diff options
Diffstat (limited to 'drivers/clk')
| -rw-r--r-- | drivers/clk/rockchip/Makefile | 1 | ||||
| -rw-r--r-- | drivers/clk/rockchip/clk_rk322x.c | 413 |
2 files changed, 414 insertions, 0 deletions
diff --git a/drivers/clk/rockchip/Makefile b/drivers/clk/rockchip/Makefile index e404c0cdb90..c50aff2e93d 100644 --- a/drivers/clk/rockchip/Makefile +++ b/drivers/clk/rockchip/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_ROCKCHIP_RK3036) += clk_rk3036.o obj-$(CONFIG_ROCKCHIP_RK3188) += clk_rk3188.o +obj-$(CONFIG_ROCKCHIP_RK322X) += clk_rk322x.o obj-$(CONFIG_ROCKCHIP_RK3288) += clk_rk3288.o obj-$(CONFIG_ROCKCHIP_RK3328) += clk_rk3328.o obj-$(CONFIG_ROCKCHIP_RK3368) += clk_rk3368.o diff --git a/drivers/clk/rockchip/clk_rk322x.c b/drivers/clk/rockchip/clk_rk322x.c new file mode 100644 index 00000000000..fdeb816e231 --- /dev/null +++ b/drivers/clk/rockchip/clk_rk322x.c @@ -0,0 +1,413 @@ +/* + * (C) Copyright 2017 Rockchip Electronics Co., Ltd + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <clk-uclass.h> +#include <dm.h> +#include <errno.h> +#include <syscon.h> +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/cru_rk322x.h> +#include <asm/arch/hardware.h> +#include <dm/lists.h> +#include <dt-bindings/clock/rk3228-cru.h> +#include <linux/log2.h> + +DECLARE_GLOBAL_DATA_PTR; + +enum { + VCO_MAX_HZ = 3200U * 1000000, + VCO_MIN_HZ = 800 * 1000000, + OUTPUT_MAX_HZ = 3200U * 1000000, + OUTPUT_MIN_HZ = 24 * 1000000, +}; + +#define RATE_TO_DIV(input_rate, output_rate) \ + ((input_rate) / (output_rate) - 1); + +#define DIV_TO_RATE(input_rate, div) ((input_rate) / ((div) + 1)) + +#define PLL_DIVISORS(hz, _refdiv, _postdiv1, _postdiv2) {\ + .refdiv = _refdiv,\ + .fbdiv = (u32)((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ), \ + .postdiv1 = _postdiv1, .postdiv2 = _postdiv2};\ + _Static_assert(((u64)hz * _refdiv * _postdiv1 * _postdiv2 / OSC_HZ) * \ + OSC_HZ / (_refdiv * _postdiv1 * _postdiv2) == hz, \ + #hz "Hz cannot be hit with PLL "\ + "divisors on line " __stringify(__LINE__)); + +/* use integer mode*/ +static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 3, 1); +static const struct pll_div gpll_init_cfg = PLL_DIVISORS(GPLL_HZ, 2, 2, 1); + +static int rkclk_set_pll(struct rk322x_cru *cru, enum rk_clk_id clk_id, + const struct pll_div *div) +{ + int pll_id = rk_pll_id(clk_id); + struct rk322x_pll *pll = &cru->pll[pll_id]; + + /* All PLLs have same VCO and output frequency range restrictions. */ + uint vco_hz = OSC_HZ / 1000 * div->fbdiv / div->refdiv * 1000; + uint output_hz = vco_hz / div->postdiv1 / div->postdiv2; + + debug("PLL at %p: fb=%d, ref=%d, pst1=%d, pst2=%d, vco=%u Hz, output=%u Hz\n", + pll, div->fbdiv, div->refdiv, div->postdiv1, + div->postdiv2, 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); + + /* use integer mode */ + rk_setreg(&pll->con1, 1 << PLL_DSMPD_SHIFT); + /* Power down */ + rk_setreg(&pll->con1, 1 << PLL_PD_SHIFT); + + rk_clrsetreg(&pll->con0, + PLL_POSTDIV1_MASK | PLL_FBDIV_MASK, + (div->postdiv1 << PLL_POSTDIV1_SHIFT) | div->fbdiv); + rk_clrsetreg(&pll->con1, PLL_POSTDIV2_MASK | PLL_REFDIV_MASK, + (div->postdiv2 << PLL_POSTDIV2_SHIFT | + div->refdiv << PLL_REFDIV_SHIFT)); + + /* Power Up */ + rk_clrreg(&pll->con1, 1 << PLL_PD_SHIFT); + + /* waiting for pll lock */ + while (readl(&pll->con1) & (1 << PLL_LOCK_STATUS_SHIFT)) + udelay(1); + + return 0; +} + +static void rkclk_init(struct rk322x_cru *cru) +{ + u32 aclk_div; + u32 hclk_div; + u32 pclk_div; + + /* pll enter slow-mode */ + rk_clrsetreg(&cru->cru_mode_con, + GPLL_MODE_MASK | APLL_MODE_MASK, + GPLL_MODE_SLOW << GPLL_MODE_SHIFT | + APLL_MODE_SLOW << APLL_MODE_SHIFT); + + /* init pll */ + rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg); + rkclk_set_pll(cru, CLK_GENERAL, &gpll_init_cfg); + + /* + * select apll as cpu/core clock pll source and + * set up dependent divisors for PERI and ACLK clocks. + * core hz : apll = 1:1 + */ + aclk_div = APLL_HZ / CORE_ACLK_HZ - 1; + assert((aclk_div + 1) * CORE_ACLK_HZ == APLL_HZ && aclk_div < 0x7); + + pclk_div = APLL_HZ / CORE_PERI_HZ - 1; + assert((pclk_div + 1) * CORE_PERI_HZ == APLL_HZ && pclk_div < 0xf); + + rk_clrsetreg(&cru->cru_clksel_con[0], + CORE_CLK_PLL_SEL_MASK | CORE_DIV_CON_MASK, + CORE_CLK_PLL_SEL_APLL << CORE_CLK_PLL_SEL_SHIFT | + 0 << CORE_DIV_CON_SHIFT); + + rk_clrsetreg(&cru->cru_clksel_con[1], + CORE_ACLK_DIV_MASK | CORE_PERI_DIV_MASK, + aclk_div << CORE_ACLK_DIV_SHIFT | + pclk_div << CORE_PERI_DIV_SHIFT); + + /* + * select apll as pd_bus bus clock source and + * set up dependent divisors for PCLK/HCLK and ACLK clocks. + */ + aclk_div = GPLL_HZ / BUS_ACLK_HZ - 1; + assert((aclk_div + 1) * BUS_ACLK_HZ == GPLL_HZ && aclk_div <= 0x1f); + + pclk_div = GPLL_HZ / BUS_PCLK_HZ - 1; + assert((pclk_div + 1) * BUS_PCLK_HZ == GPLL_HZ && pclk_div <= 0x7); + + hclk_div = GPLL_HZ / BUS_HCLK_HZ - 1; + assert((hclk_div + 1) * BUS_HCLK_HZ == GPLL_HZ && hclk_div <= 0x3); + + rk_clrsetreg(&cru->cru_clksel_con[0], + BUS_ACLK_PLL_SEL_MASK | BUS_ACLK_DIV_MASK, + BUS_ACLK_PLL_SEL_GPLL << BUS_ACLK_PLL_SEL_SHIFT | + aclk_div << BUS_ACLK_DIV_SHIFT); + + rk_clrsetreg(&cru->cru_clksel_con[1], + BUS_PCLK_DIV_MASK | BUS_HCLK_DIV_MASK, + pclk_div << BUS_PCLK_DIV_SHIFT | + hclk_div << BUS_HCLK_DIV_SHIFT); + + /* + * select gpll as pd_peri bus clock source 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 < 0x8); + + rk_clrsetreg(&cru->cru_clksel_con[10], + PERI_PLL_SEL_MASK | PERI_PCLK_DIV_MASK | + PERI_HCLK_DIV_MASK | PERI_ACLK_DIV_MASK, + PERI_PLL_GPLL << PERI_PLL_SEL_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 | APLL_MODE_MASK, + GPLL_MODE_NORM << GPLL_MODE_SHIFT | + APLL_MODE_NORM << APLL_MODE_SHIFT); +} + +/* Get pll rate by id */ +static uint32_t rkclk_pll_get_rate(struct rk322x_cru *cru, + enum rk_clk_id clk_id) +{ + uint32_t refdiv, fbdiv, postdiv1, postdiv2; + uint32_t con; + int pll_id = rk_pll_id(clk_id); + struct rk322x_pll *pll = &cru->pll[pll_id]; + static u8 clk_shift[CLK_COUNT] = { + 0xff, APLL_MODE_SHIFT, DPLL_MODE_SHIFT, 0xff, + GPLL_MODE_SHIFT, 0xff + }; + static u32 clk_mask[CLK_COUNT] = { + 0xff, APLL_MODE_MASK, DPLL_MODE_MASK, 0xff, + GPLL_MODE_MASK, 0xff + }; + uint shift; + uint mask; + + con = readl(&cru->cru_mode_con); + shift = clk_shift[clk_id]; + mask = clk_mask[clk_id]; + + switch ((con & mask) >> shift) { + case GPLL_MODE_SLOW: + return OSC_HZ; + case GPLL_MODE_NORM: + + /* normal mode */ + con = readl(&pll->con0); + postdiv1 = (con & PLL_POSTDIV1_MASK) >> PLL_POSTDIV1_SHIFT; + fbdiv = (con & PLL_FBDIV_MASK) >> PLL_FBDIV_SHIFT; + con = readl(&pll->con1); + postdiv2 = (con & PLL_POSTDIV2_MASK) >> PLL_POSTDIV2_SHIFT; + refdiv = (con & PLL_REFDIV_MASK) >> PLL_REFDIV_SHIFT; + return (24 * fbdiv / (refdiv * postdiv1 * postdiv2)) * 1000000; + default: + return 32768; + } +} + +static ulong rockchip_mmc_get_clk(struct rk322x_cru *cru, uint clk_general_rate, + int periph) +{ + uint src_rate; + uint div, mux; + u32 con; + + switch (periph) { + case HCLK_EMMC: + case SCLK_EMMC: + con = readl(&cru->cru_clksel_con[11]); + mux = (con & EMMC_PLL_MASK) >> EMMC_PLL_SHIFT; + con = readl(&cru->cru_clksel_con[12]); + div = (con & EMMC_DIV_MASK) >> EMMC_DIV_SHIFT; + break; + case HCLK_SDMMC: + case SCLK_SDMMC: + con = readl(&cru->cru_clksel_con[11]); + mux = (con & MMC0_PLL_MASK) >> MMC0_PLL_SHIFT; + div = (con & MMC0_DIV_MASK) >> MMC0_DIV_SHIFT; + break; + default: + return -EINVAL; + } + + src_rate = mux == EMMC_SEL_24M ? OSC_HZ : clk_general_rate; + return DIV_TO_RATE(src_rate, div); +} + +static ulong rockchip_mmc_set_clk(struct rk322x_cru *cru, uint clk_general_rate, + int periph, uint freq) +{ + int src_clk_div; + int mux; + + debug("%s: clk_general_rate=%u\n", __func__, clk_general_rate); + + /* mmc clock auto divide 2 in internal */ + src_clk_div = (clk_general_rate / 2 + freq - 1) / freq; + + if (src_clk_div > 0x7f) { + src_clk_div = (OSC_HZ / 2 + freq - 1) / freq; + mux = EMMC_SEL_24M; + } else { + mux = EMMC_SEL_GPLL; + } + + switch (periph) { + case HCLK_EMMC: + case SCLK_EMMC: + rk_clrsetreg(&cru->cru_clksel_con[11], + EMMC_PLL_MASK, + mux << EMMC_PLL_SHIFT); + rk_clrsetreg(&cru->cru_clksel_con[12], + EMMC_DIV_MASK, + (src_clk_div - 1) << EMMC_DIV_SHIFT); + break; + case HCLK_SDMMC: + case SCLK_SDMMC: + rk_clrsetreg(&cru->cru_clksel_con[11], + MMC0_PLL_MASK | MMC0_DIV_MASK, + mux << MMC0_PLL_SHIFT | + (src_clk_div - 1) << MMC0_DIV_SHIFT); + break; + default: + return -EINVAL; + } + + return rockchip_mmc_get_clk(cru, clk_general_rate, periph); +} + +static int rk322x_ddr_set_clk(struct rk322x_cru *cru, unsigned int set_rate) +{ + struct pll_div dpll_cfg; + + /* clk_ddrc == DPLL = 24MHz / refdiv * fbdiv / postdiv1 / postdiv2 */ + switch (set_rate) { + case 400*MHz: + dpll_cfg = (struct pll_div) + {.refdiv = 1, .fbdiv = 50, .postdiv1 = 3, .postdiv2 = 1}; + break; + case 600*MHz: + dpll_cfg = (struct pll_div) + {.refdiv = 1, .fbdiv = 75, .postdiv1 = 3, .postdiv2 = 1}; + break; + case 800*MHz: + dpll_cfg = (struct pll_div) + {.refdiv = 1, .fbdiv = 100, .postdiv1 = 3, .postdiv2 = 1}; + break; + } + + /* pll enter slow-mode */ + rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK, + DPLL_MODE_SLOW << DPLL_MODE_SHIFT); + rkclk_set_pll(cru, CLK_DDR, &dpll_cfg); + /* PLL enter normal-mode */ + rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK, + DPLL_MODE_NORM << DPLL_MODE_SHIFT); + + return set_rate; +} +static ulong rk322x_clk_get_rate(struct clk *clk) +{ + struct rk322x_clk_priv *priv = dev_get_priv(clk->dev); + ulong rate, gclk_rate; + + gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL); + switch (clk->id) { + case 0 ... 63: + rate = rkclk_pll_get_rate(priv->cru, clk->id); + break; + case HCLK_EMMC: + case SCLK_EMMC: + case HCLK_SDMMC: + case SCLK_SDMMC: + rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id); + break; + default: + return -ENOENT; + } + + return rate; +} + +static ulong rk322x_clk_set_rate(struct clk *clk, ulong rate) +{ + struct rk322x_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 HCLK_EMMC: + case SCLK_EMMC: + case HCLK_SDMMC: + case SCLK_SDMMC: + new_rate = rockchip_mmc_set_clk(priv->cru, gclk_rate, + clk->id, rate); + break; + case CLK_DDR: + new_rate = rk322x_ddr_set_clk(priv->cru, rate); + break; + default: + return -ENOENT; + } + + return new_rate; +} + +static struct clk_ops rk322x_clk_ops = { + .get_rate = rk322x_clk_get_rate, + .set_rate = rk322x_clk_set_rate, +}; + +static int rk322x_clk_ofdata_to_platdata(struct udevice *dev) +{ + struct rk322x_clk_priv *priv = dev_get_priv(dev); + + priv->cru = (struct rk322x_cru *)devfdt_get_addr(dev); + + return 0; +} + +static int rk322x_clk_probe(struct udevice *dev) +{ + struct rk322x_clk_priv *priv = dev_get_priv(dev); + + rkclk_init(priv->cru); + + return 0; +} + +static int rk322x_clk_bind(struct udevice *dev) +{ + int ret; + + /* The reset driver does not have a device node, so bind it here */ + ret = device_bind_driver(gd->dm_root, "rk322x_sysreset", "reset", &dev); + if (ret) + debug("Warning: No RK3036 reset driver: ret=%d\n", ret); + + return 0; +} + +static const struct udevice_id rk322x_clk_ids[] = { + { .compatible = "rockchip,rk3228-cru" }, + { } +}; + +U_BOOT_DRIVER(rockchip_rk322x_cru) = { + .name = "clk_rk322x", + .id = UCLASS_CLK, + .of_match = rk322x_clk_ids, + .priv_auto_alloc_size = sizeof(struct rk322x_clk_priv), + .ofdata_to_platdata = rk322x_clk_ofdata_to_platdata, + .ops = &rk322x_clk_ops, + .bind = rk322x_clk_bind, + .probe = rk322x_clk_probe, +}; |