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![Nick Dyer](/assets/img/avatar_default.png)
Convert the RMI driver to use the standard mechanism for distributing IRQs to the various functions. Tested on: * S7300 (F11, F34, F54) * S7817 (F12, F34, F54) Signed-off-by: Nick Dyer <nick@shmanahar.org> Acked-by: Christopher Heiny <cheiny@synaptics.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
408 lines
11 KiB
C
408 lines
11 KiB
C
/*
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* Copyright (c) 2012-2016 Synaptics Incorporated
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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/rmi.h>
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#include <linux/input.h>
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#include <linux/slab.h>
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#include "rmi_driver.h"
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#define RMI_F30_QUERY_SIZE 2
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/* Defs for Query 0 */
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#define RMI_F30_EXTENDED_PATTERNS 0x01
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#define RMI_F30_HAS_MAPPABLE_BUTTONS BIT(1)
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#define RMI_F30_HAS_LED BIT(2)
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#define RMI_F30_HAS_GPIO BIT(3)
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#define RMI_F30_HAS_HAPTIC BIT(4)
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#define RMI_F30_HAS_GPIO_DRV_CTL BIT(5)
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#define RMI_F30_HAS_MECH_MOUSE_BTNS BIT(6)
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/* Defs for Query 1 */
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#define RMI_F30_GPIO_LED_COUNT 0x1F
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/* Defs for Control Registers */
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#define RMI_F30_CTRL_1_GPIO_DEBOUNCE 0x01
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#define RMI_F30_CTRL_1_HALT BIT(4)
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#define RMI_F30_CTRL_1_HALTED BIT(5)
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#define RMI_F30_CTRL_10_NUM_MECH_MOUSE_BTNS 0x03
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#define RMI_F30_CTRL_MAX_REGS 32
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#define RMI_F30_CTRL_MAX_BYTES DIV_ROUND_UP(RMI_F30_CTRL_MAX_REGS, 8)
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#define RMI_F30_CTRL_MAX_REG_BLOCKS 11
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#define RMI_F30_CTRL_REGS_MAX_SIZE (RMI_F30_CTRL_MAX_BYTES \
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+ 1 \
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+ RMI_F30_CTRL_MAX_BYTES \
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+ RMI_F30_CTRL_MAX_BYTES \
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+ RMI_F30_CTRL_MAX_BYTES \
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+ 6 \
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+ RMI_F30_CTRL_MAX_REGS \
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+ RMI_F30_CTRL_MAX_REGS \
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+ RMI_F30_CTRL_MAX_BYTES \
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+ 1 \
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+ 1)
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#define TRACKSTICK_RANGE_START 3
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#define TRACKSTICK_RANGE_END 6
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struct rmi_f30_ctrl_data {
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int address;
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int length;
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u8 *regs;
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};
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struct f30_data {
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/* Query Data */
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bool has_extended_pattern;
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bool has_mappable_buttons;
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bool has_led;
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bool has_gpio;
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bool has_haptic;
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bool has_gpio_driver_control;
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bool has_mech_mouse_btns;
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u8 gpioled_count;
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u8 register_count;
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/* Control Register Data */
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struct rmi_f30_ctrl_data ctrl[RMI_F30_CTRL_MAX_REG_BLOCKS];
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u8 ctrl_regs[RMI_F30_CTRL_REGS_MAX_SIZE];
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u32 ctrl_regs_size;
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u8 data_regs[RMI_F30_CTRL_MAX_BYTES];
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u16 *gpioled_key_map;
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struct input_dev *input;
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struct rmi_function *f03;
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bool trackstick_buttons;
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};
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static int rmi_f30_read_control_parameters(struct rmi_function *fn,
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struct f30_data *f30)
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{
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int error;
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error = rmi_read_block(fn->rmi_dev, fn->fd.control_base_addr,
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f30->ctrl_regs, f30->ctrl_regs_size);
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if (error) {
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dev_err(&fn->dev,
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"%s: Could not read control registers at 0x%x: %d\n",
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__func__, fn->fd.control_base_addr, 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 void rmi_f30_report_button(struct rmi_function *fn,
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struct f30_data *f30, unsigned int button)
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{
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unsigned int reg_num = button >> 3;
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unsigned int bit_num = button & 0x07;
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u16 key_code = f30->gpioled_key_map[button];
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bool key_down = !(f30->data_regs[reg_num] & BIT(bit_num));
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if (f30->trackstick_buttons &&
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button >= TRACKSTICK_RANGE_START &&
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button <= TRACKSTICK_RANGE_END) {
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rmi_f03_overwrite_button(f30->f03, key_code, key_down);
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} else {
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rmi_dbg(RMI_DEBUG_FN, &fn->dev,
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"%s: call input report key (0x%04x) value (0x%02x)",
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__func__, key_code, key_down);
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input_report_key(f30->input, key_code, key_down);
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}
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}
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static irqreturn_t rmi_f30_attention(int irq, void *ctx)
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{
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struct rmi_function *fn = ctx;
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struct f30_data *f30 = dev_get_drvdata(&fn->dev);
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struct rmi_driver_data *drvdata = dev_get_drvdata(&fn->rmi_dev->dev);
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int error;
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int i;
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/* Read the gpi led data. */
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if (drvdata->attn_data.data) {
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if (drvdata->attn_data.size < f30->register_count) {
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dev_warn(&fn->dev,
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"F30 interrupted, but data is missing\n");
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return IRQ_HANDLED;
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}
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memcpy(f30->data_regs, drvdata->attn_data.data,
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f30->register_count);
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drvdata->attn_data.data += f30->register_count;
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drvdata->attn_data.size -= f30->register_count;
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} else {
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error = rmi_read_block(fn->rmi_dev, fn->fd.data_base_addr,
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f30->data_regs, f30->register_count);
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if (error) {
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dev_err(&fn->dev,
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"%s: Failed to read F30 data registers: %d\n",
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__func__, error);
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return IRQ_RETVAL(error);
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}
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}
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if (f30->has_gpio) {
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for (i = 0; i < f30->gpioled_count; i++)
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if (f30->gpioled_key_map[i] != KEY_RESERVED)
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rmi_f30_report_button(fn, f30, i);
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if (f30->trackstick_buttons)
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rmi_f03_commit_buttons(f30->f03);
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}
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return IRQ_HANDLED;
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}
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static int rmi_f30_config(struct rmi_function *fn)
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{
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struct f30_data *f30 = dev_get_drvdata(&fn->dev);
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struct rmi_driver *drv = fn->rmi_dev->driver;
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const struct rmi_device_platform_data *pdata =
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rmi_get_platform_data(fn->rmi_dev);
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int error;
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/* can happen if f30_data.disable is set */
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if (!f30)
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return 0;
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if (pdata->f30_data.trackstick_buttons) {
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/* Try [re-]establish link to F03. */
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f30->f03 = rmi_find_function(fn->rmi_dev, 0x03);
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f30->trackstick_buttons = f30->f03 != NULL;
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}
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if (pdata->f30_data.disable) {
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drv->clear_irq_bits(fn->rmi_dev, fn->irq_mask);
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} else {
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/* Write Control Register values back to device */
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error = rmi_write_block(fn->rmi_dev, fn->fd.control_base_addr,
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f30->ctrl_regs, f30->ctrl_regs_size);
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if (error) {
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dev_err(&fn->dev,
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"%s: Could not write control registers at 0x%x: %d\n",
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__func__, fn->fd.control_base_addr, error);
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return error;
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}
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drv->set_irq_bits(fn->rmi_dev, fn->irq_mask);
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}
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return 0;
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}
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static void rmi_f30_set_ctrl_data(struct rmi_f30_ctrl_data *ctrl,
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int *ctrl_addr, int len, u8 **reg)
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{
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ctrl->address = *ctrl_addr;
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ctrl->length = len;
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ctrl->regs = *reg;
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*ctrl_addr += len;
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*reg += len;
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}
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static bool rmi_f30_is_valid_button(int button, struct rmi_f30_ctrl_data *ctrl)
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{
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int byte_position = button >> 3;
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int bit_position = button & 0x07;
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/*
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* ctrl2 -> dir == 0 -> input mode
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* ctrl3 -> data == 1 -> actual button
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*/
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return !(ctrl[2].regs[byte_position] & BIT(bit_position)) &&
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(ctrl[3].regs[byte_position] & BIT(bit_position));
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}
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static int rmi_f30_map_gpios(struct rmi_function *fn,
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struct f30_data *f30)
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{
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const struct rmi_device_platform_data *pdata =
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rmi_get_platform_data(fn->rmi_dev);
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struct input_dev *input = f30->input;
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unsigned int button = BTN_LEFT;
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unsigned int trackstick_button = BTN_LEFT;
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bool button_mapped = false;
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int i;
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int button_count = min_t(u8, f30->gpioled_count, TRACKSTICK_RANGE_END);
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f30->gpioled_key_map = devm_kcalloc(&fn->dev,
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button_count,
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sizeof(f30->gpioled_key_map[0]),
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GFP_KERNEL);
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if (!f30->gpioled_key_map) {
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dev_err(&fn->dev, "Failed to allocate gpioled map memory.\n");
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return -ENOMEM;
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}
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for (i = 0; i < button_count; i++) {
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if (!rmi_f30_is_valid_button(i, f30->ctrl))
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continue;
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if (pdata->f30_data.trackstick_buttons &&
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i >= TRACKSTICK_RANGE_START && i < TRACKSTICK_RANGE_END) {
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f30->gpioled_key_map[i] = trackstick_button++;
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} else if (!pdata->f30_data.buttonpad || !button_mapped) {
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f30->gpioled_key_map[i] = button;
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input_set_capability(input, EV_KEY, button++);
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button_mapped = true;
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}
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}
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input->keycode = f30->gpioled_key_map;
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input->keycodesize = sizeof(f30->gpioled_key_map[0]);
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input->keycodemax = f30->gpioled_count;
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/*
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* Buttonpad could be also inferred from f30->has_mech_mouse_btns,
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* but I am not sure, so use only the pdata info and the number of
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* mapped buttons.
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*/
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if (pdata->f30_data.buttonpad || (button - BTN_LEFT == 1))
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__set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
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return 0;
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}
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static int rmi_f30_initialize(struct rmi_function *fn, struct f30_data *f30)
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{
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u8 *ctrl_reg = f30->ctrl_regs;
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int control_address = fn->fd.control_base_addr;
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u8 buf[RMI_F30_QUERY_SIZE];
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int error;
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error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
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buf, RMI_F30_QUERY_SIZE);
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if (error) {
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dev_err(&fn->dev, "Failed to read query register\n");
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return error;
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}
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f30->has_extended_pattern = buf[0] & RMI_F30_EXTENDED_PATTERNS;
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f30->has_mappable_buttons = buf[0] & RMI_F30_HAS_MAPPABLE_BUTTONS;
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f30->has_led = buf[0] & RMI_F30_HAS_LED;
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f30->has_gpio = buf[0] & RMI_F30_HAS_GPIO;
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f30->has_haptic = buf[0] & RMI_F30_HAS_HAPTIC;
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f30->has_gpio_driver_control = buf[0] & RMI_F30_HAS_GPIO_DRV_CTL;
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f30->has_mech_mouse_btns = buf[0] & RMI_F30_HAS_MECH_MOUSE_BTNS;
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f30->gpioled_count = buf[1] & RMI_F30_GPIO_LED_COUNT;
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f30->register_count = DIV_ROUND_UP(f30->gpioled_count, 8);
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if (f30->has_gpio && f30->has_led)
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rmi_f30_set_ctrl_data(&f30->ctrl[0], &control_address,
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f30->register_count, &ctrl_reg);
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rmi_f30_set_ctrl_data(&f30->ctrl[1], &control_address,
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sizeof(u8), &ctrl_reg);
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if (f30->has_gpio) {
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rmi_f30_set_ctrl_data(&f30->ctrl[2], &control_address,
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f30->register_count, &ctrl_reg);
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rmi_f30_set_ctrl_data(&f30->ctrl[3], &control_address,
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f30->register_count, &ctrl_reg);
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}
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if (f30->has_led) {
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rmi_f30_set_ctrl_data(&f30->ctrl[4], &control_address,
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f30->register_count, &ctrl_reg);
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rmi_f30_set_ctrl_data(&f30->ctrl[5], &control_address,
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f30->has_extended_pattern ? 6 : 2,
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&ctrl_reg);
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}
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if (f30->has_led || f30->has_gpio_driver_control) {
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/* control 6 uses a byte per gpio/led */
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rmi_f30_set_ctrl_data(&f30->ctrl[6], &control_address,
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f30->gpioled_count, &ctrl_reg);
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}
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if (f30->has_mappable_buttons) {
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/* control 7 uses a byte per gpio/led */
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rmi_f30_set_ctrl_data(&f30->ctrl[7], &control_address,
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f30->gpioled_count, &ctrl_reg);
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}
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if (f30->has_haptic) {
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rmi_f30_set_ctrl_data(&f30->ctrl[8], &control_address,
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f30->register_count, &ctrl_reg);
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rmi_f30_set_ctrl_data(&f30->ctrl[9], &control_address,
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sizeof(u8), &ctrl_reg);
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}
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if (f30->has_mech_mouse_btns)
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rmi_f30_set_ctrl_data(&f30->ctrl[10], &control_address,
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sizeof(u8), &ctrl_reg);
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f30->ctrl_regs_size = ctrl_reg -
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f30->ctrl_regs ?: RMI_F30_CTRL_REGS_MAX_SIZE;
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error = rmi_f30_read_control_parameters(fn, f30);
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if (error) {
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dev_err(&fn->dev,
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"Failed to initialize F30 control params: %d\n",
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error);
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return error;
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}
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if (f30->has_gpio) {
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error = rmi_f30_map_gpios(fn, f30);
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if (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_f30_probe(struct rmi_function *fn)
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{
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struct rmi_device *rmi_dev = fn->rmi_dev;
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const struct rmi_device_platform_data *pdata =
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rmi_get_platform_data(rmi_dev);
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struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
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struct f30_data *f30;
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int error;
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if (pdata->f30_data.disable)
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return 0;
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if (!drv_data->input) {
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dev_info(&fn->dev, "F30: no input device found, ignoring\n");
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return -ENXIO;
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}
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f30 = devm_kzalloc(&fn->dev, sizeof(*f30), GFP_KERNEL);
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if (!f30)
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return -ENOMEM;
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f30->input = drv_data->input;
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error = rmi_f30_initialize(fn, f30);
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if (error)
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return error;
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dev_set_drvdata(&fn->dev, f30);
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return 0;
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}
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struct rmi_function_handler rmi_f30_handler = {
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.driver = {
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.name = "rmi4_f30",
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},
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.func = 0x30,
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.probe = rmi_f30_probe,
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.config = rmi_f30_config,
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.attention = rmi_f30_attention,
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};
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