u-boot/drivers/clk/meson/g12a.c
Jerome Brunet b3d69aa596 clk: meson: reset mmc clock on probe
On some SoCs, depending on the boot device, the MMC clock block may be
left in a weird state by the ROM code, in which no decent clock may be
provided. Reset the related register to make sure a sane MMC clock is
ready for the controller.

Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2020-04-06 09:56:35 +02:00

1016 lines
25 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2018 - Beniamino Galvani <b.galvani@gmail.com>
* (C) Copyright 2018 - BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
*/
#include <common.h>
#include <asm/arch/clock-g12a.h>
#include <asm/io.h>
#include <clk-uclass.h>
#include <dm.h>
#include <regmap.h>
#include <syscon.h>
#include <div64.h>
#include <dt-bindings/clock/g12a-clkc.h>
#include <linux/err.h>
#include <linux/kernel.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 8
#define CLKID_MPEG_DIV 9
#define CLKID_SD_EMMC_A_CLK0_SEL 63
#define CLKID_SD_EMMC_A_CLK0_DIV 64
#define CLKID_SD_EMMC_B_CLK0_SEL 65
#define CLKID_SD_EMMC_B_CLK0_DIV 66
#define CLKID_SD_EMMC_C_CLK0_SEL 67
#define CLKID_SD_EMMC_C_CLK0_DIV 68
#define CLKID_MPLL0_DIV 69
#define CLKID_MPLL1_DIV 70
#define CLKID_MPLL2_DIV 71
#define CLKID_MPLL3_DIV 72
#define CLKID_MPLL_PREDIV 73
#define CLKID_FCLK_DIV2_DIV 75
#define CLKID_FCLK_DIV3_DIV 76
#define CLKID_FCLK_DIV4_DIV 77
#define CLKID_FCLK_DIV5_DIV 78
#define CLKID_FCLK_DIV7_DIV 79
#define CLKID_FCLK_DIV2P5_DIV 100
#define CLKID_FIXED_PLL_DCO 101
#define CLKID_SYS_PLL_DCO 102
#define CLKID_GP0_PLL_DCO 103
#define CLKID_HIFI_PLL_DCO 104
#define CLKID_VPU_0_DIV 111
#define CLKID_VPU_1_DIV 114
#define CLKID_VAPB_0_DIV 118
#define CLKID_VAPB_1_DIV 121
#define CLKID_HDMI_PLL_DCO 125
#define CLKID_HDMI_PLL_OD 126
#define CLKID_HDMI_PLL_OD2 127
#define CLKID_VID_PLL_SEL 130
#define CLKID_VID_PLL_DIV 131
#define CLKID_VCLK_SEL 132
#define CLKID_VCLK2_SEL 133
#define CLKID_VCLK_INPUT 134
#define CLKID_VCLK2_INPUT 135
#define CLKID_VCLK_DIV 136
#define CLKID_VCLK2_DIV 137
#define CLKID_VCLK_DIV2_EN 140
#define CLKID_VCLK_DIV4_EN 141
#define CLKID_VCLK_DIV6_EN 142
#define CLKID_VCLK_DIV12_EN 143
#define CLKID_VCLK2_DIV2_EN 144
#define CLKID_VCLK2_DIV4_EN 145
#define CLKID_VCLK2_DIV6_EN 146
#define CLKID_VCLK2_DIV12_EN 147
#define CLKID_CTS_ENCI_SEL 158
#define CLKID_CTS_ENCP_SEL 159
#define CLKID_CTS_VDAC_SEL 160
#define CLKID_HDMI_TX_SEL 161
#define CLKID_HDMI_SEL 166
#define CLKID_HDMI_DIV 167
#define CLKID_MALI_0_DIV 170
#define CLKID_MALI_1_DIV 173
#define CLKID_XTAL 0x10000000
#define XTAL_RATE 24000000
struct meson_clk {
struct regmap *map;
};
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);
#define NUM_CLKS 178
static struct meson_gate gates[NUM_CLKS] = {
/* Everything Else (EE) domain gates */
MESON_GATE(CLKID_SPICC0, HHI_GCLK_MPEG0, 8),
MESON_GATE(CLKID_I2C, HHI_GCLK_MPEG0, 9),
MESON_GATE(CLKID_UART0, HHI_GCLK_MPEG0, 13),
MESON_GATE(CLKID_SPICC1, HHI_GCLK_MPEG0, 14),
MESON_GATE(CLKID_SD_EMMC_B, HHI_GCLK_MPEG0, 25),
MESON_GATE(CLKID_SD_EMMC_C, HHI_GCLK_MPEG0, 26),
MESON_GATE(CLKID_ETH, HHI_GCLK_MPEG1, 3),
MESON_GATE(CLKID_UART1, HHI_GCLK_MPEG1, 16),
MESON_GATE(CLKID_USB, HHI_GCLK_MPEG1, 25),
MESON_GATE(CLKID_HTX_PCLK, HHI_GCLK_MPEG2, 4),
MESON_GATE(CLKID_USB1_DDR_BRIDGE, HHI_GCLK_MPEG2, 8),
MESON_GATE(CLKID_VPU_INTR, HHI_GCLK_MPEG2, 25),
/* Peripheral Gates */
MESON_GATE(CLKID_FCLK_DIV2, HHI_FIX_PLL_CNTL1, 24),
MESON_GATE(CLKID_FCLK_DIV3, HHI_FIX_PLL_CNTL1, 20),
MESON_GATE(CLKID_FCLK_DIV4, HHI_FIX_PLL_CNTL1, 21),
MESON_GATE(CLKID_FCLK_DIV5, HHI_FIX_PLL_CNTL1, 22),
MESON_GATE(CLKID_FCLK_DIV7, HHI_FIX_PLL_CNTL1, 23),
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),
MESON_GATE(CLKID_HDMI, HHI_HDMI_CLK_CNTL, 8),
};
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;
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[id];
if (gate->reg == 0)
return 0;
debug("%s: really %sabling %ld\n", __func__, on ? "en" : "dis", id);
regmap_update_bits(priv->map, 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);
case CLKID_VAPB_0:
return meson_set_gate_by_id(clk,
meson_mux_get_parent(clk, CLKID_VAPB_0_SEL), on);
case CLKID_VAPB_1:
return meson_set_gate_by_id(clk,
meson_mux_get_parent(clk, CLKID_VAPB_0_SEL), on);
case CLKID_VPU_0:
return meson_set_gate_by_id(clk,
meson_mux_get_parent(clk, CLKID_VPU_0_SEL), on);
case CLKID_VPU_1:
return meson_set_gate_by_id(clk,
meson_mux_get_parent(clk, CLKID_VPU_1_SEL), on);
}
return 0;
}
static int meson_clk_enable(struct clk *clk)
{
return meson_set_gate_by_id(clk, clk->id, true);
}
static int meson_clk_disable(struct clk *clk)
{
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 struct parm meson_hdmi_div_parm = {
HHI_HDMI_CLK_CNTL, 0, 7,
};
int meson_hdmi_div_parent = CLKID_HDMI_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;
uint 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;
case CLKID_HDMI_DIV:
parm = &meson_hdmi_div_parm;
parent = meson_hdmi_div_parent;
break;
default:
return -ENOENT;
}
regmap_read(priv->map, parm->reg_off, &reg);
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;
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;
case CLKID_HDMI_DIV:
parm = &meson_hdmi_div_parm;
parent = meson_hdmi_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);
regmap_update_bits(priv->map, parm->reg_off,
SETPMASK(parm->width, parm->shift),
(new_div - 1) << parm->shift);
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, 3,
};
static struct parm meson_vpu_1_mux_parm = {
HHI_VPU_CLK_CNTL, 25, 3,
};
static int meson_vpu_0_1_mux_parents[] = {
CLKID_FCLK_DIV3,
CLKID_FCLK_DIV4,
CLKID_FCLK_DIV5,
CLKID_FCLK_DIV7,
-ENOENT,
-ENOENT,
-ENOENT,
-ENOENT,
};
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 struct parm meson_hdmi_mux_parm = {
HHI_HDMI_CLK_CNTL, 9, 2,
};
static int meson_hdmi_mux_parents[] = {
CLKID_XTAL,
CLKID_FCLK_DIV4,
CLKID_FCLK_DIV3,
CLKID_FCLK_DIV5,
};
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;
uint 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;
case CLKID_HDMI_SEL:
parm = &meson_hdmi_mux_parm;
parents = meson_hdmi_mux_parents;
break;
default:
return -ENOENT;
}
regmap_read(priv->map, parm->reg_off, &reg);
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;
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;
case CLKID_HDMI_SEL:
parm = &meson_hdmi_mux_parm;
parents = meson_hdmi_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);
regmap_update_bits(priv->map, parm->reg_off,
SETPMASK(parm->width, parm->shift),
new_index << parm->shift);
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)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
unsigned long parent_rate;
uint reg;
int parents[] = {
CLKID_XTAL,
-1,
CLKID_FCLK_DIV7,
CLKID_MPLL1,
CLKID_MPLL2,
CLKID_FCLK_DIV4,
CLKID_FCLK_DIV3,
CLKID_FCLK_DIV5
};
/* mux */
regmap_read(priv->map, HHI_MPEG_CLK_CNTL, &reg);
reg = (reg >> 12) & 7;
switch (reg) {
case 1:
return -ENOENT;
default:
parent_rate = meson_clk_get_rate_by_id(clk, parents[reg]);
}
/* divider */
regmap_read(priv->map, HHI_MPEG_CLK_CNTL, &reg);
reg = reg & ((1 << 7) - 1);
return parent_rate / reg;
}
static long mpll_rate_from_params(unsigned long parent_rate,
unsigned long sdm,
unsigned long n2)
{
unsigned long divisor = (SDM_DEN * n2) + sdm;
if (n2 < N2_MIN)
return -EINVAL;
return DIV_ROUND_UP_ULL((u64)parent_rate * SDM_DEN, divisor);
}
static struct parm meson_mpll0_parm[2] = {
{HHI_MPLL_CNTL1, 0, 14}, /* psdm */
{HHI_MPLL_CNTL1, 20, 9}, /* pn2 */
};
static struct parm meson_mpll1_parm[2] = {
{HHI_MPLL_CNTL3, 0, 14}, /* psdm */
{HHI_MPLL_CNTL3, 20, 9}, /* pn2 */
};
static struct parm meson_mpll2_parm[2] = {
{HHI_MPLL_CNTL5, 0, 14}, /* psdm */
{HHI_MPLL_CNTL5, 20, 9}, /* pn2 */
};
/*
* MultiPhase Locked Loops are outputs from a PLL with additional frequency
* scaling capabilities. MPLL rates are calculated as:
*
* f(N2_integer, SDM_IN ) = 2.0G/(N2_integer + SDM_IN/16384)
*/
static ulong meson_mpll_get_rate(struct clk *clk, unsigned long id)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
struct parm *psdm, *pn2;
unsigned long sdm, n2;
unsigned long parent_rate;
uint reg;
switch (id) {
case CLKID_MPLL0:
psdm = &meson_mpll0_parm[0];
pn2 = &meson_mpll0_parm[1];
break;
case CLKID_MPLL1:
psdm = &meson_mpll1_parm[0];
pn2 = &meson_mpll1_parm[1];
break;
case CLKID_MPLL2:
psdm = &meson_mpll2_parm[0];
pn2 = &meson_mpll2_parm[1];
break;
default:
return -ENOENT;
}
parent_rate = meson_clk_get_rate_by_id(clk, CLKID_FIXED_PLL);
if (IS_ERR_VALUE(parent_rate))
return parent_rate;
regmap_read(priv->map, psdm->reg_off, &reg);
sdm = PARM_GET(psdm->width, psdm->shift, reg);
regmap_read(priv->map, pn2->reg_off, &reg);
n2 = PARM_GET(pn2->width, pn2->shift, reg);
return mpll_rate_from_params(parent_rate, sdm, n2);
}
static struct parm meson_fixed_pll_parm[4] = {
{HHI_FIX_PLL_CNTL0, 0, 9}, /* pm */
{HHI_FIX_PLL_CNTL0, 10, 5}, /* pn */
{HHI_FIX_PLL_CNTL0, 16, 2}, /* pod */
{HHI_FIX_PLL_CNTL1, 0, 17}, /* pfrac */
};
static struct parm meson_sys_pll_parm[3] = {
{HHI_SYS_PLL_CNTL0, 0, 9}, /* pm */
{HHI_SYS_PLL_CNTL0, 10, 5}, /* pn */
{HHI_SYS_PLL_CNTL0, 16, 3}, /* pod */
};
static ulong meson_pll_get_rate(struct clk *clk, unsigned long id)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
struct parm *pm, *pn, *pod, *pfrac = NULL;
unsigned long parent_rate_mhz = XTAL_RATE / 1000000;
u16 n, m, od, frac;
ulong rate;
uint reg;
/*
* FIXME: Between the unit conversion and the missing frac, we know
* rate will be slightly off ...
*/
switch (id) {
case CLKID_FIXED_PLL:
pm = &meson_fixed_pll_parm[0];
pn = &meson_fixed_pll_parm[1];
pod = &meson_fixed_pll_parm[2];
pfrac = &meson_fixed_pll_parm[3];
break;
case CLKID_SYS_PLL:
pm = &meson_sys_pll_parm[0];
pn = &meson_sys_pll_parm[1];
pod = &meson_sys_pll_parm[2];
break;
default:
return -ENOENT;
}
regmap_read(priv->map, pn->reg_off, &reg);
n = PARM_GET(pn->width, pn->shift, reg);
regmap_read(priv->map, pm->reg_off, &reg);
m = PARM_GET(pm->width, pm->shift, reg);
regmap_read(priv->map, pod->reg_off, &reg);
od = PARM_GET(pod->width, pod->shift, reg);
rate = parent_rate_mhz * m;
if (pfrac) {
ulong frac_rate;
regmap_read(priv->map, pfrac->reg_off, &reg);
frac = PARM_GET(pfrac->width - 1, pfrac->shift, reg);
frac_rate = DIV_ROUND_UP_ULL((u64)parent_rate_mhz * frac,
1 << (pfrac->width - 2));
if (frac & BIT(pfrac->width - 1))
rate -= frac_rate;
else
rate += frac_rate;
}
return (DIV_ROUND_UP_ULL(rate, n) >> od) * 1000000;
}
static struct parm meson_pcie_pll_parm[3] = {
{HHI_PCIE_PLL_CNTL0, 0, 8}, /* pm */
{HHI_PCIE_PLL_CNTL0, 10, 5}, /* pn */
{HHI_PCIE_PLL_CNTL0, 16, 5}, /* pod */
};
static ulong meson_pcie_pll_get_rate(struct clk *clk)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
struct parm *pm, *pn, *pod;
unsigned long parent_rate_mhz = XTAL_RATE / 1000000;
u16 n, m, od;
uint reg;
pm = &meson_pcie_pll_parm[0];
pn = &meson_pcie_pll_parm[1];
pod = &meson_pcie_pll_parm[2];
regmap_read(priv->map, pn->reg_off, &reg);
n = PARM_GET(pn->width, pn->shift, reg);
regmap_read(priv->map, pm->reg_off, &reg);
m = PARM_GET(pm->width, pm->shift, reg);
regmap_read(priv->map, pod->reg_off, &reg);
od = PARM_GET(pod->width, pod->shift, reg);
return ((parent_rate_mhz * m / n) / 2 / od / 2) * 1000000;
}
static ulong meson_clk_get_rate_by_id(struct clk *clk, unsigned long id)
{
ulong rate;
switch (id) {
case CLKID_XTAL:
rate = XTAL_RATE;
break;
case CLKID_FIXED_PLL:
case CLKID_SYS_PLL:
rate = meson_pll_get_rate(clk, id);
break;
case CLKID_FCLK_DIV2:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 2;
break;
case CLKID_FCLK_DIV3:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 3;
break;
case CLKID_FCLK_DIV4:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 4;
break;
case CLKID_FCLK_DIV5:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 5;
break;
case CLKID_FCLK_DIV7:
rate = meson_pll_get_rate(clk, CLKID_FIXED_PLL) / 7;
break;
case CLKID_MPLL0:
case CLKID_MPLL1:
case CLKID_MPLL2:
rate = meson_mpll_get_rate(clk, id);
break;
case CLKID_CLK81:
rate = meson_clk81_get_rate(clk);
break;
case CLKID_PCIE_PLL:
rate = meson_pcie_pll_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_HDMI:
rate = meson_div_get_rate(clk, CLKID_HDMI_DIV);
break;
case CLKID_VPU_0_DIV:
case CLKID_VPU_1_DIV:
case CLKID_VAPB_0_DIV:
case CLKID_VAPB_1_DIV:
case CLKID_HDMI_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:
case CLKID_HDMI_SEL:
rate = meson_mux_get_rate(clk, id);
break;
default:
if (gates[id].reg != 0) {
/* a clock gate */
rate = meson_clk81_get_rate(clk);
break;
}
return -ENOENT;
}
debug("clock %lu has rate %lu\n", id, rate);
return rate;
}
static ulong meson_clk_get_rate(struct clk *clk)
{
return meson_clk_get_rate_by_id(clk, clk->id);
}
static ulong meson_pcie_pll_set_rate(struct clk *clk, ulong rate)
{
struct meson_clk *priv = dev_get_priv(clk->dev);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL0, 0x20090496);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL0, 0x30090496);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL1, 0x00000000);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL2, 0x00001100);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL3, 0x10058e00);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL4, 0x000100c0);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL5, 0x68000048);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL5, 0x68000068);
udelay(20);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL4, 0x008100c0);
udelay(10);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL0, 0x34090496);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL0, 0x14090496);
udelay(10);
regmap_write(priv->map, HHI_PCIE_PLL_CNTL2, 0x00001000);
regmap_update_bits(priv->map, HHI_PCIE_PLL_CNTL0,
0x1f << 16, 9 << 16);
return 100000000;
}
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;
case CLKID_PCIE_PLL:
return meson_pcie_pll_set_rate(clk, rate);
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:
case CLKID_HDMI_DIV:
return meson_div_set_rate(clk, id, rate, current_rate);
case CLKID_HDMI:
return meson_clk_set_rate_by_id(clk, CLKID_HDMI_DIV,
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;
debug("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);
priv->map = syscon_node_to_regmap(dev_get_parent(dev)->node);
if (IS_ERR(priv->map))
return PTR_ERR(priv->map);
/*
* Depending on the boot src, the state of the MMC clock might
* be different. Reset it to make sure we won't get stuck
*/
regmap_write(priv->map, HHI_NAND_CLK_CNTL, 0);
regmap_write(priv->map, HHI_SD_EMMC_CLK_CNTL, 0);
debug("meson-clk-g12a: probed\n");
return 0;
}
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[] = {
{ .compatible = "amlogic,g12a-clkc" },
{ .compatible = "amlogic,g12b-clkc" },
{ .compatible = "amlogic,sm1-clkc" },
{ }
};
U_BOOT_DRIVER(meson_clk_g12a) = {
.name = "meson_clk_g12a",
.id = UCLASS_CLK,
.of_match = meson_clk_ids,
.priv_auto_alloc_size = sizeof(struct meson_clk),
.ops = &meson_clk_ops,
.probe = meson_clk_probe,
};