3  * Routines for tracking a legacy ISA bridge
29 #include <asm/isa-bridge.h>
31 unsigned long isa_io_base;	/* NULL if no ISA bus */
34 /* Cached ISA bridge dev. */
73 			pr_err("ISA: Bad CPU mapping: %s\n", __func__);  in process_ISA_OF_ranges()
79 			pr_warn("ISA: bridge %pOF has non aligned IO range\n", isa_node);  in process_ISA_OF_ranges()
97 		pr_err("no ISA IO ranges or unexpected isa range, mapping 64k\n");  in process_ISA_OF_ranges()
106  * isa_bridge_find_early - Find and map the ISA IO space early before
109  *                         access to ISA IO ports
115 	/* If we already have an ISA bridge, bail off */  in isa_bridge_find_early()
119 	/* For each "isa" node in the system. Note : we do a search by  in isa_bridge_find_early()
124 	for_each_node_by_type(np, "isa") {  in isa_bridge_find_early()
142 	/* Now parse the "ranges" property and setup the ISA mapping */  in isa_bridge_find_early()
145 	/* Set the global ISA io base to indicate we have an ISA bridge */  in isa_bridge_find_early()
148 	pr_debug("ISA bridge (early) is %pOF\n", np);  in isa_bridge_find_early()
152  * isa_bridge_find_early - Find and map the ISA IO space early before
155  *                         access to ISA IO ports
161 	/* If we already have an ISA bridge, bail off */  in isa_bridge_init_non_pci()
172 	/* Set the global ISA io base to indicate we have an ISA bridge  in isa_bridge_init_non_pci()
177 	pr_debug("ISA: Non-PCI bridge is %pOF\n", np);  in isa_bridge_init_non_pci()
181  * isa_bridge_find_late - Find and map the ISA IO space upon discovery of
182  *                        a new ISA bridge
189 	/* Store ISA device node and PCI device */  in isa_bridge_find_late()
193 	/* Now parse the "ranges" property and setup the ISA mapping */  in isa_bridge_find_late()
196 	/* Set the global ISA io base to indicate we have an ISA bridge */  in isa_bridge_find_late()
199 	pr_debug("ISA bridge (late) is %pOF on %s\n",  in isa_bridge_find_late()
204  * isa_bridge_remove - Remove/unmap an ISA bridge
208 	pr_debug("ISA bridge removed !\n");  in isa_bridge_remove()
210 	/* Clear the global ISA io base to indicate that we have no more  in isa_bridge_remove()
211 	 * ISA bridge. Note that drivers don't quite handle that, though  in isa_bridge_remove()
213 	 * have ISA bridges being removed on machines using legacy devices ?  in isa_bridge_remove()
222 	/* Unmap the ISA area */  in isa_bridge_remove()
238 		/* Check if we have an early ISA device, without PCI dev */  in isa_bridge_notify()
241 			pr_debug("ISA bridge PCI attached: %s\n",  in isa_bridge_notify()
246 		/* Check if we have no ISA device, and this happens to be one,  in isa_bridge_notify()
249 		if (!isa_bridge_devnode && of_node_is_type(devnode, "isa"))  in isa_bridge_notify()
254 		/* Check if this our existing ISA device */  in isa_bridge_notify()
268  * isa_bridge_init - register to be notified of ISA bridge addition/removal