Am Dienstag, den 05.06.2018, 20:10 +0200 schrieb Oleksij Rempel:
> > From: Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>
>
> this partition contains calibration data for WiFi and
> some board specific data, like MAC address.
>
> For now we care only about MAC.
I think you mentioned that this partition has some kind of CRC. Would
be nice to handle this, as it would add a bit more robustness.
>
> > Signed-off-by: Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>
> ---
> arch/mips/mach-ath79/Makefile | 1 +
> arch/mips/mach-ath79/art.c | 110 ++++++++++++++++++++++++++++++++++
> 2 files changed, 111 insertions(+)
> create mode 100644 arch/mips/mach-ath79/art.c
>
> diff --git a/arch/mips/mach-ath79/Makefile b/arch/mips/mach-ath79/Makefile
> index 3772daeba..b827b363c 100644
> --- a/arch/mips/mach-ath79/Makefile
> +++ b/arch/mips/mach-ath79/Makefile
> @@ -1,2 +1,3 @@
> obj-y += reset.o
> obj-y += bbu.o
> +obj-y += art.o
> diff --git a/arch/mips/mach-ath79/art.c b/arch/mips/mach-ath79/art.c
> new file mode 100644
> index 000000000..cf482f8fb
> --- /dev/null
> +++ b/arch/mips/mach-ath79/art.c
> @@ -0,0 +1,110 @@
> +// SPDX-License-Identifier: GPL-2.
Incomplete SPDX tag.
> +/*
> > + * Copyright (c) 2018 Oleksij Rempel <linux@xxxxxxxxxxxxxxxx>
> + */
> +
> +#include <common.h>
> +#include <fcntl.h>
> +#include <init.h>
> +#include <libfile.h>
> +#include <net.h>
> +#include <unistd.h>
> +
> +struct ar9300_eeprom {
> > + u8 eeprom_version;
> > + u8 template_version;
> > + u8 mac_addr[6];
> +};
> +
> +static int art_set_mac(struct device_d *dev, struct ar9300_eeprom *eeprom)
> +{
> > + struct device_node *node = dev->device_node;
> > + struct device_node *rnode;
> +
> > + if (!node)
> > + return -ENOENT;
> +
> > + rnode = of_parse_phandle_from(node, NULL,
> > + "barebox,provide-mac-address", 0);
> > + if (!rnode)
> > + return -ENOENT;
> +
> > + of_eth_register_ethaddr(rnode, &eeprom->mac_addr[0]);
> +
> > + return 0;
> +}
> +
> +static int art_read_mac(struct device_d *dev, const char *file)
> +{
> > + int fd, rbytes;
> > + struct ar9300_eeprom eeprom;
> +
> > + fd = open_and_lseek(file, O_RDONLY, 0x1000);
> > + if (fd < 0) {
> > + dev_err(dev, "Failed to open eeprom path %s %d\n",
> > + file, -errno);
> > + return -errno;
> > + }
> +
> > + rbytes = read_full(fd, &eeprom, sizeof(eeprom));
> > + close(fd);
> > + if (rbytes <= 0 || rbytes < sizeof(eeprom)) {
> > + dev_err(dev, "Failed to read %s\n", file);
> > + return -EIO;
> > + }
> +
> > + dev_dbg(dev, "ART version: %x.%x\n",
> > + eeprom.eeprom_version, eeprom.template_version);
> > + dev_dbg(dev, "mac: %02x:%02x:%02x:%02x:%02x:%02x\n",
> > + eeprom.mac_addr[0],
> > + eeprom.mac_addr[1],
> > + eeprom.mac_addr[2],
> > + eeprom.mac_addr[3],
> > + eeprom.mac_addr[4],
> > + eeprom.mac_addr[5]);
> +
> > + if (!is_valid_ether_addr(&eeprom.mac_addr[0])) {
> > + dev_err(dev, "bad MAC addr\n");
> > + return -EILSEQ;
> > + }
> +
> > + return art_set_mac(dev, &eeprom);
> +}
> +
> +static int art_probe(struct device_d *dev)
> +{
> > + char *path;
> > + int ret;
> +
> > + dev_dbg(dev, "found ART partition\n");
> +
> > + ret = of_find_path(dev->device_node, "device-path", &path, 0);
> > + if (ret) {
> > + dev_err(dev, "can't find path\n");
> > + return ret;
> > + }
> +
> > + return art_read_mac(dev, path);
> +}
> +
> +static struct of_device_id art_dt_ids[] = {
> > + {
> > + .compatible = "qca,art",
> > + }, {
> > + /* sentinel */
> > + }
> +};
> +
> +static struct driver_d art_driver = {
> > > + .name = "qca-art",
> > > + .probe = art_probe,
> > > + .of_compatible = art_dt_ids,
> +};
> +
> +static int art_of_driver_init(void)
> +{
> > + platform_driver_register(&art_driver);
> +
> > + return 0;
> +}
> +late_initcall(art_of_driver_init);
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