Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-02 09:30:10 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/arch/arm/mach-exynos/clock.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

1773 lines
39 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2010 Samsung Electronics
* Minkyu Kang <mk7.kang@samsung.com>
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/clk.h>
#include <asm/arch/periph.h>
#define PLL_DIV_1024 1024
#define PLL_DIV_65535 65535
#define PLL_DIV_65536 65536
/* *
* This structure is to store the src bit, div bit and prediv bit
* positions of the peripheral clocks of the src and div registers
*/
struct clk_bit_info {
enum periph_id id;
int32_t src_mask;
int32_t div_mask;
int32_t prediv_mask;
int8_t src_bit;
int8_t div_bit;
int8_t prediv_bit;
};
static struct clk_bit_info exynos5_bit_info[] = {
/* periph id s_mask d_mask p_mask s_bit d_bit p_bit */
{PERIPH_ID_UART0, 0xf, 0xf, -1, 0, 0, -1},
{PERIPH_ID_UART1, 0xf, 0xf, -1, 4, 4, -1},
{PERIPH_ID_UART2, 0xf, 0xf, -1, 8, 8, -1},
{PERIPH_ID_UART3, 0xf, 0xf, -1, 12, 12, -1},
{PERIPH_ID_I2C0, -1, 0x7, 0x7, -1, 24, 0},
{PERIPH_ID_I2C1, -1, 0x7, 0x7, -1, 24, 0},
{PERIPH_ID_I2C2, -1, 0x7, 0x7, -1, 24, 0},
{PERIPH_ID_I2C3, -1, 0x7, 0x7, -1, 24, 0},
{PERIPH_ID_I2C4, -1, 0x7, 0x7, -1, 24, 0},
{PERIPH_ID_I2C5, -1, 0x7, 0x7, -1, 24, 0},
{PERIPH_ID_I2C6, -1, 0x7, 0x7, -1, 24, 0},
{PERIPH_ID_I2C7, -1, 0x7, 0x7, -1, 24, 0},
{PERIPH_ID_SPI0, 0xf, 0xf, 0xff, 16, 0, 8},
{PERIPH_ID_SPI1, 0xf, 0xf, 0xff, 20, 16, 24},
{PERIPH_ID_SPI2, 0xf, 0xf, 0xff, 24, 0, 8},
{PERIPH_ID_SDMMC0, 0xf, 0xf, 0xff, 0, 0, 8},
{PERIPH_ID_SDMMC1, 0xf, 0xf, 0xff, 4, 16, 24},
{PERIPH_ID_SDMMC2, 0xf, 0xf, 0xff, 8, 0, 8},
{PERIPH_ID_SDMMC3, 0xf, 0xf, 0xff, 12, 16, 24},
{PERIPH_ID_I2S0, 0xf, 0xf, 0xff, 0, 0, 4},
{PERIPH_ID_I2S1, 0xf, 0xf, 0xff, 4, 12, 16},
{PERIPH_ID_SPI3, 0xf, 0xf, 0xff, 0, 0, 4},
{PERIPH_ID_SPI4, 0xf, 0xf, 0xff, 4, 12, 16},
{PERIPH_ID_SDMMC4, 0xf, 0xf, 0xff, 16, 0, 8},
{PERIPH_ID_PWM0, 0xf, 0xf, -1, 24, 0, -1},
{PERIPH_ID_PWM1, 0xf, 0xf, -1, 24, 0, -1},
{PERIPH_ID_PWM2, 0xf, 0xf, -1, 24, 0, -1},
{PERIPH_ID_PWM3, 0xf, 0xf, -1, 24, 0, -1},
{PERIPH_ID_PWM4, 0xf, 0xf, -1, 24, 0, -1},
{PERIPH_ID_NONE, -1, -1, -1, -1, -1, -1},
};
static struct clk_bit_info exynos542x_bit_info[] = {
/* periph id s_mask d_mask p_mask s_bit d_bit p_bit */
{PERIPH_ID_UART0, 0xf, 0xf, -1, 4, 8, -1},
{PERIPH_ID_UART1, 0xf, 0xf, -1, 8, 12, -1},
{PERIPH_ID_UART2, 0xf, 0xf, -1, 12, 16, -1},
{PERIPH_ID_UART3, 0xf, 0xf, -1, 16, 20, -1},
{PERIPH_ID_I2C0, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_I2C1, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_I2C2, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_I2C3, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_I2C4, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_I2C5, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_I2C6, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_I2C7, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_SPI0, 0xf, 0xf, 0xff, 20, 20, 8},
{PERIPH_ID_SPI1, 0xf, 0xf, 0xff, 24, 24, 16},
{PERIPH_ID_SPI2, 0xf, 0xf, 0xff, 28, 28, 24},
{PERIPH_ID_SDMMC0, 0x7, 0x3ff, -1, 8, 0, -1},
{PERIPH_ID_SDMMC1, 0x7, 0x3ff, -1, 12, 10, -1},
{PERIPH_ID_SDMMC2, 0x7, 0x3ff, -1, 16, 20, -1},
{PERIPH_ID_I2C8, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_I2C9, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_I2S0, 0xf, 0xf, 0xff, 0, 0, 4},
{PERIPH_ID_I2S1, 0xf, 0xf, 0xff, 4, 12, 16},
{PERIPH_ID_SPI3, 0xf, 0xf, 0xff, 12, 16, 0},
{PERIPH_ID_SPI4, 0xf, 0xf, 0xff, 16, 20, 8},
{PERIPH_ID_PWM0, 0xf, 0xf, -1, 24, 28, -1},
{PERIPH_ID_PWM1, 0xf, 0xf, -1, 24, 28, -1},
{PERIPH_ID_PWM2, 0xf, 0xf, -1, 24, 28, -1},
{PERIPH_ID_PWM3, 0xf, 0xf, -1, 24, 28, -1},
{PERIPH_ID_PWM4, 0xf, 0xf, -1, 24, 28, -1},
{PERIPH_ID_I2C10, -1, 0x3f, -1, -1, 8, -1},
{PERIPH_ID_NONE, -1, -1, -1, -1, -1, -1},
};
/* Epll Clock division values to achive different frequency output */
static struct set_epll_con_val exynos5_epll_div[] = {
{ 192000000, 0, 48, 3, 1, 0 },
{ 180000000, 0, 45, 3, 1, 0 },
{ 73728000, 1, 73, 3, 3, 47710 },
{ 67737600, 1, 90, 4, 3, 20762 },
{ 49152000, 0, 49, 3, 3, 9961 },
{ 45158400, 0, 45, 3, 3, 10381 },
{ 180633600, 0, 45, 3, 1, 10381 }
};
/* exynos: return pll clock frequency */
static int exynos_get_pll_clk(int pllreg, unsigned int r, unsigned int k)
{
unsigned long m, p, s = 0, mask, fout;
unsigned int div;
unsigned int freq;
/*
* APLL_CON: MIDV [25:16]
* MPLL_CON: MIDV [25:16]
* EPLL_CON: MIDV [24:16]
* VPLL_CON: MIDV [24:16]
* BPLL_CON: MIDV [25:16]: Exynos5
*/
if (pllreg == APLL || pllreg == MPLL || pllreg == BPLL ||
pllreg == SPLL)
mask = 0x3ff;
else
mask = 0x1ff;
m = (r >> 16) & mask;
/* PDIV [13:8] */
p = (r >> 8) & 0x3f;
/* SDIV [2:0] */
s = r & 0x7;
freq = CONFIG_SYS_CLK_FREQ;
if (pllreg == EPLL || pllreg == RPLL) {
k = k & 0xffff;
/* FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV) */
fout = (m + k / PLL_DIV_65536) * (freq / (p * (1 << s)));
} else if (pllreg == VPLL) {
k = k & 0xfff;
/*
* Exynos4210
* FOUT = (MDIV + K / 1024) * FIN / (PDIV * 2^SDIV)
*
* Exynos4412
* FOUT = (MDIV + K / 65535) * FIN / (PDIV * 2^SDIV)
*
* Exynos5250
* FOUT = (MDIV + K / 65536) * FIN / (PDIV * 2^SDIV)
*/
if (proid_is_exynos4210())
div = PLL_DIV_1024;
else if (proid_is_exynos4412())
div = PLL_DIV_65535;
else if (proid_is_exynos5250() || proid_is_exynos5420() ||
proid_is_exynos5422())
div = PLL_DIV_65536;
else
return 0;
fout = (m + k / div) * (freq / (p * (1 << s)));
} else {
/*
* Exynos4412 / Exynos5250
* FOUT = MDIV * FIN / (PDIV * 2^SDIV)
*
* Exynos4210
* FOUT = MDIV * FIN / (PDIV * 2^(SDIV-1))
*/
if (proid_is_exynos4210())
fout = m * (freq / (p * (1 << (s - 1))));
else
fout = m * (freq / (p * (1 << s)));
}
return fout;
}
/* exynos4: return pll clock frequency */
static unsigned long exynos4_get_pll_clk(int pllreg)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
unsigned long r, k = 0;
switch (pllreg) {
case APLL:
r = readl(&clk->apll_con0);
break;
case MPLL:
r = readl(&clk->mpll_con0);
break;
case EPLL:
r = readl(&clk->epll_con0);
k = readl(&clk->epll_con1);
break;
case VPLL:
r = readl(&clk->vpll_con0);
k = readl(&clk->vpll_con1);
break;
default:
printf("Unsupported PLL (%d)\n", pllreg);
return 0;
}
return exynos_get_pll_clk(pllreg, r, k);
}
/* exynos4x12: return pll clock frequency */
static unsigned long exynos4x12_get_pll_clk(int pllreg)
{
struct exynos4x12_clock *clk =
(struct exynos4x12_clock *)samsung_get_base_clock();
unsigned long r, k = 0;
switch (pllreg) {
case APLL:
r = readl(&clk->apll_con0);
break;
case MPLL:
r = readl(&clk->mpll_con0);
break;
case EPLL:
r = readl(&clk->epll_con0);
k = readl(&clk->epll_con1);
break;
case VPLL:
r = readl(&clk->vpll_con0);
k = readl(&clk->vpll_con1);
break;
default:
printf("Unsupported PLL (%d)\n", pllreg);
return 0;
}
return exynos_get_pll_clk(pllreg, r, k);
}
/* exynos5: return pll clock frequency */
static unsigned long exynos5_get_pll_clk(int pllreg)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
unsigned long r, k = 0, fout;
unsigned int pll_div2_sel, fout_sel;
switch (pllreg) {
case APLL:
r = readl(&clk->apll_con0);
break;
case MPLL:
r = readl(&clk->mpll_con0);
break;
case EPLL:
r = readl(&clk->epll_con0);
k = readl(&clk->epll_con1);
break;
case VPLL:
r = readl(&clk->vpll_con0);
k = readl(&clk->vpll_con1);
break;
case BPLL:
r = readl(&clk->bpll_con0);
break;
default:
printf("Unsupported PLL (%d)\n", pllreg);
return 0;
}
fout = exynos_get_pll_clk(pllreg, r, k);
/* According to the user manual, in EVT1 MPLL and BPLL always gives
* 1.6GHz clock, so divide by 2 to get 800MHz MPLL clock.*/
if (pllreg == MPLL || pllreg == BPLL) {
pll_div2_sel = readl(&clk->pll_div2_sel);
switch (pllreg) {
case MPLL:
fout_sel = (pll_div2_sel >> MPLL_FOUT_SEL_SHIFT)
& MPLL_FOUT_SEL_MASK;
break;
case BPLL:
fout_sel = (pll_div2_sel >> BPLL_FOUT_SEL_SHIFT)
& BPLL_FOUT_SEL_MASK;
break;
default:
fout_sel = -1;
break;
}
if (fout_sel == 0)
fout /= 2;
}
return fout;
}
/* exynos542x: return pll clock frequency */
static unsigned long exynos542x_get_pll_clk(int pllreg)
{
struct exynos5420_clock *clk =
(struct exynos5420_clock *)samsung_get_base_clock();
unsigned long r, k = 0;
switch (pllreg) {
case APLL:
r = readl(&clk->apll_con0);
break;
case MPLL:
r = readl(&clk->mpll_con0);
break;
case EPLL:
r = readl(&clk->epll_con0);
k = readl(&clk->epll_con1);
break;
case VPLL:
r = readl(&clk->vpll_con0);
k = readl(&clk->vpll_con1);
break;
case BPLL:
r = readl(&clk->bpll_con0);
break;
case RPLL:
r = readl(&clk->rpll_con0);
k = readl(&clk->rpll_con1);
break;
case SPLL:
r = readl(&clk->spll_con0);
break;
default:
printf("Unsupported PLL (%d)\n", pllreg);
return 0;
}
return exynos_get_pll_clk(pllreg, r, k);
}
static struct clk_bit_info *get_clk_bit_info(int peripheral)
{
int i;
struct clk_bit_info *info;
if (proid_is_exynos5420() || proid_is_exynos5422())
info = exynos542x_bit_info;
else
info = exynos5_bit_info;
for (i = 0; info[i].id != PERIPH_ID_NONE; i++) {
if (info[i].id == peripheral)
break;
}
if (info[i].id == PERIPH_ID_NONE)
debug("ERROR: Peripheral ID %d not found\n", peripheral);
return &info[i];
}
static unsigned long exynos5_get_periph_rate(int peripheral)
{
struct clk_bit_info *bit_info = get_clk_bit_info(peripheral);
unsigned long sclk = 0;
unsigned int src = 0, div = 0, sub_div = 0;
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
switch (peripheral) {
case PERIPH_ID_UART0:
case PERIPH_ID_UART1:
case PERIPH_ID_UART2:
case PERIPH_ID_UART3:
src = readl(&clk->src_peric0);
div = readl(&clk->div_peric0);
break;
case PERIPH_ID_PWM0:
case PERIPH_ID_PWM1:
case PERIPH_ID_PWM2:
case PERIPH_ID_PWM3:
case PERIPH_ID_PWM4:
src = readl(&clk->src_peric0);
div = readl(&clk->div_peric3);
break;
case PERIPH_ID_I2S0:
src = readl(&clk->src_mau);
div = sub_div = readl(&clk->div_mau);
case PERIPH_ID_SPI0:
case PERIPH_ID_SPI1:
src = readl(&clk->src_peric1);
div = sub_div = readl(&clk->div_peric1);
break;
case PERIPH_ID_SPI2:
src = readl(&clk->src_peric1);
div = sub_div = readl(&clk->div_peric2);
break;
case PERIPH_ID_SPI3:
case PERIPH_ID_SPI4:
src = readl(&clk->sclk_src_isp);
div = sub_div = readl(&clk->sclk_div_isp);
break;
case PERIPH_ID_SDMMC0:
case PERIPH_ID_SDMMC1:
src = readl(&clk->src_fsys);
div = sub_div = readl(&clk->div_fsys1);
break;
case PERIPH_ID_SDMMC2:
case PERIPH_ID_SDMMC3:
src = readl(&clk->src_fsys);
div = sub_div = readl(&clk->div_fsys2);
break;
case PERIPH_ID_I2C0:
case PERIPH_ID_I2C1:
case PERIPH_ID_I2C2:
case PERIPH_ID_I2C3:
case PERIPH_ID_I2C4:
case PERIPH_ID_I2C5:
case PERIPH_ID_I2C6:
case PERIPH_ID_I2C7:
src = EXYNOS_SRC_MPLL;
div = readl(&clk->div_top1);
sub_div = readl(&clk->div_top0);
break;
default:
debug("%s: invalid peripheral %d", __func__, peripheral);
return -1;
};
if (bit_info->src_bit >= 0)
src = (src >> bit_info->src_bit) & bit_info->src_mask;
switch (src) {
case EXYNOS_SRC_MPLL:
sclk = exynos5_get_pll_clk(MPLL);
break;
case EXYNOS_SRC_EPLL:
sclk = exynos5_get_pll_clk(EPLL);
break;
case EXYNOS_SRC_VPLL:
sclk = exynos5_get_pll_clk(VPLL);
break;
default:
debug("%s: EXYNOS_SRC %d not supported\n", __func__, src);
return 0;
}
/* Clock divider ratio for this peripheral */
if (bit_info->div_bit >= 0)
div = (div >> bit_info->div_bit) & bit_info->div_mask;
/* Clock pre-divider ratio for this peripheral */
if (bit_info->prediv_bit >= 0)
sub_div = (sub_div >> bit_info->prediv_bit)
& bit_info->prediv_mask;
/* Calculate and return required clock rate */
return (sclk / (div + 1)) / (sub_div + 1);
}
static unsigned long exynos542x_get_periph_rate(int peripheral)
{
struct clk_bit_info *bit_info = get_clk_bit_info(peripheral);
unsigned long sclk = 0;
unsigned int src = 0, div = 0, sub_div = 0;
struct exynos5420_clock *clk =
(struct exynos5420_clock *)samsung_get_base_clock();
switch (peripheral) {
case PERIPH_ID_UART0:
case PERIPH_ID_UART1:
case PERIPH_ID_UART2:
case PERIPH_ID_UART3:
case PERIPH_ID_PWM0:
case PERIPH_ID_PWM1:
case PERIPH_ID_PWM2:
case PERIPH_ID_PWM3:
case PERIPH_ID_PWM4:
src = readl(&clk->src_peric0);
div = readl(&clk->div_peric0);
break;
case PERIPH_ID_SPI0:
case PERIPH_ID_SPI1:
case PERIPH_ID_SPI2:
src = readl(&clk->src_peric1);
div = readl(&clk->div_peric1);
sub_div = readl(&clk->div_peric4);
break;
case PERIPH_ID_SPI3:
case PERIPH_ID_SPI4:
src = readl(&clk->src_isp);
div = readl(&clk->div_isp1);
sub_div = readl(&clk->div_isp1);
break;
case PERIPH_ID_SDMMC0:
case PERIPH_ID_SDMMC1:
case PERIPH_ID_SDMMC2:
case PERIPH_ID_SDMMC3:
src = readl(&clk->src_fsys);
div = readl(&clk->div_fsys1);
break;
case PERIPH_ID_I2C0:
case PERIPH_ID_I2C1:
case PERIPH_ID_I2C2:
case PERIPH_ID_I2C3:
case PERIPH_ID_I2C4:
case PERIPH_ID_I2C5:
case PERIPH_ID_I2C6:
case PERIPH_ID_I2C7:
case PERIPH_ID_I2C8:
case PERIPH_ID_I2C9:
case PERIPH_ID_I2C10:
src = EXYNOS542X_SRC_MPLL;
div = readl(&clk->div_top1);
break;
default:
debug("%s: invalid peripheral %d", __func__, peripheral);
return -1;
};
if (bit_info->src_bit >= 0)
src = (src >> bit_info->src_bit) & bit_info->src_mask;
switch (src) {
case EXYNOS542X_SRC_MPLL:
sclk = exynos542x_get_pll_clk(MPLL);
break;
case EXYNOS542X_SRC_SPLL:
sclk = exynos542x_get_pll_clk(SPLL);
break;
case EXYNOS542X_SRC_EPLL:
sclk = exynos542x_get_pll_clk(EPLL);
break;
case EXYNOS542X_SRC_RPLL:
sclk = exynos542x_get_pll_clk(RPLL);
break;
default:
debug("%s: EXYNOS542X_SRC %d not supported", __func__, src);
return 0;
}
/* Clock divider ratio for this peripheral */
if (bit_info->div_bit >= 0)
div = (div >> bit_info->div_bit) & bit_info->div_mask;
/* Clock pre-divider ratio for this peripheral */
if (bit_info->prediv_bit >= 0)
sub_div = (sub_div >> bit_info->prediv_bit)
& bit_info->prediv_mask;
/* Calculate and return required clock rate */
return (sclk / (div + 1)) / (sub_div + 1);
}
unsigned long clock_get_periph_rate(int peripheral)
{
if (cpu_is_exynos5()) {
if (proid_is_exynos5420() || proid_is_exynos5422())
return exynos542x_get_periph_rate(peripheral);
return exynos5_get_periph_rate(peripheral);
} else {
return 0;
}
}
/* exynos4: return ARM clock frequency */
static unsigned long exynos4_get_arm_clk(void)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
unsigned long div;
unsigned long armclk;
unsigned int core_ratio;
unsigned int core2_ratio;
div = readl(&clk->div_cpu0);
/* CORE_RATIO: [2:0], CORE2_RATIO: [30:28] */
core_ratio = (div >> 0) & 0x7;
core2_ratio = (div >> 28) & 0x7;
armclk = get_pll_clk(APLL) / (core_ratio + 1);
armclk /= (core2_ratio + 1);
return armclk;
}
/* exynos4x12: return ARM clock frequency */
static unsigned long exynos4x12_get_arm_clk(void)
{
struct exynos4x12_clock *clk =
(struct exynos4x12_clock *)samsung_get_base_clock();
unsigned long div;
unsigned long armclk;
unsigned int core_ratio;
unsigned int core2_ratio;
div = readl(&clk->div_cpu0);
/* CORE_RATIO: [2:0], CORE2_RATIO: [30:28] */
core_ratio = (div >> 0) & 0x7;
core2_ratio = (div >> 28) & 0x7;
armclk = get_pll_clk(APLL) / (core_ratio + 1);
armclk /= (core2_ratio + 1);
return armclk;
}
/* exynos5: return ARM clock frequency */
static unsigned long exynos5_get_arm_clk(void)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
unsigned long div;
unsigned long armclk;
unsigned int arm_ratio;
unsigned int arm2_ratio;
div = readl(&clk->div_cpu0);
/* ARM_RATIO: [2:0], ARM2_RATIO: [30:28] */
arm_ratio = (div >> 0) & 0x7;
arm2_ratio = (div >> 28) & 0x7;
armclk = get_pll_clk(APLL) / (arm_ratio + 1);
armclk /= (arm2_ratio + 1);
return armclk;
}
/* exynos4: return pwm clock frequency */
static unsigned long exynos4_get_pwm_clk(void)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
unsigned long pclk, sclk;
unsigned int sel;
unsigned int ratio;
if (s5p_get_cpu_rev() == 0) {
/*
* CLK_SRC_PERIL0
* PWM_SEL [27:24]
*/
sel = readl(&clk->src_peril0);
sel = (sel >> 24) & 0xf;
if (sel == 0x6)
sclk = get_pll_clk(MPLL);
else if (sel == 0x7)
sclk = get_pll_clk(EPLL);
else if (sel == 0x8)
sclk = get_pll_clk(VPLL);
else
return 0;
/*
* CLK_DIV_PERIL3
* PWM_RATIO [3:0]
*/
ratio = readl(&clk->div_peril3);
ratio = ratio & 0xf;
} else if (s5p_get_cpu_rev() == 1) {
sclk = get_pll_clk(MPLL);
ratio = 8;
} else
return 0;
pclk = sclk / (ratio + 1);
return pclk;
}
/* exynos4x12: return pwm clock frequency */
static unsigned long exynos4x12_get_pwm_clk(void)
{
unsigned long pclk, sclk;
unsigned int ratio;
sclk = get_pll_clk(MPLL);
ratio = 8;
pclk = sclk / (ratio + 1);
return pclk;
}
/* exynos4: return uart clock frequency */
static unsigned long exynos4_get_uart_clk(int dev_index)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
unsigned long uclk, sclk;
unsigned int sel;
unsigned int ratio;
/*
* CLK_SRC_PERIL0
* UART0_SEL [3:0]
* UART1_SEL [7:4]
* UART2_SEL [8:11]
* UART3_SEL [12:15]
* UART4_SEL [16:19]
* UART5_SEL [23:20]
*/
sel = readl(&clk->src_peril0);
sel = (sel >> (dev_index << 2)) & 0xf;
if (sel == 0x6)
sclk = get_pll_clk(MPLL);
else if (sel == 0x7)
sclk = get_pll_clk(EPLL);
else if (sel == 0x8)
sclk = get_pll_clk(VPLL);
else
return 0;
/*
* CLK_DIV_PERIL0
* UART0_RATIO [3:0]
* UART1_RATIO [7:4]
* UART2_RATIO [8:11]
* UART3_RATIO [12:15]
* UART4_RATIO [16:19]
* UART5_RATIO [23:20]
*/
ratio = readl(&clk->div_peril0);
ratio = (ratio >> (dev_index << 2)) & 0xf;
uclk = sclk / (ratio + 1);
return uclk;
}
/* exynos4x12: return uart clock frequency */
static unsigned long exynos4x12_get_uart_clk(int dev_index)
{
struct exynos4x12_clock *clk =
(struct exynos4x12_clock *)samsung_get_base_clock();
unsigned long uclk, sclk;
unsigned int sel;
unsigned int ratio;
/*
* CLK_SRC_PERIL0
* UART0_SEL [3:0]
* UART1_SEL [7:4]
* UART2_SEL [8:11]
* UART3_SEL [12:15]
* UART4_SEL [16:19]
*/
sel = readl(&clk->src_peril0);
sel = (sel >> (dev_index << 2)) & 0xf;
if (sel == 0x6)
sclk = get_pll_clk(MPLL);
else if (sel == 0x7)
sclk = get_pll_clk(EPLL);
else if (sel == 0x8)
sclk = get_pll_clk(VPLL);
else
return 0;
/*
* CLK_DIV_PERIL0
* UART0_RATIO [3:0]
* UART1_RATIO [7:4]
* UART2_RATIO [8:11]
* UART3_RATIO [12:15]
* UART4_RATIO [16:19]
*/
ratio = readl(&clk->div_peril0);
ratio = (ratio >> (dev_index << 2)) & 0xf;
uclk = sclk / (ratio + 1);
return uclk;
}
static unsigned long exynos4_get_mmc_clk(int dev_index)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
unsigned long uclk, sclk;
unsigned int sel, ratio, pre_ratio;
int shift = 0;
sel = readl(&clk->src_fsys);
sel = (sel >> (dev_index << 2)) & 0xf;
if (sel == 0x6)
sclk = get_pll_clk(MPLL);
else if (sel == 0x7)
sclk = get_pll_clk(EPLL);
else if (sel == 0x8)
sclk = get_pll_clk(VPLL);
else
return 0;
switch (dev_index) {
case 0:
case 1:
ratio = readl(&clk->div_fsys1);
pre_ratio = readl(&clk->div_fsys1);
break;
case 2:
case 3:
ratio = readl(&clk->div_fsys2);
pre_ratio = readl(&clk->div_fsys2);
break;
case 4:
ratio = readl(&clk->div_fsys3);
pre_ratio = readl(&clk->div_fsys3);
break;
default:
return 0;
}
if (dev_index == 1 || dev_index == 3)
shift = 16;
ratio = (ratio >> shift) & 0xf;
pre_ratio = (pre_ratio >> (shift + 8)) & 0xff;
uclk = (sclk / (ratio + 1)) / (pre_ratio + 1);
return uclk;
}
/* exynos4: set the mmc clock */
static void exynos4_set_mmc_clk(int dev_index, unsigned int div)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
unsigned int addr, clear_bit, set_bit;
/*
* CLK_DIV_FSYS1
* MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
* CLK_DIV_FSYS2
* MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
* CLK_DIV_FSYS3
* MMC4_RATIO [3:0]
*/
if (dev_index < 2) {
addr = (unsigned int)&clk->div_fsys1;
clear_bit = MASK_PRE_RATIO(dev_index);
set_bit = SET_PRE_RATIO(dev_index, div);
} else if (dev_index == 4) {
addr = (unsigned int)&clk->div_fsys3;
dev_index -= 4;
/* MMC4 is controlled with the MMC4_RATIO value */
clear_bit = MASK_RATIO(dev_index);
set_bit = SET_RATIO(dev_index, div);
} else {
addr = (unsigned int)&clk->div_fsys2;
dev_index -= 2;
clear_bit = MASK_PRE_RATIO(dev_index);
set_bit = SET_PRE_RATIO(dev_index, div);
}
clrsetbits_le32(addr, clear_bit, set_bit);
}
/* exynos5: set the mmc clock */
static void exynos5_set_mmc_clk(int dev_index, unsigned int div)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
unsigned int addr;
/*
* CLK_DIV_FSYS1
* MMC0_PRE_RATIO [15:8], MMC1_PRE_RATIO [31:24]
* CLK_DIV_FSYS2
* MMC2_PRE_RATIO [15:8], MMC3_PRE_RATIO [31:24]
*/
if (dev_index < 2) {
addr = (unsigned int)&clk->div_fsys1;
} else {
addr = (unsigned int)&clk->div_fsys2;
dev_index -= 2;
}
clrsetbits_le32(addr, 0xff << ((dev_index << 4) + 8),
(div & 0xff) << ((dev_index << 4) + 8));
}
/* exynos5: set the mmc clock */
static void exynos5420_set_mmc_clk(int dev_index, unsigned int div)
{
struct exynos5420_clock *clk =
(struct exynos5420_clock *)samsung_get_base_clock();
unsigned int addr;
unsigned int shift;
/*
* CLK_DIV_FSYS1
* MMC0_RATIO [9:0]
* MMC1_RATIO [19:10]
* MMC2_RATIO [29:20]
*/
addr = (unsigned int)&clk->div_fsys1;
shift = dev_index * 10;
clrsetbits_le32(addr, 0x3ff << shift, (div & 0x3ff) << shift);
}
/* get_lcd_clk: return lcd clock frequency */
static unsigned long exynos4_get_lcd_clk(void)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
unsigned long pclk, sclk;
unsigned int sel;
unsigned int ratio;
/*
* CLK_SRC_LCD0
* FIMD0_SEL [3:0]
*/
sel = readl(&clk->src_lcd0);
sel = sel & 0xf;
/*
* 0x6: SCLK_MPLL
* 0x7: SCLK_EPLL
* 0x8: SCLK_VPLL
*/
if (sel == 0x6)
sclk = get_pll_clk(MPLL);
else if (sel == 0x7)
sclk = get_pll_clk(EPLL);
else if (sel == 0x8)
sclk = get_pll_clk(VPLL);
else
return 0;
/*
* CLK_DIV_LCD0
* FIMD0_RATIO [3:0]
*/
ratio = readl(&clk->div_lcd0);
ratio = ratio & 0xf;
pclk = sclk / (ratio + 1);
return pclk;
}
/* get_lcd_clk: return lcd clock frequency */
static unsigned long exynos5_get_lcd_clk(void)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
unsigned long pclk, sclk;
unsigned int sel;
unsigned int ratio;
/*
* CLK_SRC_LCD0
* FIMD0_SEL [3:0]
*/
sel = readl(&clk->src_disp1_0);
sel = sel & 0xf;
/*
* 0x6: SCLK_MPLL
* 0x7: SCLK_EPLL
* 0x8: SCLK_VPLL
*/
if (sel == 0x6)
sclk = get_pll_clk(MPLL);
else if (sel == 0x7)
sclk = get_pll_clk(EPLL);
else if (sel == 0x8)
sclk = get_pll_clk(VPLL);
else
return 0;
/*
* CLK_DIV_LCD0
* FIMD0_RATIO [3:0]
*/
ratio = readl(&clk->div_disp1_0);
ratio = ratio & 0xf;
pclk = sclk / (ratio + 1);
return pclk;
}
static unsigned long exynos5420_get_lcd_clk(void)
{
struct exynos5420_clock *clk =
(struct exynos5420_clock *)samsung_get_base_clock();
unsigned long pclk, sclk;
unsigned int sel;
unsigned int ratio;
/*
* CLK_SRC_DISP10
* FIMD1_SEL [4]
* 0: SCLK_RPLL
* 1: SCLK_SPLL
*/
sel = readl(&clk->src_disp10);
sel &= (1 << 4);
if (sel)
sclk = get_pll_clk(SPLL);
else
sclk = get_pll_clk(RPLL);
/*
* CLK_DIV_DISP10
* FIMD1_RATIO [3:0]
*/
ratio = readl(&clk->div_disp10);
ratio = ratio & 0xf;
pclk = sclk / (ratio + 1);
return pclk;
}
static unsigned long exynos5800_get_lcd_clk(void)
{
struct exynos5420_clock *clk =
(struct exynos5420_clock *)samsung_get_base_clock();
unsigned long sclk;
unsigned int sel;
unsigned int ratio;
/*
* CLK_SRC_DISP10
* CLKMUX_FIMD1 [6:4]
*/
sel = (readl(&clk->src_disp10) >> 4) & 0x7;
if (sel) {
/*
* Mapping of CLK_SRC_DISP10 CLKMUX_FIMD1 [6:4] values into
* PLLs. The first element is a placeholder to bypass the
* default settig.
*/
const int reg_map[] = {0, CPLL, DPLL, MPLL, SPLL, IPLL, EPLL,
RPLL};
sclk = get_pll_clk(reg_map[sel]);
} else
sclk = CONFIG_SYS_CLK_FREQ;
/*
* CLK_DIV_DISP10
* FIMD1_RATIO [3:0]
*/
ratio = readl(&clk->div_disp10) & 0xf;
return sclk / (ratio + 1);
}
void exynos4_set_lcd_clk(void)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
/*
* CLK_GATE_BLOCK
* CLK_CAM [0]
* CLK_TV [1]
* CLK_MFC [2]
* CLK_G3D [3]
* CLK_LCD0 [4]
* CLK_LCD1 [5]
* CLK_GPS [7]
*/
setbits_le32(&clk->gate_block, 1 << 4);
/*
* CLK_SRC_LCD0
* FIMD0_SEL [3:0]
* MDNIE0_SEL [7:4]
* MDNIE_PWM0_SEL [8:11]
* MIPI0_SEL [12:15]
* set lcd0 src clock 0x6: SCLK_MPLL
*/
clrsetbits_le32(&clk->src_lcd0, 0xf, 0x6);
/*
* CLK_GATE_IP_LCD0
* CLK_FIMD0 [0]
* CLK_MIE0 [1]
* CLK_MDNIE0 [2]
* CLK_DSIM0 [3]
* CLK_SMMUFIMD0 [4]
* CLK_PPMULCD0 [5]
* Gating all clocks for FIMD0
*/
setbits_le32(&clk->gate_ip_lcd0, 1 << 0);
/*
* CLK_DIV_LCD0
* FIMD0_RATIO [3:0]
* MDNIE0_RATIO [7:4]
* MDNIE_PWM0_RATIO [11:8]
* MDNIE_PWM_PRE_RATIO [15:12]
* MIPI0_RATIO [19:16]
* MIPI0_PRE_RATIO [23:20]
* set fimd ratio
*/
clrsetbits_le32(&clk->div_lcd0, 0xf, 0x1);
}
void exynos5_set_lcd_clk(void)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
/*
* CLK_GATE_BLOCK
* CLK_CAM [0]
* CLK_TV [1]
* CLK_MFC [2]
* CLK_G3D [3]
* CLK_LCD0 [4]
* CLK_LCD1 [5]
* CLK_GPS [7]
*/
setbits_le32(&clk->gate_block, 1 << 4);
/*
* CLK_SRC_LCD0
* FIMD0_SEL [3:0]
* MDNIE0_SEL [7:4]
* MDNIE_PWM0_SEL [8:11]
* MIPI0_SEL [12:15]
* set lcd0 src clock 0x6: SCLK_MPLL
*/
clrsetbits_le32(&clk->src_disp1_0, 0xf, 0x6);
/*
* CLK_GATE_IP_LCD0
* CLK_FIMD0 [0]
* CLK_MIE0 [1]
* CLK_MDNIE0 [2]
* CLK_DSIM0 [3]
* CLK_SMMUFIMD0 [4]
* CLK_PPMULCD0 [5]
* Gating all clocks for FIMD0
*/
setbits_le32(&clk->gate_ip_disp1, 1 << 0);
/*
* CLK_DIV_LCD0
* FIMD0_RATIO [3:0]
* MDNIE0_RATIO [7:4]
* MDNIE_PWM0_RATIO [11:8]
* MDNIE_PWM_PRE_RATIO [15:12]
* MIPI0_RATIO [19:16]
* MIPI0_PRE_RATIO [23:20]
* set fimd ratio
*/
clrsetbits_le32(&clk->div_disp1_0, 0xf, 0x0);
}
void exynos5420_set_lcd_clk(void)
{
struct exynos5420_clock *clk =
(struct exynos5420_clock *)samsung_get_base_clock();
unsigned int cfg;
/*
* CLK_SRC_DISP10
* FIMD1_SEL [4]
* 0: SCLK_RPLL
* 1: SCLK_SPLL
*/
cfg = readl(&clk->src_disp10);
cfg &= ~(0x1 << 4);
cfg |= (0 << 4);
writel(cfg, &clk->src_disp10);
/*
* CLK_DIV_DISP10
* FIMD1_RATIO [3:0]
*/
cfg = readl(&clk->div_disp10);
cfg &= ~(0xf << 0);
cfg |= (0 << 0);
writel(cfg, &clk->div_disp10);
}
void exynos5800_set_lcd_clk(void)
{
struct exynos5420_clock *clk =
(struct exynos5420_clock *)samsung_get_base_clock();
unsigned int cfg;
/*
* Use RPLL for pixel clock
* CLK_SRC_DISP10 CLKMUX_FIMD1 [6:4]
* ==================
* 111: SCLK_RPLL
*/
cfg = readl(&clk->src_disp10) | (0x7 << 4);
writel(cfg, &clk->src_disp10);
/*
* CLK_DIV_DISP10
* FIMD1_RATIO [3:0]
*/
clrsetbits_le32(&clk->div_disp10, 0xf << 0, 0x0 << 0);
}
void exynos4_set_mipi_clk(void)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
/*
* CLK_SRC_LCD0
* FIMD0_SEL [3:0]
* MDNIE0_SEL [7:4]
* MDNIE_PWM0_SEL [8:11]
* MIPI0_SEL [12:15]
* set mipi0 src clock 0x6: SCLK_MPLL
*/
clrsetbits_le32(&clk->src_lcd0, 0xf << 12, 0x6 << 12);
/*
* CLK_SRC_MASK_LCD0
* FIMD0_MASK [0]
* MDNIE0_MASK [4]
* MDNIE_PWM0_MASK [8]
* MIPI0_MASK [12]
* set src mask mipi0 0x1: Unmask
*/
setbits_le32(&clk->src_mask_lcd0, 0x1 << 12);
/*
* CLK_GATE_IP_LCD0
* CLK_FIMD0 [0]
* CLK_MIE0 [1]
* CLK_MDNIE0 [2]
* CLK_DSIM0 [3]
* CLK_SMMUFIMD0 [4]
* CLK_PPMULCD0 [5]
* Gating all clocks for MIPI0
*/
setbits_le32(&clk->gate_ip_lcd0, 1 << 3);
/*
* CLK_DIV_LCD0
* FIMD0_RATIO [3:0]
* MDNIE0_RATIO [7:4]
* MDNIE_PWM0_RATIO [11:8]
* MDNIE_PWM_PRE_RATIO [15:12]
* MIPI0_RATIO [19:16]
* MIPI0_PRE_RATIO [23:20]
* set mipi ratio
*/
clrsetbits_le32(&clk->div_lcd0, 0xf << 16, 0x1 << 16);
}
int exynos5_set_epll_clk(unsigned long rate)
{
unsigned int epll_con, epll_con_k;
unsigned int i;
unsigned int lockcnt;
unsigned int start;
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
epll_con = readl(&clk->epll_con0);
epll_con &= ~((EPLL_CON0_LOCK_DET_EN_MASK <<
EPLL_CON0_LOCK_DET_EN_SHIFT) |
EPLL_CON0_MDIV_MASK << EPLL_CON0_MDIV_SHIFT |
EPLL_CON0_PDIV_MASK << EPLL_CON0_PDIV_SHIFT |
EPLL_CON0_SDIV_MASK << EPLL_CON0_SDIV_SHIFT);
for (i = 0; i < ARRAY_SIZE(exynos5_epll_div); i++) {
if (exynos5_epll_div[i].freq_out == rate)
break;
}
if (i == ARRAY_SIZE(exynos5_epll_div))
return -1;
epll_con_k = exynos5_epll_div[i].k_dsm << 0;
epll_con |= exynos5_epll_div[i].en_lock_det <<
EPLL_CON0_LOCK_DET_EN_SHIFT;
epll_con |= exynos5_epll_div[i].m_div << EPLL_CON0_MDIV_SHIFT;
epll_con |= exynos5_epll_div[i].p_div << EPLL_CON0_PDIV_SHIFT;
epll_con |= exynos5_epll_div[i].s_div << EPLL_CON0_SDIV_SHIFT;
/*
* Required period ( in cycles) to genarate a stable clock output.
* The maximum clock time can be up to 3000 * PDIV cycles of PLLs
* frequency input (as per spec)
*/
lockcnt = 3000 * exynos5_epll_div[i].p_div;
writel(lockcnt, &clk->epll_lock);
writel(epll_con, &clk->epll_con0);
writel(epll_con_k, &clk->epll_con1);
start = get_timer(0);
while (!(readl(&clk->epll_con0) &
(0x1 << EXYNOS5_EPLLCON0_LOCKED_SHIFT))) {
if (get_timer(start) > TIMEOUT_EPLL_LOCK) {
debug("%s: Timeout waiting for EPLL lock\n", __func__);
return -1;
}
}
return 0;
}
int exynos5_set_i2s_clk_source(unsigned int i2s_id)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
unsigned int *audio_ass = (unsigned int *)samsung_get_base_audio_ass();
if (i2s_id == 0) {
setbits_le32(&clk->src_top2, CLK_SRC_MOUT_EPLL);
clrsetbits_le32(&clk->src_mau, AUDIO0_SEL_MASK,
(CLK_SRC_SCLK_EPLL));
setbits_le32(audio_ass, AUDIO_CLKMUX_ASS);
} else if (i2s_id == 1) {
clrsetbits_le32(&clk->src_peric1, AUDIO1_SEL_MASK,
(CLK_SRC_SCLK_EPLL));
} else {
return -1;
}
return 0;
}
int exynos5_set_i2s_clk_prescaler(unsigned int src_frq,
unsigned int dst_frq,
unsigned int i2s_id)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
unsigned int div;
if ((dst_frq == 0) || (src_frq == 0)) {
debug("%s: Invalid requency input for prescaler\n", __func__);
debug("src frq = %d des frq = %d ", src_frq, dst_frq);
return -1;
}
div = (src_frq / dst_frq);
if (i2s_id == 0) {
if (div > AUDIO_0_RATIO_MASK) {
debug("%s: Frequency ratio is out of range\n",
__func__);
debug("src frq = %d des frq = %d ", src_frq, dst_frq);
return -1;
}
clrsetbits_le32(&clk->div_mau, AUDIO_0_RATIO_MASK,
(div & AUDIO_0_RATIO_MASK));
} else if (i2s_id == 1) {
if (div > AUDIO_1_RATIO_MASK) {
debug("%s: Frequency ratio is out of range\n",
__func__);
debug("src frq = %d des frq = %d ", src_frq, dst_frq);
return -1;
}
clrsetbits_le32(&clk->div_peric4, AUDIO_1_RATIO_MASK,
(div & AUDIO_1_RATIO_MASK));
} else {
return -1;
}
return 0;
}
/**
* Linearly searches for the most accurate main and fine stage clock scalars
* (divisors) for a specified target frequency and scalar bit sizes by checking
* all multiples of main_scalar_bits values. Will always return scalars up to or
* slower than target.
*
* @param main_scalar_bits Number of main scalar bits, must be > 0 and < 32
* @param fine_scalar_bits Number of fine scalar bits, must be > 0 and < 32
* @param input_freq Clock frequency to be scaled in Hz
* @param target_freq Desired clock frequency in Hz
* @param best_fine_scalar Pointer to store the fine stage divisor
*
* @return best_main_scalar Main scalar for desired frequency or -1 if none
* found
*/
static int clock_calc_best_scalar(unsigned int main_scaler_bits,
unsigned int fine_scalar_bits, unsigned int input_rate,
unsigned int target_rate, unsigned int *best_fine_scalar)
{
int i;
int best_main_scalar = -1;
unsigned int best_error = target_rate;
const unsigned int cap = (1 << fine_scalar_bits) - 1;
const unsigned int loops = 1 << main_scaler_bits;
debug("Input Rate is %u, Target is %u, Cap is %u\n", input_rate,
target_rate, cap);
assert(best_fine_scalar != NULL);
assert(main_scaler_bits <= fine_scalar_bits);
*best_fine_scalar = 1;
if (input_rate == 0 || target_rate == 0)
return -1;
if (target_rate >= input_rate)
return 1;
for (i = 1; i <= loops; i++) {
const unsigned int effective_div =
max(min(input_rate / i / target_rate, cap), 1U);
const unsigned int effective_rate = input_rate / i /
effective_div;
const int error = target_rate - effective_rate;
debug("%d|effdiv:%u, effrate:%u, error:%d\n", i, effective_div,
effective_rate, error);
if (error >= 0 && error <= best_error) {
best_error = error;
best_main_scalar = i;
*best_fine_scalar = effective_div;
}
}
return best_main_scalar;
}
static int exynos5_set_spi_clk(enum periph_id periph_id,
unsigned int rate)
{
struct exynos5_clock *clk =
(struct exynos5_clock *)samsung_get_base_clock();
int main;
unsigned int fine;
unsigned shift, pre_shift;
unsigned mask = 0xff;
u32 *reg;
main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
if (main < 0) {
debug("%s: Cannot set clock rate for periph %d",
__func__, periph_id);
return -1;
}
main = main - 1;
fine = fine - 1;
switch (periph_id) {
case PERIPH_ID_SPI0:
reg = &clk->div_peric1;
shift = 0;
pre_shift = 8;
break;
case PERIPH_ID_SPI1:
reg = &clk->div_peric1;
shift = 16;
pre_shift = 24;
break;
case PERIPH_ID_SPI2:
reg = &clk->div_peric2;
shift = 0;
pre_shift = 8;
break;
case PERIPH_ID_SPI3:
reg = &clk->sclk_div_isp;
shift = 0;
pre_shift = 4;
break;
case PERIPH_ID_SPI4:
reg = &clk->sclk_div_isp;
shift = 12;
pre_shift = 16;
break;
default:
debug("%s: Unsupported peripheral ID %d\n", __func__,
periph_id);
return -1;
}
clrsetbits_le32(reg, mask << shift, (main & mask) << shift);
clrsetbits_le32(reg, mask << pre_shift, (fine & mask) << pre_shift);
return 0;
}
static int exynos5420_set_spi_clk(enum periph_id periph_id,
unsigned int rate)
{
struct exynos5420_clock *clk =
(struct exynos5420_clock *)samsung_get_base_clock();
int main;
unsigned int fine;
unsigned shift, pre_shift;
unsigned div_mask = 0xf, pre_div_mask = 0xff;
u32 *reg;
u32 *pre_reg;
main = clock_calc_best_scalar(4, 8, 400000000, rate, &fine);
if (main < 0) {
debug("%s: Cannot set clock rate for periph %d",
__func__, periph_id);
return -1;
}
main = main - 1;
fine = fine - 1;
switch (periph_id) {
case PERIPH_ID_SPI0:
reg = &clk->div_peric1;
shift = 20;
pre_reg = &clk->div_peric4;
pre_shift = 8;
break;
case PERIPH_ID_SPI1:
reg = &clk->div_peric1;
shift = 24;
pre_reg = &clk->div_peric4;
pre_shift = 16;
break;
case PERIPH_ID_SPI2:
reg = &clk->div_peric1;
shift = 28;
pre_reg = &clk->div_peric4;
pre_shift = 24;
break;
case PERIPH_ID_SPI3:
reg = &clk->div_isp1;
shift = 16;
pre_reg = &clk->div_isp1;
pre_shift = 0;
break;
case PERIPH_ID_SPI4:
reg = &clk->div_isp1;
shift = 20;
pre_reg = &clk->div_isp1;
pre_shift = 8;
break;
default:
debug("%s: Unsupported peripheral ID %d\n", __func__,
periph_id);
return -1;
}
clrsetbits_le32(reg, div_mask << shift, (main & div_mask) << shift);
clrsetbits_le32(pre_reg, pre_div_mask << pre_shift,
(fine & pre_div_mask) << pre_shift);
return 0;
}
static unsigned long exynos4_get_i2c_clk(void)
{
struct exynos4_clock *clk =
(struct exynos4_clock *)samsung_get_base_clock();
unsigned long sclk, aclk_100;
unsigned int ratio;
sclk = get_pll_clk(APLL);
ratio = (readl(&clk->div_top)) >> 4;
ratio &= 0xf;
aclk_100 = sclk / (ratio + 1);
return aclk_100;
}
unsigned long get_pll_clk(int pllreg)
{
if (cpu_is_exynos5()) {
if (proid_is_exynos5420() || proid_is_exynos5422())
return exynos542x_get_pll_clk(pllreg);
return exynos5_get_pll_clk(pllreg);
} else if (cpu_is_exynos4()) {
if (proid_is_exynos4412())
return exynos4x12_get_pll_clk(pllreg);
return exynos4_get_pll_clk(pllreg);
}
return 0;
}
unsigned long get_arm_clk(void)
{
if (cpu_is_exynos5()) {
return exynos5_get_arm_clk();
} else if (cpu_is_exynos4()) {
if (proid_is_exynos4412())
return exynos4x12_get_arm_clk();
return exynos4_get_arm_clk();
}
return 0;
}
unsigned long get_i2c_clk(void)
{
if (cpu_is_exynos5())
return clock_get_periph_rate(PERIPH_ID_I2C0);
else if (cpu_is_exynos4())
return exynos4_get_i2c_clk();
return 0;
}
unsigned long get_pwm_clk(void)
{
if (cpu_is_exynos5()) {
return clock_get_periph_rate(PERIPH_ID_PWM0);
} else if (cpu_is_exynos4()) {
if (proid_is_exynos4412())
return exynos4x12_get_pwm_clk();
return exynos4_get_pwm_clk();
}
return 0;
}
unsigned long get_uart_clk(int dev_index)
{
enum periph_id id;
switch (dev_index) {
case 0:
id = PERIPH_ID_UART0;
break;
case 1:
id = PERIPH_ID_UART1;
break;
case 2:
id = PERIPH_ID_UART2;
break;
case 3:
id = PERIPH_ID_UART3;
break;
default:
debug("%s: invalid UART index %d", __func__, dev_index);
return -1;
}
if (cpu_is_exynos5()) {
return clock_get_periph_rate(id);
} else if (cpu_is_exynos4()) {
if (proid_is_exynos4412())
return exynos4x12_get_uart_clk(dev_index);
return exynos4_get_uart_clk(dev_index);
}
return 0;
}
unsigned long get_mmc_clk(int dev_index)
{
enum periph_id id;
if (cpu_is_exynos4())
return exynos4_get_mmc_clk(dev_index);
switch (dev_index) {
case 0:
id = PERIPH_ID_SDMMC0;
break;
case 1:
id = PERIPH_ID_SDMMC1;
break;
case 2:
id = PERIPH_ID_SDMMC2;
break;
case 3:
id = PERIPH_ID_SDMMC3;
break;
default:
debug("%s: invalid MMC index %d", __func__, dev_index);
return -1;
}
return clock_get_periph_rate(id);
}
void set_mmc_clk(int dev_index, unsigned int div)
{
/* If want to set correct value, it needs to substract one from div.*/
if (div > 0)
div -= 1;
if (cpu_is_exynos5()) {
if (proid_is_exynos5420() || proid_is_exynos5422())
exynos5420_set_mmc_clk(dev_index, div);
else
exynos5_set_mmc_clk(dev_index, div);
} else if (cpu_is_exynos4()) {
exynos4_set_mmc_clk(dev_index, div);
}
}
unsigned long get_lcd_clk(void)
{
if (cpu_is_exynos4()) {
return exynos4_get_lcd_clk();
} else if (cpu_is_exynos5()) {
if (proid_is_exynos5420())
return exynos5420_get_lcd_clk();
else if (proid_is_exynos5422())
return exynos5800_get_lcd_clk();
else
return exynos5_get_lcd_clk();
}
return 0;
}
void set_lcd_clk(void)
{
if (cpu_is_exynos4()) {
exynos4_set_lcd_clk();
} else if (cpu_is_exynos5()) {
if (proid_is_exynos5250())
exynos5_set_lcd_clk();
else if (proid_is_exynos5420())
exynos5420_set_lcd_clk();
else
exynos5800_set_lcd_clk();
}
}
void set_mipi_clk(void)
{
if (cpu_is_exynos4())
exynos4_set_mipi_clk();
}
int set_spi_clk(int periph_id, unsigned int rate)
{
if (cpu_is_exynos5()) {
if (proid_is_exynos5420() || proid_is_exynos5422())
return exynos5420_set_spi_clk(periph_id, rate);
return exynos5_set_spi_clk(periph_id, rate);
}
return 0;
}
int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq,
unsigned int i2s_id)
{
if (cpu_is_exynos5())
return exynos5_set_i2s_clk_prescaler(src_frq, dst_frq, i2s_id);
return 0;
}
int set_i2s_clk_source(unsigned int i2s_id)
{
if (cpu_is_exynos5())
return exynos5_set_i2s_clk_source(i2s_id);
return 0;
}
int set_epll_clk(unsigned long rate)
{
if (cpu_is_exynos5())
return exynos5_set_epll_clk(rate);
return 0;
}
Reference in a new issue View git blame Copy permalink