[PATCH 1/6] raspberry-pi: add board model detection
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Mon Jan 12 22:33:05 PST 2015
as the name is very long, return ps1 to the next line
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
arch/arm/boards/raspberry-pi/env/init/ps1 | 7 +++
arch/arm/boards/raspberry-pi/rpi.c | 83 ++++++++++++++++++++++++++++++-
arch/arm/mach-bcm2835/include/mach/mbox.h | 34 +++++++++++++
3 files changed, 123 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/boards/raspberry-pi/env/init/ps1
diff --git a/arch/arm/boards/raspberry-pi/env/init/ps1 b/arch/arm/boards/raspberry-pi/env/init/ps1
new file mode 100644
index 0000000..f894846
--- /dev/null
+++ b/arch/arm/boards/raspberry-pi/env/init/ps1
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if [ ${global.allow_color} = "true" ]; then
+ export PS1="\e[1;32mbarebox@\e[1;36m\h:\w\e[0m\n# "
+else
+ export PS1="barebox@\h:\w\n# "
+fi
diff --git a/arch/arm/boards/raspberry-pi/rpi.c b/arch/arm/boards/raspberry-pi/rpi.c
index 03a16d7..ae1e92a 100644
--- a/arch/arm/boards/raspberry-pi/rpi.c
+++ b/arch/arm/boards/raspberry-pi/rpi.c
@@ -20,6 +20,7 @@
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <envfs.h>
+#include <malloc.h>
#include <asm/armlinux.h>
#include <generated/mach-types.h>
@@ -38,6 +39,12 @@ struct msg_get_clock_rate {
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;
+};
+
static int rpi_get_arm_mem(u32 *size)
{
BCM2835_MBOX_STACK_ALIGN(struct msg_get_arm_mem, msg);
@@ -79,6 +86,80 @@ static int rpi_register_clkdev(u32 clock_id, const char *name)
return 0;
}
+
+#define RPI_MODEL(_id, _name, _init) \
+ [_id] = { \
+ .name = _name,\
+ .init = _init,\
+ }
+/* See comments in mbox.h for data source */
+static const struct {
+ const char *name;
+ bool has_onboard_eth;
+ void (*init)(void);
+} models[] = {
+ RPI_MODEL(0, "Unknown model", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_B_I2C0_2, "Model B (no P5)", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_B_I2C0_3, "Model B (no P5)", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_B_I2C1_4, "Model B", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_B_I2C1_5, "Model B", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_B_I2C1_6, "Model B", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_A_7, "Model A", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_A_8, "Model A", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_A_9, "Model A", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_B_REV2_d, "Model B rev2", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_B_REV2_e, "Model B rev2", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_B_REV2_f, "Model B rev2", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_B_PLUS, "Model B+", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_CM, "Compute Module", NULL),
+ RPI_MODEL(BCM2835_BOARD_REV_A_PLUS, "Model A+", NULL),
+};
+
+static int rpi_board_rev = 0;
+
+static void rpi_get_board_rev(void)
+{
+ int ret;
+ char *name;
+
+ 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) {
+ printf("bcm2835: Could not query board revision\n");
+ /* Ignore error; not critical */
+ return;
+ }
+
+ rpi_board_rev = msg->get_board_rev.body.resp.rev;
+ if (rpi_board_rev >= ARRAY_SIZE(models)) {
+ printf("RPI: Board rev %u outside known range\n",
+ rpi_board_rev);
+ goto unknown_rev;
+ }
+
+ if (!models[rpi_board_rev].name) {
+ printf("RPI: Board rev %u unknown\n", rpi_board_rev);
+ goto unknown_rev;
+ }
+
+ if (!rpi_board_rev)
+ goto unknown_rev;
+
+ name = asprintf("RaspberryPi %s (BCM2835/ARM1176JZF-S)",
+ models[rpi_board_rev].name);
+ barebox_set_model(name);
+ free(name);
+
+ return;
+
+unknown_rev:
+ rpi_board_rev = 0;
+ barebox_set_model("RaspberryPi (BCM2835/ARM1176JZF-S)");
+}
+
static int rpi_mem_init(void)
{
u32 size = 0;
@@ -96,7 +177,7 @@ mem_initcall(rpi_mem_init);
static int rpi_console_init(void)
{
- barebox_set_model("RaspberryPi (BCM2835/ARM1176JZF-S)");
+ rpi_get_board_rev();
barebox_set_hostname("rpi");
bcm2835_register_uart();
diff --git a/arch/arm/mach-bcm2835/include/mach/mbox.h b/arch/arm/mach-bcm2835/include/mach/mbox.h
index fb8a9bf..e5f6bfa 100644
--- a/arch/arm/mach-bcm2835/include/mach/mbox.h
+++ b/arch/arm/mach-bcm2835/include/mach/mbox.h
@@ -124,6 +124,40 @@ struct bcm2835_mbox_tag_hdr {
* };
*/
+#define BCM2835_MBOX_TAG_GET_BOARD_REV 0x00010002
+
+/*
+ * 0x2..0xf from:
+ * http://raspberryalphaomega.org.uk/2013/02/06/automatic-raspberry-pi-board-revision-detection-model-a-b1-and-b2/
+ * http://www.raspberrypi.org/forums/viewtopic.php?f=63&t=32733
+ * 0x10, 0x11 from swarren's testing
+ */
+#define BCM2835_BOARD_REV_B_I2C0_2 0x2
+#define BCM2835_BOARD_REV_B_I2C0_3 0x3
+#define BCM2835_BOARD_REV_B_I2C1_4 0x4
+#define BCM2835_BOARD_REV_B_I2C1_5 0x5
+#define BCM2835_BOARD_REV_B_I2C1_6 0x6
+#define BCM2835_BOARD_REV_A_7 0x7
+#define BCM2835_BOARD_REV_A_8 0x8
+#define BCM2835_BOARD_REV_A_9 0x9
+#define BCM2835_BOARD_REV_B_REV2_d 0xd
+#define BCM2835_BOARD_REV_B_REV2_e 0xe
+#define BCM2835_BOARD_REV_B_REV2_f 0xf
+#define BCM2835_BOARD_REV_B_PLUS 0x10
+#define BCM2835_BOARD_REV_CM 0x11
+#define BCM2835_BOARD_REV_A_PLUS 0x12
+
+struct bcm2835_mbox_tag_get_board_rev {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ } req;
+ struct {
+ u32 rev;
+ } resp;
+ } body;
+};
+
#define BCM2835_MBOX_TAG_GET_ARM_MEMORY 0x00010005
struct bcm2835_mbox_tag_get_arm_mem {
--
2.1.3
More information about the barebox
mailing list