2 * linux/arch/arm/plat-omap/common.c
4 * Code common to all OMAP machines.
5 * The file is created by Tony Lindgren <tony@atomide.com>
7 * Copyright (C) 2009 Texas Instruments
8 * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/delay.h>
18 #include <linux/console.h>
19 #include <linux/serial.h>
20 #include <linux/tty.h>
21 #include <linux/serial_8250.h>
22 #include <linux/serial_reg.h>
23 #include <linux/clk.h>
26 #include <mach/hardware.h>
27 #include <asm/system.h>
28 #include <asm/pgtable.h>
29 #include <asm/mach/map.h>
30 #include <asm/setup.h>
32 #include <mach/common.h>
33 #include <mach/board.h>
34 #include <mach/control.h>
36 #include <mach/fpga.h>
38 #include <mach/clock.h>
40 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
41 # include "../mach-omap2/sdrc.h"
44 #define NO_LENGTH_CHECK 0xffffffff
46 unsigned char omap_bootloader_tag[512];
47 int omap_bootloader_tag_len;
49 struct omap_board_config_kernel *omap_board_config;
50 int omap_board_config_size;
52 static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out)
54 struct omap_board_config_kernel *kinfo = NULL;
57 #ifdef CONFIG_OMAP_BOOT_TAG
58 struct omap_board_config_entry *info = NULL;
60 if (omap_bootloader_tag_len > 4)
61 info = (struct omap_board_config_entry *) omap_bootloader_tag;
62 while (info != NULL) {
65 if (info->tag == tag) {
71 if ((info->len & 0x03) != 0) {
72 /* We bail out to avoid an alignment fault */
73 printk(KERN_ERR "OMAP peripheral config: Length (%d) not word-aligned (tag %04x)\n",
74 info->len, info->tag);
77 next = (u8 *) info + sizeof(*info) + info->len;
78 if (next >= omap_bootloader_tag + omap_bootloader_tag_len)
81 info = (struct omap_board_config_entry *) next;
84 /* Check the length as a lame attempt to check for
85 * binary inconsistency. */
86 if (len != NO_LENGTH_CHECK) {
89 len = (len + 3) & ~0x03;
90 if (info->len != len) {
91 printk(KERN_ERR "OMAP peripheral config: Length mismatch with tag %x (want %d, got %d)\n",
101 /* Try to find the config from the board-specific structures
103 for (i = 0; i < omap_board_config_size; i++) {
104 if (omap_board_config[i].tag == tag) {
106 kinfo = &omap_board_config[i];
118 const void *__omap_get_config(u16 tag, size_t len, int nr)
120 return get_config(tag, len, nr, NULL);
122 EXPORT_SYMBOL(__omap_get_config);
124 const void *omap_get_var_config(u16 tag, size_t *len)
126 return get_config(tag, NO_LENGTH_CHECK, 0, len);
128 EXPORT_SYMBOL(omap_get_var_config);
130 static int __init omap_add_serial_console(void)
132 const struct omap_serial_console_config *con_info;
133 const struct omap_uart_config *uart_info;
134 static char speed[11], *opt = NULL;
135 int line, i, uart_idx;
137 uart_info = omap_get_config(OMAP_TAG_UART, struct omap_uart_config);
138 con_info = omap_get_config(OMAP_TAG_SERIAL_CONSOLE,
139 struct omap_serial_console_config);
140 if (uart_info == NULL || con_info == NULL)
143 if (con_info->console_uart == 0)
146 if (con_info->console_speed) {
147 snprintf(speed, sizeof(speed), "%u", con_info->console_speed);
151 uart_idx = con_info->console_uart - 1;
152 if (uart_idx >= OMAP_MAX_NR_PORTS) {
153 printk(KERN_INFO "Console: external UART#%d. "
154 "Not adding it as console this time.\n",
158 if (!(uart_info->enabled_uarts & (1 << uart_idx))) {
159 printk(KERN_ERR "Console: Selected UART#%d is "
160 "not enabled for this platform\n",
165 for (i = 0; i < uart_idx; i++) {
166 if (uart_info->enabled_uarts & (1 << i))
169 return add_preferred_console("ttyS", line, opt);
171 console_initcall(omap_add_serial_console);
175 * 32KHz clocksource ... always available, on pretty most chips except
176 * OMAP 730 and 1510. Other timers could be used as clocksources, with
177 * higher resolution in free-running counter modes (e.g. 12 MHz xtal),
178 * but systems won't necessarily want to spend resources that way.
181 #define OMAP16XX_TIMER_32K_SYNCHRONIZED 0xfffbc410
183 #if !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX))
185 #include <linux/clocksource.h>
187 #ifdef CONFIG_ARCH_OMAP16XX
188 static cycle_t omap16xx_32k_read(struct clocksource *cs)
190 return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED);
193 #define omap16xx_32k_read NULL
196 #ifdef CONFIG_ARCH_OMAP2420
197 static cycle_t omap2420_32k_read(struct clocksource *cs)
199 return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10);
202 #define omap2420_32k_read NULL
205 #ifdef CONFIG_ARCH_OMAP2430
206 static cycle_t omap2430_32k_read(struct clocksource *cs)
208 return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10);
211 #define omap2430_32k_read NULL
214 #ifdef CONFIG_ARCH_OMAP34XX
215 static cycle_t omap34xx_32k_read(struct clocksource *cs)
217 return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10);
220 #define omap34xx_32k_read NULL
223 #ifdef CONFIG_ARCH_OMAP4
224 static cycle_t omap44xx_32k_read(struct clocksource *cs)
226 return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10);
229 #define omap44xx_32k_read NULL
233 * Kernel assumes that sched_clock can be called early but may not have
236 static cycle_t omap_32k_read_dummy(struct clocksource *cs)
241 static struct clocksource clocksource_32k = {
242 .name = "32k_counter",
244 .read = omap_32k_read_dummy,
245 .mask = CLOCKSOURCE_MASK(32),
247 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
251 * Returns current time from boot in nsecs. It's OK for this to wrap
252 * around for now, as it's just a relative time stamp.
254 unsigned long long sched_clock(void)
256 unsigned long long ret;
258 ret = (unsigned long long)clocksource_32k.read(&clocksource_32k);
259 ret = (ret * clocksource_32k.mult_orig) >> clocksource_32k.shift;
263 static int __init omap_init_clocksource_32k(void)
265 static char err[] __initdata = KERN_ERR
266 "%s: can't register clocksource!\n";
268 if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
269 struct clk *sync_32k_ick;
271 if (cpu_is_omap16xx())
272 clocksource_32k.read = omap16xx_32k_read;
273 else if (cpu_is_omap2420())
274 clocksource_32k.read = omap2420_32k_read;
275 else if (cpu_is_omap2430())
276 clocksource_32k.read = omap2430_32k_read;
277 else if (cpu_is_omap34xx())
278 clocksource_32k.read = omap34xx_32k_read;
279 else if (cpu_is_omap44xx())
280 clocksource_32k.read = omap44xx_32k_read;
284 sync_32k_ick = clk_get(NULL, "omap_32ksync_ick");
286 clk_enable(sync_32k_ick);
288 clocksource_32k.mult = clocksource_hz2mult(32768,
289 clocksource_32k.shift);
291 if (clocksource_register(&clocksource_32k))
292 printk(err, clocksource_32k.name);
296 arch_initcall(omap_init_clocksource_32k);
298 #endif /* !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) */
300 /* Global address base setup code */
302 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
304 static void __init __omap2_set_globals(struct omap_globals *omap2_globals)
306 omap2_set_globals_tap(omap2_globals);
307 omap2_set_globals_sdrc(omap2_globals);
308 omap2_set_globals_control(omap2_globals);
309 omap2_set_globals_prcm(omap2_globals);
314 #if defined(CONFIG_ARCH_OMAP2420)
316 static struct omap_globals omap242x_globals = {
317 .class = OMAP242X_CLASS,
318 .tap = OMAP2_IO_ADDRESS(0x48014000),
319 .sdrc = OMAP2_IO_ADDRESS(OMAP2420_SDRC_BASE),
320 .sms = OMAP2_IO_ADDRESS(OMAP2420_SMS_BASE),
321 .ctrl = OMAP2_IO_ADDRESS(OMAP2420_CTRL_BASE),
322 .prm = OMAP2_IO_ADDRESS(OMAP2420_PRM_BASE),
323 .cm = OMAP2_IO_ADDRESS(OMAP2420_CM_BASE),
326 void __init omap2_set_globals_242x(void)
328 __omap2_set_globals(&omap242x_globals);
332 #if defined(CONFIG_ARCH_OMAP2430)
334 static struct omap_globals omap243x_globals = {
335 .class = OMAP243X_CLASS,
336 .tap = OMAP2_IO_ADDRESS(0x4900a000),
337 .sdrc = OMAP2_IO_ADDRESS(OMAP243X_SDRC_BASE),
338 .sms = OMAP2_IO_ADDRESS(OMAP243X_SMS_BASE),
339 .ctrl = OMAP2_IO_ADDRESS(OMAP243X_CTRL_BASE),
340 .prm = OMAP2_IO_ADDRESS(OMAP2430_PRM_BASE),
341 .cm = OMAP2_IO_ADDRESS(OMAP2430_CM_BASE),
344 void __init omap2_set_globals_243x(void)
346 __omap2_set_globals(&omap243x_globals);
350 #if defined(CONFIG_ARCH_OMAP3430)
352 static struct omap_globals omap343x_globals = {
353 .class = OMAP343X_CLASS,
354 .tap = OMAP2_IO_ADDRESS(0x4830A000),
355 .sdrc = OMAP2_IO_ADDRESS(OMAP343X_SDRC_BASE),
356 .sms = OMAP2_IO_ADDRESS(OMAP343X_SMS_BASE),
357 .ctrl = OMAP2_IO_ADDRESS(OMAP343X_CTRL_BASE),
358 .prm = OMAP2_IO_ADDRESS(OMAP3430_PRM_BASE),
359 .cm = OMAP2_IO_ADDRESS(OMAP3430_CM_BASE),
362 void __init omap2_set_globals_343x(void)
364 __omap2_set_globals(&omap343x_globals);
368 #if defined(CONFIG_ARCH_OMAP4)
369 static struct omap_globals omap4_globals = {
370 .class = OMAP443X_CLASS,
371 .tap = OMAP2_IO_ADDRESS(0x4830a000),
372 .ctrl = OMAP2_IO_ADDRESS(OMAP443X_CTRL_BASE),
373 .prm = OMAP2_IO_ADDRESS(OMAP4430_PRM_BASE),
374 .cm = OMAP2_IO_ADDRESS(OMAP4430_CM_BASE),
377 void __init omap2_set_globals_443x(void)
379 omap2_set_globals_tap(&omap4_globals);
380 omap2_set_globals_control(&omap4_globals);