These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / mips / loongson64 / common / serial.c

diff --git a/kernel/arch/mips/loongson64/common/serial.c b/kernel/arch/mips/loongson64/common/serial.c
new file mode 100644 (file)
index 0000000..ffefc1c
--- /dev/null
+++ b/kernel/arch/mips/loongson64/common/serial.c
@@ -0,0 +1,117 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
+ *
+ * Copyright (C) 2009 Lemote, Inc.
+ * Author: Yan hua (yanhua@lemote.com)
+ * Author: Wu Zhangjin (wuzhangjin@gmail.com)
+ */
+
+#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);