Add qcsdam(4), a driver for the PMIC Shared Direct Access Memory found on

Qualcomm SoCs.

ok kettenis@

diff --git a/sys/arch/arm64/conf/GENERIC b/sys/arch/arm64/conf/GENERIC
index 7b8e6a1..3b6bc19 100644 (file)
--- a/sys/arch/arm64/conf/GENERIC
+++ b/sys/arch/arm64/conf/GENERIC
@@ -1,4 +1,4 @@
-# $OpenBSD: GENERIC,v 1.276 2023/07/19 20:27:20 kettenis Exp $
+# $OpenBSD: GENERIC,v 1.277 2023/07/22 22:43:53 patrick Exp $
 #
 # GENERIC machine description file
 #
@@ -343,6 +343,7 @@ qcpon*              at qcpmic?
 qcpwm*         at qcpmic?
 qcrng*         at fdt?
 qcrtc*         at qcpmic?
+qcsdam*                at qcpmic?
 
 # Sunxi SoCs
 sxipio*                at fdt? early 1 # GPIO pins for leds & PHYs

diff --git a/sys/arch/arm64/conf/RAMDISK b/sys/arch/arm64/conf/RAMDISK
index 860174c..a22db00 100644 (file)
--- a/sys/arch/arm64/conf/RAMDISK
+++ b/sys/arch/arm64/conf/RAMDISK
@@ -1,4 +1,4 @@
-# $OpenBSD: RAMDISK,v 1.208 2023/07/19 20:27:20 kettenis Exp $
+# $OpenBSD: RAMDISK,v 1.209 2023/07/22 22:43:53 patrick Exp $
 
 machine                arm64
 maxusers       4
@@ -266,6 +266,7 @@ qcpon*              at qcpmic?
 qcpwm*         at qcpmic?
 qcrng*         at fdt?
 qcrtc*         at qcpmic?
+qcsdam*                at qcpmic?
 
 # Sunxi SoCs
 sxipio*                at fdt? early 1 # GPIO pins for leds & PHYs

diff --git a/sys/dev/fdt/files.fdt b/sys/dev/fdt/files.fdt
index fa34dd4..af80b6d 100644 (file)
--- a/sys/dev/fdt/files.fdt
+++ b/sys/dev/fdt/files.fdt
@@ -1,4 +1,4 @@
-#      $OpenBSD: files.fdt,v 1.195 2023/07/01 16:34:30 drahn Exp $
+#      $OpenBSD: files.fdt,v 1.196 2023/07/22 22:43:53 patrick Exp $
 #
 # Config file and device description for machine-independent FDT code.
 # Included by ports that need it.
@@ -761,6 +761,11 @@ device     qcrtc
 attach qcrtc at spmi
 file   dev/fdt/qcrtc.c                 qcrtc
 
+# Qualcomm PMIC Shared Direct Access Memory
+device qcsdam
+attach qcsdam at spmi
+file   dev/fdt/qcsdam.c                qcsdam
+
 # TI TPS6598x Type-C controller
 device tipd
 attach tipd at i2c

diff --git a/sys/dev/fdt/qcsdam.c b/sys/dev/fdt/qcsdam.c
new file mode 100644 (file)
index 0000000..309c889
--- /dev/null
+++ b/sys/dev/fdt/qcsdam.c
@@ -0,0 +1,119 @@
+/*     $OpenBSD: qcsdam.c,v 1.1 2023/07/22 22:43:53 patrick Exp $      */
+/*
+ * Copyright (c) 2023 Patrick Wildt <patrick@blueri.se>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/device.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+
+#include <dev/fdt/spmivar.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_misc.h>
+#include <dev/ofw/fdt.h>
+
+struct qcsdam_softc {
+       struct device           sc_dev;
+       spmi_tag_t              sc_tag;
+       int8_t                  sc_sid;
+       uint16_t                sc_addr;
+
+       struct nvmem_device     sc_nd;
+};
+
+int qcsdam_match(struct device *, void *, void *);
+void qcsdam_attach(struct device *, struct device *, void *);
+
+const struct cfattach  qcsdam_ca = {
+       sizeof (struct qcsdam_softc), qcsdam_match, qcsdam_attach
+};
+
+struct cfdriver qcsdam_cd = {
+       NULL, "qcsdam", DV_DULL
+};
+
+int    qcsdam_nvmem_read(void *, bus_addr_t, void *, bus_size_t);
+int    qcsdam_nvmem_write(void *, bus_addr_t, const void *, bus_size_t);
+
+int
+qcsdam_match(struct device *parent, void *match, void *aux)
+{
+       struct spmi_attach_args *saa = aux;
+
+       return OF_is_compatible(saa->sa_node, "qcom,spmi-sdam");
+}
+
+void
+qcsdam_attach(struct device *parent, struct device *self, void *aux)
+{
+       struct qcsdam_softc *sc = (struct qcsdam_softc *)self;
+       struct spmi_attach_args *saa = aux;
+       uint32_t reg;
+
+       if (OF_getpropintarray(saa->sa_node, "reg",
+           &reg, sizeof(reg)) != sizeof(reg)) {
+               printf(": can't find registers\n");
+               return;
+       }
+
+       sc->sc_tag = saa->sa_tag;
+       sc->sc_sid = saa->sa_sid;
+       sc->sc_addr = reg;
+
+       printf("\n");
+
+       sc->sc_nd.nd_node = saa->sa_node;
+       sc->sc_nd.nd_cookie = sc;
+       sc->sc_nd.nd_read = qcsdam_nvmem_read;
+       sc->sc_nd.nd_write = qcsdam_nvmem_write;
+       nvmem_register(&sc->sc_nd);
+}
+
+int
+qcsdam_nvmem_read(void *cookie, bus_addr_t addr, void *data, bus_size_t size)
+{
+       struct qcsdam_softc *sc = cookie;
+       int error;
+
+       error = spmi_cmd_read(sc->sc_tag, sc->sc_sid, SPMI_CMD_EXT_READL,
+           sc->sc_addr + addr, data, size);
+       if (error) {
+               printf("%s: error reading NVMEM\n", sc->sc_dev.dv_xname);
+               return error;
+       }
+
+       return 0;
+}
+
+int
+qcsdam_nvmem_write(void *cookie, bus_addr_t addr, const void *data,
+    bus_size_t size)
+{
+       struct qcsdam_softc *sc = cookie;
+       int error;
+
+       error = spmi_cmd_write(sc->sc_tag, sc->sc_sid, SPMI_CMD_EXT_WRITEL,
+           sc->sc_addr + addr, data, size);
+       if (error) {
+               printf("%s: error reading NVMEM\n", sc->sc_dev.dv_xname);
+               return error;
+       }
+
+       return 0;
+}