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u-boot/arch/arm/mach-tegra/tegra114/clock.c
Stephen Warren d0ad8a5cbf ARM: tegra: add APIs the clock uclass driver will need 
A future patch will implement a clock uclass driver for Tegra. That driver
will call into Tegra's existing clock code to simplify the transition;
this avoids tieing the clock uclass patches into significant refactoring
of the existing custom clock API implementation.

Some of the Tegra clock APIs that manipulate peripheral clocks require
both the peripheral clock ID and parent clock ID to be passed in together.
However, the clock uclass API does not require any such "parent"
parameter, so the clock driver must determine this information itself.
This patch implements new Tegra- specific clock API
clock_get_periph_parent() for this purpose.

The new API is implemented in the core Tegra clock code rather than SoC-
specific clock code. The implementation uses various SoC-/clock-specific
data. That data is only available in SoC-specific clock code.
Consequently, two new internal APIs are added that enable the core clock
code to retrieve this information from the SoC-specific clock code. Due to
the structure of the Tegra clock code, this leads to some unfortunate code
duplication. However, this situation predates this patch.

Ideally, future work will de-duplicate the Tegra clock code, and migrate
it into drivers/clk/tegra. However, such refactoring is kept separate from
this series.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2016-09-27 09:11:02 -07:00

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/*
* (C) Copyright 2010-2015
* NVIDIA Corporation <www.nvidia.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/* Tegra114 Clock control functions */
#include <common.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/sysctr.h>
#include <asm/arch/tegra.h>
#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra/timer.h>
#include <div64.h>
#include <fdtdec.h>
/*
* Clock types that we can use as a source. The Tegra114 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_PDCT,
CLOCK_TYPE_ACPT,
CLOCK_TYPE_ASPTE,
CLOCK_TYPE_PMDACD2T,
CLOCK_TYPE_PCST,
CLOCK_TYPE_COUNT,
CLOCK_TYPE_NONE = -1, /* invalid clock type */
};
enum {
CLOCK_MAX_MUX = 8 /* 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:
* The extra column in each clock source array is used to store the mask
* bits in its register for the source.
*/
#define CLK(x) CLOCK_ID_ ## x
static enum clock_id clock_source[CLOCK_TYPE_COUNT][CLOCK_MAX_MUX+1] = {
{ CLK(AUDIO), CLK(XCPU), CLK(PERIPH), CLK(OSC),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_30},
{ CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(AUDIO),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_30},
{ CLK(MEMORY), CLK(CGENERAL), CLK(PERIPH), CLK(OSC),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_30},
{ CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(NONE),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_30},
{ CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_30},
{ CLK(PERIPH), CLK(CGENERAL), CLK(MEMORY), CLK(OSC),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_30},
{ CLK(PERIPH), CLK(DISPLAY), CLK(CGENERAL), CLK(OSC),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_30},
{ CLK(AUDIO), CLK(CGENERAL), CLK(PERIPH), CLK(OSC),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_30},
{ CLK(AUDIO), CLK(SFROM32KHZ), CLK(PERIPH), CLK(OSC),
CLK(EPCI), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_29},
{ CLK(PERIPH), CLK(MEMORY), CLK(DISPLAY), CLK(AUDIO),
CLK(CGENERAL), CLK(DISPLAY2), CLK(OSC), CLK(NONE),
MASK_BITS_31_29},
{ CLK(PERIPH), CLK(CGENERAL), CLK(SFROM32KHZ), CLK(OSC),
CLK(NONE), CLK(NONE), CLK(NONE), CLK(NONE),
MASK_BITS_31_28}
};
/*
* 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_PCST), /* only PWM uses b29:28 */
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_SBC2, CLOCK_TYPE_PCMT),
TYPE(PERIPHC_SBC3, CLOCK_TYPE_PCMT),
/* 0x08 */
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_I2C1, CLOCK_TYPE_PCMT16),
TYPE(PERIPHC_I2C5, CLOCK_TYPE_PCMT16),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_SBC1, CLOCK_TYPE_PCMT),
TYPE(PERIPHC_DISP1, CLOCK_TYPE_PMDACD2T),
TYPE(PERIPHC_DISP2, CLOCK_TYPE_PMDACD2T),
/* 0x10 */
TYPE(PERIPHC_CVE, CLOCK_TYPE_PDCT),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
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), /* MIPI base-band HSI */
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_PMDACD2T),
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_SBC4, 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),
TYPE(PERIPHC_I2S0, CLOCK_TYPE_AXPT),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
/* 0x38h */ /* Jumps to reg offset 0x3B0h */
TYPE(PERIPHC_G3D2, CLOCK_TYPE_MCPA),
TYPE(PERIPHC_MSELECT, CLOCK_TYPE_PCMT),
TYPE(PERIPHC_TSENSOR, CLOCK_TYPE_PCST), /* s/b PCTS */
TYPE(PERIPHC_I2S3, CLOCK_TYPE_AXPT),
TYPE(PERIPHC_I2S4, CLOCK_TYPE_AXPT),
TYPE(PERIPHC_I2C4, CLOCK_TYPE_PCMT16),
TYPE(PERIPHC_SBC5, CLOCK_TYPE_PCMT),
TYPE(PERIPHC_SBC6, CLOCK_TYPE_PCMT),
/* 0x40 */
TYPE(PERIPHC_AUDIO, CLOCK_TYPE_ACPT),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_DAM0, CLOCK_TYPE_ACPT),
TYPE(PERIPHC_DAM1, CLOCK_TYPE_ACPT),
TYPE(PERIPHC_DAM2, CLOCK_TYPE_ACPT),
TYPE(PERIPHC_HDA2CODEC2X, CLOCK_TYPE_PCMT),
TYPE(PERIPHC_ACTMON, CLOCK_TYPE_PCST), /* MASK 31:30 */
TYPE(PERIPHC_EXTPERIPH1, CLOCK_TYPE_ASPTE),
/* 0x48 */
TYPE(PERIPHC_EXTPERIPH2, CLOCK_TYPE_ASPTE),
TYPE(PERIPHC_EXTPERIPH3, CLOCK_TYPE_ASPTE),
TYPE(PERIPHC_NANDSPEED, CLOCK_TYPE_PCMT),
TYPE(PERIPHC_I2CSLOW, CLOCK_TYPE_PCST), /* MASK 31:30 */
TYPE(PERIPHC_SYS, CLOCK_TYPE_NONE),
TYPE(PERIPHC_SPEEDO, CLOCK_TYPE_PCMT),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
/* 0x50 */
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_NONE, CLOCK_TYPE_NONE),
TYPE(PERIPHC_SATAOOB, CLOCK_TYPE_PCMT), /* offset 0x420h */
TYPE(PERIPHC_SATA, CLOCK_TYPE_PCMT),
TYPE(PERIPHC_HDA, 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(COP),
NONE(TRIGSYS),
NONE(RESERVED3),
NONE(RTC),
NONE(TMR),
PERIPHC_UART1,
PERIPHC_UART2, /* and vfir 0x68 */
/* 8 */
NONE(GPIO),
PERIPHC_SDMMC2,
NONE(SPDIF), /* 0x08 and 0x0c, unclear which to use */
PERIPHC_I2S1,
PERIPHC_I2C1,
PERIPHC_NDFLASH,
PERIPHC_SDMMC1,
PERIPHC_SDMMC4,
/* 16 */
NONE(RESERVED16),
PERIPHC_PWM,
PERIPHC_I2S2,
PERIPHC_EPP,
PERIPHC_VI,
PERIPHC_G2D,
NONE(USBD),
NONE(ISP),
/* 24 */
PERIPHC_G3D,
NONE(RESERVED25),
PERIPHC_DISP2,
PERIPHC_DISP1,
PERIPHC_HOST1X,
NONE(VCP),
PERIPHC_I2S0,
NONE(CACHE2),
/* Middle word: 63:32 */
NONE(MEM),
NONE(AHBDMA),
NONE(APBDMA),
NONE(RESERVED35),
NONE(RESERVED36),
NONE(STAT_MON),
NONE(RESERVED38),
NONE(RESERVED39),
/* 40 */
NONE(KFUSE),
NONE(SBC1), /* SBC1, 0x34, is this SPI1? */
PERIPHC_NOR,
NONE(RESERVED43),
PERIPHC_SBC2,
NONE(RESERVED45),
PERIPHC_SBC3,
PERIPHC_I2C5,
/* 48 */
NONE(DSI),
PERIPHC_TVO, /* also CVE 0x40 */
PERIPHC_MIPI,
PERIPHC_HDMI,
NONE(CSI),
PERIPHC_TVDAC,
PERIPHC_I2C2,
PERIPHC_UART3,
/* 56 */
NONE(RESERVED56),
PERIPHC_EMC,
NONE(USB2),
NONE(USB3),
PERIPHC_MPE,
PERIPHC_VDE,
NONE(BSEA),
NONE(BSEV),
/* Upper word 95:64 */
PERIPHC_SPEEDO,
PERIPHC_UART4,
PERIPHC_UART5,
PERIPHC_I2C3,
PERIPHC_SBC4,
PERIPHC_SDMMC3,
NONE(PCIE),
PERIPHC_OWR,
/* 72 */
NONE(AFI),
PERIPHC_CSITE,
NONE(PCIEXCLK),
NONE(AVPUCQ),
NONE(RESERVED76),
NONE(RESERVED77),
NONE(RESERVED78),
NONE(DTV),
/* 80 */
PERIPHC_NANDSPEED,
PERIPHC_I2CSLOW,
NONE(DSIB),
NONE(RESERVED83),
NONE(IRAMA),
NONE(IRAMB),
NONE(IRAMC),
NONE(IRAMD),
/* 88 */
NONE(CRAM2),
NONE(RESERVED89),
NONE(MDOUBLER),
NONE(RESERVED91),
NONE(SUSOUT),
NONE(RESERVED93),
NONE(RESERVED94),
NONE(RESERVED95),
/* V word: 31:0 */
NONE(CPUG),
NONE(CPULP),
PERIPHC_G3D2,
PERIPHC_MSELECT,
PERIPHC_TSENSOR,
PERIPHC_I2S3,
PERIPHC_I2S4,
PERIPHC_I2C4,
/* 08 */
PERIPHC_SBC5,
PERIPHC_SBC6,
PERIPHC_AUDIO,
NONE(APBIF),
PERIPHC_DAM0,
PERIPHC_DAM1,
PERIPHC_DAM2,
PERIPHC_HDA2CODEC2X,
/* 16 */
NONE(ATOMICS),
NONE(RESERVED17),
NONE(RESERVED18),
NONE(RESERVED19),
NONE(RESERVED20),
NONE(RESERVED21),
NONE(RESERVED22),
PERIPHC_ACTMON,
/* 24 */
NONE(RESERVED24),
NONE(RESERVED25),
NONE(RESERVED26),
NONE(RESERVED27),
PERIPHC_SATA,
PERIPHC_HDA,
NONE(RESERVED30),
NONE(RESERVED31),
/* W word: 31:0 */
NONE(HDA2HDMICODEC),
NONE(RESERVED1_SATACOLD),
NONE(RESERVED2_PCIERX0),
NONE(RESERVED3_PCIERX1),
NONE(RESERVED4_PCIERX2),
NONE(RESERVED5_PCIERX3),
NONE(RESERVED6_PCIERX4),
NONE(RESERVED7_PCIERX5),
/* 40 */
NONE(CEC),
NONE(PCIE2_IOBIST),
NONE(EMC_IOBIST),
NONE(HDMI_IOBIST),
NONE(SATA_IOBIST),
NONE(MIPI_IOBIST),
NONE(EMC1_IOBIST),
NONE(XUSB),
/* 48 */
NONE(CILAB),
NONE(CILCD),
NONE(CILE),
NONE(DSIA_LP),
NONE(DSIB_LP),
NONE(RESERVED21_ENTROPY),
NONE(RESERVED22_W),
NONE(RESERVED23_W),
/* 56 */
NONE(RESERVED24_W),
NONE(AMX0),
NONE(ADX0),
NONE(DVFS),
NONE(XUSB_SS),
NONE(EMC_DLL),
NONE(MC1),
NONE(EMC1),
};
/*
* PLL divider shift/mask tables for all PLL IDs.
*/
struct clk_pll_info tegra_pll_info_table[CLOCK_ID_PLL_COUNT] = {
/*
* T114: some deviations from T2x/T30.
* 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 = 0xFF, .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 = 0xFF, .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 = 0xFF, .n_shift = 8, .n_mask = 0xFF, .p_shift = 20, .p_mask = 0x0F,
.lock_ena = 18, .lock_det = 27, .kcp_shift = 0, .kcp_mask = 0, .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 = 27, .kcp_shift = 8, .kcp_mask = 0xF, .kvco_shift = 4, .kvco_mask = 0xF }, /* PLLS (RESERVED) */
};
/*
* Get the oscillator frequency, from the corresponding hardware configuration
* field. Note that T30/T114 support 3 new higher freqs, but we map back
* to the old T20 freqs. Support for the higher oscillators is TBD.
*/
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);
reg = (reg & OSC_FREQ_MASK) >> OSC_FREQ_SHIFT;
if (reg & 1) /* one of the newer freqs */
printf("Warning: OSC_FREQ is unsupported! (%d)\n", reg);
return reg >> 2; /* Map to most common (T20) freqs */
}
/* 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;
/* Coresight is a special case */
if (periph_id == PERIPH_ID_CSI)
return &clkrst->crc_clk_src[PERIPH_ID_CSI+1];
assert(periph_id >= PERIPH_ID_FIRST && periph_id < PERIPH_ID_COUNT);
internal_id = periph_id_to_internal_id[periph_id];
assert(internal_id != -1);
if (internal_id >= PERIPHC_VW_FIRST) {
internal_id -= PERIPHC_VW_FIRST;
return &clkrst->crc_clk_src_vw[internal_id];
} else
return &clkrst->crc_clk_src[internal_id];
}
int get_periph_clock_info(enum periph_id periph_id, int *mux_bits,
int *divider_bits, int *type)
{
enum periphc_internal_id internal_id;
if (!clock_periph_id_isvalid(periph_id))
return -1;
internal_id = periph_id_to_internal_id[periph_id];
if (!periphc_internal_id_isvalid(internal_id))
return -1;
*type = clock_periph_type[internal_id];
if (!clock_type_id_isvalid(*type))
return -1;
*mux_bits = clock_source[*type][CLOCK_MAX_MUX];
if (*type == CLOCK_TYPE_PCMT16)
*divider_bits = 16;
else
*divider_bits = 8;
return 0;
}
enum clock_id get_periph_clock_id(enum periph_id periph_id, int source)
{
enum periphc_internal_id internal_id;
int type;
if (!clock_periph_id_isvalid(periph_id))
return CLOCK_ID_NONE;
internal_id = periph_id_to_internal_id[periph_id];
if (!periphc_internal_id_isvalid(internal_id))
return CLOCK_ID_NONE;
type = clock_periph_type[internal_id];
if (!clock_type_id_isvalid(type))
return CLOCK_ID_NONE;
return clock_source[type][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)
{
enum clock_type_id type;
int mux, err;
err = get_periph_clock_info(periph_id, mux_bits, divider_bits, &type);
assert(!err);
for (mux = 0; mux < CLOCK_MAX_MUX; mux++)
if (clock_source[type][mux] == parent)
return mux;
/* 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;
u32 reg;
/* Enable/disable the clock to this peripheral */
assert(clock_periph_id_isvalid(periph_id));
if ((int)periph_id < (int)PERIPH_ID_VW_FIRST)
clk = &clkrst->crc_clk_out_enb[PERIPH_REG(periph_id)];
else
clk = &clkrst->crc_clk_out_enb_vw[PERIPH_REG(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;
u32 reg;
/* Enable/disable reset to the peripheral */
assert(clock_periph_id_isvalid(periph_id));
if (periph_id < PERIPH_ID_VW_FIRST)
reset = &clkrst->crc_rst_dev[PERIPH_REG(periph_id)];
else
reset = &clkrst->crc_rst_dev_vw[PERIPH_REG(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 tegra114 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_RESERVED3:
case PERIPH_ID_RESERVED16:
case PERIPH_ID_RESERVED24:
case PERIPH_ID_RESERVED35:
case PERIPH_ID_RESERVED43:
case PERIPH_ID_RESERVED45:
case PERIPH_ID_RESERVED56:
case PERIPH_ID_RESERVED76:
case PERIPH_ID_RESERVED77:
case PERIPH_ID_RESERVED78:
case PERIPH_ID_RESERVED83:
case PERIPH_ID_RESERVED89:
case PERIPH_ID_RESERVED91:
case PERIPH_ID_RESERVED93:
case PERIPH_ID_RESERVED94:
case PERIPH_ID_RESERVED95:
return PERIPH_ID_NONE;
default:
return clk_id;
}
}
#endif /* CONFIG_IS_ENABLED(OF_CONTROL) */
void clock_early_init(void)
{
struct clk_rst_ctlr *clkrst =
(struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
struct clk_pll_info *pllinfo;
u32 data;
tegra30_set_up_pllp();
/* clear IDDQ before accessing any other PLLC registers */
pllinfo = &tegra_pll_info_table[CLOCK_ID_CGENERAL];
clrbits_le32(&clkrst->crc_pll[CLOCK_ID_CGENERAL].pll_misc, PLLC_IDDQ);
udelay(2);
/*
* PLLC output frequency set to 600Mhz
* PLLD output frequency set to 925Mhz
*/
switch (clock_get_osc_freq()) {
case CLOCK_OSC_FREQ_12_0: /* OSC is 12Mhz */
clock_set_rate(CLOCK_ID_CGENERAL, 600, 12, 0, 8);
clock_set_rate(CLOCK_ID_DISPLAY, 925, 12, 0, 12);
break;
case CLOCK_OSC_FREQ_26_0: /* OSC is 26Mhz */
clock_set_rate(CLOCK_ID_CGENERAL, 600, 26, 0, 8);
clock_set_rate(CLOCK_ID_DISPLAY, 925, 26, 0, 12);
break;
case CLOCK_OSC_FREQ_13_0: /* OSC is 13Mhz */
clock_set_rate(CLOCK_ID_CGENERAL, 600, 13, 0, 8);
clock_set_rate(CLOCK_ID_DISPLAY, 925, 13, 0, 12);
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;
}
/* PLLC_MISC2: Set dynramp_stepA/B. MISC2 maps to pll_out[1] */
writel(0x00561600, &clkrst->crc_pll[CLOCK_ID_CGENERAL].pll_out[1]);
/* PLLC_MISC: Set LOCK_ENABLE */
pllinfo = &tegra_pll_info_table[CLOCK_ID_CGENERAL];
setbits_le32(&clkrst->crc_pll[CLOCK_ID_CGENERAL].pll_misc, (1 << pllinfo->lock_ena));
udelay(2);
/* PLLD_MISC: Set CLKENABLE, CPCON 12, LFCON 1, and enable lock */
pllinfo = &tegra_pll_info_table[CLOCK_ID_DISPLAY];
data = (12 << pllinfo->kcp_shift) | (1 << pllinfo->kvco_shift);
data |= (1 << PLLD_CLKENABLE) | (1 << pllinfo->lock_ena);
writel(data, &clkrst->crc_pll[CLOCK_ID_DISPLAY].pll_misc);
udelay(2);
}
void arch_timer_init(void)
{
struct sysctr_ctlr *sysctr = (struct sysctr_ctlr *)NV_PA_TSC_BASE;
u32 freq, val;
freq = clock_get_rate(CLOCK_ID_CLK_M);
debug("%s: clk_m freq is %dHz [0x%08X]\n", __func__, freq, freq);
/* ARM CNTFRQ */
asm("mcr p15, 0, %0, c14, c0, 0\n" : : "r" (freq));
/* Only T114 has the System Counter regs */
debug("%s: setting CNTFID0 to 0x%08X\n", __func__, freq);
writel(freq, &sysctr->cntfid0);
val = readl(&sysctr->cntcr);
val |= TSC_CNTCR_ENABLE | TSC_CNTCR_HDBG;
writel(val, &sysctr->cntcr);
debug("%s: TSC CNTCR = 0x%08X\n", __func__, val);
}
struct periph_clk_init periph_clk_init_table[] = {
{ PERIPH_ID_SBC1, CLOCK_ID_PERIPH },
{ PERIPH_ID_SBC2, CLOCK_ID_PERIPH },
{ PERIPH_ID_SBC3, CLOCK_ID_PERIPH },
{ PERIPH_ID_SBC4, CLOCK_ID_PERIPH },
{ PERIPH_ID_SBC5, CLOCK_ID_PERIPH },
{ PERIPH_ID_SBC6, CLOCK_ID_PERIPH },
{ PERIPH_ID_HOST1X, CLOCK_ID_PERIPH },
{ PERIPH_ID_DISP1, CLOCK_ID_CGENERAL },
{ PERIPH_ID_NDFLASH, CLOCK_ID_PERIPH },
{ PERIPH_ID_SDMMC1, CLOCK_ID_PERIPH },
{ PERIPH_ID_SDMMC2, CLOCK_ID_PERIPH },
{ PERIPH_ID_SDMMC3, CLOCK_ID_PERIPH },
{ PERIPH_ID_SDMMC4, CLOCK_ID_PERIPH },
{ PERIPH_ID_PWM, CLOCK_ID_SFROM32KHZ },
{ PERIPH_ID_I2C1, CLOCK_ID_PERIPH },
{ PERIPH_ID_I2C2, CLOCK_ID_PERIPH },
{ PERIPH_ID_I2C3, CLOCK_ID_PERIPH },
{ PERIPH_ID_I2C4, CLOCK_ID_PERIPH },
{ PERIPH_ID_I2C5, CLOCK_ID_PERIPH },
{ -1, },
};
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