diff options
| -rw-r--r-- | CHANGELOG | 6 | ||||
| -rw-r--r-- | board/incaip/memsetup.S | 131 | ||||
| -rw-r--r-- | cpu/mips/incaip_clock.c | 4 | ||||
| -rw-r--r-- | doc/README.MPC866 | 19 | ||||
| -rw-r--r-- | include/configs/TQM866M.h | 8 | ||||
| -rw-r--r-- | include/configs/bms2003.h | 1 |
6 files changed, 126 insertions, 43 deletions
@@ -2,6 +2,12 @@ Changes since U-Boot 1.0.1: ====================================================================== +* Implement adaptive SDRAM timing configuration based on actual CPU + clock frequency for INCA-IP; fix problem with board hanging when + switching from 150MHz to 100MHz + +* Add PCMCIA CS support for BMS2003 board + * Add variable CPU clock for MPC859/866 systems (so far only TQM866M): see doc/README.MPC866 for details; implement workaround for "SIU4" and "SIU9" silicon bugs on MPC866; diff --git a/board/incaip/memsetup.S b/board/incaip/memsetup.S index b43848464..10c4e840e 100644 --- a/board/incaip/memsetup.S +++ b/board/incaip/memsetup.S @@ -174,63 +174,120 @@ cgu_init: .end cgu_init - .globl memsetup - .ent memsetup -memsetup: +/* + * void sdram_init(long) + * + * a0 has the clock value + */ + .globl sdram_init + .ent sdram_init +sdram_init: - /* EBU and CGU Initialization. - */ - li a0, CPU_CLOCK_RATE - move t0, ra + li t1, MC_MODUL_BASE - /* We rely on the fact that neither ebu_init() nor cgu_init() - * modify t0 and a0. - */ - bal ebu_init + /* Disable memory controller before changing any of its registers */ + sw zero, MC_CTRLENA(t1) + + li t2, 100000000 + beq a0, t2, 1f nop - bal cgu_init + li t2, 133000000 + beq a0, t2, 2f + nop + li t2, 150000000 + beq a0, t2, 3f + nop + b 5f nop - move ra, t0 - /* SDRAM Initialization. - */ - li t0, MC_MODUL_BASE + /* 100 MHz clock */ +1: + /* Set clock ratio (clkrat=1:1, rddel=3) */ + li t2, 0x00000003 + sw t2, MC_IOGP(t1) - /* Clear Error log registers */ - sw zero, MC_ERRCAUSE(t0) - sw zero, MC_ERRADDR(t0) + /* Set sdram refresh rate (4K/64ms @ 100MHz) */ + li t2, 0x0000061A + b 4f + sw t2, MC_TREFRESH(t1) + + /* 133 MHz clock */ +2: + /* Set clock ratio (clkrat=1:1, rddel=3) */ + li t2, 0x00000003 + sw t2, MC_IOGP(t1) + + /* Set sdram refresh rate (4K/64ms @ 133MHz) */ + li t2, 0x00000822 + b 4f + sw t2, MC_TREFRESH(t1) + + /* 150 MHz clock */ +3: + /* Set clock ratio (clkrat=3:2, rddel=4) */ + li t2, 0x00000014 + sw t2, MC_IOGP(t1) + + /* Set sdram refresh rate (4K/64ms @ 150MHz) */ + li t2, 0x00000927 + sw t2, MC_TREFRESH(t1) - /* Set clock ratio to 1:1 */ - li t1, 0x03 /* clkrat=1:1, rddel=3 */ - sw t1, MC_IOGP(t0) +4: + /* Clear Error log registers */ + sw zero, MC_ERRCAUSE(t1) + sw zero, MC_ERRADDR(t1) /* Clear Power-down registers */ - sw zero, MC_SELFRFSH(t0) + sw zero, MC_SELFRFSH(t1) /* Set CAS Latency */ - li t1, 0x00000020 /* CL = 2 */ - sw t1, MC_MRSCODE(t0) + li t2, 0x00000020 /* CL = 2 */ + sw t2, MC_MRSCODE(t1) /* Set word width to 16 bit */ - li t1, 0x2 - sw t1, MC_CFGDW(t0) + li t2, 0x2 + sw t2, MC_CFGDW(t1) /* Set CS0 to SDRAM parameters */ - li t1, 0x000014C9 - sw t1, MC_CFGPB0(t0) + li t2, 0x000014C9 + sw t2, MC_CFGPB0(t1) /* Set SDRAM latency parameters */ - li t1, 0x00026325 /* BC PC100 */ - sw t1, MC_LATENCY(t0) - - /* Set SDRAM refresh rate */ - li t1, 0x00000C30 /* 4K/64ms @ 100MHz */ - sw t1, MC_TREFRESH(t0) + li t2, 0x00026325 /* BC PC100 */ + sw t2, MC_LATENCY(t1) +5: /* Finally enable the controller */ - li t1, 1 - sw t1, MC_CTRLENA(t0) + li t2, 0x00000001 + sw t2, MC_CTRLENA(t1) j ra nop + + .end sdram_init + + + .globl memsetup + .ent memsetup +memsetup: + + /* EBU, CGU and SDRAM Initialization. + */ + li a0, CPU_CLOCK_RATE + move t0, ra + + /* We rely on the fact that neither ebu_init() nor cgu_init() nor sdram_init() + * modify t0 and a0. + */ + bal cgu_init + nop + bal ebu_init + nop + bal sdram_init + nop + move ra, t0 + + j ra + nop + .end memsetup diff --git a/cpu/mips/incaip_clock.c b/cpu/mips/incaip_clock.c index 9f327594f..65ee8472d 100644 --- a/cpu/mips/incaip_clock.c +++ b/cpu/mips/incaip_clock.c @@ -101,13 +101,15 @@ int incaip_set_cpuclk (void) { extern void ebu_init(long); extern void cgu_init(long); + extern void sdram_init(long); uchar tmp[64]; ulong cpuclk; if (getenv_r ("cpuclk", tmp, sizeof (tmp)) > 0) { cpuclk = simple_strtoul (tmp, NULL, 10) * 1000000; - ebu_init (cpuclk); cgu_init (cpuclk); + ebu_init (cpuclk); + sdram_init (cpuclk); } return 0; diff --git a/doc/README.MPC866 b/doc/README.MPC866 new file mode 100644 index 000000000..1464a408c --- /dev/null +++ b/doc/README.MPC866 @@ -0,0 +1,19 @@ +The current implementation allows the user to specify the desired CPU +clock value, in MHz, via an environment variable "cpuclk". + +Three compile-time constants are used: + + CFG_866_OSCCLK - input quartz clock + CFG_866_CPUCLK_MIN - minimum allowed CPU clock + CFG_866_CPUCLK_MAX - maximum allowed CPU clock + CFG_866_CPUCLK_DEFAULT - default CPU clock value + +If the "cpuclk" environment variable value is within the CPUCLK_MIN / +CPUCLK_MAX limits, the specified value is used. Otherwise, the +default CPU clock value is set. + +Please note that for now the new clock-handling code has been enabled +for the TQM866M board only, even though it should be pretty much +common for other MPC859 / MPC866 based boards also. Our intention +here was to move in small steps and not to break the existing code +for other boards. diff --git a/include/configs/TQM866M.h b/include/configs/TQM866M.h index 31f6d735a..a5a759f2d 100644 --- a/include/configs/TQM866M.h +++ b/include/configs/TQM866M.h @@ -36,16 +36,14 @@ #define CONFIG_MPC866 1 /* This is a MPC866 CPU */ #define CONFIG_TQM866M 1 /* ...on a TQM8xxM module */ -#define CFG_866_OSCCLK 10000000 /* 10 MHz - PLL input clock */ -#define CFG_866_CPUCLK_MIN 40000000 /* 40 MHz - CPU minimum clock */ +#define CFG_866_OSCCLK 10000000 /* 10 MHz - PLL input clock */ +#define CFG_866_CPUCLK_MIN 10000000 /* 10 MHz - CPU minimum clock */ #define CFG_866_CPUCLK_MAX 133000000 /* 133 MHz - CPU maximum clock */ -#define CFG_866_CPUCLK_DEFAULT 100000000 /* 100 MHz - CPU default clock */ +#define CFG_866_CPUCLK_DEFAULT 50000000 /* 50 MHz - CPU default clock */ /* (it will be used if there is no */ /* 'cpuclk' variable with valid value) */ #define CONFIG_8xx_CONS_SMC1 1 /* Console is on SMC1 */ -#undef CONFIG_8xx_CONS_SMC2 -#undef CONFIG_8xx_CONS_NONE #define CONFIG_BAUDRATE 115200 /* console baudrate = 115kbps */ diff --git a/include/configs/bms2003.h b/include/configs/bms2003.h index 18170d443..8a76a286e 100644 --- a/include/configs/bms2003.h +++ b/include/configs/bms2003.h @@ -346,6 +346,7 @@ #define CFG_PCMCIA_ATTRB_SIZE ( 64 << 20 ) #define CFG_PCMCIA_IO_ADDR (0xEC100000) #define CFG_PCMCIA_IO_SIZE ( 64 << 20 ) +#define PCMCIA_MEM_WIN_NO 5 #define NSCU_OE_INV 1 /* PCMCIA_GCRX_CXOE is inverted */ #endif |