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-rw-r--r--arch/arm/include/asm/arch-tegra/clock.h421
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diff --git a/arch/arm/include/asm/arch-tegra/clock.h b/arch/arm/include/asm/arch-tegra/clock.h
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-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Copyright (c) 2011 The Chromium OS Authors.
- */
-
-/* Tegra clock control functions */
-
-#ifndef _TEGRA_CLOCK_H_
-#define _TEGRA_CLOCK_H_
-
-/* Set of oscillator frequencies supported in the internal API. */
-enum clock_osc_freq {
- /* All in MHz, so 13_0 is 13.0MHz */
- CLOCK_OSC_FREQ_13_0,
- CLOCK_OSC_FREQ_19_2,
- CLOCK_OSC_FREQ_12_0,
- CLOCK_OSC_FREQ_26_0,
- CLOCK_OSC_FREQ_38_4,
- CLOCK_OSC_FREQ_48_0,
-
- CLOCK_OSC_FREQ_COUNT,
-};
-
-/*
- * Note that no Tegra clock register actually uses all of bits 31:28 as
- * the mux field. Rather, bits 30:28, 29:28, or 28 are used. However, in
- * those cases, nothing is stored in the bits about the mux field, so it's
- * safe to pretend that the mux field extends all the way to the end of the
- * register. As such, the U-Boot clock driver is currently a bit lazy, and
- * doesn't distinguish between 31:28, 30:28, 29:28 and 28; it just lumps
- * them all together and pretends they're all 31:28.
- */
-enum {
- MASK_BITS_31_30,
- MASK_BITS_31_29,
- MASK_BITS_31_28,
-};
-
-#include <asm/arch/clock-tables.h>
-/* PLL stabilization delay in usec */
-#define CLOCK_PLL_STABLE_DELAY_US 300
-
-/* return the current oscillator clock frequency */
-enum clock_osc_freq clock_get_osc_freq(void);
-
-/* return the clk_m frequency */
-unsigned int clk_m_get_rate(unsigned int parent_rate);
-
-/**
- * Start PLL using the provided configuration parameters.
- *
- * @param id clock id
- * @param divm input divider
- * @param divn feedback divider
- * @param divp post divider 2^n
- * @param cpcon charge pump setup control
- * @param lfcon loop filter setup control
- *
- * @returns monotonic time in us that the PLL will be stable
- */
-unsigned long clock_start_pll(enum clock_id id, u32 divm, u32 divn,
- u32 divp, u32 cpcon, u32 lfcon);
-
-/**
- * Set PLL output frequency
- *
- * @param clkid clock id
- * @param pllout pll output id
- * @param rate desired output rate
- *
- * @return 0 if ok, -1 on error (invalid clock id or no suitable divider)
- */
-int clock_set_pllout(enum clock_id clkid, enum pll_out_id pllout,
- unsigned rate);
-
-/**
- * Read low-level parameters of a PLL.
- *
- * @param id clock id to read (note: USB is not supported)
- * @param divm returns input divider
- * @param divn returns feedback divider
- * @param divp returns post divider 2^n
- * @param cpcon returns charge pump setup control
- * @param lfcon returns loop filter setup control
- *
- * @returns 0 if ok, -1 on error (invalid clock id)
- */
-int clock_ll_read_pll(enum clock_id clkid, u32 *divm, u32 *divn,
- u32 *divp, u32 *cpcon, u32 *lfcon);
-
-/*
- * Enable a clock
- *
- * @param id clock id
- */
-void clock_enable(enum periph_id clkid);
-
-/*
- * Disable a clock
- *
- * @param id clock id
- */
-void clock_disable(enum periph_id clkid);
-
-/*
- * Set whether a clock is enabled or disabled.
- *
- * @param id clock id
- * @param enable 1 to enable, 0 to disable
- */
-void clock_set_enable(enum periph_id clkid, int enable);
-
-/**
- * Reset a peripheral. This puts it in reset, waits for a delay, then takes
- * it out of reset and waits for th delay again.
- *
- * @param periph_id peripheral to reset
- * @param us_delay time to delay in microseconds
- */
-void reset_periph(enum periph_id periph_id, int us_delay);
-
-/**
- * Put a peripheral into or out of reset.
- *
- * @param periph_id peripheral to reset
- * @param enable 1 to put into reset, 0 to take out of reset
- */
-void reset_set_enable(enum periph_id periph_id, int enable);
-
-
-/* CLK_RST_CONTROLLER_RST_CPU_CMPLX_SET/CLR_0 */
-enum crc_reset_id {
- /* Things we can hold in reset for each CPU */
- crc_rst_cpu = 1,
- crc_rst_de = 1 << 4, /* What is de? */
- crc_rst_watchdog = 1 << 8,
- crc_rst_debug = 1 << 12,
-};
-
-/**
- * Put parts of the CPU complex into or out of reset.\
- *
- * @param cpu cpu number (0 or 1 on Tegra2, 0-3 on Tegra3)
- * @param which which parts of the complex to affect (OR of crc_reset_id)
- * @param reset 1 to assert reset, 0 to de-assert
- */
-void reset_cmplx_set_enable(int cpu, int which, int reset);
-
-/**
- * Set the source for a peripheral clock. This plus the divisor sets the
- * clock rate. You need to look up the datasheet to see the meaning of the
- * source parameter as it changes for each peripheral.
- *
- * Warning: This function is only for use pre-relocation. Please use
- * clock_start_periph_pll() instead.
- *
- * @param periph_id peripheral to adjust
- * @param source source clock (0, 1, 2 or 3)
- */
-void clock_ll_set_source(enum periph_id periph_id, unsigned source);
-
-/**
- * This function is similar to clock_ll_set_source() except that it can be
- * used for clocks with more than 2 mux bits.
- *
- * @param periph_id peripheral to adjust
- * @param mux_bits number of mux bits for the clock
- * @param source source clock (0-15 depending on mux_bits)
- */
-int clock_ll_set_source_bits(enum periph_id periph_id, int mux_bits,
- unsigned source);
-
-/**
- * Set the source and divisor for a peripheral clock. This sets the
- * clock rate. You need to look up the datasheet to see the meaning of the
- * source parameter as it changes for each peripheral.
- *
- * Warning: This function is only for use pre-relocation. Please use
- * clock_start_periph_pll() instead.
- *
- * @param periph_id peripheral to adjust
- * @param source source clock (0, 1, 2 or 3)
- * @param divisor divisor value to use
- */
-void clock_ll_set_source_divisor(enum periph_id periph_id, unsigned source,
- unsigned divisor);
-
-/**
- * Returns the current parent clock ID of a given peripheral. This can be
- * useful in order to call clock_*_periph_*() from generic code that has no
- * specific knowledge of system-level clock tree structure.
- *
- * @param periph_id peripheral to query
- * @return clock ID of the peripheral's current parent clock
- */
-enum clock_id clock_get_periph_parent(enum periph_id periph_id);
-
-/**
- * Start a peripheral PLL clock at the given rate. This also resets the
- * peripheral.
- *
- * @param periph_id peripheral to start
- * @param parent PLL id of required parent clock
- * @param rate Required clock rate in Hz
- * @return rate selected in Hz, or -1U if something went wrong
- */
-unsigned clock_start_periph_pll(enum periph_id periph_id,
- enum clock_id parent, unsigned rate);
-
-/**
- * Returns the rate of a peripheral clock in Hz. Since the caller almost
- * certainly knows the parent clock (having just set it) we require that
- * this be passed in so we don't need to work it out.
- *
- * @param periph_id peripheral to start
- * @param parent PLL id of parent clock (used to calculate rate, you
- * must know this!)
- * @return clock rate of peripheral in Hz
- */
-unsigned long clock_get_periph_rate(enum periph_id periph_id,
- enum clock_id parent);
-
-/**
- * Adjust peripheral PLL clock to the given rate. This does not reset the
- * peripheral. If a second stage divisor is not available, pass NULL for
- * extra_div. If it is available, then this parameter will return the
- * divisor selected (which will be a power of 2 from 1 to 256).
- *
- * @param periph_id peripheral to start
- * @param parent PLL id of required parent clock
- * @param rate Required clock rate in Hz
- * @param extra_div value for the second-stage divisor (NULL if one is
- not available)
- * @return rate selected in Hz, or -1U if something went wrong
- */
-unsigned clock_adjust_periph_pll_div(enum periph_id periph_id,
- enum clock_id parent, unsigned rate, int *extra_div);
-
-/**
- * Returns the clock rate of a specified clock, in Hz.
- *
- * @param parent PLL id of clock to check
- * @return rate of clock in Hz
- */
-unsigned clock_get_rate(enum clock_id clkid);
-
-/**
- * Start up a UART using low-level calls
- *
- * Prior to relocation clock_start_periph_pll() cannot be called. This
- * function provides a way to set up a UART using low-level calls which
- * do not require BSS.
- *
- * @param periph_id Peripheral ID of UART to enable (e,g, PERIPH_ID_UART1)
- */
-void clock_ll_start_uart(enum periph_id periph_id);
-
-/**
- * Decode a peripheral ID from a device tree node.
- *
- * This works by looking up the peripheral's 'clocks' node and reading out
- * the second cell, which is the clock number / peripheral ID.
- *
- * @param blob FDT blob to use
- * @param node Node to look at
- * @return peripheral ID, or PERIPH_ID_NONE if none
- */
-int clock_decode_periph_id(struct udevice *dev);
-
-/**
- * Checks if the oscillator bypass is enabled (XOBP bit)
- *
- * @return 1 if bypass is enabled, 0 if not
- */
-int clock_get_osc_bypass(void);
-
-/*
- * Checks that clocks are valid and prints a warning if not
- *
- * @return 0 if ok, -1 on error
- */
-int clock_verify(void);
-
-/* Initialize the clocks */
-void clock_init(void);
-
-/* Initialize the PLLs */
-void clock_early_init(void);
-
-/* @return true if hardware indicates that clock_early_init() was called */
-bool clock_early_init_done(void);
-
-/* Returns a pointer to the clock source register for a peripheral */
-u32 *get_periph_source_reg(enum periph_id periph_id);
-
-/* Returns a pointer to the given 'simple' PLL */
-struct clk_pll_simple *clock_get_simple_pll(enum clock_id clkid);
-
-/*
- * Given a peripheral ID, determine where the mux bits are in the peripheral
- * clock's register, the number of divider bits the clock has, and the SoC-
- * specific clock type.
- *
- * This is an internal API between the core Tegra clock code and the SoC-
- * specific clock code.
- *
- * @param periph_id peripheral to query
- * @param mux_bits Set to number of bits in mux register
- * @param divider_bits Set to the relevant MASK_BITS_* value
- * @param type Set to the SoC-specific clock type
- * @return 0 on success, -1 on error
- */
-int get_periph_clock_info(enum periph_id periph_id, int *mux_bits,
- int *divider_bits, int *type);
-
-/*
- * Given a peripheral ID and clock source mux value, determine the clock_id
- * of that peripheral's parent.
- *
- * This is an internal API between the core Tegra clock code and the SoC-
- * specific clock code.
- *
- * @param periph_id peripheral to query
- * @param source raw clock source mux value
- * @return the CLOCK_ID_* value @source represents
- */
-enum clock_id get_periph_clock_id(enum periph_id periph_id, int source);
-
-/**
- * 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);
-
-/*
- * 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 tegra30 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);
-
-/**
- * Set the output frequency you want for each PLL clock.
- * PLL output frequencies are programmed by setting their N, M and P values.
- * The governing equations are:
- * VCO = (Fi / m) * n, Fo = VCO / (2^p)
- * where Fo is the output frequency from the PLL.
- * Example: Set the output frequency to 216Mhz(Fo) with 12Mhz OSC(Fi)
- * 216Mhz = ((12Mhz / m) * n) / (2^p) so n=432,m=12,p=1
- * Please see Tegra TRM section 5.3 to get the detail for PLL Programming
- *
- * @param n PLL feedback divider(DIVN)
- * @param m PLL input divider(DIVN)
- * @param p post divider(DIVP)
- * @param cpcon base PLL charge pump(CPCON)
- * @return 0 if ok, -1 on error (the requested PLL is incorrect and cannot
- * be overridden), 1 if PLL is already correct
- */
-int clock_set_rate(enum clock_id clkid, u32 n, u32 m, u32 p, u32 cpcon);
-
-/* return 1 if a peripheral ID is in range */
-#define clock_type_id_isvalid(id) ((id) >= 0 && \
- (id) < CLOCK_TYPE_COUNT)
-
-/* return 1 if a periphc_internal_id is in range */
-#define periphc_internal_id_isvalid(id) ((id) >= 0 && \
- (id) < PERIPHC_COUNT)
-
-/* SoC-specific TSC init */
-void arch_timer_init(void);
-
-void tegra30_set_up_pllp(void);
-
-/* Number of PLL-based clocks (i.e. not OSC, MCLK or 32KHz) */
-#define CLOCK_ID_PLL_COUNT (CLOCK_ID_COUNT - 3)
-
-struct clk_pll_info {
- u32 m_shift:5; /* DIVM_SHIFT */
- u32 n_shift:5; /* DIVN_SHIFT */
- u32 p_shift:5; /* DIVP_SHIFT */
- u32 kcp_shift:5; /* KCP/cpcon SHIFT */
- u32 kvco_shift:5; /* KVCO/lfcon SHIFT */
- u32 lock_ena:6; /* LOCK_ENABLE/EN_LOCKDET shift */
- u32 rsvd:1;
- u32 m_mask:10; /* DIVM_MASK */
- u32 n_mask:12; /* DIVN_MASK */
- u32 p_mask:10; /* DIVP_MASK or VCO_MASK */
- u32 kcp_mask:10; /* KCP/CPCON MASK */
- u32 kvco_mask:10; /* KVCO/LFCON MASK */
- u32 lock_det:6; /* LOCK_DETECT/LOCKED shift */
- u32 rsvd2:6;
-};
-extern struct clk_pll_info tegra_pll_info_table[CLOCK_ID_PLL_COUNT];
-
-struct periph_clk_init {
- enum periph_id periph_id;
- enum clock_id parent_clock_id;
-};
-extern struct periph_clk_init periph_clk_init_table[];
-
-/**
- * Enable output clock for external peripherals
- *
- * @param clk_id Clock ID to output (1, 2 or 3)
- * @return 0 if OK. -ve on error
- */
-int clock_external_output(int clk_id);
-
-#endif /* _TEGRA_CLOCK_H_ */