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-rw-r--r--drivers/clk/clk_meson.c533
1 files changed, 528 insertions, 5 deletions
diff --git a/drivers/clk/clk_meson.c b/drivers/clk/clk_meson.c
index 3850128e5c..236d7342b7 100644
--- a/drivers/clk/clk_meson.c
+++ b/drivers/clk/clk_meson.c
@@ -14,12 +14,69 @@
#include <dt-bindings/clock/gxbb-clkc.h>
#include "clk_meson.h"
+/* This driver support only basic clock tree operations :
+ * - Can calculate clock frequency on a limited tree
+ * - Can Read muxes and basic dividers (0-based only)
+ * - Can enable/disable gates with limited propagation
+ * - Can reparent without propagation, only on muxes
+ * - Can set rates without reparenting
+ * This driver is adapted to what is actually supported by U-Boot
+ */
+
+/* Only the clocks ids we don't want to expose, such as the internal muxes
+ * and dividers of composite clocks, will remain defined here.
+ */
+#define CLKID_MPEG_SEL 10
+#define CLKID_MPEG_DIV 11
+#define CLKID_SAR_ADC_DIV 99
+#define CLKID_MALI_0_DIV 101
+#define CLKID_MALI_1_DIV 104
+#define CLKID_CTS_AMCLK_SEL 108
+#define CLKID_CTS_AMCLK_DIV 109
+#define CLKID_CTS_MCLK_I958_SEL 111
+#define CLKID_CTS_MCLK_I958_DIV 112
+#define CLKID_32K_CLK_SEL 115
+#define CLKID_32K_CLK_DIV 116
+#define CLKID_SD_EMMC_A_CLK0_SEL 117
+#define CLKID_SD_EMMC_A_CLK0_DIV 118
+#define CLKID_SD_EMMC_B_CLK0_SEL 120
+#define CLKID_SD_EMMC_B_CLK0_DIV 121
+#define CLKID_SD_EMMC_C_CLK0_SEL 123
+#define CLKID_SD_EMMC_C_CLK0_DIV 124
+#define CLKID_VPU_0_DIV 127
+#define CLKID_VPU_1_DIV 130
+#define CLKID_VAPB_0_DIV 134
+#define CLKID_VAPB_1_DIV 137
+#define CLKID_HDMI_PLL_PRE_MULT 141
+#define CLKID_MPLL0_DIV 142
+#define CLKID_MPLL1_DIV 143
+#define CLKID_MPLL2_DIV 144
+#define CLKID_MPLL_PREDIV 145
+#define CLKID_FCLK_DIV2_DIV 146
+#define CLKID_FCLK_DIV3_DIV 147
+#define CLKID_FCLK_DIV4_DIV 148
+#define CLKID_FCLK_DIV5_DIV 149
+#define CLKID_FCLK_DIV7_DIV 150
+#define CLKID_VDEC_1_SEL 151
+#define CLKID_VDEC_1_DIV 152
+#define CLKID_VDEC_HEVC_SEL 154
+#define CLKID_VDEC_HEVC_DIV 155
+
#define XTAL_RATE 24000000
struct meson_clk {
void __iomem *addr;
};
+static ulong meson_div_get_rate(struct clk *clk, unsigned long id);
+static ulong meson_div_set_rate(struct clk *clk, unsigned long id, ulong rate,
+ ulong current_rate);
+static ulong meson_mux_set_parent(struct clk *clk, unsigned long id,
+ unsigned long parent_id);
+static ulong meson_mux_get_rate(struct clk *clk, unsigned long id);
+static ulong meson_clk_set_rate_by_id(struct clk *clk, unsigned long id,
+ ulong rate, ulong current_rate);
+static ulong meson_mux_get_parent(struct clk *clk, unsigned long id);
static ulong meson_clk_get_rate_by_id(struct clk *clk, unsigned long id);
struct meson_gate gates[] = {
@@ -126,34 +183,387 @@ struct meson_gate gates[] = {
MESON_GATE(CLKID_SD_EMMC_A_CLK0, HHI_SD_EMMC_CLK_CNTL, 7),
MESON_GATE(CLKID_SD_EMMC_B_CLK0, HHI_SD_EMMC_CLK_CNTL, 23),
MESON_GATE(CLKID_SD_EMMC_C_CLK0, HHI_NAND_CLK_CNTL, 7),
+ MESON_GATE(CLKID_VPU_0, HHI_VPU_CLK_CNTL, 8),
+ MESON_GATE(CLKID_VPU_1, HHI_VPU_CLK_CNTL, 24),
+ MESON_GATE(CLKID_VAPB_0, HHI_VAPBCLK_CNTL, 8),
+ MESON_GATE(CLKID_VAPB_1, HHI_VAPBCLK_CNTL, 24),
+ MESON_GATE(CLKID_VAPB, HHI_VAPBCLK_CNTL, 30),
};
-static int meson_set_gate(struct clk *clk, bool on)
+static int meson_set_gate_by_id(struct clk *clk, unsigned long id, bool on)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
struct meson_gate *gate;
- if (clk->id >= ARRAY_SIZE(gates))
+ debug("%s: %sabling %ld\n", __func__, on ? "en" : "dis", id);
+
+ /* Propagate through muxes */
+ switch (id) {
+ case CLKID_VPU:
+ return meson_set_gate_by_id(clk,
+ meson_mux_get_parent(clk, CLKID_VPU), on);
+ case CLKID_VAPB_SEL:
+ return meson_set_gate_by_id(clk,
+ meson_mux_get_parent(clk, CLKID_VAPB_SEL), on);
+ }
+
+ if (id >= ARRAY_SIZE(gates))
return -ENOENT;
- gate = &gates[clk->id];
+ gate = &gates[id];
if (gate->reg == 0)
return 0;
+ debug("%s: really %sabling %ld\n", __func__, on ? "en" : "dis", id);
+
clrsetbits_le32(priv->addr + gate->reg,
BIT(gate->bit), on ? BIT(gate->bit) : 0);
+
+ /* Propagate to next gate(s) */
+ switch (id) {
+ case CLKID_VAPB:
+ return meson_set_gate_by_id(clk, CLKID_VAPB_SEL, on);
+ }
+
return 0;
}
static int meson_clk_enable(struct clk *clk)
{
- return meson_set_gate(clk, true);
+ return meson_set_gate_by_id(clk, clk->id, true);
}
static int meson_clk_disable(struct clk *clk)
{
- return meson_set_gate(clk, false);
+ return meson_set_gate_by_id(clk, clk->id, false);
+}
+
+static struct parm meson_vpu_0_div_parm = {
+ HHI_VPU_CLK_CNTL, 0, 7,
+};
+
+int meson_vpu_0_div_parent = CLKID_VPU_0_SEL;
+
+static struct parm meson_vpu_1_div_parm = {
+ HHI_VPU_CLK_CNTL, 16, 7,
+};
+
+int meson_vpu_1_div_parent = CLKID_VPU_1_SEL;
+
+static struct parm meson_vapb_0_div_parm = {
+ HHI_VAPBCLK_CNTL, 0, 7,
+};
+
+int meson_vapb_0_div_parent = CLKID_VAPB_0_SEL;
+
+static struct parm meson_vapb_1_div_parm = {
+ HHI_VAPBCLK_CNTL, 16, 7,
+};
+
+int meson_vapb_1_div_parent = CLKID_VAPB_1_SEL;
+
+static ulong meson_div_get_rate(struct clk *clk, unsigned long id)
+{
+ struct meson_clk *priv = dev_get_priv(clk->dev);
+ unsigned int rate, parent_rate;
+ struct parm *parm;
+ int parent;
+ u32 reg;
+
+ switch (id) {
+ case CLKID_VPU_0_DIV:
+ parm = &meson_vpu_0_div_parm;
+ parent = meson_vpu_0_div_parent;
+ break;
+ case CLKID_VPU_1_DIV:
+ parm = &meson_vpu_1_div_parm;
+ parent = meson_vpu_1_div_parent;
+ break;
+ case CLKID_VAPB_0_DIV:
+ parm = &meson_vapb_0_div_parm;
+ parent = meson_vapb_0_div_parent;
+ break;
+ case CLKID_VAPB_1_DIV:
+ parm = &meson_vapb_1_div_parm;
+ parent = meson_vapb_1_div_parent;
+ break;
+ default:
+ return -ENOENT;
+ }
+
+ reg = readl(priv->addr + parm->reg_off);
+ reg = PARM_GET(parm->width, parm->shift, reg);
+
+ debug("%s: div of %ld is %d\n", __func__, id, reg + 1);
+
+ parent_rate = meson_clk_get_rate_by_id(clk, parent);
+ if (IS_ERR_VALUE(parent_rate))
+ return parent_rate;
+
+ debug("%s: parent rate of %ld is %d\n", __func__, id, parent_rate);
+
+ rate = parent_rate / (reg + 1);
+
+ debug("%s: rate of %ld is %d\n", __func__, id, rate);
+
+ return rate;
+}
+
+static ulong meson_div_set_rate(struct clk *clk, unsigned long id, ulong rate,
+ ulong current_rate)
+{
+ struct meson_clk *priv = dev_get_priv(clk->dev);
+ unsigned int new_div = -EINVAL;
+ unsigned long parent_rate;
+ struct parm *parm;
+ int parent;
+ u32 reg;
+ int ret;
+
+ if (current_rate == rate)
+ return 0;
+
+ debug("%s: setting rate of %ld from %ld to %ld\n",
+ __func__, id, current_rate, rate);
+
+ switch (id) {
+ case CLKID_VPU_0_DIV:
+ parm = &meson_vpu_0_div_parm;
+ parent = meson_vpu_0_div_parent;
+ break;
+ case CLKID_VPU_1_DIV:
+ parm = &meson_vpu_1_div_parm;
+ parent = meson_vpu_1_div_parent;
+ break;
+ case CLKID_VAPB_0_DIV:
+ parm = &meson_vapb_0_div_parm;
+ parent = meson_vapb_0_div_parent;
+ break;
+ case CLKID_VAPB_1_DIV:
+ parm = &meson_vapb_1_div_parm;
+ parent = meson_vapb_1_div_parent;
+ break;
+ default:
+ return -ENOENT;
+ }
+
+ parent_rate = meson_clk_get_rate_by_id(clk, parent);
+ if (IS_ERR_VALUE(parent_rate))
+ return parent_rate;
+
+ debug("%s: parent rate of %ld is %ld\n", __func__, id, parent_rate);
+
+ /* If can't divide, set parent instead */
+ if (!parent_rate || rate > parent_rate)
+ return meson_clk_set_rate_by_id(clk, parent, rate,
+ current_rate);
+
+ new_div = DIV_ROUND_CLOSEST(parent_rate, rate);
+
+ debug("%s: new div of %ld is %d\n", __func__, id, new_div);
+
+ /* If overflow, try to set parent rate and retry */
+ if (!new_div || new_div > (1 << parm->width)) {
+ ret = meson_clk_set_rate_by_id(clk, parent, rate, current_rate);
+ if (IS_ERR_VALUE(ret))
+ return ret;
+
+ parent_rate = meson_clk_get_rate_by_id(clk, parent);
+ if (IS_ERR_VALUE(parent_rate))
+ return parent_rate;
+
+ new_div = DIV_ROUND_CLOSEST(parent_rate, rate);
+
+ debug("%s: new new div of %ld is %d\n", __func__, id, new_div);
+
+ if (!new_div || new_div > (1 << parm->width))
+ return -EINVAL;
+ }
+
+ debug("%s: setting div of %ld to %d\n", __func__, id, new_div);
+
+ reg = readl(priv->addr + parm->reg_off);
+ writel(PARM_SET(parm->width, parm->shift, reg, new_div - 1),
+ priv->addr + parm->reg_off);
+
+ debug("%s: new rate of %ld is %ld\n",
+ __func__, id, meson_div_get_rate(clk, id));
+
+ return 0;
+}
+
+static struct parm meson_vpu_mux_parm = {
+ HHI_VPU_CLK_CNTL, 31, 1,
+};
+
+int meson_vpu_mux_parents[] = {
+ CLKID_VPU_0,
+ CLKID_VPU_1,
+};
+
+static struct parm meson_vpu_0_mux_parm = {
+ HHI_VPU_CLK_CNTL, 9, 2,
+};
+
+static struct parm meson_vpu_1_mux_parm = {
+ HHI_VPU_CLK_CNTL, 25, 2,
+};
+
+static int meson_vpu_0_1_mux_parents[] = {
+ CLKID_FCLK_DIV4,
+ CLKID_FCLK_DIV3,
+ CLKID_FCLK_DIV5,
+ CLKID_FCLK_DIV7,
+};
+
+static struct parm meson_vapb_sel_mux_parm = {
+ HHI_VAPBCLK_CNTL, 31, 1,
+};
+
+int meson_vapb_sel_mux_parents[] = {
+ CLKID_VAPB_0,
+ CLKID_VAPB_1,
+};
+
+static struct parm meson_vapb_0_mux_parm = {
+ HHI_VAPBCLK_CNTL, 9, 2,
+};
+
+static struct parm meson_vapb_1_mux_parm = {
+ HHI_VAPBCLK_CNTL, 25, 2,
+};
+
+static int meson_vapb_0_1_mux_parents[] = {
+ CLKID_FCLK_DIV4,
+ CLKID_FCLK_DIV3,
+ CLKID_FCLK_DIV5,
+ CLKID_FCLK_DIV7,
+};
+
+static ulong meson_mux_get_parent(struct clk *clk, unsigned long id)
+{
+ struct meson_clk *priv = dev_get_priv(clk->dev);
+ struct parm *parm;
+ int *parents;
+ u32 reg;
+
+ switch (id) {
+ case CLKID_VPU:
+ parm = &meson_vpu_mux_parm;
+ parents = meson_vpu_mux_parents;
+ break;
+ case CLKID_VPU_0_SEL:
+ parm = &meson_vpu_0_mux_parm;
+ parents = meson_vpu_0_1_mux_parents;
+ break;
+ case CLKID_VPU_1_SEL:
+ parm = &meson_vpu_1_mux_parm;
+ parents = meson_vpu_0_1_mux_parents;
+ break;
+ case CLKID_VAPB_SEL:
+ parm = &meson_vapb_sel_mux_parm;
+ parents = meson_vapb_sel_mux_parents;
+ break;
+ case CLKID_VAPB_0_SEL:
+ parm = &meson_vapb_0_mux_parm;
+ parents = meson_vapb_0_1_mux_parents;
+ break;
+ case CLKID_VAPB_1_SEL:
+ parm = &meson_vapb_1_mux_parm;
+ parents = meson_vapb_0_1_mux_parents;
+ break;
+ default:
+ return -ENOENT;
+ }
+
+ reg = readl(priv->addr + parm->reg_off);
+ reg = PARM_GET(parm->width, parm->shift, reg);
+
+ debug("%s: parent of %ld is %d (%d)\n",
+ __func__, id, parents[reg], reg);
+
+ return parents[reg];
+}
+
+static ulong meson_mux_set_parent(struct clk *clk, unsigned long id,
+ unsigned long parent_id)
+{
+ unsigned long cur_parent = meson_mux_get_parent(clk, id);
+ struct meson_clk *priv = dev_get_priv(clk->dev);
+ unsigned int new_index = -EINVAL;
+ struct parm *parm;
+ int *parents;
+ u32 reg;
+ int i;
+
+ if (IS_ERR_VALUE(cur_parent))
+ return cur_parent;
+
+ debug("%s: setting parent of %ld from %ld to %ld\n",
+ __func__, id, cur_parent, parent_id);
+
+ if (cur_parent == parent_id)
+ return 0;
+
+ switch (id) {
+ case CLKID_VPU:
+ parm = &meson_vpu_mux_parm;
+ parents = meson_vpu_mux_parents;
+ break;
+ case CLKID_VPU_0_SEL:
+ parm = &meson_vpu_0_mux_parm;
+ parents = meson_vpu_0_1_mux_parents;
+ break;
+ case CLKID_VPU_1_SEL:
+ parm = &meson_vpu_1_mux_parm;
+ parents = meson_vpu_0_1_mux_parents;
+ break;
+ case CLKID_VAPB_SEL:
+ parm = &meson_vapb_sel_mux_parm;
+ parents = meson_vapb_sel_mux_parents;
+ break;
+ case CLKID_VAPB_0_SEL:
+ parm = &meson_vapb_0_mux_parm;
+ parents = meson_vapb_0_1_mux_parents;
+ break;
+ case CLKID_VAPB_1_SEL:
+ parm = &meson_vapb_1_mux_parm;
+ parents = meson_vapb_0_1_mux_parents;
+ break;
+ default:
+ /* Not a mux */
+ return -ENOENT;
+ }
+
+ for (i = 0 ; i < (1 << parm->width) ; ++i) {
+ if (parents[i] == parent_id)
+ new_index = i;
+ }
+
+ if (IS_ERR_VALUE(new_index))
+ return new_index;
+
+ debug("%s: new index of %ld is %d\n", __func__, id, new_index);
+
+ reg = readl(priv->addr + parm->reg_off);
+ writel(PARM_SET(parm->width, parm->shift, reg, new_index),
+ priv->addr + parm->reg_off);
+
+ debug("%s: new parent of %ld is %ld\n",
+ __func__, id, meson_mux_get_parent(clk, id));
+
+ return 0;
+}
+
+static ulong meson_mux_get_rate(struct clk *clk, unsigned long id)
+{
+ int parent = meson_mux_get_parent(clk, id);
+
+ if (IS_ERR_VALUE(parent))
+ return parent;
+
+ return meson_clk_get_rate_by_id(clk, parent);
}
static unsigned long meson_clk81_get_rate(struct clk *clk)
@@ -342,6 +752,35 @@ static ulong meson_clk_get_rate_by_id(struct clk *clk, unsigned long id)
case CLKID_CLK81:
rate = meson_clk81_get_rate(clk);
break;
+ case CLKID_VPU_0:
+ rate = meson_div_get_rate(clk, CLKID_VPU_0_DIV);
+ break;
+ case CLKID_VPU_1:
+ rate = meson_div_get_rate(clk, CLKID_VPU_1_DIV);
+ break;
+ case CLKID_VAPB:
+ rate = meson_mux_get_rate(clk, CLKID_VAPB_SEL);
+ break;
+ case CLKID_VAPB_0:
+ rate = meson_div_get_rate(clk, CLKID_VAPB_0_DIV);
+ break;
+ case CLKID_VAPB_1:
+ rate = meson_div_get_rate(clk, CLKID_VAPB_1_DIV);
+ break;
+ case CLKID_VPU_0_DIV:
+ case CLKID_VPU_1_DIV:
+ case CLKID_VAPB_0_DIV:
+ case CLKID_VAPB_1_DIV:
+ rate = meson_div_get_rate(clk, id);
+ break;
+ case CLKID_VPU:
+ case CLKID_VPU_0_SEL:
+ case CLKID_VPU_1_SEL:
+ case CLKID_VAPB_SEL:
+ case CLKID_VAPB_0_SEL:
+ case CLKID_VAPB_1_SEL:
+ rate = meson_mux_get_rate(clk, id);
+ break;
default:
if (gates[id].reg != 0) {
/* a clock gate */
@@ -360,6 +799,88 @@ static ulong meson_clk_get_rate(struct clk *clk)
return meson_clk_get_rate_by_id(clk, clk->id);
}
+static int meson_clk_set_parent(struct clk *clk, struct clk *parent)
+{
+ return meson_mux_set_parent(clk, clk->id, parent->id);
+}
+
+static ulong meson_clk_set_rate_by_id(struct clk *clk, unsigned long id,
+ ulong rate, ulong current_rate)
+{
+ if (current_rate == rate)
+ return 0;
+
+ switch (id) {
+ /* Fixed clocks */
+ case CLKID_FIXED_PLL:
+ case CLKID_SYS_PLL:
+ case CLKID_FCLK_DIV2:
+ case CLKID_FCLK_DIV3:
+ case CLKID_FCLK_DIV4:
+ case CLKID_FCLK_DIV5:
+ case CLKID_FCLK_DIV7:
+ case CLKID_MPLL0:
+ case CLKID_MPLL1:
+ case CLKID_MPLL2:
+ case CLKID_CLK81:
+ if (current_rate != rate)
+ return -EINVAL;
+
+ return 0;
+ case CLKID_VPU:
+ return meson_clk_set_rate_by_id(clk,
+ meson_mux_get_parent(clk, CLKID_VPU), rate,
+ current_rate);
+ case CLKID_VAPB:
+ case CLKID_VAPB_SEL:
+ return meson_clk_set_rate_by_id(clk,
+ meson_mux_get_parent(clk, CLKID_VAPB_SEL),
+ rate, current_rate);
+ case CLKID_VPU_0:
+ return meson_div_set_rate(clk, CLKID_VPU_0_DIV, rate,
+ current_rate);
+ case CLKID_VPU_1:
+ return meson_div_set_rate(clk, CLKID_VPU_1_DIV, rate,
+ current_rate);
+ case CLKID_VAPB_0:
+ return meson_div_set_rate(clk, CLKID_VAPB_0_DIV, rate,
+ current_rate);
+ case CLKID_VAPB_1:
+ return meson_div_set_rate(clk, CLKID_VAPB_1_DIV, rate,
+ current_rate);
+ case CLKID_VPU_0_DIV:
+ case CLKID_VPU_1_DIV:
+ case CLKID_VAPB_0_DIV:
+ case CLKID_VAPB_1_DIV:
+ return meson_div_set_rate(clk, id, rate, current_rate);
+ default:
+ return -ENOENT;
+ }
+
+ return -EINVAL;
+}
+
+static ulong meson_clk_set_rate(struct clk *clk, ulong rate)
+{
+ ulong current_rate = meson_clk_get_rate_by_id(clk, clk->id);
+ int ret;
+
+ if (IS_ERR_VALUE(current_rate))
+ return current_rate;
+
+ debug("%s: setting rate of %ld from %ld to %ld\n",
+ __func__, clk->id, current_rate, rate);
+
+ ret = meson_clk_set_rate_by_id(clk, clk->id, rate, current_rate);
+ if (IS_ERR_VALUE(ret))
+ return ret;
+
+ printf("clock %lu has new rate %lu\n", clk->id,
+ meson_clk_get_rate_by_id(clk, clk->id));
+
+ return 0;
+}
+
static int meson_clk_probe(struct udevice *dev)
{
struct meson_clk *priv = dev_get_priv(dev);
@@ -375,6 +896,8 @@ static struct clk_ops meson_clk_ops = {
.disable = meson_clk_disable,
.enable = meson_clk_enable,
.get_rate = meson_clk_get_rate,
+ .set_parent = meson_clk_set_parent,
+ .set_rate = meson_clk_set_rate,
};
static const struct udevice_id meson_clk_ids[] = {
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 00:47:46 +0000