3  * rcar-fcp.c  --  R-Car Frame Compression Processor Driver
20 #include <media/rcar-fcp.h>
36  * rcar_fcp_get - Find and acquire a reference to an FCP instance
37  * @np: Device node of the FCP instance
39  * Search the list of registered FCP instances for the instance corresponding to
42  * Return a pointer to the FCP instance, or an ERR_PTR if the instance can't be
47 	struct rcar_fcp_device *fcp;  in rcar_fcp_get()  local
51 	list_for_each_entry(fcp, &fcp_devices, list) {  in rcar_fcp_get()
52 		if (fcp->dev->of_node != np)  in rcar_fcp_get()
55 		get_device(fcp->dev);  in rcar_fcp_get()
59 	fcp = ERR_PTR(-EPROBE_DEFER);  in rcar_fcp_get()
63 	return fcp;  in rcar_fcp_get()
68  * rcar_fcp_put - Release a reference to an FCP instance
69  * @fcp: The FCP instance
71  * Release the FCP instance acquired by a call to rcar_fcp_get().
73 void rcar_fcp_put(struct rcar_fcp_device *fcp)  in rcar_fcp_put()  argument
75 	if (fcp)  in rcar_fcp_put()
76 		put_device(fcp->dev);  in rcar_fcp_put()
80 struct device *rcar_fcp_get_device(struct rcar_fcp_device *fcp)  in rcar_fcp_get_device()  argument
82 	return fcp->dev;  in rcar_fcp_get_device()
87  * rcar_fcp_enable - Enable an FCP
88  * @fcp: The FCP instance
90  * Before any memory access through an FCP is performed by a module, the FCP
93  * call when no more memory transfer can occur through the FCP.
98 int rcar_fcp_enable(struct rcar_fcp_device *fcp)  in rcar_fcp_enable()  argument
102 	if (!fcp)  in rcar_fcp_enable()
105 	ret = pm_runtime_get_sync(fcp->dev);  in rcar_fcp_enable()
107 		pm_runtime_put_noidle(fcp->dev);  in rcar_fcp_enable()
116  * rcar_fcp_disable - Disable an FCP
117  * @fcp: The FCP instance
120  * reference counted a disable call may not disable the FCP synchronously.
122 void rcar_fcp_disable(struct rcar_fcp_device *fcp)  in rcar_fcp_disable()  argument
124 	if (fcp)  in rcar_fcp_disable()
125 		pm_runtime_put(fcp->dev);  in rcar_fcp_disable()
135 	struct rcar_fcp_device *fcp;  in rcar_fcp_probe()  local
137 	fcp = devm_kzalloc(&pdev->dev, sizeof(*fcp), GFP_KERNEL);  in rcar_fcp_probe()
138 	if (fcp == NULL)  in rcar_fcp_probe()
141 	fcp->dev = &pdev->dev;  in rcar_fcp_probe()
143 	fcp->dev->dma_parms = &fcp->dma_parms;  in rcar_fcp_probe()
144 	dma_set_max_seg_size(fcp->dev, DMA_BIT_MASK(32));  in rcar_fcp_probe()
149 	list_add_tail(&fcp->list, &fcp_devices);  in rcar_fcp_probe()
152 	platform_set_drvdata(pdev, fcp);  in rcar_fcp_probe()
159 	struct rcar_fcp_device *fcp = platform_get_drvdata(pdev);  in rcar_fcp_remove()  local
162 	list_del(&fcp->list);  in rcar_fcp_remove()
181 		.name	= "rcar-fcp",
189 MODULE_ALIAS("rcar-fcp");
191 MODULE_DESCRIPTION("Renesas FCP Driver");