diff options
Diffstat (limited to 'int15ps2.h')
| -rw-r--r-- | int15ps2.h | 13 |
1 files changed, 5 insertions, 8 deletions
@@ -63,6 +63,7 @@ enum ps2m_device_ids { PS2M_DEVICE_ID_IMEX_HORZ = 5 }; +/** Valid PS/2 mouse resolutions in DPI. */ enum ps2m_resolution { PS2M_RESOLUTION_25 = 0, PS2M_RESOLUTION_50 = 1, @@ -70,6 +71,7 @@ enum ps2m_resolution { PS2M_RESOLUTION_200 = 3 }; +/** Valid PS/2 mouse sampling rates in Hz. */ enum ps2m_sample_rate { PS2M_SAMPLE_RATE_10 = 0, PS2M_SAMPLE_RATE_20 = 1, @@ -197,6 +199,7 @@ static ps2m_err ps2m_enable(bool enable); __value [ah] \ __modify [ax] +/** Sends the magic sequence to switch the mouse to the IMPS2 protocol. */ static void ps2m_send_imps2_sequence(void) { ps2m_set_sample_rate(PS2M_SAMPLE_RATE_200); @@ -204,21 +207,15 @@ static void ps2m_send_imps2_sequence(void) ps2m_set_sample_rate(PS2M_SAMPLE_RATE_80); } +/** Detects whether we have a IMPS2 mouse with wheel support. */ static bool ps2m_detect_wheel(void) { int err; uint8_t device_id; - // Switch to the 4-byte packet and reset the mouse. - // We are not supposed to receive messages at this time anyway. - err = ps2m_init(PS2M_PACKET_SIZE_EXT); - if (err) { - return false; - } - // Get the initial mouse device id err = ps2m_get_device_id(&device_id); - if (err || device_id != 0) { + if (err || device_id != PS2M_DEVICE_ID_PLAIN) { // TODO : Likely have to accept more device_ids here. return false; } |