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Diffstat (limited to 'arch/mips/bcm63xx/cpu.c')
| -rw-r--r-- | arch/mips/bcm63xx/cpu.c | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/arch/mips/bcm63xx/cpu.c b/arch/mips/bcm63xx/cpu.c new file mode 100644 index 000000000..307ec8b8e --- /dev/null +++ b/arch/mips/bcm63xx/cpu.c @@ -0,0 +1,385 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr> + * Copyright (C) 2009 Florian Fainelli <florian@openwrt.org> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/cpu.h> +#include <asm/cpu.h> +#include <asm/cpu-info.h> +#include <asm/mipsregs.h> +#include <bcm63xx_cpu.h> +#include <bcm63xx_regs.h> +#include <bcm63xx_io.h> +#include <bcm63xx_irq.h> + +const unsigned long *bcm63xx_regs_base; +EXPORT_SYMBOL(bcm63xx_regs_base); + +const int *bcm63xx_irqs; +EXPORT_SYMBOL(bcm63xx_irqs); + +u16 bcm63xx_cpu_id __read_mostly; +EXPORT_SYMBOL(bcm63xx_cpu_id); + +static u8 bcm63xx_cpu_rev; +static unsigned int bcm63xx_cpu_freq; +static unsigned int bcm63xx_memory_size; + +static const unsigned long bcm3368_regs_base[] = { + __GEN_CPU_REGS_TABLE(3368) +}; + +static const int bcm3368_irqs[] = { + __GEN_CPU_IRQ_TABLE(3368) +}; + +static const unsigned long bcm6328_regs_base[] = { + __GEN_CPU_REGS_TABLE(6328) +}; + +static const int bcm6328_irqs[] = { + __GEN_CPU_IRQ_TABLE(6328) +}; + +static const unsigned long bcm6338_regs_base[] = { + __GEN_CPU_REGS_TABLE(6338) +}; + +static const int bcm6338_irqs[] = { + __GEN_CPU_IRQ_TABLE(6338) +}; + +static const unsigned long bcm6345_regs_base[] = { + __GEN_CPU_REGS_TABLE(6345) +}; + +static const int bcm6345_irqs[] = { + __GEN_CPU_IRQ_TABLE(6345) +}; + +static const unsigned long bcm6348_regs_base[] = { + __GEN_CPU_REGS_TABLE(6348) +}; + +static const int bcm6348_irqs[] = { + __GEN_CPU_IRQ_TABLE(6348) + +}; + +static const unsigned long bcm6358_regs_base[] = { + __GEN_CPU_REGS_TABLE(6358) +}; + +static const int bcm6358_irqs[] = { + __GEN_CPU_IRQ_TABLE(6358) + +}; + +static const unsigned long bcm6362_regs_base[] = { + __GEN_CPU_REGS_TABLE(6362) +}; + +static const int bcm6362_irqs[] = { + __GEN_CPU_IRQ_TABLE(6362) + +}; + +static const unsigned long bcm6368_regs_base[] = { + __GEN_CPU_REGS_TABLE(6368) +}; + +static const int bcm6368_irqs[] = { + __GEN_CPU_IRQ_TABLE(6368) + +}; + +u8 bcm63xx_get_cpu_rev(void) +{ + return bcm63xx_cpu_rev; +} + +EXPORT_SYMBOL(bcm63xx_get_cpu_rev); + +unsigned int bcm63xx_get_cpu_freq(void) +{ + return bcm63xx_cpu_freq; +} + +unsigned int bcm63xx_get_memory_size(void) +{ + return bcm63xx_memory_size; +} + +static unsigned int detect_cpu_clock(void) +{ + u16 cpu_id = bcm63xx_get_cpu_id(); + + switch (cpu_id) { + case BCM3368_CPU_ID: + return 300000000; + + case BCM6328_CPU_ID: + { + unsigned int tmp, mips_pll_fcvo; + + tmp = bcm_misc_readl(MISC_STRAPBUS_6328_REG); + mips_pll_fcvo = (tmp & STRAPBUS_6328_FCVO_MASK) + >> STRAPBUS_6328_FCVO_SHIFT; + + switch (mips_pll_fcvo) { + case 0x12: + case 0x14: + case 0x19: + return 160000000; + case 0x1c: + return 192000000; + case 0x13: + case 0x15: + return 200000000; + case 0x1a: + return 384000000; + case 0x16: + return 400000000; + default: + return 320000000; + } + + } + case BCM6338_CPU_ID: + /* BCM6338 has a fixed 240 Mhz frequency */ + return 240000000; + + case BCM6345_CPU_ID: + /* BCM6345 has a fixed 140Mhz frequency */ + return 140000000; + + case BCM6348_CPU_ID: + { + unsigned int tmp, n1, n2, m1; + + /* 16MHz * (N1 + 1) * (N2 + 2) / (M1_CPU + 1) */ + tmp = bcm_perf_readl(PERF_MIPSPLLCTL_REG); + n1 = (tmp & MIPSPLLCTL_N1_MASK) >> MIPSPLLCTL_N1_SHIFT; + n2 = (tmp & MIPSPLLCTL_N2_MASK) >> MIPSPLLCTL_N2_SHIFT; + m1 = (tmp & MIPSPLLCTL_M1CPU_MASK) >> MIPSPLLCTL_M1CPU_SHIFT; + n1 += 1; + n2 += 2; + m1 += 1; + return (16 * 1000000 * n1 * n2) / m1; + } + + case BCM6358_CPU_ID: + { + unsigned int tmp, n1, n2, m1; + + /* 16MHz * N1 * N2 / M1_CPU */ + tmp = bcm_ddr_readl(DDR_DMIPSPLLCFG_REG); + n1 = (tmp & DMIPSPLLCFG_N1_MASK) >> DMIPSPLLCFG_N1_SHIFT; + n2 = (tmp & DMIPSPLLCFG_N2_MASK) >> DMIPSPLLCFG_N2_SHIFT; + m1 = (tmp & DMIPSPLLCFG_M1_MASK) >> DMIPSPLLCFG_M1_SHIFT; + return (16 * 1000000 * n1 * n2) / m1; + } + + case BCM6362_CPU_ID: + { + unsigned int tmp, mips_pll_fcvo; + + tmp = bcm_misc_readl(MISC_STRAPBUS_6362_REG); + mips_pll_fcvo = (tmp & STRAPBUS_6362_FCVO_MASK) + >> STRAPBUS_6362_FCVO_SHIFT; + switch (mips_pll_fcvo) { + case 0x03: + case 0x0b: + case 0x13: + case 0x1b: + return 240000000; + case 0x04: + case 0x0c: + case 0x14: + case 0x1c: + return 160000000; + case 0x05: + case 0x0e: + case 0x16: + case 0x1e: + case 0x1f: + return 400000000; + case 0x06: + return 440000000; + case 0x07: + case 0x17: + return 384000000; + case 0x15: + case 0x1d: + return 200000000; + default: + return 320000000; + } + } + case BCM6368_CPU_ID: + { + unsigned int tmp, p1, p2, ndiv, m1; + + /* (64MHz / P1) * P2 * NDIV / M1_CPU */ + tmp = bcm_ddr_readl(DDR_DMIPSPLLCFG_6368_REG); + + p1 = (tmp & DMIPSPLLCFG_6368_P1_MASK) >> + DMIPSPLLCFG_6368_P1_SHIFT; + + p2 = (tmp & DMIPSPLLCFG_6368_P2_MASK) >> + DMIPSPLLCFG_6368_P2_SHIFT; + + ndiv = (tmp & DMIPSPLLCFG_6368_NDIV_MASK) >> + DMIPSPLLCFG_6368_NDIV_SHIFT; + + tmp = bcm_ddr_readl(DDR_DMIPSPLLDIV_6368_REG); + m1 = (tmp & DMIPSPLLDIV_6368_MDIV_MASK) >> + DMIPSPLLDIV_6368_MDIV_SHIFT; + + return (((64 * 1000000) / p1) * p2 * ndiv) / m1; + } + + default: + panic("Failed to detect clock for CPU with id=%04X\n", cpu_id); + } +} + +/* + * attempt to detect the amount of memory installed + */ +static unsigned int detect_memory_size(void) +{ + unsigned int cols = 0, rows = 0, is_32bits = 0, banks = 0; + u32 val; + + if (BCMCPU_IS_6328() || BCMCPU_IS_6362()) + return bcm_ddr_readl(DDR_CSEND_REG) << 24; + + if (BCMCPU_IS_6345()) { + val = bcm_sdram_readl(SDRAM_MBASE_REG); + return val * 8 * 1024 * 1024; + } + + if (BCMCPU_IS_6338() || BCMCPU_IS_6348()) { + val = bcm_sdram_readl(SDRAM_CFG_REG); + rows = (val & SDRAM_CFG_ROW_MASK) >> SDRAM_CFG_ROW_SHIFT; + cols = (val & SDRAM_CFG_COL_MASK) >> SDRAM_CFG_COL_SHIFT; + is_32bits = (val & SDRAM_CFG_32B_MASK) ? 1 : 0; + banks = (val & SDRAM_CFG_BANK_MASK) ? 2 : 1; + } + + if (BCMCPU_IS_3368() || BCMCPU_IS_6358() || BCMCPU_IS_6368()) { + val = bcm_memc_readl(MEMC_CFG_REG); + rows = (val & MEMC_CFG_ROW_MASK) >> MEMC_CFG_ROW_SHIFT; + cols = (val & MEMC_CFG_COL_MASK) >> MEMC_CFG_COL_SHIFT; + is_32bits = (val & MEMC_CFG_32B_MASK) ? 0 : 1; + banks = 2; + } + + /* 0 => 11 address bits ... 2 => 13 address bits */ + rows += 11; + + /* 0 => 8 address bits ... 2 => 10 address bits */ + cols += 8; + + return 1 << (cols + rows + (is_32bits + 1) + banks); +} + +void __init bcm63xx_cpu_init(void) +{ + unsigned int tmp; + unsigned int cpu = smp_processor_id(); + u32 chipid_reg; + + /* soc registers location depends on cpu type */ + chipid_reg = 0; + + switch (current_cpu_type()) { + case CPU_BMIPS3300: + if ((read_c0_prid() & PRID_IMP_MASK) != PRID_IMP_BMIPS3300_ALT) + __cpu_name[cpu] = "Broadcom BCM6338"; + /* fall-through */ + case CPU_BMIPS32: + chipid_reg = BCM_6345_PERF_BASE; + break; + case CPU_BMIPS4350: + switch ((read_c0_prid() & PRID_REV_MASK)) { + case 0x04: + chipid_reg = BCM_3368_PERF_BASE; + break; + case 0x10: + chipid_reg = BCM_6345_PERF_BASE; + break; + default: + chipid_reg = BCM_6368_PERF_BASE; + break; + } + break; + } + + /* + * really early to panic, but delaying panic would not help since we + * will never get any working console + */ + if (!chipid_reg) + panic("unsupported Broadcom CPU"); + + /* read out CPU type */ + tmp = bcm_readl(chipid_reg); + bcm63xx_cpu_id = (tmp & REV_CHIPID_MASK) >> REV_CHIPID_SHIFT; + bcm63xx_cpu_rev = (tmp & REV_REVID_MASK) >> REV_REVID_SHIFT; + + switch (bcm63xx_cpu_id) { + case BCM3368_CPU_ID: + bcm63xx_regs_base = bcm3368_regs_base; + bcm63xx_irqs = bcm3368_irqs; + break; + case BCM6328_CPU_ID: + bcm63xx_regs_base = bcm6328_regs_base; + bcm63xx_irqs = bcm6328_irqs; + break; + case BCM6338_CPU_ID: + bcm63xx_regs_base = bcm6338_regs_base; + bcm63xx_irqs = bcm6338_irqs; + break; + case BCM6345_CPU_ID: + bcm63xx_regs_base = bcm6345_regs_base; + bcm63xx_irqs = bcm6345_irqs; + break; + case BCM6348_CPU_ID: + bcm63xx_regs_base = bcm6348_regs_base; + bcm63xx_irqs = bcm6348_irqs; + break; + case BCM6358_CPU_ID: + bcm63xx_regs_base = bcm6358_regs_base; + bcm63xx_irqs = bcm6358_irqs; + break; + case BCM6362_CPU_ID: + bcm63xx_regs_base = bcm6362_regs_base; + bcm63xx_irqs = bcm6362_irqs; + break; + case BCM6368_CPU_ID: + bcm63xx_regs_base = bcm6368_regs_base; + bcm63xx_irqs = bcm6368_irqs; + break; + default: + panic("unsupported broadcom CPU %x", bcm63xx_cpu_id); + break; + } + + bcm63xx_cpu_freq = detect_cpu_clock(); + bcm63xx_memory_size = detect_memory_size(); + + printk(KERN_INFO "Detected Broadcom 0x%04x CPU revision %02x\n", + bcm63xx_cpu_id, bcm63xx_cpu_rev); + printk(KERN_INFO "CPU frequency is %u MHz\n", + bcm63xx_cpu_freq / 1000000); + printk(KERN_INFO "%uMB of RAM installed\n", + bcm63xx_memory_size >> 20); +} |