Re: [PATCH] input: driver for USB VoIP phones with CM109 chipset #2
From: Dmitry Torokhov
Date: Fri Jul 25 2008 - 10:14:50 EST
On Sat, Jun 28, 2008 at 05:03:45PM +0200, Alfred E. Heggestad wrote:
> Oliver Neukum wrote:
>> Am Mittwoch 25 Juni 2008 22:07:34 schrieb Alfred E. Heggestad:
>>
>> Very well
>>
>> - urb->status is about to go away and replaced by a parameter
>> - reliably kill two URBs submitting each other cannot be done with
>> usb_kill_urb() alone
>> - you close the device but leave the buzzer on
>> - no support for suspend/resume
>> - no support for pre/post_reset
>>
>> Could you test this new additional patch? The original patch had some
>> issues I corrected.
>>
>
> Hi Oliver,
>
> many many thanks for your patch and your suggested code improvements.
> I have tested your patch and I have some comments:
>
> * The first version of your patch was tested, and it applied cleanly
> and compiled with out any errors. The module was loaded OK, but when
> I inserted the CM109-device into the USB-port, the machine crashed.
> I fixed that issue by adding this to the usb_probe() function:
>
> init_waitqueue_head(&dev->wait);
>
> * The second version of your patch was applied with some local mods.
> This is now working as expected.
>
> * I have tested suspend/resume with 2.6.25.9 and TuxOnIce 3.0-rc7
> and it works fine (cm109 device was plugged in during suspend).
> During suspend I get this in syslog:
>
> drivers/input/misc/cm109.c: cm109: usb_suspend (event=1)
> drivers/input/misc/cm109.c: urb_irq_callback: urb status -2
>
>
> * The flag "char disconnecting:1" is no longer used in your second
> patch, and has been removed from the struct.
>
> * When the buzzer is triggered by SND_TONE/SND_BELL, I get these
> warnings in syslog:
>
> drivers/input/misc/cm109.c: urb_ctl_callback: usb_submit_urb failed -22
> drivers/input/misc/cm109.c: buzz: usb_submit_urb failed -22
> drivers/input/misc/cm109.c: urb_ctl_callback: usb_submit_urb failed -22
> drivers/input/misc/cm109.c: buzz: usb_submit_urb failed -22
>
> It seems that the ctl URB is shared between buzzer and keypress
> handling. I am thinking about adding a new URB just for the buzzer,
> but I am not sure if that really is necesary. Any suggestions?
>
>
> OK, once again - many thanks for your input
>
Hi Alfred,
I tried to adjust the patch to fix isues with CTL URB sharing between
keys and buzzer, bitfield access from process context and IRQ and keymap
loading support. The result is below. Could you please try it and see if
I broke it completely or if it indeed works. The patch depends on some
new key definitions so you probbaly want to fetch 'master' branch form
my tree on kernel.org before applying it.
BTW, can I please have your 'Signed-off-by:' string so I can add it to
the commit?
Thanks!
--
Dmitry
Input: add drievr for USB VoIP phones with CM109 chipset
From: Alfred E. Heggestad <aeh@xxxxxx>
Signed-off-by: Dmitry Torokhov <dtor@xxxxxxx>
---
drivers/input/misc/Kconfig | 12 +
drivers/input/misc/Makefile | 1
drivers/input/misc/cm109.c | 862 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 875 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/misc/cm109.c
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index e99b788..987e4b7 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -180,6 +180,18 @@ config INPUT_YEALINK
To compile this driver as a module, choose M here: the module will be
called yealink.
+config INPUT_CM109
+ tristate "C-Media CM109 USB I/O Controller"
+ depends on INPUT && EXPERIMENTAL
+ select USB
+ ---help---
+ Say Y here if you want to enable keyboard and buzzer functions of the
+ C-Media CM109 usb phones. The audio part is enabled by the generic
+ usb sound driver, so you might want to enable that as well.
+
+ To compile this driver as a module, choose M here: the module will be
+ called cm109.
+
config INPUT_UINPUT
tristate "User level driver support"
help
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index f48009b..d7db2ae 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_INPUT_ATI_REMOTE2) += ati_remote2.o
obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o
obj-$(CONFIG_INPUT_POWERMATE) += powermate.o
obj-$(CONFIG_INPUT_YEALINK) += yealink.o
+obj-$(CONFIG_INPUT_CM109) += cm109.o
obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
obj-$(CONFIG_INPUT_UINPUT) += uinput.o
obj-$(CONFIG_INPUT_APANEL) += apanel.o
diff --git a/drivers/input/misc/cm109.c b/drivers/input/misc/cm109.c
new file mode 100644
index 0000000..d1ef394
--- /dev/null
+++ b/drivers/input/misc/cm109.c
@@ -0,0 +1,862 @@
+/*
+ * Driver for the VoIP USB phones with CM109 chipsets.
+ *
+ * Copyright (C) 2007 - 2008 Alfred E. Heggestad <aeh@xxxxxx>
+ *
+ * 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, version 2.
+ */
+
+/*
+ * Tested devices:
+ * - Komunikate KIP1000
+ * - Genius G-talk
+ * - Allied-Telesis Corega USBPH01
+ * - ...
+ *
+ * This driver is based on the yealink.c driver
+ *
+ * Thanks to:
+ * - Authors of yealink.c
+ * - Thomas Reitmayr
+ * - Oliver Neukum for good review comments and code
+ * - Shaun Jackman <sjackman@xxxxxxxxx> for Genius G-talk keymap
+ *
+ * Todo:
+ * - Fix bug with buzz and urb_ctl_callback:usb_submit_urb() -EINVAL
+ * - Fix KEY_KPPOUND
+ * - Read/write EEPROM
+ * - Report input events volume up/down
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/rwsem.h>
+#include <linux/usb/input.h>
+
+#define CM109_DEBUG 0
+
+#define DRIVER_VERSION "20080628"
+#define DRIVER_AUTHOR "Alfred E. Heggestad"
+#define DRIVER_DESC "CM109 phone driver"
+
+static char *phone = "kip1000";
+module_param(phone, charp, S_IRUSR);
+MODULE_PARM_DESC(phone, "Phone name {kip1000, gtalk, usbph01}");
+
+enum {
+ /* HID Registers */
+ HID_IR0 = 0x00, /* Record/Playback-mute button, Volume up/down */
+ HID_IR1 = 0x01, /* GPI, generic registers or EEPROM_DATA0 */
+ HID_IR2 = 0x02, /* Generic registers or EEPROM_DATA1 */
+ HID_IR3 = 0x03, /* Generic registers or EEPROM_CTRL */
+ HID_OR0 = 0x00, /* Mapping control, buzzer, SPDIF (offset 0x04) */
+ HID_OR1 = 0x01, /* GPO - General Purpose Output */
+ HID_OR2 = 0x02, /* Set GPIO to input/output mode */
+ HID_OR3 = 0x03, /* SPDIF status channel or EEPROM_CTRL */
+
+ /* HID_IR0 */
+ RECORD_MUTE = 1 << 3,
+ PLAYBACK_MUTE = 1 << 2,
+ VOLUME_DOWN = 1 << 1,
+ VOLUME_UP = 1 << 0,
+
+ /* HID_OR0 */
+ /* bits 7-6
+ 0: HID_OR1-2 are used for GPO; HID_OR0, 3 are used for buzzer
+ and SPDIF
+ 1: HID_OR0-3 are used as generic HID registers
+ 2: Values written to HID_OR0-3 are also mapped to MCU_CTRL,
+ EEPROM_DATA0-1, EEPROM_CTRL (see Note)
+ 3: Reserved
+ */
+ HID_OR_GPO_BUZ_SPDIF = 0 << 6,
+ HID_OR_GENERIC_HID_REG = 1 << 6,
+ HID_OR_MAP_MCU_EEPROM = 2 << 6,
+
+ BUZZER_ON = 1 << 5,
+};
+
+/* CM109 protocol packet */
+struct cm109_ctl_packet {
+ u8 byte[4];
+} __attribute__ ((packed));
+
+enum { USB_PKT_LEN = sizeof(struct cm109_ctl_packet) };
+
+/* CM109 device structure */
+struct cm109_dev {
+ struct input_dev *idev; /* input device */
+ struct usb_device *udev; /* usb device */
+ struct usb_interface *intf;
+
+ /* irq input channel */
+ struct cm109_ctl_packet *irq_data;
+ dma_addr_t irq_dma;
+ struct urb *urb_irq;
+
+ /* control output channel */
+ struct cm109_ctl_packet *ctl_data;
+ dma_addr_t ctl_dma;
+ struct usb_ctrlrequest *ctl_req;
+ dma_addr_t ctl_req_dma;
+ struct urb *urb_ctl;
+ /*
+ * The 2 bitfields below are protected by ctl_submit_lock.
+ * They have to be separate since they are accessed from IRQ
+ * context.
+ */
+ unsigned ctl_urb_pending:1; /* ctl_urb is in flight */
+ unsigned buzzer_pending:1; /* need to issue buzz command */
+ spinlock_t ctl_submit_lock;
+
+ unsigned char buzzer_state; /* on/off */
+
+ /* flags */
+ unsigned open:1;
+ unsigned resetting:1;
+ unsigned shutting_down:1;
+
+ /* This mutex protects writes to the above flags */
+ struct mutex pm_mutex;
+
+ unsigned short keymap[256];
+
+ char phys[64]; /* physical device path */
+ int key_code; /* last reported key */
+ int keybit; /* 0=new scan 1,2,4,8=scan columns */
+ u8 gpi; /* Cached value of GPI (high nibble) */
+};
+
+/******************************************************************************
+ * CM109 key interface
+ *****************************************************************************/
+
+/* Map device buttons to internal key events.
+ *
+ * The "up" and "down" keys, are symbolised by arrows on the button.
+ * The "pickup" and "hangup" keys are symbolised by a green and red phone
+ * on the button.
+
+ Komunikate KIP1000 Keyboard Matrix
+
+ -> -- 1 -- 2 -- 3 --> GPI pin 4 (0x10)
+ | | | |
+ <- -- 4 -- 5 -- 6 --> GPI pin 5 (0x20)
+ | | | |
+ END - 7 -- 8 -- 9 --> GPI pin 6 (0x40)
+ | | | |
+ OK -- * -- 0 -- # --> GPI pin 7 (0x80)
+ | | | |
+
+ /|\ /|\ /|\ /|\
+ | | | |
+GPO
+pin: 3 2 1 0
+ 0x8 0x4 0x2 0x1
+
+ */
+static unsigned short keymap_kip1000(int scancode)
+{
+ switch (scancode) { /* phone key: */
+ case 0x82: return KEY_NUMERIC_0; /* 0 */
+ case 0x14: return KEY_NUMERIC_1; /* 1 */
+ case 0x12: return KEY_NUMERIC_2; /* 2 */
+ case 0x11: return KEY_NUMERIC_3; /* 3 */
+ case 0x24: return KEY_NUMERIC_4; /* 4 */
+ case 0x22: return KEY_NUMERIC_5; /* 5 */
+ case 0x21: return KEY_NUMERIC_6; /* 6 */
+ case 0x44: return KEY_NUMERIC_7; /* 7 */
+ case 0x42: return KEY_NUMERIC_8; /* 8 */
+ case 0x41: return KEY_NUMERIC_9; /* 9 */
+ case 0x81: return KEY_NUMERIC_POUND; /* # */
+ case 0x84: return KEY_NUMERIC_STAR; /* * */
+ case 0x88: return KEY_ENTER; /* pickup */
+ case 0x48: return KEY_ESC; /* hangup */
+ case 0x28: return KEY_LEFT; /* IN */
+ case 0x18: return KEY_RIGHT; /* OUT */
+ default: return KEY_RESERVED;
+ }
+}
+
+/*
+ Contributed by Shaun Jackman <sjackman@xxxxxxxxx>
+
+ Genius G-Talk keyboard matrix
+ 0 1 2 3
+ 4: 0 4 8 Talk
+ 5: 1 5 9 End
+ 6: 2 6 # Up
+ 7: 3 7 * Down
+*/
+static unsigned short keymap_gtalk(int scancode)
+{
+ switch (scancode) {
+ case 0x11: return KEY_NUMERIC_0;
+ case 0x21: return KEY_NUMERIC_1;
+ case 0x41: return KEY_NUMERIC_2;
+ case 0x81: return KEY_NUMERIC_3;
+ case 0x12: return KEY_NUMERIC_4;
+ case 0x22: return KEY_NUMERIC_5;
+ case 0x42: return KEY_NUMERIC_6;
+ case 0x82: return KEY_NUMERIC_7;
+ case 0x14: return KEY_NUMERIC_8;
+ case 0x24: return KEY_NUMERIC_9;
+ case 0x44: return KEY_NUMERIC_POUND; /* # */
+ case 0x84: return KEY_NUMERIC_STAR; /* * */
+ case 0x18: return KEY_ENTER; /* Talk (green handset) */
+ case 0x28: return KEY_ESC; /* End (red handset) */
+ case 0x48: return KEY_UP; /* Menu up (rocker switch) */
+ case 0x88: return KEY_DOWN; /* Menu down (rocker switch) */
+ default: return KEY_RESERVED;
+ }
+}
+
+/*
+ * Keymap for Allied-Telesis Corega USBPH01
+ * http://www.alliedtelesis-corega.com/2/1344/1437/1360/chprd.html
+ *
+ * Contributed by july@xxxxxx
+ */
+static unsigned short keymap_usbph01(int scancode)
+{
+ switch (scancode) {
+ case 0x11: return KEY_NUMERIC_0; /* 0 */
+ case 0x21: return KEY_NUMERIC_1; /* 1 */
+ case 0x41: return KEY_NUMERIC_2; /* 2 */
+ case 0x81: return KEY_NUMERIC_3; /* 3 */
+ case 0x12: return KEY_NUMERIC_4; /* 4 */
+ case 0x22: return KEY_NUMERIC_5; /* 5 */
+ case 0x42: return KEY_NUMERIC_6; /* 6 */
+ case 0x82: return KEY_NUMERIC_7; /* 7 */
+ case 0x14: return KEY_NUMERIC_8; /* 8 */
+ case 0x24: return KEY_NUMERIC_9; /* 9 */
+ case 0x44: return KEY_NUMERIC_POUND; /* # */
+ case 0x84: return KEY_NUMERIC_STAR; /* * */
+ case 0x18: return KEY_ENTER; /* pickup */
+ case 0x28: return KEY_ESC; /* hangup */
+ case 0x48: return KEY_LEFT; /* IN */
+ case 0x88: return KEY_RIGHT; /* OUT */
+ default: return KEY_RESERVED;
+ }
+}
+
+static unsigned short (*keymap)(int) = keymap_kip1000;
+
+/*
+ * Completes a request by converting the data into events for the
+ * input subsystem.
+ */
+static void report_key(struct cm109_dev *dev, int key)
+{
+ struct input_dev *idev = dev->idev;
+
+ if (dev->key_code >= 0) {
+ /* old key up */
+ input_report_key(idev, dev->key_code, 0);
+ }
+
+ dev->key_code = key;
+ if (key >= 0) {
+ /* new valid key */
+ input_report_key(idev, key, 1);
+ }
+
+ input_sync(idev);
+}
+
+/******************************************************************************
+ * CM109 usb communication interface
+ *****************************************************************************/
+
+static void cm109_submit_buzz_toggle(struct cm109_dev *dev)
+{
+ int error;
+
+ if (dev->buzzer_state)
+ dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
+ else
+ dev->ctl_data->byte[HID_OR0] &= ~BUZZER_ON;
+
+ error = usb_submit_urb(dev->urb_ctl, GFP_ATOMIC);
+ if (error)
+ err("%s: usb_submit_urb failed %d", __func__, error);
+}
+
+/*
+ * IRQ handler
+ */
+static void cm109_urb_irq_callback(struct urb *urb)
+{
+ struct cm109_dev *dev = urb->context;
+ const int status = urb->status;
+ int error;
+
+#if CM109_DEBUG
+ info("### URB IRQ: [0x%02x 0x%02x 0x%02x 0x%02x] keybit=0x%02x",
+ dev->irq_data->byte[0],
+ dev->irq_data->byte[1],
+ dev->irq_data->byte[2],
+ dev->irq_data->byte[3],
+ dev->keybit);
+#endif
+
+ if (status) {
+ if (status == -ESHUTDOWN)
+ return;
+ err("%s: urb status %d", __func__, status);
+ }
+
+ /* Scan key column */
+ if (dev->keybit == 0x0f) {
+
+ /* Any changes ? */
+ if ((dev->gpi & 0xf0) == (dev->irq_data->byte[HID_IR1] & 0xf0))
+ goto out;
+
+ dev->gpi = dev->irq_data->byte[HID_IR1] & 0xf0;
+ dev->keybit = 0x1;
+ } else {
+ report_key(dev, dev->keymap[dev->irq_data->byte[HID_IR1]]);
+
+ dev->keybit <<= 1;
+ if (dev->keybit > 0x8)
+ dev->keybit = 0xf;
+ }
+
+ out:
+
+ spin_lock(&dev->ctl_submit_lock);
+
+ if (likely(!dev->shutting_down)) {
+
+ if (dev->buzzer_state)
+ dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
+ else
+ dev->ctl_data->byte[HID_OR0] &= ~BUZZER_ON;
+
+ dev->ctl_data->byte[HID_OR1] = dev->keybit;
+ dev->ctl_data->byte[HID_OR2] = dev->keybit;
+
+ dev->buzzer_pending = 0;
+ dev->ctl_urb_pending = 1;
+
+ error = usb_submit_urb(dev->urb_ctl, GFP_ATOMIC);
+ if (error)
+ err("%s: usb_submit_urb failed %d", __func__, error);
+ }
+
+ spin_unlock(&dev->ctl_submit_lock);
+}
+
+static void cm109_urb_ctl_callback(struct urb *urb)
+{
+ struct cm109_dev *dev = urb->context;
+ const int status = urb->status;
+ int error;
+
+#if CM109_DEBUG
+ info("### URB CTL: [0x%02x 0x%02x 0x%02x 0x%02x]",
+ dev->ctl_data->byte[0],
+ dev->ctl_data->byte[1],
+ dev->ctl_data->byte[2],
+ dev->ctl_data->byte[3]);
+#endif
+
+ if (status)
+ err("%s: urb status %d", __func__, status);
+
+ spin_lock(&dev->ctl_submit_lock);
+
+ dev->ctl_urb_pending = 0;
+
+ if (likely(!dev->shutting_down)) {
+
+ if (dev->buzzer_pending) {
+ dev->buzzer_pending = 0;
+ dev->ctl_urb_pending = 1;
+ cm109_submit_buzz_toggle(dev);
+ } else {
+ /* ask for key data */
+ error = usb_submit_urb(dev->urb_irq, GFP_ATOMIC);
+ if (error)
+ err("%s: usb_submit_urb (urb_irq) failed %d",
+ __func__, error);
+ }
+ }
+
+ spin_unlock(&dev->ctl_submit_lock);
+}
+
+static void cm109_toggle_buzzer_async(struct cm109_dev *dev)
+{
+ unsigned long flags;
+
+ dbg("Buzzer %s", on ? "on" : "off");
+
+ spin_lock_irqsave(&dev->ctl_submit_lock, flags);
+
+ if (dev->ctl_urb_pending) {
+ /* URB completion will resubmit */
+ dev->buzzer_pending = 1;
+ } else {
+ dev->ctl_urb_pending = 1;
+ cm109_submit_buzz_toggle(dev);
+ }
+
+ spin_unlock_irqrestore(&dev->ctl_submit_lock, flags);
+}
+
+static void cm109_toggle_buzzer_sync(struct cm109_dev *dev, int on)
+{
+ int error;
+
+ if (on)
+ dev->ctl_data->byte[HID_OR0] |= BUZZER_ON;
+ else
+ dev->ctl_data->byte[HID_OR0] &= ~BUZZER_ON;
+
+ error = usb_control_msg(dev->udev,
+ usb_sndctrlpipe(dev->udev, 0),
+ dev->ctl_req->bRequest,
+ dev->ctl_req->bRequestType,
+ le16_to_cpu(dev->ctl_req->wValue),
+ le16_to_cpu(dev->ctl_req->wIndex),
+ dev->ctl_data,
+ USB_PKT_LEN, USB_CTRL_SET_TIMEOUT);
+ if (error)
+ err("%s: usb_control_msg) failed %d", __func__, error);
+}
+
+static void cm109_stop_traffic(struct cm109_dev *dev)
+{
+ dev->shutting_down = 1;
+ /*
+ * Make sure other CPUs see this
+ */
+ smp_wmb();
+
+ usb_kill_urb(dev->urb_ctl);
+ usb_kill_urb(dev->urb_irq);
+
+ cm109_toggle_buzzer_sync(dev, 0);
+
+ dev->shutting_down = 0;
+ smp_wmb();
+}
+
+static void cm109_restore_state(struct cm109_dev *dev)
+{
+ if (dev->open) {
+ /*
+ * Restore buzzer state.
+ * This will also kick regular URB submission
+ */
+ cm109_toggle_buzzer_async(dev);
+ }
+}
+
+/******************************************************************************
+ * input event interface
+ *****************************************************************************/
+
+static int cm109_input_open(struct input_dev *idev)
+{
+ struct cm109_dev *dev = input_get_drvdata(idev);
+ int error;
+
+ error = usb_autopm_get_interface(dev->intf);
+ if (error < 0) {
+ err("%s - cannot autoresume, result %d",
+ __func__, error);
+ return error;
+ }
+
+ mutex_lock(&dev->pm_mutex);
+
+ dev->buzzer_state = 0;
+ dev->key_code = -1; /* no keys pressed */
+ dev->keybit = 0xf;
+
+ /* issue INIT */
+ dev->ctl_data->byte[HID_OR0] = HID_OR_GPO_BUZ_SPDIF;
+ dev->ctl_data->byte[HID_OR1] = dev->keybit;
+ dev->ctl_data->byte[HID_OR2] = dev->keybit;
+ dev->ctl_data->byte[HID_OR3] = 0x00;
+
+ error = usb_submit_urb(dev->urb_ctl, GFP_KERNEL);
+ if (error) {
+ err("%s: usb_submit_urb failed with result %d",
+ __func__, error);
+ } else
+ dev->open = 1;
+
+ mutex_unlock(&dev->pm_mutex);
+
+ if (error)
+ usb_autopm_put_interface(dev->intf);
+
+ return error;
+}
+
+static void cm109_input_close(struct input_dev *idev)
+{
+ struct cm109_dev *dev = input_get_drvdata(idev);
+
+ mutex_lock(&dev->pm_mutex);
+
+ /*
+ * Once we are here event delivery is stopped so we
+ * don't need to worry about someone starting buzzer
+ * again
+ */
+ cm109_stop_traffic(dev);
+ dev->open = 0;
+
+ mutex_unlock(&dev->pm_mutex);
+
+ usb_autopm_put_interface(dev->intf);
+}
+
+static int cm109_input_ev(struct input_dev *idev, unsigned int type,
+ unsigned int code, int value)
+{
+ struct cm109_dev *dev = input_get_drvdata(idev);
+
+#if CM109_DEBUG
+ info("input_ev: type=%u code=%u value=%d", type, code, value);
+#endif
+
+ if (type != EV_SND)
+ return -EINVAL;
+
+ switch (code) {
+ case SND_TONE:
+ case SND_BELL:
+ dev->buzzer_state = !!value;
+ if (!dev->resetting)
+ cm109_toggle_buzzer_async(dev);
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+
+/******************************************************************************
+ * Linux interface and usb initialisation
+ *****************************************************************************/
+
+struct driver_info {
+ char *name;
+};
+
+static const struct driver_info info_cm109 = {
+ .name = "CM109 USB driver",
+};
+
+enum {
+ VENDOR_ID = 0x0d8c, /* C-Media Electronics */
+ PRODUCT_ID_CM109 = 0x000e, /* CM109 defines range 0x0008 - 0x000f */
+};
+
+/* table of devices that work with this driver */
+static const struct usb_device_id cm109_usb_table[] = {
+ {
+ .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
+ USB_DEVICE_ID_MATCH_INT_INFO,
+ .idVendor = VENDOR_ID,
+ .idProduct = PRODUCT_ID_CM109,
+ .bInterfaceClass = USB_CLASS_HID,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = 0,
+ .driver_info = (kernel_ulong_t) &info_cm109
+ },
+ /* you can add more devices here with product ID 0x0008 - 0x000f */
+ { }
+};
+
+static void cm109_usb_cleanup(struct cm109_dev *dev)
+{
+ if (dev->ctl_req)
+ usb_buffer_free(dev->udev, sizeof(*(dev->ctl_req)),
+ dev->ctl_req, dev->ctl_req_dma);
+ if (dev->ctl_data)
+ usb_buffer_free(dev->udev, USB_PKT_LEN,
+ dev->ctl_data, dev->ctl_dma);
+ if (dev->irq_data)
+ usb_buffer_free(dev->udev, USB_PKT_LEN,
+ dev->irq_data, dev->irq_dma);
+
+ usb_free_urb(dev->urb_irq); /* parameter validation in core/urb */
+ usb_free_urb(dev->urb_ctl); /* parameter validation in core/urb */
+ kfree(dev);
+}
+
+static void cm109_usb_disconnect(struct usb_interface *interface)
+{
+ struct cm109_dev *dev = usb_get_intfdata(interface);
+
+ usb_set_intfdata(interface, NULL);
+ input_unregister_device(dev->idev);
+ cm109_usb_cleanup(dev);
+}
+
+static int cm109_usb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct driver_info *nfo = (struct driver_info *)id->driver_info;
+ struct usb_host_interface *interface;
+ struct usb_endpoint_descriptor *endpoint;
+ struct cm109_dev *dev;
+ struct input_dev *input_dev = NULL;
+ int ret, pipe, i;
+ int error = -ENOMEM;
+
+ interface = intf->cur_altsetting;
+ endpoint = &interface->endpoint[0].desc;
+
+ if (!usb_endpoint_is_int_in(endpoint))
+ return -ENODEV;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ spin_lock_init(&dev->ctl_submit_lock);
+ mutex_init(&dev->pm_mutex);
+
+ dev->udev = udev;
+ dev->intf = intf;
+
+ dev->idev = input_dev = input_allocate_device();
+ if (!input_dev)
+ goto err_out;
+
+ /* allocate usb buffers */
+ dev->irq_data = usb_buffer_alloc(udev, USB_PKT_LEN,
+ GFP_KERNEL, &dev->irq_dma);
+ if (!dev->irq_data)
+ goto err_out;
+
+ dev->ctl_data = usb_buffer_alloc(udev, USB_PKT_LEN,
+ GFP_KERNEL, &dev->ctl_dma);
+ if (!dev->ctl_data)
+ goto err_out;
+
+ dev->ctl_req = usb_buffer_alloc(udev, sizeof(*(dev->ctl_req)),
+ GFP_KERNEL, &dev->ctl_req_dma);
+ if (!dev->ctl_req)
+ goto err_out;
+
+ /* allocate urb structures */
+ dev->urb_irq = usb_alloc_urb(0, GFP_KERNEL);
+ if (!dev->urb_irq)
+ goto err_out;
+
+ dev->urb_ctl = usb_alloc_urb(0, GFP_KERNEL);
+ if (!dev->urb_ctl)
+ goto err_out;
+
+ /* get a handle to the interrupt data pipe */
+ pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
+ ret = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
+ if (ret != USB_PKT_LEN)
+ err("invalid payload size %d, expected %d", ret, USB_PKT_LEN);
+
+ /* initialise irq urb */
+ usb_fill_int_urb(dev->urb_irq, udev, pipe, dev->irq_data,
+ USB_PKT_LEN,
+ cm109_urb_irq_callback, dev, endpoint->bInterval);
+ dev->urb_irq->transfer_dma = dev->irq_dma;
+ dev->urb_irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ dev->urb_irq->dev = udev;
+
+ /* initialise ctl urb */
+ dev->ctl_req->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE |
+ USB_DIR_OUT;
+ dev->ctl_req->bRequest = USB_REQ_SET_CONFIGURATION;
+ dev->ctl_req->wValue = cpu_to_le16(0x200);
+ dev->ctl_req->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
+ dev->ctl_req->wLength = cpu_to_le16(USB_PKT_LEN);
+
+ usb_fill_control_urb(dev->urb_ctl, udev, usb_sndctrlpipe(udev, 0),
+ (void *)dev->ctl_req, dev->ctl_data, USB_PKT_LEN,
+ cm109_urb_ctl_callback, dev);
+ dev->urb_ctl->setup_dma = dev->ctl_req_dma;
+ dev->urb_ctl->transfer_dma = dev->ctl_dma;
+ dev->urb_ctl->transfer_flags |= URB_NO_SETUP_DMA_MAP |
+ URB_NO_TRANSFER_DMA_MAP;
+ dev->urb_ctl->dev = udev;
+
+ /* find out the physical bus location */
+ usb_make_path(udev, dev->phys, sizeof(dev->phys));
+ strlcat(dev->phys, "/input0", sizeof(dev->phys));
+
+ /* register settings for the input device */
+ input_dev->name = nfo->name;
+ input_dev->phys = dev->phys;
+ usb_to_input_id(udev, &input_dev->id);
+ input_dev->dev.parent = &intf->dev;
+
+ input_set_drvdata(input_dev, dev);
+ input_dev->open = cm109_input_open;
+ input_dev->close = cm109_input_close;
+ input_dev->event = cm109_input_ev;
+
+ input_dev->keycode = dev->keymap;
+ input_dev->keycodesize = sizeof(unsigned char);
+ input_dev->keycodemax = ARRAY_SIZE(dev->keymap);
+
+ input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_SND);
+ input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
+
+ /* register available key events */
+ for (i = 0; i < 256; i++) {
+ unsigned short k = keymap(i);
+ dev->keymap[i] = k;
+ __set_bit(k, input_dev->keybit);
+ }
+ __clear_bit(KEY_RESERVED, input_dev->keybit);
+
+ error = input_register_device(dev->idev);
+ if (error)
+ goto err_out;
+
+ usb_set_intfdata(intf, dev);
+
+ return 0;
+
+ err_out:
+ input_free_device(input_dev);
+ cm109_usb_cleanup(dev);
+ return error;
+}
+
+static int cm109_usb_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct cm109_dev *dev = usb_get_intfdata(intf);
+
+ info("cm109: usb_suspend (event=%d)", message.event);
+
+ mutex_lock(&dev->pm_mutex);
+ cm109_stop_traffic(dev);
+ mutex_unlock(&dev->pm_mutex);
+
+ return 0;
+}
+
+static int cm109_usb_resume(struct usb_interface *intf)
+{
+ struct cm109_dev *dev = usb_get_intfdata(intf);
+
+ info("cm109: usb_resume");
+
+ mutex_lock(&dev->pm_mutex);
+ cm109_restore_state(dev);
+ mutex_unlock(&dev->pm_mutex);
+
+ return 0;
+}
+
+static int cm109_usb_pre_reset(struct usb_interface *intf)
+{
+ struct cm109_dev *dev = usb_get_intfdata(intf);
+
+ mutex_lock(&dev->pm_mutex);
+
+ /*
+ * Make sure input events don't try to toggle buzzer
+ * while we are resetting
+ */
+ dev->resetting = 1;
+ smp_wmb();
+
+ cm109_stop_traffic(dev);
+
+ return 0;
+}
+
+static int cm109_usb_post_reset(struct usb_interface *intf)
+{
+ struct cm109_dev *dev = usb_get_intfdata(intf);
+
+ dev->resetting = 0;
+ smp_wmb();
+
+ cm109_restore_state(dev);
+
+ mutex_unlock(&dev->pm_mutex);
+
+ return 0;
+}
+
+static struct usb_driver cm109_driver = {
+ .name = "cm109",
+ .probe = cm109_usb_probe,
+ .disconnect = cm109_usb_disconnect,
+ .suspend = cm109_usb_suspend,
+ .resume = cm109_usb_resume,
+ .reset_resume = cm109_usb_resume,
+ .pre_reset = cm109_usb_pre_reset,
+ .post_reset = cm109_usb_post_reset,
+ .id_table = cm109_usb_table,
+ .supports_autosuspend = 1,
+};
+
+static int __init cm109_select_keymap(void)
+{
+ /* Load the phone keymap */
+ if (!strcasecmp(phone, "kip1000")) {
+ keymap = keymap_kip1000;
+ info("Keymap for Komunikate KIP1000 phone loaded");
+ } else if (!strcasecmp(phone, "gtalk")) {
+ keymap = keymap_gtalk;
+ info("Keymap for Genius G-talk phone loaded");
+ } else if (!strcasecmp(phone, "usbph01")) {
+ keymap = keymap_usbph01;
+ info("Keymap for Allied-Telesis Corega USBPH01 phone loaded");
+ } else {
+ err("Unsupported phone: %s", phone);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int __init cm109_init(void)
+{
+ int err;
+
+ err = cm109_select_keymap();
+ if (err)
+ return err;
+
+ err = usb_register(&cm109_driver);
+ if (err)
+ return err;
+
+ info(DRIVER_DESC ": " DRIVER_VERSION " (C) " DRIVER_AUTHOR);
+
+ return 0;
+}
+
+static void __exit cm109_exit(void)
+{
+ usb_deregister(&cm109_driver);
+}
+
+module_init(cm109_init);
+module_exit(cm109_exit);
+
+MODULE_DEVICE_TABLE(usb, cm109_usb_table);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
--
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