| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Chunfeng Yun | 3588 | 97.24% | 28 | 75.68% |
| Angelo G. Del Regno | 50 | 1.36% | 1 | 2.70% |
| Adam Wallis | 19 | 0.51% | 1 | 2.70% |
| Mathias Nyman | 14 | 0.38% | 1 | 2.70% |
| Macpaul Lin | 10 | 0.27% | 1 | 2.70% |
| Frank Wunderlich | 3 | 0.08% | 1 | 2.70% |
| Arnd Bergmann | 2 | 0.05% | 1 | 2.70% |
| Martin Blumenstingl | 2 | 0.05% | 1 | 2.70% |
| Greg Kroah-Hartman | 2 | 0.05% | 2 | 5.41% |
| Total | 3690 | 37 |
// SPDX-License-Identifier: GPL-2.0 /* * MediaTek xHCI Host Controller Driver * * Copyright (c) 2015 MediaTek Inc. * Author: * Chunfeng Yun <chunfeng.yun@mediatek.com> */ #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/platform_device.h> #include <linux/pm_runtime.h> #include <linux/pm_wakeirq.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/reset.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_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) /* 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) /* 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 (0xa << 1) #define ITP_DELTA_CLK_MASK GENMASK(5, 1) #define FRMCNT_LEV1_RANG (0x12b << 8) #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) /* usb remote wakeup registers in syscon */ /* mt8173 etc */ #define PERI_WK_CTRL1 0x4 #define WC1_IS_C(x) (((x) & 0xf) << 26) /* cycle debounce */ #define WC1_IS_EN BIT(25) #define WC1_IS_P BIT(6) /* polarity for ip sleep */ /* mt8183 */ #define PERI_WK_CTRL0 0x0 #define WC0_IS_C(x) ((u32)(((x) & 0xf) << 28)) /* cycle debounce */ #define WC0_IS_P BIT(12) /* polarity */ #define WC0_IS_EN BIT(6) /* mt8192 */ #define WC0_SSUSB0_CDEN BIT(6) #define WC0_IS_SPM_EN BIT(1) /* mt8195 */ #define PERI_WK_CTRL0_8195 0x04 #define WC0_IS_P_95 BIT(30) /* polarity */ #define WC0_IS_C_95(x) ((u32)(((x) & 0x7) << 27)) #define WC0_IS_EN_P3_95 BIT(26) #define WC0_IS_EN_P2_95 BIT(25) #define WC0_IS_EN_P1_95 BIT(24) #define PERI_WK_CTRL1_8195 0x20 #define WC1_IS_C_95(x) ((u32)(((x) & 0xf) << 28)) #define WC1_IS_P_95 BIT(12) #define WC1_IS_EN_P0_95 BIT(6) /* mt2712 etc */ #define PERI_SSUSB_SPM_CTRL 0x0 #define SSC_IP_SLEEP_EN BIT(4) #define SSC_SPM_INT_EN BIT(1) enum ssusb_uwk_vers { SSUSB_UWK_V1 = 1, SSUSB_UWK_V2, SSUSB_UWK_V1_1 = 101, /* specific revision 1.01 */ SSUSB_UWK_V1_2, /* specific revision 1.2 */ SSUSB_UWK_V1_3, /* mt8195 IP0 */ SSUSB_UWK_V1_4, /* mt8195 IP1 */ SSUSB_UWK_V1_5, /* mt8195 IP2 */ SSUSB_UWK_V1_6, /* mt8195 IP3 */ }; /* * 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, add workaround for it. */ static void xhci_mtk_set_frame_interval(struct xhci_hcd_mtk *mtk) { struct device *dev = mtk->dev; struct usb_hcd *hcd = mtk->hcd; u32 value; if (!of_device_is_compatible(dev->of_node, "mediatek,mt8195-xhci")) return; value = readl(hcd->regs + HFCNTR_CFG); value &= ~(ITP_DELTA_CLK_MASK | FRMCNT_LEV1_RANG_MASK); value |= (ITP_DELTA_CLK | FRMCNT_LEV1_RANG); writel(value, hcd->regs + HFCNTR_CFG); value = readl(hcd->regs + LS_EOF_CFG); value &= ~XSEOF_OFFSET_MASK; value |= LSEOF_OFFSET; writel(value, hcd->regs + LS_EOF_CFG); value = readl(hcd->regs + FS_EOF_CFG); value &= ~XSEOF_OFFSET_MASK; value |= FSEOF_OFFSET; writel(value, hcd->regs + FS_EOF_CFG); value = readl(hcd->regs + SS_GEN1_EOF_CFG); value &= ~XSEOF_OFFSET_MASK; value |= SSG1EOF_OFFSET; writel(value, hcd->regs + SS_GEN1_EOF_CFG); value = readl(hcd->regs + SS_GEN2_EOF_CFG); value &= ~XSEOF_OFFSET_MASK; value |= SSG2EOF_OFFSET; writel(value, hcd->regs + SS_GEN2_EOF_CFG); } 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 u3_ports_disabled = 0; int ret; int i; if (!mtk->has_ippc) return 0; /* 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 u3 ports except skipped ones */ for (i = 0; i < mtk->num_u3_ports; i++) { if ((0x1 << i) & mtk->u3p_dis_msk) { u3_ports_disabled++; continue; } 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 except skipped ones */ for (i = 0; i < mtk->num_u2_ports; i++) { if (BIT(i) & mtk->u2p_dis_msk) continue; 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; if (mtk->num_u3_ports > u3_ports_disabled) check_val |= STS1_U3_MAC_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; if (!mtk->has_ippc) return 0; /* power down u3 ports except skipped ones */ for (i = 0; i < mtk->num_u3_ports; i++) { if ((0x1 << i) & mtk->u3p_dis_msk) continue; value = readl(&ippc->u3_ctrl_p[i]); value |= CTRL_U3_PORT_PDN; writel(value, &ippc->u3_ctrl_p[i]); } /* power down all u2 ports except skipped ones */ for (i = 0; i < mtk->num_u2_ports; i++) { if (BIT(i) & mtk->u2p_dis_msk) continue; 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"); else /* workaound for platforms using low level latch */ usleep_range(100, 200); return ret; } static int xhci_mtk_ssusb_config(struct xhci_hcd_mtk *mtk) { struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs; u32 value; if (!mtk->has_ippc) return 0; /* 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); } /* only clocks can be turn off for ip-sleep wakeup mode */ static void usb_wakeup_ip_sleep_set(struct xhci_hcd_mtk *mtk, bool enable) { u32 reg, msk, val; switch (mtk->uwk_vers) { case SSUSB_UWK_V1: reg = mtk->uwk_reg_base + PERI_WK_CTRL1; msk = WC1_IS_EN | WC1_IS_C(0xf) | WC1_IS_P; val = enable ? (WC1_IS_EN | WC1_IS_C(0x8)) : 0; break; case SSUSB_UWK_V1_1: reg = mtk->uwk_reg_base + PERI_WK_CTRL0; msk = WC0_IS_EN | WC0_IS_C(0xf) | WC0_IS_P; val = enable ? (WC0_IS_EN | WC0_IS_C(0x1)) : 0; break; case SSUSB_UWK_V1_2: reg = mtk->uwk_reg_base + PERI_WK_CTRL0; msk = WC0_SSUSB0_CDEN | WC0_IS_SPM_EN; val = enable ? msk : 0; break; case SSUSB_UWK_V1_3: reg = mtk->uwk_reg_base + PERI_WK_CTRL1_8195; msk = WC1_IS_EN_P0_95 | WC1_IS_C_95(0xf) | WC1_IS_P_95; val = enable ? (WC1_IS_EN_P0_95 | WC1_IS_C_95(0x1)) : 0; break; case SSUSB_UWK_V1_4: reg = mtk->uwk_reg_base + PERI_WK_CTRL0_8195; msk = WC0_IS_EN_P1_95 | WC0_IS_C_95(0x7) | WC0_IS_P_95; val = enable ? (WC0_IS_EN_P1_95 | WC0_IS_C_95(0x1)) : 0; break; case SSUSB_UWK_V1_5: reg = mtk->uwk_reg_base + PERI_WK_CTRL0_8195; msk = WC0_IS_EN_P2_95 | WC0_IS_C_95(0x7) | WC0_IS_P_95; val = enable ? (WC0_IS_EN_P2_95 | WC0_IS_C_95(0x1)) : 0; break; case SSUSB_UWK_V1_6: reg = mtk->uwk_reg_base + PERI_WK_CTRL0_8195; msk = WC0_IS_EN_P3_95 | WC0_IS_C_95(0x7) | WC0_IS_P_95; val = enable ? (WC0_IS_EN_P3_95 | WC0_IS_C_95(0x1)) : 0; break; case SSUSB_UWK_V2: reg = mtk->uwk_reg_base + PERI_SSUSB_SPM_CTRL; msk = SSC_IP_SLEEP_EN | SSC_SPM_INT_EN; val = enable ? msk : 0; break; default: return; } regmap_update_bits(mtk->uwk, reg, msk, val); } static int usb_wakeup_of_property_parse(struct xhci_hcd_mtk *mtk, struct device_node *dn) { struct of_phandle_args args; int ret; /* Wakeup function is optional */ mtk->uwk_en = of_property_read_bool(dn, "wakeup-source"); if (!mtk->uwk_en) return 0; ret = of_parse_phandle_with_fixed_args(dn, "mediatek,syscon-wakeup", 2, 0, &args); if (ret) return ret; mtk->uwk_reg_base = args.args[0]; mtk->uwk_vers = args.args[1]; mtk->uwk = syscon_node_to_regmap(args.np); of_node_put(args.np); dev_info(mtk->dev, "uwk - reg:0x%x, version:%d\n", mtk->uwk_reg_base, mtk->uwk_vers); return PTR_ERR_OR_ZERO(mtk->uwk); } static void usb_wakeup_set(struct xhci_hcd_mtk *mtk, bool enable) { if (mtk->uwk_en) usb_wakeup_ip_sleep_set(mtk, enable); } static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk) { struct clk_bulk_data *clks = mtk->clks; clks[0].id = "sys_ck"; clks[1].id = "xhci_ck"; clks[2].id = "ref_ck"; clks[3].id = "mcu_ck"; clks[4].id = "dma_ck"; return devm_clk_bulk_get_optional(mtk->dev, BULK_CLKS_NUM, clks); } static int xhci_mtk_vregs_get(struct xhci_hcd_mtk *mtk) { struct regulator_bulk_data *supplies = mtk->supplies; supplies[0].supply = "vbus"; supplies[1].supply = "vusb33"; return devm_regulator_bulk_get(mtk->dev, BULK_VREGS_NUM, supplies); } 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; if (mtk->u2_lpm_disable) xhci->quirks |= XHCI_HW_LPM_DISABLE; /* * MTK xHCI 0.96: PSA is 1 by default even if doesn't support stream, * and it's 3 when support it. */ if (xhci->hci_version < 0x100 && HCC_MAX_PSA(xhci->hcc_params) == 4) xhci->quirks |= XHCI_BROKEN_STREAMS; } /* 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; /* workaround only for mt8195 */ xhci_mtk_set_frame_interval(mtk); } ret = xhci_gen_setup(hcd, xhci_mtk_quirks); if (ret) return ret; if (usb_hcd_is_primary_hcd(hcd)) ret = xhci_mtk_sch_init(mtk); return ret; } static const struct xhci_driver_overrides xhci_mtk_overrides __initconst = { .reset = xhci_mtk_setup, .add_endpoint = xhci_mtk_add_ep, .drop_endpoint = xhci_mtk_drop_ep, .check_bandwidth = xhci_mtk_check_bandwidth, .reset_bandwidth = xhci_mtk_reset_bandwidth, }; static struct hc_driver __read_mostly xhci_mtk_hc_driver; 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; int ret = -ENODEV; int wakeup_irq; 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; ret = xhci_mtk_vregs_get(mtk); if (ret) return dev_err_probe(dev, ret, "Failed to get regulators\n"); ret = xhci_mtk_clks_get(mtk); if (ret) return ret; irq = platform_get_irq_byname_optional(pdev, "host"); if (irq < 0) { if (irq == -EPROBE_DEFER) return irq; /* for backward compatibility */ irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; } wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup"); if (wakeup_irq == -EPROBE_DEFER) return wakeup_irq; mtk->lpm_support = of_property_read_bool(node, "usb3-lpm-capable"); mtk->u2_lpm_disable = of_property_read_bool(node, "usb2-lpm-disable"); /* optional property, ignore the error if it does not exist */ of_property_read_u32(node, "mediatek,u3p-dis-msk", &mtk->u3p_dis_msk); of_property_read_u32(node, "mediatek,u2p-dis-msk", &mtk->u2p_dis_msk); ret = usb_wakeup_of_property_parse(mtk, node); if (ret) { dev_err(dev, "failed to parse uwk property\n"); return ret; } pm_runtime_set_active(dev); pm_runtime_use_autosuspend(dev); pm_runtime_set_autosuspend_delay(dev, 4000); pm_runtime_enable(dev); pm_runtime_get_sync(dev); ret = regulator_bulk_enable(BULK_VREGS_NUM, mtk->supplies); if (ret) goto disable_pm; ret = clk_bulk_prepare_enable(BULK_CLKS_NUM, mtk->clks); if (ret) goto disable_ldos; ret = device_reset_optional(dev); if (ret) { dev_err_probe(dev, ret, "failed to reset controller\n"); goto disable_clk; } 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_byname(pdev, IORESOURCE_MEM, "mac"); 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_byname(pdev, IORESOURCE_MEM, "ippc"); if (res) { /* ippc register is optional */ mtk->ippc_regs = devm_ioremap_resource(dev, res); if (IS_ERR(mtk->ippc_regs)) { ret = PTR_ERR(mtk->ippc_regs); goto put_usb2_hcd; } mtk->has_ippc = true; } device_init_wakeup(dev, true); xhci = hcd_to_xhci(hcd); xhci->main_hcd = hcd; /* * imod_interval is the interrupt moderation value in nanoseconds. * The increment interval is 8 times as much as that defined in * the xHCI spec on MTK's controller. */ xhci->imod_interval = 5000; device_property_read_u32(dev, "imod-interval-ns", &xhci->imod_interval); xhci->shared_hcd = usb_create_shared_hcd(driver, dev, dev_name(dev), hcd); if (!xhci->shared_hcd) { ret = -ENOMEM; goto disable_device_wakeup; } ret = usb_add_hcd(hcd, irq, IRQF_SHARED); if (ret) goto put_usb3_hcd; if (HCC_MAX_PSA(xhci->hcc_params) >= 4 && !(xhci->quirks & XHCI_BROKEN_STREAMS)) xhci->shared_hcd->can_do_streams = 1; ret = usb_add_hcd(xhci->shared_hcd, irq, IRQF_SHARED); if (ret) goto dealloc_usb2_hcd; if (wakeup_irq > 0) { ret = dev_pm_set_dedicated_wake_irq_reverse(dev, wakeup_irq); if (ret) { dev_err(dev, "set wakeup irq %d failed\n", wakeup_irq); goto dealloc_usb3_hcd; } dev_info(dev, "wakeup irq %d\n", wakeup_irq); } device_enable_async_suspend(dev); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); pm_runtime_forbid(dev); return 0; dealloc_usb3_hcd: usb_remove_hcd(xhci->shared_hcd); xhci->shared_hcd = NULL; dealloc_usb2_hcd: usb_remove_hcd(hcd); put_usb3_hcd: xhci_mtk_sch_exit(mtk); usb_put_hcd(xhci->shared_hcd); disable_device_wakeup: device_init_wakeup(dev, false); put_usb2_hcd: usb_put_hcd(hcd); disable_clk: clk_bulk_disable_unprepare(BULK_CLKS_NUM, mtk->clks); disable_ldos: regulator_bulk_disable(BULK_VREGS_NUM, mtk->supplies); disable_pm: pm_runtime_put_noidle(dev); pm_runtime_disable(dev); return ret; } static int xhci_mtk_remove(struct platform_device *pdev) { struct xhci_hcd_mtk *mtk = platform_get_drvdata(pdev); struct usb_hcd *hcd = mtk->hcd; struct xhci_hcd *xhci = hcd_to_xhci(hcd); struct usb_hcd *shared_hcd = xhci->shared_hcd; struct device *dev = &pdev->dev; pm_runtime_get_sync(dev); xhci->xhc_state |= XHCI_STATE_REMOVING; dev_pm_clear_wake_irq(dev); device_init_wakeup(dev, false); usb_remove_hcd(shared_hcd); xhci->shared_hcd = NULL; usb_remove_hcd(hcd); usb_put_hcd(shared_hcd); usb_put_hcd(hcd); xhci_mtk_sch_exit(mtk); clk_bulk_disable_unprepare(BULK_CLKS_NUM, mtk->clks); regulator_bulk_disable(BULK_VREGS_NUM, mtk->supplies); pm_runtime_disable(dev); pm_runtime_put_noidle(dev); pm_runtime_set_suspended(dev); return 0; } static int __maybe_unused xhci_mtk_suspend(struct device *dev) { struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev); struct usb_hcd *hcd = mtk->hcd; struct xhci_hcd *xhci = hcd_to_xhci(hcd); int ret; xhci_dbg(xhci, "%s: stop port polling\n", __func__); clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); del_timer_sync(&hcd->rh_timer); clear_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); del_timer_sync(&xhci->shared_hcd->rh_timer); ret = xhci_mtk_host_disable(mtk); if (ret) goto restart_poll_rh; clk_bulk_disable_unprepare(BULK_CLKS_NUM, mtk->clks); usb_wakeup_set(mtk, true); return 0; restart_poll_rh: xhci_dbg(xhci, "%s: restart port polling\n", __func__); set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); usb_hcd_poll_rh_status(xhci->shared_hcd); set_bit(HCD_FLAG_POLL_RH, &hcd->flags); usb_hcd_poll_rh_status(hcd); return ret; } static int __maybe_unused xhci_mtk_resume(struct device *dev) { struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev); struct usb_hcd *hcd = mtk->hcd; struct xhci_hcd *xhci = hcd_to_xhci(hcd); int ret; usb_wakeup_set(mtk, false); ret = clk_bulk_prepare_enable(BULK_CLKS_NUM, mtk->clks); if (ret) goto enable_wakeup; ret = xhci_mtk_host_enable(mtk); if (ret) goto disable_clks; xhci_dbg(xhci, "%s: restart port polling\n", __func__); set_bit(HCD_FLAG_POLL_RH, &xhci->shared_hcd->flags); usb_hcd_poll_rh_status(xhci->shared_hcd); set_bit(HCD_FLAG_POLL_RH, &hcd->flags); usb_hcd_poll_rh_status(hcd); return 0; disable_clks: clk_bulk_disable_unprepare(BULK_CLKS_NUM, mtk->clks); enable_wakeup: usb_wakeup_set(mtk, true); return ret; } static int __maybe_unused xhci_mtk_runtime_suspend(struct device *dev) { struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev); struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd); int ret = 0; if (xhci->xhc_state) return -ESHUTDOWN; if (device_may_wakeup(dev)) ret = xhci_mtk_suspend(dev); /* -EBUSY: let PM automatically reschedule another autosuspend */ return ret ? -EBUSY : 0; } static int __maybe_unused xhci_mtk_runtime_resume(struct device *dev) { struct xhci_hcd_mtk *mtk = dev_get_drvdata(dev); struct xhci_hcd *xhci = hcd_to_xhci(mtk->hcd); int ret = 0; if (xhci->xhc_state) return -ESHUTDOWN; if (device_may_wakeup(dev)) ret = xhci_mtk_resume(dev); return ret; } static const struct dev_pm_ops xhci_mtk_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(xhci_mtk_suspend, xhci_mtk_resume) SET_RUNTIME_PM_OPS(xhci_mtk_runtime_suspend, xhci_mtk_runtime_resume, NULL) }; #define DEV_PM_OPS (IS_ENABLED(CONFIG_PM) ? &xhci_mtk_pm_ops : NULL) static const struct of_device_id mtk_xhci_of_match[] = { { .compatible = "mediatek,mt8173-xhci"}, { .compatible = "mediatek,mt8195-xhci"}, { .compatible = "mediatek,mtk-xhci"}, { }, }; MODULE_DEVICE_TABLE(of, mtk_xhci_of_match); 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 = mtk_xhci_of_match, }, }; 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");
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