| /* |
| * Apple USB BCM5974 (Macbook Air and Penryn Macbook Pro) multitouch driver |
| * |
| * Copyright (C) 2008 Henrik Rydberg (rydberg@euromail.se) |
| * |
| * The USB initialization and package decoding was made by |
| * Scott Shawcroft as part of the touchd user-space driver project: |
| * Copyright (C) 2008 Scott Shawcroft (scott.shawcroft@gmail.com) |
| * |
| * The BCM5974 driver is based on the appletouch driver: |
| * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com) |
| * Copyright (C) 2005 Johannes Berg (johannes@sipsolutions.net) |
| * Copyright (C) 2005 Stelian Pop (stelian@popies.net) |
| * Copyright (C) 2005 Frank Arnold (frank@scirocco-5v-turbo.de) |
| * Copyright (C) 2005 Peter Osterlund (petero2@telia.com) |
| * Copyright (C) 2005 Michael Hanselmann (linux-kernel@hansmi.ch) |
| * Copyright (C) 2006 Nicolas Boichat (nicolas@boichat.ch) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/module.h> |
| #include <linux/usb/input.h> |
| #include <linux/hid.h> |
| #include <linux/mutex.h> |
| |
| #define USB_VENDOR_ID_APPLE 0x05ac |
| |
| /* MacbookAir, aka wellspring */ |
| #define USB_DEVICE_ID_APPLE_WELLSPRING_ANSI 0x0223 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING_ISO 0x0224 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING_JIS 0x0225 |
| /* MacbookProPenryn, aka wellspring2 */ |
| #define USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI 0x0230 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING2_ISO 0x0231 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING2_JIS 0x0232 |
| /* Macbook5,1 (unibody), aka wellspring3 */ |
| #define USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI 0x0236 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING3_ISO 0x0237 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING3_JIS 0x0238 |
| /* MacbookAir3,2 (unibody), aka wellspring5 */ |
| #define USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI 0x023f |
| #define USB_DEVICE_ID_APPLE_WELLSPRING4_ISO 0x0240 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING4_JIS 0x0241 |
| /* MacbookAir3,1 (unibody), aka wellspring4 */ |
| #define USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI 0x0242 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO 0x0243 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS 0x0244 |
| /* Macbook8 (unibody, March 2011) */ |
| #define USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI 0x0245 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING5_ISO 0x0246 |
| #define USB_DEVICE_ID_APPLE_WELLSPRING5_JIS 0x0247 |
| |
| #define BCM5974_DEVICE(prod) { \ |
| .match_flags = (USB_DEVICE_ID_MATCH_DEVICE | \ |
| USB_DEVICE_ID_MATCH_INT_CLASS | \ |
| USB_DEVICE_ID_MATCH_INT_PROTOCOL), \ |
| .idVendor = USB_VENDOR_ID_APPLE, \ |
| .idProduct = (prod), \ |
| .bInterfaceClass = USB_INTERFACE_CLASS_HID, \ |
| .bInterfaceProtocol = USB_INTERFACE_PROTOCOL_MOUSE \ |
| } |
| |
| /* table of devices that work with this driver */ |
| static const struct usb_device_id bcm5974_table[] = { |
| /* MacbookAir1.1 */ |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ANSI), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_ISO), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING_JIS), |
| /* MacbookProPenryn */ |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_ISO), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING2_JIS), |
| /* Macbook5,1 */ |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_ISO), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING3_JIS), |
| /* MacbookAir3,2 */ |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_ISO), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4_JIS), |
| /* MacbookAir3,1 */ |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS), |
| /* MacbookPro8 */ |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_ISO), |
| BCM5974_DEVICE(USB_DEVICE_ID_APPLE_WELLSPRING5_JIS), |
| /* Terminating entry */ |
| {} |
| }; |
| MODULE_DEVICE_TABLE(usb, bcm5974_table); |
| |
| MODULE_AUTHOR("Henrik Rydberg"); |
| MODULE_DESCRIPTION("Apple USB BCM5974 multitouch driver"); |
| MODULE_LICENSE("GPL"); |
| |
| #define dprintk(level, format, a...)\ |
| { if (debug >= level) printk(KERN_DEBUG format, ##a); } |
| |
| static int debug = 1; |
| module_param(debug, int, 0644); |
| MODULE_PARM_DESC(debug, "Activate debugging output"); |
| |
| /* button data structure */ |
| struct bt_data { |
| u8 unknown1; /* constant */ |
| u8 button; /* left button */ |
| u8 rel_x; /* relative x coordinate */ |
| u8 rel_y; /* relative y coordinate */ |
| }; |
| |
| /* trackpad header types */ |
| enum tp_type { |
| TYPE1, /* plain trackpad */ |
| TYPE2 /* button integrated in trackpad */ |
| }; |
| |
| /* trackpad finger data offsets, le16-aligned */ |
| #define FINGER_TYPE1 (13 * sizeof(__le16)) |
| #define FINGER_TYPE2 (15 * sizeof(__le16)) |
| |
| /* trackpad button data offsets */ |
| #define BUTTON_TYPE2 15 |
| |
| /* list of device capability bits */ |
| #define HAS_INTEGRATED_BUTTON 1 |
| |
| /* trackpad finger structure, le16-aligned */ |
| struct tp_finger { |
| __le16 origin; /* zero when switching track finger */ |
| __le16 abs_x; /* absolute x coodinate */ |
| __le16 abs_y; /* absolute y coodinate */ |
| __le16 rel_x; /* relative x coodinate */ |
| __le16 rel_y; /* relative y coodinate */ |
| __le16 size_major; /* finger size, major axis? */ |
| __le16 size_minor; /* finger size, minor axis? */ |
| __le16 orientation; /* 16384 when point, else 15 bit angle */ |
| __le16 force_major; /* trackpad force, major axis? */ |
| __le16 force_minor; /* trackpad force, minor axis? */ |
| __le16 unused[3]; /* zeros */ |
| __le16 multi; /* one finger: varies, more fingers: constant */ |
| } __attribute__((packed,aligned(2))); |
| |
| /* trackpad finger data size, empirically at least ten fingers */ |
| #define SIZEOF_FINGER sizeof(struct tp_finger) |
| #define SIZEOF_ALL_FINGERS (16 * SIZEOF_FINGER) |
| #define MAX_FINGER_ORIENTATION 16384 |
| |
| /* device-specific parameters */ |
| struct bcm5974_param { |
| int dim; /* logical dimension */ |
| int fuzz; /* logical noise value */ |
| int devmin; /* device minimum reading */ |
| int devmax; /* device maximum reading */ |
| }; |
| |
| /* device-specific configuration */ |
| struct bcm5974_config { |
| int ansi, iso, jis; /* the product id of this device */ |
| int caps; /* device capability bitmask */ |
| int bt_ep; /* the endpoint of the button interface */ |
| int bt_datalen; /* data length of the button interface */ |
| int tp_ep; /* the endpoint of the trackpad interface */ |
| enum tp_type tp_type; /* type of trackpad interface */ |
| int tp_offset; /* offset to trackpad finger data */ |
| int tp_datalen; /* data length of the trackpad interface */ |
| struct bcm5974_param p; /* finger pressure limits */ |
| struct bcm5974_param w; /* finger width limits */ |
| struct bcm5974_param x; /* horizontal limits */ |
| struct bcm5974_param y; /* vertical limits */ |
| }; |
| |
| /* logical device structure */ |
| struct bcm5974 { |
| char phys[64]; |
| struct usb_device *udev; /* usb device */ |
| struct usb_interface *intf; /* our interface */ |
| struct input_dev *input; /* input dev */ |
| struct bcm5974_config cfg; /* device configuration */ |
| struct mutex pm_mutex; /* serialize access to open/suspend */ |
| int opened; /* 1: opened, 0: closed */ |
| struct urb *bt_urb; /* button usb request block */ |
| struct bt_data *bt_data; /* button transferred data */ |
| struct urb *tp_urb; /* trackpad usb request block */ |
| u8 *tp_data; /* trackpad transferred data */ |
| int fingers; /* number of fingers on trackpad */ |
| }; |
| |
| /* logical dimensions */ |
| #define DIM_PRESSURE 256 /* maximum finger pressure */ |
| #define DIM_WIDTH 16 /* maximum finger width */ |
| #define DIM_X 1280 /* maximum trackpad x value */ |
| #define DIM_Y 800 /* maximum trackpad y value */ |
| |
| /* logical signal quality */ |
| #define SN_PRESSURE 45 /* pressure signal-to-noise ratio */ |
| #define SN_WIDTH 100 /* width signal-to-noise ratio */ |
| #define SN_COORD 250 /* coordinate signal-to-noise ratio */ |
| |
| /* pressure thresholds */ |
| #define PRESSURE_LOW (2 * DIM_PRESSURE / SN_PRESSURE) |
| #define PRESSURE_HIGH (3 * PRESSURE_LOW) |
| |
| /* device constants */ |
| static const struct bcm5974_config bcm5974_config_table[] = { |
| { |
| USB_DEVICE_ID_APPLE_WELLSPRING_ANSI, |
| USB_DEVICE_ID_APPLE_WELLSPRING_ISO, |
| USB_DEVICE_ID_APPLE_WELLSPRING_JIS, |
| 0, |
| 0x84, sizeof(struct bt_data), |
| 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS, |
| { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, |
| { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, |
| { DIM_X, DIM_X / SN_COORD, -4824, 5342 }, |
| { DIM_Y, DIM_Y / SN_COORD, -172, 5820 } |
| }, |
| { |
| USB_DEVICE_ID_APPLE_WELLSPRING2_ANSI, |
| USB_DEVICE_ID_APPLE_WELLSPRING2_ISO, |
| USB_DEVICE_ID_APPLE_WELLSPRING2_JIS, |
| 0, |
| 0x84, sizeof(struct bt_data), |
| 0x81, TYPE1, FINGER_TYPE1, FINGER_TYPE1 + SIZEOF_ALL_FINGERS, |
| { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 256 }, |
| { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, |
| { DIM_X, DIM_X / SN_COORD, -4824, 4824 }, |
| { DIM_Y, DIM_Y / SN_COORD, -172, 4290 } |
| }, |
| { |
| USB_DEVICE_ID_APPLE_WELLSPRING3_ANSI, |
| USB_DEVICE_ID_APPLE_WELLSPRING3_ISO, |
| USB_DEVICE_ID_APPLE_WELLSPRING3_JIS, |
| HAS_INTEGRATED_BUTTON, |
| 0x84, sizeof(struct bt_data), |
| 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS, |
| { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 }, |
| { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, |
| { DIM_X, DIM_X / SN_COORD, -4460, 5166 }, |
| { DIM_Y, DIM_Y / SN_COORD, -75, 6700 } |
| }, |
| { |
| USB_DEVICE_ID_APPLE_WELLSPRING4_ANSI, |
| USB_DEVICE_ID_APPLE_WELLSPRING4_ISO, |
| USB_DEVICE_ID_APPLE_WELLSPRING4_JIS, |
| HAS_INTEGRATED_BUTTON, |
| 0x84, sizeof(struct bt_data), |
| 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS, |
| { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 }, |
| { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, |
| { DIM_X, DIM_X / SN_COORD, -4620, 5140 }, |
| { DIM_Y, DIM_Y / SN_COORD, -150, 6600 } |
| }, |
| { |
| USB_DEVICE_ID_APPLE_WELLSPRING4A_ANSI, |
| USB_DEVICE_ID_APPLE_WELLSPRING4A_ISO, |
| USB_DEVICE_ID_APPLE_WELLSPRING4A_JIS, |
| HAS_INTEGRATED_BUTTON, |
| 0x84, sizeof(struct bt_data), |
| 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS, |
| { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 }, |
| { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, |
| { DIM_X, DIM_X / SN_COORD, -4616, 5112 }, |
| { DIM_Y, DIM_Y / SN_COORD, -142, 5234 } |
| }, |
| { |
| USB_DEVICE_ID_APPLE_WELLSPRING5_ANSI, |
| USB_DEVICE_ID_APPLE_WELLSPRING5_ISO, |
| USB_DEVICE_ID_APPLE_WELLSPRING5_JIS, |
| HAS_INTEGRATED_BUTTON, |
| 0x84, sizeof(struct bt_data), |
| 0x81, TYPE2, FINGER_TYPE2, FINGER_TYPE2 + SIZEOF_ALL_FINGERS, |
| { DIM_PRESSURE, DIM_PRESSURE / SN_PRESSURE, 0, 300 }, |
| { DIM_WIDTH, DIM_WIDTH / SN_WIDTH, 0, 2048 }, |
| { DIM_X, DIM_X / SN_COORD, -4415, 5050 }, |
| { DIM_Y, DIM_Y / SN_COORD, -55, 6680 } |
| }, |
| {} |
| }; |
| |
| /* return the device-specific configuration by device */ |
| static const struct bcm5974_config *bcm5974_get_config(struct usb_device *udev) |
| { |
| u16 id = le16_to_cpu(udev->descriptor.idProduct); |
| const struct bcm5974_config *cfg; |
| |
| for (cfg = bcm5974_config_table; cfg->ansi; ++cfg) |
| if (cfg->ansi == id || cfg->iso == id || cfg->jis == id) |
| return cfg; |
| |
| return bcm5974_config_table; |
| } |
| |
| /* convert 16-bit little endian to signed integer */ |
| static inline int raw2int(__le16 x) |
| { |
| return (signed short)le16_to_cpu(x); |
| } |
| |
| /* scale device data to logical dimensions (asserts devmin < devmax) */ |
| static inline int int2scale(const struct bcm5974_param *p, int x) |
| { |
| return x * p->dim / (p->devmax - p->devmin); |
| } |
| |
| /* all logical value ranges are [0,dim). */ |
| static inline int int2bound(const struct bcm5974_param *p, int x) |
| { |
| int s = int2scale(p, x); |
| |
| return clamp_val(s, 0, p->dim - 1); |
| } |
| |
| /* setup which logical events to report */ |
| static void setup_events_to_report(struct input_dev *input_dev, |
| const struct bcm5974_config *cfg) |
| { |
| __set_bit(EV_ABS, input_dev->evbit); |
| |
| input_set_abs_params(input_dev, ABS_PRESSURE, |
| 0, cfg->p.dim, cfg->p.fuzz, 0); |
| input_set_abs_params(input_dev, ABS_TOOL_WIDTH, |
| 0, cfg->w.dim, cfg->w.fuzz, 0); |
| input_set_abs_params(input_dev, ABS_X, |
| 0, cfg->x.dim, cfg->x.fuzz, 0); |
| input_set_abs_params(input_dev, ABS_Y, |
| 0, cfg->y.dim, cfg->y.fuzz, 0); |
| |
| /* finger touch area */ |
| input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, |
| cfg->w.devmin, cfg->w.devmax, 0, 0); |
| input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, |
| cfg->w.devmin, cfg->w.devmax, 0, 0); |
| /* finger approach area */ |
| input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, |
| cfg->w.devmin, cfg->w.devmax, 0, 0); |
| input_set_abs_params(input_dev, ABS_MT_WIDTH_MINOR, |
| cfg->w.devmin, cfg->w.devmax, 0, 0); |
| /* finger orientation */ |
| input_set_abs_params(input_dev, ABS_MT_ORIENTATION, |
| -MAX_FINGER_ORIENTATION, |
| MAX_FINGER_ORIENTATION, 0, 0); |
| /* finger position */ |
| input_set_abs_params(input_dev, ABS_MT_POSITION_X, |
| cfg->x.devmin, cfg->x.devmax, 0, 0); |
| input_set_abs_params(input_dev, ABS_MT_POSITION_Y, |
| cfg->y.devmin, cfg->y.devmax, 0, 0); |
| |
| __set_bit(EV_KEY, input_dev->evbit); |
| __set_bit(BTN_TOUCH, input_dev->keybit); |
| __set_bit(BTN_TOOL_FINGER, input_dev->keybit); |
| __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit); |
| __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); |
| __set_bit(BTN_TOOL_QUADTAP, input_dev->keybit); |
| __set_bit(BTN_LEFT, input_dev->keybit); |
| |
| input_set_events_per_packet(input_dev, 60); |
| } |
| |
| /* report button data as logical button state */ |
| static int report_bt_state(struct bcm5974 *dev, int size) |
| { |
| if (size != sizeof(struct bt_data)) |
| return -EIO; |
| |
| dprintk(7, |
| "bcm5974: button data: %x %x %x %x\n", |
| dev->bt_data->unknown1, dev->bt_data->button, |
| dev->bt_data->rel_x, dev->bt_data->rel_y); |
| |
| input_report_key(dev->input, BTN_LEFT, dev->bt_data->button); |
| input_sync(dev->input); |
| |
| return 0; |
| } |
| |
| static void report_finger_data(struct input_dev *input, |
| const struct bcm5974_config *cfg, |
| const struct tp_finger *f) |
| { |
| input_report_abs(input, ABS_MT_TOUCH_MAJOR, |
| raw2int(f->force_major) << 1); |
| input_report_abs(input, ABS_MT_TOUCH_MINOR, |
| raw2int(f->force_minor) << 1); |
| input_report_abs(input, ABS_MT_WIDTH_MAJOR, |
| raw2int(f->size_major) << 1); |
| input_report_abs(input, ABS_MT_WIDTH_MINOR, |
| raw2int(f->size_minor) << 1); |
| input_report_abs(input, ABS_MT_ORIENTATION, |
| MAX_FINGER_ORIENTATION - raw2int(f->orientation)); |
| input_report_abs(input, ABS_MT_POSITION_X, raw2int(f->abs_x)); |
| input_report_abs(input, ABS_MT_POSITION_Y, |
| cfg->y.devmin + cfg->y.devmax - raw2int(f->abs_y)); |
| input_mt_sync(input); |
| } |
| |
| /* report trackpad data as logical trackpad state */ |
| static int report_tp_state(struct bcm5974 *dev, int size) |
| { |
| const struct bcm5974_config *c = &dev->cfg; |
| const struct tp_finger *f; |
| struct input_dev *input = dev->input; |
| int raw_p, raw_w, raw_x, raw_y, raw_n, i; |
| int ptest, origin, ibt = 0, nmin = 0, nmax = 0; |
| int abs_p = 0, abs_w = 0, abs_x = 0, abs_y = 0; |
| |
| if (size < c->tp_offset || (size - c->tp_offset) % SIZEOF_FINGER != 0) |
| return -EIO; |
| |
| /* finger data, le16-aligned */ |
| f = (const struct tp_finger *)(dev->tp_data + c->tp_offset); |
| raw_n = (size - c->tp_offset) / SIZEOF_FINGER; |
| |
| /* always track the first finger; when detached, start over */ |
| if (raw_n) { |
| |
| /* report raw trackpad data */ |
| for (i = 0; i < raw_n; i++) |
| report_finger_data(input, c, &f[i]); |
| |
| raw_p = raw2int(f->force_major); |
| raw_w = raw2int(f->size_major); |
| raw_x = raw2int(f->abs_x); |
| raw_y = raw2int(f->abs_y); |
| |
| dprintk(9, |
| "bcm5974: " |
| "raw: p: %+05d w: %+05d x: %+05d y: %+05d n: %d\n", |
| raw_p, raw_w, raw_x, raw_y, raw_n); |
| |
| ptest = int2bound(&c->p, raw_p); |
| origin = raw2int(f->origin); |
| |
| /* while tracking finger still valid, count all fingers */ |
| if (ptest > PRESSURE_LOW && origin) { |
| abs_p = ptest; |
| abs_w = int2bound(&c->w, raw_w); |
| abs_x = int2bound(&c->x, raw_x - c->x.devmin); |
| abs_y = int2bound(&c->y, c->y.devmax - raw_y); |
| while (raw_n--) { |
| ptest = int2bound(&c->p, |
| raw2int(f->force_major)); |
| if (ptest > PRESSURE_LOW) |
| nmax++; |
| if (ptest > PRESSURE_HIGH) |
| nmin++; |
| f++; |
| } |
| } |
| } |
| |
| /* set the integrated button if applicable */ |
| if (c->tp_type == TYPE2) |
| ibt = raw2int(dev->tp_data[BUTTON_TYPE2]); |
| |
| if (dev->fingers < nmin) |
| dev->fingers = nmin; |
| if (dev->fingers > nmax) |
| dev->fingers = nmax; |
| |
| input_report_key(input, BTN_TOUCH, dev->fingers > 0); |
| input_report_key(input, BTN_TOOL_FINGER, dev->fingers == 1); |
| input_report_key(input, BTN_TOOL_DOUBLETAP, dev->fingers == 2); |
| input_report_key(input, BTN_TOOL_TRIPLETAP, dev->fingers == 3); |
| input_report_key(input, BTN_TOOL_QUADTAP, dev->fingers > 3); |
| |
| input_report_abs(input, ABS_PRESSURE, abs_p); |
| input_report_abs(input, ABS_TOOL_WIDTH, abs_w); |
| |
| if (abs_p) { |
| input_report_abs(input, ABS_X, abs_x); |
| input_report_abs(input, ABS_Y, abs_y); |
| |
| dprintk(8, |
| "bcm5974: abs: p: %+05d w: %+05d x: %+05d y: %+05d " |
| "nmin: %d nmax: %d n: %d ibt: %d\n", abs_p, abs_w, |
| abs_x, abs_y, nmin, nmax, dev->fingers, ibt); |
| |
| } |
| |
| /* type 2 reports button events via ibt only */ |
| if (c->tp_type == TYPE2) |
| input_report_key(input, BTN_LEFT, ibt); |
| |
| input_sync(input); |
| |
| return 0; |
| } |
| |
| /* Wellspring initialization constants */ |
| #define BCM5974_WELLSPRING_MODE_READ_REQUEST_ID 1 |
| #define BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID 9 |
| #define BCM5974_WELLSPRING_MODE_REQUEST_VALUE 0x300 |
| #define BCM5974_WELLSPRING_MODE_REQUEST_INDEX 0 |
| #define BCM5974_WELLSPRING_MODE_VENDOR_VALUE 0x01 |
| #define BCM5974_WELLSPRING_MODE_NORMAL_VALUE 0x08 |
| |
| static int bcm5974_wellspring_mode(struct bcm5974 *dev, bool on) |
| { |
| char *data = kmalloc(8, GFP_KERNEL); |
| int retval = 0, size; |
| |
| if (!data) { |
| err("bcm5974: out of memory"); |
| retval = -ENOMEM; |
| goto out; |
| } |
| |
| /* read configuration */ |
| size = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0), |
| BCM5974_WELLSPRING_MODE_READ_REQUEST_ID, |
| USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| BCM5974_WELLSPRING_MODE_REQUEST_VALUE, |
| BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); |
| |
| if (size != 8) { |
| err("bcm5974: could not read from device"); |
| retval = -EIO; |
| goto out; |
| } |
| |
| /* apply the mode switch */ |
| data[0] = on ? |
| BCM5974_WELLSPRING_MODE_VENDOR_VALUE : |
| BCM5974_WELLSPRING_MODE_NORMAL_VALUE; |
| |
| /* write configuration */ |
| size = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), |
| BCM5974_WELLSPRING_MODE_WRITE_REQUEST_ID, |
| USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
| BCM5974_WELLSPRING_MODE_REQUEST_VALUE, |
| BCM5974_WELLSPRING_MODE_REQUEST_INDEX, data, 8, 5000); |
| |
| if (size != 8) { |
| err("bcm5974: could not write to device"); |
| retval = -EIO; |
| goto out; |
| } |
| |
| dprintk(2, "bcm5974: switched to %s mode.\n", |
| on ? "wellspring" : "normal"); |
| |
| out: |
| kfree(data); |
| return retval; |
| } |
| |
| static void bcm5974_irq_button(struct urb *urb) |
| { |
| struct bcm5974 *dev = urb->context; |
| int error; |
| |
| switch (urb->status) { |
| case 0: |
| break; |
| case -EOVERFLOW: |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| dbg("bcm5974: button urb shutting down: %d", urb->status); |
| return; |
| default: |
| dbg("bcm5974: button urb status: %d", urb->status); |
| goto exit; |
| } |
| |
| if (report_bt_state(dev, dev->bt_urb->actual_length)) |
| dprintk(1, "bcm5974: bad button package, length: %d\n", |
| dev->bt_urb->actual_length); |
| |
| exit: |
| error = usb_submit_urb(dev->bt_urb, GFP_ATOMIC); |
| if (error) |
| err("bcm5974: button urb failed: %d", error); |
| } |
| |
| static void bcm5974_irq_trackpad(struct urb *urb) |
| { |
| struct bcm5974 *dev = urb->context; |
| int error; |
| |
| switch (urb->status) { |
| case 0: |
| break; |
| case -EOVERFLOW: |
| case -ECONNRESET: |
| case -ENOENT: |
| case -ESHUTDOWN: |
| dbg("bcm5974: trackpad urb shutting down: %d", urb->status); |
| return; |
| default: |
| dbg("bcm5974: trackpad urb status: %d", urb->status); |
| goto exit; |
| } |
| |
| /* control response ignored */ |
| if (dev->tp_urb->actual_length == 2) |
| goto exit; |
| |
| if (report_tp_state(dev, dev->tp_urb->actual_length)) |
| dprintk(1, "bcm5974: bad trackpad package, length: %d\n", |
| dev->tp_urb->actual_length); |
| |
| exit: |
| error = usb_submit_urb(dev->tp_urb, GFP_ATOMIC); |
| if (error) |
| err("bcm5974: trackpad urb failed: %d", error); |
| } |
| |
| /* |
| * The Wellspring trackpad, like many recent Apple trackpads, share |
| * the usb device with the keyboard. Since keyboards are usually |
| * handled by the HID system, the device ends up being handled by two |
| * modules. Setting up the device therefore becomes slightly |
| * complicated. To enable multitouch features, a mode switch is |
| * required, which is usually applied via the control interface of the |
| * device. It can be argued where this switch should take place. In |
| * some drivers, like appletouch, the switch is made during |
| * probe. However, the hid module may also alter the state of the |
| * device, resulting in trackpad malfunction under certain |
| * circumstances. To get around this problem, there is at least one |
| * example that utilizes the USB_QUIRK_RESET_RESUME quirk in order to |
| * recieve a reset_resume request rather than the normal resume. |
| * Since the implementation of reset_resume is equal to mode switch |
| * plus start_traffic, it seems easier to always do the switch when |
| * starting traffic on the device. |
| */ |
| static int bcm5974_start_traffic(struct bcm5974 *dev) |
| { |
| int error; |
| |
| error = bcm5974_wellspring_mode(dev, true); |
| if (error) { |
| dprintk(1, "bcm5974: mode switch failed\n"); |
| goto err_out; |
| } |
| |
| error = usb_submit_urb(dev->bt_urb, GFP_KERNEL); |
| if (error) |
| goto err_reset_mode; |
| |
| error = usb_submit_urb(dev->tp_urb, GFP_KERNEL); |
| if (error) |
| goto err_kill_bt; |
| |
| return 0; |
| |
| err_kill_bt: |
| usb_kill_urb(dev->bt_urb); |
| err_reset_mode: |
| bcm5974_wellspring_mode(dev, false); |
| err_out: |
| return error; |
| } |
| |
| static void bcm5974_pause_traffic(struct bcm5974 *dev) |
| { |
| usb_kill_urb(dev->tp_urb); |
| usb_kill_urb(dev->bt_urb); |
| bcm5974_wellspring_mode(dev, false); |
| } |
| |
| /* |
| * The code below implements open/close and manual suspend/resume. |
| * All functions may be called in random order. |
| * |
| * Opening a suspended device fails with EACCES - permission denied. |
| * |
| * Failing a resume leaves the device resumed but closed. |
| */ |
| static int bcm5974_open(struct input_dev *input) |
| { |
| struct bcm5974 *dev = input_get_drvdata(input); |
| int error; |
| |
| error = usb_autopm_get_interface(dev->intf); |
| if (error) |
| return error; |
| |
| mutex_lock(&dev->pm_mutex); |
| |
| error = bcm5974_start_traffic(dev); |
| if (!error) |
| dev->opened = 1; |
| |
| mutex_unlock(&dev->pm_mutex); |
| |
| if (error) |
| usb_autopm_put_interface(dev->intf); |
| |
| return error; |
| } |
| |
| static void bcm5974_close(struct input_dev *input) |
| { |
| struct bcm5974 *dev = input_get_drvdata(input); |
| |
| mutex_lock(&dev->pm_mutex); |
| |
| bcm5974_pause_traffic(dev); |
| dev->opened = 0; |
| |
| mutex_unlock(&dev->pm_mutex); |
| |
| usb_autopm_put_interface(dev->intf); |
| } |
| |
| static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message) |
| { |
| struct bcm5974 *dev = usb_get_intfdata(iface); |
| |
| mutex_lock(&dev->pm_mutex); |
| |
| if (dev->opened) |
| bcm5974_pause_traffic(dev); |
| |
| mutex_unlock(&dev->pm_mutex); |
| |
| return 0; |
| } |
| |
| static int bcm5974_resume(struct usb_interface *iface) |
| { |
| struct bcm5974 *dev = usb_get_intfdata(iface); |
| int error = 0; |
| |
| mutex_lock(&dev->pm_mutex); |
| |
| if (dev->opened) |
| error = bcm5974_start_traffic(dev); |
| |
| mutex_unlock(&dev->pm_mutex); |
| |
| return error; |
| } |
| |
| static int bcm5974_probe(struct usb_interface *iface, |
| const struct usb_device_id *id) |
| { |
| struct usb_device *udev = interface_to_usbdev(iface); |
| const struct bcm5974_config *cfg; |
| struct bcm5974 *dev; |
| struct input_dev *input_dev; |
| int error = -ENOMEM; |
| |
| /* find the product index */ |
| cfg = bcm5974_get_config(udev); |
| |
| /* allocate memory for our device state and initialize it */ |
| dev = kzalloc(sizeof(struct bcm5974), GFP_KERNEL); |
| input_dev = input_allocate_device(); |
| if (!dev || !input_dev) { |
| err("bcm5974: out of memory"); |
| goto err_free_devs; |
| } |
| |
| dev->udev = udev; |
| dev->intf = iface; |
| dev->input = input_dev; |
| dev->cfg = *cfg; |
| mutex_init(&dev->pm_mutex); |
| |
| /* setup urbs */ |
| dev->bt_urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!dev->bt_urb) |
| goto err_free_devs; |
| |
| dev->tp_urb = usb_alloc_urb(0, GFP_KERNEL); |
| if (!dev->tp_urb) |
| goto err_free_bt_urb; |
| |
| dev->bt_data = usb_alloc_coherent(dev->udev, |
| dev->cfg.bt_datalen, GFP_KERNEL, |
| &dev->bt_urb->transfer_dma); |
| if (!dev->bt_data) |
| goto err_free_urb; |
| |
| dev->tp_data = usb_alloc_coherent(dev->udev, |
| dev->cfg.tp_datalen, GFP_KERNEL, |
| &dev->tp_urb->transfer_dma); |
| if (!dev->tp_data) |
| goto err_free_bt_buffer; |
| |
| usb_fill_int_urb(dev->bt_urb, udev, |
| usb_rcvintpipe(udev, cfg->bt_ep), |
| dev->bt_data, dev->cfg.bt_datalen, |
| bcm5974_irq_button, dev, 1); |
| |
| usb_fill_int_urb(dev->tp_urb, udev, |
| usb_rcvintpipe(udev, cfg->tp_ep), |
| dev->tp_data, dev->cfg.tp_datalen, |
| bcm5974_irq_trackpad, dev, 1); |
| |
| /* create bcm5974 device */ |
| usb_make_path(udev, dev->phys, sizeof(dev->phys)); |
| strlcat(dev->phys, "/input0", sizeof(dev->phys)); |
| |
| input_dev->name = "bcm5974"; |
| input_dev->phys = dev->phys; |
| usb_to_input_id(dev->udev, &input_dev->id); |
| /* report driver capabilities via the version field */ |
| input_dev->id.version = cfg->caps; |
| input_dev->dev.parent = &iface->dev; |
| |
| input_set_drvdata(input_dev, dev); |
| |
| input_dev->open = bcm5974_open; |
| input_dev->close = bcm5974_close; |
| |
| setup_events_to_report(input_dev, cfg); |
| |
| error = input_register_device(dev->input); |
| if (error) |
| goto err_free_buffer; |
| |
| /* save our data pointer in this interface device */ |
| usb_set_intfdata(iface, dev); |
| |
| return 0; |
| |
| err_free_buffer: |
| usb_free_coherent(dev->udev, dev->cfg.tp_datalen, |
| dev->tp_data, dev->tp_urb->transfer_dma); |
| err_free_bt_buffer: |
| usb_free_coherent(dev->udev, dev->cfg.bt_datalen, |
| dev->bt_data, dev->bt_urb->transfer_dma); |
| err_free_urb: |
| usb_free_urb(dev->tp_urb); |
| err_free_bt_urb: |
| usb_free_urb(dev->bt_urb); |
| err_free_devs: |
| usb_set_intfdata(iface, NULL); |
| input_free_device(input_dev); |
| kfree(dev); |
| return error; |
| } |
| |
| static void bcm5974_disconnect(struct usb_interface *iface) |
| { |
| struct bcm5974 *dev = usb_get_intfdata(iface); |
| |
| usb_set_intfdata(iface, NULL); |
| |
| input_unregister_device(dev->input); |
| usb_free_coherent(dev->udev, dev->cfg.tp_datalen, |
| dev->tp_data, dev->tp_urb->transfer_dma); |
| usb_free_coherent(dev->udev, dev->cfg.bt_datalen, |
| dev->bt_data, dev->bt_urb->transfer_dma); |
| usb_free_urb(dev->tp_urb); |
| usb_free_urb(dev->bt_urb); |
| kfree(dev); |
| } |
| |
| static struct usb_driver bcm5974_driver = { |
| .name = "bcm5974", |
| .probe = bcm5974_probe, |
| .disconnect = bcm5974_disconnect, |
| .suspend = bcm5974_suspend, |
| .resume = bcm5974_resume, |
| .id_table = bcm5974_table, |
| .supports_autosuspend = 1, |
| }; |
| |
| static int __init bcm5974_init(void) |
| { |
| return usb_register(&bcm5974_driver); |
| } |
| |
| static void __exit bcm5974_exit(void) |
| { |
| usb_deregister(&bcm5974_driver); |
| } |
| |
| module_init(bcm5974_init); |
| module_exit(bcm5974_exit); |
| |