386 lines
8.4 KiB
C
386 lines
8.4 KiB
C
/*
|
|
* 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/export.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";
|
|
fallthrough;
|
|
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();
|
|
|
|
pr_info("Detected Broadcom 0x%04x CPU revision %02x\n",
|
|
bcm63xx_cpu_id, bcm63xx_cpu_rev);
|
|
pr_info("CPU frequency is %u MHz\n",
|
|
bcm63xx_cpu_freq / 1000000);
|
|
pr_info("%uMB of RAM installed\n",
|
|
bcm63xx_memory_size >> 20);
|
|
}
|