usb: gadget: usbhs: Add Renesas USBHS device driver
Add UDC driver for Renesas USBHS controller found in R-Car Gen3 SoCs.
This is mostly ported from the Linux kernel, with additional porting
glue. The code has been synchronized with 1b4861e32e46 ("Linux 6.9.3")
and cleaned up and ported to DM since the original implementation by
Vitaliy.
Signed-off-by: Vitaliy Vasylskyy <vitaliy.vasylskyy@globallogic.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20240908230654.286062-1-marek.vasut+renesas@mailbox.org
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
diff --git a/drivers/usb/gadget/rcar/renesas_usb.h b/drivers/usb/gadget/rcar/renesas_usb.h
new file mode 100644
index 0000000..8155e3d
--- /dev/null
+++ b/drivers/usb/gadget/rcar/renesas_usb.h
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-1.0+
+/*
+ * Renesas USB
+ *
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ *
+ * Ported to u-boot
+ * Copyright (C) 2016 GlobalLogic
+ */
+#ifndef RENESAS_USB_H
+#define RENESAS_USB_H
+
+#include <linux/usb/ch9.h>
+#include <linux/compat.h>
+
+struct platform_device {
+ const char *name;
+ struct device dev;
+};
+
+/*
+ * module type
+ *
+ * it will be return value from get_id
+ */
+enum {
+ USBHS_HOST = 0,
+ USBHS_GADGET,
+ USBHS_MAX,
+};
+
+/*
+ * parameters for renesas usbhs
+ *
+ * some register needs USB chip specific parameters.
+ * This struct show it to driver
+ */
+
+struct renesas_usbhs_driver_pipe_config {
+ u8 type; /* USB_ENDPOINT_XFER_xxx */
+ u16 bufsize;
+ u8 bufnum;
+ bool double_buf;
+};
+#define RENESAS_USBHS_PIPE(_type, _size, _num, _double_buf) { \
+ .type = (_type), \
+ .bufsize = (_size), \
+ .bufnum = (_num), \
+ .double_buf = (_double_buf), \
+ }
+
+struct renesas_usbhs_driver_param {
+ /*
+ * pipe settings
+ */
+ struct renesas_usbhs_driver_pipe_config *pipe_configs;
+ int pipe_size; /* pipe_configs array size */
+
+ /*
+ * option:
+ *
+ * for BUSWAIT :: BWAIT
+ * see
+ * renesas_usbhs/common.c :: usbhsc_set_buswait()
+ * */
+ int buswait_bwait;
+
+ /*
+ * option:
+ *
+ * delay time from notify_hotplug callback
+ */
+ int detection_delay; /* msec */
+
+ /*
+ * option:
+ *
+ * dma id for dmaengine
+ * The data transfer direction on D0FIFO/D1FIFO should be
+ * fixed for keeping consistency.
+ * So, the platform id settings will be..
+ * .d0_tx_id = xx_TX,
+ * .d1_rx_id = xx_RX,
+ * or
+ * .d1_tx_id = xx_TX,
+ * .d0_rx_id = xx_RX,
+ */
+ int d0_tx_id;
+ int d0_rx_id;
+ int d1_tx_id;
+ int d1_rx_id;
+ int d2_tx_id;
+ int d2_rx_id;
+ int d3_tx_id;
+ int d3_rx_id;
+
+ /*
+ * option:
+ *
+ * pio <--> dma border.
+ */
+ int pio_dma_border; /* default is 64byte */
+
+ uintptr_t type;
+ u32 enable_gpio;
+
+ /*
+ * option:
+ */
+ u32 has_otg:1; /* for controlling PWEN/EXTLP */
+ u32 has_sudmac:1; /* for SUDMAC */
+ u32 has_usb_dmac:1; /* for USB-DMAC */
+ u32 cfifo_byte_addr:1; /* CFIFO is byte addressable */
+#define USBHS_USB_DMAC_XFER_SIZE 32 /* hardcode the xfer size */
+ u32 multi_clks:1;
+ u32 has_new_pipe_configs:1;
+};
+
+#define USBHS_TYPE_RCAR_GEN3 2
+
+struct usbhs_priv;
+struct usb_gadget *usbhsg_get_gadget(struct usbhs_priv *priv);
+
+#endif /* RENESAS_USB_H */