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[MIPS] Malta: Fix for SOCitSC based Maltas
[net-next-2.6.git] / arch / mips / mips-boards / malta / malta_setup.c
1 /*
2  * Carsten Langgaard, carstenl@mips.com
3  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
4  *
5  *  This program is free software; you can distribute it and/or modify it
6  *  under the terms of the GNU General Public License (Version 2) as
7  *  published by the Free Software Foundation.
8  *
9  *  This program is distributed in the hope it will be useful, but WITHOUT
10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  *  for more details.
13  *
14  *  You should have received a copy of the GNU General Public License along
15  *  with this program; if not, write to the Free Software Foundation, Inc.,
16  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
17  */
18 #include <linux/init.h>
19 #include <linux/sched.h>
20 #include <linux/ioport.h>
21 #include <linux/pci.h>
22 #include <linux/screen_info.h>
23
24 #include <asm/cpu.h>
25 #include <asm/bootinfo.h>
26 #include <asm/irq.h>
27 #include <asm/mips-boards/generic.h>
28 #include <asm/mips-boards/prom.h>
29 #include <asm/mips-boards/malta.h>
30 #include <asm/mips-boards/maltaint.h>
31 #include <asm/dma.h>
32 #include <asm/time.h>
33 #include <asm/traps.h>
34 #ifdef CONFIG_VT
35 #include <linux/console.h>
36 #endif
37
38 extern void mips_reboot_setup(void);
39 extern void mips_time_init(void);
40 extern unsigned long mips_rtc_get_time(void);
41
42 #ifdef CONFIG_KGDB
43 extern void kgdb_config(void);
44 #endif
45
46 struct resource standard_io_resources[] = {
47         { .name = "dma1", .start = 0x00, .end = 0x1f, .flags = IORESOURCE_BUSY },
48         { .name = "timer", .start = 0x40, .end = 0x5f, .flags = IORESOURCE_BUSY },
49         { .name = "keyboard", .start = 0x60, .end = 0x6f, .flags = IORESOURCE_BUSY },
50         { .name = "dma page reg", .start = 0x80, .end = 0x8f, .flags = IORESOURCE_BUSY },
51         { .name = "dma2", .start = 0xc0, .end = 0xdf, .flags = IORESOURCE_BUSY },
52 };
53
54 const char *get_system_type(void)
55 {
56         return "MIPS Malta";
57 }
58
59 #if defined(CONFIG_MIPS_MT_SMTC)
60 const char display_string[] = "       SMTC LINUX ON MALTA       ";
61 #else
62 const char display_string[] = "        LINUX ON MALTA       ";
63 #endif /* CONFIG_MIPS_MT_SMTC */
64
65 #ifdef CONFIG_BLK_DEV_FD
66 void __init fd_activate(void)
67 {
68         /*
69          * Activate Floppy Controller in the SMSC FDC37M817 Super I/O
70          * Controller.
71          * Done by YAMON 2.00 onwards
72          */
73         /* Entering config state. */
74         SMSC_WRITE(SMSC_CONFIG_ENTER, SMSC_CONFIG_REG);
75
76         /* Activate floppy controller. */
77         SMSC_WRITE(SMSC_CONFIG_DEVNUM, SMSC_CONFIG_REG);
78         SMSC_WRITE(SMSC_CONFIG_DEVNUM_FLOPPY, SMSC_DATA_REG);
79         SMSC_WRITE(SMSC_CONFIG_ACTIVATE, SMSC_CONFIG_REG);
80         SMSC_WRITE(SMSC_CONFIG_ACTIVATE_ENABLE, SMSC_DATA_REG);
81
82         /* Exit config state. */
83         SMSC_WRITE(SMSC_CONFIG_EXIT, SMSC_CONFIG_REG);
84 }
85 #endif
86
87 void __init plat_mem_setup(void)
88 {
89         unsigned int i;
90
91         mips_pcibios_init();
92
93         /* Request I/O space for devices used on the Malta board. */
94         for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
95                 request_resource(&ioport_resource, standard_io_resources+i);
96
97         /*
98          * Enable DMA channel 4 (cascade channel) in the PIIX4 south bridge.
99          */
100         enable_dma(4);
101
102 #ifdef CONFIG_KGDB
103         kgdb_config ();
104 #endif
105
106         if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO) {
107                 char *argptr;
108
109                 argptr = prom_getcmdline();
110                 if (strstr(argptr, "debug")) {
111                         BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
112                         printk ("Enabled Bonito debug mode\n");
113                 }
114                 else
115                         BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;
116
117 #ifdef CONFIG_DMA_COHERENT
118                 if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
119                         BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
120                         printk("Enabled Bonito CPU coherency\n");
121
122                         argptr = prom_getcmdline();
123                         if (strstr(argptr, "iobcuncached")) {
124                                 BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
125                                 BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
126                                         ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
127                                           BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
128                                 printk("Disabled Bonito IOBC coherency\n");
129                         }
130                         else {
131                                 BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
132                                 BONITO_PCIMEMBASECFG |=
133                                         (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
134                                          BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
135                                 printk("Enabled Bonito IOBC coherency\n");
136                         }
137                 }
138                 else
139                         panic("Hardware DMA cache coherency not supported");
140
141 #endif
142         }
143 #ifdef CONFIG_DMA_COHERENT
144         else {
145                 panic("Hardware DMA cache coherency not supported");
146         }
147 #endif
148
149 #ifdef CONFIG_BLK_DEV_IDE
150         /* Check PCI clock */
151         {
152                 unsigned int __iomem *jmpr_p = (unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int));
153                 int jmpr = (readw(jmpr_p) >> 2) & 0x07;
154                 static const int pciclocks[] __initdata = {
155                         33, 20, 25, 30, 12, 16, 37, 10
156                 };
157                 int pciclock = pciclocks[jmpr];
158                 char *argptr = prom_getcmdline();
159
160                 if (pciclock != 33 && !strstr (argptr, "idebus=")) {
161                         printk("WARNING: PCI clock is %dMHz, setting idebus\n", pciclock);
162                         argptr += strlen(argptr);
163                         sprintf (argptr, " idebus=%d", pciclock);
164                         if (pciclock < 20 || pciclock > 66)
165                                 printk ("WARNING: IDE timing calculations will be incorrect\n");
166                 }
167         }
168 #endif
169 #ifdef CONFIG_BLK_DEV_FD
170         fd_activate ();
171 #endif
172 #ifdef CONFIG_VT
173 #if defined(CONFIG_VGA_CONSOLE)
174         screen_info = (struct screen_info) {
175                 0, 25,                  /* orig-x, orig-y */
176                 0,                      /* unused */
177                 0,                      /* orig-video-page */
178                 0,                      /* orig-video-mode */
179                 80,                     /* orig-video-cols */
180                 0,0,0,                  /* ega_ax, ega_bx, ega_cx */
181                 25,                     /* orig-video-lines */
182                 VIDEO_TYPE_VGAC,        /* orig-video-isVGA */
183                 16                      /* orig-video-points */
184         };
185 #endif
186 #endif
187         mips_reboot_setup();
188
189         board_time_init = mips_time_init;
190         rtc_mips_get_time = mips_rtc_get_time;
191 }