1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2005-2006 Atmel Corporation
10 * The u-boot networking stack is a little weird. It seems like the
11 * networking core allocates receive buffers up front without any
12 * regard to the hardware that's supposed to actually receive those
15 * The MACB receives packets into 128-byte receive buffers, so the
16 * buffers allocated by the core isn't very practical to use. We'll
17 * allocate our own, but we need one such buffer in case a packet
18 * wraps around the DMA ring so that we have to copy it.
20 * Therefore, define CONFIG_SYS_RX_ETH_BUFFER to 1 in the board-specific
21 * configuration header. This way, the core allocates one RX buffer
22 * and one TX buffer, each of which can hold a ethernet packet of
25 * For some reason, the networking core unconditionally specifies a
26 * 32-byte packet "alignment" (which really should be called
27 * "padding"). MACB shouldn't need that, but we'll refrain from any
28 * core modifications here...
38 #include <linux/mii.h>
40 #include <asm/dma-mapping.h>
41 #include <asm/arch/clk.h>
42 #include <linux/errno.h>
46 DECLARE_GLOBAL_DATA_PTR;
49 * These buffer sizes must be power of 2 and divisible
50 * by RX_BUFFER_MULTIPLE
52 #define MACB_RX_BUFFER_SIZE 128
53 #define GEM_RX_BUFFER_SIZE 2048
54 #define RX_BUFFER_MULTIPLE 64
56 #define MACB_RX_RING_SIZE 32
57 #define MACB_TX_RING_SIZE 16
59 #define MACB_TX_TIMEOUT 1000
60 #define MACB_AUTONEG_TIMEOUT 5000000
62 #ifdef CONFIG_MACB_ZYNQ
63 /* INCR4 AHB bursts */
64 #define MACB_ZYNQ_GEM_DMACR_BLENGTH 0x00000004
65 /* Use full configured addressable space (8 Kb) */
66 #define MACB_ZYNQ_GEM_DMACR_RXSIZE 0x00000300
67 /* Use full configured addressable space (4 Kb) */
68 #define MACB_ZYNQ_GEM_DMACR_TXSIZE 0x00000400
69 /* Set RXBUF with use of 128 byte */
70 #define MACB_ZYNQ_GEM_DMACR_RXBUF 0x00020000
71 #define MACB_ZYNQ_GEM_DMACR_INIT \
72 (MACB_ZYNQ_GEM_DMACR_BLENGTH | \
73 MACB_ZYNQ_GEM_DMACR_RXSIZE | \
74 MACB_ZYNQ_GEM_DMACR_TXSIZE | \
75 MACB_ZYNQ_GEM_DMACR_RXBUF)
78 struct macb_dma_desc {
83 #define DMA_DESC_BYTES(n) (n * sizeof(struct macb_dma_desc))
84 #define MACB_TX_DMA_DESC_SIZE (DMA_DESC_BYTES(MACB_TX_RING_SIZE))
85 #define MACB_RX_DMA_DESC_SIZE (DMA_DESC_BYTES(MACB_RX_RING_SIZE))
86 #define MACB_TX_DUMMY_DMA_DESC_SIZE (DMA_DESC_BYTES(1))
88 #define RXBUF_FRMLEN_MASK 0x00000fff
89 #define TXBUF_FRMLEN_MASK 0x000007ff
96 const struct macb_config *config;
100 unsigned int tx_tail;
101 unsigned int next_rx_tail;
106 struct macb_dma_desc *rx_ring;
107 struct macb_dma_desc *tx_ring;
108 size_t rx_buffer_size;
110 unsigned long rx_buffer_dma;
111 unsigned long rx_ring_dma;
112 unsigned long tx_ring_dma;
114 struct macb_dma_desc *dummy_desc;
115 unsigned long dummy_desc_dma;
117 const struct device *dev;
118 #ifndef CONFIG_DM_ETH
119 struct eth_device netdev;
121 unsigned short phy_addr;
124 struct phy_device *phydev;
129 unsigned long pclk_rate;
131 phy_interface_t phy_interface;
136 unsigned int dma_burst_length;
138 int (*clk_init)(struct udevice *dev, ulong rate);
141 #ifndef CONFIG_DM_ETH
142 #define to_macb(_nd) container_of(_nd, struct macb_device, netdev)
145 static int macb_is_gem(struct macb_device *macb)
147 return MACB_BFEXT(IDNUM, macb_readl(macb, MID)) >= 0x2;
150 #ifndef cpu_is_sama5d2
151 #define cpu_is_sama5d2() 0
154 #ifndef cpu_is_sama5d4
155 #define cpu_is_sama5d4() 0
158 static int gem_is_gigabit_capable(struct macb_device *macb)
161 * The GEM controllers embedded in SAMA5D2 and SAMA5D4 are
162 * configured to support only 10/100.
164 return macb_is_gem(macb) && !cpu_is_sama5d2() && !cpu_is_sama5d4();
167 static void macb_mdio_write(struct macb_device *macb, u8 reg, u16 value)
169 unsigned long netctl;
170 unsigned long netstat;
173 netctl = macb_readl(macb, NCR);
174 netctl |= MACB_BIT(MPE);
175 macb_writel(macb, NCR, netctl);
177 frame = (MACB_BF(SOF, 1)
179 | MACB_BF(PHYA, macb->phy_addr)
182 | MACB_BF(DATA, value));
183 macb_writel(macb, MAN, frame);
186 netstat = macb_readl(macb, NSR);
187 } while (!(netstat & MACB_BIT(IDLE)));
189 netctl = macb_readl(macb, NCR);
190 netctl &= ~MACB_BIT(MPE);
191 macb_writel(macb, NCR, netctl);
194 static u16 macb_mdio_read(struct macb_device *macb, u8 reg)
196 unsigned long netctl;
197 unsigned long netstat;
200 netctl = macb_readl(macb, NCR);
201 netctl |= MACB_BIT(MPE);
202 macb_writel(macb, NCR, netctl);
204 frame = (MACB_BF(SOF, 1)
206 | MACB_BF(PHYA, macb->phy_addr)
209 macb_writel(macb, MAN, frame);
212 netstat = macb_readl(macb, NSR);
213 } while (!(netstat & MACB_BIT(IDLE)));
215 frame = macb_readl(macb, MAN);
217 netctl = macb_readl(macb, NCR);
218 netctl &= ~MACB_BIT(MPE);
219 macb_writel(macb, NCR, netctl);
221 return MACB_BFEXT(DATA, frame);
224 void __weak arch_get_mdio_control(const char *name)
229 #if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
231 int macb_miiphy_read(struct mii_dev *bus, int phy_adr, int devad, int reg)
235 struct udevice *dev = eth_get_dev_by_name(bus->name);
236 struct macb_device *macb = dev_get_priv(dev);
238 struct eth_device *dev = eth_get_dev_by_name(bus->name);
239 struct macb_device *macb = to_macb(dev);
242 if (macb->phy_addr != phy_adr)
245 arch_get_mdio_control(bus->name);
246 value = macb_mdio_read(macb, reg);
251 int macb_miiphy_write(struct mii_dev *bus, int phy_adr, int devad, int reg,
255 struct udevice *dev = eth_get_dev_by_name(bus->name);
256 struct macb_device *macb = dev_get_priv(dev);
258 struct eth_device *dev = eth_get_dev_by_name(bus->name);
259 struct macb_device *macb = to_macb(dev);
262 if (macb->phy_addr != phy_adr)
265 arch_get_mdio_control(bus->name);
266 macb_mdio_write(macb, reg, value);
274 static inline void macb_invalidate_ring_desc(struct macb_device *macb, bool rx)
277 invalidate_dcache_range(macb->rx_ring_dma,
278 ALIGN(macb->rx_ring_dma + MACB_RX_DMA_DESC_SIZE,
281 invalidate_dcache_range(macb->tx_ring_dma,
282 ALIGN(macb->tx_ring_dma + MACB_TX_DMA_DESC_SIZE,
286 static inline void macb_flush_ring_desc(struct macb_device *macb, bool rx)
289 flush_dcache_range(macb->rx_ring_dma, macb->rx_ring_dma +
290 ALIGN(MACB_RX_DMA_DESC_SIZE, PKTALIGN));
292 flush_dcache_range(macb->tx_ring_dma, macb->tx_ring_dma +
293 ALIGN(MACB_TX_DMA_DESC_SIZE, PKTALIGN));
296 static inline void macb_flush_rx_buffer(struct macb_device *macb)
298 flush_dcache_range(macb->rx_buffer_dma, macb->rx_buffer_dma +
299 ALIGN(MACB_RX_BUFFER_SIZE, PKTALIGN));
302 static inline void macb_invalidate_rx_buffer(struct macb_device *macb)
304 invalidate_dcache_range(macb->rx_buffer_dma, macb->rx_buffer_dma +
305 ALIGN(MACB_RX_BUFFER_SIZE, PKTALIGN));
308 #if defined(CONFIG_CMD_NET)
310 static int _macb_send(struct macb_device *macb, const char *name, void *packet,
313 unsigned long paddr, ctrl;
314 unsigned int tx_head = macb->tx_head;
317 paddr = dma_map_single(packet, length, DMA_TO_DEVICE);
319 ctrl = length & TXBUF_FRMLEN_MASK;
320 ctrl |= MACB_BIT(TX_LAST);
321 if (tx_head == (MACB_TX_RING_SIZE - 1)) {
322 ctrl |= MACB_BIT(TX_WRAP);
328 macb->tx_ring[tx_head].ctrl = ctrl;
329 macb->tx_ring[tx_head].addr = paddr;
331 macb_flush_ring_desc(macb, TX);
332 /* Do we need check paddr and length is dcache line aligned? */
333 flush_dcache_range(paddr, paddr + ALIGN(length, ARCH_DMA_MINALIGN));
334 macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE) | MACB_BIT(TSTART));
337 * I guess this is necessary because the networking core may
338 * re-use the transmit buffer as soon as we return...
340 for (i = 0; i <= MACB_TX_TIMEOUT; i++) {
342 macb_invalidate_ring_desc(macb, TX);
343 ctrl = macb->tx_ring[tx_head].ctrl;
344 if (ctrl & MACB_BIT(TX_USED))
349 dma_unmap_single(packet, length, paddr);
351 if (i <= MACB_TX_TIMEOUT) {
352 if (ctrl & MACB_BIT(TX_UNDERRUN))
353 printf("%s: TX underrun\n", name);
354 if (ctrl & MACB_BIT(TX_BUF_EXHAUSTED))
355 printf("%s: TX buffers exhausted in mid frame\n", name);
357 printf("%s: TX timeout\n", name);
360 /* No one cares anyway */
364 static void reclaim_rx_buffers(struct macb_device *macb,
365 unsigned int new_tail)
371 macb_invalidate_ring_desc(macb, RX);
372 while (i > new_tail) {
373 macb->rx_ring[i].addr &= ~MACB_BIT(RX_USED);
375 if (i > MACB_RX_RING_SIZE)
379 while (i < new_tail) {
380 macb->rx_ring[i].addr &= ~MACB_BIT(RX_USED);
385 macb_flush_ring_desc(macb, RX);
386 macb->rx_tail = new_tail;
389 static int _macb_recv(struct macb_device *macb, uchar **packetp)
391 unsigned int next_rx_tail = macb->next_rx_tail;
396 macb->wrapped = false;
398 macb_invalidate_ring_desc(macb, RX);
400 if (!(macb->rx_ring[next_rx_tail].addr & MACB_BIT(RX_USED)))
403 status = macb->rx_ring[next_rx_tail].ctrl;
404 if (status & MACB_BIT(RX_SOF)) {
405 if (next_rx_tail != macb->rx_tail)
406 reclaim_rx_buffers(macb, next_rx_tail);
407 macb->wrapped = false;
410 if (status & MACB_BIT(RX_EOF)) {
411 buffer = macb->rx_buffer +
412 macb->rx_buffer_size * macb->rx_tail;
413 length = status & RXBUF_FRMLEN_MASK;
415 macb_invalidate_rx_buffer(macb);
417 unsigned int headlen, taillen;
419 headlen = macb->rx_buffer_size *
420 (MACB_RX_RING_SIZE - macb->rx_tail);
421 taillen = length - headlen;
422 memcpy((void *)net_rx_packets[0],
424 memcpy((void *)net_rx_packets[0] + headlen,
425 macb->rx_buffer, taillen);
426 *packetp = (void *)net_rx_packets[0];
431 if (++next_rx_tail >= MACB_RX_RING_SIZE)
433 macb->next_rx_tail = next_rx_tail;
436 if (++next_rx_tail >= MACB_RX_RING_SIZE) {
437 macb->wrapped = true;
445 static void macb_phy_reset(struct macb_device *macb, const char *name)
450 adv = ADVERTISE_CSMA | ADVERTISE_ALL;
451 macb_mdio_write(macb, MII_ADVERTISE, adv);
452 printf("%s: Starting autonegotiation...\n", name);
453 macb_mdio_write(macb, MII_BMCR, (BMCR_ANENABLE
456 for (i = 0; i < MACB_AUTONEG_TIMEOUT / 100; i++) {
457 status = macb_mdio_read(macb, MII_BMSR);
458 if (status & BMSR_ANEGCOMPLETE)
463 if (status & BMSR_ANEGCOMPLETE)
464 printf("%s: Autonegotiation complete\n", name);
466 printf("%s: Autonegotiation timed out (status=0x%04x)\n",
470 static int macb_phy_find(struct macb_device *macb, const char *name)
475 /* Search for PHY... */
476 for (i = 0; i < 32; i++) {
478 phy_id = macb_mdio_read(macb, MII_PHYSID1);
479 if (phy_id != 0xffff) {
480 printf("%s: PHY present at %d\n", name, i);
485 /* PHY isn't up to snuff */
486 printf("%s: PHY not found\n", name);
492 * macb_linkspd_cb - Linkspeed change callback function
493 * @dev/@regs: MACB udevice (DM version) or
494 * Base Register of MACB devices (non-DM version)
496 * Returns 0 when operation success and negative errno number
497 * when operation failed.
500 static int macb_sifive_clk_init(struct udevice *dev, ulong rate)
505 addr = dev_read_addr_index(dev, 1);
506 if (addr == FDT_ADDR_T_NONE)
509 gemgxl_regs = (void __iomem *)addr;
514 * SiFive GEMGXL TX clock operation mode:
516 * 0 = GMII mode. Use 125 MHz gemgxlclk from PRCI in TX logic
517 * and output clock on GMII output signal GTX_CLK
518 * 1 = MII mode. Use MII input signal TX_CLK in TX logic
520 writel(rate != 125000000, gemgxl_regs);
524 int __weak macb_linkspd_cb(struct udevice *dev, unsigned int speed)
527 struct macb_device *macb = dev_get_priv(dev);
534 rate = 2500000; /* 2.5 MHz */
537 rate = 25000000; /* 25 MHz */
540 rate = 125000000; /* 125 MHz */
543 /* does not change anything */
547 if (macb->config->clk_init)
548 return macb->config->clk_init(dev, rate);
551 * "tx_clk" is an optional clock source for MACB.
552 * Ignore if it does not exist in DT.
554 ret = clk_get_by_name(dev, "tx_clk", &tx_clk);
559 ret = clk_set_rate(&tx_clk, rate);
568 int __weak macb_linkspd_cb(void *regs, unsigned int speed)
575 static int macb_phy_init(struct udevice *dev, const char *name)
577 static int macb_phy_init(struct macb_device *macb, const char *name)
581 struct macb_device *macb = dev_get_priv(dev);
584 u16 phy_id, status, adv, lpa;
585 int media, speed, duplex;
589 arch_get_mdio_control(name);
590 /* Auto-detect phy_addr */
591 ret = macb_phy_find(macb, name);
595 /* Check if the PHY is up to snuff... */
596 phy_id = macb_mdio_read(macb, MII_PHYSID1);
597 if (phy_id == 0xffff) {
598 printf("%s: No PHY present\n", name);
604 macb->phydev = phy_connect(macb->bus, macb->phy_addr, dev,
605 macb->phy_interface);
607 /* need to consider other phy interface mode */
608 macb->phydev = phy_connect(macb->bus, macb->phy_addr, &macb->netdev,
609 PHY_INTERFACE_MODE_RGMII);
612 printf("phy_connect failed\n");
616 phy_config(macb->phydev);
619 status = macb_mdio_read(macb, MII_BMSR);
620 if (!(status & BMSR_LSTATUS)) {
621 /* Try to re-negotiate if we don't have link already. */
622 macb_phy_reset(macb, name);
624 for (i = 0; i < MACB_AUTONEG_TIMEOUT / 100; i++) {
625 status = macb_mdio_read(macb, MII_BMSR);
626 if (status & BMSR_LSTATUS) {
628 * Delay a bit after the link is established,
629 * so that the next xfer does not fail
638 if (!(status & BMSR_LSTATUS)) {
639 printf("%s: link down (status: 0x%04x)\n",
644 /* First check for GMAC and that it is GiB capable */
645 if (gem_is_gigabit_capable(macb)) {
646 lpa = macb_mdio_read(macb, MII_STAT1000);
648 if (lpa & (LPA_1000FULL | LPA_1000HALF | LPA_1000XFULL |
650 duplex = ((lpa & (LPA_1000FULL | LPA_1000XFULL)) ?
653 printf("%s: link up, 1000Mbps %s-duplex (lpa: 0x%04x)\n",
655 duplex ? "full" : "half",
658 ncfgr = macb_readl(macb, NCFGR);
659 ncfgr &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
660 ncfgr |= GEM_BIT(GBE);
663 ncfgr |= MACB_BIT(FD);
665 macb_writel(macb, NCFGR, ncfgr);
668 ret = macb_linkspd_cb(dev, _1000BASET);
670 ret = macb_linkspd_cb(macb->regs, _1000BASET);
679 /* fall back for EMAC checking */
680 adv = macb_mdio_read(macb, MII_ADVERTISE);
681 lpa = macb_mdio_read(macb, MII_LPA);
682 media = mii_nway_result(lpa & adv);
683 speed = (media & (ADVERTISE_100FULL | ADVERTISE_100HALF)
685 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
686 printf("%s: link up, %sMbps %s-duplex (lpa: 0x%04x)\n",
688 speed ? "100" : "10",
689 duplex ? "full" : "half",
692 ncfgr = macb_readl(macb, NCFGR);
693 ncfgr &= ~(MACB_BIT(SPD) | MACB_BIT(FD) | GEM_BIT(GBE));
695 ncfgr |= MACB_BIT(SPD);
697 ret = macb_linkspd_cb(dev, _100BASET);
699 ret = macb_linkspd_cb(macb->regs, _100BASET);
703 ret = macb_linkspd_cb(dev, _10BASET);
705 ret = macb_linkspd_cb(macb->regs, _10BASET);
713 ncfgr |= MACB_BIT(FD);
714 macb_writel(macb, NCFGR, ncfgr);
719 static int gmac_init_multi_queues(struct macb_device *macb)
721 int i, num_queues = 1;
724 /* bit 0 is never set but queue 0 always exists */
725 queue_mask = gem_readl(macb, DCFG6) & 0xff;
728 for (i = 1; i < MACB_MAX_QUEUES; i++)
729 if (queue_mask & (1 << i))
732 macb->dummy_desc->ctrl = MACB_BIT(TX_USED);
733 macb->dummy_desc->addr = 0;
734 flush_dcache_range(macb->dummy_desc_dma, macb->dummy_desc_dma +
735 ALIGN(MACB_TX_DUMMY_DMA_DESC_SIZE, PKTALIGN));
737 for (i = 1; i < num_queues; i++)
738 gem_writel_queue_TBQP(macb, macb->dummy_desc_dma, i - 1);
743 static void gmac_configure_dma(struct macb_device *macb)
748 buffer_size = macb->rx_buffer_size / RX_BUFFER_MULTIPLE;
749 dmacfg = gem_readl(macb, DMACFG) & ~GEM_BF(RXBS, -1L);
750 dmacfg |= GEM_BF(RXBS, buffer_size);
752 if (macb->config->dma_burst_length)
753 dmacfg = GEM_BFINS(FBLDO,
754 macb->config->dma_burst_length, dmacfg);
756 dmacfg |= GEM_BIT(TXPBMS) | GEM_BF(RXBMS, -1L);
757 dmacfg &= ~GEM_BIT(ENDIA_PKT);
759 if (macb->is_big_endian)
760 dmacfg |= GEM_BIT(ENDIA_DESC); /* CPU in big endian */
762 dmacfg &= ~GEM_BIT(ENDIA_DESC);
764 dmacfg &= ~GEM_BIT(ADDR64);
765 gem_writel(macb, DMACFG, dmacfg);
769 static int _macb_init(struct udevice *dev, const char *name)
771 static int _macb_init(struct macb_device *macb, const char *name)
775 struct macb_device *macb = dev_get_priv(dev);
782 * macb_halt should have been called at some point before now,
783 * so we'll assume the controller is idle.
786 /* initialize DMA descriptors */
787 paddr = macb->rx_buffer_dma;
788 for (i = 0; i < MACB_RX_RING_SIZE; i++) {
789 if (i == (MACB_RX_RING_SIZE - 1))
790 paddr |= MACB_BIT(RX_WRAP);
791 macb->rx_ring[i].addr = paddr;
792 macb->rx_ring[i].ctrl = 0;
793 paddr += macb->rx_buffer_size;
795 macb_flush_ring_desc(macb, RX);
796 macb_flush_rx_buffer(macb);
798 for (i = 0; i < MACB_TX_RING_SIZE; i++) {
799 macb->tx_ring[i].addr = 0;
800 if (i == (MACB_TX_RING_SIZE - 1))
801 macb->tx_ring[i].ctrl = MACB_BIT(TX_USED) |
804 macb->tx_ring[i].ctrl = MACB_BIT(TX_USED);
806 macb_flush_ring_desc(macb, TX);
811 macb->next_rx_tail = 0;
813 #ifdef CONFIG_MACB_ZYNQ
814 macb_writel(macb, DMACFG, MACB_ZYNQ_GEM_DMACR_INIT);
817 macb_writel(macb, RBQP, macb->rx_ring_dma);
818 macb_writel(macb, TBQP, macb->tx_ring_dma);
820 if (macb_is_gem(macb)) {
821 /* Initialize DMA properties */
822 gmac_configure_dma(macb);
823 /* Check the multi queue and initialize the queue for tx */
824 gmac_init_multi_queues(macb);
827 * When the GMAC IP with GE feature, this bit is used to
828 * select interface between RGMII and GMII.
829 * When the GMAC IP without GE feature, this bit is used
830 * to select interface between RMII and MII.
833 if ((macb->phy_interface == PHY_INTERFACE_MODE_RMII) ||
834 (macb->phy_interface == PHY_INTERFACE_MODE_RGMII))
835 gem_writel(macb, USRIO, GEM_BIT(RGMII));
837 gem_writel(macb, USRIO, 0);
839 if (macb->phy_interface == PHY_INTERFACE_MODE_SGMII) {
840 unsigned int ncfgr = macb_readl(macb, NCFGR);
842 ncfgr |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL);
843 macb_writel(macb, NCFGR, ncfgr);
846 #if defined(CONFIG_RGMII) || defined(CONFIG_RMII)
847 gem_writel(macb, USRIO, GEM_BIT(RGMII));
849 gem_writel(macb, USRIO, 0);
853 /* choose RMII or MII mode. This depends on the board */
855 #ifdef CONFIG_AT91FAMILY
856 if (macb->phy_interface == PHY_INTERFACE_MODE_RMII) {
857 macb_writel(macb, USRIO,
858 MACB_BIT(RMII) | MACB_BIT(CLKEN));
860 macb_writel(macb, USRIO, MACB_BIT(CLKEN));
863 if (macb->phy_interface == PHY_INTERFACE_MODE_RMII)
864 macb_writel(macb, USRIO, 0);
866 macb_writel(macb, USRIO, MACB_BIT(MII));
870 #ifdef CONFIG_AT91FAMILY
871 macb_writel(macb, USRIO, MACB_BIT(RMII) | MACB_BIT(CLKEN));
873 macb_writel(macb, USRIO, 0);
876 #ifdef CONFIG_AT91FAMILY
877 macb_writel(macb, USRIO, MACB_BIT(CLKEN));
879 macb_writel(macb, USRIO, MACB_BIT(MII));
881 #endif /* CONFIG_RMII */
886 ret = macb_phy_init(dev, name);
888 ret = macb_phy_init(macb, name);
893 /* Enable TX and RX */
894 macb_writel(macb, NCR, MACB_BIT(TE) | MACB_BIT(RE));
899 static void _macb_halt(struct macb_device *macb)
903 /* Halt the controller and wait for any ongoing transmission to end. */
904 ncr = macb_readl(macb, NCR);
905 ncr |= MACB_BIT(THALT);
906 macb_writel(macb, NCR, ncr);
909 tsr = macb_readl(macb, TSR);
910 } while (tsr & MACB_BIT(TGO));
912 /* Disable TX and RX, and clear statistics */
913 macb_writel(macb, NCR, MACB_BIT(CLRSTAT));
916 static int _macb_write_hwaddr(struct macb_device *macb, unsigned char *enetaddr)
921 /* set hardware address */
922 hwaddr_bottom = enetaddr[0] | enetaddr[1] << 8 |
923 enetaddr[2] << 16 | enetaddr[3] << 24;
924 macb_writel(macb, SA1B, hwaddr_bottom);
925 hwaddr_top = enetaddr[4] | enetaddr[5] << 8;
926 macb_writel(macb, SA1T, hwaddr_top);
930 static u32 macb_mdc_clk_div(int id, struct macb_device *macb)
933 #if defined(CONFIG_DM_ETH) && defined(CONFIG_CLK)
934 unsigned long macb_hz = macb->pclk_rate;
936 unsigned long macb_hz = get_macb_pclk_rate(id);
939 if (macb_hz < 20000000)
940 config = MACB_BF(CLK, MACB_CLK_DIV8);
941 else if (macb_hz < 40000000)
942 config = MACB_BF(CLK, MACB_CLK_DIV16);
943 else if (macb_hz < 80000000)
944 config = MACB_BF(CLK, MACB_CLK_DIV32);
946 config = MACB_BF(CLK, MACB_CLK_DIV64);
951 static u32 gem_mdc_clk_div(int id, struct macb_device *macb)
955 #if defined(CONFIG_DM_ETH) && defined(CONFIG_CLK)
956 unsigned long macb_hz = macb->pclk_rate;
958 unsigned long macb_hz = get_macb_pclk_rate(id);
961 if (macb_hz < 20000000)
962 config = GEM_BF(CLK, GEM_CLK_DIV8);
963 else if (macb_hz < 40000000)
964 config = GEM_BF(CLK, GEM_CLK_DIV16);
965 else if (macb_hz < 80000000)
966 config = GEM_BF(CLK, GEM_CLK_DIV32);
967 else if (macb_hz < 120000000)
968 config = GEM_BF(CLK, GEM_CLK_DIV48);
969 else if (macb_hz < 160000000)
970 config = GEM_BF(CLK, GEM_CLK_DIV64);
971 else if (macb_hz < 240000000)
972 config = GEM_BF(CLK, GEM_CLK_DIV96);
973 else if (macb_hz < 320000000)
974 config = GEM_BF(CLK, GEM_CLK_DIV128);
976 config = GEM_BF(CLK, GEM_CLK_DIV224);
982 * Get the DMA bus width field of the network configuration register that we
983 * should program. We find the width from decoding the design configuration
984 * register to find the maximum supported data bus width.
986 static u32 macb_dbw(struct macb_device *macb)
988 switch (GEM_BFEXT(DBWDEF, gem_readl(macb, DCFG1))) {
990 return GEM_BF(DBW, GEM_DBW128);
992 return GEM_BF(DBW, GEM_DBW64);
995 return GEM_BF(DBW, GEM_DBW32);
999 static void _macb_eth_initialize(struct macb_device *macb)
1001 int id = 0; /* This is not used by functions we call */
1004 if (macb_is_gem(macb))
1005 macb->rx_buffer_size = GEM_RX_BUFFER_SIZE;
1007 macb->rx_buffer_size = MACB_RX_BUFFER_SIZE;
1009 /* TODO: we need check the rx/tx_ring_dma is dcache line aligned */
1010 macb->rx_buffer = dma_alloc_coherent(macb->rx_buffer_size *
1012 &macb->rx_buffer_dma);
1013 macb->rx_ring = dma_alloc_coherent(MACB_RX_DMA_DESC_SIZE,
1014 &macb->rx_ring_dma);
1015 macb->tx_ring = dma_alloc_coherent(MACB_TX_DMA_DESC_SIZE,
1016 &macb->tx_ring_dma);
1017 macb->dummy_desc = dma_alloc_coherent(MACB_TX_DUMMY_DMA_DESC_SIZE,
1018 &macb->dummy_desc_dma);
1021 * Do some basic initialization so that we at least can talk
1024 if (macb_is_gem(macb)) {
1025 ncfgr = gem_mdc_clk_div(id, macb);
1026 ncfgr |= macb_dbw(macb);
1028 ncfgr = macb_mdc_clk_div(id, macb);
1031 macb_writel(macb, NCFGR, ncfgr);
1034 #ifndef CONFIG_DM_ETH
1035 static int macb_send(struct eth_device *netdev, void *packet, int length)
1037 struct macb_device *macb = to_macb(netdev);
1039 return _macb_send(macb, netdev->name, packet, length);
1042 static int macb_recv(struct eth_device *netdev)
1044 struct macb_device *macb = to_macb(netdev);
1048 macb->wrapped = false;
1050 macb->next_rx_tail = macb->rx_tail;
1051 length = _macb_recv(macb, &packet);
1053 net_process_received_packet(packet, length);
1054 reclaim_rx_buffers(macb, macb->next_rx_tail);
1061 static int macb_init(struct eth_device *netdev, bd_t *bd)
1063 struct macb_device *macb = to_macb(netdev);
1065 return _macb_init(macb, netdev->name);
1068 static void macb_halt(struct eth_device *netdev)
1070 struct macb_device *macb = to_macb(netdev);
1072 return _macb_halt(macb);
1075 static int macb_write_hwaddr(struct eth_device *netdev)
1077 struct macb_device *macb = to_macb(netdev);
1079 return _macb_write_hwaddr(macb, netdev->enetaddr);
1082 int macb_eth_initialize(int id, void *regs, unsigned int phy_addr)
1084 struct macb_device *macb;
1085 struct eth_device *netdev;
1087 macb = malloc(sizeof(struct macb_device));
1089 printf("Error: Failed to allocate memory for MACB%d\n", id);
1092 memset(macb, 0, sizeof(struct macb_device));
1094 netdev = &macb->netdev;
1097 macb->phy_addr = phy_addr;
1099 if (macb_is_gem(macb))
1100 sprintf(netdev->name, "gmac%d", id);
1102 sprintf(netdev->name, "macb%d", id);
1104 netdev->init = macb_init;
1105 netdev->halt = macb_halt;
1106 netdev->send = macb_send;
1107 netdev->recv = macb_recv;
1108 netdev->write_hwaddr = macb_write_hwaddr;
1110 _macb_eth_initialize(macb);
1112 eth_register(netdev);
1114 #if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
1116 struct mii_dev *mdiodev = mdio_alloc();
1119 strncpy(mdiodev->name, netdev->name, MDIO_NAME_LEN);
1120 mdiodev->read = macb_miiphy_read;
1121 mdiodev->write = macb_miiphy_write;
1123 retval = mdio_register(mdiodev);
1126 macb->bus = miiphy_get_dev_by_name(netdev->name);
1130 #endif /* !CONFIG_DM_ETH */
1132 #ifdef CONFIG_DM_ETH
1134 static int macb_start(struct udevice *dev)
1136 return _macb_init(dev, dev->name);
1139 static int macb_send(struct udevice *dev, void *packet, int length)
1141 struct macb_device *macb = dev_get_priv(dev);
1143 return _macb_send(macb, dev->name, packet, length);
1146 static int macb_recv(struct udevice *dev, int flags, uchar **packetp)
1148 struct macb_device *macb = dev_get_priv(dev);
1150 macb->next_rx_tail = macb->rx_tail;
1151 macb->wrapped = false;
1153 return _macb_recv(macb, packetp);
1156 static int macb_free_pkt(struct udevice *dev, uchar *packet, int length)
1158 struct macb_device *macb = dev_get_priv(dev);
1160 reclaim_rx_buffers(macb, macb->next_rx_tail);
1165 static void macb_stop(struct udevice *dev)
1167 struct macb_device *macb = dev_get_priv(dev);
1172 static int macb_write_hwaddr(struct udevice *dev)
1174 struct eth_pdata *plat = dev_get_platdata(dev);
1175 struct macb_device *macb = dev_get_priv(dev);
1177 return _macb_write_hwaddr(macb, plat->enetaddr);
1180 static const struct eth_ops macb_eth_ops = {
1181 .start = macb_start,
1185 .free_pkt = macb_free_pkt,
1186 .write_hwaddr = macb_write_hwaddr,
1190 static int macb_enable_clk(struct udevice *dev)
1192 struct macb_device *macb = dev_get_priv(dev);
1197 ret = clk_get_by_index(dev, 0, &clk);
1202 * If clock driver didn't support enable or disable then
1203 * we get -ENOSYS from clk_enable(). To handle this, we
1204 * don't fail for ret == -ENOSYS.
1206 ret = clk_enable(&clk);
1207 if (ret && ret != -ENOSYS)
1210 clk_rate = clk_get_rate(&clk);
1214 macb->pclk_rate = clk_rate;
1220 static const struct macb_config default_gem_config = {
1221 .dma_burst_length = 16,
1225 static int macb_eth_probe(struct udevice *dev)
1227 struct eth_pdata *pdata = dev_get_platdata(dev);
1228 struct macb_device *macb = dev_get_priv(dev);
1229 const char *phy_mode;
1232 phy_mode = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy-mode",
1235 macb->phy_interface = phy_get_interface_by_name(phy_mode);
1236 if (macb->phy_interface == -1) {
1237 debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode);
1241 macb->regs = (void *)pdata->iobase;
1243 macb->is_big_endian = (cpu_to_be32(0x12345678) == 0x12345678);
1245 macb->config = (struct macb_config *)dev_get_driver_data(dev);
1247 macb->config = &default_gem_config;
1250 ret = macb_enable_clk(dev);
1255 _macb_eth_initialize(macb);
1257 #if defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
1258 macb->bus = mdio_alloc();
1261 strncpy(macb->bus->name, dev->name, MDIO_NAME_LEN);
1262 macb->bus->read = macb_miiphy_read;
1263 macb->bus->write = macb_miiphy_write;
1265 ret = mdio_register(macb->bus);
1268 macb->bus = miiphy_get_dev_by_name(dev->name);
1274 static int macb_eth_remove(struct udevice *dev)
1276 struct macb_device *macb = dev_get_priv(dev);
1278 #ifdef CONFIG_PHYLIB
1281 mdio_unregister(macb->bus);
1282 mdio_free(macb->bus);
1288 * macb_late_eth_ofdata_to_platdata
1289 * @dev: udevice struct
1290 * Returns 0 when operation success and negative errno number
1291 * when operation failed.
1293 int __weak macb_late_eth_ofdata_to_platdata(struct udevice *dev)
1298 static int macb_eth_ofdata_to_platdata(struct udevice *dev)
1300 struct eth_pdata *pdata = dev_get_platdata(dev);
1302 pdata->iobase = (phys_addr_t)dev_remap_addr(dev);
1306 return macb_late_eth_ofdata_to_platdata(dev);
1309 static const struct macb_config sama5d4_config = {
1310 .dma_burst_length = 4,
1314 static const struct macb_config sifive_config = {
1315 .dma_burst_length = 16,
1316 .clk_init = macb_sifive_clk_init,
1319 static const struct udevice_id macb_eth_ids[] = {
1320 { .compatible = "cdns,macb" },
1321 { .compatible = "cdns,at91sam9260-macb" },
1322 { .compatible = "atmel,sama5d2-gem" },
1323 { .compatible = "atmel,sama5d3-gem" },
1324 { .compatible = "atmel,sama5d4-gem", .data = (ulong)&sama5d4_config },
1325 { .compatible = "cdns,zynq-gem" },
1326 { .compatible = "sifive,fu540-c000-gem",
1327 .data = (ulong)&sifive_config },
1331 U_BOOT_DRIVER(eth_macb) = {
1334 .of_match = macb_eth_ids,
1335 .ofdata_to_platdata = macb_eth_ofdata_to_platdata,
1336 .probe = macb_eth_probe,
1337 .remove = macb_eth_remove,
1338 .ops = &macb_eth_ops,
1339 .priv_auto_alloc_size = sizeof(struct macb_device),
1340 .platdata_auto_alloc_size = sizeof(struct eth_pdata),