2 * linux/arch/arm/mach-omap/common.c
4 * Code common to all OMAP machines.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #include <linux/config.h>
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/delay.h>
16 #include <linux/console.h>
18 #include <asm/hardware.h>
19 #include <asm/system.h>
20 #include <asm/pgtable.h>
21 #include <asm/mach/map.h>
22 #include <asm/arch/clocks.h>
23 #include <asm/arch/board.h>
27 * ----------------------------------------------------------------------------
30 * Since we use the cpu_is_omapnnnn() macros, there's a chance that a board
31 * switches to an updated core. We want to print out the OMAP revision early.
33 * We use the system_serial registers for the revision information so we
34 * can see it in /proc/cpuinfo.
36 * If the OMAP detection gets more complicated, we may want to expand this
37 * to store the OMAP version and replace the current cpu_is_omapnnnn() macros.
39 * ----------------------------------------------------------------------------
41 static void __init omap_check_revision(void)
43 system_serial_high = omap_readl(OMAP_ID_BASE);
44 system_serial_low = OMAP_ID_REG;
45 system_rev = (OMAP_ID_REG >> ID_SHIFT) & ID_MASK;
47 printk("OMAP revision: %d.%d (0x%08x) id: 0x%08x detected as OMAP-",
48 (system_serial_high >> 20) & 0xf,
49 (system_serial_high >> 16) & 0xf,
50 system_serial_high, system_serial_low);
70 printk("5912/1611B\n");
74 printk("unknown, please add support!\n");
79 * ----------------------------------------------------------------------------
82 * The machine specific code may provide the extra mapping besides the
83 * default mapping provided here.
84 * ----------------------------------------------------------------------------
87 static struct map_desc omap_io_desc[] __initdata = {
88 { IO_VIRT, IO_PHYS, IO_SIZE, MT_DEVICE },
91 #ifdef CONFIG_ARCH_OMAP730
92 static struct map_desc omap730_io_desc[] __initdata = {
93 { OMAP730_DSP_BASE, OMAP730_DSP_START, OMAP730_DSP_SIZE, MT_DEVICE },
94 { OMAP730_DSPREG_BASE, OMAP730_DSPREG_START, OMAP730_DSPREG_SIZE, MT_DEVICE },
95 { OMAP730_SRAM_BASE, OMAP730_SRAM_START, OMAP730_SRAM_SIZE, MT_DEVICE }
99 #ifdef CONFIG_ARCH_OMAP1510
100 static struct map_desc omap1510_io_desc[] __initdata = {
101 { OMAP1510_DSP_BASE, OMAP1510_DSP_START, OMAP1510_DSP_SIZE, MT_DEVICE },
102 { OMAP1510_DSPREG_BASE, OMAP1510_DSPREG_START, OMAP1510_DSPREG_SIZE, MT_DEVICE },
103 { OMAP1510_SRAM_BASE, OMAP1510_SRAM_START, OMAP1510_SRAM_SIZE, MT_DEVICE }
107 #ifdef CONFIG_ARCH_OMAP1610
108 static struct map_desc omap1610_io_desc[] __initdata = {
109 { OMAP1610_DSP_BASE, OMAP1610_DSP_START, OMAP1610_DSP_SIZE, MT_DEVICE },
110 { OMAP1610_DSPREG_BASE, OMAP1610_DSPREG_START, OMAP1610_DSPREG_SIZE, MT_DEVICE },
111 { OMAP1610_SRAM_BASE, OMAP1610_SRAM_START, OMAP1610_SRAM_SIZE, MT_DEVICE }
115 #ifdef CONFIG_ARCH_OMAP5912
116 static struct map_desc omap5912_io_desc[] __initdata = {
117 { OMAP5912_DSP_BASE, OMAP5912_DSP_START, OMAP5912_DSP_SIZE, MT_DEVICE },
118 { OMAP5912_DSPREG_BASE, OMAP5912_DSPREG_START, OMAP5912_DSPREG_SIZE, MT_DEVICE },
120 * The OMAP5912 has 250kByte internal SRAM. Because the mapping is baseed on page
121 * size (4kByte), it seems that the last 2kByte (=0x800) of the 250kByte are not mapped.
122 * Add additional 2kByte (0x800) so that the last page is mapped and the last 2kByte
125 { OMAP5912_SRAM_BASE, OMAP5912_SRAM_START, OMAP5912_SRAM_SIZE + 0x800, MT_DEVICE }
129 static int initialized = 0;
131 static void __init _omap_map_io(void)
135 /* We have to initialize the IO space mapping before we can run
136 * cpu_is_omapxxx() macros. */
137 iotable_init(omap_io_desc, ARRAY_SIZE(omap_io_desc));
138 omap_check_revision();
140 #ifdef CONFIG_ARCH_OMAP730
141 if (cpu_is_omap730()) {
142 iotable_init(omap730_io_desc, ARRAY_SIZE(omap730_io_desc));
145 #ifdef CONFIG_ARCH_OMAP1510
146 if (cpu_is_omap1510()) {
147 iotable_init(omap1510_io_desc, ARRAY_SIZE(omap1510_io_desc));
150 #ifdef CONFIG_ARCH_OMAP1610
151 if (cpu_is_omap1610()) {
152 iotable_init(omap1610_io_desc, ARRAY_SIZE(omap1610_io_desc));
155 #ifdef CONFIG_ARCH_OMAP5912
156 if (cpu_is_omap5912()) {
157 iotable_init(omap5912_io_desc, ARRAY_SIZE(omap5912_io_desc));
161 /* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
162 * on a Posted Write in the TIPB Bridge".
164 omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
165 omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
167 /* Must init clocks early to assure that timer interrupt works
173 * This should only get called from board specific init
175 void omap_map_io(void)
181 extern int omap_bootloader_tag_len;
182 extern u8 omap_bootloader_tag[];
184 const void *__omap_get_per_info(u16 tag, size_t len)
186 struct omap_board_info_entry *info = NULL;
188 #ifdef CONFIG_OMAP_BOOT_TAG
189 if (omap_bootloader_tag_len > 4)
190 info = (struct omap_board_info_entry *) omap_bootloader_tag;
191 while (info != NULL) {
194 if (info->tag == tag)
197 next = (u8 *) info + sizeof(*info) + info->len;
198 if (next >= omap_bootloader_tag + omap_bootloader_tag_len)
201 info = (struct omap_board_info_entry *) next;
206 if (info->len != len) {
207 printk(KERN_ERR "OMAP per_info: Length mismatch with tag %x (want %d, got %d)\n",
208 tag, len, info->len);
214 EXPORT_SYMBOL(__omap_get_per_info);
216 static int __init omap_add_serial_console(void)
218 const struct omap_uart_info *info;
220 info = omap_get_per_info(OMAP_TAG_UART, struct omap_uart_info);
221 if (info != NULL && info->console_uart) {
222 static char speed[11], *opt = NULL;
224 if (info->console_speed) {
225 snprintf(speed, sizeof(speed), "%u", info->console_speed);
228 return add_preferred_console("ttyS", info->console_uart - 1, opt);
232 console_initcall(omap_add_serial_console);