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5682ed33aa
Add sff_ prefix to SFF specific port ops. This rename is in preparation of separating SFF support out of libata core layer. This patch strictly renames ops and doesn't introduce any behavior difference. Signed-off-by: Tejun Heo <htejun@gmail.com>
283 lines
6.6 KiB
C
283 lines
6.6 KiB
C
/*
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* pata_winbond.c - Winbond VLB ATA controllers
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* (C) 2006 Red Hat <alan@redhat.com>
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*
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* Support for the Winbond 83759A when operating in advanced mode.
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* Multichip mode is not currently supported.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_host.h>
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#include <linux/libata.h>
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#include <linux/platform_device.h>
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#define DRV_NAME "pata_winbond"
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#define DRV_VERSION "0.0.3"
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#define NR_HOST 4 /* Two winbond controllers, two channels each */
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struct winbond_data {
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unsigned long config;
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struct platform_device *platform_dev;
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};
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static struct ata_host *winbond_host[NR_HOST];
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static struct winbond_data winbond_data[NR_HOST];
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static int nr_winbond_host;
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#ifdef MODULE
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static int probe_winbond = 1;
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#else
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static int probe_winbond;
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#endif
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static DEFINE_SPINLOCK(winbond_lock);
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static void winbond_writecfg(unsigned long port, u8 reg, u8 val)
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{
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unsigned long flags;
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spin_lock_irqsave(&winbond_lock, flags);
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outb(reg, port + 0x01);
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outb(val, port + 0x02);
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spin_unlock_irqrestore(&winbond_lock, flags);
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}
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static u8 winbond_readcfg(unsigned long port, u8 reg)
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{
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u8 val;
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unsigned long flags;
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spin_lock_irqsave(&winbond_lock, flags);
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outb(reg, port + 0x01);
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val = inb(port + 0x02);
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spin_unlock_irqrestore(&winbond_lock, flags);
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return val;
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}
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static void winbond_set_piomode(struct ata_port *ap, struct ata_device *adev)
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{
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struct ata_timing t;
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struct winbond_data *winbond = ap->host->private_data;
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int active, recovery;
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u8 reg;
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int timing = 0x88 + (ap->port_no * 4) + (adev->devno * 2);
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reg = winbond_readcfg(winbond->config, 0x81);
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/* Get the timing data in cycles */
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if (reg & 0x40) /* Fast VLB bus, assume 50MHz */
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ata_timing_compute(adev, adev->pio_mode, &t, 20000, 1000);
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else
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ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
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active = (FIT(t.active, 3, 17) - 1) & 0x0F;
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recovery = (FIT(t.recover, 1, 15) + 1) & 0x0F;
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timing = (active << 4) | recovery;
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winbond_writecfg(winbond->config, timing, reg);
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/* Load the setup timing */
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reg = 0x35;
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if (adev->class != ATA_DEV_ATA)
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reg |= 0x08; /* FIFO off */
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if (!ata_pio_need_iordy(adev))
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reg |= 0x02; /* IORDY off */
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reg |= (FIT(t.setup, 0, 3) << 6);
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winbond_writecfg(winbond->config, timing + 1, reg);
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}
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static unsigned int winbond_data_xfer(struct ata_device *dev,
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unsigned char *buf, unsigned int buflen, int rw)
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{
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struct ata_port *ap = dev->link->ap;
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int slop = buflen & 3;
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if (ata_id_has_dword_io(dev->id)) {
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if (rw == READ)
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ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
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else
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iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
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if (unlikely(slop)) {
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u32 pad;
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if (rw == READ) {
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pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
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memcpy(buf + buflen - slop, &pad, slop);
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} else {
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memcpy(&pad, buf + buflen - slop, slop);
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iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
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}
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buflen += 4 - slop;
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}
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} else
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buflen = ata_sff_data_xfer(dev, buf, buflen, rw);
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return buflen;
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}
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static struct scsi_host_template winbond_sht = {
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ATA_PIO_SHT(DRV_NAME),
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};
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static struct ata_port_operations winbond_port_ops = {
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.inherits = &ata_sff_port_ops,
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.sff_data_xfer = winbond_data_xfer,
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.cable_detect = ata_cable_40wire,
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.set_piomode = winbond_set_piomode,
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};
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/**
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* winbond_init_one - attach a winbond interface
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* @type: Type to display
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* @io: I/O port start
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* @irq: interrupt line
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* @fast: True if on a > 33Mhz VLB
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*
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* Register a VLB bus IDE interface. Such interfaces are PIO and we
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* assume do not support IRQ sharing.
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*/
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static __init int winbond_init_one(unsigned long port)
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{
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struct platform_device *pdev;
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u8 reg;
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int i, rc;
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reg = winbond_readcfg(port, 0x81);
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reg |= 0x80; /* jumpered mode off */
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winbond_writecfg(port, 0x81, reg);
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reg = winbond_readcfg(port, 0x83);
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reg |= 0xF0; /* local control */
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winbond_writecfg(port, 0x83, reg);
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reg = winbond_readcfg(port, 0x85);
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reg |= 0xF0; /* programmable timing */
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winbond_writecfg(port, 0x85, reg);
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reg = winbond_readcfg(port, 0x81);
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if (!(reg & 0x03)) /* Disabled */
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return -ENODEV;
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for (i = 0; i < 2 ; i ++) {
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unsigned long cmd_port = 0x1F0 - (0x80 * i);
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unsigned long ctl_port = cmd_port + 0x206;
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struct ata_host *host;
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struct ata_port *ap;
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void __iomem *cmd_addr, *ctl_addr;
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if (!(reg & (1 << i)))
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continue;
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pdev = platform_device_register_simple(DRV_NAME, nr_winbond_host, NULL, 0);
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if (IS_ERR(pdev))
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return PTR_ERR(pdev);
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rc = -ENOMEM;
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host = ata_host_alloc(&pdev->dev, 1);
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if (!host)
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goto err_unregister;
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ap = host->ports[0];
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rc = -ENOMEM;
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cmd_addr = devm_ioport_map(&pdev->dev, cmd_port, 8);
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ctl_addr = devm_ioport_map(&pdev->dev, ctl_port, 1);
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if (!cmd_addr || !ctl_addr)
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goto err_unregister;
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ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", cmd_port, ctl_port);
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ap->ops = &winbond_port_ops;
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ap->pio_mask = 0x1F;
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ap->flags |= ATA_FLAG_SLAVE_POSS;
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ap->ioaddr.cmd_addr = cmd_addr;
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ap->ioaddr.altstatus_addr = ctl_addr;
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ap->ioaddr.ctl_addr = ctl_addr;
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ata_sff_std_ports(&ap->ioaddr);
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/* hook in a private data structure per channel */
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host->private_data = &winbond_data[nr_winbond_host];
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winbond_data[nr_winbond_host].config = port;
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winbond_data[nr_winbond_host].platform_dev = pdev;
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/* activate */
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rc = ata_host_activate(host, 14 + i, ata_sff_interrupt, 0,
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&winbond_sht);
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if (rc)
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goto err_unregister;
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winbond_host[nr_winbond_host++] = dev_get_drvdata(&pdev->dev);
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}
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return 0;
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err_unregister:
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platform_device_unregister(pdev);
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return rc;
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}
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/**
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* winbond_init - attach winbond interfaces
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*
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* Attach winbond IDE interfaces by scanning the ports it may occupy.
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*/
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static __init int winbond_init(void)
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{
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static const unsigned long config[2] = { 0x130, 0x1B0 };
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int ct = 0;
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int i;
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if (probe_winbond == 0)
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return -ENODEV;
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/*
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* Check both base addresses
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*/
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for (i = 0; i < 2; i++) {
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if (probe_winbond & (1<<i)) {
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int ret = 0;
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unsigned long port = config[i];
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if (request_region(port, 2, "pata_winbond")) {
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ret = winbond_init_one(port);
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if (ret <= 0)
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release_region(port, 2);
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else ct+= ret;
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}
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}
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}
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if (ct != 0)
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return 0;
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return -ENODEV;
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}
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static __exit void winbond_exit(void)
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{
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int i;
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for (i = 0; i < nr_winbond_host; i++) {
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ata_host_detach(winbond_host[i]);
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release_region(winbond_data[i].config, 2);
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platform_device_unregister(winbond_data[i].platform_dev);
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}
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for Winbond VL ATA");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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module_init(winbond_init);
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module_exit(winbond_exit);
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module_param(probe_winbond, int, 0);
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