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[src/thorpej-i2c-spi-conf]: src/sys/dev/ofw Implement "i2c-enumerate-devices"...
details: https://anonhg.NetBSD.org/src/rev/68d742fbca05
branches: thorpej-i2c-spi-conf
changeset: 961939:68d742fbca05
user: thorpej <thorpej%NetBSD.org@localhost>
date: Sun Apr 25 22:16:05 2021 +0000
description:
Implement "i2c-enumerate-devices" for OFW / FDT.
diffstat:
sys/dev/ofw/ofw_i2c_subr.c | 151 ++++++++++++++++++++++++++++----------------
sys/dev/ofw/openfirm.h | 5 +-
2 files changed, 99 insertions(+), 57 deletions(-)
diffs (198 lines):
diff -r 7b49a01a62e2 -r 68d742fbca05 sys/dev/ofw/ofw_i2c_subr.c
--- a/sys/dev/ofw/ofw_i2c_subr.c Sun Apr 25 22:02:59 2021 +0000
+++ b/sys/dev/ofw/ofw_i2c_subr.c Sun Apr 25 22:16:05 2021 +0000
@@ -1,4 +1,30 @@
-/* $NetBSD: ofw_i2c_subr.c,v 1.1 2021/02/04 20:19:09 thorpej Exp $ */
+/* $NetBSD: ofw_i2c_subr.c,v 1.1.6.1 2021/04/25 22:16:05 thorpej Exp $ */
+
+/*
+ * Copyright (c) 2021 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
/*
* Copyright 1998
@@ -34,7 +60,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ofw_i2c_subr.c,v 1.1 2021/02/04 20:19:09 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ofw_i2c_subr.c,v 1.1.6.1 2021/04/25 22:16:05 thorpej Exp $");
#include <sys/param.h>
#include <sys/device.h>
@@ -44,66 +70,81 @@
#include <dev/i2c/i2cvar.h>
/*
- * Iterate over the subtree of a i2c controller node.
- * Add all sub-devices into an array as part of the controller's
- * device properties.
- * This is used by the i2c bus attach code to do direct configuration.
+ * Standard routine for fetching an i2c device address, according
+ * to the standard OpenFirmware / Device Tree bindings.
*/
-void
-of_enter_i2c_devs(prop_dictionary_t props, int ofnode, size_t cell_size,
- int addr_shift)
+static bool
+of_i2c_get_address(int node, uint32_t *addrp)
{
- int node, len;
- char name[32];
- uint64_t reg64;
- uint32_t reg32;
- uint64_t addr;
- prop_array_t array = NULL;
- prop_dictionary_t dev;
+ uint32_t reg;
+
+ if (of_getprop_uint32(node, "reg", ®) == -1) {
+ return false;
+ }
+
+ *addrp = reg;
+ return true;
+}
- for (node = OF_child(ofnode); node; node = OF_peer(node)) {
- if (OF_getprop(node, "name", name, sizeof(name)) <= 0)
- continue;
- len = OF_getproplen(node, "reg");
- addr = 0;
- if (cell_size == 8 && len >= sizeof(reg64)) {
- if (OF_getprop(node, "reg", ®64, sizeof(reg64))
- < sizeof(reg64))
- continue;
- addr = be64toh(reg64);
- /*
- * The i2c bus number (0 or 1) is encoded in bit 33
- * of the register, but we encode it in bit 8 of
- * i2c_addr_t.
- */
- if (addr & 0x100000000)
- addr = (addr & 0xff) | 0x100;
- } else if (cell_size == 4 && len >= sizeof(reg32)) {
- if (OF_getprop(node, "reg", ®32, sizeof(reg32))
- < sizeof(reg32))
- continue;
- addr = be32toh(reg32);
- } else {
+static int
+of_i2c_enumerate_devices(device_t dev, devhandle_t call_handle, void *v)
+{
+ return of_i2c_enumerate_devices_ext(dev, call_handle, v,
+ of_i2c_get_address);
+}
+OF_DEVICE_CALL_REGISTER("i2c-enumerate-devices", of_i2c_enumerate_devices);
+
+int
+of_i2c_enumerate_devices_ext(device_t dev, devhandle_t call_handle, void *v,
+ bool (*get_address)(int, uint32_t *))
+{
+ struct i2c_enumerate_devices_args *args = v;
+ int i2c_node, node;
+ char name[32], compat_buf[32];
+ prop_dictionary_t props;
+ uint32_t addr;
+ char *clist;
+ int clist_size;
+ bool cbrv;
+
+ i2c_node = devhandle_to_of(call_handle);
+
+ for (node = OF_child(i2c_node); node != 0; node = OF_peer(node)) {
+ if (OF_getprop(node, "name", name, sizeof(name)) <= 0) {
continue;
}
- addr >>= addr_shift;
- if (addr == 0) continue;
+ if (!get_address(node, &addr)) {
+ continue;
+ }
- if (array == NULL)
- array = prop_array_create();
+ clist_size = OF_getproplen(node, "compatible");
+ clist = kmem_tmpbuf_alloc(clist_size,
+ compat_buf, sizeof(compat_buf), KM_SLEEP);
+ if (OF_getprop(node, "compatible", clist, clist_size) <
+ clist_size) {
+ kmem_tmpbuf_free(clist, clist_size, compat_buf);
+ continue;
+ }
+ props = prop_dictionary_create();
- dev = prop_dictionary_create();
- prop_dictionary_set_string(dev, "name", name);
- prop_dictionary_set_uint32(dev, "addr", addr);
- prop_dictionary_set_uint64(dev, "cookie", node);
- prop_dictionary_set_uint32(dev, "cookietype", I2C_COOKIE_OF);
- of_to_dataprop(dev, node, "compatible", "compatible");
- prop_array_add(array, dev);
- prop_object_release(dev);
+ args->ia->ia_addr = (i2c_addr_t)addr;
+ args->ia->ia_name = name;
+ args->ia->ia_clist = clist;
+ args->ia->ia_clist_size = clist_size;
+ args->ia->ia_prop = props;
+ args->ia->ia_devhandle = devhandle_from_of(node);
+ args->ia->ia_cookie = node; /* XXX */
+ args->ia->ia_cookietype = I2C_COOKIE_OF; /* XXX */
+
+ cbrv = args->callback(dev, args);
+
+ prop_object_release(props);
+ kmem_tmpbuf_free(clist, clist_size, compat_buf);
+
+ if (!cbrv) {
+ break;
+ }
}
- if (array != NULL) {
- prop_dictionary_set(props, "i2c-child-devices", array);
- prop_object_release(array);
- }
+ return 0;
}
diff -r 7b49a01a62e2 -r 68d742fbca05 sys/dev/ofw/openfirm.h
--- a/sys/dev/ofw/openfirm.h Sun Apr 25 22:02:59 2021 +0000
+++ b/sys/dev/ofw/openfirm.h Sun Apr 25 22:16:05 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: openfirm.h,v 1.47 2021/04/24 23:36:57 thorpej Exp $ */
+/* $NetBSD: openfirm.h,v 1.47.2.1 2021/04/25 22:16:05 thorpej Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@@ -129,7 +129,8 @@
int *of_network_decode_media(int, int *, int *);
char *of_get_mode_string(char *, int);
-void of_enter_i2c_devs(prop_dictionary_t, int, size_t, int);
+int of_i2c_enumerate_devices_ext(device_t, devhandle_t, void *,
+ bool (*)(int, uint32_t *));
void of_enter_spi_devs(prop_dictionary_t, int, size_t);
#endif /* _KERNEL */
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