| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Paul B Schroeder | 4868 | 59.56% | 1 | 1.27% |
| Johan Hovold | 1154 | 14.12% | 26 | 32.91% |
| Greg Kroah-Hartman | 719 | 8.80% | 10 | 12.66% |
| Donald Lee | 605 | 7.40% | 2 | 2.53% |
| Oliver Neukum | 229 | 2.80% | 1 | 1.27% |
| Alan Cox | 162 | 1.98% | 8 | 10.13% |
| Dave Ludlow | 73 | 0.89% | 3 | 3.80% |
| Cliff Brake | 72 | 0.88% | 1 | 1.27% |
| Al Viro | 51 | 0.62% | 2 | 2.53% |
| JackyChou | 50 | 0.61% | 2 | 2.53% |
| Alan Stern | 34 | 0.42% | 2 | 2.53% |
| Tony Cook | 26 | 0.32% | 3 | 3.80% |
| Kees Cook | 22 | 0.27% | 1 | 1.27% |
| Mark Ferrell | 20 | 0.24% | 2 | 2.53% |
| Harvey Harrison | 16 | 0.20% | 1 | 1.27% |
| Jiri Slaby | 13 | 0.16% | 3 | 3.80% |
| Pavel Löbl | 10 | 0.12% | 1 | 1.27% |
| Blaise Gassend | 10 | 0.12% | 1 | 1.27% |
| John Ogness | 10 | 0.12% | 1 | 1.27% |
| Vaishali Thakkar | 9 | 0.11% | 1 | 1.27% |
| Russell Lang | 7 | 0.09% | 1 | 1.27% |
| Peter Hurley | 6 | 0.07% | 1 | 1.27% |
| Márton Németh | 3 | 0.04% | 1 | 1.27% |
| Mathieu OTHACEHE | 1 | 0.01% | 1 | 1.27% |
| Burman Yan | 1 | 0.01% | 1 | 1.27% |
| Alexey Khoroshilov | 1 | 0.01% | 1 | 1.27% |
| Roel Kluin | 1 | 0.01% | 1 | 1.27% |
| Total | 8173 | 79 |
// SPDX-License-Identifier: GPL-2.0+ /* * Clean ups from Moschip version and a few ioctl implementations by: * Paul B Schroeder <pschroeder "at" uplogix "dot" com> * * Originally based on drivers/usb/serial/io_edgeport.c which is: * Copyright (C) 2000 Inside Out Networks, All rights reserved. * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com> * */ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/tty.h> #include <linux/tty_driver.h> #include <linux/tty_flip.h> #include <linux/module.h> #include <linux/serial.h> #include <linux/usb.h> #include <linux/usb/serial.h> #include <linux/uaccess.h> #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver" /* * 16C50 UART register defines */ #define LCR_BITS_5 0x00 /* 5 bits/char */ #define LCR_BITS_6 0x01 /* 6 bits/char */ #define LCR_BITS_7 0x02 /* 7 bits/char */ #define LCR_BITS_8 0x03 /* 8 bits/char */ #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */ #define LCR_STOP_1 0x00 /* 1 stop bit */ #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */ #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */ #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */ #define LCR_PAR_NONE 0x00 /* No parity */ #define LCR_PAR_ODD 0x08 /* Odd parity */ #define LCR_PAR_EVEN 0x18 /* Even parity */ #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */ #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */ #define LCR_PAR_MASK 0x38 /* Mask for parity field */ #define LCR_SET_BREAK 0x40 /* Set Break condition */ #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */ #define MCR_DTR 0x01 /* Assert DTR */ #define MCR_RTS 0x02 /* Assert RTS */ #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */ #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */ #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */ #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */ #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */ #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */ #define MOS7840_MSR_RI 0x40 /* Current state of RI */ #define MOS7840_MSR_CD 0x80 /* Current state of CD */ /* * Defines used for sending commands to port */ #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */ #define MOS_PORT1 0x0200 #define MOS_PORT2 0x0300 #define MOS_VENREG 0x0000 #define MOS_MAX_PORT 0x02 #define MOS_WRITE 0x0E #define MOS_READ 0x0D /* Requests */ #define MCS_RD_RTYPE 0xC0 #define MCS_WR_RTYPE 0x40 #define MCS_RDREQ 0x0D #define MCS_WRREQ 0x0E #define MCS_CTRL_TIMEOUT 500 #define VENDOR_READ_LENGTH (0x01) #define MAX_NAME_LEN 64 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */ #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */ /* For higher baud Rates use TIOCEXBAUD */ #define TIOCEXBAUD 0x5462 /* * Vendor id and device id defines * * NOTE: Do not add new defines, add entries directly to the id_table instead. */ #define USB_VENDOR_ID_BANDB 0x0856 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24 /* Interrupt Routine Defines */ #define SERIAL_IIR_RLS 0x06 #define SERIAL_IIR_MS 0x00 /* * Emulation of the bit mask on the LINE STATUS REGISTER. */ #define SERIAL_LSR_DR 0x0001 #define SERIAL_LSR_OE 0x0002 #define SERIAL_LSR_PE 0x0004 #define SERIAL_LSR_FE 0x0008 #define SERIAL_LSR_BI 0x0010 #define MOS_MSR_DELTA_CTS 0x10 #define MOS_MSR_DELTA_DSR 0x20 #define MOS_MSR_DELTA_RI 0x40 #define MOS_MSR_DELTA_CD 0x80 /* Serial Port register Address */ #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01)) #define FIFO_CONTROL_REGISTER ((__u16)(0x02)) #define LINE_CONTROL_REGISTER ((__u16)(0x03)) #define MODEM_CONTROL_REGISTER ((__u16)(0x04)) #define LINE_STATUS_REGISTER ((__u16)(0x05)) #define MODEM_STATUS_REGISTER ((__u16)(0x06)) #define SCRATCH_PAD_REGISTER ((__u16)(0x07)) #define DIVISOR_LATCH_LSB ((__u16)(0x00)) #define DIVISOR_LATCH_MSB ((__u16)(0x01)) #define CLK_MULTI_REGISTER ((__u16)(0x02)) #define CLK_START_VALUE_REGISTER ((__u16)(0x03)) #define GPIO_REGISTER ((__u16)(0x07)) #define SERIAL_LCR_DLAB ((__u16)(0x0080)) /* * URB POOL related defines */ #define NUM_URBS 16 /* URB Count */ #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */ /* LED on/off milliseconds*/ #define LED_ON_MS 500 #define LED_OFF_MS 500 enum mos7840_flag { MOS7840_FLAG_LED_BUSY, }; #define MCS_PORT_MASK GENMASK(2, 0) #define MCS_PORTS(nr) ((nr) & MCS_PORT_MASK) #define MCS_LED BIT(3) #define MCS_DEVICE(vid, pid, flags) \ USB_DEVICE((vid), (pid)), .driver_info = (flags) static const struct usb_device_id id_table[] = { { MCS_DEVICE(0x0557, 0x2011, MCS_PORTS(4)) }, /* ATEN UC2324 */ { MCS_DEVICE(0x0557, 0x7820, MCS_PORTS(2)) }, /* ATEN UC2322 */ { MCS_DEVICE(0x110a, 0x2210, MCS_PORTS(2)) }, /* Moxa UPort 2210 */ { MCS_DEVICE(0x9710, 0x7810, MCS_PORTS(1) | MCS_LED) }, /* ASIX MCS7810 */ { MCS_DEVICE(0x9710, 0x7820, MCS_PORTS(2)) }, /* MosChip MCS7820 */ { MCS_DEVICE(0x9710, 0x7840, MCS_PORTS(4)) }, /* MosChip MCS7840 */ { MCS_DEVICE(0x9710, 0x7843, MCS_PORTS(3)) }, /* ASIX MCS7840 3 port */ { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P) }, { USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4) }, {} /* terminating entry */ }; MODULE_DEVICE_TABLE(usb, id_table); /* This structure holds all of the local port information */ struct moschip_port { int port_num; /*Actual port number in the device(1,2,etc) */ struct urb *read_urb; /* read URB for this port */ __u8 shadowLCR; /* last LCR value received */ __u8 shadowMCR; /* last MCR value received */ struct usb_serial_port *port; /* loop back to the owner of this object */ /* Offsets */ __u8 SpRegOffset; __u8 ControlRegOffset; __u8 DcrRegOffset; spinlock_t pool_lock; struct urb *write_urb_pool[NUM_URBS]; char busy[NUM_URBS]; bool read_urb_busy; /* For device(s) with LED indicator */ bool has_led; struct timer_list led_timer1; /* Timer for LED on */ struct timer_list led_timer2; /* Timer for LED off */ struct urb *led_urb; struct usb_ctrlrequest *led_dr; unsigned long flags; }; /* * mos7840_set_reg_sync * To set the Control register by calling usb_fill_control_urb function * by passing usb_sndctrlpipe function as parameter. */ static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 val) { struct usb_device *dev = port->serial->dev; val = val & 0x00ff; dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val); return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, val, reg, NULL, 0, MOS_WDR_TIMEOUT); } /* * mos7840_get_reg_sync * To set the Uart register by calling usb_fill_control_urb function by * passing usb_rcvctrlpipe function as parameter. */ static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg, __u16 *val) { struct usb_device *dev = port->serial->dev; int ret = 0; u8 *buf; buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); if (!buf) return -ENOMEM; ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); if (ret < VENDOR_READ_LENGTH) { if (ret >= 0) ret = -EIO; goto out; } *val = buf[0]; dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val); out: kfree(buf); return ret; } /* * mos7840_set_uart_reg * To set the Uart register by calling usb_fill_control_urb function by * passing usb_sndctrlpipe function as parameter. */ static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg, __u16 val) { struct usb_device *dev = port->serial->dev; val = val & 0x00ff; /* For the UART control registers, the application number need to be Or'ed */ if (port->serial->num_ports == 2 && port->port_number != 0) val |= ((__u16)port->port_number + 2) << 8; else val |= ((__u16)port->port_number + 1) << 8; dev_dbg(&port->dev, "%s application number is %x\n", __func__, val); return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, val, reg, NULL, 0, MOS_WDR_TIMEOUT); } /* * mos7840_get_uart_reg * To set the Control register by calling usb_fill_control_urb function * by passing usb_rcvctrlpipe function as parameter. */ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg, __u16 *val) { struct usb_device *dev = port->serial->dev; int ret = 0; __u16 Wval; u8 *buf; buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); if (!buf) return -ENOMEM; /* Wval is same as application number */ if (port->serial->num_ports == 2 && port->port_number != 0) Wval = ((__u16)port->port_number + 2) << 8; else Wval = ((__u16)port->port_number + 1) << 8; dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval); ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ, MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); if (ret < VENDOR_READ_LENGTH) { if (ret >= 0) ret = -EIO; goto out; } *val = buf[0]; out: kfree(buf); return ret; } static void mos7840_dump_serial_port(struct usb_serial_port *port, struct moschip_port *mos7840_port) { dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset); dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset); dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset); } /************************************************************************/ /************************************************************************/ /* U S B C A L L B A C K F U N C T I O N S */ /* U S B C A L L B A C K F U N C T I O N S */ /************************************************************************/ /************************************************************************/ static void mos7840_set_led_callback(struct urb *urb) { switch (urb->status) { case 0: /* Success */ break; case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: /* This urb is terminated, clean up */ dev_dbg(&urb->dev->dev, "%s - urb shutting down: %d\n", __func__, urb->status); break; default: dev_dbg(&urb->dev->dev, "%s - nonzero urb status: %d\n", __func__, urb->status); } } static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval, __u16 reg) { struct usb_device *dev = mcs->port->serial->dev; struct usb_ctrlrequest *dr = mcs->led_dr; dr->bRequestType = MCS_WR_RTYPE; dr->bRequest = MCS_WRREQ; dr->wValue = cpu_to_le16(wval); dr->wIndex = cpu_to_le16(reg); dr->wLength = cpu_to_le16(0); usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0), (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL); usb_submit_urb(mcs->led_urb, GFP_ATOMIC); } static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg, __u16 val) { struct usb_device *dev = port->serial->dev; usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE, val, reg, NULL, 0, MOS_WDR_TIMEOUT); } static void mos7840_led_off(struct timer_list *t) { struct moschip_port *mcs = from_timer(mcs, t, led_timer1); /* Turn off LED */ mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER); mod_timer(&mcs->led_timer2, jiffies + msecs_to_jiffies(LED_OFF_MS)); } static void mos7840_led_flag_off(struct timer_list *t) { struct moschip_port *mcs = from_timer(mcs, t, led_timer2); clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags); } static void mos7840_led_activity(struct usb_serial_port *port) { struct moschip_port *mos7840_port = usb_get_serial_port_data(port); if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags)) return; mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER); mod_timer(&mos7840_port->led_timer1, jiffies + msecs_to_jiffies(LED_ON_MS)); } /***************************************************************************** * mos7840_bulk_in_callback * this is the callback function for when we have received data on the * bulk in endpoint. *****************************************************************************/ static void mos7840_bulk_in_callback(struct urb *urb) { struct moschip_port *mos7840_port = urb->context; struct usb_serial_port *port = mos7840_port->port; int retval; unsigned char *data; int status = urb->status; if (status) { dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status); mos7840_port->read_urb_busy = false; return; } data = urb->transfer_buffer; usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); if (urb->actual_length) { struct tty_port *tport = &mos7840_port->port->port; tty_insert_flip_string(tport, data, urb->actual_length); tty_flip_buffer_push(tport); port->icount.rx += urb->actual_length; dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx); } if (mos7840_port->has_led) mos7840_led_activity(port); mos7840_port->read_urb_busy = true; retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC); if (retval) { dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval); mos7840_port->read_urb_busy = false; } } /***************************************************************************** * mos7840_bulk_out_data_callback * this is the callback function for when we have finished sending * serial data on the bulk out endpoint. *****************************************************************************/ static void mos7840_bulk_out_data_callback(struct urb *urb) { struct moschip_port *mos7840_port = urb->context; struct usb_serial_port *port = mos7840_port->port; int status = urb->status; unsigned long flags; int i; spin_lock_irqsave(&mos7840_port->pool_lock, flags); for (i = 0; i < NUM_URBS; i++) { if (urb == mos7840_port->write_urb_pool[i]) { mos7840_port->busy[i] = 0; break; } } spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); if (status) { dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status); return; } tty_port_tty_wakeup(&port->port); } /************************************************************************/ /* D R I V E R T T Y I N T E R F A C E F U N C T I O N S */ /************************************************************************/ /***************************************************************************** * mos7840_open * this function is called by the tty driver when a port is opened * If successful, we return 0 * Otherwise we return a negative error number. *****************************************************************************/ static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port) { struct moschip_port *mos7840_port = usb_get_serial_port_data(port); struct usb_serial *serial = port->serial; int response; int j; struct urb *urb; __u16 Data; int status; usb_clear_halt(serial->dev, port->write_urb->pipe); usb_clear_halt(serial->dev, port->read_urb->pipe); /* Initialising the write urb pool */ for (j = 0; j < NUM_URBS; ++j) { urb = usb_alloc_urb(0, GFP_KERNEL); mos7840_port->write_urb_pool[j] = urb; if (!urb) continue; urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL); if (!urb->transfer_buffer) { usb_free_urb(urb); mos7840_port->write_urb_pool[j] = NULL; continue; } } /***************************************************************************** * Initialize MCS7840 -- Write Init values to corresponding Registers * * Register Index * 1 : IER * 2 : FCR * 3 : LCR * 4 : MCR * * 0x08 : SP1/2 Control Reg *****************************************************************************/ /* NEED to check the following Block */ Data = 0x0; status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); if (status < 0) { dev_dbg(&port->dev, "Reading Spreg failed\n"); goto err; } Data |= 0x80; status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); if (status < 0) { dev_dbg(&port->dev, "writing Spreg failed\n"); goto err; } Data &= ~0x80; status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); if (status < 0) { dev_dbg(&port->dev, "writing Spreg failed\n"); goto err; } /* End of block to be checked */ Data = 0x0; status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); if (status < 0) { dev_dbg(&port->dev, "Reading Controlreg failed\n"); goto err; } Data |= 0x08; /* Driver done bit */ Data |= 0x20; /* rx_disable */ status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); if (status < 0) { dev_dbg(&port->dev, "writing Controlreg failed\n"); goto err; } /* do register settings here */ /* Set all regs to the device default values. */ /*********************************** * First Disable all interrupts. ***********************************/ Data = 0x00; status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); if (status < 0) { dev_dbg(&port->dev, "disabling interrupts failed\n"); goto err; } /* Set FIFO_CONTROL_REGISTER to the default value */ Data = 0x00; status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); if (status < 0) { dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); goto err; } Data = 0xcf; status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); if (status < 0) { dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n"); goto err; } Data = 0x03; status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); mos7840_port->shadowLCR = Data; Data = 0x0b; status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); mos7840_port->shadowMCR = Data; Data = 0x00; status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); mos7840_port->shadowLCR = Data; Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */ status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); Data = 0x0c; status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); Data = 0x0; status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); Data = 0x00; status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data); Data = Data & ~SERIAL_LCR_DLAB; status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); mos7840_port->shadowLCR = Data; /* clearing Bulkin and Bulkout Fifo */ Data = 0x0; status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); Data = Data | 0x0c; status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); Data = Data & ~0x0c; status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); /* Finally enable all interrupts */ Data = 0x0c; status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); /* clearing rx_disable */ Data = 0x0; status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); Data = Data & ~0x20; status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); /* rx_negate */ Data = 0x0; status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); Data = Data | 0x10; status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); dev_dbg(&port->dev, "port number is %d\n", port->port_number); dev_dbg(&port->dev, "minor number is %d\n", port->minor); dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress); dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress); dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress); dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num); mos7840_port->read_urb = port->read_urb; /* set up our bulk in urb */ if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { usb_fill_bulk_urb(mos7840_port->read_urb, serial->dev, usb_rcvbulkpipe(serial->dev, (port->bulk_in_endpointAddress) + 2), port->bulk_in_buffer, mos7840_port->read_urb->transfer_buffer_length, mos7840_bulk_in_callback, mos7840_port); } else { usb_fill_bulk_urb(mos7840_port->read_urb, serial->dev, usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress), port->bulk_in_buffer, mos7840_port->read_urb->transfer_buffer_length, mos7840_bulk_in_callback, mos7840_port); } dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress); mos7840_port->read_urb_busy = true; response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); if (response) { dev_err(&port->dev, "%s - Error %d submitting control urb\n", __func__, response); mos7840_port->read_urb_busy = false; } /* initialize our port settings */ /* Must set to enable ints! */ mos7840_port->shadowMCR = MCR_MASTER_IE; return 0; err: for (j = 0; j < NUM_URBS; ++j) { urb = mos7840_port->write_urb_pool[j]; if (!urb) continue; kfree(urb->transfer_buffer); usb_free_urb(urb); } return status; } /***************************************************************************** * mos7840_chars_in_buffer * this function is called by the tty driver when it wants to know how many * bytes of data we currently have outstanding in the port (data that has * been written, but hasn't made it out the port yet) * If successful, we return the number of bytes left to be written in the * system, * Otherwise we return zero. *****************************************************************************/ static int mos7840_chars_in_buffer(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct moschip_port *mos7840_port = usb_get_serial_port_data(port); int i; int chars = 0; unsigned long flags; spin_lock_irqsave(&mos7840_port->pool_lock, flags); for (i = 0; i < NUM_URBS; ++i) { if (mos7840_port->busy[i]) { struct urb *urb = mos7840_port->write_urb_pool[i]; chars += urb->transfer_buffer_length; } } spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); return chars; } /***************************************************************************** * mos7840_close * this function is called by the tty driver when a port is closed *****************************************************************************/ static void mos7840_close(struct usb_serial_port *port) { struct moschip_port *mos7840_port = usb_get_serial_port_data(port); int j; __u16 Data; for (j = 0; j < NUM_URBS; ++j) usb_kill_urb(mos7840_port->write_urb_pool[j]); /* Freeing Write URBs */ for (j = 0; j < NUM_URBS; ++j) { if (mos7840_port->write_urb_pool[j]) { kfree(mos7840_port->write_urb_pool[j]->transfer_buffer); usb_free_urb(mos7840_port->write_urb_pool[j]); } } usb_kill_urb(mos7840_port->read_urb); mos7840_port->read_urb_busy = false; Data = 0x0; mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); Data = 0x00; mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); } /***************************************************************************** * mos7840_break * this function sends a break to the port *****************************************************************************/ static void mos7840_break(struct tty_struct *tty, int break_state) { struct usb_serial_port *port = tty->driver_data; struct moschip_port *mos7840_port = usb_get_serial_port_data(port); unsigned char data; if (break_state == -1) data = mos7840_port->shadowLCR | LCR_SET_BREAK; else data = mos7840_port->shadowLCR & ~LCR_SET_BREAK; /* FIXME: no locking on shadowLCR anywhere in driver */ mos7840_port->shadowLCR = data; dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, mos7840_port->shadowLCR); } /***************************************************************************** * mos7840_write_room * this function is called by the tty driver when it wants to know how many * bytes of data we can accept for a specific port. * If successful, we return the amount of room that we have for this port * Otherwise we return a negative error number. *****************************************************************************/ static int mos7840_write_room(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct moschip_port *mos7840_port = usb_get_serial_port_data(port); int i; int room = 0; unsigned long flags; spin_lock_irqsave(&mos7840_port->pool_lock, flags); for (i = 0; i < NUM_URBS; ++i) { if (!mos7840_port->busy[i]) room += URB_TRANSFER_BUFFER_SIZE; } spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1; dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room); return room; } /***************************************************************************** * mos7840_write * this function is called by the tty driver when data should be written to * the port. * If successful, we return the number of bytes written, otherwise we * return a negative error number. *****************************************************************************/ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *data, int count) { struct moschip_port *mos7840_port = usb_get_serial_port_data(port); struct usb_serial *serial = port->serial; int status; int i; int bytes_sent = 0; int transfer_size; unsigned long flags; struct urb *urb; /* __u16 Data; */ const unsigned char *current_position = data; /* try to find a free urb in the list */ urb = NULL; spin_lock_irqsave(&mos7840_port->pool_lock, flags); for (i = 0; i < NUM_URBS; ++i) { if (!mos7840_port->busy[i]) { mos7840_port->busy[i] = 1; urb = mos7840_port->write_urb_pool[i]; dev_dbg(&port->dev, "URB:%d\n", i); break; } } spin_unlock_irqrestore(&mos7840_port->pool_lock, flags); if (urb == NULL) { dev_dbg(&port->dev, "%s - no more free urbs\n", __func__); goto exit; } if (urb->transfer_buffer == NULL) { urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC); if (!urb->transfer_buffer) goto exit; } transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE); memcpy(urb->transfer_buffer, current_position, transfer_size); /* fill urb with data and submit */ if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) { usb_fill_bulk_urb(urb, serial->dev, usb_sndbulkpipe(serial->dev, (port->bulk_out_endpointAddress) + 2), urb->transfer_buffer, transfer_size, mos7840_bulk_out_data_callback, mos7840_port); } else { usb_fill_bulk_urb(urb, serial->dev, usb_sndbulkpipe(serial->dev, port->bulk_out_endpointAddress), urb->transfer_buffer, transfer_size, mos7840_bulk_out_data_callback, mos7840_port); } dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress); if (mos7840_port->has_led) mos7840_led_activity(port); /* send it down the pipe */ status = usb_submit_urb(urb, GFP_ATOMIC); if (status) { mos7840_port->busy[i] = 0; dev_err_console(port, "%s - usb_submit_urb(write bulk) failed " "with status = %d\n", __func__, status); bytes_sent = status; goto exit; } bytes_sent = transfer_size; port->icount.tx += transfer_size; dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx); exit: return bytes_sent; } /***************************************************************************** * mos7840_throttle * this function is called by the tty driver when it wants to stop the data * being read from the port. *****************************************************************************/ static void mos7840_throttle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct moschip_port *mos7840_port = usb_get_serial_port_data(port); int status; /* if we are implementing XON/XOFF, send the stop character */ if (I_IXOFF(tty)) { unsigned char stop_char = STOP_CHAR(tty); status = mos7840_write(tty, port, &stop_char, 1); if (status <= 0) return; } /* if we are implementing RTS/CTS, toggle that line */ if (C_CRTSCTS(tty)) { mos7840_port->shadowMCR &= ~MCR_RTS; status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mos7840_port->shadowMCR); if (status < 0) return; } } /***************************************************************************** * mos7840_unthrottle * this function is called by the tty driver when it wants to resume * the data being read from the port (called after mos7840_throttle is * called) *****************************************************************************/ static void mos7840_unthrottle(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct moschip_port *mos7840_port = usb_get_serial_port_data(port); int status; /* if we are implementing XON/XOFF, send the start character */ if (I_IXOFF(tty)) { unsigned char start_char = START_CHAR(tty); status = mos7840_write(tty, port, &start_char, 1); if (status <= 0) return; } /* if we are implementing RTS/CTS, toggle that line */ if (C_CRTSCTS(tty)) { mos7840_port->shadowMCR |= MCR_RTS; status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mos7840_port->shadowMCR); if (status < 0) return; } } static int mos7840_tiocmget(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; unsigned int result; __u16 msr; __u16 mcr; int status; status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr); if (status < 0) return -EIO; status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr); if (status < 0) return -EIO; result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) | ((mcr & MCR_RTS) ? TIOCM_RTS : 0) | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0) | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result); return result; } static int mos7840_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) { struct usb_serial_port *port = tty->driver_data; struct moschip_port *mos7840_port = usb_get_serial_port_data(port); unsigned int mcr; int status; /* FIXME: What locks the port registers ? */ mcr = mos7840_port->shadowMCR; if (clear & TIOCM_RTS) mcr &= ~MCR_RTS; if (clear & TIOCM_DTR) mcr &= ~MCR_DTR; if (clear & TIOCM_LOOP) mcr &= ~MCR_LOOPBACK; if (set & TIOCM_RTS) mcr |= MCR_RTS; if (set & TIOCM_DTR) mcr |= MCR_DTR; if (set & TIOCM_LOOP) mcr |= MCR_LOOPBACK; mos7840_port->shadowMCR = mcr; status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr); if (status < 0) { dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n"); return status; } return 0; } /***************************************************************************** * mos7840_calc_baud_rate_divisor * this function calculates the proper baud rate divisor for the specified * baud rate. *****************************************************************************/ static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port, int baudRate, int *divisor, __u16 *clk_sel_val) { dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate); if (baudRate <= 115200) { *divisor = 115200 / baudRate; *clk_sel_val = 0x0; } if ((baudRate > 115200) && (baudRate <= 230400)) { *divisor = 230400 / baudRate; *clk_sel_val = 0x10; } else if ((baudRate > 230400) && (baudRate <= 403200)) { *divisor = 403200 / baudRate; *clk_sel_val = 0x20; } else if ((baudRate > 403200) && (baudRate <= 460800)) { *divisor = 460800 / baudRate; *clk_sel_val = 0x30; } else if ((baudRate > 460800) && (baudRate <= 806400)) { *divisor = 806400 / baudRate; *clk_sel_val = 0x40; } else if ((baudRate > 806400) && (baudRate <= 921600)) { *divisor = 921600 / baudRate; *clk_sel_val = 0x50; } else if ((baudRate > 921600) && (baudRate <= 1572864)) { *divisor = 1572864 / baudRate; *clk_sel_val = 0x60; } else if ((baudRate > 1572864) && (baudRate <= 3145728)) { *divisor = 3145728 / baudRate; *clk_sel_val = 0x70; } return 0; } /***************************************************************************** * mos7840_send_cmd_write_baud_rate * this function sends the proper command to change the baud rate of the * specified port. *****************************************************************************/ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port, int baudRate) { struct usb_serial_port *port = mos7840_port->port; int divisor = 0; int status; __u16 Data; __u16 clk_sel_val; dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate); /* reset clk_uart_sel in spregOffset */ if (baudRate > 115200) { #ifdef HW_flow_control /* NOTE: need to see the pther register to modify */ /* setting h/w flow control bit to 1 */ Data = 0x2b; mos7840_port->shadowMCR = Data; status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); if (status < 0) { dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); return -1; } #endif } else { #ifdef HW_flow_control /* setting h/w flow control bit to 0 */ Data = 0xb; mos7840_port->shadowMCR = Data; status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); if (status < 0) { dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); return -1; } #endif } if (1) { /* baudRate <= 115200) */ clk_sel_val = 0x0; Data = 0x0; status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor, &clk_sel_val); status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data); if (status < 0) { dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n"); return -1; } Data = (Data & 0x8f) | clk_sel_val; status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data); if (status < 0) { dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n"); return -1; } /* Calculate the Divisor */ if (status) { dev_err(&port->dev, "%s - bad baud rate\n", __func__); return status; } /* Enable access to divisor latch */ Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB; mos7840_port->shadowLCR = Data; mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); /* Write the divisor */ Data = (unsigned char)(divisor & 0xff); dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data); mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data); Data = (unsigned char)((divisor & 0xff00) >> 8); dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data); mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data); /* Disable access to divisor latch */ Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB; mos7840_port->shadowLCR = Data; mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); } return status; } /***************************************************************************** * mos7840_change_port_settings * This routine is called to set the UART on the device to match * the specified new settings. *****************************************************************************/ static void mos7840_change_port_settings(struct tty_struct *tty, struct moschip_port *mos7840_port, struct ktermios *old_termios) { struct usb_serial_port *port = mos7840_port->port; int baud; unsigned cflag; __u8 lData; __u8 lParity; __u8 lStop; int status; __u16 Data; lData = LCR_BITS_8; lStop = LCR_STOP_1; lParity = LCR_PAR_NONE; cflag = tty->termios.c_cflag; /* Change the number of bits */ switch (cflag & CSIZE) { case CS5: lData = LCR_BITS_5; break; case CS6: lData = LCR_BITS_6; break; case CS7: lData = LCR_BITS_7; break; default: case CS8: lData = LCR_BITS_8; break; } /* Change the Parity bit */ if (cflag & PARENB) { if (cflag & PARODD) { lParity = LCR_PAR_ODD; dev_dbg(&port->dev, "%s - parity = odd\n", __func__); } else { lParity = LCR_PAR_EVEN; dev_dbg(&port->dev, "%s - parity = even\n", __func__); } } else { dev_dbg(&port->dev, "%s - parity = none\n", __func__); } if (cflag & CMSPAR) lParity = lParity | 0x20; /* Change the Stop bit */ if (cflag & CSTOPB) { lStop = LCR_STOP_2; dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__); } else { lStop = LCR_STOP_1; dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__); } /* Update the LCR with the correct value */ mos7840_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK); mos7840_port->shadowLCR |= (lData | lParity | lStop); dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR); /* Disable Interrupts */ Data = 0x00; mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); Data = 0x00; mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); Data = 0xcf; mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data); /* Send the updated LCR value to the mos7840 */ Data = mos7840_port->shadowLCR; mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data); Data = 0x00b; mos7840_port->shadowMCR = Data; mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); Data = 0x00b; mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); /* set up the MCR register and send it to the mos7840 */ mos7840_port->shadowMCR = MCR_MASTER_IE; if (cflag & CBAUD) mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS); if (cflag & CRTSCTS) mos7840_port->shadowMCR |= (MCR_XON_ANY); else mos7840_port->shadowMCR &= ~(MCR_XON_ANY); Data = mos7840_port->shadowMCR; mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data); /* Determine divisor based on baud rate */ baud = tty_get_baud_rate(tty); if (!baud) { /* pick a default, any default... */ dev_dbg(&port->dev, "%s", "Picked default baud...\n"); baud = 9600; } dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud); status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud); /* Enable Interrupts */ Data = 0x0c; mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data); if (!mos7840_port->read_urb_busy) { mos7840_port->read_urb_busy = true; status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); if (status) { dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); mos7840_port->read_urb_busy = false; } } dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__, mos7840_port->shadowLCR); } /***************************************************************************** * mos7840_set_termios * this function is called by the tty driver when it wants to change * the termios structure *****************************************************************************/ static void mos7840_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { struct moschip_port *mos7840_port = usb_get_serial_port_data(port); int status; /* change the port settings to the new ones specified */ mos7840_change_port_settings(tty, mos7840_port, old_termios); if (!mos7840_port->read_urb_busy) { mos7840_port->read_urb_busy = true; status = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL); if (status) { dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n", status); mos7840_port->read_urb_busy = false; } } } /***************************************************************************** * mos7840_get_lsr_info - get line status register info * * Purpose: Let user call ioctl() to get info when the UART physically * is emptied. On bus types like RS485, the transmitter must * release the bus after transmitting. This must be done when * the transmit shift register is empty, not be done when the * transmit holding register is empty. This functionality * allows an RS485 driver to be written in user space. *****************************************************************************/ static int mos7840_get_lsr_info(struct tty_struct *tty, unsigned int __user *value) { int count; unsigned int result = 0; count = mos7840_chars_in_buffer(tty); if (count == 0) result = TIOCSER_TEMT; if (copy_to_user(value, &result, sizeof(int))) return -EFAULT; return 0; } /***************************************************************************** * mos7840_get_serial_info * function to get information about serial port *****************************************************************************/ static int mos7840_get_serial_info(struct tty_struct *tty, struct serial_struct *ss) { struct usb_serial_port *port = tty->driver_data; struct moschip_port *mos7840_port = usb_get_serial_port_data(port); ss->type = PORT_16550A; ss->line = mos7840_port->port->minor; ss->port = mos7840_port->port->port_number; ss->irq = 0; ss->xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE; ss->baud_base = 9600; ss->close_delay = 5 * HZ; ss->closing_wait = 30 * HZ; return 0; } /***************************************************************************** * SerialIoctl * this function handles any ioctl calls to the driver *****************************************************************************/ static int mos7840_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) { struct usb_serial_port *port = tty->driver_data; void __user *argp = (void __user *)arg; switch (cmd) { /* return number of bytes available */ case TIOCSERGETLSR: dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__); return mos7840_get_lsr_info(tty, argp); default: break; } return -ENOIOCTLCMD; } /* * Check if GPO (pin 42) is connected to GPI (pin 33) as recommended by ASIX * for MCS7810 by bit-banging a 16-bit word. * * Note that GPO is really RTS of the third port so this will toggle RTS of * port two or three on two- and four-port devices. */ static int mos7810_check(struct usb_serial *serial) { int i, pass_count = 0; u8 *buf; __u16 data = 0, mcr_data = 0; __u16 test_pattern = 0x55AA; int res; buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL); if (!buf) return 0; /* failed to identify 7810 */ /* Store MCR setting */ res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER, buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); if (res == VENDOR_READ_LENGTH) mcr_data = *buf; for (i = 0; i < 16; i++) { /* Send the 1-bit test pattern out to MCS7810 test pin */ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, MCS_WR_RTYPE, (0x0300 | (((test_pattern >> i) & 0x0001) << 1)), MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); /* Read the test pattern back */ res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); if (res == VENDOR_READ_LENGTH) data = *buf; /* If this is a MCS7810 device, both test patterns must match */ if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001) break; pass_count++; } /* Restore MCR setting */ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ, MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT); kfree(buf); if (pass_count == 16) return 1; return 0; } static int mos7840_probe(struct usb_serial *serial, const struct usb_device_id *id) { unsigned long device_flags = id->driver_info; u8 *buf; /* Skip device-type detection if we already have device flags. */ if (device_flags) goto out; buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL); if (!buf) return -ENOMEM; usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT); /* For a MCS7840 device GPIO0 must be set to 1 */ if (buf[0] & 0x01) device_flags = MCS_PORTS(4); else if (mos7810_check(serial)) device_flags = MCS_PORTS(1) | MCS_LED; else device_flags = MCS_PORTS(2); kfree(buf); out: usb_set_serial_data(serial, (void *)device_flags); return 0; } static int mos7840_calc_num_ports(struct usb_serial *serial, struct usb_serial_endpoints *epds) { unsigned long device_flags = (unsigned long)usb_get_serial_data(serial); int num_ports = MCS_PORTS(device_flags); if (num_ports == 0 || num_ports > 4) return -ENODEV; if (epds->num_bulk_in < num_ports || epds->num_bulk_out < num_ports) { dev_err(&serial->interface->dev, "missing endpoints\n"); return -ENODEV; } return num_ports; } static int mos7840_attach(struct usb_serial *serial) { struct device *dev = &serial->interface->dev; int status; u16 val; /* Zero Length flag enable */ val = 0x0f; status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, val); if (status < 0) dev_dbg(dev, "Writing ZLP_REG5 failed status-0x%x\n", status); else dev_dbg(dev, "ZLP_REG5 Writing success status%d\n", status); return status; } static int mos7840_port_probe(struct usb_serial_port *port) { struct usb_serial *serial = port->serial; unsigned long device_flags = (unsigned long)usb_get_serial_data(serial); struct moschip_port *mos7840_port; int status; int pnum; __u16 Data; /* we set up the pointers to the endpoints in the mos7840_open * * function, as the structures aren't created yet. */ pnum = port->port_number; dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum); mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL); if (!mos7840_port) return -ENOMEM; /* Initialize all port interrupt end point to port 0 int * endpoint. Our device has only one interrupt end point * common to all port */ mos7840_port->port = port; spin_lock_init(&mos7840_port->pool_lock); /* minor is not initialised until later by * usb-serial.c:get_free_serial() and cannot therefore be used * to index device instances */ mos7840_port->port_num = pnum + 1; dev_dbg(&port->dev, "port->minor = %d\n", port->minor); dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num); if (mos7840_port->port_num == 1) { mos7840_port->SpRegOffset = 0x0; mos7840_port->ControlRegOffset = 0x1; mos7840_port->DcrRegOffset = 0x4; } else { u8 phy_num = mos7840_port->port_num; /* Port 2 in the 2-port case uses registers of port 3 */ if (serial->num_ports == 2) phy_num = 3; mos7840_port->SpRegOffset = 0x8 + 2 * (phy_num - 2); mos7840_port->ControlRegOffset = 0x9 + 2 * (phy_num - 2); mos7840_port->DcrRegOffset = 0x16 + 3 * (phy_num - 2); } mos7840_dump_serial_port(port, mos7840_port); usb_set_serial_port_data(port, mos7840_port); /* enable rx_disable bit in control register */ status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data); if (status < 0) { dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status); goto error; } else dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status); Data |= 0x08; /* setting driver done bit */ Data |= 0x04; /* sp1_bit to have cts change reflect in modem status reg */ /* Data |= 0x20; //rx_disable bit */ status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data); if (status < 0) { dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status); goto error; } else dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status); /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3 */ Data = 0x01; status = mos7840_set_reg_sync(port, (__u16) (mos7840_port->DcrRegOffset + 0), Data); if (status < 0) { dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status); goto error; } else dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status); Data = 0x05; status = mos7840_set_reg_sync(port, (__u16) (mos7840_port->DcrRegOffset + 1), Data); if (status < 0) { dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status); goto error; } else dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status); Data = 0x24; status = mos7840_set_reg_sync(port, (__u16) (mos7840_port->DcrRegOffset + 2), Data); if (status < 0) { dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status); goto error; } else dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status); /* write values in clkstart0x0 and clkmulti 0x20 */ Data = 0x0; status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data); if (status < 0) { dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status); goto error; } else dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status); Data = 0x20; status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data); if (status < 0) { dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status); goto error; } else dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status); /* write value 0x0 to scratchpad register */ Data = 0x00; status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data); if (status < 0) { dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status); goto error; } else dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status); /* Zero Length flag register */ if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) { Data = 0xff; status = mos7840_set_reg_sync(port, (__u16) (ZLP_REG1 + ((__u16)mos7840_port->port_num)), Data); dev_dbg(&port->dev, "ZLIP offset %x\n", (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num))); if (status < 0) { dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status); goto error; } else dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status); } else { Data = 0xff; status = mos7840_set_reg_sync(port, (__u16) (ZLP_REG1 + ((__u16)mos7840_port->port_num) - 0x1), Data); dev_dbg(&port->dev, "ZLIP offset %x\n", (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1)); if (status < 0) { dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status); goto error; } else dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status); } mos7840_port->has_led = device_flags & MCS_LED; /* Initialize LED timers */ if (mos7840_port->has_led) { mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL); mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr), GFP_KERNEL); if (!mos7840_port->led_urb || !mos7840_port->led_dr) { status = -ENOMEM; goto error; } timer_setup(&mos7840_port->led_timer1, mos7840_led_off, 0); mos7840_port->led_timer1.expires = jiffies + msecs_to_jiffies(LED_ON_MS); timer_setup(&mos7840_port->led_timer2, mos7840_led_flag_off, 0); mos7840_port->led_timer2.expires = jiffies + msecs_to_jiffies(LED_OFF_MS); /* Turn off LED */ mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); } return 0; error: kfree(mos7840_port->led_dr); usb_free_urb(mos7840_port->led_urb); kfree(mos7840_port); return status; } static int mos7840_port_remove(struct usb_serial_port *port) { struct moschip_port *mos7840_port = usb_get_serial_port_data(port); if (mos7840_port->has_led) { /* Turn off LED */ mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300); del_timer_sync(&mos7840_port->led_timer1); del_timer_sync(&mos7840_port->led_timer2); usb_kill_urb(mos7840_port->led_urb); usb_free_urb(mos7840_port->led_urb); kfree(mos7840_port->led_dr); } kfree(mos7840_port); return 0; } static struct usb_serial_driver moschip7840_4port_device = { .driver = { .owner = THIS_MODULE, .name = "mos7840", }, .description = DRIVER_DESC, .id_table = id_table, .num_interrupt_in = 1, .open = mos7840_open, .close = mos7840_close, .write = mos7840_write, .write_room = mos7840_write_room, .chars_in_buffer = mos7840_chars_in_buffer, .throttle = mos7840_throttle, .unthrottle = mos7840_unthrottle, .calc_num_ports = mos7840_calc_num_ports, .probe = mos7840_probe, .attach = mos7840_attach, .ioctl = mos7840_ioctl, .get_serial = mos7840_get_serial_info, .set_termios = mos7840_set_termios, .break_ctl = mos7840_break, .tiocmget = mos7840_tiocmget, .tiocmset = mos7840_tiocmset, .get_icount = usb_serial_generic_get_icount, .port_probe = mos7840_port_probe, .port_remove = mos7840_port_remove, .read_bulk_callback = mos7840_bulk_in_callback, }; static struct usb_serial_driver * const serial_drivers[] = { &moschip7840_4port_device, NULL }; module_usb_serial_driver(serial_drivers, id_table); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL");
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