| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Magnus Damm | 13672 | 91.65% | 2 | 3.57% |
| Alexis Lothoré | 241 | 1.62% | 5 | 8.93% |
| Haneen Mohammed | 228 | 1.53% | 3 | 5.36% |
| Robert Baldyga | 200 | 1.34% | 2 | 3.57% |
| Arnd Bergmann | 127 | 0.85% | 2 | 3.57% |
| Chris Rorvick | 63 | 0.42% | 1 | 1.79% |
| Carmeli Tamir | 59 | 0.40% | 3 | 5.36% |
| Ebru Akagunduz | 39 | 0.26% | 2 | 3.57% |
| Saiyam Doshi | 38 | 0.25% | 1 | 1.79% |
| Ravi Teja Darbha | 38 | 0.25% | 2 | 3.57% |
| Cristina Moraru | 38 | 0.25% | 1 | 1.79% |
| Nishad Kamdar | 32 | 0.21% | 1 | 1.79% |
| Peter Chen | 25 | 0.17% | 2 | 3.57% |
| Afonso Bordado | 23 | 0.15% | 4 | 7.14% |
| Javier F. Arias | 21 | 0.14% | 1 | 1.79% |
| Geliang Tang | 10 | 0.07% | 1 | 1.79% |
| Payal Kshirsagar | 9 | 0.06% | 1 | 1.79% |
| Gargi Sharma | 8 | 0.05% | 1 | 1.79% |
| Roberta Dobrescu | 7 | 0.05% | 2 | 3.57% |
| Tapasweni Pathak | 7 | 0.05% | 2 | 3.57% |
| Luis de Bethencourt | 5 | 0.03% | 1 | 1.79% |
| Somya Anand | 5 | 0.03% | 1 | 1.79% |
| Sachin Kamat | 3 | 0.02% | 1 | 1.79% |
| Vincenzo Scotti | 3 | 0.02% | 1 | 1.79% |
| Aya Mahfouz | 2 | 0.01% | 1 | 1.79% |
| Yue haibing | 2 | 0.01% | 1 | 1.79% |
| Shyam Saini | 2 | 0.01% | 1 | 1.79% |
| Greg Kroah-Hartman | 2 | 0.01% | 2 | 3.57% |
| Masanari Iida | 2 | 0.01% | 1 | 1.79% |
| Sandhya Bankar | 1 | 0.01% | 1 | 1.79% |
| Cristian Sicilia | 1 | 0.01% | 1 | 1.79% |
| Bhumika Goyal | 1 | 0.01% | 1 | 1.79% |
| KANG Yuxuan | 1 | 0.01% | 1 | 1.79% |
| Anson Jacob | 1 | 0.01% | 1 | 1.79% |
| Carlos E. Garcia | 1 | 0.01% | 1 | 1.79% |
| Nadim Almas | 1 | 0.01% | 1 | 1.79% |
| Total | 14918 | 56 |
// SPDX-License-Identifier: GPL-2.0 /* * drivers/usb/gadget/emxx_udc.c * EMXX FCD (Function Controller Driver) for USB. * * Copyright (C) 2010 Renesas Electronics Corporation */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/delay.h> #include <linux/ioport.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/list.h> #include <linux/interrupt.h> #include <linux/proc_fs.h> #include <linux/clk.h> #include <linux/ctype.h> #include <linux/string.h> #include <linux/dma-mapping.h> #include <linux/workqueue.h> #include <linux/device.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> #include <linux/irq.h> #include <linux/gpio/consumer.h> #include "emxx_udc.h" #define DRIVER_DESC "EMXX UDC driver" #define DMA_ADDR_INVALID (~(dma_addr_t)0) static const char driver_name[] = "emxx_udc"; static const char driver_desc[] = DRIVER_DESC; /*===========================================================================*/ /* Prototype */ static void _nbu2ss_ep_dma_abort(struct nbu2ss_udc *, struct nbu2ss_ep *); static void _nbu2ss_ep0_enable(struct nbu2ss_udc *); /*static void _nbu2ss_ep0_disable(struct nbu2ss_udc *);*/ static void _nbu2ss_ep_done(struct nbu2ss_ep *, struct nbu2ss_req *, int); static void _nbu2ss_set_test_mode(struct nbu2ss_udc *, u32 mode); static void _nbu2ss_endpoint_toggle_reset(struct nbu2ss_udc *udc, u8 ep_adrs); static int _nbu2ss_pullup(struct nbu2ss_udc *, int); static void _nbu2ss_fifo_flush(struct nbu2ss_udc *, struct nbu2ss_ep *); /*===========================================================================*/ /* Macro */ #define _nbu2ss_zero_len_pkt(udc, epnum) \ _nbu2ss_ep_in_end(udc, epnum, 0, 0) /*===========================================================================*/ /* Global */ static struct nbu2ss_udc udc_controller; /*-------------------------------------------------------------------------*/ /* Read */ static inline u32 _nbu2ss_readl(void __iomem *address) { return __raw_readl(address); } /*-------------------------------------------------------------------------*/ /* Write */ static inline void _nbu2ss_writel(void __iomem *address, u32 udata) { __raw_writel(udata, address); } /*-------------------------------------------------------------------------*/ /* Set Bit */ static inline void _nbu2ss_bitset(void __iomem *address, u32 udata) { u32 reg_dt = __raw_readl(address) | (udata); __raw_writel(reg_dt, address); } /*-------------------------------------------------------------------------*/ /* Clear Bit */ static inline void _nbu2ss_bitclr(void __iomem *address, u32 udata) { u32 reg_dt = __raw_readl(address) & ~(udata); __raw_writel(reg_dt, address); } #ifdef UDC_DEBUG_DUMP /*-------------------------------------------------------------------------*/ static void _nbu2ss_dump_register(struct nbu2ss_udc *udc) { int i; u32 reg_data; pr_info("=== %s()\n", __func__); if (!udc) { pr_err("%s udc == NULL\n", __func__); return; } spin_unlock(&udc->lock); dev_dbg(&udc->dev, "\n-USB REG-\n"); for (i = 0x0 ; i < USB_BASE_SIZE ; i += 16) { reg_data = _nbu2ss_readl(IO_ADDRESS(USB_BASE_ADDRESS + i)); dev_dbg(&udc->dev, "USB%04x =%08x", i, (int)reg_data); reg_data = _nbu2ss_readl(IO_ADDRESS(USB_BASE_ADDRESS + i + 4)); dev_dbg(&udc->dev, " %08x", (int)reg_data); reg_data = _nbu2ss_readl(IO_ADDRESS(USB_BASE_ADDRESS + i + 8)); dev_dbg(&udc->dev, " %08x", (int)reg_data); reg_data = _nbu2ss_readl(IO_ADDRESS(USB_BASE_ADDRESS + i + 12)); dev_dbg(&udc->dev, " %08x\n", (int)reg_data); } spin_lock(&udc->lock); } #endif /* UDC_DEBUG_DUMP */ /*-------------------------------------------------------------------------*/ /* Endpoint 0 Callback (Complete) */ static void _nbu2ss_ep0_complete(struct usb_ep *_ep, struct usb_request *_req) { u8 recipient; u16 selector; u16 wIndex; u32 test_mode; struct usb_ctrlrequest *p_ctrl; struct nbu2ss_udc *udc; if (!_ep || !_req) return; udc = (struct nbu2ss_udc *)_req->context; p_ctrl = &udc->ctrl; if ((p_ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { if (p_ctrl->bRequest == USB_REQ_SET_FEATURE) { /*-------------------------------------------------*/ /* SET_FEATURE */ recipient = (u8)(p_ctrl->bRequestType & USB_RECIP_MASK); selector = le16_to_cpu(p_ctrl->wValue); if ((recipient == USB_RECIP_DEVICE) && (selector == USB_DEVICE_TEST_MODE)) { wIndex = le16_to_cpu(p_ctrl->wIndex); test_mode = (u32)(wIndex >> 8); _nbu2ss_set_test_mode(udc, test_mode); } } } } /*-------------------------------------------------------------------------*/ /* Initialization usb_request */ static void _nbu2ss_create_ep0_packet(struct nbu2ss_udc *udc, void *p_buf, unsigned int length) { udc->ep0_req.req.buf = p_buf; udc->ep0_req.req.length = length; udc->ep0_req.req.dma = 0; udc->ep0_req.req.zero = true; udc->ep0_req.req.complete = _nbu2ss_ep0_complete; udc->ep0_req.req.status = -EINPROGRESS; udc->ep0_req.req.context = udc; udc->ep0_req.req.actual = 0; } /*-------------------------------------------------------------------------*/ /* Acquisition of the first address of RAM(FIFO) */ static u32 _nbu2ss_get_begin_ram_address(struct nbu2ss_udc *udc) { u32 num, buf_type; u32 data, last_ram_adr, use_ram_size; struct ep_regs __iomem *p_ep_regs; last_ram_adr = (D_RAM_SIZE_CTRL / sizeof(u32)) * 2; use_ram_size = 0; for (num = 0; num < NUM_ENDPOINTS - 1; num++) { p_ep_regs = &udc->p_regs->EP_REGS[num]; data = _nbu2ss_readl(&p_ep_regs->EP_PCKT_ADRS); buf_type = _nbu2ss_readl(&p_ep_regs->EP_CONTROL) & EPN_BUF_TYPE; if (buf_type == 0) { /* Single Buffer */ use_ram_size += (data & EPN_MPKT) / sizeof(u32); } else { /* Double Buffer */ use_ram_size += ((data & EPN_MPKT) / sizeof(u32)) * 2; } if ((data >> 16) > last_ram_adr) last_ram_adr = data >> 16; } return last_ram_adr + use_ram_size; } /*-------------------------------------------------------------------------*/ /* Construction of Endpoint */ static int _nbu2ss_ep_init(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep) { u32 num; u32 data; u32 begin_adrs; if (ep->epnum == 0) return -EINVAL; num = ep->epnum - 1; /*-------------------------------------------------------------*/ /* RAM Transfer Address */ begin_adrs = _nbu2ss_get_begin_ram_address(udc); data = (begin_adrs << 16) | ep->ep.maxpacket; _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_PCKT_ADRS, data); /*-------------------------------------------------------------*/ /* Interrupt Enable */ data = 1 << (ep->epnum + 8); _nbu2ss_bitset(&udc->p_regs->USB_INT_ENA, data); /*-------------------------------------------------------------*/ /* Endpoint Type(Mode) */ /* Bulk, Interrupt, ISO */ switch (ep->ep_type) { case USB_ENDPOINT_XFER_BULK: data = EPN_BULK; break; case USB_ENDPOINT_XFER_INT: data = EPN_BUF_SINGLE | EPN_INTERRUPT; break; case USB_ENDPOINT_XFER_ISOC: data = EPN_ISO; break; default: data = 0; break; } _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); _nbu2ss_endpoint_toggle_reset(udc, (ep->epnum | ep->direct)); if (ep->direct == USB_DIR_OUT) { /*---------------------------------------------------------*/ /* OUT */ data = EPN_EN | EPN_BCLR | EPN_DIR0; _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); data = EPN_ONAK | EPN_OSTL_EN | EPN_OSTL; _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); data = EPN_OUT_EN | EPN_OUT_END_EN; _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data); } else { /*---------------------------------------------------------*/ /* IN */ data = EPN_EN | EPN_BCLR | EPN_AUTO; _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); data = EPN_ISTL; _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); data = EPN_IN_EN | EPN_IN_END_EN; _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data); } return 0; } /*-------------------------------------------------------------------------*/ /* Release of Endpoint */ static int _nbu2ss_epn_exit(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep) { u32 num; u32 data; if ((ep->epnum == 0) || (udc->vbus_active == 0)) return -EINVAL; num = ep->epnum - 1; /*-------------------------------------------------------------*/ /* RAM Transfer Address */ _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_PCKT_ADRS, 0); /*-------------------------------------------------------------*/ /* Interrupt Disable */ data = 1 << (ep->epnum + 8); _nbu2ss_bitclr(&udc->p_regs->USB_INT_ENA, data); if (ep->direct == USB_DIR_OUT) { /*---------------------------------------------------------*/ /* OUT */ data = EPN_ONAK | EPN_BCLR; _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); data = EPN_EN | EPN_DIR0; _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); data = EPN_OUT_EN | EPN_OUT_END_EN; _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data); } else { /*---------------------------------------------------------*/ /* IN */ data = EPN_BCLR; _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); data = EPN_EN | EPN_AUTO; _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); data = EPN_IN_EN | EPN_IN_END_EN; _nbu2ss_bitclr(&udc->p_regs->EP_REGS[num].EP_INT_ENA, data); } return 0; } /*-------------------------------------------------------------------------*/ /* DMA setting (without Endpoint 0) */ static void _nbu2ss_ep_dma_init(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep) { u32 num; u32 data; data = _nbu2ss_readl(&udc->p_regs->USBSSCONF); if (((ep->epnum == 0) || (data & (1 << ep->epnum)) == 0)) return; /* Not Support DMA */ num = ep->epnum - 1; if (ep->direct == USB_DIR_OUT) { /*---------------------------------------------------------*/ /* OUT */ data = ep->ep.maxpacket; _nbu2ss_writel(&udc->p_regs->EP_DCR[num].EP_DCR2, data); /*---------------------------------------------------------*/ /* Transfer Direct */ data = DCR1_EPN_DIR0; _nbu2ss_bitset(&udc->p_regs->EP_DCR[num].EP_DCR1, data); /*---------------------------------------------------------*/ /* DMA Mode etc. */ data = EPN_STOP_MODE | EPN_STOP_SET | EPN_DMAMODE0; _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_DMA_CTRL, data); } else { /*---------------------------------------------------------*/ /* IN */ _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, EPN_AUTO); /*---------------------------------------------------------*/ /* DMA Mode etc. */ data = EPN_BURST_SET | EPN_DMAMODE0; _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_DMA_CTRL, data); } } /*-------------------------------------------------------------------------*/ /* DMA setting release */ static void _nbu2ss_ep_dma_exit(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep) { u32 num; u32 data; struct fc_regs __iomem *preg = udc->p_regs; if (udc->vbus_active == 0) return; /* VBUS OFF */ data = _nbu2ss_readl(&preg->USBSSCONF); if ((ep->epnum == 0) || ((data & (1 << ep->epnum)) == 0)) return; /* Not Support DMA */ num = ep->epnum - 1; _nbu2ss_ep_dma_abort(udc, ep); if (ep->direct == USB_DIR_OUT) { /*---------------------------------------------------------*/ /* OUT */ _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, 0); _nbu2ss_bitclr(&preg->EP_DCR[num].EP_DCR1, DCR1_EPN_DIR0); _nbu2ss_writel(&preg->EP_REGS[num].EP_DMA_CTRL, 0); } else { /*---------------------------------------------------------*/ /* IN */ _nbu2ss_bitclr(&preg->EP_REGS[num].EP_CONTROL, EPN_AUTO); _nbu2ss_writel(&preg->EP_REGS[num].EP_DMA_CTRL, 0); } } /*-------------------------------------------------------------------------*/ /* Abort DMA */ static void _nbu2ss_ep_dma_abort(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep) { struct fc_regs __iomem *preg = udc->p_regs; _nbu2ss_bitclr(&preg->EP_DCR[ep->epnum - 1].EP_DCR1, DCR1_EPN_REQEN); mdelay(DMA_DISABLE_TIME); /* DCR1_EPN_REQEN Clear */ _nbu2ss_bitclr(&preg->EP_REGS[ep->epnum - 1].EP_DMA_CTRL, EPN_DMA_EN); } /*-------------------------------------------------------------------------*/ /* Start IN Transfer */ static void _nbu2ss_ep_in_end(struct nbu2ss_udc *udc, u32 epnum, u32 data32, u32 length) { u32 data; u32 num; struct fc_regs __iomem *preg = udc->p_regs; if (length >= sizeof(u32)) return; if (epnum == 0) { _nbu2ss_bitclr(&preg->EP0_CONTROL, EP0_AUTO); /* Writing of 1-4 bytes */ if (length) _nbu2ss_writel(&preg->EP0_WRITE, data32); data = ((length << 5) & EP0_DW) | EP0_DEND; _nbu2ss_writel(&preg->EP0_CONTROL, data); _nbu2ss_bitset(&preg->EP0_CONTROL, EP0_AUTO); } else { num = epnum - 1; _nbu2ss_bitclr(&preg->EP_REGS[num].EP_CONTROL, EPN_AUTO); /* Writing of 1-4 bytes */ if (length) _nbu2ss_writel(&preg->EP_REGS[num].EP_WRITE, data32); data = (((length) << 5) & EPN_DW) | EPN_DEND; _nbu2ss_bitset(&preg->EP_REGS[num].EP_CONTROL, data); _nbu2ss_bitset(&preg->EP_REGS[num].EP_CONTROL, EPN_AUTO); } } #ifdef USE_DMA /*-------------------------------------------------------------------------*/ static void _nbu2ss_dma_map_single(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req, u8 direct) { if (req->req.dma == DMA_ADDR_INVALID) { if (req->unaligned) { req->req.dma = ep->phys_buf; } else { req->req.dma = dma_map_single(udc->gadget.dev.parent, req->req.buf, req->req.length, (direct == USB_DIR_IN) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); } req->mapped = 1; } else { if (!req->unaligned) dma_sync_single_for_device(udc->gadget.dev.parent, req->req.dma, req->req.length, (direct == USB_DIR_IN) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); req->mapped = 0; } } /*-------------------------------------------------------------------------*/ static void _nbu2ss_dma_unmap_single(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req, u8 direct) { u8 data[4]; u8 *p; u32 count = 0; if (direct == USB_DIR_OUT) { count = req->req.actual % 4; if (count) { p = req->req.buf; p += (req->req.actual - count); memcpy(data, p, count); } } if (req->mapped) { if (req->unaligned) { if (direct == USB_DIR_OUT) memcpy(req->req.buf, ep->virt_buf, req->req.actual & 0xfffffffc); } else { dma_unmap_single(udc->gadget.dev.parent, req->req.dma, req->req.length, (direct == USB_DIR_IN) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); } req->req.dma = DMA_ADDR_INVALID; req->mapped = 0; } else { if (!req->unaligned) dma_sync_single_for_cpu(udc->gadget.dev.parent, req->req.dma, req->req.length, (direct == USB_DIR_IN) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); } if (count) { p = req->req.buf; p += (req->req.actual - count); memcpy(p, data, count); } } #endif /*-------------------------------------------------------------------------*/ /* Endpoint 0 OUT Transfer (PIO) */ static int ep0_out_pio(struct nbu2ss_udc *udc, u8 *buf, u32 length) { u32 i; u32 numreads = length / sizeof(u32); union usb_reg_access *buf32 = (union usb_reg_access *)buf; if (!numreads) return 0; /* PIO Read */ for (i = 0; i < numreads; i++) { buf32->dw = _nbu2ss_readl(&udc->p_regs->EP0_READ); buf32++; } return numreads * sizeof(u32); } /*-------------------------------------------------------------------------*/ /* Endpoint 0 OUT Transfer (PIO, OverBytes) */ static int ep0_out_overbytes(struct nbu2ss_udc *udc, u8 *p_buf, u32 length) { u32 i; u32 i_read_size = 0; union usb_reg_access temp_32; union usb_reg_access *p_buf_32 = (union usb_reg_access *)p_buf; if ((length > 0) && (length < sizeof(u32))) { temp_32.dw = _nbu2ss_readl(&udc->p_regs->EP0_READ); for (i = 0 ; i < length ; i++) p_buf_32->byte.DATA[i] = temp_32.byte.DATA[i]; i_read_size += length; } return i_read_size; } /*-------------------------------------------------------------------------*/ /* Endpoint 0 IN Transfer (PIO) */ static int EP0_in_PIO(struct nbu2ss_udc *udc, u8 *p_buf, u32 length) { u32 i; u32 i_max_length = EP0_PACKETSIZE; u32 i_word_length = 0; u32 i_write_length = 0; union usb_reg_access *p_buf_32 = (union usb_reg_access *)p_buf; /*------------------------------------------------------------*/ /* Transfer Length */ if (i_max_length < length) i_word_length = i_max_length / sizeof(u32); else i_word_length = length / sizeof(u32); /*------------------------------------------------------------*/ /* PIO */ for (i = 0; i < i_word_length; i++) { _nbu2ss_writel(&udc->p_regs->EP0_WRITE, p_buf_32->dw); p_buf_32++; i_write_length += sizeof(u32); } return i_write_length; } /*-------------------------------------------------------------------------*/ /* Endpoint 0 IN Transfer (PIO, OverBytes) */ static int ep0_in_overbytes(struct nbu2ss_udc *udc, u8 *p_buf, u32 i_remain_size) { u32 i; union usb_reg_access temp_32; union usb_reg_access *p_buf_32 = (union usb_reg_access *)p_buf; if ((i_remain_size > 0) && (i_remain_size < sizeof(u32))) { for (i = 0 ; i < i_remain_size ; i++) temp_32.byte.DATA[i] = p_buf_32->byte.DATA[i]; _nbu2ss_ep_in_end(udc, 0, temp_32.dw, i_remain_size); return i_remain_size; } return 0; } /*-------------------------------------------------------------------------*/ /* Transfer NULL Packet (Epndoint 0) */ static int EP0_send_NULL(struct nbu2ss_udc *udc, bool pid_flag) { u32 data; data = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL); data &= ~(u32)EP0_INAK; if (pid_flag) data |= (EP0_INAK_EN | EP0_PIDCLR | EP0_DEND); else data |= (EP0_INAK_EN | EP0_DEND); _nbu2ss_writel(&udc->p_regs->EP0_CONTROL, data); return 0; } /*-------------------------------------------------------------------------*/ /* Receive NULL Packet (Endpoint 0) */ static int EP0_receive_NULL(struct nbu2ss_udc *udc, bool pid_flag) { u32 data; data = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL); data &= ~(u32)EP0_ONAK; if (pid_flag) data |= EP0_PIDCLR; _nbu2ss_writel(&udc->p_regs->EP0_CONTROL, data); return 0; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_ep0_in_transfer(struct nbu2ss_udc *udc, struct nbu2ss_req *req) { u8 *p_buffer; /* IN Data Buffer */ u32 data; u32 i_remain_size = 0; int result = 0; /*-------------------------------------------------------------*/ /* End confirmation */ if (req->req.actual == req->req.length) { if ((req->req.actual % EP0_PACKETSIZE) == 0) { if (req->zero) { req->zero = false; EP0_send_NULL(udc, false); return 1; } } return 0; /* Transfer End */ } /*-------------------------------------------------------------*/ /* NAK release */ data = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL); data |= EP0_INAK_EN; data &= ~(u32)EP0_INAK; _nbu2ss_writel(&udc->p_regs->EP0_CONTROL, data); i_remain_size = req->req.length - req->req.actual; p_buffer = (u8 *)req->req.buf; p_buffer += req->req.actual; /*-------------------------------------------------------------*/ /* Data transfer */ result = EP0_in_PIO(udc, p_buffer, i_remain_size); req->div_len = result; i_remain_size -= result; if (i_remain_size == 0) { EP0_send_NULL(udc, false); return result; } if ((i_remain_size < sizeof(u32)) && (result != EP0_PACKETSIZE)) { p_buffer += result; result += ep0_in_overbytes(udc, p_buffer, i_remain_size); req->div_len = result; } return result; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_ep0_out_transfer(struct nbu2ss_udc *udc, struct nbu2ss_req *req) { u8 *p_buffer; u32 i_remain_size; u32 i_recv_length; int result = 0; int f_rcv_zero; /*-------------------------------------------------------------*/ /* Receive data confirmation */ i_recv_length = _nbu2ss_readl(&udc->p_regs->EP0_LENGTH) & EP0_LDATA; if (i_recv_length != 0) { f_rcv_zero = 0; i_remain_size = req->req.length - req->req.actual; p_buffer = (u8 *)req->req.buf; p_buffer += req->req.actual; result = ep0_out_pio(udc, p_buffer , min(i_remain_size, i_recv_length)); if (result < 0) return result; req->req.actual += result; i_recv_length -= result; if ((i_recv_length > 0) && (i_recv_length < sizeof(u32))) { p_buffer += result; i_remain_size -= result; result = ep0_out_overbytes(udc, p_buffer , min(i_remain_size, i_recv_length)); req->req.actual += result; } } else { f_rcv_zero = 1; } /*-------------------------------------------------------------*/ /* End confirmation */ if (req->req.actual == req->req.length) { if ((req->req.actual % EP0_PACKETSIZE) == 0) { if (req->zero) { req->zero = false; EP0_receive_NULL(udc, false); return 1; } } return 0; /* Transfer End */ } if ((req->req.actual % EP0_PACKETSIZE) != 0) return 0; /* Short Packet Transfer End */ if (req->req.actual > req->req.length) { dev_err(udc->dev, " *** Overrun Error\n"); return -EOVERFLOW; } if (f_rcv_zero != 0) { i_remain_size = _nbu2ss_readl(&udc->p_regs->EP0_CONTROL); if (i_remain_size & EP0_ONAK) { /*---------------------------------------------------*/ /* NACK release */ _nbu2ss_bitclr(&udc->p_regs->EP0_CONTROL, EP0_ONAK); } result = 1; } return result; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_out_dma(struct nbu2ss_udc *udc, struct nbu2ss_req *req, u32 num, u32 length) { dma_addr_t p_buffer; u32 mpkt; u32 lmpkt; u32 dmacnt; u32 burst = 1; u32 data; int result = -EINVAL; struct fc_regs __iomem *preg = udc->p_regs; if (req->dma_flag) return 1; /* DMA is forwarded */ req->dma_flag = true; p_buffer = req->req.dma; p_buffer += req->req.actual; /* DMA Address */ _nbu2ss_writel(&preg->EP_DCR[num].EP_TADR, (u32)p_buffer); /* Number of transfer packets */ mpkt = _nbu2ss_readl(&preg->EP_REGS[num].EP_PCKT_ADRS) & EPN_MPKT; dmacnt = length / mpkt; lmpkt = (length % mpkt) & ~(u32)0x03; if (dmacnt > DMA_MAX_COUNT) { dmacnt = DMA_MAX_COUNT; lmpkt = 0; } else if (lmpkt != 0) { if (dmacnt == 0) burst = 0; /* Burst OFF */ dmacnt++; } data = mpkt | (lmpkt << 16); _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, data); data = ((dmacnt & 0xff) << 16) | DCR1_EPN_DIR0 | DCR1_EPN_REQEN; _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR1, data); if (burst == 0) { _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT, 0); _nbu2ss_bitclr(&preg->EP_REGS[num].EP_DMA_CTRL, EPN_BURST_SET); } else { _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT , (dmacnt << 16)); _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPN_BURST_SET); } _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPN_DMA_EN); result = length & ~(u32)0x03; req->div_len = result; return result; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_epn_out_pio(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req, u32 length) { u8 *p_buffer; u32 i; u32 data; u32 i_word_length; union usb_reg_access temp_32; union usb_reg_access *p_buf_32; int result = 0; struct fc_regs __iomem *preg = udc->p_regs; if (req->dma_flag) return 1; /* DMA is forwarded */ if (length == 0) return 0; p_buffer = (u8 *)req->req.buf; p_buf_32 = (union usb_reg_access *)(p_buffer + req->req.actual); i_word_length = length / sizeof(u32); if (i_word_length > 0) { /*---------------------------------------------------------*/ /* Copy of every four bytes */ for (i = 0; i < i_word_length; i++) { p_buf_32->dw = _nbu2ss_readl(&preg->EP_REGS[ep->epnum - 1].EP_READ); p_buf_32++; } result = i_word_length * sizeof(u32); } data = length - result; if (data > 0) { /*---------------------------------------------------------*/ /* Copy of fraction byte */ temp_32.dw = _nbu2ss_readl(&preg->EP_REGS[ep->epnum - 1].EP_READ); for (i = 0 ; i < data ; i++) p_buf_32->byte.DATA[i] = temp_32.byte.DATA[i]; result += data; } req->req.actual += result; if ((req->req.actual == req->req.length) || ((req->req.actual % ep->ep.maxpacket) != 0)) { result = 0; } return result; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_epn_out_data(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req, u32 data_size) { u32 num; u32 i_buf_size; int nret = 1; if (ep->epnum == 0) return -EINVAL; num = ep->epnum - 1; i_buf_size = min((req->req.length - req->req.actual), data_size); if ((ep->ep_type != USB_ENDPOINT_XFER_INT) && (req->req.dma != 0) && (i_buf_size >= sizeof(u32))) { nret = _nbu2ss_out_dma(udc, req, num, i_buf_size); } else { i_buf_size = min_t(u32, i_buf_size, ep->ep.maxpacket); nret = _nbu2ss_epn_out_pio(udc, ep, req, i_buf_size); } return nret; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_epn_out_transfer(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req) { u32 num; u32 i_recv_length; int result = 1; struct fc_regs __iomem *preg = udc->p_regs; if (ep->epnum == 0) return -EINVAL; num = ep->epnum - 1; /*-------------------------------------------------------------*/ /* Receive Length */ i_recv_length = _nbu2ss_readl(&preg->EP_REGS[num].EP_LEN_DCNT) & EPN_LDATA; if (i_recv_length != 0) { result = _nbu2ss_epn_out_data(udc, ep, req, i_recv_length); if (i_recv_length < ep->ep.maxpacket) { if (i_recv_length == result) { req->req.actual += result; result = 0; } } } else { if ((req->req.actual == req->req.length) || ((req->req.actual % ep->ep.maxpacket) != 0)) { result = 0; } } if (result == 0) { if ((req->req.actual % ep->ep.maxpacket) == 0) { if (req->zero) { req->zero = false; return 1; } } } if (req->req.actual > req->req.length) { dev_err(udc->dev, " Overrun Error\n"); dev_err(udc->dev, " actual = %d, length = %d\n", req->req.actual, req->req.length); result = -EOVERFLOW; } return result; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_in_dma(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req, u32 num, u32 length) { dma_addr_t p_buffer; u32 mpkt; /* MaxPacketSize */ u32 lmpkt; /* Last Packet Data Size */ u32 dmacnt; /* IN Data Size */ u32 i_write_length; u32 data; int result = -EINVAL; struct fc_regs __iomem *preg = udc->p_regs; if (req->dma_flag) return 1; /* DMA is forwarded */ #ifdef USE_DMA if (req->req.actual == 0) _nbu2ss_dma_map_single(udc, ep, req, USB_DIR_IN); #endif req->dma_flag = true; /* MAX Packet Size */ mpkt = _nbu2ss_readl(&preg->EP_REGS[num].EP_PCKT_ADRS) & EPN_MPKT; if ((DMA_MAX_COUNT * mpkt) < length) i_write_length = DMA_MAX_COUNT * mpkt; else i_write_length = length; /*------------------------------------------------------------*/ /* Number of transmission packets */ if (mpkt < i_write_length) { dmacnt = i_write_length / mpkt; lmpkt = (i_write_length % mpkt) & ~(u32)0x3; if (lmpkt != 0) dmacnt++; else lmpkt = mpkt & ~(u32)0x3; } else { dmacnt = 1; lmpkt = i_write_length & ~(u32)0x3; } /* Packet setting */ data = mpkt | (lmpkt << 16); _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR2, data); /* Address setting */ p_buffer = req->req.dma; p_buffer += req->req.actual; _nbu2ss_writel(&preg->EP_DCR[num].EP_TADR, (u32)p_buffer); /* Packet and DMA setting */ data = ((dmacnt & 0xff) << 16) | DCR1_EPN_REQEN; _nbu2ss_writel(&preg->EP_DCR[num].EP_DCR1, data); /* Packet setting of EPC */ data = dmacnt << 16; _nbu2ss_writel(&preg->EP_REGS[num].EP_LEN_DCNT, data); /*DMA setting of EPC */ _nbu2ss_bitset(&preg->EP_REGS[num].EP_DMA_CTRL, EPN_DMA_EN); result = i_write_length & ~(u32)0x3; req->div_len = result; return result; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_epn_in_pio(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req, u32 length) { u8 *p_buffer; u32 i; u32 data; u32 i_word_length; union usb_reg_access temp_32; union usb_reg_access *p_buf_32 = NULL; int result = 0; struct fc_regs __iomem *preg = udc->p_regs; if (req->dma_flag) return 1; /* DMA is forwarded */ if (length > 0) { p_buffer = (u8 *)req->req.buf; p_buf_32 = (union usb_reg_access *)(p_buffer + req->req.actual); i_word_length = length / sizeof(u32); if (i_word_length > 0) { for (i = 0; i < i_word_length; i++) { _nbu2ss_writel( &preg->EP_REGS[ep->epnum - 1].EP_WRITE, p_buf_32->dw); p_buf_32++; } result = i_word_length * sizeof(u32); } } if (result != ep->ep.maxpacket) { data = length - result; temp_32.dw = 0; for (i = 0 ; i < data ; i++) temp_32.byte.DATA[i] = p_buf_32->byte.DATA[i]; _nbu2ss_ep_in_end(udc, ep->epnum, temp_32.dw, data); result += data; } req->div_len = result; return result; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_epn_in_data(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req, u32 data_size) { u32 num; int nret = 1; if (ep->epnum == 0) return -EINVAL; num = ep->epnum - 1; if ((ep->ep_type != USB_ENDPOINT_XFER_INT) && (req->req.dma != 0) && (data_size >= sizeof(u32))) { nret = _nbu2ss_in_dma(udc, ep, req, num, data_size); } else { data_size = min_t(u32, data_size, ep->ep.maxpacket); nret = _nbu2ss_epn_in_pio(udc, ep, req, data_size); } return nret; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_epn_in_transfer(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req) { u32 num; u32 i_buf_size; int result = 0; u32 status; if (ep->epnum == 0) return -EINVAL; num = ep->epnum - 1; status = _nbu2ss_readl(&udc->p_regs->EP_REGS[num].EP_STATUS); /*-------------------------------------------------------------*/ /* State confirmation of FIFO */ if (req->req.actual == 0) { if ((status & EPN_IN_EMPTY) == 0) return 1; /* Not Empty */ } else { if ((status & EPN_IN_FULL) != 0) return 1; /* Not Empty */ } /*-------------------------------------------------------------*/ /* Start transfer */ i_buf_size = req->req.length - req->req.actual; if (i_buf_size > 0) result = _nbu2ss_epn_in_data(udc, ep, req, i_buf_size); else if (req->req.length == 0) _nbu2ss_zero_len_pkt(udc, ep->epnum); return result; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_start_transfer(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req, bool bflag) { int nret = -EINVAL; req->dma_flag = false; req->div_len = 0; if (req->req.length == 0) { req->zero = false; } else { if ((req->req.length % ep->ep.maxpacket) == 0) req->zero = req->req.zero; else req->zero = false; } if (ep->epnum == 0) { /* EP0 */ switch (udc->ep0state) { case EP0_IN_DATA_PHASE: nret = _nbu2ss_ep0_in_transfer(udc, req); break; case EP0_OUT_DATA_PHASE: nret = _nbu2ss_ep0_out_transfer(udc, req); break; case EP0_IN_STATUS_PHASE: nret = EP0_send_NULL(udc, true); break; default: break; } } else { /* EPN */ if (ep->direct == USB_DIR_OUT) { /* OUT */ if (!bflag) nret = _nbu2ss_epn_out_transfer(udc, ep, req); } else { /* IN */ nret = _nbu2ss_epn_in_transfer(udc, ep, req); } } return nret; } /*-------------------------------------------------------------------------*/ static void _nbu2ss_restert_transfer(struct nbu2ss_ep *ep) { u32 length; bool bflag = false; struct nbu2ss_req *req; req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue); if (!req) return; if (ep->epnum > 0) { length = _nbu2ss_readl( &ep->udc->p_regs->EP_REGS[ep->epnum - 1].EP_LEN_DCNT); length &= EPN_LDATA; if (length < ep->ep.maxpacket) bflag = true; } _nbu2ss_start_transfer(ep->udc, ep, req, bflag); } /*-------------------------------------------------------------------------*/ /* Endpoint Toggle Reset */ static void _nbu2ss_endpoint_toggle_reset(struct nbu2ss_udc *udc, u8 ep_adrs) { u8 num; u32 data; if ((ep_adrs == 0) || (ep_adrs == 0x80)) return; num = (ep_adrs & 0x7F) - 1; if (ep_adrs & USB_DIR_IN) data = EPN_IPIDCLR; else data = EPN_BCLR | EPN_OPIDCLR; _nbu2ss_bitset(&udc->p_regs->EP_REGS[num].EP_CONTROL, data); } /*-------------------------------------------------------------------------*/ /* Endpoint STALL set */ static void _nbu2ss_set_endpoint_stall(struct nbu2ss_udc *udc, u8 ep_adrs, bool bstall) { u8 num, epnum; u32 data; struct nbu2ss_ep *ep; struct fc_regs __iomem *preg = udc->p_regs; if ((ep_adrs == 0) || (ep_adrs == 0x80)) { if (bstall) { /* Set STALL */ _nbu2ss_bitset(&preg->EP0_CONTROL, EP0_STL); } else { /* Clear STALL */ _nbu2ss_bitclr(&preg->EP0_CONTROL, EP0_STL); } } else { epnum = ep_adrs & USB_ENDPOINT_NUMBER_MASK; num = epnum - 1; ep = &udc->ep[epnum]; if (bstall) { /* Set STALL */ ep->halted = true; if (ep_adrs & USB_DIR_IN) data = EPN_BCLR | EPN_ISTL; else data = EPN_OSTL_EN | EPN_OSTL; _nbu2ss_bitset(&preg->EP_REGS[num].EP_CONTROL, data); } else { /* Clear STALL */ ep->stalled = false; if (ep_adrs & USB_DIR_IN) { _nbu2ss_bitclr(&preg->EP_REGS[num].EP_CONTROL , EPN_ISTL); } else { data = _nbu2ss_readl(&preg->EP_REGS[num].EP_CONTROL); data &= ~EPN_OSTL; data |= EPN_OSTL_EN; _nbu2ss_writel(&preg->EP_REGS[num].EP_CONTROL , data); } ep->stalled = false; if (ep->halted) { ep->halted = false; _nbu2ss_restert_transfer(ep); } } } } /*-------------------------------------------------------------------------*/ static void _nbu2ss_set_test_mode(struct nbu2ss_udc *udc, u32 mode) { u32 data; if (mode > MAX_TEST_MODE_NUM) return; dev_info(udc->dev, "SET FEATURE : test mode = %d\n", mode); data = _nbu2ss_readl(&udc->p_regs->USB_CONTROL); data &= ~TEST_FORCE_ENABLE; data |= mode << TEST_MODE_SHIFT; _nbu2ss_writel(&udc->p_regs->USB_CONTROL, data); _nbu2ss_bitset(&udc->p_regs->TEST_CONTROL, CS_TESTMODEEN); } /*-------------------------------------------------------------------------*/ static int _nbu2ss_set_feature_device(struct nbu2ss_udc *udc, u16 selector, u16 wIndex) { int result = -EOPNOTSUPP; switch (selector) { case USB_DEVICE_REMOTE_WAKEUP: if (wIndex == 0x0000) { udc->remote_wakeup = U2F_ENABLE; result = 0; } break; case USB_DEVICE_TEST_MODE: wIndex >>= 8; if (wIndex <= MAX_TEST_MODE_NUM) result = 0; break; default: break; } return result; } /*-------------------------------------------------------------------------*/ static int _nbu2ss_get_ep_stall(struct nbu2ss_udc *udc, u8 ep_adrs) { u8 epnum; u32 data = 0, bit_data; struct fc_regs __iomem *preg = udc->p_regs; epnum = ep_adrs & ~USB_ENDPOINT_DIR_MASK; if (epnum == 0) { data = _nbu2ss_readl(&preg->EP0_CONTROL); bit_data = EP0_STL; } else { data = _nbu2ss_readl(&preg->EP_REGS[epnum - 1].EP_CONTROL); if ((data & EPN_EN) == 0) return -1; if (ep_adrs & USB_ENDPOINT_DIR_MASK) bit_data = EPN_ISTL; else bit_data = EPN_OSTL; } if ((data & bit_data) == 0) return 0; return 1; } /*-------------------------------------------------------------------------*/ static inline int _nbu2ss_req_feature(struct nbu2ss_udc *udc, bool bset) { u8 recipient = (u8)(udc->ctrl.bRequestType & USB_RECIP_MASK); u8 direction = (u8)(udc->ctrl.bRequestType & USB_DIR_IN); u16 selector = le16_to_cpu(udc->ctrl.wValue); u16 wIndex = le16_to_cpu(udc->ctrl.wIndex); u8 ep_adrs; int result = -EOPNOTSUPP; if ((udc->ctrl.wLength != 0x0000) || (direction != USB_DIR_OUT)) { return -EINVAL; } switch (recipient) { case USB_RECIP_DEVICE: if (bset) result = _nbu2ss_set_feature_device(udc, selector, wIndex); break; case USB_RECIP_ENDPOINT: if (0x0000 == (wIndex & 0xFF70)) { if (selector == USB_ENDPOINT_HALT) { ep_adrs = wIndex & 0xFF; if (!bset) { _nbu2ss_endpoint_toggle_reset(udc, ep_adrs); } _nbu2ss_set_endpoint_stall(udc, ep_adrs, bset); result = 0; } } break; default: break; } if (result >= 0) _nbu2ss_create_ep0_packet(udc, udc->ep0_buf, 0); return result; } /*-------------------------------------------------------------------------*/ static inline enum usb_device_speed _nbu2ss_get_speed(struct nbu2ss_udc *udc) { u32 data; enum usb_device_speed speed = USB_SPEED_FULL; data = _nbu2ss_readl(&udc->p_regs->USB_STATUS); if (data & HIGH_SPEED) speed = USB_SPEED_HIGH; return speed; } /*-------------------------------------------------------------------------*/ static void _nbu2ss_epn_set_stall(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep) { u8 ep_adrs; u32 regdata; int limit_cnt = 0; struct fc_regs __iomem *preg = udc->p_regs; if (ep->direct == USB_DIR_IN) { for (limit_cnt = 0 ; limit_cnt < IN_DATA_EMPTY_COUNT ; limit_cnt++) { regdata = _nbu2ss_readl( &preg->EP_REGS[ep->epnum - 1].EP_STATUS); if ((regdata & EPN_IN_DATA) == 0) break; mdelay(1); } } ep_adrs = ep->epnum | ep->direct; _nbu2ss_set_endpoint_stall(udc, ep_adrs, 1); } /*-------------------------------------------------------------------------*/ static int std_req_get_status(struct nbu2ss_udc *udc) { u32 length; u16 status_data = 0; u8 recipient = (u8)(udc->ctrl.bRequestType & USB_RECIP_MASK); u8 direction = (u8)(udc->ctrl.bRequestType & USB_DIR_IN); u8 ep_adrs; int result = -EINVAL; if ((udc->ctrl.wValue != 0x0000) || (direction != USB_DIR_IN)) return result; length = min_t(u16, le16_to_cpu(udc->ctrl.wLength), sizeof(status_data)); switch (recipient) { case USB_RECIP_DEVICE: if (udc->ctrl.wIndex == 0x0000) { if (udc->gadget.is_selfpowered) status_data |= BIT(USB_DEVICE_SELF_POWERED); if (udc->remote_wakeup) status_data |= BIT(USB_DEVICE_REMOTE_WAKEUP); result = 0; } break; case USB_RECIP_ENDPOINT: if (0x0000 == (le16_to_cpu(udc->ctrl.wIndex) & 0xFF70)) { ep_adrs = (u8)(le16_to_cpu(udc->ctrl.wIndex) & 0xFF); result = _nbu2ss_get_ep_stall(udc, ep_adrs); if (result > 0) status_data |= BIT(USB_ENDPOINT_HALT); } break; default: break; } if (result >= 0) { memcpy(udc->ep0_buf, &status_data, length); _nbu2ss_create_ep0_packet(udc, udc->ep0_buf, length); _nbu2ss_ep0_in_transfer(udc, &udc->ep0_req); } else { dev_err(udc->dev, " Error GET_STATUS\n"); } return result; } /*-------------------------------------------------------------------------*/ static int std_req_clear_feature(struct nbu2ss_udc *udc) { return _nbu2ss_req_feature(udc, false); } /*-------------------------------------------------------------------------*/ static int std_req_set_feature(struct nbu2ss_udc *udc) { return _nbu2ss_req_feature(udc, true); } /*-------------------------------------------------------------------------*/ static int std_req_set_address(struct nbu2ss_udc *udc) { int result = 0; u32 wValue = le16_to_cpu(udc->ctrl.wValue); if ((udc->ctrl.bRequestType != 0x00) || (udc->ctrl.wIndex != 0x0000) || (udc->ctrl.wLength != 0x0000)) { return -EINVAL; } if (wValue != (wValue & 0x007F)) return -EINVAL; wValue <<= USB_ADRS_SHIFT; _nbu2ss_writel(&udc->p_regs->USB_ADDRESS, wValue); _nbu2ss_create_ep0_packet(udc, udc->ep0_buf, 0); return result; } /*-------------------------------------------------------------------------*/ static int std_req_set_configuration(struct nbu2ss_udc *udc) { u32 config_value = (u32)(le16_to_cpu(udc->ctrl.wValue) & 0x00ff); if ((udc->ctrl.wIndex != 0x0000) || (udc->ctrl.wLength != 0x0000) || (udc->ctrl.bRequestType != 0x00)) { return -EINVAL; } udc->curr_config = config_value; if (config_value > 0) { _nbu2ss_bitset(&udc->p_regs->USB_CONTROL, CONF); udc->devstate = USB_STATE_CONFIGURED; } else { _nbu2ss_bitclr(&udc->p_regs->USB_CONTROL, CONF); udc->devstate = USB_STATE_ADDRESS; } return 0; } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_read_request_data(struct nbu2ss_udc *udc, u32 *pdata) { *pdata = _nbu2ss_readl(&udc->p_regs->SETUP_DATA0); pdata++; *pdata = _nbu2ss_readl(&udc->p_regs->SETUP_DATA1); } /*-------------------------------------------------------------------------*/ static inline int _nbu2ss_decode_request(struct nbu2ss_udc *udc) { bool bcall_back = true; int nret = -EINVAL; struct usb_ctrlrequest *p_ctrl; p_ctrl = &udc->ctrl; _nbu2ss_read_request_data(udc, (u32 *)p_ctrl); /* ep0 state control */ if (p_ctrl->wLength == 0) { udc->ep0state = EP0_IN_STATUS_PHASE; } else { if (p_ctrl->bRequestType & USB_DIR_IN) udc->ep0state = EP0_IN_DATA_PHASE; else udc->ep0state = EP0_OUT_DATA_PHASE; } if ((p_ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { switch (p_ctrl->bRequest) { case USB_REQ_GET_STATUS: nret = std_req_get_status(udc); bcall_back = false; break; case USB_REQ_CLEAR_FEATURE: nret = std_req_clear_feature(udc); bcall_back = false; break; case USB_REQ_SET_FEATURE: nret = std_req_set_feature(udc); bcall_back = false; break; case USB_REQ_SET_ADDRESS: nret = std_req_set_address(udc); bcall_back = false; break; case USB_REQ_SET_CONFIGURATION: nret = std_req_set_configuration(udc); break; default: break; } } if (!bcall_back) { if (udc->ep0state == EP0_IN_STATUS_PHASE) { if (nret >= 0) { /*--------------------------------------*/ /* Status Stage */ nret = EP0_send_NULL(udc, true); } } } else { spin_unlock(&udc->lock); nret = udc->driver->setup(&udc->gadget, &udc->ctrl); spin_lock(&udc->lock); } if (nret < 0) udc->ep0state = EP0_IDLE; return nret; } /*-------------------------------------------------------------------------*/ static inline int _nbu2ss_ep0_in_data_stage(struct nbu2ss_udc *udc) { int nret; struct nbu2ss_req *req; struct nbu2ss_ep *ep = &udc->ep[0]; req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue); if (!req) req = &udc->ep0_req; req->req.actual += req->div_len; req->div_len = 0; nret = _nbu2ss_ep0_in_transfer(udc, req); if (nret == 0) { udc->ep0state = EP0_OUT_STATUS_PAHSE; EP0_receive_NULL(udc, true); } return 0; } /*-------------------------------------------------------------------------*/ static inline int _nbu2ss_ep0_out_data_stage(struct nbu2ss_udc *udc) { int nret; struct nbu2ss_req *req; struct nbu2ss_ep *ep = &udc->ep[0]; req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue); if (!req) req = &udc->ep0_req; nret = _nbu2ss_ep0_out_transfer(udc, req); if (nret == 0) { udc->ep0state = EP0_IN_STATUS_PHASE; EP0_send_NULL(udc, true); } else if (nret < 0) { _nbu2ss_bitset(&udc->p_regs->EP0_CONTROL, EP0_BCLR); req->req.status = nret; } return 0; } /*-------------------------------------------------------------------------*/ static inline int _nbu2ss_ep0_status_stage(struct nbu2ss_udc *udc) { struct nbu2ss_req *req; struct nbu2ss_ep *ep = &udc->ep[0]; req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue); if (!req) { req = &udc->ep0_req; if (req->req.complete) req->req.complete(&ep->ep, &req->req); } else { if (req->req.complete) _nbu2ss_ep_done(ep, req, 0); } udc->ep0state = EP0_IDLE; return 0; } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_ep0_int(struct nbu2ss_udc *udc) { int i; u32 status; u32 intr; int nret = -1; status = _nbu2ss_readl(&udc->p_regs->EP0_STATUS); intr = status & EP0_STATUS_RW_BIT; _nbu2ss_writel(&udc->p_regs->EP0_STATUS, ~intr); status &= (SETUP_INT | EP0_IN_INT | EP0_OUT_INT | STG_END_INT | EP0_OUT_NULL_INT); if (status == 0) { dev_info(udc->dev, "%s Not Decode Interrupt\n", __func__); dev_info(udc->dev, "EP0_STATUS = 0x%08x\n", intr); return; } if (udc->gadget.speed == USB_SPEED_UNKNOWN) udc->gadget.speed = _nbu2ss_get_speed(udc); for (i = 0; i < EP0_END_XFER; i++) { switch (udc->ep0state) { case EP0_IDLE: if (status & SETUP_INT) { status = 0; nret = _nbu2ss_decode_request(udc); } break; case EP0_IN_DATA_PHASE: if (status & EP0_IN_INT) { status &= ~EP0_IN_INT; nret = _nbu2ss_ep0_in_data_stage(udc); } break; case EP0_OUT_DATA_PHASE: if (status & EP0_OUT_INT) { status &= ~EP0_OUT_INT; nret = _nbu2ss_ep0_out_data_stage(udc); } break; case EP0_IN_STATUS_PHASE: if ((status & STG_END_INT) || (status & SETUP_INT)) { status &= ~(STG_END_INT | EP0_IN_INT); nret = _nbu2ss_ep0_status_stage(udc); } break; case EP0_OUT_STATUS_PAHSE: if ((status & STG_END_INT) || (status & SETUP_INT) || (status & EP0_OUT_NULL_INT)) { status &= ~(STG_END_INT | EP0_OUT_INT | EP0_OUT_NULL_INT); nret = _nbu2ss_ep0_status_stage(udc); } break; default: status = 0; break; } if (status == 0) break; } if (nret < 0) { /* Send Stall */ _nbu2ss_set_endpoint_stall(udc, 0, true); } } /*-------------------------------------------------------------------------*/ static void _nbu2ss_ep_done(struct nbu2ss_ep *ep, struct nbu2ss_req *req, int status) { struct nbu2ss_udc *udc = ep->udc; list_del_init(&req->queue); if (status == -ECONNRESET) _nbu2ss_fifo_flush(udc, ep); if (likely(req->req.status == -EINPROGRESS)) req->req.status = status; if (ep->stalled) { _nbu2ss_epn_set_stall(udc, ep); } else { if (!list_empty(&ep->queue)) _nbu2ss_restert_transfer(ep); } #ifdef USE_DMA if ((ep->direct == USB_DIR_OUT) && (ep->epnum > 0) && (req->req.dma != 0)) _nbu2ss_dma_unmap_single(udc, ep, req, USB_DIR_OUT); #endif spin_unlock(&udc->lock); req->req.complete(&ep->ep, &req->req); spin_lock(&udc->lock); } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_epn_in_int(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req) { int result = 0; u32 status; struct fc_regs __iomem *preg = udc->p_regs; if (req->dma_flag) return; /* DMA is forwarded */ req->req.actual += req->div_len; req->div_len = 0; if (req->req.actual != req->req.length) { /*---------------------------------------------------------*/ /* remainder of data */ result = _nbu2ss_epn_in_transfer(udc, ep, req); } else { if (req->zero && ((req->req.actual % ep->ep.maxpacket) == 0)) { status = _nbu2ss_readl(&preg->EP_REGS[ep->epnum - 1].EP_STATUS); if ((status & EPN_IN_FULL) == 0) { /*-----------------------------------------*/ /* 0 Length Packet */ req->zero = false; _nbu2ss_zero_len_pkt(udc, ep->epnum); } return; } } if (result <= 0) { /*---------------------------------------------------------*/ /* Complete */ _nbu2ss_ep_done(ep, req, result); } } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_epn_out_int(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req) { int result; result = _nbu2ss_epn_out_transfer(udc, ep, req); if (result <= 0) _nbu2ss_ep_done(ep, req, result); } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_epn_in_dma_int(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req) { u32 mpkt; u32 size; struct usb_request *preq; preq = &req->req; if (!req->dma_flag) return; preq->actual += req->div_len; req->div_len = 0; req->dma_flag = false; #ifdef USE_DMA _nbu2ss_dma_unmap_single(udc, ep, req, USB_DIR_IN); #endif if (preq->actual != preq->length) { _nbu2ss_epn_in_transfer(udc, ep, req); } else { mpkt = ep->ep.maxpacket; size = preq->actual % mpkt; if (size > 0) { if (((preq->actual & 0x03) == 0) && (size < mpkt)) _nbu2ss_ep_in_end(udc, ep->epnum, 0, 0); } else { _nbu2ss_epn_in_int(udc, ep, req); } } } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_epn_out_dma_int(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, struct nbu2ss_req *req) { int i; u32 num; u32 dmacnt, ep_dmacnt; u32 mpkt; struct fc_regs __iomem *preg = udc->p_regs; num = ep->epnum - 1; if (req->req.actual == req->req.length) { if ((req->req.length % ep->ep.maxpacket) && !req->zero) { req->div_len = 0; req->dma_flag = false; _nbu2ss_ep_done(ep, req, 0); return; } } ep_dmacnt = _nbu2ss_readl(&preg->EP_REGS[num].EP_LEN_DCNT) & EPN_DMACNT; ep_dmacnt >>= 16; for (i = 0; i < EPC_PLL_LOCK_COUNT; i++) { dmacnt = _nbu2ss_readl(&preg->EP_DCR[num].EP_DCR1) & DCR1_EPN_DMACNT; dmacnt >>= 16; if (ep_dmacnt == dmacnt) break; } _nbu2ss_bitclr(&preg->EP_DCR[num].EP_DCR1, DCR1_EPN_REQEN); if (dmacnt != 0) { mpkt = ep->ep.maxpacket; if ((req->div_len % mpkt) == 0) req->div_len -= mpkt * dmacnt; } if ((req->req.actual % ep->ep.maxpacket) > 0) { if (req->req.actual == req->div_len) { req->div_len = 0; req->dma_flag = false; _nbu2ss_ep_done(ep, req, 0); return; } } req->req.actual += req->div_len; req->div_len = 0; req->dma_flag = false; _nbu2ss_epn_out_int(udc, ep, req); } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_epn_int(struct nbu2ss_udc *udc, u32 epnum) { u32 num; u32 status; struct nbu2ss_req *req; struct nbu2ss_ep *ep = &udc->ep[epnum]; num = epnum - 1; /* Interrupt Status */ status = _nbu2ss_readl(&udc->p_regs->EP_REGS[num].EP_STATUS); /* Interrupt Clear */ _nbu2ss_writel(&udc->p_regs->EP_REGS[num].EP_STATUS, ~status); req = list_first_entry_or_null(&ep->queue, struct nbu2ss_req, queue); if (!req) { /* pr_warn("=== %s(%d) req == NULL\n", __func__, epnum); */ return; } if (status & EPN_OUT_END_INT) { status &= ~EPN_OUT_INT; _nbu2ss_epn_out_dma_int(udc, ep, req); } if (status & EPN_OUT_INT) _nbu2ss_epn_out_int(udc, ep, req); if (status & EPN_IN_END_INT) { status &= ~EPN_IN_INT; _nbu2ss_epn_in_dma_int(udc, ep, req); } if (status & EPN_IN_INT) _nbu2ss_epn_in_int(udc, ep, req); } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_ep_int(struct nbu2ss_udc *udc, u32 epnum) { if (epnum == 0) _nbu2ss_ep0_int(udc); else _nbu2ss_epn_int(udc, epnum); } /*-------------------------------------------------------------------------*/ static void _nbu2ss_ep0_enable(struct nbu2ss_udc *udc) { _nbu2ss_bitset(&udc->p_regs->EP0_CONTROL, (EP0_AUTO | EP0_BCLR)); _nbu2ss_writel(&udc->p_regs->EP0_INT_ENA, EP0_INT_EN_BIT); } /*-------------------------------------------------------------------------*/ static int _nbu2ss_nuke(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep, int status) { struct nbu2ss_req *req; /* Endpoint Disable */ _nbu2ss_epn_exit(udc, ep); /* DMA Disable */ _nbu2ss_ep_dma_exit(udc, ep); if (list_empty(&ep->queue)) return 0; /* called with irqs blocked */ list_for_each_entry(req, &ep->queue, queue) { _nbu2ss_ep_done(ep, req, status); } return 0; } /*-------------------------------------------------------------------------*/ static void _nbu2ss_quiesce(struct nbu2ss_udc *udc) { struct nbu2ss_ep *ep; udc->gadget.speed = USB_SPEED_UNKNOWN; _nbu2ss_nuke(udc, &udc->ep[0], -ESHUTDOWN); /* Endpoint n */ list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) { _nbu2ss_nuke(udc, ep, -ESHUTDOWN); } } /*-------------------------------------------------------------------------*/ static int _nbu2ss_pullup(struct nbu2ss_udc *udc, int is_on) { u32 reg_dt; if (udc->vbus_active == 0) return -ESHUTDOWN; if (is_on) { /* D+ Pullup */ if (udc->driver) { reg_dt = (_nbu2ss_readl(&udc->p_regs->USB_CONTROL) | PUE2) & ~(u32)CONNECTB; _nbu2ss_writel(&udc->p_regs->USB_CONTROL, reg_dt); } } else { /* D+ Pulldown */ reg_dt = (_nbu2ss_readl(&udc->p_regs->USB_CONTROL) | CONNECTB) & ~(u32)PUE2; _nbu2ss_writel(&udc->p_regs->USB_CONTROL, reg_dt); udc->gadget.speed = USB_SPEED_UNKNOWN; } return 0; } /*-------------------------------------------------------------------------*/ static void _nbu2ss_fifo_flush(struct nbu2ss_udc *udc, struct nbu2ss_ep *ep) { struct fc_regs __iomem *p = udc->p_regs; if (udc->vbus_active == 0) return; if (ep->epnum == 0) { /* EP0 */ _nbu2ss_bitset(&p->EP0_CONTROL, EP0_BCLR); } else { /* EPN */ _nbu2ss_ep_dma_abort(udc, ep); _nbu2ss_bitset(&p->EP_REGS[ep->epnum - 1].EP_CONTROL, EPN_BCLR); } } /*-------------------------------------------------------------------------*/ static int _nbu2ss_enable_controller(struct nbu2ss_udc *udc) { int waitcnt = 0; if (udc->udc_enabled) return 0; /* Reset */ _nbu2ss_bitset(&udc->p_regs->EPCTR, (DIRPD | EPC_RST)); udelay(EPC_RST_DISABLE_TIME); /* 1us wait */ _nbu2ss_bitclr(&udc->p_regs->EPCTR, DIRPD); mdelay(EPC_DIRPD_DISABLE_TIME); /* 1ms wait */ _nbu2ss_bitclr(&udc->p_regs->EPCTR, EPC_RST); _nbu2ss_writel(&udc->p_regs->AHBSCTR, WAIT_MODE); _nbu2ss_writel(&udc->p_regs->AHBMCTR, HBUSREQ_MODE | HTRANS_MODE | WBURST_TYPE); while (!(_nbu2ss_readl(&udc->p_regs->EPCTR) & PLL_LOCK)) { waitcnt++; udelay(1); /* 1us wait */ if (waitcnt == EPC_PLL_LOCK_COUNT) { dev_err(udc->dev, "*** Reset Cancel failed\n"); return -EINVAL; } } _nbu2ss_bitset(&udc->p_regs->UTMI_CHARACTER_1, USB_SQUSET); _nbu2ss_bitset(&udc->p_regs->USB_CONTROL, (INT_SEL | SOF_RCV)); /* EP0 */ _nbu2ss_ep0_enable(udc); /* USB Interrupt Enable */ _nbu2ss_bitset(&udc->p_regs->USB_INT_ENA, USB_INT_EN_BIT); udc->udc_enabled = true; return 0; } /*-------------------------------------------------------------------------*/ static void _nbu2ss_reset_controller(struct nbu2ss_udc *udc) { _nbu2ss_bitset(&udc->p_regs->EPCTR, EPC_RST); _nbu2ss_bitclr(&udc->p_regs->EPCTR, EPC_RST); } /*-------------------------------------------------------------------------*/ static void _nbu2ss_disable_controller(struct nbu2ss_udc *udc) { if (udc->udc_enabled) { udc->udc_enabled = false; _nbu2ss_reset_controller(udc); _nbu2ss_bitset(&udc->p_regs->EPCTR, (DIRPD | EPC_RST)); } } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_check_vbus(struct nbu2ss_udc *udc) { int nret; u32 reg_dt; /* chattering */ mdelay(VBUS_CHATTERING_MDELAY); /* wait (ms) */ /* VBUS ON Check*/ reg_dt = gpiod_get_value(vbus_gpio); if (reg_dt == 0) { udc->linux_suspended = 0; _nbu2ss_reset_controller(udc); dev_info(udc->dev, " ----- VBUS OFF\n"); if (udc->vbus_active == 1) { /* VBUS OFF */ udc->vbus_active = 0; if (udc->usb_suspended) { udc->usb_suspended = 0; /* _nbu2ss_reset_controller(udc); */ } udc->devstate = USB_STATE_NOTATTACHED; _nbu2ss_quiesce(udc); if (udc->driver) { spin_unlock(&udc->lock); udc->driver->disconnect(&udc->gadget); spin_lock(&udc->lock); } _nbu2ss_disable_controller(udc); } } else { mdelay(5); /* wait (5ms) */ reg_dt = gpiod_get_value(vbus_gpio); if (reg_dt == 0) return; dev_info(udc->dev, " ----- VBUS ON\n"); if (udc->linux_suspended) return; if (udc->vbus_active == 0) { /* VBUS ON */ udc->vbus_active = 1; udc->devstate = USB_STATE_POWERED; nret = _nbu2ss_enable_controller(udc); if (nret < 0) { _nbu2ss_disable_controller(udc); udc->vbus_active = 0; return; } _nbu2ss_pullup(udc, 1); #ifdef UDC_DEBUG_DUMP _nbu2ss_dump_register(udc); #endif /* UDC_DEBUG_DUMP */ } else { if (udc->devstate == USB_STATE_POWERED) _nbu2ss_pullup(udc, 1); } } } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_int_bus_reset(struct nbu2ss_udc *udc) { udc->devstate = USB_STATE_DEFAULT; udc->remote_wakeup = 0; _nbu2ss_quiesce(udc); udc->ep0state = EP0_IDLE; } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_int_usb_resume(struct nbu2ss_udc *udc) { if (udc->usb_suspended == 1) { udc->usb_suspended = 0; if (udc->driver && udc->driver->resume) { spin_unlock(&udc->lock); udc->driver->resume(&udc->gadget); spin_lock(&udc->lock); } } } /*-------------------------------------------------------------------------*/ static inline void _nbu2ss_int_usb_suspend(struct nbu2ss_udc *udc) { u32 reg_dt; if (udc->usb_suspended == 0) { reg_dt = gpiod_get_value(vbus_gpio); if (reg_dt == 0) return; udc->usb_suspended = 1; if (udc->driver && udc->driver->suspend) { spin_unlock(&udc->lock); udc->driver->suspend(&udc->gadget); spin_lock(&udc->lock); } _nbu2ss_bitset(&udc->p_regs->USB_CONTROL, SUSPEND); } } /*-------------------------------------------------------------------------*/ /* VBUS (GPIO153) Interrupt */ static irqreturn_t _nbu2ss_vbus_irq(int irq, void *_udc) { struct nbu2ss_udc *udc = (struct nbu2ss_udc *)_udc; spin_lock(&udc->lock); _nbu2ss_check_vbus(udc); spin_unlock(&udc->lock); return IRQ_HANDLED; } /*-------------------------------------------------------------------------*/ /* Interrupt (udc) */ static irqreturn_t _nbu2ss_udc_irq(int irq, void *_udc) { u8 suspend_flag = 0; u32 status; u32 epnum, int_bit; struct nbu2ss_udc *udc = (struct nbu2ss_udc *)_udc; struct fc_regs __iomem *preg = udc->p_regs; if (gpiod_get_value(vbus_gpio) == 0) { _nbu2ss_writel(&preg->USB_INT_STA, ~USB_INT_STA_RW); _nbu2ss_writel(&preg->USB_INT_ENA, 0); return IRQ_HANDLED; } spin_lock(&udc->lock); for (;;) { if (gpiod_get_value(vbus_gpio) == 0) { _nbu2ss_writel(&preg->USB_INT_STA, ~USB_INT_STA_RW); _nbu2ss_writel(&preg->USB_INT_ENA, 0); status = 0; } else { status = _nbu2ss_readl(&preg->USB_INT_STA); } if (status == 0) break; _nbu2ss_writel(&preg->USB_INT_STA, ~(status & USB_INT_STA_RW)); if (status & USB_RST_INT) { /* USB Reset */ _nbu2ss_int_bus_reset(udc); } if (status & RSUM_INT) { /* Resume */ _nbu2ss_int_usb_resume(udc); } if (status & SPND_INT) { /* Suspend */ suspend_flag = 1; } if (status & EPN_INT) { /* EP INT */ int_bit = status >> 8; for (epnum = 0; epnum < NUM_ENDPOINTS; epnum++) { if (0x01 & int_bit) _nbu2ss_ep_int(udc, epnum); int_bit >>= 1; if (int_bit == 0) break; } } } if (suspend_flag) _nbu2ss_int_usb_suspend(udc); spin_unlock(&udc->lock); return IRQ_HANDLED; } /*-------------------------------------------------------------------------*/ /* usb_ep_ops */ static int nbu2ss_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) { u8 ep_type; unsigned long flags; struct nbu2ss_ep *ep; struct nbu2ss_udc *udc; if (!_ep || !desc) { pr_err(" *** %s, bad param\n", __func__); return -EINVAL; } ep = container_of(_ep, struct nbu2ss_ep, ep); if (!ep->udc) { pr_err(" *** %s, ep == NULL !!\n", __func__); return -EINVAL; } ep_type = usb_endpoint_type(desc); if ((ep_type == USB_ENDPOINT_XFER_CONTROL) || (ep_type == USB_ENDPOINT_XFER_ISOC)) { pr_err(" *** %s, bat bmAttributes\n", __func__); return -EINVAL; } udc = ep->udc; if (udc->vbus_active == 0) return -ESHUTDOWN; if ((!udc->driver) || (udc->gadget.speed == USB_SPEED_UNKNOWN)) { dev_err(ep->udc->dev, " *** %s, udc !!\n", __func__); return -ESHUTDOWN; } spin_lock_irqsave(&udc->lock, flags); ep->desc = desc; ep->epnum = usb_endpoint_num(desc); ep->direct = desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK; ep->ep_type = ep_type; ep->wedged = 0; ep->halted = false; ep->stalled = false; ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize); /* DMA setting */ _nbu2ss_ep_dma_init(udc, ep); /* Endpoint setting */ _nbu2ss_ep_init(udc, ep); spin_unlock_irqrestore(&udc->lock, flags); return 0; } /*-------------------------------------------------------------------------*/ static int nbu2ss_ep_disable(struct usb_ep *_ep) { struct nbu2ss_ep *ep; struct nbu2ss_udc *udc; unsigned long flags; if (!_ep) { pr_err(" *** %s, bad param\n", __func__); return -EINVAL; } ep = container_of(_ep, struct nbu2ss_ep, ep); if (!ep->udc) { pr_err("udc: *** %s, ep == NULL !!\n", __func__); return -EINVAL; } udc = ep->udc; if (udc->vbus_active == 0) return -ESHUTDOWN; spin_lock_irqsave(&udc->lock, flags); _nbu2ss_nuke(udc, ep, -EINPROGRESS); /* dequeue request */ spin_unlock_irqrestore(&udc->lock, flags); return 0; } /*-------------------------------------------------------------------------*/ static struct usb_request *nbu2ss_ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) { struct nbu2ss_req *req; req = kzalloc(sizeof(*req), gfp_flags); if (!req) return NULL; #ifdef USE_DMA req->req.dma = DMA_ADDR_INVALID; #endif INIT_LIST_HEAD(&req->queue); return &req->req; } /*-------------------------------------------------------------------------*/ static void nbu2ss_ep_free_request(struct usb_ep *_ep, struct usb_request *_req) { struct nbu2ss_req *req; if (_req) { req = container_of(_req, struct nbu2ss_req, req); kfree(req); } } /*-------------------------------------------------------------------------*/ static int nbu2ss_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) { struct nbu2ss_req *req; struct nbu2ss_ep *ep; struct nbu2ss_udc *udc; unsigned long flags; bool bflag; int result = -EINVAL; /* catch various bogus parameters */ if (!_ep || !_req) { if (!_ep) pr_err("udc: %s --- _ep == NULL\n", __func__); if (!_req) pr_err("udc: %s --- _req == NULL\n", __func__); return -EINVAL; } req = container_of(_req, struct nbu2ss_req, req); if (unlikely(!_req->complete || !_req->buf || !list_empty(&req->queue))) { if (!_req->complete) pr_err("udc: %s --- !_req->complete\n", __func__); if (!_req->buf) pr_err("udc:%s --- !_req->buf\n", __func__); if (!list_empty(&req->queue)) pr_err("%s --- !list_empty(&req->queue)\n", __func__); return -EINVAL; } ep = container_of(_ep, struct nbu2ss_ep, ep); udc = ep->udc; if (udc->vbus_active == 0) { dev_info(udc->dev, "Can't ep_queue (VBUS OFF)\n"); return -ESHUTDOWN; } if (unlikely(!udc->driver)) { dev_err(udc->dev, "%s, bogus device state %p\n", __func__, udc->driver); return -ESHUTDOWN; } spin_lock_irqsave(&udc->lock, flags); #ifdef USE_DMA if ((uintptr_t)req->req.buf & 0x3) req->unaligned = true; else req->unaligned = false; if (req->unaligned) { if (!ep->virt_buf) ep->virt_buf = dma_alloc_coherent(NULL, PAGE_SIZE, &ep->phys_buf, GFP_ATOMIC | GFP_DMA); if (ep->epnum > 0) { if (ep->direct == USB_DIR_IN) memcpy(ep->virt_buf, req->req.buf, req->req.length); } } if ((ep->epnum > 0) && (ep->direct == USB_DIR_OUT) && (req->req.dma != 0)) _nbu2ss_dma_map_single(udc, ep, req, USB_DIR_OUT); #endif _req->status = -EINPROGRESS; _req->actual = 0; bflag = list_empty(&ep->queue); list_add_tail(&req->queue, &ep->queue); if (bflag && !ep->stalled) { result = _nbu2ss_start_transfer(udc, ep, req, false); if (result < 0) { dev_err(udc->dev, " *** %s, result = %d\n", __func__, result); list_del(&req->queue); } else if ((ep->epnum > 0) && (ep->direct == USB_DIR_OUT)) { #ifdef USE_DMA if (req->req.length < 4 && req->req.length == req->req.actual) #else if (req->req.length == req->req.actual) #endif _nbu2ss_ep_done(ep, req, result); } } spin_unlock_irqrestore(&udc->lock, flags); return 0; } /*-------------------------------------------------------------------------*/ static int nbu2ss_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) { struct nbu2ss_req *req; struct nbu2ss_ep *ep; struct nbu2ss_udc *udc; unsigned long flags; /* catch various bogus parameters */ if (!_ep || !_req) { /* pr_err("%s, bad param(1)\n", __func__); */ return -EINVAL; } ep = container_of(_ep, struct nbu2ss_ep, ep); udc = ep->udc; if (!udc) return -EINVAL; spin_lock_irqsave(&udc->lock, flags); /* make sure it's actually queued on this endpoint */ list_for_each_entry(req, &ep->queue, queue) { if (&req->req == _req) { _nbu2ss_ep_done(ep, req, -ECONNRESET); spin_unlock_irqrestore(&udc->lock, flags); return 0; } } spin_unlock_irqrestore(&udc->lock, flags); pr_debug("%s no queue(EINVAL)\n", __func__); return -EINVAL; } /*-------------------------------------------------------------------------*/ static int nbu2ss_ep_set_halt(struct usb_ep *_ep, int value) { u8 ep_adrs; unsigned long flags; struct nbu2ss_ep *ep; struct nbu2ss_udc *udc; if (!_ep) { pr_err("%s, bad param\n", __func__); return -EINVAL; } ep = container_of(_ep, struct nbu2ss_ep, ep); udc = ep->udc; if (!udc) { dev_err(ep->udc->dev, " *** %s, bad udc\n", __func__); return -EINVAL; } spin_lock_irqsave(&udc->lock, flags); ep_adrs = ep->epnum | ep->direct; if (value == 0) { _nbu2ss_set_endpoint_stall(udc, ep_adrs, value); ep->stalled = false; } else { if (list_empty(&ep->queue)) _nbu2ss_epn_set_stall(udc, ep); else ep->stalled = true; } if (value == 0) ep->wedged = 0; spin_unlock_irqrestore(&udc->lock, flags); return 0; } static int nbu2ss_ep_set_wedge(struct usb_ep *_ep) { return nbu2ss_ep_set_halt(_ep, 1); } /*-------------------------------------------------------------------------*/ static int nbu2ss_ep_fifo_status(struct usb_ep *_ep) { u32 data; struct nbu2ss_ep *ep; struct nbu2ss_udc *udc; unsigned long flags; struct fc_regs __iomem *preg; if (!_ep) { pr_err("%s, bad param\n", __func__); return -EINVAL; } ep = container_of(_ep, struct nbu2ss_ep, ep); udc = ep->udc; if (!udc) { dev_err(ep->udc->dev, "%s, bad udc\n", __func__); return -EINVAL; } preg = udc->p_regs; data = gpiod_get_value(vbus_gpio); if (data == 0) return -EINVAL; spin_lock_irqsave(&udc->lock, flags); if (ep->epnum == 0) { data = _nbu2ss_readl(&preg->EP0_LENGTH) & EP0_LDATA; } else { data = _nbu2ss_readl(&preg->EP_REGS[ep->epnum - 1].EP_LEN_DCNT) & EPN_LDATA; } spin_unlock_irqrestore(&udc->lock, flags); return 0; } /*-------------------------------------------------------------------------*/ static void nbu2ss_ep_fifo_flush(struct usb_ep *_ep) { u32 data; struct nbu2ss_ep *ep; struct nbu2ss_udc *udc; unsigned long flags; if (!_ep) { pr_err("udc: %s, bad param\n", __func__); return; } ep = container_of(_ep, struct nbu2ss_ep, ep); udc = ep->udc; if (!udc) { dev_err(ep->udc->dev, "%s, bad udc\n", __func__); return; } data = gpiod_get_value(vbus_gpio); if (data == 0) return; spin_lock_irqsave(&udc->lock, flags); _nbu2ss_fifo_flush(udc, ep); spin_unlock_irqrestore(&udc->lock, flags); } /*-------------------------------------------------------------------------*/ static const struct usb_ep_ops nbu2ss_ep_ops = { .enable = nbu2ss_ep_enable, .disable = nbu2ss_ep_disable, .alloc_request = nbu2ss_ep_alloc_request, .free_request = nbu2ss_ep_free_request, .queue = nbu2ss_ep_queue, .dequeue = nbu2ss_ep_dequeue, .set_halt = nbu2ss_ep_set_halt, .set_wedge = nbu2ss_ep_set_wedge, .fifo_status = nbu2ss_ep_fifo_status, .fifo_flush = nbu2ss_ep_fifo_flush, }; /*-------------------------------------------------------------------------*/ /* usb_gadget_ops */ /*-------------------------------------------------------------------------*/ static int nbu2ss_gad_get_frame(struct usb_gadget *pgadget) { u32 data; struct nbu2ss_udc *udc; if (!pgadget) { pr_err("udc: %s, bad param\n", __func__); return -EINVAL; } udc = container_of(pgadget, struct nbu2ss_udc, gadget); data = gpiod_get_value(vbus_gpio); if (data == 0) return -EINVAL; return _nbu2ss_readl(&udc->p_regs->USB_ADDRESS) & FRAME; } /*-------------------------------------------------------------------------*/ static int nbu2ss_gad_wakeup(struct usb_gadget *pgadget) { int i; u32 data; struct nbu2ss_udc *udc; if (!pgadget) { pr_err("%s, bad param\n", __func__); return -EINVAL; } udc = container_of(pgadget, struct nbu2ss_udc, gadget); data = gpiod_get_value(vbus_gpio); if (data == 0) { dev_warn(&pgadget->dev, "VBUS LEVEL = %d\n", data); return -EINVAL; } _nbu2ss_bitset(&udc->p_regs->EPCTR, PLL_RESUME); for (i = 0; i < EPC_PLL_LOCK_COUNT; i++) { data = _nbu2ss_readl(&udc->p_regs->EPCTR); if (data & PLL_LOCK) break; } _nbu2ss_bitclr(&udc->p_regs->EPCTR, PLL_RESUME); return 0; } /*-------------------------------------------------------------------------*/ static int nbu2ss_gad_set_selfpowered(struct usb_gadget *pgadget, int is_selfpowered) { struct nbu2ss_udc *udc; unsigned long flags; if (!pgadget) { pr_err("%s, bad param\n", __func__); return -EINVAL; } udc = container_of(pgadget, struct nbu2ss_udc, gadget); spin_lock_irqsave(&udc->lock, flags); pgadget->is_selfpowered = (is_selfpowered != 0); spin_unlock_irqrestore(&udc->lock, flags); return 0; } /*-------------------------------------------------------------------------*/ static int nbu2ss_gad_vbus_session(struct usb_gadget *pgadget, int is_active) { return 0; } /*-------------------------------------------------------------------------*/ static int nbu2ss_gad_vbus_draw(struct usb_gadget *pgadget, unsigned int mA) { struct nbu2ss_udc *udc; unsigned long flags; if (!pgadget) { pr_err("%s, bad param\n", __func__); return -EINVAL; } udc = container_of(pgadget, struct nbu2ss_udc, gadget); spin_lock_irqsave(&udc->lock, flags); udc->mA = mA; spin_unlock_irqrestore(&udc->lock, flags); return 0; } /*-------------------------------------------------------------------------*/ static int nbu2ss_gad_pullup(struct usb_gadget *pgadget, int is_on) { struct nbu2ss_udc *udc; unsigned long flags; if (!pgadget) { pr_err("%s, bad param\n", __func__); return -EINVAL; } udc = container_of(pgadget, struct nbu2ss_udc, gadget); if (!udc->driver) { pr_warn("%s, Not Regist Driver\n", __func__); return -EINVAL; } if (udc->vbus_active == 0) return -ESHUTDOWN; spin_lock_irqsave(&udc->lock, flags); _nbu2ss_pullup(udc, is_on); spin_unlock_irqrestore(&udc->lock, flags); return 0; } /*-------------------------------------------------------------------------*/ static int nbu2ss_gad_ioctl(struct usb_gadget *pgadget, unsigned int code, unsigned long param) { return 0; } static const struct usb_gadget_ops nbu2ss_gadget_ops = { .get_frame = nbu2ss_gad_get_frame, .wakeup = nbu2ss_gad_wakeup, .set_selfpowered = nbu2ss_gad_set_selfpowered, .vbus_session = nbu2ss_gad_vbus_session, .vbus_draw = nbu2ss_gad_vbus_draw, .pullup = nbu2ss_gad_pullup, .ioctl = nbu2ss_gad_ioctl, }; static const struct { const char *name; const struct usb_ep_caps caps; } ep_info[NUM_ENDPOINTS] = { #define EP_INFO(_name, _caps) \ { \ .name = _name, \ .caps = _caps, \ } EP_INFO("ep0", USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, USB_EP_CAPS_DIR_ALL)), EP_INFO("ep1-bulk", USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_ALL)), EP_INFO("ep2-bulk", USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_ALL)), EP_INFO("ep3in-int", USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)), EP_INFO("ep4-iso", USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_ALL)), EP_INFO("ep5-iso", USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_ALL)), EP_INFO("ep6-bulk", USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_ALL)), EP_INFO("ep7-bulk", USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_ALL)), EP_INFO("ep8in-int", USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)), EP_INFO("ep9-iso", USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_ALL)), EP_INFO("epa-iso", USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, USB_EP_CAPS_DIR_ALL)), EP_INFO("epb-bulk", USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_ALL)), EP_INFO("epc-bulk", USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, USB_EP_CAPS_DIR_ALL)), EP_INFO("epdin-int", USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, USB_EP_CAPS_DIR_IN)), #undef EP_INFO }; /*-------------------------------------------------------------------------*/ static void nbu2ss_drv_ep_init(struct nbu2ss_udc *udc) { int i; INIT_LIST_HEAD(&udc->gadget.ep_list); udc->gadget.ep0 = &udc->ep[0].ep; for (i = 0; i < NUM_ENDPOINTS; i++) { struct nbu2ss_ep *ep = &udc->ep[i]; ep->udc = udc; ep->desc = NULL; ep->ep.driver_data = NULL; ep->ep.name = ep_info[i].name; ep->ep.caps = ep_info[i].caps; ep->ep.ops = &nbu2ss_ep_ops; usb_ep_set_maxpacket_limit(&ep->ep, i == 0 ? EP0_PACKETSIZE : EP_PACKETSIZE); list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); INIT_LIST_HEAD(&ep->queue); } list_del_init(&udc->ep[0].ep.ep_list); } /*-------------------------------------------------------------------------*/ /* platform_driver */ static int nbu2ss_drv_contest_init(struct platform_device *pdev, struct nbu2ss_udc *udc) { spin_lock_init(&udc->lock); udc->dev = &pdev->dev; udc->gadget.is_selfpowered = 1; udc->devstate = USB_STATE_NOTATTACHED; udc->pdev = pdev; udc->mA = 0; udc->pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32); /* init Endpoint */ nbu2ss_drv_ep_init(udc); /* init Gadget */ udc->gadget.ops = &nbu2ss_gadget_ops; udc->gadget.ep0 = &udc->ep[0].ep; udc->gadget.speed = USB_SPEED_UNKNOWN; udc->gadget.name = driver_name; /* udc->gadget.is_dualspeed = 1; */ device_initialize(&udc->gadget.dev); dev_set_name(&udc->gadget.dev, "gadget"); udc->gadget.dev.parent = &pdev->dev; udc->gadget.dev.dma_mask = pdev->dev.dma_mask; return 0; } /* * probe - binds to the platform device */ static int nbu2ss_drv_probe(struct platform_device *pdev) { int status = -ENODEV; struct nbu2ss_udc *udc; int irq; void __iomem *mmio_base; udc = &udc_controller; memset(udc, 0, sizeof(struct nbu2ss_udc)); platform_set_drvdata(pdev, udc); /* require I/O memory and IRQ to be provided as resources */ mmio_base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(mmio_base)) return PTR_ERR(mmio_base); irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; status = devm_request_irq(&pdev->dev, irq, _nbu2ss_udc_irq, 0, driver_name, udc); /* IO Memory */ udc->p_regs = (struct fc_regs __iomem *)mmio_base; /* USB Function Controller Interrupt */ if (status != 0) { dev_err(udc->dev, "request_irq(USB_UDC_IRQ_1) failed\n"); return status; } /* Driver Initialization */ status = nbu2ss_drv_contest_init(pdev, udc); if (status < 0) { /* Error */ return status; } /* VBUS Interrupt */ vbus_irq = gpiod_to_irq(vbus_gpio); irq_set_irq_type(vbus_irq, IRQ_TYPE_EDGE_BOTH); status = request_irq(vbus_irq, _nbu2ss_vbus_irq, IRQF_SHARED, driver_name, udc); if (status != 0) { dev_err(udc->dev, "request_irq(vbus_irq) failed\n"); return status; } return status; } /*-------------------------------------------------------------------------*/ static void nbu2ss_drv_shutdown(struct platform_device *pdev) { struct nbu2ss_udc *udc; udc = platform_get_drvdata(pdev); if (!udc) return; _nbu2ss_disable_controller(udc); } /*-------------------------------------------------------------------------*/ static int nbu2ss_drv_remove(struct platform_device *pdev) { struct nbu2ss_udc *udc; struct nbu2ss_ep *ep; int i; udc = &udc_controller; for (i = 0; i < NUM_ENDPOINTS; i++) { ep = &udc->ep[i]; if (ep->virt_buf) dma_free_coherent(NULL, PAGE_SIZE, (void *)ep->virt_buf, ep->phys_buf); } /* Interrupt Handler - Release */ free_irq(vbus_irq, udc); return 0; } /*-------------------------------------------------------------------------*/ static int nbu2ss_drv_suspend(struct platform_device *pdev, pm_message_t state) { struct nbu2ss_udc *udc; udc = platform_get_drvdata(pdev); if (!udc) return 0; if (udc->vbus_active) { udc->vbus_active = 0; udc->devstate = USB_STATE_NOTATTACHED; udc->linux_suspended = 1; if (udc->usb_suspended) { udc->usb_suspended = 0; _nbu2ss_reset_controller(udc); } _nbu2ss_quiesce(udc); } _nbu2ss_disable_controller(udc); return 0; } /*-------------------------------------------------------------------------*/ static int nbu2ss_drv_resume(struct platform_device *pdev) { u32 data; struct nbu2ss_udc *udc; udc = platform_get_drvdata(pdev); if (!udc) return 0; data = gpiod_get_value(vbus_gpio); if (data) { udc->vbus_active = 1; udc->devstate = USB_STATE_POWERED; _nbu2ss_enable_controller(udc); _nbu2ss_pullup(udc, 1); } udc->linux_suspended = 0; return 0; } static struct platform_driver udc_driver = { .probe = nbu2ss_drv_probe, .shutdown = nbu2ss_drv_shutdown, .remove = nbu2ss_drv_remove, .suspend = nbu2ss_drv_suspend, .resume = nbu2ss_drv_resume, .driver = { .name = driver_name, }, }; module_platform_driver(udc_driver); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR("Renesas Electronics Corporation"); MODULE_LICENSE("GPL");
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