#include <linux/mfd/cros_ec_commands.h>
int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,
- struct cros_ec_msg *msg)
+ struct cros_ec_command *msg)
{
uint8_t *out;
int csum, i;
- BUG_ON(msg->out_len > EC_HOST_PARAM_SIZE);
+ BUG_ON(msg->outsize > EC_PROTO2_MAX_PARAM_SIZE);
out = ec_dev->dout;
out[0] = EC_CMD_VERSION0 + msg->version;
- out[1] = msg->cmd;
- out[2] = msg->out_len;
+ out[1] = msg->command;
+ out[2] = msg->outsize;
csum = out[0] + out[1] + out[2];
- for (i = 0; i < msg->out_len; i++)
- csum += out[EC_MSG_TX_HEADER_BYTES + i] = msg->out_buf[i];
- out[EC_MSG_TX_HEADER_BYTES + msg->out_len] = (uint8_t)(csum & 0xff);
+ for (i = 0; i < msg->outsize; i++)
+ csum += out[EC_MSG_TX_HEADER_BYTES + i] = msg->outdata[i];
+ out[EC_MSG_TX_HEADER_BYTES + msg->outsize] = (uint8_t)(csum & 0xff);
- return EC_MSG_TX_PROTO_BYTES + msg->out_len;
+ return EC_MSG_TX_PROTO_BYTES + msg->outsize;
}
EXPORT_SYMBOL(cros_ec_prepare_tx);
-static int cros_ec_command_sendrecv(struct cros_ec_device *ec_dev,
- uint16_t cmd, void *out_buf, int out_len,
- void *in_buf, int in_len)
+int cros_ec_check_result(struct cros_ec_device *ec_dev,
+ struct cros_ec_command *msg)
{
- struct cros_ec_msg msg;
-
- msg.version = cmd >> 8;
- msg.cmd = cmd & 0xff;
- msg.out_buf = out_buf;
- msg.out_len = out_len;
- msg.in_buf = in_buf;
- msg.in_len = in_len;
-
- return ec_dev->command_xfer(ec_dev, &msg);
-}
-
-static int cros_ec_command_recv(struct cros_ec_device *ec_dev,
- uint16_t cmd, void *buf, int buf_len)
-{
- return cros_ec_command_sendrecv(ec_dev, cmd, NULL, 0, buf, buf_len);
-}
-
-static int cros_ec_command_send(struct cros_ec_device *ec_dev,
- uint16_t cmd, void *buf, int buf_len)
-{
- return cros_ec_command_sendrecv(ec_dev, cmd, buf, buf_len, NULL, 0);
-}
-
-static irqreturn_t ec_irq_thread(int irq, void *data)
-{
- struct cros_ec_device *ec_dev = data;
-
- if (device_may_wakeup(ec_dev->dev))
- pm_wakeup_event(ec_dev->dev, 0);
-
- blocking_notifier_call_chain(&ec_dev->event_notifier, 1, ec_dev);
-
- return IRQ_HANDLED;
+ switch (msg->result) {
+ case EC_RES_SUCCESS:
+ return 0;
+ case EC_RES_IN_PROGRESS:
+ dev_dbg(ec_dev->dev, "command 0x%02x in progress\n",
+ msg->command);
+ return -EAGAIN;
+ default:
+ dev_dbg(ec_dev->dev, "command 0x%02x returned %d\n",
+ msg->command, msg->result);
+ return 0;
+ }
}
+EXPORT_SYMBOL(cros_ec_check_result);
static const struct mfd_cell cros_devs[] = {
{
.id = 1,
.of_compatible = "google,cros-ec-keyb",
},
+ {
+ .name = "cros-ec-i2c-tunnel",
+ .id = 2,
+ .of_compatible = "google,cros-ec-i2c-tunnel",
+ },
};
int cros_ec_register(struct cros_ec_device *ec_dev)
struct device *dev = ec_dev->dev;
int err = 0;
- BLOCKING_INIT_NOTIFIER_HEAD(&ec_dev->event_notifier);
-
- ec_dev->command_send = cros_ec_command_send;
- ec_dev->command_recv = cros_ec_command_recv;
- ec_dev->command_sendrecv = cros_ec_command_sendrecv;
-
if (ec_dev->din_size) {
ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL);
if (!ec_dev->din)
return -ENOMEM;
}
- if (!ec_dev->irq) {
- dev_dbg(dev, "no valid IRQ: %d\n", ec_dev->irq);
- return err;
- }
-
- err = request_threaded_irq(ec_dev->irq, NULL, ec_irq_thread,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
- "chromeos-ec", ec_dev);
- if (err) {
- dev_err(dev, "request irq %d: error %d\n", ec_dev->irq, err);
- return err;
- }
-
err = mfd_add_devices(dev, 0, cros_devs,
ARRAY_SIZE(cros_devs),
NULL, ec_dev->irq, NULL);
if (err) {
dev_err(dev, "failed to add mfd devices\n");
- goto fail_mfd;
+ return err;
}
- dev_info(dev, "Chrome EC (%s)\n", ec_dev->name);
+ dev_info(dev, "Chrome EC device registered\n");
return 0;
-
-fail_mfd:
- free_irq(ec_dev->irq, ec_dev);
-
- return err;
}
EXPORT_SYMBOL(cros_ec_register);
int cros_ec_remove(struct cros_ec_device *ec_dev)
{
mfd_remove_devices(ec_dev->dev);
- free_irq(ec_dev->irq, ec_dev);
return 0;
}