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fdt_phy.c revision 1.5.4.1
      1  1.5.4.1    martin /* $NetBSD: fdt_phy.c,v 1.5.4.1 2019/11/27 13:46:45 martin Exp $ */
      2      1.1  jmcneill 
      3      1.1  jmcneill /*-
      4      1.1  jmcneill  * Copyright (c) 2015-2017 Jared McNeill <jmcneill (at) invisible.ca>
      5      1.1  jmcneill  * All rights reserved.
      6      1.1  jmcneill  *
      7      1.1  jmcneill  * Redistribution and use in source and binary forms, with or without
      8      1.1  jmcneill  * modification, are permitted provided that the following conditions
      9      1.1  jmcneill  * are met:
     10      1.1  jmcneill  * 1. Redistributions of source code must retain the above copyright
     11      1.1  jmcneill  *    notice, this list of conditions and the following disclaimer.
     12      1.1  jmcneill  * 2. Redistributions in binary form must reproduce the above copyright
     13      1.1  jmcneill  *    notice, this list of conditions and the following disclaimer in the
     14      1.1  jmcneill  *    documentation and/or other materials provided with the distribution.
     15      1.1  jmcneill  *
     16      1.1  jmcneill  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17      1.1  jmcneill  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18      1.1  jmcneill  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19      1.1  jmcneill  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20      1.1  jmcneill  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21      1.1  jmcneill  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22      1.1  jmcneill  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23      1.1  jmcneill  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24      1.1  jmcneill  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25      1.1  jmcneill  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26      1.1  jmcneill  * SUCH DAMAGE.
     27      1.1  jmcneill  */
     28      1.1  jmcneill 
     29      1.1  jmcneill #include <sys/cdefs.h>
     30  1.5.4.1    martin __KERNEL_RCSID(0, "$NetBSD: fdt_phy.c,v 1.5.4.1 2019/11/27 13:46:45 martin Exp $");
     31      1.1  jmcneill 
     32      1.1  jmcneill #include <sys/param.h>
     33      1.1  jmcneill #include <sys/bus.h>
     34      1.1  jmcneill #include <sys/kmem.h>
     35      1.2  jmcneill #include <sys/queue.h>
     36      1.1  jmcneill 
     37      1.1  jmcneill #include <libfdt.h>
     38      1.1  jmcneill #include <dev/fdt/fdtvar.h>
     39      1.1  jmcneill 
     40      1.1  jmcneill struct fdtbus_phy_controller {
     41      1.1  jmcneill 	device_t pc_dev;
     42      1.1  jmcneill 	int pc_phandle;
     43      1.1  jmcneill 	const struct fdtbus_phy_controller_func *pc_funcs;
     44      1.1  jmcneill 
     45      1.2  jmcneill 	LIST_ENTRY(fdtbus_phy_controller) pc_next;
     46      1.1  jmcneill };
     47      1.1  jmcneill 
     48      1.2  jmcneill static LIST_HEAD(, fdtbus_phy_controller) fdtbus_phy_controllers =
     49      1.2  jmcneill     LIST_HEAD_INITIALIZER(fdtbus_phy_controllers);
     50      1.1  jmcneill 
     51      1.1  jmcneill int
     52      1.1  jmcneill fdtbus_register_phy_controller(device_t dev, int phandle,
     53      1.1  jmcneill     const struct fdtbus_phy_controller_func *funcs)
     54      1.1  jmcneill {
     55      1.1  jmcneill 	struct fdtbus_phy_controller *pc;
     56      1.1  jmcneill 
     57      1.1  jmcneill 	pc = kmem_alloc(sizeof(*pc), KM_SLEEP);
     58      1.1  jmcneill 	pc->pc_dev = dev;
     59      1.1  jmcneill 	pc->pc_phandle = phandle;
     60      1.1  jmcneill 	pc->pc_funcs = funcs;
     61      1.1  jmcneill 
     62      1.2  jmcneill 	LIST_INSERT_HEAD(&fdtbus_phy_controllers, pc, pc_next);
     63      1.1  jmcneill 
     64      1.1  jmcneill 	return 0;
     65      1.1  jmcneill }
     66      1.1  jmcneill 
     67      1.1  jmcneill static struct fdtbus_phy_controller *
     68      1.1  jmcneill fdtbus_get_phy_controller(int phandle)
     69      1.1  jmcneill {
     70      1.1  jmcneill 	struct fdtbus_phy_controller *pc;
     71      1.1  jmcneill 
     72      1.2  jmcneill 	LIST_FOREACH(pc, &fdtbus_phy_controllers, pc_next) {
     73      1.2  jmcneill 		if (pc->pc_phandle == phandle)
     74      1.1  jmcneill 			return pc;
     75      1.1  jmcneill 	}
     76      1.1  jmcneill 
     77      1.1  jmcneill 	return NULL;
     78      1.1  jmcneill }
     79      1.1  jmcneill 
     80      1.1  jmcneill struct fdtbus_phy *
     81      1.1  jmcneill fdtbus_phy_get_index(int phandle, u_int index)
     82      1.1  jmcneill {
     83      1.1  jmcneill 	struct fdtbus_phy_controller *pc;
     84      1.1  jmcneill 	struct fdtbus_phy *phy = NULL;
     85      1.1  jmcneill 	void *phy_priv = NULL;
     86      1.1  jmcneill 	uint32_t *phys = NULL;
     87      1.1  jmcneill 	uint32_t *p;
     88      1.1  jmcneill 	u_int n, phy_cells;
     89      1.1  jmcneill 	int len, resid;
     90      1.1  jmcneill 
     91      1.1  jmcneill 	len = OF_getproplen(phandle, "phys");
     92      1.1  jmcneill 	if (len <= 0)
     93      1.1  jmcneill 		return NULL;
     94      1.1  jmcneill 
     95      1.1  jmcneill 	phys = kmem_alloc(len, KM_SLEEP);
     96      1.1  jmcneill 	if (OF_getprop(phandle, "phys", phys, len) != len) {
     97      1.1  jmcneill 		kmem_free(phys, len);
     98      1.1  jmcneill 		return NULL;
     99      1.1  jmcneill 	}
    100      1.1  jmcneill 
    101      1.1  jmcneill 	p = phys;
    102      1.1  jmcneill 	for (n = 0, resid = len; resid > 0; n++) {
    103  1.5.4.1    martin 		if (p[0] == 0) {
    104  1.5.4.1    martin 			phy_cells = 0;
    105  1.5.4.1    martin 			goto next;
    106  1.5.4.1    martin 		}
    107      1.1  jmcneill 		const int pc_phandle =
    108      1.1  jmcneill 		    fdtbus_get_phandle_from_native(be32toh(p[0]));
    109      1.1  jmcneill 		if (of_getprop_uint32(pc_phandle, "#phy-cells", &phy_cells))
    110      1.1  jmcneill 			break;
    111      1.1  jmcneill 		if (n == index) {
    112      1.1  jmcneill 			pc = fdtbus_get_phy_controller(pc_phandle);
    113      1.1  jmcneill 			if (pc == NULL)
    114      1.1  jmcneill 				goto done;
    115      1.1  jmcneill 			phy_priv = pc->pc_funcs->acquire(pc->pc_dev,
    116      1.1  jmcneill 			    phy_cells > 0 ? &p[1] : NULL, phy_cells * 4);
    117      1.1  jmcneill 			if (phy_priv) {
    118      1.1  jmcneill 				phy = kmem_alloc(sizeof(*phy), KM_SLEEP);
    119      1.1  jmcneill 				phy->phy_pc = pc;
    120      1.1  jmcneill 				phy->phy_priv = phy_priv;
    121      1.1  jmcneill 			}
    122      1.1  jmcneill 			break;
    123      1.1  jmcneill 		}
    124  1.5.4.1    martin next:
    125      1.1  jmcneill 		resid -= (phy_cells + 1) * 4;
    126      1.1  jmcneill 		p += phy_cells + 1;
    127      1.1  jmcneill 	}
    128      1.1  jmcneill 
    129      1.1  jmcneill done:
    130      1.1  jmcneill 	if (phys)
    131      1.1  jmcneill 		kmem_free(phys, len);
    132      1.1  jmcneill 
    133      1.1  jmcneill 	return phy;
    134      1.1  jmcneill }
    135      1.1  jmcneill 
    136      1.1  jmcneill struct fdtbus_phy *
    137      1.1  jmcneill fdtbus_phy_get(int phandle, const char *phyname)
    138      1.1  jmcneill {
    139      1.1  jmcneill 	u_int index;
    140      1.5  jakllsch 	int err;
    141      1.1  jmcneill 
    142      1.5  jakllsch 	err = fdtbus_get_index(phandle, "phy-names", phyname, &index);
    143      1.5  jakllsch 	if (err != 0)
    144      1.1  jmcneill 		return NULL;
    145      1.1  jmcneill 
    146      1.5  jakllsch 	return fdtbus_phy_get_index(phandle, index);
    147      1.1  jmcneill }
    148      1.1  jmcneill 
    149      1.1  jmcneill void
    150      1.1  jmcneill fdtbus_phy_put(struct fdtbus_phy *phy)
    151      1.1  jmcneill {
    152      1.1  jmcneill 	struct fdtbus_phy_controller *pc = phy->phy_pc;
    153      1.1  jmcneill 
    154      1.1  jmcneill 	pc->pc_funcs->release(pc->pc_dev, phy->phy_priv);
    155      1.1  jmcneill 	kmem_free(phy, sizeof(*phy));
    156      1.1  jmcneill }
    157      1.1  jmcneill 
    158      1.3  jmcneill device_t
    159      1.3  jmcneill fdtbus_phy_device(struct fdtbus_phy *phy)
    160      1.3  jmcneill {
    161      1.3  jmcneill 	return phy->phy_pc->pc_dev;
    162      1.3  jmcneill }
    163      1.3  jmcneill 
    164      1.1  jmcneill int
    165      1.1  jmcneill fdtbus_phy_enable(struct fdtbus_phy *phy, bool enable)
    166      1.1  jmcneill {
    167      1.1  jmcneill 	struct fdtbus_phy_controller *pc = phy->phy_pc;
    168      1.1  jmcneill 
    169      1.1  jmcneill 	return pc->pc_funcs->enable(pc->pc_dev, phy->phy_priv, enable);
    170      1.1  jmcneill }
    171