drivers/input/mouse/synaptics.c

Source file repositories/reference/linux-study-clean/drivers/input/mouse/synaptics.c

File Facts

System
Linux kernel
Corpus path
drivers/input/mouse/synaptics.c
Extension
.c
Size
51814 bytes
Lines
1945
Domain
Driver Families
Bucket
drivers/input
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct min_max_quirk {
	const char * const *pnp_ids;
	struct {
		u32 min, max;
	} board_id;
	u32 x_min, x_max, y_min, y_max;
};

static const struct min_max_quirk min_max_pnpid_table[] = {
	{
		(const char * const []){"LEN0033", NULL},
		{ANY_BOARD_ID, ANY_BOARD_ID},
		1024, 5052, 2258, 4832
	},
	{
		(const char * const []){"LEN0042", NULL},
		{ANY_BOARD_ID, ANY_BOARD_ID},
		1232, 5710, 1156, 4696
	},
	{
		(const char * const []){"LEN0034", "LEN0036", "LEN0037",
					"LEN0039", "LEN2002", "LEN2004",
					NULL},
		{ANY_BOARD_ID, 2961},
		1024, 5112, 2024, 4832
	},
	{
		(const char * const []){"LEN2000", NULL},
		{ANY_BOARD_ID, ANY_BOARD_ID},
		1024, 5113, 2021, 4832
	},
	{
		(const char * const []){"LEN2001", NULL},
		{ANY_BOARD_ID, ANY_BOARD_ID},
		1024, 5022, 2508, 4832
	},
	{
		(const char * const []){"LEN2006", NULL},
		{2691, 2691},
		1024, 5045, 2457, 4832
	},
	{
		(const char * const []){"LEN2006", NULL},
		{ANY_BOARD_ID, ANY_BOARD_ID},
		1264, 5675, 1171, 4688
	},
	{ }
};

/*****************************************************************************
 *	Synaptics communications functions
 ****************************************************************************/

/*
 * Synaptics touchpads report the y coordinate from bottom to top, which is
 * opposite from what userspace expects.
 * This function is used to invert y before reporting.
 */
static int synaptics_invert_y(int y)
{
	return YMAX_NOMINAL + YMIN_NOMINAL - y;
}

/*
 * Apply quirk(s) if the hardware matches
 */
static void synaptics_apply_quirks(struct psmouse *psmouse,
				   struct synaptics_device_info *info)
{
	int i;

	for (i = 0; min_max_pnpid_table[i].pnp_ids; i++) {
		if (!psmouse_matches_pnp_id(psmouse,
					    min_max_pnpid_table[i].pnp_ids))
			continue;

		if (min_max_pnpid_table[i].board_id.min != ANY_BOARD_ID &&
		    info->board_id < min_max_pnpid_table[i].board_id.min)
			continue;

		if (min_max_pnpid_table[i].board_id.max != ANY_BOARD_ID &&
		    info->board_id > min_max_pnpid_table[i].board_id.max)
			continue;

		info->x_min = min_max_pnpid_table[i].x_min;
		info->x_max = min_max_pnpid_table[i].x_max;
		info->y_min = min_max_pnpid_table[i].y_min;
		info->y_max = min_max_pnpid_table[i].y_max;
		psmouse_info(psmouse,
			     "quirked min/max coordinates: x [%d..%d], y [%d..%d]\n",

Annotation

Implementation Notes