diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/f81232.c | 135 |
1 files changed, 134 insertions, 1 deletions
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c index d27876e64e9d..dcda7fb164b4 100644 --- a/drivers/usb/serial/f81232.c +++ b/drivers/usb/serial/f81232.c @@ -36,6 +36,9 @@ { USB_DEVICE(0x2c42, 0x1635) }, /* 8 port UART device */ \ { USB_DEVICE(0x2c42, 0x1636) } /* 12 port UART device */ +#define F81534A_CTRL_ID \ + { USB_DEVICE(0x2c42, 0x16f8) } /* Global control device */ + static const struct usb_device_id f81232_id_table[] = { F81232_ID, { } /* Terminating entry */ @@ -46,9 +49,15 @@ static const struct usb_device_id f81534a_id_table[] = { { } /* Terminating entry */ }; +static const struct usb_device_id f81534a_ctrl_id_table[] = { + F81534A_CTRL_ID, + { } /* Terminating entry */ +}; + static const struct usb_device_id combined_id_table[] = { F81232_ID, F81534A_SERIES_ID, + F81534A_CTRL_ID, { } /* Terminating entry */ }; MODULE_DEVICE_TABLE(usb, combined_id_table); @@ -61,6 +70,7 @@ MODULE_DEVICE_TABLE(usb, combined_id_table); #define F81232_REGISTER_REQUEST 0xa0 #define F81232_GET_REGISTER 0xc0 #define F81232_SET_REGISTER 0x40 +#define F81534A_ACCESS_REG_RETRY 2 #define SERIAL_BASE_ADDRESS 0x0120 #define RECEIVE_BUFFER_REGISTER (0x00 + SERIAL_BASE_ADDRESS) @@ -101,6 +111,8 @@ MODULE_DEVICE_TABLE(usb, combined_id_table); #define F81534A_GPIO_MODE1_OUTPUT BIT(1) #define F81534A_GPIO_MODE0_OUTPUT BIT(0) +#define F81534A_CTRL_CMD_ENABLE_PORT 0x116 + struct f81232_private { struct mutex lock; u8 modem_control; @@ -848,6 +860,93 @@ static void f81232_lsr_worker(struct work_struct *work) dev_warn(&port->dev, "read LSR failed: %d\n", status); } +static int f81534a_ctrl_set_register(struct usb_interface *intf, u16 reg, + u16 size, void *val) +{ + struct usb_device *dev = interface_to_usbdev(intf); + int retry = F81534A_ACCESS_REG_RETRY; + int status; + u8 *tmp; + + tmp = kmemdup(val, size, GFP_KERNEL); + if (!tmp) + return -ENOMEM; + + while (retry--) { + status = usb_control_msg(dev, + usb_sndctrlpipe(dev, 0), + F81232_REGISTER_REQUEST, + F81232_SET_REGISTER, + reg, + 0, + tmp, + size, + USB_CTRL_SET_TIMEOUT); + if (status < 0) { + status = usb_translate_errors(status); + if (status == -EIO) + continue; + } else if (status != size) { + /* Retry on short transfers */ + status = -EIO; + continue; + } else { + status = 0; + } + + break; + } + + if (status) { + dev_err(&intf->dev, "failed to set register 0x%x: %d\n", + reg, status); + } + + kfree(tmp); + return status; +} + +static int f81534a_ctrl_enable_all_ports(struct usb_interface *intf, bool en) +{ + unsigned char enable[2] = {0}; + int status; + + /* + * Enable all available serial ports, define as following: + * bit 15 : Reset behavior (when HUB got soft reset) + * 0: maintain all serial port enabled state. + * 1: disable all serial port. + * bit 0~11 : Serial port enable bit. + */ + if (en) { + enable[0] = 0xff; + enable[1] = 0x8f; + } + + status = f81534a_ctrl_set_register(intf, F81534A_CTRL_CMD_ENABLE_PORT, + sizeof(enable), enable); + if (status) + dev_err(&intf->dev, "failed to enable ports: %d\n", status); + + return status; +} + +static int f81534a_ctrl_probe(struct usb_interface *intf, + const struct usb_device_id *id) +{ + return f81534a_ctrl_enable_all_ports(intf, true); +} + +static void f81534a_ctrl_disconnect(struct usb_interface *intf) +{ + f81534a_ctrl_enable_all_ports(intf, false); +} + +static int f81534a_ctrl_resume(struct usb_interface *intf) +{ + return f81534a_ctrl_enable_all_ports(intf, true); +} + static int f81232_port_probe(struct usb_serial_port *port) { struct f81232_private *priv; @@ -975,7 +1074,41 @@ static struct usb_serial_driver * const serial_drivers[] = { NULL, }; -module_usb_serial_driver(serial_drivers, combined_id_table); +static struct usb_driver f81534a_ctrl_driver = { + .name = "f81534a_ctrl", + .id_table = f81534a_ctrl_id_table, + .probe = f81534a_ctrl_probe, + .disconnect = f81534a_ctrl_disconnect, + .resume = f81534a_ctrl_resume, +}; + +static int __init f81232_init(void) +{ + int status; + + status = usb_register_driver(&f81534a_ctrl_driver, THIS_MODULE, + KBUILD_MODNAME); + if (status) + return status; + + status = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, + combined_id_table); + if (status) { + usb_deregister(&f81534a_ctrl_driver); + return status; + } + + return 0; +} + +static void __exit f81232_exit(void) +{ + usb_serial_deregister_drivers(serial_drivers); + usb_deregister(&f81534a_ctrl_driver); +} + +module_init(f81232_init); +module_exit(f81232_exit); MODULE_DESCRIPTION("Fintek F81232/532A/534A/535/536 USB to serial driver"); MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |