Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /******************************************************************** |
| 2 | Filename: via-ircc.c |
| 3 | Version: 1.0 |
| 4 | Description: Driver for the VIA VT8231/VT8233 IrDA chipsets |
| 5 | Author: VIA Technologies,inc |
| 6 | Date : 08/06/2003 |
| 7 | |
| 8 | Copyright (c) 1998-2003 VIA Technologies, Inc. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify it under |
| 11 | the terms of the GNU General Public License as published by the Free Software |
| 12 | Foundation; either version 2, or (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, but WITHOUT |
| 15 | ANY WARRANTIES OR REPRESENTATIONS; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 17 | See the GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License along with |
| 20 | this program; if not, write to the Free Software Foundation, Inc., |
| 21 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 22 | |
| 23 | F01 Oct/02/02: Modify code for V0.11(move out back to back transfer) |
| 24 | F02 Oct/28/02: Add SB device ID for 3147 and 3177. |
| 25 | Comment : |
| 26 | jul/09/2002 : only implement two kind of dongle currently. |
| 27 | Oct/02/2002 : work on VT8231 and VT8233 . |
| 28 | Aug/06/2003 : change driver format to pci driver . |
| 29 | |
| 30 | 2004-02-16: <sda@bdit.de> |
| 31 | - Removed unneeded 'legacy' pci stuff. |
| 32 | - Make sure SIR mode is set (hw_init()) before calling mode-dependant stuff. |
| 33 | - On speed change from core, don't send SIR frame with new speed. |
| 34 | Use current speed and change speeds later. |
| 35 | - Make module-param dongle_id actually work. |
| 36 | - New dongle_id 17 (0x11): TDFS4500. Single-ended SIR only. |
| 37 | Tested with home-grown PCB on EPIA boards. |
| 38 | - Code cleanup. |
| 39 | |
| 40 | ********************************************************************/ |
| 41 | #include <linux/module.h> |
| 42 | #include <linux/kernel.h> |
| 43 | #include <linux/types.h> |
| 44 | #include <linux/skbuff.h> |
| 45 | #include <linux/netdevice.h> |
| 46 | #include <linux/ioport.h> |
| 47 | #include <linux/delay.h> |
| 48 | #include <linux/slab.h> |
| 49 | #include <linux/init.h> |
| 50 | #include <linux/rtnetlink.h> |
| 51 | #include <linux/pci.h> |
| 52 | #include <linux/dma-mapping.h> |
| 53 | |
| 54 | #include <asm/io.h> |
| 55 | #include <asm/dma.h> |
| 56 | #include <asm/byteorder.h> |
| 57 | |
| 58 | #include <linux/pm.h> |
| 59 | |
| 60 | #include <net/irda/wrapper.h> |
| 61 | #include <net/irda/irda.h> |
| 62 | #include <net/irda/irda_device.h> |
| 63 | |
| 64 | #include "via-ircc.h" |
| 65 | |
| 66 | #define VIA_MODULE_NAME "via-ircc" |
| 67 | #define CHIP_IO_EXTENT 0x40 |
| 68 | |
| 69 | static char *driver_name = VIA_MODULE_NAME; |
| 70 | |
| 71 | /* Module parameters */ |
| 72 | static int qos_mtt_bits = 0x07; /* 1 ms or more */ |
| 73 | static int dongle_id = 0; /* default: probe */ |
| 74 | |
| 75 | /* We can't guess the type of connected dongle, user *must* supply it. */ |
| 76 | module_param(dongle_id, int, 0); |
| 77 | |
| 78 | /* FIXME : we should not need this, because instances should be automatically |
| 79 | * managed by the PCI layer. Especially that we seem to only be using the |
| 80 | * first entry. Jean II */ |
| 81 | /* Max 4 instances for now */ |
| 82 | static struct via_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL }; |
| 83 | |
| 84 | /* Some prototypes */ |
| 85 | static int via_ircc_open(int i, chipio_t * info, unsigned int id); |
| 86 | static int via_ircc_close(struct via_ircc_cb *self); |
| 87 | static int via_ircc_dma_receive(struct via_ircc_cb *self); |
| 88 | static int via_ircc_dma_receive_complete(struct via_ircc_cb *self, |
| 89 | int iobase); |
| 90 | static int via_ircc_hard_xmit_sir(struct sk_buff *skb, |
| 91 | struct net_device *dev); |
| 92 | static int via_ircc_hard_xmit_fir(struct sk_buff *skb, |
| 93 | struct net_device *dev); |
| 94 | static void via_hw_init(struct via_ircc_cb *self); |
| 95 | static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 baud); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 96 | static irqreturn_t via_ircc_interrupt(int irq, void *dev_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | static int via_ircc_is_receiving(struct via_ircc_cb *self); |
| 98 | static int via_ircc_read_dongle_id(int iobase); |
| 99 | |
| 100 | static int via_ircc_net_open(struct net_device *dev); |
| 101 | static int via_ircc_net_close(struct net_device *dev); |
| 102 | static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, |
| 103 | int cmd); |
| 104 | static struct net_device_stats *via_ircc_net_get_stats(struct net_device |
| 105 | *dev); |
| 106 | static void via_ircc_change_dongle_speed(int iobase, int speed, |
| 107 | int dongle_id); |
| 108 | static int RxTimerHandler(struct via_ircc_cb *self, int iobase); |
| 109 | static void hwreset(struct via_ircc_cb *self); |
| 110 | static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase); |
| 111 | static int upload_rxdata(struct via_ircc_cb *self, int iobase); |
| 112 | static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id); |
| 113 | static void __devexit via_remove_one (struct pci_dev *pdev); |
| 114 | |
| 115 | /* FIXME : Should use udelay() instead, even if we are x86 only - Jean II */ |
| 116 | static void iodelay(int udelay) |
| 117 | { |
| 118 | u8 data; |
| 119 | int i; |
| 120 | |
| 121 | for (i = 0; i < udelay; i++) { |
| 122 | data = inb(0x80); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | static struct pci_device_id via_pci_tbl[] = { |
| 127 | { PCI_VENDOR_ID_VIA, 0x8231, PCI_ANY_ID, PCI_ANY_ID,0,0,0 }, |
| 128 | { PCI_VENDOR_ID_VIA, 0x3109, PCI_ANY_ID, PCI_ANY_ID,0,0,1 }, |
| 129 | { PCI_VENDOR_ID_VIA, 0x3074, PCI_ANY_ID, PCI_ANY_ID,0,0,2 }, |
| 130 | { PCI_VENDOR_ID_VIA, 0x3147, PCI_ANY_ID, PCI_ANY_ID,0,0,3 }, |
| 131 | { PCI_VENDOR_ID_VIA, 0x3177, PCI_ANY_ID, PCI_ANY_ID,0,0,4 }, |
| 132 | { 0, } |
| 133 | }; |
| 134 | |
| 135 | MODULE_DEVICE_TABLE(pci,via_pci_tbl); |
| 136 | |
| 137 | |
| 138 | static struct pci_driver via_driver = { |
| 139 | .name = VIA_MODULE_NAME, |
| 140 | .id_table = via_pci_tbl, |
| 141 | .probe = via_init_one, |
| 142 | .remove = __devexit_p(via_remove_one), |
| 143 | }; |
| 144 | |
| 145 | |
| 146 | /* |
| 147 | * Function via_ircc_init () |
| 148 | * |
| 149 | * Initialize chip. Just find out chip type and resource. |
| 150 | */ |
| 151 | static int __init via_ircc_init(void) |
| 152 | { |
| 153 | int rc; |
| 154 | |
| 155 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 156 | |
| 157 | rc = pci_register_driver(&via_driver); |
| 158 | if (rc < 0) { |
| 159 | IRDA_DEBUG(0, "%s(): error rc = %d, returning -ENODEV...\n", |
| 160 | __FUNCTION__, rc); |
| 161 | return -ENODEV; |
| 162 | } |
| 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id) |
| 167 | { |
| 168 | int rc; |
| 169 | u8 temp,oldPCI_40,oldPCI_44,bTmp,bTmp1; |
| 170 | u16 Chipset,FirDRQ1,FirDRQ0,FirIRQ,FirIOBase; |
| 171 | chipio_t info; |
| 172 | |
| 173 | IRDA_DEBUG(2, "%s(): Device ID=(0X%X)\n", __FUNCTION__, id->device); |
| 174 | |
| 175 | rc = pci_enable_device (pcidev); |
| 176 | if (rc) { |
| 177 | IRDA_DEBUG(0, "%s(): error rc = %d\n", __FUNCTION__, rc); |
| 178 | return -ENODEV; |
| 179 | } |
| 180 | |
| 181 | // South Bridge exist |
| 182 | if ( ReadLPCReg(0x20) != 0x3C ) |
| 183 | Chipset=0x3096; |
| 184 | else |
| 185 | Chipset=0x3076; |
| 186 | |
| 187 | if (Chipset==0x3076) { |
| 188 | IRDA_DEBUG(2, "%s(): Chipset = 3076\n", __FUNCTION__); |
| 189 | |
| 190 | WriteLPCReg(7,0x0c ); |
| 191 | temp=ReadLPCReg(0x30);//check if BIOS Enable Fir |
| 192 | if((temp&0x01)==1) { // BIOS close or no FIR |
| 193 | WriteLPCReg(0x1d, 0x82 ); |
| 194 | WriteLPCReg(0x23,0x18); |
| 195 | temp=ReadLPCReg(0xF0); |
| 196 | if((temp&0x01)==0) { |
| 197 | temp=(ReadLPCReg(0x74)&0x03); //DMA |
| 198 | FirDRQ0=temp + 4; |
| 199 | temp=(ReadLPCReg(0x74)&0x0C) >> 2; |
| 200 | FirDRQ1=temp + 4; |
| 201 | } else { |
| 202 | temp=(ReadLPCReg(0x74)&0x0C) >> 2; //DMA |
| 203 | FirDRQ0=temp + 4; |
| 204 | FirDRQ1=FirDRQ0; |
| 205 | } |
| 206 | FirIRQ=(ReadLPCReg(0x70)&0x0f); //IRQ |
| 207 | FirIOBase=ReadLPCReg(0x60 ) << 8; //IO Space :high byte |
| 208 | FirIOBase=FirIOBase| ReadLPCReg(0x61) ; //low byte |
| 209 | FirIOBase=FirIOBase ; |
| 210 | info.fir_base=FirIOBase; |
| 211 | info.irq=FirIRQ; |
| 212 | info.dma=FirDRQ1; |
| 213 | info.dma2=FirDRQ0; |
| 214 | pci_read_config_byte(pcidev,0x40,&bTmp); |
| 215 | pci_write_config_byte(pcidev,0x40,((bTmp | 0x08) & 0xfe)); |
| 216 | pci_read_config_byte(pcidev,0x42,&bTmp); |
| 217 | pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0)); |
| 218 | pci_write_config_byte(pcidev,0x5a,0xc0); |
| 219 | WriteLPCReg(0x28, 0x70 ); |
| 220 | if (via_ircc_open(0, &info,0x3076) == 0) |
| 221 | rc=0; |
| 222 | } else |
| 223 | rc = -ENODEV; //IR not turn on |
| 224 | } else { //Not VT1211 |
| 225 | IRDA_DEBUG(2, "%s(): Chipset = 3096\n", __FUNCTION__); |
| 226 | |
| 227 | pci_read_config_byte(pcidev,0x67,&bTmp);//check if BIOS Enable Fir |
| 228 | if((bTmp&0x01)==1) { // BIOS enable FIR |
| 229 | //Enable Double DMA clock |
| 230 | pci_read_config_byte(pcidev,0x42,&oldPCI_40); |
| 231 | pci_write_config_byte(pcidev,0x42,oldPCI_40 | 0x80); |
| 232 | pci_read_config_byte(pcidev,0x40,&oldPCI_40); |
| 233 | pci_write_config_byte(pcidev,0x40,oldPCI_40 & 0xf7); |
| 234 | pci_read_config_byte(pcidev,0x44,&oldPCI_44); |
| 235 | pci_write_config_byte(pcidev,0x44,0x4e); |
| 236 | //---------- read configuration from Function0 of south bridge |
| 237 | if((bTmp&0x02)==0) { |
| 238 | pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA |
| 239 | FirDRQ0 = (bTmp1 & 0x30) >> 4; |
| 240 | pci_read_config_byte(pcidev,0x44,&bTmp1); |
| 241 | FirDRQ1 = (bTmp1 & 0xc0) >> 6; |
| 242 | } else { |
| 243 | pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA |
| 244 | FirDRQ0 = (bTmp1 & 0x30) >> 4 ; |
| 245 | FirDRQ1=0; |
| 246 | } |
| 247 | pci_read_config_byte(pcidev,0x47,&bTmp1); //IRQ |
| 248 | FirIRQ = bTmp1 & 0x0f; |
| 249 | |
| 250 | pci_read_config_byte(pcidev,0x69,&bTmp); |
| 251 | FirIOBase = bTmp << 8;//hight byte |
| 252 | pci_read_config_byte(pcidev,0x68,&bTmp); |
| 253 | FirIOBase = (FirIOBase | bTmp ) & 0xfff0; |
| 254 | //------------------------- |
| 255 | info.fir_base=FirIOBase; |
| 256 | info.irq=FirIRQ; |
| 257 | info.dma=FirDRQ1; |
| 258 | info.dma2=FirDRQ0; |
| 259 | if (via_ircc_open(0, &info,0x3096) == 0) |
| 260 | rc=0; |
| 261 | } else |
| 262 | rc = -ENODEV; //IR not turn on !!!!! |
| 263 | }//Not VT1211 |
| 264 | |
| 265 | IRDA_DEBUG(2, "%s(): End - rc = %d\n", __FUNCTION__, rc); |
| 266 | return rc; |
| 267 | } |
| 268 | |
| 269 | /* |
| 270 | * Function via_ircc_clean () |
| 271 | * |
| 272 | * Close all configured chips |
| 273 | * |
| 274 | */ |
| 275 | static void via_ircc_clean(void) |
| 276 | { |
| 277 | int i; |
| 278 | |
| 279 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 280 | |
Bjorn Helgaas | 9c3bd68 | 2006-08-15 00:05:38 -0700 | [diff] [blame] | 281 | for (i=0; i < ARRAY_SIZE(dev_self); i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | if (dev_self[i]) |
| 283 | via_ircc_close(dev_self[i]); |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | static void __devexit via_remove_one (struct pci_dev *pdev) |
| 288 | { |
| 289 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 290 | |
| 291 | /* FIXME : This is ugly. We should use pci_get_drvdata(pdev); |
| 292 | * to get our driver instance and call directly via_ircc_close(). |
| 293 | * See vlsi_ir for details... |
| 294 | * Jean II */ |
| 295 | via_ircc_clean(); |
| 296 | |
| 297 | /* FIXME : This should be in via_ircc_close(), because here we may |
| 298 | * theoritically disable still configured devices :-( - Jean II */ |
| 299 | pci_disable_device(pdev); |
| 300 | } |
| 301 | |
| 302 | static void __exit via_ircc_cleanup(void) |
| 303 | { |
| 304 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 305 | |
| 306 | /* FIXME : This should be redundant, as pci_unregister_driver() |
| 307 | * should call via_remove_one() on each device. |
| 308 | * Jean II */ |
| 309 | via_ircc_clean(); |
| 310 | |
| 311 | /* Cleanup all instances of the driver */ |
| 312 | pci_unregister_driver (&via_driver); |
| 313 | } |
| 314 | |
| 315 | /* |
| 316 | * Function via_ircc_open (iobase, irq) |
| 317 | * |
| 318 | * Open driver instance |
| 319 | * |
| 320 | */ |
| 321 | static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id) |
| 322 | { |
| 323 | struct net_device *dev; |
| 324 | struct via_ircc_cb *self; |
| 325 | int err; |
| 326 | |
| 327 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 328 | |
Bjorn Helgaas | 9c3bd68 | 2006-08-15 00:05:38 -0700 | [diff] [blame] | 329 | if (i >= ARRAY_SIZE(dev_self)) |
| 330 | return -ENOMEM; |
| 331 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | /* Allocate new instance of the driver */ |
| 333 | dev = alloc_irdadev(sizeof(struct via_ircc_cb)); |
| 334 | if (dev == NULL) |
| 335 | return -ENOMEM; |
| 336 | |
| 337 | self = dev->priv; |
| 338 | self->netdev = dev; |
| 339 | spin_lock_init(&self->lock); |
| 340 | |
| 341 | /* FIXME : We should store our driver instance in the PCI layer, |
| 342 | * using pci_set_drvdata(), not in this array. |
| 343 | * See vlsi_ir for details... - Jean II */ |
| 344 | /* FIXME : 'i' is always 0 (see via_init_one()) :-( - Jean II */ |
| 345 | /* Need to store self somewhere */ |
| 346 | dev_self[i] = self; |
| 347 | self->index = i; |
| 348 | /* Initialize Resource */ |
| 349 | self->io.cfg_base = info->cfg_base; |
| 350 | self->io.fir_base = info->fir_base; |
| 351 | self->io.irq = info->irq; |
| 352 | self->io.fir_ext = CHIP_IO_EXTENT; |
| 353 | self->io.dma = info->dma; |
| 354 | self->io.dma2 = info->dma2; |
| 355 | self->io.fifo_size = 32; |
| 356 | self->chip_id = id; |
| 357 | self->st_fifo.len = 0; |
| 358 | self->RxDataReady = 0; |
| 359 | |
| 360 | /* Reserve the ioports that we need */ |
| 361 | if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) { |
| 362 | IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n", |
| 363 | __FUNCTION__, self->io.fir_base); |
| 364 | err = -ENODEV; |
| 365 | goto err_out1; |
| 366 | } |
| 367 | |
| 368 | /* Initialize QoS for this device */ |
| 369 | irda_init_max_qos_capabilies(&self->qos); |
| 370 | |
| 371 | /* Check if user has supplied the dongle id or not */ |
| 372 | if (!dongle_id) |
| 373 | dongle_id = via_ircc_read_dongle_id(self->io.fir_base); |
| 374 | self->io.dongle_id = dongle_id; |
| 375 | |
| 376 | /* The only value we must override it the baudrate */ |
| 377 | /* Maximum speeds and capabilities are dongle-dependant. */ |
| 378 | switch( self->io.dongle_id ){ |
| 379 | case 0x0d: |
| 380 | self->qos.baud_rate.bits = |
| 381 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 | |
| 382 | IR_576000 | IR_1152000 | (IR_4000000 << 8); |
| 383 | break; |
| 384 | default: |
| 385 | self->qos.baud_rate.bits = |
| 386 | IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200; |
| 387 | break; |
| 388 | } |
| 389 | |
| 390 | /* Following was used for testing: |
| 391 | * |
| 392 | * self->qos.baud_rate.bits = IR_9600; |
| 393 | * |
| 394 | * Is is no good, as it prohibits (error-prone) speed-changes. |
| 395 | */ |
| 396 | |
| 397 | self->qos.min_turn_time.bits = qos_mtt_bits; |
| 398 | irda_qos_bits_to_value(&self->qos); |
| 399 | |
| 400 | /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */ |
| 401 | self->rx_buff.truesize = 14384 + 2048; |
| 402 | self->tx_buff.truesize = 14384 + 2048; |
| 403 | |
| 404 | /* Allocate memory if needed */ |
| 405 | self->rx_buff.head = |
| 406 | dma_alloc_coherent(NULL, self->rx_buff.truesize, |
| 407 | &self->rx_buff_dma, GFP_KERNEL); |
| 408 | if (self->rx_buff.head == NULL) { |
| 409 | err = -ENOMEM; |
| 410 | goto err_out2; |
| 411 | } |
| 412 | memset(self->rx_buff.head, 0, self->rx_buff.truesize); |
| 413 | |
| 414 | self->tx_buff.head = |
| 415 | dma_alloc_coherent(NULL, self->tx_buff.truesize, |
| 416 | &self->tx_buff_dma, GFP_KERNEL); |
| 417 | if (self->tx_buff.head == NULL) { |
| 418 | err = -ENOMEM; |
| 419 | goto err_out3; |
| 420 | } |
| 421 | memset(self->tx_buff.head, 0, self->tx_buff.truesize); |
| 422 | |
| 423 | self->rx_buff.in_frame = FALSE; |
| 424 | self->rx_buff.state = OUTSIDE_FRAME; |
| 425 | self->tx_buff.data = self->tx_buff.head; |
| 426 | self->rx_buff.data = self->rx_buff.head; |
| 427 | |
| 428 | /* Reset Tx queue info */ |
| 429 | self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; |
| 430 | self->tx_fifo.tail = self->tx_buff.head; |
| 431 | |
| 432 | /* Keep track of module usage */ |
| 433 | SET_MODULE_OWNER(dev); |
| 434 | |
| 435 | /* Override the network functions we need to use */ |
| 436 | dev->hard_start_xmit = via_ircc_hard_xmit_sir; |
| 437 | dev->open = via_ircc_net_open; |
| 438 | dev->stop = via_ircc_net_close; |
| 439 | dev->do_ioctl = via_ircc_net_ioctl; |
| 440 | dev->get_stats = via_ircc_net_get_stats; |
| 441 | |
| 442 | err = register_netdev(dev); |
| 443 | if (err) |
| 444 | goto err_out4; |
| 445 | |
| 446 | IRDA_MESSAGE("IrDA: Registered device %s (via-ircc)\n", dev->name); |
| 447 | |
| 448 | /* Initialise the hardware.. |
| 449 | */ |
| 450 | self->io.speed = 9600; |
| 451 | via_hw_init(self); |
| 452 | return 0; |
| 453 | err_out4: |
| 454 | dma_free_coherent(NULL, self->tx_buff.truesize, |
| 455 | self->tx_buff.head, self->tx_buff_dma); |
| 456 | err_out3: |
| 457 | dma_free_coherent(NULL, self->rx_buff.truesize, |
| 458 | self->rx_buff.head, self->rx_buff_dma); |
| 459 | err_out2: |
| 460 | release_region(self->io.fir_base, self->io.fir_ext); |
| 461 | err_out1: |
| 462 | free_netdev(dev); |
| 463 | dev_self[i] = NULL; |
| 464 | return err; |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * Function via_ircc_close (self) |
| 469 | * |
| 470 | * Close driver instance |
| 471 | * |
| 472 | */ |
| 473 | static int via_ircc_close(struct via_ircc_cb *self) |
| 474 | { |
| 475 | int iobase; |
| 476 | |
| 477 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 478 | |
| 479 | IRDA_ASSERT(self != NULL, return -1;); |
| 480 | |
| 481 | iobase = self->io.fir_base; |
| 482 | |
| 483 | ResetChip(iobase, 5); //hardware reset. |
| 484 | /* Remove netdevice */ |
| 485 | unregister_netdev(self->netdev); |
| 486 | |
| 487 | /* Release the PORT that this driver is using */ |
| 488 | IRDA_DEBUG(2, "%s(), Releasing Region %03x\n", |
| 489 | __FUNCTION__, self->io.fir_base); |
| 490 | release_region(self->io.fir_base, self->io.fir_ext); |
| 491 | if (self->tx_buff.head) |
| 492 | dma_free_coherent(NULL, self->tx_buff.truesize, |
| 493 | self->tx_buff.head, self->tx_buff_dma); |
| 494 | if (self->rx_buff.head) |
| 495 | dma_free_coherent(NULL, self->rx_buff.truesize, |
| 496 | self->rx_buff.head, self->rx_buff_dma); |
| 497 | dev_self[self->index] = NULL; |
| 498 | |
| 499 | free_netdev(self->netdev); |
| 500 | |
| 501 | return 0; |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Function via_hw_init(self) |
| 506 | * |
| 507 | * Returns non-negative on success. |
| 508 | * |
| 509 | * Formerly via_ircc_setup |
| 510 | */ |
| 511 | static void via_hw_init(struct via_ircc_cb *self) |
| 512 | { |
| 513 | int iobase = self->io.fir_base; |
| 514 | |
| 515 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 516 | |
| 517 | SetMaxRxPacketSize(iobase, 0x0fff); //set to max:4095 |
| 518 | // FIFO Init |
| 519 | EnRXFIFOReadyInt(iobase, OFF); |
| 520 | EnRXFIFOHalfLevelInt(iobase, OFF); |
| 521 | EnTXFIFOHalfLevelInt(iobase, OFF); |
| 522 | EnTXFIFOUnderrunEOMInt(iobase, ON); |
| 523 | EnTXFIFOReadyInt(iobase, OFF); |
| 524 | InvertTX(iobase, OFF); |
| 525 | InvertRX(iobase, OFF); |
| 526 | |
| 527 | if (ReadLPCReg(0x20) == 0x3c) |
| 528 | WriteLPCReg(0xF0, 0); // for VT1211 |
| 529 | /* Int Init */ |
| 530 | EnRXSpecInt(iobase, ON); |
| 531 | |
| 532 | /* The following is basically hwreset */ |
| 533 | /* If this is the case, why not just call hwreset() ? Jean II */ |
| 534 | ResetChip(iobase, 5); |
| 535 | EnableDMA(iobase, OFF); |
| 536 | EnableTX(iobase, OFF); |
| 537 | EnableRX(iobase, OFF); |
| 538 | EnRXDMA(iobase, OFF); |
| 539 | EnTXDMA(iobase, OFF); |
| 540 | RXStart(iobase, OFF); |
| 541 | TXStart(iobase, OFF); |
| 542 | InitCard(iobase); |
| 543 | CommonInit(iobase); |
| 544 | SIRFilter(iobase, ON); |
| 545 | SetSIR(iobase, ON); |
| 546 | CRC16(iobase, ON); |
| 547 | EnTXCRC(iobase, 0); |
| 548 | WriteReg(iobase, I_ST_CT_0, 0x00); |
| 549 | SetBaudRate(iobase, 9600); |
| 550 | SetPulseWidth(iobase, 12); |
| 551 | SetSendPreambleCount(iobase, 0); |
| 552 | |
| 553 | self->io.speed = 9600; |
| 554 | self->st_fifo.len = 0; |
| 555 | |
| 556 | via_ircc_change_dongle_speed(iobase, self->io.speed, |
| 557 | self->io.dongle_id); |
| 558 | |
| 559 | WriteReg(iobase, I_ST_CT_0, 0x80); |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * Function via_ircc_read_dongle_id (void) |
| 564 | * |
| 565 | */ |
| 566 | static int via_ircc_read_dongle_id(int iobase) |
| 567 | { |
| 568 | int dongle_id = 9; /* Default to IBM */ |
| 569 | |
| 570 | IRDA_ERROR("via-ircc: dongle probing not supported, please specify dongle_id module parameter.\n"); |
| 571 | return dongle_id; |
| 572 | } |
| 573 | |
| 574 | /* |
| 575 | * Function via_ircc_change_dongle_speed (iobase, speed, dongle_id) |
| 576 | * Change speed of the attach dongle |
| 577 | * only implement two type of dongle currently. |
| 578 | */ |
| 579 | static void via_ircc_change_dongle_speed(int iobase, int speed, |
| 580 | int dongle_id) |
| 581 | { |
| 582 | u8 mode = 0; |
| 583 | |
| 584 | /* speed is unused, as we use IsSIROn()/IsMIROn() */ |
| 585 | speed = speed; |
| 586 | |
| 587 | IRDA_DEBUG(1, "%s(): change_dongle_speed to %d for 0x%x, %d\n", |
| 588 | __FUNCTION__, speed, iobase, dongle_id); |
| 589 | |
| 590 | switch (dongle_id) { |
| 591 | |
| 592 | /* Note: The dongle_id's listed here are derived from |
| 593 | * nsc-ircc.c */ |
| 594 | |
| 595 | case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */ |
| 596 | UseOneRX(iobase, ON); // use one RX pin RX1,RX2 |
| 597 | InvertTX(iobase, OFF); |
| 598 | InvertRX(iobase, OFF); |
| 599 | |
| 600 | EnRX2(iobase, ON); //sir to rx2 |
| 601 | EnGPIOtoRX2(iobase, OFF); |
| 602 | |
| 603 | if (IsSIROn(iobase)) { //sir |
| 604 | // Mode select Off |
| 605 | SlowIRRXLowActive(iobase, ON); |
| 606 | udelay(1000); |
| 607 | SlowIRRXLowActive(iobase, OFF); |
| 608 | } else { |
| 609 | if (IsMIROn(iobase)) { //mir |
| 610 | // Mode select On |
| 611 | SlowIRRXLowActive(iobase, OFF); |
| 612 | udelay(20); |
| 613 | } else { // fir |
| 614 | if (IsFIROn(iobase)) { //fir |
| 615 | // Mode select On |
| 616 | SlowIRRXLowActive(iobase, OFF); |
| 617 | udelay(20); |
| 618 | } |
| 619 | } |
| 620 | } |
| 621 | break; |
| 622 | |
| 623 | case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */ |
| 624 | UseOneRX(iobase, ON); //use ONE RX....RX1 |
| 625 | InvertTX(iobase, OFF); |
| 626 | InvertRX(iobase, OFF); // invert RX pin |
| 627 | |
| 628 | EnRX2(iobase, ON); |
| 629 | EnGPIOtoRX2(iobase, OFF); |
| 630 | if (IsSIROn(iobase)) { //sir |
| 631 | // Mode select On |
| 632 | SlowIRRXLowActive(iobase, ON); |
| 633 | udelay(20); |
| 634 | // Mode select Off |
| 635 | SlowIRRXLowActive(iobase, OFF); |
| 636 | } |
| 637 | if (IsMIROn(iobase)) { //mir |
| 638 | // Mode select On |
| 639 | SlowIRRXLowActive(iobase, OFF); |
| 640 | udelay(20); |
| 641 | // Mode select Off |
| 642 | SlowIRRXLowActive(iobase, ON); |
| 643 | } else { // fir |
| 644 | if (IsFIROn(iobase)) { //fir |
| 645 | // Mode select On |
| 646 | SlowIRRXLowActive(iobase, OFF); |
| 647 | // TX On |
| 648 | WriteTX(iobase, ON); |
| 649 | udelay(20); |
| 650 | // Mode select OFF |
| 651 | SlowIRRXLowActive(iobase, ON); |
| 652 | udelay(20); |
| 653 | // TX Off |
| 654 | WriteTX(iobase, OFF); |
| 655 | } |
| 656 | } |
| 657 | break; |
| 658 | |
| 659 | case 0x0d: |
| 660 | UseOneRX(iobase, OFF); // use two RX pin RX1,RX2 |
| 661 | InvertTX(iobase, OFF); |
| 662 | InvertRX(iobase, OFF); |
| 663 | SlowIRRXLowActive(iobase, OFF); |
| 664 | if (IsSIROn(iobase)) { //sir |
| 665 | EnGPIOtoRX2(iobase, OFF); |
| 666 | WriteGIO(iobase, OFF); |
| 667 | EnRX2(iobase, OFF); //sir to rx2 |
| 668 | } else { // fir mir |
| 669 | EnGPIOtoRX2(iobase, OFF); |
| 670 | WriteGIO(iobase, OFF); |
| 671 | EnRX2(iobase, OFF); //fir to rx |
| 672 | } |
| 673 | break; |
| 674 | |
| 675 | case 0x11: /* Temic TFDS4500 */ |
| 676 | |
| 677 | IRDA_DEBUG(2, "%s: Temic TFDS4500: One RX pin, TX normal, RX inverted.\n", __FUNCTION__); |
| 678 | |
| 679 | UseOneRX(iobase, ON); //use ONE RX....RX1 |
| 680 | InvertTX(iobase, OFF); |
| 681 | InvertRX(iobase, ON); // invert RX pin |
| 682 | |
| 683 | EnRX2(iobase, ON); //sir to rx2 |
| 684 | EnGPIOtoRX2(iobase, OFF); |
| 685 | |
| 686 | if( IsSIROn(iobase) ){ //sir |
| 687 | |
| 688 | // Mode select On |
| 689 | SlowIRRXLowActive(iobase, ON); |
| 690 | udelay(20); |
| 691 | // Mode select Off |
| 692 | SlowIRRXLowActive(iobase, OFF); |
| 693 | |
| 694 | } else{ |
| 695 | IRDA_DEBUG(0, "%s: Warning: TFDS4500 not running in SIR mode !\n", __FUNCTION__); |
| 696 | } |
| 697 | break; |
| 698 | |
| 699 | case 0x0ff: /* Vishay */ |
| 700 | if (IsSIROn(iobase)) |
| 701 | mode = 0; |
| 702 | else if (IsMIROn(iobase)) |
| 703 | mode = 1; |
| 704 | else if (IsFIROn(iobase)) |
| 705 | mode = 2; |
| 706 | else if (IsVFIROn(iobase)) |
| 707 | mode = 5; //VFIR-16 |
| 708 | SI_SetMode(iobase, mode); |
| 709 | break; |
| 710 | |
| 711 | default: |
| 712 | IRDA_ERROR("%s: Error: dongle_id %d unsupported !\n", |
| 713 | __FUNCTION__, dongle_id); |
| 714 | } |
| 715 | } |
| 716 | |
| 717 | /* |
| 718 | * Function via_ircc_change_speed (self, baud) |
| 719 | * |
| 720 | * Change the speed of the device |
| 721 | * |
| 722 | */ |
| 723 | static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 speed) |
| 724 | { |
| 725 | struct net_device *dev = self->netdev; |
| 726 | u16 iobase; |
| 727 | u8 value = 0, bTmp; |
| 728 | |
| 729 | iobase = self->io.fir_base; |
| 730 | /* Update accounting for new speed */ |
| 731 | self->io.speed = speed; |
| 732 | IRDA_DEBUG(1, "%s: change_speed to %d bps.\n", __FUNCTION__, speed); |
| 733 | |
| 734 | WriteReg(iobase, I_ST_CT_0, 0x0); |
| 735 | |
| 736 | /* Controller mode sellection */ |
| 737 | switch (speed) { |
| 738 | case 2400: |
| 739 | case 9600: |
| 740 | case 19200: |
| 741 | case 38400: |
| 742 | case 57600: |
| 743 | case 115200: |
| 744 | value = (115200/speed)-1; |
| 745 | SetSIR(iobase, ON); |
| 746 | CRC16(iobase, ON); |
| 747 | break; |
| 748 | case 576000: |
| 749 | /* FIXME: this can't be right, as it's the same as 115200, |
| 750 | * and 576000 is MIR, not SIR. */ |
| 751 | value = 0; |
| 752 | SetSIR(iobase, ON); |
| 753 | CRC16(iobase, ON); |
| 754 | break; |
| 755 | case 1152000: |
| 756 | value = 0; |
| 757 | SetMIR(iobase, ON); |
| 758 | /* FIXME: CRC ??? */ |
| 759 | break; |
| 760 | case 4000000: |
| 761 | value = 0; |
| 762 | SetFIR(iobase, ON); |
| 763 | SetPulseWidth(iobase, 0); |
| 764 | SetSendPreambleCount(iobase, 14); |
| 765 | CRC16(iobase, OFF); |
| 766 | EnTXCRC(iobase, ON); |
| 767 | break; |
| 768 | case 16000000: |
| 769 | value = 0; |
| 770 | SetVFIR(iobase, ON); |
| 771 | /* FIXME: CRC ??? */ |
| 772 | break; |
| 773 | default: |
| 774 | value = 0; |
| 775 | break; |
| 776 | } |
| 777 | |
| 778 | /* Set baudrate to 0x19[2..7] */ |
| 779 | bTmp = (ReadReg(iobase, I_CF_H_1) & 0x03); |
| 780 | bTmp |= value << 2; |
| 781 | WriteReg(iobase, I_CF_H_1, bTmp); |
| 782 | |
| 783 | /* Some dongles may need to be informed about speed changes. */ |
| 784 | via_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id); |
| 785 | |
| 786 | /* Set FIFO size to 64 */ |
| 787 | SetFIFO(iobase, 64); |
| 788 | |
| 789 | /* Enable IR */ |
| 790 | WriteReg(iobase, I_ST_CT_0, 0x80); |
| 791 | |
| 792 | // EnTXFIFOHalfLevelInt(iobase,ON); |
| 793 | |
| 794 | /* Enable some interrupts so we can receive frames */ |
| 795 | //EnAllInt(iobase,ON); |
| 796 | |
| 797 | if (IsSIROn(iobase)) { |
| 798 | SIRFilter(iobase, ON); |
| 799 | SIRRecvAny(iobase, ON); |
| 800 | } else { |
| 801 | SIRFilter(iobase, OFF); |
| 802 | SIRRecvAny(iobase, OFF); |
| 803 | } |
| 804 | |
| 805 | if (speed > 115200) { |
| 806 | /* Install FIR xmit handler */ |
| 807 | dev->hard_start_xmit = via_ircc_hard_xmit_fir; |
| 808 | via_ircc_dma_receive(self); |
| 809 | } else { |
| 810 | /* Install SIR xmit handler */ |
| 811 | dev->hard_start_xmit = via_ircc_hard_xmit_sir; |
| 812 | } |
| 813 | netif_wake_queue(dev); |
| 814 | } |
| 815 | |
| 816 | /* |
| 817 | * Function via_ircc_hard_xmit (skb, dev) |
| 818 | * |
| 819 | * Transmit the frame! |
| 820 | * |
| 821 | */ |
| 822 | static int via_ircc_hard_xmit_sir(struct sk_buff *skb, |
| 823 | struct net_device *dev) |
| 824 | { |
| 825 | struct via_ircc_cb *self; |
| 826 | unsigned long flags; |
| 827 | u16 iobase; |
| 828 | __u32 speed; |
| 829 | |
| 830 | self = (struct via_ircc_cb *) dev->priv; |
| 831 | IRDA_ASSERT(self != NULL, return 0;); |
| 832 | iobase = self->io.fir_base; |
| 833 | |
| 834 | netif_stop_queue(dev); |
| 835 | /* Check if we need to change the speed */ |
| 836 | speed = irda_get_next_speed(skb); |
| 837 | if ((speed != self->io.speed) && (speed != -1)) { |
| 838 | /* Check for empty frame */ |
| 839 | if (!skb->len) { |
| 840 | via_ircc_change_speed(self, speed); |
| 841 | dev->trans_start = jiffies; |
| 842 | dev_kfree_skb(skb); |
| 843 | return 0; |
| 844 | } else |
| 845 | self->new_speed = speed; |
| 846 | } |
| 847 | InitCard(iobase); |
| 848 | CommonInit(iobase); |
| 849 | SIRFilter(iobase, ON); |
| 850 | SetSIR(iobase, ON); |
| 851 | CRC16(iobase, ON); |
| 852 | EnTXCRC(iobase, 0); |
| 853 | WriteReg(iobase, I_ST_CT_0, 0x00); |
| 854 | |
| 855 | spin_lock_irqsave(&self->lock, flags); |
| 856 | self->tx_buff.data = self->tx_buff.head; |
| 857 | self->tx_buff.len = |
| 858 | async_wrap_skb(skb, self->tx_buff.data, |
| 859 | self->tx_buff.truesize); |
| 860 | |
| 861 | self->stats.tx_bytes += self->tx_buff.len; |
| 862 | /* Send this frame with old speed */ |
| 863 | SetBaudRate(iobase, self->io.speed); |
| 864 | SetPulseWidth(iobase, 12); |
| 865 | SetSendPreambleCount(iobase, 0); |
| 866 | WriteReg(iobase, I_ST_CT_0, 0x80); |
| 867 | |
| 868 | EnableTX(iobase, ON); |
| 869 | EnableRX(iobase, OFF); |
| 870 | |
| 871 | ResetChip(iobase, 0); |
| 872 | ResetChip(iobase, 1); |
| 873 | ResetChip(iobase, 2); |
| 874 | ResetChip(iobase, 3); |
| 875 | ResetChip(iobase, 4); |
| 876 | |
| 877 | EnAllInt(iobase, ON); |
| 878 | EnTXDMA(iobase, ON); |
| 879 | EnRXDMA(iobase, OFF); |
| 880 | |
| 881 | irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len, |
| 882 | DMA_TX_MODE); |
| 883 | |
| 884 | SetSendByte(iobase, self->tx_buff.len); |
| 885 | RXStart(iobase, OFF); |
| 886 | TXStart(iobase, ON); |
| 887 | |
| 888 | dev->trans_start = jiffies; |
| 889 | spin_unlock_irqrestore(&self->lock, flags); |
| 890 | dev_kfree_skb(skb); |
| 891 | return 0; |
| 892 | } |
| 893 | |
| 894 | static int via_ircc_hard_xmit_fir(struct sk_buff *skb, |
| 895 | struct net_device *dev) |
| 896 | { |
| 897 | struct via_ircc_cb *self; |
| 898 | u16 iobase; |
| 899 | __u32 speed; |
| 900 | unsigned long flags; |
| 901 | |
| 902 | self = (struct via_ircc_cb *) dev->priv; |
| 903 | iobase = self->io.fir_base; |
| 904 | |
| 905 | if (self->st_fifo.len) |
| 906 | return 0; |
| 907 | if (self->chip_id == 0x3076) |
| 908 | iodelay(1500); |
| 909 | else |
| 910 | udelay(1500); |
| 911 | netif_stop_queue(dev); |
| 912 | speed = irda_get_next_speed(skb); |
| 913 | if ((speed != self->io.speed) && (speed != -1)) { |
| 914 | if (!skb->len) { |
| 915 | via_ircc_change_speed(self, speed); |
| 916 | dev->trans_start = jiffies; |
| 917 | dev_kfree_skb(skb); |
| 918 | return 0; |
| 919 | } else |
| 920 | self->new_speed = speed; |
| 921 | } |
| 922 | spin_lock_irqsave(&self->lock, flags); |
| 923 | self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail; |
| 924 | self->tx_fifo.queue[self->tx_fifo.free].len = skb->len; |
| 925 | |
| 926 | self->tx_fifo.tail += skb->len; |
| 927 | self->stats.tx_bytes += skb->len; |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 928 | skb_copy_from_linear_data(skb, |
| 929 | self->tx_fifo.queue[self->tx_fifo.free].start, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | self->tx_fifo.len++; |
| 931 | self->tx_fifo.free++; |
| 932 | //F01 if (self->tx_fifo.len == 1) { |
| 933 | via_ircc_dma_xmit(self, iobase); |
| 934 | //F01 } |
| 935 | //F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) netif_wake_queue(self->netdev); |
| 936 | dev->trans_start = jiffies; |
| 937 | dev_kfree_skb(skb); |
| 938 | spin_unlock_irqrestore(&self->lock, flags); |
| 939 | return 0; |
| 940 | |
| 941 | } |
| 942 | |
| 943 | static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase) |
| 944 | { |
| 945 | EnTXDMA(iobase, OFF); |
| 946 | self->io.direction = IO_XMIT; |
| 947 | EnPhys(iobase, ON); |
| 948 | EnableTX(iobase, ON); |
| 949 | EnableRX(iobase, OFF); |
| 950 | ResetChip(iobase, 0); |
| 951 | ResetChip(iobase, 1); |
| 952 | ResetChip(iobase, 2); |
| 953 | ResetChip(iobase, 3); |
| 954 | ResetChip(iobase, 4); |
| 955 | EnAllInt(iobase, ON); |
| 956 | EnTXDMA(iobase, ON); |
| 957 | EnRXDMA(iobase, OFF); |
| 958 | irda_setup_dma(self->io.dma, |
| 959 | ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start - |
| 960 | self->tx_buff.head) + self->tx_buff_dma, |
| 961 | self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE); |
| 962 | IRDA_DEBUG(1, "%s: tx_fifo.ptr=%x,len=%x,tx_fifo.len=%x..\n", |
| 963 | __FUNCTION__, self->tx_fifo.ptr, |
| 964 | self->tx_fifo.queue[self->tx_fifo.ptr].len, |
| 965 | self->tx_fifo.len); |
| 966 | |
| 967 | SetSendByte(iobase, self->tx_fifo.queue[self->tx_fifo.ptr].len); |
| 968 | RXStart(iobase, OFF); |
| 969 | TXStart(iobase, ON); |
| 970 | return 0; |
| 971 | |
| 972 | } |
| 973 | |
| 974 | /* |
| 975 | * Function via_ircc_dma_xmit_complete (self) |
| 976 | * |
| 977 | * The transfer of a frame in finished. This function will only be called |
| 978 | * by the interrupt handler |
| 979 | * |
| 980 | */ |
| 981 | static int via_ircc_dma_xmit_complete(struct via_ircc_cb *self) |
| 982 | { |
| 983 | int iobase; |
| 984 | int ret = TRUE; |
| 985 | u8 Tx_status; |
| 986 | |
| 987 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 988 | |
| 989 | iobase = self->io.fir_base; |
| 990 | /* Disable DMA */ |
| 991 | // DisableDmaChannel(self->io.dma); |
| 992 | /* Check for underrrun! */ |
| 993 | /* Clear bit, by writing 1 into it */ |
| 994 | Tx_status = GetTXStatus(iobase); |
| 995 | if (Tx_status & 0x08) { |
| 996 | self->stats.tx_errors++; |
| 997 | self->stats.tx_fifo_errors++; |
| 998 | hwreset(self); |
| 999 | // how to clear underrrun ? |
| 1000 | } else { |
| 1001 | self->stats.tx_packets++; |
| 1002 | ResetChip(iobase, 3); |
| 1003 | ResetChip(iobase, 4); |
| 1004 | } |
| 1005 | /* Check if we need to change the speed */ |
| 1006 | if (self->new_speed) { |
| 1007 | via_ircc_change_speed(self, self->new_speed); |
| 1008 | self->new_speed = 0; |
| 1009 | } |
| 1010 | |
| 1011 | /* Finished with this frame, so prepare for next */ |
| 1012 | if (IsFIROn(iobase)) { |
| 1013 | if (self->tx_fifo.len) { |
| 1014 | self->tx_fifo.len--; |
| 1015 | self->tx_fifo.ptr++; |
| 1016 | } |
| 1017 | } |
| 1018 | IRDA_DEBUG(1, |
| 1019 | "%s: tx_fifo.len=%x ,tx_fifo.ptr=%x,tx_fifo.free=%x...\n", |
| 1020 | __FUNCTION__, |
| 1021 | self->tx_fifo.len, self->tx_fifo.ptr, self->tx_fifo.free); |
| 1022 | /* F01_S |
| 1023 | // Any frames to be sent back-to-back? |
| 1024 | if (self->tx_fifo.len) { |
| 1025 | // Not finished yet! |
| 1026 | via_ircc_dma_xmit(self, iobase); |
| 1027 | ret = FALSE; |
| 1028 | } else { |
| 1029 | F01_E*/ |
| 1030 | // Reset Tx FIFO info |
| 1031 | self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; |
| 1032 | self->tx_fifo.tail = self->tx_buff.head; |
| 1033 | //F01 } |
| 1034 | |
| 1035 | // Make sure we have room for more frames |
| 1036 | //F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) { |
| 1037 | // Not busy transmitting anymore |
| 1038 | // Tell the network layer, that we can accept more frames |
| 1039 | netif_wake_queue(self->netdev); |
| 1040 | //F01 } |
| 1041 | return ret; |
| 1042 | } |
| 1043 | |
| 1044 | /* |
| 1045 | * Function via_ircc_dma_receive (self) |
| 1046 | * |
| 1047 | * Set configuration for receive a frame. |
| 1048 | * |
| 1049 | */ |
| 1050 | static int via_ircc_dma_receive(struct via_ircc_cb *self) |
| 1051 | { |
| 1052 | int iobase; |
| 1053 | |
| 1054 | iobase = self->io.fir_base; |
| 1055 | |
| 1056 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 1057 | |
| 1058 | self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; |
| 1059 | self->tx_fifo.tail = self->tx_buff.head; |
| 1060 | self->RxDataReady = 0; |
| 1061 | self->io.direction = IO_RECV; |
| 1062 | self->rx_buff.data = self->rx_buff.head; |
| 1063 | self->st_fifo.len = self->st_fifo.pending_bytes = 0; |
| 1064 | self->st_fifo.tail = self->st_fifo.head = 0; |
| 1065 | |
| 1066 | EnPhys(iobase, ON); |
| 1067 | EnableTX(iobase, OFF); |
| 1068 | EnableRX(iobase, ON); |
| 1069 | |
| 1070 | ResetChip(iobase, 0); |
| 1071 | ResetChip(iobase, 1); |
| 1072 | ResetChip(iobase, 2); |
| 1073 | ResetChip(iobase, 3); |
| 1074 | ResetChip(iobase, 4); |
| 1075 | |
| 1076 | EnAllInt(iobase, ON); |
| 1077 | EnTXDMA(iobase, OFF); |
| 1078 | EnRXDMA(iobase, ON); |
| 1079 | irda_setup_dma(self->io.dma2, self->rx_buff_dma, |
| 1080 | self->rx_buff.truesize, DMA_RX_MODE); |
| 1081 | TXStart(iobase, OFF); |
| 1082 | RXStart(iobase, ON); |
| 1083 | |
| 1084 | return 0; |
| 1085 | } |
| 1086 | |
| 1087 | /* |
| 1088 | * Function via_ircc_dma_receive_complete (self) |
| 1089 | * |
| 1090 | * Controller Finished with receiving frames, |
| 1091 | * and this routine is call by ISR |
| 1092 | * |
| 1093 | */ |
| 1094 | static int via_ircc_dma_receive_complete(struct via_ircc_cb *self, |
| 1095 | int iobase) |
| 1096 | { |
| 1097 | struct st_fifo *st_fifo; |
| 1098 | struct sk_buff *skb; |
| 1099 | int len, i; |
| 1100 | u8 status = 0; |
| 1101 | |
| 1102 | iobase = self->io.fir_base; |
| 1103 | st_fifo = &self->st_fifo; |
| 1104 | |
| 1105 | if (self->io.speed < 4000000) { //Speed below FIR |
| 1106 | len = GetRecvByte(iobase, self); |
| 1107 | skb = dev_alloc_skb(len + 1); |
| 1108 | if (skb == NULL) |
| 1109 | return FALSE; |
| 1110 | // Make sure IP header gets aligned |
| 1111 | skb_reserve(skb, 1); |
| 1112 | skb_put(skb, len - 2); |
| 1113 | if (self->chip_id == 0x3076) { |
| 1114 | for (i = 0; i < len - 2; i++) |
| 1115 | skb->data[i] = self->rx_buff.data[i * 2]; |
| 1116 | } else { |
| 1117 | if (self->chip_id == 0x3096) { |
| 1118 | for (i = 0; i < len - 2; i++) |
| 1119 | skb->data[i] = |
| 1120 | self->rx_buff.data[i]; |
| 1121 | } |
| 1122 | } |
| 1123 | // Move to next frame |
| 1124 | self->rx_buff.data += len; |
| 1125 | self->stats.rx_bytes += len; |
| 1126 | self->stats.rx_packets++; |
| 1127 | skb->dev = self->netdev; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 1128 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | skb->protocol = htons(ETH_P_IRDA); |
| 1130 | netif_rx(skb); |
| 1131 | return TRUE; |
| 1132 | } |
| 1133 | |
| 1134 | else { //FIR mode |
| 1135 | len = GetRecvByte(iobase, self); |
| 1136 | if (len == 0) |
| 1137 | return TRUE; //interrupt only, data maybe move by RxT |
| 1138 | if (((len - 4) < 2) || ((len - 4) > 2048)) { |
| 1139 | IRDA_DEBUG(1, "%s(): Trouble:len=%x,CurCount=%x,LastCount=%x..\n", |
| 1140 | __FUNCTION__, len, RxCurCount(iobase, self), |
| 1141 | self->RxLastCount); |
| 1142 | hwreset(self); |
| 1143 | return FALSE; |
| 1144 | } |
| 1145 | IRDA_DEBUG(2, "%s(): fifo.len=%x,len=%x,CurCount=%x..\n", |
| 1146 | __FUNCTION__, |
| 1147 | st_fifo->len, len - 4, RxCurCount(iobase, self)); |
| 1148 | |
| 1149 | st_fifo->entries[st_fifo->tail].status = status; |
| 1150 | st_fifo->entries[st_fifo->tail].len = len; |
| 1151 | st_fifo->pending_bytes += len; |
| 1152 | st_fifo->tail++; |
| 1153 | st_fifo->len++; |
| 1154 | if (st_fifo->tail > MAX_RX_WINDOW) |
| 1155 | st_fifo->tail = 0; |
| 1156 | self->RxDataReady = 0; |
| 1157 | |
| 1158 | // It maybe have MAX_RX_WINDOW package receive by |
| 1159 | // receive_complete before Timer IRQ |
| 1160 | /* F01_S |
| 1161 | if (st_fifo->len < (MAX_RX_WINDOW+2 )) { |
| 1162 | RXStart(iobase,ON); |
| 1163 | SetTimer(iobase,4); |
| 1164 | } |
| 1165 | else { |
| 1166 | F01_E */ |
| 1167 | EnableRX(iobase, OFF); |
| 1168 | EnRXDMA(iobase, OFF); |
| 1169 | RXStart(iobase, OFF); |
| 1170 | //F01_S |
| 1171 | // Put this entry back in fifo |
| 1172 | if (st_fifo->head > MAX_RX_WINDOW) |
| 1173 | st_fifo->head = 0; |
| 1174 | status = st_fifo->entries[st_fifo->head].status; |
| 1175 | len = st_fifo->entries[st_fifo->head].len; |
| 1176 | st_fifo->head++; |
| 1177 | st_fifo->len--; |
| 1178 | |
| 1179 | skb = dev_alloc_skb(len + 1 - 4); |
| 1180 | /* |
| 1181 | * if frame size,data ptr,or skb ptr are wrong ,the get next |
| 1182 | * entry. |
| 1183 | */ |
| 1184 | if ((skb == NULL) || (skb->data == NULL) |
| 1185 | || (self->rx_buff.data == NULL) || (len < 6)) { |
| 1186 | self->stats.rx_dropped++; |
| 1187 | return TRUE; |
| 1188 | } |
| 1189 | skb_reserve(skb, 1); |
| 1190 | skb_put(skb, len - 4); |
| 1191 | |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame^] | 1192 | skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | IRDA_DEBUG(2, "%s(): len=%x.rx_buff=%p\n", __FUNCTION__, |
| 1194 | len - 4, self->rx_buff.data); |
| 1195 | |
| 1196 | // Move to next frame |
| 1197 | self->rx_buff.data += len; |
| 1198 | self->stats.rx_bytes += len; |
| 1199 | self->stats.rx_packets++; |
| 1200 | skb->dev = self->netdev; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 1201 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | skb->protocol = htons(ETH_P_IRDA); |
| 1203 | netif_rx(skb); |
| 1204 | |
| 1205 | //F01_E |
| 1206 | } //FIR |
| 1207 | return TRUE; |
| 1208 | |
| 1209 | } |
| 1210 | |
| 1211 | /* |
| 1212 | * if frame is received , but no INT ,then use this routine to upload frame. |
| 1213 | */ |
| 1214 | static int upload_rxdata(struct via_ircc_cb *self, int iobase) |
| 1215 | { |
| 1216 | struct sk_buff *skb; |
| 1217 | int len; |
| 1218 | struct st_fifo *st_fifo; |
| 1219 | st_fifo = &self->st_fifo; |
| 1220 | |
| 1221 | len = GetRecvByte(iobase, self); |
| 1222 | |
| 1223 | IRDA_DEBUG(2, "%s(): len=%x\n", __FUNCTION__, len); |
| 1224 | |
Chuck Short | 83e331e | 2006-09-25 22:31:03 -0700 | [diff] [blame] | 1225 | if ((len - 4) < 2) { |
| 1226 | self->stats.rx_dropped++; |
| 1227 | return FALSE; |
| 1228 | } |
| 1229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | skb = dev_alloc_skb(len + 1); |
Chuck Short | 83e331e | 2006-09-25 22:31:03 -0700 | [diff] [blame] | 1231 | if (skb == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | self->stats.rx_dropped++; |
| 1233 | return FALSE; |
| 1234 | } |
| 1235 | skb_reserve(skb, 1); |
| 1236 | skb_put(skb, len - 4 + 1); |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame^] | 1237 | skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4 + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | st_fifo->tail++; |
| 1239 | st_fifo->len++; |
| 1240 | if (st_fifo->tail > MAX_RX_WINDOW) |
| 1241 | st_fifo->tail = 0; |
| 1242 | // Move to next frame |
| 1243 | self->rx_buff.data += len; |
| 1244 | self->stats.rx_bytes += len; |
| 1245 | self->stats.rx_packets++; |
| 1246 | skb->dev = self->netdev; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 1247 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | skb->protocol = htons(ETH_P_IRDA); |
| 1249 | netif_rx(skb); |
| 1250 | if (st_fifo->len < (MAX_RX_WINDOW + 2)) { |
| 1251 | RXStart(iobase, ON); |
| 1252 | } else { |
| 1253 | EnableRX(iobase, OFF); |
| 1254 | EnRXDMA(iobase, OFF); |
| 1255 | RXStart(iobase, OFF); |
| 1256 | } |
| 1257 | return TRUE; |
| 1258 | } |
| 1259 | |
| 1260 | /* |
| 1261 | * Implement back to back receive , use this routine to upload data. |
| 1262 | */ |
| 1263 | |
| 1264 | static int RxTimerHandler(struct via_ircc_cb *self, int iobase) |
| 1265 | { |
| 1266 | struct st_fifo *st_fifo; |
| 1267 | struct sk_buff *skb; |
| 1268 | int len; |
| 1269 | u8 status; |
| 1270 | |
| 1271 | st_fifo = &self->st_fifo; |
| 1272 | |
| 1273 | if (CkRxRecv(iobase, self)) { |
| 1274 | // if still receiving ,then return ,don't upload frame |
| 1275 | self->RetryCount = 0; |
| 1276 | SetTimer(iobase, 20); |
| 1277 | self->RxDataReady++; |
| 1278 | return FALSE; |
| 1279 | } else |
| 1280 | self->RetryCount++; |
| 1281 | |
| 1282 | if ((self->RetryCount >= 1) || |
| 1283 | ((st_fifo->pending_bytes + 2048) > self->rx_buff.truesize) |
| 1284 | || (st_fifo->len >= (MAX_RX_WINDOW))) { |
| 1285 | while (st_fifo->len > 0) { //upload frame |
| 1286 | // Put this entry back in fifo |
| 1287 | if (st_fifo->head > MAX_RX_WINDOW) |
| 1288 | st_fifo->head = 0; |
| 1289 | status = st_fifo->entries[st_fifo->head].status; |
| 1290 | len = st_fifo->entries[st_fifo->head].len; |
| 1291 | st_fifo->head++; |
| 1292 | st_fifo->len--; |
| 1293 | |
| 1294 | skb = dev_alloc_skb(len + 1 - 4); |
| 1295 | /* |
| 1296 | * if frame size, data ptr, or skb ptr are wrong, |
| 1297 | * then get next entry. |
| 1298 | */ |
| 1299 | if ((skb == NULL) || (skb->data == NULL) |
| 1300 | || (self->rx_buff.data == NULL) || (len < 6)) { |
| 1301 | self->stats.rx_dropped++; |
| 1302 | continue; |
| 1303 | } |
| 1304 | skb_reserve(skb, 1); |
| 1305 | skb_put(skb, len - 4); |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame^] | 1306 | skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | |
| 1308 | IRDA_DEBUG(2, "%s(): len=%x.head=%x\n", __FUNCTION__, |
| 1309 | len - 4, st_fifo->head); |
| 1310 | |
| 1311 | // Move to next frame |
| 1312 | self->rx_buff.data += len; |
| 1313 | self->stats.rx_bytes += len; |
| 1314 | self->stats.rx_packets++; |
| 1315 | skb->dev = self->netdev; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 1316 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | skb->protocol = htons(ETH_P_IRDA); |
| 1318 | netif_rx(skb); |
| 1319 | } //while |
| 1320 | self->RetryCount = 0; |
| 1321 | |
| 1322 | IRDA_DEBUG(2, |
| 1323 | "%s(): End of upload HostStatus=%x,RxStatus=%x\n", |
| 1324 | __FUNCTION__, |
| 1325 | GetHostStatus(iobase), GetRXStatus(iobase)); |
| 1326 | |
| 1327 | /* |
| 1328 | * if frame is receive complete at this routine ,then upload |
| 1329 | * frame. |
| 1330 | */ |
| 1331 | if ((GetRXStatus(iobase) & 0x10) |
| 1332 | && (RxCurCount(iobase, self) != self->RxLastCount)) { |
| 1333 | upload_rxdata(self, iobase); |
| 1334 | if (irda_device_txqueue_empty(self->netdev)) |
| 1335 | via_ircc_dma_receive(self); |
| 1336 | } |
| 1337 | } // timer detect complete |
| 1338 | else |
| 1339 | SetTimer(iobase, 4); |
| 1340 | return TRUE; |
| 1341 | |
| 1342 | } |
| 1343 | |
| 1344 | |
| 1345 | |
| 1346 | /* |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1347 | * Function via_ircc_interrupt (irq, dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | * |
| 1349 | * An interrupt from the chip has arrived. Time to do some work |
| 1350 | * |
| 1351 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1352 | static irqreturn_t via_ircc_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | { |
| 1354 | struct net_device *dev = (struct net_device *) dev_id; |
| 1355 | struct via_ircc_cb *self; |
| 1356 | int iobase; |
| 1357 | u8 iHostIntType, iRxIntType, iTxIntType; |
| 1358 | |
| 1359 | if (!dev) { |
| 1360 | IRDA_WARNING("%s: irq %d for unknown device.\n", driver_name, |
| 1361 | irq); |
| 1362 | return IRQ_NONE; |
| 1363 | } |
| 1364 | self = (struct via_ircc_cb *) dev->priv; |
| 1365 | iobase = self->io.fir_base; |
| 1366 | spin_lock(&self->lock); |
| 1367 | iHostIntType = GetHostStatus(iobase); |
| 1368 | |
| 1369 | IRDA_DEBUG(4, "%s(): iHostIntType %02x: %s %s %s %02x\n", |
| 1370 | __FUNCTION__, iHostIntType, |
| 1371 | (iHostIntType & 0x40) ? "Timer" : "", |
| 1372 | (iHostIntType & 0x20) ? "Tx" : "", |
| 1373 | (iHostIntType & 0x10) ? "Rx" : "", |
| 1374 | (iHostIntType & 0x0e) >> 1); |
| 1375 | |
| 1376 | if ((iHostIntType & 0x40) != 0) { //Timer Event |
| 1377 | self->EventFlag.TimeOut++; |
| 1378 | ClearTimerInt(iobase, 1); |
| 1379 | if (self->io.direction == IO_XMIT) { |
| 1380 | via_ircc_dma_xmit(self, iobase); |
| 1381 | } |
| 1382 | if (self->io.direction == IO_RECV) { |
| 1383 | /* |
| 1384 | * frame ready hold too long, must reset. |
| 1385 | */ |
| 1386 | if (self->RxDataReady > 30) { |
| 1387 | hwreset(self); |
| 1388 | if (irda_device_txqueue_empty(self->netdev)) { |
| 1389 | via_ircc_dma_receive(self); |
| 1390 | } |
| 1391 | } else { // call this to upload frame. |
| 1392 | RxTimerHandler(self, iobase); |
| 1393 | } |
| 1394 | } //RECV |
| 1395 | } //Timer Event |
| 1396 | if ((iHostIntType & 0x20) != 0) { //Tx Event |
| 1397 | iTxIntType = GetTXStatus(iobase); |
| 1398 | |
| 1399 | IRDA_DEBUG(4, "%s(): iTxIntType %02x: %s %s %s %s\n", |
| 1400 | __FUNCTION__, iTxIntType, |
| 1401 | (iTxIntType & 0x08) ? "FIFO underr." : "", |
| 1402 | (iTxIntType & 0x04) ? "EOM" : "", |
| 1403 | (iTxIntType & 0x02) ? "FIFO ready" : "", |
| 1404 | (iTxIntType & 0x01) ? "Early EOM" : ""); |
| 1405 | |
| 1406 | if (iTxIntType & 0x4) { |
| 1407 | self->EventFlag.EOMessage++; // read and will auto clean |
| 1408 | if (via_ircc_dma_xmit_complete(self)) { |
| 1409 | if (irda_device_txqueue_empty |
| 1410 | (self->netdev)) { |
| 1411 | via_ircc_dma_receive(self); |
| 1412 | } |
| 1413 | } else { |
| 1414 | self->EventFlag.Unknown++; |
| 1415 | } |
| 1416 | } //EOP |
| 1417 | } //Tx Event |
| 1418 | //---------------------------------------- |
| 1419 | if ((iHostIntType & 0x10) != 0) { //Rx Event |
| 1420 | /* Check if DMA has finished */ |
| 1421 | iRxIntType = GetRXStatus(iobase); |
| 1422 | |
| 1423 | IRDA_DEBUG(4, "%s(): iRxIntType %02x: %s %s %s %s %s %s %s\n", |
| 1424 | __FUNCTION__, iRxIntType, |
| 1425 | (iRxIntType & 0x80) ? "PHY err." : "", |
| 1426 | (iRxIntType & 0x40) ? "CRC err" : "", |
| 1427 | (iRxIntType & 0x20) ? "FIFO overr." : "", |
| 1428 | (iRxIntType & 0x10) ? "EOF" : "", |
| 1429 | (iRxIntType & 0x08) ? "RxData" : "", |
| 1430 | (iRxIntType & 0x02) ? "RxMaxLen" : "", |
| 1431 | (iRxIntType & 0x01) ? "SIR bad" : ""); |
| 1432 | if (!iRxIntType) |
| 1433 | IRDA_DEBUG(3, "%s(): RxIRQ =0\n", __FUNCTION__); |
| 1434 | |
| 1435 | if (iRxIntType & 0x10) { |
| 1436 | if (via_ircc_dma_receive_complete(self, iobase)) { |
| 1437 | //F01 if(!(IsFIROn(iobase))) via_ircc_dma_receive(self); |
| 1438 | via_ircc_dma_receive(self); |
| 1439 | } |
| 1440 | } // No ERR |
| 1441 | else { //ERR |
| 1442 | IRDA_DEBUG(4, "%s(): RxIRQ ERR:iRxIntType=%x,HostIntType=%x,CurCount=%x,RxLastCount=%x_____\n", |
| 1443 | __FUNCTION__, iRxIntType, iHostIntType, |
| 1444 | RxCurCount(iobase, self), |
| 1445 | self->RxLastCount); |
| 1446 | |
| 1447 | if (iRxIntType & 0x20) { //FIFO OverRun ERR |
| 1448 | ResetChip(iobase, 0); |
| 1449 | ResetChip(iobase, 1); |
| 1450 | } else { //PHY,CRC ERR |
| 1451 | |
| 1452 | if (iRxIntType != 0x08) |
| 1453 | hwreset(self); //F01 |
| 1454 | } |
| 1455 | via_ircc_dma_receive(self); |
| 1456 | } //ERR |
| 1457 | |
| 1458 | } //Rx Event |
| 1459 | spin_unlock(&self->lock); |
| 1460 | return IRQ_RETVAL(iHostIntType); |
| 1461 | } |
| 1462 | |
| 1463 | static void hwreset(struct via_ircc_cb *self) |
| 1464 | { |
| 1465 | int iobase; |
| 1466 | iobase = self->io.fir_base; |
| 1467 | |
| 1468 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 1469 | |
| 1470 | ResetChip(iobase, 5); |
| 1471 | EnableDMA(iobase, OFF); |
| 1472 | EnableTX(iobase, OFF); |
| 1473 | EnableRX(iobase, OFF); |
| 1474 | EnRXDMA(iobase, OFF); |
| 1475 | EnTXDMA(iobase, OFF); |
| 1476 | RXStart(iobase, OFF); |
| 1477 | TXStart(iobase, OFF); |
| 1478 | InitCard(iobase); |
| 1479 | CommonInit(iobase); |
| 1480 | SIRFilter(iobase, ON); |
| 1481 | SetSIR(iobase, ON); |
| 1482 | CRC16(iobase, ON); |
| 1483 | EnTXCRC(iobase, 0); |
| 1484 | WriteReg(iobase, I_ST_CT_0, 0x00); |
| 1485 | SetBaudRate(iobase, 9600); |
| 1486 | SetPulseWidth(iobase, 12); |
| 1487 | SetSendPreambleCount(iobase, 0); |
| 1488 | WriteReg(iobase, I_ST_CT_0, 0x80); |
| 1489 | |
| 1490 | /* Restore speed. */ |
| 1491 | via_ircc_change_speed(self, self->io.speed); |
| 1492 | |
| 1493 | self->st_fifo.len = 0; |
| 1494 | } |
| 1495 | |
| 1496 | /* |
| 1497 | * Function via_ircc_is_receiving (self) |
| 1498 | * |
| 1499 | * Return TRUE is we are currently receiving a frame |
| 1500 | * |
| 1501 | */ |
| 1502 | static int via_ircc_is_receiving(struct via_ircc_cb *self) |
| 1503 | { |
| 1504 | int status = FALSE; |
| 1505 | int iobase; |
| 1506 | |
| 1507 | IRDA_ASSERT(self != NULL, return FALSE;); |
| 1508 | |
| 1509 | iobase = self->io.fir_base; |
| 1510 | if (CkRxRecv(iobase, self)) |
| 1511 | status = TRUE; |
| 1512 | |
| 1513 | IRDA_DEBUG(2, "%s(): status=%x....\n", __FUNCTION__, status); |
| 1514 | |
| 1515 | return status; |
| 1516 | } |
| 1517 | |
| 1518 | |
| 1519 | /* |
| 1520 | * Function via_ircc_net_open (dev) |
| 1521 | * |
| 1522 | * Start the device |
| 1523 | * |
| 1524 | */ |
| 1525 | static int via_ircc_net_open(struct net_device *dev) |
| 1526 | { |
| 1527 | struct via_ircc_cb *self; |
| 1528 | int iobase; |
| 1529 | char hwname[32]; |
| 1530 | |
| 1531 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 1532 | |
| 1533 | IRDA_ASSERT(dev != NULL, return -1;); |
| 1534 | self = (struct via_ircc_cb *) dev->priv; |
| 1535 | self->stats.rx_packets = 0; |
| 1536 | IRDA_ASSERT(self != NULL, return 0;); |
| 1537 | iobase = self->io.fir_base; |
| 1538 | if (request_irq(self->io.irq, via_ircc_interrupt, 0, dev->name, dev)) { |
| 1539 | IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name, |
| 1540 | self->io.irq); |
| 1541 | return -EAGAIN; |
| 1542 | } |
| 1543 | /* |
| 1544 | * Always allocate the DMA channel after the IRQ, and clean up on |
| 1545 | * failure. |
| 1546 | */ |
| 1547 | if (request_dma(self->io.dma, dev->name)) { |
| 1548 | IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name, |
| 1549 | self->io.dma); |
| 1550 | free_irq(self->io.irq, self); |
| 1551 | return -EAGAIN; |
| 1552 | } |
| 1553 | if (self->io.dma2 != self->io.dma) { |
| 1554 | if (request_dma(self->io.dma2, dev->name)) { |
| 1555 | IRDA_WARNING("%s, unable to allocate dma2=%d\n", |
| 1556 | driver_name, self->io.dma2); |
| 1557 | free_irq(self->io.irq, self); |
| 1558 | return -EAGAIN; |
| 1559 | } |
| 1560 | } |
| 1561 | |
| 1562 | |
| 1563 | /* turn on interrupts */ |
| 1564 | EnAllInt(iobase, ON); |
| 1565 | EnInternalLoop(iobase, OFF); |
| 1566 | EnExternalLoop(iobase, OFF); |
| 1567 | |
| 1568 | /* */ |
| 1569 | via_ircc_dma_receive(self); |
| 1570 | |
| 1571 | /* Ready to play! */ |
| 1572 | netif_start_queue(dev); |
| 1573 | |
| 1574 | /* |
| 1575 | * Open new IrLAP layer instance, now that everything should be |
| 1576 | * initialized properly |
| 1577 | */ |
| 1578 | sprintf(hwname, "VIA @ 0x%x", iobase); |
| 1579 | self->irlap = irlap_open(dev, &self->qos, hwname); |
| 1580 | |
| 1581 | self->RxLastCount = 0; |
| 1582 | |
| 1583 | return 0; |
| 1584 | } |
| 1585 | |
| 1586 | /* |
| 1587 | * Function via_ircc_net_close (dev) |
| 1588 | * |
| 1589 | * Stop the device |
| 1590 | * |
| 1591 | */ |
| 1592 | static int via_ircc_net_close(struct net_device *dev) |
| 1593 | { |
| 1594 | struct via_ircc_cb *self; |
| 1595 | int iobase; |
| 1596 | |
| 1597 | IRDA_DEBUG(3, "%s()\n", __FUNCTION__); |
| 1598 | |
| 1599 | IRDA_ASSERT(dev != NULL, return -1;); |
| 1600 | self = (struct via_ircc_cb *) dev->priv; |
| 1601 | IRDA_ASSERT(self != NULL, return 0;); |
| 1602 | |
| 1603 | /* Stop device */ |
| 1604 | netif_stop_queue(dev); |
| 1605 | /* Stop and remove instance of IrLAP */ |
| 1606 | if (self->irlap) |
| 1607 | irlap_close(self->irlap); |
| 1608 | self->irlap = NULL; |
| 1609 | iobase = self->io.fir_base; |
| 1610 | EnTXDMA(iobase, OFF); |
| 1611 | EnRXDMA(iobase, OFF); |
| 1612 | DisableDmaChannel(self->io.dma); |
| 1613 | |
| 1614 | /* Disable interrupts */ |
| 1615 | EnAllInt(iobase, OFF); |
| 1616 | free_irq(self->io.irq, dev); |
| 1617 | free_dma(self->io.dma); |
| 1618 | |
| 1619 | return 0; |
| 1620 | } |
| 1621 | |
| 1622 | /* |
| 1623 | * Function via_ircc_net_ioctl (dev, rq, cmd) |
| 1624 | * |
| 1625 | * Process IOCTL commands for this device |
| 1626 | * |
| 1627 | */ |
| 1628 | static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, |
| 1629 | int cmd) |
| 1630 | { |
| 1631 | struct if_irda_req *irq = (struct if_irda_req *) rq; |
| 1632 | struct via_ircc_cb *self; |
| 1633 | unsigned long flags; |
| 1634 | int ret = 0; |
| 1635 | |
| 1636 | IRDA_ASSERT(dev != NULL, return -1;); |
| 1637 | self = dev->priv; |
| 1638 | IRDA_ASSERT(self != NULL, return -1;); |
| 1639 | IRDA_DEBUG(1, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, |
| 1640 | cmd); |
| 1641 | /* Disable interrupts & save flags */ |
| 1642 | spin_lock_irqsave(&self->lock, flags); |
| 1643 | switch (cmd) { |
| 1644 | case SIOCSBANDWIDTH: /* Set bandwidth */ |
| 1645 | if (!capable(CAP_NET_ADMIN)) { |
| 1646 | ret = -EPERM; |
| 1647 | goto out; |
| 1648 | } |
| 1649 | via_ircc_change_speed(self, irq->ifr_baudrate); |
| 1650 | break; |
| 1651 | case SIOCSMEDIABUSY: /* Set media busy */ |
| 1652 | if (!capable(CAP_NET_ADMIN)) { |
| 1653 | ret = -EPERM; |
| 1654 | goto out; |
| 1655 | } |
| 1656 | irda_device_set_media_busy(self->netdev, TRUE); |
| 1657 | break; |
| 1658 | case SIOCGRECEIVING: /* Check if we are receiving right now */ |
| 1659 | irq->ifr_receiving = via_ircc_is_receiving(self); |
| 1660 | break; |
| 1661 | default: |
| 1662 | ret = -EOPNOTSUPP; |
| 1663 | } |
| 1664 | out: |
| 1665 | spin_unlock_irqrestore(&self->lock, flags); |
| 1666 | return ret; |
| 1667 | } |
| 1668 | |
| 1669 | static struct net_device_stats *via_ircc_net_get_stats(struct net_device |
| 1670 | *dev) |
| 1671 | { |
| 1672 | struct via_ircc_cb *self = (struct via_ircc_cb *) dev->priv; |
| 1673 | |
| 1674 | return &self->stats; |
| 1675 | } |
| 1676 | |
| 1677 | MODULE_AUTHOR("VIA Technologies,inc"); |
| 1678 | MODULE_DESCRIPTION("VIA IrDA Device Driver"); |
| 1679 | MODULE_LICENSE("GPL"); |
| 1680 | |
| 1681 | module_init(via_ircc_init); |
| 1682 | module_exit(via_ircc_cleanup); |