/* * linux/drivers/usb/gadget/s3c2410_udc.c * * Samsung S3C24xx series on-chip full speed USB device controllers * * Copyright (C) 2004-2007 Herbert P�tzl - Arnaud Patard * Additional cleanups by Ben Dooks <ben-linux@fluff.org> * * 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; either version 2 of the License, or * (at your option) any later version. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/ioport.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/smp_lock.h> #include <linux/errno.h> #include <linux/init.h> #include <linux/timer.h> #include <linux/list.h> #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/version.h> #include <linux/clk.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include <linux/usb.h> #include <linux/usb/gadget.h> #include <asm/byteorder.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/system.h> #include <asm/unaligned.h> #include <asm/arch/irqs.h> #include <asm/arch/hardware.h> #include <asm/arch/regs-gpio.h> #include <asm/plat-s3c24xx/regs-udc.h> #include <asm/plat-s3c24xx/udc.h> #include <asm/mach-types.h> #include "s3c2410_udc.h" #define DRIVER_DESC "S3C2410 USB Device Controller Gadget" #define DRIVER_VERSION "29 Apr 2007" #define DRIVER_AUTHOR "Herbert P�tzl <herbert@13thfloor.at>, " \ "Arnaud Patard <arnaud.patard@rtp-net.org>" static const char gadget_name[] = "s3c2410_udc"; static const char driver_desc[] = DRIVER_DESC; static struct s3c2410_udc *the_controller; static struct clk *udc_clock; static struct clk *usb_bus_clock; static void __iomem *base_addr; static u64 rsrc_start; static u64 rsrc_len; static struct dentry *s3c2410_udc_debugfs_root; static inline u32 udc_read(u32 reg) { return readb(base_addr + reg); } static inline void udc_write(u32 value, u32 reg) { writeb(value, base_addr + reg); } static inline void udc_writeb(void __iomem *base, u32 value, u32 reg) { writeb(value, base + reg); } static struct s3c2410_udc_mach_info *udc_info; /*************************** DEBUG FUNCTION ***************************/ #define DEBUG_NORMAL 1 #define DEBUG_VERBOSE 2 #ifdef CONFIG_USB_S3C2410_DEBUG #define USB_S3C2410_DEBUG_LEVEL 0 static uint32_t s3c2410_ticks = 0; static int dprintk(int level, const char *fmt, ...) { static char printk_buf[1024]; static long prevticks; static int invocation; va_list args; int len; if (level > USB_S3C2410_DEBUG_LEVEL) return 0; if (s3c2410_ticks != prevticks) { prevticks = s3c2410_ticks; invocation = 0; } len = scnprintf(printk_buf, sizeof(printk_buf), "%1lu.%02d USB: ", prevticks, invocation++); va_start(args, fmt); len = vscnprintf(printk_buf+len, sizeof(printk_buf)-len, fmt, args); va_end(args); return printk(KERN_DEBUG "%s", printk_buf); } #else static int dprintk(int level, const char *fmt, ...) { return 0; } #endif static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p) { u32 addr_reg,pwr_reg,ep_int_reg,usb_int_reg; u32 ep_int_en_reg, usb_int_en_reg, ep0_csr; u32 ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2; u32 ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2; addr_reg = udc_read(S3C2410_UDC_FUNC_ADDR_REG); pwr_reg = udc_read(S3C2410_UDC_PWR_REG); ep_int_reg = udc_read(S3C2410_UDC_EP_INT_REG); usb_int_reg = udc_read(S3C2410_UDC_USB_INT_REG); ep_int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG); usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG); udc_write(0, S3C2410_UDC_INDEX_REG); ep0_csr = udc_read(S3C2410_UDC_IN_CSR1_REG); udc_write(1, S3C2410_UDC_INDEX_REG); ep1_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG); ep1_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG); ep1_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG); ep1_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG); udc_write(2, S3C2410_UDC_INDEX_REG); ep2_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG); ep2_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG); ep2_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG); ep2_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG); seq_printf(m, "FUNC_ADDR_REG : 0x%04X\n" "PWR_REG : 0x%04X\n" "EP_INT_REG : 0x%04X\n" "USB_INT_REG : 0x%04X\n" "EP_INT_EN_REG : 0x%04X\n" "USB_INT_EN_REG : 0x%04X\n" "EP0_CSR : 0x%04X\n" "EP1_I_CSR1 : 0x%04X\n" "EP1_I_CSR2 : 0x%04X\n" "EP1_O_CSR1 : 0x%04X\n" "EP1_O_CSR2 : 0x%04X\n" "EP2_I_CSR1 : 0x%04X\n" "EP2_I_CSR2 : 0x%04X\n" "EP2_O_CSR1 : 0x%04X\n" "EP2_O_CSR2 : 0x%04X\n", addr_reg,pwr_reg,ep_int_reg,usb_int_reg, ep_int_en_reg, usb_int_en_reg, ep0_csr, ep1_i_csr1,ep1_i_csr2,ep1_o_csr1,ep1_o_csr2, ep2_i_csr1,ep2_i_csr2,ep2_o_csr1,ep2_o_csr2 ); return 0; } static int s3c2410_udc_debugfs_fops_open(struct inode *inode, struct file *file) { return single_open(file, s3c2410_udc_debugfs_seq_show, NULL); } static const struct file_operations s3c2410_udc_debugfs_fops = { .open = s3c2410_udc_debugfs_fops_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, .owner = THIS_MODULE, }; /* io macros */ static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base) { udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY, S3C2410_UDC_EP0_CSR_REG); } static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base) { udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG); } static inline void s3c2410_udc_clear_ep0_se(void __iomem *base) { udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG); } static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base) { udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG); } static inline void s3c2410_udc_set_ep0_de(void __iomem *base) { udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG); } inline void s3c2410_udc_set_ep0_ss(void __iomem *b) { udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG); } static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base) { udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); udc_writeb(base,(S3C2410_UDC_EP0_CSR_SOPKTRDY | S3C2410_UDC_EP0_CSR_DE), S3C2410_UDC_EP0_CSR_REG); } static inline void s3c2410_udc_set_ep0_sse_out(void __iomem *base) { udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY | S3C2410_UDC_EP0_CSR_SSE), S3C2410_UDC_EP0_CSR_REG); } static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base) { udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY | S3C2410_UDC_EP0_CSR_DE), S3C2410_UDC_EP0_CSR_REG); } /*------------------------- I/O ----------------------------------*/ /* * s3c2410_udc_done */ static void s3c2410_udc_done(struct s3c2410_ep *ep, struct s3c2410_request *req, int status) { unsigned halted = ep->halted; list_del_init(&req->queue); if (likely (req->req.status == -EINPROGRESS)) req->req.status = status; else status = req->req.status; ep->halted = 1; req->req.complete(&ep->ep, &req->req); ep->halted = halted; } static void s3c2410_udc_nuke(struct s3c2410_udc *udc, struct s3c2410_ep *ep, int status) { /* Sanity check */ if (&ep->queue == NULL) return; while (!list_empty (&ep->queue)) { struct s3c2410_request *req; req = list_entry (ep->queue.next, struct s3c2410_request, queue); s3c2410_udc_done(ep, req, status); } } static inline void s3c2410_udc_clear_ep_state(struct s3c2410_udc *dev) { unsigned i; /* hardware SET_{CONFIGURATION,INTERFACE} automagic resets endpoint * fifos, and pending transactions mustn't be continued in any case. */ for (i = 1; i < S3C2410_ENDPOINTS; i++) s3c2410_udc_nuke(dev, &dev->ep[i], -ECONNABORTED); } static inline int s3c2410_udc_fifo_count_out(void) { int tmp; tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8; tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG); return tmp; } /* * s3c2410_udc_write_packet */ static inline int s3c2410_udc_write_packet(int fifo, struct s3c2410_request *req, unsigned max) { unsigned len = min(req->req.length - req->req.actual, max); u8 *buf = req->req.buf + req->req.actual; prefetch(buf); dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__, req->req.actual, req->req.length, len, req->req.actual + len); req->req.actual += len; udelay(5); writesb(base_addr + fifo, buf, len); return len; } /* * s3c2410_udc_write_fifo * * return: 0 = still running, 1 = completed, negative = errno */ static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep, struct s3c2410_request *req) { unsigned count; int is_last; u32 idx; int fifo_reg; u32 ep_csr; idx = ep->bEndpointAddress & 0x7F; switch (idx) { default: idx = 0; case 0: fifo_reg = S3C2410_UDC_EP0_FIFO_REG; break; case 1: fifo_reg = S3C2410_UDC_EP1_FIFO_REG; break; case 2: fifo_reg = S3C2410_UDC_EP2_FIFO_REG; break; case 3: fifo_reg = S3C2410_UDC_EP3_FIFO_REG; break; case 4: fifo_reg = S3C2410_UDC_EP4_FIFO_REG; break; } count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket); /* last packet is often short (sometimes a zlp) */ if (count != ep->ep.maxpacket) is_last = 1; else if (req->req.length != req->req.actual || req->req.zero) is_last = 0; else is_last = 2; /* Only ep0 debug messages are interesting */ if (idx == 0) dprintk(DEBUG_NORMAL, "Written ep%d %d.%d of %d b [last %d,z %d]\n", idx, count, req->req.actual, req->req.length, is_last, req->req.zero); if (is_last) { /* The order is important. It prevents sending 2 packets * at the same time */ if (idx == 0) { /* Reset signal => no need to say 'data sent' */ if (! (udc_read(S3C2410_UDC_USB_INT_REG) & S3C2410_UDC_USBINT_RESET)) s3c2410_udc_set_ep0_de_in(base_addr); ep->dev->ep0state=EP0_IDLE; } else { udc_write(idx, S3C2410_UDC_INDEX_REG); ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG); udc_write(idx, S3C2410_UDC_INDEX_REG); udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY, S3C2410_UDC_IN_CSR1_REG); } s3c2410_udc_done(ep, req, 0); is_last = 1; } else { if (idx == 0) { /* Reset signal => no need to say 'data sent' */ if (! (udc_read(S3C2410_UDC_USB_INT_REG) & S3C2410_UDC_USBINT_RESET)) s3c2410_udc_set_ep0_ipr(base_addr); } else { udc_write(idx, S3C2410_UDC_INDEX_REG); ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG); udc_write(idx, S3C2410_UDC_INDEX_REG); udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY, S3C2410_UDC_IN_CSR1_REG); } } return is_last; } static inline int s3c2410_udc_read_packet(int fifo, u8 *buf, struct s3c2410_request *req, unsigned avail) { unsigned len; len = min(req->req.length - req->req.actual, avail); req->req.actual += len; readsb(fifo + base_addr, buf, len); return len; } /* * return: 0 = still running, 1 = queue empty, negative = errno */ static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep, struct s3c2410_request *req) { u8 *buf; u32 ep_csr; unsigned bufferspace; int is_last=1; unsigned avail; int fifo_count = 0; u32 idx; int fifo_reg; idx = ep->bEndpointAddress & 0x7F; switch (idx) { default: idx = 0; case 0: fifo_reg = S3C2410_UDC_EP0_FIFO_REG; break; case 1: fifo_reg = S3C2410_UDC_EP1_FIFO_REG; break; case 2: fifo_reg = S3C2410_UDC_EP2_FIFO_REG; break; case 3: fifo_reg = S3C2410_UDC_EP3_FIFO_REG; break; case 4: fifo_reg = S3C2410_UDC_EP4_FIFO_REG; break; } if (!req->req.length) return 1; buf = req->req.buf + req->req.actual; bufferspace = req->req.length - req->req.actual; if (!bufferspace) { dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__); return -1; } udc_write(idx, S3C2410_UDC_INDEX_REG); fifo_count = s3c2410_udc_fifo_count_out(); dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count); if (fifo_count > ep->ep.maxpacket) avail = ep->ep.maxpacket; else avail = fifo_count; fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail); /* checking this with ep0 is not accurate as we already * read a control request **/ if (idx != 0 && fifo_count < ep->ep.maxpacket) { is_last = 1; /* overflowed this request? flush extra data */ if (fifo_count != avail) req->req.status = -EOVERFLOW; } else { is_last = (req->req.length <= req->req.actual) ? 1 : 0; } udc_write(idx, S3C2410_UDC_INDEX_REG); fifo_count = s3c2410_udc_fifo_count_out(); /* Only ep0 debug messages are interesting */ if (idx == 0) dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n", __func__, fifo_count,is_last); if (is_last) { if (idx == 0) { s3c2410_udc_set_ep0_de_out(base_addr); ep->dev->ep0state = EP0_IDLE; } else { udc_write(idx, S3C2410_UDC_INDEX_REG); ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG); udc_write(idx, S3C2410_UDC_INDEX_REG); udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY, S3C2410_UDC_OUT_CSR1_REG); } s3c2410_udc_done(ep, req, 0); } else { if (idx == 0) { s3c2410_udc_clear_ep0_opr(base_addr); } else { udc_write(idx, S3C2410_UDC_INDEX_REG); ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG); udc_write(idx, S3C2410_UDC_INDEX_REG); udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY, S3C2410_UDC_OUT_CSR1_REG); } } return is_last; } static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq) { unsigned char *outbuf = (unsigned char*)crq; int bytes_read = 0; udc_write(0, S3C2410_UDC_INDEX_REG); bytes_read = s3c2410_udc_fifo_count_out(); dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read); if (bytes_read > sizeof(struct usb_ctrlrequest)) bytes_read = sizeof(struct usb_ctrlrequest); readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read); dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__, bytes_read, crq->bRequest, crq->bRequestType, crq->wValue, crq->wIndex, crq->wLength); return bytes_read; } static int s3c2410_udc_get_status(struct s3c2410_udc *dev, struct usb_ctrlrequest *crq) { u16 status = 0; u8 ep_num = crq->wIndex & 0x7F; u8 is_in = crq->wIndex & USB_DIR_IN; switch (crq->bRequestType & USB_RECIP_MASK) { case USB_RECIP_INTERFACE: break; case USB_RECIP_DEVICE: status = dev->devstatus; break; case USB_RECIP_ENDPOINT: if (ep_num > 4 || crq->wLength > 2) return 1; if (ep_num == 0) { udc_write(0, S3C2410_UDC_INDEX_REG); status = udc_read(S3C2410_UDC_IN_CSR1_REG); status = status & S3C2410_UDC_EP0_CSR_SENDSTL; } else { udc_write(ep_num, S3C2410_UDC_INDEX_REG); if (is_in) { status = udc_read(S3C2410_UDC_IN_CSR1_REG); status = status & S3C2410_UDC_ICSR1_SENDSTL; } else { status = udc_read(S3C2410_UDC_OUT_CSR1_REG); status = status & S3C2410_UDC_OCSR1_SENDSTL; } } status = status ? 1 : 0; break; default: return 1; } /* Seems to be needed to get it working. ouch :( */ udelay(5); udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG); udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG); s3c2410_udc_set_ep0_de_in(base_addr); return 0; } /*------------------------- usb state machine -------------------------------*/ static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value); static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev, struct s3c2410_ep *ep, struct usb_ctrlrequest *crq, u32 ep0csr) { int len, ret, tmp; /* start control request? */ if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY)) return; s3c2410_udc_nuke(dev, ep, -EPROTO); len = s3c2410_udc_read_fifo_crq(crq); if (len != sizeof(*crq)) { dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR" " wanted %d bytes got %d. Stalling out...\n", sizeof(*crq), len); s3c2410_udc_set_ep0_ss(base_addr); return; } dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n", crq->bRequest, crq->bRequestType, crq->wLength); /* cope with automagic for some standard requests. */ dev->req_std = (crq->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD; dev->req_config = 0; dev->req_pending = 1; switch (crq->bRequest) { case USB_REQ_SET_CONFIGURATION: dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ... \n"); if (crq->bRequestType == USB_RECIP_DEVICE) { dev->req_config = 1; s3c2410_udc_set_ep0_de_out(base_addr); } break; case USB_REQ_SET_INTERFACE: dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ... \n"); if (crq->bRequestType == USB_RECIP_INTERFACE) { dev->req_config = 1; s3c2410_udc_set_ep0_de_out(base_addr); } break; case USB_REQ_SET_ADDRESS: dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ... \n"); if (crq->bRequestType == USB_RECIP_DEVICE) { tmp = crq->wValue & 0x7F; dev->address = tmp; udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE), S3C2410_UDC_FUNC_ADDR_REG); s3c2410_udc_set_ep0_de_out(base_addr); return; } break; case USB_REQ_GET_STATUS: dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ... \n"); s3c2410_udc_clear_ep0_opr(base_addr); if (dev->req_std) { if (!s3c2410_udc_get_status(dev, crq)) { return; } } break; case USB_REQ_CLEAR_FEATURE: s3c2410_udc_clear_ep0_opr(base_addr); if (crq->bRequestType != USB_RECIP_ENDPOINT) break; if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0) break; s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0); s3c2410_udc_set_ep0_de_out(base_addr); return; case USB_REQ_SET_FEATURE: s3c2410_udc_clear_ep0_opr(base_addr); if (crq->bRequestType != USB_RECIP_ENDPOINT) break; if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0) break; s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1); s3c2410_udc_set_ep0_de_out(base_addr); return; default: s3c2410_udc_clear_ep0_opr(base_addr); break; } if (crq->bRequestType & USB_DIR_IN) dev->ep0state = EP0_IN_DATA_PHASE; else dev->ep0state = EP0_OUT_DATA_PHASE; ret = dev->driver->setup(&dev->gadget, crq); if (ret < 0) { if (dev->req_config) { dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n", crq->bRequest, ret); return; } if (ret == -EOPNOTSUPP) dprintk(DEBUG_NORMAL, "Operation not supported\n"); else dprintk(DEBUG_NORMAL, "dev->driver->setup failed. (%d)\n", ret); udelay(5); s3c2410_udc_set_ep0_ss(base_addr); s3c2410_udc_set_ep0_de_out(base_addr); dev->ep0state = EP0_IDLE; /* deferred i/o == no response yet */ } else if (dev->req_pending) { dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n"); dev->req_pending=0; } dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]); } static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev) { u32 ep0csr; struct s3c2410_ep *ep = &dev->ep[0]; struct s3c2410_request *req; struct usb_ctrlrequest crq; if (list_empty(&ep->queue)) req = NULL; else req = list_entry(ep->queue.next, struct s3c2410_request, queue); /* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to * S3C2410_UDC_EP0_CSR_REG when index is zero */ udc_write(0, S3C2410_UDC_INDEX_REG); ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG); dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n", ep0csr, ep0states[dev->ep0state]); /* clear stall status */ if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) { s3c2410_udc_nuke(dev, ep, -EPIPE); dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n"); s3c2410_udc_clear_ep0_sst(base_addr); dev->ep0state = EP0_IDLE; return; } /* clear setup end */ if (ep0csr & S3C2410_UDC_EP0_CSR_SE) { dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n"); s3c2410_udc_nuke(dev, ep, 0); s3c2410_udc_clear_ep0_se(base_addr); dev->ep0state = EP0_IDLE; } switch (dev->ep0state) { case EP0_IDLE: s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr); break; case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */ dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n"); if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req) { s3c2410_udc_write_fifo(ep, req); } break; case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */ dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n"); if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req ) { s3c2410_udc_read_fifo(ep,req); } break; case EP0_END_XFER: dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n"); dev->ep0state = EP0_IDLE; break; case EP0_STALL: dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n"); dev->ep0state = EP0_IDLE; break; } } /* * handle_ep - Manage I/O endpoints */ static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep) { struct s3c2410_request *req; int is_in = ep->bEndpointAddress & USB_DIR_IN; u32 ep_csr1; u32 idx; if (likely (!list_empty(&ep->queue))) req = list_entry(ep->queue.next, struct s3c2410_request, queue); else req = NULL; idx = ep->bEndpointAddress & 0x7F; if (is_in) { udc_write(idx, S3C2410_UDC_INDEX_REG); ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG); dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n", idx, ep_csr1, req ? 1 : 0); if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) { dprintk(DEBUG_VERBOSE, "st\n"); udc_write(idx, S3C2410_UDC_INDEX_REG); udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL, S3C2410_UDC_IN_CSR1_REG); return; } if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req) { s3c2410_udc_write_fifo(ep,req); } } else { udc_write(idx, S3C2410_UDC_INDEX_REG); ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG); dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1); if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) { udc_write(idx, S3C2410_UDC_INDEX_REG); udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL, S3C2410_UDC_OUT_CSR1_REG); return; } if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req) { s3c2410_udc_read_fifo(ep,req); } } } #include <asm/arch/regs-irq.h> /* * s3c2410_udc_irq - interrupt handler */ static irqreturn_t s3c2410_udc_irq(int irq, void *_dev) { struct s3c2410_udc *dev = _dev; int usb_status; int usbd_status; int pwr_reg; int ep0csr; int i; u32 idx; unsigned long flags; spin_lock_irqsave(&dev->lock, flags); /* Driver connected ? */ if (!dev->driver) { /* Clear interrupts */ udc_write(udc_read(S3C2410_UDC_USB_INT_REG), S3C2410_UDC_USB_INT_REG); udc_write(udc_read(S3C2410_UDC_EP_INT_REG), S3C2410_UDC_EP_INT_REG); } /* Save index */ idx = udc_read(S3C2410_UDC_INDEX_REG); /* Read status registers */ usb_status = udc_read(S3C2410_UDC_USB_INT_REG); usbd_status = udc_read(S3C2410_UDC_EP_INT_REG); pwr_reg = udc_read(S3C2410_UDC_PWR_REG); udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG); ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG); dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n", usb_status, usbd_status, pwr_reg, ep0csr); /* * Now, handle interrupts. There's two types : * - Reset, Resume, Suspend coming -> usb_int_reg * - EP -> ep_int_reg */ /* RESET */ if (usb_status & S3C2410_UDC_USBINT_RESET) { /* two kind of reset : * - reset start -> pwr reg = 8 * - reset end -> pwr reg = 0 **/ dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n", ep0csr, pwr_reg); dev->gadget.speed = USB_SPEED_UNKNOWN; udc_write(0x00, S3C2410_UDC_INDEX_REG); udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3, S3C2410_UDC_MAXP_REG); dev->address = 0; dev->ep0state = EP0_IDLE; dev->gadget.speed = USB_SPEED_FULL; /* clear interrupt */ udc_write(S3C2410_UDC_USBINT_RESET, S3C2410_UDC_USB_INT_REG); udc_write(idx, S3C2410_UDC_INDEX_REG); spin_unlock_irqrestore(&dev->lock, flags); return IRQ_HANDLED; } /* RESUME */ if (usb_status & S3C2410_UDC_USBINT_RESUME) { dprintk(DEBUG_NORMAL, "USB resume\n"); /* clear interrupt */ udc_write(S3C2410_UDC_USBINT_RESUME, S3C2410_UDC_USB_INT_REG); if (dev->gadget.speed != USB_SPEED_UNKNOWN && dev->driver && dev->driver->resume) dev->driver->resume(&dev->gadget); } /* SUSPEND */ if (usb_status & S3C2410_UDC_USBINT_SUSPEND) { dprintk(DEBUG_NORMAL, "USB suspend\n"); /* clear interrupt */ udc_write(S3C2410_UDC_USBINT_SUSPEND, S3C2410_UDC_USB_INT_REG); if (dev->gadget.speed != USB_SPEED_UNKNOWN && dev->driver && dev->driver->suspend) dev->driver->suspend(&dev->gadget); dev->ep0state = EP0_IDLE; } /* EP */ /* control traffic */ /* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready * generate an interrupt */ if (usbd_status & S3C2410_UDC_INT_EP0) { dprintk(DEBUG_VERBOSE, "USB ep0 irq\n"); /* Clear the interrupt bit by setting it to 1 */ udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG); s3c2410_udc_handle_ep0(dev); } /* endpoint data transfers */ for (i = 1; i < S3C2410_ENDPOINTS; i++) { u32 tmp = 1 << i; if (usbd_status & tmp) { dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i); /* Clear the interrupt bit by setting it to 1 */ udc_write(tmp, S3C2410_UDC_EP_INT_REG); s3c2410_udc_handle_ep(&dev->ep[i]); } } dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", irq); /* Restore old index */ udc_write(idx, S3C2410_UDC_INDEX_REG); spin_unlock_irqrestore(&dev->lock, flags); return IRQ_HANDLED; } /*------------------------- s3c2410_ep_ops ----------------------------------*/ static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep) { return container_of(ep, struct s3c2410_ep, ep); } static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget) { return container_of(gadget, struct s3c2410_udc, gadget); } static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req) { return container_of(req, struct s3c2410_request, req); } /* * s3c2410_udc_ep_enable */ static int s3c2410_udc_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) { struct s3c2410_udc *dev; struct s3c2410_ep *ep; u32 max, tmp; unsigned long flags; u32 csr1,csr2; u32 int_en_reg; ep = to_s3c2410_ep(_ep); if (!_ep || !desc || ep->desc || _ep->name == ep0name || desc->bDescriptorType != USB_DT_ENDPOINT) return -EINVAL; dev = ep->dev; if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) return -ESHUTDOWN; max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff; local_irq_save (flags); _ep->maxpacket = max & 0x7ff; ep->desc = desc; ep->halted = 0; ep->bEndpointAddress = desc->bEndpointAddress; /* set max packet */ udc_write(ep->num, S3C2410_UDC_INDEX_REG); udc_write(max >> 3, S3C2410_UDC_MAXP_REG); /* set type, direction, address; reset fifo counters */ if (desc->bEndpointAddress & USB_DIR_IN) { csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT; csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN; udc_write(ep->num, S3C2410_UDC_INDEX_REG); udc_write(csr1, S3C2410_UDC_IN_CSR1_REG); udc_write(ep->num, S3C2410_UDC_INDEX_REG); udc_write(csr2, S3C2410_UDC_IN_CSR2_REG); } else { /* don't flush in fifo or it will cause endpoint interrupt */ csr1 = S3C2410_UDC_ICSR1_CLRDT; csr2 = S3C2410_UDC_ICSR2_DMAIEN; udc_write(ep->num, S3C2410_UDC_INDEX_REG); udc_write(csr1, S3C2410_UDC_IN_CSR1_REG); udc_write(ep->num, S3C2410_UDC_INDEX_REG); udc_write(csr2, S3C2410_UDC_IN_CSR2_REG); csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT; csr2 = S3C2410_UDC_OCSR2_DMAIEN; udc_write(ep->num, S3C2410_UDC_INDEX_REG); udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG); udc_write(ep->num, S3C2410_UDC_INDEX_REG); udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG); } /* enable irqs */ int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG); udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG); /* print some debug message */ tmp = desc->bEndpointAddress; dprintk (DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n", _ep->name,ep->num, tmp, desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max); local_irq_restore (flags); s3c2410_udc_set_halt(_ep, 0); return 0; } /* * s3c2410_udc_ep_disable */ static int s3c2410_udc_ep_disable(struct usb_ep *_ep) { struct s3c2410_ep *ep = to_s3c2410_ep(_ep); unsigned long flags; u32 int_en_reg; if (!_ep || !ep->desc) { dprintk(DEBUG_NORMAL, "%s not enabled\n", _ep ? ep->ep.name : NULL); return -EINVAL; } local_irq_save(flags); dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name); ep->desc = NULL; ep->halted = 1; s3c2410_udc_nuke (ep->dev, ep, -ESHUTDOWN); /* disable irqs */ int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG); udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG); local_irq_restore(flags); dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name); return 0; } /* * s3c2410_udc_alloc_request */ static struct usb_request * s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags) { struct s3c2410_request *req; dprintk(DEBUG_VERBOSE,"%s(%p,%d)\n", __func__, _ep, mem_flags); if (!_ep) return NULL; req = kzalloc (sizeof(struct s3c2410_request), mem_flags); if (!req) return NULL; INIT_LIST_HEAD (&req->queue); return &req->req; } /* * s3c2410_udc_free_request */ static void s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req) { struct s3c2410_ep *ep = to_s3c2410_ep(_ep); struct s3c2410_request *req = to_s3c2410_req(_req); dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req); if (!ep || !_req || (!ep->desc && _ep->name != ep0name)) return; WARN_ON (!list_empty (&req->queue)); kfree(req); } /* * s3c2410_udc_queue */ static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) { struct s3c2410_request *req = to_s3c2410_req(_req); struct s3c2410_ep *ep = to_s3c2410_ep(_ep); struct s3c2410_udc *dev; u32 ep_csr = 0; int fifo_count = 0; unsigned long flags; if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) { dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__); return -EINVAL; } dev = ep->dev; if (unlikely (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { return -ESHUTDOWN; } local_irq_save (flags); if (unlikely(!_req || !_req->complete || !_req->buf || !list_empty(&req->queue))) { if (!_req) dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__); else { dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n", __func__, !_req->complete,!_req->buf, !list_empty(&req->queue)); } local_irq_restore(flags); return -EINVAL; } _req->status = -EINPROGRESS; _req->actual = 0; dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n", __func__, ep->bEndpointAddress, _req->length); if (ep->bEndpointAddress) { udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG); ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN) ? S3C2410_UDC_IN_CSR1_REG : S3C2410_UDC_OUT_CSR1_REG); fifo_count = s3c2410_udc_fifo_count_out(); } else { udc_write(0, S3C2410_UDC_INDEX_REG); ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG); fifo_count = s3c2410_udc_fifo_count_out(); } /* kickstart this i/o queue? */ if (list_empty(&ep->queue) && !ep->halted) { if (ep->bEndpointAddress == 0 /* ep0 */) { switch (dev->ep0state) { case EP0_IN_DATA_PHASE: if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY) && s3c2410_udc_write_fifo(ep, req)) { dev->ep0state = EP0_IDLE; req = NULL; } break; case EP0_OUT_DATA_PHASE: if ((!_req->length) || ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY) && s3c2410_udc_read_fifo(ep, req))) { dev->ep0state = EP0_IDLE; req = NULL; } break; default: local_irq_restore(flags); return -EL2HLT; } } else if ((ep->bEndpointAddress & USB_DIR_IN) != 0 && (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY)) && s3c2410_udc_write_fifo(ep, req)) { req = NULL; } else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY) && fifo_count && s3c2410_udc_read_fifo(ep, req)) { req = NULL; } } /* pio or dma irq handler advances the queue. */ if (likely (req != 0)) list_add_tail(&req->queue, &ep->queue); local_irq_restore(flags); dprintk(DEBUG_VERBOSE, "%s ok\n", __func__); return 0; } /* * s3c2410_udc_dequeue */ static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req) { struct s3c2410_ep *ep = to_s3c2410_ep(_ep); struct s3c2410_udc *udc; int retval = -EINVAL; unsigned long flags; struct s3c2410_request *req = NULL; dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req); if (!the_controller->driver) return -ESHUTDOWN; if (!_ep || !_req) return retval; udc = to_s3c2410_udc(ep->gadget); local_irq_save (flags); list_for_each_entry (req, &ep->queue, queue) { if (&req->req == _req) { list_del_init (&req->queue); _req->status = -ECONNRESET; retval = 0; break; } } if (retval == 0) { dprintk(DEBUG_VERBOSE, "dequeued req %p from %s, len %d buf %p\n", req, _ep->name, _req->length, _req->buf); s3c2410_udc_done(ep, req, -ECONNRESET); } local_irq_restore (flags); return retval; } /* * s3c2410_udc_set_halt */ static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value) { struct s3c2410_ep *ep = to_s3c2410_ep(_ep); u32 ep_csr = 0; unsigned long flags; u32 idx; if (unlikely (!_ep || (!ep->desc && ep->ep.name != ep0name))) { dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__); return -EINVAL; } local_irq_save (flags); idx = ep->bEndpointAddress & 0x7F; if (idx == 0) { s3c2410_udc_set_ep0_ss(base_addr); s3c2410_udc_set_ep0_de_out(base_addr); } else { udc_write(idx, S3C2410_UDC_INDEX_REG); ep_csr = udc_read((ep->bEndpointAddress &USB_DIR_IN) ? S3C2410_UDC_IN_CSR1_REG : S3C2410_UDC_OUT_CSR1_REG); if ((ep->bEndpointAddress & USB_DIR_IN) != 0) { if (value) udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL, S3C2410_UDC_IN_CSR1_REG); else { ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL; udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG); ep_csr |= S3C2410_UDC_ICSR1_CLRDT; udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG); } } else { if (value) udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL, S3C2410_UDC_OUT_CSR1_REG); else { ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL; udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG); ep_csr |= S3C2410_UDC_OCSR1_CLRDT; udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG); } } } ep->halted = value ? 1 : 0; local_irq_restore (flags); return 0; } static const struct usb_ep_ops s3c2410_ep_ops = { .enable = s3c2410_udc_ep_enable, .disable = s3c2410_udc_ep_disable, .alloc_request = s3c2410_udc_alloc_request, .free_request = s3c2410_udc_free_request, .queue = s3c2410_udc_queue, .dequeue = s3c2410_udc_dequeue, .set_halt = s3c2410_udc_set_halt, }; /*------------------------- usb_gadget_ops ----------------------------------*/ /* * s3c2410_udc_get_frame */ static int s3c2410_udc_get_frame(struct usb_gadget *_gadget) { int tmp; dprintk(DEBUG_VERBOSE, "%s()\n", __func__); tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8; tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG); return tmp; } /* * s3c2410_udc_wakeup */ static int s3c2410_udc_wakeup(struct usb_gadget *_gadget) { dprintk(DEBUG_NORMAL, "%s()\n", __func__); return 0; } /* * s3c2410_udc_set_selfpowered */ static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value) { struct s3c2410_udc *udc = to_s3c2410_udc(gadget); dprintk(DEBUG_NORMAL, "%s()\n", __func__); if (value) udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED); else udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED); return 0; } static void s3c2410_udc_disable(struct s3c2410_udc *dev); static void s3c2410_udc_enable(struct s3c2410_udc *dev); static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on) { dprintk(DEBUG_NORMAL, "%s()\n", __func__); if (udc_info && udc_info->udc_command) { if (is_on) s3c2410_udc_enable(udc); else { if (udc->gadget.speed != USB_SPEED_UNKNOWN) { if (udc->driver && udc->driver->disconnect) udc->driver->disconnect(&udc->gadget); } s3c2410_udc_disable(udc); } } else return -EOPNOTSUPP; return 0; } static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active) { struct s3c2410_udc *udc = to_s3c2410_udc(gadget); dprintk(DEBUG_NORMAL, "%s()\n", __func__); udc->vbus = (is_active != 0); s3c2410_udc_set_pullup(udc, is_active); return 0; } static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on) { struct s3c2410_udc *udc = to_s3c2410_udc(gadget); dprintk(DEBUG_NORMAL, "%s()\n", __func__); s3c2410_udc_set_pullup(udc, is_on ? 0 : 1); return 0; } static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev) { struct s3c2410_udc *dev = _dev; unsigned int value; dprintk(DEBUG_NORMAL, "%s()\n", __func__); /* some cpus cannot read from an line configured to IRQ! */ s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_INPUT); value = s3c2410_gpio_getpin(udc_info->vbus_pin); s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_SFN2); if (udc_info->vbus_pin_inverted) value = !value; if (value != dev->vbus) s3c2410_udc_vbus_session(&dev->gadget, value); return IRQ_HANDLED; } static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma) { dprintk(DEBUG_NORMAL, "%s()\n", __func__); if (udc_info && udc_info->vbus_draw) { udc_info->vbus_draw(ma); return 0; } return -ENOTSUPP; } static const struct usb_gadget_ops s3c2410_ops = { .get_frame = s3c2410_udc_get_frame, .wakeup = s3c2410_udc_wakeup, .set_selfpowered = s3c2410_udc_set_selfpowered, .pullup = s3c2410_udc_pullup, .vbus_session = s3c2410_udc_vbus_session, .vbus_draw = s3c2410_vbus_draw, }; /*------------------------- gadget driver handling---------------------------*/ /* * s3c2410_udc_disable */ static void s3c2410_udc_disable(struct s3c2410_udc *dev) { dprintk(DEBUG_NORMAL, "%s()\n", __func__); /* Disable all interrupts */ udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG); udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG); /* Clear the interrupt registers */ udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_RESUME | S3C2410_UDC_USBINT_SUSPEND, S3C2410_UDC_USB_INT_REG); udc_write(0x1F, S3C2410_UDC_EP_INT_REG); /* Good bye, cruel world */ if (udc_info && udc_info->udc_command) udc_info->udc_command(S3C2410_UDC_P_DISABLE); /* Set speed to unknown */ dev->gadget.speed = USB_SPEED_UNKNOWN; } /* * s3c2410_udc_reinit */ static void s3c2410_udc_reinit(struct s3c2410_udc *dev) { u32 i; /* device/ep0 records init */ INIT_LIST_HEAD (&dev->gadget.ep_list); INIT_LIST_HEAD (&dev->gadget.ep0->ep_list); dev->ep0state = EP0_IDLE; for (i = 0; i < S3C2410_ENDPOINTS; i++) { struct s3c2410_ep *ep = &dev->ep[i]; if (i != 0) list_add_tail (&ep->ep.ep_list, &dev->gadget.ep_list); ep->dev = dev; ep->desc = NULL; ep->halted = 0; INIT_LIST_HEAD (&ep->queue); } } /* * s3c2410_udc_enable */ static void s3c2410_udc_enable(struct s3c2410_udc *dev) { int i; dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n"); /* dev->gadget.speed = USB_SPEED_UNKNOWN; */ dev->gadget.speed = USB_SPEED_FULL; /* Set MAXP for all endpoints */ for (i = 0; i < S3C2410_ENDPOINTS; i++) { udc_write(i, S3C2410_UDC_INDEX_REG); udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3, S3C2410_UDC_MAXP_REG); } /* Set default power state */ udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG); /* Enable reset and suspend interrupt interrupts */ udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND, S3C2410_UDC_USB_INT_EN_REG); /* Enable ep0 interrupt */ udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG); /* time to say "hello, world" */ if (udc_info && udc_info->udc_command) udc_info->udc_command(S3C2410_UDC_P_ENABLE); } /* * usb_gadget_register_driver */ int usb_gadget_register_driver(struct usb_gadget_driver *driver) { struct s3c2410_udc *udc = the_controller; int retval; dprintk(DEBUG_NORMAL, "usb_gadget_register_driver() '%s'\n", driver->driver.name); /* Sanity checks */ if (!udc) return -ENODEV; if (udc->driver) return -EBUSY; if (!driver->bind || !driver->setup || driver->speed != USB_SPEED_FULL) { printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n", driver->bind, driver->setup, driver->speed); return -EINVAL; } #if defined(MODULE) if (!driver->unbind) { printk(KERN_ERR "Invalid driver: no unbind method\n"); return -EINVAL; } #endif /* Hook the driver */ udc->driver = driver; udc->gadget.dev.driver = &driver->driver; /* Bind the driver */ if ((retval = device_add(&udc->gadget.dev)) != 0) { printk(KERN_ERR "Error in device_add() : %d\n",retval); goto register_error; } dprintk(DEBUG_NORMAL, "binding gadget driver '%s'\n", driver->driver.name); if ((retval = driver->bind (&udc->gadget)) != 0) { device_del(&udc->gadget.dev); goto register_error; } /* Enable udc */ s3c2410_udc_enable(udc); return 0; register_error: udc->driver = NULL; udc->gadget.dev.driver = NULL; return retval; } /* * usb_gadget_unregister_driver */ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) { struct s3c2410_udc *udc = the_controller; if (!udc) return -ENODEV; if (!driver || driver != udc->driver || !driver->unbind) return -EINVAL; dprintk(DEBUG_NORMAL,"usb_gadget_register_driver() '%s'\n", driver->driver.name); if (driver->disconnect) driver->disconnect(&udc->gadget); device_del(&udc->gadget.dev); udc->driver = NULL; /* Disable udc */ s3c2410_udc_disable(udc); return 0; } /*---------------------------------------------------------------------------*/ static struct s3c2410_udc memory = { .gadget = { .ops = &s3c2410_ops, .ep0 = &memory.ep[0].ep, .name = gadget_name, .dev = { .bus_id = "gadget", }, }, /* control endpoint */ .ep[0] = { .num = 0, .ep = { .name = ep0name, .ops = &s3c2410_ep_ops, .maxpacket = EP0_FIFO_SIZE, }, .dev = &memory, }, /* first group of endpoints */ .ep[1] = { .num = 1, .ep = { .name = "ep1-bulk", .ops = &s3c2410_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .fifo_size = EP_FIFO_SIZE, .bEndpointAddress = 1, .bmAttributes = USB_ENDPOINT_XFER_BULK, }, .ep[2] = { .num = 2, .ep = { .name = "ep2-bulk", .ops = &s3c2410_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .fifo_size = EP_FIFO_SIZE, .bEndpointAddress = 2, .bmAttributes = USB_ENDPOINT_XFER_BULK, }, .ep[3] = { .num = 3, .ep = { .name = "ep3-bulk", .ops = &s3c2410_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .fifo_size = EP_FIFO_SIZE, .bEndpointAddress = 3, .bmAttributes = USB_ENDPOINT_XFER_BULK, }, .ep[4] = { .num = 4, .ep = { .name = "ep4-bulk", .ops = &s3c2410_ep_ops, .maxpacket = EP_FIFO_SIZE, }, .dev = &memory, .fifo_size = EP_FIFO_SIZE, .bEndpointAddress = 4, .bmAttributes = USB_ENDPOINT_XFER_BULK, } }; /* * probe - binds to the platform device */ static int s3c2410_udc_probe(struct platform_device *pdev) { struct s3c2410_udc *udc = &memory; struct device *dev = &pdev->dev; int retval; unsigned int irq; dev_dbg(dev, "%s()\n", __func__); usb_bus_clock = clk_get(NULL, "usb-bus-gadget"); if (IS_ERR(usb_bus_clock)) { dev_err(dev, "failed to get usb bus clock source\n"); return PTR_ERR(usb_bus_clock); } clk_enable(usb_bus_clock); udc_clock = clk_get(NULL, "usb-device"); if (IS_ERR(udc_clock)) { dev_err(dev, "failed to get udc clock source\n"); return PTR_ERR(udc_clock); } clk_enable(udc_clock); mdelay(10); dev_dbg(dev, "got and enabled clocks\n"); if (strncmp(pdev->name, "s3c2440", 7) == 0) { dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n"); memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE; memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE; memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE; memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE; } spin_lock_init (&udc->lock); udc_info = pdev->dev.platform_data; rsrc_start = S3C2410_PA_USBDEV; rsrc_len = S3C24XX_SZ_USBDEV; if (!request_mem_region(rsrc_start, rsrc_len, gadget_name)) return -EBUSY; base_addr = ioremap(rsrc_start, rsrc_len); if (!base_addr) { retval = -ENOMEM; goto err_mem; } device_initialize(&udc->gadget.dev); udc->gadget.dev.parent = &pdev->dev; udc->gadget.dev.dma_mask = pdev->dev.dma_mask; the_controller = udc; platform_set_drvdata(pdev, udc); s3c2410_udc_disable(udc); s3c2410_udc_reinit(udc); /* irq setup after old hardware state is cleaned up */ retval = request_irq(IRQ_USBD, s3c2410_udc_irq, IRQF_DISABLED, gadget_name, udc); if (retval != 0) { dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval); retval = -EBUSY; goto err_map; } dev_dbg(dev, "got irq %i\n", IRQ_USBD); if (udc_info && udc_info->vbus_pin > 0) { irq = s3c2410_gpio_getirq(udc_info->vbus_pin); retval = request_irq(irq, s3c2410_udc_vbus_irq, IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_SHARED, gadget_name, udc); if (retval != 0) { dev_err(dev, "can't get vbus irq %i, err %d\n", irq, retval); retval = -EBUSY; goto err_int; } dev_dbg(dev, "got irq %i\n", irq); } else { udc->vbus = 1; } if (s3c2410_udc_debugfs_root) { udc->regs_info = debugfs_create_file("registers", S_IRUGO, s3c2410_udc_debugfs_root, udc, &s3c2410_udc_debugfs_fops); if (IS_ERR(udc->regs_info)) { dev_warn(dev, "debugfs file creation failed %ld\n", PTR_ERR(udc->regs_info)); udc->regs_info = NULL; } } dev_dbg(dev, "probe ok\n"); return 0; err_int: free_irq(IRQ_USBD, udc); err_map: iounmap(base_addr); err_mem: release_mem_region(rsrc_start, rsrc_len); return retval; } /* * s3c2410_udc_remove */ static int s3c2410_udc_remove(struct platform_device *pdev) { struct s3c2410_udc *udc = platform_get_drvdata(pdev); unsigned int irq; dev_dbg(&pdev->dev, "%s()\n", __func__); if (udc->driver) return -EBUSY; debugfs_remove(udc->regs_info); if (udc_info && udc_info->vbus_pin > 0) { irq = s3c2410_gpio_getirq(udc_info->vbus_pin); free_irq(irq, udc); } free_irq(IRQ_USBD, udc); iounmap(base_addr); release_mem_region(rsrc_start, rsrc_len); platform_set_drvdata(pdev, NULL); if (!IS_ERR(udc_clock) && udc_clock != NULL) { clk_disable(udc_clock); clk_put(udc_clock); udc_clock = NULL; } if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) { clk_disable(usb_bus_clock); clk_put(usb_bus_clock); usb_bus_clock = NULL; } dev_dbg(&pdev->dev, "%s: remove ok\n", __func__); return 0; } #ifdef CONFIG_PM static int s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message) { if (udc_info && udc_info->udc_command) udc_info->udc_command(S3C2410_UDC_P_DISABLE); return 0; } static int s3c2410_udc_resume(struct platform_device *pdev) { if (udc_info && udc_info->udc_command) udc_info->udc_command(S3C2410_UDC_P_ENABLE); return 0; } #else #define s3c2410_udc_suspend NULL #define s3c2410_udc_resume NULL #endif static struct platform_driver udc_driver_2410 = { .driver = { .name = "s3c2410-usbgadget", .owner = THIS_MODULE, }, .probe = s3c2410_udc_probe, .remove = s3c2410_udc_remove, .suspend = s3c2410_udc_suspend, .resume = s3c2410_udc_resume, }; static struct platform_driver udc_driver_2440 = { .driver = { .name = "s3c2440-usbgadget", .owner = THIS_MODULE, }, .probe = s3c2410_udc_probe, .remove = s3c2410_udc_remove, .suspend = s3c2410_udc_suspend, .resume = s3c2410_udc_resume, }; static int __init udc_init(void) { int retval; dprintk(DEBUG_NORMAL, "%s: version %s\n", gadget_name, DRIVER_VERSION); s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL); if (IS_ERR(s3c2410_udc_debugfs_root)) { printk(KERN_ERR "%s: debugfs dir creation failed %ld\n", gadget_name, PTR_ERR(s3c2410_udc_debugfs_root)); s3c2410_udc_debugfs_root = NULL; } retval = platform_driver_register(&udc_driver_2410); if (retval) goto err; retval = platform_driver_register(&udc_driver_2440); if (retval) goto err; return 0; err: debugfs_remove(s3c2410_udc_debugfs_root); return retval; } static void __exit udc_exit(void) { platform_driver_unregister(&udc_driver_2410); platform_driver_unregister(&udc_driver_2440); debugfs_remove(s3c2410_udc_debugfs_root); } EXPORT_SYMBOL(usb_gadget_unregister_driver); EXPORT_SYMBOL(usb_gadget_register_driver); module_init(udc_init); module_exit(udc_exit); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_VERSION(DRIVER_VERSION); MODULE_LICENSE("GPL");