/* $NetBSD: umcs.c,v 1.7.6.1 2014/08/31 17:18:15 riz Exp $ */ /* $FreeBSD: head/sys/dev/usb/serial/umcs.c 260559 2014-01-12 11:44:28Z hselasky $ */ /*- * Copyright (c) 2010 Lev Serebryakov . * 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 __KERNEL_RCSID(0, "$NetBSD: umcs.c,v 1.7.6.1 2014/08/31 17:18:15 riz Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "umcs.h" #if 0 #define DPRINTF(ARG) printf ARG #else #define DPRINTF(ARG) #endif /* * 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 on two-port device will be 0 and 2. * * We use an array of the following struct, indexed by ucom port index, * and include the physical port number in it. */ struct umcs7840_softc_oneport { device_t sc_port_ucom; /* ucom subdevice */ unsigned int sc_port_phys; /* physical port number */ uint8_t sc_port_lcr; /* local line control register */ uint8_t sc_port_mcr; /* local modem control register */ }; struct umcs7840_softc { device_t sc_dev; /* ourself */ usbd_interface_handle sc_iface; /* the usb interface */ usbd_device_handle sc_udev; /* the usb device */ usbd_pipe_handle sc_intr_pipe; /* interrupt pipe */ uint8_t *sc_intr_buf; /* buffer for interrupt xfer */ unsigned int sc_intr_buflen; /* size of buffer */ struct usb_task sc_change_task; /* async status changes */ volatile uint32_t sc_change_mask; /* mask of port changes */ struct umcs7840_softc_oneport sc_ports[UMCS7840_MAX_PORTS]; /* data for each port */ uint8_t sc_numports; /* number of ports (subunits) */ bool sc_init_done; /* special one time init in open */ bool sc_dying; /* we have been deactivated */ }; static int umcs7840_get_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t *data); static int umcs7840_set_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t data); static int umcs7840_get_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t *data); static int umcs7840_set_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data); static int umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk); static void umcs7840_dtr(struct umcs7840_softc *sc, int portno, bool onoff); static void umcs7840_rts(struct umcs7840_softc *sc, int portno, bool onoff); static void umcs7840_break(struct umcs7840_softc *sc, int portno, bool onoff); static int umcs7840_match(device_t, cfdata_t, void *); static void umcs7840_attach(device_t, device_t, void *); static int umcs7840_detach(device_t, int); static void umcs7840_intr(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status); static void umcs7840_change_task(void *arg); static int umcs7840_activate(device_t, enum devact); static void umcs7840_childdet(device_t, device_t); static void umcs7840_get_status(void *, int, u_char *, u_char *); static void umcs7840_set(void *, int, int, int); static int umcs7840_param(void *, int, struct termios *); static int umcs7840_port_open(void *sc, int portno); static void umcs7840_port_close(void *sc, int portno); struct ucom_methods umcs7840_methods = { .ucom_get_status = umcs7840_get_status, .ucom_set = umcs7840_set, .ucom_param = umcs7840_param, .ucom_open = umcs7840_port_open, .ucom_close = umcs7840_port_close, }; static const struct usb_devno umcs7840_devs[] = { { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7703 }, { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7810 }, { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7820 }, { USB_VENDOR_MOSCHIP, USB_PRODUCT_MOSCHIP_MCS7840 }, { USB_VENDOR_ATEN, USB_PRODUCT_ATEN_UC2324 } }; #define umcs7840_lookup(v, p) usb_lookup(umcs7840_devs, v, p) CFATTACH_DECL2_NEW(umcs, sizeof(struct umcs7840_softc), umcs7840_match, umcs7840_attach, umcs7840_detach, umcs7840_activate, NULL, umcs7840_childdet); static inline int umcs7840_reg_sp(int phyport) { KASSERT(phyport >= 0 && phyport < 4); switch (phyport) { default: case 0: return MCS7840_DEV_REG_SP1; case 1: return MCS7840_DEV_REG_SP2; case 2: return MCS7840_DEV_REG_SP3; case 3: return MCS7840_DEV_REG_SP4; } } static inline int umcs7840_reg_ctrl(int phyport) { KASSERT(phyport >= 0 && phyport < 4); switch (phyport) { default: case 0: return MCS7840_DEV_REG_CONTROL1; case 1: return MCS7840_DEV_REG_CONTROL2; case 2: return MCS7840_DEV_REG_CONTROL3; case 3: return MCS7840_DEV_REG_CONTROL4; } } static int umcs7840_match(device_t dev, cfdata_t match, void *aux) { struct usb_attach_arg *uaa = aux; return (umcs7840_lookup(uaa->vendor, uaa->product) != NULL ? UMATCH_VENDOR_PRODUCT : UMATCH_NONE); } static void umcs7840_attach(device_t parent, device_t self, void * aux) { struct umcs7840_softc *sc = device_private(self); struct usb_attach_arg *uaa = aux; usbd_device_handle dev = uaa->device; usb_interface_descriptor_t *id; usb_endpoint_descriptor_t *ed; char *devinfop; struct ucom_attach_args uca; int error, i, intr_addr; uint8_t data; sc->sc_dev = self; sc->sc_udev = uaa->device; if (usbd_set_config_index(sc->sc_udev, MCS7840_CONFIG_INDEX, 1) != 0) { aprint_error(": could not set configuration no\n"); return; } /* get the first interface handle */ error = usbd_device2interface_handle(sc->sc_udev, MCS7840_IFACE_INDEX, &sc->sc_iface); if (error != 0) { aprint_error(": could not get interface handle\n"); return; } /* * 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(sc, MCS7840_DEV_REG_GPIO, &data); if (data & MCS7840_DEV_GPIO_4PORTS) { sc->sc_numports = 4; /* physical port no are : 0, 1, 2, 3 */ } else { if (uaa->product == USB_PRODUCT_MOSCHIP_MCS7810) sc->sc_numports = 1; else { sc->sc_numports = 2; /* physical port no are : 0 and 2 */ } } devinfop = usbd_devinfo_alloc(dev, 0); aprint_normal(": %s\n", devinfop); usbd_devinfo_free(devinfop); aprint_verbose_dev(self, "found %d active ports\n", sc->sc_numports); if (!umcs7840_get_reg(sc, MCS7840_DEV_REG_MODE, &data)) { aprint_verbose_dev(self, "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 "); } /* * Set up the interrupt pipe */ id = usbd_get_interface_descriptor(sc->sc_iface); intr_addr = -1; for (i = 0 ; i < id->bNumEndpoints ; i++) { ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); if (ed == NULL) continue; if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN || UE_GET_XFERTYPE(ed->bmAttributes) != UE_INTERRUPT) continue; sc->sc_intr_buflen = UGETW(ed->wMaxPacketSize); intr_addr = ed->bEndpointAddress; break; } if (intr_addr < 0) { aprint_error_dev(self, "interrupt pipe not found\n"); return; } sc->sc_intr_buf = kmem_alloc(sc->sc_intr_buflen, KM_SLEEP); error = usbd_open_pipe_intr(sc->sc_iface, intr_addr, USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buf, sc->sc_intr_buflen, umcs7840_intr, 100); if (error) { aprint_error_dev(self, "cannot open interrupt pipe " "(addr %d)\n", intr_addr); return; } usb_init_task(&sc->sc_change_task, umcs7840_change_task, sc, USB_TASKQ_MPSAFE); usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); memset(&uca, 0, sizeof uca); uca.ibufsize = 256; uca.obufsize = 256; uca.ibufsizepad = 256; uca.opkthdrlen = 0; uca.device = sc->sc_udev; uca.iface = sc->sc_iface; uca.methods = &umcs7840_methods; uca.arg = sc; for (i = 0; i < sc->sc_numports; i++) { uca.bulkin = uca.bulkout = -1; /* * On four port cards, endpoints are 0/1 for first, * 2/3 for second, ... * On two port cards, they are 0/1 for first, 4/5 for second. * On single port, just 0/1 will be used. */ int phyport = i * (sc->sc_numports == 2 ? 2 : 1); ed = usbd_interface2endpoint_descriptor(sc->sc_iface, phyport*2); if (ed == NULL) { aprint_error_dev(self, "no bulk in endpoint found for %d\n", i); return; } uca.bulkin = ed->bEndpointAddress; ed = usbd_interface2endpoint_descriptor(sc->sc_iface, phyport*2 + 1); if (ed == NULL) { aprint_error_dev(self, "no bulk out endpoint found for %d\n", i); return; } uca.bulkout = ed->bEndpointAddress; uca.portno = i; DPRINTF(("port %d physical port %d bulk-in %d bulk-out %d\n", i, phyport, uca.bulkin, uca.bulkout)); sc->sc_ports[i].sc_port_phys = phyport; sc->sc_ports[i].sc_port_ucom = config_found_sm_loc(self, "ucombus", NULL, &uca, ucomprint, ucomsubmatch); } } static int umcs7840_get_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t *data) { usb_device_request_t req; int err; 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(sc->sc_udev, &req, data); if (err) aprint_normal_dev(sc->sc_dev, "Reading register %d failed: %s\n", reg, usbd_errstr(err)); return err; } static int umcs7840_set_reg(struct umcs7840_softc *sc, uint8_t reg, uint8_t data) { usb_device_request_t req; int 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(sc->sc_udev, &req, 0); if (err) aprint_normal_dev(sc->sc_dev, "Writing register %d failed: %s\n", reg, usbd_errstr(err)); return err; } static int umcs7840_get_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t *data) { usb_device_request_t req; uint16_t wVal; int err; /* 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(sc->sc_udev, &req, data); if (err) aprint_normal_dev(sc->sc_dev, "Reading UART %d register %d failed: %s\n", portno, reg, usbd_errstr(err)); return err; } static int umcs7840_set_UART_reg(struct umcs7840_softc *sc, uint8_t portno, uint8_t reg, uint8_t data) { usb_device_request_t req; int err; uint16_t wVal; /* portno is the physical 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(sc->sc_udev, &req, NULL); if (err) aprint_error_dev(sc->sc_dev, "Writing UART %d register %d failed: %s\n", portno, reg, usbd_errstr(err)); return err; } static int umcs7840_set_baudrate(struct umcs7840_softc *sc, uint8_t portno, uint32_t rate) { int err; uint16_t divisor; uint8_t clk; uint8_t data; uint8_t physport = sc->sc_ports[portno].sc_port_phys; int spreg = umcs7840_reg_sp(physport); 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(sc, spreg, &data); if (err) return err; data &= MCS7840_DEV_SPx_CLOCK_MASK; data |= clk; err = umcs7840_set_reg(sc, spreg, data); if (err) return err; /* Set divider */ sc->sc_ports[portno].sc_port_lcr |= MCS7840_UART_LCR_DIVISORS; err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); if (err) return err; err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_DLL, (uint8_t)(divisor & 0xff)); if (err) return err; err = umcs7840_set_UART_reg(sc, physport, 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_port_lcr &= ~MCS7840_UART_LCR_DIVISORS; err = umcs7840_set_UART_reg(sc, physport, MCS7840_UART_REG_LCR, sc->sc_ports[portno].sc_port_lcr); if (err) return err; return (0); } static int umcs7840_calc_baudrate(uint32_t rate, uint16_t *divisor, uint8_t *clk) { /* 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 = __arraycount(umcs7840_baudrate_divisors); 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); *divisor = umcs7840_baudrate_divisors[i + 1] / rate; /* 0x00 .. 0x70 */ *clk = i << MCS7840_DEV_SPx_CLOCK_SHIFT; return (0); } static int umcs7840_detach(device_t self, int flags) { struct umcs7840_softc *sc = device_private(self); int rv = 0, i; sc->sc_dying = true; /* close interrupt pipe */ if (sc->sc_intr_pipe != NULL) { rv = usbd_abort_pipe(sc->sc_intr_pipe); if (rv) aprint_error_dev(sc->sc_dev, "abort interrupt pipe failed: %s\n", usbd_errstr(rv)); rv = usbd_close_pipe(sc->sc_intr_pipe); if (rv) aprint_error_dev(sc->sc_dev, "failed to close interrupt pipe: %s\n", usbd_errstr(rv)); kmem_free(sc->sc_intr_buf, sc->sc_intr_buflen); sc->sc_intr_pipe = NULL; } usb_rem_task(sc->sc_udev, &sc->sc_change_task); /* detach children */ for (i = 0; i < sc->sc_numports; i++) { if (sc->sc_ports[i].sc_port_ucom) { rv = config_detach(sc->sc_ports[i].sc_port_ucom, flags); if (rv) break; } } usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); return rv; } int umcs7840_activate(device_t self, enum devact act) { struct umcs7840_softc *sc = device_private(self); switch (act) { case DVACT_DEACTIVATE: sc->sc_dying = true; return 0; default: return EOPNOTSUPP; } } static void umcs7840_childdet(device_t self, device_t child) { struct umcs7840_softc *sc = device_private(self); int i; for (i = 0; i < sc->sc_numports; i++) { if (child == sc->sc_ports[i].sc_port_ucom) { sc->sc_ports[i].sc_port_ucom = NULL; return; } } } static void umcs7840_get_status(void *self, int portno, u_char *lsr, u_char *msr) { struct umcs7840_softc *sc = self; uint8_t pn = sc->sc_ports[portno].sc_port_phys; uint8_t hw_lsr = 0; /* local line status register */ uint8_t hw_msr = 0; /* local modem status register */ if (sc->sc_dying) return; /* Read LSR & MSR */ umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LSR, &hw_lsr); umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_MSR, &hw_msr); *lsr = hw_lsr; *msr = hw_msr; } static void umcs7840_set(void *self, int portno, int reg, int onoff) { struct umcs7840_softc *sc = self; if (sc->sc_dying) return; switch (reg) { case UCOM_SET_DTR: umcs7840_dtr(sc, portno, onoff); break; case UCOM_SET_RTS: umcs7840_rts(sc, portno, onoff); break; case UCOM_SET_BREAK: umcs7840_break(sc, portno, onoff); break; default: break; } } static int umcs7840_param(void *self, int portno, struct termios *t) { struct umcs7840_softc *sc = self; int pn = sc->sc_ports[portno].sc_port_phys; uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; if (t->c_cflag & CSTOPB) { lcr |= MCS7840_UART_LCR_STOPB2; } else { lcr |= MCS7840_UART_LCR_STOPB1; } 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; } else { lcr = MCS7840_UART_LCR_PARITYEVEN; } } else { lcr &= ~MCS7840_UART_LCR_PARITYON; } lcr &= ~MCS7840_UART_LCR_DATALENMASK; switch (t->c_cflag & CSIZE) { case CS5: lcr |= MCS7840_UART_LCR_DATALEN5; break; case CS6: lcr |= MCS7840_UART_LCR_DATALEN6; break; case CS7: lcr |= MCS7840_UART_LCR_DATALEN7; break; case CS8: lcr |= MCS7840_UART_LCR_DATALEN8; break; } if (t->c_cflag & CRTSCTS) mcr |= MCS7840_UART_MCR_CTSRTS; else mcr &= ~MCS7840_UART_MCR_CTSRTS; if (t->c_cflag & CLOCAL) mcr &= ~MCS7840_UART_MCR_DTRDSR; else mcr |= MCS7840_UART_MCR_DTRDSR; sc->sc_ports[portno].sc_port_lcr = lcr; umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, sc->sc_ports[pn].sc_port_lcr); sc->sc_ports[portno].sc_port_mcr = mcr; umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_port_mcr); if (umcs7840_set_baudrate(sc, portno, t->c_ospeed)) return EIO; return 0; } static void umcs7840_dtr(struct umcs7840_softc *sc, int portno, bool onoff) { int pn = sc->sc_ports[portno].sc_port_phys; uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; if (onoff) mcr |= MCS7840_UART_MCR_DTR; else mcr &= ~MCS7840_UART_MCR_DTR; sc->sc_ports[portno].sc_port_mcr = mcr; umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_port_mcr); } static void umcs7840_rts(struct umcs7840_softc *sc, int portno, bool onoff) { int pn = sc->sc_ports[portno].sc_port_phys; uint8_t mcr = sc->sc_ports[portno].sc_port_mcr; if (onoff) mcr |= MCS7840_UART_MCR_RTS; else mcr &= ~MCS7840_UART_MCR_RTS; sc->sc_ports[portno].sc_port_mcr = mcr; umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_port_mcr); } static void umcs7840_break(struct umcs7840_softc *sc, int portno, bool onoff) { int pn = sc->sc_ports[portno].sc_port_phys; uint8_t lcr = sc->sc_ports[portno].sc_port_lcr; if (onoff) lcr |= MCS7840_UART_LCR_BREAK; else lcr &= ~MCS7840_UART_LCR_BREAK; sc->sc_ports[portno].sc_port_lcr = lcr; umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, sc->sc_ports[pn].sc_port_lcr); } static int umcs7840_port_open(void *self, int portno) { struct umcs7840_softc *sc = self; int pn = sc->sc_ports[portno].sc_port_phys; int spreg = umcs7840_reg_sp(pn); int ctrlreg = umcs7840_reg_ctrl(pn); uint8_t data; if (sc->sc_dying) return EIO; /* If it very first open, finish global configuration */ if (!sc->sc_init_done) { if (umcs7840_get_reg(sc, MCS7840_DEV_REG_CONTROL1, &data)) return EIO; data |= MCS7840_DEV_CONTROL1_DRIVER_DONE; if (umcs7840_set_reg(sc, MCS7840_DEV_REG_CONTROL1, data)) return EIO; sc->sc_init_done = 1; } /* Toggle reset bit on-off */ if (umcs7840_get_reg(sc, spreg, &data)) return EIO; data |= MCS7840_DEV_SPx_UART_RESET; if (umcs7840_set_reg(sc, spreg, data)) return EIO; data &= ~MCS7840_DEV_SPx_UART_RESET; if (umcs7840_set_reg(sc, spreg, data)) return EIO; /* Set RS-232 mode */ if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_SCRATCHPAD, MCS7840_UART_SCRATCHPAD_RS232)) return EIO; /* Disable RX on time of initialization */ if (umcs7840_get_reg(sc, ctrlreg, &data)) return EIO; data |= MCS7840_DEV_CONTROLx_RX_DISABLE; if (umcs7840_set_reg(sc, ctrlreg, data)) return EIO; /* Disable all interrupts */ if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0)) return EIO; /* Reset FIFO -- documented */ if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_FCR, 0)) return EIO; if (umcs7840_set_UART_reg(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 EIO; /* Set 8 bit, no parity, 1 stop bit -- documented */ sc->sc_ports[pn].sc_port_lcr = MCS7840_UART_LCR_DATALEN8 | MCS7840_UART_LCR_STOPB1; if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_LCR, sc->sc_ports[pn].sc_port_lcr)) return EIO; /* * Enable DTR/RTS on modem control, enable modem interrupts -- * documented */ sc->sc_ports[pn].sc_port_mcr = MCS7840_UART_MCR_DTR | MCS7840_UART_MCR_RTS | MCS7840_UART_MCR_IE; if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, sc->sc_ports[pn].sc_port_mcr)) return EIO; /* Clearing Bulkin and Bulkout FIFO */ if (umcs7840_get_reg(sc, spreg, &data)) return EIO; data |= MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO; if (umcs7840_set_reg(sc, spreg, data)) return EIO; data &= ~(MCS7840_DEV_SPx_RESET_OUT_FIFO | MCS7840_DEV_SPx_RESET_IN_FIFO); if (umcs7840_set_reg(sc, spreg, data)) return EIO; /* Set speed 9600 */ if (umcs7840_set_baudrate(sc, portno, 9600)) return EIO; /* Finally enable all interrupts -- documented */ /* * Copied from vendor driver, I don't know why we should read LCR * here */ if (umcs7840_get_UART_reg(sc, pn, MCS7840_UART_REG_LCR, &sc->sc_ports[pn].sc_port_lcr)) return EIO; if (umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, MCS7840_UART_IER_RXSTAT | MCS7840_UART_IER_MODEM)) return EIO; /* Enable RX */ if (umcs7840_get_reg(sc, ctrlreg, &data)) return EIO; data &= ~MCS7840_DEV_CONTROLx_RX_DISABLE; if (umcs7840_set_reg(sc, ctrlreg, data)) return EIO; return 0; } static void umcs7840_port_close(void *self, int portno) { struct umcs7840_softc *sc = self; int pn = sc->sc_ports[portno].sc_port_phys; int ctrlreg = umcs7840_reg_ctrl(pn); uint8_t data; if (sc->sc_dying) return; umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_MCR, 0); umcs7840_set_UART_reg(sc, pn, MCS7840_UART_REG_IER, 0); /* Disable RX */ if (umcs7840_get_reg(sc, ctrlreg, &data)) return; data |= MCS7840_DEV_CONTROLx_RX_DISABLE; if (umcs7840_set_reg(sc, ctrlreg, data)) return; } static void umcs7840_intr(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status) { struct umcs7840_softc *sc = priv; u_char *buf = sc->sc_intr_buf; int actlen; int subunit; if (status == USBD_NOT_STARTED || status == USBD_CANCELLED || status == USBD_IOERROR) return; if (status != USBD_NORMAL_COMPLETION) { aprint_error_dev(sc->sc_dev, "umcs7840_intr: abnormal status: %s\n", usbd_errstr(status)); usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); return; } usbd_get_xfer_status(xfer, NULL, NULL, &actlen, NULL); if (actlen == 5 || actlen == 13) { uint32_t change_mask = 0; /* Check status of all ports */ for (subunit = 0; subunit < sc->sc_numports; subunit++) { uint8_t pn = sc->sc_ports[subunit].sc_port_phys; 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: change_mask |= (1U << subunit); break; default: /* Do nothing */ break; } } if (change_mask != 0) { atomic_or_32(&sc->sc_change_mask, change_mask); usb_add_task(sc->sc_udev, &sc->sc_change_task, USB_TASKQ_DRIVER); } } else { aprint_error_dev(sc->sc_dev, "Invalid interrupt data length %d", actlen); } } static void umcs7840_change_task(void *arg) { struct umcs7840_softc *sc = arg; uint32_t change_mask; int i; change_mask = atomic_swap_32(&sc->sc_change_mask, 0); for (i = 0; i < sc->sc_numports; i++) { if (ISSET(change_mask, (1U << i))) ucom_status_change(device_private( sc->sc_ports[i].sc_port_ucom)); } }