116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/*
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* linux/arch/arm/mach-omap1/io.c
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*
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* OMAP1 I/O mapping code
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <asm/mach/map.h>
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#include <asm/io.h>
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#include <asm/arch/tc.h>
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extern int clk_init(void);
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extern void omap_check_revision(void);
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/*
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* The machine specific code may provide the extra mapping besides the
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* default mapping provided here.
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*/
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static struct map_desc omap_io_desc[] __initdata = {
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{ IO_VIRT, IO_PHYS, IO_SIZE, MT_DEVICE },
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};
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#ifdef CONFIG_ARCH_OMAP730
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static struct map_desc omap730_io_desc[] __initdata = {
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{ OMAP730_DSP_BASE, OMAP730_DSP_START, OMAP730_DSP_SIZE, MT_DEVICE },
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{ OMAP730_DSPREG_BASE, OMAP730_DSPREG_START, OMAP730_DSPREG_SIZE, MT_DEVICE },
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{ OMAP730_SRAM_BASE, OMAP730_SRAM_START, OMAP730_SRAM_SIZE, MT_DEVICE }
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};
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#endif
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#ifdef CONFIG_ARCH_OMAP1510
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static struct map_desc omap1510_io_desc[] __initdata = {
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{ OMAP1510_DSP_BASE, OMAP1510_DSP_START, OMAP1510_DSP_SIZE, MT_DEVICE },
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{ OMAP1510_DSPREG_BASE, OMAP1510_DSPREG_START, OMAP1510_DSPREG_SIZE, MT_DEVICE },
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{ OMAP1510_SRAM_BASE, OMAP1510_SRAM_START, OMAP1510_SRAM_SIZE, MT_DEVICE }
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};
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#endif
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#if defined(CONFIG_ARCH_OMAP16XX)
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static struct map_desc omap1610_io_desc[] __initdata = {
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{ OMAP16XX_DSP_BASE, OMAP16XX_DSP_START, OMAP16XX_DSP_SIZE, MT_DEVICE },
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{ OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_START, OMAP16XX_DSPREG_SIZE, MT_DEVICE },
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{ OMAP16XX_SRAM_BASE, OMAP16XX_SRAM_START, OMAP1610_SRAM_SIZE, MT_DEVICE }
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};
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static struct map_desc omap5912_io_desc[] __initdata = {
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{ OMAP16XX_DSP_BASE, OMAP16XX_DSP_START, OMAP16XX_DSP_SIZE, MT_DEVICE },
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{ OMAP16XX_DSPREG_BASE, OMAP16XX_DSPREG_START, OMAP16XX_DSPREG_SIZE, MT_DEVICE },
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/*
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* The OMAP5912 has 250kByte internal SRAM. Because the mapping is baseed on page
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* size (4kByte), it seems that the last 2kByte (=0x800) of the 250kByte are not mapped.
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* Add additional 2kByte (0x800) so that the last page is mapped and the last 2kByte
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* can be used.
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*/
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{ OMAP16XX_SRAM_BASE, OMAP16XX_SRAM_START, OMAP5912_SRAM_SIZE + 0x800, MT_DEVICE }
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};
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#endif
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static int initialized = 0;
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static void __init _omap_map_io(void)
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{
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initialized = 1;
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/* We have to initialize the IO space mapping before we can run
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* cpu_is_omapxxx() macros. */
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iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
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omap_check_revision();
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#ifdef CONFIG_ARCH_OMAP730
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if (cpu_is_omap730()) {
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iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc));
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}
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#endif
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#ifdef CONFIG_ARCH_OMAP1510
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if (cpu_is_omap1510()) {
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iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
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}
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#endif
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#if defined(CONFIG_ARCH_OMAP16XX)
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if (cpu_is_omap1610() || cpu_is_omap1710()) {
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iotable_init(omap1610_io_desc, ARRAY_SIZE(omap1610_io_desc));
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}
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if (cpu_is_omap5912()) {
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iotable_init(omap5912_io_desc, ARRAY_SIZE(omap5912_io_desc));
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}
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#endif
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/* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
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* on a Posted Write in the TIPB Bridge".
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*/
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omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
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omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
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/* Must init clocks early to assure that timer interrupt works
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*/
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clk_init();
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}
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/*
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* This should only get called from board specific init
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*/
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void omap_map_common_io(void)
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{
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if (!initialized)
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_omap_map_io();
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}
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