diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/txx9/rbtx4927/setup.c | 98 |
1 files changed, 49 insertions, 49 deletions
diff --git a/arch/mips/txx9/rbtx4927/setup.c b/arch/mips/txx9/rbtx4927/setup.c index c3566c39c26..bba6ef9db06 100644 --- a/arch/mips/txx9/rbtx4927/setup.c +++ b/arch/mips/txx9/rbtx4927/setup.c @@ -252,55 +252,6 @@ static void __init rbtx4927_mem_setup(void) set_io_port_base(KSEG1 + RBTX4927_ISA_IO_OFFSET); #endif - /* - * ASSUMPTION: PCIDIVMODE is configured for PCI 33MHz or 66MHz. - * - * For TX4927: - * PCIDIVMODE[12:11]'s initial value is given by S9[4:3] (ON:0, OFF:1). - * CPU 166MHz: PCI 66MHz : PCIDIVMODE: 00 (1/2.5) - * CPU 200MHz: PCI 66MHz : PCIDIVMODE: 01 (1/3) - * CPU 166MHz: PCI 33MHz : PCIDIVMODE: 10 (1/5) - * CPU 200MHz: PCI 33MHz : PCIDIVMODE: 11 (1/6) - * i.e. S9[3]: ON (83MHz), OFF (100MHz) - * - * For TX4937: - * PCIDIVMODE[12:11]'s initial value is given by S1[5:4] (ON:0, OFF:1) - * PCIDIVMODE[10] is 0. - * CPU 266MHz: PCI 33MHz : PCIDIVMODE: 000 (1/8) - * CPU 266MHz: PCI 66MHz : PCIDIVMODE: 001 (1/4) - * CPU 300MHz: PCI 33MHz : PCIDIVMODE: 010 (1/9) - * CPU 300MHz: PCI 66MHz : PCIDIVMODE: 011 (1/4.5) - * CPU 333MHz: PCI 33MHz : PCIDIVMODE: 100 (1/10) - * CPU 333MHz: PCI 66MHz : PCIDIVMODE: 101 (1/5) - * - */ - if (mips_machtype == MACH_TOSHIBA_RBTX4937) - switch ((unsigned long)__raw_readq(&tx4938_ccfgptr->ccfg) & - TX4938_CCFG_PCIDIVMODE_MASK) { - case TX4938_CCFG_PCIDIVMODE_8: - case TX4938_CCFG_PCIDIVMODE_4: - txx9_cpu_clock = 266666666; /* 266MHz */ - break; - case TX4938_CCFG_PCIDIVMODE_9: - case TX4938_CCFG_PCIDIVMODE_4_5: - txx9_cpu_clock = 300000000; /* 300MHz */ - break; - default: - txx9_cpu_clock = 333333333; /* 333MHz */ - } - else - switch ((unsigned long)__raw_readq(&tx4927_ccfgptr->ccfg) & - TX4927_CCFG_PCIDIVMODE_MASK) { - case TX4927_CCFG_PCIDIVMODE_2_5: - case TX4927_CCFG_PCIDIVMODE_5: - txx9_cpu_clock = 166666666; /* 166MHz */ - break; - default: - txx9_cpu_clock = 200000000; /* 200MHz */ - } - /* change default value to udelay/mdelay take reasonable time */ - loops_per_jiffy = txx9_cpu_clock / HZ / 2; - /* CCFG */ /* do reset on watchdog */ tx4927_ccfg_set(TX4927_CCFG_WR); @@ -349,6 +300,55 @@ static void __init rbtx4927_mem_setup(void) static void __init rbtx4927_time_init(void) { + /* + * ASSUMPTION: PCIDIVMODE is configured for PCI 33MHz or 66MHz. + * + * For TX4927: + * PCIDIVMODE[12:11]'s initial value is given by S9[4:3] (ON:0, OFF:1). + * CPU 166MHz: PCI 66MHz : PCIDIVMODE: 00 (1/2.5) + * CPU 200MHz: PCI 66MHz : PCIDIVMODE: 01 (1/3) + * CPU 166MHz: PCI 33MHz : PCIDIVMODE: 10 (1/5) + * CPU 200MHz: PCI 33MHz : PCIDIVMODE: 11 (1/6) + * i.e. S9[3]: ON (83MHz), OFF (100MHz) + * + * For TX4937: + * PCIDIVMODE[12:11]'s initial value is given by S1[5:4] (ON:0, OFF:1) + * PCIDIVMODE[10] is 0. + * CPU 266MHz: PCI 33MHz : PCIDIVMODE: 000 (1/8) + * CPU 266MHz: PCI 66MHz : PCIDIVMODE: 001 (1/4) + * CPU 300MHz: PCI 33MHz : PCIDIVMODE: 010 (1/9) + * CPU 300MHz: PCI 66MHz : PCIDIVMODE: 011 (1/4.5) + * CPU 333MHz: PCI 33MHz : PCIDIVMODE: 100 (1/10) + * CPU 333MHz: PCI 66MHz : PCIDIVMODE: 101 (1/5) + */ + if (mips_machtype == MACH_TOSHIBA_RBTX4937) + switch ((unsigned long)__raw_readq(&tx4938_ccfgptr->ccfg) & + TX4938_CCFG_PCIDIVMODE_MASK) { + case TX4938_CCFG_PCIDIVMODE_8: + case TX4938_CCFG_PCIDIVMODE_4: + txx9_cpu_clock = 266666666; /* 266MHz */ + break; + case TX4938_CCFG_PCIDIVMODE_9: + case TX4938_CCFG_PCIDIVMODE_4_5: + txx9_cpu_clock = 300000000; /* 300MHz */ + break; + default: + txx9_cpu_clock = 333333333; /* 333MHz */ + } + else + switch ((unsigned long)__raw_readq(&tx4927_ccfgptr->ccfg) & + TX4927_CCFG_PCIDIVMODE_MASK) { + case TX4927_CCFG_PCIDIVMODE_2_5: + case TX4927_CCFG_PCIDIVMODE_5: + txx9_cpu_clock = 166666666; /* 166MHz */ + break; + default: + txx9_cpu_clock = 200000000; /* 200MHz */ + } + + /* change default value to udelay/mdelay take reasonable time */ + loops_per_jiffy = txx9_cpu_clock / HZ / 2; + mips_hpt_frequency = txx9_cpu_clock / 2; if (____raw_readq(&tx4927_ccfgptr->ccfg) & TX4927_CCFG_TINTDIS) txx9_clockevent_init(TX4927_TMR_REG(0) & 0xfffffffffULL, |