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u-boot/drivers/usb/musb-new/mt85xx.c
Simon Glass 8a8d24bdf1 dm: treewide: Rename ..._platdata variables to just ..._plat 
Try to maintain some consistency between these variables by using _plat as
a suffix for them.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:09 -07:00

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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
.plat_auto = sizeof(struct usb_plat),
.priv_auto = sizeof(struct mtk_musb_glue),
};
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