1 // SPDX-License-Identifier: GPL-2.0+
4 * Author: Amit Singh Tomar, amittomer25@gmail.com
6 * Ethernet driver for H3/A64/A83T based SoC's
8 * It is derived from the work done by
9 * LABBE Corentin & Chen-Yu Tsai for Linux, THANKS!
15 #include <asm/cache.h>
17 #include <asm/arch/clock.h>
18 #include <asm/arch/gpio.h>
22 #include <fdt_support.h>
23 #include <dm/device_compat.h>
24 #include <linux/delay.h>
25 #include <linux/err.h>
30 #include <dt-bindings/pinctrl/sun4i-a10.h>
31 #if CONFIG_IS_ENABLED(DM_GPIO)
32 #include <asm-generic/gpio.h>
35 #define MDIO_CMD_MII_BUSY BIT(0)
36 #define MDIO_CMD_MII_WRITE BIT(1)
38 #define MDIO_CMD_MII_PHY_REG_ADDR_MASK 0x000001f0
39 #define MDIO_CMD_MII_PHY_REG_ADDR_SHIFT 4
40 #define MDIO_CMD_MII_PHY_ADDR_MASK 0x0001f000
41 #define MDIO_CMD_MII_PHY_ADDR_SHIFT 12
43 #define CONFIG_TX_DESCR_NUM 32
44 #define CONFIG_RX_DESCR_NUM 32
45 #define CONFIG_ETH_BUFSIZE 2048 /* Note must be dma aligned */
48 * The datasheet says that each descriptor can transfers up to 4096 bytes
49 * But later, the register documentation reduces that value to 2048,
50 * using 2048 cause strange behaviours and even BSP driver use 2047
52 #define CONFIG_ETH_RXSIZE 2044 /* Note must fit in ETH_BUFSIZE */
54 #define TX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_TX_DESCR_NUM)
55 #define RX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_RX_DESCR_NUM)
57 #define H3_EPHY_DEFAULT_VALUE 0x58000
58 #define H3_EPHY_DEFAULT_MASK GENMASK(31, 15)
59 #define H3_EPHY_ADDR_SHIFT 20
60 #define REG_PHY_ADDR_MASK GENMASK(4, 0)
61 #define H3_EPHY_LED_POL BIT(17) /* 1: active low, 0: active high */
62 #define H3_EPHY_SHUTDOWN BIT(16) /* 1: shutdown, 0: power up */
63 #define H3_EPHY_SELECT BIT(15) /* 1: internal PHY, 0: external PHY */
65 #define SC_RMII_EN BIT(13)
66 #define SC_EPIT BIT(2) /* 1: RGMII, 0: MII */
67 #define SC_ETCS_MASK GENMASK(1, 0)
68 #define SC_ETCS_EXT_GMII 0x1
69 #define SC_ETCS_INT_GMII 0x2
70 #define SC_ETXDC_MASK GENMASK(12, 10)
71 #define SC_ETXDC_OFFSET 10
72 #define SC_ERXDC_MASK GENMASK(9, 5)
73 #define SC_ERXDC_OFFSET 5
75 #define CONFIG_MDIO_TIMEOUT (3 * CONFIG_SYS_HZ)
77 #define AHB_GATE_OFFSET_EPHY 0
80 #define SUN8I_IOMUX_H3 2
81 #define SUN8I_IOMUX_R40 5
84 /* H3/A64 EMAC Register's offset */
85 #define EMAC_CTL0 0x00
86 #define EMAC_CTL1 0x04
87 #define EMAC_INT_STA 0x08
88 #define EMAC_INT_EN 0x0c
89 #define EMAC_TX_CTL0 0x10
90 #define EMAC_TX_CTL1 0x14
91 #define EMAC_TX_FLOW_CTL 0x1c
92 #define EMAC_TX_DMA_DESC 0x20
93 #define EMAC_RX_CTL0 0x24
94 #define EMAC_RX_CTL1 0x28
95 #define EMAC_RX_DMA_DESC 0x34
96 #define EMAC_MII_CMD 0x48
97 #define EMAC_MII_DATA 0x4c
98 #define EMAC_ADDR0_HIGH 0x50
99 #define EMAC_ADDR0_LOW 0x54
100 #define EMAC_TX_DMA_STA 0xb0
101 #define EMAC_TX_CUR_DESC 0xb4
102 #define EMAC_TX_CUR_BUF 0xb8
103 #define EMAC_RX_DMA_STA 0xc0
104 #define EMAC_RX_CUR_DESC 0xc4
106 DECLARE_GLOBAL_DATA_PTR;
115 struct emac_dma_desc {
120 } __aligned(ARCH_DMA_MINALIGN);
122 struct emac_eth_dev {
123 struct emac_dma_desc rx_chain[CONFIG_TX_DESCR_NUM];
124 struct emac_dma_desc tx_chain[CONFIG_RX_DESCR_NUM];
125 char rxbuffer[RX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
126 char txbuffer[TX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
138 bool use_internal_phy;
140 enum emac_variant variant;
142 phys_addr_t sysctl_reg;
143 struct phy_device *phydev;
147 struct reset_ctl tx_rst;
148 struct reset_ctl ephy_rst;
149 #if CONFIG_IS_ENABLED(DM_GPIO)
150 struct gpio_desc reset_gpio;
155 struct sun8i_eth_pdata {
156 struct eth_pdata eth_pdata;
163 static int sun8i_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
165 struct udevice *dev = bus->priv;
166 struct emac_eth_dev *priv = dev_get_priv(dev);
169 int timeout = CONFIG_MDIO_TIMEOUT;
171 miiaddr &= ~MDIO_CMD_MII_WRITE;
172 miiaddr &= ~MDIO_CMD_MII_PHY_REG_ADDR_MASK;
173 miiaddr |= (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) &
174 MDIO_CMD_MII_PHY_REG_ADDR_MASK;
176 miiaddr &= ~MDIO_CMD_MII_PHY_ADDR_MASK;
178 miiaddr |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) &
179 MDIO_CMD_MII_PHY_ADDR_MASK;
181 miiaddr |= MDIO_CMD_MII_BUSY;
183 writel(miiaddr, priv->mac_reg + EMAC_MII_CMD);
185 start = get_timer(0);
186 while (get_timer(start) < timeout) {
187 if (!(readl(priv->mac_reg + EMAC_MII_CMD) & MDIO_CMD_MII_BUSY))
188 return readl(priv->mac_reg + EMAC_MII_DATA);
195 static int sun8i_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
198 struct udevice *dev = bus->priv;
199 struct emac_eth_dev *priv = dev_get_priv(dev);
202 int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
204 miiaddr &= ~MDIO_CMD_MII_PHY_REG_ADDR_MASK;
205 miiaddr |= (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) &
206 MDIO_CMD_MII_PHY_REG_ADDR_MASK;
208 miiaddr &= ~MDIO_CMD_MII_PHY_ADDR_MASK;
209 miiaddr |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) &
210 MDIO_CMD_MII_PHY_ADDR_MASK;
212 miiaddr |= MDIO_CMD_MII_WRITE;
213 miiaddr |= MDIO_CMD_MII_BUSY;
215 writel(val, priv->mac_reg + EMAC_MII_DATA);
216 writel(miiaddr, priv->mac_reg + EMAC_MII_CMD);
218 start = get_timer(0);
219 while (get_timer(start) < timeout) {
220 if (!(readl(priv->mac_reg + EMAC_MII_CMD) &
221 MDIO_CMD_MII_BUSY)) {
231 static int _sun8i_write_hwaddr(struct emac_eth_dev *priv, u8 *mac_id)
233 u32 macid_lo, macid_hi;
235 macid_lo = mac_id[0] + (mac_id[1] << 8) + (mac_id[2] << 16) +
237 macid_hi = mac_id[4] + (mac_id[5] << 8);
239 writel(macid_hi, priv->mac_reg + EMAC_ADDR0_HIGH);
240 writel(macid_lo, priv->mac_reg + EMAC_ADDR0_LOW);
245 static void sun8i_adjust_link(struct emac_eth_dev *priv,
246 struct phy_device *phydev)
250 v = readl(priv->mac_reg + EMAC_CTL0);
259 switch (phydev->speed) {
270 writel(v, priv->mac_reg + EMAC_CTL0);
273 static int sun8i_emac_set_syscon_ephy(struct emac_eth_dev *priv, u32 *reg)
275 if (priv->use_internal_phy) {
276 /* H3 based SoC's that has an Internal 100MBit PHY
277 * needs to be configured and powered up before use
279 *reg &= ~H3_EPHY_DEFAULT_MASK;
280 *reg |= H3_EPHY_DEFAULT_VALUE;
281 *reg |= priv->phyaddr << H3_EPHY_ADDR_SHIFT;
282 *reg &= ~H3_EPHY_SHUTDOWN;
283 *reg |= H3_EPHY_SELECT;
285 /* This is to select External Gigabit PHY on
286 * the boards with H3 SoC.
288 *reg &= ~H3_EPHY_SELECT;
293 static int sun8i_emac_set_syscon(struct sun8i_eth_pdata *pdata,
294 struct emac_eth_dev *priv)
299 if (priv->variant == R40_GMAC) {
300 /* Select RGMII for R40 */
301 reg = readl(priv->sysctl_reg + 0x164);
302 reg |= CCM_GMAC_CTRL_TX_CLK_SRC_INT_RGMII |
303 CCM_GMAC_CTRL_GPIT_RGMII |
304 CCM_GMAC_CTRL_TX_CLK_DELAY(CONFIG_GMAC_TX_DELAY);
306 writel(reg, priv->sysctl_reg + 0x164);
310 reg = readl(priv->sysctl_reg + 0x30);
312 if (priv->variant == H3_EMAC) {
313 ret = sun8i_emac_set_syscon_ephy(priv, ®);
318 reg &= ~(SC_ETCS_MASK | SC_EPIT);
319 if (priv->variant == H3_EMAC || priv->variant == A64_EMAC)
322 switch (priv->interface) {
323 case PHY_INTERFACE_MODE_MII:
326 case PHY_INTERFACE_MODE_RGMII:
327 reg |= SC_EPIT | SC_ETCS_INT_GMII;
329 case PHY_INTERFACE_MODE_RMII:
330 if (priv->variant == H3_EMAC ||
331 priv->variant == A64_EMAC) {
332 reg |= SC_RMII_EN | SC_ETCS_EXT_GMII;
335 /* RMII not supported on A83T */
337 debug("%s: Invalid PHY interface\n", __func__);
341 if (pdata->tx_delay_ps)
342 reg |= ((pdata->tx_delay_ps / 100) << SC_ETXDC_OFFSET)
345 if (pdata->rx_delay_ps)
346 reg |= ((pdata->rx_delay_ps / 100) << SC_ERXDC_OFFSET)
349 writel(reg, priv->sysctl_reg + 0x30);
354 static int sun8i_phy_init(struct emac_eth_dev *priv, void *dev)
356 struct phy_device *phydev;
358 phydev = phy_connect(priv->bus, priv->phyaddr, dev, priv->interface);
362 phy_connect_dev(phydev, dev);
364 priv->phydev = phydev;
365 phy_config(priv->phydev);
370 static void rx_descs_init(struct emac_eth_dev *priv)
372 struct emac_dma_desc *desc_table_p = &priv->rx_chain[0];
373 char *rxbuffs = &priv->rxbuffer[0];
374 struct emac_dma_desc *desc_p;
377 /* flush Rx buffers */
378 flush_dcache_range((uintptr_t)rxbuffs, (ulong)rxbuffs +
381 for (idx = 0; idx < CONFIG_RX_DESCR_NUM; idx++) {
382 desc_p = &desc_table_p[idx];
383 desc_p->buf_addr = (uintptr_t)&rxbuffs[idx * CONFIG_ETH_BUFSIZE]
385 desc_p->next = (uintptr_t)&desc_table_p[idx + 1];
386 desc_p->st |= CONFIG_ETH_RXSIZE;
387 desc_p->status = BIT(31);
390 /* Correcting the last pointer of the chain */
391 desc_p->next = (uintptr_t)&desc_table_p[0];
393 flush_dcache_range((uintptr_t)priv->rx_chain,
394 (uintptr_t)priv->rx_chain +
395 sizeof(priv->rx_chain));
397 writel((uintptr_t)&desc_table_p[0], (priv->mac_reg + EMAC_RX_DMA_DESC));
398 priv->rx_currdescnum = 0;
401 static void tx_descs_init(struct emac_eth_dev *priv)
403 struct emac_dma_desc *desc_table_p = &priv->tx_chain[0];
404 char *txbuffs = &priv->txbuffer[0];
405 struct emac_dma_desc *desc_p;
408 for (idx = 0; idx < CONFIG_TX_DESCR_NUM; idx++) {
409 desc_p = &desc_table_p[idx];
410 desc_p->buf_addr = (uintptr_t)&txbuffs[idx * CONFIG_ETH_BUFSIZE]
412 desc_p->next = (uintptr_t)&desc_table_p[idx + 1];
413 desc_p->status = (1 << 31);
417 /* Correcting the last pointer of the chain */
418 desc_p->next = (uintptr_t)&desc_table_p[0];
420 /* Flush all Tx buffer descriptors */
421 flush_dcache_range((uintptr_t)priv->tx_chain,
422 (uintptr_t)priv->tx_chain +
423 sizeof(priv->tx_chain));
425 writel((uintptr_t)&desc_table_p[0], priv->mac_reg + EMAC_TX_DMA_DESC);
426 priv->tx_currdescnum = 0;
429 static int _sun8i_emac_eth_init(struct emac_eth_dev *priv, u8 *enetaddr)
434 reg = readl((priv->mac_reg + EMAC_CTL1));
438 setbits_le32((priv->mac_reg + EMAC_CTL1), 0x1);
440 reg = readl(priv->mac_reg + EMAC_CTL1);
441 } while ((reg & 0x01) != 0 && (--timeout));
443 printf("%s: Timeout\n", __func__);
448 /* Rewrite mac address after reset */
449 _sun8i_write_hwaddr(priv, enetaddr);
451 v = readl(priv->mac_reg + EMAC_TX_CTL1);
452 /* TX_MD Transmission starts after a full frame located in TX DMA FIFO*/
454 writel(v, priv->mac_reg + EMAC_TX_CTL1);
456 v = readl(priv->mac_reg + EMAC_RX_CTL1);
457 /* RX_MD RX DMA reads data from RX DMA FIFO to host memory after a
458 * complete frame has been written to RX DMA FIFO
461 writel(v, priv->mac_reg + EMAC_RX_CTL1);
464 writel(8 << 24, priv->mac_reg + EMAC_CTL1);
466 /* Initialize rx/tx descriptors */
471 phy_startup(priv->phydev);
473 sun8i_adjust_link(priv, priv->phydev);
476 v = readl(priv->mac_reg + EMAC_RX_CTL1);
478 writel(v, priv->mac_reg + EMAC_RX_CTL1);
480 v = readl(priv->mac_reg + EMAC_TX_CTL1);
482 writel(v, priv->mac_reg + EMAC_TX_CTL1);
485 setbits_le32(priv->mac_reg + EMAC_RX_CTL0, BIT(31));
486 setbits_le32(priv->mac_reg + EMAC_TX_CTL0, BIT(31));
491 static int parse_phy_pins(struct udevice *dev)
493 struct emac_eth_dev *priv = dev_get_priv(dev);
495 const char *pin_name;
496 int drive, pull = SUN4I_PINCTRL_NO_PULL, i;
498 offset = fdtdec_lookup_phandle(gd->fdt_blob, dev_of_offset(dev),
501 printf("WARNING: emac: cannot find pinctrl-0 node\n");
505 drive = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0,
506 "drive-strength", ~0);
509 drive = SUN4I_PINCTRL_10_MA;
510 else if (drive <= 20)
511 drive = SUN4I_PINCTRL_20_MA;
512 else if (drive <= 30)
513 drive = SUN4I_PINCTRL_30_MA;
515 drive = SUN4I_PINCTRL_40_MA;
518 if (fdt_get_property(gd->fdt_blob, offset, "bias-pull-up", NULL))
519 pull = SUN4I_PINCTRL_PULL_UP;
520 else if (fdt_get_property(gd->fdt_blob, offset, "bias-pull-down", NULL))
521 pull = SUN4I_PINCTRL_PULL_DOWN;
526 pin_name = fdt_stringlist_get(gd->fdt_blob, offset,
531 pin = sunxi_name_to_gpio(pin_name);
535 if (priv->variant == H3_EMAC)
536 sunxi_gpio_set_cfgpin(pin, SUN8I_IOMUX_H3);
537 else if (priv->variant == R40_GMAC)
538 sunxi_gpio_set_cfgpin(pin, SUN8I_IOMUX_R40);
540 sunxi_gpio_set_cfgpin(pin, SUN8I_IOMUX);
543 sunxi_gpio_set_drv(pin, drive);
545 sunxi_gpio_set_pull(pin, pull);
549 printf("WARNING: emac: cannot find pins property\n");
556 static int _sun8i_eth_recv(struct emac_eth_dev *priv, uchar **packetp)
558 u32 status, desc_num = priv->rx_currdescnum;
559 struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num];
560 int length = -EAGAIN;
562 uintptr_t desc_start = (uintptr_t)desc_p;
563 uintptr_t desc_end = desc_start +
564 roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN);
566 ulong data_start = (uintptr_t)desc_p->buf_addr;
569 /* Invalidate entire buffer descriptor */
570 invalidate_dcache_range(desc_start, desc_end);
572 status = desc_p->status;
574 /* Check for DMA own bit */
575 if (!(status & BIT(31))) {
576 length = (desc_p->status >> 16) & 0x3FFF;
580 debug("RX: Bad Packet (runt)\n");
583 data_end = data_start + length;
584 /* Invalidate received data */
585 invalidate_dcache_range(rounddown(data_start,
590 if (length > CONFIG_ETH_RXSIZE) {
591 printf("Received packet is too big (len=%d)\n",
595 *packetp = (uchar *)(ulong)desc_p->buf_addr;
603 static int _sun8i_emac_eth_send(struct emac_eth_dev *priv, void *packet,
606 u32 v, desc_num = priv->tx_currdescnum;
607 struct emac_dma_desc *desc_p = &priv->tx_chain[desc_num];
608 uintptr_t desc_start = (uintptr_t)desc_p;
609 uintptr_t desc_end = desc_start +
610 roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN);
612 uintptr_t data_start = (uintptr_t)desc_p->buf_addr;
613 uintptr_t data_end = data_start +
614 roundup(len, ARCH_DMA_MINALIGN);
616 /* Invalidate entire buffer descriptor */
617 invalidate_dcache_range(desc_start, desc_end);
620 /* Mandatory undocumented bit */
621 desc_p->st |= BIT(24);
623 memcpy((void *)data_start, packet, len);
625 /* Flush data to be sent */
626 flush_dcache_range(data_start, data_end);
629 desc_p->st |= BIT(30);
630 desc_p->st |= BIT(31);
633 desc_p->st |= BIT(29);
634 desc_p->status = BIT(31);
636 /*Descriptors st and status field has changed, so FLUSH it */
637 flush_dcache_range(desc_start, desc_end);
639 /* Move to next Descriptor and wrap around */
640 if (++desc_num >= CONFIG_TX_DESCR_NUM)
642 priv->tx_currdescnum = desc_num;
645 v = readl(priv->mac_reg + EMAC_TX_CTL1);
646 v |= BIT(31);/* mandatory */
647 v |= BIT(30);/* mandatory */
648 writel(v, priv->mac_reg + EMAC_TX_CTL1);
653 static int sun8i_eth_write_hwaddr(struct udevice *dev)
655 struct eth_pdata *pdata = dev_get_platdata(dev);
656 struct emac_eth_dev *priv = dev_get_priv(dev);
658 return _sun8i_write_hwaddr(priv, pdata->enetaddr);
661 static int sun8i_emac_board_setup(struct emac_eth_dev *priv)
665 ret = clk_enable(&priv->tx_clk);
667 dev_err(dev, "failed to enable TX clock\n");
671 if (reset_valid(&priv->tx_rst)) {
672 ret = reset_deassert(&priv->tx_rst);
674 dev_err(dev, "failed to deassert TX reset\n");
679 /* Only H3/H5 have clock controls for internal EPHY */
680 if (clk_valid(&priv->ephy_clk)) {
681 ret = clk_enable(&priv->ephy_clk);
683 dev_err(dev, "failed to enable EPHY TX clock\n");
688 if (reset_valid(&priv->ephy_rst)) {
689 ret = reset_deassert(&priv->ephy_rst);
691 dev_err(dev, "failed to deassert EPHY TX clock\n");
699 clk_disable(&priv->tx_clk);
703 #if CONFIG_IS_ENABLED(DM_GPIO)
704 static int sun8i_mdio_reset(struct mii_dev *bus)
706 struct udevice *dev = bus->priv;
707 struct emac_eth_dev *priv = dev_get_priv(dev);
708 struct sun8i_eth_pdata *pdata = dev_get_platdata(dev);
711 if (!dm_gpio_is_valid(&priv->reset_gpio))
715 ret = dm_gpio_set_value(&priv->reset_gpio, 0);
719 udelay(pdata->reset_delays[0]);
721 ret = dm_gpio_set_value(&priv->reset_gpio, 1);
725 udelay(pdata->reset_delays[1]);
727 ret = dm_gpio_set_value(&priv->reset_gpio, 0);
731 udelay(pdata->reset_delays[2]);
737 static int sun8i_mdio_init(const char *name, struct udevice *priv)
739 struct mii_dev *bus = mdio_alloc();
742 debug("Failed to allocate MDIO bus\n");
746 bus->read = sun8i_mdio_read;
747 bus->write = sun8i_mdio_write;
748 snprintf(bus->name, sizeof(bus->name), name);
749 bus->priv = (void *)priv;
750 #if CONFIG_IS_ENABLED(DM_GPIO)
751 bus->reset = sun8i_mdio_reset;
754 return mdio_register(bus);
757 static int sun8i_emac_eth_start(struct udevice *dev)
759 struct eth_pdata *pdata = dev_get_platdata(dev);
761 return _sun8i_emac_eth_init(dev->priv, pdata->enetaddr);
764 static int sun8i_emac_eth_send(struct udevice *dev, void *packet, int length)
766 struct emac_eth_dev *priv = dev_get_priv(dev);
768 return _sun8i_emac_eth_send(priv, packet, length);
771 static int sun8i_emac_eth_recv(struct udevice *dev, int flags, uchar **packetp)
773 struct emac_eth_dev *priv = dev_get_priv(dev);
775 return _sun8i_eth_recv(priv, packetp);
778 static int _sun8i_free_pkt(struct emac_eth_dev *priv)
780 u32 desc_num = priv->rx_currdescnum;
781 struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num];
782 uintptr_t desc_start = (uintptr_t)desc_p;
783 uintptr_t desc_end = desc_start +
784 roundup(sizeof(u32), ARCH_DMA_MINALIGN);
786 /* Make the current descriptor valid again */
787 desc_p->status |= BIT(31);
789 /* Flush Status field of descriptor */
790 flush_dcache_range(desc_start, desc_end);
792 /* Move to next desc and wrap-around condition. */
793 if (++desc_num >= CONFIG_RX_DESCR_NUM)
795 priv->rx_currdescnum = desc_num;
800 static int sun8i_eth_free_pkt(struct udevice *dev, uchar *packet,
803 struct emac_eth_dev *priv = dev_get_priv(dev);
805 return _sun8i_free_pkt(priv);
808 static void sun8i_emac_eth_stop(struct udevice *dev)
810 struct emac_eth_dev *priv = dev_get_priv(dev);
812 /* Stop Rx/Tx transmitter */
813 clrbits_le32(priv->mac_reg + EMAC_RX_CTL0, BIT(31));
814 clrbits_le32(priv->mac_reg + EMAC_TX_CTL0, BIT(31));
817 clrbits_le32(priv->mac_reg + EMAC_TX_CTL1, BIT(30));
819 phy_shutdown(priv->phydev);
822 static int sun8i_emac_eth_probe(struct udevice *dev)
824 struct sun8i_eth_pdata *sun8i_pdata = dev_get_platdata(dev);
825 struct eth_pdata *pdata = &sun8i_pdata->eth_pdata;
826 struct emac_eth_dev *priv = dev_get_priv(dev);
829 priv->mac_reg = (void *)pdata->iobase;
831 ret = sun8i_emac_board_setup(priv);
835 sun8i_emac_set_syscon(sun8i_pdata, priv);
837 sun8i_mdio_init(dev->name, dev);
838 priv->bus = miiphy_get_dev_by_name(dev->name);
840 return sun8i_phy_init(priv, dev);
843 static const struct eth_ops sun8i_emac_eth_ops = {
844 .start = sun8i_emac_eth_start,
845 .write_hwaddr = sun8i_eth_write_hwaddr,
846 .send = sun8i_emac_eth_send,
847 .recv = sun8i_emac_eth_recv,
848 .free_pkt = sun8i_eth_free_pkt,
849 .stop = sun8i_emac_eth_stop,
852 static int sun8i_get_ephy_nodes(struct emac_eth_dev *priv)
854 int emac_node, ephy_node, ret, ephy_handle;
856 emac_node = fdt_path_offset(gd->fdt_blob,
857 "/soc/ethernet@1c30000");
859 debug("failed to get emac node\n");
862 ephy_handle = fdtdec_lookup_phandle(gd->fdt_blob,
863 emac_node, "phy-handle");
865 /* look for mdio-mux node for internal PHY node */
866 ephy_node = fdt_path_offset(gd->fdt_blob,
867 "/soc/ethernet@1c30000/mdio-mux/mdio@1/ethernet-phy@1");
869 debug("failed to get mdio-mux with internal PHY\n");
873 /* This is not the phy we are looking for */
874 if (ephy_node != ephy_handle)
877 ret = fdt_node_check_compatible(gd->fdt_blob, ephy_node,
878 "allwinner,sun8i-h3-mdio-internal");
880 debug("failed to find mdio-internal node\n");
884 ret = clk_get_by_index_nodev(offset_to_ofnode(ephy_node), 0,
887 dev_err(dev, "failed to get EPHY TX clock\n");
891 ret = reset_get_by_index_nodev(offset_to_ofnode(ephy_node), 0,
894 dev_err(dev, "failed to get EPHY TX reset\n");
898 priv->use_internal_phy = true;
903 static int sun8i_emac_eth_ofdata_to_platdata(struct udevice *dev)
905 struct sun8i_eth_pdata *sun8i_pdata = dev_get_platdata(dev);
906 struct eth_pdata *pdata = &sun8i_pdata->eth_pdata;
907 struct emac_eth_dev *priv = dev_get_priv(dev);
908 const char *phy_mode;
910 int node = dev_of_offset(dev);
912 #if CONFIG_IS_ENABLED(DM_GPIO)
913 int reset_flags = GPIOD_IS_OUT;
917 pdata->iobase = devfdt_get_addr(dev);
918 if (pdata->iobase == FDT_ADDR_T_NONE) {
919 debug("%s: Cannot find MAC base address\n", __func__);
923 priv->variant = dev_get_driver_data(dev);
925 if (!priv->variant) {
926 printf("%s: Missing variant\n", __func__);
930 ret = clk_get_by_name(dev, "stmmaceth", &priv->tx_clk);
932 dev_err(dev, "failed to get TX clock\n");
936 ret = reset_get_by_name(dev, "stmmaceth", &priv->tx_rst);
937 if (ret && ret != -ENOENT) {
938 dev_err(dev, "failed to get TX reset\n");
942 offset = fdtdec_lookup_phandle(gd->fdt_blob, node, "syscon");
944 debug("%s: cannot find syscon node\n", __func__);
948 reg = fdt_getprop(gd->fdt_blob, offset, "reg", NULL);
950 debug("%s: cannot find reg property in syscon node\n",
954 priv->sysctl_reg = fdt_translate_address((void *)gd->fdt_blob,
956 if (priv->sysctl_reg == FDT_ADDR_T_NONE) {
957 debug("%s: Cannot find syscon base address\n", __func__);
961 pdata->phy_interface = -1;
963 priv->use_internal_phy = false;
965 offset = fdtdec_lookup_phandle(gd->fdt_blob, node, "phy-handle");
967 debug("%s: Cannot find PHY address\n", __func__);
970 priv->phyaddr = fdtdec_get_int(gd->fdt_blob, offset, "reg", -1);
972 phy_mode = fdt_getprop(gd->fdt_blob, node, "phy-mode", NULL);
975 pdata->phy_interface = phy_get_interface_by_name(phy_mode);
976 printf("phy interface%d\n", pdata->phy_interface);
978 if (pdata->phy_interface == -1) {
979 debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode);
983 if (priv->variant == H3_EMAC) {
984 ret = sun8i_get_ephy_nodes(priv);
989 priv->interface = pdata->phy_interface;
991 if (!priv->use_internal_phy)
994 sun8i_pdata->tx_delay_ps = fdtdec_get_int(gd->fdt_blob, node,
995 "allwinner,tx-delay-ps", 0);
996 if (sun8i_pdata->tx_delay_ps < 0 || sun8i_pdata->tx_delay_ps > 700)
997 printf("%s: Invalid TX delay value %d\n", __func__,
998 sun8i_pdata->tx_delay_ps);
1000 sun8i_pdata->rx_delay_ps = fdtdec_get_int(gd->fdt_blob, node,
1001 "allwinner,rx-delay-ps", 0);
1002 if (sun8i_pdata->rx_delay_ps < 0 || sun8i_pdata->rx_delay_ps > 3100)
1003 printf("%s: Invalid RX delay value %d\n", __func__,
1004 sun8i_pdata->rx_delay_ps);
1006 #if CONFIG_IS_ENABLED(DM_GPIO)
1007 if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
1008 "snps,reset-active-low"))
1009 reset_flags |= GPIOD_ACTIVE_LOW;
1011 ret = gpio_request_by_name(dev, "snps,reset-gpio", 0,
1012 &priv->reset_gpio, reset_flags);
1015 ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
1016 "snps,reset-delays-us",
1017 sun8i_pdata->reset_delays, 3);
1018 } else if (ret == -ENOENT) {
1026 static const struct udevice_id sun8i_emac_eth_ids[] = {
1027 {.compatible = "allwinner,sun8i-h3-emac", .data = (uintptr_t)H3_EMAC },
1028 {.compatible = "allwinner,sun50i-a64-emac",
1029 .data = (uintptr_t)A64_EMAC },
1030 {.compatible = "allwinner,sun8i-a83t-emac",
1031 .data = (uintptr_t)A83T_EMAC },
1032 {.compatible = "allwinner,sun8i-r40-gmac",
1033 .data = (uintptr_t)R40_GMAC },
1037 U_BOOT_DRIVER(eth_sun8i_emac) = {
1038 .name = "eth_sun8i_emac",
1040 .of_match = sun8i_emac_eth_ids,
1041 .ofdata_to_platdata = sun8i_emac_eth_ofdata_to_platdata,
1042 .probe = sun8i_emac_eth_probe,
1043 .ops = &sun8i_emac_eth_ops,
1044 .priv_auto_alloc_size = sizeof(struct emac_eth_dev),
1045 .platdata_auto_alloc_size = sizeof(struct sun8i_eth_pdata),
1046 .flags = DM_FLAG_ALLOC_PRIV_DMA,