diff options
Diffstat (limited to 'drivers/usb/gadget/udc/amd5536udc.c')
| -rw-r--r-- | drivers/usb/gadget/udc/amd5536udc.c | 266 |
1 files changed, 36 insertions, 230 deletions
diff --git a/drivers/usb/gadget/udc/amd5536udc.c b/drivers/usb/gadget/udc/amd5536udc.c index ea03ca7ae29a..4ecd2f20ea48 100644 --- a/drivers/usb/gadget/udc/amd5536udc.c +++ b/drivers/usb/gadget/udc/amd5536udc.c @@ -11,27 +11,15 @@ */ /* - * 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. + * This file does the core driver implementation for the UDC that is based + * on Synopsys device controller IP (different than HS OTG IP) that is either + * connected through PCI bus or integrated to SoC platforms. */ -/* debug control */ -/* #define UDC_VERBOSE */ - /* Driver strings */ -#define UDC_MOD_DESCRIPTION "AMD 5536 UDC - USB Device Controller" +#define UDC_MOD_DESCRIPTION "Synopsys USB Device Controller" #define UDC_DRIVER_VERSION_STRING "01.00.0206" -/* system */ #include <linux/module.h> #include <linux/pci.h> #include <linux/kernel.h> @@ -46,23 +34,12 @@ #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 <linux/moduleparam.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 void udc_setup_endpoints(struct udc *dev); @@ -72,7 +49,7 @@ static void udc_free_request(struct usb_ep *usbep, struct usb_request *usbreq); /* description */ static const char mod_desc[] = UDC_MOD_DESCRIPTION; -static const char name[] = "amd5536udc"; +static const char name[] = "udc"; /* structure to hold endpoint function pointers */ static const struct usb_ep_ops udc_ep_ops; @@ -208,30 +185,11 @@ static const struct { #undef EP_INFO }; -/* 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) @@ -267,7 +225,7 @@ static void print_regs(struct udc *dev) } /* Masks unused interrupts */ -static int udc_mask_unused_interrupts(struct udc *dev) +int udc_mask_unused_interrupts(struct udc *dev) { u32 tmp; @@ -287,6 +245,7 @@ static int udc_mask_unused_interrupts(struct udc *dev) return 0; } +EXPORT_SYMBOL_GPL(udc_mask_unused_interrupts); /* Enables endpoint 0 interrupts */ static int udc_enable_ep0_interrupts(struct udc *dev) @@ -306,7 +265,7 @@ static int udc_enable_ep0_interrupts(struct udc *dev) } /* Enables device interrupts for SET_INTF and SET_CONFIG */ -static int udc_enable_dev_setup_interrupts(struct udc *dev) +int udc_enable_dev_setup_interrupts(struct udc *dev) { u32 tmp; @@ -325,6 +284,7 @@ static int udc_enable_dev_setup_interrupts(struct udc *dev) return 0; } +EXPORT_SYMBOL_GPL(udc_enable_dev_setup_interrupts); /* Calculates fifo start of endpoint based on preceding endpoints */ static int udc_set_txfifo_addr(struct udc_ep *ep) @@ -583,7 +543,7 @@ udc_alloc_request(struct usb_ep *usbep, gfp_t gfp) if (ep->dma) { /* ep0 in requests are allocated from data pool here */ - dma_desc = pci_pool_alloc(ep->dev->data_requests, gfp, + dma_desc = dma_pool_alloc(ep->dev->data_requests, gfp, &req->td_phys); if (!dma_desc) { kfree(req); @@ -608,27 +568,23 @@ udc_alloc_request(struct usb_ep *usbep, gfp_t gfp) } /* frees pci pool descriptors of a DMA chain */ -static int udc_free_dma_chain(struct udc *dev, struct udc_request *req) +static void 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; + struct udc_data_dma *td = req->td_data; unsigned int i; + dma_addr_t addr_next = 0x00; + dma_addr_t addr = (dma_addr_t)td->next; + 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); + td = phys_to_virt(addr); + addr_next = (dma_addr_t)td->next; + dma_pool_free(dev->data_requests, td, addr); + addr = addr_next; } - - return ret_val; } /* Frees request packet, called by gadget driver */ @@ -652,7 +608,7 @@ udc_free_request(struct usb_ep *usbep, struct usb_request *usbreq) if (req->chain_len > 1) udc_free_dma_chain(ep->dev, req); - pci_pool_free(ep->dev->data_requests, req->td_data, + dma_pool_free(ep->dev->data_requests, req->td_data, req->td_phys); } kfree(req); @@ -847,7 +803,7 @@ static int udc_create_dma_chain( 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, + td = dma_pool_alloc(ep->dev->data_requests, gfp_flags, &dma_addr); if (!td) return -ENOMEM; @@ -1507,7 +1463,7 @@ static void make_ep_lists(struct udc *dev) } /* Inits UDC context */ -static void udc_basic_init(struct udc *dev) +void udc_basic_init(struct udc *dev) { u32 tmp; @@ -1543,6 +1499,7 @@ static void udc_basic_init(struct udc *dev) dev->data_ep_enabled = 0; dev->data_ep_queued = 0; } +EXPORT_SYMBOL_GPL(udc_basic_init); /* init registers at driver load time */ static int startup_registers(struct udc *dev) @@ -3031,7 +2988,7 @@ __acquires(dev->lock) } /* Interrupt Service Routine, see Linux Kernel Doc for parameters */ -static irqreturn_t udc_irq(int irq, void *pdev) +irqreturn_t udc_irq(int irq, void *pdev) { struct udc *dev = pdev; u32 reg; @@ -3083,16 +3040,18 @@ static irqreturn_t udc_irq(int irq, void *pdev) spin_unlock(&dev->lock); return ret_val; } +EXPORT_SYMBOL_GPL(udc_irq); /* Tears down device */ -static void gadget_release(struct device *pdev) +void gadget_release(struct device *pdev) { struct amd5536udc *dev = dev_get_drvdata(pdev); kfree(dev); } +EXPORT_SYMBOL_GPL(gadget_release); /* Cleanup on device remove */ -static void udc_remove(struct udc *dev) +void udc_remove(struct udc *dev) { /* remove timer */ stop_timer++; @@ -3108,9 +3067,10 @@ static void udc_remove(struct udc *dev) del_timer_sync(&udc_pollstall_timer); udc = NULL; } +EXPORT_SYMBOL_GPL(udc_remove); /* free all the dma pools */ -static void free_dma_pools(struct udc *dev) +void free_dma_pools(struct udc *dev) { dma_pool_free(dev->stp_requests, dev->ep[UDC_EP0OUT_IX].td, dev->ep[UDC_EP0OUT_IX].td_phys); @@ -3119,35 +3079,10 @@ static void free_dma_pools(struct udc *dev) dma_pool_destroy(dev->stp_requests); dma_pool_destroy(dev->data_requests); } - -/* 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 */ - if (WARN_ON(dev->driver)) - return; - - /* dma pool cleanup */ - free_dma_pools(dev); - - /* reset controller */ - writel(AMD_BIT(UDC_DEVCFG_SOFTRESET), &dev->regs->cfg); - free_irq(pdev->irq, dev); - iounmap(dev->virt_addr); - release_mem_region(pci_resource_start(pdev, 0), - pci_resource_len(pdev, 0)); - pci_disable_device(pdev); - - udc_remove(dev); -} +EXPORT_SYMBOL_GPL(free_dma_pools); /* create dma pools on init */ -static int init_dma_pools(struct udc *dev) +int init_dma_pools(struct udc *dev) { struct udc_stp_dma *td_stp; struct udc_data_dma *td_data; @@ -3210,9 +3145,10 @@ err_create_dma_pool: dev->data_requests = NULL; return retval; } +EXPORT_SYMBOL_GPL(init_dma_pools); /* general probe */ -static int udc_probe(struct udc *dev) +int udc_probe(struct udc *dev) { char tmp[128]; u32 reg; @@ -3276,137 +3212,7 @@ static int udc_probe(struct udc *dev) 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) - return -ENOMEM; - - /* pci setup */ - if (pci_enable_device(pdev) < 0) { - retval = -ENODEV; - goto err_pcidev; - } - - /* 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"); - retval = -EBUSY; - goto err_memreg; - } - - dev->virt_addr = ioremap_nocache(resource, len); - if (!dev->virt_addr) { - dev_dbg(&pdev->dev, "start address cannot be mapped\n"); - retval = -EFAULT; - goto err_ioremap; - } - - if (!pdev->irq) { - dev_err(&pdev->dev, "irq not set\n"); - retval = -ENODEV; - goto err_irq; - } - - 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); - retval = -EBUSY; - goto err_irq; - } - - 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 err_dma; - } - - dev->phys_addr = resource; - dev->irq = pdev->irq; - dev->pdev = pdev; - - /* general probing */ - if (udc_probe(dev)) { - retval = -ENODEV; - goto err_probe; - } - return 0; - -err_probe: - if (use_dma) - free_dma_pools(dev); -err_dma: - free_irq(pdev->irq, dev); -err_irq: - iounmap(dev->virt_addr); -err_ioremap: - release_mem_region(resource, len); -err_memreg: - pci_disable_device(pdev); -err_pcidev: - kfree(dev); - return retval; -} - -/* PCI device parameters */ -static const struct pci_device_id pci_id[] = { - { - PCI_DEVICE(PCI_VENDOR_ID_AMD, 0x2096), - .class = PCI_CLASS_SERIAL_USB_DEVICE, - .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); +EXPORT_SYMBOL_GPL(udc_probe); MODULE_DESCRIPTION(UDC_MOD_DESCRIPTION); MODULE_AUTHOR("Thomas Dahlmann"); |