[REPOST PATCH 1/3] MXC: Add i.MX21 specific USB host controller driver.
Martin Fuzzey
mfuzzey at gmail.com
Sun Nov 8 13:52:22 EST 2009
This driver is a Full / Low speed only USB host for the i.MX21.
Signed-off-by: Martin Fuzzey <mfuzzey at gmail.com>
---
arch/arm/plat-mxc/include/mach/mx21-usbhost.h | 38 +
drivers/usb/Makefile | 1
drivers/usb/host/Kconfig | 11
drivers/usb/host/Makefile | 2
drivers/usb/host/imx21-dbg.c | 527 +++++++
drivers/usb/host/imx21-hcd.c | 1789 +++++++++++++++++++++++++
drivers/usb/host/imx21-hcd.h | 436 ++++++
7 files changed, 2804 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/plat-mxc/include/mach/mx21-usbhost.h
create mode 100644 drivers/usb/host/imx21-dbg.c
create mode 100644 drivers/usb/host/imx21-hcd.c
create mode 100644 drivers/usb/host/imx21-hcd.h
diff --git a/arch/arm/plat-mxc/include/mach/mx21-usbhost.h b/arch/arm/plat-mxc/include/mach/mx21-usbhost.h
new file mode 100644
index 0000000..22d0b59
--- /dev/null
+++ b/arch/arm/plat-mxc/include/mach/mx21-usbhost.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2009 Martin Fuzzey <mfuzzey at gmail.com>
+ *
+ * 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.
+ */
+
+#ifndef __ASM_ARCH_MX21_USBH
+#define __ASM_ARCH_MX21_USBH
+
+enum mx21_usbh_xcvr {
+ /* Values below as used by hardware (HWMODE register) */
+ MX21_USBXCVR_TXDIF_RXDIF = 0,
+ MX21_USBXCVR_TXDIF_RXSE = 1,
+ MX21_USBXCVR_TXSE_RXDIF = 2,
+ MX21_USBXCVR_TXSE_RXSE = 3,
+};
+
+struct mx21_usbh_platform_data {
+ enum mx21_usbh_xcvr host_xcvr; /* tranceiver mode host 1,2 ports */
+ enum mx21_usbh_xcvr otg_xcvr; /* tranceiver mode otg (as host) port */
+ u16 enable_host1:1,
+ enable_host2:1,
+ enable_otg_host:1, /* enable "OTG" port (as host) */
+ host1_xcverless:1, /* traceiverless host1 port */
+ host1_txenoe:1, /* output enable host1 transmit enable */
+ otg_ext_xcvr:1, /* external tranceiver for OTG port */
+ unused:10;
+};
+
+#endif /* __ASM_ARCH_MX21_USBH */
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index be3c9b8..80b4008 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -21,6 +21,7 @@ obj-$(CONFIG_USB_U132_HCD) += host/
obj-$(CONFIG_USB_R8A66597_HCD) += host/
obj-$(CONFIG_USB_HWA_HCD) += host/
obj-$(CONFIG_USB_ISP1760_HCD) += host/
+obj-$(CONFIG_USB_IMX21_HCD) += host/
obj-$(CONFIG_USB_C67X00_HCD) += c67x00/
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 9b43b22..fe2be81 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -381,3 +381,14 @@ config USB_HWA_HCD
To compile this driver a module, choose M here: the module
will be called "hwa-hc".
+
+config USB_IMX21_HCD
+ tristate "iMX21 HCD support"
+ depends on USB && ARM && MACH_MX21
+ help
+ This driver enables support for the on-chip USB host in the
+ iMX21 processor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called "imx21-hcd".
+
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index f58b249..4e0c67f 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -32,3 +32,5 @@ obj-$(CONFIG_USB_U132_HCD) += u132-hcd.o
obj-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
obj-$(CONFIG_USB_ISP1760_HCD) += isp1760.o
obj-$(CONFIG_USB_HWA_HCD) += hwa-hc.o
+obj-$(CONFIG_USB_IMX21_HCD) += imx21-hcd.o
+
diff --git a/drivers/usb/host/imx21-dbg.c b/drivers/usb/host/imx21-dbg.c
new file mode 100644
index 0000000..512f647
--- /dev/null
+++ b/drivers/usb/host/imx21-dbg.c
@@ -0,0 +1,527 @@
+/*
+ * Copyright (c) 2009 by Martin Fuzzey
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* this file is part of imx21-hcd.c */
+
+#ifndef DEBUG
+
+static inline void create_debug_files(struct imx21 *imx21) { }
+static inline void remove_debug_files(struct imx21 *imx21) { }
+static inline void debug_urb_submitted(struct imx21 *imx21, struct urb *urb) {}
+static inline void debug_urb_completed(struct imx21 *imx21, struct urb *urb,
+ int status) {}
+static inline void debug_urb_unlinked(struct imx21 *imx21, struct urb *urb) {}
+static inline void debug_urb_queued_for_etd(struct imx21 *imx21,
+ struct urb *urb) {}
+static inline void debug_urb_queued_for_dmem(struct imx21 *imx21,
+ struct urb *urb) {}
+static inline void debug_etd_allocated(struct imx21 *imx21) {}
+static inline void debug_etd_freed(struct imx21 *imx21) {}
+static inline void debug_dmem_allocated(struct imx21 *imx21, int size) {}
+static inline void debug_dmem_freed(struct imx21 *imx21, int size) {}
+static inline void debug_isoc_submitted(struct imx21 *imx21,
+ int frame, struct td *td) {}
+static inline void debug_isoc_completed(struct imx21 *imx21,
+ int frame, struct td *td, int cc, int len) {}
+
+#else
+
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+
+static const char *dir_labels[] = {
+ "TD 0",
+ "OUT",
+ "IN",
+ "TD 1"
+};
+
+static const char *speed_labels[] = {
+ "Full",
+ "Low"
+};
+
+static const char *format_labels[] = {
+ "Control",
+ "ISO",
+ "Bulk",
+ "Interrupt"
+};
+
+static inline struct debug_stats *stats_for_urb(struct imx21 *imx21,
+ struct urb *urb)
+{
+ return usb_pipeisoc(urb->pipe) ?
+ &imx21->isoc_stats : &imx21->nonisoc_stats;
+}
+
+static void debug_urb_submitted(struct imx21 *imx21, struct urb *urb)
+{
+ stats_for_urb(imx21, urb)->submitted++;
+}
+
+static void debug_urb_completed(struct imx21 *imx21, struct urb *urb, int st)
+{
+ if (st)
+ stats_for_urb(imx21, urb)->completed_failed++;
+ else
+ stats_for_urb(imx21, urb)->completed_ok++;
+}
+
+static void debug_urb_unlinked(struct imx21 *imx21, struct urb *urb)
+{
+ stats_for_urb(imx21, urb)->unlinked++;
+}
+
+static void debug_urb_queued_for_etd(struct imx21 *imx21, struct urb *urb)
+{
+ stats_for_urb(imx21, urb)->queue_etd++;
+}
+
+static void debug_urb_queued_for_dmem(struct imx21 *imx21, struct urb *urb)
+{
+ stats_for_urb(imx21, urb)->queue_dmem++;
+}
+
+static inline void debug_etd_allocated(struct imx21 *imx21)
+{
+ imx21->etd_usage.maximum = max(
+ ++(imx21->etd_usage.value),
+ imx21->etd_usage.maximum);
+}
+
+static inline void debug_etd_freed(struct imx21 *imx21)
+{
+ imx21->etd_usage.value--;
+}
+
+static inline void debug_dmem_allocated(struct imx21 *imx21, int size)
+{
+ imx21->dmem_usage.value += size;
+ imx21->dmem_usage.maximum = max(
+ imx21->dmem_usage.value,
+ imx21->dmem_usage.maximum);
+}
+
+static inline void debug_dmem_freed(struct imx21 *imx21, int size)
+{
+ imx21->dmem_usage.value -= size;
+}
+
+
+static void debug_isoc_submitted(struct imx21 *imx21,
+ int frame, struct td *td)
+{
+ struct debug_isoc_trace *trace = &imx21->isoc_trace[
+ imx21->isoc_trace_index++];
+
+ imx21->isoc_trace_index %= ARRAY_SIZE(imx21->isoc_trace);
+ trace->schedule_frame = td->frame;
+ trace->submit_frame = frame;
+ trace->request_len = td->len;
+ trace->td = td;
+}
+
+static inline void debug_isoc_completed(struct imx21 *imx21,
+ int frame, struct td *td, int cc, int len)
+{
+ struct debug_isoc_trace *trace, *trace_failed;
+ int i;
+ int found = 0;
+
+ trace = imx21->isoc_trace;
+ for (i = 0; i < ARRAY_SIZE(imx21->isoc_trace); i++, trace++) {
+ if (trace->td == td) {
+ trace->done_frame = frame;
+ trace->done_len = len;
+ trace->cc = cc;
+ trace->td = NULL;
+ found = 1;
+ break;
+ }
+ }
+
+ if (found && cc) {
+ trace_failed = &imx21->isoc_trace_failed[
+ imx21->isoc_trace_index_failed++];
+
+ imx21->isoc_trace_index_failed %= ARRAY_SIZE(
+ imx21->isoc_trace_failed);
+ *trace_failed = *trace;
+ }
+}
+
+
+static char *format_ep(struct usb_host_endpoint *ep, char *buf, int bufsize)
+{
+ if (ep)
+ snprintf(buf, bufsize, "ep_%02x (type:%02X kaddr:%p)",
+ ep->desc.bEndpointAddress,
+ usb_endpoint_type(&ep->desc),
+ ep);
+ else
+ snprintf(buf, bufsize, "none");
+ return buf;
+}
+
+static char *format_etd_dword0(u32 value, char *buf, int bufsize)
+{
+ snprintf(buf, bufsize,
+ "addr=%d ep=%d dir=%s speed=%s format=%s halted=%d",
+ value & 0x7F,
+ (value >> DW0_ENDPNT) & 0x0F,
+ dir_labels[(value >> DW0_DIRECT) & 0x03],
+ speed_labels[(value >> DW0_SPEED) & 0x01],
+ format_labels[(value >> DW0_FORMAT) & 0x03],
+ (value >> DW0_HALTED) & 0x01);
+ return buf;
+}
+
+static int debug_status_show(struct seq_file *s, void *v)
+{
+ struct imx21 *imx21 = s->private;
+ int etds_allocated = 0;
+ int etds_sw_busy = 0;
+ int etds_hw_busy = 0;
+ int dmem_blocks = 0;
+ int queued_for_etd = 0;
+ int queued_for_dmem = 0;
+ unsigned int dmem_bytes = 0;
+ int i;
+ struct etd_priv *etd;
+ u32 etd_enable_mask;
+ unsigned long flags;
+ struct imx21_dmem_area *dmem;
+ struct ep_priv *ep_priv;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ etd_enable_mask = readl(imx21->regs + USBH_ETDENSET);
+ for (i = 0, etd = imx21->etd; i < USB_NUM_ETD; i++, etd++) {
+ if (etd->alloc)
+ etds_allocated++;
+ if (etd->urb)
+ etds_sw_busy++;
+ if (etd_enable_mask & (1<<i))
+ etds_hw_busy++;
+ }
+
+ list_for_each_entry(dmem, &imx21->dmem_list, list) {
+ dmem_bytes += dmem->size;
+ dmem_blocks++;
+ }
+
+ list_for_each_entry(ep_priv, &imx21->queue_for_etd, queue)
+ queued_for_etd++;
+
+ list_for_each_entry(etd, &imx21->queue_for_dmem, queue)
+ queued_for_dmem++;
+
+ spin_unlock_irqrestore(&imx21->lock, flags);
+
+ seq_printf(s,
+ "Frame: %d\n"
+ "ETDs allocated: %d/%d (max=%d)\n"
+ "ETDs in use sw: %d\n"
+ "ETDs in use hw: %d\n"
+ "DMEM alocated: %d/%d (max=%d)\n"
+ "DMEM blocks: %d\n"
+ "Queued waiting for ETD: %d\n"
+ "Queued waiting for DMEM: %d\n",
+ readl(imx21->regs + USBH_FRMNUB) & 0xFFFF,
+ etds_allocated, USB_NUM_ETD, imx21->etd_usage.maximum,
+ etds_sw_busy,
+ etds_hw_busy,
+ dmem_bytes, DMEM_SIZE, imx21->dmem_usage.maximum,
+ dmem_blocks,
+ queued_for_etd,
+ queued_for_dmem);
+
+ return 0;
+}
+
+static int debug_dmem_show(struct seq_file *s, void *v)
+{
+ struct imx21 *imx21 = s->private;
+ struct imx21_dmem_area *dmem;
+ unsigned long flags;
+ char ep_text[40];
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ list_for_each_entry(dmem, &imx21->dmem_list, list)
+ seq_printf(s,
+ "%04X: size=0x%X "
+ "ep=%s\n",
+ dmem->offset, dmem->size,
+ format_ep(dmem->ep, ep_text, sizeof(ep_text)));
+
+ spin_unlock_irqrestore(&imx21->lock, flags);
+
+ return 0;
+}
+
+static int debug_etd_show(struct seq_file *s, void *v)
+{
+ struct imx21 *imx21 = s->private;
+ struct etd_priv *etd;
+ char buf[60];
+ u32 dword;
+ int i, j;
+ unsigned long flags;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ for (i = 0, etd = imx21->etd; i < USB_NUM_ETD; i++, etd++) {
+ int state = -1;
+ struct urb_priv *urb_priv;
+ if (etd->urb) {
+ urb_priv = etd->urb->hcpriv;
+ if (urb_priv)
+ state = urb_priv->state;
+ }
+
+ seq_printf(s,
+ "etd_num: %d\n"
+ "ep: %s\n"
+ "alloc: %d\n"
+ "len: %d\n"
+ "busy sw: %d\n"
+ "busy hw: %d\n"
+ "urb state: %d\n"
+ "current urb: %p\n",
+
+ i,
+ format_ep(etd->ep, buf, sizeof(buf)),
+ etd->alloc,
+ etd->len,
+ etd->urb != NULL,
+ (readl(imx21->regs + USBH_ETDENSET) & (1 << i)) > 0,
+ state,
+ etd->urb);
+
+ for (j = 0; j < 4; j++) {
+ dword = etd_readl(imx21, i, j);
+ switch (j) {
+ case 0:
+ format_etd_dword0(dword, buf, sizeof(buf));
+ break;
+ case 2:
+ snprintf(buf, sizeof(buf),
+ "cc=0X%02X", dword >> DW2_COMPCODE);
+ break;
+ default:
+ *buf = 0;
+ break;
+ }
+ seq_printf(s,
+ "dword %d: submitted=%08X cur=%08X [%s]\n",
+ j,
+ etd->submitted_dwords[j],
+ dword,
+ buf);
+ }
+ seq_printf(s, "\n");
+ }
+
+ spin_unlock_irqrestore(&imx21->lock, flags);
+
+ return 0;
+}
+
+static void debug_statistics_show_one(struct seq_file *s,
+ const char *name, struct debug_stats *stats)
+{
+ seq_printf(s, "%s:\n"
+ "submitted URBs: %lu\n"
+ "completed OK: %lu\n"
+ "completed failed: %lu\n"
+ "unlinked: %lu\n"
+ "queued for ETD: %lu\n"
+ "queued for DMEM: %lu\n\n",
+ name,
+ stats->submitted,
+ stats->completed_ok,
+ stats->completed_failed,
+ stats->unlinked,
+ stats->queue_etd,
+ stats->queue_dmem);
+}
+
+static int debug_statistics_show(struct seq_file *s, void *v)
+{
+ struct imx21 *imx21 = s->private;
+ unsigned long flags;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ debug_statistics_show_one(s, "nonisoc", &imx21->nonisoc_stats);
+ debug_statistics_show_one(s, "isoc", &imx21->isoc_stats);
+ seq_printf(s, "unblock kludge triggers: %lu\n", imx21->debug_unblocks);
+ spin_unlock_irqrestore(&imx21->lock, flags);
+
+ return 0;
+}
+
+static void debug_isoc_show_one(struct seq_file *s,
+ const char *name, int index, struct debug_isoc_trace *trace)
+{
+ seq_printf(s, "%s %d:\n"
+ "cc=0X%02X\n"
+ "scheduled frame %d (%d)\n"
+ "submittted frame %d (%d)\n"
+ "completed frame %d (%d)\n"
+ "requested length=%d\n"
+ "completed length=%d\n\n",
+ name, index,
+ trace->cc,
+ trace->schedule_frame, trace->schedule_frame & 0xFFFF,
+ trace->submit_frame, trace->submit_frame & 0xFFFF,
+ trace->done_frame, trace->done_frame & 0xFFFF,
+ trace->request_len,
+ trace->done_len);
+}
+
+static int debug_isoc_show(struct seq_file *s, void *v)
+{
+ struct imx21 *imx21 = s->private;
+ struct debug_isoc_trace *trace;
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ trace = imx21->isoc_trace_failed;
+ for (i = 0; i < ARRAY_SIZE(imx21->isoc_trace_failed); i++, trace++)
+ debug_isoc_show_one(s, "isoc failed", i, trace);
+
+ trace = imx21->isoc_trace;
+ for (i = 0; i < ARRAY_SIZE(imx21->isoc_trace); i++, trace++)
+ debug_isoc_show_one(s, "isoc", i, trace);
+
+ spin_unlock_irqrestore(&imx21->lock, flags);
+
+ return 0;
+}
+
+static int debug_status_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, debug_status_show, inode->i_private);
+}
+
+static int debug_dmem_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, debug_dmem_show, inode->i_private);
+}
+
+static int debug_etd_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, debug_etd_show, inode->i_private);
+}
+
+static int debug_statistics_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, debug_statistics_show, inode->i_private);
+}
+
+static int debug_isoc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, debug_isoc_show, inode->i_private);
+}
+
+static const struct file_operations debug_status_fops = {
+ .open = debug_status_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations debug_dmem_fops = {
+ .open = debug_dmem_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations debug_etd_fops = {
+ .open = debug_etd_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations debug_statistics_fops = {
+ .open = debug_statistics_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations debug_isoc_fops = {
+ .open = debug_isoc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void create_debug_files(struct imx21 *imx21)
+{
+ imx21->debug_root = debugfs_create_dir(dev_name(imx21->dev), NULL);
+ if (!imx21->debug_root)
+ goto failed_create_rootdir;
+
+ if (!debugfs_create_file("status", S_IRUGO,
+ imx21->debug_root, imx21, &debug_status_fops))
+ goto failed_create;
+
+ if (!debugfs_create_file("dmem", S_IRUGO,
+ imx21->debug_root, imx21, &debug_dmem_fops))
+ goto failed_create;
+
+ if (!debugfs_create_file("etd", S_IRUGO,
+ imx21->debug_root, imx21, &debug_etd_fops))
+ goto failed_create;
+
+ if (!debugfs_create_file("statistics", S_IRUGO,
+ imx21->debug_root, imx21, &debug_statistics_fops))
+ goto failed_create;
+
+ if (!debugfs_create_file("isoc", S_IRUGO,
+ imx21->debug_root, imx21, &debug_isoc_fops))
+ goto failed_create;
+
+ return;
+
+failed_create:
+ debugfs_remove_recursive(imx21->debug_root);
+
+failed_create_rootdir:
+ imx21->debug_root = NULL;
+}
+
+
+static void remove_debug_files(struct imx21 *imx21)
+{
+ if (imx21->debug_root) {
+ debugfs_remove_recursive(imx21->debug_root);
+ imx21->debug_root = NULL;
+ }
+}
+
+#endif
+
diff --git a/drivers/usb/host/imx21-hcd.c b/drivers/usb/host/imx21-hcd.c
new file mode 100644
index 0000000..213e270
--- /dev/null
+++ b/drivers/usb/host/imx21-hcd.c
@@ -0,0 +1,1789 @@
+/*
+ * USB Host Controller Driver for IMX21
+ *
+ * Copyright (C) 2006 Loping Dog Embedded Systems
+ * Copyright (C) 2009 Martin Fuzzey
+ * Originally written by Jay Monkman <jtm at lopingdog.com>
+ * Ported to 2.6.30, debugged and enhanced by Martin Fuzzey
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+ /*
+ * The i.MX21 USB hardware contains
+ * * 32 transfer descriptors (called ETDs)
+ * * 4Kb of Data memory
+ *
+ * The data memory is shared between the host and fuction controlers
+ * (but this driver only supports the host controler)
+ *
+ * So setting up a transfer involves:
+ * * Allocating a ETD
+ * * Fill in ETD with appropriate information
+ * * Allocating data memory (and putting the offset in the ETD)
+ * * Activate the ETD
+ * * Get interrupt when done.
+ *
+ * An ETD is assigned to each active endpoint.
+ *
+ * Low resource (ETD and Data memory) situations are handled differently for
+ * isochronous and non insosynchronous transactions :
+ *
+ * Non ISOC transfers are queued if either ETDs or Data memory are unavailable
+ *
+ * ISOC transfers use 2 ETDs per endpoint to achieve double buffering.
+ * They allocate both ETDs and Data memory during URB submission
+ * (and fail if unavailable).
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/usb.h>
+
+#include "../core/hcd.h"
+#include "imx21-hcd.h"
+
+#ifdef DEBUG
+#define DEBUG_LOG_FRAME(imx21, etd, event) \
+ (etd)->event##_frame = readl((imx21)->regs + USBH_FRMNUB)
+#else
+#define DEBUG_LOG_FRAME(imx21, etd, event) do { } while (0)
+#endif
+
+static const char hcd_name[] = "imx21-hcd";
+
+static inline struct imx21 *hcd_to_imx21(struct usb_hcd *hcd)
+{
+ return (struct imx21 *)hcd->hcd_priv;
+}
+
+
+/* =========================================== */
+/* Hardware access helpers */
+/* =========================================== */
+
+static inline void set_register_bits(struct imx21 *imx21, u32 offset, u32 mask)
+{
+ void __iomem *reg = imx21->regs + offset;
+ writel(readl(reg) | mask, reg);
+}
+
+static inline void clear_register_bits(struct imx21 *imx21,
+ u32 offset, u32 mask)
+{
+ void __iomem *reg = imx21->regs + offset;
+ writel(readl(reg) & ~mask, reg);
+}
+
+static inline void clear_toggle_bit(struct imx21 *imx21, u32 offset, u32 mask)
+{
+ void __iomem *reg = imx21->regs + offset;
+
+ if (readl(reg) & mask)
+ writel(mask, reg);
+}
+
+static inline void set_toggle_bit(struct imx21 *imx21, u32 offset, u32 mask)
+{
+ void __iomem *reg = imx21->regs + offset;
+
+ if (!(readl(reg) & mask))
+ writel(mask, reg);
+}
+
+static void etd_writel(struct imx21 *imx21, int etd_num, int dword, u32 value)
+{
+ writel(value, imx21->regs + USB_ETD_DWORD(etd_num, dword));
+}
+
+static u32 etd_readl(struct imx21 *imx21, int etd_num, int dword)
+{
+ return readl(imx21->regs + USB_ETD_DWORD(etd_num, dword));
+}
+
+static inline int wrap_frame(int counter)
+{
+ return counter & 0xFFFF;
+}
+
+static inline int frame_after(int frame, int after)
+{
+ /* handle wrapping like jiffies time_afer */
+ return (s16)((s16)after - (s16)frame) < 0;
+}
+
+static int imx21_hc_get_frame(struct usb_hcd *hcd)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+
+ return wrap_frame(readl(imx21->regs + USBH_FRMNUB));
+}
+
+
+#include "imx21-dbg.c"
+
+/* =========================================== */
+/* ETD management */
+/* =========================================== */
+
+static int alloc_etd(struct imx21 *imx21)
+{
+ int i;
+ struct etd_priv *etd = imx21->etd;
+
+ for (i = 0; i < USB_NUM_ETD; i++, etd++) {
+ if (etd->alloc == 0) {
+ memset(etd, 0, sizeof(imx21->etd[0]));
+ etd->alloc = 1;
+ debug_etd_allocated(imx21);
+ return i;
+ }
+ }
+ return -1;
+}
+
+static void disactivate_etd(struct imx21 *imx21, int num)
+{
+ int etd_mask = (1 << num);
+ struct etd_priv *etd = &imx21->etd[num];
+
+ writel(etd_mask, imx21->regs + USBH_ETDENCLR);
+ clear_register_bits(imx21, USBH_ETDDONEEN, etd_mask);
+ writel(etd_mask, imx21->regs + USB_ETDDMACHANLCLR);
+ clear_toggle_bit(imx21, USBH_ETDDONESTAT, etd_mask);
+
+ etd->active_count = 0;
+
+ DEBUG_LOG_FRAME(imx21, etd, disactivated);
+}
+
+static void reset_etd(struct imx21 *imx21, int num)
+{
+ struct etd_priv *etd = imx21->etd + num;
+ int i;
+
+ disactivate_etd(imx21, num);
+
+ for (i = 0; i < 4; i++)
+ etd_writel(imx21, num, i, 0);
+ etd->urb = NULL;
+ etd->ep = NULL;
+ etd->td = NULL;;
+}
+
+static void free_etd(struct imx21 *imx21, int num)
+{
+ if (num < 0)
+ return;
+
+ if (num >= USB_NUM_ETD) {
+ dev_err(imx21->dev, "BAD etd=%d!\n", num);
+ return;
+ }
+ if (imx21->etd[num].alloc == 0) {
+ dev_err(imx21->dev, "ETD %d already free!\n", num);
+ return;
+ }
+
+ debug_etd_freed(imx21);
+ reset_etd(imx21, num);
+ memset(&imx21->etd[num], 0, sizeof(imx21->etd[0]));
+}
+
+
+static void setup_etd_dword0(struct imx21 *imx21,
+ int etd_num, struct urb *urb, u8 dir, u16 maxpacket)
+{
+ etd_writel(imx21, etd_num, 0,
+ ((u32) usb_pipedevice(urb->pipe)) << DW0_ADDRESS |
+ ((u32) usb_pipeendpoint(urb->pipe) << DW0_ENDPNT) |
+ ((u32) dir << DW0_DIRECT) |
+ ((u32) ((urb->dev->speed == USB_SPEED_LOW) ?
+ 1 : 0) << DW0_SPEED) |
+ ((u32) fmt_urb_to_etd[usb_pipetype(urb->pipe)] << DW0_FORMAT) |
+ ((u32) maxpacket << DW0_MAXPKTSIZ));
+}
+
+static void activate_etd(struct imx21 *imx21,
+ int etd_num, dma_addr_t dma, u8 dir)
+{
+ u32 etd_mask = 1 << etd_num;
+ struct etd_priv *etd = &imx21->etd[etd_num];
+
+ clear_toggle_bit(imx21, USBH_ETDDONESTAT, etd_mask);
+ set_register_bits(imx21, USBH_ETDDONEEN, etd_mask);
+ clear_toggle_bit(imx21, USBH_XFILLSTAT, etd_mask);
+ clear_toggle_bit(imx21, USBH_YFILLSTAT, etd_mask);
+
+ if (dma) {
+ set_register_bits(imx21, USB_ETDDMACHANLCLR, etd_mask);
+ clear_toggle_bit(imx21, USBH_XBUFSTAT, etd_mask);
+ clear_toggle_bit(imx21, USBH_YBUFSTAT, etd_mask);
+ writel(dma, imx21->regs + USB_ETDSMSA(etd_num));
+ set_register_bits(imx21, USB_ETDDMAEN, etd_mask);
+ } else {
+ if (dir != TD_DIR_IN) {
+ /* need to set for ZLP */
+ set_toggle_bit(imx21, USBH_XFILLSTAT, etd_mask);
+ set_toggle_bit(imx21, USBH_YFILLSTAT, etd_mask);
+ }
+ }
+
+ DEBUG_LOG_FRAME(imx21, etd, activated);
+
+#ifdef DEBUG
+ if (!etd->active_count) {
+ int i;
+ etd->activated_frame = readl(imx21->regs + USBH_FRMNUB);
+ etd->disactivated_frame = -1;
+ etd->last_int_frame = -1;
+ etd->last_req_frame = -1;
+
+ for (i = 0; i < 4; i++)
+ etd->submitted_dwords[i] = etd_readl(imx21, etd_num, i);
+ }
+#endif
+
+ etd->active_count = 1;
+ writel(etd_mask, imx21->regs + USBH_ETDENSET);
+}
+
+/* =========================================== */
+/* Data memory management */
+/* =========================================== */
+
+static int alloc_dmem(struct imx21 *imx21, unsigned int size,
+ struct usb_host_endpoint *ep)
+{
+ unsigned int offset = 0;
+ struct imx21_dmem_area *area;
+ struct imx21_dmem_area *tmp;
+
+ size += (~size + 1) & 0x3; /* Round to 4 byte multiple */
+
+ if (size > DMEM_SIZE) {
+ dev_err(imx21->dev, "size=%d > DMEM_SIZE(%d)\n",
+ size, DMEM_SIZE);
+ return -EINVAL;
+ }
+
+ list_for_each_entry(tmp, &imx21->dmem_list, list) {
+ if ((size + offset) < offset)
+ goto fail;
+ if ((size + offset) <= tmp->offset)
+ break;
+ offset = tmp->size + tmp->offset;
+ if ((offset + size) > DMEM_SIZE)
+ goto fail;
+ }
+
+ area = kmalloc(sizeof(struct imx21_dmem_area), GFP_ATOMIC);
+ if (area == NULL)
+ return -ENOMEM;
+
+ area->ep = ep;
+ area->offset = offset;
+ area->size = size;
+ list_add_tail(&area->list, &tmp->list);
+ debug_dmem_allocated(imx21, size);
+ return offset;
+
+fail:
+ return -ENOMEM;
+}
+
+/* Memory now available for a queued ETD - activate it */
+static void activate_queued_etd(struct imx21 *imx21,
+ struct etd_priv *etd, u32 dmem_offset)
+{
+ struct urb_priv *urb_priv = etd->urb->hcpriv;
+ int etd_num = etd - &imx21->etd[0];
+ u32 maxpacket = etd_readl(imx21, etd_num, 1) >> DW1_YBUFSRTAD;
+ u8 dir = (etd_readl(imx21, etd_num, 2) >> DW2_DIRPID) & 0x03;
+
+ dev_dbg(imx21->dev, "activating queued ETD %d now DMEM available\n",
+ etd_num);
+ etd_writel(imx21, etd_num, 1,
+ ((dmem_offset + maxpacket) << DW1_YBUFSRTAD) | dmem_offset);
+
+ urb_priv->active = 1;
+ activate_etd(imx21, etd_num, etd->dma_handle, dir);
+}
+
+static void free_dmem(struct imx21 *imx21, int offset)
+{
+ struct imx21_dmem_area *area;
+ struct etd_priv *etd, *tmp;
+ int found = 0;
+
+ list_for_each_entry(area, &imx21->dmem_list, list) {
+ if (area->offset == offset) {
+ debug_dmem_freed(imx21, area->size);
+ list_del(&area->list);
+ kfree(area);
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ dev_err(imx21->dev,
+ "Trying to free unallocated DMEM %d\n", offset);
+ return;
+ }
+
+ /* Try again to allocate memory for anything we've queued */
+ list_for_each_entry_safe(etd, tmp, &imx21->queue_for_dmem, queue) {
+ offset = alloc_dmem(imx21, etd->dmem_size, etd->ep);
+ if (offset >= 0) {
+ list_del(&etd->queue);
+ activate_queued_etd(imx21, etd, (u32)offset);
+ }
+ }
+}
+
+static void free_epdmem(struct imx21 *imx21, struct usb_host_endpoint *ep)
+{
+ struct imx21_dmem_area *area, *tmp;
+
+ list_for_each_entry_safe(area, tmp, &imx21->dmem_list, list) {
+ if (area->ep == ep) {
+ dev_err(imx21->dev,
+ "Active DMEM %d for disabled ep=%p\n",
+ area->offset, ep);
+ list_del(&area->list);
+ kfree(area);
+ }
+ }
+}
+
+
+/* =========================================== */
+/* End handling */
+/* =========================================== */
+static void schedule_nonisoc_etd(struct imx21 *imx21, struct urb *urb);
+
+/* Endpoint now idle - release it's ETD(s) or asssign to queued request */
+static void ep_idle(struct imx21 *imx21, struct ep_priv *ep_priv)
+{
+ int etd_num;
+ int i;
+
+ for (i = 0; i < NUM_ISO_ETDS; i++) {
+ etd_num = ep_priv->etd[i];
+ if (etd_num < 0)
+ continue;
+
+ ep_priv->etd[i] = -1;
+ if (list_empty(&imx21->queue_for_etd)) {
+ free_etd(imx21, etd_num);
+ continue;
+ }
+
+ dev_dbg(imx21->dev,
+ "assigning idle etd %d for queued request\n", etd_num);
+ ep_priv = list_first_entry(&imx21->queue_for_etd,
+ struct ep_priv, queue);
+ list_del(&ep_priv->queue);
+ reset_etd(imx21, etd_num);
+ ep_priv->waiting_etd = 0;
+ ep_priv->etd[i] = etd_num;
+
+ if (list_empty(&ep_priv->ep->urb_list)) {
+ dev_err(imx21->dev, "No urb for queued ep!\n");
+ continue;
+ }
+ schedule_nonisoc_etd(imx21, list_first_entry(
+ &ep_priv->ep->urb_list, struct urb, urb_list));
+ }
+}
+
+static void urb_done(struct usb_hcd *hcd, struct urb *urb, int status)
+__releases(imx21->lock)
+__acquires(imx21->lock)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ struct ep_priv *ep_priv = urb->ep->hcpriv;
+ struct urb_priv *urb_priv = urb->hcpriv;
+
+ debug_urb_completed(imx21, urb, status);
+ dev_vdbg(imx21->dev, "urb %p done %d\n", urb, status);
+
+ kfree(urb_priv->isoc_td);
+ kfree(urb->hcpriv);
+ urb->hcpriv = NULL;
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+ spin_unlock(&imx21->lock);
+ usb_hcd_giveback_urb(hcd, urb, status);
+ spin_lock(&imx21->lock);
+ if (list_empty(&ep_priv->ep->urb_list))
+ ep_idle(imx21, ep_priv);
+}
+
+/* =========================================== */
+/* ISOC Handling ... */
+/* =========================================== */
+
+static void schedule_isoc_etds(struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ struct ep_priv *ep_priv = ep->hcpriv;
+ struct etd_priv *etd;
+ struct urb_priv *urb_priv;
+ struct td *td;
+ int etd_num;
+ int i;
+ int cur_frame;
+ u8 dir;
+
+ for (i = 0; i < NUM_ISO_ETDS; i++) {
+too_late:
+ if (list_empty(&ep_priv->td_list))
+ break;
+
+ etd_num = ep_priv->etd[i];
+ if (etd_num < 0)
+ break;
+
+ etd = &imx21->etd[etd_num];
+ if (etd->urb)
+ continue;
+
+ td = list_entry(ep_priv->td_list.next, struct td, list);
+ list_del(&td->list);
+ urb_priv = td->urb->hcpriv;
+
+ cur_frame = imx21_hc_get_frame(hcd);
+ if (frame_after(cur_frame, td->frame)) {
+ dev_dbg(imx21->dev, "isoc too late frame %d > %d\n",
+ cur_frame, td->frame);
+ urb_priv->isoc_status = -EXDEV;
+ td->urb->iso_frame_desc[
+ td->isoc_index].actual_length = 0;
+ td->urb->iso_frame_desc[td->isoc_index].status = -EXDEV;
+ if (--urb_priv->isoc_remaining == 0)
+ urb_done(hcd, td->urb, urb_priv->isoc_status);
+ goto too_late;
+ }
+
+ urb_priv->active = 1;
+ etd->td = td;
+ etd->ep = td->ep;
+ etd->urb = td->urb;
+ etd->len = td->len;
+
+ debug_isoc_submitted(imx21, cur_frame, td);
+
+ dir = usb_pipeout(td->urb->pipe) ? TD_DIR_OUT : TD_DIR_IN;
+ setup_etd_dword0(imx21, etd_num, td->urb, dir, etd->dmem_size);
+ etd_writel(imx21, etd_num, 1, etd->dmem_offset);
+ etd_writel(imx21, etd_num, 2,
+ (TD_NOTACCESSED << DW2_COMPCODE) |
+ ((td->frame & 0xFFFF) << DW2_STARTFRM));
+ etd_writel(imx21, etd_num, 3,
+ (TD_NOTACCESSED << DW3_COMPCODE0) |
+ (td->len << DW3_PKTLEN0));
+
+ activate_etd(imx21, etd_num, td->data, dir);
+ }
+}
+
+static void isoc_etd_done(struct usb_hcd *hcd, struct urb *urb, int etd_num)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ int etd_mask = 1 << etd_num;
+ struct urb_priv *urb_priv = urb->hcpriv;
+ struct etd_priv *etd = imx21->etd + etd_num;
+ struct td *td = etd->td;
+ struct usb_host_endpoint *ep = etd->ep;
+ int isoc_index = td->isoc_index;
+ unsigned int pipe = urb->pipe;
+ int dir_in = usb_pipein(pipe);
+ int cc;
+ int bytes_xfrd;
+
+ disactivate_etd(imx21, etd_num);
+
+ cc = (etd_readl(imx21, etd_num, 3) >> DW3_COMPCODE0) & 0xf;
+ bytes_xfrd = etd_readl(imx21, etd_num, 3) & 0x3ff;
+
+ /* Input doesn't always fill the buffer, don't generate an error
+ * when this happens.
+ */
+ if (dir_in && (cc == TD_DATAUNDERRUN))
+ cc = TD_CC_NOERROR;
+
+ if (cc == TD_NOTACCESSED)
+ bytes_xfrd = 0;
+
+ debug_isoc_completed(imx21,
+ imx21_hc_get_frame(hcd), td, cc, bytes_xfrd);
+ if (cc) {
+ urb_priv->isoc_status = -EXDEV;
+ dev_dbg(imx21->dev,
+ "bad iso cc=0x%X frame=%d sched frame=%d "
+ "cnt=%d len=%d urb=%p etd=%d index=%d\n",
+ cc, imx21_hc_get_frame(hcd), td->frame,
+ bytes_xfrd, td->len, urb, etd_num, isoc_index);
+ }
+
+ if (dir_in)
+ clear_toggle_bit(imx21, USBH_XFILLSTAT, etd_mask);
+
+ urb->actual_length += bytes_xfrd;
+ urb->iso_frame_desc[isoc_index].actual_length = bytes_xfrd;
+ urb->iso_frame_desc[isoc_index].status = cc_to_error[cc];
+
+ etd->td = NULL;
+ etd->urb = NULL;
+ etd->ep = NULL;
+
+ if (--urb_priv->isoc_remaining == 0)
+ urb_done(hcd, urb, urb_priv->isoc_status);
+
+ schedule_isoc_etds(hcd, ep);
+}
+
+static struct ep_priv *alloc_isoc_ep(
+ struct imx21 *imx21, struct usb_host_endpoint *ep)
+{
+ struct ep_priv *ep_priv;
+ int i;
+
+ ep_priv = kzalloc(sizeof(struct ep_priv), GFP_ATOMIC);
+ if (ep_priv == NULL)
+ return NULL;
+
+ /* Allocate the ETDs */
+ for (i = 0; i < NUM_ISO_ETDS; i++) {
+ ep_priv->etd[i] = alloc_etd(imx21);
+ if (ep_priv->etd[i] < 0) {
+ int j;
+ dev_err(imx21->dev, "isoc: Couldn't allocate etd\n");
+ for (j = 0; j < i; j++)
+ free_etd(imx21, ep_priv->etd[j]);
+ goto alloc_etd_failed;
+ }
+ imx21->etd[ep_priv->etd[i]].ep = ep;
+ }
+
+ INIT_LIST_HEAD(&ep_priv->td_list);
+ ep_priv->ep = ep;
+ ep->hcpriv = ep_priv;
+ return ep_priv;
+
+alloc_etd_failed:
+ kfree(ep_priv);
+ return NULL;
+}
+
+static int imx21_hc_urb_enqueue_isoc(struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep,
+ struct urb *urb, gfp_t mem_flags)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ struct urb_priv *urb_priv;
+ unsigned long flags;
+ struct ep_priv *ep_priv;
+ struct td *td = NULL;
+ int i;
+ int ret;
+ int cur_frame;
+ u16 maxpacket;
+
+ urb_priv = kzalloc(sizeof(struct urb_priv), mem_flags);
+ if (urb_priv == NULL)
+ return -ENOMEM;
+
+ urb_priv->isoc_td = kzalloc(
+ sizeof(struct td) * urb->number_of_packets, mem_flags);
+ if (urb_priv->isoc_td == NULL) {
+ ret = -ENOMEM;
+ goto alloc_td_failed;
+ }
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ if (ep->hcpriv == NULL) {
+ ep_priv = alloc_isoc_ep(imx21, ep);
+ if (ep_priv == NULL) {
+ ret = -ENOMEM;
+ goto alloc_ep_failed;
+ }
+ } else {
+ ep_priv = ep->hcpriv;
+ }
+
+ ret = usb_hcd_link_urb_to_ep(hcd, urb);
+ if (ret)
+ goto link_failed;
+
+ urb->status = -EINPROGRESS;
+ urb->actual_length = 0;
+ urb->error_count = 0;
+ urb->hcpriv = urb_priv;
+ urb_priv->ep = ep;
+
+ /* allocate data memory for largest packets if not already done */
+ maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
+ for (i = 0; i < NUM_ISO_ETDS; i++) {
+ struct etd_priv *etd = &imx21->etd[ep_priv->etd[i]];
+
+ if (etd->dmem_size > 0 && etd->dmem_size < maxpacket) {
+ /* not sure if this can really occur.... */
+ dev_err(imx21->dev, "increasing isoc buffer %d->%d\n",
+ etd->dmem_size, maxpacket);
+ ret = -EMSGSIZE;
+ goto alloc_dmem_failed;
+ }
+
+ if (etd->dmem_size == 0) {
+ etd->dmem_offset = alloc_dmem(imx21, maxpacket, ep);
+ if (etd->dmem_offset < 0) {
+ dev_dbg(imx21->dev, "failed alloc isoc dmem\n");
+ ret = -EAGAIN;
+ goto alloc_dmem_failed;
+ }
+ etd->dmem_size = maxpacket;
+ }
+ }
+
+ /* calculate frame */
+ cur_frame = imx21_hc_get_frame(hcd);
+ if (urb->transfer_flags & URB_ISO_ASAP) {
+ if (list_empty(&ep_priv->td_list))
+ urb->start_frame = cur_frame + 5;
+ else
+ urb->start_frame = list_entry(
+ ep_priv->td_list.prev,
+ struct td, list)->frame + urb->interval;
+ }
+ urb->start_frame = wrap_frame(urb->start_frame);
+ if (frame_after(cur_frame, urb->start_frame)) {
+ dev_dbg(imx21->dev,
+ "enqueue: adjusting iso start %d (cur=%d) asap=%d\n",
+ urb->start_frame, cur_frame,
+ (urb->transfer_flags & URB_ISO_ASAP) != 0);
+ urb->start_frame = wrap_frame(cur_frame + 1);
+ }
+
+ /* set up transfers */
+ td = urb_priv->isoc_td;
+ for (i = 0; i < urb->number_of_packets; i++, td++) {
+ td->ep = ep;
+ td->urb = urb;
+ td->len = urb->iso_frame_desc[i].length;
+ td->isoc_index = i;
+ td->frame = wrap_frame(urb->start_frame + urb->interval * i);
+ td->data = urb->transfer_dma + urb->iso_frame_desc[i].offset;
+ list_add_tail(&td->list, &ep_priv->td_list);
+ }
+
+ urb_priv->isoc_remaining = urb->number_of_packets;
+ dev_vdbg(imx21->dev, "setup %d packets for iso frame %d->%d\n",
+ urb->number_of_packets, urb->start_frame, td->frame);
+
+ debug_urb_submitted(imx21, urb);
+ schedule_isoc_etds(hcd, ep);
+
+ spin_unlock_irqrestore(&imx21->lock, flags);
+ return 0;
+
+alloc_dmem_failed:
+ usb_hcd_unlink_urb_from_ep(hcd, urb);
+
+link_failed:
+alloc_ep_failed:
+ spin_unlock_irqrestore(&imx21->lock, flags);
+ kfree(urb_priv->isoc_td);
+
+alloc_td_failed:
+ kfree(urb_priv);
+ return ret;
+}
+
+static void dequeue_isoc_urb(struct imx21 *imx21,
+ struct urb *urb, struct ep_priv *ep_priv)
+{
+ struct urb_priv *urb_priv = urb->hcpriv;
+ struct td *td, *tmp;
+ int i;
+
+ if (urb_priv->active) {
+ for (i = 0; i < NUM_ISO_ETDS; i++) {
+ int etd_num = ep_priv->etd[i];
+ if (etd_num != -1 && imx21->etd[etd_num].urb == urb) {
+ struct etd_priv *etd = imx21->etd + etd_num;
+
+ reset_etd(imx21, etd_num);
+ if (etd->dmem_size)
+ free_dmem(imx21, etd->dmem_offset);
+ etd->dmem_size = 0;
+ }
+ }
+ }
+
+ list_for_each_entry_safe(td, tmp, &ep_priv->td_list, list) {
+ if (td->urb == urb) {
+ dev_vdbg(imx21->dev, "removing td %p\n", td);
+ list_del(&td->list);
+ }
+ }
+}
+
+/* =========================================== */
+/* NON ISOC Handling ... */
+/* =========================================== */
+
+static void schedule_nonisoc_etd(struct imx21 *imx21, struct urb *urb)
+{
+ unsigned int pipe = urb->pipe;
+ struct urb_priv *urb_priv = urb->hcpriv;
+ struct ep_priv *ep_priv = urb_priv->ep->hcpriv;
+ int state = urb_priv->state;
+ int etd_num = ep_priv->etd[0];
+ struct etd_priv *etd;
+ int dmem_offset;
+ u32 count;
+ u16 etd_buf_size;
+ u16 maxpacket;
+ u8 dir;
+ u8 bufround;
+ u8 datatoggle;
+ u8 interval = 0;
+ u8 relpolpos = 0;
+
+ if (etd_num < 0) {
+ dev_err(imx21->dev, "No valid ETD\n");
+ return;
+ }
+ if (readl(imx21->regs + USBH_ETDENSET) & (1 << etd_num))
+ dev_err(imx21->dev, "submitting to active ETD %d\n", etd_num);
+
+ etd = &imx21->etd[etd_num];
+ maxpacket = usb_maxpacket(urb->dev, pipe, usb_pipeout(pipe));
+ if (!maxpacket)
+ maxpacket = 8;
+
+ if (usb_pipecontrol(pipe) && (state != US_CTRL_DATA)) {
+ if (state == US_CTRL_SETUP) {
+ dir = TD_DIR_SETUP;
+ etd->dma_handle = urb->setup_dma;
+ bufround = 0;
+ count = 8;
+ datatoggle = TD_TOGGLE_DATA0;
+ } else { /* US_CTRL_ACK */
+ dir = usb_pipeout(pipe) ? TD_DIR_IN : TD_DIR_OUT;
+ etd->dma_handle = urb->transfer_dma;
+ bufround = 0;
+ count = 0;
+ datatoggle = TD_TOGGLE_DATA1;
+ }
+ } else {
+ dir = usb_pipeout(pipe) ? TD_DIR_OUT : TD_DIR_IN;
+ bufround = (dir == TD_DIR_IN) ? 1 : 0;
+ etd->dma_handle = urb->transfer_dma;
+ if (usb_pipebulk(pipe) && (state == US_BULK0))
+ count = 0;
+ else
+ count = urb->transfer_buffer_length;
+
+ if (usb_pipecontrol(pipe)) {
+ datatoggle = TD_TOGGLE_DATA1;
+ } else {
+ if (usb_gettoggle(
+ urb->dev,
+ usb_pipeendpoint(urb->pipe),
+ usb_pipeout(urb->pipe)))
+ datatoggle = TD_TOGGLE_DATA1;
+ else
+ datatoggle = TD_TOGGLE_DATA0;
+ }
+ }
+
+ etd->urb = urb;
+ etd->ep = urb_priv->ep;
+ etd->len = count;
+
+ if (usb_pipeint(pipe)) {
+ interval = urb->interval;
+ relpolpos = (readl(imx21->regs + USBH_FRMNUB) + 1) & 0xff;
+ }
+
+ /* Write ETD to device memory */
+ setup_etd_dword0(imx21, etd_num, urb, dir, maxpacket);
+
+ etd_writel(imx21, etd_num, 2,
+ (u32) interval << DW2_POLINTERV |
+ ((u32) relpolpos << DW2_RELPOLPOS) |
+ ((u32) dir << DW2_DIRPID) |
+ ((u32) bufround << DW2_BUFROUND) |
+ ((u32) datatoggle << DW2_DATATOG) |
+ ((u32) TD_NOTACCESSED << DW2_COMPCODE));
+
+ /* DMA will always transfer buffer size even if TOBYCNT in DWORD3
+ is smaller. Make sure we don't overrun the buffer!
+ */
+ if (count && count < maxpacket)
+ etd_buf_size = count;
+ else
+ etd_buf_size = maxpacket;
+
+ etd_writel(imx21, etd_num, 3,
+ ((u32) (etd_buf_size - 1) << DW3_BUFSIZE) | (u32) count);
+
+ if (!count)
+ etd->dma_handle = 0;
+
+ /* allocate x and y buffer space at once */
+ etd->dmem_size = (count > maxpacket) ? maxpacket * 2 : maxpacket;
+ dmem_offset = alloc_dmem(imx21, etd->dmem_size, urb_priv->ep);
+ if (dmem_offset < 0) {
+ /* Setup everything we can in HW and update when we get DMEM */
+ etd_writel(imx21, etd_num, 1, (u32)maxpacket << 16);
+
+ dev_dbg(imx21->dev, "Queuing etd %d for DMEM\n", etd_num);
+ debug_urb_queued_for_dmem(imx21, urb);
+ list_add_tail(&etd->queue, &imx21->queue_for_dmem);
+ return;
+ }
+
+ etd_writel(imx21, etd_num, 1,
+ (((u32) dmem_offset + (u32) maxpacket) << DW1_YBUFSRTAD) |
+ (u32) dmem_offset);
+
+ urb_priv->active = 1;
+
+ /* enable the ETD to kick off transfer */
+ dev_vdbg(imx21->dev, "Activating etd %d for %d bytes %s\n",
+ etd_num, count, dir != TD_DIR_IN ? "out" : "in");
+ activate_etd(imx21, etd_num, etd->dma_handle, dir);
+
+}
+
+static void nonisoc_etd_done(struct usb_hcd *hcd, struct urb *urb, int etd_num)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ struct etd_priv *etd = &imx21->etd[etd_num];
+ u32 etd_mask = 1 << etd_num;
+ struct urb_priv *urb_priv = urb->hcpriv;
+ int dir;
+ u16 xbufaddr;
+ int cc;
+ u32 bytes_xfrd;
+ int etd_done;
+
+ disactivate_etd(imx21, etd_num);
+
+ dir = (etd_readl(imx21, etd_num, 0) >> DW0_DIRECT) & 0x3;
+ xbufaddr = etd_readl(imx21, etd_num, 1) & 0xffff;
+ cc = (etd_readl(imx21, etd_num, 2) >> DW2_COMPCODE) & 0xf;
+ bytes_xfrd = etd->len - (etd_readl(imx21, etd_num, 3) & 0x1fffff);
+
+ /* save toggle carry */
+ usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
+ usb_pipeout(urb->pipe),
+ (etd_readl(imx21, etd_num, 0) >> DW0_TOGCRY) & 0x1);
+
+ if (dir == TD_DIR_IN) {
+ clear_toggle_bit(imx21, USBH_XFILLSTAT, etd_mask);
+ clear_toggle_bit(imx21, USBH_YFILLSTAT, etd_mask);
+ }
+ free_dmem(imx21, xbufaddr);
+
+ urb->error_count = 0;
+ if (!(urb->transfer_flags & URB_SHORT_NOT_OK)
+ && (cc == TD_DATAUNDERRUN))
+ cc = TD_CC_NOERROR;
+
+ if (cc != 0)
+ dev_vdbg(imx21->dev, "cc is 0x%x\n", cc);
+
+ etd_done = (cc_to_error[cc] != 0); /* stop if error */
+
+ switch (usb_pipetype(urb->pipe)) {
+ case PIPE_CONTROL:
+ switch (urb_priv->state) {
+ case US_CTRL_SETUP:
+ if (urb->transfer_buffer_length > 0)
+ urb_priv->state = US_CTRL_DATA;
+ else
+ urb_priv->state = US_CTRL_ACK;
+ break;
+ case US_CTRL_DATA:
+ urb->actual_length += bytes_xfrd;
+ urb_priv->state = US_CTRL_ACK;
+ break;
+ case US_CTRL_ACK:
+ etd_done = 1;
+ break;
+ default:
+ dev_err(imx21->dev,
+ "Invalid pipe state %d\n", urb_priv->state);
+ etd_done = 1;
+ break;
+ }
+ break;
+
+ case PIPE_BULK:
+ urb->actual_length += bytes_xfrd;
+ if ((urb_priv->state == US_BULK)
+ && (urb->transfer_flags & URB_ZERO_PACKET)
+ && urb->transfer_buffer_length > 0
+ && ((urb->transfer_buffer_length %
+ usb_maxpacket(urb->dev, urb->pipe,
+ usb_pipeout(urb->pipe))) == 0)) {
+ /* need a 0-packet */
+ urb_priv->state = US_BULK0;
+ } else {
+ etd_done = 1;
+ }
+ break;
+
+ case PIPE_INTERRUPT:
+ urb->actual_length += bytes_xfrd;
+ etd_done = 1;
+ break;
+ }
+
+ if (!etd_done) {
+ dev_vdbg(imx21->dev, "next state=%d\n", urb_priv->state);
+ schedule_nonisoc_etd(imx21, urb);
+ } else {
+ struct usb_host_endpoint *ep = urb->ep;
+
+ urb_done(hcd, urb, cc_to_error[cc]);
+ etd->urb = NULL;
+
+ if (!list_empty(&ep->urb_list)) {
+ urb = list_first_entry(&ep->urb_list,
+ struct urb, urb_list);
+ dev_vdbg(imx21->dev, "next URB %p\n", urb);
+ schedule_nonisoc_etd(imx21, urb);
+ }
+ }
+}
+
+static struct ep_priv *alloc_ep(void)
+{
+ int i;
+ struct ep_priv *ep_priv;
+
+ ep_priv = kzalloc(sizeof(struct ep_priv), GFP_ATOMIC);
+ if (!ep_priv)
+ return NULL;
+
+ for (i = 0; i < NUM_ISO_ETDS; ++i)
+ ep_priv->etd[i] = -1;
+
+ return ep_priv;
+}
+
+static int imx21_hc_urb_enqueue(struct usb_hcd *hcd,
+ struct urb *urb, gfp_t mem_flags)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ struct usb_host_endpoint *ep = urb->ep;
+ struct urb_priv *urb_priv;
+ struct ep_priv *ep_priv;
+ struct etd_priv *etd;
+ int ret;
+ unsigned long flags;
+ int new_ep = 0;
+
+ dev_vdbg(imx21->dev,
+ "enqueue urb=%p ep=%p len=%d "
+ "buffer=%p dma=%08X setupBuf=%p setupDma=%08X\n",
+ urb, ep,
+ urb->transfer_buffer_length,
+ urb->transfer_buffer, urb->transfer_dma,
+ urb->setup_packet, urb->setup_dma);
+
+ if (usb_pipeisoc(urb->pipe))
+ return imx21_hc_urb_enqueue_isoc(hcd, ep, urb, mem_flags);
+
+ urb_priv = kzalloc(sizeof(struct urb_priv), mem_flags);
+ if (!urb_priv)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ ep_priv = ep->hcpriv;
+ if (ep_priv == NULL) {
+ ep_priv = alloc_ep();
+ if (!ep_priv) {
+ ret = -ENOMEM;
+ goto failed_alloc_ep;
+ }
+ ep->hcpriv = ep_priv;
+ ep_priv->ep = ep;
+ new_ep = 1;
+ }
+
+ ret = usb_hcd_link_urb_to_ep(hcd, urb);
+ if (ret)
+ goto failed_link;
+
+ urb->status = -EINPROGRESS;
+ urb->actual_length = 0;
+ urb->error_count = 0;
+ urb->hcpriv = urb_priv;
+ urb_priv->ep = ep;
+
+ switch (usb_pipetype(urb->pipe)) {
+ case PIPE_CONTROL:
+ urb_priv->state = US_CTRL_SETUP;
+ break;
+ case PIPE_BULK:
+ urb_priv->state = US_BULK;
+ break;
+ }
+
+ debug_urb_submitted(imx21, urb);
+ if (ep_priv->etd[0] < 0) {
+ if (ep_priv->waiting_etd) {
+ dev_dbg(imx21->dev,
+ "no ETD available already queued %p\n",
+ ep_priv);
+ debug_urb_queued_for_etd(imx21, urb);
+ goto out;
+ }
+ ep_priv->etd[0] = alloc_etd(imx21);
+ if (ep_priv->etd[0] < 0) {
+ dev_dbg(imx21->dev,
+ "no ETD available queueing %p\n", ep_priv);
+ debug_urb_queued_for_etd(imx21, urb);
+ list_add_tail(&ep_priv->queue, &imx21->queue_for_etd);
+ ep_priv->waiting_etd = 1;
+ goto out;
+ }
+ }
+
+ /* Schedule if no URB already active for this endpoint */
+ etd = &imx21->etd[ep_priv->etd[0]];
+ if (etd->urb == NULL) {
+ DEBUG_LOG_FRAME(imx21, etd, last_req);
+ schedule_nonisoc_etd(imx21, urb);
+ }
+
+out:
+ spin_unlock_irqrestore(&imx21->lock, flags);
+ return 0;
+
+failed_link:
+failed_alloc_ep:
+ spin_unlock_irqrestore(&imx21->lock, flags);
+ kfree(urb_priv);
+ return ret;
+}
+
+static int imx21_hc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
+ int status)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ unsigned long flags;
+ struct usb_host_endpoint *ep;
+ struct ep_priv *ep_priv;
+ struct urb_priv *urb_priv = urb->hcpriv;
+ int ret = -EINVAL;
+
+ dev_vdbg(imx21->dev, "dequeue urb=%p iso=%d status=%d\n",
+ urb, usb_pipeisoc(urb->pipe), status);
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ ret = usb_hcd_check_unlink_urb(hcd, urb, status);
+ if (ret)
+ goto fail;
+ ep = urb_priv->ep;
+ ep_priv = ep->hcpriv;
+
+ debug_urb_unlinked(imx21, urb);
+
+ if (usb_pipeisoc(urb->pipe)) {
+ dequeue_isoc_urb(imx21, urb, ep_priv);
+ schedule_isoc_etds(hcd, ep);
+ } else if (urb_priv->active) {
+ int etd_num = ep_priv->etd[0];
+ if (etd_num != -1) {
+ disactivate_etd(imx21, etd_num);
+ free_dmem(imx21, etd_readl(imx21, etd_num, 1) & 0xffff);
+ imx21->etd[etd_num].urb = NULL;
+ }
+ }
+
+ urb_done(hcd, urb, status);
+
+ spin_unlock_irqrestore(&imx21->lock, flags);
+ return 0;
+
+fail:
+ spin_unlock_irqrestore(&imx21->lock, flags);
+ return ret;
+}
+
+/* =========================================== */
+/* Interrupt dispatch */
+/* =========================================== */
+
+static void process_etds(struct usb_hcd *hcd, struct imx21 *imx21, int sof)
+{
+ int etd_num;
+ int enable_sof_int = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ for (etd_num = 0; etd_num < USB_NUM_ETD; etd_num++) {
+ u32 etd_mask = 1 << etd_num;
+ u32 enabled = readl(imx21->regs + USBH_ETDENSET) & etd_mask;
+ u32 done = readl(imx21->regs + USBH_ETDDONESTAT) & etd_mask;
+ struct etd_priv *etd = &imx21->etd[etd_num];
+
+
+ if (done) {
+ DEBUG_LOG_FRAME(imx21, etd, last_int);
+ } else {
+/*
+ * Kludge warning!
+ *
+ * When multiple transfers are using the bus we sometimes get into a state
+ * where the transfer has completed (the CC field of the ETD is != 0x0F),
+ * the ETD has self disabled but the ETDDONESTAT flag is not set
+ * (and hence no interrupt occurs).
+ * This causes the transfer in question to hang.
+ * The kludge below checks for this condition at each SOF and processes any
+ * blocked ETDs (after an arbitary 10 frame wait)
+ *
+ * With a single active transfer the usbtest test suite will run for days
+ * without the kludge.
+ * With other bus activity (eg mass storage) even just test1 will hang without
+ * the kludge.
+ */
+ u32 dword0;
+ int cc;
+
+ if (etd->active_count && !enabled) /* suspicious... */
+ enable_sof_int = 1;
+
+ if (!sof || enabled || !etd->active_count)
+ continue;
+
+ cc = etd_readl(imx21, etd_num, 2) >> DW2_COMPCODE;
+ if (cc == TD_NOTACCESSED)
+ continue;
+
+ if (++etd->active_count < 10)
+ continue;
+
+ dword0 = etd_readl(imx21, etd_num, 0);
+ dev_dbg(imx21->dev,
+ "unblock ETD %d dev=0x%X ep=0x%X cc=0x%02X!\n",
+ etd_num, dword0 & 0x7F,
+ (dword0 >> DW0_ENDPNT) & 0x0F,
+ cc);
+
+#ifdef DEBUG
+ dev_dbg(imx21->dev,
+ "frame: act=%d disact=%d"
+ " int=%d req=%d cur=%d\n",
+ etd->activated_frame,
+ etd->disactivated_frame,
+ etd->last_int_frame,
+ etd->last_req_frame,
+ readl(imx21->regs + USBH_FRMNUB));
+ imx21->debug_unblocks++;
+#endif
+ etd->active_count = 0;
+/* End of kludge */
+ }
+
+ if (etd->ep == NULL || etd->urb == NULL) {
+ dev_dbg(imx21->dev,
+ "Interrupt for unexpected etd %d"
+ " ep=%p urb=%p\n",
+ etd_num, etd->ep, etd->urb);
+ disactivate_etd(imx21, etd_num);
+ continue;
+ }
+
+ if (usb_pipeisoc(etd->urb->pipe))
+ isoc_etd_done(hcd, etd->urb, etd_num);
+ else
+ nonisoc_etd_done(hcd, etd->urb, etd_num);
+ }
+
+ /* only enable SOF interrupt if it may be needed for the kludge */
+ if (enable_sof_int)
+ set_register_bits(imx21, USBH_SYSIEN, USBH_SYSIEN_SOFINT);
+ else
+ clear_register_bits(imx21, USBH_SYSIEN, USBH_SYSIEN_SOFINT);
+
+
+ spin_unlock_irqrestore(&imx21->lock, flags);
+}
+
+static irqreturn_t imx21_irq(struct usb_hcd *hcd)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ u32 ints = readl(imx21->regs + USBH_SYSISR);
+
+ if (ints & USBH_SYSIEN_HERRINT)
+ dev_dbg(imx21->dev, "Scheduling error\n");
+
+ if (ints & USBH_SYSIEN_SORINT)
+ dev_dbg(imx21->dev, "Scheduling overrun\n");
+
+ if (ints & (USBH_SYSISR_DONEINT | USBH_SYSISR_SOFINT))
+ process_etds(hcd, imx21, ints & USBH_SYSISR_SOFINT);
+
+ writel(ints, imx21->regs + USBH_SYSISR);
+ return IRQ_HANDLED;
+}
+
+static void imx21_hc_endpoint_disable(struct usb_hcd *hcd,
+ struct usb_host_endpoint *ep)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ unsigned long flags;
+ struct ep_priv *ep_priv;
+ int i;
+
+ if (ep == NULL)
+ return;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+ ep_priv = ep->hcpriv;
+ dev_vdbg(imx21->dev, "disable ep=%p, ep->hcpriv=%p\n", ep, ep_priv);
+
+ if (!list_empty(&ep->urb_list))
+ dev_dbg(imx21->dev, "ep's URB list is not empty\n");
+
+ if (ep_priv != NULL) {
+ for (i = 0; i < NUM_ISO_ETDS; i++) {
+ if (ep_priv->etd[i] > -1)
+ dev_dbg(imx21->dev, "free etd %d for disable\n",
+ ep_priv->etd[i]);
+
+ free_etd(imx21, ep_priv->etd[i]);
+ }
+ kfree(ep_priv);
+ ep->hcpriv = NULL;
+ }
+
+ for (i = 0; i < USB_NUM_ETD; i++) {
+ if (imx21->etd[i].alloc && imx21->etd[i].ep == ep) {
+ dev_err(imx21->dev,
+ "Active etd %d for disabled ep=%p!\n", i, ep);
+ free_etd(imx21, i);
+ }
+ }
+ free_epdmem(imx21, ep);
+ spin_unlock_irqrestore(&imx21->lock, flags);
+}
+
+/* =========================================== */
+/* Hub handling */
+/* =========================================== */
+
+static int get_hub_descriptor(struct usb_hcd *hcd,
+ struct usb_hub_descriptor *desc)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ desc->bDescriptorType = 0x29; /* HUB descriptor */
+ desc->bHubContrCurrent = 0;
+
+ desc->bNbrPorts = readl(imx21->regs + USBH_ROOTHUBA)
+ & USBH_ROOTHUBA_NDNSTMPRT_MASK;
+ desc->bDescLength = 9;
+ desc->bPwrOn2PwrGood = 0;
+ desc->wHubCharacteristics = (__force __u16) cpu_to_le16(
+ 0x0002 | /* No power switching */
+ 0x0010 | /* No over current protection */
+ 0);
+
+ desc->bitmap[0] = 1 << 1;
+ desc->bitmap[1] = ~0;
+ return 0;
+}
+
+static int imx21_hc_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ int ports;
+ int changed = 0;
+ int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+ ports = readl(imx21->regs + USBH_ROOTHUBA)
+ & USBH_ROOTHUBA_NDNSTMPRT_MASK;
+ if (ports > 7) {
+ ports = 7;
+ dev_err(imx21->dev, "ports %d > 7\n", ports);
+ }
+ for (i = 0; i < ports; i++) {
+ if (readl(imx21->regs + USBH_PORTSTAT(i)) &
+ (USBH_PORTSTAT_CONNECTSC |
+ USBH_PORTSTAT_PRTENBLSC |
+ USBH_PORTSTAT_PRTSTATSC |
+ USBH_PORTSTAT_OVRCURIC |
+ USBH_PORTSTAT_PRTRSTSC)) {
+
+ changed = 1;
+ buf[0] |= 1 << (i + 1);
+ }
+ }
+ spin_unlock_irqrestore(&imx21->lock, flags);
+
+ if (changed)
+ dev_info(imx21->dev, "Hub status changed\n");
+ return changed;
+}
+
+static int imx21_hc_hub_control(struct usb_hcd *hcd,
+ u16 typeReq,
+ u16 wValue, u16 wIndex, char *buf, u16 wLength)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ int rc = 0;
+ u32 status_write = 0;
+
+ switch (typeReq) {
+ case ClearHubFeature:
+ dev_dbg(imx21->dev, "ClearHubFeature\n");
+ switch (wValue) {
+ case C_HUB_OVER_CURRENT:
+ dev_dbg(imx21->dev, " OVER_CURRENT\n");
+ break;
+ case C_HUB_LOCAL_POWER:
+ dev_dbg(imx21->dev, " LOCAL_POWER\n");
+ break;
+ default:
+ dev_dbg(imx21->dev, " unknown\n");
+ rc = -EINVAL;
+ break;
+ }
+ break;
+
+ case ClearPortFeature:
+ dev_dbg(imx21->dev, "ClearPortFeature\n");
+ switch (wValue) {
+ case USB_PORT_FEAT_ENABLE:
+ dev_dbg(imx21->dev, " ENABLE\n");
+ status_write = USBH_PORTSTAT_CURCONST;
+ break;
+ case USB_PORT_FEAT_SUSPEND:
+ dev_dbg(imx21->dev, " SUSPEND\n");
+ status_write = USBH_PORTSTAT_PRTOVRCURI;
+ break;
+ case USB_PORT_FEAT_POWER:
+ dev_dbg(imx21->dev, " POWER\n");
+ status_write = USBH_PORTSTAT_LSDEVCON;
+ break;
+ case USB_PORT_FEAT_C_ENABLE:
+ dev_dbg(imx21->dev, " C_ENABLE\n");
+ status_write = USBH_PORTSTAT_PRTENBLSC;
+ break;
+ case USB_PORT_FEAT_C_SUSPEND:
+ dev_dbg(imx21->dev, " C_SUSPEND\n");
+ status_write = USBH_PORTSTAT_PRTSTATSC;
+ break;
+ case USB_PORT_FEAT_C_CONNECTION:
+ dev_dbg(imx21->dev, " C_CONNECTION\n");
+ status_write = USBH_PORTSTAT_CONNECTSC;
+ break;
+ case USB_PORT_FEAT_C_OVER_CURRENT:
+ dev_dbg(imx21->dev, " C_OVER_CURRENT\n");
+ status_write = USBH_PORTSTAT_OVRCURIC;
+ break;
+ case USB_PORT_FEAT_C_RESET:
+ dev_dbg(imx21->dev, " C_RESET\n");
+ status_write = USBH_PORTSTAT_PRTRSTSC;
+ break;
+ default:
+ dev_dbg(imx21->dev, " unknown\n");
+ rc = -EINVAL;
+ break;
+ }
+
+ break;
+
+ case GetHubDescriptor:
+ dev_dbg(imx21->dev, "GetHubDescriptor\n");
+ rc = get_hub_descriptor(hcd, (void *)buf);
+ break;
+
+ case GetHubStatus:
+ dev_dbg(imx21->dev, " GetHubStatus\n");
+ *(__le32 *) buf = 0;
+ break;
+
+ case GetPortStatus:
+ dev_dbg(imx21->dev, "GetPortStatus: port: %d, 0x%x\n",
+ wIndex, USBH_PORTSTAT(wIndex - 1));
+ *(__le32 *) buf = readl(imx21->regs +
+ USBH_PORTSTAT(wIndex - 1));
+ break;
+
+ case SetHubFeature:
+ dev_dbg(imx21->dev, "SetHubFeature\n");
+ switch (wValue) {
+ case C_HUB_OVER_CURRENT:
+ dev_dbg(imx21->dev, " OVER_CURRENT\n");
+ break;
+
+ case C_HUB_LOCAL_POWER:
+ dev_dbg(imx21->dev, " LOCAL_POWER\n");
+ break;
+ default:
+ dev_dbg(imx21->dev, " unknown\n");
+ rc = -EINVAL;
+ break;
+ }
+
+ break;
+
+ case SetPortFeature:
+ dev_dbg(imx21->dev, "SetPortFeature\n");
+ switch (wValue) {
+ case USB_PORT_FEAT_SUSPEND:
+ dev_dbg(imx21->dev, " SUSPEND\n");
+ status_write = USBH_PORTSTAT_PRTSUSPST;
+ break;
+ case USB_PORT_FEAT_POWER:
+ dev_dbg(imx21->dev, " POWER\n");
+ status_write = USBH_PORTSTAT_PRTPWRST;
+ break;
+ case USB_PORT_FEAT_RESET:
+ dev_dbg(imx21->dev, " RESET\n");
+ status_write = USBH_PORTSTAT_PRTRSTST;
+ break;
+ default:
+ dev_dbg(imx21->dev, " unknown\n");
+ rc = -EINVAL;
+ break;
+ }
+ break;
+
+ default:
+ dev_dbg(imx21->dev, " unknown\n");
+ rc = -EINVAL;
+ break;
+ }
+
+ if (status_write)
+ writel(status_write, imx21->regs + USBH_PORTSTAT(wIndex - 1));
+ return rc;
+}
+
+/* =========================================== */
+/* Host controller management */
+/* =========================================== */
+
+static int imx21_hc_reset(struct usb_hcd *hcd)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ unsigned long timeout;
+ unsigned long flags;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ /* Reset the Host controler modules */
+ writel(USBOTG_RST_RSTCTRL | USBOTG_RST_RSTRH |
+ USBOTG_RST_RSTHSIE | USBOTG_RST_RSTHC,
+ imx21->regs + USBOTG_RST_CTRL);
+
+ /* Wait for reset to finish */
+ timeout = jiffies + HZ;
+ while (readl(imx21->regs + USBOTG_RST_CTRL) != 0) {
+ if (time_after(jiffies, timeout)) {
+ spin_unlock_irqrestore(&imx21->lock, flags);
+ dev_err(imx21->dev, "timeout waiting for reset\n");
+ return -ETIMEDOUT;
+ }
+ spin_unlock_irq(&imx21->lock);
+ schedule_timeout(1);
+ spin_lock_irq(&imx21->lock);
+ }
+ spin_unlock_irqrestore(&imx21->lock, flags);
+ return 0;
+}
+
+static int __devinit imx21_hc_start(struct usb_hcd *hcd)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ unsigned long flags;
+ int i, j;
+ u32 hw_mode = USBOTG_HWMODE_CRECFG_HOST;
+ u32 usb_control = 0;
+
+ hw_mode |= ((imx21->pdata->host_xcvr << USBOTG_HWMODE_HOSTXCVR_SHIFT) &
+ USBOTG_HWMODE_HOSTXCVR_MASK);
+ hw_mode |= ((imx21->pdata->otg_xcvr << USBOTG_HWMODE_OTGXCVR_SHIFT) &
+ USBOTG_HWMODE_OTGXCVR_MASK);
+
+ if (imx21->pdata->host1_txenoe)
+ usb_control |= USBCTRL_HOST1_TXEN_OE;
+
+ if (!imx21->pdata->host1_xcverless)
+ usb_control |= USBCTRL_HOST1_BYP_TLL;
+
+ if (imx21->pdata->otg_ext_xcvr)
+ usb_control |= USBCTRL_OTC_RCV_RXDP;
+
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ writel((USBOTG_CLK_CTRL_HST | USBOTG_CLK_CTRL_MAIN),
+ imx21->regs + USBOTG_CLK_CTRL);
+ writel(hw_mode, imx21->regs + USBOTG_HWMODE);
+ writel(usb_control, imx21->regs + USBCTRL);
+ writel(USB_MISCCONTROL_SKPRTRY | USB_MISCCONTROL_ARBMODE,
+ imx21->regs + USB_MISCCONTROL);
+
+ /* Clear the ETDs */
+ for (i = 0; i < USB_NUM_ETD; i++)
+ for (j = 0; j < 4; j++)
+ etd_writel(imx21, i, j, 0);
+
+ /* Take the HC out of reset */
+ writel(USBH_HOST_CTRL_HCUSBSTE_OPERATIONAL | USBH_HOST_CTRL_CTLBLKSR_1,
+ imx21->regs + USBH_HOST_CTRL);
+
+ /* Enable ports */
+ if (imx21->pdata->enable_otg_host)
+ writel(USBH_PORTSTAT_PRTPWRST | USBH_PORTSTAT_PRTENABST,
+ imx21->regs + USBH_PORTSTAT(0));
+
+ if (imx21->pdata->enable_host1)
+ writel(USBH_PORTSTAT_PRTPWRST | USBH_PORTSTAT_PRTENABST,
+ imx21->regs + USBH_PORTSTAT(1));
+
+ if (imx21->pdata->enable_host2)
+ writel(USBH_PORTSTAT_PRTPWRST | USBH_PORTSTAT_PRTENABST,
+ imx21->regs + USBH_PORTSTAT(2));
+
+
+ hcd->state = HC_STATE_RUNNING;
+
+ /* Enable host controller interrupts */
+ set_register_bits(imx21, USBH_SYSIEN,
+ USBH_SYSIEN_HERRINT |
+ USBH_SYSIEN_DONEINT | USBH_SYSIEN_SORINT);
+ set_register_bits(imx21, USBOTG_CINT_STEN, USBOTG_HCINT);
+
+ spin_unlock_irqrestore(&imx21->lock, flags);
+
+ return 0;
+}
+
+static void imx21_hc_stop(struct usb_hcd *hcd)
+{
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ unsigned long flags;
+
+ spin_lock_irqsave(&imx21->lock, flags);
+
+ writel(0, imx21->regs + USBH_SYSIEN);
+ clear_register_bits(imx21, USBOTG_CINT_STEN, USBOTG_HCINT);
+ clear_register_bits(imx21, USBOTG_CLK_CTRL_HST | USBOTG_CLK_CTRL_MAIN,
+ USBOTG_CLK_CTRL);
+ spin_unlock_irqrestore(&imx21->lock, flags);
+}
+
+/* =========================================== */
+/* Driver glue */
+/* =========================================== */
+
+static struct hc_driver imx21_hc_driver = {
+ .description = hcd_name,
+ .product_desc = "IMX21 USB Host Controller",
+ .hcd_priv_size = sizeof(struct imx21),
+
+ .flags = HCD_USB11,
+ .irq = imx21_irq,
+
+ .reset = imx21_hc_reset,
+ .start = imx21_hc_start,
+ .stop = imx21_hc_stop,
+
+ /* I/O requests */
+ .urb_enqueue = imx21_hc_urb_enqueue,
+ .urb_dequeue = imx21_hc_urb_dequeue,
+ .endpoint_disable = imx21_hc_endpoint_disable,
+
+ /* scheduling support */
+ .get_frame_number = imx21_hc_get_frame,
+
+ /* Root hub support */
+ .hub_status_data = imx21_hc_hub_status_data,
+ .hub_control = imx21_hc_hub_control,
+
+};
+
+static struct mx21_usbh_platform_data default_pdata = {
+ .host_xcvr = MX21_USBXCVR_TXDIF_RXDIF,
+ .otg_xcvr = MX21_USBXCVR_TXDIF_RXDIF,
+ .enable_host1 = 1,
+ .enable_host2 = 1,
+ .enable_otg_host = 1,
+
+};
+
+static int imx21_remove(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
+ struct imx21 *imx21 = hcd_to_imx21(hcd);
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ remove_debug_files(imx21);
+ usb_remove_hcd(hcd);
+
+ if (res != NULL) {
+ clk_disable(imx21->clk);
+ clk_put(imx21->clk);
+ iounmap(imx21->regs);
+ release_mem_region(res->start, resource_size(res));
+ }
+
+ kfree(hcd);
+ return 0;
+}
+
+
+static int imx21_probe(struct platform_device *pdev)
+{
+ struct usb_hcd *hcd;
+ struct imx21 *imx21;
+ struct resource *res;
+ int ret;
+ int irq;
+
+ printk(KERN_INFO "%s\n", imx21_hc_driver.product_desc);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -ENXIO;
+
+ hcd = usb_create_hcd(&imx21_hc_driver,
+ &pdev->dev, dev_name(&pdev->dev));
+ if (hcd == NULL) {
+ dev_err(&pdev->dev, "Cannot create hcd (%s)\n",
+ dev_name(&pdev->dev));
+ return -ENOMEM;
+ }
+
+ imx21 = hcd_to_imx21(hcd);
+ imx21->dev = &pdev->dev;
+ imx21->pdata = pdev->dev.platform_data;
+ if (!imx21->pdata)
+ imx21->pdata = &default_pdata;
+
+ spin_lock_init(&imx21->lock);
+ INIT_LIST_HEAD(&imx21->dmem_list);
+ INIT_LIST_HEAD(&imx21->queue_for_etd);
+ INIT_LIST_HEAD(&imx21->queue_for_dmem);
+ create_debug_files(imx21);
+
+ res = request_mem_region(res->start, resource_size(res), hcd_name);
+ if (!res) {
+ ret = -EBUSY;
+ goto failed_request_mem;
+ }
+
+ imx21->regs = ioremap(res->start, resource_size(res));
+ if (imx21->regs == NULL) {
+ dev_err(imx21->dev, "Cannot map registers\n");
+ ret = -ENOMEM;
+ goto failed_ioremap;
+ }
+
+ /* Enable clocks source */
+ imx21->clk = clk_get(imx21->dev, NULL);
+ if (IS_ERR(imx21->clk)) {
+ dev_err(imx21->dev, "no clock found\n");
+ ret = PTR_ERR(imx21->clk);
+ goto failed_clock_get;
+ }
+
+ ret = clk_set_rate(imx21->clk, clk_round_rate(imx21->clk, 48000000));
+ if (ret)
+ goto failed_clock_set;
+ ret = clk_enable(imx21->clk);
+ if (ret)
+ goto failed_clock_enable;
+
+ dev_info(imx21->dev, "Hardware HC revision: 0x%02X\n",
+ (readl(imx21->regs + USBOTG_HWMODE) >> 16) & 0xFF);
+
+ ret = usb_add_hcd(hcd, irq, IRQF_DISABLED);
+ if (ret != 0) {
+ dev_err(imx21->dev, "usb_add_hcd() returned %d\n", ret);
+ goto failed_add_hcd;
+ }
+
+ return 0;
+
+failed_add_hcd:
+ clk_disable(imx21->clk);
+failed_clock_enable:
+failed_clock_set:
+ clk_put(imx21->clk);
+failed_clock_get:
+ iounmap(imx21->regs);
+failed_ioremap:
+ release_mem_region(res->start, res->end - res->start);
+failed_request_mem:
+ remove_debug_files(imx21);
+ usb_put_hcd(hcd);
+ return ret;
+}
+
+static struct platform_driver imx21_hcd_driver = {
+ .driver = {
+ .name = (char *)hcd_name,
+ },
+ .probe = imx21_probe,
+ .remove = imx21_remove,
+ .suspend = NULL,
+ .resume = NULL,
+};
+
+static int __init imx21_hcd_init(void)
+{
+ return platform_driver_register(&imx21_hcd_driver);
+}
+
+static void __exit imx21_hcd_cleanup(void)
+{
+ platform_driver_unregister(&imx21_hcd_driver);
+}
+
+module_init(imx21_hcd_init);
+module_exit(imx21_hcd_cleanup);
+
+MODULE_DESCRIPTION("i.MX21 USB Host controller");
+MODULE_AUTHOR("Martin Fuzzey");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imx21-hcd");
diff --git a/drivers/usb/host/imx21-hcd.h b/drivers/usb/host/imx21-hcd.h
new file mode 100644
index 0000000..1b0d913
--- /dev/null
+++ b/drivers/usb/host/imx21-hcd.h
@@ -0,0 +1,436 @@
+/*
+ * Macros and prototypes for i.MX21
+ *
+ * Copyright (C) 2006 Loping Dog Embedded Systems
+ * Copyright (C) 2009 Martin Fuzzey
+ * Originally written by Jay Monkman <jtm at lopingdog.com>
+ * Ported to 2.6.30, debugged and enhanced by Martin Fuzzey
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __LINUX_IMX21_HCD_H__
+#define __LINUX_IMX21_HCD_H__
+
+#include <mach/mx21-usbhost.h>
+
+#define NUM_ISO_ETDS 2
+#define USB_NUM_ETD 32
+#define DMEM_SIZE 4096
+
+/* Register definitions */
+#define USBOTG_HWMODE 0x00
+#define USBOTG_HWMODE_ANASDBEN (1 << 14)
+#define USBOTG_HWMODE_OTGXCVR_SHIFT 6
+#define USBOTG_HWMODE_OTGXCVR_MASK (3 << 6)
+#define USBOTG_HWMODE_OTGXCVR_TD_RD (0 << 6)
+#define USBOTG_HWMODE_OTGXCVR_TS_RD (2 << 6)
+#define USBOTG_HWMODE_OTGXCVR_TD_RS (1 << 6)
+#define USBOTG_HWMODE_OTGXCVR_TS_RS (3 << 6)
+#define USBOTG_HWMODE_HOSTXCVR_SHIFT 4
+#define USBOTG_HWMODE_HOSTXCVR_MASK (3 << 4)
+#define USBOTG_HWMODE_HOSTXCVR_TD_RD (0 << 4)
+#define USBOTG_HWMODE_HOSTXCVR_TS_RD (2 << 4)
+#define USBOTG_HWMODE_HOSTXCVR_TD_RS (1 << 4)
+#define USBOTG_HWMODE_HOSTXCVR_TS_RS (3 << 4)
+#define USBOTG_HWMODE_CRECFG_MASK (3 << 0)
+#define USBOTG_HWMODE_CRECFG_HOST (1 << 0)
+#define USBOTG_HWMODE_CRECFG_FUNC (2 << 0)
+#define USBOTG_HWMODE_CRECFG_HNP (3 << 0)
+
+#define USBOTG_CINT_STAT 0x04
+#define USBOTG_CINT_STEN 0x08
+#define USBOTG_ASHNPINT (1 << 5)
+#define USBOTG_ASFCINT (1 << 4)
+#define USBOTG_ASHCINT (1 << 3)
+#define USBOTG_SHNPINT (1 << 2)
+#define USBOTG_FCINT (1 << 1)
+#define USBOTG_HCINT (1 << 0)
+
+#define USBOTG_CLK_CTRL 0x0c
+#define USBOTG_CLK_CTRL_FUNC (1 << 2)
+#define USBOTG_CLK_CTRL_HST (1 << 1)
+#define USBOTG_CLK_CTRL_MAIN (1 << 0)
+
+#define USBOTG_RST_CTRL 0x10
+#define USBOTG_RST_RSTI2C (1 << 15)
+#define USBOTG_RST_RSTCTRL (1 << 5)
+#define USBOTG_RST_RSTFC (1 << 4)
+#define USBOTG_RST_RSTFSKE (1 << 3)
+#define USBOTG_RST_RSTRH (1 << 2)
+#define USBOTG_RST_RSTHSIE (1 << 1)
+#define USBOTG_RST_RSTHC (1 << 0)
+
+#define USBOTG_FRM_INTVL 0x14
+#define USBOTG_FRM_REMAIN 0x18
+#define USBOTG_HNP_CSR 0x1c
+#define USBOTG_HNP_ISR 0x2c
+#define USBOTG_HNP_IEN 0x30
+
+#define USBOTG_I2C_TXCVR_REG(x) (0x100 + (x))
+#define USBOTG_I2C_XCVR_DEVAD 0x118
+#define USBOTG_I2C_SEQ_OP_REG 0x119
+#define USBOTG_I2C_SEQ_RD_STARTAD 0x11a
+#define USBOTG_I2C_OP_CTRL_REG 0x11b
+#define USBOTG_I2C_SCLK_TO_SCK_HPER 0x11e
+#define USBOTG_I2C_MASTER_INT_REG 0x11f
+
+#define USBH_HOST_CTRL 0x80
+#define USBH_HOST_CTRL_HCRESET (1 << 31)
+#define USBH_HOST_CTRL_SCHDOVR(x) ((x) << 16)
+#define USBH_HOST_CTRL_RMTWUEN (1 << 4)
+#define USBH_HOST_CTRL_HCUSBSTE_RESET (0 << 2)
+#define USBH_HOST_CTRL_HCUSBSTE_RESUME (1 << 2)
+#define USBH_HOST_CTRL_HCUSBSTE_OPERATIONAL (2 << 2)
+#define USBH_HOST_CTRL_HCUSBSTE_SUSPEND (3 << 2)
+#define USBH_HOST_CTRL_CTLBLKSR_1 (0 << 0)
+#define USBH_HOST_CTRL_CTLBLKSR_2 (1 << 0)
+#define USBH_HOST_CTRL_CTLBLKSR_3 (2 << 0)
+#define USBH_HOST_CTRL_CTLBLKSR_4 (3 << 0)
+
+#define USBH_SYSISR 0x88
+#define USBH_SYSISR_PSCINT (1 << 6)
+#define USBH_SYSISR_FMOFINT (1 << 5)
+#define USBH_SYSISR_HERRINT (1 << 4)
+#define USBH_SYSISR_RESDETINT (1 << 3)
+#define USBH_SYSISR_SOFINT (1 << 2)
+#define USBH_SYSISR_DONEINT (1 << 1)
+#define USBH_SYSISR_SORINT (1 << 0)
+
+#define USBH_SYSIEN 0x8c
+#define USBH_SYSIEN_PSCINT (1 << 6)
+#define USBH_SYSIEN_FMOFINT (1 << 5)
+#define USBH_SYSIEN_HERRINT (1 << 4)
+#define USBH_SYSIEN_RESDETINT (1 << 3)
+#define USBH_SYSIEN_SOFINT (1 << 2)
+#define USBH_SYSIEN_DONEINT (1 << 1)
+#define USBH_SYSIEN_SORINT (1 << 0)
+
+#define USBH_XBUFSTAT 0x98
+#define USBH_YBUFSTAT 0x9c
+#define USBH_XYINTEN 0xa0
+#define USBH_XFILLSTAT 0xa8
+#define USBH_YFILLSTAT 0xac
+#define USBH_ETDENSET 0xc0
+#define USBH_ETDENCLR 0xc4
+#define USBH_IMMEDINT 0xcc
+#define USBH_ETDDONESTAT 0xd0
+#define USBH_ETDDONEEN 0xd4
+#define USBH_FRMNUB 0xe0
+#define USBH_LSTHRESH 0xe4
+
+#define USBH_ROOTHUBA 0xe8
+#define USBH_ROOTHUBA_PWRTOGOOD_MASK (0xff)
+#define USBH_ROOTHUBA_PWRTOGOOD_SHIFT (24)
+#define USBH_ROOTHUBA_NOOVRCURP (1 << 12)
+#define USBH_ROOTHUBA_OVRCURPM (1 << 11)
+#define USBH_ROOTHUBA_DEVTYPE (1 << 10)
+#define USBH_ROOTHUBA_PWRSWTMD (1 << 9)
+#define USBH_ROOTHUBA_NOPWRSWT (1 << 8)
+#define USBH_ROOTHUBA_NDNSTMPRT_MASK (0xff)
+
+#define USBH_ROOTHUBB 0xec
+#define USBH_ROOTHUBB_PRTPWRCM(x) (1 << ((x) + 16))
+#define USBH_ROOTHUBB_DEVREMOVE(x) (1 << (x))
+
+#define USBH_ROOTSTAT 0xf0
+#define USBH_ROOTSTAT_CLRRMTWUE (1 << 31)
+#define USBH_ROOTSTAT_OVRCURCHG (1 << 17)
+#define USBH_ROOTSTAT_DEVCONWUE (1 << 15)
+#define USBH_ROOTSTAT_OVRCURI (1 << 1)
+#define USBH_ROOTSTAT_LOCPWRS (1 << 0)
+
+#define USBH_PORTSTAT(x) (0xf4 + ((x) * 4))
+#define USBH_PORTSTAT_PRTRSTSC (1 << 20)
+#define USBH_PORTSTAT_OVRCURIC (1 << 19)
+#define USBH_PORTSTAT_PRTSTATSC (1 << 18)
+#define USBH_PORTSTAT_PRTENBLSC (1 << 17)
+#define USBH_PORTSTAT_CONNECTSC (1 << 16)
+#define USBH_PORTSTAT_LSDEVCON (1 << 9)
+#define USBH_PORTSTAT_PRTPWRST (1 << 8)
+#define USBH_PORTSTAT_PRTRSTST (1 << 4)
+#define USBH_PORTSTAT_PRTOVRCURI (1 << 3)
+#define USBH_PORTSTAT_PRTSUSPST (1 << 2)
+#define USBH_PORTSTAT_PRTENABST (1 << 1)
+#define USBH_PORTSTAT_CURCONST (1 << 0)
+
+#define USB_DMAREV 0x800
+#define USB_DMAINTSTAT 0x804
+#define USB_DMAINTSTAT_EPERR (1 << 1)
+#define USB_DMAINTSTAT_ETDERR (1 << 0)
+
+#define USB_DMAINTEN 0x808
+#define USB_DMAINTEN_EPERRINTEN (1 << 1)
+#define USB_DMAINTEN_ETDERRINTEN (1 << 0)
+
+#define USB_ETDDMAERSTAT 0x80c
+#define USB_EPDMAERSTAT 0x810
+#define USB_ETDDMAEN 0x820
+#define USB_EPDMAEN 0x824
+#define USB_ETDDMAXTEN 0x828
+#define USB_EPDMAXTEN 0x82c
+#define USB_ETDDMAENXYT 0x830
+#define USB_EPDMAENXYT 0x834
+#define USB_ETDDMABST4EN 0x838
+#define USB_EPDMABST4EN 0x83c
+
+#define USB_MISCCONTROL 0x840
+#define USB_MISCCONTROL_ISOPREVFRM (1 << 3)
+#define USB_MISCCONTROL_SKPRTRY (1 << 2)
+#define USB_MISCCONTROL_ARBMODE (1 << 1)
+#define USB_MISCCONTROL_FILTCC (1 << 0)
+
+#define USB_ETDDMACHANLCLR 0x848
+#define USB_EPDMACHANLCLR 0x84c
+#define USB_ETDSMSA(x) (0x900 + ((x) * 4))
+#define USB_EPSMSA(x) (0x980 + ((x) * 4))
+#define USB_ETDDMABUFPTR(x) (0xa00 + ((x) * 4))
+#define USB_EPDMABUFPTR(x) (0xa80 + ((x) * 4))
+
+#define USB_ETD_DWORD(x, w) (0x200 + ((x) * 16) + ((w) * 4))
+#define DW0_ADDRESS 0
+#define DW0_ENDPNT 7
+#define DW0_DIRECT 11
+#define DW0_SPEED 13
+#define DW0_FORMAT 14
+#define DW0_MAXPKTSIZ 16
+#define DW0_HALTED 27
+#define DW0_TOGCRY 28
+#define DW0_SNDNAK 30
+
+#define DW1_XBUFSRTAD 0
+#define DW1_YBUFSRTAD 16
+
+#define DW2_RTRYDELAY 0
+#define DW2_POLINTERV 0
+#define DW2_STARTFRM 0
+#define DW2_RELPOLPOS 8
+#define DW2_DIRPID 16
+#define DW2_BUFROUND 18
+#define DW2_DELAYINT 19
+#define DW2_DATATOG 22
+#define DW2_ERRORCNT 24
+#define DW2_COMPCODE 28
+
+#define DW3_TOTBYECNT 0
+#define DW3_PKTLEN0 0
+#define DW3_COMPCODE0 12
+#define DW3_PKTLEN1 16
+#define DW3_BUFSIZE 21
+#define DW3_COMPCODE1 28
+
+#define USBCTRL 0x600
+#define USBCTRL_I2C_WU_INT_STAT (1 << 27)
+#define USBCTRL_OTG_WU_INT_STAT (1 << 26)
+#define USBCTRL_HOST_WU_INT_STAT (1 << 25)
+#define USBCTRL_FNT_WU_INT_STAT (1 << 24)
+#define USBCTRL_I2C_WU_INT_EN (1 << 19)
+#define USBCTRL_OTG_WU_INT_EN (1 << 18)
+#define USBCTRL_HOST_WU_INT_EN (1 << 17)
+#define USBCTRL_FNT_WU_INT_EN (1 << 16)
+#define USBCTRL_OTC_RCV_RXDP (1 << 13)
+#define USBCTRL_HOST1_BYP_TLL (1 << 12)
+#define USBCTRL_OTG_BYP_VAL(x) ((x) << 10)
+#define USBCTRL_HOST1_BYP_VAL(x) ((x) << 8)
+#define USBCTRL_OTG_PWR_MASK (1 << 6)
+#define USBCTRL_HOST1_PWR_MASK (1 << 5)
+#define USBCTRL_HOST2_PWR_MASK (1 << 4)
+#define USBCTRL_USB_BYP (1 << 2)
+#define USBCTRL_HOST1_TXEN_OE (1 << 1)
+
+
+/* Values in TD blocks */
+#define TD_DIR_SETUP 0
+#define TD_DIR_OUT 1
+#define TD_DIR_IN 2
+#define TD_FORMAT_CONTROL 0
+#define TD_FORMAT_ISO 1
+#define TD_FORMAT_BULK 2
+#define TD_FORMAT_INT 3
+#define TD_TOGGLE_CARRY 0
+#define TD_TOGGLE_DATA0 2
+#define TD_TOGGLE_DATA1 3
+
+/* control transfer states */
+#define US_CTRL_SETUP 2
+#define US_CTRL_DATA 1
+#define US_CTRL_ACK 0
+
+/* bulk transfer main state and 0-length packet */
+#define US_BULK 1
+#define US_BULK0 0
+
+/*ETD format description*/
+#define IMX_FMT_CTRL 0x0
+#define IMX_FMT_ISO 0x1
+#define IMX_FMT_BULK 0x2
+#define IMX_FMT_INT 0x3
+
+static char fmt_urb_to_etd[4] = {
+/*PIPE_ISOCHRONOUS*/ IMX_FMT_ISO,
+/*PIPE_INTERRUPT*/ IMX_FMT_INT,
+/*PIPE_CONTROL*/ IMX_FMT_CTRL,
+/*PIPE_BULK*/ IMX_FMT_BULK
+};
+
+/* condition (error) CC codes and mapping (OHCI like) */
+
+#define TD_CC_NOERROR 0x00
+#define TD_CC_CRC 0x01
+#define TD_CC_BITSTUFFING 0x02
+#define TD_CC_DATATOGGLEM 0x03
+#define TD_CC_STALL 0x04
+#define TD_DEVNOTRESP 0x05
+#define TD_PIDCHECKFAIL 0x06
+/*#define TD_UNEXPECTEDPID 0x07 - reserved, not active on MX2*/
+#define TD_DATAOVERRUN 0x08
+#define TD_DATAUNDERRUN 0x09
+#define TD_BUFFEROVERRUN 0x0C
+#define TD_BUFFERUNDERRUN 0x0D
+#define TD_SCHEDULEOVERRUN 0x0E
+#define TD_NOTACCESSED 0x0F
+
+static const int cc_to_error[16] = {
+ /* No Error */ 0,
+ /* CRC Error */ -EILSEQ,
+ /* Bit Stuff */ -EPROTO,
+ /* Data Togg */ -EILSEQ,
+ /* Stall */ -EPIPE,
+ /* DevNotResp */ -ETIMEDOUT,
+ /* PIDCheck */ -EPROTO,
+ /* UnExpPID */ -EPROTO,
+ /* DataOver */ -EOVERFLOW,
+ /* DataUnder */ -EREMOTEIO,
+ /* (for hw) */ -EIO,
+ /* (for hw) */ -EIO,
+ /* BufferOver */ -ECOMM,
+ /* BuffUnder */ -ENOSR,
+ /* (for HCD) */ -ENOSPC,
+ /* (for HCD) */ -EALREADY
+};
+
+/* HCD data associated with a usb core URB */
+struct urb_priv {
+ struct urb *urb;
+ struct usb_host_endpoint *ep;
+ int active;
+ int state;
+ struct td *isoc_td;
+ int isoc_remaining;
+ int isoc_status;
+};
+
+/* HCD data associated with a usb core endpoint */
+struct ep_priv {
+ struct usb_host_endpoint *ep;
+ struct list_head td_list;
+ struct list_head queue;
+ int etd[NUM_ISO_ETDS];
+ int waiting_etd;
+};
+
+/* isoc packet */
+struct td {
+ struct list_head list;
+ struct urb *urb;
+ struct usb_host_endpoint *ep;
+ dma_addr_t data;
+ unsigned long buf_addr;
+ int len;
+ int frame;
+ int isoc_index;
+};
+
+/* HCD data associated with a hardware ETD */
+struct etd_priv {
+ struct usb_host_endpoint *ep;
+ struct urb *urb;
+ struct td *td;
+ struct list_head queue;
+ dma_addr_t dma_handle;
+ int alloc;
+ int len;
+ int dmem_size;
+ int dmem_offset;
+ int active_count;
+#ifdef DEBUG
+ int activated_frame;
+ int disactivated_frame;
+ int last_int_frame;
+ int last_req_frame;
+ u32 submitted_dwords[4];
+#endif
+};
+
+/* Hardware data memory info */
+struct imx21_dmem_area {
+ struct usb_host_endpoint *ep;
+ unsigned int offset;
+ unsigned int size;
+ struct list_head list;
+};
+
+#ifdef DEBUG
+struct debug_usage_stats {
+ unsigned int value;
+ unsigned int maximum;
+};
+
+struct debug_stats {
+ unsigned long submitted;
+ unsigned long completed_ok;
+ unsigned long completed_failed;
+ unsigned long unlinked;
+ unsigned long queue_etd;
+ unsigned long queue_dmem;
+};
+
+struct debug_isoc_trace {
+ int schedule_frame;
+ int submit_frame;
+ int request_len;
+ int done_frame;
+ int done_len;
+ int cc;
+ struct td *td;
+};
+#endif
+
+/* HCD data structure */
+struct imx21 {
+ spinlock_t lock;
+ struct device *dev;
+ struct mx21_usbh_platform_data *pdata;
+ struct list_head dmem_list;
+ struct list_head queue_for_etd; /* eps queued due to etd shortage */
+ struct list_head queue_for_dmem; /* etds queued due to dmem shortage */
+ struct etd_priv etd[USB_NUM_ETD];
+ struct clk *clk;
+ void __iomem *regs;
+#ifdef DEBUG
+ struct dentry *debug_root;
+ struct debug_stats nonisoc_stats;
+ struct debug_stats isoc_stats;
+ struct debug_usage_stats etd_usage;
+ struct debug_usage_stats dmem_usage;
+ struct debug_isoc_trace isoc_trace[20];
+ struct debug_isoc_trace isoc_trace_failed[20];
+ unsigned long debug_unblocks;
+ int isoc_trace_index;
+ int isoc_trace_index_failed;
+#endif
+};
+
+#endif
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