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path: root/drivers/usb/gadget/udc/amd5536udc.c
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Diffstat (limited to 'drivers/usb/gadget/udc/amd5536udc.c')
-rw-r--r--drivers/usb/gadget/udc/amd5536udc.c266
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");