diff options
Diffstat (limited to 'board/netstal/hcu4/hcu4.c')
| -rw-r--r-- | board/netstal/hcu4/hcu4.c | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/board/netstal/hcu4/hcu4.c b/board/netstal/hcu4/hcu4.c new file mode 100644 index 0000000000..2b9560484d --- /dev/null +++ b/board/netstal/hcu4/hcu4.c @@ -0,0 +1,400 @@ +/* + *(C) Copyright 2005-2007 Netstal Maschinen AG + * Niklaus Giger (Niklaus.Giger@netstal.com) + * + * This source code is free software; you can redistribute it + * and/or modify it in source code form under the terms of the GNU + * General Public License as published by the Free Software + * Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#include <common.h> +#include <ppc4xx.h> +#include <asm/processor.h> +#include <asm/io.h> +#include <asm-ppc/u-boot.h> +#include "../common/nm_bsp.c" + +DECLARE_GLOBAL_DATA_PTR; + +#define HCU_MACH_VERSIONS_REGISTER (0x7C000000 + 0xF00000) + +#define SDRAM_LEN 32*1024*1024 /* 32 MB -RAM */ + +#define DO_UGLY_SDRAM_WORKAROUND + +enum { + /* HW_GENERATION_HCU wird nicht mehr unterstuetzt */ + HW_GENERATION_HCU2 = 0x10, + HW_GENERATION_HCU3 = 0x10, + HW_GENERATION_HCU4 = 0x20, + HW_GENERATION_MCU = 0x08, + HW_GENERATION_MCU20 = 0x0a, + HW_GENERATION_MCU25 = 0x09, +}; + +void sysLedSet(u32 value); +long int spd_sdram(int(read_spd)(uint addr)); + +#ifdef CONFIG_SPD_EEPROM +#define DEBUG +#endif + +#if defined(DEBUG) +void show_sdram_registers(void); +#endif + +/* + * This function is run very early, out of flash, and before devices are + * initialized. It is called by lib_ppc/board.c:board_init_f by virtue + * of being in the init_sequence array. + * + * The SDRAM has been initialized already -- start.S:start called + * init.S:init_sdram early on -- but it is not yet being used for + * anything, not even stack. So be careful. + */ + +#define CPC0_CR0 0xb1 /* Chip control register 0 */ +#define CPC0_CR1 0xb2 /* Chip control register 1 */ +/* Attention: If you want 1 microsecs times from the external oscillator + * use 0x00804051. But this causes problems with u-boot and linux! + */ +#define CPC0_CR1_VALUE 0x00004051 +#define CPC0_ECR 0xaa /* Edge condition register */ +#define EBC0_CFG 0x23 /* External Peripheral Control Register */ +#define CPC0_EIRR 0xb6 /* External Interrupt Register */ + + +int board_early_init_f (void) +{ + /*-------------------------------------------------------------------+ + | Interrupt controller setup for the HCU4 board. + | Note: IRQ 0-15 405GP internally generated; high; level sensitive + | IRQ 16 405GP internally generated; low; level sensitive + | IRQ 17-24 RESERVED/UNUSED + | IRQ 31 (EXT IRQ 6) (unused) + +-------------------------------------------------------------------*/ + mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */ + mtdcr (uicer, 0x00000000); /* disable all ints */ + mtdcr (uiccr, 0x00000000); /* set all to be non-critical */ + mtdcr (uicpr, 0xFFFFFF87); /* set int polarities */ + mtdcr (uictr, 0x10000000); /* set int trigger levels */ + mtdcr (uicsr, 0xFFFFFFFF); /* clear all ints */ + + mtdcr(CPC0_CR1, CPC0_CR1_VALUE); + mtdcr(CPC0_ECR, 0x60606000); + mtdcr(CPC0_EIRR, 0x7c000000); + + return 0; +} + +#ifdef CONFIG_BOARD_PRE_INIT +int board_pre_init (void) +{ + return board_early_init_f (); +} +#endif + +int checkboard (void) +{ + unsigned int j; + u16 *boardVersReg = (u16 *) HCU_MACH_VERSIONS_REGISTER; + u16 generation = *boardVersReg & 0xf0; + u16 index = *boardVersReg & 0x0f; + + /* Force /RTS to active. The board it not wired quite + correctly to use cts/rtc flow control, so just force the + /RST active and forget about it. */ + writeb (readb (0xef600404) | 0x03, 0xef600404); + printf ("\nNetstal Maschinen AG "); + if (generation == HW_GENERATION_HCU3) + printf ("HCU3: index %d\n\n", index); + else if (generation == HW_GENERATION_HCU4) + printf ("HCU4: index %d\n\n", index); + /* GPIO here noch nicht richtig initialisert !!! */ + sysLedSet(0); + for (j = 0; j < 7; j++) { + sysLedSet(1 << j); + udelay(50 * 1000); + } + + return 0; +} + +u32 sysLedGet(void) +{ + return (~((*(u32 *)GPIO0_OR)) >> 23) & 0xff; +} + +void sysLedSet(u32 value /* value to place in LEDs */) +{ + u32 tmp = ~value; + u32 *ledReg; + + tmp = (tmp << 23) | 0x7FFFFF; + ledReg = (u32 *)GPIO0_OR; + *ledReg = tmp; +} + +/* + * sdram_init - Dummy implementation for start.S, spd_sdram or initdram + * used for HCUx + */ +void sdram_init(void) +{ + return; +} + +#if defined(DEBUG) +void show_sdram_registers(void) +{ + u32 value; + + printf ("SDRAM Controller Registers --\n"); + mfsdram(mem_mcopt1, value); + printf (" SDRAM0_CFG : 0x%08x\n", value); + mfsdram(mem_status, value); + printf (" SDRAM0_STATUS: 0x%08x\n", value); + mfsdram(mem_mb0cf, value); + printf (" SDRAM0_B0CR : 0x%08x\n", value); + mfsdram(mem_mb1cf, value); + printf (" SDRAM0_B1CR : 0x%08x\n", value); + mfsdram(mem_sdtr1, value); + printf (" SDRAM0_TR : 0x%08x\n", value); + mfsdram(mem_rtr, value); + printf (" SDRAM0_RTR : 0x%08x\n", value); +} +#endif + +/* + * this is even after checkboard. It returns the size of the SDRAM + * that we have installed. This function is called by board_init_f + * in lib_ppc/board.c to initialize the memory and return what I + * found. These are default value, which will be overridden later. + */ + +long int fixed_hcu4_sdram (int board_type) +{ +#ifdef DEBUG + printf (__FUNCTION__); +#endif + /* disable memory controller */ + mtdcr (memcfga, mem_mcopt1); + mtdcr (memcfgd, 0x00000000); + + udelay (500); + + /* Clear SDRAM0_BESR0 (Bus Error Syndrome Register) */ + mtdcr (memcfga, mem_besra); + mtdcr (memcfgd, 0xffffffff); + + /* Clear SDRAM0_BESR1 (Bus Error Syndrome Register) */ + mtdcr (memcfga, mem_besrb); + mtdcr (memcfgd, 0xffffffff); + + /* Clear SDRAM0_ECCCFG (disable ECC) */ + mtdcr (memcfga, mem_ecccf); + mtdcr (memcfgd, 0x00000000); + + /* Clear SDRAM0_ECCESR (ECC Error Syndrome Register) */ + mtdcr (memcfga, mem_eccerr); + mtdcr (memcfgd, 0xffffffff); + + /* Timing register: CASL=2, PTA=2, CTP=2, LDF=1, RFTA=5, RCD=2 + * TODO ngngng + */ + mtdcr (memcfga, mem_sdtr1); + mtdcr (memcfgd, 0x008a4015); + + /* Memory Bank 0 Config == BA=0x00000000, SZ=64M, AM=3, BE=1 + * TODO ngngng + */ + mtdcr (memcfga, mem_mb0cf); + mtdcr (memcfgd, 0x00062001); + + /* refresh timer = 0x400 */ + mtdcr (memcfga, mem_rtr); + mtdcr (memcfgd, 0x04000000); + + /* Power management idle timer set to the default. */ + mtdcr (memcfga, mem_pmit); + mtdcr (memcfgd, 0x07c00000); + + udelay (500); + + /* Enable banks (DCE=1, BPRF=1, ECCDD=1, EMDUL=1) TODO */ + mtdcr (memcfga, mem_mcopt1); + mtdcr (memcfgd, 0x90800000); + +#ifdef DEBUG + printf ("%s: done\n", __FUNCTION__); +#endif + return SDRAM_LEN; +} + +/*---------------------------------------------------------------------------+ + * getSerialNr + *---------------------------------------------------------------------------*/ +static u32 getSerialNr(void) +{ + u32 *serial = (u32 *)CFG_FLASH_BASE; + + if (*serial == 0xffffffff) + return get_ticks(); + + return *serial; +} + + +/*---------------------------------------------------------------------------+ + * misc_init_r. + *---------------------------------------------------------------------------*/ + +int misc_init_r(void) +{ + char *s = getenv("ethaddr"); + char *e; + int i; + u32 serial = getSerialNr(); + + for (i = 0; i < 6; ++i) { + gd->bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0; + if (s) + s = (*e) ? e + 1 : e; + } + + if (gd->bd->bi_enetaddr[3] == 0 && + gd->bd->bi_enetaddr[4] == 0 && + gd->bd->bi_enetaddr[5] == 0) { + char ethaddr[22]; + /* [0..3] Must be in sync with CONFIG_ETHADDR */ + gd->bd->bi_enetaddr[0] = 0x00; + gd->bd->bi_enetaddr[1] = 0x60; + gd->bd->bi_enetaddr[2] = 0x13; + gd->bd->bi_enetaddr[3] = (serial >> 16) & 0xff; + gd->bd->bi_enetaddr[4] = (serial >> 8) & 0xff; + gd->bd->bi_enetaddr[5] = (serial >> 0) & 0xff; + sprintf (ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X\0", + gd->bd->bi_enetaddr[0], gd->bd->bi_enetaddr[1], + gd->bd->bi_enetaddr[2], gd->bd->bi_enetaddr[3], + gd->bd->bi_enetaddr[4], gd->bd->bi_enetaddr[5]) ; + printf("%s: Setting eth %s serial 0x%x\n", __FUNCTION__, + ethaddr, serial); + setenv ("ethaddr", ethaddr); + } + return 0; +} + +#ifdef DO_UGLY_SDRAM_WORKAROUND +#include "i2c.h" + +void set_spd_default_value(unsigned int spd_addr,uchar def_val) +{ + uchar value; + int res = i2c_read(SPD_EEPROM_ADDRESS, spd_addr, 1, &value, 1) ; + + if (res == 0 && value == 0xff) { + res = i2c_write(SPD_EEPROM_ADDRESS, + spd_addr, 1, &def_val, 1) ; +#ifdef DEBUG + printf("%s: Setting spd offset %3d to %3d res %d\n", + __FUNCTION__, spd_addr, def_val, res); +#endif + } +} +#endif + +long int initdram(int board_type) +{ + long dram_size = 0; + +#if !defined(CONFIG_SPD_EEPROM) + dram_size = fixed_hcu4_sdram(); +#else +#ifdef DO_UGLY_SDRAM_WORKAROUND + /* Workaround if you have no working I2C-EEPROM-SPD-configuration */ + i2c_init(CFG_I2C_SPEED, CFG_I2C_SLAVE); + set_spd_default_value(2, 4); /* SDRAM Type */ + set_spd_default_value(7, 0); /* module width, high byte */ + set_spd_default_value(12, 1); /* Refresh or 0x81 */ + + /* Only correct for HCU3 with 32 MB RAM*/ + /* Number of bytes used by module manufacturer */ + set_spd_default_value( 0, 128); + set_spd_default_value( 1, 11 ); /* Total SPD memory size */ + set_spd_default_value( 2, 4 ); /* Memory type */ + set_spd_default_value( 3, 12 ); /* Number of row address bits */ + set_spd_default_value( 4, 9 ); /* Number of column address bits */ + set_spd_default_value( 5, 1 ); /* Number of module rows */ + set_spd_default_value( 6, 32 ); /* Module data width, LSB */ + set_spd_default_value( 7, 0 ); /* Module data width, MSB */ + set_spd_default_value( 8, 1 ); /* Module interface signal levels */ + /* SDRAM cycle time for highest CL (Tclk) */ + set_spd_default_value( 9, 112); + /* SDRAM access time from clock for highest CL (Tac) */ + set_spd_default_value(10, 84 ); + set_spd_default_value(11, 2 ); /* Module configuration type */ + set_spd_default_value(12, 128); /* Refresh rate/type */ + set_spd_default_value(13, 16 ); /* Primary SDRAM width */ + set_spd_default_value(14, 8 ); /* Error Checking SDRAM width */ + /* SDRAM device attributes, min clock delay for back to back */ + /*random column addresses (Tccd) */ + set_spd_default_value(15, 1 ); + /* SDRAM device attributes, burst lengths supported */ + set_spd_default_value(16, 143); + /* SDRAM device attributes, number of banks on SDRAM device */ + set_spd_default_value(17, 4 ); + /* SDRAM device attributes, CAS latency */ + set_spd_default_value(18, 6 ); + /* SDRAM device attributes, CS latency */ + set_spd_default_value(19, 1 ); + /* SDRAM device attributes, WE latency */ + set_spd_default_value(20, 1 ); + set_spd_default_value(21, 0 ); /* SDRAM module attributes */ + /* SDRAM device attributes, general */ + set_spd_default_value(22, 14 ); + /* SDRAM cycle time for 2nd highest CL (Tclk) */ + set_spd_default_value(23, 117); + /* SDRAM access time from clock for2nd highest CL (Tac) */ + set_spd_default_value(24, 84 ); + /* SDRAM cycle time for 3rd highest CL (Tclk) */ + set_spd_default_value(25, 0 ); + /* SDRAM access time from clock for3rd highest CL (Tac) */ + set_spd_default_value(26, 0 ); + set_spd_default_value(27, 15 ); /* Minimum row precharge time (Trp) */ + /* Minimum row active to row active delay (Trrd) */ + set_spd_default_value(28, 14 ); + set_spd_default_value(29, 15 ); /* Minimum CAS to RAS delay (Trcd) */ + set_spd_default_value(30, 37 ); /* Minimum RAS pulse width (Tras) */ + set_spd_default_value(31, 8 ); /* Module bank density */ + /* Command and Address signal input setup time */ + set_spd_default_value(32, 21 ); + /* Command and Address signal input hold time */ + set_spd_default_value(33, 8 ); + set_spd_default_value(34, 21 ); /* Data signal input setup time */ + set_spd_default_value(35, 8 ); /* Data signal input hold time */ +#endif /* DO_UGLY_SDRAM_WORKAROUND */ + dram_size = spd_sdram(0); +#endif + +#ifdef DEBUG + show_sdram_registers(); +#endif + +#if defined(CFG_DRAM_TEST) + bcu4_testdram(dram_size); + printf("%s %d MB of SDRAM\n", __FUNCTION__, dram_size/(1024*1024)); +#endif + + return dram_size; +} |