/* * Copyright (c) 2011 The Chromium OS Authors. * (C) Copyright 2010-2015 * NVIDIA Corporation * * SPDX-License-Identifier: GPL-2.0+ */ /* Tegra20 Clock control functions */ #include #include #include #include #include #include #include #include #include /* * Clock types that we can use as a source. The Tegra20 has muxes for the * peripheral clocks, and in most cases there are four options for the clock * source. This gives us a clock 'type' and exploits what commonality exists * in the device. * * Letters are obvious, except for T which means CLK_M, and S which means the * clock derived from 32KHz. Beware that CLK_M (also called OSC in the * datasheet) and PLL_M are different things. The former is the basic * clock supplied to the SOC from an external oscillator. The latter is the * memory clock PLL. * * See definitions in clock_id in the header file. */ enum clock_type_id { CLOCK_TYPE_AXPT, /* PLL_A, PLL_X, PLL_P, CLK_M */ CLOCK_TYPE_MCPA, /* and so on */ CLOCK_TYPE_MCPT, CLOCK_TYPE_PCM, CLOCK_TYPE_PCMT, CLOCK_TYPE_PCMT16, /* CLOCK_TYPE_PCMT with 16-bit divider */ CLOCK_TYPE_PCXTS, CLOCK_TYPE_PDCT, CLOCK_TYPE_COUNT, CLOCK_TYPE_NONE = -1, /* invalid clock type */ }; enum { CLOCK_MAX_MUX = 4 /* number of source options for each clock */ }; /* * Clock source mux for each clock type. This just converts our enum into * a list of mux sources for use by the code. Note that CLOCK_TYPE_PCXTS * is special as it has 5 sources. Since it also has a different number of * bits in its register for the source, we just handle it with a special * case in the code. */ #define CLK(x) CLOCK_ID_ ## x static enum clock_id clock_source[CLOCK_TYPE_COUNT][CLOCK_MAX_MUX] = { { CLK(AUDIO), CLK(XCPU), CLK(PERIPH), CLK(OSC) }, { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(AUDIO) }, { CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(OSC) }, { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(NONE) }, { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC) }, { CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC) }, { CLK(PERIPH), CLK(CGENERAL), CLK(XCPU), CLK(OSC) }, { CLK(PERIPH), CLK(DISPLAY), CLK(CGENERAL), CLK(OSC) }, }; /* * Clock peripheral IDs which sadly don't match up with PERIPH_ID. This is * not in the header file since it is for purely internal use - we want * callers to use the PERIPH_ID for all access to peripheral clocks to avoid * confusion bewteen PERIPH_ID_... and PERIPHC_... * * We don't call this CLOCK_PERIPH_ID or PERIPH_CLOCK_ID as it would just be * confusing. * * Note to SOC vendors: perhaps define a unified numbering for peripherals and * use it for reset, clock enable, clock source/divider and even pinmuxing * if you can. */ enum periphc_internal_id { /* 0x00 */ PERIPHC_I2S1, PERIPHC_I2S2, PERIPHC_SPDIF_OUT, PERIPHC_SPDIF_IN, PERIPHC_PWM, PERIPHC_SPI1, PERIPHC_SPI2, PERIPHC_SPI3, /* 0x08 */ PERIPHC_XIO, PERIPHC_I2C1, PERIPHC_DVC_I2C, PERIPHC_TWC, PERIPHC_0c, PERIPHC_10, /* PERIPHC_SPI1, what is this really? */ PERIPHC_DISP1, PERIPHC_DISP2, /* 0x10 */ PERIPHC_CVE, PERIPHC_IDE0, PERIPHC_VI, PERIPHC_1c, PERIPHC_SDMMC1, PERIPHC_SDMMC2, PERIPHC_G3D, PERIPHC_G2D, /* 0x18 */ PERIPHC_NDFLASH, PERIPHC_SDMMC4, PERIPHC_VFIR, PERIPHC_EPP, PERIPHC_MPE, PERIPHC_MIPI, PERIPHC_UART1, PERIPHC_UART2, /* 0x20 */ PERIPHC_HOST1X, PERIPHC_21, PERIPHC_TVO, PERIPHC_HDMI, PERIPHC_24, PERIPHC_TVDAC, PERIPHC_I2C2, PERIPHC_EMC, /* 0x28 */ PERIPHC_UART3, PERIPHC_29, PERIPHC_VI_SENSOR, PERIPHC_2b, PERIPHC_2c, PERIPHC_SPI4, PERIPHC_I2C3, PERIPHC_SDMMC3, /* 0x30 */ PERIPHC_UART4, PERIPHC_UART5, PERIPHC_VDE, PERIPHC_OWR, PERIPHC_NOR, PERIPHC_CSITE, PERIPHC_COUNT, PERIPHC_NONE = -1, }; /* * Clock type for each peripheral clock source. We put the name in each * record just so it is easy to match things up */ #define TYPE(name, type) type static enum clock_type_id clock_periph_type[PERIPHC_COUNT] = { /* 0x00 */ TYPE(PERIPHC_I2S1, CLOCK_TYPE_AXPT), TYPE(PERIPHC_I2S2, CLOCK_TYPE_AXPT), TYPE(PERIPHC_SPDIF_OUT, CLOCK_TYPE_AXPT), TYPE(PERIPHC_SPDIF_IN, CLOCK_TYPE_PCM), TYPE(PERIPHC_PWM, CLOCK_TYPE_PCXTS), TYPE(PERIPHC_SPI1, CLOCK_TYPE_PCMT), TYPE(PERIPHC_SPI22, CLOCK_TYPE_PCMT), TYPE(PERIPHC_SPI3, CLOCK_TYPE_PCMT), /* 0x08 */ TYPE(PERIPHC_XIO, CLOCK_TYPE_PCMT), TYPE(PERIPHC_I2C1, CLOCK_TYPE_PCMT16), TYPE(PERIPHC_DVC_I2C, CLOCK_TYPE_PCMT16), TYPE(PERIPHC_TWC, CLOCK_TYPE_PCMT), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_SPI1, CLOCK_TYPE_PCMT), TYPE(PERIPHC_DISP1, CLOCK_TYPE_PDCT), TYPE(PERIPHC_DISP2, CLOCK_TYPE_PDCT), /* 0x10 */ TYPE(PERIPHC_CVE, CLOCK_TYPE_PDCT), TYPE(PERIPHC_IDE0, CLOCK_TYPE_PCMT), TYPE(PERIPHC_VI, CLOCK_TYPE_MCPA), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_SDMMC1, CLOCK_TYPE_PCMT), TYPE(PERIPHC_SDMMC2, CLOCK_TYPE_PCMT), TYPE(PERIPHC_G3D, CLOCK_TYPE_MCPA), TYPE(PERIPHC_G2D, CLOCK_TYPE_MCPA), /* 0x18 */ TYPE(PERIPHC_NDFLASH, CLOCK_TYPE_PCMT), TYPE(PERIPHC_SDMMC4, CLOCK_TYPE_PCMT), TYPE(PERIPHC_VFIR, CLOCK_TYPE_PCMT), TYPE(PERIPHC_EPP, CLOCK_TYPE_MCPA), TYPE(PERIPHC_MPE, CLOCK_TYPE_MCPA), TYPE(PERIPHC_MIPI, CLOCK_TYPE_PCMT), TYPE(PERIPHC_UART1, CLOCK_TYPE_PCMT), TYPE(PERIPHC_UART2, CLOCK_TYPE_PCMT), /* 0x20 */ TYPE(PERIPHC_HOST1X, CLOCK_TYPE_MCPA), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_TVO, CLOCK_TYPE_PDCT), TYPE(PERIPHC_HDMI, CLOCK_TYPE_PDCT), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_TVDAC, CLOCK_TYPE_PDCT), TYPE(PERIPHC_I2C2, CLOCK_TYPE_PCMT16), TYPE(PERIPHC_EMC, CLOCK_TYPE_MCPT), /* 0x28 */ TYPE(PERIPHC_UART3, CLOCK_TYPE_PCMT), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_VI, CLOCK_TYPE_MCPA), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE), TYPE(PERIPHC_SPI4, CLOCK_TYPE_PCMT), TYPE(PERIPHC_I2C3, CLOCK_TYPE_PCMT16), TYPE(PERIPHC_SDMMC3, CLOCK_TYPE_PCMT), /* 0x30 */ TYPE(PERIPHC_UART4, CLOCK_TYPE_PCMT), TYPE(PERIPHC_UART5, CLOCK_TYPE_PCMT), TYPE(PERIPHC_VDE, CLOCK_TYPE_PCMT), TYPE(PERIPHC_OWR, CLOCK_TYPE_PCMT), TYPE(PERIPHC_NOR, CLOCK_TYPE_PCMT), TYPE(PERIPHC_CSITE, CLOCK_TYPE_PCMT), }; /* * This array translates a periph_id to a periphc_internal_id * * Not present/matched up: * uint vi_sensor; _VI_SENSOR_0, 0x1A8 * SPDIF - which is both 0x08 and 0x0c * */ #define NONE(name) (-1) #define OFFSET(name, value) PERIPHC_ ## name static s8 periph_id_to_internal_id[PERIPH_ID_COUNT] = { /* Low word: 31:0 */ NONE(CPU), NONE(RESERVED1), NONE(RESERVED2), NONE(AC97), NONE(RTC), NONE(TMR), PERIPHC_UART1, PERIPHC_UART2, /* and vfir 0x68 */ /* 0x08 */ NONE(GPIO), PERIPHC_SDMMC2, NONE(SPDIF), /* 0x08 and 0x0c, unclear which to use */ PERIPHC_I2S1, PERIPHC_I2C1, PERIPHC_NDFLASH, PERIPHC_SDMMC1, PERIPHC_SDMMC4, /* 0x10 */ PERIPHC_TWC, PERIPHC_PWM, PERIPHC_I2S2, PERIPHC_EPP, PERIPHC_VI, PERIPHC_G2D, NONE(USBD), NONE(ISP), /* 0x18 */ PERIPHC_G3D, PERIPHC_IDE0, PERIPHC_DISP2, PERIPHC_DISP1, PERIPHC_HOST1X, NONE(VCP), NONE(RESERVED30), NONE(CACHE2), /* Middle word: 63:32 */ NONE(MEM), NONE(AHBDMA), NONE(APBDMA), NONE(RESERVED35), NONE(KBC), NONE(STAT_MON), NONE(PMC), NONE(FUSE), /* 0x28 */ NONE(KFUSE), NONE(SBC1), /* SBC1, 0x34, is this SPI1? */ PERIPHC_NOR, PERIPHC_SPI1, PERIPHC_SPI2, PERIPHC_XIO, PERIPHC_SPI3, PERIPHC_DVC_I2C, /* 0x30 */ NONE(DSI), PERIPHC_TVO, /* also CVE 0x40 */ PERIPHC_MIPI, PERIPHC_HDMI, PERIPHC_CSITE, PERIPHC_TVDAC, PERIPHC_I2C2, PERIPHC_UART3, /* 0x38 */ NONE(RESERVED56), PERIPHC_EMC, NONE(USB2), NONE(USB3), PERIPHC_MPE, PERIPHC_VDE, NONE(BSEA), NONE(BSEV), /* Upper word 95:64 */ NONE(SPEEDO), PERIPHC_UART4, PERIPHC_UART5, PERIPHC_I2C3, PERIPHC_SPI4, PERIPHC_SDMMC3, NONE(PCIE), PERIPHC_OWR, /* 0x48 */ NONE(AFI), NONE(CORESIGHT), NONE(PCIEXCLK), NONE(AVPUCQ), NONE(RESERVED76), NONE(RESERVED77), NONE(RESERVED78), NONE(RESERVED79), /* 0x50 */ NONE(RESERVED80), NONE(RESERVED81), NONE(RESERVED82), NONE(RESERVED83), NONE(IRAMA), NONE(IRAMB), NONE(IRAMC), NONE(IRAMD), /* 0x58 */ NONE(CRAM2), }; /* * PLL divider shift/mask tables for all PLL IDs. */ struct clk_pll_info tegra_pll_info_table[CLOCK_ID_PLL_COUNT] = { /* * T20 and T25 * NOTE: If kcp_mask/kvco_mask == 0, they're not used in that PLL (PLLX, etc.) * If lock_ena or lock_det are >31, they're not used in that PLL. */ { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x0F, .lock_ena = 24, .lock_det = 27, .kcp_shift = 28, .kcp_mask = 3, .kvco_shift = 27, .kvco_mask = 1 }, /* PLLC */ { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 0, .p_mask = 0, .lock_ena = 0, .lock_det = 27, .kcp_shift = 1, .kcp_mask = 3, .kvco_shift = 0, .kvco_mask = 1 }, /* PLLM */ { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07, .lock_ena = 18, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLP */ { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07, .lock_ena = 18, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLA */ { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x01, .lock_ena = 22, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLU */ { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07, .lock_ena = 22, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLD */ { .m_shift = 0, .m_mask = 0x1F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x0F, .lock_ena = 18, .lock_det = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 0, .kvco_mask = 0 }, /* PLLX */ { .m_shift = 0, .m_mask = 0xFF, .n_shift = 8, .n_mask = 0xFF, .p_shift = 0, .p_mask = 0, .lock_ena = 9, .lock_det = 11, .kcp_shift = 6, .kcp_mask = 3, .kvco_shift = 0, .kvco_mask = 1 }, /* PLLE */ { .m_shift = 0, .m_mask = 0x0F, .n_shift = 8, .n_mask = 0x3FF, .p_shift = 20, .p_mask = 0x07, .lock_ena = 18, .lock_det = 0, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLS */ }; /* * Get the oscillator frequency, from the corresponding hardware configuration * field. T20 has 4 frequencies that it supports. */ enum clock_osc_freq clock_get_osc_freq(void) { struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; u32 reg; reg = readl(&clkrst->crc_osc_ctrl); return (reg & OSC_FREQ_MASK) >> OSC_FREQ_SHIFT; } /* Returns a pointer to the clock source register for a peripheral */ u32 *get_periph_source_reg(enum periph_id periph_id) { struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; enum periphc_internal_id internal_id; assert(clock_periph_id_isvalid(periph_id)); internal_id = periph_id_to_internal_id[periph_id]; assert(internal_id != -1); return &clkrst->crc_clk_src[internal_id]; } /** * Given a peripheral ID and the required source clock, this returns which * value should be programmed into the source mux for that peripheral. * * There is special code here to handle the one source type with 5 sources. * * @param periph_id peripheral to start * @param source PLL id of required parent clock * @param mux_bits Set to number of bits in mux register: 2 or 4 * @param divider_bits Set to number of divider bits (8 or 16) * @return mux value (0-4, or -1 if not found) */ int get_periph_clock_source(enum periph_id periph_id, enum clock_id parent, int *mux_bits, int *divider_bits) { enum clock_type_id type; enum periphc_internal_id internal_id; int mux; assert(clock_periph_id_isvalid(periph_id)); internal_id = periph_id_to_internal_id[periph_id]; assert(periphc_internal_id_isvalid(internal_id)); type = clock_periph_type[internal_id]; assert(clock_type_id_isvalid(type)); /* * Special cases here for the clock with a 4-bit source mux and I2C * with its 16-bit divisor */ if (type == CLOCK_TYPE_PCXTS) *mux_bits = MASK_BITS_31_28; else *mux_bits = MASK_BITS_31_30; if (type == CLOCK_TYPE_PCMT16) *divider_bits = 16; else *divider_bits = 8; for (mux = 0; mux < CLOCK_MAX_MUX; mux++) if (clock_source[type][mux] == parent) return mux; /* * Not found: it might be looking for the 'S' in CLOCK_TYPE_PCXTS * which is not in our table. If not, then they are asking for a * source which this peripheral can't access through its mux. */ assert(type == CLOCK_TYPE_PCXTS); assert(parent == CLOCK_ID_SFROM32KHZ); if (type == CLOCK_TYPE_PCXTS && parent == CLOCK_ID_SFROM32KHZ) return 4; /* mux value for this clock */ /* if we get here, either us or the caller has made a mistake */ printf("Caller requested bad clock: periph=%d, parent=%d\n", periph_id, parent); return -1; } void clock_set_enable(enum periph_id periph_id, int enable) { struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; u32 *clk = &clkrst->crc_clk_out_enb[PERIPH_REG(periph_id)]; u32 reg; /* Enable/disable the clock to this peripheral */ assert(clock_periph_id_isvalid(periph_id)); reg = readl(clk); if (enable) reg |= PERIPH_MASK(periph_id); else reg &= ~PERIPH_MASK(periph_id); writel(reg, clk); } void reset_set_enable(enum periph_id periph_id, int enable) { struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE; u32 *reset = &clkrst->crc_rst_dev[PERIPH_REG(periph_id)]; u32 reg; /* Enable/disable reset to the peripheral */ assert(clock_periph_id_isvalid(periph_id)); reg = readl(reset); if (enable) reg |= PERIPH_MASK(periph_id); else reg &= ~PERIPH_MASK(periph_id); writel(reg, reset); } #if CONFIG_IS_ENABLED(OF_CONTROL) /* * Convert a device tree clock ID to our peripheral ID. They are mostly * the same but we are very cautious so we check that a valid clock ID is * provided. * * @param clk_id Clock ID according to tegra20 device tree binding * @return peripheral ID, or PERIPH_ID_NONE if the clock ID is invalid */ enum periph_id clk_id_to_periph_id(int clk_id) { if (clk_id > PERIPH_ID_COUNT) return PERIPH_ID_NONE; switch (clk_id) { case PERIPH_ID_RESERVED1: case PERIPH_ID_RESERVED2: case PERIPH_ID_RESERVED30: case PERIPH_ID_RESERVED35: case PERIPH_ID_RESERVED56: case PERIPH_ID_PCIEXCLK: case PERIPH_ID_RESERVED76: case PERIPH_ID_RESERVED77: case PERIPH_ID_RESERVED78: case PERIPH_ID_RESERVED79: case PERIPH_ID_RESERVED80: case PERIPH_ID_RESERVED81: case PERIPH_ID_RESERVED82: case PERIPH_ID_RESERVED83: case PERIPH_ID_RESERVED91: return PERIPH_ID_NONE; default: return clk_id; } } #endif /* CONFIG_IS_ENABLED(OF_CONTROL) */ void clock_early_init(void) { /* * PLLP output frequency set to 216MHz * PLLC output frequency set to 600Mhz * * TODO: Can we calculate these values instead of hard-coding? */ switch (clock_get_osc_freq()) { case CLOCK_OSC_FREQ_12_0: /* OSC is 12Mhz */ clock_set_rate(CLOCK_ID_PERIPH, 432, 12, 1, 8); clock_set_rate(CLOCK_ID_CGENERAL, 600, 12, 0, 8); break; case CLOCK_OSC_FREQ_26_0: /* OSC is 26Mhz */ clock_set_rate(CLOCK_ID_PERIPH, 432, 26, 1, 8); clock_set_rate(CLOCK_ID_CGENERAL, 600, 26, 0, 8); break; case CLOCK_OSC_FREQ_13_0: /* OSC is 13Mhz */ clock_set_rate(CLOCK_ID_PERIPH, 432, 13, 1, 8); clock_set_rate(CLOCK_ID_CGENERAL, 600, 13, 0, 8); break; case CLOCK_OSC_FREQ_19_2: default: /* * These are not supported. It is too early to print a * message and the UART likely won't work anyway due to the * oscillator being wrong. */ break; } } void arch_timer_init(void) { } #define PMC_SATA_PWRGT 0x1ac #define PMC_SATA_PWRGT_PLLE_IDDQ_OVERRIDE (1 << 5) #define PMC_SATA_PWRGT_PLLE_IDDQ_SWCTL (1 << 4) #define PLLE_SS_CNTL 0x68 #define PLLE_SS_CNTL_SSCINCINTRV(x) (((x) & 0x3f) << 24) #define PLLE_SS_CNTL_SSCINC(x) (((x) & 0xff) << 16) #define PLLE_SS_CNTL_SSCBYP (1 << 12) #define PLLE_SS_CNTL_INTERP_RESET (1 << 11) #define PLLE_SS_CNTL_BYPASS_SS (1 << 10) #define PLLE_SS_CNTL_SSCMAX(x) (((x) & 0x1ff) << 0) #define PLLE_BASE 0x0e8 #define PLLE_BASE_ENABLE_CML (1 << 31) #define PLLE_BASE_ENABLE (1 << 30) #define PLLE_BASE_PLDIV_CML(x) (((x) & 0xf) << 24) #define PLLE_BASE_PLDIV(x) (((x) & 0x3f) << 16) #define PLLE_BASE_NDIV(x) (((x) & 0xff) << 8) #define PLLE_BASE_MDIV(x) (((x) & 0xff) << 0) #define PLLE_MISC 0x0ec #define PLLE_MISC_SETUP_BASE(x) (((x) & 0xffff) << 16) #define PLLE_MISC_PLL_READY (1 << 15) #define PLLE_MISC_LOCK (1 << 11) #define PLLE_MISC_LOCK_ENABLE (1 << 9) #define PLLE_MISC_SETUP_EXT(x) (((x) & 0x3) << 2) static int tegra_plle_train(void) { unsigned int timeout = 2000; unsigned long value; value = readl(NV_PA_PMC_BASE + PMC_SATA_PWRGT); value |= PMC_SATA_PWRGT_PLLE_IDDQ_OVERRIDE; writel(value, NV_PA_PMC_BASE + PMC_SATA_PWRGT); value = readl(NV_PA_PMC_BASE + PMC_SATA_PWRGT); value |= PMC_SATA_PWRGT_PLLE_IDDQ_SWCTL; writel(value, NV_PA_PMC_BASE + PMC_SATA_PWRGT); value = readl(NV_PA_PMC_BASE + PMC_SATA_PWRGT); value &= ~PMC_SATA_PWRGT_PLLE_IDDQ_OVERRIDE; writel(value, NV_PA_PMC_BASE + PMC_SATA_PWRGT); do { value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC); if (value & PLLE_MISC_PLL_READY) break; udelay(100); } while (--timeout); if (timeout == 0) { error("timeout waiting for PLLE to become ready"); return -ETIMEDOUT; } return 0; } int tegra_plle_enable(void) { unsigned int timeout = 1000; u32 value; int err; /* disable PLLE clock */ value = readl(NV_PA_CLK_RST_BASE + PLLE_BASE); value &= ~PLLE_BASE_ENABLE_CML; value &= ~PLLE_BASE_ENABLE; writel(value, NV_PA_CLK_RST_BASE + PLLE_BASE); /* clear lock enable and setup field */ value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC); value &= ~PLLE_MISC_LOCK_ENABLE; value &= ~PLLE_MISC_SETUP_BASE(0xffff); value &= ~PLLE_MISC_SETUP_EXT(0x3); writel(value, NV_PA_CLK_RST_BASE + PLLE_MISC); value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC); if ((value & PLLE_MISC_PLL_READY) == 0) { err = tegra_plle_train(); if (err < 0) { error("failed to train PLLE: %d", err); return err; } } value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC); value |= PLLE_MISC_SETUP_BASE(0x7); value |= PLLE_MISC_LOCK_ENABLE; value |= PLLE_MISC_SETUP_EXT(0); writel(value, NV_PA_CLK_RST_BASE + PLLE_MISC); value = readl(NV_PA_CLK_RST_BASE + PLLE_SS_CNTL); value |= PLLE_SS_CNTL_SSCBYP | PLLE_SS_CNTL_INTERP_RESET | PLLE_SS_CNTL_BYPASS_SS; writel(value, NV_PA_CLK_RST_BASE + PLLE_SS_CNTL); value = readl(NV_PA_CLK_RST_BASE + PLLE_BASE); value |= PLLE_BASE_ENABLE_CML | PLLE_BASE_ENABLE; writel(value, NV_PA_CLK_RST_BASE + PLLE_BASE); do { value = readl(NV_PA_CLK_RST_BASE + PLLE_MISC); if (value & PLLE_MISC_LOCK) break; udelay(2); } while (--timeout); if (timeout == 0) { error("timeout waiting for PLLE to lock"); return -ETIMEDOUT; } udelay(50); value = readl(NV_PA_CLK_RST_BASE + PLLE_SS_CNTL); value &= ~PLLE_SS_CNTL_SSCINCINTRV(0x3f); value |= PLLE_SS_CNTL_SSCINCINTRV(0x18); value &= ~PLLE_SS_CNTL_SSCINC(0xff); value |= PLLE_SS_CNTL_SSCINC(0x01); value &= ~PLLE_SS_CNTL_SSCBYP; value &= ~PLLE_SS_CNTL_INTERP_RESET; value &= ~PLLE_SS_CNTL_BYPASS_SS; value &= ~PLLE_SS_CNTL_SSCMAX(0x1ff); value |= PLLE_SS_CNTL_SSCMAX(0x24); writel(value, NV_PA_CLK_RST_BASE + PLLE_SS_CNTL); return 0; }