Rtwo/kernel/motorola/sm8550/drivers/clk/qcom/gpucc-sm8150.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
 * Copyright (c) 2022, 2024 Qualcomm Innovation Center, Inc. All rights reserved.
 */

#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#include <dt-bindings/clock/qcom,gpucc-sm8150.h>

#include "common.h"
#include "clk-alpha-pll.h"
#include "clk-branch.h"
#include "clk-pll.h"
#include "clk-rcg.h"
#include "clk-regmap.h"
#include "reset.h"
#include "gdsc.h"
#include "vdd-level-sm8150.h"
#include "clk-pm.h"

static DEFINE_VDD_REGULATORS(vdd_cx, VDD_HIGH_L1 + 1, 1, vdd_corner);
static DEFINE_VDD_REGULATORS(vdd_mx, VDD_NOMINAL + 1, 1, vdd_corner);

static struct clk_vdd_class *gpu_cc_sm8150_regulators[] = {
	&vdd_cx,
	&vdd_mx,
};

enum {
	P_BI_TCXO,
	P_GPLL0_OUT_MAIN,
	P_GPLL0_OUT_MAIN_DIV,
	P_GPU_CC_PLL1_OUT_MAIN,
};

static const struct pll_vco trion_vco[] = {
	{ 249600000, 2000000000, 0 },
};

/* 500MHz configuration */
static struct alpha_pll_config gpu_cc_pll1_config = {
	.l = 0x1a,
	.alpha = 0xaaa,
	.config_ctl_val = 0x20485699,
	.config_ctl_hi_val = 0x00002267,
	.config_ctl_hi1_val = 0x00000024,
	.test_ctl_val = 0x00000000,
	.test_ctl_hi_val = 0x00000000,
	.test_ctl_hi1_val = 0x00000020,
	.user_ctl_val = 0x00000000,
	.user_ctl_hi_val = 0x00000805,
	.user_ctl_hi1_val = 0x000000d0,
};

static struct clk_alpha_pll gpu_cc_pll1 = {
	.offset = 0x100,
	.vco_table = trion_vco,
	.num_vco = ARRAY_SIZE(trion_vco),
	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_TRION],
	.config = &gpu_cc_pll1_config,
	.clkr = {
		.hw.init = &(struct clk_init_data){
			.name = "gpu_cc_pll1",
			.parent_data =  &(const struct clk_parent_data){
				.fw_name = "bi_tcxo",
			},
			.num_parents = 1,
			.ops = &clk_alpha_pll_trion_ops,
		},
		.vdd_data = {
			.vdd_class = &vdd_mx,
			.num_rate_max = VDD_NUM,
			.rate_max = (unsigned long[VDD_NUM]) {
				[VDD_MIN] = 615000000,
				[VDD_LOW] = 1066000000,
				[VDD_LOW_L1] = 1600000000,
				[VDD_NOMINAL] = 2000000000},
		},
	},
};

static const struct parent_map gpu_cc_parent_map_0[] = {
	{ P_BI_TCXO, 0 },
	{ P_GPU_CC_PLL1_OUT_MAIN, 3 },
	{ P_GPLL0_OUT_MAIN, 5 },
	{ P_GPLL0_OUT_MAIN_DIV, 6 },
};

static const struct clk_parent_data gpu_cc_parent_data_0[] = {
	{ .fw_name = "bi_tcxo" },
	{ .hw = &gpu_cc_pll1.clkr.hw },
	{ .fw_name = "gcc_gpu_gpll0_clk_src" },
	{ .fw_name = "gcc_gpu_gpll0_div_clk_src" },
};

static const struct freq_tbl ftbl_gpu_cc_gmu_clk_src[] = {
	F(19200000, P_BI_TCXO, 1, 0, 0),
	F(200000000, P_GPLL0_OUT_MAIN_DIV, 1.5, 0, 0),
	F(500000000, P_GPU_CC_PLL1_OUT_MAIN, 1, 0, 0),
	{ }
};

static const struct freq_tbl ftbl_gpu_cc_gmu_clk_src_sc8180x[] = {
	F(19200000, P_BI_TCXO, 1, 0, 0),
	F(200000000, P_GPLL0_OUT_MAIN_DIV, 1.5, 0, 0),
	F(400000000, P_GPLL0_OUT_MAIN, 1.5, 0, 0),
	F(500000000, P_GPU_CC_PLL1_OUT_MAIN, 1, 0, 0),
	{ }
};

static struct clk_rcg2 gpu_cc_gmu_clk_src = {
	.cmd_rcgr = 0x1120,
	.mnd_width = 0,
	.hid_width = 5,
	.parent_map = gpu_cc_parent_map_0,
	.freq_tbl = ftbl_gpu_cc_gmu_clk_src,
	.enable_safe_config = true,
	.clkr.hw.init = &(struct clk_init_data){
		.name = "gpu_cc_gmu_clk_src",
		.parent_data = gpu_cc_parent_data_0,
		.num_parents = ARRAY_SIZE(gpu_cc_parent_data_0),
		.ops = &clk_rcg2_ops,
	},
	.clkr.vdd_data = {
		.vdd_class = &vdd_cx,
		.num_rate_max = VDD_NUM,
		.rate_max = (unsigned long[VDD_NUM]) {
			[VDD_MIN] = 200000000,
			[VDD_LOW] = 500000000},
	},
};

static struct clk_branch gpu_cc_crc_ahb_clk = {
	.halt_reg = 0x107c,
	.halt_check = BRANCH_HALT_VOTED,
	.clkr = {
		.enable_reg = 0x107c,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "gpu_cc_crc_ahb_clk",
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch gpu_cc_cx_gmu_clk = {
	.halt_reg = 0x1098,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x1098,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "gpu_cc_cx_gmu_clk",
			.parent_hws = (const struct clk_hw*[]){
				&gpu_cc_gmu_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch gpu_cc_cx_snoc_dvm_clk = {
	.halt_reg = 0x108c,
	.halt_check = BRANCH_HALT_VOTED,
	.clkr = {
		.enable_reg = 0x108c,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "gpu_cc_cx_snoc_dvm_clk",
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch gpu_cc_cxo_aon_clk = {
	.halt_reg = 0x1004,
	.halt_check = BRANCH_HALT_VOTED,
	.clkr = {
		.enable_reg = 0x1004,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "gpu_cc_cxo_aon_clk",
			.ops = &clk_branch2_ops,
		},
	},
};

/* CLK_DONT_HOLD_STATE flag is needed due to sync_state */
static struct clk_branch gpu_cc_cxo_clk = {
	.halt_reg = 0x109c,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x109c,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "gpu_cc_cxo_clk",
			.flags = CLK_DONT_HOLD_STATE,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch gpu_cc_gx_gmu_clk = {
	.halt_reg = 0x1064,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x1064,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "gpu_cc_gx_gmu_clk",
			.parent_hws = (const struct clk_hw*[]){
				&gpu_cc_gmu_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch gpu_cc_sleep_clk = {
	.halt_reg = 0x1090,
	.halt_check = BRANCH_HALT_VOTED,
	.clkr = {
		.enable_reg = 0x1090,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "gpu_cc_sleep_clk",
			.ops = &clk_branch2_ops,
		},
	},
};

static struct gdsc gpu_cx_gdsc = {
	.gdscr = 0x106c,
	.gds_hw_ctrl = 0x1540,
	.pd = {
		.name = "gpu_cx_gdsc",
	},
	.pwrsts = PWRSTS_OFF_ON,
	.flags = VOTABLE,
};

static struct gdsc gpu_gx_gdsc = {
	.gdscr = 0x100c,
	.clamp_io_ctrl = 0x1508,
	.pd = {
		.name = "gpu_gx_gdsc",
		.power_on = gdsc_gx_do_nothing_enable,
	},
	.pwrsts = PWRSTS_OFF_ON,
	.flags = CLAMP_IO | AON_RESET | POLL_CFG_GDSCR,
};

static struct critical_clk_offset critical_clk_list[] = {
	{ .offset = 0x1078,  .mask = BIT(0) },
};

static struct clk_regmap *gpu_cc_sm8150_clocks[] = {
	[GPU_CC_CRC_AHB_CLK] = &gpu_cc_crc_ahb_clk.clkr,
	[GPU_CC_CX_GMU_CLK] = &gpu_cc_cx_gmu_clk.clkr,
	[GPU_CC_CX_SNOC_DVM_CLK] = &gpu_cc_cx_snoc_dvm_clk.clkr,
	[GPU_CC_CXO_AON_CLK] = &gpu_cc_cxo_aon_clk.clkr,
	[GPU_CC_CXO_CLK] = &gpu_cc_cxo_clk.clkr,
	[GPU_CC_GMU_CLK_SRC] = &gpu_cc_gmu_clk_src.clkr,
	[GPU_CC_GX_GMU_CLK] = &gpu_cc_gx_gmu_clk.clkr,
	[GPU_CC_PLL1] = &gpu_cc_pll1.clkr,
	[GPU_CC_SLEEP_CLK] = &gpu_cc_sleep_clk.clkr,
};

static const struct qcom_reset_map gpu_cc_sm8150_resets[] = {
	[GPUCC_GPU_CC_CX_BCR] = { 0x1068 },
	[GPUCC_GPU_CC_GMU_BCR] = { 0x111c },
	[GPUCC_GPU_CC_GX_BCR] = { 0x1008 },
	[GPUCC_GPU_CC_SPDM_BCR] = { 0x1110 },
	[GPUCC_GPU_CC_XO_BCR] = { 0x1000 },
};

static struct gdsc *gpu_cc_sm8150_gdscs[] = {
	[GPU_CX_GDSC] = &gpu_cx_gdsc,
	[GPU_GX_GDSC] = &gpu_gx_gdsc,
};

static const struct regmap_config gpu_cc_sm8150_regmap_config = {
	.reg_bits	= 32,
	.reg_stride	= 4,
	.val_bits	= 32,
	.max_register	= 0x8008,
	.fast_io	= true,
};

static struct qcom_cc_desc gpu_cc_sm8150_desc = {
	.config = &gpu_cc_sm8150_regmap_config,
	.clks = gpu_cc_sm8150_clocks,
	.num_clks = ARRAY_SIZE(gpu_cc_sm8150_clocks),
	.resets = gpu_cc_sm8150_resets,
	.num_resets = ARRAY_SIZE(gpu_cc_sm8150_resets),
	.clk_regulators = gpu_cc_sm8150_regulators,
	.num_clk_regulators = ARRAY_SIZE(gpu_cc_sm8150_regulators),
	.gdscs = gpu_cc_sm8150_gdscs,
	.num_gdscs = ARRAY_SIZE(gpu_cc_sm8150_gdscs),
	.critical_clk_en = critical_clk_list,
	.num_critical_clk = ARRAY_SIZE(critical_clk_list),

};

static const struct of_device_id gpu_cc_sm8150_match_table[] = {
	{ .compatible = "qcom,sc8180x-gpucc" },
	{ .compatible = "qcom,sm8150-gpucc" },
	{ .compatible = "qcom,sa8155-gpucc" },
	{ }
};
MODULE_DEVICE_TABLE(of, gpu_cc_sm8150_match_table);

static void gpu_cc_sm8150_fixup_scshrike(void)
{
	gpu_cc_gmu_clk_src.freq_tbl = ftbl_gpu_cc_gmu_clk_src_sc8180x;
	gpu_cc_gmu_clk_src.clkr.vdd_data.rate_max[VDD_LOW] = 400000000;
	gpu_cc_gmu_clk_src.clkr.vdd_data.rate_max[VDD_LOW_L1] = 500000000;
}

static int gpu_cc_sm8150_fixup(struct platform_device *pdev)
{
	const char *compat = NULL;
	int compatlen = 0;

	compat = of_get_property(pdev->dev.of_node, "compatible", &compatlen);
	if (!compat || (compatlen <= 0))
		return -EINVAL;

	if (!strcmp(compat, "qcom,sc8180x-gpucc"))
		gpu_cc_sm8150_fixup_scshrike();

	return 0;
}

static int gpu_cc_sm8150_probe(struct platform_device *pdev)
{
	struct regmap *regmap;
	int ret;

	regmap = qcom_cc_map(pdev, &gpu_cc_sm8150_desc);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	ret = gpu_cc_sm8150_fixup(pdev);
	if (ret)
		return ret;

	clk_trion_pll_configure(&gpu_cc_pll1, regmap, gpu_cc_pll1.config);

	/*
	 * Keep clocks always enabled:
	 * GPU_CC_AHB_CLK.
	 */
	regmap_update_bits(regmap, 0x1078, BIT(0), BIT(0));

	gpu_cc_sm8150_desc.gdscs = NULL;
	gpu_cc_sm8150_desc.num_gdscs = 0;

	ret = qcom_cc_really_probe(pdev, &gpu_cc_sm8150_desc, regmap);
	if (ret) {
		dev_err(&pdev->dev, "Failed to register GPU CC clocks\n");
		return ret;
	}

	ret = register_qcom_clks_pm(pdev, false, &gpu_cc_sm8150_desc);
	if (ret)
		dev_err(&pdev->dev, "Failed to register for pm ops\n");

	regmap_update_bits(regmap, gpu_cc_cx_gmu_clk.clkr.enable_reg, 0xFF0, 0xFF0);

	dev_info(&pdev->dev, "Registered GPU CC clocks\n");

	return ret;
}

static void gpu_cc_sm8150_sync_state(struct device *dev)
{
	qcom_cc_sync_state(dev, &gpu_cc_sm8150_desc);
}

static struct platform_driver gpu_cc_sm8150_driver = {
	.probe = gpu_cc_sm8150_probe,
	.driver = {
		.name = "sm8150-gpucc",
		.of_match_table = gpu_cc_sm8150_match_table,
		.sync_state = gpu_cc_sm8150_sync_state,
	},
};

static int __init gpu_cc_sm8150_init(void)
{
	return platform_driver_register(&gpu_cc_sm8150_driver);
}
subsys_initcall(gpu_cc_sm8150_init);

static void __exit gpu_cc_sm8150_exit(void)
{
	platform_driver_unregister(&gpu_cc_sm8150_driver);
}
module_exit(gpu_cc_sm8150_exit);

MODULE_DESCRIPTION("QTI GPUCC SM8150 Driver");
MODULE_LICENSE("GPL v2");