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git.ipfire.org Git - people/ms/u-boot.git/blob - examples/standalone/82559_eeprom.c
2 * Copyright 1998-2001 by Donald Becker.
3 * This software may be used and distributed according to the terms of
4 * the GNU General Public License (GPL), incorporated herein by reference.
5 * Contact the author for use under other terms.
7 * This program must be compiled with "-O"!
8 * See the bottom of this file for the suggested compile-command.
10 * The author may be reached as becker@scyld.com, or C/O
11 * Scyld Computing Corporation
12 * 410 Severn Ave., Suite 210
15 * Common-sense licensing statement: Using any portion of this program in
16 * your own program means that you must give credit to the original author
17 * and release the resulting code under the GPL.
20 #define _PPC_STRING_H_ /* avoid unnecessary str/mem functions */
27 /* Default EEPROM for i82559 */
28 static unsigned short default_eeprom
[64] = {
29 0x0100, 0x0302, 0x0504, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
30 0xffff, 0xffff, 0x40c0, 0x0000, 0x0000, 0xffff, 0xffff, 0xffff,
31 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
32 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
33 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
34 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
35 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff,
36 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff
39 static unsigned short eeprom
[256];
41 static int eeprom_size
= 64;
42 static int eeprom_addr_size
= 6;
46 static inline unsigned short swap16(unsigned short x
)
48 return (((x
& 0xff) << 8) | ((x
& 0xff00) >> 8));
52 void * memcpy(void * dest
,const void *src
,size_t count
)
54 char *tmp
= (char *) dest
, *s
= (char *) src
;
63 /* The EEPROM commands include the alway-set leading bit. */
64 #define EE_WRITE_CMD (5)
65 #define EE_READ_CMD (6)
66 #define EE_ERASE_CMD (7)
68 /* Serial EEPROM section. */
69 #define EE_SHIFT_CLK 0x01 /* EEPROM shift clock. */
70 #define EE_CS 0x02 /* EEPROM chip select. */
71 #define EE_DATA_WRITE 0x04 /* EEPROM chip data in. */
72 #define EE_DATA_READ 0x08 /* EEPROM chip data out. */
73 #define EE_ENB (0x4800 | EE_CS)
74 #define EE_WRITE_0 0x4802
75 #define EE_WRITE_1 0x4806
78 /* Delay between EEPROM clock transitions. */
79 #define eeprom_delay(ee_addr) inw(ee_addr)
81 /* Wait for the EEPROM to finish the previous operation. */
82 static int eeprom_busy_poll(long ee_ioaddr
)
85 outw(EE_ENB
, ee_ioaddr
);
86 for (i
= 0; i
< 10000; i
++) /* Typical 2000 ticks */
87 if (inw(ee_ioaddr
) & EE_DATA_READ
)
92 /* This executes a generic EEPROM command, typically a write or write enable.
93 It returns the data output from the EEPROM, and thus may also be used for
95 static int do_eeprom_cmd(long ioaddr
, int cmd
, int cmd_len
)
98 long ee_addr
= ioaddr
+ EE_OFFSET
;
101 printf(" EEPROM op 0x%x: ", cmd
);
103 outw(EE_ENB
| EE_SHIFT_CLK
, ee_addr
);
105 /* Shift the command bits out. */
107 short dataval
= (cmd
& (1 << cmd_len
)) ? EE_WRITE_1
: EE_WRITE_0
;
108 outw(dataval
, ee_addr
);
109 eeprom_delay(ee_addr
);
111 printf("%X", inw(ee_addr
) & 15);
112 outw(dataval
| EE_SHIFT_CLK
, ee_addr
);
113 eeprom_delay(ee_addr
);
114 retval
= (retval
<< 1) | ((inw(ee_addr
) & EE_DATA_READ
) ? 1 : 0);
115 } while (--cmd_len
>= 0);
117 outw(EE_ENB
, ee_addr
);
119 /* Terminate the EEPROM access. */
120 outw(EE_ENB
& ~EE_CS
, ee_addr
);
122 printf(" EEPROM result is 0x%5.5x.\n", retval
);
126 static int read_eeprom(long ioaddr
, int location
, int addr_len
)
128 return do_eeprom_cmd(ioaddr
, ((EE_READ_CMD
<< addr_len
) | location
)
129 << 16 , 3 + addr_len
+ 16) & 0xffff;
132 static void write_eeprom(long ioaddr
, int index
, int value
, int addr_len
)
134 long ee_ioaddr
= ioaddr
+ EE_OFFSET
;
137 /* Poll for previous op finished. */
138 eeprom_busy_poll(ee_ioaddr
); /* Typical 0 ticks */
139 /* Enable programming modes. */
140 do_eeprom_cmd(ioaddr
, (0x4f << (addr_len
-4)), 3 + addr_len
);
141 /* Do the actual write. */
142 do_eeprom_cmd(ioaddr
,
143 (((EE_WRITE_CMD
<<addr_len
) | index
)<<16) | (value
& 0xffff),
145 /* Poll for write finished. */
146 i
= eeprom_busy_poll(ee_ioaddr
); /* Typical 2000 ticks */
148 printf(" Write finished after %d ticks.\n", i
);
149 /* Disable programming. This command is not instantaneous, so we check
150 for busy before the next op. */
151 do_eeprom_cmd(ioaddr
, (0x40 << (addr_len
-4)), 3 + addr_len
);
152 eeprom_busy_poll(ee_ioaddr
);
155 static int reset_eeprom(unsigned long ioaddr
, unsigned char *hwaddr
)
157 unsigned short checksum
= 0;
161 printf("Resetting i82559 EEPROM @ 0x%08lx ... ", ioaddr
);
163 size_test
= do_eeprom_cmd(ioaddr
, (EE_READ_CMD
<< 8) << 16, 27);
164 eeprom_addr_size
= (size_test
& 0xffe0000) == 0xffe0000 ? 8 : 6;
165 eeprom_size
= 1 << eeprom_addr_size
;
167 memcpy(eeprom
, default_eeprom
, sizeof default_eeprom
);
169 for (i
= 0; i
< 3; i
++)
170 eeprom
[i
] = (hwaddr
[i
*2+1]<<8) + hwaddr
[i
*2];
172 /* Recalculate the checksum. */
173 for (i
= 0; i
< eeprom_size
- 1; i
++)
174 checksum
+= eeprom
[i
];
175 eeprom
[i
] = 0xBABA - checksum
;
177 for (i
= 0; i
< eeprom_size
; i
++)
178 write_eeprom(ioaddr
, i
, eeprom
[i
], eeprom_addr_size
);
180 for (i
= 0; i
< eeprom_size
; i
++)
181 if (read_eeprom(ioaddr
, i
, eeprom_addr_size
) != eeprom
[i
]) {
190 static unsigned int hatoi(char *p
, char **errp
)
192 unsigned int res
= 0;
202 res
|= (*p
- 'a' + 10);
210 res
|= (*p
- 'A' + 10);
244 static unsigned char *gethwaddr(char *in
, unsigned char *out
)
251 if (in
[i
*3+2] == 0 && i
== 5) {
252 out
[i
] = hatoi(&in
[i
*3], &err
);
256 } else if (in
[i
*3+2] == ':' && i
< 5) {
260 out
[i
] = hatoi(tmp
, &err
);
273 read_config_dword(int bus
, int dev
, int func
, int reg
)
277 outl(0x80000000|(bus
&0xff)<<16|(dev
&0x1f)<<11|(func
&7)<<8|(reg
&0xfc),
285 read_config_word(int bus
, int dev
, int func
, int reg
)
289 outl(0x80000000|(bus
&0xff)<<16|(dev
&0x1f)<<11|(func
&7)<<8|(reg
&0xfc),
291 res
= inw(0xcfc + (reg
& 2));
297 write_config_word(int bus
, int dev
, int func
, int reg
, u16 data
)
300 outl(0x80000000|(bus
&0xff)<<16|(dev
&0x1f)<<11|(func
&7)<<8|(reg
&0xfc),
302 outw(data
, 0xcfc + (reg
& 2));
307 int main (int argc
, char * const argv
[])
309 unsigned char *eth_addr
;
315 printf ("call with base Ethernet address\n");
320 eth_addr
= gethwaddr(argv
[1], buf
);
321 if (NULL
== eth_addr
) {
322 printf ("Can not parse ethernet address\n");
325 if (eth_addr
[5] & 0x01) {
326 printf("Base Ethernet address must be even\n");
330 for (instance
= 0; instance
< 2; instance
++) {
331 unsigned int io_addr
;
332 unsigned char mac
[6];
333 int bar1
= read_config_dword(0, 6+instance
, 0, 0x14);
335 printf("ETH%d is disabled %x\n", instance
, bar1
);
337 printf("ETH%d IO=0x%04x\n", instance
, bar1
& ~3);
339 io_addr
= (bar1
& (~3L));
342 write_config_word(0, 6+instance
, 0, 4,
343 read_config_word(0, 6+instance
, 0, 4) | 1);
344 printf("ETH%d CMD %04x\n", instance
,
345 read_config_word(0, 6+instance
, 0, 4));
347 memcpy(mac
, eth_addr
, 6);
350 printf("got io=%04x, ha=%02x:%02x:%02x:%02x:%02x:%02x\n",
351 io_addr
, mac
[0], mac
[1], mac
[2],
352 mac
[3], mac
[4], mac
[5]);
353 reset_eeprom(io_addr
, mac
);