| /* |
| * R8A66597 UDC (USB gadget) |
| * |
| * Copyright (C) 2006-2009 Renesas Solutions Corp. |
| * |
| * Author : Yoshihiro Shimoda <shimoda.yoshihiro@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. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/interrupt.h> |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <linux/io.h> |
| #include <linux/platform_device.h> |
| #include <linux/clk.h> |
| #include <linux/err.h> |
| #include <linux/slab.h> |
| |
| #include <linux/usb/ch9.h> |
| #include <linux/usb/gadget.h> |
| |
| #include "r8a66597-udc.h" |
| |
| #define DRIVER_VERSION "2009-08-18" |
| |
| 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 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_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 |
| printk(KERN_ERR "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 |
| printk(KERN_ERR "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 |
| printk(KERN_ERR "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 |
| printk(KERN_ERR "unexpect pipe num(%d)\n", 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 inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum) |
| { |
| struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum]; |
| |
| if (ep->use_dma) |
| return; |
| |
| r8a66597_mdfy(r8a66597, pipenum, CURPIPE, ep->fifosel); |
| |
| ndelay(450); |
| |
| r8a66597_bset(r8a66597, mbw_value(r8a66597), 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(KERN_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 |
| printk(KERN_ERR "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->fifotrn = 0; |
| |
| ep->pipectr = get_pipectr_addr(pipenum); |
| ep->pipenum = pipenum; |
| ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize); |
| 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) { |
| printk(KERN_ERR "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) { |
| printk(KERN_ERR "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) { |
| printk(KERN_ERR "isochronous pipe is insufficient\n"); |
| return -ENODEV; |
| } |
| info.pipe = R8A66597_BASE_PIPENUM_ISOC + r8a66597->isochronous; |
| info.type = R8A66597_ISO; |
| counter = &r8a66597->isochronous; |
| break; |
| default: |
| printk(KERN_ERR "unexpect xfer type\n"); |
| return -EINVAL; |
| } |
| ep->type = info.type; |
| |
| info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; |
| info.maxpacket = le16_to_cpu(desc->wMaxPacketSize); |
| 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) { |
| printk(KERN_ERR "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 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); |
| |
| tmp = r8a66597_read(r8a66597, ep->fifoctr); |
| if (unlikely((tmp & FRDY) == 0)) |
| pipe_irq_enable(r8a66597, ep->pipenum); |
| else |
| irq_packet_write(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 { |
| if (ep->use_dma) { |
| r8a66597_bset(r8a66597, TRCLR, ep->fifosel); |
| pipe_change(r8a66597, pipenum); |
| r8a66597_bset(r8a66597, TRENB, ep->fifosel); |
| r8a66597_write(r8a66597, |
| (req->req.length + ep->ep.maxpacket - 1) |
| / ep->ep.maxpacket, |
| ep->fifotrn); |
| } |
| pipe_start(r8a66597, pipenum); /* trigger once */ |
| pipe_irq_enable(r8a66597, pipenum); |
| } |
| } |
| |
| 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: |
| printk(KERN_ERR "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) { |
| r8a66597_bset(r8a66597, 0x04, 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); |
| |
| /* 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, 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; |
| |
| 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) { |
| printk(KERN_ERR "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->fifoaddr, 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); |
| printk(KERN_ERR "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->fifoaddr, 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); |
| printk(KERN_ERR "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) |
| { |
| |
| 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; |
| 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; |
| printk(KERN_ERR "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 */ |
| r8a66597->driver->disconnect(&r8a66597->gadget); |
| 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: |
| printk(KERN_ERR "ctrl_stage: unexpect ctsq(%x)\n", ctsq); |
| break; |
| } |
| } |
| |
| 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; |
| |
| 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); |
| } |
| 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 struct r8a66597 *the_controller; |
| |
| int usb_gadget_register_driver(struct usb_gadget_driver *driver) |
| { |
| struct r8a66597 *r8a66597 = the_controller; |
| int retval; |
| |
| if (!driver |
| || driver->speed != USB_SPEED_HIGH |
| || !driver->bind |
| || !driver->setup) |
| return -EINVAL; |
| if (!r8a66597) |
| return -ENODEV; |
| if (r8a66597->driver) |
| return -EBUSY; |
| |
| /* hook up the driver */ |
| driver->driver.bus = NULL; |
| r8a66597->driver = driver; |
| r8a66597->gadget.dev.driver = &driver->driver; |
| |
| retval = device_add(&r8a66597->gadget.dev); |
| if (retval) { |
| printk(KERN_ERR "device_add error (%d)\n", retval); |
| goto error; |
| } |
| |
| retval = driver->bind(&r8a66597->gadget); |
| if (retval) { |
| printk(KERN_ERR "bind to driver error (%d)\n", retval); |
| device_del(&r8a66597->gadget.dev); |
| goto error; |
| } |
| |
| 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; |
| |
| error: |
| r8a66597->driver = NULL; |
| r8a66597->gadget.dev.driver = NULL; |
| |
| return retval; |
| } |
| EXPORT_SYMBOL(usb_gadget_register_driver); |
| |
| int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) |
| { |
| struct r8a66597 *r8a66597 = the_controller; |
| unsigned long flags; |
| |
| if (driver != r8a66597->driver || !driver->unbind) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&r8a66597->lock, flags); |
| if (r8a66597->gadget.speed != USB_SPEED_UNKNOWN) |
| r8a66597_usb_disconnect(r8a66597); |
| spin_unlock_irqrestore(&r8a66597->lock, flags); |
| |
| r8a66597_bclr(r8a66597, VBSE, INTENB0); |
| |
| driver->unbind(&r8a66597->gadget); |
| |
| init_controller(r8a66597); |
| disable_controller(r8a66597); |
| |
| device_del(&r8a66597->gadget.dev); |
| r8a66597->driver = NULL; |
| return 0; |
| } |
| EXPORT_SYMBOL(usb_gadget_unregister_driver); |
| |
| /*-------------------------------------------------------------------------*/ |
| static int r8a66597_get_frame(struct usb_gadget *_gadget) |
| { |
| struct r8a66597 *r8a66597 = gadget_to_r8a66597(_gadget); |
| return r8a66597_read(r8a66597, FRMNUM) & 0x03FF; |
| } |
| |
| static struct usb_gadget_ops r8a66597_gadget_ops = { |
| .get_frame = r8a66597_get_frame, |
| }; |
| |
| static int __exit r8a66597_remove(struct platform_device *pdev) |
| { |
| struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev); |
| |
| del_timer_sync(&r8a66597->timer); |
| iounmap((void *)r8a66597->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 |
| kfree(r8a66597); |
| return 0; |
| } |
| |
| static void nop_completion(struct usb_ep *ep, struct usb_request *r) |
| { |
| } |
| |
| 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; |
| printk(KERN_ERR "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; |
| printk(KERN_ERR "platform_get_irq error.\n"); |
| goto clean_up; |
| } |
| |
| reg = ioremap(res->start, resource_size(res)); |
| if (reg == NULL) { |
| ret = -ENOMEM; |
| printk(KERN_ERR "ioremap error.\n"); |
| goto clean_up; |
| } |
| |
| /* initialize ucd */ |
| r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL); |
| if (r8a66597 == NULL) { |
| printk(KERN_ERR "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; |
| device_initialize(&r8a66597->gadget.dev); |
| 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; |
| |
| init_timer(&r8a66597->timer); |
| r8a66597->timer.function = r8a66597_timer; |
| r8a66597->timer.data = (unsigned long)r8a66597; |
| r8a66597->reg = (unsigned long)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; |
| } |
| clk_enable(r8a66597->clk); |
| } |
| #endif |
| |
| disable_controller(r8a66597); /* make sure controller is disabled */ |
| |
| ret = request_irq(irq, r8a66597_irq, IRQF_DISABLED | IRQF_SHARED, |
| udc_name, r8a66597); |
| if (ret < 0) { |
| printk(KERN_ERR "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].fifotrn = 0; |
| r8a66597->ep[0].pipectr = get_pipectr_addr(0); |
| r8a66597->pipenum2ep[0] = &r8a66597->ep[0]; |
| r8a66597->epaddr2ep[0] = &r8a66597->ep[0]; |
| |
| the_controller = r8a66597; |
| |
| 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; |
| |
| init_controller(r8a66597); |
| |
| dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION); |
| return 0; |
| |
| 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); |
| } |
| #endif |
| clean_up: |
| if (r8a66597) { |
| 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, |
| }, |
| }; |
| |
| 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"); |
| |
