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1da177e4 LT |
1 | /* |
2 | * Copyright 2000 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/config.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/sched.h> | |
29 | #include <linux/ioport.h> | |
30 | #include <linux/mm.h> | |
31 | #include <linux/console.h> | |
32 | #include <linux/delay.h> | |
33 | ||
34 | #include <asm/cpu.h> | |
35 | #include <asm/bootinfo.h> | |
36 | #include <asm/irq.h> | |
37 | #include <asm/mipsregs.h> | |
38 | #include <asm/reboot.h> | |
39 | #include <asm/pgtable.h> | |
40 | #include <asm/mach-au1x00/au1000.h> | |
41 | #include <asm/mach-pb1x00/pb1000.h> | |
42 | ||
43 | void board_reset (void) | |
44 | { | |
45 | } | |
46 | ||
47 | void __init board_setup(void) | |
48 | { | |
49 | u32 pin_func, static_cfg0; | |
50 | u32 sys_freqctrl, sys_clksrc; | |
51 | u32 prid = read_c0_prid(); | |
52 | ||
53 | // set AUX clock to 12MHz * 8 = 96 MHz | |
54 | au_writel(8, SYS_AUXPLL); | |
55 | au_writel(0, SYS_PINSTATERD); | |
56 | udelay(100); | |
57 | ||
58 | #if defined (CONFIG_USB_OHCI) || defined (CONFIG_AU1X00_USB_DEVICE) | |
59 | /* zero and disable FREQ2 */ | |
60 | sys_freqctrl = au_readl(SYS_FREQCTRL0); | |
61 | sys_freqctrl &= ~0xFFF00000; | |
62 | au_writel(sys_freqctrl, SYS_FREQCTRL0); | |
63 | ||
64 | /* zero and disable USBH/USBD clocks */ | |
65 | sys_clksrc = au_readl(SYS_CLKSRC); | |
66 | sys_clksrc &= ~0x00007FE0; | |
67 | au_writel(sys_clksrc, SYS_CLKSRC); | |
68 | ||
69 | sys_freqctrl = au_readl(SYS_FREQCTRL0); | |
70 | sys_freqctrl &= ~0xFFF00000; | |
71 | ||
72 | sys_clksrc = au_readl(SYS_CLKSRC); | |
73 | sys_clksrc &= ~0x00007FE0; | |
74 | ||
75 | switch (prid & 0x000000FF) | |
76 | { | |
77 | case 0x00: /* DA */ | |
78 | case 0x01: /* HA */ | |
79 | case 0x02: /* HB */ | |
80 | /* CPU core freq to 48MHz to slow it way down... */ | |
81 | au_writel(4, SYS_CPUPLL); | |
82 | ||
83 | /* | |
84 | * Setup 48MHz FREQ2 from CPUPLL for USB Host | |
85 | */ | |
86 | /* FRDIV2=3 -> div by 8 of 384MHz -> 48MHz */ | |
87 | sys_freqctrl |= ((3<<22) | (1<<21) | (0<<20)); | |
88 | au_writel(sys_freqctrl, SYS_FREQCTRL0); | |
89 | ||
90 | /* CPU core freq to 384MHz */ | |
91 | au_writel(0x20, SYS_CPUPLL); | |
92 | ||
93 | printk("Au1000: 48MHz OHCI workaround enabled\n"); | |
94 | break; | |
95 | ||
96 | default: /* HC and newer */ | |
97 | // FREQ2 = aux/2 = 48 MHz | |
98 | sys_freqctrl |= ((0<<22) | (1<<21) | (1<<20)); | |
99 | au_writel(sys_freqctrl, SYS_FREQCTRL0); | |
100 | break; | |
101 | } | |
102 | ||
103 | /* | |
104 | * Route 48MHz FREQ2 into USB Host and/or Device | |
105 | */ | |
106 | #ifdef CONFIG_USB_OHCI | |
107 | sys_clksrc |= ((4<<12) | (0<<11) | (0<<10)); | |
108 | #endif | |
109 | #ifdef CONFIG_AU1X00_USB_DEVICE | |
110 | sys_clksrc |= ((4<<7) | (0<<6) | (0<<5)); | |
111 | #endif | |
112 | au_writel(sys_clksrc, SYS_CLKSRC); | |
113 | ||
114 | // configure pins GPIO[14:9] as GPIO | |
115 | pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x8080); | |
116 | ||
117 | #ifndef CONFIG_AU1X00_USB_DEVICE | |
118 | // 2nd USB port is USB host | |
119 | pin_func |= 0x8000; | |
120 | #endif | |
121 | au_writel(pin_func, SYS_PINFUNC); | |
122 | au_writel(0x2800, SYS_TRIOUTCLR); | |
123 | au_writel(0x0030, SYS_OUTPUTCLR); | |
124 | #endif // defined (CONFIG_USB_OHCI) || defined (CONFIG_AU1X00_USB_DEVICE) | |
125 | ||
126 | // make gpio 15 an input (for interrupt line) | |
127 | pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x100); | |
128 | // we don't need I2S, so make it available for GPIO[31:29] | |
129 | pin_func |= (1<<5); | |
130 | au_writel(pin_func, SYS_PINFUNC); | |
131 | ||
132 | au_writel(0x8000, SYS_TRIOUTCLR); | |
133 | ||
134 | static_cfg0 = au_readl(MEM_STCFG0) & (u32)(~0xc00); | |
135 | au_writel(static_cfg0, MEM_STCFG0); | |
136 | ||
137 | // configure RCE2* for LCD | |
138 | au_writel(0x00000004, MEM_STCFG2); | |
139 | ||
140 | // MEM_STTIME2 | |
141 | au_writel(0x09000000, MEM_STTIME2); | |
142 | ||
143 | // Set 32-bit base address decoding for RCE2* | |
144 | au_writel(0x10003ff0, MEM_STADDR2); | |
145 | ||
146 | // PCI CPLD setup | |
147 | // expand CE0 to cover PCI | |
148 | au_writel(0x11803e40, MEM_STADDR1); | |
149 | ||
150 | // burst visibility on | |
151 | au_writel(au_readl(MEM_STCFG0) | 0x1000, MEM_STCFG0); | |
152 | ||
153 | au_writel(0x83, MEM_STCFG1); // ewait enabled, flash timing | |
154 | au_writel(0x33030a10, MEM_STTIME1); // slower timing for FPGA | |
155 | ||
156 | /* setup the static bus controller */ | |
157 | au_writel(0x00000002, MEM_STCFG3); /* type = PCMCIA */ | |
158 | au_writel(0x280E3D07, MEM_STTIME3); /* 250ns cycle time */ | |
159 | au_writel(0x10000000, MEM_STADDR3); /* any PCMCIA select */ | |
160 | ||
161 | #ifdef CONFIG_PCI | |
162 | au_writel(0, PCI_BRIDGE_CONFIG); // set extend byte to 0 | |
163 | au_writel(0, SDRAM_MBAR); // set mbar to 0 | |
164 | au_writel(0x2, SDRAM_CMD); // enable memory accesses | |
165 | au_sync_delay(1); | |
166 | #endif | |
167 | ||
168 | /* Enable Au1000 BCLK switching - note: sed1356 must not use | |
169 | * its BCLK (Au1000 LCLK) for any timings */ | |
170 | switch (prid & 0x000000FF) | |
171 | { | |
172 | case 0x00: /* DA */ | |
173 | case 0x01: /* HA */ | |
174 | case 0x02: /* HB */ | |
175 | break; | |
176 | default: /* HC and newer */ | |
42a3b4f2 | 177 | /* Enable sys bus clock divider when IDLE state or no bus |
1da177e4 LT |
178 | activity. */ |
179 | au_writel(au_readl(SYS_POWERCTRL) | (0x3 << 5), SYS_POWERCTRL); | |
180 | break; | |
181 | } | |
182 | } |