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-rw-r--r--drivers/clk/samsung/clk-pll.c1421
1 files changed, 1421 insertions, 0 deletions
diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
new file mode 100644
index 0000000000..74934c6182
--- /dev/null
+++ b/drivers/clk/samsung/clk-pll.c
@@ -0,0 +1,1421 @@
+// 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]);
+}