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[MIPS] JAZZ fixes
- restructured irq handling - switched vdma to use memory allocated via get_free_pages - setup platform devices for serial, jazz_esp and jazzsonic - fixed cmos rtc access Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Thomas Bogendoerfer
Ralf Baechle
parent
1f21d2bde0
commit
ea202c632a
@ -93,6 +93,7 @@ config MACH_JAZZ
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select ARC32
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select ARCH_MAY_HAVE_PC_FDC
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select GENERIC_ISA_DMA
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select IRQ_CPU
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select I8259
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select ISA
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select PCSPEAKER
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@ -2,6 +2,6 @@
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# Makefile for the Jazz family specific parts of the kernel
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#
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obj-y := irq.o jazzdma.o jazz-platform.o reset.o setup.o
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obj-y := irq.o jazzdma.o reset.o setup.o
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EXTRA_CFLAGS += -Werror
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@ -11,15 +11,17 @@
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <asm/irq_cpu.h>
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#include <asm/i8259.h>
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#include <asm/io.h>
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#include <asm/jazz.h>
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#include <asm/pgtable.h>
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static DEFINE_SPINLOCK(r4030_lock);
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static void enable_r4030_irq(unsigned int irq)
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{
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unsigned int mask = 1 << (irq - JAZZ_PARALLEL_IRQ);
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unsigned int mask = 1 << (irq - JAZZ_IRQ_START);
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unsigned long flags;
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spin_lock_irqsave(&r4030_lock, flags);
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@ -30,7 +32,7 @@ static void enable_r4030_irq(unsigned int irq)
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void disable_r4030_irq(unsigned int irq)
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{
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unsigned int mask = ~(1 << (irq - JAZZ_PARALLEL_IRQ));
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unsigned int mask = ~(1 << (irq - JAZZ_IRQ_START));
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unsigned long flags;
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spin_lock_irqsave(&r4030_lock, flags);
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@ -51,7 +53,7 @@ void __init init_r4030_ints(void)
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{
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int i;
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for (i = JAZZ_PARALLEL_IRQ; i <= JAZZ_TIMER_IRQ; i++)
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for (i = JAZZ_IRQ_START; i <= JAZZ_IRQ_END; i++)
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set_irq_chip_and_handler(i, &r4030_irq_type, handle_level_irq);
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r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, 0);
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@ -66,82 +68,40 @@ void __init init_r4030_ints(void)
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*/
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void __init arch_init_irq(void)
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{
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/*
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* this is a hack to get back the still needed wired mapping
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* killed by init_mm()
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*/
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/* Map 0xe0000000 -> 0x0:800005C0, 0xe0010000 -> 0x1:30000580 */
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add_wired_entry(0x02000017, 0x03c00017, 0xe0000000, PM_64K);
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/* Map 0xe2000000 -> 0x0:900005C0, 0xe3010000 -> 0x0:910005C0 */
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add_wired_entry(0x02400017, 0x02440017, 0xe2000000, PM_16M);
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/* Map 0xe4000000 -> 0x0:600005C0, 0xe4100000 -> 400005C0 */
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add_wired_entry(0x01800017, 0x01000017, 0xe4000000, PM_4M);
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init_i8259_irqs(); /* Integrated i8259 */
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mips_cpu_irq_init();
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init_r4030_ints();
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change_c0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1);
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}
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static void loc_call(unsigned int irq, unsigned int mask)
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{
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r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
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r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) & mask);
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do_IRQ(irq);
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r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
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r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) | mask);
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}
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static void ll_local_dev(void)
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{
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switch (r4030_read_reg32(JAZZ_IO_IRQ_SOURCE)) {
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case 0:
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panic("Unimplemented loc_no_irq handler");
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break;
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case 4:
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loc_call(JAZZ_PARALLEL_IRQ, JAZZ_IE_PARALLEL);
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break;
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case 8:
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loc_call(JAZZ_PARALLEL_IRQ, JAZZ_IE_FLOPPY);
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break;
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case 12:
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panic("Unimplemented loc_sound handler");
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break;
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case 16:
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panic("Unimplemented loc_video handler");
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break;
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case 20:
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loc_call(JAZZ_ETHERNET_IRQ, JAZZ_IE_ETHERNET);
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break;
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case 24:
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loc_call(JAZZ_SCSI_IRQ, JAZZ_IE_SCSI);
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break;
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case 28:
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loc_call(JAZZ_KEYBOARD_IRQ, JAZZ_IE_KEYBOARD);
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break;
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case 32:
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loc_call(JAZZ_MOUSE_IRQ, JAZZ_IE_MOUSE);
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break;
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case 36:
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loc_call(JAZZ_SERIAL1_IRQ, JAZZ_IE_SERIAL1);
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break;
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case 40:
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loc_call(JAZZ_SERIAL2_IRQ, JAZZ_IE_SERIAL2);
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break;
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}
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change_c0_status(ST0_IM, IE_IRQ2 | IE_IRQ1);
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}
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asmlinkage void plat_irq_dispatch(void)
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{
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unsigned int pending = read_c0_cause() & read_c0_status();
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unsigned int irq;
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if (pending & IE_IRQ5)
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write_c0_compare(0);
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else if (pending & IE_IRQ4) {
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if (pending & IE_IRQ4) {
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r4030_read_reg32(JAZZ_TIMER_REGISTER);
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do_IRQ(JAZZ_TIMER_IRQ);
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} else if (pending & IE_IRQ3)
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panic("Unimplemented ISA NMI handler");
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else if (pending & IE_IRQ2)
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} else if (pending & IE_IRQ2)
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do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK));
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else if (pending & IE_IRQ1) {
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ll_local_dev();
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} else if (unlikely(pending & IE_IRQ0))
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panic("Unimplemented local_dma handler");
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else if (pending & IE_SW1) {
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clear_c0_cause(IE_SW1);
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panic("Unimplemented sw1 handler");
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} else if (pending & IE_SW0) {
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clear_c0_cause(IE_SW0);
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panic("Unimplemented sw0 handler");
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irq = *(volatile u8 *)JAZZ_IO_IRQ_SOURCE >> 2;
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if (likely(irq > 0))
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do_IRQ(irq + JAZZ_IRQ_START - 1);
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else
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panic("Unimplemented loc_no_irq handler");
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}
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}
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@ -1,60 +0,0 @@
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org)
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/serial_8250.h>
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#include <asm/jazz.h>
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/*
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* Confusion ... It seems the original Microsoft Jazz machine used to have a
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* 4.096MHz clock for its UART while the MIPS Magnum and Millenium systems
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* had 8MHz. The Olivetti M700-10 and the Acer PICA have 1.8432MHz like PCs.
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*/
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#ifdef CONFIG_OLIVETTI_M700
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#define JAZZ_BASE_BAUD 1843200
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#else
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#define JAZZ_BASE_BAUD 8000000 /* 3072000 */
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#endif
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#define JAZZ_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
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#define JAZZ_PORT(base, int) \
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{ \
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.mapbase = base, \
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.irq = int, \
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.uartclk = JAZZ_BASE_BAUD, \
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.iotype = UPIO_MEM, \
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.flags = JAZZ_UART_FLAGS, \
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.regshift = 0, \
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}
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static struct plat_serial8250_port uart8250_data[] = {
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JAZZ_PORT(JAZZ_SERIAL1_BASE, JAZZ_SERIAL1_IRQ),
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JAZZ_PORT(JAZZ_SERIAL2_BASE, JAZZ_SERIAL2_IRQ),
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{ },
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};
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static struct platform_device uart8250_device = {
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.name = "serial8250",
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.id = PLAT8250_DEV_PLATFORM,
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.dev = {
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.platform_data = uart8250_data,
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},
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};
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static int __init uart8250_init(void)
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{
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return platform_device_register(&uart8250_device);
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}
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module_init(uart8250_init);
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MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("8250 UART probe driver for the Jazz family");
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@ -27,7 +27,7 @@
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*/
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#define CONF_DEBUG_VDMA 0
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static unsigned long vdma_pagetable_start;
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static VDMA_PGTBL_ENTRY *pgtbl;
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static DEFINE_SPINLOCK(vdma_lock);
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@ -46,7 +46,6 @@ static int debuglvl = 3;
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*/
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static inline void vdma_pgtbl_init(void)
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{
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VDMA_PGTBL_ENTRY *pgtbl = (VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
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unsigned long paddr = 0;
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int i;
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@ -60,31 +59,31 @@ static inline void vdma_pgtbl_init(void)
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/*
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* Initialize the Jazz R4030 dma controller
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*/
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void __init vdma_init(void)
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static int __init vdma_init(void)
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{
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/*
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* Allocate 32k of memory for DMA page tables. This needs to be page
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* aligned and should be uncached to avoid cache flushing after every
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* update.
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*/
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vdma_pagetable_start =
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(unsigned long) alloc_bootmem_low_pages(VDMA_PGTBL_SIZE);
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if (!vdma_pagetable_start)
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pgtbl = (VDMA_PGTBL_ENTRY *)__get_free_pages(GFP_KERNEL | GFP_DMA,
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get_order(VDMA_PGTBL_SIZE));
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if (!pgtbl)
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BUG();
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dma_cache_wback_inv(vdma_pagetable_start, VDMA_PGTBL_SIZE);
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vdma_pagetable_start = KSEG1ADDR(vdma_pagetable_start);
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dma_cache_wback_inv((unsigned long)pgtbl, VDMA_PGTBL_SIZE);
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pgtbl = (VDMA_PGTBL_ENTRY *)KSEG1ADDR(pgtbl);
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/*
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* Clear the R4030 translation table
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*/
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vdma_pgtbl_init();
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r4030_write_reg32(JAZZ_R4030_TRSTBL_BASE,
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CPHYSADDR(vdma_pagetable_start));
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r4030_write_reg32(JAZZ_R4030_TRSTBL_BASE, CPHYSADDR(pgtbl));
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r4030_write_reg32(JAZZ_R4030_TRSTBL_LIM, VDMA_PGTBL_SIZE);
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r4030_write_reg32(JAZZ_R4030_TRSTBL_INV, 0);
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printk("VDMA: R4030 DMA pagetables initialized.\n");
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printk(KERN_INFO "VDMA: R4030 DMA pagetables initialized.\n");
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return 0;
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}
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/*
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@ -92,7 +91,6 @@ void __init vdma_init(void)
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*/
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unsigned long vdma_alloc(unsigned long paddr, unsigned long size)
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{
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VDMA_PGTBL_ENTRY *entry = (VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
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int first, last, pages, frame, i;
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unsigned long laddr, flags;
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@ -114,10 +112,10 @@ unsigned long vdma_alloc(unsigned long paddr, unsigned long size)
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/*
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* Find free chunk
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*/
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pages = (size + 4095) >> 12; /* no. of pages to allocate */
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pages = VDMA_PAGE(paddr + size) - VDMA_PAGE(paddr) + 1;
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first = 0;
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while (1) {
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while (entry[first].owner != VDMA_PAGE_EMPTY &&
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while (pgtbl[first].owner != VDMA_PAGE_EMPTY &&
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first < VDMA_PGTBL_ENTRIES) first++;
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if (first + pages > VDMA_PGTBL_ENTRIES) { /* nothing free */
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spin_unlock_irqrestore(&vdma_lock, flags);
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@ -125,12 +123,13 @@ unsigned long vdma_alloc(unsigned long paddr, unsigned long size)
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}
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last = first + 1;
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while (entry[last].owner == VDMA_PAGE_EMPTY
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while (pgtbl[last].owner == VDMA_PAGE_EMPTY
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&& last - first < pages)
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last++;
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if (last - first == pages)
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break; /* found */
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first = last + 1;
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}
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/*
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@ -140,8 +139,8 @@ unsigned long vdma_alloc(unsigned long paddr, unsigned long size)
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frame = paddr & ~(VDMA_PAGESIZE - 1);
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for (i = first; i < last; i++) {
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entry[i].frame = frame;
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entry[i].owner = laddr;
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pgtbl[i].frame = frame;
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pgtbl[i].owner = laddr;
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frame += VDMA_PAGESIZE;
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}
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@ -160,10 +159,10 @@ unsigned long vdma_alloc(unsigned long paddr, unsigned long size)
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printk("%08x ", i << 12);
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printk("\nPADDR: ");
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for (i = first; i < last; i++)
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printk("%08x ", entry[i].frame);
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printk("%08x ", pgtbl[i].frame);
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printk("\nOWNER: ");
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for (i = first; i < last; i++)
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printk("%08x ", entry[i].owner);
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printk("%08x ", pgtbl[i].owner);
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printk("\n");
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}
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@ -181,7 +180,6 @@ EXPORT_SYMBOL(vdma_alloc);
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*/
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int vdma_free(unsigned long laddr)
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{
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VDMA_PGTBL_ENTRY *pgtbl = (VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
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int i;
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i = laddr >> 12;
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@ -213,8 +211,6 @@ EXPORT_SYMBOL(vdma_free);
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*/
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int vdma_remap(unsigned long laddr, unsigned long paddr, unsigned long size)
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{
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VDMA_PGTBL_ENTRY *pgtbl =
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(VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
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int first, pages, npages;
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if (laddr > 0xffffff) {
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@ -289,8 +285,6 @@ unsigned long vdma_phys2log(unsigned long paddr)
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{
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int i;
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int frame;
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VDMA_PGTBL_ENTRY *pgtbl =
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(VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
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frame = paddr & ~(VDMA_PAGESIZE - 1);
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@ -312,9 +306,6 @@ EXPORT_SYMBOL(vdma_phys2log);
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*/
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unsigned long vdma_log2phys(unsigned long laddr)
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{
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VDMA_PGTBL_ENTRY *pgtbl =
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(VDMA_PGTBL_ENTRY *) vdma_pagetable_start;
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return pgtbl[laddr >> 12].frame + (laddr & (VDMA_PAGESIZE - 1));
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}
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@ -564,3 +555,5 @@ int vdma_get_enable(int channel)
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return enable;
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}
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arch_initcall(vdma_init);
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@ -7,6 +7,7 @@
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*
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* Copyright (C) 1996, 1997, 1998, 2001 by Ralf Baechle
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* Copyright (C) 2001 MIPS Technologies, Inc.
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* Copyright (C) 2007 by Thomas Bogendoerfer
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*/
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#include <linux/eisa.h>
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#include <linux/hdreg.h>
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@ -20,6 +21,8 @@
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#include <linux/ide.h>
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#include <linux/pm.h>
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#include <linux/screen_info.h>
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#include <linux/platform_device.h>
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#include <linux/serial_8250.h>
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#include <asm/bootinfo.h>
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#include <asm/irq.h>
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@ -30,6 +33,7 @@
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#include <asm/pgtable.h>
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#include <asm/time.h>
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#include <asm/traps.h>
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#include <asm/mc146818-time.h>
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extern asmlinkage void jazz_handle_int(void);
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@ -72,10 +76,8 @@ void __init plat_mem_setup(void)
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/* Map 0xe0000000 -> 0x0:800005C0, 0xe0010000 -> 0x1:30000580 */
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add_wired_entry (0x02000017, 0x03c00017, 0xe0000000, PM_64K);
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/* Map 0xe2000000 -> 0x0:900005C0, 0xe3010000 -> 0x0:910005C0 */
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add_wired_entry (0x02400017, 0x02440017, 0xe2000000, PM_16M);
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/* Map 0xe4000000 -> 0x0:600005C0, 0xe4100000 -> 400005C0 */
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add_wired_entry (0x01800017, 0x01000017, 0xe4000000, PM_4M);
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@ -94,6 +96,7 @@ void __init plat_mem_setup(void)
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_machine_restart = jazz_machine_restart;
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#ifdef CONFIG_VT
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screen_info = (struct screen_info) {
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0, 0, /* orig-x, orig-y */
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0, /* unused */
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@ -105,6 +108,112 @@ void __init plat_mem_setup(void)
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0, /* orig_video_isVGA */
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16 /* orig_video_points */
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};
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#endif
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vdma_init();
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add_preferred_console("ttyS", 0, "9600");
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}
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|
||||
#ifdef CONFIG_OLIVETTI_M700
|
||||
#define UART_CLK 1843200
|
||||
#else
|
||||
/* Some Jazz machines seem to have an 8MHz crystal clock but I don't know
|
||||
exactly which ones ... XXX */
|
||||
#define UART_CLK (8000000 / 16) /* ( 3072000 / 16) */
|
||||
#endif
|
||||
|
||||
#define MEMPORT(_base, _irq) \
|
||||
{ \
|
||||
.mapbase = (_base), \
|
||||
.membase = (void *)(_base), \
|
||||
.irq = (_irq), \
|
||||
.uartclk = UART_CLK, \
|
||||
.iotype = UPIO_MEM, \
|
||||
.flags = UPF_BOOT_AUTOCONF, \
|
||||
}
|
||||
|
||||
static struct plat_serial8250_port jazz_serial_data[] = {
|
||||
MEMPORT(JAZZ_SERIAL1_BASE, JAZZ_SERIAL1_IRQ),
|
||||
MEMPORT(JAZZ_SERIAL2_BASE, JAZZ_SERIAL2_IRQ),
|
||||
{ },
|
||||
};
|
||||
|
||||
static struct platform_device jazz_serial8250_device = {
|
||||
.name = "serial8250",
|
||||
.id = PLAT8250_DEV_PLATFORM,
|
||||
.dev = {
|
||||
.platform_data = jazz_serial_data,
|
||||
},
|
||||
};
|
||||
|
||||
static struct resource jazz_esp_rsrc[] = {
|
||||
{
|
||||
.start = JAZZ_SCSI_BASE,
|
||||
.end = JAZZ_SCSI_BASE + 31,
|
||||
.flags = IORESOURCE_MEM
|
||||
},
|
||||
{
|
||||
.start = JAZZ_SCSI_DMA,
|
||||
.end = JAZZ_SCSI_DMA,
|
||||
.flags = IORESOURCE_MEM
|
||||
},
|
||||
{
|
||||
.start = JAZZ_SCSI_IRQ,
|
||||
.end = JAZZ_SCSI_IRQ,
|
||||
.flags = IORESOURCE_IRQ
|
||||
}
|
||||
};
|
||||
|
||||
static struct platform_device jazz_esp_pdev = {
|
||||
.name = "jazz_esp",
|
||||
.num_resources = ARRAY_SIZE(jazz_esp_rsrc),
|
||||
.resource = jazz_esp_rsrc
|
||||
};
|
||||
|
||||
static struct resource jazz_sonic_rsrc[] = {
|
||||
{
|
||||
.start = JAZZ_ETHERNET_BASE,
|
||||
.end = JAZZ_ETHERNET_BASE + 0xff,
|
||||
.flags = IORESOURCE_MEM
|
||||
},
|
||||
{
|
||||
.start = JAZZ_ETHERNET_IRQ,
|
||||
.end = JAZZ_ETHERNET_IRQ,
|
||||
.flags = IORESOURCE_IRQ
|
||||
}
|
||||
};
|
||||
|
||||
static struct platform_device jazz_sonic_pdev = {
|
||||
.name = "jazzsonic",
|
||||
.num_resources = ARRAY_SIZE(jazz_sonic_rsrc),
|
||||
.resource = jazz_sonic_rsrc
|
||||
};
|
||||
|
||||
static struct resource jazz_cmos_rsrc[] = {
|
||||
{
|
||||
.start = 0x70,
|
||||
.end = 0x71,
|
||||
.flags = IORESOURCE_IO
|
||||
},
|
||||
{
|
||||
.start = 8,
|
||||
.end = 8,
|
||||
.flags = IORESOURCE_IRQ
|
||||
}
|
||||
};
|
||||
|
||||
static struct platform_device jazz_cmos_pdev = {
|
||||
.name = "rtc_cmos",
|
||||
.num_resources = ARRAY_SIZE(jazz_cmos_rsrc),
|
||||
.resource = jazz_cmos_rsrc
|
||||
};
|
||||
|
||||
static int __init jazz_setup_devinit(void)
|
||||
{
|
||||
platform_device_register(&jazz_serial8250_device);
|
||||
platform_device_register(&jazz_esp_pdev);
|
||||
platform_device_register(&jazz_sonic_pdev);
|
||||
platform_device_register(&jazz_cmos_pdev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
device_initcall(jazz_setup_devinit);
|
||||
|
||||
@ -184,38 +184,26 @@ typedef struct {
|
||||
#define JAZZ_IO_IRQ_SOURCE 0xe0010000
|
||||
#define JAZZ_IO_IRQ_ENABLE 0xe0010002
|
||||
|
||||
/*
|
||||
* JAZZ interrupt enable bits
|
||||
*/
|
||||
#define JAZZ_IE_PARALLEL (1 << 0)
|
||||
#define JAZZ_IE_FLOPPY (1 << 1)
|
||||
#define JAZZ_IE_SOUND (1 << 2)
|
||||
#define JAZZ_IE_VIDEO (1 << 3)
|
||||
#define JAZZ_IE_ETHERNET (1 << 4)
|
||||
#define JAZZ_IE_SCSI (1 << 5)
|
||||
#define JAZZ_IE_KEYBOARD (1 << 6)
|
||||
#define JAZZ_IE_MOUSE (1 << 7)
|
||||
#define JAZZ_IE_SERIAL1 (1 << 8)
|
||||
#define JAZZ_IE_SERIAL2 (1 << 9)
|
||||
|
||||
/*
|
||||
* JAZZ Interrupt Level definitions
|
||||
*
|
||||
* This is somewhat broken. For reasons which nobody can remember anymore
|
||||
* we remap the Jazz interrupts to the usual ISA style interrupt numbers.
|
||||
*/
|
||||
#define JAZZ_PARALLEL_IRQ 16
|
||||
#define JAZZ_FLOPPY_IRQ 17
|
||||
#define JAZZ_SOUND_IRQ 18
|
||||
#define JAZZ_VIDEO_IRQ 19
|
||||
#define JAZZ_ETHERNET_IRQ 20
|
||||
#define JAZZ_SCSI_IRQ 21
|
||||
#define JAZZ_KEYBOARD_IRQ 22
|
||||
#define JAZZ_MOUSE_IRQ 23
|
||||
#define JAZZ_SERIAL1_IRQ 24
|
||||
#define JAZZ_SERIAL2_IRQ 25
|
||||
#define JAZZ_IRQ_START 24
|
||||
#define JAZZ_IRQ_END (24 + 9)
|
||||
#define JAZZ_PARALLEL_IRQ (JAZZ_IRQ_START + 0)
|
||||
#define JAZZ_FLOPPY_IRQ (JAZZ_IRQ_START + 1)
|
||||
#define JAZZ_SOUND_IRQ (JAZZ_IRQ_START + 2)
|
||||
#define JAZZ_VIDEO_IRQ (JAZZ_IRQ_START + 3)
|
||||
#define JAZZ_ETHERNET_IRQ (JAZZ_IRQ_START + 4)
|
||||
#define JAZZ_SCSI_IRQ (JAZZ_IRQ_START + 5)
|
||||
#define JAZZ_KEYBOARD_IRQ (JAZZ_IRQ_START + 6)
|
||||
#define JAZZ_MOUSE_IRQ (JAZZ_IRQ_START + 7)
|
||||
#define JAZZ_SERIAL1_IRQ (JAZZ_IRQ_START + 8)
|
||||
#define JAZZ_SERIAL2_IRQ (JAZZ_IRQ_START + 9)
|
||||
|
||||
#define JAZZ_TIMER_IRQ 31
|
||||
#define JAZZ_TIMER_IRQ (MIPS_CPU_IRQ_BASE+6)
|
||||
|
||||
|
||||
/*
|
||||
|
||||
@ -7,7 +7,6 @@
|
||||
/*
|
||||
* Prototypes and macros
|
||||
*/
|
||||
extern void vdma_init(void);
|
||||
extern unsigned long vdma_alloc(unsigned long paddr, unsigned long size);
|
||||
extern int vdma_free(unsigned long laddr);
|
||||
extern int vdma_remap(unsigned long laddr, unsigned long paddr,
|
||||
|
||||
@ -4,12 +4,15 @@
|
||||
* for more details.
|
||||
*
|
||||
* Copyright (C) 1998, 2001, 03 by Ralf Baechle
|
||||
* Copyright (C) 2007 Thomas Bogendoerfer
|
||||
*
|
||||
* RTC routines for Jazz style attached Dallas chip.
|
||||
*/
|
||||
#ifndef __ASM_MACH_JAZZ_MC146818RTC_H
|
||||
#define __ASM_MACH_JAZZ_MC146818RTC_H
|
||||
|
||||
#include <linux/delay.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/jazz.h>
|
||||
|
||||
@ -19,16 +22,17 @@
|
||||
static inline unsigned char CMOS_READ(unsigned long addr)
|
||||
{
|
||||
outb_p(addr, RTC_PORT(0));
|
||||
|
||||
return *(char *)JAZZ_RTC_BASE;
|
||||
return *(volatile char *)JAZZ_RTC_BASE;
|
||||
}
|
||||
|
||||
static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
|
||||
{
|
||||
outb_p(addr, RTC_PORT(0));
|
||||
*(char *)JAZZ_RTC_BASE = data;
|
||||
*(volatile char *)JAZZ_RTC_BASE = data;
|
||||
}
|
||||
|
||||
#define RTC_ALWAYS_BCD 0
|
||||
|
||||
#define mc146818_decode_year(year) ((year) + 1980)
|
||||
|
||||
#endif /* __ASM_MACH_JAZZ_MC146818RTC_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user