2 * Copyright (C) 2005-2006 Atmel Corporation
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.
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.
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
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
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.
31 * Therefore, define CONFIG_SYS_RX_ETH_BUFFER to 1 in the board-specific
32 * configuration header. This way, the core allocates one RX buffer
33 * and one TX buffer, each of which can hold a ethernet packet of
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...
47 #include <linux/mii.h>
49 #include <asm/dma-mapping.h>
50 #include <asm/arch/clk.h>
54 #define CONFIG_SYS_MACB_RX_BUFFER_SIZE 4096
55 #define CONFIG_SYS_MACB_RX_RING_SIZE (CONFIG_SYS_MACB_RX_BUFFER_SIZE / 128)
56 #define CONFIG_SYS_MACB_TX_RING_SIZE 16
57 #define CONFIG_SYS_MACB_TX_TIMEOUT 1000
58 #define CONFIG_SYS_MACB_AUTONEG_TIMEOUT 5000000
60 struct macb_dma_desc {
65 #define RXADDR_USED 0x00000001
66 #define RXADDR_WRAP 0x00000002
68 #define RXBUF_FRMLEN_MASK 0x00000fff
69 #define RXBUF_FRAME_START 0x00004000
70 #define RXBUF_FRAME_END 0x00008000
71 #define RXBUF_TYPEID_MATCH 0x00400000
72 #define RXBUF_ADDR4_MATCH 0x00800000
73 #define RXBUF_ADDR3_MATCH 0x01000000
74 #define RXBUF_ADDR2_MATCH 0x02000000
75 #define RXBUF_ADDR1_MATCH 0x04000000
76 #define RXBUF_BROADCAST 0x80000000
78 #define TXBUF_FRMLEN_MASK 0x000007ff
79 #define TXBUF_FRAME_END 0x00008000
80 #define TXBUF_NOCRC 0x00010000
81 #define TXBUF_EXHAUSTED 0x08000000
82 #define TXBUF_UNDERRUN 0x10000000
83 #define TXBUF_MAXRETRY 0x20000000
84 #define TXBUF_WRAP 0x40000000
85 #define TXBUF_USED 0x80000000
96 struct macb_dma_desc *rx_ring;
97 struct macb_dma_desc *tx_ring;
99 unsigned long rx_buffer_dma;
100 unsigned long rx_ring_dma;
101 unsigned long tx_ring_dma;
103 const struct device *dev;
104 struct eth_device netdev;
105 unsigned short phy_addr;
107 #define to_macb(_nd) container_of(_nd, struct macb_device, netdev)
109 static void macb_mdio_write(struct macb_device *macb, u8 reg, u16 value)
111 unsigned long netctl;
112 unsigned long netstat;
115 netctl = macb_readl(macb, NCR);
116 netctl |= MACB_BIT(MPE);
117 macb_writel(macb, NCR, netctl);
119 frame = (MACB_BF(SOF, 1)
121 | MACB_BF(PHYA, macb->phy_addr)
124 | MACB_BF(DATA, value));
125 macb_writel(macb, MAN, frame);
128 netstat = macb_readl(macb, NSR);
129 } while (!(netstat & MACB_BIT(IDLE)));
131 netctl = macb_readl(macb, NCR);
132 netctl &= ~MACB_BIT(MPE);
133 macb_writel(macb, NCR, netctl);
136 static u16 macb_mdio_read(struct macb_device *macb, u8 reg)
138 unsigned long netctl;
139 unsigned long netstat;
142 netctl = macb_readl(macb, NCR);
143 netctl |= MACB_BIT(MPE);
144 macb_writel(macb, NCR, netctl);
146 frame = (MACB_BF(SOF, 1)
148 | MACB_BF(PHYA, macb->phy_addr)
151 macb_writel(macb, MAN, frame);
154 netstat = macb_readl(macb, NSR);
155 } while (!(netstat & MACB_BIT(IDLE)));
157 frame = macb_readl(macb, MAN);
159 netctl = macb_readl(macb, NCR);
160 netctl &= ~MACB_BIT(MPE);
161 macb_writel(macb, NCR, netctl);
163 return MACB_BFEXT(DATA, frame);
166 void __weak arch_get_mdio_control(const char *name)
171 #if defined(CONFIG_CMD_MII)
173 int macb_miiphy_read(const char *devname, u8 phy_adr, u8 reg, u16 *value)
175 struct eth_device *dev = eth_get_dev_by_name(devname);
176 struct macb_device *macb = to_macb(dev);
178 if ( macb->phy_addr != phy_adr )
181 arch_get_mdio_control(devname);
182 *value = macb_mdio_read(macb, reg);
187 int macb_miiphy_write(const char *devname, u8 phy_adr, u8 reg, u16 value)
189 struct eth_device *dev = eth_get_dev_by_name(devname);
190 struct macb_device *macb = to_macb(dev);
192 if ( macb->phy_addr != phy_adr )
195 arch_get_mdio_control(devname);
196 macb_mdio_write(macb, reg, value);
203 #if defined(CONFIG_CMD_NET)
205 static int macb_send(struct eth_device *netdev, void *packet, int length)
207 struct macb_device *macb = to_macb(netdev);
208 unsigned long paddr, ctrl;
209 unsigned int tx_head = macb->tx_head;
212 paddr = dma_map_single(packet, length, DMA_TO_DEVICE);
214 ctrl = length & TXBUF_FRMLEN_MASK;
215 ctrl |= TXBUF_FRAME_END;
216 if (tx_head == (CONFIG_SYS_MACB_TX_RING_SIZE - 1)) {
222 macb->tx_ring[tx_head].ctrl = ctrl;
223 macb->tx_ring[tx_head].addr = paddr;
225 macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART));
228 * I guess this is necessary because the networking core may
229 * re-use the transmit buffer as soon as we return...
231 for (i = 0; i <= CONFIG_SYS_MACB_TX_TIMEOUT; i++) {
233 ctrl = macb->tx_ring[tx_head].ctrl;
234 if (ctrl & TXBUF_USED)
239 dma_unmap_single(packet, length, paddr);
241 if (i <= CONFIG_SYS_MACB_TX_TIMEOUT) {
242 if (ctrl & TXBUF_UNDERRUN)
243 printf("%s: TX underrun\n", netdev->name);
244 if (ctrl & TXBUF_EXHAUSTED)
245 printf("%s: TX buffers exhausted in mid frame\n",
248 printf("%s: TX timeout\n", netdev->name);
251 /* No one cares anyway */
255 static void reclaim_rx_buffers(struct macb_device *macb,
256 unsigned int new_tail)
261 while (i > new_tail) {
262 macb->rx_ring[i].addr &= ~RXADDR_USED;
264 if (i > CONFIG_SYS_MACB_RX_RING_SIZE)
268 while (i < new_tail) {
269 macb->rx_ring[i].addr &= ~RXADDR_USED;
274 macb->rx_tail = new_tail;
277 static int macb_recv(struct eth_device *netdev)
279 struct macb_device *macb = to_macb(netdev);
280 unsigned int rx_tail = macb->rx_tail;
287 if (!(macb->rx_ring[rx_tail].addr & RXADDR_USED))
290 status = macb->rx_ring[rx_tail].ctrl;
291 if (status & RXBUF_FRAME_START) {
292 if (rx_tail != macb->rx_tail)
293 reclaim_rx_buffers(macb, rx_tail);
297 if (status & RXBUF_FRAME_END) {
298 buffer = macb->rx_buffer + 128 * macb->rx_tail;
299 length = status & RXBUF_FRMLEN_MASK;
301 unsigned int headlen, taillen;
303 headlen = 128 * (CONFIG_SYS_MACB_RX_RING_SIZE
305 taillen = length - headlen;
306 memcpy((void *)NetRxPackets[0],
308 memcpy((void *)NetRxPackets[0] + headlen,
309 macb->rx_buffer, taillen);
310 buffer = (void *)NetRxPackets[0];
313 NetReceive(buffer, length);
314 if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE)
316 reclaim_rx_buffers(macb, rx_tail);
318 if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE) {
329 static void macb_phy_reset(struct macb_device *macb)
331 struct eth_device *netdev = &macb->netdev;
335 adv = ADVERTISE_CSMA | ADVERTISE_ALL;
336 macb_mdio_write(macb, MII_ADVERTISE, adv);
337 printf("%s: Starting autonegotiation...\n", netdev->name);
338 macb_mdio_write(macb, MII_BMCR, (BMCR_ANENABLE
341 for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) {
342 status = macb_mdio_read(macb, MII_BMSR);
343 if (status & BMSR_ANEGCOMPLETE)
348 if (status & BMSR_ANEGCOMPLETE)
349 printf("%s: Autonegotiation complete\n", netdev->name);
351 printf("%s: Autonegotiation timed out (status=0x%04x)\n",
352 netdev->name, status);
355 #ifdef CONFIG_MACB_SEARCH_PHY
356 static int macb_phy_find(struct macb_device *macb)
361 /* Search for PHY... */
362 for (i = 0; i < 32; i++) {
364 phy_id = macb_mdio_read(macb, MII_PHYSID1);
365 if (phy_id != 0xffff) {
366 printf("%s: PHY present at %d\n", macb->netdev.name, i);
371 /* PHY isn't up to snuff */
372 printf("%s: PHY not found\n", macb->netdev.name);
376 #endif /* CONFIG_MACB_SEARCH_PHY */
379 static int macb_phy_init(struct macb_device *macb)
381 struct eth_device *netdev = &macb->netdev;
383 u16 phy_id, status, adv, lpa;
384 int media, speed, duplex;
387 arch_get_mdio_control(netdev->name);
388 #ifdef CONFIG_MACB_SEARCH_PHY
389 /* Auto-detect phy_addr */
390 if (!macb_phy_find(macb)) {
393 #endif /* CONFIG_MACB_SEARCH_PHY */
395 /* Check if the PHY is up to snuff... */
396 phy_id = macb_mdio_read(macb, MII_PHYSID1);
397 if (phy_id == 0xffff) {
398 printf("%s: No PHY present\n", netdev->name);
402 status = macb_mdio_read(macb, MII_BMSR);
403 if (!(status & BMSR_LSTATUS)) {
404 /* Try to re-negotiate if we don't have link already. */
405 macb_phy_reset(macb);
407 for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) {
408 status = macb_mdio_read(macb, MII_BMSR);
409 if (status & BMSR_LSTATUS)
415 if (!(status & BMSR_LSTATUS)) {
416 printf("%s: link down (status: 0x%04x)\n",
417 netdev->name, status);
420 adv = macb_mdio_read(macb, MII_ADVERTISE);
421 lpa = macb_mdio_read(macb, MII_LPA);
422 media = mii_nway_result(lpa & adv);
423 speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
425 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
426 printf("%s: link up, %sMbps %s-duplex (lpa: 0x%04x)\n",
428 speed ? "100" : "10",
429 duplex ? "full" : "half",
432 ncfgr = macb_readl(macb, NCFGR);
433 ncfgr &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
435 ncfgr |= MACB_BIT(SPD);
437 ncfgr |= MACB_BIT(FD);
438 macb_writel(macb, NCFGR, ncfgr);
443 static int macb_init(struct eth_device *netdev, bd_t *bd)
445 struct macb_device *macb = to_macb(netdev);
450 * macb_halt should have been called at some point before now,
451 * so we'll assume the controller is idle.
454 /* initialize DMA descriptors */
455 paddr = macb->rx_buffer_dma;
456 for (i = 0; i < CONFIG_SYS_MACB_RX_RING_SIZE; i++) {
457 if (i == (CONFIG_SYS_MACB_RX_RING_SIZE - 1))
458 paddr |= RXADDR_WRAP;
459 macb->rx_ring[i].addr = paddr;
460 macb->rx_ring[i].ctrl = 0;
463 for (i = 0; i < CONFIG_SYS_MACB_TX_RING_SIZE; i++) {
464 macb->tx_ring[i].addr = 0;
465 if (i == (CONFIG_SYS_MACB_TX_RING_SIZE - 1))
466 macb->tx_ring[i].ctrl = TXBUF_USED | TXBUF_WRAP;
468 macb->tx_ring[i].ctrl = TXBUF_USED;
470 macb->rx_tail = macb->tx_head = macb->tx_tail = 0;
472 macb_writel(macb, RBQP, macb->rx_ring_dma);
473 macb_writel(macb, TBQP, macb->tx_ring_dma);
475 /* choose RMII or MII mode. This depends on the board */
477 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
478 defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
479 defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
480 defined(CONFIG_AT91SAM9XE) || defined(CONFIG_AT91SAM9X5)
481 macb_writel(macb, USRIO, MACB_BIT(RMII) | MACB_BIT(CLKEN));
483 macb_writel(macb, USRIO, 0);
486 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
487 defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
488 defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
489 defined(CONFIG_AT91SAM9XE) || defined(CONFIG_AT91SAM9X5)
490 macb_writel(macb, USRIO, MACB_BIT(CLKEN));
492 macb_writel(macb, USRIO, MACB_BIT(MII));
494 #endif /* CONFIG_RMII */
496 if (!macb_phy_init(macb))
499 /* Enable TX and RX */
500 macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE));
505 static void macb_halt(struct eth_device *netdev)
507 struct macb_device *macb = to_macb(netdev);
510 /* Halt the controller and wait for any ongoing transmission to end. */
511 ncr = macb_readl(macb, NCR);
512 ncr |= MACB_BIT(THALT);
513 macb_writel(macb, NCR, ncr);
516 tsr = macb_readl(macb, TSR);
517 } while (tsr & MACB_BIT(TGO));
519 /* Disable TX and RX, and clear statistics */
520 macb_writel(macb, NCR, MACB_BIT(CLRSTAT));
523 static int macb_write_hwaddr(struct eth_device *dev)
525 struct macb_device *macb = to_macb(dev);
529 /* set hardware address */
530 hwaddr_bottom = dev->enetaddr[0] | dev->enetaddr[1] << 8 |
531 dev->enetaddr[2] << 16 | dev->enetaddr[3] << 24;
532 macb_writel(macb, SA1B, hwaddr_bottom);
533 hwaddr_top = dev->enetaddr[4] | dev->enetaddr[5] << 8;
534 macb_writel(macb, SA1T, hwaddr_top);
538 int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
540 struct macb_device *macb;
541 struct eth_device *netdev;
542 unsigned long macb_hz;
545 macb = malloc(sizeof(struct macb_device));
547 printf("Error: Failed to allocate memory for MACB%d\n", id);
550 memset(macb, 0, sizeof(struct macb_device));
552 netdev = &macb->netdev;
554 macb->rx_buffer = dma_alloc_coherent(CONFIG_SYS_MACB_RX_BUFFER_SIZE,
555 &macb->rx_buffer_dma);
556 macb->rx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_RX_RING_SIZE
557 * sizeof(struct macb_dma_desc),
559 macb->tx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_TX_RING_SIZE
560 * sizeof(struct macb_dma_desc),
564 macb->phy_addr = phy_addr;
566 sprintf(netdev->name, "macb%d", id);
567 netdev->init = macb_init;
568 netdev->halt = macb_halt;
569 netdev->send = macb_send;
570 netdev->recv = macb_recv;
571 netdev->write_hwaddr = macb_write_hwaddr;
574 * Do some basic initialization so that we at least can talk
577 macb_hz = get_macb_pclk_rate(id);
578 if (macb_hz < 20000000)
579 ncfgr = MACB_BF(CLK, MACB_CLK_DIV8);
580 else if (macb_hz < 40000000)
581 ncfgr = MACB_BF(CLK, MACB_CLK_DIV16);
582 else if (macb_hz < 80000000)
583 ncfgr = MACB_BF(CLK, MACB_CLK_DIV32);
585 ncfgr = MACB_BF(CLK, MACB_CLK_DIV64);
587 macb_writel(macb, NCFGR, ncfgr);
589 eth_register(netdev);
591 #if defined(CONFIG_CMD_MII)
592 miiphy_register(netdev->name, macb_miiphy_read, macb_miiphy_write);