Release 4.11 drivers/input/rmi4/rmi_driver.c
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*
* This driver provides the core support for a single RMI4-based device.
*
* The RMI4 specification can be found here (URL split for line length):
*
* http://www.synaptics.com/sites/default/files/
* 511-000136-01-Rev-E-RMI4-Interfacing-Guide.pdf
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
#include <linux/bitmap.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/irq.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <uapi/linux/input.h>
#include <linux/rmi.h>
#include "rmi_bus.h"
#include "rmi_driver.h"
#define HAS_NONSTANDARD_PDT_MASK 0x40
#define RMI4_MAX_PAGE 0xff
#define RMI4_PAGE_SIZE 0x100
#define RMI4_PAGE_MASK 0xFF00
#define RMI_DEVICE_RESET_CMD 0x01
#define DEFAULT_RESET_DELAY_MS 100
void rmi_free_function_list(struct rmi_device *rmi_dev)
{
struct rmi_function *fn, *tmp;
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev, "Freeing function list\n");
devm_kfree(&rmi_dev->dev, data->irq_memory);
data->irq_memory = NULL;
data->irq_status = NULL;
data->fn_irq_bits = NULL;
data->current_irq_mask = NULL;
data->new_irq_mask = NULL;
data->f01_container = NULL;
data->f34_container = NULL;
/* Doing it in the reverse order so F01 will be removed last */
list_for_each_entry_safe_reverse(fn, tmp,
&data->function_list, node) {
list_del(&fn->node);
rmi_unregister_function(fn);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 63 | 51.22% | 1 | 33.33% |
Nick Dyer | 60 | 48.78% | 2 | 66.67% |
Total | 123 | 100.00% | 3 | 100.00% |
static int reset_one_function(struct rmi_function *fn)
{
struct rmi_function_handler *fh;
int retval = 0;
if (!fn || !fn->dev.driver)
return 0;
fh = to_rmi_function_handler(fn->dev.driver);
if (fh->reset) {
retval = fh->reset(fn);
if (retval < 0)
dev_err(&fn->dev, "Reset failed with code %d.\n",
retval);
}
return retval;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 85 | 100.00% | 1 | 100.00% |
Total | 85 | 100.00% | 1 | 100.00% |
static int configure_one_function(struct rmi_function *fn)
{
struct rmi_function_handler *fh;
int retval = 0;
if (!fn || !fn->dev.driver)
return 0;
fh = to_rmi_function_handler(fn->dev.driver);
if (fh->config) {
retval = fh->config(fn);
if (retval < 0)
dev_err(&fn->dev, "Config failed with code %d.\n",
retval);
}
return retval;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 85 | 100.00% | 1 | 100.00% |
Total | 85 | 100.00% | 1 | 100.00% |
static int rmi_driver_process_reset_requests(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
int retval;
list_for_each_entry(entry, &data->function_list, node) {
retval = reset_one_function(entry);
if (retval < 0)
return retval;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 61 | 100.00% | 1 | 100.00% |
Total | 61 | 100.00% | 1 | 100.00% |
static int rmi_driver_process_config_requests(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
int retval;
list_for_each_entry(entry, &data->function_list, node) {
retval = configure_one_function(entry);
if (retval < 0)
return retval;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 61 | 100.00% | 1 | 100.00% |
Total | 61 | 100.00% | 1 | 100.00% |
static void process_one_interrupt(struct rmi_driver_data *data,
struct rmi_function *fn)
{
struct rmi_function_handler *fh;
if (!fn || !fn->dev.driver)
return;
fh = to_rmi_function_handler(fn->dev.driver);
if (fh->attention) {
bitmap_and(data->fn_irq_bits, data->irq_status, fn->irq_mask,
data->irq_count);
if (!bitmap_empty(data->fn_irq_bits, data->irq_count))
fh->attention(fn, data->fn_irq_bits);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 97 | 100.00% | 1 | 100.00% |
Total | 97 | 100.00% | 1 | 100.00% |
static int rmi_process_interrupt_requests(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct device *dev = &rmi_dev->dev;
struct rmi_function *entry;
int error;
if (!data)
return 0;
if (!data->attn_data.data) {
error = rmi_read_block(rmi_dev,
data->f01_container->fd.data_base_addr + 1,
data->irq_status, data->num_of_irq_regs);
if (error < 0) {
dev_err(dev, "Failed to read irqs, code=%d\n", error);
return error;
}
}
mutex_lock(&data->irq_mutex);
bitmap_and(data->irq_status, data->irq_status, data->current_irq_mask,
data->irq_count);
/*
* At this point, irq_status has all bits that are set in the
* interrupt status register and are enabled.
*/
mutex_unlock(&data->irq_mutex);
/*
* It would be nice to be able to use irq_chip to handle these
* nested IRQs. Unfortunately, most of the current customers for
* this driver are using older kernels (3.0.x) that don't support
* the features required for that. Once they've shifted to more
* recent kernels (say, 3.3 and higher), this should be switched to
* use irq_chip.
*/
list_for_each_entry(entry, &data->function_list, node)
process_one_interrupt(data, entry);
if (data->input)
input_sync(data->input);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 170 | 97.70% | 1 | 33.33% |
Benjamin Tissoires | 3 | 1.72% | 1 | 33.33% |
Björn Andersson | 1 | 0.57% | 1 | 33.33% |
Total | 174 | 100.00% | 3 | 100.00% |
void rmi_set_attn_data(struct rmi_device *rmi_dev, unsigned long irq_status,
void *data, size_t size)
{
struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
struct rmi4_attn_data attn_data;
void *fifo_data;
if (!drvdata->enabled)
return;
fifo_data = kmemdup(data, size, GFP_ATOMIC);
if (!fifo_data)
return;
attn_data.irq_status = irq_status;
attn_data.size = size;
attn_data.data = fifo_data;
kfifo_put(&drvdata->attn_fifo, attn_data);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Benjamin Tissoires | 65 | 68.42% | 1 | 50.00% |
Andrew Duggan | 30 | 31.58% | 1 | 50.00% |
Total | 95 | 100.00% | 2 | 100.00% |
EXPORT_SYMBOL_GPL(rmi_set_attn_data);
static irqreturn_t rmi_irq_fn(int irq, void *dev_id)
{
struct rmi_device *rmi_dev = dev_id;
struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev);
struct rmi4_attn_data attn_data = {0};
int ret, count;
count = kfifo_get(&drvdata->attn_fifo, &attn_data);
if (count) {
*(drvdata->irq_status) = attn_data.irq_status;
drvdata->attn_data = attn_data;
}
ret = rmi_process_interrupt_requests(rmi_dev);
if (ret)
rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev,
"Failed to process interrupt request: %d\n", ret);
if (count)
kfree(attn_data.data);
if (!kfifo_is_empty(&drvdata->attn_fifo))
return rmi_irq_fn(irq, dev_id);
return IRQ_HANDLED;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Benjamin Tissoires | 70 | 50.00% | 2 | 50.00% |
Björn Andersson | 36 | 25.71% | 1 | 25.00% |
Andrew Duggan | 34 | 24.29% | 1 | 25.00% |
Total | 140 | 100.00% | 4 | 100.00% |
static int rmi_irq_init(struct rmi_device *rmi_dev)
{
struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
int irq_flags = irq_get_trigger_type(pdata->irq);
int ret;
if (!irq_flags)
irq_flags = IRQF_TRIGGER_LOW;
ret = devm_request_threaded_irq(&rmi_dev->dev, pdata->irq, NULL,
rmi_irq_fn, irq_flags | IRQF_ONESHOT,
dev_name(rmi_dev->xport->dev),
rmi_dev);
if (ret < 0) {
dev_err(&rmi_dev->dev, "Failed to register interrupt %d\n",
pdata->irq);
return ret;
}
data->enabled = true;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Björn Andersson | 98 | 79.67% | 1 | 33.33% |
Benjamin Tissoires | 19 | 15.45% | 1 | 33.33% |
Andrew Duggan | 6 | 4.88% | 1 | 33.33% |
Total | 123 | 100.00% | 3 | 100.00% |
struct rmi_function *rmi_find_function(struct rmi_device *rmi_dev, u8 number)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
list_for_each_entry(entry, &data->function_list, node) {
if (entry->fd.function_number == number)
return entry;
}
return NULL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Benjamin Tissoires | 59 | 100.00% | 1 | 100.00% |
Total | 59 | 100.00% | 1 | 100.00% |
static int suspend_one_function(struct rmi_function *fn)
{
struct rmi_function_handler *fh;
int retval = 0;
if (!fn || !fn->dev.driver)
return 0;
fh = to_rmi_function_handler(fn->dev.driver);
if (fh->suspend) {
retval = fh->suspend(fn);
if (retval < 0)
dev_err(&fn->dev, "Suspend failed with code %d.\n",
retval);
}
return retval;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 85 | 100.00% | 1 | 100.00% |
Total | 85 | 100.00% | 1 | 100.00% |
static int rmi_suspend_functions(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
int retval;
list_for_each_entry(entry, &data->function_list, node) {
retval = suspend_one_function(entry);
if (retval < 0)
return retval;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 61 | 100.00% | 1 | 100.00% |
Total | 61 | 100.00% | 1 | 100.00% |
static int resume_one_function(struct rmi_function *fn)
{
struct rmi_function_handler *fh;
int retval = 0;
if (!fn || !fn->dev.driver)
return 0;
fh = to_rmi_function_handler(fn->dev.driver);
if (fh->resume) {
retval = fh->resume(fn);
if (retval < 0)
dev_err(&fn->dev, "Resume failed with code %d.\n",
retval);
}
return retval;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 85 | 100.00% | 1 | 100.00% |
Total | 85 | 100.00% | 1 | 100.00% |
static int rmi_resume_functions(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_function *entry;
int retval;
list_for_each_entry(entry, &data->function_list, node) {
retval = resume_one_function(entry);
if (retval < 0)
return retval;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 61 | 100.00% | 1 | 100.00% |
Total | 61 | 100.00% | 1 | 100.00% |
int rmi_enable_sensor(struct rmi_device *rmi_dev)
{
int retval = 0;
retval = rmi_driver_process_config_requests(rmi_dev);
if (retval < 0)
return retval;
return rmi_process_interrupt_requests(rmi_dev);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 36 | 97.30% | 1 | 50.00% |
Nick Dyer | 1 | 2.70% | 1 | 50.00% |
Total | 37 | 100.00% | 2 | 100.00% |
/**
* rmi_driver_set_input_params - set input device id and other data.
*
* @rmi_dev: Pointer to an RMI device
* @input: Pointer to input device
*
*/
static int rmi_driver_set_input_params(struct rmi_device *rmi_dev,
struct input_dev *input)
{
input->name = SYNAPTICS_INPUT_DEVICE_NAME;
input->id.vendor = SYNAPTICS_VENDOR_ID;
input->id.bustype = BUS_RMI;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 41 | 100.00% | 1 | 100.00% |
Total | 41 | 100.00% | 1 | 100.00% |
static void rmi_driver_set_input_name(struct rmi_device *rmi_dev,
struct input_dev *input)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
const char *device_name = rmi_f01_get_product_ID(data->f01_container);
char *name;
name = devm_kasprintf(&rmi_dev->dev, GFP_KERNEL,
"Synaptics %s", device_name);
if (!name)
return;
input->name = name;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 72 | 98.63% | 1 | 50.00% |
Nick Dyer | 1 | 1.37% | 1 | 50.00% |
Total | 73 | 100.00% | 2 | 100.00% |
static int rmi_driver_set_irq_bits(struct rmi_device *rmi_dev,
unsigned long *mask)
{
int error = 0;
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct device *dev = &rmi_dev->dev;
mutex_lock(&data->irq_mutex);
bitmap_or(data->new_irq_mask,
data->current_irq_mask, mask, data->irq_count);
error = rmi_write_block(rmi_dev,
data->f01_container->fd.control_base_addr + 1,
data->new_irq_mask, data->num_of_irq_regs);
if (error < 0) {
dev_err(dev, "%s: Failed to change enabled interrupts!",
__func__);
goto error_unlock;
}
bitmap_copy(data->current_irq_mask, data->new_irq_mask,
data->num_of_irq_regs);
error_unlock:
mutex_unlock(&data->irq_mutex);
return error;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 142 | 100.00% | 1 | 100.00% |
Total | 142 | 100.00% | 1 | 100.00% |
static int rmi_driver_clear_irq_bits(struct rmi_device *rmi_dev,
unsigned long *mask)
{
int error = 0;
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct device *dev = &rmi_dev->dev;
mutex_lock(&data->irq_mutex);
bitmap_andnot(data->new_irq_mask,
data->current_irq_mask, mask, data->irq_count);
error = rmi_write_block(rmi_dev,
data->f01_container->fd.control_base_addr + 1,
data->new_irq_mask, data->num_of_irq_regs);
if (error < 0) {
dev_err(dev, "%s: Failed to change enabled interrupts!",
__func__);
goto error_unlock;
}
bitmap_copy(data->current_irq_mask, data->new_irq_mask,
data->num_of_irq_regs);
error_unlock:
mutex_unlock(&data->irq_mutex);
return error;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 142 | 100.00% | 1 | 100.00% |
Total | 142 | 100.00% | 1 | 100.00% |
static int rmi_driver_reset_handler(struct rmi_device *rmi_dev)
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
int error;
/*
* Can get called before the driver is fully ready to deal with
* this situation.
*/
if (!data || !data->f01_container) {
dev_warn(&rmi_dev->dev,
"Not ready to handle reset yet!\n");
return 0;
}
error = rmi_read_block(rmi_dev,
data->f01_container->fd.control_base_addr + 1,
data->current_irq_mask, data->num_of_irq_regs);
if (error < 0) {
dev_err(&rmi_dev->dev, "%s: Failed to read current IRQ mask.\n",
__func__);
return error;
}
error = rmi_driver_process_reset_requests(rmi_dev);
if (error < 0)
return error;
error = rmi_driver_process_config_requests(rmi_dev);
if (error < 0)
return error;
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 136 | 100.00% | 1 | 100.00% |
Total | 136 | 100.00% | 1 | 100.00% |
static int rmi_read_pdt_entry(struct rmi_device *rmi_dev,
struct pdt_entry *entry, u16 pdt_address)
{
u8 buf[RMI_PDT_ENTRY_SIZE];
int error;
error = rmi_read_block(rmi_dev, pdt_address, buf, RMI_PDT_ENTRY_SIZE);
if (error) {
dev_err(&rmi_dev->dev, "Read PDT entry at %#06x failed, code: %d.\n",
pdt_address, error);
return error;
}
entry->page_start = pdt_address & RMI4_PAGE_MASK;
entry->query_base_addr = buf[0];
entry->command_base_addr = buf[1];
entry->control_base_addr = buf[2];
entry->data_base_addr = buf[3];
entry->interrupt_source_count = buf[4] & RMI_PDT_INT_SOURCE_COUNT_MASK;
entry->function_version = (buf[4] & RMI_PDT_FUNCTION_VERSION_MASK) >> 5;
entry->function_number = buf[5];
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 145 | 99.32% | 1 | 50.00% |
Benjamin Tissoires | 1 | 0.68% | 1 | 50.00% |
Total | 146 | 100.00% | 2 | 100.00% |
static void rmi_driver_copy_pdt_to_fd(const struct pdt_entry *pdt,
struct rmi_function_descriptor *fd)
{
fd->query_base_addr = pdt->query_base_addr + pdt->page_start;
fd->command_base_addr = pdt->command_base_addr + pdt->page_start;
fd->control_base_addr = pdt->control_base_addr + pdt->page_start;
fd->data_base_addr = pdt->data_base_addr + pdt->page_start;
fd->function_number = pdt->function_number;
fd->interrupt_source_count = pdt->interrupt_source_count;
fd->function_version = pdt->function_version;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 89 | 100.00% | 1 | 100.00% |
Total | 89 | 100.00% | 1 | 100.00% |
#define RMI_SCAN_CONTINUE 0
#define RMI_SCAN_DONE 1
static int rmi_scan_pdt_page(struct rmi_device *rmi_dev,
int page,
int *empty_pages,
void *ctx,
int (*callback)(struct rmi_device *rmi_dev,
void *ctx,
const struct pdt_entry *entry))
{
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
struct pdt_entry pdt_entry;
u16 page_start = RMI4_PAGE_SIZE * page;
u16 pdt_start = page_start + PDT_START_SCAN_LOCATION;
u16 pdt_end = page_start + PDT_END_SCAN_LOCATION;
u16 addr;
int error;
int retval;
for (addr = pdt_start; addr >= pdt_end; addr -= RMI_PDT_ENTRY_SIZE) {
error = rmi_read_pdt_entry(rmi_dev, &pdt_entry, addr);
if (error)
return error;
if (RMI4_END_OF_PDT(pdt_entry.function_number))
break;
retval = callback(rmi_dev, ctx, &pdt_entry);
if (retval != RMI_SCAN_CONTINUE)
return retval;
}
/*
* Count number of empty PDT pages. If a gap of two pages
* or more is found, stop scanning.
*/
if (addr == pdt_start)
++*empty_pages;
else
*empty_pages = 0;
return (data->bootloader_mode || *empty_pages >= 2) ?
RMI_SCAN_DONE : RMI_SCAN_CONTINUE;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 164 | 86.32% | 1 | 33.33% |
Nick Dyer | 26 | 13.68% | 2 | 66.67% |
Total | 190 | 100.00% | 3 | 100.00% |
int rmi_scan_pdt(struct rmi_device *rmi_dev, void *ctx,
int (*callback)(struct rmi_device *rmi_dev,
void *ctx, const struct pdt_entry *entry))
{
int page;
int empty_pages = 0;
int retval = RMI_SCAN_DONE;
for (page = 0; page <= RMI4_MAX_PAGE; page++) {
retval = rmi_scan_pdt_page(rmi_dev, page, &empty_pages,
ctx, callback);
if (retval != RMI_SCAN_CONTINUE)
break;
}
return retval < 0 ? retval : 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 88 | 91.67% | 1 | 50.00% |
Nick Dyer | 8 | 8.33% | 1 | 50.00% |
Total | 96 | 100.00% | 2 | 100.00% |
int rmi_read_register_desc(struct rmi_device *d, u16 addr,
struct rmi_register_descriptor *rdesc)
{
int ret;
u8 size_presence_reg;
u8 buf[35];
int presense_offset = 1;
u8 *struct_buf;
int reg;
int offset = 0;
int map_offset = 0;
int i;
int b;
/*
* The first register of the register descriptor is the size of
* the register descriptor's presense register.
*/
ret = rmi_read(d, addr, &size_presence_reg);
if (ret)
return ret;
++addr;
if (size_presence_reg < 0 || size_presence_reg > 35)
return -EIO;
memset(buf, 0, sizeof(buf));
/*
* The presence register contains the size of the register structure
* and a bitmap which identified which packet registers are present
* for this particular register type (ie query, control, or data).
*/
ret = rmi_read_block(d, addr, buf, size_presence_reg);
if (ret)
return ret;
++addr;
if (buf[0] == 0) {
presense_offset = 3;
rdesc->struct_size = buf[1] | (buf[2] << 8);
} else {
rdesc->struct_size = buf[0];
}
for (i = presense_offset; i < size_presence_reg; i++) {
for (b = 0; b < 8; b++) {
if (buf[i] & (0x1 << b))
bitmap_set(rdesc->presense_map, map_offset, 1);
++map_offset;
}
}
rdesc->num_registers = bitmap_weight(rdesc->presense_map,
RMI_REG_DESC_PRESENSE_BITS);
rdesc->registers = devm_kzalloc(&d->dev, rdesc->num_registers *
sizeof(struct rmi_register_desc_item),
GFP_KERNEL);
if (!rdesc->registers)
return -ENOMEM;
/*
* Allocate a temporary buffer to hold the register structure.
* I'm not using devm_kzalloc here since it will not be retained
* after exiting this function
*/
struct_buf = kzalloc(rdesc->struct_size, GFP_KERNEL);
if (!struct_buf)
return -ENOMEM;
/*
* The register structure contains information about every packet
* register of this type. This includes the size of the packet
* register and a bitmap of all subpackets contained in the packet
* register.
*/
ret = rmi_read_block(d, addr, struct_buf, rdesc->struct_size);
if (ret)
goto free_struct_buff;
reg = find_first_bit