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Diffstat (limited to 'src/drivers/generic/bayhub/bh720.h')
-rw-r--r--src/drivers/generic/bayhub/bh720.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/src/drivers/generic/bayhub/bh720.h b/src/drivers/generic/bayhub/bh720.h
new file mode 100644
index 0000000000..b6fd2738cd
--- /dev/null
+++ b/src/drivers/generic/bayhub/bh720.h
@@ -0,0 +1,47 @@
+/*
+ * Driver for BayHub Technology BH720 PCI to eMMC 5.0 HS200 bridge
+ *
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google LLC.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+enum {
+ BH720_PROTECT = 0xd0,
+ BH720_PROTECT_LOCK_OFF = 0,
+ BH720_PROTECT_LOCK_ON = BIT(0),
+ BH720_PROTECT_OFF = 0,
+ BH720_PROTECT_ON = BIT(31),
+
+ BH720_LINK_CTRL = 0x90,
+ BH720_LINK_CTRL_L0_ENABLE = BIT(0),
+ BH720_LINK_CTRL_L1_ENABLE = BIT(1),
+ BH720_LINK_CTRL_CLKREQ = BIT(8),
+
+ BH720_MISC2 = 0xf0,
+ BH720_MISC2_ASPM_DISABLE = BIT(0),
+ BH720_MISC2_APSM_CLKREQ_L1 = BIT(7),
+ BH720_MISC2_APSM_PHY_L1 = BIT(10),
+ BH720_MISC2_APSM_MORE = BIT(12),
+
+ BH720_MEM_RW_DATA = 0x200,
+ BH720_MEM_RW_ADR = 0x204,
+ BH720_MEM_ACCESS_EN = 0x208,
+ BH720_PCR = 0x304,
+ BH720_PCR_DATA_CMD_DRV_MAX = 7,
+ BH720_PCR_CLK_DRV_MAX = 7,
+
+ BH720_RTD3_L1 = 0x3e0,
+ BH720_RTD3_L1_DISABLE_L1 = BIT(28),
+};
+
+void bh720_driving_strength(struct device *dev);