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author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2022-06-09 07:59:06 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2022-06-17 08:28:55 +0200 |
commit | f9a6294e0f527f008ce15192c40fc6206d038e30 (patch) | |
tree | e9d338ec68e0ddc75ec5a8d26a30daf1478fa9ee /arch/arm/boards/raspberry-pi/mbox-helpers.c | |
parent | da06dbb18d57b6f77beab5ea41423a639b4384f5 (diff) | |
download | barebox-f9a6294e0f527f008ce15192c40fc6206d038e30.tar.gz barebox-f9a6294e0f527f008ce15192c40fc6206d038e30.tar.xz |
ARM: rpi: split out mbox helpers to share code with PBL
We'll call some of these helpers from PBL in a later commit, so move
these into a common location.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220609055922.667016-6-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/boards/raspberry-pi/mbox-helpers.c')
-rw-r--r-- | arch/arm/boards/raspberry-pi/mbox-helpers.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/arm/boards/raspberry-pi/mbox-helpers.c b/arch/arm/boards/raspberry-pi/mbox-helpers.c new file mode 100644 index 0000000000..9f252c68ff --- /dev/null +++ b/arch/arm/boards/raspberry-pi/mbox-helpers.c @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +// SPDX-FileCopyrightText: 2009 Carlo Caione <carlo@carlocaione.org> + +#include <mach/mbox.h> +#include "lowlevel.h" + +struct msg_get_arm_mem { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_get_arm_mem get_arm_mem; + u32 end_tag; +}; + +struct msg_get_board_rev { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_get_board_rev get_board_rev; + u32 end_tag; +}; + +struct msg_get_mac_address { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_get_mac_address get_mac_address; + u32 end_tag; +}; + +ssize_t rpi_get_arm_mem(void) +{ + BCM2835_MBOX_STACK_ALIGN(struct msg_get_arm_mem, msg); + int ret; + + BCM2835_MBOX_INIT_HDR(msg); + BCM2835_MBOX_INIT_TAG(&msg->get_arm_mem, GET_ARM_MEMORY); + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); + if (ret) + return ret; + + return msg->get_arm_mem.body.resp.mem_size; +} + +int rpi_get_usbethaddr(u8 mac[6]) +{ + BCM2835_MBOX_STACK_ALIGN(struct msg_get_mac_address, msg); + int ret; + + BCM2835_MBOX_INIT_HDR(msg); + BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS); + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); + if (ret) { + pr_info("bcm2835: Could not query MAC address\n"); + return ret; + } + + memcpy(mac, msg->get_mac_address.body.resp.mac, 6); + return 0; +} + +int rpi_get_board_rev(void) +{ + int ret; + + BCM2835_MBOX_STACK_ALIGN(struct msg_get_board_rev, msg); + BCM2835_MBOX_INIT_HDR(msg); + BCM2835_MBOX_INIT_TAG(&msg->get_board_rev, GET_BOARD_REV); + + ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr); + if (ret) { + pr_err("Could not query board revision\n"); + return ret; + } + + return msg->get_board_rev.body.resp.rev; +} |