1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-omap1/io.c
5 * OMAP1 I/O mapping code
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/init.h>
12 #include <linux/omap-dma.h>
15 #include <asm/mach/map.h>
22 * The machine specific code may provide the extra mapping besides the
23 * default mapping provided here.
25 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
26 static struct map_desc omap7xx_io_desc[] __initdata = {
28 .virtual = OMAP1_IO_VIRT,
29 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
30 .length = OMAP1_IO_SIZE,
34 .virtual = OMAP7XX_DSP_BASE,
35 .pfn = __phys_to_pfn(OMAP7XX_DSP_START),
36 .length = OMAP7XX_DSP_SIZE,
39 .virtual = OMAP7XX_DSPREG_BASE,
40 .pfn = __phys_to_pfn(OMAP7XX_DSPREG_START),
41 .length = OMAP7XX_DSPREG_SIZE,
47 #ifdef CONFIG_ARCH_OMAP15XX
48 static struct map_desc omap1510_io_desc[] __initdata = {
50 .virtual = OMAP1_IO_VIRT,
51 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
52 .length = OMAP1_IO_SIZE,
56 .virtual = OMAP1510_DSP_BASE,
57 .pfn = __phys_to_pfn(OMAP1510_DSP_START),
58 .length = OMAP1510_DSP_SIZE,
61 .virtual = OMAP1510_DSPREG_BASE,
62 .pfn = __phys_to_pfn(OMAP1510_DSPREG_START),
63 .length = OMAP1510_DSPREG_SIZE,
69 #if defined(CONFIG_ARCH_OMAP16XX)
70 static struct map_desc omap16xx_io_desc[] __initdata = {
72 .virtual = OMAP1_IO_VIRT,
73 .pfn = __phys_to_pfn(OMAP1_IO_PHYS),
74 .length = OMAP1_IO_SIZE,
78 .virtual = OMAP16XX_DSP_BASE,
79 .pfn = __phys_to_pfn(OMAP16XX_DSP_START),
80 .length = OMAP16XX_DSP_SIZE,
83 .virtual = OMAP16XX_DSPREG_BASE,
84 .pfn = __phys_to_pfn(OMAP16XX_DSPREG_START),
85 .length = OMAP16XX_DSPREG_SIZE,
91 #if defined (CONFIG_ARCH_OMAP730) || defined (CONFIG_ARCH_OMAP850)
92 void __init omap7xx_map_io(void)
94 iotable_init(omap7xx_io_desc, ARRAY_SIZE(omap7xx_io_desc));
98 #ifdef CONFIG_ARCH_OMAP15XX
99 void __init omap15xx_map_io(void)
101 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
105 #if defined(CONFIG_ARCH_OMAP16XX)
106 void __init omap16xx_map_io(void)
108 iotable_init(omap16xx_io_desc, ARRAY_SIZE(omap16xx_io_desc));
113 * Common low-level hardware init for omap1.
115 void __init omap1_init_early(void)
117 omap_check_revision();
119 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
120 * on a Posted Write in the TIPB Bridge".
122 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
123 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
126 void __init omap1_init_late(void)
128 omap_serial_wakeup_init();
132 * NOTE: Please use ioremap + __raw_read/write where possible instead of these
135 u8 omap_readb(u32 pa)
137 return __raw_readb(OMAP1_IO_ADDRESS(pa));
139 EXPORT_SYMBOL(omap_readb);
141 u16 omap_readw(u32 pa)
143 return __raw_readw(OMAP1_IO_ADDRESS(pa));
145 EXPORT_SYMBOL(omap_readw);
147 u32 omap_readl(u32 pa)
149 return __raw_readl(OMAP1_IO_ADDRESS(pa));
151 EXPORT_SYMBOL(omap_readl);
153 void omap_writeb(u8 v, u32 pa)
155 __raw_writeb(v, OMAP1_IO_ADDRESS(pa));
157 EXPORT_SYMBOL(omap_writeb);
159 void omap_writew(u16 v, u32 pa)
161 __raw_writew(v, OMAP1_IO_ADDRESS(pa));
163 EXPORT_SYMBOL(omap_writew);
165 void omap_writel(u32 v, u32 pa)
167 __raw_writel(v, OMAP1_IO_ADDRESS(pa));
169 EXPORT_SYMBOL(omap_writel);