memstick: fix hangs on unexpected device removal in mspro_blk

[linux/fpc-iii.git] / drivers / ata / pata_pcmcia.c

/*
 *   pata_pcmcia.c - PCMCIA PATA controller driver.
 *   Copyright 2005-2006 Red Hat Inc, all rights reserved.
 *   PCMCIA ident update Copyright 2006 Marcin Juszkiewicz
 *                                              <openembedded@hrw.one.pl>
 *
 *  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 WARRANTY; 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; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *   Heavily based upon ide-cs.c
 *   The initial developer of the original code is David A. Hinds
 *   <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 *   are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/delay.h>
#include <scsi/scsi_host.h>
#include <linux/ata.h>
#include <linux/libata.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ciscode.h>


#define DRV_NAME "pata_pcmcia"
#define DRV_VERSION "0.3.5"

/*
 *      Private data structure to glue stuff together
 */

struct ata_pcmcia_info {
        struct pcmcia_device *pdev;
        int             ndev;
        dev_node_t      node;
};

/**
 *      pcmcia_set_mode -       PCMCIA specific mode setup
 *      @link: link
 *      @r_failed_dev: Return pointer for failed device
 *
 *      Perform the tuning and setup of the devices and timings, which
 *      for PCMCIA is the same as any other controller. We wrap it however
 *      as we need to spot hardware with incorrect or missing master/slave
 *      decode, which alas is embarrassingly common in the PC world
 */

static int pcmcia_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
{
        struct ata_device *master = &link->device[0];
        struct ata_device *slave = &link->device[1];

        if (!ata_dev_enabled(master) || !ata_dev_enabled(slave))
                return ata_do_set_mode(link, r_failed_dev);

        if (memcmp(master->id + ATA_ID_FW_REV,  slave->id + ATA_ID_FW_REV,
                           ATA_ID_FW_REV_LEN + ATA_ID_PROD_LEN) == 0) {
                /* Suspicious match, but could be two cards from
                   the same vendor - check serial */
                if (memcmp(master->id + ATA_ID_SERNO, slave->id + ATA_ID_SERNO,
                           ATA_ID_SERNO_LEN) == 0 && master->id[ATA_ID_SERNO] >> 8) {
                        ata_dev_printk(slave, KERN_WARNING, "is a ghost device, ignoring.\n");
                        ata_dev_disable(slave);
                }
        }
        return ata_do_set_mode(link, r_failed_dev);
}

/**
 *      pcmcia_set_mode_8bit    -       PCMCIA specific mode setup
 *      @link: link
 *      @r_failed_dev: Return pointer for failed device
 *
 *      For the simple emulated 8bit stuff the less we do the better.
 */

static int pcmcia_set_mode_8bit(struct ata_link *link,
                                struct ata_device **r_failed_dev)
{
        return 0;
}

/**
 *      ata_data_xfer_8bit       -      Transfer data by 8bit PIO
 *      @dev: device to target
 *      @buf: data buffer
 *      @buflen: buffer length
 *      @rw: read/write
 *
 *      Transfer data from/to the device data register by 8 bit PIO.
 *
 *      LOCKING:
 *      Inherited from caller.
 */

static unsigned int ata_data_xfer_8bit(struct ata_device *dev,
                                unsigned char *buf, unsigned int buflen, int rw)
{
        struct ata_port *ap = dev->link->ap;

        if (rw == READ)
                ioread8_rep(ap->ioaddr.data_addr, buf, buflen);
        else
                iowrite8_rep(ap->ioaddr.data_addr, buf, buflen);

        return buflen;
}

/**
 *      pcmcia_8bit_drain_fifo - Stock FIFO drain logic for SFF controllers
 *      @qc: command
 *
 *      Drain the FIFO and device of any stuck data following a command
 *      failing to complete. In some cases this is neccessary before a
 *      reset will recover the device.
 *
 */
 
void pcmcia_8bit_drain_fifo(struct ata_queued_cmd *qc)
{
        int count;
        struct ata_port *ap;

        /* We only need to flush incoming data when a command was running */
        if (qc == NULL || qc->dma_dir == DMA_TO_DEVICE)
                return;

        ap = qc->ap;

        /* Drain up to 64K of data before we give up this recovery method */
        for (count = 0; (ap->ops->sff_check_status(ap) & ATA_DRQ)
                                                        && count++ < 65536;)
                ioread8(ap->ioaddr.data_addr);

        if (count)
                ata_port_printk(ap, KERN_WARNING, "drained %d bytes to clear DRQ.\n",
                                                                count);

}

static struct scsi_host_template pcmcia_sht = {
        ATA_PIO_SHT(DRV_NAME),
};

static struct ata_port_operations pcmcia_port_ops = {
        .inherits       = &ata_sff_port_ops,
        .sff_data_xfer  = ata_sff_data_xfer_noirq,
        .cable_detect   = ata_cable_40wire,
        .set_mode       = pcmcia_set_mode,
};

static struct ata_port_operations pcmcia_8bit_port_ops = {
        .inherits       = &ata_sff_port_ops,
        .sff_data_xfer  = ata_data_xfer_8bit,
        .cable_detect   = ata_cable_40wire,
        .set_mode       = pcmcia_set_mode_8bit,
        .drain_fifo     = pcmcia_8bit_drain_fifo,
};

#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)


struct pcmcia_config_check {
        unsigned long ctl_base;
        int skip_vcc;
        int is_kme;
};

static int pcmcia_check_one_config(struct pcmcia_device *pdev,
                                   cistpl_cftable_entry_t *cfg,
                                   cistpl_cftable_entry_t *dflt,
                                   unsigned int vcc,
                                   void *priv_data)
{
        struct pcmcia_config_check *stk = priv_data;

        /* Check for matching Vcc, unless we're desperate */
        if (!stk->skip_vcc) {
                if (cfg->vcc.present & (1 << CISTPL_POWER_VNOM)) {
                        if (vcc != cfg->vcc.param[CISTPL_POWER_VNOM] / 10000)
                                return -ENODEV;
                } else if (dflt->vcc.present & (1 << CISTPL_POWER_VNOM)) {
                        if (vcc != dflt->vcc.param[CISTPL_POWER_VNOM] / 10000)
                                return -ENODEV;
                }
        }

        if (cfg->vpp1.present & (1 << CISTPL_POWER_VNOM))
                pdev->conf.Vpp = cfg->vpp1.param[CISTPL_POWER_VNOM] / 10000;
        else if (dflt->vpp1.present & (1 << CISTPL_POWER_VNOM))
                pdev->conf.Vpp = dflt->vpp1.param[CISTPL_POWER_VNOM] / 10000;

        if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
                cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
                pdev->io.BasePort1 = io->win[0].base;
                pdev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
                if (!(io->flags & CISTPL_IO_16BIT))
                        pdev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
                if (io->nwin == 2) {
                        pdev->io.NumPorts1 = 8;
                        pdev->io.BasePort2 = io->win[1].base;
                        pdev->io.NumPorts2 = (stk->is_kme) ? 2 : 1;
                        if (pcmcia_request_io(pdev, &pdev->io) != 0)
                                return -ENODEV;
                        stk->ctl_base = pdev->io.BasePort2;
                } else if ((io->nwin == 1) && (io->win[0].len >= 16)) {
                        pdev->io.NumPorts1 = io->win[0].len;
                        pdev->io.NumPorts2 = 0;
                        if (pcmcia_request_io(pdev, &pdev->io) != 0)
                                return -ENODEV;
                        stk->ctl_base = pdev->io.BasePort1 + 0x0e;
                } else
                        return -ENODEV;
                /* If we've got this far, we're done */
                return 0;
        }
        return -ENODEV;
}

/**
 *      pcmcia_init_one         -       attach a PCMCIA interface
 *      @pdev: pcmcia device
 *
 *      Register a PCMCIA IDE interface. Such interfaces are PIO 0 and
 *      shared IRQ.
 */

static int pcmcia_init_one(struct pcmcia_device *pdev)
{
        struct ata_host *host;
        struct ata_port *ap;
        struct ata_pcmcia_info *info;
        struct pcmcia_config_check *stk = NULL;
        int last_ret = 0, last_fn = 0, is_kme = 0, ret = -ENOMEM, p;
        unsigned long io_base, ctl_base;
        void __iomem *io_addr, *ctl_addr;
        int n_ports = 1;
        struct ata_port_operations *ops = &pcmcia_port_ops;

        info = kzalloc(sizeof(*info), GFP_KERNEL);
        if (info == NULL)
                return -ENOMEM;

        /* Glue stuff together. FIXME: We may be able to get rid of info with care */
        info->pdev = pdev;
        pdev->priv = info;

        /* Set up attributes in order to probe card and get resources */
        pdev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
        pdev->io.Attributes2 = IO_DATA_PATH_WIDTH_8;
        pdev->io.IOAddrLines = 3;
        pdev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING;
        pdev->irq.IRQInfo1 = IRQ_LEVEL_ID;
        pdev->conf.Attributes = CONF_ENABLE_IRQ;
        pdev->conf.IntType = INT_MEMORY_AND_IO;

        /* See if we have a manufacturer identifier. Use it to set is_kme for
           vendor quirks */
        is_kme = ((pdev->manf_id == MANFID_KME) &&
                  ((pdev->card_id == PRODID_KME_KXLC005_A) ||
                   (pdev->card_id == PRODID_KME_KXLC005_B)));

        /* Allocate resoure probing structures */

        stk = kzalloc(sizeof(*stk), GFP_KERNEL);
        if (!stk)
                goto out1;
        stk->is_kme = is_kme;
        stk->skip_vcc = io_base = ctl_base = 0;

        if (pcmcia_loop_config(pdev, pcmcia_check_one_config, stk)) {
                stk->skip_vcc = 1;
                if (pcmcia_loop_config(pdev, pcmcia_check_one_config, stk))
                        goto failed; /* No suitable config found */
        }
        io_base = pdev->io.BasePort1;
        ctl_base = stk->ctl_base;
        CS_CHECK(RequestIRQ, pcmcia_request_irq(pdev, &pdev->irq));
        CS_CHECK(RequestConfiguration, pcmcia_request_configuration(pdev, &pdev->conf));

        /* iomap */
        ret = -ENOMEM;
        io_addr = devm_ioport_map(&pdev->dev, io_base, 8);
        ctl_addr = devm_ioport_map(&pdev->dev, ctl_base, 1);
        if (!io_addr || !ctl_addr)
                goto failed;

        /* Success. Disable the IRQ nIEN line, do quirks */
        iowrite8(0x02, ctl_addr);
        if (is_kme)
                iowrite8(0x81, ctl_addr + 0x01);

        /* FIXME: Could be more ports at base + 0x10 but we only deal with
           one right now */
        if (pdev->io.NumPorts1 >= 0x20)
                n_ports = 2;

        if (pdev->manf_id == 0x0097 && pdev->card_id == 0x1620)
                ops = &pcmcia_8bit_port_ops;
        /*
         *      Having done the PCMCIA plumbing the ATA side is relatively
         *      sane.
         */
        ret = -ENOMEM;
        host = ata_host_alloc(&pdev->dev, n_ports);
        if (!host)
                goto failed;

        for (p = 0; p < n_ports; p++) {
                ap = host->ports[p];

                ap->ops = ops;
                ap->pio_mask = ATA_PIO0;        /* ISA so PIO 0 cycles */
                ap->flags |= ATA_FLAG_SLAVE_POSS;
                ap->ioaddr.cmd_addr = io_addr + 0x10 * p;
                ap->ioaddr.altstatus_addr = ctl_addr + 0x10 * p;
                ap->ioaddr.ctl_addr = ctl_addr + 0x10 * p;
                ata_sff_std_ports(&ap->ioaddr);

                ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", io_base, ctl_base);
        }

        /* activate */
        ret = ata_host_activate(host, pdev->irq.AssignedIRQ, ata_sff_interrupt,
                                IRQF_SHARED, &pcmcia_sht);
        if (ret)
                goto failed;

        info->ndev = 1;
        kfree(stk);
        return 0;

cs_failed:
        cs_error(pdev, last_fn, last_ret);
failed:
        kfree(stk);
        info->ndev = 0;
        pcmcia_disable_device(pdev);
out1:
        kfree(info);
        return ret;
}

/**
 *      pcmcia_remove_one       -       unplug an pcmcia interface
 *      @pdev: pcmcia device
 *
 *      A PCMCIA ATA device has been unplugged. Perform the needed
 *      cleanup. Also called on module unload for any active devices.
 */

static void pcmcia_remove_one(struct pcmcia_device *pdev)
{
        struct ata_pcmcia_info *info = pdev->priv;
        struct device *dev = &pdev->dev;

        if (info != NULL) {
                /* If we have attached the device to the ATA layer, detach it */
                if (info->ndev) {
                        struct ata_host *host = dev_get_drvdata(dev);
                        ata_host_detach(host);
                }
                info->ndev = 0;
                pdev->priv = NULL;
        }
        pcmcia_disable_device(pdev);
        kfree(info);
}

static struct pcmcia_device_id pcmcia_devices[] = {
        PCMCIA_DEVICE_FUNC_ID(4),
        PCMCIA_DEVICE_MANF_CARD(0x0000, 0x0000),        /* Corsair */
        PCMCIA_DEVICE_MANF_CARD(0x0007, 0x0000),        /* Hitachi */
        PCMCIA_DEVICE_MANF_CARD(0x000a, 0x0000),        /* I-O Data CFA */
        PCMCIA_DEVICE_MANF_CARD(0x001c, 0x0001),        /* Mitsubishi CFA */
        PCMCIA_DEVICE_MANF_CARD(0x0032, 0x0704),
        PCMCIA_DEVICE_MANF_CARD(0x0032, 0x2904),
        PCMCIA_DEVICE_MANF_CARD(0x0045, 0x0401),        /* SanDisk CFA */
        PCMCIA_DEVICE_MANF_CARD(0x004f, 0x0000),        /* Kingston */
        PCMCIA_DEVICE_MANF_CARD(0x0097, 0x1620),        /* TI emulated */
        PCMCIA_DEVICE_MANF_CARD(0x0098, 0x0000),        /* Toshiba */
        PCMCIA_DEVICE_MANF_CARD(0x00a4, 0x002d),
        PCMCIA_DEVICE_MANF_CARD(0x00ce, 0x0000),        /* Samsung */
        PCMCIA_DEVICE_MANF_CARD(0x0319, 0x0000),        /* Hitachi */
        PCMCIA_DEVICE_MANF_CARD(0x2080, 0x0001),
        PCMCIA_DEVICE_MANF_CARD(0x4e01, 0x0100),        /* Viking CFA */
        PCMCIA_DEVICE_MANF_CARD(0x4e01, 0x0200),        /* Lexar, Viking CFA */
        PCMCIA_DEVICE_PROD_ID123("Caravelle", "PSC-IDE ", "PSC000", 0x8c36137c, 0xd0693ab8, 0x2768a9f0),
        PCMCIA_DEVICE_PROD_ID123("CDROM", "IDE", "MCD-601p", 0x1b9179ca, 0xede88951, 0x0d902f74),
        PCMCIA_DEVICE_PROD_ID123("PCMCIA", "IDE CARD", "F1", 0x281f1c5d, 0x1907960c, 0xf7fde8b9),
        PCMCIA_DEVICE_PROD_ID12("ARGOSY", "CD-ROM", 0x78f308dc, 0x66536591),
        PCMCIA_DEVICE_PROD_ID12("ARGOSY", "PnPIDE", 0x78f308dc, 0x0c694728),
        PCMCIA_DEVICE_PROD_ID12("CNF   ", "CD-ROM", 0x46d7db81, 0x66536591),
        PCMCIA_DEVICE_PROD_ID12("CNF CD-M", "CD-ROM", 0x7d93b852, 0x66536591),
        PCMCIA_DEVICE_PROD_ID12("Creative Technology Ltd.", "PCMCIA CD-ROM Interface Card", 0xff8c8a45, 0xfe8020c4),
        PCMCIA_DEVICE_PROD_ID12("Digital Equipment Corporation.", "Digital Mobile Media CD-ROM", 0x17692a66, 0xef1dcbde),
        PCMCIA_DEVICE_PROD_ID12("EXP", "CD+GAME", 0x6f58c983, 0x63c13aaf),
        PCMCIA_DEVICE_PROD_ID12("EXP   ", "CD-ROM", 0x0a5c52fd, 0x66536591),
        PCMCIA_DEVICE_PROD_ID12("EXP   ", "PnPIDE", 0x0a5c52fd, 0x0c694728),
        PCMCIA_DEVICE_PROD_ID12("FREECOM", "PCCARD-IDE", 0x5714cbf7, 0x48e0ab8e),
        PCMCIA_DEVICE_PROD_ID12("HITACHI", "FLASH", 0xf4f43949, 0x9eb86aae),
        PCMCIA_DEVICE_PROD_ID12("HITACHI", "microdrive", 0xf4f43949, 0xa6d76178),
        PCMCIA_DEVICE_PROD_ID12("Hyperstone", "Model1", 0x3d5b9ef5, 0xca6ab420),
        PCMCIA_DEVICE_PROD_ID12("IBM", "microdrive", 0xb569a6e5, 0xa6d76178),
        PCMCIA_DEVICE_PROD_ID12("IBM", "IBM17JSSFP20", 0xb569a6e5, 0xf2508753),
        PCMCIA_DEVICE_PROD_ID12("KINGSTON", "CF8GB", 0x2e6d1829, 0xacbe682e),
        PCMCIA_DEVICE_PROD_ID12("IO DATA", "CBIDE2      ", 0x547e66dc, 0x8671043b),
        PCMCIA_DEVICE_PROD_ID12("IO DATA", "PCIDE", 0x547e66dc, 0x5c5ab149),
        PCMCIA_DEVICE_PROD_ID12("IO DATA", "PCIDEII", 0x547e66dc, 0xb3662674),
        PCMCIA_DEVICE_PROD_ID12("LOOKMEET", "CBIDE2      ", 0xe37be2b5, 0x8671043b),
        PCMCIA_DEVICE_PROD_ID12("M-Systems", "CF300", 0x7ed2ad87, 0x7e9e78ee),
        PCMCIA_DEVICE_PROD_ID12("M-Systems", "CF500", 0x7ed2ad87, 0x7a13045c),
        PCMCIA_DEVICE_PROD_ID2("NinjaATA-", 0xebe0bd79),
        PCMCIA_DEVICE_PROD_ID12("PCMCIA", "CD-ROM", 0x281f1c5d, 0x66536591),
        PCMCIA_DEVICE_PROD_ID12("PCMCIA", "PnPIDE", 0x281f1c5d, 0x0c694728),
        PCMCIA_DEVICE_PROD_ID12("SHUTTLE TECHNOLOGY LTD.", "PCCARD-IDE/ATAPI Adapter", 0x4a3f0ba0, 0x322560e1),
        PCMCIA_DEVICE_PROD_ID12("SEAGATE", "ST1", 0x87c1b330, 0xe1f30883),
        PCMCIA_DEVICE_PROD_ID12("SAMSUNG", "04/05/06", 0x43d74cb4, 0x6a22777d),
        PCMCIA_DEVICE_PROD_ID12("SMI VENDOR", "SMI PRODUCT", 0x30896c92, 0x703cc5f6),
        PCMCIA_DEVICE_PROD_ID12("TOSHIBA", "MK2001MPL", 0xb4585a1a, 0x3489e003),
        PCMCIA_DEVICE_PROD_ID1("TRANSCEND    512M   ", 0xd0909443),
        PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS1GCF45", 0x709b1bf1, 0xf68b6f32),
        PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS1GCF80", 0x709b1bf1, 0x2a54d4b1),
        PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS2GCF120", 0x709b1bf1, 0x969aa4f2),
        PCMCIA_DEVICE_PROD_ID12("TRANSCEND", "TS4GCF120", 0x709b1bf1, 0xf54a91c8),
        PCMCIA_DEVICE_PROD_ID12("WIT", "IDE16", 0x244e5994, 0x3e232852),
        PCMCIA_DEVICE_PROD_ID12("WEIDA", "TWTTI", 0xcc7cf69c, 0x212bb918),
        PCMCIA_DEVICE_PROD_ID1("STI Flash", 0xe4a13209),
        PCMCIA_DEVICE_PROD_ID12("STI", "Flash 5.0", 0xbf2df18d, 0x8cb57a0e),
        PCMCIA_MFC_DEVICE_PROD_ID12(1, "SanDisk", "ConnectPlus", 0x7a954bd9, 0x74be00c6),
        PCMCIA_DEVICE_PROD_ID2("Flash Card", 0x5a362506),
        PCMCIA_DEVICE_NULL,
};

MODULE_DEVICE_TABLE(pcmcia, pcmcia_devices);

static struct pcmcia_driver pcmcia_driver = {
        .owner          = THIS_MODULE,
        .drv = {
                .name           = DRV_NAME,
        },
        .id_table       = pcmcia_devices,
        .probe          = pcmcia_init_one,
        .remove         = pcmcia_remove_one,
};

static int __init pcmcia_init(void)
{
        return pcmcia_register_driver(&pcmcia_driver);
}

static void __exit pcmcia_exit(void)
{
        pcmcia_unregister_driver(&pcmcia_driver);
}

MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for PCMCIA ATA");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

module_init(pcmcia_init);
module_exit(pcmcia_exit);