From mboxrd@z Thu Jan 1 00:00:00 1970 From: JJ Ding Subject: Re: [PATCH v5 7/8] Input: elantech - add v3 hardware support Date: Mon, 05 Sep 2011 15:10:01 +0800 Message-ID: <874o0rqxbq.fsf@emc.com.tw> References: <1315189007-2179-1-git-send-email-jj_ding@emc.com.tw> <1315189007-2179-8-git-send-email-jj_ding@emc.com.tw> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: base64 Return-path: Received: from emcscan.emc.com.tw ([192.72.220.5]:24384 "EHLO emcscan.emc.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750762Ab1IEHHs (ORCPT ); Mon, 5 Sep 2011 03:07:48 -0400 In-Reply-To: Sender: linux-input-owner@vger.kernel.org List-Id: linux-input@vger.kernel.org To: Daniel Kurtz Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Seth Forshee , Dmitry Torokhov , Aaron Huang , Tom Lin , =?utf-8?Q?=C3=89ric?= Piel , Chase Douglas , Henrik Rydberg , Alessandro Rubini 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Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751097Ab1IEHH4 (ORCPT ); Mon, 5 Sep 2011 03:07:56 -0400 Received: from emcscan.emc.com.tw ([192.72.220.5]:24384 "EHLO emcscan.emc.com.tw" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750762Ab1IEHHs (ORCPT ); Mon, 5 Sep 2011 03:07:48 -0400 From: JJ Ding To: Daniel Kurtz Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, Seth Forshee , Dmitry Torokhov , Aaron Huang , Tom Lin , =?utf-8?Q?=C3=89ric?= Piel , Chase Douglas , Henrik Rydberg , Alessandro Rubini Subject: Re: [PATCH v5 7/8] Input: elantech - add v3 hardware support In-Reply-To: References: <1315189007-2179-1-git-send-email-jj_ding@emc.com.tw> <1315189007-2179-8-git-send-email-jj_ding@emc.com.tw> User-Agent: Notmuch/0.7 (http://notmuchmail.org) Emacs/23.2.1 (i686-pc-linux-gnu) Date: Mon, 05 Sep 2011 15:10:01 +0800 Message-ID: <874o0rqxbq.fsf@emc.com.tw> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by nfs id p8578620006396 Hi Daniel, On Mon, 5 Sep 2011 12:35:28 +0800, Daniel Kurtz wrote: > Hi JJ, > > On Mon, Sep 5, 2011 at 10:16 AM, JJ Ding wrote: > > diff --git a/drivers/input/mouse/elantech.c b/drivers/input/mouse/elantech.c > > index 2ae7c49..c4ceefd 100644 > > --- a/drivers/input/mouse/elantech.c > > +++ b/drivers/input/mouse/elantech.c > > @@ -108,6 +108,16 @@ static int elantech_read_reg(struct psmouse *psmouse, unsigned char reg, > >                        rc = -1; > >                } > >                break; > > + > > +       case 3: > > +               if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || > > +                   elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || > > +                   elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || > > +                   elantech_ps2_command(psmouse, NULL, reg) || > > +                   elantech_ps2_command(psmouse, param, PSMOUSE_CMD_GETINFO)) { > > +                       rc = -1; > > +               } > > +               break; > >        } > > > >        if (rc) > > @@ -154,6 +164,18 @@ static int elantech_write_reg(struct psmouse *psmouse, unsigned char reg, > >                        rc = -1; > >                } > >                break; > > + > > +       case 3: > > +               if (elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || > > +                   elantech_ps2_command(psmouse, NULL, ETP_REGISTER_READWRITE) || > > +                   elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || > > +                   elantech_ps2_command(psmouse, NULL, reg) || > > +                   elantech_ps2_command(psmouse, NULL, ETP_PS2_CUSTOM_COMMAND) || > > +                   elantech_ps2_command(psmouse, NULL, val) || > > +                   elantech_ps2_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11)) { > > +                       rc = -1; > > +               } > > +               break; > >        } > > > >        if (rc) > > @@ -350,6 +372,84 @@ static void elantech_report_absolute_v2(struct psmouse *psmouse) > >        input_sync(dev); > >  } > > > > +/* > > + * Interpret complete data packets and report absolute mode input events for > > + * hardware version 3. (12 byte packets for two fingers) > > + */ > > +static void elantech_report_absolute_v3(struct psmouse *psmouse, > > +                                       int packet_type) > > +{ > > +       struct input_dev *dev = psmouse->dev; > > +       struct elantech_data *etd = psmouse->private; > > +       unsigned char *packet = psmouse->packet; > > +       unsigned int fingers = 0, x1 = 0, y1 = 0, x2 = 0, y2 = 0; > > +       unsigned int width = 0, pres = 0; > > + > > +       /* byte 0: n1  n0   .   .   .   .   R   L */ > > +       fingers = (packet[0] & 0xc0) >> 6; > > + > > +       switch (fingers) { > > +       case 3: > > +       case 1: > > +               /* > > +                * byte 1:  .   .   .   .  x11 x10 x9  x8 > > +                * byte 2: x7  x6  x5  x4  x4  x2  x1  x0 > > +                */ > > +               x1 = ((packet[1] & 0x0f) << 8) | packet[2]; > > +               /* > > +                * byte 4:  .   .   .   .  y11 y10 y9  y8 > > +                * byte 5: y7  y6  y5  y4  y3  y2  y1  y0 > > +                */ > > +               y1 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); > > +               break; > > + > > +       case 2: > > +               if (packet_type == PACKET_V3_HEAD) { > > +                       /* > > +                        * byte 1:   .    .    .    .  ax11 ax10 ax9  ax8 > > +                        * byte 2: ax7  ax6  ax5  ax4  ax3  ax2  ax1  ax0 > > +                        */ > > +                       etd->prev_x = ((packet[1] & 0x0f) << 8) | packet[2]; > > +                       /* > > +                        * byte 4:   .    .    .    .  ay11 ay10 ay9  ay8 > > +                        * byte 5: ay7  ay6  ay5  ay4  ay3  ay2  ay1  ay0 > > +                        */ > > +                       etd->prev_y = etd->y_max - > > +                               (((packet[4] & 0x0f) << 8) | packet[5]); > > +                       /* > > +                        * wait for next packet > > +                        */ > > +                       return; > > +               } > > + > > +               /* packet_type == PACKET_V3_TAIL */ > > +               x1 = etd->prev_x; > > +               y1 = etd->prev_y; > > +               x2 = ((packet[1] & 0x0f) << 8) | packet[2]; > > +               y2 = etd->y_max - (((packet[4] & 0x0f) << 8) | packet[5]); > > +               break; > > +       } > > + > > +       pres = (packet[1] & 0xf0) | ((packet[4] & 0xf0) >> 4); > > +       width = ((packet[0] & 0x30) >> 2) | ((packet[3] & 0x30) >> 4); > > + > > +       input_report_key(dev, BTN_TOUCH, fingers != 0); > > +       if (fingers != 0) { > > +               input_report_abs(dev, ABS_X, x1); > > +               input_report_abs(dev, ABS_Y, y1); > > +       } > > +       elantech_report_semi_mt_data(dev, fingers, x1, y1, x2, y2); > > Originally, v3 was using semi-mt, which reported corner coordinates of > a box containing at least two of the N touches on the touchpad. I > thought this was due to hardware limitation. > > If the hardware really can report true positions for (up to) 3 > contacts, then using pure MT-B is a good approach. This driver still > seems to mix semi-mt and MT-B together a bit. > > Can you report all three contacts in their own slots, 0, 1 and 2, > instead of just reoprting two of them with 0,1? > > Also, when reporting the 'legacy single touch' coordinate (ABS_X, > ABS_Y), please use: > input_mt_report_pointer_emulation(), instead of always reporting the > last (x1,y1). Otherwise the single touch point will bounce back and > forth between 1st and 3rd touch. v3 can only track the true positions of two fingers. With 3 finger touch, it reports the lowest value of x and the biggest value of y, among the three fingers. v3 changed the protocol so it could report 2-finger touch data w/o reduced resolution and improved the hardware to truly track 2 fingers independently, otherwise it's pretty much the same as v2. > > +       input_report_key(dev, BTN_TOOL_FINGER, fingers == 1); > > +       input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2); > > +       input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3); > > Use input_mt_report_pointer_emulation() with use_count = true. This > will also report ABS_PRESURE (but not ABS_TOOL_WIDTH, unfortunately). > > > +       input_report_key(dev, BTN_LEFT, packet[0] & 0x01); > > +       input_report_key(dev, BTN_RIGHT, packet[0] & 0x02); > > +       input_report_abs(dev, ABS_PRESSURE, pres); > > +       input_report_abs(dev, ABS_TOOL_WIDTH, width); > > + > > +       input_sync(dev); > > +} > > + > >  static int elantech_packet_check_v1(struct psmouse *psmouse) > >  { > >        struct elantech_data *etd = psmouse->private; > > @@ -403,11 +503,37 @@ static int elantech_packet_check_v2(struct psmouse *psmouse) > >  } > > > >  /* > > + * We check the constant bits to determine what packet type we get, > > + * so packet checking is mandatory for v3 hardware. > > + */ > > +static int elantech_packet_check_v3(struct psmouse *psmouse) > > +{ > > +       const u8 debounce_packet[] = { 0xc4, 0xff, 0xff, 0x02, 0xff, 0xff }; > > +       unsigned char *packet = psmouse->packet; > > + > > +       /* > > +        * check debounce first, it has the same signature in byte 0 > > +        * and byte 3 as PACKET_V3_HEAD. > > +        */ > > +       if (!memcmp(packet, debounce_packet, sizeof(debounce_packet))) > > +               return PACKET_DEBOUNCE; > > + > > +       if ((packet[0] & 0x0c) == 0x04 && (packet[3] & 0xcf) == 0x02) > > +               return PACKET_V3_HEAD; > > + > > +       if ((packet[0] & 0x0c) == 0x0c && (packet[3] & 0xce) == 0x0c) > > +               return PACKET_V3_TAIL; > > + > > +       return PACKET_UNKNOWN; > > +} > > + > > +/* > >  * Process byte stream from mouse and handle complete packets > >  */ > >  static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) > >  { > >        struct elantech_data *etd = psmouse->private; > > +       int packet_type; > > > >        if (psmouse->pktcnt < psmouse->pktsize) > >                return PSMOUSE_GOOD_DATA; > > @@ -429,6 +555,18 @@ static psmouse_ret_t elantech_process_byte(struct psmouse *psmouse) > > > >                elantech_report_absolute_v2(psmouse); > >                break; > > + > > +       case 3: > > +               packet_type = elantech_packet_check_v3(psmouse); > > +               /* ignore debounce */ > > +               if (packet_type == PACKET_DEBOUNCE) > > +                       return PSMOUSE_FULL_PACKET; > > + > > +               if (packet_type == PACKET_UNKNOWN) > > +                       return PSMOUSE_BAD_DATA; > > + > > +               elantech_report_absolute_v3(psmouse, packet_type); > > +               break; > >        } > > > >        return PSMOUSE_FULL_PACKET; > > @@ -463,8 +601,15 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse) > >                    elantech_write_reg(psmouse, 0x11, etd->reg_11) || > >                    elantech_write_reg(psmouse, 0x21, etd->reg_21)) { > >                        rc = -1; > > -                       break; > >                } > > +               break; > > + > > +       case 3: > > +               etd->reg_10 = 0x0b; > > +               if (elantech_write_reg(psmouse, 0x10, etd->reg_10)) > > +                       rc = -1; > > + > > +               break; > >        } > > > >        if (rc == 0) { > > @@ -498,11 +643,12 @@ static int elantech_set_absolute_mode(struct psmouse *psmouse) > >        return rc; > >  } > > > > -static void set_range(struct psmouse *psmouse, unsigned int *x_min, > > +static int set_range(struct psmouse *psmouse, unsigned int *x_min, > >                     unsigned int *y_min, unsigned int *x_max, > >                     unsigned int *y_max) > >  { > >        struct elantech_data *etd = psmouse->private; > > +       unsigned char param[3]; > >        int i; > > > >        switch (etd->hw_version) { > > @@ -530,19 +676,30 @@ static void set_range(struct psmouse *psmouse, unsigned int *x_min, > >                        *y_max = (etd->capabilities[2] - i) * 64; > >                } > >                break; > > + > > +       case 3: > > +               if (synaptics_send_cmd(psmouse, ETP_FW_ID_QUERY, param)) > > +                       return -1; > > + > > +               *x_max = (0x0f & param[0]) << 8 | param[1]; > > +               *y_max = (0xf0 & param[0]) << 4 | param[2]; > > +               break; > >        } > > + > > +       return 0; > >  } > > > >  /* > >  * Set the appropriate event bits for the input subsystem > >  */ > > -static void elantech_set_input_params(struct psmouse *psmouse) > > +static int elantech_set_input_params(struct psmouse *psmouse) > >  { > >        struct input_dev *dev = psmouse->dev; > >        struct elantech_data *etd = psmouse->private; > >        unsigned int x_min = 0, y_min = 0, x_max = 0, y_max = 0; > > > > -       set_range(psmouse, &x_min, &y_min, &x_max, &y_max); > > +       if (set_range(psmouse, &x_min, &y_min, &x_max, &y_max)) > > +               return -1; > > > >        __set_bit(EV_KEY, dev->evbit); > >        __set_bit(EV_ABS, dev->evbit); > > @@ -570,6 +727,9 @@ static void elantech_set_input_params(struct psmouse *psmouse) > > > >        case 2: > >                __set_bit(BTN_TOOL_QUADTAP, dev->keybit); > > +               __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); > > +               /* fall through */ > > +       case 3: > >                input_set_abs_params(dev, ABS_X, x_min, x_max, 0, 0); > >                input_set_abs_params(dev, ABS_Y, y_min, y_max, 0, 0); > >                if (etd->reports_pressure) { > > @@ -578,7 +738,6 @@ static void elantech_set_input_params(struct psmouse *psmouse) > >                        input_set_abs_params(dev, ABS_TOOL_WIDTH, ETP_WMIN_V2, > >                                             ETP_WMAX_V2, 0, 0); > >                } > > -               __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); > >                input_mt_init_slots(dev, 2); > > Should this be 3? > > >                input_set_abs_params(dev, ABS_MT_POSITION_X, x_min, x_max, 0, 0); > >                input_set_abs_params(dev, ABS_MT_POSITION_Y, y_min, y_max, 0, 0); > > @@ -586,6 +745,8 @@ static void elantech_set_input_params(struct psmouse *psmouse) > >        } > > > >        etd->y_max = y_max; > > + > > +       return 0; > >  } > > > >  struct elantech_attr_data { > > @@ -727,7 +888,8 @@ int elantech_detect(struct psmouse *psmouse, bool set_properties) > >         * Report this in case there are Elantech models that use a different > >         * set of magic numbers > >         */ > > -       if (param[0] != 0x3c || param[1] != 0x03 || param[2] != 0xc8) { > > +       if (param[0] != 0x3c || param[1] != 0x03 || > > +           (param[2] != 0xc8 && param[2] != 0x00)) { > >                pr_debug("unexpected magic knock result 0x%02x, 0x%02x, 0x%02x.\n", > >                         param[0], param[1], param[2]); > >                return -1; > > @@ -793,16 +955,16 @@ static int elantech_reconnect(struct psmouse *psmouse) > >  /* > >  * determine hardware version and set some properties according to it. > >  */ > > -static void elantech_set_properties(struct elantech_data *etd) > > +static int elantech_set_properties(struct elantech_data *etd) > >  { > > -       /* > > -        * Assume every version greater than 0x020030 is new EeePC style > > -        * hardware with 6 byte packets, except 0x020600 > > -        */ > >        if (etd->fw_version < 0x020030 || etd->fw_version == 0x020600) > >                etd->hw_version = 1; > > -       else > > +       else if (etd->fw_version < 0x150600) > >                etd->hw_version = 2; > > +       else if ((etd->fw_version & 0x0f0000) >> 16 == 5) > > +               etd->hw_version = 3; > > +       else > > +               return -1; > > > >        /* > >         * Turn on packet checking by default. > > @@ -817,13 +979,15 @@ static void elantech_set_properties(struct elantech_data *etd) > >        etd->jumpy_cursor = > >                (etd->fw_version == 0x020022 || etd->fw_version == 0x020600); > > > > -       if (etd->hw_version == 2) { > > +       if (etd->hw_version > 1) { > >                /* For now show extra debug information */ > >                etd->debug = 1; > > > >                if (etd->fw_version >= 0x020800) > >                        etd->reports_pressure = true; > >        } > > + > > +       return 0; > >  } > > > >  /* > > @@ -850,9 +1014,12 @@ int elantech_init(struct psmouse *psmouse) > >                pr_err("failed to query firmware version.\n"); > >                goto init_fail; > >        } > > - > >        etd->fw_version = (param[0] << 16) | (param[1] << 8) | param[2]; > > -       elantech_set_properties(etd); > > + > > +       if (elantech_set_properties(etd)) { > > +               pr_err("unknown hardware version, aborting...\n"); > > +               goto init_fail; > > +       } > >        pr_info("assuming hardware version %d " > >                "(with firmware version 0x%02x%02x%02x)\n", > >                etd->hw_version, param[0], param[1], param[2]); > > @@ -871,7 +1038,10 @@ int elantech_init(struct psmouse *psmouse) > >                goto init_fail; > >        } > > > > -       elantech_set_input_params(psmouse); > > +       if (elantech_set_input_params(psmouse)) { > > +               pr_err("failed to query touchpad range.\n"); > > +               goto init_fail; > > +       } > > > >        error = sysfs_create_group(&psmouse->ps2dev.serio->dev.kobj, > >                                   &elantech_attr_group); > > @@ -883,7 +1053,7 @@ int elantech_init(struct psmouse *psmouse) > >        psmouse->protocol_handler = elantech_process_byte; > >        psmouse->disconnect = elantech_disconnect; > >        psmouse->reconnect = elantech_reconnect; > > -       psmouse->pktsize = etd->hw_version == 2 ? 6 : 4; > > +       psmouse->pktsize = etd->hw_version > 1 ? 6 : 4; > > > >        return 0; > > > > diff --git a/drivers/input/mouse/elantech.h b/drivers/input/mouse/elantech.h > > index d9e6144..236c33c 100644 > > --- a/drivers/input/mouse/elantech.h > > +++ b/drivers/input/mouse/elantech.h > > @@ -16,6 +16,7 @@ > >  /* > >  * Command values for Synaptics style queries > >  */ > > +#define ETP_FW_ID_QUERY                        0x00 > >  #define ETP_FW_VERSION_QUERY           0x01 > >  #define ETP_CAPABILITIES_QUERY         0x02 > > > > @@ -24,6 +25,7 @@ > >  */ > >  #define ETP_REGISTER_READ              0x10 > >  #define ETP_REGISTER_WRITE             0x11 > > +#define ETP_REGISTER_READWRITE         0x00 > > > >  /* > >  * Hardware version 2 custom PS/2 command value > > @@ -79,6 +81,14 @@ > >  #define ETP_WMIN_V2                    0 > >  #define ETP_WMAX_V2                    15 > > > > +/* > > + * v3 hardware has 2 kinds of packet types. > > + */ > > +#define PACKET_UNKNOWN                 0x01 > > +#define PACKET_DEBOUNCE                        0x02 > > +#define PACKET_V3_HEAD                 0x03 > > +#define PACKET_V3_TAIL                 0x04 > > + > >  struct elantech_data { > >        unsigned char reg_10; > >        unsigned char reg_11; > > @@ -98,6 +108,8 @@ struct elantech_data { > >        unsigned int fw_version; > >        unsigned int single_finger_reports; > >        unsigned int y_max; > > +       unsigned int prev_x; > > +       unsigned int prev_y; > >        unsigned char parity[256]; > >  }; > > > > -- > > 1.7.4.1 > > > {.n++%ݶw{.n+{G{ayʇڙ,jfhz_(階ݢj"mG?&~iOzv^m ?I