2 * sunxi_wemac.c -- Allwinner A10 ethernet driver
4 * (C) Copyright 2012, Stefan Roese <sr@denx.de>
6 * SPDX-License-Identifier: GPL-2.0+
13 #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 (1 << 4)
154 #define EMAC_LENERR (3 << 5)
156 #define DMA_CPU_TRRESHOLD 2000
158 struct wemac_eth_dev {
170 static void wemac_inblk_32bit(void *reg, void *data, int count)
172 int cnt = (count + 3) >> 2;
184 static void wemac_outblk_32bit(void *reg, void *data, int count)
186 int cnt = (count + 3) >> 2;
189 const u32 *buf = data;
198 * Read a word from phyxcer
200 static int wemac_phy_read(const char *devname, unsigned char addr,
201 unsigned char reg, unsigned short *value)
203 struct eth_device *dev = eth_get_dev_by_name(devname);
204 struct wemac_regs *regs = (struct wemac_regs *)dev->iobase;
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 *value = readl(®s->mac_mrdd);
225 * Write a word to phyxcer
227 static int wemac_phy_write(const char *devname, unsigned char addr,
228 unsigned char reg, unsigned short value)
230 struct eth_device *dev = eth_get_dev_by_name(devname);
231 struct wemac_regs *regs = (struct wemac_regs *)dev->iobase;
233 /* issue the phy address and reg */
234 writel(addr << 8 | reg, ®s->mac_madr);
236 /* pull up the phy io line */
237 writel(0x1, ®s->mac_mcmd);
239 /* Wait write complete */
242 /* push down the phy io line */
243 writel(0x0, ®s->mac_mcmd);
246 writel(value, ®s->mac_mwtd);
251 static void emac_setup(struct eth_device *dev)
253 struct wemac_regs *regs = (struct wemac_regs *)dev->iobase;
259 writel(EMAC_TX_SETUP, ®s->tx_mode);
262 writel(EMAC_RX_SETUP, ®s->rx_ctl);
266 writel(EMAC_MAC_CTL0_SETUP, ®s->mac_ctl0);
269 wemac_phy_read(dev->name, 1, 0, &phy_val);
270 debug("PHY SETUP, reg 0 value: %x\n", phy_val);
271 duplex_flag = !!(phy_val & (1 << 8));
275 reg_val = (0x1 << 0);
276 writel(EMAC_MAC_CTL1_SETUP | reg_val, ®s->mac_ctl1);
279 writel(EMAC_MAC_IPGT, ®s->mac_ipgt);
282 writel(EMAC_MAC_NBTB_IPG2 | (EMAC_MAC_NBTB_IPG1 << 8), ®s->mac_ipgr);
284 /* Set up Collison window */
285 writel(EMAC_MAC_RM | (EMAC_MAC_CW << 8), ®s->mac_clrt);
287 /* Set up Max Frame Length */
288 writel(EMAC_MAC_MFL, ®s->mac_maxf);
291 static void wemac_reset(struct eth_device *dev)
293 struct wemac_regs *regs = (struct wemac_regs *)dev->iobase;
295 debug("resetting device\n");
298 writel(0, ®s->ctl);
301 writel(1, ®s->ctl);
305 static int sunxi_wemac_eth_init(struct eth_device *dev, bd_t *bd)
307 struct wemac_regs *regs = (struct wemac_regs *)dev->iobase;
308 struct wemac_eth_dev *priv = dev->priv;
314 setbits_le32(®s->rx_ctl, 0x8);
320 clrbits_le32(®s->mac_ctl0, 1 << 15);
323 clrsetbits_le32(®s->mac_mcfg, 0xf << 2, 0xd << 2);
325 /* Clear RX counter */
326 writel(0x0, ®s->rx_fbc);
332 writel(dev->enetaddr[0] << 16 | dev->enetaddr[1] << 8 |
333 dev->enetaddr[2], ®s->mac_a1);
334 writel(dev->enetaddr[3] << 16 | dev->enetaddr[4] << 8 |
335 dev->enetaddr[5], ®s->mac_a0);
342 wemac_phy_read(dev->name, 1, 0, &phy_reg);
343 wemac_phy_write(dev->name, 1, 0, phy_reg & (~(1 << 11)));
346 wemac_phy_read(dev->name, 1, 0, &phy_reg);
348 priv->speed = miiphy_speed(dev->name, 0);
349 priv->duplex = miiphy_duplex(dev->name, 0);
351 /* Print link status only once */
352 if (!priv->link_printed) {
353 printf("ENET Speed is %d Mbps - %s duplex connection\n",
354 priv->speed, (priv->duplex == HALF) ? "HALF" : "FULL");
355 priv->link_printed = 1;
358 /* Set EMAC SPEED depend on PHY */
359 clrsetbits_le32(®s->mac_supp, 1 << 8,
360 ((phy_reg & (1 << 13)) >> 13) << 8);
362 /* Set duplex depend on phy */
363 clrsetbits_le32(®s->mac_ctl1, 1 << 0,
364 ((phy_reg & (1 << 8)) >> 8) << 0);
367 setbits_le32(®s->ctl, 0x7);
372 static void sunxi_wemac_eth_halt(struct eth_device *dev)
374 /* Nothing to do here */
377 static int sunxi_wemac_eth_recv(struct eth_device *dev)
379 struct wemac_regs *regs = (struct wemac_regs *)dev->iobase;
380 struct wemac_rxhdr rxhdr;
387 /* Check packet ready or not */
390 * Race warning: The first packet might arrive with
391 * the interrupts disabled, but the second will fix
393 rxcount = readl(®s->rx_fbc);
396 rxcount = readl(®s->rx_fbc);
401 reg_val = readl(®s->rx_io_data);
402 if (reg_val != 0x0143414d) {
404 clrbits_le32(®s->ctl, 1 << 2);
407 setbits_le32(®s->rx_ctl, 1 << 3);
408 while (readl(®s->rx_ctl) & (1 << 3))
412 setbits_le32(®s->ctl, 1 << 2);
423 wemac_inblk_32bit(®s->rx_io_data, &rxhdr, sizeof(rxhdr));
425 rx_len = rxhdr.rx_len;
426 rx_status = rxhdr.rx_status;
428 /* Packet Status check */
431 debug("RX: Bad Packet (runt)\n");
434 /* rx_status is identical to RSR register. */
435 if (0 & rx_status & (EMAC_CRCERR | EMAC_LENERR)) {
437 if (rx_status & EMAC_CRCERR)
438 printf("crc error\n");
439 if (rx_status & EMAC_LENERR)
440 printf("length error\n");
443 /* Move data from WEMAC */
445 if (rx_len > DMA_CPU_TRRESHOLD) {
446 printf("Received packet is too big (len=%d)\n", rx_len);
448 wemac_inblk_32bit((void *)®s->rx_io_data,
449 NetRxPackets[0], rx_len);
451 /* Pass to upper layer */
452 NetReceive(NetRxPackets[0], rx_len);
460 static int sunxi_wemac_eth_send(struct eth_device *dev, void *packet, int len)
462 struct wemac_regs *regs = (struct wemac_regs *)dev->iobase;
464 /* Select channel 0 */
465 writel(0, ®s->tx_ins);
468 wemac_outblk_32bit((void *)®s->tx_io_data, packet, len);
471 writel(len, ®s->tx_pl0);
473 /* Start translate from fifo to phy */
474 setbits_le32(®s->tx_ctl0, 1);
479 int sunxi_wemac_initialize(void)
481 struct sunxi_ccm_reg *const ccm =
482 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
483 struct sunxi_sramc_regs *sram =
484 (struct sunxi_sramc_regs *)SUNXI_SRAMC_BASE;
485 struct eth_device *dev;
486 struct wemac_eth_dev *priv;
489 dev = malloc(sizeof(*dev));
493 priv = (struct wemac_eth_dev *)malloc(sizeof(struct wemac_eth_dev));
499 memset(dev, 0, sizeof(*dev));
500 memset(priv, 0, sizeof(struct wemac_eth_dev));
502 /* Map SRAM to EMAC */
503 setbits_le32(&sram->ctrl1, 0x5 << 2);
505 /* Configure pin mux settings for MII Ethernet */
506 for (pin = SUNXI_GPA(0); pin <= SUNXI_GPA(17); pin++)
507 sunxi_gpio_set_cfgpin(pin, 2);
509 /* Set up clock gating */
510 setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_EMAC);
512 dev->iobase = SUNXI_EMAC_BASE;
514 dev->init = sunxi_wemac_eth_init;
515 dev->halt = sunxi_wemac_eth_halt;
516 dev->send = sunxi_wemac_eth_send;
517 dev->recv = sunxi_wemac_eth_recv;
518 strcpy(dev->name, "wemac");
522 miiphy_register(dev->name, wemac_phy_read, wemac_phy_write);