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usb: expose the context of the interrupted function on USB interrupt

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redoste 2023-05-27 18:52:05 +02:00
parent 76c82beec6
commit 21ff5c1d53
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2 changed files with 17 additions and 3 deletions
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8
include/gint/usb.h
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@ -517,6 +517,14 @@ uint16_t usb_dc_string(uint16_t const *literal, size_t len);
This is mostly used by the driver to answer GET_DESCRIPTOR requests. */
usb_dc_string_t *usb_dc_string_get(uint16_t id);
//---
// USB interrupts
//---
/* usb_interrupt_context: Context of the function interrupted by a USB interrupt
The pointer is set back to NULL when the interrupt is finished being handled. */
extern gint_inth_callback_context_t* usb_interrupt_context;
#ifdef __cplusplus
}
#endif

12
src/usb/usb.c
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@ -12,7 +12,7 @@
#define USB SH7305_USB
static void usb_interrupt_handler(void);
static void usb_interrupt_handler(gint_inth_callback_context_t* interrupt_context);
/* Shorthand to clear a bit in INTSTS0 */
#define INTSTS0_clear(field_name) { \
@ -213,7 +213,7 @@ int usb_open(usb_interface_t const **interfaces, gint_call_t callback)
USB.NRDYSTS = 0x0000;
USB.BEMPSTS = 0x0000;
intc_handler_function(0xa20, GINT_CALL(usb_interrupt_handler));
intc_handler_function(0xa20, GINT_CALL_FLAG(usb_interrupt_handler));
intc_priority(INTC_USB, 8);
/* Pull D+ up to 3.3V, notifying connection when possible. Read
@ -251,8 +251,12 @@ void usb_close(void)
// Userspace interrupt handler
//---
static void usb_interrupt_handler(void)
gint_inth_callback_context_t* usb_interrupt_context;
static void usb_interrupt_handler(gint_inth_callback_context_t* interrupt_context)
{
usb_interrupt_context = interrupt_context;
GUNUSED static char const * const device_st[] = {
"powered", "default", "address", "configured",
"suspended-powered", "suspended-default", "suspended-address",
@ -315,6 +319,8 @@ static void usb_interrupt_handler(void)
/* Restore PIPESEL which can have been used for transfers */
USB.PIPESEL.word = pipesel;
usb_interrupt_context = NULL;
}
//---