x86: Update SPL for coreboot

[oweals/u-boot.git] / drivers / misc / cros_ec_spi.c

diff --git a/drivers/misc/cros_ec_spi.c b/drivers/misc/cros_ec_spi.c
index ac2ee86edae62c8dc8a30bbd7a97c7f826cf2eda..be510704c48bec2456b554d52ea9cf8f506b03a2 100644 (file)
--- a/drivers/misc/cros_ec_spi.c
+++ b/drivers/misc/cros_ec_spi.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Chromium OS cros_ec driver - SPI interface
  *
  * Copyright (c) 2012 The Chromium OS Authors.
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 /*
@@ -19,12 +18,12 @@
 #include <errno.h>
 #include <spi.h>
 
-DECLARE_GLOBAL_DATA_PTR;
-
 int cros_ec_spi_packet(struct udevice *udev, int out_bytes, int in_bytes)
 {
        struct cros_ec_dev *dev = dev_get_uclass_priv(udev);
-       struct spi_slave *slave = dev_get_parentdata(dev->dev);
+       struct spi_slave *slave = dev_get_parent_priv(dev->dev);
+       ulong start;
+       uint8_t byte;
        int rv;
 
        /* Do the transfer */
@@ -33,10 +32,25 @@ int cros_ec_spi_packet(struct udevice *udev, int out_bytes, int in_bytes)
                return -1;
        }
 
-       rv = spi_xfer(slave, max(out_bytes, in_bytes) * 8,
-                     dev->dout, dev->din,
-                     SPI_XFER_BEGIN | SPI_XFER_END);
+       rv = spi_xfer(slave, out_bytes * 8, dev->dout, NULL, SPI_XFER_BEGIN);
+       if (rv)
+               goto done;
+       start = get_timer(0);
+       while (1) {
+               rv = spi_xfer(slave, 8, NULL, &byte, 0);
+               if (byte == SPI_PREAMBLE_END_BYTE)
+                       break;
+               if (rv)
+                       goto done;
+               if (get_timer(start) > 100) {
+                       rv = -ETIMEDOUT;
+                       goto done;
+               }
+       }
 
+       rv = spi_xfer(slave, in_bytes * 8, NULL, dev->din, 0);
+done:
+       spi_xfer(slave, 0, NULL, NULL, SPI_XFER_END);
        spi_release_bus(slave);
 
        if (rv) {
@@ -67,7 +81,7 @@ int cros_ec_spi_command(struct udevice *udev, uint8_t cmd, int cmd_version,
                     uint8_t **dinp, int din_len)
 {
        struct cros_ec_dev *dev = dev_get_uclass_priv(udev);
-       struct spi_slave *slave = dev_get_parentdata(dev->dev);
+       struct spi_slave *slave = dev_get_parent_priv(dev->dev);
        int in_bytes = din_len + 4;     /* status, length, checksum, trailer */
        uint8_t *out;
        uint8_t *p;