29  * This is a generic syscon driver, whose purpose is to provide access to
58 #include "syscon.h"
61  * Syscon interface details
63 typedef TAILQ_HEAD(syscon_list, syscon) syscon_list_t;
68 static int syscon_method_init(struct syscon *syscon);
69 static int syscon_method_uninit(struct syscon *syscon);
70 static uint32_t syscon_method_read_4(struct syscon *syscon, bus_size_t offset);
71 static int syscon_method_write_4(struct syscon *syscon, bus_size_t offset,
73 static int syscon_method_modify_4(struct syscon *syscon, bus_size_t offset,
77 MALLOC_DEFINE(M_SYSCON, "syscon", "Syscon driver");
81 SX_SYSINIT(syscon_topology, &syscon_topo_lock, "Syscon topology lock");
84  * Syscon methods.
95 DEFINE_CLASS_0(syscon, syscon_class, syscon_methods, 0);
104  * Default syscon methods for base class.
107 syscon_method_init(struct syscon *syscon)  in syscon_method_init()  argument
114 syscon_method_uninit(struct syscon *syscon)  in syscon_method_uninit()  argument
121 syscon_get_softc(struct syscon *syscon)  in syscon_get_softc()  argument
124 	return (syscon->softc);  in syscon_get_softc()
128 syscon_method_read_4(struct syscon *syscon, bus_size_t offset)  in syscon_method_read_4()  argument
132 	SYSCON_DEVICE_LOCK(syscon->pdev);  in syscon_method_read_4()
133 	val = SYSCON_UNLOCKED_READ_4(syscon, offset);  in syscon_method_read_4()
134 	SYSCON_DEVICE_UNLOCK(syscon->pdev);  in syscon_method_read_4()
139 syscon_method_write_4(struct syscon *syscon, bus_size_t offset, uint32_t val)  in syscon_method_write_4()  argument
143 	SYSCON_DEVICE_LOCK(syscon->pdev);  in syscon_method_write_4()
144 	rv = SYSCON_UNLOCKED_WRITE_4(syscon, offset, val);  in syscon_method_write_4()
145 	SYSCON_DEVICE_UNLOCK(syscon->pdev);  in syscon_method_write_4()
150 syscon_method_modify_4(struct syscon *syscon, bus_size_t offset,  in syscon_method_modify_4()  argument
155 	SYSCON_DEVICE_LOCK(syscon->pdev);  in syscon_method_modify_4()
156 	rv = SYSCON_UNLOCKED_MODIFY_4(syscon, offset, clear_bits, set_bits);  in syscon_method_modify_4()
157 	SYSCON_DEVICE_UNLOCK(syscon->pdev);  in syscon_method_modify_4()
161  * Create and initialize syscon object, but do not register it.
163 struct syscon *
166 	struct syscon *syscon;  in syscon_create()  local
169 	syscon = malloc(sizeof(struct syscon), M_SYSCON,  in syscon_create()
171 	kobj_init((kobj_t)syscon, (kobj_class_t)syscon_class);  in syscon_create()
175 		syscon->softc = malloc(syscon_class->size, M_SYSCON,  in syscon_create()
179 	syscon->pdev = pdev;  in syscon_create()
180 	return (syscon);  in syscon_create()
183 /* Register syscon object. */
184 struct syscon *
185 syscon_register(struct syscon *syscon)  in syscon_register()  argument
190 	if (syscon->ofw_node <= 0)  in syscon_register()
191 		syscon->ofw_node = ofw_bus_get_node(syscon->pdev);  in syscon_register()
192 	if (syscon->ofw_node <= 0)  in syscon_register()
196 	rv = SYSCON_INIT(syscon);  in syscon_register()
203 	OF_device_register_xref(OF_xref_from_node(syscon->ofw_node),  in syscon_register()
204 	    syscon->pdev);  in syscon_register()
207 	TAILQ_INSERT_TAIL(&syscon_list, syscon, syscon_link);  in syscon_register()
209 	return (syscon);  in syscon_register()
213 syscon_unregister(struct syscon *syscon)  in syscon_unregister()  argument
217 	TAILQ_REMOVE(&syscon_list, syscon, syscon_link);  in syscon_unregister()
220 	OF_device_register_xref(OF_xref_from_node(syscon->ofw_node), NULL);  in syscon_unregister()
222 	return (SYSCON_UNINIT(syscon));  in syscon_unregister()
229 static struct syscon *
232 	struct syscon *entry;  in syscon_find_by_ofw_node()
244 struct syscon *
248 	struct syscon *syscon;  in syscon_create_ofw_node()  local
250 	syscon = syscon_create(pdev, syscon_class);  in syscon_create_ofw_node()
251 	if (syscon == NULL)  in syscon_create_ofw_node()
253 	syscon->ofw_node = node;  in syscon_create_ofw_node()
254 	if (syscon_register(syscon) == NULL)  in syscon_create_ofw_node()
256 	return (syscon);  in syscon_create_ofw_node()
260 syscon_get_ofw_node(struct syscon *syscon)  in syscon_get_ofw_node()  argument
263 	return (syscon->ofw_node);  in syscon_get_ofw_node()
267 syscon_get_by_ofw_node(device_t cdev, phandle_t node, struct syscon **syscon)  in syscon_get_by_ofw_node()  argument
271 	*syscon = syscon_find_by_ofw_node(node);  in syscon_get_by_ofw_node()
272 	if (*syscon == NULL) {  in syscon_get_by_ofw_node()
274 		device_printf(cdev, "Failed to find syscon node\n");  in syscon_get_by_ofw_node()
283     struct syscon **syscon)  in syscon_get_by_ofw_property()  argument
300 	/* Translate to syscon node. */  in syscon_get_by_ofw_property()
302 	*syscon = syscon_find_by_ofw_node(OF_node_from_xref(cells[0]));  in syscon_get_by_ofw_property()
303 	if (*syscon == NULL) {  in syscon_get_by_ofw_property()
305 		device_printf(cdev, "Failed to find syscon node\n");  in syscon_get_by_ofw_property()