1 // SPDX-License-Identifier: GPL-2.0+
3 * sunxi_emac.c -- Allwinner A10 ethernet driver
5 * (C) Copyright 2012, Stefan Roese <sr@denx.de>
10 #include <linux/err.h>
15 #include <asm/arch/clock.h>
16 #include <asm/arch/gpio.h>
21 u32 tx_mode; /* 0x04 */
22 u32 tx_flow; /* 0x08 */
23 u32 tx_ctl0; /* 0x0c */
24 u32 tx_ctl1; /* 0x10 */
25 u32 tx_ins; /* 0x14 */
26 u32 tx_pl0; /* 0x18 */
27 u32 tx_pl1; /* 0x1c */
28 u32 tx_sta; /* 0x20 */
29 u32 tx_io_data; /* 0x24 */
30 u32 tx_io_data1;/* 0x28 */
31 u32 tx_tsvl0; /* 0x2c */
32 u32 tx_tsvh0; /* 0x30 */
33 u32 tx_tsvl1; /* 0x34 */
34 u32 tx_tsvh1; /* 0x38 */
35 u32 rx_ctl; /* 0x3c */
36 u32 rx_hash0; /* 0x40 */
37 u32 rx_hash1; /* 0x44 */
38 u32 rx_sta; /* 0x48 */
39 u32 rx_io_data; /* 0x4c */
40 u32 rx_fbc; /* 0x50 */
41 u32 int_ctl; /* 0x54 */
42 u32 int_sta; /* 0x58 */
43 u32 mac_ctl0; /* 0x5c */
44 u32 mac_ctl1; /* 0x60 */
45 u32 mac_ipgt; /* 0x64 */
46 u32 mac_ipgr; /* 0x68 */
47 u32 mac_clrt; /* 0x6c */
48 u32 mac_maxf; /* 0x70 */
49 u32 mac_supp; /* 0x74 */
50 u32 mac_test; /* 0x78 */
51 u32 mac_mcfg; /* 0x7c */
52 u32 mac_mcmd; /* 0x80 */
53 u32 mac_madr; /* 0x84 */
54 u32 mac_mwtd; /* 0x88 */
55 u32 mac_mrdd; /* 0x8c */
56 u32 mac_mind; /* 0x90 */
57 u32 mac_ssrr; /* 0x94 */
58 u32 mac_a0; /* 0x98 */
59 u32 mac_a1; /* 0x9c */
63 struct sunxi_sramc_regs {
68 /* 0: Disable 1: Aborted frame enable(default) */
69 #define EMAC_TX_AB_M (0x1 << 0)
70 /* 0: CPU 1: DMA(default) */
71 #define EMAC_TX_TM (0x1 << 1)
73 #define EMAC_TX_SETUP (0)
75 /* 0: DRQ asserted 1: DRQ automatically(default) */
76 #define EMAC_RX_DRQ_MODE (0x1 << 1)
77 /* 0: CPU 1: DMA(default) */
78 #define EMAC_RX_TM (0x1 << 2)
79 /* 0: Normal(default) 1: Pass all Frames */
80 #define EMAC_RX_PA (0x1 << 4)
81 /* 0: Normal(default) 1: Pass Control Frames */
82 #define EMAC_RX_PCF (0x1 << 5)
83 /* 0: Normal(default) 1: Pass Frames with CRC Error */
84 #define EMAC_RX_PCRCE (0x1 << 6)
85 /* 0: Normal(default) 1: Pass Frames with Length Error */
86 #define EMAC_RX_PLE (0x1 << 7)
87 /* 0: Normal 1: Pass Frames length out of range(default) */
88 #define EMAC_RX_POR (0x1 << 8)
89 /* 0: Not accept 1: Accept unicast Packets(default) */
90 #define EMAC_RX_UCAD (0x1 << 16)
91 /* 0: Normal(default) 1: DA Filtering */
92 #define EMAC_RX_DAF (0x1 << 17)
93 /* 0: Not accept 1: Accept multicast Packets(default) */
94 #define EMAC_RX_MCO (0x1 << 20)
95 /* 0: Disable(default) 1: Enable Hash filter */
96 #define EMAC_RX_MHF (0x1 << 21)
97 /* 0: Not accept 1: Accept Broadcast Packets(default) */
98 #define EMAC_RX_BCO (0x1 << 22)
99 /* 0: Disable(default) 1: Enable SA Filtering */
100 #define EMAC_RX_SAF (0x1 << 24)
101 /* 0: Normal(default) 1: Inverse Filtering */
102 #define EMAC_RX_SAIF (0x1 << 25)
104 #define EMAC_RX_SETUP (EMAC_RX_POR | EMAC_RX_UCAD | EMAC_RX_DAF | \
105 EMAC_RX_MCO | EMAC_RX_BCO)
107 /* 0: Disable 1: Enable Receive Flow Control(default) */
108 #define EMAC_MAC_CTL0_RFC (0x1 << 2)
109 /* 0: Disable 1: Enable Transmit Flow Control(default) */
110 #define EMAC_MAC_CTL0_TFC (0x1 << 3)
112 #define EMAC_MAC_CTL0_SETUP (EMAC_MAC_CTL0_RFC | EMAC_MAC_CTL0_TFC)
114 /* 0: Disable 1: Enable MAC Frame Length Checking(default) */
115 #define EMAC_MAC_CTL1_FLC (0x1 << 1)
116 /* 0: Disable(default) 1: Enable Huge Frame */
117 #define EMAC_MAC_CTL1_HF (0x1 << 2)
118 /* 0: Disable(default) 1: Enable MAC Delayed CRC */
119 #define EMAC_MAC_CTL1_DCRC (0x1 << 3)
120 /* 0: Disable 1: Enable MAC CRC(default) */
121 #define EMAC_MAC_CTL1_CRC (0x1 << 4)
122 /* 0: Disable 1: Enable MAC PAD Short frames(default) */
123 #define EMAC_MAC_CTL1_PC (0x1 << 5)
124 /* 0: Disable(default) 1: Enable MAC PAD Short frames and append CRC */
125 #define EMAC_MAC_CTL1_VC (0x1 << 6)
126 /* 0: Disable(default) 1: Enable MAC auto detect Short frames */
127 #define EMAC_MAC_CTL1_ADP (0x1 << 7)
128 /* 0: Disable(default) 1: Enable */
129 #define EMAC_MAC_CTL1_PRE (0x1 << 8)
130 /* 0: Disable(default) 1: Enable */
131 #define EMAC_MAC_CTL1_LPE (0x1 << 9)
132 /* 0: Disable(default) 1: Enable no back off */
133 #define EMAC_MAC_CTL1_NB (0x1 << 12)
134 /* 0: Disable(default) 1: Enable */
135 #define EMAC_MAC_CTL1_BNB (0x1 << 13)
136 /* 0: Disable(default) 1: Enable */
137 #define EMAC_MAC_CTL1_ED (0x1 << 14)
139 #define EMAC_MAC_CTL1_SETUP (EMAC_MAC_CTL1_FLC | EMAC_MAC_CTL1_CRC | \
142 #define EMAC_MAC_IPGT 0x15
144 #define EMAC_MAC_NBTB_IPG1 0xc
145 #define EMAC_MAC_NBTB_IPG2 0x12
147 #define EMAC_MAC_CW 0x37
148 #define EMAC_MAC_RM 0xf
150 #define EMAC_MAC_MFL 0x0600
153 #define EMAC_CRCERR (0x1 << 4)
154 #define EMAC_LENERR (0x3 << 5)
156 #define EMAC_RX_BUFSIZE 2000
158 struct emac_eth_dev {
159 struct emac_regs *regs;
161 struct phy_device *phydev;
164 uchar rx_buf[EMAC_RX_BUFSIZE];
173 static void emac_inblk_32bit(void *reg, void *data, int count)
175 int cnt = (count + 3) >> 2;
187 static void emac_outblk_32bit(void *reg, void *data, int count)
189 int cnt = (count + 3) >> 2;
192 const u32 *buf = data;
200 /* Read a word from phyxcer */
201 static int emac_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
203 struct emac_eth_dev *priv = bus->priv;
204 struct emac_regs *regs = priv->regs;
206 /* issue the phy address and reg */
207 writel(addr << 8 | reg, ®s->mac_madr);
209 /* pull up the phy io line */
210 writel(0x1, ®s->mac_mcmd);
212 /* Wait read complete */
215 /* push down the phy io line */
216 writel(0x0, ®s->mac_mcmd);
219 return readl(®s->mac_mrdd);
222 /* Write a word to phyxcer */
223 static int emac_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
226 struct emac_eth_dev *priv = bus->priv;
227 struct emac_regs *regs = priv->regs;
229 /* issue the phy address and reg */
230 writel(addr << 8 | reg, ®s->mac_madr);
232 /* pull up the phy io line */
233 writel(0x1, ®s->mac_mcmd);
235 /* Wait write complete */
238 /* push down the phy io line */
239 writel(0x0, ®s->mac_mcmd);
242 writel(value, ®s->mac_mwtd);
247 static int sunxi_emac_init_phy(struct emac_eth_dev *priv, void *dev)
249 int ret, mask = 0xffffffff;
251 #ifdef CONFIG_PHY_ADDR
252 mask = 1 << CONFIG_PHY_ADDR;
255 priv->bus = mdio_alloc();
257 printf("Failed to allocate MDIO bus\n");
261 priv->bus->read = emac_mdio_read;
262 priv->bus->write = emac_mdio_write;
263 priv->bus->priv = priv;
264 strcpy(priv->bus->name, "emac");
266 ret = mdio_register(priv->bus);
270 priv->phydev = phy_find_by_mask(priv->bus, mask,
271 PHY_INTERFACE_MODE_MII);
275 phy_connect_dev(priv->phydev, dev);
276 phy_config(priv->phydev);
281 static void emac_setup(struct emac_eth_dev *priv)
283 struct emac_regs *regs = priv->regs;
287 writel(EMAC_TX_SETUP, ®s->tx_mode);
290 writel(EMAC_RX_SETUP, ®s->rx_ctl);
294 writel(EMAC_MAC_CTL0_SETUP, ®s->mac_ctl0);
298 if (priv->phydev->duplex == DUPLEX_FULL)
299 reg_val = (0x1 << 0);
300 writel(EMAC_MAC_CTL1_SETUP | reg_val, ®s->mac_ctl1);
303 writel(EMAC_MAC_IPGT, ®s->mac_ipgt);
306 writel(EMAC_MAC_NBTB_IPG2 | (EMAC_MAC_NBTB_IPG1 << 8), ®s->mac_ipgr);
308 /* Set up Collison window */
309 writel(EMAC_MAC_RM | (EMAC_MAC_CW << 8), ®s->mac_clrt);
311 /* Set up Max Frame Length */
312 writel(EMAC_MAC_MFL, ®s->mac_maxf);
315 static void emac_reset(struct emac_eth_dev *priv)
317 struct emac_regs *regs = priv->regs;
319 debug("resetting device\n");
322 writel(0, ®s->ctl);
325 writel(1, ®s->ctl);
329 static int _sunxi_write_hwaddr(struct emac_eth_dev *priv, u8 *enetaddr)
331 struct emac_regs *regs = priv->regs;
332 u32 enetaddr_lo, enetaddr_hi;
334 enetaddr_lo = enetaddr[2] | (enetaddr[1] << 8) | (enetaddr[0] << 16);
335 enetaddr_hi = enetaddr[5] | (enetaddr[4] << 8) | (enetaddr[3] << 16);
337 writel(enetaddr_hi, ®s->mac_a0);
338 writel(enetaddr_lo, ®s->mac_a1);
343 static int _sunxi_emac_eth_init(struct emac_eth_dev *priv, u8 *enetaddr)
345 struct emac_regs *regs = priv->regs;
351 setbits_le32(®s->rx_ctl, 0x8);
357 clrbits_le32(®s->mac_ctl0, 0x1 << 15);
359 /* Clear RX counter */
360 writel(0x0, ®s->rx_fbc);
366 _sunxi_write_hwaddr(priv, enetaddr);
373 ret = phy_startup(priv->phydev);
375 printf("Could not initialize PHY %s\n",
376 priv->phydev->dev->name);
380 /* Print link status only once */
381 if (!priv->link_printed) {
382 printf("ENET Speed is %d Mbps - %s duplex connection\n",
384 priv->phydev->duplex ? "FULL" : "HALF");
385 priv->link_printed = 1;
388 /* Set EMAC SPEED depend on PHY */
389 if (priv->phydev->speed == SPEED_100)
390 setbits_le32(®s->mac_supp, 1 << 8);
392 clrbits_le32(®s->mac_supp, 1 << 8);
394 /* Set duplex depend on phy */
395 if (priv->phydev->duplex == DUPLEX_FULL)
396 setbits_le32(®s->mac_ctl1, 1 << 0);
398 clrbits_le32(®s->mac_ctl1, 1 << 0);
401 setbits_le32(®s->ctl, 0x7);
406 static int _sunxi_emac_eth_recv(struct emac_eth_dev *priv, void *packet)
408 struct emac_regs *regs = priv->regs;
409 struct emac_rxhdr rxhdr;
416 /* Check packet ready or not */
418 /* Race warning: The first packet might arrive with
419 * the interrupts disabled, but the second will fix
421 rxcount = readl(®s->rx_fbc);
424 rxcount = readl(®s->rx_fbc);
429 reg_val = readl(®s->rx_io_data);
430 if (reg_val != 0x0143414d) {
432 clrbits_le32(®s->ctl, 0x1 << 2);
435 setbits_le32(®s->rx_ctl, 0x1 << 3);
436 while (readl(®s->rx_ctl) & (0x1 << 3))
440 setbits_le32(®s->ctl, 0x1 << 2);
445 /* A packet ready now
450 emac_inblk_32bit(®s->rx_io_data, &rxhdr, sizeof(rxhdr));
452 rx_len = rxhdr.rx_len;
453 rx_status = rxhdr.rx_status;
455 /* Packet Status check */
458 debug("RX: Bad Packet (runt)\n");
461 /* rx_status is identical to RSR register. */
462 if (0 & rx_status & (EMAC_CRCERR | EMAC_LENERR)) {
464 if (rx_status & EMAC_CRCERR)
465 printf("crc error\n");
466 if (rx_status & EMAC_LENERR)
467 printf("length error\n");
470 /* Move data from EMAC */
472 if (rx_len > EMAC_RX_BUFSIZE) {
473 printf("Received packet is too big (len=%d)\n", rx_len);
476 emac_inblk_32bit((void *)®s->rx_io_data, packet, rx_len);
480 return -EIO; /* Bad packet */
483 static int _sunxi_emac_eth_send(struct emac_eth_dev *priv, void *packet,
486 struct emac_regs *regs = priv->regs;
488 /* Select channel 0 */
489 writel(0, ®s->tx_ins);
492 emac_outblk_32bit((void *)®s->tx_io_data, packet, len);
495 writel(len, ®s->tx_pl0);
497 /* Start translate from fifo to phy */
498 setbits_le32(®s->tx_ctl0, 1);
503 static void sunxi_emac_board_setup(struct emac_eth_dev *priv)
505 struct sunxi_ccm_reg *const ccm =
506 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
507 struct sunxi_sramc_regs *sram =
508 (struct sunxi_sramc_regs *)SUNXI_SRAMC_BASE;
509 struct emac_regs *regs = priv->regs;
512 /* Map SRAM to EMAC */
513 setbits_le32(&sram->ctrl1, 0x5 << 2);
515 /* Configure pin mux settings for MII Ethernet */
516 for (pin = SUNXI_GPA(0); pin <= SUNXI_GPA(17); pin++)
517 sunxi_gpio_set_cfgpin(pin, SUNXI_GPA_EMAC);
519 /* Set up clock gating */
520 setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_EMAC);
523 clrsetbits_le32(®s->mac_mcfg, 0xf << 2, 0xd << 2);
526 static int sunxi_emac_eth_start(struct udevice *dev)
528 struct eth_pdata *pdata = dev_get_platdata(dev);
530 return _sunxi_emac_eth_init(dev->priv, pdata->enetaddr);
533 static int sunxi_emac_eth_send(struct udevice *dev, void *packet, int length)
535 struct emac_eth_dev *priv = dev_get_priv(dev);
537 return _sunxi_emac_eth_send(priv, packet, length);
540 static int sunxi_emac_eth_recv(struct udevice *dev, int flags, uchar **packetp)
542 struct emac_eth_dev *priv = dev_get_priv(dev);
545 rx_len = _sunxi_emac_eth_recv(priv, priv->rx_buf);
546 *packetp = priv->rx_buf;
551 static void sunxi_emac_eth_stop(struct udevice *dev)
553 /* Nothing to do here */
556 static int sunxi_emac_eth_probe(struct udevice *dev)
558 struct eth_pdata *pdata = dev_get_platdata(dev);
559 struct emac_eth_dev *priv = dev_get_priv(dev);
561 priv->regs = (struct emac_regs *)pdata->iobase;
562 sunxi_emac_board_setup(priv);
564 return sunxi_emac_init_phy(priv, dev);
567 static const struct eth_ops sunxi_emac_eth_ops = {
568 .start = sunxi_emac_eth_start,
569 .send = sunxi_emac_eth_send,
570 .recv = sunxi_emac_eth_recv,
571 .stop = sunxi_emac_eth_stop,
574 static int sunxi_emac_eth_ofdata_to_platdata(struct udevice *dev)
576 struct eth_pdata *pdata = dev_get_platdata(dev);
578 pdata->iobase = devfdt_get_addr(dev);
583 static const struct udevice_id sunxi_emac_eth_ids[] = {
584 { .compatible = "allwinner,sun4i-a10-emac" },
588 U_BOOT_DRIVER(eth_sunxi_emac) = {
589 .name = "eth_sunxi_emac",
591 .of_match = sunxi_emac_eth_ids,
592 .ofdata_to_platdata = sunxi_emac_eth_ofdata_to_platdata,
593 .probe = sunxi_emac_eth_probe,
594 .ops = &sunxi_emac_eth_ops,
595 .priv_auto_alloc_size = sizeof(struct emac_eth_dev),
596 .platdata_auto_alloc_size = sizeof(struct eth_pdata),