[deliverable/linux.git] / drivers / staging / imx-drm / ipu-v3 / ipu-dp.c

/*
 * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
 * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * for more details.
 */
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/err.h>

#include "imx-ipu-v3.h"
#include "ipu-prv.h"

#define DP_SYNC 0
#define DP_ASYNC0 0x60
#define DP_ASYNC1 0xBC

#define DP_COM_CONF		0x0
#define DP_GRAPH_WIND_CTRL	0x0004
#define DP_FG_POS		0x0008
#define DP_CSC_A_0		0x0044
#define DP_CSC_A_1		0x0048
#define DP_CSC_A_2		0x004C
#define DP_CSC_A_3		0x0050
#define DP_CSC_0		0x0054
#define DP_CSC_1		0x0058

#define DP_COM_CONF_FG_EN		(1 << 0)
#define DP_COM_CONF_GWSEL		(1 << 1)
#define DP_COM_CONF_GWAM		(1 << 2)
#define DP_COM_CONF_GWCKE		(1 << 3)
#define DP_COM_CONF_CSC_DEF_MASK	(3 << 8)
#define DP_COM_CONF_CSC_DEF_OFFSET	8
#define DP_COM_CONF_CSC_DEF_FG		(3 << 8)
#define DP_COM_CONF_CSC_DEF_BG		(2 << 8)
#define DP_COM_CONF_CSC_DEF_BOTH	(1 << 8)

struct ipu_dp_priv;

struct ipu_dp {
	u32 flow;
	bool in_use;
	bool foreground;
	enum ipu_color_space in_cs;
};

struct ipu_flow {
	struct ipu_dp foreground;
	struct ipu_dp background;
	enum ipu_color_space out_cs;
	void __iomem *base;
	struct ipu_dp_priv *priv;
};

struct ipu_dp_priv {
	struct ipu_soc *ipu;
	struct device *dev;
	void __iomem *base;
	struct ipu_flow flow[3];
	struct mutex mutex;
	int use_count;
};

static u32 ipu_dp_flow_base[] = {DP_SYNC, DP_ASYNC0, DP_ASYNC1};

static inline struct ipu_flow *to_flow(struct ipu_dp *dp)
{
	if (dp->foreground)
		return container_of(dp, struct ipu_flow, foreground);
	else
		return container_of(dp, struct ipu_flow, background);
}

int ipu_dp_set_global_alpha(struct ipu_dp *dp, bool enable,
		u8 alpha, bool bg_chan)
{
	struct ipu_flow *flow = to_flow(dp);
	struct ipu_dp_priv *priv = flow->priv;
	u32 reg;

	mutex_lock(&priv->mutex);

	reg = readl(flow->base + DP_COM_CONF);
	if (bg_chan)
		reg &= ~DP_COM_CONF_GWSEL;
	else
		reg |= DP_COM_CONF_GWSEL;
	writel(reg, flow->base + DP_COM_CONF);

	if (enable) {
		reg = readl(flow->base + DP_GRAPH_WIND_CTRL) & 0x00FFFFFFL;
		writel(reg | ((u32) alpha << 24),
			     flow->base + DP_GRAPH_WIND_CTRL);

		reg = readl(flow->base + DP_COM_CONF);
		writel(reg | DP_COM_CONF_GWAM, flow->base + DP_COM_CONF);
	} else {
		reg = readl(flow->base + DP_COM_CONF);
		writel(reg & ~DP_COM_CONF_GWAM, flow->base + DP_COM_CONF);
	}

	ipu_srm_dp_sync_update(priv->ipu);

	mutex_unlock(&priv->mutex);

	return 0;
}
EXPORT_SYMBOL_GPL(ipu_dp_set_global_alpha);

int ipu_dp_set_window_pos(struct ipu_dp *dp, u16 x_pos, u16 y_pos)
{
	struct ipu_flow *flow = to_flow(dp);
	struct ipu_dp_priv *priv = flow->priv;

	writel((x_pos << 16) | y_pos, flow->base + DP_FG_POS);

	ipu_srm_dp_sync_update(priv->ipu);

	return 0;
}
EXPORT_SYMBOL_GPL(ipu_dp_set_window_pos);

static void ipu_dp_csc_init(struct ipu_flow *flow,
		enum ipu_color_space in,
		enum ipu_color_space out,
		u32 place)
{
	u32 reg;

	reg = readl(flow->base + DP_COM_CONF);
	reg &= ~DP_COM_CONF_CSC_DEF_MASK;

	if (in == out) {
		writel(reg, flow->base + DP_COM_CONF);
		return;
	}

	if (in == IPUV3_COLORSPACE_RGB && out == IPUV3_COLORSPACE_YUV) {
		writel(0x099 | (0x12d << 16), flow->base + DP_CSC_A_0);
		writel(0x03a | (0x3a9 << 16), flow->base + DP_CSC_A_1);
		writel(0x356 | (0x100 << 16), flow->base + DP_CSC_A_2);
		writel(0x100 | (0x329 << 16), flow->base + DP_CSC_A_3);
		writel(0x3d6 | (0x0000 << 16) | (2 << 30),
				flow->base + DP_CSC_0);
		writel(0x200 | (2 << 14) | (0x200 << 16) | (2 << 30),
				flow->base + DP_CSC_1);
	} else {
		writel(0x095 | (0x000 << 16), flow->base + DP_CSC_A_0);
		writel(0x0cc | (0x095 << 16), flow->base + DP_CSC_A_1);
		writel(0x3ce | (0x398 << 16), flow->base + DP_CSC_A_2);
		writel(0x095 | (0x0ff << 16), flow->base + DP_CSC_A_3);
		writel(0x000 | (0x3e42 << 16) | (1 << 30),
				flow->base + DP_CSC_0);
		writel(0x10a | (1 << 14) | (0x3dd6 << 16) | (1 << 30),
				flow->base + DP_CSC_1);
	}

	reg |= place;

	writel(reg, flow->base + DP_COM_CONF);
}

int ipu_dp_setup_channel(struct ipu_dp *dp,
		enum ipu_color_space in,
		enum ipu_color_space out)
{
	struct ipu_flow *flow = to_flow(dp);
	struct ipu_dp_priv *priv = flow->priv;

	mutex_lock(&priv->mutex);

	dp->in_cs = in;

	if (!dp->foreground)
		flow->out_cs = out;

	if (flow->foreground.in_cs == flow->background.in_cs) {
		/*
		 * foreground and background are of same colorspace, put
		 * colorspace converter after combining unit.
		 */
		ipu_dp_csc_init(flow, flow->foreground.in_cs, flow->out_cs,
				DP_COM_CONF_CSC_DEF_BOTH);
	} else {
		if (flow->foreground.in_cs == flow->out_cs)
			/*
			 * foreground identical to output, apply color
			 * conversion on background
			 */
			ipu_dp_csc_init(flow, flow->background.in_cs,
					flow->out_cs, DP_COM_CONF_CSC_DEF_BG);
		else
			ipu_dp_csc_init(flow, flow->foreground.in_cs,
					flow->out_cs, DP_COM_CONF_CSC_DEF_FG);
	}

	ipu_srm_dp_sync_update(priv->ipu);

	mutex_unlock(&priv->mutex);

	return 0;
}
EXPORT_SYMBOL_GPL(ipu_dp_setup_channel);

int ipu_dp_enable_channel(struct ipu_dp *dp)
{
	struct ipu_flow *flow = to_flow(dp);
	struct ipu_dp_priv *priv = flow->priv;

	mutex_lock(&priv->mutex);

	if (!priv->use_count)
		ipu_module_enable(priv->ipu, IPU_CONF_DP_EN);

	priv->use_count++;

	if (dp->foreground) {
		u32 reg;

		reg = readl(flow->base + DP_COM_CONF);
		reg |= DP_COM_CONF_FG_EN;
		writel(reg, flow->base + DP_COM_CONF);

		ipu_srm_dp_sync_update(priv->ipu);
	}

	mutex_unlock(&priv->mutex);

	return 0;
}
EXPORT_SYMBOL_GPL(ipu_dp_enable_channel);

void ipu_dp_disable_channel(struct ipu_dp *dp)
{
	struct ipu_flow *flow = to_flow(dp);
	struct ipu_dp_priv *priv = flow->priv;

	mutex_lock(&priv->mutex);

	priv->use_count--;

	if (dp->foreground) {
		u32 reg, csc;

		reg = readl(flow->base + DP_COM_CONF);
		csc = reg & DP_COM_CONF_CSC_DEF_MASK;
		if (csc == DP_COM_CONF_CSC_DEF_FG)
			reg &= ~DP_COM_CONF_CSC_DEF_MASK;

		reg &= ~DP_COM_CONF_FG_EN;
		writel(reg, flow->base + DP_COM_CONF);

		writel(0, flow->base + DP_FG_POS);
		ipu_srm_dp_sync_update(priv->ipu);
	}

	if (!priv->use_count)
		ipu_module_disable(priv->ipu, IPU_CONF_DP_EN);

	if (priv->use_count < 0)
		priv->use_count = 0;

	mutex_unlock(&priv->mutex);
}
EXPORT_SYMBOL_GPL(ipu_dp_disable_channel);

struct ipu_dp *ipu_dp_get(struct ipu_soc *ipu, unsigned int flow)
{
	struct ipu_dp_priv *priv = ipu->dp_priv;
	struct ipu_dp *dp;

	if (flow > 5)
		return ERR_PTR(-EINVAL);

	if (flow & 1)
		dp = &priv->flow[flow >> 1].foreground;
	else
		dp = &priv->flow[flow >> 1].background;

	if (dp->in_use)
		return ERR_PTR(-EBUSY);

	dp->in_use = true;

	return dp;
}
EXPORT_SYMBOL_GPL(ipu_dp_get);

void ipu_dp_put(struct ipu_dp *dp)
{
	dp->in_use = false;
}
EXPORT_SYMBOL_GPL(ipu_dp_put);

int ipu_dp_init(struct ipu_soc *ipu, struct device *dev, unsigned long base)
{
	struct ipu_dp_priv *priv;
	int i;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;
	priv->dev = dev;
	priv->ipu = ipu;

	ipu->dp_priv = priv;

	priv->base = devm_ioremap(dev, base, PAGE_SIZE);
	if (!priv->base) {
		return -ENOMEM;
	}

	mutex_init(&priv->mutex);

	for (i = 0; i < 3; i++) {
		priv->flow[i].foreground.foreground = 1;
		priv->flow[i].base = priv->base + ipu_dp_flow_base[i];
		priv->flow[i].priv = priv;
	}

	return 0;
}

void ipu_dp_exit(struct ipu_soc *ipu)
{
}
Commit	Line	Data
aecfbdb1 SH	1	/*
	2	* Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
	3	* Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License as published by the
	7	* Free Software Foundation; either version 2 of the License, or (at your
	8	* option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful, but
	11	* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
	12	* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	13	* for more details.
	14	*/
	15	#include <linux/export.h>
	16	#include <linux/kernel.h>
	17	#include <linux/types.h>
	18	#include <linux/errno.h>
	19	#include <linux/io.h>
	20	#include <linux/err.h>
	21
	22	#include "imx-ipu-v3.h"
	23	#include "ipu-prv.h"
	24
	25	#define DP_SYNC 0
	26	#define DP_ASYNC0 0x60
	27	#define DP_ASYNC1 0xBC
	28
	29	#define DP_COM_CONF 0x0
	30	#define DP_GRAPH_WIND_CTRL 0x0004
	31	#define DP_FG_POS 0x0008
	32	#define DP_CSC_A_0 0x0044
	33	#define DP_CSC_A_1 0x0048
	34	#define DP_CSC_A_2 0x004C
	35	#define DP_CSC_A_3 0x0050
	36	#define DP_CSC_0 0x0054
	37	#define DP_CSC_1 0x0058
	38
	39	#define DP_COM_CONF_FG_EN (1 << 0)
	40	#define DP_COM_CONF_GWSEL (1 << 1)
	41	#define DP_COM_CONF_GWAM (1 << 2)
	42	#define DP_COM_CONF_GWCKE (1 << 3)
	43	#define DP_COM_CONF_CSC_DEF_MASK (3 << 8)
	44	#define DP_COM_CONF_CSC_DEF_OFFSET 8
	45	#define DP_COM_CONF_CSC_DEF_FG (3 << 8)
	46	#define DP_COM_CONF_CSC_DEF_BG (2 << 8)
	47	#define DP_COM_CONF_CSC_DEF_BOTH (1 << 8)
	48
	49	struct ipu_dp_priv;
	50
	51	struct ipu_dp {
	52	u32 flow;
	53	bool in_use;
	54	bool foreground;
	55	enum ipu_color_space in_cs;
	56	};
	57
	58	struct ipu_flow {
	59	struct ipu_dp foreground;
	60	struct ipu_dp background;
	61	enum ipu_color_space out_cs;
	62	void __iomem *base;
	63	struct ipu_dp_priv *priv;
	64	};
65
66	struct ipu_dp_priv {
67	struct ipu_soc *ipu;
68	struct device *dev;
69	void __iomem *base;
70	struct ipu_flow flow[3];
71	struct mutex mutex;
72	int use_count;
73	};
74
75	static u32 ipu_dp_flow_base[] = {DP_SYNC, DP_ASYNC0, DP_ASYNC1};
76
77	static inline struct ipu_flow to_flow(struct ipu_dp dp)
78	{
79	if (dp->foreground)
80	return container_of(dp, struct ipu_flow, foreground);
81	else
82	return container_of(dp, struct ipu_flow, background);
83	}
84
85	int ipu_dp_set_global_alpha(struct ipu_dp *dp, bool enable,
86	u8 alpha, bool bg_chan)
87	{
88	struct ipu_flow *flow = to_flow(dp);
89	struct ipu_dp_priv *priv = flow->priv;
90	u32 reg;
91
92	mutex_lock(&priv->mutex);
93
94	reg = readl(flow->base + DP_COM_CONF);
95	if (bg_chan)
96	reg &= ~DP_COM_CONF_GWSEL;
97	else
98	reg \|= DP_COM_CONF_GWSEL;
99	writel(reg, flow->base + DP_COM_CONF);
100
101	if (enable) {
102	reg = readl(flow->base + DP_GRAPH_WIND_CTRL) & 0x00FFFFFFL;
103	writel(reg \| ((u32) alpha << 24),
104	flow->base + DP_GRAPH_WIND_CTRL);
105
106	reg = readl(flow->base + DP_COM_CONF);
107	writel(reg \| DP_COM_CONF_GWAM, flow->base + DP_COM_CONF);
108	} else {
109	reg = readl(flow->base + DP_COM_CONF);
110	writel(reg & ~DP_COM_CONF_GWAM, flow->base + DP_COM_CONF);
111	}
112
113	ipu_srm_dp_sync_update(priv->ipu);
114
115	mutex_unlock(&priv->mutex);
116
117	return 0;
118	}
119	EXPORT_SYMBOL_GPL(ipu_dp_set_global_alpha);
120
121	int ipu_dp_set_window_pos(struct ipu_dp *dp, u16 x_pos, u16 y_pos)
122	{
123	struct ipu_flow *flow = to_flow(dp);
124	struct ipu_dp_priv *priv = flow->priv;
125
126	writel((x_pos << 16) \| y_pos, flow->base + DP_FG_POS);
127
128	ipu_srm_dp_sync_update(priv->ipu);
129
130	return 0;
131	}
132	EXPORT_SYMBOL_GPL(ipu_dp_set_window_pos);
133
134	static void ipu_dp_csc_init(struct ipu_flow *flow,
135	enum ipu_color_space in,
136	enum ipu_color_space out,
137	u32 place)
138	{
139	u32 reg;
140
141	reg = readl(flow->base + DP_COM_CONF);
142	reg &= ~DP_COM_CONF_CSC_DEF_MASK;
143
144	if (in == out) {
145	writel(reg, flow->base + DP_COM_CONF);
146	return;
147	}
148
149	if (in == IPUV3_COLORSPACE_RGB && out == IPUV3_COLORSPACE_YUV) {
150	writel(0x099 \| (0x12d << 16), flow->base + DP_CSC_A_0);
151	writel(0x03a \| (0x3a9 << 16), flow->base + DP_CSC_A_1);
152	writel(0x356 \| (0x100 << 16), flow->base + DP_CSC_A_2);
153	writel(0x100 \| (0x329 << 16), flow->base + DP_CSC_A_3);
154	writel(0x3d6 \| (0x0000 << 16) \| (2 << 30),
155	flow->base + DP_CSC_0);
156	writel(0x200 \| (2 << 14) \| (0x200 << 16) \| (2 << 30),
157	flow->base + DP_CSC_1);
158	} else {
159	writel(0x095 \| (0x000 << 16), flow->base + DP_CSC_A_0);
160	writel(0x0cc \| (0x095 << 16), flow->base + DP_CSC_A_1);
161	writel(0x3ce \| (0x398 << 16), flow->base + DP_CSC_A_2);
162	writel(0x095 \| (0x0ff << 16), flow->base + DP_CSC_A_3);
163	writel(0x000 \| (0x3e42 << 16) \| (1 << 30),
164	flow->base + DP_CSC_0);
165	writel(0x10a \| (1 << 14) \| (0x3dd6 << 16) \| (1 << 30),
166	flow->base + DP_CSC_1);
167	}
168
169	reg \|= place;
170
171	writel(reg, flow->base + DP_COM_CONF);
172	}
173
174	int ipu_dp_setup_channel(struct ipu_dp *dp,
175	enum ipu_color_space in,
176	enum ipu_color_space out)
177	{
178	struct ipu_flow *flow = to_flow(dp);
179	struct ipu_dp_priv *priv = flow->priv;
180
181	mutex_lock(&priv->mutex);
182
183	dp->in_cs = in;
184
185	if (!dp->foreground)
186	flow->out_cs = out;
187
188	if (flow->foreground.in_cs == flow->background.in_cs) {
189	/*
190	* foreground and background are of same colorspace, put
191	* colorspace converter after combining unit.
192	*/
193	ipu_dp_csc_init(flow, flow->foreground.in_cs, flow->out_cs,
194	DP_COM_CONF_CSC_DEF_BOTH);
195	} else {
196	if (flow->foreground.in_cs == flow->out_cs)
197	/*
198	* foreground identical to output, apply color
199	* conversion on background
200	*/
201	ipu_dp_csc_init(flow, flow->background.in_cs,
202	flow->out_cs, DP_COM_CONF_CSC_DEF_BG);
203	else
204	ipu_dp_csc_init(flow, flow->foreground.in_cs,
205	flow->out_cs, DP_COM_CONF_CSC_DEF_FG);
206	}
207
208	ipu_srm_dp_sync_update(priv->ipu);
209
210	mutex_unlock(&priv->mutex);
211
212	return 0;
213	}
214	EXPORT_SYMBOL_GPL(ipu_dp_setup_channel);
215
216	int ipu_dp_enable_channel(struct ipu_dp *dp)
217	{
218	struct ipu_flow *flow = to_flow(dp);
219	struct ipu_dp_priv *priv = flow->priv;
220
221	mutex_lock(&priv->mutex);
222
223	if (!priv->use_count)
224	ipu_module_enable(priv->ipu, IPU_CONF_DP_EN);
225
226	priv->use_count++;
227
228	if (dp->foreground) {
229	u32 reg;
230
231	reg = readl(flow->base + DP_COM_CONF);
232	reg \|= DP_COM_CONF_FG_EN;
233	writel(reg, flow->base + DP_COM_CONF);
234
235	ipu_srm_dp_sync_update(priv->ipu);
236	}
237
238	mutex_unlock(&priv->mutex);
239
240	return 0;
241	}
242	EXPORT_SYMBOL_GPL(ipu_dp_enable_channel);
243
244	void ipu_dp_disable_channel(struct ipu_dp *dp)
245	{
246	struct ipu_flow *flow = to_flow(dp);
247	struct ipu_dp_priv *priv = flow->priv;
248
249	mutex_lock(&priv->mutex);
250
251	priv->use_count--;
252
253	if (dp->foreground) {
254	u32 reg, csc;
255
256	reg = readl(flow->base + DP_COM_CONF);
257	csc = reg & DP_COM_CONF_CSC_DEF_MASK;
258	if (csc == DP_COM_CONF_CSC_DEF_FG)
259	reg &= ~DP_COM_CONF_CSC_DEF_MASK;
260
261	reg &= ~DP_COM_CONF_FG_EN;
262	writel(reg, flow->base + DP_COM_CONF);
263
264	writel(0, flow->base + DP_FG_POS);
265	ipu_srm_dp_sync_update(priv->ipu);
266	}
267
268	if (!priv->use_count)
269	ipu_module_disable(priv->ipu, IPU_CONF_DP_EN);
270
271	if (priv->use_count < 0)
272	priv->use_count = 0;
273
274	mutex_unlock(&priv->mutex);
275	}
276	EXPORT_SYMBOL_GPL(ipu_dp_disable_channel);
277
278	struct ipu_dp ipu_dp_get(struct ipu_soc ipu, unsigned int flow)
279	{
280	struct ipu_dp_priv *priv = ipu->dp_priv;
281	struct ipu_dp *dp;
282
283	if (flow > 5)
284	return ERR_PTR(-EINVAL);
285
286	if (flow & 1)
287	dp = &priv->flow[flow >> 1].foreground;
288	else
289	dp = &priv->flow[flow >> 1].background;
290
291	if (dp->in_use)
292	return ERR_PTR(-EBUSY);
293
294	dp->in_use = true;
295
296	return dp;
297	}
298	EXPORT_SYMBOL_GPL(ipu_dp_get);
299
300	void ipu_dp_put(struct ipu_dp *dp)
301	{
302	dp->in_use = false;
303	}
304	EXPORT_SYMBOL_GPL(ipu_dp_put);
305
306	int ipu_dp_init(struct ipu_soc ipu, struct device dev, unsigned long base)
307	{
308	struct ipu_dp_priv *priv;
309	int i;
310
311	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
55b31cf4 FE	312	if (!priv)
55b31cf4 FE	313	return -ENOMEM;
aecfbdb1 SH	314	priv->dev = dev;
	315	priv->ipu = ipu;
	316
	317	ipu->dp_priv = priv;
	318
	319	priv->base = devm_ioremap(dev, base, PAGE_SIZE);
	320	if (!priv->base) {
aecfbdb1 SH	321	return -ENOMEM;
	322	}
	323
	324	mutex_init(&priv->mutex);
	325
	326	for (i = 0; i < 3; i++) {
	327	priv->flow[i].foreground.foreground = 1;
	328	priv->flow[i].base = priv->base + ipu_dp_flow_base[i];
	329	priv->flow[i].priv = priv;
	330	}
	331
	332	return 0;
	333	}
	334
	335	void ipu_dp_exit(struct ipu_soc *ipu)
	336	{
	337	}