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-rw-r--r--drivers/usb/Kconfig2
-rw-r--r--drivers/usb/atm/ueagle-atm.c38
-rw-r--r--drivers/usb/gadget/Kconfig4
-rw-r--r--drivers/usb/host/ehci-hcd.c19
-rw-r--r--drivers/usb/host/ehci-hub.c78
-rw-r--r--drivers/usb/host/ehci-msm.c20
-rw-r--r--drivers/usb/host/ehci-q.c82
-rw-r--r--drivers/usb/host/ehci-sched.c17
-rw-r--r--drivers/usb/host/ehci-sysfs.c190
-rw-r--r--drivers/usb/host/ehci.h5
-rw-r--r--drivers/usb/host/ohci-sh.c2
-rw-r--r--drivers/usb/host/pci-quirks.c28
-rw-r--r--drivers/usb/host/r8a66597-hcd.c6
-rw-r--r--drivers/usb/host/r8a66597.h38
-rw-r--r--drivers/usb/mon/mon_text.c9
-rw-r--r--drivers/usb/renesas_usbhs/Kconfig15
-rw-r--r--drivers/usb/renesas_usbhs/common.c23
-rw-r--r--drivers/usb/renesas_usbhs/fifo.c41
-rw-r--r--drivers/usb/renesas_usbhs/mod_gadget.c65
-rw-r--r--drivers/usb/serial/pl2303.c26
20 files changed, 473 insertions, 235 deletions
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 8cd999a217b6..48f1781352f1 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -118,6 +118,8 @@ source "drivers/usb/host/Kconfig"
source "drivers/usb/musb/Kconfig"
+source "drivers/usb/renesas_usbhs/Kconfig"
+
source "drivers/usb/class/Kconfig"
source "drivers/usb/storage/Kconfig"
diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c
index e71521ce3010..428f36801e06 100644
--- a/drivers/usb/atm/ueagle-atm.c
+++ b/drivers/usb/atm/ueagle-atm.c
@@ -116,14 +116,14 @@ struct uea_cmvs_v1 {
u32 address;
u16 offset;
u32 data;
-} __attribute__ ((packed));
+} __packed;
struct uea_cmvs_v2 {
u32 group;
u32 address;
u32 offset;
u32 data;
-} __attribute__ ((packed));
+} __packed;
/* information about currently processed cmv */
struct cmv_dsc_e1 {
@@ -352,7 +352,7 @@ struct block_index {
__le32 PageAddress;
__le16 dummy1;
__le16 PageNumber;
-} __attribute__ ((packed));
+} __packed;
#define E4_IS_BOOT_PAGE(PageSize) ((le32_to_cpu(PageSize)) & 0x80000000)
#define E4_PAGE_BYTES(PageSize) ((le32_to_cpu(PageSize) & 0x7fffffff) * 4)
@@ -367,7 +367,7 @@ struct l1_code {
u8 page_number_to_block_index[E4_MAX_PAGE_NUMBER];
struct block_index page_header[E4_NO_SWAPPAGE_HEADERS];
u8 code[0];
-} __attribute__ ((packed));
+} __packed;
/* structures describing a block within a DSP page */
struct block_info_e1 {
@@ -377,7 +377,7 @@ struct block_info_e1 {
__le16 wOvlOffset;
__le16 wOvl; /* overlay */
__le16 wLast;
-} __attribute__ ((packed));
+} __packed;
#define E1_BLOCK_INFO_SIZE 12
struct block_info_e4 {
@@ -387,7 +387,7 @@ struct block_info_e4 {
__be32 dwSize;
__be32 dwAddress;
__be16 wReserved;
-} __attribute__ ((packed));
+} __packed;
#define E4_BLOCK_INFO_SIZE 14
#define UEA_BIHDR 0xabcd
@@ -467,7 +467,7 @@ struct cmv_e1 {
__le32 dwSymbolicAddress;
__le16 wOffsetAddress;
__le32 dwData;
-} __attribute__ ((packed));
+} __packed;
struct cmv_e4 {
__be16 wGroup;
@@ -475,17 +475,17 @@ struct cmv_e4 {
__be16 wOffset;
__be16 wAddress;
__be32 dwData[6];
-} __attribute__ ((packed));
+} __packed;
/* structures representing swap information */
struct swap_info_e1 {
__u8 bSwapPageNo;
__u8 bOvl; /* overlay */
-} __attribute__ ((packed));
+} __packed;
struct swap_info_e4 {
__u8 bSwapPageNo;
-} __attribute__ ((packed));
+} __packed;
/* structures representing interrupt data */
#define e1_bSwapPageNo u.e1.s1.swapinfo.bSwapPageNo
@@ -499,23 +499,23 @@ union intr_data_e1 {
struct {
struct swap_info_e1 swapinfo;
__le16 wDataSize;
- } __attribute__ ((packed)) s1;
+ } __packed s1;
struct {
struct cmv_e1 cmv;
__le16 wDataSize;
- } __attribute__ ((packed)) s2;
-} __attribute__ ((packed));
+ } __packed s2;
+} __packed;
union intr_data_e4 {
struct {
struct swap_info_e4 swapinfo;
__le16 wDataSize;
- } __attribute__ ((packed)) s1;
+ } __packed s1;
struct {
struct cmv_e4 cmv;
__le16 wDataSize;
- } __attribute__ ((packed)) s2;
-} __attribute__ ((packed));
+ } __packed s2;
+} __packed;
struct intr_pkt {
__u8 bType;
@@ -528,15 +528,15 @@ struct intr_pkt {
union intr_data_e1 e1;
union intr_data_e4 e4;
} u;
-} __attribute__ ((packed));
+} __packed;
#define E1_INTR_PKT_SIZE 28
#define E4_INTR_PKT_SIZE 64
static struct usb_driver uea_driver;
static DEFINE_MUTEX(uea_mutex);
-static const char *chip_name[] = {"ADI930", "Eagle I", "Eagle II", "Eagle III",
- "Eagle IV"};
+static const char * const chip_name[] = {
+ "ADI930", "Eagle I", "Eagle II", "Eagle III", "Eagle IV"};
static int modem_index;
static unsigned int debug;
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index b0594d907549..44b6b40aafb4 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -216,9 +216,11 @@ config USB_R8A66597
dynamically linked module called "r8a66597_udc" and force all
gadget drivers to also be dynamically linked.
-config USB_RENESAS_USBHS
+config USB_RENESAS_USBHS_UDC
tristate 'Renesas USBHS controller'
depends on SUPERH || ARCH_SHMOBILE
+ depends on USB_RENESAS_USBHS
+ select USB_GADGET_DUALSPEED
help
Renesas USBHS is a discrete USB host and peripheral controller chip
that supports both full and high speed USB 2.0 data transfers.
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index e18862c5b059..2902199fa8ff 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -90,7 +90,8 @@ static const char hcd_name [] = "ehci_hcd";
#define EHCI_IAA_MSECS 10 /* arbitrary */
#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */
#define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */
-#define EHCI_SHRINK_FRAMES 5 /* async qh unlink delay */
+#define EHCI_SHRINK_JIFFIES (DIV_ROUND_UP(HZ, 200) + 1)
+ /* 200-ms async qh unlink delay */
/* Initial IRQ latency: faster than hw default */
static int log2_irq_thresh = 0; // 0 to 6
@@ -148,10 +149,7 @@ timer_action(struct ehci_hcd *ehci, enum ehci_timer_action action)
break;
/* case TIMER_ASYNC_SHRINK: */
default:
- /* add a jiffie since we synch against the
- * 8 KHz uframe counter.
- */
- t = DIV_ROUND_UP(EHCI_SHRINK_FRAMES * HZ, 1000) + 1;
+ t = EHCI_SHRINK_JIFFIES;
break;
}
mod_timer(&ehci->watchdog, t + jiffies);
@@ -336,6 +334,7 @@ static void ehci_work(struct ehci_hcd *ehci);
#include "ehci-mem.c"
#include "ehci-q.c"
#include "ehci-sched.c"
+#include "ehci-sysfs.c"
/*-------------------------------------------------------------------------*/
@@ -520,7 +519,7 @@ static void ehci_stop (struct usb_hcd *hcd)
ehci_reset (ehci);
spin_unlock_irq(&ehci->lock);
- remove_companion_file(ehci);
+ remove_sysfs_files(ehci);
remove_debug_files (ehci);
/* root hub is shut down separately (first, when possible) */
@@ -571,6 +570,12 @@ static int ehci_init(struct usb_hcd *hcd)
hcc_params = ehci_readl(ehci, &ehci->caps->hcc_params);
/*
+ * by default set standard 80% (== 100 usec/uframe) max periodic
+ * bandwidth as required by USB 2.0
+ */
+ ehci->uframe_periodic_max = 100;
+
+ /*
* hw default: 1K periodic list heads, one per frame.
* periodic_size can shrink by USBCMD update if hcc_params allows.
*/
@@ -754,7 +759,7 @@ static int ehci_run (struct usb_hcd *hcd)
* since the class device isn't created that early.
*/
create_debug_files(ehci);
- create_companion_file(ehci);
+ create_sysfs_files(ehci);
return 0;
}
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index ea6184bf48d0..bf2c8f65e1ae 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -471,29 +471,6 @@ static int ehci_bus_resume (struct usb_hcd *hcd)
/*-------------------------------------------------------------------------*/
-/* Display the ports dedicated to the companion controller */
-static ssize_t show_companion(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct ehci_hcd *ehci;
- int nports, index, n;
- int count = PAGE_SIZE;
- char *ptr = buf;
-
- ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
- nports = HCS_N_PORTS(ehci->hcs_params);
-
- for (index = 0; index < nports; ++index) {
- if (test_bit(index, &ehci->companion_ports)) {
- n = scnprintf(ptr, count, "%d\n", index + 1);
- ptr += n;
- count -= n;
- }
- }
- return ptr - buf;
-}
-
/*
* Sets the owner of a port
*/
@@ -528,58 +505,6 @@ static void set_owner(struct ehci_hcd *ehci, int portnum, int new_owner)
}
}
-/*
- * Dedicate or undedicate a port to the companion controller.
- * Syntax is "[-]portnum", where a leading '-' sign means
- * return control of the port to the EHCI controller.
- */
-static ssize_t store_companion(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct ehci_hcd *ehci;
- int portnum, new_owner;
-
- ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
- new_owner = PORT_OWNER; /* Owned by companion */
- if (sscanf(buf, "%d", &portnum) != 1)
- return -EINVAL;
- if (portnum < 0) {
- portnum = - portnum;
- new_owner = 0; /* Owned by EHCI */
- }
- if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
- return -ENOENT;
- portnum--;
- if (new_owner)
- set_bit(portnum, &ehci->companion_ports);
- else
- clear_bit(portnum, &ehci->companion_ports);
- set_owner(ehci, portnum, new_owner);
- return count;
-}
-static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
-
-static inline int create_companion_file(struct ehci_hcd *ehci)
-{
- int i = 0;
-
- /* with integrated TT there is no companion! */
- if (!ehci_is_TDI(ehci))
- i = device_create_file(ehci_to_hcd(ehci)->self.controller,
- &dev_attr_companion);
- return i;
-}
-
-static inline void remove_companion_file(struct ehci_hcd *ehci)
-{
- /* with integrated TT there is no companion! */
- if (!ehci_is_TDI(ehci))
- device_remove_file(ehci_to_hcd(ehci)->self.controller,
- &dev_attr_companion);
-}
-
-
/*-------------------------------------------------------------------------*/
static int check_reset_complete (
@@ -891,10 +816,11 @@ static int ehci_hub_control (
* power switching; they're allowed to just limit the
* current. khubd will turn the power back on.
*/
- if (HCS_PPC (ehci->hcs_params)){
+ if ((temp & PORT_OC) && HCS_PPC(ehci->hcs_params)) {
ehci_writel(ehci,
temp & ~(PORT_RWC_BITS | PORT_POWER),
status_reg);
+ temp = ehci_readl(ehci, status_reg);
}
}
diff --git a/drivers/usb/host/ehci-msm.c b/drivers/usb/host/ehci-msm.c
index b5a0bf649c95..592d5f76803e 100644
--- a/drivers/usb/host/ehci-msm.c
+++ b/drivers/usb/host/ehci-msm.c
@@ -40,27 +40,9 @@ static int ehci_msm_reset(struct usb_hcd *hcd)
int retval;
ehci->caps = USB_CAPLENGTH;
- ehci->regs = USB_CAPLENGTH +
- HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
- dbg_hcs_params(ehci, "reset");
- dbg_hcc_params(ehci, "reset");
-
- /* cache the data to minimize the chip reads*/
- ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
-
hcd->has_tt = 1;
- ehci->sbrn = HCD_USB2;
-
- retval = ehci_halt(ehci);
- if (retval)
- return retval;
-
- /* data structure init */
- retval = ehci_init(hcd);
- if (retval)
- return retval;
- retval = ehci_reset(ehci);
+ retval = ehci_setup(hcd);
if (retval)
return retval;
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 5d6bc624c961..9bf3c0d983c4 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -1231,6 +1231,8 @@ static void start_unlink_async (struct ehci_hcd *ehci, struct ehci_qh *qh)
prev->hw->hw_next = qh->hw->hw_next;
prev->qh_next = qh->qh_next;
+ if (ehci->qh_scan_next == qh)
+ ehci->qh_scan_next = qh->qh_next.qh;
wmb ();
/* If the controller isn't running, we don't have to wait for it */
@@ -1256,53 +1258,49 @@ static void scan_async (struct ehci_hcd *ehci)
struct ehci_qh *qh;
enum ehci_timer_action action = TIMER_IO_WATCHDOG;
- ehci->stamp = ehci_readl(ehci, &ehci->regs->frame_index);
timer_action_done (ehci, TIMER_ASYNC_SHRINK);
-rescan:
stopped = !HC_IS_RUNNING(ehci_to_hcd(ehci)->state);
- qh = ehci->async->qh_next.qh;
- if (likely (qh != NULL)) {
- do {
- /* clean any finished work for this qh */
- if (!list_empty(&qh->qtd_list) && (stopped ||
- qh->stamp != ehci->stamp)) {
- int temp;
-
- /* unlinks could happen here; completion
- * reporting drops the lock. rescan using
- * the latest schedule, but don't rescan
- * qhs we already finished (no looping)
- * unless the controller is stopped.
- */
- qh = qh_get (qh);
- qh->stamp = ehci->stamp;
- temp = qh_completions (ehci, qh);
- if (qh->needs_rescan)
- unlink_async(ehci, qh);
- qh_put (qh);
- if (temp != 0) {
- goto rescan;
- }
- }
- /* unlink idle entries, reducing DMA usage as well
- * as HCD schedule-scanning costs. delay for any qh
- * we just scanned, there's a not-unusual case that it
- * doesn't stay idle for long.
- * (plus, avoids some kind of re-activation race.)
+ ehci->qh_scan_next = ehci->async->qh_next.qh;
+ while (ehci->qh_scan_next) {
+ qh = ehci->qh_scan_next;
+ ehci->qh_scan_next = qh->qh_next.qh;
+ rescan:
+ /* clean any finished work for this qh */
+ if (!list_empty(&qh->qtd_list)) {
+ int temp;
+
+ /*
+ * Unlinks could happen here; completion reporting
+ * drops the lock. That's why ehci->qh_scan_next
+ * always holds the next qh to scan; if the next qh
+ * gets unlinked then ehci->qh_scan_next is adjusted
+ * in start_unlink_async().
*/
- if (list_empty(&qh->qtd_list)
- && qh->qh_state == QH_STATE_LINKED) {
- if (!ehci->reclaim && (stopped ||
- ((ehci->stamp - qh->stamp) & 0x1fff)
- >= EHCI_SHRINK_FRAMES * 8))
- start_unlink_async(ehci, qh);
- else
- action = TIMER_ASYNC_SHRINK;
- }
+ qh = qh_get(qh);
+ temp = qh_completions(ehci, qh);
+ if (qh->needs_rescan)
+ unlink_async(ehci, qh);
+ qh->unlink_time = jiffies + EHCI_SHRINK_JIFFIES;
+ qh_put(qh);
+ if (temp != 0)
+ goto rescan;
+ }
- qh = qh->qh_next.qh;
- } while (qh);
+ /* unlink idle entries, reducing DMA usage as well
+ * as HCD schedule-scanning costs. delay for any qh
+ * we just scanned, there's a not-unusual case that it
+ * doesn't stay idle for long.
+ * (plus, avoids some kind of re-activation race.)
+ */
+ if (list_empty(&qh->qtd_list)
+ && qh->qh_state == QH_STATE_LINKED) {
+ if (!ehci->reclaim && (stopped ||
+ time_after_eq(jiffies, qh->unlink_time)))
+ start_unlink_async(ehci, qh);
+ else
+ action = TIMER_ASYNC_SHRINK;
+ }
}
if (action == TIMER_ASYNC_SHRINK)
timer_action (ehci, TIMER_ASYNC_SHRINK);
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index 6c9fbe352f73..2abf8543f083 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -172,7 +172,7 @@ periodic_usecs (struct ehci_hcd *ehci, unsigned frame, unsigned uframe)
}
}
#ifdef DEBUG
- if (usecs > 100)
+ if (usecs > ehci->uframe_periodic_max)
ehci_err (ehci, "uframe %d sched overrun: %d usecs\n",
frame * 8 + uframe, usecs);
#endif
@@ -709,11 +709,8 @@ static int check_period (
if (uframe >= 8)
return 0;
- /*
- * 80% periodic == 100 usec/uframe available
- * convert "usecs we need" to "max already claimed"
- */
- usecs = 100 - usecs;
+ /* convert "usecs we need" to "max already claimed" */
+ usecs = ehci->uframe_periodic_max - usecs;
/* we "know" 2 and 4 uframe intervals were rejected; so
* for period 0, check _every_ microframe in the schedule.
@@ -1286,9 +1283,9 @@ itd_slot_ok (
{
uframe %= period;
do {
- /* can't commit more than 80% periodic == 100 usec */
+ /* can't commit more than uframe_periodic_max usec */
if (periodic_usecs (ehci, uframe >> 3, uframe & 0x7)
- > (100 - usecs))
+ > (ehci->uframe_periodic_max - usecs))
return 0;
/* we know urb->interval is 2^N uframes */
@@ -1345,7 +1342,7 @@ sitd_slot_ok (
#endif
/* check starts (OUT uses more than one) */
- max_used = 100 - stream->usecs;
+ max_used = ehci->uframe_periodic_max - stream->usecs;
for (tmp = stream->raw_mask & 0xff; tmp; tmp >>= 1, uf++) {
if (periodic_usecs (ehci, frame, uf) > max_used)
return 0;
@@ -1354,7 +1351,7 @@ sitd_slot_ok (
/* for IN, check CSPLIT */
if (stream->c_usecs) {
uf = uframe & 7;
- max_used = 100 - stream->c_usecs;
+ max_used = ehci->uframe_periodic_max - stream->c_usecs;
do {
tmp = 1 << uf;
tmp <<= 8;
diff --git a/drivers/usb/host/ehci-sysfs.c b/drivers/usb/host/ehci-sysfs.c
new file mode 100644
index 000000000000..14ced00ba220
--- /dev/null
+++ b/drivers/usb/host/ehci-sysfs.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2007 by Alan Stern
+ *
+ * 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 ehci-hcd.c */
+
+
+/* Display the ports dedicated to the companion controller */
+static ssize_t show_companion(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ehci_hcd *ehci;
+ int nports, index, n;
+ int count = PAGE_SIZE;
+ char *ptr = buf;
+
+ ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
+ nports = HCS_N_PORTS(ehci->hcs_params);
+
+ for (index = 0; index < nports; ++index) {
+ if (test_bit(index, &ehci->companion_ports)) {
+ n = scnprintf(ptr, count, "%d\n", index + 1);
+ ptr += n;
+ count -= n;
+ }
+ }
+ return ptr - buf;
+}
+
+/*
+ * Dedicate or undedicate a port to the companion controller.
+ * Syntax is "[-]portnum", where a leading '-' sign means
+ * return control of the port to the EHCI controller.
+ */
+static ssize_t store_companion(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ehci_hcd *ehci;
+ int portnum, new_owner;
+
+ ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
+ new_owner = PORT_OWNER; /* Owned by companion */
+ if (sscanf(buf, "%d", &portnum) != 1)
+ return -EINVAL;
+ if (portnum < 0) {
+ portnum = - portnum;
+ new_owner = 0; /* Owned by EHCI */
+ }
+ if (portnum <= 0 || portnum > HCS_N_PORTS(ehci->hcs_params))
+ return -ENOENT;
+ portnum--;
+ if (new_owner)
+ set_bit(portnum, &ehci->companion_ports);
+ else
+ clear_bit(portnum, &ehci->companion_ports);
+ set_owner(ehci, portnum, new_owner);
+ return count;
+}
+static DEVICE_ATTR(companion, 0644, show_companion, store_companion);
+
+
+/*
+ * Display / Set uframe_periodic_max
+ */
+static ssize_t show_uframe_periodic_max(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct ehci_hcd *ehci;
+ int n;
+
+ ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
+ n = scnprintf(buf, PAGE_SIZE, "%d\n", ehci->uframe_periodic_max);
+ return n;
+}
+
+
+static ssize_t store_uframe_periodic_max(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ehci_hcd *ehci;
+ unsigned uframe_periodic_max;
+ unsigned frame, uframe;
+ unsigned short allocated_max;
+ unsigned long flags;
+ ssize_t ret;
+
+ ehci = hcd_to_ehci(bus_to_hcd(dev_get_drvdata(dev)));
+ if (kstrtouint(buf, 0, &uframe_periodic_max) < 0)
+ return -EINVAL;
+
+ if (uframe_periodic_max < 100 || uframe_periodic_max >= 125) {
+ ehci_info(ehci, "rejecting invalid request for "
+ "uframe_periodic_max=%u\n", uframe_periodic_max);
+ return -EINVAL;
+ }
+
+ ret = -EINVAL;
+
+ /*
+ * lock, so that our checking does not race with possible periodic
+ * bandwidth allocation through submitting new urbs.
+ */
+ spin_lock_irqsave (&ehci->lock, flags);
+
+ /*
+ * for request to decrease max periodic bandwidth, we have to check
+ * every microframe in the schedule to see whether the decrease is
+ * possible.
+ */
+ if (uframe_periodic_max < ehci->uframe_periodic_max) {
+ allocated_max = 0;
+
+ for (frame = 0; frame < ehci->periodic_size; ++frame)
+ for (uframe = 0; uframe < 7; ++uframe)
+ allocated_max = max(allocated_max,
+ periodic_usecs (ehci, frame, uframe));
+
+ if (allocated_max > uframe_periodic_max) {
+ ehci_info(ehci,
+ "cannot decrease uframe_periodic_max becase "
+ "periodic bandwidth is already allocated "
+ "(%u > %u)\n",
+ allocated_max, uframe_periodic_max);
+ goto out_unlock;
+ }
+ }
+
+ /* increasing is always ok */
+
+ ehci_info(ehci, "setting max periodic bandwidth to %u%% "
+ "(== %u usec/uframe)\n",
+ 100*uframe_periodic_max/125, uframe_periodic_max);
+
+ if (uframe_periodic_max != 100)
+ ehci_warn(ehci, "max periodic bandwidth set is non-standard\n");
+
+ ehci->uframe_periodic_max = uframe_periodic_max;
+ ret = count;
+
+out_unlock:
+ spin_unlock_irqrestore (&ehci->lock, flags);
+ return ret;
+}
+static DEVICE_ATTR(uframe_periodic_max, 0644, show_uframe_periodic_max, store_uframe_periodic_max);
+
+
+static inline int create_sysfs_files(struct ehci_hcd *ehci)
+{
+ struct device *controller = ehci_to_hcd(ehci)->self.controller;
+ int i = 0;
+
+ /* with integrated TT there is no companion! */
+ if (!ehci_is_TDI(ehci))
+ i = device_create_file(controller, &dev_attr_companion);
+ if (i)
+ goto out;
+
+ i = device_create_file(controller, &dev_attr_uframe_periodic_max);
+out:
+ return i;
+}
+
+static inline void remove_sysfs_files(struct ehci_hcd *ehci)
+{
+ struct device *controller = ehci_to_hcd(ehci)->self.controller;
+
+ /* with integrated TT there is no companion! */
+ if (!ehci_is_TDI(ehci))
+ device_remove_file(controller, &dev_attr_companion);
+
+ device_remove_file(controller, &dev_attr_uframe_periodic_max);
+}
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index bd6ff489baf9..e4feec3457fb 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -75,6 +75,7 @@ struct ehci_hcd { /* one per controller */
struct ehci_qh *async;
struct ehci_qh *dummy; /* For AMD quirk use */
struct ehci_qh *reclaim;
+ struct ehci_qh *qh_scan_next;
unsigned scanning : 1;
/* periodic schedule support */
@@ -87,6 +88,8 @@ struct ehci_hcd { /* one per controller */
union ehci_shadow *pshadow; /* mirror hw periodic table */
int next_uframe; /* scan periodic, start here */
unsigned periodic_sched; /* periodic activity count */
+ unsigned uframe_periodic_max; /* max periodic time per uframe */
+
/* list of itds & sitds completed while clock_frame was still active */
struct list_head cached_itd_list;
@@ -117,7 +120,6 @@ struct ehci_hcd { /* one per controller */
struct timer_list iaa_watchdog;
struct timer_list watchdog;
unsigned long actions;
- unsigned stamp;
unsigned periodic_stamp;
unsigned random_frame;
unsigned long next_statechange;
@@ -343,6 +345,7 @@ struct ehci_qh {
struct ehci_qh *reclaim; /* next to reclaim */
struct ehci_hcd *ehci;
+ unsigned long unlink_time;
/*
* Do NOT use atomic operations for QH refcounting. On some CPUs
diff --git a/drivers/usb/host/ohci-sh.c b/drivers/usb/host/ohci-sh.c
index f47867ff78c7..14cecb52a9fe 100644
--- a/drivers/usb/host/ohci-sh.c
+++ b/drivers/usb/host/ohci-sh.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2008 Renesas Solutions Corp.
*
- * Author : Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+ * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.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
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index fd930618c28f..b5a7304fcbef 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -507,20 +507,34 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev)
iounmap(base);
}
+static const struct dmi_system_id __initconst ehci_dmi_nohandoff_table[] = {
+ {
+ /* Pegatron Lucid (ExoPC) */
+ .matches = {
+ DMI_MATCH(DMI_BOARD_NAME, "EXOPG06411"),
+ DMI_MATCH(DMI_BIOS_VERSION, "Lucid-CE-133"),
+ },
+ },
+ {
+ /* Pegatron Lucid (Ordissimo AIRIS) */
+ .matches = {
+ DMI_MATCH(DMI_BOARD_NAME, "M11JB"),
+ DMI_MATCH(DMI_BIOS_VERSION, "Lucid-GE-133"),
+ },
+ },
+ { }
+};
+
static void __devinit ehci_bios_handoff(struct pci_dev *pdev,
void __iomem *op_reg_base,
u32 cap, u8 offset)
{
int try_handoff = 1, tried_handoff = 0;
- /* The Pegatron Lucid (ExoPC) tablet sporadically waits for 90
- * seconds trying the handoff on its unused controller. Skip
- * it. */
+ /* The Pegatron Lucid tablet sporadically waits for 98 seconds trying
+ * the handoff on its unused controller. Skip it. */
if (pdev->vendor == 0x8086 && pdev->device == 0x283a) {
- const char *dmi_bn = dmi_get_system_info(DMI_BOARD_NAME);
- const char *dmi_bv = dmi_get_system_info(DMI_BIOS_VERSION);
- if (dmi_bn && !strcmp(dmi_bn, "EXOPG06411") &&
- dmi_bv && !strcmp(dmi_bv, "Lucid-CE-133"))
+ if (dmi_check_system(ehci_dmi_nohandoff_table))
try_handoff = 0;
}
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index db6f8b9c19b6..fd35901861c3 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -6,7 +6,7 @@
* Portions Copyright (C) 2004-2005 David Brownell
* Portions Copyright (C) 1999 Roman Weissgaerber
*
- * Author : Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
+ * Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.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
@@ -1438,7 +1438,7 @@ static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
if (pipenum > 0)
r8a66597_write(r8a66597, ~(1 << pipenum), BEMPSTS);
if (urb->transfer_buffer) {
- r8a66597_write_fifo(r8a66597, td->pipe->fifoaddr, buf, size);
+ r8a66597_write_fifo(r8a66597, td->pipe, buf, size);
if (!usb_pipebulk(urb->pipe) || td->maxpacket != size)
r8a66597_write(r8a66597, BVAL, td->pipe->fifoctr);
}
@@ -2306,7 +2306,7 @@ static int r8a66597_bus_resume(struct usb_hcd *hcd)
dbg("resume port = %d", port);
rh->port &= ~USB_PORT_STAT_SUSPEND;
- rh->port |= USB_PORT_STAT_C_SUSPEND < 16;
+ rh->port |= USB_PORT_STAT_C_SUSPEND << 16;
r8a66597_mdfy(r8a66597, RESUME, RESUME | UACT, dvstctr_reg);
msleep(50);
r8a66597_mdfy(r8a66597, UACT, RESUME | UACT, dvstctr_reg);
diff --git a/drivers/usb/host/r8a66597.h b/drivers/usb/host/r8a66597.h
index 25563e9a90bc..f28782d20eef 100644
--- a/drivers/usb/host/r8a66597.h
+++ b/drivers/usb/host/r8a66597.h
@@ -201,11 +201,26 @@ static inline void r8a66597_write(struct r8a66597 *r8a66597, u16 val,
iowrite16(val, r8a66597->reg + offset);
}
+static inline void r8a66597_mdfy(struct r8a66597 *r8a66597,
+ u16 val, u16 pat, unsigned long offset)
+{
+ u16 tmp;
+ tmp = r8a66597_read(r8a66597, offset);
+ tmp = tmp & (~pat);
+ tmp = tmp | val;
+ r8a66597_write(r8a66597, tmp, offset);
+}
+
+#define r8a66597_bclr(r8a66597, val, offset) \
+ r8a66597_mdfy(r8a66597, 0, val, offset)
+#define r8a66597_bset(r8a66597, val, offset) \
+ r8a66597_mdfy(r8a66597, val, 0, offset)
+
static inline void r8a66597_write_fifo(struct r8a66597 *r8a66597,
- unsigned long offset, u16 *buf,
+ struct r8a66597_pipe *pipe, u16 *buf,
int len)
{
- void __iomem *fifoaddr = r8a66597->reg + offset;
+ void __iomem *fifoaddr = r8a66597->reg + pipe->fifoaddr;
unsigned long count;
unsigned char *pb;
int i;
@@ -230,26 +245,15 @@ static inline void r8a66597_write_fifo(struct r8a66597 *r8a66597,
iowrite16_rep(fifoaddr, buf, len);
if (unlikely(odd)) {
buf = &buf[len];
+ if (r8a66597->pdata->wr0_shorted_to_wr1)
+ r8a66597_bclr(r8a66597, MBW_16, pipe->fifosel);
iowrite8((unsigned char)*buf, fifoaddr);
+ if (r8a66597->pdata->wr0_shorted_to_wr1)
+ r8a66597_bset(r8a66597, MBW_16, pipe->fifosel);
}
}
}
-static inline void r8a66597_mdfy(struct r8a66597 *r8a66597,
- u16 val, u16 pat, unsigned long offset)
-{
- u16 tmp;
- tmp = r8a66597_read(r8a66597, offset);
- tmp = tmp & (~pat);
- tmp = tmp | val;
- r8a66597_write(r8a66597, tmp, offset);
-}
-
-#define r8a66597_bclr(r8a66597, val, offset) \
- r8a66597_mdfy(r8a66597, 0, val, offset)
-#define r8a66597_bset(r8a66597, val, offset) \
- r8a66597_mdfy(r8a66597, val, 0, offset)
-
static inline unsigned long get_syscfg_reg(int port)
{
return port == 0 ? SYSCFG0 : SYSCFG1;
diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c
index c302e1983c70..1c3afcc11bd9 100644
--- a/drivers/usb/mon/mon_text.c
+++ b/drivers/usb/mon/mon_text.c
@@ -670,6 +670,9 @@ int mon_text_add(struct mon_bus *mbus, const struct usb_bus *ubus)
int busnum = ubus? ubus->busnum: 0;
int rc;
+ if (mon_dir == NULL)
+ return 0;
+
if (ubus != NULL) {
rc = snprintf(name, NAMESZ, "%dt", busnum);
if (rc <= 0 || rc >= NAMESZ)
@@ -740,12 +743,12 @@ int __init mon_text_init(void)
mondir = debugfs_create_dir("usbmon", usb_debug_root);
if (IS_ERR(mondir)) {
- printk(KERN_NOTICE TAG ": debugfs is not available\n");
- return -ENODEV;
+ /* debugfs not available, but we can use usbmon without it */
+ return 0;
}
if (mondir == NULL) {
printk(KERN_NOTICE TAG ": unable to create usbmon directory\n");
- return -ENODEV;
+ return -ENOMEM;
}
mon_dir = mondir;
return 0;
diff --git a/drivers/usb/renesas_usbhs/Kconfig b/drivers/usb/renesas_usbhs/Kconfig
new file mode 100644
index 000000000000..286cbf1ca7de
--- /dev/null
+++ b/drivers/usb/renesas_usbhs/Kconfig
@@ -0,0 +1,15 @@
+#
+# Renesas USBHS Controller Drivers
+#
+
+config USB_RENESAS_USBHS
+ tristate 'Renesas USBHS controller'
+ depends on SUPERH || ARCH_SHMOBILE
+ default n
+ help
+ Renesas USBHS is a discrete USB host and peripheral controller chip
+ that supports both full and high speed USB 2.0 data transfers.
+ It has nine or more configurable endpoints, and endpoint zero.
+
+ Say "y" to link the driver statically, or "m" to build a
+ dynamically linked module called "renesas_usbhs"
diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index 665259aec871..d8239e5efa66 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -21,6 +21,29 @@
#include <linux/sysfs.h>
#include "./common.h"
+/*
+ * image of renesas_usbhs
+ *
+ * ex) gadget case
+
+ * mod.c
+ * mod_gadget.c
+ * mod_host.c pipe.c fifo.c
+ *
+ * +-------+ +-----------+
+ * | pipe0 |------>| fifo pio |
+ * +------------+ +-------+ +-----------+
+ * | mod_gadget |=====> | pipe1 |--+
+ * +------------+ +-------+ | +-----------+
+ * | pipe2 | | +-| fifo dma0 |
+ * +------------+ +-------+ | | +-----------+
+ * | mod_host | | pipe3 |<-|--+
+ * +------------+ +-------+ | +-----------+
+ * | .... | +--->| fifo dma1 |
+ * | .... | +-----------+
+ */
+
+
#define USBHSF_RUNTIME_PWCTRL (1 << 0)
/* status */
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 021695de1e9e..406893e4422b 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -26,7 +26,16 @@
#define usbhsf_fifo_is_busy(f) ((f)->pipe) /* see usbhs_pipe_select_fifo */
/*
- * packet info function
+ * packet initialize
+ */
+void usbhs_pkt_init(struct usbhs_pkt *pkt)
+{
+ pkt->dma = DMA_ADDR_INVALID;
+ INIT_LIST_HEAD(&pkt->node);
+}
+
+/*
+ * packet control function
*/
static int usbhsf_null_handle(struct usbhs_pkt *pkt, int *is_done)
{
@@ -43,12 +52,6 @@ static struct usbhs_pkt_handle usbhsf_null_handler = {
.try_run = usbhsf_null_handle,
};
-void usbhs_pkt_init(struct usbhs_pkt *pkt)
-{
- pkt->dma = DMA_ADDR_INVALID;
- INIT_LIST_HEAD(&pkt->node);
-}
-
void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
struct usbhs_pkt_handle *handler,
void *buf, int len, int zero)
@@ -293,7 +296,7 @@ static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
}
/*
- * PIO fifo functions
+ * PIO push handler
*/
static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
{
@@ -313,8 +316,11 @@ static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
return 0;
ret = usbhs_pipe_is_accessible(pipe);
- if (ret < 0)
+ if (ret < 0) {
+ /* inaccessible pipe is not an error */
+ ret = 0;
goto usbhs_fifo_write_busy;
+ }
ret = usbhsf_fifo_barrier(priv, fifo);
if (ret < 0)
@@ -395,6 +401,9 @@ struct usbhs_pkt_handle usbhs_fifo_pio_push_handler = {
.try_run = usbhsf_pio_try_push,
};
+/*
+ * PIO pop handler
+ */
static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
@@ -497,7 +506,7 @@ struct usbhs_pkt_handle usbhs_fifo_pio_pop_handler = {
};
/*
- * handler function
+ * DCP ctrol statge handler
*/
static int usbhsf_ctrl_stage_end(struct usbhs_pkt *pkt, int *is_done)
{
@@ -614,6 +623,9 @@ static void usbhsf_dma_prepare_tasklet(unsigned long data)
dma_async_issue_pending(chan);
}
+/*
+ * DMA push handler
+ */
static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
@@ -633,6 +645,9 @@ static int usbhsf_dma_prepare_push(struct usbhs_pkt *pkt, int *is_done)
if (len % 4) /* 32bit alignment */
goto usbhsf_pio_prepare_push;
+ if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
+ goto usbhsf_pio_prepare_push;
+
/* get enable DMA fifo */
fifo = usbhsf_get_dma_fifo(priv, pkt);
if (!fifo)
@@ -686,6 +701,9 @@ struct usbhs_pkt_handle usbhs_fifo_dma_push_handler = {
.dma_done = usbhsf_dma_push_done,
};
+/*
+ * DMA pop handler
+ */
static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
{
struct usbhs_pipe *pipe = pkt->pipe;
@@ -704,6 +722,9 @@ static int usbhsf_dma_try_pop(struct usbhs_pkt *pkt, int *is_done)
if (!fifo)
goto usbhsf_pio_prepare_pop;
+ if (((u32)pkt->buf + pkt->actual) & 0x7) /* 8byte alignment */
+ goto usbhsf_pio_prepare_pop;
+
ret = usbhsf_fifo_select(pipe, fifo, 0);
if (ret < 0)
goto usbhsf_pio_prepare_pop;
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index 9a8e2e9141b2..ba79dbf5adbc 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -44,6 +44,7 @@ struct usbhsg_uep {
struct usbhsg_gpriv {
struct usb_gadget gadget;
struct usbhs_mod mod;
+ struct list_head link;
struct usbhsg_uep *uep;
int uep_size;
@@ -113,8 +114,18 @@ struct usbhsg_recip_handle {
#define usbhsg_status_clr(gp, b) (gp->status &= ~b)
#define usbhsg_status_has(gp, b) (gp->status & b)
+/* controller */
+LIST_HEAD(the_controller_link);
+
+#define usbhsg_for_each_controller(gpriv)\
+ list_for_each_entry(gpriv, &the_controller_link, link)
+#define usbhsg_controller_register(gpriv)\
+ list_add_tail(&(gpriv)->link, &the_controller_link)
+#define usbhsg_controller_unregister(gpriv)\
+ list_del_init(&(gpriv)->link)
+
/*
- * list push/pop
+ * queue push/pop
*/
static void usbhsg_queue_push(struct usbhsg_uep *uep,
struct usbhsg_request *ureq)
@@ -160,6 +171,9 @@ static void usbhsg_queue_done(struct usbhs_pkt *pkt)
usbhsg_queue_pop(uep, ureq, 0);
}
+/*
+ * dma map/unmap
+ */
static int usbhsg_dma_map(struct device *dev,
struct usbhs_pkt *pkt,
enum dma_data_direction dir)
@@ -473,6 +487,11 @@ static int usbhsg_ep_enable(struct usb_ep *ep,
uep->pipe = pipe;
pipe->mod_private = uep;
+ /*
+ * usbhs_fifo_dma_push/pop_handler try to
+ * use dmaengine if possible.
+ * It will use pio handler if impossible.
+ */
if (usb_endpoint_dir_in(desc))
uep->handler = &usbhs_fifo_dma_push_handler;
else
@@ -724,11 +743,10 @@ static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
* linux usb function
*
*/
-struct usbhsg_gpriv *the_controller;
static int usbhsg_gadget_start(struct usb_gadget_driver *driver,
int (*bind)(struct usb_gadget *))
{
- struct usbhsg_gpriv *gpriv = the_controller;
+ struct usbhsg_gpriv *gpriv;
struct usbhs_priv *priv;
struct device *dev;
int ret;
@@ -738,10 +756,17 @@ static int usbhsg_gadget_start(struct usb_gadget_driver *driver,
!driver->setup ||
driver->speed != USB_SPEED_HIGH)
return -EINVAL;
- if (!gpriv)
- return -ENODEV;
- if (gpriv->driver)
- return -EBUSY;
+
+ /*
+ * find unused controller
+ */
+ usbhsg_for_each_controller(gpriv) {
+ if (!gpriv->driver)
+ goto find_unused_controller;
+ }
+ return -ENODEV;
+
+find_unused_controller:
dev = usbhsg_gpriv_to_dev(gpriv);
priv = usbhsg_gpriv_to_priv(gpriv);
@@ -778,18 +803,25 @@ add_fail:
static int usbhsg_gadget_stop(struct usb_gadget_driver *driver)
{
- struct usbhsg_gpriv *gpriv = the_controller;
+ struct usbhsg_gpriv *gpriv;
struct usbhs_priv *priv;
- struct device *dev = usbhsg_gpriv_to_dev(gpriv);
-
- if (!gpriv)
- return -ENODEV;
+ struct device *dev;
if (!driver ||
- !driver->unbind ||
- driver != gpriv->driver)
+ !driver->unbind)
return -EINVAL;
+ /*
+ * find controller
+ */
+ usbhsg_for_each_controller(gpriv) {
+ if (gpriv->driver == driver)
+ goto find_matching_controller;
+ }
+ return -ENODEV;
+
+find_matching_controller:
+
dev = usbhsg_gpriv_to_dev(gpriv);
priv = usbhsg_gpriv_to_priv(gpriv);
@@ -911,7 +943,7 @@ int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv)
}
}
- the_controller = gpriv;
+ usbhsg_controller_register(gpriv);
ret = usb_add_gadget_udc(dev, &gpriv->gadget);
if (ret)
@@ -935,6 +967,9 @@ void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv)
struct usbhsg_gpriv *gpriv = usbhsg_priv_to_gpriv(priv);
usb_del_gadget_udc(&gpriv->gadget);
+
+ usbhsg_controller_unregister(gpriv);
+
kfree(gpriv->uep);
kfree(gpriv);
}
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 30461fcc2206..ee28115aa9b4 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -342,10 +342,28 @@ static void pl2303_set_termios(struct tty_struct *tty,
baud = 6000000;
}
dbg("%s - baud set = %d", __func__, baud);
- buf[0] = baud & 0xff;
- buf[1] = (baud >> 8) & 0xff;
- buf[2] = (baud >> 16) & 0xff;
- buf[3] = (baud >> 24) & 0xff;
+ if (baud <= 115200) {
+ buf[0] = baud & 0xff;
+ buf[1] = (baud >> 8) & 0xff;
+ buf[2] = (baud >> 16) & 0xff;
+ buf[3] = (baud >> 24) & 0xff;
+ } else {
+ /* apparently the formula for higher speeds is:
+ * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
+ */
+ unsigned tmp = 12*1000*1000*32 / baud;
+ buf[3] = 0x80;
+ buf[2] = 0;
+ buf[1] = (tmp >= 256);
+ while (tmp >= 256) {
+ tmp >>= 2;
+ buf[1] <<= 1;
+ }
+ if (tmp > 256) {
+ tmp %= 256;
+ }
+ buf[0] = tmp;
+ }
}
/* For reference buf[4]=0 is 1 stop bits */
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-03 18:01:32 +0100