diff options
Diffstat (limited to 'drivers/usb/gadget/udc/s3c2410_udc.c')
| -rw-r--r-- | drivers/usb/gadget/udc/s3c2410_udc.c | 2012 |
1 files changed, 2012 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc/s3c2410_udc.c b/drivers/usb/gadget/udc/s3c2410_udc.c new file mode 100644 index 000000000..6cc63e317 --- /dev/null +++ b/drivers/usb/gadget/udc/s3c2410_udc.c @@ -0,0 +1,2012 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * linux/drivers/usb/gadget/s3c2410_udc.c + * + * Samsung S3C24xx series on-chip full speed USB device controllers + * + * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard + * Additional cleanups by Ben Dooks <ben-linux@fluff.org> + */ + +#define pr_fmt(fmt) "s3c2410_udc: " fmt + +#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/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/clk.h> +#include <linux/gpio.h> +#include <linux/prefetch.h> +#include <linux/io.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/irq.h> +#include <asm/unaligned.h> +#include <mach/irqs.h> + +#include <mach/hardware.h> + +#include <plat/regs-udc.h> +#include <linux/platform_data/usb-s3c2410_udc.h> + + +#include "s3c2410_udc.h" + +#define DRIVER_DESC "S3C2410 USB Device Controller Gadget" +#define DRIVER_AUTHOR "Herbert Pötzl <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; + +__printf(2, 3) +static void dprintk(int level, const char *fmt, ...) +{ + static long prevticks; + static int invocation; + struct va_format vaf; + va_list args; + + if (level > USB_S3C2410_DEBUG_LEVEL) + return; + + va_start(args, fmt); + + vaf.fmt = fmt; + vaf.va = &args; + + if (s3c2410_ticks != prevticks) { + prevticks = s3c2410_ticks; + invocation = 0; + } + + pr_debug("%1lu.%02d USB: %pV", prevticks, invocation++, &vaf); + + va_end(args); +} +#else +__printf(2, 3) +static void dprintk(int level, const char *fmt, ...) +{ +} +#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_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; + usb_gadget_giveback_request(&ep->ep, &req->req); + ep->halted = halted; +} + +static void s3c2410_udc_nuke(struct s3c2410_udc *udc, + struct s3c2410_ep *ep, int status) +{ + 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 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; + + if (!dev->driver) + return; + + /* deliver the request to the gadget driver */ + 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 <mach/regs-irq.h> + +/* + * s3c2410_udc_irq - interrupt handler + */ +static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev) +{ + struct s3c2410_udc *dev = _dev; + int usb_status; + int usbd_status; + int pwr_reg; + int ep0csr; + int i; + u32 idx, idx2; + 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]); + } + } + + /* what else causes this interrupt? a receive! who is it? */ + if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) { + for (i = 1; i < S3C2410_ENDPOINTS; i++) { + idx2 = udc_read(S3C2410_UDC_INDEX_REG); + udc_write(i, S3C2410_UDC_INDEX_REG); + + if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1) + s3c2410_udc_handle_ep(&dev->ep[i]); + + /* restore index */ + udc_write(idx2, S3C2410_UDC_INDEX_REG); + } + } + + dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD); + + /* 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->name == ep0name + || desc->bDescriptorType != USB_DT_ENDPOINT) + return -EINVAL; + + dev = ep->dev; + if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) + return -ESHUTDOWN; + + max = usb_endpoint_maxp(desc); + + local_irq_save(flags); + _ep->maxpacket = max; + ep->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->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->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->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->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)) + 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->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__); + + gadget->is_selfpowered = (value != 0); + 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 || + gpio_is_valid(udc_info->pullup_pin))) { + + 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); + 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__); + + value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0; + 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 int s3c2410_udc_start(struct usb_gadget *g, + struct usb_gadget_driver *driver); +static int s3c2410_udc_stop(struct usb_gadget *g); + +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, + .udc_start = s3c2410_udc_start, + .udc_stop = s3c2410_udc_stop, +}; + +static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd) +{ + if (!udc_info) + return; + + if (udc_info->udc_command) { + udc_info->udc_command(cmd); + } else if (gpio_is_valid(udc_info->pullup_pin)) { + int value; + + switch (cmd) { + case S3C2410_UDC_P_ENABLE: + value = 1; + break; + case S3C2410_UDC_P_DISABLE: + value = 0; + break; + default: + return; + } + value ^= udc_info->pullup_pin_inverted; + + gpio_set_value(udc_info->pullup_pin, value); + } +} + +/*------------------------- 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 */ + s3c2410_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->ep.desc = NULL; + ep->halted = 0; + INIT_LIST_HEAD(&ep->queue); + usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket); + } +} + +/* + * 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" */ + s3c2410_udc_command(S3C2410_UDC_P_ENABLE); +} + +static int s3c2410_udc_start(struct usb_gadget *g, + struct usb_gadget_driver *driver) +{ + struct s3c2410_udc *udc = to_s3c2410(g); + + dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name); + + /* Hook the driver */ + udc->driver = driver; + + /* Enable udc */ + s3c2410_udc_enable(udc); + + return 0; +} + +static int s3c2410_udc_stop(struct usb_gadget *g) +{ + struct s3c2410_udc *udc = to_s3c2410(g); + + 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 = { + .init_name = "gadget", + }, + }, + + /* control endpoint */ + .ep[0] = { + .num = 0, + .ep = { + .name = ep0name, + .ops = &s3c2410_ep_ops, + .maxpacket = EP0_FIFO_SIZE, + .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, + USB_EP_CAPS_DIR_ALL), + }, + .dev = &memory, + }, + + /* first group of endpoints */ + .ep[1] = { + .num = 1, + .ep = { + .name = "ep1-bulk", + .ops = &s3c2410_ep_ops, + .maxpacket = EP_FIFO_SIZE, + .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, + USB_EP_CAPS_DIR_ALL), + }, + .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, + .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, + USB_EP_CAPS_DIR_ALL), + }, + .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, + .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, + USB_EP_CAPS_DIR_ALL), + }, + .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, + .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, + USB_EP_CAPS_DIR_ALL), + }, + .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; + 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_prepare_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_prepare_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 = dev_get_platdata(&pdev->dev); + + 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; + } + + 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, + 0, 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) { + retval = gpio_request(udc_info->vbus_pin, "udc vbus"); + if (retval < 0) { + dev_err(dev, "cannot claim vbus pin\n"); + goto err_int; + } + + irq = gpio_to_irq(udc_info->vbus_pin); + if (irq < 0) { + dev_err(dev, "no irq for gpio vbus pin\n"); + retval = irq; + goto err_gpio_claim; + } + + retval = request_irq(irq, s3c2410_udc_vbus_irq, + IRQF_TRIGGER_RISING + | IRQF_TRIGGER_FALLING | IRQF_SHARED, + gadget_name, udc); + + if (retval != 0) { + dev_err(dev, "can't get vbus irq %d, err %d\n", + irq, retval); + retval = -EBUSY; + goto err_gpio_claim; + } + + dev_dbg(dev, "got irq %i\n", irq); + } else { + udc->vbus = 1; + } + + if (udc_info && !udc_info->udc_command && + gpio_is_valid(udc_info->pullup_pin)) { + + retval = gpio_request_one(udc_info->pullup_pin, + udc_info->vbus_pin_inverted ? + GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW, + "udc pullup"); + if (retval) + goto err_vbus_irq; + } + + retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget); + if (retval) + goto err_add_udc; + + udc->regs_info = debugfs_create_file("registers", S_IRUGO, + s3c2410_udc_debugfs_root, udc, + &s3c2410_udc_debugfs_fops); + + dev_dbg(dev, "probe ok\n"); + + return 0; + +err_add_udc: + if (udc_info && !udc_info->udc_command && + gpio_is_valid(udc_info->pullup_pin)) + gpio_free(udc_info->pullup_pin); +err_vbus_irq: + if (udc_info && udc_info->vbus_pin > 0) + free_irq(gpio_to_irq(udc_info->vbus_pin), udc); +err_gpio_claim: + if (udc_info && udc_info->vbus_pin > 0) + gpio_free(udc_info->vbus_pin); +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; + + usb_del_gadget_udc(&udc->gadget); + debugfs_remove(udc->regs_info); + + if (udc_info && !udc_info->udc_command && + gpio_is_valid(udc_info->pullup_pin)) + gpio_free(udc_info->pullup_pin); + + if (udc_info && udc_info->vbus_pin > 0) { + irq = gpio_to_irq(udc_info->vbus_pin); + free_irq(irq, udc); + } + + free_irq(IRQ_USBD, udc); + + iounmap(base_addr); + release_mem_region(rsrc_start, rsrc_len); + + if (!IS_ERR(udc_clock) && udc_clock != NULL) { + clk_disable_unprepare(udc_clock); + clk_put(udc_clock); + udc_clock = NULL; + } + + if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) { + clk_disable_unprepare(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) +{ + s3c2410_udc_command(S3C2410_UDC_P_DISABLE); + + return 0; +} + +static int s3c2410_udc_resume(struct platform_device *pdev) +{ + s3c2410_udc_command(S3C2410_UDC_P_ENABLE); + + return 0; +} +#else +#define s3c2410_udc_suspend NULL +#define s3c2410_udc_resume NULL +#endif + +static const struct platform_device_id s3c_udc_ids[] = { + { "s3c2410-usbgadget", }, + { "s3c2440-usbgadget", }, + { } +}; +MODULE_DEVICE_TABLE(platform, s3c_udc_ids); + +static struct platform_driver udc_driver_24x0 = { + .driver = { + .name = "s3c24x0-usbgadget", + }, + .probe = s3c2410_udc_probe, + .remove = s3c2410_udc_remove, + .suspend = s3c2410_udc_suspend, + .resume = s3c2410_udc_resume, + .id_table = s3c_udc_ids, +}; + +static int __init udc_init(void) +{ + int retval; + + dprintk(DEBUG_NORMAL, "%s\n", gadget_name); + + s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL); + + retval = platform_driver_register(&udc_driver_24x0); + 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_24x0); + debugfs_remove_recursive(s3c2410_udc_debugfs_root); +} + +module_init(udc_init); +module_exit(udc_exit); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_LICENSE("GPL"); |