LXR linux/arch/mips/loongson2ef/common/serial.c

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 *
   6 * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
   7 *
   8 * Copyright (C) 2009 Lemote, Inc.
   9 * Author: Yan hua (yanhua@lemote.com)
  10 * Author: Wu Zhangjin (wuzhangjin@gmail.com)
  11 */
  12
  13#include <linux/io.h>
  14#include <linux/module.h>
  15#include <linux/serial_8250.h>
  16
  17#include <asm/bootinfo.h>
  18
  19#include <loongson.h>
  20#include <machine.h>
  21
  22#define PORT(int, clk)                  \
  23{                                                               \
  24        .irq            = int,                                  \
  25        .uartclk        = clk,                                  \
  26        .iotype         = UPIO_PORT,                            \
  27        .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,    \
  28        .regshift       = 0,                                    \
  29}
  30
  31#define PORT_M(int, clk)                                \
  32{                                                               \
  33        .irq            = MIPS_CPU_IRQ_BASE + (int),            \
  34        .uartclk        = clk,                                  \
  35        .iotype         = UPIO_MEM,                             \
  36        .membase        = (void __iomem *)NULL,                 \
  37        .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,    \
  38        .regshift       = 0,                                    \
  39}
  40
  41static struct plat_serial8250_port uart8250_data[MACH_LOONGSON_END + 1] = {
  42        [MACH_LOONGSON_UNKNOWN] = {},
  43        [MACH_LEMOTE_FL2E]      = PORT(4, 1843200),
  44        [MACH_LEMOTE_FL2F]      = PORT(3, 1843200),
  45        [MACH_LEMOTE_ML2F7]     = PORT_M(3, 3686400),
  46        [MACH_LEMOTE_YL2F89]    = PORT_M(3, 3686400),
  47        [MACH_DEXXON_GDIUM2F10] = PORT_M(3, 3686400),
  48        [MACH_LEMOTE_NAS]       = PORT_M(3, 3686400),
  49        [MACH_LEMOTE_LL2F]      = PORT(3, 1843200),
  50        [MACH_LOONGSON_END]     = {},
  51};
  52
  53static struct platform_device uart8250_device = {
  54        .name = "serial8250",
  55        .id = PLAT8250_DEV_PLATFORM,
  56};
  57
  58static int __init serial_init(void)
  59{
  60        unsigned char iotype;
  61
  62        iotype = uart8250_data[mips_machtype].iotype;
  63
  64        if (UPIO_MEM == iotype) {
  65                uart8250_data[mips_machtype].mapbase =
  66                        loongson_uart_base;
  67                uart8250_data[mips_machtype].membase =
  68                        (void __iomem *)_loongson_uart_base;
  69        }
  70        else if (UPIO_PORT == iotype)
  71                uart8250_data[mips_machtype].iobase =
  72                        loongson_uart_base - LOONGSON_PCIIO_BASE;
  73
  74        memset(&uart8250_data[mips_machtype + 1], 0,
  75                        sizeof(struct plat_serial8250_port));
  76        uart8250_device.dev.platform_data = &uart8250_data[mips_machtype];
  77
  78        return platform_device_register(&uart8250_device);
  79}
  80module_init(serial_init);
  81
  82static void __exit serial_exit(void)
  83{
  84        platform_device_unregister(&uart8250_device);
  85}
  86module_exit(serial_exit);
  87