| /* |
| * linux/arch/arm/plat-omap/common.c |
| * |
| * Code common to all OMAP machines. |
| * The file is created by Tony Lindgren <tony@atomide.com> |
| * |
| * Copyright (C) 2009 Texas Instruments |
| * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/delay.h> |
| #include <linux/console.h> |
| #include <linux/serial.h> |
| #include <linux/tty.h> |
| #include <linux/serial_8250.h> |
| #include <linux/serial_reg.h> |
| #include <linux/clk.h> |
| #include <linux/io.h> |
| #include <linux/omapfb.h> |
| |
| #include <mach/hardware.h> |
| #include <asm/system.h> |
| #include <asm/pgtable.h> |
| #include <asm/mach/map.h> |
| #include <asm/setup.h> |
| |
| #include <plat/common.h> |
| #include <plat/board.h> |
| #include <plat/control.h> |
| #include <plat/mux.h> |
| #include <plat/fpga.h> |
| #include <plat/serial.h> |
| #include <plat/vram.h> |
| |
| #include <plat/clock.h> |
| |
| #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) |
| # include "../mach-omap2/sdrc.h" |
| #endif |
| |
| #define NO_LENGTH_CHECK 0xffffffff |
| |
| struct omap_board_config_kernel *omap_board_config; |
| int omap_board_config_size; |
| |
| static const void *get_config(u16 tag, size_t len, int skip, size_t *len_out) |
| { |
| struct omap_board_config_kernel *kinfo = NULL; |
| int i; |
| |
| /* Try to find the config from the board-specific structures |
| * in the kernel. */ |
| for (i = 0; i < omap_board_config_size; i++) { |
| if (omap_board_config[i].tag == tag) { |
| if (skip == 0) { |
| kinfo = &omap_board_config[i]; |
| break; |
| } else { |
| skip--; |
| } |
| } |
| } |
| if (kinfo == NULL) |
| return NULL; |
| return kinfo->data; |
| } |
| |
| const void *__omap_get_config(u16 tag, size_t len, int nr) |
| { |
| return get_config(tag, len, nr, NULL); |
| } |
| EXPORT_SYMBOL(__omap_get_config); |
| |
| const void *omap_get_var_config(u16 tag, size_t *len) |
| { |
| return get_config(tag, NO_LENGTH_CHECK, 0, len); |
| } |
| EXPORT_SYMBOL(omap_get_var_config); |
| |
| void __init omap_reserve(void) |
| { |
| omapfb_reserve_sdram_memblock(); |
| omap_vram_reserve_sdram_memblock(); |
| } |
| |
| /* |
| * 32KHz clocksource ... always available, on pretty most chips except |
| * OMAP 730 and 1510. Other timers could be used as clocksources, with |
| * higher resolution in free-running counter modes (e.g. 12 MHz xtal), |
| * but systems won't necessarily want to spend resources that way. |
| */ |
| |
| #define OMAP16XX_TIMER_32K_SYNCHRONIZED 0xfffbc410 |
| |
| #if !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) |
| |
| #include <linux/clocksource.h> |
| |
| /* |
| * offset_32k holds the init time counter value. It is then subtracted |
| * from every counter read to achieve a counter that counts time from the |
| * kernel boot (needed for sched_clock()). |
| */ |
| static u32 offset_32k __read_mostly; |
| |
| #ifdef CONFIG_ARCH_OMAP16XX |
| static cycle_t omap16xx_32k_read(struct clocksource *cs) |
| { |
| return omap_readl(OMAP16XX_TIMER_32K_SYNCHRONIZED) - offset_32k; |
| } |
| #else |
| #define omap16xx_32k_read NULL |
| #endif |
| |
| #ifdef CONFIG_ARCH_OMAP2420 |
| static cycle_t omap2420_32k_read(struct clocksource *cs) |
| { |
| return omap_readl(OMAP2420_32KSYNCT_BASE + 0x10) - offset_32k; |
| } |
| #else |
| #define omap2420_32k_read NULL |
| #endif |
| |
| #ifdef CONFIG_ARCH_OMAP2430 |
| static cycle_t omap2430_32k_read(struct clocksource *cs) |
| { |
| return omap_readl(OMAP2430_32KSYNCT_BASE + 0x10) - offset_32k; |
| } |
| #else |
| #define omap2430_32k_read NULL |
| #endif |
| |
| #ifdef CONFIG_ARCH_OMAP3 |
| static cycle_t omap34xx_32k_read(struct clocksource *cs) |
| { |
| return omap_readl(OMAP3430_32KSYNCT_BASE + 0x10) - offset_32k; |
| } |
| #else |
| #define omap34xx_32k_read NULL |
| #endif |
| |
| #ifdef CONFIG_ARCH_OMAP4 |
| static cycle_t omap44xx_32k_read(struct clocksource *cs) |
| { |
| return omap_readl(OMAP4430_32KSYNCT_BASE + 0x10) - offset_32k; |
| } |
| #else |
| #define omap44xx_32k_read NULL |
| #endif |
| |
| /* |
| * Kernel assumes that sched_clock can be called early but may not have |
| * things ready yet. |
| */ |
| static cycle_t omap_32k_read_dummy(struct clocksource *cs) |
| { |
| return 0; |
| } |
| |
| static struct clocksource clocksource_32k = { |
| .name = "32k_counter", |
| .rating = 250, |
| .read = omap_32k_read_dummy, |
| .mask = CLOCKSOURCE_MASK(32), |
| .shift = 10, |
| .flags = CLOCK_SOURCE_IS_CONTINUOUS, |
| }; |
| |
| /* |
| * Returns current time from boot in nsecs. It's OK for this to wrap |
| * around for now, as it's just a relative time stamp. |
| */ |
| unsigned long long sched_clock(void) |
| { |
| return clocksource_cyc2ns(clocksource_32k.read(&clocksource_32k), |
| clocksource_32k.mult, clocksource_32k.shift); |
| } |
| |
| /** |
| * read_persistent_clock - Return time from a persistent clock. |
| * |
| * Reads the time from a source which isn't disabled during PM, the |
| * 32k sync timer. Convert the cycles elapsed since last read into |
| * nsecs and adds to a monotonically increasing timespec. |
| */ |
| static struct timespec persistent_ts; |
| static cycles_t cycles, last_cycles; |
| void read_persistent_clock(struct timespec *ts) |
| { |
| unsigned long long nsecs; |
| cycles_t delta; |
| struct timespec *tsp = &persistent_ts; |
| |
| last_cycles = cycles; |
| cycles = clocksource_32k.read(&clocksource_32k); |
| delta = cycles - last_cycles; |
| |
| nsecs = clocksource_cyc2ns(delta, |
| clocksource_32k.mult, clocksource_32k.shift); |
| |
| timespec_add_ns(tsp, nsecs); |
| *ts = *tsp; |
| } |
| |
| static int __init omap_init_clocksource_32k(void) |
| { |
| static char err[] __initdata = KERN_ERR |
| "%s: can't register clocksource!\n"; |
| |
| if (cpu_is_omap16xx() || cpu_class_is_omap2()) { |
| struct clk *sync_32k_ick; |
| |
| if (cpu_is_omap16xx()) |
| clocksource_32k.read = omap16xx_32k_read; |
| else if (cpu_is_omap2420()) |
| clocksource_32k.read = omap2420_32k_read; |
| else if (cpu_is_omap2430()) |
| clocksource_32k.read = omap2430_32k_read; |
| else if (cpu_is_omap34xx()) |
| clocksource_32k.read = omap34xx_32k_read; |
| else if (cpu_is_omap44xx()) |
| clocksource_32k.read = omap44xx_32k_read; |
| else |
| return -ENODEV; |
| |
| sync_32k_ick = clk_get(NULL, "omap_32ksync_ick"); |
| if (sync_32k_ick) |
| clk_enable(sync_32k_ick); |
| |
| clocksource_32k.mult = clocksource_hz2mult(32768, |
| clocksource_32k.shift); |
| |
| offset_32k = clocksource_32k.read(&clocksource_32k); |
| |
| if (clocksource_register(&clocksource_32k)) |
| printk(err, clocksource_32k.name); |
| } |
| return 0; |
| } |
| arch_initcall(omap_init_clocksource_32k); |
| |
| #endif /* !(defined(CONFIG_ARCH_OMAP730) || defined(CONFIG_ARCH_OMAP15XX)) */ |
| |
| /* Global address base setup code */ |
| |
| #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) |
| |
| static void __init __omap2_set_globals(struct omap_globals *omap2_globals) |
| { |
| omap2_set_globals_tap(omap2_globals); |
| omap2_set_globals_sdrc(omap2_globals); |
| omap2_set_globals_control(omap2_globals); |
| omap2_set_globals_prcm(omap2_globals); |
| } |
| |
| #endif |
| |
| #if defined(CONFIG_ARCH_OMAP2420) |
| |
| static struct omap_globals omap242x_globals = { |
| .class = OMAP242X_CLASS, |
| .tap = OMAP2_L4_IO_ADDRESS(0x48014000), |
| .sdrc = OMAP2420_SDRC_BASE, |
| .sms = OMAP2420_SMS_BASE, |
| .ctrl = OMAP2420_CTRL_BASE, |
| .prm = OMAP2420_PRM_BASE, |
| .cm = OMAP2420_CM_BASE, |
| }; |
| |
| void __init omap2_set_globals_242x(void) |
| { |
| __omap2_set_globals(&omap242x_globals); |
| } |
| #endif |
| |
| #if defined(CONFIG_ARCH_OMAP2430) |
| |
| static struct omap_globals omap243x_globals = { |
| .class = OMAP243X_CLASS, |
| .tap = OMAP2_L4_IO_ADDRESS(0x4900a000), |
| .sdrc = OMAP243X_SDRC_BASE, |
| .sms = OMAP243X_SMS_BASE, |
| .ctrl = OMAP243X_CTRL_BASE, |
| .prm = OMAP2430_PRM_BASE, |
| .cm = OMAP2430_CM_BASE, |
| }; |
| |
| void __init omap2_set_globals_243x(void) |
| { |
| __omap2_set_globals(&omap243x_globals); |
| } |
| #endif |
| |
| #if defined(CONFIG_ARCH_OMAP3) |
| |
| static struct omap_globals omap3_globals = { |
| .class = OMAP343X_CLASS, |
| .tap = OMAP2_L4_IO_ADDRESS(0x4830A000), |
| .sdrc = OMAP343X_SDRC_BASE, |
| .sms = OMAP343X_SMS_BASE, |
| .ctrl = OMAP343X_CTRL_BASE, |
| .prm = OMAP3430_PRM_BASE, |
| .cm = OMAP3430_CM_BASE, |
| }; |
| |
| void __init omap2_set_globals_3xxx(void) |
| { |
| __omap2_set_globals(&omap3_globals); |
| } |
| |
| void __init omap3_map_io(void) |
| { |
| omap2_set_globals_3xxx(); |
| omap34xx_map_common_io(); |
| } |
| #endif |
| |
| #if defined(CONFIG_ARCH_OMAP4) |
| static struct omap_globals omap4_globals = { |
| .class = OMAP443X_CLASS, |
| .tap = OMAP2_L4_IO_ADDRESS(OMAP443X_SCM_BASE), |
| .ctrl = OMAP443X_SCM_BASE, |
| .ctrl_pad = OMAP443X_CTRL_BASE, |
| .prm = OMAP4430_PRM_BASE, |
| .cm = OMAP4430_CM_BASE, |
| .cm2 = OMAP4430_CM2_BASE, |
| }; |
| |
| void __init omap2_set_globals_443x(void) |
| { |
| omap2_set_globals_tap(&omap4_globals); |
| omap2_set_globals_control(&omap4_globals); |
| omap2_set_globals_prcm(&omap4_globals); |
| } |
| #endif |
| |