#include <common.h>
#include <command.h>
+#include <dm.h>
#include <i2c.h>
#include <cros_ec.h>
#include <fdtdec.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm-generic/gpio.h>
+#include <dm/device-internal.h>
+#include <dm/root.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 */
* @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
+ * @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)
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;
if (in_bytes < 0)
return in_bytes;
- switch (dev->interface) {
-#ifdef CONFIG_CROS_EC_SPI
- case CROS_EC_IF_SPI:
- rv = cros_ec_spi_packet(dev, out_bytes, in_bytes);
- break;
-#endif
- case CROS_EC_IF_NONE:
- /* TODO: support protocol 3 for LPC, I2C; for now fall through */
- default:
- debug("%s: Unsupported interface\n", __func__);
- rv = -1;
- }
+ 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;
const void *dout, int dout_len,
uint8_t **dinp, int din_len)
{
+ struct dm_cros_ec_ops *ops;
int ret = -1;
/* Handle protocol version 3 support */
dout, dout_len, dinp, din_len);
}
- 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;
- }
+ 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,
* 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,
int cros_ec_interrupt_pending(struct cros_ec_dev *dev)
{
/* no interrupt support : always poll */
- if (!fdt_gpio_isvalid(&dev->ec_int))
+ if (!dm_gpio_is_valid(&dev->ec_int))
return -ENOENT;
- return !gpio_get_value(dev->ec_int.gpio);
+ return dm_gpio_get_value(&dev->ec_int);
}
int cros_ec_info(struct cros_ec_dev *dev, struct ec_response_mkbp_info *info)
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;
+ }
/*
* TODO(sjg@chromium.org).
/* 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;
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 EC interface 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;
}
return -1;
}
-int cros_ec_decode_ec_flash(const void *blob, struct fdt_cros_ec *config)
+int cros_ec_decode_ec_flash(const void *blob, int node,
+ struct fdt_cros_ec *config)
{
- int flash_node, node;
-
- node = fdtdec_next_compatible(blob, 0, COMPAT_GOOGLE_CROS_EC);
- if (node < 0) {
- debug("Failed to find chrome-ec node'\n");
- return -1;
- }
+ int flash_node;
flash_node = fdt_subnode_offset(blob, node, "flash");
if (flash_node < 0) {
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
/**
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];
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 ?
return ret;
}
+int cros_ec_post_bind(struct udevice *dev)
+{
+ /* Scan for available EC devices (e.g. I2C tunnel) */
+ return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
+}
+
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 = cros_ec_post_bind,
+};
projects / u-boot / blobdiff