diff options
Diffstat (limited to 'drivers/input/mouse/navpoint.c')
| -rw-r--r-- | drivers/input/mouse/navpoint.c | 350 |
1 files changed, 0 insertions, 350 deletions
diff --git a/drivers/input/mouse/navpoint.c b/drivers/input/mouse/navpoint.c deleted file mode 100644 index ba757783c258aa..00000000000000 --- a/drivers/input/mouse/navpoint.c +++ /dev/null @@ -1,350 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Synaptics NavPoint (PXA27x SSP/SPI) driver. - * - * Copyright (C) 2012 Paul Parsons <lost.distance@yahoo.com> - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/clk.h> -#include <linux/delay.h> -#include <linux/gpio/consumer.h> -#include <linux/input.h> -#include <linux/input/navpoint.h> -#include <linux/interrupt.h> -#include <linux/mutex.h> -#include <linux/pxa2xx_ssp.h> -#include <linux/slab.h> - -/* - * Synaptics Modular Embedded Protocol: Module Packet Format. - * Module header byte 2:0 = Length (# bytes that follow) - * Module header byte 4:3 = Control - * Module header byte 7:5 = Module Address - */ -#define HEADER_LENGTH(byte) ((byte) & 0x07) -#define HEADER_CONTROL(byte) (((byte) >> 3) & 0x03) -#define HEADER_ADDRESS(byte) ((byte) >> 5) - -struct navpoint { - struct ssp_device *ssp; - struct input_dev *input; - struct device *dev; - struct gpio_desc *gpiod; - int index; - u8 data[1 + HEADER_LENGTH(0xff)]; -}; - -/* - * Initialization values for SSCR0_x, SSCR1_x, SSSR_x. - */ -static const u32 sscr0 = 0 - | SSCR0_TUM /* TIM = 1; No TUR interrupts */ - | SSCR0_RIM /* RIM = 1; No ROR interrupts */ - | SSCR0_SSE /* SSE = 1; SSP enabled */ - | SSCR0_Motorola /* FRF = 0; Motorola SPI */ - | SSCR0_DataSize(16) /* DSS = 15; Data size = 16-bit */ - ; -static const u32 sscr1 = 0 - | SSCR1_SCFR /* SCFR = 1; SSPSCLK only during transfers */ - | SSCR1_SCLKDIR /* SCLKDIR = 1; Slave mode */ - | SSCR1_SFRMDIR /* SFRMDIR = 1; Slave mode */ - | SSCR1_RWOT /* RWOT = 1; Receive without transmit mode */ - | SSCR1_RxTresh(1) /* RFT = 0; Receive FIFO threshold = 1 */ - | SSCR1_SPH /* SPH = 1; SSPSCLK inactive 0.5 + 1 cycles */ - | SSCR1_RIE /* RIE = 1; Receive FIFO interrupt enabled */ - ; -static const u32 sssr = 0 - | SSSR_BCE /* BCE = 1; Clear BCE */ - | SSSR_TUR /* TUR = 1; Clear TUR */ - | SSSR_EOC /* EOC = 1; Clear EOC */ - | SSSR_TINT /* TINT = 1; Clear TINT */ - | SSSR_PINT /* PINT = 1; Clear PINT */ - | SSSR_ROR /* ROR = 1; Clear ROR */ - ; - -/* - * MEP Query $22: Touchpad Coordinate Range Query is not supported by - * the NavPoint module, so sampled values provide the default limits. - */ -#define NAVPOINT_X_MIN 1278 -#define NAVPOINT_X_MAX 5340 -#define NAVPOINT_Y_MIN 1572 -#define NAVPOINT_Y_MAX 4396 -#define NAVPOINT_PRESSURE_MIN 0 -#define NAVPOINT_PRESSURE_MAX 255 - -static void navpoint_packet(struct navpoint *navpoint) -{ - int finger; - int gesture; - int x, y, z; - - switch (navpoint->data[0]) { - case 0xff: /* Garbage (packet?) between reset and Hello packet */ - case 0x00: /* Module 0, NULL packet */ - break; - - case 0x0e: /* Module 0, Absolute packet */ - finger = (navpoint->data[1] & 0x01); - gesture = (navpoint->data[1] & 0x02); - x = ((navpoint->data[2] & 0x1f) << 8) | navpoint->data[3]; - y = ((navpoint->data[4] & 0x1f) << 8) | navpoint->data[5]; - z = navpoint->data[6]; - input_report_key(navpoint->input, BTN_TOUCH, finger); - input_report_abs(navpoint->input, ABS_X, x); - input_report_abs(navpoint->input, ABS_Y, y); - input_report_abs(navpoint->input, ABS_PRESSURE, z); - input_report_key(navpoint->input, BTN_TOOL_FINGER, finger); - input_report_key(navpoint->input, BTN_LEFT, gesture); - input_sync(navpoint->input); - break; - - case 0x19: /* Module 0, Hello packet */ - if ((navpoint->data[1] & 0xf0) == 0x10) - break; - fallthrough; - default: - dev_warn(navpoint->dev, - "spurious packet: data=0x%02x,0x%02x,...\n", - navpoint->data[0], navpoint->data[1]); - break; - } -} - -static irqreturn_t navpoint_irq(int irq, void *dev_id) -{ - struct navpoint *navpoint = dev_id; - struct ssp_device *ssp = navpoint->ssp; - irqreturn_t ret = IRQ_NONE; - u32 status; - - status = pxa_ssp_read_reg(ssp, SSSR); - if (status & sssr) { - dev_warn(navpoint->dev, - "unexpected interrupt: status=0x%08x\n", status); - pxa_ssp_write_reg(ssp, SSSR, (status & sssr)); - ret = IRQ_HANDLED; - } - - while (status & SSSR_RNE) { - u32 data; - - data = pxa_ssp_read_reg(ssp, SSDR); - navpoint->data[navpoint->index + 0] = (data >> 8); - navpoint->data[navpoint->index + 1] = data; - navpoint->index += 2; - if (HEADER_LENGTH(navpoint->data[0]) < navpoint->index) { - navpoint_packet(navpoint); - navpoint->index = 0; - } - status = pxa_ssp_read_reg(ssp, SSSR); - ret = IRQ_HANDLED; - } - - return ret; -} - -static void navpoint_up(struct navpoint *navpoint) -{ - struct ssp_device *ssp = navpoint->ssp; - int timeout; - - clk_prepare_enable(ssp->clk); - - pxa_ssp_write_reg(ssp, SSCR1, sscr1); - pxa_ssp_write_reg(ssp, SSSR, sssr); - pxa_ssp_write_reg(ssp, SSTO, 0); - pxa_ssp_write_reg(ssp, SSCR0, sscr0); /* SSCR0_SSE written last */ - - /* Wait until SSP port is ready for slave clock operations */ - for (timeout = 100; timeout != 0; --timeout) { - if (!(pxa_ssp_read_reg(ssp, SSSR) & SSSR_CSS)) - break; - msleep(1); - } - - if (timeout == 0) - dev_err(navpoint->dev, - "timeout waiting for SSSR[CSS] to clear\n"); - - gpiod_set_value(navpoint->gpiod, 1); -} - -static void navpoint_down(struct navpoint *navpoint) -{ - struct ssp_device *ssp = navpoint->ssp; - - gpiod_set_value(navpoint->gpiod, 0); - - pxa_ssp_write_reg(ssp, SSCR0, 0); - - clk_disable_unprepare(ssp->clk); -} - -static int navpoint_open(struct input_dev *input) -{ - struct navpoint *navpoint = input_get_drvdata(input); - - navpoint_up(navpoint); - - return 0; -} - -static void navpoint_close(struct input_dev *input) -{ - struct navpoint *navpoint = input_get_drvdata(input); - - navpoint_down(navpoint); -} - -static int navpoint_probe(struct platform_device *pdev) -{ - const struct navpoint_platform_data *pdata = - dev_get_platdata(&pdev->dev); - struct ssp_device *ssp; - struct input_dev *input; - struct navpoint *navpoint; - int error; - - if (!pdata) { - dev_err(&pdev->dev, "no platform data\n"); - return -EINVAL; - } - - ssp = pxa_ssp_request(pdata->port, pdev->name); - if (!ssp) - return -ENODEV; - - /* HaRET does not disable devices before jumping into Linux */ - if (pxa_ssp_read_reg(ssp, SSCR0) & SSCR0_SSE) { - pxa_ssp_write_reg(ssp, SSCR0, 0); - dev_warn(&pdev->dev, "ssp%d already enabled\n", pdata->port); - } - - navpoint = kzalloc(sizeof(*navpoint), GFP_KERNEL); - input = input_allocate_device(); - if (!navpoint || !input) { - error = -ENOMEM; - goto err_free_mem; - } - - navpoint->gpiod = gpiod_get_optional(&pdev->dev, - NULL, GPIOD_OUT_LOW); - if (IS_ERR(navpoint->gpiod)) { - error = PTR_ERR(navpoint->gpiod); - dev_err(&pdev->dev, "error getting GPIO\n"); - goto err_free_mem; - } - gpiod_set_consumer_name(navpoint->gpiod, "SYNAPTICS_ON"); - - navpoint->ssp = ssp; - navpoint->input = input; - navpoint->dev = &pdev->dev; - - input->name = pdev->name; - input->dev.parent = &pdev->dev; - - __set_bit(EV_KEY, input->evbit); - __set_bit(EV_ABS, input->evbit); - __set_bit(BTN_LEFT, input->keybit); - __set_bit(BTN_TOUCH, input->keybit); - __set_bit(BTN_TOOL_FINGER, input->keybit); - - input_set_abs_params(input, ABS_X, - NAVPOINT_X_MIN, NAVPOINT_X_MAX, 0, 0); - input_set_abs_params(input, ABS_Y, - NAVPOINT_Y_MIN, NAVPOINT_Y_MAX, 0, 0); - input_set_abs_params(input, ABS_PRESSURE, - NAVPOINT_PRESSURE_MIN, NAVPOINT_PRESSURE_MAX, - 0, 0); - - input->open = navpoint_open; - input->close = navpoint_close; - - input_set_drvdata(input, navpoint); - - error = request_irq(ssp->irq, navpoint_irq, 0, pdev->name, navpoint); - if (error) - goto err_free_mem; - - error = input_register_device(input); - if (error) - goto err_free_irq; - - platform_set_drvdata(pdev, navpoint); - dev_dbg(&pdev->dev, "ssp%d, irq %d\n", pdata->port, ssp->irq); - - return 0; - -err_free_irq: - free_irq(ssp->irq, navpoint); -err_free_mem: - input_free_device(input); - kfree(navpoint); - pxa_ssp_free(ssp); - - return error; -} - -static void navpoint_remove(struct platform_device *pdev) -{ - struct navpoint *navpoint = platform_get_drvdata(pdev); - struct ssp_device *ssp = navpoint->ssp; - - free_irq(ssp->irq, navpoint); - - input_unregister_device(navpoint->input); - kfree(navpoint); - - pxa_ssp_free(ssp); -} - -static int navpoint_suspend(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct navpoint *navpoint = platform_get_drvdata(pdev); - struct input_dev *input = navpoint->input; - - mutex_lock(&input->mutex); - if (input_device_enabled(input)) - navpoint_down(navpoint); - mutex_unlock(&input->mutex); - - return 0; -} - -static int navpoint_resume(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct navpoint *navpoint = platform_get_drvdata(pdev); - struct input_dev *input = navpoint->input; - - mutex_lock(&input->mutex); - if (input_device_enabled(input)) - navpoint_up(navpoint); - mutex_unlock(&input->mutex); - - return 0; -} - -static DEFINE_SIMPLE_DEV_PM_OPS(navpoint_pm_ops, - navpoint_suspend, navpoint_resume); - -static struct platform_driver navpoint_driver = { - .probe = navpoint_probe, - .remove_new = navpoint_remove, - .driver = { - .name = "navpoint", - .pm = pm_sleep_ptr(&navpoint_pm_ops), - }, -}; - -module_platform_driver(navpoint_driver); - -MODULE_AUTHOR("Paul Parsons <lost.distance@yahoo.com>"); -MODULE_DESCRIPTION("Synaptics NavPoint (PXA27x SSP/SPI) driver"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:navpoint"); |