3  * FPGA Region - Device Tree support for FPGA programming under Linux
10 #include <linux/fpga/fpga-region.h>
20 	{ .compatible = "fpga-region", },
26  * of_fpga_region_find - find FPGA region
27  * @np: device node of FPGA Region
29  * Caller will need to put_device(&region->dev) when done.
31  * Return: FPGA Region struct or NULL
40  * @np: device node of FPGA region
42  * Get FPGA Manager from "fpga-mgr" property or from ancestor region.
55 		if (of_device_is_compatible(np, "fpga-region")) {  in of_fpga_region_get_mgr()
73  * @region: FPGA region
80  * Caller should call fpga_bridges_put(&region->bridge_list) when
86 static int of_fpga_region_get_bridges(struct fpga_region *region)  in of_fpga_region_get_bridges()  argument
88 	struct device *dev = &region->dev;  in of_fpga_region_get_bridges()
90 	struct fpga_image_info *info = region->info;  in of_fpga_region_get_bridges()
96 					 &region->bridge_list);  in of_fpga_region_get_bridges()
128 						 &region->bridge_list);  in of_fpga_region_get_bridges()
133 			fpga_bridges_put(&region->bridge_list);  in of_fpga_region_get_bridges()
142  * child_regions_with_firmware - Used to check the child region info.
148  * Return: 0 for OK or -EINVAL if child FPGA region adds firmware-name.
172 		pr_err("firmware-name not allowed in child FPGA region: %pOF",  in child_regions_with_firmware()
179  * of_fpga_region_parse_ov - parse and check overlay applied to region
181  * @region: FPGA region
182  * @overlay: overlay applied to the FPGA region
184  * Given an overlay applied to an FPGA region, parse the FPGA image specific
193 of_fpga_region_parse_ov(struct fpga_region *region,  in of_fpga_region_parse_ov()  argument
196 	struct device *dev = &region->dev;  in of_fpga_region_parse_ov()
201 	if (region->info) {  in of_fpga_region_parse_ov()
202 		dev_err(dev, "Region already has overlay applied.\n");  in of_fpga_region_parse_ov()
208 	 * firmware-name property (would mean that an FPGA region that has  in of_fpga_region_parse_ov()
221 	/* Read FPGA region properties from the overlay */  in of_fpga_region_parse_ov()
239 	of_property_read_u32(overlay, "region-unfreeze-timeout-us",  in of_fpga_region_parse_ov()
242 	of_property_read_u32(overlay, "region-freeze-timeout-us",  in of_fpga_region_parse_ov()
273  * @region: FPGA region that the overlay was applied to
276  * Called when an overlay targeted to an FPGA Region is about to be applied.
284 static int of_fpga_region_notify_pre_apply(struct fpga_region *region,  in of_fpga_region_notify_pre_apply()  argument
287 	struct device *dev = &region->dev;  in of_fpga_region_notify_pre_apply()
291 	info = of_fpga_region_parse_ov(region, nd->overlay);  in of_fpga_region_notify_pre_apply()
299 	if (region->info) {  in of_fpga_region_notify_pre_apply()
300 		dev_err(dev, "Region already has overlay applied.\n");  in of_fpga_region_notify_pre_apply()
304 	region->info = info;  in of_fpga_region_notify_pre_apply()
305 	ret = fpga_region_program_fpga(region);  in of_fpga_region_notify_pre_apply()
309 		region->info = NULL;  in of_fpga_region_notify_pre_apply()
318  * @region: FPGA region that was targeted by the overlay that was removed
322  * FPGA region.
324 static void of_fpga_region_notify_post_remove(struct fpga_region *region,  in of_fpga_region_notify_post_remove()  argument
327 	fpga_bridges_disable(&region->bridge_list);  in of_fpga_region_notify_post_remove()
328 	fpga_bridges_put(&region->bridge_list);  in of_fpga_region_notify_post_remove()
329 	fpga_image_info_free(region->info);  in of_fpga_region_notify_post_remove()
330 	region->info = NULL;  in of_fpga_region_notify_post_remove()
340  * added to an fpga-region.
348 	struct fpga_region *region;  in of_fpga_region_notify()  local
368 	region = of_fpga_region_find(nd->target);  in of_fpga_region_notify()
369 	if (!region)  in of_fpga_region_notify()
375 		ret = of_fpga_region_notify_pre_apply(region, nd);  in of_fpga_region_notify()
379 		of_fpga_region_notify_post_remove(region, nd);  in of_fpga_region_notify()
383 	put_device(&region->dev);  in of_fpga_region_notify()
399 	struct fpga_region *region;  in of_fpga_region_probe()  local
403 	/* Find the FPGA mgr specified by region or parent region. */  in of_fpga_region_probe()
408 	region = fpga_region_register(dev, mgr, of_fpga_region_get_bridges);  in of_fpga_region_probe()
409 	if (IS_ERR(region)) {  in of_fpga_region_probe()
410 		ret = PTR_ERR(region);  in of_fpga_region_probe()
414 	of_platform_populate(np, fpga_region_of_match, NULL, &region->dev);  in of_fpga_region_probe()
415 	platform_set_drvdata(pdev, region);  in of_fpga_region_probe()
417 	dev_info(dev, "FPGA Region probed\n");  in of_fpga_region_probe()
428 	struct fpga_region *region = platform_get_drvdata(pdev);  in of_fpga_region_remove()  local
429 	struct fpga_manager *mgr = region->mgr;  in of_fpga_region_remove()
431 	fpga_region_unregister(region);  in of_fpga_region_remove()
441 		.name	= "of-fpga-region",
480 MODULE_DESCRIPTION("FPGA Region");