1 /*
2 *
3 * BRIEF MODULE DESCRIPTION
4 * Alchemy Pb1100 board setup.
5 *
6 * Copyright 2002 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc.
8 * ppopov@mvista.com or source@mvista.com
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 *
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
17 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
18 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
21 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
22 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * You should have received a copy of the GNU General Public License along
27 * with this program; if not, write to the Free Software Foundation, Inc.,
28 * 675 Mass Ave, Cambridge, MA 02139, USA.
29 */
30 #include <linux/config.h>
31 #include <linux/init.h>
32 #include <linux/sched.h>
33 #include <linux/ioport.h>
34 #include <linux/mm.h>
35 #include <linux/console.h>
36 #include <linux/mc146818rtc.h>
37 #include <linux/delay.h>
38
39 #include <asm/cpu.h>
40 #include <asm/bootinfo.h>
41 #include <asm/irq.h>
42 #include <asm/keyboard.h>
43 #include <asm/mipsregs.h>
44 #include <asm/reboot.h>
45 #include <asm/pgtable.h>
46 #include <asm/au1000.h>
47 #include <asm/pb1100.h>
48
49 #ifdef CONFIG_USB_OHCI
50 // Enable the workaround for the OHCI DoneHead
51 // register corruption problem.
52 #define CONFIG_AU1000_OHCI_FIX
53 #endif
54
55 #ifdef CONFIG_RTC
56 extern struct rtc_ops pb1500_rtc_ops;
57 #endif
58
board_reset(void)59 void board_reset (void)
60 {
61 /* Hit BCSR.SYSTEM_CONTROL[SW_RST] */
62 au_writel(0x00000000, 0xAE00001C);
63 }
64
board_setup(void)65 void __init board_setup(void)
66 {
67 u32 pin_func;
68 u32 sys_freqctrl, sys_clksrc;
69
70 // set AUX clock to 12MHz * 8 = 96 MHz
71 au_writel(8, SYS_AUXPLL);
72 au_writel(0, SYS_PININPUTEN);
73 udelay(100);
74
75 #if defined (CONFIG_USB_OHCI) || defined (CONFIG_AU1X00_USB_DEVICE)
76 // configure pins GPIO[14:9] as GPIO
77 pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x80);
78
79 /* zero and disable FREQ2 */
80 sys_freqctrl = au_readl(SYS_FREQCTRL0);
81 sys_freqctrl &= ~0xFFF00000;
82 au_writel(sys_freqctrl, SYS_FREQCTRL0);
83
84 /* zero and disable USBH/USBD/IrDA clock */
85 sys_clksrc = au_readl(SYS_CLKSRC);
86 sys_clksrc &= ~0x0000001F;
87 au_writel(sys_clksrc, SYS_CLKSRC);
88
89 sys_freqctrl = au_readl(SYS_FREQCTRL0);
90 sys_freqctrl &= ~0xFFF00000;
91
92 sys_clksrc = au_readl(SYS_CLKSRC);
93 sys_clksrc &= ~0x0000001F;
94
95 // FREQ2 = aux/2 = 48 MHz
96 sys_freqctrl |= ((0<<22) | (1<<21) | (1<<20));
97 au_writel(sys_freqctrl, SYS_FREQCTRL0);
98
99 /*
100 * Route 48MHz FREQ2 into USBH/USBD/IrDA
101 */
102 sys_clksrc |= ((4<<2) | (0<<1) | 0 );
103 au_writel(sys_clksrc, SYS_CLKSRC);
104
105 /* setup the static bus controller */
106 au_writel(0x00000002, MEM_STCFG3); /* type = PCMCIA */
107 au_writel(0x280E3D07, MEM_STTIME3); /* 250ns cycle time */
108 au_writel(0x10000000, MEM_STADDR3); /* any PCMCIA select */
109
110 // get USB Functionality pin state (device vs host drive pins)
111 pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x8000);
112 #ifndef CONFIG_AU1X00_USB_DEVICE
113 // 2nd USB port is USB host
114 pin_func |= 0x8000;
115 #endif
116 au_writel(pin_func, SYS_PINFUNC);
117 #endif // defined (CONFIG_USB_OHCI) || defined (CONFIG_AU1X00_USB_DEVICE)
118
119 /* Enable sys bus clock divider when IDLE state or no bus activity. */
120 au_writel(au_readl(SYS_POWERCTRL) | (0x3 << 5), SYS_POWERCTRL);
121
122 #ifdef CONFIG_RTC
123 rtc_ops = &pb1500_rtc_ops;
124 // Enable the RTC if not already enabled
125 if (!(readb(0xac000028) & 0x20)) {
126 writeb(readb(0xac000028) | 0x20, 0xac000028);
127 au_sync();
128 }
129 // Put the clock in BCD mode
130 if (readb(0xac00002C) & 0x4) { /* reg B */
131 writeb(readb(0xac00002c) & ~0x4, 0xac00002c);
132 au_sync();
133 }
134 #endif
135 }
136