diff options
Diffstat (limited to 'arch/arm/mach-omap1/io.c')
| -rw-r--r-- | arch/arm/mach-omap1/io.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/arch/arm/mach-omap1/io.c b/arch/arm/mach-omap1/io.c new file mode 100644 index 000000000..5a173fc2a --- /dev/null +++ b/arch/arm/mach-omap1/io.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/arch/arm/mach-omap1/io.c + * + * OMAP1 I/O mapping code + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/io.h> + +#include <asm/tlb.h> +#include <asm/mach/map.h> + +#include <mach/mux.h> +#include <mach/tc.h> +#include <linux/omap-dma.h> + +#include "iomap.h" +#include "common.h" +#include "clock.h" + +/* + * The machine specific code may provide the extra mapping besides the + * default mapping provided here. + */ +static struct map_desc omap_io_desc[] __initdata = { + { + .virtual = OMAP1_IO_VIRT, + .pfn = __phys_to_pfn(OMAP1_IO_PHYS), + .length = OMAP1_IO_SIZE, + .type = MT_DEVICE + } +}; + +#if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) +static struct map_desc omap7xx_io_desc[] __initdata = { + { + .virtual = OMAP7XX_DSP_BASE, + .pfn = __phys_to_pfn(OMAP7XX_DSP_START), + .length = OMAP7XX_DSP_SIZE, + .type = MT_DEVICE + }, { + .virtual = OMAP7XX_DSPREG_BASE, + .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START), + .length = OMAP7XX_DSPREG_SIZE, + .type = MT_DEVICE + } +}; +#endif + +#ifdef CONFIG_ARCH_OMAP15XX +static struct map_desc omap1510_io_desc[] __initdata = { + { + .virtual = OMAP1510_DSP_BASE, + .pfn = __phys_to_pfn(OMAP1510_DSP_START), + .length = OMAP1510_DSP_SIZE, + .type = MT_DEVICE + }, { + .virtual = OMAP1510_DSPREG_BASE, + .pfn = __phys_to_pfn(OMAP1510_DSPREG_START), + .length = OMAP1510_DSPREG_SIZE, + .type = MT_DEVICE + } +}; +#endif + +#if defined(CONFIG_ARCH_OMAP16XX) +static struct map_desc omap16xx_io_desc[] __initdata = { + { + .virtual = OMAP16XX_DSP_BASE, + .pfn = __phys_to_pfn(OMAP16XX_DSP_START), + .length = OMAP16XX_DSP_SIZE, + .type = MT_DEVICE + }, { + .virtual = OMAP16XX_DSPREG_BASE, + .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START), + .length = OMAP16XX_DSPREG_SIZE, + .type = MT_DEVICE + } +}; +#endif + +/* + * Maps common IO regions for omap1 + */ +static void __init omap1_map_common_io(void) +{ + iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc)); +} + +#if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850) +void __init omap7xx_map_io(void) +{ + omap1_map_common_io(); + iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc)); +} +#endif + +#ifdef CONFIG_ARCH_OMAP15XX +void __init omap15xx_map_io(void) +{ + omap1_map_common_io(); + iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc)); +} +#endif + +#if defined(CONFIG_ARCH_OMAP16XX) +void __init omap16xx_map_io(void) +{ + omap1_map_common_io(); + iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc)); +} +#endif + +/* + * Common low-level hardware init for omap1. + */ +void __init omap1_init_early(void) +{ + omap_check_revision(); + + /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort + * on a Posted Write in the TIPB Bridge". + */ + omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL); + omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL); + + /* Must init clocks early to assure that timer interrupt works + */ + omap1_clk_init(); + omap1_mux_init(); +} + +void __init omap1_init_late(void) +{ + omap_serial_wakeup_init(); +} + +/* + * NOTE: Please use ioremap + __raw_read/write where possible instead of these + */ + +u8 omap_readb(u32 pa) +{ + return __raw_readb(OMAP1_IO_ADDRESS(pa)); +} +EXPORT_SYMBOL(omap_readb); + +u16 omap_readw(u32 pa) +{ + return __raw_readw(OMAP1_IO_ADDRESS(pa)); +} +EXPORT_SYMBOL(omap_readw); + +u32 omap_readl(u32 pa) +{ + return __raw_readl(OMAP1_IO_ADDRESS(pa)); +} +EXPORT_SYMBOL(omap_readl); + +void omap_writeb(u8 v, u32 pa) +{ + __raw_writeb(v, OMAP1_IO_ADDRESS(pa)); +} +EXPORT_SYMBOL(omap_writeb); + +void omap_writew(u16 v, u32 pa) +{ + __raw_writew(v, OMAP1_IO_ADDRESS(pa)); +} +EXPORT_SYMBOL(omap_writew); + +void omap_writel(u32 v, u32 pa) +{ + __raw_writel(v, OMAP1_IO_ADDRESS(pa)); +} +EXPORT_SYMBOL(omap_writel); |