static int get_next_event(struct cros_ec_device *ec_dev)
{
u8 buffer[sizeof(struct cros_ec_command) + sizeof(ec_dev->event_data)];
struct cros_ec_command *msg = (struct cros_ec_command *)&buffer;
int ret;
if (ec_dev->suspended) {
dev_dbg(ec_dev->dev, "Device suspended.\n");
return -EHOSTDOWN;
}
msg->version = 0;
msg->command = EC_CMD_GET_NEXT_EVENT;
msg->insize = sizeof(ec_dev->event_data);
msg->outsize = 0;
ret = cros_ec_cmd_xfer(ec_dev, msg);
if (ret > 0) {
ec_dev->event_size = ret - 1;
memcpy(&ec_dev->event_data, msg->data,
sizeof(ec_dev->event_data));
}
return ret;
}
static int cros_ec_keyb_get_state(struct cros_ec_keyb *ckdev, uint8_t *kb_state)
{
int ret = 0;
struct cros_ec_command *msg;
msg = kmalloc(sizeof(*msg) + ckdev->cols, GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->version = 0;
msg->command = EC_CMD_MKBP_STATE;
msg->insize = ckdev->cols;
msg->outsize = 0;
ret = cros_ec_cmd_xfer(ckdev->ec, msg);
if (ret < 0) {
dev_err(ckdev->dev, "Error transferring EC message %d\n", ret);
goto exit;
}
memcpy(kb_state, msg->data, ckdev->cols);
exit:
kfree(msg);
return ret;
}
static ssize_t show_ec_flashinfo(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ec_response_flash_info *resp;
struct cros_ec_command msg = { 0 };
int ret;
struct cros_ec_device *ec = dev_get_drvdata(dev);
/* The flash info shouldn't ever change, but ask each time anyway. */
msg.command = EC_CMD_FLASH_INFO;
msg.insize = sizeof(*resp);
ret = cros_ec_cmd_xfer(ec, &msg);
if (ret < 0)
return ret;
if (msg.result != EC_RES_SUCCESS)
return scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg.result);
resp = (struct ec_response_flash_info *)msg.indata;
return scnprintf(buf, PAGE_SIZE,
"FlashSize %d\nWriteSize %d\n"
"EraseSize %d\nProtectSize %d\n",
resp->flash_size, resp->write_block_size,
resp->erase_block_size, resp->protect_block_size);
}
static ssize_t show_ec_flashinfo(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ec_response_flash_info resp;
struct cros_ec_command msg = { 0 };
int ret;
struct cros_ec_dev *ec = container_of(
dev, struct cros_ec_dev, class_dev);
/* The flash info shouldn't ever change, but ask each time anyway. */
msg.command = EC_CMD_FLASH_INFO + ec->cmd_offset;
msg.indata = (uint8_t *)&resp;
msg.insize = sizeof(resp);
ret = cros_ec_cmd_xfer(ec->ec_dev, &msg);
if (ret < 0)
return ret;
if (msg.result != EC_RES_SUCCESS)
return scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg.result);
return scnprintf(buf, PAGE_SIZE,
"FlashSize %d\nWriteSize %d\n"
"EraseSize %d\nProtectSize %d\n",
resp.flash_size, resp.write_block_size,
resp.erase_block_size, resp.protect_block_size);
}
static int cros_ec_get_host_command_version_mask(struct cros_ec_device *ec_dev,
u16 cmd, u32 *mask)
{
struct ec_params_get_cmd_versions *pver;
struct ec_response_get_cmd_versions *rver;
struct cros_ec_command *msg;
int ret;
msg = kmalloc(sizeof(*msg) + max(sizeof(*rver), sizeof(*pver)),
GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->version = 0;
msg->command = EC_CMD_GET_CMD_VERSIONS;
msg->insize = sizeof(*rver);
msg->outsize = sizeof(*pver);
pver = (struct ec_params_get_cmd_versions *)msg->data;
pver->cmd = cmd;
ret = cros_ec_cmd_xfer(ec_dev, msg);
if (ret > 0) {
rver = (struct ec_response_get_cmd_versions *)msg->data;
*mask = rver->version_mask;
}
kfree(msg);
return ret;
}
static ssize_t sequence_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ec_params_lightbar *param;
struct cros_ec_command *msg;
unsigned int num;
int ret, len;
struct cros_ec_dev *ec = container_of(dev,
struct cros_ec_dev, class_dev);
for (len = 0; len < count; len++)
if (!isalnum(buf[len]))
break;
for (num = 0; num < ARRAY_SIZE(seqname); num++)
if (!strncasecmp(seqname[num], buf, len))
break;
if (num >= ARRAY_SIZE(seqname)) {
ret = kstrtouint(buf, 0, &num);
if (ret)
return ret;
}
msg = alloc_lightbar_cmd_msg(ec);
if (!msg)
return -ENOMEM;
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_SEQ;
param->seq.num = num;
ret = lb_throttle();
if (ret)
goto exit;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
goto exit;
if (msg->result != EC_RES_SUCCESS) {
ret = -EINVAL;
goto exit;
}
ret = count;
exit:
kfree(msg);
return ret;
}
int cros_ec_cmd_xfer_status(struct cros_ec_device *ec_dev,
struct cros_ec_command *msg)
{
int ret;
ret = cros_ec_cmd_xfer(ec_dev, msg);
if (ret < 0) {
dev_err(ec_dev->dev, "Command xfer error (err:%d)\n", ret);
} else if (msg->result != EC_RES_SUCCESS) {
dev_dbg(ec_dev->dev, "Command result (err: %d)\n", msg->result);
return -EPROTO;
}
return ret;
}
static int get_lightbar_version(struct cros_ec_dev *ec,
uint32_t *ver_ptr, uint32_t *flg_ptr)
{
struct ec_params_lightbar *param;
struct ec_response_lightbar *resp;
struct cros_ec_command *msg;
int ret;
msg = alloc_lightbar_cmd_msg(ec);
if (!msg)
return 0;
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_VERSION;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0) {
ret = 0;
goto exit;
}
switch (msg->result) {
case EC_RES_INVALID_PARAM:
/* Pixel had no version command. */
if (ver_ptr)
*ver_ptr = 0;
if (flg_ptr)
*flg_ptr = 0;
ret = 1;
goto exit;
case EC_RES_SUCCESS:
resp = (struct ec_response_lightbar *)msg->data;
/* Future devices w/lightbars should implement this command */
if (ver_ptr)
*ver_ptr = resp->version.num;
if (flg_ptr)
*flg_ptr = resp->version.flags;
ret = 1;
goto exit;
}
/* Anything else (ie, EC_RES_INVALID_COMMAND) - no lightbar */
ret = 0;
exit:
kfree(msg);
return ret;
}
static int cros_ec_sleep_event(struct cros_ec_device *ec_dev, u8 sleep_event)
{
struct {
struct cros_ec_command msg;
struct ec_params_host_sleep_event req;
} __packed buf;
memset(&buf, 0, sizeof(buf));
buf.req.sleep_event = sleep_event;
buf.msg.command = EC_CMD_HOST_SLEEP_EVENT;
buf.msg.version = 0;
buf.msg.outsize = sizeof(buf.req);
return cros_ec_cmd_xfer(ec_dev, &buf.msg);
}
static int get_keyboard_state_event(struct cros_ec_device *ec_dev)
{
u8 buffer[sizeof(struct cros_ec_command) +
sizeof(ec_dev->event_data.data)];
struct cros_ec_command *msg = (struct cros_ec_command *)&buffer;
msg->version = 0;
msg->command = EC_CMD_MKBP_STATE;
msg->insize = sizeof(ec_dev->event_data.data);
msg->outsize = 0;
ec_dev->event_size = cros_ec_cmd_xfer(ec_dev, msg);
ec_dev->event_data.event_type = EC_MKBP_EVENT_KEY_MATRIX;
memcpy(&ec_dev->event_data.data, msg->data,
sizeof(ec_dev->event_data.data));
return ec_dev->event_size;
}
static ssize_t vboot_context_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t pos, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
class_dev);
struct cros_ec_device *ecdev = ec->ec_dev;
struct ec_params_vbnvcontext *params;
struct cros_ec_command *msg;
int err;
const size_t para_sz = sizeof(*params);
const size_t data_sz = sizeof(params->block);
/* Only write full values */
if (count != data_sz)
return -EINVAL;
msg = kmalloc(sizeof(*msg) + para_sz, GFP_KERNEL);
if (!msg)
return -ENOMEM;
params = (struct ec_params_vbnvcontext *)msg->data;
params->op = EC_VBNV_CONTEXT_OP_WRITE;
memcpy(params->block, buf, data_sz);
msg->version = EC_VER_VBNV_CONTEXT;
msg->command = EC_CMD_VBNV_CONTEXT;
msg->outsize = para_sz;
msg->insize = 0;
err = cros_ec_cmd_xfer(ecdev, msg);
if (err < 0) {
dev_err(dev, "Error sending write request: %d\n", err);
kfree(msg);
return err;
}
kfree(msg);
return data_sz;
}
static ssize_t sequence_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ec_params_lightbar *param;
struct ec_response_lightbar *resp;
struct cros_ec_command *msg;
int ret;
struct cros_ec_dev *ec = container_of(dev,
struct cros_ec_dev, class_dev);
msg = alloc_lightbar_cmd_msg(ec);
if (!msg)
return -ENOMEM;
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_GET_SEQ;
ret = lb_throttle();
if (ret)
goto exit;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
goto exit;
if (msg->result != EC_RES_SUCCESS) {
ret = scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg->result);
goto exit;
}
resp = (struct ec_response_lightbar *)msg->data;
if (resp->get_seq.num >= ARRAY_SIZE(seqname))
ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->get_seq.num);
else
ret = scnprintf(buf, PAGE_SIZE, "%s\n",
seqname[resp->get_seq.num]);
exit:
kfree(msg);
return ret;
}
static ssize_t vboot_context_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *att, char *buf,
loff_t pos, size_t count)
{
struct device *dev = container_of(kobj, struct device, kobj);
struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
class_dev);
struct cros_ec_device *ecdev = ec->ec_dev;
struct ec_params_vbnvcontext *params;
struct cros_ec_command *msg;
int err;
const size_t para_sz = sizeof(params->op);
const size_t resp_sz = sizeof(struct ec_response_vbnvcontext);
const size_t payload = max(para_sz, resp_sz);
msg = kmalloc(sizeof(*msg) + payload, GFP_KERNEL);
if (!msg)
return -ENOMEM;
/* NB: we only kmalloc()ated enough space for the op field */
params = (struct ec_params_vbnvcontext *)msg->data;
params->op = EC_VBNV_CONTEXT_OP_READ;
msg->version = EC_VER_VBNV_CONTEXT;
msg->command = EC_CMD_VBNV_CONTEXT;
msg->outsize = para_sz;
msg->insize = resp_sz;
err = cros_ec_cmd_xfer(ecdev, msg);
if (err < 0) {
dev_err(dev, "Error sending read request: %d\n", err);
kfree(msg);
return err;
}
memcpy(buf, msg->data, resp_sz);
kfree(msg);
return resp_sz;
}
static ssize_t brightness_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct ec_params_lightbar *param;
struct cros_ec_command *msg;
int ret;
unsigned int val;
struct cros_ec_dev *ec = container_of(dev,
struct cros_ec_dev, class_dev);
if (kstrtouint(buf, 0, &val))
return -EINVAL;
msg = alloc_lightbar_cmd_msg(ec);
if (!msg)
return -ENOMEM;
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_SET_BRIGHTNESS;
param->set_brightness.num = val;
ret = lb_throttle();
if (ret)
goto exit;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
goto exit;
if (msg->result != EC_RES_SUCCESS) {
ret = -EINVAL;
goto exit;
}
ret = count;
exit:
kfree(msg);
return ret;
}
static ssize_t show_ec_flashinfo(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ec_response_flash_info *resp;
struct cros_ec_command *msg;
int ret;
struct cros_ec_dev *ec = container_of(dev,
struct cros_ec_dev, class_dev);
msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
if (!msg)
return -ENOMEM;
/* The flash info shouldn't ever change, but ask each time anyway. */
msg->version = 0;
msg->command = EC_CMD_FLASH_INFO + 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) {
ret = scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg->result);
goto exit;
}
resp = (struct ec_response_flash_info *)msg->data;
ret = scnprintf(buf, PAGE_SIZE,
"FlashSize %d\nWriteSize %d\n"
"EraseSize %d\nProtectSize %d\n",
resp->flash_size, resp->write_block_size,
resp->erase_block_size, resp->protect_block_size);
exit:
kfree(msg);
return ret;
}
static ssize_t store_ec_reboot(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
static const struct {
const char * const str;
uint8_t cmd;
uint8_t flags;
} words[] = {
{"cancel", EC_REBOOT_CANCEL, 0},
{"ro", EC_REBOOT_JUMP_RO, 0},
{"rw", EC_REBOOT_JUMP_RW, 0},
{"cold", EC_REBOOT_COLD, 0},
{"disable-jump", EC_REBOOT_DISABLE_JUMP, 0},
{"hibernate", EC_REBOOT_HIBERNATE, 0},
{"at-shutdown", -1, EC_REBOOT_FLAG_ON_AP_SHUTDOWN},
};
struct ec_params_reboot_ec param;
struct cros_ec_command msg = { 0 };
int got_cmd = 0, offset = 0;
int i;
int ret;
struct cros_ec_dev *ec = container_of(
dev, struct cros_ec_dev, class_dev);
param.flags = 0;
while (1) {
/* Find word to start scanning */
while (buf[offset] & isspace(buf[offset]))
offset++;
if (!buf[offset])
break;
for (i = 0; i < ARRAY_SIZE(words); i++) {
if (!strncasecmp(words[i].str, buf+offset,
strlen(words[i].str))) {
if (words[i].flags) {
param.flags |= words[i].flags;
} else {
param.cmd = words[i].cmd;
got_cmd = 1;
}
break;
}
}
/* On to the next word, if any */
while (buf[offset] && !isspace(buf[offset]))
offset++;
}
if (!got_cmd)
return -EINVAL;
msg.command = EC_CMD_REBOOT_EC + ec->cmd_offset;
msg.outdata = (uint8_t *)¶m;
msg.outsize = sizeof(param);
ret = cros_ec_cmd_xfer(ec->ec_dev, &msg);
if (ret < 0)
return ret;
if (msg.result != EC_RES_SUCCESS) {
dev_dbg(&ec->class_dev, "EC result %d\n", msg.result);
return -EINVAL;
}
return count;
}
static ssize_t show_ec_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
static const char * const image_names[] = {"unknown", "RO", "RW"};
struct ec_response_get_version *r_ver;
struct ec_response_get_chip_info *r_chip;
struct ec_response_board_version *r_board;
struct cros_ec_command msg = { 0 };
int ret;
int count = 0;
struct cros_ec_device *ec = dev_get_drvdata(dev);
/* Get versions. RW may change. */
msg.command = EC_CMD_GET_VERSION;
msg.insize = sizeof(*r_ver);
ret = cros_ec_cmd_xfer(ec, &msg);
if (ret < 0)
return ret;
if (msg.result != EC_RES_SUCCESS)
return scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg.result);
r_ver = (struct ec_response_get_version *)msg.indata;
/* Strings should be null-terminated, but let's be sure. */
r_ver->version_string_ro[sizeof(r_ver->version_string_ro) - 1] = '\0';
r_ver->version_string_rw[sizeof(r_ver->version_string_rw) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"RO version: %s\n", r_ver->version_string_ro);
count += scnprintf(buf + count, PAGE_SIZE - count,
"RW version: %s\n", r_ver->version_string_rw);
count += scnprintf(buf + count, PAGE_SIZE - count,
"Firmware copy: %s\n",
(r_ver->current_image < ARRAY_SIZE(image_names) ?
image_names[r_ver->current_image] : "?"));
/* Get build info. */
msg.command = EC_CMD_GET_BUILD_INFO;
msg.insize = sizeof(msg.indata);
ret = cros_ec_cmd_xfer(ec, &msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: XFER ERROR %d\n", ret);
else if (msg.result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: EC error %d\n", msg.result);
else {
msg.indata[sizeof(msg.indata) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: %s\n", msg.indata);
}
/* Get chip info. */
msg.command = EC_CMD_GET_CHIP_INFO;
msg.insize = sizeof(*r_chip);
ret = cros_ec_cmd_xfer(ec, &msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip info: XFER ERROR %d\n", ret);
else if (msg.result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip info: EC error %d\n", msg.result);
else {
r_chip = (struct ec_response_get_chip_info *)msg.indata;
r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
r_chip->name[sizeof(r_chip->name) - 1] = '\0';
r_chip->revision[sizeof(r_chip->revision) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip vendor: %s\n", r_chip->vendor);
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip name: %s\n", r_chip->name);
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip revision: %s\n", r_chip->revision);
}
/* Get board version */
msg.command = EC_CMD_GET_BOARD_VERSION;
msg.insize = sizeof(*r_board);
ret = cros_ec_cmd_xfer(ec, &msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: XFER ERROR %d\n", ret);
else if (msg.result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: EC error %d\n", msg.result);
else {
r_board = (struct ec_response_board_version *)msg.indata;
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: %d\n",
r_board->board_version);
}
return count;
}
/*
* We expect numbers, and we'll keep reading until we find them, skipping over
* any whitespace (sysfs guarantees that the input is null-terminated). Every
* four numbers are sent to the lightbar as <LED,R,G,B>. We fail at the first
* parsing error, if we don't parse any numbers, or if we have numbers left
* over.
*/
static ssize_t led_rgb_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct ec_params_lightbar *param;
struct cros_ec_command *msg;
struct cros_ec_dev *ec = container_of(dev,
struct cros_ec_dev, class_dev);
unsigned int val[4];
int ret, i = 0, j = 0, ok = 0;
msg = alloc_lightbar_cmd_msg(ec);
if (!msg)
return -ENOMEM;
do {
/* Skip any whitespace */
while (*buf && isspace(*buf))
buf++;
if (!*buf)
break;
ret = sscanf(buf, "%i", &val[i++]);
if (ret == 0)
goto exit;
if (i == 4) {
param = (struct ec_params_lightbar *)msg->data;
param->cmd = LIGHTBAR_CMD_SET_RGB;
param->set_rgb.led = val[0];
param->set_rgb.red = val[1];
param->set_rgb.green = val[2];
param->set_rgb.blue = val[3];
/*
* Throttle only the first of every four transactions,
* so that the user can update all four LEDs at once.
*/
if ((j++ % 4) == 0) {
ret = lb_throttle();
if (ret)
goto exit;
}
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
goto exit;
if (msg->result != EC_RES_SUCCESS)
goto exit;
i = 0;
ok = 1;
}
/* Skip over the number we just read */
while (*buf && !isspace(*buf))
buf++;
} while (*buf);
exit:
kfree(msg);
return (ok && i == 0) ? count : -EINVAL;
}
static int cros_ec_keyb_get_state(struct cros_ec_keyb *ckdev, uint8_t *kb_state)
{
int ret;
struct cros_ec_command msg = {
.version = 0,
.command = EC_CMD_MKBP_STATE,
.outdata = NULL,
.outsize = 0,
.indata = kb_state,
.insize = ckdev->cols,
};
ret = cros_ec_cmd_xfer(ckdev->ec, &msg);
/* FIXME: This assumes msg.result == EC_RES_SUCCESS */
return ret;
}
static irqreturn_t cros_ec_keyb_irq(int irq, void *data)
{
struct cros_ec_keyb *ckdev = data;
struct cros_ec_device *ec = ckdev->ec;
int ret;
uint8_t kb_state[ckdev->cols];
if (device_may_wakeup(ec->dev))
pm_wakeup_event(ec->dev, 0);
ret = cros_ec_keyb_get_state(ckdev, kb_state);
if (ret >= 0)
cros_ec_keyb_process(ckdev, kb_state, ret);
else
dev_err(ec->dev, "failed to get keyboard state: %d\n", ret);
return IRQ_HANDLED;
}
static int cros_ec_keyb_open(struct input_dev *dev)
{
struct cros_ec_keyb *ckdev = input_get_drvdata(dev);
struct cros_ec_device *ec = ckdev->ec;
return request_threaded_irq(ec->irq, NULL, cros_ec_keyb_irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"cros_ec_keyb", ckdev);
}
static void cros_ec_keyb_close(struct input_dev *dev)
{
struct cros_ec_keyb *ckdev = input_get_drvdata(dev);
struct cros_ec_device *ec = ckdev->ec;
free_irq(ec->irq, ckdev);
}
/* Clear any keys in the buffer */
static void cros_ec_keyb_clear_keyboard(struct cros_ec_keyb *ckdev)
{
uint8_t old_state[ckdev->cols];
uint8_t new_state[ckdev->cols];
unsigned long duration;
int i, ret;
/*
* Keep reading until we see that the scan state does not change.
* That indicates that we are done.
*
* Assume that the EC keyscan buffer is at most 32 deep.
*/
duration = jiffies;
ret = cros_ec_keyb_get_state(ckdev, new_state);
for (i = 1; !ret && i < 32; i++) {
memcpy(old_state, new_state, sizeof(old_state));
ret = cros_ec_keyb_get_state(ckdev, new_state);
if (0 == memcmp(old_state, new_state, sizeof(old_state)))
break;
}
duration = jiffies - duration;
dev_info(ckdev->dev, "Discarded %d keyscan(s) in %dus\n", i,
jiffies_to_usecs(duration));
}
static ssize_t store_ec_reboot(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
static const struct {
const char * const str;
uint8_t cmd;
uint8_t flags;
} words[] = {
{"cancel", EC_REBOOT_CANCEL, 0},
{"ro", EC_REBOOT_JUMP_RO, 0},
{"rw", EC_REBOOT_JUMP_RW, 0},
{"cold", EC_REBOOT_COLD, 0},
{"disable-jump", EC_REBOOT_DISABLE_JUMP, 0},
{"hibernate", EC_REBOOT_HIBERNATE, 0},
{"at-shutdown", -1, EC_REBOOT_FLAG_ON_AP_SHUTDOWN},
};
struct cros_ec_command *msg;
struct ec_params_reboot_ec *param;
int got_cmd = 0, offset = 0;
int i;
int ret;
struct cros_ec_dev *ec = container_of(dev,
struct cros_ec_dev, class_dev);
msg = kmalloc(sizeof(*msg) + sizeof(*param), GFP_KERNEL);
if (!msg)
return -ENOMEM;
param = (struct ec_params_reboot_ec *)msg->data;
param->flags = 0;
while (1) {
/* Find word to start scanning */
while (buf[offset] && isspace(buf[offset]))
offset++;
if (!buf[offset])
break;
for (i = 0; i < ARRAY_SIZE(words); i++) {
if (!strncasecmp(words[i].str, buf+offset,
strlen(words[i].str))) {
if (words[i].flags) {
param->flags |= words[i].flags;
} else {
param->cmd = words[i].cmd;
got_cmd = 1;
}
break;
}
}
/* On to the next word, if any */
while (buf[offset] && !isspace(buf[offset]))
offset++;
}
if (!got_cmd) {
count = -EINVAL;
goto exit;
}
msg->version = 0;
msg->command = EC_CMD_REBOOT_EC + ec->cmd_offset;
msg->outsize = sizeof(*param);
msg->insize = 0;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0) {
count = ret;
goto exit;
}
if (msg->result != EC_RES_SUCCESS) {
dev_dbg(ec->dev, "EC result %d\n", msg->result);
count = -EINVAL;
}
exit:
kfree(msg);
return count;
}
static ssize_t show_ec_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
static const char * const image_names[] = {"unknown", "RO", "RW"};
struct ec_response_get_version *r_ver;
struct ec_response_get_chip_info *r_chip;
struct ec_response_board_version *r_board;
struct cros_ec_command *msg;
int ret;
int count = 0;
struct cros_ec_dev *ec = container_of(dev,
struct cros_ec_dev, class_dev);
msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
/* Get versions. RW may change. */
msg->version = 0;
msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
msg->insize = sizeof(*r_ver);
msg->outsize = 0;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0) {
count = ret;
goto exit;
}
if (msg->result != EC_RES_SUCCESS) {
count = scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg->result);
goto exit;
}
r_ver = (struct ec_response_get_version *)msg->data;
/* Strings should be null-terminated, but let's be sure. */
r_ver->version_string_ro[sizeof(r_ver->version_string_ro) - 1] = '\0';
r_ver->version_string_rw[sizeof(r_ver->version_string_rw) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"RO version: %s\n", r_ver->version_string_ro);
count += scnprintf(buf + count, PAGE_SIZE - count,
"RW version: %s\n", r_ver->version_string_rw);
count += scnprintf(buf + count, PAGE_SIZE - count,
"Firmware copy: %s\n",
(r_ver->current_image < ARRAY_SIZE(image_names) ?
image_names[r_ver->current_image] : "?"));
/* Get build info. */
msg->command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
msg->insize = EC_HOST_PARAM_SIZE;
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: XFER ERROR %d\n", ret);
else if (msg->result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: EC error %d\n", msg->result);
else {
msg->data[EC_HOST_PARAM_SIZE - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: %s\n", msg->data);
}
/* Get chip info. */
msg->command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
msg->insize = sizeof(*r_chip);
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip info: XFER ERROR %d\n", ret);
else if (msg->result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip info: EC error %d\n", msg->result);
else {
r_chip = (struct ec_response_get_chip_info *)msg->data;
r_chip->vendor[sizeof(r_chip->vendor) - 1] = '\0';
r_chip->name[sizeof(r_chip->name) - 1] = '\0';
r_chip->revision[sizeof(r_chip->revision) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip vendor: %s\n", r_chip->vendor);
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip name: %s\n", r_chip->name);
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip revision: %s\n", r_chip->revision);
}
/* Get board version */
msg->command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
msg->insize = sizeof(*r_board);
ret = cros_ec_cmd_xfer(ec->ec_dev, msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: XFER ERROR %d\n", ret);
else if (msg->result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: EC error %d\n", msg->result);
else {
r_board = (struct ec_response_board_version *)msg->data;
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: %d\n",
r_board->board_version);
}
exit:
kfree(msg);
return count;
}
static int cros_ec_keyb_get_state(struct cros_ec_keyb *ckdev, uint8_t *kb_state)
{
struct cros_ec_command msg = {
.version = 0,
.command = EC_CMD_MKBP_STATE,
.outdata = NULL,
.outsize = 0,
.indata = kb_state,
.insize = ckdev->cols,
};
return cros_ec_cmd_xfer(ckdev->ec, &msg);
}
static irqreturn_t cros_ec_keyb_irq(int irq, void *data)
{
struct cros_ec_keyb *ckdev = data;
struct cros_ec_device *ec = ckdev->ec;
int ret;
uint8_t kb_state[ckdev->cols];
if (device_may_wakeup(ec->dev))
pm_wakeup_event(ec->dev, 0);
ret = cros_ec_keyb_get_state(ckdev, kb_state);
if (ret >= 0)
cros_ec_keyb_process(ckdev, kb_state, ret);
else
dev_err(ec->dev, "failed to get keyboard state: %d\n", ret);
return IRQ_HANDLED;
}
static int cros_ec_keyb_open(struct input_dev *dev)
{
struct cros_ec_keyb *ckdev = input_get_drvdata(dev);
struct cros_ec_device *ec = ckdev->ec;
return request_threaded_irq(ec->irq, NULL, cros_ec_keyb_irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
"cros_ec_keyb", ckdev);
}
static void cros_ec_keyb_close(struct input_dev *dev)
{
struct cros_ec_keyb *ckdev = input_get_drvdata(dev);
struct cros_ec_device *ec = ckdev->ec;
free_irq(ec->irq, ckdev);
}
/*
* Walks keycodes flipping bit in buffer COLUMNS deep where bit is ROW. Used by
* ghosting logic to ignore NULL or virtual keys.
*/
static void cros_ec_keyb_compute_valid_keys(struct cros_ec_keyb *ckdev)
{
int row, col;
int row_shift = ckdev->row_shift;
unsigned short *keymap = ckdev->idev->keycode;
unsigned short code;
BUG_ON(ckdev->idev->keycodesize != sizeof(*keymap));
for (col = 0; col < ckdev->cols; col++) {
for (row = 0; row < ckdev->rows; row++) {
code = keymap[MATRIX_SCAN_CODE(row, col, row_shift)];
if (code && (code != KEY_BATTERY))
ckdev->valid_keys[col] |= 1 << row;
}
dev_dbg(ckdev->dev, "valid_keys[%02d] = 0x%02x\n",
col, ckdev->valid_keys[col]);
}
}
static ssize_t show_ec_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
static const char * const image_names[] = {"unknown", "RO", "RW"};
struct ec_response_get_version r_ver;
struct ec_response_get_chip_info r_chip;
struct ec_response_board_version r_board;
struct cros_ec_command msg = { 0 };
char r_build_string[EC_HOST_PARAM_SIZE];
int ret;
int count = 0;
struct cros_ec_dev *ec = container_of(
dev, struct cros_ec_dev, class_dev);
/* Get versions. RW may change. */
msg.command = EC_CMD_GET_VERSION + ec->cmd_offset;
msg.indata = (uint8_t *)&r_ver;
msg.insize = sizeof(r_ver);
ret = cros_ec_cmd_xfer(ec->ec_dev, &msg);
if (ret < 0)
return ret;
if (msg.result != EC_RES_SUCCESS)
return scnprintf(buf, PAGE_SIZE,
"ERROR: EC returned %d\n", msg.result);
/* Strings should be null-terminated, but let's be sure. */
r_ver.version_string_ro[sizeof(r_ver.version_string_ro) - 1] = '\0';
r_ver.version_string_rw[sizeof(r_ver.version_string_rw) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"RO version: %s\n", r_ver.version_string_ro);
count += scnprintf(buf + count, PAGE_SIZE - count,
"RW version: %s\n", r_ver.version_string_rw);
count += scnprintf(buf + count, PAGE_SIZE - count,
"Firmware copy: %s\n",
(r_ver.current_image < ARRAY_SIZE(image_names) ?
image_names[r_ver.current_image] : "?"));
/* Get build info. */
msg.command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
msg.indata = (uint8_t *)r_build_string;
msg.insize = sizeof(r_build_string);
ret = cros_ec_cmd_xfer(ec->ec_dev, &msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: XFER ERROR %d\n", ret);
else if (msg.result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: EC error %d\n", msg.result);
else {
r_build_string[sizeof(r_build_string) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"Build info: %s\n", r_build_string);
}
/* Get chip info. */
msg.command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
msg.indata = (uint8_t *)&r_chip;
msg.insize = sizeof(r_chip);
ret = cros_ec_cmd_xfer(ec->ec_dev, &msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip info: XFER ERROR %d\n", ret);
else if (msg.result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip info: EC error %d\n", msg.result);
else {
r_chip.vendor[sizeof(r_chip.vendor) - 1] = '\0';
r_chip.name[sizeof(r_chip.name) - 1] = '\0';
r_chip.revision[sizeof(r_chip.revision) - 1] = '\0';
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip vendor: %s\n", r_chip.vendor);
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip name: %s\n", r_chip.name);
count += scnprintf(buf + count, PAGE_SIZE - count,
"Chip revision: %s\n", r_chip.revision);
}
/* Get board version */
msg.command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
msg.indata = (uint8_t *)&r_board;
msg.insize = sizeof(r_board);
ret = cros_ec_cmd_xfer(ec->ec_dev, &msg);
if (ret < 0)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: XFER ERROR %d\n", ret);
else if (msg.result != EC_RES_SUCCESS)
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: EC error %d\n", msg.result);
else {
count += scnprintf(buf + count, PAGE_SIZE - count,
"Board version: %d\n",
r_board.board_version);
}
return count;
}
