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luban-lite-t3e-pro/packages/third-party/cherryusb/class/vendor/cp201x/usbh_cp210x.c
刘可亮 7bbc029dae v1.0.0
2023-08-30 16:21:18 +08:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Silicon Laboratories CP210x USB to RS232 serial adaptor driver
*
* Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
*
* Support to set flow control line levels using TIOCMGET and TIOCMSET
* thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
* control thanks to Munir Nassar nassarmu@real-time.com
*
*/
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "usbh_cp210x.h"
#define u16 uint16_t
#define u32 uint32_t
#define u8 uint8_t
#ifndef container_of
#define container_of(p, t, m) \
((t *)((char *)p - (char *)(&(((t *)0)->m))))
#endif
#define dev_dbg(...) do {} while (0)
#define dev_err USB_LOG_ERR
#define dev_warn USB_LOG_WRN
#warning FIXME: le32_to_cpu
#define le32_to_cpu(le32_val) (le32_val)
#define le16_to_cpu(v) (v)
#define cpu_to_le32(v) (v)
#define USB_CTRL_SET_TIMEOUT 1
#define USB_CTRL_GET_TIMEOUT 1
#define TIOCSTI 0x5412
#define TIOCMGET 0x5415
#define TIOCMBIS 0x5416
#define TIOCMBIC 0x5417
#define TIOCMSET 0x5418
#define TIOCM_LE 0x001
#define TIOCM_DTR 0x002
#define TIOCM_RTS 0x004
#define TIOCM_ST 0x008
#define TIOCM_SR 0x010
#define TIOCM_CTS 0x020
#define TIOCM_CAR 0x040
#define TIOCM_RNG 0x080
#define TIOCM_DSR 0x100
#define TIOCM_CD TIOCM_CAR
#define TIOCM_RI TIOCM_RNG
#define TIOCM_OUT1 0x2000
#define TIOCM_OUT2 0x4000
#define TIOCM_LOOP 0x8000
/* c_cc characters */
#define VEOF 0
#define VEOL 1
#define VEOL2 2
#define VERASE 3
#define VWERASE 4
#define VKILL 5
#define VREPRINT 6
#define VSWTC 7
#define VINTR 8
#define VQUIT 9
#define VSUSP 10
#define VSTART 12
#define VSTOP 13
#define VLNEXT 14
#define VDISCARD 15
#define VMIN 16
#define VTIME 17
/* c_iflag bits */
#define IGNBRK 0000001
#define BRKINT 0000002
#define IGNPAR 0000004
#define PARMRK 0000010
#define INPCK 0000020
#define ISTRIP 0000040
#define INLCR 0000100
#define IGNCR 0000200
#define ICRNL 0000400
#define IXON 0001000
#define IXOFF 0002000
#define IXANY 0004000
#define IUCLC 0010000
#define IMAXBEL 0020000
#define IUTF8 0040000
/* c_oflag bits */
#define OPOST 0000001
#define ONLCR 0000002
#define OLCUC 0000004
#define OCRNL 0000010
#define ONOCR 0000020
#define ONLRET 0000040
#define OFILL 00000100
#define OFDEL 00000200
#define NLDLY 00001400
#define NL0 00000000
#define NL1 00000400
#define NL2 00001000
#define NL3 00001400
#define TABDLY 00006000
#define TAB0 00000000
#define TAB1 00002000
#define TAB2 00004000
#define TAB3 00006000
#define CRDLY 00030000
#define CR0 00000000
#define CR1 00010000
#define CR2 00020000
#define CR3 00030000
#define FFDLY 00040000
#define FF0 00000000
#define FF1 00040000
#define BSDLY 00100000
#define BS0 00000000
#define BS1 00100000
#define VTDLY 00200000
#define VT0 00000000
#define VT1 00200000
/*
* Should be equivalent to TAB3, see description of TAB3 in
* POSIX.1-2008, Ch. 11.2.3 "Output Modes"
*/
#define XTABS TAB3
/* c_cflag bit meaning */
#define CBAUD 0000037
#define B0 0000000 /* hang up */
#define B50 0000001
#define B75 0000002
#define B110 0000003
#define B134 0000004
#define B150 0000005
#define B200 0000006
#define B300 0000007
#define B600 0000010
#define B1200 0000011
#define B1800 0000012
#define B2400 0000013
#define B4800 0000014
#define B9600 0000015
#define B19200 0000016
#define B38400 0000017
#define EXTA B19200
#define EXTB B38400
#define CBAUDEX 0000000
#define B57600 00020
#define B115200 00021
#define B230400 00022
#define B460800 00023
#define B500000 00024
#define B576000 00025
#define B921600 00026
#define B1000000 00027
#define B1152000 00030
#define B1500000 00031
#define B2000000 00032
#define B2500000 00033
#define B3000000 00034
#define B3500000 00035
#define B4000000 00036
#define BOTHER 00037
#define CSIZE 00001400
#define CS5 00000000
#define CS6 00000400
#define CS7 00001000
#define CS8 00001400
#define CSTOPB 00002000
#define CREAD 00004000
#define PARENB 00010000
#define PARODD 00020000
#define HUPCL 00040000
#define CLOCAL 00100000
#define CMSPAR 010000000000 /* mark or space (stick) parity */
#define CRTSCTS 020000000000 /* flow control */
#define CIBAUD 07600000
#define IBSHIFT 16
/* c_lflag bits */
#define ISIG 0x00000080
#define ICANON 0x00000100
#define XCASE 0x00004000
#define ECHO 0x00000008
#define ECHOE 0x00000002
#define ECHOK 0x00000004
#define ECHONL 0x00000010
#define NOFLSH 0x80000000
#define TOSTOP 0x00400000
#define ECHOCTL 0x00000040
#define ECHOPRT 0x00000020
#define ECHOKE 0x00000001
#define FLUSHO 0x00800000
#define PENDIN 0x20000000
#define IEXTEN 0x00000400
#define EXTPROC 0x10000000
/* Values for the ACTION argument to `tcflow'. */
#define TCOOFF 0
#define TCOON 1
#define TCIOFF 2
#define TCION 3
/* Values for the QUEUE_SELECTOR argument to `tcflush'. */
#define TCIFLUSH 0
#define TCOFLUSH 1
#define TCIOFLUSH 2
/* Values for the OPTIONAL_ACTIONS argument to `tcsetattr'. */
#define TCSANOW 0
#define TCSADRAIN 1
#define TCSAFLUSH 2
/* c_cc characters */
#define VEOF 0
#define VEOL 1
#define VEOL2 2
#define VERASE 3
#define VWERASE 4
#define VKILL 5
#define VREPRINT 6
#define VSWTC 7
#define VINTR 8
#define VQUIT 9
#define VSUSP 10
#define VSTART 12
#define VSTOP 13
#define VLNEXT 14
#define VDISCARD 15
#define VMIN 16
#define VTIME 17
/* c_iflag bits */
#define IGNBRK 0000001
#define BRKINT 0000002
#define IGNPAR 0000004
#define PARMRK 0000010
#define INPCK 0000020
#define ISTRIP 0000040
#define INLCR 0000100
#define IGNCR 0000200
#define ICRNL 0000400
#define IXON 0001000
#define IXOFF 0002000
#define IXANY 0004000
#define IUCLC 0010000
#define IMAXBEL 0020000
#define IUTF8 0040000
/* c_oflag bits */
#define OPOST 0000001
#define ONLCR 0000002
#define OLCUC 0000004
#define OCRNL 0000010
#define ONOCR 0000020
#define ONLRET 0000040
#define OFILL 00000100
#define OFDEL 00000200
#define NLDLY 00001400
#define NL0 00000000
#define NL1 00000400
#define NL2 00001000
#define NL3 00001400
#define TABDLY 00006000
#define TAB0 00000000
#define TAB1 00002000
#define TAB2 00004000
#define TAB3 00006000
#define CRDLY 00030000
#define CR0 00000000
#define CR1 00010000
#define CR2 00020000
#define CR3 00030000
#define FFDLY 00040000
#define FF0 00000000
#define FF1 00040000
#define BSDLY 00100000
#define BS0 00000000
#define BS1 00100000
#define VTDLY 00200000
#define VT0 00000000
#define VT1 00200000
/*
* Should be equivalent to TAB3, see description of TAB3 in
* POSIX.1-2008, Ch. 11.2.3 "Output Modes"
*/
#define XTABS TAB3
/* c_cflag bit meaning */
#define CBAUD 0000037
#define B0 0000000 /* hang up */
#define B50 0000001
#define B75 0000002
#define B110 0000003
#define B134 0000004
#define B150 0000005
#define B200 0000006
#define B300 0000007
#define B600 0000010
#define B1200 0000011
#define B1800 0000012
#define B2400 0000013
#define B4800 0000014
#define B9600 0000015
#define B19200 0000016
#define B38400 0000017
#define EXTA B19200
#define EXTB B38400
#define CBAUDEX 0000000
#define B57600 00020
#define B115200 00021
#define B230400 00022
#define B460800 00023
#define B500000 00024
#define B576000 00025
#define B921600 00026
#define B1000000 00027
#define B1152000 00030
#define B1500000 00031
#define B2000000 00032
#define B2500000 00033
#define B3000000 00034
#define B3500000 00035
#define B4000000 00036
#define BOTHER 00037
#define CSIZE 00001400
#define CS5 00000000
#define CS6 00000400
#define CS7 00001000
#define CS8 00001400
#define CSTOPB 00002000
#define CREAD 00004000
#define PARENB 00010000
#define PARODD 00020000
#define HUPCL 00040000
#define CLOCAL 00100000
#define CMSPAR 010000000000 /* mark or space (stick) parity */
#define CRTSCTS 020000000000 /* flow control */
#define CIBAUD 07600000
#define IBSHIFT 16
/* c_lflag bits */
#define ISIG 0x00000080
#define ICANON 0x00000100
#define XCASE 0x00004000
#define ECHO 0x00000008
#define ECHOE 0x00000002
#define ECHOK 0x00000004
#define ECHONL 0x00000010
#define NOFLSH 0x80000000
#define TOSTOP 0x00400000
#define ECHOCTL 0x00000040
#define ECHOPRT 0x00000020
#define ECHOKE 0x00000001
#define FLUSHO 0x00800000
#define PENDIN 0x20000000
#define IEXTEN 0x00000400
#define EXTPROC 0x10000000
/* Values for the ACTION argument to `tcflow'. */
#define TCOOFF 0
#define TCOON 1
#define TCIOFF 2
#define TCION 3
/* Values for the QUEUE_SELECTOR argument to `tcflush'. */
#define TCIFLUSH 0
#define TCOFLUSH 1
#define TCIOFLUSH 2
/* Values for the OPTIONAL_ACTIONS argument to `tcsetattr'. */
#define TCSANOW 0
#define TCSADRAIN 1
#define TCSAFLUSH 2
/* c_cc characters */
#define VEOF 0
#define VEOL 1
#define VEOL2 2
#define VERASE 3
#define VWERASE 4
#define VKILL 5
#define VREPRINT 6
#define VSWTC 7
#define VINTR 8
#define VQUIT 9
#define VSUSP 10
#define VSTART 12
#define VSTOP 13
#define VLNEXT 14
#define VDISCARD 15
#define VMIN 16
#define VTIME 17
/* c_iflag bits */
#define IGNBRK 0000001
#define BRKINT 0000002
#define IGNPAR 0000004
#define PARMRK 0000010
#define INPCK 0000020
#define ISTRIP 0000040
#define INLCR 0000100
#define IGNCR 0000200
#define ICRNL 0000400
#define IXON 0001000
#define IXOFF 0002000
#define IXANY 0004000
#define IUCLC 0010000
#define IMAXBEL 0020000
#define IUTF8 0040000
/* c_oflag bits */
#define OPOST 0000001
#define ONLCR 0000002
#define OLCUC 0000004
#define OCRNL 0000010
#define ONOCR 0000020
#define ONLRET 0000040
#define OFILL 00000100
#define OFDEL 00000200
#define NLDLY 00001400
#define NL0 00000000
#define NL1 00000400
#define NL2 00001000
#define NL3 00001400
#define TABDLY 00006000
#define TAB0 00000000
#define TAB1 00002000
#define TAB2 00004000
#define TAB3 00006000
#define CRDLY 00030000
#define CR0 00000000
#define CR1 00010000
#define CR2 00020000
#define CR3 00030000
#define FFDLY 00040000
#define FF0 00000000
#define FF1 00040000
#define BSDLY 00100000
#define BS0 00000000
#define BS1 00100000
#define VTDLY 00200000
#define VT0 00000000
#define VT1 00200000
/*
* Should be equivalent to TAB3, see description of TAB3 in
* POSIX.1-2008, Ch. 11.2.3 "Output Modes"
*/
#define XTABS TAB3
/* c_cflag bit meaning */
#define CBAUD 0000037
#define B0 0000000 /* hang up */
#define B50 0000001
#define B75 0000002
#define B110 0000003
#define B134 0000004
#define B150 0000005
#define B200 0000006
#define B300 0000007
#define B600 0000010
#define B1200 0000011
#define B1800 0000012
#define B2400 0000013
#define B4800 0000014
#define B9600 0000015
#define B19200 0000016
#define B38400 0000017
#define EXTA B19200
#define EXTB B38400
#define CBAUDEX 0000000
#define B57600 00020
#define B115200 00021
#define B230400 00022
#define B460800 00023
#define B500000 00024
#define B576000 00025
#define B921600 00026
#define B1000000 00027
#define B1152000 00030
#define B1500000 00031
#define B2000000 00032
#define B2500000 00033
#define B3000000 00034
#define B3500000 00035
#define B4000000 00036
#define BOTHER 00037
#define CSIZE 00001400
#define CS5 00000000
#define CS6 00000400
#define CS7 00001000
#define CS8 00001400
#define CSTOPB 00002000
#define CREAD 00004000
#define PARENB 00010000
#define PARODD 00020000
#define HUPCL 00040000
#define CLOCAL 00100000
#define CMSPAR 010000000000 /* mark or space (stick) parity */
#define CRTSCTS 020000000000 /* flow control */
#define CIBAUD 07600000
#define IBSHIFT 16
/* c_lflag bits */
#define ISIG 0x00000080
#define ICANON 0x00000100
#define XCASE 0x00004000
#define ECHO 0x00000008
#define ECHOE 0x00000002
#define ECHOK 0x00000004
#define ECHONL 0x00000010
#define NOFLSH 0x80000000
#define TOSTOP 0x00400000
#define ECHOCTL 0x00000040
#define ECHOPRT 0x00000020
#define ECHOKE 0x00000001
#define FLUSHO 0x00800000
#define PENDIN 0x20000000
#define IEXTEN 0x00000400
#define EXTPROC 0x10000000
/* Values for the ACTION argument to `tcflow'. */
#define TCOOFF 0
#define TCOON 1
#define TCIOFF 2
#define TCION 3
/* Values for the QUEUE_SELECTOR argument to `tcflush'. */
#define TCIFLUSH 0
#define TCOFLUSH 1
#define TCIOFLUSH 2
/* Values for the OPTIONAL_ACTIONS argument to `tcsetattr'. */
#define TCSANOW 0
#define TCSADRAIN 1
#define TCSAFLUSH 2
#define __packed
#undef ARRAY_SIZE
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
#define clamp(val, lo, hi) min(max(val, lo), hi)
#define BITS_PER_LONG 32
#define GENMASK(h, l) \
(((~0UL) - (1UL << (l)) + 1) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
#define DIV_ROUND_CLOSEST(x, d) (((x) + ((d) / 2)) / (d))
#define true 1
#define false 0
static uint16_t swab16(uint16_t v)
{
return ((v & 0xff) << 8) | ((v & 0xff00) >> 8);
}
int usb_rcvctrlpipe(struct usb_serial_port *port, int useless)
{
return port->ctrlpipe_rx;
}
int usb_sndctrlpipe(struct usb_serial_port *port, int useless)
{
return port->ctrlpipe_tx;
}
void cp210x_get_termios(struct tty_struct *tty);
void cp210x_change_speed(struct tty_struct *tty);
void cp210x_get_termios(struct tty_struct *tty);
void cp210x_get_termios_port(struct usb_serial_port *port, tcflag_t *cflagp, unsigned int *baudp);
int usb_control_msg(struct usb_serial_port *port, int pipe, int req, u8 type, u16 val, u8 interface_num, void *dmabuf, int bufsize, int flags);
/* Config request types */
#define REQTYPE_HOST_TO_INTERFACE 0x41
#define REQTYPE_INTERFACE_TO_HOST 0xc1
#define REQTYPE_HOST_TO_DEVICE 0x40
#define REQTYPE_DEVICE_TO_HOST 0xc0
/* Config request codes */
#define CP210X_IFC_ENABLE 0x00
#define CP210X_SET_BAUDDIV 0x01
#define CP210X_GET_BAUDDIV 0x02
#define CP210X_SET_LINE_CTL 0x03
#define CP210X_GET_LINE_CTL 0x04
#define CP210X_SET_BREAK 0x05
#define CP210X_IMM_CHAR 0x06
#define CP210X_SET_MHS 0x07
#define CP210X_GET_MDMSTS 0x08
#define CP210X_SET_XON 0x09
#define CP210X_SET_XOFF 0x0A
#define CP210X_SET_EVENTMASK 0x0B
#define CP210X_GET_EVENTMASK 0x0C
#define CP210X_SET_CHAR 0x0D
#define CP210X_GET_CHARS 0x0E
#define CP210X_GET_PROPS 0x0F
#define CP210X_GET_COMM_STATUS 0x10
#define CP210X_RESET 0x11
#define CP210X_PURGE 0x12
#define CP210X_SET_FLOW 0x13
#define CP210X_GET_FLOW 0x14
#define CP210X_EMBED_EVENTS 0x15
#define CP210X_GET_EVENTSTATE 0x16
#define CP210X_SET_CHARS 0x19
#define CP210X_GET_BAUDRATE 0x1D
#define CP210X_SET_BAUDRATE 0x1E
#define CP210X_VENDOR_SPECIFIC 0xFF
/* CP210X_IFC_ENABLE */
#define UART_ENABLE 0x0001
#define UART_DISABLE 0x0000
/* CP210X_(SET|GET)_BAUDDIV */
#define BAUD_RATE_GEN_FREQ 0x384000
/* CP210X_(SET|GET)_LINE_CTL */
#define BITS_DATA_MASK 0X0f00
#define BITS_DATA_5 0X0500
#define BITS_DATA_6 0X0600
#define BITS_DATA_7 0X0700
#define BITS_DATA_8 0X0800
#define BITS_DATA_9 0X0900
#define BITS_PARITY_MASK 0x00f0
#define BITS_PARITY_NONE 0x0000
#define BITS_PARITY_ODD 0x0010
#define BITS_PARITY_EVEN 0x0020
#define BITS_PARITY_MARK 0x0030
#define BITS_PARITY_SPACE 0x0040
#define BITS_STOP_MASK 0x000f
#define BITS_STOP_1 0x0000
#define BITS_STOP_1_5 0x0001
#define BITS_STOP_2 0x0002
/* CP210X_SET_BREAK */
#define BREAK_ON 0x0001
#define BREAK_OFF 0x0000
/* CP210X_(SET_MHS|GET_MDMSTS) */
#define CONTROL_DTR 0x0001
#define CONTROL_RTS 0x0002
#define CONTROL_CTS 0x0010
#define CONTROL_DSR 0x0020
#define CONTROL_RING 0x0040
#define CONTROL_DCD 0x0080
#define CONTROL_WRITE_DTR 0x0100
#define CONTROL_WRITE_RTS 0x0200
/* CP210X_VENDOR_SPECIFIC values */
#define CP210X_READ_2NCONFIG 0x000E
#define CP210X_READ_LATCH 0x00C2
#define CP210X_GET_PARTNUM 0x370B
#define CP210X_GET_PORTCONFIG 0x370C
#define CP210X_GET_DEVICEMODE 0x3711
#define CP210X_WRITE_LATCH 0x37E1
/* Part number definitions */
#define CP210X_PARTNUM_CP2101 0x01
#define CP210X_PARTNUM_CP2102 0x02
#define CP210X_PARTNUM_CP2103 0x03
#define CP210X_PARTNUM_CP2104 0x04
#define CP210X_PARTNUM_CP2105 0x05
#define CP210X_PARTNUM_CP2108 0x08
#define CP210X_PARTNUM_CP2102N_QFN28 0x20
#define CP210X_PARTNUM_CP2102N_QFN24 0x21
#define CP210X_PARTNUM_CP2102N_QFN20 0x22
#define CP210X_PARTNUM_UNKNOWN 0xFF
#define __le32 int32_t
/* CP210X_GET_COMM_STATUS returns these 0x13 bytes */
struct cp210x_comm_status {
__le32 ulErrors;
__le32 ulHoldReasons;
__le32 ulAmountInInQueue;
__le32 ulAmountInOutQueue;
u8 bEofReceived;
u8 bWaitForImmediate;
u8 bReserved;
} __packed;
/*
* CP210X_PURGE - 16 bits passed in wValue of USB request.
* SiLabs app note AN571 gives a strange description of the 4 bits:
* bit 0 or bit 2 clears the transmit queue and 1 or 3 receive.
* writing 1 to all, however, purges cp2108 well enough to avoid the hang.
*/
#define PURGE_ALL 0x000f
/* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */
struct cp210x_flow_ctl {
__le32 ulControlHandshake;
__le32 ulFlowReplace;
__le32 ulXonLimit;
__le32 ulXoffLimit;
} __packed;
#undef BIT
#undef BIT_ULL
#undef BIT_MASK
#undef BIT_WORD
#undef BIT_ULL_MASK
#undef BITS_PER_BYTE
#define BIT(nr) (1UL << (nr))
#define BIT_ULL(nr) (1ULL << (nr))
#define BIT_MASK(nr) (1UL << ((nr) % BITS_PER_LONG))
#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
#define BIT_ULL_MASK(nr) (1ULL << ((nr) % BITS_PER_LONG_LONG))
#define BIT_ULL_WORD(nr) ((nr) / BITS_PER_LONG_LONG)
#define BITS_PER_BYTE 8
/* cp210x_flow_ctl::ulControlHandshake */
#define CP210X_SERIAL_DTR_MASK GENMASK(1, 0)
#define CP210X_SERIAL_DTR_SHIFT(_mode) (_mode)
#define CP210X_SERIAL_CTS_HANDSHAKE BIT(3)
#define CP210X_SERIAL_DSR_HANDSHAKE BIT(4)
#define CP210X_SERIAL_DCD_HANDSHAKE BIT(5)
#define CP210X_SERIAL_DSR_SENSITIVITY BIT(6)
/* values for cp210x_flow_ctl::ulControlHandshake::CP210X_SERIAL_DTR_MASK */
#define CP210X_SERIAL_DTR_INACTIVE 0
#define CP210X_SERIAL_DTR_ACTIVE 1
#define CP210X_SERIAL_DTR_FLOW_CTL 2
/* cp210x_flow_ctl::ulFlowReplace */
#define CP210X_SERIAL_AUTO_TRANSMIT BIT(0)
#define CP210X_SERIAL_AUTO_RECEIVE BIT(1)
#define CP210X_SERIAL_ERROR_CHAR BIT(2)
#define CP210X_SERIAL_NULL_STRIPPING BIT(3)
#define CP210X_SERIAL_BREAK_CHAR BIT(4)
#define CP210X_SERIAL_RTS_MASK GENMASK(7, 6)
#define CP210X_SERIAL_RTS_SHIFT(_mode) (_mode << 6)
#define CP210X_SERIAL_XOFF_CONTINUE BIT(31)
/* values for cp210x_flow_ctl::ulFlowReplace::CP210X_SERIAL_RTS_MASK */
#define CP210X_SERIAL_RTS_INACTIVE 0
#define CP210X_SERIAL_RTS_ACTIVE 1
#define CP210X_SERIAL_RTS_FLOW_CTL 2
/* CP210X_VENDOR_SPECIFIC, CP210X_GET_DEVICEMODE call reads these 0x2 bytes. */
struct cp210x_pin_mode {
u8 eci;
u8 sci;
} __packed;
#define CP210X_PIN_MODE_MODEM 0
#define CP210X_PIN_MODE_GPIO BIT(0)
/*
* CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xf bytes.
* Structure needs padding due to unused/unspecified bytes.
*/
#define __le16 int16_t
struct cp210x_config {
__le16 gpio_mode;
u8 __pad0[2];
__le16 reset_state;
u8 __pad1[4];
__le16 suspend_state;
u8 sci_cfg;
u8 eci_cfg;
u8 device_cfg;
} __packed;
/* GPIO modes */
#define CP210X_SCI_GPIO_MODE_OFFSET 9
#define CP210X_SCI_GPIO_MODE_MASK GENMASK(11, 9)
#define CP210X_ECI_GPIO_MODE_OFFSET 2
#define CP210X_ECI_GPIO_MODE_MASK GENMASK(3, 2)
/* CP2105 port configuration values */
#define CP2105_GPIO0_TXLED_MODE BIT(0)
#define CP2105_GPIO1_RXLED_MODE BIT(1)
#define CP2105_GPIO1_RS485_MODE BIT(2)
/* CP2102N configuration array indices */
#define CP210X_2NCONFIG_CONFIG_VERSION_IDX 2
#define CP210X_2NCONFIG_GPIO_MODE_IDX 581
#define CP210X_2NCONFIG_GPIO_RSTLATCH_IDX 587
#define CP210X_2NCONFIG_GPIO_CONTROL_IDX 600
/* CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x2 bytes. */
struct cp210x_gpio_write {
u8 mask;
u8 state;
} __packed;
/*
* Helper to get interface number when we only have struct usb_serial.
*/
static u8 cp210x_interface_num(struct usb_serial_port *port)
{
return port->bInterfaceNumber;
}
/*
* Reads a variable-sized block of CP210X_ registers, identified by req.
* Returns data into buf in native USB byte order.
*/
static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req,
void *buf, int bufsize)
{
int result;
result = usb_control_msg(port, usb_rcvctrlpipe(port, 0),
req, REQTYPE_INTERFACE_TO_HOST, 0,
port->bInterfaceNumber, buf, bufsize,
USB_CTRL_SET_TIMEOUT);
if (result == bufsize) {
result = 0;
} else {
dev_err("failed get req 0x%x size %d status: %d\n",
(uint8_t)req, bufsize, result);
if (result >= 0)
result = -EIO;
/*
* FIXME Some callers don't bother to check for error,
* at least give them consistent junk until they are fixed
*/
memset(buf, 0, bufsize);
}
return result;
}
/*
* Reads any 32-bit CP210X_ register identified by req.
*/
static int cp210x_read_u32_reg(struct usb_serial_port *port, u8 req, u32 *val)
{
__le32 le32_val;
int err;
err = cp210x_read_reg_block(port, req, &le32_val, sizeof(le32_val));
if (err) {
/*
* FIXME Some callers don't bother to check for error,
* at least give them consistent junk until they are fixed
*/
*val = 0;
return err;
}
*val = le32_to_cpu(le32_val);
return 0;
}
/*
* Reads any 16-bit CP210X_ register identified by req.
*/
static int cp210x_read_u16_reg(struct usb_serial_port *port, u8 req, u16 *val)
{
__le16 le16_val;
int err;
err = cp210x_read_reg_block(port, req, &le16_val, sizeof(le16_val));
if (err)
return err;
*val = le16_to_cpu(le16_val);
return 0;
}
/*
* Reads any 8-bit CP210X_ register identified by req.
*/
static int cp210x_read_u8_reg(struct usb_serial_port *port, u8 req, u8 *val)
{
return cp210x_read_reg_block(port, req, val, sizeof(*val));
}
/*
* Reads a variable-sized vendor block of CP210X_ registers, identified by val.
* Returns data into buf in native USB byte order.
*/
static int cp210x_read_vendor_block(struct usb_serial_port *port, u8 type, u16 val,
void *buf, int bufsize)
{
int result;
result = usb_control_msg(port, usb_rcvctrlpipe(port, 0),
CP210X_VENDOR_SPECIFIC, type, val,
cp210x_interface_num(port), buf, bufsize,
USB_CTRL_GET_TIMEOUT);
if (result == bufsize) {
return 0;
} else {
if (result >= 0)
return -1;
}
return -2;
}
/*
* Writes any 16-bit CP210X_ register (req) whose value is passed
* entirely in the wValue field of the USB request.
*/
static int cp210x_write_u16_reg(struct usb_serial_port *port, u8 req, u16 val)
{
int result;
result = usb_control_msg(port, usb_sndctrlpipe(port, 0),
req, REQTYPE_HOST_TO_INTERFACE, val,
port->bInterfaceNumber, NULL, 0,
USB_CTRL_SET_TIMEOUT);
if (result < 0) {
USB_LOG_ERR("failed set request 0x%x status: %d\n",
req, result);
}
return result;
}
/*
* Writes a variable-sized block of CP210X_ registers, identified by req.
* Data in buf must be in native USB byte order.
*/
static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req,
void *buf, int bufsize)
{
int result;
result = usb_control_msg(port, usb_sndctrlpipe(port, 0),
req, REQTYPE_HOST_TO_INTERFACE, 0,
port->bInterfaceNumber, buf, bufsize,
USB_CTRL_SET_TIMEOUT);
if (result == bufsize) {
result = 0;
} else {
USB_LOG_ERR("failed set req 0x%x size %d status: %d\n",
req, bufsize, result);
if (result >= 0)
result = -EIO;
}
return result;
}
/*
* Writes any 32-bit CP210X_ register identified by req.
*/
static int cp210x_write_u32_reg(struct usb_serial_port *port, u8 req, u32 val)
{
__le32 le32_val;
le32_val = cpu_to_le32(val);
return cp210x_write_reg_block(port, req, &le32_val, sizeof(le32_val));
}
/*
* Detect CP2108 GET_LINE_CTL bug and activate workaround.
* Write a known good value 0x800, read it back.
* If it comes back swapped the bug is detected.
* Preserve the original register value.
*/
static int cp210x_detect_swapped_line_ctl(struct usb_serial_port *port)
{
u16 line_ctl_save;
u16 line_ctl_test;
int err;
err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_save);
if (err) {
USB_LOG_ERR("Error, read reg GET_LINE_CTL\n");
return err;
}
err = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, 0x800);
if (err) {
USB_LOG_ERR("Error, write reg SET_LINE_CTL\n");
return err;
}
err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_test);
if (err) {
USB_LOG_ERR("Error, read reg GET_LINE_CTL\n");
return err;
}
if (line_ctl_test == 8) {
port->has_swapped_line_ctl = true;
line_ctl_save = swab16(line_ctl_save);
}
return cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, line_ctl_save);
}
/*
* Must always be called instead of cp210x_read_u16_reg(CP210X_GET_LINE_CTL)
* to workaround cp2108 bug and get correct value.
*/
static int cp210x_get_line_ctl(struct usb_serial_port *port, u16 *ctl)
{
int err;
err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, ctl);
if (err)
return err;
/* Workaround swapped bytes in 16-bit value from CP210X_GET_LINE_CTL */
if (port->has_swapped_line_ctl)
*ctl = swab16(*ctl);
return 0;
}
int cp210x_open(struct tty_struct *tty)
{
int result;
struct usb_serial_port *port = &tty->driver_data;
result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE);
if (result) {
USB_LOG_ERR("%s - Unable to enable UART\n", __func__);
return result;
}
/* Configure the termios structure */
cp210x_get_termios(tty);
/* The baud rate must be initialised on cp2104 */
if (tty)
cp210x_change_speed(tty);
return 0;
}
void cp210x_close(struct usb_serial_port *port)
{
/* Clear both queues; cp2108 needs this to avoid an occasional hang */
cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL);
cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
}
/*
* Read how many bytes are waiting in the TX queue.
*/
static int cp210x_get_tx_queue_byte_count(struct usb_serial_port *port,
u32 *count)
{
struct cp210x_comm_status sts;
int result;
result = usb_control_msg(port, usb_rcvctrlpipe(port, 0),
CP210X_GET_COMM_STATUS, REQTYPE_INTERFACE_TO_HOST,
0, port->bInterfaceNumber, &sts, sizeof(sts),
USB_CTRL_GET_TIMEOUT);
if (result == sizeof(sts)) {
*count = le32_to_cpu(sts.ulAmountInOutQueue);
result = 0;
} else {
dev_err("failed to get comm status: %d\n", result);
if (result >= 0)
result = -EIO;
}
return result;
}
bool cp210x_tx_empty(struct usb_serial_port *port)
{
int err;
u32 count;
err = cp210x_get_tx_queue_byte_count(port, &count);
if (err)
return true;
return !count;
}
/*
* cp210x_get_termios
* Reads the baud rate, data bits, parity, stop bits and flow control mode
* from the device, corrects any unsupported values, and configures the
* termios structure to reflect the state of the device
*/
void cp210x_get_termios(struct tty_struct *tty)
{
unsigned int baud;
struct usb_serial_port *port = &tty->driver_data;
if (tty) {
cp210x_get_termios_port(&tty->driver_data,
&tty->termios.c_cflag, &baud);
} else {
tcflag_t cflag;
cflag = 0;
cp210x_get_termios_port(port, &cflag, &baud);
}
}
/*
* cp210x_get_termios_port
* This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
*/
void cp210x_get_termios_port(struct usb_serial_port *port, tcflag_t *cflagp, unsigned int *baudp)
{
tcflag_t cflag;
struct cp210x_flow_ctl flow_ctl;
u32 baud;
u16 bits;
u32 ctl_hs;
cp210x_read_u32_reg(port, CP210X_GET_BAUDRATE, &baud);
dev_dbg("%s - baud rate = %d\n", __func__, baud);
*baudp = baud;
cflag = *cflagp;
cp210x_get_line_ctl(port, &bits);
cflag &= ~CSIZE;
switch (bits & BITS_DATA_MASK) {
case BITS_DATA_5:
dev_dbg("%s - data bits = 5\n", __func__);
cflag |= CS5;
break;
case BITS_DATA_6:
dev_dbg("%s - data bits = 6\n", __func__);
cflag |= CS6;
break;
case BITS_DATA_7:
dev_dbg("%s - data bits = 7\n", __func__);
cflag |= CS7;
break;
case BITS_DATA_8:
dev_dbg("%s - data bits = 8\n", __func__);
cflag |= CS8;
break;
case BITS_DATA_9:
dev_dbg("%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
cflag |= CS8;
bits &= ~BITS_DATA_MASK;
bits |= BITS_DATA_8;
cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
break;
default:
dev_dbg("%s - Unknown number of data bits, using 8\n", __func__);
cflag |= CS8;
bits &= ~BITS_DATA_MASK;
bits |= BITS_DATA_8;
cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
break;
}
switch (bits & BITS_PARITY_MASK) {
case BITS_PARITY_NONE:
dev_dbg("%s - parity = NONE\n", __func__);
cflag &= ~PARENB;
break;
case BITS_PARITY_ODD:
dev_dbg("%s - parity = ODD\n", __func__);
cflag |= (PARENB | PARODD);
break;
case BITS_PARITY_EVEN:
dev_dbg("%s - parity = EVEN\n", __func__);
cflag &= ~PARODD;
cflag |= PARENB;
break;
case BITS_PARITY_MARK:
dev_dbg("%s - parity = MARK\n", __func__);
cflag |= (PARENB | PARODD | CMSPAR);
break;
case BITS_PARITY_SPACE:
dev_dbg("%s - parity = SPACE\n", __func__);
cflag &= ~PARODD;
cflag |= (PARENB | CMSPAR);
break;
default:
dev_dbg("%s - Unknown parity mode, disabling parity\n", __func__);
cflag &= ~PARENB;
bits &= ~BITS_PARITY_MASK;
cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
break;
}
cflag &= ~CSTOPB;
switch (bits & BITS_STOP_MASK) {
case BITS_STOP_1:
dev_dbg("%s - stop bits = 1\n", __func__);
break;
case BITS_STOP_1_5:
dev_dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
bits &= ~BITS_STOP_MASK;
cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
break;
case BITS_STOP_2:
dev_dbg("%s - stop bits = 2\n", __func__);
cflag |= CSTOPB;
break;
default:
dev_dbg("%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
bits &= ~BITS_STOP_MASK;
cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
break;
}
cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
sizeof(flow_ctl));
ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
if (ctl_hs & CP210X_SERIAL_CTS_HANDSHAKE) {
dev_dbg("%s - flow control = CRTSCTS\n", __func__);
cflag |= CRTSCTS;
} else {
dev_dbg("%s - flow control = NONE\n", __func__);
cflag &= ~CRTSCTS;
}
*cflagp = cflag;
}
struct cp210x_rate {
speed_t rate;
speed_t high;
};
static const struct cp210x_rate cp210x_an205_table1[] = {
{ 300, 300 },
{ 600, 600 },
{ 1200, 1200 },
{ 1800, 1800 },
{ 2400, 2400 },
{ 4000, 4000 },
{ 4800, 4803 },
{ 7200, 7207 },
{ 9600, 9612 },
{ 14400, 14428 },
{ 16000, 16062 },
{ 19200, 19250 },
{ 28800, 28912 },
{ 38400, 38601 },
{ 51200, 51558 },
{ 56000, 56280 },
{ 57600, 58053 },
{ 64000, 64111 },
{ 76800, 77608 },
{ 115200, 117028 },
{ 128000, 129347 },
{ 153600, 156868 },
{ 230400, 237832 },
{ 250000, 254234 },
{ 256000, 273066 },
{ 460800, 491520 },
{ 500000, 567138 },
{ 576000, 670254 },
{ 921600, UINT_MAX }
};
/*
* Quantises the baud rate as per AN205 Table 1
*/
static speed_t cp210x_get_an205_rate(speed_t baud)
{
int i;
for (i = 0; i < ARRAY_SIZE(cp210x_an205_table1); ++i) {
if (baud <= cp210x_an205_table1[i].high)
break;
}
return cp210x_an205_table1[i].rate;
}
static speed_t cp210x_get_actual_rate(struct usb_serial_port *port, speed_t baud)
{
unsigned int prescale = 1;
unsigned int div;
baud = clamp(baud, 300u, port->max_speed);
if (baud <= 365)
prescale = 4;
div = DIV_ROUND_CLOSEST(48000000, 2 * prescale * baud);
baud = 48000000 / (2 * prescale * div);
return baud;
}
/*
* CP2101 supports the following baud rates:
*
* 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
* 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
*
* CP2102 and CP2103 support the following additional rates:
*
* 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
* 576000
*
* The device will map a requested rate to a supported one, but the result
* of requests for rates greater than 1053257 is undefined (see AN205).
*
* CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
* respectively, with an error less than 1%. The actual rates are determined
* by
*
* div = round(freq / (2 x prescale x request))
* actual = freq / (2 x prescale x div)
*
* For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
* or 1 otherwise.
* For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
* otherwise.
*/
void cp210x_change_speed(struct tty_struct *tty)
{
struct usb_serial_port *port = &tty->driver_data;
u32 baud;
baud = tty->termios.c_ospeed;
/*
* This maps the requested rate to the actual rate, a valid rate on
* cp2102 or cp2103, or to an arbitrary rate in [1M, max_speed].
*
* NOTE: B0 is not implemented.
*/
if (port->use_actual_rate)
baud = cp210x_get_actual_rate(port, baud);
else if (baud < 1000000)
baud = cp210x_get_an205_rate(baud);
else if (baud > port->max_speed)
baud = port->max_speed;
dev_dbg("%s - setting baud rate to %u\n", __func__, baud);
if (cp210x_write_u32_reg(port, CP210X_SET_BAUDRATE, baud)) {
dev_warn("failed to set baud rate to %u\n", baud);
baud = 9600;
}
}
void cp210x_set_termios(struct tty_struct *tty)
{
unsigned int cflag;
u16 bits;
struct usb_serial_port *port = &tty->driver_data;
cflag = tty->termios.c_cflag;
cp210x_change_speed(tty);
/* If the number of data bits is to be updated */
cp210x_get_line_ctl(port, &bits);
bits &= ~BITS_DATA_MASK;
switch (cflag & CSIZE) {
case CS5:
bits |= BITS_DATA_5;
dev_dbg("%s - data bits = 5\n", __func__);
break;
case CS6:
bits |= BITS_DATA_6;
dev_dbg("%s - data bits = 6\n", __func__);
break;
case CS7:
bits |= BITS_DATA_7;
dev_dbg("%s - data bits = 7\n", __func__);
break;
case CS8:
default:
bits |= BITS_DATA_8;
dev_dbg("%s - data bits = 8\n", __func__);
break;
}
if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
dev_dbg("Number of data bits requested not supported by device%s\n", "");
cp210x_get_line_ctl(port, &bits);
bits &= ~BITS_PARITY_MASK;
if (cflag & PARENB) {
if (cflag & CMSPAR) {
if (cflag & PARODD) {
bits |= BITS_PARITY_MARK;
dev_dbg("%s - parity = MARK\n", __func__);
} else {
bits |= BITS_PARITY_SPACE;
dev_dbg(, "%s - parity = SPACE\n", __func__);
}
} else {
if (cflag & PARODD) {
bits |= BITS_PARITY_ODD;
dev_dbg("%s - parity = ODD\n", __func__);
} else {
bits |= BITS_PARITY_EVEN;
dev_dbg("%s - parity = EVEN\n", __func__);
}
}
}
if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
dev_dbg("Parity mode not supported by device%s\n", "");
cp210x_get_line_ctl(port, &bits);
bits &= ~BITS_STOP_MASK;
if (cflag & CSTOPB) {
bits |= BITS_STOP_2;
dev_dbg("%s - stop bits = 2\n", __func__);
} else {
bits |= BITS_STOP_1;
dev_dbg("%s - stop bits = 1\n", __func__);
}
if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
dev_dbg("Number of stop bits requested not supported by device%s\n", "");
{
struct cp210x_flow_ctl flow_ctl;
u32 ctl_hs;
u32 flow_repl;
cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
sizeof(flow_ctl));
ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace);
dev_dbg("%s - read ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
__func__, ctl_hs, flow_repl);
ctl_hs &= ~CP210X_SERIAL_DSR_HANDSHAKE;
ctl_hs &= ~CP210X_SERIAL_DCD_HANDSHAKE;
ctl_hs &= ~CP210X_SERIAL_DSR_SENSITIVITY;
ctl_hs &= ~CP210X_SERIAL_DTR_MASK;
ctl_hs |= CP210X_SERIAL_DTR_SHIFT(CP210X_SERIAL_DTR_ACTIVE);
if (cflag & CRTSCTS) {
ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE;
flow_repl &= ~CP210X_SERIAL_RTS_MASK;
flow_repl |= CP210X_SERIAL_RTS_SHIFT(
CP210X_SERIAL_RTS_FLOW_CTL);
dev_dbg("%s - flow control = CRTSCTS\n", __func__);
} else {
ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE;
flow_repl &= ~CP210X_SERIAL_RTS_MASK;
flow_repl |= CP210X_SERIAL_RTS_SHIFT(
CP210X_SERIAL_RTS_ACTIVE);
dev_dbg("%s - flow control = NONE\n", __func__);
}
dev_dbg("%s - write ulControlHandshake=0x%08x, ulFlowReplace=0x%08x\n",
__func__, ctl_hs, flow_repl);
flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs);
flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl);
cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl,
sizeof(flow_ctl));
}
}
int cp210x_tiocmset_port(struct usb_serial_port *port, unsigned int set, unsigned int clear);
int cp210x_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear)
{
struct usb_serial_port *port = 0;
return cp210x_tiocmset_port(port, set, clear);
}
int cp210x_tiocmset_port(struct usb_serial_port *port, unsigned int set, unsigned int clear)
{
u16 control = 0;
if (set & TIOCM_RTS) {
control |= CONTROL_RTS;
control |= CONTROL_WRITE_RTS;
}
if (set & TIOCM_DTR) {
control |= CONTROL_DTR;
control |= CONTROL_WRITE_DTR;
}
if (clear & TIOCM_RTS) {
control &= ~CONTROL_RTS;
control |= CONTROL_WRITE_RTS;
}
if (clear & TIOCM_DTR) {
control &= ~CONTROL_DTR;
control |= CONTROL_WRITE_DTR;
}
return cp210x_write_u16_reg(port, CP210X_SET_MHS, control);
}
void cp210x_dtr_rts(struct usb_serial_port *p, int on)
{
if (on)
cp210x_tiocmset_port(p, TIOCM_DTR | TIOCM_RTS, 0);
else
cp210x_tiocmset_port(p, 0, TIOCM_DTR | TIOCM_RTS);
}
int cp210x_tiocmget(struct tty_struct *tty)
{
struct usb_serial_port *port = &tty->driver_data;
u8 control;
int result;
result = cp210x_read_u8_reg(port, CP210X_GET_MDMSTS, &control);
if (result)
return result;
result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0) | ((control & CONTROL_RTS) ? TIOCM_RTS : 0) | ((control & CONTROL_CTS) ? TIOCM_CTS : 0) | ((control & CONTROL_DSR) ? TIOCM_DSR : 0) | ((control & CONTROL_RING) ? TIOCM_RI : 0) | ((control & CONTROL_DCD) ? TIOCM_CD : 0);
dev_dbg("%s - control = 0x%.2x\n", __func__, control);
return result;
}
void cp210x_break_ctl(struct tty_struct *tty, int break_state)
{
struct usb_serial_port *port = &tty->driver_data;
u16 state;
if (break_state == 0)
state = BREAK_OFF;
else
state = BREAK_ON;
dev_dbg("%s - turning break %s\n", __func__,
state == BREAK_OFF ? "off" : "on");
cp210x_write_u16_reg(port, CP210X_SET_BREAK, state);
}
int cp210x_port_probe(struct usb_serial_port *port)
{
int ret;
ret = cp210x_detect_swapped_line_ctl(port);
if (ret) {
return ret;
}
return 0;
}
void cp210x_init_max_speed(struct usb_serial_port *port)
{
bool use_actual_rate = false;
speed_t max;
switch (port->partnum) {
case CP210X_PARTNUM_CP2101:
max = 921600;
break;
case CP210X_PARTNUM_CP2102:
case CP210X_PARTNUM_CP2103:
//max = 1000000;
max = 9600;
break;
case CP210X_PARTNUM_CP2104:
use_actual_rate = true;
max = 2000000;
break;
case CP210X_PARTNUM_CP2108:
max = 2000000;
break;
case CP210X_PARTNUM_CP2105:
if (cp210x_interface_num(port) == 0) {
use_actual_rate = true;
max = 2000000; /* ECI */
} else {
max = 921600; /* SCI */
}
break;
case CP210X_PARTNUM_CP2102N_QFN28:
case CP210X_PARTNUM_CP2102N_QFN24:
case CP210X_PARTNUM_CP2102N_QFN20:
use_actual_rate = true;
max = 3000000;
break;
default:
max = 2000000;
break;
}
max = 9600;
port->max_speed = max;
port->use_actual_rate = use_actual_rate;
dev_dbg("max_speed=%d\n", max);
dev_dbg("use_actual_rate=%d\n", use_actual_rate);
}
int cp210x_attach(struct usb_serial_port *port)
{
int result;
port->partnum = CP210X_PARTNUM_UNKNOWN;
result = cp210x_read_vendor_block(port, REQTYPE_DEVICE_TO_HOST,
CP210X_GET_PARTNUM, &port->partnum,
sizeof(port->partnum));
if (result < 0) {
dev_warn(
"querying part number failed%s\n", "");
port->partnum = CP210X_PARTNUM_UNKNOWN;
}
switch (port->partnum) {
case CP210X_PARTNUM_CP2101:
case CP210X_PARTNUM_CP2102:
case CP210X_PARTNUM_CP2103:
case CP210X_PARTNUM_CP2104:
case CP210X_PARTNUM_CP2108:
case CP210X_PARTNUM_CP2105:
case CP210X_PARTNUM_CP2102N_QFN28:
case CP210X_PARTNUM_CP2102N_QFN24:
case CP210X_PARTNUM_CP2102N_QFN20:
cp210x_init_max_speed(port);
return 0;
default:
return -1;
}
}
int usb_control_msg(struct usb_serial_port *port, int pipe, int req, u8 type, u16 val, u8 interface_num, void *dmabuf, int bufsize, int flags)
{
struct usbh_cp210x *p_device = container_of(port, struct usbh_cp210x, drv_data.driver_data);
struct usb_setup_packet *setup = p_device->hport->setup;
setup->bmRequestType = type;
setup->bRequest = req;
setup->wValue = val;
setup->wIndex = interface_num;
setup->wLength = bufsize;
int len = usbh_control_transfer(p_device->hport->ep0, setup, dmabuf);
if (len > 0) {
return len - 8;
}
return len;
}
static int __usbh_cp210x_connect(struct usbh_hubport *hport, uint8_t intf)
{
struct usb_endpoint_descriptor *ep_desc;
struct usbh_cp210x *p_cp210x = usb_malloc(sizeof(struct usbh_cp210x));
if (0 == p_cp210x) {
return -ENOSYS;
}
memset(p_cp210x, 0x00, sizeof(*p_cp210x));
p_cp210x->hport = hport;
p_cp210x->intf = intf;
p_cp210x->index = hport->port - 1;
hport->config.intf[intf].priv = p_cp210x;
p_cp210x->drv_data.driver_data.bInterfaceNumber = 1;
p_cp210x->drv_data.driver_data.ctrlpipe_rx = 0x80;
p_cp210x->drv_data.driver_data.ctrlpipe_tx = 0x00;
p_cp210x->drv_data.driver_data.max_speed = 9600;
p_cp210x->drv_data.driver_data.use_actual_rate = 1;
p_cp210x->drv_data.driver_data.bInterfaceNumber = 1;
p_cp210x->drv_data.driver_data.has_swapped_line_ctl = 0;
USB_LOG_INFO("%s hub %d port %d\n", "---- attach ----", hport->parent->index, hport->port);
if (0 != cp210x_attach(&p_cp210x->drv_data.driver_data)) {
USB_LOG_INFO("%s\n", "Device NOT supported!");
return -EIO;
}
cp210x_port_probe(&p_cp210x->drv_data.driver_data);
cp210x_open(&p_cp210x->drv_data);
cp210x_break_ctl(&p_cp210x->drv_data, 0);
memset(&p_cp210x->drv_data.termios, 0, sizeof(p_cp210x->drv_data.termios));
p_cp210x->drv_data.termios.c_iflag = 0;
p_cp210x->drv_data.termios.c_oflag = 0;
p_cp210x->drv_data.termios.c_cflag = CS8;
p_cp210x->drv_data.termios.c_lflag = 0;
p_cp210x->drv_data.termios.c_cc[0] = 0;
p_cp210x->drv_data.termios.c_ospeed = 9600;
cp210x_set_termios(&p_cp210x->drv_data);
for (uint8_t i = 0; i < hport->config.intf[intf].altsetting[0].intf_desc.bNumEndpoints; i++) {
ep_desc = &hport->config.intf[intf].altsetting[0].ep[i].ep_desc;
if (ep_desc->bEndpointAddress & 0x80) {
usbh_hport_activate_epx(&p_cp210x->bulkin, hport, ep_desc);
} else {
usbh_hport_activate_epx(&p_cp210x->bulkout, hport, ep_desc);
}
}
drv_usbh_cp210x_run(p_cp210x);
return 0;
}
__WEAK void drv_usbh_cp210x_run(struct usbh_cp210x *p_device)
{
}
__WEAK void drv_usbh_cp210x_stop(struct usbh_cp210x *p_device)
{
}
static int __usbh_cp210x_disconnect(struct usbh_hubport *hport, uint8_t intf)
{
struct usbh_cp210x *p_device = (struct usbh_cp210x *)hport->config.intf[intf].priv;
if (p_device) {
drv_usbh_cp210x_stop(p_device);
if (p_device->bulkin) {
usbh_pipe_free(p_device->bulkin);
}
if (p_device->bulkout) {
usbh_pipe_free(p_device->bulkout);
}
memset(p_device, 0, sizeof(*p_device));
usb_free(p_device);
}
return 0;
}
static const struct usbh_class_driver cp210x_class_driver = {
.driver_name = "cp210x",
.connect = __usbh_cp210x_connect,
.disconnect = __usbh_cp210x_disconnect
};
CLASS_INFO_DEFINE const struct usbh_class_info cp210x_class_info = {
.match_flags = USB_CLASS_MATCH_INTF_CLASS | USB_CLASS_MATCH_INTF_SUBCLASS | USB_CLASS_MATCH_INTF_PROTOCOL,
.class = 0xff, // usbh_cp210x_static_device_CLASS_MASS_STORAGE,
.subclass = 0x00, //MSC_SUBCLASS_SCSI,
.protocol = 0x00, //MSC_PROTOCOL_BULK_ONLY,
.vid = 0x00,
.pid = 0x00,
.class_driver = &cp210x_class_driver
};
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