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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | /* * Microsoft busmouse driver based on Logitech driver (see busmouse.c) * * Microsoft BusMouse support by Teemu Rantanen (tvr@cs.hut.fi) (02AUG92) * * Microsoft Bus Mouse support modified by Derrick Cole (cole@concert.net) * 8/28/92 * * Microsoft Bus Mouse support folded into 0.97pl4 code * by Peter Cervasio (pete%q106fm.uucp@wupost.wustl.edu) (08SEP92) * Changes: Logitech and Microsoft support in the same kernel. * Defined new constants in busmouse.h for MS mice. * Added int mse_busmouse_type to distinguish busmouse types * Added a couple of new functions to handle differences in using * MS vs. Logitech (where the int variable wasn't appropriate). * * Modified by Peter Cervasio (address above) (26SEP92) * Changes: Included code to (properly?) detect when a Microsoft mouse is * really attached to the machine. Don't know what this does to * Logitech bus mice, but all it does is read ports. * * Modified by Christoph Niemann (niemann@rubdv15.etdv.ruhr-uni-bochum.de) * Changes: Better interrupt-handler (like in busmouse.c). * Some changes to reduce code-size. * Changed detection code to use inb_p() instead of doing empty * loops to delay i/o. * * version 0.3a */ #include <linux/kernel.h> #include <linux/sched.h> #include <linux/busmouse.h> #include <linux/signal.h> #include <linux/errno.h> #include <asm/io.h> #include <asm/segment.h> #include <asm/system.h> #include <asm/irq.h> static struct mouse_status mouse; static void ms_mouse_interrupt(int irq, struct pt_regs * regs) { char dx, dy; unsigned char buttons; outb(MS_MSE_COMMAND_MODE, MS_MSE_CONTROL_PORT); outb((inb(MS_MSE_DATA_PORT) | 0x20), MS_MSE_DATA_PORT); outb(MS_MSE_READ_X, MS_MSE_CONTROL_PORT); dx = inb(MS_MSE_DATA_PORT); outb(MS_MSE_READ_Y, MS_MSE_CONTROL_PORT); dy = inb(MS_MSE_DATA_PORT); outb(MS_MSE_READ_BUTTONS, MS_MSE_CONTROL_PORT); buttons = ~(inb(MS_MSE_DATA_PORT)) & 0x07; outb(MS_MSE_COMMAND_MODE, MS_MSE_CONTROL_PORT); outb((inb(MS_MSE_DATA_PORT) & 0xdf), MS_MSE_DATA_PORT); if (dx != 0 || dy != 0 || buttons != mouse.buttons || ((~buttons) & 0x07)) { mouse.buttons = buttons; mouse.dx += dx; mouse.dy += dy; mouse.ready = 1; wake_up_interruptible(&mouse.wait); } } static void release_mouse(struct inode * inode, struct file * file) { MS_MSE_INT_OFF(); mouse.active = mouse.ready = 0; free_irq(MOUSE_IRQ); } static int open_mouse(struct inode * inode, struct file * file) { if (!mouse.present) return -EINVAL; if (mouse.active) return -EBUSY; mouse.active = 1; mouse.ready = mouse.dx = mouse.dy = 0; mouse.buttons = 0x80; if (request_irq(MOUSE_IRQ, ms_mouse_interrupt, 0, "MS Busmouse")) { mouse.active = 0; return -EBUSY; } outb(MS_MSE_START, MS_MSE_CONTROL_PORT); MS_MSE_INT_ON(); return 0; } static int write_mouse(struct inode * inode, struct file * file, const char * buffer, int count) { return -EINVAL; } static int read_mouse(struct inode * inode, struct file * file, char * buffer, int count) { int i, dx, dy; if (count < 3) return -EINVAL; if (!mouse.ready) return -EAGAIN; put_user(mouse.buttons | 0x80, buffer); dx = mouse.dx < -127 ? -127 : mouse.dx > 127 ? 127 : mouse.dx; dy = mouse.dy < -127 ? 127 : mouse.dy > 127 ? -127 : -mouse.dy; put_user((char)dx, buffer + 1); put_user((char)dy, buffer + 2); for (i = 3; i < count; i++) put_user(0x00, buffer + i); mouse.dx -= dx; mouse.dy += dy; mouse.ready = 0; return i; } static int mouse_select(struct inode *inode, struct file *file, int sel_type, select_table * wait) { if (sel_type != SEL_IN) return 0; if (mouse.ready) return 1; select_wait(&mouse.wait,wait); return 0; } struct file_operations ms_bus_mouse_fops = { NULL, /* mouse_seek */ read_mouse, write_mouse, NULL, /* mouse_readdir */ mouse_select, /* mouse_select */ NULL, /* mouse_ioctl */ NULL, /* mouse_mmap */ open_mouse, release_mouse, }; unsigned long ms_bus_mouse_init(unsigned long kmem_start) { int mse_byte, i; mouse.present = mouse.active = mouse.ready = 0; mouse.buttons = 0x80; mouse.dx = mouse.dy = 0; mouse.wait = NULL; if (inb_p(MS_MSE_SIGNATURE_PORT) == 0xde) { mse_byte = inb_p(MS_MSE_SIGNATURE_PORT); for (i = 0; i < 4; i++) { if (inb_p(MS_MSE_SIGNATURE_PORT) == 0xde) { if (inb_p(MS_MSE_SIGNATURE_PORT) == mse_byte) mouse.present = 1; else mouse.present = 0; } else mouse.present = 0; } } if (mouse.present == 0) { return kmem_start; } MS_MSE_INT_OFF(); printk("Microsoft BusMouse detected and installed.\n"); return kmem_start; } |