1 // SPDX-License-Identifier: GPL-2.0-only
19 #include <linux/clk/clk-conf.h>
27 /* called on periphid match and class 0x9 coresight device. */
34 	uci = table->data;  in amba_cs_uci_id_match()
36 	/* no table data or zero mask - return match on periphid */  in amba_cs_uci_id_match()
37 	if (!uci || (uci->devarch_mask == 0))  in amba_cs_uci_id_match()
41 	ret = (dev->uci.devtype == uci->devtype) &&  in amba_cs_uci_id_match()
42 		((dev->uci.devarch & uci->devarch_mask) == uci->devarch);  in amba_cs_uci_id_match()
49 	while (table->mask) {  in amba_lookup()
50 		if (((dev->periphid & table->mask) == table->id) &&  in amba_lookup()
51 			((dev->cid != CORESIGHT_CID) ||  in amba_lookup()
65 	if (pcdev->driver_override)  in amba_match()
66 		return !strcmp(pcdev->driver_override, drv->name);  in amba_match()
68 	return amba_lookup(pcdrv->id_table, pcdev) != NULL;  in amba_match()
76 	retval = add_uevent_var(env, "AMBA_ID=%08x", pcdev->periphid);  in amba_uevent()
80 	retval = add_uevent_var(env, "MODALIAS=amba:d%08X", pcdev->periphid);  in amba_uevent()
91 	len = sprintf(buf, "%s\n", dev->driver_override);  in driver_override_show()
104 	if (count >= (PAGE_SIZE - 1))  in driver_override_store()
105 		return -EINVAL;  in driver_override_store()
109 		return -ENOMEM;  in driver_override_store()
116 	old = dev->driver_override;  in driver_override_store()
118 		dev->driver_override = driver_override;  in driver_override_store()
121 		dev->driver_override = NULL;  in driver_override_store()
140 amba_attr_func(id, "%08x\n", dev->periphid);
141 amba_attr_func(irq0, "%u\n", dev->irq[0]);
142 amba_attr_func(irq1, "%u\n", dev->irq[1]);
144 	 (unsigned long long)dev->res.start, (unsigned long long)dev->res.end,
145 	 dev->res.flags);
166 	if (ret == 0 && dev->driver) {  in amba_pm_runtime_suspend()
168 			clk_disable(pcdev->pclk);  in amba_pm_runtime_suspend()
170 			clk_disable_unprepare(pcdev->pclk);  in amba_pm_runtime_suspend()
181 	if (dev->driver) {  in amba_pm_runtime_resume()
183 			ret = clk_enable(pcdev->pclk);  in amba_pm_runtime_resume()
185 			ret = clk_prepare_enable(pcdev->pclk);  in amba_pm_runtime_resume()
236 	pcdev->pclk = clk_get(&pcdev->dev, "apb_pclk");  in amba_get_enable_pclk()
237 	if (IS_ERR(pcdev->pclk))  in amba_get_enable_pclk()
238 		return PTR_ERR(pcdev->pclk);  in amba_get_enable_pclk()
240 	ret = clk_prepare_enable(pcdev->pclk);  in amba_get_enable_pclk()
242 		clk_put(pcdev->pclk);  in amba_get_enable_pclk()
249 	clk_disable_unprepare(pcdev->pclk);  in amba_put_disable_pclk()
250 	clk_put(pcdev->pclk);  in amba_put_disable_pclk()
260 	struct amba_driver *pcdrv = to_amba_driver(dev->driver);  in amba_probe()
261 	const struct amba_id *id = amba_lookup(pcdrv->id_table, pcdev);  in amba_probe()
265 		ret = of_clk_set_defaults(dev->of_node, false);  in amba_probe()
283 		ret = pcdrv->probe(pcdev, id);  in amba_probe()
301 	struct amba_driver *drv = to_amba_driver(dev->driver);  in amba_remove()
304 	if (drv->remove)  in amba_remove()
305 		drv->remove(pcdev);  in amba_remove()
321 	struct amba_driver *drv = to_amba_driver(dev->driver);  in amba_shutdown()
323 	if (drv->shutdown)  in amba_shutdown()
324 		drv->shutdown(to_amba_device(dev));  in amba_shutdown()
328  *	amba_driver_register - register an AMBA device driver
332  *	core.  If devices pre-exist, the drivers probe function will
337 	if (!drv->probe)  in amba_driver_register()
338 		return -EINVAL;  in amba_driver_register()
340 	drv->drv.bus = &amba_bustype;  in amba_driver_register()
341 	drv->drv.probe = amba_probe;  in amba_driver_register()
342 	drv->drv.remove = amba_remove;  in amba_driver_register()
343 	drv->drv.shutdown = amba_shutdown;  in amba_driver_register()
345 	return driver_register(&drv->drv);  in amba_driver_register()
349  *	amba_driver_unregister - remove an AMBA device driver
358 	driver_unregister(&drv->drv);  in amba_driver_unregister()
366 	if (d->res.parent)  in amba_device_release()
367 		release_resource(&d->res);  in amba_device_release()
377 	ret = request_resource(parent, &dev->res);  in amba_device_try_add()
381 	/* Hard-coded primecell ID instead of plug-n-play */  in amba_device_try_add()
382 	if (dev->periphid != 0)  in amba_device_try_add()
389 	size = resource_size(&dev->res);  in amba_device_try_add()
390 	tmp = ioremap(dev->res.start, size);  in amba_device_try_add()
392 		ret = -ENOMEM;  in amba_device_try_add()
396 	ret = dev_pm_domain_attach(&dev->dev, true);  in amba_device_try_add()
408 		 * Find reset control(s) of the amba bus and de-assert them.  in amba_device_try_add()
410 		rstc = of_reset_control_array_get_optional_shared(dev->dev.of_node);  in amba_device_try_add()
413 			if (ret != -EPROBE_DEFER)  in amba_device_try_add()
414 				dev_err(&dev->dev, "can't get reset: %d\n",  in amba_device_try_add()
426 			pid |= (readl(tmp + size - 0x20 + 4 * i) & 255) <<  in amba_device_try_add()
429 			cid |= (readl(tmp + size - 0x10 + 4 * i) & 255) <<  in amba_device_try_add()
434 			void __iomem *csbase = tmp + size - 4096;  in amba_device_try_add()
436 			dev->uci.devarch =  in amba_device_try_add()
438 			dev->uci.devtype =  in amba_device_try_add()
445 			dev->periphid = pid;  in amba_device_try_add()
446 			dev->cid = cid;  in amba_device_try_add()
449 		if (!dev->periphid)  in amba_device_try_add()
450 			ret = -ENODEV;  in amba_device_try_add()
454 	dev_pm_domain_detach(&dev->dev, true);  in amba_device_try_add()
460 	ret = device_add(&dev->dev);  in amba_device_try_add()
464 	if (dev->irq[0])  in amba_device_try_add()
465 		ret = device_create_file(&dev->dev, &dev_attr_irq0);  in amba_device_try_add()
466 	if (ret == 0 && dev->irq[1])  in amba_device_try_add()
467 		ret = device_create_file(&dev->dev, &dev_attr_irq1);  in amba_device_try_add()
471 	device_unregister(&dev->dev);  in amba_device_try_add()
474 	release_resource(&dev->res);  in amba_device_try_add()
481 	dev_pm_domain_detach(&dev->dev, true);  in amba_device_try_add()
515 		int ret = amba_device_try_add(ddev->dev, ddev->parent);  in amba_deferred_retry()
517 		if (ret == -EPROBE_DEFER)  in amba_deferred_retry()
520 		list_del_init(&ddev->node);  in amba_deferred_retry()
540  *	amba_device_add - add a previously allocated AMBA device structure
552 	if (ret == -EPROBE_DEFER) {  in amba_device_add()
557 			return -ENOMEM;  in amba_device_add()
559 		ddev->dev = dev;  in amba_device_add()
560 		ddev->parent = parent;  in amba_device_add()
568 		list_add_tail(&ddev->node, &deferred_devices);  in amba_device_add()
579 		     void *pdata, unsigned int periphid, u64 dma_mask,  in amba_aphb_device_add()  argument
587 		return ERR_PTR(-ENOMEM);  in amba_aphb_device_add()
589 	dev->dev.coherent_dma_mask = dma_mask;  in amba_aphb_device_add()
590 	dev->irq[0] = irq1;  in amba_aphb_device_add()
591 	dev->irq[1] = irq2;  in amba_aphb_device_add()
592 	dev->periphid = periphid;  in amba_aphb_device_add()
593 	dev->dev.platform_data = pdata;  in amba_aphb_device_add()
594 	dev->dev.parent = parent;  in amba_aphb_device_add()
608 		    void *pdata, unsigned int periphid)  in amba_apb_device_add()  argument
611 				    periphid, 0, &iomem_resource);  in amba_apb_device_add()
618 		    void *pdata, unsigned int periphid)  in amba_ahb_device_add()  argument
621 				    periphid, ~0ULL, &iomem_resource);  in amba_ahb_device_add()
628 			int irq2, void *pdata, unsigned int periphid,  in amba_apb_device_add_res()  argument
632 				    periphid, 0, resbase);  in amba_apb_device_add_res()
639 			int irq2, void *pdata, unsigned int periphid,  in amba_ahb_device_add_res()  argument
643 				    periphid, ~0ULL, resbase);  in amba_ahb_device_add_res()
650 	device_initialize(&dev->dev);  in amba_device_initialize()
652 		dev_set_name(&dev->dev, "%s", name);  in amba_device_initialize()
653 	dev->dev.release = amba_device_release;  in amba_device_initialize()
654 	dev->dev.bus = &amba_bustype;  in amba_device_initialize()
655 	dev->dev.dma_mask = &dev->dev.coherent_dma_mask;  in amba_device_initialize()
656 	dev->dev.dma_parms = &dev->dma_parms;  in amba_device_initialize()
657 	dev->res.name = dev_name(&dev->dev);  in amba_device_initialize()
661  *	amba_device_alloc - allocate an AMBA device
677 		dev->res.start = base;  in amba_device_alloc()
678 		dev->res.end = base + size - 1;  in amba_device_alloc()
679 		dev->res.flags = IORESOURCE_MEM;  in amba_device_alloc()
687  *	amba_device_register - register an AMBA device
697 	amba_device_initialize(dev, dev->dev.init_name);  in amba_device_register()
698 	dev->dev.init_name = NULL;  in amba_device_register()
704  *	amba_device_put - put an AMBA device
709 	put_device(&dev->dev);  in amba_device_put()
714  *	amba_device_unregister - unregister an AMBA device
726 	device_unregister(&dev->dev);  in amba_device_unregister()
744 	r = (pcdev->periphid & d->mask) == d->id;  in amba_find_match()
745 	if (d->parent)  in amba_find_match()
746 		r &= d->parent == dev->parent;  in amba_find_match()
747 	if (d->busid)  in amba_find_match()
748 		r &= strcmp(dev_name(dev), d->busid) == 0;  in amba_find_match()
752 		d->dev = pcdev;  in amba_find_match()
759  *	amba_find_device - locate an AMBA device given a bus id
790  *	amba_request_regions - request all mem regions associated with device
800 		name = dev->dev.driver->name;  in amba_request_regions()
802 	size = resource_size(&dev->res);  in amba_request_regions()
804 	if (!request_mem_region(dev->res.start, size, name))  in amba_request_regions()
805 		ret = -EBUSY;  in amba_request_regions()
811  *	amba_release_regions - release mem regions associated with device
820 	size = resource_size(&dev->res);  in amba_release_regions()
821 	release_mem_region(dev->res.start, size);  in amba_release_regions()