path: root/drivers/clk/tegra/clk-tegra124.c

/*
 * Copyright (c) 2012-2014 NVIDIA CORPORATION.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
 */

#include <linux/io.h>
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/delay.h>
#include <linux/export.h>
#include <linux/clk/tegra.h>
#include <dt-bindings/clock/tegra124-car.h>
#include <dt-bindings/reset/tegra124-car.h>

#include "clk.h"
#include "clk-id.h"

/*
 * TEGRA124_CAR_BANK_COUNT: the number of peripheral clock register
 * banks present in the Tegra124/132 CAR IP block.  The banks are
 * identified by single letters, e.g.: L, H, U, V, W, X.  See
 * periph_regs[] in drivers/clk/tegra/clk.c
 */
#define TEGRA124_CAR_BANK_COUNT			6

#define CLK_SOURCE_CSITE 0x1d4
#define CLK_SOURCE_EMC 0x19c

#define RST_DFLL_DVCO			0x2f4
#define DVFS_DFLL_RESET_SHIFT		0

#define PLLC_BASE 0x80
#define PLLC_OUT 0x84
#define PLLC_MISC2 0x88
#define PLLC_MISC 0x8c
#define PLLC2_BASE 0x4e8
#define PLLC2_MISC 0x4ec
#define PLLC3_BASE 0x4fc
#define PLLC3_MISC 0x500
#define PLLM_BASE 0x90
#define PLLM_OUT 0x94
#define PLLM_MISC 0x9c
#define PLLP_BASE 0xa0
#define PLLP_MISC 0xac
#define PLLA_BASE 0xb0
#define PLLA_MISC 0xbc
#define PLLD_BASE 0xd0
#define PLLD_MISC 0xdc
#define PLLU_BASE 0xc0
#define PLLU_MISC 0xcc
#define PLLX_BASE 0xe0
#define PLLX_MISC 0xe4
#define PLLX_MISC2 0x514
#define PLLX_MISC3 0x518
#define PLLE_BASE 0xe8
#define PLLE_MISC 0xec
#define PLLD2_BASE 0x4b8
#define PLLD2_MISC 0x4bc
#define PLLE_AUX 0x48c
#define PLLRE_BASE 0x4c4
#define PLLRE_MISC 0x4c8
#define PLLDP_BASE 0x590
#define PLLDP_MISC 0x594
#define PLLC4_BASE 0x5a4
#define PLLC4_MISC 0x5a8

#define PLLC_IDDQ_BIT 26
#define PLLRE_IDDQ_BIT 16
#define PLLSS_IDDQ_BIT 19

#define PLL_BASE_LOCK BIT(27)
#define PLLE_MISC_LOCK BIT(11)
#define PLLRE_MISC_LOCK BIT(24)

#define PLL_MISC_LOCK_ENABLE 18
#define PLLC_MISC_LOCK_ENABLE 24
#define PLLDU_MISC_LOCK_ENABLE 22
#define PLLE_MISC_LOCK_ENABLE 9
#define PLLRE_MISC_LOCK_ENABLE 30
#define PLLSS_MISC_LOCK_ENABLE 30

#define PLLXC_SW_MAX_P 6

#define PMC_PLLM_WB0_OVERRIDE 0x1dc
#define PMC_PLLM_WB0_OVERRIDE_2 0x2b0

#define CCLKG_BURST_POLICY 0x368

/* Tegra CPU clock and reset control regs */
#define CLK_RST_CONTROLLER_CPU_CMPLX_STATUS	0x470

#ifdef CONFIG_PM_SLEEP
static struct cpu_clk_suspend_context {
	u32 clk_csite_src;
	u32 cclkg_burst;
	u32 cclkg_divider;
} tegra124_cpu_clk_sctx;
#endif

static void __iomem *clk_base;
static void __iomem *pmc_base;

static unsigned long osc_freq;
static unsigned long pll_ref_freq;

static DEFINE_SPINLOCK(pll_d_lock);
static DEFINE_SPINLOCK(pll_e_lock);
static DEFINE_SPINLOCK(pll_re_lock);
static DEFINE_SPINLOCK(pll_u_lock);
static DEFINE_SPINLOCK(emc_lock);

/* possible OSC frequencies in Hz */
static unsigned long tegra124_input_freq[] = {
	[ 0] = 13000000,
	[ 1] = 16800000,
	[ 4] = 19200000,
	[ 5] = 38400000,
	[ 8] = 12000000,
	[ 9] = 48000000,
	[12] = 26000000,
};

static struct div_nmp pllxc_nmp = {
	.divm_shift = 0,
	.divm_width = 8,
	.divn_shift = 8,
	.divn_width = 8,
	.divp_shift = 20,
	.divp_width = 4,
};

static const struct pdiv_map pllxc_p[] = {
	{ .pdiv =  1, .hw_val =  0 },
	{ .pdiv =  2, .hw_val =  1 },
	{ .pdiv =  3, .hw_val =  2 },
	{ .pdiv =  4, .hw_val =  3 },
	{ .pdiv =  5, .hw_val =  4 },
	{ .pdiv =  6, .hw_val =  5 },
	{ .pdiv =  8, .hw_val =  6 },
	{ .pdiv = 10, .hw_val =  7 },
	{ .pdiv = 12, .hw_val =  8 },
	{ .pdiv = 16, .hw_val =  9 },
	{ .pdiv = 12, .hw_val = 10 },
	{ .pdiv = 16, .hw_val = 11 },
	{ .pdiv = 20, .hw_val = 12 },
	{ .pdiv = 24, .hw_val = 13 },
	{ .pdiv = 32, .hw_val = 14 },
	{ .pdiv =  0, .hw_val =  0 },
};

static struct tegra_clk_pll_freq_table pll_x_freq_table[] = {
	/* 1 GHz */
	{ 12000000, 1000000000, 83, 1, 1, 0 }, /* actual: 996.0 MHz */
	{ 13000000, 1000000000, 76, 1, 1, 0 }, /* actual: 988.0 MHz */
	{ 16800000, 1000000000, 59, 1, 1, 0 }, /* actual: 991.2 MHz */
	{ 19200000, 1000000000, 52, 1, 1, 0 }, /* actual: 998.4 MHz */
	{ 26000000, 1000000000, 76, 2, 1, 0 }, /* actual: 988.0 MHz */
	{        0,          0,  0, 0, 0, 0 },
};

static struct tegra_clk_pll_params pll_x_params = {
	.input_min = 12000000,
	.input_max = 800000000,
	.cf_min = 12000000,
	.cf_max = 19200000,	/* s/w policy, h/w capability 50 MHz */
	.vco_min = 700000000,
	.vco_max = 3000000000UL,
	.base_reg = PLLX_BASE,
	.misc_reg = PLLX_MISC,
	.lock_mask = PLL_BASE_LOCK,
	.lock_enable_bit_idx = PLL_MISC_LOCK_ENABLE,
	.lock_delay = 300,
	.iddq_reg = PLLX_MISC3,
	.iddq_bit_idx = 3,
	.max_p = 6,
	.dyn_ramp_reg = PLLX_MISC2,
	.stepa_shift = 16,
	.stepb_shift = 24,
	.pdiv_tohw = pllxc_p,
	.div_nmp = &pllxc_nmp,
	.freq_table = pll_x_freq_table,
	.flags = TEGRA_PLL_USE_LOCK | TEGRA_PLL_HAS_LOCK_ENABLE,
};

static struct tegra_clk_pll_freq_table pll_c_freq_table[] = {
	{ 12000000, 624000000, 104, 1, 2, 0 },
	{ 12000000, 600000000, 100, 1, 2, 0 },
	{ 13000000, 600000000,  92, 1, 2, 0 }, /* actual: 598.0 MHz */
	{ 16800000, 600000000,  71, 1, 2, 0 }, /* actual: 596.4 MHz */
	{ 19200000, 600000000,  62, 1, 2, 0 }, /* actual: 595.2 MHz */
	{ 26000000, 600000000,  92, 2, 2, 0 }, /* actual: 598.0 MHz */
	{        0,         0,   0, 0, 0, 0 },
};

static struct tegra_clk_pll_params pll_c_params = {
	.input_min = 12000000,
	.input_max = 800000000,
	.cf_min = 12000000,
	.cf_max = 19200000, /* s/w policy, h/w capability 50 MHz */
	.vco_min = 600000000,
	.vco_max = 1400000000,
	.base_reg = PLLC_BASE,
	.misc_reg = PLLC_MISC,
	.lock_mask = PLL_BASE_LOCK,
	.lock_enable_bit_idx = PLLC_MISC_LOCK_ENABLE,
	.lock_delay = 300,
	.iddq_reg = PLLC_MISC,
	.iddq_bit_idx = PLLC_IDDQ_BIT,
	.max_p = PLLXC_SW_MAX_P,
	.dyn_ramp_reg = PLLC_MISC2,
	.stepa_shift = 17,
	.stepb_shift = 9,
	.pdiv_tohw = pllxc_p,
	.div_nmp = &pllxc_nmp,
	.freq_table = pll_c_freq_table,
	.flags = TEGRA_PLL_USE_LOCK | TEGRA_PLL_HAS_LOCK_ENABLE,
};

static struct div_nmp pllcx_nmp = {
	.divm_shift = 0,
	.divm_width = 2,
	.divn_shift = 8,
	.divn_width = 8,
	.divp_shift = 20,
	.divp_width = 3,
};

static const struct pdiv_map pllc_p[] = {
	{ .pdiv =  1, .hw_val = 0 },
	{ .pdiv =  2, .hw_val = 1 },
	{ .pdiv =  3, .hw_val = 2 },
	{ .pdiv =  4, .hw_val = 3 },
	{ .pdiv =  6, .hw_val = 4 },
	{ .pdiv =  8, .hw_val = 5 },
	{ .pdiv = 12, .hw_val = 6 },
	{ .pdiv = 16, .hw_val = 7 },
	{ .pdiv =  0, .hw_val = 0 },
};

static struct tegra_clk_pll_freq_table pll_cx_freq_table[] = {
	{ 12000000, 600000000, 100, 1, 2, 0 },
	{ 13000000, 600000000,  92, 1, 2, 0 }, /* actual: 598.0 MHz */
	{ 16800000, 600000000,  71, 1, 2, 0