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/*

 * Support for common PCI multi-I/O cards (which is most of them)

 *

 * Copyright (C) 2001  Tim Waugh <twaugh@redhat.com>

 *

 * 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 of the License, or (at your option) any later version.

 *

 *

 * Multi-function PCI cards are supposed to present separate logical

 * devices on the bus.  A common thing to do seems to be to just use

 * one logical device with lots of base address registers for both

 * parallel ports and serial ports.  This driver is for dealing with

 * that.

 *

 */

#include <linux/types.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/pci.h>

#include <linux/parport.h>

#include <linux/parport_pc.h>

#include <linux/serial.h>

#include <linux/serialP.h>

#include <linux/list.h>

#include <asm/serial.h>

enum parport_pc_pci_cards {

        titan_110l = 0,

        titan_210l,

        avlab_1s1p,

        avlab_1s1p_650,

        avlab_1s1p_850,

        avlab_1s2p,

        avlab_1s2p_650,

        avlab_1s2p_850,

        avlab_2s1p,

        avlab_2s1p_650,

        avlab_2s1p_850,

        siig_1s1p_10x,

        siig_2s1p_10x,

        siig_2p1s_20x,

        siig_1s1p_20x,

        siig_2s1p_20x,

};

/* each element directly indexed from enum list, above */

static struct parport_pc_pci {

        int numports;

        struct { /* BAR (base address registers) numbers in the config

                    space header */

                int lo;

                int hi; /* -1 if not there, >6 for offset-method (max

                           BAR is 6) */

        } addr[4];

        /* If set, this is called immediately after pci_enable_device.

         * If it returns non-zero, no probing will take place and the

         * ports will not be used. */

        int (*preinit_hook) (struct pci_dev *pdev, int autoirq, int autodma);

        /* If set, this is called after probing for ports.  If 'failed'

         * is non-zero we couldn't use any of the ports. */

        void (*postinit_hook) (struct pci_dev *pdev, int failed);

} cards[] __devinitdata = {

        /* titan_110l */                { 1, { { 3, -1 }, } },

        /* titan_210l */                { 1, { { 3, -1 }, } },

        /* avlab_1s1p     */            { 1, { { 1, 2}, } },

        /* avlab_1s1p_650 */            { 1, { { 1, 2}, } },

        /* avlab_1s1p_850 */            { 1, { { 1, 2}, } },

        /* avlab_1s2p     */            { 2, { { 1, 2}, { 3, 4 },} },

        /* avlab_1s2p_650 */            { 2, { { 1, 2}, { 3, 4 },} },

        /* avlab_1s2p_850 */            { 2, { { 1, 2}, { 3, 4 },} },

        /* avlab_2s1p     */            { 1, { { 2, 3}, } },

        /* avlab_2s1p_650 */            { 1, { { 2, 3}, } },

        /* avlab_2s1p_850 */            { 1, { { 2, 3}, } },

        /* siig_1s1p_10x */             { 1, { { 3, 4 }, } },

        /* siig_2s1p_10x */             { 1, { { 4, 5 }, } },

        /* siig_2p1s_20x */             { 2, { { 1, 2 }, { 3, 4 }, } },

        /* siig_1s1p_20x */             { 1, { { 1, 2 }, } },

        /* siig_2s1p_20x */             { 1, { { 2, 3 }, } },

};

static struct pci_device_id parport_serial_pci_tbl[] __devinitdata = {

        /* PCI cards */

        { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_110L,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_110l },

        { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_210L,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, titan_210l },

        /* PCI_VENDOR_ID_AVLAB/Intek21 has another bunch of cards ...*/

        { 0x14db, 0x2110, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s1p},

        { 0x14db, 0x2111, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s1p_650},

        { 0x14db, 0x2112, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s1p_850},

        { 0x14db, 0x2140, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s2p},

        { 0x14db, 0x2141, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s2p_650},

        { 0x14db, 0x2142, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_1s2p_850},

        { 0x14db, 0x2160, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2s1p},

        { 0x14db, 0x2161, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2s1p_650},

        { 0x14db, 0x2162, PCI_ANY_ID, PCI_ANY_ID, 0, 0, avlab_2s1p_850},

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_550,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_10x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_650,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_10x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_850,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_10x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_550,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_10x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_650,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_10x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_850,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_10x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_550,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p1s_20x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_650,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p1s_20x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_850,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2p1s_20x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_550,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_650,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_20x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_850,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_1s1p_20x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_550,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_650,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x },

        { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_850,

          PCI_ANY_ID, PCI_ANY_ID, 0, 0, siig_2s1p_20x },

        { 0, } /* terminate list */

};

MODULE_DEVICE_TABLE(pci,parport_serial_pci_tbl);

struct pci_board_no_ids {

        int flags;

        int num_ports;

        int base_baud;

        int uart_offset;

        int reg_shift;

        int (*init_fn)(struct pci_dev *dev, struct pci_board_no_ids *board,

                        int enable);

        int first_uart_offset;

};

static int __devinit siig10x_init_fn(struct pci_dev *dev, struct pci_board_no_ids *board, int enable)

{

        return pci_siig10x_fn(dev, NULL, enable);

}

static int __devinit siig20x_init_fn(struct pci_dev *dev, struct pci_board_no_ids *board, int enable)

{

        return pci_siig20x_fn(dev, NULL, enable);

}

static struct pci_board_no_ids pci_boards[] __devinitdata = {

        /*

         * PCI Flags, Number of Ports, Base (Maximum) Baud Rate,

         * Offset to get to next UART's registers,

         * Register shift to use for memory-mapped I/O,

         * Initialization function, first UART offset

         */

// Cards not tested are marked n/t

// If you have one of these cards and it works for you, please tell me..

/* titan_110l */        { SPCI_FL_BASE1 | SPCI_FL_BASE_TABLE, 1, 921600 },

/* titan_210l */        { SPCI_FL_BASE1 | SPCI_FL_BASE_TABLE, 2, 921600 },

/* avlab_1s1p (n/t) */  { SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },

/* avlab_1s1p_650 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },

/* avlab_1s1p_850 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },

/* avlab_1s2p (n/t) */  { SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },

/* avlab_1s2p_650 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },

/* avlab_1s2p_850 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },

/* avlab_2s1p (n/t) */  { SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 115200 },

/* avlab_2s1p_650 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 115200 },

/* avlab_2s1p_850 (nt)*/{ SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 115200 },

/* siig_1s1p_10x */     { SPCI_FL_BASE2, 1, 460800, 0, 0, siig10x_init_fn },

/* siig_2s1p_10x */     { SPCI_FL_BASE2, 1, 921600, 0, 0, siig10x_init_fn },

/* siig_2p1s_20x */     { SPCI_FL_BASE0, 1, 921600, 0, 0, siig20x_init_fn },

/* siig_1s1p_20x */     { SPCI_FL_BASE0, 1, 921600, 0, 0, siig20x_init_fn },

/* siig_2s1p_20x */     { SPCI_FL_BASE0, 1, 921600, 0, 0, siig20x_init_fn },

};

struct parport_serial_private {

        int num_ser;

        int line[20];

        struct pci_board_no_ids ser;

        int num_par;

        struct parport *port[PARPORT_MAX];

};

static int __devinit get_pci_port (struct pci_dev *dev,

                                   struct pci_board_no_ids *board,

                                   struct serial_struct *req,

                                   int idx)

{

        unsigned long port;

        int base_idx;

        int max_port;

        int offset;

        base_idx = SPCI_FL_GET_BASE(board->flags);

        if (board->flags & SPCI_FL_BASE_TABLE)

                base_idx += idx;

        if (board->flags & SPCI_FL_REGION_SZ_CAP) {

                max_port = pci_resource_len(dev, base_idx) / 8;

                if (idx >= max_port)

                        return 1;

        }

        offset = board->first_uart_offset;

        /* Timedia/SUNIX uses a mixture of BARs and offsets */

        /* Ugh, this is ugly as all hell --- TYT */

        if(dev->vendor == PCI_VENDOR_ID_TIMEDIA )  /* 0x1409 */

                switch(idx) {

                        case 0: base_idx=0;

                                break;

                        case 1: base_idx=0; offset=8;

                                break;

                        case 2: base_idx=1;

                                break;

                        case 3: base_idx=1; offset=8;

                                break;

                        case 4: /* BAR 2*/

                        case 5: /* BAR 3 */

                        case 6: /* BAR 4*/

                        case 7: base_idx=idx-2; /* BAR 5*/

                }

        port =  pci_resource_start(dev, base_idx) + offset;

        if ((board->flags & SPCI_FL_BASE_TABLE) == 0)

                port += idx * (board->uart_offset ? board->uart_offset : 8);

        if (pci_resource_flags (dev, base_idx) & IORESOURCE_IO) {

                int high_bits_offset = ((sizeof(long)-sizeof(int))*8);

                req->port = port;

                if (high_bits_offset)

                        req->port_high = port >> high_bits_offset;

                else

                        req->port_high = 0;

                return 0;

        }

        req->io_type = SERIAL_IO_MEM;

        req->iomem_base = ioremap(port, board->uart_offset);

        req->iomem_reg_shift = board->reg_shift;

        req->port = 0;

        return req->iomem_base ? 0 : 1;

}

/* Register the serial port(s) of a PCI card. */

static int __devinit serial_register (struct pci_dev *dev,

                                      const struct pci_device_id *id)

{

        struct pci_board_no_ids *board = &pci_boards[id->driver_data];

        struct parport_serial_private *priv = pci_get_drvdata (dev);

        struct serial_struct serial_req;

        int base_baud;

        int k;

        int success = 0;

        priv->ser = *board;

        if (board->init_fn && ((board->init_fn) (dev, board, 1) != 0))

                return 1;

        base_baud = board->base_baud;

        if (!base_baud)

                base_baud = BASE_BAUD;

        memset (&serial_req, 0, sizeof (serial_req));

        for (k = 0; k < board->num_ports; k++) {

                int line;

                serial_req.irq = dev->irq;

                if (get_pci_port (dev, board, &serial_req, k))

                        break;

                serial_req.flags = ASYNC_SKIP_TEST | ASYNC_AUTOPROBE;

                serial_req.baud_base = base_baud;

                line = register_serial (&serial_req);

                if (line < 0) {

                        printk (KERN_DEBUG

                                "parport_serial: register_serial failed\n");

                        continue;

                }

                priv->line[priv->num_ser++] = line;

                success = 1;

        }

        return success ? 0 : 1;

}

/* Register the parallel port(s) of a PCI card. */

static int __devinit parport_register (struct pci_dev *dev,

                                       const struct pci_device_id *id)

{

        struct parport_serial_private *priv = pci_get_drvdata (dev);

        int i = id->driver_data, n;

        int success = 0;

        if (cards[i].preinit_hook &&

            cards[i].preinit_hook (dev, PARPORT_IRQ_NONE, PARPORT_DMA_NONE))

                return -ENODEV;

        for (n = 0; n < cards[i].numports; n++) {

                struct parport *port;

                int lo = cards[i].addr[n].lo;

                int hi = cards[i].addr[n].hi;

                unsigned long io_lo, io_hi;

                io_lo = pci_resource_start (dev, lo);

                io_hi = 0;

                if ((hi >= 0) && (hi <= 6))

                        io_hi = pci_resource_start (dev, hi);

                else if (hi > 6)

                        io_lo += hi; /* Reinterpret the meaning of

                                        "hi" as an offset (see SYBA

                                        def.) */

                /* TODO: test if sharing interrupts works */

                printk (KERN_DEBUG "PCI parallel port detected: %04x:%04x, "

                        "I/O at %#lx(%#lx)\n",

                        parport_serial_pci_tbl[i].vendor,

                        parport_serial_pci_tbl[i].device, io_lo, io_hi);

                port = parport_pc_probe_port (io_lo, io_hi, PARPORT_IRQ_NONE,

                                              PARPORT_DMA_NONE, dev);

                if (port) {

                        priv->port[priv->num_par++] = port;

                        success = 1;

                }

        }

        if (cards[i].postinit_hook)

                cards[i].postinit_hook (dev, !success);

        return success ? 0 : 1;

}

static int __devinit parport_serial_pci_probe (struct pci_dev *dev,

                                               const struct pci_device_id *id)

{

        struct parport_serial_private *priv;

        int err;

        priv = kmalloc (sizeof *priv, GFP_KERNEL);

        if (!priv)

                return -ENOMEM;

        priv->num_ser = priv->num_par = 0;

        pci_set_drvdata (dev, priv);

        err = pci_enable_device (dev);

        if (err) {

                pci_set_drvdata (dev, NULL);

                kfree (priv);

                return err;

        }

        if (parport_register (dev, id)) {

                pci_set_drvdata (dev, NULL);

                kfree (priv);

                return -ENODEV;

        }

        if (serial_register (dev, id)) {

                int i;

                for (i = 0; i < priv->num_par; i++)

                        parport_pc_unregister_port (priv->port[i]);

                pci_set_drvdata (dev, NULL);

                kfree (priv);

                return -ENODEV;

        }

        return 0;

}

static void __devexit parport_serial_pci_remove (struct pci_dev *dev)

{

        struct parport_serial_private *priv = pci_get_drvdata (dev);

        int i;

        // Serial ports

        for (i = 0; i < priv->num_ser; i++) {

                unregister_serial (priv->line[i]);

                if (priv->ser.init_fn)

                        (priv->ser.init_fn) (dev, &priv->ser, 0);

        }

        pci_set_drvdata (dev, NULL);

        // Parallel ports

        for (i = 0; i < priv->num_par; i++)

                parport_pc_unregister_port (priv->port[i]);

        kfree (priv);

        return;

}

static struct pci_driver parport_serial_pci_driver = {

        name:           "parport_serial",

        id_table:       parport_serial_pci_tbl,

        probe:          parport_serial_pci_probe,

        remove:         __devexit_p(parport_serial_pci_remove),

};

static int __init parport_serial_init (void)

{

        return pci_module_init (&parport_serial_pci_driver);

}

static void __exit parport_serial_exit (void)

{

        pci_unregister_driver (&parport_serial_pci_driver);

        return;

}

MODULE_AUTHOR("Tim Waugh <twaugh@redhat.com>");

MODULE_DESCRIPTION("Driver for common parallel+serial multi-I/O PCI cards");

MODULE_LICENSE("GPL");

module_init(parport_serial_init);

module_exit(parport_serial_exit);