| /* |
| * PS/2 mouse driver |
| * |
| * Copyright (c) 1999-2002 Vojtech Pavlik |
| * Copyright (c) 2003-2004 Dmitry Torokhov |
| */ |
| |
| /* |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 as published by |
| * the Free Software Foundation. |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/input.h> |
| #include <linux/serio.h> |
| #include <linux/init.h> |
| #include <linux/libps2.h> |
| #include <linux/mutex.h> |
| |
| #include "psmouse.h" |
| #include "synaptics.h" |
| #include "logips2pp.h" |
| #include "alps.h" |
| #include "hgpk.h" |
| #include "lifebook.h" |
| #include "trackpoint.h" |
| #include "touchkit_ps2.h" |
| #include "elantech.h" |
| #include "sentelic.h" |
| |
| #define DRIVER_DESC "PS/2 mouse driver" |
| |
| MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>"); |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_LICENSE("GPL"); |
| |
| static unsigned int psmouse_max_proto = PSMOUSE_AUTO; |
| static int psmouse_set_maxproto(const char *val, struct kernel_param *kp); |
| static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp); |
| #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) |
| #define param_set_proto_abbrev psmouse_set_maxproto |
| #define param_get_proto_abbrev psmouse_get_maxproto |
| module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644); |
| MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches."); |
| |
| static unsigned int psmouse_resolution = 200; |
| module_param_named(resolution, psmouse_resolution, uint, 0644); |
| MODULE_PARM_DESC(resolution, "Resolution, in dpi."); |
| |
| static unsigned int psmouse_rate = 100; |
| module_param_named(rate, psmouse_rate, uint, 0644); |
| MODULE_PARM_DESC(rate, "Report rate, in reports per second."); |
| |
| static unsigned int psmouse_smartscroll = 1; |
| module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); |
| MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); |
| |
| static unsigned int psmouse_resetafter = 5; |
| module_param_named(resetafter, psmouse_resetafter, uint, 0644); |
| MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never)."); |
| |
| static unsigned int psmouse_resync_time; |
| module_param_named(resync_time, psmouse_resync_time, uint, 0644); |
| MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never)."); |
| |
| PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO, |
| NULL, |
| psmouse_attr_show_protocol, psmouse_attr_set_protocol); |
| PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO, |
| (void *) offsetof(struct psmouse, rate), |
| psmouse_show_int_attr, psmouse_attr_set_rate); |
| PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO, |
| (void *) offsetof(struct psmouse, resolution), |
| psmouse_show_int_attr, psmouse_attr_set_resolution); |
| PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO, |
| (void *) offsetof(struct psmouse, resetafter), |
| psmouse_show_int_attr, psmouse_set_int_attr); |
| PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO, |
| (void *) offsetof(struct psmouse, resync_time), |
| psmouse_show_int_attr, psmouse_set_int_attr); |
| |
| static struct attribute *psmouse_attributes[] = { |
| &psmouse_attr_protocol.dattr.attr, |
| &psmouse_attr_rate.dattr.attr, |
| &psmouse_attr_resolution.dattr.attr, |
| &psmouse_attr_resetafter.dattr.attr, |
| &psmouse_attr_resync_time.dattr.attr, |
| NULL |
| }; |
| |
| static struct attribute_group psmouse_attribute_group = { |
| .attrs = psmouse_attributes, |
| }; |
| |
| /* |
| * psmouse_mutex protects all operations changing state of mouse |
| * (connecting, disconnecting, changing rate or resolution via |
| * sysfs). We could use a per-device semaphore but since there |
| * rarely more than one PS/2 mouse connected and since semaphore |
| * is taken in "slow" paths it is not worth it. |
| */ |
| static DEFINE_MUTEX(psmouse_mutex); |
| |
| static struct workqueue_struct *kpsmoused_wq; |
| |
| struct psmouse_protocol { |
| enum psmouse_type type; |
| bool maxproto; |
| const char *name; |
| const char *alias; |
| int (*detect)(struct psmouse *, bool); |
| int (*init)(struct psmouse *); |
| }; |
| |
| /* |
| * psmouse_process_byte() analyzes the PS/2 data stream and reports |
| * relevant events to the input module once full packet has arrived. |
| */ |
| |
| static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) |
| { |
| struct input_dev *dev = psmouse->dev; |
| unsigned char *packet = psmouse->packet; |
| |
| if (psmouse->pktcnt < psmouse->pktsize) |
| return PSMOUSE_GOOD_DATA; |
| |
| /* |
| * Full packet accumulated, process it |
| */ |
| |
| /* |
| * Scroll wheel on IntelliMice, scroll buttons on NetMice |
| */ |
| |
| if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS) |
| input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]); |
| |
| /* |
| * Scroll wheel and buttons on IntelliMouse Explorer |
| */ |
| |
| if (psmouse->type == PSMOUSE_IMEX) { |
| switch (packet[3] & 0xC0) { |
| case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ |
| input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); |
| break; |
| case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ |
| input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31)); |
| break; |
| case 0x00: |
| case 0xC0: |
| input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7)); |
| input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1); |
| input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1); |
| break; |
| } |
| } |
| |
| /* |
| * Extra buttons on Genius NewNet 3D |
| */ |
| |
| if (psmouse->type == PSMOUSE_GENPS) { |
| input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1); |
| input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1); |
| } |
| |
| /* |
| * Extra button on ThinkingMouse |
| */ |
| if (psmouse->type == PSMOUSE_THINKPS) { |
| input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1); |
| /* Without this bit of weirdness moving up gives wildly high Y changes. */ |
| packet[1] |= (packet[0] & 0x40) << 1; |
| } |
| |
| /* |
| * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first |
| * byte. |
| */ |
| if (psmouse->type == PSMOUSE_CORTRON) { |
| input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1); |
| packet[0] |= 0x08; |
| } |
| |
| /* |
| * Generic PS/2 Mouse |
| */ |
| |
| input_report_key(dev, BTN_LEFT, packet[0] & 1); |
| input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1); |
| input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1); |
| |
| input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0); |
| input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0); |
| |
| input_sync(dev); |
| |
| return PSMOUSE_FULL_PACKET; |
| } |
| |
| void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work, |
| unsigned long delay) |
| { |
| queue_delayed_work(kpsmoused_wq, work, delay); |
| } |
| |
| /* |
| * __psmouse_set_state() sets new psmouse state and resets all flags. |
| */ |
| |
| static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) |
| { |
| psmouse->state = new_state; |
| psmouse->pktcnt = psmouse->out_of_sync_cnt = 0; |
| psmouse->ps2dev.flags = 0; |
| psmouse->last = jiffies; |
| } |
| |
| |
| /* |
| * psmouse_set_state() sets new psmouse state and resets all flags and |
| * counters while holding serio lock so fighting with interrupt handler |
| * is not a concern. |
| */ |
| |
| void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state) |
| { |
| serio_pause_rx(psmouse->ps2dev.serio); |
| __psmouse_set_state(psmouse, new_state); |
| serio_continue_rx(psmouse->ps2dev.serio); |
| } |
| |
| /* |
| * psmouse_handle_byte() processes one byte of the input data stream |
| * by calling corresponding protocol handler. |
| */ |
| |
| static int psmouse_handle_byte(struct psmouse *psmouse) |
| { |
| psmouse_ret_t rc = psmouse->protocol_handler(psmouse); |
| |
| switch (rc) { |
| case PSMOUSE_BAD_DATA: |
| if (psmouse->state == PSMOUSE_ACTIVATED) { |
| printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n", |
| psmouse->name, psmouse->phys, psmouse->pktcnt); |
| if (++psmouse->out_of_sync_cnt == psmouse->resetafter) { |
| __psmouse_set_state(psmouse, PSMOUSE_IGNORE); |
| printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n"); |
| serio_reconnect(psmouse->ps2dev.serio); |
| return -1; |
| } |
| } |
| psmouse->pktcnt = 0; |
| break; |
| |
| case PSMOUSE_FULL_PACKET: |
| psmouse->pktcnt = 0; |
| if (psmouse->out_of_sync_cnt) { |
| psmouse->out_of_sync_cnt = 0; |
| printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n", |
| psmouse->name, psmouse->phys); |
| } |
| break; |
| |
| case PSMOUSE_GOOD_DATA: |
| break; |
| } |
| return 0; |
| } |
| |
| /* |
| * psmouse_interrupt() handles incoming characters, either passing them |
| * for normal processing or gathering them as command response. |
| */ |
| |
| static irqreturn_t psmouse_interrupt(struct serio *serio, |
| unsigned char data, unsigned int flags) |
| { |
| struct psmouse *psmouse = serio_get_drvdata(serio); |
| |
| if (psmouse->state == PSMOUSE_IGNORE) |
| goto out; |
| |
| if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) { |
| if (psmouse->state == PSMOUSE_ACTIVATED) |
| printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n", |
| flags & SERIO_TIMEOUT ? " timeout" : "", |
| flags & SERIO_PARITY ? " bad parity" : ""); |
| ps2_cmd_aborted(&psmouse->ps2dev); |
| goto out; |
| } |
| |
| if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK)) |
| if (ps2_handle_ack(&psmouse->ps2dev, data)) |
| goto out; |
| |
| if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD)) |
| if (ps2_handle_response(&psmouse->ps2dev, data)) |
| goto out; |
| |
| if (psmouse->state <= PSMOUSE_RESYNCING) |
| goto out; |
| |
| if (psmouse->state == PSMOUSE_ACTIVATED && |
| psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { |
| printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n", |
| psmouse->name, psmouse->phys, psmouse->pktcnt); |
| psmouse->badbyte = psmouse->packet[0]; |
| __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); |
| psmouse_queue_work(psmouse, &psmouse->resync_work, 0); |
| goto out; |
| } |
| |
| psmouse->packet[psmouse->pktcnt++] = data; |
| /* |
| * Check if this is a new device announcement (0xAA 0x00) |
| */ |
| if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) { |
| if (psmouse->pktcnt == 1) { |
| psmouse->last = jiffies; |
| goto out; |
| } |
| |
| if (psmouse->packet[1] == PSMOUSE_RET_ID || |
| (psmouse->type == PSMOUSE_HGPK && |
| psmouse->packet[1] == PSMOUSE_RET_BAT)) { |
| __psmouse_set_state(psmouse, PSMOUSE_IGNORE); |
| serio_reconnect(serio); |
| goto out; |
| } |
| /* |
| * Not a new device, try processing first byte normally |
| */ |
| psmouse->pktcnt = 1; |
| if (psmouse_handle_byte(psmouse)) |
| goto out; |
| |
| psmouse->packet[psmouse->pktcnt++] = data; |
| } |
| |
| /* |
| * See if we need to force resync because mouse was idle for too long |
| */ |
| if (psmouse->state == PSMOUSE_ACTIVATED && |
| psmouse->pktcnt == 1 && psmouse->resync_time && |
| time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) { |
| psmouse->badbyte = psmouse->packet[0]; |
| __psmouse_set_state(psmouse, PSMOUSE_RESYNCING); |
| psmouse_queue_work(psmouse, &psmouse->resync_work, 0); |
| goto out; |
| } |
| |
| psmouse->last = jiffies; |
| psmouse_handle_byte(psmouse); |
| |
| out: |
| return IRQ_HANDLED; |
| } |
| |
| |
| /* |
| * psmouse_sliced_command() sends an extended PS/2 command to the mouse |
| * using sliced syntax, understood by advanced devices, such as Logitech |
| * or Synaptics touchpads. The command is encoded as: |
| * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu |
| * is the command. |
| */ |
| int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command) |
| { |
| int i; |
| |
| if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11)) |
| return -1; |
| |
| for (i = 6; i >= 0; i -= 2) { |
| unsigned char d = (command >> i) & 3; |
| if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES)) |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| |
| /* |
| * psmouse_reset() resets the mouse into power-on state. |
| */ |
| int psmouse_reset(struct psmouse *psmouse) |
| { |
| unsigned char param[2]; |
| |
| if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT)) |
| return -1; |
| |
| if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) |
| return -1; |
| |
| return 0; |
| } |
| |
| |
| /* |
| * Genius NetMouse magic init. |
| */ |
| static int genius_detect(struct psmouse *psmouse, bool set_properties) |
| { |
| struct ps2dev *ps2dev = &psmouse->ps2dev; |
| unsigned char param[4]; |
| |
| param[0] = 3; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); |
| ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); |
| ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); |
| ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); |
| ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO); |
| |
| if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55) |
| return -1; |
| |
| if (set_properties) { |
| __set_bit(BTN_EXTRA, psmouse->dev->keybit); |
| __set_bit(BTN_SIDE, psmouse->dev->keybit); |
| __set_bit(REL_WHEEL, psmouse->dev->relbit); |
| |
| psmouse->vendor = "Genius"; |
| psmouse->name = "Mouse"; |
| psmouse->pktsize = 4; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * IntelliMouse magic init. |
| */ |
| static int intellimouse_detect(struct psmouse *psmouse, bool set_properties) |
| { |
| struct ps2dev *ps2dev = &psmouse->ps2dev; |
| unsigned char param[2]; |
| |
| param[0] = 200; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| param[0] = 100; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| param[0] = 80; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); |
| |
| if (param[0] != 3) |
| return -1; |
| |
| if (set_properties) { |
| __set_bit(BTN_MIDDLE, psmouse->dev->keybit); |
| __set_bit(REL_WHEEL, psmouse->dev->relbit); |
| |
| if (!psmouse->vendor) psmouse->vendor = "Generic"; |
| if (!psmouse->name) psmouse->name = "Wheel Mouse"; |
| psmouse->pktsize = 4; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Try IntelliMouse/Explorer magic init. |
| */ |
| static int im_explorer_detect(struct psmouse *psmouse, bool set_properties) |
| { |
| struct ps2dev *ps2dev = &psmouse->ps2dev; |
| unsigned char param[2]; |
| |
| intellimouse_detect(psmouse, 0); |
| |
| param[0] = 200; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| param[0] = 200; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| param[0] = 80; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); |
| |
| if (param[0] != 4) |
| return -1; |
| |
| /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */ |
| param[0] = 200; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| param[0] = 80; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| param[0] = 40; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| |
| if (set_properties) { |
| __set_bit(BTN_MIDDLE, psmouse->dev->keybit); |
| __set_bit(REL_WHEEL, psmouse->dev->relbit); |
| __set_bit(REL_HWHEEL, psmouse->dev->relbit); |
| __set_bit(BTN_SIDE, psmouse->dev->keybit); |
| __set_bit(BTN_EXTRA, psmouse->dev->keybit); |
| |
| if (!psmouse->vendor) psmouse->vendor = "Generic"; |
| if (!psmouse->name) psmouse->name = "Explorer Mouse"; |
| psmouse->pktsize = 4; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Kensington ThinkingMouse / ExpertMouse magic init. |
| */ |
| static int thinking_detect(struct psmouse *psmouse, bool set_properties) |
| { |
| struct ps2dev *ps2dev = &psmouse->ps2dev; |
| unsigned char param[2]; |
| static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 }; |
| int i; |
| |
| param[0] = 10; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| param[0] = 0; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES); |
| for (i = 0; i < ARRAY_SIZE(seq); i++) { |
| param[0] = seq[i]; |
| ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE); |
| } |
| ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); |
| |
| if (param[0] != 2) |
| return -1; |
| |
| if (set_properties) { |
| __set_bit(BTN_EXTRA, psmouse->dev->keybit); |
| |
| psmouse->vendor = "Kensington"; |
| psmouse->name = "ThinkingMouse"; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Bare PS/2 protocol "detection". Always succeeds. |
| */ |
| static int ps2bare_detect(struct psmouse *psmouse, bool set_properties) |
| { |
| if (set_properties) { |
| if (!psmouse->vendor) psmouse->vendor = "Generic"; |
| if (!psmouse->name) psmouse->name = "Mouse"; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Cortron PS/2 protocol detection. There's no special way to detect it, so it |
| * must be forced by sysfs protocol writing. |
| */ |
| static int cortron_detect(struct psmouse *psmouse, bool set_properties) |
| { |
| if (set_properties) { |
| psmouse->vendor = "Cortron"; |
| psmouse->name = "PS/2 Trackball"; |
| __set_bit(BTN_SIDE, psmouse->dev->keybit); |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * psmouse_extensions() probes for any extensions to the basic PS/2 protocol |
| * the mouse may have. |
| */ |
| |
| static int psmouse_extensions(struct psmouse *psmouse, |
| unsigned int max_proto, bool set_properties) |
| { |
| bool synaptics_hardware = true; |
| |
| /* |
| * We always check for lifebook because it does not disturb mouse |
| * (it only checks DMI information). |
| */ |
| if (lifebook_detect(psmouse, set_properties) == 0) { |
| if (max_proto > PSMOUSE_IMEX) { |
| if (!set_properties || lifebook_init(psmouse) == 0) |
| return PSMOUSE_LIFEBOOK; |
| } |
| } |
| |
| /* |
| * Try Kensington ThinkingMouse (we try first, because synaptics probe |
| * upsets the thinkingmouse). |
| */ |
| |
| if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0) |
| return PSMOUSE_THINKPS; |
| |
| /* |
| * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol |
| * support is disabled in config - we need to know if it is synaptics so we |
| * can reset it properly after probing for intellimouse. |
| */ |
| if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) { |
| synaptics_hardware = true; |
| |
| if (max_proto > PSMOUSE_IMEX) { |
| if (!set_properties || synaptics_init(psmouse) == 0) |
| return PSMOUSE_SYNAPTICS; |
| /* |
| * Some Synaptics touchpads can emulate extended protocols (like IMPS/2). |
| * Unfortunately Logitech/Genius probes confuse some firmware versions so |
| * we'll have to skip them. |
| */ |
| max_proto = PSMOUSE_IMEX; |
| } |
| /* |
| * Make sure that touchpad is in relative mode, gestures (taps) are enabled |
| */ |
| synaptics_reset(psmouse); |
| } |
| |
| /* |
| * Try ALPS TouchPad |
| */ |
| if (max_proto > PSMOUSE_IMEX) { |
| ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); |
| if (alps_detect(psmouse, set_properties) == 0) { |
| if (!set_properties || alps_init(psmouse) == 0) |
| return PSMOUSE_ALPS; |
| /* |
| * Init failed, try basic relative protocols |
| */ |
| max_proto = PSMOUSE_IMEX; |
| } |
| } |
| |
| /* |
| * Try OLPC HGPK touchpad. |
| */ |
| if (max_proto > PSMOUSE_IMEX && |
| hgpk_detect(psmouse, set_properties) == 0) { |
| if (!set_properties || hgpk_init(psmouse) == 0) |
| return PSMOUSE_HGPK; |
| /* |
| * Init failed, try basic relative protocols |
| */ |
| max_proto = PSMOUSE_IMEX; |
| } |
| |
| /* |
| * Try Elantech touchpad. |
| */ |
| if (max_proto > PSMOUSE_IMEX && |
| elantech_detect(psmouse, set_properties) == 0) { |
| if (!set_properties || elantech_init(psmouse) == 0) |
| return PSMOUSE_ELANTECH; |
| /* |
| * Init failed, try basic relative protocols |
| */ |
| max_proto = PSMOUSE_IMEX; |
| } |
| |
| /* |
| * Try Finger Sensing Pad |
| */ |
| if (max_proto > PSMOUSE_IMEX) { |
| if (fsp_detect(psmouse, set_properties) == 0) { |
| if (!set_properties || fsp_init(psmouse) == 0) |
| return PSMOUSE_FSP; |
| /* |
| * Init failed, try basic relative protocols |
| */ |
| max_proto = PSMOUSE_IMEX; |
| } |
| } |
| |
| if (max_proto > PSMOUSE_IMEX) { |
| if (genius_detect(psmouse, set_properties) == 0) |
| return PSMOUSE_GENPS; |
| |
| if (ps2pp_init(psmouse, set_properties) == 0) |
| return PSMOUSE_PS2PP; |
| |
| if (trackpoint_detect(psmouse, set_properties) == 0) |
| return PSMOUSE_TRACKPOINT; |
| |
| if (touchkit_ps2_detect(psmouse, set_properties) == 0) |
| return PSMOUSE_TOUCHKIT_PS2; |
| } |
| |
| /* |
| * Reset to defaults in case the device got confused by extended |
| * protocol probes. Note that we follow up with full reset because |
| * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS. |
| */ |
| ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); |
| psmouse_reset(psmouse); |
| |
| if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0) |
| return PSMOUSE_IMEX; |
| |
| if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0) |
| return PSMOUSE_IMPS; |
| |
| /* |
| * Okay, all failed, we have a standard mouse here. The number of the buttons |
| * is still a question, though. We assume 3. |
| */ |
| ps2bare_detect(psmouse, set_properties); |
| |
| if (synaptics_hardware) { |
| /* |
| * We detected Synaptics hardware but it did not respond to IMPS/2 probes. |
| * We need to reset the touchpad because if there is a track point on the |
| * pass through port it could get disabled while probing for protocol |
| * extensions. |
| */ |
| psmouse_reset(psmouse); |
| } |
| |
| return PSMOUSE_PS2; |
| } |
| |
| static const struct psmouse_protocol psmouse_protocols[] = { |
| { |
| .type = PSMOUSE_PS2, |
| .name = "PS/2", |
| .alias = "bare", |
| .maxproto = true, |
| .detect = ps2bare_detect, |
| }, |
| #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP |
| { |
| .type = PSMOUSE_PS2PP, |
| .name = "PS2++", |
| .alias = "logitech", |
| .detect = ps2pp_init, |
| }, |
| #endif |
| { |
| .type = PSMOUSE_THINKPS, |
| .name = "ThinkPS/2", |
| .alias = "thinkps", |
| .detect = thinking_detect, |
| }, |
| { |
| .type = PSMOUSE_GENPS, |
| .name = "GenPS/2", |
| .alias = "genius", |
| .detect = genius_detect, |
| }, |
| { |
| .type = PSMOUSE_IMPS, |
| .name = "ImPS/2", |
| .alias = "imps", |
| .maxproto = true, |
| .detect = intellimouse_detect, |
| }, |
| { |
| .type = PSMOUSE_IMEX, |
| .name = "ImExPS/2", |
| .alias = "exps", |
| .maxproto = true, |
| .detect = im_explorer_detect, |
| }, |
| #ifdef CONFIG_MOUSE_PS2_SYNAPTICS |
| { |
| .type = PSMOUSE_SYNAPTICS, |
| .name = "SynPS/2", |
| .alias = "synaptics", |
| .detect = synaptics_detect, |
| .init = synaptics_init, |
| }, |
| #endif |
| #ifdef CONFIG_MOUSE_PS2_ALPS |
| { |
| .type = PSMOUSE_ALPS, |
| .name = "AlpsPS/2", |
| .alias = "alps", |
| .detect = alps_detect, |
| .init = alps_init, |
| }, |
| #endif |
| #ifdef CONFIG_MOUSE_PS2_LIFEBOOK |
| { |
| .type = PSMOUSE_LIFEBOOK, |
| .name = "LBPS/2", |
| .alias = "lifebook", |
| .init = lifebook_init, |
| }, |
| #endif |
| #ifdef CONFIG_MOUSE_PS2_TRACKPOINT |
| { |
| .type = PSMOUSE_TRACKPOINT, |
| .name = "TPPS/2", |
| .alias = "trackpoint", |
| .detect = trackpoint_detect, |
| }, |
| #endif |
| #ifdef CONFIG_MOUSE_PS2_TOUCHKIT |
| { |
| .type = PSMOUSE_TOUCHKIT_PS2, |
| .name = "touchkitPS/2", |
| .alias = "touchkit", |
| .detect = touchkit_ps2_detect, |
| }, |
| #endif |
| #ifdef CONFIG_MOUSE_PS2_OLPC |
| { |
| .type = PSMOUSE_HGPK, |
| .name = "OLPC HGPK", |
| .alias = "hgpk", |
| .detect = hgpk_detect, |
| }, |
| #endif |
| #ifdef CONFIG_MOUSE_PS2_ELANTECH |
| { |
| .type = PSMOUSE_ELANTECH, |
| .name = "ETPS/2", |
| .alias = "elantech", |
| .detect = elantech_detect, |
| .init = elantech_init, |
| }, |
| #endif |
| #ifdef CONFIG_MOUSE_PS2_SENTELIC |
| { |
| .type = PSMOUSE_FSP, |
| .name = "FSPPS/2", |
| .alias = "fsp", |
| .detect = fsp_detect, |
| .init = fsp_init, |
| }, |
| #endif |
| { |
| .type = PSMOUSE_CORTRON, |
| .name = "CortronPS/2", |
| .alias = "cortps", |
| .detect = cortron_detect, |
| }, |
| { |
| .type = PSMOUSE_AUTO, |
| .name = "auto", |
| .alias = "any", |
| .maxproto = true, |
| }, |
| }; |
| |
| static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) |
| if (psmouse_protocols[i].type == type) |
| return &psmouse_protocols[i]; |
| |
| WARN_ON(1); |
| return &psmouse_protocols[0]; |
| } |
| |
| static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len) |
| { |
| const struct psmouse_protocol *p; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) { |
| p = &psmouse_protocols[i]; |
| |
| if ((strlen(p->name) == len && !strncmp(p->name, name, len)) || |
| (strlen(p->alias) == len && !strncmp(p->alias, name, len))) |
| return &psmouse_protocols[i]; |
| } |
| |
| return NULL; |
| } |
| |
| |
| /* |
| * psmouse_probe() probes for a PS/2 mouse. |
| */ |
| |
| static int psmouse_probe(struct psmouse *psmouse) |
| { |
| struct ps2dev *ps2dev = &psmouse->ps2dev; |
| unsigned char param[2]; |
| |
| /* |
| * First, we check if it's a mouse. It should send 0x00 or 0x03 |
| * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer. |
| * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent |
| * ID queries, probably due to a firmware bug. |
| */ |
| |
| param[0] = 0xa5; |
| if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) |
| return -1; |
| |
| if (param[0] != 0x00 && param[0] != 0x03 && |
| param[0] != 0x04 && param[0] != 0xff) |
| return -1; |
| |
| /* |
| * Then we reset and disable the mouse so that it doesn't generate events. |
| */ |
| |
| if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS)) |
| printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys); |
| |
| return 0; |
| } |
| |
| /* |
| * Here we set the mouse resolution. |
| */ |
| |
| void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) |
| { |
| static const unsigned char params[] = { 0, 1, 2, 2, 3 }; |
| unsigned char p; |
| |
| if (resolution == 0 || resolution > 200) |
| resolution = 200; |
| |
| p = params[resolution / 50]; |
| ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES); |
| psmouse->resolution = 25 << p; |
| } |
| |
| /* |
| * Here we set the mouse report rate. |
| */ |
| |
| static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate) |
| { |
| static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; |
| unsigned char r; |
| int i = 0; |
| |
| while (rates[i] > rate) i++; |
| r = rates[i]; |
| ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); |
| psmouse->rate = r; |
| } |
| |
| /* |
| * psmouse_initialize() initializes the mouse to a sane state. |
| */ |
| |
| static void psmouse_initialize(struct psmouse *psmouse) |
| { |
| /* |
| * We set the mouse report rate, resolution and scaling. |
| */ |
| |
| if (psmouse_max_proto != PSMOUSE_PS2) { |
| psmouse->set_rate(psmouse, psmouse->rate); |
| psmouse->set_resolution(psmouse, psmouse->resolution); |
| ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11); |
| } |
| } |
| |
| /* |
| * psmouse_activate() enables the mouse so that we get motion reports from it. |
| */ |
| |
| static void psmouse_activate(struct psmouse *psmouse) |
| { |
| if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) |
| printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", |
| psmouse->ps2dev.serio->phys); |
| |
| psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); |
| } |
| |
| |
| /* |
| * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion |
| * reports from it unless we explicitly request it. |
| */ |
| |
| static void psmouse_deactivate(struct psmouse *psmouse) |
| { |
| if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) |
| printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n", |
| psmouse->ps2dev.serio->phys); |
| |
| psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); |
| } |
| |
| /* |
| * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it. |
| */ |
| |
| static int psmouse_poll(struct psmouse *psmouse) |
| { |
| return ps2_command(&psmouse->ps2dev, psmouse->packet, |
| PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)); |
| } |
| |
| |
| /* |
| * psmouse_resync() attempts to re-validate current protocol. |
| */ |
| |
| static void psmouse_resync(struct work_struct *work) |
| { |
| struct psmouse *parent = NULL, *psmouse = |
| container_of(work, struct psmouse, resync_work.work); |
| struct serio *serio = psmouse->ps2dev.serio; |
| psmouse_ret_t rc = PSMOUSE_GOOD_DATA; |
| bool failed = false, enabled = false; |
| int i; |
| |
| mutex_lock(&psmouse_mutex); |
| |
| if (psmouse->state != PSMOUSE_RESYNCING) |
| goto out; |
| |
| if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { |
| parent = serio_get_drvdata(serio->parent); |
| psmouse_deactivate(parent); |
| } |
| |
| /* |
| * Some mice don't ACK commands sent while they are in the middle of |
| * transmitting motion packet. To avoid delay we use ps2_sendbyte() |
| * instead of ps2_command() which would wait for 200ms for an ACK |
| * that may never come. |
| * As an additional quirk ALPS touchpads may not only forget to ACK |
| * disable command but will stop reporting taps, so if we see that |
| * mouse at least once ACKs disable we will do full reconnect if ACK |
| * is missing. |
| */ |
| psmouse->num_resyncs++; |
| |
| if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) { |
| if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command) |
| failed = true; |
| } else |
| psmouse->acks_disable_command = true; |
| |
| /* |
| * Poll the mouse. If it was reset the packet will be shorter than |
| * psmouse->pktsize and ps2_command will fail. We do not expect and |
| * do not handle scenario when mouse "upgrades" its protocol while |
| * disconnected since it would require additional delay. If we ever |
| * see a mouse that does it we'll adjust the code. |
| */ |
| if (!failed) { |
| if (psmouse->poll(psmouse)) |
| failed = true; |
| else { |
| psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); |
| for (i = 0; i < psmouse->pktsize; i++) { |
| psmouse->pktcnt++; |
| rc = psmouse->protocol_handler(psmouse); |
| if (rc != PSMOUSE_GOOD_DATA) |
| break; |
| } |
| if (rc != PSMOUSE_FULL_PACKET) |
| failed = true; |
| psmouse_set_state(psmouse, PSMOUSE_RESYNCING); |
| } |
| } |
| /* |
| * Now try to enable mouse. We try to do that even if poll failed and also |
| * repeat our attempts 5 times, otherwise we may be left out with disabled |
| * mouse. |
| */ |
| for (i = 0; i < 5; i++) { |
| if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { |
| enabled = true; |
| break; |
| } |
| msleep(200); |
| } |
| |
| if (!enabled) { |
| printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n", |
| psmouse->ps2dev.serio->phys); |
| failed = true; |
| } |
| |
| if (failed) { |
| psmouse_set_state(psmouse, PSMOUSE_IGNORE); |
| printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n"); |
| serio_reconnect(serio); |
| } else |
| psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); |
| |
| if (parent) |
| psmouse_activate(parent); |
| out: |
| mutex_unlock(&psmouse_mutex); |
| } |
| |
| /* |
| * psmouse_cleanup() resets the mouse into power-on state. |
| */ |
| |
| static void psmouse_cleanup(struct serio *serio) |
| { |
| struct psmouse *psmouse = serio_get_drvdata(serio); |
| struct psmouse *parent = NULL; |
| |
| mutex_lock(&psmouse_mutex); |
| |
| if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { |
| parent = serio_get_drvdata(serio->parent); |
| psmouse_deactivate(parent); |
| } |
| |
| psmouse_deactivate(psmouse); |
| |
| if (psmouse->cleanup) |
| psmouse->cleanup(psmouse); |
| |
| psmouse_reset(psmouse); |
| |
| /* |
| * Some boxes, such as HP nx7400, get terribly confused if mouse |
| * is not fully enabled before suspending/shutting down. |
| */ |
| ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE); |
| |
| if (parent) { |
| if (parent->pt_deactivate) |
| parent->pt_deactivate(parent); |
| |
| psmouse_activate(parent); |
| } |
| |
| mutex_unlock(&psmouse_mutex); |
| } |
| |
| /* |
| * psmouse_disconnect() closes and frees. |
| */ |
| |
| static void psmouse_disconnect(struct serio *serio) |
| { |
| struct psmouse *psmouse, *parent = NULL; |
| |
| psmouse = serio_get_drvdata(serio); |
| |
| sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group); |
| |
| mutex_lock(&psmouse_mutex); |
| |
| psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); |
| |
| /* make sure we don't have a resync in progress */ |
| mutex_unlock(&psmouse_mutex); |
| flush_workqueue(kpsmoused_wq); |
| mutex_lock(&psmouse_mutex); |
| |
| if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { |
| parent = serio_get_drvdata(serio->parent); |
| psmouse_deactivate(parent); |
| } |
| |
| if (psmouse->disconnect) |
| psmouse->disconnect(psmouse); |
| |
| if (parent && parent->pt_deactivate) |
| parent->pt_deactivate(parent); |
| |
| psmouse_set_state(psmouse, PSMOUSE_IGNORE); |
| |
| serio_close(serio); |
| serio_set_drvdata(serio, NULL); |
| input_unregister_device(psmouse->dev); |
| kfree(psmouse); |
| |
| if (parent) |
| psmouse_activate(parent); |
| |
| mutex_unlock(&psmouse_mutex); |
| } |
| |
| static int psmouse_switch_protocol(struct psmouse *psmouse, const struct psmouse_protocol *proto) |
| { |
| struct input_dev *input_dev = psmouse->dev; |
| |
| input_dev->dev.parent = &psmouse->ps2dev.serio->dev; |
| |
| input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); |
| input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | |
| BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT); |
| input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); |
| |
| psmouse->set_rate = psmouse_set_rate; |
| psmouse->set_resolution = psmouse_set_resolution; |
| psmouse->poll = psmouse_poll; |
| psmouse->protocol_handler = psmouse_process_byte; |
| psmouse->pktsize = 3; |
| |
| if (proto && (proto->detect || proto->init)) { |
| if (proto->detect && proto->detect(psmouse, 1) < 0) |
| return -1; |
| |
| if (proto->init && proto->init(psmouse) < 0) |
| return -1; |
| |
| psmouse->type = proto->type; |
| } |
| else |
| psmouse->type = psmouse_extensions(psmouse, |
| psmouse_max_proto, true); |
| |
| /* |
| * If mouse's packet size is 3 there is no point in polling the |
| * device in hopes to detect protocol reset - we won't get less |
| * than 3 bytes response anyhow. |
| */ |
| if (psmouse->pktsize == 3) |
| psmouse->resync_time = 0; |
| |
| /* |
| * Some smart KVMs fake response to POLL command returning just |
| * 3 bytes and messing up our resync logic, so if initial poll |
| * fails we won't try polling the device anymore. Hopefully |
| * such KVM will maintain initially selected protocol. |
| */ |
| if (psmouse->resync_time && psmouse->poll(psmouse)) |
| psmouse->resync_time = 0; |
| |
| snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s", |
| psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name); |
| |
| input_dev->name = psmouse->devname; |
| input_dev->phys = psmouse->phys; |
| input_dev->id.bustype = BUS_I8042; |
| input_dev->id.vendor = 0x0002; |
| input_dev->id.product = psmouse->type; |
| input_dev->id.version = psmouse->model; |
| |
| return 0; |
| } |
| |
| /* |
| * psmouse_connect() is a callback from the serio module when |
| * an unhandled serio port is found. |
| */ |
| static int psmouse_connect(struct serio *serio, struct serio_driver *drv) |
| { |
| struct psmouse *psmouse, *parent = NULL; |
| struct input_dev *input_dev; |
| int retval = 0, error = -ENOMEM; |
| |
| mutex_lock(&psmouse_mutex); |
| |
| /* |
| * If this is a pass-through port deactivate parent so the device |
| * connected to this port can be successfully identified |
| */ |
| if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { |
| parent = serio_get_drvdata(serio->parent); |
| psmouse_deactivate(parent); |
| } |
| |
| psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL); |
| input_dev = input_allocate_device(); |
| if (!psmouse || !input_dev) |
| goto err_free; |
| |
| ps2_init(&psmouse->ps2dev, serio); |
| INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync); |
| psmouse->dev = input_dev; |
| snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys); |
| |
| psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); |
| |
| serio_set_drvdata(serio, psmouse); |
| |
| error = serio_open(serio, drv); |
| if (error) |
| goto err_clear_drvdata; |
| |
| if (psmouse_probe(psmouse) < 0) { |
| error = -ENODEV; |
| goto err_close_serio; |
| } |
| |
| psmouse->rate = psmouse_rate; |
| psmouse->resolution = psmouse_resolution; |
| psmouse->resetafter = psmouse_resetafter; |
| psmouse->resync_time = parent ? 0 : psmouse_resync_time; |
| psmouse->smartscroll = psmouse_smartscroll; |
| |
| psmouse_switch_protocol(psmouse, NULL); |
| |
| psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); |
| psmouse_initialize(psmouse); |
| |
| error = input_register_device(psmouse->dev); |
| if (error) |
| goto err_protocol_disconnect; |
| |
| if (parent && parent->pt_activate) |
| parent->pt_activate(parent); |
| |
| error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group); |
| if (error) |
| goto err_pt_deactivate; |
| |
| psmouse_activate(psmouse); |
| |
| out: |
| /* If this is a pass-through port the parent needs to be re-activated */ |
| if (parent) |
| psmouse_activate(parent); |
| |
| mutex_unlock(&psmouse_mutex); |
| return retval; |
| |
| err_pt_deactivate: |
| if (parent && parent->pt_deactivate) |
| parent->pt_deactivate(parent); |
| input_unregister_device(psmouse->dev); |
| input_dev = NULL; /* so we don't try to free it below */ |
| err_protocol_disconnect: |
| if (psmouse->disconnect) |
| psmouse->disconnect(psmouse); |
| psmouse_set_state(psmouse, PSMOUSE_IGNORE); |
| err_close_serio: |
| serio_close(serio); |
| err_clear_drvdata: |
| serio_set_drvdata(serio, NULL); |
| err_free: |
| input_free_device(input_dev); |
| kfree(psmouse); |
| |
| retval = error; |
| goto out; |
| } |
| |
| |
| static int psmouse_reconnect(struct serio *serio) |
| { |
| struct psmouse *psmouse = serio_get_drvdata(serio); |
| struct psmouse *parent = NULL; |
| struct serio_driver *drv = serio->drv; |
| int rc = -1; |
| |
| if (!drv || !psmouse) { |
| printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n"); |
| return -1; |
| } |
| |
| mutex_lock(&psmouse_mutex); |
| |
| if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { |
| parent = serio_get_drvdata(serio->parent); |
| psmouse_deactivate(parent); |
| } |
| |
| psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); |
| |
| if (psmouse->reconnect) { |
| if (psmouse->reconnect(psmouse)) |
| goto out; |
| } else if (psmouse_probe(psmouse) < 0 || |
| psmouse->type != psmouse_extensions(psmouse, |
| psmouse_max_proto, false)) { |
| goto out; |
| } |
| |
| /* ok, the device type (and capabilities) match the old one, |
| * we can continue using it, complete intialization |
| */ |
| psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); |
| |
| psmouse_initialize(psmouse); |
| |
| if (parent && parent->pt_activate) |
| parent->pt_activate(parent); |
| |
| psmouse_activate(psmouse); |
| rc = 0; |
| |
| out: |
| /* If this is a pass-through port the parent waits to be activated */ |
| if (parent) |
| psmouse_activate(parent); |
| |
| mutex_unlock(&psmouse_mutex); |
| return rc; |
| } |
| |
| static struct serio_device_id psmouse_serio_ids[] = { |
| { |
| .type = SERIO_8042, |
| .proto = SERIO_ANY, |
| .id = SERIO_ANY, |
| .extra = SERIO_ANY, |
| }, |
| { |
| .type = SERIO_PS_PSTHRU, |
| .proto = SERIO_ANY, |
| .id = SERIO_ANY, |
| .extra = SERIO_ANY, |
| }, |
| { 0 } |
| }; |
| |
| MODULE_DEVICE_TABLE(serio, psmouse_serio_ids); |
| |
| static struct serio_driver psmouse_drv = { |
| .driver = { |
| .name = "psmouse", |
| }, |
| .description = DRIVER_DESC, |
| .id_table = psmouse_serio_ids, |
| .interrupt = psmouse_interrupt, |
| .connect = psmouse_connect, |
| .reconnect = psmouse_reconnect, |
| .disconnect = psmouse_disconnect, |
| .cleanup = psmouse_cleanup, |
| }; |
| |
| ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr, |
| char *buf) |
| { |
| struct serio *serio = to_serio_port(dev); |
| struct psmouse_attribute *attr = to_psmouse_attr(devattr); |
| struct psmouse *psmouse; |
| int retval; |
| |
| retval = serio_pin_driver(serio); |
| if (retval) |
| return retval; |
| |
| if (serio->drv != &psmouse_drv) { |
| retval = -ENODEV; |
| goto out; |
| } |
| |
| psmouse = serio_get_drvdata(serio); |
| |
| retval = attr->show(psmouse, attr->data, buf); |
| |
| out: |
| serio_unpin_driver(serio); |
| return retval; |
| } |
| |
| ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr, |
| const char *buf, size_t count) |
| { |
| struct serio *serio = to_serio_port(dev); |
| struct psmouse_attribute *attr = to_psmouse_attr(devattr); |
| struct psmouse *psmouse, *parent = NULL; |
| int retval; |
| |
| retval = serio_pin_driver(serio); |
| if (retval) |
| return retval; |
| |
| if (serio->drv != &psmouse_drv) { |
| retval = -ENODEV; |
| goto out_unpin; |
| } |
| |
| retval = mutex_lock_interruptible(&psmouse_mutex); |
| if (retval) |
| goto out_unpin; |
| |
| psmouse = serio_get_drvdata(serio); |
| |
| if (attr->protect) { |
| if (psmouse->state == PSMOUSE_IGNORE) { |
| retval = -ENODEV; |
| goto out_unlock; |
| } |
| |
| if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { |
| parent = serio_get_drvdata(serio->parent); |
| psmouse_deactivate(parent); |
| } |
| |
| psmouse_deactivate(psmouse); |
| } |
| |
| retval = attr->set(psmouse, attr->data, buf, count); |
| |
| if (attr->protect) { |
| if (retval != -ENODEV) |
| psmouse_activate(psmouse); |
| |
| if (parent) |
| psmouse_activate(parent); |
| } |
| |
| out_unlock: |
| mutex_unlock(&psmouse_mutex); |
| out_unpin: |
| serio_unpin_driver(serio); |
| return retval; |
| } |
| |
| static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf) |
| { |
| unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); |
| |
| return sprintf(buf, "%u\n", *field); |
| } |
| |
| static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count) |
| { |
| unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset); |
| unsigned long value; |
| |
| if (strict_strtoul(buf, 10, &value)) |
| return -EINVAL; |
| |
| if ((unsigned int)value != value) |
| return -EINVAL; |
| |
| *field = value; |
| |
| return count; |
| } |
| |
| static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf) |
| { |
| return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name); |
| } |
| |
| static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count) |
| { |
| struct serio *serio = psmouse->ps2dev.serio; |
| struct psmouse *parent = NULL; |
| struct input_dev *old_dev, *new_dev; |
| const struct psmouse_protocol *proto, *old_proto; |
| int error; |
| int retry = 0; |
| |
| proto = psmouse_protocol_by_name(buf, count); |
| if (!proto) |
| return -EINVAL; |
| |
| if (psmouse->type == proto->type) |
| return count; |
| |
| new_dev = input_allocate_device(); |
| if (!new_dev) |
| return -ENOMEM; |
| |
| while (serio->child) { |
| if (++retry > 3) { |
| printk(KERN_WARNING |
| "psmouse: failed to destroy child port, " |
| "protocol change aborted.\n"); |
| input_free_device(new_dev); |
| return -EIO; |
| } |
| |
| mutex_unlock(&psmouse_mutex); |
| serio_unpin_driver(serio); |
| serio_unregister_child_port(serio); |
| serio_pin_driver_uninterruptible(serio); |
| mutex_lock(&psmouse_mutex); |
| |
| if (serio->drv != &psmouse_drv) { |
| input_free_device(new_dev); |
| return -ENODEV; |
| } |
| |
| if (psmouse->type == proto->type) { |
| input_free_device(new_dev); |
| return count; /* switched by other thread */ |
| } |
| } |
| |
| if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { |
| parent = serio_get_drvdata(serio->parent); |
| if (parent->pt_deactivate) |
| parent->pt_deactivate(parent); |
| } |
| |
| old_dev = psmouse->dev; |
| old_proto = psmouse_protocol_by_type(psmouse->type); |
| |
| if (psmouse->disconnect) |
| psmouse->disconnect(psmouse); |
| |
| psmouse_set_state(psmouse, PSMOUSE_IGNORE); |
| |
| psmouse->dev = new_dev; |
| psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); |
| |
| if (psmouse_switch_protocol(psmouse, proto) < 0) { |
| psmouse_reset(psmouse); |
| /* default to PSMOUSE_PS2 */ |
| psmouse_switch_protocol(psmouse, &psmouse_protocols[0]); |
| } |
| |
| psmouse_initialize(psmouse); |
| psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); |
| |
| error = input_register_device(psmouse->dev); |
| if (error) { |
| if (psmouse->disconnect) |
| psmouse->disconnect(psmouse); |
| |
| psmouse_set_state(psmouse, PSMOUSE_IGNORE); |
| input_free_device(new_dev); |
| psmouse->dev = old_dev; |
| psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); |
| psmouse_switch_protocol(psmouse, old_proto); |
| psmouse_initialize(psmouse); |
| psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); |
| |
| return error; |
| } |
| |
| input_unregister_device(old_dev); |
| |
| if (parent && parent->pt_activate) |
| parent->pt_activate(parent); |
| |
| return count; |
| } |
| |
| static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count) |
| { |
| unsigned long value; |
| |
| if (strict_strtoul(buf, 10, &value)) |
| return -EINVAL; |
| |
| psmouse->set_rate(psmouse, value); |
| return count; |
| } |
| |
| static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count) |
| { |
| unsigned long value; |
| |
| if (strict_strtoul(buf, 10, &value)) |
| return -EINVAL; |
| |
| psmouse->set_resolution(psmouse, value); |
| return count; |
| } |
| |
| |
| static int psmouse_set_maxproto(const char *val, struct kernel_param *kp) |
| { |
| const struct psmouse_protocol *proto; |
| |
| if (!val) |
| return -EINVAL; |
| |
| proto = psmouse_protocol_by_name(val, strlen(val)); |
| |
| if (!proto || !proto->maxproto) |
| return -EINVAL; |
| |
| *((unsigned int *)kp->arg) = proto->type; |
| |
| return 0; |
| } |
| |
| static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp) |
| { |
| int type = *((unsigned int *)kp->arg); |
| |
| return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name); |
| } |
| |
| static int __init psmouse_init(void) |
| { |
| int err; |
| |
| kpsmoused_wq = create_singlethread_workqueue("kpsmoused"); |
| if (!kpsmoused_wq) { |
| printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n"); |
| return -ENOMEM; |
| } |
| |
| err = serio_register_driver(&psmouse_drv); |
| if (err) |
| destroy_workqueue(kpsmoused_wq); |
| |
| return err; |
| } |
| |
| static void __exit psmouse_exit(void) |
| { |
| serio_unregister_driver(&psmouse_drv); |
| destroy_workqueue(kpsmoused_wq); |
| } |
| |
| module_init(psmouse_init); |
| module_exit(psmouse_exit); |