--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Mediatek "glue layer"
+ *
+ * Copyright (C) 2019-2021 by Mediatek
+ * Based on the AllWinner SUNXI "glue layer" code.
+ * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
+ * Copyright (C) 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
+ *
+ * This file is part of the Inventra Controller Driver for Linux.
+ */
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <dm/lists.h>
+#include <dm/root.h>
+#include <linux/usb/musb.h>
+#include <usb.h>
+#include "linux-compat.h"
+#include "musb_core.h"
+#include "musb_uboot.h"
+
+#define DBG_I(fmt, ...) \
+ pr_info(fmt, ##__VA_ARGS__)
+
+struct mtk_musb_config {
+ struct musb_hdrc_config *config;
+};
+
+struct mtk_musb_glue {
+ struct musb_host_data mdata;
+ struct clk usbpllclk;
+ struct clk usbmcuclk;
+ struct clk usbclk;
+ struct mtk_musb_config *cfg;
+ struct device dev;
+};
+
+#define to_mtk_musb_glue(d) container_of(d, struct mtk_musb_glue, dev)
+
+/******************************************************************************
+ * phy settings
+ ******************************************************************************/
+#define USB20_PHY_BASE 0x11110800
+#define USBPHY_READ8(offset) \
+ readb((void *)(USB20_PHY_BASE + (offset)))
+#define USBPHY_WRITE8(offset, value) \
+ writeb(value, (void *)(USB20_PHY_BASE + (offset)))
+#define USBPHY_SET8(offset, mask) \
+ USBPHY_WRITE8(offset, (USBPHY_READ8(offset)) | (mask))
+#define USBPHY_CLR8(offset, mask) \
+ USBPHY_WRITE8(offset, (USBPHY_READ8(offset)) & (~(mask)))
+
+static void mt_usb_phy_poweron(void)
+{
+ /*
+ * switch to USB function.
+ * (system register, force ip into usb mode).
+ */
+ USBPHY_CLR8(0x6b, 0x04);
+ USBPHY_CLR8(0x6e, 0x01);
+ USBPHY_CLR8(0x21, 0x03);
+
+ /* RG_USB20_BC11_SW_EN = 1'b0 */
+ USBPHY_SET8(0x22, 0x04);
+ USBPHY_CLR8(0x1a, 0x80);
+
+ /* RG_USB20_DP_100K_EN = 1'b0 */
+ /* RG_USB20_DP_100K_EN = 1'b0 */
+ USBPHY_CLR8(0x22, 0x03);
+
+ /*OTG enable*/
+ USBPHY_SET8(0x20, 0x10);
+ /* release force suspendm */
+ USBPHY_CLR8(0x6a, 0x04);
+
+ mdelay(800);
+
+ /* force enter device mode */
+ USBPHY_CLR8(0x6c, 0x10);
+ USBPHY_SET8(0x6c, 0x2E);
+ USBPHY_SET8(0x6d, 0x3E);
+}
+
+static void mt_usb_phy_savecurrent(void)
+{
+ /*
+ * switch to USB function.
+ * (system register, force ip into usb mode).
+ */
+ USBPHY_CLR8(0x6b, 0x04);
+ USBPHY_CLR8(0x6e, 0x01);
+ USBPHY_CLR8(0x21, 0x03);
+
+ /* release force suspendm */
+ USBPHY_CLR8(0x6a, 0x04);
+ USBPHY_SET8(0x68, 0x04);
+ /* RG_DPPULLDOWN./RG_DMPULLDOWN. */
+ USBPHY_SET8(0x68, 0xc0);
+ /* RG_XCVRSEL[1:0] = 2'b01 */
+ USBPHY_CLR8(0x68, 0x30);
+ USBPHY_SET8(0x68, 0x10);
+ /* RG_TERMSEL = 1'b1 */
+ USBPHY_SET8(0x68, 0x04);
+ /* RG_DATAIN[3:0] = 4'b0000 */
+ USBPHY_CLR8(0x69, 0x3c);
+
+ /*
+ * force_dp_pulldown, force_dm_pulldown,
+ * force_xcversel, force_termsel.
+ */
+ USBPHY_SET8(0x6a, 0xba);
+
+ /* RG_USB20_BC11_SW_EN = 1'b0 */
+ USBPHY_CLR8(0x1a, 0x80);
+ /* RG_USB20_OTG_VBUSSCMP_EN = 1'b0 */
+ USBPHY_CLR8(0x1a, 0x10);
+
+ mdelay(800);
+
+ USBPHY_CLR8(0x6a, 0x04);
+ /* rg_usb20_pll_stable = 1 */
+ //USBPHY_SET8(0x63, 0x02);
+
+ mdelay(1);
+
+ /* force suspendm = 1 */
+ //USBPHY_SET8(0x6a, 0x04);
+}
+
+static void mt_usb_phy_recover(void)
+{
+ /* clean PUPD_BIST_EN */
+ /* PUPD_BIST_EN = 1'b0 */
+ /* PMIC will use it to detect charger type */
+ USBPHY_CLR8(0x1d, 0x10);
+
+ /* force_uart_en = 1'b0 */
+ USBPHY_CLR8(0x6b, 0x04);
+ /* RG_UART_EN = 1'b0 */
+ USBPHY_CLR8(0x6e, 0x01);
+ /* force_uart_en = 1'b0 */
+ USBPHY_CLR8(0x6a, 0x04);
+
+ USBPHY_CLR8(0x21, 0x03);
+ USBPHY_CLR8(0x68, 0xf4);
+
+ /* RG_DATAIN[3:0] = 4'b0000 */
+ USBPHY_CLR8(0x69, 0x3c);
+
+ USBPHY_CLR8(0x6a, 0xba);
+
+ /* RG_USB20_BC11_SW_EN = 1'b0 */
+ USBPHY_CLR8(0x1a, 0x80);
+ /* RG_USB20_OTG_VBUSSCMP_EN = 1'b1 */
+ USBPHY_SET8(0x1a, 0x10);
+
+ //HQA adjustment
+ USBPHY_CLR8(0x18, 0x08);
+ USBPHY_SET8(0x18, 0x06);
+ mdelay(800);
+
+ /* force enter device mode */
+ //USBPHY_CLR8(0x6c, 0x10);
+ //USBPHY_SET8(0x6c, 0x2E);
+ //USBPHY_SET8(0x6d, 0x3E);
+
+ /* enable VRT internal R architecture */
+ /* RG_USB20_INTR_EN = 1'b1 */
+ USBPHY_SET8(0x00, 0x20);
+}
+
+/******************************************************************************
+ * MUSB Glue code
+ ******************************************************************************/
+
+static irqreturn_t mtk_musb_interrupt(int irq, void *__hci)
+{
+ struct musb *musb = __hci;
+ irqreturn_t retval = IRQ_NONE;
+
+ /* read and flush interrupts */
+ musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
+// last_int_usb = musb->int_usb;
+ if (musb->int_usb)
+ musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
+ musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
+ if (musb->int_tx)
+ musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx);
+ musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
+ if (musb->int_rx)
+ musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx);
+
+ if (musb->int_usb || musb->int_tx || musb->int_rx)
+ retval |= musb_interrupt(musb);
+
+ return retval;
+}
+
+/* musb_core does not call enable / disable in a balanced manner <sigh> */
+static bool enabled;
+
+static int mtk_musb_enable(struct musb *musb)
+{
+ struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);
+
+ DBG_I("%s():\n", __func__);
+
+ musb_ep_select(musb->mregs, 0);
+ musb_writeb(musb->mregs, MUSB_FADDR, 0);
+
+ if (enabled)
+ return 0;
+
+ mt_usb_phy_recover();
+
+ enabled = true;
+
+ return 0;
+}
+
+static void mtk_musb_disable(struct musb *musb)
+{
+ struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);
+ int ret;
+
+ DBG_I("%s():\n", __func__);
+
+ if (!enabled)
+ return;
+
+ mt_usb_phy_savecurrent();
+
+ enabled = false;
+}
+
+static int mtk_musb_init(struct musb *musb)
+{
+ struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);
+ int ret;
+
+ DBG_I("%s():\n", __func__);
+
+ ret = clk_enable(&glue->usbpllclk);
+ if (ret) {
+ dev_err(dev, "failed to enable usbpll clock\n");
+ return ret;
+ }
+ ret = clk_enable(&glue->usbmcuclk);
+ if (ret) {
+ dev_err(dev, "failed to enable usbmcu clock\n");
+ return ret;
+ }
+ ret = clk_enable(&glue->usbclk);
+ if (ret) {
+ dev_err(dev, "failed to enable usb clock\n");
+ return ret;
+ }
+
+ musb->isr = mtk_musb_interrupt;
+
+ return 0;
+}
+
+static int mtk_musb_exit(struct musb *musb)
+{
+ struct mtk_musb_glue *glue = to_mtk_musb_glue(musb->controller);
+
+ clk_disable(&glue->usbclk);
+ clk_disable(&glue->usbmcuclk);
+ clk_disable(&glue->usbpllclk);
+
+ return 0;
+}
+
+static const struct musb_platform_ops mtk_musb_ops = {
+ .init = mtk_musb_init,
+ .exit = mtk_musb_exit,
+ .enable = mtk_musb_enable,
+ .disable = mtk_musb_disable,
+};
+
+/* MTK OTG supports up to 7 endpoints */
+#define MTK_MUSB_MAX_EP_NUM 8
+#define MTK_MUSB_RAM_BITS 16
+
+static struct musb_fifo_cfg mtk_musb_mode_cfg[] = {
+ MUSB_EP_FIFO_SINGLE(1, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(1, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(2, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(2, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(3, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(3, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(4, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(4, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(5, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(5, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(6, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(6, FIFO_RX, 512),
+ MUSB_EP_FIFO_SINGLE(7, FIFO_TX, 512),
+ MUSB_EP_FIFO_SINGLE(7, FIFO_RX, 512),
+};
+
+static struct musb_hdrc_config musb_config = {
+ .fifo_cfg = mtk_musb_mode_cfg,
+ .fifo_cfg_size = ARRAY_SIZE(mtk_musb_mode_cfg),
+ .multipoint = true,
+ .dyn_fifo = true,
+ .num_eps = MTK_MUSB_MAX_EP_NUM,
+ .ram_bits = MTK_MUSB_RAM_BITS,
+};
+
+static int musb_usb_probe(struct udevice *dev)
+{
+ struct mtk_musb_glue *glue = dev_get_priv(dev);
+ struct musb_host_data *host = &glue->mdata;
+ struct musb_hdrc_platform_data pdata;
+ void *base = dev_read_addr_ptr(dev);
+ int ret;
+
+ DBG_I("%s():\n", __func__);
+
+#ifdef CONFIG_USB_MUSB_HOST
+ struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
+#endif
+
+ if (!base)
+ return -EINVAL;
+
+ glue->cfg = (struct mtk_musb_config *)dev_get_driver_data(dev);
+ if (!glue->cfg)
+ return -EINVAL;
+
+ ret = clk_get_by_name(dev, "usbpll", &glue->usbpllclk);
+ if (ret) {
+ dev_err(dev, "failed to get usbpll clock\n");
+ return ret;
+ }
+ ret = clk_get_by_name(dev, "usbmcu", &glue->usbmcuclk);
+ if (ret) {
+ dev_err(dev, "failed to get usbmcu clock\n");
+ return ret;
+ }
+ ret = clk_get_by_name(dev, "usb", &glue->usbclk);
+ if (ret) {
+ dev_err(dev, "failed to get usb clock\n");
+ return ret;
+ }
+
+ memset(&pdata, 0, sizeof(pdata));
+ pdata.power = (u8)400;
+ pdata.platform_ops = &mtk_musb_ops;
+ pdata.config = glue->cfg->config;
+
+#ifdef CONFIG_USB_MUSB_HOST
+ priv->desc_before_addr = true;
+
+ pdata.mode = MUSB_HOST;
+ host->host = musb_init_controller(&pdata, &glue->dev, base);
+ if (!host->host)
+ return -EIO;
+
+ ret = musb_lowlevel_init(host);
+ if (!ret)
+ printf("MTK MUSB OTG (Host)\n");
+#else
+ pdata.mode = MUSB_PERIPHERAL;
+ host->host = musb_register(&pdata, &glue->dev, base);
+ if (!host->host)
+ return -EIO;
+
+ printf("MTK MUSB OTG (Peripheral)\n");
+#endif
+
+ mt_usb_phy_poweron();
+
+ return ret;
+}
+
+static int musb_usb_remove(struct udevice *dev)
+{
+ struct mtk_musb_glue *glue = dev_get_priv(dev);
+ struct musb_host_data *host = &glue->mdata;
+
+ musb_stop(host->host);
+ free(host->host);
+ host->host = NULL;
+
+ return 0;
+}
+
+static const struct mtk_musb_config mt8518_cfg = {
+ .config = &musb_config,
+};
+
+static const struct udevice_id mtk_musb_ids[] = {
+ { .compatible = "mediatek,mt8518-musb",
+ .data = (ulong)&mt8518_cfg },
+ { }
+};
+
+U_BOOT_DRIVER(mtk_musb) = {
+ .name = "mtk_musb",
+#ifdef CONFIG_USB_MUSB_HOST
+ .id = UCLASS_USB,
+#else
+ .id = UCLASS_USB_GADGET_GENERIC,
+#endif
+ .of_match = mtk_musb_ids,
+ .probe = musb_usb_probe,
+ .remove = musb_usb_remove,
+#ifdef CONFIG_USB_MUSB_HOST
+ .ops = &musb_usb_ops,
+#endif
+ .platdata_auto_alloc_size = sizeof(struct usb_platdata),
+ .priv_auto_alloc_size = sizeof(struct mtk_musb_glue),
+};
projects / u-boot.git / commitdiff