/******************************************************************** Filename: via-ircc.c Version: 1.0 Description: Driver for the VIA VT8231/VT8233 IrDA chipsets Author: VIA Technologies,inc Date : 08/06/2003 Copyright (c) 1998-2003 VIA Technologies, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. F01 Oct/02/02: Modify code for V0.11(move out back to back transfer) F02 Oct/28/02: Add SB device ID for 3147 and 3177. Comment : jul/09/2002 : only implement two kind of dongle currently. Oct/02/2002 : work on VT8231 and VT8233 . Aug/06/2003 : change driver format to pci driver . 2004-02-16: <sda@bdit.de> - Removed unneeded 'legacy' pci stuff. - Make sure SIR mode is set (hw_init()) before calling mode-dependent stuff. - On speed change from core, don't send SIR frame with new speed. Use current speed and change speeds later. - Make module-param dongle_id actually work. - New dongle_id 17 (0x11): TDFS4500. Single-ended SIR only. Tested with home-grown PCB on EPIA boards. - Code cleanup. ********************************************************************/ #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/skbuff.h> #include <linux/netdevice.h> #include <linux/ioport.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/rtnetlink.h> #include <linux/pci.h> #include <linux/dma-mapping.h> #include <linux/gfp.h> #include <asm/io.h> #include <asm/dma.h> #include <asm/byteorder.h> #include <linux/pm.h> #include <net/irda/wrapper.h> #include <net/irda/irda.h> #include <net/irda/irda_device.h> #include "via-ircc.h" #define VIA_MODULE_NAME "via-ircc" #define CHIP_IO_EXTENT 0x40 static char *driver_name = VIA_MODULE_NAME; /* Module parameters */ static int qos_mtt_bits = 0x07; /* 1 ms or more */ static int dongle_id = 0; /* default: probe */ /* We can't guess the type of connected dongle, user *must* supply it. */ module_param(dongle_id, int, 0); /* Some prototypes */ static int via_ircc_open(struct pci_dev *pdev, chipio_t * info, unsigned int id); static int via_ircc_dma_receive(struct via_ircc_cb *self); static int via_ircc_dma_receive_complete(struct via_ircc_cb *self, int iobase); static netdev_tx_t via_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev); static netdev_tx_t via_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev); static void via_hw_init(struct via_ircc_cb *self); static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 baud); static irqreturn_t via_ircc_interrupt(int irq, void *dev_id); static int via_ircc_is_receiving(struct via_ircc_cb *self); static int via_ircc_read_dongle_id(int iobase); static int via_ircc_net_open(struct net_device *dev); static int via_ircc_net_close(struct net_device *dev); static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); static void via_ircc_change_dongle_speed(int iobase, int speed, int dongle_id); static int RxTimerHandler(struct via_ircc_cb *self, int iobase); static void hwreset(struct via_ircc_cb *self); static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase); static int upload_rxdata(struct via_ircc_cb *self, int iobase); static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id); static void __devexit via_remove_one (struct pci_dev *pdev); /* FIXME : Should use udelay() instead, even if we are x86 only - Jean II */ static void iodelay(int udelay) { u8 data; int i; for (i = 0; i < udelay; i++) { data = inb(0x80); } } static DEFINE_PCI_DEVICE_TABLE(via_pci_tbl) = { { PCI_VENDOR_ID_VIA, 0x8231, PCI_ANY_ID, PCI_ANY_ID,0,0,0 }, { PCI_VENDOR_ID_VIA, 0x3109, PCI_ANY_ID, PCI_ANY_ID,0,0,1 }, { PCI_VENDOR_ID_VIA, 0x3074, PCI_ANY_ID, PCI_ANY_ID,0,0,2 }, { PCI_VENDOR_ID_VIA, 0x3147, PCI_ANY_ID, PCI_ANY_ID,0,0,3 }, { PCI_VENDOR_ID_VIA, 0x3177, PCI_ANY_ID, PCI_ANY_ID,0,0,4 }, { 0, } }; MODULE_DEVICE_TABLE(pci,via_pci_tbl); static struct pci_driver via_driver = { .name = VIA_MODULE_NAME, .id_table = via_pci_tbl, .probe = via_init_one, .remove = __devexit_p(via_remove_one), }; /* * Function via_ircc_init () * * Initialize chip. Just find out chip type and resource. */ static int __init via_ircc_init(void) { int rc; IRDA_DEBUG(3, "%s()\n", __func__); rc = pci_register_driver(&via_driver); if (rc < 0) { IRDA_DEBUG(0, "%s(): error rc = %d, returning -ENODEV...\n", __func__, rc); return -ENODEV; } return 0; } static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id) { int rc; u8 temp,oldPCI_40,oldPCI_44,bTmp,bTmp1; u16 Chipset,FirDRQ1,FirDRQ0,FirIRQ,FirIOBase; chipio_t info; IRDA_DEBUG(2, "%s(): Device ID=(0X%X)\n", __func__, id->device); rc = pci_enable_device (pcidev); if (rc) { IRDA_DEBUG(0, "%s(): error rc = %d\n", __func__, rc); return -ENODEV; } // South Bridge exist if ( ReadLPCReg(0x20) != 0x3C ) Chipset=0x3096; else Chipset=0x3076; if (Chipset==0x3076) { IRDA_DEBUG(2, "%s(): Chipset = 3076\n", __func__); WriteLPCReg(7,0x0c ); temp=ReadLPCReg(0x30);//check if BIOS Enable Fir if((temp&0x01)==1) { // BIOS close or no FIR WriteLPCReg(0x1d, 0x82 ); WriteLPCReg(0x23,0x18); temp=ReadLPCReg(0xF0); if((temp&0x01)==0) { temp=(ReadLPCReg(0x74)&0x03); //DMA FirDRQ0=temp + 4; temp=(ReadLPCReg(0x74)&0x0C) >> 2; FirDRQ1=temp + 4; } else { temp=(ReadLPCReg(0x74)&0x0C) >> 2; //DMA FirDRQ0=temp + 4; FirDRQ1=FirDRQ0; } FirIRQ=(ReadLPCReg(0x70)&0x0f); //IRQ FirIOBase=ReadLPCReg(0x60 ) << 8; //IO Space :high byte FirIOBase=FirIOBase| ReadLPCReg(0x61) ; //low byte FirIOBase=FirIOBase ; info.fir_base=FirIOBase; info.irq=FirIRQ; info.dma=FirDRQ1; info.dma2=FirDRQ0; pci_read_config_byte(pcidev,0x40,&bTmp); pci_write_config_byte(pcidev,0x40,((bTmp | 0x08) & 0xfe)); pci_read_config_byte(pcidev,0x42,&bTmp); pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0)); pci_write_config_byte(pcidev,0x5a,0xc0); WriteLPCReg(0x28, 0x70 ); if (via_ircc_open(pcidev, &info, 0x3076) == 0) rc=0; } else rc = -ENODEV; //IR not turn on } else { //Not VT1211 IRDA_DEBUG(2, "%s(): Chipset = 3096\n", __func__); pci_read_config_byte(pcidev,0x67,&bTmp);//check if BIOS Enable Fir if((bTmp&0x01)==1) { // BIOS enable FIR //Enable Double DMA clock pci_read_config_byte(pcidev,0x42,&oldPCI_40); pci_write_config_byte(pcidev,0x42,oldPCI_40 | 0x80); pci_read_config_byte(pcidev,0x40,&oldPCI_40); pci_write_config_byte(pcidev,0x40,oldPCI_40 & 0xf7); pci_read_config_byte(pcidev,0x44,&oldPCI_44); pci_write_config_byte(pcidev,0x44,0x4e); //---------- read configuration from Function0 of south bridge if((bTmp&0x02)==0) { pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA FirDRQ0 = (bTmp1 & 0x30) >> 4; pci_read_config_byte(pcidev,0x44,&bTmp1); FirDRQ1 = (bTmp1 & 0xc0) >> 6; } else { pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA FirDRQ0 = (bTmp1 & 0x30) >> 4 ; FirDRQ1=0; } pci_read_config_byte(pcidev,0x47,&bTmp1); //IRQ FirIRQ = bTmp1 & 0x0f; pci_read_config_byte(pcidev,0x69,&bTmp); FirIOBase = bTmp << 8;//hight byte pci_read_config_byte(pcidev,0x68,&bTmp); FirIOBase = (FirIOBase | bTmp ) & 0xfff0; //------------------------- info.fir_base=FirIOBase; info.irq=FirIRQ; info.dma=FirDRQ1; info.dma2=FirDRQ0; if (via_ircc_open(pcidev, &info, 0x3096) == 0) rc=0; } else rc = -ENODEV; //IR not turn on !!!!! }//Not VT1211 IRDA_DEBUG(2, "%s(): End - rc = %d\n", __func__, rc); return rc; } static void __exit via_ircc_cleanup(void) { IRDA_DEBUG(3, "%s()\n", __func__); /* Cleanup all instances of the driver */ pci_unregister_driver (&via_driver); } static const struct net_device_ops via_ircc_sir_ops = { .ndo_start_xmit = via_ircc_hard_xmit_sir, .ndo_open = via_ircc_net_open, .ndo_stop = via_ircc_net_close, .ndo_do_ioctl = via_ircc_net_ioctl, }; static const struct net_device_ops via_ircc_fir_ops = { .ndo_start_xmit = via_ircc_hard_xmit_fir, .ndo_open = via_ircc_net_open, .ndo_stop = via_ircc_net_close, .ndo_do_ioctl = via_ircc_net_ioctl, }; /* * Function via_ircc_open(pdev, iobase, irq) * * Open driver instance * */ static __devinit int via_ircc_open(struct pci_dev *pdev, chipio_t * info, unsigned int id) { struct net_device *dev; struct via_ircc_cb *self; int err; IRDA_DEBUG(3, "%s()\n", __func__); /* Allocate new instance of the driver */ dev = alloc_irdadev(sizeof(struct via_ircc_cb)); if (dev == NULL) return -ENOMEM; self = netdev_priv(dev); self->netdev = dev; spin_lock_init(&self->lock); pci_set_drvdata(pdev, self); /* Initialize Resource */ self->io.cfg_base = info->cfg_base; self->io.fir_base = info->fir_base; self->io.irq = info->irq; self->io.fir_ext = CHIP_IO_EXTENT; self->io.dma = info->dma; self->io.dma2 = info->dma2; self->io.fifo_size = 32; self->chip_id = id; self->st_fifo.len = 0; self->RxDataReady = 0; /* Reserve the ioports that we need */ if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) { IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n", __func__, self->io.fir_base); err = -ENODEV; goto err_out1; } /* Initialize QoS for this device */ irda_init_max_qos_capabilies(&self->qos); /* Check if user has supplied the dongle id or not */ if (!dongle_id) dongle_id = via_ircc_read_dongle_id(self->io.fir_base); self->io.dongle_id = dongle_id; /* The only value we must override it the baudrate */ /* Maximum speeds and capabilities are dongle-dependent. */ switch( self->io.dongle_id ){ case 0x0d: self->qos.baud_rate.bits = IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 | IR_576000 | IR_1152000 | (IR_4000000 << 8); break; default: self->qos.baud_rate.bits = IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200; break; } /* Following was used for testing: * * self->qos.baud_rate.bits = IR_9600; * * Is is no good, as it prohibits (error-prone) speed-changes. */ self->qos.min_turn_time.bits = qos_mtt_bits; irda_qos_bits_to_value(&self->qos); /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */ self->rx_buff.truesize = 14384 + 2048; self->tx_buff.truesize = 14384 + 2048; /* Allocate memory if needed */ self->rx_buff.head = dma_alloc_coherent(&pdev->dev, self->rx_buff.truesize, &self->rx_buff_dma, GFP_KERNEL); if (self->rx_buff.head == NULL) { err = -ENOMEM; goto err_out2; } memset(self->rx_buff.head, 0, self->rx_buff.truesize); self->tx_buff.head = dma_alloc_coherent(&pdev->dev, self->tx_buff.truesize, &self->tx_buff_dma, GFP_KERNEL); if (self->tx_buff.head == NULL) { err = -ENOMEM; goto err_out3; } memset(self->tx_buff.head, 0, self->tx_buff.truesize); self->rx_buff.in_frame = FALSE; self->rx_buff.state = OUTSIDE_FRAME; self->tx_buff.data = self->tx_buff.head; self->rx_buff.data = self->rx_buff.head; /* Reset Tx queue info */ self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; self->tx_fifo.tail = self->tx_buff.head; /* Override the network functions we need to use */ dev->netdev_ops = &via_ircc_sir_ops; err = register_netdev(dev); if (err) goto err_out4; IRDA_MESSAGE("IrDA: Registered device %s (via-ircc)\n", dev->name); /* Initialise the hardware.. */ self->io.speed = 9600; via_hw_init(self); return 0; err_out4: dma_free_coherent(&pdev->dev, self->tx_buff.truesize, self->tx_buff.head, self->tx_buff_dma); err_out3: dma_free_coherent(&pdev->dev, self->rx_buff.truesize, self->rx_buff.head, self->rx_buff_dma); err_out2: release_region(self->io.fir_base, self->io.fir_ext); err_out1: pci_set_drvdata(pdev, NULL); free_netdev(dev); return err; } /* * Function via_remove_one(pdev) * * Close driver instance * */ static void __devexit via_remove_one(struct pci_dev *pdev) { struct via_ircc_cb *self = pci_get_drvdata(pdev); int iobase; IRDA_DEBUG(3, "%s()\n", __func__); iobase = self->io.fir_base; ResetChip(iobase, 5); //hardware reset. /* Remove netdevice */ unregister_netdev(self->netdev); /* Release the PORT that this driver is using */ IRDA_DEBUG(2, "%s(), Releasing Region %03x\n", __func__, self->io.fir_base); release_region(self->io.fir_base, self->io.fir_ext); if (self->tx_buff.head) dma_free_coherent(&pdev->dev, self->tx_buff.truesize, self->tx_buff.head, self->tx_buff_dma); if (self->rx_buff.head) dma_free_coherent(&pdev->dev, self->rx_buff.truesize, self->rx_buff.head, self->rx_buff_dma); pci_set_drvdata(pdev, NULL); free_netdev(self->netdev); pci_disable_device(pdev); } /* * Function via_hw_init(self) * * Returns non-negative on success. * * Formerly via_ircc_setup */ static void via_hw_init(struct via_ircc_cb *self) { int iobase = self->io.fir_base; IRDA_DEBUG(3, "%s()\n", __func__); SetMaxRxPacketSize(iobase, 0x0fff); //set to max:4095 // FIFO Init EnRXFIFOReadyInt(iobase, OFF); EnRXFIFOHalfLevelInt(iobase, OFF); EnTXFIFOHalfLevelInt(iobase, OFF); EnTXFIFOUnderrunEOMInt(iobase, ON); EnTXFIFOReadyInt(iobase, OFF); InvertTX(iobase, OFF); InvertRX(iobase, OFF); if (ReadLPCReg(0x20) == 0x3c) WriteLPCReg(0xF0, 0); // for VT1211 /* Int Init */ EnRXSpecInt(iobase, ON); /* The following is basically hwreset */ /* If this is the case, why not just call hwreset() ? Jean II */ ResetChip(iobase, 5); EnableDMA(iobase, OFF); EnableTX(iobase, OFF); EnableRX(iobase, OFF); EnRXDMA(iobase, OFF); EnTXDMA(iobase, OFF); RXStart(iobase, OFF); TXStart(iobase, OFF); InitCard(iobase); CommonInit(iobase); SIRFilter(iobase, ON); SetSIR(iobase, ON); CRC16(iobase, ON); EnTXCRC(iobase, 0); WriteReg(iobase, I_ST_CT_0, 0x00); SetBaudRate(iobase, 9600); SetPulseWidth(iobase, 12); SetSendPreambleCount(iobase, 0); self->io.speed = 9600; self->st_fifo.len = 0; via_ircc_change_dongle_speed(iobase, self->io.speed, self->io.dongle_id); WriteReg(iobase, I_ST_CT_0, 0x80); } /* * Function via_ircc_read_dongle_id (void) * */ static int via_ircc_read_dongle_id(int iobase) { int dongle_id = 9; /* Default to IBM */ IRDA_ERROR("via-ircc: dongle probing not supported, please specify dongle_id module parameter.\n"); return dongle_id; } /* * Function via_ircc_change_dongle_speed (iobase, speed, dongle_id) * Change speed of the attach dongle * only implement two type of dongle currently. */ static void via_ircc_change_dongle_speed(int iobase, int speed, int dongle_id) { u8 mode = 0; /* speed is unused, as we use IsSIROn()/IsMIROn() */ speed = speed; IRDA_DEBUG(1, "%s(): change_dongle_speed to %d for 0x%x, %d\n", __func__, speed, iobase, dongle_id); switch (dongle_id) { /* Note: The dongle_id's listed here are derived from * nsc-ircc.c */ case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */ UseOneRX(iobase, ON); // use one RX pin RX1,RX2 InvertTX(iobase, OFF); InvertRX(iobase, OFF); EnRX2(iobase, ON); //sir to rx2 EnGPIOtoRX2(iobase, OFF); if (IsSIROn(iobase)) { //sir // Mode select Off SlowIRRXLowActive(iobase, ON); udelay(1000); SlowIRRXLowActive(iobase, OFF); } else { if (IsMIROn(iobase)) { //mir // Mode select On SlowIRRXLowActive(iobase, OFF); udelay(20); } else { // fir if (IsFIROn(iobase)) { //fir // Mode select On SlowIRRXLowActive(iobase, OFF); udelay(20); } } } break; case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */ UseOneRX(iobase, ON); //use ONE RX....RX1 InvertTX(iobase, OFF); InvertRX(iobase, OFF); // invert RX pin EnRX2(iobase, ON); EnGPIOtoRX2(iobase, OFF); if (IsSIROn(iobase)) { //sir // Mode select On SlowIRRXLowActive(iobase, ON); udelay(20); // Mode select Off SlowIRRXLowActive(iobase, OFF); } if (IsMIROn(iobase)) { //mir // Mode select On SlowIRRXLowActive(iobase, OFF); udelay(20); // Mode select Off SlowIRRXLowActive(iobase, ON); } else { // fir if (IsFIROn(iobase)) { //fir // Mode select On SlowIRRXLowActive(iobase, OFF); // TX On WriteTX(iobase, ON); udelay(20); // Mode select OFF SlowIRRXLowActive(iobase, ON); udelay(20); // TX Off WriteTX(iobase, OFF); } } break; case 0x0d: UseOneRX(iobase, OFF); // use two RX pin RX1,RX2 InvertTX(iobase, OFF); InvertRX(iobase, OFF); SlowIRRXLowActive(iobase, OFF); if (IsSIROn(iobase)) { //sir EnGPIOtoRX2(iobase, OFF); WriteGIO(iobase, OFF); EnRX2(iobase, OFF); //sir to rx2 } else { // fir mir EnGPIOtoRX2(iobase, OFF); WriteGIO(iobase, OFF); EnRX2(iobase, OFF); //fir to rx } break; case 0x11: /* Temic TFDS4500 */ IRDA_DEBUG(2, "%s: Temic TFDS4500: One RX pin, TX normal, RX inverted.\n", __func__); UseOneRX(iobase, ON); //use ONE RX....RX1 InvertTX(iobase, OFF); InvertRX(iobase, ON); // invert RX pin EnRX2(iobase, ON); //sir to rx2 EnGPIOtoRX2(iobase, OFF); if( IsSIROn(iobase) ){ //sir // Mode select On SlowIRRXLowActive(iobase, ON); udelay(20); // Mode select Off SlowIRRXLowActive(iobase, OFF); } else{ IRDA_DEBUG(0, "%s: Warning: TFDS4500 not running in SIR mode !\n", __func__); } break; case 0x0ff: /* Vishay */ if (IsSIROn(iobase)) mode = 0; else if (IsMIROn(iobase)) mode = 1; else if (IsFIROn(iobase)) mode = 2; else if (IsVFIROn(iobase)) mode = 5; //VFIR-16 SI_SetMode(iobase, mode); break; default: IRDA_ERROR("%s: Error: dongle_id %d unsupported !\n", __func__, dongle_id); } } /* * Function via_ircc_change_speed (self, baud) * * Change the speed of the device * */ static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 speed) { struct net_device *dev = self->netdev; u16 iobase; u8 value = 0, bTmp; iobase = self->io.fir_base; /* Update accounting for new speed */ self->io.speed = speed; IRDA_DEBUG(1, "%s: change_speed to %d bps.\n", __func__, speed); WriteReg(iobase, I_ST_CT_0, 0x0); /* Controller mode sellection */ switch (speed) { case 2400: case 9600: case 19200: case 38400: case 57600: case 115200: value = (115200/speed)-1; SetSIR(iobase, ON); CRC16(iobase, ON); break; case 576000: /* FIXME: this can't be right, as it's the same as 115200, * and 576000 is MIR, not SIR. */ value = 0; SetSIR(iobase, ON); CRC16(iobase, ON); break; case 1152000: value = 0; SetMIR(iobase, ON); /* FIXME: CRC ??? */ break; case 4000000: value = 0; SetFIR(iobase, ON); SetPulseWidth(iobase, 0); SetSendPreambleCount(iobase, 14); CRC16(iobase, OFF); EnTXCRC(iobase, ON); break; case 16000000: value = 0; SetVFIR(iobase, ON); /* FIXME: CRC ??? */ break; default: value = 0; break; } /* Set baudrate to 0x19[2..7] */ bTmp = (ReadReg(iobase, I_CF_H_1) & 0x03); bTmp |= value << 2; WriteReg(iobase, I_CF_H_1, bTmp); /* Some dongles may need to be informed about speed changes. */ via_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id); /* Set FIFO size to 64 */ SetFIFO(iobase, 64); /* Enable IR */ WriteReg(iobase, I_ST_CT_0, 0x80); // EnTXFIFOHalfLevelInt(iobase,ON); /* Enable some interrupts so we can receive frames */ //EnAllInt(iobase,ON); if (IsSIROn(iobase)) { SIRFilter(iobase, ON); SIRRecvAny(iobase, ON); } else { SIRFilter(iobase, OFF); SIRRecvAny(iobase, OFF); } if (speed > 115200) { /* Install FIR xmit handler */ dev->netdev_ops = &via_ircc_fir_ops; via_ircc_dma_receive(self); } else { /* Install SIR xmit handler */ dev->netdev_ops = &via_ircc_sir_ops; } netif_wake_queue(dev); } /* * Function via_ircc_hard_xmit (skb, dev) * * Transmit the frame! * */ static netdev_tx_t via_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev) { struct via_ircc_cb *self; unsigned long flags; u16 iobase; __u32 speed; self = netdev_priv(dev); IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;); iobase = self->io.fir_base; netif_stop_queue(dev); /* Check if we need to change the speed */ speed = irda_get_next_speed(skb); if ((speed != self->io.speed) && (speed != -1)) { /* Check for empty frame */ if (!skb->len) { via_ircc_change_speed(self, speed); dev->trans_start = jiffies; dev_kfree_skb(skb); return NETDEV_TX_OK; } else self->new_speed = speed; } InitCard(iobase); CommonInit(iobase); SIRFilter(iobase, ON); SetSIR(iobase, ON); CRC16(iobase, ON); EnTXCRC(iobase, 0); WriteReg(iobase, I_ST_CT_0, 0x00); spin_lock_irqsave(&self->lock, flags); self->tx_buff.data = self->tx_buff.head; self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, self->tx_buff.truesize); dev->stats.tx_bytes += self->tx_buff.len; /* Send this frame with old speed */ SetBaudRate(iobase, self->io.speed); SetPulseWidth(iobase, 12); SetSendPreambleCount(iobase, 0); WriteReg(iobase, I_ST_CT_0, 0x80); EnableTX(iobase, ON); EnableRX(iobase, OFF); ResetChip(iobase, 0); ResetChip(iobase, 1); ResetChip(iobase, 2); ResetChip(iobase, 3); ResetChip(iobase, 4); EnAllInt(iobase, ON); EnTXDMA(iobase, ON); EnRXDMA(iobase, OFF); irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len, DMA_TX_MODE); SetSendByte(iobase, self->tx_buff.len); RXStart(iobase, OFF); TXStart(iobase, ON); dev->trans_start = jiffies; spin_unlock_irqrestore(&self->lock, flags); dev_kfree_skb(skb); return NETDEV_TX_OK; } static netdev_tx_t via_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev) { struct via_ircc_cb *self; u16 iobase; __u32 speed; unsigned long flags; self = netdev_priv(dev); iobase = self->io.fir_base; if (self->st_fifo.len) return NETDEV_TX_OK; if (self->chip_id == 0x3076) iodelay(1500); else udelay(1500); netif_stop_queue(dev); speed = irda_get_next_speed(skb); if ((speed != self->io.speed) && (speed != -1)) { if (!skb->len) { via_ircc_change_speed(self, speed); dev->trans_start = jiffies; dev_kfree_skb(skb); return NETDEV_TX_OK; } else self->new_speed = speed; } spin_lock_irqsave(&self->lock, flags); self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail; self->tx_fifo.queue[self->tx_fifo.free].len = skb->len; self->tx_fifo.tail += skb->len; dev->stats.tx_bytes += skb->len; skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start, skb->len); self->tx_fifo.len++; self->tx_fifo.free++; //F01 if (self->tx_fifo.len == 1) { via_ircc_dma_xmit(self, iobase); //F01 } //F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) netif_wake_queue(self->netdev); dev->trans_start = jiffies; dev_kfree_skb(skb); spin_unlock_irqrestore(&self->lock, flags); return NETDEV_TX_OK; } static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase) { EnTXDMA(iobase, OFF); self->io.direction = IO_XMIT; EnPhys(iobase, ON); EnableTX(iobase, ON); EnableRX(iobase, OFF); ResetChip(iobase, 0); ResetChip(iobase, 1); ResetChip(iobase, 2); ResetChip(iobase, 3); ResetChip(iobase, 4); EnAllInt(iobase, ON); EnTXDMA(iobase, ON); EnRXDMA(iobase, OFF); irda_setup_dma(self->io.dma, ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start - self->tx_buff.head) + self->tx_buff_dma, self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE); IRDA_DEBUG(1, "%s: tx_fifo.ptr=%x,len=%x,tx_fifo.len=%x..\n", __func__, self->tx_fifo.ptr, self->tx_fifo.queue[self->tx_fifo.ptr].len, self->tx_fifo.len); SetSendByte(iobase, self->tx_fifo.queue[self->tx_fifo.ptr].len); RXStart(iobase, OFF); TXStart(iobase, ON); return 0; } /* * Function via_ircc_dma_xmit_complete (self) * * The transfer of a frame in finished. This function will only be called * by the interrupt handler * */ static int via_ircc_dma_xmit_complete(struct via_ircc_cb *self) { int iobase; int ret = TRUE; u8 Tx_status; IRDA_DEBUG(3, "%s()\n", __func__); iobase = self->io.fir_base; /* Disable DMA */ // DisableDmaChannel(self->io.dma); /* Check for underrun! */ /* Clear bit, by writing 1 into it */ Tx_status = GetTXStatus(iobase); if (Tx_status & 0x08) { self->netdev->stats.tx_errors++; self->netdev->stats.tx_fifo_errors++; hwreset(self); /* how to clear underrun? */ } else { self->netdev->stats.tx_packets++; ResetChip(iobase, 3); ResetChip(iobase, 4); } /* Check if we need to change the speed */ if (self->new_speed) { via_ircc_change_speed(self, self->new_speed); self->new_speed = 0; } /* Finished with this frame, so prepare for next */ if (IsFIROn(iobase)) { if (self->tx_fifo.len) { self->tx_fifo.len--; self->tx_fifo.ptr++; } } IRDA_DEBUG(1, "%s: tx_fifo.len=%x ,tx_fifo.ptr=%x,tx_fifo.free=%x...\n", __func__, self->tx_fifo.len, self->tx_fifo.ptr, self->tx_fifo.free); /* F01_S // Any frames to be sent back-to-back? if (self->tx_fifo.len) { // Not finished yet! via_ircc_dma_xmit(self, iobase); ret = FALSE; } else { F01_E*/ // Reset Tx FIFO info self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; self->tx_fifo.tail = self->tx_buff.head; //F01 } // Make sure we have room for more frames //F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) { // Not busy transmitting anymore // Tell the network layer, that we can accept more frames netif_wake_queue(self->netdev); //F01 } return ret; } /* * Function via_ircc_dma_receive (self) * * Set configuration for receive a frame. * */ static int via_ircc_dma_receive(struct via_ircc_cb *self) { int iobase; iobase = self->io.fir_base; IRDA_DEBUG(3, "%s()\n", __func__); self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0; self->tx_fifo.tail = self->tx_buff.head; self->RxDataReady = 0; self->io.direction = IO_RECV; self->rx_buff.data = self->rx_buff.head; self->st_fifo.len = self->st_fifo.pending_bytes = 0; self->st_fifo.tail = self->st_fifo.head = 0; EnPhys(iobase, ON); EnableTX(iobase, OFF); EnableRX(iobase, ON); ResetChip(iobase, 0); ResetChip(iobase, 1); ResetChip(iobase, 2); ResetChip(iobase, 3); ResetChip(iobase, 4); EnAllInt(iobase, ON); EnTXDMA(iobase, OFF); EnRXDMA(iobase, ON); irda_setup_dma(self->io.dma2, self->rx_buff_dma, self->rx_buff.truesize, DMA_RX_MODE); TXStart(iobase, OFF); RXStart(iobase, ON); return 0; } /* * Function via_ircc_dma_receive_complete (self) * * Controller Finished with receiving frames, * and this routine is call by ISR * */ static int via_ircc_dma_receive_complete(struct via_ircc_cb *self, int iobase) { struct st_fifo *st_fifo; struct sk_buff *skb; int len, i; u8 status = 0; iobase = self->io.fir_base; st_fifo = &self->st_fifo; if (self->io.speed < 4000000) { //Speed below FIR len = GetRecvByte(iobase, self); skb = dev_alloc_skb(len + 1); if (skb == NULL) return FALSE; // Make sure IP header gets aligned skb_reserve(skb, 1); skb_put(skb, len - 2); if (self->chip_id == 0x3076) { for (i = 0; i < len - 2; i++) skb->data[i] = self->rx_buff.data[i * 2]; } else { if (self->chip_id == 0x3096) { for (i = 0; i < len - 2; i++) skb->data[i] = self->rx_buff.data[i]; } } // Move to next frame self->rx_buff.data += len; self->netdev->stats.rx_bytes += len; self->netdev->stats.rx_packets++; skb->dev = self->netdev; skb_reset_mac_header(skb); skb->protocol = htons(ETH_P_IRDA); netif_rx(skb); return TRUE; } else { //FIR mode len = GetRecvByte(iobase, self); if (len == 0) return TRUE; //interrupt only, data maybe move by RxT if (((len - 4) < 2) || ((len - 4) > 2048)) { IRDA_DEBUG(1, "%s(): Trouble:len=%x,CurCount=%x,LastCount=%x..\n", __func__, len, RxCurCount(iobase, self), self->RxLastCount); hwreset(self); return FALSE; } IRDA_DEBUG(2, "%s(): fifo.len=%x,len=%x,CurCount=%x..\n", __func__, st_fifo->len, len - 4, RxCurCount(iobase, self)); st_fifo->entries[st_fifo->tail].status = status; st_fifo->entries[st_fifo->tail].len = len; st_fifo->pending_bytes += len; st_fifo->tail++; st_fifo->len++; if (st_fifo->tail > MAX_RX_WINDOW) st_fifo->tail = 0; self->RxDataReady = 0; // It maybe have MAX_RX_WINDOW package receive by // receive_complete before Timer IRQ /* F01_S if (st_fifo->len < (MAX_RX_WINDOW+2 )) { RXStart(iobase,ON); SetTimer(iobase,4); } else { F01_E */ EnableRX(iobase, OFF); EnRXDMA(iobase, OFF); RXStart(iobase, OFF); //F01_S // Put this entry back in fifo if (st_fifo->head > MAX_RX_WINDOW) st_fifo->head = 0; status = st_fifo->entries[st_fifo->head].status; len = st_fifo->entries[st_fifo->head].len; st_fifo->head++; st_fifo->len--; skb = dev_alloc_skb(len + 1 - 4); /* * if frame size, data ptr, or skb ptr are wrong, then get next * entry. */ if ((skb == NULL) || (skb->data == NULL) || (self->rx_buff.data == NULL) || (len < 6)) { self->netdev->stats.rx_dropped++; kfree_skb(skb); return TRUE; } skb_reserve(skb, 1); skb_put(skb, len - 4); skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4); IRDA_DEBUG(2, "%s(): len=%x.rx_buff=%p\n", __func__, len - 4, self->rx_buff.data); // Move to next frame self->rx_buff.data += len; self->netdev->stats.rx_bytes += len; self->netdev->stats.rx_packets++; skb->dev = self->netdev; skb_reset_mac_header(skb); skb->protocol = htons(ETH_P_IRDA); netif_rx(skb); //F01_E } //FIR return TRUE; } /* * if frame is received , but no INT ,then use this routine to upload frame. */ static int upload_rxdata(struct via_ircc_cb *self, int iobase) { struct sk_buff *skb; int len; struct st_fifo *st_fifo; st_fifo = &self->st_fifo; len = GetRecvByte(iobase, self); IRDA_DEBUG(2, "%s(): len=%x\n", __func__, len); if ((len - 4) < 2) { self->netdev->stats.rx_dropped++; return FALSE; } skb = dev_alloc_skb(len + 1); if (skb == NULL) { self->netdev->stats.rx_dropped++; return FALSE; } skb_reserve(skb, 1); skb_put(skb, len - 4 + 1); skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4 + 1); st_fifo->tail++; st_fifo->len++; if (st_fifo->tail > MAX_RX_WINDOW) st_fifo->tail = 0; // Move to next frame self->rx_buff.data += len; self->netdev->stats.rx_bytes += len; self->netdev->stats.rx_packets++; skb->dev = self->netdev; skb_reset_mac_header(skb); skb->protocol = htons(ETH_P_IRDA); netif_rx(skb); if (st_fifo->len < (MAX_RX_WINDOW + 2)) { RXStart(iobase, ON); } else { EnableRX(iobase, OFF); EnRXDMA(iobase, OFF); RXStart(iobase, OFF); } return TRUE; } /* * Implement back to back receive , use this routine to upload data. */ static int RxTimerHandler(struct via_ircc_cb *self, int iobase) { struct st_fifo *st_fifo; struct sk_buff *skb; int len; u8 status; st_fifo = &self->st_fifo; if (CkRxRecv(iobase, self)) { // if still receiving ,then return ,don't upload frame self->RetryCount = 0; SetTimer(iobase, 20); self->RxDataReady++; return FALSE; } else self->RetryCount++; if ((self->RetryCount >= 1) || ((st_fifo->pending_bytes + 2048) > self->rx_buff.truesize) || (st_fifo->len >= (MAX_RX_WINDOW))) { while (st_fifo->len > 0) { //upload frame // Put this entry back in fifo if (st_fifo->head > MAX_RX_WINDOW) st_fifo->head = 0; status = st_fifo->entries[st_fifo->head].status; len = st_fifo->entries[st_fifo->head].len; st_fifo->head++; st_fifo->len--; skb = dev_alloc_skb(len + 1 - 4); /* * if frame size, data ptr, or skb ptr are wrong, * then get next entry. */ if ((skb == NULL) || (skb->data == NULL) || (self->rx_buff.data == NULL) || (len < 6)) { self->netdev->stats.rx_dropped++; continue; } skb_reserve(skb, 1); skb_put(skb, len - 4); skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4); IRDA_DEBUG(2, "%s(): len=%x.head=%x\n", __func__, len - 4, st_fifo->head); // Move to next frame self->rx_buff.data += len; self->netdev->stats.rx_bytes += len; self->netdev->stats.rx_packets++; skb->dev = self->netdev; skb_reset_mac_header(skb); skb->protocol = htons(ETH_P_IRDA); netif_rx(skb); } //while self->RetryCount = 0; IRDA_DEBUG(2, "%s(): End of upload HostStatus=%x,RxStatus=%x\n", __func__, GetHostStatus(iobase), GetRXStatus(iobase)); /* * if frame is receive complete at this routine ,then upload * frame. */ if ((GetRXStatus(iobase) & 0x10) && (RxCurCount(iobase, self) != self->RxLastCount)) { upload_rxdata(self, iobase); if (irda_device_txqueue_empty(self->netdev)) via_ircc_dma_receive(self); } } // timer detect complete else SetTimer(iobase, 4); return TRUE; } /* * Function via_ircc_interrupt (irq, dev_id) * * An interrupt from the chip has arrived. Time to do some work * */ static irqreturn_t via_ircc_interrupt(int dummy, void *dev_id) { struct net_device *dev = dev_id; struct via_ircc_cb *self = netdev_priv(dev); int iobase; u8 iHostIntType, iRxIntType, iTxIntType; iobase = self->io.fir_base; spin_lock(&self->lock); iHostIntType = GetHostStatus(iobase); IRDA_DEBUG(4, "%s(): iHostIntType %02x: %s %s %s %02x\n", __func__, iHostIntType, (iHostIntType & 0x40) ? "Timer" : "", (iHostIntType & 0x20) ? "Tx" : "", (iHostIntType & 0x10) ? "Rx" : "", (iHostIntType & 0x0e) >> 1); if ((iHostIntType & 0x40) != 0) { //Timer Event self->EventFlag.TimeOut++; ClearTimerInt(iobase, 1); if (self->io.direction == IO_XMIT) { via_ircc_dma_xmit(self, iobase); } if (self->io.direction == IO_RECV) { /* * frame ready hold too long, must reset. */ if (self->RxDataReady > 30) { hwreset(self); if (irda_device_txqueue_empty(self->netdev)) { via_ircc_dma_receive(self); } } else { // call this to upload frame. RxTimerHandler(self, iobase); } } //RECV } //Timer Event if ((iHostIntType & 0x20) != 0) { //Tx Event iTxIntType = GetTXStatus(iobase); IRDA_DEBUG(4, "%s(): iTxIntType %02x: %s %s %s %s\n", __func__, iTxIntType, (iTxIntType & 0x08) ? "FIFO underr." : "", (iTxIntType & 0x04) ? "EOM" : "", (iTxIntType & 0x02) ? "FIFO ready" : "", (iTxIntType & 0x01) ? "Early EOM" : ""); if (iTxIntType & 0x4) { self->EventFlag.EOMessage++; // read and will auto clean if (via_ircc_dma_xmit_complete(self)) { if (irda_device_txqueue_empty (self->netdev)) { via_ircc_dma_receive(self); } } else { self->EventFlag.Unknown++; } } //EOP } //Tx Event //---------------------------------------- if ((iHostIntType & 0x10) != 0) { //Rx Event /* Check if DMA has finished */ iRxIntType = GetRXStatus(iobase); IRDA_DEBUG(4, "%s(): iRxIntType %02x: %s %s %s %s %s %s %s\n", __func__, iRxIntType, (iRxIntType & 0x80) ? "PHY err." : "", (iRxIntType & 0x40) ? "CRC err" : "", (iRxIntType & 0x20) ? "FIFO overr." : "", (iRxIntType & 0x10) ? "EOF" : "", (iRxIntType & 0x08) ? "RxData" : "", (iRxIntType & 0x02) ? "RxMaxLen" : "", (iRxIntType & 0x01) ? "SIR bad" : ""); if (!iRxIntType) IRDA_DEBUG(3, "%s(): RxIRQ =0\n", __func__); if (iRxIntType & 0x10) { if (via_ircc_dma_receive_complete(self, iobase)) { //F01 if(!(IsFIROn(iobase))) via_ircc_dma_receive(self); via_ircc_dma_receive(self); } } // No ERR else { //ERR IRDA_DEBUG(4, "%s(): RxIRQ ERR:iRxIntType=%x,HostIntType=%x,CurCount=%x,RxLastCount=%x_____\n", __func__, iRxIntType, iHostIntType, RxCurCount(iobase, self), self->RxLastCount); if (iRxIntType & 0x20) { //FIFO OverRun ERR ResetChip(iobase, 0); ResetChip(iobase, 1); } else { //PHY,CRC ERR if (iRxIntType != 0x08) hwreset(self); //F01 } via_ircc_dma_receive(self); } //ERR } //Rx Event spin_unlock(&self->lock); return IRQ_RETVAL(iHostIntType); } static void hwreset(struct via_ircc_cb *self) { int iobase; iobase = self->io.fir_base; IRDA_DEBUG(3, "%s()\n", __func__); ResetChip(iobase, 5); EnableDMA(iobase, OFF); EnableTX(iobase, OFF); EnableRX(iobase, OFF); EnRXDMA(iobase, OFF); EnTXDMA(iobase, OFF); RXStart(iobase, OFF); TXStart(iobase, OFF); InitCard(iobase); CommonInit(iobase); SIRFilter(iobase, ON); SetSIR(iobase, ON); CRC16(iobase, ON); EnTXCRC(iobase, 0); WriteReg(iobase, I_ST_CT_0, 0x00); SetBaudRate(iobase, 9600); SetPulseWidth(iobase, 12); SetSendPreambleCount(iobase, 0); WriteReg(iobase, I_ST_CT_0, 0x80); /* Restore speed. */ via_ircc_change_speed(self, self->io.speed); self->st_fifo.len = 0; } /* * Function via_ircc_is_receiving (self) * * Return TRUE is we are currently receiving a frame * */ static int via_ircc_is_receiving(struct via_ircc_cb *self) { int status = FALSE; int iobase; IRDA_ASSERT(self != NULL, return FALSE;); iobase = self->io.fir_base; if (CkRxRecv(iobase, self)) status = TRUE; IRDA_DEBUG(2, "%s(): status=%x....\n", __func__, status); return status; } /* * Function via_ircc_net_open (dev) * * Start the device * */ static int via_ircc_net_open(struct net_device *dev) { struct via_ircc_cb *self; int iobase; char hwname[32]; IRDA_DEBUG(3, "%s()\n", __func__); IRDA_ASSERT(dev != NULL, return -1;); self = netdev_priv(dev); dev->stats.rx_packets = 0; IRDA_ASSERT(self != NULL, return 0;); iobase = self->io.fir_base; if (request_irq(self->io.irq, via_ircc_interrupt, 0, dev->name, dev)) { IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name, self->io.irq); return -EAGAIN; } /* * Always allocate the DMA channel after the IRQ, and clean up on * failure. */ if (request_dma(self->io.dma, dev->name)) { IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name, self->io.dma); free_irq(self->io.irq, self); return -EAGAIN; } if (self->io.dma2 != self->io.dma) { if (request_dma(self->io.dma2, dev->name)) { IRDA_WARNING("%s, unable to allocate dma2=%d\n", driver_name, self->io.dma2); free_irq(self->io.irq, self); free_dma(self->io.dma); return -EAGAIN; } } /* turn on interrupts */ EnAllInt(iobase, ON); EnInternalLoop(iobase, OFF); EnExternalLoop(iobase, OFF); /* */ via_ircc_dma_receive(self); /* Ready to play! */ netif_start_queue(dev); /* * Open new IrLAP layer instance, now that everything should be * initialized properly */ sprintf(hwname, "VIA @ 0x%x", iobase); self->irlap = irlap_open(dev, &self->qos, hwname); self->RxLastCount = 0; return 0; } /* * Function via_ircc_net_close (dev) * * Stop the device * */ static int via_ircc_net_close(struct net_device *dev) { struct via_ircc_cb *self; int iobase; IRDA_DEBUG(3, "%s()\n", __func__); IRDA_ASSERT(dev != NULL, return -1;); self = netdev_priv(dev); IRDA_ASSERT(self != NULL, return 0;); /* Stop device */ netif_stop_queue(dev); /* Stop and remove instance of IrLAP */ if (self->irlap) irlap_close(self->irlap); self->irlap = NULL; iobase = self->io.fir_base; EnTXDMA(iobase, OFF); EnRXDMA(iobase, OFF); DisableDmaChannel(self->io.dma); /* Disable interrupts */ EnAllInt(iobase, OFF); free_irq(self->io.irq, dev); free_dma(self->io.dma); if (self->io.dma2 != self->io.dma) free_dma(self->io.dma2); return 0; } /* * Function via_ircc_net_ioctl (dev, rq, cmd) * * Process IOCTL commands for this device * */ static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) { struct if_irda_req *irq = (struct if_irda_req *) rq; struct via_ircc_cb *self; unsigned long flags; int ret = 0; IRDA_ASSERT(dev != NULL, return -1;); self = netdev_priv(dev); IRDA_ASSERT(self != NULL, return -1;); IRDA_DEBUG(1, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd); /* Disable interrupts & save flags */ spin_lock_irqsave(&self->lock, flags); switch (cmd) { case SIOCSBANDWIDTH: /* Set bandwidth */ if (!capable(CAP_NET_ADMIN)) { ret = -EPERM; goto out; } via_ircc_change_speed(self, irq->ifr_baudrate); break; case SIOCSMEDIABUSY: /* Set media busy */ if (!capable(CAP_NET_ADMIN)) { ret = -EPERM; goto out; } irda_device_set_media_busy(self->netdev, TRUE); break; case SIOCGRECEIVING: /* Check if we are receiving right now */ irq->ifr_receiving = via_ircc_is_receiving(self); break; default: ret = -EOPNOTSUPP; } out: spin_unlock_irqrestore(&self->lock, flags); return ret; } MODULE_AUTHOR("VIA Technologies,inc"); MODULE_DESCRIPTION("VIA IrDA Device Driver"); MODULE_LICENSE("GPL"); module_init(via_ircc_init); module_exit(via_ircc_cleanup);