tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * HDMI PLL
3 *
4 * Copyright (C) 2013 Texas Instruments Incorporated
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
26void 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
42static 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(DSS_PLL_HDMI, 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
60static 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(DSS_PLL_HDMI, false);
69
70 r = pm_runtime_put_sync(&pll->pdev->dev);
71 WARN_ON(r < 0 && r != -ENOSYS);
72}
73
74static const struct dss_pll_ops dsi_pll_ops = {
75 .enable = hdmi_pll_enable,
76 .disable = hdmi_pll_disable,
77 .set_config = dss_pll_write_config_type_b,
78};
79
80static 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
105static 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
131static int dsi_init_pll_data(struct platform_device *pdev, struct hdmi_pll_data *hpll)
132{
133 struct dss_pll *pll = &hpll->pll;
134 struct clk *clk;
135 int r;
136
137 clk = devm_clk_get(&pdev->dev, "sys_clk");
138 if (IS_ERR(clk)) {
139 DSSERR("can't get sys_clk\n");
140 return PTR_ERR(clk);
141 }
142
143 pll->name = "hdmi";
144 pll->id = DSS_PLL_HDMI;
145 pll->base = hpll->base;
146 pll->clkin = clk;
147
148 switch (omapdss_get_version()) {
149 case OMAPDSS_VER_OMAP4430_ES1:
150 case OMAPDSS_VER_OMAP4430_ES2:
151 case OMAPDSS_VER_OMAP4:
152 pll->hw = &dss_omap4_hdmi_pll_hw;
153 break;
154
155 case OMAPDSS_VER_OMAP5:
156 case OMAPDSS_VER_DRA7xx:
157 pll->hw = &dss_omap5_hdmi_pll_hw;
158 break;
159
160 default:
161 return -ENODEV;
162 }
163
164 pll->ops = &dsi_pll_ops;
165
166 r = dss_pll_register(pll);
167 if (r)
168 return r;
169
170 return 0;
171}
172
173int hdmi_pll_init(struct platform_device *pdev, struct hdmi_pll_data *pll,
174 struct hdmi_wp_data *wp)
175{
176 int r;
177 struct resource *res;
178
179 pll->pdev = pdev;
180 pll->wp = wp;
181
182 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll");
183 if (!res) {
184 DSSERR("can't get PLL mem resource\n");
185 return -EINVAL;
186 }
187
188 pll->base = devm_ioremap_resource(&pdev->dev, res);
189 if (IS_ERR(pll->base)) {
190 DSSERR("can't ioremap PLLCTRL\n");
191 return PTR_ERR(pll->base);
192 }
193
194 r = dsi_init_pll_data(pdev, pll);
195 if (r) {
196 DSSERR("failed to init HDMI PLL\n");
197 return r;
198 }
199
200 return 0;
201}
202
203void hdmi_pll_uninit(struct hdmi_pll_data *hpll)
204{
205 struct dss_pll *pll = &hpll->pll;
206
207 dss_pll_unregister(pll);
208}