linux/drivers/clk/qcom/dispcc-qcm2290.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2020, The Linux Foundation. All rights reserved.
 * Copyright (c) 2021, Linaro Ltd.
 */

#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>

#include <dt-bindings/clock/qcom,dispcc-qcm2290.h>

#include "clk-alpha-pll.h"
#include "clk-branch.h"
#include "clk-rcg.h"
#include "clk-regmap.h"
#include "clk-regmap-divider.h"
#include "common.h"
#include "gdsc.h"
#include "reset.h"

enum {
	P_BI_TCXO,
	P_BI_TCXO_AO,
	P_DISP_CC_PLL0_OUT_MAIN,
	P_DSI0_PHY_PLL_OUT_BYTECLK,
	P_DSI0_PHY_PLL_OUT_DSICLK,
	P_GPLL0_OUT_DIV,
	P_GPLL0_OUT_MAIN,
	P_SLEEP_CLK,
};

static const struct pll_vco spark_vco[] = {
	{ 500000000, 1000000000, 2 },
};

/* 768MHz configuration */
static const struct alpha_pll_config disp_cc_pll0_config = {
	.l = 0x28,
	.alpha = 0x0,
	.alpha_en_mask = BIT(24),
	.vco_val = 0x2 << 20,
	.vco_mask = GENMASK(21, 20),
	.main_output_mask = BIT(0),
	.config_ctl_val = 0x4001055B,
};

static struct clk_alpha_pll disp_cc_pll0 = {
	.offset = 0x0,
	.vco_table = spark_vco,
	.num_vco = ARRAY_SIZE(spark_vco),
	.regs = clk_alpha_pll_regs[CLK_ALPHA_PLL_TYPE_DEFAULT],
	.clkr = {
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_pll0",
			.parent_data = &(const struct clk_parent_data){
				.fw_name = "bi_tcxo",
			},
			.num_parents = 1,
			.ops = &clk_alpha_pll_ops,
		},
	},
};

static const struct parent_map disp_cc_parent_map_0[] = {
	{ P_BI_TCXO, 0 },
	{ P_DSI0_PHY_PLL_OUT_BYTECLK, 1 },
};

static const struct clk_parent_data disp_cc_parent_data_0[] = {
	{ .fw_name = "bi_tcxo" },
	{ .fw_name = "dsi0_phy_pll_out_byteclk" },
};

static const struct parent_map disp_cc_parent_map_1[] = {
	{ P_BI_TCXO, 0 },
};

static const struct clk_parent_data disp_cc_parent_data_1[] = {
	{ .fw_name = "bi_tcxo" },
};

static const struct parent_map disp_cc_parent_map_2[] = {
	{ P_BI_TCXO_AO, 0 },
	{ P_GPLL0_OUT_DIV, 4 },
};

static const struct clk_parent_data disp_cc_parent_data_2[] = {
	{ .fw_name = "bi_tcxo_ao" },
	{ .fw_name = "gcc_disp_gpll0_div_clk_src" },
};

static const struct parent_map disp_cc_parent_map_3[] = {
	{ P_BI_TCXO, 0 },
	{ P_DISP_CC_PLL0_OUT_MAIN, 1 },
	{ P_GPLL0_OUT_MAIN, 4 },
};

static const struct clk_parent_data disp_cc_parent_data_3[] = {
	{ .fw_name = "bi_tcxo" },
	{ .hw = &disp_cc_pll0.clkr.hw },
	{ .fw_name = "gcc_disp_gpll0_clk_src" },
};

static const struct parent_map disp_cc_parent_map_4[] = {
	{ P_BI_TCXO, 0 },
	{ P_DSI0_PHY_PLL_OUT_DSICLK, 1 },
};

static const struct clk_parent_data disp_cc_parent_data_4[] = {
	{ .fw_name = "bi_tcxo" },
	{ .fw_name = "dsi0_phy_pll_out_dsiclk" },
};

static const struct parent_map disp_cc_parent_map_5[] = {
	{ P_SLEEP_CLK, 0 },
};

static const struct clk_parent_data disp_cc_parent_data_5[] = {
	{ .fw_name = "sleep_clk" },
};

static struct clk_rcg2 disp_cc_mdss_byte0_clk_src = {
	.cmd_rcgr = 0x20a4,
	.mnd_width = 0,
	.hid_width = 5,
	.parent_map = disp_cc_parent_map_0,
	.clkr.hw.init = &(struct clk_init_data){
		.name = "disp_cc_mdss_byte0_clk_src",
		.parent_data = disp_cc_parent_data_0,
		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
		/* For set_rate and set_parent to succeed, parent(s) must be enabled */
		.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
		.ops = &clk_byte2_ops,
	},
};

static struct clk_regmap_div disp_cc_mdss_byte0_div_clk_src = {
	.reg = 0x20bc,
	.shift = 0,
	.width = 2,
	.clkr.hw.init = &(struct clk_init_data) {
		.name = "disp_cc_mdss_byte0_div_clk_src",
		.parent_hws = (const struct clk_hw*[]){
			&disp_cc_mdss_byte0_clk_src.clkr.hw,
		},
		.num_parents = 1,
		.ops = &clk_regmap_div_ops,
	},
};

static const struct freq_tbl ftbl_disp_cc_mdss_ahb_clk_src[] = {
	F(19200000, P_BI_TCXO_AO, 1, 0, 0),
	F(37500000, P_GPLL0_OUT_DIV, 8, 0, 0),
	F(75000000, P_GPLL0_OUT_DIV, 4, 0, 0),
	{ }
};

static struct clk_rcg2 disp_cc_mdss_ahb_clk_src = {
	.cmd_rcgr = 0x2154,
	.mnd_width = 0,
	.hid_width = 5,
	.parent_map = disp_cc_parent_map_2,
	.freq_tbl = ftbl_disp_cc_mdss_ahb_clk_src,
	.clkr.hw.init = &(struct clk_init_data){
		.name = "disp_cc_mdss_ahb_clk_src",
		.parent_data = disp_cc_parent_data_2,
		.num_parents = ARRAY_SIZE(disp_cc_parent_data_2),
		.ops = &clk_rcg2_shared_ops,
	},
};

static const struct freq_tbl ftbl_disp_cc_mdss_esc0_clk_src[] = {
	F(19200000, P_BI_TCXO, 1, 0, 0),
	{ }
};

static struct clk_rcg2 disp_cc_mdss_esc0_clk_src = {
	.cmd_rcgr = 0x20c0,
	.mnd_width = 0,
	.hid_width = 5,
	.parent_map = disp_cc_parent_map_0,
	.freq_tbl = ftbl_disp_cc_mdss_esc0_clk_src,
	.clkr.hw.init = &(struct clk_init_data){
		.name = "disp_cc_mdss_esc0_clk_src",
		.parent_data = disp_cc_parent_data_0,
		.num_parents = ARRAY_SIZE(disp_cc_parent_data_0),
		.ops = &clk_rcg2_ops,
	},
};

static const struct freq_tbl ftbl_disp_cc_mdss_mdp_clk_src[] = {
	F(19200000, P_BI_TCXO, 1, 0, 0),
	F(192000000, P_DISP_CC_PLL0_OUT_MAIN, 4, 0, 0),
	F(256000000, P_DISP_CC_PLL0_OUT_MAIN, 3, 0, 0),
	F(307200000, P_DISP_CC_PLL0_OUT_MAIN, 2.5, 0, 0),
	F(384000000, P_DISP_CC_PLL0_OUT_MAIN, 2, 0, 0),
	{ }
};

static struct clk_rcg2 disp_cc_mdss_mdp_clk_src = {
	.cmd_rcgr = 0x2074,
	.mnd_width = 0,
	.hid_width = 5,
	.parent_map = disp_cc_parent_map_3,
	.freq_tbl = ftbl_disp_cc_mdss_mdp_clk_src,
	.clkr.hw.init = &(struct clk_init_data){
		.name = "disp_cc_mdss_mdp_clk_src",
		.parent_data = disp_cc_parent_data_3,
		.num_parents = ARRAY_SIZE(disp_cc_parent_data_3),
		.flags = CLK_SET_RATE_PARENT,
		.ops = &clk_rcg2_shared_ops,
	},
};

static struct clk_rcg2 disp_cc_mdss_pclk0_clk_src = {
	.cmd_rcgr = 0x205c,
	.mnd_width = 8,
	.hid_width = 5,
	.parent_map = disp_cc_parent_map_4,
	.clkr.hw.init = &(struct clk_init_data){
		.name = "disp_cc_mdss_pclk0_clk_src",
		.parent_data = disp_cc_parent_data_4,
		.num_parents = ARRAY_SIZE(disp_cc_parent_data_4),
		/* For set_rate and set_parent to succeed, parent(s) must be enabled */
		.flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
		.ops = &clk_pixel_ops,
	},
};

static struct clk_rcg2 disp_cc_mdss_vsync_clk_src = {
	.cmd_rcgr = 0x208c,
	.mnd_width = 0,
	.hid_width = 5,
	.parent_map = disp_cc_parent_map_1,
	.freq_tbl = ftbl_disp_cc_mdss_esc0_clk_src,
	.clkr.hw.init = &(struct clk_init_data){
		.name = "disp_cc_mdss_vsync_clk_src",
		.parent_data = disp_cc_parent_data_1,
		.num_parents = ARRAY_SIZE(disp_cc_parent_data_1),
		.flags = CLK_SET_RATE_PARENT,
		.ops = &clk_rcg2_shared_ops,
	},
};

static const struct freq_tbl ftbl_disp_cc_sleep_clk_src[] = {
	F(32764, P_SLEEP_CLK, 1, 0, 0),
	{ }
};

static struct clk_rcg2 disp_cc_sleep_clk_src = {
	.cmd_rcgr = 0x6050,
	.mnd_width = 0,
	.hid_width = 5,
	.parent_map = disp_cc_parent_map_5,
	.freq_tbl = ftbl_disp_cc_sleep_clk_src,
	.clkr.hw.init = &(struct clk_init_data){
		.name = "disp_cc_sleep_clk_src",
		.parent_data = disp_cc_parent_data_5,
		.num_parents = ARRAY_SIZE(disp_cc_parent_data_5),
		.ops = &clk_rcg2_ops,
	},
};

static struct clk_branch disp_cc_mdss_ahb_clk = {
	.halt_reg = 0x2044,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x2044,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_mdss_ahb_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_mdss_ahb_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch disp_cc_mdss_byte0_clk = {
	.halt_reg = 0x201c,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x201c,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_mdss_byte0_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_mdss_byte0_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch disp_cc_mdss_byte0_intf_clk = {
	.halt_reg = 0x2020,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x2020,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_mdss_byte0_intf_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_mdss_byte0_div_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch disp_cc_mdss_esc0_clk = {
	.halt_reg = 0x2024,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x2024,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_mdss_esc0_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_mdss_esc0_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch disp_cc_mdss_mdp_clk = {
	.halt_reg = 0x2008,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x2008,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_mdss_mdp_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_mdss_mdp_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch disp_cc_mdss_mdp_lut_clk = {
	.halt_reg = 0x2010,
	.halt_check = BRANCH_HALT_VOTED,
	.clkr = {
		.enable_reg = 0x2010,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_mdss_mdp_lut_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_mdss_mdp_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch disp_cc_mdss_non_gdsc_ahb_clk = {
	.halt_reg = 0x4004,
	.halt_check = BRANCH_HALT_VOTED,
	.clkr = {
		.enable_reg = 0x4004,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_mdss_non_gdsc_ahb_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_mdss_ahb_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch disp_cc_mdss_pclk0_clk = {
	.halt_reg = 0x2004,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x2004,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_mdss_pclk0_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_mdss_pclk0_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch disp_cc_mdss_vsync_clk = {
	.halt_reg = 0x2018,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x2018,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_mdss_vsync_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_mdss_vsync_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static struct clk_branch disp_cc_sleep_clk = {
	.halt_reg = 0x6068,
	.halt_check = BRANCH_HALT,
	.clkr = {
		.enable_reg = 0x6068,
		.enable_mask = BIT(0),
		.hw.init = &(struct clk_init_data){
			.name = "disp_cc_sleep_clk",
			.parent_hws = (const struct clk_hw*[]){
				&disp_cc_sleep_clk_src.clkr.hw,
			},
			.num_parents = 1,
			.flags = CLK_SET_RATE_PARENT,
			.ops = &clk_branch2_ops,
		},
	},
};

static const struct qcom_reset_map disp_cc_qcm2290_resets[] = {
	[DISP_CC_MDSS_CORE_BCR] = { 0x2000 },
};

static struct gdsc mdss_gdsc = {
	.gdscr = 0x3000,
	.pd = {
		.name = "mdss_gdsc",
	},
	.pwrsts = PWRSTS_OFF_ON,
	.flags = HW_CTRL,
};

static struct gdsc *disp_cc_qcm2290_gdscs[] = {
	[MDSS_GDSC] = &mdss_gdsc,
};

static struct clk_regmap *disp_cc_qcm2290_clocks[] = {
	[DISP_CC_MDSS_AHB_CLK] = &disp_cc_mdss_ahb_clk.clkr,
	[DISP_CC_MDSS_AHB_CLK_SRC] = &disp_cc_mdss_ahb_clk_src.clkr,
	[DISP_CC_MDSS_BYTE0_CLK] = &disp_cc_mdss_byte0_clk.clkr,
	[DISP_CC_MDSS_BYTE0_CLK_SRC] = &disp_cc_mdss_byte0_clk_src.clkr,
	[DISP_CC_MDSS_BYTE0_DIV_CLK_SRC] = &disp_cc_mdss_byte0_div_clk_src.clkr,
	[DISP_CC_MDSS_BYTE0_INTF_CLK] = &disp_cc_mdss_byte0_intf_clk.clkr,
	[DISP_CC_MDSS_ESC0_CLK] = &disp_cc_mdss_esc0_clk.clkr,
	[DISP_CC_MDSS_ESC0_CLK_SRC] = &disp_cc_mdss_esc0_clk_src.clkr,
	[DISP_CC_MDSS_MDP_CLK] = &disp_cc_mdss_mdp_clk.clkr,
	[DISP_CC_MDSS_MDP_CLK_SRC] = &disp_cc_mdss_mdp_clk_src.clkr,
	[DISP_CC_MDSS_MDP_LUT_CLK] = &disp_cc_mdss_mdp_lut_clk.clkr,
	[DISP_CC_MDSS_NON_GDSC_AHB_CLK] = &disp_cc_mdss_non_gdsc_ahb_clk.clkr,
	[DISP_CC_MDSS_PCLK0_CLK] = &disp_cc_mdss_pclk0_clk.clkr,
	[DISP_CC_MDSS_PCLK0_CLK_SRC] = &disp_cc_mdss_pclk0_clk_src.clkr,
	[DISP_CC_MDSS_VSYNC_CLK] = &disp_cc_mdss_vsync_clk.clkr,
	[DISP_CC_MDSS_VSYNC_CLK_SRC] = &disp_cc_mdss_vsync_clk_src.clkr,
	[DISP_CC_PLL0] = &disp_cc_pll0.clkr,
	[DISP_CC_SLEEP_CLK] = &disp_cc_sleep_clk.clkr,
	[DISP_CC_SLEEP_CLK_SRC] = &disp_cc_sleep_clk_src.clkr,
};

static const struct regmap_config disp_cc_qcm2290_regmap_config = {
	.reg_bits = 32,
	.reg_stride = 4,
	.val_bits = 32,
	.max_register = 0x10000,
	.fast_io = true,
};

static const struct qcom_cc_desc disp_cc_qcm2290_desc = {
	.config = &disp_cc_qcm2290_regmap_config,
	.clks = disp_cc_qcm2290_clocks,
	.num_clks = ARRAY_SIZE(disp_cc_qcm2290_clocks),
	.gdscs = disp_cc_qcm2290_gdscs,
	.num_gdscs = ARRAY_SIZE(disp_cc_qcm2290_gdscs),
	.resets = disp_cc_qcm2290_resets,
	.num_resets = ARRAY_SIZE(disp_cc_qcm2290_resets),
};

static const struct of_device_id disp_cc_qcm2290_match_table[] = {
	{ .compatible = "qcom,qcm2290-dispcc" },
	{ }
};
MODULE_DEVICE_TABLE(of, disp_cc_qcm2290_match_table);

static int disp_cc_qcm2290_probe(struct platform_device *pdev)
{
	struct regmap *regmap;
	int ret;

	regmap = qcom_cc_map(pdev, &disp_cc_qcm2290_desc);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	clk_alpha_pll_configure(&disp_cc_pll0, regmap, &disp_cc_pll0_config);

	/* Keep DISP_CC_XO_CLK always-ON */
	regmap_update_bits(regmap, 0x604c, BIT(0), BIT(0));

	ret = qcom_cc_really_probe(pdev, &disp_cc_qcm2290_desc, regmap);
	if (ret) {
		dev_err(&pdev->dev, "Failed to register DISP CC clocks\n");
		return ret;
	}

	return ret;
}

static struct platform_driver disp_cc_qcm2290_driver = {
	.probe = disp_cc_qcm2290_probe,
	.driver = {
		.name = "dispcc-qcm2290",
		.of_match_table = disp_cc_qcm2290_match_table,
	},
};

static int __init disp_cc_qcm2290_init(void)
{
	return platform_driver_register(&disp_cc_qcm2290_driver);
}
subsys_initcall(disp_cc_qcm2290_init);

static void __exit disp_cc_qcm2290_exit(void)
{
	platform_driver_unregister(&disp_cc_qcm2290_driver);
}
module_exit(disp_cc_qcm2290_exit);

MODULE_DESCRIPTION("QTI DISP_CC qcm2290 Driver");
MODULE_LICENSE("GPL v2");