diff options
Diffstat (limited to 'drivers/usb/gadget/lh7a40x_udc.c')
| -rw-r--r-- | drivers/usb/gadget/lh7a40x_udc.c | 2167 |
1 files changed, 2167 insertions, 0 deletions
diff --git a/drivers/usb/gadget/lh7a40x_udc.c b/drivers/usb/gadget/lh7a40x_udc.c new file mode 100644 index 00000000000..0def9f70e88 --- /dev/null +++ b/drivers/usb/gadget/lh7a40x_udc.c @@ -0,0 +1,2167 @@ +/* + * linux/drivers/usb/gadget/lh7a40x_udc.c + * Sharp LH7A40x on-chip full speed USB device controllers + * + * Copyright (C) 2004 Mikko Lahteenmaki, Nordic ID + * Copyright (C) 2004 Bo Henriksen, Nordic ID + * + * 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 "lh7a40x_udc.h" + +//#define DEBUG printk +//#define DEBUG_EP0 printk +//#define DEBUG_SETUP printk + +#ifndef DEBUG_EP0 +# define DEBUG_EP0(fmt,args...) +#endif +#ifndef DEBUG_SETUP +# define DEBUG_SETUP(fmt,args...) +#endif +#ifndef DEBUG +# define NO_STATES +# define DEBUG(fmt,args...) +#endif + +#define DRIVER_DESC "LH7A40x USB Device Controller" +#define DRIVER_VERSION __DATE__ + +#ifndef _BIT /* FIXME - what happended to _BIT in 2.6.7bk18? */ +#define _BIT(x) (1<<(x)) +#endif + +struct lh7a40x_udc *the_controller; + +static const char driver_name[] = "lh7a40x_udc"; +static const char driver_desc[] = DRIVER_DESC; +static const char ep0name[] = "ep0-control"; + +/* + Local definintions. +*/ + +#ifndef NO_STATES +static char *state_names[] = { + "WAIT_FOR_SETUP", + "DATA_STATE_XMIT", + "DATA_STATE_NEED_ZLP", + "WAIT_FOR_OUT_STATUS", + "DATA_STATE_RECV" +}; +#endif + +/* + Local declarations. +*/ +static int lh7a40x_ep_enable(struct usb_ep *ep, + const struct usb_endpoint_descriptor *); +static int lh7a40x_ep_disable(struct usb_ep *ep); +static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, int); +static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *); +static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned, dma_addr_t *, + int); +static void lh7a40x_free_buffer(struct usb_ep *ep, void *, dma_addr_t, + unsigned); +static int lh7a40x_queue(struct usb_ep *ep, struct usb_request *, int); +static int lh7a40x_dequeue(struct usb_ep *ep, struct usb_request *); +static int lh7a40x_set_halt(struct usb_ep *ep, int); +static int lh7a40x_fifo_status(struct usb_ep *ep); +static int lh7a40x_fifo_status(struct usb_ep *ep); +static void lh7a40x_fifo_flush(struct usb_ep *ep); +static void lh7a40x_ep0_kick(struct lh7a40x_udc *dev, struct lh7a40x_ep *ep); +static void lh7a40x_handle_ep0(struct lh7a40x_udc *dev, u32 intr); + +static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, + int status); +static void pio_irq_enable(int bEndpointAddress); +static void pio_irq_disable(int bEndpointAddress); +static void stop_activity(struct lh7a40x_udc *dev, + struct usb_gadget_driver *driver); +static void flush(struct lh7a40x_ep *ep); +static void udc_enable(struct lh7a40x_udc *dev); +static void udc_set_address(struct lh7a40x_udc *dev, unsigned char address); + +static struct usb_ep_ops lh7a40x_ep_ops = { + .enable = lh7a40x_ep_enable, + .disable = lh7a40x_ep_disable, + + .alloc_request = lh7a40x_alloc_request, + .free_request = lh7a40x_free_request, + + .alloc_buffer = lh7a40x_alloc_buffer, + .free_buffer = lh7a40x_free_buffer, + + .queue = lh7a40x_queue, + .dequeue = lh7a40x_dequeue, + + .set_halt = lh7a40x_set_halt, + .fifo_status = lh7a40x_fifo_status, + .fifo_flush = lh7a40x_fifo_flush, +}; + +/* Inline code */ + +static __inline__ int write_packet(struct lh7a40x_ep *ep, + struct lh7a40x_request *req, int max) +{ + u8 *buf; + int length, count; + volatile u32 *fifo = (volatile u32 *)ep->fifo; + + buf = req->req.buf + req->req.actual; + prefetch(buf); + + length = req->req.length - req->req.actual; + length = min(length, max); + req->req.actual += length; + + DEBUG("Write %d (max %d), fifo %p\n", length, max, fifo); + + count = length; + while (count--) { + *fifo = *buf++; + } + + return length; +} + +static __inline__ void usb_set_index(u32 ep) +{ + *(volatile u32 *)io_p2v(USB_INDEX) = ep; +} + +static __inline__ u32 usb_read(u32 port) +{ + return *(volatile u32 *)io_p2v(port); +} + +static __inline__ void usb_write(u32 val, u32 port) +{ + *(volatile u32 *)io_p2v(port) = val; +} + +static __inline__ void usb_set(u32 val, u32 port) +{ + volatile u32 *ioport = (volatile u32 *)io_p2v(port); + u32 after = (*ioport) | val; + *ioport = after; +} + +static __inline__ void usb_clear(u32 val, u32 port) +{ + volatile u32 *ioport = (volatile u32 *)io_p2v(port); + u32 after = (*ioport) & ~val; + *ioport = after; +} + +/*-------------------------------------------------------------------------*/ + +#define GPIO_PORTC_DR (0x80000E08) +#define GPIO_PORTC_DDR (0x80000E18) +#define GPIO_PORTC_PDR (0x80000E70) + +/* get port C pin data register */ +#define get_portc_pdr(bit) ((usb_read(GPIO_PORTC_PDR) & _BIT(bit)) != 0) +/* get port C data direction register */ +#define get_portc_ddr(bit) ((usb_read(GPIO_PORTC_DDR) & _BIT(bit)) != 0) +/* set port C data register */ +#define set_portc_dr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DR) : usb_clear(_BIT(bit), GPIO_PORTC_DR)) +/* set port C data direction register */ +#define set_portc_ddr(bit, val) (val ? usb_set(_BIT(bit), GPIO_PORTC_DDR) : usb_clear(_BIT(bit), GPIO_PORTC_DDR)) + +/* + * LPD7A404 GPIO's: + * Port C bit 1 = USB Port 1 Power Enable + * Port C bit 2 = USB Port 1 Data Carrier Detect + */ +#define is_usb_connected() get_portc_pdr(2) + +#ifdef CONFIG_USB_GADGET_DEBUG_FILES + +static const char proc_node_name[] = "driver/udc"; + +static int +udc_proc_read(char *page, char **start, off_t off, int count, + int *eof, void *_dev) +{ + char *buf = page; + struct lh7a40x_udc *dev = _dev; + char *next = buf; + unsigned size = count; + unsigned long flags; + int t; + + if (off != 0) + return 0; + + local_irq_save(flags); + + /* basic device status */ + t = scnprintf(next, size, + DRIVER_DESC "\n" + "%s version: %s\n" + "Gadget driver: %s\n" + "Host: %s\n\n", + driver_name, DRIVER_VERSION, + dev->driver ? dev->driver->driver.name : "(none)", + is_usb_connected()? "full speed" : "disconnected"); + size -= t; + next += t; + + t = scnprintf(next, size, + "GPIO:\n" + " Port C bit 1: %d, dir %d\n" + " Port C bit 2: %d, dir %d\n\n", + get_portc_pdr(1), get_portc_ddr(1), + get_portc_pdr(2), get_portc_ddr(2) + ); + size -= t; + next += t; + + t = scnprintf(next, size, + "DCP pullup: %d\n\n", + (usb_read(USB_PM) & PM_USB_DCP) != 0); + size -= t; + next += t; + + local_irq_restore(flags); + *eof = 1; + return count - size; +} + +#define create_proc_files() create_proc_read_entry(proc_node_name, 0, NULL, udc_proc_read, dev) +#define remove_proc_files() remove_proc_entry(proc_node_name, NULL) + +#else /* !CONFIG_USB_GADGET_DEBUG_FILES */ + +#define create_proc_files() do {} while (0) +#define remove_proc_files() do {} while (0) + +#endif /* CONFIG_USB_GADGET_DEBUG_FILES */ + +/* + * udc_disable - disable USB device controller + */ +static void udc_disable(struct lh7a40x_udc *dev) +{ + DEBUG("%s, %p\n", __FUNCTION__, dev); + + udc_set_address(dev, 0); + + /* Disable interrupts */ + usb_write(0, USB_IN_INT_EN); + usb_write(0, USB_OUT_INT_EN); + usb_write(0, USB_INT_EN); + + /* Disable the USB */ + usb_write(0, USB_PM); + +#ifdef CONFIG_ARCH_LH7A404 + /* Disable USB power */ + set_portc_dr(1, 0); +#endif + + /* if hardware supports it, disconnect from usb */ + /* make_usb_disappear(); */ + + dev->ep0state = WAIT_FOR_SETUP; + dev->gadget.speed = USB_SPEED_UNKNOWN; + dev->usb_address = 0; +} + +/* + * udc_reinit - initialize software state + */ +static void udc_reinit(struct lh7a40x_udc *dev) +{ + u32 i; + + DEBUG("%s, %p\n", __FUNCTION__, dev); + + /* device/ep0 records init */ + INIT_LIST_HEAD(&dev->gadget.ep_list); + INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); + dev->ep0state = WAIT_FOR_SETUP; + + /* basic endpoint records init */ + for (i = 0; i < UDC_MAX_ENDPOINTS; i++) { + struct lh7a40x_ep *ep = &dev->ep[i]; + + if (i != 0) + list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list); + + ep->desc = 0; + ep->stopped = 0; + INIT_LIST_HEAD(&ep->queue); + ep->pio_irqs = 0; + } + + /* the rest was statically initialized, and is read-only */ +} + +#define BYTES2MAXP(x) (x / 8) +#define MAXP2BYTES(x) (x * 8) + +/* until it's enabled, this UDC should be completely invisible + * to any USB host. + */ +static void udc_enable(struct lh7a40x_udc *dev) +{ + int ep; + + DEBUG("%s, %p\n", __FUNCTION__, dev); + + dev->gadget.speed = USB_SPEED_UNKNOWN; + +#ifdef CONFIG_ARCH_LH7A404 + /* Set Port C bit 1 & 2 as output */ + set_portc_ddr(1, 1); + set_portc_ddr(2, 1); + + /* Enable USB power */ + set_portc_dr(1, 0); +#endif + + /* + * C.f Chapter 18.1.3.1 Initializing the USB + */ + + /* Disable the USB */ + usb_clear(PM_USB_ENABLE, USB_PM); + + /* Reset APB & I/O sides of the USB */ + usb_set(USB_RESET_APB | USB_RESET_IO, USB_RESET); + mdelay(5); + usb_clear(USB_RESET_APB | USB_RESET_IO, USB_RESET); + + /* Set MAXP values for each */ + for (ep = 0; ep < UDC_MAX_ENDPOINTS; ep++) { + struct lh7a40x_ep *ep_reg = &dev->ep[ep]; + u32 csr; + + usb_set_index(ep); + + switch (ep_reg->ep_type) { + case ep_bulk_in: + case ep_interrupt: + usb_clear(USB_IN_CSR2_USB_DMA_EN | USB_IN_CSR2_AUTO_SET, + ep_reg->csr2); + /* Fall through */ + case ep_control: + usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)), + USB_IN_MAXP); + break; + case ep_bulk_out: + usb_clear(USB_OUT_CSR2_USB_DMA_EN | + USB_OUT_CSR2_AUTO_CLR, ep_reg->csr2); + usb_write(BYTES2MAXP(ep_maxpacket(ep_reg)), + USB_OUT_MAXP); + break; + } + + /* Read & Write CSR1, just in case */ + csr = usb_read(ep_reg->csr1); + usb_write(csr, ep_reg->csr1); + + flush(ep_reg); + } + + /* Disable interrupts */ + usb_write(0, USB_IN_INT_EN); + usb_write(0, USB_OUT_INT_EN); + usb_write(0, USB_INT_EN); + + /* Enable interrupts */ + usb_set(USB_IN_INT_EP0, USB_IN_INT_EN); + usb_set(USB_INT_RESET_INT | USB_INT_RESUME_INT, USB_INT_EN); + /* Dont enable rest of the interrupts */ + /* usb_set(USB_IN_INT_EP3 | USB_IN_INT_EP1 | USB_IN_INT_EP0, USB_IN_INT_EN); + usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); */ + + /* Enable SUSPEND */ + usb_set(PM_ENABLE_SUSPEND, USB_PM); + + /* Enable the USB */ + usb_set(PM_USB_ENABLE, USB_PM); + +#ifdef CONFIG_ARCH_LH7A404 + /* NOTE: DOES NOT WORK! */ + /* Let host detect UDC: + * Software must write a 0 to the PMR:DCP_CTRL bit to turn this + * transistor on and pull the USBDP pin HIGH. + */ + /* usb_clear(PM_USB_DCP, USB_PM); + usb_set(PM_USB_DCP, USB_PM); */ +#endif +} + +/* + Register entry point for the peripheral controller driver. +*/ +int usb_gadget_register_driver(struct usb_gadget_driver *driver) +{ + struct lh7a40x_udc *dev = the_controller; + int retval; + + DEBUG("%s: %s\n", __FUNCTION__, driver->driver.name); + + if (!driver + || driver->speed != USB_SPEED_FULL + || !driver->bind + || !driver->unbind || !driver->disconnect || !driver->setup) + return -EINVAL; + if (!dev) + return -ENODEV; + if (dev->driver) + return -EBUSY; + + /* first hook up the driver ... */ + dev->driver = driver; + dev->gadget.dev.driver = &driver->driver; + + device_add(&dev->gadget.dev); + retval = driver->bind(&dev->gadget); + if (retval) { + printk("%s: bind to driver %s --> error %d\n", dev->gadget.name, + driver->driver.name, retval); + device_del(&dev->gadget.dev); + + dev->driver = 0; + dev->gadget.dev.driver = 0; + return retval; + } + + /* ... then enable host detection and ep0; and we're ready + * for set_configuration as well as eventual disconnect. + * NOTE: this shouldn't power up until later. + */ + printk("%s: registered gadget driver '%s'\n", dev->gadget.name, + driver->driver.name); + + udc_enable(dev); + + return 0; +} + +EXPORT_SYMBOL(usb_gadget_register_driver); + +/* + Unregister entry point for the peripheral controller driver. +*/ +int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) +{ + struct lh7a40x_udc *dev = the_controller; + unsigned long flags; + + if (!dev) + return -ENODEV; + if (!driver || driver != dev->driver) + return -EINVAL; + + spin_lock_irqsave(&dev->lock, flags); + dev->driver = 0; + stop_activity(dev, driver); + spin_unlock_irqrestore(&dev->lock, flags); + + driver->unbind(&dev->gadget); + device_del(&dev->gadget.dev); + + udc_disable(dev); + + DEBUG("unregistered gadget driver '%s'\n", driver->driver.name); + return 0; +} + +EXPORT_SYMBOL(usb_gadget_unregister_driver); + +/*-------------------------------------------------------------------------*/ + +/** Write request to FIFO (max write == maxp size) + * Return: 0 = still running, 1 = completed, negative = errno + * NOTE: INDEX register must be set for EP + */ +static int write_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req) +{ + u32 max; + u32 csr; + + max = le16_to_cpu(ep->desc->wMaxPacketSize); + + csr = usb_read(ep->csr1); + DEBUG("CSR: %x %d\n", csr, csr & USB_IN_CSR1_FIFO_NOT_EMPTY); + + if (!(csr & USB_IN_CSR1_FIFO_NOT_EMPTY)) { + unsigned count; + int is_last, is_short; + + count = write_packet(ep, req, max); + usb_set(USB_IN_CSR1_IN_PKT_RDY, ep->csr1); + + /* last packet is usually short (or a zlp) */ + if (unlikely(count != max)) + is_last = is_short = 1; + else { + if (likely(req->req.length != req->req.actual) + || req->req.zero) + is_last = 0; + else + is_last = 1; + /* interrupt/iso maxpacket may not fill the fifo */ + is_short = unlikely(max < ep_maxpacket(ep)); + } + + DEBUG("%s: wrote %s %d bytes%s%s %d left %p\n", __FUNCTION__, + ep->ep.name, count, + is_last ? "/L" : "", is_short ? "/S" : "", + req->req.length - req->req.actual, req); + + /* requests complete when all IN data is in the FIFO */ + if (is_last) { + done(ep, req, 0); + if (list_empty(&ep->queue)) { + pio_irq_disable(ep_index(ep)); + } + return 1; + } + } else { + DEBUG("Hmm.. %d ep FIFO is not empty!\n", ep_index(ep)); + } + + return 0; +} + +/** Read to request from FIFO (max read == bytes in fifo) + * Return: 0 = still running, 1 = completed, negative = errno + * NOTE: INDEX register must be set for EP + */ +static int read_fifo(struct lh7a40x_ep *ep, struct lh7a40x_request *req) +{ + u32 csr; + u8 *buf; + unsigned bufferspace, count, is_short; + volatile u32 *fifo = (volatile u32 *)ep->fifo; + + /* make sure there's a packet in the FIFO. */ + csr = usb_read(ep->csr1); + if (!(csr & USB_OUT_CSR1_OUT_PKT_RDY)) { + DEBUG("%s: Packet NOT ready!\n", __FUNCTION__); + return -EINVAL; + } + + buf = req->req.buf + req->req.actual; + prefetchw(buf); + bufferspace = req->req.length - req->req.actual; + + /* read all bytes from this packet */ + count = usb_read(USB_OUT_FIFO_WC1); + req->req.actual += min(count, bufferspace); + + is_short = (count < ep->ep.maxpacket); + DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n", + ep->ep.name, csr, count, + is_short ? "/S" : "", req, req->req.actual, req->req.length); + + while (likely(count-- != 0)) { + u8 byte = (u8) (*fifo & 0xff); + + if (unlikely(bufferspace == 0)) { + /* this happens when the driver's buffer + * is smaller than what the host sent. + * discard the extra data. + */ + if (req->req.status != -EOVERFLOW) + printk("%s overflow %d\n", ep->ep.name, count); + req->req.status = -EOVERFLOW; + } else { + *buf++ = byte; + bufferspace--; + } + } + + usb_clear(USB_OUT_CSR1_OUT_PKT_RDY, ep->csr1); + + /* completion */ + if (is_short || req->req.actual == req->req.length) { + done(ep, req, 0); + usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); + + if (list_empty(&ep->queue)) + pio_irq_disable(ep_index(ep)); + return 1; + } + + /* finished that packet. the next one may be waiting... */ + return 0; +} + +/* + * done - retire a request; caller blocked irqs + * INDEX register is preserved to keep same + */ +static void done(struct lh7a40x_ep *ep, struct lh7a40x_request *req, int status) +{ + unsigned int stopped = ep->stopped; + u32 index; + + DEBUG("%s, %p\n", __FUNCTION__, ep); + list_del_init(&req->queue); + + if (likely(req->req.status == -EINPROGRESS)) + req->req.status = status; + else + status = req->req.status; + + if (status && status != -ESHUTDOWN) + DEBUG("complete %s req %p stat %d len %u/%u\n", + ep->ep.name, &req->req, status, + req->req.actual, req->req.length); + + /* don't modify queue heads during completion callback */ + ep->stopped = 1; + /* Read current index (completion may modify it) */ + index = usb_read(USB_INDEX); + + spin_unlock(&ep->dev->lock); + req->req.complete(&ep->ep, &req->req); + spin_lock(&ep->dev->lock); + + /* Restore index */ + usb_set_index(index); + ep->stopped = stopped; +} + +/** Enable EP interrupt */ +static void pio_irq_enable(int ep) +{ + DEBUG("%s: %d\n", __FUNCTION__, ep); + + switch (ep) { + case 1: + usb_set(USB_IN_INT_EP1, USB_IN_INT_EN); + break; + case 2: + usb_set(USB_OUT_INT_EP2, USB_OUT_INT_EN); + break; + case 3: + usb_set(USB_IN_INT_EP3, USB_IN_INT_EN); + break; + default: + DEBUG("Unknown endpoint: %d\n", ep); + break; + } +} + +/** Disable EP interrupt */ +static void pio_irq_disable(int ep) +{ + DEBUG("%s: %d\n", __FUNCTION__, ep); + + switch (ep) { + case 1: + usb_clear(USB_IN_INT_EP1, USB_IN_INT_EN); + break; + case 2: + usb_clear(USB_OUT_INT_EP2, USB_OUT_INT_EN); + break; + case 3: + usb_clear(USB_IN_INT_EP3, USB_IN_INT_EN); + break; + default: + DEBUG("Unknown endpoint: %d\n", ep); + break; + } +} + +/* + * nuke - dequeue ALL requests + */ +void nuke(struct lh7a40x_ep *ep, int status) +{ + struct lh7a40x_request *req; + + DEBUG("%s, %p\n", __FUNCTION__, ep); + + /* Flush FIFO */ + flush(ep); + + /* called with irqs blocked */ + while (!list_empty(&ep->queue)) { + req = list_entry(ep->queue.next, struct lh7a40x_request, queue); + done(ep, req, status); + } + + /* Disable IRQ if EP is enabled (has decriptor) */ + if (ep->desc) + pio_irq_disable(ep_index(ep)); +} + +/* +void nuke_all(struct lh7a40x_udc *dev) +{ + int n; + for(n=0; n<UDC_MAX_ENDPOINTS; n++) { + struct lh7a40x_ep *ep = &dev->ep[n]; + usb_set_index(n); + nuke(ep, 0); + } +}*/ + +/* +static void flush_all(struct lh7a40x_udc *dev) +{ + int n; + for (n = 0; n < UDC_MAX_ENDPOINTS; n++) + { + struct lh7a40x_ep *ep = &dev->ep[n]; + flush(ep); + } +} +*/ + +/** Flush EP + * NOTE: INDEX register must be set before this call + */ +static void flush(struct lh7a40x_ep *ep) +{ + DEBUG("%s, %p\n", __FUNCTION__, ep); + + switch (ep->ep_type) { + case ep_control: + /* check, by implication c.f. 15.1.2.11 */ + break; + + case ep_bulk_in: + case ep_interrupt: + /* if(csr & USB_IN_CSR1_IN_PKT_RDY) */ + usb_set(USB_IN_CSR1_FIFO_FLUSH, ep->csr1); + break; + + case ep_bulk_out: + /* if(csr & USB_OUT_CSR1_OUT_PKT_RDY) */ + usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); + break; + } +} + +/** + * lh7a40x_in_epn - handle IN interrupt + */ +static void lh7a40x_in_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr) +{ + u32 csr; + struct lh7a40x_ep *ep = &dev->ep[ep_idx]; + struct lh7a40x_request *req; + + usb_set_index(ep_idx); + + csr = usb_read(ep->csr1); + DEBUG("%s: %d, csr %x\n", __FUNCTION__, ep_idx, csr); + + if (csr & USB_IN_CSR1_SENT_STALL) { + DEBUG("USB_IN_CSR1_SENT_STALL\n"); + usb_set(USB_IN_CSR1_SENT_STALL /*|USB_IN_CSR1_SEND_STALL */ , + ep->csr1); + return; + } + + if (!ep->desc) { + DEBUG("%s: NO EP DESC\n", __FUNCTION__); + return; + } + + if (list_empty(&ep->queue)) + req = 0; + else + req = list_entry(ep->queue.next, struct lh7a40x_request, queue); + + DEBUG("req: %p\n", req); + + if (!req) + return; + + write_fifo(ep, req); +} + +/* ********************************************************************************************* */ +/* Bulk OUT (recv) + */ + +static void lh7a40x_out_epn(struct lh7a40x_udc *dev, u32 ep_idx, u32 intr) +{ + struct lh7a40x_ep *ep = &dev->ep[ep_idx]; + struct lh7a40x_request *req; + + DEBUG("%s: %d\n", __FUNCTION__, ep_idx); + + usb_set_index(ep_idx); + + if (ep->desc) { + u32 csr; + csr = usb_read(ep->csr1); + + while ((csr = + usb_read(ep-> + csr1)) & (USB_OUT_CSR1_OUT_PKT_RDY | + USB_OUT_CSR1_SENT_STALL)) { + DEBUG("%s: %x\n", __FUNCTION__, csr); + + if (csr & USB_OUT_CSR1_SENT_STALL) { + DEBUG("%s: stall sent, flush fifo\n", + __FUNCTION__); + /* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); */ + flush(ep); + } else if (csr & USB_OUT_CSR1_OUT_PKT_RDY) { + if (list_empty(&ep->queue)) + req = 0; + else + req = + list_entry(ep->queue.next, + struct lh7a40x_request, + queue); + + if (!req) { + printk("%s: NULL REQ %d\n", + __FUNCTION__, ep_idx); + flush(ep); + break; + } else { + read_fifo(ep, req); + } + } + + } + + } else { + /* Throw packet away.. */ + printk("%s: No descriptor?!?\n", __FUNCTION__); + flush(ep); + } +} + +static void stop_activity(struct lh7a40x_udc *dev, + struct usb_gadget_driver *driver) +{ + int i; + + /* don't disconnect drivers more than once */ + if (dev->gadget.speed == USB_SPEED_UNKNOWN) + driver = 0; + dev->gadget.speed = USB_SPEED_UNKNOWN; + + /* prevent new request submissions, kill any outstanding requests */ + for (i = 0; i < UDC_MAX_ENDPOINTS; i++) { + struct lh7a40x_ep *ep = &dev->ep[i]; + ep->stopped = 1; + + usb_set_index(i); + nuke(ep, -ESHUTDOWN); + } + + /* report disconnect; the driver is already quiesced */ + if (driver) { + spin_unlock(&dev->lock); + driver->disconnect(&dev->gadget); + spin_lock(&dev->lock); + } + + /* re-init driver-visible data structures */ + udc_reinit(dev); +} + +/** Handle USB RESET interrupt + */ +static void lh7a40x_reset_intr(struct lh7a40x_udc *dev) +{ +#if 0 /* def CONFIG_ARCH_LH7A404 */ + /* Does not work always... */ + + DEBUG("%s: %d\n", __FUNCTION__, dev->usb_address); + + if (!dev->usb_address) { + /*usb_set(USB_RESET_IO, USB_RESET); + mdelay(5); + usb_clear(USB_RESET_IO, USB_RESET); */ + return; + } + /* Put the USB controller into reset. */ + usb_set(USB_RESET_IO, USB_RESET); + + /* Set Device ID to 0 */ + udc_set_address(dev, 0); + + /* Let PLL2 settle down */ + mdelay(5); + + /* Release the USB controller from reset */ + usb_clear(USB_RESET_IO, USB_RESET); + + /* Re-enable UDC */ + udc_enable(dev); + +#endif + dev->gadget.speed = USB_SPEED_FULL; +} + +/* + * lh7a40x usb client interrupt handler. + */ +static irqreturn_t lh7a40x_udc_irq(int irq, void *_dev, struct pt_regs *r) +{ + struct lh7a40x_udc *dev = _dev; + + DEBUG("\n\n"); + + spin_lock(&dev->lock); + + for (;;) { + u32 intr_in = usb_read(USB_IN_INT); + u32 intr_out = usb_read(USB_OUT_INT); + u32 intr_int = usb_read(USB_INT); + + /* Test also against enable bits.. (lh7a40x errata).. Sigh.. */ + u32 in_en = usb_read(USB_IN_INT_EN); + u32 out_en = usb_read(USB_OUT_INT_EN); + + if (!intr_out && !intr_in && !intr_int) + break; + + DEBUG("%s (on state %s)\n", __FUNCTION__, + state_names[dev->ep0state]); + DEBUG("intr_out = %x\n", intr_out); + DEBUG("intr_in = %x\n", intr_in); + DEBUG("intr_int = %x\n", intr_int); + + if (intr_in) { + usb_write(intr_in, USB_IN_INT); + + if ((intr_in & USB_IN_INT_EP1) + && (in_en & USB_IN_INT_EP1)) { + DEBUG("USB_IN_INT_EP1\n"); + lh7a40x_in_epn(dev, 1, intr_in); + } + if ((intr_in & USB_IN_INT_EP3) + && (in_en & USB_IN_INT_EP3)) { + DEBUG("USB_IN_INT_EP3\n"); + lh7a40x_in_epn(dev, 3, intr_in); + } + if (intr_in & USB_IN_INT_EP0) { + DEBUG("USB_IN_INT_EP0 (control)\n"); + lh7a40x_handle_ep0(dev, intr_in); + } + } + + if (intr_out) { + usb_write(intr_out, USB_OUT_INT); + + if ((intr_out & USB_OUT_INT_EP2) + && (out_en & USB_OUT_INT_EP2)) { + DEBUG("USB_OUT_INT_EP2\n"); + lh7a40x_out_epn(dev, 2, intr_out); + } + } + + if (intr_int) { + usb_write(intr_int, USB_INT); + + if (intr_int & USB_INT_RESET_INT) { + lh7a40x_reset_intr(dev); + } + + if (intr_int & USB_INT_RESUME_INT) { + DEBUG("USB resume\n"); + + if (dev->gadget.speed != USB_SPEED_UNKNOWN + && dev->driver + && dev->driver->resume + && is_usb_connected()) { + dev->driver->resume(&dev->gadget); + } + } + + if (intr_int & USB_INT_SUSPEND_INT) { + DEBUG("USB suspend%s\n", + is_usb_connected()? "" : "+disconnect"); + if (!is_usb_connected()) { + stop_activity(dev, dev->driver); + } else if (dev->gadget.speed != + USB_SPEED_UNKNOWN && dev->driver + && dev->driver->suspend) { + dev->driver->suspend(&dev->gadget); + } + } + + } + } + + spin_unlock(&dev->lock); + + return IRQ_HANDLED; +} + +static int lh7a40x_ep_enable(struct usb_ep *_ep, + const struct usb_endpoint_descriptor *desc) +{ + struct lh7a40x_ep *ep; + struct lh7a40x_udc *dev; + unsigned long flags; + + DEBUG("%s, %p\n", __FUNCTION__, _ep); + + ep = container_of(_ep, struct lh7a40x_ep, ep); + if (!_ep || !desc || ep->desc || _ep->name == ep0name + || desc->bDescriptorType != USB_DT_ENDPOINT + || ep->bEndpointAddress != desc->bEndpointAddress + || ep_maxpacket(ep) < le16_to_cpu(desc->wMaxPacketSize)) { + DEBUG("%s, bad ep or descriptor\n", __FUNCTION__); + return -EINVAL; + } + + /* xfer types must match, except that interrupt ~= bulk */ + if (ep->bmAttributes != desc->bmAttributes + && ep->bmAttributes != USB_ENDPOINT_XFER_BULK + && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { + DEBUG("%s, %s type mismatch\n", __FUNCTION__, _ep->name); + return -EINVAL; + } + + /* hardware _could_ do smaller, but driver doesn't */ + if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK + && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(ep)) + || !desc->wMaxPacketSize) { + DEBUG("%s, bad %s maxpacket\n", __FUNCTION__, _ep->name); + return -ERANGE; + } + + dev = ep->dev; + if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { + DEBUG("%s, bogus device state\n", __FUNCTION__); + return -ESHUTDOWN; + } + + spin_lock_irqsave(&ep->dev->lock, flags); + + ep->stopped = 0; + ep->desc = desc; + ep->pio_irqs = 0; + ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize); + + /* Reset halt state (does flush) */ + lh7a40x_set_halt(_ep, 0); + + spin_unlock_irqrestore(&ep->dev->lock, flags); + + DEBUG("%s: enabled %s\n", __FUNCTION__, _ep->name); + return 0; +} + +/** Disable EP + * NOTE: Sets INDEX register + */ +static int lh7a40x_ep_disable(struct usb_ep *_ep) +{ + struct lh7a40x_ep *ep; + unsigned long flags; + + DEBUG("%s, %p\n", __FUNCTION__, _ep); + + ep = container_of(_ep, struct lh7a40x_ep, ep); + if (!_ep || !ep->desc) { + DEBUG("%s, %s not enabled\n", __FUNCTION__, + _ep ? ep->ep.name : NULL); + return -EINVAL; + } + + spin_lock_irqsave(&ep->dev->lock, flags); + + usb_set_index(ep_index(ep)); + + /* Nuke all pending requests (does flush) */ + nuke(ep, -ESHUTDOWN); + + /* Disable ep IRQ */ + pio_irq_disable(ep_index(ep)); + + ep->desc = 0; + ep->stopped = 1; + + spin_unlock_irqrestore(&ep->dev->lock, flags); + + DEBUG("%s: disabled %s\n", __FUNCTION__, _ep->name); + return 0; +} + +static struct usb_request *lh7a40x_alloc_request(struct usb_ep *ep, + int gfp_flags) +{ + struct lh7a40x_request *req; + + DEBUG("%s, %p\n", __FUNCTION__, ep); + + req = kmalloc(sizeof *req, gfp_flags); + if (!req) + return 0; + + memset(req, 0, sizeof *req); + INIT_LIST_HEAD(&req->queue); + + return &req->req; +} + +static void lh7a40x_free_request(struct usb_ep *ep, struct usb_request *_req) +{ + struct lh7a40x_request *req; + + DEBUG("%s, %p\n", __FUNCTION__, ep); + + req = container_of(_req, struct lh7a40x_request, req); + WARN_ON(!list_empty(&req->queue)); + kfree(req); +} + +static void *lh7a40x_alloc_buffer(struct usb_ep *ep, unsigned bytes, + dma_addr_t * dma, int gfp_flags) +{ + char *retval; + + DEBUG("%s (%p, %d, %d)\n", __FUNCTION__, ep, bytes, gfp_flags); + + retval = kmalloc(bytes, gfp_flags & ~(__GFP_DMA | __GFP_HIGHMEM)); + if (retval) + *dma = virt_to_bus(retval); + return retval; +} + +static void lh7a40x_free_buffer(struct usb_ep *ep, void *buf, dma_addr_t dma, + unsigned bytes) +{ + DEBUG("%s, %p\n", __FUNCTION__, ep); + kfree(buf); +} + +/** Queue one request + * Kickstart transfer if needed + * NOTE: Sets INDEX register + */ +static int lh7a40x_queue(struct usb_ep *_ep, struct usb_request *_req, + int gfp_flags) +{ + struct lh7a40x_request *req; + struct lh7a40x_ep *ep; + struct lh7a40x_udc *dev; + unsigned long flags; + + DEBUG("\n\n\n%s, %p\n", __FUNCTION__, _ep); + + req = container_of(_req, struct lh7a40x_request, req); + if (unlikely + (!_req || !_req->complete || !_req->buf + || !list_empty(&req->queue))) { + DEBUG("%s, bad params\n", __FUNCTION__); + return -EINVAL; + } + + ep = container_of(_ep, struct lh7a40x_ep, ep); + if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) { + DEBUG("%s, bad ep\n", __FUNCTION__); + return -EINVAL; + } + + dev = ep->dev; + if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { + DEBUG("%s, bogus device state %p\n", __FUNCTION__, dev->driver); + return -ESHUTDOWN; + } + + DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length, + _req->buf); + + spin_lock_irqsave(&dev->lock, flags); + + _req->status = -EINPROGRESS; + _req->actual = 0; + + /* kickstart this i/o queue? */ + DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue), + ep->stopped); + if (list_empty(&ep->queue) && likely(!ep->stopped)) { + u32 csr; + + if (unlikely(ep_index(ep) == 0)) { + /* EP0 */ + list_add_tail(&req->queue, &ep->queue); + lh7a40x_ep0_kick(dev, ep); + req = 0; + } else if (ep_is_in(ep)) { + /* EP1 & EP3 */ + usb_set_index(ep_index(ep)); + csr = usb_read(ep->csr1); + pio_irq_enable(ep_index(ep)); + if ((csr & USB_IN_CSR1_FIFO_NOT_EMPTY) == 0) { + if (write_fifo(ep, req) == 1) + req = 0; + } + } else { + /* EP2 */ + usb_set_index(ep_index(ep)); + csr = usb_read(ep->csr1); + pio_irq_enable(ep_index(ep)); + if (!(csr & USB_OUT_CSR1_FIFO_FULL)) { + if (read_fifo(ep, req) == 1) + req = 0; + } + } + } + + /* pio or dma irq handler advances the queue. */ + if (likely(req != 0)) + list_add_tail(&req->queue, &ep->queue); + + spin_unlock_irqrestore(&dev->lock, flags); + + return 0; +} + +/* dequeue JUST ONE request */ +static int lh7a40x_dequeue(struct usb_ep *_ep, struct usb_request *_req) +{ + struct lh7a40x_ep *ep; + struct lh7a40x_request *req; + unsigned long flags; + + DEBUG("%s, %p\n", __FUNCTION__, _ep); + + ep = container_of(_ep, struct lh7a40x_ep, ep); + if (!_ep || ep->ep.name == ep0name) |