diff options
| author | Andrzej Pietrasiewicz <andrzej.p@samsung.com> | 2014-07-15 13:09:45 +0200 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-07-16 19:15:28 +0200 |
| commit | 90fccb529d241b55829701cfb9eb3086570f38b8 (patch) | |
| tree | 4e788b13b8c35bc5c9d24597479cda82d503bf7c /drivers/usb/gadget/amd5536udc.c | |
| parent | usb: gadget: Gadget directory cleanup - group legacy gadgets (diff) | |
| download | linux-90fccb529d241b55829701cfb9eb3086570f38b8.tar.xz linux-90fccb529d241b55829701cfb9eb3086570f38b8.zip | |
usb: gadget: Gadget directory cleanup - group UDC drivers
The drivers/usb/gadget directory contains many files.
Files which are related can be distributed into separate directories.
This patch moves the UDC drivers into a separate directory.
Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/amd5536udc.c')
| -rw-r--r-- | drivers/usb/gadget/amd5536udc.c | 3366 |
1 files changed, 0 insertions, 3366 deletions
diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c deleted file mode 100644 index 41b062eb4de0..000000000000 --- a/drivers/usb/gadget/amd5536udc.c +++ /dev/null @@ -1,3366 +0,0 @@ -/* - * amd5536.c -- AMD 5536 UDC high/full speed USB device controller - * - * Copyright (C) 2005-2007 AMD (http://www.amd.com) - * Author: Thomas Dahlmann - * - * 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. - */ - -/* - * The AMD5536 UDC is part of the x86 southbridge AMD Geode CS5536. - * It is a USB Highspeed DMA capable USB device controller. Beside ep0 it - * provides 4 IN and 4 OUT endpoints (bulk or interrupt type). - * - * Make sure that UDC is assigned to port 4 by BIOS settings (port can also - * be used as host port) and UOC bits PAD_EN and APU are set (should be done - * by BIOS init). - * - * UDC DMA requires 32-bit aligned buffers so DMA with gadget ether does not - * work without updating NET_IP_ALIGN. Or PIO mode (module param "use_dma=0") - * can be used with gadget ether. - */ - -/* debug control */ -/* #define UDC_VERBOSE */ - -/* Driver strings */ -#define UDC_MOD_DESCRIPTION "AMD 5536 UDC - USB Device Controller" -#define UDC_DRIVER_VERSION_STRING "01.00.0206" - -/* system */ -#include <linux/module.h> -#include <linux/pci.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/timer.h> -#include <linux/list.h> -#include <linux/interrupt.h> -#include <linux/ioctl.h> -#include <linux/fs.h> -#include <linux/dmapool.h> -#include <linux/moduleparam.h> -#include <linux/device.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/prefetch.h> - -#include <asm/byteorder.h> -#include <asm/unaligned.h> - -/* gadget stack */ -#include <linux/usb/ch9.h> -#include <linux/usb/gadget.h> - -/* udc specific */ -#include "amd5536udc.h" - - -static void udc_tasklet_disconnect(unsigned long); -static void empty_req_queue(struct udc_ep *); -static int udc_probe(struct udc *dev); -static void udc_basic_init(struct udc *dev); -static void udc_setup_endpoints(struct udc *dev); -static void udc_soft_reset(struct udc *dev); -static struct udc_request *udc_alloc_bna_dummy(struct udc_ep *ep); -static void udc_free_request(struct usb_ep *usbep, struct usb_request *usbreq); -static int udc_free_dma_chain(struct udc *dev, struct udc_request *req); -static int udc_create_dma_chain(struct udc_ep *ep, struct udc_request *req, - unsigned long buf_len, gfp_t gfp_flags); -static int udc_remote_wakeup(struct udc *dev); -static int udc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id); -static void udc_pci_remove(struct pci_dev *pdev); - -/* description */ -static const char mod_desc[] = UDC_MOD_DESCRIPTION; -static const char name[] = "amd5536udc"; - -/* structure to hold endpoint function pointers */ -static const struct usb_ep_ops udc_ep_ops; - -/* received setup data */ -static union udc_setup_data setup_data; - -/* pointer to device object */ -static struct udc *udc; - -/* irq spin lock for soft reset */ -static DEFINE_SPINLOCK(udc_irq_spinlock); -/* stall spin lock */ -static DEFINE_SPINLOCK(udc_stall_spinlock); - -/* -* slave mode: pending bytes in rx fifo after nyet, -* used if EPIN irq came but no req was available -*/ -static unsigned int udc_rxfifo_pending; - -/* count soft resets after suspend to avoid loop */ -static int soft_reset_occured; -static int soft_reset_after_usbreset_occured; - -/* timer */ -static struct timer_list udc_timer; -static int stop_timer; - -/* set_rde -- Is used to control enabling of RX DMA. Problem is - * that UDC has only one bit (RDE) to enable/disable RX DMA for - * all OUT endpoints. So we have to handle race conditions like - * when OUT data reaches the fifo but no request was queued yet. - * This cannot be solved by letting the RX DMA disabled until a - * request gets queued because there may be other OUT packets - * in the FIFO (important for not blocking control traffic). - * The value of set_rde controls the correspondig timer. - * - * set_rde -1 == not used, means it is alloed to be set to 0 or 1 - * set_rde 0 == do not touch RDE, do no start the RDE timer - * set_rde 1 == timer function will look whether FIFO has data - * set_rde 2 == set by timer function to enable RX DMA on next call - */ -static int set_rde = -1; - -static DECLARE_COMPLETION(on_exit); -static struct timer_list udc_pollstall_timer; -static int stop_pollstall_timer; -static DECLARE_COMPLETION(on_pollstall_exit); - -/* tasklet for usb disconnect */ -static DECLARE_TASKLET(disconnect_tasklet, udc_tasklet_disconnect, - (unsigned long) &udc); - - -/* endpoint names used for print */ -static const char ep0_string[] = "ep0in"; -static const char *const ep_string[] = { - ep0_string, - "ep1in-int", "ep2in-bulk", "ep3in-bulk", "ep4in-bulk", "ep5in-bulk", - "ep6in-bulk", "ep7in-bulk", "ep8in-bulk", "ep9in-bulk", "ep10in-bulk", - "ep11in-bulk", "ep12in-bulk", "ep13in-bulk", "ep14in-bulk", - "ep15in-bulk", "ep0out", "ep1out-bulk", "ep2out-bulk", "ep3out-bulk", - "ep4out-bulk", "ep5out-bulk", "ep6out-bulk", "ep7out-bulk", - "ep8out-bulk", "ep9out-bulk", "ep10out-bulk", "ep11out-bulk", - "ep12out-bulk", "ep13out-bulk", "ep14out-bulk", "ep15out-bulk" -}; - -/* DMA usage flag */ -static bool use_dma = 1; -/* packet per buffer dma */ -static bool use_dma_ppb = 1; -/* with per descr. update */ -static bool use_dma_ppb_du; -/* buffer fill mode */ -static int use_dma_bufferfill_mode; -/* full speed only mode */ -static bool use_fullspeed; -/* tx buffer size for high speed */ -static unsigned long hs_tx_buf = UDC_EPIN_BUFF_SIZE; - -/* module parameters */ -module_param(use_dma, bool, S_IRUGO); -MODULE_PARM_DESC(use_dma, "true for DMA"); -module_param(use_dma_ppb, bool, S_IRUGO); -MODULE_PARM_DESC(use_dma_ppb, "true for DMA in packet per buffer mode"); -module_param(use_dma_ppb_du, bool, S_IRUGO); -MODULE_PARM_DESC(use_dma_ppb_du, - "true for DMA in packet per buffer mode with descriptor update"); -module_param(use_fullspeed, bool, S_IRUGO); -MODULE_PARM_DESC(use_fullspeed, "true for fullspeed only"); - -/*---------------------------------------------------------------------------*/ -/* Prints UDC device registers and endpoint irq registers */ -static void print_regs(struct udc *dev) -{ - DBG(dev, "------- Device registers -------\n"); - DBG(dev, "dev config = %08x\n", readl(&dev->regs->cfg)); - DBG(dev, "dev control = %08x\n", readl(&dev->regs->ctl)); - DBG(dev, "dev status = %08x\n", readl(&dev->regs->sts)); - DBG(dev, "\n"); - DBG(dev, "dev int's = %08x\n", readl(&dev->regs->irqsts)); - DBG(dev, "dev intmask = %08x\n", readl(&dev->regs->irqmsk)); - DBG(dev, "\n"); - DBG(dev, "dev ep int's = %08x\n", readl(&dev->regs->ep_irqsts)); - DBG(dev, "dev ep intmask = %08x\n", readl(&dev->regs->ep_irqmsk)); - DBG(dev, "\n"); - DBG(dev, "USE DMA = %d\n", use_dma); - if (use_dma && use_dma_ppb && !use_dma_ppb_du) { - DBG(dev, "DMA mode = PPBNDU (packet per buffer " - "WITHOUT desc. update)\n"); - dev_info(&dev->pdev->dev, "DMA mode (%s)\n", "PPBNDU"); - } else if (use_dma && use_dma_ppb && use_dma_ppb_du) { - DBG(dev, "DMA mode = PPBDU (packet per buffer " - "WITH desc. update)\n"); - dev_info(&dev->pdev->dev, "DMA mode (%s)\n", "PPBDU"); - } - if (use_dma && use_dma_bufferfill_mode) { - DBG(dev, "DMA mode = BF (buffer fill mode)\n"); - dev_info(&dev->pdev->dev, "DMA mode (%s)\n", "BF"); - } - if (!use_dma) - dev_info(&dev->pdev->dev, "FIFO mode\n"); - DBG(dev, "-------------------------------------------------------\n"); -} - -/* Masks unused interrupts */ -static int udc_mask_unused_interrupts(struct udc *dev) -{ - u32 tmp; - - /* mask all dev interrupts */ - tmp = AMD_BIT(UDC_DEVINT_SVC) | - AMD_BIT(UDC_DEVINT_ENUM) | - AMD_BIT(UDC_DEVINT_US) | - AMD_BIT(UDC_DEVINT_UR) | - AMD_BIT(UDC_DEVINT_ES) | - AMD_BIT(UDC_DEVINT_SI) | - AMD_BIT(UDC_DEVINT_SOF)| - AMD_BIT(UDC_DEVINT_SC); - writel(tmp, &dev->regs->irqmsk); - - /* mask all ep interrupts */ - writel(UDC_EPINT_MSK_DISABLE_ALL, &dev->regs->ep_irqmsk); - - return 0; -} - -/* Enables endpoint 0 interrupts */ -static int udc_enable_ep0_interrupts(struct udc *dev) -{ - u32 tmp; - - DBG(dev, "udc_enable_ep0_interrupts()\n"); - - /* read irq mask */ - tmp = readl(&dev->regs->ep_irqmsk); - /* enable ep0 irq's */ - tmp &= AMD_UNMASK_BIT(UDC_EPINT_IN_EP0) - & AMD_UNMASK_BIT(UDC_EPINT_OUT_EP0); - writel(tmp, &dev->regs->ep_irqmsk); - - return 0; -} - -/* Enables device interrupts for SET_INTF and SET_CONFIG */ -static int udc_enable_dev_setup_interrupts(struct udc *dev) -{ - u32 tmp; - - DBG(dev, "enable device interrupts for setup data\n"); - - /* read irq mask */ - tmp = readl(&dev->regs->irqmsk); - - /* enable SET_INTERFACE, SET_CONFIG and other needed irq's */ - tmp &= AMD_UNMASK_BIT(UDC_DEVINT_SI) - & AMD_UNMASK_BIT(UDC_DEVINT_SC) - & AMD_UNMASK_BIT(UDC_DEVINT_UR) - & AMD_UNMASK_BIT(UDC_DEVINT_SVC) - & AMD_UNMASK_BIT(UDC_DEVINT_ENUM); - writel(tmp, &dev->regs->irqmsk); - - return 0; -} - -/* Calculates fifo start of endpoint based on preceding endpoints */ -static int udc_set_txfifo_addr(struct udc_ep *ep) -{ - struct udc *dev; - u32 tmp; - int i; - - if (!ep || !(ep->in)) - return -EINVAL; - - dev = ep->dev; - ep->txfifo = dev->txfifo; - - /* traverse ep's */ - for (i = 0; i < ep->num; i++) { - if (dev->ep[i].regs) { - /* read fifo size */ - tmp = readl(&dev->ep[i].regs->bufin_framenum); - tmp = AMD_GETBITS(tmp, UDC_EPIN_BUFF_SIZE); - ep->txfifo += tmp; - } - } - return 0; -} - -/* CNAK pending field: bit0 = ep0in, bit16 = ep0out */ -static u32 cnak_pending; - -static void UDC_QUEUE_CNAK(struct udc_ep *ep, unsigned num) -{ - if (readl(&ep->regs->ctl) & AMD_BIT(UDC_EPCTL_NAK)) { - DBG(ep->dev, "NAK could not be cleared for ep%d\n", num); - cnak_pending |= 1 << (num); - ep->naking = 1; - } else - cnak_pending = cnak_pending & (~(1 << (num))); -} - - -/* Enables endpoint, is called by gadget driver */ -static int -udc_ep_enable(struct usb_ep *usbep, const struct usb_endpoint_descriptor *desc) -{ - struct udc_ep *ep; - struct udc *dev; - u32 tmp; - unsigned long iflags; - u8 udc_csr_epix; - unsigned maxpacket; - - if (!usbep - || usbep->name == ep0_string - || !desc - || desc->bDescriptorType != USB_DT_ENDPOINT) - return -EINVAL; - - ep = container_of(usbep, struct udc_ep, ep); - dev = ep->dev; - - DBG(dev, "udc_ep_enable() ep %d\n", ep->num); - - if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) - return -ESHUTDOWN; - - spin_lock_irqsave(&dev->lock, iflags); - ep->ep.desc = desc; - - ep->halted = 0; - - /* set traffic type */ - tmp = readl(&dev->ep[ep->num].regs->ctl); - tmp = AMD_ADDBITS(tmp, desc->bmAttributes, UDC_EPCTL_ET); - writel(tmp, &dev->ep[ep->num].regs->ctl); - - /* set max packet size */ - maxpacket = usb_endpoint_maxp(desc); - tmp = readl(&dev->ep[ep->num].regs->bufout_maxpkt); - tmp = AMD_ADDBITS(tmp, maxpacket, UDC_EP_MAX_PKT_SIZE); - ep->ep.maxpacket = maxpacket; - writel(tmp, &dev->ep[ep->num].regs->bufout_maxpkt); - - /* IN ep */ - if (ep->in) { - - /* ep ix in UDC CSR register space */ - udc_csr_epix = ep->num; - - /* set buffer size (tx fifo entries) */ - tmp = readl(&dev->ep[ep->num].regs->bufin_framenum); - /* double buffering: fifo size = 2 x max packet size */ - tmp = AMD_ADDBITS( - tmp, - maxpacket * UDC_EPIN_BUFF_SIZE_MULT - / UDC_DWORD_BYTES, - UDC_EPIN_BUFF_SIZE); - writel(tmp, &dev->ep[ep->num].regs->bufin_framenum); - - /* calc. tx fifo base addr */ - udc_set_txfifo_addr(ep); - - /* flush fifo */ - tmp = readl(&ep->regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_F); - writel(tmp, &ep->regs->ctl); - - /* OUT ep */ - } else { - /* ep ix in UDC CSR register space */ - udc_csr_epix = ep->num - UDC_CSR_EP_OUT_IX_OFS; - - /* set max packet size UDC CSR */ - tmp = readl(&dev->csr->ne[ep->num - UDC_CSR_EP_OUT_IX_OFS]); - tmp = AMD_ADDBITS(tmp, maxpacket, - UDC_CSR_NE_MAX_PKT); - writel(tmp, &dev->csr->ne[ep->num - UDC_CSR_EP_OUT_IX_OFS]); - - if (use_dma && !ep->in) { - /* alloc and init BNA dummy request */ - ep->bna_dummy_req = udc_alloc_bna_dummy(ep); - ep->bna_occurred = 0; - } - - if (ep->num != UDC_EP0OUT_IX) - dev->data_ep_enabled = 1; - } - - /* set ep values */ - tmp = readl(&dev->csr->ne[udc_csr_epix]); - /* max packet */ - tmp = AMD_ADDBITS(tmp, maxpacket, UDC_CSR_NE_MAX_PKT); - /* ep number */ - tmp = AMD_ADDBITS(tmp, desc->bEndpointAddress, UDC_CSR_NE_NUM); - /* ep direction */ - tmp = AMD_ADDBITS(tmp, ep->in, UDC_CSR_NE_DIR); - /* ep type */ - tmp = AMD_ADDBITS(tmp, desc->bmAttributes, UDC_CSR_NE_TYPE); - /* ep config */ - tmp = AMD_ADDBITS(tmp, ep->dev->cur_config, UDC_CSR_NE_CFG); - /* ep interface */ - tmp = AMD_ADDBITS(tmp, ep->dev->cur_intf, UDC_CSR_NE_INTF); - /* ep alt */ - tmp = AMD_ADDBITS(tmp, ep->dev->cur_alt, UDC_CSR_NE_ALT); - /* write reg */ - writel(tmp, &dev->csr->ne[udc_csr_epix]); - - /* enable ep irq */ - tmp = readl(&dev->regs->ep_irqmsk); - tmp &= AMD_UNMASK_BIT(ep->num); - writel(tmp, &dev->regs->ep_irqmsk); - - /* - * clear NAK by writing CNAK - * avoid BNA for OUT DMA, don't clear NAK until DMA desc. written - */ - if (!use_dma || ep->in) { - tmp = readl(&ep->regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &ep->regs->ctl); - ep->naking = 0; - UDC_QUEUE_CNAK(ep, ep->num); - } - tmp = desc->bEndpointAddress; - DBG(dev, "%s enabled\n", usbep->name); - - spin_unlock_irqrestore(&dev->lock, iflags); - return 0; -} - -/* Resets endpoint */ -static void ep_init(struct udc_regs __iomem *regs, struct udc_ep *ep) -{ - u32 tmp; - - VDBG(ep->dev, "ep-%d reset\n", ep->num); - ep->ep.desc = NULL; - ep->ep.ops = &udc_ep_ops; - INIT_LIST_HEAD(&ep->queue); - - usb_ep_set_maxpacket_limit(&ep->ep,(u16) ~0); - /* set NAK */ - tmp = readl(&ep->regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_SNAK); - writel(tmp, &ep->regs->ctl); - ep->naking = 1; - - /* disable interrupt */ - tmp = readl(®s->ep_irqmsk); - tmp |= AMD_BIT(ep->num); - writel(tmp, ®s->ep_irqmsk); - - if (ep->in) { - /* unset P and IN bit of potential former DMA */ - tmp = readl(&ep->regs->ctl); - tmp &= AMD_UNMASK_BIT(UDC_EPCTL_P); - writel(tmp, &ep->regs->ctl); - - tmp = readl(&ep->regs->sts); - tmp |= AMD_BIT(UDC_EPSTS_IN); - writel(tmp, &ep->regs->sts); - - /* flush the fifo */ - tmp = readl(&ep->regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_F); - writel(tmp, &ep->regs->ctl); - - } - /* reset desc pointer */ - writel(0, &ep->regs->desptr); -} - -/* Disables endpoint, is called by gadget driver */ -static int udc_ep_disable(struct usb_ep *usbep) -{ - struct udc_ep *ep = NULL; - unsigned long iflags; - - if (!usbep) - return -EINVAL; - - ep = container_of(usbep, struct udc_ep, ep); - if (usbep->name == ep0_string || !ep->ep.desc) - return -EINVAL; - - DBG(ep->dev, "Disable ep-%d\n", ep->num); - - spin_lock_irqsave(&ep->dev->lock, iflags); - udc_free_request(&ep->ep, &ep->bna_dummy_req->req); - empty_req_queue(ep); - ep_init(ep->dev->regs, ep); - spin_unlock_irqrestore(&ep->dev->lock, iflags); - - return 0; -} - -/* Allocates request packet, called by gadget driver */ -static struct usb_request * -udc_alloc_request(struct usb_ep *usbep, gfp_t gfp) -{ - struct udc_request *req; - struct udc_data_dma *dma_desc; - struct udc_ep *ep; - - if (!usbep) - return NULL; - - ep = container_of(usbep, struct udc_ep, ep); - - VDBG(ep->dev, "udc_alloc_req(): ep%d\n", ep->num); - req = kzalloc(sizeof(struct udc_request), gfp); - if (!req) - return NULL; - - req->req.dma = DMA_DONT_USE; - INIT_LIST_HEAD(&req->queue); - - if (ep->dma) { - /* ep0 in requests are allocated from data pool here */ - dma_desc = pci_pool_alloc(ep->dev->data_requests, gfp, - &req->td_phys); - if (!dma_desc) { - kfree(req); - return NULL; - } - - VDBG(ep->dev, "udc_alloc_req: req = %p dma_desc = %p, " - "td_phys = %lx\n", - req, dma_desc, - (unsigned long)req->td_phys); - /* prevent from using desc. - set HOST BUSY */ - dma_desc->status = AMD_ADDBITS(dma_desc->status, - UDC_DMA_STP_STS_BS_HOST_BUSY, - UDC_DMA_STP_STS_BS); - dma_desc->bufptr = cpu_to_le32(DMA_DONT_USE); - req->td_data = dma_desc; - req->td_data_last = NULL; - req->chain_len = 1; - } - - return &req->req; -} - -/* Frees request packet, called by gadget driver */ -static void -udc_free_request(struct usb_ep *usbep, struct usb_request *usbreq) -{ - struct udc_ep *ep; - struct udc_request *req; - - if (!usbep || !usbreq) - return; - - ep = container_of(usbep, struct udc_ep, ep); - req = container_of(usbreq, struct udc_request, req); - VDBG(ep->dev, "free_req req=%p\n", req); - BUG_ON(!list_empty(&req->queue)); - if (req->td_data) { - VDBG(ep->dev, "req->td_data=%p\n", req->td_data); - - /* free dma chain if created */ - if (req->chain_len > 1) - udc_free_dma_chain(ep->dev, req); - - pci_pool_free(ep->dev->data_requests, req->td_data, - req->td_phys); - } - kfree(req); -} - -/* Init BNA dummy descriptor for HOST BUSY and pointing to itself */ -static void udc_init_bna_dummy(struct udc_request *req) -{ - if (req) { - /* set last bit */ - req->td_data->status |= AMD_BIT(UDC_DMA_IN_STS_L); - /* set next pointer to itself */ - req->td_data->next = req->td_phys; - /* set HOST BUSY */ - req->td_data->status - = AMD_ADDBITS(req->td_data->status, - UDC_DMA_STP_STS_BS_DMA_DONE, - UDC_DMA_STP_STS_BS); -#ifdef UDC_VERBOSE - pr_debug("bna desc = %p, sts = %08x\n", - req->td_data, req->td_data->status); -#endif - } -} - -/* Allocate BNA dummy descriptor */ -static struct udc_request *udc_alloc_bna_dummy(struct udc_ep *ep) -{ - struct udc_request *req = NULL; - struct usb_request *_req = NULL; - - /* alloc the dummy request */ - _req = udc_alloc_request(&ep->ep, GFP_ATOMIC); - if (_req) { - req = container_of(_req, struct udc_request, req); - ep->bna_dummy_req = req; - udc_init_bna_dummy(req); - } - return req; -} - -/* Write data to TX fifo for IN packets */ -static void -udc_txfifo_write(struct udc_ep *ep, struct usb_request *req) -{ - u8 *req_buf; - u32 *buf; - int i, j; - unsigned bytes = 0; - unsigned remaining = 0; - - if (!req || !ep) - return; - - req_buf = req->buf + req->actual; - prefetch(req_buf); - remaining = req->length - req->actual; - - buf = (u32 *) req_buf; - - bytes = ep->ep.maxpacket; - if (bytes > remaining) - bytes = remaining; - - /* dwords first */ - for (i = 0; i < bytes / UDC_DWORD_BYTES; i++) - writel(*(buf + i), ep->txfifo); - - /* remaining bytes must be written by byte access */ - for (j = 0; j < bytes % UDC_DWORD_BYTES; j++) { - writeb((u8)(*(buf + i) >> (j << UDC_BITS_PER_BYTE_SHIFT)), - ep->txfifo); - } - - /* dummy write confirm */ - writel(0, &ep->regs->confirm); -} - -/* Read dwords from RX fifo for OUT transfers */ -static int udc_rxfifo_read_dwords(struct udc *dev, u32 *buf, int dwords) -{ - int i; - - VDBG(dev, "udc_read_dwords(): %d dwords\n", dwords); - - for (i = 0; i < dwords; i++) - *(buf + i) = readl(dev->rxfifo); - return 0; -} - -/* Read bytes from RX fifo for OUT transfers */ -static int udc_rxfifo_read_bytes(struct udc *dev, u8 *buf, int bytes) -{ - int i, j; - u32 tmp; - - VDBG(dev, "udc_read_bytes(): %d bytes\n", bytes); - - /* dwords first */ - for (i = 0; i < bytes / UDC_DWORD_BYTES; i++) - *((u32 *)(buf + (i<<2))) = readl(dev->rxfifo); - - /* remaining bytes must be read by byte access */ - if (bytes % UDC_DWORD_BYTES) { - tmp = readl(dev->rxfifo); - for (j = 0; j < bytes % UDC_DWORD_BYTES; j++) { - *(buf + (i<<2) + j) = (u8)(tmp & UDC_BYTE_MASK); - tmp = tmp >> UDC_BITS_PER_BYTE; - } - } - - return 0; -} - -/* Read data from RX fifo for OUT transfers */ -static int -udc_rxfifo_read(struct udc_ep *ep, struct udc_request *req) -{ - u8 *buf; - unsigned buf_space; - unsigned bytes = 0; - unsigned finished = 0; - - /* received number bytes */ - bytes = readl(&ep->regs->sts); - bytes = AMD_GETBITS(bytes, UDC_EPSTS_RX_PKT_SIZE); - - buf_space = req->req.length - req->req.actual; - buf = req->req.buf + req->req.actual; - if (bytes > buf_space) { - if ((buf_space % ep->ep.maxpacket) != 0) { - DBG(ep->dev, - "%s: rx %d bytes, rx-buf space = %d bytesn\n", - ep->ep.name, bytes, buf_space); - req->req.status = -EOVERFLOW; - } - bytes = buf_space; - } - req->req.actual += bytes; - - /* last packet ? */ - if (((bytes % ep->ep.maxpacket) != 0) || (!bytes) - || ((req->req.actual == req->req.length) && !req->req.zero)) - finished = 1; - - /* read rx fifo bytes */ - VDBG(ep->dev, "ep %s: rxfifo read %d bytes\n", ep->ep.name, bytes); - udc_rxfifo_read_bytes(ep->dev, buf, bytes); - - return finished; -} - -/* create/re-init a DMA descriptor or a DMA descriptor chain */ -static int prep_dma(struct udc_ep *ep, struct udc_request *req, gfp_t gfp) -{ - int retval = 0; - u32 tmp; - - VDBG(ep->dev, "prep_dma\n"); - VDBG(ep->dev, "prep_dma ep%d req->td_data=%p\n", - ep->num, req->td_data); - - /* set buffer pointer */ - req->td_data->bufptr = req->req.dma; - - /* set last bit */ - req->td_data->status |= AMD_BIT(UDC_DMA_IN_STS_L); - - /* build/re-init dma chain if maxpkt scatter mode, not for EP0 */ - if (use_dma_ppb) { - - retval = udc_create_dma_chain(ep, req, ep->ep.maxpacket, gfp); - if (retval != 0) { - if (retval == -ENOMEM) - DBG(ep->dev, "Out of DMA memory\n"); - return retval; - } - if (ep->in) { - if (req->req.length == ep->ep.maxpacket) { - /* write tx bytes */ - req->td_data->status = - AMD_ADDBITS(req->td_data->status, - ep->ep.maxpacket, - UDC_DMA_IN_STS_TXBYTES); - - } - } - - } - - if (ep->in) { - VDBG(ep->dev, "IN: use_dma_ppb=%d req->req.len=%d " - "maxpacket=%d ep%d\n", - use_dma_ppb, req->req.length, - ep->ep.maxpacket, ep->num); - /* - * if bytes < max packet then tx bytes must - * be written in packet per buffer mode - */ - if (!use_dma_ppb || req->req.length < ep->ep.maxpacket - || ep->num == UDC_EP0OUT_IX - || ep->num == UDC_EP0IN_IX) { - /* write tx bytes */ - req->td_data->status = - AMD_ADDBITS(req->td_data->status, - req->req.length, - UDC_DMA_IN_STS_TXBYTES); - /* reset frame num */ - req->td_data->status = - AMD_ADDBITS(req->td_data->status, - 0, - UDC_DMA_IN_STS_FRAMENUM); - } - /* set HOST BUSY */ - req->td_data->status = - AMD_ADDBITS(req->td_data->status, - UDC_DMA_STP_STS_BS_HOST_BUSY, - UDC_DMA_STP_STS_BS); - } else { - VDBG(ep->dev, "OUT set host ready\n"); - /* set HOST READY */ - req->td_data->status = - AMD_ADDBITS(req->td_data->status, - UDC_DMA_STP_STS_BS_HOST_READY, - UDC_DMA_STP_STS_BS); - - - /* clear NAK by writing CNAK */ - if (ep->naking) { - tmp = readl(&ep->regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &ep->regs->ctl); - ep->naking = 0; - UDC_QUEUE_CNAK(ep, ep->num); - } - - } - - return retval; -} - -/* Completes request packet ... caller MUST hold lock */ -static void -complete_req(struct udc_ep *ep, struct udc_request *req, int sts) -__releases(ep->dev->lock) -__acquires(ep->dev->lock) -{ - struct udc *dev; - unsigned halted; - - VDBG(ep->dev, "complete_req(): ep%d\n", ep->num); - - dev = ep->dev; - /* unmap DMA */ - if (ep->dma) - usb_gadget_unmap_request(&dev->gadget, &req->req, ep->in); - - halted = ep->halted; - ep->halted = 1; - - /* set new status if pending */ - if (req->req.status == -EINPROGRESS) - req->req.status = sts; - - /* remove from ep queue */ - list_del_init(&req->queue); - - VDBG(ep->dev, "req %p => complete %d bytes at %s with sts %d\n", - &req->req, req->req.length, ep->ep.name, sts); - - spin_unlock(&dev->lock); - req->req.complete(&ep->ep, &req->req); - spin_lock(&dev->lock); - ep->halted = halted; -} - -/* frees pci pool descriptors of a DMA chain */ -static int udc_free_dma_chain(struct udc *dev, struct udc_request *req) -{ - - int ret_val = 0; - struct udc_data_dma *td; - struct udc_data_dma *td_last = NULL; - unsigned int i; - - DBG(dev, "free chain req = %p\n", req); - - /* do not free first desc., will be done by free for request */ - td_last = req->td_data; - td = phys_to_virt(td_last->next); - - for (i = 1; i < req->chain_len; i++) { - - pci_pool_free(dev->data_requests, td, - (dma_addr_t) td_last->next); - td_last = td; - td = phys_to_virt(td_last->next); - } - - return ret_val; -} - -/* Iterates to the end of a DMA chain and returns last descriptor */ -static struct udc_data_dma *udc_get_last_dma_desc(struct udc_request *req) -{ - struct udc_data_dma *td; - - td = req->td_data; - while (td && !(td->status & AMD_BIT(UDC_DMA_IN_STS_L))) - td = phys_to_virt(td->next); - - return td; - -} - -/* Iterates to the end of a DMA chain and counts bytes received */ -static u32 udc_get_ppbdu_rxbytes(struct udc_request *req) -{ - struct udc_data_dma *td; - u32 count; - - td = req->td_data; - /* received number bytes */ - count = AMD_GETBITS(td->status, UDC_DMA_OUT_STS_RXBYTES); - - while (td && !(td->status & AMD_BIT(UDC_DMA_IN_STS_L))) { - td = phys_to_virt(td->next); - /* received number bytes */ - if (td) { - count += AMD_GETBITS(td->status, - UDC_DMA_OUT_STS_RXBYTES); - } - } - - return count; - -} - -/* Creates or re-inits a DMA chain */ -static int udc_create_dma_chain( - struct udc_ep *ep, - struct udc_request *req, - unsigned long buf_len, gfp_t gfp_flags -) -{ - unsigned long bytes = req->req.length; - unsigned int i; - dma_addr_t dma_addr; - struct udc_data_dma *td = NULL; - struct udc_data_dma *last = NULL; - unsigned long txbytes; - unsigned create_new_chain = 0; - unsigned len; - - VDBG(ep->dev, "udc_create_dma_chain: bytes=%ld buf_len=%ld\n", - bytes, buf_len); - dma_addr = DMA_DONT_USE; - - /* unset L bit in first desc for OUT */ - if (!ep->in) - req->td_data->status &= AMD_CLEAR_BIT(UDC_DMA_IN_STS_L); - - /* alloc only new desc's if not already available */ - len = req->req.length / ep->ep.maxpacket; - if (req->req.length % ep->ep.maxpacket) - len++; - - if (len > req->chain_len) { - /* shorter chain already allocated before */ - if (req->chain_len > 1) - udc_free_dma_chain(ep->dev, req); - req->chain_len = len; - create_new_chain = 1; - } - - td = req->td_data; - /* gen. required number of descriptors and buffers */ - for (i = buf_len; i < bytes; i += buf_len) { - /* create or determine next desc. */ - if (create_new_chain) { - - td = pci_pool_alloc(ep->dev->data_requests, - gfp_flags, &dma_addr); - if (!td) - return -ENOMEM; - - td->status = 0; - } else if (i == buf_len) { - /* first td */ - td = (struct udc_data_dma *) phys_to_virt( - req->td_data->next); - td->status = 0; - } else { - td = (struct udc_data_dma *) phys_to_virt(last->next); - td->status = 0; - } - - - if (td) - td->bufptr = req->req.dma + i; /* assign buffer */ - else - break; - - /* short packet ? */ - if ((bytes - i) >= buf_len) { - txbytes = buf_len; - } else { - /* short packet */ - txbytes = bytes - i; - } - - /* link td and assign tx bytes */ - if (i == buf_len) { - if (create_new_chain) - req->td_data->next = dma_addr; - /* - else - req->td_data->next = virt_to_phys(td); - */ - /* write tx bytes */ - if (ep->in) { - /* first desc */ - req->td_data->status = - AMD_ADDBITS(req->td_data->status, - ep->ep.maxpacket, - UDC_DMA_IN_STS_TXBYTES); - /* second desc */ - td->status = AMD_ADDBITS(td->status, - txbytes, - UDC_DMA_IN_STS_TXBYTES); - } - } else { - if (create_new_chain) - last->next = dma_addr; - /* - else - last->next = virt_to_phys(td); - */ - if (ep->in) { - /* write tx bytes */ - td->status = AMD_ADDBITS(td->status, - txbytes, - UDC_DMA_IN_STS_TXBYTES); - } - } - last = td; - } - /* set last bit */ - if (td) { - td->status |= AMD_BIT(UDC_DMA_IN_STS_L); - /* last desc. points to itself */ - req->td_data_last = td; - } - - return 0; -} - -/* Enabling RX DMA */ -static void udc_set_rde(struct udc *dev) -{ - u32 tmp; - - VDBG(dev, "udc_set_rde()\n"); - /* stop RDE timer */ - if (timer_pending(&udc_timer)) { - set_rde = 0; - mod_timer(&udc_timer, jiffies - 1); - } - /* set RDE */ - tmp = readl(&dev->regs->ctl); - tmp |= AMD_BIT(UDC_DEVCTL_RDE); - writel(tmp, &dev->regs->ctl); -} - -/* Queues a request packet, called by gadget driver */ -static int -udc_queue(struct usb_ep *usbep, struct usb_request *usbreq, gfp_t gfp) -{ - int retval = 0; - u8 open_rxfifo = 0; - unsigned long iflags; - struct udc_ep *ep; - struct udc_request *req; - struct udc *dev; - u32 tmp; - - /* check the inputs */ - req = container_of(usbreq, struct udc_request, req); - - if (!usbep || !usbreq || !usbreq->complete || !usbreq->buf - || !list_empty(&req->queue)) - return -EINVAL; - - ep = container_of(usbep, struct udc_ep, ep); - if (!ep->ep.desc && (ep->num != 0 && ep->num != UDC_EP0OUT_IX)) - return -EINVAL; - - VDBG(ep->dev, "udc_queue(): ep%d-in=%d\n", ep->num, ep->in); - dev = ep->dev; - - if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) - return -ESHUTDOWN; - - /* map dma (usually done before) */ - if (ep->dma) { - VDBG(dev, "DMA map req %p\n", req); - retval = usb_gadget_map_request(&udc->gadget, usbreq, ep->in); - if (retval) - return retval; - } - - VDBG(dev, "%s queue req %p, len %d req->td_data=%p buf %p\n", - usbep->name, usbreq, usbreq->length, - req->td_data, usbreq->buf); - - spin_lock_irqsave(&dev->lock, iflags); - usbreq->actual = 0; - usbreq->status = -EINPROGRESS; - req->dma_done = 0; - - /* on empty queue just do first transfer */ - if (list_empty(&ep->queue)) { - /* zlp */ - if (usbreq->length == 0) { - /* IN zlp's are handled by hardware */ - complete_req(ep, req, 0); - VDBG(dev, "%s: zlp\n", ep->ep.name); - /* - * if set_config or set_intf is waiting for ack by zlp - * then set CSR_DONE - */ - if (dev->set_cfg_not_acked) { - tmp = readl(&dev->regs->ctl); - tmp |= AMD_BIT(UDC_DEVCTL_CSR_DONE); - writel(tmp, &dev->regs->ctl); - dev->set_cfg_not_acked = 0; - } - /* setup command is ACK'ed now by zlp */ - if (dev->waiting_zlp_ack_ep0in) { - /* clear NAK by writing CNAK in EP0_IN */ - tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); - dev->ep[UDC_EP0IN_IX].naking = 0; - UDC_QUEUE_CNAK(&dev->ep[UDC_EP0IN_IX], - UDC_EP0IN_IX); - dev->waiting_zlp_ack_ep0in = 0; - } - goto finished; - } - if (ep->dma) { - retval = prep_dma(ep, req, GFP_ATOMIC); - if (retval != 0) - goto finished; - /* write desc pointer to enable DMA */ - if (ep->in) { - /* set HOST READY */ - req->td_data->status = - AMD_ADDBITS(req->td_data->status, - UDC_DMA_IN_STS_BS_HOST_READY, - UDC_DMA_IN_STS_BS); - } - - /* disabled rx dma while descriptor update */ - if (!ep->in) { - /* stop RDE timer */ - if (timer_pending(&udc_timer)) { - set_rde = 0; - mod_timer(&udc_timer, jiffies - 1); - } - /* clear RDE */ - tmp = readl(&dev->regs->ctl); - tmp &= AMD_UNMASK_BIT(UDC_DEVCTL_RDE); - writel(tmp, &dev->regs->ctl); - open_rxfifo = 1; - - /* - * if BNA occurred then let BNA dummy desc. - * point to current desc. - */ - if (ep->bna_occurred) { - VDBG(dev, "copy to BNA dummy desc.\n"); - memcpy(ep->bna_dummy_req->td_data, - req->td_data, - sizeof(struct udc_data_dma)); - } - } - /* write desc pointer */ - writel(req->td_phys, &ep->regs->desptr); - - /* clear NAK by writing CNAK */ - if (ep->naking) { - tmp = readl(&ep->regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &ep->regs->ctl); - ep->naking = 0; - UDC_QUEUE_CNAK(ep, ep->num); - } - - if (ep->in) { - /* enable ep irq */ - tmp = readl(&dev->regs->ep_irqmsk); - tmp &= AMD_UNMASK_BIT(ep->num); - writel(tmp, &dev->regs->ep_irqmsk); - } - } else if (ep->in) { - /* enable ep irq */ - tmp = readl(&dev->regs->ep_irqmsk); - tmp &= AMD_UNMASK_BIT(ep->num); - writel(tmp, &dev->regs->ep_irqmsk); - } - - } else if (ep->dma) { - - /* - * prep_dma not used for OUT ep's, this is not possible - * for PPB modes, because of chain creation reasons - */ - if (ep->in) { - retval = prep_dma(ep, req, GFP_ATOMIC); - if (retval != 0) - goto finished; - } - } - VDBG(dev, "list_add\n"); - /* add request to ep queue */ - if (req) { - - list_add_tail(&req->queue, &ep->queue); - - /* open rxfifo if out data queued */ - if (open_rxfifo) { - /* enable DMA */ - req->dma_going = 1; - udc_set_rde(dev); - if (ep->num != UDC_EP0OUT_IX) - dev->data_ep_queued = 1; - } - /* stop OUT naking */ - if (!ep->in) { - if (!use_dma && udc_rxfifo_pending) { - DBG(dev, "udc_queue(): pending bytes in " - "rxfifo after nyet\n"); - /* - * read pending bytes afer nyet: - * referring to isr - */ - if (udc_rxfifo_read(ep, req)) { - /* finish */ - complete_req(ep, req, 0); - } - udc_rxfifo_pending = 0; - - } - } - } - -finished: - spin_unlock_irqrestore(&dev->lock, iflags); - return retval; -} - -/* Empty request queue of an endpoint; caller holds spinlock */ -static void empty_req_queue(struct udc_ep *ep) -{ - struct udc_request *req; - - ep->halted = 1; - while (!list_empty(&ep->queue)) { - req = list_entry(ep->queue.next, - struct udc_request, - queue); - complete_req(ep, req, -ESHUTDOWN); - } -} - -/* Dequeues a request packet, called by gadget driver */ -static int udc_dequeue(struct usb_ep *usbep, struct usb_request *usbreq) -{ - struct udc_ep *ep; - struct udc_request *req; - unsigned halted; - unsigned long iflags; - - ep = container_of(usbep, struct udc_ep, ep); - if (!usbep || !usbreq || (!ep->ep.desc && (ep->num != 0 - && ep->num != UDC_EP0OUT_IX))) - return -EINVAL; - - req = container_of(usbreq, struct udc_request, req); - - spin_lock_irqsave(&ep->dev->lock, iflags); - halted = ep->halted; - ep->halted = 1; - /* request in processing or next one */ - if (ep->queue.next == &req->queue) { - if (ep->dma && req->dma_going) { - if (ep->in) - ep->cancel_transfer = 1; - else { - u32 tmp; - u32 dma_sts; - /* stop potential receive DMA */ - tmp = readl(&udc->regs->ctl); - writel(tmp & AMD_UNMASK_BIT(UDC_DEVCTL_RDE), - &udc->regs->ctl); - /* - * Cancel transfer later in ISR - * if descriptor was touched. - */ - dma_sts = AMD_GETBITS(req->td_data->status, - UDC_DMA_OUT_STS_BS); - if (dma_sts != UDC_DMA_OUT_STS_BS_HOST_READY) - ep->cancel_transfer = 1; - else { - udc_init_bna_dummy(ep->req); - writel(ep->bna_dummy_req->td_phys, - &ep->regs->desptr); - } - writel(tmp, &udc->regs->ctl); - } - } - } - complete_req(ep, req, -ECONNRESET); - ep->halted = halted; - - spin_unlock_irqrestore(&ep->dev->lock, iflags); - return 0; -} - -/* Halt or clear halt of endpoint */ -static int -udc_set_halt(struct usb_ep *usbep, int halt) -{ - struct udc_ep *ep; - u32 tmp; - unsigned long iflags; - int retval = 0; - - if (!usbep) - return -EINVAL; - - pr_debug("set_halt %s: halt=%d\n", usbep->name, halt); - - ep = container_of(usbep, struct udc_ep, ep); - if (!ep->ep.desc && (ep->num != 0 && ep->num != UDC_EP0OUT_IX)) - return -EINVAL; - if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) - return -ESHUTDOWN; - - spin_lock_irqsave(&udc_stall_spinlock, iflags); - /* halt or clear halt */ - if (halt) { - if (ep->num == 0) - ep->dev->stall_ep0in = 1; - else { - /* - * set STALL - * rxfifo empty not taken into acount - */ - tmp = readl(&ep->regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_S); - writel(tmp, &ep->regs->ctl); - ep->halted = 1; - - /* setup poll timer */ - if (!timer_pending(&udc_pollstall_timer)) { - udc_pollstall_timer.expires = jiffies + - HZ * UDC_POLLSTALL_TIMER_USECONDS - / (1000 * 1000); - if (!stop_pollstall_timer) { - DBG(ep->dev, "start polltimer\n"); - add_timer(&udc_pollstall_timer); - } - } - } - } else { - /* ep is halted by set_halt() before */ - if (ep->halted) { - tmp = readl(&ep->regs->ctl); - /* clear stall bit */ - tmp = tmp & AMD_CLEAR_BIT(UDC_EPCTL_S); - /* clear NAK by writing CNAK */ - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &ep->regs->ctl); - ep->halted = 0; - UDC_QUEUE_CNAK(ep, ep->num); - } - } - spin_unlock_irqrestore(&udc_stall_spinlock, iflags); - return retval; -} - -/* gadget interface */ -static const struct usb_ep_ops udc_ep_ops = { - .enable = udc_ep_enable, - .disable = udc_ep_disable, - - .alloc_request = udc_alloc_request, - .free_request = udc_free_request, - - .queue = udc_queue, - .dequeue = udc_dequeue, - - .set_halt = udc_set_halt, - /* fifo ops not implemented */ -}; - -/*-------------------------------------------------------------------------*/ - -/* Get frame counter (not implemented) */ -static int udc_get_frame(struct usb_gadget *gadget) -{ - return -EOPNOTSUPP; -} - -/* Remote wakeup gadget interface */ -static int udc_wakeup(struct usb_gadget *gadget) -{ - struct udc *dev; - - if (!gadget) - return -EINVAL; - dev = container_of(gadget, struct udc, gadget); - udc_remote_wakeup(dev); - - return 0; -} - -static int amd5536_udc_start(struct usb_gadget *g, - struct usb_gadget_driver *driver); -static int amd5536_udc_stop(struct usb_gadget *g, - struct usb_gadget_driver *driver); -/* gadget operations */ -static const struct usb_gadget_ops udc_ops = { - .wakeup = udc_wakeup, - .get_frame = udc_get_frame, - .udc_start = amd5536_udc_start, - .udc_stop = amd5536_udc_stop, -}; - -/* Setups endpoint parameters, adds endpoints to linked list */ -static void make_ep_lists(struct udc *dev) -{ - /* make gadget ep lists */ - INIT_LIST_HEAD(&dev->gadget.ep_list); - list_add_tail(&dev->ep[UDC_EPIN_STATUS_IX].ep.ep_list, - &dev->gadget.ep_list); - list_add_tail(&dev->ep[UDC_EPIN_IX].ep.ep_list, - &dev->gadget.ep_list); - list_add_tail(&dev->ep[UDC_EPOUT_IX].ep.ep_list, - &dev->gadget.ep_list); - - /* fifo config */ - dev->ep[UDC_EPIN_STATUS_IX].fifo_depth = UDC_EPIN_SMALLINT_BUFF_SIZE; - if (dev->gadget.speed == USB_SPEED_FULL) - dev->ep[UDC_EPIN_IX].fifo_depth = UDC_FS_EPIN_BUFF_SIZE; - else if (dev->gadget.speed == USB_SPEED_HIGH) - dev->ep[UDC_EPIN_IX].fifo_depth = hs_tx_buf; - dev->ep[UDC_EPOUT_IX].fifo_depth = UDC_RXFIFO_SIZE; -} - -/* init registers at driver load time */ -static int startup_registers(struct udc *dev) -{ - u32 tmp; - - /* init controller by soft reset */ - udc_soft_reset(dev); - - /* mask not needed interrupts */ - udc_mask_unused_interrupts(dev); - - /* put into initial config */ - udc_basic_init(dev); - /* link up all endpoints */ - udc_setup_endpoints(dev); - - /* program speed */ - tmp = readl(&dev->regs->cfg); - if (use_fullspeed) - tmp = AMD_ADDBITS(tmp, UDC_DEVCFG_SPD_FS, UDC_DEVCFG_SPD); - else - tmp = AMD_ADDBITS(tmp, UDC_DEVCFG_SPD_HS, UDC_DEVCFG_SPD); - writel(tmp, &dev->regs->cfg); - - return 0; -} - -/* Inits UDC context */ -static void udc_basic_init(struct udc *dev) -{ - u32 tmp; - - DBG(dev, "udc_basic_init()\n"); - - dev->gadget.speed = USB_SPEED_UNKNOWN; - - /* stop RDE timer */ - if (timer_pending(&udc_timer)) { - set_rde = 0; - mod_timer(&udc_timer, jiffies - 1); - } - /* stop poll stall timer */ - if (timer_pending(&udc_pollstall_timer)) - mod_timer(&udc_pollstall_timer, jiffies - 1); - /* disable DMA */ - tmp = readl(&dev->regs->ctl); - tmp &= AMD_UNMASK_BIT(UDC_DEVCTL_RDE); - tmp &= AMD_UNMASK_BIT(UDC_DEVCTL_TDE); - writel(tmp, &dev->regs->ctl); - - /* enable dynamic CSR programming */ - tmp = readl(&dev->regs->cfg); - tmp |= AMD_BIT(UDC_DEVCFG_CSR_PRG); - /* set self powered */ - tmp |= AMD_BIT(UDC_DEVCFG_SP); - /* set remote wakeupable */ - tmp |= AMD_BIT(UDC_DEVCFG_RWKP); - writel(tmp, &dev->regs->cfg); - - make_ep_lists(dev); - - dev->data_ep_enabled = 0; - dev->data_ep_queued = 0; -} - -/* Sets initial endpoint parameters */ -static void udc_setup_endpoints(struct udc *dev) -{ - struct udc_ep *ep; - u32 tmp; - u32 reg; - - DBG(dev, "udc_setup_endpoints()\n"); - - /* read enum speed */ - tmp = readl(&dev->regs->sts); - tmp = AMD_GETBITS(tmp, UDC_DEVSTS_ENUM_SPEED); - if (tmp == UDC_DEVSTS_ENUM_SPEED_HIGH) - dev->gadget.speed = USB_SPEED_HIGH; - else if (tmp == UDC_DEVSTS_ENUM_SPEED_FULL) - dev->gadget.speed = USB_SPEED_FULL; - - /* set basic ep parameters */ - for (tmp = 0; tmp < UDC_EP_NUM; tmp++) { - ep = &dev->ep[tmp]; - ep->dev = dev; - ep->ep.name = ep_string[tmp]; - ep->num = tmp; - /* txfifo size is calculated at enable time */ - ep->txfifo = dev->txfifo; - - /* fifo size */ - if (tmp < UDC_EPIN_NUM) { - ep->fifo_depth = UDC_TXFIFO_SIZE; - ep->in = 1; - } else { - ep->fifo_depth = UDC_RXFIFO_SIZE; - ep->in = 0; - - } - ep->regs = &dev->ep_regs[tmp]; - /* - * ep will be reset only if ep was not enabled before to avoid - * disabling ep interrupts when ENUM interrupt occurs but ep is - * not enabled by gadget driver - */ - if (!ep->ep.desc) - ep_init(dev->regs, ep); - - if (use_dma) { - /* - * ep->dma is not really used, just to indicate that - * DMA is active: remove this - * dma regs = dev control regs - */ - ep->dma = &dev->regs->ctl; - - /* nak OUT endpoints until enable - not for ep0 */ - if (tmp != UDC_EP0IN_IX && tmp != UDC_EP0OUT_IX - && tmp > UDC_EPIN_NUM) { - /* set NAK */ - reg = readl(&dev->ep[tmp].regs->ctl); - reg |= AMD_BIT(UDC_EPCTL_SNAK); - writel(reg, &dev->ep[tmp].regs->ctl); - dev->ep[tmp].naking = 1; - - } - } - } - /* EP0 max packet */ - if (dev->gadget.speed == USB_SPEED_FULL) { - usb_ep_set_maxpacket_limit(&dev->ep[UDC_EP0IN_IX].ep, - UDC_FS_EP0IN_MAX_PKT_SIZE); - usb_ep_set_maxpacket_limit(&dev->ep[UDC_EP0OUT_IX].ep, - UDC_FS_EP0OUT_MAX_PKT_SIZE); - } else if (dev->gadget.speed == USB_SPEED_HIGH) { - usb_ep_set_maxpacket_limit(&dev->ep[UDC_EP0IN_IX].ep, - UDC_EP0IN_MAX_PKT_SIZE); - usb_ep_set_maxpacket_limit(&dev->ep[UDC_EP0OUT_IX].ep, - UDC_EP0OUT_MAX_PKT_SIZE); - } - - /* - * with suspend bug workaround, ep0 params for gadget driver - * are set at gadget driver bind() call - */ - dev->gadget.ep0 = &dev->ep[UDC_EP0IN_IX].ep; - dev->ep[UDC_EP0IN_IX].halted = 0; - INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); - - /* init cfg/alt/int */ - dev->cur_config = 0; - dev->cur_intf = 0; - dev->cur_alt = 0; -} - -/* Bringup after Connect event, initial bringup to be ready for ep0 events */ -static void usb_connect(struct udc *dev) -{ - - dev_info(&dev->pdev->dev, "USB Connect\n"); - - dev->connected = 1; - - /* put into initial config */ - udc_basic_init(dev); - - /* enable device setup interrupts */ - udc_enable_dev_setup_interrupts(dev); -} - -/* - * Calls gadget with disconnect event and resets the UDC and makes - * initial bringup to be ready for ep0 events - */ -static void usb_disconnect(struct udc *dev) -{ - - dev_info(&dev->pdev->dev, "USB Disconnect\n"); - - dev->connected = 0; - - /* mask interrupts */ - udc_mask_unused_interrupts(dev); - - /* REVISIT there doesn't seem to be a point to having this - * talk to a tasklet ... do it directly, we already hold - * the spinlock needed to process the disconnect. - */ - - tasklet_schedule(&disconnect_tasklet); -} - -/* Tasklet for disconnect to be outside of interrupt context */ -static void udc_tasklet_disconnect(unsigned long par) -{ - struct udc *dev = (struct udc *)(*((struct udc **) par)); - u32 tmp; - - DBG(dev, "Tasklet disconnect\n"); - spin_lock_irq(&dev->lock); - - if (dev->driver) { - spin_unlock(&dev->lock); - dev->driver->disconnect(&dev->gadget); - spin_lock(&dev->lock); - - /* empty queues */ - for (tmp = 0; tmp < UDC_EP_NUM; tmp++) - empty_req_queue(&dev->ep[tmp]); - - } - - /* disable ep0 */ - ep_init(dev->regs, - &dev->ep[UDC_EP0IN_IX]); - - - if (!soft_reset_occured) { - /* init controller by soft reset */ - udc_soft_reset(dev); - soft_reset_occured++; - } - - /* re-enable dev interrupts */ - udc_enable_dev_setup_interrupts(dev); - /* back to full speed ? */ - if (use_fullspeed) { - tmp = readl(&dev->regs->cfg); - tmp = AMD_ADDBITS(tmp, UDC_DEVCFG_SPD_FS, UDC_DEVCFG_SPD); - writel(tmp, &dev->regs->cfg); - } - - spin_unlock_irq(&dev->lock); -} - -/* Reset the UDC core */ -static void udc_soft_reset(struct udc *dev) -{ - unsigned long flags; - - DBG(dev, "Soft reset\n"); - /* - * reset possible waiting interrupts, because int. - * status is lost after soft reset, - * ep int. status reset - */ - writel(UDC_EPINT_MSK_DISABLE_ALL, &dev->regs->ep_irqsts); - /* device int. status reset */ - writel(UDC_DEV_MSK_DISABLE, &dev->regs->irqsts); - - spin_lock_irqsave(&udc_irq_spinlock, flags); - writel(AMD_BIT(UDC_DEVCFG_SOFTRESET), &dev->regs->cfg); - readl(&dev->regs->cfg); - spin_unlock_irqrestore(&udc_irq_spinlock, flags); - -} - -/* RDE timer callback to set RDE bit */ -static void udc_timer_function(unsigned long v) -{ - u32 tmp; - - spin_lock_irq(&udc_irq_spinlock); - - if (set_rde > 0) { - /* - * open the fifo if fifo was filled on last timer call - * conditionally - */ - if (set_rde > 1) { - /* set RDE to receive setup data */ - tmp = readl(&udc->regs->ctl); - tmp |= AMD_BIT(UDC_DEVCTL_RDE); - writel(tmp, &udc->regs->ctl); - set_rde = -1; - } else if (readl(&udc->regs->sts) - & AMD_BIT(UDC_DEVSTS_RXFIFO_EMPTY)) { - /* - * if fifo empty setup polling, do not just - * open the fifo - */ - udc_timer.expires = jiffies + HZ/UDC_RDE_TIMER_DIV; - if (!stop_timer) - add_timer(&udc_timer); - } else { - /* - * fifo contains data now, setup timer for opening - * the fifo when timer expires to be able to receive - * setup packets, when data packets gets queued by - * gadget layer then timer will forced to expire with - * set_rde=0 (RDE is set in udc_queue()) - */ - set_rde++; - /* debug: lhadmot_timer_start = 221070 */ - udc_timer.expires = jiffies + HZ*UDC_RDE_TIMER_SECONDS; - if (!stop_timer) - add_timer(&udc_timer); - } - - } else - set_rde = -1; /* RDE was set by udc_queue() */ - spin_unlock_irq(&udc_irq_spinlock); - if (stop_timer) - complete(&on_exit); - -} - -/* Handle halt state, used in stall poll timer */ -static void udc_handle_halt_state(struct udc_ep *ep) -{ - u32 tmp; - /* set stall as long not halted */ - if (ep->halted == 1) { - tmp = readl(&ep->regs->ctl); - /* STALL cleared ? */ - if (!(tmp & AMD_BIT(UDC_EPCTL_S))) { - /* - * FIXME: MSC spec requires that stall remains - * even on receivng of CLEAR_FEATURE HALT. So - * we would set STALL again here to be compliant. - * But with current mass storage drivers this does - * not work (would produce endless host retries). - * So we clear halt on CLEAR_FEATURE. - * - DBG(ep->dev, "ep %d: set STALL again\n", ep->num); - tmp |= AMD_BIT(UDC_EPCTL_S); - writel(tmp, &ep->regs->ctl);*/ - - /* clear NAK by writing CNAK */ - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &ep->regs->ctl); - ep->halted = 0; - UDC_QUEUE_CNAK(ep, ep->num); - } - } -} - -/* Stall timer callback to poll S bit and set it again after */ -static void udc_pollstall_timer_function(unsigned long v) -{ - struct udc_ep *ep; - int halted = 0; - - spin_lock_irq(&udc_stall_spinlock); - /* - * only one IN and OUT endpoints are handled - * IN poll stall - */ - ep = &udc->ep[UDC_EPIN_IX]; - udc_handle_halt_state(ep); - if (ep->halted) - halted = 1; - /* OUT poll stall */ - ep = &udc->ep[UDC_EPOUT_IX]; - udc_handle_halt_state(ep); - if (ep->halted) - halted = 1; - - /* setup timer again when still halted */ - if (!stop_pollstall_timer && halted) { - udc_pollstall_timer.expires = jiffies + - HZ * UDC_POLLSTALL_TIMER_USECONDS - / (1000 * 1000); - add_timer(&udc_pollstall_timer); - } - spin_unlock_irq(&udc_stall_spinlock); - - if (stop_pollstall_timer) - complete(&on_pollstall_exit); -} - -/* Inits endpoint 0 so that SETUP packets are processed */ -static void activate_control_endpoints(struct udc *dev) -{ - u32 tmp; - - DBG(dev, "activate_control_endpoints\n"); - - /* flush fifo */ - tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_F); - writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); - - /* set ep0 directions */ - dev->ep[UDC_EP0IN_IX].in = 1; - dev->ep[UDC_EP0OUT_IX].in = 0; - - /* set buffer size (tx fifo entries) of EP0_IN */ - tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->bufin_framenum); - if (dev->gadget.speed == USB_SPEED_FULL) - tmp = AMD_ADDBITS(tmp, UDC_FS_EPIN0_BUFF_SIZE, - UDC_EPIN_BUFF_SIZE); - else if (dev->gadget.speed == USB_SPEED_HIGH) - tmp = AMD_ADDBITS(tmp, UDC_EPIN0_BUFF_SIZE, - UDC_EPIN_BUFF_SIZE); - writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->bufin_framenum); - - /* set max packet size of EP0_IN */ - tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->bufout_maxpkt); - if (dev->gadget.speed == USB_SPEED_FULL) - tmp = AMD_ADDBITS(tmp, UDC_FS_EP0IN_MAX_PKT_SIZE, - UDC_EP_MAX_PKT_SIZE); - else if (dev->gadget.speed == USB_SPEED_HIGH) - tmp = AMD_ADDBITS(tmp, UDC_EP0IN_MAX_PKT_SIZE, - UDC_EP_MAX_PKT_SIZE); - writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->bufout_maxpkt); - - /* set max packet size of EP0_OUT */ - tmp = readl(&dev->ep[UDC_EP0OUT_IX].regs->bufout_maxpkt); - if (dev->gadget.speed == USB_SPEED_FULL) - tmp = AMD_ADDBITS(tmp, UDC_FS_EP0OUT_MAX_PKT_SIZE, - UDC_EP_MAX_PKT_SIZE); - else if (dev->gadget.speed == USB_SPEED_HIGH) - tmp = AMD_ADDBITS(tmp, UDC_EP0OUT_MAX_PKT_SIZE, - UDC_EP_MAX_PKT_SIZE); - writel(tmp, &dev->ep[UDC_EP0OUT_IX].regs->bufout_maxpkt); - - /* set max packet size of EP0 in UDC CSR */ - tmp = readl(&dev->csr->ne[0]); - if (dev->gadget.speed == USB_SPEED_FULL) - tmp = AMD_ADDBITS(tmp, UDC_FS_EP0OUT_MAX_PKT_SIZE, - UDC_CSR_NE_MAX_PKT); - else if (dev->gadget.speed == USB_SPEED_HIGH) - tmp = AMD_ADDBITS(tmp, UDC_EP0OUT_MAX_PKT_SIZE, - UDC_CSR_NE_MAX_PKT); - writel(tmp, &dev->csr->ne[0]); - - if (use_dma) { - dev->ep[UDC_EP0OUT_IX].td->status |= - AMD_BIT(UDC_DMA_OUT_STS_L); - /* write dma desc address */ - writel(dev->ep[UDC_EP0OUT_IX].td_stp_dma, - &dev->ep[UDC_EP0OUT_IX].regs->subptr); - writel(dev->ep[UDC_EP0OUT_IX].td_phys, - &dev->ep[UDC_EP0OUT_IX].regs->desptr); - /* stop RDE timer */ - if (timer_pending(&udc_timer)) { - set_rde = 0; - mod_timer(&udc_timer, jiffies - 1); - } - /* stop pollstall timer */ - if (timer_pending(&udc_pollstall_timer)) - mod_timer(&udc_pollstall_timer, jiffies - 1); - /* enable DMA */ - tmp = readl(&dev->regs->ctl); - tmp |= AMD_BIT(UDC_DEVCTL_MODE) - | AMD_BIT(UDC_DEVCTL_RDE) - | AMD_BIT(UDC_DEVCTL_TDE); - if (use_dma_bufferfill_mode) - tmp |= AMD_BIT(UDC_DEVCTL_BF); - else if (use_dma_ppb_du) - tmp |= AMD_BIT(UDC_DEVCTL_DU); - writel(tmp, &dev->regs->ctl); - } - - /* clear NAK by writing CNAK for EP0IN */ - tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); - dev->ep[UDC_EP0IN_IX].naking = 0; - UDC_QUEUE_CNAK(&dev->ep[UDC_EP0IN_IX], UDC_EP0IN_IX); - - /* clear NAK by writing CNAK for EP0OUT */ - tmp = readl(&dev->ep[UDC_EP0OUT_IX].regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &dev->ep[UDC_EP0OUT_IX].regs->ctl); - dev->ep[UDC_EP0OUT_IX].naking = 0; - UDC_QUEUE_CNAK(&dev->ep[UDC_EP0OUT_IX], UDC_EP0OUT_IX); -} - -/* Make endpoint 0 ready for control traffic */ -static int setup_ep0(struct udc *dev) -{ - activate_control_endpoints(dev); - /* enable ep0 interrupts */ - udc_enable_ep0_interrupts(dev); - /* enable device setup interrupts */ - udc_enable_dev_setup_interrupts(dev); - - return 0; -} - -/* Called by gadget driver to register itself */ -static int amd5536_udc_start(struct usb_gadget *g, - struct usb_gadget_driver *driver) -{ - struct udc *dev = to_amd5536_udc(g); - u32 tmp; - - driver->driver.bus = NULL; - dev->driver = driver; - - /* Some gadget drivers use both ep0 directions. - * NOTE: to gadget driver, ep0 is just one endpoint... - */ - dev->ep[UDC_EP0OUT_IX].ep.driver_data = - dev->ep[UDC_EP0IN_IX].ep.driver_data; - - /* get ready for ep0 traffic */ - setup_ep0(dev); - - /* clear SD */ - tmp = readl(&dev->regs->ctl); - tmp = tmp & AMD_CLEAR_BIT(UDC_DEVCTL_SD); - writel(tmp, &dev->regs->ctl); - - usb_connect(dev); - - return 0; -} - -/* shutdown requests and disconnect from gadget */ -static void -shutdown(struct udc *dev, struct usb_gadget_driver *driver) -__releases(dev->lock) -__acquires(dev->lock) -{ - int tmp; - - /* empty queues and init hardware */ - udc_basic_init(dev); - - for (tmp = 0; tmp < UDC_EP_NUM; tmp++) - empty_req_queue(&dev->ep[tmp]); - - udc_setup_endpoints(dev); -} - -/* Called by gadget driver to unregister itself */ -static int amd5536_udc_stop(struct usb_gadget *g, - struct usb_gadget_driver *driver) -{ - struct udc *dev = to_amd5536_udc(g); - unsigned long flags; - u32 tmp; - - spin_lock_irqsave(&dev->lock, flags); - udc_mask_unused_interrupts(dev); - shutdown(dev, driver); - spin_unlock_irqrestore(&dev->lock, flags); - - dev->driver = NULL; - - /* set SD */ - tmp = readl(&dev->regs->ctl); - tmp |= AMD_BIT(UDC_DEVCTL_SD); - writel(tmp, &dev->regs->ctl); - - return 0; -} - -/* Clear pending NAK bits */ -static void udc_process_cnak_queue(struct udc *dev) -{ - u32 tmp; - u32 reg; - - /* check epin's */ - DBG(dev, "CNAK pending queue processing\n"); - for (tmp = 0; tmp < UDC_EPIN_NUM_USED; tmp++) { - if (cnak_pending & (1 << tmp)) { - DBG(dev, "CNAK pending for ep%d\n", tmp); - /* clear NAK by writing CNAK */ - reg = readl(&dev->ep[tmp].regs->ctl); - reg |= AMD_BIT(UDC_EPCTL_CNAK); - writel(reg, &dev->ep[tmp].regs->ctl); - dev->ep[tmp].naking = 0; - UDC_QUEUE_CNAK(&dev->ep[tmp], dev->ep[tmp].num); - } - } - /* ... and ep0out */ - if (cnak_pending & (1 << UDC_EP0OUT_IX)) { - DBG(dev, "CNAK pending for ep%d\n", UDC_EP0OUT_IX); - /* clear NAK by writing CNAK */ - reg = readl(&dev->ep[UDC_EP0OUT_IX].regs->ctl); - reg |= AMD_BIT(UDC_EPCTL_CNAK); - writel(reg, &dev->ep[UDC_EP0OUT_IX].regs->ctl); - dev->ep[UDC_EP0OUT_IX].naking = 0; - UDC_QUEUE_CNAK(&dev->ep[UDC_EP0OUT_IX], - dev->ep[UDC_EP0OUT_IX].num); - } -} - -/* Enabling RX DMA after setup packet */ -static void udc_ep0_set_rde(struct udc *dev) -{ - if (use_dma) { - /* - * only enable RXDMA when no data endpoint enabled - * or data is queued - */ - if (!dev->data_ep_enabled || dev->data_ep_queued) { - udc_set_rde(dev); - } else { - /* - * setup timer for enabling RDE (to not enable - * RXFIFO DMA for data endpoints to early) - */ - if (set_rde != 0 && !timer_pending(&udc_timer)) { - udc_timer.expires = - jiffies + HZ/UDC_RDE_TIMER_DIV; - set_rde = 1; - if (!stop_timer) - add_timer(&udc_timer); - } - } - } -} - - -/* Interrupt handler for data OUT traffic */ -static irqreturn_t udc_data_out_isr(struct udc *dev, int ep_ix) -{ - irqreturn_t ret_val = IRQ_NONE; - u32 tmp; - struct udc_ep *ep; - struct udc_request *req; - unsigned int count; - struct udc_data_dma *td = NULL; - unsigned dma_done; - - VDBG(dev, "ep%d irq\n", ep_ix); - ep = &dev->ep[ep_ix]; - - tmp = readl(&ep->regs->sts); - if (use_dma) { - /* BNA event ? */ - if (tmp & AMD_BIT(UDC_EPSTS_BNA)) { - DBG(dev, "BNA ep%dout occurred - DESPTR = %x\n", - ep->num, readl(&ep->regs->desptr)); - /* clear BNA */ - writel(tmp | AMD_BIT(UDC_EPSTS_BNA), &ep->regs->sts); - if (!ep->cancel_transfer) - ep->bna_occurred = 1; - else - ep->cancel_transfer = 0; - ret_val = IRQ_HANDLED; - goto finished; - } - } - /* HE event ? */ - if (tmp & AMD_BIT(UDC_EPSTS_HE)) { - dev_err(&dev->pdev->dev, "HE ep%dout occurred\n", ep->num); - - /* clear HE */ - writel(tmp | AMD_BIT(UDC_EPSTS_HE), &ep->regs->sts); - ret_val = IRQ_HANDLED; - goto finished; - } - - if (!list_empty(&ep->queue)) { - - /* next request */ - req = list_entry(ep->queue.next, - struct udc_request, queue); - } else { - req = NULL; - udc_rxfifo_pending = 1; - } - VDBG(dev, "req = %p\n", req); - /* fifo mode */ - if (!use_dma) { - - /* read fifo */ - if (req && udc_rxfifo_read(ep, req)) { - ret_val = IRQ_HANDLED; - - /* finish */ - complete_req(ep, req, 0); - /* next request */ - if (!list_empty(&ep->queue) && !ep->halted) { - req = list_entry(ep->queue.next, - struct udc_request, queue); - } else - req = NULL; - } - - /* DMA */ - } else if (!ep->cancel_transfer && req != NULL) { - ret_val = IRQ_HANDLED; - - /* check for DMA done */ - if (!use_dma_ppb) { - dma_done = AMD_GETBITS(req->td_data->status, - UDC_DMA_OUT_STS_BS); - /* packet per buffer mode - rx bytes */ - } else { - /* - * if BNA occurred then recover desc. from - * BNA dummy desc. - */ - if (ep->bna_occurred) { - VDBG(dev, "Recover desc. from BNA dummy\n"); - memcpy(req->td_data, ep->bna_dummy_req->td_data, - sizeof(struct udc_data_dma)); - ep->bna_occurred = 0; - udc_init_bna_dummy(ep->req); - } - td = udc_get_last_dma_desc(req); - dma_done = AMD_GETBITS(td->status, UDC_DMA_OUT_STS_BS); - } - if (dma_done == UDC_DMA_OUT_STS_BS_DMA_DONE) { - /* buffer fill mode - rx bytes */ - if (!use_dma_ppb) { - /* received number bytes */ - count = AMD_GETBITS(req->td_data->status, - UDC_DMA_OUT_STS_RXBYTES); - VDBG(dev, "rx bytes=%u\n", count); - /* packet per buffer mode - rx bytes */ - } else { - VDBG(dev, "req->td_data=%p\n", req->td_data); - VDBG(dev, "last desc = %p\n", td); - /* received number bytes */ - if (use_dma_ppb_du) { - /* every desc. counts bytes */ - count = udc_get_ppbdu_rxbytes(req); - } else { - /* last desc. counts bytes */ - count = AMD_GETBITS(td->status, - UDC_DMA_OUT_STS_RXBYTES); - if (!count && req->req.length - == UDC_DMA_MAXPACKET) { - /* - * on 64k packets the RXBYTES - * field is zero - */ - count = UDC_DMA_MAXPACKET; - } - } - VDBG(dev, "last desc rx bytes=%u\n", count); - } - - tmp = req->req.length - req->req.actual; - if (count > tmp) { - if ((tmp % ep->ep.maxpacket) != 0) { - DBG(dev, "%s: rx %db, space=%db\n", - ep->ep.name, count, tmp); - req->req.status = -EOVERFLOW; - } - count = tmp; - } - req->req.actual += count; - req->dma_going = 0; - /* complete request */ - complete_req(ep, req, 0); - - /* next request */ - if (!list_empty(&ep->queue) && !ep->halted) { - req = list_entry(ep->queue.next, - struct udc_request, - queue); - /* - * DMA may be already started by udc_queue() - * called by gadget drivers completion - * routine. This happens when queue - * holds one request only. - */ - if (req->dma_going == 0) { - /* next dma */ - if (prep_dma(ep, req, GFP_ATOMIC) != 0) - goto finished; - /* write desc pointer */ - writel(req->td_phys, - &ep->regs->desptr); - req->dma_going = 1; - /* enable DMA */ - udc_set_rde(dev); - } - } else { - /* - * implant BNA dummy descriptor to allow - * RXFIFO opening by RDE - */ - if (ep->bna_dummy_req) { - /* write desc pointer */ - writel(ep->bna_dummy_req->td_phys, - &ep->regs->desptr); - ep->bna_occurred = 0; - } - - /* - * schedule timer for setting RDE if queue - * remains empty to allow ep0 packets pass - * through - */ - if (set_rde != 0 - && !timer_pending(&udc_timer)) { - udc_timer.expires = - jiffies - + HZ*UDC_RDE_TIMER_SECONDS; - set_rde = 1; - if (!stop_timer) - add_timer(&udc_timer); - } - if (ep->num != UDC_EP0OUT_IX) - dev->data_ep_queued = 0; - } - - } else { - /* - * RX DMA must be reenabled for each desc in PPBDU mode - * and must be enabled for PPBNDU mode in case of BNA - */ - udc_set_rde(dev); - } - - } else if (ep->cancel_transfer) { - ret_val = IRQ_HANDLED; - ep->cancel_transfer = 0; - } - - /* check pending CNAKS */ - if (cnak_pending) { - /* CNAk processing when rxfifo empty only */ - if (readl(&dev->regs->sts) & AMD_BIT(UDC_DEVSTS_RXFIFO_EMPTY)) - udc_process_cnak_queue(dev); - } - - /* clear OUT bits in ep status */ - writel(UDC_EPSTS_OUT_CLEAR, &ep->regs->sts); -finished: - return ret_val; -} - -/* Interrupt handler for data IN traffic */ -static irqreturn_t udc_data_in_isr(struct udc *dev, int ep_ix) -{ - irqreturn_t ret_val = IRQ_NONE; - u32 tmp; - u32 epsts; - struct udc_ep *ep; - struct udc_request *req; - struct udc_data_dma *td; - unsigned dma_done; - unsigned len; - - ep = &dev->ep[ep_ix]; - - epsts = readl(&ep->regs->sts); - if (use_dma) { - /* BNA ? */ - if (epsts & AMD_BIT(UDC_EPSTS_BNA)) { - dev_err(&dev->pdev->dev, - "BNA ep%din occurred - DESPTR = %08lx\n", - ep->num, - (unsigned long) readl(&ep->regs->desptr)); - - /* clear BNA */ - writel(epsts, &ep->regs->sts); - ret_val = IRQ_HANDLED; - goto finished; - } - } - /* HE event ? */ - if (epsts & AMD_BIT(UDC_EPSTS_HE)) { - dev_err(&dev->pdev->dev, - "HE ep%dn occurred - DESPTR = %08lx\n", - ep->num, (unsigned long) readl(&ep->regs->desptr)); - - /* clear HE */ - writel(epsts | AMD_BIT(UDC_EPSTS_HE), &ep->regs->sts); - ret_val = IRQ_HANDLED; - goto finished; - } - - /* DMA completion */ - if (epsts & AMD_BIT(UDC_EPSTS_TDC)) { - VDBG(dev, "TDC set- completion\n"); - ret_val = IRQ_HANDLED; - if (!ep->cancel_transfer && !list_empty(&ep->queue)) { - req = list_entry(ep->queue.next, - struct udc_request, queue); - /* - * length bytes transferred - * check dma done of last desc. in PPBDU mode - */ - if (use_dma_ppb_du) { - td = udc_get_last_dma_desc(req); - if (td) { - dma_done = - AMD_GETBITS(td->status, - UDC_DMA_IN_STS_BS); - /* don't care DMA done */ - req->req.actual = req->req.length; - } - } else { - /* assume all bytes transferred */ - req->req.actual = req->req.length; - } - - if (req->req.actual == req->req.length) { - /* complete req */ - complete_req(ep, req, 0); - req->dma_going = 0; - /* further request available ? */ - if (list_empty(&ep->queue)) { - /* disable interrupt */ - tmp = readl(&dev->regs->ep_irqmsk); - tmp |= AMD_BIT(ep->num); - writel(tmp, &dev->regs->ep_irqmsk); - } - } - } - ep->cancel_transfer = 0; - - } - /* - * status reg has IN bit set and TDC not set (if TDC was handled, - * IN must not be handled (UDC defect) ? - */ - if ((epsts & AMD_BIT(UDC_EPSTS_IN)) - && !(epsts & AMD_BIT(UDC_EPSTS_TDC))) { - ret_val = IRQ_HANDLED; - if (!list_empty(&ep->queue)) { - /* next request */ - req = list_entry(ep->queue.next, - struct udc_request, queue); - /* FIFO mode */ - if (!use_dma) { - /* write fifo */ - udc_txfifo_write(ep, &req->req); - len = req->req.length - req->req.actual; - if (len > ep->ep.maxpacket) - len = ep->ep.maxpacket; - req->req.actual += len; - if (req->req.actual == req->req.length - || (len != ep->ep.maxpacket)) { - /* complete req */ - complete_req(ep, req, 0); - } - /* DMA */ - } else if (req && !req->dma_going) { - VDBG(dev, "IN DMA : req=%p req->td_data=%p\n", - req, req->td_data); - if (req->td_data) { - - req->dma_going = 1; - - /* - * unset L bit of first desc. - * for chain - */ - if (use_dma_ppb && req->req.length > - ep->ep.maxpacket) { - req->td_data->status &= - AMD_CLEAR_BIT( - UDC_DMA_IN_STS_L); - } - - /* write desc pointer */ - writel(req->td_phys, &ep->regs->desptr); - - /* set HOST READY */ - req->td_data->status = - AMD_ADDBITS( - req->td_data->status, - UDC_DMA_IN_STS_BS_HOST_READY, - UDC_DMA_IN_STS_BS); - - /* set poll demand bit */ - tmp = readl(&ep->regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_P); - writel(tmp, &ep->regs->ctl); - } - } - - } else if (!use_dma && ep->in) { - /* disable interrupt */ - tmp = readl( - &dev->regs->ep_irqmsk); - tmp |= AMD_BIT(ep->num); - writel(tmp, - &dev->regs->ep_irqmsk); - } - } - /* clear status bits */ - writel(epsts, &ep->regs->sts); - -finished: - return ret_val; - -} - -/* Interrupt handler for Control OUT traffic */ -static irqreturn_t udc_control_out_isr(struct udc *dev) -__releases(dev->lock) -__acquires(dev->lock) -{ - irqreturn_t ret_val = IRQ_NONE; - u32 tmp; - int setup_supported; - u32 count; - int set = 0; - struct udc_ep *ep; - struct udc_ep *ep_tmp; - - ep = &dev->ep[UDC_EP0OUT_IX]; - - /* clear irq */ - writel(AMD_BIT(UDC_EPINT_OUT_EP0), &dev->regs->ep_irqsts); - - tmp = readl(&dev->ep[UDC_EP0OUT_IX].regs->sts); - /* check BNA and clear if set */ - if (tmp & AMD_BIT(UDC_EPSTS_BNA)) { - VDBG(dev, "ep0: BNA set\n"); - writel(AMD_BIT(UDC_EPSTS_BNA), - &dev->ep[UDC_EP0OUT_IX].regs->sts); - ep->bna_occurred = 1; - ret_val = IRQ_HANDLED; - goto finished; - } - - /* type of data: SETUP or DATA 0 bytes */ - tmp = AMD_GETBITS(tmp, UDC_EPSTS_OUT); - VDBG(dev, "data_typ = %x\n", tmp); - - /* setup data */ - if (tmp == UDC_EPSTS_OUT_SETUP) { - ret_val = IRQ_HANDLED; - - ep->dev->stall_ep0in = 0; - dev->waiting_zlp_ack_ep0in = 0; - - /* set NAK for EP0_IN */ - tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_SNAK); - writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); - dev->ep[UDC_EP0IN_IX].naking = 1; - /* get setup data */ - if (use_dma) { - - /* clear OUT bits in ep status */ - writel(UDC_EPSTS_OUT_CLEAR, - &dev->ep[UDC_EP0OUT_IX].regs->sts); - - setup_data.data[0] = - dev->ep[UDC_EP0OUT_IX].td_stp->data12; - setup_data.data[1] = - dev->ep[UDC_EP0OUT_IX].td_stp->data34; - /* set HOST READY */ - dev->ep[UDC_EP0OUT_IX].td_stp->status = - UDC_DMA_STP_STS_BS_HOST_READY; - } else { - /* read fifo */ - udc_rxfifo_read_dwords(dev, setup_data.data, 2); - } - - /* determine direction of control data */ - if ((setup_data.request.bRequestType & USB_DIR_IN) != 0) { - dev->gadget.ep0 = &dev->ep[UDC_EP0IN_IX].ep; - /* enable RDE */ - udc_ep0_set_rde(dev); - set = 0; - } else { - dev->gadget.ep0 = &dev->ep[UDC_EP0OUT_IX].ep; - /* - * implant BNA dummy descriptor to allow RXFIFO opening - * by RDE - */ - if (ep->bna_dummy_req) { - /* write desc pointer */ - writel(ep->bna_dummy_req->td_phys, - &dev->ep[UDC_EP0OUT_IX].regs->desptr); - ep->bna_occurred = 0; - } - - set = 1; - dev->ep[UDC_EP0OUT_IX].naking = 1; - /* - * setup timer for enabling RDE (to not enable - * RXFIFO DMA for data to early) - */ - set_rde = 1; - if (!timer_pending(&udc_timer)) { - udc_timer.expires = jiffies + - HZ/UDC_RDE_TIMER_DIV; - if (!stop_timer) - add_timer(&udc_timer); - } - } - - /* - * mass storage reset must be processed here because - * next packet may be a CLEAR_FEATURE HALT which would not - * clear the stall bit when no STALL handshake was received - * before (autostall can cause this) - */ - if (setup_data.data[0] == UDC_MSCRES_DWORD0 - && setup_data.data[1] == UDC_MSCRES_DWORD1) { - DBG(dev, "MSC Reset\n"); - /* - * clear stall bits - * only one IN and OUT endpoints are handled - */ - ep_tmp = &udc->ep[UDC_EPIN_IX]; - udc_set_halt(&ep_tmp->ep, 0); - ep_tmp = &udc->ep[UDC_EPOUT_IX]; - udc_set_halt(&ep_tmp->ep, 0); - } - - /* call gadget with setup data received */ - spin_unlock(&dev->lock); - setup_supported = dev->driver->setup(&dev->gadget, - &setup_data.request); - spin_lock(&dev->lock); - - tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); - /* ep0 in returns data (not zlp) on IN phase */ - if (setup_supported >= 0 && setup_supported < - UDC_EP0IN_MAXPACKET) { - /* clear NAK by writing CNAK in EP0_IN */ - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); - dev->ep[UDC_EP0IN_IX].naking = 0; - UDC_QUEUE_CNAK(&dev->ep[UDC_EP0IN_IX], UDC_EP0IN_IX); - - /* if unsupported request then stall */ - } else if (setup_supported < 0) { - tmp |= AMD_BIT(UDC_EPCTL_S); - writel(tmp, &dev->ep[UDC_EP0IN_IX].regs->ctl); - } else - dev->waiting_zlp_ack_ep0in = 1; - - - /* clear NAK by writing CNAK in EP0_OUT */ - if (!set) { - tmp = readl(&dev->ep[UDC_EP0OUT_IX].regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_CNAK); - writel(tmp, &dev->ep[UDC_EP0OUT_IX].regs->ctl); - dev->ep[UDC_EP0OUT_IX].naking = 0; - UDC_QUEUE_CNAK(&dev->ep[UDC_EP0OUT_IX], UDC_EP0OUT_IX); - } - - if (!use_dma) { - /* clear OUT bits in ep status */ - writel(UDC_EPSTS_OUT_CLEAR, - &dev->ep[UDC_EP0OUT_IX].regs->sts); - } - - /* data packet 0 bytes */ - } else if (tmp == UDC_EPSTS_OUT_DATA) { - /* clear OUT bits in ep status */ - writel(UDC_EPSTS_OUT_CLEAR, &dev->ep[UDC_EP0OUT_IX].regs->sts); - - /* get setup data: only 0 packet */ - if (use_dma) { - /* no req if 0 packet, just reactivate */ - if (list_empty(&dev->ep[UDC_EP0OUT_IX].queue)) { - VDBG(dev, "ZLP\n"); - - /* set HOST READY */ - dev->ep[UDC_EP0OUT_IX].td->status = - AMD_ADDBITS( - dev->ep[UDC_EP0OUT_IX].td->status, - UDC_DMA_OUT_STS_BS_HOST_READY, - UDC_DMA_OUT_STS_BS); - /* enable RDE */ - udc_ep0_set_rde(dev); - ret_val = IRQ_HANDLED; - - } else { - /* control write */ - ret_val |= udc_data_out_isr(dev, UDC_EP0OUT_IX); - /* re-program desc. pointer for possible ZLPs */ - writel(dev->ep[UDC_EP0OUT_IX].td_phys, - &dev->ep[UDC_EP0OUT_IX].regs->desptr); - /* enable RDE */ - udc_ep0_set_rde(dev); - } - } else { - - /* received number bytes */ - count = readl(&dev->ep[UDC_EP0OUT_IX].regs->sts); - count = AMD_GETBITS(count, UDC_EPSTS_RX_PKT_SIZE); - /* out data for fifo mode not working */ - count = 0; - - /* 0 packet or real data ? */ - if (count != 0) { - ret_val |= udc_data_out_isr(dev, UDC_EP0OUT_IX); - } else { - /* dummy read confirm */ - readl(&dev->ep[UDC_EP0OUT_IX].regs->confirm); - ret_val = IRQ_HANDLED; - } - } - } - - /* check pending CNAKS */ - if (cnak_pending) { - /* CNAk processing when rxfifo empty only */ - if (readl(&dev->regs->sts) & AMD_BIT(UDC_DEVSTS_RXFIFO_EMPTY)) - udc_process_cnak_queue(dev); - } - -finished: - return ret_val; -} - -/* Interrupt handler for Control IN traffic */ -static irqreturn_t udc_control_in_isr(struct udc *dev) -{ - irqreturn_t ret_val = IRQ_NONE; - u32 tmp; - struct udc_ep *ep; - struct udc_request *req; - unsigned len; - - ep = &dev->ep[UDC_EP0IN_IX]; - - /* clear irq */ - writel(AMD_BIT(UDC_EPINT_IN_EP0), &dev->regs->ep_irqsts); - - tmp = readl(&dev->ep[UDC_EP0IN_IX].regs->sts); - /* DMA completion */ - if (tmp & AMD_BIT(UDC_EPSTS_TDC)) { - VDBG(dev, "isr: TDC clear\n"); - ret_val = IRQ_HANDLED; - - /* clear TDC bit */ - writel(AMD_BIT(UDC_EPSTS_TDC), - &dev->ep[UDC_EP0IN_IX].regs->sts); - - /* status reg has IN bit set ? */ - } else if (tmp & AMD_BIT(UDC_EPSTS_IN)) { - ret_val = IRQ_HANDLED; - - if (ep->dma) { - /* clear IN bit */ - writel(AMD_BIT(UDC_EPSTS_IN), - &dev->ep[UDC_EP0IN_IX].regs->sts); - } - if (dev->stall_ep0in) { - DBG(dev, "stall ep0in\n"); - /* halt ep0in */ - tmp = readl(&ep->regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_S); - writel(tmp, &ep->regs->ctl); - } else { - if (!list_empty(&ep->queue)) { - /* next request */ - req = list_entry(ep->queue.next, - struct udc_request, queue); - - if (ep->dma) { - /* write desc pointer */ - writel(req->td_phys, &ep->regs->desptr); - /* set HOST READY */ - req->td_data->status = - AMD_ADDBITS( - req->td_data->status, - UDC_DMA_STP_STS_BS_HOST_READY, - UDC_DMA_STP_STS_BS); - - /* set poll demand bit */ - tmp = - readl(&dev->ep[UDC_EP0IN_IX].regs->ctl); - tmp |= AMD_BIT(UDC_EPCTL_P); - writel(tmp, - &dev->ep[UDC_EP0IN_IX].regs->ctl); - - /* all bytes will be transferred */ - req->req.actual = req->req.length; - - /* complete req */ - complete_req(ep, req, 0); - - } else { - /* write fifo */ - udc_txfifo_write(ep, &req->req); - - /* lengh bytes transferred */ - len = req->req.length - req->req.actual; - if (len > ep->ep.maxpacket) - len = ep->ep.maxpacket; - - req->req.actual += len; - if (req->req.actual == req->req.length - || (len != ep->ep.maxpacket)) { - /* complete req */ - complete_req(ep, req, 0); - } - } - - } - } - ep->halted = 0; - dev->stall_ep0in = 0; - if (!ep->dma) { - /* clear IN bit */ - writel(AMD_BIT(UDC_EPSTS_IN), - &dev->ep[UDC_EP0IN_IX].regs->sts); - } - } - - return ret_val; -} - - -/* Interrupt handler for global device events */ -static irqreturn_t udc_dev_isr(struct udc *dev, u32 dev_irq) -__releases(dev->lock) -__acquires(dev->lock) -{ - irqreturn_t ret_val = IRQ_NONE; - u32 tmp; - u32 cfg; - struct udc_ep *ep; - u16 i; - u8 udc_csr_epix; - - /* SET_CONFIG irq ? */ - if (dev_irq & AMD_BIT(UDC_DEVINT_SC)) { - ret_val = IRQ_HANDLED; - - /* read config value */ - tmp = readl(&dev->regs->sts); - cfg = AMD_GETBITS(tmp, UDC_DEVSTS_CFG); - DBG(dev, "SET_CONFIG interrupt: config=%d\n", cfg); - dev->cur_config = cfg; - dev->set_cfg_not_acked = 1; - - /* make usb request for gadget driver */ - memset(&setup_data, 0 , sizeof(union udc_setup_data)); - setup_data.request.bRequest = USB_REQ_SET_CONFIGURATION; - setup_data.request.wValue = cpu_to_le16(dev->cur_config); - - /* programm the NE registers */ - for (i = 0; i < UDC_EP_NUM; i++) { - ep = &dev->ep[i]; - if (ep->in) { - - /* ep ix in UDC CSR register space */ - udc_csr_epix = ep->num; - - - /* OUT ep */ - } else { - /* ep ix in UDC CSR register space */ - udc_csr_epix = ep->num - UDC_CSR_EP_OUT_IX_OFS; - } - - tmp = readl(&dev->csr->ne[udc_csr_epix]); - /* ep cfg */ - tmp = AMD_ADDBITS(tmp, ep->dev->cur_config, - UDC_CSR_NE_CFG); - /* write reg */ - writel(tmp, &dev->csr->ne[udc_csr_epix]); - - /* clear stall bits */ - ep->halted = 0; - tmp = readl(&ep->regs->ctl); - tmp = tmp & AMD_CLEAR_BIT(UDC_EPCTL_S); - writel(tmp, &ep->regs->ctl); - } - /* call gadget zero with setup data received */ - spin_unlock(&dev->lock); - tmp = dev->driver->setup(&dev->gadget, &setup_data.request); - spin_lock(&dev->lock); - - } /* SET_INTERFACE ? */ - if (dev_irq & AMD_BIT(UDC_DEVINT_SI)) { - ret_val = IRQ_HANDLED; - - dev->set_cfg_not_acked = 1; - /* read interface and alt setting values */ - tmp = readl(&dev->regs->sts); - dev->cur_alt = AMD_GETBITS(tmp, UDC_DEVSTS_ALT); - dev->cur_intf = AMD_GETBITS(tmp, UDC_DEVSTS_INTF); - - /* make usb request for gadget driver */ - memset(&setup_data, 0 , sizeof(union udc_setup_data)); - setup_data.request.bRequest = USB_REQ_SET_INTERFACE; - setup_data.request.bRequestType = USB_RECIP_INTERFACE; - setup_data.request.wValue = cpu_to_le16(dev->cur_alt); - setup_data.request.wIndex = cpu_to_le16(dev->cur_intf); - - DBG(dev, "SET_INTERFACE interrupt: alt=%d intf=%d\n", - dev->cur_alt, dev->cur_intf); - - /* programm the NE registers */ - for (i = 0; i < UDC_EP_NUM; i++) { - ep = &dev->ep[i]; - if (ep->in) { - - /* ep ix in UDC CSR register space */ - udc_csr_epix = ep->num; - - - /* OUT ep */ - } else { - /* ep ix in UDC CSR register space */ - udc_csr_epix = ep->num - UDC_CSR_EP_OUT_IX_OFS; - } - - /* UDC CSR reg */ - /* set ep values */ - tmp = readl(&dev->csr->ne[udc_csr_epix]); - /* ep interface */ - tmp = AMD_ADDBITS(tmp, ep->dev->cur_intf, - UDC_CSR_NE_INTF); - /* tmp = AMD_ADDBITS(tmp, 2, UDC_CSR_NE_INTF); */ - /* ep alt */ - tmp = AMD_ADDBITS(tmp, ep->dev->cur_alt, - UDC_CSR_NE_ALT); - /* write reg */ - writel(tmp, &dev->csr->ne[udc_csr_epix]); - - /* clear stall bits */ - ep->halted = 0; - tmp = readl(&ep->regs->ctl); - tmp = tmp & AMD_CLEAR_BIT(UDC_EPCTL_S); - writel(tmp, &ep->regs->ctl); - } - - /* call gadget zero with setup data received */ - spin_unlock(&dev->lock); - tmp = dev->driver->setup(&dev->gadget, &setup_data.request); - spin_lock(&dev->lock); - - } /* USB reset */ - if (dev_irq & AMD_BIT(UDC_DEVINT_UR)) { - DBG(dev, "USB Reset interrupt\n"); - ret_val = IRQ_HANDLED; - - /* allow soft reset when suspend occurs */ - soft_reset_occured = 0; - - dev->waiting_zlp_ack_ep0in = 0; - dev->set_cfg_not_acked = 0; - - /* mask not needed interrupts */ - udc_mask_unused_interrupts(dev); - - /* call gadget to resume and reset configs etc. */ - spin_unlock(&dev->lock); - if (dev->sys_suspended && dev->driver->resume) { - dev->driver->resume(&dev->gadget); - dev->sys_suspended = 0; - } - dev->driver->disconnect(&dev->gadget); - spin_lock(&dev->lock); - - /* disable ep0 to empty req queue */ - empty_req_queue(&dev->ep[UDC_EP0IN_IX]); - ep_init(dev->regs, &dev->ep[UDC_EP0IN_IX]); - - /* soft reset when rxfifo not empty */ - tmp = readl(&dev->regs->sts); - if (!(tmp & AMD_BIT(UDC_DEVSTS_RXFIFO_EMPTY)) - && !soft_reset_after_usbreset_occured) { - udc_soft_reset(dev); - soft_reset_after_usbreset_occured++; - } - - /* - * DMA reset to kill potential old DMA hw hang, - * POLL bit is already reset by ep_init() through - * disconnect() - */ - DBG(dev, "DMA machine reset\n"); - tmp = readl(&dev->regs->cfg); - writel(tmp | AMD_BIT(UDC_DEVCFG_DMARST), &dev->regs->cfg); - writel(tmp, &dev->regs->cfg); - - /* put into initial config */ - udc_basic_init(dev); - - /* enable device setup interrupts */ - udc_enable_dev_setup_interrupts(dev); - - /* enable suspend interrupt */ - tmp = readl(&dev->regs->irqmsk); - tmp &= AMD_UNMASK_BIT(UDC_DEVINT_US); - writel(tmp, &dev->regs->irqmsk); - - } /* USB suspend */ - if (dev_irq & AMD_BIT(UDC_DEVINT_US)) { - DBG(dev, "USB Suspend interrupt\n"); - ret_val = IRQ_HANDLED; - if (dev->driver->suspend) { - spin_unlock(&dev->lock); - dev->sys_suspended = 1; - dev->driver->suspend(&dev->gadget); - spin_lock(&dev->lock); - } - } /* new speed ? */ - if (dev_irq & AMD_BIT(UDC_DEVINT_ENUM)) { - DBG(dev, "ENUM interrupt\n"); - ret_val = IRQ_HANDLED; - soft_reset_after_usbreset_occured = 0; - - /* disable ep0 to empty req queue */ - empty_req_queue(&dev->ep[UDC_EP0IN_IX]); - ep_init(dev->regs, &dev->ep[UDC_EP0IN_IX]); - - /* link up all endpoints */ - udc_setup_endpoints(dev); - dev_info(&dev->pdev->dev, "Connect: %s\n", - usb_speed_string(dev->gadget.speed)); - - /* init ep 0 */ - activate_control_endpoints(dev); - - /* enable ep0 interrupts */ - udc_enable_ep0_interrupts(dev); - } - /* session valid change interrupt */ - if (dev_irq & AMD_BIT(UDC_DEVINT_SVC)) { - DBG(dev, "USB SVC interrupt\n"); - ret_val = IRQ_HANDLED; - - /* check that session is not valid to detect disconnect */ - tmp = readl(&dev->regs->sts); - if (!(tmp & AMD_BIT(UDC_DEVSTS_SESSVLD))) { - /* disable suspend interrupt */ - tmp = readl(&dev->regs->irqmsk); - tmp |= AMD_BIT(UDC_DEVINT_US); - writel(tmp, &dev->regs->irqmsk); - DBG(dev, "USB Disconnect (session valid low)\n"); - /* cleanup on disconnect */ - usb_disconnect(udc); - } - - } - - return ret_val; -} - -/* Interrupt Service Routine, see Linux Kernel Doc for parameters */ -static irqreturn_t udc_irq(int irq, void *pdev) -{ - struct udc *dev = pdev; - u32 reg; - u16 i; - u32 ep_irq; - irqreturn_t ret_val = IRQ_NONE; - - spin_lock(&dev->lock); - - /* check for ep irq */ - reg = readl(&dev->regs->ep_irqsts); - if (reg) { - if (reg & AMD_BIT(UDC_EPINT_OUT_EP0)) - ret_val |= udc_control_out_isr(dev); - if (reg & AMD_BIT(UDC_EPINT_IN_EP0)) - ret_val |= udc_control_in_isr(dev); - - /* - * data endpoint - * iterate ep's - */ - for (i = 1; i < UDC_EP_NUM; i++) { - ep_irq = 1 << i; - if (!(reg & ep_irq) || i == UDC_EPINT_OUT_EP0) - continue; - - /* clear irq status */ - writel(ep_irq, &dev->regs->ep_irqsts); - - /* irq for out ep ? */ - if (i > UDC_EPIN_NUM) - ret_val |= udc_data_out_isr(dev, i); - else - ret_val |= udc_data_in_isr(dev, i); - } - - } - - - /* check for dev irq */ - reg = readl(&dev->regs->irqsts); - if (reg) { - /* clear irq */ - writel(reg, &dev->regs->irqsts); - ret_val |= udc_dev_isr(dev, reg); - } - - - spin_unlock(&dev->lock); - return ret_val; -} - -/* Tears down device */ -static void gadget_release(struct device *pdev) -{ - struct amd5536udc *dev = dev_get_drvdata(pdev); - kfree(dev); -} - -/* Cleanup on device remove */ -static void udc_remove(struct udc *dev) -{ - /* remove timer */ - stop_timer++; - if (timer_pending(&udc_timer)) - wait_for_completion(&on_exit); - if (udc_timer.data) - del_timer_sync(&udc_timer); - /* remove pollstall timer */ - stop_pollstall_timer++; - if (timer_pending(&udc_pollstall_timer)) - wait_for_completion(&on_pollstall_exit); - if (udc_pollstall_timer.data) - del_timer_sync(&udc_pollstall_timer); - udc = NULL; -} - -/* Reset all pci context */ -static void udc_pci_remove(struct pci_dev *pdev) -{ - struct udc *dev; - - dev = pci_get_drvdata(pdev); - - usb_del_gadget_udc(&udc->gadget); - /* gadget driver must not be registered */ - BUG_ON(dev->driver != NULL); - - /* dma pool cleanup */ - if (dev->data_requests) - pci_pool_destroy(dev->data_requests); - - if (dev->stp_requests) { - /* cleanup DMA desc's for ep0in */ - pci_pool_free(dev->stp_requests, - dev->ep[UDC_EP0OUT_IX].td_stp, - dev->ep[UDC_EP0OUT_IX].td_stp_dma); - pci_pool_free(dev->stp_requests, - dev->ep[UDC_EP0OUT_IX].td, - dev->ep[UDC_EP0OUT_IX].td_phys); - - pci_pool_destroy(dev->stp_requests); - } - - /* reset controller */ - writel(AMD_BIT(UDC_DEVCFG_SOFTRESET), &dev->regs->cfg); - if (dev->irq_registered) - free_irq(pdev->irq, dev); - if (dev->regs) - iounmap(dev->regs); - if (dev->mem_region) - release_mem_region(pci_resource_start(pdev, 0), - pci_resource_len(pdev, 0)); - if (dev->active) - pci_disable_device(pdev); - - udc_remove(dev); -} - -/* create dma pools on init */ -static int init_dma_pools(struct udc *dev) -{ - struct udc_stp_dma *td_stp; - struct udc_data_dma *td_data; - int retval; - - /* consistent DMA mode setting ? */ - if (use_dma_ppb) { - use_dma_bufferfill_mode = 0; - } else { - use_dma_ppb_du = 0; - use_dma_bufferfill_mode = 1; - } - - /* DMA setup */ - dev->data_requests = dma_pool_create("data_requests", NULL, - sizeof(struct udc_data_dma), 0, 0); - if (!dev->data_requests) { - DBG(dev, "can't get request data pool\n"); - retval = -ENOMEM; - goto finished; - } - - /* EP0 in dma regs = dev control regs */ - dev->ep[UDC_EP0IN_IX].dma = &dev->regs->ctl; - - /* dma desc for setup data */ - dev->stp_requests = dma_pool_create("setup requests", NULL, - sizeof(struct udc_stp_dma), 0, 0); - if (!dev->stp_requests) { - DBG(dev, "can't get stp request pool\n"); - retval = -ENOMEM; - goto finished; - } - /* setup */ - td_stp = dma_pool_alloc(dev->stp_requests, GFP_KERNEL, - &dev->ep[UDC_EP0OUT_IX].td_stp_dma); - if (td_stp == NULL) { - retval = -ENOMEM; - goto finished; - } - dev->ep[UDC_EP0OUT_IX].td_stp = td_stp; - - /* data: 0 packets !? */ - td_data = dma_pool_alloc(dev->stp_requests, GFP_KERNEL, - &dev->ep[UDC_EP0OUT_IX].td_phys); - if (td_data == NULL) { - retval = -ENOMEM; - goto finished; - } - dev->ep[UDC_EP0OUT_IX].td = td_data; - return 0; - -finished: - return retval; -} - -/* Called by pci bus driver to init pci context */ -static int udc_pci_probe( - struct pci_dev *pdev, - const struct pci_device_id *id -) -{ - struct udc *dev; - unsigned long resource; - unsigned long len; - int retval = 0; - - /* one udc only */ - if (udc) { - dev_dbg(&pdev->dev, "already probed\n"); - return -EBUSY; - } - - /* init */ - dev = kzalloc(sizeof(struct udc), GFP_KERNEL); - if (!dev) { - retval = -ENOMEM; - goto finished; - } - - /* pci setup */ - if (pci_enable_device(pdev) < 0) { - kfree(dev); - dev = NULL; - retval = -ENODEV; - goto finished; - } - dev->active = 1; - - /* PCI resource allocation */ - resource = pci_resource_start(pdev, 0); - len = pci_resource_len(pdev, 0); - - if (!request_mem_region(resource, len, name)) { - dev_dbg(&pdev->dev, "pci device used already\n"); - kfree(dev); - dev = NULL; - retval = -EBUSY; - goto finished; - } - dev->mem_region = 1; - - dev->virt_addr = ioremap_nocache(resource, len); - if (dev->virt_addr == NULL) { - dev_dbg(&pdev->dev, "start address cannot be mapped\n"); - kfree(dev); - dev = NULL; - retval = -EFAULT; - goto finished; - } - - if (!pdev->irq) { - dev_err(&pdev->dev, "irq not set\n"); - kfree(dev); - dev = NULL; - retval = -ENODEV; - goto finished; - } - - spin_lock_init(&dev->lock); - /* udc csr registers base */ - dev->csr = dev->virt_addr + UDC_CSR_ADDR; - /* dev registers base */ - dev->regs = dev->virt_addr + UDC_DEVCFG_ADDR; - /* ep registers base */ - dev->ep_regs = dev->virt_addr + UDC_EPREGS_ADDR; - /* fifo's base */ - dev->rxfifo = (u32 __iomem *)(dev->virt_addr + UDC_RXFIFO_ADDR); - dev->txfifo = (u32 __iomem *)(dev->virt_addr + UDC_TXFIFO_ADDR); - - if (request_irq(pdev->irq, udc_irq, IRQF_SHARED, name, dev) != 0) { - dev_dbg(&pdev->dev, "request_irq(%d) fail\n", pdev->irq); - kfree(dev); - dev = NULL; - retval = -EBUSY; - goto finished; - } - dev->irq_registered = 1; - - pci_set_drvdata(pdev, dev); - - /* chip revision for Hs AMD5536 */ - dev->chiprev = pdev->revision; - - pci_set_master(pdev); - pci_try_set_mwi(pdev); - - /* init dma pools */ - if (use_dma) { - retval = init_dma_pools(dev); - if (retval != 0) - goto finished; - } - - dev->phys_addr = resource; - dev->irq = pdev->irq; - dev->pdev = pdev; - - /* general probing */ - if (udc_probe(dev) == 0) - return 0; - -finished: - if (dev) - udc_pci_remove(pdev); - return retval; -} - -/* general probe */ -static int udc_probe(struct udc *dev) -{ - char tmp[128]; - u32 reg; - int retval; - - /* mark timer as not initialized */ - udc_timer.data = 0; - udc_pollstall_timer.data = 0; - - /* device struct setup */ - dev->gadget.ops = &udc_ops; - - dev_set_name(&dev->gadget.dev, "gadget"); - dev->gadget.name = name; - dev->gadget.max_speed = USB_SPEED_HIGH; - - /* init registers, interrupts, ... */ - startup_registers(dev); - - dev_info(&dev->pdev->dev, "%s\n", mod_desc); - - snprintf(tmp, sizeof tmp, "%d", dev->irq); - dev_info(&dev->pdev->dev, - "irq %s, pci mem %08lx, chip rev %02x(Geode5536 %s)\n", - tmp, dev->phys_addr, dev->chiprev, - (dev->chiprev == UDC_HSA0_REV) ? "A0" : "B1"); - strcpy(tmp, UDC_DRIVER_VERSION_STRING); - if (dev->chiprev == UDC_HSA0_REV) { - dev_err(&dev->pdev->dev, "chip revision is A0; too old\n"); - retval = -ENODEV; - goto finished; - } - dev_info(&dev->pdev->dev, - "driver version: %s(for Geode5536 B1)\n", tmp); - udc = dev; - - retval = usb_add_gadget_udc_release(&udc->pdev->dev, &dev->gadget, - gadget_release); - if (retval) - goto finished; - - /* timer init */ - init_timer(&udc_timer); - udc_timer.function = udc_timer_function; - udc_timer.data = 1; - /* timer pollstall init */ - init_timer(&udc_pollstall_timer); - udc_pollstall_timer.function = udc_pollstall_timer_function; - udc_pollstall_timer.data = 1; - - /* set SD */ - reg = readl(&dev->regs->ctl); - reg |= AMD_BIT(UDC_DEVCTL_SD); - writel(reg, &dev->regs->ctl); - - /* print dev register info */ - print_regs(dev); - - return 0; - -finished: - return retval; -} - -/* Initiates a remote wakeup */ -static int udc_remote_wakeup(struct udc *dev) -{ - unsigned long flags; - u32 tmp; - - DBG(dev, "UDC initiates remote wakeup\n"); - - spin_lock_irqsave(&dev->lock, flags); - - tmp = readl(&dev->regs->ctl); - tmp |= AMD_BIT(UDC_DEVCTL_RES); - writel(tmp, &dev->regs->ctl); - tmp &= AMD_CLEAR_BIT(UDC_DEVCTL_RES); - writel(tmp, &dev->regs->ctl); - - spin_unlock_irqrestore(&dev->lock, flags); - return 0; -} - -/* PCI device parameters */ -static const struct pci_device_id pci_id[] = { - { - PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x2096), - .class = (PCI_CLASS_SERIAL_USB << 8) | 0xfe, - .class_mask = 0xffffffff, - }, - {}, -}; -MODULE_DEVICE_TABLE(pci, pci_id); - -/* PCI functions */ -static struct pci_driver udc_pci_driver = { - .name = (char *) name, - .id_table = pci_id, - .probe = udc_pci_probe, - .remove = udc_pci_remove, -}; - -module_pci_driver(udc_pci_driver); - -MODULE_DESCRIPTION(UDC_MOD_DESCRIPTION); -MODULE_AUTHOR("Thomas Dahlmann"); -MODULE_LICENSE("GPL"); - |