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
nlm_xlp_uart_in(struct uart_port * p,int offset)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
nlm_xlp_uart_out(struct uart_port * p,int offset,int value)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
nlm_platform_uart_init(void)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);
109