summaryrefslogtreecommitdiff
path: root/drivers/usb/serial/cp210x.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/serial/cp210x.c')
-rw-r--r--drivers/usb/serial/cp210x.c1500
1 files changed, 947 insertions, 553 deletions
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index c0777a374a88..36b25418b214 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -3,6 +3,7 @@
* Silicon Laboratories CP210x USB to RS232 serial adaptor driver
*
* Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
+ * Copyright (C) 2010-2021 Johan Hovold (johan@kernel.org)
*
* Support to set flow control line levels using TIOCMGET and TIOCMSET
* thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
@@ -16,9 +17,7 @@
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
-#include <linux/moduleparam.h>
#include <linux/usb.h>
-#include <linux/uaccess.h>
#include <linux/usb/serial.h>
#include <linux/gpio/driver.h>
#include <linux/bitops.h>
@@ -31,42 +30,49 @@
*/
static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
static void cp210x_close(struct usb_serial_port *);
-static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *);
-static void cp210x_get_termios_port(struct usb_serial_port *port,
- tcflag_t *cflagp, unsigned int *baudp);
static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
- struct ktermios *);
+ const struct ktermios *);
static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
- struct ktermios*);
+ const struct ktermios *);
static bool cp210x_tx_empty(struct usb_serial_port *port);
static int cp210x_tiocmget(struct tty_struct *);
static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
static int cp210x_tiocmset_port(struct usb_serial_port *port,
unsigned int, unsigned int);
-static void cp210x_break_ctl(struct tty_struct *, int);
+static int cp210x_break_ctl(struct tty_struct *, int);
static int cp210x_attach(struct usb_serial *);
static void cp210x_disconnect(struct usb_serial *);
static void cp210x_release(struct usb_serial *);
static int cp210x_port_probe(struct usb_serial_port *);
-static int cp210x_port_remove(struct usb_serial_port *);
-static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
+static void cp210x_port_remove(struct usb_serial_port *);
+static void cp210x_dtr_rts(struct usb_serial_port *port, int on);
+static void cp210x_process_read_urb(struct urb *urb);
+static void cp210x_enable_event_mode(struct usb_serial_port *port);
+static void cp210x_disable_event_mode(struct usb_serial_port *port);
static const struct usb_device_id id_table[] = {
+ { USB_DEVICE(0x0404, 0x034C) }, /* NCR Retail IO Box */
{ USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
{ USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
{ USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
{ USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
+ { USB_DEVICE(0x04BF, 0x1301) }, /* TDK Corporation NC0110013M - Network Controller */
+ { USB_DEVICE(0x04BF, 0x1303) }, /* TDK Corporation MM0110113M - i3 Micro Module */
{ USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
{ USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
{ USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
{ USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
+ { USB_DEVICE(0x0908, 0x0070) }, /* Siemens SCALANCE LPE-9000 USB Serial Console */
{ USB_DEVICE(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
+ { USB_DEVICE(0x0988, 0x0578) }, /* Teraoka AD2000 */
+ { USB_DEVICE(0x0B00, 0x3070) }, /* Ingenico 3070 */
{ USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
{ USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
{ USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
{ USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
{ USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
{ USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
+ { USB_DEVICE(0x106F, 0x0003) }, /* CPI / Money Controls Bulk Coin Recycler */
{ USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
{ USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
{ USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
@@ -79,6 +85,7 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
{ USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
{ USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
+ { USB_DEVICE(0x10C4, 0x8056) }, /* Lorenz Messtechnik devices */
{ USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
{ USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
{ USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
@@ -115,6 +122,7 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
{ USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
{ USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
+ { USB_DEVICE(0x10C4, 0x82AA) }, /* Silicon Labs IFS-USB-DATACABLE used with Quint UPS */
{ USB_DEVICE(0x10C4, 0x82EF) }, /* CESINEL FALCO 6105 AC Power Supply */
{ USB_DEVICE(0x10C4, 0x82F1) }, /* CESINEL MEDCAL EFD Earth Fault Detector */
{ USB_DEVICE(0x10C4, 0x82F2) }, /* CESINEL MEDCAL ST Network Analyzer */
@@ -123,8 +131,10 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
{ USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
{ USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
+ { USB_DEVICE(0x10C4, 0x83AA) }, /* Mark-10 Digital Force Gauge */
{ USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
{ USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
+ { USB_DEVICE(0x10C4, 0x8414) }, /* Decagon USB Cable Adapter */
{ USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
{ USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
{ USB_DEVICE(0x10C4, 0x8470) }, /* Juniper Networks BX Series System Console */
@@ -136,12 +146,15 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
{ USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
{ USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
+ { USB_DEVICE(0x10C4, 0x863C) }, /* MGP Instruments PDS100 */
{ USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
{ USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
+ { USB_DEVICE(0x10C4, 0x87ED) }, /* IMST USB-Stick for Smart Meter */
{ USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
{ USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
{ USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
{ USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
+ { USB_DEVICE(0x10C4, 0x88D8) }, /* Acuity Brands nLight Air Adapter */
{ USB_DEVICE(0x10C4, 0x88FB) }, /* CESINEL MEDCAL STII Network Analyzer */
{ USB_DEVICE(0x10C4, 0x8938) }, /* CESINEL MEDCAL S II Network Analyzer */
{ USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
@@ -151,6 +164,7 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x10C4, 0x89A4) }, /* CESINEL FTBC Flexible Thyristor Bridge Controller */
{ USB_DEVICE(0x10C4, 0x89FB) }, /* Qivicon ZigBee USB Radio Stick */
{ USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
+ { USB_DEVICE(0x10C4, 0x8A5B) }, /* CEL EM3588 ZigBee USB Stick */
{ USB_DEVICE(0x10C4, 0x8A5E) }, /* CEL EM3588 ZigBee USB Stick Long Range */
{ USB_DEVICE(0x10C4, 0x8B34) }, /* Qivicon ZigBee USB Radio Stick */
{ USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
@@ -166,6 +180,7 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
{ USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
{ USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
+ { USB_DEVICE(0x11CA, 0x0212) }, /* Verifone USB to Printer (UART, CP2102) */
{ USB_DEVICE(0x12B8, 0xEC60) }, /* Link G4 ECU */
{ USB_DEVICE(0x12B8, 0xEC62) }, /* Link G4+ ECU */
{ USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
@@ -187,6 +202,10 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
{ USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
{ USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
+ { USB_DEVICE(0x17A8, 0x0011) }, /* Kamstrup 444 MHz RF sniffer */
+ { USB_DEVICE(0x17A8, 0x0013) }, /* Kamstrup 870 MHz RF sniffer */
+ { USB_DEVICE(0x17A8, 0x0101) }, /* Kamstrup 868 MHz wM-Bus C-Mode Meter Reader (Int Ant) */
+ { USB_DEVICE(0x17A8, 0x0102) }, /* Kamstrup 868 MHz wM-Bus C-Mode Meter Reader (Ext Ant) */
{ USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
{ USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
{ USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
@@ -198,9 +217,13 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x1901, 0x0194) }, /* GE Healthcare Remote Alarm Box */
{ USB_DEVICE(0x1901, 0x0195) }, /* GE B850/B650/B450 CP2104 DP UART interface */
{ USB_DEVICE(0x1901, 0x0196) }, /* GE B850 CP2105 DP UART interface */
+ { USB_DEVICE(0x1901, 0x0197) }, /* GE CS1000 M.2 Key E serial interface */
+ { USB_DEVICE(0x1901, 0x0198) }, /* GE CS1000 Display serial interface */
+ { USB_DEVICE(0x199B, 0xBA30) }, /* LORD WSDA-200-USB */
{ USB_DEVICE(0x19CF, 0x3000) }, /* Parrot NMEA GPS Flight Recorder */
{ USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
{ USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
+ { USB_DEVICE(0x1B93, 0x1013) }, /* Phoenix Contact UPS Device */
{ USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
{ USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
{ USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
@@ -225,6 +248,7 @@ static const struct usb_device_id id_table[] = {
{ USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
{ USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
{ USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
+ { USB_DEVICE(0x2184, 0x0030) }, /* GW Instek GDM-834x Digital Multimeter */
{ USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */
{ USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
{ USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
@@ -240,23 +264,42 @@ struct cp210x_serial_private {
#ifdef CONFIG_GPIOLIB
struct gpio_chip gc;
bool gpio_registered;
- u8 gpio_pushpull;
- u8 gpio_altfunc;
- u8 gpio_input;
+ u16 gpio_pushpull;
+ u16 gpio_altfunc;
+ u16 gpio_input;
#endif
u8 partnum;
+ u32 fw_version;
+ speed_t min_speed;
speed_t max_speed;
bool use_actual_rate;
+ bool no_flow_control;
+ bool no_event_mode;
+};
+
+enum cp210x_event_state {
+ ES_DATA,
+ ES_ESCAPE,
+ ES_LSR,
+ ES_LSR_DATA_0,
+ ES_LSR_DATA_1,
+ ES_MSR
};
struct cp210x_port_private {
- __u8 bInterfaceNumber;
- bool has_swapped_line_ctl;
+ u8 bInterfaceNumber;
+ bool event_mode;
+ enum cp210x_event_state event_state;
+ u8 lsr;
+
+ struct mutex mutex;
+ bool crtscts;
+ bool dtr;
+ bool rts;
};
static struct usb_serial_driver cp210x_device = {
.driver = {
- .owner = THIS_MODULE,
.name = "cp210x",
},
.id_table = id_table,
@@ -268,14 +311,18 @@ static struct usb_serial_driver cp210x_device = {
.break_ctl = cp210x_break_ctl,
.set_termios = cp210x_set_termios,
.tx_empty = cp210x_tx_empty,
+ .throttle = usb_serial_generic_throttle,
+ .unthrottle = usb_serial_generic_unthrottle,
.tiocmget = cp210x_tiocmget,
.tiocmset = cp210x_tiocmset,
+ .get_icount = usb_serial_generic_get_icount,
.attach = cp210x_attach,
.disconnect = cp210x_disconnect,
.release = cp210x_release,
.port_probe = cp210x_port_probe,
.port_remove = cp210x_port_remove,
- .dtr_rts = cp210x_dtr_rts
+ .dtr_rts = cp210x_dtr_rts,
+ .process_read_urb = cp210x_process_read_urb,
};
static struct usb_serial_driver * const serial_drivers[] = {
@@ -358,8 +405,20 @@ static struct usb_serial_driver * const serial_drivers[] = {
#define CONTROL_WRITE_DTR 0x0100
#define CONTROL_WRITE_RTS 0x0200
+/* CP210X_(GET|SET)_CHARS */
+struct cp210x_special_chars {
+ u8 bEofChar;
+ u8 bErrorChar;
+ u8 bBreakChar;
+ u8 bEventChar;
+ u8 bXonChar;
+ u8 bXoffChar;
+};
+
/* CP210X_VENDOR_SPECIFIC values */
+#define CP210X_GET_FW_VER 0x000E
#define CP210X_READ_2NCONFIG 0x000E
+#define CP210X_GET_FW_VER_2N 0x0010
#define CP210X_READ_LATCH 0x00C2
#define CP210X_GET_PARTNUM 0x370B
#define CP210X_GET_PORTCONFIG 0x370C
@@ -397,27 +456,33 @@ struct cp210x_comm_status {
*/
#define PURGE_ALL 0x000f
+/* CP210X_EMBED_EVENTS */
+#define CP210X_ESCCHAR 0xec
+
+#define CP210X_LSR_OVERRUN BIT(1)
+#define CP210X_LSR_PARITY BIT(2)
+#define CP210X_LSR_FRAME BIT(3)
+#define CP210X_LSR_BREAK BIT(4)
+
+
/* CP210X_GET_FLOW/CP210X_SET_FLOW read/write these 0x10 bytes */
struct cp210x_flow_ctl {
__le32 ulControlHandshake;
__le32 ulFlowReplace;
__le32 ulXonLimit;
__le32 ulXoffLimit;
-} __packed;
+};
/* cp210x_flow_ctl::ulControlHandshake */
#define CP210X_SERIAL_DTR_MASK GENMASK(1, 0)
-#define CP210X_SERIAL_DTR_SHIFT(_mode) (_mode)
+#define CP210X_SERIAL_DTR_INACTIVE (0 << 0)
+#define CP210X_SERIAL_DTR_ACTIVE (1 << 0)
+#define CP210X_SERIAL_DTR_FLOW_CTL (2 << 0)
#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)
@@ -425,28 +490,25 @@ struct cp210x_flow_ctl {
#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_RTS_INACTIVE (0 << 6)
+#define CP210X_SERIAL_RTS_ACTIVE (1 << 6)
+#define CP210X_SERIAL_RTS_FLOW_CTL (2 << 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.
+ * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xf bytes
+ * on a CP2105 chip. Structure needs padding due to unused/unspecified bytes.
*/
-struct cp210x_config {
+struct cp210x_dual_port_config {
__le16 gpio_mode;
u8 __pad0[2];
__le16 reset_state;
@@ -457,6 +519,19 @@ struct cp210x_config {
u8 device_cfg;
} __packed;
+/*
+ * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0xd bytes
+ * on a CP2104 chip. Structure needs padding due to unused/unspecified bytes.
+ */
+struct cp210x_single_port_config {
+ __le16 gpio_mode;
+ u8 __pad0[2];
+ __le16 reset_state;
+ u8 __pad1[4];
+ __le16 suspend_state;
+ u8 device_cfg;
+} __packed;
+
/* GPIO modes */
#define CP210X_SCI_GPIO_MODE_OFFSET 9
#define CP210X_SCI_GPIO_MODE_MASK GENMASK(11, 9)
@@ -464,22 +539,90 @@ struct cp210x_config {
#define CP210X_ECI_GPIO_MODE_OFFSET 2
#define CP210X_ECI_GPIO_MODE_MASK GENMASK(3, 2)
+#define CP210X_GPIO_MODE_OFFSET 8
+#define CP210X_GPIO_MODE_MASK GENMASK(11, 8)
+
/* 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)
+/* CP2104 port configuration values */
+#define CP2104_GPIO0_TXLED_MODE BIT(0)
+#define CP2104_GPIO1_RXLED_MODE BIT(1)
+#define CP2104_GPIO2_RS485_MODE BIT(2)
+
+struct cp210x_quad_port_state {
+ __le16 gpio_mode_pb0;
+ __le16 gpio_mode_pb1;
+ __le16 gpio_mode_pb2;
+ __le16 gpio_mode_pb3;
+ __le16 gpio_mode_pb4;
+
+ __le16 gpio_lowpower_pb0;
+ __le16 gpio_lowpower_pb1;
+ __le16 gpio_lowpower_pb2;
+ __le16 gpio_lowpower_pb3;
+ __le16 gpio_lowpower_pb4;
+
+ __le16 gpio_latch_pb0;
+ __le16 gpio_latch_pb1;
+ __le16 gpio_latch_pb2;
+ __le16 gpio_latch_pb3;
+ __le16 gpio_latch_pb4;
+};
+
+/*
+ * CP210X_VENDOR_SPECIFIC, CP210X_GET_PORTCONFIG call reads these 0x49 bytes
+ * on a CP2108 chip.
+ *
+ * See https://www.silabs.com/documents/public/application-notes/an978-cp210x-usb-to-uart-api-specification.pdf
+ */
+struct cp210x_quad_port_config {
+ struct cp210x_quad_port_state reset_state;
+ struct cp210x_quad_port_state suspend_state;
+ u8 ipdelay_ifc[4];
+ u8 enhancedfxn_ifc[4];
+ u8 enhancedfxn_device;
+ u8 extclkfreq[4];
+} __packed;
+
+#define CP2108_EF_IFC_GPIO_TXLED 0x01
+#define CP2108_EF_IFC_GPIO_RXLED 0x02
+#define CP2108_EF_IFC_GPIO_RS485 0x04
+#define CP2108_EF_IFC_GPIO_RS485_LOGIC 0x08
+#define CP2108_EF_IFC_GPIO_CLOCK 0x10
+#define CP2108_EF_IFC_DYNAMIC_SUSPEND 0x40
+
/* 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. */
+/* CP2102N QFN20 port configuration values */
+#define CP2102N_QFN20_GPIO2_TXLED_MODE BIT(2)
+#define CP2102N_QFN20_GPIO3_RXLED_MODE BIT(3)
+#define CP2102N_QFN20_GPIO1_RS485_MODE BIT(4)
+#define CP2102N_QFN20_GPIO0_CLK_MODE BIT(6)
+
+/*
+ * CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x02 bytes
+ * for CP2102N, CP2103, CP2104 and CP2105.
+ */
struct cp210x_gpio_write {
u8 mask;
u8 state;
-} __packed;
+};
+
+/*
+ * CP210X_VENDOR_SPECIFIC, CP210X_WRITE_LATCH call writes these 0x04 bytes
+ * for CP2108.
+ */
+struct cp210x_gpio_write16 {
+ __le16 mask;
+ __le16 state;
+};
/*
* Helper to get interface number when we only have struct usb_serial.
@@ -502,81 +645,19 @@ static int cp210x_read_reg_block(struct usb_serial_port *port, u8 req,
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
- void *dmabuf;
int result;
- dmabuf = kmalloc(bufsize, GFP_KERNEL);
- if (!dmabuf) {
- /*
- * 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 -ENOMEM;
- }
- result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
- req, REQTYPE_INTERFACE_TO_HOST, 0,
- port_priv->bInterfaceNumber, dmabuf, bufsize,
- USB_CTRL_SET_TIMEOUT);
- if (result == bufsize) {
- memcpy(buf, dmabuf, bufsize);
- result = 0;
- } else {
+ result = usb_control_msg_recv(serial->dev, 0, req,
+ REQTYPE_INTERFACE_TO_HOST, 0,
+ port_priv->bInterfaceNumber, buf, bufsize,
+ USB_CTRL_SET_TIMEOUT, GFP_KERNEL);
+ if (result) {
dev_err(&port->dev, "failed get req 0x%x size %d status: %d\n",
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);
- }
-
- kfree(dmabuf);
-
- 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;
+ return result;
}
- *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;
}
@@ -595,31 +676,19 @@ static int cp210x_read_u8_reg(struct usb_serial_port *port, u8 req, u8 *val)
static int cp210x_read_vendor_block(struct usb_serial *serial, u8 type, u16 val,
void *buf, int bufsize)
{
- void *dmabuf;
int result;
- dmabuf = kmalloc(bufsize, GFP_KERNEL);
- if (!dmabuf)
- return -ENOMEM;
-
- result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
- CP210X_VENDOR_SPECIFIC, type, val,
- cp210x_interface_num(serial), dmabuf, bufsize,
- USB_CTRL_GET_TIMEOUT);
- if (result == bufsize) {
- memcpy(buf, dmabuf, bufsize);
- result = 0;
- } else {
+ result = usb_control_msg_recv(serial->dev, 0, CP210X_VENDOR_SPECIFIC,
+ type, val, cp210x_interface_num(serial), buf, bufsize,
+ USB_CTRL_GET_TIMEOUT, GFP_KERNEL);
+ if (result) {
dev_err(&serial->interface->dev,
"failed to get vendor val 0x%04x size %d: %d\n", val,
bufsize, result);
- if (result >= 0)
- result = -EIO;
+ return result;
}
- kfree(dmabuf);
-
- return result;
+ return 0;
}
/*
@@ -653,30 +722,19 @@ static int cp210x_write_reg_block(struct usb_serial_port *port, u8 req,
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
- void *dmabuf;
int result;
- dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
- if (!dmabuf)
- return -ENOMEM;
-
- result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
- req, REQTYPE_HOST_TO_INTERFACE, 0,
- port_priv->bInterfaceNumber, dmabuf, bufsize,
- USB_CTRL_SET_TIMEOUT);
-
- kfree(dmabuf);
-
- if (result == bufsize) {
- result = 0;
- } else {
+ result = usb_control_msg_send(serial->dev, 0, req,
+ REQTYPE_HOST_TO_INTERFACE, 0,
+ port_priv->bInterfaceNumber, buf, bufsize,
+ USB_CTRL_SET_TIMEOUT, GFP_KERNEL);
+ if (result) {
dev_err(&port->dev, "failed set req 0x%x size %d status: %d\n",
req, bufsize, result);
- if (result >= 0)
- result = -EIO;
+ return result;
}
- return result;
+ return 0;
}
/*
@@ -699,115 +757,166 @@ static int cp210x_write_u32_reg(struct usb_serial_port *port, u8 req, u32 val)
static int cp210x_write_vendor_block(struct usb_serial *serial, u8 type,
u16 val, void *buf, int bufsize)
{
- void *dmabuf;
int result;
- dmabuf = kmemdup(buf, bufsize, GFP_KERNEL);
- if (!dmabuf)
- return -ENOMEM;
-
- result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
- CP210X_VENDOR_SPECIFIC, type, val,
- cp210x_interface_num(serial), dmabuf, bufsize,
- USB_CTRL_SET_TIMEOUT);
-
- kfree(dmabuf);
-
- if (result == bufsize) {
- result = 0;
- } else {
+ result = usb_control_msg_send(serial->dev, 0, CP210X_VENDOR_SPECIFIC,
+ type, val, cp210x_interface_num(serial), buf, bufsize,
+ USB_CTRL_SET_TIMEOUT, GFP_KERNEL);
+ if (result) {
dev_err(&serial->interface->dev,
"failed to set vendor val 0x%04x size %d: %d\n", val,
bufsize, result);
- if (result >= 0)
- result = -EIO;
+ return result;
}
- return result;
+ return 0;
}
#endif
-/*
- * 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)
+static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
- u16 line_ctl_save;
- u16 line_ctl_test;
- int err;
+ int result;
- err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_save);
- if (err)
- return err;
+ result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE);
+ if (result) {
+ dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
+ return result;
+ }
- err = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, 0x800);
- if (err)
- return err;
+ if (tty)
+ cp210x_set_termios(tty, port, NULL);
- err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, &line_ctl_test);
- if (err)
- return err;
+ result = usb_serial_generic_open(tty, port);
+ if (result)
+ goto err_disable;
- if (line_ctl_test == 8) {
- port_priv->has_swapped_line_ctl = true;
- line_ctl_save = swab16(line_ctl_save);
- }
+ return 0;
- return cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, line_ctl_save);
+err_disable:
+ cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
+ port_priv->event_mode = false;
+
+ return result;
}
-/*
- * 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)
+static void cp210x_close(struct usb_serial_port *port)
{
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
- int err;
- err = cp210x_read_u16_reg(port, CP210X_GET_LINE_CTL, ctl);
- if (err)
- return err;
+ usb_serial_generic_close(port);
- /* Workaround swapped bytes in 16-bit value from CP210X_GET_LINE_CTL */
- if (port_priv->has_swapped_line_ctl)
- *ctl = swab16(*ctl);
+ /* Clear both queues; cp2108 needs this to avoid an occasional hang */
+ cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL);
- return 0;
+ cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
+
+ /* Disabling the interface disables event-insertion mode. */
+ port_priv->event_mode = false;
}
-static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
+static void cp210x_process_lsr(struct usb_serial_port *port, unsigned char lsr, char *flag)
{
- int result;
+ if (lsr & CP210X_LSR_BREAK) {
+ port->icount.brk++;
+ *flag = TTY_BREAK;
+ } else if (lsr & CP210X_LSR_PARITY) {
+ port->icount.parity++;
+ *flag = TTY_PARITY;
+ } else if (lsr & CP210X_LSR_FRAME) {
+ port->icount.frame++;
+ *flag = TTY_FRAME;
+ }
- result = cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_ENABLE);
- if (result) {
- dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
- return result;
+ if (lsr & CP210X_LSR_OVERRUN) {
+ port->icount.overrun++;
+ tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
}
+}
- /* Configure the termios structure */
- cp210x_get_termios(tty, port);
+static bool cp210x_process_char(struct usb_serial_port *port, unsigned char *ch, char *flag)
+{
+ struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
- /* The baud rate must be initialised on cp2104 */
- if (tty)
- cp210x_change_speed(tty, port, NULL);
+ switch (port_priv->event_state) {
+ case ES_DATA:
+ if (*ch == CP210X_ESCCHAR) {
+ port_priv->event_state = ES_ESCAPE;
+ break;
+ }
+ return false;
+ case ES_ESCAPE:
+ switch (*ch) {
+ case 0:
+ dev_dbg(&port->dev, "%s - escape char\n", __func__);
+ *ch = CP210X_ESCCHAR;
+ port_priv->event_state = ES_DATA;
+ return false;
+ case 1:
+ port_priv->event_state = ES_LSR_DATA_0;
+ break;
+ case 2:
+ port_priv->event_state = ES_LSR;
+ break;
+ case 3:
+ port_priv->event_state = ES_MSR;
+ break;
+ default:
+ dev_err(&port->dev, "malformed event 0x%02x\n", *ch);
+ port_priv->event_state = ES_DATA;
+ break;
+ }
+ break;
+ case ES_LSR_DATA_0:
+ port_priv->lsr = *ch;
+ port_priv->event_state = ES_LSR_DATA_1;
+ break;
+ case ES_LSR_DATA_1:
+ dev_dbg(&port->dev, "%s - lsr = 0x%02x, data = 0x%02x\n",
+ __func__, port_priv->lsr, *ch);
+ cp210x_process_lsr(port, port_priv->lsr, flag);
+ port_priv->event_state = ES_DATA;
+ return false;
+ case ES_LSR:
+ dev_dbg(&port->dev, "%s - lsr = 0x%02x\n", __func__, *ch);
+ port_priv->lsr = *ch;
+ cp210x_process_lsr(port, port_priv->lsr, flag);
+ port_priv->event_state = ES_DATA;
+ break;
+ case ES_MSR:
+ dev_dbg(&port->dev, "%s - msr = 0x%02x\n", __func__, *ch);
+ /* unimplemented */
+ port_priv->event_state = ES_DATA;
+ break;
+ }
- return usb_serial_generic_open(tty, port);
+ return true;
}
-static void cp210x_close(struct usb_serial_port *port)
+static void cp210x_process_read_urb(struct urb *urb)
{
- usb_serial_generic_close(port);
+ struct usb_serial_port *port = urb->context;
+ struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
+ unsigned char *ch = urb->transfer_buffer;
+ char flag;
+ int i;
- /* Clear both queues; cp2108 needs this to avoid an occasional hang */
- cp210x_write_u16_reg(port, CP210X_PURGE, PURGE_ALL);
+ if (!urb->actual_length)
+ return;
- cp210x_write_u16_reg(port, CP210X_IFC_ENABLE, UART_DISABLE);
+ if (port_priv->event_mode) {
+ for (i = 0; i < urb->actual_length; i++, ch++) {
+ flag = TTY_NORMAL;
+
+ if (cp210x_process_char(port, ch, &flag))
+ continue;
+
+ tty_insert_flip_char(&port->port, *ch, flag);
+ }
+ } else {
+ tty_insert_flip_string(&port->port, ch, urb->actual_length);
+ }
+ tty_flip_buffer_push(&port->port);
}
/*
@@ -818,29 +927,21 @@ static int cp210x_get_tx_queue_byte_count(struct usb_serial_port *port,
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
- struct cp210x_comm_status *sts;
+ struct cp210x_comm_status sts;
int result;
- sts = kmalloc(sizeof(*sts), GFP_KERNEL);
- if (!sts)
- return -ENOMEM;
-
- result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
- CP210X_GET_COMM_STATUS, REQTYPE_INTERFACE_TO_HOST,
- 0, port_priv->bInterfaceNumber, sts, sizeof(*sts),
- USB_CTRL_GET_TIMEOUT);
- if (result == sizeof(*sts)) {
- *count = le32_to_cpu(sts->ulAmountInOutQueue);
- result = 0;
- } else {
+ result = usb_control_msg_recv(serial->dev, 0, CP210X_GET_COMM_STATUS,
+ REQTYPE_INTERFACE_TO_HOST, 0,
+ port_priv->bInterfaceNumber, &sts, sizeof(sts),
+ USB_CTRL_GET_TIMEOUT, GFP_KERNEL);
+ if (result) {
dev_err(&port->dev, "failed to get comm status: %d\n", result);
- if (result >= 0)
- result = -EIO;
+ return result;
}
- kfree(sts);
+ *count = le32_to_cpu(sts.ulAmountInOutQueue);
- return result;
+ return 0;
}
static bool cp210x_tx_empty(struct usb_serial_port *port)
@@ -855,150 +956,6 @@ static bool cp210x_tx_empty(struct usb_serial_port *port)
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
- */
-static void cp210x_get_termios(struct tty_struct *tty,
- struct usb_serial_port *port)
-{
- unsigned int baud;
-
- if (tty) {
- cp210x_get_termios_port(tty->driver_data,
- &tty->termios.c_cflag, &baud);
- tty_encode_baud_rate(tty, baud, 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.
- */
-static void cp210x_get_termios_port(struct usb_serial_port *port,
- tcflag_t *cflagp, unsigned int *baudp)
-{
- struct device *dev = &port->dev;
- 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(dev, "%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(dev, "%s - data bits = 5\n", __func__);
- cflag |= CS5;
- break;
- case BITS_DATA_6:
- dev_dbg(dev, "%s - data bits = 6\n", __func__);
- cflag |= CS6;
- break;
- case BITS_DATA_7:
- dev_dbg(dev, "%s - data bits = 7\n", __func__);
- cflag |= CS7;
- break;
- case BITS_DATA_8:
- dev_dbg(dev, "%s - data bits = 8\n", __func__);
- cflag |= CS8;
- break;
- case BITS_DATA_9:
- dev_dbg(dev, "%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(dev, "%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(dev, "%s - parity = NONE\n", __func__);
- cflag &= ~PARENB;
- break;
- case BITS_PARITY_ODD:
- dev_dbg(dev, "%s - parity = ODD\n", __func__);
- cflag |= (PARENB|PARODD);
- break;
- case BITS_PARITY_EVEN:
- dev_dbg(dev, "%s - parity = EVEN\n", __func__);
- cflag &= ~PARODD;
- cflag |= PARENB;
- break;
- case BITS_PARITY_MARK:
- dev_dbg(dev, "%s - parity = MARK\n", __func__);
- cflag |= (PARENB|PARODD|CMSPAR);
- break;
- case BITS_PARITY_SPACE:
- dev_dbg(dev, "%s - parity = SPACE\n", __func__);
- cflag &= ~PARODD;
- cflag |= (PARENB|CMSPAR);
- break;
- default:
- dev_dbg(dev, "%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(dev, "%s - stop bits = 1\n", __func__);
- break;
- case BITS_STOP_1_5:
- dev_dbg(dev, "%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(dev, "%s - stop bits = 2\n", __func__);
- cflag |= CSTOPB;
- break;
- default:
- dev_dbg(dev, "%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(dev, "%s - flow control = CRTSCTS\n", __func__);
- cflag |= CRTSCTS;
- } else {
- dev_dbg(dev, "%s - flow control = NONE\n", __func__);
- cflag &= ~CRTSCTS;
- }
-
- *cflagp = cflag;
-}
-
struct cp210x_rate {
speed_t rate;
speed_t high;
@@ -1051,14 +1008,11 @@ static speed_t cp210x_get_an205_rate(speed_t baud)
return cp210x_an205_table1[i].rate;
}
-static speed_t cp210x_get_actual_rate(struct usb_serial *serial, speed_t baud)
+static speed_t cp210x_get_actual_rate(speed_t baud)
{
- struct cp210x_serial_private *priv = usb_get_serial_data(serial);
unsigned int prescale = 1;
unsigned int div;
- baud = clamp(baud, 300u, priv->max_speed);
-
if (baud <= 365)
prescale = 4;
@@ -1095,26 +1049,26 @@ static speed_t cp210x_get_actual_rate(struct usb_serial *serial, speed_t baud)
* otherwise.
*/
static void cp210x_change_speed(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct cp210x_serial_private *priv = usb_get_serial_data(serial);
u32 baud;
- baud = tty->termios.c_ospeed;
+ if (tty->termios.c_ospeed == 0)
+ return;
/*
* 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.
*/
+ baud = clamp(tty->termios.c_ospeed, priv->min_speed, priv->max_speed);
+
if (priv->use_actual_rate)
- baud = cp210x_get_actual_rate(serial, baud);
+ baud = cp210x_get_actual_rate(baud);
else if (baud < 1000000)
baud = cp210x_get_an205_rate(baud);
- else if (baud > priv->max_speed)
- baud = priv->max_speed;
dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
if (cp210x_write_u32_reg(port, CP210X_SET_BAUDRATE, baud)) {
@@ -1128,128 +1082,248 @@ static void cp210x_change_speed(struct tty_struct *tty,
tty_encode_baud_rate(tty, baud, baud);
}
+static void cp210x_enable_event_mode(struct usb_serial_port *port)
+{
+ struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);
+ struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
+ int ret;
+
+ if (port_priv->event_mode)
+ return;
+
+ if (priv->no_event_mode)
+ return;
+
+ port_priv->event_state = ES_DATA;
+ port_priv->event_mode = true;
+
+ ret = cp210x_write_u16_reg(port, CP210X_EMBED_EVENTS, CP210X_ESCCHAR);
+ if (ret) {
+ dev_err(&port->dev, "failed to enable events: %d\n", ret);
+ port_priv->event_mode = false;
+ }
+}
+
+static void cp210x_disable_event_mode(struct usb_serial_port *port)
+{
+ struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
+ int ret;
+
+ if (!port_priv->event_mode)
+ return;
+
+ ret = cp210x_write_u16_reg(port, CP210X_EMBED_EVENTS, 0);
+ if (ret) {
+ dev_err(&port->dev, "failed to disable events: %d\n", ret);
+ return;
+ }
+
+ port_priv->event_mode = false;
+}
+
+static bool cp210x_termios_change(const struct ktermios *a, const struct ktermios *b)
+{
+ bool iflag_change, cc_change;
+
+ iflag_change = ((a->c_iflag ^ b->c_iflag) & (INPCK | IXON | IXOFF));
+ cc_change = a->c_cc[VSTART] != b->c_cc[VSTART] ||
+ a->c_cc[VSTOP] != b->c_cc[VSTOP];
+
+ return tty_termios_hw_change(a, b) || iflag_change || cc_change;
+}
+
+static void cp210x_set_flow_control(struct tty_struct *tty,
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
+{
+ struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);
+ struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
+ struct cp210x_special_chars chars;
+ struct cp210x_flow_ctl flow_ctl;
+ u32 flow_repl;
+ u32 ctl_hs;
+ bool crtscts;
+ int ret;
+
+ /*
+ * Some CP2102N interpret ulXonLimit as ulFlowReplace (erratum
+ * CP2102N_E104). Report back that flow control is not supported.
+ */
+ if (priv->no_flow_control) {
+ tty->termios.c_cflag &= ~CRTSCTS;
+ tty->termios.c_iflag &= ~(IXON | IXOFF);
+ }
+
+ if (tty->termios.c_ospeed != 0 &&
+ old_termios && old_termios->c_ospeed != 0 &&
+ C_CRTSCTS(tty) == (old_termios->c_cflag & CRTSCTS) &&
+ I_IXON(tty) == (old_termios->c_iflag & IXON) &&
+ I_IXOFF(tty) == (old_termios->c_iflag & IXOFF) &&
+ START_CHAR(tty) == old_termios->c_cc[VSTART] &&
+ STOP_CHAR(tty) == old_termios->c_cc[VSTOP]) {
+ return;
+ }
+
+ if (I_IXON(tty) || I_IXOFF(tty)) {
+ memset(&chars, 0, sizeof(chars));
+
+ chars.bXonChar = START_CHAR(tty);
+ chars.bXoffChar = STOP_CHAR(tty);
+
+ ret = cp210x_write_reg_block(port, CP210X_SET_CHARS, &chars,
+ sizeof(chars));
+ if (ret) {
+ dev_err(&port->dev, "failed to set special chars: %d\n",
+ ret);
+ }
+ }
+
+ mutex_lock(&port_priv->mutex);
+
+ if (tty->termios.c_ospeed == 0) {
+ port_priv->dtr = false;
+ port_priv->rts = false;
+ } else if (old_termios && old_termios->c_ospeed == 0) {
+ port_priv->dtr = true;
+ port_priv->rts = true;
+ }
+
+ ret = cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
+ sizeof(flow_ctl));
+ if (ret)
+ goto out_unlock;
+
+ ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
+ flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace);
+
+ ctl_hs &= ~CP210X_SERIAL_DSR_HANDSHAKE;
+ ctl_hs &= ~CP210X_SERIAL_DCD_HANDSHAKE;
+ ctl_hs &= ~CP210X_SERIAL_DSR_SENSITIVITY;
+ ctl_hs &= ~CP210X_SERIAL_DTR_MASK;
+ if (port_priv->dtr)
+ ctl_hs |= CP210X_SERIAL_DTR_ACTIVE;
+ else
+ ctl_hs |= CP210X_SERIAL_DTR_INACTIVE;
+
+ flow_repl &= ~CP210X_SERIAL_RTS_MASK;
+ if (C_CRTSCTS(tty)) {
+ ctl_hs |= CP210X_SERIAL_CTS_HANDSHAKE;
+ if (port_priv->rts)
+ flow_repl |= CP210X_SERIAL_RTS_FLOW_CTL;
+ else
+ flow_repl |= CP210X_SERIAL_RTS_INACTIVE;
+ crtscts = true;
+ } else {
+ ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE;
+ if (port_priv->rts)
+ flow_repl |= CP210X_SERIAL_RTS_ACTIVE;
+ else
+ flow_repl |= CP210X_SERIAL_RTS_INACTIVE;
+ crtscts = false;
+ }
+
+ if (I_IXOFF(tty)) {
+ flow_repl |= CP210X_SERIAL_AUTO_RECEIVE;
+
+ flow_ctl.ulXonLimit = cpu_to_le32(128);
+ flow_ctl.ulXoffLimit = cpu_to_le32(128);
+ } else {
+ flow_repl &= ~CP210X_SERIAL_AUTO_RECEIVE;
+ }
+
+ if (I_IXON(tty))
+ flow_repl |= CP210X_SERIAL_AUTO_TRANSMIT;
+ else
+ flow_repl &= ~CP210X_SERIAL_AUTO_TRANSMIT;
+
+ dev_dbg(&port->dev, "%s - ctrl = 0x%02x, flow = 0x%02x\n", __func__,
+ ctl_hs, flow_repl);
+
+ flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs);
+ flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl);
+
+ ret = cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl,
+ sizeof(flow_ctl));
+ if (ret)
+ goto out_unlock;
+
+ port_priv->crtscts = crtscts;
+out_unlock:
+ mutex_unlock(&port_priv->mutex);
+}
+
static void cp210x_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
- struct device *dev = &port->dev;
- unsigned int cflag, old_cflag;
+ struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);
u16 bits;
+ int ret;
- cflag = tty->termios.c_cflag;
- old_cflag = old_termios->c_cflag;
+ if (old_termios && !cp210x_termios_change(&tty->termios, old_termios) &&
+ tty->termios.c_ospeed != 0)
+ return;
- if (tty->termios.c_ospeed != old_termios->c_ospeed)
+ if (!old_termios || tty->termios.c_ospeed != old_termios->c_ospeed)
cp210x_change_speed(tty, port, old_termios);
- /* If the number of data bits is to be updated */
- if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
- cp210x_get_line_ctl(port, &bits);
- bits &= ~BITS_DATA_MASK;
- switch (cflag & CSIZE) {
- case CS5:
- bits |= BITS_DATA_5;
- dev_dbg(dev, "%s - data bits = 5\n", __func__);
- break;
- case CS6:
- bits |= BITS_DATA_6;
- dev_dbg(dev, "%s - data bits = 6\n", __func__);
- break;
- case CS7:
- bits |= BITS_DATA_7;
- dev_dbg(dev, "%s - data bits = 7\n", __func__);
- break;
- case CS8:
- default:
- bits |= BITS_DATA_8;
- dev_dbg(dev, "%s - data bits = 8\n", __func__);
- break;
- }
- if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
- dev_dbg(dev, "Number of data bits requested not supported by device\n");
+ /* CP2101 only supports CS8, 1 stop bit and non-stick parity. */
+ if (priv->partnum == CP210X_PARTNUM_CP2101) {
+ tty->termios.c_cflag &= ~(CSIZE | CSTOPB | CMSPAR);
+ tty->termios.c_cflag |= CS8;
}
- if ((cflag & (PARENB|PARODD|CMSPAR)) !=
- (old_cflag & (PARENB|PARODD|CMSPAR))) {
- 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(dev, "%s - parity = MARK\n", __func__);
- } else {
- bits |= BITS_PARITY_SPACE;
- dev_dbg(dev, "%s - parity = SPACE\n", __func__);
- }
- } else {
- if (cflag & PARODD) {
- bits |= BITS_PARITY_ODD;
- dev_dbg(dev, "%s - parity = ODD\n", __func__);
- } else {
- bits |= BITS_PARITY_EVEN;
- dev_dbg(dev, "%s - parity = EVEN\n", __func__);
- }
- }
- }
- if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
- dev_dbg(dev, "Parity mode not supported by device\n");
+ bits = 0;
+
+ switch (C_CSIZE(tty)) {
+ case CS5:
+ bits |= BITS_DATA_5;
+ break;
+ case CS6:
+ bits |= BITS_DATA_6;
+ break;
+ case CS7:
+ bits |= BITS_DATA_7;
+ break;
+ case CS8:
+ default:
+ bits |= BITS_DATA_8;
+ break;
}
- if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
- cp210x_get_line_ctl(port, &bits);
- bits &= ~BITS_STOP_MASK;
- if (cflag & CSTOPB) {
- bits |= BITS_STOP_2;
- dev_dbg(dev, "%s - stop bits = 2\n", __func__);
+ if (C_PARENB(tty)) {
+ if (C_CMSPAR(tty)) {
+ if (C_PARODD(tty))
+ bits |= BITS_PARITY_MARK;
+ else
+ bits |= BITS_PARITY_SPACE;
} else {
- bits |= BITS_STOP_1;
- dev_dbg(dev, "%s - stop bits = 1\n", __func__);
+ if (C_PARODD(tty))
+ bits |= BITS_PARITY_ODD;
+ else
+ bits |= BITS_PARITY_EVEN;
}
- if (cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits))
- dev_dbg(dev, "Number of stop bits requested not supported by device\n");
}
- if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
- 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(dev, "%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(dev, "%s - flow control = CRTSCTS\n", __func__);
- } else {
- ctl_hs &= ~CP210X_SERIAL_CTS_HANDSHAKE;
+ if (C_CSTOPB(tty))
+ bits |= BITS_STOP_2;
+ else
+ bits |= BITS_STOP_1;
- flow_repl &= ~CP210X_SERIAL_RTS_MASK;
- flow_repl |= CP210X_SERIAL_RTS_SHIFT(
- CP210X_SERIAL_RTS_ACTIVE);
- dev_dbg(dev, "%s - flow control = NONE\n", __func__);
- }
+ ret = cp210x_write_u16_reg(port, CP210X_SET_LINE_CTL, bits);
+ if (ret)
+ dev_err(&port->dev, "failed to set line control: %d\n", ret);
- dev_dbg(dev, "%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));
- }
+ cp210x_set_flow_control(tty, port, old_termios);
+ /*
+ * Enable event-insertion mode only if input parity checking is
+ * enabled for now.
+ */
+ if (I_INPCK(tty))
+ cp210x_enable_event_mode(port);
+ else
+ cp210x_disable_event_mode(port);
}
static int cp210x_tiocmset(struct tty_struct *tty,
@@ -1262,36 +1336,85 @@ static int cp210x_tiocmset(struct tty_struct *tty,
static int cp210x_tiocmset_port(struct usb_serial_port *port,
unsigned int set, unsigned int clear)
{
+ struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
+ struct cp210x_flow_ctl flow_ctl;
+ u32 ctl_hs, flow_repl;
u16 control = 0;
+ int ret;
+
+ mutex_lock(&port_priv->mutex);
if (set & TIOCM_RTS) {
+ port_priv->rts = true;
control |= CONTROL_RTS;
control |= CONTROL_WRITE_RTS;
}
if (set & TIOCM_DTR) {
+ port_priv->dtr = true;
control |= CONTROL_DTR;
control |= CONTROL_WRITE_DTR;
}
if (clear & TIOCM_RTS) {
+ port_priv->rts = false;
control &= ~CONTROL_RTS;
control |= CONTROL_WRITE_RTS;
}
if (clear & TIOCM_DTR) {
+ port_priv->dtr = false;
control &= ~CONTROL_DTR;
control |= CONTROL_WRITE_DTR;
}
- dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
+ /*
+ * Use SET_FLOW to set DTR and enable/disable auto-RTS when hardware
+ * flow control is enabled.
+ */
+ if (port_priv->crtscts && control & CONTROL_WRITE_RTS) {
+ ret = cp210x_read_reg_block(port, CP210X_GET_FLOW, &flow_ctl,
+ sizeof(flow_ctl));
+ if (ret)
+ goto out_unlock;
+
+ ctl_hs = le32_to_cpu(flow_ctl.ulControlHandshake);
+ flow_repl = le32_to_cpu(flow_ctl.ulFlowReplace);
+
+ ctl_hs &= ~CP210X_SERIAL_DTR_MASK;
+ if (port_priv->dtr)
+ ctl_hs |= CP210X_SERIAL_DTR_ACTIVE;
+ else
+ ctl_hs |= CP210X_SERIAL_DTR_INACTIVE;
+
+ flow_repl &= ~CP210X_SERIAL_RTS_MASK;
+ if (port_priv->rts)
+ flow_repl |= CP210X_SERIAL_RTS_FLOW_CTL;
+ else
+ flow_repl |= CP210X_SERIAL_RTS_INACTIVE;
+
+ flow_ctl.ulControlHandshake = cpu_to_le32(ctl_hs);
+ flow_ctl.ulFlowReplace = cpu_to_le32(flow_repl);
+
+ dev_dbg(&port->dev, "%s - ctrl = 0x%02x, flow = 0x%02x\n",
+ __func__, ctl_hs, flow_repl);
+
+ ret = cp210x_write_reg_block(port, CP210X_SET_FLOW, &flow_ctl,
+ sizeof(flow_ctl));
+ } else {
+ dev_dbg(&port->dev, "%s - control = 0x%04x\n", __func__, control);
+
+ ret = cp210x_write_u16_reg(port, CP210X_SET_MHS, control);
+ }
+out_unlock:
+ mutex_unlock(&port_priv->mutex);
- return cp210x_write_u16_reg(port, CP210X_SET_MHS, control);
+ return ret;
}
-static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
+static void cp210x_dtr_rts(struct usb_serial_port *port, int on)
{
if (on)
- cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
+ cp210x_tiocmset_port(port, TIOCM_DTR | TIOCM_RTS, 0);
else
- cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
+ cp210x_tiocmset_port(port, 0, TIOCM_DTR | TIOCM_RTS);
}
static int cp210x_tiocmget(struct tty_struct *tty)
@@ -1311,78 +1434,116 @@ static int cp210x_tiocmget(struct tty_struct *tty)
|((control & CONTROL_RING)? TIOCM_RI : 0)
|((control & CONTROL_DCD) ? TIOCM_CD : 0);
- dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
+ dev_dbg(&port->dev, "%s - control = 0x%02x\n", __func__, control);
return result;
}
-static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
+static int cp210x_break_ctl(struct tty_struct *tty, int break_state)
{
struct usb_serial_port *port = tty->driver_data;
+ struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);
u16 state;
+ if (priv->partnum == CP210X_PARTNUM_CP2105) {
+ if (cp210x_interface_num(port->serial) == 1)
+ return -ENOTTY;
+ }
+
if (break_state == 0)
state = BREAK_OFF;
else
state = BREAK_ON;
+
dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
state == BREAK_OFF ? "off" : "on");
- cp210x_write_u16_reg(port, CP210X_SET_BREAK, state);
-}
-
-#ifdef CONFIG_GPIOLIB
-static int cp210x_gpio_request(struct gpio_chip *gc, unsigned int offset)
-{
- struct usb_serial *serial = gpiochip_get_data(gc);
- struct cp210x_serial_private *priv = usb_get_serial_data(serial);
- if (priv->gpio_altfunc & BIT(offset))
- return -ENODEV;
-
- return 0;
+ return cp210x_write_u16_reg(port, CP210X_SET_BREAK, state);
}
+#ifdef CONFIG_GPIOLIB
static int cp210x_gpio_get(struct gpio_chip *gc, unsigned int gpio)
{
struct usb_serial *serial = gpiochip_get_data(gc);
struct cp210x_serial_private *priv = usb_get_serial_data(serial);
- u8 req_type = REQTYPE_DEVICE_TO_HOST;
+ u8 req_type;
+ u16 mask;
int result;
- u8 buf;
+ int len;
+
+ result = usb_autopm_get_interface(serial->interface);
+ if (result)
+ return result;
- if (priv->partnum == CP210X_PARTNUM_CP2105)
+ switch (priv->partnum) {
+ case CP210X_PARTNUM_CP2105:
+ req_type = REQTYPE_INTERFACE_TO_HOST;
+ len = 1;
+ break;
+ case CP210X_PARTNUM_CP2108:
req_type = REQTYPE_INTERFACE_TO_HOST;
+ len = 2;
+ break;
+ default:
+ req_type = REQTYPE_DEVICE_TO_HOST;
+ len = 1;
+ break;
+ }
+
+ mask = 0;
+ result = cp210x_read_vendor_block(serial, req_type, CP210X_READ_LATCH,
+ &mask, len);
+
+ usb_autopm_put_interface(serial->interface);
- result = cp210x_read_vendor_block(serial, req_type,
- CP210X_READ_LATCH, &buf, sizeof(buf));
if (result < 0)
return result;
- return !!(buf & BIT(gpio));
+ le16_to_cpus(&mask);
+
+ return !!(mask & BIT(gpio));
}
-static void cp210x_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value)
+static int cp210x_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value)
{
struct usb_serial *serial = gpiochip_get_data(gc);
struct cp210x_serial_private *priv = usb_get_serial_data(serial);
+ struct cp210x_gpio_write16 buf16;
struct cp210x_gpio_write buf;
+ u16 mask, state;
+ u16 wIndex;
int result;
if (value == 1)
- buf.state = BIT(gpio);
+ state = BIT(gpio);
else
- buf.state = 0;
+ state = 0;
- buf.mask = BIT(gpio);
+ mask = BIT(gpio);
- if (priv->partnum == CP210X_PARTNUM_CP2105) {
+ result = usb_autopm_get_interface(serial->interface);
+ if (result)
+ goto out;
+
+ switch (priv->partnum) {
+ case CP210X_PARTNUM_CP2105:
+ buf.mask = (u8)mask;
+ buf.state = (u8)state;
result = cp210x_write_vendor_block(serial,
REQTYPE_HOST_TO_INTERFACE,
CP210X_WRITE_LATCH, &buf,
sizeof(buf));
- } else {
- u16 wIndex = buf.state << 8 | buf.mask;
-
+ break;
+ case CP210X_PARTNUM_CP2108:
+ buf16.mask = cpu_to_le16(mask);
+ buf16.state = cpu_to_le16(state);
+ result = cp210x_write_vendor_block(serial,
+ REQTYPE_HOST_TO_INTERFACE,
+ CP210X_WRITE_LATCH, &buf16,
+ sizeof(buf16));
+ break;
+ default:
+ wIndex = state << 8 | mask;
result = usb_control_msg(serial->dev,
usb_sndctrlpipe(serial->dev, 0),
CP210X_VENDOR_SPECIFIC,
@@ -1390,12 +1551,18 @@ static void cp210x_gpio_set(struct gpio_chip *gc, unsigned int gpio, int value)
CP210X_WRITE_LATCH,
wIndex,
NULL, 0, USB_CTRL_SET_TIMEOUT);
+ break;
}
+ usb_autopm_put_interface(serial->interface);
+out:
if (result < 0) {
dev_err(&serial->interface->dev, "failed to set GPIO value: %d\n",
result);
+ return result;
}
+
+ return 0;
}
static int cp210x_gpio_direction_get(struct gpio_chip *gc, unsigned int gpio)
@@ -1435,9 +1602,8 @@ static int cp210x_gpio_direction_output(struct gpio_chip *gc, unsigned int gpio,
struct cp210x_serial_private *priv = usb_get_serial_data(serial);
priv->gpio_input &= ~BIT(gpio);
- cp210x_gpio_set(gc, gpio, value);
- return 0;
+ return cp210x_gpio_set(gc, gpio, value);
}
static int cp210x_gpio_set_config(struct gpio_chip *gc, unsigned int gpio,
@@ -1459,6 +1625,24 @@ static int cp210x_gpio_set_config(struct gpio_chip *gc, unsigned int gpio,
return -ENOTSUPP;
}
+static int cp210x_gpio_init_valid_mask(struct gpio_chip *gc,
+ unsigned long *valid_mask, unsigned int ngpios)
+{
+ struct usb_serial *serial = gpiochip_get_data(gc);
+ struct cp210x_serial_private *priv = usb_get_serial_data(serial);
+ struct device *dev = &serial->interface->dev;
+ unsigned long altfunc_mask = priv->gpio_altfunc;
+
+ bitmap_complement(valid_mask, &altfunc_mask, ngpios);
+
+ if (bitmap_empty(valid_mask, ngpios))
+ dev_dbg(dev, "no pin configured for GPIO\n");
+ else
+ dev_dbg(dev, "GPIO.%*pbl configured for GPIO\n", ngpios,
+ valid_mask);
+ return 0;
+}
+
/*
* This function is for configuring GPIO using shared pins, where other signals
* are made unavailable by configuring the use of GPIO. This is believed to be
@@ -1470,7 +1654,7 @@ static int cp2105_gpioconf_init(struct usb_serial *serial)
{
struct cp210x_serial_private *priv = usb_get_serial_data(serial);
struct cp210x_pin_mode mode;
- struct cp210x_config config;
+ struct cp210x_dual_port_config config;
u8 intf_num = cp210x_interface_num(serial);
u8 iface_config;
int result;
@@ -1489,6 +1673,8 @@ static int cp2105_gpioconf_init(struct usb_serial *serial)
/* 2 banks of GPIO - One for the pins taken from each serial port */
if (intf_num == 0) {
+ priv->gc.ngpio = 2;
+
if (mode.eci == CP210X_PIN_MODE_MODEM) {
/* mark all GPIOs of this interface as reserved */
priv->gpio_altfunc = 0xff;
@@ -1499,8 +1685,9 @@ static int cp2105_gpioconf_init(struct usb_serial *serial)
priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) &
CP210X_ECI_GPIO_MODE_MASK) >>
CP210X_ECI_GPIO_MODE_OFFSET);
- priv->gc.ngpio = 2;
} else if (intf_num == 1) {
+ priv->gc.ngpio = 3;
+
if (mode.sci == CP210X_PIN_MODE_MODEM) {
/* mark all GPIOs of this interface as reserved */
priv->gpio_altfunc = 0xff;
@@ -1511,7 +1698,6 @@ static int cp2105_gpioconf_init(struct usb_serial *serial)
priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) &
CP210X_SCI_GPIO_MODE_MASK) >>
CP210X_SCI_GPIO_MODE_OFFSET);
- priv->gc.ngpio = 3;
} else {
return -ENODEV;
}
@@ -1529,6 +1715,111 @@ static int cp2105_gpioconf_init(struct usb_serial *serial)
return 0;
}
+static int cp2104_gpioconf_init(struct usb_serial *serial)
+{
+ struct cp210x_serial_private *priv = usb_get_serial_data(serial);
+ struct cp210x_single_port_config config;
+ u8 iface_config;
+ u8 gpio_latch;
+ int result;
+ u8 i;
+
+ result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
+ CP210X_GET_PORTCONFIG, &config,
+ sizeof(config));
+ if (result < 0)
+ return result;
+
+ priv->gc.ngpio = 4;
+
+ iface_config = config.device_cfg;
+ priv->gpio_pushpull = (u8)((le16_to_cpu(config.gpio_mode) &
+ CP210X_GPIO_MODE_MASK) >>
+ CP210X_GPIO_MODE_OFFSET);
+ gpio_latch = (u8)((le16_to_cpu(config.reset_state) &
+ CP210X_GPIO_MODE_MASK) >>
+ CP210X_GPIO_MODE_OFFSET);
+
+ /* mark all pins which are not in GPIO mode */
+ if (iface_config & CP2104_GPIO0_TXLED_MODE) /* GPIO 0 */
+ priv->gpio_altfunc |= BIT(0);
+ if (iface_config & CP2104_GPIO1_RXLED_MODE) /* GPIO 1 */
+ priv->gpio_altfunc |= BIT(1);
+ if (iface_config & CP2104_GPIO2_RS485_MODE) /* GPIO 2 */
+ priv->gpio_altfunc |= BIT(2);
+
+ /*
+ * Like CP2102N, CP2104 has also no strict input and output pin
+ * modes.
+ * Do the same input mode emulation as CP2102N.
+ */
+ for (i = 0; i < priv->gc.ngpio; ++i) {
+ /*
+ * Set direction to "input" iff pin is open-drain and reset
+ * value is 1.
+ */
+ if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i)))
+ priv->gpio_input |= BIT(i);
+ }
+
+ return 0;
+}
+
+static int cp2108_gpio_init(struct usb_serial *serial)
+{
+ struct cp210x_serial_private *priv = usb_get_serial_data(serial);
+ struct cp210x_quad_port_config config;
+ u16 gpio_latch;
+ int result;
+ u8 i;
+
+ result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
+ CP210X_GET_PORTCONFIG, &config,
+ sizeof(config));
+ if (result < 0)
+ return result;
+
+ priv->gc.ngpio = 16;
+ priv->gpio_pushpull = le16_to_cpu(config.reset_state.gpio_mode_pb1);
+ gpio_latch = le16_to_cpu(config.reset_state.gpio_latch_pb1);
+
+ /*
+ * Mark all pins which are not in GPIO mode.
+ *
+ * Refer to table 9.1 "GPIO Mode alternate Functions" in the datasheet:
+ * https://www.silabs.com/documents/public/data-sheets/cp2108-datasheet.pdf
+ *
+ * Alternate functions of GPIO0 to GPIO3 are determine by enhancedfxn_ifc[0]
+ * and the similarly for the other pins; enhancedfxn_ifc[1]: GPIO4 to GPIO7,
+ * enhancedfxn_ifc[2]: GPIO8 to GPIO11, enhancedfxn_ifc[3]: GPIO12 to GPIO15.
+ */
+ for (i = 0; i < 4; i++) {
+ if (config.enhancedfxn_ifc[i] & CP2108_EF_IFC_GPIO_TXLED)
+ priv->gpio_altfunc |= BIT(i * 4);
+ if (config.enhancedfxn_ifc[i] & CP2108_EF_IFC_GPIO_RXLED)
+ priv->gpio_altfunc |= BIT((i * 4) + 1);
+ if (config.enhancedfxn_ifc[i] & CP2108_EF_IFC_GPIO_RS485)
+ priv->gpio_altfunc |= BIT((i * 4) + 2);
+ if (config.enhancedfxn_ifc[i] & CP2108_EF_IFC_GPIO_CLOCK)
+ priv->gpio_altfunc |= BIT((i * 4) + 3);
+ }
+
+ /*
+ * Like CP2102N, CP2108 has also no strict input and output pin
+ * modes. Do the same input mode emulation as CP2102N.
+ */
+ for (i = 0; i < priv->gc.ngpio; ++i) {
+ /*
+ * Set direction to "input" iff pin is open-drain and reset
+ * value is 1.
+ */
+ if (!(priv->gpio_pushpull & BIT(i)) && (gpio_latch & BIT(i)))
+ priv->gpio_input |= BIT(i);
+ }
+
+ return 0;
+}
+
static int cp2102n_gpioconf_init(struct usb_serial *serial)
{
struct cp210x_serial_private *priv = usb_get_serial_data(serial);
@@ -1574,12 +1865,6 @@ static int cp2102n_gpioconf_init(struct usb_serial *serial)
if (config_version != 0x01)
return -ENOTSUPP;
- /*
- * We only support 4 GPIOs even on the QFN28 package, because
- * config locations of GPIOs 4-6 determined using reverse
- * engineering revealed conflicting offsets with other
- * documented functions. So we'll just play it safe for now.
- */
priv->gc.ngpio = 4;
/*
@@ -1592,7 +1877,32 @@ static int cp2102n_gpioconf_init(struct usb_serial *serial)
priv->gpio_pushpull = (gpio_pushpull >> 3) & 0x0f;
/* 0 indicates GPIO mode, 1 is alternate function */
- priv->gpio_altfunc = (gpio_ctrl >> 2) & 0x0f;
+ if (priv->partnum == CP210X_PARTNUM_CP2102N_QFN20) {
+ /* QFN20 is special... */
+ if (gpio_ctrl & CP2102N_QFN20_GPIO0_CLK_MODE) /* GPIO 0 */
+ priv->gpio_altfunc |= BIT(0);
+ if (gpio_ctrl & CP2102N_QFN20_GPIO1_RS485_MODE) /* GPIO 1 */
+ priv->gpio_altfunc |= BIT(1);
+ if (gpio_ctrl & CP2102N_QFN20_GPIO2_TXLED_MODE) /* GPIO 2 */
+ priv->gpio_altfunc |= BIT(2);
+ if (gpio_ctrl & CP2102N_QFN20_GPIO3_RXLED_MODE) /* GPIO 3 */
+ priv->gpio_altfunc |= BIT(3);
+ } else {
+ priv->gpio_altfunc = (gpio_ctrl >> 2) & 0x0f;
+ }
+
+ if (priv->partnum == CP210X_PARTNUM_CP2102N_QFN28) {
+ /*
+ * For the QFN28 package, GPIO4-6 are controlled by
+ * the low three bits of the mode/latch fields.
+ * Contrary to the document linked above, the bits for
+ * the SUSPEND pins are elsewhere. No alternate
+ * function is available for these pins.
+ */
+ priv->gc.ngpio = 7;
+ gpio_latch |= (gpio_rst_latch & 7) << 4;
+ priv->gpio_pushpull |= (gpio_pushpull & 7) << 4;
+ }
/*
* The CP2102N does not strictly has input and output pin modes,
@@ -1620,9 +1930,21 @@ static int cp210x_gpio_init(struct usb_serial *serial)
int result;
switch (priv->partnum) {
+ case CP210X_PARTNUM_CP2104:
+ result = cp2104_gpioconf_init(serial);
+ break;
case CP210X_PARTNUM_CP2105:
result = cp2105_gpioconf_init(serial);
break;
+ case CP210X_PARTNUM_CP2108:
+ /*
+ * The GPIOs are not tied to any specific port so only register
+ * once for interface 0.
+ */
+ if (cp210x_interface_num(serial) != 0)
+ return 0;
+ result = cp2108_gpio_init(serial);
+ break;
case CP210X_PARTNUM_CP2102N_QFN28:
case CP210X_PARTNUM_CP2102N_QFN24:
case CP210X_PARTNUM_CP2102N_QFN20:
@@ -1636,13 +1958,13 @@ static int cp210x_gpio_init(struct usb_serial *serial)
return result;
priv->gc.label = "cp210x";
- priv->gc.request = cp210x_gpio_request;
priv->gc.get_direction = cp210x_gpio_direction_get;
priv->gc.direction_input = cp210x_gpio_direction_input;
priv->gc.direction_output = cp210x_gpio_direction_output;
priv->gc.get = cp210x_gpio_get;
priv->gc.set = cp210x_gpio_set;
priv->gc.set_config = cp210x_gpio_set_config;
+ priv->gc.init_valid_mask = cp210x_gpio_init_valid_mask;
priv->gc.owner = THIS_MODULE;
priv->gc.parent = &serial->interface->dev;
priv->gc.base = -1;
@@ -1683,39 +2005,32 @@ static int cp210x_port_probe(struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
struct cp210x_port_private *port_priv;
- int ret;
port_priv = kzalloc(sizeof(*port_priv), GFP_KERNEL);
if (!port_priv)
return -ENOMEM;
port_priv->bInterfaceNumber = cp210x_interface_num(serial);
+ mutex_init(&port_priv->mutex);
usb_set_serial_port_data(port, port_priv);
- ret = cp210x_detect_swapped_line_ctl(port);
- if (ret) {
- kfree(port_priv);
- return ret;
- }
-
return 0;
}
-static int cp210x_port_remove(struct usb_serial_port *port)
+static void cp210x_port_remove(struct usb_serial_port *port)
{
struct cp210x_port_private *port_priv;
port_priv = usb_get_serial_port_data(port);
kfree(port_priv);
-
- return 0;
}
static void cp210x_init_max_speed(struct usb_serial *serial)
{
struct cp210x_serial_private *priv = usb_get_serial_data(serial);
bool use_actual_rate = false;
+ speed_t min = 300;
speed_t max;
switch (priv->partnum) {
@@ -1738,6 +2053,7 @@ static void cp210x_init_max_speed(struct usb_serial *serial)
use_actual_rate = true;
max = 2000000; /* ECI */
} else {
+ min = 2400;
max = 921600; /* SCI */
}
break;
@@ -1752,10 +2068,96 @@ static void cp210x_init_max_speed(struct usb_serial *serial)
break;
}
+ priv->min_speed = min;
priv->max_speed = max;
priv->use_actual_rate = use_actual_rate;
}
+static void cp2102_determine_quirks(struct usb_serial *serial)
+{
+ struct cp210x_serial_private *priv = usb_get_serial_data(serial);
+ u8 *buf;
+ int ret;
+
+ buf = kmalloc(2, GFP_KERNEL);
+ if (!buf)
+ return;
+ /*
+ * Some (possibly counterfeit) CP2102 do not support event-insertion
+ * mode and respond differently to malformed vendor requests.
+ * Specifically, they return one instead of two bytes when sent a
+ * two-byte part-number request.
+ */
+ ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
+ CP210X_VENDOR_SPECIFIC, REQTYPE_DEVICE_TO_HOST,
+ CP210X_GET_PARTNUM, 0, buf, 2, USB_CTRL_GET_TIMEOUT);
+ if (ret == 1) {
+ dev_dbg(&serial->interface->dev,
+ "device does not support event-insertion mode\n");
+ priv->no_event_mode = true;
+ }
+
+ kfree(buf);
+}
+
+static int cp210x_get_fw_version(struct usb_serial *serial, u16 value)
+{
+ struct cp210x_serial_private *priv = usb_get_serial_data(serial);
+ u8 ver[3];
+ int ret;
+
+ ret = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, value,
+ ver, sizeof(ver));
+ if (ret)
+ return ret;
+
+ dev_dbg(&serial->interface->dev, "%s - %d.%d.%d\n", __func__,
+ ver[0], ver[1], ver[2]);
+
+ priv->fw_version = ver[0] << 16 | ver[1] << 8 | ver[2];
+
+ return 0;
+}
+
+static void cp210x_determine_type(struct usb_serial *serial)
+{
+ struct cp210x_serial_private *priv = usb_get_serial_data(serial);
+ int ret;
+
+ ret = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
+ CP210X_GET_PARTNUM, &priv->partnum,
+ sizeof(priv->partnum));
+ if (ret < 0) {
+ dev_warn(&serial->interface->dev,
+ "querying part number failed\n");
+ priv->partnum = CP210X_PARTNUM_UNKNOWN;
+ return;
+ }
+
+ dev_dbg(&serial->interface->dev, "partnum = 0x%02x\n", priv->partnum);
+
+ switch (priv->partnum) {
+ case CP210X_PARTNUM_CP2102:
+ cp2102_determine_quirks(serial);
+ break;
+ case CP210X_PARTNUM_CP2105:
+ case CP210X_PARTNUM_CP2108:
+ cp210x_get_fw_version(serial, CP210X_GET_FW_VER);
+ break;
+ case CP210X_PARTNUM_CP2102N_QFN28:
+ case CP210X_PARTNUM_CP2102N_QFN24:
+ case CP210X_PARTNUM_CP2102N_QFN20:
+ ret = cp210x_get_fw_version(serial, CP210X_GET_FW_VER_2N);
+ if (ret)
+ break;
+ if (priv->fw_version <= 0x10004)
+ priv->no_flow_control = true;
+ break;
+ default:
+ break;
+ }
+}
+
static int cp210x_attach(struct usb_serial *serial)
{
int result;
@@ -1765,17 +2167,9 @@ static int cp210x_attach(struct usb_serial *serial)
if (!priv)
return -ENOMEM;
- result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
- CP210X_GET_PARTNUM, &priv->partnum,
- sizeof(priv->partnum));
- if (result < 0) {
- dev_warn(&serial->interface->dev,
- "querying part number failed\n");
- priv->partnum = CP210X_PARTNUM_UNKNOWN;
- }
-
usb_set_serial_data(serial, priv);
+ cp210x_determine_type(serial);
cp210x_init_max_speed(serial);
result = cp210x_gpio_init(serial);
generated by cgit (git 2.34.1) at 2025-12-25 01:45:05 +0000