2 * Copyright 2011, Netlogic Microsystems.
3 * Copyright 2004, Matt Porter <mporter@kernel.crashing.org>
5 * This file is licensed under the terms of the GNU General Public
6 * License version 2. This program is licensed "as is" without any
7 * warranty of any kind, whether express or implied.
10 #include <linux/device.h>
11 #include <linux/platform_device.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/resource.h>
15 #include <linux/serial_8250.h>
16 #include <linux/serial_reg.h>
18 #include <asm/netlogic/xlr/iomap.h>
19 #include <asm/netlogic/xlr/pic.h>
20 #include <asm/netlogic/xlr/xlr.h>
22 unsigned int nlm_xlr_uart_in(struct uart_port *p, int offset)
27 /* XLR uart does not need any mapping of regs */
28 mmio = (nlm_reg_t *)(p->membase + (offset << p->regshift));
29 value = netlogic_read_reg(mmio, 0);
31 /* See XLR/XLS errata */
32 if (offset == UART_MSR)
34 else if (offset == UART_MCR)
40 void nlm_xlr_uart_out(struct uart_port *p, int offset, int value)
44 /* XLR uart does not need any mapping of regs */
45 mmio = (nlm_reg_t *)(p->membase + (offset << p->regshift));
47 /* See XLR/XLS errata */
48 if (offset == UART_MSR)
50 else if (offset == UART_MCR)
53 netlogic_write_reg(mmio, 0, value);
60 .iotype = UPIO_MEM32, \
61 .flags = (UPF_SKIP_TEST | \
62 UPF_FIXED_TYPE | UPF_BOOT_AUTOCONF),\
63 .uartclk = PIC_CLKS_PER_SEC, \
64 .type = PORT_16550A, \
65 .serial_in = nlm_xlr_uart_in, \
66 .serial_out = nlm_xlr_uart_out, \
69 static struct plat_serial8250_port xlr_uart_data[] = {
75 static struct platform_device uart_device = {
77 .id = PLAT8250_DEV_PLATFORM,
79 .platform_data = xlr_uart_data,
83 static int __init nlm_uart_init(void)
87 mmio = netlogic_io_mmio(NETLOGIC_IO_UART_0_OFFSET);
88 xlr_uart_data[0].membase = (void __iomem *)mmio;
89 xlr_uart_data[0].mapbase = CPHYSADDR((unsigned long)mmio);
91 mmio = netlogic_io_mmio(NETLOGIC_IO_UART_1_OFFSET);
92 xlr_uart_data[1].membase = (void __iomem *)mmio;
93 xlr_uart_data[1].mapbase = CPHYSADDR((unsigned long)mmio);
95 return platform_device_register(&uart_device);
98 arch_initcall(nlm_uart_init);