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1 /*
2  * (C) Copyright 2009
3  * Marvell Semiconductor <www.marvell.com>
4  * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
5  *
6  * (C) Copyright 2003
7  * Ingo Assmus <ingo.assmus@keymile.com>
8  *
9  * based on - Driver for MV64360X ethernet ports
10  * Copyright (C) 2002 rabeeh@galileo.co.il
11  *
12  * See file CREDITS for list of people who contributed to this
13  * project.
14  *
15  * This program is free software; you can redistribute it and/or
16  * modify it under the terms of the GNU General Public License as
17  * published by the Free Software Foundation; either version 2 of
18  * the License, or (at your option) any later version.
19  *
20  * This program is distributed in the hope that it will be useful,
21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23  * GNU General Public License for more details.
24  *
25  * You should have received a copy of the GNU General Public License
26  * along with this program; if not, write to the Free Software
27  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
28  * MA 02110-1301 USA
29  */
30
31 #include <common.h>
32 #include <net.h>
33 #include <malloc.h>
34 #include <miiphy.h>
35 #include <asm/errno.h>
36 #include <asm/types.h>
37 #include <asm/byteorder.h>
38 #include <asm/arch/kirkwood.h>
39 #include "kirkwood_egiga.h"
40
41 #define KIRKWOOD_PHY_ADR_REQUEST 0xee
42 #define KWGBE_SMI_REG (((struct kwgbe_registers *)KW_EGIGA0_BASE)->smi)
43
44 /*
45  * smi_reg_read - miiphy_read callback function.
46  *
47  * Returns 16bit phy register value, or 0xffff on error
48  */
49 static int smi_reg_read(char *devname, u8 phy_adr, u8 reg_ofs, u16 * data)
50 {
51         struct eth_device *dev = eth_get_dev_by_name(devname);
52         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
53         struct kwgbe_registers *regs = dkwgbe->regs;
54         u32 smi_reg;
55         u32 timeout;
56
57         /* Phyadr read request */
58         if (phy_adr == KIRKWOOD_PHY_ADR_REQUEST &&
59                         reg_ofs == KIRKWOOD_PHY_ADR_REQUEST) {
60                 /* */
61                 *data = (u16) (KWGBEREG_RD(regs->phyadr) & PHYADR_MASK);
62                 return 0;
63         }
64         /* check parameters */
65         if (phy_adr > PHYADR_MASK) {
66                 printf("Err..(%s) Invalid PHY address %d\n",
67                         __FUNCTION__, phy_adr);
68                 return -EFAULT;
69         }
70         if (reg_ofs > PHYREG_MASK) {
71                 printf("Err..(%s) Invalid register offset %d\n",
72                         __FUNCTION__, reg_ofs);
73                 return -EFAULT;
74         }
75
76         timeout = KWGBE_PHY_SMI_TIMEOUT;
77         /* wait till the SMI is not busy */
78         do {
79                 /* read smi register */
80                 smi_reg = KWGBEREG_RD(KWGBE_SMI_REG);
81                 if (timeout-- == 0) {
82                         printf("Err..(%s) SMI busy timeout\n", __FUNCTION__);
83                         return -EFAULT;
84                 }
85         } while (smi_reg & KWGBE_PHY_SMI_BUSY_MASK);
86
87         /* fill the phy address and regiser offset and read opcode */
88         smi_reg = (phy_adr << KWGBE_PHY_SMI_DEV_ADDR_OFFS)
89                 | (reg_ofs << KWGBE_SMI_REG_ADDR_OFFS)
90                 | KWGBE_PHY_SMI_OPCODE_READ;
91
92         /* write the smi register */
93         KWGBEREG_WR(KWGBE_SMI_REG, smi_reg);
94
95         /*wait till read value is ready */
96         timeout = KWGBE_PHY_SMI_TIMEOUT;
97
98         do {
99                 /* read smi register */
100                 smi_reg = KWGBEREG_RD(KWGBE_SMI_REG);
101                 if (timeout-- == 0) {
102                         printf("Err..(%s) SMI read ready timeout\n",
103                                 __FUNCTION__);
104                         return -EFAULT;
105                 }
106         } while (!(smi_reg & KWGBE_PHY_SMI_READ_VALID_MASK));
107
108         /* Wait for the data to update in the SMI register */
109         for (timeout = 0; timeout < KWGBE_PHY_SMI_TIMEOUT; timeout++) ;
110
111         *data = (u16) (KWGBEREG_RD(KWGBE_SMI_REG) & KWGBE_PHY_SMI_DATA_MASK);
112
113         debug("%s:(adr %d, off %d) value= %04x\n", __FUNCTION__, phy_adr,
114                 reg_ofs, *data);
115
116         return 0;
117 }
118
119 /*
120  * smi_reg_write - imiiphy_write callback function.
121  *
122  * Returns 0 if write succeed, -EINVAL on bad parameters
123  * -ETIME on timeout
124  */
125 static int smi_reg_write(char *devname, u8 phy_adr, u8 reg_ofs, u16 data)
126 {
127         struct eth_device *dev = eth_get_dev_by_name(devname);
128         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
129         struct kwgbe_registers *regs = dkwgbe->regs;
130         u32 smi_reg;
131         u32 timeout;
132
133         /* Phyadr write request*/
134         if (phy_adr == KIRKWOOD_PHY_ADR_REQUEST &&
135                         reg_ofs == KIRKWOOD_PHY_ADR_REQUEST) {
136                 KWGBEREG_WR(regs->phyadr, data);
137                 return 0;
138         }
139
140         /* check parameters */
141         if (phy_adr > PHYADR_MASK) {
142                 printf("Err..(%s) Invalid phy address\n", __FUNCTION__);
143                 return -EINVAL;
144         }
145         if (reg_ofs > PHYREG_MASK) {
146                 printf("Err..(%s) Invalid register offset\n", __FUNCTION__);
147                 return -EINVAL;
148         }
149
150         /* wait till the SMI is not busy */
151         timeout = KWGBE_PHY_SMI_TIMEOUT;
152         do {
153                 /* read smi register */
154                 smi_reg = KWGBEREG_RD(KWGBE_SMI_REG);
155                 if (timeout-- == 0) {
156                         printf("Err..(%s) SMI busy timeout\n", __FUNCTION__);
157                         return -ETIME;
158                 }
159         } while (smi_reg & KWGBE_PHY_SMI_BUSY_MASK);
160
161         /* fill the phy addr and reg offset and write opcode and data */
162         smi_reg = (data << KWGBE_PHY_SMI_DATA_OFFS);
163         smi_reg |= (phy_adr << KWGBE_PHY_SMI_DEV_ADDR_OFFS)
164                 | (reg_ofs << KWGBE_SMI_REG_ADDR_OFFS);
165         smi_reg &= ~KWGBE_PHY_SMI_OPCODE_READ;
166
167         /* write the smi register */
168         KWGBEREG_WR(KWGBE_SMI_REG, smi_reg);
169
170         return 0;
171 }
172
173 /* Stop and checks all queues */
174 static void stop_queue(u32 * qreg)
175 {
176         u32 reg_data;
177
178         reg_data = readl(qreg);
179
180         if (reg_data & 0xFF) {
181                 /* Issue stop command for active channels only */
182                 writel((reg_data << 8), qreg);
183
184                 /* Wait for all queue activity to terminate. */
185                 do {
186                         /*
187                          * Check port cause register that all queues
188                          * are stopped
189                          */
190                         reg_data = readl(qreg);
191                 }
192                 while (reg_data & 0xFF);
193         }
194 }
195
196 /*
197  * set_access_control - Config address decode parameters for Ethernet unit
198  *
199  * This function configures the address decode parameters for the Gigabit
200  * Ethernet Controller according the given parameters struct.
201  *
202  * @regs        Register struct pointer.
203  * @param       Address decode parameter struct.
204  */
205 static void set_access_control(struct kwgbe_registers *regs,
206                                 struct kwgbe_winparam *param)
207 {
208         u32 access_prot_reg;
209
210         /* Set access control register */
211         access_prot_reg = KWGBEREG_RD(regs->epap);
212         /* clear window permission */
213         access_prot_reg &= (~(3 << (param->win * 2)));
214         access_prot_reg |= (param->access_ctrl << (param->win * 2));
215         KWGBEREG_WR(regs->epap, access_prot_reg);
216
217         /* Set window Size reg (SR) */
218         KWGBEREG_WR(regs->barsz[param->win].size,
219                         (((param->size / 0x10000) - 1) << 16));
220
221         /* Set window Base address reg (BA) */
222         KWGBEREG_WR(regs->barsz[param->win].bar,
223                         (param->target | param->attrib | param->base_addr));
224         /* High address remap reg (HARR) */
225         if (param->win < 4)
226                 KWGBEREG_WR(regs->ha_remap[param->win], param->high_addr);
227
228         /* Base address enable reg (BARER) */
229         if (param->enable == 1)
230                 KWGBEREG_BITS_RESET(regs->bare, (1 << param->win));
231         else
232                 KWGBEREG_BITS_SET(regs->bare, (1 << param->win));
233 }
234
235 static void set_dram_access(struct kwgbe_registers *regs)
236 {
237         struct kwgbe_winparam win_param;
238         int i;
239
240         for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
241                 /* Set access parameters for DRAM bank i */
242                 win_param.win = i;      /* Use Ethernet window i */
243                 /* Window target - DDR */
244                 win_param.target = KWGBE_TARGET_DRAM;
245                 /* Enable full access */
246                 win_param.access_ctrl = EWIN_ACCESS_FULL;
247                 win_param.high_addr = 0;
248                 /* Get bank base */
249                 win_param.base_addr = kw_sdram_bar(i);
250                 win_param.size = kw_sdram_bs(i);        /* Get bank size */
251                 if (win_param.size == 0)
252                         win_param.enable = 0;
253                 else
254                         win_param.enable = 1;   /* Enable the access */
255
256                 /* Enable DRAM bank */
257                 switch (i) {
258                 case 0:
259                         win_param.attrib = EBAR_DRAM_CS0;
260                         break;
261                 case 1:
262                         win_param.attrib = EBAR_DRAM_CS1;
263                         break;
264                 case 2:
265                         win_param.attrib = EBAR_DRAM_CS2;
266                         break;
267                 case 3:
268                         win_param.attrib = EBAR_DRAM_CS3;
269                         break;
270                 default:
271                         /* invalide bank, disable access */
272                         win_param.enable = 0;
273                         win_param.attrib = 0;
274                         break;
275                 }
276                 /* Set the access control for address window(EPAPR) RD/WR */
277                 set_access_control(regs, &win_param);
278         }
279 }
280
281 /*
282  * port_init_mac_tables - Clear all entrance in the UC, SMC and OMC tables
283  *
284  * Go through all the DA filter tables (Unicast, Special Multicast & Other
285  * Multicast) and set each entry to 0.
286  */
287 static void port_init_mac_tables(struct kwgbe_registers *regs)
288 {
289         int table_index;
290
291         /* Clear DA filter unicast table (Ex_dFUT) */
292         for (table_index = 0; table_index < 4; ++table_index)
293                 KWGBEREG_WR(regs->dfut[table_index], 0);
294
295         for (table_index = 0; table_index < 64; ++table_index) {
296                 /* Clear DA filter special multicast table (Ex_dFSMT) */
297                 KWGBEREG_WR(regs->dfsmt[table_index], 0);
298                 /* Clear DA filter other multicast table (Ex_dFOMT) */
299                 KWGBEREG_WR(regs->dfomt[table_index], 0);
300         }
301 }
302
303 /*
304  * port_uc_addr - This function Set the port unicast address table
305  *
306  * This function locates the proper entry in the Unicast table for the
307  * specified MAC nibble and sets its properties according to function
308  * parameters.
309  * This function add/removes MAC addresses from the port unicast address
310  * table.
311  *
312  * @uc_nibble   Unicast MAC Address last nibble.
313  * @option      0 = Add, 1 = remove address.
314  *
315  * RETURN: 1 if output succeeded. 0 if option parameter is invalid.
316  */
317 static int port_uc_addr(struct kwgbe_registers *regs, u8 uc_nibble,
318                         int option)
319 {
320         u32 unicast_reg;
321         u32 tbl_offset;
322         u32 reg_offset;
323
324         /* Locate the Unicast table entry */
325         uc_nibble = (0xf & uc_nibble);
326         /* Register offset from unicast table base */
327         tbl_offset = (uc_nibble / 4);
328         /* Entry offset within the above register */
329         reg_offset = uc_nibble % 4;
330
331         switch (option) {
332         case REJECT_MAC_ADDR:
333                 /*
334                  * Clear accepts frame bit at specified unicast
335                  * DA table entry
336                  */
337                 unicast_reg = KWGBEREG_RD(regs->dfut[tbl_offset]);
338                 unicast_reg &= (0xFF << (8 * reg_offset));
339                 KWGBEREG_WR(regs->dfut[tbl_offset], unicast_reg);
340                 break;
341         case ACCEPT_MAC_ADDR:
342                 /* Set accepts frame bit at unicast DA filter table entry */
343                 unicast_reg = KWGBEREG_RD(regs->dfut[tbl_offset]);
344                 unicast_reg &= (0xFF << (8 * reg_offset));
345                 unicast_reg |= ((0x01 | (RXUQ << 1)) << (8 * reg_offset));
346                 KWGBEREG_WR(regs->dfut[tbl_offset], unicast_reg);
347                 break;
348         default:
349                 return 0;
350         }
351         return 1;
352 }
353
354 /*
355  * port_uc_addr_set - This function Set the port Unicast address.
356  */
357 static void port_uc_addr_set(struct kwgbe_registers *regs, u8 * p_addr)
358 {
359         u32 mac_h;
360         u32 mac_l;
361
362         mac_l = (p_addr[4] << 8) | (p_addr[5]);
363         mac_h = (p_addr[0] << 24) | (p_addr[1] << 16) | (p_addr[2] << 8) |
364                 (p_addr[3] << 0);
365
366         KWGBEREG_WR(regs->macal, mac_l);
367         KWGBEREG_WR(regs->macah, mac_h);
368
369         /* Accept frames of this address */
370         port_uc_addr(regs, p_addr[5], ACCEPT_MAC_ADDR);
371 }
372
373 /*
374  * kwgbe_init_rx_desc_ring - Curve a Rx chain desc list and buffer in memory.
375  */
376 static void kwgbe_init_rx_desc_ring(struct kwgbe_device *dkwgbe)
377 {
378         struct kwgbe_rxdesc *p_rx_desc;
379         int i;
380
381         /* initialize the Rx descriptors ring */
382         p_rx_desc = dkwgbe->p_rxdesc;
383         for (i = 0; i < RINGSZ; i++) {
384                 p_rx_desc->cmd_sts =
385                         KWGBE_BUFFER_OWNED_BY_DMA | KWGBE_RX_EN_INTERRUPT;
386                 p_rx_desc->buf_size = PKTSIZE_ALIGN;
387                 p_rx_desc->byte_cnt = 0;
388                 p_rx_desc->buf_ptr = dkwgbe->p_rxbuf + i * PKTSIZE_ALIGN;
389                 if (i == (RINGSZ - 1))
390                         p_rx_desc->nxtdesc_p = dkwgbe->p_rxdesc;
391                 else {
392                         p_rx_desc->nxtdesc_p = (struct kwgbe_rxdesc *)
393                                 ((u32) p_rx_desc + KW_RXQ_DESC_ALIGNED_SIZE);
394                         p_rx_desc = p_rx_desc->nxtdesc_p;
395                 }
396         }
397         dkwgbe->p_rxdesc_curr = dkwgbe->p_rxdesc;
398 }
399
400 static int kwgbe_init(struct eth_device *dev)
401 {
402         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
403         struct kwgbe_registers *regs = dkwgbe->regs;
404 #if (defined (CONFIG_MII) || defined (CONFIG_CMD_MII)) \
405          && defined (CONFIG_SYS_FAULT_ECHO_LINK_DOWN)
406         int i;
407 #endif
408         /* setup RX rings */
409         kwgbe_init_rx_desc_ring(dkwgbe);
410
411         /* Clear the ethernet port interrupts */
412         KWGBEREG_WR(regs->ic, 0);
413         KWGBEREG_WR(regs->ice, 0);
414         /* Unmask RX buffer and TX end interrupt */
415         KWGBEREG_WR(regs->pim, INT_CAUSE_UNMASK_ALL);
416         /* Unmask phy and link status changes interrupts */
417         KWGBEREG_WR(regs->peim, INT_CAUSE_UNMASK_ALL_EXT);
418
419         set_dram_access(regs);
420         port_init_mac_tables(regs);
421         port_uc_addr_set(regs, dkwgbe->dev.enetaddr);
422
423         /* Assign port configuration and command. */
424         KWGBEREG_WR(regs->pxc, PRT_CFG_VAL);
425         KWGBEREG_WR(regs->pxcx, PORT_CFG_EXTEND_VALUE);
426         KWGBEREG_WR(regs->psc0, PORT_SERIAL_CONTROL_VALUE);
427         /* Disable port initially */
428         KWGBEREG_BITS_SET(regs->psc0, KWGBE_SERIAL_PORT_EN);
429
430         /* Assign port SDMA configuration */
431         KWGBEREG_WR(regs->sdc, PORT_SDMA_CFG_VALUE);
432         KWGBEREG_WR(regs->tqx[0].qxttbc, QTKNBKT_DEF_VAL);
433         KWGBEREG_WR(regs->tqx[0].tqxtbc, (QMTBS_DEF_VAL << 16) | QTKNRT_DEF_VAL);
434         /* Turn off the port/RXUQ bandwidth limitation */
435         KWGBEREG_WR(regs->pmtu, 0);
436
437         /* Set maximum receive buffer to 9700 bytes */
438         KWGBEREG_WR(regs->psc0, KWGBE_MAX_RX_PACKET_9700BYTE
439                         | (KWGBEREG_RD(regs->psc0) & MRU_MASK));
440
441         /*
442          * Set ethernet MTU for leaky bucket mechanism to 0 - this will
443          * disable the leaky bucket mechanism .
444          */
445         KWGBEREG_WR(regs->pmtu, 0);
446
447         /* Assignment of Rx CRDB of given RXUQ */
448         KWGBEREG_WR(regs->rxcdp[RXUQ].rxcdp, (u32) dkwgbe->p_rxdesc_curr);
449         /* Enable port Rx. */
450         KWGBEREG_WR(regs->rqc, (1 << RXUQ));
451
452 #if (defined (CONFIG_MII) || defined (CONFIG_CMD_MII)) \
453          && defined (CONFIG_SYS_FAULT_ECHO_LINK_DOWN)
454         /* Wait up to 5s for the link status */
455         for (i = 0; i < 5; i++) {
456                 u16 phyadr;
457
458                 miiphy_read(dev->name, KIRKWOOD_PHY_ADR_REQUEST,
459                                 KIRKWOOD_PHY_ADR_REQUEST, &phyadr);
460                 /* Return if we get link up */
461                 if (miiphy_link(dev->name, phyadr))
462                         return 0;
463                 udelay(1000000);
464         }
465
466         printf("No link on %s\n", dev->name);
467         return -1;
468 #endif
469         return 0;
470 }
471
472 static int kwgbe_halt(struct eth_device *dev)
473 {
474         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
475         struct kwgbe_registers *regs = dkwgbe->regs;
476
477         /* Disable all gigE address decoder */
478         KWGBEREG_WR(regs->bare, 0x3f);
479
480         stop_queue(&regs->tqc);
481         stop_queue(&regs->rqc);
482
483         /* Enable port */
484         KWGBEREG_BITS_RESET(regs->psc0, KWGBE_SERIAL_PORT_EN);
485         /* Set port is not reset */
486         KWGBEREG_BITS_RESET(regs->psc1, 1 << 4);
487 #ifdef CONFIG_SYS_MII_MODE
488         /* Set MMI interface up */
489         KWGBEREG_BITS_RESET(regs->psc1, 1 << 3);
490 #endif
491         /* Disable & mask ethernet port interrupts */
492         KWGBEREG_WR(regs->ic, 0);
493         KWGBEREG_WR(regs->ice, 0);
494         KWGBEREG_WR(regs->pim, 0);
495         KWGBEREG_WR(regs->peim, 0);
496
497         return 0;
498 }
499
500 static int kwgbe_send(struct eth_device *dev, volatile void *dataptr,
501                       int datasize)
502 {
503         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
504         struct kwgbe_registers *regs = dkwgbe->regs;
505         struct kwgbe_txdesc *p_txdesc = dkwgbe->p_txdesc;
506         void *p = (void *)dataptr;
507         u32 cmd_sts;
508
509         /* Copy buffer if it's misaligned */
510         if ((u32) dataptr & 0x07) {
511                 if (datasize > PKTSIZE_ALIGN) {
512                         printf("Non-aligned data too large (%d)\n",
513                                         datasize);
514                         return -1;
515                 }
516
517                 memcpy(dkwgbe->p_aligned_txbuf, p, datasize);
518                 p = dkwgbe->p_aligned_txbuf;
519         }
520
521         p_txdesc->cmd_sts = KWGBE_ZERO_PADDING | KWGBE_GEN_CRC;
522         p_txdesc->cmd_sts |= KWGBE_TX_FIRST_DESC | KWGBE_TX_LAST_DESC;
523         p_txdesc->cmd_sts |= KWGBE_BUFFER_OWNED_BY_DMA;
524         p_txdesc->cmd_sts |= KWGBE_TX_EN_INTERRUPT;
525         p_txdesc->buf_ptr = (u8 *) p;
526         p_txdesc->byte_cnt = datasize;
527
528         /* Apply send command using zeroth RXUQ */
529         KWGBEREG_WR(regs->tcqdp[TXUQ], (u32) p_txdesc);
530         KWGBEREG_WR(regs->tqc, (1 << TXUQ));
531
532         /*
533          * wait for packet xmit completion
534          */
535         cmd_sts = readl(&p_txdesc->cmd_sts);
536         while (cmd_sts & KWGBE_BUFFER_OWNED_BY_DMA) {
537                 /* return fail if error is detected */
538                 if ((cmd_sts & (KWGBE_ERROR_SUMMARY | KWGBE_TX_LAST_FRAME)) ==
539                                 (KWGBE_ERROR_SUMMARY | KWGBE_TX_LAST_FRAME) &&
540                                 cmd_sts & (KWGBE_UR_ERROR | KWGBE_RL_ERROR)) {
541                         printf("Err..(%s) in xmit packet\n", __FUNCTION__);
542                         return -1;
543                 }
544                 cmd_sts = readl(&p_txdesc->cmd_sts);
545         };
546         return 0;
547 }
548
549 static int kwgbe_recv(struct eth_device *dev)
550 {
551         struct kwgbe_device *dkwgbe = to_dkwgbe(dev);
552         struct kwgbe_rxdesc *p_rxdesc_curr = dkwgbe->p_rxdesc_curr;
553         u32 cmd_sts;
554         u32 timeout = 0;
555
556         /* wait untill rx packet available or timeout */
557         do {
558                 if (timeout < KWGBE_PHY_SMI_TIMEOUT)
559                         timeout++;
560                 else {
561                         debug("%s time out...\n", __FUNCTION__);
562                         return -1;
563                 }
564         } while (readl(&p_rxdesc_curr->cmd_sts) & KWGBE_BUFFER_OWNED_BY_DMA);
565
566         if (p_rxdesc_curr->byte_cnt != 0) {
567                 debug("%s: Received %d byte Packet @ 0x%x (cmd_sts= %08x)\n",
568                         __FUNCTION__, (u32) p_rxdesc_curr->byte_cnt,
569                         (u32) p_rxdesc_curr->buf_ptr,
570                         (u32) p_rxdesc_curr->cmd_sts);
571         }
572
573         /*
574          * In case received a packet without first/last bits on
575          * OR the error summary bit is on,
576          * the packets needs to be dropeed.
577          */
578         cmd_sts = readl(&p_rxdesc_curr->cmd_sts);
579
580         if ((cmd_sts &
581                 (KWGBE_RX_FIRST_DESC | KWGBE_RX_LAST_DESC))
582                 != (KWGBE_RX_FIRST_DESC | KWGBE_RX_LAST_DESC)) {
583
584                 printf("Err..(%s) Dropping packet spread on"
585                         " multiple descriptors\n", __FUNCTION__);
586
587         } else if (cmd_sts & KWGBE_ERROR_SUMMARY) {
588
589                 printf("Err..(%s) Dropping packet with errors\n",
590                         __FUNCTION__);
591
592         } else {
593                 /* !!! call higher layer processing */
594                 debug("%s: Sending Received packet to"
595                         " upper layer (NetReceive)\n", __FUNCTION__);
596
597                 /* let the upper layer handle the packet */
598                 NetReceive((p_rxdesc_curr->buf_ptr + RX_BUF_OFFSET),
599                         (int)(p_rxdesc_curr->byte_cnt - RX_BUF_OFFSET));
600         }
601         /*
602          * free these descriptors and point next in the ring
603          */
604         p_rxdesc_curr->cmd_sts =
605                 KWGBE_BUFFER_OWNED_BY_DMA | KWGBE_RX_EN_INTERRUPT;
606         p_rxdesc_curr->buf_size = PKTSIZE_ALIGN;
607         p_rxdesc_curr->byte_cnt = 0;
608
609         writel((unsigned)p_rxdesc_curr->nxtdesc_p, &dkwgbe->p_rxdesc_curr);
610
611         return 0;
612 }
613
614 int kirkwood_egiga_initialize(bd_t * bis)
615 {
616         struct kwgbe_device *dkwgbe;
617         struct eth_device *dev;
618         int devnum;
619         char *s;
620         u8 used_ports[MAX_KWGBE_DEVS] = CONFIG_KIRKWOOD_EGIGA_PORTS;
621
622         for (devnum = 0; devnum < MAX_KWGBE_DEVS; devnum++) {
623                 /*skip if port is configured not to use */
624                 if (used_ports[devnum] == 0)
625                         continue;
626
627                 if (!(dkwgbe = malloc(sizeof(struct kwgbe_device))))
628                         goto error1;
629
630                 memset(dkwgbe, 0, sizeof(struct kwgbe_device));
631
632                 if (!(dkwgbe->p_rxdesc =
633                       (struct kwgbe_rxdesc *)memalign(PKTALIGN,
634                                                 KW_RXQ_DESC_ALIGNED_SIZE
635                                                 * RINGSZ + 1)))
636                         goto error2;
637
638                 if (!(dkwgbe->p_rxbuf = (u8 *) memalign(PKTALIGN, RINGSZ
639                                                         * PKTSIZE_ALIGN + 1)))
640                         goto error3;
641
642                 if (!(dkwgbe->p_aligned_txbuf = memalign(8, PKTSIZE_ALIGN)))
643                         goto error4;
644
645                 if (!(dkwgbe->p_txdesc = (struct kwgbe_txdesc *)
646                       memalign(PKTALIGN, sizeof(struct kwgbe_txdesc) + 1))) {
647                         free(dkwgbe->p_aligned_txbuf);
648                       error4:
649                         free(dkwgbe->p_rxbuf);
650                       error3:
651                         free(dkwgbe->p_rxdesc);
652                       error2:
653                         free(dkwgbe);
654                       error1:
655                         printf("Err.. %s Failed to allocate memory\n",
656                                 __FUNCTION__);
657                         return -1;
658                 }
659
660                 dev = &dkwgbe->dev;
661
662                 /* must be less than NAMESIZE (16) */
663                 sprintf(dev->name, "egiga%d", devnum);
664
665                 /* Extract the MAC address from the environment */
666                 switch (devnum) {
667                 case 0:
668                         dkwgbe->regs = (void *)KW_EGIGA0_BASE;
669                         s = "ethaddr";
670                         break;
671                 case 1:
672                         dkwgbe->regs = (void *)KW_EGIGA1_BASE;
673                         s = "eth1addr";
674                         break;
675                 default:        /* this should never happen */
676                         printf("Err..(%s) Invalid device number %d\n",
677                                 __FUNCTION__, devnum);
678                         return -1;
679                 }
680
681                 while (!eth_getenv_enetaddr(s, dev->enetaddr)) {
682                         /* Generate Random Private MAC addr if not set */
683                         dev->enetaddr[0] = 0x02;
684                         dev->enetaddr[1] = 0x50;
685                         dev->enetaddr[2] = 0x43;
686                         dev->enetaddr[3] = get_random_hex();
687                         dev->enetaddr[4] = get_random_hex();
688                         dev->enetaddr[5] = get_random_hex();
689                         eth_setenv_enetaddr(s, dev->enetaddr);
690                 }
691
692                 dev->init = (void *)kwgbe_init;
693                 dev->halt = (void *)kwgbe_halt;
694                 dev->send = (void *)kwgbe_send;
695                 dev->recv = (void *)kwgbe_recv;
696
697                 eth_register(dev);
698
699 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
700                 miiphy_register(dev->name, smi_reg_read, smi_reg_write);
701                 /* Set phy address of the port */
702                 miiphy_write(dev->name, KIRKWOOD_PHY_ADR_REQUEST,
703                                 KIRKWOOD_PHY_ADR_REQUEST, PHY_BASE_ADR + devnum);
704 #endif
705         }
706         return 0;
707 }