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