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 <plat/common.h>
33 #include <plat/board.h>
34 #include <plat/control.h>
36 #include <plat/fpga.h>
37 #include <plat/serial.h>
39 #include <plat/clock.h>
41 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
42 # include "../mach-omap2/sdrc.h"
45 #define NO_LENGTH_CHECK 0xffffffff
47 unsigned char omap_bootloader_tag[512];
48 int omap_bootloader_tag_len;
50 struct omap_board_config_kernel *omap_board_config;
51 int omap_board_config_size;
53 /* used by omap-smp.c and board-4430sdp.c */
54 void __iomem *gic_cpu_base_addr;
56 static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out)
58 struct omap_board_config_kernel *kinfo = NULL;
61 /* Try to find the config from the board-specific structures
63 for (i = 0; i < omap_board_config_size; i++) {
64 if (omap_board_config[i].tag == tag) {
66 kinfo = &omap_board_config[i];
78 const void *__omap_get_config(u16 tag, size_t len, int nr)
80 return get_config(tag, len, nr, NULL);
82 EXPORT_SYMBOL(__omap_get_config);
84 const void *omap_get_var_config(u16 tag, size_t *len)
86 return get_config(tag, NO_LENGTH_CHECK, 0, len);
88 EXPORT_SYMBOL(omap_get_var_config);
91 * 32KHz clocksource ... always available, on pretty most chips except
92 * OMAP 730 and 1510. Other timers could be used as clocksources, with
93 * higher resolution in free-running counter modes (e.g. 12 MHz xtal),
94 * but systems won't necessarily want to spend resources that way.
97 #define OMAP16XX_TIMER_32K_SYNCHRONIZED 0xfffbc410
99 #if !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX))
101 #include <linux/clocksource.h>
104 * offset_32k holds the init time counter value. It is then subtracted
105 * from every counter read to achieve a counter that counts time from the
106 * kernel boot (needed for sched_clock()).
108 static u32 offset_32k __read_mostly;
110 #ifdef CONFIG_ARCH_OMAP16XX
111 static cycle_t omap16xx_32k_read(struct clocksource *cs)
113 return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED) - offset_32k;
116 #define omap16xx_32k_read NULL
119 #ifdef CONFIG_ARCH_OMAP2420
120 static cycle_t omap2420_32k_read(struct clocksource *cs)
122 return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10) - offset_32k;
125 #define omap2420_32k_read NULL
128 #ifdef CONFIG_ARCH_OMAP2430
129 static cycle_t omap2430_32k_read(struct clocksource *cs)
131 return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10) - offset_32k;
134 #define omap2430_32k_read NULL
137 #ifdef CONFIG_ARCH_OMAP3
138 static cycle_t omap34xx_32k_read(struct clocksource *cs)
140 return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10) - offset_32k;
143 #define omap34xx_32k_read NULL
146 #ifdef CONFIG_ARCH_OMAP4
147 static cycle_t omap44xx_32k_read(struct clocksource *cs)
149 return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10) - offset_32k;
152 #define omap44xx_32k_read NULL
156 * Kernel assumes that sched_clock can be called early but may not have
159 static cycle_t omap_32k_read_dummy(struct clocksource *cs)
164 static struct clocksource clocksource_32k = {
165 .name = "32k_counter",
167 .read = omap_32k_read_dummy,
168 .mask = CLOCKSOURCE_MASK(32),
170 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
174 * Returns current time from boot in nsecs. It's OK for this to wrap
175 * around for now, as it's just a relative time stamp.
177 unsigned long long sched_clock(void)
179 return clocksource_cyc2ns(clocksource_32k.read(&clocksource_32k),
180 clocksource_32k.mult, clocksource_32k.shift);
184 * read_persistent_clock - Return time from a persistent clock.
186 * Reads the time from a source which isn't disabled during PM, the
187 * 32k sync timer. Convert the cycles elapsed since last read into
188 * nsecs and adds to a monotonically increasing timespec.
190 static struct timespec persistent_ts;
191 static cycles_t cycles, last_cycles;
192 void read_persistent_clock(struct timespec *ts)
194 unsigned long long nsecs;
196 struct timespec *tsp = &persistent_ts;
198 last_cycles = cycles;
199 cycles = clocksource_32k.read(&clocksource_32k);
200 delta = cycles - last_cycles;
202 nsecs = clocksource_cyc2ns(delta,
203 clocksource_32k.mult, clocksource_32k.shift);
205 timespec_add_ns(tsp, nsecs);
209 static int __init omap_init_clocksource_32k(void)
211 static char err[] __initdata = KERN_ERR
212 "%s: can't register clocksource!\n";
214 if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
215 struct clk *sync_32k_ick;
217 if (cpu_is_omap16xx())
218 clocksource_32k.read = omap16xx_32k_read;
219 else if (cpu_is_omap2420())
220 clocksource_32k.read = omap2420_32k_read;
221 else if (cpu_is_omap2430())
222 clocksource_32k.read = omap2430_32k_read;
223 else if (cpu_is_omap34xx())
224 clocksource_32k.read = omap34xx_32k_read;
225 else if (cpu_is_omap44xx())
226 clocksource_32k.read = omap44xx_32k_read;
230 sync_32k_ick = clk_get(NULL, "omap_32ksync_ick");
232 clk_enable(sync_32k_ick);
234 clocksource_32k.mult = clocksource_hz2mult(32768,
235 clocksource_32k.shift);
237 offset_32k = clocksource_32k.read(&clocksource_32k);
239 if (clocksource_register(&clocksource_32k))
240 printk(err, clocksource_32k.name);
244 arch_initcall(omap_init_clocksource_32k);
246 #endif /* !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) */
248 /* Global address base setup code */
250 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
252 static void __init __omap2_set_globals(struct omap_globals *omap2_globals)
254 omap2_set_globals_tap(omap2_globals);
255 omap2_set_globals_sdrc(omap2_globals);
256 omap2_set_globals_control(omap2_globals);
257 omap2_set_globals_prcm(omap2_globals);
258 omap2_set_globals_uart(omap2_globals);
263 #if defined(CONFIG_ARCH_OMAP2420)
265 static struct omap_globals omap242x_globals = {
266 .class = OMAP242X_CLASS,
267 .tap = OMAP2_L4_IO_ADDRESS(0x48014000),
268 .sdrc = OMAP2420_SDRC_BASE,
269 .sms = OMAP2420_SMS_BASE,
270 .ctrl = OMAP2420_CTRL_BASE,
271 .prm = OMAP2420_PRM_BASE,
272 .cm = OMAP2420_CM_BASE,
273 .uart1_phys = OMAP2_UART1_BASE,
274 .uart2_phys = OMAP2_UART2_BASE,
275 .uart3_phys = OMAP2_UART3_BASE,
278 void __init omap2_set_globals_242x(void)
280 __omap2_set_globals(&omap242x_globals);
284 #if defined(CONFIG_ARCH_OMAP2430)
286 static struct omap_globals omap243x_globals = {
287 .class = OMAP243X_CLASS,
288 .tap = OMAP2_L4_IO_ADDRESS(0x4900a000),
289 .sdrc = OMAP243X_SDRC_BASE,
290 .sms = OMAP243X_SMS_BASE,
291 .ctrl = OMAP243X_CTRL_BASE,
292 .prm = OMAP2430_PRM_BASE,
293 .cm = OMAP2430_CM_BASE,
294 .uart1_phys = OMAP2_UART1_BASE,
295 .uart2_phys = OMAP2_UART2_BASE,
296 .uart3_phys = OMAP2_UART3_BASE,
299 void __init omap2_set_globals_243x(void)
301 __omap2_set_globals(&omap243x_globals);
305 #if defined(CONFIG_ARCH_OMAP3)
307 static struct omap_globals omap3_globals = {
308 .class = OMAP343X_CLASS,
309 .tap = OMAP2_L4_IO_ADDRESS(0x4830A000),
310 .sdrc = OMAP343X_SDRC_BASE,
311 .sms = OMAP343X_SMS_BASE,
312 .ctrl = OMAP343X_CTRL_BASE,
313 .prm = OMAP3430_PRM_BASE,
314 .cm = OMAP3430_CM_BASE,
315 .uart1_phys = OMAP3_UART1_BASE,
316 .uart2_phys = OMAP3_UART2_BASE,
317 .uart3_phys = OMAP3_UART3_BASE,
320 void __init omap2_set_globals_343x(void)
322 __omap2_set_globals(&omap3_globals);
325 void __init omap2_set_globals_36xx(void)
327 omap3_globals.uart4_phys = OMAP3_UART4_BASE;
329 __omap2_set_globals(&omap3_globals);
333 #if defined(CONFIG_ARCH_OMAP4)
334 static struct omap_globals omap4_globals = {
335 .class = OMAP443X_CLASS,
336 .tap = OMAP2_L4_IO_ADDRESS(OMAP443X_SCM_BASE),
337 .ctrl = OMAP443X_CTRL_BASE,
338 .prm = OMAP4430_PRM_BASE,
339 .cm = OMAP4430_CM_BASE,
340 .cm2 = OMAP4430_CM2_BASE,
341 .uart1_phys = OMAP4_UART1_BASE,
342 .uart2_phys = OMAP4_UART2_BASE,
343 .uart3_phys = OMAP4_UART3_BASE,
344 .uart4_phys = OMAP4_UART4_BASE,
347 void __init omap2_set_globals_443x(void)
349 omap2_set_globals_tap(&omap4_globals);
350 omap2_set_globals_control(&omap4_globals);
351 omap2_set_globals_prcm(&omap4_globals);
352 omap2_set_globals_uart(&omap4_globals);