1 /*
2 * HDMI PLL
3 *
4 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
9 */
10
11 #define DSS_SUBSYS_NAME "HDMIPLL"
12
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/err.h>
16 #include <linux/io.h>
17 #include <linux/platform_device.h>
18 #include <linux/clk.h>
19 #include <linux/seq_file.h>
20 #include <linux/pm_runtime.h>
21
22 #include "omapdss.h"
23 #include "dss.h"
24 #include "hdmi.h"
25
hdmi_pll_dump(struct hdmi_pll_data * pll,struct seq_file * s)26 void hdmi_pll_dump(struct hdmi_pll_data *pll, struct seq_file *s)
27 {
28 #define DUMPPLL(r) seq_printf(s, "%-35s %08x\n", #r,\
29 hdmi_read_reg(pll->base, r))
30
31 DUMPPLL(PLLCTRL_PLL_CONTROL);
32 DUMPPLL(PLLCTRL_PLL_STATUS);
33 DUMPPLL(PLLCTRL_PLL_GO);
34 DUMPPLL(PLLCTRL_CFG1);
35 DUMPPLL(PLLCTRL_CFG2);
36 DUMPPLL(PLLCTRL_CFG3);
37 DUMPPLL(PLLCTRL_SSC_CFG1);
38 DUMPPLL(PLLCTRL_SSC_CFG2);
39 DUMPPLL(PLLCTRL_CFG4);
40 }
41
hdmi_pll_enable(struct dss_pll * dsspll)42 static int hdmi_pll_enable(struct dss_pll *dsspll)
43 {
44 struct hdmi_pll_data *pll = container_of(dsspll, struct hdmi_pll_data, pll);
45 struct hdmi_wp_data *wp = pll->wp;
46 int r;
47
48 r = pm_runtime_get_sync(&pll->pdev->dev);
49 WARN_ON(r < 0);
50
51 dss_ctrl_pll_enable(dsspll, true);
52
53 r = hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_BOTHON_ALLCLKS);
54 if (r)
55 return r;
56
57 return 0;
58 }
59
hdmi_pll_disable(struct dss_pll * dsspll)60 static void hdmi_pll_disable(struct dss_pll *dsspll)
61 {
62 struct hdmi_pll_data *pll = container_of(dsspll, struct hdmi_pll_data, pll);
63 struct hdmi_wp_data *wp = pll->wp;
64 int r;
65
66 hdmi_wp_set_pll_pwr(wp, HDMI_PLLPWRCMD_ALLOFF);
67
68 dss_ctrl_pll_enable(dsspll, false);
69
70 r = pm_runtime_put_sync(&pll->pdev->dev);
71 WARN_ON(r < 0 && r != -ENOSYS);
72 }
73
74 static const struct dss_pll_ops hdmi_pll_ops = {
75 .enable = hdmi_pll_enable,
76 .disable = hdmi_pll_disable,
77 .set_config = dss_pll_write_config_type_b,
78 };
79
80 static const struct dss_pll_hw dss_omap4_hdmi_pll_hw = {
81 .type = DSS_PLL_TYPE_B,
82
83 .n_max = 255,
84 .m_min = 20,
85 .m_max = 4095,
86 .mX_max = 127,
87 .fint_min = 500000,
88 .fint_max = 2500000,
89
90 .clkdco_min = 500000000,
91 .clkdco_low = 1000000000,
92 .clkdco_max = 2000000000,
93
94 .n_msb = 8,
95 .n_lsb = 1,
96 .m_msb = 20,
97 .m_lsb = 9,
98
99 .mX_msb[0] = 24,
100 .mX_lsb[0] = 18,
101
102 .has_selfreqdco = true,
103 };
104
105 static const struct dss_pll_hw dss_omap5_hdmi_pll_hw = {
106 .type = DSS_PLL_TYPE_B,
107
108 .n_max = 255,
109 .m_min = 20,
110 .m_max = 2045,
111 .mX_max = 127,
112 .fint_min = 620000,
113 .fint_max = 2500000,
114
115 .clkdco_min = 750000000,
116 .clkdco_low = 1500000000,
117 .clkdco_max = 2500000000UL,
118
119 .n_msb = 8,
120 .n_lsb = 1,
121 .m_msb = 20,
122 .m_lsb = 9,
123
124 .mX_msb[0] = 24,
125 .mX_lsb[0] = 18,
126
127 .has_selfreqdco = true,
128 .has_refsel = true,
129 };
130
hdmi_init_pll_data(struct dss_device * dss,struct platform_device * pdev,struct hdmi_pll_data * hpll)131 static int hdmi_init_pll_data(struct dss_device *dss,
132 struct platform_device *pdev,
133 struct hdmi_pll_data *hpll)
134 {
135 struct dss_pll *pll = &hpll->pll;
136 struct clk *clk;
137 int r;
138
139 clk = devm_clk_get(&pdev->dev, "sys_clk");
140 if (IS_ERR(clk)) {
141 DSSERR("can't get sys_clk\n");
142 return PTR_ERR(clk);
143 }
144
145 pll->name = "hdmi";
146 pll->id = DSS_PLL_HDMI;
147 pll->base = hpll->base;
148 pll->clkin = clk;
149
150 if (hpll->wp->version == 4)
151 pll->hw = &dss_omap4_hdmi_pll_hw;
152 else
153 pll->hw = &dss_omap5_hdmi_pll_hw;
154
155 pll->ops = &hdmi_pll_ops;
156
157 r = dss_pll_register(dss, pll);
158 if (r)
159 return r;
160
161 return 0;
162 }
163
hdmi_pll_init(struct dss_device * dss,struct platform_device * pdev,struct hdmi_pll_data * pll,struct hdmi_wp_data * wp)164 int hdmi_pll_init(struct dss_device *dss, struct platform_device *pdev,
165 struct hdmi_pll_data *pll, struct hdmi_wp_data *wp)
166 {
167 int r;
168 struct resource *res;
169
170 pll->pdev = pdev;
171 pll->wp = wp;
172
173 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll");
174 pll->base = devm_ioremap_resource(&pdev->dev, res);
175 if (IS_ERR(pll->base))
176 return PTR_ERR(pll->base);
177
178 r = hdmi_init_pll_data(dss, pdev, pll);
179 if (r) {
180 DSSERR("failed to init HDMI PLL\n");
181 return r;
182 }
183
184 return 0;
185 }
186
hdmi_pll_uninit(struct hdmi_pll_data * hpll)187 void hdmi_pll_uninit(struct hdmi_pll_data *hpll)
188 {
189 struct dss_pll *pll = &hpll->pll;
190
191 dss_pll_unregister(pll);
192 }
193
