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https://github.com/u-boot/u-boot.git
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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2021
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* Köry Maincent, Bootlin, <kory.maincent@bootlin.com>
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* Based on initial code from Maxime Ripard
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*/
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#include <common.h>
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#include <malloc.h>
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#include <dm.h>
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#include <w1.h>
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#include <w1-eeprom.h>
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#include <dm/device-internal.h>
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#include <sunxi_gpio.h>
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#include <extension_board.h>
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#define for_each_w1_device(b, d) \
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for (device_find_first_child(b, d); *d; device_find_next_child(d))
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#define dip_convert(field) \
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( \
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(sizeof(field) == 1) ? field : \
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(sizeof(field) == 2) ? be16_to_cpu(field) : \
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(sizeof(field) == 4) ? be32_to_cpu(field) : \
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-1 \
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)
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#define DIP_MAGIC 0x50494843 /* CHIP */
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struct dip_w1_header {
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u32 magic; /* CHIP */
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u8 version; /* spec version */
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u32 vendor_id;
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u16 product_id;
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u8 product_version;
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char vendor_name[32];
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char product_name[32];
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u8 rsvd[36]; /* rsvd for future spec versions */
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u8 data[16]; /* user data, per-dip specific */
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} __packed;
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int extension_board_scan(struct list_head *extension_list)
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{
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struct extension *dip;
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struct dip_w1_header w1_header;
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struct udevice *bus, *dev;
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u32 vid;
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u16 pid;
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int ret;
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int num_dip = 0;
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sunxi_gpio_set_pull(SUNXI_GPD(2), SUNXI_GPIO_PULL_UP);
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ret = w1_get_bus(0, &bus);
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if (ret) {
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printf("one wire interface not found\n");
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return 0;
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}
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for_each_w1_device(bus, &dev) {
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if (w1_get_device_family(dev) != W1_FAMILY_DS2431)
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continue;
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ret = device_probe(dev);
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if (ret) {
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printf("Couldn't probe device %s: error %d",
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dev->name, ret);
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continue;
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}
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w1_eeprom_read_buf(dev, 0, (u8 *)&w1_header, sizeof(w1_header));
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if (w1_header.magic != DIP_MAGIC)
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continue;
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vid = dip_convert(w1_header.vendor_id);
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pid = dip_convert(w1_header.product_id);
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printf("DIP: %s (0x%x) from %s (0x%x)\n",
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w1_header.product_name, pid,
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w1_header.vendor_name, vid);
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dip = calloc(1, sizeof(struct extension));
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if (!dip) {
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printf("Error in memory allocation\n");
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return num_dip;
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}
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snprintf(dip->overlay, sizeof(dip->overlay), "dip-%x-%x.dtbo",
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vid, pid);
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strncpy(dip->name, w1_header.product_name, 32);
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strncpy(dip->owner, w1_header.vendor_name, 32);
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list_add_tail(&dip->list, extension_list);
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num_dip++;
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}
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return num_dip;
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}
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