dm: cros_ec: Add support for driver model
Add support for driver model if enabled. This involves minimal changes to the code, mostly just plumbing around the edges. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>utp
Simon Glass
parent
fda6fac39b
commit
84d6cbd302
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@ -10,25 +10,44 @@
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#include <common.h>
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#include <cros_ec.h>
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#include <dm.h>
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#include <errno.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifndef CONFIG_DM_CROS_EC
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struct local_info {
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struct cros_ec_dev *cros_ec_dev; /* Pointer to cros_ec device */
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int cros_ec_err; /* Error for cros_ec, 0 if ok */
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};
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static struct local_info local;
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#endif
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struct cros_ec_dev *board_get_cros_ec_dev(void)
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{
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#ifdef CONFIG_DM_CROS_EC
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struct udevice *dev;
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int ret;
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ret = uclass_get_device(UCLASS_CROS_EC, 0, &dev);
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if (ret) {
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debug("%s: Error %d\n", __func__, ret);
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return NULL;
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}
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return dev->uclass_priv;
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#else
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return local.cros_ec_dev;
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#endif
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}
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static int board_init_cros_ec_devices(const void *blob)
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{
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#ifndef CONFIG_DM_CROS_EC
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local.cros_ec_err = cros_ec_init(blob, &local.cros_ec_dev);
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if (local.cros_ec_err)
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return -1; /* Will report in board_late_init() */
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#endif
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return 0;
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}
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@ -40,5 +59,16 @@ int cros_ec_board_init(void)
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int cros_ec_get_error(void)
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{
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#ifdef CONFIG_DM_CROS_EC
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struct udevice *dev;
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int ret;
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ret = uclass_get_device(UCLASS_CROS_EC, 0, &dev);
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if (ret && ret != -ENODEV)
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return ret;
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return 0;
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#else
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return local.cros_ec_err;
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#endif
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}
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@ -16,6 +16,7 @@
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#include <common.h>
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#include <command.h>
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#include <dm.h>
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#include <i2c.h>
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#include <cros_ec.h>
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#include <fdtdec.h>
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@ -24,6 +25,8 @@
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#include <asm/errno.h>
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#include <asm/io.h>
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#include <asm-generic/gpio.h>
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#include <dm/device-internal.h>
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#include <dm/uclass-internal.h>
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#ifdef DEBUG_TRACE
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#define debug_trace(fmt, b...) debug(fmt, #b)
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@ -38,7 +41,9 @@ enum {
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CROS_EC_CMD_HASH_TIMEOUT_MS = 2000,
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};
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#ifndef CONFIG_DM_CROS_EC
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static struct cros_ec_dev static_dev, *last_dev;
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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@ -204,6 +209,9 @@ static int send_command_proto3(struct cros_ec_dev *dev,
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const void *dout, int dout_len,
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uint8_t **dinp, int din_len)
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{
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#ifdef CONFIG_DM_CROS_EC
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struct dm_cros_ec_ops *ops;
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#endif
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int out_bytes, in_bytes;
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int rv;
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@ -218,6 +226,10 @@ static int send_command_proto3(struct cros_ec_dev *dev,
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if (in_bytes < 0)
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return in_bytes;
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#ifdef CONFIG_DM_CROS_EC
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ops = dm_cros_ec_get_ops(dev->dev);
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rv = ops->packet(dev->dev, out_bytes, in_bytes);
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#else
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switch (dev->interface) {
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#ifdef CONFIG_CROS_EC_SPI
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case CROS_EC_IF_SPI:
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@ -235,6 +247,7 @@ static int send_command_proto3(struct cros_ec_dev *dev,
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debug("%s: Unsupported interface\n", __func__);
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rv = -1;
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}
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#endif
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if (rv < 0)
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return rv;
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@ -246,6 +259,9 @@ static int send_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
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const void *dout, int dout_len,
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uint8_t **dinp, int din_len)
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{
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#ifdef CONFIG_DM_CROS_EC
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struct dm_cros_ec_ops *ops;
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#endif
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int ret = -1;
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/* Handle protocol version 3 support */
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@ -254,6 +270,11 @@ static int send_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
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dout, dout_len, dinp, din_len);
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}
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#ifdef CONFIG_DM_CROS_EC
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ops = dm_cros_ec_get_ops(dev->dev);
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ret = ops->command(dev->dev, cmd, cmd_version,
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(const uint8_t *)dout, dout_len, dinp, din_len);
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#else
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switch (dev->interface) {
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#ifdef CONFIG_CROS_EC_SPI
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case CROS_EC_IF_SPI:
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@ -280,6 +301,7 @@ static int send_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
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default:
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ret = -1;
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}
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#endif
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return ret;
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}
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@ -990,6 +1012,7 @@ int cros_ec_get_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t *state)
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return 0;
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}
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#ifndef CONFIG_DM_CROS_EC
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/**
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* Decode EC interface details from the device tree and allocate a suitable
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* device.
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@ -1055,11 +1078,61 @@ static int cros_ec_decode_fdt(const void *blob, int node,
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return 0;
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}
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#endif
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#ifdef CONFIG_DM_CROS_EC
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int cros_ec_register(struct udevice *dev)
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{
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struct cros_ec_dev *cdev = dev->uclass_priv;
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const void *blob = gd->fdt_blob;
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int node = dev->of_offset;
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char id[MSG_BYTES];
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cdev->dev = dev;
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fdtdec_decode_gpio(blob, node, "ec-interrupt", &cdev->ec_int);
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cdev->optimise_flash_write = fdtdec_get_bool(blob, node,
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"optimise-flash-write");
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/* we will poll the EC interrupt line */
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fdtdec_setup_gpio(&cdev->ec_int);
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if (fdt_gpio_isvalid(&cdev->ec_int)) {
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gpio_request(cdev->ec_int.gpio, "cros-ec-irq");
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gpio_direction_input(cdev->ec_int.gpio);
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}
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if (cros_ec_check_version(cdev)) {
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debug("%s: Could not detect CROS-EC version\n", __func__);
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return -CROS_EC_ERR_CHECK_VERSION;
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}
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if (cros_ec_read_id(cdev, id, sizeof(id))) {
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debug("%s: Could not read KBC ID\n", __func__);
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return -CROS_EC_ERR_READ_ID;
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}
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/* Remember this device for use by the cros_ec command */
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debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);
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return 0;
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}
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#else
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int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp)
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{
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char id[MSG_BYTES];
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struct cros_ec_dev *dev;
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char id[MSG_BYTES];
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#ifdef CONFIG_DM_CROS_EC
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struct udevice *udev;
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int ret;
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ret = uclass_find_device(UCLASS_CROS_EC, 0, &udev);
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if (!ret)
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device_remove(udev);
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ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
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if (ret)
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return ret;
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dev = udev->uclass_priv;
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return 0;
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#else
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int node = 0;
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*cros_ecp = NULL;
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@ -1108,11 +1181,14 @@ int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp)
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default:
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return 0;
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}
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#endif
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/* we will poll the EC interrupt line */
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fdtdec_setup_gpio(&dev->ec_int);
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if (fdt_gpio_isvalid(&dev->ec_int))
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if (fdt_gpio_isvalid(&dev->ec_int)) {
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gpio_request(dev->ec_int.gpio, "cros-ec-irq");
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gpio_direction_input(dev->ec_int.gpio);
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}
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if (cros_ec_check_version(dev)) {
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debug("%s: Could not detect CROS-EC version\n", __func__);
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@ -1125,11 +1201,15 @@ int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp)
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}
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/* Remember this device for use by the cros_ec command */
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last_dev = *cros_ecp = dev;
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*cros_ecp = dev;
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#ifndef CONFIG_DM_CROS_EC
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last_dev = dev;
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#endif
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debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);
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return 0;
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}
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#endif
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int cros_ec_decode_region(int argc, char * const argv[])
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{
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@ -1147,15 +1227,10 @@ int cros_ec_decode_region(int argc, char * const argv[])
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return -1;
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}
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int cros_ec_decode_ec_flash(const void *blob, struct fdt_cros_ec *config)
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int cros_ec_decode_ec_flash(const void *blob, int node,
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struct fdt_cros_ec *config)
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{
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int flash_node, node;
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node = fdtdec_next_compatible(blob, 0, COMPAT_GOOGLE_CROS_EC);
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if (node < 0) {
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debug("Failed to find chrome-ec node'\n");
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return -1;
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}
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int flash_node;
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flash_node = fdt_subnode_offset(blob, node, "flash");
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if (flash_node < 0) {
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@ -1516,7 +1591,10 @@ static int cros_ec_i2c_passthrough(struct cros_ec_dev *dev, int flag,
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static int do_cros_ec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct cros_ec_dev *dev = last_dev;
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struct cros_ec_dev *dev;
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#ifdef CONFIG_DM_CROS_EC
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struct udevice *udev;
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#endif
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const char *cmd;
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int ret = 0;
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@ -1525,19 +1603,31 @@ static int do_cros_ec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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cmd = argv[1];
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if (0 == strcmp("init", cmd)) {
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#ifndef CONFIG_DM_CROS_EC
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ret = cros_ec_init(gd->fdt_blob, &dev);
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if (ret) {
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printf("Could not init cros_ec device (err %d)\n", ret);
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return 1;
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}
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#endif
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return 0;
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}
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#ifdef CONFIG_DM_CROS_EC
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ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
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if (ret) {
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printf("Cannot get cros-ec device (err=%d)\n", ret);
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return 1;
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}
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dev = udev->uclass_priv;
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#else
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/* Just use the last allocated device; there should be only one */
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if (!last_dev) {
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printf("No CROS-EC device available\n");
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return 1;
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}
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dev = last_dev;
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#endif
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if (0 == strcmp("id", cmd)) {
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char id[MSG_BYTES];
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@ -1794,3 +1884,11 @@ U_BOOT_CMD(
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"crosec i2c mw chip address[.0, .1, .2] value [count] - write to I2C passthru (fill)"
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);
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#endif
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#ifdef CONFIG_DM_CROS_EC
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UCLASS_DRIVER(cros_ec) = {
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.id = UCLASS_CROS_EC,
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.name = "cros_ec",
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.per_device_auto_alloc_size = sizeof(struct cros_ec_dev),
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};
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#endif
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@ -525,8 +525,13 @@ int cros_ec_sandbox_init(struct cros_ec_dev *dev, const void *blob)
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int node;
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int err;
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state = &s_state;
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err = cros_ec_decode_ec_flash(blob, &ec->ec_config);
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node = fdtdec_next_compatible(blob, 0, COMPAT_GOOGLE_CROS_EC);
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if (node < 0) {
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debug("Failed to find chrome-ec node'\n");
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return -1;
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}
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err = cros_ec_decode_ec_flash(blob, node, &ec->ec_config);
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if (err)
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return err;
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@ -14,6 +14,7 @@
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#include <fdtdec.h>
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#include <cros_ec_message.h>
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#ifndef CONFIG_DM_CROS_EC
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/* Which interface is the device on? */
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enum cros_ec_interface_t {
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CROS_EC_IF_NONE,
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@ -22,9 +23,13 @@ enum cros_ec_interface_t {
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CROS_EC_IF_LPC, /* Intel Low Pin Count interface */
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CROS_EC_IF_SANDBOX,
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};
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#endif
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/* Our configuration information */
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struct cros_ec_dev {
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#ifdef CONFIG_DM_CROS_EC
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struct udevice *dev; /* Transport device */
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#else
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enum cros_ec_interface_t interface;
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struct spi_slave *spi; /* Our SPI slave, if using SPI */
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int node; /* Our node */
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@ -33,6 +38,7 @@ struct cros_ec_dev {
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unsigned int addr; /* Device address (for I2C) */
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unsigned int bus_num; /* Bus number (for I2C) */
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unsigned int max_frequency; /* Maximum interface frequency */
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#endif
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struct fdt_gpio_state ec_int; /* GPIO used as EC interrupt line */
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int protocol_version; /* Protocol version to use */
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int optimise_flash_write; /* Don't write erased flash blocks */
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@ -233,6 +239,22 @@ int cros_ec_flash_update_rw(struct cros_ec_dev *dev,
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*/
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struct cros_ec_dev *board_get_cros_ec_dev(void);
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#ifdef CONFIG_DM_CROS_EC
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struct dm_cros_ec_ops {
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int (*check_version)(struct udevice *dev);
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int (*command)(struct udevice *dev, uint8_t cmd, int cmd_version,
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const uint8_t *dout, int dout_len,
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uint8_t **dinp, int din_len);
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int (*packet)(struct udevice *dev, int out_bytes, int in_bytes);
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};
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#define dm_cros_ec_get_ops(dev) \
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((struct dm_cros_ec_ops *)(dev)->driver->ops)
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int cros_ec_register(struct udevice *dev);
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#else /* !CONFIG_DM_CROS_EC */
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/* Internal interfaces */
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int cros_ec_i2c_init(struct cros_ec_dev *dev, const void *blob);
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@ -336,6 +358,7 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
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int cros_ec_spi_packet(struct cros_ec_dev *dev, int out_bytes, int in_bytes);
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int cros_ec_sandbox_packet(struct cros_ec_dev *dev, int out_bytes,
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int in_bytes);
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#endif
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/**
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* Dump a block of data for a command.
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@ -489,9 +512,11 @@ int cros_ec_get_error(void);
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* Returns information from the FDT about the Chrome EC flash
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*
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* @param blob FDT blob to use
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* @param node Node offset to read from
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* @param config Structure to use to return information
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*/
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int cros_ec_decode_ec_flash(const void *blob, struct fdt_cros_ec *config);
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int cros_ec_decode_ec_flash(const void *blob, int node,
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struct fdt_cros_ec *config);
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/**
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* Check the current keyboard state, in case recovery mode is requested.
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@ -26,6 +26,7 @@ enum uclass_id {
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UCLASS_SPI, /* SPI bus */
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UCLASS_SPI_GENERIC, /* Generic SPI flash target */
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UCLASS_SPI_FLASH, /* SPI flash */
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UCLASS_CROS_EC, /* Chrome OS EC */
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UCLASS_COUNT,
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UCLASS_INVALID = -1,
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