u-boot/drivers/clk/rockchip/clk_rk3188.c
Alexander Kochetkov 5e15dcb4cb rockchip: clk: rk3188: change APLL to safe 600MHz
The commit 84a6a27ae3 ("rockchip: rk3188: init CPU freq in clock
driver") changed ARM clock from 600MHz to 1600MHz. It made boot
unstable due to the fact that PMIC at the start generates insufficient
voltage for operation. See also: commit f4f57c58b5 ("rockchip:
rk3188: Setup the armclk in spl").

Fixes commit 84a6a27ae3 ("rockchip: rk3188: init CPU freq in clock
driver").

Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2020-06-27 23:23:00 +08:00

625 lines
16 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* (C) Copyright 2015 Google, Inc
* (C) Copyright 2016 Heiko Stuebner <heiko@sntech.de>
*/
#include <common.h>
#include <clk-uclass.h>
#include <dm.h>
#include <dt-structs.h>
#include <errno.h>
#include <log.h>
#include <malloc.h>
#include <mapmem.h>
#include <syscon.h>
#include <asm/io.h>
#include <asm/arch-rockchip/clock.h>
#include <asm/arch-rockchip/cru_rk3188.h>
#include <asm/arch-rockchip/grf_rk3188.h>
#include <asm/arch-rockchip/hardware.h>
#include <dt-bindings/clock/rk3188-cru.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/uclass-internal.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/log2.h>
#include <linux/stringify.h>
enum rk3188_clk_type {
RK3188_CRU,
RK3188A_CRU,
};
struct rk3188_clk_plat {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct dtd_rockchip_rk3188_cru dtd;
#endif
};
struct pll_div {
u32 nr;
u32 nf;
u32 no;
};
enum {
VCO_MAX_HZ = 2200U * 1000000,
VCO_MIN_HZ = 440 * 1000000,
OUTPUT_MAX_HZ = 2200U * 1000000,
OUTPUT_MIN_HZ = 30 * 1000000,
FREF_MAX_HZ = 2200U * 1000000,
FREF_MIN_HZ = 30 * 1000,
};
enum {
/* PLL CON0 */
PLL_OD_MASK = 0x0f,
/* PLL CON1 */
PLL_NF_MASK = 0x1fff,
/* PLL CON2 */
PLL_BWADJ_MASK = 0x0fff,
/* PLL CON3 */
PLL_RESET_SHIFT = 5,
/* GRF_SOC_STATUS0 */
SOCSTS_DPLL_LOCK = 1 << 5,
SOCSTS_APLL_LOCK = 1 << 6,
SOCSTS_CPLL_LOCK = 1 << 7,
SOCSTS_GPLL_LOCK = 1 << 8,
};
#define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1))
#define PLL_DIVISORS(hz, _nr, _no) {\
.nr = _nr, .nf = (u32)((u64)hz * _nr * _no / OSC_HZ), .no = _no};\
_Static_assert(((u64)hz * _nr * _no / OSC_HZ) * OSC_HZ /\
(_nr * _no) == hz, #hz "Hz cannot be hit with PLL "\
"divisors on line " __stringify(__LINE__));
/* Keep divisors as low as possible to reduce jitter and power usage */
#ifdef CONFIG_SPL_BUILD
static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2);
static const struct pll_div cpll_init_cfg = PLL_DIVISORS(CPLL_HZ, 1, 2);
#endif
static int rkclk_set_pll(struct rk3188_cru *cru, enum rk_clk_id clk_id,
const struct pll_div *div, bool has_bwadj)
{
int pll_id = rk_pll_id(clk_id);
struct rk3188_pll *pll = &cru->pll[pll_id];
/* All PLLs have same VCO and output frequency range restrictions. */
uint vco_hz = OSC_HZ / 1000 * div->nf / div->nr * 1000;
uint output_hz = vco_hz / div->no;
debug("PLL at %x: nf=%d, nr=%d, no=%d, vco=%u Hz, output=%u Hz\n",
(uint)pll, div->nf, div->nr, div->no, vco_hz, output_hz);
assert(vco_hz >= VCO_MIN_HZ && vco_hz <= VCO_MAX_HZ &&
output_hz >= OUTPUT_MIN_HZ && output_hz <= OUTPUT_MAX_HZ &&
(div->no == 1 || !(div->no % 2)));
/* enter reset */
rk_setreg(&pll->con3, 1 << PLL_RESET_SHIFT);
rk_clrsetreg(&pll->con0,
CLKR_MASK << CLKR_SHIFT | PLL_OD_MASK,
((div->nr - 1) << CLKR_SHIFT) | (div->no - 1));
rk_clrsetreg(&pll->con1, CLKF_MASK, div->nf - 1);
if (has_bwadj)
rk_clrsetreg(&pll->con2, PLL_BWADJ_MASK, (div->nf >> 1) - 1);
udelay(10);
/* return from reset */
rk_clrreg(&pll->con3, 1 << PLL_RESET_SHIFT);
return 0;
}
static int rkclk_configure_ddr(struct rk3188_cru *cru, struct rk3188_grf *grf,
unsigned int hz, bool has_bwadj)
{
static const struct pll_div dpll_cfg[] = {
{.nf = 75, .nr = 1, .no = 6},
{.nf = 400, .nr = 9, .no = 2},
{.nf = 500, .nr = 9, .no = 2},
{.nf = 100, .nr = 3, .no = 1},
};
int cfg;
switch (hz) {
case 300000000:
cfg = 0;
break;
case 533000000: /* actually 533.3P MHz */
cfg = 1;
break;
case 666000000: /* actually 666.6P MHz */
cfg = 2;
break;
case 800000000:
cfg = 3;
break;
default:
debug("Unsupported SDRAM frequency");
return -EINVAL;
}
/* pll enter slow-mode */
rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK << DPLL_MODE_SHIFT,
DPLL_MODE_SLOW << DPLL_MODE_SHIFT);
rkclk_set_pll(cru, CLK_DDR, &dpll_cfg[cfg], has_bwadj);
/* wait for pll lock */
while (!(readl(&grf->soc_status0) & SOCSTS_DPLL_LOCK))
udelay(1);
/* PLL enter normal-mode */
rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK << DPLL_MODE_SHIFT,
DPLL_MODE_NORMAL << DPLL_MODE_SHIFT);
return 0;
}
static int rkclk_configure_cpu(struct rk3188_cru *cru, struct rk3188_grf *grf,
unsigned int hz, bool has_bwadj)
{
static const struct pll_div apll_cfg[] = {
{.nf = 50, .nr = 1, .no = 2},
{.nf = 67, .nr = 1, .no = 1},
};
int div_core_peri, div_aclk_core, cfg;
/*
* We support two possible frequencies, the safe 600MHz
* which will work with default pmic settings and will
* be set in SPL to get away from the 24MHz default and
* the maximum of 1.6Ghz, which boards can set if they
* were able to get pmic support for it.
*/
switch (hz) {
case APLL_SAFE_HZ:
cfg = 0;
div_core_peri = 1;
div_aclk_core = 3;
break;
case APLL_HZ:
cfg = 1;
div_core_peri = 2;
div_aclk_core = 3;
break;
default:
debug("Unsupported ARMCLK frequency");
return -EINVAL;
}
/* pll enter slow-mode */
rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK << APLL_MODE_SHIFT,
APLL_MODE_SLOW << APLL_MODE_SHIFT);
rkclk_set_pll(cru, CLK_ARM, &apll_cfg[cfg], has_bwadj);
/* waiting for pll lock */
while (!(readl(&grf->soc_status0) & SOCSTS_APLL_LOCK))
udelay(1);
/* Set divider for peripherals attached to the cpu core. */
rk_clrsetreg(&cru->cru_clksel_con[0],
CORE_PERI_DIV_MASK << CORE_PERI_DIV_SHIFT,
div_core_peri << CORE_PERI_DIV_SHIFT);
/* set up dependent divisor for aclk_core */
rk_clrsetreg(&cru->cru_clksel_con[1],
CORE_ACLK_DIV_MASK << CORE_ACLK_DIV_SHIFT,
div_aclk_core << CORE_ACLK_DIV_SHIFT);
/* PLL enter normal-mode */
rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK << APLL_MODE_SHIFT,
APLL_MODE_NORMAL << APLL_MODE_SHIFT);
return hz;
}
/* Get pll rate by id */
static uint32_t rkclk_pll_get_rate(struct rk3188_cru *cru,
enum rk_clk_id clk_id)
{
uint32_t nr, no, nf;
uint32_t con;
int pll_id = rk_pll_id(clk_id);
struct rk3188_pll *pll = &cru->pll[pll_id];
static u8 clk_shift[CLK_COUNT] = {
0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, CPLL_MODE_SHIFT,
GPLL_MODE_SHIFT
};
uint shift;
con = readl(&cru->cru_mode_con);
shift = clk_shift[clk_id];
switch ((con >> shift) & APLL_MODE_MASK) {
case APLL_MODE_SLOW:
return OSC_HZ;
case APLL_MODE_NORMAL:
/* normal mode */
con = readl(&pll->con0);
no = ((con >> CLKOD_SHIFT) & CLKOD_MASK) + 1;
nr = ((con >> CLKR_SHIFT) & CLKR_MASK) + 1;
con = readl(&pll->con1);
nf = ((con >> CLKF_SHIFT) & CLKF_MASK) + 1;
return (24 * nf / (nr * no)) * 1000000;
case APLL_MODE_DEEP:
default:
return 32768;
}
}
static ulong rockchip_mmc_get_clk(struct rk3188_cru *cru, uint gclk_rate,
int periph)
{
uint div;
u32 con;
switch (periph) {
case HCLK_EMMC:
case SCLK_EMMC:
con = readl(&cru->cru_clksel_con[12]);
div = (con >> EMMC_DIV_SHIFT) & EMMC_DIV_MASK;
break;
case HCLK_SDMMC:
case SCLK_SDMMC:
con = readl(&cru->cru_clksel_con[11]);
div = (con >> MMC0_DIV_SHIFT) & MMC0_DIV_MASK;
break;
case HCLK_SDIO:
case SCLK_SDIO:
con = readl(&cru->cru_clksel_con[12]);
div = (con >> SDIO_DIV_SHIFT) & SDIO_DIV_MASK;
break;
default:
return -EINVAL;
}
return DIV_TO_RATE(gclk_rate, div) / 2;
}
static ulong rockchip_mmc_set_clk(struct rk3188_cru *cru, uint gclk_rate,
int periph, uint freq)
{
int src_clk_div;
debug("%s: gclk_rate=%u\n", __func__, gclk_rate);
/* mmc clock defaulg div 2 internal, need provide double in cru */
src_clk_div = DIV_ROUND_UP(gclk_rate / 2, freq) - 1;
assert(src_clk_div <= 0x3f);
switch (periph) {
case HCLK_EMMC:
case SCLK_EMMC:
rk_clrsetreg(&cru->cru_clksel_con[12],
EMMC_DIV_MASK << EMMC_DIV_SHIFT,
src_clk_div << EMMC_DIV_SHIFT);
break;
case HCLK_SDMMC:
case SCLK_SDMMC:
rk_clrsetreg(&cru->cru_clksel_con[11],
MMC0_DIV_MASK << MMC0_DIV_SHIFT,
src_clk_div << MMC0_DIV_SHIFT);
break;
case HCLK_SDIO:
case SCLK_SDIO:
rk_clrsetreg(&cru->cru_clksel_con[12],
SDIO_DIV_MASK << SDIO_DIV_SHIFT,
src_clk_div << SDIO_DIV_SHIFT);
break;
default:
return -EINVAL;
}
return rockchip_mmc_get_clk(cru, gclk_rate, periph);
}
static ulong rockchip_spi_get_clk(struct rk3188_cru *cru, uint gclk_rate,
int periph)
{
uint div;
u32 con;
switch (periph) {
case SCLK_SPI0:
con = readl(&cru->cru_clksel_con[25]);
div = (con >> SPI0_DIV_SHIFT) & SPI0_DIV_MASK;
break;
case SCLK_SPI1:
con = readl(&cru->cru_clksel_con[25]);
div = (con >> SPI1_DIV_SHIFT) & SPI1_DIV_MASK;
break;
default:
return -EINVAL;
}
return DIV_TO_RATE(gclk_rate, div);
}
static ulong rockchip_spi_set_clk(struct rk3188_cru *cru, uint gclk_rate,
int periph, uint freq)
{
int src_clk_div = DIV_ROUND_UP(gclk_rate, freq) - 1;
assert(src_clk_div < 128);
switch (periph) {
case SCLK_SPI0:
assert(src_clk_div <= SPI0_DIV_MASK);
rk_clrsetreg(&cru->cru_clksel_con[25],
SPI0_DIV_MASK << SPI0_DIV_SHIFT,
src_clk_div << SPI0_DIV_SHIFT);
break;
case SCLK_SPI1:
assert(src_clk_div <= SPI1_DIV_MASK);
rk_clrsetreg(&cru->cru_clksel_con[25],
SPI1_DIV_MASK << SPI1_DIV_SHIFT,
src_clk_div << SPI1_DIV_SHIFT);
break;
default:
return -EINVAL;
}
return rockchip_spi_get_clk(cru, gclk_rate, periph);
}
#ifdef CONFIG_SPL_BUILD
static void rkclk_init(struct rk3188_cru *cru, struct rk3188_grf *grf,
bool has_bwadj)
{
u32 aclk_div, hclk_div, pclk_div, h2p_div;
/* pll enter slow-mode */
rk_clrsetreg(&cru->cru_mode_con,
GPLL_MODE_MASK << GPLL_MODE_SHIFT |
CPLL_MODE_MASK << CPLL_MODE_SHIFT,
GPLL_MODE_SLOW << GPLL_MODE_SHIFT |
CPLL_MODE_SLOW << CPLL_MODE_SHIFT);
/* init pll */
rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg, has_bwadj);
rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg, has_bwadj);
/* waiting for pll lock */
while ((readl(&grf->soc_status0) &
(SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) !=
(SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK))
udelay(1);
/*
* cpu clock pll source selection and
* reparent aclk_cpu_pre from apll to gpll
* set up dependent divisors for PCLK/HCLK and ACLK clocks.
*/
aclk_div = DIV_ROUND_UP(GPLL_HZ, CPU_ACLK_HZ) - 1;
assert((aclk_div + 1) * CPU_ACLK_HZ == GPLL_HZ && aclk_div <= 0x1f);
rk_clrsetreg(&cru->cru_clksel_con[0],
CPU_ACLK_PLL_MASK << CPU_ACLK_PLL_SHIFT |
A9_CPU_DIV_MASK << A9_CPU_DIV_SHIFT,
CPU_ACLK_PLL_SELECT_GPLL << CPU_ACLK_PLL_SHIFT |
aclk_div << A9_CPU_DIV_SHIFT);
hclk_div = ilog2(CPU_ACLK_HZ / CPU_HCLK_HZ);
assert((1 << hclk_div) * CPU_HCLK_HZ == CPU_ACLK_HZ && hclk_div < 0x3);
pclk_div = ilog2(CPU_ACLK_HZ / CPU_PCLK_HZ);
assert((1 << pclk_div) * CPU_PCLK_HZ == CPU_ACLK_HZ && pclk_div < 0x4);
h2p_div = ilog2(CPU_HCLK_HZ / CPU_H2P_HZ);
assert((1 << h2p_div) * CPU_H2P_HZ == CPU_HCLK_HZ && pclk_div < 0x3);
rk_clrsetreg(&cru->cru_clksel_con[1],
AHB2APB_DIV_MASK << AHB2APB_DIV_SHIFT |
CPU_PCLK_DIV_MASK << CPU_PCLK_DIV_SHIFT |
CPU_HCLK_DIV_MASK << CPU_HCLK_DIV_SHIFT,
h2p_div << AHB2APB_DIV_SHIFT |
pclk_div << CPU_PCLK_DIV_SHIFT |
hclk_div << CPU_HCLK_DIV_SHIFT);
/*
* peri clock pll source selection and
* set up dependent divisors for PCLK/HCLK and ACLK clocks.
*/
aclk_div = GPLL_HZ / PERI_ACLK_HZ - 1;
assert((aclk_div + 1) * PERI_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f);
hclk_div = ilog2(PERI_ACLK_HZ / PERI_HCLK_HZ);
assert((1 << hclk_div) * PERI_HCLK_HZ ==
PERI_ACLK_HZ && (hclk_div < 0x4));
pclk_div = ilog2(PERI_ACLK_HZ / PERI_PCLK_HZ);
assert((1 << pclk_div) * PERI_PCLK_HZ ==
PERI_ACLK_HZ && (pclk_div < 0x4));
rk_clrsetreg(&cru->cru_clksel_con[10],
PERI_PCLK_DIV_MASK << PERI_PCLK_DIV_SHIFT |
PERI_HCLK_DIV_MASK << PERI_HCLK_DIV_SHIFT |
PERI_ACLK_DIV_MASK << PERI_ACLK_DIV_SHIFT,
PERI_SEL_GPLL << PERI_SEL_PLL_SHIFT |
pclk_div << PERI_PCLK_DIV_SHIFT |
hclk_div << PERI_HCLK_DIV_SHIFT |
aclk_div << PERI_ACLK_DIV_SHIFT);
/* PLL enter normal-mode */
rk_clrsetreg(&cru->cru_mode_con,
GPLL_MODE_MASK << GPLL_MODE_SHIFT |
CPLL_MODE_MASK << CPLL_MODE_SHIFT,
GPLL_MODE_NORMAL << GPLL_MODE_SHIFT |
CPLL_MODE_NORMAL << CPLL_MODE_SHIFT);
rockchip_mmc_set_clk(cru, PERI_HCLK_HZ, HCLK_SDMMC, 16000000);
}
#endif
static ulong rk3188_clk_get_rate(struct clk *clk)
{
struct rk3188_clk_priv *priv = dev_get_priv(clk->dev);
ulong new_rate, gclk_rate;
gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL);
switch (clk->id) {
case 1 ... 4:
new_rate = rkclk_pll_get_rate(priv->cru, clk->id);
break;
case HCLK_EMMC:
case HCLK_SDMMC:
case HCLK_SDIO:
case SCLK_EMMC:
case SCLK_SDMMC:
case SCLK_SDIO:
new_rate = rockchip_mmc_get_clk(priv->cru, PERI_HCLK_HZ,
clk->id);
break;
case SCLK_SPI0:
case SCLK_SPI1:
new_rate = rockchip_spi_get_clk(priv->cru, PERI_PCLK_HZ,
clk->id);
break;
case PCLK_I2C0:
case PCLK_I2C1:
case PCLK_I2C2:
case PCLK_I2C3:
case PCLK_I2C4:
return gclk_rate;
default:
return -ENOENT;
}
return new_rate;
}
static ulong rk3188_clk_set_rate(struct clk *clk, ulong rate)
{
struct rk3188_clk_priv *priv = dev_get_priv(clk->dev);
struct rk3188_cru *cru = priv->cru;
ulong new_rate;
switch (clk->id) {
case PLL_APLL:
new_rate = rkclk_configure_cpu(priv->cru, priv->grf, rate,
priv->has_bwadj);
break;
case CLK_DDR:
new_rate = rkclk_configure_ddr(priv->cru, priv->grf, rate,
priv->has_bwadj);
break;
case HCLK_EMMC:
case HCLK_SDMMC:
case HCLK_SDIO:
case SCLK_EMMC:
case SCLK_SDMMC:
case SCLK_SDIO:
new_rate = rockchip_mmc_set_clk(cru, PERI_HCLK_HZ,
clk->id, rate);
break;
case SCLK_SPI0:
case SCLK_SPI1:
new_rate = rockchip_spi_set_clk(cru, PERI_PCLK_HZ,
clk->id, rate);
break;
default:
return -ENOENT;
}
return new_rate;
}
static struct clk_ops rk3188_clk_ops = {
.get_rate = rk3188_clk_get_rate,
.set_rate = rk3188_clk_set_rate,
};
static int rk3188_clk_ofdata_to_platdata(struct udevice *dev)
{
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
struct rk3188_clk_priv *priv = dev_get_priv(dev);
priv->cru = dev_read_addr_ptr(dev);
#endif
return 0;
}
static int rk3188_clk_probe(struct udevice *dev)
{
struct rk3188_clk_priv *priv = dev_get_priv(dev);
enum rk3188_clk_type type = dev_get_driver_data(dev);
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
if (IS_ERR(priv->grf))
return PTR_ERR(priv->grf);
priv->has_bwadj = (type == RK3188A_CRU) ? 1 : 0;
#ifdef CONFIG_SPL_BUILD
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct rk3188_clk_plat *plat = dev_get_platdata(dev);
priv->cru = map_sysmem(plat->dtd.reg[0], plat->dtd.reg[1]);
#endif
rkclk_init(priv->cru, priv->grf, priv->has_bwadj);
/* Init CPU frequency */
rkclk_configure_cpu(priv->cru, priv->grf, APLL_SAFE_HZ,
priv->has_bwadj);
#endif
return 0;
}
static int rk3188_clk_bind(struct udevice *dev)
{
int ret;
struct udevice *sys_child;
struct sysreset_reg *priv;
/* The reset driver does not have a device node, so bind it here */
ret = device_bind_driver(dev, "rockchip_sysreset", "sysreset",
&sys_child);
if (ret) {
debug("Warning: No sysreset driver: ret=%d\n", ret);
} else {
priv = malloc(sizeof(struct sysreset_reg));
priv->glb_srst_fst_value = offsetof(struct rk3188_cru,
cru_glb_srst_fst_value);
priv->glb_srst_snd_value = offsetof(struct rk3188_cru,
cru_glb_srst_snd_value);
sys_child->priv = priv;
}
#if CONFIG_IS_ENABLED(RESET_ROCKCHIP)
ret = offsetof(struct rk3188_cru, cru_softrst_con[0]);
ret = rockchip_reset_bind(dev, ret, 9);
if (ret)
debug("Warning: software reset driver bind faile\n");
#endif
return 0;
}
static const struct udevice_id rk3188_clk_ids[] = {
{ .compatible = "rockchip,rk3188-cru", .data = RK3188_CRU },
{ .compatible = "rockchip,rk3188a-cru", .data = RK3188A_CRU },
{ }
};
U_BOOT_DRIVER(rockchip_rk3188_cru) = {
.name = "rockchip_rk3188_cru",
.id = UCLASS_CLK,
.of_match = rk3188_clk_ids,
.priv_auto_alloc_size = sizeof(struct rk3188_clk_priv),
.platdata_auto_alloc_size = sizeof(struct rk3188_clk_plat),
.ops = &rk3188_clk_ops,
.bind = rk3188_clk_bind,
.ofdata_to_platdata = rk3188_clk_ofdata_to_platdata,
.probe = rk3188_clk_probe,
};