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Compatibility with older kernel versions #333

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Compatibility with older kernel versions #333

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50 changes: 43 additions & 7 deletions xpad.c
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Original file line number Diff line number Diff line change
Expand Up @@ -74,21 +74,57 @@
#include <linux/usb/quirks.h>
#include <linux/timer.h>

// backward compatibility. del_timer_sync is renamed to timer_delete_sync since 6.15.0
#if LINUX_VERSION_CODE < KERNEL_VERSION(6,15,0)
#define timer_delete_sync del_timer_sync
/* backwards compatibility. Pre-4.20 kernels: define timer_container_of manually */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,20,0)
#define timer_container_of(var, timer, field) \
container_of((timer), typeof(*(var)), field)
/* Pre-6.16 kernels (but ≥4.20): alias timer_container_of to from_timer */
#elif LINUX_VERSION_CODE < KERNEL_VERSION(6,16,0)
#define timer_container_of from_timer
#endif

// backward compatibility. from_timer is renamed to timer_container_of since 6.16.0
#if LINUX_VERSION_CODE < KERNEL_VERSION(6,16,0)
#define timer_container_of from_timer
/* backwards compatibility. from_timer() was added in 4.15 */
/* Note: from_timer() renamed to timer_container_of() in kernel 6.16 */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,15,0)
#define from_timer(var, timer, field) \
container_of((timer), typeof(*(var)), field)
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(6,16,0)
#define from_timer(var, timer, field) timer_container_of(var, timer, field)
#endif

/* backwards compatibility. del_timer_sync renamed to timer_delete_sync in 6.15 */
#if LINUX_VERSION_CODE < KERNEL_VERSION(6,15,0)
#define timer_delete_sync del_timer_sync
#endif

// enable compilation on pre 6.1 kernels
/* backwards compatibility. ABS_PROFILE fallback (older kernels) */
#ifndef ABS_PROFILE
#define ABS_PROFILE ABS_MISC
#endif

/* backwards compatibility. timer_setup fallback for pre-4.15 kernels */
#if LINUX_VERSION_CODE < KERNEL_VERSION(4,15,0)
#define timer_setup(timer, callback, flags) \
setup_timer((timer), (void (*)(unsigned long))(callback), (unsigned long)(timer))
#endif

/* backwards compatibility. ida_alloc / ida_free fallback (pre 5.18) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,18,0)
#define ida_alloc(ida, gfp) ida_simple_get(ida, 0, 0, gfp)
#define ida_free(ida, id) ida_simple_remove(ida, id)
#endif

/* backwards compatibility. usb_control_msg_recv fallback (pre 5.10) */
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,10,0)
static inline int usb_control_msg_recv(struct usb_device *dev, unsigned int pipe,
__u8 request, __u8 requesttype, __u16 value, __u16 index,
void *data, __u16 size, int timeout, gfp_t memflags)
{
return usb_control_msg(dev, pipe, request, requesttype, value, index,
data, size, timeout);
}
#endif

#define XPAD_PKT_LEN 64

/* The Guitar Hero Live (GHL) Xbox One dongles require a poke
Expand Down