// SPDX-License-Identifier: GPL-2.0 /* * Renesas USBF USB Function driver * * Copyright 2022 Schneider Electric * Author: Herve Codina <[email protected]> */ #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/kfifo.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/types.h> #include <linux/usb/composite.h> #include <linux/usb/gadget.h> #include <linux/usb/role.h> #define USBF_NUM_ENDPOINTS … #define USBF_EP0_MAX_PCKT_SIZE … /* EPC registers */ #define USBF_REG_USB_CONTROL … #define USBF_USB_PUE2 … #define USBF_USB_CONNECTB … #define USBF_USB_DEFAULT … #define USBF_USB_CONF … #define USBF_USB_SUSPEND … #define USBF_USB_RSUM_IN … #define USBF_USB_SOF_RCV … #define USBF_USB_FORCEFS … #define USBF_USB_INT_SEL … #define USBF_USB_SOF_CLK_MODE … #define USBF_REG_USB_STATUS … #define USBF_USB_RSUM_OUT … #define USBF_USB_SPND_OUT … #define USBF_USB_USB_RST … #define USBF_USB_DEFAULT_ST … #define USBF_USB_CONF_ST … #define USBF_USB_SPEED_MODE … #define USBF_USB_SOF_DELAY_STATUS … #define USBF_REG_USB_ADDRESS … #define USBF_USB_SOF_STATUS … #define USBF_USB_SET_USB_ADDR(_a) … #define USBF_USB_GET_FRAME(_r) … #define USBF_REG_SETUP_DATA0 … #define USBF_REG_SETUP_DATA1 … #define USBF_REG_USB_INT_STA … #define USBF_USB_RSUM_INT … #define USBF_USB_SPND_INT … #define USBF_USB_USB_RST_INT … #define USBF_USB_SOF_INT … #define USBF_USB_SOF_ERROR_INT … #define USBF_USB_SPEED_MODE_INT … #define USBF_USB_EPN_INT(_n) … #define USBF_REG_USB_INT_ENA … #define USBF_USB_RSUM_EN … #define USBF_USB_SPND_EN … #define USBF_USB_USB_RST_EN … #define USBF_USB_SOF_EN … #define USBF_USB_SOF_ERROR_EN … #define USBF_USB_SPEED_MODE_EN … #define USBF_USB_EPN_EN(_n) … #define USBF_BASE_EP0 … /* EP0 registers offsets from Base + USBF_BASE_EP0 (EP0 regs area) */ #define USBF_REG_EP0_CONTROL … #define USBF_EP0_ONAK … #define USBF_EP0_INAK … #define USBF_EP0_STL … #define USBF_EP0_PERR_NAK_CLR … #define USBF_EP0_INAK_EN … #define USBF_EP0_DW_MASK … #define USBF_EP0_DW(_s) … #define USBF_EP0_DEND … #define USBF_EP0_BCLR … #define USBF_EP0_PIDCLR … #define USBF_EP0_AUTO … #define USBF_EP0_OVERSEL … #define USBF_EP0_STGSEL … #define USBF_REG_EP0_STATUS … #define USBF_EP0_SETUP_INT … #define USBF_EP0_STG_START_INT … #define USBF_EP0_STG_END_INT … #define USBF_EP0_STALL_INT … #define USBF_EP0_IN_INT … #define USBF_EP0_OUT_INT … #define USBF_EP0_OUT_OR_INT … #define USBF_EP0_OUT_NULL_INT … #define USBF_EP0_IN_EMPTY … #define USBF_EP0_IN_FULL … #define USBF_EP0_IN_DATA … #define USBF_EP0_IN_NAK_INT … #define USBF_EP0_OUT_EMPTY … #define USBF_EP0_OUT_FULL … #define USBF_EP0_OUT_NULL … #define USBF_EP0_OUT_NAK_INT … #define USBF_EP0_PERR_NAK_INT … #define USBF_EP0_PERR_NAK … #define USBF_EP0_PID … #define USBF_REG_EP0_INT_ENA … #define USBF_EP0_SETUP_EN … #define USBF_EP0_STG_START_EN … #define USBF_EP0_STG_END_EN … #define USBF_EP0_STALL_EN … #define USBF_EP0_IN_EN … #define USBF_EP0_OUT_EN … #define USBF_EP0_OUT_OR_EN … #define USBF_EP0_OUT_NULL_EN … #define USBF_EP0_IN_NAK_EN … #define USBF_EP0_OUT_NAK_EN … #define USBF_EP0_PERR_NAK_EN … #define USBF_REG_EP0_LENGTH … #define USBF_EP0_LDATA … #define USBF_REG_EP0_READ … #define USBF_REG_EP0_WRITE … #define USBF_BASE_EPN(_n) … /* EPn registers offsets from Base + USBF_BASE_EPN(n-1). n=1..15 */ #define USBF_REG_EPN_CONTROL … #define USBF_EPN_ONAK … #define USBF_EPN_OSTL … #define USBF_EPN_ISTL … #define USBF_EPN_OSTL_EN … #define USBF_EPN_DW_MASK … #define USBF_EPN_DW(_s) … #define USBF_EPN_DEND … #define USBF_EPN_CBCLR … #define USBF_EPN_BCLR … #define USBF_EPN_OPIDCLR … #define USBF_EPN_IPIDCLR … #define USBF_EPN_AUTO … #define USBF_EPN_OVERSEL … #define USBF_EPN_MODE_MASK … #define USBF_EPN_MODE_BULK … #define USBF_EPN_MODE_INTR … #define USBF_EPN_MODE_ISO … #define USBF_EPN_DIR0 … #define USBF_EPN_BUF_TYPE_DOUBLE … #define USBF_EPN_EN … #define USBF_REG_EPN_STATUS … #define USBF_EPN_IN_EMPTY … #define USBF_EPN_IN_FULL … #define USBF_EPN_IN_DATA … #define USBF_EPN_IN_INT … #define USBF_EPN_IN_STALL_INT … #define USBF_EPN_IN_NAK_ERR_INT … #define USBF_EPN_IN_END_INT … #define USBF_EPN_IPID … #define USBF_EPN_OUT_EMPTY … #define USBF_EPN_OUT_FULL … #define USBF_EPN_OUT_NULL_INT … #define USBF_EPN_OUT_INT … #define USBF_EPN_OUT_STALL_INT … #define USBF_EPN_OUT_NAK_ERR_INT … #define USBF_EPN_OUT_OR_INT … #define USBF_EPN_OUT_END_INT … #define USBF_EPN_ISO_CRC … #define USBF_EPN_ISO_OR … #define USBF_EPN_OUT_NOTKN … #define USBF_EPN_ISO_OPID … #define USBF_EPN_ISO_PIDERR … #define USBF_REG_EPN_INT_ENA … #define USBF_EPN_IN_EN … #define USBF_EPN_IN_STALL_EN … #define USBF_EPN_IN_NAK_ERR_EN … #define USBF_EPN_IN_END_EN … #define USBF_EPN_OUT_NULL_EN … #define USBF_EPN_OUT_EN … #define USBF_EPN_OUT_STALL_EN … #define USBF_EPN_OUT_NAK_ERR_EN … #define USBF_EPN_OUT_OR_EN … #define USBF_EPN_OUT_END_EN … #define USBF_REG_EPN_DMA_CTRL … #define USBF_EPN_DMAMODE0 … #define USBF_EPN_DMA_EN … #define USBF_EPN_STOP_SET … #define USBF_EPN_BURST_SET … #define USBF_EPN_DEND_SET … #define USBF_EPN_STOP_MODE … #define USBF_REG_EPN_PCKT_ADRS … #define USBF_EPN_MPKT(_l) … #define USBF_EPN_BASEAD(_a) … #define USBF_REG_EPN_LEN_DCNT … #define USBF_EPN_GET_LDATA(_r) … #define USBF_EPN_SET_DMACNT(_c) … #define USBF_EPN_GET_DMACNT(_r) … #define USBF_REG_EPN_READ … #define USBF_REG_EPN_WRITE … /* AHB-EPC Bridge registers */ #define USBF_REG_AHBSCTR … #define USBF_REG_AHBMCTR … #define USBF_SYS_WBURST_TYPE … #define USBF_SYS_ARBITER_CTR … #define USBF_REG_AHBBINT … #define USBF_SYS_ERR_MASTER … #define USBF_SYS_SBUS_ERRINT0 … #define USBF_SYS_SBUS_ERRINT1 … #define USBF_SYS_MBUS_ERRINT … #define USBF_SYS_VBUS_INT … #define USBF_SYS_DMA_ENDINT_EPN(_n) … #define USBF_REG_AHBBINTEN … #define USBF_SYS_SBUS_ERRINT0EN … #define USBF_SYS_SBUS_ERRINT1EN … #define USBF_SYS_MBUS_ERRINTEN … #define USBF_SYS_VBUS_INTEN … #define USBF_SYS_DMA_ENDINTEN_EPN(_n) … #define USBF_REG_EPCTR … #define USBF_SYS_EPC_RST … #define USBF_SYS_PLL_RST … #define USBF_SYS_PLL_LOCK … #define USBF_SYS_PLL_RESUME … #define USBF_SYS_VBUS_LEVEL … #define USBF_SYS_DIRPD … #define USBF_REG_USBSSVER … #define USBF_REG_USBSSCONF … #define USBF_SYS_DMA_AVAILABLE(_n) … #define USBF_SYS_EP_AVAILABLE(_n) … #define USBF_BASE_DMA_EPN(_n) … /* EPn DMA registers offsets from Base USBF_BASE_DMA_EPN(n-1). n=1..15*/ #define USBF_REG_DMA_EPN_DCR1 … #define USBF_SYS_EPN_REQEN … #define USBF_SYS_EPN_DIR0 … #define USBF_SYS_EPN_SET_DMACNT(_c) … #define USBF_SYS_EPN_GET_DMACNT(_r) … #define USBF_REG_DMA_EPN_DCR2 … #define USBF_SYS_EPN_MPKT(_s) … #define USBF_SYS_EPN_LMPKT(_l) … #define USBF_REG_DMA_EPN_TADR … /* USB request */ struct usbf_req { … }; /* USB Endpoint */ struct usbf_ep { … }; enum usbf_ep0state { … }; struct usbf_udc { … }; struct usbf_ep_info { … }; #define USBF_SINGLE_BUFFER … #define USBF_DOUBLE_BUFFER … #define USBF_EP_INFO(_name, _caps, _base_addr, _is_double, _maxpacket_limit) … /* This table is computed from the recommended values provided in the SOC * datasheet. The buffer type (single/double) and the endpoint type cannot * be changed. The mapping in internal RAM (base_addr and number of words) * for each endpoints depends on the max packet size and the buffer type. */ static const struct usbf_ep_info usbf_ep_info[USBF_NUM_ENDPOINTS] = …; static inline u32 usbf_reg_readl(struct usbf_udc *udc, uint offset) { … } static inline void usbf_reg_writel(struct usbf_udc *udc, uint offset, u32 val) { … } static inline void usbf_reg_bitset(struct usbf_udc *udc, uint offset, u32 set) { … } static inline void usbf_reg_bitclr(struct usbf_udc *udc, uint offset, u32 clr) { … } static inline void usbf_reg_clrset(struct usbf_udc *udc, uint offset, u32 clr, u32 set) { … } static inline u32 usbf_ep_reg_readl(struct usbf_ep *ep, uint offset) { … } static inline void usbf_ep_reg_read_rep(struct usbf_ep *ep, uint offset, void *dst, uint count) { … } static inline void usbf_ep_reg_writel(struct usbf_ep *ep, uint offset, u32 val) { … } static inline void usbf_ep_reg_write_rep(struct usbf_ep *ep, uint offset, const void *src, uint count) { … } static inline void usbf_ep_reg_bitset(struct usbf_ep *ep, uint offset, u32 set) { … } static inline void usbf_ep_reg_bitclr(struct usbf_ep *ep, uint offset, u32 clr) { … } static inline void usbf_ep_reg_clrset(struct usbf_ep *ep, uint offset, u32 clr, u32 set) { … } static inline u32 usbf_ep_dma_reg_readl(struct usbf_ep *ep, uint offset) { … } static inline void usbf_ep_dma_reg_writel(struct usbf_ep *ep, uint offset, u32 val) { … } static inline void usbf_ep_dma_reg_bitset(struct usbf_ep *ep, uint offset, u32 set) { … } static inline void usbf_ep_dma_reg_bitclr(struct usbf_ep *ep, uint offset, u32 clr) { … } static void usbf_ep0_send_null(struct usbf_ep *ep0, bool is_data1) { … } static int usbf_ep0_pio_in(struct usbf_ep *ep0, struct usbf_req *req) { … } static int usbf_ep0_pio_out(struct usbf_ep *ep0, struct usbf_req *req) { … } static void usbf_ep0_fifo_flush(struct usbf_ep *ep0) { … } static void usbf_epn_send_null(struct usbf_ep *epn) { … } static void usbf_epn_send_residue(struct usbf_ep *epn, const void *buf, unsigned int size) { … } static int usbf_epn_pio_in(struct usbf_ep *epn, struct usbf_req *req) { … } static void usbf_epn_enable_in_end_int(struct usbf_ep *epn) { … } static int usbf_epn_dma_in(struct usbf_ep *epn, struct usbf_req *req) { … } static void usbf_epn_recv_residue(struct usbf_ep *epn, void *buf, unsigned int size) { … } static int usbf_epn_pio_out(struct usbf_ep *epn, struct usbf_req *req) { … } static void usbf_epn_enable_out_end_int(struct usbf_ep *epn) { … } static void usbf_epn_process_queue(struct usbf_ep *epn); static void usbf_epn_dma_out_send_dma(struct usbf_ep *epn, dma_addr_t addr, u32 npkt, bool is_short) { … } static size_t usbf_epn_dma_out_complete_dma(struct usbf_ep *epn, bool is_short) { … } static int usbf_epn_dma_out(struct usbf_ep *epn, struct usbf_req *req) { … } static void usbf_epn_dma_stop(struct usbf_ep *epn) { … } static void usbf_epn_dma_abort(struct usbf_ep *epn, struct usbf_req *req) { … } static void usbf_epn_fifo_flush(struct usbf_ep *epn) { … } static void usbf_ep_req_done(struct usbf_ep *ep, struct usbf_req *req, int status) { … } static void usbf_ep_nuke(struct usbf_ep *ep, int status) { … } static bool usbf_ep_is_stalled(struct usbf_ep *ep) { … } static int usbf_epn_start_queue(struct usbf_ep *epn) { … } static int usbf_ep_process_queue(struct usbf_ep *ep) { … } static void usbf_ep_stall(struct usbf_ep *ep, bool stall) { … } static void usbf_ep0_enable(struct usbf_ep *ep0) { … } static int usbf_epn_enable(struct usbf_ep *epn) { … } static int usbf_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) { … } static int usbf_epn_disable(struct usbf_ep *epn) { … } static int usbf_ep_disable(struct usb_ep *_ep) { … } static int usbf_ep0_queue(struct usbf_ep *ep0, struct usbf_req *req, gfp_t gfp_flags) { … } static int usbf_epn_queue(struct usbf_ep *ep, struct usbf_req *req, gfp_t gfp_flags) { … } static int usbf_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) { … } static int usbf_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) { … } static struct usb_request *usbf_ep_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) { … } static void usbf_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) { … } static int usbf_ep_set_halt(struct usb_ep *_ep, int halt) { … } static int usbf_ep_set_wedge(struct usb_ep *_ep) { … } static struct usb_ep_ops usbf_ep_ops = …; static void usbf_ep0_req_complete(struct usb_ep *_ep, struct usb_request *_req) { … } static void usbf_ep0_fill_req(struct usbf_ep *ep0, struct usbf_req *req, void *buf, unsigned int length, void (*complete)(struct usb_ep *_ep, struct usb_request *_req)) { … } static struct usbf_ep *usbf_get_ep_by_addr(struct usbf_udc *udc, u8 address) { … } static int usbf_req_delegate(struct usbf_udc *udc, const struct usb_ctrlrequest *ctrlrequest) { … } static int usbf_req_get_status(struct usbf_udc *udc, const struct usb_ctrlrequest *ctrlrequest) { … } static int usbf_req_clear_set_feature(struct usbf_udc *udc, const struct usb_ctrlrequest *ctrlrequest, bool is_set) { … } static void usbf_ep0_req_set_address_complete(struct usb_ep *_ep, struct usb_request *_req) { … } static int usbf_req_set_address(struct usbf_udc *udc, const struct usb_ctrlrequest *ctrlrequest) { … } static int usbf_req_set_configuration(struct usbf_udc *udc, const struct usb_ctrlrequest *ctrlrequest) { … } static int usbf_handle_ep0_setup(struct usbf_ep *ep0) { … } static int usbf_handle_ep0_data_status(struct usbf_ep *ep0, const char *ep0state_name, enum usbf_ep0state next_ep0state) { … } static int usbf_handle_ep0_out_status_start(struct usbf_ep *ep0) { … } static int usbf_handle_ep0_in_status_start(struct usbf_ep *ep0) { … } static void usbf_ep0_interrupt(struct usbf_ep *ep0) { … } static void usbf_epn_process_queue(struct usbf_ep *epn) { … } static void usbf_epn_interrupt(struct usbf_ep *epn) { … } static void usbf_ep_reset(struct usbf_ep *ep) { … } static void usbf_reset(struct usbf_udc *udc) { … } static void usbf_driver_suspend(struct usbf_udc *udc) { … } static void usbf_driver_resume(struct usbf_udc *udc) { … } static irqreturn_t usbf_epc_irq(int irq, void *_udc) { … } static irqreturn_t usbf_ahb_epc_irq(int irq, void *_udc) { … } static int usbf_udc_start(struct usb_gadget *gadget, struct usb_gadget_driver *driver) { … } static int usbf_udc_stop(struct usb_gadget *gadget) { … } static int usbf_get_frame(struct usb_gadget *gadget) { … } static void usbf_attach(struct usbf_udc *udc) { … } static void usbf_detach(struct usbf_udc *udc) { … } static int usbf_pullup(struct usb_gadget *gadget, int is_on) { … } static int usbf_udc_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered) { … } static int usbf_udc_wakeup(struct usb_gadget *gadget) { … } static struct usb_gadget_ops usbf_gadget_ops = …; static int usbf_epn_check(struct usbf_ep *epn) { … } static int usbf_probe(struct platform_device *pdev) { … } static void usbf_remove(struct platform_device *pdev) { … } static const struct of_device_id usbf_match[] = …; MODULE_DEVICE_TABLE(of, usbf_match); static struct platform_driver udc_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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