/* linux/arch/arm/mach-s5pv210/clock.c
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* S5PV210 - Clock support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/sysdev.h>
#include <linux/io.h>
#include <mach/map.h>
#include <plat/cpu-freq.h>
#include <mach/regs-clock.h>
#include <plat/clock.h>
#include <plat/cpu.h>
#include <plat/pll.h>
#include <plat/s5p-clock.h>
#include <plat/clock-clksrc.h>
#include <plat/s5pv210.h>
static struct clksrc_clk clk_mout_apll = {
.clk = {
.name = "mout_apll",
.id = -1,
},
.sources = &clk_src_apll,
.reg_src = { .reg = S5P_CLK_SRC0, .shift = 0, .size = 1 },
};
static struct clksrc_clk clk_mout_epll = {
.clk = {
.name = "mout_epll",
.id = -1,
},
.sources = &clk_src_epll,
.reg_src = { .reg = S5P_CLK_SRC0, .shift = 8, .size = 1 },
};
static struct clksrc_clk clk_mout_mpll = {
.clk = {
.name = "mout_mpll",
.id = -1,
},
.sources = &clk_src_mpll,
.reg_src = { .reg = S5P_CLK_SRC0, .shift = 4, .size = 1 },
};
static int s5pv210_clk_ip0_ctrl(struct clk *clk, int enable)
{
return s5p_gatectrl(S5P_CLKGATE_IP0, clk, enable);
}
static int s5pv210_clk_ip1_ctrl(struct clk *clk, int enable)
{
return s5p_gatectrl(S5P_CLKGATE_IP1, clk, enable);
}
static int s5pv210_clk_ip2_ctrl(struct clk *clk, int enable)
{
return s5p_gatectrl(S5P_CLKGATE_IP2, clk, enable);
}
static int s5pv210_clk_ip3_ctrl(struct clk *clk, int enable)
{
return s5p_gatectrl(S5P_CLKGATE_IP3, clk, enable);
}
static struct clk clk_h200 = {
.name = "hclk200",
.id = -1,
};
static struct clk clk_h100 = {
.name = "hclk100",
.id = -1,
};
static struct clk clk_h166 = {
.name = "hclk166",
.id = -1,
};
static struct clk clk_h133 = {
.name = "hclk133",
.id = -1,
};
static struct clk clk_p100 = {
.name = "pclk100",
.id = -1,
};
static struct clk clk_p83 = {
.name = "pclk83",
.id = -1,
};
static struct clk clk_p66 = {
.name = "pclk66",
.id = -1,
};
static struct clk *sys_clks[] = {
&clk_h200,
&clk_h100,
&clk_h166,
&clk_h133,
&clk_p100,
&clk_p83,
&clk_p66
};
static struct clk init_clocks_disable[] = {
{
.name = "rot",
.id = -1,
.parent = &clk_h166,
.enable = s5pv210_clk_ip0_ctrl,
.ctrlbit = (1<<29),
}, {
.name = "otg",
.id = -1,
.parent = &clk_h133,
.enable = s5pv210_clk_ip1_ctrl,
.ctrlbit = (1<<16),
}, {
.name = "usb-host",
.id = -1,
.parent = &clk_h133,
.enable = s5pv210_clk_ip1_ctrl,
.ctrlbit = (1<<17),
}, {
.name = "lcd",
.id = -1,
.parent = &clk_h166,
.enable = s5pv210_clk_ip1_ctrl,
.ctrlbit = (1<<0),
}, {
.name = "cfcon",
.id = 0,
.parent = &clk_h133,
.enable = s5pv210_clk_ip1_ctrl,
.ctrlbit = (1<<25),
}, {
.name = "hsmmc",
.id = 0,
.parent = &clk_h133,
.enable = s5pv210_clk_ip2_ctrl,
.ctrlbit = (1<<16),
}, {
.name = "hsmmc",
.id = 1,
.parent = &clk_h133,
.enable = s5pv210_clk_ip2_ctrl,
.ctrlbit = (1<<17),
}, {
.name = "hsmmc",
.id = 2,
.parent = &clk_h133,
.enable = s5pv210_clk_ip2_ctrl,
.ctrlbit = (1<<18),
}, {
.name = "hsmmc",
.id = 3,
.parent = &clk_h133,
.enable = s5pv210_clk_ip2_ctrl,
.ctrlbit = (1<<19),
}, {
.name = "systimer",
.id = -1,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<16),
}, {
.name = "watchdog",
.id = -1,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<22),
}, {
.name = "rtc",
.id = -1,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<15),
}, {
.name = "i2c",
.id = 0,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<7),
}, {
.name = "i2c",
.id = 1,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<8),
}, {
.name = "i2c",
.id = 2,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<9),
}, {
.name = "spi",
.id = 0,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<12),
}, {
.name = "spi",
.id = 1,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<13),
}, {
.name = "spi",
.id = 2,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<14),
}, {
.name = "timers",
.id = -1,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<23),
}, {
.name = "adc",
.id = -1,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<24),
}, {
.name = "keypad",
.id = -1,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<21),
}, {
.name = "i2s_v50",
.id = 0,
.parent = &clk_p,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<4),
}, {
.name = "i2s_v32",
.id = 0,
.parent = &clk_p,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<4),
}, {
.name = "i2s_v32",
.id = 1,
.parent = &clk_p,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<4),
}
};
static struct clk init_clocks[] = {
{
.name = "uart",
.id = 0,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<7),
}, {
.name = "uart",
.id = 1,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<8),
}, {
.name = "uart",
.id = 2,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<9),
}, {
.name = "uart",
.id = 3,
.parent = &clk_p66,
.enable = s5pv210_clk_ip3_ctrl,
.ctrlbit = (1<<10),
},
};
static struct clk *clkset_uart_list[] = {
[6] = &clk_mout_mpll.clk,
[7] = &clk_mout_epll.clk,
};
static struct clksrc_sources clkset_uart = {
.sources = clkset_uart_list,
.nr_sources = ARRAY_SIZE(clkset_uart_list),
};
static struct clksrc_clk clksrcs[] = {
{
.clk = {
.name = "uclk1",
.id = -1,
.ctrlbit = (1<<17),
.enable = s5pv210_clk_ip3_ctrl,
},
.sources = &clkset_uart,
.reg_src = { .reg = S5P_CLK_SRC4, .shift = 16, .size = 4 },
.reg_div = { .reg = S5P_CLK_DIV4, .shift = 16, .size = 4 },
}
};
/* Clock initialisation code */
static struct clksrc_clk *sysclks[] = {
&clk_mout_apll,
&clk_mout_epll,
&clk_mout_mpll,
};
#define GET_DIV(clk, field) ((((clk) & field##_MASK) >> field##_SHIFT) + 1)
void __init_or_cpufreq s5pv210_setup_clocks(void)
{
struct clk *xtal_clk;
unsigned long xtal;
unsigned long armclk;
unsigned long hclk200;
unsigned long hclk166;
unsigned long hclk133;
unsigned long pclk100;
unsigned long pclk83;
unsigned long pclk66;
unsigned long apll;
unsigned long mpll;
unsigned long epll;
unsigned int ptr;
u32 clkdiv0, clkdiv1;
printk(KERN_DEBUG "%s: registering clocks\n", __func__);
clkdiv0 = __raw_readl(S5P_CLK_DIV0);
clkdiv1 = __raw_readl(S5P_CLK_DIV1);
printk(KERN_DEBUG "%s: clkdiv0 = %08x, clkdiv1 = %08x\n",
__func__, clkdiv0, clkdiv1);
xtal_clk = clk_get(NULL, "xtal");
BUG_ON(IS_ERR(xtal_clk));
xtal = clk_get_rate(xtal_clk);
clk_put(xtal_clk);
printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);
apll = s5p_get_pll45xx(xtal, __raw_readl(S5P_APLL_CON), pll_4508);
mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P_MPLL_CON), pll_4502);
epll = s5p_get_pll45xx(xtal, __raw_readl(S5P_EPLL_CON), pll_4500);
printk(KERN_INFO "S5PV210: PLL settings, A=%ld, M=%ld, E=%ld",
apll, mpll, epll);
armclk = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_APLL);
if (__raw_readl(S5P_CLK_SRC0) & S5P_CLKSRC0_MUX200_MASK)
hclk200 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK200);
else
hclk200 = armclk / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK200);
if (__raw_readl(S5P_CLK_SRC0) & S5P_CLKSRC0_MUX166_MASK) {
hclk166 = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_A2M);
hclk166 = hclk166 / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK166);
} else
hclk166 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK166);
if (__raw_readl(S5P_CLK_SRC0) & S5P_CLKSRC0_MUX133_MASK) {
hclk133 = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_A2M);
hclk133 = hclk133 / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK133);
} else
hclk133 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK133);
pclk100 = hclk200 / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK100);
pclk83 = hclk166 / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK83);
pclk66 = hclk133 / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK66);
printk(KERN_INFO "S5PV210: ARMCLK=%ld, HCLKM=%ld, HCLKD=%ld, \
HCLKP=%ld, PCLKM=%ld, PCLKD=%ld, PCLKP=%ld\n",
armclk, hclk200, hclk166, hclk133, pclk100, pclk83, pclk66);
clk_fout_apll.rate = apll;
clk_fout_mpll.rate = mpll;
clk_fout_epll.rate = epll;
clk_f.rate = armclk;
clk_h.rate = hclk133;
clk_p.rate = pclk66;
clk_p66.rate = pclk66;
clk_p83.rate = pclk83;
clk_h133.rate = hclk133;
clk_h166.rate = hclk166;
clk_h200.rate = hclk200;
for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
s3c_set_clksrc(&clksrcs[ptr], true);
}
static struct clk *clks[] __initdata = {
};
void __init s5pv210_register_clocks(void)
{
struct clk *clkp;
int ret;
int ptr;
ret = s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
if (ret > 0)
printk(KERN_ERR "Failed to register %u clocks\n", ret);
for (ptr = 0; ptr < ARRAY_SIZE(sysclks); ptr++)
s3c_register_clksrc(sysclks[ptr], 1);
s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
ret = s3c24xx_register_clocks(sys_clks, ARRAY_SIZE(sys_clks));
if (ret > 0)
printk(KERN_ERR "Failed to register system clocks\n");
clkp = init_clocks_disable;
for (ptr = 0; ptr < ARRAY_SIZE(init_clocks_disable); ptr++, clkp++) {
ret = s3c24xx_register_clock(clkp);
if (ret < 0) {
printk(KERN_ERR "Failed to register clock %s (%d)\n",
clkp->name, ret);
}
(clkp->enable)(clkp, 0);
}
s3c_pwmclk_init();
}
