Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
Ralf Baechle | 566a3b9 | 2008-12-01 08:16:08 +0000 | [diff] [blame] | 6 | * Copyright (C) 2006, 07 MIPS Technologies, Inc. |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 7 | * written by Ralf Baechle (ralf@linux-mips.org) |
Ralf Baechle | 566a3b9 | 2008-12-01 08:16:08 +0000 | [diff] [blame] | 8 | * written by Ralf Baechle <ralf@linux-mips.org> |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 9 | * |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame] | 10 | * Copyright (C) 2008 Wind River Systems, Inc. |
| 11 | * updated by Tiejun Chen <tiejun.chen@windriver.com> |
| 12 | * |
| 13 | * 1. Probe driver for the Malta's UART ports: |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 14 | * |
| 15 | * o 2 ports in the SMC SuperIO |
| 16 | * o 1 port in the CBUS UART, a discrete 16550 which normally is only used |
| 17 | * for bringups. |
| 18 | * |
| 19 | * We don't use 8250_platform.c on Malta as it would result in the CBUS |
| 20 | * UART becoming ttyS0. |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame] | 21 | * |
| 22 | * 2. Register RTC-CMOS platform device on Malta. |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 23 | */ |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 24 | #include <linux/init.h> |
| 25 | #include <linux/serial_8250.h> |
David Howells | ca4d3e67 | 2010-10-07 14:08:54 +0100 | [diff] [blame] | 26 | #include <linux/irq.h> |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame] | 27 | #include <linux/platform_device.h> |
Ralf Baechle | 225ae5f | 2012-11-13 10:41:50 +0100 | [diff] [blame] | 28 | #include <asm/mips-boards/maltaint.h> |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 29 | |
| 30 | #define SMC_PORT(base, int) \ |
| 31 | { \ |
| 32 | .iobase = base, \ |
| 33 | .irq = int, \ |
| 34 | .uartclk = 1843200, \ |
| 35 | .iotype = UPIO_PORT, \ |
Maciej W. Rozycki | 7888478 | 2021-06-10 20:38:48 +0200 | [diff] [blame] | 36 | .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | \ |
| 37 | UPF_MAGIC_MULTIPLIER, \ |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 38 | .regshift = 0, \ |
| 39 | } |
| 40 | |
| 41 | #define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP) |
| 42 | |
| 43 | static struct plat_serial8250_port uart8250_data[] = { |
| 44 | SMC_PORT(0x3F8, 4), |
| 45 | SMC_PORT(0x2F8, 3), |
Leonid Yegoshin | f6ba061 | 2013-10-14 09:49:25 +0100 | [diff] [blame] | 46 | #ifndef CONFIG_MIPS_CMP |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 47 | { |
| 48 | .mapbase = 0x1f000900, /* The CBUS UART */ |
Ralf Baechle | 225ae5f | 2012-11-13 10:41:50 +0100 | [diff] [blame] | 49 | .irq = MIPS_CPU_IRQ_BASE + MIPSCPU_INT_MB2, |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 50 | .uartclk = 3686400, /* Twice the usual clk! */ |
Maciej W. Rozycki | 9a936d6 | 2021-06-26 06:11:13 +0200 | [diff] [blame] | 51 | .iotype = IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) ? |
| 52 | UPIO_MEM32BE : UPIO_MEM32, |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 53 | .flags = CBUS_UART_FLAGS, |
| 54 | .regshift = 3, |
| 55 | }, |
Leonid Yegoshin | f6ba061 | 2013-10-14 09:49:25 +0100 | [diff] [blame] | 56 | #endif |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 57 | { }, |
| 58 | }; |
| 59 | |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame] | 60 | static struct platform_device malta_uart8250_device = { |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 61 | .name = "serial8250", |
Ralf Baechle | 566a3b9 | 2008-12-01 08:16:08 +0000 | [diff] [blame] | 62 | .id = PLAT8250_DEV_PLATFORM, |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 63 | .dev = { |
| 64 | .platform_data = uart8250_data, |
| 65 | }, |
| 66 | }; |
| 67 | |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame] | 68 | static struct platform_device *malta_devices[] __initdata = { |
| 69 | &malta_uart8250_device, |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame] | 70 | }; |
| 71 | |
| 72 | static int __init malta_add_devices(void) |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 73 | { |
Masahiro Yamada | db19462 | 2016-09-15 00:31:01 +0900 | [diff] [blame] | 74 | return platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices)); |
Ralf Baechle | e7c4782 | 2007-07-10 17:33:01 +0100 | [diff] [blame] | 75 | } |
| 76 | |
Tiejun Chen | 192cc7f | 2008-11-25 16:33:20 +0800 | [diff] [blame] | 77 | device_initcall(malta_add_devices); |