diff options
Diffstat (limited to 'arch/mips/sni/rm200.c')
| -rw-r--r-- | arch/mips/sni/rm200.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/arch/mips/sni/rm200.c b/arch/mips/sni/rm200.c new file mode 100644 index 000000000000..b82ff129f5ea --- /dev/null +++ b/arch/mips/sni/rm200.c @@ -0,0 +1,186 @@ +/* + * RM200 specific code + * + * 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) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de) + */ + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/serial_8250.h> + +#include <asm/sni.h> +#include <asm/time.h> +#include <asm/ds1216.h> +#include <asm/irq_cpu.h> + +#define PORT(_base,_irq) \ + { \ + .iobase = _base, \ + .irq = _irq, \ + .uartclk = 1843200, \ + .iotype = UPIO_PORT, \ + .flags = UPF_BOOT_AUTOCONF, \ + } + +static struct plat_serial8250_port rm200_data[] = { + PORT(0x3f8, 4), + PORT(0x2f8, 3), + { }, +}; + +static struct platform_device rm200_serial8250_device = { + .name = "serial8250", + .id = PLAT8250_DEV_PLATFORM, + .dev = { + .platform_data = rm200_data, + }, +}; + +static struct resource snirm_82596_rm200_rsrc[] = { + { + .start = 0xb8000000, + .end = 0xb80fffff, + .flags = IORESOURCE_MEM + }, + { + .start = 0xbb000000, + .end = 0xbb000004, + .flags = IORESOURCE_MEM + }, + { + .start = 0xbff00000, + .end = 0xbff00020, + .flags = IORESOURCE_MEM + }, + { + .start = 27, + .end = 27, + .flags = IORESOURCE_IRQ + }, + { + .flags = 0x00 + } +}; + +static struct platform_device snirm_82596_rm200_pdev = { + .name = "snirm_82596", + .num_resources = ARRAY_SIZE(snirm_82596_rm200_rsrc), + .resource = snirm_82596_rm200_rsrc +}; + +static struct resource snirm_53c710_rm200_rsrc[] = { + { + .start = 0xb9000000, + .end = 0xb90fffff, + .flags = IORESOURCE_MEM + }, + { + .start = 26, + .end = 26, + .flags = IORESOURCE_IRQ + } +}; + +static struct platform_device snirm_53c710_rm200_pdev = { + .name = "snirm_53c710", + .num_resources = ARRAY_SIZE(snirm_53c710_rm200_rsrc), + .resource = snirm_53c710_rm200_rsrc +}; + +static int __init snirm_setup_devinit(void) +{ + if (sni_brd_type == SNI_BRD_RM200) { + platform_device_register(&rm200_serial8250_device); + platform_device_register(&snirm_82596_rm200_pdev); + platform_device_register(&snirm_53c710_rm200_pdev); + } + return 0; +} + +device_initcall(snirm_setup_devinit); + + +#define SNI_RM200_INT_STAT_REG 0xbc000000 +#define SNI_RM200_INT_ENA_REG 0xbc080000 + +#define SNI_RM200_INT_START 24 +#define SNI_RM200_INT_END 28 + +static void enable_rm200_irq(unsigned int irq) +{ + unsigned int mask = 1 << (irq - SNI_RM200_INT_START); + + *(volatile u8 *)SNI_RM200_INT_ENA_REG &= ~mask; +} + +void disable_rm200_irq(unsigned int irq) +{ + unsigned int mask = 1 << (irq - SNI_RM200_INT_START); + + *(volatile u8 *)SNI_RM200_INT_ENA_REG |= mask; +} + +void end_rm200_irq(unsigned int irq) +{ + if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) + enable_rm200_irq(irq); +} + +static struct irq_chip rm200_irq_type = { + .typename = "RM200", + .ack = disable_rm200_irq, + .mask = disable_rm200_irq, + .mask_ack = disable_rm200_irq, + .unmask = enable_rm200_irq, + .end = end_rm200_irq, +}; + +static void sni_rm200_hwint(void) +{ + u32 pending = read_c0_cause() & read_c0_status(); + u8 mask; + u8 stat; + int irq; + + if (pending & C_IRQ5) + do_IRQ (MIPS_CPU_IRQ_BASE + 7); + else if (pending & C_IRQ0) { + clear_c0_status (IE_IRQ0); + mask = *(volatile u8 *)SNI_RM200_INT_ENA_REG ^ 0x1f; + stat = *(volatile u8 *)SNI_RM200_INT_STAT_REG ^ 0x14; + irq = ffs(stat & mask & 0x1f); + + if (likely(irq > 0)) + do_IRQ (irq + SNI_RM200_INT_START - 1); + set_c0_status (IE_IRQ0); + } +} + +void __init sni_rm200_irq_init(void) +{ + int i; + + * (volatile u8 *)SNI_RM200_INT_ENA_REG = 0x1f; + + mips_cpu_irq_init(); + /* Actually we've got more interrupts to handle ... */ + for (i = SNI_RM200_INT_START; i <= SNI_RM200_INT_END; i++) + set_irq_chip(i, &rm200_irq_type); + sni_hwint = sni_rm200_hwint; + change_c0_status(ST0_IM, IE_IRQ0); + setup_irq (SNI_RM200_INT_START + 0, &sni_isa_irq); +} + +void sni_rm200_init(void) +{ + set_io_port_base(SNI_PORT_BASE + 0x02000000); + ioport_resource.end += 0x02000000; + ds1216_base = (volatile unsigned char *) SNI_DS1216_RM200_BASE; + rtc_mips_get_time = ds1216_get_cmos_time; + board_time_init = sni_cpu_time_init; +} |