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TsiChungLiewf28e1bd2007-08-15 20:32:06 -05001/*
2 * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
3 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <asm/fec.h>
26#include <asm/immap.h>
27
28#include <config.h>
29#include <net.h>
30
31DECLARE_GLOBAL_DATA_PTR;
32
33#if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI)
34#undef MII_DEBUG
35#undef ET_DEBUG
36
37int fecpin_setclear(struct eth_device *dev, int setclear)
38{
39 if (setclear) {
40 MCFGPIO_PASPAR |= 0x0F00;
41 MCFGPIO_PEHLPAR = CFG_PEHLPAR;
42 } else {
43 MCFGPIO_PASPAR &= 0xF0FF;
44 MCFGPIO_PEHLPAR &= ~CFG_PEHLPAR;
45 }
46 return 0;
47}
48
49#if defined(CFG_DISCOVER_PHY) || defined(CONFIG_CMD_MII)
50#include <miiphy.h>
51
52/* Make MII read/write commands for the FEC. */
53#define mk_mii_read(ADDR, REG) (0x60020000 | ((ADDR << 23) | (REG & 0x1f) << 18))
54
55#define mk_mii_write(ADDR, REG, VAL) (0x50020000 | ((ADDR << 23) | (REG & 0x1f) << 18) | (VAL & 0xffff))
56
57/* PHY identification */
58#define PHY_ID_LXT970 0x78100000 /* LXT970 */
59#define PHY_ID_LXT971 0x001378e0 /* LXT971 and 972 */
60#define PHY_ID_82555 0x02a80150 /* Intel 82555 */
61#define PHY_ID_QS6612 0x01814400 /* QS6612 */
62#define PHY_ID_AMD79C784 0x00225610 /* AMD 79C784 */
63#define PHY_ID_AMD79C874VC 0x0022561B /* AMD 79C874 */
64#define PHY_ID_LSI80225 0x0016f870 /* LSI 80225 */
65#define PHY_ID_LSI80225B 0x0016f880 /* LSI 80225/B */
66#define PHY_ID_DP83848VV 0x20005C90 /* National 83848 */
67#define PHY_ID_DP83849 0x20005CA2 /* National 82849 */
68
69#define STR_ID_LXT970 "LXT970"
70#define STR_ID_LXT971 "LXT971"
71#define STR_ID_82555 "Intel82555"
72#define STR_ID_QS6612 "QS6612"
73#define STR_ID_AMD79C784 "AMD79C784"
74#define STR_ID_AMD79C874VC "AMD79C874VC"
75#define STR_ID_LSI80225 "LSI80225"
76#define STR_ID_LSI80225B "LSI80225/B"
77#define STR_ID_DP83848VV "N83848"
78#define STR_ID_DP83849 "N83849"
79
80/****************************************************************************
81 * mii_init -- Initialize the MII for MII command without ethernet
82 * This function is a subset of eth_init
83 ****************************************************************************
84 */
85void mii_reset(struct fec_info_s *info)
86{
87 volatile fec_t *fecp = (fec_t *) (info->miibase);
88 int i;
89
90 fecp->ecr = FEC_ECR_RESET;
91 for (i = 0; (fecp->ecr & FEC_ECR_RESET) && (i < FEC_RESET_DELAY); ++i) {
92 udelay(1);
93 }
94 if (i == FEC_RESET_DELAY) {
95 printf("FEC_RESET_DELAY timeout\n");
96 }
97}
98
99/* send command to phy using mii, wait for result */
100uint mii_send(uint mii_cmd)
101{
102 struct fec_info_s *info;
103 struct eth_device *dev;
104 volatile fec_t *ep;
105 uint mii_reply;
106 int j = 0;
107
108 /* retrieve from register structure */
109 dev = eth_get_dev();
110 info = dev->priv;
111
112 ep = (fec_t *) info->miibase;
113
114 ep->mmfr = mii_cmd; /* command to phy */
115
116 /* wait for mii complete */
117 while (!(ep->eir & FEC_EIR_MII) && (j < MCFFEC_TOUT_LOOP)) {
118 udelay(1);
119 j++;
120 }
121 if (j >= MCFFEC_TOUT_LOOP) {
122 printf("MII not complete\n");
123 return -1;
124 }
125
126 mii_reply = ep->mmfr; /* result from phy */
127 ep->eir = FEC_EIR_MII; /* clear MII complete */
128#ifdef ET_DEBUG
129 printf("%s[%d] %s: sent=0x%8.8x, reply=0x%8.8x\n",
130 __FILE__, __LINE__, __FUNCTION__, mii_cmd, mii_reply);
131#endif
132
133 return (mii_reply & 0xffff); /* data read from phy */
134}
135#endif /* CFG_DISCOVER_PHY || (CONFIG_COMMANDS & CONFIG_CMD_MII) */
136
137#if defined(CFG_DISCOVER_PHY)
138int mii_discover_phy(struct eth_device *dev)
139{
140#define MAX_PHY_PASSES 11
141 struct fec_info_s *info = dev->priv;
142 int phyaddr, pass;
143 uint phyno, phytype;
144
145 if (info->phyname_init)
146 return info->phy_addr;
147
148 phyaddr = -1; /* didn't find a PHY yet */
149 for (pass = 1; pass <= MAX_PHY_PASSES && phyaddr < 0; ++pass) {
150 if (pass > 1) {
151 /* PHY may need more time to recover from reset.
152 * The LXT970 needs 50ms typical, no maximum is
153 * specified, so wait 10ms before try again.
154 * With 11 passes this gives it 100ms to wake up.
155 */
156 udelay(10000); /* wait 10ms */
157 }
158
159 for (phyno = 0; phyno < 32 && phyaddr < 0; ++phyno) {
160
161 phytype = mii_send(mk_mii_read(phyno, PHY_PHYIDR1));
162#ifdef ET_DEBUG
163 printf("PHY type 0x%x pass %d type\n", phytype, pass);
164#endif
165 if (phytype != 0xffff) {
166 phyaddr = phyno;
167 phytype <<= 16;
168 phytype |=
169 mii_send(mk_mii_read(phyno, PHY_PHYIDR2));
170
171 switch (phytype & 0xffffffff) {
172 case PHY_ID_AMD79C874VC:
173 strcpy(info->phy_name,
174 STR_ID_AMD79C874VC);
175 info->phyname_init = 1;
176 break;
177 default:
178 strcpy(info->phy_name, "unknown");
179 info->phyname_init = 1;
180 break;
181 }
182
183#ifdef ET_DEBUG
184 printf("PHY @ 0x%x pass %d type ", phyno, pass);
185 switch (phytype & 0xffffffff) {
186 case PHY_ID_AMD79C874VC:
187 printf(STR_ID_AMD79C874VC);
188 break;
189 default:
190 printf("0x%08x\n", phytype);
191 break;
192 }
193#endif
194 }
195 }
196 }
197 if (phyaddr < 0)
198 printf("No PHY device found.\n");
199
200 return phyaddr;
201}
202#endif /* CFG_DISCOVER_PHY */
203
Liew Tsi Chung-r5aahpdcb88632007-09-13 16:06:05 -0700204void mii_init(void) __attribute__((weak,alias("__mii_init")));
TsiChungLiewf28e1bd2007-08-15 20:32:06 -0500205
206void __mii_init(void)
207{
208 volatile fec_t *fecp;
209 struct fec_info_s *info;
210 struct eth_device *dev;
211 int miispd = 0, i = 0;
212 u16 autoneg = 0;
213
214 /* retrieve from register structure */
215 dev = eth_get_dev();
216 info = dev->priv;
217
218 fecp = (fec_t *) info->miibase;
219
220 fecpin_setclear(dev, 1);
221
222 mii_reset(info);
223
224 /* We use strictly polling mode only */
225 fecp->eimr = 0;
226
227 /* Clear any pending interrupt */
228 fecp->eir = 0xffffffff;
229
230 /* Set MII speed */
231 miispd = (gd->bus_clk / 1000000) / 5;
232 fecp->mscr = miispd << 1;
233
234 info->phy_addr = mii_discover_phy(dev);
235
236#define AUTONEGLINK (PHY_BMSR_AUTN_COMP | PHY_BMSR_LS)
237 while (i < MCFFEC_TOUT_LOOP) {
238 autoneg = 0;
239 miiphy_read(dev->name, info->phy_addr, PHY_BMSR, &autoneg);
240 i++;
241
242 if ((autoneg & AUTONEGLINK) == AUTONEGLINK)
243 break;
244
245 udelay(500);
246 }
247 if (i >= MCFFEC_TOUT_LOOP) {
248 printf("Auto Negotiation not complete\n");
249 }
250
251 /* adapt to the half/full speed settings */
252 info->dup_spd = miiphy_duplex(dev->name, info->phy_addr) << 16;
253 info->dup_spd |= miiphy_speed(dev->name, info->phy_addr);
254}
255
256/*****************************************************************************
257 * Read and write a MII PHY register, routines used by MII Utilities
258 *
259 * FIXME: These routines are expected to return 0 on success, but mii_send
260 * does _not_ return an error code. Maybe 0xFFFF means error, i.e.
261 * no PHY connected...
262 * For now always return 0.
263 * FIXME: These routines only work after calling eth_init() at least once!
264 * Otherwise they hang in mii_send() !!! Sorry!
265 *****************************************************************************/
266
267int mcffec_miiphy_read(char *devname, unsigned char addr, unsigned char reg,
268 unsigned short *value)
269{
270 short rdreg; /* register working value */
271
272#ifdef MII_DEBUG
273 printf("miiphy_read(0x%x) @ 0x%x = ", reg, addr);
274#endif
275 rdreg = mii_send(mk_mii_read(addr, reg));
276
277 *value = rdreg;
278
279#ifdef MII_DEBUG
280 printf("0x%04x\n", *value);
281#endif
282
283 return 0;
284}
285
286int mcffec_miiphy_write(char *devname, unsigned char addr, unsigned char reg,
287 unsigned short value)
288{
289 short rdreg; /* register working value */
290
291#ifdef MII_DEBUG
292 printf("miiphy_write(0x%x) @ 0x%x = ", reg, addr);
293#endif
294
295 rdreg = mii_send(mk_mii_write(addr, reg, value));
296
297#ifdef MII_DEBUG
298 printf("0x%04x\n", value);
299#endif
300
301 return 0;
302}
303
304#endif /* CONFIG_CMD_NET, FEC_ENET & NET_MULTI */