3 * Tolunay Orkun, Nextio Inc., torkun@nextio.com
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 <asm/ppc4xx-emac.h>
30 void sdram_init(void);
33 * Configuration data for AMIS FS6377-01 Programmable 3-PLL Clock Generator
35 * CLKA output => Epson LCD Controller
36 * CLKB output => Not Connected
37 * CLKC output => Ethernet
38 * CLKD output => UART external clock
40 * Note: these values are obtained from device after init by micromonitor
42 uchar pll_fs6377_regs[16] = {
43 0x28, 0xef, 0x53, 0x03, 0x4b, 0x80, 0x32, 0x80,
44 0x94, 0x32, 0x80, 0xd4, 0x56, 0xf6, 0xf6, 0xe0 };
47 * pll_init: Initialize AMIS IC FS6377-01 PLL
49 * PLL supplies Epson LCD Clock, Ethernet Clock and UART external clock
54 i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
56 return i2c_write(CONFIG_SYS_I2C_PLL_ADDR, 0, 1,
57 (uchar *) pll_fs6377_regs, sizeof(pll_fs6377_regs));
61 * board_early_init_f: do early board initialization
64 int board_early_init_f(void)
66 /* initialize PLL so UART, LCD, Ethernet clocked at correctly */
70 /*-------------------------------------------------------------------------+
71 | Interrupt controller setup for the Walnut board.
72 | Note: IRQ 0-15 405GP internally generated; active high; level sensitive
73 | IRQ 16 405GP internally generated; active low; level sensitive
75 | IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
76 | IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
77 | IRQ 27 (EXT IRQ 2) Not Used
78 | IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
79 | IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
80 | IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
81 | IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
82 | Note for Walnut board:
83 | An interrupt taken for the FPGA (IRQ 25) indicates that either
84 | the Mouse, Keyboard, IRDA, or External Expansion caused the
85 | interrupt. The FPGA must be read to determine which device
86 | caused the interrupt. The default setting of the FPGA clears
88 +-------------------------------------------------------------------------*/
90 mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
91 mtdcr (UIC0ER, 0x00000000); /* disable all ints */
92 mtdcr (UIC0CR, 0x00000000); /* set all to be non-critical */
93 mtdcr (UIC0PR, 0xFFFFFF83); /* set int polarities */
94 mtdcr (UIC0TR, 0x10000000); /* set int trigger levels */
95 mtdcr (UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
96 mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
98 mtebc (EBC0_CFG, 0xa8400000); /* EBC always driven */
100 return 0; /* success */
104 * checkboard: identify/verify the board we are running
106 * Remark: we just assume it is correct board here!
111 printf("BOARD: Cogent CSB272\n");
113 return 0; /* success */
117 * initram: Determine the size of mounted DRAM
119 * Size is determined by reading SDRAM configuration registers as
120 * configured by initialization code
123 phys_size_t initdram (int board_type)
130 * ToDo: Move the asm init routine sdram_init() to this C file,
131 * or even better use some common ppc4xx code available
132 * in arch/powerpc/cpu/ppc4xx
138 mtdcr (SDRAM0_CFGADDR, SDRAM0_B0CR);
139 tmp = mfdcr (SDRAM0_CFGDATA);
140 if (tmp & 0x00000001) {
141 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
142 tot_size += bank_size;
145 mtdcr (SDRAM0_CFGADDR, SDRAM0_B1CR);
146 tmp = mfdcr (SDRAM0_CFGDATA);
147 if (tmp & 0x00000001) {
148 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
149 tot_size += bank_size;
152 mtdcr (SDRAM0_CFGADDR, SDRAM0_B2CR);
153 tmp = mfdcr (SDRAM0_CFGDATA);
154 if (tmp & 0x00000001) {
155 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
156 tot_size += bank_size;
159 mtdcr (SDRAM0_CFGADDR, SDRAM0_B3CR);
160 tmp = mfdcr (SDRAM0_CFGDATA);
161 if (tmp & 0x00000001) {
162 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
163 tot_size += bank_size;
170 * last_stage_init: final configurations (such as PHY etc)
173 int last_stage_init(void)
175 /* initialize the PHY */
176 miiphy_reset("ppc_4xx_eth0", CONFIG_PHY_ADDR);
179 miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_BMCR,
180 BMCR_ANENABLE | BMCR_ANRESTART);
183 miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_NWAYTEST, 0x0d08);
186 return 0; /* success */