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_NWCTRL_TXEN_MASK 0x00000008 /* Enable transmit */
47 #define ZYNQ_GEM_NWCTRL_RXEN_MASK 0x00000004 /* Enable receive */
48 #define ZYNQ_GEM_NWCTRL_MDEN_MASK 0x00000010 /* Enable MDIO port */
49 #define ZYNQ_GEM_NWCTRL_STARTTX_MASK 0x00000200 /* Start tx (tx_go) */
51 #define ZYNQ_GEM_NWCFG_SPEED100 0x000000001 /* 100 Mbps operation */
52 #define ZYNQ_GEM_NWCFG_SPEED1000 0x000000400 /* 1Gbps operation */
53 #define ZYNQ_GEM_NWCFG_FDEN 0x000000002 /* Full Duplex mode */
54 #define ZYNQ_GEM_NWCFG_FSREM 0x000020000 /* FCS removal */
55 #define ZYNQ_GEM_NWCFG_MDCCLKDIV 0x000080000 /* Div pclk by 32, 80MHz */
56 #define ZYNQ_GEM_NWCFG_MDCCLKDIV2 0x0000c0000 /* Div pclk by 48, 120MHz */
58 #define ZYNQ_GEM_NWCFG_INIT (ZYNQ_GEM_NWCFG_FDEN | \
59 ZYNQ_GEM_NWCFG_FSREM | \
60 ZYNQ_GEM_NWCFG_MDCCLKDIV)
62 #define ZYNQ_GEM_NWSR_MDIOIDLE_MASK 0x00000004 /* PHY management idle */
64 #define ZYNQ_GEM_DMACR_BLENGTH 0x00000004 /* INCR4 AHB bursts */
65 /* Use full configured addressable space (8 Kb) */
66 #define ZYNQ_GEM_DMACR_RXSIZE 0x00000300
67 /* Use full configured addressable space (4 Kb) */
68 #define ZYNQ_GEM_DMACR_TXSIZE 0x00000400
69 /* Set with binary 00011000 to use 1536 byte(1*max length frame/buffer) */
70 #define ZYNQ_GEM_DMACR_RXBUF 0x00180000
72 #define ZYNQ_GEM_DMACR_INIT (ZYNQ_GEM_DMACR_BLENGTH | \
73 ZYNQ_GEM_DMACR_RXSIZE | \
74 ZYNQ_GEM_DMACR_TXSIZE | \
77 /* Use MII register 1 (MII status register) to detect PHY */
78 #define PHY_DETECT_REG 1
80 /* Mask used to verify certain PHY features (or register contents)
81 * in the register above:
82 * 0x1000: 10Mbps full duplex support
83 * 0x0800: 10Mbps half duplex support
84 * 0x0008: Auto-negotiation support
86 #define PHY_DETECT_MASK 0x1808
88 /* TX BD status masks */
89 #define ZYNQ_GEM_TXBUF_FRMLEN_MASK 0x000007ff
90 #define ZYNQ_GEM_TXBUF_EXHAUSTED 0x08000000
91 #define ZYNQ_GEM_TXBUF_UNDERRUN 0x10000000
93 /* Clock frequencies for different speeds */
94 #define ZYNQ_GEM_FREQUENCY_10 2500000UL
95 #define ZYNQ_GEM_FREQUENCY_100 25000000UL
96 #define ZYNQ_GEM_FREQUENCY_1000 125000000UL
98 /* Device registers */
99 struct zynq_gem_regs {
100 u32 nwctrl; /* Network Control reg */
101 u32 nwcfg; /* Network Config reg */
102 u32 nwsr; /* Network Status reg */
104 u32 dmacr; /* DMA Control reg */
105 u32 txsr; /* TX Status reg */
106 u32 rxqbase; /* RX Q Base address reg */
107 u32 txqbase; /* TX Q Base address reg */
108 u32 rxsr; /* RX Status reg */
110 u32 idr; /* Interrupt Disable reg */
112 u32 phymntnc; /* Phy Maintaince reg */
114 u32 hashl; /* Hash Low address reg */
115 u32 hashh; /* Hash High address reg */
118 u32 laddr[4][LADDR_HIGH + 1]; /* Specific1 addr low/high reg */
119 u32 match[4]; /* Type ID1 Match reg */
121 u32 stat[44]; /* Octects transmitted Low reg - stat start */
126 u32 addr; /* Next descriptor pointer */
131 /* Page table entries are set to 1MB, or multiples of 1MB
132 * (not < 1MB). driver uses less bd's so use 1MB bdspace.
134 #define BD_SPACE 0x100000
135 /* BD separation space */
136 #define BD_SEPRN_SPACE 64
138 /* Initialized, rxbd_current, rx_first_buf must be 0 after init */
139 struct zynq_gem_priv {
140 struct emac_bd *tx_bd;
141 struct emac_bd *rx_bd;
148 struct phy_device *phydev;
152 static inline int mdio_wait(struct eth_device *dev)
154 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
157 /* Wait till MDIO interface is ready to accept a new transaction. */
159 if (readl(®s->nwsr) & ZYNQ_GEM_NWSR_MDIOIDLE_MASK)
165 printf("%s: Timeout\n", __func__);
172 static u32 phy_setup_op(struct eth_device *dev, u32 phy_addr, u32 regnum,
176 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
181 /* Construct mgtcr mask for the operation */
182 mgtcr = ZYNQ_GEM_PHYMNTNC_OP_MASK | op |
183 (phy_addr << ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK) |
184 (regnum << ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK) | *data;
186 /* Write mgtcr and wait for completion */
187 writel(mgtcr, ®s->phymntnc);
192 if (op == ZYNQ_GEM_PHYMNTNC_OP_R_MASK)
193 *data = readl(®s->phymntnc);
198 static u32 phyread(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 *val)
200 return phy_setup_op(dev, phy_addr, regnum,
201 ZYNQ_GEM_PHYMNTNC_OP_R_MASK, val);
204 static u32 phywrite(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 data)
206 return phy_setup_op(dev, phy_addr, regnum,
207 ZYNQ_GEM_PHYMNTNC_OP_W_MASK, &data);
210 static void phy_detection(struct eth_device *dev)
214 struct zynq_gem_priv *priv = dev->priv;
216 if (priv->phyaddr != -1) {
217 phyread(dev, priv->phyaddr, PHY_DETECT_REG, &phyreg);
218 if ((phyreg != 0xFFFF) &&
219 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
220 /* Found a valid PHY address */
221 debug("Default phy address %d is valid\n",
225 debug("PHY address is not setup correctly %d\n",
231 debug("detecting phy address\n");
232 if (priv->phyaddr == -1) {
233 /* detect the PHY address */
234 for (i = 31; i >= 0; i--) {
235 phyread(dev, i, PHY_DETECT_REG, &phyreg);
236 if ((phyreg != 0xFFFF) &&
237 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
238 /* Found a valid PHY address */
240 debug("Found valid phy address, %d\n", i);
245 printf("PHY is not detected\n");
248 static int zynq_gem_setup_mac(struct eth_device *dev)
250 u32 i, macaddrlow, macaddrhigh;
251 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
253 /* Set the MAC bits [31:0] in BOT */
254 macaddrlow = dev->enetaddr[0];
255 macaddrlow |= dev->enetaddr[1] << 8;
256 macaddrlow |= dev->enetaddr[2] << 16;
257 macaddrlow |= dev->enetaddr[3] << 24;
259 /* Set MAC bits [47:32] in TOP */
260 macaddrhigh = dev->enetaddr[4];
261 macaddrhigh |= dev->enetaddr[5] << 8;
263 for (i = 0; i < 4; i++) {
264 writel(0, ®s->laddr[i][LADDR_LOW]);
265 writel(0, ®s->laddr[i][LADDR_HIGH]);
266 /* Do not use MATCHx register */
267 writel(0, ®s->match[i]);
270 writel(macaddrlow, ®s->laddr[0][LADDR_LOW]);
271 writel(macaddrhigh, ®s->laddr[0][LADDR_HIGH]);
276 static int zynq_gem_init(struct eth_device *dev, bd_t * bis)
279 unsigned long clk_rate = 0;
280 struct phy_device *phydev;
281 const u32 stat_size = (sizeof(struct zynq_gem_regs) -
282 offsetof(struct zynq_gem_regs, stat)) / 4;
283 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
284 struct zynq_gem_priv *priv = dev->priv;
285 const u32 supported = SUPPORTED_10baseT_Half |
286 SUPPORTED_10baseT_Full |
287 SUPPORTED_100baseT_Half |
288 SUPPORTED_100baseT_Full |
289 SUPPORTED_1000baseT_Half |
290 SUPPORTED_1000baseT_Full;
293 /* Disable all interrupts */
294 writel(0xFFFFFFFF, ®s->idr);
296 /* Disable the receiver & transmitter */
297 writel(0, ®s->nwctrl);
298 writel(0, ®s->txsr);
299 writel(0, ®s->rxsr);
300 writel(0, ®s->phymntnc);
302 /* Clear the Hash registers for the mac address
303 * pointed by AddressPtr
305 writel(0x0, ®s->hashl);
306 /* Write bits [63:32] in TOP */
307 writel(0x0, ®s->hashh);
309 /* Clear all counters */
310 for (i = 0; i <= stat_size; i++)
311 readl(®s->stat[i]);
313 /* Setup RxBD space */
314 memset(priv->rx_bd, 0, RX_BUF * sizeof(struct emac_bd));
316 for (i = 0; i < RX_BUF; i++) {
317 priv->rx_bd[i].status = 0xF0000000;
318 priv->rx_bd[i].addr =
319 ((u32)(priv->rxbuffers) +
320 (i * PKTSIZE_ALIGN));
322 /* WRAP bit to last BD */
323 priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK;
324 /* Write RxBDs to IP */
325 writel((u32)priv->rx_bd, ®s->rxqbase);
327 /* Setup for DMA Configuration register */
328 writel(ZYNQ_GEM_DMACR_INIT, ®s->dmacr);
330 /* Setup for Network Control register, MDIO, Rx and Tx enable */
331 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_MDEN_MASK);
338 /* interface - look at tsec */
339 phydev = phy_connect(priv->bus, priv->phyaddr, dev, 0);
341 phydev->supported = supported | ADVERTISED_Pause |
342 ADVERTISED_Asym_Pause;
343 phydev->advertising = phydev->supported;
344 priv->phydev = phydev;
349 printf("%s: No link.\n", phydev->dev->name);
353 switch (phydev->speed) {
355 writel(ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED1000,
357 clk_rate = ZYNQ_GEM_FREQUENCY_1000;
360 clrsetbits_le32(®s->nwcfg, ZYNQ_GEM_NWCFG_SPEED1000,
361 ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED100);
362 clk_rate = ZYNQ_GEM_FREQUENCY_100;
365 clk_rate = ZYNQ_GEM_FREQUENCY_10;
369 /* Change the rclk and clk only not using EMIO interface */
371 zynq_slcr_gem_clk_setup(dev->iobase !=
372 ZYNQ_GEM_BASEADDR0, clk_rate);
374 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK |
375 ZYNQ_GEM_NWCTRL_TXEN_MASK);
380 static int zynq_gem_send(struct eth_device *dev, void *ptr, int len)
383 struct zynq_gem_priv *priv = dev->priv;
384 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
387 writel((u32)priv->tx_bd, ®s->txqbase);
390 memset(priv->tx_bd, 0, sizeof(struct emac_bd));
392 priv->tx_bd->addr = (u32)ptr;
393 priv->tx_bd->status = (len & ZYNQ_GEM_TXBUF_FRMLEN_MASK) |
394 ZYNQ_GEM_TXBUF_LAST_MASK;
397 addr &= ~(ARCH_DMA_MINALIGN - 1);
398 size = roundup(len, ARCH_DMA_MINALIGN);
399 flush_dcache_range(addr, addr + size);
403 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK);
405 /* Read TX BD status */
406 if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_UNDERRUN)
407 printf("TX underrun\n");
408 if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_EXHAUSTED)
409 printf("TX buffers exhausted in mid frame\n");
414 /* Do not check frame_recd flag in rx_status register 0x20 - just poll BD */
415 static int zynq_gem_recv(struct eth_device *dev)
418 struct zynq_gem_priv *priv = dev->priv;
419 struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current];
420 struct emac_bd *first_bd;
422 if (!(current_bd->addr & ZYNQ_GEM_RXBUF_NEW_MASK))
425 if (!(current_bd->status &
426 (ZYNQ_GEM_RXBUF_SOF_MASK | ZYNQ_GEM_RXBUF_EOF_MASK))) {
427 printf("GEM: SOF or EOF not set for last buffer received!\n");
431 frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK;
433 u32 addr = current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK;
434 addr &= ~(ARCH_DMA_MINALIGN - 1);
435 u32 size = roundup(frame_len, ARCH_DMA_MINALIGN);
436 invalidate_dcache_range(addr, addr + size);
438 NetReceive((u8 *)addr, frame_len);
440 if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK)
441 priv->rx_first_buf = priv->rxbd_current;
443 current_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
444 current_bd->status = 0xF0000000; /* FIXME */
447 if (current_bd->status & ZYNQ_GEM_RXBUF_EOF_MASK) {
448 first_bd = &priv->rx_bd[priv->rx_first_buf];
449 first_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
450 first_bd->status = 0xF0000000;
453 if ((++priv->rxbd_current) >= RX_BUF)
454 priv->rxbd_current = 0;
460 static void zynq_gem_halt(struct eth_device *dev)
462 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
464 clrsetbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK |
465 ZYNQ_GEM_NWCTRL_TXEN_MASK, 0);
468 static int zynq_gem_miiphyread(const char *devname, uchar addr,
469 uchar reg, ushort *val)
471 struct eth_device *dev = eth_get_dev();
474 ret = phyread(dev, addr, reg, val);
475 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, *val);
479 static int zynq_gem_miiphy_write(const char *devname, uchar addr,
480 uchar reg, ushort val)
482 struct eth_device *dev = eth_get_dev();
484 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, val);
485 return phywrite(dev, addr, reg, val);
488 int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr, u32 emio)
490 struct eth_device *dev;
491 struct zynq_gem_priv *priv;
494 dev = calloc(1, sizeof(*dev));
498 dev->priv = calloc(1, sizeof(struct zynq_gem_priv));
499 if (dev->priv == NULL) {
505 /* Align rxbuffers to ARCH_DMA_MINALIGN */
506 priv->rxbuffers = memalign(ARCH_DMA_MINALIGN, RX_BUF * PKTSIZE_ALIGN);
507 memset(priv->rxbuffers, 0, RX_BUF * PKTSIZE_ALIGN);
509 /* Align bd_space to 1MB */
510 bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE);
511 mmu_set_region_dcache_behaviour((u32)bd_space, BD_SPACE, DCACHE_OFF);
513 /* Initialize the bd spaces for tx and rx bd's */
514 priv->tx_bd = (struct emac_bd *)bd_space;
515 priv->rx_bd = (struct emac_bd *)((u32)bd_space + BD_SEPRN_SPACE);
517 priv->phyaddr = phy_addr;
520 sprintf(dev->name, "Gem.%x", base_addr);
522 dev->iobase = base_addr;
524 dev->init = zynq_gem_init;
525 dev->halt = zynq_gem_halt;
526 dev->send = zynq_gem_send;
527 dev->recv = zynq_gem_recv;
528 dev->write_hwaddr = zynq_gem_setup_mac;
532 miiphy_register(dev->name, zynq_gem_miiphyread, zynq_gem_miiphy_write);
533 priv->bus = miiphy_get_dev_by_name(dev->name);