/* * R8A66597 UDC (USB gadget) * * Copyright (C) 2006-2009 Renesas Solutions Corp. * * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; version 2 of the License. */ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/io.h> #include <linux/platform_device.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/dma-mapping.h> #include <linux/usb/ch9.h> #include <linux/usb/gadget.h> #include "r8a66597-udc.h" #define DRIVER_VERSION "2011-09-26" static const char udc_name[] = "r8a66597_udc"; static const char *r8a66597_ep_name[] = { "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7", "ep8", "ep9", }; static void init_controller(struct r8a66597 *r8a66597); static void disable_controller(struct r8a66597 *r8a66597); static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req); static void irq_packet_write(struct r8a66597_ep *ep, struct r8a66597_request *req); static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags); static void transfer_complete(struct r8a66597_ep *ep, struct r8a66597_request *req, int status); /*-------------------------------------------------------------------------*/ static inline u16 get_usb_speed(struct r8a66597 *r8a66597) { return r8a66597_read(r8a66597, DVSTCTR0) & RHST; } static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum, unsigned long reg) { u16 tmp; tmp = r8a66597_read(r8a66597, INTENB0); r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0); r8a66597_bset(r8a66597, (1 << pipenum), reg); r8a66597_write(r8a66597, tmp, INTENB0); } static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum, unsigned long reg) { u16 tmp; tmp = r8a66597_read(r8a66597, INTENB0); r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0); r8a66597_bclr(r8a66597, (1 << pipenum), reg); r8a66597_write(r8a66597, tmp, INTENB0); } static void r8a66597_usb_connect(struct r8a66597 *r8a66597) { r8a66597_bset(r8a66597, CTRE, INTENB0); r8a66597_bset(r8a66597, BEMPE | BRDYE, INTENB0); r8a66597_bset(r8a66597, DPRPU, SYSCFG0); } static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597) __releases(r8a66597->lock) __acquires(r8a66597->lock) { r8a66597_bclr(r8a66597, CTRE, INTENB0); r8a66597_bclr(r8a66597, BEMPE | BRDYE, INTENB0); r8a66597_bclr(r8a66597, DPRPU, SYSCFG0); r8a66597->gadget.speed = USB_SPEED_UNKNOWN; spin_unlock(&r8a66597->lock); r8a66597->driver->disconnect(&r8a66597->gadget); spin_lock(&r8a66597->lock); disable_controller(r8a66597); init_controller(r8a66597); r8a66597_bset(r8a66597, VBSE, INTENB0); INIT_LIST_HEAD(&r8a66597->ep[0].queue); } static inline u16 control_reg_get_pid(struct r8a66597 *r8a66597, u16 pipenum) { u16 pid = 0; unsigned long offset; if (pipenum == 0) { pid = r8a66597_read(r8a66597, DCPCTR) & PID; } else if (pipenum < R8A66597_MAX_NUM_PIPE) { offset = get_pipectr_addr(pipenum); pid = r8a66597_read(r8a66597, offset) & PID; } else { dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num (%d)\n", pipenum); } return pid; } static inline void control_reg_set_pid(struct r8a66597 *r8a66597, u16 pipenum, u16 pid) { unsigned long offset; if (pipenum == 0) { r8a66597_mdfy(r8a66597, pid, PID, DCPCTR); } else if (pipenum < R8A66597_MAX_NUM_PIPE) { offset = get_pipectr_addr(pipenum); r8a66597_mdfy(r8a66597, pid, PID, offset); } else { dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num (%d)\n", pipenum); } } static inline void pipe_start(struct r8a66597 *r8a66597, u16 pipenum) { control_reg_set_pid(r8a66597, pipenum, PID_BUF); } static inline void pipe_stop(struct r8a66597 *r8a66597, u16 pipenum) { control_reg_set_pid(r8a66597, pipenum, PID_NAK); } static inline void pipe_stall(struct r8a66597 *r8a66597, u16 pipenum) { control_reg_set_pid(r8a66597, pipenum, PID_STALL); } static inline u16 control_reg_get(struct r8a66597 *r8a66597, u16 pipenum) { u16 ret = 0; unsigned long offset; if (pipenum == 0) { ret = r8a66597_read(r8a66597, DCPCTR); } else if (pipenum < R8A66597_MAX_NUM_PIPE) { offset = get_pipectr_addr(pipenum); ret = r8a66597_read(r8a66597, offset); } else { dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num (%d)\n", pipenum); } return ret; } static inline void control_reg_sqclr(struct r8a66597 *r8a66597, u16 pipenum) { unsigned long offset; pipe_stop(r8a66597, pipenum); if (pipenum == 0) { r8a66597_bset(r8a66597, SQCLR, DCPCTR); } else if (pipenum < R8A66597_MAX_NUM_PIPE) { offset = get_pipectr_addr(pipenum); r8a66597_bset(r8a66597, SQCLR, offset); } else { dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num (%d)\n", pipenum); } } static void control_reg_sqset(struct r8a66597 *r8a66597, u16 pipenum) { unsigned long offset; pipe_stop(r8a66597, pipenum); if (pipenum == 0) { r8a66597_bset(r8a66597, SQSET, DCPCTR); } else if (pipenum < R8A66597_MAX_NUM_PIPE) { offset = get_pipectr_addr(pipenum); r8a66597_bset(r8a66597, SQSET, offset); } else { dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num(%d)\n", pipenum); } } static u16 control_reg_sqmon(struct r8a66597 *r8a66597, u16 pipenum) { unsigned long offset; if (pipenum == 0) { return r8a66597_read(r8a66597, DCPCTR) & SQMON; } else if (pipenum < R8A66597_MAX_NUM_PIPE) { offset = get_pipectr_addr(pipenum); return r8a66597_read(r8a66597, offset) & SQMON; } else { dev_err(r8a66597_to_dev(r8a66597), "unexpect pipe num(%d)\n", pipenum); } return 0; } static u16 save_usb_toggle(struct r8a66597 *r8a66597, u16 pipenum) { return control_reg_sqmon(r8a66597, pipenum); } static void restore_usb_toggle(struct r8a66597 *r8a66597, u16 pipenum, u16 toggle) { if (toggle) control_reg_sqset(r8a66597, pipenum); else control_reg_sqclr(r8a66597, pipenum); } static inline int get_buffer_size(struct r8a66597 *r8a66597, u16 pipenum) { u16 tmp; int size; if (pipenum == 0) { tmp = r8a66597_read(r8a66597, DCPCFG); if ((tmp & R8A66597_CNTMD) != 0) size = 256; else { tmp = r8a66597_read(r8a66597, DCPMAXP); size = tmp & MAXP; } } else { r8a66597_write(r8a66597, pipenum, PIPESEL); tmp = r8a66597_read(r8a66597, PIPECFG); if ((tmp & R8A66597_CNTMD) != 0) { tmp = r8a66597_read(r8a66597, PIPEBUF); size = ((tmp >> 10) + 1) * 64; } else { tmp = r8a66597_read(r8a66597, PIPEMAXP); size = tmp & MXPS; } } return size; } static inline unsigned short mbw_value(struct r8a66597 *r8a66597) { if (r8a66597->pdata->on_chip) return MBW_32; else return MBW_16; } static void r8a66597_change_curpipe(struct r8a66597 *r8a66597, u16 pipenum, u16 isel, u16 fifosel) { u16 tmp, mask, loop; int i = 0; if (!pipenum) { mask = ISEL | CURPIPE; loop = isel; } else { mask = CURPIPE; loop = pipenum; } r8a66597_mdfy(r8a66597, loop, mask, fifosel); do { tmp = r8a66597_read(r8a66597, fifosel); if (i++ > 1000000) { dev_err(r8a66597_to_dev(r8a66597), "r8a66597: register%x, loop %x " "is timeout\n", fifosel, loop); break; } ndelay(1); } while ((tmp & mask) != loop); } static inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum) { struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum]; if (ep->use_dma) r8a66597_bclr(r8a66597, DREQE, ep->fifosel); r8a66597_mdfy(r8a66597, pipenum, CURPIPE, ep->fifosel); ndelay(450); if (r8a66597_is_sudmac(r8a66597) && ep->use_dma) r8a66597_bclr(r8a66597, mbw_value(r8a66597), ep->fifosel); else r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel); if (ep->use_dma) r8a66597_bset(r8a66597, DREQE, ep->fifosel); } static int pipe_buffer_setting(struct r8a66597 *r8a66597, struct r8a66597_pipe_info *info) { u16 bufnum = 0, buf_bsize = 0; u16 pipecfg = 0; if (info->pipe == 0) return -EINVAL; r8a66597_write(r8a66597, info->pipe, PIPESEL); if (info->dir_in) pipecfg |= R8A66597_DIR; pipecfg |= info->type; pipecfg |= info->epnum; switch (info->type) { case R8A66597_INT: bufnum = 4 + (info->pipe - R8A66597_BASE_PIPENUM_INT); buf_bsize = 0; break; case R8A66597_BULK: /* isochronous pipes may be used as bulk pipes */ if (info->pipe >= R8A66597_BASE_PIPENUM_BULK) bufnum = info->pipe - R8A66597_BASE_PIPENUM_BULK; else bufnum = info->pipe - R8A66597_BASE_PIPENUM_ISOC; bufnum = R8A66597_BASE_BUFNUM + (bufnum * 16); buf_bsize = 7; pipecfg |= R8A66597_DBLB; if (!info->dir_in) pipecfg |= R8A66597_SHTNAK; break; case R8A66597_ISO: bufnum = R8A66597_BASE_BUFNUM + (info->pipe - R8A66597_BASE_PIPENUM_ISOC) * 16; buf_bsize = 7; break; } if (buf_bsize && ((bufnum + 16) >= R8A66597_MAX_BUFNUM)) { pr_err("r8a66597 pipe memory is insufficient\n"); return -ENOMEM; } r8a66597_write(r8a66597, pipecfg, PIPECFG); r8a66597_write(r8a66597, (buf_bsize << 10) | (bufnum), PIPEBUF); r8a66597_write(r8a66597, info->maxpacket, PIPEMAXP); if (info->interval) info->interval--; r8a66597_write(r8a66597, info->interval, PIPEPERI); return 0; } static void pipe_buffer_release(struct r8a66597 *r8a66597, struct r8a66597_pipe_info *info) { if (info->pipe == 0) return; if (is_bulk_pipe(info->pipe)) { r8a66597->bulk--; } else if (is_interrupt_pipe(info->pipe)) { r8a66597->interrupt--; } else if (is_isoc_pipe(info->pipe)) { r8a66597->isochronous--; if (info->type == R8A66597_BULK) r8a66597->bulk--; } else { dev_err(r8a66597_to_dev(r8a66597), "ep_release: unexpect pipenum (%d)\n", info->pipe); } } static void pipe_initialize(struct r8a66597_ep *ep) { struct r8a66597 *r8a66597 = ep->r8a66597; r8a66597_mdfy(r8a66597, 0, CURPIPE, ep->fifosel); r8a66597_write(r8a66597, ACLRM, ep->pipectr); r8a66597_write(r8a66597, 0, ep->pipectr); r8a66597_write(r8a66597, SQCLR, ep->pipectr); if (ep->use_dma) { r8a66597_mdfy(r8a66597, ep->pipenum, CURPIPE, ep->fifosel); ndelay(450); r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel); } } static void r8a66597_ep_setting(struct r8a66597 *r8a66597, struct r8a66597_ep *ep, const struct usb_endpoint_descriptor *desc, u16 pipenum, int dma) { ep->use_dma = 0; ep->fifoaddr = CFIFO; ep->fifosel = CFIFOSEL; ep->fifoctr = CFIFOCTR; ep->pipectr = get_pipectr_addr(pipenum); if (is_bulk_pipe(pipenum) || is_isoc_pipe(pipenum)) { ep->pipetre = get_pipetre_addr(pipenum); ep->pipetrn = get_pipetrn_addr(pipenum); } else { ep->pipetre = 0; ep->pipetrn = 0; } ep->pipenum = pipenum; ep->ep.maxpacket = usb_endpoint_maxp(desc); r8a66597->pipenum2ep[pipenum] = ep; r8a66597->epaddr2ep[desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK] = ep; INIT_LIST_HEAD(&ep->queue); } static void r8a66597_ep_release(struct r8a66597_ep *ep) { struct r8a66597 *r8a66597 = ep->r8a66597; u16 pipenum = ep->pipenum; if (pipenum == 0) return; if (ep->use_dma) r8a66597->num_dma--; ep->pipenum = 0; ep->busy = 0; ep->use_dma = 0; } static int alloc_pipe_config(struct r8a66597_ep *ep, const struct usb_endpoint_descriptor *desc) { struct r8a66597 *r8a66597 = ep->r8a66597; struct r8a66597_pipe_info info; int dma = 0; unsigned char *counter; int ret; ep->desc = desc; if (ep->pipenum) /* already allocated pipe */ return 0; switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { case USB_ENDPOINT_XFER_BULK: if (r8a66597->bulk >= R8A66597_MAX_NUM_BULK) { if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) { dev_err(r8a66597_to_dev(r8a66597), "bulk pipe is insufficient\n"); return -ENODEV; } else { info.pipe = R8A66597_BASE_PIPENUM_ISOC + r8a66597->isochronous; counter = &r8a66597->isochronous; } } else { info.pipe = R8A66597_BASE_PIPENUM_BULK + r8a66597->bulk; counter = &r8a66597->bulk; } info.type = R8A66597_BULK; dma = 1; break; case USB_ENDPOINT_XFER_INT: if (r8a66597->interrupt >= R8A66597_MAX_NUM_INT) { dev_err(r8a66597_to_dev(r8a66597), "interrupt pipe is insufficient\n"); return -ENODEV; } info.pipe = R8A66597_BASE_PIPENUM_INT + r8a66597->interrupt; info.type = R8A66597_INT; counter = &r8a66597->interrupt; break; case USB_ENDPOINT_XFER_ISOC: if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) { dev_err(r8a66597_to_dev(r8a66597), "isochronous pipe is insufficient\n"); return -ENODEV; } info.pipe = R8A66597_BASE_PIPENUM_ISOC + r8a66597->isochronous; info.type = R8A66597_ISO; counter = &r8a66597->isochronous; break; default: dev_err(r8a66597_to_dev(r8a66597), "unexpect xfer type\n"); return -EINVAL; } ep->type = info.type; info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; info.maxpacket = usb_endpoint_maxp(desc); info.interval = desc->bInterval; if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) info.dir_in = 1; else info.dir_in = 0; ret = pipe_buffer_setting(r8a66597, &info); if (ret < 0) { dev_err(r8a66597_to_dev(r8a66597), "pipe_buffer_setting fail\n"); return ret; } (*counter)++; if ((counter == &r8a66597->isochronous) && info.type == R8A66597_BULK) r8a66597->bulk++; r8a66597_ep_setting(r8a66597, ep, desc, info.pipe, dma); pipe_initialize(ep); return 0; } static int free_pipe_config(struct r8a66597_ep *ep) { struct r8a66597 *r8a66597 = ep->r8a66597; struct r8a66597_pipe_info info; info.pipe = ep->pipenum; info.type = ep->type; pipe_buffer_release(r8a66597, &info); r8a66597_ep_release(ep); return 0; } /*-------------------------------------------------------------------------*/ static void pipe_irq_enable(struct r8a66597 *r8a66597, u16 pipenum) { enable_irq_ready(r8a66597, pipenum); enable_irq_nrdy(r8a66597, pipenum); } static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum) { disable_irq_ready(r8a66597, pipenum); disable_irq_nrdy(r8a66597, pipenum); } /* if complete is true, gadget driver complete function is not call */ static void control_end(struct r8a66597 *r8a66597, unsigned ccpl) { r8a66597->ep[0].internal_ccpl = ccpl; pipe_start(r8a66597, 0); r8a66597_bset(r8a66597, CCPL, DCPCTR); } static void start_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req) { struct r8a66597 *r8a66597 = ep->r8a66597; pipe_change(r8a66597, ep->pipenum); r8a66597_mdfy(r8a66597, ISEL, (ISEL | CURPIPE), CFIFOSEL); r8a66597_write(r8a66597, BCLR, ep->fifoctr); if (req->req.length == 0) { r8a66597_bset(r8a66597, BVAL, ep->fifoctr); pipe_start(r8a66597, 0); transfer_complete(ep, req, 0); } else { r8a66597_write(r8a66597, ~BEMP0, BEMPSTS); irq_ep0_write(ep, req); } } static void disable_fifosel(struct r8a66597 *r8a66597, u16 pipenum, u16 fifosel) { u16 tmp; tmp = r8a66597_read(r8a66597, fifosel) & CURPIPE; if (tmp == pipenum) r8a66597_change_curpipe(r8a66597, 0, 0, fifosel); } static void change_bfre_mode(struct r8a66597 *r8a66597, u16 pipenum, int enable) { struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum]; u16 tmp, toggle; /* check current BFRE bit */ r8a66597_write(r8a66597, pipenum, PIPESEL); tmp = r8a66597_read(r8a66597, PIPECFG) & R8A66597_BFRE; if ((enable && tmp) || (!enable && !tmp)) return; /* change BFRE bit */ pipe_stop(r8a66597, pipenum); disable_fifosel(r8a66597, pipenum, CFIFOSEL); disable_fifosel(r8a66597, pipenum, D0FIFOSEL); disable_fifosel(r8a66597, pipenum, D1FIFOSEL); toggle = save_usb_toggle(r8a66597, pipenum); r8a66597_write(r8a66597, pipenum, PIPESEL); if (enable) r8a66597_bset(r8a66597, R8A66597_BFRE, PIPECFG); else r8a66597_bclr(r8a66597, R8A66597_BFRE, PIPECFG); /* initialize for internal BFRE flag */ r8a66597_bset(r8a66597, ACLRM, ep->pipectr); r8a66597_bclr(r8a66597, ACLRM, ep->pipectr); restore_usb_toggle(r8a66597, pipenum, toggle); } static int sudmac_alloc_channel(struct r8a66597 *r8a66597, struct r8a66597_ep *ep, struct r8a66597_request *req) { struct r8a66597_dma *dma; if (!r8a66597_is_sudmac(r8a66597)) return -ENODEV; /* Check transfer type */ if (!is_bulk_pipe(ep->pipenum)) return -EIO; if (r8a66597->dma.used) return -EBUSY; /* set SUDMAC parameters */ dma = &r8a66597->dma; dma->used = 1; if (ep->desc->bEndpointAddress & USB_DIR_IN) { dma->dir = 1; } else { dma->dir = 0; change_bfre_mode(r8a66597, ep->pipenum, 1); } /* set r8a66597_ep paramters */ ep->use_dma = 1; ep->dma = dma; ep->fifoaddr = D0FIFO; ep->fifosel = D0FIFOSEL; ep->fifoctr = D0FIFOCTR; /* dma mapping */ req->req.dma = dma_map_single(r8a66597_to_dev(ep->r8a66597), req->req.buf, req->req.length, dma->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE); return 0; } static void sudmac_free_channel(struct r8a66597 *r8a66597, struct r8a66597_ep *ep, struct r8a66597_request *req) { if (!r8a66597_is_sudmac(r8a66597)) return; dma_unmap_single(r8a66597_to_dev(ep->r8a66597), req->req.dma, req->req.length, ep->dma->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE); r8a66597_bclr(r8a66597, DREQE, ep->fifosel); r8a66597_change_curpipe(r8a66597, 0, 0, ep->fifosel); ep->dma->used = 0; ep->use_dma = 0; ep->fifoaddr = CFIFO; ep->fifosel = CFIFOSEL; ep->fifoctr = CFIFOCTR; } static void sudmac_start(struct r8a66597 *r8a66597, struct r8a66597_ep *ep, struct r8a66597_request *req) { BUG_ON(req->req.length == 0); r8a66597_sudmac_write(r8a66597, LBA_WAIT, CH0CFG); r8a66597_sudmac_write(r8a66597, req->req.dma, CH0BA); r8a66597_sudmac_write(r8a66597, req->req.length, CH0BBC); r8a66597_sudmac_write(r8a66597, CH0ENDE, DINTCTRL); r8a66597_sudmac_write(r8a66597, DEN, CH0DEN); } static void start_packet_write(struct r8a66597_ep *ep, struct r8a66597_request *req) { struct r8a66597 *r8a66597 = ep->r8a66597; u16 tmp; pipe_change(r8a66597, ep->pipenum); disable_irq_empty(r8a66597, ep->pipenum); pipe_start(r8a66597, ep->pipenum); if (req->req.length == 0) { transfer_complete(ep, req, 0); } else { r8a66597_write(r8a66597, ~(1 << ep->pipenum), BRDYSTS); if (sudmac_alloc_channel(r8a66597, ep, req) < 0) { /* PIO mode */ pipe_change(r8a66597, ep->pipenum); disable_irq_empty(r8a66597, ep->pipenum); pipe_start(r8a66597, ep->pipenum); tmp = r8a66597_read(r8a66597, ep->fifoctr); if (unlikely((tmp & FRDY) == 0)) pipe_irq_enable(r8a66597, ep->pipenum); else irq_packet_write(ep, req); } else { /* DMA mode */ pipe_change(r8a66597, ep->pipenum); disable_irq_nrdy(r8a66597, ep->pipenum); pipe_start(r8a66597, ep->pipenum); enable_irq_nrdy(r8a66597, ep->pipenum); sudmac_start(r8a66597, ep, req); } } } static void start_packet_read(struct r8a66597_ep *ep, struct r8a66597_request *req) { struct r8a66597 *r8a66597 = ep->r8a66597; u16 pipenum = ep->pipenum; if (ep->pipenum == 0) { r8a66597_mdfy(r8a66597, 0, (ISEL | CURPIPE), CFIFOSEL); r8a66597_write(r8a66597, BCLR, ep->fifoctr); pipe_start(r8a66597, pipenum); pipe_irq_enable(r8a66597, pipenum); } else { pipe_stop(r8a66597, pipenum); if (ep->pipetre) { enable_irq_nrdy(r8a66597, pipenum); r8a66597_write(r8a66597, TRCLR, ep->pipetre); r8a66597_write(r8a66597, DIV_ROUND_UP(req->req.length, ep->ep.maxpacket), ep->pipetrn); r8a66597_bset(r8a66597, TRENB, ep->pipetre); } if (sudmac_alloc_channel(r8a66597, ep, req) < 0) { /* PIO mode */ change_bfre_mode(r8a66597, ep->pipenum, 0); pipe_start(r8a66597, pipenum); /* trigger once */ pipe_irq_enable(r8a66597, pipenum); } else { pipe_change(r8a66597, pipenum); sudmac_start(r8a66597, ep, req); pipe_start(r8a66597, pipenum); /* trigger once */ } } } static void start_packet(struct r8a66597_ep *ep, struct r8a66597_request *req) { if (ep->desc->bEndpointAddress & USB_DIR_IN) start_packet_write(ep, req); else start_packet_read(ep, req); } static void start_ep0(struct r8a66597_ep *ep, struct r8a66597_request *req) { u16 ctsq; ctsq = r8a66597_read(ep->r8a66597, INTSTS0) & CTSQ; switch (ctsq) { case CS_RDDS: start_ep0_write(ep, req); break; case CS_WRDS: start_packet_read(ep, req); break; case CS_WRND: control_end(ep->r8a66597, 0); break; default: dev_err(r8a66597_to_dev(ep->r8a66597), "start_ep0: unexpect ctsq(%x)\n", ctsq); break; } } static void init_controller(struct r8a66597 *r8a66597) { u16 vif = r8a66597->pdata->vif ? LDRV : 0; u16 irq_sense = r8a66597->irq_sense_low ? INTL : 0; u16 endian = r8a66597->pdata->endian ? BIGEND : 0; if (r8a66597->pdata->on_chip) { if (r8a66597->pdata->buswait) r8a66597_write(r8a66597, r8a66597->pdata->buswait, SYSCFG1); else r8a66597_write(r8a66597, 0x0f, SYSCFG1); r8a66597_bset(r8a66597, HSE, SYSCFG0); r8a66597_bclr(r8a66597, USBE, SYSCFG0); r8a66597_bclr(r8a66597, DPRPU, SYSCFG0); r8a66597_bset(r8a66597, USBE, SYSCFG0); r8a66597_bset(r8a66597, SCKE, SYSCFG0); r8a66597_bset(r8a66597, irq_sense, INTENB1); r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, DMA0CFG); } else { r8a66597_bset(r8a66597, vif | endian, PINCFG); r8a66597_bset(r8a66597, HSE, SYSCFG0); /* High spd */ r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata), XTAL, SYSCFG0); r8a66597_bclr(r8a66597, USBE, SYSCFG0); r8a66597_bclr(r8a66597, DPRPU, SYSCFG0); r8a66597_bset(r8a66597, USBE, SYSCFG0); r8a66597_bset(r8a66597, XCKE, SYSCFG0); msleep(3); r8a66597_bset(r8a66597, PLLC, SYSCFG0); msleep(1); r8a66597_bset(r8a66597, SCKE, SYSCFG0); r8a66597_bset(r8a66597, irq_sense, INTENB1); r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, DMA0CFG); } } static void disable_controller(struct r8a66597 *r8a66597) { if (r8a66597->pdata->on_chip) { r8a66597_bset(r8a66597, SCKE, SYSCFG0); r8a66597_bclr(r8a66597, UTST, TESTMODE); /* disable interrupts */ r8a66597_write(r8a66597, 0, INTENB0); r8a66597_write(r8a66597, 0, INTENB1); r8a66597_write(r8a66597, 0, BRDYENB); r8a66597_write(r8a66597, 0, BEMPENB); r8a66597_write(r8a66597, 0, NRDYENB); /* clear status */ r8a66597_write(r8a66597, 0, BRDYSTS); r8a66597_write(r8a66597, 0, NRDYSTS); r8a66597_write(r8a66597, 0, BEMPSTS); r8a66597_bclr(r8a66597, USBE, SYSCFG0); r8a66597_bclr(r8a66597, SCKE, SYSCFG0); } else { r8a66597_bclr(r8a66597, UTST, TESTMODE); r8a66597_bclr(r8a66597, SCKE, SYSCFG0); udelay(1); r8a66597_bclr(r8a66597, PLLC, SYSCFG0); udelay(1); udelay(1); r8a66597_bclr(r8a66597, XCKE, SYSCFG0); } } static void r8a66597_start_xclock(struct r8a66597 *r8a66597) { u16 tmp; if (!r8a66597->pdata->on_chip) { tmp = r8a66597_read(r8a66597, SYSCFG0); if (!(tmp & XCKE)) r8a66597_bset(r8a66597, XCKE, SYSCFG0); } } static struct r8a66597_request *get_request_from_ep(struct r8a66597_ep *ep) { return list_entry(ep->queue.next, struct r8a66597_request, queue); } /*-------------------------------------------------------------------------*/ static void transfer_complete(struct r8a66597_ep *ep, struct r8a66597_request *req, int status) __releases(r8a66597->lock) __acquires(r8a66597->lock) { int restart = 0; if (unlikely(ep->pipenum == 0)) { if (ep->internal_ccpl) { ep->internal_ccpl = 0; return; } } list_del_init(&req->queue); if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN) req->req.status = -ESHUTDOWN; else req->req.status = status; if (!list_empty(&ep->queue)) restart = 1; if (ep->use_dma) sudmac_free_channel(ep->r8a66597, ep, req); spin_unlock(&ep->r8a66597->lock); req->req.complete(&ep->ep, &req->req); spin_lock(&ep->r8a66597->lock); if (restart) { req = get_request_from_ep(ep); if (ep->desc) start_packet(ep, req); } } static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req) { int i; u16 tmp; unsigned bufsize; size_t size; void *buf; u16 pipenum = ep->pipenum; struct r8a66597 *r8a66597 = ep->r8a66597; pipe_change(r8a66597, pipenum); r8a66597_bset(r8a66597, ISEL, ep->fifosel); i = 0; do { tmp = r8a66597_read(r8a66597, ep->fifoctr); if (i++ > 100000) { dev_err(r8a66597_to_dev(r8a66597), "pipe0 is busy. maybe cpu i/o bus " "conflict. please power off this controller."); return; } ndelay(1); } while ((tmp & FRDY) == 0); /* prepare parameters */ bufsize = get_buffer_size(r8a66597, pipenum); buf = req->req.buf + req->req.actual; size = min(bufsize, req->req.length - req->req.actual); /* write fifo */ if (req->req.buf) { if (size > 0) r8a66597_write_fifo(r8a66597, ep, buf, size); if ((size == 0) || ((size % ep->ep.maxpacket) != 0)) r8a66597_bset(r8a66597, BVAL, ep->fifoctr); } /* update parameters */ req->req.actual += size; /* check transfer finish */ if ((!req->req.zero && (req->req.actual == req->req.length)) || (size % ep->ep.maxpacket) || (size == 0)) { disable_irq_ready(r8a66597, pipenum); disable_irq_empty(r8a66597, pipenum); } else { disable_irq_ready(r8a66597, pipenum); enable_irq_empty(r8a66597, pipenum); } pipe_start(r8a66597, pipenum); } static void irq_packet_write(struct r8a66597_ep *ep, struct r8a66597_request *req) { u16 tmp; unsigned bufsize; size_t size; void *buf; u16 pipenum = ep->pipenum; struct r8a66597 *r8a66597 = ep->r8a66597; pipe_change(r8a66597, pipenum); tmp = r8a66597_read(r8a66597, ep->fifoctr); if (unlikely((tmp & FRDY) == 0)) { pipe_stop(r8a66597, pipenum); pipe_irq_disable(r8a66597, pipenum); dev_err(r8a66597_to_dev(r8a66597), "write fifo not ready. pipnum=%d\n", pipenum); return; } /* prepare parameters */ bufsize = get_buffer_size(r8a66597, pipenum); buf = req->req.buf + req->req.actual; size = min(bufsize, req->req.length - req->req.actual); /* write fifo */ if (req->req.buf) { r8a66597_write_fifo(r8a66597, ep, buf, size); if ((size == 0) || ((size % ep->ep.maxpacket) != 0) || ((bufsize != ep->ep.maxpacket) && (bufsize > size))) r8a66597_bset(r8a66597, BVAL, ep->fifoctr); } /* update parameters */ req->req.actual += size; /* check transfer finish */ if ((!req->req.zero && (req->req.actual == req->req.length)) || (size % ep->ep.maxpacket) || (size == 0)) { disable_irq_ready(r8a66597, pipenum); enable_irq_empty(r8a66597, pipenum); } else { disable_irq_empty(r8a66597, pipenum); pipe_irq_enable(r8a66597, pipenum); } } static void irq_packet_read(struct r8a66597_ep *ep, struct r8a66597_request *req) { u16 tmp; int rcv_len, bufsize, req_len; int size; void *buf; u16 pipenum = ep->pipenum; struct r8a66597 *r8a66597 = ep->r8a66597; int finish = 0; pipe_change(r8a66597, pipenum); tmp = r8a66597_read(r8a66597, ep->fifoctr); if (unlikely((tmp & FRDY) == 0)) { req->req.status = -EPIPE; pipe_stop(r8a66597, pipenum); pipe_irq_disable(r8a66597, pipenum); dev_err(r8a66597_to_dev(r8a66597), "read fifo not ready"); return; } /* prepare parameters */ rcv_len = tmp & DTLN; bufsize = get_buffer_size(r8a66597, pipenum); buf = req->req.buf + req->req.actual; req_len = req->req.length - req->req.actual; if (rcv_len < bufsize) size = min(rcv_len, req_len); else size = min(bufsize, req_len); /* update parameters */ req->req.actual += size; /* check transfer finish */ if ((!req->req.zero && (req->req.actual == req->req.length)) || (size % ep->ep.maxpacket) || (size == 0)) { pipe_stop(r8a66597, pipenum); pipe_irq_disable(r8a66597, pipenum); finish = 1; } /* read fifo */ if (req->req.buf) { if (size == 0) r8a66597_write(r8a66597, BCLR, ep->fifoctr); else r8a66597_read_fifo(r8a66597, ep->fifoaddr, buf, size); } if ((ep->pipenum != 0) && finish) transfer_complete(ep, req, 0); } static void irq_pipe_ready(struct r8a66597 *r8a66597, u16 status, u16 enb) { u16 check; u16 pipenum; struct r8a66597_ep *ep; struct r8a66597_request *req; if ((status & BRDY0) && (enb & BRDY0)) { r8a66597_write(r8a66597, ~BRDY0, BRDYSTS); r8a66597_mdfy(r8a66597, 0, CURPIPE, CFIFOSEL); ep = &r8a66597->ep[0]; req = get_request_from_ep(ep); irq_packet_read(ep, req); } else { for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) { check = 1 << pipenum; if ((status & check) && (enb & check)) { r8a66597_write(r8a66597, ~check, BRDYSTS); ep = r8a66597->pipenum2ep[pipenum]; req = get_request_from_ep(ep); if (ep->desc->bEndpointAddress & USB_DIR_IN) irq_packet_write(ep, req); else irq_packet_read(ep, req); } } } } static void irq_pipe_empty(struct r8a66597 *r8a66597, u16 status, u16 enb) { u16 tmp; u16 check; u16 pipenum; struct r8a66597_ep *ep; struct r8a66597_request *req; if ((status & BEMP0) && (enb & BEMP0)) { r8a66597_write(r8a66597, ~BEMP0, BEMPSTS); ep = &r8a66597->ep[0]; req = get_request_from_ep(ep); irq_ep0_write(ep, req); } else { for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) { check = 1 << pipenum; if ((status & check) && (enb & check)) { r8a66597_write(r8a66597, ~check, BEMPSTS); tmp = control_reg_get(r8a66597, pipenum); if ((tmp & INBUFM) == 0) { disable_irq_empty(r8a66597, pipenum); pipe_irq_disable(r8a66597, pipenum); pipe_stop(r8a66597, pipenum); ep = r8a66597->pipenum2ep[pipenum]; req = get_request_from_ep(ep); if (!list_empty(&ep->queue)) transfer_complete(ep, req, 0); } } } } } static void get_status(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl) __releases(r8a66597->lock) __acquires(r8a66597->lock) { struct r8a66597_ep *ep; u16 pid; u16 status = 0; u16 w_index = le16_to_cpu(ctrl->wIndex); switch (ctrl->bRequestType & USB_RECIP_MASK) { case USB_RECIP_DEVICE: status = 1 << USB_DEVICE_SELF_POWERED; break; case USB_RECIP_INTERFACE: status = 0; break; case USB_RECIP_ENDPOINT: ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK]; pid = control_reg_get_pid(r8a66597, ep->pipenum); if (pid == PID_STALL) status = 1 << USB_ENDPOINT_HALT; else status = 0; break; default: pipe_stall(r8a66597, 0); return; /* exit */ } r8a66597->ep0_data = cpu_to_le16(status); r8a66597->ep0_req->buf = &r8a66597->ep0_data; r8a66597->ep0_req->length = 2; /* AV: what happens if we get called again before that gets through? */ spin_unlock(&r8a66597->lock); r8a66597_queue(r8a66597->gadget.ep0, r8a66597->ep0_req, GFP_KERNEL); spin_lock(&r8a66597->lock); } static void clear_feature(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl) { switch (ctrl->bRequestType & USB_RECIP_MASK) { case USB_RECIP_DEVICE: control_end(r8a66597, 1); break; case USB_RECIP_INTERFACE: control_end(r8a66597, 1); break; case USB_RECIP_ENDPOINT: { struct r8a66597_ep *ep; struct r8a66597_request *req; u16 w_index = le16_to_cpu(ctrl->wIndex); ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK]; if (!ep->wedge) { pipe_stop(r8a66597, ep->pipenum); control_reg_sqclr(r8a66597, ep->pipenum); spin_unlock(&r8a66597->lock); usb_ep_clear_halt(&ep->ep); spin_lock(&r8a66597->lock); } control_end(r8a66597, 1); req = get_request_from_ep(ep); if (ep->busy) { ep->busy = 0; if (list_empty(&ep->queue)) break; start_packet(ep, req); } else if (!list_empty(&ep->queue)) pipe_start(r8a66597, ep->pipenum); } break; default: pipe_stall(r8a66597, 0); break; } } static void set_feature(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl) { u16 tmp; int timeout = 3000; switch (ctrl->bRequestType & USB_RECIP_MASK) { case USB_RECIP_DEVICE: switch (le16_to_cpu(ctrl->wValue)) { case USB_DEVICE_TEST_MODE: control_end(r8a66597, 1); /* Wait for the completion of status stage */ do { tmp = r8a66597_read(r8a66597, INTSTS0) & CTSQ; udelay(1); } while (tmp != CS_IDST || timeout-- > 0); if (tmp == CS_IDST) r8a66597_bset(r8a66597, le16_to_cpu(ctrl->wIndex >> 8), TESTMODE); break; default: pipe_stall(r8a66597, 0); break; } break; case USB_RECIP_INTERFACE: control_end(r8a66597, 1); break; case USB_RECIP_ENDPOINT: { struct r8a66597_ep *ep; u16 w_index = le16_to_cpu(ctrl->wIndex); ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK]; pipe_stall(r8a66597, ep->pipenum); control_end(r8a66597, 1); } break; default: pipe_stall(r8a66597, 0); break; } } /* if return value is true, call class driver's setup() */ static int setup_packet(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl) { u16 *p = (u16 *)ctrl; unsigned long offset = USBREQ; int i, ret = 0; /* read fifo */ r8a66597_write(r8a66597, ~VALID, INTSTS0); for (i = 0; i < 4; i++) p[i] = r8a66597_read(r8a66597, offset + i*2); /* check request */ if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { switch (ctrl->bRequest) { case USB_REQ_GET_STATUS: get_status(r8a66597, ctrl); break; case USB_REQ_CLEAR_FEATURE: clear_feature(r8a66597, ctrl); break; case USB_REQ_SET_FEATURE: set_feature(r8a66597, ctrl); break; default: ret = 1; break; } } else ret = 1; return ret; } static void r8a66597_update_usb_speed(struct r8a66597 *r8a66597) { u16 speed = get_usb_speed(r8a66597); switch (speed) { case HSMODE: r8a66597->gadget.speed = USB_SPEED_HIGH; break; case FSMODE: r8a66597->gadget.speed = USB_SPEED_FULL; break; default: r8a66597->gadget.speed = USB_SPEED_UNKNOWN; dev_err(r8a66597_to_dev(r8a66597), "USB speed unknown\n"); } } static void irq_device_state(struct r8a66597 *r8a66597) { u16 dvsq; dvsq = r8a66597_read(r8a66597, INTSTS0) & DVSQ; r8a66597_write(r8a66597, ~DVST, INTSTS0); if (dvsq == DS_DFLT) { /* bus reset */ spin_unlock(&r8a66597->lock); r8a66597->driver->disconnect(&r8a66597->gadget); spin_lock(&r8a66597->lock); r8a66597_update_usb_speed(r8a66597); } if (r8a66597->old_dvsq == DS_CNFG && dvsq != DS_CNFG) r8a66597_update_usb_speed(r8a66597); if ((dvsq == DS_CNFG || dvsq == DS_ADDS) && r8a66597->gadget.speed == USB_SPEED_UNKNOWN) r8a66597_update_usb_speed(r8a66597); r8a66597->old_dvsq = dvsq; } static void irq_control_stage(struct r8a66597 *r8a66597) __releases(r8a66597->lock) __acquires(r8a66597->lock) { struct usb_ctrlrequest ctrl; u16 ctsq; ctsq = r8a66597_read(r8a66597, INTSTS0) & CTSQ; r8a66597_write(r8a66597, ~CTRT, INTSTS0); switch (ctsq) { case CS_IDST: { struct r8a66597_ep *ep; struct r8a66597_request *req; ep = &r8a66597->ep[0]; req = get_request_from_ep(ep); transfer_complete(ep, req, 0); } break; case CS_RDDS: case CS_WRDS: case CS_WRND: if (setup_packet(r8a66597, &ctrl)) { spin_unlock(&r8a66597->lock); if (r8a66597->driver->setup(&r8a66597->gadget, &ctrl) < 0) pipe_stall(r8a66597, 0); spin_lock(&r8a66597->lock); } break; case CS_RDSS: case CS_WRSS: control_end(r8a66597, 0); break; default: dev_err(r8a66597_to_dev(r8a66597), "ctrl_stage: unexpect ctsq(%x)\n", ctsq); break; } } static void sudmac_finish(struct r8a66597 *r8a66597, struct r8a66597_ep *ep) { u16 pipenum; struct r8a66597_request *req; u32 len; int i = 0; pipenum = ep->pipenum; pipe_change(r8a66597, pipenum); while (!(r8a66597_read(r8a66597, ep->fifoctr) & FRDY)) { udelay(1); if (unlikely(i++ >= 10000)) { /* timeout = 10 msec */ dev_err(r8a66597_to_dev(r8a66597), "%s: FRDY was not set (%d)\n", __func__, pipenum); return; } } r8a66597_bset(r8a66597, BCLR, ep->fifoctr); req = get_request_from_ep(ep); /* prepare parameters */ len = r8a66597_sudmac_read(r8a66597, CH0CBC); req->req.actual += len; /* clear */ r8a66597_sudmac_write(r8a66597, CH0STCLR, DSTSCLR); /* check transfer finish */ if ((!req->req.zero && (req->req.actual == req->req.length)) || (len % ep->ep.maxpacket)) { if (ep->dma->dir) { disable_irq_ready(r8a66597, pipenum); enable_irq_empty(r8a66597, pipenum); } else { /* Clear the interrupt flag for next transfer */ r8a66597_write(r8a66597, ~(1 << pipenum), BRDYSTS); transfer_complete(ep, req, 0); } } } static void r8a66597_sudmac_irq(struct r8a66597 *r8a66597) { u32 irqsts; struct r8a66597_ep *ep; u16 pipenum; irqsts = r8a66597_sudmac_read(r8a66597, DINTSTS); if (irqsts & CH0ENDS) { r8a66597_sudmac_write(r8a66597, CH0ENDC, DINTSTSCLR); pipenum = (r8a66597_read(r8a66597, D0FIFOSEL) & CURPIPE); ep = r8a66597->pipenum2ep[pipenum]; sudmac_finish(r8a66597, ep); } } static irqreturn_t r8a66597_irq(int irq, void *_r8a66597) { struct r8a66597 *r8a66597 = _r8a66597; u16 intsts0; u16 intenb0; u16 brdysts, nrdysts, bempsts; u16 brdyenb, nrdyenb, bempenb; u16 savepipe; u16 mask0; if (r8a66597_is_sudmac(r8a66597)) r8a66597_sudmac_irq(r8a66597); spin_lock(&r8a66597->lock); intsts0 = r8a66597_read(r8a66597, INTSTS0); intenb0 = r8a66597_read(r8a66597, INTENB0); savepipe = r8a66597_read(r8a66597, CFIFOSEL); mask0 = intsts0 & intenb0; if (mask0) { brdysts = r8a66597_read(r8a66597, BRDYSTS); nrdysts = r8a66597_read(r8a66597, NRDYSTS); bempsts = r8a66597_read(r8a66597, BEMPSTS); brdyenb = r8a66597_read(r8a66597, BRDYENB); nrdyenb = r8a66597_read(r8a66597, NRDYENB); bempenb = r8a66597_read(r8a66597, BEMPENB); if (mask0 & VBINT) { r8a66597_write(r8a66597, 0xffff & ~VBINT, INTSTS0); r8a66597_start_xclock(r8a66597); /* start vbus sampling */ r8a66597->old_vbus = r8a66597_read(r8a66597, INTSTS0) & VBSTS; r8a66597->scount = R8A66597_MAX_SAMPLING; mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50)); } if (intsts0 & DVSQ) irq_device_state(r8a66597); if ((intsts0 & BRDY) && (intenb0 & BRDYE) && (brdysts & brdyenb)) irq_pipe_ready(r8a66597, brdysts, brdyenb); if ((intsts0 & BEMP) && (intenb0 & BEMPE) && (bempsts & bempenb)) irq_pipe_empty(r8a66597, bempsts, bempenb); if (intsts0 & CTRT) irq_control_stage(r8a66597); } r8a66597_write(r8a66597, savepipe, CFIFOSEL); spin_unlock(&r8a66597->lock); return IRQ_HANDLED; } static void r8a66597_timer(unsigned long _r8a66597) { struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597; unsigned long flags; u16 tmp; spin_lock_irqsave(&r8a66597->lock, flags); tmp = r8a66597_read(r8a66597, SYSCFG0); if (r8a66597->scount > 0) { tmp = r8a66597_read(r8a66597, INTSTS0) & VBSTS; if (tmp == r8a66597->old_vbus) { r8a66597->scount--; if (r8a66597->scount == 0) { if (tmp == VBSTS) r8a66597_usb_connect(r8a66597); else r8a66597_usb_disconnect(r8a66597); } else { mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50)); } } else { r8a66597->scount = R8A66597_MAX_SAMPLING; r8a66597->old_vbus = tmp; mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50)); } } spin_unlock_irqrestore(&r8a66597->lock, flags); } /*-------------------------------------------------------------------------*/ static int r8a66597_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) { struct r8a66597_ep *ep; ep = container_of(_ep, struct r8a66597_ep, ep); return alloc_pipe_config(ep, desc); } static int r8a66597_disable(struct usb_ep *_ep) { struct r8a66597_ep *ep; struct r8a66597_request *req; unsigned long flags; ep = container_of(_ep, struct r8a66597_ep, ep); BUG_ON(!ep); while (!list_empty(&ep->queue)) { req = get_request_from_ep(ep); spin_lock_irqsave(&ep->r8a66597->lock, flags); transfer_complete(ep, req, -ECONNRESET); spin_unlock_irqrestore(&ep->r8a66597->lock, flags); } pipe_irq_disable(ep->r8a66597, ep->pipenum); return free_pipe_config(ep); } static struct usb_request *r8a66597_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) { struct r8a66597_request *req; req = kzalloc(sizeof(struct r8a66597_request), gfp_flags); if (!req) return NULL; INIT_LIST_HEAD(&req->queue); return &req->req; } static void r8a66597_free_request(struct usb_ep *_ep, struct usb_request *_req) { struct r8a66597_request *req; req = container_of(_req, struct r8a66597_request, req); kfree(req); } static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) { struct r8a66597_ep *ep; struct r8a66597_request *req; unsigned long flags; int request = 0; ep = container_of(_ep, struct r8a66597_ep, ep); req = container_of(_req, struct r8a66597_request, req); if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN) return -ESHUTDOWN; spin_lock_irqsave(&ep->r8a66597->lock, flags); if (list_empty(&ep->queue)) request = 1; list_add_tail(&req->queue, &ep->queue); req->req.actual = 0; req->req.status = -EINPROGRESS; if (ep->desc == NULL) /* control */ start_ep0(ep, req); else { if (request && !ep->busy) start_packet(ep, req); } spin_unlock_irqrestore(&ep->r8a66597->lock, flags); return 0; } static int r8a66597_dequeue(struct usb_ep *_ep, struct usb_request *_req) { struct r8a66597_ep *ep; struct r8a66597_request *req; unsigned long flags; ep = container_of(_ep, struct r8a66597_ep, ep); req = container_of(_req, struct r8a66597_request, req); spin_lock_irqsave(&ep->r8a66597->lock, flags); if (!list_empty(&ep->queue)) transfer_complete(ep, req, -ECONNRESET); spin_unlock_irqrestore(&ep->r8a66597->lock, flags); return 0; } static int r8a66597_set_halt(struct usb_ep *_ep, int value) { struct r8a66597_ep *ep; struct r8a66597_request *req; unsigned long flags; int ret = 0; ep = container_of(_ep, struct r8a66597_ep, ep); req = get_request_from_ep(ep); spin_lock_irqsave(&ep->r8a66597->lock, flags); if (!list_empty(&ep->queue)) { ret = -EAGAIN; goto out; } if (value) { ep->busy = 1; pipe_stall(ep->r8a66597, ep->pipenum); } else { ep->busy = 0; ep->wedge = 0; pipe_stop(ep->r8a66597, ep->pipenum); } out: spin_unlock_irqrestore(&ep->r8a66597->lock, flags); return ret; } static int r8a66597_set_wedge(struct usb_ep *_ep) { struct r8a66597_ep *ep; unsigned long flags; ep = container_of(_ep, struct r8a66597_ep, ep); if (!ep || !ep->desc) return -EINVAL; spin_lock_irqsave(&ep->r8a66597->lock, flags); ep->wedge = 1; spin_unlock_irqrestore(&ep->r8a66597->lock, flags); return usb_ep_set_halt(_ep); } static void r8a66597_fifo_flush(struct usb_ep *_ep) { struct r8a66597_ep *ep; unsigned long flags; ep = container_of(_ep, struct r8a66597_ep, ep); spin_lock_irqsave(&ep->r8a66597->lock, flags); if (list_empty(&ep->queue) && !ep->busy) { pipe_stop(ep->r8a66597, ep->pipenum); r8a66597_bclr(ep->r8a66597, BCLR, ep->fifoctr); r8a66597_write(ep->r8a66597, ACLRM, ep->pipectr); r8a66597_write(ep->r8a66597, 0, ep->pipectr); } spin_unlock_irqrestore(&ep->r8a66597->lock, flags); } static struct usb_ep_ops r8a66597_ep_ops = { .enable = r8a66597_enable, .disable = r8a66597_disable, .alloc_request = r8a66597_alloc_request, .free_request = r8a66597_free_request, .queue = r8a66597_queue, .dequeue = r8a66597_dequeue, .set_halt = r8a66597_set_halt, .set_wedge = r8a66597_set_wedge, .fifo_flush = r8a66597_fifo_flush, }; /*-------------------------------------------------------------------------*/ static int r8a66597_start(struct usb_gadget *gadget, struct usb_gadget_driver *driver) { struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget); if (!driver || driver->speed < USB_SPEED_HIGH || !driver->setup) return -EINVAL; if (!r8a66597) return -ENODEV; /* hook up the driver */ r8a66597->driver = driver; init_controller(r8a66597); r8a66597_bset(r8a66597, VBSE, INTENB0); if (r8a66597_read(r8a66597, INTSTS0) & VBSTS) { r8a66597_start_xclock(r8a66597); /* start vbus sampling */ r8a66597->old_vbus = r8a66597_read(r8a66597, INTSTS0) & VBSTS; r8a66597->scount = R8A66597_MAX_SAMPLING; mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50)); } return 0; } static int r8a66597_stop(struct usb_gadget *gadget, struct usb_gadget_driver *driver) { struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget); unsigned long flags; spin_lock_irqsave(&r8a66597->lock, flags); r8a66597_bclr(r8a66597, VBSE, INTENB0); disable_controller(r8a66597); spin_unlock_irqrestore(&r8a66597->lock, flags); r8a66597->driver = NULL; return 0; } /*-------------------------------------------------------------------------*/ static int r8a66597_get_frame(struct usb_gadget *_gadget) { struct r8a66597 *r8a66597 = gadget_to_r8a66597(_gadget); return r8a66597_read(r8a66597, FRMNUM) & 0x03FF; } static int r8a66597_pullup(struct usb_gadget *gadget, int is_on) { struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget); unsigned long flags; spin_lock_irqsave(&r8a66597->lock, flags); if (is_on) r8a66597_bset(r8a66597, DPRPU, SYSCFG0); else r8a66597_bclr(r8a66597, DPRPU, SYSCFG0); spin_unlock_irqrestore(&r8a66597->lock, flags); return 0; } static struct usb_gadget_ops r8a66597_gadget_ops = { .get_frame = r8a66597_get_frame, .udc_start = r8a66597_start, .udc_stop = r8a66597_stop, .pullup = r8a66597_pullup, }; static int __exit r8a66597_remove(struct platform_device *pdev) { struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev); usb_del_gadget_udc(&r8a66597->gadget); del_timer_sync(&r8a66597->timer); iounmap(r8a66597->reg); if (r8a66597->pdata->sudmac) iounmap(r8a66597->sudmac_reg); free_irq(platform_get_irq(pdev, 0), r8a66597); r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req); #ifdef CONFIG_HAVE_CLK if (r8a66597->pdata->on_chip) { clk_disable(r8a66597->clk); clk_put(r8a66597->clk); } #endif device_unregister(&r8a66597->gadget.dev); kfree(r8a66597); return 0; } static void nop_completion(struct usb_ep *ep, struct usb_request *r) { } static int __init r8a66597_sudmac_ioremap(struct r8a66597 *r8a66597, struct platform_device *pdev) { struct resource *res; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sudmac"); if (!res) { dev_err(&pdev->dev, "platform_get_resource error(sudmac).\n"); return -ENODEV; } r8a66597->sudmac_reg = ioremap(res->start, resource_size(res)); if (r8a66597->sudmac_reg == NULL) { dev_err(&pdev->dev, "ioremap error(sudmac).\n"); return -ENOMEM; } return 0; } static int __init r8a66597_probe(struct platform_device *pdev) { #ifdef CONFIG_HAVE_CLK char clk_name[8]; #endif struct resource *res, *ires; int irq; void __iomem *reg = NULL; struct r8a66597 *r8a66597 = NULL; int ret = 0; int i; unsigned long irq_trigger; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { ret = -ENODEV; dev_err(&pdev->dev, "platform_get_resource error.\n"); goto clean_up; } ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0); irq = ires->start; irq_trigger = ires->flags & IRQF_TRIGGER_MASK; if (irq < 0) { ret = -ENODEV; dev_err(&pdev->dev, "platform_get_irq error.\n"); goto clean_up; } reg = ioremap(res->start, resource_size(res)); if (reg == NULL) { ret = -ENOMEM; dev_err(&pdev->dev, "ioremap error.\n"); goto clean_up; } /* initialize ucd */ r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL); if (r8a66597 == NULL) { ret = -ENOMEM; dev_err(&pdev->dev, "kzalloc error\n"); goto clean_up; } spin_lock_init(&r8a66597->lock); dev_set_drvdata(&pdev->dev, r8a66597); r8a66597->pdata = pdev->dev.platform_data; r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW; r8a66597->gadget.ops = &r8a66597_gadget_ops; dev_set_name(&r8a66597->gadget.dev, "gadget"); r8a66597->gadget.is_dualspeed = 1; r8a66597->gadget.dev.parent = &pdev->dev; r8a66597->gadget.dev.dma_mask = pdev->dev.dma_mask; r8a66597->gadget.dev.release = pdev->dev.release; r8a66597->gadget.name = udc_name; ret = device_register(&r8a66597->gadget.dev); if (ret < 0) { dev_err(&pdev->dev, "device_register failed\n"); goto clean_up; } init_timer(&r8a66597->timer); r8a66597->timer.function = r8a66597_timer; r8a66597->timer.data = (unsigned long)r8a66597; r8a66597->reg = reg; #ifdef CONFIG_HAVE_CLK if (r8a66597->pdata->on_chip) { snprintf(clk_name, sizeof(clk_name), "usb%d", pdev->id); r8a66597->clk = clk_get(&pdev->dev, clk_name); if (IS_ERR(r8a66597->clk)) { dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name); ret = PTR_ERR(r8a66597->clk); goto clean_up_dev; } clk_enable(r8a66597->clk); } #endif if (r8a66597->pdata->sudmac) { ret = r8a66597_sudmac_ioremap(r8a66597, pdev); if (ret < 0) goto clean_up2; } disable_controller(r8a66597); /* make sure controller is disabled */ ret = request_irq(irq, r8a66597_irq, IRQF_SHARED, udc_name, r8a66597); if (ret < 0) { dev_err(&pdev->dev, "request_irq error (%d)\n", ret); goto clean_up2; } INIT_LIST_HEAD(&r8a66597->gadget.ep_list); r8a66597->gadget.ep0 = &r8a66597->ep[0].ep; INIT_LIST_HEAD(&r8a66597->gadget.ep0->ep_list); for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) { struct r8a66597_ep *ep = &r8a66597->ep[i]; if (i != 0) { INIT_LIST_HEAD(&r8a66597->ep[i].ep.ep_list); list_add_tail(&r8a66597->ep[i].ep.ep_list, &r8a66597->gadget.ep_list); } ep->r8a66597 = r8a66597; INIT_LIST_HEAD(&ep->queue); ep->ep.name = r8a66597_ep_name[i]; ep->ep.ops = &r8a66597_ep_ops; ep->ep.maxpacket = 512; } r8a66597->ep[0].ep.maxpacket = 64; r8a66597->ep[0].pipenum = 0; r8a66597->ep[0].fifoaddr = CFIFO; r8a66597->ep[0].fifosel = CFIFOSEL; r8a66597->ep[0].fifoctr = CFIFOCTR; r8a66597->ep[0].pipectr = get_pipectr_addr(0); r8a66597->pipenum2ep[0] = &r8a66597->ep[0]; r8a66597->epaddr2ep[0] = &r8a66597->ep[0]; r8a66597->ep0_req = r8a66597_alloc_request(&r8a66597->ep[0].ep, GFP_KERNEL); if (r8a66597->ep0_req == NULL) goto clean_up3; r8a66597->ep0_req->complete = nop_completion; ret = usb_add_gadget_udc(&pdev->dev, &r8a66597->gadget); if (ret) goto err_add_udc; dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION); return 0; err_add_udc: r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req); clean_up3: free_irq(irq, r8a66597); clean_up2: #ifdef CONFIG_HAVE_CLK if (r8a66597->pdata->on_chip) { clk_disable(r8a66597->clk); clk_put(r8a66597->clk); } clean_up_dev: #endif device_unregister(&r8a66597->gadget.dev); clean_up: if (r8a66597) { if (r8a66597->sudmac_reg) iounmap(r8a66597->sudmac_reg); if (r8a66597->ep0_req) r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req); kfree(r8a66597); } if (reg) iounmap(reg); return ret; } /*-------------------------------------------------------------------------*/ static struct platform_driver r8a66597_driver = { .remove = __exit_p(r8a66597_remove), .driver = { .name = (char *) udc_name, }, }; MODULE_ALIAS("platform:r8a66597_udc"); static int __init r8a66597_udc_init(void) { return platform_driver_probe(&r8a66597_driver, r8a66597_probe); } module_init(r8a66597_udc_init); static void __exit r8a66597_udc_cleanup(void) { platform_driver_unregister(&r8a66597_driver); } module_exit(r8a66597_udc_cleanup); MODULE_DESCRIPTION("R8A66597 USB gadget driver"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Yoshihiro Shimoda");