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u-boot/drivers/usb/musb-new/mt85xx.c
Simon Glass caa4daa2ae dm: treewide: Rename 'platdata' variables to just 'plat' 
We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).

Rename some of the latter variables to end with 'plat' for consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:08 -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_platdata),
.priv_auto = sizeof(struct mtk_musb_glue),
};
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