3  * Freescale Management Complex (MC) bus driver
11 #define pr_fmt(fmt) "fsl-mc: " fmt
25 #include "fsl-mc-private.h"
28  * Default DMA mask for devices on a fsl-mc bus
35  * struct fsl_mc - Private data of a "fsl,qoriq-mc" platform device
36  * @root_mc_bus_dev: fsl-mc device representing the root DPRC
51  * @mc_region_type: Type of MC region for the range being translated
52  * @start_mc_offset: Start MC offset of the range being translated
53  * @end_mc_offset: MC offset of the first byte after the range (last MC
76  * @dev: the fsl-mc device to match against
77  * @drv: the device driver to search for matching fsl-mc object type
131 	if (add_uevent_var(env, "MODALIAS=fsl-mc:v%08Xd%s",  in fsl_mc_bus_uevent()
159 	return sprintf(buf, "fsl-mc:v%08Xd%s\n", mc_dev->obj_desc.vendor,  in modalias_show()
311 	.name = "fsl-mc",
476  * MC bus
512  * MC bus
542 	/* send command to mc*/  in mc_get_version()
557  * fsl_mc_get_version - function to retrieve the MC f/w version information
559  * Return:	mc version when called after fsl-mc-bus probe; NULL otherwise.
633 	struct fsl_mc *mc;  in translate_mc_addr()  local
636 	mc = dev_get_drvdata(root_dprc_dev->parent);  in translate_mc_addr()
638 	if (mc->num_translation_ranges == 0) {  in translate_mc_addr()
646 	for (i = 0; i < mc->num_translation_ranges; i++) {  in translate_mc_addr()
648 			&mc->translation_ranges[i];  in translate_mc_addr()
679 		 * This function should not have been called for this MC object  in fsl_mc_device_get_mmio_regions()
705 		 * Older MC only returned region offset and no base address  in fsl_mc_device_get_mmio_regions()
718 			 * Some versions of the MC firmware wrongly report  in fsl_mc_device_get_mmio_regions()
735 				"Invalid MC offset: %#x (for %s.%d\'s region %d)\n",  in fsl_mc_device_get_mmio_regions()
742 		regions[i].name = "fsl-mc object MMIO region";  in fsl_mc_device_get_mmio_regions()
781  * Add a newly discovered fsl-mc device to be visible in Linux
800 		 * Allocate an MC bus device object:  in fsl_mc_device_add()
839 		 * parent DPRC's MC portal instead of the child DPRC's MC  in fsl_mc_device_add()
844 		 * given MC object, using the same MC portal.  in fsl_mc_device_add()
880 	 * Get MMIO regions for the device from the MC:  in fsl_mc_device_add()
920  * fsl_mc_device_remove - Remove an fsl-mc device from being visible to
923  * @mc_dev: Pointer to an fsl-mc device
972 	 * yet discovered by the fsl-mc bus, thus the lookup returned NULL.  in fsl_mc_get_endpoint()
1071 		 * 'fsl,qoriq-mc' node. In this case, identity mapping  in get_mc_addr_translation_ranges()
1104  * fsl_mc_bus_probe - callback invoked when the root MC bus is being
1111 	struct fsl_mc *mc;  in fsl_mc_bus_probe()  local
1119 	mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);  in fsl_mc_bus_probe()
1120 	if (!mc)  in fsl_mc_bus_probe()
1123 	platform_set_drvdata(pdev, mc);  in fsl_mc_bus_probe()
1127 		mc->fsl_mc_regs = devm_ioremap_resource(&pdev->dev, plat_res);  in fsl_mc_bus_probe()
1128 		if (IS_ERR(mc->fsl_mc_regs))  in fsl_mc_bus_probe()
1129 			return PTR_ERR(mc->fsl_mc_regs);  in fsl_mc_bus_probe()
1132 	if (mc->fsl_mc_regs) {  in fsl_mc_bus_probe()
1134 			mc_stream_id = readl(mc->fsl_mc_regs + FSL_MC_FAPR);  in fsl_mc_bus_probe()
1155 		 * Some bootloaders pause the MC firmware before booting the  in fsl_mc_bus_probe()
1156 		 * kernel so that MC will not cause faults as soon as the  in fsl_mc_bus_probe()
1158 		 * in place for MC.  in fsl_mc_bus_probe()
1159 		 * At this point MC should have all its SMMU setup done so make  in fsl_mc_bus_probe()
1162 		writel(readl(mc->fsl_mc_regs + FSL_MC_GCR1) &  in fsl_mc_bus_probe()
1164 		       mc->fsl_mc_regs + FSL_MC_GCR1);  in fsl_mc_bus_probe()
1168 	 * Get physical address of MC portal for the root DPRC:  in fsl_mc_bus_probe()
1188 	dev_info(&pdev->dev, "MC firmware version: %u.%u.%u\n",  in fsl_mc_bus_probe()
1193 						&mc->translation_ranges,  in fsl_mc_bus_probe()
1194 						&mc->num_translation_ranges);  in fsl_mc_bus_probe()
1223 	mc->root_mc_bus_dev = mc_bus_dev;  in fsl_mc_bus_probe()
1233  * fsl_mc_bus_remove - callback invoked when the root MC bus is being
1238 	struct fsl_mc *mc = platform_get_drvdata(pdev);  in fsl_mc_bus_remove()  local
1240 	if (!fsl_mc_is_root_dprc(&mc->root_mc_bus_dev->dev))  in fsl_mc_bus_remove()
1243 	fsl_mc_device_remove(mc->root_mc_bus_dev);  in fsl_mc_bus_remove()
1245 	fsl_destroy_mc_io(mc->root_mc_bus_dev->mc_io);  in fsl_mc_bus_remove()
1246 	mc->root_mc_bus_dev->mc_io = NULL;  in fsl_mc_bus_remove()
1250 	if (mc->fsl_mc_regs) {  in fsl_mc_bus_remove()
1252 		 * Pause the MC firmware so that it doesn't crash in certain  in fsl_mc_bus_remove()
1255 		writel(readl(mc->fsl_mc_regs + FSL_MC_GCR1) |  in fsl_mc_bus_remove()
1257 		       mc->fsl_mc_regs + FSL_MC_GCR1);  in fsl_mc_bus_remove()
1269 	{.compatible = "fsl,qoriq-mc",},
1316 	 * Make sure that the MC firmware is paused before the IOMMU setup for  in fsl_mc_bus_notifier()