Add support for writing PS key values

2 files changed, 59 insertions, 2 deletions

diff --git a/tools/csr.c b/tools/csr.c
index c646ebde..a155efcb 100644
--- a/tools/csr.c
+++ b/tools/csr.c
@@ -374,6 +374,18 @@ char *csr_chipvertostr(uint16_t ver, uint16_t rev)
 	}
 }
 
+char *csr_pskeytostr(uint16_t pskey)
+{
+	switch (pskey) {
+	case CSR_PSKEY_HOSTIO_MAP_SCO_PCM:
+		return "Map SCO over PCM";
+	case CSR_PSKEY_INITIAL_BOOTMODE:
+		return "Initial device bootmode";
+	default:
+		return "Unknown";
+	}
+}
+
 int csr_read_varid_uint16(int dd, uint16_t seqnum, uint16_t varid, uint16_t *value)
 {
 	unsigned char cmd[] = { 0x00, 0x00, 0x09, 0x00,
@@ -404,8 +416,10 @@ int csr_read_varid_uint16(int dd, uint16_t seqnum, uint16_t varid, uint16_t *val
 		return -1;
 	}
 
-	if ((rp[9] + (rp[10] << 8)) != 0)
+	if ((rp[9] + (rp[10] << 8)) != 0) {
+		errno = ENXIO;
 		return -1;
+	}
 
 	*value = rp[11] + (rp[12] << 8);
 
@@ -442,10 +456,51 @@ int csr_read_pskey_uint16(int dd, uint16_t seqnum, uint16_t pskey, uint16_t *val
 		return -1;
 	}
 
-	if ((rp[9] + (rp[10] << 8)) != 0)
+	if ((rp[9] + (rp[10] << 8)) != 0) {
+		errno = ENXIO;
 		return -1;
+	}
 
 	*value = rp[17] + (rp[18] << 8);
 
 	return 0;
 }
+
+int csr_write_pskey_uint16(int dd, uint16_t seqnum, uint16_t pskey, uint16_t value)
+{
+	unsigned char cmd[] = { 0x02, 0x00, 0x09, 0x00,
+				seqnum & 0xff, seqnum >> 8, 0x03, 0x70, 0x00, 0x00,
+				pskey & 0xff, pskey >> 8, 0x01, 0x00, 0x00, 0x00,
+				value & 0xff, value >> 8 };
+
+	unsigned char cp[254], rp[254];
+	struct hci_request rq;
+
+	memset(&cp, 0, sizeof(cp));
+	cp[0] = 0xc2;
+	memcpy(cp + 1, cmd, sizeof(cmd));
+
+	memset(&rq, 0, sizeof(rq));
+	rq.ogf    = OGF_VENDOR_CMD;
+	rq.ocf    = 0x00;
+	rq.event  = EVT_VENDOR;
+	rq.cparam = cp;
+	rq.clen   = sizeof(cmd) + 1;
+	rq.rparam = rp;
+	rq.rlen   = sizeof(rp);
+
+	if (hci_send_req(dd, &rq, 2000) < 0)
+		return -1;
+
+	if (rp[0] != 0xc2) {
+		errno = EIO;
+		return -1;
+	}
+
+	if ((rp[9] + (rp[10] << 8)) != 0) {
+		errno = ENXIO;
+		return -1;
+	}
+
+	return 0;
+}
diff --git a/tools/csr.h b/tools/csr.h
index 72d4cc4a..79795be0 100644
--- a/tools/csr.h
+++ b/tools/csr.h
@@ -39,6 +39,8 @@
 
 char *csr_buildidtostr(uint16_t id);
 char *csr_chipvertostr(uint16_t ver, uint16_t rev);
+char *csr_pskeytostr(uint16_t pskey);
 
 int csr_read_varid_uint16(int dd, uint16_t seqnum, uint16_t varid, uint16_t *value);
 int csr_read_pskey_uint16(int dd, uint16_t seqnum, uint16_t pskey, uint16_t *value);
+int csr_write_pskey_uint16(int dd, uint16_t seqnum, uint16_t pskey, uint16_t value);