *mac;
370 	const char *path;
371 	if (gd->fdt_blob == NULL) {
372 		printf("%s: don't have a valid gd->fdt_blob!\n", __func__);
373 		return NULL;
374 	}
375 	node = fdt_path_offset(gd->fdt_blob, "/aliases");
376 	if (node < 0)
377 		return NULL;
378 
379 	sprintf(enet, "ethernet%d", ifno);
380 	path = fdt_getprop(gd->fdt_blob, node, enet, NULL);
381 	if (!path) {
382 		printf("no alias for %s\n", enet);
383 		return NULL;
384 	}
385 	node = fdt_path_offset(gd->fdt_blob, path);
386 	mac = fdt_getprop(gd->fdt_blob, node, "mac-address", &len);
387 	if (mac && is_valid_ethaddr((u8 *)mac))
388 		return mac;
389 
390 	return NULL;
391 }
392 
393 static int ftmac100_ofdata_to_platdata(struct udevice *dev)
394 {
395 	struct ftmac100_data *priv = dev_get_priv(dev);
396 	struct eth_pdata *pdata = dev_get_platdata(dev);
397 	const char *mac;
398 	pdata->iobase = devfdt_get_addr(dev);
399 	priv->iobase = pdata->iobase;
400 	mac = dtbmacaddr(0);
401 	if (mac)
402 		memcpy(pdata->enetaddr , mac , 6);
403 
404 	return 0;
405 }
406 
407 static int ftmac100_probe(struct udevice *dev)
408 {
409 	struct ftmac100_data *priv = dev_get_priv(dev);
410 	priv->name = dev->name;
411 	return 0;
412 }
413 
414 static int ftmac100_bind(struct udevice *dev)
415 {
416 	return device_set_name(dev, dev->name);
417 }
418 
419 static const struct eth_ops ftmac100_ops = {
420 	.start	= ftmac100_start,
421 	.send	= ftmac100_send,
422 	.recv	= ftmac100_recv,
423 	.stop	= ftmac100_stop,
424 	.free_pkt = ftmac100_free_pkt,
425 };
426 
427 static const struct udevice_id ftmac100_ids[] = {
428 	{ .compatible = "andestech,atmac100" },
429 	{ }
430 };
431 
432 U_BOOT_DRIVER(ftmac100) = {
433 	.name	= "nds32_mac",
434 	.id	= UCLASS_ETH,
435 	.of_match = ftmac100_ids,
436 	.bind	= ftmac100_bind,
437 	.ofdata_to_platdata = ftmac100_ofdata_to_platdata,
438 	.probe	= ftmac100_probe,
439 	.ops	= &ftmac100_ops,
440 	.priv_auto_alloc_size = sizeof(struct ftmac100_data),
441 	.platdata_auto_alloc_size = sizeof(struct eth_pdata),
442 	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
443 };
444 #endif
445