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kernel add
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#include <linux/io.h>
#include <linux/module.h>
#include <linux/serial_8250.h>
#include <asm/bootinfo.h>
#include <loongson.h>
#include <machine.h>
#define PORT(int, clk) \
{ \
.irq = int, \
.uartclk = clk, \
.iotype = UPIO_PORT, \
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
.regshift = 0, \
}
#define PORT_M(int, clk) \
{ \
.irq = MIPS_CPU_IRQ_BASE + (int), \
.uartclk = clk, \
.iotype = UPIO_MEM, \
.membase = (void __iomem *)NULL, \
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
.regshift = 0, \
}
static struct plat_serial8250_port uart8250_data[][MAX_UARTS + 1] = {
[MACH_LOONGSON_UNKNOWN] = {},
[MACH_LEMOTE_FL2E] = {PORT(4, 1843200), {} },
[MACH_LEMOTE_FL2F] = {PORT(3, 1843200), {} },
[MACH_LEMOTE_ML2F7] = {PORT_M(3, 3686400), {} },
[MACH_LEMOTE_YL2F89] = {PORT_M(3, 3686400), {} },
[MACH_DEXXON_GDIUM2F10] = {PORT_M(3, 3686400), {} },
[MACH_LEMOTE_NAS] = {PORT_M(3, 3686400), {} },
[MACH_LEMOTE_LL2F] = {PORT(3, 1843200), {} },
[MACH_LOONGSON_GENERIC] = {PORT_M(2, 25000000), {} },
[MACH_LOONGSON_END] = {},
};
static struct platform_device uart8250_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
};
static int __init serial_init(void)
{
int i;
unsigned char iotype;
iotype = uart8250_data[mips_machtype][0].iotype;
if (UPIO_MEM == iotype) {
uart8250_data[mips_machtype][0].mapbase =
loongson_uart_base[0];
uart8250_data[mips_machtype][0].membase =
(void __iomem *)_loongson_uart_base[0];
}
else if (UPIO_PORT == iotype)
uart8250_data[mips_machtype][0].iobase =
loongson_uart_base[0] - LOONGSON_PCIIO_BASE;
if (loongson_sysconf.uarts[0].uartclk)
uart8250_data[mips_machtype][0].uartclk =
loongson_sysconf.uarts[0].uartclk;
for (i = 1; i < loongson_sysconf.nr_uarts; i++) {
iotype = loongson_sysconf.uarts[i].iotype;
uart8250_data[mips_machtype][i].iotype = iotype;
loongson_uart_base[i] = loongson_sysconf.uarts[i].uart_base;
if (UPIO_MEM == iotype) {
uart8250_data[mips_machtype][i].irq =
MIPS_CPU_IRQ_BASE + loongson_sysconf.uarts[i].int_offset;
uart8250_data[mips_machtype][i].mapbase =
loongson_uart_base[i];
uart8250_data[mips_machtype][i].membase =
ioremap_nocache(loongson_uart_base[i], 8);
} else if (UPIO_PORT == iotype) {
uart8250_data[mips_machtype][i].irq =
loongson_sysconf.uarts[i].int_offset;
uart8250_data[mips_machtype][i].iobase =
loongson_uart_base[i] - LOONGSON_PCIIO_BASE;
}
uart8250_data[mips_machtype][i].uartclk =
loongson_sysconf.uarts[i].uartclk;
uart8250_data[mips_machtype][i].flags =
UPF_BOOT_AUTOCONF | UPF_SKIP_TEST;
}
memset(&uart8250_data[mips_machtype][loongson_sysconf.nr_uarts],
0, sizeof(struct plat_serial8250_port));
uart8250_device.dev.platform_data = uart8250_data[mips_machtype];
return platform_device_register(&uart8250_device);
}
module_init(serial_init);
static void __init serial_exit(void)
{
platform_device_unregister(&uart8250_device);
}
module_exit(serial_exit);
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