dev-serial: add support for setting data_bits in QEMUSerialSetParams
Also implement the behaviour reported in Linux's ftdi_sio.c whereby if an invalid data_bits value is provided then the hardware defaults to using 8. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20201027150456.24606-8-mark.cave-ayland@ilande.co.uk Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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@ -308,6 +308,23 @@ static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
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break;
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break;
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}
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}
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case VendorDeviceOutRequest | FTDI_SET_DATA:
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case VendorDeviceOutRequest | FTDI_SET_DATA:
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switch (value & 0xff) {
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case 7:
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s->params.data_bits = 7;
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break;
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case 8:
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s->params.data_bits = 8;
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break;
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default:
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/*
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* According to a comment in Linux's ftdi_sio.c original FTDI
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* chips fall back to 8 data bits for unsupported data_bits
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*/
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trace_usb_serial_unsupported_data_bits(bus->busnr, dev->addr,
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value & 0xff);
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s->params.data_bits = 8;
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}
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switch (value & FTDI_PARITY) {
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switch (value & FTDI_PARITY) {
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case 0:
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case 0:
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s->params.parity = 'N';
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s->params.parity = 'N';
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@ -327,6 +327,7 @@ usb_serial_handle_control(int bus, int addr, int request, int value) "dev %d:%u
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usb_serial_unsupported_parity(int bus, int addr, int value) "dev %d:%u unsupported parity %d"
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usb_serial_unsupported_parity(int bus, int addr, int value) "dev %d:%u unsupported parity %d"
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usb_serial_unsupported_stopbits(int bus, int addr, int value) "dev %d:%u unsupported stop bits %d"
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usb_serial_unsupported_stopbits(int bus, int addr, int value) "dev %d:%u unsupported stop bits %d"
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usb_serial_unsupported_control(int bus, int addr, int request, int value) "dev %d:%u got unsupported/bogus control 0x%x, value 0x%x"
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usb_serial_unsupported_control(int bus, int addr, int request, int value) "dev %d:%u got unsupported/bogus control 0x%x, value 0x%x"
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usb_serial_unsupported_data_bits(int bus, int addr, int value) "dev %d:%u unsupported data bits %d, falling back to 8"
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usb_serial_bad_token(int bus, int addr) "dev %d:%u bad token"
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usb_serial_bad_token(int bus, int addr) "dev %d:%u bad token"
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usb_serial_set_baud(int bus, int addr, int baud) "dev %d:%u baud rate %d"
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usb_serial_set_baud(int bus, int addr, int baud) "dev %d:%u baud rate %d"
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usb_serial_set_data(int bus, int addr, int parity, int data, int stop) "dev %d:%u parity %c, data bits %d, stop bits %d"
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usb_serial_set_data(int bus, int addr, int parity, int data, int stop) "dev %d:%u parity %c, data bits %d, stop bits %d"
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