arch/mips/netlogic/xlp/platform.c

   1 /*
   2  * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
   3  * reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the NetLogic
   9  * license below:
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  *
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in
  19  *    the documentation and/or other materials provided with the
  20  *    distribution.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  24  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  29  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  31  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  32  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33  */
  34
  35 #include <linux/dma-mapping.h>
  36 #include <linux/kernel.h>
  37 #include <linux/delay.h>
  38 #include <linux/init.h>
  39 #include <linux/platform_device.h>
  40 #include <linux/serial.h>
  41 #include <linux/serial_8250.h>
  42 #include <linux/pci.h>
  43 #include <linux/serial_reg.h>
  44 #include <linux/spinlock.h>
  45
  46 #include <asm/time.h>
  47 #include <asm/addrspace.h>
  48 #include <asm/netlogic/haldefs.h>
  49 #include <asm/netlogic/xlp-hal/iomap.h>
  50 #include <asm/netlogic/xlp-hal/xlp.h>
  51 #include <asm/netlogic/xlp-hal/pic.h>
  52 #include <asm/netlogic/xlp-hal/uart.h>
  53
  54 static unsigned int nlm_xlp_uart_in(struct uart_port *p, int offset)
  55 {
  56          return nlm_read_reg(p->iobase, offset);
  57 }
  58
  59 static void nlm_xlp_uart_out(struct uart_port *p, int offset, int value)
  60 {
  61         nlm_write_reg(p->iobase, offset, value);
  62 }
  63
  64 #define PORT(_irq)                                      \
  65         {                                               \
  66                 .irq            = _irq,                 \
  67                 .regshift       = 2,                    \
  68                 .iotype         = UPIO_MEM32,           \
  69                 .flags          = (UPF_SKIP_TEST|UPF_FIXED_TYPE|\
  70                                         UPF_BOOT_AUTOCONF),     \
  71                 .uartclk        = XLP_IO_CLK,           \
  72                 .type           = PORT_16550A,          \
  73                 .serial_in      = nlm_xlp_uart_in,      \
  74                 .serial_out     = nlm_xlp_uart_out,     \
  75         }
  76
  77 static struct plat_serial8250_port xlp_uart_data[] = {
  78         PORT(PIC_UART_0_IRQ),
  79         PORT(PIC_UART_1_IRQ),
  80         {},
  81 };
  82
  83 static struct platform_device uart_device = {
  84         .name           = "serial8250",
  85         .id             = PLAT8250_DEV_PLATFORM,
  86         .dev = {
  87                 .platform_data = xlp_uart_data,
  88         },
  89 };
  90
  91 static int __init nlm_platform_uart_init(void)
  92 {
  93         unsigned long mmio;
  94
  95         mmio = (unsigned long)nlm_get_uart_regbase(0, 0);
  96         xlp_uart_data[0].iobase = mmio;
  97         xlp_uart_data[0].membase = (void __iomem *)mmio;
  98         xlp_uart_data[0].mapbase = mmio;
  99
 100         mmio = (unsigned long)nlm_get_uart_regbase(0, 1);
 101         xlp_uart_data[1].iobase = mmio;
 102         xlp_uart_data[1].membase = (void __iomem *)mmio;
 103         xlp_uart_data[1].mapbase = mmio;
 104
 105         return platform_device_register(&uart_device);
 106 }
 107
 108 arch_initcall(nlm_platform_uart_init);