drivers/net/irda/smsc-ircc2.c

   1 /*********************************************************************
   2  * $Id: smsc-ircc2.c,v 1.19.2.5 2002/10/27 11:34:26 dip Exp $
   3  *
   4  * Description:   Driver for the SMC Infrared Communications Controller
   5  * Status:        Experimental.
   6  * Author:        Daniele Peri (peri@csai.unipa.it)
   7  * Created at:
   8  * Modified at:
   9  * Modified by:
  10  *
  11  *     Copyright (c) 2002      Daniele Peri
  12  *     All Rights Reserved.
  13  *     Copyright (c) 2002      Jean Tourrilhes
  14  *
  15  *
  16  * Based on smc-ircc.c:
  17  *
  18  *     Copyright (c) 2001      Stefani Seibold
  19  *     Copyright (c) 1999-2001 Dag Brattli
  20  *     Copyright (c) 1998-1999 Thomas Davis,
  21  *
  22  *      and irport.c:
  23  *
  24  *     Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, All Rights Reserved.
  25  *
  26  *
  27  *     This program is free software; you can redistribute it and/or
  28  *     modify it under the terms of the GNU General Public License as
  29  *     published by the Free Software Foundation; either version 2 of
  30  *     the License, or (at your option) any later version.
  31  *
  32  *     This program is distributed in the hope that it will be useful,
  33  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  34  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  35  *     GNU General Public License for more details.
  36  *
  37  *     You should have received a copy of the GNU General Public License
  38  *     along with this program; if not, write to the Free Software
  39  *     Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  40  *     MA 02111-1307 USA
  41  *
  42  ********************************************************************/
  43
  44 #include <linux/module.h>
  45 #include <linux/kernel.h>
  46 #include <linux/types.h>
  47 #include <linux/skbuff.h>
  48 #include <linux/netdevice.h>
  49 #include <linux/ioport.h>
  50 #include <linux/delay.h>
  51 #include <linux/slab.h>
  52 #include <linux/init.h>
  53 #include <linux/rtnetlink.h>
  54 #include <linux/serial_reg.h>
  55 #include <linux/dma-mapping.h>
  56
  57 #include <asm/io.h>
  58 #include <asm/dma.h>
  59 #include <asm/byteorder.h>
  60
  61 #include <linux/spinlock.h>
  62 #include <linux/pm.h>
  63
  64 #include <net/irda/wrapper.h>
  65 #include <net/irda/irda.h>
  66 #include <net/irda/irda_device.h>
  67
  68 #include "smsc-ircc2.h"
  69 #include "smsc-sio.h"
  70
  71 /* Types */
  72
  73 struct smsc_transceiver {
  74         char *name;
  75         void (*set_for_speed)(int fir_base, u32 speed);
  76         int  (*probe)(int fir_base);
  77 };
  78 typedef struct smsc_transceiver smsc_transceiver_t;
  79
  80 #if 0
  81 struct smc_chip {
  82         char *name;
  83         u16 flags;
  84         u8 devid;
  85         u8 rev;
  86 };
  87 typedef struct smc_chip smc_chip_t;
  88 #endif
  89
  90 struct smsc_chip {
  91         char *name;
  92         #if 0
  93         u8      type;
  94         #endif
  95         u16 flags;
  96         u8 devid;
  97         u8 rev;
  98 };
  99 typedef struct smsc_chip smsc_chip_t;
 100
 101 struct smsc_chip_address {
 102         unsigned int cfg_base;
 103         unsigned int type;
 104 };
 105 typedef struct smsc_chip_address smsc_chip_address_t;
 106
 107 /* Private data for each instance */
 108 struct smsc_ircc_cb {
 109         struct net_device *netdev;     /* Yes! we are some kind of netdevice */
 110         struct net_device_stats stats;
 111         struct irlap_cb    *irlap; /* The link layer we are binded to */
 112
 113         chipio_t io;               /* IrDA controller information */
 114         iobuff_t tx_buff;          /* Transmit buffer */
 115         iobuff_t rx_buff;          /* Receive buffer */
 116         dma_addr_t tx_buff_dma;
 117         dma_addr_t rx_buff_dma;
 118
 119         struct qos_info qos;       /* QoS capabilities for this device */
 120
 121         spinlock_t lock;           /* For serializing operations */
 122
 123         __u32 new_speed;
 124         __u32 flags;               /* Interface flags */
 125
 126         int tx_buff_offsets[10];   /* Offsets between frames in tx_buff */
 127         int tx_len;                /* Number of frames in tx_buff */
 128
 129         int transceiver;
 130         struct pm_dev *pmdev;
 131 };
 132
 133 /* Constants */
 134
 135 static const char *driver_name = "smsc-ircc2";
 136 #define DIM(x)  (sizeof(x)/(sizeof(*(x))))
 137 #define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED        9600
 138 #define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER        1
 139 #define SMSC_IRCC2_C_NET_TIMEOUT                        0
 140 #define SMSC_IRCC2_C_SIR_STOP                   0
 141
 142 /* Prototypes */
 143
 144 static int smsc_ircc_open(unsigned int firbase, unsigned int sirbase, u8 dma, u8 irq);
 145 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base);
 146 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self, unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq);
 147 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self);
 148 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self);
 149 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self);
 150 static int  smsc_ircc_dma_receive(struct smsc_ircc_cb *self, int iobase);
 151 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self, int iobase);
 152 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self);
 153 static int  smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
 154 static int  smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
 155 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int iobase, int bofs);
 156 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self, int iobase);
 157 static void smsc_ircc_change_speed(void *priv, u32 speed);
 158 static void smsc_ircc_set_sir_speed(void *priv, u32 speed);
 159 static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
 160 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev);
 161 static void smsc_ircc_sir_start(struct smsc_ircc_cb *self);
 162 #if SMSC_IRCC2_C_SIR_STOP
 163 static void smsc_ircc_sir_stop(struct smsc_ircc_cb *self);
 164 #endif
 165 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self);
 166 static int  smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
 167 static int  smsc_ircc_net_open(struct net_device *dev);
 168 static int  smsc_ircc_net_close(struct net_device *dev);
 169 static int  smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 170 #if SMSC_IRCC2_C_NET_TIMEOUT
 171 static void smsc_ircc_timeout(struct net_device *dev);
 172 #endif
 173 static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev);
 174 static int  smsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
 175 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self);
 176 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self);
 177 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed);
 178 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self);
 179
 180 /* Probing */
 181 static int __init smsc_ircc_look_for_chips(void);
 182 static const smsc_chip_t * __init smsc_ircc_probe(unsigned short cfg_base,u8 reg,const smsc_chip_t *chip,char *type);
 183 static int __init smsc_superio_flat(const smsc_chip_t *chips, unsigned short cfg_base, char *type);
 184 static int __init smsc_superio_paged(const smsc_chip_t *chips, unsigned short cfg_base, char *type);
 185 static int __init smsc_superio_fdc(unsigned short cfg_base);
 186 static int __init smsc_superio_lpc(unsigned short cfg_base);
 187
 188 /* Transceivers specific functions */
 189
 190 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed);
 191 static int  smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base);
 192 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed);
 193 static int  smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base);
 194 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed);
 195 static int  smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base);
 196
 197 /* Power Management */
 198
 199 static void smsc_ircc_suspend(struct smsc_ircc_cb *self);
 200 static void smsc_ircc_wakeup(struct smsc_ircc_cb *self);
 201 static int smsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
 202
 203
 204 /* Transceivers for SMSC-ircc */
 205
 206 static smsc_transceiver_t smsc_transceivers[]=
 207 {
 208         { "Toshiba Satellite 1800 (GP data pin select)", smsc_ircc_set_transceiver_toshiba_sat1800, smsc_ircc_probe_transceiver_toshiba_sat1800},
 209         { "Fast pin select", smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select, smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select},
 210         { "ATC IRMode", smsc_ircc_set_transceiver_smsc_ircc_atc, smsc_ircc_probe_transceiver_smsc_ircc_atc},
 211         { NULL, NULL}
 212 };
 213 #define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (DIM(smsc_transceivers)-1)
 214
 215 /*  SMC SuperIO chipsets definitions */
 216
 217 #define KEY55_1 0       /* SuperIO Configuration mode with Key <0x55> */
 218 #define KEY55_2 1       /* SuperIO Configuration mode with Key <0x55,0x55> */
 219 #define NoIRDA  2       /* SuperIO Chip has no IRDA Port */
 220 #define SIR     0       /* SuperIO Chip has only slow IRDA */
 221 #define FIR     4       /* SuperIO Chip has fast IRDA */
 222 #define SERx4   8       /* SuperIO Chip supports 115,2 KBaud * 4=460,8 KBaud */
 223
 224 static smsc_chip_t __initdata fdc_chips_flat[]=
 225 {
 226         /* Base address 0x3f0 or 0x370 */
 227         { "37C44",      KEY55_1|NoIRDA,         0x00, 0x00 }, /* This chip cannot be detected */
 228         { "37C665GT",   KEY55_2|NoIRDA,         0x65, 0x01 },
 229         { "37C665GT",   KEY55_2|NoIRDA,         0x66, 0x01 },
 230         { "37C669",     KEY55_2|SIR|SERx4,      0x03, 0x02 },
 231         { "37C669",     KEY55_2|SIR|SERx4,      0x04, 0x02 }, /* ID? */
 232         { "37C78",      KEY55_2|NoIRDA,         0x78, 0x00 },
 233         { "37N769",     KEY55_1|FIR|SERx4,      0x28, 0x00 },
 234         { "37N869",     KEY55_1|FIR|SERx4,      0x29, 0x00 },
 235         { NULL }
 236 };
 237
 238 static smsc_chip_t __initdata fdc_chips_paged[]=
 239 {
 240         /* Base address 0x3f0 or 0x370 */
 241         { "37B72X",     KEY55_1|SIR|SERx4,      0x4c, 0x00 },
 242         { "37B77X",     KEY55_1|SIR|SERx4,      0x43, 0x00 },
 243         { "37B78X",     KEY55_1|SIR|SERx4,      0x44, 0x00 },
 244         { "37B80X",     KEY55_1|SIR|SERx4,      0x42, 0x00 },
 245         { "37C67X",     KEY55_1|FIR|SERx4,      0x40, 0x00 },
 246         { "37C93X",     KEY55_2|SIR|SERx4,      0x02, 0x01 },
 247         { "37C93XAPM",  KEY55_1|SIR|SERx4,      0x30, 0x01 },
 248         { "37C93XFR",   KEY55_2|FIR|SERx4,      0x03, 0x01 },
 249         { "37M707",     KEY55_1|SIR|SERx4,      0x42, 0x00 },
 250         { "37M81X",     KEY55_1|SIR|SERx4,      0x4d, 0x00 },
 251         { "37N958FR",   KEY55_1|FIR|SERx4,      0x09, 0x04 },
 252         { "37N971",     KEY55_1|FIR|SERx4,      0x0a, 0x00 },
 253         { "37N972",     KEY55_1|FIR|SERx4,      0x0b, 0x00 },
 254         { NULL }
 255 };
 256
 257 static smsc_chip_t __initdata lpc_chips_flat[]=
 258 {
 259         /* Base address 0x2E or 0x4E */
 260         { "47N227",     KEY55_1|FIR|SERx4,      0x5a, 0x00 },
 261         { "47N267",     KEY55_1|FIR|SERx4,      0x5e, 0x00 },
 262         { NULL }
 263 };
 264
 265 static smsc_chip_t __initdata lpc_chips_paged[]=
 266 {
 267         /* Base address 0x2E or 0x4E */
 268         { "47B27X",     KEY55_1|SIR|SERx4,      0x51, 0x00 },
 269         { "47B37X",     KEY55_1|SIR|SERx4,      0x52, 0x00 },
 270         { "47M10X",     KEY55_1|SIR|SERx4,      0x59, 0x00 },
 271         { "47M120",     KEY55_1|NoIRDA|SERx4,   0x5c, 0x00 },
 272         { "47M13X",     KEY55_1|SIR|SERx4,      0x59, 0x00 },
 273         { "47M14X",     KEY55_1|SIR|SERx4,      0x5f, 0x00 },
 274         { "47N252",     KEY55_1|FIR|SERx4,      0x0e, 0x00 },
 275         { "47S42X",     KEY55_1|SIR|SERx4,      0x57, 0x00 },
 276         { NULL }
 277 };
 278
 279 #define SMSCSIO_TYPE_FDC        1
 280 #define SMSCSIO_TYPE_LPC        2
 281 #define SMSCSIO_TYPE_FLAT       4
 282 #define SMSCSIO_TYPE_PAGED      8
 283
 284 static smsc_chip_address_t __initdata possible_addresses[]=
 285 {
 286         {0x3f0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED},
 287         {0x370, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED},
 288         {0xe0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED},
 289         {0x2e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED},
 290         {0x4e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED},
 291         {0,0}
 292 };
 293
 294 /* Globals */
 295
 296 static struct smsc_ircc_cb *dev_self[] = { NULL, NULL};
 297
 298 static int ircc_irq=255;
 299 static int ircc_dma=255;
 300 static int ircc_fir=0;
 301 static int ircc_sir=0;
 302 static int ircc_cfg=0;
 303 static int ircc_transceiver=0;
 304
 305 static unsigned short   dev_count=0;
 306
 307 static inline void register_bank(int iobase, int bank)
 308 {
 309         outb(((inb(iobase+IRCC_MASTER) & 0xf0) | (bank & 0x07)),
 310                iobase+IRCC_MASTER);
 311 }
 312
 313
 314 /*******************************************************************************
 315  *
 316  *
 317  * SMSC-ircc stuff
 318  *
 319  *
 320  *******************************************************************************/
 321
 322 /*
 323  * Function smsc_ircc_init ()
 324  *
 325  *    Initialize chip. Just try to find out how many chips we are dealing with
 326  *    and where they are
 327  */
 328 static int __init smsc_ircc_init(void)
 329 {
 330         int ret=-ENODEV;
 331
 332         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
 333
 334         dev_count=0;
 335
 336         if ((ircc_fir>0)&&(ircc_sir>0)) {
 337                 IRDA_MESSAGE(" Overriding FIR address 0x%04x\n", ircc_fir);
 338                 IRDA_MESSAGE(" Overriding SIR address 0x%04x\n", ircc_sir);
 339
 340                 if (smsc_ircc_open(ircc_fir, ircc_sir, ircc_dma, ircc_irq) == 0)
 341                         return 0;
 342
 343                 return -ENODEV;
 344         }
 345
 346         /* try user provided configuration register base address */
 347         if (ircc_cfg>0) {
 348                 IRDA_MESSAGE(" Overriding configuration address 0x%04x\n",
 349                              ircc_cfg);
 350                 if (!smsc_superio_fdc(ircc_cfg))
 351                         ret = 0;
 352                 if (!smsc_superio_lpc(ircc_cfg))
 353                         ret = 0;
 354         }
 355
 356         if(smsc_ircc_look_for_chips()>0) ret = 0;
 357
 358         return ret;
 359 }
 360
 361 /*
 362  * Function smsc_ircc_open (firbase, sirbase, dma, irq)
 363  *
 364  *    Try to open driver instance
 365  *
 366  */
 367 static int __init smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq)
 368 {
 369         struct smsc_ircc_cb *self;
 370         struct net_device *dev;
 371         int err;
 372
 373         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
 374
 375         err = smsc_ircc_present(fir_base, sir_base);
 376         if(err)
 377                 goto err_out;
 378
 379         err = -ENOMEM;
 380         if (dev_count > DIM(dev_self)) {
 381                 IRDA_WARNING("%s(), too many devices!\n", __FUNCTION__);
 382                 goto err_out1;
 383         }
 384
 385         /*
 386          *  Allocate new instance of the driver
 387          */
 388         dev = alloc_irdadev(sizeof(struct smsc_ircc_cb));
 389         if (!dev) {
 390                 IRDA_WARNING("%s() can't allocate net device\n", __FUNCTION__);
 391                 goto err_out1;
 392         }
 393
 394         SET_MODULE_OWNER(dev);
 395
 396         dev->hard_start_xmit = smsc_ircc_hard_xmit_sir;
 397 #if SMSC_IRCC2_C_NET_TIMEOUT
 398         dev->tx_timeout      = smsc_ircc_timeout;
 399         dev->watchdog_timeo  = HZ*2;  /* Allow enough time for speed change */
 400 #endif
 401         dev->open            = smsc_ircc_net_open;
 402         dev->stop            = smsc_ircc_net_close;
 403         dev->do_ioctl        = smsc_ircc_net_ioctl;
 404         dev->get_stats       = smsc_ircc_net_get_stats;
 405
 406         self = dev->priv;
 407         self->netdev = dev;
 408
 409         /* Make ifconfig display some details */
 410         dev->base_addr = self->io.fir_base = fir_base;
 411         dev->irq = self->io.irq = irq;
 412
 413         /* Need to store self somewhere */
 414         dev_self[dev_count++] = self;
 415         spin_lock_init(&self->lock);
 416
 417         self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
 418         self->tx_buff.truesize = SMSC_IRCC2_TX_BUFF_TRUESIZE;
 419
 420         self->rx_buff.head =
 421                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
 422                                    &self->rx_buff_dma, GFP_KERNEL);
 423         if (self->rx_buff.head == NULL) {
 424                 IRDA_ERROR("%s, Can't allocate memory for receive buffer!\n",
 425                            driver_name);
 426                 goto err_out2;
 427         }
 428
 429         self->tx_buff.head =
 430                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
 431                                    &self->tx_buff_dma, GFP_KERNEL);
 432         if (self->tx_buff.head == NULL) {
 433                 IRDA_ERROR("%s, Can't allocate memory for transmit buffer!\n",
 434                            driver_name);
 435                 goto err_out3;
 436         }
 437
 438         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
 439         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
 440
 441         self->rx_buff.in_frame = FALSE;
 442         self->rx_buff.state = OUTSIDE_FRAME;
 443         self->tx_buff.data = self->tx_buff.head;
 444         self->rx_buff.data = self->rx_buff.head;
 445
 446         smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
 447
 448         smsc_ircc_setup_qos(self);
 449
 450         smsc_ircc_init_chip(self);
 451
 452         if(ircc_transceiver > 0  &&
 453            ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
 454                 self->transceiver = ircc_transceiver;
 455         else
 456                 smsc_ircc_probe_transceiver(self);
 457
 458         err = register_netdev(self->netdev);
 459         if(err) {
 460                 IRDA_ERROR("%s, Network device registration failed!\n",
 461                            driver_name);
 462                 goto err_out4;
 463         }
 464
 465         self->pmdev = pm_register(PM_SYS_DEV, PM_SYS_IRDA, smsc_ircc_pmproc);
 466         if (self->pmdev)
 467                 self->pmdev->data = self;
 468
 469         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
 470
 471         return 0;
 472  err_out4:
 473         dma_free_coherent(NULL, self->tx_buff.truesize,
 474                           self->tx_buff.head, self->tx_buff_dma);
 475  err_out3:
 476         dma_free_coherent(NULL, self->rx_buff.truesize,
 477                           self->rx_buff.head, self->rx_buff_dma);
 478  err_out2:
 479         free_netdev(self->netdev);
 480         dev_self[--dev_count] = NULL;
 481  err_out1:
 482         release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
 483         release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
 484  err_out:
 485         return err;
 486 }
 487
 488 /*
 489  * Function smsc_ircc_present(fir_base, sir_base)
 490  *
 491  *    Check the smsc-ircc chip presence
 492  *
 493  */
 494 static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base)
 495 {
 496         unsigned char low, high, chip, config, dma, irq, version;
 497
 498         if (!request_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT,
 499                             driver_name)) {
 500                 IRDA_WARNING("%s: can't get fir_base of 0x%03x\n",
 501                              __FUNCTION__, fir_base);
 502                 goto out1;
 503         }
 504
 505         if (!request_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT,
 506                             driver_name)) {
 507                 IRDA_WARNING("%s: can't get sir_base of 0x%03x\n",
 508                              __FUNCTION__, sir_base);
 509                 goto out2;
 510         }
 511
 512         register_bank(fir_base, 3);
 513
 514         high    = inb(fir_base+IRCC_ID_HIGH);
 515         low     = inb(fir_base+IRCC_ID_LOW);
 516         chip    = inb(fir_base+IRCC_CHIP_ID);
 517         version = inb(fir_base+IRCC_VERSION);
 518         config  = inb(fir_base+IRCC_INTERFACE);
 519         dma     = config & IRCC_INTERFACE_DMA_MASK;
 520         irq     = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
 521
 522         if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
 523                 IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
 524                              __FUNCTION__, fir_base);
 525                 goto out3;
 526         }
 527         IRDA_MESSAGE("SMsC IrDA Controller found\n IrCC version %d.%d, "
 528                      "firport 0x%03x, sirport 0x%03x dma=%d, irq=%d\n",
 529                      chip & 0x0f, version, fir_base, sir_base, dma, irq);
 530
 531         return 0;
 532  out3:
 533         release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
 534  out2:
 535         release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
 536  out1:
 537         return -ENODEV;
 538 }
 539
 540 /*
 541  * Function smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq)
 542  *
 543  *    Setup I/O
 544  *
 545  */
 546 static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
 547                                unsigned int fir_base, unsigned int sir_base,
 548                                u8 dma, u8 irq)
 549 {
 550         unsigned char config, chip_dma, chip_irq;
 551
 552         register_bank(fir_base, 3);
 553         config  = inb(fir_base+IRCC_INTERFACE);
 554         chip_dma     = config & IRCC_INTERFACE_DMA_MASK;
 555         chip_irq     = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
 556
 557         self->io.fir_base  = fir_base;
 558         self->io.sir_base  = sir_base;
 559         self->io.fir_ext   = SMSC_IRCC2_FIR_CHIP_IO_EXTENT;
 560         self->io.sir_ext   = SMSC_IRCC2_SIR_CHIP_IO_EXTENT;
 561         self->io.fifo_size = SMSC_IRCC2_FIFO_SIZE;
 562         self->io.speed = SMSC_IRCC2_C_IRDA_FALLBACK_SPEED;
 563
 564         if (irq < 255) {
 565                 if (irq != chip_irq)
 566                         IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
 567                                      driver_name, chip_irq, irq);
 568                 self->io.irq = irq;
 569         }
 570         else
 571                 self->io.irq = chip_irq;
 572
 573         if (dma < 255) {
 574                 if (dma != chip_dma)
 575                         IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
 576                                      driver_name, chip_dma, dma);
 577                 self->io.dma = dma;
 578         }
 579         else
 580                 self->io.dma = chip_dma;
 581
 582 }
 583
 584 /*
 585  * Function smsc_ircc_setup_qos(self)
 586  *
 587  *    Setup qos
 588  *
 589  */
 590 static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self)
 591 {
 592         /* Initialize QoS for this device */
 593         irda_init_max_qos_capabilies(&self->qos);
 594
 595         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
 596                 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
 597
 598         self->qos.min_turn_time.bits = SMSC_IRCC2_MIN_TURN_TIME;
 599         self->qos.window_size.bits = SMSC_IRCC2_WINDOW_SIZE;
 600         irda_qos_bits_to_value(&self->qos);
 601 }
 602
 603 /*
 604  * Function smsc_ircc_init_chip(self)
 605  *
 606  *    Init chip
 607  *
 608  */
 609 static void smsc_ircc_init_chip(struct smsc_ircc_cb *self)
 610 {
 611         int iobase, ir_mode, ctrl, fast;
 612
 613         IRDA_ASSERT( self != NULL, return; );
 614         iobase = self->io.fir_base;
 615
 616         ir_mode = IRCC_CFGA_IRDA_SIR_A;
 617         ctrl = 0;
 618         fast = 0;
 619
 620         register_bank(iobase, 0);
 621         outb(IRCC_MASTER_RESET, iobase+IRCC_MASTER);
 622         outb(0x00, iobase+IRCC_MASTER);
 623
 624         register_bank(iobase, 1);
 625         outb(((inb(iobase+IRCC_SCE_CFGA) & 0x87) | ir_mode),
 626              iobase+IRCC_SCE_CFGA);
 627
 628 #ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
 629         outb(((inb(iobase+IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
 630              iobase+IRCC_SCE_CFGB);
 631 #else
 632         outb(((inb(iobase+IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
 633              iobase+IRCC_SCE_CFGB);
 634 #endif
 635         (void) inb(iobase+IRCC_FIFO_THRESHOLD);
 636         outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase+IRCC_FIFO_THRESHOLD);
 637
 638         register_bank(iobase, 4);
 639         outb((inb(iobase+IRCC_CONTROL) & 0x30) | ctrl, iobase+IRCC_CONTROL);
 640
 641         register_bank(iobase, 0);
 642         outb(fast, iobase+IRCC_LCR_A);
 643
 644         smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
 645
 646         /* Power on device */
 647         outb(0x00, iobase+IRCC_MASTER);
 648 }
 649
 650 /*
 651  * Function smsc_ircc_net_ioctl (dev, rq, cmd)
 652  *
 653  *    Process IOCTL commands for this device
 654  *
 655  */
 656 static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 657 {
 658         struct if_irda_req *irq = (struct if_irda_req *) rq;
 659         struct smsc_ircc_cb *self;
 660         unsigned long flags;
 661         int ret = 0;
 662
 663         IRDA_ASSERT(dev != NULL, return -1;);
 664
 665         self = dev->priv;
 666
 667         IRDA_ASSERT(self != NULL, return -1;);
 668
 669         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd);
 670
 671         switch (cmd) {
 672         case SIOCSBANDWIDTH: /* Set bandwidth */
 673                 if (!capable(CAP_NET_ADMIN))
 674                         ret = -EPERM;
 675                 else {
 676                         /* Make sure we are the only one touching
 677                          * self->io.speed and the hardware - Jean II */
 678                         spin_lock_irqsave(&self->lock, flags);
 679                         smsc_ircc_change_speed(self, irq->ifr_baudrate);
 680                         spin_unlock_irqrestore(&self->lock, flags);
 681                 }
 682                 break;
 683         case SIOCSMEDIABUSY: /* Set media busy */
 684                 if (!capable(CAP_NET_ADMIN)) {
 685                         ret = -EPERM;
 686                         break;
 687                 }
 688
 689                 irda_device_set_media_busy(self->netdev, TRUE);
 690                 break;
 691         case SIOCGRECEIVING: /* Check if we are receiving right now */
 692                 irq->ifr_receiving = smsc_ircc_is_receiving(self);
 693                 break;
 694         #if 0
 695         case SIOCSDTRRTS:
 696                 if (!capable(CAP_NET_ADMIN)) {
 697                         ret = -EPERM;
 698                         break;
 699                 }
 700                 smsc_ircc_sir_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
 701                 break;
 702         #endif
 703         default:
 704                 ret = -EOPNOTSUPP;
 705         }
 706
 707         return ret;
 708 }
 709
 710 static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev)
 711 {
 712         struct smsc_ircc_cb *self = (struct smsc_ircc_cb *) dev->priv;
 713
 714         return &self->stats;
 715 }
 716
 717 #if SMSC_IRCC2_C_NET_TIMEOUT
 718 /*
 719  * Function smsc_ircc_timeout (struct net_device *dev)
 720  *
 721  *    The networking timeout management.
 722  *
 723  */
 724
 725 static void smsc_ircc_timeout(struct net_device *dev)
 726 {
 727         struct smsc_ircc_cb *self;
 728         unsigned long flags;
 729
 730         self = (struct smsc_ircc_cb *) dev->priv;
 731
 732         IRDA_WARNING("%s: transmit timed out, changing speed to: %d\n",
 733                      dev->name, self->io.speed);
 734         spin_lock_irqsave(&self->lock, flags);
 735         smsc_ircc_sir_start(self);
 736         smsc_ircc_change_speed(self, self->io.speed);
 737         dev->trans_start = jiffies;
 738         netif_wake_queue(dev);
 739         spin_unlock_irqrestore(&self->lock, flags);
 740 }
 741 #endif
 742
 743 /*
 744  * Function smsc_ircc_hard_xmit_sir (struct sk_buff *skb, struct net_device *dev)
 745  *
 746  *    Transmits the current frame until FIFO is full, then
 747  *    waits until the next transmit interrupt, and continues until the
 748  *    frame is transmitted.
 749  */
 750 int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
 751 {
 752         struct smsc_ircc_cb *self;
 753         unsigned long flags;
 754         int iobase;
 755         s32 speed;
 756
 757         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
 758
 759         IRDA_ASSERT(dev != NULL, return 0;);
 760
 761         self = (struct smsc_ircc_cb *) dev->priv;
 762         IRDA_ASSERT(self != NULL, return 0;);
 763
 764         iobase = self->io.sir_base;
 765
 766         netif_stop_queue(dev);
 767
 768         /* Make sure test of self->io.speed & speed change are atomic */
 769         spin_lock_irqsave(&self->lock, flags);
 770
 771         /* Check if we need to change the speed */
 772         speed = irda_get_next_speed(skb);
 773         if ((speed != self->io.speed) && (speed != -1)) {
 774                 /* Check for empty frame */
 775                 if (!skb->len) {
 776                         /*
 777                          * We send frames one by one in SIR mode (no
 778                          * pipelining), so at this point, if we were sending
 779                          * a previous frame, we just received the interrupt
 780                          * telling us it is finished (UART_IIR_THRI).
 781                          * Therefore, waiting for the transmitter to really
 782                          * finish draining the fifo won't take too long.
 783                          * And the interrupt handler is not expected to run.
 784                          * - Jean II */
 785                         smsc_ircc_sir_wait_hw_transmitter_finish(self);
 786                         smsc_ircc_change_speed(self, speed);
 787                         spin_unlock_irqrestore(&self->lock, flags);
 788                         dev_kfree_skb(skb);
 789                         return 0;
 790                 } else {
 791                         self->new_speed = speed;
 792                 }
 793         }
 794
 795         /* Init tx buffer */
 796         self->tx_buff.data = self->tx_buff.head;
 797
 798         /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
 799         self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
 800                                            self->tx_buff.truesize);
 801
 802         self->stats.tx_bytes += self->tx_buff.len;
 803
 804         /* Turn on transmit finished interrupt. Will fire immediately!  */
 805         outb(UART_IER_THRI, iobase+UART_IER);
 806
 807         spin_unlock_irqrestore(&self->lock, flags);
 808
 809         dev_kfree_skb(skb);
 810
 811         return 0;
 812 }
 813
 814 /*
 815  * Function smsc_ircc_set_fir_speed (self, baud)
 816  *
 817  *    Change the speed of the device
 818  *
 819  */
 820 static void smsc_ircc_set_fir_speed(struct smsc_ircc_cb *self, u32 speed)
 821 {
 822         int fir_base, ir_mode, ctrl, fast;
 823
 824         IRDA_ASSERT(self != NULL, return;);
 825         fir_base = self->io.fir_base;
 826
 827         self->io.speed = speed;
 828
 829         switch(speed) {
 830         default:
 831         case 576000:
 832                 ir_mode = IRCC_CFGA_IRDA_HDLC;
 833                 ctrl = IRCC_CRC;
 834                 fast = 0;
 835                 IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__);
 836                 break;
 837         case 1152000:
 838                 ir_mode = IRCC_CFGA_IRDA_HDLC;
 839                 ctrl = IRCC_1152 | IRCC_CRC;
 840                 fast = IRCC_LCR_A_FAST | IRCC_LCR_A_GP_DATA;
 841                 IRDA_DEBUG(0, "%s(), handling baud of 1152000\n",
 842                            __FUNCTION__);
 843                 break;
 844         case 4000000:
 845                 ir_mode = IRCC_CFGA_IRDA_4PPM;
 846                 ctrl = IRCC_CRC;
 847                 fast = IRCC_LCR_A_FAST;
 848                 IRDA_DEBUG(0, "%s(), handling baud of 4000000\n",
 849                            __FUNCTION__);
 850                 break;
 851         }
 852         #if 0
 853         Now in tranceiver!
 854         /* This causes an interrupt */
 855         register_bank(fir_base, 0);
 856         outb((inb(fir_base+IRCC_LCR_A) &  0xbf) | fast, fir_base+IRCC_LCR_A);
 857         #endif
 858
 859         register_bank(fir_base, 1);
 860         outb(((inb(fir_base+IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base+IRCC_SCE_CFGA);
 861
 862         register_bank(fir_base, 4);
 863         outb((inb(fir_base+IRCC_CONTROL) & 0x30) | ctrl, fir_base+IRCC_CONTROL);
 864 }
 865
 866 /*
 867  * Function smsc_ircc_fir_start(self)
 868  *
 869  *    Change the speed of the device
 870  *
 871  */
 872 static void smsc_ircc_fir_start(struct smsc_ircc_cb *self)
 873 {
 874         struct net_device *dev;
 875         int fir_base;
 876
 877         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
 878
 879         IRDA_ASSERT(self != NULL, return;);
 880         dev = self->netdev;
 881         IRDA_ASSERT(dev != NULL, return;);
 882
 883         fir_base = self->io.fir_base;
 884
 885         /* Reset everything */
 886
 887         /* Install FIR transmit handler */
 888         dev->hard_start_xmit = smsc_ircc_hard_xmit_fir;
 889
 890         /* Clear FIFO */
 891         outb(inb(fir_base+IRCC_LCR_A)|IRCC_LCR_A_FIFO_RESET, fir_base+IRCC_LCR_A);
 892
 893         /* Enable interrupt */
 894         /*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base+IRCC_IER);*/
 895
 896         register_bank(fir_base, 1);
 897
 898         /* Select the TX/RX interface */
 899 #ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
 900         outb(((inb(fir_base+IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
 901              fir_base+IRCC_SCE_CFGB);
 902 #else
 903         outb(((inb(fir_base+IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
 904              fir_base+IRCC_SCE_CFGB);
 905 #endif
 906         (void) inb(fir_base+IRCC_FIFO_THRESHOLD);
 907
 908         /* Enable SCE interrupts */
 909         outb(0, fir_base+IRCC_MASTER);
 910         register_bank(fir_base, 0);
 911         outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base+IRCC_IER);
 912         outb(IRCC_MASTER_INT_EN, fir_base+IRCC_MASTER);
 913 }
 914
 915 /*
 916  * Function smsc_ircc_fir_stop(self, baud)
 917  *
 918  *    Change the speed of the device
 919  *
 920  */
 921 static void smsc_ircc_fir_stop(struct smsc_ircc_cb *self)
 922 {
 923         int fir_base;
 924
 925         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
 926
 927         IRDA_ASSERT(self != NULL, return;);
 928
 929         fir_base = self->io.fir_base;
 930         register_bank(fir_base, 0);
 931         /*outb(IRCC_MASTER_RESET, fir_base+IRCC_MASTER);*/
 932         outb(inb(fir_base+IRCC_LCR_B) & IRCC_LCR_B_SIP_ENABLE, fir_base+IRCC_LCR_B);
 933 }
 934
 935
 936 /*
 937  * Function smsc_ircc_change_speed(self, baud)
 938  *
 939  *    Change the speed of the device
 940  *
 941  * This function *must* be called with spinlock held, because it may
 942  * be called from the irq handler. - Jean II
 943  */
 944 static void smsc_ircc_change_speed(void *priv, u32 speed)
 945 {
 946         struct smsc_ircc_cb *self = (struct smsc_ircc_cb *) priv;
 947         struct net_device *dev;
 948         int iobase;
 949         int last_speed_was_sir;
 950
 951         IRDA_DEBUG(0, "%s() changing speed to: %d\n", __FUNCTION__, speed);
 952
 953         IRDA_ASSERT(self != NULL, return;);
 954         dev = self->netdev;
 955         iobase = self->io.fir_base;
 956
 957         last_speed_was_sir = self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED;
 958
 959         #if 0
 960         /* Temp Hack */
 961         speed= 1152000;
 962         self->io.speed = speed;
 963         last_speed_was_sir = 0;
 964         smsc_ircc_fir_start(self);
 965         #endif
 966
 967         if(self->io.speed == 0)
 968                 smsc_ircc_sir_start(self);
 969
 970         #if 0
 971         if(!last_speed_was_sir) speed = self->io.speed;
 972         #endif
 973
 974         if(self->io.speed != speed) smsc_ircc_set_transceiver_for_speed(self, speed);
 975
 976         self->io.speed = speed;
 977
 978         if(speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
 979                 if(!last_speed_was_sir) {
 980                         smsc_ircc_fir_stop(self);
 981                         smsc_ircc_sir_start(self);
 982                 }
 983                 smsc_ircc_set_sir_speed(self, speed);
 984         }
 985         else {
 986                 if(last_speed_was_sir) {
 987                         #if SMSC_IRCC2_C_SIR_STOP
 988                         smsc_ircc_sir_stop(self);
 989                         #endif
 990                         smsc_ircc_fir_start(self);
 991                 }
 992                 smsc_ircc_set_fir_speed(self, speed);
 993
 994                 #if 0
 995                 self->tx_buff.len = 10;
 996                 self->tx_buff.data = self->tx_buff.head;
 997
 998                 smsc_ircc_dma_xmit(self, iobase, 4000);
 999                 #endif
1000                 /* Be ready for incoming frames */
1001                 smsc_ircc_dma_receive(self, iobase);
1002         }
1003
1004         netif_wake_queue(dev);
1005 }
1006
1007 /*
1008  * Function smsc_ircc_set_sir_speed (self, speed)
1009  *
1010  *    Set speed of IrDA port to specified baudrate
1011  *
1012  */
1013 void smsc_ircc_set_sir_speed(void *priv, __u32 speed)
1014 {
1015         struct smsc_ircc_cb *self = (struct smsc_ircc_cb *) priv;
1016         int iobase;
1017         int fcr;    /* FIFO control reg */
1018         int lcr;    /* Line control reg */
1019         int divisor;
1020
1021         IRDA_DEBUG(0, "%s(), Setting speed to: %d\n", __FUNCTION__, speed);
1022
1023         IRDA_ASSERT(self != NULL, return;);
1024         iobase = self->io.sir_base;
1025
1026         /* Update accounting for new speed */
1027         self->io.speed = speed;
1028
1029         /* Turn off interrupts */
1030         outb(0, iobase+UART_IER);
1031
1032         divisor = SMSC_IRCC2_MAX_SIR_SPEED/speed;
1033
1034         fcr = UART_FCR_ENABLE_FIFO;
1035
1036         /*
1037          * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1038          * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1039          * about this timeout since it will always be fast enough.
1040          */
1041         if (self->io.speed < 38400)
1042                 fcr |= UART_FCR_TRIGGER_1;
1043         else
1044                 fcr |= UART_FCR_TRIGGER_14;
1045
1046         /* IrDA ports use 8N1 */
1047         lcr = UART_LCR_WLEN8;
1048
1049         outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1050         outb(divisor & 0xff,      iobase+UART_DLL); /* Set speed */
1051         outb(divisor >> 8,        iobase+UART_DLM);
1052         outb(lcr,                 iobase+UART_LCR); /* Set 8N1  */
1053         outb(fcr,                 iobase+UART_FCR); /* Enable FIFO's */
1054
1055         /* Turn on interrups */
1056         outb(UART_IER_RLSI|UART_IER_RDI|UART_IER_THRI, iobase+UART_IER);
1057
1058         IRDA_DEBUG(2, "%s() speed changed to: %d\n", __FUNCTION__, speed);
1059 }
1060
1061
1062 /*
1063  * Function smsc_ircc_hard_xmit_fir (skb, dev)
1064  *
1065  *    Transmit the frame!
1066  *
1067  */
1068 static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
1069 {
1070         struct smsc_ircc_cb *self;
1071         unsigned long flags;
1072         s32 speed;
1073         int iobase;
1074         int mtt;
1075
1076         IRDA_ASSERT(dev != NULL, return 0;);
1077         self = (struct smsc_ircc_cb *) dev->priv;
1078         IRDA_ASSERT(self != NULL, return 0;);
1079
1080         iobase = self->io.fir_base;
1081
1082         netif_stop_queue(dev);
1083
1084         /* Make sure test of self->io.speed & speed change are atomic */
1085         spin_lock_irqsave(&self->lock, flags);
1086
1087         /* Check if we need to change the speed after this frame */
1088         speed = irda_get_next_speed(skb);
1089         if ((speed != self->io.speed) && (speed != -1)) {
1090                 /* Check for empty frame */
1091                 if (!skb->len) {
1092                         /* Note : you should make sure that speed changes
1093                          * are not going to corrupt any outgoing frame.
1094                          * Look at nsc-ircc for the gory details - Jean II */
1095                         smsc_ircc_change_speed(self, speed);
1096                         spin_unlock_irqrestore(&self->lock, flags);
1097                         dev_kfree_skb(skb);
1098                         return 0;
1099                 } else
1100                         self->new_speed = speed;
1101         }
1102
1103         memcpy(self->tx_buff.head, skb->data, skb->len);
1104
1105         self->tx_buff.len = skb->len;
1106         self->tx_buff.data = self->tx_buff.head;
1107
1108         mtt = irda_get_mtt(skb);
1109         if (mtt) {
1110                 int bofs;
1111
1112                 /*
1113                  * Compute how many BOFs (STA or PA's) we need to waste the
1114                  * min turn time given the speed of the link.
1115                  */
1116                 bofs = mtt * (self->io.speed / 1000) / 8000;
1117                 if (bofs > 4095)
1118                         bofs = 4095;
1119
1120                 smsc_ircc_dma_xmit(self, iobase, bofs);
1121         } else {
1122                 /* Transmit frame */
1123                 smsc_ircc_dma_xmit(self, iobase, 0);
1124         }
1125         spin_unlock_irqrestore(&self->lock, flags);
1126         dev_kfree_skb(skb);
1127
1128         return 0;
1129 }
1130
1131 /*
1132  * Function smsc_ircc_dma_xmit (self, iobase)
1133  *
1134  *    Transmit data using DMA
1135  *
1136  */
1137 static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int iobase, int bofs)
1138 {
1139         u8 ctrl;
1140
1141         IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1142 #if 1
1143         /* Disable Rx */
1144         register_bank(iobase, 0);
1145         outb(0x00, iobase+IRCC_LCR_B);
1146 #endif
1147         register_bank(iobase, 1);
1148         outb(inb(iobase+IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1149              iobase+IRCC_SCE_CFGB);
1150
1151         self->io.direction = IO_XMIT;
1152
1153         /* Set BOF additional count for generating the min turn time */
1154         register_bank(iobase, 4);
1155         outb(bofs & 0xff, iobase+IRCC_BOF_COUNT_LO);
1156         ctrl = inb(iobase+IRCC_CONTROL) & 0xf0;
1157         outb(ctrl | ((bofs >> 8) & 0x0f), iobase+IRCC_BOF_COUNT_HI);
1158
1159         /* Set max Tx frame size */
1160         outb(self->tx_buff.len >> 8, iobase+IRCC_TX_SIZE_HI);
1161         outb(self->tx_buff.len & 0xff, iobase+IRCC_TX_SIZE_LO);
1162
1163         /*outb(UART_MCR_OUT2, self->io.sir_base + UART_MCR);*/
1164
1165         /* Enable burst mode chip Tx DMA */
1166         register_bank(iobase, 1);
1167         outb(inb(iobase+IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1168              IRCC_CFGB_DMA_BURST, iobase+IRCC_SCE_CFGB);
1169
1170         /* Setup DMA controller (must be done after enabling chip DMA) */
1171         irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
1172                        DMA_TX_MODE);
1173
1174         /* Enable interrupt */
1175
1176         register_bank(iobase, 0);
1177         outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase+IRCC_IER);
1178         outb(IRCC_MASTER_INT_EN, iobase+IRCC_MASTER);
1179
1180         /* Enable transmit */
1181         outb(IRCC_LCR_B_SCE_TRANSMIT | IRCC_LCR_B_SIP_ENABLE, iobase+IRCC_LCR_B);
1182 }
1183
1184 /*
1185  * Function smsc_ircc_dma_xmit_complete (self)
1186  *
1187  *    The transfer of a frame in finished. This function will only be called
1188  *    by the interrupt handler
1189  *
1190  */
1191 static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self, int iobase)
1192 {
1193         IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1194 #if 0
1195         /* Disable Tx */
1196         register_bank(iobase, 0);
1197         outb(0x00, iobase+IRCC_LCR_B);
1198 #endif
1199         register_bank(self->io.fir_base, 1);
1200         outb(inb(self->io.fir_base+IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1201              self->io.fir_base+IRCC_SCE_CFGB);
1202
1203         /* Check for underrun! */
1204         register_bank(iobase, 0);
1205         if (inb(iobase+IRCC_LSR) & IRCC_LSR_UNDERRUN) {
1206                 self->stats.tx_errors++;
1207                 self->stats.tx_fifo_errors++;
1208
1209                 /* Reset error condition */
1210                 register_bank(iobase, 0);
1211                 outb(IRCC_MASTER_ERROR_RESET, iobase+IRCC_MASTER);
1212                 outb(0x00, iobase+IRCC_MASTER);
1213         } else {
1214                 self->stats.tx_packets++;
1215                 self->stats.tx_bytes +=  self->tx_buff.len;
1216         }
1217
1218         /* Check if it's time to change the speed */
1219         if (self->new_speed) {
1220                 smsc_ircc_change_speed(self, self->new_speed);
1221                 self->new_speed = 0;
1222         }
1223
1224         netif_wake_queue(self->netdev);
1225 }
1226
1227 /*
1228  * Function smsc_ircc_dma_receive(self)
1229  *
1230  *    Get ready for receiving a frame. The device will initiate a DMA
1231  *    if it starts to receive a frame.
1232  *
1233  */
1234 static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self, int iobase)
1235 {
1236 #if 0
1237         /* Turn off chip DMA */
1238         register_bank(iobase, 1);
1239         outb(inb(iobase+IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1240              iobase+IRCC_SCE_CFGB);
1241 #endif
1242
1243         /* Disable Tx */
1244         register_bank(iobase, 0);
1245         outb(0x00, iobase+IRCC_LCR_B);
1246
1247         /* Turn off chip DMA */
1248         register_bank(iobase, 1);
1249         outb(inb(iobase+IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
1250              iobase+IRCC_SCE_CFGB);
1251
1252         self->io.direction = IO_RECV;
1253         self->rx_buff.data = self->rx_buff.head;
1254
1255         /* Set max Rx frame size */
1256         register_bank(iobase, 4);
1257         outb((2050 >> 8) & 0x0f, iobase+IRCC_RX_SIZE_HI);
1258         outb(2050 & 0xff, iobase+IRCC_RX_SIZE_LO);
1259
1260         /* Setup DMA controller */
1261         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1262                        DMA_RX_MODE);
1263
1264         /* Enable burst mode chip Rx DMA */
1265         register_bank(iobase, 1);
1266         outb(inb(iobase+IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
1267              IRCC_CFGB_DMA_BURST, iobase+IRCC_SCE_CFGB);
1268
1269         /* Enable interrupt */
1270         register_bank(iobase, 0);
1271         outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase+IRCC_IER);
1272         outb(IRCC_MASTER_INT_EN, iobase+IRCC_MASTER);
1273
1274
1275         /* Enable receiver */
1276         register_bank(iobase, 0);
1277         outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
1278              iobase+IRCC_LCR_B);
1279
1280         return 0;
1281 }
1282
1283 /*
1284  * Function smsc_ircc_dma_receive_complete(self, iobase)
1285  *
1286  *    Finished with receiving frames
1287  *
1288  */
1289 static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self, int iobase)
1290 {
1291         struct sk_buff *skb;
1292         int len, msgcnt, lsr;
1293
1294         register_bank(iobase, 0);
1295
1296         IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1297 #if 0
1298         /* Disable Rx */
1299         register_bank(iobase, 0);
1300         outb(0x00, iobase+IRCC_LCR_B);
1301 #endif
1302         register_bank(iobase, 0);
1303         outb(inb(iobase+IRCC_LSAR) & ~IRCC_LSAR_ADDRESS_MASK, iobase+IRCC_LSAR);
1304         lsr= inb(iobase+IRCC_LSR);
1305         msgcnt = inb(iobase+IRCC_LCR_B) & 0x08;
1306
1307         IRDA_DEBUG(2, "%s: dma count = %d\n", __FUNCTION__,
1308                    get_dma_residue(self->io.dma));
1309
1310         len = self->rx_buff.truesize - get_dma_residue(self->io.dma);
1311
1312         /* Look for errors
1313          */
1314
1315         if(lsr & (IRCC_LSR_FRAME_ERROR | IRCC_LSR_CRC_ERROR | IRCC_LSR_SIZE_ERROR)) {
1316                 self->stats.rx_errors++;
1317                 if(lsr & IRCC_LSR_FRAME_ERROR) self->stats.rx_frame_errors++;
1318                 if(lsr & IRCC_LSR_CRC_ERROR) self->stats.rx_crc_errors++;
1319                 if(lsr & IRCC_LSR_SIZE_ERROR) self->stats.rx_length_errors++;
1320                 if(lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN)) self->stats.rx_length_errors++;
1321                 return;
1322         }
1323         /* Remove CRC */
1324         if (self->io.speed < 4000000)
1325                 len -= 2;
1326         else
1327                 len -= 4;
1328
1329         if ((len < 2) || (len > 2050)) {
1330                 IRDA_WARNING("%s(), bogus len=%d\n", __FUNCTION__, len);
1331                 return;
1332         }
1333         IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __FUNCTION__, msgcnt, len);
1334
1335         skb = dev_alloc_skb(len+1);
1336         if (!skb)  {
1337                 IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
1338                              __FUNCTION__);
1339                 return;
1340         }
1341         /* Make sure IP header gets aligned */
1342         skb_reserve(skb, 1);
1343
1344         memcpy(skb_put(skb, len), self->rx_buff.data, len);
1345         self->stats.rx_packets++;
1346         self->stats.rx_bytes += len;
1347
1348         skb->dev = self->netdev;
1349         skb->mac.raw  = skb->data;
1350         skb->protocol = htons(ETH_P_IRDA);
1351         netif_rx(skb);
1352 }
1353
1354 /*
1355  * Function smsc_ircc_sir_receive (self)
1356  *
1357  *    Receive one frame from the infrared port
1358  *
1359  */
1360 static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self)
1361 {
1362         int boguscount = 0;
1363         int iobase;
1364
1365         IRDA_ASSERT(self != NULL, return;);
1366
1367         iobase = self->io.sir_base;
1368
1369         /*
1370          * Receive all characters in Rx FIFO, unwrap and unstuff them.
1371          * async_unwrap_char will deliver all found frames
1372          */
1373         do {
1374                 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
1375                                   inb(iobase+UART_RX));
1376
1377                 /* Make sure we don't stay here to long */
1378                 if (boguscount++ > 32) {
1379                         IRDA_DEBUG(2, "%s(), breaking!\n", __FUNCTION__);
1380                         break;
1381                 }
1382         } while (inb(iobase+UART_LSR) & UART_LSR_DR);
1383 }
1384
1385
1386 /*
1387  * Function smsc_ircc_interrupt (irq, dev_id, regs)
1388  *
1389  *    An interrupt from the chip has arrived. Time to do some work
1390  *
1391  */
1392 static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1393 {
1394         struct net_device *dev = (struct net_device *) dev_id;
1395         struct smsc_ircc_cb *self;
1396         int iobase, iir, lcra, lsr;
1397         irqreturn_t ret = IRQ_NONE;
1398
1399         if (dev == NULL) {
1400                 printk(KERN_WARNING "%s: irq %d for unknown device.\n",
1401                        driver_name, irq);
1402                 goto irq_ret;
1403         }
1404         self = (struct smsc_ircc_cb *) dev->priv;
1405         IRDA_ASSERT(self != NULL, return IRQ_NONE;);
1406
1407         /* Serialise the interrupt handler in various CPUs, stop Tx path */
1408         spin_lock(&self->lock);
1409
1410         /* Check if we should use the SIR interrupt handler */
1411         if (self->io.speed <=  SMSC_IRCC2_MAX_SIR_SPEED) {
1412                 ret = smsc_ircc_interrupt_sir(dev);
1413                 goto irq_ret_unlock;
1414         }
1415
1416         iobase = self->io.fir_base;
1417
1418         register_bank(iobase, 0);
1419         iir = inb(iobase+IRCC_IIR);
1420         if (iir == 0)
1421                 goto irq_ret_unlock;
1422         ret = IRQ_HANDLED;
1423
1424         /* Disable interrupts */
1425         outb(0, iobase+IRCC_IER);
1426         lcra = inb(iobase+IRCC_LCR_A);
1427         lsr = inb(iobase+IRCC_LSR);
1428
1429         IRDA_DEBUG(2, "%s(), iir = 0x%02x\n", __FUNCTION__, iir);
1430
1431         if (iir & IRCC_IIR_EOM) {
1432                 if (self->io.direction == IO_RECV)
1433                         smsc_ircc_dma_receive_complete(self, iobase);
1434                 else
1435                         smsc_ircc_dma_xmit_complete(self, iobase);
1436
1437                 smsc_ircc_dma_receive(self, iobase);
1438         }
1439
1440         if (iir & IRCC_IIR_ACTIVE_FRAME) {
1441                 /*printk(KERN_WARNING "%s(): Active Frame\n", __FUNCTION__);*/
1442         }
1443
1444         /* Enable interrupts again */
1445
1446         register_bank(iobase, 0);
1447         outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, iobase+IRCC_IER);
1448
1449  irq_ret_unlock:
1450         spin_unlock(&self->lock);
1451  irq_ret:
1452         return ret;
1453 }
1454
1455 /*
1456  * Function irport_interrupt_sir (irq, dev_id, regs)
1457  *
1458  *    Interrupt handler for SIR modes
1459  */
1460 static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev)
1461 {
1462         struct smsc_ircc_cb *self = dev->priv;
1463         int boguscount = 0;
1464         int iobase;
1465         int iir, lsr;
1466
1467         /* Already locked comming here in smsc_ircc_interrupt() */
1468         /*spin_lock(&self->lock);*/
1469
1470         iobase = self->io.sir_base;
1471
1472         iir = inb(iobase+UART_IIR) & UART_IIR_ID;
1473         if (iir == 0)
1474                 return IRQ_NONE;
1475         while (iir) {
1476                 /* Clear interrupt */
1477                 lsr = inb(iobase+UART_LSR);
1478
1479                 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
1480                             __FUNCTION__, iir, lsr, iobase);
1481
1482                 switch (iir) {
1483                 case UART_IIR_RLSI:
1484                         IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
1485                         break;
1486                 case UART_IIR_RDI:
1487                         /* Receive interrupt */
1488                         smsc_ircc_sir_receive(self);
1489                         break;
1490                 case UART_IIR_THRI:
1491                         if (lsr & UART_LSR_THRE)
1492                                 /* Transmitter ready for data */
1493                                 smsc_ircc_sir_write_wakeup(self);
1494                         break;
1495                 default:
1496                         IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n",
1497                                    __FUNCTION__, iir);
1498                         break;
1499                 }
1500
1501                 /* Make sure we don't stay here to long */
1502                 if (boguscount++ > 100)
1503                         break;
1504
1505                 iir = inb(iobase + UART_IIR) & UART_IIR_ID;
1506         }
1507         /*spin_unlock(&self->lock);*/
1508         return IRQ_HANDLED;
1509 }
1510
1511
1512 #if 0 /* unused */
1513 /*
1514  * Function ircc_is_receiving (self)
1515  *
1516  *    Return TRUE is we are currently receiving a frame
1517  *
1518  */
1519 static int ircc_is_receiving(struct smsc_ircc_cb *self)
1520 {
1521         int status = FALSE;
1522         /* int iobase; */
1523
1524         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1525
1526         IRDA_ASSERT(self != NULL, return FALSE;);
1527
1528         IRDA_DEBUG(0, "%s: dma count = %d\n", __FUNCTION__,
1529                    get_dma_residue(self->io.dma));
1530
1531         status = (self->rx_buff.state != OUTSIDE_FRAME);
1532
1533         return status;
1534 }
1535 #endif /* unused */
1536
1537
1538 /*
1539  * Function smsc_ircc_net_open (dev)
1540  *
1541  *    Start the device
1542  *
1543  */
1544 static int smsc_ircc_net_open(struct net_device *dev)
1545 {
1546         struct smsc_ircc_cb *self;
1547         int iobase;
1548         char hwname[16];
1549         unsigned long flags;
1550
1551         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1552
1553         IRDA_ASSERT(dev != NULL, return -1;);
1554         self = (struct smsc_ircc_cb *) dev->priv;
1555         IRDA_ASSERT(self != NULL, return 0;);
1556
1557         iobase = self->io.fir_base;
1558
1559         if (request_irq(self->io.irq, smsc_ircc_interrupt, 0, dev->name,
1560                         (void *) dev)) {
1561                 IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n",
1562                            __FUNCTION__, self->io.irq);
1563                 return -EAGAIN;
1564         }
1565
1566         spin_lock_irqsave(&self->lock, flags);
1567         /*smsc_ircc_sir_start(self);*/
1568         self->io.speed = 0;
1569         smsc_ircc_change_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
1570         spin_unlock_irqrestore(&self->lock, flags);
1571
1572         /* Give self a hardware name */
1573         /* It would be cool to offer the chip revision here - Jean II */
1574         sprintf(hwname, "SMSC @ 0x%03x", self->io.fir_base);
1575
1576         /*
1577          * Open new IrLAP layer instance, now that everything should be
1578          * initialized properly
1579          */
1580         self->irlap = irlap_open(dev, &self->qos, hwname);
1581
1582         /*
1583          * Always allocate the DMA channel after the IRQ,
1584          * and clean up on failure.
1585          */
1586         if (request_dma(self->io.dma, dev->name)) {
1587                 smsc_ircc_net_close(dev);
1588
1589                 IRDA_WARNING("%s(), unable to allocate DMA=%d\n",
1590                              __FUNCTION__, self->io.dma);
1591                 return -EAGAIN;
1592         }
1593
1594         netif_start_queue(dev);
1595
1596         return 0;
1597 }
1598
1599 /*
1600  * Function smsc_ircc_net_close (dev)
1601  *
1602  *    Stop the device
1603  *
1604  */
1605 static int smsc_ircc_net_close(struct net_device *dev)
1606 {
1607         struct smsc_ircc_cb *self;
1608         int iobase;
1609
1610         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1611
1612         IRDA_ASSERT(dev != NULL, return -1;);
1613         self = (struct smsc_ircc_cb *) dev->priv;
1614         IRDA_ASSERT(self != NULL, return 0;);
1615
1616         iobase = self->io.fir_base;
1617
1618         /* Stop device */
1619         netif_stop_queue(dev);
1620
1621         /* Stop and remove instance of IrLAP */
1622         if (self->irlap)
1623                 irlap_close(self->irlap);
1624         self->irlap = NULL;
1625
1626         free_irq(self->io.irq, dev);
1627
1628         disable_dma(self->io.dma);
1629
1630         free_dma(self->io.dma);
1631
1632         return 0;
1633 }
1634
1635
1636 static void smsc_ircc_suspend(struct smsc_ircc_cb *self)
1637 {
1638         IRDA_MESSAGE("%s, Suspending\n", driver_name);
1639
1640         if (self->io.suspended)
1641                 return;
1642
1643         smsc_ircc_net_close(self->netdev);
1644
1645         self->io.suspended = 1;
1646 }
1647
1648 static void smsc_ircc_wakeup(struct smsc_ircc_cb *self)
1649 {
1650         if (!self->io.suspended)
1651                 return;
1652
1653         /* The code was doing a "cli()" here, but this can't be right.
1654          * If you need protection, do it in net_open with a spinlock
1655          * or give a good reason. - Jean II */
1656
1657         smsc_ircc_net_open(self->netdev);
1658
1659         IRDA_MESSAGE("%s, Waking up\n", driver_name);
1660 }
1661
1662 static int smsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data)
1663 {
1664         struct smsc_ircc_cb *self = (struct smsc_ircc_cb*) dev->data;
1665         if (self) {
1666                 switch (rqst) {
1667                 case PM_SUSPEND:
1668                         smsc_ircc_suspend(self);
1669                         break;
1670                 case PM_RESUME:
1671                         smsc_ircc_wakeup(self);
1672                         break;
1673                 }
1674         }
1675         return 0;
1676 }
1677
1678 /*
1679  * Function smsc_ircc_close (self)
1680  *
1681  *    Close driver instance
1682  *
1683  */
1684 static int __exit smsc_ircc_close(struct smsc_ircc_cb *self)
1685 {
1686         int iobase;
1687         unsigned long flags;
1688
1689         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1690
1691         IRDA_ASSERT(self != NULL, return -1;);
1692
1693         iobase = self->io.fir_base;
1694
1695         if (self->pmdev)
1696                 pm_unregister(self->pmdev);
1697
1698         /* Remove netdevice */
1699         unregister_netdev(self->netdev);
1700
1701         /* Make sure the irq handler is not exectuting */
1702         spin_lock_irqsave(&self->lock, flags);
1703
1704         /* Stop interrupts */
1705         register_bank(iobase, 0);
1706         outb(0, iobase+IRCC_IER);
1707         outb(IRCC_MASTER_RESET, iobase+IRCC_MASTER);
1708         outb(0x00, iobase+IRCC_MASTER);
1709 #if 0
1710         /* Reset to SIR mode */
1711         register_bank(iobase, 1);
1712         outb(IRCC_CFGA_IRDA_SIR_A|IRCC_CFGA_TX_POLARITY, iobase+IRCC_SCE_CFGA);
1713         outb(IRCC_CFGB_IR, iobase+IRCC_SCE_CFGB);
1714 #endif
1715         spin_unlock_irqrestore(&self->lock, flags);
1716
1717         /* Release the PORTS that this driver is using */
1718         IRDA_DEBUG(0, "%s(), releasing 0x%03x\n",  __FUNCTION__,
1719                    self->io.fir_base);
1720
1721         release_region(self->io.fir_base, self->io.fir_ext);
1722
1723         IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
1724                    self->io.sir_base);
1725
1726         release_region(self->io.sir_base, self->io.sir_ext);
1727
1728         if (self->tx_buff.head)
1729                 dma_free_coherent(NULL, self->tx_buff.truesize,
1730                                   self->tx_buff.head, self->tx_buff_dma);
1731
1732         if (self->rx_buff.head)
1733                 dma_free_coherent(NULL, self->rx_buff.truesize,
1734                                   self->rx_buff.head, self->rx_buff_dma);
1735
1736         free_netdev(self->netdev);
1737
1738         return 0;
1739 }
1740
1741 static void __exit smsc_ircc_cleanup(void)
1742 {
1743         int i;
1744
1745         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
1746
1747         for (i=0; i < 2; i++) {
1748                 if (dev_self[i])
1749                         smsc_ircc_close(dev_self[i]);
1750         }
1751 }
1752
1753 /*
1754  *      Start SIR operations
1755  *
1756  * This function *must* be called with spinlock held, because it may
1757  * be called from the irq handler (via smsc_ircc_change_speed()). - Jean II
1758  */
1759 void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
1760 {
1761         struct net_device *dev;
1762         int fir_base, sir_base;
1763
1764         IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1765
1766         IRDA_ASSERT(self != NULL, return;);
1767         dev= self->netdev;
1768         IRDA_ASSERT(dev != NULL, return;);
1769         dev->hard_start_xmit = &smsc_ircc_hard_xmit_sir;
1770
1771         fir_base = self->io.fir_base;
1772         sir_base = self->io.sir_base;
1773
1774         /* Reset everything */
1775         outb(IRCC_MASTER_RESET, fir_base+IRCC_MASTER);
1776
1777         #if SMSC_IRCC2_C_SIR_STOP
1778         /*smsc_ircc_sir_stop(self);*/
1779         #endif
1780
1781         register_bank(fir_base, 1);
1782         outb(((inb(fir_base+IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | IRCC_CFGA_IRDA_SIR_A), fir_base+IRCC_SCE_CFGA);
1783
1784         /* Initialize UART */
1785         outb(UART_LCR_WLEN8, sir_base+UART_LCR);  /* Reset DLAB */
1786         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), sir_base+UART_MCR);
1787
1788         /* Turn on interrups */
1789         outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, sir_base+UART_IER);
1790
1791         IRDA_DEBUG(3, "%s() - exit\n", __FUNCTION__);
1792
1793         outb(0x00, fir_base+IRCC_MASTER);
1794 }
1795
1796 #if SMSC_IRCC2_C_SIR_STOP
1797 void smsc_ircc_sir_stop(struct smsc_ircc_cb *self)
1798 {
1799         int iobase;
1800
1801         IRDA_DEBUG(3, "%s\n", __FUNCTION__);
1802         iobase = self->io.sir_base;
1803
1804         /* Reset UART */
1805         outb(0, iobase+UART_MCR);
1806
1807         /* Turn off interrupts */
1808         outb(0, iobase+UART_IER);
1809 }
1810 #endif
1811
1812 /*
1813  * Function smsc_sir_write_wakeup (self)
1814  *
1815  *    Called by the SIR interrupt handler when there's room for more data.
1816  *    If we have more packets to send, we send them here.
1817  *
1818  */
1819 static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self)
1820 {
1821         int actual = 0;
1822         int iobase;
1823         int fcr;
1824
1825         IRDA_ASSERT(self != NULL, return;);
1826
1827         IRDA_DEBUG(4, "%s\n", __FUNCTION__);
1828
1829         iobase = self->io.sir_base;
1830
1831         /* Finished with frame?  */
1832         if (self->tx_buff.len > 0)  {
1833                 /* Write data left in transmit buffer */
1834                 actual = smsc_ircc_sir_write(iobase, self->io.fifo_size,
1835                                       self->tx_buff.data, self->tx_buff.len);
1836                 self->tx_buff.data += actual;
1837                 self->tx_buff.len  -= actual;
1838         } else {
1839
1840         /*if (self->tx_buff.len ==0)  {*/
1841
1842                 /*
1843                  *  Now serial buffer is almost free & we can start
1844                  *  transmission of another packet. But first we must check
1845                  *  if we need to change the speed of the hardware
1846                  */
1847                 if (self->new_speed) {
1848                         IRDA_DEBUG(5, "%s(), Changing speed to %d.\n",
1849                                    __FUNCTION__, self->new_speed);
1850                         smsc_ircc_sir_wait_hw_transmitter_finish(self);
1851                         smsc_ircc_change_speed(self, self->new_speed);
1852                         self->new_speed = 0;
1853                 } else {
1854                         /* Tell network layer that we want more frames */
1855                         netif_wake_queue(self->netdev);
1856                 }
1857                 self->stats.tx_packets++;
1858
1859                 if(self->io.speed <= 115200) {
1860                 /*
1861                  * Reset Rx FIFO to make sure that all reflected transmit data
1862                  * is discarded. This is needed for half duplex operation
1863                  */
1864                 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR;
1865                 if (self->io.speed < 38400)
1866                         fcr |= UART_FCR_TRIGGER_1;
1867                 else
1868                         fcr |= UART_FCR_TRIGGER_14;
1869
1870                 outb(fcr, iobase+UART_FCR);
1871
1872                 /* Turn on receive interrupts */
1873                 outb(UART_IER_RDI, iobase+UART_IER);
1874                 }
1875         }
1876 }
1877
1878 /*
1879  * Function smsc_ircc_sir_write (iobase, fifo_size, buf, len)
1880  *
1881  *    Fill Tx FIFO with transmit data
1882  *
1883  */
1884 static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1885 {
1886         int actual = 0;
1887
1888         /* Tx FIFO should be empty! */
1889         if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1890                 IRDA_WARNING("%s(), failed, fifo not empty!\n", __FUNCTION__);
1891                 return 0;
1892         }
1893
1894         /* Fill FIFO with current frame */
1895         while ((fifo_size-- > 0) && (actual < len)) {
1896                 /* Transmit next byte */
1897                 outb(buf[actual], iobase+UART_TX);
1898                 actual++;
1899         }
1900         return actual;
1901 }
1902
1903 /*
1904  * Function smsc_ircc_is_receiving (self)
1905  *
1906  *    Returns true is we are currently receiving data
1907  *
1908  */
1909 static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self)
1910 {
1911         return (self->rx_buff.state != OUTSIDE_FRAME);
1912 }
1913
1914
1915 /*
1916  * Function smsc_ircc_probe_transceiver(self)
1917  *
1918  *    Tries to find the used Transceiver
1919  *
1920  */
1921 static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self)
1922 {
1923         unsigned int    i;
1924
1925         IRDA_ASSERT(self != NULL, return;);
1926
1927         for(i=0; smsc_transceivers[i].name!=NULL; i++)
1928                 if((*smsc_transceivers[i].probe)(self->io.fir_base)) {
1929                         IRDA_MESSAGE(" %s transceiver found\n",
1930                                      smsc_transceivers[i].name);
1931                         self->transceiver= i+1;
1932                         return;
1933                 }
1934         IRDA_MESSAGE("No transceiver found. Defaulting to %s\n",
1935                      smsc_transceivers[SMSC_IRCC2_C_DEFAULT_TRANSCEIVER].name);
1936
1937         self->transceiver= SMSC_IRCC2_C_DEFAULT_TRANSCEIVER;
1938 }
1939
1940
1941 /*
1942  * Function smsc_ircc_set_transceiver_for_speed(self, speed)
1943  *
1944  *    Set the transceiver according to the speed
1945  *
1946  */
1947 static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed)
1948 {
1949         unsigned int trx;
1950
1951         trx = self->transceiver;
1952         if(trx>0) (*smsc_transceivers[trx-1].set_for_speed)(self->io.fir_base, speed);
1953 }
1954
1955 /*
1956  * Function smsc_ircc_wait_hw_transmitter_finish ()
1957  *
1958  *    Wait for the real end of HW transmission
1959  *
1960  * The UART is a strict FIFO, and we get called only when we have finished
1961  * pushing data to the FIFO, so the maximum amount of time we must wait
1962  * is only for the FIFO to drain out.
1963  *
1964  * We use a simple calibrated loop. We may need to adjust the loop
1965  * delay (udelay) to balance I/O traffic and latency. And we also need to
1966  * adjust the maximum timeout.
1967  * It would probably be better to wait for the proper interrupt,
1968  * but it doesn't seem to be available.
1969  *
1970  * We can't use jiffies or kernel timers because :
1971  * 1) We are called from the interrupt handler, which disable softirqs,
1972  * so jiffies won't be increased
1973  * 2) Jiffies granularity is usually very coarse (10ms), and we don't
1974  * want to wait that long to detect stuck hardware.
1975  * Jean II
1976  */
1977
1978 static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self)
1979 {
1980         int iobase;
1981         int count = SMSC_IRCC2_HW_TRANSMITTER_TIMEOUT_US;
1982
1983         iobase = self->io.sir_base;
1984
1985         /* Calibrated busy loop */
1986         while((count-- > 0) && !(inb(iobase+UART_LSR) & UART_LSR_TEMT))
1987                 udelay(1);
1988
1989         if(count == 0)
1990                 IRDA_DEBUG(0, "%s(): stuck transmitter\n", __FUNCTION__);
1991 }
1992
1993
1994 /* PROBING
1995  *
1996  *
1997  */
1998
1999 static int __init smsc_ircc_look_for_chips(void)
2000 {
2001         smsc_chip_address_t *address;
2002         char    *type;
2003         unsigned int cfg_base, found;
2004
2005         found = 0;
2006         address = possible_addresses;
2007
2008         while(address->cfg_base){
2009                 cfg_base = address->cfg_base;
2010
2011                 /*printk(KERN_WARNING "%s(): probing: 0x%02x for: 0x%02x\n", __FUNCTION__, cfg_base, address->type);*/
2012
2013                 if( address->type & SMSCSIO_TYPE_FDC){
2014                         type = "FDC";
2015                         if((address->type) & SMSCSIO_TYPE_FLAT) {
2016                                 if(!smsc_superio_flat(fdc_chips_flat,cfg_base, type)) found++;
2017                         }
2018                         if((address->type) & SMSCSIO_TYPE_PAGED) {
2019                                 if(!smsc_superio_paged(fdc_chips_paged,cfg_base, type)) found++;
2020                         }
2021                 }
2022                 if( address->type & SMSCSIO_TYPE_LPC){
2023                         type = "LPC";
2024                         if((address->type) & SMSCSIO_TYPE_FLAT) {
2025                                 if(!smsc_superio_flat(lpc_chips_flat,cfg_base,type)) found++;
2026                         }
2027                         if((address->type) & SMSCSIO_TYPE_PAGED) {
2028                                 if(!smsc_superio_paged(lpc_chips_paged,cfg_base,"LPC")) found++;
2029                         }
2030                 }
2031                 address++;
2032         }
2033         return found;
2034 }
2035
2036 /*
2037  * Function smsc_superio_flat (chip, base, type)
2038  *
2039  *    Try to get configuration of a smc SuperIO chip with flat register model
2040  *
2041  */
2042 static int __init smsc_superio_flat(const smsc_chip_t *chips, unsigned short cfgbase, char *type)
2043 {
2044         unsigned short firbase, sirbase;
2045         u8 mode, dma, irq;
2046         int ret = -ENODEV;
2047
2048         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2049
2050         if (smsc_ircc_probe(cfgbase, SMSCSIOFLAT_DEVICEID_REG, chips, type)==NULL)
2051                 return ret;
2052
2053         outb(SMSCSIOFLAT_UARTMODE0C_REG, cfgbase);
2054         mode = inb(cfgbase+1);
2055
2056         /*printk(KERN_WARNING "%s(): mode: 0x%02x\n", __FUNCTION__, mode);*/
2057
2058         if(!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
2059                 IRDA_WARNING("%s(): IrDA not enabled\n", __FUNCTION__);
2060
2061         outb(SMSCSIOFLAT_UART2BASEADDR_REG, cfgbase);
2062         sirbase = inb(cfgbase+1) << 2;
2063
2064         /* FIR iobase */
2065         outb(SMSCSIOFLAT_FIRBASEADDR_REG, cfgbase);
2066         firbase = inb(cfgbase+1) << 3;
2067
2068         /* DMA */
2069         outb(SMSCSIOFLAT_FIRDMASELECT_REG, cfgbase);
2070         dma = inb(cfgbase+1) & SMSCSIOFLAT_FIRDMASELECT_MASK;
2071
2072         /* IRQ */
2073         outb(SMSCSIOFLAT_UARTIRQSELECT_REG, cfgbase);
2074         irq = inb(cfgbase+1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
2075
2076         IRDA_MESSAGE("%s(): fir: 0x%02x, sir: 0x%02x, dma: %02d, irq: %d, mode: 0x%02x\n", __FUNCTION__, firbase, sirbase, dma, irq, mode);
2077
2078         if (firbase) {
2079                 if (smsc_ircc_open(firbase, sirbase, dma, irq) == 0)
2080                         ret=0;
2081         }
2082
2083         /* Exit configuration */
2084         outb(SMSCSIO_CFGEXITKEY, cfgbase);
2085
2086         return ret;
2087 }
2088
2089 /*
2090  * Function smsc_superio_paged (chip, base, type)
2091  *
2092  *    Try  to get configuration of a smc SuperIO chip with paged register model
2093  *
2094  */
2095 static int __init smsc_superio_paged(const smsc_chip_t *chips, unsigned short cfg_base, char *type)
2096 {
2097         unsigned short fir_io, sir_io;
2098         int ret = -ENODEV;
2099
2100         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2101
2102         if (smsc_ircc_probe(cfg_base,0x20,chips,type)==NULL)
2103                 return ret;
2104
2105         /* Select logical device (UART2) */
2106         outb(0x07, cfg_base);
2107         outb(0x05, cfg_base + 1);
2108
2109         /* SIR iobase */
2110         outb(0x60, cfg_base);
2111         sir_io  = inb(cfg_base + 1) << 8;
2112         outb(0x61, cfg_base);
2113         sir_io |= inb(cfg_base + 1);
2114
2115         /* Read FIR base */
2116         outb(0x62, cfg_base);
2117         fir_io = inb(cfg_base + 1) << 8;
2118         outb(0x63, cfg_base);
2119         fir_io |= inb(cfg_base + 1);
2120         outb(0x2b, cfg_base); /* ??? */
2121
2122         if (fir_io) {
2123                 if (smsc_ircc_open(fir_io, sir_io, ircc_dma, ircc_irq) == 0)
2124                         ret=0;
2125         }
2126
2127         /* Exit configuration */
2128         outb(SMSCSIO_CFGEXITKEY, cfg_base);
2129
2130         return ret;
2131 }
2132
2133
2134 static int __init smsc_access(unsigned short cfg_base,unsigned char reg)
2135 {
2136         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2137
2138         outb(reg, cfg_base);
2139
2140         if (inb(cfg_base)!=reg)
2141                 return -1;
2142
2143         return 0;
2144 }
2145
2146 static const smsc_chip_t * __init smsc_ircc_probe(unsigned short cfg_base,u8 reg,const smsc_chip_t *chip,char *type)
2147 {
2148         u8 devid,xdevid,rev;
2149
2150         IRDA_DEBUG(1, "%s\n", __FUNCTION__);
2151
2152         /* Leave configuration */
2153
2154         outb(SMSCSIO_CFGEXITKEY, cfg_base);
2155
2156         if (inb(cfg_base) == SMSCSIO_CFGEXITKEY)        /* not a smc superio chip */
2157                 return NULL;
2158
2159         outb(reg, cfg_base);
2160
2161         xdevid=inb(cfg_base+1);
2162
2163         /* Enter configuration */
2164
2165         outb(SMSCSIO_CFGACCESSKEY, cfg_base);
2166
2167         #if 0
2168         if (smsc_access(cfg_base,0x55)) /* send second key and check */
2169                 return NULL;
2170         #endif
2171
2172         /* probe device ID */
2173
2174         if (smsc_access(cfg_base,reg))
2175                 return NULL;
2176
2177         devid=inb(cfg_base+1);
2178
2179         if (devid==0)                   /* typical value for unused port */
2180                 return NULL;
2181
2182         if (devid==0xff)                /* typical value for unused port */
2183                 return NULL;
2184
2185         /* probe revision ID */
2186
2187         if (smsc_access(cfg_base,reg+1))
2188                 return NULL;
2189
2190         rev=inb(cfg_base+1);
2191
2192         if (rev>=128)                   /* i think this will make no sense */
2193                 return NULL;
2194
2195         if (devid==xdevid)              /* protection against false positives */
2196                 return NULL;
2197
2198         /* Check for expected device ID; are there others? */
2199
2200         while(chip->devid!=devid) {
2201
2202                 chip++;
2203
2204                 if (chip->name==NULL)
2205                         return NULL;
2206         }
2207
2208         IRDA_MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%s\n",devid,rev,cfg_base,type,chip->name);
2209
2210         if (chip->rev>rev){
2211                 IRDA_MESSAGE("Revision higher than expected\n");
2212                 return NULL;
2213         }
2214
2215         if (chip->flags&NoIRDA)
2216                 IRDA_MESSAGE("chipset does not support IRDA\n");
2217
2218         return chip;
2219 }
2220
2221 static int __init smsc_superio_fdc(unsigned short cfg_base)
2222 {
2223         int ret = -1;
2224
2225         if (!request_region(cfg_base, 2, driver_name)) {
2226                 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2227                              __FUNCTION__, cfg_base);
2228         } else {
2229                 if (!smsc_superio_flat(fdc_chips_flat,cfg_base,"FDC")
2230                     ||!smsc_superio_paged(fdc_chips_paged,cfg_base,"FDC"))
2231                         ret =  0;
2232
2233                 release_region(cfg_base, 2);
2234         }
2235
2236         return ret;
2237 }
2238
2239 static int __init smsc_superio_lpc(unsigned short cfg_base)
2240 {
2241         int ret = -1;
2242
2243         if (!request_region(cfg_base, 2, driver_name)) {
2244                 IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
2245                              __FUNCTION__, cfg_base);
2246         } else {
2247                 if (!smsc_superio_flat(lpc_chips_flat,cfg_base,"LPC")
2248                     ||!smsc_superio_paged(lpc_chips_paged,cfg_base,"LPC"))
2249                         ret = 0;
2250                 release_region(cfg_base, 2);
2251         }
2252         return ret;
2253 }
2254
2255 /************************************************
2256  *
2257  * Transceivers specific functions
2258  *
2259  ************************************************/
2260
2261
2262 /*
2263  * Function smsc_ircc_set_transceiver_smsc_ircc_atc(fir_base, speed)
2264  *
2265  *    Program transceiver through smsc-ircc ATC circuitry
2266  *
2267  */
2268
2269 static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed)
2270 {
2271         unsigned long jiffies_now, jiffies_timeout;
2272         u8      val;
2273
2274         jiffies_now= jiffies;
2275         jiffies_timeout= jiffies+SMSC_IRCC2_ATC_PROGRAMMING_TIMEOUT_JIFFIES;
2276
2277         /* ATC */
2278         register_bank(fir_base, 4);
2279         outb((inb(fir_base+IRCC_ATC) & IRCC_ATC_MASK) |IRCC_ATC_nPROGREADY|IRCC_ATC_ENABLE, fir_base+IRCC_ATC);
2280         while((val=(inb(fir_base+IRCC_ATC) & IRCC_ATC_nPROGREADY)) && !time_after(jiffies, jiffies_timeout));
2281         if(val)
2282                 IRDA_WARNING("%s(): ATC: 0x%02x\n", __FUNCTION__,
2283                              inb(fir_base+IRCC_ATC));
2284 }
2285
2286 /*
2287  * Function smsc_ircc_probe_transceiver_smsc_ircc_atc(fir_base)
2288  *
2289  *    Probe transceiver smsc-ircc ATC circuitry
2290  *
2291  */
2292
2293 static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base)
2294 {
2295         return 0;
2296 }
2297
2298 /*
2299  * Function smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(self, speed)
2300  *
2301  *    Set transceiver
2302  *
2303  */
2304
2305 static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed)
2306 {
2307         u8      fast_mode;
2308
2309         switch(speed)
2310         {
2311                 default:
2312                 case 576000 :
2313                 fast_mode = 0;
2314                 break;
2315                 case 1152000 :
2316                 case 4000000 :
2317                 fast_mode = IRCC_LCR_A_FAST;
2318                 break;
2319
2320         }
2321         register_bank(fir_base, 0);
2322         outb((inb(fir_base+IRCC_LCR_A) &  0xbf) | fast_mode, fir_base+IRCC_LCR_A);
2323 }
2324
2325 /*
2326  * Function smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(fir_base)
2327  *
2328  *    Probe transceiver
2329  *
2330  */
2331
2332 static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base)
2333 {
2334         return 0;
2335 }
2336
2337 /*
2338  * Function smsc_ircc_set_transceiver_toshiba_sat1800(fir_base, speed)
2339  *
2340  *    Set transceiver
2341  *
2342  */
2343
2344 static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed)
2345 {
2346         u8      fast_mode;
2347
2348         switch(speed)
2349         {
2350                 default:
2351                 case 576000 :
2352                 fast_mode = 0;
2353                 break;
2354                 case 1152000 :
2355                 case 4000000 :
2356                 fast_mode = /*IRCC_LCR_A_FAST |*/ IRCC_LCR_A_GP_DATA;
2357                 break;
2358
2359         }
2360         /* This causes an interrupt */
2361         register_bank(fir_base, 0);
2362         outb((inb(fir_base+IRCC_LCR_A) &  0xbf) | fast_mode, fir_base+IRCC_LCR_A);
2363 }
2364
2365 /*
2366  * Function smsc_ircc_probe_transceiver_toshiba_sat1800(fir_base)
2367  *
2368  *    Probe transceiver
2369  *
2370  */
2371
2372 static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base)
2373 {
2374         return 0;
2375 }
2376
2377
2378 module_init(smsc_ircc_init);
2379 module_exit(smsc_ircc_cleanup);
2380
2381 MODULE_AUTHOR("Daniele Peri <peri@csai.unipa.it>");
2382 MODULE_DESCRIPTION("SMC IrCC SIR/FIR controller driver");
2383 MODULE_LICENSE("GPL");
2384
2385 module_param(ircc_dma, int, 0);
2386 MODULE_PARM_DESC(ircc_dma, "DMA channel");
2387 module_param(ircc_irq, int, 0);
2388 MODULE_PARM_DESC(ircc_irq, "IRQ line");
2389 module_param(ircc_fir, int, 0);
2390 MODULE_PARM_DESC(ircc_fir, "FIR Base Address");
2391 module_param(ircc_sir, int, 0);
2392 MODULE_PARM_DESC(ircc_sir, "SIR Base Address");
2393 module_param(ircc_cfg, int, 0);
2394 MODULE_PARM_DESC(ircc_cfg, "Configuration register base address");
2395 module_param(ircc_transceiver, int, 0);
2396 MODULE_PARM_DESC(ircc_transceiver, "Transceiver type");