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Haavard Skinnemoen51c8f242006-01-20 10:03:34 +01001/*
2 * Copyright (C) 2005-2006 Atmel Corporation
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18#include <common.h>
19
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +010020/*
21 * The u-boot networking stack is a little weird. It seems like the
22 * networking core allocates receive buffers up front without any
23 * regard to the hardware that's supposed to actually receive those
24 * packets.
25 *
26 * The MACB receives packets into 128-byte receive buffers, so the
27 * buffers allocated by the core isn't very practical to use. We'll
28 * allocate our own, but we need one such buffer in case a packet
29 * wraps around the DMA ring so that we have to copy it.
30 *
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +020031 * Therefore, define CONFIG_SYS_RX_ETH_BUFFER to 1 in the board-specific
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +010032 * configuration header. This way, the core allocates one RX buffer
33 * and one TX buffer, each of which can hold a ethernet packet of
34 * maximum size.
35 *
36 * For some reason, the networking core unconditionally specifies a
37 * 32-byte packet "alignment" (which really should be called
38 * "padding"). MACB shouldn't need that, but we'll refrain from any
39 * core modifications here...
40 */
41
42#include <net.h>
Ben Warren2f2b6b62008-08-31 22:22:04 -070043#include <netdev.h>
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +010044#include <malloc.h>
Semih Hazar790088e2009-12-17 15:07:15 +020045#include <miiphy.h>
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +010046
47#include <linux/mii.h>
48#include <asm/io.h>
49#include <asm/dma-mapping.h>
50#include <asm/arch/clk.h>
51
52#include "macb.h"
53
Haavard Skinnemoen996e1472007-05-02 13:22:38 +020054#define barrier() asm volatile("" ::: "memory")
55
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +020056#define CONFIG_SYS_MACB_RX_BUFFER_SIZE 4096
57#define CONFIG_SYS_MACB_RX_RING_SIZE (CONFIG_SYS_MACB_RX_BUFFER_SIZE / 128)
58#define CONFIG_SYS_MACB_TX_RING_SIZE 16
59#define CONFIG_SYS_MACB_TX_TIMEOUT 1000
60#define CONFIG_SYS_MACB_AUTONEG_TIMEOUT 5000000
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +010061
62struct macb_dma_desc {
63 u32 addr;
64 u32 ctrl;
65};
66
67#define RXADDR_USED 0x00000001
68#define RXADDR_WRAP 0x00000002
69
70#define RXBUF_FRMLEN_MASK 0x00000fff
71#define RXBUF_FRAME_START 0x00004000
72#define RXBUF_FRAME_END 0x00008000
73#define RXBUF_TYPEID_MATCH 0x00400000
74#define RXBUF_ADDR4_MATCH 0x00800000
75#define RXBUF_ADDR3_MATCH 0x01000000
76#define RXBUF_ADDR2_MATCH 0x02000000
77#define RXBUF_ADDR1_MATCH 0x04000000
78#define RXBUF_BROADCAST 0x80000000
79
80#define TXBUF_FRMLEN_MASK 0x000007ff
81#define TXBUF_FRAME_END 0x00008000
82#define TXBUF_NOCRC 0x00010000
83#define TXBUF_EXHAUSTED 0x08000000
84#define TXBUF_UNDERRUN 0x10000000
85#define TXBUF_MAXRETRY 0x20000000
86#define TXBUF_WRAP 0x40000000
87#define TXBUF_USED 0x80000000
88
89struct macb_device {
90 void *regs;
91
92 unsigned int rx_tail;
93 unsigned int tx_head;
94 unsigned int tx_tail;
95
96 void *rx_buffer;
97 void *tx_buffer;
98 struct macb_dma_desc *rx_ring;
99 struct macb_dma_desc *tx_ring;
100
101 unsigned long rx_buffer_dma;
102 unsigned long rx_ring_dma;
103 unsigned long tx_ring_dma;
104
105 const struct device *dev;
106 struct eth_device netdev;
107 unsigned short phy_addr;
108};
109#define to_macb(_nd) container_of(_nd, struct macb_device, netdev)
110
111static void macb_mdio_write(struct macb_device *macb, u8 reg, u16 value)
112{
113 unsigned long netctl;
114 unsigned long netstat;
115 unsigned long frame;
116
117 netctl = macb_readl(macb, NCR);
118 netctl |= MACB_BIT(MPE);
119 macb_writel(macb, NCR, netctl);
120
121 frame = (MACB_BF(SOF, 1)
122 | MACB_BF(RW, 1)
123 | MACB_BF(PHYA, macb->phy_addr)
124 | MACB_BF(REGA, reg)
125 | MACB_BF(CODE, 2)
126 | MACB_BF(DATA, value));
127 macb_writel(macb, MAN, frame);
128
129 do {
130 netstat = macb_readl(macb, NSR);
131 } while (!(netstat & MACB_BIT(IDLE)));
132
133 netctl = macb_readl(macb, NCR);
134 netctl &= ~MACB_BIT(MPE);
135 macb_writel(macb, NCR, netctl);
136}
137
138static u16 macb_mdio_read(struct macb_device *macb, u8 reg)
139{
140 unsigned long netctl;
141 unsigned long netstat;
142 unsigned long frame;
143
144 netctl = macb_readl(macb, NCR);
145 netctl |= MACB_BIT(MPE);
146 macb_writel(macb, NCR, netctl);
147
148 frame = (MACB_BF(SOF, 1)
149 | MACB_BF(RW, 2)
150 | MACB_BF(PHYA, macb->phy_addr)
151 | MACB_BF(REGA, reg)
152 | MACB_BF(CODE, 2));
153 macb_writel(macb, MAN, frame);
154
155 do {
156 netstat = macb_readl(macb, NSR);
157 } while (!(netstat & MACB_BIT(IDLE)));
158
159 frame = macb_readl(macb, MAN);
160
161 netctl = macb_readl(macb, NCR);
162 netctl &= ~MACB_BIT(MPE);
163 macb_writel(macb, NCR, netctl);
164
165 return MACB_BFEXT(DATA, frame);
166}
167
Semih Hazar790088e2009-12-17 15:07:15 +0200168#if defined(CONFIG_CMD_MII)
169
170int macb_miiphy_read(char *devname, u8 phy_adr, u8 reg, u16 *value)
171{
172 struct eth_device *dev = eth_get_dev_by_name(devname);
173 struct macb_device *macb = to_macb(dev);
174
175 if ( macb->phy_addr != phy_adr )
176 return -1;
177
178 *value = macb_mdio_read(macb, reg);
179
180 return 0;
181}
182
183int macb_miiphy_write(char *devname, u8 phy_adr, u8 reg, u16 value)
184{
185 struct eth_device *dev = eth_get_dev_by_name(devname);
186 struct macb_device *macb = to_macb(dev);
187
188 if ( macb->phy_addr != phy_adr )
189 return -1;
190
191 macb_mdio_write(macb, reg, value);
192
193 return 0;
194}
195#endif
196
197
Jon Loeligerb1d408a2007-07-09 17:30:01 -0500198#if defined(CONFIG_CMD_NET)
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100199
200static int macb_send(struct eth_device *netdev, volatile void *packet,
201 int length)
202{
203 struct macb_device *macb = to_macb(netdev);
204 unsigned long paddr, ctrl;
205 unsigned int tx_head = macb->tx_head;
206 int i;
207
208 paddr = dma_map_single(packet, length, DMA_TO_DEVICE);
209
210 ctrl = length & TXBUF_FRMLEN_MASK;
211 ctrl |= TXBUF_FRAME_END;
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200212 if (tx_head == (CONFIG_SYS_MACB_TX_RING_SIZE - 1)) {
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100213 ctrl |= TXBUF_WRAP;
214 macb->tx_head = 0;
215 } else
216 macb->tx_head++;
217
218 macb->tx_ring[tx_head].ctrl = ctrl;
219 macb->tx_ring[tx_head].addr = paddr;
Haavard Skinnemoen996e1472007-05-02 13:22:38 +0200220 barrier();
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100221 macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART));
222
223 /*
224 * I guess this is necessary because the networking core may
225 * re-use the transmit buffer as soon as we return...
226 */
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200227 for (i = 0; i <= CONFIG_SYS_MACB_TX_TIMEOUT; i++) {
Haavard Skinnemoen996e1472007-05-02 13:22:38 +0200228 barrier();
229 ctrl = macb->tx_ring[tx_head].ctrl;
230 if (ctrl & TXBUF_USED)
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100231 break;
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100232 udelay(1);
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100233 }
234
235 dma_unmap_single(packet, length, paddr);
236
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200237 if (i <= CONFIG_SYS_MACB_TX_TIMEOUT) {
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100238 if (ctrl & TXBUF_UNDERRUN)
239 printf("%s: TX underrun\n", netdev->name);
240 if (ctrl & TXBUF_EXHAUSTED)
241 printf("%s: TX buffers exhausted in mid frame\n",
242 netdev->name);
Haavard Skinnemoen996e1472007-05-02 13:22:38 +0200243 } else {
244 printf("%s: TX timeout\n", netdev->name);
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100245 }
246
247 /* No one cares anyway */
248 return 0;
249}
250
251static void reclaim_rx_buffers(struct macb_device *macb,
252 unsigned int new_tail)
253{
254 unsigned int i;
255
256 i = macb->rx_tail;
257 while (i > new_tail) {
258 macb->rx_ring[i].addr &= ~RXADDR_USED;
259 i++;
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200260 if (i > CONFIG_SYS_MACB_RX_RING_SIZE)
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100261 i = 0;
262 }
263
264 while (i < new_tail) {
265 macb->rx_ring[i].addr &= ~RXADDR_USED;
266 i++;
267 }
268
Haavard Skinnemoen996e1472007-05-02 13:22:38 +0200269 barrier();
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100270 macb->rx_tail = new_tail;
271}
272
273static int macb_recv(struct eth_device *netdev)
274{
275 struct macb_device *macb = to_macb(netdev);
276 unsigned int rx_tail = macb->rx_tail;
277 void *buffer;
278 int length;
279 int wrapped = 0;
280 u32 status;
281
282 for (;;) {
283 if (!(macb->rx_ring[rx_tail].addr & RXADDR_USED))
284 return -1;
285
286 status = macb->rx_ring[rx_tail].ctrl;
287 if (status & RXBUF_FRAME_START) {
288 if (rx_tail != macb->rx_tail)
289 reclaim_rx_buffers(macb, rx_tail);
290 wrapped = 0;
291 }
292
293 if (status & RXBUF_FRAME_END) {
294 buffer = macb->rx_buffer + 128 * macb->rx_tail;
295 length = status & RXBUF_FRMLEN_MASK;
296 if (wrapped) {
297 unsigned int headlen, taillen;
298
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200299 headlen = 128 * (CONFIG_SYS_MACB_RX_RING_SIZE
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100300 - macb->rx_tail);
301 taillen = length - headlen;
302 memcpy((void *)NetRxPackets[0],
303 buffer, headlen);
304 memcpy((void *)NetRxPackets[0] + headlen,
305 macb->rx_buffer, taillen);
306 buffer = (void *)NetRxPackets[0];
307 }
308
309 NetReceive(buffer, length);
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200310 if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE)
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100311 rx_tail = 0;
312 reclaim_rx_buffers(macb, rx_tail);
313 } else {
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200314 if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE) {
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100315 wrapped = 1;
316 rx_tail = 0;
317 }
318 }
Haavard Skinnemoen996e1472007-05-02 13:22:38 +0200319 barrier();
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100320 }
321
322 return 0;
323}
324
Haavard Skinnemoenb3ad7722007-05-02 13:31:53 +0200325static void macb_phy_reset(struct macb_device *macb)
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100326{
327 struct eth_device *netdev = &macb->netdev;
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100328 int i;
Haavard Skinnemoenb3ad7722007-05-02 13:31:53 +0200329 u16 status, adv;
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100330
331 adv = ADVERTISE_CSMA | ADVERTISE_ALL;
332 macb_mdio_write(macb, MII_ADVERTISE, adv);
333 printf("%s: Starting autonegotiation...\n", netdev->name);
334 macb_mdio_write(macb, MII_BMCR, (BMCR_ANENABLE
335 | BMCR_ANRESTART));
336
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200337 for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) {
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100338 status = macb_mdio_read(macb, MII_BMSR);
339 if (status & BMSR_ANEGCOMPLETE)
340 break;
341 udelay(100);
342 }
343
344 if (status & BMSR_ANEGCOMPLETE)
345 printf("%s: Autonegotiation complete\n", netdev->name);
346 else
347 printf("%s: Autonegotiation timed out (status=0x%04x)\n",
348 netdev->name, status);
Haavard Skinnemoenb3ad7722007-05-02 13:31:53 +0200349}
350
Gunnar Rangoy6dd74f32009-01-23 12:56:31 +0100351#ifdef CONFIG_MACB_SEARCH_PHY
352static int macb_phy_find(struct macb_device *macb)
353{
354 int i;
355 u16 phy_id;
356
357 /* Search for PHY... */
358 for (i = 0; i < 32; i++) {
359 macb->phy_addr = i;
360 phy_id = macb_mdio_read(macb, MII_PHYSID1);
361 if (phy_id != 0xffff) {
362 printf("%s: PHY present at %d\n", macb->netdev.name, i);
363 return 1;
364 }
365 }
366
367 /* PHY isn't up to snuff */
368 printf("%s: PHY not found", macb->netdev.name);
369
370 return 0;
371}
372#endif /* CONFIG_MACB_SEARCH_PHY */
373
374
Haavard Skinnemoenb3ad7722007-05-02 13:31:53 +0200375static int macb_phy_init(struct macb_device *macb)
376{
377 struct eth_device *netdev = &macb->netdev;
378 u32 ncfgr;
379 u16 phy_id, status, adv, lpa;
380 int media, speed, duplex;
381 int i;
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100382
Gunnar Rangoy6dd74f32009-01-23 12:56:31 +0100383#ifdef CONFIG_MACB_SEARCH_PHY
384 /* Auto-detect phy_addr */
385 if (!macb_phy_find(macb)) {
386 return 0;
387 }
388#endif /* CONFIG_MACB_SEARCH_PHY */
389
Haavard Skinnemoenb3ad7722007-05-02 13:31:53 +0200390 /* Check if the PHY is up to snuff... */
391 phy_id = macb_mdio_read(macb, MII_PHYSID1);
392 if (phy_id == 0xffff) {
393 printf("%s: No PHY present\n", netdev->name);
394 return 0;
395 }
396
397 status = macb_mdio_read(macb, MII_BMSR);
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100398 if (!(status & BMSR_LSTATUS)) {
Haavard Skinnemoenb3ad7722007-05-02 13:31:53 +0200399 /* Try to re-negotiate if we don't have link already. */
400 macb_phy_reset(macb);
401
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200402 for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) {
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100403 status = macb_mdio_read(macb, MII_BMSR);
404 if (status & BMSR_LSTATUS)
405 break;
Haavard Skinnemoenb3ad7722007-05-02 13:31:53 +0200406 udelay(100);
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100407 }
408 }
409
410 if (!(status & BMSR_LSTATUS)) {
411 printf("%s: link down (status: 0x%04x)\n",
412 netdev->name, status);
413 return 0;
414 } else {
Haavard Skinnemoenb3ad7722007-05-02 13:31:53 +0200415 adv = macb_mdio_read(macb, MII_ADVERTISE);
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100416 lpa = macb_mdio_read(macb, MII_LPA);
417 media = mii_nway_result(lpa & adv);
418 speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
419 ? 1 : 0);
420 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
421 printf("%s: link up, %sMbps %s-duplex (lpa: 0x%04x)\n",
422 netdev->name,
423 speed ? "100" : "10",
424 duplex ? "full" : "half",
425 lpa);
426
427 ncfgr = macb_readl(macb, NCFGR);
428 ncfgr &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
429 if (speed)
430 ncfgr |= MACB_BIT(SPD);
431 if (duplex)
432 ncfgr |= MACB_BIT(FD);
433 macb_writel(macb, NCFGR, ncfgr);
434 return 1;
435 }
436}
437
438static int macb_init(struct eth_device *netdev, bd_t *bd)
439{
440 struct macb_device *macb = to_macb(netdev);
441 unsigned long paddr;
442 u32 hwaddr_bottom;
443 u16 hwaddr_top;
444 int i;
445
446 /*
447 * macb_halt should have been called at some point before now,
448 * so we'll assume the controller is idle.
449 */
450
451 /* initialize DMA descriptors */
452 paddr = macb->rx_buffer_dma;
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200453 for (i = 0; i < CONFIG_SYS_MACB_RX_RING_SIZE; i++) {
454 if (i == (CONFIG_SYS_MACB_RX_RING_SIZE - 1))
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100455 paddr |= RXADDR_WRAP;
456 macb->rx_ring[i].addr = paddr;
457 macb->rx_ring[i].ctrl = 0;
458 paddr += 128;
459 }
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200460 for (i = 0; i < CONFIG_SYS_MACB_TX_RING_SIZE; i++) {
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100461 macb->tx_ring[i].addr = 0;
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200462 if (i == (CONFIG_SYS_MACB_TX_RING_SIZE - 1))
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100463 macb->tx_ring[i].ctrl = TXBUF_USED | TXBUF_WRAP;
464 else
465 macb->tx_ring[i].ctrl = TXBUF_USED;
466 }
467 macb->rx_tail = macb->tx_head = macb->tx_tail = 0;
468
469 macb_writel(macb, RBQP, macb->rx_ring_dma);
470 macb_writel(macb, TBQP, macb->tx_ring_dma);
471
472 /* set hardware address */
473 hwaddr_bottom = cpu_to_le32(*((u32 *)netdev->enetaddr));
474 macb_writel(macb, SA1B, hwaddr_bottom);
475 hwaddr_top = cpu_to_le16(*((u16 *)(netdev->enetaddr + 4)));
476 macb_writel(macb, SA1T, hwaddr_top);
477
478 /* choose RMII or MII mode. This depends on the board */
479#ifdef CONFIG_RMII
Stelian Pop69c925f2008-05-08 18:52:23 +0200480#if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
Sedji Gaouaou538566d2009-07-09 10:16:29 +0200481 defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
482 defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45)
Stelian Pop87a82542008-01-03 21:15:56 +0000483 macb_writel(macb, USRIO, MACB_BIT(RMII) | MACB_BIT(CLKEN));
484#else
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100485 macb_writel(macb, USRIO, 0);
Stelian Pop87a82542008-01-03 21:15:56 +0000486#endif
487#else
Stelian Pop69c925f2008-05-08 18:52:23 +0200488#if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
Sedji Gaouaou538566d2009-07-09 10:16:29 +0200489 defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
490 defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45)
Stelian Pop87a82542008-01-03 21:15:56 +0000491 macb_writel(macb, USRIO, MACB_BIT(CLKEN));
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100492#else
493 macb_writel(macb, USRIO, MACB_BIT(MII));
494#endif
Stelian Pop87a82542008-01-03 21:15:56 +0000495#endif /* CONFIG_RMII */
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100496
497 if (!macb_phy_init(macb))
Ben Warrende9fcb52008-01-09 18:15:53 -0500498 return -1;
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100499
500 /* Enable TX and RX */
501 macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE));
502
Ben Warrende9fcb52008-01-09 18:15:53 -0500503 return 0;
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100504}
505
506static void macb_halt(struct eth_device *netdev)
507{
508 struct macb_device *macb = to_macb(netdev);
509 u32 ncr, tsr;
510
511 /* Halt the controller and wait for any ongoing transmission to end. */
512 ncr = macb_readl(macb, NCR);
513 ncr |= MACB_BIT(THALT);
514 macb_writel(macb, NCR, ncr);
515
516 do {
517 tsr = macb_readl(macb, TSR);
518 } while (tsr & MACB_BIT(TGO));
519
520 /* Disable TX and RX, and clear statistics */
521 macb_writel(macb, NCR, MACB_BIT(CLRSTAT));
522}
523
524int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
525{
526 struct macb_device *macb;
527 struct eth_device *netdev;
528 unsigned long macb_hz;
529 u32 ncfgr;
530
531 macb = malloc(sizeof(struct macb_device));
532 if (!macb) {
533 printf("Error: Failed to allocate memory for MACB%d\n", id);
534 return -1;
535 }
536 memset(macb, 0, sizeof(struct macb_device));
537
538 netdev = &macb->netdev;
539
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200540 macb->rx_buffer = dma_alloc_coherent(CONFIG_SYS_MACB_RX_BUFFER_SIZE,
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100541 &macb->rx_buffer_dma);
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200542 macb->rx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_RX_RING_SIZE
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100543 * sizeof(struct macb_dma_desc),
544 &macb->rx_ring_dma);
Jean-Christophe PLAGNIOL-VILLARD03836942008-10-16 15:01:15 +0200545 macb->tx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_TX_RING_SIZE
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100546 * sizeof(struct macb_dma_desc),
547 &macb->tx_ring_dma);
548
549 macb->regs = regs;
550 macb->phy_addr = phy_addr;
551
552 sprintf(netdev->name, "macb%d", id);
553 netdev->init = macb_init;
554 netdev->halt = macb_halt;
555 netdev->send = macb_send;
556 netdev->recv = macb_recv;
557
558 /*
559 * Do some basic initialization so that we at least can talk
560 * to the PHY
561 */
562 macb_hz = get_macb_pclk_rate(id);
563 if (macb_hz < 20000000)
564 ncfgr = MACB_BF(CLK, MACB_CLK_DIV8);
565 else if (macb_hz < 40000000)
566 ncfgr = MACB_BF(CLK, MACB_CLK_DIV16);
567 else if (macb_hz < 80000000)
568 ncfgr = MACB_BF(CLK, MACB_CLK_DIV32);
569 else
570 ncfgr = MACB_BF(CLK, MACB_CLK_DIV64);
571
572 macb_writel(macb, NCFGR, ncfgr);
573
574 eth_register(netdev);
575
Jon Loeligerb1d408a2007-07-09 17:30:01 -0500576#if defined(CONFIG_CMD_MII)
Semih Hazar790088e2009-12-17 15:07:15 +0200577 miiphy_register(netdev->name, macb_miiphy_read, macb_miiphy_write);
578#endif
Haavard Skinnemoen51c8f242006-01-20 10:03:34 +0100579 return 0;
580}
581
Jon Loeligerb1d408a2007-07-09 17:30:01 -0500582#endif