From patchwork Wed Oct 17 12:51:14 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Leitner X-Patchwork-Id: 10645815 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 95F5D109C for ; Wed, 17 Oct 2018 16:02:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 84CCD2860B for ; Wed, 17 Oct 2018 16:02:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 776A72861E; Wed, 17 Oct 2018 16:02:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.3 required=2.0 tests=BAYES_00,DATE_IN_PAST_03_06, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6A7402860B for ; Wed, 17 Oct 2018 16:02:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727731AbeJQX7N (ORCPT ); Wed, 17 Oct 2018 19:59:13 -0400 Received: from mail2.skidata.com ([91.230.2.91]:45071 "EHLO mail2.skidata.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727095AbeJQX7N (ORCPT ); Wed, 17 Oct 2018 19:59:13 -0400 X-Greylist: delayed 316 seconds by postgrey-1.27 at vger.kernel.org; Wed, 17 Oct 2018 19:59:11 EDT X-IronPort-AV: E=Sophos;i="5.54,393,1534802400"; d="scan'208";a="1732774" From: Richard Leitner To: , , CC: , , , Richard Leitner Subject: [PATCH v2 6/8] Input: sx8654 - add sx8650 support Date: Wed, 17 Oct 2018 14:51:14 +0200 Message-ID: <20181017125116.20077-7-richard.leitner@skidata.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20181017125116.20077-1-richard.leitner@skidata.com> References: <20181017125116.20077-1-richard.leitner@skidata.com> MIME-Version: 1.0 X-Originating-IP: [192.168.111.252] X-ClientProxiedBy: sdex5srv.skidata.net (192.168.111.83) To sdex5srv.skidata.net (192.168.111.83) Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The sx8654 and sx8650 are quite similar, therefore add support for the sx8650 within the sx8654 driver. Signed-off-by: Richard Leitner --- drivers/input/touchscreen/sx8654.c | 193 +++++++++++++++++++++++++++++++++---- 1 file changed, 173 insertions(+), 20 deletions(-) diff --git a/drivers/input/touchscreen/sx8654.c b/drivers/input/touchscreen/sx8654.c index afa4da138fe9..4939863efbef 100644 --- a/drivers/input/touchscreen/sx8654.c +++ b/drivers/input/touchscreen/sx8654.c @@ -29,7 +29,7 @@ #include #include -#include +#include #include #include #include @@ -44,9 +44,11 @@ #define I2C_REG_IRQSRC 0x23 #define I2C_REG_SOFTRESET 0x3f +#define I2C_REG_SX8650_STAT 0x05 +#define SX8650_STAT_CONVIRQ 0x80 + /* commands */ #define CMD_READ_REGISTER 0x40 -#define CMD_MANUAL 0xc0 #define CMD_PENTRG 0xe0 /* value for I2C_REG_SOFTRESET */ @@ -58,6 +60,7 @@ /* bits for RegTouch1 */ #define CONDIRQ 0x20 +#define RPDNT_100K 0x00 #define FILT_7SA 0x03 /* bits for I2C_REG_CHANMASK */ @@ -71,14 +74,122 @@ /* power delay: lower nibble of CTRL0 register */ #define POWDLY_1_1MS 0x0b +/* for sx8650, as we have no pen release IRQ there: timeout in ns following the + * last PENIRQ after which we assume the pen is lifted. + */ +#define SX8650_PENIRQ_TIMEOUT msecs_to_jiffies(10) + #define MAX_12BIT ((1 << 12) - 1) +#define MAX_I2C_READ_LEN 10 /* see datasheet section 5.1.5 */ + +/* channel definition */ +#define CH_X 0x00 +#define CH_Y 0x01 + +struct sx865x_data { + u8 cmd_manual; + u8 chan_mask; + u8 has_irq_penrelease; + u8 has_reg_irqmask; + irq_handler_t irqh; +}; struct sx8654 { struct input_dev *input; struct i2c_client *client; struct gpio_desc *gpio_reset; + + spinlock_t lock; /* for input reporting from irq/timer */ + struct timer_list timer; + + const struct sx865x_data *data; }; +static inline void sx865x_penrelease(struct sx8654 *ts) +{ + struct input_dev *input_dev = ts->input; + + input_report_key(input_dev, BTN_TOUCH, 0); + input_sync(input_dev); +} + +static void sx865x_penrelease_timer_handler(struct timer_list *t) +{ + struct sx8654 *ts = from_timer(ts, t, timer); + unsigned long flags; + + spin_lock_irqsave(&ts->lock, flags); + sx865x_penrelease(ts); + spin_unlock_irqrestore(&ts->lock, flags); + dev_dbg(&ts->client->dev, "penrelease by timer\n"); +} + +static irqreturn_t sx8650_irq(int irq, void *handle) +{ + struct sx8654 *ts = handle; + struct device *dev = &ts->client->dev; + int len, i; + unsigned long flags; + u8 stat; + u16 x, y; + u8 data[MAX_I2C_READ_LEN]; + u16 ch; + u16 chdata; + u8 readlen = hweight32(ts->data->chan_mask) * 2; + + stat = i2c_smbus_read_byte_data(ts->client, CMD_READ_REGISTER + | I2C_REG_SX8650_STAT); + + if (!(stat & SX8650_STAT_CONVIRQ)) { + dev_dbg(dev, "%s ignore stat [0x%02x]", __func__, stat); + return IRQ_HANDLED; + } + + len = i2c_master_recv(ts->client, data, readlen); + if (len != readlen) { + dev_dbg(dev, "ignore short recv (%d)\n", len); + return IRQ_HANDLED; + } + + spin_lock_irqsave(&ts->lock, flags); + + x = 0; + y = 0; + for (i = 0; (i + 1) < len; i++) { + chdata = data[i] << 8; + i++; + chdata += data[i]; + + if (unlikely(chdata == 0xFFFF)) { + dev_dbg(dev, "invalid qualified data @ %d\n", i); + continue; + } else if (unlikely(chdata & 0x8000)) { + dev_warn(dev, "hibit @ %d [0x%04x]\n", i, chdata); + continue; + } + + ch = chdata >> 12; + if (ch == CH_X) + x = chdata & MAX_12BIT; + else if (ch == CH_Y) + y = chdata & MAX_12BIT; + else + dev_warn(dev, "unknown channel %d [0x%04x]\n", ch, + chdata); + } + + input_report_abs(ts->input, ABS_X, x); + input_report_abs(ts->input, ABS_Y, y); + input_report_key(ts->input, BTN_TOUCH, 1); + input_sync(ts->input); + dev_dbg(dev, "point(%4d,%4d)\n", x, y); + + mod_timer(&ts->timer, jiffies + SX8650_PENIRQ_TIMEOUT); + spin_unlock_irqrestore(&ts->lock, flags); + + return IRQ_HANDLED; +} + static irqreturn_t sx8654_irq(int irq, void *handle) { struct sx8654 *sx8654 = handle; @@ -127,6 +238,22 @@ static irqreturn_t sx8654_irq(int irq, void *handle) return IRQ_HANDLED; } +static const struct sx865x_data sx8650_data = { + .cmd_manual = 0xb0, + .has_irq_penrelease = 0, + .has_reg_irqmask = 0, + .chan_mask = (CONV_X | CONV_Y), + .irqh = sx8650_irq, +}; + +static const struct sx865x_data sx8654_data = { + .cmd_manual = 0xc0, + .has_irq_penrelease = 1, + .has_reg_irqmask = 1, + .chan_mask = (CONV_X | CONV_Y), + .irqh = sx8654_irq, +}; + static int sx8654_reset(struct sx8654 *ts) { int err; @@ -182,13 +309,13 @@ static void sx8654_close(struct input_dev *dev) disable_irq(client->irq); /* enable manual mode mode */ - error = i2c_smbus_write_byte(client, CMD_MANUAL); + error = i2c_smbus_write_byte(client, sx8654->data->cmd_manual); if (error) { dev_err(&client->dev, "writing command CMD_MANUAL failed"); return; } - error = i2c_smbus_write_byte_data(client, I2C_REG_TOUCH0, 0); + error = i2c_smbus_write_byte_data(client, I2C_REG_TOUCH0, RATE_MANUAL); if (error) { dev_err(&client->dev, "writing to I2C_REG_TOUCH0 failed"); return; @@ -221,6 +348,20 @@ static int sx8654_probe(struct i2c_client *client, } dev_dbg(&client->dev, "got GPIO reset pin\n"); + sx8654->data = of_device_get_match_data(&client->dev); + if (!sx8654->data) + sx8654->data = (const struct sx865x_data *)id->driver_data; + if (!sx8654->data) { + dev_err(&client->dev, "invalid or missing device data\n"); + return -EINVAL; + } + + if (!sx8654->data->has_irq_penrelease) { + dev_dbg(&client->dev, "use timer for penrelease\n"); + timer_setup(&sx8654->timer, sx865x_penrelease_timer_handler, 0); + spin_lock_init(&sx8654->lock); + } + input = devm_input_allocate_device(&client->dev); if (!input) return -ENOMEM; @@ -248,29 +389,31 @@ static int sx8654_probe(struct i2c_client *client, } error = i2c_smbus_write_byte_data(client, I2C_REG_CHANMASK, - CONV_X | CONV_Y); + sx8654->data->chan_mask); if (error) { dev_err(&client->dev, "writing to I2C_REG_CHANMASK failed"); return error; } - error = i2c_smbus_write_byte_data(client, I2C_REG_IRQMASK, - IRQ_PENTOUCH_TOUCHCONVDONE | - IRQ_PENRELEASE); - if (error) { - dev_err(&client->dev, "writing to I2C_REG_IRQMASK failed"); - return error; + if (sx8654->data->has_reg_irqmask) { + error = i2c_smbus_write_byte_data(client, I2C_REG_IRQMASK, + IRQ_PENTOUCH_TOUCHCONVDONE | + IRQ_PENRELEASE); + if (error) { + dev_err(&client->dev, "writing I2C_REG_IRQMASK failed"); + return error; + } } error = i2c_smbus_write_byte_data(client, I2C_REG_TOUCH1, - CONDIRQ | FILT_7SA); + CONDIRQ | RPDNT_100K | FILT_7SA); if (error) { dev_err(&client->dev, "writing to I2C_REG_TOUCH1 failed"); return error; } error = devm_request_threaded_irq(&client->dev, client->irq, - NULL, sx8654_irq, + NULL, sx8654->data->irqh, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, client->name, sx8654); if (error) { @@ -292,18 +435,28 @@ static int sx8654_probe(struct i2c_client *client, #ifdef CONFIG_OF static const struct of_device_id sx8654_of_match[] = { - { .compatible = "semtech,sx8654", }, - { .compatible = "semtech,sx8655", }, - { .compatible = "semtech,sx8656", }, - { }, + { + .compatible = "semtech,sx8650", + .data = &sx8650_data, + }, { + .compatible = "semtech,sx8654", + .data = &sx8654_data, + }, { + .compatible = "semtech,sx8655", + .data = &sx8654_data, + }, { + .compatible = "semtech,sx8656", + .data = &sx8654_data, + }, {}, }; MODULE_DEVICE_TABLE(of, sx8654_of_match); #endif static const struct i2c_device_id sx8654_id_table[] = { - { "semtech_sx8654", 0 }, - { "semtech_sx8655", 0 }, - { "semtech_sx8656", 0 }, + { .name = "semtech_sx8650", .driver_data = (long)&sx8650_data }, + { .name = "semtech_sx8654", .driver_data = (long)&sx8654_data }, + { .name = "semtech_sx8655", .driver_data = (long)&sx8654_data }, + { .name = "semtech_sx8656", .driver_data = (long)&sx8654_data }, { }, }; MODULE_DEVICE_TABLE(i2c, sx8654_id_table);