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- // 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/device_compat.h>
- #include <dm/lists.h>
- #include <dm/root.h>
- #include <linux/delay.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(musb->controller, "failed to enable usbpll clock\n");
- return ret;
- }
- ret = clk_enable(&glue->usbmcuclk);
- if (ret) {
- dev_err(musb->controller, "failed to enable usbmcu clock\n");
- return ret;
- }
- ret = clk_enable(&glue->usbclk);
- if (ret) {
- dev_err(musb->controller, "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),
- };
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