diff options
Diffstat (limited to 'drivers/input/mouse/psmouse-base.c')
| -rw-r--r-- | drivers/input/mouse/psmouse-base.c | 2072 |
1 files changed, 2072 insertions, 0 deletions
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c new file mode 100644 index 0000000000..a0aac76b1e --- /dev/null +++ b/drivers/input/mouse/psmouse-base.c @@ -0,0 +1,2072 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * PS/2 mouse driver + * + * Copyright (c) 1999-2002 Vojtech Pavlik + * Copyright (c) 2003-2004 Dmitry Torokhov + */ + + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#define psmouse_fmt(fmt) fmt + +#include <linux/bitops.h> +#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 <linux/types.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" +#include "cypress_ps2.h" +#include "focaltech.h" +#include "vmmouse.h" +#include "byd.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, const struct kernel_param *); +static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp); +static const struct kernel_param_ops param_ops_proto_abbrev = { + .set = psmouse_set_maxproto, + .get = psmouse_get_maxproto, +}; +#define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int) +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 bool psmouse_smartscroll = true; +module_param_named(smartscroll, psmouse_smartscroll, bool, 0644); +MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled."); + +static bool psmouse_a4tech_2wheels; +module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644); +MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default)."); + +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_dev_attrs[] = { + &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 +}; + +ATTRIBUTE_GROUPS(psmouse_dev); + +/* + * 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 *psmouse_from_serio(struct serio *serio) +{ + struct ps2dev *ps2dev = serio_get_drvdata(serio); + + return container_of(ps2dev, struct psmouse, ps2dev); +} + +void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons) +{ + input_report_key(dev, BTN_LEFT, buttons & BIT(0)); + input_report_key(dev, BTN_MIDDLE, buttons & BIT(2)); + input_report_key(dev, BTN_RIGHT, buttons & BIT(1)); +} + +void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet) +{ + int x, y; + + x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0; + y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0; + + input_report_rel(dev, REL_X, x); + input_report_rel(dev, REL_Y, -y); +} + +void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet) +{ + psmouse_report_standard_buttons(dev, packet[0]); + psmouse_report_standard_motion(dev, packet); +} + +/* + * psmouse_process_byte() analyzes the PS/2 data stream and reports + * relevant events to the input module once full packet has arrived. + */ +psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse) +{ + struct input_dev *dev = psmouse->dev; + u8 *packet = psmouse->packet; + int wheel; + + if (psmouse->pktcnt < psmouse->pktsize) + return PSMOUSE_GOOD_DATA; + + /* Full packet accumulated, process it */ + + switch (psmouse->protocol->type) { + case PSMOUSE_IMPS: + /* IntelliMouse has scroll wheel */ + input_report_rel(dev, REL_WHEEL, -(s8) packet[3]); + break; + + case PSMOUSE_IMEX: + /* Scroll wheel and buttons on IntelliMouse Explorer */ + switch (packet[3] & 0xC0) { + case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */ + input_report_rel(dev, REL_WHEEL, + -sign_extend32(packet[3], 5)); + break; + case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */ + input_report_rel(dev, REL_HWHEEL, + -sign_extend32(packet[3], 5)); + break; + case 0x00: + case 0xC0: + wheel = sign_extend32(packet[3], 3); + + /* + * Some A4Tech mice have two scroll wheels, with first + * one reporting +/-1 in the lower nibble, and second + * one reporting +/-2. + */ + if (psmouse_a4tech_2wheels && abs(wheel) > 1) + input_report_rel(dev, REL_HWHEEL, wheel / 2); + else + input_report_rel(dev, REL_WHEEL, -wheel); + + input_report_key(dev, BTN_SIDE, packet[3] & BIT(4)); + input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5)); + break; + } + break; + + case PSMOUSE_GENPS: + /* Report scroll buttons on NetMice */ + input_report_rel(dev, REL_WHEEL, -(s8) packet[3]); + + /* Extra buttons on Genius NewNet 3D */ + input_report_key(dev, BTN_SIDE, packet[0] & BIT(6)); + input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7)); + break; + + case PSMOUSE_THINKPS: + /* Extra button on ThinkingMouse */ + input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3)); + + /* + * Without this bit of weirdness moving up gives wildly + * high Y changes. + */ + packet[1] |= (packet[0] & 0x40) << 1; + break; + + case PSMOUSE_CORTRON: + /* + * Cortron PS2 Trackball reports SIDE button in the + * 4th bit of the first byte. + */ + input_report_key(dev, BTN_SIDE, packet[0] & BIT(3)); + packet[0] |= BIT(3); + break; + + default: + break; + } + + /* Generic PS/2 Mouse */ + packet[0] |= psmouse->extra_buttons; + psmouse_report_standard_packet(dev, packet); + + 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) { + psmouse_warn(psmouse, + "%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); + psmouse_notice(psmouse, + "issuing reconnect request\n"); + serio_reconnect(psmouse->ps2dev.serio); + return -EIO; + } + } + psmouse->pktcnt = 0; + break; + + case PSMOUSE_FULL_PACKET: + psmouse->pktcnt = 0; + if (psmouse->out_of_sync_cnt) { + psmouse->out_of_sync_cnt = 0; + psmouse_notice(psmouse, + "%s at %s - driver resynced.\n", + psmouse->name, psmouse->phys); + } + break; + + case PSMOUSE_GOOD_DATA: + break; + } + return 0; +} + +static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data) +{ + switch (psmouse->oob_data_type) { + case PSMOUSE_OOB_NONE: + psmouse->oob_data_type = data; + break; + + case PSMOUSE_OOB_EXTRA_BTNS: + psmouse_report_standard_buttons(psmouse->dev, data); + input_sync(psmouse->dev); + + psmouse->extra_buttons = data; + psmouse->oob_data_type = PSMOUSE_OOB_NONE; + break; + + default: + psmouse_warn(psmouse, + "unknown OOB_DATA type: 0x%02x\n", + psmouse->oob_data_type); + psmouse->oob_data_type = PSMOUSE_OOB_NONE; + break; + } +} + +static enum ps2_disposition psmouse_pre_receive_byte(struct ps2dev *ps2dev, + u8 data, + unsigned int flags) +{ + struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev); + + if (psmouse->state == PSMOUSE_IGNORE) + return PS2_IGNORE; + + if (unlikely((flags & SERIO_TIMEOUT) || + ((flags & SERIO_PARITY) && + !psmouse->protocol->ignore_parity))) { + + if (psmouse->state == PSMOUSE_ACTIVATED) + psmouse_warn(psmouse, + "bad data from KBC -%s%s\n", + flags & SERIO_TIMEOUT ? " timeout" : "", + flags & SERIO_PARITY ? " bad parity" : ""); + return PS2_ERROR; + } + + if (flags & SERIO_OOB_DATA) { + psmouse_handle_oob_data(psmouse, data); + return PS2_IGNORE; + } + + return PS2_PROCESS; +} + +static void psmouse_receive_byte(struct ps2dev *ps2dev, u8 data) +{ + struct psmouse *psmouse = container_of(ps2dev, struct psmouse, ps2dev); + + pm_wakeup_event(&ps2dev->serio->dev, 0); + + if (psmouse->state <= PSMOUSE_RESYNCING) + return; + + if (psmouse->state == PSMOUSE_ACTIVATED && + psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) { + psmouse_info(psmouse, "%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); + return; + } + + 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; + return; + } + + if (psmouse->packet[1] == PSMOUSE_RET_ID || + (psmouse->protocol->type == PSMOUSE_HGPK && + psmouse->packet[1] == PSMOUSE_RET_BAT)) { + __psmouse_set_state(psmouse, PSMOUSE_IGNORE); + serio_reconnect(ps2dev->serio); + return; + } + + /* Not a new device, try processing first byte normally */ + psmouse->pktcnt = 1; + if (psmouse_handle_byte(psmouse)) + return; + + 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); + return; + } + + psmouse->last = jiffies; + psmouse_handle_byte(psmouse); +} + +/* + * psmouse_reset() resets the mouse into power-on state. + */ +int psmouse_reset(struct psmouse *psmouse) +{ + u8 param[2]; + int error; + + error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT); + if (error) + return error; + + if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID) + return -EIO; + + return 0; +} + +/* + * Here we set the mouse resolution. + */ +void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution) +{ + static const u8 params[] = { 0, 1, 2, 2, 3 }; + u8 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 u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 }; + u8 r; + int i = 0; + + while (rates[i] > rate) + i++; + r = rates[i]; + ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE); + psmouse->rate = r; +} + +/* + * Here we set the mouse scaling. + */ +static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale) +{ + ps2_command(&psmouse->ps2dev, NULL, + scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 : + PSMOUSE_CMD_SETSCALE11); +} + +/* + * psmouse_poll() - default poll handler. 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)); +} + +static bool psmouse_check_pnp_id(const char *id, const char * const ids[]) +{ + int i; + + for (i = 0; ids[i]; i++) + if (!strcasecmp(id, ids[i])) + return true; + + return false; +} + +/* + * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids. + */ +bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[]) +{ + struct serio *serio = psmouse->ps2dev.serio; + char *p, *fw_id_copy, *save_ptr; + bool found = false; + + if (strncmp(serio->firmware_id, "PNP: ", 5)) + return false; + + fw_id_copy = kstrndup(&serio->firmware_id[5], + sizeof(serio->firmware_id) - 5, + GFP_KERNEL); + if (!fw_id_copy) + return false; + + save_ptr = fw_id_copy; + while ((p = strsep(&fw_id_copy, " ")) != NULL) { + if (psmouse_check_pnp_id(p, ids)) { + found = true; + break; + } + } + + kfree(save_ptr); + return found; +} + +/* + * Genius NetMouse magic init. + */ +static int genius_detect(struct psmouse *psmouse, bool set_properties) +{ + struct ps2dev *ps2dev = &psmouse->ps2dev; + u8 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 -ENODEV; + + if (set_properties) { + __set_bit(BTN_MIDDLE, psmouse->dev->keybit); + __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; + u8 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 -ENODEV; + + 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; + u8 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 -ENODEV; + + /* 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; + u8 param[2]; + static const u8 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 -ENODEV; + + if (set_properties) { + __set_bit(BTN_MIDDLE, psmouse->dev->keybit); + __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"; + + /* + * We have no way of figuring true number of buttons so let's + * assume that the device has 3. + */ + input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE); + } + + 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_MIDDLE, psmouse->dev->keybit); + __set_bit(BTN_SIDE, psmouse->dev->keybit); + } + + return 0; +} + +static const struct psmouse_protocol psmouse_protocols[] = { + { + .type = PSMOUSE_PS2, + .name = "PS/2", + .alias = "bare", + .maxproto = true, + .ignore_parity = true, + .detect = ps2bare_detect, + .try_passthru = true, + }, +#ifdef CONFIG_MOUSE_PS2_LOGIPS2PP + { + .type = PSMOUSE_PS2PP, + .name = "PS2++", + .alias = "logitech", + .detect = ps2pp_detect, + }, +#endif + { + .type = PSMOUSE_THINKPS, + .name = "ThinkPS/2", + .alias = "thinkps", + .detect = thinking_detect, + }, +#ifdef CONFIG_MOUSE_PS2_CYPRESS + { + .type = PSMOUSE_CYPRESS, + .name = "CyPS/2", + .alias = "cypress", + .detect = cypress_detect, + .init = cypress_init, + }, +#endif + { + .type = PSMOUSE_GENPS, + .name = "GenPS/2", + .alias = "genius", + .detect = genius_detect, + }, + { + .type = PSMOUSE_IMPS, + .name = "ImPS/2", + .alias = "imps", + .maxproto = true, + .ignore_parity = true, + .detect = intellimouse_detect, + .try_passthru = true, + }, + { + .type = PSMOUSE_IMEX, + .name = "ImExPS/2", + .alias = "exps", + .maxproto = true, + .ignore_parity = true, + .detect = im_explorer_detect, + .try_passthru = true, + }, +#ifdef CONFIG_MOUSE_PS2_SYNAPTICS + { + .type = PSMOUSE_SYNAPTICS, + .name = "SynPS/2", + .alias = "synaptics", + .detect = synaptics_detect, + .init = synaptics_init_absolute, + }, + { + .type = PSMOUSE_SYNAPTICS_RELATIVE, + .name = "SynRelPS/2", + .alias = "synaptics-relative", + .detect = synaptics_detect, + .init = synaptics_init_relative, + }, +#endif +#ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS + { + .type = PSMOUSE_SYNAPTICS_SMBUS, + .name = "SynSMBus", + .alias = "synaptics-smbus", + .detect = synaptics_detect, + .init = synaptics_init_smbus, + .smbus_companion = true, + }, +#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", + .detect = lifebook_detect, + .init = lifebook_init, + }, +#endif +#ifdef CONFIG_MOUSE_PS2_TRACKPOINT + { + .type = PSMOUSE_TRACKPOINT, + .name = "TPPS/2", + .alias = "trackpoint", + .detect = trackpoint_detect, + .try_passthru = true, + }, +#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_ps2, + }, +#endif +#ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS + { + .type = PSMOUSE_ELANTECH_SMBUS, + .name = "ETSMBus", + .alias = "elantech-smbus", + .detect = elantech_detect, + .init = elantech_init_smbus, + .smbus_companion = true, + }, +#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, + }, +#ifdef CONFIG_MOUSE_PS2_FOCALTECH + { + .type = PSMOUSE_FOCALTECH, + .name = "FocalTechPS/2", + .alias = "focaltech", + .detect = focaltech_detect, + .init = focaltech_init, + }, +#endif +#ifdef CONFIG_MOUSE_PS2_VMMOUSE + { + .type = PSMOUSE_VMMOUSE, + .name = VMMOUSE_PSNAME, + .alias = "vmmouse", + .detect = vmmouse_detect, + .init = vmmouse_init, + }, +#endif +#ifdef CONFIG_MOUSE_PS2_BYD + { + .type = PSMOUSE_BYD, + .name = "BYDPS/2", + .alias = "byd", + .detect = byd_detect, + .init = byd_init, + }, +#endif + { + .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]; + + return NULL; +} + +static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type) +{ + const struct psmouse_protocol *proto; + + proto = __psmouse_protocol_by_type(type); + if (proto) + return proto; + + 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; +} + +/* + * Apply default settings to the psmouse structure. Most of them will + * be overridden by individual protocol initialization routines. + */ +static void psmouse_apply_defaults(struct psmouse *psmouse) +{ + struct input_dev *input_dev = psmouse->dev; + + bitmap_zero(input_dev->evbit, EV_CNT); + bitmap_zero(input_dev->keybit, KEY_CNT); + bitmap_zero(input_dev->relbit, REL_CNT); + bitmap_zero(input_dev->absbit, ABS_CNT); + bitmap_zero(input_dev->mscbit, MSC_CNT); + + input_set_capability(input_dev, EV_KEY, BTN_LEFT); + input_set_capability(input_dev, EV_KEY, BTN_RIGHT); + + input_set_capability(input_dev, EV_REL, REL_X); + input_set_capability(input_dev, EV_REL, REL_Y); + + __set_bit(INPUT_PROP_POINTER, input_dev->propbit); + + psmouse->protocol = &psmouse_protocols[0]; + + psmouse->set_rate = psmouse_set_rate; + psmouse->set_resolution = psmouse_set_resolution; + psmouse->set_scale = psmouse_set_scale; + psmouse->poll = psmouse_poll; + psmouse->protocol_handler = psmouse_process_byte; + psmouse->pktsize = 3; + psmouse->reconnect = NULL; + psmouse->fast_reconnect = NULL; + psmouse->disconnect = NULL; + psmouse->cleanup = NULL; + psmouse->pt_activate = NULL; + psmouse->pt_deactivate = NULL; +} + +static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool), + struct psmouse *psmouse, bool allow_passthrough, + bool set_properties) +{ + if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU && + !allow_passthrough) { + return false; + } + + if (set_properties) + psmouse_apply_defaults(psmouse); + + return detect(psmouse, set_properties) == 0; +} + +static bool psmouse_try_protocol(struct psmouse *psmouse, + enum psmouse_type type, + unsigned int *max_proto, + bool set_properties, bool init_allowed) +{ + const struct psmouse_protocol *proto; + + proto = __psmouse_protocol_by_type(type); + if (!proto) + return false; + + if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru, + set_properties)) + return false; + + if (set_properties && proto->init && init_allowed) { + if (proto->init(psmouse) != 0) { + /* + * We detected device, but init failed. Adjust + * max_proto so we only try standard protocols. + */ + if (*max_proto > PSMOUSE_IMEX) + *max_proto = PSMOUSE_IMEX; + + return false; + } + } + + return true; +} + +/* + * 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 = false; + int ret; + + /* + * Always check for focaltech, this is safe as it uses pnp-id + * matching. + */ + if (psmouse_do_detect(focaltech_detect, + psmouse, false, set_properties)) { + if (max_proto > PSMOUSE_IMEX && + IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) && + (!set_properties || focaltech_init(psmouse) == 0)) { + return PSMOUSE_FOCALTECH; + } + /* + * Restrict psmouse_max_proto so that psmouse_initialize() + * does not try to reset rate and resolution, because even + * that upsets the device. + * This also causes us to basically fall through to basic + * protocol detection, where we fully reset the mouse, + * and set it up as bare PS/2 protocol device. + */ + psmouse_max_proto = max_proto = PSMOUSE_PS2; + } + + /* + * We always check for LifeBook because it does not disturb mouse + * (it only checks DMI information). + */ + if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto, + set_properties, max_proto > PSMOUSE_IMEX)) + return PSMOUSE_LIFEBOOK; + + if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto, + set_properties, max_proto > PSMOUSE_IMEX)) + return PSMOUSE_VMMOUSE; + + /* + * Try Kensington ThinkingMouse (we try first, because Synaptics + * probe upsets the ThinkingMouse). + */ + if (max_proto > PSMOUSE_IMEX && + psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto, + set_properties, true)) { + 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 && + psmouse_do_detect(synaptics_detect, + psmouse, false, set_properties)) { + synaptics_hardware = true; + + if (max_proto > PSMOUSE_IMEX) { + /* + * Try activating protocol, but check if support is + * enabled first, since we try detecting Synaptics + * even when protocol is disabled. + */ + if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) || + IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) { + if (!set_properties) + return PSMOUSE_SYNAPTICS; + + ret = synaptics_init(psmouse); + if (ret >= 0) + return ret; + } + + /* + * 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 Cypress Trackpad. We must try it before Finger Sensing Pad + * because Finger Sensing Pad probe upsets some modules of Cypress + * Trackpads. + */ + if (max_proto > PSMOUSE_IMEX && + psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto, + set_properties, true)) { + return PSMOUSE_CYPRESS; + } + + /* Try ALPS TouchPad */ + if (max_proto > PSMOUSE_IMEX) { + ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); + if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS, + &max_proto, set_properties, true)) + return PSMOUSE_ALPS; + } + + /* Try OLPC HGPK touchpad */ + if (max_proto > PSMOUSE_IMEX && + psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto, + set_properties, true)) { + return PSMOUSE_HGPK; + } + + /* Try Elantech touchpad */ + if (max_proto > PSMOUSE_IMEX && + psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH, + &max_proto, set_properties, false)) { + if (!set_properties) + return PSMOUSE_ELANTECH; + + ret = elantech_init(psmouse); + if (ret >= 0) + return ret; + } + + if (max_proto > PSMOUSE_IMEX) { + if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS, + &max_proto, set_properties, true)) + return PSMOUSE_GENPS; + + if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP, + &max_proto, set_properties, true)) + return PSMOUSE_PS2PP; + + if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT, + &max_proto, set_properties, true)) + return PSMOUSE_TRACKPOINT; + + if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2, + &max_proto, set_properties, true)) + return PSMOUSE_TOUCHKIT_PS2; + } + + /* + * Try Finger Sensing Pad. We do it here because its probe upsets + * Trackpoint devices (causing TP_READ_ID command to time out). + */ + if (max_proto > PSMOUSE_IMEX && + psmouse_try_protocol(psmouse, PSMOUSE_FSP, + &max_proto, set_properties, true)) { + return PSMOUSE_FSP; + } + + /* + * 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 && + psmouse_try_protocol(psmouse, PSMOUSE_IMEX, + &max_proto, set_properties, true)) { + return PSMOUSE_IMEX; + } + + if (max_proto >= PSMOUSE_IMPS && + psmouse_try_protocol(psmouse, PSMOUSE_IMPS, + &max_proto, set_properties, true)) { + 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. + */ + psmouse_try_protocol(psmouse, PSMOUSE_PS2, + &max_proto, set_properties, true); + + 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; +} + +/* + * psmouse_probe() probes for a PS/2 mouse. + */ +static int psmouse_probe(struct psmouse *psmouse) +{ + struct ps2dev *ps2dev = &psmouse->ps2dev; + u8 param[2]; + int error; + + /* + * 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; + error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID); + if (error) + return error; + + if (param[0] != 0x00 && param[0] != 0x03 && + param[0] != 0x04 && param[0] != 0xff) + return -ENODEV; + + /* + * Then we reset and disable the mouse so that it doesn't generate + * events. + */ + error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); + if (error) + psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n", + ps2dev->serio->phys, error); + + return 0; +} + +/* + * 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); + psmouse->set_scale(psmouse, PSMOUSE_SCALE11); + } +} + +/* + * psmouse_activate() enables the mouse so that we get motion reports from it. + */ +int psmouse_activate(struct psmouse *psmouse) +{ + if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { + psmouse_warn(psmouse, "Failed to enable mouse on %s\n", + psmouse->ps2dev.serio->phys); + return -1; + } + + psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); + return 0; +} + +/* + * psmouse_deactivate() puts the mouse into poll mode so that we don't get + * motion reports from it unless we explicitly request it. + */ +int psmouse_deactivate(struct psmouse *psmouse) +{ + int error; + + error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE); + if (error) { + psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n", + psmouse->ps2dev.serio->phys, error); + return error; + } + + psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); + return 0; +} + +/* + * 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 = psmouse_from_serio(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) { + psmouse_warn(psmouse, "failed to re-enable mouse on %s\n", + psmouse->ps2dev.serio->phys); + failed = true; + } + + if (failed) { + psmouse_set_state(psmouse, PSMOUSE_IGNORE); + psmouse_info(psmouse, + "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 = psmouse_from_serio(serio); + struct psmouse *parent = NULL; + + mutex_lock(&psmouse_mutex); + + if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { + parent = psmouse_from_serio(serio->parent); + psmouse_deactivate(parent); + } + + psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); + + /* + * Disable stream mode so cleanup routine can proceed undisturbed. + */ + if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) + psmouse_warn(psmouse, "Failed to disable mouse on %s\n", + psmouse->ps2dev.serio->phys); + + if (psmouse->cleanup) + psmouse->cleanup(psmouse); + + /* + * Reset the mouse to defaults (bare PS/2 protocol). + */ + ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS); + + /* + * 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 = psmouse_from_serio(serio); + struct psmouse *parent = NULL; + + 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 = psmouse_from_serio(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); + + if (psmouse->dev) + 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) +{ + const struct psmouse_protocol *selected_proto; + struct input_dev *input_dev = psmouse->dev; + enum psmouse_type type; + + input_dev->dev.parent = &psmouse->ps2dev.serio->dev; + + if (proto && (proto->detect || proto->init)) { + psmouse_apply_defaults(psmouse); + + if (proto->detect && proto->detect(psmouse, true) < 0) + return -1; + + if (proto->init && proto->init(psmouse) < 0) + return -1; + + selected_proto = proto; + } else { + type = psmouse_extensions(psmouse, psmouse_max_proto, true); + selected_proto = psmouse_protocol_by_type(type); + } + + psmouse->protocol = selected_proto; + + /* + * 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", + selected_proto->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->protocol->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 = psmouse_from_serio(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, + psmouse_pre_receive_byte, psmouse_receive_byte); + 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); + + error = serio_open(serio, drv); + if (error) + goto err_clear_drvdata; + + /* give PT device some time to settle down before probing */ + if (serio->id.type == SERIO_PS_PSTHRU) + usleep_range(10000, 15000); + + 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); + + if (!psmouse->protocol->smbus_companion) { + psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); + psmouse_initialize(psmouse); + + error = input_register_device(input_dev); + if (error) + goto err_protocol_disconnect; + } else { + /* Smbus companion will be reporting events, not us. */ + input_free_device(input_dev); + psmouse->dev = input_dev = NULL; + } + + if (parent && parent->pt_activate) + parent->pt_activate(parent); + + /* + * PS/2 devices having SMBus companions should stay disabled + * on PS/2 side, in order to have SMBus part operable. + */ + if (!psmouse->protocol->smbus_companion) + 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_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, bool fast_reconnect) +{ + struct psmouse *psmouse = psmouse_from_serio(serio); + struct psmouse *parent = NULL; + int (*reconnect_handler)(struct psmouse *); + enum psmouse_type type; + int rc = -1; + + mutex_lock(&psmouse_mutex); + + if (fast_reconnect) { + reconnect_handler = psmouse->fast_reconnect; + if (!reconnect_handler) { + rc = -ENOENT; + goto out_unlock; + } + } else { + reconnect_handler = psmouse->reconnect; + } + + if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { + parent = psmouse_from_serio(serio->parent); + psmouse_deactivate(parent); + } + + psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); + + if (reconnect_handler) { + if (reconnect_handler(psmouse)) + goto out; + } else { + psmouse_reset(psmouse); + + if (psmouse_probe(psmouse) < 0) + goto out; + + type = psmouse_extensions(psmouse, psmouse_max_proto, false); + if (psmouse->protocol->type != type) + goto out; + } + + /* + * OK, the device type (and capabilities) match the old one, + * we can continue using it, complete initialization + */ + if (!psmouse->protocol->smbus_companion) { + psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); + psmouse_initialize(psmouse); + } + + if (parent && parent->pt_activate) + parent->pt_activate(parent); + + /* + * PS/2 devices having SMBus companions should stay disabled + * on PS/2 side, in order to have SMBus part operable. + */ + if (!psmouse->protocol->smbus_companion) + psmouse_activate(psmouse); + + rc = 0; + +out: + /* If this is a pass-through port the parent waits to be activated */ + if (parent) + psmouse_activate(parent); + +out_unlock: + mutex_unlock(&psmouse_mutex); + return rc; +} + +static int psmouse_reconnect(struct serio *serio) +{ + return __psmouse_reconnect(serio, false); +} + +static int psmouse_fast_reconnect(struct serio *serio) +{ + return __psmouse_reconnect(serio, true); +} + +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", + .dev_groups = psmouse_dev_groups, + }, + .description = DRIVER_DESC, + .id_table = psmouse_serio_ids, + .interrupt = ps2_interrupt, + .connect = psmouse_connect, + .reconnect = psmouse_reconnect, + .fast_reconnect = psmouse_fast_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 = psmouse_from_serio(serio); + + if (psmouse->protocol->smbus_companion && + devattr != &psmouse_attr_protocol.dattr) + return -ENOENT; + + return attr->show(psmouse, attr->data, buf); +} + +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 = mutex_lock_interruptible(&psmouse_mutex); + if (retval) + goto out; + + psmouse = psmouse_from_serio(serio); + + if (psmouse->protocol->smbus_companion && + devattr != &psmouse_attr_protocol.dattr) { + retval = -ENOENT; + goto out_unlock; + } + + if (attr->protect) { + if (psmouse->state == PSMOUSE_IGNORE) { + retval = -ENODEV; + goto out_unlock; + } + + if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { + parent = psmouse_from_serio(serio->parent); + psmouse_deactivate(parent); + } + + if (!psmouse->protocol->smbus_companion) + psmouse_deactivate(psmouse); + } + + retval = attr->set(psmouse, attr->data, buf, count); + + if (attr->protect) { + if (retval != -ENODEV && !psmouse->protocol->smbus_companion) + psmouse_activate(psmouse); + + if (parent) + psmouse_activate(parent); + } + + out_unlock: + mutex_unlock(&psmouse_mutex); + out: + 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 int value; + int err; + + err = kstrtouint(buf, 10, &value); + if (err) + return err; + + *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->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->protocol == proto) + return count; + + new_dev = input_allocate_device(); + if (!new_dev) + return -ENOMEM; + + while (!list_empty(&serio->children)) { + if (++retry > 3) { + psmouse_warn(psmouse, + "failed to destroy children ports, protocol change aborted.\n"); + input_free_device(new_dev); + return -EIO; + } + + mutex_unlock(&psmouse_mutex); + serio_unregister_child_port(serio); + mutex_lock(&psmouse_mutex); + + if (serio->drv != &psmouse_drv) { + input_free_device(new_dev); + return -ENODEV; + } + + if (psmouse->protocol == proto) { + input_free_device(new_dev); + return count; /* switched by other thread */ + } + } + + if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) { + parent = psmouse_from_serio(serio->parent); + if (parent->pt_deactivate) + parent->pt_deactivate(parent); + } + + old_dev = psmouse->dev; + old_proto = psmouse->protocol; + + 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); + + if (psmouse->protocol->smbus_companion) { + input_free_device(psmouse->dev); + psmouse->dev = NULL; + } else { + 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; + } + } + + if (old_dev) + 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 int value; + int err; + + err = kstrtouint(buf, 10, &value); + if (err) + return err; + + 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 int value; + int err; + + err = kstrtouint(buf, 10, &value); + if (err) + return err; + + psmouse->set_resolution(psmouse, value); + return count; +} + + +static int psmouse_set_maxproto(const char *val, const 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, const struct kernel_param *kp) +{ + int type = *((unsigned int *)kp->arg); + + return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name); +} + +static int __init psmouse_init(void) +{ + int err; + + lifebook_module_init(); + synaptics_module_init(); + hgpk_module_init(); + + err = psmouse_smbus_module_init(); + if (err) + return err; + + kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0); + if (!kpsmoused_wq) { + pr_err("failed to create kpsmoused workqueue\n"); + err = -ENOMEM; + goto err_smbus_exit; + } + + err = serio_register_driver(&psmouse_drv); + if (err) + goto err_destroy_wq; + + return 0; + +err_destroy_wq: + destroy_workqueue(kpsmoused_wq); +err_smbus_exit: + psmouse_smbus_module_exit(); + return err; +} + +static void __exit psmouse_exit(void) +{ + serio_unregister_driver(&psmouse_drv); + destroy_workqueue(kpsmoused_wq); + psmouse_smbus_module_exit(); +} + +module_init(psmouse_init); +module_exit(psmouse_exit); |