/* $NetBSD: meson8b_clkc.c,v 1.3.6.2 2019/09/22 12:25:25 martin Exp $ */ /*- * Copyright (c) 2019 Jared McNeill * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __KERNEL_RCSID(1, "$NetBSD: meson8b_clkc.c,v 1.3.6.2 2019/09/22 12:25:25 martin Exp $"); #include #include #include #include #include #include #include /* * The DT for amlogic,meson8b-clkc defines two reg resources. The first * is not used by this driver. */ #define MESON8B_CLKC_REG_INDEX 1 #define CBUS_REG(x) ((x) << 2) #define HHI_GCLK_MPEG0 CBUS_REG(0x50) #define HHI_GCLK_MPEG1 CBUS_REG(0x51) #define HHI_GCLK_MPEG2 CBUS_REG(0x52) #define HHI_SYS_CPU_CLK_CNTL1 CBUS_REG(0x57) #define HHI_MPEG_CLK_CNTL CBUS_REG(0x5d) #define HHI_SYS_CPU_CLK_CNTL0 CBUS_REG(0x67) #define HHI_SYS_CPU_CLK_CNTL0_CLKSEL __BIT(7) #define HHI_SYS_CPU_CLK_CNTL0_SOUTSEL __BITS(3,2) #define HHI_SYS_CPU_CLK_CNTL0_PLLSEL __BITS(1,0) #define HHI_MPLL_CNTL CBUS_REG(0xa0) #define HHI_MPLL_CNTL2 CBUS_REG(0xa1) #define HHI_MPLL_CNTL5 CBUS_REG(0xa4) #define HHI_MPLL_CNTL6 CBUS_REG(0xa5) #define HHI_MPLL_CNTL7 CBUS_REG(0xa6) #define HHI_MPLL_CNTL8 CBUS_REG(0xa7) #define HHI_MPLL_CNTL9 CBUS_REG(0xa8) #define HHI_SYS_PLL_CNTL CBUS_REG(0xc0) #define HHI_SYS_PLL_CNTL_LOCK __BIT(31) #define HHI_SYS_PLL_CNTL_OD __BITS(17,16) #define HHI_SYS_PLL_CNTL_DIV __BITS(14,9) #define HHI_SYS_PLL_CNTL_MUL __BITS(8,0) static int meson8b_clkc_match(device_t, cfdata_t, void *); static void meson8b_clkc_attach(device_t, device_t, void *); static const char * const compatible[] = { "amlogic,meson8-clkc", "amlogic,meson8b-clkc", NULL }; CFATTACH_DECL_NEW(meson8b_clkc, sizeof(struct meson_clk_softc), meson8b_clkc_match, meson8b_clkc_attach, NULL, NULL); static struct meson_clk_reset meson8b_clkc_resets[] = { MESON_CLK_RESET(MESON8B_RESET_CPU0_SOFT_RESET, HHI_SYS_CPU_CLK_CNTL0, 24), MESON_CLK_RESET(MESON8B_RESET_CPU1_SOFT_RESET, HHI_SYS_CPU_CLK_CNTL0, 25), MESON_CLK_RESET(MESON8B_RESET_CPU2_SOFT_RESET, HHI_SYS_CPU_CLK_CNTL0, 26), MESON_CLK_RESET(MESON8B_RESET_CPU3_SOFT_RESET, HHI_SYS_CPU_CLK_CNTL0, 27), }; static const char *mpeg_sel_parents[] = { "xtal", NULL, "fclk_div7", "mpll_clkout1", "mpll_clkout2", "fclk_div4", "fclk_div3", "fclk_div5" }; static const char *cpu_in_sel_parents[] = { "xtal", "sys_pll" }; static const char *cpu_scale_out_sel_parents[] = { "cpu_in_sel", "cpu_in_div2", "cpu_in_div3", "cpu_scale_div" }; static const char *cpu_clk_parents[] = { "xtal", "cpu_scale_out_sel" }; static const char *periph_clk_sel_parents[] = { "cpu_clk_div2", "cpu_clk_div3", "cpu_clk_div4", "cpu_clk_div5", "cpu_clk_div6", "cpu_clk_div7", "cpu_clk_div8" }; static int meson8b_clkc_pll_sys_set_rate(struct meson_clk_softc *sc, struct meson_clk_clk *clk, u_int rate) { struct clk *clkp, *clkp_parent; int error; KASSERT(clk->type == MESON_CLK_PLL); clkp = &clk->base; clkp_parent = clk_get_parent(clkp); if (clkp_parent == NULL) return ENXIO; const u_int old_rate = clk_get_rate(clkp); if (old_rate == rate) return 0; const u_int parent_rate = clk_get_rate(clkp_parent); if (parent_rate == 0) return EIO; CLK_LOCK(sc); uint32_t cntl0 = CLK_READ(sc, HHI_SYS_CPU_CLK_CNTL0); uint32_t cntl = CLK_READ(sc, HHI_SYS_PLL_CNTL); u_int new_mul = rate / parent_rate; u_int new_div = 1; u_int new_od = 0; if (rate < 600 * 1000000) { new_od = 2; new_mul *= 4; } else if (rate < 1200 * 1000000) { new_od = 1; new_mul *= 2; } if ((cntl0 & HHI_SYS_CPU_CLK_CNTL0_CLKSEL) == 0) { error = EIO; goto done; } if (__SHIFTOUT(cntl0, HHI_SYS_CPU_CLK_CNTL0_PLLSEL) != 1) { error = EIO; goto done; } if (__SHIFTOUT(cntl0, HHI_SYS_CPU_CLK_CNTL0_SOUTSEL) != 0) { error = EIO; goto done; } cntl &= ~HHI_SYS_PLL_CNTL_MUL; cntl |= __SHIFTIN(new_mul, HHI_SYS_PLL_CNTL_MUL); cntl &= ~HHI_SYS_PLL_CNTL_DIV; cntl |= __SHIFTIN(new_div, HHI_SYS_PLL_CNTL_DIV); cntl &= ~HHI_SYS_PLL_CNTL_OD; cntl |= __SHIFTIN(new_od, HHI_SYS_PLL_CNTL_OD); /* Switch CPU to XTAL clock */ cntl0 &= ~HHI_SYS_CPU_CLK_CNTL0_CLKSEL; CLK_WRITE(sc, HHI_SYS_CPU_CLK_CNTL0, cntl0); delay((100 * old_rate) / parent_rate); /* Update multiplier */ do { CLK_WRITE(sc, HHI_SYS_PLL_CNTL, cntl); /* Switch CPU to sys pll */ cntl0 |= HHI_SYS_CPU_CLK_CNTL0_CLKSEL; CLK_WRITE(sc, HHI_SYS_CPU_CLK_CNTL0, cntl0); } while ((CLK_READ(sc, HHI_SYS_PLL_CNTL) & HHI_SYS_PLL_CNTL_LOCK) == 0); error = 0; done: CLK_UNLOCK(sc); return error; } static struct meson_clk_clk meson8b_clkc_clks[] = { MESON_CLK_FIXED(MESON8B_CLOCK_XTAL, "xtal", 24000000), MESON_CLK_PLL_RATE(MESON8B_CLOCK_PLL_SYS_DCO, "pll_sys_dco", "xtal", MESON_CLK_PLL_REG(HHI_SYS_PLL_CNTL, __BIT(30)), /* enable */ MESON_CLK_PLL_REG(HHI_SYS_PLL_CNTL, __BITS(8,0)), /* m */ MESON_CLK_PLL_REG(HHI_SYS_PLL_CNTL, __BITS(13,9)), /* n */ MESON_CLK_PLL_REG_INVALID, /* frac */ MESON_CLK_PLL_REG(HHI_SYS_PLL_CNTL, __BIT(31)), /* l */ MESON_CLK_PLL_REG(HHI_SYS_PLL_CNTL, __BIT(29)), /* reset */ meson8b_clkc_pll_sys_set_rate, 0), MESON_CLK_DIV(MESON8B_CLOCK_PLL_SYS, "sys_pll", "pll_sys_dco", HHI_SYS_PLL_CNTL, /* reg */ __BITS(17,16), /* div */ MESON_CLK_DIV_POWER_OF_TWO | MESON_CLK_DIV_SET_RATE_PARENT), MESON_CLK_MUX(MESON8B_CLOCK_CPU_IN_SEL, "cpu_in_sel", cpu_in_sel_parents, HHI_SYS_CPU_CLK_CNTL0, /* reg */ __BIT(0), /* sel */ 0), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_CPU_IN_DIV2, "cpu_in_div2", "cpu_in_sel", 2, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_CPU_IN_DIV3, "cpu_in_div3", "cpu_in_sel", 3, 1), MESON_CLK_DIV(MESON8B_CLOCK_CPU_SCALE_DIV, "cpu_scale_div", "cpu_in_sel", HHI_SYS_CPU_CLK_CNTL1, /* reg */ __BITS(29,20), /* div */ MESON_CLK_DIV_CPU_SCALE_TABLE | MESON_CLK_DIV_SET_RATE_PARENT), MESON_CLK_MUX(MESON8B_CLOCK_CPU_SCALE_OUT_SEL, "cpu_scale_out_sel", cpu_scale_out_sel_parents, HHI_SYS_CPU_CLK_CNTL0, /* reg */ __BITS(3,2), /* sel */ 0), MESON_CLK_MUX(MESON8B_CLOCK_CPUCLK, "cpu_clk", cpu_clk_parents, HHI_SYS_CPU_CLK_CNTL0, /* reg */ __BIT(7), /* sel */ 0), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_CPU_CLK_DIV2, "cpu_clk_div2", "cpu_clk", 2, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_CPU_CLK_DIV3, "cpu_clk_div3", "cpu_clk", 3, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_CPU_CLK_DIV4, "cpu_clk_div4", "cpu_clk", 4, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_CPU_CLK_DIV5, "cpu_clk_div5", "cpu_clk", 5, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_CPU_CLK_DIV6, "cpu_clk_div6", "cpu_clk", 6, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_CPU_CLK_DIV7, "cpu_clk_div7", "cpu_clk", 7, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_CPU_CLK_DIV8, "cpu_clk_div8", "cpu_clk", 8, 1), MESON_CLK_MUX(MESON8B_CLOCK_PERIPH_SEL, "periph_clk_sel", periph_clk_sel_parents, HHI_SYS_CPU_CLK_CNTL1, /* reg */ __BITS(8,6), /* sel */ 0), MESON_CLK_GATE_FLAGS(MESON8B_CLOCK_PERIPH, "periph_clk_dis", "periph_clk_sel", HHI_SYS_CPU_CLK_CNTL1, /* reg */ 17, /* bit */ MESON_CLK_GATE_SET_TO_DISABLE), MESON_CLK_PLL(MESON8B_CLOCK_PLL_FIXED_DCO, "pll_fixed_dco", "xtal", MESON_CLK_PLL_REG(HHI_MPLL_CNTL, __BIT(30)), /* enable */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL, __BITS(8,0)), /* m */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL, __BITS(13,9)), /* n */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL2, __BITS(11,0)), /* frac */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL, __BIT(31)), /* l */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL, __BIT(29)), /* reset */ 0), MESON_CLK_DIV(MESON8B_CLOCK_PLL_FIXED, "pll_fixed", "pll_fixed_dco", HHI_MPLL_CNTL, /* reg */ __BITS(17,16), /* div */ MESON_CLK_DIV_POWER_OF_TWO), MESON_CLK_DIV(MESON8B_CLOCK_MPLL_PREDIV, "mpll_prediv", "pll_fixed", HHI_MPLL_CNTL5, /* reg */ __BIT(12), /* div */ 0), MESON_CLK_MPLL(MESON8B_CLOCK_MPLL0_DIV, "mpll0_div", "mpll_prediv", MESON_CLK_PLL_REG(HHI_MPLL_CNTL7, __BITS(13,0)), /* sdm */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL7, __BIT(15)), /* sdm_enable */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL7, __BITS(24,16)), /* n2 */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL, __BIT(25)), /* ssen */ 0), MESON_CLK_MPLL(MESON8B_CLOCK_MPLL1_DIV, "mpll1_div", "mpll_prediv", MESON_CLK_PLL_REG(HHI_MPLL_CNTL8, __BITS(13,0)), /* sdm */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL8, __BIT(15)), /* sdm_enable */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL8, __BITS(24,16)), /* n2 */ MESON_CLK_PLL_REG_INVALID, /* ssen */ 0), MESON_CLK_MPLL(MESON8B_CLOCK_MPLL2_DIV, "mpll2_div", "mpll_prediv", MESON_CLK_PLL_REG(HHI_MPLL_CNTL9, __BITS(13,0)), /* sdm */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL9, __BIT(15)), /* sdm_enable */ MESON_CLK_PLL_REG(HHI_MPLL_CNTL9, __BITS(24,16)), /* n2 */ MESON_CLK_PLL_REG_INVALID, /* ssen */ 0), MESON_CLK_GATE(MESON8B_CLOCK_MPLL0, "mpll0", "mpll0_div", HHI_MPLL_CNTL7, 14), MESON_CLK_GATE(MESON8B_CLOCK_MPLL1, "mpll1", "mpll1_div", HHI_MPLL_CNTL8, 14), MESON_CLK_GATE(MESON8B_CLOCK_MPLL2, "mpll2", "mpll2_div", HHI_MPLL_CNTL9, 14), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_FCLK_DIV2_DIV, "fclk_div2_div", "pll_fixed", 2, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_FCLK_DIV3_DIV, "fclk_div3_div", "pll_fixed", 3, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_FCLK_DIV4_DIV, "fclk_div4_div", "pll_fixed", 4, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_FCLK_DIV5_DIV, "fclk_div5_div", "pll_fixed", 5, 1), MESON_CLK_FIXED_FACTOR(MESON8B_CLOCK_FCLK_DIV7_DIV, "fclk_div7_div", "pll_fixed", 7, 1), MESON_CLK_GATE(MESON8B_CLOCK_FCLK_DIV2, "fclk_div2", "fclk_div2_div", HHI_MPLL_CNTL6, 27), MESON_CLK_GATE(MESON8B_CLOCK_FCLK_DIV3, "fclk_div3", "fclk_div3_div", HHI_MPLL_CNTL6, 28), MESON_CLK_GATE(MESON8B_CLOCK_FCLK_DIV4, "fclk_div4", "fclk_div4_div", HHI_MPLL_CNTL6, 29), MESON_CLK_GATE(MESON8B_CLOCK_FCLK_DIV5, "fclk_div5", "fclk_div5_div", HHI_MPLL_CNTL6, 30), MESON_CLK_GATE(MESON8B_CLOCK_FCLK_DIV7, "fclk_div7", "fclk_div7_div", HHI_MPLL_CNTL6, 31), MESON_CLK_MUX(MESON8B_CLOCK_MPEG_SEL, "mpeg_sel", mpeg_sel_parents, HHI_MPEG_CLK_CNTL, /* reg */ __BITS(14,12), /* sel */ 0), MESON_CLK_DIV(MESON8B_CLOCK_MPEG_DIV, "mpeg_div", "mpeg_sel", HHI_MPEG_CLK_CNTL, /* reg */ __BITS(6,0), /* div */ 0), MESON_CLK_GATE(MESON8B_CLOCK_CLK81, "clk81", "mpeg_div", HHI_MPEG_CLK_CNTL, 7), MESON_CLK_GATE(MESON8B_CLOCK_I2C, "i2c", "clk81", HHI_GCLK_MPEG0, 9), MESON_CLK_GATE(MESON8B_CLOCK_SAR_ADC, "sar_adc", "clk81", HHI_GCLK_MPEG0, 10), MESON_CLK_GATE(MESON8B_CLOCK_RNG0, "rng0", "clk81", HHI_GCLK_MPEG0, 12), MESON_CLK_GATE(MESON8B_CLOCK_UART0, "uart0", "clk81", HHI_GCLK_MPEG0, 13), MESON_CLK_GATE(MESON8B_CLOCK_SDHC, "sdhc", "clk81", HHI_GCLK_MPEG0, 14), MESON_CLK_GATE(MESON8B_CLOCK_SDIO, "sdio", "clk81", HHI_GCLK_MPEG0, 17), MESON_CLK_GATE(MESON8B_CLOCK_ETH, "eth", "clk81", HHI_GCLK_MPEG1, 3), MESON_CLK_GATE(MESON8B_CLOCK_UART1, "uart1", "clk81", HHI_GCLK_MPEG1, 16), MESON_CLK_GATE(MESON8B_CLOCK_USB0, "usb0", "clk81", HHI_GCLK_MPEG1, 21), MESON_CLK_GATE(MESON8B_CLOCK_USB1, "usb1", "clk81", HHI_GCLK_MPEG1, 22), MESON_CLK_GATE(MESON8B_CLOCK_USB, "usb", "clk81", HHI_GCLK_MPEG1, 26), MESON_CLK_GATE(MESON8B_CLOCK_EFUSE, "efuse", "clk81", HHI_GCLK_MPEG1, 30), MESON_CLK_GATE(MESON8B_CLOCK_USB1_DDR_BRIDGE, "usb1_ddr_bridge", "clk81", HHI_GCLK_MPEG2, 8), MESON_CLK_GATE(MESON8B_CLOCK_USB0_DDR_BRIDGE, "usb0_ddr_bridge", "clk81", HHI_GCLK_MPEG2, 9), MESON_CLK_GATE(MESON8B_CLOCK_UART2, "uart2", "clk81", HHI_GCLK_MPEG2, 15), }; static int meson8b_clkc_match(device_t parent, cfdata_t cf, void *aux) { struct fdt_attach_args * const faa = aux; return of_match_compatible(faa->faa_phandle, compatible); } static void meson8b_clkc_attach(device_t parent, device_t self, void *aux) { struct meson_clk_softc * const sc = device_private(self); struct fdt_attach_args * const faa = aux; sc->sc_dev = self; sc->sc_phandle = faa->faa_phandle; sc->sc_syscon = fdtbus_syscon_lookup(OF_parent(sc->sc_phandle)); if (sc->sc_syscon == NULL) { aprint_error(": couldn't get syscon registers\n"); return; } sc->sc_resets = meson8b_clkc_resets; sc->sc_nresets = __arraycount(meson8b_clkc_resets); sc->sc_clks = meson8b_clkc_clks; sc->sc_nclks = __arraycount(meson8b_clkc_clks); meson_clk_attach(sc); aprint_naive("\n"); aprint_normal(": Meson8b clock controller\n"); meson_clk_print(sc); }