2 * (C) Copyright 2011 Michal Simek
4 * Michal SIMEK <monstr@monstr.eu>
6 * Based on Xilinx gmac driver:
7 * (C) Copyright 2011 Xilinx
9 * SPDX-License-Identifier: GPL-2.0+
20 #include <asm/arch/hardware.h>
21 #include <asm/arch/sys_proto.h>
23 #if !defined(CONFIG_PHYLIB)
24 # error XILINX_GEM_ETHERNET requires PHYLIB
27 /* Bit/mask specification */
28 #define ZYNQ_GEM_PHYMNTNC_OP_MASK 0x40020000 /* operation mask bits */
29 #define ZYNQ_GEM_PHYMNTNC_OP_R_MASK 0x20000000 /* read operation */
30 #define ZYNQ_GEM_PHYMNTNC_OP_W_MASK 0x10000000 /* write operation */
31 #define ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK 23 /* Shift bits for PHYAD */
32 #define ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK 18 /* Shift bits for PHREG */
34 #define ZYNQ_GEM_RXBUF_EOF_MASK 0x00008000 /* End of frame. */
35 #define ZYNQ_GEM_RXBUF_SOF_MASK 0x00004000 /* Start of frame. */
36 #define ZYNQ_GEM_RXBUF_LEN_MASK 0x00003FFF /* Mask for length field */
38 #define ZYNQ_GEM_RXBUF_WRAP_MASK 0x00000002 /* Wrap bit, last BD */
39 #define ZYNQ_GEM_RXBUF_NEW_MASK 0x00000001 /* Used bit.. */
40 #define ZYNQ_GEM_RXBUF_ADD_MASK 0xFFFFFFFC /* Mask for address */
42 /* Wrap bit, last descriptor */
43 #define ZYNQ_GEM_TXBUF_WRAP_MASK 0x40000000
44 #define ZYNQ_GEM_TXBUF_LAST_MASK 0x00008000 /* Last buffer */
46 #define ZYNQ_GEM_TXSR_HRESPNOK_MASK 0x00000100 /* Transmit hresp not OK */
47 #define ZYNQ_GEM_TXSR_URUN_MASK 0x00000040 /* Transmit underrun */
48 /* Transmit buffs exhausted mid frame */
49 #define ZYNQ_GEM_TXSR_BUFEXH_MASK 0x00000010
51 #define ZYNQ_GEM_NWCTRL_TXEN_MASK 0x00000008 /* Enable transmit */
52 #define ZYNQ_GEM_NWCTRL_RXEN_MASK 0x00000004 /* Enable receive */
53 #define ZYNQ_GEM_NWCTRL_MDEN_MASK 0x00000010 /* Enable MDIO port */
54 #define ZYNQ_GEM_NWCTRL_STARTTX_MASK 0x00000200 /* Start tx (tx_go) */
56 #define ZYNQ_GEM_NWCFG_SPEED100 0x000000001 /* 100 Mbps operation */
57 #define ZYNQ_GEM_NWCFG_SPEED1000 0x000000400 /* 1Gbps operation */
58 #define ZYNQ_GEM_NWCFG_FDEN 0x000000002 /* Full Duplex mode */
59 #define ZYNQ_GEM_NWCFG_FSREM 0x000020000 /* FCS removal */
60 #define ZYNQ_GEM_NWCFG_MDCCLKDIV 0x000080000 /* Div pclk by 32, 80MHz */
61 #define ZYNQ_GEM_NWCFG_MDCCLKDIV2 0x0000c0000 /* Div pclk by 48, 120MHz */
63 #define ZYNQ_GEM_NWCFG_INIT (ZYNQ_GEM_NWCFG_FDEN | \
64 ZYNQ_GEM_NWCFG_FSREM | \
65 ZYNQ_GEM_NWCFG_MDCCLKDIV)
67 #define ZYNQ_GEM_NWSR_MDIOIDLE_MASK 0x00000004 /* PHY management idle */
69 #define ZYNQ_GEM_DMACR_BLENGTH 0x00000004 /* INCR4 AHB bursts */
70 /* Use full configured addressable space (8 Kb) */
71 #define ZYNQ_GEM_DMACR_RXSIZE 0x00000300
72 /* Use full configured addressable space (4 Kb) */
73 #define ZYNQ_GEM_DMACR_TXSIZE 0x00000400
74 /* Set with binary 00011000 to use 1536 byte(1*max length frame/buffer) */
75 #define ZYNQ_GEM_DMACR_RXBUF 0x00180000
77 #define ZYNQ_GEM_DMACR_INIT (ZYNQ_GEM_DMACR_BLENGTH | \
78 ZYNQ_GEM_DMACR_RXSIZE | \
79 ZYNQ_GEM_DMACR_TXSIZE | \
82 /* Use MII register 1 (MII status register) to detect PHY */
83 #define PHY_DETECT_REG 1
85 /* Mask used to verify certain PHY features (or register contents)
86 * in the register above:
87 * 0x1000: 10Mbps full duplex support
88 * 0x0800: 10Mbps half duplex support
89 * 0x0008: Auto-negotiation support
91 #define PHY_DETECT_MASK 0x1808
93 /* Device registers */
94 struct zynq_gem_regs {
95 u32 nwctrl; /* Network Control reg */
96 u32 nwcfg; /* Network Config reg */
97 u32 nwsr; /* Network Status reg */
99 u32 dmacr; /* DMA Control reg */
100 u32 txsr; /* TX Status reg */
101 u32 rxqbase; /* RX Q Base address reg */
102 u32 txqbase; /* TX Q Base address reg */
103 u32 rxsr; /* RX Status reg */
105 u32 idr; /* Interrupt Disable reg */
107 u32 phymntnc; /* Phy Maintaince reg */
109 u32 hashl; /* Hash Low address reg */
110 u32 hashh; /* Hash High address reg */
113 u32 laddr[4][LADDR_HIGH + 1]; /* Specific1 addr low/high reg */
114 u32 match[4]; /* Type ID1 Match reg */
116 u32 stat[44]; /* Octects transmitted Low reg - stat start */
121 u32 addr; /* Next descriptor pointer */
127 /* Initialized, rxbd_current, rx_first_buf must be 0 after init */
128 struct zynq_gem_priv {
129 struct emac_bd tx_bd;
130 struct emac_bd rx_bd[RX_BUF];
131 char rxbuffers[RX_BUF * PKTSIZE_ALIGN];
137 struct phy_device *phydev;
141 static inline int mdio_wait(struct eth_device *dev)
143 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
146 /* Wait till MDIO interface is ready to accept a new transaction. */
148 if (readl(®s->nwsr) & ZYNQ_GEM_NWSR_MDIOIDLE_MASK)
154 printf("%s: Timeout\n", __func__);
161 static u32 phy_setup_op(struct eth_device *dev, u32 phy_addr, u32 regnum,
165 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
170 /* Construct mgtcr mask for the operation */
171 mgtcr = ZYNQ_GEM_PHYMNTNC_OP_MASK | op |
172 (phy_addr << ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK) |
173 (regnum << ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK) | *data;
175 /* Write mgtcr and wait for completion */
176 writel(mgtcr, ®s->phymntnc);
181 if (op == ZYNQ_GEM_PHYMNTNC_OP_R_MASK)
182 *data = readl(®s->phymntnc);
187 static u32 phyread(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 *val)
189 return phy_setup_op(dev, phy_addr, regnum,
190 ZYNQ_GEM_PHYMNTNC_OP_R_MASK, val);
193 static u32 phywrite(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 data)
195 return phy_setup_op(dev, phy_addr, regnum,
196 ZYNQ_GEM_PHYMNTNC_OP_W_MASK, &data);
199 static void phy_detection(struct eth_device *dev)
203 struct zynq_gem_priv *priv = dev->priv;
205 if (priv->phyaddr != -1) {
206 phyread(dev, priv->phyaddr, PHY_DETECT_REG, &phyreg);
207 if ((phyreg != 0xFFFF) &&
208 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
209 /* Found a valid PHY address */
210 debug("Default phy address %d is valid\n",
214 debug("PHY address is not setup correctly %d\n",
220 debug("detecting phy address\n");
221 if (priv->phyaddr == -1) {
222 /* detect the PHY address */
223 for (i = 31; i >= 0; i--) {
224 phyread(dev, i, PHY_DETECT_REG, &phyreg);
225 if ((phyreg != 0xFFFF) &&
226 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
227 /* Found a valid PHY address */
229 debug("Found valid phy address, %d\n", i);
234 printf("PHY is not detected\n");
237 static int zynq_gem_setup_mac(struct eth_device *dev)
239 u32 i, macaddrlow, macaddrhigh;
240 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
242 /* Set the MAC bits [31:0] in BOT */
243 macaddrlow = dev->enetaddr[0];
244 macaddrlow |= dev->enetaddr[1] << 8;
245 macaddrlow |= dev->enetaddr[2] << 16;
246 macaddrlow |= dev->enetaddr[3] << 24;
248 /* Set MAC bits [47:32] in TOP */
249 macaddrhigh = dev->enetaddr[4];
250 macaddrhigh |= dev->enetaddr[5] << 8;
252 for (i = 0; i < 4; i++) {
253 writel(0, ®s->laddr[i][LADDR_LOW]);
254 writel(0, ®s->laddr[i][LADDR_HIGH]);
255 /* Do not use MATCHx register */
256 writel(0, ®s->match[i]);
259 writel(macaddrlow, ®s->laddr[0][LADDR_LOW]);
260 writel(macaddrhigh, ®s->laddr[0][LADDR_HIGH]);
265 static int zynq_gem_init(struct eth_device *dev, bd_t * bis)
267 u32 i, rclk, clk = 0;
268 struct phy_device *phydev;
269 const u32 stat_size = (sizeof(struct zynq_gem_regs) -
270 offsetof(struct zynq_gem_regs, stat)) / 4;
271 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
272 struct zynq_gem_priv *priv = dev->priv;
273 const u32 supported = SUPPORTED_10baseT_Half |
274 SUPPORTED_10baseT_Full |
275 SUPPORTED_100baseT_Half |
276 SUPPORTED_100baseT_Full |
277 SUPPORTED_1000baseT_Half |
278 SUPPORTED_1000baseT_Full;
281 /* Disable all interrupts */
282 writel(0xFFFFFFFF, ®s->idr);
284 /* Disable the receiver & transmitter */
285 writel(0, ®s->nwctrl);
286 writel(0, ®s->txsr);
287 writel(0, ®s->rxsr);
288 writel(0, ®s->phymntnc);
290 /* Clear the Hash registers for the mac address
291 * pointed by AddressPtr
293 writel(0x0, ®s->hashl);
294 /* Write bits [63:32] in TOP */
295 writel(0x0, ®s->hashh);
297 /* Clear all counters */
298 for (i = 0; i <= stat_size; i++)
299 readl(®s->stat[i]);
301 /* Setup RxBD space */
302 memset(&(priv->rx_bd), 0, sizeof(priv->rx_bd));
303 /* Create the RxBD ring */
304 memset(&(priv->rxbuffers), 0, sizeof(priv->rxbuffers));
306 for (i = 0; i < RX_BUF; i++) {
307 priv->rx_bd[i].status = 0xF0000000;
308 priv->rx_bd[i].addr =
309 (u32)((char *)&(priv->rxbuffers) +
310 (i * PKTSIZE_ALIGN));
312 /* WRAP bit to last BD */
313 priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK;
314 /* Write RxBDs to IP */
315 writel((u32)&(priv->rx_bd), ®s->rxqbase);
317 /* Setup for DMA Configuration register */
318 writel(ZYNQ_GEM_DMACR_INIT, ®s->dmacr);
320 /* Setup for Network Control register, MDIO, Rx and Tx enable */
321 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_MDEN_MASK);
328 /* interface - look at tsec */
329 phydev = phy_connect(priv->bus, priv->phyaddr, dev, 0);
331 phydev->supported = supported | ADVERTISED_Pause |
332 ADVERTISED_Asym_Pause;
333 phydev->advertising = phydev->supported;
334 priv->phydev = phydev;
338 switch (phydev->speed) {
340 writel(ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED1000,
342 rclk = (0 << 4) | (1 << 0);
343 clk = (1 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
346 clrsetbits_le32(®s->nwcfg, ZYNQ_GEM_NWCFG_SPEED1000,
347 ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED100);
349 clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
354 clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
358 /* Change the rclk and clk only not using EMIO interface */
360 zynq_slcr_gem_clk_setup(dev->iobase !=
361 ZYNQ_GEM_BASEADDR0, rclk, clk);
363 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK |
364 ZYNQ_GEM_NWCTRL_TXEN_MASK);
369 static int zynq_gem_send(struct eth_device *dev, void *ptr, int len)
372 struct zynq_gem_priv *priv = dev->priv;
373 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
374 const u32 mask = ZYNQ_GEM_TXSR_HRESPNOK_MASK | \
375 ZYNQ_GEM_TXSR_URUN_MASK | ZYNQ_GEM_TXSR_BUFEXH_MASK;
378 writel((u32)&(priv->tx_bd), ®s->txqbase);
381 memset((void *)&(priv->tx_bd), 0, sizeof(struct emac_bd));
383 priv->tx_bd.addr = (u32)ptr;
384 priv->tx_bd.status = len | ZYNQ_GEM_TXBUF_LAST_MASK;
387 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK);
389 /* Read the stat register to know if the packet has been transmitted */
390 status = readl(®s->txsr);
392 printf("Something has gone wrong here!? Status is 0x%x.\n",
395 /* Clear Tx status register before leaving . */
396 writel(status, ®s->txsr);
400 /* Do not check frame_recd flag in rx_status register 0x20 - just poll BD */
401 static int zynq_gem_recv(struct eth_device *dev)
404 struct zynq_gem_priv *priv = dev->priv;
405 struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current];
406 struct emac_bd *first_bd;
408 if (!(current_bd->addr & ZYNQ_GEM_RXBUF_NEW_MASK))
411 if (!(current_bd->status &
412 (ZYNQ_GEM_RXBUF_SOF_MASK | ZYNQ_GEM_RXBUF_EOF_MASK))) {
413 printf("GEM: SOF or EOF not set for last buffer received!\n");
417 frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK;
419 NetReceive((u8 *) (current_bd->addr &
420 ZYNQ_GEM_RXBUF_ADD_MASK), frame_len);
422 if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK)
423 priv->rx_first_buf = priv->rxbd_current;
425 current_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
426 current_bd->status = 0xF0000000; /* FIXME */
429 if (current_bd->status & ZYNQ_GEM_RXBUF_EOF_MASK) {
430 first_bd = &priv->rx_bd[priv->rx_first_buf];
431 first_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
432 first_bd->status = 0xF0000000;
435 if ((++priv->rxbd_current) >= RX_BUF)
436 priv->rxbd_current = 0;
442 static void zynq_gem_halt(struct eth_device *dev)
444 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
446 clrsetbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK |
447 ZYNQ_GEM_NWCTRL_TXEN_MASK, 0);
450 static int zynq_gem_miiphyread(const char *devname, uchar addr,
451 uchar reg, ushort *val)
453 struct eth_device *dev = eth_get_dev();
456 ret = phyread(dev, addr, reg, val);
457 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, *val);
461 static int zynq_gem_miiphy_write(const char *devname, uchar addr,
462 uchar reg, ushort val)
464 struct eth_device *dev = eth_get_dev();
466 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, val);
467 return phywrite(dev, addr, reg, val);
470 int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr, u32 emio)
472 struct eth_device *dev;
473 struct zynq_gem_priv *priv;
475 dev = calloc(1, sizeof(*dev));
479 dev->priv = calloc(1, sizeof(struct zynq_gem_priv));
480 if (dev->priv == NULL) {
486 priv->phyaddr = phy_addr;
489 sprintf(dev->name, "Gem.%x", base_addr);
491 dev->iobase = base_addr;
493 dev->init = zynq_gem_init;
494 dev->halt = zynq_gem_halt;
495 dev->send = zynq_gem_send;
496 dev->recv = zynq_gem_recv;
497 dev->write_hwaddr = zynq_gem_setup_mac;
501 miiphy_register(dev->name, zynq_gem_miiphyread, zynq_gem_miiphy_write);
502 priv->bus = miiphy_get_dev_by_name(dev->name);