3  * FPGA Region - Device Tree support for FPGA programming under Linux
10 #include <linux/fpga/fpga-region.h>
22 	{ .compatible = "fpga-region", },
28  * of_fpga_region_find - find FPGA region
29  * @np: device node of FPGA Region
31  * Caller will need to put_device(&region->dev) when done.
33  * Return: FPGA Region struct or NULL
42  * @np: device node of FPGA region
44  * Get FPGA Manager from "fpga-mgr" property or from ancestor region.
57 		if (of_device_is_compatible(np, "fpga-region")) {  in of_fpga_region_get_mgr()
75  * @region: FPGA region
82  * Caller should call fpga_bridges_put(&region->bridge_list) when
88 static int of_fpga_region_get_bridges(struct fpga_region *region)  in of_fpga_region_get_bridges()  argument
90 	struct device *dev = &region->dev;  in of_fpga_region_get_bridges()
92 	struct fpga_image_info *info = region->info;  in of_fpga_region_get_bridges()
98 					 &region->bridge_list);  in of_fpga_region_get_bridges()
130 						 &region->bridge_list);  in of_fpga_region_get_bridges()
135 			fpga_bridges_put(&region->bridge_list);  in of_fpga_region_get_bridges()
144  * child_regions_with_firmware - Used to check the child region info.
150  * Return: 0 for OK or -EINVAL if child FPGA region adds firmware-name.
174 		pr_err("firmware-name not allowed in child FPGA region: %pOF",  in child_regions_with_firmware()
181  * of_fpga_region_parse_ov - parse and check overlay applied to region
183  * @region: FPGA region
184  * @overlay: overlay applied to the FPGA region
186  * Given an overlay applied to an FPGA region, parse the FPGA image specific
195 of_fpga_region_parse_ov(struct fpga_region *region,  in of_fpga_region_parse_ov()  argument
198 	struct device *dev = &region->dev;  in of_fpga_region_parse_ov()
203 	if (region->info) {  in of_fpga_region_parse_ov()
204 		dev_err(dev, "Region already has overlay applied.\n");  in of_fpga_region_parse_ov()
210 	 * firmware-name property (would mean that an FPGA region that has  in of_fpga_region_parse_ov()
223 	/* Read FPGA region properties from the overlay */  in of_fpga_region_parse_ov()
241 	of_property_read_u32(overlay, "region-unfreeze-timeout-us",  in of_fpga_region_parse_ov()
244 	of_property_read_u32(overlay, "region-freeze-timeout-us",  in of_fpga_region_parse_ov()
275  * @region: FPGA region that the overlay was applied to
278  * Called when an overlay targeted to an FPGA Region is about to be applied.
286 static int of_fpga_region_notify_pre_apply(struct fpga_region *region,  in of_fpga_region_notify_pre_apply()  argument
289 	struct device *dev = &region->dev;  in of_fpga_region_notify_pre_apply()
293 	info = of_fpga_region_parse_ov(region, nd->overlay);  in of_fpga_region_notify_pre_apply()
301 	if (region->info) {  in of_fpga_region_notify_pre_apply()
302 		dev_err(dev, "Region already has overlay applied.\n");  in of_fpga_region_notify_pre_apply()
306 	region->info = info;  in of_fpga_region_notify_pre_apply()
307 	ret = fpga_region_program_fpga(region);  in of_fpga_region_notify_pre_apply()
311 		region->info = NULL;  in of_fpga_region_notify_pre_apply()
320  * @region: FPGA region that was targeted by the overlay that was removed
324  * FPGA region.
326 static void of_fpga_region_notify_post_remove(struct fpga_region *region,  in of_fpga_region_notify_post_remove()  argument
329 	fpga_bridges_disable(&region->bridge_list);  in of_fpga_region_notify_post_remove()
330 	fpga_bridges_put(&region->bridge_list);  in of_fpga_region_notify_post_remove()
331 	fpga_image_info_free(region->info);  in of_fpga_region_notify_post_remove()
332 	region->info = NULL;  in of_fpga_region_notify_post_remove()
342  * added to an fpga-region.
350 	struct fpga_region *region;  in of_fpga_region_notify()  local
370 	region = of_fpga_region_find(nd->target);  in of_fpga_region_notify()
371 	if (!region)  in of_fpga_region_notify()
377 		ret = of_fpga_region_notify_pre_apply(region, nd);  in of_fpga_region_notify()
381 		of_fpga_region_notify_post_remove(region, nd);  in of_fpga_region_notify()
385 	put_device(&region->dev);  in of_fpga_region_notify()
401 	struct fpga_region *region;  in of_fpga_region_probe()  local
405 	/* Find the FPGA mgr specified by region or parent region. */  in of_fpga_region_probe()
410 	region = fpga_region_register(dev, mgr, of_fpga_region_get_bridges);  in of_fpga_region_probe()
411 	if (IS_ERR(region)) {  in of_fpga_region_probe()
412 		ret = PTR_ERR(region);  in of_fpga_region_probe()
416 	of_platform_populate(np, fpga_region_of_match, NULL, &region->dev);  in of_fpga_region_probe()
417 	platform_set_drvdata(pdev, region);  in of_fpga_region_probe()
419 	dev_info(dev, "FPGA Region probed\n");  in of_fpga_region_probe()
430 	struct fpga_region *region = platform_get_drvdata(pdev);  in of_fpga_region_remove()  local
431 	struct fpga_manager *mgr = region->mgr;  in of_fpga_region_remove()
433 	fpga_region_unregister(region);  in of_fpga_region_remove()
443 		.name	= "of-fpga-region",
482 MODULE_DESCRIPTION("FPGA Region");