From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fR112-0003Qa-S8 for barebox@lists.infradead.org; Thu, 07 Jun 2018 19:56:14 +0000 From: Oleksij Rempel Date: Thu, 7 Jun 2018 21:55:50 +0200 Message-Id: <20180607195552.15246-1-o.rempel@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH v2 1/3] MIPS: ath79: provide driver for Atheros ART partition To: barebox@lists.infradead.org Cc: Oleksij Rempel From: Oleksij Rempel this partition contains calibration data for WiFi and some board specific data, like MAC address. For now we care only about MAC. Signed-off-by: Oleksij Rempel --- arch/mips/mach-ath79/Makefile | 1 + arch/mips/mach-ath79/art.c | 112 ++++++++++++++++++++++++++++++++++ 2 files changed, 113 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..984d08736 --- /dev/null +++ b/arch/mips/mach-ath79/art.c @@ -0,0 +1,112 @@ +// SPDX-License-Identifier: GPL-2. +/* + * Copyright (c) 2018 Oleksij Rempel + */ + +#include +#include +#include +#include +#include +#include + +#define AR93000_EPPROM_OFFSET 0x1000 + +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, AR93000_EPPROM_OFFSET); + if (fd < 0) { + dev_err(dev, "Failed to open eeprom path %s %d\n", + file, fd); + return fd; + } + + rbytes = read_full(fd, &eeprom, sizeof(eeprom)); + close(fd); + if (rbytes < sizeof(eeprom)) { + dev_err(dev, "Failed to read %s\n", file); + return rbytes < 0 ? rbytes : -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); -- 2.17.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox