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/bitops.h>
25 #include <linux/delay.h>
26 #include <linux/err.h>
31 #include <dt-bindings/pinctrl/sun4i-a10.h>
32 #if CONFIG_IS_ENABLED(DM_GPIO)
33 #include <asm-generic/gpio.h>
36 #define MDIO_CMD_MII_BUSY BIT(0)
37 #define MDIO_CMD_MII_WRITE BIT(1)
39 #define MDIO_CMD_MII_PHY_REG_ADDR_MASK 0x000001f0
40 #define MDIO_CMD_MII_PHY_REG_ADDR_SHIFT 4
41 #define MDIO_CMD_MII_PHY_ADDR_MASK 0x0001f000
42 #define MDIO_CMD_MII_PHY_ADDR_SHIFT 12
44 #define CONFIG_TX_DESCR_NUM 32
45 #define CONFIG_RX_DESCR_NUM 32
46 #define CONFIG_ETH_BUFSIZE 2048 /* Note must be dma aligned */
49 * The datasheet says that each descriptor can transfers up to 4096 bytes
50 * But later, the register documentation reduces that value to 2048,
51 * using 2048 cause strange behaviours and even BSP driver use 2047
53 #define CONFIG_ETH_RXSIZE 2044 /* Note must fit in ETH_BUFSIZE */
55 #define TX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_TX_DESCR_NUM)
56 #define RX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_RX_DESCR_NUM)
58 #define H3_EPHY_DEFAULT_VALUE 0x58000
59 #define H3_EPHY_DEFAULT_MASK GENMASK(31, 15)
60 #define H3_EPHY_ADDR_SHIFT 20
61 #define REG_PHY_ADDR_MASK GENMASK(4, 0)
62 #define H3_EPHY_LED_POL BIT(17) /* 1: active low, 0: active high */
63 #define H3_EPHY_SHUTDOWN BIT(16) /* 1: shutdown, 0: power up */
64 #define H3_EPHY_SELECT BIT(15) /* 1: internal PHY, 0: external PHY */
66 #define SC_RMII_EN BIT(13)
67 #define SC_EPIT BIT(2) /* 1: RGMII, 0: MII */
68 #define SC_ETCS_MASK GENMASK(1, 0)
69 #define SC_ETCS_EXT_GMII 0x1
70 #define SC_ETCS_INT_GMII 0x2
71 #define SC_ETXDC_MASK GENMASK(12, 10)
72 #define SC_ETXDC_OFFSET 10
73 #define SC_ERXDC_MASK GENMASK(9, 5)
74 #define SC_ERXDC_OFFSET 5
76 #define CONFIG_MDIO_TIMEOUT (3 * CONFIG_SYS_HZ)
78 #define AHB_GATE_OFFSET_EPHY 0
81 #define SUN8I_IOMUX_H3 2
82 #define SUN8I_IOMUX_R40 5
85 /* H3/A64 EMAC Register's offset */
86 #define EMAC_CTL0 0x00
87 #define EMAC_CTL1 0x04
88 #define EMAC_INT_STA 0x08
89 #define EMAC_INT_EN 0x0c
90 #define EMAC_TX_CTL0 0x10
91 #define EMAC_TX_CTL1 0x14
92 #define EMAC_TX_FLOW_CTL 0x1c
93 #define EMAC_TX_DMA_DESC 0x20
94 #define EMAC_RX_CTL0 0x24
95 #define EMAC_RX_CTL1 0x28
96 #define EMAC_RX_DMA_DESC 0x34
97 #define EMAC_MII_CMD 0x48
98 #define EMAC_MII_DATA 0x4c
99 #define EMAC_ADDR0_HIGH 0x50
100 #define EMAC_ADDR0_LOW 0x54
101 #define EMAC_TX_DMA_STA 0xb0
102 #define EMAC_TX_CUR_DESC 0xb4
103 #define EMAC_TX_CUR_BUF 0xb8
104 #define EMAC_RX_DMA_STA 0xc0
105 #define EMAC_RX_CUR_DESC 0xc4
107 DECLARE_GLOBAL_DATA_PTR;
116 struct emac_dma_desc {
121 } __aligned(ARCH_DMA_MINALIGN);
123 struct emac_eth_dev {
124 struct emac_dma_desc rx_chain[CONFIG_TX_DESCR_NUM];
125 struct emac_dma_desc tx_chain[CONFIG_RX_DESCR_NUM];
126 char rxbuffer[RX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
127 char txbuffer[TX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
139 bool use_internal_phy;
141 enum emac_variant variant;
143 phys_addr_t sysctl_reg;
144 struct phy_device *phydev;
148 struct reset_ctl tx_rst;
149 struct reset_ctl ephy_rst;
150 #if CONFIG_IS_ENABLED(DM_GPIO)
151 struct gpio_desc reset_gpio;
156 struct sun8i_eth_pdata {
157 struct eth_pdata eth_pdata;
164 static int sun8i_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
166 struct udevice *dev = bus->priv;
167 struct emac_eth_dev *priv = dev_get_priv(dev);
170 int timeout = CONFIG_MDIO_TIMEOUT;
172 miiaddr &= ~MDIO_CMD_MII_WRITE;
173 miiaddr &= ~MDIO_CMD_MII_PHY_REG_ADDR_MASK;
174 miiaddr |= (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) &
175 MDIO_CMD_MII_PHY_REG_ADDR_MASK;
177 miiaddr &= ~MDIO_CMD_MII_PHY_ADDR_MASK;
179 miiaddr |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) &
180 MDIO_CMD_MII_PHY_ADDR_MASK;
182 miiaddr |= MDIO_CMD_MII_BUSY;
184 writel(miiaddr, priv->mac_reg + EMAC_MII_CMD);
186 start = get_timer(0);
187 while (get_timer(start) < timeout) {
188 if (!(readl(priv->mac_reg + EMAC_MII_CMD) & MDIO_CMD_MII_BUSY))
189 return readl(priv->mac_reg + EMAC_MII_DATA);
196 static int sun8i_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
199 struct udevice *dev = bus->priv;
200 struct emac_eth_dev *priv = dev_get_priv(dev);
203 int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
205 miiaddr &= ~MDIO_CMD_MII_PHY_REG_ADDR_MASK;
206 miiaddr |= (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) &
207 MDIO_CMD_MII_PHY_REG_ADDR_MASK;
209 miiaddr &= ~MDIO_CMD_MII_PHY_ADDR_MASK;
210 miiaddr |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) &
211 MDIO_CMD_MII_PHY_ADDR_MASK;
213 miiaddr |= MDIO_CMD_MII_WRITE;
214 miiaddr |= MDIO_CMD_MII_BUSY;
216 writel(val, priv->mac_reg + EMAC_MII_DATA);
217 writel(miiaddr, priv->mac_reg + EMAC_MII_CMD);
219 start = get_timer(0);
220 while (get_timer(start) < timeout) {
221 if (!(readl(priv->mac_reg + EMAC_MII_CMD) &
222 MDIO_CMD_MII_BUSY)) {
232 static int _sun8i_write_hwaddr(struct emac_eth_dev *priv, u8 *mac_id)
234 u32 macid_lo, macid_hi;
236 macid_lo = mac_id[0] + (mac_id[1] << 8) + (mac_id[2] << 16) +
238 macid_hi = mac_id[4] + (mac_id[5] << 8);
240 writel(macid_hi, priv->mac_reg + EMAC_ADDR0_HIGH);
241 writel(macid_lo, priv->mac_reg + EMAC_ADDR0_LOW);
246 static void sun8i_adjust_link(struct emac_eth_dev *priv,
247 struct phy_device *phydev)
251 v = readl(priv->mac_reg + EMAC_CTL0);
260 switch (phydev->speed) {
271 writel(v, priv->mac_reg + EMAC_CTL0);
274 static int sun8i_emac_set_syscon_ephy(struct emac_eth_dev *priv, u32 *reg)
276 if (priv->use_internal_phy) {
277 /* H3 based SoC's that has an Internal 100MBit PHY
278 * needs to be configured and powered up before use
280 *reg &= ~H3_EPHY_DEFAULT_MASK;
281 *reg |= H3_EPHY_DEFAULT_VALUE;
282 *reg |= priv->phyaddr << H3_EPHY_ADDR_SHIFT;
283 *reg &= ~H3_EPHY_SHUTDOWN;
284 *reg |= H3_EPHY_SELECT;
286 /* This is to select External Gigabit PHY on
287 * the boards with H3 SoC.
289 *reg &= ~H3_EPHY_SELECT;
294 static int sun8i_emac_set_syscon(struct sun8i_eth_pdata *pdata,
295 struct emac_eth_dev *priv)
300 if (priv->variant == R40_GMAC) {
301 /* Select RGMII for R40 */
302 reg = readl(priv->sysctl_reg + 0x164);
303 reg |= CCM_GMAC_CTRL_TX_CLK_SRC_INT_RGMII |
304 CCM_GMAC_CTRL_GPIT_RGMII |
305 CCM_GMAC_CTRL_TX_CLK_DELAY(CONFIG_GMAC_TX_DELAY);
307 writel(reg, priv->sysctl_reg + 0x164);
311 reg = readl(priv->sysctl_reg + 0x30);
313 if (priv->variant == H3_EMAC) {
314 ret = sun8i_emac_set_syscon_ephy(priv, ®);
319 reg &= ~(SC_ETCS_MASK | SC_EPIT);
320 if (priv->variant == H3_EMAC || priv->variant == A64_EMAC)
323 switch (priv->interface) {
324 case PHY_INTERFACE_MODE_MII:
327 case PHY_INTERFACE_MODE_RGMII:
328 reg |= SC_EPIT | SC_ETCS_INT_GMII;
330 case PHY_INTERFACE_MODE_RMII:
331 if (priv->variant == H3_EMAC ||
332 priv->variant == A64_EMAC) {
333 reg |= SC_RMII_EN | SC_ETCS_EXT_GMII;
336 /* RMII not supported on A83T */
338 debug("%s: Invalid PHY interface\n", __func__);
342 if (pdata->tx_delay_ps)
343 reg |= ((pdata->tx_delay_ps / 100) << SC_ETXDC_OFFSET)
346 if (pdata->rx_delay_ps)
347 reg |= ((pdata->rx_delay_ps / 100) << SC_ERXDC_OFFSET)
350 writel(reg, priv->sysctl_reg + 0x30);
355 static int sun8i_phy_init(struct emac_eth_dev *priv, void *dev)
357 struct phy_device *phydev;
359 phydev = phy_connect(priv->bus, priv->phyaddr, dev, priv->interface);
363 phy_connect_dev(phydev, dev);
365 priv->phydev = phydev;
366 phy_config(priv->phydev);
371 static void rx_descs_init(struct emac_eth_dev *priv)
373 struct emac_dma_desc *desc_table_p = &priv->rx_chain[0];
374 char *rxbuffs = &priv->rxbuffer[0];
375 struct emac_dma_desc *desc_p;
378 /* flush Rx buffers */
379 flush_dcache_range((uintptr_t)rxbuffs, (ulong)rxbuffs +
382 for (idx = 0; idx < CONFIG_RX_DESCR_NUM; idx++) {
383 desc_p = &desc_table_p[idx];
384 desc_p->buf_addr = (uintptr_t)&rxbuffs[idx * CONFIG_ETH_BUFSIZE]
386 desc_p->next = (uintptr_t)&desc_table_p[idx + 1];
387 desc_p->st |= CONFIG_ETH_RXSIZE;
388 desc_p->status = BIT(31);
391 /* Correcting the last pointer of the chain */
392 desc_p->next = (uintptr_t)&desc_table_p[0];
394 flush_dcache_range((uintptr_t)priv->rx_chain,
395 (uintptr_t)priv->rx_chain +
396 sizeof(priv->rx_chain));
398 writel((uintptr_t)&desc_table_p[0], (priv->mac_reg + EMAC_RX_DMA_DESC));
399 priv->rx_currdescnum = 0;
402 static void tx_descs_init(struct emac_eth_dev *priv)
404 struct emac_dma_desc *desc_table_p = &priv->tx_chain[0];
405 char *txbuffs = &priv->txbuffer[0];
406 struct emac_dma_desc *desc_p;
409 for (idx = 0; idx < CONFIG_TX_DESCR_NUM; idx++) {
410 desc_p = &desc_table_p[idx];
411 desc_p->buf_addr = (uintptr_t)&txbuffs[idx * CONFIG_ETH_BUFSIZE]
413 desc_p->next = (uintptr_t)&desc_table_p[idx + 1];
414 desc_p->status = (1 << 31);
418 /* Correcting the last pointer of the chain */
419 desc_p->next = (uintptr_t)&desc_table_p[0];
421 /* Flush all Tx buffer descriptors */
422 flush_dcache_range((uintptr_t)priv->tx_chain,
423 (uintptr_t)priv->tx_chain +
424 sizeof(priv->tx_chain));
426 writel((uintptr_t)&desc_table_p[0], priv->mac_reg + EMAC_TX_DMA_DESC);
427 priv->tx_currdescnum = 0;
430 static int _sun8i_emac_eth_init(struct emac_eth_dev *priv, u8 *enetaddr)
435 reg = readl((priv->mac_reg + EMAC_CTL1));
439 setbits_le32((priv->mac_reg + EMAC_CTL1), 0x1);
441 reg = readl(priv->mac_reg + EMAC_CTL1);
442 } while ((reg & 0x01) != 0 && (--timeout));
444 printf("%s: Timeout\n", __func__);
449 /* Rewrite mac address after reset */
450 _sun8i_write_hwaddr(priv, enetaddr);
452 v = readl(priv->mac_reg + EMAC_TX_CTL1);
453 /* TX_MD Transmission starts after a full frame located in TX DMA FIFO*/
455 writel(v, priv->mac_reg + EMAC_TX_CTL1);
457 v = readl(priv->mac_reg + EMAC_RX_CTL1);
458 /* RX_MD RX DMA reads data from RX DMA FIFO to host memory after a
459 * complete frame has been written to RX DMA FIFO
462 writel(v, priv->mac_reg + EMAC_RX_CTL1);
465 writel(8 << 24, priv->mac_reg + EMAC_CTL1);
467 /* Initialize rx/tx descriptors */
472 phy_startup(priv->phydev);
474 sun8i_adjust_link(priv, priv->phydev);
477 v = readl(priv->mac_reg + EMAC_RX_CTL1);
479 writel(v, priv->mac_reg + EMAC_RX_CTL1);
481 v = readl(priv->mac_reg + EMAC_TX_CTL1);
483 writel(v, priv->mac_reg + EMAC_TX_CTL1);
486 setbits_le32(priv->mac_reg + EMAC_RX_CTL0, BIT(31));
487 setbits_le32(priv->mac_reg + EMAC_TX_CTL0, BIT(31));
492 static int parse_phy_pins(struct udevice *dev)
494 struct emac_eth_dev *priv = dev_get_priv(dev);
496 const char *pin_name;
497 int drive, pull = SUN4I_PINCTRL_NO_PULL, i;
499 offset = fdtdec_lookup_phandle(gd->fdt_blob, dev_of_offset(dev),
502 printf("WARNING: emac: cannot find pinctrl-0 node\n");
506 drive = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0,
507 "drive-strength", ~0);
510 drive = SUN4I_PINCTRL_10_MA;
511 else if (drive <= 20)
512 drive = SUN4I_PINCTRL_20_MA;
513 else if (drive <= 30)
514 drive = SUN4I_PINCTRL_30_MA;
516 drive = SUN4I_PINCTRL_40_MA;
519 if (fdt_get_property(gd->fdt_blob, offset, "bias-pull-up", NULL))
520 pull = SUN4I_PINCTRL_PULL_UP;
521 else if (fdt_get_property(gd->fdt_blob, offset, "bias-pull-down", NULL))
522 pull = SUN4I_PINCTRL_PULL_DOWN;
527 pin_name = fdt_stringlist_get(gd->fdt_blob, offset,
532 pin = sunxi_name_to_gpio(pin_name);
536 if (priv->variant == H3_EMAC)
537 sunxi_gpio_set_cfgpin(pin, SUN8I_IOMUX_H3);
538 else if (priv->variant == R40_GMAC)
539 sunxi_gpio_set_cfgpin(pin, SUN8I_IOMUX_R40);
541 sunxi_gpio_set_cfgpin(pin, SUN8I_IOMUX);
544 sunxi_gpio_set_drv(pin, drive);
546 sunxi_gpio_set_pull(pin, pull);
550 printf("WARNING: emac: cannot find pins property\n");
557 static int _sun8i_eth_recv(struct emac_eth_dev *priv, uchar **packetp)
559 u32 status, desc_num = priv->rx_currdescnum;
560 struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num];
561 int length = -EAGAIN;
563 uintptr_t desc_start = (uintptr_t)desc_p;
564 uintptr_t desc_end = desc_start +
565 roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN);
567 ulong data_start = (uintptr_t)desc_p->buf_addr;
570 /* Invalidate entire buffer descriptor */
571 invalidate_dcache_range(desc_start, desc_end);
573 status = desc_p->status;
575 /* Check for DMA own bit */
576 if (!(status & BIT(31))) {
577 length = (desc_p->status >> 16) & 0x3FFF;
581 debug("RX: Bad Packet (runt)\n");
584 data_end = data_start + length;
585 /* Invalidate received data */
586 invalidate_dcache_range(rounddown(data_start,
591 if (length > CONFIG_ETH_RXSIZE) {
592 printf("Received packet is too big (len=%d)\n",
596 *packetp = (uchar *)(ulong)desc_p->buf_addr;
604 static int _sun8i_emac_eth_send(struct emac_eth_dev *priv, void *packet,
607 u32 v, desc_num = priv->tx_currdescnum;
608 struct emac_dma_desc *desc_p = &priv->tx_chain[desc_num];
609 uintptr_t desc_start = (uintptr_t)desc_p;
610 uintptr_t desc_end = desc_start +
611 roundup(sizeof(*desc_p), ARCH_DMA_MINALIGN);
613 uintptr_t data_start = (uintptr_t)desc_p->buf_addr;
614 uintptr_t data_end = data_start +
615 roundup(len, ARCH_DMA_MINALIGN);
617 /* Invalidate entire buffer descriptor */
618 invalidate_dcache_range(desc_start, desc_end);
621 /* Mandatory undocumented bit */
622 desc_p->st |= BIT(24);
624 memcpy((void *)data_start, packet, len);
626 /* Flush data to be sent */
627 flush_dcache_range(data_start, data_end);
630 desc_p->st |= BIT(30);
631 desc_p->st |= BIT(31);
634 desc_p->st |= BIT(29);
635 desc_p->status = BIT(31);
637 /*Descriptors st and status field has changed, so FLUSH it */
638 flush_dcache_range(desc_start, desc_end);
640 /* Move to next Descriptor and wrap around */
641 if (++desc_num >= CONFIG_TX_DESCR_NUM)
643 priv->tx_currdescnum = desc_num;
646 v = readl(priv->mac_reg + EMAC_TX_CTL1);
647 v |= BIT(31);/* mandatory */
648 v |= BIT(30);/* mandatory */
649 writel(v, priv->mac_reg + EMAC_TX_CTL1);
654 static int sun8i_eth_write_hwaddr(struct udevice *dev)
656 struct eth_pdata *pdata = dev_get_platdata(dev);
657 struct emac_eth_dev *priv = dev_get_priv(dev);
659 return _sun8i_write_hwaddr(priv, pdata->enetaddr);
662 static int sun8i_emac_board_setup(struct emac_eth_dev *priv)
666 ret = clk_enable(&priv->tx_clk);
668 dev_err(dev, "failed to enable TX clock\n");
672 if (reset_valid(&priv->tx_rst)) {
673 ret = reset_deassert(&priv->tx_rst);
675 dev_err(dev, "failed to deassert TX reset\n");
680 /* Only H3/H5 have clock controls for internal EPHY */
681 if (clk_valid(&priv->ephy_clk)) {
682 ret = clk_enable(&priv->ephy_clk);
684 dev_err(dev, "failed to enable EPHY TX clock\n");
689 if (reset_valid(&priv->ephy_rst)) {
690 ret = reset_deassert(&priv->ephy_rst);
692 dev_err(dev, "failed to deassert EPHY TX clock\n");
700 clk_disable(&priv->tx_clk);
704 #if CONFIG_IS_ENABLED(DM_GPIO)
705 static int sun8i_mdio_reset(struct mii_dev *bus)
707 struct udevice *dev = bus->priv;
708 struct emac_eth_dev *priv = dev_get_priv(dev);
709 struct sun8i_eth_pdata *pdata = dev_get_platdata(dev);
712 if (!dm_gpio_is_valid(&priv->reset_gpio))
716 ret = dm_gpio_set_value(&priv->reset_gpio, 0);
720 udelay(pdata->reset_delays[0]);
722 ret = dm_gpio_set_value(&priv->reset_gpio, 1);
726 udelay(pdata->reset_delays[1]);
728 ret = dm_gpio_set_value(&priv->reset_gpio, 0);
732 udelay(pdata->reset_delays[2]);
738 static int sun8i_mdio_init(const char *name, struct udevice *priv)
740 struct mii_dev *bus = mdio_alloc();
743 debug("Failed to allocate MDIO bus\n");
747 bus->read = sun8i_mdio_read;
748 bus->write = sun8i_mdio_write;
749 snprintf(bus->name, sizeof(bus->name), name);
750 bus->priv = (void *)priv;
751 #if CONFIG_IS_ENABLED(DM_GPIO)
752 bus->reset = sun8i_mdio_reset;
755 return mdio_register(bus);
758 static int sun8i_emac_eth_start(struct udevice *dev)
760 struct eth_pdata *pdata = dev_get_platdata(dev);
762 return _sun8i_emac_eth_init(dev->priv, pdata->enetaddr);
765 static int sun8i_emac_eth_send(struct udevice *dev, void *packet, int length)
767 struct emac_eth_dev *priv = dev_get_priv(dev);
769 return _sun8i_emac_eth_send(priv, packet, length);
772 static int sun8i_emac_eth_recv(struct udevice *dev, int flags, uchar **packetp)
774 struct emac_eth_dev *priv = dev_get_priv(dev);
776 return _sun8i_eth_recv(priv, packetp);
779 static int _sun8i_free_pkt(struct emac_eth_dev *priv)
781 u32 desc_num = priv->rx_currdescnum;
782 struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num];
783 uintptr_t desc_start = (uintptr_t)desc_p;
784 uintptr_t desc_end = desc_start +
785 roundup(sizeof(u32), ARCH_DMA_MINALIGN);
787 /* Make the current descriptor valid again */
788 desc_p->status |= BIT(31);
790 /* Flush Status field of descriptor */
791 flush_dcache_range(desc_start, desc_end);
793 /* Move to next desc and wrap-around condition. */
794 if (++desc_num >= CONFIG_RX_DESCR_NUM)
796 priv->rx_currdescnum = desc_num;
801 static int sun8i_eth_free_pkt(struct udevice *dev, uchar *packet,
804 struct emac_eth_dev *priv = dev_get_priv(dev);
806 return _sun8i_free_pkt(priv);
809 static void sun8i_emac_eth_stop(struct udevice *dev)
811 struct emac_eth_dev *priv = dev_get_priv(dev);
813 /* Stop Rx/Tx transmitter */
814 clrbits_le32(priv->mac_reg + EMAC_RX_CTL0, BIT(31));
815 clrbits_le32(priv->mac_reg + EMAC_TX_CTL0, BIT(31));
818 clrbits_le32(priv->mac_reg + EMAC_TX_CTL1, BIT(30));
820 phy_shutdown(priv->phydev);
823 static int sun8i_emac_eth_probe(struct udevice *dev)
825 struct sun8i_eth_pdata *sun8i_pdata = dev_get_platdata(dev);
826 struct eth_pdata *pdata = &sun8i_pdata->eth_pdata;
827 struct emac_eth_dev *priv = dev_get_priv(dev);
830 priv->mac_reg = (void *)pdata->iobase;
832 ret = sun8i_emac_board_setup(priv);
836 sun8i_emac_set_syscon(sun8i_pdata, priv);
838 sun8i_mdio_init(dev->name, dev);
839 priv->bus = miiphy_get_dev_by_name(dev->name);
841 return sun8i_phy_init(priv, dev);
844 static const struct eth_ops sun8i_emac_eth_ops = {
845 .start = sun8i_emac_eth_start,
846 .write_hwaddr = sun8i_eth_write_hwaddr,
847 .send = sun8i_emac_eth_send,
848 .recv = sun8i_emac_eth_recv,
849 .free_pkt = sun8i_eth_free_pkt,
850 .stop = sun8i_emac_eth_stop,
853 static int sun8i_get_ephy_nodes(struct emac_eth_dev *priv)
855 int emac_node, ephy_node, ret, ephy_handle;
857 emac_node = fdt_path_offset(gd->fdt_blob,
858 "/soc/ethernet@1c30000");
860 debug("failed to get emac node\n");
863 ephy_handle = fdtdec_lookup_phandle(gd->fdt_blob,
864 emac_node, "phy-handle");
866 /* look for mdio-mux node for internal PHY node */
867 ephy_node = fdt_path_offset(gd->fdt_blob,
868 "/soc/ethernet@1c30000/mdio-mux/mdio@1/ethernet-phy@1");
870 debug("failed to get mdio-mux with internal PHY\n");
874 /* This is not the phy we are looking for */
875 if (ephy_node != ephy_handle)
878 ret = fdt_node_check_compatible(gd->fdt_blob, ephy_node,
879 "allwinner,sun8i-h3-mdio-internal");
881 debug("failed to find mdio-internal node\n");
885 ret = clk_get_by_index_nodev(offset_to_ofnode(ephy_node), 0,
888 dev_err(dev, "failed to get EPHY TX clock\n");
892 ret = reset_get_by_index_nodev(offset_to_ofnode(ephy_node), 0,
895 dev_err(dev, "failed to get EPHY TX reset\n");
899 priv->use_internal_phy = true;
904 static int sun8i_emac_eth_ofdata_to_platdata(struct udevice *dev)
906 struct sun8i_eth_pdata *sun8i_pdata = dev_get_platdata(dev);
907 struct eth_pdata *pdata = &sun8i_pdata->eth_pdata;
908 struct emac_eth_dev *priv = dev_get_priv(dev);
909 const char *phy_mode;
911 int node = dev_of_offset(dev);
913 #if CONFIG_IS_ENABLED(DM_GPIO)
914 int reset_flags = GPIOD_IS_OUT;
918 pdata->iobase = devfdt_get_addr(dev);
919 if (pdata->iobase == FDT_ADDR_T_NONE) {
920 debug("%s: Cannot find MAC base address\n", __func__);
924 priv->variant = dev_get_driver_data(dev);
926 if (!priv->variant) {
927 printf("%s: Missing variant\n", __func__);
931 ret = clk_get_by_name(dev, "stmmaceth", &priv->tx_clk);
933 dev_err(dev, "failed to get TX clock\n");
937 ret = reset_get_by_name(dev, "stmmaceth", &priv->tx_rst);
938 if (ret && ret != -ENOENT) {
939 dev_err(dev, "failed to get TX reset\n");
943 offset = fdtdec_lookup_phandle(gd->fdt_blob, node, "syscon");
945 debug("%s: cannot find syscon node\n", __func__);
949 reg = fdt_getprop(gd->fdt_blob, offset, "reg", NULL);
951 debug("%s: cannot find reg property in syscon node\n",
955 priv->sysctl_reg = fdt_translate_address((void *)gd->fdt_blob,
957 if (priv->sysctl_reg == FDT_ADDR_T_NONE) {
958 debug("%s: Cannot find syscon base address\n", __func__);
962 pdata->phy_interface = -1;
964 priv->use_internal_phy = false;
966 offset = fdtdec_lookup_phandle(gd->fdt_blob, node, "phy-handle");
968 debug("%s: Cannot find PHY address\n", __func__);
971 priv->phyaddr = fdtdec_get_int(gd->fdt_blob, offset, "reg", -1);
973 phy_mode = fdt_getprop(gd->fdt_blob, node, "phy-mode", NULL);
976 pdata->phy_interface = phy_get_interface_by_name(phy_mode);
977 printf("phy interface%d\n", pdata->phy_interface);
979 if (pdata->phy_interface == -1) {
980 debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode);
984 if (priv->variant == H3_EMAC) {
985 ret = sun8i_get_ephy_nodes(priv);
990 priv->interface = pdata->phy_interface;
992 if (!priv->use_internal_phy)
995 sun8i_pdata->tx_delay_ps = fdtdec_get_int(gd->fdt_blob, node,
996 "allwinner,tx-delay-ps", 0);
997 if (sun8i_pdata->tx_delay_ps < 0 || sun8i_pdata->tx_delay_ps > 700)
998 printf("%s: Invalid TX delay value %d\n", __func__,
999 sun8i_pdata->tx_delay_ps);
1001 sun8i_pdata->rx_delay_ps = fdtdec_get_int(gd->fdt_blob, node,
1002 "allwinner,rx-delay-ps", 0);
1003 if (sun8i_pdata->rx_delay_ps < 0 || sun8i_pdata->rx_delay_ps > 3100)
1004 printf("%s: Invalid RX delay value %d\n", __func__,
1005 sun8i_pdata->rx_delay_ps);
1007 #if CONFIG_IS_ENABLED(DM_GPIO)
1008 if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
1009 "snps,reset-active-low"))
1010 reset_flags |= GPIOD_ACTIVE_LOW;
1012 ret = gpio_request_by_name(dev, "snps,reset-gpio", 0,
1013 &priv->reset_gpio, reset_flags);
1016 ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
1017 "snps,reset-delays-us",
1018 sun8i_pdata->reset_delays, 3);
1019 } else if (ret == -ENOENT) {
1027 static const struct udevice_id sun8i_emac_eth_ids[] = {
1028 {.compatible = "allwinner,sun8i-h3-emac", .data = (uintptr_t)H3_EMAC },
1029 {.compatible = "allwinner,sun50i-a64-emac",
1030 .data = (uintptr_t)A64_EMAC },
1031 {.compatible = "allwinner,sun8i-a83t-emac",
1032 .data = (uintptr_t)A83T_EMAC },
1033 {.compatible = "allwinner,sun8i-r40-gmac",
1034 .data = (uintptr_t)R40_GMAC },
1038 U_BOOT_DRIVER(eth_sun8i_emac) = {
1039 .name = "eth_sun8i_emac",
1041 .of_match = sun8i_emac_eth_ids,
1042 .ofdata_to_platdata = sun8i_emac_eth_ofdata_to_platdata,
1043 .probe = sun8i_emac_eth_probe,
1044 .ops = &sun8i_emac_eth_ops,
1045 .priv_auto_alloc_size = sizeof(struct emac_eth_dev),
1046 .platdata_auto_alloc_size = sizeof(struct sun8i_eth_pdata),
1047 .flags = DM_FLAG_ALLOC_PRIV_DMA,