+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2011 The Chromium OS Authors.
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
*/
/* Tegra clock control functions */
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.
*
enum crc_reset_id {
/* Things we can hold in reset for each CPU */
crc_rst_cpu = 1,
- crc_rst_de = 1 << 2, /* What is de? */
- crc_rst_watchdog = 1 << 3,
- crc_rst_debug = 1 << 4,
+ crc_rst_de = 1 << 4, /* What is de? */
+ crc_rst_watchdog = 1 << 8,
+ crc_rst_debug = 1 << 12,
};
/**
*/
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
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 node Node to look at
* @return peripheral ID, or PERIPH_ID_NONE if none
*/
-enum periph_id clock_decode_periph_id(const void *blob, int node);
+int clock_decode_periph_id(struct udevice *dev);
/**
* Checks if the oscillator bypass is enabled (XOBP bit)
/* 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.
* @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 overriden), 1 if PLL is already correct
+ * be overridden), 1 if PLL is already correct
*/
int clock_set_rate(enum clock_id clkid, u32 n, u32 m, u32 p, u32 cpcon);
#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_ */
projects / oweals / u-boot.git / blobdiff