dcp/dpav: Add DPAV endpoint

Signed-off-by: Janne Grunau <j@jannau.net>

Makefile

@@ -74,6 +74,7 @@ LIBFDT_OBJECTS := $(patsubst %,libfdt/%, \
 	fdt_wip.o fdt.o)
 
 DCP_OBJECTS := $(patsubst %,dcp/%, \
+	dpav_ep.o \
 	dptx_phy.o \
 	dptx_port_ep.o \
 	parser.o)

src/dcp/dpav_ep.c

@@ -0,0 +1,78 @@
+
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/* Copyright 2022 Sven Peter <sven@svenpeter.dev> */
+
+#include <stdbool.h>
+#include <string.h>
+
+#include "dpav_ep.h"
+#include "malloc.h"
+#include "parser.h"
+
+#include "../afk.h"
+#include "../dcp.h"
+#include "../types.h"
+#include "../utils.h"
+
+#define DCP_DPAV_ENDPOINT 0x24
+#define TXBUF_LEN         0x4000
+#define RXBUF_LEN         0x4000
+
+typedef struct dcp_dpav_if {
+    afk_epic_ep_t *epic;
+    dcp_dev_t *dcp;
+} dcp_dpav_if_t;
+
+static void dpav_init(afk_epic_service_t *service, const char *name, const char *eclass, s64 unit)
+{
+    UNUSED(service);
+    UNUSED(name);
+    UNUSED(eclass);
+    UNUSED(unit);
+    // printf("DPAV: init(name='%s', class='%s' unit=%ld:\n", name, eclass, unit);
+}
+
+static const afk_epic_service_ops_t dcp_dpav_ops[] = {
+    {
+        .name = "AppleDCPDPTXController",
+        .init = dpav_init,
+    },
+    {},
+};
+
+dcp_dpav_if_t *dcp_dpav_init(dcp_dev_t *dcp)
+{
+    dcp_dpav_if_t *dpav = malloc(sizeof(dcp_dpav_if_t));
+    if (!dpav)
+        return NULL;
+
+    dpav->dcp = dcp;
+    dpav->epic = afk_epic_start_ep(dcp->afk, DCP_DPAV_ENDPOINT, dcp_dpav_ops, true);
+    if (!dpav->epic) {
+        printf("dpav: failed to initialize EPIC\n");
+        goto err_free;
+    }
+
+    int err = afk_epic_start_interface(dpav->epic, dpav, TXBUF_LEN, RXBUF_LEN);
+    if (err < 0) {
+        printf("dpav: failed to initialize DPAV interface\n");
+        goto err_shutdown;
+    }
+
+    return dpav;
+
+err_shutdown:
+    afk_epic_shutdown_ep(dpav->epic);
+err_free:
+    free(dpav);
+    return NULL;
+}
+
+int dcp_dpav_shutdown(dcp_dpav_if_t *dpav)
+{
+    if (dpav) {
+        afk_epic_shutdown_ep(dpav->epic);
+        free(dpav);
+    }
+    return 0;
+}

src/dcp/dpav_ep.h

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0-only OR MIT
+/* Copyright 2023 Janne Grunau <j@jannau.net> */
+
+#ifndef __APPLE_DCP_DPAV_EP_H__
+#define __APPLE_DCP_DPAV_EP_H__
+
+#include "../types.h"
+
+typedef struct dcp_dev dcp_dev_t;
+
+typedef struct dcp_dpav_if dcp_dpav_if_t;
+
+dcp_dpav_if_t *dcp_dpav_init(dcp_dev_t *dcp);
+int dcp_dpav_shutdown(dcp_dpav_if_t *dpav);
+
+#endif