src/amd/stoneyridge: Move alink source to common

Relocate the alink access functions out of stoneyridge where they
were dead code.  This source maintains the ability to access all
register spaces, however more modern APUs define only ABCFG in
the BKDGs.

BUG=b:131682806

Change-Id: I5c558ccc64bd04a66399c678d43beb0a97e72f63
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32663
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

4 files changed, 154 insertions, 0 deletions

diff --git a/src/soc/amd/common/block/alink/Kconfig b/src/soc/amd/common/block/alink/Kconfig
new file mode 100644
index 0000000000..75cf66f194
--- /dev/null
+++ b/src/soc/amd/common/block/alink/Kconfig
@@ -0,0 +1,5 @@
+config SOC_AMD_COMMON_BLOCK_ALINK
+	bool
+	default n
+	help
+	  Select this option to access the FCH A-link configuration registers.
diff --git a/src/soc/amd/common/block/alink/Makefile.inc b/src/soc/amd/common/block/alink/Makefile.inc
new file mode 100644
index 0000000000..720a7cbd82
--- /dev/null
+++ b/src/soc/amd/common/block/alink/Makefile.inc
@@ -0,0 +1,6 @@
+bootblock-$(CONFIG_SOC_AMD_COMMON_BLOCK_ALINK) += alink.c
+verstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_ALINK) += alink.c
+romstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_ALINK) += alink.c
+postcar-$(CONFIG_SOC_AMD_COMMON_BLOCK_ALINK) += alink.c
+ramstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_ALINK) += alink.c
+smm-$(CONFIG_SOC_AMD_COMMON_BLOCK_ALINK) += alink.c
diff --git a/src/soc/amd/common/block/alink/alink.c b/src/soc/amd/common/block/alink/alink.c
new file mode 100644
index 0000000000..f481f6b340
--- /dev/null
+++ b/src/soc/amd/common/block/alink/alink.c
@@ -0,0 +1,95 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2010 Advanced Micro Devices, Inc.
+ *
+ * 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.
+ */
+
+#include <arch/io.h>
+#include <stdint.h>
+#include <console/console.h>
+#include <amdblocks/alink.h>
+
+void alink_ab_indx(u32 reg_space, u32 reg_addr, u32 mask, u32 val)
+{
+	u32 tmp;
+
+	outl((reg_space & 0x7) << 29 | reg_addr, AB_INDX);
+	tmp = inl(AB_DATA);
+	/* rpr 4.2
+	 * For certain revisions of the chip, the ABCFG registers,
+	 * with an address of 0x100NN (where 'N' is any hexadecimal
+	 * number), require an extra programming step.*/
+	outl(0, AB_INDX);
+
+	tmp &= ~mask;
+	tmp |= val;
+
+	// printk(BIOS_DEBUG, "about write %x, index=%x", tmp,
+	//				(reg_space&0x3)<<29 | reg_addr);
+
+	/* probably we dont have to do it again. */
+	outl((reg_space & 0x7) << 29 | reg_addr, AB_INDX);
+	outl(tmp, AB_DATA);
+	outl(0, AB_INDX);
+}
+
+void alink_rc_indx(u32 reg_space, u32 reg_addr, u32 port, u32 mask, u32 val)
+{
+	u32 tmp;
+
+	outl((reg_space & 0x7) << 29 | (port & 3) << 24 | reg_addr, AB_INDX);
+	tmp = inl(AB_DATA);
+	/* rpr 4.2
+	 * For certain revisions of the chip, the ABCFG registers,
+	 * with an address of 0x100NN (where 'N' is any hexadecimal
+	 * number), require an extra programming step.*/
+	outl(0, AB_INDX);
+
+	tmp &= ~mask;
+	tmp |= val;
+
+	//printk(BIOS_DEBUG, "about write %x, index=%x", tmp,
+	//		(reg_space&0x3)<<29 | (port&3) << 24 | reg_addr);
+
+	/* probably we dont have to do it again. */
+	outl((reg_space & 0x7) << 29 | (port & 3) << 24 | reg_addr, AB_INDX);
+	outl(tmp, AB_DATA);
+	outl(0, AB_INDX);
+}
+
+/*
+ * space = 0: AX_INDXC, AX_DATAC
+ * space = 1: AX_INDXP, AX_DATAP
+ */
+void alink_ax_indx(u32 space /*c or p? */, u32 axindc, u32 mask, u32 val)
+{
+	u32 tmp;
+
+	/* read axindc to tmp */
+	outl(space << 29 | space << 3 | 0x30, AB_INDX);
+	outl(axindc, AB_DATA);
+	outl(0, AB_INDX);
+	outl(space << 29 | space << 3 | 0x34, AB_INDX);
+	tmp = inl(AB_DATA);
+	outl(0, AB_INDX);
+
+	tmp &= ~mask;
+	tmp |= val;
+
+	/* write tmp */
+	outl(space << 29 | space << 3 | 0x30, AB_INDX);
+	outl(axindc, AB_DATA);
+	outl(0, AB_INDX);
+	outl(space << 29 | space << 3 | 0x34, AB_INDX);
+	outl(tmp, AB_DATA);
+	outl(0, AB_INDX);
+}
diff --git a/src/soc/amd/common/block/include/amdblocks/alink.h b/src/soc/amd/common/block/include/amdblocks/alink.h
new file mode 100644
index 0000000000..a6f748b809
--- /dev/null
+++ b/src/soc/amd/common/block/include/amdblocks/alink.h
@@ -0,0 +1,48 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2010 Advanced Micro Devices, Inc.
+ *
+ * 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.
+ */
+
+#ifndef __AMDBLOCKS_ALINK_H__
+#define __AMDBLOCKS_ALINK_H__
+
+#include <stdint.h>
+
+#define AB_INDX				0xcd8
+#define AB_DATA				(AB_INDX + 4)
+
+#define AX_INDXC			0
+#define AX_INDXP			2
+#define AXCFG				4
+#define ABCFG				6
+#define RC_INDXC			1
+#define RC_INDXP			3
+
+#define abcfg_reg(reg, mask, val)	\
+	alink_ab_indx((ABCFG), (reg), (mask), (val))
+#define axcfg_reg(reg, mask, val)	\
+	alink_ab_indx((AXCFG), (reg), (mask), (val))
+#define axindxc_reg(reg, mask, val)	\
+	alink_ax_indx((AX_INDXC), (reg), (mask), (val))
+#define axindxp_reg(reg, mask, val)		\
+	alink_ax_indx((AX_INDXP), (reg), (mask), (val))
+#define rcindxc_reg(reg, port, mask, val)	\
+	alink_rc_indx((RC_INDXC), (reg), (port), (mask), (val))
+#define rcindxp_reg(reg, port, mask, val)	\
+	alink_rc_indx((RC_INDXP), (reg), (port), (mask), (val))
+
+void alink_rc_indx(u32 reg_space, u32 reg_addr, u32 port, u32 mask, u32 val);
+void alink_ab_indx(u32 reg_space, u32 reg_addr, u32 mask, u32 val);
+void alink_ax_indx(u32 space /* c or p? */, u32 axindc, u32 mask, u32 val);
+
+#endif /* __AMDBLOCKS_ALINK_H__ */