summaryrefslogtreecommitdiff
path: root/arch/mips/alchemy/devboards/pb1200/board_setup.c
blob: 6d06b07c238111b774c2a7e2a15a68dfcbbc4b6f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
/*
 *
 * BRIEF MODULE DESCRIPTION
 *	Alchemy Pb1200/Db1200 board setup.
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/sched.h>

#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-db1x00/bcsr.h>

#ifdef CONFIG_MIPS_PB1200
#include <asm/mach-pb1x00/pb1200.h>
#endif

#ifdef CONFIG_MIPS_DB1200
#include <asm/mach-db1x00/db1200.h>
#define PB1200_INT_BEGIN DB1200_INT_BEGIN
#define PB1200_INT_END DB1200_INT_END
#endif

#include <prom.h>

const char *get_system_type(void)
{
	return "Alchemy Pb1200";
}

void __init board_setup(void)
{
	printk(KERN_INFO "AMD Alchemy Pb1200 Board\n");
	bcsr_init(PB1200_BCSR_PHYS_ADDR,
		  PB1200_BCSR_PHYS_ADDR + PB1200_BCSR_HEXLED_OFS);

#if 0
	{
		u32 pin_func;

		/*
		 * Enable PSC1 SYNC for AC97.  Normaly done in audio driver,
		 * but it is board specific code, so put it here.
		 */
		pin_func = au_readl(SYS_PINFUNC);
		au_sync();
		pin_func |= SYS_PF_MUST_BE_SET | SYS_PF_PSC1_S1;
		au_writel(pin_func, SYS_PINFUNC);

		au_writel(0, (u32)bcsr | 0x10); /* turn off PCMCIA power */
		au_sync();
	}
#endif

#if defined(CONFIG_I2C_AU1550)
	{
		u32 freq0, clksrc;
		u32 pin_func;

		/* Select SMBus in CPLD */
		bcsr_mod(BCSR_RESETS, BCSR_RESETS_PSC0MUX, 0);

		pin_func = au_readl(SYS_PINFUNC);
		au_sync();
		pin_func &= ~(SYS_PINFUNC_P0A | SYS_PINFUNC_P0B);
		/* Set GPIOs correctly */
		pin_func |= 2 << 17;
		au_writel(pin_func, SYS_PINFUNC);
		au_sync();

		/* The I2C driver depends on 50 MHz clock */
		freq0 = au_readl(SYS_FREQCTRL0);
		au_sync();
		freq0 &= ~(SYS_FC_FRDIV1_MASK | SYS_FC_FS1 | SYS_FC_FE1);
		freq0 |= 3 << SYS_FC_FRDIV1_BIT;
		/* 396 MHz / (3 + 1) * 2 == 49.5 MHz */
		au_writel(freq0, SYS_FREQCTRL0);
		au_sync();
		freq0 |= SYS_FC_FE1;
		au_writel(freq0, SYS_FREQCTRL0);
		au_sync();

		clksrc = au_readl(SYS_CLKSRC);
		au_sync();
		clksrc &= ~(SYS_CS_CE0 | SYS_CS_DE0 | SYS_CS_ME0_MASK);
		/* Bit 22 is EXTCLK0 for PSC0 */
		clksrc |= SYS_CS_MUX_FQ1 << SYS_CS_ME0_BIT;
		au_writel(clksrc, SYS_CLKSRC);
		au_sync();
	}
#endif

	/*
	 * The Pb1200 development board uses external MUX for PSC0 to
	 * support SMB/SPI. bcsr_resets bit 12: 0=SMB 1=SPI
	 */
#ifdef CONFIG_I2C_AU1550
	bcsr_mod(BCSR_RESETS, BCSR_RESETS_PSC0MUX, 0);
#endif
	au_sync();
}

static int __init pb1200_init_irq(void)
{
	/* We have a problem with CPLD rev 3. */
	if (BCSR_WHOAMI_CPLD(bcsr_read(BCSR_WHOAMI)) <= 3) {
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "Pb1200 must be at CPLD rev 4. Please have Pb1200\n");
		printk(KERN_ERR "updated to latest revision. This software will\n");
		printk(KERN_ERR "not work on anything less than CPLD rev 4.\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		printk(KERN_ERR "WARNING!!!\n");
		panic("Game over.  Your score is 0.");
	}

	irq_set_irq_type(AU1200_GPIO7_INT, IRQF_TRIGGER_LOW);
	bcsr_init_irq(PB1200_INT_BEGIN, PB1200_INT_END, AU1200_GPIO7_INT);

	return 0;
}
arch_initcall(pb1200_init_irq);


int board_au1200fb_panel(void)
{
	return (bcsr_read(BCSR_SWITCHES) >> 8) & 0x0f;
}

int board_au1200fb_panel_init(void)
{
	/* Apply power */
	bcsr_mod(BCSR_BOARD, 0, BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD |
				BCSR_BOARD_LCDBL);
	/* printk(KERN_DEBUG "board_au1200fb_panel_init()\n"); */
	return 0;
}

int board_au1200fb_panel_shutdown(void)
{
	/* Remove power */
	bcsr_mod(BCSR_BOARD, BCSR_BOARD_LCDVEE | BCSR_BOARD_LCDVDD |
			     BCSR_BOARD_LCDBL, 0);
	/* printk(KERN_DEBUG "board_au1200fb_panel_shutdown()\n"); */
	return 0;
}