mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-23 19:43:33 +00:00
101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0+
|
||
|
|
/*
|
||
|
|
* (C) Copyright 2021
|
||
|
|
* Köry Maincent, Bootlin, <kory.maincent@bootlin.com>
|
||
|
|
* Based on initial code from Maxime Ripard
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <common.h>
|
||
|
|
#include <malloc.h>
|
||
|
|
#include <dm.h>
|
||
|
|
#include <w1.h>
|
||
|
|
#include <w1-eeprom.h>
|
||
|
|
#include <dm/device-internal.h>
|
||
|
|
|
||
|
|
#include <asm/arch/gpio.h>
|
||
|
|
|
||
|
|
#include <extension_board.h>
|
||
|
|
|
||
|
|
#define for_each_w1_device(b, d) \
|
||
|
|
for (device_find_first_child(b, d); *d; device_find_next_child(d))
|
||
|
|
|
||
|
|
#define dip_convert(field) \
|
||
|
|
( \
|
||
|
|
(sizeof(field) == 1) ? field : \
|
||
|
|
(sizeof(field) == 2) ? be16_to_cpu(field) : \
|
||
|
|
(sizeof(field) == 4) ? be32_to_cpu(field) : \
|
||
|
|
-1 \
|
||
|
|
)
|
||
|
|
|
||
|
|
#define DIP_MAGIC 0x50494843 /* CHIP */
|
||
|
|
|
||
|
|
struct dip_w1_header {
|
||
|
|
u32 magic; /* CHIP */
|
||
|
|
u8 version; /* spec version */
|
||
|
|
u32 vendor_id;
|
||
|
|
u16 product_id;
|
||
|
|
u8 product_version;
|
||
|
|
char vendor_name[32];
|
||
|
|
char product_name[32];
|
||
|
|
u8 rsvd[36]; /* rsvd for future spec versions */
|
||
|
|
u8 data[16]; /* user data, per-dip specific */
|
||
|
|
} __packed;
|
||
|
|
|
||
|
|
int extension_board_scan(struct list_head *extension_list)
|
||
|
|
{
|
||
|
|
struct extension *dip;
|
||
|
|
struct dip_w1_header w1_header;
|
||
|
|
struct udevice *bus, *dev;
|
||
|
|
u32 vid;
|
||
|
|
u16 pid;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
int num_dip = 0;
|
||
|
|
|
||
|
|
sunxi_gpio_set_pull(SUNXI_GPD(2), SUNXI_GPIO_PULL_UP);
|
||
|
|
|
||
|
|
ret = w1_get_bus(0, &bus);
|
||
|
|
if (ret) {
|
||
|
|
printf("one wire interface not found\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
for_each_w1_device(bus, &dev) {
|
||
|
|
if (w1_get_device_family(dev) != W1_FAMILY_DS2431)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
ret = device_probe(dev);
|
||
|
|
if (ret) {
|
||
|
|
printf("Couldn't probe device %s: error %d",
|
||
|
|
dev->name, ret);
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
w1_eeprom_read_buf(dev, 0, (u8 *)&w1_header, sizeof(w1_header));
|
||
|
|
|
||
|
|
if (w1_header.magic != DIP_MAGIC)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
vid = dip_convert(w1_header.vendor_id);
|
||
|
|
pid = dip_convert(w1_header.product_id);
|
||
|
|
|
||
|
|
printf("DIP: %s (0x%x) from %s (0x%x)\n",
|
||
|
|
w1_header.product_name, pid,
|
||
|
|
w1_header.vendor_name, vid);
|
||
|
|
|
||
|
|
dip = calloc(1, sizeof(struct extension));
|
||
|
|
if (!dip) {
|
||
|
|
printf("Error in memory allocation\n");
|
||
|
|
return num_dip;
|
||
|
|
}
|
||
|
|
|
||
|
|
snprintf(dip->overlay, sizeof(dip->overlay), "dip-%x-%x.dtbo",
|
||
|
|
vid, pid);
|
||
|
|
strncpy(dip->name, w1_header.product_name, 32);
|
||
|
|
strncpy(dip->owner, w1_header.vendor_name, 32);
|
||
|
|
list_add_tail(&dip->list, extension_list);
|
||
|
|
num_dip++;
|
||
|
|
}
|
||
|
|
return num_dip;
|
||
|
|
}
|