2 * sunxi_emac.c -- Allwinner A10 ethernet driver
4 * (C) Copyright 2012, Stefan Roese <sr@denx.de>
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <linux/err.h>
16 #include <asm/arch/clock.h>
17 #include <asm/arch/gpio.h>
22 u32 tx_mode; /* 0x04 */
23 u32 tx_flow; /* 0x08 */
24 u32 tx_ctl0; /* 0x0c */
25 u32 tx_ctl1; /* 0x10 */
26 u32 tx_ins; /* 0x14 */
27 u32 tx_pl0; /* 0x18 */
28 u32 tx_pl1; /* 0x1c */
29 u32 tx_sta; /* 0x20 */
30 u32 tx_io_data; /* 0x24 */
31 u32 tx_io_data1;/* 0x28 */
32 u32 tx_tsvl0; /* 0x2c */
33 u32 tx_tsvh0; /* 0x30 */
34 u32 tx_tsvl1; /* 0x34 */
35 u32 tx_tsvh1; /* 0x38 */
36 u32 rx_ctl; /* 0x3c */
37 u32 rx_hash0; /* 0x40 */
38 u32 rx_hash1; /* 0x44 */
39 u32 rx_sta; /* 0x48 */
40 u32 rx_io_data; /* 0x4c */
41 u32 rx_fbc; /* 0x50 */
42 u32 int_ctl; /* 0x54 */
43 u32 int_sta; /* 0x58 */
44 u32 mac_ctl0; /* 0x5c */
45 u32 mac_ctl1; /* 0x60 */
46 u32 mac_ipgt; /* 0x64 */
47 u32 mac_ipgr; /* 0x68 */
48 u32 mac_clrt; /* 0x6c */
49 u32 mac_maxf; /* 0x70 */
50 u32 mac_supp; /* 0x74 */
51 u32 mac_test; /* 0x78 */
52 u32 mac_mcfg; /* 0x7c */
53 u32 mac_mcmd; /* 0x80 */
54 u32 mac_madr; /* 0x84 */
55 u32 mac_mwtd; /* 0x88 */
56 u32 mac_mrdd; /* 0x8c */
57 u32 mac_mind; /* 0x90 */
58 u32 mac_ssrr; /* 0x94 */
59 u32 mac_a0; /* 0x98 */
60 u32 mac_a1; /* 0x9c */
64 struct sunxi_sramc_regs {
69 /* 0: Disable 1: Aborted frame enable(default) */
70 #define EMAC_TX_AB_M (0x1 << 0)
71 /* 0: CPU 1: DMA(default) */
72 #define EMAC_TX_TM (0x1 << 1)
74 #define EMAC_TX_SETUP (0)
76 /* 0: DRQ asserted 1: DRQ automatically(default) */
77 #define EMAC_RX_DRQ_MODE (0x1 << 1)
78 /* 0: CPU 1: DMA(default) */
79 #define EMAC_RX_TM (0x1 << 2)
80 /* 0: Normal(default) 1: Pass all Frames */
81 #define EMAC_RX_PA (0x1 << 4)
82 /* 0: Normal(default) 1: Pass Control Frames */
83 #define EMAC_RX_PCF (0x1 << 5)
84 /* 0: Normal(default) 1: Pass Frames with CRC Error */
85 #define EMAC_RX_PCRCE (0x1 << 6)
86 /* 0: Normal(default) 1: Pass Frames with Length Error */
87 #define EMAC_RX_PLE (0x1 << 7)
88 /* 0: Normal 1: Pass Frames length out of range(default) */
89 #define EMAC_RX_POR (0x1 << 8)
90 /* 0: Not accept 1: Accept unicast Packets(default) */
91 #define EMAC_RX_UCAD (0x1 << 16)
92 /* 0: Normal(default) 1: DA Filtering */
93 #define EMAC_RX_DAF (0x1 << 17)
94 /* 0: Not accept 1: Accept multicast Packets(default) */
95 #define EMAC_RX_MCO (0x1 << 20)
96 /* 0: Disable(default) 1: Enable Hash filter */
97 #define EMAC_RX_MHF (0x1 << 21)
98 /* 0: Not accept 1: Accept Broadcast Packets(default) */
99 #define EMAC_RX_BCO (0x1 << 22)
100 /* 0: Disable(default) 1: Enable SA Filtering */
101 #define EMAC_RX_SAF (0x1 << 24)
102 /* 0: Normal(default) 1: Inverse Filtering */
103 #define EMAC_RX_SAIF (0x1 << 25)
105 #define EMAC_RX_SETUP (EMAC_RX_POR | EMAC_RX_UCAD | EMAC_RX_DAF | \
106 EMAC_RX_MCO | EMAC_RX_BCO)
108 /* 0: Disable 1: Enable Receive Flow Control(default) */
109 #define EMAC_MAC_CTL0_RFC (0x1 << 2)
110 /* 0: Disable 1: Enable Transmit Flow Control(default) */
111 #define EMAC_MAC_CTL0_TFC (0x1 << 3)
113 #define EMAC_MAC_CTL0_SETUP (EMAC_MAC_CTL0_RFC | EMAC_MAC_CTL0_TFC)
115 /* 0: Disable 1: Enable MAC Frame Length Checking(default) */
116 #define EMAC_MAC_CTL1_FLC (0x1 << 1)
117 /* 0: Disable(default) 1: Enable Huge Frame */
118 #define EMAC_MAC_CTL1_HF (0x1 << 2)
119 /* 0: Disable(default) 1: Enable MAC Delayed CRC */
120 #define EMAC_MAC_CTL1_DCRC (0x1 << 3)
121 /* 0: Disable 1: Enable MAC CRC(default) */
122 #define EMAC_MAC_CTL1_CRC (0x1 << 4)
123 /* 0: Disable 1: Enable MAC PAD Short frames(default) */
124 #define EMAC_MAC_CTL1_PC (0x1 << 5)
125 /* 0: Disable(default) 1: Enable MAC PAD Short frames and append CRC */
126 #define EMAC_MAC_CTL1_VC (0x1 << 6)
127 /* 0: Disable(default) 1: Enable MAC auto detect Short frames */
128 #define EMAC_MAC_CTL1_ADP (0x1 << 7)
129 /* 0: Disable(default) 1: Enable */
130 #define EMAC_MAC_CTL1_PRE (0x1 << 8)
131 /* 0: Disable(default) 1: Enable */
132 #define EMAC_MAC_CTL1_LPE (0x1 << 9)
133 /* 0: Disable(default) 1: Enable no back off */
134 #define EMAC_MAC_CTL1_NB (0x1 << 12)
135 /* 0: Disable(default) 1: Enable */
136 #define EMAC_MAC_CTL1_BNB (0x1 << 13)
137 /* 0: Disable(default) 1: Enable */
138 #define EMAC_MAC_CTL1_ED (0x1 << 14)
140 #define EMAC_MAC_CTL1_SETUP (EMAC_MAC_CTL1_FLC | EMAC_MAC_CTL1_CRC | \
143 #define EMAC_MAC_IPGT 0x15
145 #define EMAC_MAC_NBTB_IPG1 0xc
146 #define EMAC_MAC_NBTB_IPG2 0x12
148 #define EMAC_MAC_CW 0x37
149 #define EMAC_MAC_RM 0xf
151 #define EMAC_MAC_MFL 0x0600
154 #define EMAC_CRCERR (0x1 << 4)
155 #define EMAC_LENERR (0x3 << 5)
157 #define EMAC_RX_BUFSIZE 2000
159 struct emac_eth_dev {
160 struct emac_regs *regs;
162 struct phy_device *phydev;
165 uchar rx_buf[EMAC_RX_BUFSIZE];
174 static void emac_inblk_32bit(void *reg, void *data, int count)
176 int cnt = (count + 3) >> 2;
188 static void emac_outblk_32bit(void *reg, void *data, int count)
190 int cnt = (count + 3) >> 2;
193 const u32 *buf = data;
201 /* Read a word from phyxcer */
202 static int emac_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
204 struct emac_eth_dev *priv = bus->priv;
205 struct emac_regs *regs = priv->regs;
207 /* issue the phy address and reg */
208 writel(addr << 8 | reg, ®s->mac_madr);
210 /* pull up the phy io line */
211 writel(0x1, ®s->mac_mcmd);
213 /* Wait read complete */
216 /* push down the phy io line */
217 writel(0x0, ®s->mac_mcmd);
220 return readl(®s->mac_mrdd);
223 /* Write a word to phyxcer */
224 static int emac_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
227 struct emac_eth_dev *priv = bus->priv;
228 struct emac_regs *regs = priv->regs;
230 /* issue the phy address and reg */
231 writel(addr << 8 | reg, ®s->mac_madr);
233 /* pull up the phy io line */
234 writel(0x1, ®s->mac_mcmd);
236 /* Wait write complete */
239 /* push down the phy io line */
240 writel(0x0, ®s->mac_mcmd);
243 writel(value, ®s->mac_mwtd);
248 static int sunxi_emac_init_phy(struct emac_eth_dev *priv, void *dev)
250 int ret, mask = 0xffffffff;
252 #ifdef CONFIG_PHY_ADDR
253 mask = 1 << CONFIG_PHY_ADDR;
256 priv->bus = mdio_alloc();
258 printf("Failed to allocate MDIO bus\n");
262 priv->bus->read = emac_mdio_read;
263 priv->bus->write = emac_mdio_write;
264 priv->bus->priv = priv;
265 strcpy(priv->bus->name, "emac");
267 ret = mdio_register(priv->bus);
271 priv->phydev = phy_find_by_mask(priv->bus, mask,
272 PHY_INTERFACE_MODE_MII);
276 phy_connect_dev(priv->phydev, dev);
277 phy_config(priv->phydev);
282 static void emac_setup(struct emac_eth_dev *priv)
284 struct emac_regs *regs = priv->regs;
288 writel(EMAC_TX_SETUP, ®s->tx_mode);
291 writel(EMAC_RX_SETUP, ®s->rx_ctl);
295 writel(EMAC_MAC_CTL0_SETUP, ®s->mac_ctl0);
299 if (priv->phydev->duplex == DUPLEX_FULL)
300 reg_val = (0x1 << 0);
301 writel(EMAC_MAC_CTL1_SETUP | reg_val, ®s->mac_ctl1);
304 writel(EMAC_MAC_IPGT, ®s->mac_ipgt);
307 writel(EMAC_MAC_NBTB_IPG2 | (EMAC_MAC_NBTB_IPG1 << 8), ®s->mac_ipgr);
309 /* Set up Collison window */
310 writel(EMAC_MAC_RM | (EMAC_MAC_CW << 8), ®s->mac_clrt);
312 /* Set up Max Frame Length */
313 writel(EMAC_MAC_MFL, ®s->mac_maxf);
316 static void emac_reset(struct emac_eth_dev *priv)
318 struct emac_regs *regs = priv->regs;
320 debug("resetting device\n");
323 writel(0, ®s->ctl);
326 writel(1, ®s->ctl);
330 static int _sunxi_write_hwaddr(struct emac_eth_dev *priv, u8 *enetaddr)
332 struct emac_regs *regs = priv->regs;
333 u32 enetaddr_lo, enetaddr_hi;
335 enetaddr_lo = enetaddr[2] | (enetaddr[1] << 8) | (enetaddr[0] << 16);
336 enetaddr_hi = enetaddr[5] | (enetaddr[4] << 8) | (enetaddr[3] << 16);
338 writel(enetaddr_hi, ®s->mac_a1);
339 writel(enetaddr_lo, ®s->mac_a0);
344 static int _sunxi_emac_eth_init(struct emac_eth_dev *priv, u8 *enetaddr)
346 struct emac_regs *regs = priv->regs;
352 setbits_le32(®s->rx_ctl, 0x8);
358 clrbits_le32(®s->mac_ctl0, 0x1 << 15);
360 /* Clear RX counter */
361 writel(0x0, ®s->rx_fbc);
367 _sunxi_write_hwaddr(priv, enetaddr);
374 ret = phy_startup(priv->phydev);
376 printf("Could not initialize PHY %s\n",
377 priv->phydev->dev->name);
381 /* Print link status only once */
382 if (!priv->link_printed) {
383 printf("ENET Speed is %d Mbps - %s duplex connection\n",
385 priv->phydev->duplex ? "FULL" : "HALF");
386 priv->link_printed = 1;
389 /* Set EMAC SPEED depend on PHY */
390 if (priv->phydev->speed == SPEED_100)
391 setbits_le32(®s->mac_supp, 1 << 8);
393 clrbits_le32(®s->mac_supp, 1 << 8);
395 /* Set duplex depend on phy */
396 if (priv->phydev->duplex == DUPLEX_FULL)
397 setbits_le32(®s->mac_ctl1, 1 << 0);
399 clrbits_le32(®s->mac_ctl1, 1 << 0);
402 setbits_le32(®s->ctl, 0x7);
407 static int _sunxi_emac_eth_recv(struct emac_eth_dev *priv, void *packet)
409 struct emac_regs *regs = priv->regs;
410 struct emac_rxhdr rxhdr;
417 /* Check packet ready or not */
419 /* Race warning: The first packet might arrive with
420 * the interrupts disabled, but the second will fix
422 rxcount = readl(®s->rx_fbc);
425 rxcount = readl(®s->rx_fbc);
430 reg_val = readl(®s->rx_io_data);
431 if (reg_val != 0x0143414d) {
433 clrbits_le32(®s->ctl, 0x1 << 2);
436 setbits_le32(®s->rx_ctl, 0x1 << 3);
437 while (readl(®s->rx_ctl) & (0x1 << 3))
441 setbits_le32(®s->ctl, 0x1 << 2);
446 /* A packet ready now
451 emac_inblk_32bit(®s->rx_io_data, &rxhdr, sizeof(rxhdr));
453 rx_len = rxhdr.rx_len;
454 rx_status = rxhdr.rx_status;
456 /* Packet Status check */
459 debug("RX: Bad Packet (runt)\n");
462 /* rx_status is identical to RSR register. */
463 if (0 & rx_status & (EMAC_CRCERR | EMAC_LENERR)) {
465 if (rx_status & EMAC_CRCERR)
466 printf("crc error\n");
467 if (rx_status & EMAC_LENERR)
468 printf("length error\n");
471 /* Move data from EMAC */
473 if (rx_len > EMAC_RX_BUFSIZE) {
474 printf("Received packet is too big (len=%d)\n", rx_len);
477 emac_inblk_32bit((void *)®s->rx_io_data, packet, rx_len);
481 return -EIO; /* Bad packet */
484 static int _sunxi_emac_eth_send(struct emac_eth_dev *priv, void *packet,
487 struct emac_regs *regs = priv->regs;
489 /* Select channel 0 */
490 writel(0, ®s->tx_ins);
493 emac_outblk_32bit((void *)®s->tx_io_data, packet, len);
496 writel(len, ®s->tx_pl0);
498 /* Start translate from fifo to phy */
499 setbits_le32(®s->tx_ctl0, 1);
504 static void sunxi_emac_board_setup(struct emac_eth_dev *priv)
506 struct sunxi_ccm_reg *const ccm =
507 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
508 struct sunxi_sramc_regs *sram =
509 (struct sunxi_sramc_regs *)SUNXI_SRAMC_BASE;
510 struct emac_regs *regs = priv->regs;
513 /* Map SRAM to EMAC */
514 setbits_le32(&sram->ctrl1, 0x5 << 2);
516 /* Configure pin mux settings for MII Ethernet */
517 for (pin = SUNXI_GPA(0); pin <= SUNXI_GPA(17); pin++)
518 sunxi_gpio_set_cfgpin(pin, SUNXI_GPA_EMAC);
520 /* Set up clock gating */
521 setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_EMAC);
524 clrsetbits_le32(®s->mac_mcfg, 0xf << 2, 0xd << 2);
527 static int sunxi_emac_eth_start(struct udevice *dev)
529 struct eth_pdata *pdata = dev_get_platdata(dev);
531 return _sunxi_emac_eth_init(dev->priv, pdata->enetaddr);
534 static int sunxi_emac_eth_send(struct udevice *dev, void *packet, int length)
536 struct emac_eth_dev *priv = dev_get_priv(dev);
538 return _sunxi_emac_eth_send(priv, packet, length);
541 static int sunxi_emac_eth_recv(struct udevice *dev, int flags, uchar **packetp)
543 struct emac_eth_dev *priv = dev_get_priv(dev);
546 rx_len = _sunxi_emac_eth_recv(priv, priv->rx_buf);
547 *packetp = priv->rx_buf;
552 static void sunxi_emac_eth_stop(struct udevice *dev)
554 /* Nothing to do here */
557 static int sunxi_emac_eth_probe(struct udevice *dev)
559 struct eth_pdata *pdata = dev_get_platdata(dev);
560 struct emac_eth_dev *priv = dev_get_priv(dev);
562 priv->regs = (struct emac_regs *)pdata->iobase;
563 sunxi_emac_board_setup(priv);
565 return sunxi_emac_init_phy(priv, dev);
568 static const struct eth_ops sunxi_emac_eth_ops = {
569 .start = sunxi_emac_eth_start,
570 .send = sunxi_emac_eth_send,
571 .recv = sunxi_emac_eth_recv,
572 .stop = sunxi_emac_eth_stop,
575 static int sunxi_emac_eth_ofdata_to_platdata(struct udevice *dev)
577 struct eth_pdata *pdata = dev_get_platdata(dev);
579 pdata->iobase = dev_get_addr(dev);
584 static const struct udevice_id sunxi_emac_eth_ids[] = {
585 { .compatible = "allwinner,sun4i-a10-emac" },
589 U_BOOT_DRIVER(eth_sunxi_emac) = {
590 .name = "eth_sunxi_emac",
592 .of_match = sunxi_emac_eth_ids,
593 .ofdata_to_platdata = sunxi_emac_eth_ofdata_to_platdata,
594 .probe = sunxi_emac_eth_probe,
595 .ops = &sunxi_emac_eth_ops,
596 .priv_auto_alloc_size = sizeof(struct emac_eth_dev),
597 .platdata_auto_alloc_size = sizeof(struct eth_pdata),