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1/*
2* Copyright (C) 2014 Texas Instruments Ltd
3*
4* This program is free software; you can redistribute it and/or modify it
5* under the terms of the GNU General Public License version 2 as published by
6* the Free Software Foundation.
7*
8* You should have received a copy of the GNU General Public License along with
9* this program. If not, see <http://www.gnu.org/licenses/>.
10*/
11
12#include <linux/clk.h>
13#include <linux/delay.h>
14#include <linux/err.h>
15#include <linux/io.h>
16#include <linux/kernel.h>
17#include <linux/platform_device.h>
18#include <linux/sched.h>
19
20#include <video/omapdss.h>
21
22#include "dss.h"
23#include "dss_features.h"
24
25struct dss_video_pll {
26 struct dss_pll pll;
27
28 struct device *dev;
29
30 void __iomem *clkctrl_base;
31};
32
33#define REG_MOD(reg, val, start, end) \
34 writel_relaxed(FLD_MOD(readl_relaxed(reg), val, start, end), reg)
35
36static void dss_dpll_enable_scp_clk(struct dss_video_pll *vpll)
37{
38 REG_MOD(vpll->clkctrl_base, 1, 14, 14); /* CIO_CLK_ICG */
39}
40
41static void dss_dpll_disable_scp_clk(struct dss_video_pll *vpll)
42{
43 REG_MOD(vpll->clkctrl_base, 0, 14, 14); /* CIO_CLK_ICG */
44}
45
46static void dss_dpll_power_enable(struct dss_video_pll *vpll)
47{
48 REG_MOD(vpll->clkctrl_base, 2, 31, 30); /* PLL_POWER_ON_ALL */
49
50 /*
51 * DRA7x PLL CTRL's PLL_PWR_STATUS seems to always return 0,
52 * so we have to use fixed delay here.
53 */
54 msleep(1);
55}
56
57static void dss_dpll_power_disable(struct dss_video_pll *vpll)
58{
59 REG_MOD(vpll->clkctrl_base, 0, 31, 30); /* PLL_POWER_OFF */
60}
61
62static int dss_video_pll_enable(struct dss_pll *pll)
63{
64 struct dss_video_pll *vpll = container_of(pll, struct dss_video_pll, pll);
65 int r;
66
67 r = dss_runtime_get();
68 if (r)
69 return r;
70
71 dss_ctrl_pll_enable(pll->id, true);
72
73 dss_dpll_enable_scp_clk(vpll);
74
75 r = dss_pll_wait_reset_done(pll);
76 if (r)
77 goto err_reset;
78
79 dss_dpll_power_enable(vpll);
80
81 return 0;
82
83err_reset:
84 dss_dpll_disable_scp_clk(vpll);
85 dss_ctrl_pll_enable(pll->id, false);
86 dss_runtime_put();
87
88 return r;
89}
90
91static void dss_video_pll_disable(struct dss_pll *pll)
92{
93 struct dss_video_pll *vpll = container_of(pll, struct dss_video_pll, pll);
94
95 dss_dpll_power_disable(vpll);
96
97 dss_dpll_disable_scp_clk(vpll);
98
99 dss_ctrl_pll_enable(pll->id, false);
100
101 dss_runtime_put();
102}
103
104static const struct dss_pll_ops dss_pll_ops = {
105 .enable = dss_video_pll_enable,
106 .disable = dss_video_pll_disable,
107 .set_config = dss_pll_write_config_type_a,
108};
109
110static const struct dss_pll_hw dss_dra7_video_pll_hw = {
111 .n_max = (1 << 8) - 1,
112 .m_max = (1 << 12) - 1,
113 .mX_max = (1 << 5) - 1,
114 .fint_min = 500000,
115 .fint_max = 2500000,
116 .clkdco_max = 1800000000,
117
118 .n_msb = 8,
119 .n_lsb = 1,
120 .m_msb = 20,
121 .m_lsb = 9,
122
123 .mX_msb[0] = 25,
124 .mX_lsb[0] = 21,
125 .mX_msb[1] = 30,
126 .mX_lsb[1] = 26,
127
128 .has_refsel = true,
129};
130
131struct dss_pll *dss_video_pll_init(struct platform_device *pdev, int id,
132 struct regulator *regulator)
133{
134 const char * const reg_name[] = { "pll1", "pll2" };
135 const char * const clkctrl_name[] = { "pll1_clkctrl", "pll2_clkctrl" };
136 const char * const clkin_name[] = { "video1_clk", "video2_clk" };
137
138 struct resource *res;
139 struct dss_video_pll *vpll;
140 void __iomem *pll_base, *clkctrl_base;
141 struct clk *clk;
142 struct dss_pll *pll;
143 int r;
144
145 /* PLL CONTROL */
146
147 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, reg_name[id]);
148 if (!res) {
149 dev_err(&pdev->dev,
150 "missing platform resource data for pll%d\n", id);
151 return ERR_PTR(-ENODEV);
152 }
153
154 pll_base = devm_ioremap_resource(&pdev->dev, res);
155 if (IS_ERR(pll_base)) {
156 dev_err(&pdev->dev, "failed to ioremap pll%d reg_name\n", id);
157 return ERR_CAST(pll_base);
158 }
159
160 /* CLOCK CONTROL */
161
162 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
163 clkctrl_name[id]);
164 if (!res) {
165 dev_err(&pdev->dev,
166 "missing platform resource data for pll%d\n", id);
167 return ERR_PTR(-ENODEV);
168 }
169
170 clkctrl_base = devm_ioremap_resource(&pdev->dev, res);
171 if (IS_ERR(clkctrl_base)) {
172 dev_err(&pdev->dev, "failed to ioremap pll%d clkctrl\n", id);
173 return ERR_CAST(clkctrl_base);
174 }
175
176 /* CLKIN */
177
178 clk = devm_clk_get(&pdev->dev, clkin_name[id]);
179 if (IS_ERR(clk)) {
180 DSSERR("can't get video pll clkin\n");
181 return ERR_CAST(clk);
182 }
183
184 vpll = devm_kzalloc(&pdev->dev, sizeof(*vpll), GFP_KERNEL);
185 if (!vpll)
186 return ERR_PTR(-ENOMEM);
187
188 vpll->dev = &pdev->dev;
189 vpll->clkctrl_base = clkctrl_base;
190
191 pll = &vpll->pll;
192
193 pll->name = id == 0 ? "video0" : "video1";
194 pll->id = id == 0 ? DSS_PLL_VIDEO1 : DSS_PLL_VIDEO2;
195 pll->clkin = clk;
196 pll->regulator = regulator;
197 pll->base = pll_base;
198 pll->hw = &dss_dra7_video_pll_hw;
199 pll->ops = &dss_pll_ops;
200
201 r = dss_pll_register(pll);
202 if (r)
203 return ERR_PTR(r);
204
205 return pll;
206}
207
208void dss_video_pll_uninit(struct dss_pll *pll)
209{
210 dss_pll_unregister(pll);
211}
1/*
2 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 */
13
14#include <linux/clk.h>
15#include <linux/delay.h>
16#include <linux/err.h>
17#include <linux/io.h>
18#include <linux/kernel.h>
19#include <linux/platform_device.h>
20#include <linux/sched.h>
21
22#include "omapdss.h"
23#include "dss.h"
24
25struct dss_video_pll {
26 struct dss_pll pll;
27
28 struct device *dev;
29
30 void __iomem *clkctrl_base;
31};
32
33#define REG_MOD(reg, val, start, end) \
34 writel_relaxed(FLD_MOD(readl_relaxed(reg), val, start, end), reg)
35
36static void dss_dpll_enable_scp_clk(struct dss_video_pll *vpll)
37{
38 REG_MOD(vpll->clkctrl_base, 1, 14, 14); /* CIO_CLK_ICG */
39}
40
41static void dss_dpll_disable_scp_clk(struct dss_video_pll *vpll)
42{
43 REG_MOD(vpll->clkctrl_base, 0, 14, 14); /* CIO_CLK_ICG */
44}
45
46static void dss_dpll_power_enable(struct dss_video_pll *vpll)
47{
48 REG_MOD(vpll->clkctrl_base, 2, 31, 30); /* PLL_POWER_ON_ALL */
49
50 /*
51 * DRA7x PLL CTRL's PLL_PWR_STATUS seems to always return 0,
52 * so we have to use fixed delay here.
53 */
54 msleep(1);
55}
56
57static void dss_dpll_power_disable(struct dss_video_pll *vpll)
58{
59 REG_MOD(vpll->clkctrl_base, 0, 31, 30); /* PLL_POWER_OFF */
60}
61
62static int dss_video_pll_enable(struct dss_pll *pll)
63{
64 struct dss_video_pll *vpll = container_of(pll, struct dss_video_pll, pll);
65 int r;
66
67 r = dss_runtime_get(pll->dss);
68 if (r)
69 return r;
70
71 dss_ctrl_pll_enable(pll, true);
72
73 dss_dpll_enable_scp_clk(vpll);
74
75 r = dss_pll_wait_reset_done(pll);
76 if (r)
77 goto err_reset;
78
79 dss_dpll_power_enable(vpll);
80
81 return 0;
82
83err_reset:
84 dss_dpll_disable_scp_clk(vpll);
85 dss_ctrl_pll_enable(pll, false);
86 dss_runtime_put(pll->dss);
87
88 return r;
89}
90
91static void dss_video_pll_disable(struct dss_pll *pll)
92{
93 struct dss_video_pll *vpll = container_of(pll, struct dss_video_pll, pll);
94
95 dss_dpll_power_disable(vpll);
96
97 dss_dpll_disable_scp_clk(vpll);
98
99 dss_ctrl_pll_enable(pll, false);
100
101 dss_runtime_put(pll->dss);
102}
103
104static const struct dss_pll_ops dss_pll_ops = {
105 .enable = dss_video_pll_enable,
106 .disable = dss_video_pll_disable,
107 .set_config = dss_pll_write_config_type_a,
108};
109
110static const struct dss_pll_hw dss_dra7_video_pll_hw = {
111 .type = DSS_PLL_TYPE_A,
112
113 .n_max = (1 << 8) - 1,
114 .m_max = (1 << 12) - 1,
115 .mX_max = (1 << 5) - 1,
116 .fint_min = 500000,
117 .fint_max = 2500000,
118 .clkdco_max = 1800000000,
119
120 .n_msb = 8,
121 .n_lsb = 1,
122 .m_msb = 20,
123 .m_lsb = 9,
124
125 .mX_msb[0] = 25,
126 .mX_lsb[0] = 21,
127 .mX_msb[1] = 30,
128 .mX_lsb[1] = 26,
129 .mX_msb[2] = 4,
130 .mX_lsb[2] = 0,
131 .mX_msb[3] = 9,
132 .mX_lsb[3] = 5,
133
134 .has_refsel = true,
135
136 .errata_i886 = true,
137};
138
139struct dss_pll *dss_video_pll_init(struct dss_device *dss,
140 struct platform_device *pdev, int id,
141 struct regulator *regulator)
142{
143 const char * const reg_name[] = { "pll1", "pll2" };
144 const char * const clkctrl_name[] = { "pll1_clkctrl", "pll2_clkctrl" };
145 const char * const clkin_name[] = { "video1_clk", "video2_clk" };
146
147 struct resource *res;
148 struct dss_video_pll *vpll;
149 void __iomem *pll_base, *clkctrl_base;
150 struct clk *clk;
151 struct dss_pll *pll;
152 int r;
153
154 /* PLL CONTROL */
155
156 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, reg_name[id]);
157 pll_base = devm_ioremap_resource(&pdev->dev, res);
158 if (IS_ERR(pll_base))
159 return ERR_CAST(pll_base);
160
161 /* CLOCK CONTROL */
162
163 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
164 clkctrl_name[id]);
165 clkctrl_base = devm_ioremap_resource(&pdev->dev, res);
166 if (IS_ERR(clkctrl_base))
167 return ERR_CAST(clkctrl_base);
168
169 /* CLKIN */
170
171 clk = devm_clk_get(&pdev->dev, clkin_name[id]);
172 if (IS_ERR(clk)) {
173 DSSERR("can't get video pll clkin\n");
174 return ERR_CAST(clk);
175 }
176
177 vpll = devm_kzalloc(&pdev->dev, sizeof(*vpll), GFP_KERNEL);
178 if (!vpll)
179 return ERR_PTR(-ENOMEM);
180
181 vpll->dev = &pdev->dev;
182 vpll->clkctrl_base = clkctrl_base;
183
184 pll = &vpll->pll;
185
186 pll->name = id == 0 ? "video0" : "video1";
187 pll->id = id == 0 ? DSS_PLL_VIDEO1 : DSS_PLL_VIDEO2;
188 pll->clkin = clk;
189 pll->regulator = regulator;
190 pll->base = pll_base;
191 pll->hw = &dss_dra7_video_pll_hw;
192 pll->ops = &dss_pll_ops;
193
194 r = dss_pll_register(dss, pll);
195 if (r)
196 return ERR_PTR(r);
197
198 return pll;
199}
200
201void dss_video_pll_uninit(struct dss_pll *pll)
202{
203 dss_pll_unregister(pll);
204}