1/*
2 * Copyright 2002 MontaVista Software Inc.
3 * Author: MontaVista Software, Inc.
4 *         	ppopov@mvista.com or source@mvista.com
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 as published by the
8 *  Free Software Foundation;  either version 2 of the  License, or (at your
9 *  option) any later version.
10 *
11 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
12 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
13 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
14 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
15 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
16 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
17 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
18 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
19 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
20 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21 *
22 *  You should have received a copy of the  GNU General Public License along
23 *  with this program; if not, write  to the Free Software Foundation, Inc.,
24 *  675 Mass Ave, Cambridge, MA 02139, USA.
25 */
26#include <linux/init.h>
27#include <linux/sched.h>
28#include <linux/ioport.h>
29#include <linux/mm.h>
30#include <linux/console.h>
31#include <linux/delay.h>
32
33#include <asm/cpu.h>
34#include <asm/bootinfo.h>
35#include <asm/irq.h>
36#include <asm/mipsregs.h>
37#include <asm/reboot.h>
38#include <asm/pgtable.h>
39#include <asm/mach-au1x00/au1000.h>
40#include <asm/mach-pb1x00/pb1100.h>
41
42void board_reset (void)
43{
44    /* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
45    au_writel(0x00000000, 0xAE00001C);
46}
47
48void __init board_setup(void)
49{
50	volatile void __iomem * base = (volatile void __iomem *) 0xac000000UL;
51
52	// set AUX clock to 12MHz * 8 = 96 MHz
53	au_writel(8, SYS_AUXPLL);
54	au_writel(0, SYS_PININPUTEN);
55	udelay(100);
56
57#ifdef CONFIG_USB_OHCI
58	{
59		u32 pin_func, sys_freqctrl, sys_clksrc;
60
61		// configure pins GPIO[14:9] as GPIO
62		pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x80);
63
64		/* zero and disable FREQ2 */
65		sys_freqctrl = au_readl(SYS_FREQCTRL0);
66		sys_freqctrl &= ~0xFFF00000;
67		au_writel(sys_freqctrl, SYS_FREQCTRL0);
68
69		/* zero and disable USBH/USBD/IrDA clock */
70		sys_clksrc = au_readl(SYS_CLKSRC);
71		sys_clksrc &= ~0x0000001F;
72		au_writel(sys_clksrc, SYS_CLKSRC);
73
74		sys_freqctrl = au_readl(SYS_FREQCTRL0);
75		sys_freqctrl &= ~0xFFF00000;
76
77		sys_clksrc = au_readl(SYS_CLKSRC);
78		sys_clksrc &= ~0x0000001F;
79
80		// FREQ2 = aux/2 = 48 MHz
81		sys_freqctrl |= ((0<<22) | (1<<21) | (1<<20));
82		au_writel(sys_freqctrl, SYS_FREQCTRL0);
83
84		/*
85		 * Route 48MHz FREQ2 into USBH/USBD/IrDA
86		 */
87		sys_clksrc |= ((4<<2) | (0<<1) | 0 );
88		au_writel(sys_clksrc, SYS_CLKSRC);
89
90		/* setup the static bus controller */
91		au_writel(0x00000002, MEM_STCFG3);  /* type = PCMCIA */
92		au_writel(0x280E3D07, MEM_STTIME3); /* 250ns cycle time */
93		au_writel(0x10000000, MEM_STADDR3); /* any PCMCIA select */
94
95		// get USB Functionality pin state (device vs host drive pins)
96		pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x8000);
97		// 2nd USB port is USB host
98		pin_func |= 0x8000;
99		au_writel(pin_func, SYS_PINFUNC);
100	}
101#endif // defined (CONFIG_USB_OHCI)
102
103	/* Enable sys bus clock divider when IDLE state or no bus activity. */
104	au_writel(au_readl(SYS_POWERCTRL) | (0x3 << 5), SYS_POWERCTRL);
105
106	// Enable the RTC if not already enabled
107	if (!(readb(base + 0x28) & 0x20)) {
108		writeb(readb(base + 0x28) | 0x20, base + 0x28);
109		au_sync();
110	}
111	// Put the clock in BCD mode
112	if (readb(base + 0x2C) & 0x4) { /* reg B */
113		writeb(readb(base + 0x2c) & ~0x4, base + 0x2c);
114		au_sync();
115	}
116}
117