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0001 // SPDX-License-Identifier: GPL-2.0+
0002 /*
0003  * Infinity Unlimited USB Phoenix driver
0004  *
0005  * Copyright (C) 2010 James Courtier-Dutton (James@superbug.co.uk)
0006 
0007  * Copyright (C) 2007 Alain Degreffe (eczema@ecze.com)
0008  *
0009  * Original code taken from iuutool (Copyright (C) 2006 Juan Carlos Borrás)
0010  *
0011  *  And tested with help of WB Electronics
0012  */
0013 #include <linux/kernel.h>
0014 #include <linux/errno.h>
0015 #include <linux/slab.h>
0016 #include <linux/tty.h>
0017 #include <linux/tty_driver.h>
0018 #include <linux/tty_flip.h>
0019 #include <linux/serial.h>
0020 #include <linux/module.h>
0021 #include <linux/moduleparam.h>
0022 #include <linux/spinlock.h>
0023 #include <linux/uaccess.h>
0024 #include <linux/usb.h>
0025 #include <linux/usb/serial.h>
0026 #include "iuu_phoenix.h"
0027 #include <linux/random.h>
0028 
0029 #define DRIVER_DESC "Infinity USB Unlimited Phoenix driver"
0030 
0031 static const struct usb_device_id id_table[] = {
0032     {USB_DEVICE(IUU_USB_VENDOR_ID, IUU_USB_PRODUCT_ID)},
0033     {}          /* Terminating entry */
0034 };
0035 MODULE_DEVICE_TABLE(usb, id_table);
0036 
0037 /* turbo parameter */
0038 static int boost = 100;
0039 static int clockmode = 1;
0040 static int cdmode = 1;
0041 static int iuu_cardin;
0042 static int iuu_cardout;
0043 static bool xmas;
0044 static int vcc_default = 5;
0045 
0046 static int iuu_create_sysfs_attrs(struct usb_serial_port *port);
0047 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port);
0048 static void read_rxcmd_callback(struct urb *urb);
0049 
0050 struct iuu_private {
0051     spinlock_t lock;    /* store irq state */
0052     u8 line_status;
0053     int tiostatus;      /* store IUART SIGNAL for tiocmget call */
0054     u8 reset;       /* if 1 reset is needed */
0055     int poll;       /* number of poll */
0056     u8 *writebuf;       /* buffer for writing to device */
0057     int writelen;       /* num of byte to write to device */
0058     u8 *buf;        /* used for initialize speed */
0059     u8 len;
0060     int vcc;        /* vcc (either 3 or 5 V) */
0061     u32 boost;
0062     u32 clk;
0063 };
0064 
0065 static int iuu_port_probe(struct usb_serial_port *port)
0066 {
0067     struct iuu_private *priv;
0068     int ret;
0069 
0070     priv = kzalloc(sizeof(struct iuu_private), GFP_KERNEL);
0071     if (!priv)
0072         return -ENOMEM;
0073 
0074     priv->buf = kzalloc(256, GFP_KERNEL);
0075     if (!priv->buf) {
0076         kfree(priv);
0077         return -ENOMEM;
0078     }
0079 
0080     priv->writebuf = kzalloc(256, GFP_KERNEL);
0081     if (!priv->writebuf) {
0082         kfree(priv->buf);
0083         kfree(priv);
0084         return -ENOMEM;
0085     }
0086 
0087     priv->vcc = vcc_default;
0088     spin_lock_init(&priv->lock);
0089 
0090     usb_set_serial_port_data(port, priv);
0091 
0092     ret = iuu_create_sysfs_attrs(port);
0093     if (ret) {
0094         kfree(priv->writebuf);
0095         kfree(priv->buf);
0096         kfree(priv);
0097         return ret;
0098     }
0099 
0100     return 0;
0101 }
0102 
0103 static void iuu_port_remove(struct usb_serial_port *port)
0104 {
0105     struct iuu_private *priv = usb_get_serial_port_data(port);
0106 
0107     iuu_remove_sysfs_attrs(port);
0108     kfree(priv->writebuf);
0109     kfree(priv->buf);
0110     kfree(priv);
0111 }
0112 
0113 static int iuu_tiocmset(struct tty_struct *tty,
0114             unsigned int set, unsigned int clear)
0115 {
0116     struct usb_serial_port *port = tty->driver_data;
0117     struct iuu_private *priv = usb_get_serial_port_data(port);
0118     unsigned long flags;
0119 
0120     /* FIXME: locking on tiomstatus */
0121     dev_dbg(&port->dev, "%s msg : SET = 0x%04x, CLEAR = 0x%04x\n",
0122         __func__, set, clear);
0123 
0124     spin_lock_irqsave(&priv->lock, flags);
0125 
0126     if ((set & TIOCM_RTS) && !(priv->tiostatus == TIOCM_RTS)) {
0127         dev_dbg(&port->dev, "%s TIOCMSET RESET called !!!\n", __func__);
0128         priv->reset = 1;
0129     }
0130     if (set & TIOCM_RTS)
0131         priv->tiostatus = TIOCM_RTS;
0132 
0133     spin_unlock_irqrestore(&priv->lock, flags);
0134     return 0;
0135 }
0136 
0137 /* This is used to provide a carrier detect mechanism
0138  * When a card is present, the response is 0x00
0139  * When no card , the reader respond with TIOCM_CD
0140  * This is known as CD autodetect mechanism
0141  */
0142 static int iuu_tiocmget(struct tty_struct *tty)
0143 {
0144     struct usb_serial_port *port = tty->driver_data;
0145     struct iuu_private *priv = usb_get_serial_port_data(port);
0146     unsigned long flags;
0147     int rc;
0148 
0149     spin_lock_irqsave(&priv->lock, flags);
0150     rc = priv->tiostatus;
0151     spin_unlock_irqrestore(&priv->lock, flags);
0152 
0153     return rc;
0154 }
0155 
0156 static void iuu_rxcmd(struct urb *urb)
0157 {
0158     struct usb_serial_port *port = urb->context;
0159     int status = urb->status;
0160 
0161     if (status) {
0162         dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
0163         /* error stop all */
0164         return;
0165     }
0166 
0167 
0168     memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
0169     usb_fill_bulk_urb(port->write_urb, port->serial->dev,
0170               usb_sndbulkpipe(port->serial->dev,
0171                       port->bulk_out_endpointAddress),
0172               port->write_urb->transfer_buffer, 1,
0173               read_rxcmd_callback, port);
0174     usb_submit_urb(port->write_urb, GFP_ATOMIC);
0175 }
0176 
0177 static int iuu_reset(struct usb_serial_port *port, u8 wt)
0178 {
0179     struct iuu_private *priv = usb_get_serial_port_data(port);
0180     int result;
0181     char *buf_ptr = port->write_urb->transfer_buffer;
0182 
0183     /* Prepare the reset sequence */
0184 
0185     *buf_ptr++ = IUU_RST_SET;
0186     *buf_ptr++ = IUU_DELAY_MS;
0187     *buf_ptr++ = wt;
0188     *buf_ptr = IUU_RST_CLEAR;
0189 
0190     /* send the sequence */
0191 
0192     usb_fill_bulk_urb(port->write_urb,
0193               port->serial->dev,
0194               usb_sndbulkpipe(port->serial->dev,
0195                       port->bulk_out_endpointAddress),
0196               port->write_urb->transfer_buffer, 4, iuu_rxcmd, port);
0197     result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
0198     priv->reset = 0;
0199     return result;
0200 }
0201 
0202 /* Status Function
0203  * Return value is
0204  * 0x00 = no card
0205  * 0x01 = smartcard
0206  * 0x02 = sim card
0207  */
0208 static void iuu_update_status_callback(struct urb *urb)
0209 {
0210     struct usb_serial_port *port = urb->context;
0211     struct iuu_private *priv = usb_get_serial_port_data(port);
0212     u8 *st;
0213     int status = urb->status;
0214 
0215     if (status) {
0216         dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
0217         /* error stop all */
0218         return;
0219     }
0220 
0221     st = urb->transfer_buffer;
0222     dev_dbg(&port->dev, "%s - enter\n", __func__);
0223     if (urb->actual_length == 1) {
0224         switch (st[0]) {
0225         case 0x1:
0226             priv->tiostatus = iuu_cardout;
0227             break;
0228         case 0x0:
0229             priv->tiostatus = iuu_cardin;
0230             break;
0231         default:
0232             priv->tiostatus = iuu_cardin;
0233         }
0234     }
0235     iuu_rxcmd(urb);
0236 }
0237 
0238 static void iuu_status_callback(struct urb *urb)
0239 {
0240     struct usb_serial_port *port = urb->context;
0241     int status = urb->status;
0242 
0243     dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
0244     usb_fill_bulk_urb(port->read_urb, port->serial->dev,
0245               usb_rcvbulkpipe(port->serial->dev,
0246                       port->bulk_in_endpointAddress),
0247               port->read_urb->transfer_buffer, 256,
0248               iuu_update_status_callback, port);
0249     usb_submit_urb(port->read_urb, GFP_ATOMIC);
0250 }
0251 
0252 static int iuu_status(struct usb_serial_port *port)
0253 {
0254     int result;
0255 
0256     memset(port->write_urb->transfer_buffer, IUU_GET_STATE_REGISTER, 1);
0257     usb_fill_bulk_urb(port->write_urb, port->serial->dev,
0258               usb_sndbulkpipe(port->serial->dev,
0259                       port->bulk_out_endpointAddress),
0260               port->write_urb->transfer_buffer, 1,
0261               iuu_status_callback, port);
0262     result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
0263     return result;
0264 
0265 }
0266 
0267 static int bulk_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
0268 {
0269     int status;
0270     struct usb_serial *serial = port->serial;
0271     int actual = 0;
0272 
0273     /* send the data out the bulk port */
0274 
0275     status =
0276         usb_bulk_msg(serial->dev,
0277              usb_sndbulkpipe(serial->dev,
0278                      port->bulk_out_endpointAddress), buf,
0279              count, &actual, 1000);
0280 
0281     if (status != IUU_OPERATION_OK)
0282         dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
0283     else
0284         dev_dbg(&port->dev, "%s - write OK !\n", __func__);
0285     return status;
0286 }
0287 
0288 static int read_immediate(struct usb_serial_port *port, u8 *buf, u8 count)
0289 {
0290     int status;
0291     struct usb_serial *serial = port->serial;
0292     int actual = 0;
0293 
0294     /* send the data out the bulk port */
0295     status =
0296         usb_bulk_msg(serial->dev,
0297              usb_rcvbulkpipe(serial->dev,
0298                      port->bulk_in_endpointAddress), buf,
0299              count, &actual, 1000);
0300 
0301     if (status != IUU_OPERATION_OK)
0302         dev_dbg(&port->dev, "%s - error = %2x\n", __func__, status);
0303     else
0304         dev_dbg(&port->dev, "%s - read OK !\n", __func__);
0305     return status;
0306 }
0307 
0308 static int iuu_led(struct usb_serial_port *port, unsigned int R,
0309            unsigned int G, unsigned int B, u8 f)
0310 {
0311     int status;
0312     u8 *buf;
0313     buf = kmalloc(8, GFP_KERNEL);
0314     if (!buf)
0315         return -ENOMEM;
0316 
0317     buf[0] = IUU_SET_LED;
0318     buf[1] = R & 0xFF;
0319     buf[2] = (R >> 8) & 0xFF;
0320     buf[3] = G & 0xFF;
0321     buf[4] = (G >> 8) & 0xFF;
0322     buf[5] = B & 0xFF;
0323     buf[6] = (B >> 8) & 0xFF;
0324     buf[7] = f;
0325     status = bulk_immediate(port, buf, 8);
0326     kfree(buf);
0327     if (status != IUU_OPERATION_OK)
0328         dev_dbg(&port->dev, "%s - led error status = %2x\n", __func__, status);
0329     else
0330         dev_dbg(&port->dev, "%s - led OK !\n", __func__);
0331     return IUU_OPERATION_OK;
0332 }
0333 
0334 static void iuu_rgbf_fill_buffer(u8 *buf, u8 r1, u8 r2, u8 g1, u8 g2, u8 b1,
0335                  u8 b2, u8 freq)
0336 {
0337     *buf++ = IUU_SET_LED;
0338     *buf++ = r1;
0339     *buf++ = r2;
0340     *buf++ = g1;
0341     *buf++ = g2;
0342     *buf++ = b1;
0343     *buf++ = b2;
0344     *buf = freq;
0345 }
0346 
0347 static void iuu_led_activity_on(struct urb *urb)
0348 {
0349     struct usb_serial_port *port = urb->context;
0350     char *buf_ptr = port->write_urb->transfer_buffer;
0351 
0352     if (xmas) {
0353         buf_ptr[0] = IUU_SET_LED;
0354         get_random_bytes(buf_ptr + 1, 6);
0355         buf_ptr[7] = 1;
0356     } else {
0357         iuu_rgbf_fill_buffer(buf_ptr, 255, 255, 0, 0, 0, 0, 255);
0358     }
0359 
0360     usb_fill_bulk_urb(port->write_urb, port->serial->dev,
0361               usb_sndbulkpipe(port->serial->dev,
0362                       port->bulk_out_endpointAddress),
0363               port->write_urb->transfer_buffer, 8 ,
0364               iuu_rxcmd, port);
0365     usb_submit_urb(port->write_urb, GFP_ATOMIC);
0366 }
0367 
0368 static void iuu_led_activity_off(struct urb *urb)
0369 {
0370     struct usb_serial_port *port = urb->context;
0371     char *buf_ptr = port->write_urb->transfer_buffer;
0372 
0373     if (xmas) {
0374         iuu_rxcmd(urb);
0375         return;
0376     }
0377 
0378     iuu_rgbf_fill_buffer(buf_ptr, 0, 0, 255, 255, 0, 0, 255);
0379 
0380     usb_fill_bulk_urb(port->write_urb, port->serial->dev,
0381               usb_sndbulkpipe(port->serial->dev,
0382                       port->bulk_out_endpointAddress),
0383               port->write_urb->transfer_buffer, 8 ,
0384               iuu_rxcmd, port);
0385     usb_submit_urb(port->write_urb, GFP_ATOMIC);
0386 }
0387 
0388 
0389 
0390 static int iuu_clk(struct usb_serial_port *port, int dwFrq)
0391 {
0392     int status;
0393     struct iuu_private *priv = usb_get_serial_port_data(port);
0394     int Count = 0;
0395     u8 FrqGenAdr = 0x69;
0396     u8 DIV = 0;     /* 8bit */
0397     u8 XDRV = 0;        /* 8bit */
0398     u8 PUMP = 0;        /* 3bit */
0399     u8 PBmsb = 0;       /* 2bit */
0400     u8 PBlsb = 0;       /* 8bit */
0401     u8 PO = 0;      /* 1bit */
0402     u8 Q = 0;       /* 7bit */
0403     /* 24bit = 3bytes */
0404     unsigned int P = 0;
0405     unsigned int P2 = 0;
0406     int frq = (int)dwFrq;
0407 
0408     if (frq == 0) {
0409         priv->buf[Count++] = IUU_UART_WRITE_I2C;
0410         priv->buf[Count++] = FrqGenAdr << 1;
0411         priv->buf[Count++] = 0x09;
0412         priv->buf[Count++] = 0x00;
0413 
0414         status = bulk_immediate(port, (u8 *) priv->buf, Count);
0415         if (status != 0) {
0416             dev_dbg(&port->dev, "%s - write error\n", __func__);
0417             return status;
0418         }
0419     } else if (frq == 3579000) {
0420         DIV = 100;
0421         P = 1193;
0422         Q = 40;
0423         XDRV = 0;
0424     } else if (frq == 3680000) {
0425         DIV = 105;
0426         P = 161;
0427         Q = 5;
0428         XDRV = 0;
0429     } else if (frq == 6000000) {
0430         DIV = 66;
0431         P = 66;
0432         Q = 2;
0433         XDRV = 0x28;
0434     } else {
0435         unsigned int result = 0;
0436         unsigned int tmp = 0;
0437         unsigned int check;
0438         unsigned int check2;
0439         char found = 0x00;
0440         unsigned int lQ = 2;
0441         unsigned int lP = 2055;
0442         unsigned int lDiv = 4;
0443 
0444         for (lQ = 2; lQ <= 47 && !found; lQ++)
0445             for (lP = 2055; lP >= 8 && !found; lP--)
0446                 for (lDiv = 4; lDiv <= 127 && !found; lDiv++) {
0447                     tmp = (12000000 / lDiv) * (lP / lQ);
0448                     if (abs((int)(tmp - frq)) <
0449                         abs((int)(frq - result))) {
0450                         check2 = (12000000 / lQ);
0451                         if (check2 < 250000)
0452                             continue;
0453                         check = (12000000 / lQ) * lP;
0454                         if (check > 400000000)
0455                             continue;
0456                         if (check < 100000000)
0457                             continue;
0458                         if (lDiv < 4 || lDiv > 127)
0459                             continue;
0460                         result = tmp;
0461                         P = lP;
0462                         DIV = lDiv;
0463                         Q = lQ;
0464                         if (result == frq)
0465                             found = 0x01;
0466                     }
0467                 }
0468     }
0469     P2 = ((P - PO) / 2) - 4;
0470     PUMP = 0x04;
0471     PBmsb = (P2 >> 8 & 0x03);
0472     PBlsb = P2 & 0xFF;
0473     PO = (P >> 10) & 0x01;
0474     Q = Q - 2;
0475 
0476     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /* 0x4C */
0477     priv->buf[Count++] = FrqGenAdr << 1;
0478     priv->buf[Count++] = 0x09;
0479     priv->buf[Count++] = 0x20;  /* Adr = 0x09 */
0480     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /* 0x4C */
0481     priv->buf[Count++] = FrqGenAdr << 1;
0482     priv->buf[Count++] = 0x0C;
0483     priv->buf[Count++] = DIV;   /* Adr = 0x0C */
0484     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /* 0x4C */
0485     priv->buf[Count++] = FrqGenAdr << 1;
0486     priv->buf[Count++] = 0x12;
0487     priv->buf[Count++] = XDRV;  /* Adr = 0x12 */
0488     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /*  0x4C */
0489     priv->buf[Count++] = FrqGenAdr << 1;
0490     priv->buf[Count++] = 0x13;
0491     priv->buf[Count++] = 0x6B;  /* Adr = 0x13 */
0492     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /*  0x4C */
0493     priv->buf[Count++] = FrqGenAdr << 1;
0494     priv->buf[Count++] = 0x40;
0495     priv->buf[Count++] = (0xC0 | ((PUMP & 0x07) << 2)) |
0496                  (PBmsb & 0x03);    /* Adr = 0x40 */
0497     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /*  0x4C */
0498     priv->buf[Count++] = FrqGenAdr << 1;
0499     priv->buf[Count++] = 0x41;
0500     priv->buf[Count++] = PBlsb; /* Adr = 0x41 */
0501     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /*  0x4C */
0502     priv->buf[Count++] = FrqGenAdr << 1;
0503     priv->buf[Count++] = 0x42;
0504     priv->buf[Count++] = Q | (((PO & 0x01) << 7));  /* Adr = 0x42 */
0505     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /*  0x4C */
0506     priv->buf[Count++] = FrqGenAdr << 1;
0507     priv->buf[Count++] = 0x44;
0508     priv->buf[Count++] = (char)0xFF;    /* Adr = 0x44 */
0509     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /*  0x4C */
0510     priv->buf[Count++] = FrqGenAdr << 1;
0511     priv->buf[Count++] = 0x45;
0512     priv->buf[Count++] = (char)0xFE;    /* Adr = 0x45 */
0513     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /*  0x4C */
0514     priv->buf[Count++] = FrqGenAdr << 1;
0515     priv->buf[Count++] = 0x46;
0516     priv->buf[Count++] = 0x7F;  /* Adr = 0x46 */
0517     priv->buf[Count++] = IUU_UART_WRITE_I2C;    /*  0x4C */
0518     priv->buf[Count++] = FrqGenAdr << 1;
0519     priv->buf[Count++] = 0x47;
0520     priv->buf[Count++] = (char)0x84;    /* Adr = 0x47 */
0521 
0522     status = bulk_immediate(port, (u8 *) priv->buf, Count);
0523     if (status != IUU_OPERATION_OK)
0524         dev_dbg(&port->dev, "%s - write error\n", __func__);
0525     return status;
0526 }
0527 
0528 static int iuu_uart_flush(struct usb_serial_port *port)
0529 {
0530     struct device *dev = &port->dev;
0531     int i;
0532     int status;
0533     u8 *rxcmd;
0534     struct iuu_private *priv = usb_get_serial_port_data(port);
0535 
0536     if (iuu_led(port, 0xF000, 0, 0, 0xFF) < 0)
0537         return -EIO;
0538 
0539     rxcmd = kmalloc(1, GFP_KERNEL);
0540     if (!rxcmd)
0541         return -ENOMEM;
0542 
0543     rxcmd[0] = IUU_UART_RX;
0544 
0545     for (i = 0; i < 2; i++) {
0546         status = bulk_immediate(port, rxcmd, 1);
0547         if (status != IUU_OPERATION_OK) {
0548             dev_dbg(dev, "%s - uart_flush_write error\n", __func__);
0549             goto out_free;
0550         }
0551 
0552         status = read_immediate(port, &priv->len, 1);
0553         if (status != IUU_OPERATION_OK) {
0554             dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
0555             goto out_free;
0556         }
0557 
0558         if (priv->len > 0) {
0559             dev_dbg(dev, "%s - uart_flush datalen is : %i\n", __func__, priv->len);
0560             status = read_immediate(port, priv->buf, priv->len);
0561             if (status != IUU_OPERATION_OK) {
0562                 dev_dbg(dev, "%s - uart_flush_read error\n", __func__);
0563                 goto out_free;
0564             }
0565         }
0566     }
0567     dev_dbg(dev, "%s - uart_flush_read OK!\n", __func__);
0568     iuu_led(port, 0, 0xF000, 0, 0xFF);
0569 
0570 out_free:
0571     kfree(rxcmd);
0572 
0573     return status;
0574 }
0575 
0576 static void read_buf_callback(struct urb *urb)
0577 {
0578     struct usb_serial_port *port = urb->context;
0579     unsigned char *data = urb->transfer_buffer;
0580     int status = urb->status;
0581 
0582     if (status) {
0583         if (status == -EPROTO) {
0584             /* reschedule needed */
0585         }
0586         return;
0587     }
0588 
0589     dev_dbg(&port->dev, "%s - %i chars to write\n", __func__, urb->actual_length);
0590 
0591     if (urb->actual_length) {
0592         tty_insert_flip_string(&port->port, data, urb->actual_length);
0593         tty_flip_buffer_push(&port->port);
0594     }
0595     iuu_led_activity_on(urb);
0596 }
0597 
0598 static int iuu_bulk_write(struct usb_serial_port *port)
0599 {
0600     struct iuu_private *priv = usb_get_serial_port_data(port);
0601     unsigned long flags;
0602     int result;
0603     int buf_len;
0604     char *buf_ptr = port->write_urb->transfer_buffer;
0605 
0606     spin_lock_irqsave(&priv->lock, flags);
0607     *buf_ptr++ = IUU_UART_ESC;
0608     *buf_ptr++ = IUU_UART_TX;
0609     *buf_ptr++ = priv->writelen;
0610 
0611     memcpy(buf_ptr, priv->writebuf, priv->writelen);
0612     buf_len = priv->writelen;
0613     priv->writelen = 0;
0614     spin_unlock_irqrestore(&priv->lock, flags);
0615     dev_dbg(&port->dev, "%s - writing %i chars : %*ph\n", __func__,
0616         buf_len, buf_len, buf_ptr);
0617     usb_fill_bulk_urb(port->write_urb, port->serial->dev,
0618               usb_sndbulkpipe(port->serial->dev,
0619                       port->bulk_out_endpointAddress),
0620               port->write_urb->transfer_buffer, buf_len + 3,
0621               iuu_rxcmd, port);
0622     result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
0623     usb_serial_port_softint(port);
0624     return result;
0625 }
0626 
0627 static int iuu_read_buf(struct usb_serial_port *port, int len)
0628 {
0629     int result;
0630 
0631     usb_fill_bulk_urb(port->read_urb, port->serial->dev,
0632               usb_rcvbulkpipe(port->serial->dev,
0633                       port->bulk_in_endpointAddress),
0634               port->read_urb->transfer_buffer, len,
0635               read_buf_callback, port);
0636     result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
0637     return result;
0638 }
0639 
0640 static void iuu_uart_read_callback(struct urb *urb)
0641 {
0642     struct usb_serial_port *port = urb->context;
0643     struct iuu_private *priv = usb_get_serial_port_data(port);
0644     unsigned long flags;
0645     int status = urb->status;
0646     int len = 0;
0647     unsigned char *data = urb->transfer_buffer;
0648     priv->poll++;
0649 
0650     if (status) {
0651         dev_dbg(&port->dev, "%s - status = %d\n", __func__, status);
0652         /* error stop all */
0653         return;
0654     }
0655 
0656     if (urb->actual_length == 1)
0657         len = (int) data[0];
0658 
0659     if (urb->actual_length > 1) {
0660         dev_dbg(&port->dev, "%s - urb->actual_length = %i\n", __func__,
0661             urb->actual_length);
0662         return;
0663     }
0664     /* if len > 0 call readbuf */
0665 
0666     if (len > 0) {
0667         dev_dbg(&port->dev, "%s - call read buf - len to read is %i\n",
0668             __func__, len);
0669         status = iuu_read_buf(port, len);
0670         return;
0671     }
0672     /* need to update status  ? */
0673     if (priv->poll > 99) {
0674         status = iuu_status(port);
0675         priv->poll = 0;
0676         return;
0677     }
0678 
0679     /* reset waiting ? */
0680 
0681     if (priv->reset == 1) {
0682         status = iuu_reset(port, 0xC);
0683         return;
0684     }
0685     /* Writebuf is waiting */
0686     spin_lock_irqsave(&priv->lock, flags);
0687     if (priv->writelen > 0) {
0688         spin_unlock_irqrestore(&priv->lock, flags);
0689         status = iuu_bulk_write(port);
0690         return;
0691     }
0692     spin_unlock_irqrestore(&priv->lock, flags);
0693     /* if nothing to write call again rxcmd */
0694     dev_dbg(&port->dev, "%s - rxcmd recall\n", __func__);
0695     iuu_led_activity_off(urb);
0696 }
0697 
0698 static int iuu_uart_write(struct tty_struct *tty, struct usb_serial_port *port,
0699               const u8 *buf, int count)
0700 {
0701     struct iuu_private *priv = usb_get_serial_port_data(port);
0702     unsigned long flags;
0703 
0704     spin_lock_irqsave(&priv->lock, flags);
0705 
0706     count = min(count, 256 - priv->writelen);
0707     if (count == 0)
0708         goto out;
0709 
0710     /* fill the buffer */
0711     memcpy(priv->writebuf + priv->writelen, buf, count);
0712     priv->writelen += count;
0713 out:
0714     spin_unlock_irqrestore(&priv->lock, flags);
0715 
0716     return count;
0717 }
0718 
0719 static void read_rxcmd_callback(struct urb *urb)
0720 {
0721     struct usb_serial_port *port = urb->context;
0722     int result;
0723     int status = urb->status;
0724 
0725     if (status) {
0726         /* error stop all */
0727         return;
0728     }
0729 
0730     usb_fill_bulk_urb(port->read_urb, port->serial->dev,
0731               usb_rcvbulkpipe(port->serial->dev,
0732                       port->bulk_in_endpointAddress),
0733               port->read_urb->transfer_buffer, 256,
0734               iuu_uart_read_callback, port);
0735     result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
0736     dev_dbg(&port->dev, "%s - submit result = %d\n", __func__, result);
0737 }
0738 
0739 static int iuu_uart_on(struct usb_serial_port *port)
0740 {
0741     int status;
0742     u8 *buf;
0743 
0744     buf = kmalloc(4, GFP_KERNEL);
0745 
0746     if (!buf)
0747         return -ENOMEM;
0748 
0749     buf[0] = IUU_UART_ENABLE;
0750     buf[1] = (u8) ((IUU_BAUD_9600 >> 8) & 0x00FF);
0751     buf[2] = (u8) (0x00FF & IUU_BAUD_9600);
0752     buf[3] = (u8) (0x0F0 & IUU_ONE_STOP_BIT) | (0x07 & IUU_PARITY_EVEN);
0753 
0754     status = bulk_immediate(port, buf, 4);
0755     if (status != IUU_OPERATION_OK) {
0756         dev_dbg(&port->dev, "%s - uart_on error\n", __func__);
0757         goto uart_enable_failed;
0758     }
0759     /*  iuu_reset() the card after iuu_uart_on() */
0760     status = iuu_uart_flush(port);
0761     if (status != IUU_OPERATION_OK)
0762         dev_dbg(&port->dev, "%s - uart_flush error\n", __func__);
0763 uart_enable_failed:
0764     kfree(buf);
0765     return status;
0766 }
0767 
0768 /*  Disables the IUU UART (a.k.a. the Phoenix voiderface) */
0769 static int iuu_uart_off(struct usb_serial_port *port)
0770 {
0771     int status;
0772     u8 *buf;
0773     buf = kmalloc(1, GFP_KERNEL);
0774     if (!buf)
0775         return -ENOMEM;
0776     buf[0] = IUU_UART_DISABLE;
0777 
0778     status = bulk_immediate(port, buf, 1);
0779     if (status != IUU_OPERATION_OK)
0780         dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
0781 
0782     kfree(buf);
0783     return status;
0784 }
0785 
0786 static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
0787              u32 *actual, u8 parity)
0788 {
0789     int status;
0790     u32 baud;
0791     u8 *dataout;
0792     u8 DataCount = 0;
0793     u8 T1Frekvens = 0;
0794     u8 T1reload = 0;
0795     unsigned int T1FrekvensHZ = 0;
0796 
0797     dev_dbg(&port->dev, "%s - enter baud_base=%d\n", __func__, baud_base);
0798     dataout = kmalloc(5, GFP_KERNEL);
0799 
0800     if (!dataout)
0801         return -ENOMEM;
0802     /*baud = (((priv->clk / 35) * baud_base) / 100000); */
0803     baud = baud_base;
0804 
0805     if (baud < 1200 || baud > 230400) {
0806         kfree(dataout);
0807         return IUU_INVALID_PARAMETER;
0808     }
0809     if (baud > 977) {
0810         T1Frekvens = 3;
0811         T1FrekvensHZ = 500000;
0812     }
0813 
0814     if (baud > 3906) {
0815         T1Frekvens = 2;
0816         T1FrekvensHZ = 2000000;
0817     }
0818 
0819     if (baud > 11718) {
0820         T1Frekvens = 1;
0821         T1FrekvensHZ = 6000000;
0822     }
0823 
0824     if (baud > 46875) {
0825         T1Frekvens = 0;
0826         T1FrekvensHZ = 24000000;
0827     }
0828 
0829     T1reload = 256 - (u8) (T1FrekvensHZ / (baud * 2));
0830 
0831     /*  magic number here:  ENTER_FIRMWARE_UPDATE; */
0832     dataout[DataCount++] = IUU_UART_ESC;
0833     /*  magic number here:  CHANGE_BAUD; */
0834     dataout[DataCount++] = IUU_UART_CHANGE;
0835     dataout[DataCount++] = T1Frekvens;
0836     dataout[DataCount++] = T1reload;
0837 
0838     *actual = (T1FrekvensHZ / (256 - T1reload)) / 2;
0839 
0840     switch (parity & 0x0F) {
0841     case IUU_PARITY_NONE:
0842         dataout[DataCount++] = 0x00;
0843         break;
0844     case IUU_PARITY_EVEN:
0845         dataout[DataCount++] = 0x01;
0846         break;
0847     case IUU_PARITY_ODD:
0848         dataout[DataCount++] = 0x02;
0849         break;
0850     case IUU_PARITY_MARK:
0851         dataout[DataCount++] = 0x03;
0852         break;
0853     case IUU_PARITY_SPACE:
0854         dataout[DataCount++] = 0x04;
0855         break;
0856     default:
0857         kfree(dataout);
0858         return IUU_INVALID_PARAMETER;
0859     }
0860 
0861     switch (parity & 0xF0) {
0862     case IUU_ONE_STOP_BIT:
0863         dataout[DataCount - 1] |= IUU_ONE_STOP_BIT;
0864         break;
0865 
0866     case IUU_TWO_STOP_BITS:
0867         dataout[DataCount - 1] |= IUU_TWO_STOP_BITS;
0868         break;
0869     default:
0870         kfree(dataout);
0871         return IUU_INVALID_PARAMETER;
0872     }
0873 
0874     status = bulk_immediate(port, dataout, DataCount);
0875     if (status != IUU_OPERATION_OK)
0876         dev_dbg(&port->dev, "%s - uart_off error\n", __func__);
0877     kfree(dataout);
0878     return status;
0879 }
0880 
0881 static void iuu_set_termios(struct tty_struct *tty,
0882         struct usb_serial_port *port, struct ktermios *old_termios)
0883 {
0884     const u32 supported_mask = CMSPAR|PARENB|PARODD;
0885     struct iuu_private *priv = usb_get_serial_port_data(port);
0886     unsigned int cflag = tty->termios.c_cflag;
0887     int status;
0888     u32 actual;
0889     u32 parity;
0890     int csize = CS7;
0891     int baud;
0892     u32 newval = cflag & supported_mask;
0893 
0894     /* Just use the ospeed. ispeed should be the same. */
0895     baud = tty->termios.c_ospeed;
0896 
0897     dev_dbg(&port->dev, "%s - enter c_ospeed or baud=%d\n", __func__, baud);
0898 
0899     /* compute the parity parameter */
0900     parity = 0;
0901     if (cflag & CMSPAR) {   /* Using mark space */
0902         if (cflag & PARODD)
0903             parity |= IUU_PARITY_SPACE;
0904         else
0905             parity |= IUU_PARITY_MARK;
0906     } else if (!(cflag & PARENB)) {
0907         parity |= IUU_PARITY_NONE;
0908         csize = CS8;
0909     } else if (cflag & PARODD)
0910         parity |= IUU_PARITY_ODD;
0911     else
0912         parity |= IUU_PARITY_EVEN;
0913 
0914     parity |= (cflag & CSTOPB ? IUU_TWO_STOP_BITS : IUU_ONE_STOP_BIT);
0915 
0916     /* set it */
0917     status = iuu_uart_baud(port,
0918             baud * priv->boost / 100,
0919             &actual, parity);
0920 
0921     /* set the termios value to the real one, so the user now what has
0922      * changed. We support few fields so its easies to copy the old hw
0923      * settings back over and then adjust them
0924      */
0925     if (old_termios)
0926         tty_termios_copy_hw(&tty->termios, old_termios);
0927     if (status != 0)    /* Set failed - return old bits */
0928         return;
0929     /* Re-encode speed, parity and csize */
0930     tty_encode_baud_rate(tty, baud, baud);
0931     tty->termios.c_cflag &= ~(supported_mask|CSIZE);
0932     tty->termios.c_cflag |= newval | csize;
0933 }
0934 
0935 static void iuu_close(struct usb_serial_port *port)
0936 {
0937     /* iuu_led (port,255,0,0,0); */
0938 
0939     iuu_uart_off(port);
0940 
0941     usb_kill_urb(port->write_urb);
0942     usb_kill_urb(port->read_urb);
0943 
0944     iuu_led(port, 0, 0, 0xF000, 0xFF);
0945 }
0946 
0947 static void iuu_init_termios(struct tty_struct *tty)
0948 {
0949     tty->termios.c_cflag = B9600 | CS8 | CSTOPB | CREAD | PARENB | CLOCAL;
0950     tty->termios.c_ispeed = 9600;
0951     tty->termios.c_ospeed = 9600;
0952     tty->termios.c_lflag = 0;
0953     tty->termios.c_oflag = 0;
0954     tty->termios.c_iflag = 0;
0955 }
0956 
0957 static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
0958 {
0959     struct usb_serial *serial = port->serial;
0960     struct device *dev = &port->dev;
0961     int result;
0962     int baud;
0963     u32 actual;
0964     struct iuu_private *priv = usb_get_serial_port_data(port);
0965 
0966     baud = tty->termios.c_ospeed;
0967 
0968     dev_dbg(dev, "%s - baud %d\n", __func__, baud);
0969     usb_clear_halt(serial->dev, port->write_urb->pipe);
0970     usb_clear_halt(serial->dev, port->read_urb->pipe);
0971 
0972     priv->poll = 0;
0973 
0974 #define SOUP(a, b, c, d)  do { \
0975     result = usb_control_msg(port->serial->dev, \
0976                 usb_sndctrlpipe(port->serial->dev, 0),  \
0977                 b, a, c, d, NULL, 0, 1000); \
0978     dev_dbg(dev, "0x%x:0x%x:0x%x:0x%x  %d\n", a, b, c, d, result); } while (0)
0979 
0980     /*  This is not UART related but IUU USB driver related or something */
0981     /*  like that. Basically no IUU will accept any commands from the USB */
0982     /*  host unless it has received the following message */
0983     /* sprintf(buf ,"%c%c%c%c",0x03,0x02,0x02,0x0); */
0984 
0985     SOUP(0x03, 0x02, 0x02, 0x0);
0986 
0987     iuu_led(port, 0xF000, 0xF000, 0, 0xFF);
0988     iuu_uart_on(port);
0989     if (boost < 100)
0990         boost = 100;
0991     priv->boost = boost;
0992     switch (clockmode) {
0993     case 2:     /*  3.680 Mhz */
0994         priv->clk = IUU_CLK_3680000;
0995         iuu_clk(port, IUU_CLK_3680000 * boost / 100);
0996         result =
0997             iuu_uart_baud(port, baud * boost / 100, &actual,
0998                   IUU_PARITY_EVEN);
0999         break;
1000     case 3:     /*  6.00 Mhz */
1001         iuu_clk(port, IUU_CLK_6000000 * boost / 100);
1002         priv->clk = IUU_CLK_6000000;
1003         /* Ratio of 6000000 to 3500000 for baud 9600 */
1004         result =
1005             iuu_uart_baud(port, 16457 * boost / 100, &actual,
1006                   IUU_PARITY_EVEN);
1007         break;
1008     default:        /*  3.579 Mhz */
1009         iuu_clk(port, IUU_CLK_3579000 * boost / 100);
1010         priv->clk = IUU_CLK_3579000;
1011         result =
1012             iuu_uart_baud(port, baud * boost / 100, &actual,
1013                   IUU_PARITY_EVEN);
1014     }
1015 
1016     /* set the cardin cardout signals */
1017     switch (cdmode) {
1018     case 0:
1019         iuu_cardin = 0;
1020         iuu_cardout = 0;
1021         break;
1022     case 1:
1023         iuu_cardin = TIOCM_CD;
1024         iuu_cardout =  0;
1025         break;
1026     case 2:
1027         iuu_cardin = 0;
1028         iuu_cardout = TIOCM_CD;
1029         break;
1030     case 3:
1031         iuu_cardin = TIOCM_DSR;
1032         iuu_cardout = 0;
1033         break;
1034     case 4:
1035         iuu_cardin = 0;
1036         iuu_cardout = TIOCM_DSR;
1037         break;
1038     case 5:
1039         iuu_cardin = TIOCM_CTS;
1040         iuu_cardout = 0;
1041         break;
1042     case 6:
1043         iuu_cardin = 0;
1044         iuu_cardout = TIOCM_CTS;
1045         break;
1046     case 7:
1047         iuu_cardin = TIOCM_RNG;
1048         iuu_cardout = 0;
1049         break;
1050     case 8:
1051         iuu_cardin = 0;
1052         iuu_cardout = TIOCM_RNG;
1053     }
1054 
1055     iuu_uart_flush(port);
1056 
1057     dev_dbg(dev, "%s - initialization done\n", __func__);
1058 
1059     memset(port->write_urb->transfer_buffer, IUU_UART_RX, 1);
1060     usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1061               usb_sndbulkpipe(port->serial->dev,
1062                       port->bulk_out_endpointAddress),
1063               port->write_urb->transfer_buffer, 1,
1064               read_rxcmd_callback, port);
1065     result = usb_submit_urb(port->write_urb, GFP_KERNEL);
1066     if (result) {
1067         dev_err(dev, "%s - failed submitting read urb, error %d\n", __func__, result);
1068         iuu_close(port);
1069     } else {
1070         dev_dbg(dev, "%s - rxcmd OK\n", __func__);
1071     }
1072 
1073     return result;
1074 }
1075 
1076 /* how to change VCC */
1077 static int iuu_vcc_set(struct usb_serial_port *port, unsigned int vcc)
1078 {
1079     int status;
1080     u8 *buf;
1081 
1082     buf = kmalloc(5, GFP_KERNEL);
1083     if (!buf)
1084         return -ENOMEM;
1085 
1086     buf[0] = IUU_SET_VCC;
1087     buf[1] = vcc & 0xFF;
1088     buf[2] = (vcc >> 8) & 0xFF;
1089     buf[3] = (vcc >> 16) & 0xFF;
1090     buf[4] = (vcc >> 24) & 0xFF;
1091 
1092     status = bulk_immediate(port, buf, 5);
1093     kfree(buf);
1094 
1095     if (status != IUU_OPERATION_OK)
1096         dev_dbg(&port->dev, "%s - vcc error status = %2x\n", __func__, status);
1097     else
1098         dev_dbg(&port->dev, "%s - vcc OK !\n", __func__);
1099 
1100     return status;
1101 }
1102 
1103 /*
1104  * Sysfs Attributes
1105  */
1106 
1107 static ssize_t vcc_mode_show(struct device *dev,
1108     struct device_attribute *attr, char *buf)
1109 {
1110     struct usb_serial_port *port = to_usb_serial_port(dev);
1111     struct iuu_private *priv = usb_get_serial_port_data(port);
1112 
1113     return sprintf(buf, "%d\n", priv->vcc);
1114 }
1115 
1116 static ssize_t vcc_mode_store(struct device *dev,
1117     struct device_attribute *attr, const char *buf, size_t count)
1118 {
1119     struct usb_serial_port *port = to_usb_serial_port(dev);
1120     struct iuu_private *priv = usb_get_serial_port_data(port);
1121     unsigned long v;
1122 
1123     if (kstrtoul(buf, 10, &v)) {
1124         dev_err(dev, "%s - vcc_mode: %s is not a unsigned long\n",
1125                 __func__, buf);
1126         goto fail_store_vcc_mode;
1127     }
1128 
1129     dev_dbg(dev, "%s: setting vcc_mode = %ld\n", __func__, v);
1130 
1131     if ((v != 3) && (v != 5)) {
1132         dev_err(dev, "%s - vcc_mode %ld is invalid\n", __func__, v);
1133     } else {
1134         iuu_vcc_set(port, v);
1135         priv->vcc = v;
1136     }
1137 fail_store_vcc_mode:
1138     return count;
1139 }
1140 static DEVICE_ATTR_RW(vcc_mode);
1141 
1142 static int iuu_create_sysfs_attrs(struct usb_serial_port *port)
1143 {
1144     return device_create_file(&port->dev, &dev_attr_vcc_mode);
1145 }
1146 
1147 static int iuu_remove_sysfs_attrs(struct usb_serial_port *port)
1148 {
1149     device_remove_file(&port->dev, &dev_attr_vcc_mode);
1150     return 0;
1151 }
1152 
1153 /*
1154  * End Sysfs Attributes
1155  */
1156 
1157 static struct usb_serial_driver iuu_device = {
1158     .driver = {
1159            .owner = THIS_MODULE,
1160            .name = "iuu_phoenix",
1161            },
1162     .id_table = id_table,
1163     .num_ports = 1,
1164     .num_bulk_in = 1,
1165     .num_bulk_out = 1,
1166     .bulk_in_size = 512,
1167     .bulk_out_size = 512,
1168     .open = iuu_open,
1169     .close = iuu_close,
1170     .write = iuu_uart_write,
1171     .read_bulk_callback = iuu_uart_read_callback,
1172     .tiocmget = iuu_tiocmget,
1173     .tiocmset = iuu_tiocmset,
1174     .set_termios = iuu_set_termios,
1175     .init_termios = iuu_init_termios,
1176     .port_probe = iuu_port_probe,
1177     .port_remove = iuu_port_remove,
1178 };
1179 
1180 static struct usb_serial_driver * const serial_drivers[] = {
1181     &iuu_device, NULL
1182 };
1183 
1184 module_usb_serial_driver(serial_drivers, id_table);
1185 
1186 MODULE_AUTHOR("Alain Degreffe eczema@ecze.com");
1187 
1188 MODULE_DESCRIPTION(DRIVER_DESC);
1189 MODULE_LICENSE("GPL");
1190 
1191 module_param(xmas, bool, 0644);
1192 MODULE_PARM_DESC(xmas, "Xmas colors enabled or not");
1193 
1194 module_param(boost, int, 0644);
1195 MODULE_PARM_DESC(boost, "Card overclock boost (in percent 100-500)");
1196 
1197 module_param(clockmode, int, 0644);
1198 MODULE_PARM_DESC(clockmode, "Card clock mode (1=3.579 MHz, 2=3.680 MHz, "
1199         "3=6 Mhz)");
1200 
1201 module_param(cdmode, int, 0644);
1202 MODULE_PARM_DESC(cdmode, "Card detect mode (0=none, 1=CD, 2=!CD, 3=DSR, "
1203          "4=!DSR, 5=CTS, 6=!CTS, 7=RING, 8=!RING)");
1204 
1205 module_param(vcc_default, int, 0644);
1206 MODULE_PARM_DESC(vcc_default, "Set default VCC (either 3 for 3.3V or 5 "
1207         "for 5V). Default to 5.");
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