Add a generic pinctrl "framework".

ok patrick@

diff --git a/sys/dev/ofw/ofw_pinctrl.c b/sys/dev/ofw/ofw_pinctrl.c
new file mode 100644 (file)
index 0000000..bee5454
--- /dev/null
+++ b/sys/dev/ofw/ofw_pinctrl.c
@@ -0,0 +1,123 @@
+/*     $OpenBSD: ofw_pinctrl.c,v 1.1 2016/08/06 17:12:34 kettenis Exp $        */
+/*
+ * Copyright (c) 2016 Mark Kettenis
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_pinctrl.h>
+
+struct pinctrl {
+       int     pc_phandle;
+       int     (*pc_pinctrl)(uint32_t, void *);
+       void    *pc_cookie;
+
+       LIST_ENTRY(pinctrl) pc_list;
+};
+
+void pinctrl_register_child(int, int (*)(uint32_t, void *), void *);
+
+LIST_HEAD(, pinctrl) pinctrls = LIST_HEAD_INITIALIZER(pinctrl);
+
+void
+pinctrl_register(int node, int (*pinctrl)(uint32_t, void *), void *cookie)
+{
+       for (node = OF_child(node); node; node = OF_peer(node))
+               pinctrl_register_child(node, pinctrl, cookie);
+}
+
+void
+pinctrl_register_child(int node, int (*pinctrl)(uint32_t, void *), void *cookie)
+{
+       struct pinctrl *pc;
+       uint32_t phandle;
+
+       phandle = OF_getpropint(node, "phandle", 0);
+       if (phandle) {
+               pc = malloc(sizeof(struct pinctrl), M_DEVBUF, M_WAITOK);
+               pc->pc_phandle = phandle;
+               pc->pc_pinctrl = pinctrl;
+               pc->pc_cookie = cookie;
+               LIST_INSERT_HEAD(&pinctrls, pc, pc_list);
+       }
+
+       for (node = OF_child(node); node; node = OF_peer(node))
+               pinctrl_register_child(node, pinctrl, cookie);
+}
+
+int
+pinctrl_byphandle(uint32_t phandle)
+{
+       struct pinctrl *pc;
+
+       LIST_FOREACH(pc, &pinctrls, pc_list) {
+               if (pc->pc_phandle == phandle)
+                       return pc->pc_pinctrl(pc->pc_phandle, pc->pc_cookie);
+       }
+
+       return -1;
+}
+
+int
+pinctrl_byid(int node, int id)
+{
+       char pinctrl[32];
+       uint32_t *phandles;
+       int len, i;
+
+       snprintf(pinctrl, sizeof(pinctrl), "pinctrl-%d", id);
+       len = OF_getproplen(node, pinctrl);
+       if (len <= 0)
+               return -1;
+
+       phandles = malloc(len, M_TEMP, M_WAITOK);
+       OF_getpropintarray(node, pinctrl, phandles, len);
+       for (i = 0; i < len / sizeof(uint32_t); i++)
+               pinctrl_byphandle(phandles[i]);
+       free(phandles, M_TEMP, len);
+       return 0;
+}
+
+int
+pinctrl_byname(int node, const char *config)
+{
+       char *names;
+       char *name;
+       char *end;
+       int id = 0;
+       int len;
+
+       len = OF_getproplen(node, "pinctrl-names");
+       if (len <= 0)
+               return -1;
+
+       names = malloc(len, M_TEMP, M_WAITOK);
+       OF_getprop(node, "pinctrl-names", names, len);
+       end = names + len;
+       name = names;
+       while (name < end) {
+               if (strcmp(name, config) == 0) {
+                       free(names, M_TEMP, len);
+                       return pinctrl_byid(node, id);
+               }
+               name += strlen(name) + 1;
+               id++;
+       }
+       free(names, M_TEMP, len);
+       return -1;
+}

diff --git a/sys/dev/ofw/ofw_pinctrl.h b/sys/dev/ofw/ofw_pinctrl.h
new file mode 100644 (file)
index 0000000..503beef
--- /dev/null
+++ b/sys/dev/ofw/ofw_pinctrl.h
@@ -0,0 +1,27 @@
+/*     $OpenBSD: ofw_pinctrl.h,v 1.1 2016/08/06 17:12:34 kettenis Exp $        */
+/*
+ * Copyright (c) 2016 Mark Kettenis
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _DEV_OFW_PINCTRL_H_
+#define _DEV_OFW_PINCTRL_H_
+
+void   pinctrl_register(int, int (*)(uint32_t, void *), void *);
+
+int    pinctrl_byphandle(uint32_t);
+int    pinctrl_byid(int, int);
+int    pinctrl_byname(int, const char *);
+
+#endif /* _DEV_OFW_GPIO_H_ */