Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Compaq Hot Plug Controller Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (c) 1995,2001 Compaq Computer Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * Copyright (c) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Copyright (c) 2001 IBM Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * Send feedback to <greg@kroah.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/pci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "shpchp.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /* A few routines that create sysfs entries for the hot plug controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static ssize_t show_ctrl(struct device *dev, struct device_attribute *attr, char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	struct pci_dev *pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	char *out = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	int index, busnr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	struct pci_bus *bus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	pdev = to_pci_dev(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	bus = pdev->subordinate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	out += sprintf(buf, "Free resources: memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	pci_bus_for_each_resource(bus, res, index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		if (res && (res->flags & IORESOURCE_MEM) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 				!(res->flags & IORESOURCE_PREFETCH)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 			out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 				       (unsigned long long)res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 				       (unsigned long long)resource_size(res));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	out += sprintf(out, "Free resources: prefetchable memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	pci_bus_for_each_resource(bus, res, index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		if (res && (res->flags & IORESOURCE_MEM) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 			       (res->flags & IORESOURCE_PREFETCH)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 			out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 				       (unsigned long long)res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 				       (unsigned long long)resource_size(res));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	out += sprintf(out, "Free resources: IO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	pci_bus_for_each_resource(bus, res, index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		if (res && (res->flags & IORESOURCE_IO)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 			out += sprintf(out, "start = %8.8llx, length = %8.8llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 				       (unsigned long long)res->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 				       (unsigned long long)resource_size(res));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	out += sprintf(out, "Free resources: bus numbers\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	for (busnr = bus->busn_res.start; busnr <= bus->busn_res.end; busnr++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 		if (!pci_find_bus(pci_domain_nr(bus), busnr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	if (busnr < bus->busn_res.end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 		out += sprintf(out, "start = %8.8x, length = %8.8x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 				busnr, (int)(bus->busn_res.end - busnr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	return out - buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static DEVICE_ATTR(ctrl, S_IRUGO, show_ctrl, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int shpchp_create_ctrl_files(struct controller *ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	return device_create_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) void shpchp_remove_ctrl_files(struct controller *ctrl)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 	device_remove_file(&ctrl->pci_dev->dev, &dev_attr_ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }