* Chromium OS cros_ec driver
*
* Copyright (c) 2012 The Chromium OS Authors.
- * See file CREDITS for list of people who contributed to this
- * project.
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
/*
- * The Matrix Keyboard Protocol driver handles talking to the keyboard
- * controller chip. Mostly this is for keyboard functions, but some other
- * things have slipped in, so we provide generic services to talk to the
- * KBC.
+ * This is the interface to the Chrome OS EC. It provides keyboard functions,
+ * power control and battery management. Quite a few other functions are
+ * provided to enable the EC software to be updated, talk to the EC's I2C bus
+ * and store a small amount of data in a memory which persists while the EC
+ * is not reset.
*/
#include <common.h>
#include <command.h>
+#include <dm.h>
#include <i2c.h>
#include <cros_ec.h>
#include <fdtdec.h>
#include <malloc.h>
#include <spi.h>
+#include <asm/errno.h>
#include <asm/io.h>
#include <asm-generic/gpio.h>
+#include <dm/device-internal.h>
+#include <dm/uclass-internal.h>
#ifdef DEBUG_TRACE
#define debug_trace(fmt, b...) debug(fmt, #b)
CROS_EC_CMD_HASH_TIMEOUT_MS = 2000,
};
-static struct cros_ec_dev static_dev, *last_dev;
-
DECLARE_GLOBAL_DATA_PTR;
/* Note: depends on enum ec_current_image */
return csum & 0xff;
}
+/**
+ * Create a request packet for protocol version 3.
+ *
+ * The packet is stored in the device's internal output buffer.
+ *
+ * @param dev CROS-EC device
+ * @param cmd Command to send (EC_CMD_...)
+ * @param cmd_version Version of command to send (EC_VER_...)
+ * @param dout Output data (may be NULL If dout_len=0)
+ * @param dout_len Size of output data in bytes
+ * @return packet size in bytes, or <0 if error.
+ */
+static int create_proto3_request(struct cros_ec_dev *dev,
+ int cmd, int cmd_version,
+ const void *dout, int dout_len)
+{
+ struct ec_host_request *rq = (struct ec_host_request *)dev->dout;
+ int out_bytes = dout_len + sizeof(*rq);
+
+ /* Fail if output size is too big */
+ if (out_bytes > (int)sizeof(dev->dout)) {
+ debug("%s: Cannot send %d bytes\n", __func__, dout_len);
+ return -EC_RES_REQUEST_TRUNCATED;
+ }
+
+ /* Fill in request packet */
+ rq->struct_version = EC_HOST_REQUEST_VERSION;
+ rq->checksum = 0;
+ rq->command = cmd;
+ rq->command_version = cmd_version;
+ rq->reserved = 0;
+ rq->data_len = dout_len;
+
+ /* Copy data after header */
+ memcpy(rq + 1, dout, dout_len);
+
+ /* Write checksum field so the entire packet sums to 0 */
+ rq->checksum = (uint8_t)(-cros_ec_calc_checksum(dev->dout, out_bytes));
+
+ cros_ec_dump_data("out", cmd, dev->dout, out_bytes);
+
+ /* Return size of request packet */
+ return out_bytes;
+}
+
+/**
+ * Prepare the device to receive a protocol version 3 response.
+ *
+ * @param dev CROS-EC device
+ * @param din_len Maximum size of response in bytes
+ * @return maximum expected number of bytes in response, or <0 if error.
+ */
+static int prepare_proto3_response_buffer(struct cros_ec_dev *dev, int din_len)
+{
+ int in_bytes = din_len + sizeof(struct ec_host_response);
+
+ /* Fail if input size is too big */
+ if (in_bytes > (int)sizeof(dev->din)) {
+ debug("%s: Cannot receive %d bytes\n", __func__, din_len);
+ return -EC_RES_RESPONSE_TOO_BIG;
+ }
+
+ /* Return expected size of response packet */
+ return in_bytes;
+}
+
+/**
+ * Handle a protocol version 3 response packet.
+ *
+ * The packet must already be stored in the device's internal input buffer.
+ *
+ * @param dev CROS-EC device
+ * @param dinp Returns pointer to response data
+ * @param din_len Maximum size of response in bytes
+ * @return number of bytes of response data, or <0 if error. Note that error
+ * codes can be from errno.h or -ve EC_RES_INVALID_CHECKSUM values (and they
+ * overlap!)
+ */
+static int handle_proto3_response(struct cros_ec_dev *dev,
+ uint8_t **dinp, int din_len)
+{
+ struct ec_host_response *rs = (struct ec_host_response *)dev->din;
+ int in_bytes;
+ int csum;
+
+ cros_ec_dump_data("in-header", -1, dev->din, sizeof(*rs));
+
+ /* Check input data */
+ if (rs->struct_version != EC_HOST_RESPONSE_VERSION) {
+ debug("%s: EC response version mismatch\n", __func__);
+ return -EC_RES_INVALID_RESPONSE;
+ }
+
+ if (rs->reserved) {
+ debug("%s: EC response reserved != 0\n", __func__);
+ return -EC_RES_INVALID_RESPONSE;
+ }
+
+ if (rs->data_len > din_len) {
+ debug("%s: EC returned too much data\n", __func__);
+ return -EC_RES_RESPONSE_TOO_BIG;
+ }
+
+ cros_ec_dump_data("in-data", -1, dev->din + sizeof(*rs), rs->data_len);
+
+ /* Update in_bytes to actual data size */
+ in_bytes = sizeof(*rs) + rs->data_len;
+
+ /* Verify checksum */
+ csum = cros_ec_calc_checksum(dev->din, in_bytes);
+ if (csum) {
+ debug("%s: EC response checksum invalid: 0x%02x\n", __func__,
+ csum);
+ return -EC_RES_INVALID_CHECKSUM;
+ }
+
+ /* Return error result, if any */
+ if (rs->result)
+ return -(int)rs->result;
+
+ /* If we're still here, set response data pointer and return length */
+ *dinp = (uint8_t *)(rs + 1);
+
+ return rs->data_len;
+}
+
+static int send_command_proto3(struct cros_ec_dev *dev,
+ int cmd, int cmd_version,
+ const void *dout, int dout_len,
+ uint8_t **dinp, int din_len)
+{
+ struct dm_cros_ec_ops *ops;
+ int out_bytes, in_bytes;
+ int rv;
+
+ /* Create request packet */
+ out_bytes = create_proto3_request(dev, cmd, cmd_version,
+ dout, dout_len);
+ if (out_bytes < 0)
+ return out_bytes;
+
+ /* Prepare response buffer */
+ in_bytes = prepare_proto3_response_buffer(dev, din_len);
+ if (in_bytes < 0)
+ return in_bytes;
+
+ ops = dm_cros_ec_get_ops(dev->dev);
+ rv = ops->packet ? ops->packet(dev->dev, out_bytes, in_bytes) : -ENOSYS;
+ if (rv < 0)
+ return rv;
+
+ /* Process the response */
+ return handle_proto3_response(dev, dinp, din_len);
+}
+
static int send_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
const void *dout, int dout_len,
uint8_t **dinp, int din_len)
{
- int ret;
+ struct dm_cros_ec_ops *ops;
+ int ret = -1;
- switch (dev->interface) {
-#ifdef CONFIG_CROS_EC_SPI
- case CROS_EC_IF_SPI:
- ret = cros_ec_spi_command(dev, cmd, cmd_version,
- (const uint8_t *)dout, dout_len,
- dinp, din_len);
- break;
-#endif
-#ifdef CONFIG_CROS_EC_I2C
- case CROS_EC_IF_I2C:
- ret = cros_ec_i2c_command(dev, cmd, cmd_version,
- (const uint8_t *)dout, dout_len,
- dinp, din_len);
- break;
-#endif
-#ifdef CONFIG_CROS_EC_LPC
- case CROS_EC_IF_LPC:
- ret = cros_ec_lpc_command(dev, cmd, cmd_version,
- (const uint8_t *)dout, dout_len,
- dinp, din_len);
- break;
-#endif
- case CROS_EC_IF_NONE:
- default:
- ret = -1;
+ /* Handle protocol version 3 support */
+ if (dev->protocol_version == 3) {
+ return send_command_proto3(dev, cmd, cmd_version,
+ dout, dout_len, dinp, din_len);
}
+ ops = dm_cros_ec_get_ops(dev->dev);
+ ret = ops->command(dev->dev, cmd, cmd_version,
+ (const uint8_t *)dout, dout_len, dinp, din_len);
+
return ret;
}
* If not NULL, it will be updated to point to the data
* and will always be double word aligned (64-bits)
* @param din_len Maximum size of response in bytes
- * @return number of bytes in response, or -1 on error
+ * @return number of bytes in response, or -ve on error
*/
static int ec_command_inptr(struct cros_ec_dev *dev, uint8_t cmd,
int cmd_version, const void *dout, int dout_len, uint8_t **dinp,
int din_len)
{
- uint8_t *din;
+ uint8_t *din = NULL;
int len;
- if (cmd_version != 0 && !dev->cmd_version_is_supported) {
- debug("%s: Command version >0 unsupported\n", __func__);
- return -1;
- }
len = send_command(dev, cmd, cmd_version, dout, dout_len,
&din, din_len);
/* If the command doesn't complete, wait a while */
if (len == -EC_RES_IN_PROGRESS) {
- struct ec_response_get_comms_status *resp;
+ struct ec_response_get_comms_status *resp = NULL;
ulong start;
/* Wait for command to complete */
NULL, 0, &din, din_len);
}
- debug("%s: len=%d, dinp=%p, *dinp=%p\n", __func__, len, dinp, *dinp);
+ debug("%s: len=%d, dinp=%p, *dinp=%p\n", __func__, len, dinp,
+ dinp ? *dinp : NULL);
if (dinp) {
/* If we have any data to return, it must be 64bit-aligned */
assert(len <= 0 || !((uintptr_t)din & 7));
* It not NULL, it is a place for ec_command() to copy the
* data to.
* @param din_len Maximum size of response in bytes
- * @return number of bytes in response, or -1 on error
+ * @return number of bytes in response, or -ve on error
*/
static int ec_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
const void *dout, int dout_len,
return len;
}
-int cros_ec_scan_keyboard(struct cros_ec_dev *dev, struct mbkp_keyscan *scan)
+int cros_ec_scan_keyboard(struct udevice *dev, struct mbkp_keyscan *scan)
{
- if (ec_command(dev, EC_CMD_CROS_EC_STATE, 0, NULL, 0, scan,
- sizeof(scan->data)) < sizeof(scan->data))
+ struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
+
+ if (ec_command(cdev, EC_CMD_MKBP_STATE, 0, NULL, 0, scan,
+ sizeof(scan->data)) != sizeof(scan->data))
return -1;
return 0;
struct ec_response_get_version *r;
if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
- (uint8_t **)&r, sizeof(*r)) < sizeof(*r))
+ (uint8_t **)&r, sizeof(*r)) != sizeof(*r))
return -1;
- if (maxlen > sizeof(r->version_string_ro))
+ if (maxlen > (int)sizeof(r->version_string_ro))
maxlen = sizeof(r->version_string_ro);
switch (r->current_image) {
{
if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
(uint8_t **)versionp, sizeof(**versionp))
- < sizeof(**versionp))
+ != sizeof(**versionp))
return -1;
return 0;
int cros_ec_read_build_info(struct cros_ec_dev *dev, char **strp)
{
if (ec_command_inptr(dev, EC_CMD_GET_BUILD_INFO, 0, NULL, 0,
- (uint8_t **)strp, EC_HOST_PARAM_SIZE) < 0)
+ (uint8_t **)strp, EC_PROTO2_MAX_PARAM_SIZE) < 0)
return -1;
return 0;
struct ec_response_get_version *r;
if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
- (uint8_t **)&r, sizeof(*r)) < sizeof(*r))
+ (uint8_t **)&r, sizeof(*r)) != sizeof(*r))
return -1;
*image = r->current_image;
debug("%s: No valid hash (status=%d size=%d). Compute one...\n",
__func__, hash->status, hash->size);
- p.cmd = EC_VBOOT_HASH_RECALC;
+ p.cmd = EC_VBOOT_HASH_START;
p.hash_type = EC_VBOOT_HASH_TYPE_SHA256;
p.nonce_size = 0;
p.offset = EC_VBOOT_HASH_OFFSET_RW;
return 0;
}
-int cros_ec_interrupt_pending(struct cros_ec_dev *dev)
+int cros_ec_interrupt_pending(struct udevice *dev)
{
+ struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
+
/* no interrupt support : always poll */
- if (!fdt_gpio_isvalid(&dev->ec_int))
- return 1;
+ if (!dm_gpio_is_valid(&cdev->ec_int))
+ return -ENOENT;
- return !gpio_get_value(dev->ec_int.gpio);
+ return dm_gpio_get_value(&cdev->ec_int);
}
-int cros_ec_info(struct cros_ec_dev *dev, struct ec_response_cros_ec_info *info)
+int cros_ec_info(struct cros_ec_dev *dev, struct ec_response_mkbp_info *info)
{
- if (ec_command(dev, EC_CMD_CROS_EC_INFO, 0, NULL, 0, info,
- sizeof(*info)) < sizeof(*info))
+ if (ec_command(dev, EC_CMD_MKBP_INFO, 0, NULL, 0, info,
+ sizeof(*info)) != sizeof(*info))
return -1;
return 0;
* used by ACPI/SMI.
*/
if (ec_command_inptr(dev, EC_CMD_HOST_EVENT_GET_B, 0, NULL, 0,
- (uint8_t **)&resp, sizeof(*resp)) < sizeof(*resp))
+ (uint8_t **)&resp, sizeof(*resp)) < (int)sizeof(*resp))
return -1;
if (resp->mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_INVALID))
if (ec_command(dev, EC_CMD_FLASH_PROTECT, EC_VER_FLASH_PROTECT,
¶ms, sizeof(params),
- resp, sizeof(*resp)) < sizeof(*resp))
+ resp, sizeof(*resp)) != sizeof(*resp))
return -1;
return 0;
struct ec_params_hello req;
struct ec_response_hello *resp;
-#ifdef CONFIG_CROS_EC_LPC
- /* LPC has its own way of doing this */
- if (dev->interface == CROS_EC_IF_LPC)
- return cros_ec_lpc_check_version(dev);
-#endif
+ struct dm_cros_ec_ops *ops;
+ int ret;
+
+ ops = dm_cros_ec_get_ops(dev->dev);
+ if (ops->check_version) {
+ ret = ops->check_version(dev->dev);
+ if (ret)
+ return ret;
+ }
/*
*
* So for now, just read all the data anyway.
*/
- dev->cmd_version_is_supported = 1;
+
+ /* Try sending a version 3 packet */
+ dev->protocol_version = 3;
+ req.in_data = 0;
+ if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
+ (uint8_t **)&resp, sizeof(*resp)) > 0) {
+ return 0;
+ }
+
+ /* Try sending a version 2 packet */
+ dev->protocol_version = 2;
if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
(uint8_t **)&resp, sizeof(*resp)) > 0) {
- /* It appears to understand new version commands */
- dev->cmd_version_is_supported = 1;
- } else {
- dev->cmd_version_is_supported = 0;
- if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req,
- sizeof(req), (uint8_t **)&resp,
- sizeof(*resp)) < 0) {
- debug("%s: Failed both old and new command style\n",
- __func__);
- return -1;
- }
+ return 0;
}
- return 0;
+ /*
+ * Fail if we're still here, since the EC doesn't understand any
+ * protcol version we speak. Version 1 interface without command
+ * version is no longer supported, and we don't know about any new
+ * protocol versions.
+ */
+ dev->protocol_version = 0;
+ printf("%s: ERROR: old EC interface not supported\n", __func__);
+ return -1;
}
int cros_ec_test(struct cros_ec_dev *dev)
p.offset = offset;
p.size = size;
- assert(data && p.size <= sizeof(p.data));
- memcpy(p.data, data, p.size);
+ assert(data && p.size <= EC_FLASH_WRITE_VER0_SIZE);
+ memcpy(&p + 1, data, p.size);
return ec_command_inptr(dev, EC_CMD_FLASH_WRITE, 0,
&p, sizeof(p), NULL, 0) >= 0 ? 0 : -1;
*/
static int cros_ec_flash_write_burst_size(struct cros_ec_dev *dev)
{
- struct ec_params_flash_write p;
- return sizeof(p.data);
+ return EC_FLASH_WRITE_VER0_SIZE;
}
/**
if (cros_ec_flash_offset(dev, EC_FLASH_REGION_RW, &rw_offset, &rw_size))
return -1;
- if (image_size > rw_size)
+ if (image_size > (int)rw_size)
return -1;
/* Invalidate the existing hash, just in case the AP reboots
return 0;
}
-int cros_ec_set_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t state)
+int cros_ec_set_ldo(struct udevice *dev, uint8_t index, uint8_t state)
{
+ struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
struct ec_params_ldo_set params;
params.index = index;
params.state = state;
- if (ec_command_inptr(dev, EC_CMD_LDO_SET, 0,
- ¶ms, sizeof(params),
- NULL, 0))
+ if (ec_command_inptr(cdev, EC_CMD_LDO_SET, 0, ¶ms, sizeof(params),
+ NULL, 0))
return -1;
return 0;
}
-int cros_ec_get_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t *state)
+int cros_ec_get_ldo(struct udevice *dev, uint8_t index, uint8_t *state)
{
+ struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
struct ec_params_ldo_get params;
struct ec_response_ldo_get *resp;
params.index = index;
- if (ec_command_inptr(dev, EC_CMD_LDO_GET, 0,
- ¶ms, sizeof(params),
- (uint8_t **)&resp, sizeof(*resp)) < sizeof(*resp))
+ if (ec_command_inptr(cdev, EC_CMD_LDO_GET, 0, ¶ms, sizeof(params),
+ (uint8_t **)&resp, sizeof(*resp)) !=
+ sizeof(*resp))
return -1;
*state = resp->state;
return 0;
}
-/**
- * Decode MBKP details from the device tree and allocate a suitable device.
- *
- * @param blob Device tree blob
- * @param node Node to decode from
- * @param devp Returns a pointer to the new allocated device
- * @return 0 if ok, -1 on error
- */
-static int cros_ec_decode_fdt(const void *blob, int node,
- struct cros_ec_dev **devp)
-{
- enum fdt_compat_id compat;
- struct cros_ec_dev *dev;
- int parent;
-
- /* See what type of parent we are inside (this is expensive) */
- parent = fdt_parent_offset(blob, node);
- if (parent < 0) {
- debug("%s: Cannot find node parent\n", __func__);
- return -1;
- }
-
- dev = &static_dev;
- dev->node = node;
- dev->parent_node = parent;
-
- compat = fdtdec_lookup(blob, parent);
- switch (compat) {
-#ifdef CONFIG_CROS_EC_SPI
- case COMPAT_SAMSUNG_EXYNOS_SPI:
- dev->interface = CROS_EC_IF_SPI;
- if (cros_ec_spi_decode_fdt(dev, blob))
- return -1;
- break;
-#endif
-#ifdef CONFIG_CROS_EC_I2C
- case COMPAT_SAMSUNG_S3C2440_I2C:
- dev->interface = CROS_EC_IF_I2C;
- if (cros_ec_i2c_decode_fdt(dev, blob))
- return -1;
- break;
-#endif
-#ifdef CONFIG_CROS_EC_LPC
- case COMPAT_INTEL_LPC:
- dev->interface = CROS_EC_IF_LPC;
- break;
-#endif
- default:
- debug("%s: Unknown compat id %d\n", __func__, compat);
- return -1;
- }
-
- fdtdec_decode_gpio(blob, node, "ec-interrupt", &dev->ec_int);
- dev->optimise_flash_write = fdtdec_get_bool(blob, node,
- "optimise-flash-write");
- *devp = dev;
-
- return 0;
-}
-
-int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp)
+int cros_ec_register(struct udevice *dev)
{
+ struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
+ const void *blob = gd->fdt_blob;
+ int node = dev->of_offset;
char id[MSG_BYTES];
- struct cros_ec_dev *dev;
- int node = 0;
-
- *cros_ecp = NULL;
- do {
- node = fdtdec_next_compatible(blob, node,
- COMPAT_GOOGLE_CROS_EC);
- if (node < 0) {
- debug("%s: Node not found\n", __func__);
- return 0;
- }
- } while (!fdtdec_get_is_enabled(blob, node));
-
- if (cros_ec_decode_fdt(blob, node, &dev)) {
- debug("%s: Failed to decode device.\n", __func__);
- return -CROS_EC_ERR_FDT_DECODE;
- }
-
- switch (dev->interface) {
-#ifdef CONFIG_CROS_EC_SPI
- case CROS_EC_IF_SPI:
- if (cros_ec_spi_init(dev, blob)) {
- debug("%s: Could not setup SPI interface\n", __func__);
- return -CROS_EC_ERR_DEV_INIT;
- }
- break;
-#endif
-#ifdef CONFIG_CROS_EC_I2C
- case CROS_EC_IF_I2C:
- if (cros_ec_i2c_init(dev, blob))
- return -CROS_EC_ERR_DEV_INIT;
- break;
-#endif
-#ifdef CONFIG_CROS_EC_LPC
- case CROS_EC_IF_LPC:
- if (cros_ec_lpc_init(dev, blob))
- return -CROS_EC_ERR_DEV_INIT;
- break;
-#endif
- case CROS_EC_IF_NONE:
- default:
- return 0;
- }
- /* we will poll the EC interrupt line */
- fdtdec_setup_gpio(&dev->ec_int);
- if (fdt_gpio_isvalid(&dev->ec_int))
- gpio_direction_input(dev->ec_int.gpio);
+ cdev->dev = dev;
+ gpio_request_by_name(dev, "ec-interrupt", 0, &cdev->ec_int,
+ GPIOD_IS_IN);
+ cdev->optimise_flash_write = fdtdec_get_bool(blob, node,
+ "optimise-flash-write");
- if (cros_ec_check_version(dev)) {
+ if (cros_ec_check_version(cdev)) {
debug("%s: Could not detect CROS-EC version\n", __func__);
return -CROS_EC_ERR_CHECK_VERSION;
}
- if (cros_ec_read_id(dev, id, sizeof(id))) {
+ if (cros_ec_read_id(cdev, id, sizeof(id))) {
debug("%s: Could not read KBC ID\n", __func__);
return -CROS_EC_ERR_READ_ID;
}
/* Remember this device for use by the cros_ec command */
- last_dev = *cros_ecp = dev;
- debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);
+ debug("Google Chrome EC v%d CROS-EC driver ready, id '%s'\n",
+ cdev->protocol_version, id);
return 0;
}
-#ifdef CONFIG_CMD_CROS_EC
int cros_ec_decode_region(int argc, char * const argv[])
{
if (argc > 0) {
return -1;
}
+int cros_ec_decode_ec_flash(const void *blob, int node,
+ struct fdt_cros_ec *config)
+{
+ int flash_node;
+
+ flash_node = fdt_subnode_offset(blob, node, "flash");
+ if (flash_node < 0) {
+ debug("Failed to find flash node\n");
+ return -1;
+ }
+
+ if (fdtdec_read_fmap_entry(blob, flash_node, "flash",
+ &config->flash)) {
+ debug("Failed to decode flash node in chrome-ec'\n");
+ return -1;
+ }
+
+ config->flash_erase_value = fdtdec_get_int(blob, flash_node,
+ "erase-value", -1);
+ for (node = fdt_first_subnode(blob, flash_node); node >= 0;
+ node = fdt_next_subnode(blob, node)) {
+ const char *name = fdt_get_name(blob, node, NULL);
+ enum ec_flash_region region;
+
+ if (0 == strcmp(name, "ro")) {
+ region = EC_FLASH_REGION_RO;
+ } else if (0 == strcmp(name, "rw")) {
+ region = EC_FLASH_REGION_RW;
+ } else if (0 == strcmp(name, "wp-ro")) {
+ region = EC_FLASH_REGION_WP_RO;
+ } else {
+ debug("Unknown EC flash region name '%s'\n", name);
+ return -1;
+ }
+
+ if (fdtdec_read_fmap_entry(blob, node, "reg",
+ &config->region[region])) {
+ debug("Failed to decode flash region in chrome-ec'\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+int cros_ec_i2c_tunnel(struct udevice *dev, struct i2c_msg *in, int nmsgs)
+{
+ struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
+ union {
+ struct ec_params_i2c_passthru p;
+ uint8_t outbuf[EC_PROTO2_MAX_PARAM_SIZE];
+ } params;
+ union {
+ struct ec_response_i2c_passthru r;
+ uint8_t inbuf[EC_PROTO2_MAX_PARAM_SIZE];
+ } response;
+ struct ec_params_i2c_passthru *p = ¶ms.p;
+ struct ec_response_i2c_passthru *r = &response.r;
+ struct ec_params_i2c_passthru_msg *msg;
+ uint8_t *pdata, *read_ptr = NULL;
+ int read_len;
+ int size;
+ int rv;
+ int i;
+
+ p->port = 0;
+
+ p->num_msgs = nmsgs;
+ size = sizeof(*p) + p->num_msgs * sizeof(*msg);
+
+ /* Create a message to write the register address and optional data */
+ pdata = (uint8_t *)p + size;
+
+ read_len = 0;
+ for (i = 0, msg = p->msg; i < nmsgs; i++, msg++, in++) {
+ bool is_read = in->flags & I2C_M_RD;
+
+ msg->addr_flags = in->addr;
+ msg->len = in->len;
+ if (is_read) {
+ msg->addr_flags |= EC_I2C_FLAG_READ;
+ read_len += in->len;
+ read_ptr = in->buf;
+ if (sizeof(*r) + read_len > sizeof(response)) {
+ puts("Read length too big for buffer\n");
+ return -1;
+ }
+ } else {
+ if (pdata - (uint8_t *)p + in->len > sizeof(params)) {
+ puts("Params too large for buffer\n");
+ return -1;
+ }
+ memcpy(pdata, in->buf, in->len);
+ pdata += in->len;
+ }
+ }
+
+ rv = ec_command(cdev, EC_CMD_I2C_PASSTHRU, 0, p, pdata - (uint8_t *)p,
+ r, sizeof(*r) + read_len);
+ if (rv < 0)
+ return rv;
+
+ /* Parse response */
+ if (r->i2c_status & EC_I2C_STATUS_ERROR) {
+ printf("Transfer failed with status=0x%x\n", r->i2c_status);
+ return -1;
+ }
+
+ if (rv < sizeof(*r) + read_len) {
+ puts("Truncated read response\n");
+ return -1;
+ }
+
+ /* We only support a single read message for each transfer */
+ if (read_len)
+ memcpy(read_ptr, r->data, read_len);
+
+ return 0;
+}
+
+#ifdef CONFIG_CMD_CROS_EC
+
/**
* Perform a flash read or write command
*
static int do_cros_ec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
- struct cros_ec_dev *dev = last_dev;
+ struct cros_ec_dev *dev;
+ struct udevice *udev;
const char *cmd;
int ret = 0;
cmd = argv[1];
if (0 == strcmp("init", cmd)) {
- ret = cros_ec_init(gd->fdt_blob, &dev);
+ /* Remove any existing device */
+ ret = uclass_find_device(UCLASS_CROS_EC, 0, &udev);
+ if (!ret)
+ device_remove(udev);
+ ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
if (ret) {
printf("Could not init cros_ec device (err %d)\n", ret);
return 1;
return 0;
}
- /* Just use the last allocated device; there should be only one */
- if (!last_dev) {
- printf("No CROS-EC device available\n");
+ ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
+ if (ret) {
+ printf("Cannot get cros-ec device (err=%d)\n", ret);
return 1;
}
+ dev = dev_get_uclass_priv(udev);
if (0 == strcmp("id", cmd)) {
char id[MSG_BYTES];
}
printf("%s\n", id);
} else if (0 == strcmp("info", cmd)) {
- struct ec_response_cros_ec_info info;
+ struct ec_response_mkbp_info info;
if (cros_ec_info(dev, &info)) {
debug("%s: Could not read KBC info\n", __func__);
if (!ret) {
/* Print versions */
printf("RO version: %1.*s\n",
- sizeof(p->version_string_ro),
+ (int)sizeof(p->version_string_ro),
p->version_string_ro);
printf("RW version: %1.*s\n",
- sizeof(p->version_string_rw),
+ (int)sizeof(p->version_string_rw),
p->version_string_rw);
printf("Firmware copy: %s\n",
(p->current_image <
state = simple_strtoul(argv[3], &endp, 10);
if (*argv[3] == 0 || *endp != 0)
return CMD_RET_USAGE;
- ret = cros_ec_set_ldo(dev, index, state);
+ ret = cros_ec_set_ldo(udev, index, state);
} else {
- ret = cros_ec_get_ldo(dev, index, &state);
+ ret = cros_ec_get_ldo(udev, index, &state);
if (!ret) {
printf("LDO%d: %s\n", index,
state == EC_LDO_STATE_ON ?
}
U_BOOT_CMD(
- crosec, 5, 1, do_cros_ec,
+ crosec, 6, 1, do_cros_ec,
"CROS-EC utility command",
"init Re-init CROS-EC (done on startup automatically)\n"
"crosec id Read CROS-EC ID\n"
"crosec version Read CROS-EC version"
);
#endif
+
+UCLASS_DRIVER(cros_ec) = {
+ .id = UCLASS_CROS_EC,
+ .name = "cros_ec",
+ .per_device_auto_alloc_size = sizeof(struct cros_ec_dev),
+ .post_bind = dm_scan_fdt_dev,
+};
projects / u-boot.git / blobdiff