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>
33 #if CONFIG_IS_ENABLED(DM_GPIO)
34 #include <asm-generic/gpio.h>
37 #define MDIO_CMD_MII_BUSY BIT(0)
38 #define MDIO_CMD_MII_WRITE BIT(1)
40 #define MDIO_CMD_MII_PHY_REG_ADDR_MASK 0x000001f0
41 #define MDIO_CMD_MII_PHY_REG_ADDR_SHIFT 4
42 #define MDIO_CMD_MII_PHY_ADDR_MASK 0x0001f000
43 #define MDIO_CMD_MII_PHY_ADDR_SHIFT 12
45 #define CONFIG_TX_DESCR_NUM 32
46 #define CONFIG_RX_DESCR_NUM 32
47 #define CONFIG_ETH_BUFSIZE 2048 /* Note must be dma aligned */
50 * The datasheet says that each descriptor can transfers up to 4096 bytes
51 * But later, the register documentation reduces that value to 2048,
52 * using 2048 cause strange behaviours and even BSP driver use 2047
54 #define CONFIG_ETH_RXSIZE 2044 /* Note must fit in ETH_BUFSIZE */
56 #define TX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_TX_DESCR_NUM)
57 #define RX_TOTAL_BUFSIZE (CONFIG_ETH_BUFSIZE * CONFIG_RX_DESCR_NUM)
59 #define H3_EPHY_DEFAULT_VALUE 0x58000
60 #define H3_EPHY_DEFAULT_MASK GENMASK(31, 15)
61 #define H3_EPHY_ADDR_SHIFT 20
62 #define REG_PHY_ADDR_MASK GENMASK(4, 0)
63 #define H3_EPHY_LED_POL BIT(17) /* 1: active low, 0: active high */
64 #define H3_EPHY_SHUTDOWN BIT(16) /* 1: shutdown, 0: power up */
65 #define H3_EPHY_SELECT BIT(15) /* 1: internal PHY, 0: external PHY */
67 #define SC_RMII_EN BIT(13)
68 #define SC_EPIT BIT(2) /* 1: RGMII, 0: MII */
69 #define SC_ETCS_MASK GENMASK(1, 0)
70 #define SC_ETCS_EXT_GMII 0x1
71 #define SC_ETCS_INT_GMII 0x2
72 #define SC_ETXDC_MASK GENMASK(12, 10)
73 #define SC_ETXDC_OFFSET 10
74 #define SC_ERXDC_MASK GENMASK(9, 5)
75 #define SC_ERXDC_OFFSET 5
77 #define CONFIG_MDIO_TIMEOUT (3 * CONFIG_SYS_HZ)
79 #define AHB_GATE_OFFSET_EPHY 0
82 #define SUN8I_IOMUX_H3 2
83 #define SUN8I_IOMUX_R40 5
86 /* H3/A64 EMAC Register's offset */
87 #define EMAC_CTL0 0x00
88 #define EMAC_CTL0_FULL_DUPLEX BIT(0)
89 #define EMAC_CTL0_SPEED_MASK GENMASK(3, 2)
90 #define EMAC_CTL0_SPEED_10 (0x2 << 2)
91 #define EMAC_CTL0_SPEED_100 (0x3 << 2)
92 #define EMAC_CTL0_SPEED_1000 (0x0 << 2)
93 #define EMAC_CTL1 0x04
94 #define EMAC_CTL1_SOFT_RST BIT(0)
95 #define EMAC_CTL1_BURST_LEN_SHIFT 24
96 #define EMAC_INT_STA 0x08
97 #define EMAC_INT_EN 0x0c
98 #define EMAC_TX_CTL0 0x10
99 #define EMAC_TX_CTL0_TX_EN BIT(31)
100 #define EMAC_TX_CTL1 0x14
101 #define EMAC_TX_CTL1_TX_MD BIT(1)
102 #define EMAC_TX_CTL1_TX_DMA_EN BIT(30)
103 #define EMAC_TX_CTL1_TX_DMA_START BIT(31)
104 #define EMAC_TX_FLOW_CTL 0x1c
105 #define EMAC_TX_DMA_DESC 0x20
106 #define EMAC_RX_CTL0 0x24
107 #define EMAC_RX_CTL0_RX_EN BIT(31)
108 #define EMAC_RX_CTL1 0x28
109 #define EMAC_RX_CTL1_RX_MD BIT(1)
110 #define EMAC_RX_CTL1_RX_RUNT_FRM BIT(2)
111 #define EMAC_RX_CTL1_RX_ERR_FRM BIT(3)
112 #define EMAC_RX_CTL1_RX_DMA_EN BIT(30)
113 #define EMAC_RX_CTL1_RX_DMA_START BIT(31)
114 #define EMAC_RX_DMA_DESC 0x34
115 #define EMAC_MII_CMD 0x48
116 #define EMAC_MII_DATA 0x4c
117 #define EMAC_ADDR0_HIGH 0x50
118 #define EMAC_ADDR0_LOW 0x54
119 #define EMAC_TX_DMA_STA 0xb0
120 #define EMAC_TX_CUR_DESC 0xb4
121 #define EMAC_TX_CUR_BUF 0xb8
122 #define EMAC_RX_DMA_STA 0xc0
123 #define EMAC_RX_CUR_DESC 0xc4
125 #define EMAC_DESC_OWN_DMA BIT(31)
126 #define EMAC_DESC_LAST_DESC BIT(30)
127 #define EMAC_DESC_FIRST_DESC BIT(29)
128 #define EMAC_DESC_CHAIN_SECOND BIT(24)
130 #define EMAC_DESC_RX_ERROR_MASK 0x400068db
132 DECLARE_GLOBAL_DATA_PTR;
142 struct emac_dma_desc {
147 } __aligned(ARCH_DMA_MINALIGN);
149 struct emac_eth_dev {
150 struct emac_dma_desc rx_chain[CONFIG_TX_DESCR_NUM];
151 struct emac_dma_desc tx_chain[CONFIG_RX_DESCR_NUM];
152 char rxbuffer[RX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
153 char txbuffer[TX_TOTAL_BUFSIZE] __aligned(ARCH_DMA_MINALIGN);
165 bool use_internal_phy;
167 enum emac_variant variant;
169 phys_addr_t sysctl_reg;
170 struct phy_device *phydev;
174 struct reset_ctl tx_rst;
175 struct reset_ctl ephy_rst;
176 #if CONFIG_IS_ENABLED(DM_GPIO)
177 struct gpio_desc reset_gpio;
182 struct sun8i_eth_pdata {
183 struct eth_pdata eth_pdata;
190 static int sun8i_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
192 struct udevice *dev = bus->priv;
193 struct emac_eth_dev *priv = dev_get_priv(dev);
197 mii_cmd = (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) &
198 MDIO_CMD_MII_PHY_REG_ADDR_MASK;
199 mii_cmd |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) &
200 MDIO_CMD_MII_PHY_ADDR_MASK;
202 mii_cmd |= MDIO_CMD_MII_BUSY;
204 writel(mii_cmd, priv->mac_reg + EMAC_MII_CMD);
206 ret = wait_for_bit_le32(priv->mac_reg + EMAC_MII_CMD,
207 MDIO_CMD_MII_BUSY, false,
208 CONFIG_MDIO_TIMEOUT, true);
212 return readl(priv->mac_reg + EMAC_MII_DATA);
215 static int sun8i_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
218 struct udevice *dev = bus->priv;
219 struct emac_eth_dev *priv = dev_get_priv(dev);
222 mii_cmd = (reg << MDIO_CMD_MII_PHY_REG_ADDR_SHIFT) &
223 MDIO_CMD_MII_PHY_REG_ADDR_MASK;
224 mii_cmd |= (addr << MDIO_CMD_MII_PHY_ADDR_SHIFT) &
225 MDIO_CMD_MII_PHY_ADDR_MASK;
227 mii_cmd |= MDIO_CMD_MII_WRITE;
228 mii_cmd |= MDIO_CMD_MII_BUSY;
230 writel(val, priv->mac_reg + EMAC_MII_DATA);
231 writel(mii_cmd, priv->mac_reg + EMAC_MII_CMD);
233 return wait_for_bit_le32(priv->mac_reg + EMAC_MII_CMD,
234 MDIO_CMD_MII_BUSY, false,
235 CONFIG_MDIO_TIMEOUT, true);
238 static int sun8i_eth_write_hwaddr(struct udevice *dev)
240 struct emac_eth_dev *priv = dev_get_priv(dev);
241 struct eth_pdata *pdata = dev_get_platdata(dev);
242 uchar *mac_id = pdata->enetaddr;
243 u32 macid_lo, macid_hi;
245 macid_lo = mac_id[0] + (mac_id[1] << 8) + (mac_id[2] << 16) +
247 macid_hi = mac_id[4] + (mac_id[5] << 8);
249 writel(macid_hi, priv->mac_reg + EMAC_ADDR0_HIGH);
250 writel(macid_lo, priv->mac_reg + EMAC_ADDR0_LOW);
255 static void sun8i_adjust_link(struct emac_eth_dev *priv,
256 struct phy_device *phydev)
260 v = readl(priv->mac_reg + EMAC_CTL0);
263 v |= EMAC_CTL0_FULL_DUPLEX;
265 v &= ~EMAC_CTL0_FULL_DUPLEX;
267 v &= ~EMAC_CTL0_SPEED_MASK;
269 switch (phydev->speed) {
271 v |= EMAC_CTL0_SPEED_1000;
274 v |= EMAC_CTL0_SPEED_100;
277 v |= EMAC_CTL0_SPEED_10;
280 writel(v, priv->mac_reg + EMAC_CTL0);
283 static int sun8i_emac_set_syscon_ephy(struct emac_eth_dev *priv, u32 *reg)
285 if (priv->use_internal_phy) {
286 /* H3 based SoC's that has an Internal 100MBit PHY
287 * needs to be configured and powered up before use
289 *reg &= ~H3_EPHY_DEFAULT_MASK;
290 *reg |= H3_EPHY_DEFAULT_VALUE;
291 *reg |= priv->phyaddr << H3_EPHY_ADDR_SHIFT;
292 *reg &= ~H3_EPHY_SHUTDOWN;
293 *reg |= H3_EPHY_SELECT;
295 /* This is to select External Gigabit PHY on
296 * the boards with H3 SoC.
298 *reg &= ~H3_EPHY_SELECT;
303 static int sun8i_emac_set_syscon(struct sun8i_eth_pdata *pdata,
304 struct emac_eth_dev *priv)
309 if (priv->variant == R40_GMAC) {
310 /* Select RGMII for R40 */
311 reg = readl(priv->sysctl_reg + 0x164);
312 reg |= SC_ETCS_INT_GMII |
314 (CONFIG_GMAC_TX_DELAY << SC_ETXDC_OFFSET);
316 writel(reg, priv->sysctl_reg + 0x164);
320 reg = readl(priv->sysctl_reg + 0x30);
322 if (priv->variant == H3_EMAC || priv->variant == H6_EMAC) {
323 ret = sun8i_emac_set_syscon_ephy(priv, ®);
328 reg &= ~(SC_ETCS_MASK | SC_EPIT);
329 if (priv->variant == H3_EMAC ||
330 priv->variant == A64_EMAC ||
331 priv->variant == H6_EMAC)
334 switch (priv->interface) {
335 case PHY_INTERFACE_MODE_MII:
338 case PHY_INTERFACE_MODE_RGMII:
339 reg |= SC_EPIT | SC_ETCS_INT_GMII;
341 case PHY_INTERFACE_MODE_RMII:
342 if (priv->variant == H3_EMAC ||
343 priv->variant == A64_EMAC ||
344 priv->variant == H6_EMAC) {
345 reg |= SC_RMII_EN | SC_ETCS_EXT_GMII;
348 /* RMII not supported on A83T */
350 debug("%s: Invalid PHY interface\n", __func__);
354 if (pdata->tx_delay_ps)
355 reg |= ((pdata->tx_delay_ps / 100) << SC_ETXDC_OFFSET)
358 if (pdata->rx_delay_ps)
359 reg |= ((pdata->rx_delay_ps / 100) << SC_ERXDC_OFFSET)
362 writel(reg, priv->sysctl_reg + 0x30);
367 static int sun8i_phy_init(struct emac_eth_dev *priv, void *dev)
369 struct phy_device *phydev;
371 phydev = phy_connect(priv->bus, priv->phyaddr, dev, priv->interface);
375 phy_connect_dev(phydev, dev);
377 priv->phydev = phydev;
378 phy_config(priv->phydev);
383 #define cache_clean_descriptor(desc) \
384 flush_dcache_range((uintptr_t)(desc), \
385 (uintptr_t)(desc) + sizeof(struct emac_dma_desc))
387 #define cache_inv_descriptor(desc) \
388 invalidate_dcache_range((uintptr_t)(desc), \
389 (uintptr_t)(desc) + sizeof(struct emac_dma_desc))
391 static void rx_descs_init(struct emac_eth_dev *priv)
393 struct emac_dma_desc *desc_table_p = &priv->rx_chain[0];
394 char *rxbuffs = &priv->rxbuffer[0];
395 struct emac_dma_desc *desc_p;
399 * Make sure we don't have dirty cache lines around, which could
400 * be cleaned to DRAM *after* the MAC has already written data to it.
402 invalidate_dcache_range((uintptr_t)desc_table_p,
403 (uintptr_t)desc_table_p + sizeof(priv->rx_chain));
404 invalidate_dcache_range((uintptr_t)rxbuffs,
405 (uintptr_t)rxbuffs + sizeof(priv->rxbuffer));
407 for (i = 0; i < CONFIG_RX_DESCR_NUM; i++) {
408 desc_p = &desc_table_p[i];
409 desc_p->buf_addr = (uintptr_t)&rxbuffs[i * CONFIG_ETH_BUFSIZE];
410 desc_p->next = (uintptr_t)&desc_table_p[i + 1];
411 desc_p->ctl_size = CONFIG_ETH_RXSIZE;
412 desc_p->status = EMAC_DESC_OWN_DMA;
415 /* Correcting the last pointer of the chain */
416 desc_p->next = (uintptr_t)&desc_table_p[0];
418 flush_dcache_range((uintptr_t)priv->rx_chain,
419 (uintptr_t)priv->rx_chain +
420 sizeof(priv->rx_chain));
422 writel((uintptr_t)&desc_table_p[0], (priv->mac_reg + EMAC_RX_DMA_DESC));
423 priv->rx_currdescnum = 0;
426 static void tx_descs_init(struct emac_eth_dev *priv)
428 struct emac_dma_desc *desc_table_p = &priv->tx_chain[0];
429 char *txbuffs = &priv->txbuffer[0];
430 struct emac_dma_desc *desc_p;
433 for (i = 0; i < CONFIG_TX_DESCR_NUM; i++) {
434 desc_p = &desc_table_p[i];
435 desc_p->buf_addr = (uintptr_t)&txbuffs[i * CONFIG_ETH_BUFSIZE];
436 desc_p->next = (uintptr_t)&desc_table_p[i + 1];
437 desc_p->ctl_size = 0;
441 /* Correcting the last pointer of the chain */
442 desc_p->next = (uintptr_t)&desc_table_p[0];
444 /* Flush the first TX buffer descriptor we will tell the MAC about. */
445 cache_clean_descriptor(desc_table_p);
447 writel((uintptr_t)&desc_table_p[0], priv->mac_reg + EMAC_TX_DMA_DESC);
448 priv->tx_currdescnum = 0;
451 static int sun8i_emac_eth_start(struct udevice *dev)
453 struct emac_eth_dev *priv = dev_get_priv(dev);
457 writel(EMAC_CTL1_SOFT_RST, priv->mac_reg + EMAC_CTL1);
458 ret = wait_for_bit_le32(priv->mac_reg + EMAC_CTL1,
459 EMAC_CTL1_SOFT_RST, false, 10, true);
461 printf("%s: Timeout\n", __func__);
465 /* Rewrite mac address after reset */
466 sun8i_eth_write_hwaddr(dev);
468 /* transmission starts after the full frame arrived in TX DMA FIFO */
469 setbits_le32(priv->mac_reg + EMAC_TX_CTL1, EMAC_TX_CTL1_TX_MD);
472 * RX DMA reads data from RX DMA FIFO to host memory after a
473 * complete frame has been written to RX DMA FIFO
475 setbits_le32(priv->mac_reg + EMAC_RX_CTL1, EMAC_RX_CTL1_RX_MD);
477 /* DMA burst length */
478 writel(8 << EMAC_CTL1_BURST_LEN_SHIFT, priv->mac_reg + EMAC_CTL1);
480 /* Initialize rx/tx descriptors */
485 ret = phy_startup(priv->phydev);
489 sun8i_adjust_link(priv, priv->phydev);
491 /* Start RX/TX DMA */
492 setbits_le32(priv->mac_reg + EMAC_RX_CTL1, EMAC_RX_CTL1_RX_DMA_EN |
493 EMAC_RX_CTL1_RX_ERR_FRM | EMAC_RX_CTL1_RX_RUNT_FRM);
494 setbits_le32(priv->mac_reg + EMAC_TX_CTL1, EMAC_TX_CTL1_TX_DMA_EN);
497 setbits_le32(priv->mac_reg + EMAC_RX_CTL0, EMAC_RX_CTL0_RX_EN);
498 setbits_le32(priv->mac_reg + EMAC_TX_CTL0, EMAC_TX_CTL0_TX_EN);
503 static int parse_phy_pins(struct udevice *dev)
505 struct emac_eth_dev *priv = dev_get_priv(dev);
507 const char *pin_name;
508 int drive, pull = SUN4I_PINCTRL_NO_PULL, i;
510 offset = fdtdec_lookup_phandle(gd->fdt_blob, dev_of_offset(dev),
513 printf("WARNING: emac: cannot find pinctrl-0 node\n");
517 drive = fdt_getprop_u32_default_node(gd->fdt_blob, offset, 0,
518 "drive-strength", ~0);
521 drive = SUN4I_PINCTRL_10_MA;
522 else if (drive <= 20)
523 drive = SUN4I_PINCTRL_20_MA;
524 else if (drive <= 30)
525 drive = SUN4I_PINCTRL_30_MA;
527 drive = SUN4I_PINCTRL_40_MA;
530 if (fdt_get_property(gd->fdt_blob, offset, "bias-pull-up", NULL))
531 pull = SUN4I_PINCTRL_PULL_UP;
532 else if (fdt_get_property(gd->fdt_blob, offset, "bias-pull-down", NULL))
533 pull = SUN4I_PINCTRL_PULL_DOWN;
538 pin_name = fdt_stringlist_get(gd->fdt_blob, offset,
543 pin = sunxi_name_to_gpio(pin_name);
547 if (priv->variant == H3_EMAC)
548 sunxi_gpio_set_cfgpin(pin, SUN8I_IOMUX_H3);
549 else if (priv->variant == R40_GMAC || priv->variant == H6_EMAC)
550 sunxi_gpio_set_cfgpin(pin, SUN8I_IOMUX_R40);
552 sunxi_gpio_set_cfgpin(pin, SUN8I_IOMUX);
555 sunxi_gpio_set_drv(pin, drive);
557 sunxi_gpio_set_pull(pin, pull);
561 printf("WARNING: emac: cannot find pins property\n");
568 static int sun8i_emac_eth_recv(struct udevice *dev, int flags, uchar **packetp)
570 struct emac_eth_dev *priv = dev_get_priv(dev);
571 u32 status, desc_num = priv->rx_currdescnum;
572 struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num];
573 uintptr_t data_start = (uintptr_t)desc_p->buf_addr;
576 /* Invalidate entire buffer descriptor */
577 cache_inv_descriptor(desc_p);
579 status = desc_p->status;
581 /* Check for DMA own bit */
582 if (status & EMAC_DESC_OWN_DMA)
585 length = (status >> 16) & 0x3fff;
587 /* make sure we read from DRAM, not our cache */
588 invalidate_dcache_range(data_start,
589 data_start + roundup(length, ARCH_DMA_MINALIGN));
591 if (status & EMAC_DESC_RX_ERROR_MASK) {
592 debug("RX: packet error: 0x%x\n",
593 status & EMAC_DESC_RX_ERROR_MASK);
597 debug("RX: Bad Packet (runt)\n");
601 if (length > CONFIG_ETH_RXSIZE) {
602 debug("RX: Too large packet (%d bytes)\n", length);
606 *packetp = (uchar *)(ulong)desc_p->buf_addr;
611 static int sun8i_emac_eth_send(struct udevice *dev, void *packet, int length)
613 struct emac_eth_dev *priv = dev_get_priv(dev);
614 u32 desc_num = priv->tx_currdescnum;
615 struct emac_dma_desc *desc_p = &priv->tx_chain[desc_num];
616 uintptr_t data_start = (uintptr_t)desc_p->buf_addr;
617 uintptr_t data_end = data_start +
618 roundup(length, ARCH_DMA_MINALIGN);
620 desc_p->ctl_size = length | EMAC_DESC_CHAIN_SECOND;
622 memcpy((void *)data_start, packet, length);
624 /* Flush data to be sent */
625 flush_dcache_range(data_start, data_end);
627 /* frame begin and end */
628 desc_p->ctl_size |= EMAC_DESC_LAST_DESC | EMAC_DESC_FIRST_DESC;
629 desc_p->status = EMAC_DESC_OWN_DMA;
631 /* make sure the MAC reads the actual data from DRAM */
632 cache_clean_descriptor(desc_p);
634 /* Move to next Descriptor and wrap around */
635 if (++desc_num >= CONFIG_TX_DESCR_NUM)
637 priv->tx_currdescnum = desc_num;
640 setbits_le32(priv->mac_reg + EMAC_TX_CTL1, EMAC_TX_CTL1_TX_DMA_START);
643 * Since we copied the data above, we return here without waiting
644 * for the packet to be actually send out.
650 static int sun8i_emac_board_setup(struct udevice *dev,
651 struct emac_eth_dev *priv)
655 ret = clk_enable(&priv->tx_clk);
657 dev_err(dev, "failed to enable TX clock\n");
661 if (reset_valid(&priv->tx_rst)) {
662 ret = reset_deassert(&priv->tx_rst);
664 dev_err(dev, "failed to deassert TX reset\n");
669 /* Only H3/H5 have clock controls for internal EPHY */
670 if (clk_valid(&priv->ephy_clk)) {
671 ret = clk_enable(&priv->ephy_clk);
673 dev_err(dev, "failed to enable EPHY TX clock\n");
678 if (reset_valid(&priv->ephy_rst)) {
679 ret = reset_deassert(&priv->ephy_rst);
681 dev_err(dev, "failed to deassert EPHY TX clock\n");
689 clk_disable(&priv->tx_clk);
693 #if CONFIG_IS_ENABLED(DM_GPIO)
694 static int sun8i_mdio_reset(struct mii_dev *bus)
696 struct udevice *dev = bus->priv;
697 struct emac_eth_dev *priv = dev_get_priv(dev);
698 struct sun8i_eth_pdata *pdata = dev_get_platdata(dev);
701 if (!dm_gpio_is_valid(&priv->reset_gpio))
705 ret = dm_gpio_set_value(&priv->reset_gpio, 0);
709 udelay(pdata->reset_delays[0]);
711 ret = dm_gpio_set_value(&priv->reset_gpio, 1);
715 udelay(pdata->reset_delays[1]);
717 ret = dm_gpio_set_value(&priv->reset_gpio, 0);
721 udelay(pdata->reset_delays[2]);
727 static int sun8i_mdio_init(const char *name, struct udevice *priv)
729 struct mii_dev *bus = mdio_alloc();
732 debug("Failed to allocate MDIO bus\n");
736 bus->read = sun8i_mdio_read;
737 bus->write = sun8i_mdio_write;
738 snprintf(bus->name, sizeof(bus->name), name);
739 bus->priv = (void *)priv;
740 #if CONFIG_IS_ENABLED(DM_GPIO)
741 bus->reset = sun8i_mdio_reset;
744 return mdio_register(bus);
747 static int sun8i_eth_free_pkt(struct udevice *dev, uchar *packet,
750 struct emac_eth_dev *priv = dev_get_priv(dev);
751 u32 desc_num = priv->rx_currdescnum;
752 struct emac_dma_desc *desc_p = &priv->rx_chain[desc_num];
754 /* give the current descriptor back to the MAC */
755 desc_p->status |= EMAC_DESC_OWN_DMA;
757 /* Flush Status field of descriptor */
758 cache_clean_descriptor(desc_p);
760 /* Move to next desc and wrap-around condition. */
761 if (++desc_num >= CONFIG_RX_DESCR_NUM)
763 priv->rx_currdescnum = desc_num;
768 static void sun8i_emac_eth_stop(struct udevice *dev)
770 struct emac_eth_dev *priv = dev_get_priv(dev);
772 /* Stop Rx/Tx transmitter */
773 clrbits_le32(priv->mac_reg + EMAC_RX_CTL0, EMAC_RX_CTL0_RX_EN);
774 clrbits_le32(priv->mac_reg + EMAC_TX_CTL0, EMAC_TX_CTL0_TX_EN);
777 clrbits_le32(priv->mac_reg + EMAC_TX_CTL1, EMAC_TX_CTL1_TX_DMA_EN);
778 clrbits_le32(priv->mac_reg + EMAC_RX_CTL1, EMAC_RX_CTL1_RX_DMA_EN);
780 phy_shutdown(priv->phydev);
783 static int sun8i_emac_eth_probe(struct udevice *dev)
785 struct sun8i_eth_pdata *sun8i_pdata = dev_get_platdata(dev);
786 struct eth_pdata *pdata = &sun8i_pdata->eth_pdata;
787 struct emac_eth_dev *priv = dev_get_priv(dev);
790 priv->mac_reg = (void *)pdata->iobase;
792 ret = sun8i_emac_board_setup(dev, priv);
796 sun8i_emac_set_syscon(sun8i_pdata, priv);
798 sun8i_mdio_init(dev->name, dev);
799 priv->bus = miiphy_get_dev_by_name(dev->name);
801 return sun8i_phy_init(priv, dev);
804 static const struct eth_ops sun8i_emac_eth_ops = {
805 .start = sun8i_emac_eth_start,
806 .write_hwaddr = sun8i_eth_write_hwaddr,
807 .send = sun8i_emac_eth_send,
808 .recv = sun8i_emac_eth_recv,
809 .free_pkt = sun8i_eth_free_pkt,
810 .stop = sun8i_emac_eth_stop,
813 static int sun8i_handle_internal_phy(struct udevice *dev, struct emac_eth_dev *priv)
815 struct ofnode_phandle_args phandle;
818 ret = ofnode_parse_phandle_with_args(dev_ofnode(dev), "phy-handle",
819 NULL, 0, 0, &phandle);
823 /* If the PHY node is not a child of the internal MDIO bus, we are
824 * using some external PHY.
826 if (!ofnode_device_is_compatible(ofnode_get_parent(phandle.node),
827 "allwinner,sun8i-h3-mdio-internal"))
830 ret = clk_get_by_index_nodev(phandle.node, 0, &priv->ephy_clk);
832 dev_err(dev, "failed to get EPHY TX clock\n");
836 ret = reset_get_by_index_nodev(phandle.node, 0, &priv->ephy_rst);
838 dev_err(dev, "failed to get EPHY TX reset\n");
842 priv->use_internal_phy = true;
847 static int sun8i_emac_eth_ofdata_to_platdata(struct udevice *dev)
849 struct sun8i_eth_pdata *sun8i_pdata = dev_get_platdata(dev);
850 struct eth_pdata *pdata = &sun8i_pdata->eth_pdata;
851 struct emac_eth_dev *priv = dev_get_priv(dev);
852 const char *phy_mode;
854 int node = dev_of_offset(dev);
856 #if CONFIG_IS_ENABLED(DM_GPIO)
857 int reset_flags = GPIOD_IS_OUT;
861 pdata->iobase = dev_read_addr(dev);
862 if (pdata->iobase == FDT_ADDR_T_NONE) {
863 debug("%s: Cannot find MAC base address\n", __func__);
867 priv->variant = dev_get_driver_data(dev);
869 if (!priv->variant) {
870 printf("%s: Missing variant\n", __func__);
874 ret = clk_get_by_name(dev, "stmmaceth", &priv->tx_clk);
876 dev_err(dev, "failed to get TX clock\n");
880 ret = reset_get_by_name(dev, "stmmaceth", &priv->tx_rst);
881 if (ret && ret != -ENOENT) {
882 dev_err(dev, "failed to get TX reset\n");
886 offset = fdtdec_lookup_phandle(gd->fdt_blob, node, "syscon");
888 debug("%s: cannot find syscon node\n", __func__);
892 reg = fdt_getprop(gd->fdt_blob, offset, "reg", NULL);
894 debug("%s: cannot find reg property in syscon node\n",
898 priv->sysctl_reg = fdt_translate_address((void *)gd->fdt_blob,
900 if (priv->sysctl_reg == FDT_ADDR_T_NONE) {
901 debug("%s: Cannot find syscon base address\n", __func__);
905 pdata->phy_interface = -1;
907 priv->use_internal_phy = false;
909 offset = fdtdec_lookup_phandle(gd->fdt_blob, node, "phy-handle");
911 debug("%s: Cannot find PHY address\n", __func__);
914 priv->phyaddr = fdtdec_get_int(gd->fdt_blob, offset, "reg", -1);
916 phy_mode = fdt_getprop(gd->fdt_blob, node, "phy-mode", NULL);
919 pdata->phy_interface = phy_get_interface_by_name(phy_mode);
920 printf("phy interface%d\n", pdata->phy_interface);
922 if (pdata->phy_interface == -1) {
923 debug("%s: Invalid PHY interface '%s'\n", __func__, phy_mode);
927 if (priv->variant == H3_EMAC) {
928 ret = sun8i_handle_internal_phy(dev, priv);
933 priv->interface = pdata->phy_interface;
935 if (!priv->use_internal_phy)
938 sun8i_pdata->tx_delay_ps = fdtdec_get_int(gd->fdt_blob, node,
939 "allwinner,tx-delay-ps", 0);
940 if (sun8i_pdata->tx_delay_ps < 0 || sun8i_pdata->tx_delay_ps > 700)
941 printf("%s: Invalid TX delay value %d\n", __func__,
942 sun8i_pdata->tx_delay_ps);
944 sun8i_pdata->rx_delay_ps = fdtdec_get_int(gd->fdt_blob, node,
945 "allwinner,rx-delay-ps", 0);
946 if (sun8i_pdata->rx_delay_ps < 0 || sun8i_pdata->rx_delay_ps > 3100)
947 printf("%s: Invalid RX delay value %d\n", __func__,
948 sun8i_pdata->rx_delay_ps);
950 #if CONFIG_IS_ENABLED(DM_GPIO)
951 if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
952 "snps,reset-active-low"))
953 reset_flags |= GPIOD_ACTIVE_LOW;
955 ret = gpio_request_by_name(dev, "snps,reset-gpio", 0,
956 &priv->reset_gpio, reset_flags);
959 ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
960 "snps,reset-delays-us",
961 sun8i_pdata->reset_delays, 3);
962 } else if (ret == -ENOENT) {
970 static const struct udevice_id sun8i_emac_eth_ids[] = {
971 {.compatible = "allwinner,sun8i-h3-emac", .data = (uintptr_t)H3_EMAC },
972 {.compatible = "allwinner,sun50i-a64-emac",
973 .data = (uintptr_t)A64_EMAC },
974 {.compatible = "allwinner,sun8i-a83t-emac",
975 .data = (uintptr_t)A83T_EMAC },
976 {.compatible = "allwinner,sun8i-r40-gmac",
977 .data = (uintptr_t)R40_GMAC },
978 {.compatible = "allwinner,sun50i-h6-emac",
979 .data = (uintptr_t)H6_EMAC },
983 U_BOOT_DRIVER(eth_sun8i_emac) = {
984 .name = "eth_sun8i_emac",
986 .of_match = sun8i_emac_eth_ids,
987 .ofdata_to_platdata = sun8i_emac_eth_ofdata_to_platdata,
988 .probe = sun8i_emac_eth_probe,
989 .ops = &sun8i_emac_eth_ops,
990 .priv_auto_alloc_size = sizeof(struct emac_eth_dev),
991 .platdata_auto_alloc_size = sizeof(struct sun8i_eth_pdata),
992 .flags = DM_FLAG_ALLOC_PRIV_DMA,