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 #if defined(CONFIG_CMD_MII)
168 int macb_miiphy_read(const char *devname, u8 phy_adr, u8 reg, u16 *value)
170 struct eth_device *dev = eth_get_dev_by_name(devname);
171 struct macb_device *macb = to_macb(dev);
173 if ( macb->phy_addr != phy_adr )
176 *value = macb_mdio_read(macb, reg);
181 int macb_miiphy_write(const char *devname, u8 phy_adr, u8 reg, u16 value)
183 struct eth_device *dev = eth_get_dev_by_name(devname);
184 struct macb_device *macb = to_macb(dev);
186 if ( macb->phy_addr != phy_adr )
189 macb_mdio_write(macb, reg, value);
196 #if defined(CONFIG_CMD_NET)
198 static int macb_send(struct eth_device *netdev, void *packet, int length)
200 struct macb_device *macb = to_macb(netdev);
201 unsigned long paddr, ctrl;
202 unsigned int tx_head = macb->tx_head;
205 paddr = dma_map_single(packet, length, DMA_TO_DEVICE);
207 ctrl = length & TXBUF_FRMLEN_MASK;
208 ctrl |= TXBUF_FRAME_END;
209 if (tx_head == (CONFIG_SYS_MACB_TX_RING_SIZE - 1)) {
215 macb->tx_ring[tx_head].ctrl = ctrl;
216 macb->tx_ring[tx_head].addr = paddr;
218 macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART));
221 * I guess this is necessary because the networking core may
222 * re-use the transmit buffer as soon as we return...
224 for (i = 0; i <= CONFIG_SYS_MACB_TX_TIMEOUT; i++) {
226 ctrl = macb->tx_ring[tx_head].ctrl;
227 if (ctrl & TXBUF_USED)
232 dma_unmap_single(packet, length, paddr);
234 if (i <= CONFIG_SYS_MACB_TX_TIMEOUT) {
235 if (ctrl & TXBUF_UNDERRUN)
236 printf("%s: TX underrun\n", netdev->name);
237 if (ctrl & TXBUF_EXHAUSTED)
238 printf("%s: TX buffers exhausted in mid frame\n",
241 printf("%s: TX timeout\n", netdev->name);
244 /* No one cares anyway */
248 static void reclaim_rx_buffers(struct macb_device *macb,
249 unsigned int new_tail)
254 while (i > new_tail) {
255 macb->rx_ring[i].addr &= ~RXADDR_USED;
257 if (i > CONFIG_SYS_MACB_RX_RING_SIZE)
261 while (i < new_tail) {
262 macb->rx_ring[i].addr &= ~RXADDR_USED;
267 macb->rx_tail = new_tail;
270 static int macb_recv(struct eth_device *netdev)
272 struct macb_device *macb = to_macb(netdev);
273 unsigned int rx_tail = macb->rx_tail;
280 if (!(macb->rx_ring[rx_tail].addr & RXADDR_USED))
283 status = macb->rx_ring[rx_tail].ctrl;
284 if (status & RXBUF_FRAME_START) {
285 if (rx_tail != macb->rx_tail)
286 reclaim_rx_buffers(macb, rx_tail);
290 if (status & RXBUF_FRAME_END) {
291 buffer = macb->rx_buffer + 128 * macb->rx_tail;
292 length = status & RXBUF_FRMLEN_MASK;
294 unsigned int headlen, taillen;
296 headlen = 128 * (CONFIG_SYS_MACB_RX_RING_SIZE
298 taillen = length - headlen;
299 memcpy((void *)NetRxPackets[0],
301 memcpy((void *)NetRxPackets[0] + headlen,
302 macb->rx_buffer, taillen);
303 buffer = (void *)NetRxPackets[0];
306 NetReceive(buffer, length);
307 if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE)
309 reclaim_rx_buffers(macb, rx_tail);
311 if (++rx_tail >= CONFIG_SYS_MACB_RX_RING_SIZE) {
322 static void macb_phy_reset(struct macb_device *macb)
324 struct eth_device *netdev = &macb->netdev;
328 adv = ADVERTISE_CSMA | ADVERTISE_ALL;
329 macb_mdio_write(macb, MII_ADVERTISE, adv);
330 printf("%s: Starting autonegotiation...\n", netdev->name);
331 macb_mdio_write(macb, MII_BMCR, (BMCR_ANENABLE
334 for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) {
335 status = macb_mdio_read(macb, MII_BMSR);
336 if (status & BMSR_ANEGCOMPLETE)
341 if (status & BMSR_ANEGCOMPLETE)
342 printf("%s: Autonegotiation complete\n", netdev->name);
344 printf("%s: Autonegotiation timed out (status=0x%04x)\n",
345 netdev->name, status);
348 #ifdef CONFIG_MACB_SEARCH_PHY
349 static int macb_phy_find(struct macb_device *macb)
354 /* Search for PHY... */
355 for (i = 0; i < 32; i++) {
357 phy_id = macb_mdio_read(macb, MII_PHYSID1);
358 if (phy_id != 0xffff) {
359 printf("%s: PHY present at %d\n", macb->netdev.name, i);
364 /* PHY isn't up to snuff */
365 printf("%s: PHY not found\n", macb->netdev.name);
369 #endif /* CONFIG_MACB_SEARCH_PHY */
372 static int macb_phy_init(struct macb_device *macb)
374 struct eth_device *netdev = &macb->netdev;
376 u16 phy_id, status, adv, lpa;
377 int media, speed, duplex;
380 #ifdef CONFIG_MACB_SEARCH_PHY
381 /* Auto-detect phy_addr */
382 if (!macb_phy_find(macb)) {
385 #endif /* CONFIG_MACB_SEARCH_PHY */
387 /* Check if the PHY is up to snuff... */
388 phy_id = macb_mdio_read(macb, MII_PHYSID1);
389 if (phy_id == 0xffff) {
390 printf("%s: No PHY present\n", netdev->name);
394 status = macb_mdio_read(macb, MII_BMSR);
395 if (!(status & BMSR_LSTATUS)) {
396 /* Try to re-negotiate if we don't have link already. */
397 macb_phy_reset(macb);
399 for (i = 0; i < CONFIG_SYS_MACB_AUTONEG_TIMEOUT / 100; i++) {
400 status = macb_mdio_read(macb, MII_BMSR);
401 if (status & BMSR_LSTATUS)
407 if (!(status & BMSR_LSTATUS)) {
408 printf("%s: link down (status: 0x%04x)\n",
409 netdev->name, status);
412 adv = macb_mdio_read(macb, MII_ADVERTISE);
413 lpa = macb_mdio_read(macb, MII_LPA);
414 media = mii_nway_result(lpa & adv);
415 speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
417 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
418 printf("%s: link up, %sMbps %s-duplex (lpa: 0x%04x)\n",
420 speed ? "100" : "10",
421 duplex ? "full" : "half",
424 ncfgr = macb_readl(macb, NCFGR);
425 ncfgr &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
427 ncfgr |= MACB_BIT(SPD);
429 ncfgr |= MACB_BIT(FD);
430 macb_writel(macb, NCFGR, ncfgr);
435 static int macb_init(struct eth_device *netdev, bd_t *bd)
437 struct macb_device *macb = to_macb(netdev);
442 * macb_halt should have been called at some point before now,
443 * so we'll assume the controller is idle.
446 /* initialize DMA descriptors */
447 paddr = macb->rx_buffer_dma;
448 for (i = 0; i < CONFIG_SYS_MACB_RX_RING_SIZE; i++) {
449 if (i == (CONFIG_SYS_MACB_RX_RING_SIZE - 1))
450 paddr |= RXADDR_WRAP;
451 macb->rx_ring[i].addr = paddr;
452 macb->rx_ring[i].ctrl = 0;
455 for (i = 0; i < CONFIG_SYS_MACB_TX_RING_SIZE; i++) {
456 macb->tx_ring[i].addr = 0;
457 if (i == (CONFIG_SYS_MACB_TX_RING_SIZE - 1))
458 macb->tx_ring[i].ctrl = TXBUF_USED | TXBUF_WRAP;
460 macb->tx_ring[i].ctrl = TXBUF_USED;
462 macb->rx_tail = macb->tx_head = macb->tx_tail = 0;
464 macb_writel(macb, RBQP, macb->rx_ring_dma);
465 macb_writel(macb, TBQP, macb->tx_ring_dma);
467 /* choose RMII or MII mode. This depends on the board */
469 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
470 defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
471 defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
472 defined(CONFIG_AT91SAM9XE) || defined(CONFIG_AT91SAM9X5)
473 macb_writel(macb, USRIO, MACB_BIT(RMII) | MACB_BIT(CLKEN));
475 macb_writel(macb, USRIO, 0);
478 #if defined(CONFIG_AT91CAP9) || defined(CONFIG_AT91SAM9260) || \
479 defined(CONFIG_AT91SAM9263) || defined(CONFIG_AT91SAM9G20) || \
480 defined(CONFIG_AT91SAM9G45) || defined(CONFIG_AT91SAM9M10G45) || \
481 defined(CONFIG_AT91SAM9XE) || defined(CONFIG_AT91SAM9X5)
482 macb_writel(macb, USRIO, MACB_BIT(CLKEN));
484 macb_writel(macb, USRIO, MACB_BIT(MII));
486 #endif /* CONFIG_RMII */
488 if (!macb_phy_init(macb))
491 /* Enable TX and RX */
492 macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE));
497 static void macb_halt(struct eth_device *netdev)
499 struct macb_device *macb = to_macb(netdev);
502 /* Halt the controller and wait for any ongoing transmission to end. */
503 ncr = macb_readl(macb, NCR);
504 ncr |= MACB_BIT(THALT);
505 macb_writel(macb, NCR, ncr);
508 tsr = macb_readl(macb, TSR);
509 } while (tsr & MACB_BIT(TGO));
511 /* Disable TX and RX, and clear statistics */
512 macb_writel(macb, NCR, MACB_BIT(CLRSTAT));
515 static int macb_write_hwaddr(struct eth_device *dev)
517 struct macb_device *macb = to_macb(dev);
521 /* set hardware address */
522 hwaddr_bottom = dev->enetaddr[0] | dev->enetaddr[1] << 8 |
523 dev->enetaddr[2] << 16 | dev->enetaddr[3] << 24;
524 macb_writel(macb, SA1B, hwaddr_bottom);
525 hwaddr_top = dev->enetaddr[4] | dev->enetaddr[5] << 8;
526 macb_writel(macb, SA1T, hwaddr_top);
530 int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
532 struct macb_device *macb;
533 struct eth_device *netdev;
534 unsigned long macb_hz;
537 macb = malloc(sizeof(struct macb_device));
539 printf("Error: Failed to allocate memory for MACB%d\n", id);
542 memset(macb, 0, sizeof(struct macb_device));
544 netdev = &macb->netdev;
546 macb->rx_buffer = dma_alloc_coherent(CONFIG_SYS_MACB_RX_BUFFER_SIZE,
547 &macb->rx_buffer_dma);
548 macb->rx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_RX_RING_SIZE
549 * sizeof(struct macb_dma_desc),
551 macb->tx_ring = dma_alloc_coherent(CONFIG_SYS_MACB_TX_RING_SIZE
552 * sizeof(struct macb_dma_desc),
556 macb->phy_addr = phy_addr;
558 sprintf(netdev->name, "macb%d", id);
559 netdev->init = macb_init;
560 netdev->halt = macb_halt;
561 netdev->send = macb_send;
562 netdev->recv = macb_recv;
563 netdev->write_hwaddr = macb_write_hwaddr;
566 * Do some basic initialization so that we at least can talk
569 macb_hz = get_macb_pclk_rate(id);
570 if (macb_hz < 20000000)
571 ncfgr = MACB_BF(CLK, MACB_CLK_DIV8);
572 else if (macb_hz < 40000000)
573 ncfgr = MACB_BF(CLK, MACB_CLK_DIV16);
574 else if (macb_hz < 80000000)
575 ncfgr = MACB_BF(CLK, MACB_CLK_DIV32);
577 ncfgr = MACB_BF(CLK, MACB_CLK_DIV64);
579 macb_writel(macb, NCFGR, ncfgr);
581 eth_register(netdev);
583 #if defined(CONFIG_CMD_MII)
584 miiphy_register(netdev->name, macb_miiphy_read, macb_miiphy_write);