3 * Tolunay Orkun, Nextio Inc., torkun@nextio.com
5 * SPDX-License-Identifier: GPL-2.0+
9 #include <asm/processor.h>
12 #include <asm/ppc4xx-emac.h>
14 void sdram_init(void);
17 * Configuration data for AMIS FS6377-01 Programmable 3-PLL Clock Generator
19 * CLKA output => Epson LCD Controller
20 * CLKB output => Not Connected
21 * CLKC output => Ethernet
22 * CLKD output => UART external clock
24 * Note: these values are obtained from device after init by micromonitor
26 uchar pll_fs6377_regs[16] = {
27 0x28, 0xef, 0x53, 0x03, 0x4b, 0x80, 0x32, 0x80,
28 0x94, 0x32, 0x80, 0xd4, 0x56, 0xf6, 0xf6, 0xe0 };
31 * pll_init: Initialize AMIS IC FS6377-01 PLL
33 * PLL supplies Epson LCD Clock, Ethernet Clock and UART external clock
40 return i2c_write(CONFIG_SYS_I2C_PLL_ADDR, 0, 1,
41 (uchar *) pll_fs6377_regs, sizeof(pll_fs6377_regs));
45 * board_early_init_f: do early board initialization
48 int board_early_init_f(void)
50 /* initialize PLL so UART, LCD, Ethernet clocked at correctly */
54 /*-------------------------------------------------------------------------+
55 | Interrupt controller setup for the Walnut board.
56 | Note: IRQ 0-15 405GP internally generated; active high; level sensitive
57 | IRQ 16 405GP internally generated; active low; level sensitive
59 | IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
60 | IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
61 | IRQ 27 (EXT IRQ 2) Not Used
62 | IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
63 | IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
64 | IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
65 | IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
66 | Note for Walnut board:
67 | An interrupt taken for the FPGA (IRQ 25) indicates that either
68 | the Mouse, Keyboard, IRDA, or External Expansion caused the
69 | interrupt. The FPGA must be read to determine which device
70 | caused the interrupt. The default setting of the FPGA clears
72 +-------------------------------------------------------------------------*/
74 mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
75 mtdcr (UIC0ER, 0x00000000); /* disable all ints */
76 mtdcr (UIC0CR, 0x00000000); /* set all to be non-critical */
77 mtdcr (UIC0PR, 0xFFFFFF83); /* set int polarities */
78 mtdcr (UIC0TR, 0x10000000); /* set int trigger levels */
79 mtdcr (UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
80 mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
82 mtebc (EBC0_CFG, 0xa8400000); /* EBC always driven */
84 return 0; /* success */
88 * checkboard: identify/verify the board we are running
90 * Remark: we just assume it is correct board here!
95 printf("BOARD: Cogent CSB272\n");
97 return 0; /* success */
101 * initram: Determine the size of mounted DRAM
103 * Size is determined by reading SDRAM configuration registers as
104 * configured by initialization code
107 phys_size_t initdram (int board_type)
114 * ToDo: Move the asm init routine sdram_init() to this C file,
115 * or even better use some common ppc4xx code available
116 * in arch/powerpc/cpu/ppc4xx
122 mtdcr (SDRAM0_CFGADDR, SDRAM0_B0CR);
123 tmp = mfdcr (SDRAM0_CFGDATA);
124 if (tmp & 0x00000001) {
125 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
126 tot_size += bank_size;
129 mtdcr (SDRAM0_CFGADDR, SDRAM0_B1CR);
130 tmp = mfdcr (SDRAM0_CFGDATA);
131 if (tmp & 0x00000001) {
132 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
133 tot_size += bank_size;
136 mtdcr (SDRAM0_CFGADDR, SDRAM0_B2CR);
137 tmp = mfdcr (SDRAM0_CFGDATA);
138 if (tmp & 0x00000001) {
139 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
140 tot_size += bank_size;
143 mtdcr (SDRAM0_CFGADDR, SDRAM0_B3CR);
144 tmp = mfdcr (SDRAM0_CFGDATA);
145 if (tmp & 0x00000001) {
146 bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
147 tot_size += bank_size;
154 * last_stage_init: final configurations (such as PHY etc)
157 int last_stage_init(void)
159 /* initialize the PHY */
160 miiphy_reset("ppc_4xx_eth0", CONFIG_PHY_ADDR);
163 miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_BMCR,
164 BMCR_ANENABLE | BMCR_ANRESTART);
167 miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_NWAYTEST, 0x0d08);
170 return 0; /* success */