// SPDX-License-Identifier: GPL-2.0 /* * (C) Copyright 2015 Google, Inc */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include DECLARE_GLOBAL_DATA_PTR; struct rk3288_clk_plat { #if CONFIG_IS_ENABLED(OF_PLATDATA) struct dtd_rockchip_rk3288_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 = 27500000, FREF_MAX_HZ = 2200U * 1000000, FREF_MIN_HZ = 269 * 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, /* CLKSEL0 */ CORE_SEL_PLL_SHIFT = 15, CORE_SEL_PLL_MASK = 1 << CORE_SEL_PLL_SHIFT, A17_DIV_SHIFT = 8, A17_DIV_MASK = 0x1f << A17_DIV_SHIFT, MP_DIV_SHIFT = 4, MP_DIV_MASK = 0xf << MP_DIV_SHIFT, M0_DIV_SHIFT = 0, M0_DIV_MASK = 0xf << M0_DIV_SHIFT, /* 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_PCLK_DIV_SHIFT, /* 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_HCLK_DIV_SHIFT, /* 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_DIV0_SHIFT, PD_BUS_ACLK_DIV1_SHIFT = 0, PD_BUS_ACLK_DIV1_MASK = 0x7 << PD_BUS_ACLK_DIV1_SHIFT, /* * CLKSEL10 * peripheral bus pclk div: * aclk_bus: pclk_bus = 1:1 or 2:1 or 4:1 or 8:1 */ PERI_SEL_PLL_SHIFT = 15, PERI_SEL_PLL_MASK = 1 << PERI_SEL_PLL_SHIFT, PERI_SEL_CPLL = 0, PERI_SEL_GPLL, PERI_PCLK_DIV_SHIFT = 12, PERI_PCLK_DIV_MASK = 3 << PERI_PCLK_DIV_SHIFT, /* 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 << PERI_HCLK_DIV_SHIFT, /* * peripheral bus aclk div: * aclk_periph = periph_clk_src / (peri_aclk_div_con + 1) */ PERI_ACLK_DIV_SHIFT = 0, PERI_ACLK_DIV_MASK = 0x1f << PERI_ACLK_DIV_SHIFT, /* * CLKSEL24 * saradc_div_con: * clk_saradc=24MHz/(saradc_div_con+1) */ CLK_SARADC_DIV_CON_SHIFT = 8, CLK_SARADC_DIV_CON_MASK = GENMASK(15, 8), CLK_SARADC_DIV_CON_WIDTH = 8, 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 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 rockchip_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 %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 | 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 from reset */ rk_clrreg(&pll->con3, 1 << PLL_RESET_SHIFT); return 0; } static int rkclk_configure_ddr(struct rockchip_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; 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_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_NORMAL << DPLL_MODE_SHIFT); return 0; } #ifndef CONFIG_SPL_BUILD #define VCO_MAX_KHZ 2200000 #define VCO_MIN_KHZ 440000 #define FREF_MAX_KHZ 2200000 #define FREF_MIN_KHZ 269 static int pll_para_config(ulong freq_hz, struct pll_div *div, uint *ext_div) { uint ref_khz = OSC_HZ / 1000, nr, nf = 0; uint fref_khz; uint diff_khz, best_diff_khz; const uint max_nr = 1 << 6, max_nf = 1 << 12, max_no = 1 << 4; uint vco_khz; uint no = 1; uint freq_khz = freq_hz / 1000; if (!freq_hz) { printf("%s: the frequency can not be 0 Hz\n", __func__); return -EINVAL; } no = DIV_ROUND_UP(VCO_MIN_KHZ, freq_khz); if (ext_div) { *ext_div = DIV_ROUND_UP(no, max_no); no = DIV_ROUND_UP(no, *ext_div); } /* only even divisors (and 1) are supported */ if (no > 1) no = DIV_ROUND_UP(no, 2) * 2; vco_khz = freq_khz * no; if (ext_div) vco_khz *= *ext_div; if (vco_khz < VCO_MIN_KHZ || vco_khz > VCO_MAX_KHZ || no > max_no) { printf("%s: Cannot find out a supported VCO for Frequency (%luHz).\n", __func__, freq_hz); return -1; } div->no = no; best_diff_khz = vco_khz; for (nr = 1; nr < max_nr && best_diff_khz; nr++) { fref_khz = ref_khz / nr; if (fref_khz < FREF_MIN_KHZ) break; if (fref_khz > FREF_MAX_KHZ) continue; nf = vco_khz / fref_khz; if (nf >= max_nf) continue; diff_khz = vco_khz - nf * fref_khz; if (nf + 1 < max_nf && diff_khz > fref_khz / 2) { nf++; diff_khz = fref_khz - diff_khz; } if (diff_khz >= best_diff_khz) continue; best_diff_khz = diff_khz; div->nr = nr; div->nf = nf; } if (best_diff_khz > 4 * 1000) { printf("%s: Failed to match output frequency %lu, difference is %u Hz, exceed 4MHZ\n", __func__, freq_hz, best_diff_khz * 1000); return -EINVAL; } return 0; } static int rockchip_mac_set_clk(struct rockchip_cru *cru, uint freq) { ulong ret; /* * The gmac clock can be derived either from an external clock * or can be generated from internally by a divider from SCLK_MAC. */ if (readl(&cru->cru_clksel_con[21]) & RMII_EXTCLK_MASK) { /* An external clock will always generate the right rate... */ ret = freq; } else { u32 con = readl(&cru->cru_clksel_con[21]); ulong pll_rate; u8 div; if (((con >> EMAC_PLL_SHIFT) & EMAC_PLL_MASK) == EMAC_PLL_SELECT_GENERAL) pll_rate = GPLL_HZ; else if (((con >> EMAC_PLL_SHIFT) & EMAC_PLL_MASK) == EMAC_PLL_SELECT_CODEC) pll_rate = CPLL_HZ; else pll_rate = NPLL_HZ; div = DIV_ROUND_UP(pll_rate, freq) - 1; if (div <= 0x1f) rk_clrsetreg(&cru->cru_clksel_con[21], MAC_DIV_CON_MASK, div << MAC_DIV_CON_SHIFT); else debug("Unsupported div for gmac:%d\n", div); return DIV_TO_RATE(pll_rate, div); } return ret; } static int rockchip_vop_set_clk(struct rockchip_cru *cru, struct rk3288_grf *grf, int periph, unsigned int rate_hz) { struct pll_div npll_config = {0}; u32 lcdc_div; int ret; ret = pll_para_config(rate_hz, &npll_config, &lcdc_div); if (ret) return ret; rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK, NPLL_MODE_SLOW << NPLL_MODE_SHIFT); rkclk_set_pll(cru, CLK_NEW, &npll_config); /* waiting for pll lock */ while (1) { if (readl(&grf->soc_status[1]) & SOCSTS_NPLL_LOCK) break; udelay(1); } rk_clrsetreg(&cru->cru_mode_con, NPLL_MODE_MASK, NPLL_MODE_NORMAL << NPLL_MODE_SHIFT); /* vop dclk source clk: npll,dclk_div: 1 */ switch (periph) { case DCLK_VOP0: rk_clrsetreg(&cru->cru_clksel_con[27], 0xff << 8 | 3 << 0, (lcdc_div - 1) << 8 | 2 << 0); break; case DCLK_VOP1: rk_clrsetreg(&cru->cru_clksel_con[29], 0xff << 8 | 3 << 6, (lcdc_div - 1) << 8 | 2 << 6); break; } return 0; } static u32 rockchip_clk_gcd(u32 a, u32 b) { while (b != 0) { int r = b; b = a % b; a = r; } return a; } static ulong rockchip_i2s_get_clk(struct rockchip_cru *cru, uint gclk_rate) { unsigned long long rate; uint val; int n, d; val = readl(&cru->cru_clksel_con[8]); n = (val & I2S0_FRAC_NUMER_MASK) >> I2S0_FRAC_NUMER_SHIFT; d = (val & I2S0_FRAC_DENOM_MASK) >> I2S0_FRAC_DENOM_SHIFT; rate = (unsigned long long)gclk_rate * n; do_div(rate, d); return (ulong)rate; } static ulong rockchip_i2s_set_clk(struct rockchip_cru *cru, uint gclk_rate, uint freq) { int n, d; int v; /* set frac divider */ v = rockchip_clk_gcd(gclk_rate, freq); n = gclk_rate / v; d = freq / v; assert(freq == gclk_rate / n * d); writel(d << I2S0_FRAC_NUMER_SHIFT | n << I2S0_FRAC_DENOM_SHIFT, &cru->cru_clksel_con[8]); return rockchip_i2s_get_clk(cru, gclk_rate); } #endif /* CONFIG_SPL_BUILD */ static void rkclk_init(struct rockchip_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 | CPLL_MODE_MASK, 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_HCLK_DIV_MASK | PD_BUS_ACLK_DIV0_MASK | PD_BUS_ACLK_DIV1_MASK, 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 = 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_HCLK_DIV_MASK | PERI_ACLK_DIV_MASK, 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 | CPLL_MODE_MASK, GPLL_MODE_NORMAL << GPLL_MODE_SHIFT | CPLL_MODE_NORMAL << CPLL_MODE_SHIFT); } void rk3288_clk_configure_cpu(struct rockchip_cru *cru, struct rk3288_grf *grf) { /* pll enter slow-mode */ rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK, APLL_MODE_SLOW << APLL_MODE_SHIFT); rkclk_set_pll(cru, CLK_ARM, &apll_init_cfg); /* waiting for pll lock */ while (!(readl(&grf->soc_status[1]) & SOCSTS_APLL_LOCK)) udelay(1); /* * core clock pll source selection and * set up dependent divisors for MPAXI/M0AXI and ARM clocks. * core clock select apll, apll clk = 1800MHz * arm clk = 1800MHz, mpclk = 450MHz, m0clk = 900MHz */ rk_clrsetreg(&cru->cru_clksel_con[0], CORE_SEL_PLL_MASK | A17_DIV_MASK | MP_DIV_MASK | M0_DIV_MASK, 0 << A17_DIV_SHIFT | 3 << MP_DIV_SHIFT | 1 << M0_DIV_SHIFT); /* * set up dependent divisors for L2RAM/ATCLK and PCLK clocks. * l2ramclk = 900MHz, atclk = 450MHz, pclk_dbg = 450MHz */ rk_clrsetreg(&cru->cru_clksel_con[37], CLK_L2RAM_DIV_MASK | ATCLK_CORE_DIV_CON_MASK | PCLK_CORE_DBG_DIV_MASK, 1 << CLK_L2RAM_DIV_SHIFT | 3 << ATCLK_CORE_DIV_CON_SHIFT | 3 << PCLK_CORE_DBG_DIV_SHIFT); /* PLL enter normal-mode */ rk_clrsetreg(&cru->cru_mode_con, APLL_MODE_MASK, APLL_MODE_NORMAL << APLL_MODE_SHIFT); } /* Get pll rate by id */ static uint32_t rkclk_pll_get_rate(struct rockchip_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_MODE_SHIFT, DPLL_MODE_SHIFT, CPLL_MODE_SHIFT, GPLL_MODE_SHIFT, NPLL_MODE_SHIFT }; uint shift; con = readl(&cru->cru_mode_con); shift = clk_shift[clk_id]; switch ((con >> shift) & CRU_MODE_MASK) { case APLL_MODE_SLOW: return OSC_HZ; case APLL_MODE_NORMAL: /* normal mode */ con = readl(&pll->con0); no = ((con & CLKOD_MASK) >> CLKOD_SHIFT) + 1; nr = ((con & CLKR_MASK) >> CLKR_SHIFT) + 1; con = readl(&pll->con1); nf = ((con & CLKF_MASK) >> CLKF_SHIFT) + 1; return (24 * nf / (nr * no)) * 1000000; case APLL_MODE_DEEP: default: return 32768; } } static ulong rockchip_mmc_get_clk(struct rockchip_cru *cru, uint gclk_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[12]); mux = (con & EMMC_PLL_MASK) >> EMMC_PLL_SHIFT; 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; case HCLK_SDIO0: case SCLK_SDIO0: con = readl(&cru->cru_clksel_con[12]); mux = (con & SDIO0_PLL_MASK) >> SDIO0_PLL_SHIFT; div = (con & SDIO0_DIV_MASK) >> SDIO0_DIV_SHIFT; break; default: return -EINVAL; } src_rate = mux == EMMC_PLL_SELECT_24MHZ ? OSC_HZ : gclk_rate; return DIV_TO_RATE(src_rate, div); } static ulong rockchip_mmc_set_clk(struct rockchip_cru *cru, uint gclk_rate, int periph, uint freq) { int src_clk_div; int mux; debug("%s: gclk_rate=%u\n", __func__, gclk_rate); /* mmc clock default div 2 internal, need provide double in cru */ src_clk_div = DIV_ROUND_UP(gclk_rate / 2, freq); if (src_clk_div > 0x3f) { src_clk_div = DIV_ROUND_UP(OSC_HZ / 2, freq); assert(src_clk_div < 0x40); 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 HCLK_EMMC: case SCLK_EMMC: rk_clrsetreg(&cru->cru_clksel_con[12], EMMC_PLL_MASK | EMMC_DIV_MASK, mux << EMMC_PLL_SHIFT | (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; case HCLK_SDIO0: case SCLK_SDIO0: rk_clrsetreg(&cru->cru_clksel_con[12], SDIO0_PLL_MASK | SDIO0_DIV_MASK, mux << SDIO0_PLL_SHIFT | (src_clk_div - 1) << SDIO0_DIV_SHIFT); break; default: return -EINVAL; } return rockchip_mmc_get_clk(cru, gclk_rate, periph); } static ulong rockchip_spi_get_clk(struct rockchip_cru *cru, uint gclk_rate, int periph) { uint div, mux; u32 con; switch (periph) { case SCLK_SPI0: con = readl(&cru->cru_clksel_con[25]); mux = (con & SPI0_PLL_MASK) >> SPI0_PLL_SHIFT; div = (con & SPI0_DIV_MASK) >> SPI0_DIV_SHIFT; break; case SCLK_SPI1: con = readl(&cru->cru_clksel_con[25]); mux = (con & SPI1_PLL_MASK) >> SPI1_PLL_SHIFT; div = (con & SPI1_DIV_MASK) >> SPI1_DIV_SHIFT; break; case SCLK_SPI2: con = readl(&cru->cru_clksel_con[39]); mux = (con & SPI2_PLL_MASK) >> SPI2_PLL_SHIFT; div = (con & SPI2_DIV_MASK) >> SPI2_DIV_SHIFT; break; default: return -EINVAL; } assert(mux == SPI0_PLL_SELECT_GENERAL); return DIV_TO_RATE(gclk_rate, div); } static ulong rockchip_spi_set_clk(struct rockchip_cru *cru, uint gclk_rate, int periph, uint freq) { int src_clk_div; debug("%s: clk_general_rate=%u\n", __func__, gclk_rate); src_clk_div = DIV_ROUND_UP(gclk_rate, freq) - 1; assert(src_clk_div < 128); switch (periph) { case SCLK_SPI0: rk_clrsetreg(&cru->cru_clksel_con[25], SPI0_PLL_MASK | SPI0_DIV_MASK, SPI0_PLL_SELECT_GENERAL << SPI0_PLL_SHIFT | src_clk_div << SPI0_DIV_SHIFT); break; case SCLK_SPI1: rk_clrsetreg(&cru->cru_clksel_con[25], SPI1_PLL_MASK | SPI1_DIV_MASK, SPI1_PLL_SELECT_GENERAL << SPI1_PLL_SHIFT | src_clk_div << SPI1_DIV_SHIFT); break; case SCLK_SPI2: rk_clrsetreg(&cru->cru_clksel_con[39], SPI2_PLL_MASK | SPI2_DIV_MASK, SPI2_PLL_SELECT_GENERAL << SPI2_PLL_SHIFT | src_clk_div << SPI2_DIV_SHIFT); break; default: return -EINVAL; } return rockchip_spi_get_clk(cru, gclk_rate, periph); } static ulong rockchip_saradc_get_clk(struct rockchip_cru *cru) { u32 div, val; val = readl(&cru->cru_clksel_con[24]); div = bitfield_extract(val, CLK_SARADC_DIV_CON_SHIFT, CLK_SARADC_DIV_CON_WIDTH); return DIV_TO_RATE(OSC_HZ, div); } static ulong rockchip_saradc_set_clk(struct rockchip_cru *cru, uint hz) { int src_clk_div; src_clk_div = DIV_ROUND_UP(OSC_HZ, hz) - 1; assert(src_clk_div < 128); rk_clrsetreg(&cru->cru_clksel_con[24], CLK_SARADC_DIV_CON_MASK, src_clk_div << CLK_SARADC_DIV_CON_SHIFT); return rockchip_saradc_get_clk(cru); } static ulong rk3288_clk_get_rate(struct clk *clk) { struct rk3288_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 0 ... 63: new_rate = rkclk_pll_get_rate(priv->cru, clk->id); break; case HCLK_EMMC: case HCLK_SDMMC: case HCLK_SDIO0: case SCLK_EMMC: case SCLK_SDMMC: case SCLK_SDIO0: new_rate = rockchip_mmc_get_clk(priv->cru, gclk_rate, clk->id); break; case SCLK_SPI0: case SCLK_SPI1: case SCLK_SPI2: new_rate = rockchip_spi_get_clk(priv->cru, gclk_rate, clk->id); break; case PCLK_I2C0: case PCLK_I2C1: case PCLK_I2C2: case PCLK_I2C3: case PCLK_I2C4: case PCLK_I2C5: return gclk_rate; case PCLK_PWM: case PCLK_RKPWM: return PD_BUS_PCLK_HZ; case SCLK_SARADC: new_rate = rockchip_saradc_get_clk(priv->cru); break; default: return -ENOENT; } return new_rate; } static ulong rk3288_clk_set_rate(struct clk *clk, ulong rate) { struct rk3288_clk_priv *priv = dev_get_priv(clk->dev); struct rockchip_cru *cru = priv->cru; ulong new_rate, gclk_rate; gclk_rate = rkclk_pll_get_rate(priv->cru, CLK_GENERAL); switch (clk->id) { case PLL_APLL: /* We only support a fixed rate here */ if (rate != 1800000000) return -EINVAL; rk3288_clk_configure_cpu(priv->cru, priv->grf); new_rate = rate; break; case CLK_DDR: new_rate = rkclk_configure_ddr(priv->cru, priv->grf, rate); break; case HCLK_EMMC: case HCLK_SDMMC: case HCLK_SDIO0: case SCLK_EMMC: case SCLK_SDMMC: case SCLK_SDIO0: new_rate = rockchip_mmc_set_clk(cru, gclk_rate, clk->id, rate); break; case SCLK_SPI0: case SCLK_SPI1: case SCLK_SPI2: new_rate = rockchip_spi_set_clk(cru, gclk_rate, clk->id, rate); break; #ifndef CONFIG_SPL_BUILD case SCLK_I2S0: new_rate = rockchip_i2s_set_clk(cru, gclk_rate, rate); break; case SCLK_MAC: new_rate = rockchip_mac_set_clk(priv->cru, rate); break; case DCLK_VOP0: case DCLK_VOP1: new_rate = rockchip_vop_set_clk(cru, priv->grf, clk->id, rate); break; case SCLK_EDP_24M: /* clk_edp_24M source: 24M */ rk_setreg(&cru->cru_clksel_con[28], 1 << 15); /* rst edp */ rk_setreg(&cru->cru_clksel_con[6], 1 << 15); udelay(1); rk_clrreg(&cru->cru_clksel_con[6], 1 << 15); new_rate = rate; break; case ACLK_VOP0: case ACLK_VOP1: { u32 div; /* vop aclk source clk: cpll */ div = CPLL_HZ / rate; assert((div - 1 < 64) && (div * rate == CPLL_HZ)); switch (clk->id) { case ACLK_VOP0: rk_clrsetreg(&cru->cru_clksel_con[31], 3 << 6 | 0x1f << 0, 0 << 6 | (div - 1) << 0); break; case ACLK_VOP1: rk_clrsetreg(&cru->cru_clksel_con[31], 3 << 14 | 0x1f << 8, 0 << 14 | (div - 1) << 8); break; } new_rate = rate; break; } case PCLK_HDMI_CTRL: /* enable pclk hdmi ctrl */ rk_clrreg(&cru->cru_clkgate_con[16], 1 << 9); /* software reset hdmi */ rk_setreg(&cru->cru_clkgate_con[7], 1 << 9); udelay(1); rk_clrreg(&cru->cru_clkgate_con[7], 1 << 9); new_rate = rate; break; #endif case SCLK_SARADC: new_rate = rockchip_saradc_set_clk(priv->cru, rate); break; case PLL_GPLL: case PLL_CPLL: case PLL_NPLL: case ACLK_CPU: case HCLK_CPU: case PCLK_CPU: case ACLK_PERI: case HCLK_PERI: case PCLK_PERI: case SCLK_UART0: return 0; default: return -ENOENT; } return new_rate; } static int __maybe_unused rk3288_gmac_set_parent(struct clk *clk, struct clk *parent) { struct rk3288_clk_priv *priv = dev_get_priv(clk->dev); struct rockchip_cru *cru = priv->cru; const char *clock_output_name; int ret; /* * If the requested parent is in the same clock-controller and * the id is SCLK_MAC_PLL ("mac_pll_src"), switch to the internal * clock. */ if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC_PLL)) { debug("%s: switching GAMC to SCLK_MAC_PLL\n", __func__); rk_clrsetreg(&cru->cru_clksel_con[21], RMII_EXTCLK_MASK, 0); return 0; } /* * Otherwise, we need to check the clock-output-names of the * requested parent to see if the requested id is "ext_gmac". */ ret = dev_read_string_index(parent->dev, "clock-output-names", parent->id, &clock_output_name); if (ret < 0) return -ENODATA; /* If this is "ext_gmac", switch to the external clock input */ if (!strcmp(clock_output_name, "ext_gmac")) { debug("%s: switching GMAC to external clock\n", __func__); rk_clrsetreg(&cru->cru_clksel_con[21], RMII_EXTCLK_MASK, RMII_EXTCLK_SELECT_EXT_CLK << RMII_EXTCLK_SHIFT); return 0; } return -EINVAL; } static int __maybe_unused rk3288_clk_set_parent(struct clk *clk, struct clk *parent) { switch (clk->id) { case SCLK_MAC: return rk3288_gmac_set_parent(clk, parent); case SCLK_USBPHY480M_SRC: return 0; } debug("%s: unsupported clk %ld\n", __func__, clk->id); return -ENOENT; } static struct clk_ops rk3288_clk_ops = { .get_rate = rk3288_clk_get_rate, .set_rate = rk3288_clk_set_rate, #if CONFIG_IS_ENABLED(OF_REAL) .set_parent = rk3288_clk_set_parent, #endif }; static int rk3288_clk_of_to_plat(struct udevice *dev) { if (CONFIG_IS_ENABLED(OF_REAL)) { struct rk3288_clk_priv *priv = dev_get_priv(dev); priv->cru = dev_read_addr_ptr(dev); } return 0; } static int rk3288_clk_probe(struct udevice *dev) { struct rk3288_clk_priv *priv = dev_get_priv(dev); bool init_clocks = false; priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); if (IS_ERR(priv->grf)) return PTR_ERR(priv->grf); #ifdef CONFIG_SPL_BUILD #if CONFIG_IS_ENABLED(OF_PLATDATA) struct rk3288_clk_plat *plat = dev_get_plat(dev); priv->cru = map_sysmem(plat->dtd.reg[0], plat->dtd.reg[1]); #endif init_clocks = true; #endif if (!(gd->flags & GD_FLG_RELOC)) { u32 reg; /* * Init clocks in U-Boot proper if the NPLL is runnning. This * indicates that a previous boot loader set up the clocks, so * we need to redo it. U-Boot's SPL does not set this clock. */ reg = readl(&priv->cru->cru_mode_con); if (((reg & NPLL_MODE_MASK) >> NPLL_MODE_SHIFT) == NPLL_MODE_NORMAL) init_clocks = true; } if (init_clocks) rkclk_init(priv->cru, priv->grf); return 0; } static int rk3288_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 rockchip_cru, cru_glb_srst_fst_value); priv->glb_srst_snd_value = offsetof(struct rockchip_cru, cru_glb_srst_snd_value); dev_set_priv(sys_child, priv); } #if CONFIG_IS_ENABLED(RESET_ROCKCHIP) ret = offsetof(struct rockchip_cru, cru_softrst_con[0]); ret = rockchip_reset_bind(dev, ret, 12); if (ret) debug("Warning: software reset driver bind failed\n"); #endif return 0; } static const struct udevice_id rk3288_clk_ids[] = { { .compatible = "rockchip,rk3288-cru" }, { } }; U_BOOT_DRIVER(rockchip_rk3288_cru) = { .name = "rockchip_rk3288_cru", .id = UCLASS_CLK, .of_match = rk3288_clk_ids, .priv_auto = sizeof(struct rk3288_clk_priv), .plat_auto = sizeof(struct rk3288_clk_plat), .ops = &rk3288_clk_ops, .bind = rk3288_clk_bind, .of_to_plat = rk3288_clk_of_to_plat, .probe = rk3288_clk_probe, };