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 struct omap_board_config_kernel *omap_board_config;
48 int omap_board_config_size;
50 /* used by omap-smp.c and board-4430sdp.c */
51 void __iomem *gic_cpu_base_addr;
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);
88 * 32KHz clocksource ... always available, on pretty most chips except
89 * OMAP 730 and 1510. Other timers could be used as clocksources, with
90 * higher resolution in free-running counter modes (e.g. 12 MHz xtal),
91 * but systems won't necessarily want to spend resources that way.
94 #define OMAP16XX_TIMER_32K_SYNCHRONIZED 0xfffbc410
96 #if !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX))
98 #include <linux/clocksource.h>
101 * offset_32k holds the init time counter value. It is then subtracted
102 * from every counter read to achieve a counter that counts time from the
103 * kernel boot (needed for sched_clock()).
105 static u32 offset_32k __read_mostly;
107 #ifdef CONFIG_ARCH_OMAP16XX
108 static cycle_t omap16xx_32k_read(struct clocksource *cs)
110 return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED) - offset_32k;
113 #define omap16xx_32k_read NULL
116 #ifdef CONFIG_ARCH_OMAP2420
117 static cycle_t omap2420_32k_read(struct clocksource *cs)
119 return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10) - offset_32k;
122 #define omap2420_32k_read NULL
125 #ifdef CONFIG_ARCH_OMAP2430
126 static cycle_t omap2430_32k_read(struct clocksource *cs)
128 return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10) - offset_32k;
131 #define omap2430_32k_read NULL
134 #ifdef CONFIG_ARCH_OMAP3
135 static cycle_t omap34xx_32k_read(struct clocksource *cs)
137 return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10) - offset_32k;
140 #define omap34xx_32k_read NULL
143 #ifdef CONFIG_ARCH_OMAP4
144 static cycle_t omap44xx_32k_read(struct clocksource *cs)
146 return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10) - offset_32k;
149 #define omap44xx_32k_read NULL
153 * Kernel assumes that sched_clock can be called early but may not have
156 static cycle_t omap_32k_read_dummy(struct clocksource *cs)
161 static struct clocksource clocksource_32k = {
162 .name = "32k_counter",
164 .read = omap_32k_read_dummy,
165 .mask = CLOCKSOURCE_MASK(32),
167 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
171 * Returns current time from boot in nsecs. It's OK for this to wrap
172 * around for now, as it's just a relative time stamp.
174 unsigned long long sched_clock(void)
176 return clocksource_cyc2ns(clocksource_32k.read(&clocksource_32k),
177 clocksource_32k.mult, clocksource_32k.shift);
181 * read_persistent_clock - Return time from a persistent clock.
183 * Reads the time from a source which isn't disabled during PM, the
184 * 32k sync timer. Convert the cycles elapsed since last read into
185 * nsecs and adds to a monotonically increasing timespec.
187 static struct timespec persistent_ts;
188 static cycles_t cycles, last_cycles;
189 void read_persistent_clock(struct timespec *ts)
191 unsigned long long nsecs;
193 struct timespec *tsp = &persistent_ts;
195 last_cycles = cycles;
196 cycles = clocksource_32k.read(&clocksource_32k);
197 delta = cycles - last_cycles;
199 nsecs = clocksource_cyc2ns(delta,
200 clocksource_32k.mult, clocksource_32k.shift);
202 timespec_add_ns(tsp, nsecs);
206 static int __init omap_init_clocksource_32k(void)
208 static char err[] __initdata = KERN_ERR
209 "%s: can't register clocksource!\n";
211 if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
212 struct clk *sync_32k_ick;
214 if (cpu_is_omap16xx())
215 clocksource_32k.read = omap16xx_32k_read;
216 else if (cpu_is_omap2420())
217 clocksource_32k.read = omap2420_32k_read;
218 else if (cpu_is_omap2430())
219 clocksource_32k.read = omap2430_32k_read;
220 else if (cpu_is_omap34xx())
221 clocksource_32k.read = omap34xx_32k_read;
222 else if (cpu_is_omap44xx())
223 clocksource_32k.read = omap44xx_32k_read;
227 sync_32k_ick = clk_get(NULL, "omap_32ksync_ick");
229 clk_enable(sync_32k_ick);
231 clocksource_32k.mult = clocksource_hz2mult(32768,
232 clocksource_32k.shift);
234 offset_32k = clocksource_32k.read(&clocksource_32k);
236 if (clocksource_register(&clocksource_32k))
237 printk(err, clocksource_32k.name);
241 arch_initcall(omap_init_clocksource_32k);
243 #endif /* !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) */
245 /* Global address base setup code */
247 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
249 static void __init __omap2_set_globals(struct omap_globals *omap2_globals)
251 omap2_set_globals_tap(omap2_globals);
252 omap2_set_globals_sdrc(omap2_globals);
253 omap2_set_globals_control(omap2_globals);
254 omap2_set_globals_prcm(omap2_globals);
255 omap2_set_globals_uart(omap2_globals);
260 #if defined(CONFIG_ARCH_OMAP2420)
262 static struct omap_globals omap242x_globals = {
263 .class = OMAP242X_CLASS,
264 .tap = OMAP2_L4_IO_ADDRESS(0x48014000),
265 .sdrc = OMAP2420_SDRC_BASE,
266 .sms = OMAP2420_SMS_BASE,
267 .ctrl = OMAP2420_CTRL_BASE,
268 .prm = OMAP2420_PRM_BASE,
269 .cm = OMAP2420_CM_BASE,
270 .uart1_phys = OMAP2_UART1_BASE,
271 .uart2_phys = OMAP2_UART2_BASE,
272 .uart3_phys = OMAP2_UART3_BASE,
275 void __init omap2_set_globals_242x(void)
277 __omap2_set_globals(&omap242x_globals);
281 #if defined(CONFIG_ARCH_OMAP2430)
283 static struct omap_globals omap243x_globals = {
284 .class = OMAP243X_CLASS,
285 .tap = OMAP2_L4_IO_ADDRESS(0x4900a000),
286 .sdrc = OMAP243X_SDRC_BASE,
287 .sms = OMAP243X_SMS_BASE,
288 .ctrl = OMAP243X_CTRL_BASE,
289 .prm = OMAP2430_PRM_BASE,
290 .cm = OMAP2430_CM_BASE,
291 .uart1_phys = OMAP2_UART1_BASE,
292 .uart2_phys = OMAP2_UART2_BASE,
293 .uart3_phys = OMAP2_UART3_BASE,
296 void __init omap2_set_globals_243x(void)
298 __omap2_set_globals(&omap243x_globals);
302 #if defined(CONFIG_ARCH_OMAP3)
304 static struct omap_globals omap3_globals = {
305 .class = OMAP343X_CLASS,
306 .tap = OMAP2_L4_IO_ADDRESS(0x4830A000),
307 .sdrc = OMAP343X_SDRC_BASE,
308 .sms = OMAP343X_SMS_BASE,
309 .ctrl = OMAP343X_CTRL_BASE,
310 .prm = OMAP3430_PRM_BASE,
311 .cm = OMAP3430_CM_BASE,
312 .uart1_phys = OMAP3_UART1_BASE,
313 .uart2_phys = OMAP3_UART2_BASE,
314 .uart3_phys = OMAP3_UART3_BASE,
317 void __init omap2_set_globals_343x(void)
319 __omap2_set_globals(&omap3_globals);
322 void __init omap2_set_globals_36xx(void)
324 omap3_globals.uart4_phys = OMAP3_UART4_BASE;
326 __omap2_set_globals(&omap3_globals);
330 #if defined(CONFIG_ARCH_OMAP4)
331 static struct omap_globals omap4_globals = {
332 .class = OMAP443X_CLASS,
333 .tap = OMAP2_L4_IO_ADDRESS(OMAP443X_SCM_BASE),
334 .ctrl = OMAP443X_CTRL_BASE,
335 .prm = OMAP4430_PRM_BASE,
336 .cm = OMAP4430_CM_BASE,
337 .cm2 = OMAP4430_CM2_BASE,
338 .uart1_phys = OMAP4_UART1_BASE,
339 .uart2_phys = OMAP4_UART2_BASE,
340 .uart3_phys = OMAP4_UART3_BASE,
341 .uart4_phys = OMAP4_UART4_BASE,
344 void __init omap2_set_globals_443x(void)
346 omap2_set_globals_tap(&omap4_globals);
347 omap2_set_globals_control(&omap4_globals);
348 omap2_set_globals_prcm(&omap4_globals);
349 omap2_set_globals_uart(&omap4_globals);