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linux/drivers/clk/samsung/clk-pll.c
Sam Protsenko f2819ea168 clk: samsung: clk-pll: Implement pll0818x PLL type 
pll0818x PLL is used in Exynos850 SoC for CMU_G3D PLL. Operation-wise,
pll0818x is the same as pll0822x. The only difference is:
  - pl0822x is integer PLL with Middle FVCO (950 to 2400 MHz)
  - pl0818x is integer PLL with Low FVCO (600 to 1200 MHz)

Add pll0818x type as an alias to pll0822x.

Reviewed-by: Chanho Park <chanho61.park@samsung.com>
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20230223042133.26551-4-semen.protsenko@linaro.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
2023-03-06 16:57:15 +01:00

1422 lines
39 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
* Copyright (c) 2013 Linaro Ltd.
*
* This file contains the utility functions to register the pll clocks.
*/
#include <linux/errno.h>
#include <linux/hrtimer.h>
#include <linux/iopoll.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/timekeeping.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include "clk.h"
#include "clk-pll.h"
#define PLL_TIMEOUT_US 20000U
#define PLL_TIMEOUT_LOOPS 1000000U
struct samsung_clk_pll {
struct clk_hw hw;
void __iomem *lock_reg;
void __iomem *con_reg;
/* PLL enable control bit offset in @con_reg register */
unsigned short enable_offs;
/* PLL lock status bit offset in @con_reg register */
unsigned short lock_offs;
enum samsung_pll_type type;
unsigned int rate_count;
const struct samsung_pll_rate_table *rate_table;
};
#define to_clk_pll(_hw) container_of(_hw, struct samsung_clk_pll, hw)
static const struct samsung_pll_rate_table *samsung_get_pll_settings(
struct samsung_clk_pll *pll, unsigned long rate)
{
const struct samsung_pll_rate_table *rate_table = pll->rate_table;
int i;
for (i = 0; i < pll->rate_count; i++) {
if (rate == rate_table[i].rate)
return &rate_table[i];
}
return NULL;
}
static long samsung_pll_round_rate(struct clk_hw *hw,
unsigned long drate, unsigned long *prate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
const struct samsung_pll_rate_table *rate_table = pll->rate_table;
int i;
/* Assumming rate_table is in descending order */
for (i = 0; i < pll->rate_count; i++) {
if (drate >= rate_table[i].rate)
return rate_table[i].rate;
}
/* return minimum supported value */
return rate_table[i - 1].rate;
}
static bool pll_early_timeout = true;
static int __init samsung_pll_disable_early_timeout(void)
{
pll_early_timeout = false;
return 0;
}
arch_initcall(samsung_pll_disable_early_timeout);
/* Wait until the PLL is locked */
static int samsung_pll_lock_wait(struct samsung_clk_pll *pll,
unsigned int reg_mask)
{
int i, ret;
u32 val;
/*
* This function might be called when the timekeeping API can't be used
* to detect timeouts. One situation is when the clocksource is not yet
* initialized, another when the timekeeping is suspended. udelay() also
* cannot be used when the clocksource is not running on arm64, since
* the current timer is used as cycle counter. So a simple busy loop
* is used here in that special cases. The limit of iterations has been
* derived from experimental measurements of various PLLs on multiple
* Exynos SoC variants. Single register read time was usually in range
* 0.4...1.5 us, never less than 0.4 us.
*/
if (pll_early_timeout || timekeeping_suspended) {
i = PLL_TIMEOUT_LOOPS;
while (i-- > 0) {
if (readl_relaxed(pll->con_reg) & reg_mask)
return 0;
cpu_relax();
}
ret = -ETIMEDOUT;
} else {
ret = readl_relaxed_poll_timeout_atomic(pll->con_reg, val,
val & reg_mask, 0, PLL_TIMEOUT_US);
}
if (ret < 0)
pr_err("Could not lock PLL %s\n", clk_hw_get_name(&pll->hw));
return ret;
}
static int samsung_pll3xxx_enable(struct clk_hw *hw)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 tmp;
tmp = readl_relaxed(pll->con_reg);
tmp |= BIT(pll->enable_offs);
writel_relaxed(tmp, pll->con_reg);
return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
}
static void samsung_pll3xxx_disable(struct clk_hw *hw)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 tmp;
tmp = readl_relaxed(pll->con_reg);
tmp &= ~BIT(pll->enable_offs);
writel_relaxed(tmp, pll->con_reg);
}
/*
* PLL2126 Clock Type
*/
#define PLL2126_MDIV_MASK (0xff)
#define PLL2126_PDIV_MASK (0x3f)
#define PLL2126_SDIV_MASK (0x3)
#define PLL2126_MDIV_SHIFT (16)
#define PLL2126_PDIV_SHIFT (8)
#define PLL2126_SDIV_SHIFT (0)
static unsigned long samsung_pll2126_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 pll_con, mdiv, pdiv, sdiv;
u64 fvco = parent_rate;
pll_con = readl_relaxed(pll->con_reg);
mdiv = (pll_con >> PLL2126_MDIV_SHIFT) & PLL2126_MDIV_MASK;
pdiv = (pll_con >> PLL2126_PDIV_SHIFT) & PLL2126_PDIV_MASK;
sdiv = (pll_con >> PLL2126_SDIV_SHIFT) & PLL2126_SDIV_MASK;
fvco *= (mdiv + 8);
do_div(fvco, (pdiv + 2) << sdiv);
return (unsigned long)fvco;
}
static const struct clk_ops samsung_pll2126_clk_ops = {
.recalc_rate = samsung_pll2126_recalc_rate,
};
/*
* PLL3000 Clock Type
*/
#define PLL3000_MDIV_MASK (0xff)
#define PLL3000_PDIV_MASK (0x3)
#define PLL3000_SDIV_MASK (0x3)
#define PLL3000_MDIV_SHIFT (16)
#define PLL3000_PDIV_SHIFT (8)
#define PLL3000_SDIV_SHIFT (0)
static unsigned long samsung_pll3000_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 pll_con, mdiv, pdiv, sdiv;
u64 fvco = parent_rate;
pll_con = readl_relaxed(pll->con_reg);
mdiv = (pll_con >> PLL3000_MDIV_SHIFT) & PLL3000_MDIV_MASK;
pdiv = (pll_con >> PLL3000_PDIV_SHIFT) & PLL3000_PDIV_MASK;
sdiv = (pll_con >> PLL3000_SDIV_SHIFT) & PLL3000_SDIV_MASK;
fvco *= (2 * (mdiv + 8));
do_div(fvco, pdiv << sdiv);
return (unsigned long)fvco;
}
static const struct clk_ops samsung_pll3000_clk_ops = {
.recalc_rate = samsung_pll3000_recalc_rate,
};
/*
* PLL35xx Clock Type
*/
/* Maximum lock time can be 270 * PDIV cycles */
#define PLL35XX_LOCK_FACTOR (270)
#define PLL35XX_MDIV_MASK (0x3FF)
#define PLL35XX_PDIV_MASK (0x3F)
#define PLL35XX_SDIV_MASK (0x7)
#define PLL35XX_MDIV_SHIFT (16)
#define PLL35XX_PDIV_SHIFT (8)
#define PLL35XX_SDIV_SHIFT (0)
#define PLL35XX_LOCK_STAT_SHIFT (29)
#define PLL35XX_ENABLE_SHIFT (31)
static unsigned long samsung_pll35xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con;
u64 fvco = parent_rate;
pll_con = readl_relaxed(pll->con_reg);
mdiv = (pll_con >> PLL35XX_MDIV_SHIFT) & PLL35XX_MDIV_MASK;
pdiv = (pll_con >> PLL35XX_PDIV_SHIFT) & PLL35XX_PDIV_MASK;
sdiv = (pll_con >> PLL35XX_SDIV_SHIFT) & PLL35XX_SDIV_MASK;
fvco *= mdiv;
do_div(fvco, (pdiv << sdiv));
return (unsigned long)fvco;
}
static inline bool samsung_pll35xx_mp_change(
const struct samsung_pll_rate_table *rate, u32 pll_con)
{
u32 old_mdiv, old_pdiv;
old_mdiv = (pll_con >> PLL35XX_MDIV_SHIFT) & PLL35XX_MDIV_MASK;
old_pdiv = (pll_con >> PLL35XX_PDIV_SHIFT) & PLL35XX_PDIV_MASK;
return (rate->mdiv != old_mdiv || rate->pdiv != old_pdiv);
}
static int samsung_pll35xx_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
const struct samsung_pll_rate_table *rate;
u32 tmp;
/* Get required rate settings from table */
rate = samsung_get_pll_settings(pll, drate);
if (!rate) {
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
drate, clk_hw_get_name(hw));
return -EINVAL;
}
tmp = readl_relaxed(pll->con_reg);
if (!(samsung_pll35xx_mp_change(rate, tmp))) {
/* If only s change, change just s value only*/
tmp &= ~(PLL35XX_SDIV_MASK << PLL35XX_SDIV_SHIFT);
tmp |= rate->sdiv << PLL35XX_SDIV_SHIFT;
writel_relaxed(tmp, pll->con_reg);
return 0;
}
/* Set PLL lock time. */
writel_relaxed(rate->pdiv * PLL35XX_LOCK_FACTOR,
pll->lock_reg);
/* Change PLL PMS values */
tmp &= ~((PLL35XX_MDIV_MASK << PLL35XX_MDIV_SHIFT) |
(PLL35XX_PDIV_MASK << PLL35XX_PDIV_SHIFT) |
(PLL35XX_SDIV_MASK << PLL35XX_SDIV_SHIFT));
tmp |= (rate->mdiv << PLL35XX_MDIV_SHIFT) |
(rate->pdiv << PLL35XX_PDIV_SHIFT) |
(rate->sdiv << PLL35XX_SDIV_SHIFT);
writel_relaxed(tmp, pll->con_reg);
/* Wait for PLL lock if the PLL is enabled */
if (tmp & BIT(pll->enable_offs))
return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
return 0;
}
static const struct clk_ops samsung_pll35xx_clk_ops = {
.recalc_rate = samsung_pll35xx_recalc_rate,
.round_rate = samsung_pll_round_rate,
.set_rate = samsung_pll35xx_set_rate,
.enable = samsung_pll3xxx_enable,
.disable = samsung_pll3xxx_disable,
};
static const struct clk_ops samsung_pll35xx_clk_min_ops = {
.recalc_rate = samsung_pll35xx_recalc_rate,
};
/*
* PLL36xx Clock Type
*/
/* Maximum lock time can be 3000 * PDIV cycles */
#define PLL36XX_LOCK_FACTOR (3000)
#define PLL36XX_KDIV_MASK (0xFFFF)
#define PLL36XX_MDIV_MASK (0x1FF)
#define PLL36XX_PDIV_MASK (0x3F)
#define PLL36XX_SDIV_MASK (0x7)
#define PLL36XX_MDIV_SHIFT (16)
#define PLL36XX_PDIV_SHIFT (8)
#define PLL36XX_SDIV_SHIFT (0)
#define PLL36XX_KDIV_SHIFT (0)
#define PLL36XX_LOCK_STAT_SHIFT (29)
#define PLL36XX_ENABLE_SHIFT (31)
static unsigned long samsung_pll36xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con0, pll_con1;
s16 kdiv;
u64 fvco = parent_rate;
pll_con0 = readl_relaxed(pll->con_reg);
pll_con1 = readl_relaxed(pll->con_reg + 4);
mdiv = (pll_con0 >> PLL36XX_MDIV_SHIFT) & PLL36XX_MDIV_MASK;
pdiv = (pll_con0 >> PLL36XX_PDIV_SHIFT) & PLL36XX_PDIV_MASK;
sdiv = (pll_con0 >> PLL36XX_SDIV_SHIFT) & PLL36XX_SDIV_MASK;
kdiv = (s16)(pll_con1 & PLL36XX_KDIV_MASK);
fvco *= (mdiv << 16) + kdiv;
do_div(fvco, (pdiv << sdiv));
fvco >>= 16;
return (unsigned long)fvco;
}
static inline bool samsung_pll36xx_mpk_change(
const struct samsung_pll_rate_table *rate, u32 pll_con0, u32 pll_con1)
{
u32 old_mdiv, old_pdiv, old_kdiv;
old_mdiv = (pll_con0 >> PLL36XX_MDIV_SHIFT) & PLL36XX_MDIV_MASK;
old_pdiv = (pll_con0 >> PLL36XX_PDIV_SHIFT) & PLL36XX_PDIV_MASK;
old_kdiv = (pll_con1 >> PLL36XX_KDIV_SHIFT) & PLL36XX_KDIV_MASK;
return (rate->mdiv != old_mdiv || rate->pdiv != old_pdiv ||
rate->kdiv != old_kdiv);
}
static int samsung_pll36xx_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 pll_con0, pll_con1;
const struct samsung_pll_rate_table *rate;
rate = samsung_get_pll_settings(pll, drate);
if (!rate) {
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
drate, clk_hw_get_name(hw));
return -EINVAL;
}
pll_con0 = readl_relaxed(pll->con_reg);
pll_con1 = readl_relaxed(pll->con_reg + 4);
if (!(samsung_pll36xx_mpk_change(rate, pll_con0, pll_con1))) {
/* If only s change, change just s value only*/
pll_con0 &= ~(PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT);
pll_con0 |= (rate->sdiv << PLL36XX_SDIV_SHIFT);
writel_relaxed(pll_con0, pll->con_reg);
return 0;
}
/* Set PLL lock time. */
writel_relaxed(rate->pdiv * PLL36XX_LOCK_FACTOR, pll->lock_reg);
/* Change PLL PMS values */
pll_con0 &= ~((PLL36XX_MDIV_MASK << PLL36XX_MDIV_SHIFT) |
(PLL36XX_PDIV_MASK << PLL36XX_PDIV_SHIFT) |
(PLL36XX_SDIV_MASK << PLL36XX_SDIV_SHIFT));
pll_con0 |= (rate->mdiv << PLL36XX_MDIV_SHIFT) |
(rate->pdiv << PLL36XX_PDIV_SHIFT) |
(rate->sdiv << PLL36XX_SDIV_SHIFT);
writel_relaxed(pll_con0, pll->con_reg);
pll_con1 &= ~(PLL36XX_KDIV_MASK << PLL36XX_KDIV_SHIFT);
pll_con1 |= rate->kdiv << PLL36XX_KDIV_SHIFT;
writel_relaxed(pll_con1, pll->con_reg + 4);
if (pll_con0 & BIT(pll->enable_offs))
return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
return 0;
}
static const struct clk_ops samsung_pll36xx_clk_ops = {
.recalc_rate = samsung_pll36xx_recalc_rate,
.set_rate = samsung_pll36xx_set_rate,
.round_rate = samsung_pll_round_rate,
.enable = samsung_pll3xxx_enable,
.disable = samsung_pll3xxx_disable,
};
static const struct clk_ops samsung_pll36xx_clk_min_ops = {
.recalc_rate = samsung_pll36xx_recalc_rate,
};
/*
* PLL0822x Clock Type
*/
/* Maximum lock time can be 150 * PDIV cycles */
#define PLL0822X_LOCK_FACTOR (150)
#define PLL0822X_MDIV_MASK (0x3FF)
#define PLL0822X_PDIV_MASK (0x3F)
#define PLL0822X_SDIV_MASK (0x7)
#define PLL0822X_MDIV_SHIFT (16)
#define PLL0822X_PDIV_SHIFT (8)
#define PLL0822X_SDIV_SHIFT (0)
#define PLL0822X_LOCK_STAT_SHIFT (29)
#define PLL0822X_ENABLE_SHIFT (31)
static unsigned long samsung_pll0822x_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con3;
u64 fvco = parent_rate;
pll_con3 = readl_relaxed(pll->con_reg);
mdiv = (pll_con3 >> PLL0822X_MDIV_SHIFT) & PLL0822X_MDIV_MASK;
pdiv = (pll_con3 >> PLL0822X_PDIV_SHIFT) & PLL0822X_PDIV_MASK;
sdiv = (pll_con3 >> PLL0822X_SDIV_SHIFT) & PLL0822X_SDIV_MASK;
fvco *= mdiv;
do_div(fvco, (pdiv << sdiv));
return (unsigned long)fvco;
}
static int samsung_pll0822x_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
const struct samsung_pll_rate_table *rate;
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 pll_con3;
/* Get required rate settings from table */
rate = samsung_get_pll_settings(pll, drate);
if (!rate) {
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
drate, clk_hw_get_name(hw));
return -EINVAL;
}
/* Change PLL PMS values */
pll_con3 = readl_relaxed(pll->con_reg);
pll_con3 &= ~((PLL0822X_MDIV_MASK << PLL0822X_MDIV_SHIFT) |
(PLL0822X_PDIV_MASK << PLL0822X_PDIV_SHIFT) |
(PLL0822X_SDIV_MASK << PLL0822X_SDIV_SHIFT));
pll_con3 |= (rate->mdiv << PLL0822X_MDIV_SHIFT) |
(rate->pdiv << PLL0822X_PDIV_SHIFT) |
(rate->sdiv << PLL0822X_SDIV_SHIFT);
/* Set PLL lock time */
writel_relaxed(rate->pdiv * PLL0822X_LOCK_FACTOR,
pll->lock_reg);
/* Write PMS values */
writel_relaxed(pll_con3, pll->con_reg);
/* Wait for PLL lock if the PLL is enabled */
if (pll_con3 & BIT(pll->enable_offs))
return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
return 0;
}
static const struct clk_ops samsung_pll0822x_clk_ops = {
.recalc_rate = samsung_pll0822x_recalc_rate,
.round_rate = samsung_pll_round_rate,
.set_rate = samsung_pll0822x_set_rate,
.enable = samsung_pll3xxx_enable,
.disable = samsung_pll3xxx_disable,
};
static const struct clk_ops samsung_pll0822x_clk_min_ops = {
.recalc_rate = samsung_pll0822x_recalc_rate,
};
/*
* PLL0831x Clock Type
*/
/* Maximum lock time can be 500 * PDIV cycles */
#define PLL0831X_LOCK_FACTOR (500)
#define PLL0831X_KDIV_MASK (0xFFFF)
#define PLL0831X_MDIV_MASK (0x1FF)
#define PLL0831X_PDIV_MASK (0x3F)
#define PLL0831X_SDIV_MASK (0x7)
#define PLL0831X_MDIV_SHIFT (16)
#define PLL0831X_PDIV_SHIFT (8)
#define PLL0831X_SDIV_SHIFT (0)
#define PLL0831X_KDIV_SHIFT (0)
#define PLL0831X_LOCK_STAT_SHIFT (29)
#define PLL0831X_ENABLE_SHIFT (31)
static unsigned long samsung_pll0831x_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con3, pll_con5;
s16 kdiv;
u64 fvco = parent_rate;
pll_con3 = readl_relaxed(pll->con_reg);
pll_con5 = readl_relaxed(pll->con_reg + 8);
mdiv = (pll_con3 >> PLL0831X_MDIV_SHIFT) & PLL0831X_MDIV_MASK;
pdiv = (pll_con3 >> PLL0831X_PDIV_SHIFT) & PLL0831X_PDIV_MASK;
sdiv = (pll_con3 >> PLL0831X_SDIV_SHIFT) & PLL0831X_SDIV_MASK;
kdiv = (s16)((pll_con5 >> PLL0831X_KDIV_SHIFT) & PLL0831X_KDIV_MASK);
fvco *= (mdiv << 16) + kdiv;
do_div(fvco, (pdiv << sdiv));
fvco >>= 16;
return (unsigned long)fvco;
}
static int samsung_pll0831x_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long parent_rate)
{
const struct samsung_pll_rate_table *rate;
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 pll_con3, pll_con5;
/* Get required rate settings from table */
rate = samsung_get_pll_settings(pll, drate);
if (!rate) {
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
drate, clk_hw_get_name(hw));
return -EINVAL;
}
pll_con3 = readl_relaxed(pll->con_reg);
pll_con5 = readl_relaxed(pll->con_reg + 8);
/* Change PLL PMSK values */
pll_con3 &= ~((PLL0831X_MDIV_MASK << PLL0831X_MDIV_SHIFT) |
(PLL0831X_PDIV_MASK << PLL0831X_PDIV_SHIFT) |
(PLL0831X_SDIV_MASK << PLL0831X_SDIV_SHIFT));
pll_con3 |= (rate->mdiv << PLL0831X_MDIV_SHIFT) |
(rate->pdiv << PLL0831X_PDIV_SHIFT) |
(rate->sdiv << PLL0831X_SDIV_SHIFT);
pll_con5 &= ~(PLL0831X_KDIV_MASK << PLL0831X_KDIV_SHIFT);
/*
* kdiv is 16-bit 2's complement (s16), but stored as unsigned int.
* Cast it to u16 to avoid leading 0xffff's in case of negative value.
*/
pll_con5 |= ((u16)rate->kdiv << PLL0831X_KDIV_SHIFT);
/* Set PLL lock time */
writel_relaxed(rate->pdiv * PLL0831X_LOCK_FACTOR, pll->lock_reg);
/* Write PMSK values */
writel_relaxed(pll_con3, pll->con_reg);
writel_relaxed(pll_con5, pll->con_reg + 8);
/* Wait for PLL lock if the PLL is enabled */
if (pll_con3 & BIT(pll->enable_offs))
return samsung_pll_lock_wait(pll, BIT(pll->lock_offs));
return 0;
}
static const struct clk_ops samsung_pll0831x_clk_ops = {
.recalc_rate = samsung_pll0831x_recalc_rate,
.set_rate = samsung_pll0831x_set_rate,
.round_rate = samsung_pll_round_rate,
.enable = samsung_pll3xxx_enable,
.disable = samsung_pll3xxx_disable,
};
static const struct clk_ops samsung_pll0831x_clk_min_ops = {
.recalc_rate = samsung_pll0831x_recalc_rate,
};
/*
* PLL45xx Clock Type
*/
#define PLL4502_LOCK_FACTOR 400
#define PLL4508_LOCK_FACTOR 240
#define PLL45XX_MDIV_MASK (0x3FF)
#define PLL45XX_PDIV_MASK (0x3F)
#define PLL45XX_SDIV_MASK (0x7)
#define PLL45XX_AFC_MASK (0x1F)
#define PLL45XX_MDIV_SHIFT (16)
#define PLL45XX_PDIV_SHIFT (8)
#define PLL45XX_SDIV_SHIFT (0)
#define PLL45XX_AFC_SHIFT (0)
#define PLL45XX_ENABLE BIT(31)
#define PLL45XX_LOCKED BIT(29)
static unsigned long samsung_pll45xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con;
u64 fvco = parent_rate;
pll_con = readl_relaxed(pll->con_reg);
mdiv = (pll_con >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
pdiv = (pll_con >> PLL45XX_PDIV_SHIFT) & PLL45XX_PDIV_MASK;
sdiv = (pll_con >> PLL45XX_SDIV_SHIFT) & PLL45XX_SDIV_MASK;
if (pll->type == pll_4508)
sdiv = sdiv - 1;
fvco *= mdiv;
do_div(fvco, (pdiv << sdiv));
return (unsigned long)fvco;
}
static bool samsung_pll45xx_mp_change(u32 pll_con0, u32 pll_con1,
const struct samsung_pll_rate_table *rate)
{
u32 old_mdiv, old_pdiv, old_afc;
old_mdiv = (pll_con0 >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
old_pdiv = (pll_con0 >> PLL45XX_PDIV_SHIFT) & PLL45XX_PDIV_MASK;
old_afc = (pll_con1 >> PLL45XX_AFC_SHIFT) & PLL45XX_AFC_MASK;
return (old_mdiv != rate->mdiv || old_pdiv != rate->pdiv
|| old_afc != rate->afc);
}
static int samsung_pll45xx_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
const struct samsung_pll_rate_table *rate;
u32 con0, con1;
/* Get required rate settings from table */
rate = samsung_get_pll_settings(pll, drate);
if (!rate) {
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
drate, clk_hw_get_name(hw));
return -EINVAL;
}
con0 = readl_relaxed(pll->con_reg);
con1 = readl_relaxed(pll->con_reg + 0x4);
if (!(samsung_pll45xx_mp_change(con0, con1, rate))) {
/* If only s change, change just s value only*/
con0 &= ~(PLL45XX_SDIV_MASK << PLL45XX_SDIV_SHIFT);
con0 |= rate->sdiv << PLL45XX_SDIV_SHIFT;
writel_relaxed(con0, pll->con_reg);
return 0;
}
/* Set PLL PMS values. */
con0 &= ~((PLL45XX_MDIV_MASK << PLL45XX_MDIV_SHIFT) |
(PLL45XX_PDIV_MASK << PLL45XX_PDIV_SHIFT) |
(PLL45XX_SDIV_MASK << PLL45XX_SDIV_SHIFT));
con0 |= (rate->mdiv << PLL45XX_MDIV_SHIFT) |
(rate->pdiv << PLL45XX_PDIV_SHIFT) |
(rate->sdiv << PLL45XX_SDIV_SHIFT);
/* Set PLL AFC value. */
con1 = readl_relaxed(pll->con_reg + 0x4);
con1 &= ~(PLL45XX_AFC_MASK << PLL45XX_AFC_SHIFT);
con1 |= (rate->afc << PLL45XX_AFC_SHIFT);
/* Set PLL lock time. */
switch (pll->type) {
case pll_4502:
writel_relaxed(rate->pdiv * PLL4502_LOCK_FACTOR, pll->lock_reg);
break;
case pll_4508:
writel_relaxed(rate->pdiv * PLL4508_LOCK_FACTOR, pll->lock_reg);
break;
default:
break;
}
/* Set new configuration. */
writel_relaxed(con1, pll->con_reg + 0x4);
writel_relaxed(con0, pll->con_reg);
/* Wait for PLL lock */
return samsung_pll_lock_wait(pll, PLL45XX_LOCKED);
}
static const struct clk_ops samsung_pll45xx_clk_ops = {
.recalc_rate = samsung_pll45xx_recalc_rate,
.round_rate = samsung_pll_round_rate,
.set_rate = samsung_pll45xx_set_rate,
};
static const struct clk_ops samsung_pll45xx_clk_min_ops = {
.recalc_rate = samsung_pll45xx_recalc_rate,
};
/*
* PLL46xx Clock Type
*/
#define PLL46XX_LOCK_FACTOR 3000
#define PLL46XX_VSEL_MASK (1)
#define PLL46XX_MDIV_MASK (0x1FF)
#define PLL1460X_MDIV_MASK (0x3FF)
#define PLL46XX_PDIV_MASK (0x3F)
#define PLL46XX_SDIV_MASK (0x7)
#define PLL46XX_VSEL_SHIFT (27)
#define PLL46XX_MDIV_SHIFT (16)
#define PLL46XX_PDIV_SHIFT (8)
#define PLL46XX_SDIV_SHIFT (0)
#define PLL46XX_KDIV_MASK (0xFFFF)
#define PLL4650C_KDIV_MASK (0xFFF)
#define PLL46XX_KDIV_SHIFT (0)
#define PLL46XX_MFR_MASK (0x3F)
#define PLL46XX_MRR_MASK (0x1F)
#define PLL46XX_KDIV_SHIFT (0)
#define PLL46XX_MFR_SHIFT (16)
#define PLL46XX_MRR_SHIFT (24)
#define PLL46XX_ENABLE BIT(31)
#define PLL46XX_LOCKED BIT(29)
#define PLL46XX_VSEL BIT(27)
static unsigned long samsung_pll46xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1, shift;
u64 fvco = parent_rate;
pll_con0 = readl_relaxed(pll->con_reg);
pll_con1 = readl_relaxed(pll->con_reg + 4);
mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & ((pll->type == pll_1460x) ?
PLL1460X_MDIV_MASK : PLL46XX_MDIV_MASK);
pdiv = (pll_con0 >> PLL46XX_PDIV_SHIFT) & PLL46XX_PDIV_MASK;
sdiv = (pll_con0 >> PLL46XX_SDIV_SHIFT) & PLL46XX_SDIV_MASK;
kdiv = pll->type == pll_4650c ? pll_con1 & PLL4650C_KDIV_MASK :
pll_con1 & PLL46XX_KDIV_MASK;
shift = ((pll->type == pll_4600) || (pll->type == pll_1460x)) ? 16 : 10;
fvco *= (mdiv << shift) + kdiv;
do_div(fvco, (pdiv << sdiv));
fvco >>= shift;
return (unsigned long)fvco;
}
static bool samsung_pll46xx_mpk_change(u32 pll_con0, u32 pll_con1,
const struct samsung_pll_rate_table *rate)
{
u32 old_mdiv, old_pdiv, old_kdiv;
old_mdiv = (pll_con0 >> PLL46XX_MDIV_SHIFT) & PLL46XX_MDIV_MASK;
old_pdiv = (pll_con0 >> PLL46XX_PDIV_SHIFT) & PLL46XX_PDIV_MASK;
old_kdiv = (pll_con1 >> PLL46XX_KDIV_SHIFT) & PLL46XX_KDIV_MASK;
return (old_mdiv != rate->mdiv || old_pdiv != rate->pdiv
|| old_kdiv != rate->kdiv);
}
static int samsung_pll46xx_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
const struct samsung_pll_rate_table *rate;
u32 con0, con1, lock;
/* Get required rate settings from table */
rate = samsung_get_pll_settings(pll, drate);
if (!rate) {
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
drate, clk_hw_get_name(hw));
return -EINVAL;
}
con0 = readl_relaxed(pll->con_reg);
con1 = readl_relaxed(pll->con_reg + 0x4);
if (!(samsung_pll46xx_mpk_change(con0, con1, rate))) {
/* If only s change, change just s value only*/
con0 &= ~(PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT);
con0 |= rate->sdiv << PLL46XX_SDIV_SHIFT;
writel_relaxed(con0, pll->con_reg);
return 0;
}
/* Set PLL lock time. */
lock = rate->pdiv * PLL46XX_LOCK_FACTOR;
if (lock > 0xffff)
/* Maximum lock time bitfield is 16-bit. */
lock = 0xffff;
/* Set PLL PMS and VSEL values. */
if (pll->type == pll_1460x) {
con0 &= ~((PLL1460X_MDIV_MASK << PLL46XX_MDIV_SHIFT) |
(PLL46XX_PDIV_MASK << PLL46XX_PDIV_SHIFT) |
(PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT));
} else {
con0 &= ~((PLL46XX_MDIV_MASK << PLL46XX_MDIV_SHIFT) |
(PLL46XX_PDIV_MASK << PLL46XX_PDIV_SHIFT) |
(PLL46XX_SDIV_MASK << PLL46XX_SDIV_SHIFT) |
(PLL46XX_VSEL_MASK << PLL46XX_VSEL_SHIFT));
con0 |= rate->vsel << PLL46XX_VSEL_SHIFT;
}
con0 |= (rate->mdiv << PLL46XX_MDIV_SHIFT) |
(rate->pdiv << PLL46XX_PDIV_SHIFT) |
(rate->sdiv << PLL46XX_SDIV_SHIFT);
/* Set PLL K, MFR and MRR values. */
con1 = readl_relaxed(pll->con_reg + 0x4);
con1 &= ~((PLL46XX_KDIV_MASK << PLL46XX_KDIV_SHIFT) |
(PLL46XX_MFR_MASK << PLL46XX_MFR_SHIFT) |
(PLL46XX_MRR_MASK << PLL46XX_MRR_SHIFT));
con1 |= (rate->kdiv << PLL46XX_KDIV_SHIFT) |
(rate->mfr << PLL46XX_MFR_SHIFT) |
(rate->mrr << PLL46XX_MRR_SHIFT);
/* Write configuration to PLL */
writel_relaxed(lock, pll->lock_reg);
writel_relaxed(con0, pll->con_reg);
writel_relaxed(con1, pll->con_reg + 0x4);
/* Wait for PLL lock */
return samsung_pll_lock_wait(pll, PLL46XX_LOCKED);
}
static const struct clk_ops samsung_pll46xx_clk_ops = {
.recalc_rate = samsung_pll46xx_recalc_rate,
.round_rate = samsung_pll_round_rate,
.set_rate = samsung_pll46xx_set_rate,
};
static const struct clk_ops samsung_pll46xx_clk_min_ops = {
.recalc_rate = samsung_pll46xx_recalc_rate,
};
/*
* PLL6552 Clock Type
*/
#define PLL6552_MDIV_MASK 0x3ff
#define PLL6552_PDIV_MASK 0x3f
#define PLL6552_SDIV_MASK 0x7
#define PLL6552_MDIV_SHIFT 16
#define PLL6552_MDIV_SHIFT_2416 14
#define PLL6552_PDIV_SHIFT 8
#define PLL6552_PDIV_SHIFT_2416 5
#define PLL6552_SDIV_SHIFT 0
static unsigned long samsung_pll6552_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con;
u64 fvco = parent_rate;
pll_con = readl_relaxed(pll->con_reg);
if (pll->type == pll_6552_s3c2416) {
mdiv = (pll_con >> PLL6552_MDIV_SHIFT_2416) & PLL6552_MDIV_MASK;
pdiv = (pll_con >> PLL6552_PDIV_SHIFT_2416) & PLL6552_PDIV_MASK;
} else {
mdiv = (pll_con >> PLL6552_MDIV_SHIFT) & PLL6552_MDIV_MASK;
pdiv = (pll_con >> PLL6552_PDIV_SHIFT) & PLL6552_PDIV_MASK;
}
sdiv = (pll_con >> PLL6552_SDIV_SHIFT) & PLL6552_SDIV_MASK;
fvco *= mdiv;
do_div(fvco, (pdiv << sdiv));
return (unsigned long)fvco;
}
static const struct clk_ops samsung_pll6552_clk_ops = {
.recalc_rate = samsung_pll6552_recalc_rate,
};
/*
* PLL6553 Clock Type
*/
#define PLL6553_MDIV_MASK 0xff
#define PLL6553_PDIV_MASK 0x3f
#define PLL6553_SDIV_MASK 0x7
#define PLL6553_KDIV_MASK 0xffff
#define PLL6553_MDIV_SHIFT 16
#define PLL6553_PDIV_SHIFT 8
#define PLL6553_SDIV_SHIFT 0
#define PLL6553_KDIV_SHIFT 0
static unsigned long samsung_pll6553_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, kdiv, pll_con0, pll_con1;
u64 fvco = parent_rate;
pll_con0 = readl_relaxed(pll->con_reg);
pll_con1 = readl_relaxed(pll->con_reg + 0x4);
mdiv = (pll_con0 >> PLL6553_MDIV_SHIFT) & PLL6553_MDIV_MASK;
pdiv = (pll_con0 >> PLL6553_PDIV_SHIFT) & PLL6553_PDIV_MASK;
sdiv = (pll_con0 >> PLL6553_SDIV_SHIFT) & PLL6553_SDIV_MASK;
kdiv = (pll_con1 >> PLL6553_KDIV_SHIFT) & PLL6553_KDIV_MASK;
fvco *= (mdiv << 16) + kdiv;
do_div(fvco, (pdiv << sdiv));
fvco >>= 16;
return (unsigned long)fvco;
}
static const struct clk_ops samsung_pll6553_clk_ops = {
.recalc_rate = samsung_pll6553_recalc_rate,
};
/*
* PLL2550x Clock Type
*/
#define PLL2550X_R_MASK (0x1)
#define PLL2550X_P_MASK (0x3F)
#define PLL2550X_M_MASK (0x3FF)
#define PLL2550X_S_MASK (0x7)
#define PLL2550X_R_SHIFT (20)
#define PLL2550X_P_SHIFT (14)
#define PLL2550X_M_SHIFT (4)
#define PLL2550X_S_SHIFT (0)
static unsigned long samsung_pll2550x_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 r, p, m, s, pll_stat;
u64 fvco = parent_rate;
pll_stat = readl_relaxed(pll->con_reg);
r = (pll_stat >> PLL2550X_R_SHIFT) & PLL2550X_R_MASK;
if (!r)
return 0;
p = (pll_stat >> PLL2550X_P_SHIFT) & PLL2550X_P_MASK;
m = (pll_stat >> PLL2550X_M_SHIFT) & PLL2550X_M_MASK;
s = (pll_stat >> PLL2550X_S_SHIFT) & PLL2550X_S_MASK;
fvco *= m;
do_div(fvco, (p << s));
return (unsigned long)fvco;
}
static const struct clk_ops samsung_pll2550x_clk_ops = {
.recalc_rate = samsung_pll2550x_recalc_rate,
};
/*
* PLL2550xx Clock Type
*/
/* Maximum lock time can be 270 * PDIV cycles */
#define PLL2550XX_LOCK_FACTOR 270
#define PLL2550XX_M_MASK 0x3FF
#define PLL2550XX_P_MASK 0x3F
#define PLL2550XX_S_MASK 0x7
#define PLL2550XX_LOCK_STAT_MASK 0x1
#define PLL2550XX_M_SHIFT 9
#define PLL2550XX_P_SHIFT 3
#define PLL2550XX_S_SHIFT 0
#define PLL2550XX_LOCK_STAT_SHIFT 21
static unsigned long samsung_pll2550xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con;
u64 fvco = parent_rate;
pll_con = readl_relaxed(pll->con_reg);
mdiv = (pll_con >> PLL2550XX_M_SHIFT) & PLL2550XX_M_MASK;
pdiv = (pll_con >> PLL2550XX_P_SHIFT) & PLL2550XX_P_MASK;
sdiv = (pll_con >> PLL2550XX_S_SHIFT) & PLL2550XX_S_MASK;
fvco *= mdiv;
do_div(fvco, (pdiv << sdiv));
return (unsigned long)fvco;
}
static inline bool samsung_pll2550xx_mp_change(u32 mdiv, u32 pdiv, u32 pll_con)
{
u32 old_mdiv, old_pdiv;
old_mdiv = (pll_con >> PLL2550XX_M_SHIFT) & PLL2550XX_M_MASK;
old_pdiv = (pll_con >> PLL2550XX_P_SHIFT) & PLL2550XX_P_MASK;
return mdiv != old_mdiv || pdiv != old_pdiv;
}
static int samsung_pll2550xx_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
const struct samsung_pll_rate_table *rate;
u32 tmp;
/* Get required rate settings from table */
rate = samsung_get_pll_settings(pll, drate);
if (!rate) {
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
drate, clk_hw_get_name(hw));
return -EINVAL;
}
tmp = readl_relaxed(pll->con_reg);
if (!(samsung_pll2550xx_mp_change(rate->mdiv, rate->pdiv, tmp))) {
/* If only s change, change just s value only*/
tmp &= ~(PLL2550XX_S_MASK << PLL2550XX_S_SHIFT);
tmp |= rate->sdiv << PLL2550XX_S_SHIFT;
writel_relaxed(tmp, pll->con_reg);
return 0;
}
/* Set PLL lock time. */
writel_relaxed(rate->pdiv * PLL2550XX_LOCK_FACTOR, pll->lock_reg);
/* Change PLL PMS values */
tmp &= ~((PLL2550XX_M_MASK << PLL2550XX_M_SHIFT) |
(PLL2550XX_P_MASK << PLL2550XX_P_SHIFT) |
(PLL2550XX_S_MASK << PLL2550XX_S_SHIFT));
tmp |= (rate->mdiv << PLL2550XX_M_SHIFT) |
(rate->pdiv << PLL2550XX_P_SHIFT) |
(rate->sdiv << PLL2550XX_S_SHIFT);
writel_relaxed(tmp, pll->con_reg);
/* Wait for PLL lock */
return samsung_pll_lock_wait(pll,
PLL2550XX_LOCK_STAT_MASK << PLL2550XX_LOCK_STAT_SHIFT);
}
static const struct clk_ops samsung_pll2550xx_clk_ops = {
.recalc_rate = samsung_pll2550xx_recalc_rate,
.round_rate = samsung_pll_round_rate,
.set_rate = samsung_pll2550xx_set_rate,
};
static const struct clk_ops samsung_pll2550xx_clk_min_ops = {
.recalc_rate = samsung_pll2550xx_recalc_rate,
};
/*
* PLL2650x Clock Type
*/
/* Maximum lock time can be 3000 * PDIV cycles */
#define PLL2650X_LOCK_FACTOR 3000
#define PLL2650X_M_MASK 0x1ff
#define PLL2650X_P_MASK 0x3f
#define PLL2650X_S_MASK 0x7
#define PLL2650X_K_MASK 0xffff
#define PLL2650X_LOCK_STAT_MASK 0x1
#define PLL2650X_M_SHIFT 16
#define PLL2650X_P_SHIFT 8
#define PLL2650X_S_SHIFT 0
#define PLL2650X_K_SHIFT 0
#define PLL2650X_LOCK_STAT_SHIFT 29
#define PLL2650X_PLL_ENABLE_SHIFT 31
static unsigned long samsung_pll2650x_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u64 fout = parent_rate;
u32 mdiv, pdiv, sdiv, pll_con0, pll_con1;
s16 kdiv;
pll_con0 = readl_relaxed(pll->con_reg);
mdiv = (pll_con0 >> PLL2650X_M_SHIFT) & PLL2650X_M_MASK;
pdiv = (pll_con0 >> PLL2650X_P_SHIFT) & PLL2650X_P_MASK;
sdiv = (pll_con0 >> PLL2650X_S_SHIFT) & PLL2650X_S_MASK;
pll_con1 = readl_relaxed(pll->con_reg + 4);
kdiv = (s16)((pll_con1 >> PLL2650X_K_SHIFT) & PLL2650X_K_MASK);
fout *= (mdiv << 16) + kdiv;
do_div(fout, (pdiv << sdiv));
fout >>= 16;
return (unsigned long)fout;
}
static int samsung_pll2650x_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long prate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
const struct samsung_pll_rate_table *rate;
u32 con0, con1;
/* Get required rate settings from table */
rate = samsung_get_pll_settings(pll, drate);
if (!rate) {
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
drate, clk_hw_get_name(hw));
return -EINVAL;
}
con0 = readl_relaxed(pll->con_reg);
con1 = readl_relaxed(pll->con_reg + 4);
/* Set PLL lock time. */
writel_relaxed(rate->pdiv * PLL2650X_LOCK_FACTOR, pll->lock_reg);
/* Change PLL PMS values */
con0 &= ~((PLL2650X_M_MASK << PLL2650X_M_SHIFT) |
(PLL2650X_P_MASK << PLL2650X_P_SHIFT) |
(PLL2650X_S_MASK << PLL2650X_S_SHIFT));
con0 |= (rate->mdiv << PLL2650X_M_SHIFT) |
(rate->pdiv << PLL2650X_P_SHIFT) |
(rate->sdiv << PLL2650X_S_SHIFT);
con0 |= (1 << PLL2650X_PLL_ENABLE_SHIFT);
writel_relaxed(con0, pll->con_reg);
con1 &= ~(PLL2650X_K_MASK << PLL2650X_K_SHIFT);
con1 |= ((rate->kdiv & PLL2650X_K_MASK) << PLL2650X_K_SHIFT);
writel_relaxed(con1, pll->con_reg + 4);
/* Wait for PLL lock */
return samsung_pll_lock_wait(pll,
PLL2650X_LOCK_STAT_MASK << PLL2650X_LOCK_STAT_SHIFT);
}
static const struct clk_ops samsung_pll2650x_clk_ops = {
.recalc_rate = samsung_pll2650x_recalc_rate,
.round_rate = samsung_pll_round_rate,
.set_rate = samsung_pll2650x_set_rate,
};
static const struct clk_ops samsung_pll2650x_clk_min_ops = {
.recalc_rate = samsung_pll2650x_recalc_rate,
};
/*
* PLL2650XX Clock Type
*/
/* Maximum lock time can be 3000 * PDIV cycles */
#define PLL2650XX_LOCK_FACTOR 3000
#define PLL2650XX_MDIV_SHIFT 9
#define PLL2650XX_PDIV_SHIFT 3
#define PLL2650XX_SDIV_SHIFT 0
#define PLL2650XX_KDIV_SHIFT 0
#define PLL2650XX_MDIV_MASK 0x1ff
#define PLL2650XX_PDIV_MASK 0x3f
#define PLL2650XX_SDIV_MASK 0x7
#define PLL2650XX_KDIV_MASK 0xffff
#define PLL2650XX_PLL_ENABLE_SHIFT 23
#define PLL2650XX_PLL_LOCKTIME_SHIFT 21
#define PLL2650XX_PLL_FOUTMASK_SHIFT 31
static unsigned long samsung_pll2650xx_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 mdiv, pdiv, sdiv, pll_con0, pll_con2;
s16 kdiv;
u64 fvco = parent_rate;
pll_con0 = readl_relaxed(pll->con_reg);
pll_con2 = readl_relaxed(pll->con_reg + 8);
mdiv = (pll_con0 >> PLL2650XX_MDIV_SHIFT) & PLL2650XX_MDIV_MASK;
pdiv = (pll_con0 >> PLL2650XX_PDIV_SHIFT) & PLL2650XX_PDIV_MASK;
sdiv = (pll_con0 >> PLL2650XX_SDIV_SHIFT) & PLL2650XX_SDIV_MASK;
kdiv = (s16)(pll_con2 & PLL2650XX_KDIV_MASK);
fvco *= (mdiv << 16) + kdiv;
do_div(fvco, (pdiv << sdiv));
fvco >>= 16;
return (unsigned long)fvco;
}
static int samsung_pll2650xx_set_rate(struct clk_hw *hw, unsigned long drate,
unsigned long parent_rate)
{
struct samsung_clk_pll *pll = to_clk_pll(hw);
u32 pll_con0, pll_con2;
const struct samsung_pll_rate_table *rate;
rate = samsung_get_pll_settings(pll, drate);
if (!rate) {
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
drate, clk_hw_get_name(hw));
return -EINVAL;
}
pll_con0 = readl_relaxed(pll->con_reg);
pll_con2 = readl_relaxed(pll->con_reg + 8);
/* Change PLL PMS values */
pll_con0 &= ~(PLL2650XX_MDIV_MASK << PLL2650XX_MDIV_SHIFT |
PLL2650XX_PDIV_MASK << PLL2650XX_PDIV_SHIFT |
PLL2650XX_SDIV_MASK << PLL2650XX_SDIV_SHIFT);
pll_con0 |= rate->mdiv << PLL2650XX_MDIV_SHIFT;
pll_con0 |= rate->pdiv << PLL2650XX_PDIV_SHIFT;
pll_con0 |= rate->sdiv << PLL2650XX_SDIV_SHIFT;
pll_con0 |= 1 << PLL2650XX_PLL_ENABLE_SHIFT;
pll_con0 |= 1 << PLL2650XX_PLL_FOUTMASK_SHIFT;
pll_con2 &= ~(PLL2650XX_KDIV_MASK << PLL2650XX_KDIV_SHIFT);
pll_con2 |= ((~(rate->kdiv) + 1) & PLL2650XX_KDIV_MASK)
<< PLL2650XX_KDIV_SHIFT;
/* Set PLL lock time. */
writel_relaxed(PLL2650XX_LOCK_FACTOR * rate->pdiv, pll->lock_reg);
writel_relaxed(pll_con0, pll->con_reg);
writel_relaxed(pll_con2, pll->con_reg + 8);
return samsung_pll_lock_wait(pll, 0x1 << PLL2650XX_PLL_LOCKTIME_SHIFT);
}
static const struct clk_ops samsung_pll2650xx_clk_ops = {
.recalc_rate = samsung_pll2650xx_recalc_rate,
.set_rate = samsung_pll2650xx_set_rate,
.round_rate = samsung_pll_round_rate,
};
static const struct clk_ops samsung_pll2650xx_clk_min_ops = {
.recalc_rate = samsung_pll2650xx_recalc_rate,
};
static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
const struct samsung_pll_clock *pll_clk)
{
struct samsung_clk_pll *pll;
struct clk_init_data init;
int ret, len;
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
if (!pll) {
pr_err("%s: could not allocate pll clk %s\n",
__func__, pll_clk->name);
return;
}
init.name = pll_clk->name;
init.flags = pll_clk->flags;
init.parent_names = &pll_clk->parent_name;
init.num_parents = 1;
if (pll_clk->rate_table) {
/* find count of rates in rate_table */
for (len = 0; pll_clk->rate_table[len].rate != 0; )
len++;
pll->rate_count = len;
pll->rate_table = kmemdup(pll_clk->rate_table,
pll->rate_count *
sizeof(struct samsung_pll_rate_table),
GFP_KERNEL);
WARN(!pll->rate_table,
"%s: could not allocate rate table for %s\n",
__func__, pll_clk->name);
}
switch (pll_clk->type) {
case pll_2126:
init.ops = &samsung_pll2126_clk_ops;
break;
case pll_3000:
init.ops = &samsung_pll3000_clk_ops;
break;
/* clk_ops for 35xx and 2550 are similar */
case pll_35xx:
case pll_2550:
case pll_1450x:
case pll_1451x:
case pll_1452x:
case pll_142xx:
pll->enable_offs = PLL35XX_ENABLE_SHIFT;
pll->lock_offs = PLL35XX_LOCK_STAT_SHIFT;
if (!pll->rate_table)
init.ops = &samsung_pll35xx_clk_min_ops;
else
init.ops = &samsung_pll35xx_clk_ops;
break;
case pll_1417x:
case pll_0818x:
case pll_0822x:
pll->enable_offs = PLL0822X_ENABLE_SHIFT;
pll->lock_offs = PLL0822X_LOCK_STAT_SHIFT;
if (!pll->rate_table)
init.ops = &samsung_pll0822x_clk_min_ops;
else
init.ops = &samsung_pll0822x_clk_ops;
break;
case pll_4500:
init.ops = &samsung_pll45xx_clk_min_ops;
break;
case pll_4502:
case pll_4508:
if (!pll->rate_table)
init.ops = &samsung_pll45xx_clk_min_ops;
else
init.ops = &samsung_pll45xx_clk_ops;
break;
/* clk_ops for 36xx and 2650 are similar */
case pll_36xx:
case pll_2650:
pll->enable_offs = PLL36XX_ENABLE_SHIFT;
pll->lock_offs = PLL36XX_LOCK_STAT_SHIFT;
if (!pll->rate_table)
init.ops = &samsung_pll36xx_clk_min_ops;
else
init.ops = &samsung_pll36xx_clk_ops;
break;
case pll_0831x:
pll->enable_offs = PLL0831X_ENABLE_SHIFT;
pll->lock_offs = PLL0831X_LOCK_STAT_SHIFT;
if (!pll->rate_table)
init.ops = &samsung_pll0831x_clk_min_ops;
else
init.ops = &samsung_pll0831x_clk_ops;
break;
case pll_6552:
case pll_6552_s3c2416:
init.ops = &samsung_pll6552_clk_ops;
break;
case pll_6553:
init.ops = &samsung_pll6553_clk_ops;
break;
case pll_4600:
case pll_4650:
case pll_4650c:
case pll_1460x:
if (!pll->rate_table)
init.ops = &samsung_pll46xx_clk_min_ops;
else
init.ops = &samsung_pll46xx_clk_ops;
break;
case pll_2550x:
init.ops = &samsung_pll2550x_clk_ops;
break;
case pll_2550xx:
if (!pll->rate_table)
init.ops = &samsung_pll2550xx_clk_min_ops;
else
init.ops = &samsung_pll2550xx_clk_ops;
break;
case pll_2650x:
if (!pll->rate_table)
init.ops = &samsung_pll2650x_clk_min_ops;
else
init.ops = &samsung_pll2650x_clk_ops;
break;
case pll_2650xx:
if (!pll->rate_table)
init.ops = &samsung_pll2650xx_clk_min_ops;
else
init.ops = &samsung_pll2650xx_clk_ops;
break;
default:
pr_warn("%s: Unknown pll type for pll clk %s\n",
__func__, pll_clk->name);
}
pll->hw.init = &init;
pll->type = pll_clk->type;
pll->lock_reg = ctx->reg_base + pll_clk->lock_offset;
pll->con_reg = ctx->reg_base + pll_clk->con_offset;
ret = clk_hw_register(ctx->dev, &pll->hw);
if (ret) {
pr_err("%s: failed to register pll clock %s : %d\n",
__func__, pll_clk->name, ret);
kfree(pll->rate_table);
kfree(pll);
return;
}
samsung_clk_add_lookup(ctx, &pll->hw, pll_clk->id);
}
void __init samsung_clk_register_pll(struct samsung_clk_provider *ctx,
const struct samsung_pll_clock *pll_list,
unsigned int nr_pll)
{
int cnt;
for (cnt = 0; cnt < nr_pll; cnt++)
_samsung_clk_register_pll(ctx, &pll_list[cnt]);
}
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