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freebsd-dev/sys/dev/usb/serial/umcs.c
Ian Lepore ab3249b590 Translate modem status reg bits from ns16550 to SER_* values used by the 
tty layer.  Also, the line status reg bits are already ns16550 as expected
by the ucom layer, so no need for translation or a local var to hold them.
2016-07-26 23:27:28 +00:00

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/*-
* Copyright (c) 2010 Lev Serebryakov <lev@FreeBSD.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* This driver supports several multiport USB-to-RS232 serial adapters driven
* by MosChip mos7820 and mos7840, bridge chips.
* The adapters are sold under many different brand names.
*
* Datasheets are available at MosChip www site at
* http://www.moschip.com. The datasheets don't contain full
* programming information for the chip.
*
* It is nornal to have only two enabled ports in devices, based on
* quad-port mos7840.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/stdint.h>
#include <sys/stddef.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/linker_set.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/sx.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/priv.h>
#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usb_cdc.h>
#include "usbdevs.h"
#define USB_DEBUG_VAR umcs_debug
#include <dev/usb/usb_debug.h>
#include <dev/usb/usb_process.h>
#include <dev/usb/serial/usb_serial.h>
#include <dev/usb/serial/umcs.h>
#define UMCS7840_MODVER 1
#ifdef USB_DEBUG
static int umcs_debug = 0;
static SYSCTL_NODE(_hw_usb, OID_AUTO, umcs, CTLFLAG_RW, 0, "USB umcs quadport serial adapter");
SYSCTL_INT(_hw_usb_umcs, OID_AUTO, debug, CTLFLAG_RWTUN, &umcs_debug, 0, "Debug level");
#endif /* USB_DEBUG */
/*
* Two-port devices (both with 7820 chip and 7840 chip configured as two-port)
* have ports 0 and 2, with ports 1 and 3 omitted.
* So,PHYSICAL port numbers (indexes) on two-port device will be 0 and 2.
* This driver trys to use physical numbers as much as possible.
*/
/*
* Indexed by PHYSICAL port number.
* Pack non-regular registers to array to easier if-less access.
*/
struct umcs7840_port_registers {
uint8_t reg_sp; /* SP register. */
uint8_t reg_control; /* CONTROL register. */
uint8_t reg_dcr; /* DCR0 register. DCR1 & DCR2 can be
* calculated */
};
static const struct umcs7840_port_registers umcs7840_port_registers[UMCS7840_MAX_PORTS] = {
{.reg_sp = MCS7840_DEV_REG_SP1,.reg_control = MCS7840_DEV_REG_CONTROL1,.reg_dcr = MCS7840_DEV_REG_DCR0_1},
{.reg_sp = MCS7840_DEV_REG_SP2,.reg_control = MCS7840_DEV_REG_CONTROL2,.reg_dcr = MCS7840_DEV_REG_DCR0_2},
{.reg_sp = MCS7840_DEV_REG_SP3,.reg_control = MCS7840_DEV_REG_CONTROL3,.reg_dcr = MCS7840_DEV_REG_DCR0_3},
{.reg_sp = MCS7840_DEV_REG_SP4,.reg_control = MCS7840_DEV_REG_CONTROL4,.reg_dcr = MCS7840_DEV_REG_DCR0_4},
};
enum {
UMCS7840_BULK_RD_EP,
UMCS7840_BULK_WR_EP,
UMCS7840_N_TRANSFERS
};
struct umcs7840_softc_oneport {
struct usb_xfer *sc_xfer[UMCS7840_N_TRANSFERS]; /* Control structures
* for two transfers */
uint8_t sc_lcr; /* local line control register */
uint8_t sc_mcr; /* local modem control register */
};
struct umcs7840_softc {
struct ucom_super_softc sc_super_ucom;
struct ucom_softc sc_ucom[UMCS7840_MAX_PORTS]; /* Need to be continuous
* array, so indexed by
* LOGICAL port
* (subunit) number */
struct usb_xfer *sc_intr_xfer; /* Interrupt endpoint */
device_t sc_dev; /* Device for error prints */
struct usb_device *sc_udev; /* USB Device for all operations */
struct mtx sc_mtx; /* ucom requires this */
uint8_t sc_driver_done; /* Flag when enumeration is finished */
uint8_t sc_numports; /* Number of ports (subunits) */
struct umcs7840_softc_oneport sc_ports[UMCS7840_MAX_PORTS]; /* Indexed by PHYSICAL
* port number. */
};
/* prototypes */
static usb_error_t umcs7840_get_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t *);
static usb_error_t umcs7840_set_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t);
static usb_error_t umcs7840_get_UART_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t, uint8_t *);
static usb_error_t umcs7840_set_UART_reg_sync(struct umcs7840_softc *, uint8_t, uint8_t, uint8_t);
static usb_error_t umcs7840_set_baudrate(struct umcs7840_softc *, uint8_t, uint32_t);
static usb_error_t umcs7840_calc_baudrate(uint32_t rate, uint16_t *, uint8_t *);
static void umcs7840_free(struct ucom_softc *);
static void umcs7840_cfg_get_status(struct ucom_softc *, uint8_t *, uint8_t *);
static void umcs7840_cfg_set_dtr(struct ucom_softc *, uint8_t);
static void umcs7840_cfg_set_rts(struct ucom_softc *, uint8_t);
static void umcs7840_cfg_set_break(struct ucom_softc *, uint8_t);
static void umcs7840_cfg_param(struct ucom_softc *, struct termios *);
static void umcs7840_cfg_open(struct ucom_softc *);
static void umcs7840_cfg_close(struct ucom_softc *);
static int umcs7840_pre_param(struct ucom_softc *, struct termios *);
static void umcs7840_start_read(struct ucom_softc *);
static void umcs7840_stop_read(struct ucom_softc *);
static void umcs7840_start_write(struct ucom_softc *);
static void umcs7840_stop_write(struct ucom_softc *);
static void umcs7840_poll(struct ucom_softc *ucom);
static device_probe_t umcs7840_probe;
static device_attach_t umcs7840_attach;
static device_detach_t umcs7840_detach;
static void umcs7840_free_softc(struct umcs7840_softc *);
static usb_callback_t umcs7840_intr_callback;
static usb_callback_t umcs7840_read_callback1;
static usb_callback_t umcs7840_read_callback2;
static usb_callback_t umcs7840_read_callback3;
static usb_callback_t umcs7840_read_callback4;
static usb_callback_t umcs7840_write_callback1;
static usb_callback_t umcs7840_write_callback2;
static usb_callback_t umcs7840_write_callback3;
static usb_callback_t umcs7840_write_callback4;
static void umcs7840_read_callbackN(struct usb_xfer *, usb_error_t, uint8_t);
static void umcs7840_write_callbackN(struct usb_xfer *, usb_error_t, uint8_t);
/* Indexed by LOGICAL port number (subunit), so two-port device uses 0 & 1 */
static usb_callback_t *umcs7840_rw_callbacks[UMCS7840_MAX_PORTS][UMCS7840_N_TRANSFERS] = {
{&umcs7840_read_callback1, &umcs7840_write_callback1},
{&umcs7840_read_callback2, &umcs7840_write_callback2},
{&umcs7840_read_callback3, &umcs7840_write_callback3},
{&umcs7840_read_callback4, &umcs7840_write_callback4},
};
static const struct usb_config umcs7840_bulk_config_data[UMCS7840_N_TRANSFERS] = {
[UMCS7840_BULK_RD_EP] = {
.type = UE_BULK,
.endpoint = 0x01,
.direction = UE_DIR_IN,
.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
.bufsize = 0, /* use wMaxPacketSize */
.callback = &umcs7840_read_callback1,
.if_index = 0,
},
[UMCS7840_BULK_WR_EP] = {
.type = UE_BULK,
.endpoint = 0x02,
.direction = UE_DIR_OUT,
.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
.bufsize = 0, /* use wMaxPacketSize */
.callback = &umcs7840_write_callback1,
.if_index = 0,
},
};
static const struct usb_config umcs7840_intr_config_data[1] = {
[0] = {
.type = UE_INTERRUPT,
.endpoint = 0x09,
.direction = UE_DIR_IN,
.flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
.bufsize = 0, /* use wMaxPacketSize */
.callback = &umcs7840_intr_callback,
.if_index = 0,
},
};
static struct ucom_callback umcs7840_callback = {
.ucom_cfg_get_status = &umcs7840_cfg_get_status,
.ucom_cfg_set_dtr = &umcs7840_cfg_set_dtr,
.ucom_cfg_set_rts = &umcs7840_cfg_set_rts,
.ucom_cfg_set_break = &umcs7840_cfg_set_break,
.ucom_cfg_param = &umcs7840_cfg_param,
.ucom_cfg_open = &umcs7840_cfg_open,
.ucom_cfg_close = &umcs7840_cfg_close,
.ucom_pre_param = &umcs7840_pre_param,
.ucom_start_read = &umcs7840_start_read,
.ucom_stop_read = &umcs7840_stop_read,
.ucom_start_write = &umcs7840_start_write,
.ucom_stop_write = &umcs7840_stop_write,
.ucom_poll = &umcs7840_poll,
.ucom_free = &umcs7840_free,
};
static const STRUCT_USB_HOST_ID umcs7840_devs[] = {
{USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7820, 0)},
{USB_VPI(USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7840, 0)},
};
static device_method_t umcs7840_methods[] = {
DEVMETHOD(device_probe, umcs7840_probe),
DEVMETHOD(device_attach, umcs7840_attach),
DEVMETHOD(device_detach, umcs7840_detach),
DEVMETHOD_END
};
static devclass_t umcs7840_devclass;
static driver_t umcs7840_driver = {
.name = "umcs7840",
.methods = umcs7840_methods,
.size = sizeof(struct umcs7840_softc),
};
DRIVER_MODULE(umcs7840, uhub, umcs7840_driver, umcs7840_devclass, 0, 0);
MODULE_DEPEND(umcs7840, ucom, 1, 1, 1);
MODULE_DEPEND(umcs7840, usb, 1, 1, 1);
MODULE_VERSION(umcs7840, UMCS7840_MODVER);
USB_PNP_HOST_INFO(umcs7840_devs);
static int
umcs7840_probe(device_t dev)
{
struct usb_attach_arg *uaa = device_get_ivars(dev);
if (uaa->usb_mode != USB_MODE_HOST)
return (ENXIO);
if (uaa->info.bConfigIndex != MCS7840_CONFIG_INDEX)
return (ENXIO);
if (uaa->info.bIfaceIndex != MCS7840_IFACE_INDEX)
return (ENXIO);
return (usbd_lookup_id_by_uaa(umcs7840_devs, sizeof(umcs7840_devs), uaa));
}
static int
umcs7840_attach(device_t dev)
{
struct usb_config umcs7840_config_tmp[UMCS7840_N_TRANSFERS];
struct usb_attach_arg *uaa = device_get_ivars(dev);
struct umcs7840_softc *sc = device_get_softc(dev);
uint8_t iface_index = MCS7840_IFACE_INDEX;
int error;
int subunit;
int n;
uint8_t data;
for (n = 0; n < UMCS7840_N_TRANSFERS; ++n)
umcs7840_config_tmp[n] = umcs7840_bulk_config_data[n];
device_set_usb_desc(dev);
mtx_init(&sc->sc_mtx, "umcs7840", NULL, MTX_DEF);
ucom_ref(&sc->sc_super_ucom);
sc->sc_dev = dev;
sc->sc_udev = uaa->device;
/*
* Get number of ports
* Documentation (full datasheet) says, that number of ports is
* set as MCS7840_DEV_MODE_SELECT24S bit in MODE R/Only
* register. But vendor driver uses these undocumented
* register & bit.
*
* Experiments show, that MODE register can have `0'
* (4 ports) bit on 2-port device, so use vendor driver's way.
*
* Also, see notes in header file for these constants.
*/
umcs7840_get_reg_sync(sc, MCS7840_DEV_REG_GPIO, &data);
if (data & MCS7840_DEV_GPIO_4PORTS) {
sc->sc_numports = 4;
/* Store physical port numbers in sc_portno */
sc->sc_ucom[0].sc_portno = 0;
sc->sc_ucom[1].sc_portno = 1;
sc->sc_ucom[2].sc_portno = 2;
sc->sc_ucom[3].sc_portno = 3;
} else {
sc->sc_numports = 2;
/* Store physical port numbers in sc_portno */
sc->sc_ucom[0].sc_portno = 0;
sc->sc_ucom[1].sc_portno = 2; /* '1' is skipped */
}
device_printf(dev, "Chip mcs%04x, found %d active ports\n", uaa->info.idProduct, sc->sc_numports);
if (!umcs7840_get_reg_sync(sc, MCS7840_DEV_REG_MODE, &data)) {
device_printf(dev, "On-die confguration: RST: active %s, HRD: %s, PLL: %s, POR: %s, Ports: %s, EEPROM write %s, IrDA is %savailable\n",
(data & MCS7840_DEV_MODE_RESET) ? "low" : "high",
(data & MCS7840_DEV_MODE_SER_PRSNT) ? "yes" : "no",
(data & MCS7840_DEV_MODE_PLLBYPASS) ? "bypassed" : "avail",
(data & MCS7840_DEV_MODE_PORBYPASS) ? "bypassed" : "avail",
(data & MCS7840_DEV_MODE_SELECT24S) ? "2" : "4",
(data & MCS7840_DEV_MODE_EEPROMWR) ? "enabled" : "disabled",
(data & MCS7840_DEV_MODE_IRDA) ? "" : "not ");
}
/* Setup all transfers */
for (subunit = 0; subunit < sc->sc_numports; ++subunit) {
for (n = 0; n < UMCS7840_N_TRANSFERS; ++n) {
/* Set endpoint address */
umcs7840_config_tmp[n].endpoint = umcs7840_bulk_config_data[n].endpoint + 2 * sc->sc_ucom[subunit].sc_portno;
umcs7840_config_tmp[n].callback = umcs7840_rw_callbacks[subunit][n];
}
error = usbd_transfer_setup(uaa->device,
&iface_index, sc->sc_ports[sc->sc_ucom[subunit].sc_portno].sc_xfer, umcs7840_config_tmp,
UMCS7840_N_TRANSFERS, sc, &sc->sc_mtx);
if (error) {
device_printf(dev, "allocating USB transfers failed for subunit %d of %d\n",
subunit + 1, sc->sc_numports);
goto detach;
}
}
error = usbd_transfer_setup(uaa->device,
&iface_index, &sc->sc_intr_xfer, umcs7840_intr_config_data,
1, sc, &sc->sc_mtx);
if (error) {
device_printf(dev, "allocating USB transfers failed for interrupt\n");
goto detach;
}
/* clear stall at first run */
mtx_lock(&sc->sc_mtx);
for (subunit = 0; subunit < sc->sc_numports; ++subunit) {
usbd_xfer_set_stall(sc->sc_ports[sc->sc_ucom[subunit].sc_portno].sc_xfer[UMCS7840_BULK_RD_EP]);
usbd_xfer_set_stall(sc->sc_ports[sc->sc_ucom[subunit].sc_portno].sc_xfer[UMCS7840_BULK_WR_EP]);
}
mtx_unlock(&sc->sc_mtx);
error = ucom_attach(&sc->sc_super_ucom, sc->sc_ucom, sc->sc_numports, sc,
&umcs7840_callback, &sc->sc_mtx);
if (error)
goto detach;
ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
return (0);
detach:
umcs7840_detach(dev);
return (ENXIO);
}
static int
umcs7840_detach(device_t dev)
{
struct umcs7840_softc *sc = device_get_softc(dev);
int subunit;
ucom_detach(&sc->sc_super_ucom, sc->sc_ucom);
for (subunit = 0; subunit < sc->sc_numports; ++subunit)
usbd_transfer_unsetup(sc->sc_ports[sc->sc_ucom[subunit].sc_portno].sc_xfer, UMCS7840_N_TRANSFERS);
usbd_transfer_unsetup(&sc->sc_intr_xfer, 1);
device_claim_softc(dev);
umcs7840_free_softc(sc);
return (0);
}
UCOM_UNLOAD_DRAIN(umcs7840);
static void
umcs7840_free_softc(struct umcs7840_softc *sc)
{
if (ucom_unref(&sc->sc_super_ucom)) {
mtx_destroy(&sc->sc_mtx);
device_free_softc(sc);
}
}
static void
umcs7840_free(struct ucom_softc *ucom)
{
umcs7840_free_softc(ucom->sc_parent);
}
static void
umcs7840_cfg_open(struct ucom_softc *ucom)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint16_t pn = ucom->sc_portno;
uint8_t data;
/* If it very first open, finish global configuration */
if (!sc->sc_driver_done) {
/*
* USB enumeration is finished, pass internal memory to FIFOs
* If it is done in the end of "attach", kernel panics.
*/
if (umcs7840_get_reg_sync(sc, MCS7840_DEV_REG_CONTROL1, &data))
return;
data |= MCS7840_DEV_CONTROL1_DRIVER_DONE;
if (umcs7840_set_reg_sync(sc, MCS7840_DEV_REG_CONTROL1, data))
return;
sc->sc_driver_done = 1;
}
/* Toggle reset bit on-off */
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, &data))
return;
data |= MCS7840_DEV_SPx_UART_RESET;
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data))
return;
data &= ~MCS7840_DEV_SPx_UART_RESET;
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data))
return;
/* Set RS-232 mode */
if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_SCRATCHPAD, MCS7840_UART_SCRATCHPAD_RS232))
return;
/* Disable RX on time of initialization */
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_control, &data))
return;
data |= MCS7840_DEV_CONTROLx_RX_DISABLE;
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data))
return;
/* Disable all interrupts */
if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_IER, 0))
return;
/* Reset FIFO -- documented */
if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_FCR, 0))
return;
if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_FCR,
MCS7840_UART_FCR_ENABLE | MCS7840_UART_FCR_FLUSHRHR |
MCS7840_UART_FCR_FLUSHTHR | MCS7840_UART_FCR_RTL_1_14))
return;
/* Set 8 bit, no parity, 1 stop bit -- documented */
sc->sc_ports[pn].sc_lcr = MCS7840_UART_LCR_DATALEN8 | MCS7840_UART_LCR_STOPB1;
if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_LCR, sc->sc_ports[pn].sc_lcr))
return;
/*
* Enable DTR/RTS on modem control, enable modem interrupts --
* documented
*/
sc->sc_ports[pn].sc_mcr = MCS7840_UART_MCR_DTR | MCS7840_UART_MCR_RTS | MCS7840_UART_MCR_IE;
if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_mcr))
return;
/* Clearing Bulkin and Bulkout FIFO */
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, &data))
return;
data |= MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO;
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data))
return;
data &= ~(MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO);
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_sp, data))
return;
/* Set speed 9600 */
if (umcs7840_set_baudrate(sc, pn, 9600))
return;
/* Finally enable all interrupts -- documented */
/*
* Copied from vendor driver, I don't know why we should read LCR
* here
*/
if (umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_LCR, &sc->sc_ports[pn].sc_lcr))
return;
if (umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_IER,
MCS7840_UART_IER_RXSTAT | MCS7840_UART_IER_MODEM))
return;
/* Enable RX */
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_control, &data))
return;
data &= ~MCS7840_DEV_CONTROLx_RX_DISABLE;
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data))
return;
DPRINTF("Port %d has been opened\n", pn);
}
static void
umcs7840_cfg_close(struct ucom_softc *ucom)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint16_t pn = ucom->sc_portno;
uint8_t data;
umcs7840_stop_read(ucom);
umcs7840_stop_write(ucom);
umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, 0);
umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_IER, 0);
/* Disable RX */
if (umcs7840_get_reg_sync(sc, umcs7840_port_registers[pn].reg_control, &data))
return;
data |= MCS7840_DEV_CONTROLx_RX_DISABLE;
if (umcs7840_set_reg_sync(sc, umcs7840_port_registers[pn].reg_control, data))
return;
DPRINTF("Port %d has been closed\n", pn);
}
static void
umcs7840_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint8_t pn = ucom->sc_portno;
if (onoff)
sc->sc_ports[pn].sc_mcr |= MCS7840_UART_MCR_DTR;
else
sc->sc_ports[pn].sc_mcr &= ~MCS7840_UART_MCR_DTR;
umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_mcr);
DPRINTF("Port %d DTR set to: %s\n", pn, onoff ? "on" : "off");
}
static void
umcs7840_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint8_t pn = ucom->sc_portno;
if (onoff)
sc->sc_ports[pn].sc_mcr |= MCS7840_UART_MCR_RTS;
else
sc->sc_ports[pn].sc_mcr &= ~MCS7840_UART_MCR_RTS;
umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_mcr);
DPRINTF("Port %d RTS set to: %s\n", pn, onoff ? "on" : "off");
}
static void
umcs7840_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint8_t pn = ucom->sc_portno;
if (onoff)
sc->sc_ports[pn].sc_lcr |= MCS7840_UART_LCR_BREAK;
else
sc->sc_ports[pn].sc_lcr &= ~MCS7840_UART_LCR_BREAK;
umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_LCR, sc->sc_ports[pn].sc_lcr);
DPRINTF("Port %d BREAK set to: %s\n", pn, onoff ? "on" : "off");
}
static void
umcs7840_cfg_param(struct ucom_softc *ucom, struct termios *t)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint8_t pn = ucom->sc_portno;
uint8_t lcr = sc->sc_ports[pn].sc_lcr;
uint8_t mcr = sc->sc_ports[pn].sc_mcr;
DPRINTF("Port %d config:\n", pn);
if (t->c_cflag & CSTOPB) {
DPRINTF(" 2 stop bits\n");
lcr |= MCS7840_UART_LCR_STOPB2;
} else {
lcr |= MCS7840_UART_LCR_STOPB1;
DPRINTF(" 1 stop bit\n");
}
lcr &= ~MCS7840_UART_LCR_PARITYMASK;
if (t->c_cflag & PARENB) {
lcr |= MCS7840_UART_LCR_PARITYON;
if (t->c_cflag & PARODD) {
lcr = MCS7840_UART_LCR_PARITYODD;
DPRINTF(" parity on - odd\n");
} else {
lcr = MCS7840_UART_LCR_PARITYEVEN;
DPRINTF(" parity on - even\n");
}
} else {
lcr &= ~MCS7840_UART_LCR_PARITYON;
DPRINTF(" parity off\n");
}
lcr &= ~MCS7840_UART_LCR_DATALENMASK;
switch (t->c_cflag & CSIZE) {
case CS5:
lcr |= MCS7840_UART_LCR_DATALEN5;
DPRINTF(" 5 bit\n");
break;
case CS6:
lcr |= MCS7840_UART_LCR_DATALEN6;
DPRINTF(" 6 bit\n");
break;
case CS7:
lcr |= MCS7840_UART_LCR_DATALEN7;
DPRINTF(" 7 bit\n");
break;
case CS8:
lcr |= MCS7840_UART_LCR_DATALEN8;
DPRINTF(" 8 bit\n");
break;
}
if (t->c_cflag & CRTSCTS) {
mcr |= MCS7840_UART_MCR_CTSRTS;
DPRINTF(" CTS/RTS\n");
} else
mcr &= ~MCS7840_UART_MCR_CTSRTS;
if (t->c_cflag & (CDTR_IFLOW | CDSR_OFLOW)) {
mcr |= MCS7840_UART_MCR_DTRDSR;
DPRINTF(" DTR/DSR\n");
} else
mcr &= ~MCS7840_UART_MCR_DTRDSR;
sc->sc_ports[pn].sc_lcr = lcr;
umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_LCR, sc->sc_ports[pn].sc_lcr);
DPRINTF("Port %d LCR=%02x\n", pn, sc->sc_ports[pn].sc_lcr);
sc->sc_ports[pn].sc_mcr = mcr;
umcs7840_set_UART_reg_sync(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_mcr);
DPRINTF("Port %d MCR=%02x\n", pn, sc->sc_ports[pn].sc_mcr);
umcs7840_set_baudrate(sc, pn, t->c_ospeed);
}
static int
umcs7840_pre_param(struct ucom_softc *ucom, struct termios *t)
{
uint8_t clk;
uint16_t divisor;
if (umcs7840_calc_baudrate(t->c_ospeed, &divisor, &clk) || !divisor)
return (EINVAL);
return (0);
}
static void
umcs7840_start_read(struct ucom_softc *ucom)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint8_t pn = ucom->sc_portno;
/* Start interrupt transfer */
usbd_transfer_start(sc->sc_intr_xfer);
/* Start read transfer */
usbd_transfer_start(sc->sc_ports[pn].sc_xfer[UMCS7840_BULK_RD_EP]);
}
static void
umcs7840_stop_read(struct ucom_softc *ucom)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint8_t pn = ucom->sc_portno;
/* Stop read transfer */
usbd_transfer_stop(sc->sc_ports[pn].sc_xfer[UMCS7840_BULK_RD_EP]);
}
static void
umcs7840_start_write(struct ucom_softc *ucom)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint8_t pn = ucom->sc_portno;
/* Start interrupt transfer */
usbd_transfer_start(sc->sc_intr_xfer);
/* Start write transfer */
usbd_transfer_start(sc->sc_ports[pn].sc_xfer[UMCS7840_BULK_WR_EP]);
}
static void
umcs7840_stop_write(struct ucom_softc *ucom)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint8_t pn = ucom->sc_portno;
/* Stop write transfer */
usbd_transfer_stop(sc->sc_ports[pn].sc_xfer[UMCS7840_BULK_WR_EP]);
}
static void
umcs7840_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr)
{
struct umcs7840_softc *sc = ucom->sc_parent;
uint8_t pn = ucom->sc_portno;
uint8_t hw_msr = 0; /* local modem status register */
/*
* Read status registers. MSR bits need translation from ns16550 to
* SER_* values. LSR bits are ns16550 in hardware and ucom.
*/
umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_LSR, lsr);
umcs7840_get_UART_reg_sync(sc, pn, MCS7840_UART_REG_MSR, &hw_msr);
if (hw_msr & MCS7840_UART_MSR_NEGCTS)
*msr |= SER_CTS;
if (hw_msr & MCS7840_UART_MSR_NEGDCD)
*msr |= SER_DCD;
if (hw_msr & MCS7840_UART_MSR_NEGRI)
*msr |= SER_RI;
if (hw_msr & MCS7840_UART_MSR_NEGDSR)
*msr |= SER_DSR;
DPRINTF("Port %d status: LSR=%02x MSR=%02x\n", ucom->sc_portno, *lsr, *msr);
}
static void
umcs7840_intr_callback(struct usb_xfer *xfer, usb_error_t error)
{
struct umcs7840_softc *sc = usbd_xfer_softc(xfer);
struct usb_page_cache *pc;
uint8_t buf[13];
int actlen;
int subunit;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
if (actlen == 5 || actlen == 13) {
pc = usbd_xfer_get_frame(xfer, 0);
usbd_copy_out(pc, 0, buf, actlen);
/* Check status of all ports */
for (subunit = 0; subunit < sc->sc_numports; ++subunit) {
uint8_t pn = sc->sc_ucom[subunit].sc_portno;
if (buf[pn] & MCS7840_UART_ISR_NOPENDING)
continue;
DPRINTF("Port %d has pending interrupt: %02x (FIFO: %02x)\n", pn, buf[pn] & MCS7840_UART_ISR_INTMASK, buf[pn] & (~MCS7840_UART_ISR_INTMASK));
switch (buf[pn] & MCS7840_UART_ISR_INTMASK) {
case MCS7840_UART_ISR_RXERR:
case MCS7840_UART_ISR_RXHASDATA:
case MCS7840_UART_ISR_RXTIMEOUT:
case MCS7840_UART_ISR_MSCHANGE:
ucom_status_change(&sc->sc_ucom[subunit]);
break;
default:
/* Do nothing */
break;
}
}
} else
device_printf(sc->sc_dev, "Invalid interrupt data length %d", actlen);
/* FALLTHROUGH */
case USB_ST_SETUP:
tr_setup:
usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
usbd_transfer_submit(xfer);
return;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
return;
}
}
static void
umcs7840_read_callback1(struct usb_xfer *xfer, usb_error_t error)
{
umcs7840_read_callbackN(xfer, error, 0);
}
static void
umcs7840_read_callback2(struct usb_xfer *xfer, usb_error_t error)
{
umcs7840_read_callbackN(xfer, error, 1);
}
static void
umcs7840_read_callback3(struct usb_xfer *xfer, usb_error_t error)
{
umcs7840_read_callbackN(xfer, error, 2);
}
static void
umcs7840_read_callback4(struct usb_xfer *xfer, usb_error_t error)
{
umcs7840_read_callbackN(xfer, error, 3);
}
static void
umcs7840_read_callbackN(struct usb_xfer *xfer, usb_error_t error, uint8_t subunit)
{
struct umcs7840_softc *sc = usbd_xfer_softc(xfer);
struct ucom_softc *ucom = &sc->sc_ucom[subunit];
struct usb_page_cache *pc;
int actlen;
usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
DPRINTF("Port %d read, state = %d, data length = %d\n", ucom->sc_portno, USB_GET_STATE(xfer), actlen);
switch (USB_GET_STATE(xfer)) {
case USB_ST_TRANSFERRED:
pc = usbd_xfer_get_frame(xfer, 0);
ucom_put_data(ucom, pc, 0, actlen);
/* FALLTHROUGH */
case USB_ST_SETUP:
tr_setup:
usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
usbd_transfer_submit(xfer);
return;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
return;
}
}
static void
umcs7840_write_callback1(struct usb_xfer *xfer, usb_error_t error)
{
umcs7840_write_callbackN(xfer, error, 0);
}
static void
umcs7840_write_callback2(struct usb_xfer *xfer, usb_error_t error)
{
umcs7840_write_callbackN(xfer, error, 1);
}
static void
umcs7840_write_callback3(struct usb_xfer *xfer, usb_error_t error)
{
umcs7840_write_callbackN(xfer, error, 2);
}
static void
umcs7840_write_callback4(struct usb_xfer *xfer, usb_error_t error)
{
umcs7840_write_callbackN(xfer, error, 3);
}
static void
umcs7840_write_callbackN(struct usb_xfer *xfer, usb_error_t error, uint8_t subunit)
{
struct umcs7840_softc *sc = usbd_xfer_softc(xfer);
struct ucom_softc *ucom = &sc->sc_ucom[subunit];
struct usb_page_cache *pc;
uint32_t actlen;
DPRINTF("Port %d write, state = %d\n", ucom->sc_portno, USB_GET_STATE(xfer));
switch (USB_GET_STATE(xfer)) {
case USB_ST_SETUP:
case USB_ST_TRANSFERRED:
tr_setup:
pc = usbd_xfer_get_frame(xfer, 0);
if (ucom_get_data(ucom, pc, 0, usbd_xfer_max_len(xfer), &actlen)) {
DPRINTF("Port %d write, has %d bytes\n", ucom->sc_portno, actlen);
usbd_xfer_set_frame_len(xfer, 0, actlen);
usbd_transfer_submit(xfer);
}
return;
default: /* Error */
if (error != USB_ERR_CANCELLED) {
/* try to clear stall first */
usbd_xfer_set_stall(xfer);
goto tr_setup;
}
return;
}
}
static void
umcs7840_poll(struct ucom_softc *ucom)
{
struct umcs7840_softc *sc = ucom->sc_parent;
DPRINTF("Port %d poll\n", ucom->sc_portno);
usbd_transfer_poll(sc->sc_ports[ucom->sc_portno].sc_xfer, UMCS7840_N_TRANSFERS);
usbd_transfer_poll(&sc->sc_intr_xfer, 1);
}
static usb_error_t
umcs7840_get_reg_sync(struct umcs7840_softc *sc, uint8_t reg, uint8_t *data)
{
struct usb_device_request req;
usb_error_t err;
uint16_t len;
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = MCS7840_RDREQ;
USETW(req.wValue, 0);
USETW(req.wIndex, reg);
USETW(req.wLength, UMCS7840_READ_LENGTH);
err = usbd_do_request_proc(sc->sc_udev, &sc->sc_super_ucom.sc_tq, &req, (void *)data, 0, &len, UMCS7840_CTRL_TIMEOUT);
if (err == USB_ERR_NORMAL_COMPLETION && len != 1) {
device_printf(sc->sc_dev, "Reading register %d failed: invalid length %d\n", reg, len);
return (USB_ERR_INVAL);
} else if (err)
device_printf(sc->sc_dev, "Reading register %d failed: %s\n", reg, usbd_errstr(err));
return (err);
}
static usb_error_t
umcs7840_set_reg_sync(struct umcs7840_softc *sc, uint8_t reg, uint8_t data)
{
struct usb_device_request req;
usb_error_t err;
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = MCS7840_WRREQ;
USETW(req.wValue, data);
USETW(req.wIndex, reg);
USETW(req.wLength, 0);
err = usbd_do_request_proc(sc->sc_udev, &sc->sc_super_ucom.sc_tq, &req, NULL, 0, NULL, UMCS7840_CTRL_TIMEOUT);
if (err)
device_printf(sc->sc_dev, "Writing register %d failed: %s\n", reg, usbd_errstr(err));
return (err);
}
static usb_error_t
umcs7840_get_UART_reg_sync(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t *data)
{
struct usb_device_request req;
uint16_t wVal;
usb_error_t err;
uint16_t len;
/* portno is port number */
wVal = ((uint16_t)(portno + 1)) << 8;
req.bmRequestType = UT_READ_VENDOR_DEVICE;
req.bRequest = MCS7840_RDREQ;
USETW(req.wValue, wVal);
USETW(req.wIndex, reg);
USETW(req.wLength, UMCS7840_READ_LENGTH);
err = usbd_do_request_proc(sc->sc_udev, &sc->sc_super_ucom.sc_tq, &req, (void *)data, 0, &len, UMCS7840_CTRL_TIMEOUT);
if (err == USB_ERR_NORMAL_COMPLETION && len != 1) {
device_printf(sc->sc_dev, "Reading UART%d register %d failed: invalid length %d\n", portno, reg, len);
return (USB_ERR_INVAL);
} else if (err)
device_printf(sc->sc_dev, "Reading UART%d register %d failed: %s\n", portno, reg, usbd_errstr(err));
return (err);
}
static usb_error_t
umcs7840_set_UART_reg_sync(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data)
{
struct usb_device_request req;
usb_error_t err;
uint16_t wVal;
/* portno is port number */
wVal = ((uint16_t)(portno + 1)) << 8 | data;
req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
req.bRequest = MCS7840_WRREQ;
USETW(req.wValue, wVal);
USETW(req.wIndex, reg);
USETW(req.wLength, 0);
err = usbd_do_request_proc(sc->sc_udev, &sc->sc_super_ucom.sc_tq, &req, NULL, 0, NULL, UMCS7840_CTRL_TIMEOUT);
if (err)
device_printf(sc->sc_dev, "Writing UART%d register %d failed: %s\n", portno, reg, usbd_errstr(err));
return (err);
}
static usb_error_t
umcs7840_set_baudrate(struct umcs7840_softc *sc, uint8_t portno, uint32_t rate)
{
usb_error_t err;
uint16_t divisor;
uint8_t clk;
uint8_t data;
if (umcs7840_calc_baudrate(rate, &divisor, &clk)) {
DPRINTF("Port %d bad speed: %d\n", portno, rate);
return (-1);
}
if (divisor == 0 || (clk & MCS7840_DEV_SPx_CLOCK_MASK) != clk) {
DPRINTF("Port %d bad speed calculation: %d\n", portno, rate);
return (-1);
}
DPRINTF("Port %d set speed: %d (%02x / %d)\n", portno, rate, clk, divisor);
/* Set clock source for standard BAUD frequences */
err = umcs7840_get_reg_sync(sc, umcs7840_port_registers[portno].reg_sp, &data);
if (err)
return (err);
data &= MCS7840_DEV_SPx_CLOCK_MASK;
data |= clk;
err = umcs7840_set_reg_sync(sc, umcs7840_port_registers[portno].reg_sp, data);
if (err)
return (err);
/* Set divider */
sc->sc_ports[portno].sc_lcr |= MCS7840_UART_LCR_DIVISORS;
err = umcs7840_set_UART_reg_sync(sc, portno, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_lcr);
if (err)
return (err);
err = umcs7840_set_UART_reg_sync(sc, portno, MCS7840_UART_REG_DLL, (uint8_t)(divisor & 0xff));
if (err)
return (err);
err = umcs7840_set_UART_reg_sync(sc, portno, MCS7840_UART_REG_DLM, (uint8_t)((divisor >> 8) & 0xff));
if (err)
return (err);
/* Turn off access to DLL/DLM registers of UART */
sc->sc_ports[portno].sc_lcr &= ~MCS7840_UART_LCR_DIVISORS;
err = umcs7840_set_UART_reg_sync(sc, portno, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_lcr);
if (err)
return (err);
return (0);
}
/* Maximum speeds for standard frequences, when PLL is not used */
static const uint32_t umcs7840_baudrate_divisors[] = {0, 115200, 230400, 403200, 460800, 806400, 921600, 1572864, 3145728,};
static const uint8_t umcs7840_baudrate_divisors_len = nitems(umcs7840_baudrate_divisors);
static usb_error_t
umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk)
{
uint8_t i = 0;
if (rate > umcs7840_baudrate_divisors[umcs7840_baudrate_divisors_len - 1])
return (-1);
for (i = 0; i < umcs7840_baudrate_divisors_len - 1 &&
!(rate > umcs7840_baudrate_divisors[i] && rate <= umcs7840_baudrate_divisors[i + 1]); ++i);
if (rate == 0)
*divisor = 1; /* XXX */
else
*divisor = umcs7840_baudrate_divisors[i + 1] / rate;
/* 0x00 .. 0x70 */
*clk = i << MCS7840_DEV_SPx_CLOCK_SHIFT;
return (0);
}
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