2 * (C) Copyright 2011 Michal Simek
4 * Michal SIMEK <monstr@monstr.eu>
6 * Based on Xilinx gmac driver:
7 * (C) Copyright 2011 Xilinx
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
36 #include <asm/arch/hardware.h>
37 #include <asm/arch/sys_proto.h>
39 #if !defined(CONFIG_PHYLIB)
40 # error XILINX_GEM_ETHERNET requires PHYLIB
43 /* Bit/mask specification */
44 #define ZYNQ_GEM_PHYMNTNC_OP_MASK 0x40020000 /* operation mask bits */
45 #define ZYNQ_GEM_PHYMNTNC_OP_R_MASK 0x20000000 /* read operation */
46 #define ZYNQ_GEM_PHYMNTNC_OP_W_MASK 0x10000000 /* write operation */
47 #define ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK 23 /* Shift bits for PHYAD */
48 #define ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK 18 /* Shift bits for PHREG */
50 #define ZYNQ_GEM_RXBUF_EOF_MASK 0x00008000 /* End of frame. */
51 #define ZYNQ_GEM_RXBUF_SOF_MASK 0x00004000 /* Start of frame. */
52 #define ZYNQ_GEM_RXBUF_LEN_MASK 0x00003FFF /* Mask for length field */
54 #define ZYNQ_GEM_RXBUF_WRAP_MASK 0x00000002 /* Wrap bit, last BD */
55 #define ZYNQ_GEM_RXBUF_NEW_MASK 0x00000001 /* Used bit.. */
56 #define ZYNQ_GEM_RXBUF_ADD_MASK 0xFFFFFFFC /* Mask for address */
58 /* Wrap bit, last descriptor */
59 #define ZYNQ_GEM_TXBUF_WRAP_MASK 0x40000000
60 #define ZYNQ_GEM_TXBUF_LAST_MASK 0x00008000 /* Last buffer */
62 #define ZYNQ_GEM_TXSR_HRESPNOK_MASK 0x00000100 /* Transmit hresp not OK */
63 #define ZYNQ_GEM_TXSR_URUN_MASK 0x00000040 /* Transmit underrun */
64 /* Transmit buffs exhausted mid frame */
65 #define ZYNQ_GEM_TXSR_BUFEXH_MASK 0x00000010
67 #define ZYNQ_GEM_NWCTRL_TXEN_MASK 0x00000008 /* Enable transmit */
68 #define ZYNQ_GEM_NWCTRL_RXEN_MASK 0x00000004 /* Enable receive */
69 #define ZYNQ_GEM_NWCTRL_MDEN_MASK 0x00000010 /* Enable MDIO port */
70 #define ZYNQ_GEM_NWCTRL_STARTTX_MASK 0x00000200 /* Start tx (tx_go) */
72 #define ZYNQ_GEM_NWCFG_SPEED100 0x000000001 /* 100 Mbps operation */
73 #define ZYNQ_GEM_NWCFG_SPEED1000 0x000000400 /* 1Gbps operation */
74 #define ZYNQ_GEM_NWCFG_FDEN 0x000000002 /* Full Duplex mode */
75 #define ZYNQ_GEM_NWCFG_FSREM 0x000020000 /* FCS removal */
76 #define ZYNQ_GEM_NWCFG_MDCCLKDIV 0x000080000 /* Div pclk by 32, 80MHz */
77 #define ZYNQ_GEM_NWCFG_MDCCLKDIV2 0x0000c0000 /* Div pclk by 48, 120MHz */
79 #define ZYNQ_GEM_NWCFG_INIT (ZYNQ_GEM_NWCFG_FDEN | \
80 ZYNQ_GEM_NWCFG_FSREM | \
81 ZYNQ_GEM_NWCFG_MDCCLKDIV)
83 #define ZYNQ_GEM_NWSR_MDIOIDLE_MASK 0x00000004 /* PHY management idle */
85 #define ZYNQ_GEM_DMACR_BLENGTH 0x00000004 /* INCR4 AHB bursts */
86 /* Use full configured addressable space (8 Kb) */
87 #define ZYNQ_GEM_DMACR_RXSIZE 0x00000300
88 /* Use full configured addressable space (4 Kb) */
89 #define ZYNQ_GEM_DMACR_TXSIZE 0x00000400
90 /* Set with binary 00011000 to use 1536 byte(1*max length frame/buffer) */
91 #define ZYNQ_GEM_DMACR_RXBUF 0x00180000
93 #define ZYNQ_GEM_DMACR_INIT (ZYNQ_GEM_DMACR_BLENGTH | \
94 ZYNQ_GEM_DMACR_RXSIZE | \
95 ZYNQ_GEM_DMACR_TXSIZE | \
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 */
132 /* Initialized, rxbd_current, rx_first_buf must be 0 after init */
133 struct zynq_gem_priv {
134 struct emac_bd tx_bd;
135 struct emac_bd rx_bd[RX_BUF];
136 char rxbuffers[RX_BUF * PKTSIZE_ALIGN];
142 struct phy_device *phydev;
146 static inline int mdio_wait(struct eth_device *dev)
148 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
151 /* Wait till MDIO interface is ready to accept a new transaction. */
153 if (readl(®s->nwsr) & ZYNQ_GEM_NWSR_MDIOIDLE_MASK)
159 printf("%s: Timeout\n", __func__);
166 static u32 phy_setup_op(struct eth_device *dev, u32 phy_addr, u32 regnum,
170 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
175 /* Construct mgtcr mask for the operation */
176 mgtcr = ZYNQ_GEM_PHYMNTNC_OP_MASK | op |
177 (phy_addr << ZYNQ_GEM_PHYMNTNC_PHYAD_SHIFT_MASK) |
178 (regnum << ZYNQ_GEM_PHYMNTNC_PHREG_SHIFT_MASK) | *data;
180 /* Write mgtcr and wait for completion */
181 writel(mgtcr, ®s->phymntnc);
186 if (op == ZYNQ_GEM_PHYMNTNC_OP_R_MASK)
187 *data = readl(®s->phymntnc);
192 static u32 phyread(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 *val)
194 return phy_setup_op(dev, phy_addr, regnum,
195 ZYNQ_GEM_PHYMNTNC_OP_R_MASK, val);
198 static u32 phywrite(struct eth_device *dev, u32 phy_addr, u32 regnum, u16 data)
200 return phy_setup_op(dev, phy_addr, regnum,
201 ZYNQ_GEM_PHYMNTNC_OP_W_MASK, &data);
204 static int zynq_gem_setup_mac(struct eth_device *dev)
206 u32 i, macaddrlow, macaddrhigh;
207 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
209 /* Set the MAC bits [31:0] in BOT */
210 macaddrlow = dev->enetaddr[0];
211 macaddrlow |= dev->enetaddr[1] << 8;
212 macaddrlow |= dev->enetaddr[2] << 16;
213 macaddrlow |= dev->enetaddr[3] << 24;
215 /* Set MAC bits [47:32] in TOP */
216 macaddrhigh = dev->enetaddr[4];
217 macaddrhigh |= dev->enetaddr[5] << 8;
219 for (i = 0; i < 4; i++) {
220 writel(0, ®s->laddr[i][LADDR_LOW]);
221 writel(0, ®s->laddr[i][LADDR_HIGH]);
222 /* Do not use MATCHx register */
223 writel(0, ®s->match[i]);
226 writel(macaddrlow, ®s->laddr[0][LADDR_LOW]);
227 writel(macaddrhigh, ®s->laddr[0][LADDR_HIGH]);
232 static int zynq_gem_init(struct eth_device *dev, bd_t * bis)
234 u32 i, rclk, clk = 0;
235 struct phy_device *phydev;
236 const u32 stat_size = (sizeof(struct zynq_gem_regs) -
237 offsetof(struct zynq_gem_regs, stat)) / 4;
238 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
239 struct zynq_gem_priv *priv = dev->priv;
240 const u32 supported = SUPPORTED_10baseT_Half |
241 SUPPORTED_10baseT_Full |
242 SUPPORTED_100baseT_Half |
243 SUPPORTED_100baseT_Full |
244 SUPPORTED_1000baseT_Half |
245 SUPPORTED_1000baseT_Full;
248 /* Disable all interrupts */
249 writel(0xFFFFFFFF, ®s->idr);
251 /* Disable the receiver & transmitter */
252 writel(0, ®s->nwctrl);
253 writel(0, ®s->txsr);
254 writel(0, ®s->rxsr);
255 writel(0, ®s->phymntnc);
257 /* Clear the Hash registers for the mac address
258 * pointed by AddressPtr
260 writel(0x0, ®s->hashl);
261 /* Write bits [63:32] in TOP */
262 writel(0x0, ®s->hashh);
264 /* Clear all counters */
265 for (i = 0; i <= stat_size; i++)
266 readl(®s->stat[i]);
268 /* Setup RxBD space */
269 memset(&(priv->rx_bd), 0, sizeof(priv->rx_bd));
270 /* Create the RxBD ring */
271 memset(&(priv->rxbuffers), 0, sizeof(priv->rxbuffers));
273 for (i = 0; i < RX_BUF; i++) {
274 priv->rx_bd[i].status = 0xF0000000;
275 priv->rx_bd[i].addr =
276 (u32)((char *)&(priv->rxbuffers) +
277 (i * PKTSIZE_ALIGN));
279 /* WRAP bit to last BD */
280 priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK;
281 /* Write RxBDs to IP */
282 writel((u32)&(priv->rx_bd), ®s->rxqbase);
284 /* Setup for DMA Configuration register */
285 writel(ZYNQ_GEM_DMACR_INIT, ®s->dmacr);
287 /* Setup for Network Control register, MDIO, Rx and Tx enable */
288 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_MDEN_MASK);
293 /* interface - look at tsec */
294 phydev = phy_connect(priv->bus, priv->phyaddr, dev, 0);
296 phydev->supported = supported | ADVERTISED_Pause |
297 ADVERTISED_Asym_Pause;
298 phydev->advertising = phydev->supported;
299 priv->phydev = phydev;
303 switch (phydev->speed) {
305 writel(ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED1000,
307 rclk = (0 << 4) | (1 << 0);
308 clk = (1 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
311 clrsetbits_le32(®s->nwcfg, ZYNQ_GEM_NWCFG_SPEED1000,
312 ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED100);
314 clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
319 clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0);
323 /* Change the rclk and clk only not using EMIO interface */
325 zynq_slcr_gem_clk_setup(dev->iobase !=
326 ZYNQ_GEM_BASEADDR0, rclk, clk);
328 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK |
329 ZYNQ_GEM_NWCTRL_TXEN_MASK);
334 static int zynq_gem_send(struct eth_device *dev, void *ptr, int len)
337 struct zynq_gem_priv *priv = dev->priv;
338 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
339 const u32 mask = ZYNQ_GEM_TXSR_HRESPNOK_MASK | \
340 ZYNQ_GEM_TXSR_URUN_MASK | ZYNQ_GEM_TXSR_BUFEXH_MASK;
343 writel((u32)&(priv->tx_bd), ®s->txqbase);
346 memset((void *)&(priv->tx_bd), 0, sizeof(struct emac_bd));
348 priv->tx_bd.addr = (u32)ptr;
349 priv->tx_bd.status = len | ZYNQ_GEM_TXBUF_LAST_MASK;
352 setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK);
354 /* Read the stat register to know if the packet has been transmitted */
355 status = readl(®s->txsr);
357 printf("Something has gone wrong here!? Status is 0x%x.\n",
360 /* Clear Tx status register before leaving . */
361 writel(status, ®s->txsr);
365 /* Do not check frame_recd flag in rx_status register 0x20 - just poll BD */
366 static int zynq_gem_recv(struct eth_device *dev)
369 struct zynq_gem_priv *priv = dev->priv;
370 struct emac_bd *current_bd = &priv->rx_bd[priv->rxbd_current];
371 struct emac_bd *first_bd;
373 if (!(current_bd->addr & ZYNQ_GEM_RXBUF_NEW_MASK))
376 if (!(current_bd->status &
377 (ZYNQ_GEM_RXBUF_SOF_MASK | ZYNQ_GEM_RXBUF_EOF_MASK))) {
378 printf("GEM: SOF or EOF not set for last buffer received!\n");
382 frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK;
384 NetReceive((u8 *) (current_bd->addr &
385 ZYNQ_GEM_RXBUF_ADD_MASK), frame_len);
387 if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK)
388 priv->rx_first_buf = priv->rxbd_current;
390 current_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
391 current_bd->status = 0xF0000000; /* FIXME */
394 if (current_bd->status & ZYNQ_GEM_RXBUF_EOF_MASK) {
395 first_bd = &priv->rx_bd[priv->rx_first_buf];
396 first_bd->addr &= ~ZYNQ_GEM_RXBUF_NEW_MASK;
397 first_bd->status = 0xF0000000;
400 if ((++priv->rxbd_current) >= RX_BUF)
401 priv->rxbd_current = 0;
407 static void zynq_gem_halt(struct eth_device *dev)
409 struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase;
411 clrsetbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK |
412 ZYNQ_GEM_NWCTRL_TXEN_MASK, 0);
415 static int zynq_gem_miiphyread(const char *devname, uchar addr,
416 uchar reg, ushort *val)
418 struct eth_device *dev = eth_get_dev();
421 ret = phyread(dev, addr, reg, val);
422 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, *val);
426 static int zynq_gem_miiphy_write(const char *devname, uchar addr,
427 uchar reg, ushort val)
429 struct eth_device *dev = eth_get_dev();
431 debug("%s 0x%x, 0x%x, 0x%x\n", __func__, addr, reg, val);
432 return phywrite(dev, addr, reg, val);
435 int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr, u32 emio)
437 struct eth_device *dev;
438 struct zynq_gem_priv *priv;
440 dev = calloc(1, sizeof(*dev));
444 dev->priv = calloc(1, sizeof(struct zynq_gem_priv));
445 if (dev->priv == NULL) {
451 priv->phyaddr = phy_addr;
454 sprintf(dev->name, "Gem.%x", base_addr);
456 dev->iobase = base_addr;
458 dev->init = zynq_gem_init;
459 dev->halt = zynq_gem_halt;
460 dev->send = zynq_gem_send;
461 dev->recv = zynq_gem_recv;
462 dev->write_hwaddr = zynq_gem_setup_mac;
466 miiphy_register(dev->name, zynq_gem_miiphyread, zynq_gem_miiphy_write);
467 priv->bus = miiphy_get_dev_by_name(dev->name);