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-rw-r--r--target/linux/ramips/patches-4.4/0033-xhci-mediatek-support-MTK-xHCI-host-controller.patch1517
1 files changed, 1517 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-4.4/0033-xhci-mediatek-support-MTK-xHCI-host-controller.patch b/target/linux/ramips/patches-4.4/0033-xhci-mediatek-support-MTK-xHCI-host-controller.patch
new file mode 100644
index 0000000000..a00d2d7d3b
--- /dev/null
+++ b/target/linux/ramips/patches-4.4/0033-xhci-mediatek-support-MTK-xHCI-host-controller.patch
@@ -0,0 +1,1517 @@
+From: Chunfeng Yun <chunfeng.yun@mediatek.com>
+Date: Tue, 24 Nov 2015 13:09:55 +0200
+Subject: [PATCH] xhci: mediatek: support MTK xHCI host controller
+
+There some vendor quirks for MTK xhci host controller:
+1. It defines some extra SW scheduling parameters for HW
+ to minimize the scheduling effort for synchronous and
+ interrupt endpoints. The parameters are put into reseved
+ DWs of slot context and endpoint context.
+2. Its IMODI unit for Interrupter Moderation register is
+ 8 times as much as that defined in xHCI spec.
+3. Its TDS in Normal TRB defines a number of packets that
+ remains to be transferred for a TD after processing all
+ Max packets in all previous TRBs.
+
+Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
+Tested-by: Daniel Thompson <daniel.thompson@linaro.org>
+Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
+Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ create mode 100644 drivers/usb/host/xhci-mtk-sch.c
+ create mode 100644 drivers/usb/host/xhci-mtk.c
+ create mode 100644 drivers/usb/host/xhci-mtk.h
+
+--- a/drivers/usb/host/Kconfig
++++ b/drivers/usb/host/Kconfig
+@@ -41,6 +41,15 @@ config USB_XHCI_PLATFORM
+
+ If unsure, say N.
+
++config USB_XHCI_MTK
++ tristate "xHCI support for Mediatek MT65xx"
++ select MFD_SYSCON
++ depends on ARCH_MEDIATEK || COMPILE_TEST
++ ---help---
++ Say 'Y' to enable the support for the xHCI host controller
++ found in Mediatek MT65xx SoCs.
++ If unsure, say N.
++
+ config USB_XHCI_MVEBU
+ tristate "xHCI support for Marvell Armada 375/38x"
+ select USB_XHCI_PLATFORM
+--- a/drivers/usb/host/Makefile
++++ b/drivers/usb/host/Makefile
+@@ -13,6 +13,9 @@ fhci-$(CONFIG_FHCI_DEBUG) += fhci-dbg.o
+ xhci-hcd-y := xhci.o xhci-mem.o
+ xhci-hcd-y += xhci-ring.o xhci-hub.o xhci-dbg.o
+ xhci-hcd-y += xhci-trace.o
++ifneq ($(CONFIG_USB_XHCI_MTK), )
++ xhci-hcd-y += xhci-mtk-sch.o
++endif
+
+ xhci-plat-hcd-y := xhci-plat.o
+ ifneq ($(CONFIG_USB_XHCI_MVEBU), )
+@@ -64,6 +67,7 @@ obj-$(CONFIG_USB_FHCI_HCD) += fhci.o
+ obj-$(CONFIG_USB_XHCI_HCD) += xhci-hcd.o
+ obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
+ obj-$(CONFIG_USB_XHCI_PLATFORM) += xhci-plat-hcd.o
++obj-$(CONFIG_USB_XHCI_MTK) += xhci-mtk.o
+ obj-$(CONFIG_USB_SL811_HCD) += sl811-hcd.o
+ obj-$(CONFIG_USB_SL811_CS) += sl811_cs.o
+ obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
+--- /dev/null
++++ b/drivers/usb/host/xhci-mtk-sch.c
+@@ -0,0 +1,415 @@
++/*
++ * Copyright (c) 2015 MediaTek Inc.
++ * Author:
++ * Zhigang.Wei <zhigang.wei@mediatek.com>
++ * Chunfeng.Yun <chunfeng.yun@mediatek.com>
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ */
++
++#include <linux/kernel.h>
++#include <linux/module.h>
++#include <linux/slab.h>
++
++#include "xhci.h"
++#include "xhci-mtk.h"
++
++#define SS_BW_BOUNDARY 51000
++/* table 5-5. High-speed Isoc Transaction Limits in usb_20 spec */
++#define HS_BW_BOUNDARY 6144
++/* usb2 spec section11.18.1: at most 188 FS bytes per microframe */
++#define FS_PAYLOAD_MAX 188
++
++/* mtk scheduler bitmasks */
++#define EP_BPKTS(p) ((p) & 0x3f)
++#define EP_BCSCOUNT(p) (((p) & 0x7) << 8)
++#define EP_BBM(p) ((p) << 11)
++#define EP_BOFFSET(p) ((p) & 0x3fff)
++#define EP_BREPEAT(p) (((p) & 0x7fff) << 16)
++
++static int is_fs_or_ls(enum usb_device_speed speed)
++{
++ return speed == USB_SPEED_FULL || speed == USB_SPEED_LOW;
++}
++
++/*
++* get the index of bandwidth domains array which @ep belongs to.
++*
++* the bandwidth domain array is saved to @sch_array of struct xhci_hcd_mtk,
++* each HS root port is treated as a single bandwidth domain,
++* but each SS root port is treated as two bandwidth domains, one for IN eps,
++* one for OUT eps.
++* @real_port value is defined as follow according to xHCI spec:
++* 1 for SSport0, ..., N+1 for SSportN, N+2 for HSport0, N+3 for HSport1, etc
++* so the bandwidth domain array is organized as follow for simplification:
++* SSport0-OUT, SSport0-IN, ..., SSportX-OUT, SSportX-IN, HSport0, ..., HSportY
++*/
++static int get_bw_index(struct xhci_hcd *xhci, struct usb_device *udev,
++ struct usb_host_endpoint *ep)
++{
++ struct xhci_virt_device *virt_dev;
++ int bw_index;
++
++ virt_dev = xhci->devs[udev->slot_id];
++
++ if (udev->speed == USB_SPEED_SUPER) {
++ if (usb_endpoint_dir_out(&ep->desc))
++ bw_index = (virt_dev->real_port - 1) * 2;
++ else
++ bw_index = (virt_dev->real_port - 1) * 2 + 1;
++ } else {
++ /* add one more for each SS port */
++ bw_index = virt_dev->real_port + xhci->num_usb3_ports - 1;
++ }
++
++ return bw_index;
++}
++
++static void setup_sch_info(struct usb_device *udev,
++ struct xhci_ep_ctx *ep_ctx, struct mu3h_sch_ep_info *sch_ep)
++{
++ u32 ep_type;
++ u32 ep_interval;
++ u32 max_packet_size;
++ u32 max_burst;
++ u32 mult;
++ u32 esit_pkts;
++
++ ep_type = CTX_TO_EP_TYPE(le32_to_cpu(ep_ctx->ep_info2));
++ ep_interval = CTX_TO_EP_INTERVAL(le32_to_cpu(ep_ctx->ep_info));
++ max_packet_size = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2));
++ max_burst = CTX_TO_MAX_BURST(le32_to_cpu(ep_ctx->ep_info2));
++ mult = CTX_TO_EP_MULT(le32_to_cpu(ep_ctx->ep_info));
++
++ sch_ep->esit = 1 << ep_interval;
++ sch_ep->offset = 0;
++ sch_ep->burst_mode = 0;
++
++ if (udev->speed == USB_SPEED_HIGH) {
++ sch_ep->cs_count = 0;
++
++ /*
++ * usb_20 spec section5.9
++ * a single microframe is enough for HS synchromous endpoints
++ * in a interval
++ */
++ sch_ep->num_budget_microframes = 1;
++ sch_ep->repeat = 0;
++
++ /*
++ * xHCI spec section6.2.3.4
++ * @max_burst is the number of additional transactions
++ * opportunities per microframe
++ */
++ sch_ep->pkts = max_burst + 1;
++ sch_ep->bw_cost_per_microframe = max_packet_size * sch_ep->pkts;
++ } else if (udev->speed == USB_SPEED_SUPER) {
++ /* usb3_r1 spec section4.4.7 & 4.4.8 */
++ sch_ep->cs_count = 0;
++ esit_pkts = (mult + 1) * (max_burst + 1);
++ if (ep_type == INT_IN_EP || ep_type == INT_OUT_EP) {
++ sch_ep->pkts = esit_pkts;
++ sch_ep->num_budget_microframes = 1;
++ sch_ep->repeat = 0;
++ }
++
++ if (ep_type == ISOC_IN_EP || ep_type == ISOC_OUT_EP) {
++ if (esit_pkts <= sch_ep->esit)
++ sch_ep->pkts = 1;
++ else
++ sch_ep->pkts = roundup_pow_of_two(esit_pkts)
++ / sch_ep->esit;
++
++ sch_ep->num_budget_microframes =
++ DIV_ROUND_UP(esit_pkts, sch_ep->pkts);
++
++ if (sch_ep->num_budget_microframes > 1)
++ sch_ep->repeat = 1;
++ else
++ sch_ep->repeat = 0;
++ }
++ sch_ep->bw_cost_per_microframe = max_packet_size * sch_ep->pkts;
++ } else if (is_fs_or_ls(udev->speed)) {
++
++ /*
++ * usb_20 spec section11.18.4
++ * assume worst cases
++ */
++ sch_ep->repeat = 0;
++ sch_ep->pkts = 1; /* at most one packet for each microframe */
++ if (ep_type == INT_IN_EP || ep_type == INT_OUT_EP) {
++ sch_ep->cs_count = 3; /* at most need 3 CS*/
++ /* one for SS and one for budgeted transaction */
++ sch_ep->num_budget_microframes = sch_ep->cs_count + 2;
++ sch_ep->bw_cost_per_microframe = max_packet_size;
++ }
++ if (ep_type == ISOC_OUT_EP) {
++
++ /*
++ * the best case FS budget assumes that 188 FS bytes
++ * occur in each microframe
++ */
++ sch_ep->num_budget_microframes = DIV_ROUND_UP(
++ max_packet_size, FS_PAYLOAD_MAX);
++ sch_ep->bw_cost_per_microframe = FS_PAYLOAD_MAX;
++ sch_ep->cs_count = sch_ep->num_budget_microframes;
++ }
++ if (ep_type == ISOC_IN_EP) {
++ /* at most need additional two CS. */
++ sch_ep->cs_count = DIV_ROUND_UP(
++ max_packet_size, FS_PAYLOAD_MAX) + 2;
++ sch_ep->num_budget_microframes = sch_ep->cs_count + 2;
++ sch_ep->bw_cost_per_microframe = FS_PAYLOAD_MAX;
++ }
++ }
++}
++
++/* Get maximum bandwidth when we schedule at offset slot. */
++static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw,
++ struct mu3h_sch_ep_info *sch_ep, u32 offset)
++{
++ u32 num_esit;
++ u32 max_bw = 0;
++ int i;
++ int j;
++
++ num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
++ for (i = 0; i < num_esit; i++) {
++ u32 base = offset + i * sch_ep->esit;
++
++ for (j = 0; j < sch_ep->num_budget_microframes; j++) {
++ if (sch_bw->bus_bw[base + j] > max_bw)
++ max_bw = sch_bw->bus_bw[base + j];
++ }
++ }
++ return max_bw;
++}
++
++static void update_bus_bw(struct mu3h_sch_bw_info *sch_bw,
++ struct mu3h_sch_ep_info *sch_ep, int bw_cost)
++{
++ u32 num_esit;
++ u32 base;
++ int i;
++ int j;
++
++ num_esit = XHCI_MTK_MAX_ESIT / sch_ep->esit;
++ for (i = 0; i < num_esit; i++) {
++ base = sch_ep->offset + i * sch_ep->esit;
++ for (j = 0; j < sch_ep->num_budget_microframes; j++)
++ sch_bw->bus_bw[base + j] += bw_cost;
++ }
++}
++
++static int check_sch_bw(struct usb_device *udev,
++ struct mu3h_sch_bw_info *sch_bw, struct mu3h_sch_ep_info *sch_ep)
++{
++ u32 offset;
++ u32 esit;
++ u32 num_budget_microframes;
++ u32 min_bw;
++ u32 min_index;
++ u32 worst_bw;
++ u32 bw_boundary;
++
++ if (sch_ep->esit > XHCI_MTK_MAX_ESIT)
++ sch_ep->esit = XHCI_MTK_MAX_ESIT;
++
++ esit = sch_ep->esit;
++ num_budget_microframes = sch_ep->num_budget_microframes;
++
++ /*
++ * Search through all possible schedule microframes.
++ * and find a microframe where its worst bandwidth is minimum.
++ */
++ min_bw = ~0;
++ min_index = 0;
++ for (offset = 0; offset < esit; offset++) {
++ if ((offset + num_budget_microframes) > sch_ep->esit)
++ break;
++
++ /*
++ * usb_20 spec section11.18:
++ * must never schedule Start-Split in Y6
++ */
++ if (is_fs_or_ls(udev->speed) && (offset % 8 == 6))
++ continue;
++
++ worst_bw = get_max_bw(sch_bw, sch_ep, offset);
++ if (min_bw > worst_bw) {
++ min_bw = worst_bw;
++ min_index = offset;
++ }
++ if (min_bw == 0)
++ break;
++ }
++ sch_ep->offset = min_index;
++
++ bw_boundary = (udev->speed == USB_SPEED_SUPER)
++ ? SS_BW_BOUNDARY : HS_BW_BOUNDARY;
++
++ /* check bandwidth */
++ if (min_bw + sch_ep->bw_cost_per_microframe > bw_boundary)
++ return -ERANGE;
++
++ /* update bus bandwidth info */
++ update_bus_bw(sch_bw, sch_ep, sch_ep->bw_cost_per_microframe);
++
++ return 0;
++}
++
++static bool need_bw_sch(struct usb_host_endpoint *ep,
++ enum usb_device_speed speed, int has_tt)
++{
++ /* only for periodic endpoints */
++ if (usb_endpoint_xfer_control(&ep->desc)
++ || usb_endpoint_xfer_bulk(&ep->desc))
++ return false;
++
++ /*
++ * for LS & FS periodic endpoints which its device don't attach
++ * to TT are also ignored, root-hub will schedule them directly
++ */
++ if (is_fs_or_ls(speed) && !has_tt)
++ return false;
++
++ return true;
++}
++
++int xhci_mtk_sch_init(struct xhci_hcd_mtk *mtk)
++{
++ struct mu3h_sch_bw_info *sch_array;
++ int num_usb_bus;
++ int i;
++
++ /* ss IN and OUT are separated */
++ num_usb_bus = mtk->num_u3_ports * 2 + mtk->num_u2_ports;
++
++ sch_array = kcalloc(num_usb_bus, sizeof(*sch_array), GFP_KERNEL);
++ if (sch_array == NULL)
++ return -ENOMEM;
++
++ for (i = 0; i < num_usb_bus; i++)
++ INIT_LIST_HEAD(&sch_array[i].bw_ep_list);
++
++ mtk->sch_array = sch_array;
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(xhci_mtk_sch_init);
++
++void xhci_mtk_sch_exit(struct xhci_hcd_mtk *mtk)
++{
++ kfree(mtk->sch_array);
++}
++EXPORT_SYMBOL_GPL(xhci_mtk_sch_exit);
++
++int xhci_mtk_add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
++ struct usb_host_endpoint *ep)
++{
++ struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
++ struct xhci_hcd *xhci;
++ struct xhci_ep_ctx *ep_ctx;
++ struct xhci_slot_ctx *slot_ctx;
++ struct xhci_virt_device *virt_dev;
++ struct mu3h_sch_bw_info *sch_bw;
++ struct mu3h_sch_ep_info *sch_ep;
++ struct mu3h_sch_bw_info *sch_array;
++ unsigned int ep_index;
++ int bw_index;
++ int ret = 0;
++
++ xhci = hcd_to_xhci(hcd);
++ virt_dev = xhci->devs[udev->slot_id];
++ ep_index = xhci_get_endpoint_index(&ep->desc);
++ slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
++ ep_ctx = xhci_get_ep_ctx(xhci, virt_dev->in_ctx, ep_index);
++ sch_array = mtk->sch_array;
++
++ xhci_dbg(xhci, "%s() type:%d, speed:%d, mpkt:%d, dir:%d, ep:%p\n",
++ __func__, usb_endpoint_type(&ep->desc), udev->speed,
++ GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc)),
++ usb_endpoint_dir_in(&ep->desc), ep);
++
++ if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT))
++ return 0;
++
++ bw_index = get_bw_index(xhci, udev, ep);
++ sch_bw = &sch_array[bw_index];
++
++ sch_ep = kzalloc(sizeof(struct mu3h_sch_ep_info), GFP_NOIO);
++ if (!sch_ep)
++ return -ENOMEM;
++
++ setup_sch_info(udev, ep_ctx, sch_ep);
++
++ ret = check_sch_bw(udev, sch_bw, sch_ep);
++ if (ret) {
++ xhci_err(xhci, "Not enough bandwidth!\n");
++ kfree(sch_ep);
++ return -ENOSPC;
++ }
++
++ list_add_tail(&sch_ep->endpoint, &sch_bw->bw_ep_list);
++ sch_ep->ep = ep;
++
++ ep_ctx->reserved[0] |= cpu_to_le32(EP_BPKTS(sch_ep->pkts)
++ | EP_BCSCOUNT(sch_ep->cs_count) | EP_BBM(sch_ep->burst_mode));
++ ep_ctx->reserved[1] |= cpu_to_le32(EP_BOFFSET(sch_ep->offset)
++ | EP_BREPEAT(sch_ep->repeat));
++
++ xhci_dbg(xhci, " PKTS:%x, CSCOUNT:%x, BM:%x, OFFSET:%x, REPEAT:%x\n",
++ sch_ep->pkts, sch_ep->cs_count, sch_ep->burst_mode,
++ sch_ep->offset, sch_ep->repeat);
++
++ return 0;
++}
++EXPORT_SYMBOL_GPL(xhci_mtk_add_ep_quirk);
++
++void xhci_mtk_drop_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
++ struct usb_host_endpoint *ep)
++{
++ struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
++ struct xhci_hcd *xhci;
++ struct xhci_slot_ctx *slot_ctx;
++ struct xhci_virt_device *virt_dev;
++ struct mu3h_sch_bw_info *sch_array;
++ struct mu3h_sch_bw_info *sch_bw;
++ struct mu3h_sch_ep_info *sch_ep;
++ int bw_index;
++
++ xhci = hcd_to_xhci(hcd);
++ virt_dev = xhci->devs[udev->slot_id];
++ slot_ctx = xhci_get_slot_ctx(xhci, virt_dev->in_ctx);
++ sch_array = mtk->sch_array;
++
++ xhci_dbg(xhci, "%s() type:%d, speed:%d, mpks:%d, dir:%d, ep:%p\n",
++ __func__, usb_endpoint_type(&ep->desc), udev->speed,
++ GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc)),
++ usb_endpoint_dir_in(&ep->desc), ep);
++
++ if (!need_bw_sch(ep, udev->speed, slot_ctx->tt_info & TT_SLOT))
++ return;
++
++ bw_index = get_bw_index(xhci, udev, ep);
++ sch_bw = &sch_array[bw_index];
++
++ list_for_each_entry(sch_ep, &sch_bw->bw_ep_list, endpoint) {
++ if (sch_ep->ep == ep) {
++ update_bus_bw(sch_bw, sch_ep,
++ -sch_ep->bw_cost_per_microframe);
++ list_del(&sch_ep->endpoint);
++ kfree(sch_ep);
++ break;
++ }
++ }
++}
++EXPORT_SYMBOL_GPL(xhci_mtk_drop_ep_quirk);
+--- /dev/null
++++ b/drivers/usb/host/xhci-mtk.c
+@@ -0,0 +1,763 @@
++/*
++ * MediaTek xHCI Host Controller Driver
++ *
++ * Copyright (c) 2015 MediaTek Inc.
++ * Author:
++ * Chunfeng Yun <chunfeng.yun@mediatek.com>
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ */
++
++#include <linux/clk.h>
++#include <linux/dma-mapping.h>
++#include <linux/iopoll.h>
++#include <linux/kernel.h>
++#include <linux/mfd/syscon.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/phy/phy.h>
++#include <linux/platform_device.h>
++#include <linux/pm_runtime.h>
++#include <linux/regmap.h>
++#include <linux/regulator/consumer.h>
++
++#include "xhci.h"
++#include "xhci-mtk.h"
++
++/* ip_pw_ctrl0 register */
++#define CTRL0_IP_SW_RST BIT(0)
++
++/* ip_pw_ctrl1 register */
++#define CTRL1_IP_HOST_PDN BIT(0)
++
++/* ip_pw_ctrl2 register */
++#define CTRL2_IP_DEV_PDN BIT(0)
++
++/* ip_pw_sts1 register */
++#define STS1_IP_SLEEP_STS BIT(30)
++#define STS1_XHCI_RST BIT(11)
++#define STS1_SYS125_RST BIT(10)
++#define STS1_REF_RST BIT(8)
++#define STS1_SYSPLL_STABLE BIT(0)
++
++/* ip_xhci_cap register */
++#define CAP_U3_PORT_NUM(p) ((p) & 0xff)
++#define CAP_U2_PORT_NUM(p) (((p) >> 8) & 0xff)
++
++/* u3_ctrl_p register */
++#define CTRL_U3_PORT_HOST_SEL BIT(2)
++#define CTRL_U3_PORT_PDN BIT(1)
++#define CTRL_U3_PORT_DIS BIT(0)
++
++/* u2_ctrl_p register */
++#define CTRL_U2_PORT_HOST_SEL BIT(2)
++#define CTRL_U2_PORT_PDN BIT(1)
++#define CTRL_U2_PORT_DIS BIT(0)
++
++/* u2_phy_pll register */
++#define CTRL_U2_FORCE_PLL_STB BIT(28)
++
++#define PERI_WK_CTRL0 0x400
++#define UWK_CTR0_0P_LS_PE BIT(8) /* posedge */
++#define UWK_CTR0_0P_LS_NE BIT(7) /* negedge for 0p linestate*/
++#define UWK_CTL1_1P_LS_C(x) (((x) & 0xf) << 1)
++#define UWK_CTL1_1P_LS_E BIT(0)
++
++#define PERI_WK_CTRL1 0x404
++#define UWK_CTL1_IS_C(x) (((x) & 0xf) << 26)
++#define UWK_CTL1_IS_E BIT(25)
++#define UWK_CTL1_0P_LS_C(x) (((x) & 0xf) << 21)
++#define UWK_CTL1_0P_LS_E BIT(20)
++#define UWK_CTL1_IDDIG_C(x) (((x) & 0xf) << 11) /* cycle debounce */
++#define UWK_CTL1_IDDIG_E BIT(10) /* enable debounce */
++#define UWK_CTL1_IDDIG_P BIT(9) /* polarity */
++#define UWK_CTL1_0P_LS_P BIT(7)
++#define UWK_CTL1_IS_P BIT(6) /* polarity for ip sleep */
++
++enum ssusb_wakeup_src {
++ SSUSB_WK_IP_SLEEP = 1,
++ SSUSB_WK_LINE_STATE = 2,
++};
++
++static int xhci_mtk_host_enable(struct xhci_hcd_mtk *mtk)
++{
++ struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
++ u32 value, check_val;
++ int ret;
++ int i;
++
++ /* power on host ip */
++ value = readl(&ippc->ip_pw_ctr1);
++ value &= ~CTRL1_IP_HOST_PDN;
++ writel(value, &ippc->ip_pw_ctr1);
++
++ /* power on and enable all u3 ports */
++ for (i = 0; i < mtk->num_u3_ports; i++) {
++ value = readl(&ippc->u3_ctrl_p[i]);
++ value &= ~(CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS);
++ value |= CTRL_U3_PORT_HOST_SEL;
++ writel(value, &ippc->u3_ctrl_p[i]);
++ }
++
++ /* power on and enable all u2 ports */
++ for (i = 0; i < mtk->num_u2_ports; i++) {
++ value = readl(&ippc->u2_ctrl_p[i]);
++ value &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
++ value |= CTRL_U2_PORT_HOST_SEL;
++ writel(value, &ippc->u2_ctrl_p[i]);
++ }
++
++ /*
++ * 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;
++
++ ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
++ (check_val == (value & check_val)), 100, 20000);
++ if (ret) {
++ dev_err(mtk->dev, "clocks are not stable (0x%x)\n", value);
++ return ret;
++ }
++
++ return 0;
++}
++
++static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk)
++{
++ struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
++ u32 value;
++ int ret;
++ int i;
++
++ /* power down all u3 ports */
++ for (i = 0; i < mtk->num_u3_ports; i++) {
++ value = readl(&ippc->u3_ctrl_p[i]);
++ value |= CTRL_U3_PORT_PDN;
++ writel(value, &ippc->u3_ctrl_p[i]);
++ }
++
++ /* power down all u2 ports */
++ for (i = 0; i < mtk->num_u2_ports; i++) {
++ value = readl(&ippc->u2_ctrl_p[i]);
++ value |= CTRL_U2_PORT_PDN;
++ writel(value, &ippc->u2_ctrl_p[i]);
++ }
++
++ /* power down host ip */
++ value = readl(&ippc->ip_pw_ctr1);
++ value |= CTRL1_IP_HOST_PDN;
++ writel(value, &ippc->ip_pw_ctr1);
++
++ /* wait for host ip to sleep */
++ ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
++ (value & STS1_IP_SLEEP_STS), 100, 100000);
++ if (ret) {
++ dev_err(mtk->dev, "ip sleep failed!!!\n");
++ return ret;
++ }
++ return 0;
++}
++
++static int xhci_mtk_ssusb_config(struct xhci_hcd_mtk *mtk)
++{
++ struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
++ u32 value;
++
++ /* reset whole ip */
++ value = readl(&ippc->ip_pw_ctr0);
++ value |= CTRL0_IP_SW_RST;
++ writel(value, &ippc->ip_pw_ctr0);
++ udelay(1);
++ value = readl(&ippc->ip_pw_ctr0);
++ value &= ~CTRL0_IP_SW_RST;
++ writel(value, &ippc->ip_pw_ctr0);
++
++ /*
++ * device ip is default power-on in fact
++ * power down device ip, otherwise ip-sleep will fail
++ */
++ value = readl(&ippc->ip_pw_ctr2);
++ value |= CTRL2_IP_DEV_PDN;
++ writel(value, &ippc->ip_pw_ctr2);
++
++ value = readl(&ippc->ip_xhci_cap);
++ mtk->num_u3_ports = CAP_U3_PORT_NUM(value);
++ mtk->num_u2_ports = CAP_U2_PORT_NUM(value);
++ dev_dbg(mtk->dev, "%s u2p:%d, u3p:%d\n", __func__,
++ mtk->num_u2_ports, mtk->num_u3_ports);
++
++ return xhci_mtk_host_enable(mtk);
++}
++
++static int xhci_mtk_clks_enable(struct xhci_hcd_mtk *mtk)
++{
++ int ret;
++
++ ret = clk_prepare_enable(mtk->sys_clk);
++ if (ret) {
++ dev_err(mtk->dev, "failed to enable sys_clk\n");
++ goto sys_clk_err;
++ }
++
++ if (mtk->wakeup_src) {
++ ret = clk_prepare_enable(mtk->wk_deb_p0);
++ if (ret) {
++ dev_err(mtk->dev, "failed to enable wk_deb_p0\n");
++ goto usb_p0_err;
++ }
++
++ ret = clk_prepare_enable(mtk->wk_deb_p1);
++ if (ret) {
++ dev_err(mtk->dev, "failed to enable wk_deb_p1\n");
++ goto usb_p1_err;
++ }
++ }
++ return 0;
++
++usb_p1_err:
++ clk_disable_unprepare(mtk->wk_deb_p0);
++usb_p0_err:
++ clk_disable_unprepare(mtk->sys_clk);
++sys_clk_err:
++ return -EINVAL;
++}
++
++static void xhci_mtk_clks_disable(struct xhci_hcd_mtk *mtk)
++{
++ if (mtk->wakeup_src) {
++ clk_disable_unprepare(mtk->wk_deb_p1);
++ clk_disable_unprepare(mtk->wk_deb_p0);
++ }
++ clk_disable_unprepare(mtk->sys_clk);
++}
++
++/* only clocks can be turn off for ip-sleep wakeup mode */
++static void usb_wakeup_ip_sleep_en(struct xhci_hcd_mtk *mtk)
++{
++ u32 tmp;
++ struct regmap *pericfg = mtk->pericfg;
++
++ regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
++ tmp &= ~UWK_CTL1_IS_P;
++ tmp &= ~(UWK_CTL1_IS_C(0xf));
++ tmp |= UWK_CTL1_IS_C(0x8);
++ regmap_write(pericfg, PERI_WK_CTRL1, tmp);
++ regmap_write(pericfg, PERI_WK_CTRL1, tmp | UWK_CTL1_IS_E);
++
++ regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
++ dev_dbg(mtk->dev, "%s(): WK_CTRL1[P6,E25,C26:29]=%#x\n",
++ __func__, tmp);
++}
++
++static void usb_wakeup_ip_sleep_dis(struct xhci_hcd_mtk *mtk)
++{
++ u32 tmp;
++
++ regmap_read(mtk->pericfg, PERI_WK_CTRL1, &tmp);
++ tmp &= ~UWK_CTL1_IS_E;
++ regmap_write(mtk->pericfg, PERI_WK_CTRL1, tmp);
++}
++
++/*
++* for line-state wakeup mode, phy's power should not power-down
++* and only support cable plug in/out
++*/
++static void usb_wakeup_line_state_en(struct xhci_hcd_mtk *mtk)
++{
++ u32 tmp;
++ struct regmap *pericfg = mtk->pericfg;
++
++ /* line-state of u2-port0 */
++ regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
++ tmp &= ~UWK_CTL1_0P_LS_P;
++ tmp &= ~(UWK_CTL1_0P_LS_C(0xf));
++ tmp |= UWK_CTL1_0P_LS_C(0x8);
++ regmap_write(pericfg, PERI_WK_CTRL1, tmp);
++ regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
++ regmap_write(pericfg, PERI_WK_CTRL1, tmp | UWK_CTL1_0P_LS_E);
++
++ /* line-state of u2-port1 */
++ regmap_read(pericfg, PERI_WK_CTRL0, &tmp);
++ tmp &= ~(UWK_CTL1_1P_LS_C(0xf));
++ tmp |= UWK_CTL1_1P_LS_C(0x8);
++ regmap_write(pericfg, PERI_WK_CTRL0, tmp);
++ regmap_write(pericfg, PERI_WK_CTRL0, tmp | UWK_CTL1_1P_LS_E);
++}
++
++static void usb_wakeup_line_state_dis(struct xhci_hcd_mtk *mtk)
++{
++ u32 tmp;
++ struct regmap *pericfg = mtk->pericfg;
++
++ /* line-state of u2-port0 */
++ regmap_read(pericfg, PERI_WK_CTRL1, &tmp);
++ tmp &= ~UWK_CTL1_0P_LS_E;
++ regmap_write(pericfg, PERI_WK_CTRL1, tmp);
++
++ /* line-state of u2-port1 */
++ regmap_read(pericfg, PERI_WK_CTRL0, &tmp);
++ tmp &= ~UWK_CTL1_1P_LS_E;
++ regmap_write(pericfg, PERI_WK_CTRL0, tmp);
++}
++
++static void usb_wakeup_enable(struct xhci_hcd_mtk *mtk)
++{
++ if (mtk->wakeup_src == SSUSB_WK_IP_SLEEP)
++ usb_wakeup_ip_sleep_en(mtk);
++ else if (mtk->wakeup_src == SSUSB_WK_LINE_STATE)
++ usb_wakeup_line_state_en(mtk);
++}
++
++static void usb_wakeup_disable(struct xhci_hcd_mtk *mtk)
++{
++ if (mtk->wakeup_src == SSUSB_WK_IP_SLEEP)
++ usb_wakeup_ip_sleep_dis(mtk);
++ else if (mtk->wakeup_src == SSUSB_WK_LINE_STATE)
++ usb_wakeup_line_state_dis(mtk);
++}
++
++static int usb_wakeup_of_property_parse(struct xhci_hcd_mtk *mtk,
++ struct device_node *dn)
++{
++ struct device *dev = mtk->dev;
++
++ /*
++ * wakeup function is optional, so it is not an error if this property
++ * does not exist, and in such case, no need to get relative
++ * properties anymore.
++ */
++ of_property_read_u32(dn, "mediatek,wakeup-src", &mtk->wakeup_src);
++ if (!mtk->wakeup_src)
++ return 0;
++
++ mtk->wk_deb_p0 = devm_clk_get(dev, "wakeup_deb_p0");
++ if (IS_ERR(mtk->wk_deb_p0)) {
++ dev_err(dev, "fail to get wakeup_deb_p0\n");
++ return PTR_ERR(mtk->wk_deb_p0);
++ }
++
++ mtk->wk_deb_p1 = devm_clk_get(dev, "wakeup_deb_p1");
++ if (IS_ERR(mtk->wk_deb_p1)) {
++ dev_err(dev, "fail to get wakeup_deb_p1\n");
++ return PTR_ERR(mtk->wk_deb_p1);
++ }
++
++ mtk->pericfg = syscon_regmap_lookup_by_phandle(dn,
++ "mediatek,syscon-wakeup");
++ if (IS_ERR(mtk->pericfg)) {
++ dev_err(dev, "fail to get pericfg regs\n");
++ return PTR_ERR(mtk->pericfg);
++ }
++
++ return 0;
++}
++
++static int xhci_mtk_setup(struct usb_hcd *hcd);
++static const struct xhci_driver_overrides xhci_mtk_overrides __initconst = {
++ .extra_priv_size = sizeof(struct xhci_hcd),
++ .reset = xhci_mtk_setup,
++};
++
++static struct hc_driver __read_mostly xhci_mtk_hc_driver;
++
++static int xhci_mtk_phy_init(struct xhci_hcd_mtk *mtk)
++{
++ int i;
++ int ret;
++
++ for (i = 0; i < mtk->num_phys; i++) {
++ ret = phy_init(mtk->phys[i]);
++ if (ret)
++ goto exit_phy;
++ }
++ return 0;
++
++exit_phy:
++ for (; i > 0; i--)
++ phy_exit(mtk->phys[i - 1]);
++
++ return ret;
++}
++
++static int xhci_mtk_phy_exit(struct xhci_hcd_mtk *mtk)
++{
++ int i;
++
++ for (i = 0; i < mtk->num_phys; i++)
++ phy_exit(mtk->phys[i]);
++
++ return 0;
++}
++
++static int xhci_mtk_phy_power_on(struct xhci_hcd_mtk *mtk)
++{
++ int i;
++ int ret;
++
++ for (i = 0; i < mtk->num_phys; i++) {
++ ret = phy_power_on(mtk->phys[i]);
++ if (ret)
++ goto power_off_phy;
++ }
++ return 0;
++
++power_off_phy:
++ for (; i > 0; i--)
++ phy_power_off(mtk->phys[i - 1]);
++
++ return ret;
++}
++
++static void xhci_mtk_phy_power_off(struct xhci_hcd_mtk *mtk)
++{
++ unsigned int i;
++
++ for (i = 0; i < mtk->num_phys; i++)
++ phy_power_off(mtk->phys[i]);
++}
++
++static int xhci_mtk_ldos_enable(struct xhci_hcd_mtk *mtk)
++{
++ int ret;
++
++ ret = regulator_enable(mtk->vbus);
++ if (ret) {
++ dev_err(mtk->dev, "failed to enable vbus\n");
++ return ret;
++ }
++
++ ret = regulator_enable(mtk->vusb33);
++ if (ret) {
++ dev_err(mtk->dev, "failed to enable vusb33\n");
++ regulator_disable(mtk->vbus);
++ return ret;
++ }
++ return 0;
++}
++
++static void xhci_mtk_ldos_disable(struct xhci_hcd_mtk *mtk)
++{
++ regulator_disable(mtk->vbus);
++ regulator_disable(mtk->vusb33);
++}
++
++static void xhci_mtk_quirks(struct device *dev, struct xhci_hcd *xhci)
++{
++ struct usb_hcd *hcd = xhci_to_hcd(xhci);
++ struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
++
++ /*
++ * As of now platform drivers don't provide MSI support so we ensure
++ * here that the generic code does not try to make a pci_dev from our
++ * dev struct in order to setup MSI
++ */
++ xhci->quirks |= XHCI_PLAT;
++ xhci->quirks |= XHCI_MTK_HOST;
++ /*
++ * MTK host controller gives a spurious successful event after a
++ * short transfer. Ignore it.
++ */
++ xhci->quirks |= XHCI_SPURIOUS_SUCCESS;
++ if (mtk->lpm_support)
++ xhci->quirks |= XHCI_LPM_SUPPORT;
++}
++
++/* called during probe() after chip reset completes */
++static int xhci_mtk_setup(struct usb_hcd *hcd)
++{
++ struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
++ int ret;
++
++ if (usb_hcd_is_primary_hcd(hcd)) {
++ ret = xhci_mtk_ssusb_config(mtk);
++ if (ret)
++ return ret;
++ ret = xhci_mtk_sch_init(mtk);
++ if (ret)
++ return ret;
++ }
++
++ return xhci_gen_setup(hcd, xhci_mtk_quirks);
++}
++
++static int xhci_mtk_probe(struct platform_device *pdev)
++{
++ struct device *dev = &pdev->dev;
++ struct device_node *node = dev->of_node;
++ struct xhci_hcd_mtk *mtk;
++ const struct hc_driver *driver;
++ struct xhci_hcd *xhci;
++ struct resource *res;
++ struct usb_hcd *hcd;
++ struct phy *phy;
++ int phy_num;
++ int ret = -ENODEV;
++ int irq;
++
++ if (usb_disabled())
++ return -ENODEV;
++
++ driver = &xhci_mtk_hc_driver;
++ mtk = devm_kzalloc(dev, sizeof(*mtk), GFP_KERNEL);
++ if (!mtk)
++ return -ENOMEM;
++
++ mtk->dev = dev;
++ mtk->vbus = devm_regulator_get(dev, "vbus");
++ if (IS_ERR(mtk->vbus)) {
++ dev_err(dev, "fail to get vbus\n");
++ return PTR_ERR(mtk->vbus);
++ }
++
++ mtk->vusb33 = devm_regulator_get(dev, "vusb33");
++ if (IS_ERR(mtk->vusb33)) {
++ dev_err(dev, "fail to get vusb33\n");
++ return PTR_ERR(mtk->vusb33);
++ }
++
++ mtk->sys_clk = devm_clk_get(dev, "sys_ck");
++ if (IS_ERR(mtk->sys_clk)) {
++ dev_err(dev, "fail to get sys_ck\n");
++ return PTR_ERR(mtk->sys_clk);
++ }
++
++ mtk->lpm_support = of_property_read_bool(node, "usb3-lpm-capable");
++
++ ret = usb_wakeup_of_property_parse(mtk, node);
++ if (ret)
++ return ret;
++
++ mtk->num_phys = of_count_phandle_with_args(node,
++ "phys", "#phy-cells");
++ if (mtk->num_phys > 0) {
++ mtk->phys = devm_kcalloc(dev, mtk->num_phys,
++ sizeof(*mtk->phys), GFP_KERNEL);
++ if (!mtk->phys)
++ return -ENOMEM;
++ } else {
++ mtk->num_phys = 0;
++ }
++ pm_runtime_enable(dev);
++ pm_runtime_get_sync(dev);
++ device_enable_async_suspend(dev);
++
++ ret = xhci_mtk_ldos_enable(mtk);
++ if (ret)
++ goto disable_pm;
++
++ ret = xhci_mtk_clks_enable(mtk);
++ if (ret)
++ goto disable_ldos;
++
++ irq = platform_get_irq(pdev, 0);
++ if (irq < 0)
++ goto disable_clk;
++
++ /* Initialize dma_mask and coherent_dma_mask to 32-bits */
++ ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
++ if (ret)
++ goto disable_clk;
++
++ if (!dev->dma_mask)
++ dev->dma_mask = &dev->coherent_dma_mask;
++ else
++ dma_set_mask(dev, DMA_BIT_MASK(32));
++
++ hcd = usb_create_hcd(driver, dev, dev_name(dev));
++ if (!hcd) {
++ ret = -ENOMEM;
++ goto disable_clk;
++ }
++
++ /*
++ * USB 2.0 roothub is stored in the platform_device.
++ * Swap it with mtk HCD.
++ */
++ mtk->hcd = platform_get_drvdata(pdev);
++ platform_set_drvdata(pdev, mtk);
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ hcd->regs = devm_ioremap_resource(dev, res);
++ if (IS_ERR(hcd->regs)) {
++ ret = PTR_ERR(hcd->regs);
++ goto put_usb2_hcd;
++ }
++ hcd->rsrc_start = res->start;
++ hcd->rsrc_len = resource_size(res);
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
++ mtk->ippc_regs = devm_ioremap_resource(dev, res);
++ if (IS_ERR(mtk->ippc_regs)) {
++ ret = PTR_ERR(mtk->ippc_regs);
++ goto put_usb2_hcd;
++ }
++
++ for (phy_num = 0; phy_num < mtk->num_phys; phy_num++) {
++ phy = devm_of_phy_get_by_index(dev, node, phy_num);
++ if (IS_ERR(phy)) {
++ ret = PTR_ERR(phy);
++ goto put_usb2_hcd;
++ }
++ mtk->phys[phy_num] = phy;
++ }
++
++ ret = xhci_mtk_phy_init(mtk);
++ if (ret)
++ goto put_usb2_hcd;
++
++ ret = xhci_mtk_phy_power_on(mtk);
++ if (ret)
++ goto exit_phys;
++
++ device_init_wakeup(dev, true);
++
++ xhci = hcd_to_xhci(hcd);
++ xhci->main_hcd = hcd;
++ xhci->shared_hcd = usb_create_shared_hcd(driver, dev,
++ dev_name(dev), hcd);
++ if (!xhci->shared_hcd) {
++ ret = -ENOMEM;
++ goto power_off_phys;
++ }
++
++ if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
++ xhci->shared_hcd->can_do_streams = 1;
++
++ ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
++ if (ret)
++ goto put_usb3_hcd;
++
++ ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED);
++ if (ret)
++ goto dealloc_usb2_hcd;
++
++ return 0;
++
++dealloc_usb2_hcd:
++ usb_remove_hcd(hcd);
++
++put_usb3_hcd:
++ xhci_mtk_sch_exit(mtk);
++ usb_put_hcd(xhci->shared_hcd);
++
++power_off_phys:
++ xhci_mtk_phy_power_off(mtk);
++ device_init_wakeup(dev, false);
++
++exit_phys:
++ xhci_mtk_phy_exit(mtk);
++
++put_usb2_hcd:
++ usb_put_hcd(hcd);
++
++disable_clk:
++ xhci_mtk_clks_disable(mtk);
++
++disable_ldos:
++ xhci_mtk_ldos_disable(mtk);
++
++disable_pm:
++ pm_runtime_put_sync(dev);
++ pm_runtime_disable(dev);
++ return ret;
++}
++
++static int xhci_mtk_remove(struct platform_device *dev)
++{
++ struct xhci_hcd_mtk *mtk = platform_get_drvdata(dev);
++ struct usb_hcd *hcd = mtk->hcd;
++ struct xhci_hcd *xhci = hcd_to_xhci(hcd);
++
++ usb_remove_hcd(xhci->shared_hcd);
++ xhci_mtk_phy_power_off(mtk);
++ xhci_mtk_phy_exit(mtk);
++ device_init_wakeup(&dev->dev, false);
++
++ usb_remove_hcd(hcd);
++ usb_put_hcd(xhci->shared_hcd);
++ usb_put_hcd(hcd);
++ xhci_mtk_sch_exit(mtk);
++ xhci_mtk_clks_disable(mtk);
++ xhci_mtk_ldos_disable(mtk);
++ pm_runtime_put_sync(&dev->dev);
++ pm_runtime_disable(&dev->dev);
++
++ return 0;
++}
++
++#ifdef CONFIG_PM_SLEEP
++static int xhci_mtk_suspend(struct device *dev)
++{
++ struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
++
++ xhci_mtk_host_disable(mtk);
++ xhci_mtk_phy_power_off(mtk);
++ xhci_mtk_clks_disable(mtk);
++ usb_wakeup_enable(mtk);
++ return 0;
++}
++
++static int xhci_mtk_resume(struct device *dev)
++{
++ struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev);
++
++ usb_wakeup_disable(mtk);
++ xhci_mtk_clks_enable(mtk);
++ xhci_mtk_phy_power_on(mtk);
++ xhci_mtk_host_enable(mtk);
++ return 0;
++}
++
++static const struct dev_pm_ops xhci_mtk_pm_ops = {
++ SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume)
++};
++#define DEV_PM_OPS (&xhci_mtk_pm_ops)
++#else
++#define DEV_PM_OPS NULL
++#endif /* CONFIG_PM */
++
++#ifdef CONFIG_OF
++static const struct of_device_id mtk_xhci_of_match[] = {
++ { .compatible = "mediatek,mt8173-xhci"},
++ { },
++};
++MODULE_DEVICE_TABLE(of, mtk_xhci_of_match);
++#endif
++
++static struct platform_driver mtk_xhci_driver = {
++ .probe = xhci_mtk_probe,
++ .remove = xhci_mtk_remove,
++ .driver = {
++ .name = "xhci-mtk",
++ .pm = DEV_PM_OPS,
++ .of_match_table = of_match_ptr(mtk_xhci_of_match),
++ },
++};
++MODULE_ALIAS("platform:xhci-mtk");
++
++static int __init xhci_mtk_init(void)
++{
++ xhci_init_driver(&xhci_mtk_hc_driver, &xhci_mtk_overrides);
++ return platform_driver_register(&mtk_xhci_driver);
++}
++module_init(xhci_mtk_init);
++
++static void __exit xhci_mtk_exit(void)
++{
++ platform_driver_unregister(&mtk_xhci_driver);
++}
++module_exit(xhci_mtk_exit);
++
++MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
++MODULE_DESCRIPTION("MediaTek xHCI Host Controller Driver");
++MODULE_LICENSE("GPL v2");
+--- /dev/null
++++ b/drivers/usb/host/xhci-mtk.h
+@@ -0,0 +1,162 @@
++/*
++ * Copyright (c) 2015 MediaTek Inc.
++ * Author:
++ * Zhigang.Wei <zhigang.wei@mediatek.com>
++ * Chunfeng.Yun <chunfeng.yun@mediatek.com>
++ *
++ * This software is licensed under the terms of the GNU General Public
++ * License version 2, as published by the Free Software Foundation, and
++ * may be copied, distributed, and modified under those terms.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ */
++
++#ifndef _XHCI_MTK_H_
++#define _XHCI_MTK_H_
++
++#include "xhci.h"
++
++/**
++ * To simplify scheduler algorithm, set a upper limit for ESIT,
++ * if a synchromous ep's ESIT is larger than @XHCI_MTK_MAX_ESIT,
++ * round down to the limit value, that means allocating more
++ * bandwidth to it.
++ */
++#define XHCI_MTK_MAX_ESIT 64
++
++/**
++ * struct mu3h_sch_bw_info: schedule information for bandwidth domain
++ *
++ * @bus_bw: array to keep track of bandwidth already used at each uframes
++ * @bw_ep_list: eps in the bandwidth domain
++ *
++ * treat a HS root port as a bandwidth domain, but treat a SS root port as
++ * two bandwidth domains, one for IN eps and another for OUT eps.
++ */
++struct mu3h_sch_bw_info {
++ u32 bus_bw[XHCI_MTK_MAX_ESIT];
++ struct list_head bw_ep_list;
++};
++
++/**
++ * struct mu3h_sch_ep_info: schedule information for endpoint
++ *
++ * @esit: unit is 125us, equal to 2 << Interval field in ep-context
++ * @num_budget_microframes: number of continuous uframes
++ * (@repeat==1) scheduled within the interval
++ * @bw_cost_per_microframe: bandwidth cost per microframe
++ * @endpoint: linked into bandwidth domain which it belongs to
++ * @ep: address of usb_host_endpoint struct
++ * @offset: which uframe of the interval that transfer should be
++ * scheduled first time within the interval
++ * @repeat: the time gap between two uframes that transfers are
++ * scheduled within a interval. in the simple algorithm, only
++ * assign 0 or 1 to it; 0 means using only one uframe in a
++ * interval, and 1 means using @num_budget_microframes
++ * continuous uframes
++ * @pkts: number of packets to be transferred in the scheduled uframes
++ * @cs_count: number of CS that host will trigger
++ * @burst_mode: burst mode for scheduling. 0: normal burst mode,
++ * distribute the bMaxBurst+1 packets for a single burst
++ * according to @pkts and @repeat, repeate the burst multiple
++ * times; 1: distribute the (bMaxBurst+1)*(Mult+1) packets
++ * according to @pkts and @repeat. normal mode is used by
++ * default
++ */
++struct mu3h_sch_ep_info {
++ u32 esit;
++ u32 num_budget_microframes;
++ u32 bw_cost_per_microframe;
++ struct list_head endpoint;
++ void *ep;
++ /*
++ * mtk xHCI scheduling information put into reserved DWs
++ * in ep context
++ */
++ u32 offset;
++ u32 repeat;
++ u32 pkts;
++ u32 cs_count;
++ u32 burst_mode;
++};
++
++#define MU3C_U3_PORT_MAX 4
++#define MU3C_U2_PORT_MAX 5
++
++/**
++ * struct mu3c_ippc_regs: MTK ssusb ip port control registers
++ * @ip_pw_ctr0~3: ip power and clock control registers
++ * @ip_pw_sts1~2: ip power and clock status registers
++ * @ip_xhci_cap: ip xHCI capability register
++ * @u3_ctrl_p[x]: ip usb3 port x control register, only low 4bytes are used
++ * @u2_ctrl_p[x]: ip usb2 port x control register, only low 4bytes are used
++ * @u2_phy_pll: usb2 phy pll control register
++ */
++struct mu3c_ippc_regs {
++ __le32 ip_pw_ctr0;
++ __le32 ip_pw_ctr1;
++ __le32 ip_pw_ctr2;
++ __le32 ip_pw_ctr3;
++ __le32 ip_pw_sts1;
++ __le32 ip_pw_sts2;
++ __le32 reserved0[3];
++ __le32 ip_xhci_cap;
++ __le32 reserved1[2];
++ __le64 u3_ctrl_p[MU3C_U3_PORT_MAX];
++ __le64 u2_ctrl_p[MU3C_U2_PORT_MAX];
++ __le32 reserved2;
++ __le32 u2_phy_pll;
++ __le32 reserved3[33]; /* 0x80 ~ 0xff */
++};
++
++struct xhci_hcd_mtk {
++ struct device *dev;
++ struct usb_hcd *hcd;
++ struct mu3h_sch_bw_info *sch_array;
++ struct mu3c_ippc_regs __iomem *ippc_regs;
++ int num_u2_ports;
++ int num_u3_ports;
++ struct regulator *vusb33;
++ struct regulator *vbus;
++ struct clk *sys_clk; /* sys and mac clock */
++ struct clk *wk_deb_p0; /* port0's wakeup debounce clock */
++ struct clk *wk_deb_p1;
++ struct regmap *pericfg;
++ struct phy **phys;
++ int num_phys;
++ int wakeup_src;
++ bool lpm_support;
++};
++
++static inline struct xhci_hcd_mtk *hcd_to_mtk(struct usb_hcd *hcd)
++{
++ return dev_get_drvdata(hcd->self.controller);
++}
++
++#if IS_ENABLED(CONFIG_USB_XHCI_MTK)
++int xhci_mtk_sch_init(struct xhci_hcd_mtk *mtk);
++void xhci_mtk_sch_exit(struct xhci_hcd_mtk *mtk);
++int xhci_mtk_add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
++ struct usb_host_endpoint *ep);
++void xhci_mtk_drop_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev,
++ struct usb_host_endpoint *ep);
++
++#else
++static inline int xhci_mtk_add_ep_quirk(struct usb_hcd *hcd,
++ struct usb_device *udev, struct usb_host_endpoint *ep)
++{
++ return 0;
++}
++
++static inline void xhci_mtk_drop_ep_quirk(struct usb_hcd *hcd,
++ struct usb_device *udev, struct usb_host_endpoint *ep)
++{
++}
++
++#endif
++
++#endif /* _XHCI_MTK_H_ */
+--- a/drivers/usb/host/xhci-ring.c
++++ b/drivers/usb/host/xhci-ring.c
+@@ -68,6 +68,7 @@
+ #include <linux/slab.h>
+ #include "xhci.h"
+ #include "xhci-trace.h"
++#include "xhci-mtk.h"
+
+ /*
+ * Returns zero if the TRB isn't in this segment, otherwise it returns the DMA
+@@ -3065,17 +3066,22 @@ static u32 xhci_td_remainder(struct xhci
+ {
+ u32 maxp, total_packet_count;
+
+- if (xhci->hci_version < 0x100)
++ /* MTK xHCI is mostly 0.97 but contains some features from 1.0 */
++ if (xhci->hci_version < 0x100 && !(xhci->quirks & XHCI_MTK_HOST))
+ return ((td_total_len - transferred) >> 10);
+
+- maxp = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc));
+- total_packet_count = DIV_ROUND_UP(td_total_len, maxp);
+-
+ /* One TRB with a zero-length data packet. */
+ if (num_trbs_left == 0 || (transferred == 0 && trb_buff_len == 0) ||
+ trb_buff_len == td_total_len)
+ return 0;
+
++ /* for MTK xHCI, TD size doesn't include this TRB */
++ if (xhci->quirks & XHCI_MTK_HOST)
++ trb_buff_len = 0;
++
++ maxp = GET_MAX_PACKET(usb_endpoint_maxp(&urb->ep->desc));
++ total_packet_count = DIV_ROUND_UP(td_total_len, maxp);
++
+ /* Queueing functions don't count the current TRB into transferred */
+ return (total_packet_count - ((transferred + trb_buff_len) / maxp));
+ }
+@@ -3463,7 +3469,7 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *
+ field |= 0x1;
+
+ /* xHCI 1.0/1.1 6.4.1.2.1: Transfer Type field */
+- if (xhci->hci_version >= 0x100) {
++ if ((xhci->hci_version >= 0x100) || (xhci->quirks & XHCI_MTK_HOST)) {
+ if (urb->transfer_buffer_length > 0) {
+ if (setup->bRequestType & USB_DIR_IN)
+ field |= TRB_TX_TYPE(TRB_DATA_IN);
+--- a/drivers/usb/host/xhci.c
++++ b/drivers/usb/host/xhci.c
+@@ -31,6 +31,7 @@
+
+ #include "xhci.h"
+ #include "xhci-trace.h"
++#include "xhci-mtk.h"
+
+ #define DRIVER_AUTHOR "Sarah Sharp"
+ #define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver"
+@@ -634,7 +635,11 @@ int xhci_run(struct usb_hcd *hcd)
+ "// Set the interrupt modulation register");
+ temp = readl(&xhci->ir_set->irq_control);
+ temp &= ~ER_IRQ_INTERVAL_MASK;
+- temp |= (u32) 160;
++ /*
++ * the increment interval is 8 times as much as that defined
++ * in xHCI spec on MTK's controller
++ */
++ temp |= (u32) ((xhci->quirks & XHCI_MTK_HOST) ? 20 : 160);
+ writel(temp, &xhci->ir_set->irq_control);
+
+ /* Set the HCD state before we enable the irqs */
+@@ -1700,6 +1705,9 @@ int xhci_drop_endpoint(struct usb_hcd *h
+
+ xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep);
+
++ if (xhci->quirks & XHCI_MTK_HOST)
++ xhci_mtk_drop_ep_quirk(hcd, udev, ep);
++
+ xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x\n",
+ (unsigned int) ep->desc.bEndpointAddress,
+ udev->slot_id,
+@@ -1795,6 +1803,15 @@ int xhci_add_endpoint(struct usb_hcd *hc
+ return -ENOMEM;
+ }
+
++ if (xhci->quirks & XHCI_MTK_HOST) {
++ ret = xhci_mtk_add_ep_quirk(hcd, udev, ep);
++ if (ret < 0) {
++ xhci_free_or_cache_endpoint_ring(xhci,
++ virt_dev, ep_index);
++ return ret;
++ }
++ }
++
+ ctrl_ctx->add_flags |= cpu_to_le32(added_ctxs);
+ new_add_flags = le32_to_cpu(ctrl_ctx->add_flags);
+
+--- a/drivers/usb/host/xhci.h
++++ b/drivers/usb/host/xhci.h
+@@ -1630,6 +1630,7 @@ struct xhci_hcd {
+ /* For controllers with a broken beyond repair streams implementation */
+ #define XHCI_BROKEN_STREAMS (1 << 19)
+ #define XHCI_PME_STUCK_QUIRK (1 << 20)
++#define XHCI_MTK_HOST (1 << 21)
+ unsigned int num_active_eps;
+ unsigned int limit_active_eps;
+ /* There are two roothubs to keep track of bus suspend info for */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 22:46:28 +0000