USB: add Cypress c67x00 OTG controller HCD driver
authorPeter Korsgaard <jacmet@sunsite.dk>
Sun, 27 Apr 2008 06:59:45 +0000 (08:59 +0200)
committerGreg Kroah-Hartman <gregkh@suse.de>
Fri, 2 May 2008 17:25:57 +0000 (10:25 -0700)
This patch adds HCD support for the Cypress c67x00 family of devices.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/Makefile
drivers/usb/c67x00/Makefile [new file with mode: 0644]
drivers/usb/c67x00/c67x00-drv.c
drivers/usb/c67x00/c67x00-hcd.c [new file with mode: 0644]
drivers/usb/c67x00/c67x00-hcd.h [new file with mode: 0644]
drivers/usb/c67x00/c67x00-ll-hpi.c
drivers/usb/c67x00/c67x00-sched.c [new file with mode: 0644]
drivers/usb/c67x00/c67x00.h
drivers/usb/host/Kconfig

index 516a640..a419c42 100644 (file)
@@ -17,6 +17,8 @@ obj-$(CONFIG_USB_SL811_HCD)   += host/
 obj-$(CONFIG_USB_U132_HCD)     += host/
 obj-$(CONFIG_USB_R8A66597_HCD) += host/
 
+obj-$(CONFIG_USB_C67X00_HCD)   += c67x00/
+
 obj-$(CONFIG_USB_ACM)          += class/
 obj-$(CONFIG_USB_PRINTER)      += class/
 
diff --git a/drivers/usb/c67x00/Makefile b/drivers/usb/c67x00/Makefile
new file mode 100644 (file)
index 0000000..868bc41
--- /dev/null
@@ -0,0 +1,9 @@
+#
+# Makefile for Cypress C67X00 USB Controller
+#
+
+ccflags-$(CONFIG_USB_DEBUG)            += -DDEBUG
+
+obj-$(CONFIG_USB_C67X00_HCD)           += c67x00.o
+
+c67x00-objs := c67x00-drv.o c67x00-ll-hpi.o c67x00-hcd.o c67x00-sched.o
index f8189bd..5633bc5 100644 (file)
@@ -41,6 +41,7 @@
 #include <linux/usb/c67x00.h>
 
 #include "c67x00.h"
+#include "c67x00-hcd.h"
 
 static void c67x00_probe_sie(struct c67x00_sie *sie,
                             struct c67x00_device *dev, int sie_num)
@@ -51,6 +52,10 @@ static void c67x00_probe_sie(struct c67x00_sie *sie,
        sie->mode = c67x00_sie_config(dev->pdata->sie_config, sie_num);
 
        switch (sie->mode) {
+       case C67X00_SIE_HOST:
+               c67x00_hcd_probe(sie);
+               break;
+
        case C67X00_SIE_UNUSED:
                dev_info(sie_dev(sie),
                         "Not using SIE %d as requested\n", sie->sie_num);
@@ -66,6 +71,14 @@ static void c67x00_probe_sie(struct c67x00_sie *sie,
 
 static void c67x00_remove_sie(struct c67x00_sie *sie)
 {
+       switch (sie->mode) {
+       case C67X00_SIE_HOST:
+               c67x00_hcd_remove(sie);
+               break;
+
+       default:
+               break;
+       }
 }
 
 static irqreturn_t c67x00_irq(int irq, void *__dev)
diff --git a/drivers/usb/c67x00/c67x00-hcd.c b/drivers/usb/c67x00/c67x00-hcd.c
new file mode 100644 (file)
index 0000000..a22b887
--- /dev/null
@@ -0,0 +1,412 @@
+/*
+ * c67x00-hcd.c: Cypress C67X00 USB Host Controller Driver
+ *
+ * Copyright (C) 2006-2008 Barco N.V.
+ *    Derived from the Cypress cy7c67200/300 ezusb linux driver and
+ *    based on multiple host controller drivers inside the linux kernel.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA  02110-1301  USA.
+ */
+
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/usb.h>
+
+#include "c67x00.h"
+#include "c67x00-hcd.h"
+
+/* --------------------------------------------------------------------------
+ * Root Hub Support
+ */
+
+static __u8 c67x00_hub_des[] = {
+       0x09,                   /*  __u8  bLength; */
+       0x29,                   /*  __u8  bDescriptorType; Hub-descriptor */
+       0x02,                   /*  __u8  bNbrPorts; */
+       0x00,                   /* __u16  wHubCharacteristics; */
+       0x00,                   /*   (per-port OC, no power switching) */
+       0x32,                   /*  __u8  bPwrOn2pwrGood; 2ms */
+       0x00,                   /*  __u8  bHubContrCurrent; 0 mA */
+       0x00,                   /*  __u8  DeviceRemovable; ** 7 Ports max ** */
+       0xff,                   /*  __u8  PortPwrCtrlMask; ** 7 ports max ** */
+};
+
+static void c67x00_hub_reset_host_port(struct c67x00_sie *sie, int port)
+{
+       struct c67x00_hcd *c67x00 = sie->private_data;
+       unsigned long flags;
+
+       c67x00_ll_husb_reset(sie, port);
+
+       spin_lock_irqsave(&c67x00->lock, flags);
+       c67x00_ll_husb_reset_port(sie, port);
+       spin_unlock_irqrestore(&c67x00->lock, flags);
+
+       c67x00_ll_set_husb_eot(sie->dev, DEFAULT_EOT);
+}
+
+static int c67x00_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+       struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
+       struct c67x00_sie *sie = c67x00->sie;
+       u16 status;
+       int i;
+
+       *buf = 0;
+       status = c67x00_ll_usb_get_status(sie);
+       for (i = 0; i < C67X00_PORTS; i++)
+               if (status & PORT_CONNECT_CHANGE(i))
+                       *buf |= (1 << i);
+
+       /* bit 0 denotes hub change, b1..n port change */
+       *buf <<= 1;
+
+       return !!*buf;
+}
+
+static int c67x00_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+                             u16 wIndex, char *buf, u16 wLength)
+{
+       struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
+       struct c67x00_sie *sie = c67x00->sie;
+       u16 status, usb_status;
+       int len = 0;
+       unsigned int port = wIndex-1;
+       u16 wPortChange, wPortStatus;
+
+       switch (typeReq) {
+
+       case GetHubStatus:
+               *(__le32 *) buf = cpu_to_le32(0);
+               len = 4;                /* hub power */
+               break;
+
+       case GetPortStatus:
+               if (wIndex > C67X00_PORTS)
+                       return -EPIPE;
+
+               status = c67x00_ll_usb_get_status(sie);
+               usb_status = c67x00_ll_get_usb_ctl(sie);
+
+               wPortChange = 0;
+               if (status & PORT_CONNECT_CHANGE(port))
+                       wPortChange |= USB_PORT_STAT_C_CONNECTION;
+
+               wPortStatus = USB_PORT_STAT_POWER;
+               if (!(status & PORT_SE0_STATUS(port)))
+                       wPortStatus |= USB_PORT_STAT_CONNECTION;
+               if (usb_status & LOW_SPEED_PORT(port)) {
+                       wPortStatus |= USB_PORT_STAT_LOW_SPEED;
+                       c67x00->low_speed_ports |= (1 << port);
+               } else
+                       c67x00->low_speed_ports &= ~(1 << port);
+
+               if (usb_status & SOF_EOP_EN(port))
+                       wPortStatus |= USB_PORT_STAT_ENABLE;
+
+               *(__le16 *) buf = cpu_to_le16(wPortStatus);
+               *(__le16 *) (buf + 2) = cpu_to_le16(wPortChange);
+               len = 4;
+               break;
+
+       case SetHubFeature:     /* We don't implement these */
+       case ClearHubFeature:
+               switch (wValue) {
+               case C_HUB_OVER_CURRENT:
+               case C_HUB_LOCAL_POWER:
+                       len = 0;
+                       break;
+
+               default:
+                       return -EPIPE;
+               }
+               break;
+
+       case SetPortFeature:
+               if (wIndex > C67X00_PORTS)
+                       return -EPIPE;
+
+               switch (wValue) {
+               case USB_PORT_FEAT_SUSPEND:
+                       dev_dbg(c67x00_hcd_dev(c67x00),
+                               "SetPortFeature %d (SUSPEND)\n", port);
+                       len = 0;
+                       break;
+
+               case USB_PORT_FEAT_RESET:
+                       c67x00_hub_reset_host_port(sie, port);
+                       len = 0;
+                       break;
+
+               case USB_PORT_FEAT_POWER:
+                       /* Power always enabled */
+                       len = 0;
+                       break;
+
+               default:
+                       dev_dbg(c67x00_hcd_dev(c67x00),
+                               "%s: SetPortFeature %d (0x%04x) Error!\n",
+                               __func__, port, wValue);
+                       return -EPIPE;
+               }
+               break;
+
+       case ClearPortFeature:
+               if (wIndex > C67X00_PORTS)
+                       return -EPIPE;
+
+               switch (wValue) {
+               case USB_PORT_FEAT_ENABLE:
+                       /* Reset the port so that the c67x00 also notices the
+                        * disconnect */
+                       c67x00_hub_reset_host_port(sie, port);
+                       len = 0;
+                       break;
+
+               case USB_PORT_FEAT_C_ENABLE:
+                       dev_dbg(c67x00_hcd_dev(c67x00),
+                               "ClearPortFeature (%d): C_ENABLE\n", port);
+                       len = 0;
+                       break;
+
+               case USB_PORT_FEAT_SUSPEND:
+                       dev_dbg(c67x00_hcd_dev(c67x00),
+                               "ClearPortFeature (%d): SUSPEND\n", port);
+                       len = 0;
+                       break;
+
+               case USB_PORT_FEAT_C_SUSPEND:
+                       dev_dbg(c67x00_hcd_dev(c67x00),
+                               "ClearPortFeature (%d): C_SUSPEND\n", port);
+                       len = 0;
+                       break;
+
+               case USB_PORT_FEAT_POWER:
+                       dev_dbg(c67x00_hcd_dev(c67x00),
+                               "ClearPortFeature (%d): POWER\n", port);
+                       return -EPIPE;
+
+               case USB_PORT_FEAT_C_CONNECTION:
+                       c67x00_ll_usb_clear_status(sie,
+                                                  PORT_CONNECT_CHANGE(port));
+                       len = 0;
+                       break;
+
+               case USB_PORT_FEAT_C_OVER_CURRENT:
+                       dev_dbg(c67x00_hcd_dev(c67x00),
+                               "ClearPortFeature (%d): OVER_CURRENT\n", port);
+                       len = 0;
+                       break;
+
+               case USB_PORT_FEAT_C_RESET:
+                       dev_dbg(c67x00_hcd_dev(c67x00),
+                               "ClearPortFeature (%d): C_RESET\n", port);
+                       len = 0;
+                       break;
+
+               default:
+                       dev_dbg(c67x00_hcd_dev(c67x00),
+                               "%s: ClearPortFeature %d (0x%04x) Error!\n",
+                               __func__, port, wValue);
+                       return -EPIPE;
+               }
+               break;
+
+       case GetHubDescriptor:
+               len = min_t(unsigned int, sizeof(c67x00_hub_des), wLength);
+               memcpy(buf, c67x00_hub_des, len);
+               break;
+
+       default:
+               dev_dbg(c67x00_hcd_dev(c67x00), "%s: unknown\n", __func__);
+               return -EPIPE;
+       }
+
+       return 0;
+}
+
+/* ---------------------------------------------------------------------
+ * Main part of host controller driver
+ */
+
+/**
+ * c67x00_hcd_irq
+ *
+ * This function is called from the interrupt handler in c67x00-drv.c
+ */
+static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg)
+{
+       struct c67x00_hcd *c67x00 = sie->private_data;
+       struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
+
+       /* Handle sie message flags */
+       if (msg) {
+               if (msg & HUSB_TDListDone)
+                       c67x00_sched_kick(c67x00);
+               else
+                       dev_warn(c67x00_hcd_dev(c67x00),
+                                "Unknown SIE msg flag(s): 0x%04x\n", msg);
+       }
+
+       if (unlikely(hcd->state == HC_STATE_HALT))
+               return;
+
+       if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
+               return;
+
+       /* Handle Start of frame events */
+       if (int_status & SOFEOP_FLG(sie->sie_num)) {
+               c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG);
+               c67x00_sched_kick(c67x00);
+               set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
+       }
+}
+
+/**
+ * c67x00_hcd_start: Host controller start hook
+ */
+static int c67x00_hcd_start(struct usb_hcd *hcd)
+{
+       hcd->uses_new_polling = 1;
+       hcd->state = HC_STATE_RUNNING;
+       hcd->poll_rh = 1;
+
+       return 0;
+}
+
+/**
+ * c67x00_hcd_stop: Host controller stop hook
+ */
+static void c67x00_hcd_stop(struct usb_hcd *hcd)
+{
+       /* Nothing to do */
+}
+
+static int c67x00_hcd_get_frame(struct usb_hcd *hcd)
+{
+       struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
+       u16 temp_val;
+
+       dev_dbg(c67x00_hcd_dev(c67x00), "%s\n", __func__);
+       temp_val = c67x00_ll_husb_get_frame(c67x00->sie);
+       temp_val &= HOST_FRAME_MASK;
+       return temp_val ? (temp_val - 1) : HOST_FRAME_MASK;
+}
+
+static struct hc_driver c67x00_hc_driver = {
+       .description    = "c67x00-hcd",
+       .product_desc   = "Cypress C67X00 Host Controller",
+       .hcd_priv_size  = sizeof(struct c67x00_hcd),
+       .flags          = HCD_USB11 | HCD_MEMORY,
+
+       /*
+        * basic lifecycle operations
+        */
+       .start          = c67x00_hcd_start,
+       .stop           = c67x00_hcd_stop,
+
+       /*
+        * managing i/o requests and associated device resources
+        */
+       .urb_enqueue    = c67x00_urb_enqueue,
+       .urb_dequeue    = c67x00_urb_dequeue,
+       .endpoint_disable = c67x00_endpoint_disable,
+
+       /*
+        * scheduling support
+        */
+       .get_frame_number = c67x00_hcd_get_frame,
+
+       /*
+        * root hub support
+        */
+       .hub_status_data = c67x00_hub_status_data,
+       .hub_control    = c67x00_hub_control,
+};
+
+/* ---------------------------------------------------------------------
+ * Setup/Teardown routines
+ */
+
+int c67x00_hcd_probe(struct c67x00_sie *sie)
+{
+       struct c67x00_hcd *c67x00;
+       struct usb_hcd *hcd;
+       unsigned long flags;
+       int retval;
+
+       if (usb_disabled())
+               return -ENODEV;
+
+       hcd = usb_create_hcd(&c67x00_hc_driver, sie_dev(sie), "c67x00_sie");
+       if (!hcd) {
+               retval = -ENOMEM;
+               goto err0;
+       }
+       c67x00 = hcd_to_c67x00_hcd(hcd);
+
+       spin_lock_init(&c67x00->lock);
+       c67x00->sie = sie;
+
+       INIT_LIST_HEAD(&c67x00->list[PIPE_ISOCHRONOUS]);
+       INIT_LIST_HEAD(&c67x00->list[PIPE_INTERRUPT]);
+       INIT_LIST_HEAD(&c67x00->list[PIPE_CONTROL]);
+       INIT_LIST_HEAD(&c67x00->list[PIPE_BULK]);
+       c67x00->urb_count = 0;
+       INIT_LIST_HEAD(&c67x00->td_list);
+       c67x00->td_base_addr = CY_HCD_BUF_ADDR + SIE_TD_OFFSET(sie->sie_num);
+       c67x00->buf_base_addr = CY_HCD_BUF_ADDR + SIE_BUF_OFFSET(sie->sie_num);
+       c67x00->max_frame_bw = MAX_FRAME_BW_STD;
+
+       c67x00_ll_husb_init_host_port(sie);
+
+       init_completion(&c67x00->endpoint_disable);
+       retval = c67x00_sched_start_scheduler(c67x00);
+       if (retval)
+               goto err1;
+
+       retval = usb_add_hcd(hcd, 0, 0);
+       if (retval) {
+               dev_dbg(sie_dev(sie), "%s: usb_add_hcd returned %d\n",
+                       __func__, retval);
+               goto err2;
+       }
+
+       spin_lock_irqsave(&sie->lock, flags);
+       sie->private_data = c67x00;
+       sie->irq = c67x00_hcd_irq;
+       spin_unlock_irqrestore(&sie->lock, flags);
+
+       return retval;
+
+ err2:
+       c67x00_sched_stop_scheduler(c67x00);
+ err1:
+       usb_put_hcd(hcd);
+ err0:
+       return retval;
+}
+
+/* may be called with controller, bus, and devices active */
+void c67x00_hcd_remove(struct c67x00_sie *sie)
+{
+       struct c67x00_hcd *c67x00 = sie->private_data;
+       struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00);
+
+       c67x00_sched_stop_scheduler(c67x00);
+       usb_remove_hcd(hcd);
+       usb_put_hcd(hcd);
+}
diff --git a/drivers/usb/c67x00/c67x00-hcd.h b/drivers/usb/c67x00/c67x00-hcd.h
new file mode 100644 (file)
index 0000000..e8c6d94
--- /dev/null
@@ -0,0 +1,133 @@
+/*
+ * c67x00-hcd.h: Cypress C67X00 USB HCD
+ *
+ * Copyright (C) 2006-2008 Barco N.V.
+ *    Derived from the Cypress cy7c67200/300 ezusb linux driver and
+ *    based on multiple host controller drivers inside the linux kernel.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA  02110-1301  USA.
+ */
+
+#ifndef _USB_C67X00_HCD_H
+#define _USB_C67X00_HCD_H
+
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/usb.h>
+#include "../core/hcd.h"
+#include "c67x00.h"
+
+/*
+ * The following parameters depend on the CPU speed, bus speed, ...
+ * These can be tuned for specific use cases, e.g. if isochronous transfers
+ * are very important, bandwith can be sacrificed to guarantee that the
+ * 1ms deadline will be met.
+ * If bulk transfers are important, the MAX_FRAME_BW can be increased,
+ * but some (or many) isochronous deadlines might not be met.
+ *
+ * The values are specified in bittime.
+ */
+
+/*
+ * The current implementation switches between _STD (default) and _ISO (when
+ * isochronous transfers are scheduled), in order to optimize the throughput
+ * in normal cicrumstances, but also provide good isochronous behaviour.
+ *
+ * Bandwidth is described in bit time so with a 12MHz USB clock and 1ms
+ * frames; there are 12000 bit times per frame.
+ */
+
+#define TOTAL_FRAME_BW         12000
+#define DEFAULT_EOT            2250
+
+#define MAX_FRAME_BW_STD       (TOTAL_FRAME_BW - DEFAULT_EOT)
+#define MAX_FRAME_BW_ISO       2400
+
+/*
+ * Periodic transfers may only use 90% of the full frame, but as
+ * we currently don't even use 90% of the full frame, we may
+ * use the full usable time for periodic transfers.
+ */
+#define MAX_PERIODIC_BW(full_bw)       full_bw
+
+/* -------------------------------------------------------------------------- */
+
+struct c67x00_hcd {
+       spinlock_t lock;
+       struct c67x00_sie *sie;
+       unsigned int low_speed_ports;   /* bitmask of low speed ports */
+       unsigned int urb_count;
+       unsigned int urb_iso_count;
+
+       struct list_head list[4];       /* iso, int, ctrl, bulk */
+#if PIPE_BULK != 3
+#error "Sanity check failed, this code presumes PIPE_... to range from 0 to 3"
+#endif
+
+       /* USB bandwidth allocated to td_list */
+       int bandwidth_allocated;
+       /* USB bandwidth allocated for isoc/int transfer */
+       int periodic_bw_allocated;
+       struct list_head td_list;
+       int max_frame_bw;
+
+       u16 td_base_addr;
+       u16 buf_base_addr;
+       u16 next_td_addr;
+       u16 next_buf_addr;
+
+       struct tasklet_struct tasklet;
+
+       struct completion endpoint_disable;
+
+       u16 current_frame;
+       u16 last_frame;
+};
+
+static inline struct c67x00_hcd *hcd_to_c67x00_hcd(struct usb_hcd *hcd)
+{
+       return (struct c67x00_hcd *)(hcd->hcd_priv);
+}
+
+static inline struct usb_hcd *c67x00_hcd_to_hcd(struct c67x00_hcd *c67x00)
+{
+       return container_of((void *)c67x00, struct usb_hcd, hcd_priv);
+}
+
+/* ---------------------------------------------------------------------
+ * Functions used by c67x00-drv
+ */
+
+int c67x00_hcd_probe(struct c67x00_sie *sie);
+void c67x00_hcd_remove(struct c67x00_sie *sie);
+
+/* ---------------------------------------------------------------------
+ * Transfer Descriptor scheduling functions
+ */
+int c67x00_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags);
+int c67x00_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
+void c67x00_endpoint_disable(struct usb_hcd *hcd,
+                            struct usb_host_endpoint *ep);
+
+void c67x00_hcd_msg_received(struct c67x00_sie *sie, u16 msg);
+void c67x00_sched_kick(struct c67x00_hcd *c67x00);
+int c67x00_sched_start_scheduler(struct c67x00_hcd *c67x00);
+void c67x00_sched_stop_scheduler(struct c67x00_hcd *c67x00);
+
+#define c67x00_hcd_dev(x)      (c67x00_hcd_to_hcd(x)->self.controller)
+
+#endif                         /* _USB_C67X00_HCD_H */
index e921991..f3430b3 100644 (file)
@@ -297,6 +297,81 @@ static int c67x00_comm_exec_int(struct c67x00_device *dev, u16 nr,
 }
 
 /* -------------------------------------------------------------------------- */
+/* Host specific functions */
+
+void c67x00_ll_set_husb_eot(struct c67x00_device *dev, u16 value)
+{
+       mutex_lock(&dev->hpi.lcp.mutex);
+       hpi_write_word(dev, HUSB_pEOT, value);
+       mutex_unlock(&dev->hpi.lcp.mutex);
+}
+
+static inline void c67x00_ll_husb_sie_init(struct c67x00_sie *sie)
+{
+       struct c67x00_device *dev = sie->dev;
+       struct c67x00_lcp_int_data data;
+       int rc;
+
+       rc = c67x00_comm_exec_int(dev, HUSB_SIE_INIT_INT(sie->sie_num), &data);
+       BUG_ON(rc); /* No return path for error code; crash spectacularly */
+}
+
+void c67x00_ll_husb_reset(struct c67x00_sie *sie, int port)
+{
+       struct c67x00_device *dev = sie->dev;
+       struct c67x00_lcp_int_data data;
+       int rc;
+
+       data.regs[0] = 50;      /* Reset USB port for 50ms */
+       data.regs[1] = port | (sie->sie_num << 1);
+       rc = c67x00_comm_exec_int(dev, HUSB_RESET_INT, &data);
+       BUG_ON(rc); /* No return path for error code; crash spectacularly */
+}
+
+void c67x00_ll_husb_set_current_td(struct c67x00_sie *sie, u16 addr)
+{
+       hpi_write_word(sie->dev, HUSB_SIE_pCurrentTDPtr(sie->sie_num), addr);
+}
+
+u16 c67x00_ll_husb_get_current_td(struct c67x00_sie *sie)
+{
+       return hpi_read_word(sie->dev, HUSB_SIE_pCurrentTDPtr(sie->sie_num));
+}
+
+u16 c67x00_ll_husb_get_frame(struct c67x00_sie *sie)
+{
+       return hpi_read_word(sie->dev, HOST_FRAME_REG(sie->sie_num));
+}
+
+void c67x00_ll_husb_init_host_port(struct c67x00_sie *sie)
+{
+       /* Set port into host mode */
+       hpi_set_bits(sie->dev, USB_CTL_REG(sie->sie_num), HOST_MODE);
+       c67x00_ll_husb_sie_init(sie);
+       /* Clear interrupts */
+       c67x00_ll_usb_clear_status(sie, HOST_STAT_MASK);
+       /* Check */
+       if (!(hpi_read_word(sie->dev, USB_CTL_REG(sie->sie_num)) & HOST_MODE))
+               dev_warn(sie_dev(sie),
+                        "SIE %d not set to host mode\n", sie->sie_num);
+}
+
+void c67x00_ll_husb_reset_port(struct c67x00_sie *sie, int port)
+{
+       /* Clear connect change */
+       c67x00_ll_usb_clear_status(sie, PORT_CONNECT_CHANGE(port));
+
+       /* Enable interrupts */
+       hpi_set_bits(sie->dev, HPI_IRQ_ROUTING_REG,
+                    SOFEOP_TO_CPU_EN(sie->sie_num));
+       hpi_set_bits(sie->dev, HOST_IRQ_EN_REG(sie->sie_num),
+                    SOF_EOP_IRQ_EN | DONE_IRQ_EN);
+
+       /* Enable pull down transistors */
+       hpi_set_bits(sie->dev, USB_CTL_REG(sie->sie_num), PORT_RES_EN(port));
+}
+
+/* -------------------------------------------------------------------------- */
 
 void c67x00_ll_irq(struct c67x00_device *dev, u16 int_status)
 {
diff --git a/drivers/usb/c67x00/c67x00-sched.c b/drivers/usb/c67x00/c67x00-sched.c
new file mode 100644 (file)
index 0000000..85dfe29
--- /dev/null
@@ -0,0 +1,1170 @@
+/*
+ * c67x00-sched.c: Cypress C67X00 USB Host Controller Driver - TD scheduling
+ *
+ * Copyright (C) 2006-2008 Barco N.V.
+ *    Derived from the Cypress cy7c67200/300 ezusb linux driver and
+ *    based on multiple host controller drivers inside the linux kernel.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA  02110-1301  USA.
+ */
+
+#include <linux/kthread.h>
+
+#include "c67x00.h"
+#include "c67x00-hcd.h"
+
+/*
+ * These are the stages for a control urb, they are kept
+ * in both urb->interval and td->privdata.
+ */
+#define SETUP_STAGE            0
+#define DATA_STAGE             1
+#define STATUS_STAGE           2
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * struct c67x00_ep_data: Host endpoint data structure
+ */
+struct c67x00_ep_data {
+       struct list_head queue;
+       struct list_head node;
+       struct usb_host_endpoint *hep;
+       struct usb_device *dev;
+       u16 next_frame;         /* For int/isoc transactions */
+};
+
+/**
+ * struct c67x00_td
+ *
+ * Hardware parts are little endiannes, SW in CPU endianess.
+ */
+struct c67x00_td {
+       /* HW specific part */
+       __le16 ly_base_addr;    /* Bytes 0-1 */
+       __le16 port_length;     /* Bytes 2-3 */
+       u8 pid_ep;              /* Byte 4 */
+       u8 dev_addr;            /* Byte 5 */
+       u8 ctrl_reg;            /* Byte 6 */
+       u8 status;              /* Byte 7 */
+       u8 retry_cnt;           /* Byte 8 */
+#define TT_OFFSET              2
+#define TT_CONTROL             0
+#define TT_ISOCHRONOUS         1
+#define TT_BULK                        2
+#define TT_INTERRUPT           3
+       u8 residue;             /* Byte 9 */
+       __le16 next_td_addr;    /* Bytes 10-11 */
+       /* SW part */
+       struct list_head td_list;
+       u16 td_addr;
+       void *data;
+       struct urb *urb;
+       unsigned long privdata;
+
+       /* These are needed for handling the toggle bits:
+        * an urb can be dequeued while a td is in progress
+        * after checking the td, the toggle bit might need to
+        * be fixed */
+       struct c67x00_ep_data *ep_data;
+       unsigned int pipe;
+};
+
+struct c67x00_urb_priv {
+       struct list_head hep_node;
+       struct urb *urb;
+       int port;
+       int cnt;                /* packet number for isoc */
+       int status;
+       struct c67x00_ep_data *ep_data;
+};
+
+#define td_udev(td)    ((td)->ep_data->dev)
+
+#define CY_TD_SIZE             12
+
+#define TD_PIDEP_OFFSET                0x04
+#define TD_PIDEPMASK_PID       0xF0
+#define TD_PIDEPMASK_EP                0x0F
+#define TD_PORTLENMASK_DL      0x02FF
+#define TD_PORTLENMASK_PN      0xC000
+
+#define TD_STATUS_OFFSET       0x07
+#define TD_STATUSMASK_ACK      0x01
+#define TD_STATUSMASK_ERR      0x02
+#define TD_STATUSMASK_TMOUT    0x04
+#define TD_STATUSMASK_SEQ      0x08
+#define TD_STATUSMASK_SETUP    0x10
+#define TD_STATUSMASK_OVF      0x20
+#define TD_STATUSMASK_NAK      0x40
+#define TD_STATUSMASK_STALL    0x80
+
+#define TD_ERROR_MASK          (TD_STATUSMASK_ERR | TD_STATUSMASK_TMOUT | \
+                                TD_STATUSMASK_STALL)
+
+#define TD_RETRYCNT_OFFSET     0x08
+#define TD_RETRYCNTMASK_ACT_FLG        0x10
+#define TD_RETRYCNTMASK_TX_TYPE        0x0C
+#define TD_RETRYCNTMASK_RTY_CNT        0x03
+
+#define TD_RESIDUE_OVERFLOW    0x80
+
+#define TD_PID_IN              0x90
+
+/* Residue: signed 8bits, neg -> OVERFLOW, pos -> UNDERFLOW */
+#define td_residue(td)         ((__s8)(td->residue))
+#define td_ly_base_addr(td)    (__le16_to_cpu((td)->ly_base_addr))
+#define td_port_length(td)     (__le16_to_cpu((td)->port_length))
+#define td_next_td_addr(td)    (__le16_to_cpu((td)->next_td_addr))
+
+#define td_active(td)          ((td)->retry_cnt & TD_RETRYCNTMASK_ACT_FLG)
+#define td_length(td)          (td_port_length(td) & TD_PORTLENMASK_DL)
+
+#define td_sequence_ok(td)     (!td->status || \
+                                (!(td->status & TD_STATUSMASK_SEQ) ==  \
+                                 !(td->ctrl_reg & SEQ_SEL)))
+
+#define td_acked(td)           (!td->status || \
+                                (td->status & TD_STATUSMASK_ACK))
+#define td_actual_bytes(td)    (td_length(td) - td_residue(td))
+
+/* -------------------------------------------------------------------------- */
+
+#ifdef DEBUG
+
+/**
+ * dbg_td - Dump the contents of the TD
+ */
+static void dbg_td(struct c67x00_hcd *c67x00, struct c67x00_td *td, char *msg)
+{
+       struct device *dev = c67x00_hcd_dev(c67x00);
+
+       dev_dbg(dev, "### %s at 0x%04x\n", msg, td->td_addr);
+       dev_dbg(dev, "urb:      0x%p\n", td->urb);
+       dev_dbg(dev, "endpoint:   %4d\n", usb_pipeendpoint(td->pipe));
+       dev_dbg(dev, "pipeout:    %4d\n", usb_pipeout(td->pipe));
+       dev_dbg(dev, "ly_base_addr: 0x%04x\n", td_ly_base_addr(td));
+       dev_dbg(dev, "port_length:  0x%04x\n", td_port_length(td));
+       dev_dbg(dev, "pid_ep:         0x%02x\n", td->pid_ep);
+       dev_dbg(dev, "dev_addr:       0x%02x\n", td->dev_addr);
+       dev_dbg(dev, "ctrl_reg:       0x%02x\n", td->ctrl_reg);
+       dev_dbg(dev, "status:         0x%02x\n", td->status);
+       dev_dbg(dev, "retry_cnt:      0x%02x\n", td->retry_cnt);
+       dev_dbg(dev, "residue:        0x%02x\n", td->residue);
+       dev_dbg(dev, "next_td_addr: 0x%04x\n", td_next_td_addr(td));
+       dev_dbg(dev, "data:");
+       print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 1,
+                      td->data, td_length(td), 1);
+}
+#else                          /* DEBUG */
+
+static inline void
+dbg_td(struct c67x00_hcd *c67x00, struct c67x00_td *td, char *msg) { }
+
+#endif                         /* DEBUG */
+
+/* -------------------------------------------------------------------------- */
+/* Helper functions */
+
+static inline u16 c67x00_get_current_frame_number(struct c67x00_hcd *c67x00)
+{
+       return c67x00_ll_husb_get_frame(c67x00->sie) & HOST_FRAME_MASK;
+}
+
+/**
+ * frame_add
+ * Software wraparound for framenumbers.
+ */
+static inline u16 frame_add(u16 a, u16 b)
+{
+       return (a + b) & HOST_FRAME_MASK;
+}
+
+/**
+ * frame_after - is frame a after frame b
+ */
+static inline int frame_after(u16 a, u16 b)
+{
+       return ((HOST_FRAME_MASK + a - b) & HOST_FRAME_MASK) <
+           (HOST_FRAME_MASK / 2);
+}
+
+/**
+ * frame_after_eq - is frame a after or equal to frame b
+ */
+static inline int frame_after_eq(u16 a, u16 b)
+{
+       return ((HOST_FRAME_MASK + 1 + a - b) & HOST_FRAME_MASK) <
+           (HOST_FRAME_MASK / 2);
+}
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * c67x00_release_urb - remove link from all tds to this urb
+ * Disconnects the urb from it's tds, so that it can be given back.
+ * pre: urb->hcpriv != NULL
+ */
+static void c67x00_release_urb(struct c67x00_hcd *c67x00, struct urb *urb)
+{
+       struct c67x00_td *td;
+       struct c67x00_urb_priv *urbp;
+
+       BUG_ON(!urb);
+
+       c67x00->urb_count--;
+
+       if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+               c67x00->urb_iso_count--;
+               if (c67x00->urb_iso_count == 0)
+                       c67x00->max_frame_bw = MAX_FRAME_BW_STD;
+       }
+
+       /* TODO this might be not so efficient when we've got many urbs!
+        * Alternatives:
+        *   * only clear when needed
+        *   * keep a list of tds with each urbp
+        */
+       list_for_each_entry(td, &c67x00->td_list, td_list)
+               if (urb == td->urb)
+                       td->urb = NULL;
+
+       urbp = urb->hcpriv;
+       urb->hcpriv = NULL;
+       list_del(&urbp->hep_node);
+       kfree(urbp);
+}
+
+/* -------------------------------------------------------------------------- */
+
+static struct c67x00_ep_data *
+c67x00_ep_data_alloc(struct c67x00_hcd *c67x00, struct urb *urb)
+{
+       struct usb_host_endpoint *hep = urb->ep;
+       struct c67x00_ep_data *ep_data;
+       int type;
+
+       c67x00->current_frame = c67x00_get_current_frame_number(c67x00);
+
+       /* Check if endpoint already has a c67x00_ep_data struct allocated */
+       if (hep->hcpriv) {
+               ep_data = hep->hcpriv;
+               if (frame_after(c67x00->current_frame, ep_data->next_frame))
+                       ep_data->next_frame =
+                           frame_add(c67x00->current_frame, 1);
+               return hep->hcpriv;
+       }
+
+       /* Allocate and initialize a new c67x00 endpoint data structure */
+       ep_data = kzalloc(sizeof(*ep_data), GFP_ATOMIC);
+       if (!ep_data)
+               return NULL;
+
+       INIT_LIST_HEAD(&ep_data->queue);
+       INIT_LIST_HEAD(&ep_data->node);
+       ep_data->hep = hep;
+
+       /* hold a reference to udev as long as this endpoint lives,
+        * this is needed to possibly fix the data toggle */
+       ep_data->dev = usb_get_dev(urb->dev);
+       hep->hcpriv = ep_data;
+
+       /* For ISOC and INT endpoints, start ASAP: */
+       ep_data->next_frame = frame_add(c67x00->current_frame, 1);
+
+       /* Add the endpoint data to one of the pipe lists; must be added
+          in order of endpoint address */
+       type = usb_pipetype(urb->pipe);
+       if (list_empty(&ep_data->node)) {
+               list_add(&ep_data->node, &c67x00->list[type]);
+       } else {
+               struct c67x00_ep_data *prev;
+
+               list_for_each_entry(prev, &c67x00->list[type], node) {
+                       if (prev->hep->desc.bEndpointAddress >
+                           hep->desc.bEndpointAddress) {
+                               list_add(&ep_data->node, prev->node.prev);
+                               break;
+                       }
+               }
+       }
+
+       return ep_data;
+}
+
+static int c67x00_ep_data_free(struct usb_host_endpoint *hep)
+{
+       struct c67x00_ep_data *ep_data = hep->hcpriv;
+
+       if (!ep_data)
+               return 0;
+
+       if (!list_empty(&ep_data->queue))
+               return -EBUSY;
+
+       usb_put_dev(ep_data->dev);
+       list_del(&ep_data->queue);
+       list_del(&ep_data->node);
+
+       kfree(ep_data);
+       hep->hcpriv = NULL;
+
+       return 0;
+}
+
+void c67x00_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
+{
+       struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
+       unsigned long flags;
+
+       if (!list_empty(&ep->urb_list))
+               dev_warn(c67x00_hcd_dev(c67x00), "error: urb list not empty\n");
+
+       spin_lock_irqsave(&c67x00->lock, flags);
+
+       /* loop waiting for all transfers in the endpoint queue to complete */
+       while (c67x00_ep_data_free(ep)) {
+               /* Drop the lock so we can sleep waiting for the hardware */
+               spin_unlock_irqrestore(&c67x00->lock, flags);
+
+               /* it could happen that we reinitialize this completion, while
+                * somebody was waiting for that completion.  The timeout and
+                * while loop handle such cases, but this might be improved */
+               INIT_COMPLETION(c67x00->endpoint_disable);
+               c67x00_sched_kick(c67x00);
+               wait_for_completion_timeout(&c67x00->endpoint_disable, 1 * HZ);
+
+               spin_lock_irqsave(&c67x00->lock, flags);
+       }
+
+       spin_unlock_irqrestore(&c67x00->lock, flags);
+}
+
+/* -------------------------------------------------------------------------- */
+
+static inline int get_root_port(struct usb_device *dev)
+{
+       while (dev->parent->parent)
+               dev = dev->parent;
+       return dev->portnum;
+}
+
+int c67x00_urb_enqueue(struct usb_hcd *hcd,
+                      struct urb *urb, gfp_t mem_flags)
+{
+       int ret;
+       unsigned long flags;
+       struct c67x00_urb_priv *urbp;
+       struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
+       int port = get_root_port(urb->dev)-1;
+
+       spin_lock_irqsave(&c67x00->lock, flags);
+
+       /* Make sure host controller is running */
+       if (!HC_IS_RUNNING(hcd->state)) {
+               ret = -ENODEV;
+               goto err_not_linked;
+       }
+
+       ret = usb_hcd_link_urb_to_ep(hcd, urb);
+       if (ret)
+               goto err_not_linked;
+
+       /* Allocate and initialize urb private data */
+       urbp = kzalloc(sizeof(*urbp), mem_flags);
+       if (!urbp) {
+               ret = -ENOMEM;
+               goto err_urbp;
+       }
+
+       INIT_LIST_HEAD(&urbp->hep_node);
+       urbp->urb = urb;
+       urbp->port = port;
+
+       urbp->ep_data = c67x00_ep_data_alloc(c67x00, urb);
+
+       if (!urbp->ep_data) {
+               ret = -ENOMEM;
+               goto err_epdata;
+       }
+
+       /* TODO claim bandwidth with usb_claim_bandwidth?
+        * also release it somewhere! */
+
+       urb->hcpriv = urbp;
+
+       urb->actual_length = 0; /* Nothing received/transmitted yet */
+
+       switch (usb_pipetype(urb->pipe)) {
+       case PIPE_CONTROL:
+               urb->interval = SETUP_STAGE;
+               break;
+       case PIPE_INTERRUPT:
+               break;
+       case PIPE_BULK:
+               break;
+       case PIPE_ISOCHRONOUS:
+               if (c67x00->urb_iso_count == 0)
+                       c67x00->max_frame_bw = MAX_FRAME_BW_ISO;
+               c67x00->urb_iso_count++;
+               /* Assume always URB_ISO_ASAP, FIXME */
+               if (list_empty(&urbp->ep_data->queue))
+                       urb->start_frame = urbp->ep_data->next_frame;
+               else {
+                       /* Go right after the last one */
+                       struct urb *last_urb;
+
+                       last_urb = list_entry(urbp->ep_data->queue.prev,
+                                             struct c67x00_urb_priv,
+                                             hep_node)->urb;
+                       urb->start_frame =
+                           frame_add(last_urb->start_frame,
+                                     last_urb->number_of_packets *
+                                     last_urb->interval);
+               }
+               urbp->cnt = 0;
+               break;
+       }
+
+       /* Add the URB to the endpoint queue */
+       list_add_tail(&urbp->hep_node, &urbp->ep_data->queue);
+
+       /* If this is the only URB, kick start the controller */
+       if (!c67x00->urb_count++)
+               c67x00_ll_hpi_enable_sofeop(c67x00->sie);
+
+       c67x00_sched_kick(c67x00);
+       spin_unlock_irqrestore(&c67x00->lock, flags);
+
+       return 0;
+
+err_epdata:
+       kfree(urbp);
+err_urbp:
+       usb_hcd_unlink_urb_from_ep(hcd, urb);
+err_not_linked:
+       spin_unlock_irqrestore(&c67x00->lock, flags);
+
+       return ret;
+}
+
+int c67x00_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
+{
+       struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd);
+       unsigned long flags;
+       int rc;
+
+       spin_lock_irqsave(&c67x00->lock, flags);
+       rc = usb_hcd_check_unlink_urb(hcd, urb, status);
+       if (rc)
+               goto done;
+
+       c67x00_release_urb(c67x00, urb);
+       usb_hcd_unlink_urb_from_ep(hcd, urb);
+
+       spin_unlock(&c67x00->lock);
+       usb_hcd_giveback_urb(hcd, urb, status);
+       spin_lock(&c67x00->lock);
+
+       spin_unlock_irqrestore(&c67x00->lock, flags);
+
+       return 0;
+
+ done:
+       spin_unlock_irqrestore(&c67x00->lock, flags);
+       return rc;
+}
+
+/* -------------------------------------------------------------------------- */
+
+/*
+ * pre: c67x00 locked, urb unlocked
+ */
+static void
+c67x00_giveback_urb(struct c67x00_hcd *c67x00, struct urb *urb, int status)
+{
+       struct c67x00_urb_priv *urbp;
+
+       if (!urb)
+               return;
+
+       urbp = urb->hcpriv;
+       urbp->status = status;
+
+       list_del_init(&urbp->hep_node);
+
+       c67x00_release_urb(c67x00, urb);
+       usb_hcd_unlink_urb_from_ep(c67x00_hcd_to_hcd(c67x00), urb);
+       spin_unlock(&c67x00->lock);
+       usb_hcd_giveback_urb(c67x00_hcd_to_hcd(c67x00), urb, urbp->status);
+       spin_lock(&c67x00->lock);
+}
+
+/* -------------------------------------------------------------------------- */
+
+static int c67x00_claim_frame_bw(struct c67x00_hcd *c67x00, struct urb *urb,
+                                int len, int periodic)
+{
+       struct c67x00_urb_priv *urbp = urb->hcpriv;
+       int bit_time;
+
+       /* According to the C67x00 BIOS user manual, page 3-18,19, the
+        * following calculations provide the full speed bit times for
+        * a transaction.
+        *
+        * FS(in)       = 112.5 +  9.36*BC + HOST_DELAY
+        * FS(in,iso)   =  90.5 +  9.36*BC + HOST_DELAY
+        * FS(out)      = 112.5 +  9.36*BC + HOST_DELAY
+        * FS(out,iso)  =  78.4 +  9.36*BC + HOST_DELAY
+        * LS(in)       = 802.4 + 75.78*BC + HOST_DELAY
+        * LS(out)      = 802.6 + 74.67*BC + HOST_DELAY
+        *
+        * HOST_DELAY == 106 for the c67200 and c67300.
+        */
+
+       /* make calculations in 1/100 bit times to maintain resolution */
+       if (urbp->ep_data->dev->speed == USB_SPEED_LOW) {
+               /* Low speed pipe */
+               if (usb_pipein(urb->pipe))
+                       bit_time = 80240 + 7578*len;
+               else
+                       bit_time = 80260 + 7467*len;
+       } else {
+               /* FS pipes */
+               if (usb_pipeisoc(urb->pipe))
+                       bit_time = usb_pipein(urb->pipe) ? 9050 : 7840;
+               else
+                       bit_time = 11250;
+               bit_time += 936*len;
+       }
+
+       /* Scale back down to integer bit times.  Use a host delay of 106.
+        * (this is the only place it is used) */
+       bit_time = ((bit_time+50) / 100) + 106;
+
+       if (unlikely(bit_time + c67x00->bandwidth_allocated >=
+                    c67x00->max_frame_bw))
+               return -EMSGSIZE;
+
+       if (unlikely(c67x00->next_td_addr + CY_TD_SIZE >=
+                    c67x00->td_base_addr + SIE_TD_SIZE))
+               return -EMSGSIZE;
+
+       if (unlikely(c67x00->next_buf_addr + len >=
+                    c67x00->buf_base_addr + SIE_TD_BUF_SIZE))
+               return -EMSGSIZE;
+
+       if (periodic) {
+               if (unlikely(bit_time + c67x00->periodic_bw_allocated >=
+                            MAX_PERIODIC_BW(c67x00->max_frame_bw)))
+                       return -EMSGSIZE;
+               c67x00->periodic_bw_allocated += bit_time;
+       }
+
+       c67x00->bandwidth_allocated += bit_time;
+       return 0;
+}
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * td_addr and buf_addr must be word aligned
+ */
+static int c67x00_create_td(struct c67x00_hcd *c67x00, struct urb *urb,
+                           void *data, int len, int pid, int toggle,
+                           unsigned long privdata)
+{
+       struct c67x00_td *td;
+       struct c67x00_urb_priv *urbp = urb->hcpriv;
+       const __u8 active_flag = 1, retry_cnt = 1;
+       __u8 cmd = 0;
+       int tt = 0;
+
+       if (c67x00_claim_frame_bw(c67x00, urb, len, usb_pipeisoc(urb->pipe)
+                                 || usb_pipeint(urb->pipe)))
+               return -EMSGSIZE;       /* Not really an error, but expected */
+
+       td = kzalloc(sizeof(*td), GFP_ATOMIC);
+       if (!td)
+               return -ENOMEM;
+
+       td->pipe = urb->pipe;
+       td->ep_data = urbp->ep_data;
+
+       if ((td_udev(td)->speed == USB_SPEED_LOW) &&
+           !(c67x00->low_speed_ports & (1 << urbp->port)))
+               cmd |= PREAMBLE_EN;
+
+       switch (usb_pipetype(td->pipe)) {
+       case PIPE_ISOCHRONOUS:
+               tt = TT_ISOCHRONOUS;
+               cmd |= ISO_EN;
+               break;
+       case PIPE_CONTROL:
+               tt = TT_CONTROL;
+               break;
+       case PIPE_BULK:
+               tt = TT_BULK;
+               break;
+       case PIPE_INTERRUPT:
+               tt = TT_INTERRUPT;
+               break;
+       }
+
+       if (toggle)
+               cmd |= SEQ_SEL;
+
+       cmd |= ARM_EN;
+
+       /* SW part */
+       td->td_addr = c67x00->next_td_addr;
+       c67x00->next_td_addr = c67x00->next_td_addr + CY_TD_SIZE;
+
+       /* HW part */
+       td->ly_base_addr = __cpu_to_le16(c67x00->next_buf_addr);
+       td->port_length = __cpu_to_le16((c67x00->sie->sie_num << 15) |
+                                       (urbp->port << 14) | (len & 0x3FF));
+       td->pid_ep = ((pid & 0xF) << TD_PIDEP_OFFSET) |
+           (usb_pipeendpoint(td->pipe) & 0xF);
+       td->dev_addr = usb_pipedevice(td->pipe) & 0x7F;
+       td->ctrl_reg = cmd;
+       td->status = 0;
+       td->retry_cnt = (tt << TT_OFFSET) | (active_flag << 4) | retry_cnt;
+       td->residue = 0;
+       td->next_td_addr = __cpu_to_le16(c67x00->next_td_addr);
+
+       /* SW part */
+       td->data = data;
+       td->urb = urb;
+       td->privdata = privdata;
+
+       c67x00->next_buf_addr += (len + 1) & ~0x01;     /* properly align */
+
+       list_add_tail(&td->td_list, &c67x00->td_list);
+       return 0;
+}
+
+static inline void c67x00_release_td(struct c67x00_td *td)
+{
+       list_del_init(&td->td_list);
+       kfree(td);
+}
+
+/* -------------------------------------------------------------------------- */
+
+static int c67x00_add_data_urb(struct c67x00_hcd *c67x00, struct urb *urb)
+{
+       int remaining;
+       int toggle;
+       int pid;
+       int ret = 0;
+       int maxps;
+       int need_empty;
+
+       toggle = usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+                              usb_pipeout(urb->pipe));
+       remaining = urb->transfer_buffer_length - urb->actual_length;
+
+       maxps = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+
+       need_empty = (urb->transfer_flags & URB_ZERO_PACKET) &&
+           usb_pipeout(urb->pipe) && !(remaining % maxps);
+
+       while (remaining || need_empty) {
+               int len;
+               char *td_buf;
+
+               len = (remaining > maxps) ? maxps : remaining;
+               if (!len)
+                       need_empty = 0;
+
+               pid = usb_pipeout(urb->pipe) ? USB_PID_OUT : USB_PID_IN;
+               td_buf = urb->transfer_buffer + urb->transfer_buffer_length -
+                   remaining;
+               ret = c67x00_create_td(c67x00, urb, td_buf, len, pid, toggle,
+                                      DATA_STAGE);
+               if (ret)
+                       return ret;     /* td wasn't created */
+
+               toggle ^= 1;
+               remaining -= len;
+               if (usb_pipecontrol(urb->pipe))
+                       break;
+       }
+
+       return 0;
+}
+
+/**
+ * return 0 in case more bandwidth is available, else errorcode
+ */
+static int c67x00_add_ctrl_urb(struct c67x00_hcd *c67x00, struct urb *urb)
+{
+       int ret;
+       int pid;
+
+       switch (urb->interval) {
+       default:
+       case SETUP_STAGE:
+               ret = c67x00_create_td(c67x00, urb, urb->setup_packet,
+                                      8, USB_PID_SETUP, 0, SETUP_STAGE);
+               if (ret)
+                       return ret;
+               urb->interval = SETUP_STAGE;
+               usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+                             usb_pipeout(urb->pipe), 1);
+               break;
+       case DATA_STAGE:
+               if (urb->transfer_buffer_length) {
+                       ret = c67x00_add_data_urb(c67x00, urb);
+                       if (ret)
+                               return ret;
+                       break;
+               }               /* else fallthrough */
+       case STATUS_STAGE:
+               pid = !usb_pipeout(urb->pipe) ? USB_PID_OUT : USB_PID_IN;
+               ret = c67x00_create_td(c67x00, urb, NULL, 0, pid, 1,
+                                      STATUS_STAGE);
+               if (ret)
+                       return ret;
+               break;
+       }
+
+       return 0;
+}
+
+/*
+ * return 0 in case more bandwidth is available, else errorcode
+ */
+static int c67x00_add_int_urb(struct c67x00_hcd *c67x00, struct urb *urb)
+{
+       struct c67x00_urb_priv *urbp = urb->hcpriv;
+
+       if (frame_after_eq(c67x00->current_frame, urbp->ep_data->next_frame)) {
+               urbp->ep_data->next_frame =
+                   frame_add(urbp->ep_data->next_frame, urb->interval);
+               return c67x00_add_data_urb(c67x00, urb);
+       }
+       return 0;
+}
+
+static int c67x00_add_iso_urb(struct c67x00_hcd *c67x00, struct urb *urb)
+{
+       struct c67x00_urb_priv *urbp = urb->hcpriv;
+
+       if (frame_after_eq(c67x00->current_frame, urbp->ep_data->next_frame)) {
+               char *td_buf;
+               int len, pid, ret;
+
+               BUG_ON(urbp->cnt >= urb->number_of_packets);
+
+               td_buf = urb->transfer_buffer +
+                   urb->iso_frame_desc[urbp->cnt].offset;
+               len = urb->iso_frame_desc[urbp->cnt].length;
+               pid = usb_pipeout(urb->pipe) ? USB_PID_OUT : USB_PID_IN;
+
+               ret = c67x00_create_td(c67x00, urb, td_buf, len, pid, 0,
+                                      urbp->cnt);
+               if (ret) {
+                       printk(KERN_DEBUG "create failed: %d\n", ret);
+                       urb->iso_frame_desc[urbp->cnt].actual_length = 0;
+                       urb->iso_frame_desc[urbp->cnt].status = ret;
+                       if (urbp->cnt + 1 == urb->number_of_packets)
+                               c67x00_giveback_urb(c67x00, urb, 0);
+               }
+
+               urbp->ep_data->next_frame =
+                   frame_add(urbp->ep_data->next_frame, urb->interval);
+               urbp->cnt++;
+       }
+       return 0;
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void c67x00_fill_from_list(struct c67x00_hcd *c67x00, int type,
+                                 int (*add)(struct c67x00_hcd *, struct urb *))
+{
+       struct c67x00_ep_data *ep_data;
+       struct urb *urb;
+
+       /* traverse every endpoint on the list */
+       list_for_each_entry(ep_data, &c67x00->list[type], node) {
+               if (!list_empty(&ep_data->queue)) {
+                       /* and add the first urb */
+                       /* isochronous transfer rely on this */
+                       urb = list_entry(ep_data->queue.next,
+                                        struct c67x00_urb_priv,
+                                        hep_node)->urb;
+                       add(c67x00, urb);
+               }
+       }
+}
+
+static void c67x00_fill_frame(struct c67x00_hcd *c67x00)
+{
+       struct c67x00_td *td, *ttd;
+
+       /* Check if we can proceed */
+       if (!list_empty(&c67x00->td_list)) {
+               dev_warn(c67x00_hcd_dev(c67x00),
+                        "TD list not empty! This should not happen!\n");
+               list_for_each_entry_safe(td, ttd, &c67x00->td_list, td_list) {
+                       dbg_td(c67x00, td, "Unprocessed td");
+                       c67x00_release_td(td);
+               }
+       }
+
+       /* Reinitialize variables */
+       c67x00->bandwidth_allocated = 0;
+       c67x00->periodic_bw_allocated = 0;
+
+       c67x00->next_td_addr = c67x00->td_base_addr;
+       c67x00->next_buf_addr = c67x00->buf_base_addr;
+
+       /* Fill the list */
+       c67x00_fill_from_list(c67x00, PIPE_ISOCHRONOUS, c67x00_add_iso_urb);
+       c67x00_fill_from_list(c67x00, PIPE_INTERRUPT, c67x00_add_int_urb);
+       c67x00_fill_from_list(c67x00, PIPE_CONTROL, c67x00_add_ctrl_urb);
+       c67x00_fill_from_list(c67x00, PIPE_BULK, c67x00_add_data_urb);
+}
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * Get TD from C67X00
+ */
+static inline void
+c67x00_parse_td(struct c67x00_hcd *c67x00, struct c67x00_td *td)
+{
+       c67x00_ll_read_mem_le16(c67x00->sie->dev,
+                               td->td_addr, td, CY_TD_SIZE);
+
+       if (usb_pipein(td->pipe) && td_actual_bytes(td))
+               c67x00_ll_read_mem_le16(c67x00->sie->dev, td_ly_base_addr(td),
+                                       td->data, td_actual_bytes(td));
+}
+
+static int c67x00_td_to_error(struct c67x00_hcd *c67x00, struct c67x00_td *td)
+{
+       if (td->status & TD_STATUSMASK_ERR) {
+               dbg_td(c67x00, td, "ERROR_FLAG");
+               return -EILSEQ;
+       }
+       if (td->status & TD_STATUSMASK_STALL) {
+               /* dbg_td(c67x00, td, "STALL"); */
+               return -EPIPE;
+       }
+       if (td->status & TD_STATUSMASK_TMOUT) {
+               dbg_td(c67x00, td, "TIMEOUT");
+               return -ETIMEDOUT;
+       }
+
+       return 0;
+}
+
+static inline int c67x00_end_of_data(struct c67x00_td *td)
+{
+       int maxps, need_empty, remaining;
+       struct urb *urb = td->urb;
+       int act_bytes;
+
+       act_bytes = td_actual_bytes(td);
+
+       if (unlikely(!act_bytes))
+               return 1;       /* This was an empty packet */
+
+       maxps = usb_maxpacket(td_udev(td), td->pipe, usb_pipeout(td->pipe));
+
+       if (unlikely(act_bytes < maxps))
+               return 1;       /* Smaller then full packet */
+
+       remaining = urb->transfer_buffer_length - urb->actual_length;
+       need_empty = (urb->transfer_flags & URB_ZERO_PACKET) &&
+           usb_pipeout(urb->pipe) && !(remaining % maxps);
+
+       if (unlikely(!remaining && !need_empty))
+               return 1;
+
+       return 0;
+}
+
+/* -------------------------------------------------------------------------- */
+
+/* Remove all td's from the list which come
+ * after last_td and are meant for the same pipe.
+ * This is used when a short packet has occured */
+static inline void c67x00_clear_pipe(struct c67x00_hcd *c67x00,
+                                    struct c67x00_td *last_td)
+{
+       struct c67x00_td *td, *tmp;
+       td = last_td;
+       tmp = last_td;
+       while (td->td_list.next != &c67x00->td_list) {
+               td = list_entry(td->td_list.next, struct c67x00_td, td_list);
+               if (td->pipe == last_td->pipe) {
+                       c67x00_release_td(td);
+                       td = tmp;
+               }
+               tmp = td;
+       }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void c67x00_handle_successful_td(struct c67x00_hcd *c67x00,
+                                       struct c67x00_td *td)
+{
+       struct urb *urb = td->urb;
+
+       if (!urb)
+               return;
+
+       urb->actual_length += td_actual_bytes(td);
+
+       switch (usb_pipetype(td->pipe)) {
+               /* isochronous tds are handled separately */
+       case PIPE_CONTROL:
+               switch (td->privdata) {
+               case SETUP_STAGE:
+                       urb->interval =
+                           urb->transfer_buffer_length ?
+                           DATA_STAGE : STATUS_STAGE;
+                       /* Don't count setup_packet with normal data: */
+                       urb->actual_length = 0;
+                       break;
+
+               case DATA_STAGE:
+                       if (c67x00_end_of_data(td)) {
+                               urb->interval = STATUS_STAGE;
+                               c67x00_clear_pipe(c67x00, td);
+                       }
+                       break;
+
+               case STATUS_STAGE:
+                       urb->interval = 0;
+                       c67x00_giveback_urb(c67x00, urb, 0);
+                       break;
+               }
+               break;
+
+       case PIPE_INTERRUPT:
+       case PIPE_BULK:
+               if (unlikely(c67x00_end_of_data(td))) {
+                       c67x00_clear_pipe(c67x00, td);
+                       c67x00_giveback_urb(c67x00, urb, 0);
+               }
+               break;
+       }
+}
+
+static void c67x00_handle_isoc(struct c67x00_hcd *c67x00, struct c67x00_td *td)
+{
+       struct urb *urb = td->urb;
+       struct c67x00_urb_priv *urbp;
+       int cnt;
+
+       if (!urb)
+               return;
+
+       urbp = urb->hcpriv;
+       cnt = td->privdata;
+
+       if (td->status & TD_ERROR_MASK)
+               urb->error_count++;
+
+       urb->iso_frame_desc[cnt].actual_length = td_actual_bytes(td);
+       urb->iso_frame_desc[cnt].status = c67x00_td_to_error(c67x00, td);
+       if (cnt + 1 == urb->number_of_packets)  /* Last packet */
+               c67x00_giveback_urb(c67x00, urb, 0);
+}
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * c67x00_check_td_list - handle tds which have been processed by the c67x00
+ * pre: current_td == 0
+ */
+static inline void c67x00_check_td_list(struct c67x00_hcd *c67x00)
+{
+       struct c67x00_td *td, *tmp;
+       struct urb *urb;
+       int ack_ok;
+       int clear_endpoint;
+
+       list_for_each_entry_safe(td, tmp, &c67x00->td_list, td_list) {
+               /* get the TD */
+               c67x00_parse_td(c67x00, td);
+               urb = td->urb;  /* urb can be NULL! */
+               ack_ok = 0;
+               clear_endpoint = 1;
+
+               /* Handle isochronous transfers separately */
+               if (usb_pipeisoc(td->pipe)) {
+                       clear_endpoint = 0;
+                       c67x00_handle_isoc(c67x00, td);
+                       goto cont;
+               }
+
+               /* When an error occurs, all td's for that pipe go into an
+                * inactive state. This state matches successful transfers so
+                * we must make sure not to service them. */
+               if (td->status & TD_ERROR_MASK) {
+                       c67x00_giveback_urb(c67x00, urb,
+                                           c67x00_td_to_error(c67x00, td));
+                       goto cont;
+               }
+
+               if ((td->status & TD_STATUSMASK_NAK) || !td_sequence_ok(td) ||
+                   !td_acked(td))
+                       goto cont;
+
+               /* Sequence ok and acked, don't need to fix toggle */
+               ack_ok = 1;
+
+               if (unlikely(td->status & TD_STATUSMASK_OVF)) {
+                       if (td_residue(td) & TD_RESIDUE_OVERFLOW) {
+                               /* Overflow */
+                               c67x00_giveback_urb(c67x00, urb, -EOVERFLOW);
+                               goto cont;
+                       }
+               }
+
+               clear_endpoint = 0;
+               c67x00_handle_successful_td(c67x00, td);
+
+cont:
+               if (clear_endpoint)
+                       c67x00_clear_pipe(c67x00, td);
+               if (ack_ok)
+                       usb_settoggle(td_udev(td), usb_pipeendpoint(td->pipe),
+                                     usb_pipeout(td->pipe),
+                                     !(td->ctrl_reg & SEQ_SEL));
+               /* next in list could have been removed, due to clear_pipe! */
+               tmp = list_entry(td->td_list.next, typeof(*td), td_list);
+               c67x00_release_td(td);
+       }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static inline int c67x00_all_tds_processed(struct c67x00_hcd *c67x00)
+{
+       /* If all tds are processed, we can check the previous frame (if
+        * there was any) and start our next frame.
+        */
+       return !c67x00_ll_husb_get_current_td(c67x00->sie);
+}
+
+/**
+ * Send td to C67X00
+ */
+static void c67x00_send_td(struct c67x00_hcd *c67x00, struct c67x00_td *td)
+{
+       int len = td_length(td);
+
+       if (len && ((td->pid_ep & TD_PIDEPMASK_PID) != TD_PID_IN))
+               c67x00_ll_write_mem_le16(c67x00->sie->dev, td_ly_base_addr(td),
+                                        td->data, len);
+
+       c67x00_ll_write_mem_le16(c67x00->sie->dev,
+                                td->td_addr, td, CY_TD_SIZE);
+}
+
+static void c67x00_send_frame(struct c67x00_hcd *c67x00)
+{
+       struct c67x00_td *td;
+
+       if (list_empty(&c67x00->td_list))
+               dev_warn(c67x00_hcd_dev(c67x00),
+                        "%s: td list should not be empty here!\n",
+                        __func__);
+
+       list_for_each_entry(td, &c67x00->td_list, td_list) {
+               if (td->td_list.next == &c67x00->td_list)
+                       td->next_td_addr = 0;   /* Last td in list */
+
+               c67x00_send_td(c67x00, td);
+       }
+
+       c67x00_ll_husb_set_current_td(c67x00->sie, c67x00->td_base_addr);
+}
+
+/* -------------------------------------------------------------------------- */
+
+/**
+ * c67x00_do_work - Schedulers state machine
+ */
+static void c67x00_do_work(struct c67x00_hcd *c67x00)
+{
+       spin_lock(&c67x00->lock);
+       /* Make sure all tds are processed */
+       if (!c67x00_all_tds_processed(c67x00))
+               goto out;
+
+       c67x00_check_td_list(c67x00);
+
+       /* no td's are being processed (current == 0)
+        * and all have been "checked" */
+       complete(&c67x00->endpoint_disable);
+
+       if (!list_empty(&c67x00->td_list))
+               goto out;
+
+       c67x00->current_frame = c67x00_get_current_frame_number(c67x00);
+       if (c67x00->current_frame == c67x00->last_frame)
+               goto out;       /* Don't send tds in same frame */
+       c67x00->last_frame = c67x00->current_frame;
+
+       /* If no urbs are scheduled, our work is done */
+       if (!c67x00->urb_count) {
+               c67x00_ll_hpi_disable_sofeop(c67x00->sie);
+               goto out;
+       }
+
+       c67x00_fill_frame(c67x00);
+       if (!list_empty(&c67x00->td_list))
+               /* TD's have been added to the frame */
+               c67x00_send_frame(c67x00);
+
+ out:
+       spin_unlock(&c67x00->lock);
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void c67x00_sched_tasklet(unsigned long __c67x00)
+{
+       struct c67x00_hcd *c67x00 = (struct c67x00_hcd *)__c67x00;
+       c67x00_do_work(c67x00);
+}
+
+void c67x00_sched_kick(struct c67x00_hcd *c67x00)
+{
+       tasklet_hi_schedule(&c67x00->tasklet);
+}
+
+int c67x00_sched_start_scheduler(struct c67x00_hcd *c67x00)
+{
+       tasklet_init(&c67x00->tasklet, c67x00_sched_tasklet,
+                    (unsigned long)c67x00);
+       return 0;
+}
+
+void c67x00_sched_stop_scheduler(struct c67x00_hcd *c67x00)
+{
+       tasklet_kill(&c67x00->tasklet);
+}
index 1f1a2ee..a26e9de 100644 (file)
@@ -274,6 +274,15 @@ void c67x00_ll_write_mem_le16(struct c67x00_device *dev, u16 addr,
 void c67x00_ll_read_mem_le16(struct c67x00_device *dev, u16 addr,
                             void *data, int len);
 
+/* Host specific functions */
+void c67x00_ll_set_husb_eot(struct c67x00_device *dev, u16 value);
+void c67x00_ll_husb_reset(struct c67x00_sie *sie, int port);
+void c67x00_ll_husb_set_current_td(struct c67x00_sie *sie, u16 addr);
+u16 c67x00_ll_husb_get_current_td(struct c67x00_sie *sie);
+u16 c67x00_ll_husb_get_frame(struct c67x00_sie *sie);
+void c67x00_ll_husb_init_host_port(struct c67x00_sie *sie);
+void c67x00_ll_husb_reset_port(struct c67x00_sie *sie, int port);
+
 /* Called by c67x00_irq to handle lcp interrupts */
 void c67x00_ll_irq(struct c67x00_device *dev, u16 int_status);
 
index acac568..33b467a 100644 (file)
@@ -4,6 +4,19 @@
 comment "USB Host Controller Drivers"
        depends on USB
 
+config USB_C67X00_HCD
+       tristate "Cypress C67x00 HCD support"
+       depends on USB
+       help
+         The Cypress C67x00 (EZ-Host/EZ-OTG) chips are dual-role
+         host/peripheral/OTG USB controllers.
+
+         Enable this option to support this chip in host controller mode.
+         If unsure, say N.
+
+         To compile this driver as a module, choose M here: the
+         module will be called c67x00.
+
 config USB_EHCI_HCD
        tristate "EHCI HCD (USB 2.0) support"
        depends on USB && USB_ARCH_HAS_EHCI