diff options
Diffstat (limited to 'ps2.h')
| -rw-r--r-- | ps2.h | 160 |
1 files changed, 111 insertions, 49 deletions
@@ -28,7 +28,19 @@ /** The corresponding interrupt vector for IRQ 12. */ #define PS2_MOUSE_INT_VECTOR 0x74 -enum { +/** Packet size for plain PS/2 in default protocol. */ +#define PS2_MOUSE_PLAIN_PACKET_SIZE 3 + +typedef uint8_t ps2m_err; +enum ps2m_errors { + PS2M_ERR_INVALID_FUNCTION = 1, + PSM2_ERR_INVALID_INPUT = 2, + PSM2_ERR_INTERFACE_ERROR = 3, + PSM2_ERR_RESEND = 4, + PSM2_ERR_NO_CALLBACK = 5, +}; + +enum ps2m_status { PS2M_STATUS_BUTTON_1 = 1 << 0, PS2M_STATUS_BUTTON_2 = 1 << 1, PS2M_STATUS_BUTTON_3 = 1 << 2, @@ -38,8 +50,19 @@ enum { PS2M_STATUS_Y_OVF = 1 << 7, }; +enum ps2m_device_ids { + /** Standard PS/2 mouse, 2 buttons. */ + PS2M_DEVICE_ID_PLAIN = 0, + /** IntelliMouse PS/2, with wheel. */ + PS2M_DEVICE_ID_IMPS2 = 3, + /** IntelliMouse Explorer, wheel and 5 buttons. */ + PS2M_DEVICE_ID_IMEX = 4, + /** IntelliMouse Explorer, wheel, 5 buttons, and horizontal scrolling. */ + PS2M_DEVICE_ID_IMEX_HORZ = 5 +}; + #pragma aux PS2_CB far loadds parm reverse caller [] -// TODO: ax and es look not be preserved with this. VBox BIOS already preserves them though. +// TODO: ax and es look not be preserved with this. VBox BIOS already preserves them though, as well as 32-bit registers /** Invoked by the BIOS when there is a mouse event. * @param status combination of PS2M_STATUS_* flags */ @@ -51,76 +74,115 @@ static inline void cli(void); static inline void sti(void); #pragma aux sti = "sti" -static uint8_t ps2_init(void); -#pragma aux ps2_init = \ - "stc" /* If nothing happens, assume failure */ \ - "mov ax, 0xC205" /* Pointing device: initialization */ \ - "mov bh, 3" /* Use 3 byte packets */ \ +static ps2m_err ps2m_init(uint8_t packet_size); +#pragma aux ps2m_init = \ + "stc" /* If nothing happens, assume failure */ \ + "mov ax, 0xC205" /* Pointing device: initialization (packet size in bh) */ \ "int 0x15" \ - "jc fail" \ - \ - "mov ax, 0xC201" /* Pointing device: reset */ \ + "jnc end" /* Success */ \ + "fail: test ah, ah" /* Ensure we have some error code back, set ah to -1 if we don't */ \ + "jnz end" \ + "dec ah" \ + "end:" \ + __parm [bh] \ + __value [ah] \ + __modify [ax] + +static ps2m_err ps2m_reset(void); +#pragma aux ps2m_reset = \ + "stc" \ + "mov ax, 0xC201" /* Pointing device: reset */ \ "int 0x15" \ - "jc fail" \ - \ - "mov ax, 0xC203" /* Pointing device: set resolution */ \ - "mov bh, 3" /* 3 count per mm = ~ 200 ppi */ \ + "jnc end" \ + "fail: test ah, ah" \ + "jnz end" \ + "dec ah" \ + "end:" \ + __value [ah] \ + __modify [ax] + +static ps2m_err ps2m_get_device_id(uint8_t *device_id); +#pragma aux ps2m_get_device_id = \ + "stc" \ + "mov ax, 0xC201" /* Pointing device: reset */ \ "int 0x15" \ - "jc fail" \ - \ - "mov ax, 0xC202" /* Pointing device: set sample rate*/ \ - "mov bh, 5" /* 2: 40 samples per second */ \ + "mov es:[di], bh" /* Save returned value */ \ + "jnc end" \ + "fail: test ah, ah" \ + "jnz end" \ + "dec ah" \ + "end:" \ + __parm [es di] \ + __value [ah] \ + __modify [ax] + +static ps2m_err ps2m_set_resolution(uint8_t resolution); +#pragma aux ps2m_set_resolution = \ + "stc" \ + "mov ax, 0xC203" /* Pointing device: set resolution (in bh) */ \ "int 0x15" \ - "jc fail" \ - \ - "mov ax, 0xC206" /* Pointing device: extended commands */ \ - "mov bh, 1" /* Set 1:1 scaling */ \ + "jnc end" \ + "fail: test ah, ah" \ + "jnz end" \ + "dec ah" \ + "end:" \ + __parm [bh] \ + __value [ah] \ + __modify [ax] + +static ps2m_err ps2m_set_sample_rate(uint8_t sample_rate); +#pragma aux ps2m_set_sample_rate = \ + "stc" \ + "mov ax, 0xC202" /* Pointing device: set sample rate (in bh) */ \ "int 0x15" \ - "jc fail" \ - \ - "mov ah, 0" /* Success */ \ - "jmp end" \ - \ - "fail: test ah, ah" /* Ensure we have some error code back, set ah to ff if we don't */ \ + "jnc end" \ + "fail: test ah, ah" \ "jnz end" \ - "mov ah, 0xFF" \ + "dec ah" \ "end:" \ + __parm [bh] \ + __value [ah] \ + __modify [ax] + +static ps2m_err ps2m_set_scaling_factor(uint8_t scaling_factor); +#pragma aux ps2m_set_scaling_factor = \ + "stc" \ + "mov ax, 0xC206" /* Pointing device: extended commands (with bh > 0, set scaling factor) */ \ + "int 0x15" \ + "jnc end" \ + "fail: test ah, ah" \ + "jnz end" \ + "dec ah" \ + "end:" \ + __parm [bh] \ __value [ah] \ __modify [ax] -static uint8_t ps2_set_callback(LPFN_PS2CALLBACK callback); -#pragma aux ps2_set_callback = \ - "stc" /* If nothing happens, assume failure */ \ +static ps2m_err ps2m_set_callback(LPFN_PS2CALLBACK callback); +#pragma aux ps2m_set_callback = \ + "stc" \ "mov ax, 0xC207" /* Pointing device: set interrupt callback (in es:bx) */ \ "int 0x15" \ - "jc fail" \ - \ - "mov ah, 0" /* Success */ \ - "jmp end" \ - \ - "fail: test ah, ah" /* Ensure we have some error code back */ \ + "jnc end" \ + "fail: test ah, ah" \ "jnz end" \ - "mov ah, 0xFF" \ + "dec ah" \ "end:" \ __parm [es bx] \ __value [ah] \ __modify [ax] -static uint8_t ps2_enable(bool enable); -#pragma aux ps2_enable = \ +static ps2m_err ps2m_enable(bool enable); +#pragma aux ps2m_enable = \ "test bh, bh" /* Ensure enable is either 1 or 0 */ \ "setnz bh" \ - "stc" /* If nothing happens, assume failure */ \ + "stc" \ "mov ax, 0xC200" /* Pointing device enable/disable (in bh) */ \ "int 0x15" \ - "jc fail" \ - \ - "mov ah, 0" /* Success */ \ - "jmp end" \ - \ - "fail: test ah, ah" /* Ensure we have some error code back */ \ + "jnc end" \ + "fail: test ah, ah" \ "jnz end" \ - "mov ah, 0xFF" \ + "dec ah" \ "end:" \ __parm [bh] \ __value [ah] \ |