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1 /*
2  * (C) Copyright 2005
3  * Stefan Roese, DENX Software Engineering, sr@denx.de.
4  *
5  * Copyright (C) 2002 Scott McNutt <smcnutt@artesyncp.com>
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  */
25
26 #include <common.h>
27 #include <asm/processor.h>
28 #include <command.h>
29
30 #include "p3p440.h"
31
32 DECLARE_GLOBAL_DATA_PTR;
33
34 void set_led(int color)
35 {
36         switch (color) {
37         case LED_OFF:
38                 out32(GPIO0_OR,  in32(GPIO0_OR) & ~CONFIG_SYS_LED_GREEN & ~CONFIG_SYS_LED_RED);
39                 break;
40
41         case LED_GREEN:
42                 out32(GPIO0_OR,  (in32(GPIO0_OR) | CONFIG_SYS_LED_GREEN) & ~CONFIG_SYS_LED_RED);
43                 break;
44
45         case LED_RED:
46                 out32(GPIO0_OR,  (in32(GPIO0_OR) | CONFIG_SYS_LED_RED) & ~CONFIG_SYS_LED_GREEN);
47                 break;
48
49         case LED_ORANGE:
50                 out32(GPIO0_OR,  in32(GPIO0_OR) | CONFIG_SYS_LED_GREEN | CONFIG_SYS_LED_RED);
51                 break;
52         }
53 }
54
55 static int is_monarch(void)
56 {
57         out32(GPIO0_OR,  in32(GPIO0_OR) & ~CONFIG_SYS_GPIO_RDY);
58         udelay(1000);
59
60         if (in32(GPIO0_IR) & CONFIG_SYS_MONARCH_IO)
61                 return 0;
62         else
63                 return 1;
64 }
65
66 static void wait_for_pci_ready(void)
67 {
68         /*
69          * Configure EREADY_IO as input
70          */
71         out32(GPIO0_TCR, in32(GPIO0_TCR) & ~CONFIG_SYS_EREADY_IO);
72         udelay(1000);
73
74         for (;;) {
75                 if (in32(GPIO0_IR) & CONFIG_SYS_EREADY_IO)
76                         return;
77         }
78
79 }
80
81 int board_early_init_f(void)
82 {
83         uint reg;
84
85         /*--------------------------------------------------------------------
86          * Setup the external bus controller/chip selects
87          *-------------------------------------------------------------------*/
88         mtdcr(EBC0_CFGADDR, EBC0_CFG);
89         reg = mfdcr(EBC0_CFGDATA);
90         mtdcr(EBC0_CFGDATA, reg | 0x04000000);  /* Set ATC */
91
92         /*--------------------------------------------------------------------
93          * Setup pin multiplexing (GPIO/IRQ...)
94          *-------------------------------------------------------------------*/
95         mtdcr(CPC0_GPIO, 0x03F01F80);
96
97         out32(GPIO0_ODR, 0x00000000);   /* no open drain pins      */
98         out32(GPIO0_TCR, CONFIG_SYS_GPIO_RDY | CONFIG_SYS_EREADY_IO | CONFIG_SYS_LED_RED | CONFIG_SYS_LED_GREEN);
99         out32(GPIO0_OR,  CONFIG_SYS_GPIO_RDY);
100
101         /*--------------------------------------------------------------------
102          * Setup the interrupt controller polarities, triggers, etc.
103          *-------------------------------------------------------------------*/
104         mtdcr(UIC0SR, 0xffffffff);      /* clear all */
105         mtdcr(UIC0ER, 0x00000000);      /* disable all */
106         mtdcr(UIC0CR, 0x00000001);      /* UIC1 crit is critical */
107         mtdcr(UIC0PR, 0xfffffe13);      /* per ref-board manual */
108         mtdcr(UIC0TR, 0x01c00008);      /* per ref-board manual */
109         mtdcr(UIC0VR, 0x00000001);      /* int31 highest, base=0x000 */
110         mtdcr(UIC0SR, 0xffffffff);      /* clear all */
111
112         mtdcr(UIC1SR, 0xffffffff);      /* clear all */
113         mtdcr(UIC1ER, 0x00000000);      /* disable all */
114         mtdcr(UIC1CR, 0x00000000);      /* all non-critical */
115         mtdcr(UIC1PR, 0xffffe0ff);      /* per ref-board manual */
116         mtdcr(UIC1TR, 0x00ffc000);      /* per ref-board manual */
117         mtdcr(UIC1VR, 0x00000001);      /* int31 highest, base=0x000 */
118         mtdcr(UIC1SR, 0xffffffff);      /* clear all */
119
120         return 0;
121 }
122
123 int checkboard(void)
124 {
125         char buf[64];
126         int i = getenv_f("serial#", buf, sizeof(buf));
127
128         printf("Board: P3P440");
129         if (i > 0) {
130                 puts(", serial# ");
131                 puts(buf);
132         }
133
134         if (is_monarch()) {
135                 puts(", Monarch");
136         } else {
137                 puts(", None-Monarch");
138         }
139
140         putc('\n');
141
142         return (0);
143 }
144
145 int misc_init_r (void)
146 {
147         /*
148          * Adjust flash start and offset to detected values
149          */
150         gd->bd->bi_flashstart = 0 - gd->bd->bi_flashsize;
151         gd->bd->bi_flashoffset = 0;
152
153         /*
154          * Check if only one FLASH bank is available
155          */
156         if (gd->bd->bi_flashsize != CONFIG_SYS_MAX_FLASH_BANKS * (0 - CONFIG_SYS_FLASH0)) {
157                 mtebc(PB1CR, 0);                        /* disable cs */
158                 mtebc(PB1AP, 0);
159                 mtebc(PB2CR, 0);                        /* disable cs */
160                 mtebc(PB2AP, 0);
161                 mtebc(PB3CR, 0);                        /* disable cs */
162                 mtebc(PB3AP, 0);
163         }
164
165         return 0;
166 }
167
168 /*************************************************************************
169  * Override weak is_pci_host()
170  *
171  *      This routine is called to determine if a pci scan should be
172  *      performed. With various hardware environments (especially cPCI and
173  *      PPMC) it's insufficient to depend on the state of the arbiter enable
174  *      bit in the strap register, or generic host/adapter assumptions.
175  *
176  *      Rather than hard-code a bad assumption in the general 440 code, the
177  *      440 pci code requires the board to decide at runtime.
178  *
179  *      Return 0 for adapter mode, non-zero for host (monarch) mode.
180  *
181  *
182  ************************************************************************/
183 #if defined(CONFIG_PCI)
184 int is_pci_host(struct pci_controller *hose)
185 {
186         if (is_monarch()) {
187                 wait_for_pci_ready();
188                 return 1;               /* return 1 for host controller */
189         } else {
190                 return 0;               /* return 0 for adapter controller */
191         }
192 }
193 #endif                          /* defined(CONFIG_PCI) */