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>
25 #include <linux/omapfb.h>
27 #include <mach/hardware.h>
28 #include <asm/system.h>
29 #include <asm/pgtable.h>
30 #include <asm/mach/map.h>
31 #include <asm/setup.h>
33 #include <plat/common.h>
34 #include <plat/board.h>
35 #include <plat/control.h>
37 #include <plat/fpga.h>
38 #include <plat/serial.h>
39 #include <plat/vram.h>
42 #include <plat/clock.h>
44 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
45 # include "../mach-omap2/sdrc.h"
48 #define NO_LENGTH_CHECK 0xffffffff
50 struct omap_board_config_kernel *omap_board_config;
51 int omap_board_config_size;
53 static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out)
55 struct omap_board_config_kernel *kinfo = NULL;
58 /* Try to find the config from the board-specific structures
60 for (i = 0; i < omap_board_config_size; i++) {
61 if (omap_board_config[i].tag == tag) {
63 kinfo = &omap_board_config[i];
75 const void *__omap_get_config(u16 tag, size_t len, int nr)
77 return get_config(tag, len, nr, NULL);
79 EXPORT_SYMBOL(__omap_get_config);
81 const void *omap_get_var_config(u16 tag, size_t *len)
83 return get_config(tag, NO_LENGTH_CHECK, 0, len);
85 EXPORT_SYMBOL(omap_get_var_config);
87 void __init omap_reserve(void)
89 omapfb_reserve_sdram_memblock();
90 omap_vram_reserve_sdram_memblock();
91 omap_dsp_reserve_sdram_memblock();
95 * 32KHz clocksource ... always available, on pretty most chips except
96 * OMAP 730 and 1510. Other timers could be used as clocksources, with
97 * higher resolution in free-running counter modes (e.g. 12 MHz xtal),
98 * but systems won't necessarily want to spend resources that way.
101 #define OMAP16XX_TIMER_32K_SYNCHRONIZED 0xfffbc410
103 #if !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX))
105 #include <linux/clocksource.h>
108 * offset_32k holds the init time counter value. It is then subtracted
109 * from every counter read to achieve a counter that counts time from the
110 * kernel boot (needed for sched_clock()).
112 static u32 offset_32k __read_mostly;
114 #ifdef CONFIG_ARCH_OMAP16XX
115 static cycle_t omap16xx_32k_read(struct clocksource *cs)
117 return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED) - offset_32k;
120 #define omap16xx_32k_read NULL
123 #ifdef CONFIG_ARCH_OMAP2420
124 static cycle_t omap2420_32k_read(struct clocksource *cs)
126 return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10) - offset_32k;
129 #define omap2420_32k_read NULL
132 #ifdef CONFIG_ARCH_OMAP2430
133 static cycle_t omap2430_32k_read(struct clocksource *cs)
135 return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10) - offset_32k;
138 #define omap2430_32k_read NULL
141 #ifdef CONFIG_ARCH_OMAP3
142 static cycle_t omap34xx_32k_read(struct clocksource *cs)
144 return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10) - offset_32k;
147 #define omap34xx_32k_read NULL
150 #ifdef CONFIG_ARCH_OMAP4
151 static cycle_t omap44xx_32k_read(struct clocksource *cs)
153 return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10) - offset_32k;
156 #define omap44xx_32k_read NULL
160 * Kernel assumes that sched_clock can be called early but may not have
163 static cycle_t omap_32k_read_dummy(struct clocksource *cs)
168 static struct clocksource clocksource_32k = {
169 .name = "32k_counter",
171 .read = omap_32k_read_dummy,
172 .mask = CLOCKSOURCE_MASK(32),
174 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
178 * Returns current time from boot in nsecs. It's OK for this to wrap
179 * around for now, as it's just a relative time stamp.
181 unsigned long long sched_clock(void)
183 return clocksource_cyc2ns(clocksource_32k.read(&clocksource_32k),
184 clocksource_32k.mult, clocksource_32k.shift);
188 * read_persistent_clock - Return time from a persistent clock.
190 * Reads the time from a source which isn't disabled during PM, the
191 * 32k sync timer. Convert the cycles elapsed since last read into
192 * nsecs and adds to a monotonically increasing timespec.
194 static struct timespec persistent_ts;
195 static cycles_t cycles, last_cycles;
196 void read_persistent_clock(struct timespec *ts)
198 unsigned long long nsecs;
200 struct timespec *tsp = &persistent_ts;
202 last_cycles = cycles;
203 cycles = clocksource_32k.read(&clocksource_32k);
204 delta = cycles - last_cycles;
206 nsecs = clocksource_cyc2ns(delta,
207 clocksource_32k.mult, clocksource_32k.shift);
209 timespec_add_ns(tsp, nsecs);
213 static int __init omap_init_clocksource_32k(void)
215 static char err[] __initdata = KERN_ERR
216 "%s: can't register clocksource!\n";
218 if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
219 struct clk *sync_32k_ick;
221 if (cpu_is_omap16xx())
222 clocksource_32k.read = omap16xx_32k_read;
223 else if (cpu_is_omap2420())
224 clocksource_32k.read = omap2420_32k_read;
225 else if (cpu_is_omap2430())
226 clocksource_32k.read = omap2430_32k_read;
227 else if (cpu_is_omap34xx())
228 clocksource_32k.read = omap34xx_32k_read;
229 else if (cpu_is_omap44xx())
230 clocksource_32k.read = omap44xx_32k_read;
234 sync_32k_ick = clk_get(NULL, "omap_32ksync_ick");
236 clk_enable(sync_32k_ick);
238 clocksource_32k.mult = clocksource_hz2mult(32768,
239 clocksource_32k.shift);
241 offset_32k = clocksource_32k.read(&clocksource_32k);
243 if (clocksource_register(&clocksource_32k))
244 printk(err, clocksource_32k.name);
248 arch_initcall(omap_init_clocksource_32k);
250 #endif /* !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) */
252 /* Global address base setup code */
254 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
256 static void __init __omap2_set_globals(struct omap_globals *omap2_globals)
258 omap2_set_globals_tap(omap2_globals);
259 omap2_set_globals_sdrc(omap2_globals);
260 omap2_set_globals_control(omap2_globals);
261 omap2_set_globals_prcm(omap2_globals);
262 omap2_set_globals_uart(omap2_globals);
267 #if defined(CONFIG_ARCH_OMAP2420)
269 static struct omap_globals omap242x_globals = {
270 .class = OMAP242X_CLASS,
271 .tap = OMAP2_L4_IO_ADDRESS(0x48014000),
272 .sdrc = OMAP2420_SDRC_BASE,
273 .sms = OMAP2420_SMS_BASE,
274 .ctrl = OMAP2420_CTRL_BASE,
275 .prm = OMAP2420_PRM_BASE,
276 .cm = OMAP2420_CM_BASE,
277 .uart1_phys = OMAP2_UART1_BASE,
278 .uart2_phys = OMAP2_UART2_BASE,
279 .uart3_phys = OMAP2_UART3_BASE,
282 void __init omap2_set_globals_242x(void)
284 __omap2_set_globals(&omap242x_globals);
288 #if defined(CONFIG_ARCH_OMAP2430)
290 static struct omap_globals omap243x_globals = {
291 .class = OMAP243X_CLASS,
292 .tap = OMAP2_L4_IO_ADDRESS(0x4900a000),
293 .sdrc = OMAP243X_SDRC_BASE,
294 .sms = OMAP243X_SMS_BASE,
295 .ctrl = OMAP243X_CTRL_BASE,
296 .prm = OMAP2430_PRM_BASE,
297 .cm = OMAP2430_CM_BASE,
298 .uart1_phys = OMAP2_UART1_BASE,
299 .uart2_phys = OMAP2_UART2_BASE,
300 .uart3_phys = OMAP2_UART3_BASE,
303 void __init omap2_set_globals_243x(void)
305 __omap2_set_globals(&omap243x_globals);
309 #if defined(CONFIG_ARCH_OMAP3)
311 static struct omap_globals omap3_globals = {
312 .class = OMAP343X_CLASS,
313 .tap = OMAP2_L4_IO_ADDRESS(0x4830A000),
314 .sdrc = OMAP343X_SDRC_BASE,
315 .sms = OMAP343X_SMS_BASE,
316 .ctrl = OMAP343X_CTRL_BASE,
317 .prm = OMAP3430_PRM_BASE,
318 .cm = OMAP3430_CM_BASE,
319 .uart1_phys = OMAP3_UART1_BASE,
320 .uart2_phys = OMAP3_UART2_BASE,
321 .uart3_phys = OMAP3_UART3_BASE,
322 .uart4_phys = OMAP3_UART4_BASE, /* Only on 3630 */
325 void __init omap2_set_globals_3xxx(void)
327 __omap2_set_globals(&omap3_globals);
330 void __init omap3_map_io(void)
332 omap2_set_globals_3xxx();
333 omap34xx_map_common_io();
337 #if defined(CONFIG_ARCH_OMAP4)
338 static struct omap_globals omap4_globals = {
339 .class = OMAP443X_CLASS,
340 .tap = OMAP2_L4_IO_ADDRESS(OMAP443X_SCM_BASE),
341 .ctrl = OMAP443X_CTRL_BASE,
342 .prm = OMAP4430_PRM_BASE,
343 .cm = OMAP4430_CM_BASE,
344 .cm2 = OMAP4430_CM2_BASE,
345 .uart1_phys = OMAP4_UART1_BASE,
346 .uart2_phys = OMAP4_UART2_BASE,
347 .uart3_phys = OMAP4_UART3_BASE,
348 .uart4_phys = OMAP4_UART4_BASE,
351 void __init omap2_set_globals_443x(void)
353 omap2_set_globals_tap(&omap4_globals);
354 omap2_set_globals_control(&omap4_globals);
355 omap2_set_globals_prcm(&omap4_globals);
356 omap2_set_globals_uart(&omap4_globals);