1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2009 Ilya Yanok, Emcraft Systems Ltd <yanok@emcraft.com>
4 * (C) Copyright 2008,2009 Eric Jarrige <eric.jarrige@armadeus.org>
5 * (C) Copyright 2008 Armadeus Systems nc
6 * (C) Copyright 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
7 * (C) Copyright 2007 Pengutronix, Juergen Beisert <j.beisert@pengutronix.de>
20 #include <asm/cache.h>
21 #include <asm/global_data.h>
22 #include <linux/delay.h>
23 #include <power/regulator.h>
26 #include <linux/errno.h>
27 #include <linux/compiler.h>
29 #include <asm/arch/clock.h>
30 #include <asm/arch/imx-regs.h>
31 #include <asm/mach-imx/sys_proto.h>
32 #include <asm-generic/gpio.h>
37 DECLARE_GLOBAL_DATA_PTR;
40 * Timeout the transfer after 5 mS. This is usually a bit more, since
41 * the code in the tightloops this timeout is used in adds some overhead.
43 #define FEC_XFER_TIMEOUT 5000
46 * The standard 32-byte DMA alignment does not work on mx6solox, which requires
47 * 64-byte alignment in the DMA RX FEC buffer.
48 * Introduce the FEC_DMA_RX_MINALIGN which can cover mx6solox needs and also
49 * satisfies the alignment on other SoCs (32-bytes)
51 #define FEC_DMA_RX_MINALIGN 64
54 #error "CONFIG_MII has to be defined!"
58 * The i.MX28 operates with packets in big endian. We need to swap them before
59 * sending and after receiving.
62 #define CONFIG_FEC_MXC_SWAP_PACKET
65 #define RXDESC_PER_CACHELINE (ARCH_DMA_MINALIGN/sizeof(struct fec_bd))
67 /* Check various alignment issues at compile time */
68 #if ((ARCH_DMA_MINALIGN < 16) || (ARCH_DMA_MINALIGN % 16 != 0))
69 #error "ARCH_DMA_MINALIGN must be multiple of 16!"
72 #if ((PKTALIGN < ARCH_DMA_MINALIGN) || \
73 (PKTALIGN % ARCH_DMA_MINALIGN != 0))
74 #error "PKTALIGN must be multiple of ARCH_DMA_MINALIGN!"
79 #ifdef CONFIG_FEC_MXC_SWAP_PACKET
80 static void swap_packet(uint32_t *packet, int length)
84 for (i = 0; i < DIV_ROUND_UP(length, 4); i++)
85 packet[i] = __swab32(packet[i]);
89 /* MII-interface related functions */
90 static int fec_mdio_read(struct ethernet_regs *eth, uint8_t phyaddr,
93 uint32_t reg; /* convenient holder for the PHY register */
94 uint32_t phy; /* convenient holder for the PHY */
99 * reading from any PHY's register is done by properly
100 * programming the FEC's MII data register.
102 writel(FEC_IEVENT_MII, ð->ievent);
103 reg = regaddr << FEC_MII_DATA_RA_SHIFT;
104 phy = phyaddr << FEC_MII_DATA_PA_SHIFT;
106 writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA |
107 phy | reg, ð->mii_data);
109 /* wait for the related interrupt */
110 start = get_timer(0);
111 while (!(readl(ð->ievent) & FEC_IEVENT_MII)) {
112 if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
113 printf("Read MDIO failed...\n");
118 /* clear mii interrupt bit */
119 writel(FEC_IEVENT_MII, ð->ievent);
121 /* it's now safe to read the PHY's register */
122 val = (unsigned short)readl(ð->mii_data);
123 debug("%s: phy: %02x reg:%02x val:%#x\n", __func__, phyaddr,
128 #ifndef imx_get_fecclk
129 u32 __weak imx_get_fecclk(void)
135 static int fec_get_clk_rate(void *udev, int idx)
137 struct fec_priv *fec;
141 if (IS_ENABLED(CONFIG_IMX8) ||
142 CONFIG_IS_ENABLED(CLK_CCF)) {
145 ret = uclass_get_device_by_seq(UCLASS_ETH, idx, &dev);
147 debug("Can't get FEC udev: %d\n", ret);
152 fec = dev_get_priv(dev);
154 return fec->clk_rate;
158 return imx_get_fecclk();
162 static void fec_mii_setspeed(struct ethernet_regs *eth)
165 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
166 * and do not drop the Preamble.
168 * The i.MX28 and i.MX6 types have another field in the MSCR (aka
169 * MII_SPEED) register that defines the MDIO output hold time. Earlier
170 * versions are RAZ there, so just ignore the difference and write the
172 * The minimal hold time according to IEE802.3 (clause 22) is 10 ns.
173 * HOLDTIME + 1 is the number of clk cycles the fec is holding the
175 * The HOLDTIME bitfield takes values between 0 and 7 (inclusive).
176 * Given that ceil(clkrate / 5000000) <= 64, the calculation for
177 * holdtime cannot result in a value greater than 3.
184 ret = fec_get_clk_rate(NULL, 0);
186 printf("Can't find FEC0 clk rate: %d\n", ret);
190 speed = DIV_ROUND_UP(pclk, 5000000);
191 hold = DIV_ROUND_UP(pclk, 100000000) - 1;
193 #ifdef FEC_QUIRK_ENET_MAC
196 writel(speed << 1 | hold << 8, ð->mii_speed);
197 debug("%s: mii_speed %08x\n", __func__, readl(ð->mii_speed));
200 static int fec_mdio_write(struct ethernet_regs *eth, uint8_t phyaddr,
201 uint8_t regaddr, uint16_t data)
203 uint32_t reg; /* convenient holder for the PHY register */
204 uint32_t phy; /* convenient holder for the PHY */
207 reg = regaddr << FEC_MII_DATA_RA_SHIFT;
208 phy = phyaddr << FEC_MII_DATA_PA_SHIFT;
210 writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
211 FEC_MII_DATA_TA | phy | reg | data, ð->mii_data);
213 /* wait for the MII interrupt */
214 start = get_timer(0);
215 while (!(readl(ð->ievent) & FEC_IEVENT_MII)) {
216 if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
217 printf("Write MDIO failed...\n");
222 /* clear MII interrupt bit */
223 writel(FEC_IEVENT_MII, ð->ievent);
224 debug("%s: phy: %02x reg:%02x val:%#x\n", __func__, phyaddr,
230 static int fec_phy_read(struct mii_dev *bus, int phyaddr, int dev_addr,
233 return fec_mdio_read(bus->priv, phyaddr, regaddr);
236 static int fec_phy_write(struct mii_dev *bus, int phyaddr, int dev_addr,
237 int regaddr, u16 data)
239 return fec_mdio_write(bus->priv, phyaddr, regaddr, data);
242 #ifndef CONFIG_PHYLIB
243 static int miiphy_restart_aneg(struct eth_device *dev)
246 #if !defined(CONFIG_FEC_MXC_NO_ANEG)
247 struct fec_priv *fec = (struct fec_priv *)dev->priv;
248 struct ethernet_regs *eth = fec->bus->priv;
251 * Wake up from sleep if necessary
252 * Reset PHY, then delay 300ns
254 fec_mdio_write(eth, fec->phy_id, MII_BMCR, BMCR_RESET);
257 /* Set the auto-negotiation advertisement register bits */
258 fec_mdio_write(eth, fec->phy_id, MII_ADVERTISE,
259 LPA_100FULL | LPA_100HALF | LPA_10FULL |
260 LPA_10HALF | PHY_ANLPAR_PSB_802_3);
261 fec_mdio_write(eth, fec->phy_id, MII_BMCR,
262 BMCR_ANENABLE | BMCR_ANRESTART);
264 if (fec->mii_postcall)
265 ret = fec->mii_postcall(fec->phy_id);
271 static int miiphy_wait_aneg(struct eth_device *dev)
275 struct fec_priv *fec = (struct fec_priv *)dev->priv;
276 struct ethernet_regs *eth = fec->bus->priv;
278 /* Wait for AN completion */
279 start = get_timer(0);
281 if (get_timer(start) > (CONFIG_SYS_HZ * 5)) {
282 printf("%s: Autonegotiation timeout\n", dev->name);
286 status = fec_mdio_read(eth, fec->phy_id, MII_BMSR);
288 printf("%s: Autonegotiation failed. status: %d\n",
292 } while (!(status & BMSR_LSTATUS));
298 static int fec_rx_task_enable(struct fec_priv *fec)
300 writel(FEC_R_DES_ACTIVE_RDAR, &fec->eth->r_des_active);
304 static int fec_rx_task_disable(struct fec_priv *fec)
309 static int fec_tx_task_enable(struct fec_priv *fec)
311 writel(FEC_X_DES_ACTIVE_TDAR, &fec->eth->x_des_active);
315 static int fec_tx_task_disable(struct fec_priv *fec)
321 * Initialize receive task's buffer descriptors
322 * @param[in] fec all we know about the device yet
323 * @param[in] count receive buffer count to be allocated
324 * @param[in] dsize desired size of each receive buffer
325 * Return: 0 on success
327 * Init all RX descriptors to default values.
329 static void fec_rbd_init(struct fec_priv *fec, int count, int dsize)
336 * Reload the RX descriptors with default values and wipe
339 size = roundup(dsize, ARCH_DMA_MINALIGN);
340 for (i = 0; i < count; i++) {
341 data = fec->rbd_base[i].data_pointer;
342 memset((void *)data, 0, dsize);
343 flush_dcache_range(data, data + size);
345 fec->rbd_base[i].status = FEC_RBD_EMPTY;
346 fec->rbd_base[i].data_length = 0;
349 /* Mark the last RBD to close the ring. */
350 fec->rbd_base[i - 1].status = FEC_RBD_WRAP | FEC_RBD_EMPTY;
353 flush_dcache_range((ulong)fec->rbd_base,
354 (ulong)fec->rbd_base + size);
358 * Initialize transmit task's buffer descriptors
359 * @param[in] fec all we know about the device yet
361 * Transmit buffers are created externally. We only have to init the BDs here.\n
362 * Note: There is a race condition in the hardware. When only one BD is in
363 * use it must be marked with the WRAP bit to use it for every transmitt.
364 * This bit in combination with the READY bit results into double transmit
365 * of each data buffer. It seems the state machine checks READY earlier then
366 * resetting it after the first transfer.
367 * Using two BDs solves this issue.
369 static void fec_tbd_init(struct fec_priv *fec)
371 ulong addr = (ulong)fec->tbd_base;
372 unsigned size = roundup(2 * sizeof(struct fec_bd),
375 memset(fec->tbd_base, 0, size);
376 fec->tbd_base[0].status = 0;
377 fec->tbd_base[1].status = FEC_TBD_WRAP;
379 flush_dcache_range(addr, addr + size);
383 * Mark the given read buffer descriptor as free
384 * @param[in] last 1 if this is the last buffer descriptor in the chain, else 0
385 * @param[in] prbd buffer descriptor to mark free again
387 static void fec_rbd_clean(int last, struct fec_bd *prbd)
389 unsigned short flags = FEC_RBD_EMPTY;
391 flags |= FEC_RBD_WRAP;
392 writew(flags, &prbd->status);
393 writew(0, &prbd->data_length);
396 static int fec_get_hwaddr(int dev_id, unsigned char *mac)
398 imx_get_mac_from_fuse(dev_id, mac);
399 return !is_valid_ethaddr(mac);
402 static int fecmxc_set_hwaddr(struct udevice *dev)
404 struct fec_priv *fec = dev_get_priv(dev);
405 struct eth_pdata *pdata = dev_get_plat(dev);
406 uchar *mac = pdata->enetaddr;
408 writel(0, &fec->eth->iaddr1);
409 writel(0, &fec->eth->iaddr2);
410 writel(0, &fec->eth->gaddr1);
411 writel(0, &fec->eth->gaddr2);
413 /* Set physical address */
414 writel((mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3],
416 writel((mac[4] << 24) + (mac[5] << 16) + 0x8808, &fec->eth->paddr2);
421 /* Do initial configuration of the FEC registers */
422 static void fec_reg_setup(struct fec_priv *fec)
426 /* Set interrupt mask register */
427 writel(0x00000000, &fec->eth->imask);
429 /* Clear FEC-Lite interrupt event register(IEVENT) */
430 writel(0xffffffff, &fec->eth->ievent);
432 /* Set FEC-Lite receive control register(R_CNTRL): */
434 /* Start with frame length = 1518, common for all modes. */
435 rcntrl = PKTSIZE << FEC_RCNTRL_MAX_FL_SHIFT;
436 if (fec->xcv_type != SEVENWIRE) /* xMII modes */
437 rcntrl |= FEC_RCNTRL_FCE | FEC_RCNTRL_MII_MODE;
438 if (fec->xcv_type == RGMII)
439 rcntrl |= FEC_RCNTRL_RGMII;
440 else if (fec->xcv_type == RMII)
441 rcntrl |= FEC_RCNTRL_RMII;
446 writel(rcntrl, &fec->eth->r_cntrl);
450 * Start the FEC engine
451 * @param[in] dev Our device to handle
453 static int fec_open(struct udevice *dev)
455 struct fec_priv *fec = dev_get_priv(dev);
460 debug("fec_open: fec_open(dev)\n");
461 /* full-duplex, heartbeat disabled */
462 writel(1 << 2, &fec->eth->x_cntrl);
465 /* Invalidate all descriptors */
466 for (i = 0; i < FEC_RBD_NUM - 1; i++)
467 fec_rbd_clean(0, &fec->rbd_base[i]);
468 fec_rbd_clean(1, &fec->rbd_base[i]);
470 /* Flush the descriptors into RAM */
471 size = roundup(FEC_RBD_NUM * sizeof(struct fec_bd),
473 addr = (ulong)fec->rbd_base;
474 flush_dcache_range(addr, addr + size);
476 #ifdef FEC_QUIRK_ENET_MAC
477 /* Enable ENET HW endian SWAP */
478 writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_DBSWAP,
480 /* Enable ENET store and forward mode */
481 writel(readl(&fec->eth->x_wmrk) | FEC_X_WMRK_STRFWD,
484 /* Enable FEC-Lite controller */
485 writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_ETHER_EN,
488 #ifdef FEC_ENET_ENABLE_TXC_DELAY
489 writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_TXC_DLY,
493 #ifdef FEC_ENET_ENABLE_RXC_DELAY
494 writel(readl(&fec->eth->ecntrl) | FEC_ECNTRL_RXC_DLY,
498 #if defined(CONFIG_MX53) || defined(CONFIG_MX6SL)
501 /* setup the MII gasket for RMII mode */
502 /* disable the gasket */
503 writew(0, &fec->eth->miigsk_enr);
505 /* wait for the gasket to be disabled */
506 while (readw(&fec->eth->miigsk_enr) & MIIGSK_ENR_READY)
509 /* configure gasket for RMII, 50 MHz, no loopback, and no echo */
510 writew(MIIGSK_CFGR_IF_MODE_RMII, &fec->eth->miigsk_cfgr);
512 /* re-enable the gasket */
513 writew(MIIGSK_ENR_EN, &fec->eth->miigsk_enr);
515 /* wait until MII gasket is ready */
517 while ((readw(&fec->eth->miigsk_enr) & MIIGSK_ENR_READY) == 0) {
518 if (--max_loops <= 0) {
519 printf("WAIT for MII Gasket ready timed out\n");
527 /* Start up the PHY */
528 int ret = phy_startup(fec->phydev);
531 printf("Could not initialize PHY %s\n",
532 fec->phydev->dev->name);
535 speed = fec->phydev->speed;
538 miiphy_wait_aneg(edev);
539 speed = miiphy_speed(edev->name, fec->phy_id);
540 miiphy_duplex(edev->name, fec->phy_id);
543 #ifdef FEC_QUIRK_ENET_MAC
545 u32 ecr = readl(&fec->eth->ecntrl) & ~FEC_ECNTRL_SPEED;
546 u32 rcr = readl(&fec->eth->r_cntrl) & ~FEC_RCNTRL_RMII_10T;
547 if (speed == _1000BASET)
548 ecr |= FEC_ECNTRL_SPEED;
549 else if (speed != _100BASET)
550 rcr |= FEC_RCNTRL_RMII_10T;
551 writel(ecr, &fec->eth->ecntrl);
552 writel(rcr, &fec->eth->r_cntrl);
555 debug("%s:Speed=%i\n", __func__, speed);
557 /* Enable SmartDMA receive task */
558 fec_rx_task_enable(fec);
564 static int fecmxc_init(struct udevice *dev)
566 struct fec_priv *fec = dev_get_priv(dev);
567 u8 *mib_ptr = (uint8_t *)&fec->eth->rmon_t_drop;
571 /* Initialize MAC address */
572 fecmxc_set_hwaddr(dev);
574 /* Setup transmit descriptors, there are two in total. */
577 /* Setup receive descriptors. */
578 fec_rbd_init(fec, FEC_RBD_NUM, FEC_MAX_PKT_SIZE);
582 if (fec->xcv_type != SEVENWIRE)
583 fec_mii_setspeed(fec->bus->priv);
585 /* Set Opcode/Pause Duration Register */
586 writel(0x00010020, &fec->eth->op_pause); /* FIXME 0xffff0020; */
587 writel(0x2, &fec->eth->x_wmrk);
589 /* Set multicast address filter */
590 writel(0x00000000, &fec->eth->gaddr1);
591 writel(0x00000000, &fec->eth->gaddr2);
593 /* Do not access reserved register */
594 if (!is_mx6ul() && !is_mx6ull() && !is_imx8() && !is_imx8m() && !is_imx8ulp() &&
597 for (i = mib_ptr; i <= mib_ptr + 0xfc; i += 4)
600 /* FIFO receive start register */
601 writel(0x520, &fec->eth->r_fstart);
604 /* size and address of each buffer */
605 writel(FEC_MAX_PKT_SIZE, &fec->eth->emrbr);
607 addr = (ulong)fec->tbd_base;
608 writel((uint32_t)addr, &fec->eth->etdsr);
610 addr = (ulong)fec->rbd_base;
611 writel((uint32_t)addr, &fec->eth->erdsr);
613 #ifndef CONFIG_PHYLIB
614 if (fec->xcv_type != SEVENWIRE)
615 miiphy_restart_aneg(dev);
622 * Halt the FEC engine
623 * @param[in] dev Our device to handle
625 static void fecmxc_halt(struct udevice *dev)
627 struct fec_priv *fec = dev_get_priv(dev);
628 int counter = 0xffff;
630 /* issue graceful stop command to the FEC transmitter if necessary */
631 writel(FEC_TCNTRL_GTS | readl(&fec->eth->x_cntrl),
634 debug("eth_halt: wait for stop regs\n");
635 /* wait for graceful stop to register */
636 while ((counter--) && (!(readl(&fec->eth->ievent) & FEC_IEVENT_GRA)))
639 /* Disable SmartDMA tasks */
640 fec_tx_task_disable(fec);
641 fec_rx_task_disable(fec);
644 * Disable the Ethernet Controller
645 * Note: this will also reset the BD index counter!
647 writel(readl(&fec->eth->ecntrl) & ~FEC_ECNTRL_ETHER_EN,
651 debug("eth_halt: done\n");
656 * @param[in] dev Our ethernet device to handle
657 * @param[in] packet Pointer to the data to be transmitted
658 * @param[in] length Data count in bytes
659 * Return: 0 on success
661 static int fecmxc_send(struct udevice *dev, void *packet, int length)
666 int timeout = FEC_XFER_TIMEOUT;
670 * This routine transmits one frame. This routine only accepts
671 * 6-byte Ethernet addresses.
673 struct fec_priv *fec = dev_get_priv(dev);
676 * Check for valid length of data.
678 if ((length > 1500) || (length <= 0)) {
679 printf("Payload (%d) too large\n", length);
684 * Setup the transmit buffer. We are always using the first buffer for
685 * transmission, the second will be empty and only used to stop the DMA
686 * engine. We also flush the packet to RAM here to avoid cache trouble.
688 #ifdef CONFIG_FEC_MXC_SWAP_PACKET
689 swap_packet((uint32_t *)packet, length);
692 addr = (ulong)packet;
693 end = roundup(addr + length, ARCH_DMA_MINALIGN);
694 addr &= ~(ARCH_DMA_MINALIGN - 1);
695 flush_dcache_range(addr, end);
697 writew(length, &fec->tbd_base[fec->tbd_index].data_length);
698 writel((uint32_t)addr, &fec->tbd_base[fec->tbd_index].data_pointer);
701 * update BD's status now
703 * - is always the last in a chain (means no chain)
704 * - should transmitt the CRC
705 * - might be the last BD in the list, so the address counter should
706 * wrap (-> keep the WRAP flag)
708 status = readw(&fec->tbd_base[fec->tbd_index].status) & FEC_TBD_WRAP;
709 status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
710 writew(status, &fec->tbd_base[fec->tbd_index].status);
713 * Flush data cache. This code flushes both TX descriptors to RAM.
714 * After this code, the descriptors will be safely in RAM and we
717 size = roundup(2 * sizeof(struct fec_bd), ARCH_DMA_MINALIGN);
718 addr = (ulong)fec->tbd_base;
719 flush_dcache_range(addr, addr + size);
722 * Below we read the DMA descriptor's last four bytes back from the
723 * DRAM. This is important in order to make sure that all WRITE
724 * operations on the bus that were triggered by previous cache FLUSH
727 * Otherwise, on MX28, it is possible to observe a corruption of the
728 * DMA descriptors. Please refer to schematic "Figure 1-2" in MX28RM
729 * for the bus structure of MX28. The scenario is as follows:
731 * 1) ARM core triggers a series of WRITEs on the AHB_ARB2 bus going
732 * to DRAM due to flush_dcache_range()
733 * 2) ARM core writes the FEC registers via AHB_ARB2
734 * 3) FEC DMA starts reading/writing from/to DRAM via AHB_ARB3
736 * Note that 2) does sometimes finish before 1) due to reordering of
737 * WRITE accesses on the AHB bus, therefore triggering 3) before the
738 * DMA descriptor is fully written into DRAM. This results in occasional
739 * corruption of the DMA descriptor.
741 readl(addr + size - 4);
743 /* Enable SmartDMA transmit task */
744 fec_tx_task_enable(fec);
747 * Wait until frame is sent. On each turn of the wait cycle, we must
748 * invalidate data cache to see what's really in RAM. Also, we need
752 if (!(readl(&fec->eth->x_des_active) & FEC_X_DES_ACTIVE_TDAR))
762 * The TDAR bit is cleared when the descriptors are all out from TX
763 * but on mx6solox we noticed that the READY bit is still not cleared
765 * These are two distinct signals, and in IC simulation, we found that
766 * TDAR always gets cleared prior than the READY bit of last BD becomes
768 * In mx6solox, we use a later version of FEC IP. It looks like that
769 * this intrinsic behaviour of TDAR bit has changed in this newer FEC
772 * Fix this by polling the READY bit of BD after the TDAR polling,
773 * which covers the mx6solox case and does not harm the other SoCs.
775 timeout = FEC_XFER_TIMEOUT;
777 invalidate_dcache_range(addr, addr + size);
778 if (!(readw(&fec->tbd_base[fec->tbd_index].status) &
787 debug("fec_send: status 0x%x index %d ret %i\n",
788 readw(&fec->tbd_base[fec->tbd_index].status),
789 fec->tbd_index, ret);
790 /* for next transmission use the other buffer */
800 * Pull one frame from the card
801 * @param[in] dev Our ethernet device to handle
802 * Return: Length of packet read
804 static int fecmxc_recv(struct udevice *dev, int flags, uchar **packetp)
806 struct fec_priv *fec = dev_get_priv(dev);
807 struct fec_bd *rbd = &fec->rbd_base[fec->rbd_index];
808 unsigned long ievent;
809 int frame_length, len = 0;
811 ulong addr, size, end;
814 *packetp = memalign(ARCH_DMA_MINALIGN, FEC_MAX_PKT_SIZE);
816 printf("%s: error allocating packetp\n", __func__);
820 /* Check if any critical events have happened */
821 ievent = readl(&fec->eth->ievent);
822 writel(ievent, &fec->eth->ievent);
823 debug("fec_recv: ievent 0x%lx\n", ievent);
824 if (ievent & FEC_IEVENT_BABR) {
827 printf("some error: 0x%08lx\n", ievent);
830 if (ievent & FEC_IEVENT_HBERR) {
831 /* Heartbeat error */
832 writel(0x00000001 | readl(&fec->eth->x_cntrl),
835 if (ievent & FEC_IEVENT_GRA) {
836 /* Graceful stop complete */
837 if (readl(&fec->eth->x_cntrl) & 0x00000001) {
839 writel(~0x00000001 & readl(&fec->eth->x_cntrl),
846 * Read the buffer status. Before the status can be read, the data cache
847 * must be invalidated, because the data in RAM might have been changed
848 * by DMA. The descriptors are properly aligned to cachelines so there's
849 * no need to worry they'd overlap.
851 * WARNING: By invalidating the descriptor here, we also invalidate
852 * the descriptors surrounding this one. Therefore we can NOT change the
853 * contents of this descriptor nor the surrounding ones. The problem is
854 * that in order to mark the descriptor as processed, we need to change
855 * the descriptor. The solution is to mark the whole cache line when all
856 * descriptors in the cache line are processed.
859 addr &= ~(ARCH_DMA_MINALIGN - 1);
860 size = roundup(sizeof(struct fec_bd), ARCH_DMA_MINALIGN);
861 invalidate_dcache_range(addr, addr + size);
863 bd_status = readw(&rbd->status);
864 debug("fec_recv: status 0x%x\n", bd_status);
866 if (!(bd_status & FEC_RBD_EMPTY)) {
867 if ((bd_status & FEC_RBD_LAST) && !(bd_status & FEC_RBD_ERR) &&
868 ((readw(&rbd->data_length) - 4) > 14)) {
869 /* Get buffer address and size */
870 addr = readl(&rbd->data_pointer);
871 frame_length = readw(&rbd->data_length) - 4;
872 /* Invalidate data cache over the buffer */
873 end = roundup(addr + frame_length, ARCH_DMA_MINALIGN);
874 addr &= ~(ARCH_DMA_MINALIGN - 1);
875 invalidate_dcache_range(addr, end);
877 /* Fill the buffer and pass it to upper layers */
878 #ifdef CONFIG_FEC_MXC_SWAP_PACKET
879 swap_packet((uint32_t *)addr, frame_length);
882 memcpy(*packetp, (char *)addr, frame_length);
885 if (bd_status & FEC_RBD_ERR)
886 debug("error frame: 0x%08lx 0x%08x\n",
891 * Free the current buffer, restart the engine and move forward
892 * to the next buffer. Here we check if the whole cacheline of
893 * descriptors was already processed and if so, we mark it free
896 size = RXDESC_PER_CACHELINE - 1;
897 if ((fec->rbd_index & size) == size) {
898 i = fec->rbd_index - size;
899 addr = (ulong)&fec->rbd_base[i];
900 for (; i <= fec->rbd_index ; i++) {
901 fec_rbd_clean(i == (FEC_RBD_NUM - 1),
904 flush_dcache_range(addr,
905 addr + ARCH_DMA_MINALIGN);
908 fec_rx_task_enable(fec);
909 fec->rbd_index = (fec->rbd_index + 1) % FEC_RBD_NUM;
911 debug("fec_recv: stop\n");
916 static void fec_set_dev_name(char *dest, int dev_id)
918 sprintf(dest, (dev_id == -1) ? "FEC" : "FEC%i", dev_id);
921 static int fec_alloc_descs(struct fec_priv *fec)
928 /* Allocate TX descriptors. */
929 size = roundup(2 * sizeof(struct fec_bd), ARCH_DMA_MINALIGN);
930 fec->tbd_base = memalign(ARCH_DMA_MINALIGN, size);
934 /* Allocate RX descriptors. */
935 size = roundup(FEC_RBD_NUM * sizeof(struct fec_bd), ARCH_DMA_MINALIGN);
936 fec->rbd_base = memalign(ARCH_DMA_MINALIGN, size);
940 memset(fec->rbd_base, 0, size);
942 /* Allocate RX buffers. */
944 /* Maximum RX buffer size. */
945 size = roundup(FEC_MAX_PKT_SIZE, FEC_DMA_RX_MINALIGN);
946 for (i = 0; i < FEC_RBD_NUM; i++) {
947 data = memalign(FEC_DMA_RX_MINALIGN, size);
949 printf("%s: error allocating rxbuf %d\n", __func__, i);
953 memset(data, 0, size);
956 fec->rbd_base[i].data_pointer = (uint32_t)addr;
957 fec->rbd_base[i].status = FEC_RBD_EMPTY;
958 fec->rbd_base[i].data_length = 0;
959 /* Flush the buffer to memory. */
960 flush_dcache_range(addr, addr + size);
963 /* Mark the last RBD to close the ring. */
964 fec->rbd_base[i - 1].status = FEC_RBD_WRAP | FEC_RBD_EMPTY;
972 for (; i >= 0; i--) {
973 addr = fec->rbd_base[i].data_pointer;
983 static void fec_free_descs(struct fec_priv *fec)
988 for (i = 0; i < FEC_RBD_NUM; i++) {
989 addr = fec->rbd_base[i].data_pointer;
996 struct mii_dev *fec_get_miibus(ulong base_addr, int dev_id)
998 struct ethernet_regs *eth = (struct ethernet_regs *)base_addr;
1004 printf("mdio_alloc failed\n");
1007 bus->read = fec_phy_read;
1008 bus->write = fec_phy_write;
1010 fec_set_dev_name(bus->name, dev_id);
1012 ret = mdio_register(bus);
1014 printf("mdio_register failed\n");
1018 fec_mii_setspeed(eth);
1022 static int fecmxc_read_rom_hwaddr(struct udevice *dev)
1024 struct fec_priv *priv = dev_get_priv(dev);
1025 struct eth_pdata *pdata = dev_get_plat(dev);
1027 return fec_get_hwaddr(priv->dev_id, pdata->enetaddr);
1030 static int fecmxc_set_promisc(struct udevice *dev, bool enable)
1032 struct fec_priv *priv = dev_get_priv(dev);
1034 priv->promisc = enable;
1039 static int fecmxc_free_pkt(struct udevice *dev, uchar *packet, int length)
1047 static const struct eth_ops fecmxc_ops = {
1048 .start = fecmxc_init,
1049 .send = fecmxc_send,
1050 .recv = fecmxc_recv,
1051 .free_pkt = fecmxc_free_pkt,
1052 .stop = fecmxc_halt,
1053 .write_hwaddr = fecmxc_set_hwaddr,
1054 .read_rom_hwaddr = fecmxc_read_rom_hwaddr,
1055 .set_promisc = fecmxc_set_promisc,
1058 static int device_get_phy_addr(struct fec_priv *priv, struct udevice *dev)
1060 struct ofnode_phandle_args phandle_args;
1063 ret = dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
1066 priv->phy_of_node = ofnode_find_subnode(dev_ofnode(dev),
1068 if (ofnode_valid(priv->phy_of_node))
1070 debug("Failed to find phy-handle (err = %d)\n", ret);
1074 if (!ofnode_is_enabled(phandle_args.node))
1077 priv->phy_of_node = phandle_args.node;
1078 reg = ofnode_read_u32_default(phandle_args.node, "reg", 0);
1083 static int fec_phy_init(struct fec_priv *priv, struct udevice *dev)
1085 struct phy_device *phydev;
1088 addr = device_get_phy_addr(priv, dev);
1089 #ifdef CONFIG_FEC_MXC_PHYADDR
1090 addr = CONFIG_FEC_MXC_PHYADDR;
1093 phydev = phy_connect(priv->bus, addr, dev, priv->interface);
1097 priv->phydev = phydev;
1098 priv->phydev->node = priv->phy_of_node;
1104 #if CONFIG_IS_ENABLED(DM_GPIO)
1105 /* FEC GPIO reset */
1106 static void fec_gpio_reset(struct fec_priv *priv)
1108 debug("fec_gpio_reset: fec_gpio_reset(dev)\n");
1109 if (dm_gpio_is_valid(&priv->phy_reset_gpio)) {
1110 dm_gpio_set_value(&priv->phy_reset_gpio, 1);
1111 mdelay(priv->reset_delay);
1112 dm_gpio_set_value(&priv->phy_reset_gpio, 0);
1113 if (priv->reset_post_delay)
1114 mdelay(priv->reset_post_delay);
1119 static int fecmxc_probe(struct udevice *dev)
1121 bool dm_mii_bus = true;
1122 struct eth_pdata *pdata = dev_get_plat(dev);
1123 struct fec_priv *priv = dev_get_priv(dev);
1124 struct mii_dev *bus = NULL;
1128 if (CONFIG_IS_ENABLED(IMX_MODULE_FUSE)) {
1129 if (enet_fused((ulong)priv->eth)) {
1130 printf("SoC fuse indicates Ethernet@0x%lx is unavailable.\n", (ulong)priv->eth);
1135 if (IS_ENABLED(CONFIG_IMX8)) {
1136 ret = clk_get_by_name(dev, "ipg", &priv->ipg_clk);
1138 debug("Can't get FEC ipg clk: %d\n", ret);
1141 ret = clk_enable(&priv->ipg_clk);
1143 debug("Can't enable FEC ipg clk: %d\n", ret);
1147 priv->clk_rate = clk_get_rate(&priv->ipg_clk);
1148 } else if (CONFIG_IS_ENABLED(CLK_CCF)) {
1149 ret = clk_get_by_name(dev, "ipg", &priv->ipg_clk);
1151 debug("Can't get FEC ipg clk: %d\n", ret);
1154 ret = clk_enable(&priv->ipg_clk);
1158 ret = clk_get_by_name(dev, "ahb", &priv->ahb_clk);
1160 debug("Can't get FEC ahb clk: %d\n", ret);
1163 ret = clk_enable(&priv->ahb_clk);
1167 ret = clk_get_by_name(dev, "enet_out", &priv->clk_enet_out);
1169 ret = clk_enable(&priv->clk_enet_out);
1174 ret = clk_get_by_name(dev, "enet_clk_ref", &priv->clk_ref);
1176 ret = clk_enable(&priv->clk_ref);
1181 ret = clk_get_by_name(dev, "ptp", &priv->clk_ptp);
1183 ret = clk_enable(&priv->clk_ptp);
1188 priv->clk_rate = clk_get_rate(&priv->ipg_clk);
1191 ret = fec_alloc_descs(priv);
1195 #ifdef CONFIG_DM_REGULATOR
1196 if (priv->phy_supply) {
1197 ret = regulator_set_enable(priv->phy_supply, true);
1199 printf("%s: Error enabling phy supply\n", dev->name);
1205 #if CONFIG_IS_ENABLED(DM_GPIO)
1206 fec_gpio_reset(priv);
1209 writel(readl(&priv->eth->ecntrl) | FEC_ECNTRL_RESET,
1210 &priv->eth->ecntrl);
1211 start = get_timer(0);
1212 while (readl(&priv->eth->ecntrl) & FEC_ECNTRL_RESET) {
1213 if (get_timer(start) > (CONFIG_SYS_HZ * 5)) {
1214 printf("FEC MXC: Timeout resetting chip\n");
1220 fec_reg_setup(priv);
1222 priv->dev_id = dev_seq(dev);
1224 #ifdef CONFIG_DM_ETH_PHY
1225 bus = eth_phy_get_mdio_bus(dev);
1230 #ifdef CONFIG_FEC_MXC_MDIO_BASE
1231 bus = fec_get_miibus((ulong)CONFIG_FEC_MXC_MDIO_BASE,
1234 bus = fec_get_miibus((ulong)priv->eth, dev_seq(dev));
1242 #ifdef CONFIG_DM_ETH_PHY
1243 eth_phy_set_mdio_bus(dev, bus);
1247 priv->interface = pdata->phy_interface;
1248 switch (priv->interface) {
1249 case PHY_INTERFACE_MODE_MII:
1250 priv->xcv_type = MII100;
1252 case PHY_INTERFACE_MODE_RMII:
1253 priv->xcv_type = RMII;
1255 case PHY_INTERFACE_MODE_RGMII:
1256 case PHY_INTERFACE_MODE_RGMII_ID:
1257 case PHY_INTERFACE_MODE_RGMII_RXID:
1258 case PHY_INTERFACE_MODE_RGMII_TXID:
1259 priv->xcv_type = RGMII;
1262 priv->xcv_type = MII100;
1263 printf("Unsupported interface type %d defaulting to MII100\n",
1268 ret = fec_phy_init(priv, dev);
1276 mdio_unregister(bus);
1281 fec_free_descs(priv);
1285 static int fecmxc_remove(struct udevice *dev)
1287 struct fec_priv *priv = dev_get_priv(dev);
1290 fec_free_descs(priv);
1291 mdio_unregister(priv->bus);
1292 mdio_free(priv->bus);
1294 #ifdef CONFIG_DM_REGULATOR
1295 if (priv->phy_supply)
1296 regulator_set_enable(priv->phy_supply, false);
1302 static int fecmxc_of_to_plat(struct udevice *dev)
1305 struct eth_pdata *pdata = dev_get_plat(dev);
1306 struct fec_priv *priv = dev_get_priv(dev);
1308 pdata->iobase = dev_read_addr(dev);
1309 priv->eth = (struct ethernet_regs *)pdata->iobase;
1311 pdata->phy_interface = dev_read_phy_mode(dev);
1312 if (pdata->phy_interface == PHY_INTERFACE_MODE_NA)
1315 #ifdef CONFIG_DM_REGULATOR
1316 device_get_supply_regulator(dev, "phy-supply", &priv->phy_supply);
1319 #if CONFIG_IS_ENABLED(DM_GPIO)
1320 ret = gpio_request_by_name(dev, "phy-reset-gpios", 0,
1321 &priv->phy_reset_gpio, GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
1323 return 0; /* property is optional, don't return error! */
1325 priv->reset_delay = dev_read_u32_default(dev, "phy-reset-duration", 1);
1326 if (priv->reset_delay > 1000) {
1327 printf("FEC MXC: phy reset duration should be <= 1000ms\n");
1328 /* property value wrong, use default value */
1329 priv->reset_delay = 1;
1332 priv->reset_post_delay = dev_read_u32_default(dev,
1333 "phy-reset-post-delay",
1335 if (priv->reset_post_delay > 1000) {
1336 printf("FEC MXC: phy reset post delay should be <= 1000ms\n");
1337 /* property value wrong, use default value */
1338 priv->reset_post_delay = 0;
1345 static const struct udevice_id fecmxc_ids[] = {
1346 { .compatible = "fsl,imx28-fec" },
1347 { .compatible = "fsl,imx6q-fec" },
1348 { .compatible = "fsl,imx6sl-fec" },
1349 { .compatible = "fsl,imx6sx-fec" },
1350 { .compatible = "fsl,imx6ul-fec" },
1351 { .compatible = "fsl,imx53-fec" },
1352 { .compatible = "fsl,imx7d-fec" },
1353 { .compatible = "fsl,mvf600-fec" },
1354 { .compatible = "fsl,imx93-fec" },
1358 U_BOOT_DRIVER(fecmxc_gem) = {
1361 .of_match = fecmxc_ids,
1362 .of_to_plat = fecmxc_of_to_plat,
1363 .probe = fecmxc_probe,
1364 .remove = fecmxc_remove,
1366 .priv_auto = sizeof(struct fec_priv),
1367 .plat_auto = sizeof(struct eth_pdata),