| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Sébastien Szymanski | 1077 | 50.33% | 1 | 11.11% |
| Richard Leitner | 1059 | 49.49% | 5 | 55.56% |
| Thomas Gleixner | 2 | 0.09% | 1 | 11.11% |
| Dmitry Torokhov | 1 | 0.05% | 1 | 11.11% |
| Dan Carpenter | 1 | 0.05% | 1 | 11.11% |
| Total | 2140 | 9 |
// SPDX-License-Identifier: GPL-2.0-only /* * Driver for Semtech SX8654 I2C touchscreen controller. * * Copyright (c) 2015 Armadeus Systems * Sébastien Szymanski <sebastien.szymanski@armadeus.com> * * Using code from: * - sx865x.c * Copyright (c) 2013 U-MoBo Srl * Pierluigi Passaro <p.passaro@u-mobo.com> * - sx8650.c * Copyright (c) 2009 Wayne Roberts * - tsc2007.c * Copyright (c) 2008 Kwangwoo Lee * - ads7846.c * Copyright (c) 2005 David Brownell * Copyright (c) 2006 Nokia Corporation * - corgi_ts.c * Copyright (C) 2004-2005 Richard Purdie * - omap_ts.[hc], ads7846.h, ts_osk.c * Copyright (C) 2002 MontaVista Software * Copyright (C) 2004 Texas Instruments * Copyright (C) 2005 Dirk Behme */ #include <linux/bitops.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/input/touchscreen.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/module.h> #include <linux/of.h> /* register addresses */ #define I2C_REG_TOUCH0 0x00 #define I2C_REG_TOUCH1 0x01 #define I2C_REG_CHANMASK 0x04 #define I2C_REG_IRQMASK 0x22 #define I2C_REG_IRQSRC 0x23 #define I2C_REG_SOFTRESET 0x3f #define I2C_REG_SX8650_STAT 0x05 #define SX8650_STAT_CONVIRQ BIT(7) /* commands */ #define CMD_READ_REGISTER 0x40 #define CMD_PENTRG 0xe0 /* value for I2C_REG_SOFTRESET */ #define SOFTRESET_VALUE 0xde /* bits for I2C_REG_IRQSRC */ #define IRQ_PENTOUCH_TOUCHCONVDONE BIT(3) #define IRQ_PENRELEASE BIT(2) /* bits for RegTouch1 */ #define CONDIRQ 0x20 #define RPDNT_100K 0x00 #define FILT_7SA 0x03 /* bits for I2C_REG_CHANMASK */ #define CONV_X BIT(7) #define CONV_Y BIT(6) /* coordinates rate: higher nibble of CTRL0 register */ #define RATE_MANUAL 0x00 #define RATE_5000CPS 0xf0 /* 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; bool has_irq_penrelease; bool 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; struct touchscreen_properties props; 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; u16 ch; u16 chdata; __be16 data[MAX_I2C_READ_LEN / sizeof(__be16)]; u8 nchan = hweight32(ts->data->chan_mask); u8 readlen = nchan * sizeof(*data); 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, (u8 *)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 < nchan; i++) { chdata = be16_to_cpu(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); } touchscreen_report_pos(ts->input, &ts->props, x, y, false); 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; int irqsrc; u8 data[4]; unsigned int x, y; int retval; irqsrc = i2c_smbus_read_byte_data(sx8654->client, CMD_READ_REGISTER | I2C_REG_IRQSRC); dev_dbg(&sx8654->client->dev, "irqsrc = 0x%x", irqsrc); if (irqsrc < 0) goto out; if (irqsrc & IRQ_PENRELEASE) { dev_dbg(&sx8654->client->dev, "pen release interrupt"); input_report_key(sx8654->input, BTN_TOUCH, 0); input_sync(sx8654->input); } if (irqsrc & IRQ_PENTOUCH_TOUCHCONVDONE) { dev_dbg(&sx8654->client->dev, "pen touch interrupt"); retval = i2c_master_recv(sx8654->client, data, sizeof(data)); if (retval != sizeof(data)) goto out; /* invalid data */ if (unlikely(data[0] & 0x80 || data[2] & 0x80)) goto out; x = ((data[0] & 0xf) << 8) | (data[1]); y = ((data[2] & 0xf) << 8) | (data[3]); touchscreen_report_pos(sx8654->input, &sx8654->props, x, y, false); input_report_key(sx8654->input, BTN_TOUCH, 1); input_sync(sx8654->input); dev_dbg(&sx8654->client->dev, "point(%4d,%4d)\n", x, y); } out: return IRQ_HANDLED; } static int sx8654_reset(struct sx8654 *ts) { int err; if (ts->gpio_reset) { gpiod_set_value_cansleep(ts->gpio_reset, 1); udelay(2); /* Tpulse > 1µs */ gpiod_set_value_cansleep(ts->gpio_reset, 0); } else { dev_dbg(&ts->client->dev, "NRST unavailable, try softreset\n"); err = i2c_smbus_write_byte_data(ts->client, I2C_REG_SOFTRESET, SOFTRESET_VALUE); if (err) return err; } return 0; } static int sx8654_open(struct input_dev *dev) { struct sx8654 *sx8654 = input_get_drvdata(dev); struct i2c_client *client = sx8654->client; int error; /* enable pen trigger mode */ error = i2c_smbus_write_byte_data(client, I2C_REG_TOUCH0, RATE_5000CPS | POWDLY_1_1MS); if (error) { dev_err(&client->dev, "writing to I2C_REG_TOUCH0 failed"); return error; } error = i2c_smbus_write_byte(client, CMD_PENTRG); if (error) { dev_err(&client->dev, "writing command CMD_PENTRG failed"); return error; } enable_irq(client->irq); return 0; } static void sx8654_close(struct input_dev *dev) { struct sx8654 *sx8654 = input_get_drvdata(dev); struct i2c_client *client = sx8654->client; int error; disable_irq(client->irq); if (!sx8654->data->has_irq_penrelease) del_timer_sync(&sx8654->timer); /* enable manual mode mode */ 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, RATE_MANUAL); if (error) { dev_err(&client->dev, "writing to I2C_REG_TOUCH0 failed"); return; } } static int sx8654_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct sx8654 *sx8654; struct input_dev *input; int error; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_WORD_DATA)) return -ENXIO; sx8654 = devm_kzalloc(&client->dev, sizeof(*sx8654), GFP_KERNEL); if (!sx8654) return -ENOMEM; sx8654->gpio_reset = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(sx8654->gpio_reset)) { error = PTR_ERR(sx8654->gpio_reset); if (error != -EPROBE_DEFER) dev_err(&client->dev, "unable to get reset-gpio: %d\n", error); return error; } dev_dbg(&client->dev, "got GPIO reset pin\n"); sx8654->data = 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; input->name = "SX8654 I2C Touchscreen"; input->id.bustype = BUS_I2C; input->dev.parent = &client->dev; input->open = sx8654_open; input->close = sx8654_close; __set_bit(INPUT_PROP_DIRECT, input->propbit); input_set_capability(input, EV_KEY, BTN_TOUCH); input_set_abs_params(input, ABS_X, 0, MAX_12BIT, 0, 0); input_set_abs_params(input, ABS_Y, 0, MAX_12BIT, 0, 0); touchscreen_parse_properties(input, false, &sx8654->props); sx8654->client = client; sx8654->input = input; input_set_drvdata(sx8654->input, sx8654); error = sx8654_reset(sx8654); if (error) { dev_err(&client->dev, "reset failed"); return error; } error = i2c_smbus_write_byte_data(client, I2C_REG_CHANMASK, sx8654->data->chan_mask); if (error) { dev_err(&client->dev, "writing to I2C_REG_CHANMASK 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 | 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->data->irqh, IRQF_ONESHOT, client->name, sx8654); if (error) { dev_err(&client->dev, "Failed to enable IRQ %d, error: %d\n", client->irq, error); return error; } /* Disable the IRQ, we'll enable it in sx8654_open() */ disable_irq(client->irq); error = input_register_device(sx8654->input); if (error) return error; return 0; } static const struct sx865x_data sx8650_data = { .cmd_manual = 0xb0, .has_irq_penrelease = false, .has_reg_irqmask = false, .chan_mask = (CONV_X | CONV_Y), .irqh = sx8650_irq, }; static const struct sx865x_data sx8654_data = { .cmd_manual = 0xc0, .has_irq_penrelease = true, .has_reg_irqmask = true, .chan_mask = (CONV_X | CONV_Y), .irqh = sx8654_irq, }; #ifdef CONFIG_OF static const struct of_device_id sx8654_of_match[] = { { .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[] = { { .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); static struct i2c_driver sx8654_driver = { .driver = { .name = "sx8654", .of_match_table = of_match_ptr(sx8654_of_match), }, .id_table = sx8654_id_table, .probe = sx8654_probe, }; module_i2c_driver(sx8654_driver); MODULE_AUTHOR("Sébastien Szymanski <sebastien.szymanski@armadeus.com>"); MODULE_DESCRIPTION("Semtech SX8654 I2C Touchscreen Driver"); MODULE_LICENSE("GPL");
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