diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-25 23:08:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-25 23:08:32 -0700 |
| commit | f549953c15deab4c54708b39af86d4edecc6cddc (patch) | |
| tree | f0412f989b77cdceab34c18aa85a8a25d5942a1f /drivers/usb/serial/pl2303.c | |
| parent | f0deb97ab13ad1f89cd0993f7339655d59788405 (diff) | |
| parent | e04f5f7e423018bcec84c11af2058cdce87816f3 (diff) | |
Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (115 commits)
EHCI: fix direction handling for interrupt data toggles
USB: serial: add IDs for WinChipHead USB->RS232 adapter
USB: OHCI: fix another regression for NVIDIA controllers
usb: gadget: m66592-udc: add pullup function
usb: gadget: m66592-udc: add function for external controller
usb: gadget: r8a66597-udc: add pullup function
usb: renesas_usbhs: support multi driver
usb: renesas_usbhs: inaccessible pipe is not an error
usb: renesas_usbhs: care buff alignment when dma handler
USB: PL2303: correctly handle baudrates above 115200
usb: r8a66597-hcd: fixup USB_PORT_STAT_C_SUSPEND shift
usb: renesas_usbhs: compile/config are rescued
usb: renesas_usbhs: fixup comment-out
usb: update email address in ohci-sh and r8a66597-hcd
usb: r8a66597-hcd: add function for external controller
EHCI: only power off port if over-current is active
USB: mon: Allow to use usbmon without debugfs
USB: EHCI: go back to using the system clock for QH unlinks
ehci: add pci quirk for Ordissimo and RM Slate 100 too
ehci: refactor pci quirk to use standard dmi_check_system method
...
Fix up trivial conflicts in Documentation/feature-removal-schedule.txt
Diffstat (limited to 'drivers/usb/serial/pl2303.c')
| -rw-r--r-- | drivers/usb/serial/pl2303.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 30461fcc220..1d33260de01 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -91,6 +91,7 @@ static const struct usb_device_id id_table[] = { { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, + { USB_DEVICE(WINCHIPHEAD_VENDOR_ID, WINCHIPHEAD_USBSER_PRODUCT_ID) }, { } /* Terminating entry */ }; @@ -342,10 +343,28 @@ 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 */ |