/* * (C) Copyright 2015 Google, Inc * * SPDX-License-Identifier: GPL-2.0 */ #include #include #include #include #include #include #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; struct rk3288_clk_plat { enum rk_clk_id clk_id; }; struct rk3288_clk_priv { struct rk3288_grf *grf; struct rk3288_cru *cru; ulong rate; }; 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 = 27500000, FREF_MAX_HZ = 2200U * 1000000, FREF_MIN_HZ = 269 * 1000000, }; 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, /* CLKSEL1: pd bus clk pll sel: codec or general */ PD_BUS_SEL_PLL_MASK = 15, PD_BUS_SEL_CPLL = 0, PD_BUS_SEL_GPLL, /* pd bus pclk div: pclk = pd_bus_aclk /(div + 1) */ PD_BUS_PCLK_DIV_SHIFT = 12, PD_BUS_PCLK_DIV_MASK = 7, /* pd bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */ PD_BUS_HCLK_DIV_SHIFT = 8, PD_BUS_HCLK_DIV_MASK = 3, /* pd bus aclk div: pd_bus_aclk = pd_bus_src_clk /(div0 * div1) */ PD_BUS_ACLK_DIV0_SHIFT = 3, PD_BUS_ACLK_DIV0_MASK = 0x1f, PD_BUS_ACLK_DIV1_SHIFT = 0, PD_BUS_ACLK_DIV1_MASK = 0x7, /* * CLKSEL10 * peripheral bus pclk div: * aclk_bus: pclk_bus = 1:1 or 2:1 or 4:1 or 8:1 */ PERI_PCLK_DIV_SHIFT = 12, PERI_PCLK_DIV_MASK = 7, /* peripheral bus hclk div: aclk_bus: hclk_bus = 1:1 or 2:1 or 4:1 */ PERI_HCLK_DIV_SHIFT = 8, PERI_HCLK_DIV_MASK = 3, /* * peripheral bus aclk div: * aclk_periph = periph_clk_src / (peri_aclk_div_con + 1) */ PERI_ACLK_DIV_SHIFT = 0, PERI_ACLK_DIV_MASK = 0x1f, /* CLKSEL37 */ DPLL_MODE_MASK = 0x3, DPLL_MODE_SHIFT = 4, DPLL_MODE_SLOW = 0, DPLL_MODE_NORM, CPLL_MODE_MASK = 3, CPLL_MODE_SHIFT = 8, CPLL_MODE_SLOW = 0, CPLL_MODE_NORM, GPLL_MODE_MASK = 3, GPLL_MODE_SHIFT = 12, GPLL_MODE_SLOW = 0, GPLL_MODE_NORM, NPLL_MODE_MASK = 3, NPLL_MODE_SHIFT = 14, NPLL_MODE_SLOW = 0, NPLL_MODE_NORM, SOCSTS_DPLL_LOCK = 1 << 5, SOCSTS_APLL_LOCK = 1 << 6, SOCSTS_CPLL_LOCK = 1 << 7, SOCSTS_GPLL_LOCK = 1 << 8, SOCSTS_NPLL_LOCK = 1 << 9, }; #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, _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 */ static const struct pll_div apll_init_cfg = PLL_DIVISORS(APLL_HZ, 1, 1); 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); static int rkclk_set_pll(struct rk3288_cru *cru, enum rk_clk_id clk_id, const struct pll_div *div) { int pll_id = rk_pll_id(clk_id); struct rk3288_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 %p: nf=%d, nr=%d, no=%d, vco=%u Hz, output=%u Hz\n", 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 rest */ 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); rk_clrsetreg(&pll->con2, PLL_BWADJ_MASK, (div->nf >> 1) - 1); udelay(10); /* return form rest */ rk_clrreg(&pll->con3, 1 << PLL_RESET_SHIFT); return 0; } static inline unsigned int log2(unsigned int value) { return fls(value) - 1; } static int rkclk_configure_ddr(struct rk3288_cru *cru, struct rk3288_grf *grf, unsigned int hz) { static const struct pll_div dpll_cfg[] = { {.nf = 25, .nr = 2, .no = 1}, {.nf = 400, .nr = 9, .no = 2}, {.nf = 500, .nr = 9, .no = 2}, {.nf = 100, .nr = 3, .no = 1}, }; int cfg; debug("%s: cru=%p, grf=%p, hz=%u\n", __func__, cru, grf, hz); 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, add to clock.c!"); 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]); /* wait for pll lock */ while (!(readl(&grf->soc_status[1]) & SOCSTS_DPLL_LOCK)) udelay(1); /* PLL enter normal-mode */ rk_clrsetreg(&cru->cru_mode_con, DPLL_MODE_MASK << DPLL_MODE_SHIFT, DPLL_MODE_NORM << DPLL_MODE_SHIFT); return 0; } #ifdef CONFIG_SPL_BUILD static void rkclk_init(struct rk3288_cru *cru, struct rk3288_grf *grf) { u32 aclk_div; u32 hclk_div; u32 pclk_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); rkclk_set_pll(cru, CLK_CODEC, &cpll_init_cfg); /* waiting for pll lock */ while ((readl(&grf->soc_status[1]) & (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) != (SOCSTS_CPLL_LOCK | SOCSTS_GPLL_LOCK)) udelay(1); /* * pd_bus clock pll source selection and * set up dependent divisors for PCLK/HCLK and ACLK clocks. */ aclk_div = GPLL_HZ / PD_BUS_ACLK_HZ - 1; assert((aclk_div + 1) * PD_BUS_ACLK_HZ == GPLL_HZ && aclk_div < 0x1f); hclk_div = PD_BUS_ACLK_HZ / PD_BUS_HCLK_HZ - 1; assert((hclk_div + 1) * PD_BUS_HCLK_HZ == PD_BUS_ACLK_HZ && (hclk_div < 0x4) && (hclk_div != 0x2)); pclk_div = PD_BUS_ACLK_HZ / PD_BUS_PCLK_HZ - 1; assert((pclk_div + 1) * PD_BUS_PCLK_HZ == PD_BUS_ACLK_HZ && pclk_div < 0x7); rk_clrsetreg(&cru->cru_clksel_con[1], PD_BUS_PCLK_DIV_MASK << PD_BUS_PCLK_DIV_SHIFT | PD_BUS_HCLK_DIV_MASK << PD_BUS_HCLK_DIV_SHIFT | PD_BUS_ACLK_DIV0_MASK << PD_BUS_ACLK_DIV0_SHIFT | PD_BUS_ACLK_DIV1_MASK << PD_BUS_ACLK_DIV1_SHIFT, pclk_div << PD_BUS_PCLK_DIV_SHIFT | hclk_div << PD_BUS_HCLK_DIV_SHIFT | aclk_div << PD_BUS_ACLK_DIV0_SHIFT | 0 << 0); /* * 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 = log2(PERI_ACLK_HZ / PERI_HCLK_HZ); assert((1 << hclk_div) * PERI_HCLK_HZ == PERI_ACLK_HZ && (hclk_div < 0x4)); pclk_div = log2(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, 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_NORM << GPLL_MODE_SHIFT | GPLL_MODE_NORM << CPLL_MODE_SHIFT); } #endif /* Get pll rate by id */ static uint32_t rkclk_pll_get_rate(struct rk3288_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 rk3288_pll *pll = &cru->pll[pll_id]; static u8 clk_shift[CLK_COUNT] = { 0xff, APLL_WORK_SHIFT, DPLL_WORK_SHIFT, CPLL_WORK_SHIFT, GPLL_WORK_SHIFT, NPLL_WORK_SHIFT }; uint shift; con = readl(&cru->cru_mode_con); shift = clk_shift[clk_id]; switch ((con >> shift) & APLL_WORK_MASK) { case APLL_WORK_SLOW: return OSC_HZ; case APLL_WORK_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_WORK_DEEP: default: return 32768; } } static ulong rk3288_clk_get_rate(struct udevice *dev) { struct rk3288_clk_plat *plat = dev_get_platdata(dev); struct rk3288_clk_priv *priv = dev_get_priv(dev); debug("%s\n", dev->name); return rkclk_pll_get_rate(priv->cru, plat->clk_id); } static ulong rk3288_clk_set_rate(struct udevice *dev, ulong rate) { struct rk3288_clk_plat *plat = dev_get_platdata(dev); struct rk3288_clk_priv *priv = dev_get_priv(dev); debug("%s\n", dev->name); switch (plat->clk_id) { case CLK_DDR: rkclk_configure_ddr(priv->cru, priv->grf, rate); break; default: return -ENOENT; } return 0; } static ulong rockchip_mmc_get_clk(struct rk3288_cru *cru, uint clk_general_rate, enum periph_id periph) { uint src_rate; uint div, mux; u32 con; switch (periph) { case PERIPH_ID_EMMC: con = readl(&cru->cru_clksel_con[12]); mux = (con >> EMMC_PLL_SHIFT) & EMMC_PLL_MASK; div = (con >> EMMC_DIV_SHIFT) & EMMC_DIV_MASK; break; case PERIPH_ID_SDCARD: con = readl(&cru->cru_clksel_con[12]); mux = (con >> MMC0_PLL_SHIFT) & MMC0_PLL_MASK; div = (con >> MMC0_DIV_SHIFT) & MMC0_DIV_MASK; break; case PERIPH_ID_SDMMC2: con = readl(&cru->cru_clksel_con[12]); mux = (con >> SDIO0_PLL_SHIFT) & SDIO0_PLL_MASK; div = (con >> SDIO0_DIV_SHIFT) & SDIO0_DIV_MASK; break; default: return -EINVAL; } src_rate = mux == EMMC_PLL_SELECT_24MHZ ? OSC_HZ : clk_general_rate; return DIV_TO_RATE(src_rate, div); } static ulong rockchip_mmc_set_clk(struct rk3288_cru *cru, uint clk_general_rate, enum periph_id periph, uint freq) { int src_clk_div; int mux; debug("%s: clk_general_rate=%u\n", __func__, clk_general_rate); src_clk_div = RATE_TO_DIV(clk_general_rate, freq); if (src_clk_div > 0x3f) { src_clk_div = RATE_TO_DIV(OSC_HZ, freq); mux = EMMC_PLL_SELECT_24MHZ; assert((int)EMMC_PLL_SELECT_24MHZ == (int)MMC0_PLL_SELECT_24MHZ); } else { mux = EMMC_PLL_SELECT_GENERAL; assert((int)EMMC_PLL_SELECT_GENERAL == (int)MMC0_PLL_SELECT_GENERAL); } switch (periph) { case PERIPH_ID_EMMC: rk_clrsetreg(&cru->cru_clksel_con[12], EMMC_PLL_MASK << EMMC_PLL_SHIFT | EMMC_DIV_MASK << EMMC_DIV_SHIFT, mux << EMMC_PLL_SHIFT | (src_clk_div - 1) << EMMC_DIV_SHIFT); break; case PERIPH_ID_SDCARD: rk_clrsetreg(&cru->cru_clksel_con[11], MMC0_PLL_MASK << MMC0_PLL_SHIFT | MMC0_DIV_MASK << MMC0_DIV_SHIFT, mux << MMC0_PLL_SHIFT | (src_clk_div - 1) << MMC0_DIV_SHIFT); break; case PERIPH_ID_SDMMC2: rk_clrsetreg(&cru->cru_clksel_con[12], SDIO0_PLL_MASK << SDIO0_PLL_SHIFT | SDIO0_DIV_MASK << SDIO0_DIV_SHIFT, mux << SDIO0_PLL_SHIFT | (src_clk_div - 1) << SDIO0_DIV_SHIFT); break; default: return -EINVAL; } return rockchip_mmc_get_clk(cru, clk_general_rate, periph); } static ulong rockchip_spi_get_clk(struct rk3288_cru *cru, uint clk_general_rate, enum periph_id periph) { uint div, mux; u32 con; switch (periph) { case PERIPH_ID_SPI0: con = readl(&cru->cru_clksel_con[25]); mux = (con >> SPI0_PLL_SHIFT) & SPI0_PLL_MASK; div = (con >> SPI0_DIV_SHIFT) & SPI0_DIV_MASK; break; case PERIPH_ID_SPI1: con = readl(&cru->cru_clksel_con[25]); mux = (con >> SPI1_PLL_SHIFT) & SPI1_PLL_MASK; div = (con >> SPI1_DIV_SHIFT) & SPI1_DIV_MASK; break; case PERIPH_ID_SPI2: con = readl(&cru->cru_clksel_con[39]); mux = (con >> SPI2_PLL_SHIFT) & SPI2_PLL_MASK; div = (con >> SPI2_DIV_SHIFT) & SPI2_DIV_MASK; break; default: return -EINVAL; } assert(mux == SPI0_PLL_SELECT_GENERAL); return DIV_TO_RATE(clk_general_rate, div); } static ulong rockchip_spi_set_clk(struct rk3288_cru *cru, uint clk_general_rate, enum periph_id periph, uint freq) { int src_clk_div; debug("%s: clk_general_rate=%u\n", __func__, clk_general_rate); src_clk_div = RATE_TO_DIV(clk_general_rate, freq); switch (periph) { case PERIPH_ID_SPI0: rk_clrsetreg(&cru->cru_clksel_con[25], SPI0_PLL_MASK << SPI0_PLL_SHIFT | SPI0_DIV_MASK << SPI0_DIV_SHIFT, SPI0_PLL_SELECT_GENERAL << SPI0_PLL_SHIFT | src_clk_div << SPI0_DIV_SHIFT); break; case PERIPH_ID_SPI1: rk_clrsetreg(&cru->cru_clksel_con[25], SPI1_PLL_MASK << SPI1_PLL_SHIFT | SPI1_DIV_MASK << SPI1_DIV_SHIFT, SPI1_PLL_SELECT_GENERAL << SPI1_PLL_SHIFT | src_clk_div << SPI1_DIV_SHIFT); break; case PERIPH_ID_SPI2: rk_clrsetreg(&cru->cru_clksel_con[39], SPI2_PLL_MASK << SPI2_PLL_SHIFT | SPI2_DIV_MASK << SPI2_DIV_SHIFT, SPI2_PLL_SELECT_GENERAL << SPI2_PLL_SHIFT | src_clk_div << SPI2_DIV_SHIFT); break; default: return -EINVAL; } return rockchip_spi_get_clk(cru, clk_general_rate, periph); } ulong rk3288_set_periph_rate(struct udevice *dev, int periph, ulong rate) { struct rk3288_clk_priv *priv = dev_get_priv(dev); ulong new_rate; switch (periph) { case PERIPH_ID_EMMC: case PERIPH_ID_SDCARD: new_rate = rockchip_mmc_set_clk(priv->cru, clk_get_rate(dev), periph, rate); break; case PERIPH_ID_SPI0: case PERIPH_ID_SPI1: case PERIPH_ID_SPI2: new_rate = rockchip_spi_set_clk(priv->cru, clk_get_rate(dev), periph, rate); break; default: return -ENOENT; } return new_rate; } static struct clk_ops rk3288_clk_ops = { .get_rate = rk3288_clk_get_rate, .set_rate = rk3288_clk_set_rate, .set_periph_rate = rk3288_set_periph_rate, }; static int rk3288_clk_probe(struct udevice *dev) { struct rk3288_clk_plat *plat = dev_get_platdata(dev); struct rk3288_clk_priv *priv = dev_get_priv(dev); if (plat->clk_id != CLK_OSC) { struct rk3288_clk_priv *parent_priv = dev_get_priv(dev->parent); priv->cru = parent_priv->cru; priv->grf = parent_priv->grf; return 0; } priv->cru = (struct rk3288_cru *)dev_get_addr(dev); priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); #ifdef CONFIG_SPL_BUILD rkclk_init(priv->cru, priv->grf); #endif return 0; } static const char *const clk_name[CLK_COUNT] = { "osc", "apll", "dpll", "cpll", "gpll", "mpll", }; static int rk3288_clk_bind(struct udevice *dev) { struct rk3288_clk_plat *plat = dev_get_platdata(dev); int pll, ret; /* We only need to set up the root clock */ if (dev->of_offset == -1) { plat->clk_id = CLK_OSC; return 0; } /* Create devices for P main clocks */ for (pll = 1; pll < CLK_COUNT; pll++) { struct udevice *child; struct rk3288_clk_plat *cplat; debug("%s %s\n", __func__, clk_name[pll]); ret = device_bind_driver(dev, "clk_rk3288", clk_name[pll], &child); if (ret) return ret; cplat = dev_get_platdata(child); cplat->clk_id = pll; } /* The reset driver does not have a device node, so bind it here */ ret = device_bind_driver(gd->dm_root, "rk3288_reset", "reset", &dev); if (ret) debug("Warning: No RK3288 reset driver: ret=%d\n", ret); return 0; } static const struct udevice_id rk3288_clk_ids[] = { { .compatible = "rockchip,rk3288-cru" }, { } }; U_BOOT_DRIVER(clk_rk3288) = { .name = "clk_rk3288", .id = UCLASS_CLK, .of_match = rk3288_clk_ids, .priv_auto_alloc_size = sizeof(struct rk3288_clk_priv), .platdata_auto_alloc_size = sizeof(struct rk3288_clk_plat), .ops = &rk3288_clk_ops, .bind = rk3288_clk_bind, .probe = rk3288_clk_probe, };