1 /*
2  * Copyright (c) 2008 Travis Geiselbrecht
3  *
4  * Use of this source code is governed by a MIT-style
5  * license that can be found in the LICENSE file or at
6  * https://opensource.org/licenses/MIT
7  */
8 #include <sys/types.h>
9 #include <lk/debug.h>
10 #include <lk/trace.h>
11 #include <stdio.h>
12 #include <dev/net/smc91c96.h>
13 #include "smc91c96_p.h"
14 
15 #if !defined(SMC91C96_BASE_ADDR) || !defined(SMC91C96_IRQ)
16 #error need to define SMC91C96_BASE_ADDR and SMC91C96_IRQ in project
17 #endif
18 
19 static addr_t smc91c96_base = SMC91C96_BASE_ADDR;
20 static uint8_t mac_addr[6];
21 
22 #define SMC_REG16(reg) ((volatile uint16_t *)(smc91c96_base + (reg)))
23 #define SMC_REG8(reg) ((volatile uint8_t *)(smc91c96_base + (reg)))
24 
smc_bank(int bank)25 static inline void smc_bank(int bank) {
26     *SMC_REG16(SMC_BSR) = bank;
27 }
28 
smc91c96_init(void)29 void smc91c96_init(void) {
30     int i;
31 
32     TRACE;
33 
34     // try to detect it
35     if ((*SMC_REG16(SMC_BSR) & 0xff00) != 0x3300) {
36         TRACEF("didn't see smc91c96 chip at 0x%x\n", (unsigned int)smc91c96_base);
37     }
38 
39     // read revision
40     smc_bank(3);
41     TRACEF("detected, revision 0x%x\n", *SMC_REG16(SMC_REV));
42 
43     // read in the mac address
44     smc_bank(1);
45     for (i=0; i < 6; i++) {
46         mac_addr[i] = *SMC_REG8(SMC_IAR0 + i);
47     }
48     TRACEF("mac address %02x:%02x:%02x:%02x:%02x:%02x\n",
49            mac_addr[0], mac_addr[1], mac_addr[2],
50            mac_addr[3], mac_addr[4], mac_addr[5]);
51 
52     smc_bank(0);
53 }
54 
55