Input: synaptics-rmi4 - add support for F03
This adds basic functionality for PS/2 passthrough on Synaptics Touchpads using RMI4 through smbus. Reviewed-by: Andrew Duggan <aduggan@synaptics.com> Signed-off-by: Lyude Paul <thatslyude@gmail.com> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Lyude Paul
Dmitry Torokhov
Родитель
0a135b88bc
Коммит
c5e8848fc9
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@ -39,6 +39,15 @@ config RMI4_SMB
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To compile this driver as a module, choose M here: the module will be
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called rmi_smbus.
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config RMI4_F03
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bool "RMI4 Function 03 (PS2 Guest)"
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depends on RMI4_CORE && SERIO
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help
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Say Y here if you want to add support for RMI4 function 03.
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Function 03 provides PS2 guest support for RMI4 devices. This
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includes support for TrackPoints on TouchPads.
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config RMI4_2D_SENSOR
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bool
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depends on RMI4_CORE
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@ -4,6 +4,7 @@ rmi_core-y := rmi_bus.o rmi_driver.o rmi_f01.o
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rmi_core-$(CONFIG_RMI4_2D_SENSOR) += rmi_2d_sensor.o
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# Function drivers
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rmi_core-$(CONFIG_RMI4_F03) += rmi_f03.o
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rmi_core-$(CONFIG_RMI4_F11) += rmi_f11.o
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rmi_core-$(CONFIG_RMI4_F12) += rmi_f12.o
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rmi_core-$(CONFIG_RMI4_F30) += rmi_f30.o
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@ -306,6 +306,9 @@ struct bus_type rmi_bus_type = {
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static struct rmi_function_handler *fn_handlers[] = {
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&rmi_f01_handler,
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#ifdef CONFIG_RMI4_F03
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&rmi_f03_handler,
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#endif
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#ifdef CONFIG_RMI4_F11
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&rmi_f11_handler,
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#endif
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@ -121,6 +121,7 @@ static inline void rmi_f34_remove_sysfs(struct rmi_device *rmi_dev)
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#endif /* CONFIG_RMI_F34 */
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extern struct rmi_function_handler rmi_f01_handler;
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extern struct rmi_function_handler rmi_f03_handler;
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extern struct rmi_function_handler rmi_f11_handler;
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extern struct rmi_function_handler rmi_f12_handler;
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extern struct rmi_function_handler rmi_f30_handler;
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@ -0,0 +1,232 @@
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/*
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* Copyright (C) 2015-2016 Red Hat
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* Copyright (C) 2015 Lyude Paul <thatslyude@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/serio.h>
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#include <linux/notifier.h>
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#include "rmi_driver.h"
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#define RMI_F03_RX_DATA_OFB 0x01
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#define RMI_F03_OB_SIZE 2
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#define RMI_F03_OB_OFFSET 2
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#define RMI_F03_OB_DATA_OFFSET 1
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#define RMI_F03_OB_FLAG_TIMEOUT BIT(6)
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#define RMI_F03_OB_FLAG_PARITY BIT(7)
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#define RMI_F03_DEVICE_COUNT 0x07
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#define RMI_F03_BYTES_PER_DEVICE 0x07
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#define RMI_F03_BYTES_PER_DEVICE_SHIFT 4
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#define RMI_F03_QUEUE_LENGTH 0x0F
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struct f03_data {
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struct rmi_function *fn;
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struct serio *serio;
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u8 device_count;
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u8 rx_queue_length;
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};
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static int rmi_f03_pt_write(struct serio *id, unsigned char val)
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{
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struct f03_data *f03 = id->port_data;
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int error;
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rmi_dbg(RMI_DEBUG_FN, &f03->fn->dev,
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"%s: Wrote %.2hhx to PS/2 passthrough address",
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__func__, val);
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error = rmi_write(f03->fn->rmi_dev, f03->fn->fd.data_base_addr, val);
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if (error) {
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dev_err(&f03->fn->dev,
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"%s: Failed to write to F03 TX register (%d).\n",
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__func__, error);
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return error;
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}
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return 0;
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}
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static int rmi_f03_initialize(struct f03_data *f03)
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{
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struct rmi_function *fn = f03->fn;
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struct device *dev = &fn->dev;
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int error;
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u8 bytes_per_device;
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u8 query1;
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u8 query2[RMI_F03_DEVICE_COUNT * RMI_F03_BYTES_PER_DEVICE];
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size_t query2_len;
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error = rmi_read(fn->rmi_dev, fn->fd.query_base_addr, &query1);
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if (error) {
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dev_err(dev, "Failed to read query register (%d).\n", error);
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return error;
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}
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f03->device_count = query1 & RMI_F03_DEVICE_COUNT;
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bytes_per_device = (query1 >> RMI_F03_BYTES_PER_DEVICE_SHIFT) &
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RMI_F03_BYTES_PER_DEVICE;
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query2_len = f03->device_count * bytes_per_device;
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/*
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* The first generation of image sensors don't have a second part to
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* their f03 query, as such we have to set some of these values manually
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*/
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if (query2_len < 1) {
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f03->device_count = 1;
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f03->rx_queue_length = 7;
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} else {
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error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr + 1,
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query2, query2_len);
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if (error) {
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dev_err(dev,
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"Failed to read second set of query registers (%d).\n",
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error);
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return error;
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}
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f03->rx_queue_length = query2[0] & RMI_F03_QUEUE_LENGTH;
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}
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return 0;
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}
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static int rmi_f03_register_pt(struct f03_data *f03)
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{
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struct serio *serio;
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serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
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if (!serio)
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return -ENOMEM;
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serio->id.type = SERIO_8042;
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serio->write = rmi_f03_pt_write;
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serio->port_data = f03;
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strlcpy(serio->name, "Synaptics RMI4 PS/2 pass-through",
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sizeof(serio->name));
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strlcpy(serio->phys, "synaptics-rmi4-pt/serio1",
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sizeof(serio->phys));
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serio->dev.parent = &f03->fn->dev;
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f03->serio = serio;
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serio_register_port(serio);
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return 0;
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}
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static int rmi_f03_probe(struct rmi_function *fn)
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{
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struct device *dev = &fn->dev;
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struct f03_data *f03;
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int error;
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f03 = devm_kzalloc(dev, sizeof(struct f03_data), GFP_KERNEL);
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if (!f03)
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return -ENOMEM;
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f03->fn = fn;
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error = rmi_f03_initialize(f03);
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if (error < 0)
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return error;
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if (f03->device_count != 1)
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dev_warn(dev, "found %d devices on PS/2 passthrough",
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f03->device_count);
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dev_set_drvdata(dev, f03);
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error = rmi_f03_register_pt(f03);
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if (error)
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return error;
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return 0;
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}
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static int rmi_f03_config(struct rmi_function *fn)
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{
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fn->rmi_dev->driver->set_irq_bits(fn->rmi_dev, fn->irq_mask);
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return 0;
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}
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static int rmi_f03_attention(struct rmi_function *fn, unsigned long *irq_bits)
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{
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struct f03_data *f03 = dev_get_drvdata(&fn->dev);
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u16 data_addr = fn->fd.data_base_addr;
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const u8 ob_len = f03->rx_queue_length * RMI_F03_OB_SIZE;
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u8 obs[RMI_F03_QUEUE_LENGTH * RMI_F03_OB_SIZE];
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u8 ob_status;
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u8 ob_data;
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unsigned int serio_flags;
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int i;
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int error;
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/* Grab all of the data registers, and check them for data */
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error = rmi_read_block(fn->rmi_dev, data_addr + RMI_F03_OB_OFFSET,
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&obs, ob_len);
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if (error) {
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dev_err(&fn->dev,
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"%s: Failed to read F03 output buffers: %d\n",
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__func__, error);
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serio_interrupt(f03->serio, 0, SERIO_TIMEOUT);
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return error;
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}
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for (i = 0; i < ob_len; i += RMI_F03_OB_SIZE) {
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ob_status = obs[i];
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ob_data = obs[i + RMI_F03_OB_DATA_OFFSET];
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serio_flags = 0;
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if (!(ob_status & RMI_F03_RX_DATA_OFB))
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continue;
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if (ob_status & RMI_F03_OB_FLAG_TIMEOUT)
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serio_flags |= SERIO_TIMEOUT;
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if (ob_status & RMI_F03_OB_FLAG_PARITY)
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serio_flags |= SERIO_PARITY;
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rmi_dbg(RMI_DEBUG_FN, &fn->dev,
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"%s: Received %.2hhx from PS2 guest T: %c P: %c\n",
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__func__, ob_data,
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serio_flags & SERIO_TIMEOUT ? 'Y' : 'N',
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serio_flags & SERIO_PARITY ? 'Y' : 'N');
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serio_interrupt(f03->serio, ob_data, serio_flags);
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}
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return 0;
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}
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static void rmi_f03_remove(struct rmi_function *fn)
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{
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struct f03_data *f03 = dev_get_drvdata(&fn->dev);
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serio_unregister_port(f03->serio);
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}
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struct rmi_function_handler rmi_f03_handler = {
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.driver = {
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.name = "rmi4_f03",
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},
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.func = 0x03,
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.probe = rmi_f03_probe,
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.config = rmi_f03_config,
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.attention = rmi_f03_attention,
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.remove = rmi_f03_remove,
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};
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MODULE_AUTHOR("Lyude Paul <thatslyude@gmail.com>");
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MODULE_DESCRIPTION("RMI F03 module");
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MODULE_LICENSE("GPL");
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