Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / tty / serial / 8250 / 8250_acorn.c

diff --git a/kernel/drivers/tty/serial/8250/8250_acorn.c b/kernel/drivers/tty/serial/8250/8250_acorn.c
new file mode 100644 (file)
index 0000000..549aa07
--- /dev/null
+++ b/kernel/drivers/tty/serial/8250/8250_acorn.c
@@ -0,0 +1,141 @@
+/*
+ *  linux/drivers/serial/acorn.c
+ *
+ *  Copyright (C) 1996-2003 Russell King.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/tty.h>
+#include <linux/serial_core.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/device.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/ecard.h>
+#include <asm/string.h>
+
+#include "8250.h"
+
+#define MAX_PORTS      3
+
+struct serial_card_type {
+       unsigned int    num_ports;
+       unsigned int    uartclk;
+       unsigned int    type;
+       unsigned int    offset[MAX_PORTS];
+};
+
+struct serial_card_info {
+       unsigned int    num_ports;
+       int             ports[MAX_PORTS];
+       void __iomem *vaddr;
+};
+
+static int
+serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+       struct serial_card_info *info;
+       struct serial_card_type *type = id->data;
+       struct uart_8250_port uart;
+       unsigned long bus_addr;
+       unsigned int i;
+
+       info = kzalloc(sizeof(struct serial_card_info), GFP_KERNEL);
+       if (!info)
+               return -ENOMEM;
+
+       info->num_ports = type->num_ports;
+
+       bus_addr = ecard_resource_start(ec, type->type);
+       info->vaddr = ecardm_iomap(ec, type->type, 0, 0);
+       if (!info->vaddr) {
+               kfree(info);
+               return -ENOMEM;
+       }
+
+       ecard_set_drvdata(ec, info);
+
+       memset(&uart, 0, sizeof(struct uart_8250_port));
+       uart.port.irq   = ec->irq;
+       uart.port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
+       uart.port.uartclk       = type->uartclk;
+       uart.port.iotype        = UPIO_MEM;
+       uart.port.regshift      = 2;
+       uart.port.dev   = &ec->dev;
+
+       for (i = 0; i < info->num_ports; i ++) {
+               uart.port.membase = info->vaddr + type->offset[i];
+               uart.port.mapbase = bus_addr + type->offset[i];
+
+               info->ports[i] = serial8250_register_8250_port(&uart);
+       }
+
+       return 0;
+}
+
+static void serial_card_remove(struct expansion_card *ec)
+{
+       struct serial_card_info *info = ecard_get_drvdata(ec);
+       int i;
+
+       ecard_set_drvdata(ec, NULL);
+
+       for (i = 0; i < info->num_ports; i++)
+               if (info->ports[i] > 0)
+                       serial8250_unregister_port(info->ports[i]);
+
+       kfree(info);
+}
+
+static struct serial_card_type atomwide_type = {
+       .num_ports      = 3,
+       .uartclk        = 7372800,
+       .type           = ECARD_RES_IOCSLOW,
+       .offset         = { 0x2800, 0x2400, 0x2000 },
+};
+
+static struct serial_card_type serport_type = {
+       .num_ports      = 2,
+       .uartclk        = 3686400,
+       .type           = ECARD_RES_IOCSLOW,
+       .offset         = { 0x2000, 0x2020 },
+};
+
+static const struct ecard_id serial_cids[] = {
+       { MANU_ATOMWIDE,        PROD_ATOMWIDE_3PSERIAL, &atomwide_type  },
+       { MANU_SERPORT,         PROD_SERPORT_DSPORT,    &serport_type   },
+       { 0xffff, 0xffff }
+};
+
+static struct ecard_driver serial_card_driver = {
+       .probe          = serial_card_probe,
+       .remove         = serial_card_remove,
+       .id_table       = serial_cids,
+       .drv = {
+               .name   = "8250_acorn",
+       },
+};
+
+static int __init serial_card_init(void)
+{
+       return ecard_register_driver(&serial_card_driver);
+}
+
+static void __exit serial_card_exit(void)
+{
+       ecard_remove_driver(&serial_card_driver);
+}
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver");
+MODULE_LICENSE("GPL");
+
+module_init(serial_card_init);
+module_exit(serial_card_exit);