[U-Boot] [PATCH v3 1/4] USB: gadget: Add the cadence USB3 gadget driver

This driver is ported from NXP i.MX U-Boot version imx_v2019.04 and some changes have also been made to adapt to U-Boot.

Add the Cadence USB3 IP(CDNS3) driver for the gadget (device mode). The CDNS3 gadget driver support DM mode. CONFIG_DM_USB_GADGET should be enabled when use this driver.

Signed-off-by: Sherry Sun sherry.sun@nxp.com --- Makefile | 1 + doc/device-tree-bindings/usb/cdns-usb3.txt | 39 + drivers/usb/Kconfig | 2 + drivers/usb/cdns3/Kconfig | 20 + drivers/usb/cdns3/Makefile | 5 + drivers/usb/cdns3/cdns3-generic.c | 115 + drivers/usb/cdns3/cdns3-nxp-reg-def.h | 89 + drivers/usb/cdns3/core.c | 194 ++ drivers/usb/cdns3/core.h | 118 ++ drivers/usb/cdns3/dev-regs-macro.h | 116 + drivers/usb/cdns3/dev-regs-map.h | 117 ++ drivers/usb/cdns3/gadget-export.h | 26 + drivers/usb/cdns3/gadget.c | 2218 ++++++++++++++++++++ drivers/usb/cdns3/gadget.h | 225 ++ drivers/usb/cdns3/io.h | 30 + drivers/usb/gadget/epautoconf.c | 4 + drivers/usb/gadget/gadget_chips.h | 7 + drivers/usb/gadget/udc/Makefile | 1 + include/linux/usb/gadget.h | 3 + scripts/Makefile.spl | 1 + 20 files changed, 3331 insertions(+) create mode 100644 doc/device-tree-bindings/usb/cdns-usb3.txt create mode 100644 drivers/usb/cdns3/Kconfig create mode 100644 drivers/usb/cdns3/Makefile create mode 100644 drivers/usb/cdns3/cdns3-generic.c create mode 100644 drivers/usb/cdns3/cdns3-nxp-reg-def.h create mode 100644 drivers/usb/cdns3/core.c create mode 100644 drivers/usb/cdns3/core.h create mode 100644 drivers/usb/cdns3/dev-regs-macro.h create mode 100644 drivers/usb/cdns3/dev-regs-map.h create mode 100644 drivers/usb/cdns3/gadget-export.h create mode 100644 drivers/usb/cdns3/gadget.c create mode 100644 drivers/usb/cdns3/gadget.h create mode 100644 drivers/usb/cdns3/io.h

diff --git a/Makefile b/Makefile index 8513db94e3..fab1220114 100644 --- a/Makefile +++ b/Makefile @@ -728,6 +728,7 @@ libs-$(CONFIG_SYS_FSL_DDR) += drivers/ddr/fsl/ libs-$(CONFIG_SYS_FSL_MMDC) += drivers/ddr/fsl/ libs-$(CONFIG_$(SPL_)ALTERA_SDRAM) += drivers/ddr/altera/ libs-y += drivers/serial/ +libs-y += drivers/usb/cdns3/ libs-y += drivers/usb/dwc3/ libs-y += drivers/usb/common/ libs-y += drivers/usb/emul/ diff --git a/doc/device-tree-bindings/usb/cdns-usb3.txt b/doc/device-tree-bindings/usb/cdns-usb3.txt new file mode 100644 index 0000000000..0c8710507d --- /dev/null +++ b/doc/device-tree-bindings/usb/cdns-usb3.txt @@ -0,0 +1,39 @@ +* Cadence USB3 Controller + +Required properties: +- compatible: "cdns,usb3"; +- reg: base address and length of the registers +- interrupts: interrupt for the USB controller +- interrupt-parent: the interrupt parent for this module +- clocks: reference to the USB clock +- clock-names: the name of clocks +- phys: reference to the USB PHY + +Optional properties: +- dr_mode: One of "host", "peripheral" or "otg". Defaults to "otg" +- extcon: extcon phandler for cdns3 device +- power-domains: the power domain for cdns3 controller and phy + +Examples: + +usbotg3: cdns3@5b110000 { + compatible = "cdns,usb3"; + reg = <0x0 0x5B110000 0x0 0x10000>, + <0x0 0x5B130000 0x0 0x10000>, + <0x0 0x5B140000 0x0 0x10000>, + <0x0 0x5B160000 0x0 0x40000>; + interrupt-parent = <&gic>; + interrupts = <GIC_SPI 271 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clk IMX8QM_USB3_LPM_CLK>, + <&clk IMX8QM_USB3_BUS_CLK>, + <&clk IMX8QM_USB3_ACLK>, + <&clk IMX8QM_USB3_IPG_CLK>, + <&clk IMX8QM_USB3_CORE_PCLK>; + clock-names = "usb3_lpm_clk", "usb3_bus_clk", "usb3_aclk", + "usb3_ipg_clk", "usb3_core_pclk"; + power-domains = <&pd_conn_usb2>; + phys = <&usbphy1>; + dr_mode = "otg"; + extcon = <&typec_ptn5150>; + status = "disabled"; +}; diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig index 3b53bf2c58..98f5e936e5 100644 --- a/drivers/usb/Kconfig +++ b/drivers/usb/Kconfig @@ -70,6 +70,8 @@ source "drivers/usb/host/Kconfig"

source "drivers/usb/dwc3/Kconfig"

+source "drivers/usb/cdns3/Kconfig" + source "drivers/usb/musb/Kconfig"

source "drivers/usb/musb-new/Kconfig" diff --git a/drivers/usb/cdns3/Kconfig b/drivers/usb/cdns3/Kconfig new file mode 100644 index 0000000000..11a7144b05 --- /dev/null +++ b/drivers/usb/cdns3/Kconfig @@ -0,0 +1,20 @@ +config USB_CDNS3 + tristate "Cadence USB3 Dual-Role Controller" + depends on (USB && USB_GADGET) + help + Say Y here if your system has a cadence USB3 dual-role controller. + It supports: dual-role switch Host-only, and Peripheral-only. + + When compiled dynamically, the module will be called cdns3.ko. + +if USB_CDNS3 + +config USB_CDNS3_GADGET + bool "Cadence USB3 device controller" + depends on USB_GADGET + select USB_GADGET_DUALSPEED + help + Say Y here to enable device controller functionality of the + cadence usb3 driver. + +endif diff --git a/drivers/usb/cdns3/Makefile b/drivers/usb/cdns3/Makefile new file mode 100644 index 0000000000..374fa06efa --- /dev/null +++ b/drivers/usb/cdns3/Makefile @@ -0,0 +1,5 @@ +obj-$(CONFIG_USB_CDNS3) += cdns3.o + +cdns3-y := core.o +cdns3-$(CONFIG_USB_CDNS3_GADGET) += gadget.o +cdns3-$(CONFIG_$(SPL_)DM_USB_GADGET) += cdns3-generic.o diff --git a/drivers/usb/cdns3/cdns3-generic.c b/drivers/usb/cdns3/cdns3-generic.c new file mode 100644 index 0000000000..01459539c1 --- /dev/null +++ b/drivers/usb/cdns3/cdns3-generic.c @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2019 NXP + */ + +#include <common.h> +#include <asm-generic/io.h> +#include <dm.h> +#include <dm/device-internal.h> +#include <dm/lists.h> +#include <malloc.h> +#include <usb.h> +#include <clk.h> +#include <generic-phy.h> +#include <linux/usb/gadget.h> +#include "core.h" +#include "gadget.h" + +static int cdns3_generic_peripheral_clk_init(struct udevice *dev, + struct cdns3_generic_peripheral + *priv) +{ +#if CONFIG_IS_ENABLED(CLK) + int ret; + + ret = clk_get_bulk(dev, &priv->clks); + if (ret) + return ret; + + ret = clk_enable_bulk(&priv->clks); + if (ret) { + clk_release_bulk(&priv->clks); + return ret; + } +#endif + + return 0; +} + +int dm_usb_gadget_handle_interrupts(struct udevice *dev) +{ + struct cdns3_generic_peripheral *priv = dev_get_priv(dev); + struct cdns3 *cdns3 = &priv->cdns3; + + cdns3_role_irq_handler(cdns3); + + return 0; +} + +static int cdns3_generic_peripheral_probe(struct udevice *dev) +{ + int ret; + struct cdns3_generic_peripheral *priv = dev_get_priv(dev); + struct cdns3 *cdns3 = &priv->cdns3; + + cdns3->dev = dev; + + ret = generic_phy_get_by_index(dev, 0, &priv->phy); + if (ret && ret != -ENOENT) { + printf("Failed to get USB PHY for %s\n", dev->name); + return ret; + } + + ret = cdns3_generic_peripheral_clk_init(dev, priv); + if (ret) + return ret; + + ret = cdns3_init(cdns3); + + return 0; +} + +static int cdns3_generic_peripheral_remove(struct udevice *dev) +{ + struct cdns3_generic_peripheral *priv = dev_get_priv(dev); + struct cdns3 *cdns3 = &priv->cdns3; + + cdns3_exit(cdns3); + + clk_release_bulk(&priv->clks); + + if (generic_phy_valid(&priv->phy)) + device_remove(priv->phy.dev, DM_REMOVE_NORMAL); + + return 0; +} + +static int cdns3_generic_peripheral_ofdata_to_platdata(struct udevice *dev) +{ + struct cdns3_generic_peripheral *priv = dev_get_priv(dev); + struct cdns3 *cdns3 = &priv->cdns3; + + cdns3->none_core_regs = (void __iomem *)devfdt_get_addr_index(dev, 0); + cdns3->xhci_regs = (void __iomem *)devfdt_get_addr_index(dev, 1); + cdns3->dev_regs = (void __iomem *)devfdt_get_addr_index(dev, 2); + cdns3->phy_regs = (void __iomem *)devfdt_get_addr_index(dev, 3); + cdns3->otg_regs = (void __iomem *)devfdt_get_addr_index(dev, 4); + + return 0; +} + +static const struct udevice_id cdns3_generic_peripheral_ids[] = { + { .compatible = "cdns,usb3" }, + {}, +}; + +U_BOOT_DRIVER(cdns3_generic_peripheral) = { + .name = "cdns3-generic-peripheral", + .id = UCLASS_USB_GADGET_GENERIC, + .of_match = cdns3_generic_peripheral_ids, + .ofdata_to_platdata = cdns3_generic_peripheral_ofdata_to_platdata, + .probe = cdns3_generic_peripheral_probe, + .remove = cdns3_generic_peripheral_remove, + .priv_auto_alloc_size = sizeof(struct cdns3_generic_peripheral), +}; diff --git a/drivers/usb/cdns3/cdns3-nxp-reg-def.h b/drivers/usb/cdns3/cdns3-nxp-reg-def.h new file mode 100644 index 0000000000..023f902ec9 --- /dev/null +++ b/drivers/usb/cdns3/cdns3-nxp-reg-def.h @@ -0,0 +1,89 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2019 NXP + */ + +#ifndef __DRIVERS_USB_CDNS3_NXP_H +#define __DRIVERS_USB_CDNS3_NXP_H + +#define USB3_CORE_CTRL1 0x00 +#define USB3_CORE_CTRL2 0x04 +#define USB3_INT_REG 0x08 +#define USB3_CORE_STATUS 0x0c +#define XHCI_DEBUG_LINK_ST 0x10 +#define XHCI_DEBUG_BUS 0x14 +#define USB3_SSPHY_CTRL1 0x40 +#define USB3_SSPHY_CTRL2 0x44 +#define USB3_SSPHY_STATUS 0x4c +#define USB2_PHY_CTRL1 0x50 +#define USB2_PHY_CTRL2 0x54 +#define USB2_PHY_STATUS 0x5c + +/* Register bits definition */ + +/* USB3_CORE_CTRL1 */ +#define SW_RESET_MASK (0x3f << 26) +#define PWR_SW_RESET BIT(31) +#define APB_SW_RESET BIT(30) +#define AXI_SW_RESET BIT(29) +#define RW_SW_RESET BIT(28) +#define PHY_SW_RESET BIT(27) +#define PHYAHB_SW_RESET BIT(26) +#define ALL_SW_RESET (PWR_SW_RESET | APB_SW_RESET | AXI_SW_RESET | \ + RW_SW_RESET | PHY_SW_RESET | PHYAHB_SW_RESET) +#define OC_DISABLE BIT(9) +#define MDCTRL_CLK_SEL BIT(7) +#define MODE_STRAP_MASK (0x7) +#define DEV_MODE BIT(2) +#define HOST_MODE BIT(1) +#define OTG_MODE BIT(0) + +/* USB3_INT_REG */ +#define CLK_125_REQ BIT(29) +#define LPM_CLK_REQ BIT(28) +#define DEVU3_WAEKUP_EN BIT(14) +#define OTG_WAKEUP_EN BIT(12) +#define DEV_INT_EN (3 << 8) /* DEV INT b9:8 */ +#define HOST_INT1_EN BIT(0) /* HOST INT b7:0 */ + +/* USB3_CORE_STATUS */ +#define MDCTRL_CLK_STATUS BIT(15) +#define DEV_POWER_ON_READY BIT(13) +#define HOST_POWER_ON_READY BIT(12) + +/* USB3_SSPHY_STATUS */ +#define PHY_REFCLK_REQ BIT(0) + +/* PHY register definition */ +#define TB_ADDR_TX_RCVDETSC_CTRL (0x4124 * 4) + +/* Register bits definition */ + +/* TB_ADDR_TX_RCVDETSC_CTRL */ +#define RXDET_IN_P3_32KHZ BIT(0) + +/* OTG registers definition */ +#define OTGSTS 0x4 +#define OTGREFCLK 0xc + +/* Register bits definition */ +/* OTGSTS */ +#define OTG_NRDY BIT(11) +/* OTGREFCLK */ +#define OTG_STB_CLK_SWITCH_EN BIT(31) + +/* xHCI registers definition */ +#define XECP_PORT_CAP_REG 0x8000 +#define XECP_PM_PMCSR 0x8018 +#define XECP_AUX_CTRL_REG1 0x8120 + +/* Register bits definition */ +/* XECP_PORT_CAP_REG */ +#define LPM_2_STB_SWITCH_EN BIT(25) + +/* XECP_AUX_CTRL_REG1 */ +#define CFG_RXDET_P3_EN BIT(15) + +/* XECP_PM_PMCSR */ +#define PS_D0 BIT(0) +#endif /* __DRIVERS_USB_CDNS3_NXP_H */ diff --git a/drivers/usb/cdns3/core.c b/drivers/usb/cdns3/core.c new file mode 100644 index 0000000000..5bc3a5e672 --- /dev/null +++ b/drivers/usb/cdns3/core.c @@ -0,0 +1,194 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2016 Cadence Design Systems - https://www.cadence.com/ + * Copyright 2019 NXP + */ +#include <common.h> +#include <malloc.h> +#include <asm/dma-mapping.h> +#include <asm/io.h> +#include <wait_bit.h> +#include <linux/bug.h> +#include <linux/list.h> +#include <linux/compat.h> +#include <linux/usb/gadget.h> +#include <linux/usb/otg.h> + +#include "cdns3-nxp-reg-def.h" +#include "core.h" +#include "gadget-export.h" +#include "gadget.h" + +static void cdns3_reset_core(struct cdns3 *cdns) +{ + /* Set all Reset bits */ + setbits_le32(cdns->none_core_regs + USB3_CORE_CTRL1, ALL_SW_RESET); + udelay(1); +} + +static void cdns3_host_role_set(struct cdns3 *cdns) +{ + int ret; + + struct cdns3_generic_peripheral *priv = container_of(cdns, + struct cdns3_generic_peripheral, cdns3); + + clrsetbits_le32(cdns->none_core_regs + USB3_CORE_CTRL1, + MODE_STRAP_MASK, HOST_MODE | OC_DISABLE); + clrbits_le32(cdns->none_core_regs + USB3_CORE_CTRL1, + PHYAHB_SW_RESET); + mdelay(1); + generic_phy_init(&priv->phy); + setbits_le32(cdns->phy_regs + TB_ADDR_TX_RCVDETSC_CTRL, + RXDET_IN_P3_32KHZ); + udelay(10); + /* Force B Session Valid as 1 */ + writel(0x0060, cdns->phy_regs + 0x380a4); + mdelay(1); + + setbits_le32(cdns->none_core_regs + USB3_INT_REG, HOST_INT1_EN); + + clrbits_le32(cdns->none_core_regs + USB3_CORE_CTRL1, + ALL_SW_RESET); + + dev_dbg(cdns->dev, "wait xhci_power_on_ready\n"); + ret = wait_for_bit_le32(cdns->none_core_regs + USB3_CORE_STATUS, + HOST_POWER_ON_READY, true, 100, false); + if (ret) + dev_err(cdns->dev, "wait xhci_power_on_ready timeout\n"); +} + +static void cdns3_gadget_role_set(struct cdns3 *cdns) +{ + int ret; + + struct cdns3_generic_peripheral *priv = container_of(cdns, + struct cdns3_generic_peripheral, cdns3); + + clrsetbits_le32(cdns->none_core_regs + USB3_CORE_CTRL1, + MODE_STRAP_MASK, DEV_MODE); + clrbits_le32(cdns->none_core_regs + USB3_CORE_CTRL1, + PHYAHB_SW_RESET); + + generic_phy_init(&priv->phy); + setbits_le32(cdns->phy_regs + TB_ADDR_TX_RCVDETSC_CTRL, + RXDET_IN_P3_32KHZ); + udelay(10); + /* Force B Session Valid as 1 */ + writel(0x0060, cdns->phy_regs + 0x380a4); + setbits_le32(cdns->none_core_regs + USB3_INT_REG, DEV_INT_EN); + + clrbits_le32(cdns->none_core_regs + USB3_CORE_CTRL1, + ALL_SW_RESET); + + dev_dbg(cdns->dev, "wait gadget_power_on_ready\n"); + ret = wait_for_bit_le32(cdns->none_core_regs + USB3_CORE_STATUS, + DEV_POWER_ON_READY, true, 100, false); + if (ret) + dev_err(cdns->dev, "wait gadget_power_on_ready timeout\n"); +} + +static void cdns3_set_role(struct cdns3 *cdns, enum cdns3_roles role) +{ + u32 value; + int ret; + + if (role == CDNS3_ROLE_END) + return; + + /* Wait clk value */ + value = readl(cdns->none_core_regs + USB3_SSPHY_STATUS); + writel(value, cdns->none_core_regs + USB3_SSPHY_STATUS); + udelay(1); + ret = wait_for_bit_le32(cdns->none_core_regs + USB3_SSPHY_STATUS, + 0xf0000000, true, 100, false); + if (ret) + dev_err(cdns->dev, "wait clkvld timeout\n"); + + cdns3_reset_core(cdns); + + if (role == CDNS3_ROLE_HOST) { + cdns3_host_role_set(cdns); + dev_dbg(cdns->dev, "switch to host role successfully\n"); + } else { /* gadget mode */ + cdns3_gadget_role_set(cdns); + dev_dbg(cdns->dev, "switch to gadget role successfully\n"); + } +} + +static enum cdns3_roles cdns3_get_role(struct cdns3 *cdns) +{ + return cdns->roles[CDNS3_ROLE_HOST] + ? CDNS3_ROLE_HOST + : CDNS3_ROLE_GADGET; +} + +/** + * cdns3_core_init_role - initialize role of operation + * @cdns: Pointer to cdns3 structure + * @dr_mode: Role mode of device + * + * Returns 0 on success otherwise negative errno + */ +static int cdns3_core_init_role(struct cdns3 *cdns, enum usb_dr_mode dr_mode) +{ + cdns->role = CDNS3_ROLE_END; + if (dr_mode == USB_DR_MODE_UNKNOWN) + dr_mode = USB_DR_MODE_OTG; + + /* Currently, only support gadget mode */ + if (dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_HOST) { + dev_err(cdns->dev, "doesn't support host and OTG, only for gadget\n"); + return -EPERM; + } + + if (dr_mode == USB_DR_MODE_PERIPHERAL) { + if (cdns3_gadget_init(cdns)) + dev_info(cdns->dev, "doesn't support gadget\n"); + } + + if (!cdns->roles[CDNS3_ROLE_HOST] && !cdns->roles[CDNS3_ROLE_GADGET]) { + dev_err(cdns->dev, "no supported roles\n"); + return -ENODEV; + } + + return 0; +} + +static void cdns3_remove_roles(struct cdns3 *cdns) +{ + /* Only support gadget */ + cdns3_gadget_remove(cdns); +} + +int cdns3_init(struct cdns3 *cdns) +{ + int ret; + + ret = cdns3_core_init_role(cdns, USB_DR_MODE_PERIPHERAL); + + cdns->role = cdns3_get_role(cdns); + dev_dbg(dev, "the init role is %d\n", cdns->role); + cdns3_set_role(cdns, cdns->role); + ret = cdns3_role_start(cdns, cdns->role); + if (ret) { + dev_err(dev, "can't start %s role\n", cdns3_role(cdns)->name); + goto err; + } + + dev_dbg(dev, "Cadence USB3 core: probe succeed\n"); + + return 0; + +err: + cdns3_remove_roles(cdns); + + return ret; +} + +void cdns3_exit(struct cdns3 *cdns) +{ + cdns3_role_stop(cdns); + cdns3_remove_roles(cdns); + cdns3_reset_core(cdns); +} diff --git a/drivers/usb/cdns3/core.h b/drivers/usb/cdns3/core.h new file mode 100644 index 0000000000..d097678e52 --- /dev/null +++ b/drivers/usb/cdns3/core.h @@ -0,0 +1,118 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2019 NXP + */ + +#ifndef __DRIVERS_USB_CDNS3_CORE_H +#define __DRIVERS_USB_CDNS3_CORE_H + +struct cdns3; +enum cdns3_roles { + CDNS3_ROLE_HOST = 0, + CDNS3_ROLE_GADGET, + CDNS3_ROLE_END, +}; + +/** + * struct cdns3_role_driver - host/gadget role driver + * @start: start this role + * @stop: stop this role + * @suspend: suspend callback for this role + * @resume: resume callback for this role + * @irq: irq handler for this role + * @name: role name string (host/gadget) + */ +struct cdns3_role_driver { + int (*start)(struct cdns3 *cdns); + void (*stop)(struct cdns3 *cdns); + int (*suspend)(struct cdns3 *cdns, bool do_wakeup); + int (*resume)(struct cdns3 *cdns, bool hibernated); + int (*irq)(struct cdns3 *cdns); + const char *name; +}; + +#define CDNS3_NUM_OF_CLKS 5 +/** + * struct cdns3 - Representation of Cadence USB3 DRD controller. + * @dev: pointer to Cadence device struct + * @xhci_regs: pointer to base of xhci registers + * @xhci_res: the resource for xhci + * @dev_regs: pointer to base of dev registers + * @none_core_regs: pointer to base of nxp wrapper registers + * @phy_regs: pointer to base of phy registers + * @otg_regs: pointer to base of otg registers + * @irq: irq number for controller + * @roles: array of supported roles for this controller + * @role: current role + * @host_dev: the child host device pointer for cdns3 core + * @gadget_dev: the child gadget device pointer for cdns3 core + * @usbphy: usbphy for this controller + * @cdns3_clks: Clock pointer array for cdns3 core + * @extcon: Type-C extern connector + * @extcon_nb: notifier block for Type-C extern connector + * @role_switch_wq: work queue item for role switch + * @in_lpm: the controller in low power mode + * @wakeup_int: the wakeup interrupt + */ +struct cdns3 { + struct udevice *dev; + void __iomem *xhci_regs; + struct resource *xhci_res; + struct usbss_dev_register_block_type __iomem *dev_regs; + void __iomem *none_core_regs; + void __iomem *phy_regs; + void __iomem *otg_regs; + int irq; + struct cdns3_role_driver *roles[CDNS3_ROLE_END]; + enum cdns3_roles role; + struct udevice *host_dev; + struct udevice *gadget_dev; + struct clk *cdns3_clks[CDNS3_NUM_OF_CLKS]; + + int index; + struct list_head list; +}; + +static inline struct cdns3_role_driver *cdns3_role(struct cdns3 *cdns) +{ + WARN_ON(cdns->role >= CDNS3_ROLE_END || !cdns->roles[cdns->role]); + return cdns->roles[cdns->role]; +} + +static inline int cdns3_role_start(struct cdns3 *cdns, enum cdns3_roles role) +{ + if (role >= CDNS3_ROLE_END) + return 0; + + if (!cdns->roles[role]) + return -ENXIO; + + cdns->role = role; + return cdns->roles[role]->start(cdns); +} + +static inline void cdns3_role_stop(struct cdns3 *cdns) +{ + enum cdns3_roles role = cdns->role; + + if (role == CDNS3_ROLE_END) + return; + + cdns->roles[role]->stop(cdns); + cdns->role = CDNS3_ROLE_END; +} + +static inline void cdns3_role_irq_handler(struct cdns3 *cdns) +{ + enum cdns3_roles role = cdns->role; + + if (role == CDNS3_ROLE_END) + return; + + cdns->roles[role]->irq(cdns); +} + +int cdns3_init(struct cdns3 *cdns); +void cdns3_exit(struct cdns3 *cdns); + +#endif /* __DRIVERS_USB_CDNS3_CORE_H */ diff --git a/drivers/usb/cdns3/dev-regs-macro.h b/drivers/usb/cdns3/dev-regs-macro.h new file mode 100644 index 0000000000..7c8ea81d1e --- /dev/null +++ b/drivers/usb/cdns3/dev-regs-macro.h @@ -0,0 +1,116 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2016 Cadence Design Systems - http://www.cadence.com + * Copyright 2019 NXP + */ + +#ifndef __REG_USBSS_DEV_ADDR_MAP_MACRO_H__ +#define __REG_USBSS_DEV_ADDR_MAP_MACRO_H__ + +/* macros for field CFGRST */ +#define USB_CONF__CFGRST__MASK 0x00000001U +#define USB_CONF__CFGSET__MASK 0x00000002U +#define USB_CONF__USB3DIS__MASK 0x00000008U +#define USB_CONF__DEVEN__MASK 0x00004000U +#define USB_CONF__DEVDS__MASK 0x00008000U +#define USB_CONF__L1EN__MASK 0x00010000U +#define USB_CONF__L1DS__MASK 0x00020000U +#define USB_CONF__CLK2OFFDS__MASK 0x00080000U +#define USB_CONF__U1EN__MASK 0x01000000U +#define USB_CONF__U1DS__MASK 0x02000000U +#define USB_CONF__U2EN__MASK 0x04000000U +#define USB_CONF__U2DS__MASK 0x08000000U + +/* macros for field CFGSTS */ +#define USB_STS__CFGSTS__MASK 0x00000001U +#define USB_STS__USBSPEED__READ(src) (((u32)(src) & 0x00000070U) >> 4) + +/* macros for field ENDIAN_MIRROR */ +#define USB_STS__LPMST__READ(src) (((u32)(src) & 0x000c0000U) >> 18) + +/* macros for field USB2CONS */ +#define USB_STS__U1ENS__MASK 0x01000000U +#define USB_STS__U2ENS__MASK 0x02000000U +#define USB_STS__LST__READ(src) (((u32)(src) & 0x3c000000U) >> 26) + +/* macros for field SET_ADDR */ +#define USB_CMD__SET_ADDR__MASK 0x00000001U +#define USB_CMD__STMODE 0x00000200U +#define USB_CMD__TMODE_SEL(x) (x << 10) +#define USB_CMD__FADDR__WRITE(src) (((u32)(src) << 1) & 0x000000feU) + +/* macros for field CONIEN */ +#define USB_IEN__CONIEN__MASK 0x00000001U +#define USB_IEN__DISIEN__MASK 0x00000002U +#define USB_IEN__UWRESIEN__MASK 0x00000004U +#define USB_IEN__UHRESIEN__MASK 0x00000008U +#define USB_IEN__U3EXTIEN__MASK 0x00000020U +#define USB_IEN__CON2IEN__MASK 0x00010000U +#define USB_IEN__U2RESIEN__MASK 0x00040000U +#define USB_IEN__L2ENTIEN__MASK 0x00100000U +#define USB_IEN__L2EXTIEN__MASK 0x00200000U + +/* macros for field CONI */ +#define USB_ISTS__CONI__SHIFT 0 +#define USB_ISTS__DISI__SHIFT 1 +#define USB_ISTS__UWRESI__SHIFT 2 +#define USB_ISTS__UHRESI__SHIFT 3 +#define USB_ISTS__U3EXTI__SHIFT 5 +#define USB_ISTS__CON2I__SHIFT 16 +#define USB_ISTS__DIS2I__SHIFT 17 +#define USB_ISTS__DIS2I__MASK 0x00020000U +#define USB_ISTS__U2RESI__SHIFT 18 +#define USB_ISTS__L2ENTI__SHIFT 20 +#define USB_ISTS__L2EXTI__SHIFT 21 + +/* macros for field TRADDR */ +#define EP_TRADDR__TRADDR__WRITE(src) ((u32)(src) & 0xffffffffU) + +/* macros for field ENABLE */ +#define EP_CFG__ENABLE__MASK 0x00000001U +#define EP_CFG__EPTYPE__WRITE(src) (((u32)(src) << 1) & 0x00000006U) +#define EP_CFG__MAXBURST__WRITE(src) (((u32)(src) << 8) & 0x00000f00U) +#define EP_CFG__MAXPKTSIZE__WRITE(src) (((u32)(src) << 16) & 0x07ff0000U) +#define EP_CFG__BUFFERING__WRITE(src) (((u32)(src) << 27) & 0xf8000000U) + +/* macros for field EPRST */ +#define EP_CMD__EPRST__MASK 0x00000001U +#define EP_CMD__SSTALL__MASK 0x00000002U +#define EP_CMD__CSTALL__MASK 0x00000004U +#define EP_CMD__ERDY__MASK 0x00000008U +#define EP_CMD__REQ_CMPL__MASK 0x00000020U +#define EP_CMD__DRDY__MASK 0x00000040U +#define EP_CMD__DFLUSH__MASK 0x00000080U + +/* macros for field SETUP */ +#define EP_STS__SETUP__MASK 0x00000001U +#define EP_STS__STALL__MASK 0x00000002U +#define EP_STS__IOC__MASK 0x00000004U +#define EP_STS__ISP__MASK 0x00000008U +#define EP_STS__DESCMIS__MASK 0x00000010U +#define EP_STS__TRBERR__MASK 0x00000080U +#define EP_STS__NRDY__MASK 0x00000100U +#define EP_STS__DBUSY__MASK 0x00000200U +#define EP_STS__OUTSMM__MASK 0x00004000U +#define EP_STS__ISOERR__MASK 0x00008000U + +/* macros for field SETUPEN */ +#define EP_STS_EN__SETUPEN__MASK 0x00000001U +#define EP_STS_EN__DESCMISEN__MASK 0x00000010U +#define EP_STS_EN__TRBERREN__MASK 0x00000080U + +/* macros for field EOUTEN0 */ +#define EP_IEN__EOUTEN0__MASK 0x00000001U +#define EP_IEN__EINEN0__MASK 0x00010000U + +/* macros for field EOUT0 */ +#define EP_ISTS__EOUT0__MASK 0x00000001U +#define EP_ISTS__EIN0__MASK 0x00010000U + +/* macros for field LFPS_MIN_DET_U1_EXIT */ +#define DBG_LINK1__LFPS_MIN_GEN_U1_EXIT__WRITE(src) \ + (((u32)(src)\ + << 8) & 0x0000ff00U) +#define DBG_LINK1__LFPS_MIN_GEN_U1_EXIT_SET__MASK 0x02000000U + +#endif /* __REG_USBSS_DEV_ADDR_MAP_MACRO_H__ */ diff --git a/drivers/usb/cdns3/dev-regs-map.h b/drivers/usb/cdns3/dev-regs-map.h new file mode 100644 index 0000000000..c2d43068b7 --- /dev/null +++ b/drivers/usb/cdns3/dev-regs-map.h @@ -0,0 +1,117 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2016 Cadence Design Systems - http://www.cadence.com + * Copyright 2019 NXP + */ + +#ifndef __REG_USBSS_DEV_ADDR_MAP_H__ +#define __REG_USBSS_DEV_ADDR_MAP_H__ + +#include "dev-regs-macro.h" + +struct usbss_dev_register_block_type { + u32 usb_conf; /* 0x0 - 0x4 */ + u32 usb_sts; /* 0x4 - 0x8 */ + u32 usb_cmd; /* 0x8 - 0xc */ + u32 usb_iptn; /* 0xc - 0x10 */ + u32 usb_lpm; /* 0x10 - 0x14 */ + u32 usb_ien; /* 0x14 - 0x18 */ + u32 usb_ists; /* 0x18 - 0x1c */ + u32 ep_sel; /* 0x1c - 0x20 */ + u32 ep_traddr; /* 0x20 - 0x24 */ + u32 ep_cfg; /* 0x24 - 0x28 */ + u32 ep_cmd; /* 0x28 - 0x2c */ + u32 ep_sts; /* 0x2c - 0x30 */ + u32 ep_sts_sid; /* 0x30 - 0x34 */ + u32 ep_sts_en; /* 0x34 - 0x38 */ + u32 drbl; /* 0x38 - 0x3c */ + u32 ep_ien; /* 0x3c - 0x40 */ + u32 ep_ists; /* 0x40 - 0x44 */ + u32 usb_pwr; /* 0x44 - 0x48 */ + u32 usb_conf2; /* 0x48 - 0x4c */ + u32 usb_cap1; /* 0x4c - 0x50 */ + u32 usb_cap2; /* 0x50 - 0x54 */ + u32 usb_cap3; /* 0x54 - 0x58 */ + u32 usb_cap4; /* 0x58 - 0x5c */ + u32 usb_cap5; /* 0x5c - 0x60 */ + u32 PAD2_73; /* 0x60 - 0x64 */ + u32 usb_cpkt1; /* 0x64 - 0x68 */ + u32 usb_cpkt2; /* 0x68 - 0x6c */ + u32 usb_cpkt3; /* 0x6c - 0x70 */ + char pad__0[0x90]; /* 0x70 - 0x100 */ + u32 PAD2_78; /* 0x100 - 0x104 */ + u32 dbg_link1; /* 0x104 - 0x108 */ + u32 PAD2_80; /* 0x108 - 0x10c */ + u32 PAD2_81; /* 0x10c - 0x110 */ + u32 PAD2_82; /* 0x110 - 0x114 */ + u32 PAD2_83; /* 0x114 - 0x118 */ + u32 PAD2_84; /* 0x118 - 0x11c */ + u32 PAD2_85; /* 0x11c - 0x120 */ + u32 PAD2_86; /* 0x120 - 0x124 */ + u32 PAD2_87; /* 0x124 - 0x128 */ + u32 PAD2_88; /* 0x128 - 0x12c */ + u32 PAD2_89; /* 0x12c - 0x130 */ + u32 PAD2_90; /* 0x130 - 0x134 */ + u32 PAD2_91; /* 0x134 - 0x138 */ + u32 PAD2_92; /* 0x138 - 0x13c */ + u32 PAD2_93; /* 0x13c - 0x140 */ + u32 PAD2_94; /* 0x140 - 0x144 */ + u32 PAD2_95; /* 0x144 - 0x148 */ + u32 PAD2_96; /* 0x148 - 0x14c */ + u32 PAD2_97; /* 0x14c - 0x150 */ + u32 PAD2_98; /* 0x150 - 0x154 */ + u32 PAD2_99; /* 0x154 - 0x158 */ + u32 PAD2_100; /* 0x158 - 0x15c */ + u32 PAD2_101; /* 0x15c - 0x160 */ + u32 PAD2_102; /* 0x160 - 0x164 */ + u32 PAD2_103; /* 0x164 - 0x168 */ + u32 PAD2_104; /* 0x168 - 0x16c */ + u32 PAD2_105; /* 0x16c - 0x170 */ + u32 PAD2_106; /* 0x170 - 0x174 */ + u32 PAD2_107; /* 0x174 - 0x178 */ + u32 PAD2_108; /* 0x178 - 0x17c */ + u32 PAD2_109; /* 0x17c - 0x180 */ + u32 PAD2_110; /* 0x180 - 0x184 */ + u32 PAD2_111; /* 0x184 - 0x188 */ + u32 PAD2_112; /* 0x188 - 0x18c */ + char pad__1[0x20]; /* 0x18c - 0x1ac */ + u32 PAD2_114; /* 0x1ac - 0x1b0 */ + u32 PAD2_115; /* 0x1b0 - 0x1b4 */ + u32 PAD2_116; /* 0x1b4 - 0x1b8 */ + u32 PAD2_117; /* 0x1b8 - 0x1bc */ + u32 PAD2_118; /* 0x1bc - 0x1c0 */ + u32 PAD2_119; /* 0x1c0 - 0x1c4 */ + u32 PAD2_120; /* 0x1c4 - 0x1c8 */ + u32 PAD2_121; /* 0x1c8 - 0x1cc */ + u32 PAD2_122; /* 0x1cc - 0x1d0 */ + u32 PAD2_123; /* 0x1d0 - 0x1d4 */ + u32 PAD2_124; /* 0x1d4 - 0x1d8 */ + u32 PAD2_125; /* 0x1d8 - 0x1dc */ + u32 PAD2_126; /* 0x1dc - 0x1e0 */ + u32 PAD2_127; /* 0x1e0 - 0x1e4 */ + u32 PAD2_128; /* 0x1e4 - 0x1e8 */ + u32 PAD2_129; /* 0x1e8 - 0x1ec */ + u32 PAD2_130; /* 0x1ec - 0x1f0 */ + u32 PAD2_131; /* 0x1f0 - 0x1f4 */ + u32 PAD2_132; /* 0x1f4 - 0x1f8 */ + u32 PAD2_133; /* 0x1f8 - 0x1fc */ + u32 PAD2_134; /* 0x1fc - 0x200 */ + u32 PAD2_135; /* 0x200 - 0x204 */ + u32 PAD2_136; /* 0x204 - 0x208 */ + u32 PAD2_137; /* 0x208 - 0x20c */ + u32 PAD2_138; /* 0x20c - 0x210 */ + u32 PAD2_139; /* 0x210 - 0x214 */ + u32 PAD2_140; /* 0x214 - 0x218 */ + u32 PAD2_141; /* 0x218 - 0x21c */ + u32 PAD2_142; /* 0x21c - 0x220 */ + u32 PAD2_143; /* 0x220 - 0x224 */ + u32 PAD2_144; /* 0x224 - 0x228 */ + char pad__2[0xd8]; /* 0x228 - 0x300 */ + u32 dma_axi_ctrl; /* 0x300 - 0x304 */ + u32 PAD2_147; /* 0x304 - 0x308 */ + u32 PAD2_148; /* 0x308 - 0x30c */ + u32 PAD2_149; /* 0x30c - 0x310 */ + u32 PAD2_150; /* 0x310 - 0x314 */ +}; + +#endif /* __REG_USBSS_DEV_ADDR_MAP_H__ */ diff --git a/drivers/usb/cdns3/gadget-export.h b/drivers/usb/cdns3/gadget-export.h new file mode 100644 index 0000000000..0b011b56c6 --- /dev/null +++ b/drivers/usb/cdns3/gadget-export.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2019 NXP + */ + +#ifndef __CDNS3_GADGET_EXPORT_H +#define __CDNS3_GADGET_EXPORT_H + +#ifdef CONFIG_USB_CDNS3_GADGET + +int cdns3_gadget_init(struct cdns3 *cdns); +void cdns3_gadget_remove(struct cdns3 *cdns); +#else + +static inline int cdns3_gadget_init(struct cdns3 *cdns) +{ + return -ENXIO; +} + +static inline void cdns3_gadget_remove(struct cdns3 *cdns) +{ +} + +#endif + +#endif /* __CDNS3_GADGET_EXPORT_H */ diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c new file mode 100644 index 0000000000..60d4ca577a --- /dev/null +++ b/drivers/usb/cdns3/gadget.c @@ -0,0 +1,2218 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2016 Cadence Design Systems - https://www.cadence.com/ + * Copyright 2019 NXP + */ +#include <common.h> +#include <malloc.h> +#include <asm/dma-mapping.h> +#include <asm/io.h> +#include <linux/bug.h> +#include <linux/list.h> +#include <linux/compat.h> + +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <linux/usb/composite.h> + +#include "core.h" +#include "gadget-export.h" +#include "gadget.h" +#include "io.h" + +static void __cdns3_gadget_start(struct usb_ss_dev *usb_ss); +static void cdns_prepare_setup_packet(struct usb_ss_dev *usb_ss); +static void cdns_ep_config(struct usb_ss_endpoint *usb_ss_ep); + +static const char *const speed_names[] = { + [USB_SPEED_UNKNOWN] = "UNKNOWN", + [USB_SPEED_LOW] = "low-speed", + [USB_SPEED_FULL] = "full-speed", + [USB_SPEED_HIGH] = "high-speed", + [USB_SPEED_WIRELESS] = "wireless", + [USB_SPEED_SUPER] = "super-speed", +}; + +const char *usb_speed_string(enum usb_device_speed speed) +{ + if (speed < 0 || speed >= ARRAY_SIZE(speed_names)) + speed = USB_SPEED_UNKNOWN; + return speed_names[speed]; +} + +static struct usb_endpoint_descriptor cdns3_gadget_ep0_desc = { + .bLength = USB_DT_ENDPOINT_SIZE, + .bDescriptorType = USB_DT_ENDPOINT, + .bmAttributes = USB_ENDPOINT_XFER_CONTROL, +}; + +/** + * next_request - returns next request from list + * @list: list containing requests + * + * Returns request or NULL if no requests in list + */ +static struct usb_request *next_request(struct list_head *list) +{ + if (list_empty(list)) + return NULL; + return list_first_entry(list, struct usb_request, list); +} + +/** + * select_ep - selects endpoint + * @usb_ss: extended gadget object + * @ep: endpoint address + */ +static void select_ep(struct usb_ss_dev *usb_ss, u32 ep) +{ + if (!usb_ss || !usb_ss->regs) { + dev_err(&usb_ss->dev, "Failed to select endpoint!\n"); + return; + } + + cdns_writel(&usb_ss->regs->ep_sel, ep); +} + +/** + * usb_ss_allocate_trb_pool - Allocates TRB's pool for selected endpoint + * @usb_ss_ep: extended endpoint object + * + * Function will return 0 on success or -ENOMEM on allocation error + */ +static int usb_ss_allocate_trb_pool(struct usb_ss_endpoint *usb_ss_ep) +{ + if (usb_ss_ep->trb_pool) + return 0; + + usb_ss_ep->trb_pool = + dma_alloc_coherent(sizeof(struct usb_ss_trb) * USB_SS_TRBS_NUM, + (unsigned long *)&usb_ss_ep->trb_pool_dma); + + if (!usb_ss_ep->trb_pool) { + dev_err(&usb_ss_ep->usb_ss->dev, + "Failed to allocate TRB pool for endpoint %s\n", + usb_ss_ep->name); + return -ENOMEM; + } + + memset(usb_ss_ep->trb_pool, 0, + sizeof(struct usb_ss_trb) * USB_SS_TRBS_NUM); + + return 0; +} + +/** + * cdns_ep_stall_flush - Stalls and flushes selected endpoint + * @usb_ss_ep: extended endpoint object + * + * Endpoint must be selected before call to this function + */ +static void cdns_ep_stall_flush(struct usb_ss_endpoint *usb_ss_ep) +{ + struct usb_ss_dev *usb_ss = usb_ss_ep->usb_ss; + + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__DFLUSH__MASK | EP_CMD__ERDY__MASK | + EP_CMD__SSTALL__MASK); + + /* wait for DFLUSH cleared */ + while (cdns_readl(&usb_ss->regs->ep_cmd) & + EP_CMD__DFLUSH__MASK) + ; + + usb_ss_ep->stalled_flag = 1; +} + +/** + * cdns_ep0_config - Configures default endpoint + * @usb_ss: extended gadget object + * + * Functions sets parameters: maximal packet size and enables interrupts + */ +static void cdns_ep0_config(struct usb_ss_dev *usb_ss) +{ + u32 max_packet_size = 0; + + switch (usb_ss->gadget.speed) { + case USB_SPEED_UNKNOWN: + max_packet_size = ENDPOINT_MAX_PACKET_SIZE_0; + usb_ss->gadget.ep0->maxpacket = ENDPOINT_MAX_PACKET_SIZE_0; + cdns3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(0); + break; + + case USB_SPEED_LOW: + max_packet_size = ENDPOINT_MAX_PACKET_SIZE_8; + usb_ss->gadget.ep0->maxpacket = ENDPOINT_MAX_PACKET_SIZE_8; + cdns3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8); + break; + + case USB_SPEED_FULL: + case USB_SPEED_HIGH: + case USB_SPEED_WIRELESS: + max_packet_size = ENDPOINT_MAX_PACKET_SIZE_64; + usb_ss->gadget.ep0->maxpacket = ENDPOINT_MAX_PACKET_SIZE_64; + cdns3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(64); + break; + + case USB_SPEED_SUPER: + max_packet_size = ENDPOINT_MAX_PACKET_SIZE_512; + usb_ss->gadget.ep0->maxpacket = ENDPOINT_MAX_PACKET_SIZE_512; + cdns3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); + break; + } + + /* init ep out */ + select_ep(usb_ss, USB_DIR_OUT); + + cdns_writel(&usb_ss->regs->ep_cfg, + EP_CFG__ENABLE__MASK | + EP_CFG__MAXPKTSIZE__WRITE(max_packet_size)); + cdns_writel(&usb_ss->regs->ep_sts_en, + EP_STS_EN__SETUPEN__MASK | + EP_STS_EN__DESCMISEN__MASK | + EP_STS_EN__TRBERREN__MASK); + + /* init ep in */ + select_ep(usb_ss, USB_DIR_IN); + + cdns_writel(&usb_ss->regs->ep_cfg, + EP_CFG__ENABLE__MASK | + EP_CFG__MAXPKTSIZE__WRITE(max_packet_size)); + cdns_writel(&usb_ss->regs->ep_sts_en, + EP_STS_EN__SETUPEN__MASK | + EP_STS_EN__TRBERREN__MASK); + + cdns_prepare_setup_packet(usb_ss); +} + +/** + * cdns_gadget_unconfig - Unconfigures device controller + * @usb_ss: extended gadget object + */ +static void cdns_gadget_unconfig(struct usb_ss_dev *usb_ss) +{ + /* RESET CONFIGURATION */ + cdns_writel(&usb_ss->regs->usb_conf, + USB_CONF__CFGRST__MASK); + + usb_ss->hw_configured_flag = 0; +} + +/** + * cdns_ep0_run_transfer - Do transfer on default endpoint hardware + * @usb_ss: extended gadget object + * @dma_addr: physical address where data is/will be stored + * @length: data length + * @erdy: set it to 1 when ERDY packet should be sent - + * exit from flow control state + */ +static void cdns_ep0_run_transfer(struct usb_ss_dev *usb_ss, + dma_addr_t dma_addr, + unsigned int length, int erdy) +{ + usb_ss->trb_ep0[0] = TRB_SET_DATA_BUFFER_POINTER(dma_addr); + usb_ss->trb_ep0[1] = TRB_SET_TRANSFER_LENGTH((u32)length); + usb_ss->trb_ep0[2] = TRB_SET_CYCLE_BIT | + TRB_SET_INT_ON_COMPLETION | TRB_TYPE_NORMAL; + + cdns_flush_cache((uintptr_t)usb_ss->trb_ep0, 20); + cdns_flush_cache((uintptr_t)dma_addr, length); + + dev_dbg(&usb_ss->dev, "DRBL(%02X)\n", + usb_ss->ep0_data_dir ? USB_DIR_IN : USB_DIR_OUT); + + select_ep(usb_ss, usb_ss->ep0_data_dir + ? USB_DIR_IN : USB_DIR_OUT); + + cdns_writel(&usb_ss->regs->ep_traddr, + EP_TRADDR__TRADDR__WRITE(usb_ss->trb_ep0_dma)); + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__DRDY__MASK); /* drbl */ + + if (erdy) + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__ERDY__MASK); +} + +/** + * cdns_ep_run_transfer - Do transfer on no-default endpoint hardware + * @usb_ss_ep: extended endpoint object + * + * Returns zero on success or negative value on failure + */ +static int cdns_ep_run_transfer(struct usb_ss_endpoint *usb_ss_ep) +{ + dma_addr_t trb_dma; + struct usb_request *request = next_request(&usb_ss_ep->request_list); + struct usb_ss_dev *usb_ss = usb_ss_ep->usb_ss; + struct usb_ss_trb *trb; + + if (!request) + return -EINVAL; + + dev_dbg(&usb_ss->dev, "DRBL(%02X)\n", + usb_ss_ep->endpoint.desc->bEndpointAddress); + + usb_ss_ep->hw_pending_flag = 1; + trb_dma = request->dma; + + /* must allocate buffer aligned to 8 */ + if (request->dma % ADDR_MODULO_8) { + memcpy(usb_ss_ep->cpu_addr, request->buf, request->length); + trb_dma = usb_ss_ep->dma_addr; + } + + cdns_flush_cache((uintptr_t)trb_dma, request->length); + + trb = usb_ss_ep->trb_pool; + + /* fill TRB */ + trb->offset0 = trb_dma; + + trb->offset4 = TRB_SET_BURST_LENGTH(16) | + TRB_SET_TRANSFER_LENGTH(request->length); + + trb->offset8 = TRB_SET_CYCLE_BIT + | TRB_SET_INT_ON_COMPLETION + | TRB_SET_INT_ON_SHORT_PACKET + | TRB_TYPE_NORMAL; + + cdns_flush_cache((uintptr_t)trb, sizeof(struct usb_ss_trb)); + + /* arm transfer on selected endpoint */ + select_ep(usb_ss_ep->usb_ss, + usb_ss_ep->endpoint.desc->bEndpointAddress); + + cdns_writel(&usb_ss->regs->ep_traddr, + EP_TRADDR__TRADDR__WRITE(usb_ss_ep->trb_pool_dma)); + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__DRDY__MASK); /* DRDY */ + return 0; +} + +/** + * cdns_get_setup_ret - Returns status of handling setup packet + * Setup is handled by gadget driver + * @usb_ss: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns zero on success or negative value on failure + */ +static int cdns_get_setup_ret(struct usb_ss_dev *usb_ss, + struct usb_ctrlrequest *ctrl_req) +{ + int ret; + + spin_unlock(&usb_ss->lock); + usb_ss->setup_pending = 1; + ret = usb_ss->gadget_driver->setup(&usb_ss->gadget, ctrl_req); + usb_ss->setup_pending = 0; + spin_lock(&usb_ss->lock); + return ret; +} + +static void cdns_prepare_setup_packet(struct usb_ss_dev *usb_ss) +{ + usb_ss->ep0_data_dir = 0; + cdns_ep0_run_transfer(usb_ss, usb_ss->setup_dma, 8, 0); +} + +/** + * cdns_req_ep0_set_address - Handling of SET_ADDRESS standard USB request + * @usb_ss: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns_req_ep0_set_address(struct usb_ss_dev *usb_ss, + struct usb_ctrlrequest *ctrl_req) +{ + enum usb_device_state device_state = usb_ss->gadget.state; + u32 reg; + u32 addr; + + addr = le16_to_cpu(ctrl_req->wValue); + + if (addr > DEVICE_ADDRESS_MAX) { + dev_err(&usb_ss->dev, + "Device address (%d) cannot be greater than %d\n", + addr, DEVICE_ADDRESS_MAX); + return -EINVAL; + } + + if (device_state == USB_STATE_CONFIGURED) { + dev_err(&usb_ss->dev, "USB device already configured\n"); + return -EINVAL; + } + + reg = cdns_readl(&usb_ss->regs->usb_cmd); + + cdns_writel(&usb_ss->regs->usb_cmd, reg + | USB_CMD__FADDR__WRITE(addr) + | USB_CMD__SET_ADDR__MASK); + + usb_gadget_set_state(&usb_ss->gadget, + (addr ? USB_STATE_ADDRESS : USB_STATE_DEFAULT)); + + cdns_prepare_setup_packet(usb_ss); + + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__ERDY__MASK | EP_CMD__REQ_CMPL__MASK); + return 0; +} + +/** + * cdns_req_ep0_get_status - Handling of GET_STATUS standard USB request + * @usb_ss: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns_req_ep0_get_status(struct usb_ss_dev *usb_ss, + struct usb_ctrlrequest *ctrl_req) +{ + u16 usb_status = 0; + unsigned int length = 2; + u32 recip = ctrl_req->bRequestType & USB_RECIP_MASK; + u32 reg; + + switch (recip) { + case USB_RECIP_DEVICE: + reg = cdns_readl(&usb_ss->regs->usb_sts); + + if (reg & USB_STS__U1ENS__MASK) + usb_status |= 1uL << USB_DEV_STAT_U1_ENABLED; + + if (reg & USB_STS__U2ENS__MASK) + usb_status |= 1uL << USB_DEV_STAT_U2_ENABLED; + + if (usb_ss->wake_up_flag) + usb_status |= 1uL << USB_DEVICE_REMOTE_WAKEUP; + + /* self powered */ + usb_status |= 1uL << USB_DEVICE_SELF_POWERED; + break; + + case USB_RECIP_INTERFACE: + return cdns_get_setup_ret(usb_ss, ctrl_req); + + case USB_RECIP_ENDPOINT: + /* check if endpoint is stalled */ + select_ep(usb_ss, ctrl_req->wIndex); + if (cdns_readl(&usb_ss->regs->ep_sts) + & EP_STS__STALL__MASK) + usb_status = 1; + break; + + default: + return -EINVAL; + } + + *(u16 *)usb_ss->setup = cpu_to_le16(usb_status); + + usb_ss->actual_ep0_request = NULL; + cdns_ep0_run_transfer(usb_ss, usb_ss->setup_dma, length, 1); + return 0; +} + +/** + * cdns_req_ep0_handle_feature - + * Handling of GET/SET_FEATURE standard USB request + * + * @usb_ss: extended gadget object + * @ctrl_req: pointer to received setup packet + * @set: must be set to 1 for SET_FEATURE request + * + * Returns 0 if success, error code on error + */ +static int cdns_req_ep0_handle_feature(struct usb_ss_dev *usb_ss, + struct usb_ctrlrequest *ctrl_req, + int set) +{ + u32 recip = ctrl_req->bRequestType & USB_RECIP_MASK; + struct usb_ss_endpoint *usb_ss_ep; + u32 reg; + u8 tmode = 0; + + switch (recip) { + case USB_RECIP_DEVICE: + + switch (ctrl_req->wValue) { + case USB_DEVICE_U1_ENABLE: + if (usb_ss->gadget.state != USB_STATE_CONFIGURED) + return -EINVAL; + if (usb_ss->gadget.speed != USB_SPEED_SUPER) + return -EINVAL; + + reg = cdns_readl(&usb_ss->regs->usb_conf); + if (set) + /* set U1EN */ + reg |= USB_CONF__U1EN__MASK; + else + /* set U1 disable */ + reg |= USB_CONF__U1DS__MASK; + cdns_writel(&usb_ss->regs->usb_conf, reg); + break; + + case USB_DEVICE_U2_ENABLE: + if (usb_ss->gadget.state != USB_STATE_CONFIGURED) + return -EINVAL; + if (usb_ss->gadget.speed != USB_SPEED_SUPER) + return -EINVAL; + + reg = cdns_readl(&usb_ss->regs->usb_conf); + if (set) + /* set U2EN */ + reg |= USB_CONF__U2EN__MASK; + else + /* set U2 disable */ + reg |= USB_CONF__U2DS__MASK; + cdns_writel(&usb_ss->regs->usb_conf, reg); + break; + + case USB_DEVICE_A_ALT_HNP_SUPPORT: + break; + + case USB_DEVICE_A_HNP_SUPPORT: + break; + + case USB_DEVICE_B_HNP_ENABLE: + if (!usb_ss->gadget.b_hnp_enable && set) + usb_ss->gadget.b_hnp_enable = 1; + break; + + case USB_DEVICE_REMOTE_WAKEUP: + usb_ss->wake_up_flag = !!set; + break; + + case USB_DEVICE_TEST_MODE: + if (usb_ss->gadget.state != USB_STATE_CONFIGURED) + return -EINVAL; + if (usb_ss->gadget.speed != USB_SPEED_HIGH && + usb_ss->gadget.speed != USB_SPEED_FULL) + return -EINVAL; + if (ctrl_req->wLength != 0 || + ctrl_req->bRequestType & USB_DIR_IN) { + dev_err(&usb_ss->dev, "req is error\n"); + return -EINVAL; + } + tmode = le16_to_cpu(ctrl_req->wIndex) >> 8; + switch (tmode) { + case TEST_J: + case TEST_K: + case TEST_SE0_NAK: + case TEST_PACKET: + reg = cdns_readl(&usb_ss->regs->usb_cmd); + tmode -= 1; + reg |= USB_CMD__STMODE | + USB_CMD__TMODE_SEL(tmode); + cdns_writel(&usb_ss->regs->usb_cmd, reg); + dev_info(&usb_ss->dev, + "set test mode, val=0x%x", reg); + break; + default: + return -EINVAL; + } + break; + + default: + return -EINVAL; + } + break; + + case USB_RECIP_INTERFACE: + return cdns_get_setup_ret(usb_ss, ctrl_req); + + case USB_RECIP_ENDPOINT: + select_ep(usb_ss, ctrl_req->wIndex); + u8 ep_index = CAST_EP_ADDR_TO_INDEX(ctrl_req->wIndex); + + if (set) { + /* set stall */ + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__SSTALL__MASK); + + /* handle non zero endpoint software endpoint */ + if (ctrl_req->wIndex & 0x7F) { + usb_ss_ep = usb_ss->eps[ep_index]; + usb_ss_ep->stalled_flag = 1; + } + } else { + struct usb_request *request; + + if (ctrl_req->wIndex & 0x7F) { + if (usb_ss->eps[ep_index]->wedge_flag) + goto jmp_wedge; + } + + /* clear stall */ + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__CSTALL__MASK | + EP_CMD__EPRST__MASK); + /* wait for EPRST cleared */ + while (cdns_readl(&usb_ss->regs->ep_cmd) + & EP_CMD__EPRST__MASK) + ; + + /* handle non zero endpoint software endpoint */ + if (ctrl_req->wIndex & 0x7F) { + usb_ss_ep = usb_ss->eps[ep_index]; + usb_ss_ep->stalled_flag = 0; + + request = + next_request(&usb_ss_ep->request_list); + if (request) + cdns_ep_run_transfer(usb_ss_ep); + } + } +jmp_wedge: + select_ep(usb_ss, 0x00); + break; + + default: + return -EINVAL; + } + + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__ERDY__MASK | EP_CMD__REQ_CMPL__MASK); + + return 0; +} + +/** + * cdns_req_ep0_set_sel - Handling of SET_SEL standard USB request + * @usb_ss: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns_req_ep0_set_sel(struct usb_ss_dev *usb_ss, + struct usb_ctrlrequest *ctrl_req) +{ + if (usb_ss->gadget.state < USB_STATE_ADDRESS) + return -EINVAL; + + if (ctrl_req->wLength != 6) { + dev_err(&usb_ss->dev, "Set SEL should be 6 bytes, got %d\n", + ctrl_req->wLength); + return -EINVAL; + } + + usb_ss->ep0_data_dir = 0; + usb_ss->actual_ep0_request = NULL; + cdns_ep0_run_transfer(usb_ss, usb_ss->setup_dma, 6, 1); + + return 0; +} + +/** + * cdns_req_ep0_set_isoch_delay - + * Handling of GET_ISOCH_DELAY standard USB request + * @usb_ss: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns_req_ep0_set_isoch_delay(struct usb_ss_dev *usb_ss, + struct usb_ctrlrequest *ctrl_req) +{ + if (ctrl_req->wIndex || ctrl_req->wLength) + return -EINVAL; + + usb_ss->isoch_delay = ctrl_req->wValue; + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__ERDY__MASK | EP_CMD__REQ_CMPL__MASK); + return 0; +} + +/** + * cdns_req_ep0_set_configuration - Handling of SET_CONFIG standard USB request + * @usb_ss: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, 0x7FFF on deferred status stage, error code on error + */ +static int cdns_req_ep0_set_configuration(struct usb_ss_dev *usb_ss, + struct usb_ctrlrequest *ctrl_req) +{ + enum usb_device_state device_state = usb_ss->gadget.state; + u32 config = le16_to_cpu(ctrl_req->wValue); + struct usb_ep *ep; + struct usb_ss_endpoint *usb_ss_ep, *temp_ss_ep; + int i, result = 0; + + switch (device_state) { + case USB_STATE_ADDRESS: + /* Configure non-control EPs */ + list_for_each_entry_safe(usb_ss_ep, temp_ss_ep, + &usb_ss->ep_match_list, + ep_match_pending_list) { + cdns_ep_config(usb_ss_ep); + list_del(&usb_ss_ep->ep_match_pending_list); + } + + list_for_each_entry(ep, &usb_ss->gadget.ep_list, ep_list) { + usb_ss_ep = to_usb_ss_ep(ep); + if (usb_ss_ep->used) + cdns_ep_config(usb_ss_ep); + } + +#ifdef CDNS_THREADED_IRQ_HANDLING + usb_ss->ep_ien = cdns_readl(&usb_ss->regs->ep_ien) + | EP_IEN__EOUTEN0__MASK | EP_IEN__EINEN0__MASK; +#endif + result = cdns_get_setup_ret(usb_ss, ctrl_req); + + if (result != 0) + return result; + + if (config) { + if (!usb_ss->hw_configured_flag) { + /* SET CONFIGURATION */ + cdns_writel(&usb_ss->regs->usb_conf, + USB_CONF__CFGSET__MASK); + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__ERDY__MASK | + EP_CMD__REQ_CMPL__MASK); + /* wait until configuration set */ + while (!(cdns_readl(&usb_ss->regs->usb_sts) + & USB_STS__CFGSTS__MASK)) + ; + usb_ss->hw_configured_flag = 1; + + list_for_each_entry(ep, &usb_ss->gadget.ep_list, + ep_list) { + usb_ss_ep = to_usb_ss_ep(ep); + if (usb_ss_ep->enabled) + cdns_ep_run_transfer(usb_ss_ep); + } + } + + usb_gadget_set_state(&usb_ss->gadget, + USB_STATE_CONFIGURED); + + } else { + cdns_gadget_unconfig(usb_ss); + for (i = 0; i < usb_ss->ep_nums; i++) + usb_ss->eps[i]->enabled = 0; + usb_gadget_set_state(&usb_ss->gadget, + USB_STATE_ADDRESS); + } + break; + + case USB_STATE_CONFIGURED: + result = cdns_get_setup_ret(usb_ss, ctrl_req); + if (!config && !result) { + cdns_gadget_unconfig(usb_ss); + for (i = 0; i < usb_ss->ep_nums; i++) + usb_ss->eps[i]->enabled = 0; + usb_gadget_set_state(&usb_ss->gadget, + USB_STATE_ADDRESS); + } + break; + + default: + result = -EINVAL; + } + + return result; +} + +/** + * cdns_ep0_standard_request - Handling standard USB requests + * @usb_ss: extended gadget object + * @ctrl_req: pointer to received setup packet + * + * Returns 0 if success, error code on error + */ +static int cdns_ep0_standard_request(struct usb_ss_dev *usb_ss, + struct usb_ctrlrequest *ctrl_req) +{ + switch (ctrl_req->bRequest) { + case USB_REQ_SET_ADDRESS: + return cdns_req_ep0_set_address(usb_ss, ctrl_req); + case USB_REQ_SET_CONFIGURATION: + return cdns_req_ep0_set_configuration(usb_ss, ctrl_req); + case USB_REQ_GET_STATUS: + return cdns_req_ep0_get_status(usb_ss, ctrl_req); + case USB_REQ_CLEAR_FEATURE: + return cdns_req_ep0_handle_feature(usb_ss, ctrl_req, 0); + case USB_REQ_SET_FEATURE: + return cdns_req_ep0_handle_feature(usb_ss, ctrl_req, 1); + case USB_REQ_SET_SEL: + return cdns_req_ep0_set_sel(usb_ss, ctrl_req); + case USB_REQ_SET_ISOCH_DELAY: + return cdns_req_ep0_set_isoch_delay(usb_ss, ctrl_req); + default: + return cdns_get_setup_ret(usb_ss, ctrl_req); + } +} + +/** + * cdns_ep0_setup_phase - Handling setup USB requests + * @usb_ss: extended gadget object + */ +static void cdns_ep0_setup_phase(struct usb_ss_dev *usb_ss) +{ + int result; + struct usb_ctrlrequest *ctrl_req = + (struct usb_ctrlrequest *)usb_ss->setup; + + if ((ctrl_req->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) + result = cdns_ep0_standard_request(usb_ss, ctrl_req); + else + result = cdns_get_setup_ret(usb_ss, ctrl_req); + + if (result != 0 && result != USB_GADGET_DELAYED_STATUS) { + dev_dbg(&usb_ss->dev, "STALL(00) %d\n", result); + + /* set_stall on ep0 */ + select_ep(usb_ss, 0x00); + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__SSTALL__MASK); + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__ERDY__MASK | EP_CMD__REQ_CMPL__MASK); + return; + } +} + +/** + * cdns_check_ep_interrupt_proceed - Processes interrupt related to endpoint + * @usb_ss_ep: extended endpoint object + * + * Returns 0 + */ +static int cdns_check_ep_interrupt_proceed(struct usb_ss_endpoint *usb_ss_ep) +{ + struct usb_ss_dev *usb_ss = usb_ss_ep->usb_ss; + struct usb_request *request; + u32 ep_sts_reg; + + select_ep(usb_ss, usb_ss_ep->address); + ep_sts_reg = cdns_readl(&usb_ss->regs->ep_sts); + + dev_dbg(&usb_ss->dev, "EP_STS: %08X\n", ep_sts_reg); + + if (ep_sts_reg & EP_STS__TRBERR__MASK) { + cdns_writel(&usb_ss->regs->ep_sts, EP_STS__TRBERR__MASK); + + dev_dbg(&usb_ss->dev, "TRBERR(%02X)\n", + usb_ss_ep->endpoint.desc->bEndpointAddress); + } + + if (ep_sts_reg & EP_STS__ISOERR__MASK) { + cdns_writel(&usb_ss->regs->ep_sts, EP_STS__ISOERR__MASK); + dev_dbg(&usb_ss->dev, "ISOERR(%02X)\n", + usb_ss_ep->endpoint.desc->bEndpointAddress); + } + + if (ep_sts_reg & EP_STS__OUTSMM__MASK) { + cdns_writel(&usb_ss->regs->ep_sts, EP_STS__OUTSMM__MASK); + dev_dbg(&usb_ss->dev, "OUTSMM(%02X)\n", + usb_ss_ep->endpoint.desc->bEndpointAddress); + } + + if (ep_sts_reg & EP_STS__NRDY__MASK) { + cdns_writel(&usb_ss->regs->ep_sts, EP_STS__NRDY__MASK); + dev_dbg(&usb_ss->dev, "NRDY(%02X)\n", + usb_ss_ep->endpoint.desc->bEndpointAddress); + } + + if ((ep_sts_reg & EP_STS__IOC__MASK) || + (ep_sts_reg & EP_STS__ISP__MASK)) { + u8 ep_dir; + + cdns_flush_cache((uintptr_t)usb_ss_ep->trb_pool, + sizeof(struct usb_ss_trb)); + + cdns_writel(&usb_ss->regs->ep_sts, + EP_STS__IOC__MASK | EP_STS__ISP__MASK); + + /* get just completed request */ + request = next_request(&usb_ss_ep->request_list); + ep_dir = usb_ss_ep->endpoint.desc->bEndpointAddress; + usb_gadget_unmap_request(&usb_ss->gadget, request, + ep_dir & ENDPOINT_DIR_MASK); + + request->status = 0; + request->actual = + le32_to_cpu(((u32 *)usb_ss_ep->trb_pool)[1]) + & ACTUAL_TRANSFERRED_BYTES_MASK; + + dev_dbg(&usb_ss->dev, "IOC(%02X) %d\n", + usb_ss_ep->endpoint.desc->bEndpointAddress, + request->actual); + + list_del(&request->list); + + usb_ss_ep->hw_pending_flag = 0; + if (request->complete) { + spin_unlock(&usb_ss->lock); + usb_gadget_giveback_request(&usb_ss_ep->endpoint, + request); + spin_lock(&usb_ss->lock); + } + + /* handle deferred STALL */ + if (usb_ss_ep->stalled_flag) { + cdns_ep_stall_flush(usb_ss_ep); + return 0; + } + + /* exit if hardware transfer already started */ + if (usb_ss_ep->hw_pending_flag) + return 0; + + /* if any request queued run it! */ + if (!list_empty(&usb_ss_ep->request_list)) + cdns_ep_run_transfer(usb_ss_ep); + } + + if (ep_sts_reg & EP_STS__DESCMIS__MASK) { + cdns_writel(&usb_ss->regs->ep_sts, EP_STS__DESCMIS__MASK); + dev_dbg(&usb_ss->dev, "DESCMIS(%02X)\n", + usb_ss_ep->endpoint.desc->bEndpointAddress); + } + + return 0; +} + +/** + * cdns_check_ep0_interrupt_proceed - Processes interrupt related to endpoint 0 + * @usb_ss: extended gadget object + * @dir: 1 for IN direction, 0 for OUT direction + */ +static void cdns_check_ep0_interrupt_proceed(struct usb_ss_dev *usb_ss, int dir) +{ + u32 ep_sts_reg; + int i; + + select_ep(usb_ss, 0 | (dir ? USB_DIR_IN : USB_DIR_OUT)); + ep_sts_reg = cdns_readl(&usb_ss->regs->ep_sts); + + dev_dbg(&usb_ss->dev, "EP_STS: %08X\n", ep_sts_reg); + + if ((ep_sts_reg & EP_STS__SETUP__MASK) && dir == 0) { + cdns_flush_cache((uintptr_t)usb_ss->setup, 8); + + dev_dbg(&usb_ss->dev, "SETUP(%02X)\n", 0x00); + + cdns_writel(&usb_ss->regs->ep_sts, + EP_STS__SETUP__MASK | + EP_STS__IOC__MASK | EP_STS__ISP__MASK); + + dev_dbg(&usb_ss->dev, "SETUP: "); + for (i = 0; i < 8; i++) + dev_dbg(&usb_ss->dev, "%02X ", usb_ss->setup[i]); + dev_dbg(&usb_ss->dev, "\nSTATE: %d\n", usb_ss->gadget.state); + usb_ss->ep0_data_dir = usb_ss->setup[0] & USB_DIR_IN; + cdns_ep0_setup_phase(usb_ss); + ep_sts_reg &= ~(EP_STS__SETUP__MASK | + EP_STS__IOC__MASK | + EP_STS__ISP__MASK); + } + + if (ep_sts_reg & EP_STS__TRBERR__MASK) { + cdns_writel(&usb_ss->regs->ep_sts, EP_STS__TRBERR__MASK); + dev_dbg(&usb_ss->dev, "TRBERR(%02X)\n", + dir ? USB_DIR_IN : USB_DIR_OUT); + } + + if (ep_sts_reg & EP_STS__DESCMIS__MASK) { + cdns_writel(&usb_ss->regs->ep_sts, EP_STS__DESCMIS__MASK); + + dev_dbg(&usb_ss->dev, "DESCMIS(%02X)\n", + dir ? USB_DIR_IN : USB_DIR_OUT); + + if (dir == 0 && !usb_ss->setup_pending) { + usb_ss->ep0_data_dir = 0; + cdns_ep0_run_transfer(usb_ss, + usb_ss->setup_dma, 8, 0); + } + } + + if ((ep_sts_reg & EP_STS__IOC__MASK) || + (ep_sts_reg & EP_STS__ISP__MASK)) { + cdns_flush_cache((uintptr_t)usb_ss->trb_ep0, 20); + + cdns_writel(&usb_ss->regs->ep_sts, EP_STS__IOC__MASK); + if (usb_ss->actual_ep0_request) { + usb_gadget_unmap_request(&usb_ss->gadget, + usb_ss->actual_ep0_request, + usb_ss->ep0_data_dir); + + usb_ss->actual_ep0_request->actual = + le32_to_cpu((usb_ss->trb_ep0)[1]) + & ACTUAL_TRANSFERRED_BYTES_MASK; + + dev_dbg(&usb_ss->dev, "IOC(%02X) %d\n", + dir ? USB_DIR_IN : USB_DIR_OUT, + usb_ss->actual_ep0_request->actual); + list_del_init(&usb_ss->actual_ep0_request->list); + } + + if (usb_ss->actual_ep0_request && + usb_ss->actual_ep0_request->complete) { + spin_unlock(&usb_ss->lock); + usb_ss->actual_ep0_request->complete(usb_ss->gadget.ep0, + usb_ss->actual_ep0_request); + spin_lock(&usb_ss->lock); + } + cdns_prepare_setup_packet(usb_ss); + cdns_writel(&usb_ss->regs->ep_cmd, EP_CMD__REQ_CMPL__MASK); + } +} + +/** + * cdns_check_usb_interrupt_proceed - Processes interrupt related to device + * @usb_ss: extended gadget object + * @usb_ists: bitmap representation of device's reported interrupts + * (usb_ists register value) + */ +static void cdns_check_usb_interrupt_proceed(struct usb_ss_dev *usb_ss, + u32 usb_ists) +{ + int interrupt_bit = ffs(usb_ists) - 1; + int speed; + u32 val; + + dev_dbg(&usb_ss->dev, "USB interrupt detected\n"); + + switch (interrupt_bit) { + case USB_ISTS__CON2I__SHIFT: + /* FS/HS Connection detected */ + dev_dbg(&usb_ss->dev, + "[Interrupt] FS/HS Connection detected\n"); + val = cdns_readl(&usb_ss->regs->usb_sts); + speed = USB_STS__USBSPEED__READ(val); + if (speed == USB_SPEED_WIRELESS) + speed = USB_SPEED_SUPER; + dev_dbg(&usb_ss->dev, "Speed value: %s (%d), usbsts:0x%x\n", + usb_speed_string(speed), speed, val); + usb_ss->gadget.speed = speed; + usb_ss->is_connected = 1; + usb_gadget_set_state(&usb_ss->gadget, USB_STATE_POWERED); + cdns_ep0_config(usb_ss); + break; + + case USB_ISTS__CONI__SHIFT: + /* SS Connection detected */ + dev_dbg(&usb_ss->dev, "[Interrupt] SS Connection detected\n"); + val = cdns_readl(&usb_ss->regs->usb_sts); + speed = USB_STS__USBSPEED__READ(val); + if (speed == USB_SPEED_WIRELESS) + speed = USB_SPEED_SUPER; + dev_dbg(&usb_ss->dev, "Speed value: %s (%d), usbsts:0x%x\n", + usb_speed_string(speed), speed, val); + usb_ss->gadget.speed = speed; + usb_ss->is_connected = 1; + usb_gadget_set_state(&usb_ss->gadget, USB_STATE_POWERED); + cdns_ep0_config(usb_ss); + break; + + case USB_ISTS__DIS2I__SHIFT: + case USB_ISTS__DISI__SHIFT: + /* SS Disconnection detected */ + val = cdns_readl(&usb_ss->regs->usb_sts); + dev_dbg(&usb_ss->dev, + "[Interrupt] Disconnection detected: usbsts:0x%x\n", + val); + if (usb_ss->gadget_driver && + usb_ss->gadget_driver->disconnect) { + spin_unlock(&usb_ss->lock); + usb_ss->gadget_driver->disconnect(&usb_ss->gadget); + spin_lock(&usb_ss->lock); + } + usb_ss->gadget.speed = USB_SPEED_UNKNOWN; + usb_gadget_set_state(&usb_ss->gadget, USB_STATE_NOTATTACHED); + usb_ss->is_connected = 0; + cdns_gadget_unconfig(usb_ss); + break; + + case USB_ISTS__L2ENTI__SHIFT: + dev_dbg(&usb_ss->dev, + "[Interrupt] Device suspended\n"); + break; + + case USB_ISTS__L2EXTI__SHIFT: + dev_dbg(&usb_ss->dev, "[Interrupt] L2 exit detected\n"); + /* + * Exit from standby mode + * on L2 exit (Suspend in HS/FS or SS) + */ + break; + case USB_ISTS__U3EXTI__SHIFT: + /* + * Exit from standby mode + * on U3 exit (Suspend in HS/FS or SS) + */ + dev_dbg(&usb_ss->dev, "[Interrupt] U3 exit detected\n"); + break; + + /* resets cases */ + case USB_ISTS__UWRESI__SHIFT: + case USB_ISTS__UHRESI__SHIFT: + case USB_ISTS__U2RESI__SHIFT: + dev_dbg(&usb_ss->dev, "[Interrupt] Reset detected\n"); + val = cdns_readl(&usb_ss->regs->usb_sts); + speed = USB_STS__USBSPEED__READ(val); + if (speed == USB_SPEED_WIRELESS) + speed = USB_SPEED_SUPER; + usb_gadget_set_state(&usb_ss->gadget, USB_STATE_DEFAULT); + usb_ss->gadget.speed = speed; + cdns_gadget_unconfig(usb_ss); + cdns_ep0_config(usb_ss); + break; + default: + break; + } + + /* Clear interrupt bit */ + cdns_writel(&usb_ss->regs->usb_ists, (1uL << interrupt_bit)); +} + +#ifdef CDNS_THREADED_IRQ_HANDLING +static irqreturn_t cdns_irq_handler(int irq, void *_usb_ss) +{ + struct usb_ss_dev *usb_ss = _usb_ss; + + usb_ss->usb_ien = cdns_readl(&usb_ss->regs->usb_ien); + usb_ss->ep_ien = cdns_readl(&usb_ss->regs->ep_ien); + + if (!cdns_readl(&usb_ss->regs->usb_ists) && + !cdns_readl(&usb_ss->regs->ep_ists)) { + dev_dbg(&usb_ss->dev, "--BUBBLE INTERRUPT 0 !!!\n"); + if (cdns_readl(&usb_ss->regs->usb_sts) & + USB_STS__CFGSTS__MASK) + return IRQ_HANDLED; + return IRQ_NONE; + } + + cdns_writel(&usb_ss->regs->usb_ien, 0); + cdns_writel(&usb_ss->regs->ep_ien, 0); + + cdns_readl(&usb_ss->regs->dma_axi_ctrl); + return IRQ_WAKE_THREAD; +} +#endif + +/** + * cdns_irq_handler - irq line interrupt handler + * @cdns: cdns3 instance + * + * Returns IRQ_HANDLED when interrupt raised by USBSS_DEV, + * IRQ_NONE when interrupt raised by other device connected + * to the irq line + */ +static int cdns_irq_handler_thread(struct cdns3 *cdns) +{ + struct usb_ss_dev *usb_ss = + container_of(cdns->gadget_dev, struct usb_ss_dev, dev); + u32 reg; + int ret = IRQ_NONE; + unsigned long flags; + + spin_lock_irqsave(&usb_ss->lock, flags); + + /* check USB device interrupt */ + reg = cdns_readl(&usb_ss->regs->usb_ists); + if (reg) { + dev_dbg(&usb_ss->dev, "usb_ists: %08X\n", reg); + cdns_check_usb_interrupt_proceed(usb_ss, reg); + ret = IRQ_HANDLED; + } + + /* check endpoint interrupt */ + reg = cdns_readl(&usb_ss->regs->ep_ists); + if (reg != 0) { + dev_dbg(&usb_ss->dev, "ep_ists: %08X\n", reg); + } else { + if (cdns_readl(&usb_ss->regs->usb_sts) & + USB_STS__CFGSTS__MASK) + ret = IRQ_HANDLED; + goto irqend; + } + + /* handle default endpoint OUT */ + if (reg & EP_ISTS__EOUT0__MASK) { + cdns_check_ep0_interrupt_proceed(usb_ss, 0); + ret = IRQ_HANDLED; + } + + /* handle default endpoint IN */ + if (reg & EP_ISTS__EIN0__MASK) { + cdns_check_ep0_interrupt_proceed(usb_ss, 1); + ret = IRQ_HANDLED; + } + + /* check if interrupt from non default endpoint, if no exit */ + reg &= ~(EP_ISTS__EOUT0__MASK | EP_ISTS__EIN0__MASK); + if (!reg) + goto irqend; + + do { + unsigned int bit_pos = ffs(reg); + u32 bit_mask = 1 << (bit_pos - 1); + u8 ep_index = CAST_EP_REG_POS_TO_INDEX(bit_pos); + + dev_dbg(&usb_ss->dev, "Interrupt on index: %d bitmask %08X\n", + ep_index, bit_mask); + cdns_check_ep_interrupt_proceed(usb_ss->eps[ep_index]); + reg &= ~bit_mask; + ret = IRQ_HANDLED; + } while (reg); + +irqend: + + spin_unlock_irqrestore(&usb_ss->lock, flags); +#ifdef CDNS_THREADED_IRQ_HANDLING + local_irq_save(flags); + cdns_writel(&usb_ss->regs->usb_ien, usb_ss->usb_ien); + cdns_writel(&usb_ss->regs->ep_ien, usb_ss->ep_ien); + local_irq_restore(flags); +#endif + return ret; +} + +/** + * usb_ss_gadget_ep0_enable + * Function shouldn't be called by gadget driver, + * endpoint 0 is allways active + */ +static int usb_ss_gadget_ep0_enable(struct usb_ep *ep, + const struct usb_endpoint_descriptor *desc) +{ + return -EINVAL; +} + +/** + * usb_ss_gadget_ep0_disable + * Function shouldn't be called by gadget driver, + * endpoint 0 is allways active + */ +static int usb_ss_gadget_ep0_disable(struct usb_ep *ep) +{ + return -EINVAL; +} + +/** + * usb_ss_gadget_ep0_set_halt + * @ep: pointer to endpoint zero object + * @value: 1 for set stall, 0 for clear stall + * + * Returns 0 + */ +static int usb_ss_gadget_ep0_set_halt(struct usb_ep *ep, int value) +{ + /* TODO */ + return 0; +} + +/** + * usb_ss_gadget_ep0_queue Transfer data on endpoint zero + * @ep: pointer to endpoint zero object + * @request: pointer to request object + * @gfp_flags: gfp flags + * + * Returns 0 on success, error code elsewhere + */ +static int usb_ss_gadget_ep0_queue(struct usb_ep *ep, + struct usb_request *request, + gfp_t gfp_flags) +{ + int ret; + unsigned long flags; + int erdy_sent = 0; + /* get extended endpoint */ + struct usb_ss_endpoint *usb_ss_ep = + to_usb_ss_ep(ep); + struct usb_ss_dev *usb_ss = usb_ss_ep->usb_ss; + + dev_dbg(&usb_ss->dev, "QUEUE(%02X) %d\n", + usb_ss->ep0_data_dir ? USB_DIR_IN : USB_DIR_OUT, + request->length); + + /* send STATUS stage */ + if (request->length == 0 && request->zero == 0) { + spin_lock_irqsave(&usb_ss->lock, flags); + select_ep(usb_ss, 0x00); + if (!usb_ss->hw_configured_flag) { + cdns_writel(&usb_ss->regs->usb_conf, + USB_CONF__CFGSET__MASK); + /* SET CONFIGURATION */ + cdns_prepare_setup_packet(usb_ss); + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__ERDY__MASK + | EP_CMD__REQ_CMPL__MASK); + /* wait until configuration set */ + while (!(cdns_readl(&usb_ss->regs->usb_sts) + & USB_STS__CFGSTS__MASK)) + ; + erdy_sent = 1; + usb_ss->hw_configured_flag = 1; + + list_for_each_entry(ep, &usb_ss->gadget.ep_list, + ep_list) { + if (to_usb_ss_ep(ep)->enabled) + cdns_ep_run_transfer(to_usb_ss_ep(ep)); + } + } + if (!erdy_sent) + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__ERDY__MASK + | EP_CMD__REQ_CMPL__MASK); + if (request->complete) + request->complete(usb_ss->gadget.ep0, request); + spin_unlock_irqrestore(&usb_ss->lock, flags); + return 0; + } + + spin_lock_irqsave(&usb_ss->lock, flags); + ret = usb_gadget_map_request(&usb_ss->gadget, request, + usb_ss->ep0_data_dir); + if (ret) { + dev_err(&usb_ss->dev, "failed to map request\n"); + return -EINVAL; + } + + usb_ss->actual_ep0_request = request; + cdns_ep0_run_transfer(usb_ss, request->dma, request->length, 1); + list_add_tail(&request->list, &usb_ss_ep->request_list); + spin_unlock_irqrestore(&usb_ss->lock, flags); + + return 0; +} + +/** + * cdns_ep_config Configure hardware endpoint + * @usb_ss_ep: extended endpoint object + */ +static void cdns_ep_config(struct usb_ss_endpoint *usb_ss_ep) +{ + struct usb_ss_dev *usb_ss = usb_ss_ep->usb_ss; + u32 ep_cfg = 0; + u32 max_packet_size = 0; + u32 bEndpointAddress = usb_ss_ep->num | usb_ss_ep->dir; + u32 interrupt_mask = 0; + bool is_iso_ep = (usb_ss_ep->type == USB_ENDPOINT_XFER_ISOC); + + dev_dbg(&usb_ss->dev, + "%s: %s addr=0x%x, speed %d, is_iso_ep %d\n", __func__, + usb_ss_ep->name, bEndpointAddress, usb_ss->gadget.speed, + is_iso_ep); + + if (is_iso_ep) { + ep_cfg = EP_CFG__EPTYPE__WRITE(USB_ENDPOINT_XFER_ISOC); + interrupt_mask = INTERRUPT_MASK; + } else { + ep_cfg = EP_CFG__EPTYPE__WRITE(USB_ENDPOINT_XFER_BULK); + } + + switch (usb_ss->gadget.speed) { + case USB_SPEED_UNKNOWN: + max_packet_size = ENDPOINT_MAX_PACKET_SIZE_0; + break; + + case USB_SPEED_LOW: + max_packet_size = ENDPOINT_MAX_PACKET_SIZE_8; + break; + + case USB_SPEED_FULL: + max_packet_size = (is_iso_ep ? + ENDPOINT_MAX_PACKET_SIZE_1023 : + ENDPOINT_MAX_PACKET_SIZE_64); + break; + + case USB_SPEED_HIGH: + max_packet_size = (is_iso_ep ? + ENDPOINT_MAX_PACKET_SIZE_1024 : + ENDPOINT_MAX_PACKET_SIZE_512); + break; + + case USB_SPEED_WIRELESS: + max_packet_size = ENDPOINT_MAX_PACKET_SIZE_512; + break; + + case USB_SPEED_SUPER: + max_packet_size = ENDPOINT_MAX_PACKET_SIZE_1024; + break; + } + + ep_cfg |= EP_CFG__MAXPKTSIZE__WRITE(max_packet_size); + + if (is_iso_ep) { + ep_cfg |= EP_CFG__BUFFERING__WRITE(1); + ep_cfg |= EP_CFG__MAXBURST__WRITE(0); + } else { + ep_cfg |= EP_CFG__BUFFERING__WRITE(3); + ep_cfg |= EP_CFG__MAXBURST__WRITE(15); + } + + select_ep(usb_ss, bEndpointAddress); + cdns_writel(&usb_ss->regs->ep_cfg, ep_cfg); + cdns_writel(&usb_ss->regs->ep_sts_en, + EP_STS_EN__TRBERREN__MASK | interrupt_mask); + + /* enable interrupt for selected endpoint */ + ep_cfg = cdns_readl(&usb_ss->regs->ep_ien); + ep_cfg |= CAST_EP_ADDR_TO_BIT_POS(bEndpointAddress); + cdns_writel(&usb_ss->regs->ep_ien, ep_cfg); +} + +/** + * usb_ss_gadget_ep_enable Enable endpoint + * @ep: endpoint object + * @desc: endpoint descriptor + * + * Returns 0 on success, error code elsewhere + */ +static int usb_ss_gadget_ep_enable(struct usb_ep *ep, + const struct usb_endpoint_descriptor *desc) +{ + struct usb_ss_endpoint *usb_ss_ep; + struct usb_ss_dev *usb_ss; + unsigned long flags; + unsigned long *dma_addr; + int ret; + u32 ep_cfg; + + usb_ss_ep = to_usb_ss_ep(ep); + usb_ss = usb_ss_ep->usb_ss; + + if (!ep || !desc || desc->bDescriptorType != USB_DT_ENDPOINT) { + dev_err(&usb_ss->dev, "usb-ss: invalid parameters\n"); + return -EINVAL; + } + + if (!desc->wMaxPacketSize) { + dev_err(&usb_ss->dev, "usb-ss: missing wMaxPacketSize\n"); + return -EINVAL; + } + + ret = usb_ss_allocate_trb_pool(usb_ss_ep); + if (ret) + return ret; + + if (!usb_ss_ep->cpu_addr) { + dma_addr = (unsigned long *)&usb_ss_ep->dma_addr; + usb_ss_ep->cpu_addr = dma_alloc_coherent(4096, dma_addr); + + if (!usb_ss_ep->cpu_addr) + return -ENOMEM; + } + + dev_dbg(&usb_ss->dev, "Enabling endpoint: %s, addr=0x%x\n", + ep->name, desc->bEndpointAddress); + spin_lock_irqsave(&usb_ss->lock, flags); + select_ep(usb_ss, desc->bEndpointAddress); + ep_cfg = cdns_readl(&usb_ss->regs->ep_cfg); + ep_cfg |= EP_CFG__ENABLE__MASK; + cdns_writel(&usb_ss->regs->ep_cfg, ep_cfg); + + usb_ss_ep->enabled = 1; + ep->desc = desc; + usb_ss_ep->hw_pending_flag = 0; + spin_unlock_irqrestore(&usb_ss->lock, flags); + + return 0; +} + +static int usb_ss_gadget_match_ep(struct usb_gadget *gadget, + struct usb_ep *ep, + struct usb_endpoint_descriptor *desc) +{ + struct usb_ss_dev __maybe_unused *usb_ss = gadget_to_usb_ss(gadget); + struct usb_ss_endpoint *usb_ss_ep; + unsigned long flags; + + usb_ss_ep = to_usb_ss_ep(ep); + + dev_dbg(&usb_ss->dev, "match endpoint: %s\n", usb_ss_ep->name); + + u8 num = simple_strtoul(&ep->name[2], NULL, 10); + + spin_lock_irqsave(&usb_ss->lock, flags); + usb_ss_ep->num = num; + usb_ss_ep->used = true; + usb_ss_ep->endpoint.desc = desc; + usb_ss_ep->dir = usb_endpoint_dir_in(desc) ? USB_DIR_IN : USB_DIR_OUT; + usb_ss_ep->type = usb_endpoint_type(desc); + usb_ss_ep->address = desc->bEndpointAddress; + spin_unlock_irqrestore(&usb_ss->lock, flags); + + return 1; +} + +static void usb_ss_free_trb_pool(struct usb_ss_endpoint *usb_ss_ep) +{ + if (usb_ss_ep->trb_pool) { + dma_free_coherent(usb_ss_ep->trb_pool); + usb_ss_ep->trb_pool = NULL; + } + + if (usb_ss_ep->cpu_addr) { + dma_free_coherent(usb_ss_ep->cpu_addr); + usb_ss_ep->cpu_addr = NULL; + } +} + +/** + * usb_ss_gadget_ep_disable Disable endpoint + * @ep: endpoint object + * + * Returns 0 on success, error code elsewhere + */ +static int usb_ss_gadget_ep_disable(struct usb_ep *ep) +{ + struct usb_ss_endpoint *usb_ss_ep; + struct usb_ss_dev *usb_ss; + unsigned long flags; + int ret = 0; + struct usb_request *request; + u32 ep_cfg; + + if (!ep) { + pr_debug("usb-ss: invalid parameters\n"); + return -EINVAL; + } + + usb_ss_ep = to_usb_ss_ep(ep); + usb_ss = usb_ss_ep->usb_ss; + + spin_lock_irqsave(&usb_ss->lock, flags); + if (!usb_ss->start_gadget) { + dev_dbg(&usb_ss->dev, + "Disabling endpoint at disconnection: %s\n", ep->name); + spin_unlock_irqrestore(&usb_ss->lock, flags); + return 0; + } + + dev_dbg(&usb_ss->dev, + "Disabling endpoint: %s\n", ep->name); + + while (!list_empty(&usb_ss_ep->request_list)) { + request = next_request(&usb_ss_ep->request_list); + usb_gadget_unmap_request(&usb_ss->gadget, request, + ep->desc->bEndpointAddress & + USB_DIR_IN); + request->status = -ESHUTDOWN; + list_del(&request->list); + spin_unlock(&usb_ss->lock); + usb_gadget_giveback_request(ep, request); + spin_lock(&usb_ss->lock); + } + + select_ep(usb_ss, ep->desc->bEndpointAddress); + ep_cfg = cdns_readl(&usb_ss->regs->ep_cfg); + ep_cfg &= ~EP_CFG__ENABLE__MASK; + cdns_writel(&usb_ss->regs->ep_cfg, ep_cfg); + ep->desc = NULL; + usb_ss_ep->enabled = 0; + + spin_unlock_irqrestore(&usb_ss->lock, flags); + + return ret; +} + +/** + * usb_ss_gadget_ep_alloc_request Allocates request + * @ep: endpoint object associated with request + * @gfp_flags: gfp flags + * + * Returns allocated request address, NULL on allocation error + */ +static struct usb_request *usb_ss_gadget_ep_alloc_request(struct usb_ep *ep, + gfp_t gfp_flags) +{ + struct usb_request *request; + + request = kzalloc(sizeof(*request), gfp_flags); + if (!request) + return NULL; + + return request; +} + +/** + * usb_ss_gadget_ep_free_request Free memory occupied by request + * @ep: endpoint object associated with request + * @request: request to free memory + */ +static void usb_ss_gadget_ep_free_request(struct usb_ep *ep, + struct usb_request *request) +{ + kfree(request); +} + +/** + * usb_ss_gadget_ep_queue Transfer data on endpoint + * @ep: endpoint object + * @request: request object + * @gfp_flags: gfp flags + * + * Returns 0 on success, error code elsewhere + */ +static int usb_ss_gadget_ep_queue(struct usb_ep *ep, + struct usb_request *request, gfp_t gfp_flags) +{ + struct usb_ss_endpoint *usb_ss_ep = + to_usb_ss_ep(ep); + struct usb_ss_dev *usb_ss = usb_ss_ep->usb_ss; + unsigned long flags; + int ret = 0; + int empty_list = 0; + + spin_lock_irqsave(&usb_ss->lock, flags); + + request->actual = 0; + request->status = -EINPROGRESS; + + dev_dbg(&usb_ss->dev, + "Queuing endpoint: %s\n", usb_ss_ep->name); + + dev_dbg(&usb_ss->dev, "QUEUE(%02X) %d\n", + ep->desc->bEndpointAddress, request->length); + + ret = usb_gadget_map_request(&usb_ss->gadget, request, + ep->desc->bEndpointAddress & USB_DIR_IN); + + if (ret) { + spin_unlock_irqrestore(&usb_ss->lock, flags); + return ret; + } + + empty_list = list_empty(&usb_ss_ep->request_list); + list_add_tail(&request->list, &usb_ss_ep->request_list); + + if (!usb_ss->hw_configured_flag) { + spin_unlock_irqrestore(&usb_ss->lock, flags); + return 0; + } + + if (empty_list) { + if (!usb_ss_ep->stalled_flag) + cdns_ep_run_transfer(usb_ss_ep); + } + spin_unlock_irqrestore(&usb_ss->lock, flags); + + return ret; +} + +/** + * usb_ss_gadget_ep_dequeue Remove request from transfer queue + * @ep: endpoint object associated with request + * @request: request object + * + * Returns 0 on success, error code elsewhere + */ +static int usb_ss_gadget_ep_dequeue(struct usb_ep *ep, + struct usb_request *request) +{ + struct usb_ss_endpoint *usb_ss_ep = + to_usb_ss_ep(ep); + struct usb_ss_dev *usb_ss = usb_ss_ep->usb_ss; + struct usb_request *req, *req_temp; + unsigned long flags; + + spin_lock_irqsave(&usb_ss->lock, flags); + if (!usb_ss->start_gadget) { + dev_dbg(&usb_ss->dev, + "DEQUEUE at disconnection: %s\n", ep->name); + spin_unlock_irqrestore(&usb_ss->lock, flags); + return 0; + } + dev_dbg(&usb_ss->dev, "DEQUEUE(%02X) %d\n", + usb_ss_ep->address, request->length); + + list_for_each_entry_safe(req, req_temp, + &usb_ss_ep->request_list, list) { + if (request == req) { + request->status = -ECONNRESET; + usb_gadget_unmap_request(&usb_ss->gadget, request, + usb_ss_ep->address & + USB_DIR_IN); + list_del_init(&request->list); + if (request->complete) { + spin_unlock(&usb_ss->lock); + usb_gadget_giveback_request + (&usb_ss_ep->endpoint, request); + spin_lock(&usb_ss->lock); + } + break; + } + } + + spin_unlock_irqrestore(&usb_ss->lock, flags); + return 0; +} + +/** + * usb_ss_gadget_ep_set_halt Sets/clears stall on selected endpoint + * @ep: endpoint object to set/clear stall on + * @value: 1 for set stall, 0 for clear stall + * + * Returns 0 on success, error code elsewhere + */ +static int usb_ss_gadget_ep_set_halt(struct usb_ep *ep, int value) +{ + struct usb_ss_endpoint *usb_ss_ep = + to_usb_ss_ep(ep); + struct usb_ss_dev *usb_ss = usb_ss_ep->usb_ss; + unsigned long flags; + + /* return error when endpoint disabled */ + if (!usb_ss_ep->enabled) + return -EPERM; + + /* if actual transfer is pending defer setting stall on this endpoint */ + if (usb_ss_ep->hw_pending_flag && value) { + usb_ss_ep->stalled_flag = 1; + return 0; + } + + dev_dbg(&usb_ss->dev, "HALT(%02X) %d\n", usb_ss_ep->address, value); + + spin_lock_irqsave(&usb_ss->lock, flags); + + select_ep(usb_ss, ep->desc->bEndpointAddress); + if (value) { + cdns_ep_stall_flush(usb_ss_ep); + } else { + /* + * TODO: + * epp->wedgeFlag = 0; + */ + usb_ss_ep->wedge_flag = 0; + cdns_writel(&usb_ss->regs->ep_cmd, + EP_CMD__CSTALL__MASK | EP_CMD__EPRST__MASK); + /* wait for EPRST cleared */ + while (cdns_readl(&usb_ss->regs->ep_cmd) & + EP_CMD__EPRST__MASK) + ; + usb_ss_ep->stalled_flag = 0; + } + usb_ss_ep->hw_pending_flag = 0; + + spin_unlock_irqrestore(&usb_ss->lock, flags); + + return 0; +} + +/** + * usb_ss_gadget_ep_set_wedge Set wedge on selected endpoint + * @ep: endpoint object + * + * Returns 0 + */ +static int usb_ss_gadget_ep_set_wedge(struct usb_ep *ep) +{ + struct usb_ss_endpoint *usb_ss_ep = to_usb_ss_ep(ep); + struct usb_ss_dev __maybe_unused *usb_ss = usb_ss_ep->usb_ss; + + dev_dbg(&usb_ss->dev, "WEDGE(%02X)\n", usb_ss_ep->address); + usb_ss_gadget_ep_set_halt(ep, 1); + usb_ss_ep->wedge_flag = 1; + return 0; +} + +static const struct usb_ep_ops usb_ss_gadget_ep0_ops = { + .enable = usb_ss_gadget_ep0_enable, + .disable = usb_ss_gadget_ep0_disable, + .alloc_request = usb_ss_gadget_ep_alloc_request, + .free_request = usb_ss_gadget_ep_free_request, + .queue = usb_ss_gadget_ep0_queue, + .dequeue = usb_ss_gadget_ep_dequeue, + .set_halt = usb_ss_gadget_ep0_set_halt, + .set_wedge = usb_ss_gadget_ep_set_wedge, +}; + +static const struct usb_ep_ops usb_ss_gadget_ep_ops = { + .enable = usb_ss_gadget_ep_enable, + .disable = usb_ss_gadget_ep_disable, + .alloc_request = usb_ss_gadget_ep_alloc_request, + .free_request = usb_ss_gadget_ep_free_request, + .queue = usb_ss_gadget_ep_queue, + .dequeue = usb_ss_gadget_ep_dequeue, + .set_halt = usb_ss_gadget_ep_set_halt, + .set_wedge = usb_ss_gadget_ep_set_wedge, +}; + +/** + * usb_ss_gadget_get_frame Returns number of actual ITP frame + * @gadget: gadget object + * + * Returns number of actual ITP frame + */ +static int usb_ss_gadget_get_frame(struct usb_gadget *gadget) +{ + struct usb_ss_dev *usb_ss = gadget_to_usb_ss(gadget); + + dev_dbg(&usb_ss->dev, "%s\n", __func__); + return cdns_readl(&usb_ss->regs->usb_iptn); +} + +static int usb_ss_gadget_wakeup(struct usb_gadget *gadget) +{ + struct usb_ss_dev __maybe_unused *usb_ss = gadget_to_usb_ss(gadget); + + dev_dbg(&usb_ss->dev, "%s\n", __func__); + return 0; +} + +static int usb_ss_gadget_set_selfpowered(struct usb_gadget *gadget, + int is_selfpowered) +{ + struct usb_ss_dev __maybe_unused *usb_ss = gadget_to_usb_ss(gadget); + + dev_dbg(&usb_ss->dev, "%s: %d\n", __func__, is_selfpowered); + return 0; +} + +static int usb_ss_gadget_pullup(struct usb_gadget *gadget, int is_on) +{ + struct usb_ss_dev *usb_ss = gadget_to_usb_ss(gadget); + + if (!usb_ss->start_gadget) + return 0; + + dev_dbg(&usb_ss->dev, "%s: %d\n", __func__, is_on); + + if (is_on) + cdns_writel(&usb_ss->regs->usb_conf, USB_CONF__DEVEN__MASK); + else + cdns_writel(&usb_ss->regs->usb_conf, USB_CONF__DEVDS__MASK); + + return 0; +} + +/** + * usb_ss_gadget_udc_start Gadget start + * @gadget: gadget object + * @driver: driver which operates on this gadget + * + * Returns 0 on success, error code elsewhere + */ +static int usb_ss_gadget_udc_start(struct usb_gadget *gadget, + struct usb_gadget_driver *driver) +{ + struct usb_ss_dev *usb_ss = gadget_to_usb_ss(gadget); + unsigned long flags; + + if (usb_ss->gadget_driver) { + dev_err(&usb_ss->dev, "%s is already bound\n", + usb_ss->gadget.name); + return -EBUSY; + } + + dev_dbg(&usb_ss->dev, "%s begins\n", __func__); + + spin_lock_irqsave(&usb_ss->lock, flags); + usb_ss->gadget_driver = driver; + if (!usb_ss->start_gadget) { + spin_unlock_irqrestore(&usb_ss->lock, flags); + return 0; + } + + __cdns3_gadget_start(usb_ss); + spin_unlock_irqrestore(&usb_ss->lock, flags); + dev_dbg(&usb_ss->dev, "%s ends\n", __func__); + + return 0; +} + +/** + * usb_ss_gadget_udc_stop Stops gadget + * @gadget: gadget object + * + * Returns 0 + */ +static int usb_ss_gadget_udc_stop(struct usb_gadget *gadget) +{ + struct usb_ss_dev *usb_ss = gadget_to_usb_ss(gadget); + struct usb_ep *ep; + struct usb_ss_endpoint *usb_ss_ep; + int i; + u32 bEndpointAddress; + + usb_ss->gadget_driver = NULL; + if (!usb_ss->start_gadget) + return 0; + + list_for_each_entry(ep, &usb_ss->gadget.ep_list, ep_list) { + usb_ss_ep = to_usb_ss_ep(ep); + bEndpointAddress = usb_ss_ep->num | usb_ss_ep->dir; + usb_ss_ep->used = false; + select_ep(usb_ss, bEndpointAddress); + cdns_writel(&usb_ss->regs->ep_cmd, EP_CMD__EPRST__MASK); + while (cdns_readl(&usb_ss->regs->ep_cmd) + & EP_CMD__EPRST__MASK) + ; + } + + /* disable interrupt for device */ + cdns_writel(&usb_ss->regs->usb_ien, 0); + cdns_writel(&usb_ss->regs->usb_conf, USB_CONF__DEVDS__MASK); + + for (i = 0; i < usb_ss->ep_nums ; i++) + usb_ss_free_trb_pool(usb_ss->eps[i]); + + return 0; +} + +static void cdns3_gadget_set_speed(struct usb_gadget *g, + enum usb_device_speed speed) +{ + struct usb_ss_dev *usb_ss = gadget_to_usb_ss(g); + + usb_ss->gadget.max_speed = speed; +} + +static const struct usb_gadget_ops usb_ss_gadget_ops = { + .get_frame = usb_ss_gadget_get_frame, + .wakeup = usb_ss_gadget_wakeup, + .set_selfpowered = usb_ss_gadget_set_selfpowered, + .pullup = usb_ss_gadget_pullup, + .udc_start = usb_ss_gadget_udc_start, + .udc_stop = usb_ss_gadget_udc_stop, + .match_ep = usb_ss_gadget_match_ep, + .udc_set_speed = cdns3_gadget_set_speed, + +}; + +/** + * usb_ss_init_ep Initializes software endpoints of gadget + * @usb_ss: extended gadget object + * + * Returns 0 on success, error code elsewhere + */ +static int usb_ss_init_ep(struct usb_ss_dev *usb_ss) +{ + struct usb_ss_endpoint *usb_ss_ep; + u32 ep_enabled_reg, iso_ep_reg, bulk_ep_reg; + int i; + int ep_reg_pos, ep_dir, ep_number; + int found_endpoints = 0; + + /* Read it from USB_CAP3 to USB_CAP5 */ + ep_enabled_reg = 0x00ff00ff; + iso_ep_reg = 0x00fe00fe; + bulk_ep_reg = 0x00fe00fe; + + dev_dbg(&usb_ss->dev, "Initializing non-zero endpoints\n"); + dev_dbg(&usb_ss->dev, + "ep_enabled_reg: 0x%x, iso_ep_reg: 0x%x, bulk_ep_reg:0x%x\n", + ep_enabled_reg, iso_ep_reg, bulk_ep_reg); + + for (i = 0; i < USB_SS_ENDPOINTS_MAX_COUNT; i++) { + ep_number = (i / 2) + 1; + ep_dir = i % 2; + ep_reg_pos = (16 * ep_dir) + ep_number; + + if (!(ep_enabled_reg & (1uL << ep_reg_pos))) + continue; + + /* create empty endpoint object */ + usb_ss_ep = devm_kzalloc(&usb_ss->dev, sizeof(*usb_ss_ep), + GFP_KERNEL); + if (!usb_ss_ep) + return -ENOMEM; + + /* set parent of endpoint object */ + usb_ss_ep->usb_ss = usb_ss; + + /* set index of endpoint in endpoints container */ + usb_ss->eps[found_endpoints++] = usb_ss_ep; + + /* set name of endpoint */ + snprintf(usb_ss_ep->name, sizeof(usb_ss_ep->name), "ep%d%s", + ep_number, !!ep_dir ? "in" : "out"); + usb_ss_ep->endpoint.name = usb_ss_ep->name; + dev_dbg(&usb_ss->dev, "Initializing endpoint: %s\n", + usb_ss_ep->name); + + usb_ep_set_maxpacket_limit(&usb_ss_ep->endpoint, + ENDPOINT_MAX_PACKET_LIMIT); + usb_ss_ep->endpoint.max_streams = ENDPOINT_MAX_STREAMS; + usb_ss_ep->endpoint.ops = &usb_ss_gadget_ep_ops; + if (ep_dir) + usb_ss_ep->caps.dir_in = 1; + else + usb_ss_ep->caps.dir_out = 1; + + /* check endpoint type */ + if (iso_ep_reg & (1uL << ep_reg_pos)) + usb_ss_ep->caps.type_iso = 1; + + if (bulk_ep_reg & (1uL << ep_reg_pos)) { + usb_ss_ep->caps.type_bulk = 1; + usb_ss_ep->caps.type_int = 1; + usb_ss_ep->endpoint.maxburst = 15; + } + + list_add_tail(&usb_ss_ep->endpoint.ep_list, + &usb_ss->gadget.ep_list); + INIT_LIST_HEAD(&usb_ss_ep->request_list); + INIT_LIST_HEAD(&usb_ss_ep->ep_match_pending_list); + } + usb_ss->ep_nums = found_endpoints; + + return 0; +} + +/** + * usb_ss_init_ep0 Initializes software endpoint 0 of gadget + * @usb_ss: extended gadget object + * + * Returns 0 on success, error code elsewhere + */ +static int usb_ss_init_ep0(struct usb_ss_dev *usb_ss) +{ + struct usb_ss_endpoint *ep0; + + dev_dbg(&usb_ss->dev, "Initializing EP0\n"); + ep0 = devm_kzalloc(&usb_ss->dev, sizeof(struct usb_ss_endpoint), + GFP_KERNEL); + + if (!ep0) + return -ENOMEM; + + /* fill CDNS fields */ + ep0->usb_ss = usb_ss; + sprintf(ep0->name, "ep0"); + + /* fill linux fields */ + ep0->endpoint.ops = &usb_ss_gadget_ep0_ops; + ep0->endpoint.maxburst = 1; + usb_ep_set_maxpacket_limit(&ep0->endpoint, ENDPOINT0_MAX_PACKET_LIMIT); + ep0->address = 0; + ep0->enabled = 1; + ep0->caps.type_control = 1; + ep0->caps.dir_in = 1; + ep0->caps.dir_out = 1; + ep0->endpoint.name = ep0->name; + ep0->endpoint.desc = &cdns3_gadget_ep0_desc; + usb_ss->gadget.ep0 = &ep0->endpoint; + INIT_LIST_HEAD(&ep0->request_list); + + return 0; +} + +static int __cdns3_gadget_init(struct cdns3 *cdns) +{ + struct usb_ss_dev *usb_ss; + int ret; + struct udevice *dev; + struct cdns3_generic_peripheral *priv = container_of(cdns, + struct cdns3_generic_peripheral, cdns3); + + usb_ss = &priv->usb_ss_dev; + dev = &usb_ss->dev; + dev->parent = cdns->dev; + dev_set_name(dev, "gadget-cdns3-dev"); + cdns->gadget_dev = dev; + usb_ss->sysdev = cdns->dev; + ret = device_register(dev); + if (ret) + goto err1; + + usb_ss->regs = cdns->dev_regs; + + /* fill gadget fields */ + usb_ss->gadget.ops = &usb_ss_gadget_ops; + usb_ss->gadget.max_speed = USB_SPEED_SUPER; + usb_ss->gadget.speed = USB_SPEED_UNKNOWN; + usb_ss->gadget.name = "cdns3-gadget"; + usb_ss->is_connected = 0; + spin_lock_init(&usb_ss->lock); + + usb_ss->in_standby_mode = 1; + + /* initialize endpoint container */ + INIT_LIST_HEAD(&usb_ss->gadget.ep_list); + INIT_LIST_HEAD(&usb_ss->ep_match_list); + ret = usb_ss_init_ep0(usb_ss); + if (ret) { + dev_err(dev, "Failed to create endpoint 0\n"); + ret = -ENOMEM; + goto err2; + } + + ret = usb_ss_init_ep(usb_ss); + if (ret) { + dev_err(dev, "Failed to create non zero endpoints\n"); + ret = -ENOMEM; + goto err2; + } + + /* allocate memory for default endpoint TRB */ + usb_ss->trb_ep0 = (u32 *)dma_alloc_coherent(20, + (unsigned long *)&usb_ss->trb_ep0_dma); + if (!usb_ss->trb_ep0) { + dev_err(dev, "Failed to allocate memory for ep0 TRB\n"); + ret = -ENOMEM; + goto err2; + } + + /* allocate memory for setup packet buffer */ + usb_ss->setup = (u8 *)dma_alloc_coherent(8, + (unsigned long *)&usb_ss->setup_dma); + if (!usb_ss->setup) { + dev_err(dev, "Failed to allocate memory for SETUP buffer\n"); + ret = -ENOMEM; + goto err3; + } + + /* add USB gadget device */ + ret = usb_add_gadget_udc((struct device *)(&usb_ss->dev), + &usb_ss->gadget); + if (ret < 0) { + dev_err(dev, "Failed to register USB device controller\n"); + goto err4; + } + + return 0; + +err4: + dma_free_coherent(usb_ss->setup); +err3: + dma_free_coherent(usb_ss->trb_ep0); +err2: +err1: + cdns->gadget_dev = NULL; + + return ret; +} + +/** + * cdns3_gadget_remove: parent must call this to remove UDC + * + * cdns: cdns3 instance + * + */ +void cdns3_gadget_remove(struct cdns3 *cdns) +{ + struct usb_ss_dev *usb_ss; + + if (!cdns->roles[CDNS3_ROLE_GADGET]) + return; + + usb_ss = container_of(cdns->gadget_dev, struct usb_ss_dev, dev); + usb_del_gadget_udc(&usb_ss->gadget); + dma_free_coherent(usb_ss->setup); + dma_free_coherent(usb_ss->trb_ep0); + device_unregister(cdns->gadget_dev); + cdns->gadget_dev = NULL; +} + +static void __cdns3_gadget_start(struct usb_ss_dev *usb_ss) +{ + u32 usb_conf_reg = 0; + + /* configure endpoint 0 hardware */ + cdns_ep0_config(usb_ss); + + /* enable interrupts for endpoint 0 (in and out) */ + cdns_writel(&usb_ss->regs->ep_ien, + EP_IEN__EOUTEN0__MASK | EP_IEN__EINEN0__MASK); + + /* enable interrupt for device */ + cdns_writel(&usb_ss->regs->usb_ien, + USB_IEN__U2RESIEN__MASK + | USB_ISTS__DIS2I__MASK + | USB_IEN__CON2IEN__MASK + | USB_IEN__UHRESIEN__MASK + | USB_IEN__UWRESIEN__MASK + | USB_IEN__DISIEN__MASK + | USB_IEN__CONIEN__MASK + | USB_IEN__U3EXTIEN__MASK + | USB_IEN__L2ENTIEN__MASK + | USB_IEN__L2EXTIEN__MASK); + + usb_conf_reg = USB_CONF__CLK2OFFDS__MASK | + USB_CONF__L1DS__MASK; + if (usb_ss->gadget.max_speed == USB_SPEED_HIGH) + usb_conf_reg |= USB_CONF__USB3DIS__MASK; + cdns_writel(&usb_ss->regs->usb_conf, usb_conf_reg); + + cdns_writel(&usb_ss->regs->usb_conf, + USB_CONF__U1DS__MASK + | USB_CONF__U2DS__MASK + ); + + cdns_writel(&usb_ss->regs->usb_conf, USB_CONF__DEVEN__MASK); + + cdns_writel(&usb_ss->regs->dbg_link1, + DBG_LINK1__LFPS_MIN_GEN_U1_EXIT_SET__MASK | + DBG_LINK1__LFPS_MIN_GEN_U1_EXIT__WRITE(0x3C)); +} + +static int cdns3_gadget_start(struct cdns3 *cdns) +{ + struct usb_ss_dev *usb_ss = container_of(cdns->gadget_dev, + struct usb_ss_dev, dev); + unsigned long flags; + + dev_dbg(&usb_ss->dev, "%s begins\n", __func__); + + pm_runtime_get_sync(cdns->dev); + spin_lock_irqsave(&usb_ss->lock, flags); + usb_ss->start_gadget = 1; + if (!usb_ss->gadget_driver) { + spin_unlock_irqrestore(&usb_ss->lock, flags); + return 0; + } + + __cdns3_gadget_start(usb_ss); + usb_ss->in_standby_mode = 0; + spin_unlock_irqrestore(&usb_ss->lock, flags); + dev_dbg(&usb_ss->dev, "%s ends\n", __func__); + + return 0; +} + +static void __cdns3_gadget_stop(struct cdns3 *cdns) +{ + struct usb_ss_dev *usb_ss; + unsigned long flags; + + usb_ss = container_of(cdns->gadget_dev, struct usb_ss_dev, dev); + if (usb_ss->gadget_driver) + usb_ss->gadget_driver->disconnect(&usb_ss->gadget); + usb_gadget_disconnect(&usb_ss->gadget); + spin_lock_irqsave(&usb_ss->lock, flags); + /* disable interrupt for device */ + cdns_writel(&usb_ss->regs->usb_ien, 0); + cdns_writel(&usb_ss->regs->usb_conf, USB_CONF__DEVDS__MASK); + usb_ss->start_gadget = 0; + spin_unlock_irqrestore(&usb_ss->lock, flags); +} + +static void cdns3_gadget_stop(struct cdns3 *cdns) +{ + if (cdns->role == CDNS3_ROLE_GADGET) + __cdns3_gadget_stop(cdns); +} + +/** + * cdns3_gadget_init - initialize device structure + * + * cdns: cdns3 instance + * + * This function initializes the gadget. + */ +int cdns3_gadget_init(struct cdns3 *cdns) +{ + struct cdns3_role_driver *rdrv; + + rdrv = devm_kzalloc(cdns->dev, sizeof(*rdrv), GFP_KERNEL); + if (!rdrv) + return -ENOMEM; + + rdrv->start = cdns3_gadget_start; + rdrv->stop = cdns3_gadget_stop; + rdrv->irq = cdns_irq_handler_thread; + rdrv->name = "gadget"; + cdns->roles[CDNS3_ROLE_GADGET] = rdrv; + return __cdns3_gadget_init(cdns); +} diff --git a/drivers/usb/cdns3/gadget.h b/drivers/usb/cdns3/gadget.h new file mode 100644 index 0000000000..5015aab594 --- /dev/null +++ b/drivers/usb/cdns3/gadget.h @@ -0,0 +1,225 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2016 Cadence Design Systems - http://www.cadence.com + * Copyright 2019 NXP + */ +#ifndef __DRIVERS_CDNS3_GADGET +#define __DRIVERS_CDNS3_GADGET + +#include "dev-regs-map.h" + +#if IS_ENABLED(CONFIG_USB_CDNS_MISC) +#include "cdns_misc.h" +#endif + +#include <dm.h> +#include <clk.h> +#include <generic-phy.h> + +#define gadget_to_usb_ss(g) \ + (container_of(g, struct usb_ss_dev, gadget)) + +#define to_usb_ss_ep(ep) \ + (container_of(ep, struct usb_ss_endpoint, endpoint)) + +#define ep_to_usb_ss_ep(ep) \ + (container_of(ep, struct usb_ss_endpoint, endpoint)) + +/*-------------------------------------------------------------------------*/ +/* TRB macros */ + +/* Common TRB fields */ +#define TRB_SET_CYCLE_BIT 1uL +#define TRB_SET_CHAIN_BIT 0x10 + +/* offset 0 */ +#define TRB_DATA_BUFFER_POINTER_MASK 0xFFFFFFFF +#define TRB_SET_DATA_BUFFER_POINTER(p) (p & TRB_DATA_BUFFER_POINTER_MASK) + +/* offset 4 */ +#define TRB_TRANSFER_LENGTH_MASK 0x1FFFF +#define TRB_SET_TRANSFER_LENGTH(l) (l & TRB_TRANSFER_LENGTH_MASK) + +#define TRB_BURST_LENGTH_MASK 0xFF +#define TRB_SET_BURST_LENGTH(l) ((l & TRB_BURST_LENGTH_MASK) << 24) + +/* offset 8 */ +#define TRB_SET_INT_ON_SHORT_PACKET 0x04 +#define TRB_SET_FIFO_MODE 0x08 +#define TRB_SET_INT_ON_COMPLETION 0x20 + +#define TRB_TYPE_NORMAL 0x400 + +#define TRB_STREAM_ID_MASK 0xFFFF +#define TRB_SET_STREAM_ID(sid) ((sid & TRB_STREAM_ID_MASK) << 16) + +/*-------------------------------------------------------------------------*/ +/* Driver numeric constants */ + +#define DEVICE_ADDRESS_MAX 127 + +/* Endpoint init values */ +#define ENDPOINT_MAX_PACKET_LIMIT 1024 + +#define ENDPOINT_MAX_STREAMS 15 + +#define ENDPOINT0_MAX_PACKET_LIMIT 512 + +/* All endpoints except EP0 */ +#define USB_SS_ENDPOINTS_MAX_COUNT 30 + +#define USB_SS_TRBS_NUM 32 + +/* Standby mode */ +#define STB_CLK_SWITCH_DONE_MASK 0x200 +#define STB_CLK_SWITCH_EN_MASK 0x100 +#define STB_CLK_SWITCH_EN_SHIFT 8 + +#define ENDPOINT_MAX_PACKET_SIZE_0 0 +#define ENDPOINT_MAX_PACKET_SIZE_8 8 +#define ENDPOINT_MAX_PACKET_SIZE_64 64 +#define ENDPOINT_MAX_PACKET_SIZE_512 512 +#define ENDPOINT_MAX_PACKET_SIZE_1023 1023 +#define ENDPOINT_MAX_PACKET_SIZE_1024 1024 + +#define SS_LINK_STATE_U3 3 +#define FSHS_LPM_STATE_L2 2 + +#define ADDR_MODULO_8 8 + +#define INTERRUPT_MASK 0xFFFFFFFF + +#define ACTUAL_TRANSFERRED_BYTES_MASK 0x1FFFF + +#define ENDPOINT_DIR_MASK 0x80 + +/*-------------------------------------------------------------------------*/ + +/** + * IS_REG_REQUIRING_ACTIVE_REF_CLOCK - Macro checks if desired + * register requires active clock, it involves such registers as: + * EP_CFG, EP_TR_ADDR, EP_CMD, EP_SEL, USB_CONF + * @usb_ss: extended gadget object + * @reg: register address + */ +#define IS_REG_REQUIRING_ACTIVE_REF_CLOCK(usb_ss, reg) (!(reg) || \ + ((reg) >= &(usb_ss)->regs->ep_sel && (reg) <= &(usb_ss)->regs->ep_cmd)) + +/** + * CAST_EP_REG_POS_TO_INDEX - Macro converts bit position of ep_ists register to + * index of endpoint object in usb_ss_dev.eps[] container + * @i: bit position of endpoint for which endpoint object is required + * + * Remember that endpoint container doesn't contain default endpoint + */ +#define CAST_EP_REG_POS_TO_INDEX(i) (((i) / 16) + ((((i) % 16) - 2) * 2)) + +/** + * CAST_EP_ADDR_TO_INDEX - Macro converts endpoint address to + * index of endpoint object in usb_ss_dev.eps[] container + * @ep_addr: endpoint address for which endpoint object is required + * + * Remember that endpoint container doesn't contain default endpoint + */ +#define CAST_EP_ADDR_TO_INDEX(ep_addr) \ + ((((ep_addr) & 0x7F) - 1) + (((ep_addr) & 0x80) ? 1 : 0)) + +/** + * CAST_EP_ADDR_TO_BIT_POS - Macro converts endpoint address to + * bit position in ep_ists register + * @ep_addr: endpoint address for which bit position is required + * + * Remember that endpoint container doesn't contain default endpoint + */ +#define CAST_EP_ADDR_TO_BIT_POS(ep_addr) \ + (((u32)1 << ((ep_addr) & 0x7F)) << (((ep_addr) & 0x80) ? 16 : 0)) + +#define CAST_INDEX_TO_EP_ADDR(index) \ + (((index) / 2 + 1) | (((index) % 2) ? 0x80 : 0x00)) + +/*-------------------------------------------------------------------------*/ +/* Used structs */ + +struct usb_ss_trb { + u32 offset0; + u32 offset4; + u32 offset8; +}; + +struct usb_ss_dev; + +struct usb_ep_caps { + unsigned type_control:1; + unsigned type_iso:1; + unsigned type_bulk:1; + unsigned type_int:1; + unsigned dir_in:1; + unsigned dir_out:1; +}; + +struct usb_ss_endpoint { + struct usb_ep endpoint; + struct list_head request_list; + struct list_head ep_match_pending_list; + + struct usb_ss_trb *trb_pool; + dma_addr_t trb_pool_dma; + + struct usb_ss_dev *usb_ss; + char name[20]; + int hw_pending_flag; + int stalled_flag; + int wedge_flag; + void *cpu_addr; + dma_addr_t dma_addr; + u8 dir; + u8 num; + u8 type; + u8 address; + bool used; + bool enabled; + struct usb_ep_caps caps; +}; + +struct usb_ss_dev { + struct udevice dev; + struct usbss_dev_register_block_type __iomem *regs; + + struct usb_gadget gadget; + struct usb_gadget_driver *gadget_driver; + + dma_addr_t setup_dma; + dma_addr_t trb_ep0_dma; + u32 *trb_ep0; + u8 *setup; + + struct usb_ss_endpoint *eps[USB_SS_ENDPOINTS_MAX_COUNT]; + int ep_nums; + struct usb_request *actual_ep0_request; + int ep0_data_dir; + int hw_configured_flag; + int wake_up_flag; + u16 isoch_delay; + spinlock_t lock; /* protection lock */ + + unsigned is_connected:1; + unsigned in_standby_mode:1; + + u32 usb_ien; + u32 ep_ien; + int setup_pending; + struct udevice *sysdev; + bool start_gadget; /* The device mode is enabled */ + struct list_head ep_match_list; +}; + +struct cdns3_generic_peripheral { + struct cdns3 cdns3; + struct usb_ss_dev usb_ss_dev; + struct clk_bulk clks; + struct phy phy; +}; + +#define OTG_STS_SELECTOR 0xF000 /* OTG status selector */ + +#endif /* __DRIVERS_CDNS3_GADGET */ diff --git a/drivers/usb/cdns3/io.h b/drivers/usb/cdns3/io.h new file mode 100644 index 0000000000..22b1b03950 --- /dev/null +++ b/drivers/usb/cdns3/io.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2016 Cadence Design Systems - https://www.cadence.com/ + * Copyright 2019 NXP + */ + +#ifndef __DRIVERS_USB_CDNS_IO_H +#define __DRIVERS_USB_CDNS_IO_H + +#include <linux/io.h> + +static inline u32 cdns_readl(u32 __iomem *reg) +{ + u32 value = 0; + + value = readl(reg); + return value; +} + +static inline void cdns_writel(u32 __iomem *reg, u32 value) +{ + writel(value, reg); +} + +static inline void cdns_flush_cache(uintptr_t addr, int length) +{ + flush_dcache_range(addr, addr + ROUND(length, ARCH_DMA_MINALIGN)); +} + +#endif /* __DRIVERS_USB_CDNS_IO_H */ diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c index 179b94cdd0..360f2b75ff 100644 --- a/drivers/usb/gadget/epautoconf.c +++ b/drivers/usb/gadget/epautoconf.c @@ -167,6 +167,10 @@ static int ep_matches( size = 64; put_unaligned(cpu_to_le16(size), &desc->wMaxPacketSize); } + + if (gadget->ops->match_ep) + return gadget->ops->match_ep(gadget, ep, desc); + return 1; }

diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h index 2c8f235d51..ba9114cf37 100644 --- a/drivers/usb/gadget/gadget_chips.h +++ b/drivers/usb/gadget/gadget_chips.h @@ -149,6 +149,11 @@ #define gadget_is_dwc3(g) 0 #endif

+#ifdef CONFIG_USB_CDNS3_GADGET +#define gadget_is_cdns3(g) (!strcmp("cdns3-gadget", (g)->name)) +#else +#define gadget_is_cdns3(g) 0 +#endif /** * usb_gadget_controller_number - support bcdDevice id convention * @gadget: the controller being driven @@ -208,5 +213,7 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget) return 0x22; else if (gadget_is_dwc3(gadget)) return 0x23; + else if (gadget_is_cdns3(gadget)) + return 0x24; return -ENOENT; } diff --git a/drivers/usb/gadget/udc/Makefile b/drivers/usb/gadget/udc/Makefile index 95dbf0c82e..414edad921 100644 --- a/drivers/usb/gadget/udc/Makefile +++ b/drivers/usb/gadget/udc/Makefile @@ -4,6 +4,7 @@

ifndef CONFIG_$(SPL_)DM_USB_GADGET obj-$(CONFIG_USB_DWC3_GADGET) += udc-core.o +obj-$(CONFIG_USB_CDNS3_GADGET) += udc-core.o endif

obj-$(CONFIG_$(SPL_)DM_USB_GADGET) += udc-core.o diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h index 497798a32a..a34f3478f3 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -447,6 +447,9 @@ struct usb_gadget_ops { int (*udc_start)(struct usb_gadget *, struct usb_gadget_driver *); int (*udc_stop)(struct usb_gadget *); + int (*match_ep)(struct usb_gadget *gadget, + struct usb_ep *ep, + struct usb_endpoint_descriptor *desc); };

/** diff --git a/scripts/Makefile.spl b/scripts/Makefile.spl index 7af6b120b6..d731c21aa4 100644 --- a/scripts/Makefile.spl +++ b/scripts/Makefile.spl @@ -88,6 +88,7 @@ endif

libs-y += drivers/ libs-$(CONFIG_SPL_USB_GADGET) += drivers/usb/dwc3/ +libs-$(CONFIG_SPL_USB_GADGET) += drivers/usb/cdns3/ libs-y += dts/ libs-y += fs/ libs-$(CONFIG_SPL_POST_MEM_SUPPORT) += post/drivers/