5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 #include <asm/processor.h>
28 #include <ppc4xx_enet.h>
30 void sdram_init(void);
33 * board_early_init_f: do early board initialization
36 int board_early_init_f(void)
38 /*-------------------------------------------------------------------------+
39 | Interrupt controller setup for the Walnut board.
40 | Note: IRQ 0-15 405GP internally generated; active high; level sensitive
41 | IRQ 16 405GP internally generated; active low; level sensitive
43 | IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
44 | IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
45 | IRQ 27 (EXT IRQ 2) Not Used
46 | IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
47 | IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
48 | IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
49 | IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
50 | Note for Walnut board:
51 | An interrupt taken for the FPGA (IRQ 25) indicates that either
52 | the Mouse, Keyboard, IRDA, or External Expansion caused the
53 | interrupt. The FPGA must be read to determine which device
54 | caused the interrupt. The default setting of the FPGA clears
56 +-------------------------------------------------------------------------*/
58 mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */
59 mtdcr (uicer, 0x00000000); /* disable all ints */
60 mtdcr (uiccr, 0x00000000); /* set all to be non-critical */
61 mtdcr (uicpr, 0xFFFFFF83); /* set int polarities */
62 mtdcr (uictr, 0x10000000); /* set int trigger levels */
63 mtdcr (uicvcr, 0x00000001); /* set vect base=0,INT0 highest priority */
64 mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */
66 mtebc (EBC0_CFG, 0xa8400000); /* EBC always driven */
68 return 0; /* success */
72 * checkboard: identify/verify the board we are running
74 * Remark: we just assume it is correct board here!
79 printf("BOARD: Cogent CSB472\n");
81 return 0; /* success */
85 * initram: Determine the size of mounted DRAM
87 * Size is determined by reading SDRAM configuration registers as
88 * configured by initialization code
91 phys_size_t initdram (int board_type)
98 * ToDo: Move the asm init routine sdram_init() to this C file,
99 * or even better use some common ppc4xx code available
106 mtdcr (SDRAM0_CFGADDR, mem_mb0cf);
107 tmp = mfdcr (SDRAM0_CFGDATA);
108 if (tmp & 0x00000001) {
109 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
110 tot_size += bank_size;
113 mtdcr (SDRAM0_CFGADDR, mem_mb1cf);
114 tmp = mfdcr (SDRAM0_CFGDATA);
115 if (tmp & 0x00000001) {
116 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
117 tot_size += bank_size;
120 mtdcr (SDRAM0_CFGADDR, mem_mb2cf);
121 tmp = mfdcr (SDRAM0_CFGDATA);
122 if (tmp & 0x00000001) {
123 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
124 tot_size += bank_size;
127 mtdcr (SDRAM0_CFGADDR, mem_mb3cf);
128 tmp = mfdcr (SDRAM0_CFGDATA);
129 if (tmp & 0x00000001) {
130 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
131 tot_size += bank_size;
138 * last_stage_init: final configurations (such as PHY etc)
141 int last_stage_init(void)
143 /* initialize the PHY */
144 miiphy_reset("ppc_4xx_eth0", CONFIG_PHY_ADDR);
147 miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, PHY_BMCR,
148 PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
151 miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, PHY_FCSCR, 0x0d08);
153 return 0; /* success */