tools: Add intel_iosf_sb_{read,write} tools

Add generic tools to poke at IOSF sideband. The user needs to
manually specify SB port as well as the register.

TODO: Maybe add symbolic names for the units? Would avoid having
to trawl the docs for the magic hex value.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/lib/intel_iosf.c b/lib/intel_iosf.c
index ca206389..2f1ef90c 100644
--- a/lib/intel_iosf.c
+++ b/lib/intel_iosf.c
@@ -173,3 +173,17 @@ void intel_flisdsi_reg_write(uint32_t reg, uint32_t val)
 {
 	vlv_sideband_rw(IOSF_PORT_FLISDSI, SB_CRWRDA_NP, reg, &val);
 }
+
+uint32_t intel_iosf_sb_read(uint32_t port, uint32_t reg)
+{
+	uint32_t val;
+
+	vlv_sideband_rw(port, SB_CRRDDA_NP, reg, &val);
+
+	return val;
+}
+
+void intel_iosf_sb_write(uint32_t port, uint32_t reg, uint32_t val)
+{
+	vlv_sideband_rw(port, SB_CRWRDA_NP, reg, &val);
+}