diff options
Diffstat (limited to 'kernel/drivers/isdn/hisax/bkm_a4t.c')
| -rw-r--r-- | kernel/drivers/isdn/hisax/bkm_a4t.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/kernel/drivers/isdn/hisax/bkm_a4t.c b/kernel/drivers/isdn/hisax/bkm_a4t.c new file mode 100644 index 000000000..c360164bd --- /dev/null +++ b/kernel/drivers/isdn/hisax/bkm_a4t.c @@ -0,0 +1,358 @@ +/* $Id: bkm_a4t.c,v 1.22.2.4 2004/01/14 16:04:48 keil Exp $ + * + * low level stuff for T-Berkom A4T + * + * Author Roland Klabunde + * Copyright by Roland Klabunde <R.Klabunde@Berkom.de> + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + */ + + +#include <linux/init.h> +#include "hisax.h" +#include "isac.h" +#include "hscx.h" +#include "jade.h" +#include "isdnl1.h" +#include <linux/pci.h> +#include "bkm_ax.h" + +static const char *bkm_a4t_revision = "$Revision: 1.22.2.4 $"; + + +static inline u_char +readreg(unsigned int ale, unsigned long adr, u_char off) +{ + register u_int ret; + unsigned int *po = (unsigned int *) adr; /* Postoffice */ + + *po = (GCS_2 | PO_WRITE | off); + __WAITI20__(po); + *po = (ale | PO_READ); + __WAITI20__(po); + ret = *po; + return ((unsigned char) ret); +} + + +static inline void +readfifo(unsigned int ale, unsigned long adr, u_char off, u_char *data, int size) +{ + int i; + for (i = 0; i < size; i++) + *data++ = readreg(ale, adr, off); +} + + +static inline void +writereg(unsigned int ale, unsigned long adr, u_char off, u_char data) +{ + unsigned int *po = (unsigned int *) adr; /* Postoffice */ + *po = (GCS_2 | PO_WRITE | off); + __WAITI20__(po); + *po = (ale | PO_WRITE | data); + __WAITI20__(po); +} + + +static inline void +writefifo(unsigned int ale, unsigned long adr, u_char off, u_char *data, int size) +{ + int i; + + for (i = 0; i < size; i++) + writereg(ale, adr, off, *data++); +} + + +/* Interface functions */ + +static u_char +ReadISAC(struct IsdnCardState *cs, u_char offset) +{ + return (readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset)); +} + +static void +WriteISAC(struct IsdnCardState *cs, u_char offset, u_char value) +{ + writereg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, offset, value); +} + +static void +ReadISACfifo(struct IsdnCardState *cs, u_char *data, int size) +{ + readfifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size); +} + +static void +WriteISACfifo(struct IsdnCardState *cs, u_char *data, int size) +{ + writefifo(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, 0, data, size); +} + +static u_char +ReadJADE(struct IsdnCardState *cs, int jade, u_char offset) +{ + return (readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80)))); +} + +static void +WriteJADE(struct IsdnCardState *cs, int jade, u_char offset, u_char value) +{ + writereg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, offset + (jade == -1 ? 0 : (jade ? 0xC0 : 0x80)), value); +} + +/* + * fast interrupt JADE stuff goes here + */ + +#define READJADE(cs, nr, reg) readreg(cs->hw.ax.jade_ale, \ + cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80))) +#define WRITEJADE(cs, nr, reg, data) writereg(cs->hw.ax.jade_ale, \ + cs->hw.ax.jade_adr, reg + (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), data) + +#define READJADEFIFO(cs, nr, ptr, cnt) readfifo(cs->hw.ax.jade_ale, \ + cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt) +#define WRITEJADEFIFO(cs, nr, ptr, cnt) writefifo(cs->hw.ax.jade_ale, \ + cs->hw.ax.jade_adr, (nr == -1 ? 0 : (nr ? 0xC0 : 0x80)), ptr, cnt) + +#include "jade_irq.c" + +static irqreturn_t +bkm_interrupt(int intno, void *dev_id) +{ + struct IsdnCardState *cs = dev_id; + u_char val = 0; + u_long flags; + I20_REGISTER_FILE *pI20_Regs; + + spin_lock_irqsave(&cs->lock, flags); + pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base); + + /* ISDN interrupt pending? */ + if (pI20_Regs->i20IntStatus & intISDN) { + /* Reset the ISDN interrupt */ + pI20_Regs->i20IntStatus = intISDN; + /* Disable ISDN interrupt */ + pI20_Regs->i20IntCtrl &= ~intISDN; + /* Channel A first */ + val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0x80); + if (val) { + jade_int_main(cs, val, 0); + } + /* Channel B */ + val = readreg(cs->hw.ax.jade_ale, cs->hw.ax.jade_adr, jade_HDLC_ISR + 0xC0); + if (val) { + jade_int_main(cs, val, 1); + } + /* D-Channel */ + val = readreg(cs->hw.ax.isac_ale, cs->hw.ax.isac_adr, ISAC_ISTA); + if (val) { + isac_interrupt(cs, val); + } + /* Reenable ISDN interrupt */ + pI20_Regs->i20IntCtrl |= intISDN; + spin_unlock_irqrestore(&cs->lock, flags); + return IRQ_HANDLED; + } else { + spin_unlock_irqrestore(&cs->lock, flags); + return IRQ_NONE; + } +} + +static void +release_io_bkm(struct IsdnCardState *cs) +{ + if (cs->hw.ax.base) { + iounmap((void *) cs->hw.ax.base); + cs->hw.ax.base = 0; + } +} + +static void +enable_bkm_int(struct IsdnCardState *cs, unsigned bEnable) +{ + if (cs->typ == ISDN_CTYPE_BKM_A4T) { + I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base); + if (bEnable) + pI20_Regs->i20IntCtrl |= (intISDN | intPCI); + else + /* CAUTION: This disables the video capture driver too */ + pI20_Regs->i20IntCtrl &= ~(intISDN | intPCI); + } +} + +static void +reset_bkm(struct IsdnCardState *cs) +{ + if (cs->typ == ISDN_CTYPE_BKM_A4T) { + I20_REGISTER_FILE *pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base); + /* Issue the I20 soft reset */ + pI20_Regs->i20SysControl = 0xFF; /* all in */ + mdelay(10); + /* Remove the soft reset */ + pI20_Regs->i20SysControl = sysRESET | 0xFF; + mdelay(10); + /* Set our configuration */ + pI20_Regs->i20SysControl = sysRESET | sysCFG; + /* Issue ISDN reset */ + pI20_Regs->i20GuestControl = guestWAIT_CFG | + g_A4T_JADE_RES | + g_A4T_ISAR_RES | + g_A4T_ISAC_RES | + g_A4T_JADE_BOOTR | + g_A4T_ISAR_BOOTR; + mdelay(10); + + /* Remove RESET state from ISDN */ + pI20_Regs->i20GuestControl &= ~(g_A4T_ISAC_RES | + g_A4T_JADE_RES | + g_A4T_ISAR_RES); + mdelay(10); + } +} + +static int +BKM_card_msg(struct IsdnCardState *cs, int mt, void *arg) +{ + u_long flags; + + switch (mt) { + case CARD_RESET: + /* Disable ints */ + spin_lock_irqsave(&cs->lock, flags); + enable_bkm_int(cs, 0); + reset_bkm(cs); + spin_unlock_irqrestore(&cs->lock, flags); + return (0); + case CARD_RELEASE: + /* Sanity */ + spin_lock_irqsave(&cs->lock, flags); + enable_bkm_int(cs, 0); + reset_bkm(cs); + spin_unlock_irqrestore(&cs->lock, flags); + release_io_bkm(cs); + return (0); + case CARD_INIT: + spin_lock_irqsave(&cs->lock, flags); + clear_pending_isac_ints(cs); + clear_pending_jade_ints(cs); + initisac(cs); + initjade(cs); + /* Enable ints */ + enable_bkm_int(cs, 1); + spin_unlock_irqrestore(&cs->lock, flags); + return (0); + case CARD_TEST: + return (0); + } + return (0); +} + +static int a4t_pci_probe(struct pci_dev *dev_a4t, struct IsdnCardState *cs, + u_int *found, u_int *pci_memaddr) +{ + u16 sub_sys; + u16 sub_vendor; + + sub_vendor = dev_a4t->subsystem_vendor; + sub_sys = dev_a4t->subsystem_device; + if ((sub_sys == PCI_DEVICE_ID_BERKOM_A4T) && (sub_vendor == PCI_VENDOR_ID_BERKOM)) { + if (pci_enable_device(dev_a4t)) + return (0); /* end loop & function */ + *found = 1; + *pci_memaddr = pci_resource_start(dev_a4t, 0); + cs->irq = dev_a4t->irq; + return (1); /* end loop */ + } + + return (-1); /* continue looping */ +} + +static int a4t_cs_init(struct IsdnCard *card, struct IsdnCardState *cs, + u_int pci_memaddr) +{ + I20_REGISTER_FILE *pI20_Regs; + + if (!cs->irq) { /* IRQ range check ?? */ + printk(KERN_WARNING "HiSax: Telekom A4T: No IRQ\n"); + return (0); + } + cs->hw.ax.base = (long) ioremap(pci_memaddr, 4096); + /* Check suspecious address */ + pI20_Regs = (I20_REGISTER_FILE *) (cs->hw.ax.base); + if ((pI20_Regs->i20IntStatus & 0x8EFFFFFF) != 0) { + printk(KERN_WARNING "HiSax: Telekom A4T address " + "%lx-%lx suspicious\n", + cs->hw.ax.base, cs->hw.ax.base + 4096); + iounmap((void *) cs->hw.ax.base); + cs->hw.ax.base = 0; + return (0); + } + cs->hw.ax.isac_adr = cs->hw.ax.base + PO_OFFSET; + cs->hw.ax.jade_adr = cs->hw.ax.base + PO_OFFSET; + cs->hw.ax.isac_ale = GCS_1; + cs->hw.ax.jade_ale = GCS_3; + + printk(KERN_INFO "HiSax: Telekom A4T: Card configured at " + "0x%lX IRQ %d\n", + cs->hw.ax.base, cs->irq); + + setup_isac(cs); + cs->readisac = &ReadISAC; + cs->writeisac = &WriteISAC; + cs->readisacfifo = &ReadISACfifo; + cs->writeisacfifo = &WriteISACfifo; + cs->BC_Read_Reg = &ReadJADE; + cs->BC_Write_Reg = &WriteJADE; + cs->BC_Send_Data = &jade_fill_fifo; + cs->cardmsg = &BKM_card_msg; + cs->irq_func = &bkm_interrupt; + cs->irq_flags |= IRQF_SHARED; + ISACVersion(cs, "Telekom A4T:"); + /* Jade version */ + JadeVersion(cs, "Telekom A4T:"); + + return (1); +} + +static struct pci_dev *dev_a4t = NULL; + +int setup_bkm_a4t(struct IsdnCard *card) +{ + struct IsdnCardState *cs = card->cs; + char tmp[64]; + u_int pci_memaddr = 0, found = 0; + int ret; + + strcpy(tmp, bkm_a4t_revision); + printk(KERN_INFO "HiSax: T-Berkom driver Rev. %s\n", HiSax_getrev(tmp)); + if (cs->typ == ISDN_CTYPE_BKM_A4T) { + cs->subtyp = BKM_A4T; + } else + return (0); + + while ((dev_a4t = hisax_find_pci_device(PCI_VENDOR_ID_ZORAN, + PCI_DEVICE_ID_ZORAN_36120, dev_a4t))) { + ret = a4t_pci_probe(dev_a4t, cs, &found, &pci_memaddr); + if (!ret) + return (0); + if (ret > 0) + break; + } + if (!found) { + printk(KERN_WARNING "HiSax: Telekom A4T: Card not found\n"); + return (0); + } + if (!pci_memaddr) { + printk(KERN_WARNING "HiSax: Telekom A4T: " + "No Memory base address\n"); + return (0); + } + + return a4t_cs_init(card, cs, pci_memaddr); +} |