| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 2000,2001,2002,2003,2004,2005,2007,2008,2009,2010 Free Software Foundation, Inc. |
| * |
| * GRUB 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 3 of the License, or |
| * (at your option) any later version. |
| * |
| * GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <grub/serial.h> |
| #include <grub/types.h> |
| #include <grub/dl.h> |
| #include <grub/misc.h> |
| #include <grub/mm.h> |
| #include <grub/usb.h> |
| #include <grub/usbserial.h> |
| #include <grub/i18n.h> |
| |
| GRUB_MOD_LICENSE ("GPLv3+"); |
| |
| /* Convert speed to divisor. */ |
| static grub_uint32_t |
| is_speed_supported (unsigned int speed) |
| { |
| unsigned int i; |
| unsigned int supported[] = { 2400, 4800, 9600, 19200, 38400, 57600, 115200}; |
| |
| for (i = 0; i < ARRAY_SIZE (supported); i++) |
| if (supported[i] == speed) |
| return 1; |
| return 0; |
| } |
| |
| #define GRUB_PL2303_REQUEST_SET_CONFIG 0x20 |
| #define GRUB_PL2303_STOP_BITS_1 0x0 |
| #define GRUB_PL2303_STOP_BITS_1_5 0x1 |
| #define GRUB_PL2303_STOP_BITS_2 0x2 |
| |
| #define GRUB_PL2303_PARITY_NONE 0 |
| #define GRUB_PL2303_PARITY_ODD 1 |
| #define GRUB_PL2303_PARITY_EVEN 2 |
| |
| struct grub_pl2303_config |
| { |
| grub_uint32_t speed; |
| grub_uint8_t stop_bits; |
| grub_uint8_t parity; |
| grub_uint8_t word_len; |
| } GRUB_PACKED; |
| |
| static void |
| real_config (struct grub_serial_port *port) |
| { |
| struct grub_pl2303_config config_pl2303; |
| char xx; |
| |
| if (port->configured) |
| return; |
| |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_IN, |
| 1, 0x8484, 0, 1, &xx); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT, |
| 1, 0x0404, 0, 0, 0); |
| |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_IN, |
| 1, 0x8484, 0, 1, &xx); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_IN, |
| 1, 0x8383, 0, 1, &xx); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_IN, |
| 1, 0x8484, 0, 1, &xx); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT, |
| 1, 0x0404, 1, 0, 0); |
| |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_IN, |
| 1, 0x8484, 0, 1, &xx); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_IN, |
| 1, 0x8383, 0, 1, &xx); |
| |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT, |
| 1, 0, 1, 0, 0); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT, |
| 1, 1, 0, 0, 0); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT, |
| 1, 2, 0x44, 0, 0); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT, |
| 1, 8, 0, 0, 0); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT, |
| 1, 9, 0, 0, 0); |
| |
| if (port->config.stop_bits == GRUB_SERIAL_STOP_BITS_2) |
| config_pl2303.stop_bits = GRUB_PL2303_STOP_BITS_2; |
| else if (port->config.stop_bits == GRUB_SERIAL_STOP_BITS_1_5) |
| config_pl2303.stop_bits = GRUB_PL2303_STOP_BITS_1_5; |
| else |
| config_pl2303.stop_bits = GRUB_PL2303_STOP_BITS_1; |
| |
| switch (port->config.parity) |
| { |
| case GRUB_SERIAL_PARITY_NONE: |
| config_pl2303.parity = GRUB_PL2303_PARITY_NONE; |
| break; |
| case GRUB_SERIAL_PARITY_ODD: |
| config_pl2303.parity = GRUB_PL2303_PARITY_ODD; |
| break; |
| case GRUB_SERIAL_PARITY_EVEN: |
| config_pl2303.parity = GRUB_PL2303_PARITY_EVEN; |
| break; |
| } |
| |
| config_pl2303.word_len = port->config.word_len; |
| config_pl2303.speed = port->config.speed; |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_CLASS_INTERFACE_OUT, |
| GRUB_PL2303_REQUEST_SET_CONFIG, 0, 0, |
| sizeof (config_pl2303), (char *) &config_pl2303); |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_CLASS_INTERFACE_OUT, |
| 0x22, 3, 0, 0, 0); |
| |
| grub_usb_control_msg (port->usbdev, GRUB_USB_REQTYPE_VENDOR_OUT, |
| 1, 0, port->config.rtscts ? 0x61 : 0, 0, 0); |
| port->configured = 1; |
| } |
| |
| /* Fetch a key. */ |
| static int |
| pl2303_hw_fetch (struct grub_serial_port *port) |
| { |
| real_config (port); |
| |
| return grub_usbserial_fetch (port, 0); |
| } |
| |
| /* Put a character. */ |
| static void |
| pl2303_hw_put (struct grub_serial_port *port, const int c) |
| { |
| char cc = c; |
| |
| real_config (port); |
| |
| grub_usb_bulk_write (port->usbdev, port->out_endp, 1, &cc); |
| } |
| |
| static grub_err_t |
| pl2303_hw_configure (struct grub_serial_port *port, |
| struct grub_serial_config *config) |
| { |
| if (!is_speed_supported (config->speed)) |
| return grub_error (GRUB_ERR_BAD_ARGUMENT, |
| N_("unsupported serial port speed")); |
| |
| if (config->parity != GRUB_SERIAL_PARITY_NONE |
| && config->parity != GRUB_SERIAL_PARITY_ODD |
| && config->parity != GRUB_SERIAL_PARITY_EVEN) |
| return grub_error (GRUB_ERR_BAD_ARGUMENT, |
| N_("unsupported serial port parity")); |
| |
| if (config->stop_bits != GRUB_SERIAL_STOP_BITS_1 |
| && config->stop_bits != GRUB_SERIAL_STOP_BITS_1_5 |
| && config->stop_bits != GRUB_SERIAL_STOP_BITS_2) |
| return grub_error (GRUB_ERR_BAD_ARGUMENT, |
| N_("unsupported serial port stop bits number")); |
| |
| if (config->word_len < 5 || config->word_len > 8) |
| return grub_error (GRUB_ERR_BAD_ARGUMENT, |
| N_("unsupported serial port word length")); |
| |
| port->config = *config; |
| port->configured = 0; |
| |
| return GRUB_ERR_NONE; |
| } |
| |
| static struct grub_serial_driver grub_pl2303_driver = |
| { |
| .configure = pl2303_hw_configure, |
| .fetch = pl2303_hw_fetch, |
| .put = pl2303_hw_put, |
| .fini = grub_usbserial_fini |
| }; |
| |
| static const struct |
| { |
| grub_uint16_t vendor, product; |
| } products[] = |
| { |
| {0x067b, 0x2303} |
| }; |
| |
| static int |
| grub_pl2303_attach (grub_usb_device_t usbdev, int configno, int interfno) |
| { |
| unsigned j; |
| |
| for (j = 0; j < ARRAY_SIZE (products); j++) |
| if (usbdev->descdev.vendorid == products[j].vendor |
| && usbdev->descdev.prodid == products[j].product) |
| break; |
| if (j == ARRAY_SIZE (products)) |
| return 0; |
| |
| return grub_usbserial_attach (usbdev, configno, interfno, |
| &grub_pl2303_driver, |
| GRUB_USB_SERIAL_ENDPOINT_LAST_MATCHING, |
| GRUB_USB_SERIAL_ENDPOINT_LAST_MATCHING); |
| } |
| |
| static struct grub_usb_attach_desc attach_hook = |
| { |
| .class = 0xff, |
| .hook = grub_pl2303_attach |
| }; |
| |
| GRUB_MOD_INIT(usbserial_pl2303) |
| { |
| grub_usb_register_attach_hook_class (&attach_hook); |
| } |
| |
| GRUB_MOD_FINI(usbserial_pl2303) |
| { |
| grub_serial_unregister_driver (&grub_pl2303_driver); |
| grub_usb_unregister_attach_hook_class (&attach_hook); |
| } |