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+
23 #include <asm/system.h>
24 #include <asm/arch/hardware.h>
25 #include <asm/arch/sys_proto.h>
27 #if !defined(CONFIG_PHYLIB)
28 # error XILINX_GEM_ETHERNET requires PHYLIB
31 /* Bit/mask specification */
32 #define ZYNQ_GEM_PHYMNTNC_OP_MASK 0x40020000 /* operation mask bits */
33 #define ZYNQ_GEM_PHYMNTNC_OP_R_MASK 0x20000000 /* read operation */
34 #define ZYNQ_GEM_PHYMNTNC_OP_W_MASK 0x10000000 /* write operation */
35 #define ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK 23 /* Shift bits for PHYAD */
36 #define ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK 18 /* Shift bits for PHREG */
38 #define ZYNQ_GEM_RXBUF_EOF_MASK 0x00008000 /* End of frame. */
39 #define ZYNQ_GEM_RXBUF_SOF_MASK 0x00004000 /* Start of frame. */
40 #define ZYNQ_GEM_RXBUF_LEN_MASK 0x00003FFF /* Mask for length field */
42 #define ZYNQ_GEM_RXBUF_WRAP_MASK 0x00000002 /* Wrap bit, last BD */
43 #define ZYNQ_GEM_RXBUF_NEW_MASK 0x00000001 /* Used bit.. */
44 #define ZYNQ_GEM_RXBUF_ADD_MASK 0xFFFFFFFC /* Mask for address */
46 /* Wrap bit, last descriptor */
47 #define ZYNQ_GEM_TXBUF_WRAP_MASK 0x40000000
48 #define ZYNQ_GEM_TXBUF_LAST_MASK 0x00008000 /* Last buffer */
49 #define ZYNQ_GEM_TXBUF_USED_MASK 0x80000000 /* Used by Hw */
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 */
64 # define ZYNQ_GEM_DBUS_WIDTH (1 << 21) /* 64 bit bus */
66 # define ZYNQ_GEM_DBUS_WIDTH (0 << 21) /* 32 bit bus */
69 #define ZYNQ_GEM_NWCFG_INIT (ZYNQ_GEM_DBUS_WIDTH | \
70 ZYNQ_GEM_NWCFG_FDEN | \
71 ZYNQ_GEM_NWCFG_FSREM | \
72 ZYNQ_GEM_NWCFG_MDCCLKDIV)
74 #define ZYNQ_GEM_NWSR_MDIOIDLE_MASK 0x00000004 /* PHY management idle */
76 #define ZYNQ_GEM_DMACR_BLENGTH 0x00000004 /* INCR4 AHB bursts */
77 /* Use full configured addressable space (8 Kb) */
78 #define ZYNQ_GEM_DMACR_RXSIZE 0x00000300
79 /* Use full configured addressable space (4 Kb) */
80 #define ZYNQ_GEM_DMACR_TXSIZE 0x00000400
81 /* Set with binary 00011000 to use 1536 byte(1*max length frame/buffer) */
82 #define ZYNQ_GEM_DMACR_RXBUF 0x00180000
84 #define ZYNQ_GEM_DMACR_INIT (ZYNQ_GEM_DMACR_BLENGTH | \
85 ZYNQ_GEM_DMACR_RXSIZE | \
86 ZYNQ_GEM_DMACR_TXSIZE | \
89 /* Use MII register 1 (MII status register) to detect PHY */
90 #define PHY_DETECT_REG 1
92 /* Mask used to verify certain PHY features (or register contents)
93 * in the register above:
94 * 0x1000: 10Mbps full duplex support
95 * 0x0800: 10Mbps half duplex support
96 * 0x0008: Auto-negotiation support
98 #define PHY_DETECT_MASK 0x1808
100 /* TX BD status masks */
101 #define ZYNQ_GEM_TXBUF_FRMLEN_MASK 0x000007ff
102 #define ZYNQ_GEM_TXBUF_EXHAUSTED 0x08000000
103 #define ZYNQ_GEM_TXBUF_UNDERRUN 0x10000000
105 /* Clock frequencies for different speeds */
106 #define ZYNQ_GEM_FREQUENCY_10 2500000UL
107 #define ZYNQ_GEM_FREQUENCY_100 25000000UL
108 #define ZYNQ_GEM_FREQUENCY_1000 125000000UL
110 /* Device registers */
111 struct zynq_gem_regs {
112 u32 nwctrl; /* 0x0 - Network Control reg */
113 u32 nwcfg; /* 0x4 - Network Config reg */
114 u32 nwsr; /* 0x8 - Network Status reg */
116 u32 dmacr; /* 0x10 - DMA Control reg */
117 u32 txsr; /* 0x14 - TX Status reg */
118 u32 rxqbase; /* 0x18 - RX Q Base address reg */
119 u32 txqbase; /* 0x1c - TX Q Base address reg */
120 u32 rxsr; /* 0x20 - RX Status reg */
122 u32 idr; /* 0x2c - Interrupt Disable reg */
124 u32 phymntnc; /* 0x34 - Phy Maintaince reg */
126 u32 hashl; /* 0x80 - Hash Low address reg */
127 u32 hashh; /* 0x84 - Hash High address reg */
130 u32 laddr[4][LADDR_HIGH + 1]; /* 0x8c - Specific1 addr low/high reg */
131 u32 match[4]; /* 0xa8 - Type ID1 Match reg */
134 u32 stat[STAT_SIZE]; /* 0x100 - Octects transmitted Low reg */
136 u32 transmit_q1_ptr; /* 0x440 - Transmit priority queue 1 */
138 u32 receive_q1_ptr; /* 0x480 - Receive priority queue 1 */
143 u32 addr; /* Next descriptor pointer */
148 /* Page table entries are set to 1MB, or multiples of 1MB
149 * (not < 1MB). driver uses less bd's so use 1MB bdspace.
151 #define BD_SPACE 0x100000
152 /* BD separation space */
153 #define BD_SEPRN_SPACE (RX_BUF * sizeof(struct emac_bd))
155 /* Setup the first free TX descriptor */
156 #define TX_FREE_DESC 2
158 /* Initialized, rxbd_current, rx_first_buf must be 0 after init */
159 struct zynq_gem_priv {
160 struct emac_bd *tx_bd;
161 struct emac_bd *rx_bd;
168 phy_interface_t interface;
169 struct phy_device *phydev;
173 static inline int mdio_wait(struct eth_device *dev)
175 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
178 /* Wait till MDIO interface is ready to accept a new transaction. */
180 if (readl(®s->nwsr) & ZYNQ_GEM_NWSR_MDIOIDLE_MASK)
186 printf("%s: Timeout\n", __func__);
193 static u32 phy_setup_op(struct eth_device *dev, u32 phy_addr, u32 regnum,
197 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
202 /* Construct mgtcr mask for the operation */
203 mgtcr = ZYNQ_GEM_PHYMNTNC_OP_MASK | op |
204 (phy_addr << ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK) |
205 (regnum << ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK) | *data;
207 /* Write mgtcr and wait for completion */
208 writel(mgtcr, ®s->phymntnc);
213 if (op == ZYNQ_GEM_PHYMNTNC_OP_R_MASK)
214 *data = readl(®s->phymntnc);
219 static u32 phyread(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 *val)
223 ret = phy_setup_op(dev, phy_addr, regnum,
224 ZYNQ_GEM_PHYMNTNC_OP_R_MASK, val);
227 debug("%s: phy_addr %d, regnum 0x%x, val 0x%x\n", __func__,
228 phy_addr, regnum, *val);
233 static u32 phywrite(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 data)
235 debug("%s: phy_addr %d, regnum 0x%x, data 0x%x\n", __func__, phy_addr,
238 return phy_setup_op(dev, phy_addr, regnum,
239 ZYNQ_GEM_PHYMNTNC_OP_W_MASK, &data);
242 static void phy_detection(struct eth_device *dev)
246 struct zynq_gem_priv *priv = dev->priv;
248 if (priv->phyaddr != -1) {
249 phyread(dev, priv->phyaddr, PHY_DETECT_REG, &phyreg);
250 if ((phyreg != 0xFFFF) &&
251 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
252 /* Found a valid PHY address */
253 debug("Default phy address %d is valid\n",
257 debug("PHY address is not setup correctly %d\n",
263 debug("detecting phy address\n");
264 if (priv->phyaddr == -1) {
265 /* detect the PHY address */
266 for (i = 31; i >= 0; i--) {
267 phyread(dev, i, PHY_DETECT_REG, &phyreg);
268 if ((phyreg != 0xFFFF) &&
269 ((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
270 /* Found a valid PHY address */
272 debug("Found valid phy address, %d\n", i);
277 printf("PHY is not detected\n");
280 static int zynq_gem_setup_mac(struct eth_device *dev)
282 u32 i, macaddrlow, macaddrhigh;
283 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
285 /* Set the MAC bits [31:0] in BOT */
286 macaddrlow = dev->enetaddr[0];
287 macaddrlow |= dev->enetaddr[1] << 8;
288 macaddrlow |= dev->enetaddr[2] << 16;
289 macaddrlow |= dev->enetaddr[3] << 24;
291 /* Set MAC bits [47:32] in TOP */
292 macaddrhigh = dev->enetaddr[4];
293 macaddrhigh |= dev->enetaddr[5] << 8;
295 for (i = 0; i < 4; i++) {
296 writel(0, ®s->laddr[i][LADDR_LOW]);
297 writel(0, ®s->laddr[i][LADDR_HIGH]);
298 /* Do not use MATCHx register */
299 writel(0, ®s->match[i]);
302 writel(macaddrlow, ®s->laddr[0][LADDR_LOW]);
303 writel(macaddrhigh, ®s->laddr[0][LADDR_HIGH]);
308 static int zynq_gem_init(struct eth_device *dev, bd_t * bis)
311 unsigned long clk_rate = 0;
312 struct phy_device *phydev;
313 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
314 struct zynq_gem_priv *priv = dev->priv;
315 struct emac_bd *dummy_tx_bd = &priv->tx_bd[TX_FREE_DESC];
316 struct emac_bd *dummy_rx_bd = &priv->tx_bd[TX_FREE_DESC + 2];
317 const u32 supported = SUPPORTED_10baseT_Half |
318 SUPPORTED_10baseT_Full |
319 SUPPORTED_100baseT_Half |
320 SUPPORTED_100baseT_Full |
321 SUPPORTED_1000baseT_Half |
322 SUPPORTED_1000baseT_Full;
325 /* Disable all interrupts */
326 writel(0xFFFFFFFF, ®s->idr);
328 /* Disable the receiver & transmitter */
329 writel(0, ®s->nwctrl);
330 writel(0, ®s->txsr);
331 writel(0, ®s->rxsr);
332 writel(0, ®s->phymntnc);
334 /* Clear the Hash registers for the mac address
335 * pointed by AddressPtr
337 writel(0x0, ®s->hashl);
338 /* Write bits [63:32] in TOP */
339 writel(0x0, ®s->hashh);
341 /* Clear all counters */
342 for (i = 0; i < STAT_SIZE; i++)
343 readl(®s->stat[i]);
345 /* Setup RxBD space */
346 memset(priv->rx_bd, 0, RX_BUF * sizeof(struct emac_bd));
348 for (i = 0; i < RX_BUF; i++) {
349 priv->rx_bd[i].status = 0xF0000000;
350 priv->rx_bd[i].addr =
351 ((ulong)(priv->rxbuffers) +
352 (i * PKTSIZE_ALIGN));
354 /* WRAP bit to last BD */
355 priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK;
356 /* Write RxBDs to IP */
357 writel((ulong)priv->rx_bd, ®s->rxqbase);
359 /* Setup for DMA Configuration register */
360 writel(ZYNQ_GEM_DMACR_INIT, ®s->dmacr);
362 /* Setup for Network Control register, MDIO, Rx and Tx enable */
363 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_MDEN_MASK);
365 /* Disable the second priority queue */
366 dummy_tx_bd->addr = 0;
367 dummy_tx_bd->status = ZYNQ_GEM_TXBUF_WRAP_MASK |
368 ZYNQ_GEM_TXBUF_LAST_MASK|
369 ZYNQ_GEM_TXBUF_USED_MASK;
371 dummy_rx_bd->addr = ZYNQ_GEM_RXBUF_WRAP_MASK |
372 ZYNQ_GEM_RXBUF_NEW_MASK;
373 dummy_rx_bd->status = 0;
374 flush_dcache_range((ulong)&dummy_tx_bd, (ulong)&dummy_tx_bd +
375 sizeof(dummy_tx_bd));
376 flush_dcache_range((ulong)&dummy_rx_bd, (ulong)&dummy_rx_bd +
377 sizeof(dummy_rx_bd));
379 writel((ulong)dummy_tx_bd, ®s->transmit_q1_ptr);
380 writel((ulong)dummy_rx_bd, ®s->receive_q1_ptr);
387 /* interface - look at tsec */
388 phydev = phy_connect(priv->bus, priv->phyaddr, dev,
391 phydev->supported = supported | ADVERTISED_Pause |
392 ADVERTISED_Asym_Pause;
393 phydev->advertising = phydev->supported;
394 priv->phydev = phydev;
399 printf("%s: No link.\n", phydev->dev->name);
403 switch (phydev->speed) {
405 writel(ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED1000,
407 clk_rate = ZYNQ_GEM_FREQUENCY_1000;
410 clrsetbits_le32(®s->nwcfg, ZYNQ_GEM_NWCFG_SPEED1000,
411 ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED100);
412 clk_rate = ZYNQ_GEM_FREQUENCY_100;
415 clk_rate = ZYNQ_GEM_FREQUENCY_10;
419 /* Change the rclk and clk only not using EMIO interface */
421 zynq_slcr_gem_clk_setup(dev->iobase !=
422 ZYNQ_GEM_BASEADDR0, clk_rate);
424 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK |
425 ZYNQ_GEM_NWCTRL_TXEN_MASK);
430 static int zynq_gem_send(struct eth_device *dev, void *ptr, int len)
433 struct zynq_gem_priv *priv = dev->priv;
434 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
435 struct emac_bd *current_bd = &priv->tx_bd[1];
438 memset(priv->tx_bd, 0, sizeof(struct emac_bd));
440 priv->tx_bd->addr = (ulong)ptr;
441 priv->tx_bd->status = (len & ZYNQ_GEM_TXBUF_FRMLEN_MASK) |
442 ZYNQ_GEM_TXBUF_LAST_MASK;
443 /* Dummy descriptor to mark it as the last in descriptor chain */
444 current_bd->addr = 0x0;
445 current_bd->status = ZYNQ_GEM_TXBUF_WRAP_MASK |
446 ZYNQ_GEM_TXBUF_LAST_MASK|
447 ZYNQ_GEM_TXBUF_USED_MASK;
450 writel((ulong)priv->tx_bd, ®s->txqbase);
453 addr &= ~(ARCH_DMA_MINALIGN - 1);
454 size = roundup(len, ARCH_DMA_MINALIGN);
455 flush_dcache_range(addr, addr + size);
457 addr = (ulong)priv->rxbuffers;
458 addr &= ~(ARCH_DMA_MINALIGN - 1);
459 size = roundup((RX_BUF * PKTSIZE_ALIGN), ARCH_DMA_MINALIGN);
460 flush_dcache_range(addr, addr + size);
464 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK);
466 /* Read TX BD status */
467 if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_EXHAUSTED)
468 printf("TX buffers exhausted in mid frame\n");
473 /* Do not check frame_recd flag in rx_status register 0x20 - just poll BD */
474 static int zynq_gem_recv(struct eth_device *dev)
477 struct zynq_gem_priv *priv = dev->priv;
478 struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current];
479 struct emac_bd *first_bd;
481 if (!(current_bd->addr & ZYNQ_GEM_RXBUF_NEW_MASK))
484 if (!(current_bd->status &
485 (ZYNQ_GEM_RXBUF_SOF_MASK | ZYNQ_GEM_RXBUF_EOF_MASK))) {
486 printf("GEM: SOF or EOF not set for last buffer received!\n");
490 frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK;
492 u32 addr = current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK;
493 addr &= ~(ARCH_DMA_MINALIGN - 1);
495 net_process_received_packet((u8 *)(ulong)addr, frame_len);
497 if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK)
498 priv->rx_first_buf = priv->rxbd_current;
500 current_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
501 current_bd->status = 0xF0000000; /* FIXME */
504 if (current_bd->status & ZYNQ_GEM_RXBUF_EOF_MASK) {
505 first_bd = &priv->rx_bd[priv->rx_first_buf];
506 first_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
507 first_bd->status = 0xF0000000;
510 if ((++priv->rxbd_current) >= RX_BUF)
511 priv->rxbd_current = 0;
517 static void zynq_gem_halt(struct eth_device *dev)
519 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
521 clrsetbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK |
522 ZYNQ_GEM_NWCTRL_TXEN_MASK, 0);
525 static int zynq_gem_miiphyread(const char *devname, uchar addr,
526 uchar reg, ushort *val)
528 struct eth_device *dev = eth_get_dev();
531 ret = phyread(dev, addr, reg, val);
532 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, *val);
536 static int zynq_gem_miiphy_write(const char *devname, uchar addr,
537 uchar reg, ushort val)
539 struct eth_device *dev = eth_get_dev();
541 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, val);
542 return phywrite(dev, addr, reg, val);
545 int zynq_gem_initialize(bd_t *bis, phys_addr_t base_addr,
546 int phy_addr, u32 emio)
548 struct eth_device *dev;
549 struct zynq_gem_priv *priv;
552 dev = calloc(1, sizeof(*dev));
556 dev->priv = calloc(1, sizeof(struct zynq_gem_priv));
557 if (dev->priv == NULL) {
563 /* Align rxbuffers to ARCH_DMA_MINALIGN */
564 priv->rxbuffers = memalign(ARCH_DMA_MINALIGN, RX_BUF * PKTSIZE_ALIGN);
565 memset(priv->rxbuffers, 0, RX_BUF * PKTSIZE_ALIGN);
567 /* Align bd_space to MMU_SECTION_SHIFT */
568 bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE);
569 mmu_set_region_dcache_behaviour((phys_addr_t)bd_space,
570 BD_SPACE, DCACHE_OFF);
572 /* Initialize the bd spaces for tx and rx bd's */
573 priv->tx_bd = (struct emac_bd *)bd_space;
574 priv->rx_bd = (struct emac_bd *)((ulong)bd_space + BD_SEPRN_SPACE);
576 priv->phyaddr = phy_addr;
579 #ifndef CONFIG_ZYNQ_GEM_INTERFACE
580 priv->interface = PHY_INTERFACE_MODE_MII;
582 priv->interface = CONFIG_ZYNQ_GEM_INTERFACE;
585 sprintf(dev->name, "Gem.%lx", base_addr);
587 dev->iobase = base_addr;
589 dev->init = zynq_gem_init;
590 dev->halt = zynq_gem_halt;
591 dev->send = zynq_gem_send;
592 dev->recv = zynq_gem_recv;
593 dev->write_hwaddr = zynq_gem_setup_mac;
597 miiphy_register(dev->name, zynq_gem_miiphyread, zynq_gem_miiphy_write);
598 priv->bus = miiphy_get_dev_by_name(dev->name);
603 #if CONFIG_IS_ENABLED(OF_CONTROL)
604 int zynq_gem_of_init(const void *blob)
610 debug("ZYNQ GEM: Initialization\n");
613 offset = fdt_node_offset_by_compatible(blob, offset,
614 "xlnx,ps7-ethernet-1.00.a");
616 reg = fdtdec_get_addr(blob, offset, "reg");
617 if (reg != FDT_ADDR_T_NONE) {
618 offset = fdtdec_lookup_phandle(blob, offset,
621 phy_reg = fdtdec_get_addr(blob, offset,
626 debug("ZYNQ GEM: addr %x, phyaddr %x\n",
629 ret |= zynq_gem_initialize(NULL, reg,
633 debug("ZYNQ GEM: Can't get base address\n");
637 } while (offset != -1);