1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * HDMI PLL
4  *
5  * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/
6  */
7 
8 #define DSS_SUBSYS_NAME "HDMIPLL"
9 
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/err.h>
13 #include <linux/io.h>
14 #include <linux/platform_device.h>
15 #include <linux/clk.h>
16 #include <linux/seq_file.h>
17 #include <linux/pm_runtime.h>
18 
19 #include "omapdss.h"
20 #include "dss.h"
21 #include "hdmi.h"
22 
hdmi_pll_dump(struct hdmi_pll_data * pll,struct seq_file * s)23 void hdmi_pll_dump(struct hdmi_pll_data *pll, struct seq_file *s)
24 {
25 #define DUMPPLL(r) seq_printf(s, "%-35s %08x\n", #r,\
26 		hdmi_read_reg(pll->base, r))
27 
28 	DUMPPLL(PLLCTRL_PLL_CONTROL);
29 	DUMPPLL(PLLCTRL_PLL_STATUS);
30 	DUMPPLL(PLLCTRL_PLL_GO);
31 	DUMPPLL(PLLCTRL_CFG1);
32 	DUMPPLL(PLLCTRL_CFG2);
33 	DUMPPLL(PLLCTRL_CFG3);
34 	DUMPPLL(PLLCTRL_SSC_CFG1);
35 	DUMPPLL(PLLCTRL_SSC_CFG2);
36 	DUMPPLL(PLLCTRL_CFG4);
37 }
38 
hdmi_pll_enable(struct dss_pll * dsspll)39 static int hdmi_pll_enable(struct dss_pll *dsspll)
40 {
41 	struct hdmi_pll_data *pll = container_of(dsspll, struct hdmi_pll_data, pll);
42 	struct hdmi_wp_data *wp = pll->wp;
43 	int r;
44 
45 	r = pm_runtime_get_sync(&pll->pdev->dev);
46 	WARN_ON(r < 0);
47 
48 	dss_ctrl_pll_enable(dsspll, true);
49 
50 	r = hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_BOTHON_ALLCLKS);
51 	if (r)
52 		return r;
53 
54 	return 0;
55 }
56 
hdmi_pll_disable(struct dss_pll * dsspll)57 static void hdmi_pll_disable(struct dss_pll *dsspll)
58 {
59 	struct hdmi_pll_data *pll = container_of(dsspll, struct hdmi_pll_data, pll);
60 	struct hdmi_wp_data *wp = pll->wp;
61 	int r;
62 
63 	hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_ALLOFF);
64 
65 	dss_ctrl_pll_enable(dsspll, false);
66 
67 	r = pm_runtime_put_sync(&pll->pdev->dev);
68 	WARN_ON(r < 0 && r != -ENOSYS);
69 }
70 
71 static const struct dss_pll_ops hdmi_pll_ops = {
72 	.enable = hdmi_pll_enable,
73 	.disable = hdmi_pll_disable,
74 	.set_config = dss_pll_write_config_type_b,
75 };
76 
77 static const struct dss_pll_hw dss_omap4_hdmi_pll_hw = {
78 	.type = DSS_PLL_TYPE_B,
79 
80 	.n_max = 255,
81 	.m_min = 20,
82 	.m_max = 4095,
83 	.mX_max = 127,
84 	.fint_min = 500000,
85 	.fint_max = 2500000,
86 
87 	.clkdco_min = 500000000,
88 	.clkdco_low = 1000000000,
89 	.clkdco_max = 2000000000,
90 
91 	.n_msb = 8,
92 	.n_lsb = 1,
93 	.m_msb = 20,
94 	.m_lsb = 9,
95 
96 	.mX_msb[0] = 24,
97 	.mX_lsb[0] = 18,
98 
99 	.has_selfreqdco = true,
100 };
101 
102 static const struct dss_pll_hw dss_omap5_hdmi_pll_hw = {
103 	.type = DSS_PLL_TYPE_B,
104 
105 	.n_max = 255,
106 	.m_min = 20,
107 	.m_max = 2045,
108 	.mX_max = 127,
109 	.fint_min = 620000,
110 	.fint_max = 2500000,
111 
112 	.clkdco_min = 750000000,
113 	.clkdco_low = 1500000000,
114 	.clkdco_max = 2500000000UL,
115 
116 	.n_msb = 8,
117 	.n_lsb = 1,
118 	.m_msb = 20,
119 	.m_lsb = 9,
120 
121 	.mX_msb[0] = 24,
122 	.mX_lsb[0] = 18,
123 
124 	.has_selfreqdco = true,
125 	.has_refsel = true,
126 };
127 
hdmi_init_pll_data(struct dss_device * dss,struct platform_device * pdev,struct hdmi_pll_data * hpll)128 static int hdmi_init_pll_data(struct dss_device *dss,
129 			      struct platform_device *pdev,
130 			      struct hdmi_pll_data *hpll)
131 {
132 	struct dss_pll *pll = &hpll->pll;
133 	struct clk *clk;
134 	int r;
135 
136 	clk = devm_clk_get(&pdev->dev, "sys_clk");
137 	if (IS_ERR(clk)) {
138 		DSSERR("can't get sys_clk\n");
139 		return PTR_ERR(clk);
140 	}
141 
142 	pll->name = "hdmi";
143 	pll->id = DSS_PLL_HDMI;
144 	pll->base = hpll->base;
145 	pll->clkin = clk;
146 
147 	if (hpll->wp->version == 4)
148 		pll->hw = &dss_omap4_hdmi_pll_hw;
149 	else
150 		pll->hw = &dss_omap5_hdmi_pll_hw;
151 
152 	pll->ops = &hdmi_pll_ops;
153 
154 	r = dss_pll_register(dss, pll);
155 	if (r)
156 		return r;
157 
158 	return 0;
159 }
160 
hdmi_pll_init(struct dss_device * dss,struct platform_device * pdev,struct hdmi_pll_data * pll,struct hdmi_wp_data * wp)161 int hdmi_pll_init(struct dss_device *dss, struct platform_device *pdev,
162 		  struct hdmi_pll_data *pll, struct hdmi_wp_data *wp)
163 {
164 	int r;
165 
166 	pll->pdev = pdev;
167 	pll->wp = wp;
168 
169 	pll->base = devm_platform_ioremap_resource_byname(pdev, "pll");
170 	if (IS_ERR(pll->base))
171 		return PTR_ERR(pll->base);
172 
173 	r = hdmi_init_pll_data(dss, pdev, pll);
174 	if (r) {
175 		DSSERR("failed to init HDMI PLL\n");
176 		return r;
177 	}
178 
179 	return 0;
180 }
181 
hdmi_pll_uninit(struct hdmi_pll_data * hpll)182 void hdmi_pll_uninit(struct hdmi_pll_data *hpll)
183 {
184 	struct dss_pll *pll = &hpll->pll;
185 
186 	dss_pll_unregister(pll);
187 }
188