1/*
2 * BCM63XX specific implementation parts
3 *
4 * Copyright (C) 2014 Jonas Gorski <jogo@openwrt.org>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
9 */
10
11#include <stddef.h>
12#include "config.h"
13#include "cp0regdef.h"
14
15#define READREG(r)	*(volatile unsigned int *)(r)
16#define WRITEREG(r,v)	*(volatile unsigned int *)(r) = v
17
18#define UART_IR_REG	0x10
19#define UART_FIFO_REG	0x14
20
21unsigned long uart_base;
22
23static void wait_xfered(void)
24{
25        unsigned int val;
26
27        do {
28                val = READREG(uart_base + UART_IR_REG);
29                if (val & (1 << 5))
30                        break;
31        } while (1);
32}
33
34void board_putc(int ch)
35{
36	if (!uart_base)
37		return;
38
39	wait_xfered();
40        WRITEREG(uart_base + UART_FIFO_REG, ch);
41	wait_xfered();
42}
43
44#define PRID_IMP_BMIPS32_REV4	0x4000
45#define PRID_IMP_BMIPS32_REV8	0x8000
46#define PRID_IMP_BMIPS3300	0x9000
47#define PRID_IMP_BMIPS3300_ALT	0x9100
48#define PRID_IMP_BMIPS3300_BUG	0x0000
49#define PRID_IMP_BMIPS43XX	0xa000
50
51void board_init(void)
52{
53	unsigned long prid, chipid, chipid_reg;
54
55	prid = read_32bit_c0_register($15, 0);
56
57	switch (prid & 0xff00) {
58	case PRID_IMP_BMIPS32_REV4:
59	case PRID_IMP_BMIPS32_REV8:
60	case PRID_IMP_BMIPS3300_ALT:
61	case PRID_IMP_BMIPS3300_BUG:
62		chipid_reg = 0xfffe0000;
63		break;
64	case PRID_IMP_BMIPS3300:
65		if ((prid & 0xff) >= 0x33)
66			chipid_reg = 0xb0000000;
67		else
68			chipid_reg = 0xfffe0000;
69		break;
70	case PRID_IMP_BMIPS43XX:
71		if ((prid & 0xff) == 0x04)
72			chipid_reg = 0xfff8c000;
73		else if ((prid & 0xff) == 0x70)
74			chipid_reg = 0xb4e00000;
75		else if ((prid & 0xff) >= 0x30)
76			chipid_reg = 0xb0000000;
77		else
78			chipid_reg = 0xfffe0000;
79		break;
80	default:
81		return;
82	}
83
84	chipid = READREG(chipid_reg);
85
86	switch (chipid >> 16) {
87	case 0x3368:
88	case 0x6318:
89	case 0x6328:
90	case 0x6358:
91	case 0x6362:
92	case 0x6368:
93	case 0x6369:
94		uart_base = chipid_reg + 0x100;
95		break;
96	case 0x6316:
97	case 0x6326:
98		uart_base = chipid_reg + 0x180;
99		break;
100	case 0x3380:
101		uart_base = chipid_reg + 0x200;
102		break;
103	case 0x6338:
104	case 0x6345:
105	case 0x6348:
106		uart_base = chipid_reg + 0x300;
107		break;
108	default:
109		return;
110	}
111}
112