Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 171 insertions, 0 deletions

diff --git a/drivers/serial/8250_acpi.c b/drivers/serial/8250_acpi.c
new file mode 100644
index 00000000000..6b9ead28851
--- /dev/null
+++ b/drivers/serial/8250_acpi.c
@@ -0,0 +1,171 @@
+/*
+ * Copyright (c) 2002-2003 Matthew Wilcox for Hewlett-Packard
+ * Copyright (C) 2004 Hewlett-Packard Co
+ *      Bjorn Helgaas <bjorn.helgaas@hp.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.
+ */
+
+#include <linux/acpi.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/serial_core.h>
+
+#include <acpi/acpi_bus.h>
+
+#include <asm/io.h>
+
+#include "8250.h"
+
+struct serial_private {
+        int     line;
+};
+
+static acpi_status acpi_serial_mmio(struct uart_port *port,
+                                    struct acpi_resource_address64 *addr)
+{
+        port->mapbase = addr->min_address_range;
+        port->iotype = UPIO_MEM;
+        port->flags |= UPF_IOREMAP;
+        return AE_OK;
+}
+
+static acpi_status acpi_serial_port(struct uart_port *port,
+                                    struct acpi_resource_io *io)
+{
+        if (io->range_length) {
+                port->iobase = io->min_base_address;
+                port->iotype = UPIO_PORT;
+        } else
+                printk(KERN_ERR "%s: zero-length IO port range?\n", __FUNCTION__);
+        return AE_OK;
+}
+
+static acpi_status acpi_serial_ext_irq(struct uart_port *port,
+                                       struct acpi_resource_ext_irq *ext_irq)
+{
+        if (ext_irq->number_of_interrupts > 0)
+                port->irq = acpi_register_gsi(ext_irq->interrupts[0],
+                           ext_irq->edge_level, ext_irq->active_high_low);
+        return AE_OK;
+}
+
+static acpi_status acpi_serial_irq(struct uart_port *port,
+                                   struct acpi_resource_irq *irq)
+{
+        if (irq->number_of_interrupts > 0)
+                port->irq = acpi_register_gsi(irq->interrupts[0],
+                           irq->edge_level, irq->active_high_low);
+        return AE_OK;
+}
+
+static acpi_status acpi_serial_resource(struct acpi_resource *res, void *data)
+{
+        struct uart_port *port = (struct uart_port *) data;
+        struct acpi_resource_address64 addr;
+        acpi_status status;
+
+        status = acpi_resource_to_address64(res, &addr);
+        if (ACPI_SUCCESS(status))
+                return acpi_serial_mmio(port, &addr);
+        else if (res->id == ACPI_RSTYPE_IO)
+                return acpi_serial_port(port, &res->data.io);
+        else if (res->id == ACPI_RSTYPE_EXT_IRQ)
+                return acpi_serial_ext_irq(port, &res->data.extended_irq);
+        else if (res->id == ACPI_RSTYPE_IRQ)
+                return acpi_serial_irq(port, &res->data.irq);
+        return AE_OK;
+}
+
+static int acpi_serial_add(struct acpi_device *device)
+{
+        struct serial_private *priv;
+        acpi_status status;
+        struct uart_port port;
+        int result;
+
+        memset(&port, 0, sizeof(struct uart_port));
+
+        port.uartclk = 1843200;
+        port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF;
+
+        priv = kmalloc(sizeof(struct serial_private), GFP_KERNEL);
+        if (!priv) {
+                result = -ENOMEM;
+                goto fail;
+        }
+        memset(priv, 0, sizeof(*priv));
+
+        status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
+                                     acpi_serial_resource, &port);
+        if (ACPI_FAILURE(status)) {
+                result = -ENODEV;
+                goto fail;
+        }
+
+        if (!port.mapbase && !port.iobase) {
+                printk(KERN_ERR "%s: no iomem or port address in %s _CRS\n",
+                        __FUNCTION__, device->pnp.bus_id);
+                result = -ENODEV;
+                goto fail;
+        }
+
+        priv->line = serial8250_register_port(&port);
+        if (priv->line < 0) {
+                printk(KERN_WARNING "Couldn't register serial port %s: %d\n",
+                        device->pnp.bus_id, priv->line);
+                result = -ENODEV;
+                goto fail;
+        }
+
+        acpi_driver_data(device) = priv;
+        return 0;
+
+fail:
+        kfree(priv);
+
+        return result;
+}
+
+static int acpi_serial_remove(struct acpi_device *device, int type)
+{
+        struct serial_private *priv;
+
+        if (!device || !acpi_driver_data(device))
+                return -EINVAL;
+
+        priv = acpi_driver_data(device);
+        serial8250_unregister_port(priv->line);
+        kfree(priv);
+
+        return 0;
+}
+
+static struct acpi_driver acpi_serial_driver = {
+        .name =         "serial",
+        .class =        "",
+        .ids =          "PNP0501",
+        .ops =  {
+                .add =          acpi_serial_add,
+                .remove =       acpi_serial_remove,
+        },
+};
+
+static int __init acpi_serial_init(void)
+{
+        return acpi_bus_register_driver(&acpi_serial_driver);
+}
+
+static void __exit acpi_serial_exit(void)
+{
+        acpi_bus_unregister_driver(&acpi_serial_driver);
+}
+
+module_init(acpi_serial_init);
+module_exit(acpi_serial_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Generic 8250/16x50 ACPI serial driver");