return tb_sw_write(sw, data, TB_CFG_SWITCH, ROUTER_CS_9, dwords);
}
-static int usb4_switch_op_read_metadata(struct tb_switch *sw, u32 *metadata)
-{
- return tb_sw_read(sw, metadata, TB_CFG_SWITCH, ROUTER_CS_25, 1);
-}
-
-static int usb4_switch_op_write_metadata(struct tb_switch *sw, u32 metadata)
-{
- return tb_sw_write(sw, &metadata, TB_CFG_SWITCH, ROUTER_CS_25, 1);
-}
-
static int usb4_do_read_data(u16 address, void *buf, size_t size,
read_block_fn read_block, void *read_block_data)
{
return 0;
}
-static int usb4_switch_op(struct tb_switch *sw, u16 opcode, u8 *status)
+static int usb4_switch_op(struct tb_switch *sw, u16 opcode, u32 *metadata,
+ u8 *status)
{
u32 val;
int ret;
+ if (metadata) {
+ ret = tb_sw_write(sw, metadata, TB_CFG_SWITCH, ROUTER_CS_25, 1);
+ if (ret)
+ return ret;
+ }
+
val = opcode | ROUTER_CS_26_OV;
ret = tb_sw_write(sw, &val, TB_CFG_SWITCH, ROUTER_CS_26, 1);
if (ret)
if (val & ROUTER_CS_26_ONS)
return -EOPNOTSUPP;
- *status = (val & ROUTER_CS_26_STATUS_MASK) >> ROUTER_CS_26_STATUS_SHIFT;
- return 0;
+ if (status)
+ *status = (val & ROUTER_CS_26_STATUS_MASK) >>
+ ROUTER_CS_26_STATUS_SHIFT;
+
+ return metadata ?
+ tb_sw_read(sw, metadata, TB_CFG_SWITCH, ROUTER_CS_25, 1) : 0;
}
static void usb4_switch_check_wakes(struct tb_switch *sw)
metadata |= (dwaddress << USB4_DROM_ADDRESS_SHIFT) &
USB4_DROM_ADDRESS_MASK;
- ret = usb4_switch_op_write_metadata(sw, metadata);
- if (ret)
- return ret;
-
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_DROM_READ, &status);
+ ret = usb4_switch_op(sw, USB4_SWITCH_OP_DROM_READ, &metadata, &status);
if (ret)
return ret;
u8 status;
int ret;
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_SECTOR_SIZE, &status);
+ ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_SECTOR_SIZE, &metadata,
+ &status);
if (ret)
return ret;
if (status)
return status == 0x2 ? -EOPNOTSUPP : -EIO;
- ret = usb4_switch_op_read_metadata(sw, &metadata);
- if (ret)
- return ret;
-
return metadata & USB4_NVM_SECTOR_SIZE_MASK;
}
metadata |= (dwaddress << USB4_NVM_READ_OFFSET_SHIFT) &
USB4_NVM_READ_OFFSET_MASK;
- ret = usb4_switch_op_write_metadata(sw, metadata);
- if (ret)
- return ret;
-
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_READ, &status);
+ ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_READ, &metadata, &status);
if (ret)
return ret;
metadata = (dwaddress << USB4_NVM_SET_OFFSET_SHIFT) &
USB4_NVM_SET_OFFSET_MASK;
- ret = usb4_switch_op_write_metadata(sw, metadata);
- if (ret)
- return ret;
-
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_SET_OFFSET, &status);
+ ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_SET_OFFSET, &metadata,
+ &status);
if (ret)
return ret;
if (ret)
return ret;
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_WRITE, &status);
+ ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_WRITE, NULL, &status);
if (ret)
return ret;
* @sw: USB4 router
*
* After the new NVM has been written via usb4_switch_nvm_write(), this
- * function triggers NVM authentication process. If the authentication
- * is successful the router is power cycled and the new NVM starts
+ * function triggers NVM authentication process. The router gets power
+ * cycled and if the authentication is successful the new NVM starts
* running. In case of failure returns negative errno.
+ *
+ * The caller should call usb4_switch_nvm_authenticate_status() to read
+ * the status of the authentication after power cycle. It should be the
+ * first router operation to avoid the status being lost.
*/
int usb4_switch_nvm_authenticate(struct tb_switch *sw)
{
- u8 status = 0;
int ret;
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_AUTH, &status);
+ ret = usb4_switch_op(sw, USB4_SWITCH_OP_NVM_AUTH, NULL, NULL);
+ switch (ret) {
+ /*
+ * The router is power cycled once NVM_AUTH is started so it is
+ * expected to get any of the following errors back.
+ */
+ case -EACCES:
+ case -ENOTCONN:
+ case -ETIMEDOUT:
+ return 0;
+
+ default:
+ return ret;
+ }
+}
+
+/**
+ * usb4_switch_nvm_authenticate_status() - Read status of last NVM authenticate
+ * @sw: USB4 router
+ * @status: Status code of the operation
+ *
+ * The function checks if there is status available from the last NVM
+ * authenticate router operation. If there is status then %0 is returned
+ * and the status code is placed in @status. Returns negative errno in case
+ * of failure.
+ *
+ * Must be called before any other router operation.
+ */
+int usb4_switch_nvm_authenticate_status(struct tb_switch *sw, u32 *status)
+{
+ u16 opcode;
+ u32 val;
+ int ret;
+
+ ret = tb_sw_read(sw, &val, TB_CFG_SWITCH, ROUTER_CS_26, 1);
if (ret)
return ret;
- switch (status) {
- case 0x0:
- tb_sw_dbg(sw, "NVM authentication successful\n");
- return 0;
- case 0x1:
- return -EINVAL;
- case 0x2:
- return -EAGAIN;
- case 0x3:
- return -EOPNOTSUPP;
- default:
- return -EIO;
+ /* Check that the opcode is correct */
+ opcode = val & ROUTER_CS_26_OPCODE_MASK;
+ if (opcode == USB4_SWITCH_OP_NVM_AUTH) {
+ if (val & ROUTER_CS_26_OV)
+ return -EBUSY;
+ if (val & ROUTER_CS_26_ONS)
+ return -EOPNOTSUPP;
+
+ *status = (val & ROUTER_CS_26_STATUS_MASK) >>
+ ROUTER_CS_26_STATUS_SHIFT;
+ } else {
+ *status = 0;
}
+
+ return 0;
}
/**
*/
bool usb4_switch_query_dp_resource(struct tb_switch *sw, struct tb_port *in)
{
+ u32 metadata = in->port;
u8 status;
int ret;
- ret = usb4_switch_op_write_metadata(sw, in->port);
- if (ret)
- return false;
-
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_QUERY_DP_RESOURCE, &status);
+ ret = usb4_switch_op(sw, USB4_SWITCH_OP_QUERY_DP_RESOURCE, &metadata,
+ &status);
/*
* If DP resource allocation is not supported assume it is
* always available.
*/
int usb4_switch_alloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
{
+ u32 metadata = in->port;
u8 status;
int ret;
- ret = usb4_switch_op_write_metadata(sw, in->port);
- if (ret)
- return ret;
-
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_ALLOC_DP_RESOURCE, &status);
+ ret = usb4_switch_op(sw, USB4_SWITCH_OP_ALLOC_DP_RESOURCE, &metadata,
+ &status);
if (ret == -EOPNOTSUPP)
return 0;
else if (ret)
*/
int usb4_switch_dealloc_dp_resource(struct tb_switch *sw, struct tb_port *in)
{
+ u32 metadata = in->port;
u8 status;
int ret;
- ret = usb4_switch_op_write_metadata(sw, in->port);
- if (ret)
- return ret;
-
- ret = usb4_switch_op(sw, USB4_SWITCH_OP_DEALLOC_DP_RESOURCE, &status);
+ ret = usb4_switch_op(sw, USB4_SWITCH_OP_DEALLOC_DP_RESOURCE, &metadata,
+ &status);
if (ret == -EOPNOTSUPP)
return 0;
else if (ret)
projects / linux-2.6-microblaze.git / blobdiff