[RFC] usb: port UHCI driver from the u-boot
pmamonov at gmail.com
pmamonov at gmail.com
Mon Jan 18 09:55:15 PST 2016
From: Peter Mamonov <pmamonov at gmail.com>
Here is a UHCI driver ported from the u-boot.
There are a few pending FIXMEs, but the driver should work.
Can anyone test it?
BINDING:
uhci: uhci at 00000000 {
compatible = "generic-uhci";
reg = <0x00000000 0x200>;
/* specify companion EHCI controller if any */
companion = <&ehci>;
};
Signed-off-by: Peter Mamonov <pmamonov at gmail.com>
---
drivers/usb/host/Kconfig | 4 +
drivers/usb/host/Makefile | 1 +
drivers/usb/host/uhci-hcd.c | 1336 +++++++++++++++++++++++++++++++++++++++++++
drivers/usb/host/uhci-hcd.h | 165 ++++++
4 files changed, 1506 insertions(+)
create mode 100644 drivers/usb/host/uhci-hcd.c
create mode 100644 drivers/usb/host/uhci-hcd.h
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 54eaf46..61d981e 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -1,3 +1,7 @@
+config USB_UHCI
+ bool "UHCI driver"
+ depends on HAS_DMA
+
config USB_EHCI
bool "EHCI driver"
depends on HAS_DMA
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 0478d34..628ba61 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_USB_UHCI) += uhci-hcd.o
obj-$(CONFIG_USB_EHCI) += ehci-hcd.o
obj-$(CONFIG_USB_EHCI_OMAP) += ehci-omap.o
obj-$(CONFIG_USB_EHCI_ATMEL) += ehci-atmel.o
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
new file mode 100644
index 0000000..cabd783
--- /dev/null
+++ b/drivers/usb/host/uhci-hcd.c
@@ -0,0 +1,1336 @@
+/*
+ * Part of this code has been derived from linux:
+ * Universal Host Controller Interface driver for USB (take II).
+ *
+ * (c) 1999-2001 Georg Acher, acher at in.tum.de (executive slave) (base guitar)
+ * Deti Fliegl, deti at fliegl.de (executive slave) (lead voice)
+ * Thomas Sailer, sailer at ife.ee.ethz.ch (chief consultant) (cheer
+ * leader)
+ * Roman Weissgaerber, weissg at vienna.at (virt root hub) (studio
+ * porter)
+ * (c) 2000 Yggdrasil Computing, Inc. (port of new PCI interface support
+ * from usb-ohci.c by Adam Richter, adam at yggdrasil.com).
+ * (C) 2000 David Brownell, david-b at pacbell.net (usb-ohci.c)
+ *
+ * HW-initalization based on material of
+ *
+ * (C) Copyright 1999 Linus Torvalds
+ * (C) Copyright 1999 Johannes Erdfelt
+ * (C) Copyright 1999 Randy Dunlap
+ * (C) Copyright 1999 Gregory P. Smith
+ *
+ *
+ * Adapted for U-Boot:
+ * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/**********************************************************************
+ * How it works:
+ * -------------
+ * The framelist / Transfer descriptor / Queue Heads are similar like
+ * in the linux usb_uhci.c.
+ *
+ * During initialization, the following skeleton is allocated in init_skel:
+ *
+ * framespecific | common chain
+ *
+ * framelist[]
+ * [ 0 ]-----> TD ---------\
+ * [ 1 ]-----> TD ----------> TD ------> QH -------> QH -------> QH ---> NULL
+ * ... TD ---------/
+ * [1023]-----> TD --------/
+ *
+ * ^^ ^^ ^^ ^^ ^^
+ * 7 TDs for 1 TD for Start of Start of End Chain
+ * INT (2-128ms) 1ms-INT CTRL Chain BULK Chain
+ *
+ *
+ * Since this is a bootloader, the isochronous transfer descriptor have been
+ * removed.
+ *
+ * Interrupt Transfers.
+ * --------------------
+ * For Interrupt transfers USB_MAX_TEMP_INT_TD Transfer descriptor are
+ * available. They will be inserted after the appropriate (depending the
+ * interval setting) skeleton TD. If an interrupt has been detected the
+ * dev->irqhandler is called. The status and number of transfered bytes is
+ * stored in dev->irq_status resp. dev->irq_act_len. If the dev->irqhandler
+ * returns 0, the interrupt TD is removed and disabled. If an 1 is returned, the
+ * interrupt TD will be reactivated.
+ *
+ * Control Transfers
+ * -----------------
+ * Control Transfers are issued by filling the tmp_td with the appropriate data
+ * and connect them to the qh_cntrl queue header. Before other control/bulk
+ * transfers can be issued, the programm has to wait for completion. This does
+ * not allows asynchronous data transfer.
+ *
+ * Bulk Transfers
+ * --------------
+ * Bulk Transfers are issued by filling the tmp_td with the appropriate data and
+ * connect them to the qh_bulk queue header. Before other control/bulk transfers
+ * can be issued, the programm has to wait for completion. This does not allows
+ * asynchronous data transfer.
+ */
+
+#include <common.h>
+#include <driver.h>
+#include <init.h>
+#include <io.h>
+#include <dma.h>
+#include <usb/usb.h>
+#include "uhci-hcd.h"
+
+/* number of temporary TDs for bulk and control transfers */
+#define USB_MAX_TEMP_TD 128
+/* number of temporary TDs for Interrupt transfers */
+#define USB_MAX_TEMP_INT_TD 32
+
+#undef USB_UHCI_DEBUG
+
+struct uhci_priv {
+ struct device_d *dev;
+ void *base_addr;
+ struct usb_host host;
+ int devnum; /* Address of Root Hub endpoint */
+ int numports; /* number of ports */
+ int c_p_r[8]; /* C_PORT_RESET */
+ struct uhci_td *td_int; /* Interrupt Transfer descriptors */
+ dma_addr_t td_int_dma;
+ struct uhci_qh *qh_cntrl; /* control Queue Head */
+ dma_addr_t qh_cntrl_dma;
+ struct uhci_qh *qh_bulk; /* bulk Queue Head */
+ dma_addr_t qh_bulk_dma;
+ struct uhci_qh *qh_end; /* end Queue Head */
+ dma_addr_t qh_end_dma;
+ struct uhci_td *td_last; /* last TD (linked with end chain) */
+ dma_addr_t td_last_dma;
+ /* temporary tds */
+ struct uhci_td *tmp_td; /* temporary bulk/control td's */
+ dma_addr_t tmp_td_dma;
+ struct uhci_td *tmp_int_td; /* temporary interrupt td's */
+ dma_addr_t tmp_int_td_dma;
+ unsigned long *framelist; /* frame list */
+ dma_addr_t framelist_dma;
+};
+
+/* Device descriptor */
+static __u8 root_hub_dev_des[] = {
+ 0x12, /* __u8 bLength; */
+ 0x01, /* __u8 bDescriptorType; Device */
+ 0x10, /* __u16 bcdUSB; v1.1 */
+ 0x01,
+ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
+ 0x00, /* __u8 bDeviceSubClass; */
+ 0x00, /* __u8 bDeviceProtocol; */
+ 0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
+ 0x00, /* __u16 idVendor; */
+ 0x00,
+ 0x00, /* __u16 idProduct; */
+ 0x00,
+ 0x00, /* __u16 bcdDevice; */
+ 0x00,
+ 0x00, /* __u8 iManufacturer; */
+ 0x01, /* __u8 iProduct; */
+ 0x00, /* __u8 iSerialNumber; */
+ 0x01, /* __u8 bNumConfigurations; */
+};
+
+static __u8 root_hub_config_des[] = {
+ 0x09, /* __u8 bLength; */
+ 0x02, /* __u8 bDescriptorType; Configuration */
+ 0x19, /* __u16 wTotalLength; */
+ 0x00,
+ 0x01, /* __u8 bNumInterfaces; */
+ 0x01, /* __u8 bConfigurationValue; */
+ 0x00, /* __u8 iConfiguration; */
+ 0x40, /* __u8 bmAttributes;
+ * Bit 7: Bus-powered
+ * 6: Self-powered,
+ * 5 Remote-wakwup,
+ * 4..0: resvd
+ */
+ 0x00, /* __u8 MaxPower; */
+ /* interface */
+ 0x09, /* __u8 if_bLength; */
+ 0x04, /* __u8 if_bDescriptorType; Interface */
+ 0x00, /* __u8 if_bInterfaceNumber; */
+ 0x00, /* __u8 if_bAlternateSetting; */
+ 0x01, /* __u8 if_bNumEndpoints; */
+ 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
+ 0x00, /* __u8 if_bInterfaceSubClass; */
+ 0x00, /* __u8 if_bInterfaceProtocol; */
+ 0x00, /* __u8 if_iInterface; */
+ /* endpoint */
+ 0x07, /* __u8 ep_bLength; */
+ 0x05, /* __u8 ep_bDescriptorType; Endpoint */
+ 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
+ 0x03, /* __u8 ep_bmAttributes; Interrupt */
+ 0x02, /* __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
+ 0x00,
+ 0xff, /* __u8 ep_bInterval; 255 ms */
+};
+
+static unsigned char root_hub_str_index0[] = {
+ 0x04, /* __u8 bLength; */
+ 0x03, /* __u8 bDescriptorType; String-descriptor */
+ 0x09, /* __u8 lang ID */
+ 0x04, /* __u8 lang ID */
+};
+
+static unsigned char root_hub_str_index1[] = {
+ 56, /* __u8 bLength; */
+ 0x03, /* __u8 bDescriptorType; String-descriptor */
+ 'u', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ '-', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'b', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'o', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'o', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 't', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ ' ', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'U', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'H', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'C', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'I', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ ' ', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'H', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'o', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 's', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 't', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ ' ', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'C', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'o', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'n', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 't', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'r', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'o', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'l', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'l', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'e', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+ 'r', /* __u8 Unicode */
+ 0, /* __u8 Unicode */
+};
+
+static unsigned char root_hub_hub_des[] = {
+ 0x09, /* __u8 bLength; */
+ 0x29, /* __u8 bDescriptorType; Hub-descriptor */
+ 0x02, /* __u8 bNbrPorts; */
+ 0x00, /* __u16 wHubCharacteristics; */
+ 0x00,
+ 0x01, /* __u8 bPwrOn2pwrGood; 2ms */
+ 0x00, /* __u8 bHubContrCurrent; 0 mA */
+ 0x00, /* __u8 DeviceRemovable; *** 7 Ports max *** */
+ 0xff, /* __u8 PortPwrCtrlMask; *** 7 ports max *** */
+};
+
+/**********************************************************************
+ * some forward decleration
+ */
+static int uhci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
+ void *buffer, int transfer_len,
+ struct devrequest *setup);
+
+static void handle_usb_interrupt(struct uhci_priv *);
+static void usb_check_skel(struct uhci_priv *uhci);
+static void usb_check_int_chain(struct uhci_priv *uhci);
+
+#ifdef USB_UHCI_DEBUG
+static void usb_show_td(struct uhci_priv *, int);
+#endif
+
+/* fill a td with the approproiate data. Link, status, info and buffer
+ * are used by the USB controller itselfes, dev is used to identify the
+ * "connected" device
+ */
+static void usb_fill_td(struct uhci_td *td,
+ unsigned long link,
+ unsigned long status,
+ unsigned long info,
+ void *buffer,
+ unsigned long dev)
+{
+ td->link = swap_32(link);
+ td->status = swap_32(status);
+ td->info = swap_32(info);
+ td->buffer = swap_32(virt_to_phys(buffer));
+ td->dev_ptr = dev;
+}
+
+/* fill a qh with the approproiate data. Head and element are used by the USB
+ * controller itselfes. As soon as a valid dev_ptr is filled, a td chain is
+ * connected to the qh. Please note, that after completion of the td chain, the
+ * entry element is removed / marked invalid by the USB controller.
+ */
+static void usb_fill_qh(struct uhci_qh *qh,
+ unsigned long head,
+ unsigned long element)
+{
+ qh->head = swap_32(head);
+ qh->element = swap_32(element);
+ qh->dev_ptr = 0L;
+}
+
+/* get the status of a td->status
+ */
+static unsigned long usb_uhci_td_stat(unsigned long status)
+{
+ unsigned long result = 0;
+ result |= (status & TD_CTRL_NAK) ? USB_ST_NAK_REC : 0;
+ result |= (status & TD_CTRL_STALLED) ? USB_ST_STALLED : 0;
+ result |= (status & TD_CTRL_DBUFERR) ? USB_ST_BUF_ERR : 0;
+ result |= (status & TD_CTRL_BABBLE) ? USB_ST_BABBLE_DET : 0;
+ result |= (status & TD_CTRL_CRCTIMEO) ? USB_ST_CRC_ERR : 0;
+ result |= (status & TD_CTRL_BITSTUFF) ? USB_ST_BIT_ERR : 0;
+ result |= (status & TD_CTRL_ACTIVE) ? USB_ST_NOT_PROC : 0;
+ return result;
+}
+
+/* get the status and the transfered len of a td chain.
+ * called from the completion handler
+ */
+static int usb_get_td_status(struct uhci_td *td, struct usb_device *dev)
+{
+ struct usb_host *host = dev->host;
+ struct uhci_priv *uhci = container_of(host, struct uhci_priv, host);
+ unsigned long temp, info;
+ unsigned long stat;
+ struct uhci_td *mytd = td;
+
+ if (dev->devnum == uhci->devnum)
+ return 0;
+ dev->act_len = 0;
+ stat = 0;
+ do {
+ temp = swap_32((unsigned long)mytd->status);
+ stat = usb_uhci_td_stat(temp);
+ info = swap_32((unsigned long)mytd->info);
+ if (((info & 0xff) != USB_PID_SETUP) &&
+ (((info >> 21) & 0x7ff) != 0x7ff) &&
+ (temp & 0x7FF) != 0x7ff) {
+ /* if not setup and not null data pack */
+ dev->act_len += (temp & 0x7FF) + 1;
+ }
+ if (stat) { /* status no ok */
+ dev->status = stat;
+ return -1;
+ }
+ temp = swap_32((unsigned long)mytd->link); /*FIXME*/
+ mytd = (struct uhci_td *)(temp & 0xfffffff0);
+ } while ((temp & 0x1) == 0); /* process all TDs */
+ dev->status = stat;
+ return 0; /* Ok */
+}
+
+
+/*-------------------------------------------------------------------
+ * LOW LEVEL STUFF
+ * assembles QHs und TDs for control, bulk and iso
+ *-------------------------------------------------------------------*/
+
+/* Submits a control message. That is a Setup, Data and Status transfer.
+ * Routine does not wait for completion.
+ */
+static int submit_control_msg(struct usb_device *dev,
+ unsigned long pipe,
+ void *buffer,
+ int transfer_len,
+ struct devrequest *setup,
+ int timeout)
+{
+ struct usb_host *host = dev->host;
+ struct uhci_priv *uhci = container_of(host, struct uhci_priv, host);
+ unsigned long destination, status;
+ int maxsze = usb_maxpacket(dev, pipe);
+ void *dataptr;
+ int len, pktsze, i = 0, ret = 0;
+
+ if (!maxsze) {
+ dev_err(&dev->dev, "%s: pipesize for pipe %lx is zero\n",
+ __func__, pipe);
+ return -1;
+ }
+ if (((pipe >> 8) & 0x7f) == uhci->devnum) {
+ /* this is the root hub -> redirect it */
+ return uhci_submit_rh_msg(dev, pipe, buffer,
+ transfer_len, setup);
+ }
+ dev_dbg(&dev->dev, "%s: uhci_submit_control start len %x, maxsize %x\n",
+ __func__, transfer_len, maxsze);
+ /* The "pipe" thing contains the destination in bits 8--18 */
+ destination = (pipe & PIPE_DEVEP_MASK) | USB_PID_SETUP; /*Setup stage*/
+ /* 3 errors */
+ status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | (3 << 27);
+ /* Build the TD for the control request, try forever, 8 bytes of data*/
+ if (setup)
+ dma_sync_single_for_device((unsigned long)setup, sizeof(*setup),
+ DMA_TO_DEVICE);
+ usb_fill_td(&uhci->tmp_td[i], UHCI_PTR_TERM, status,
+ destination | (7 << 21),
+ setup,
+ (unsigned long)dev);
+ if (buffer)
+ dma_sync_single_for_device((unsigned long)buffer, transfer_len,
+ DMA_TO_DEVICE);
+ dataptr = buffer;
+ len = transfer_len;
+
+ /* If direction is "send", change the frame from SETUP (0x2D)
+ to OUT (0xE1). Else change it from SETUP to IN (0x69). */
+ destination = (pipe & PIPE_DEVEP_MASK) |
+ ((pipe & USB_DIR_IN) == 0 ? USB_PID_OUT : USB_PID_IN);
+ while (len > 0) {
+ /* data stage */
+ pktsze = len;
+ i++;
+ if (pktsze > maxsze)
+ pktsze = maxsze;
+ destination ^= 1 << TD_TOKEN_TOGGLE; /* toggle DATA0/1 */
+ usb_fill_td(&uhci->tmp_td[i], UHCI_PTR_TERM, status,
+ destination | ((pktsze - 1) << 21),
+ dataptr,
+ (unsigned long)dev);/*Status, pktsze bytes of data*/
+ uhci->tmp_td[i-1].link = swap_32(uhci->tmp_td_dma +
+ i * sizeof(struct uhci_td));
+
+ dataptr += pktsze;
+ len -= pktsze;
+ }
+
+ /* Build the final TD for control status */
+ /* It's only IN if the pipe is out AND we aren't expecting data */
+
+ destination &= ~UHCI_PID;
+ if (((pipe & USB_DIR_IN) == 0) || (transfer_len == 0))
+ destination |= USB_PID_IN;
+ else
+ destination |= USB_PID_OUT;
+ destination |= 1 << TD_TOKEN_TOGGLE; /* End in Data1 */
+ i++;
+ status &= ~TD_CTRL_SPD;
+ /* no limit on errors on final packet , 0 bytes of data */
+ usb_fill_td(&uhci->tmp_td[i], UHCI_PTR_TERM,
+ status | TD_CTRL_IOC,
+ destination | (UHCI_NULL_DATA_SIZE << 21),
+ 0, (unsigned long)dev);
+ /* queue status td */
+ uhci->tmp_td[i-1].link = swap_32(uhci->tmp_td_dma +
+ i * sizeof(struct uhci_td));
+ dev_dbg(&dev->dev, "%s end (%d tmp_tds used)\n", __func__, i);
+ /* first mark the control QH element terminated */
+ uhci->qh_cntrl->element = 0xffffffffL;
+ /* set qh active */
+ uhci->qh_cntrl->dev_ptr = (unsigned long)dev;
+ /* fill in tmp_td_chain */
+ uhci->qh_cntrl->element = swap_32(uhci->tmp_td_dma);
+
+ handle_usb_interrupt(uhci);
+
+ if (buffer)
+ dma_sync_single_for_cpu((unsigned long)buffer, transfer_len,
+ DMA_FROM_DEVICE);
+ usb_check_skel(uhci);
+ return ret;
+}
+
+/*-------------------------------------------------------------------
+ * Prepare TDs for bulk transfers.
+ */
+static int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
+ void *buffer, int transfer_len, int timeout)
+{
+ struct usb_host *host = dev->host;
+ struct uhci_priv *uhci = container_of(host, struct uhci_priv, host);
+ unsigned long destination, status, info;
+ void *dataptr;
+ int maxsze = usb_maxpacket(dev, pipe);
+ int len;
+ int i = 0;
+
+ if (transfer_len < 0) {
+ printf("Negative transfer length in submit_bulk\n");
+ return -1;
+ }
+ if (!maxsze)
+ return -1;
+ /* The "pipe" thing contains the destination in bits 8--18. */
+ destination = (pipe & PIPE_DEVEP_MASK) | usb_packetid(pipe);
+ /* 3 errors */
+ status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | (3 << 27);
+ /* Build the TDs for the bulk request */
+ len = transfer_len;
+ if (buffer)
+ dma_sync_single_for_device((unsigned long)buffer, transfer_len,
+ DMA_TO_DEVICE);
+ dataptr = buffer;
+ do {
+ int pktsze = len;
+ if (pktsze > maxsze)
+ pktsze = maxsze;
+ /* pktsze bytes of data */
+ info = destination |
+ (((pktsze - 1)&UHCI_NULL_DATA_SIZE) << 21) |
+ (usb_gettoggle(dev,
+ usb_pipeendpoint(pipe),
+ usb_pipeout(pipe)) << TD_TOKEN_TOGGLE);
+
+ if ((len - pktsze) == 0)
+ status |= TD_CTRL_IOC;
+
+ usb_fill_td(&uhci->tmp_td[i],
+ UHCI_PTR_TERM,
+ status,
+ info,
+ dataptr,
+ (unsigned long)dev);
+ if (i > 0)
+ uhci->tmp_td[i-1].link = swap_32(uhci->tmp_td_dma +
+ i * sizeof(struct uhci_td));
+ i++;
+ dataptr += pktsze;
+ len -= pktsze;
+ usb_dotoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
+ } while (len > 0);
+ /* first mark the bulk QH element terminated */
+ uhci->qh_bulk->element = 0xffffffffL;
+ /* set qh active */
+ uhci->qh_bulk->dev_ptr = (unsigned long)dev;
+ /* fill in tmp_td_chain */
+ uhci->qh_bulk->element = swap_32(uhci->tmp_td_dma);
+
+ handle_usb_interrupt(uhci);
+
+ if (buffer)
+ dma_sync_single_for_cpu((unsigned long)buffer, transfer_len,
+ DMA_FROM_DEVICE);
+
+ usb_check_skel(uhci);
+
+ return 0;
+}
+
+
+/*
+ * search a free interrupt td
+ */
+static struct uhci_td *uhci_alloc_int_td(struct uhci_priv *uhci)
+{
+ return &uhci->tmp_int_td[0];
+
+}
+
+/*
+ * submits USB interrupt (ie. polling ;-)
+ */
+static int submit_int_msg(struct usb_device *dev,
+ unsigned long pipe,
+ void *buffer,
+ int transfer_len,
+ int interval)
+{
+ struct usb_host *host = dev->host;
+ struct uhci_priv *uhci = container_of(host, struct uhci_priv, host);
+ int nint, n;
+ unsigned long status, destination;
+ unsigned long info, tmp;
+ struct uhci_td *mytd;
+
+ if (interval < 0 || interval >= 256)
+ return -1;
+
+ if (interval == 0) {
+ nint = 0;
+ } else {
+ /* round interval down to 2^n */
+ for (nint = 0, n = 1; nint <= 8; nint++, n += n) {
+ if (interval < n) {
+ interval = n / 2;
+ break;
+ }
+ }
+ nint--;
+ }
+
+ dev_dbg(&dev->dev, "%s: Rounded interval to %i, chain %i\n",
+ __func__, interval, nint);
+ mytd = uhci_alloc_int_td(uhci);
+ if (mytd == NULL) {
+ printf("No free INT TDs found\n");
+ return -1;
+ }
+ status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | TD_CTRL_IOC | (3 << 27);
+
+ destination = (pipe & PIPE_DEVEP_MASK) |
+ usb_packetid(pipe) |
+ (((transfer_len - 1) & 0x7ff) << 21);
+
+ info = destination |
+ (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))
+ << TD_TOKEN_TOGGLE);
+ tmp = swap_32(uhci->td_int[nint].link); /* FIXME */
+ if (buffer)
+ dma_sync_single_for_device((unsigned long)buffer, transfer_len,
+ DMA_TO_DEVICE);
+ usb_fill_td(mytd, tmp, status, info, buffer, (unsigned long)dev);
+ /* Link it */
+ tmp = swap_32((unsigned long)virt_to_phys(mytd));
+ uhci->td_int[nint].link = tmp;
+
+ usb_dotoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
+
+ handle_usb_interrupt(uhci);
+
+ if (buffer)
+ dma_sync_single_for_cpu((unsigned long)buffer, transfer_len,
+ DMA_FROM_DEVICE);
+
+ usb_check_int_chain(uhci);
+
+ return 0;
+}
+/**********************************************************************
+ * Low Level functions
+ */
+
+
+static void reset_hc(struct uhci_priv *uhci)
+{
+
+ /* Global reset for 100ms */
+ writew(0x0204, uhci->base_addr + USBPORTSC1);
+ writew(0x0204, uhci->base_addr + USBPORTSC2);
+ writew(USBCMD_GRESET | USBCMD_RS, uhci->base_addr + USBCMD);
+ /* Turn off all interrupts */
+ writew(0, uhci->base_addr + USBINTR);
+ mdelay(50);
+ writew(0, uhci->base_addr + USBCMD);
+ mdelay(10);
+}
+
+static int start_hc(struct uhci_priv *uhci)
+{
+ int timeout = 1000;
+
+ while (readw(uhci->base_addr + USBCMD) & USBCMD_HCRESET) {
+ if (!--timeout) {
+ printf("USBCMD_HCRESET timed out!\n");
+ return -ETIMEDOUT;
+ }
+ }
+ /* Turn on all interrupts */
+ writew(USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP,
+ uhci->base_addr + USBINTR);
+ /* Start at frame 0 */
+ writew(0, uhci->base_addr + USBFRNUM);
+ /* set Framebuffer base address */
+ writel(uhci->framelist_dma, uhci->base_addr + USBFLBASEADD);
+ /* Run and mark it configured with a 64-byte max packet */
+ writew(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, uhci->base_addr + USBCMD);
+ return 0;
+}
+
+/* Initialize the skeleton
+ */
+static void usb_init_skel(struct uhci_priv *uhci)
+{
+ unsigned long temp;
+ int n;
+
+ for (n = 0; n < USB_MAX_TEMP_INT_TD; n++)
+ uhci->tmp_int_td[n].dev_ptr = 0L; /* no devices connected */
+ /* last td */
+ usb_fill_td(uhci->td_last, UHCI_PTR_TERM, 0, 0, 0, 0L);
+ /* usb_fill_td(&td_last,UHCI_PTR_TERM,0,0,0); */
+ /* End Queue Header */
+ usb_fill_qh(uhci->qh_end, UHCI_PTR_TERM, uhci->td_last_dma);
+ /* Bulk Queue Header */
+ temp = uhci->qh_end_dma;
+ usb_fill_qh(uhci->qh_bulk, temp | UHCI_PTR_QH, UHCI_PTR_TERM);
+ /* Control Queue Header */
+ temp = uhci->qh_bulk_dma;
+ usb_fill_qh(uhci->qh_cntrl, temp | UHCI_PTR_QH, UHCI_PTR_TERM);
+ /* 1ms Interrupt td */
+ temp = uhci->qh_cntrl_dma;
+ usb_fill_td(&uhci->td_int[0], temp | UHCI_PTR_QH, 0, 0, 0, 0L);
+ temp = uhci->td_int_dma;
+ for (n = 1; n < 8; n++)
+ usb_fill_td(&uhci->td_int[n], temp, 0, 0, 0, 0L);
+ for (n = 0; n < 1024; n++) {
+ /* link all framelist pointers to one of the interrupts */
+ int m, o;
+ if ((n & 127) == 127)
+ uhci->framelist[n] = swap_32(uhci->td_int_dma);
+ else
+ for (o = 1, m = 2; m <= 128; o++, m += m)
+ if ((n & (m - 1)) == ((m - 1) / 2))
+ uhci->framelist[n] =
+ swap_32(uhci->td_int_dma +
+ o * sizeof(struct uhci_td));
+ }
+}
+
+/* check the common skeleton for completed transfers, and update the status
+ * of the "connected" device. Called from the IRQ routine.
+ */
+static void usb_check_skel(struct uhci_priv *uhci)
+{
+ struct usb_device *dev;
+ /* start with the control qh */
+ if (uhci->qh_cntrl->dev_ptr != 0) {
+ /* it's a device assigned check if this caused IRQ */
+ dev = (struct usb_device *)uhci->qh_cntrl->dev_ptr;
+ usb_get_td_status(&uhci->tmp_td[0], dev); /* update status */
+ if (!(dev->status & USB_ST_NOT_PROC))
+ /* is not active anymore, disconnect devices */
+ uhci->qh_cntrl->dev_ptr = 0;
+ }
+ /* now process the bulk */
+ if (uhci->qh_bulk->dev_ptr != 0) {
+ /* it's a device assigned check if this caused IRQ */
+ dev = (struct usb_device *)uhci->qh_bulk->dev_ptr;
+ usb_get_td_status(&uhci->tmp_td[0], dev); /* update status */
+ if (!(dev->status & USB_ST_NOT_PROC))
+ /* is not active anymore, disconnect devices */
+ uhci->qh_bulk->dev_ptr = 0;
+ }
+}
+
+/* check the interrupt chain, ubdate the status of the appropriate device,
+ * call the appropriate irqhandler and reactivate the TD if the irqhandler
+ * returns with 1
+ */
+static void usb_check_int_chain(struct uhci_priv *uhci)
+{
+ int i;
+ unsigned long link, status;
+ struct uhci_td *td, *prevtd;
+
+ for (i = 0; i < 8; i++) {
+ /* the first previous td is the skeleton td */
+ prevtd = &uhci->td_int[i];
+ /* next in chain */
+ link = swap_32(uhci->td_int[i].link) & 0xfffffff0; /*FIXME*/
+ /* assign it */
+ td = (struct uhci_td *)link; /*FIXME*/
+
+ /* all interrupt TDs are finally linked to the td_int[0].
+ * so we process all until we find the td_int[0].
+ * if int0 chain points to a QH, we're also done
+ */
+ /*FIXME*/
+ while (((i > 0) && (link != virt_to_phys(&uhci->td_int[0]))) ||
+ ((i == 0) && !(swap_32(td->link) & UHCI_PTR_QH))) {
+ /* check if a device is assigned with this td */
+ status = swap_32(td->status);
+ if ((td->dev_ptr != 0L) && !(status & TD_CTRL_ACTIVE)) {
+ prevtd->link = td->link;
+ /* remove device pointer */
+ td->dev_ptr = 0L;
+ } /* if we call the irq handler */
+ link = swap_32(td->link) & 0xfffffff0; /*next in chain*/
+ td = (struct uhci_td *)link; /* assign it */
+ } /* process all td in this int chain */
+ }
+}
+
+/* usb interrupt service routine.
+ */
+static void handle_usb_interrupt(struct uhci_priv *uhci)
+{
+ unsigned short status;
+ int tout = 1000;
+ /*
+ * Read the interrupt status, and write it back to clear the
+ * interrupt cause
+ */
+ do {
+ mdelay(1);
+ status = readw(uhci->base_addr + USBSTS);
+ if (--tout == 0) {
+ dev_err(uhci->dev, "TIMEOUT\n");
+ break;
+ }
+
+ } while (!status);
+
+
+ if (status != 1) {
+ /* remove host controller halted state */
+ if ((status & 0x20) &&
+ ((readw(uhci->base_addr + USBCMD) && USBCMD_RS) == 0)) {
+ writew(USBCMD_RS | readw(uhci->base_addr + USBCMD),
+ uhci->base_addr + USBCMD);
+ }
+ }
+
+ writew(status, uhci->base_addr + USBSTS);
+ status = readw(uhci->base_addr + USBSTS);
+}
+
+/* init uhci
+ */
+static int usb_lowlevel_init(struct usb_host *host)
+{
+ struct uhci_priv *uhci = container_of(host, struct uhci_priv, host);
+
+ usb_init_skel(uhci);
+ reset_hc(uhci);
+ start_hc(uhci);
+ return 0;
+}
+
+/*
+ * stop uhci
+ */
+static int usb_lowlevel_stop(struct uhci_priv *uhci)
+{
+ reset_hc(uhci);
+ return 0;
+}
+
+/*
+ * Virtual Root Hub
+ * Since the uhci does not have a real HUB, we simulate one ;-)
+ */
+#undef USB_RH_DEBUG
+
+#ifdef USB_RH_DEBUG
+#define USB_RH_PRINTF(fmt, args...) printf(fmt, ##args)
+static void usb_display_wValue(unsigned short wValue, unsigned short wIndex);
+static void usb_display_Req(unsigned short req);
+#else
+#define USB_RH_PRINTF(fmt, args...)
+static void usb_display_wValue(unsigned short wValue, unsigned short wIndex) {}
+static void usb_display_Req(unsigned short req) {}
+#endif
+
+/*
+ * Root Hub Control Pipe (interrupt Pipes are not supported)
+ */
+static int uhci_submit_rh_msg(struct usb_device *dev,
+ unsigned long pipe,
+ void *buffer,
+ int transfer_len,
+ struct devrequest *cmd)
+{
+ struct usb_host *host = dev->host;
+ struct uhci_priv *uhci = container_of(host, struct uhci_priv, host);
+ void *data = buffer;
+ int leni = transfer_len;
+ int len = 0;
+ int status = 0;
+ int stat = 0;
+ int i;
+
+ uint16_t pstatus, pchange;
+
+ unsigned short bmRType_bReq;
+ unsigned short wValue;
+ unsigned short wIndex;
+ unsigned short wLength;
+
+ if (usb_pipeint(pipe)) {
+ printf("Root-Hub submit IRQ: NOT implemented\n");
+ return 0;
+ }
+ bmRType_bReq = cmd->requesttype | cmd->request << 8;
+ wValue = swap_16(cmd->value);
+ wIndex = swap_16(cmd->index);
+ wLength = swap_16(cmd->length);
+ usb_display_Req(bmRType_bReq);
+ for (i = 0; i < 8; i++)
+ uhci->c_p_r[i] = 0;
+ USB_RH_PRINTF("Root-Hub: adr: %2x cmd(%1x): %02x%02x %04x %04x %04x\n",
+ dev->devnum, 8, cmd->requesttype, cmd->request,
+ wValue, wIndex, wLength);
+
+ switch (bmRType_bReq) {
+ /* Request Destination:
+ without flags: Device,
+ RH_INTERFACE: interface,
+ RH_ENDPOINT: endpoint,
+ RH_CLASS means HUB here,
+ RH_OTHER | RH_CLASS almost ever means HUB_PORT here
+ */
+
+ case RH_GET_STATUS:
+ *(unsigned short *)data = swap_16(1);
+ len = 2;
+ break;
+ case RH_GET_STATUS | RH_INTERFACE:
+ *(unsigned short *)data = swap_16(0);
+ len = 2;
+ break;
+ case RH_GET_STATUS | RH_ENDPOINT:
+ *(unsigned short *)data = swap_16(0);
+ len = 2;
+ break;
+ case RH_GET_STATUS | RH_CLASS:
+ *(unsigned long *)data = swap_32(0);
+ len = 4;
+ break; /* hub power ** */
+ case RH_GET_STATUS | RH_OTHER | RH_CLASS:
+ mdelay(100);
+ status = readw(uhci->base_addr + USBPORTSC1 + 2 * (wIndex - 1));
+ pchange = 0;
+ if (status & USBPORTSC_CSC)
+ pchange |= USB_PORT_STAT_C_CONNECTION;
+ if (status & USBPORTSC_PEC)
+ pchange |= USB_PORT_STAT_C_ENABLE;
+
+ /* Ignore overcurrent */
+
+ /* UHCI has no power switching (always on) */
+ pstatus = USB_PORT_STAT_POWER;
+ if (status & USBPORTSC_CCS)
+ pstatus |= USB_PORT_STAT_CONNECTION;
+ if (status & USBPORTSC_PE) {
+ pstatus |= USB_PORT_STAT_ENABLE;
+ if (status & (USBPORTSC_SUSP | USBPORTSC_RD))
+ pstatus |= USB_PORT_STAT_SUSPEND;
+ }
+ if (status & USBPORTSC_PR)
+ pstatus |= USB_PORT_STAT_RESET;
+ if (status & USBPORTSC_LSDA)
+ pstatus |= USB_PORT_STAT_LOW_SPEED;
+
+ *(unsigned short *)data = swap_16(pstatus);
+ *(unsigned short *)(data + 2) = swap_16(pchange);
+ len = 4;
+ break;
+ case RH_CLEAR_FEATURE | RH_ENDPOINT:
+ switch (wValue) {
+ case (RH_ENDPOINT_STALL):
+ len = 0;
+ break;
+ }
+ break;
+
+ case RH_CLEAR_FEATURE | RH_CLASS:
+ switch (wValue) {
+ case (RH_C_HUB_OVER_CURRENT):
+ len = 0; /* hub power over current ** */
+ break;
+ }
+ break;
+
+ case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
+ usb_display_wValue(wValue, wIndex);
+ switch (wValue) {
+ case (RH_PORT_ENABLE):
+ status = readw(uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ status = (status & 0xfff5) & ~USBPORTSC_PE;
+ writew(status, uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ len = 0;
+ break;
+ case (RH_PORT_SUSPEND):
+ status = readw(uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ status = (status & 0xfff5) & ~USBPORTSC_SUSP;
+ writew(status, uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ len = 0;
+ break;
+ case (RH_PORT_POWER):
+ len = 0; /* port power ** */
+ break;
+ case (RH_C_PORT_CONNECTION):
+ status = readw(uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ status = (status & 0xfff5) | USBPORTSC_CSC;
+ writew(status,
+ uhci->base_addr + USBPORTSC1 + 2 * (wIndex - 1));
+ len = 0;
+ break;
+ case (RH_C_PORT_ENABLE):
+ status = readw(uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ status = (status & 0xfff5) | USBPORTSC_PEC;
+ writew(status,
+ uhci->base_addr + USBPORTSC1 + 2 * (wIndex - 1));
+ len = 0;
+ break;
+ case (RH_C_PORT_SUSPEND):
+/*** WR_RH_PORTSTAT(RH_PS_PSSC); */
+ len = 0;
+ break;
+ case (RH_C_PORT_OVER_CURRENT):
+ len = 0;
+ break;
+ case (RH_C_PORT_RESET):
+ uhci->c_p_r[wIndex - 1] = 0;
+ len = 0;
+ break;
+ }
+ break;
+ case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
+ usb_display_wValue(wValue, wIndex);
+ switch (wValue) {
+ case (RH_PORT_SUSPEND):
+ status = readw(uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ status = (status & 0xfff5) | USBPORTSC_SUSP;
+ writew(status, uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ len = 0;
+ break;
+ case (RH_PORT_RESET):
+ status = readw(uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ status = (status & 0xfff5) | USBPORTSC_PR;
+ writew(status, uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ mdelay(10);
+ status = (status & 0xfff5) & ~USBPORTSC_PR;
+ writew(status, uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ udelay(10);
+ status = (status & 0xfff5) | USBPORTSC_PE;
+ writew(status, uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ mdelay(10);
+ status = (status & 0xfff5) | 0xa;
+ writew(status, uhci->base_addr + USBPORTSC1 +
+ 2 * (wIndex - 1));
+ len = 0;
+ break;
+ case (RH_PORT_POWER):
+ len = 0; /* port power ** */
+ break;
+ case (RH_PORT_ENABLE):
+ status = readw(uhci->base_addr+USBPORTSC1+2*(wIndex-1));
+ status = (status & 0xfff5) | USBPORTSC_PE;
+ writew(status, uhci->base_addr+USBPORTSC1+2*(wIndex-1));
+ len = 0;
+ break;
+ }
+ break;
+
+ case RH_SET_ADDRESS:
+ uhci->devnum = wValue;
+ len = 0;
+ break;
+ case RH_GET_DESCRIPTOR:
+ switch ((wValue & 0xff00) >> 8) {
+ case (0x01): /* device descriptor */
+ i = sizeof(root_hub_dev_des);
+ status = i > wLength ? wLength : i;
+ len = leni > status ? status : leni;
+ memcpy(data, root_hub_dev_des, len);
+ break;
+ case (0x02): /* configuration descriptor */
+ i = sizeof(root_hub_config_des);
+ status = i > wLength ? wLength : i;
+ len = leni > status ? status : leni;
+ memcpy(data, root_hub_config_des, len);
+ break;
+ case (0x03): /*string descriptors */
+ if (wValue == 0x0300) {
+ i = sizeof(root_hub_str_index0);
+ status = i > wLength ? wLength : i;
+ len = leni > status ? status : leni;
+ memcpy(data, root_hub_str_index0, len);
+ break;
+ }
+ if (wValue == 0x0301) {
+ i = sizeof(root_hub_str_index1);
+ status = i > wLength ? wLength : i;
+ len = leni > status ? status : leni;
+ memcpy(data, root_hub_str_index1, len);
+ break;
+ }
+ stat = USB_ST_STALLED;
+ }
+ break;
+
+ case RH_GET_DESCRIPTOR | RH_CLASS:
+ root_hub_hub_des[2] = 2;
+ i = sizeof(root_hub_hub_des);
+ status = i > wLength ? wLength : i;
+ len = leni > status ? status : leni;
+ memcpy(data, root_hub_hub_des, len);
+ break;
+ case RH_GET_CONFIGURATION:
+ *(unsigned char *) data = 0x01;
+ len = 1;
+ break;
+ case RH_SET_CONFIGURATION:
+ len = 0;
+ break;
+ default:
+ stat = USB_ST_STALLED;
+ }
+ USB_RH_PRINTF("Root-Hub stat %lx port1: %x port2: %x\n\n",
+ stat,
+ readw(uhci->base_addr + USBPORTSC1),
+ readw(uhci->base_addr + USBPORTSC2));
+ dev->act_len = len;
+ dev->status = stat;
+ return stat;
+
+}
+
+/*
+ * Some Debug Routines
+ */
+#ifdef USB_RH_DEBUG
+static void usb_display_Req(unsigned short req)
+{
+ USB_RH_PRINTF("- Root-Hub Request: ");
+ switch (req) {
+ case RH_GET_STATUS:
+ USB_RH_PRINTF("Get Status ");
+ break;
+ case RH_GET_STATUS | RH_INTERFACE:
+ USB_RH_PRINTF("Get Status Interface ");
+ break;
+ case RH_GET_STATUS | RH_ENDPOINT:
+ USB_RH_PRINTF("Get Status Endpoint ");
+ break;
+ case RH_GET_STATUS | RH_CLASS:
+ USB_RH_PRINTF("Get Status Class");
+ break; /* hub power ** */
+ case RH_GET_STATUS | RH_OTHER | RH_CLASS:
+ USB_RH_PRINTF("Get Status Class Others");
+ break;
+ case RH_CLEAR_FEATURE | RH_ENDPOINT:
+ USB_RH_PRINTF("Clear Feature Endpoint ");
+ break;
+ case RH_CLEAR_FEATURE | RH_CLASS:
+ USB_RH_PRINTF("Clear Feature Class ");
+ break;
+ case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
+ USB_RH_PRINTF("Clear Feature Other Class ");
+ break;
+ case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
+ USB_RH_PRINTF("Set Feature Other Class ");
+ break;
+ case RH_SET_ADDRESS:
+ USB_RH_PRINTF("Set Address ");
+ break;
+ case RH_GET_DESCRIPTOR:
+ USB_RH_PRINTF("Get Descriptor ");
+ break;
+ case RH_GET_DESCRIPTOR | RH_CLASS:
+ USB_RH_PRINTF("Get Descriptor Class ");
+ break;
+ case RH_GET_CONFIGURATION:
+ USB_RH_PRINTF("Get Configuration ");
+ break;
+ case RH_SET_CONFIGURATION:
+ USB_RH_PRINTF("Get Configuration ");
+ break;
+ default:
+ USB_RH_PRINTF("****UNKNOWN**** 0x%04X ", req);
+ }
+ USB_RH_PRINTF("\n");
+
+}
+
+static void usb_display_wValue(unsigned short wValue, unsigned short wIndex)
+{
+ switch (wValue) {
+ case (RH_PORT_ENABLE):
+ USB_RH_PRINTF("Root-Hub: Enable Port %d\n", wIndex);
+ break;
+ case (RH_PORT_SUSPEND):
+ USB_RH_PRINTF("Root-Hub: Suspend Port %d\n", wIndex);
+ break;
+ case (RH_PORT_POWER):
+ USB_RH_PRINTF("Root-Hub: Port Power %d\n", wIndex);
+ break;
+ case (RH_C_PORT_CONNECTION):
+ USB_RH_PRINTF("Root-Hub: C Port Connection Port %d\n",
+ wIndex);
+ break;
+ case (RH_C_PORT_ENABLE):
+ USB_RH_PRINTF("Root-Hub: C Port Enable Port %d\n",
+ wIndex);
+ break;
+ case (RH_C_PORT_SUSPEND):
+ USB_RH_PRINTF("Root-Hub: C Port Suspend Port %d\n",
+ wIndex);
+ break;
+ case (RH_C_PORT_OVER_CURRENT):
+ USB_RH_PRINTF("Root-Hub: C Port Over Current Port %d\n",
+ wIndex);
+ break;
+ case (RH_C_PORT_RESET):
+ USB_RH_PRINTF("Root-Hub: C Port reset Port %d\n",
+ wIndex);
+ break;
+ default:
+ USB_RH_PRINTF("Root-Hub: unknown %x %x\n",
+ wValue, wIndex);
+ break;
+ }
+}
+#endif
+
+#ifdef USB_UHCI_DEBUG
+static int usb_display_td(struct uhci_td *td)
+{
+ unsigned long tmp;
+ int valid;
+
+ printf("TD at %p:\n", td);
+ tmp = swap_32(td->link);
+ printf("Link points to 0x%08lX, %s first, %s, %s\n", tmp & 0xfffffff0,
+ ((tmp & 0x4) == 0x4) ? "Depth" : "Breath",
+ ((tmp & 0x2) == 0x2) ? "QH" : "TD",
+ ((tmp & 0x1) == 0x1) ? "invalid" : "valid");
+ valid = ((tmp & 0x1) == 0x0);
+ tmp = swap_32(td->status);
+ printf(" %s %ld Errors %s %s %s\n %s %s %s %s %s %s\n Len 0x%lX\n",
+ (((tmp >> 29) & 0x1) == 0x1) ? "SPD Enable" : "SPD Disable",
+ ((tmp >> 28) & 0x3),
+ (((tmp >> 26) & 0x1) == 0x1) ? "Low Speed" : "Full Speed",
+ (((tmp >> 25) & 0x1) == 0x1) ? "ISO " : "",
+ (((tmp >> 24) & 0x1) == 0x1) ? "IOC " : "",
+ (((tmp >> 23) & 0x1) == 0x1) ? "Active " : "Inactive ",
+ (((tmp >> 22) & 0x1) == 0x1) ? "Stalled" : "",
+ (((tmp >> 21) & 0x1) == 0x1) ? "Data Buffer Error" : "",
+ (((tmp >> 20) & 0x1) == 0x1) ? "Babble" : "",
+ (((tmp >> 19) & 0x1) == 0x1) ? "NAK" : "",
+ (((tmp >> 18) & 0x1) == 0x1) ? "Bitstuff Error" : "",
+ (tmp & 0x7ff));
+ tmp = swap_32(td->info);
+ printf(" MaxLen 0x%lX\n", ((tmp >> 21) & 0x7FF));
+ printf(" %s Endpoint 0x%lX Dev Addr 0x%lX PID 0x%lX\n",
+ ((tmp >> 19) & 0x1) == 0x1 ? "TOGGLE" : "",
+ ((tmp >> 15) & 0xF), ((tmp >> 8) & 0x7F), tmp & 0xFF);
+ tmp = swap_32(td->buffer);
+ printf(" Buffer 0x%08lX\n", tmp);
+ printf(" DEV %08lX\n", td->dev_ptr);
+ return valid;
+}
+
+static void usb_show_td(struct uhci_priv *uhci, int max)
+{
+ int i;
+
+ if (max > 0) {
+ for (i = 0; i < max; i++)
+ usb_display_td(&uhci->tmp_td[i]);
+ } else {
+ i = 0;
+ do {
+ printf("tmp_td[%d]\n", i);
+ } while (usb_display_td(&uhci->tmp_td[i++]));
+ }
+}
+#endif
+
+static int uhci_detect(struct device_d *dev)
+{
+ struct uhci_priv *uhci = dev->priv;
+
+ return usb_host_detect(&uhci->host);
+}
+
+static int uhci_probe(struct device_d *dev)
+{
+ struct uhci_priv *uhci;
+ struct usb_host *host;
+ void *base_addr;
+ struct device_node *dn = dev->device_node, *companion;
+ struct device_d *comp_dev;
+
+ if (dn) {
+ companion = of_parse_phandle(dn, "companion", 0);
+ if (companion) {
+ comp_dev = of_find_device_by_node(companion);
+ if (!comp_dev || !comp_dev->priv)
+ return -EPROBE_DEFER;
+ }
+ }
+
+ base_addr = dev_request_mem_region(dev, 0);
+ if (IS_ERR(base_addr))
+ return PTR_ERR(base_addr);
+
+ uhci = xzalloc(sizeof(struct uhci_priv));
+ dev->priv = uhci;
+ uhci->dev = dev;
+ uhci->base_addr = base_addr;
+
+ uhci->framelist = dma_alloc_coherent(4 * 1024, &uhci->framelist_dma);
+ uhci->tmp_td = dma_alloc_coherent(USB_MAX_TEMP_TD *
+ sizeof(struct uhci_td),
+ &uhci->tmp_td_dma);
+ uhci->tmp_int_td = dma_alloc_coherent(USB_MAX_TEMP_INT_TD *
+ sizeof(struct uhci_td),
+ &uhci->tmp_int_td_dma);
+ uhci->td_int = dma_alloc_coherent(8 * sizeof(struct uhci_td),
+ &uhci->td_int_dma);
+ uhci->qh_cntrl = dma_alloc_coherent(sizeof(struct uhci_qh),
+ &uhci->qh_cntrl_dma);
+ uhci->qh_bulk = dma_alloc_coherent(sizeof(struct uhci_qh),
+ &uhci->qh_bulk_dma);
+ uhci->qh_end = dma_alloc_coherent(sizeof(struct uhci_qh),
+ &uhci->qh_end_dma);
+ uhci->td_last = dma_alloc_coherent(sizeof(struct uhci_td),
+ &uhci->td_last_dma);
+ host = &uhci->host;
+ host->hw_dev = dev;
+
+ host->init = usb_lowlevel_init;
+ host->submit_control_msg = submit_control_msg;
+ host->submit_int_msg = submit_int_msg;
+ host->submit_bulk_msg = submit_bulk_msg;
+ dev->detect = uhci_detect;
+
+ return usb_register_host(host);
+}
+
+static void uhci_remove(struct device_d *dev)
+{
+ struct uhci_priv *uhci = dev->priv;
+
+ usb_lowlevel_stop(uhci);
+}
+
+static __maybe_unused struct of_device_id uhci_platform_dt_ids[] = {
+ {
+ .compatible = "generic-uhci",
+ }, {
+ /* sentinel */
+ }
+};
+
+static struct driver_d uhci_driver = {
+ .name = "uhci",
+ .probe = uhci_probe,
+ .remove = uhci_remove,
+ .of_compatible = DRV_OF_COMPAT(uhci_platform_dt_ids),
+};
+device_platform_driver(uhci_driver);
diff --git a/drivers/usb/host/uhci-hcd.h b/drivers/usb/host/uhci-hcd.h
new file mode 100644
index 0000000..b26f506
--- /dev/null
+++ b/drivers/usb/host/uhci-hcd.h
@@ -0,0 +1,165 @@
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * Note: Part of this code has been derived from linux
+ */
+#ifndef _USB_UHCI_H_
+#define _USB_UHCI_H_
+
+
+/* Command register */
+#define USBCMD 0
+#define USBCMD_RS 0x0001 /* Run/Stop */
+#define USBCMD_HCRESET 0x0002 /* Host reset */
+#define USBCMD_GRESET 0x0004 /* Global reset */
+#define USBCMD_EGSM 0x0008 /* Global Suspend Mode */
+#define USBCMD_FGR 0x0010 /* Force Global Resume */
+#define USBCMD_SWDBG 0x0020 /* SW Debug mode */
+#define USBCMD_CF 0x0040 /* Config Flag (sw only) */
+#define USBCMD_MAXP 0x0080 /* Max Packet (0 = 32, 1 = 64) */
+
+/* Status register */
+#define USBSTS 2
+#define USBSTS_USBINT 0x0001 /* Interrupt due to IOC */
+#define USBSTS_ERROR 0x0002 /* Interrupt due to error */
+#define USBSTS_RD 0x0004 /* Resume Detect */
+#define USBSTS_HSE 0x0008 /* Host System Error */
+#define USBSTS_HCPE 0x0010 /* Host Controller Process Error */
+#define USBSTS_HCH 0x0020 /* HC Halted */
+
+/* Interrupt enable register */
+#define USBINTR 4
+#define USBINTR_TIMEOUT 0x0001 /* Timeout/CRC error enable */
+#define USBINTR_RESUME 0x0002 /* Resume interrupt enable */
+#define USBINTR_IOC 0x0004 /* Interrupt On Complete enable */
+#define USBINTR_SP 0x0008 /* Short packet interrupt enable */
+
+#define USBFRNUM 6
+#define USBFLBASEADD 8
+#define USBSOF 12
+
+/* USB port status and control registers */
+#define USBPORTSC1 16
+#define USBPORTSC2 18
+#define USBPORTSC_CCS 0x0001 /* Current Connect Status */
+#define USBPORTSC_CSC 0x0002 /* Connect Status Change */
+#define USBPORTSC_PE 0x0004 /* Port Enable */
+#define USBPORTSC_PEC 0x0008 /* Port Enable Change */
+#define USBPORTSC_LS 0x0030 /* Line Status */
+#define USBPORTSC_RD 0x0040 /* Resume Detect */
+#define USBPORTSC_LSDA 0x0100 /* Low Speed Device Attached */
+#define USBPORTSC_PR 0x0200 /* Port Reset */
+#define USBPORTSC_SUSP 0x1000 /* Suspend */
+
+/* Legacy support register */
+#define USBLEGSUP 0xc0
+#define USBLEGSUP_DEFAULT 0x2000 /* only PIRQ enable set */
+
+#define UHCI_NULL_DATA_SIZE 0x7ff /* for UHCI controller TD */
+#define UHCI_PID 0xff /* PID MASK */
+
+#define UHCI_PTR_BITS 0x000F
+#define UHCI_PTR_TERM 0x0001
+#define UHCI_PTR_QH 0x0002
+#define UHCI_PTR_DEPTH 0x0004
+
+/* for TD <status>: */
+#define TD_CTRL_SPD (1 << 29) /* Short Packet Detect */
+#define TD_CTRL_C_ERR_MASK (3 << 27) /* Error Counter bits */
+#define TD_CTRL_LS (1 << 26) /* Low Speed Device */
+#define TD_CTRL_IOS (1 << 25) /* Isochronous Select */
+#define TD_CTRL_IOC (1 << 24) /* Interrupt on Complete */
+#define TD_CTRL_ACTIVE (1 << 23) /* TD Active */
+#define TD_CTRL_STALLED (1 << 22) /* TD Stalled */
+#define TD_CTRL_DBUFERR (1 << 21) /* Data Buffer Error */
+#define TD_CTRL_BABBLE (1 << 20) /* Babble Detected */
+#define TD_CTRL_NAK (1 << 19) /* NAK Received */
+#define TD_CTRL_CRCTIMEO (1 << 18) /* CRC/Time Out Error */
+#define TD_CTRL_BITSTUFF (1 << 17) /* Bit Stuff Error */
+#define TD_CTRL_ACTLEN_MASK 0x7ff /* actual length, encoded as n - 1 */
+
+#define TD_CTRL_ANY_ERROR (TD_CTRL_STALLED | TD_CTRL_DBUFERR | \
+ TD_CTRL_BABBLE | TD_CTRL_CRCTIME | \
+ TD_CTRL_BITSTUFF)
+
+#define TD_TOKEN_TOGGLE 19
+
+/*
+ * Virtual Root HUB
+ */
+/* destination of request */
+#define RH_INTERFACE 0x01
+#define RH_ENDPOINT 0x02
+#define RH_OTHER 0x03
+
+#define RH_CLASS 0x20
+#define RH_VENDOR 0x40
+
+/* Requests: bRequest << 8 | bmRequestType */
+#define RH_GET_STATUS 0x0080
+#define RH_CLEAR_FEATURE 0x0100
+#define RH_SET_FEATURE 0x0300
+#define RH_SET_ADDRESS 0x0500
+#define RH_GET_DESCRIPTOR 0x0680
+#define RH_SET_DESCRIPTOR 0x0700
+#define RH_GET_CONFIGURATION 0x0880
+#define RH_SET_CONFIGURATION 0x0900
+#define RH_GET_STATE 0x0280
+#define RH_GET_INTERFACE 0x0A80
+#define RH_SET_INTERFACE 0x0B00
+#define RH_SYNC_FRAME 0x0C80
+/* Our Vendor Specific Request */
+#define RH_SET_EP 0x2000
+
+/* Hub port features */
+#define RH_PORT_CONNECTION 0x00
+#define RH_PORT_ENABLE 0x01
+#define RH_PORT_SUSPEND 0x02
+#define RH_PORT_OVER_CURRENT 0x03
+#define RH_PORT_RESET 0x04
+#define RH_PORT_POWER 0x08
+#define RH_PORT_LOW_SPEED 0x09
+#define RH_C_PORT_CONNECTION 0x10
+#define RH_C_PORT_ENABLE 0x11
+#define RH_C_PORT_SUSPEND 0x12
+#define RH_C_PORT_OVER_CURRENT 0x13
+#define RH_C_PORT_RESET 0x14
+
+/* Hub features */
+#define RH_C_HUB_LOCAL_POWER 0x00
+#define RH_C_HUB_OVER_CURRENT 0x01
+
+#define RH_DEVICE_REMOTE_WAKEUP 0x00
+#define RH_ENDPOINT_STALL 0x01
+
+/* Our Vendor Specific feature */
+#define RH_REMOVE_EP 0x00
+
+
+#define RH_ACK 0x01
+#define RH_REQ_ERR -1
+#define RH_NACK 0x00
+
+
+/* Transfer descriptor structure */
+struct uhci_td {
+ unsigned long link; /* next td/qh (LE)*/
+ unsigned long status; /* status of the td */
+ unsigned long info; /* Max Lenght / Endpoint / dev address and PID*/
+ unsigned long buffer; /* pointer to data buffer (LE) */
+ unsigned long dev_ptr; /* pointer to the assigned device (BE) */
+ unsigned long res[3]; /* reserved (TDs must be 8Byte aligned) */
+};
+
+/* Queue Header structure */
+struct uhci_qh {
+ unsigned long head; /* Next QH (LE)*/
+ unsigned long element; /* Queue element pointer (LE) */
+ unsigned long res[5]; /* reserved */
+ unsigned long dev_ptr; /* if 0 no tds have been assigned to this qh*/
+};
+
+#endif /* _USB_UHCI_H_ */
--
2.1.4
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