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u-boot/drivers/usb/host/xhci-mtk.c
Chunfeng Yun b2eff0340d usb: xhci-mtk: modify the SOF/ITP interval for mt8195 
There are 4 USB controllers on MT8195, the controllers (IP1~IP3,
exclude IP0) have a wrong default SOF/ITP interval which is
calculated from the frame counter clock 24Mhz by default, but
in fact, the frame counter clock is 48Mhz, so we shall set the
accurate interval according to 48Mhz for those controllers.

Note:
The first controller no need set it, but if set it, shall change
tphy's pll at the same time.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Reviewed-by: Marek Vasut <marex@denx.de>
2023-03-02 22:43:43 +01:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2019 MediaTek, Inc.
* Authors: Chunfeng Yun <chunfeng.yun@mediatek.com>
*/
#include <clk.h>
#include <common.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
#include <generic-phy.h>
#include <malloc.h>
#include <power/regulator.h>
#include <usb.h>
#include <usb/xhci.h>
#include <linux/bitfield.h>
#include <linux/compat.h>
#include <linux/errno.h>
#include <linux/iopoll.h>
/* IPPC (IP Port Control) registers */
#define IPPC_IP_PW_CTRL0 0x00
#define CTRL0_IP_SW_RST BIT(0)
#define IPPC_IP_PW_CTRL1 0x04
#define CTRL1_IP_HOST_PDN BIT(0)
#define IPPC_IP_PW_STS1 0x10
#define STS1_IP_SLEEP_STS BIT(30)
#define STS1_U3_MAC_RST BIT(16)
#define STS1_XHCI_RST BIT(11)
#define STS1_SYS125_RST BIT(10)
#define STS1_REF_RST BIT(8)
#define STS1_SYSPLL_STABLE BIT(0)
#define IPPC_IP_XHCI_CAP 0x24
#define CAP_U3_PORT_NUM(p) ((p) & 0xff)
#define CAP_U2_PORT_NUM(p) (((p) >> 8) & 0xff)
#define IPPC_U3_CTRL_0P 0x30
#define CTRL_U3_PORT_HOST_SEL BIT(2)
#define CTRL_U3_PORT_PDN BIT(1)
#define CTRL_U3_PORT_DIS BIT(0)
#define IPPC_U2_CTRL_0P 0x50
#define CTRL_U2_PORT_HOST_SEL BIT(2)
#define CTRL_U2_PORT_PDN BIT(1)
#define CTRL_U2_PORT_DIS BIT(0)
#define IPPC_U3_CTRL(p) (IPPC_U3_CTRL_0P + ((p) * 0x08))
#define IPPC_U2_CTRL(p) (IPPC_U2_CTRL_0P + ((p) * 0x08))
/* xHCI CSR */
#define LS_EOF_CFG 0x930
#define LSEOF_OFFSET 0x89
#define FS_EOF_CFG 0x934
#define FSEOF_OFFSET 0x2e
#define SS_GEN1_EOF_CFG 0x93c
#define SSG1EOF_OFFSET 0x78
#define HFCNTR_CFG 0x944
#define ITP_DELTA_CLK_MASK GENMASK(5, 1)
#define FRMCNT_LEV1_RANG_MASK GENMASK(19, 8)
#define SS_GEN2_EOF_CFG 0x990
#define SSG2EOF_OFFSET 0x3c
#define XSEOF_OFFSET_MASK GENMASK(11, 0)
struct mtk_xhci {
struct xhci_ctrl ctrl; /* Needs to come first in this struct! */
struct xhci_hccr *hcd;
void __iomem *ippc;
struct udevice *dev;
struct udevice *vusb33_supply;
struct udevice *vbus_supply;
struct clk_bulk clks;
struct phy_bulk phys;
int num_u2ports;
int num_u3ports;
u32 u3p_dis_msk;
u32 u2p_dis_msk;
};
/*
* workaround for mt8195:
* MT8195 has 4 controllers, the controller1~3's default SOF/ITP interval
* is calculated from the frame counter clock 24M, but in fact, the clock
* is 48M.
*/
static void xhci_mtk_set_frame_interval(struct mtk_xhci *mtk)
{
void __iomem *mac = (void __iomem *)mtk->hcd;
if (!ofnode_device_is_compatible(dev_ofnode(mtk->dev), "mediatek,mt8195-xhci"))
return;
clrsetbits_le32(mac + HFCNTR_CFG,
ITP_DELTA_CLK_MASK | FRMCNT_LEV1_RANG_MASK,
FIELD_PREP(ITP_DELTA_CLK_MASK, 0xa) |
FIELD_PREP(FRMCNT_LEV1_RANG_MASK, 0x12b));
clrsetbits_le32(mac + LS_EOF_CFG, XSEOF_OFFSET_MASK, LSEOF_OFFSET);
clrsetbits_le32(mac + FS_EOF_CFG, XSEOF_OFFSET_MASK, FSEOF_OFFSET);
clrsetbits_le32(mac + SS_GEN1_EOF_CFG, XSEOF_OFFSET_MASK, SSG1EOF_OFFSET);
clrsetbits_le32(mac + SS_GEN2_EOF_CFG, XSEOF_OFFSET_MASK, SSG2EOF_OFFSET);
}
static int xhci_mtk_host_enable(struct mtk_xhci *mtk)
{
int u3_ports_disabed = 0;
u32 value;
u32 check_val;
int ret;
int i;
/* power on host ip */
clrbits_le32(mtk->ippc + IPPC_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);
/* power on and enable u3 ports except skipped ones */
for (i = 0; i < mtk->num_u3ports; i++) {
if (BIT(i) & mtk->u3p_dis_msk) {
u3_ports_disabed++;
continue;
}
clrsetbits_le32(mtk->ippc + IPPC_U3_CTRL(i),
CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS,
CTRL_U3_PORT_HOST_SEL);
}
/* power on and enable u2 ports except skipped ones */
for (i = 0; i < mtk->num_u2ports; i++) {
if (BIT(i) & mtk->u2p_dis_msk)
continue;
clrsetbits_le32(mtk->ippc + IPPC_U2_CTRL(i),
CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS,
CTRL_U2_PORT_HOST_SEL);
}
/*
* wait for clocks to be stable, and clock domains reset to
* be inactive after power on and enable ports
*/
check_val = STS1_SYSPLL_STABLE | STS1_REF_RST |
STS1_SYS125_RST | STS1_XHCI_RST;
if (mtk->num_u3ports > u3_ports_disabed)
check_val |= STS1_U3_MAC_RST;
ret = readl_poll_timeout(mtk->ippc + IPPC_IP_PW_STS1, value,
(check_val == (value & check_val)), 20000);
if (ret)
dev_err(mtk->dev, "clocks are not stable 0x%x!\n", value);
return ret;
}
static int xhci_mtk_host_disable(struct mtk_xhci *mtk)
{
int i;
/* power down all u3 ports */
for (i = 0; i < mtk->num_u3ports; i++)
setbits_le32(mtk->ippc + IPPC_U3_CTRL(i),
CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS);
/* power down all u2 ports */
for (i = 0; i < mtk->num_u2ports; i++)
setbits_le32(mtk->ippc + IPPC_U2_CTRL(i),
CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
/* power down host ip */
setbits_le32(mtk->ippc + IPPC_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);
return 0;
}
static int xhci_mtk_ssusb_init(struct mtk_xhci *mtk)
{
u32 value;
/* reset whole ip */
setbits_le32(mtk->ippc + IPPC_IP_PW_CTRL0, CTRL0_IP_SW_RST);
udelay(1);
clrbits_le32(mtk->ippc + IPPC_IP_PW_CTRL0, CTRL0_IP_SW_RST);
value = readl(mtk->ippc + IPPC_IP_XHCI_CAP);
mtk->num_u3ports = CAP_U3_PORT_NUM(value);
mtk->num_u2ports = CAP_U2_PORT_NUM(value);
dev_info(mtk->dev, "u2p:%d, u3p:%d\n",
mtk->num_u2ports, mtk->num_u3ports);
return xhci_mtk_host_enable(mtk);
}
static int xhci_mtk_ofdata_get(struct mtk_xhci *mtk)
{
struct udevice *dev = mtk->dev;
int ret = 0;
mtk->hcd = devfdt_remap_addr_name(dev, "mac");
if (!mtk->hcd) {
dev_err(dev, "failed to get xHCI base address\n");
return -ENXIO;
}
mtk->ippc = devfdt_remap_addr_name(dev, "ippc");
if (!mtk->ippc) {
dev_err(dev, "failed to get IPPC base address\n");
return -ENXIO;
}
dev_info(dev, "hcd: 0x%p, ippc: 0x%p\n", mtk->hcd, mtk->ippc);
ret = clk_get_bulk(dev, &mtk->clks);
if (ret) {
dev_err(dev, "failed to get clocks %d!\n", ret);
return ret;
}
ret = device_get_supply_regulator(dev, "vusb33-supply",
&mtk->vusb33_supply);
if (ret)
debug("can't get vusb33 regulator %d!\n", ret);
ret = device_get_supply_regulator(dev, "vbus-supply",
&mtk->vbus_supply);
if (ret)
debug("can't get vbus regulator %d!\n", ret);
/* optional properties to disable ports, ignore the error */
dev_read_u32(dev, "mediatek,u3p-dis-msk", &mtk->u3p_dis_msk);
dev_read_u32(dev, "mediatek,u2p-dis-msk", &mtk->u2p_dis_msk);
dev_info(dev, "ports disabled mask: u3p-0x%x, u2p-0x%x\n",
mtk->u3p_dis_msk, mtk->u2p_dis_msk);
return 0;
}
static int xhci_mtk_ldos_enable(struct mtk_xhci *mtk)
{
int ret;
ret = regulator_set_enable(mtk->vusb33_supply, true);
if (ret < 0 && ret != -ENOSYS) {
dev_err(mtk->dev, "failed to enable vusb33 %d!\n", ret);
return ret;
}
ret = regulator_set_enable(mtk->vbus_supply, true);
if (ret < 0 && ret != -ENOSYS) {
dev_err(mtk->dev, "failed to enable vbus %d!\n", ret);
regulator_set_enable(mtk->vusb33_supply, false);
return ret;
}
return 0;
}
static void xhci_mtk_ldos_disable(struct mtk_xhci *mtk)
{
regulator_set_enable(mtk->vbus_supply, false);
regulator_set_enable(mtk->vusb33_supply, false);
}
static int xhci_mtk_phy_setup(struct mtk_xhci *mtk)
{
struct udevice *dev = mtk->dev;
struct phy_bulk *phys = &mtk->phys;
int ret;
ret = generic_phy_get_bulk(dev, phys);
if (ret)
return ret;
ret = generic_phy_init_bulk(phys);
if (ret)
return ret;
ret = generic_phy_power_on_bulk(phys);
if (ret)
generic_phy_exit_bulk(phys);
return ret;
}
static void xhci_mtk_phy_shutdown(struct mtk_xhci *mtk)
{
generic_phy_power_off_bulk(&mtk->phys);
generic_phy_exit_bulk(&mtk->phys);
}
static int xhci_mtk_probe(struct udevice *dev)
{
struct mtk_xhci *mtk = dev_get_priv(dev);
struct xhci_hcor *hcor;
int ret;
mtk->dev = dev;
ret = xhci_mtk_ofdata_get(mtk);
if (ret)
return ret;
ret = xhci_mtk_ldos_enable(mtk);
if (ret)
goto ldos_err;
ret = clk_enable_bulk(&mtk->clks);
if (ret)
goto clks_err;
ret = xhci_mtk_phy_setup(mtk);
if (ret)
goto phys_err;
ret = xhci_mtk_ssusb_init(mtk);
if (ret)
goto ssusb_init_err;
xhci_mtk_set_frame_interval(mtk);
mtk->ctrl.quirks = XHCI_MTK_HOST;
hcor = (struct xhci_hcor *)((uintptr_t)mtk->hcd +
HC_LENGTH(xhci_readl(&mtk->hcd->cr_capbase)));
return xhci_register(dev, mtk->hcd, hcor);
ssusb_init_err:
xhci_mtk_phy_shutdown(mtk);
phys_err:
clk_disable_bulk(&mtk->clks);
clks_err:
xhci_mtk_ldos_disable(mtk);
ldos_err:
return ret;
}
static int xhci_mtk_remove(struct udevice *dev)
{
struct mtk_xhci *mtk = dev_get_priv(dev);
xhci_deregister(dev);
xhci_mtk_host_disable(mtk);
xhci_mtk_ldos_disable(mtk);
clk_disable_bulk(&mtk->clks);
return 0;
}
static const struct udevice_id xhci_mtk_ids[] = {
{ .compatible = "mediatek,mtk-xhci" },
{ .compatible = "mediatek,mt8195-xhci" },
{ }
};
U_BOOT_DRIVER(usb_xhci) = {
.name = "xhci-mtk",
.id = UCLASS_USB,
.of_match = xhci_mtk_ids,
.probe = xhci_mtk_probe,
.remove = xhci_mtk_remove,
.ops = &xhci_usb_ops,
.bind = dm_scan_fdt_dev,
.priv_auto = sizeof(struct mtk_xhci),
.flags = DM_FLAG_ALLOC_PRIV_DMA,
};
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