Author: andrew
Date: Tue Jul 28 11:13:37 2020
New Revision: 363645
URL: https://svnweb.freebsd.org/changeset/base/363645
Log:
Aadd Raspberry Pi firmware messages to manage GPIOs
Some GPIOs are managed by an external IO expaandder through the firmware.
Add the message details for these.
Sponsored by: Innovate UK
Modified:
head/sys/arm/broadcom/bcm2835/bcm2835_firmware.h
Modified: head/sys/arm/broadcom/bcm2835/bcm2835_firmware.h
==============================================================================
--- head/sys/arm/broadcom/bcm2835/bcm2835_firmware.h Tue Jul 28 10:58:37
2020 (r363644)
+++ head/sys/arm/broadcom/bcm2835/bcm2835_firmware.h Tue Jul 28 11:13:37
2020 (r363645)
@@ -142,6 +142,61 @@ union msg_set_turbo_body {
} resp;
};
+#define BCM2835_FIRMWARE_TAG_GET_GPIO_STATE 0x00030041
+#define BCM2835_FIRMWARE_TAG_SET_GPIO_STATE 0x00038041
+#define BCM2835_FIRMWARE_TAG_GET_GPIO_CONFIG 0x00030043
+#define BCM2835_FIRMWARE_TAG_SET_GPIO_CONFIG 0x00038043
+
+#define BCM2835_FIRMWARE_GPIO_IN 0
+#define BCM2835_FIRMWARE_GPIO_OUT 1
+
+union msg_get_gpio_state {
+ struct {
+ uint32_t gpio;
+ } req;
+ struct {
+ uint32_t gpio;
+ uint32_t state;
+ } resp;
+};
+
+union msg_set_gpio_state {
+ struct {
+ uint32_t gpio;
+ uint32_t state;
+ } req;
+ struct {
+ uint32_t gpio;
+ } resp;
+};
+
+union msg_get_gpio_config {
+ struct {
+ uint32_t gpio;
+ } req;
+ struct {
+ uint32_t gpio;
+ uint32_t dir;
+ uint32_t pol;
+ uint32_t term_en;
+ uint32_t term_pull_up;
+ } resp;
+};
+
+union msg_set_gpio_config {
+ struct {
+ uint32_t gpio;
+ uint32_t dir;
+ uint32_t pol;
+ uint32_t term_en;
+ uint32_t term_pull_up;
+ uint32_t state;
+ } req;
+ struct {
+ uint32_t gpio;
+ } resp;
+};
+
int bcm2835_firmware_property(device_t, uint32_t, void *, size_t);
#endif
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