[SERIAL] Expose 8250_pci setup/removal/suspend/resume functions
Re-jig the setup/removal/suspend/resume of 8250 pci ports so that they know slightly less about how they're attached to a PCI device. Expose this as the new interface for registering PCI serial ports, as well as the pciserial_board structure and associated flag definitions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
Russell King
Родитель
70db3d91a5
Коммит
241fc4367b
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@ -33,38 +33,6 @@
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#undef SERIAL_DEBUG_PCI
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/*
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* Definitions for PCI support.
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*/
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#define FL_BASE_MASK 0x0007
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#define FL_BASE0 0x0000
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#define FL_BASE1 0x0001
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#define FL_BASE2 0x0002
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#define FL_BASE3 0x0003
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#define FL_BASE4 0x0004
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#define FL_GET_BASE(x) (x & FL_BASE_MASK)
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/* Use successive BARs (PCI base address registers),
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else use offset into some specified BAR */
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#define FL_BASE_BARS 0x0008
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/* do not assign an irq */
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#define FL_NOIRQ 0x0080
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/* Use the Base address register size to cap number of ports */
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#define FL_REGION_SZ_CAP 0x0100
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struct pciserial_board {
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unsigned int flags;
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unsigned int num_ports;
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unsigned int base_baud;
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unsigned int uart_offset;
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unsigned int reg_shift;
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unsigned int first_offset;
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};
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struct serial_private;
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/*
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* init function returns:
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* > 0 - number of ports
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@ -1528,6 +1496,137 @@ serial_pci_matches(struct pciserial_board *board,
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board->first_offset == guessed->first_offset;
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}
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struct serial_private *
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pciserial_init_ports(struct pci_dev *dev, struct pciserial_board *board)
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{
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struct uart_port serial_port;
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struct serial_private *priv;
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struct pci_serial_quirk *quirk;
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int rc, nr_ports, i;
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nr_ports = board->num_ports;
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/*
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* Find an init and setup quirks.
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*/
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quirk = find_quirk(dev);
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/*
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* Run the new-style initialization function.
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* The initialization function returns:
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* <0 - error
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* 0 - use board->num_ports
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* >0 - number of ports
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*/
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if (quirk->init) {
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rc = quirk->init(dev);
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if (rc < 0) {
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priv = ERR_PTR(rc);
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goto err_out;
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}
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if (rc)
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nr_ports = rc;
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}
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priv = kmalloc(sizeof(struct serial_private) +
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sizeof(unsigned int) * nr_ports,
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GFP_KERNEL);
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if (!priv) {
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priv = ERR_PTR(-ENOMEM);
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goto err_deinit;
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}
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memset(priv, 0, sizeof(struct serial_private) +
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sizeof(unsigned int) * nr_ports);
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priv->dev = dev;
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priv->quirk = quirk;
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memset(&serial_port, 0, sizeof(struct uart_port));
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serial_port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
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serial_port.uartclk = board->base_baud * 16;
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serial_port.irq = get_pci_irq(dev, board);
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serial_port.dev = &dev->dev;
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for (i = 0; i < nr_ports; i++) {
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if (quirk->setup(priv, board, &serial_port, i))
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break;
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#ifdef SERIAL_DEBUG_PCI
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printk("Setup PCI port: port %x, irq %d, type %d\n",
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serial_port.iobase, serial_port.irq, serial_port.iotype);
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#endif
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priv->line[i] = serial8250_register_port(&serial_port);
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if (priv->line[i] < 0) {
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printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), priv->line[i]);
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break;
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}
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}
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priv->nr = i;
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return priv;
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err_deinit:
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if (quirk->exit)
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quirk->exit(dev);
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err_out:
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return priv;
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}
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EXPORT_SYMBOL_GPL(pciserial_init_ports);
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void pciserial_remove_ports(struct serial_private *priv)
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{
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struct pci_serial_quirk *quirk;
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int i;
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for (i = 0; i < priv->nr; i++)
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serial8250_unregister_port(priv->line[i]);
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for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) {
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if (priv->remapped_bar[i])
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iounmap(priv->remapped_bar[i]);
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priv->remapped_bar[i] = NULL;
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}
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/*
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* Find the exit quirks.
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*/
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quirk = find_quirk(priv->dev);
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if (quirk->exit)
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quirk->exit(priv->dev);
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kfree(priv);
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}
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EXPORT_SYMBOL_GPL(pciserial_remove_ports);
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void pciserial_suspend_ports(struct serial_private *priv)
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{
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int i;
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for (i = 0; i < priv->nr; i++)
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if (priv->line[i] >= 0)
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serial8250_suspend_port(priv->line[i]);
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}
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EXPORT_SYMBOL_GPL(pciserial_suspend_ports);
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void pciserial_resume_ports(struct serial_private *priv)
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{
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int i;
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/*
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* Ensure that the board is correctly configured.
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*/
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if (priv->quirk->init)
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priv->quirk->init(priv->dev);
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for (i = 0; i < priv->nr; i++)
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if (priv->line[i] >= 0)
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serial8250_resume_port(priv->line[i]);
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}
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EXPORT_SYMBOL_GPL(pciserial_resume_ports);
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/*
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* Probe one serial board. Unfortunately, there is no rhyme nor reason
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* to the arrangement of serial ports on a PCI card.
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@ -1535,11 +1634,9 @@ serial_pci_matches(struct pciserial_board *board,
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static int __devinit
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pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
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{
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struct uart_port serial_port;
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struct serial_private *priv;
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struct pciserial_board *board, tmp;
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struct pci_serial_quirk *quirk;
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int rc, nr_ports, i;
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int rc;
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if (ent->driver_data >= ARRAY_SIZE(pci_boards)) {
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printk(KERN_ERR "pci_init_one: invalid driver_data: %ld\n",
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@ -1582,72 +1679,14 @@ pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
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dev);
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}
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nr_ports = board->num_ports;
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/*
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* Find an init and setup quirks.
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*/
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quirk = find_quirk(dev);
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/*
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* Run the new-style initialization function.
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* The initialization function returns:
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* <0 - error
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* 0 - use board->num_ports
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* >0 - number of ports
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*/
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if (quirk->init) {
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rc = quirk->init(dev);
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if (rc < 0)
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goto disable;
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if (rc)
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nr_ports = rc;
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priv = pciserial_init_ports(dev, board);
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if (!IS_ERR(priv)) {
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pci_set_drvdata(dev, priv);
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return 0;
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}
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priv = kmalloc(sizeof(struct serial_private) +
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sizeof(unsigned int) * nr_ports,
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GFP_KERNEL);
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if (!priv) {
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rc = -ENOMEM;
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goto deinit;
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}
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rc = PTR_ERR(priv);
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memset(priv, 0, sizeof(struct serial_private) +
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sizeof(unsigned int) * nr_ports);
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priv->dev = dev;
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priv->quirk = quirk;
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pci_set_drvdata(dev, priv);
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memset(&serial_port, 0, sizeof(struct uart_port));
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serial_port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
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serial_port.uartclk = board->base_baud * 16;
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serial_port.irq = get_pci_irq(dev, board);
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serial_port.dev = &dev->dev;
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for (i = 0; i < nr_ports; i++) {
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if (quirk->setup(priv, board, &serial_port, i))
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break;
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#ifdef SERIAL_DEBUG_PCI
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printk("Setup PCI port: port %x, irq %d, type %d\n",
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serial_port.iobase, serial_port.irq, serial_port.iotype);
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#endif
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priv->line[i] = serial8250_register_port(&serial_port);
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if (priv->line[i] < 0) {
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printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), priv->line[i]);
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break;
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}
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}
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priv->nr = i;
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return 0;
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deinit:
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if (quirk->exit)
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quirk->exit(dev);
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disable:
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pci_disable_device(dev);
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return rc;
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@ -1656,42 +1695,21 @@ pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
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static void __devexit pciserial_remove_one(struct pci_dev *dev)
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{
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struct serial_private *priv = pci_get_drvdata(dev);
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struct pci_serial_quirk *quirk;
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int i;
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pci_set_drvdata(dev, NULL);
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for (i = 0; i < priv->nr; i++)
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serial8250_unregister_port(priv->line[i]);
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for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) {
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if (priv->remapped_bar[i])
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iounmap(priv->remapped_bar[i]);
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priv->remapped_bar[i] = NULL;
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}
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/*
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* Find the exit quirks.
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*/
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quirk = find_quirk(dev);
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if (quirk->exit)
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quirk->exit(dev);
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pciserial_remove_ports(priv);
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pci_disable_device(dev);
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kfree(priv);
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}
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static int pciserial_suspend_one(struct pci_dev *dev, pm_message_t state)
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{
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struct serial_private *priv = pci_get_drvdata(dev);
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if (priv) {
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int i;
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if (priv)
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pciserial_suspend_ports(priv);
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for (i = 0; i < priv->nr; i++)
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serial8250_suspend_port(priv->line[i]);
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}
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pci_save_state(dev);
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pci_set_power_state(dev, pci_choose_state(dev, state));
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return 0;
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@ -1705,21 +1723,12 @@ static int pciserial_resume_one(struct pci_dev *dev)
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pci_restore_state(dev);
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if (priv) {
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int i;
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/*
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* The device may have been disabled. Re-enable it.
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*/
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pci_enable_device(dev);
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/*
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* Ensure that the board is correctly configured.
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*/
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if (priv->quirk->init)
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priv->quirk->init(dev);
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for (i = 0; i < priv->nr; i++)
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serial8250_resume_port(priv->line[i]);
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pciserial_resume_ports(priv);
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}
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return 0;
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}
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@ -1,2 +1,40 @@
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/*
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* Definitions for PCI support.
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*/
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#define FL_BASE_MASK 0x0007
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#define FL_BASE0 0x0000
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#define FL_BASE1 0x0001
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#define FL_BASE2 0x0002
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#define FL_BASE3 0x0003
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#define FL_BASE4 0x0004
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#define FL_GET_BASE(x) (x & FL_BASE_MASK)
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/* Use successive BARs (PCI base address registers),
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else use offset into some specified BAR */
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#define FL_BASE_BARS 0x0008
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/* do not assign an irq */
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#define FL_NOIRQ 0x0080
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/* Use the Base address register size to cap number of ports */
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#define FL_REGION_SZ_CAP 0x0100
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struct pciserial_board {
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unsigned int flags;
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unsigned int num_ports;
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unsigned int base_baud;
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unsigned int uart_offset;
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unsigned int reg_shift;
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unsigned int first_offset;
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};
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struct serial_private;
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struct serial_private *
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pciserial_init_ports(struct pci_dev *dev, struct pciserial_board *board);
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void pciserial_remove_ports(struct serial_private *priv);
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void pciserial_suspend_ports(struct serial_private *priv);
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void pciserial_resume_ports(struct serial_private *priv);
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int pci_siig10x_fn(struct pci_dev *dev, int enable);
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int pci_siig20x_fn(struct pci_dev *dev, int enable);
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