mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-14 06:24:53 +08:00
8de262531f
- Set 'struct device' fwnode when registering a new device - New Drivers - Add support for ROHM BD70528 PMIC - New Device Support - Add support for LP87561 4-Phase Regulator to TI LP87565 PMIC - Add support for RK809 and RK817 to Rockchip RK808 - Add support for Lid Angle to ChromeOS core - Add support for CS47L15 CODEC to Madera core - Add support for CS47L92 CODEC to Madera core - Add support for ChromeOS (legacy) Accelerometers in ChromeOS core - Add support for Add Intel Elkhart Lake PCH to Intel LPSS - New Functionality - Provide regulator supply information when registering; madera-core - Additional Device Tree support; lp87565, madera, cros-ec, rohm,bd71837-pmic - Allow over-riding power button press via Device Tree; rohm-bd718x7 - Differentiate between running processors; cros_ec_dev - Fix-ups - Big header file update; cros_ec_commands.h - Split header per-subsystem; rohm-bd718x7 - Remove superfluous code; menelaus, cs5535-mfd, cs47lXX-tables - Trivial; sorting, coding style; intel-lpss-pci - Only remove Power Off functionality if set locally; rk808 - Make use for Power Off Prepare(); rk808 - Fix spelling mistake in header guards; stmfx - Properly free IDA resources - SPDX fixups; cs47lXX-tables, madera - Error path fixups; hi655x-pmic - Bug Fixes - Add missing break in case() statement - Repair undefined behaviour when not initialising variables; arizona-core, madera-core - Fix reference to Device Tree documentation; madera -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEdrbJNaO+IJqU8IdIUa+KL4f8d2EFAl0sLxgACgkQUa+KL4f8 d2E25Q/9HmDJIdfyDQg0xv5IM5HS1WsP9BcJCEgoRIsad4mMDRYt+ZeLbslwMhue E9tsFH359gGvyqR+7d6hPpEUET1UEcJy4eRD1zAc0+epllQTDHSy8oHt1dtH+8xB 2AU5rvAKOqBk83D+V2Hkx2KcroWEQQNYIoR9/12Pi3xmEB1uaCO0/Ajd3B28bIBM Tzi3cVQ3U7jY9EIM44GVTsjDAbMSkQR0iab6cQF0vJAWaUmGKlsO7iRrU1XkN69V qXyBauI8WGiGssihrE8r+jYvHvmg7hA9OKZIckUaMXD/k7kpHbwIaFRh7gukq4Re Q6Cy30NfVJ1tY66/5oqN6gj5znfeuEudMCCzYAkzlROSp5eApe2Ke5ajYn3kOCZd ZKcsrw9Fiox1lKmuWXDbyf0nqf4zwdDPAnShRWaaF5aipwgywyGcwSigVtK4F0P5 Hjc5RLv7GjTAJq+ZzwgKyAdtx8L0mhdLd1ZTQpEXk/g/E9dW4GF72hWj9TQ/9BnA ZflKv8aP3lDGRHgO3Huwi4lMzskB8BVCQMCFwLwGs5cY1oZQhAjTdJzBZjTGexhC evuuA8OUsCrOWMvnZf3saSdHJ1iMHtfPnqEGHRJQtNj4fFaXv80LasIomvvfJc1/ 9JlRyAgm2pF7YDrgTh65ZzBb324eKSZZoAj9XZbnTyzxUAcF69A= =A3jw -----END PGP SIGNATURE----- Merge tag 'mfd-next-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd Pull MFD updates from Lee Jones: "Core Frameworks: - Set 'struct device' fwnode when registering a new device New Drivers: - Add support for ROHM BD70528 PMIC New Device Support: - Add support for LP87561 4-Phase Regulator to TI LP87565 PMIC - Add support for RK809 and RK817 to Rockchip RK808 - Add support for Lid Angle to ChromeOS core - Add support for CS47L15 CODEC to Madera core - Add support for CS47L92 CODEC to Madera core - Add support for ChromeOS (legacy) Accelerometers in ChromeOS core - Add support for Add Intel Elkhart Lake PCH to Intel LPSS New Functionality: - Provide regulator supply information when registering; madera-core - Additional Device Tree support; lp87565, madera, cros-ec, rohm,bd71837-pmic - Allow over-riding power button press via Device Tree; rohm-bd718x7 - Differentiate between running processors; cros_ec_dev Fix-ups: - Big header file update; cros_ec_commands.h - Split header per-subsystem; rohm-bd718x7 - Remove superfluous code; menelaus, cs5535-mfd, cs47lXX-tables - Trivial; sorting, coding style; intel-lpss-pci - Only remove Power Off functionality if set locally; rk808 - Make use for Power Off Prepare(); rk808 - Fix spelling mistake in header guards; stmfx - Properly free IDA resources - SPDX fixups; cs47lXX-tables, madera - Error path fixups; hi655x-pmic Bug Fixes: - Add missing break in case() statement - Repair undefined behaviour when not initialising variables; arizona-core, madera-core - Fix reference to Device Tree documentation; madera" * tag 'mfd-next-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (45 commits) mfd: hi655x-pmic: Fix missing return value check for devm_regmap_init_mmio_clk mfd: madera: Fixup SPDX headers mfd: madera: Remove some unused registers and fix some defaults mfd: intel-lpss: Release IDA resources mfd: intel-lpss: Add Intel Elkhart Lake PCH PCI IDs mfd: cs5535-mfd: Remove ifdef OLPC noise mfd: stmfx: Fix macro definition spelling dt-bindings: mfd: Add link to ROHM BD71847 Datasheet MAINAINERS: Swap words in INTEL PMIC MULTIFUNCTION DEVICE DRIVERS mfd: cros_ec_dev: Register cros_ec_accel_legacy driver as a subdevice mfd: rk808: Prepare rk805 for poweroff mfd: rk808: Check pm_power_off pointer mfd: cros_ec: differentiate SCP from EC by feature bit dt-bindings: Add binding for cros-ec-rpmsg mfd: madera: Add Madera core support for CS47L92 mfd: madera: Add Madera core support for CS47L15 mfd: madera: Update DT bindings to add additional CODECs mfd: madera: Add supply mapping for MICVDD mfd: madera: Fix potential uninitialised use of variable mfd: madera: Fix bad reference to pinctrl.txt file ...
694 lines
17 KiB
C
694 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* cros_ec_dev - expose the Chrome OS Embedded Controller to user-space
|
|
*
|
|
* Copyright (C) 2014 Google, Inc.
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/module.h>
|
|
#include <linux/mod_devicetable.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/uaccess.h>
|
|
|
|
#include "cros_ec_dev.h"
|
|
|
|
#define DRV_NAME "cros-ec-dev"
|
|
|
|
/* Device variables */
|
|
#define CROS_MAX_DEV 128
|
|
static int ec_major;
|
|
|
|
static struct class cros_class = {
|
|
.owner = THIS_MODULE,
|
|
.name = "chromeos",
|
|
};
|
|
|
|
/* Basic communication */
|
|
static int ec_get_version(struct cros_ec_dev *ec, char *str, int maxlen)
|
|
{
|
|
struct ec_response_get_version *resp;
|
|
static const char * const current_image_name[] = {
|
|
"unknown", "read-only", "read-write", "invalid",
|
|
};
|
|
struct cros_ec_command *msg;
|
|
int ret;
|
|
|
|
msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
msg->version = 0;
|
|
msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
|
|
msg->insize = sizeof(*resp);
|
|
msg->outsize = 0;
|
|
|
|
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
|
|
if (ret < 0)
|
|
goto exit;
|
|
|
|
if (msg->result != EC_RES_SUCCESS) {
|
|
snprintf(str, maxlen,
|
|
"%s\nUnknown EC version: EC returned %d\n",
|
|
CROS_EC_DEV_VERSION, msg->result);
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
|
|
resp = (struct ec_response_get_version *)msg->data;
|
|
if (resp->current_image >= ARRAY_SIZE(current_image_name))
|
|
resp->current_image = 3; /* invalid */
|
|
|
|
snprintf(str, maxlen, "%s\n%s\n%s\n%s\n", CROS_EC_DEV_VERSION,
|
|
resp->version_string_ro, resp->version_string_rw,
|
|
current_image_name[resp->current_image]);
|
|
|
|
ret = 0;
|
|
exit:
|
|
kfree(msg);
|
|
return ret;
|
|
}
|
|
|
|
static int cros_ec_check_features(struct cros_ec_dev *ec, int feature)
|
|
{
|
|
struct cros_ec_command *msg;
|
|
int ret;
|
|
|
|
if (ec->features[0] == -1U && ec->features[1] == -1U) {
|
|
/* features bitmap not read yet */
|
|
|
|
msg = kmalloc(sizeof(*msg) + sizeof(ec->features), GFP_KERNEL);
|
|
if (!msg)
|
|
return -ENOMEM;
|
|
|
|
msg->version = 0;
|
|
msg->command = EC_CMD_GET_FEATURES + ec->cmd_offset;
|
|
msg->insize = sizeof(ec->features);
|
|
msg->outsize = 0;
|
|
|
|
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
|
|
if (ret < 0 || msg->result != EC_RES_SUCCESS) {
|
|
dev_warn(ec->dev, "cannot get EC features: %d/%d\n",
|
|
ret, msg->result);
|
|
memset(ec->features, 0, sizeof(ec->features));
|
|
} else {
|
|
memcpy(ec->features, msg->data, sizeof(ec->features));
|
|
}
|
|
|
|
dev_dbg(ec->dev, "EC features %08x %08x\n",
|
|
ec->features[0], ec->features[1]);
|
|
|
|
kfree(msg);
|
|
}
|
|
|
|
return ec->features[feature / 32] & EC_FEATURE_MASK_0(feature);
|
|
}
|
|
|
|
/* Device file ops */
|
|
static int ec_device_open(struct inode *inode, struct file *filp)
|
|
{
|
|
struct cros_ec_dev *ec = container_of(inode->i_cdev,
|
|
struct cros_ec_dev, cdev);
|
|
filp->private_data = ec;
|
|
nonseekable_open(inode, filp);
|
|
return 0;
|
|
}
|
|
|
|
static int ec_device_release(struct inode *inode, struct file *filp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t ec_device_read(struct file *filp, char __user *buffer,
|
|
size_t length, loff_t *offset)
|
|
{
|
|
struct cros_ec_dev *ec = filp->private_data;
|
|
char msg[sizeof(struct ec_response_get_version) +
|
|
sizeof(CROS_EC_DEV_VERSION)];
|
|
size_t count;
|
|
int ret;
|
|
|
|
if (*offset != 0)
|
|
return 0;
|
|
|
|
ret = ec_get_version(ec, msg, sizeof(msg));
|
|
if (ret)
|
|
return ret;
|
|
|
|
count = min(length, strlen(msg));
|
|
|
|
if (copy_to_user(buffer, msg, count))
|
|
return -EFAULT;
|
|
|
|
*offset = count;
|
|
return count;
|
|
}
|
|
|
|
/* Ioctls */
|
|
static long ec_device_ioctl_xcmd(struct cros_ec_dev *ec, void __user *arg)
|
|
{
|
|
long ret;
|
|
struct cros_ec_command u_cmd;
|
|
struct cros_ec_command *s_cmd;
|
|
|
|
if (copy_from_user(&u_cmd, arg, sizeof(u_cmd)))
|
|
return -EFAULT;
|
|
|
|
if ((u_cmd.outsize > EC_MAX_MSG_BYTES) ||
|
|
(u_cmd.insize > EC_MAX_MSG_BYTES))
|
|
return -EINVAL;
|
|
|
|
s_cmd = kmalloc(sizeof(*s_cmd) + max(u_cmd.outsize, u_cmd.insize),
|
|
GFP_KERNEL);
|
|
if (!s_cmd)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(s_cmd, arg, sizeof(*s_cmd) + u_cmd.outsize)) {
|
|
ret = -EFAULT;
|
|
goto exit;
|
|
}
|
|
|
|
if (u_cmd.outsize != s_cmd->outsize ||
|
|
u_cmd.insize != s_cmd->insize) {
|
|
ret = -EINVAL;
|
|
goto exit;
|
|
}
|
|
|
|
s_cmd->command += ec->cmd_offset;
|
|
ret = cros_ec_cmd_xfer(ec->ec_dev, s_cmd);
|
|
/* Only copy data to userland if data was received. */
|
|
if (ret < 0)
|
|
goto exit;
|
|
|
|
if (copy_to_user(arg, s_cmd, sizeof(*s_cmd) + s_cmd->insize))
|
|
ret = -EFAULT;
|
|
exit:
|
|
kfree(s_cmd);
|
|
return ret;
|
|
}
|
|
|
|
static long ec_device_ioctl_readmem(struct cros_ec_dev *ec, void __user *arg)
|
|
{
|
|
struct cros_ec_device *ec_dev = ec->ec_dev;
|
|
struct cros_ec_readmem s_mem = { };
|
|
long num;
|
|
|
|
/* Not every platform supports direct reads */
|
|
if (!ec_dev->cmd_readmem)
|
|
return -ENOTTY;
|
|
|
|
if (copy_from_user(&s_mem, arg, sizeof(s_mem)))
|
|
return -EFAULT;
|
|
|
|
num = ec_dev->cmd_readmem(ec_dev, s_mem.offset, s_mem.bytes,
|
|
s_mem.buffer);
|
|
if (num <= 0)
|
|
return num;
|
|
|
|
if (copy_to_user((void __user *)arg, &s_mem, sizeof(s_mem)))
|
|
return -EFAULT;
|
|
|
|
return num;
|
|
}
|
|
|
|
static long ec_device_ioctl(struct file *filp, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct cros_ec_dev *ec = filp->private_data;
|
|
|
|
if (_IOC_TYPE(cmd) != CROS_EC_DEV_IOC)
|
|
return -ENOTTY;
|
|
|
|
switch (cmd) {
|
|
case CROS_EC_DEV_IOCXCMD:
|
|
return ec_device_ioctl_xcmd(ec, (void __user *)arg);
|
|
case CROS_EC_DEV_IOCRDMEM:
|
|
return ec_device_ioctl_readmem(ec, (void __user *)arg);
|
|
}
|
|
|
|
return -ENOTTY;
|
|
}
|
|
|
|
/* Module initialization */
|
|
static const struct file_operations fops = {
|
|
.open = ec_device_open,
|
|
.release = ec_device_release,
|
|
.read = ec_device_read,
|
|
.unlocked_ioctl = ec_device_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ec_device_ioctl,
|
|
#endif
|
|
};
|
|
|
|
static void cros_ec_class_release(struct device *dev)
|
|
{
|
|
kfree(to_cros_ec_dev(dev));
|
|
}
|
|
|
|
static void cros_ec_sensors_register(struct cros_ec_dev *ec)
|
|
{
|
|
/*
|
|
* Issue a command to get the number of sensor reported.
|
|
* Build an array of sensors driver and register them all.
|
|
*/
|
|
int ret, i, id, sensor_num;
|
|
struct mfd_cell *sensor_cells;
|
|
struct cros_ec_sensor_platform *sensor_platforms;
|
|
int sensor_type[MOTIONSENSE_TYPE_MAX];
|
|
struct ec_params_motion_sense *params;
|
|
struct ec_response_motion_sense *resp;
|
|
struct cros_ec_command *msg;
|
|
|
|
msg = kzalloc(sizeof(struct cros_ec_command) +
|
|
max(sizeof(*params), sizeof(*resp)), GFP_KERNEL);
|
|
if (msg == NULL)
|
|
return;
|
|
|
|
msg->version = 2;
|
|
msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
|
|
msg->outsize = sizeof(*params);
|
|
msg->insize = sizeof(*resp);
|
|
|
|
params = (struct ec_params_motion_sense *)msg->data;
|
|
params->cmd = MOTIONSENSE_CMD_DUMP;
|
|
|
|
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
|
|
if (ret < 0 || msg->result != EC_RES_SUCCESS) {
|
|
dev_warn(ec->dev, "cannot get EC sensor information: %d/%d\n",
|
|
ret, msg->result);
|
|
goto error;
|
|
}
|
|
|
|
resp = (struct ec_response_motion_sense *)msg->data;
|
|
sensor_num = resp->dump.sensor_count;
|
|
/*
|
|
* Allocate 2 extra sensors if lid angle sensor and/or FIFO are needed.
|
|
*/
|
|
sensor_cells = kcalloc(sensor_num + 2, sizeof(struct mfd_cell),
|
|
GFP_KERNEL);
|
|
if (sensor_cells == NULL)
|
|
goto error;
|
|
|
|
sensor_platforms = kcalloc(sensor_num,
|
|
sizeof(struct cros_ec_sensor_platform),
|
|
GFP_KERNEL);
|
|
if (sensor_platforms == NULL)
|
|
goto error_platforms;
|
|
|
|
memset(sensor_type, 0, sizeof(sensor_type));
|
|
id = 0;
|
|
for (i = 0; i < sensor_num; i++) {
|
|
params->cmd = MOTIONSENSE_CMD_INFO;
|
|
params->info.sensor_num = i;
|
|
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
|
|
if (ret < 0 || msg->result != EC_RES_SUCCESS) {
|
|
dev_warn(ec->dev, "no info for EC sensor %d : %d/%d\n",
|
|
i, ret, msg->result);
|
|
continue;
|
|
}
|
|
switch (resp->info.type) {
|
|
case MOTIONSENSE_TYPE_ACCEL:
|
|
sensor_cells[id].name = "cros-ec-accel";
|
|
break;
|
|
case MOTIONSENSE_TYPE_BARO:
|
|
sensor_cells[id].name = "cros-ec-baro";
|
|
break;
|
|
case MOTIONSENSE_TYPE_GYRO:
|
|
sensor_cells[id].name = "cros-ec-gyro";
|
|
break;
|
|
case MOTIONSENSE_TYPE_MAG:
|
|
sensor_cells[id].name = "cros-ec-mag";
|
|
break;
|
|
case MOTIONSENSE_TYPE_PROX:
|
|
sensor_cells[id].name = "cros-ec-prox";
|
|
break;
|
|
case MOTIONSENSE_TYPE_LIGHT:
|
|
sensor_cells[id].name = "cros-ec-light";
|
|
break;
|
|
case MOTIONSENSE_TYPE_ACTIVITY:
|
|
sensor_cells[id].name = "cros-ec-activity";
|
|
break;
|
|
default:
|
|
dev_warn(ec->dev, "unknown type %d\n", resp->info.type);
|
|
continue;
|
|
}
|
|
sensor_platforms[id].sensor_num = i;
|
|
sensor_cells[id].id = sensor_type[resp->info.type];
|
|
sensor_cells[id].platform_data = &sensor_platforms[id];
|
|
sensor_cells[id].pdata_size =
|
|
sizeof(struct cros_ec_sensor_platform);
|
|
|
|
sensor_type[resp->info.type]++;
|
|
id++;
|
|
}
|
|
|
|
if (sensor_type[MOTIONSENSE_TYPE_ACCEL] >= 2)
|
|
ec->has_kb_wake_angle = true;
|
|
|
|
if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
|
|
sensor_cells[id].name = "cros-ec-ring";
|
|
id++;
|
|
}
|
|
if (cros_ec_check_features(ec,
|
|
EC_FEATURE_REFINED_TABLET_MODE_HYSTERESIS)) {
|
|
sensor_cells[id].name = "cros-ec-lid-angle";
|
|
id++;
|
|
}
|
|
|
|
ret = mfd_add_devices(ec->dev, 0, sensor_cells, id,
|
|
NULL, 0, NULL);
|
|
if (ret)
|
|
dev_err(ec->dev, "failed to add EC sensors\n");
|
|
|
|
kfree(sensor_platforms);
|
|
error_platforms:
|
|
kfree(sensor_cells);
|
|
error:
|
|
kfree(msg);
|
|
}
|
|
|
|
static struct cros_ec_sensor_platform sensor_platforms[] = {
|
|
{ .sensor_num = 0 },
|
|
{ .sensor_num = 1 }
|
|
};
|
|
|
|
static const struct mfd_cell cros_ec_accel_legacy_cells[] = {
|
|
{
|
|
.name = "cros-ec-accel-legacy",
|
|
.platform_data = &sensor_platforms[0],
|
|
.pdata_size = sizeof(struct cros_ec_sensor_platform),
|
|
},
|
|
{
|
|
.name = "cros-ec-accel-legacy",
|
|
.platform_data = &sensor_platforms[1],
|
|
.pdata_size = sizeof(struct cros_ec_sensor_platform),
|
|
}
|
|
};
|
|
|
|
static void cros_ec_accel_legacy_register(struct cros_ec_dev *ec)
|
|
{
|
|
struct cros_ec_device *ec_dev = ec->ec_dev;
|
|
u8 status;
|
|
int ret;
|
|
|
|
/*
|
|
* ECs that need legacy support are the main EC, directly connected to
|
|
* the AP.
|
|
*/
|
|
if (ec->cmd_offset != 0)
|
|
return;
|
|
|
|
/*
|
|
* Check if EC supports direct memory reads and if EC has
|
|
* accelerometers.
|
|
*/
|
|
if (ec_dev->cmd_readmem) {
|
|
ret = ec_dev->cmd_readmem(ec_dev, EC_MEMMAP_ACC_STATUS, 1,
|
|
&status);
|
|
if (ret < 0) {
|
|
dev_warn(ec->dev, "EC direct read error.\n");
|
|
return;
|
|
}
|
|
|
|
/* Check if EC has accelerometers. */
|
|
if (!(status & EC_MEMMAP_ACC_STATUS_PRESENCE_BIT)) {
|
|
dev_info(ec->dev, "EC does not have accelerometers.\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The device may still support accelerometers:
|
|
* it would be an older ARM based device that do not suppor the
|
|
* EC_CMD_GET_FEATURES command.
|
|
*
|
|
* Register 2 accelerometers, we will fail in the IIO driver if there
|
|
* are no sensors.
|
|
*/
|
|
ret = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
|
|
cros_ec_accel_legacy_cells,
|
|
ARRAY_SIZE(cros_ec_accel_legacy_cells),
|
|
NULL, 0, NULL);
|
|
if (ret)
|
|
dev_err(ec_dev->dev, "failed to add EC sensors\n");
|
|
}
|
|
|
|
static const struct mfd_cell cros_ec_cec_cells[] = {
|
|
{ .name = "cros-ec-cec" }
|
|
};
|
|
|
|
static const struct mfd_cell cros_ec_rtc_cells[] = {
|
|
{ .name = "cros-ec-rtc" }
|
|
};
|
|
|
|
static const struct mfd_cell cros_usbpd_charger_cells[] = {
|
|
{ .name = "cros-usbpd-charger" },
|
|
{ .name = "cros-usbpd-logger" },
|
|
};
|
|
|
|
static const struct mfd_cell cros_ec_platform_cells[] = {
|
|
{ .name = "cros-ec-debugfs" },
|
|
{ .name = "cros-ec-lightbar" },
|
|
{ .name = "cros-ec-sysfs" },
|
|
};
|
|
|
|
static const struct mfd_cell cros_ec_vbc_cells[] = {
|
|
{ .name = "cros-ec-vbc" }
|
|
};
|
|
|
|
static int ec_device_probe(struct platform_device *pdev)
|
|
{
|
|
int retval = -ENOMEM;
|
|
struct device_node *node;
|
|
struct device *dev = &pdev->dev;
|
|
struct cros_ec_platform *ec_platform = dev_get_platdata(dev);
|
|
struct cros_ec_dev *ec = kzalloc(sizeof(*ec), GFP_KERNEL);
|
|
|
|
if (!ec)
|
|
return retval;
|
|
|
|
dev_set_drvdata(dev, ec);
|
|
ec->ec_dev = dev_get_drvdata(dev->parent);
|
|
ec->dev = dev;
|
|
ec->cmd_offset = ec_platform->cmd_offset;
|
|
ec->features[0] = -1U; /* Not cached yet */
|
|
ec->features[1] = -1U; /* Not cached yet */
|
|
device_initialize(&ec->class_dev);
|
|
cdev_init(&ec->cdev, &fops);
|
|
|
|
/* Check whether this is actually a Fingerprint MCU rather than an EC */
|
|
if (cros_ec_check_features(ec, EC_FEATURE_FINGERPRINT)) {
|
|
dev_info(dev, "CrOS Fingerprint MCU detected.\n");
|
|
/*
|
|
* Help userspace differentiating ECs from FP MCU,
|
|
* regardless of the probing order.
|
|
*/
|
|
ec_platform->ec_name = CROS_EC_DEV_FP_NAME;
|
|
}
|
|
|
|
/*
|
|
* Check whether this is actually an Integrated Sensor Hub (ISH)
|
|
* rather than an EC.
|
|
*/
|
|
if (cros_ec_check_features(ec, EC_FEATURE_ISH)) {
|
|
dev_info(dev, "CrOS ISH MCU detected.\n");
|
|
/*
|
|
* Help userspace differentiating ECs from ISH MCU,
|
|
* regardless of the probing order.
|
|
*/
|
|
ec_platform->ec_name = CROS_EC_DEV_ISH_NAME;
|
|
}
|
|
|
|
/* Check whether this is actually a Touchpad MCU rather than an EC */
|
|
if (cros_ec_check_features(ec, EC_FEATURE_TOUCHPAD)) {
|
|
dev_info(dev, "CrOS Touchpad MCU detected.\n");
|
|
/*
|
|
* Help userspace differentiating ECs from TP MCU,
|
|
* regardless of the probing order.
|
|
*/
|
|
ec_platform->ec_name = CROS_EC_DEV_TP_NAME;
|
|
}
|
|
|
|
/* Check whether this is actually a SCP rather than an EC. */
|
|
if (cros_ec_check_features(ec, EC_FEATURE_SCP)) {
|
|
dev_info(dev, "CrOS SCP MCU detected.\n");
|
|
/*
|
|
* Help userspace differentiating ECs from SCP,
|
|
* regardless of the probing order.
|
|
*/
|
|
ec_platform->ec_name = CROS_EC_DEV_SCP_NAME;
|
|
}
|
|
|
|
/*
|
|
* Add the class device
|
|
* Link to the character device for creating the /dev entry
|
|
* in devtmpfs.
|
|
*/
|
|
ec->class_dev.devt = MKDEV(ec_major, pdev->id);
|
|
ec->class_dev.class = &cros_class;
|
|
ec->class_dev.parent = dev;
|
|
ec->class_dev.release = cros_ec_class_release;
|
|
|
|
retval = dev_set_name(&ec->class_dev, "%s", ec_platform->ec_name);
|
|
if (retval) {
|
|
dev_err(dev, "dev_set_name failed => %d\n", retval);
|
|
goto failed;
|
|
}
|
|
|
|
/* check whether this EC is a sensor hub. */
|
|
if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
|
|
cros_ec_sensors_register(ec);
|
|
else
|
|
/* Workaroud for older EC firmware */
|
|
cros_ec_accel_legacy_register(ec);
|
|
|
|
/* Check whether this EC instance has CEC host command support */
|
|
if (cros_ec_check_features(ec, EC_FEATURE_CEC)) {
|
|
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
|
|
cros_ec_cec_cells,
|
|
ARRAY_SIZE(cros_ec_cec_cells),
|
|
NULL, 0, NULL);
|
|
if (retval)
|
|
dev_err(ec->dev,
|
|
"failed to add cros-ec-cec device: %d\n",
|
|
retval);
|
|
}
|
|
|
|
/* Check whether this EC instance has RTC host command support */
|
|
if (cros_ec_check_features(ec, EC_FEATURE_RTC)) {
|
|
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
|
|
cros_ec_rtc_cells,
|
|
ARRAY_SIZE(cros_ec_rtc_cells),
|
|
NULL, 0, NULL);
|
|
if (retval)
|
|
dev_err(ec->dev,
|
|
"failed to add cros-ec-rtc device: %d\n",
|
|
retval);
|
|
}
|
|
|
|
/* Check whether this EC instance has the PD charge manager */
|
|
if (cros_ec_check_features(ec, EC_FEATURE_USB_PD)) {
|
|
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
|
|
cros_usbpd_charger_cells,
|
|
ARRAY_SIZE(cros_usbpd_charger_cells),
|
|
NULL, 0, NULL);
|
|
if (retval)
|
|
dev_err(ec->dev,
|
|
"failed to add cros-usbpd-charger device: %d\n",
|
|
retval);
|
|
}
|
|
|
|
/* We can now add the sysfs class, we know which parameter to show */
|
|
retval = cdev_device_add(&ec->cdev, &ec->class_dev);
|
|
if (retval) {
|
|
dev_err(dev, "cdev_device_add failed => %d\n", retval);
|
|
goto failed;
|
|
}
|
|
|
|
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
|
|
cros_ec_platform_cells,
|
|
ARRAY_SIZE(cros_ec_platform_cells),
|
|
NULL, 0, NULL);
|
|
if (retval)
|
|
dev_warn(ec->dev,
|
|
"failed to add cros-ec platform devices: %d\n",
|
|
retval);
|
|
|
|
/* Check whether this EC instance has a VBC NVRAM */
|
|
node = ec->ec_dev->dev->of_node;
|
|
if (of_property_read_bool(node, "google,has-vbc-nvram")) {
|
|
retval = mfd_add_devices(ec->dev, PLATFORM_DEVID_AUTO,
|
|
cros_ec_vbc_cells,
|
|
ARRAY_SIZE(cros_ec_vbc_cells),
|
|
NULL, 0, NULL);
|
|
if (retval)
|
|
dev_warn(ec->dev, "failed to add VBC devices: %d\n",
|
|
retval);
|
|
}
|
|
|
|
return 0;
|
|
|
|
failed:
|
|
put_device(&ec->class_dev);
|
|
return retval;
|
|
}
|
|
|
|
static int ec_device_remove(struct platform_device *pdev)
|
|
{
|
|
struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);
|
|
|
|
mfd_remove_devices(ec->dev);
|
|
cdev_del(&ec->cdev);
|
|
device_unregister(&ec->class_dev);
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id cros_ec_id[] = {
|
|
{ DRV_NAME, 0 },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, cros_ec_id);
|
|
|
|
static struct platform_driver cros_ec_dev_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
},
|
|
.id_table = cros_ec_id,
|
|
.probe = ec_device_probe,
|
|
.remove = ec_device_remove,
|
|
};
|
|
|
|
static int __init cros_ec_dev_init(void)
|
|
{
|
|
int ret;
|
|
dev_t dev = 0;
|
|
|
|
ret = class_register(&cros_class);
|
|
if (ret) {
|
|
pr_err(CROS_EC_DEV_NAME ": failed to register device class\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Get a range of minor numbers (starting with 0) to work with */
|
|
ret = alloc_chrdev_region(&dev, 0, CROS_MAX_DEV, CROS_EC_DEV_NAME);
|
|
if (ret < 0) {
|
|
pr_err(CROS_EC_DEV_NAME ": alloc_chrdev_region() failed\n");
|
|
goto failed_chrdevreg;
|
|
}
|
|
ec_major = MAJOR(dev);
|
|
|
|
/* Register the driver */
|
|
ret = platform_driver_register(&cros_ec_dev_driver);
|
|
if (ret < 0) {
|
|
pr_warn(CROS_EC_DEV_NAME ": can't register driver: %d\n", ret);
|
|
goto failed_devreg;
|
|
}
|
|
return 0;
|
|
|
|
failed_devreg:
|
|
unregister_chrdev_region(MKDEV(ec_major, 0), CROS_MAX_DEV);
|
|
failed_chrdevreg:
|
|
class_unregister(&cros_class);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit cros_ec_dev_exit(void)
|
|
{
|
|
platform_driver_unregister(&cros_ec_dev_driver);
|
|
unregister_chrdev(ec_major, CROS_EC_DEV_NAME);
|
|
class_unregister(&cros_class);
|
|
}
|
|
|
|
module_init(cros_ec_dev_init);
|
|
module_exit(cros_ec_dev_exit);
|
|
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|
|
MODULE_AUTHOR("Bill Richardson <wfrichar@chromium.org>");
|
|
MODULE_DESCRIPTION("Userspace interface to the Chrome OS Embedded Controller");
|
|
MODULE_VERSION("1.0");
|
|
MODULE_LICENSE("GPL");
|