13 #include <linux/soc/amlogic/meson-canvas.h>
37 	spinlock_t lock; /* canvas device lock */
42 static void canvas_write(struct meson_canvas *canvas, u32 reg, u32 val)  in canvas_write()  argument
44 	writel_relaxed(val, canvas->reg_base + reg);  in canvas_write()
47 static u32 canvas_read(struct meson_canvas *canvas, u32 reg)  in canvas_read()  argument
49 	return readl_relaxed(canvas->reg_base + reg);  in canvas_read()
56 	struct meson_canvas *canvas;  in meson_canvas_get()  local
58 	canvas_node = of_parse_phandle(dev->of_node, "amlogic,canvas", 0);  in meson_canvas_get()
71 	 * If priv is NULL, it's probably because the canvas hasn't  in meson_canvas_get()
75 	canvas = dev_get_drvdata(&canvas_pdev->dev);  in meson_canvas_get()
76 	if (!canvas) {  in meson_canvas_get()
81 	return canvas;  in meson_canvas_get()
85 int meson_canvas_config(struct meson_canvas *canvas, u8 canvas_index,  in meson_canvas_config()  argument
93 	if (endian && !canvas->supports_endianness) {  in meson_canvas_config()
94 		dev_err(canvas->dev,  in meson_canvas_config()
99 	spin_lock_irqsave(&canvas->lock, flags);  in meson_canvas_config()
100 	if (!canvas->used[canvas_index]) {  in meson_canvas_config()
101 		dev_err(canvas->dev,  in meson_canvas_config()
102 			"Trying to setup non allocated canvas %u\n",  in meson_canvas_config()
104 		spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_config()
108 	canvas_write(canvas, DMC_CAV_LUT_DATAL,  in meson_canvas_config()
112 	canvas_write(canvas, DMC_CAV_LUT_DATAH,  in meson_canvas_config()
120 	canvas_write(canvas, DMC_CAV_LUT_ADDR,  in meson_canvas_config()
124 	canvas_read(canvas, DMC_CAV_LUT_DATAH);  in meson_canvas_config()
125 	spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_config()
131 int meson_canvas_alloc(struct meson_canvas *canvas, u8 *canvas_index)  in meson_canvas_alloc()  argument
136 	spin_lock_irqsave(&canvas->lock, flags);  in meson_canvas_alloc()
138 		if (!canvas->used[i]) {  in meson_canvas_alloc()
139 			canvas->used[i] = 1;  in meson_canvas_alloc()
140 			spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_alloc()
145 	spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_alloc()
147 	dev_err(canvas->dev, "No more canvas available\n");  in meson_canvas_alloc()
152 int meson_canvas_free(struct meson_canvas *canvas, u8 canvas_index)  in meson_canvas_free()  argument
156 	spin_lock_irqsave(&canvas->lock, flags);  in meson_canvas_free()
157 	if (!canvas->used[canvas_index]) {  in meson_canvas_free()
158 		dev_err(canvas->dev,  in meson_canvas_free()
159 			"Trying to free unused canvas %u\n", canvas_index);  in meson_canvas_free()
160 		spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_free()
163 	canvas->used[canvas_index] = 0;  in meson_canvas_free()
164 	spin_unlock_irqrestore(&canvas->lock, flags);  in meson_canvas_free()
172 	struct meson_canvas *canvas;  in meson_canvas_probe()  local
175 	canvas = devm_kzalloc(dev, sizeof(*canvas), GFP_KERNEL);  in meson_canvas_probe()
176 	if (!canvas)  in meson_canvas_probe()
179 	canvas->reg_base = devm_platform_ioremap_resource(pdev, 0);  in meson_canvas_probe()
180 	if (IS_ERR(canvas->reg_base))  in meson_canvas_probe()
181 		return PTR_ERR(canvas->reg_base);  in meson_canvas_probe()
183 	canvas->supports_endianness = of_device_get_match_data(dev);  in meson_canvas_probe()
185 	canvas->dev = dev;  in meson_canvas_probe()
186 	spin_lock_init(&canvas->lock);  in meson_canvas_probe()
187 	dev_set_drvdata(dev, canvas);  in meson_canvas_probe()
193 	{ .compatible = "amlogic,meson8-canvas", .data = (void *)false, },
194 	{ .compatible = "amlogic,meson8b-canvas", .data = (void *)false, },
195 	{ .compatible = "amlogic,meson8m2-canvas", .data = (void *)false, },
196 	{ .compatible = "amlogic,canvas", .data = (void *)true, },
204 		.name = "amlogic-canvas",
210 MODULE_DESCRIPTION("Amlogic Canvas driver");