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Diffstat (limited to '')
| -rw-r--r-- | drivers/usb/gadget/udc/m66592-udc.c | 1697 |
1 files changed, 1697 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/m66592-udc.c b/drivers/usb/gadget/udc/m66592-udc.c new file mode 100644 index 000000000..d88871e71 --- /dev/null +++ b/drivers/usb/gadget/udc/m66592-udc.c @@ -0,0 +1,1697 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * M66592 UDC (USB gadget) + * + * Copyright (C) 2006-2007 Renesas Solutions Corp. + * + * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> + */ + +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/err.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> + +#include "m66592-udc.h" + +MODULE_DESCRIPTION("M66592 USB gadget driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Yoshihiro Shimoda"); +MODULE_ALIAS("platform:m66592_udc"); + +#define DRIVER_VERSION "21 July 2009" + +static const char udc_name[] = "m66592_udc"; +static const char *m66592_ep_name[] = { + "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7" +}; + +static void disable_controller(struct m66592 *m66592); +static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req); +static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req); +static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req, + gfp_t gfp_flags); + +static void transfer_complete(struct m66592_ep *ep, + struct m66592_request *req, int status); + +/*-------------------------------------------------------------------------*/ +static inline u16 get_usb_speed(struct m66592 *m66592) +{ + return (m66592_read(m66592, M66592_DVSTCTR) & M66592_RHST); +} + +static void enable_pipe_irq(struct m66592 *m66592, u16 pipenum, + unsigned long reg) +{ + u16 tmp; + + tmp = m66592_read(m66592, M66592_INTENB0); + m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE, + M66592_INTENB0); + m66592_bset(m66592, (1 << pipenum), reg); + m66592_write(m66592, tmp, M66592_INTENB0); +} + +static void disable_pipe_irq(struct m66592 *m66592, u16 pipenum, + unsigned long reg) +{ + u16 tmp; + + tmp = m66592_read(m66592, M66592_INTENB0); + m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE, + M66592_INTENB0); + m66592_bclr(m66592, (1 << pipenum), reg); + m66592_write(m66592, tmp, M66592_INTENB0); +} + +static void m66592_usb_connect(struct m66592 *m66592) +{ + m66592_bset(m66592, M66592_CTRE, M66592_INTENB0); + m66592_bset(m66592, M66592_WDST | M66592_RDST | M66592_CMPL, + M66592_INTENB0); + m66592_bset(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0); + + m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG); +} + +static void m66592_usb_disconnect(struct m66592 *m66592) +__releases(m66592->lock) +__acquires(m66592->lock) +{ + m66592_bclr(m66592, M66592_CTRE, M66592_INTENB0); + m66592_bclr(m66592, M66592_WDST | M66592_RDST | M66592_CMPL, + M66592_INTENB0); + m66592_bclr(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0); + m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG); + + m66592->gadget.speed = USB_SPEED_UNKNOWN; + spin_unlock(&m66592->lock); + m66592->driver->disconnect(&m66592->gadget); + spin_lock(&m66592->lock); + + disable_controller(m66592); + INIT_LIST_HEAD(&m66592->ep[0].queue); +} + +static inline u16 control_reg_get_pid(struct m66592 *m66592, u16 pipenum) +{ + u16 pid = 0; + unsigned long offset; + + if (pipenum == 0) + pid = m66592_read(m66592, M66592_DCPCTR) & M66592_PID; + else if (pipenum < M66592_MAX_NUM_PIPE) { + offset = get_pipectr_addr(pipenum); + pid = m66592_read(m66592, offset) & M66592_PID; + } else + pr_err("unexpect pipe num (%d)\n", pipenum); + + return pid; +} + +static inline void control_reg_set_pid(struct m66592 *m66592, u16 pipenum, + u16 pid) +{ + unsigned long offset; + + if (pipenum == 0) + m66592_mdfy(m66592, pid, M66592_PID, M66592_DCPCTR); + else if (pipenum < M66592_MAX_NUM_PIPE) { + offset = get_pipectr_addr(pipenum); + m66592_mdfy(m66592, pid, M66592_PID, offset); + } else + pr_err("unexpect pipe num (%d)\n", pipenum); +} + +static inline void pipe_start(struct m66592 *m66592, u16 pipenum) +{ + control_reg_set_pid(m66592, pipenum, M66592_PID_BUF); +} + +static inline void pipe_stop(struct m66592 *m66592, u16 pipenum) +{ + control_reg_set_pid(m66592, pipenum, M66592_PID_NAK); +} + +static inline void pipe_stall(struct m66592 *m66592, u16 pipenum) +{ + control_reg_set_pid(m66592, pipenum, M66592_PID_STALL); +} + +static inline u16 control_reg_get(struct m66592 *m66592, u16 pipenum) +{ + u16 ret = 0; + unsigned long offset; + + if (pipenum == 0) + ret = m66592_read(m66592, M66592_DCPCTR); + else if (pipenum < M66592_MAX_NUM_PIPE) { + offset = get_pipectr_addr(pipenum); + ret = m66592_read(m66592, offset); + } else + pr_err("unexpect pipe num (%d)\n", pipenum); + + return ret; +} + +static inline void control_reg_sqclr(struct m66592 *m66592, u16 pipenum) +{ + unsigned long offset; + + pipe_stop(m66592, pipenum); + + if (pipenum == 0) + m66592_bset(m66592, M66592_SQCLR, M66592_DCPCTR); + else if (pipenum < M66592_MAX_NUM_PIPE) { + offset = get_pipectr_addr(pipenum); + m66592_bset(m66592, M66592_SQCLR, offset); + } else + pr_err("unexpect pipe num(%d)\n", pipenum); +} + +static inline int get_buffer_size(struct m66592 *m66592, u16 pipenum) +{ + u16 tmp; + int size; + + if (pipenum == 0) { + tmp = m66592_read(m66592, M66592_DCPCFG); + if ((tmp & M66592_CNTMD) != 0) + size = 256; + else { + tmp = m66592_read(m66592, M66592_DCPMAXP); + size = tmp & M66592_MAXP; + } + } else { + m66592_write(m66592, pipenum, M66592_PIPESEL); + tmp = m66592_read(m66592, M66592_PIPECFG); + if ((tmp & M66592_CNTMD) != 0) { + tmp = m66592_read(m66592, M66592_PIPEBUF); + size = ((tmp >> 10) + 1) * 64; + } else { + tmp = m66592_read(m66592, M66592_PIPEMAXP); + size = tmp & M66592_MXPS; + } + } + + return size; +} + +static inline void pipe_change(struct m66592 *m66592, u16 pipenum) +{ + struct m66592_ep *ep = m66592->pipenum2ep[pipenum]; + unsigned short mbw; + + if (ep->use_dma) + return; + + m66592_mdfy(m66592, pipenum, M66592_CURPIPE, ep->fifosel); + + ndelay(450); + + if (m66592->pdata->on_chip) + mbw = M66592_MBW_32; + else + mbw = M66592_MBW_16; + + m66592_bset(m66592, mbw, ep->fifosel); +} + +static int pipe_buffer_setting(struct m66592 *m66592, + struct m66592_pipe_info *info) +{ + u16 bufnum = 0, buf_bsize = 0; + u16 pipecfg = 0; + + if (info->pipe == 0) + return -EINVAL; + + m66592_write(m66592, info->pipe, M66592_PIPESEL); + + if (info->dir_in) + pipecfg |= M66592_DIR; + pipecfg |= info->type; + pipecfg |= info->epnum; + switch (info->type) { + case M66592_INT: + bufnum = 4 + (info->pipe - M66592_BASE_PIPENUM_INT); + buf_bsize = 0; + break; + case M66592_BULK: + /* isochronous pipes may be used as bulk pipes */ + if (info->pipe >= M66592_BASE_PIPENUM_BULK) + bufnum = info->pipe - M66592_BASE_PIPENUM_BULK; + else + bufnum = info->pipe - M66592_BASE_PIPENUM_ISOC; + + bufnum = M66592_BASE_BUFNUM + (bufnum * 16); + buf_bsize = 7; + pipecfg |= M66592_DBLB; + if (!info->dir_in) + pipecfg |= M66592_SHTNAK; + break; + case M66592_ISO: + bufnum = M66592_BASE_BUFNUM + + (info->pipe - M66592_BASE_PIPENUM_ISOC) * 16; + buf_bsize = 7; + break; + } + + if (buf_bsize && ((bufnum + 16) >= M66592_MAX_BUFNUM)) { + pr_err("m66592 pipe memory is insufficient\n"); + return -ENOMEM; + } + + m66592_write(m66592, pipecfg, M66592_PIPECFG); + m66592_write(m66592, (buf_bsize << 10) | (bufnum), M66592_PIPEBUF); + m66592_write(m66592, info->maxpacket, M66592_PIPEMAXP); + if (info->interval) + info->interval--; + m66592_write(m66592, info->interval, M66592_PIPEPERI); + + return 0; +} + +static void pipe_buffer_release(struct m66592 *m66592, + struct m66592_pipe_info *info) +{ + if (info->pipe == 0) + return; + + if (is_bulk_pipe(info->pipe)) { + m66592->bulk--; + } else if (is_interrupt_pipe(info->pipe)) + m66592->interrupt--; + else if (is_isoc_pipe(info->pipe)) { + m66592->isochronous--; + if (info->type == M66592_BULK) + m66592->bulk--; + } else + pr_err("ep_release: unexpect pipenum (%d)\n", + info->pipe); +} + +static void pipe_initialize(struct m66592_ep *ep) +{ + struct m66592 *m66592 = ep->m66592; + unsigned short mbw; + + m66592_mdfy(m66592, 0, M66592_CURPIPE, ep->fifosel); + + m66592_write(m66592, M66592_ACLRM, ep->pipectr); + m66592_write(m66592, 0, ep->pipectr); + m66592_write(m66592, M66592_SQCLR, ep->pipectr); + if (ep->use_dma) { + m66592_mdfy(m66592, ep->pipenum, M66592_CURPIPE, ep->fifosel); + + ndelay(450); + + if (m66592->pdata->on_chip) + mbw = M66592_MBW_32; + else + mbw = M66592_MBW_16; + + m66592_bset(m66592, mbw, ep->fifosel); + } +} + +static void m66592_ep_setting(struct m66592 *m66592, struct m66592_ep *ep, + const struct usb_endpoint_descriptor *desc, + u16 pipenum, int dma) +{ + if ((pipenum != 0) && dma) { + if (m66592->num_dma == 0) { + m66592->num_dma++; + ep->use_dma = 1; + ep->fifoaddr = M66592_D0FIFO; + ep->fifosel = M66592_D0FIFOSEL; + ep->fifoctr = M66592_D0FIFOCTR; + ep->fifotrn = M66592_D0FIFOTRN; + } else if (!m66592->pdata->on_chip && m66592->num_dma == 1) { + m66592->num_dma++; + ep->use_dma = 1; + ep->fifoaddr = M66592_D1FIFO; + ep->fifosel = M66592_D1FIFOSEL; + ep->fifoctr = M66592_D1FIFOCTR; + ep->fifotrn = M66592_D1FIFOTRN; + } else { + ep->use_dma = 0; + ep->fifoaddr = M66592_CFIFO; + ep->fifosel = M66592_CFIFOSEL; + ep->fifoctr = M66592_CFIFOCTR; + ep->fifotrn = 0; + } + } else { + ep->use_dma = 0; + ep->fifoaddr = M66592_CFIFO; + ep->fifosel = M66592_CFIFOSEL; + ep->fifoctr = M66592_CFIFOCTR; + ep->fifotrn = 0; + } + + ep->pipectr = get_pipectr_addr(pipenum); + ep->pipenum = pipenum; + ep->ep.maxpacket = usb_endpoint_maxp(desc); + m66592->pipenum2ep[pipenum] = ep; + m66592->epaddr2ep[desc->bEndpointAddress&USB_ENDPOINT_NUMBER_MASK] = ep; + INIT_LIST_HEAD(&ep->queue); +} + +static void m66592_ep_release(struct m66592_ep *ep) +{ + struct m66592 *m66592 = ep->m66592; + u16 pipenum = ep->pipenum; + + if (pipenum == 0) + return; + + if (ep->use_dma) + m66592->num_dma--; + ep->pipenum = 0; + ep->busy = 0; + ep->use_dma = 0; +} + +static int alloc_pipe_config(struct m66592_ep *ep, + const struct usb_endpoint_descriptor *desc) +{ + struct m66592 *m66592 = ep->m66592; + struct m66592_pipe_info info; + int dma = 0; + int *counter; + int ret; + + ep->ep.desc = desc; + + BUG_ON(ep->pipenum); + + switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { + case USB_ENDPOINT_XFER_BULK: + if (m66592->bulk >= M66592_MAX_NUM_BULK) { + if (m66592->isochronous >= M66592_MAX_NUM_ISOC) { + pr_err("bulk pipe is insufficient\n"); + return -ENODEV; + } else { + info.pipe = M66592_BASE_PIPENUM_ISOC + + m66592->isochronous; + counter = &m66592->isochronous; + } + } else { + info.pipe = M66592_BASE_PIPENUM_BULK + m66592->bulk; + counter = &m66592->bulk; + } + info.type = M66592_BULK; + dma = 1; + break; + case USB_ENDPOINT_XFER_INT: + if (m66592->interrupt >= M66592_MAX_NUM_INT) { + pr_err("interrupt pipe is insufficient\n"); + return -ENODEV; + } + info.pipe = M66592_BASE_PIPENUM_INT + m66592->interrupt; + info.type = M66592_INT; + counter = &m66592->interrupt; + break; + case USB_ENDPOINT_XFER_ISOC: + if (m66592->isochronous >= M66592_MAX_NUM_ISOC) { + pr_err("isochronous pipe is insufficient\n"); + return -ENODEV; + } + info.pipe = M66592_BASE_PIPENUM_ISOC + m66592->isochronous; + info.type = M66592_ISO; + counter = &m66592->isochronous; + break; + default: + pr_err("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(m66592, &info); + if (ret < 0) { + pr_err("pipe_buffer_setting fail\n"); + return ret; + } + + (*counter)++; + if ((counter == &m66592->isochronous) && info.type == M66592_BULK) + m66592->bulk++; + + m66592_ep_setting(m66592, ep, desc, info.pipe, dma); + pipe_initialize(ep); + + return 0; +} + +static int free_pipe_config(struct m66592_ep *ep) +{ + struct m66592 *m66592 = ep->m66592; + struct m66592_pipe_info info; + + info.pipe = ep->pipenum; + info.type = ep->type; + pipe_buffer_release(m66592, &info); + m66592_ep_release(ep); + + return 0; +} + +/*-------------------------------------------------------------------------*/ +static void pipe_irq_enable(struct m66592 *m66592, u16 pipenum) +{ + enable_irq_ready(m66592, pipenum); + enable_irq_nrdy(m66592, pipenum); +} + +static void pipe_irq_disable(struct m66592 *m66592, u16 pipenum) +{ + disable_irq_ready(m66592, pipenum); + disable_irq_nrdy(m66592, pipenum); +} + +/* if complete is true, gadget driver complete function is not call */ +static void control_end(struct m66592 *m66592, unsigned ccpl) +{ + m66592->ep[0].internal_ccpl = ccpl; + pipe_start(m66592, 0); + m66592_bset(m66592, M66592_CCPL, M66592_DCPCTR); +} + +static void start_ep0_write(struct m66592_ep *ep, struct m66592_request *req) +{ + struct m66592 *m66592 = ep->m66592; + + pipe_change(m66592, ep->pipenum); + m66592_mdfy(m66592, M66592_ISEL | M66592_PIPE0, + (M66592_ISEL | M66592_CURPIPE), + M66592_CFIFOSEL); + m66592_write(m66592, M66592_BCLR, ep->fifoctr); + if (req->req.length == 0) { + m66592_bset(m66592, M66592_BVAL, ep->fifoctr); + pipe_start(m66592, 0); + transfer_complete(ep, req, 0); + } else { + m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS); + irq_ep0_write(ep, req); + } +} + +static void start_packet_write(struct m66592_ep *ep, struct m66592_request *req) +{ + struct m66592 *m66592 = ep->m66592; + u16 tmp; + + pipe_change(m66592, ep->pipenum); + disable_irq_empty(m66592, ep->pipenum); + pipe_start(m66592, ep->pipenum); + + tmp = m66592_read(m66592, ep->fifoctr); + if (unlikely((tmp & M66592_FRDY) == 0)) + pipe_irq_enable(m66592, ep->pipenum); + else + irq_packet_write(ep, req); +} + +static void start_packet_read(struct m66592_ep *ep, struct m66592_request *req) +{ + struct m66592 *m66592 = ep->m66592; + u16 pipenum = ep->pipenum; + + if (ep->pipenum == 0) { + m66592_mdfy(m66592, M66592_PIPE0, + (M66592_ISEL | M66592_CURPIPE), + M66592_CFIFOSEL); + m66592_write(m66592, M66592_BCLR, ep->fifoctr); + pipe_start(m66592, pipenum); + pipe_irq_enable(m66592, pipenum); + } else { + if (ep->use_dma) { + m66592_bset(m66592, M66592_TRCLR, ep->fifosel); + pipe_change(m66592, pipenum); + m66592_bset(m66592, M66592_TRENB, ep->fifosel); + m66592_write(m66592, + (req->req.length + ep->ep.maxpacket - 1) + / ep->ep.maxpacket, + ep->fifotrn); + } + pipe_start(m66592, pipenum); /* trigger once */ + pipe_irq_enable(m66592, pipenum); + } +} + +static void start_packet(struct m66592_ep *ep, struct m66592_request *req) +{ + if (ep->ep.desc->bEndpointAddress & USB_DIR_IN) + start_packet_write(ep, req); + else + start_packet_read(ep, req); +} + +static void start_ep0(struct m66592_ep *ep, struct m66592_request *req) +{ + u16 ctsq; + + ctsq = m66592_read(ep->m66592, M66592_INTSTS0) & M66592_CTSQ; + + switch (ctsq) { + case M66592_CS_RDDS: + start_ep0_write(ep, req); + break; + case M66592_CS_WRDS: + start_packet_read(ep, req); + break; + + case M66592_CS_WRND: + control_end(ep->m66592, 0); + break; + default: + pr_err("start_ep0: unexpect ctsq(%x)\n", ctsq); + break; + } +} + +static void init_controller(struct m66592 *m66592) +{ + unsigned int endian; + + if (m66592->pdata->on_chip) { + if (m66592->pdata->endian) + endian = 0; /* big endian */ + else + endian = M66592_LITTLE; /* little endian */ + + m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */ + m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG); + m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG); + m66592_bset(m66592, M66592_USBE, M66592_SYSCFG); + + /* This is a workaound for SH7722 2nd cut */ + m66592_bset(m66592, 0x8000, M66592_DVSTCTR); + m66592_bset(m66592, 0x1000, M66592_TESTMODE); + m66592_bclr(m66592, 0x8000, M66592_DVSTCTR); + + m66592_bset(m66592, M66592_INTL, M66592_INTENB1); + + m66592_write(m66592, 0, M66592_CFBCFG); + m66592_write(m66592, 0, M66592_D0FBCFG); + m66592_bset(m66592, endian, M66592_CFBCFG); + m66592_bset(m66592, endian, M66592_D0FBCFG); + } else { + unsigned int clock, vif, irq_sense; + + if (m66592->pdata->endian) + endian = M66592_BIGEND; /* big endian */ + else + endian = 0; /* little endian */ + + if (m66592->pdata->vif) + vif = M66592_LDRV; /* 3.3v */ + else + vif = 0; /* 1.5v */ + + switch (m66592->pdata->xtal) { + case M66592_PLATDATA_XTAL_12MHZ: + clock = M66592_XTAL12; + break; + case M66592_PLATDATA_XTAL_24MHZ: + clock = M66592_XTAL24; + break; + case M66592_PLATDATA_XTAL_48MHZ: + clock = M66592_XTAL48; + break; + default: + pr_warn("m66592-udc: xtal configuration error\n"); + clock = 0; + } + + switch (m66592->irq_trigger) { + case IRQF_TRIGGER_LOW: + irq_sense = M66592_INTL; + break; + case IRQF_TRIGGER_FALLING: + irq_sense = 0; + break; + default: + pr_warn("m66592-udc: irq trigger config error\n"); + irq_sense = 0; + } + + m66592_bset(m66592, + (vif & M66592_LDRV) | (endian & M66592_BIGEND), + M66592_PINCFG); + m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */ + m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL, + M66592_SYSCFG); + m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG); + m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG); + m66592_bset(m66592, M66592_USBE, M66592_SYSCFG); + + m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG); + + msleep(3); + + m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG); + + msleep(1); + + m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG); + + m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1); + m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR, + M66592_DMA0CFG); + } +} + +static void disable_controller(struct m66592 *m66592) +{ + m66592_bclr(m66592, M66592_UTST, M66592_TESTMODE); + if (!m66592->pdata->on_chip) { + m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG); + udelay(1); + m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG); + udelay(1); + m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG); + udelay(1); + m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG); + } +} + +static void m66592_start_xclock(struct m66592 *m66592) +{ + u16 tmp; + + if (!m66592->pdata->on_chip) { + tmp = m66592_read(m66592, M66592_SYSCFG); + if (!(tmp & M66592_XCKE)) + m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG); + } +} + +/*-------------------------------------------------------------------------*/ +static void transfer_complete(struct m66592_ep *ep, + struct m66592_request *req, int status) +__releases(m66592->lock) +__acquires(m66592->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->m66592->gadget.speed == USB_SPEED_UNKNOWN) + req->req.status = -ESHUTDOWN; + else + req->req.status = status; + + if (!list_empty(&ep->queue)) + restart = 1; + + spin_unlock(&ep->m66592->lock); + usb_gadget_giveback_request(&ep->ep, &req->req); + spin_lock(&ep->m66592->lock); + + if (restart) { + req = list_entry(ep->queue.next, struct m66592_request, queue); + if (ep->ep.desc) + start_packet(ep, req); + } +} + +static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req) +{ + int i; + u16 tmp; + unsigned bufsize; + size_t size; + void *buf; + u16 pipenum = ep->pipenum; + struct m66592 *m66592 = ep->m66592; + + pipe_change(m66592, pipenum); + m66592_bset(m66592, M66592_ISEL, ep->fifosel); + + i = 0; + do { + tmp = m66592_read(m66592, ep->fifoctr); + if (i++ > 100000) { + pr_err("pipe0 is busy. maybe cpu i/o bus " + "conflict. please power off this controller."); + return; + } + ndelay(1); + } while ((tmp & M66592_FRDY) == 0); + + /* prepare parameters */ + bufsize = get_buffer_size(m66592, 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) + m66592_write_fifo(m66592, ep, buf, size); + if ((size == 0) || ((size % ep->ep.maxpacket) != 0)) + m66592_bset(m66592, M66592_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(m66592, pipenum); + disable_irq_empty(m66592, pipenum); + } else { + disable_irq_ready(m66592, pipenum); + enable_irq_empty(m66592, pipenum); + } + pipe_start(m66592, pipenum); +} + +static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req) +{ + u16 tmp; + unsigned bufsize; + size_t size; + void *buf; + u16 pipenum = ep->pipenum; + struct m66592 *m66592 = ep->m66592; + + pipe_change(m66592, pipenum); + tmp = m66592_read(m66592, ep->fifoctr); + if (unlikely((tmp & M66592_FRDY) == 0)) { + pipe_stop(m66592, pipenum); + pipe_irq_disable(m66592, pipenum); + pr_err("write fifo not ready. pipnum=%d\n", pipenum); + return; + } + + /* prepare parameters */ + bufsize = get_buffer_size(m66592, pipenum); + buf = req->req.buf + req->req.actual; + size = min(bufsize, req->req.length - req->req.actual); + + /* write fifo */ + if (req->req.buf) { + m66592_write_fifo(m66592, ep, buf, size); + if ((size == 0) + || ((size % ep->ep.maxpacket) != 0) + || ((bufsize != ep->ep.maxpacket) + && (bufsize > size))) + m66592_bset(m66592, M66592_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(m66592, pipenum); + enable_irq_empty(m66592, pipenum); + } else { + disable_irq_empty(m66592, pipenum); + pipe_irq_enable(m66592, pipenum); + } +} + +static void irq_packet_read(struct m66592_ep *ep, struct m66592_request *req) +{ + u16 tmp; + int rcv_len, bufsize, req_len; + int size; + void *buf; + u16 pipenum = ep->pipenum; + struct m66592 *m66592 = ep->m66592; + int finish = 0; + + pipe_change(m66592, pipenum); + tmp = m66592_read(m66592, ep->fifoctr); + if (unlikely((tmp & M66592_FRDY) == 0)) { + req->req.status = -EPIPE; + pipe_stop(m66592, pipenum); + pipe_irq_disable(m66592, pipenum); + pr_err("read fifo not ready"); + return; + } + + /* prepare parameters */ + rcv_len = tmp & M66592_DTLN; + bufsize = get_buffer_size(m66592, 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(m66592, pipenum); + pipe_irq_disable(m66592, pipenum); + finish = 1; + } + + /* read fifo */ + if (req->req.buf) { + if (size == 0) + m66592_write(m66592, M66592_BCLR, ep->fifoctr); + else + m66592_read_fifo(m66592, ep->fifoaddr, buf, size); + } + + if ((ep->pipenum != 0) && finish) + transfer_complete(ep, req, 0); +} + +static void irq_pipe_ready(struct m66592 *m66592, u16 status, u16 enb) +{ + u16 check; + u16 pipenum; + struct m66592_ep *ep; + struct m66592_request *req; + + if ((status & M66592_BRDY0) && (enb & M66592_BRDY0)) { + m66592_write(m66592, ~M66592_BRDY0, M66592_BRDYSTS); + m66592_mdfy(m66592, M66592_PIPE0, M66592_CURPIPE, + M66592_CFIFOSEL); + + ep = &m66592->ep[0]; + req = list_entry(ep->queue.next, struct m66592_request, queue); + irq_packet_read(ep, req); + } else { + for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) { + check = 1 << pipenum; + if ((status & check) && (enb & check)) { + m66592_write(m66592, ~check, M66592_BRDYSTS); + ep = m66592->pipenum2ep[pipenum]; + req = list_entry(ep->queue.next, + struct m66592_request, queue); + if (ep->ep.desc->bEndpointAddress & USB_DIR_IN) + irq_packet_write(ep, req); + else + irq_packet_read(ep, req); + } + } + } +} + +static void irq_pipe_empty(struct m66592 *m66592, u16 status, u16 enb) +{ + u16 tmp; + u16 check; + u16 pipenum; + struct m66592_ep *ep; + struct m66592_request *req; + + if ((status & M66592_BEMP0) && (enb & M66592_BEMP0)) { + m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS); + + ep = &m66592->ep[0]; + req = list_entry(ep->queue.next, struct m66592_request, queue); + irq_ep0_write(ep, req); + } else { + for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) { + check = 1 << pipenum; + if ((status & check) && (enb & check)) { + m66592_write(m66592, ~check, M66592_BEMPSTS); + tmp = control_reg_get(m66592, pipenum); + if ((tmp & M66592_INBUFM) == 0) { + disable_irq_empty(m66592, pipenum); + pipe_irq_disable(m66592, pipenum); + pipe_stop(m66592, pipenum); + ep = m66592->pipenum2ep[pipenum]; + req = list_entry(ep->queue.next, + struct m66592_request, + queue); + if (!list_empty(&ep->queue)) + transfer_complete(ep, req, 0); + } + } + } + } +} + +static void get_status(struct m66592 *m66592, struct usb_ctrlrequest *ctrl) +__releases(m66592->lock) +__acquires(m66592->lock) +{ + struct m66592_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 = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK]; + pid = control_reg_get_pid(m66592, ep->pipenum); + if (pid == M66592_PID_STALL) + status = 1 << USB_ENDPOINT_HALT; + else + status = 0; + break; + default: + pipe_stall(m66592, 0); + return; /* exit */ + } + + m66592->ep0_data = cpu_to_le16(status); + m66592->ep0_req->buf = &m66592->ep0_data; + m66592->ep0_req->length = 2; + /* AV: what happens if we get called again before that gets through? */ + spin_unlock(&m66592->lock); + m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL); + spin_lock(&m66592->lock); +} + +static void clear_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl) +{ + switch (ctrl->bRequestType & USB_RECIP_MASK) { + case USB_RECIP_DEVICE: + control_end(m66592, 1); + break; + case USB_RECIP_INTERFACE: + control_end(m66592, 1); + break; + case USB_RECIP_ENDPOINT: { + struct m66592_ep *ep; + struct m66592_request *req; + u16 w_index = le16_to_cpu(ctrl->wIndex); + + ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK]; + pipe_stop(m66592, ep->pipenum); + control_reg_sqclr(m66592, ep->pipenum); + + control_end(m66592, 1); + + req = list_entry(ep->queue.next, + struct m66592_request, queue); + if (ep->busy) { + ep->busy = 0; + if (list_empty(&ep->queue)) + break; + start_packet(ep, req); + } else if (!list_empty(&ep->queue)) + pipe_start(m66592, ep->pipenum); + } + break; + default: + pipe_stall(m66592, 0); + break; + } +} + +static void set_feature(struct m66592 *m66592, 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(m66592, 1); + /* Wait for the completion of status stage */ + do { + tmp = m66592_read(m66592, M66592_INTSTS0) & + M66592_CTSQ; + udelay(1); + } while (tmp != M66592_CS_IDST && timeout-- > 0); + + if (tmp == M66592_CS_IDST) + m66592_bset(m66592, + le16_to_cpu(ctrl->wIndex >> 8), + M66592_TESTMODE); + break; + default: + pipe_stall(m66592, 0); + break; + } + break; + case USB_RECIP_INTERFACE: + control_end(m66592, 1); + break; + case USB_RECIP_ENDPOINT: { + struct m66592_ep *ep; + u16 w_index = le16_to_cpu(ctrl->wIndex); + + ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK]; + pipe_stall(m66592, ep->pipenum); + + control_end(m66592, 1); + } + break; + default: + pipe_stall(m66592, 0); + break; + } +} + +/* if return value is true, call class driver's setup() */ +static int setup_packet(struct m66592 *m66592, struct usb_ctrlrequest *ctrl) +{ + u16 *p = (u16 *)ctrl; + unsigned long offset = M66592_USBREQ; + int i, ret = 0; + + /* read fifo */ + m66592_write(m66592, ~M66592_VALID, M66592_INTSTS0); + + for (i = 0; i < 4; i++) + p[i] = m66592_read(m66592, offset + i*2); + + /* check request */ + if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { + switch (ctrl->bRequest) { + case USB_REQ_GET_STATUS: + get_status(m66592, ctrl); + break; + case USB_REQ_CLEAR_FEATURE: + clear_feature(m66592, ctrl); + break; + case USB_REQ_SET_FEATURE: + set_feature(m66592, ctrl); + break; + default: + ret = 1; + break; + } + } else + ret = 1; + return ret; +} + +static void m66592_update_usb_speed(struct m66592 *m66592) +{ + u16 speed = get_usb_speed(m66592); + + switch (speed) { + case M66592_HSMODE: + m66592->gadget.speed = USB_SPEED_HIGH; + break; + case M66592_FSMODE: + m66592->gadget.speed = USB_SPEED_FULL; + break; + default: + m66592->gadget.speed = USB_SPEED_UNKNOWN; + pr_err("USB speed unknown\n"); + } +} + +static void irq_device_state(struct m66592 *m66592) +{ + u16 dvsq; + + dvsq = m66592_read(m66592, M66592_INTSTS0) & M66592_DVSQ; + m66592_write(m66592, ~M66592_DVST, M66592_INTSTS0); + + if (dvsq == M66592_DS_DFLT) { /* bus reset */ + usb_gadget_udc_reset(&m66592->gadget, m66592->driver); + m66592_update_usb_speed(m66592); + } + if (m66592->old_dvsq == M66592_DS_CNFG && dvsq != M66592_DS_CNFG) + m66592_update_usb_speed(m66592); + if ((dvsq == M66592_DS_CNFG || dvsq == M66592_DS_ADDS) + && m66592->gadget.speed == USB_SPEED_UNKNOWN) + m66592_update_usb_speed(m66592); + + m66592->old_dvsq = dvsq; +} + +static void irq_control_stage(struct m66592 *m66592) +__releases(m66592->lock) +__acquires(m66592->lock) +{ + struct usb_ctrlrequest ctrl; + u16 ctsq; + + ctsq = m66592_read(m66592, M66592_INTSTS0) & M66592_CTSQ; + m66592_write(m66592, ~M66592_CTRT, M66592_INTSTS0); + + switch (ctsq) { + case M66592_CS_IDST: { + struct m66592_ep *ep; + struct m66592_request *req; + ep = &m66592->ep[0]; + req = list_entry(ep->queue.next, struct m66592_request, queue); + transfer_complete(ep, req, 0); + } + break; + + case M66592_CS_RDDS: + case M66592_CS_WRDS: + case M66592_CS_WRND: + if (setup_packet(m66592, &ctrl)) { + spin_unlock(&m66592->lock); + if (m66592->driver->setup(&m66592->gadget, &ctrl) < 0) + pipe_stall(m66592, 0); + spin_lock(&m66592->lock); + } + break; + case M66592_CS_RDSS: + case M66592_CS_WRSS: + control_end(m66592, 0); + break; + default: + pr_err("ctrl_stage: unexpect ctsq(%x)\n", ctsq); + break; + } +} + +static irqreturn_t m66592_irq(int irq, void *_m66592) +{ + struct m66592 *m66592 = _m66592; + u16 intsts0; + u16 intenb0; + u16 savepipe; + u16 mask0; + + spin_lock(&m66592->lock); + + intsts0 = m66592_read(m66592, M66592_INTSTS0); + intenb0 = m66592_read(m66592, M66592_INTENB0); + + if (m66592->pdata->on_chip && !intsts0 && !intenb0) { + /* + * When USB clock stops, it cannot read register. Even if a + * clock stops, the interrupt occurs. So this driver turn on + * a clock by this timing and do re-reading of register. + */ + m66592_start_xclock(m66592); + intsts0 = m66592_read(m66592, M66592_INTSTS0); + intenb0 = m66592_read(m66592, M66592_INTENB0); + } + + savepipe = m66592_read(m66592, M66592_CFIFOSEL); + + mask0 = intsts0 & intenb0; + if (mask0) { + u16 brdysts = m66592_read(m66592, M66592_BRDYSTS); + u16 bempsts = m66592_read(m66592, M66592_BEMPSTS); + u16 brdyenb = m66592_read(m66592, M66592_BRDYENB); + u16 bempenb = m66592_read(m66592, M66592_BEMPENB); + + if (mask0 & M66592_VBINT) { + m66592_write(m66592, 0xffff & ~M66592_VBINT, + M66592_INTSTS0); + m66592_start_xclock(m66592); + + /* start vbus sampling */ + m66592->old_vbus = m66592_read(m66592, M66592_INTSTS0) + & M66592_VBSTS; + m66592->scount = M66592_MAX_SAMPLING; + + mod_timer(&m66592->timer, + jiffies + msecs_to_jiffies(50)); + } + if (intsts0 & M66592_DVSQ) + irq_device_state(m66592); + + if ((intsts0 & M66592_BRDY) && (intenb0 & M66592_BRDYE) + && (brdysts & brdyenb)) { + irq_pipe_ready(m66592, brdysts, brdyenb); + } + if ((intsts0 & M66592_BEMP) && (intenb0 & M66592_BEMPE) + && (bempsts & bempenb)) { + irq_pipe_empty(m66592, bempsts, bempenb); + } + + if (intsts0 & M66592_CTRT) + irq_control_stage(m66592); + } + + m66592_write(m66592, savepipe, M66592_CFIFOSEL); + + spin_unlock(&m66592->lock); + return IRQ_HANDLED; +} + +static void m66592_timer(struct timer_list *t) +{ + struct m66592 *m66592 = from_timer(m66592, t, timer); + unsigned long flags; + u16 tmp; + + spin_lock_irqsave(&m66592->lock, flags); + tmp = m66592_read(m66592, M66592_SYSCFG); + if (!(tmp & M66592_RCKE)) { + m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG); + udelay(10); + m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG); + } + if (m66592->scount > 0) { + tmp = m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS; + if (tmp == m66592->old_vbus) { + m66592->scount--; + if (m66592->scount == 0) { + if (tmp == M66592_VBSTS) + m66592_usb_connect(m66592); + else + m66592_usb_disconnect(m66592); + } else { + mod_timer(&m66592->timer, + jiffies + msecs_to_jiffies(50)); + } + } else { + m66592->scount = M66592_MAX_SAMPLING; + m66592->old_vbus = tmp; + mod_timer(&m66592->timer, + jiffies + msecs_to_jiffies(50)); + } + } + spin_unlock_irqrestore(&m66592->lock, flags); +} + +/*-------------------------------------------------------------------------*/ +static int m66592_enable(struct usb_ep *_ep, + const struct usb_endpoint_descriptor *desc) +{ + struct m66592_ep *ep; + + ep = container_of(_ep, struct m66592_ep, ep); + return alloc_pipe_config(ep, desc); +} + +static int m66592_disable(struct usb_ep *_ep) +{ + struct m66592_ep *ep; + struct m66592_request *req; + unsigned long flags; + + ep = container_of(_ep, struct m66592_ep, ep); + BUG_ON(!ep); + + while (!list_empty(&ep->queue)) { + req = list_entry(ep->queue.next, struct m66592_request, queue); + spin_lock_irqsave(&ep->m66592->lock, flags); + transfer_complete(ep, req, -ECONNRESET); + spin_unlock_irqrestore(&ep->m66592->lock, flags); + } + + pipe_irq_disable(ep->m66592, ep->pipenum); + return free_pipe_config(ep); +} + +static struct usb_request *m66592_alloc_request(struct usb_ep *_ep, + gfp_t gfp_flags) +{ + struct m66592_request *req; + + req = kzalloc(sizeof(struct m66592_request), gfp_flags); + if (!req) + return NULL; + + INIT_LIST_HEAD(&req->queue); + + return &req->req; +} + +static void m66592_free_request(struct usb_ep *_ep, struct usb_request *_req) +{ + struct m66592_request *req; + + req = container_of(_req, struct m66592_request, req); + kfree(req); +} + +static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req, + gfp_t gfp_flags) +{ + struct m66592_ep *ep; + struct m66592_request *req; + unsigned long flags; + int request = 0; + + ep = container_of(_ep, struct m66592_ep, ep); + req = container_of(_req, struct m66592_request, req); + + if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN) + return -ESHUTDOWN; + + spin_lock_irqsave(&ep->m66592->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->ep.desc == NULL) /* control */ + start_ep0(ep, req); + else { + if (request && !ep->busy) + start_packet(ep, req); + } + + spin_unlock_irqrestore(&ep->m66592->lock, flags); + + return 0; +} + +static int m66592_dequeue(struct usb_ep *_ep, struct usb_request *_req) +{ + struct m66592_ep *ep; + struct m66592_request *req; + unsigned long flags; + + ep = container_of(_ep, struct m66592_ep, ep); + req = container_of(_req, struct m66592_request, req); + + spin_lock_irqsave(&ep->m66592->lock, flags); + if (!list_empty(&ep->queue)) + transfer_complete(ep, req, -ECONNRESET); + spin_unlock_irqrestore(&ep->m66592->lock, flags); + + return 0; +} + +static int m66592_set_halt(struct usb_ep *_ep, int value) +{ + struct m66592_ep *ep = container_of(_ep, struct m66592_ep, ep); + unsigned long flags; + int ret = 0; + + spin_lock_irqsave(&ep->m66592->lock, flags); + if (!list_empty(&ep->queue)) { + ret = -EAGAIN; + } else if (value) { + ep->busy = 1; + pipe_stall(ep->m66592, ep->pipenum); + } else { + ep->busy = 0; + pipe_stop(ep->m66592, ep->pipenum); + } + spin_unlock_irqrestore(&ep->m66592->lock, flags); + return ret; +} + +static void m66592_fifo_flush(struct usb_ep *_ep) +{ + struct m66592_ep *ep; + unsigned long flags; + + ep = container_of(_ep, struct m66592_ep, ep); + spin_lock_irqsave(&ep->m66592->lock, flags); + if (list_empty(&ep->queue) && !ep->busy) { + pipe_stop(ep->m66592, ep->pipenum); + m66592_bclr(ep->m66592, M66592_BCLR, ep->fifoctr); + } + spin_unlock_irqrestore(&ep->m66592->lock, flags); +} + +static const struct usb_ep_ops m66592_ep_ops = { + .enable = m66592_enable, + .disable = m66592_disable, + + .alloc_request = m66592_alloc_request, + .free_request = m66592_free_request, + + .queue = m66592_queue, + .dequeue = m66592_dequeue, + + .set_halt = m66592_set_halt, + .fifo_flush = m66592_fifo_flush, +}; + +/*-------------------------------------------------------------------------*/ +static int m66592_udc_start(struct usb_gadget *g, + struct usb_gadget_driver *driver) +{ + struct m66592 *m66592 = to_m66592(g); + + /* hook up the driver */ + m66592->driver = driver; + + m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0); + if (m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS) { + m66592_start_xclock(m66592); + /* start vbus sampling */ + m66592->old_vbus = m66592_read(m66592, + M66592_INTSTS0) & M66592_VBSTS; + m66592->scount = M66592_MAX_SAMPLING; + mod_timer(&m66592->timer, jiffies + msecs_to_jiffies(50)); + } + + return 0; +} + +static int m66592_udc_stop(struct usb_gadget *g) +{ + struct m66592 *m66592 = to_m66592(g); + + m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0); + + init_controller(m66592); + disable_controller(m66592); + + m66592->driver = NULL; + + return 0; +} + +/*-------------------------------------------------------------------------*/ +static int m66592_get_frame(struct usb_gadget *_gadget) +{ + struct m66592 *m66592 = gadget_to_m66592(_gadget); + return m66592_read(m66592, M66592_FRMNUM) & 0x03FF; +} + +static int m66592_pullup(struct usb_gadget *gadget, int is_on) +{ + struct m66592 *m66592 = gadget_to_m66592(gadget); + unsigned long flags; + + spin_lock_irqsave(&m66592->lock, flags); + if (is_on) + m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG); + else + m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG); + spin_unlock_irqrestore(&m66592->lock, flags); + + return 0; +} + +static const struct usb_gadget_ops m66592_gadget_ops = { + .get_frame = m66592_get_frame, + .udc_start = m66592_udc_start, + .udc_stop = m66592_udc_stop, + .pullup = m66592_pullup, +}; + +static int m66592_remove(struct platform_device *pdev) +{ + struct m66592 *m66592 = platform_get_drvdata(pdev); + + usb_del_gadget_udc(&m66592->gadget); + + del_timer_sync(&m66592->timer); + iounmap(m66592->reg); + free_irq(platform_get_irq(pdev, 0), m66592); + m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req); + if (m66592->pdata->on_chip) { + clk_disable(m66592->clk); + clk_put(m66592->clk); + } + kfree(m66592); + return 0; +} + +static void nop_completion(struct usb_ep *ep, struct usb_request *r) +{ +} + +static int m66592_probe(struct platform_device *pdev) +{ + struct resource *res, *ires; + void __iomem *reg = NULL; + struct m66592 *m66592 = NULL; + char clk_name[8]; + int ret = 0; + int i; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + ret = -ENODEV; + pr_err("platform_get_resource error.\n"); + goto clean_up; + } + + ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!ires) { + ret = -ENODEV; + dev_err(&pdev->dev, + "platform_get_resource IORESOURCE_IRQ error.\n"); + goto clean_up; + } + + reg = ioremap(res->start, resource_size(res)); + if (reg == NULL) { + ret = -ENOMEM; + pr_err("ioremap error.\n"); + goto clean_up; + } + + if (dev_get_platdata(&pdev->dev) == NULL) { + dev_err(&pdev->dev, "no platform data\n"); + ret = -ENODEV; + goto clean_up; + } + + /* initialize ucd */ + m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL); + if (m66592 == NULL) { + ret = -ENOMEM; + goto clean_up; + } + + m66592->pdata = dev_get_platdata(&pdev->dev); + m66592->irq_trigger = ires->flags & IRQF_TRIGGER_MASK; + + spin_lock_init(&m66592->lock); + platform_set_drvdata(pdev, m66592); + + m66592->gadget.ops = &m66592_gadget_ops; + m66592->gadget.max_speed = USB_SPEED_HIGH; + m66592->gadget.name = udc_name; + + timer_setup(&m66592->timer, m66592_timer, 0); + m66592->reg = reg; + + ret = request_irq(ires->start, m66592_irq, IRQF_SHARED, + udc_name, m66592); + if (ret < 0) { + pr_err("request_irq error (%d)\n", ret); + goto clean_up; + } + + if (m66592->pdata->on_chip) { + snprintf(clk_name, sizeof(clk_name), "usbf%d", pdev->id); + m66592->clk = clk_get(&pdev->dev, clk_name); + if (IS_ERR(m66592->clk)) { + dev_err(&pdev->dev, "cannot get clock \"%s\"\n", + clk_name); + ret = PTR_ERR(m66592->clk); + goto clean_up2; + } + clk_enable(m66592->clk); + } + + INIT_LIST_HEAD(&m66592->gadget.ep_list); + m66592->gadget.ep0 = &m66592->ep[0].ep; + INIT_LIST_HEAD(&m66592->gadget.ep0->ep_list); + for (i = 0; i < M66592_MAX_NUM_PIPE; i++) { + struct m66592_ep *ep = &m66592->ep[i]; + + if (i != 0) { + INIT_LIST_HEAD(&m66592->ep[i].ep.ep_list); + list_add_tail(&m66592->ep[i].ep.ep_list, + &m66592->gadget.ep_list); + } + ep->m66592 = m66592; + INIT_LIST_HEAD(&ep->queue); + ep->ep.name = m66592_ep_name[i]; + ep->ep.ops = &m66592_ep_ops; + usb_ep_set_maxpacket_limit(&ep->ep, 512); + + if (i == 0) { + ep->ep.caps.type_control = true; + } else { + ep->ep.caps.type_iso = true; + ep->ep.caps.type_bulk = true; + ep->ep.caps.type_int = true; + } + + ep->ep.caps.dir_in = true; + ep->ep.caps.dir_out = true; + } + usb_ep_set_maxpacket_limit(&m66592->ep[0].ep, 64); + m66592->ep[0].pipenum = 0; + m66592->ep[0].fifoaddr = M66592_CFIFO; + m66592->ep[0].fifosel = M66592_CFIFOSEL; + m66592->ep[0].fifoctr = M66592_CFIFOCTR; + m66592->ep[0].fifotrn = 0; + m66592->ep[0].pipectr = get_pipectr_addr(0); + m66592->pipenum2ep[0] = &m66592->ep[0]; + m66592->epaddr2ep[0] = &m66592->ep[0]; + + m66592->ep0_req = m66592_alloc_request(&m66592->ep[0].ep, GFP_KERNEL); + if (m66592->ep0_req == NULL) { + ret = -ENOMEM; + goto clean_up3; + } + m66592->ep0_req->complete = nop_completion; + + init_controller(m66592); + + ret = usb_add_gadget_udc(&pdev->dev, &m66592->gadget); + if (ret) + goto err_add_udc; + + dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION); + return 0; + +err_add_udc: + m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req); + m66592->ep0_req = NULL; +clean_up3: + if (m66592->pdata->on_chip) { + clk_disable(m66592->clk); + clk_put(m66592->clk); + } +clean_up2: + free_irq(ires->start, m66592); +clean_up: + if (m66592) { + if (m66592->ep0_req) + m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req); + kfree(m66592); + } + if (reg) + iounmap(reg); + + return ret; +} + +/*-------------------------------------------------------------------------*/ +static struct platform_driver m66592_driver = { + .remove = m66592_remove, + .driver = { + .name = udc_name, + }, +}; + +module_platform_driver_probe(m66592_driver, m66592_probe); |